JP2013047971A - Alarm unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To output an appropriate alarm for a fire and other events according to situations by determining a fire and other events in a complex manner from fire detection and detection of the other events.SOLUTION: An alarm unit 10-2 includes a fire sensor 22 for outputting a fire detection signal, a CO gas sensor 15 for outputting a CO gas detection signal, a reporting part 26 for outputting an alarm, and an abnormality monitoring part 46 for making the alarm including a fire and gas leakage to be outputted from the reporting part 26 on the basis of the fire detection signal and the CO gas detection signal. The abnormality monitoring part 46 sets detection sensitivity of a fire by the fire detection signal high when the CO gas detection signal is obtained, and sets the detection sensitivity of a fire by the fire detection signal low when the CO gas detection signal is not obtained. Also, the abnormality monitoring part 46 determines which of fire levels set in two or more stages a fire belongs to according to a size of the fire detection signal, and determines alarm contents to be outputted according to the determined fire level and presence/absence of gas leakage detection by the CO gas detection signal.

Description

The present invention relates to a combined alarm device that is installed in a house and detects and alarms a fire and an event other than a fire.

  Conventionally, residential alarms (hereinafter referred to as “residential alarms”) for detecting and alarming fires in houses have become widespread, and in recent years, a plurality of residential alarms have been installed in one dwelling unit. There is an increasing tendency to monitor abnormalities such as fire every time.

  In addition to residential alarms, various alarms such as a CO gas alarm that detects CO gas and alarms, and a burglar alarm that detects and alerts intruders are installed in each house. We monitor CO gas and theft.

  As described above, when a monitoring target such as fire, CO gas, and theft is monitored with a single sensor function, only a specific abnormality can be detected. For example, in the case of a residential alarm that monitors fires, a non-fire caused by cigarettes or cooking smoke may be falsely detected and an alarm sound is emitted. To prevent such non-fire reports, the fire detection sensitivity is lowered. As a result, the time from the occurrence of a fire until the alarm is increased.

In order to solve this problem, there has been proposed a human body detector provided in the house alarm device, and when the presence of a person is not detected, the volume is set larger than when the presence of a person is detected (Patent Literature). 2).

JP 2007-094719 A JP 2006-235780 A Japanese Patent Application Laid-Open No. 7-230592

  However, in such alarm devices used in houses such as conventional residential alarms, CO gas alarms, and burglar alarms, they have a single monitoring function depending on the usage such as fire, CO gas, and theft. If an alarm is installed and you want to perform total security monitoring such as fire, CO gas, and theft in a house, purchase multiple types of alarms with a single monitoring function such as fire, gas leak, and theft. Therefore, there is a problem that handling is complicated and cost increases.

  In addition to the fire detector, in the case of a resident alarm equipped with a human body detector, the volume of the alarm sound is changed depending on the presence or absence of a person, but the human body detector originally detects intruders. Although it is intended and has the advantage of being able to control the volume when a fire is detected, the original function as a human body detection unit is not necessarily demonstrated, and a new burglar alarm is purchased for theft monitoring. There is a problem that must be installed.

  Furthermore, when a monitoring target such as a fire, CO gas, or theft is monitored with a single sensor function, only a specific abnormality can be detected.

The present invention provides an alarm device capable of outputting an appropriate alarm including a fire and other events according to the situation by judging a fire and other events in combination from the detection of a fire and other events. With the goal.

The present invention provides a composite type alarm device,
A fire detection unit that detects a fire and outputs a fire detection signal;
A CO gas sensor that detects CO gas and outputs a CO gas detection signal;
A notification unit for outputting an alarm;
Based on the fire detection signal and the CO gas detection signal, an abnormality monitoring unit that outputs an alarm including a fire and gas leakage from the notification unit;
With
The abnormality monitoring unit sets the fire detection sensitivity high when the CO gas detection signal is obtained, and sets the fire detection sensitivity low when the CO gas detection signal is not obtained. It is characterized by doing.

  For example, when the CO gas detection signal is obtained, the abnormality monitoring unit sets a low threshold for judging a fire based on the fire detection signal, and judges a fire based on the fire detection signal when the CO gas detection signal is not obtained. Set the threshold value high.

