JP2014182534A - Alarm system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To appropriately perform fire determination to provide an alarm, without detection delay or a false alarm, even when performing differential type fire determination in which a temperature rise rate is obtained with an alarm unit, on the basis of the measured temperature of a temperature measuring chip, to be compared with a threshold.SOLUTION: Temperature measuring chips 10-1-10-3 are set at and near a sofa, a heater, and a trash box to transmit temperature measurement signals to an alarm unit 100. The alarm unit 100 performs fire determination (differential type fire determination), in the case of a temperature rise rate of a measured temperature having a predetermined threshold or more, to provide an alarm. The alarm unit 100 corrects a temperature rise rate, detected based on measurement sensitivity, with a predetermined correction coefficient based on the assumption of a temperature rise in setting environment of the temperature measuring chips, and compares the corrected temperature rise rate with the threshold to perform fire determination. When a slow temperature rise associated with fire is assumed, the alarm unit 100 corrects the temperature rise rate by multiplying it by a correction coefficient more than 1, compares it with the predetermined threshold to perform fire determination, and thereby preventing delay in fire determination.

Description

  The present invention relates to an alarm system that measures the temperature of devices and places installed in a monitoring area in a spot manner to detect and warn of an abnormality leading to a fire.

  2. Description of the Related Art Conventionally, alarm devices that detect and warn of an abnormality such as a fire in a house have become widespread. Of these, residential fire alarms are referred to as residential alarms.

  In such a house alarm device, it is operated by a battery power source, and is integrally provided with a sensor unit for detecting a fire and an alarm unit for alarming a fire. When a fire is detected from a detection signal of the sensor unit, a predetermined pattern is generated from the alarm unit. Because the fire alarm sound is output and notified, and fire monitoring and alarm notification can be performed with a single residential alarm without the need for a fire receiver as in the so-called automatic fire alarm system, installation is simple and cost-effective. It is also inexpensive and has become widespread with the mandatory installation in ordinary houses.

  In addition, by communicating between multiple home alarms, when a fire alarm sound is output from any home alarm, an interlocked home police that outputs a fire alarm sound in conjunction with other home alarms. The device has also been put into practical use and is widely used (Patent Document 4).

JP 2007-094719 A Utility Model Registration No. 3143139 JP 2011-170877 A JP 2009-140236 A

  However, places where fires occur are places using fire such as various stoves, gas stoves, etc. or places where waste is used by smoking etc. or waste bins, etc. In order to detect fires early, these places However, the current house alarm and other fire alarms are installed, for example, on the ceiling surface or the upper part of the wall surface overlooking the entire room as the monitoring area. There is no spot-on-site monitoring of potential fires and nearby locations.

  As a method of spotting a fire in such a place, for example, a temperature sensor may be installed at a monitoring target device or a monitoring target place (or its vicinity) to detect a fire and output a fire detection signal. It ’s fine. However, in order to detect and alarm a fire, an alarm unit that performs an acoustic alarm or display is required in addition to a sensor unit that uses a temperature sensor. It will be placed directly in the place to monitor the fire, the cost will be high and practical application is difficult.

  In addition, the residential alarm is installed in a place where it is easy to detect a fire in consideration of convection of smoke or hot air flow, for example, the ceiling surface or the upper part of the wall surface, but the sensor unit, alarm unit, and various operation units are integrated. Therefore, the location suitable for the installation of the sensor unit is not necessarily the installation of the alarm unit or the operation unit, for example, it is difficult to operate because the operation unit is not reachable because it is installed at a high place There was also a problem that it was not consistent with the place suitable for.

  In order to solve such a problem, the applicant of the present application operates a battery, detects a temperature, transmits a temperature measurement chip, and warns when a fire is judged from an assumed temperature received from the temperature measurement chip. Proposes an alarm system consisting of alarming devices. Since the temperature measuring chip does not have an alarm function, it can be reduced in size and weight, and it is also inexpensive. In addition to being installed on the ceiling surface or upper wall of the room, there is a possibility of fire by placing a temperature measuring chip on a bed or sofa where there is a possibility of a fire, such as a heating device such as a stove, a garbage can, a smoking area, or a nearby area. It is possible to monitor.