  In addition, the abnormality monitoring unit sets a short time for judging the fire by the fire detection signal when the CO gas detection signal is obtained, and judges the fire by the fire detection signal when the CO gas detection signal is not obtained. You may make it set time long.

  In addition, the abnormality monitoring unit determines which of the fire levels set in multiple stages according to the magnitude of the fire detection signal, and the alarm content according to the determined fire level and the presence or absence of gas leak detection by the CO detection signal Is output from the notification unit.

Here, the abnormality monitoring unit performs alarm control based on a combination of a plurality of levels of fire levels and presence / absence of gas leak detection.

  According to the alarm device of the present invention, in addition to fire detection, other events such as human detection and CO gas detection are detected to determine fire in a complex manner. It is possible to achieve a detailed and appropriate fire judgment.

  For example, when detecting people, the fire detection sensitivity is set low, so it is possible to reliably prevent non-fire reports such as cigarettes and cooking smoke from occurring, while people are detected. If not, since the fire detection sensitivity is set high, it is possible to quickly notify the fire by shortening the time from the occurrence of the fire to the alarm.

In normal times when there is no fire factor such as fire level 0, the theft alarm function or gas leak alarm function based on intruder detection is enabled, and the original detection monitoring with other signal detectors that detect events other than fire The function can be used for monitoring, and a plurality of types of events can be monitored by a single alarm device. Installation and management can be facilitated and costs can be reduced as compared with the case where an alarm device is installed for each event to be monitored.

Explanatory drawing which showed the installation situation in the house of the residence guard by this invention The block diagram which showed 1st Embodiment of the house alarm device by this invention The block diagram which showed the fire judgment table used in 1st Embodiment of FIG. The flowchart which showed the fire monitoring process by 1st Embodiment of FIG. The block diagram which showed 2nd Embodiment of the house alarm device by this invention The block diagram which showed the alarm control table used in 2nd Embodiment of FIG. The flowchart which showed the fire monitoring process by 2nd Embodiment of FIG. The block diagram which showed 3rd Embodiment of the house alarm device by this invention The block diagram which showed the fire judgment table used in 3rd Embodiment of FIG. The flowchart which showed the fire monitoring process by 3rd Embodiment of FIG. The block diagram which showed 4th Embodiment of the house alarm device by this invention The block diagram which showed the alarm control table used in 4th Embodiment of FIG. The flowchart which showed the fire monitoring process by 4th Embodiment of FIG.

  FIG. 1 is an explanatory view showing an installation state of a house alarm according to the present invention in a house. In FIG. 1, residence guards 10-1 and 10-2 according to the present invention are installed in a house 11. The residence guard 10-1 is installed in a bedroom of the house 11, for example, while the residence guard 10-2 is installed in the kitchen.

  The home guard 10-1 includes a smoke sensing unit 12, detects smoke due to fire, and outputs a smoke detection signal. The residential alarm 10-1 is provided with a human sensor 14 as an other signal detector that detects an event other than a fire and outputs another signal. The human sensor 14 detects infrared rays emitted from the human body and outputs a human detection signal. In addition, the house alarm device 10-1 is provided with a speaker 16 and an alarm stop switch 18.

  Such a house alarm device 10-1 simultaneously performs smoke detection due to fire by the smoke sensor 12 and human detection by the human sensor 14, and uses the smoke detection signal from the smoke sensor 12 and the human sensor 14. Based on the human detection signal, a fire is determined in combination, and an alarm for intruder detection, which is an event other than a fire, is performed.

  On the other hand, the residential alarm device 10-2 installed in the kitchen is the same as the residential alarm device 10-1, except that the smoke detector 12, the speaker 16, and the alarm stop switch 18 are provided. A CO gas sensor 15 is provided as an other signal detector that detects and outputs another signal.

  Such a house alarm device 10-2 simultaneously detects smoke due to fire by the smoke sensing unit 12 and CO gas detection by the CO gas sensor 15, and detects the smoke detection signal from the smoke sensing unit 12 and the CO gas sensor 15 by the CO gas sensor 15. Based on the detection signal, a fire is determined in a complex manner, and an alarm for detecting CO, which is an event other than a fire, is given.