  By the way, in such an alarm system, the measured temperature transmitted from the temperature measuring chip is received by the alarm device, compared with a predetermined threshold temperature, and when the temperature is equal to or higher than the threshold temperature, a so-called constant temperature alarm is performed. The fire judgment of the ceremony is performed.

  However, when the temperature measuring chip is installed in or near a place where there is a possibility of fire, for example, when it is installed in a heating device, the temperature measured by the temperature measuring chip increases with the use of the heating device, and the heating exceeds the threshold temperature. There is a problem that a non-fire report is issued from the alarm when it becomes a state.

  In order to solve the problem of the constant temperature fire determination, it is conceivable to perform a so-called differential fire determination in which a fire is determined when a temperature rise exceeding a predetermined temperature is detected per unit time. According to the differential fire judgment, for example, even if a heating device with a temperature measuring chip is heated to a temperature higher than room temperature due to its use, a temperature rise that can be judged as a fire is caused in a short time. No, non-fire reports can be prevented.

  However, when a temperature measurement chip is installed at or near a place where there is a possibility of fire, and a differential fire judgment is made with an alarm, the situation of the fire that occurs at or near the place where the temperature measurement chip is placed Depending on the situation, even if it is a fire, the temperature rise per unit time necessary for the differential fire judgment does not occur, and it is assumed that the time delay until the fire is judged becomes large.

  For example, when a sofa with a temperature measuring chip is smoldering internally due to cigarette fire, the temperature rise by the temperature measuring chip is relatively slow, and the smoldering state continues to ignite. In this case, it is assumed that the measured temperature rises rapidly and the fire has spread when the fire is judged and alarmed.

  In addition, when a temperature measuring chip is placed in or near the heating equipment, the measured temperature rises when the heating equipment starts to be used, and a non-fire report is issued if this temperature rise rate is higher than the threshold for judging a fire. is there.

  The present invention appropriately determines a fire without issuing a detection delay or a non-fire report even if a differential fire judgment is performed by obtaining a temperature rise rate from a measured temperature of a temperature measuring chip and comparing it with a threshold value. It is an object to provide an alarm system and a fire monitoring method that enable an alarm.

(Alarm system A)
A temperature measuring chip for measuring and transmitting the temperature;
An alarm device for detecting a temperature increase rate of the measured temperature received from the temperature measuring chip, and determining a fire when the temperature increase rate is equal to or greater than a predetermined threshold, and outputting a fire alarm;
In an alarm system with
The alarm device is characterized in that the fire detection sensitivity is changed by correcting the temperature rise rate with a predetermined correction coefficient.
(Alarm system B)
The present invention
One or a plurality of temperature measurement chips installed in a predetermined monitoring area, measuring the temperature and transmitting a temperature measurement signal including the measurement temperature;
An alarm device that detects a temperature increase rate based on the measured temperature of the temperature measurement signal received from the temperature measurement chip, and judges a fire when the temperature increase rate is equal to or greater than a predetermined threshold, and outputs a fire alarm;
In an alarm system with
The alarm device shall determine a predetermined correction coefficient in advance assuming the temperature rise in the installation environment of the temperature measurement chip, and determine the fire by correcting the temperature increase rate detected from the measured temperature of the temperature measurement signal with the correction coefficient. It is characterized by.
(Correction coefficient)
Here, the alarm device preliminarily sets a predetermined correction coefficient exceeding 1 assuming a slow increase in temperature due to the occurrence of a fire in the installation environment of the temperature measuring chip, and a correction temperature obtained by multiplying the temperature increase rate by the correction coefficient. A fire is judged when the rate of increase is above a threshold.