  FIG. 2 is a block diagram showing a first embodiment of the house alarm according to the present invention. The house alarm according to the first embodiment corresponds to the house alarm 10-1 installed in the bedroom of FIG. .

  The residential alarm device 10-1 as the first embodiment includes a CPU 20, and the CPU 20 has a fire sensor 22, a human sensor 14, a memory 24, a notification unit 26, an operation unit 28, a transfer unit 30, and a battery power source 32. Is provided.

  In the present embodiment, the smoke sensor 12 is provided in the fire sensor 22. As the fire sensor 22, a thermistor that detects a temperature due to a fire may be provided in addition to the smoke detector 12.

  The notification unit 26 is provided with a speaker 16 and an LED 34. The speaker 16 outputs a voice message and an alarm sound from a voice synthesis circuit (not shown). The LED 34 displays an abnormality such as a fire by blinking, blinking, or lighting.

  The operation unit 28 is provided with an alarm stop switch 18. When the alarm stop switch 18 is operated, the alarm sound flowing from the home alarm device 10-1 can be stopped. The alarm stop switch 18 is also used as an inspection switch in this embodiment. Therefore, the alarm stop switch 18 is effective when an alarm sound is output from the notification unit 26 through the speaker 16.

  On the other hand, the alarm stop switch 18 functions as an inspection switch in a normal monitoring state in which no alarm sound is output. When the inspection switch is pressed, a notification voice message or the like is output from the notification unit 26.

  The transfer unit 30 outputs a transfer signal for a fire alarm by connecting a signal line with another residential alarm. The battery power source 32 uses, for example, an alkaline dry battery having a predetermined number of cells, and as a battery capacity, a battery life of about 10 years is guaranteed.

  The CPU 20 is provided with an abnormality monitoring unit 36 as a function realized by executing the program. The abnormality monitoring unit 36 outputs a fire alarm based on a composite determination based on the smoke detection signal from the smoke sensing unit 12 and the human detection signal from the human sensor 14.

  That is, the abnormality monitoring unit 36 sets the fire detection sensitivity of the smoke detection signal from the smoke sensing unit 12 to be low when the human detection signal is obtained from the human sensor 14, while the human detection signal is obtained. When it is not set, the fire detection sensitivity by the smoke detection signal is set high. The composite fire determination using the smoke detection signal and the person detection signal in the abnormality monitoring unit 36 is executed according to the fire determination table 38 developed in the memory 24.

  FIG. 3 is an explanatory diagram showing a fire determination table used in the first embodiment of FIG. In the fire determination table 38 of FIG. 3, rules for fire determination based on the detection information of the human sensor and the detection information of the fire sensor are described.

  That is, the detection items of the human sensor 14 in the fire determination table 38 are “person detected” and “no person detected”, and serve as threshold values for fire determination as information for setting the fire detection sensitivity correspondingly. The fire detection level and fire judgment time are determined.

  The fire detection level serving as a threshold for fire determination is set to low sensitivity when there is human detection and is set to high sensitivity when there is no human detection. Specifically, the smoke concentration or temperature is set as the fire detection level as a threshold for fire determination.

  In the embodiment of FIG. 1, since the smoke detection signal by the smoke sensing unit 12 is targeted, the fire detection level is set by the smoke density, and is 8% / m for low sensitivity, and high sensitivity. In that case, the rate is 5% / m. On the other hand, when a temperature detection element such as a thermistor is used as a fire sensor, the fire detection level is set to 70 ° C. for low sensitivity and 60 ° C. for high sensitivity.

  In addition, the fire judgment time is set as a parameter for determining the detection sensitivity of the fire judgment in the fire sensor. The fire judgment time is long as T1 = 50 seconds in the case of human detection, and the detection sensitivity is lowered, and the fire judgment time T1 = 50 seconds continues after the fire is detected, and it is judged as a fire when a fire is detected. . On the other hand, when there is no human detection, the fire detection time is set to a short time of T2 = 20 seconds to increase detection sensitivity, and a fire is detected when fire detection is continued for 20 seconds after the fire detection. doing.