  In addition, the alarm device predetermines a predetermined correction coefficient that is less than 1 assuming a temperature increase due to a cause other than a fire in the temperature measurement chip installation environment, and a correction temperature increase rate obtained by multiplying the temperature increase rate by the correction coefficient. A fire is judged if is greater than or equal to the threshold.

(Basic effect)
According to the present invention, a predetermined correction coefficient for correcting the temperature increase rate is determined in advance assuming temperature increase in the installation environment of the temperature measuring chip, and the temperature rises when the measured temperature from the temperature measuring chip is received by the alarm device. When the rate is detected, the temperature rise rate is corrected by a predetermined correction coefficient (detection sensitivity is changed), and when the corrected temperature rise rate is equal to or greater than the threshold, a fire is judged and an alarm is generated. Even if the temperature rise due to the temperature varies depending on the installation environment of the temperature measurement chip, it is possible to make an appropriate judgment using a differential system that suppresses a delay in fire judgment and non-fire reports.

(Effect to suppress fire judgment delay)
For example, when a temperature measuring chip is installed in or near a sofa or bedding where the temperature rises slowly due to a fire, for example, the sofa or bedding continues to smolder in the initial stage of the fire, the measurement temperature It can be assumed that the rise in the market is slow. In this case, a correction coefficient exceeding 1 is set, and a temperature increase rate (corrected to high detection sensitivity) corrected by multiplying the temperature increase rate detected from the measured temperature by a correction coefficient exceeding 1 is obtained and compared with a threshold value. By doing so, the corrected temperature increase rate reaches a threshold value at an early stage, and a fire can be determined, and a fire determination delay can be suppressed.

(Effects to suppress non-fire reports)
Further, when the temperature measuring chip is installed in or near the heating device, it is possible to assume an increase in the temperature of the installation environment due to a cause other than a fire with the start of use of the heating device. In this case, a correction coefficient of less than 1 is set, and a corrected temperature increase rate (corrected to a low detection sensitivity) obtained by multiplying the temperature increase rate detected from the measured temperature by a correction coefficient of less than 1 is compared with the threshold value. By doing so, the non-fire report can be suppressed by preventing the corrected rate of temperature increase from reaching the threshold value.

The block diagram which showed schematic structure of the alarm system by this invention The block diagram which showed the structure of the temperature measurement chip | tip used with the system of FIG. Block diagram showing the configuration of the alarm used in the system of FIG. Explanatory drawing which showed the fire judgment control by the alarm control part of FIG. Explanatory drawing which showed an example of the correction coefficient set to the alarm control part of FIG. Explanatory drawing which showed other embodiment of this invention which interlock | cooperates an alarm device Block diagram showing the structure of a linked alarm

[Outline of alarm system]
FIG. 1 is an explanatory diagram showing a schematic configuration of an alarm system according to the present invention, taking a case where it is installed in a living room as an example.

  In FIG. 1, the alarm system of the present invention includes a plurality of temperature measurement chips 10-1 to 1-4 and an alarm device 100. The temperature measurement chip 10-1 is disposed on the sofa 1, the temperature measurement chip 10-2 is disposed on the heating device 2, the temperature measurement chip 10-3 is disposed on the trash can 3, and the temperature measurement chip 10-4 is on the upper wall surface. It is installed in. The alarm device 100 is arranged at a wall surface position where the resident's hand can easily operate.

  The temperature measurement chips 10-1 to 10-4 measure the temperature of the installation environment, and transmit a temperature measurement signal including the measurement temperature to the alarm device 100 through the communication path a. The alarm device 100 detects the rate of temperature rise from the measured temperature received from the temperature measuring chips 10-1 to 10-4, and issues a fire alarm when a fire is judged.

  Hereinafter, the temperature measurement chips 10-1 to 10-4 are collectively referred to as the temperature measurement chip 10 without being distinguished from each other.