  FIG. 4 is a flowchart showing the fire monitoring process according to the first embodiment of FIG. 2, which is a process by the abnormality monitoring unit 36 provided in the CPU 20. In FIG. 4, when the power supply by the battery power source 32 of the residential alarm device 10-1 is started, initialization processing including hardware check and memory development of the fire determination table is executed in step S1, and there is an abnormality in step S2. If this happens, an error ends in step S3.

  If normality is discriminated in step S2, a human detection signal as data from the human sensor 14 is first read in step S4, and whether or not human detection is performed is checked in step S5. If there is human detection, the process proceeds to step S6, where a low-sensitivity fire detection level and a long fire determination time are set according to the fire determination table 38 of FIG. On the other hand, if it is determined in step S5 that there is no human detection, the process proceeds to step S7, where a highly sensitive fire detection level and a short fire determination time are set according to the fire determination table 38 of FIG.

  Subsequently, in step S8, the fire detection data from the smoke sensing unit 12, that is, the smoke detection data is read, and in step S9, the presence or absence of a fire alarm is determined. The determination of the fire alarm is performed using either the condition set in step S6 or the condition set in step S7.

  For example, in the setting of step S6, a low-sensitivity fire detection level with human detection and a long fire judgment time are set. At this time, since there are residents in the house 11, the fire detection sensitivity is set low. Even if the smoke detector 12 detects smoke from tobacco or cooking, if the smoke concentration exceeding the fire detection level 8% / m set low is not continued for the fire judgment time T11 = 50 seconds, the fire is not triggered. Non-fire reports due to cigarettes and cooking smoke can be reliably prevented.

  On the other hand, in the case of a high-sensitivity fire detection level when there is no person set in step S7 and a short fire judgment time, it is not possible to quickly take measures such as initial fire extinguishing because there is no resident for the occurrence of a fire. Since it is in the situation, the fire detection level is lowered to a high sensitivity, for example, 5% / m, and the fire judgment time is shortened to T2 = 20 seconds so that the fire can be detected at an early stage.

  When a fire alarm is determined in step S9, the process proceeds to step S10, and "Woooo, fire alarm activated" is repeatedly output from the speaker 16 of the notification unit 26. At the same time, the LED 34 blinks, for example, to notify the occurrence of a fire. If the operation of the alarm stop switch 18 is determined in step S11 with the fire alarm output being output in step S10, the alarm is stopped in step S12.

  FIG. 5 is a block diagram showing a second embodiment of the residential alarm according to the present invention. 5 is basically the same as the first embodiment of FIG. 2 and includes a CPU 20, a fire sensor 22, a human sensor 14, a memory 24, a notification unit 26, and an operation unit. 28, a transfer unit 30 and a battery power source 32 are provided.

  In the abnormality monitoring unit 40 provided in the CPU 20 of the second embodiment, the smoke detection signal from the smoke detection unit 12 provided in the fire sensor 22 belongs to any of a plurality of levels of fire levels determined in advance according to the magnitude of the signal. The alarm content is determined according to the determined fire level and the presence or absence of a human detection signal from the human sensor 14, and is output from the notification unit 26.

  An alarm control table 42 is provided in the memory 24 for alarm control using the two detection information of the smoke detector 12 and the human sensor 14.

  FIG. 6 is a block diagram showing an alarm control table used in the second embodiment of FIG. In the alarm control table 42 of FIG. 5, smoke detection signals detected from the smoke sensing unit 12, that is, smoke concentrations, are classified into four levels of levels 0, 1, 2, and 3 as fire levels in order of increasing smoke concentration. It is set.

  Here, the fire level 0 is less than 2.5% / m, which is the smoke density in the normal monitoring state. Fire level 1 has a smoke concentration of 2.5% / m or more and less than 5% / m, and it is not always possible to specify whether smoke from tobacco, cooking, or smoke from fire.

  Fire level 2 has a smoke concentration of 5% / m or more and less than 8% / m, and the possibility of smoke from fire is considerably increased. Fire level 3 has a smoke concentration of 8% / m or more, and the fire can be confirmed.