[Temperature measurement chip]
FIG. 2 is a block diagram showing the configuration of the temperature measuring chip. The temperature measurement chip 10 includes a measurement control unit 12, a temperature detection element 13, a first communication unit 14 connected to an antenna 14a, and a display unit 16, and operates with a battery power source (not shown). The measurement control unit 12 uses a computer circuit or a wired logic circuit provided with a CPU, a memory, various input / output ports, and the like.

  The temperature detection element 13 uses, for example, a thermistor whose resistance value changes according to the temperature of the installation environment.

  The first communication unit 14 transmits / receives a signal to / from the alarm device 100 according to a predetermined first communication protocol in response to an instruction from the measurement control unit 12. As the first communication protocol, for example, a short-range communication protocol for a sensor network using a frequency of 950 to 957 MHz assigned to RFID (Radio Frequency IDentification “abbreviation of individual identification by radio wave”) is used.

  The display unit 16 includes a display element such as an LED and its drive circuit.

  The measurement control unit 12 is a function realized, for example, by executing a CPU program. For example, based on a control instruction from the alarm device 100, the measurement control unit 12 measures the temperature of the installation environment from the detection signal of the temperature detection element 13, and sends a temperature measurement signal including the measurement temperature from the first communication unit 14 to the alarm device. 100 is transmitted.

  That is, the alarm device 100 transmits a batch AD conversion signal to the temperature measurement chip 10 at predetermined intervals. Upon receiving this, the measurement control unit 12 performs AD control to read the detection signal of the temperature detection element 13 after AD conversion and measure the temperature. Subsequently, the alarm device 100 transmits a polling signal specifying the address of the temperature measurement chip 10. Upon receiving this, the measurement control unit 12 performs control to transmit a temperature measurement signal to the alarm device 100.

  By such temperature measurement using the batch AD conversion signal and the polling signal from the alarm device 100 and transmission of the temperature measurement signal, signal collision in reception on the alarm device 100 side of the temperature measurement signals transmitted from the plurality of temperature measurement chips 10 is detected. The timing of temperature measurement by the plurality of temperature measurement chips 10 can be matched.

  Note that the temperature measurement chip 10 may measure the temperature every predetermined period and transmit the temperature to the alarm device 100 without depending on the instruction from the alarm device 100. In this case, in order to avoid a collision with a temperature measurement signal transmitted from another temperature measurement chip, carrier sense is performed and the temperature measurement signal is transmitted at a timing when there is no carrier.

[Alarm]
(Alarm configuration)
FIG. 3 is a block diagram showing the configuration of the alarm device. In FIG. 3, the alarm device 100 includes an alarm control unit 101, a first communication unit 102 connected to an antenna 102a, a notification unit 104, and an operation unit 105, and is operated by a battery power source (not shown). The alarm control unit 101 uses a CPU, a memory, a computer circuit provided with various input / output ports, a wired logic circuit, or the like.

  The first communication unit 102 receives an instruction from the alarm control unit 101 and transmits / receives a signal to / from the temperature measurement chip 10 according to the first communication protocol described above.

  The notification unit 104 includes, for example, a speaker, an LED, and respective drive circuits, and outputs an alarm sound from the speaker according to an instruction from the alarm control unit 102 as necessary, and displays an alarm by the LED. The operation unit 105 includes various switches including an alarm stop switch that receives an operation for stopping an alarm sound and / or an alarm display, and a correction coefficient setting switch that receives an operation for setting a correction coefficient for sensitivity control.

  The alarm control unit 101 is a function realized by, for example, execution of a program by the CPU, and executes differential fire determination control.

(Alarm fire control)
FIG. 4 is an explanatory diagram of the fire determination control executed by the alarm control unit 101 of FIG. 3, the functional configuration is shown in FIG. 4 (A), and how to determine the correction coefficient used for this fire determination control is shown in FIG. 4 (B). FIG. 4C shows the correction information shown in the table format and stored in the memory.