For the smoke concentrations divided into such fire levels 0 to 3, alarm control and sound pressure level are set separately with and without human detection by the human sensor 14. The alarm control based on the fire level and the detection information of the human sensor is as follows.
(1) No alarm is output when there is no human detection at fire level 0.
(2) When a person is detected at fire level 0, a theft alarm is output on the condition that the crime prevention mode is set.
(3) If there is no human detection at fire level 1, a fire warning warning is output.
(4) No alarm is output if there is a human detection at fire level 1.
(5) If there is no human detection at fire level 2, a fire alarm is output.
(6) No alarm is output when there is a human detection at fire level 2.
(7) If there is no human detection at fire level 3, a fire confirmation alarm is output.
(8) If a person is detected at fire level 3, a fire alarm is output.

  The sound pressure level of the alarm sound is “high” for the intrusion alarm with fire level 0 and human detection, and the sound pressure level “low” for the fire warning warning warning of the fire level 2. For fire alarms without fire level 2 human detection, the sound pressure level is “High”, for fire confirmation alarms without fire level 3 human detection, the sound pressure level is “High”, and for fire level 3 human detection The sound pressure level is changed from “Small” to “Large” for the fire alarm in some cases.

  The intrusion alarm in the case where the person is detected at the fire level 0 is effective when the crime prevention mode is set in the residential alarm 10-1 in FIG. In order to set the crime prevention mode, a mode switch 44 is provided on the operation unit 28.

  When the resident of the house operates the mode switch 44 provided in the home alarm device 10-1 when going out, the crime prevention mode is set by the abnormality monitoring unit 40 of the CPU 20, and in the crime prevention mode, the crime prevention mode shown in FIG. An intrusion alarm is output from the notification unit 26 when a condition with human detection is established at the fire level 0 in the alarm control table 42.

  FIG. 7 is a flowchart showing the fire monitoring process according to the second embodiment of FIG. 5, which is the process of the abnormality monitoring unit 40 provided in the CPU 20.

  In FIG. 7, when the battery power source 32 of the residential alarm device 10-1 is turned on, initialization processing including hardware check and memory development of the alarm control table 42 is performed in step S21, and then in step S22. If there is an abnormality, the error ends in step S23.

  If normality is determined in step S22, the process proceeds to step S24, and smoke detection data is read from the smoke sensing unit 12 as fire detection data. Then, it progresses to step S25, it refers to the alarm control table 42 shown in FIG. 6, and it determines whether it belongs to the fire levels 0-3 from the smoke density | concentration currently detected at this time.

  Subsequently, in step S26, detection data of the human sensor 14, that is, a human detection signal is read, and in step S27, it is checked whether or not the fire level determined in step S25 is the fire level 0. If the fire level is not 0, the process proceeds to step S28, where the alarm control and sound pressure level are determined by referring to the alarm control table 42 of FIG. 6 according to the fire level and the presence or absence of human detection, and the alarm is issued in step S29. The alarm sound according to the alarm control determined from the speaker 16 of the unit 26 is output, and at the same time, the alarm display by the LED 34 is performed. Subsequently, when the operation of the alarm stop switch 18 is determined in step S30, the process proceeds to step S31 and the alarm is stopped.

  On the other hand, when the fire level 0 is determined in step S27, that is, in the normal monitoring state where the smoke density is less than 2.5% / mem, the process proceeds to step S32, and the crime prevention mode is set. Check whether it exists. If the crime prevention mode is set, the presence / absence of human detection is checked in step S33, and if the presence of human detection is determined, an intruder alarm is output from the speaker 16 of the notification unit 26 in step S34. It will be.

  Thus, in the second embodiment of FIG. 5, it is determined which of the fire levels 0 to 3 belongs according to the smoke density from the smoke sensing unit 12 and the presence or absence of human detection by the human sensor 14, After determining the fire level, determine the alarm content by optimal alarm control according to the presence or absence of human detection, determine the appropriate sound pressure level, and output the fire alarm appropriately according to the current situation in the house be able to.

  In addition, when the crime prevention mode is set in the normal state where the smoke level is low and the smoke level is low, an intruder alarm can be output by human detection. In addition to the function as a fire alarm device, it can be used as a security alarm device on a daily basis by setting a security mode.

  FIG. 8 is a block diagram showing a third embodiment of the house alarm according to the present invention. The house alarm according to the third embodiment is intended for the house alarm 10-2 installed in the kitchen of FIG.

  In FIG. 8, the residence guard 10-2 of 3rd Embodiment provided the CO gas sensor 15 instead of the human sensor with respect to the residence guard 10-1 of 1st and 2nd embodiment, It is characterized by the above-mentioned. . That is, the home alarm device 10-2 includes a fire sensor 22, a CO gas sensor 15, a memory 24, a notification unit 26, an operation unit 28, a transfer unit 30, and a battery power source 32.

  The CO gas sensor 15 functions as an other signal detection unit that detects an event other than a fire and outputs another signal, detects the presence or absence of CO gas, and outputs a CO gas detection signal.

  The abnormality monitoring unit 46 provided as a function realized by executing the program in the CPU 20 is based on the smoke detection signal from the smoke sensing unit 12 that is a fire detection signal and the CO gas detection signal from the CO gas sensor 15 that is another signal. A fire is warned by comprehensive judgment.

  That is, when the CO gas detection signal is obtained, the abnormality monitoring unit 46 sets the fire detection sensitivity based on the smoke detection signal to be high. On the other hand, when the CO gas detection signal is not obtained, the abnormality monitoring unit 46 sets the fire detection sensitivity based on the smoke detection signal. Set low. The sensitivity setting of the fire determination by the smoke detection signal corresponding to the CO gas detection signal is set in the fire determination table 48 stored in the memory 24.

  FIG. 9 shows the fire determination table 48 of FIG. The fire determination table 48 divides the CO gas sensor into the absence of CO gas and the presence of CO gas, and determines the fire detection level and the fire determination time, which are the threshold values of the fire determination, as the detection sensitivity of the fire determination as the fire sensor.

  That is, when there is no CO gas, the fire detection level, which is the threshold for fire determination, is set to low sensitivity, and the fire determination time is set to a long time of T1 = 50 seconds. On the other hand, in the case of CO gas, the fire detection level, which is the threshold for fire determination, is set low and set to high sensitivity, and the fire determination time is set to a short time of T2 = 20 seconds.

  As for the low and high detection sensitivity at the fire judgment level, the smoke detection level is set at 8% / m for the low sensitivity fire detection level and 5% / m for the high sensitivity fire detection level. Regarding the temperature, the low-sensitivity fire detection level is 70 ° C., and the high-sensitivity fire detection level is 60 ° C.

  FIG. 10 is a flowchart showing the fire monitoring process according to the third embodiment of FIG. 8, which is a process performed by the abnormality monitoring unit 46 of the CPU 20 provided in the residential alarm 10-2 of FIG.

  In FIG. 10, when power is turned on by the battery power source 32 of the residence guard 10-2, initialization processing including hardware check and memory expansion of the fire determination table 48 is executed in step S41, and in the unlikely event that an abnormality occurs in step S42. Is discriminated, an error ends in step S43.

  If normal is determined in step S42, the data of the CO gas sensor 15 is read in step S44, and if no CO gas is detected in step S45, the low sensitivity is detected in accordance with the fire determination table 48 shown in FIG. 9 in step S46. Set fire detection level and long fire judgment time.

  On the other hand, if it is determined in step S45 that CO gas is detected, the process proceeds to step S47, where a highly sensitive fire detection level and a short fire determination time are set according to the fire determination table 48 of FIG.

  Subsequently, in step S48, smoke detection data is read from the smoke sensing unit 12 as fire detection data, and in step S49, the presence or absence of a fire alarm is determined. The determination of the fire report is a determination of the fire report based on either the low detection sensitivity when there is no CO gas set at step S46 or the high detection sensitivity when there is CO gas determined at step S47.