  4A, the fire determination control function includes a temperature rise rate detection unit 201, a correction coefficient setting unit 202, a correction unit 203, a threshold setting unit 204, and a fire determination unit 205.

  The temperature increase rate detection unit 201 detects the temperature increase rate based on the measured temperature from the temperature measurement chip 10. The temperature increase rate is a value obtained by dividing the temperature difference between the measured temperatures measured at a predetermined cycle by the cycle.

The correction coefficient setting unit 202 holds a predetermined correction coefficient determined on the assumption of a temperature increase in the installation environment of the temperature measurement chip 10, and corrects the detected temperature increase rate with this correction coefficient. The correction coefficient is set according to the following rules.
(1) A correction coefficient exceeding 1 is determined on the assumption that the temperature rises slowly due to the occurrence of a fire in the installation environment of the temperature measuring chip 10.
(2) A correction coefficient of less than 1 is determined assuming a temperature rise due to a cause other than a fire in the installation environment of the temperature measuring chip 10.

  FIG. 4B shows how to determine the correction coefficient based on the rules (1) and (2). As the installation environment of the temperature measurement chip 10, it is assumed that the sofa, the heating device, the trash can, and the upper part of the wall surface in FIG. 1 are installed.

  Assuming that the temperature rises due to the occurrence of a fire by applying the rule (1) for such an installation environment, the sofa continues to be smoldered with fibers in the initial stage of the fire, and then the so-called burning fire that leads to ignition Can be assumed. For this reason, since it takes time to increase the temperature due to a fire, a “slow increase” is assumed.

  In this case, the rate of temperature increase based on the measured temperature shows a low value, and it takes time to determine a fire if it is left as it is. Therefore, a value exceeding 1 is set as the correction coefficient K1, and correction is performed by multiplying the temperature increase rate detected from the measured temperature by the correction coefficient K1, thereby suppressing a fire determination delay.

  As for the trash can, a temperature rise due to a fire similar to that of a sofa can be assumed, so a “slow rise” is assumed and a correction coefficient K3 having a value exceeding 1 is assumed.

  The correction coefficients K1 and K3 that are greater than 1 when the assumed temperature rise is “slow rise” may be the same value or different depending on the installation environment. For example, when the time of smoldering fire is long, the value of the correction coefficient is increased, and when the time of smoldering fire is short, the value of the correction coefficient is decreased.

  As for the heating equipment, when the use of the heating equipment is started, the temperature rises, and if it is left as it is, there is a possibility that the temperature rise rate detected from the measured temperature exceeds a predetermined threshold value and the non-fire report is judged. Therefore, “heating rise” is assumed as a temperature rise due to a cause other than a fire according to rule (2). In this case, a correction coefficient K2 of less than 1 is set, and the temperature rise rate is multiplied by the correction coefficient K2 to make it lower. To prevent non-fire reports.

  For the upper part of the wall surface, neither rule (1) nor (2) is applicable, so “temperature increase” is assumed as the temperature increase due to the fire. The “standard increase” is a temperature increase corresponding to, for example, two types of sensitivity defined in the standard of the differential fire detector.

  The differential spot type sensor has two types of sensitivity. As a linear ascending operation test, “When a horizontal air flow that rises linearly at a rate of 15 ° C./min from room temperature is applied, a fire signal is detected within 4.5 minutes. "Send" This is about 3.3 (° C./min) as the temperature rise rate, and this is the standard rise. Note that with one type of sensitivity, the temperature increase rate is about 2.2 (° C./min), and this may be used as a standard increase.

  When the assumed temperature rise accompanying the occurrence of a fire is “standard rise”, the correction coefficient K4 is set to K4 = 1, and the temperature rise rate detected from the measured temperature is used as it is for the fire judgment.

  As shown in FIG. 4C, the correction coefficient setting unit 202 holds correction coefficient information in which correction coefficients K1 to K4 are arranged corresponding to the addresses A1 to A4 of the temperature measurement chips 10-1 to 10-4 ( Memory).

  The correction unit 203 multiplies the temperature increase rate output from the temperature increase rate measurement unit 201 by the corresponding correction coefficient output from the correction coefficient setting unit 202, and outputs a correction temperature increase rate.

  The threshold setting unit 204 sets a predetermined threshold used for differential fire judgment. As this threshold value, a value corresponding to the temperature increase rate of the above-described type 1 sensitivity or type 2 sensitivity is used.

  The fire determination unit 205 compares the corrected temperature increase rate output from the correction unit 203 with a predetermined threshold value output from the threshold setting unit 204, determines a fire when the correction temperature increase rate is equal to or greater than the threshold value, and determines the fire determination result. Based on this, a voice message is output from the speaker of the notification unit 104 in FIG. 3, and the LED is turned on, blinking, or flickering to perform a fire alarm notification output.

(Example of installation location and correction factor)
FIG. 5 is an explanatory diagram showing an example of the correction coefficient set in the fire determination control of FIG. 4 in a table format, and shows the installation location and correction coefficient when installed in a house. In FIG. 5, the ceiling surface, the upper part of the wall, the living room, the main bedroom without smoking, the staircase, and the vacant rooms, which are the installation locations, are assumed to rise in temperature due to the occurrence of a fire, and the correction factor K is set to K = 1. Then, the temperature rise rate detected from the measured temperature is directly compared with a predetermined threshold value to determine a fire.

  Since the lower part of the wall surface is less susceptible to thermal airflow due to the occurrence of a fire than the upper part of the wall surface, the temperature rise due to the fire is assumed to be a slow rise, and for example, K = 1.1 is set as a correction coefficient K exceeding 1. The predetermined threshold value is multiplied by the correction coefficient K = 1.1 to increase it, and a fire is judged by comparing the corrected temperature increase rate with the predetermined threshold value.

  In the main bedroom with sofa, bed, trash can and smoking, assuming that the temperature rise due to the fire is a slow rise, set a correction factor K exceeding 1, for example K = 1.2, and the temperature rise detected from the measured temperature The rate is increased by a correction coefficient K = 1.2, and this correction temperature rise rate is compared with a predetermined threshold value to determine a fire.

  For children's rooms and elderly living rooms, it is assumed that the temperature rise due to the occurrence of a fire is a slow rise, but because it is a weak person, a correction factor exceeding 1 is required to detect fires as soon as possible and to take measures such as evacuation For example, a larger value such as K = 1.5 is set.

  For heating equipment and kitchens, it is assumed that there is a rise in temperature due to a cause other than a fire. As a correction factor K of less than 1, for example, K = 0.8 is set and the rate of temperature rise detected from the measured temperature is set. The correction coefficient K is multiplied by 0.8 to make it low, and this correction temperature rise rate is compared with a predetermined threshold value to determine a fire.

  In addition, the correction coefficient with respect to the installation location of FIG. 5 is an example, and it does not prevent setting an appropriate correction coefficient according to the situation of fire occurrence or the temperature rise of the installation location.

[Alarm system processing]
In FIG. 1, the alarm device 100 transmits a batch AD conversion signal to the temperature measurement chips 10-1 to 10-4 at a predetermined cycle, for example, one minute cycle, and subsequently the addresses of the temperature measurement chips 10-1 to 10-4 are sent. Transmit polling signals specified in sequence.

  When the temperature measurement chips 10-1 to 10-4 receive the batch AD conversion signal effectively, the temperature measurement chip 10-1 to 10-4 measures the environmental temperature of the installation location, and measures the temperature including the measurement temperature according to the effective reception of the polling signal designating the self-address. A signal is transmitted to the alarm device 100. The effective reception means that the address indicating the destination of the received signal matches the self address, and other codes and data can be received correctly.