  When a fire alarm is determined in step S49, a fire alarm is performed in step S50 by outputting an alarm sound from the speaker 16 of the notification unit 26 and controlling the display of the LED 34. If the operation of the alarm stop switch 18 is determined in step S51 in the fire alarm output state, the alarm is stopped in step S52.

  As described above, in the third embodiment of FIG. 8, the fire is judged based on the combination of the fire detection and the CO gas detection. The detection sensitivity is lowered to prevent non-fire reports. On the other hand, if CO gas is detected, the risk of fire is high, so the fire detection sensitivity is increased so that a fire can be judged quickly. .

  FIG. 11 is a block diagram showing a fourth embodiment of a home alarm according to the present invention, and the point that a CO gas sensor 15 is provided as another signal detector is that the home police 10-2 of the third embodiment in FIG. However, it is characterized in that optimum alarm control is performed by a combined judgment of fire detection and CO gas detection.

  In FIG. 11, the configuration of the residential alarm 10-2 is the same as that of the third embodiment of FIG. 8, but an alarm control table 52 for alarm control is stored in the memory 24, and the abnormality monitoring unit 50 detects the alarm. Referring to the control table 52, it is determined whether the smoke detection signal output from the smoke sensing unit 12 belongs to a plurality of levels of fire levels determined according to the magnitude of a preset detection signal, and the determined fire The alarm content is determined according to the level and whether or not the CO gas is detected at that time, and a fire alarm and a CO gas alarm are output from the notification unit 26.

FIG. 12 shows the alarm control table 52 of FIG. The alarm control table 52 divides the fire level into four levels of level 0, level 1, level 2, and level 3 according to the increase in smoke concentration. The CO gas sensor 15 uses CO gas for each fire level 0 to 3. The alarm control and sound pressure level are determined separately for the presence and absence of CO gas. The processing contents by the alarm control table 48 are as follows.
(1) When the fire level is 0 and no CO gas is detected, no alarm is output.
(2) When CO gas is detected at fire level 0, a CO gas alarm is output.
(3) If no CO gas is detected at fire level 1, a fire warning warning is output.
(4) When CO gas is detected at fire level 1, a CO gas alarm is output.
(5) At fire level 2 and fire level 3, a fire alarm is output regardless of whether or not CO gas is detected.

  As for the sound pressure level, the sound pressure level is “low” for the fire warning warning, and the sound pressure level is changed from “low” to “high” for the fire warning when CO gas is present at fire level 3. For all other fire alarms and CO gas alarms, the sound pressure level is set to “high”.

  According to the alarm control shown in the alarm control table 52 of FIG. 12, when the presence of CO gas is detected at the fire level 0 and the fire level 1 where the smoke concentration is less than 5% / m, the residential alarm 10-2 is detected. Functions as a CO gas alarm and issues a CO gas alarm.

  For this reason, in the residence warning device 10-2 of the fourth embodiment, when the smoke concentration is low, it basically functions as a CO gas alarm device, and when the smoke concentration increases, it functions as a fire alarm device. That is, the function as a CO gas alarm and the function as a fire alarm can be made compatible with the single residential alarm 10-2.

  FIG. 13 is a flowchart showing the fire monitoring process according to the fourth embodiment of FIG. 11, which is a control process by the abnormality monitoring unit 50 of the CPU 20 provided in the residential alarm device 10-2 of FIG. 11.

  In FIG. 13, when the battery power source 32 of the residential alarm device 10-2 is turned on, the CPU 20 executes initialization processing including hardware check and memory expansion of the alarm control table 52 in step S61. Is determined, the error ends in step S63.

  When normality is determined in step S62, the process proceeds to step S64, the smoke detection data is read as the fire detection data from the smoke sensing unit 12, and the fire level 0 to 0 is referred to in the alarm control table 52 of FIG. 3 is determined.

  Subsequently, in step S66, the CO gas detection data of the CO gas sensor 15 is read. In step S67, the content of the alarm control is determined with reference to the alarm control table 52 of FIG. 12 based on the fire level and the presence / absence of CO gas detection.

  Subsequently, in step S68, it is determined whether or not there is no CO gas at the fire level 0, and if this condition is not satisfied, the control content is such that an alarm is output. Therefore, the process proceeds to step S69, and the alarm control determined in step S68. Alarm output according to This alarm output includes a CO gas alarm that is performed when the fire level is 0 or 1 and CO gas is present.

  If the operation of the alarm stop switch 18 is determined in step S70 during alarm output, the alarm is stopped in step S71. On the other hand, if the fire level is 0 and there is no CO gas in step S68, the alarm output is not performed and the process returns to step S64 and the same processing is repeated.

  In the above-described embodiment, the residential alarm device 10-1 provided with the smoke detector 12 and the human sensor 14 and the residential alarm device 10-2 provided with the smoke detector 12 and the CO gas sensor 15 are taken as examples. As another embodiment, the smoke detection unit 12, the human sensor 14 and the CO gas sensor 15 are provided as another embodiment, and the three detection information are judged in combination, and the fire alarm, theft alarm, and the CO gas alarm are detected. May be issued. In this case, for example, fire determination and alarm control are performed in combination with logical detection of person detection and CO gas detection and fire detection.

  In the above embodiment, the combined judgment and alarm control of fire are performed using the fire judgment tables 38 and 48 and the alarm control tables 42 and 52. However, the fire judgment conditions are programmed without using the table structure. You may make it judge by describing as a rule.

  In addition, the above embodiment has been taken as an example of a resident guard that is connected to a signal line to another resident alarm and can be transferred, but includes a wireless communication unit and communicates with the other resident alarm by wireless communication. It is good also as a resident alarm which performs an interlocking alarm between.

  Moreover, although said embodiment took the embodiment which provided the sensor part integrally with the apparatus main body as an example, the alarm device which provided the sensor part as a different body may be sufficient.

  Moreover, in the above embodiment, the case where the fire level for alarm control is divided into four levels of fire levels 0 to 3 is taken as an example. It may be divided into stages.

The present invention includes appropriate modifications that do not impair the objects and advantages thereof, and is not limited by the numerical values shown in the above embodiments.

10-1, 10-2: House alarm 12: Smoke detector 14: Human sensor 15: CO gas sensor 16: Spiece 18: Alarm stop switch 20: CPU
22: Fire sensor 24: Memory 26: Notification unit 28: Operation unit 30: Transfer unit 32: Battery power supply 34: LED
36, 40, 46, 50: Abnormality monitoring unit 38, 48: Fire determination table 42, 52: Alarm control table 44: Mode switch

Claims (5)

A fire detection unit that detects a fire and outputs a fire detection signal;
A CO gas sensor that detects CO gas and outputs a CO gas detection signal;
A notification unit for outputting an alarm;
Based on the fire detection signal and the CO gas detection signal, an abnormality monitoring unit that outputs an alarm including a fire and a gas leak from the notification unit;
With
The abnormality monitoring unit sets a high fire detection sensitivity based on the fire detection signal when the CO gas detection signal is obtained, and sets a fire detection sensitivity based on the fire detection signal when the CO gas detection signal is not obtained. An alarm device characterized by low detection sensitivity.
2. The alarm device according to claim 1, wherein the abnormality monitoring unit sets a threshold value for judging a fire based on the fire detection signal when the CO gas detection signal is obtained, thereby obtaining the CO gas detection signal. An alarm device characterized by setting a threshold value for judging a fire based on the fire detection signal when the fire detection signal is not set.
2. The alarm device according to claim 1, wherein the abnormality monitoring unit sets a short time for judging a fire based on the fire detection signal when the CO gas detection signal is obtained, thereby obtaining the CO gas detection signal. An alarm device characterized by setting a long time for judging a fire by the fire detection signal when the fire detection signal is not set.
The alarm device according to claim 1, wherein
The abnormality monitoring unit determines which of the fire levels set in a plurality of stages according to the magnitude of the fire detection signal, and according to the determined fire level and the presence or absence of gas leak detection by the CO detection signal An alarm device characterized in that an alarm content is determined and output from the notification unit.
  5. The alarm device according to claim 4, wherein the abnormality monitoring unit performs alarm control based on a combination of the plurality of levels of fire levels and presence / absence of gas leak detection.

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