  The alarm device 100 that has received the temperature measurement signals from the temperature measurement chips 10-1 to 10-4 effectively receives, for example, the temperature measurement rate of the temperature measurement chip 10-1 in the temperature rise rate detection unit 201 in FIG. The temperature rise rate is detected as the temperature difference from the current measured temperature. The correction coefficient setting unit 202 outputs a correction coefficient K1 corresponding to the address A1 of the temperature measurement chip 10-1. The correction unit 203 multiplies the temperature increase rate by the correction coefficient K1 and outputs the corrected temperature increase rate to the fire determination unit 205. The fire determination unit 205 compares the correction temperature increase rate with a predetermined threshold value from the threshold setting unit 204. If the threshold is exceeded, a fire is judged and a fire alarm is output by voice message and LED display.

[Alarm interlock]
FIG. 6 is an explanatory view showing another embodiment of the alarm system according to the present invention, and is characterized in that alarm devices installed in each room of the house are interlocked.

  In FIG. 6, for example, alarm devices 100-1 to 100-4 are installed in a monitoring area such as a house separately for each room, and a monitoring group G1 corresponding to each of the alarm devices 100-1 to 100-4. ~ G4 is formed, and the temperature measurement chips 10-11 to 10-13, 10-21 to 10-23, 10-31 to 10-33, 10-41 to 10-43 are arranged in the monitoring groups G1 to G4. Yes.

  Hereinafter, the alarm devices 100-1 to 100-4 and the temperature measurement chips 10-11 to 10-43 are collectively referred to as the alarm device 100 and the temperature measurement chip 10 without being distinguished from each other.

  The temperature measuring chip 10 is the same as that shown in FIG. As shown in FIG. 7, in order to communicate with other alarm devices, the alarm device 100 has a second communication unit 107 connected to an antenna 107a added to FIG. .

  The 2nd communication part 107 transmits / receives a fire interlocking signal between other alarm devices according to a predetermined 2nd communication protocol. For example, STD-30 (a low power security system radio station radio equipment standard) or STD-T67 (a low power security system radio station standard) known as a standard for a specific low power radio station in the 400 MHz band is used for transmission and reception of interlocking signals according to the second communication protocol. Compliant with specified low-power radio station telemeter, telecontrol and data transmission radio equipment standards).

  The temperature measurement chip 10 and the alarm device 100 effectively transmit / receive a signal only when belonging to the same monitoring group, as indicated by the communication path a, by including the monitoring group code in a signal to be transmitted / received as indicated by the communication path a.

  In addition, the alarm devices 100-1 to 100-4 form an interlocking group. When the alarming devices 100-1 to 100-4 belong to the same interlocking group as shown by the communication path b by including the interlocking group code in the interlocking signal transmitted and received. Only the interlocking signal can be received effectively.

  When the alarm control unit 101 determines a fire by the fire determination function of FIG. 4A, the alarm control unit 101 outputs a fire alarm as a link source and transmits a fire link signal from the second communication unit 107 to another alarm device. Control is performed to output a fire alarm indicating the link destination with other alarm devices.

  Moreover, the alarm control part 101 shows an interlocking destination from the alerting | reporting part 114, when the effective reception of the fire interlocking signal which any of the other alarm devices 100-2 to 100-4 transmitted by the 2nd communication part 107 is detected. Control is performed to output a fire alarm sound and display an alarm indicating the interlocking destination.

  The alarm control unit 101 performs control to stop the fire alarm sound output and the alarm display indicating the link source from the notification unit 104 when the fire recovery or alarm stop operation is detected during the output of the fire alarm, and the fire recovery. Other alarm devices that perform control to transmit the interlock signal or the alarm stop interlock signal from the second communication unit 107 to the other alarm devices 100-2 to 100-4 and receive the fire recovery interlock signal or the alarm stop interlock signal 100-2 to 100-4 stop the fire alarm sound output and alarm display indicating the interlocking destination.

[Modification of the present invention]
(Change of correction coefficient)
In the above embodiment, when an alarm system is installed, a predetermined correction coefficient is set based on the installation location of the temperature measurement chip, for example, as in the example of FIG. 5, but the alarm system is being used. In addition, the correction coefficient can be changed as necessary. For example, when a non-fire report is issued due to a cause other than a fire, the correction coefficient K set at that time is changed by performing a predetermined operation indicating that the non-fire report has been issued. A change is made to decrease by a predetermined unit correction coefficient ΔK, for example, ΔK = 0.1.

(Temperature measurement)
Further, in the above embodiment, the batch AD conversion signal and the polling signal are transmitted from the alarm device to the temperature measurement chip and the temperature measurement signal is received, but the temperature measurement is not performed according to the instruction from the alarm device. The chip may autonomously transmit a temperature measurement signal every predetermined period.

(Communication protocol)
In the above embodiment, the communication between the interlocking alarm device and the temperature measurement chip is in accordance with the first communication protocol, and the alarm device is in communication with the second communication protocol. The same communication protocol and different channels may be used. If it does in this way, it is not necessary to provide a 1st communication part and a 2nd communication part in an alarm device, and a structure can be simplified as one communication part.

  Further, the communication between the alarm device and the temperature measurement chip may not be wireless, and may be wired communication or a combination of wired and wireless as appropriate.

(Use)
Moreover, the above-described embodiment is applicable not only to residential use but also to monitoring temperature abnormalities for various uses such as buildings and offices.

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

10, 10-1 to 10-4, 10-11 to 10-43: Temperature measurement chip 12: Measurement control unit 13: Temperature detection element 14, 102: First communication unit 100, 100-1 to 100-4: Alarm Device 101: Alarm control unit 104: Notification unit 105: Operation unit 107: Second communication unit 201: Temperature increase rate detection unit 202: Correction coefficient setting unit 203: Correction unit 204: Threshold setting unit 205: Fire determination unit

Claims (4)

A temperature measuring chip for measuring and transmitting the temperature;
An alarm device for detecting a temperature increase rate of the measured temperature received from the temperature measuring chip, and determining a fire when the temperature increase rate is equal to or greater than a predetermined threshold, and outputting a fire alarm;
In an alarm system with
The alarm system is characterized by changing the fire detection sensitivity by correcting the temperature rise with a predetermined correction coefficient.
One or a plurality of temperature measurement chips installed in a predetermined monitoring area, measuring the temperature and transmitting a temperature measurement signal including the measurement temperature;
An alarm device that detects a temperature increase rate based on a measurement temperature of a temperature measurement signal received from the temperature measurement chip, and judges a fire when the temperature increase rate is equal to or greater than a predetermined threshold, and outputs a fire alarm;
In an alarm system with
The alarm device predetermines a predetermined correction coefficient assuming temperature rise in the installation environment of the temperature measurement chip, and corrects the temperature increase rate detected from the measured temperature of the temperature measurement signal with the correction coefficient to fire. An alarm system characterized by judging.
3. The alarm system according to claim 2, wherein the alarm device predetermines a predetermined correction coefficient exceeding 1 on the assumption of a gradual increase in temperature due to the occurrence of a fire in an installation environment of the temperature measuring chip, An alarm system, wherein a fire is judged when a corrected temperature increase rate obtained by multiplying a temperature increase rate by the correction coefficient is equal to or greater than the threshold value.
  3. The alarm system according to claim 2, wherein the alarm device predetermines a predetermined correction coefficient that is less than 1 assuming a temperature rise caused by a cause other than a fire in an installation environment of the temperature measuring chip, A warning system, wherein a fire is judged when a corrected temperature increase rate obtained by multiplying an increase rate by the correction coefficient is equal to or greater than the threshold value.

Images