JP2006048211A - Fire alarm system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To sharply shorten time required for the automatic test of a fire sensor under an instruction from a receiver. <P>SOLUTION: Fire sensors 3-1 to 3-4 equipped with an automatic test part for executing a test operation under an instruction from a test instructing part 14 of the receiver 1 are connected to sensor circuits 2-1 to 2-3 pulled out of a receiver 1. The test instructing part 14 of the receiver 1 instructs the start of a test to one fire sensor, and instructs the start of a test to another fire sensor before the test ends. The fire sensors equipped with the automatic testing functions are connected to the sensor circuits 2-1 to 2-3 extracted by every system from the receiver 1, and a test instructing part 14 instructs the start of a test to a certain fire sensor, and instructs the start of a test to another fire sensor connected to the signal circuit of the identical system or another system before the test ends. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a fire alarm system that monitors a fire by connecting a plurality of fire detectors to a signal line drawn from a receiver, and in particular, performs a test by automatically testing a fire detector according to a test instruction from a receiver. It is related with the fire alarm system which responds a result.

  Conventionally, in the fire alarm system known as P type, a plurality of fire detectors are connected to the sensor line drawn from the receiver, and the alarm signal from the fire detector is received for each line. The fire is alarmed.

  On the other hand, in the fire alarm system known as the R type, a terminal device such as a repeater or an analog fire detector having a transmission function is connected to the transmission line drawn from the receiver, and when a fire is detected, for example, Based on the fire interrupt from the terminal device, issue the search command to identify the address of the terminal device that was issued, display the fire occurrence address, and collect and monitor the fire data from the identified terminal device Yes.

In such a fire alarm system, an automatic test function is provided in the fire detector, and an automatic test is performed in response to an instruction from the receiver. The system is guaranteed to be reliable because it can detect the failure of the detector and display a warning of the failure at the receiver and replace the failure detector appropriately.
JP-A-5-6493 JP-A-7-230585 JP-A-6-274780

  However, in such a conventional fire alarm system, when an automatic test of a fire detector is performed according to an instruction from a receiver, after the automatic test of one fire detector is completed, An automatic test was performed, and there was a problem that it took too much time.

  FIG. 20 is an outline of a conventional fire alarm system. A signal line 112 is drawn from a receiver 110 into, for example, three systems of A system, B system, and C system, and fire detectors 111 with automatic test functions are respectively provided. Multiple connections are made.

  As shown in the time chart of FIG. 21, the automatic test of such a conventional fire alarm system is, for example, when four fire detectors 111 are connected to each system. Automatic tests are performed one by one in the order of addresses 1 to 4 for the B system and addresses 1 to 4 for the C system.

  For example, in the case of an R-type fire alarm system, automatic testing of such fire detectors starts automatic testing by sending test commands, sampling and holding test detection data by sample commands, fire judgment by sampling multiple times, polling commands It takes several seconds for the automatic test of one fire detector to respond to the test detection data by the test, and the response of the test report by the polling command when it is determined that the fire is detected by the test detection data. Even in a medium-sized system, the number of fire detectors connected to the receiver is several hundreds, so there is a problem that it takes more than 30 minutes to automatically test the fire detectors of the entire system.

  In this regard, the number of fire detectors connected to the receiver in the P-type fire alarm system is similarly several hundreds. Therefore, there is a problem that it takes a considerable time to automatically test the fire detectors of the entire system.

SUMMARY OF THE INVENTION An object of the present invention is to provide a fire alarm system that can significantly reduce the time required for an automatic test of a fire detector performed by an instruction from a receiver.

  In order to achieve this object, the present invention is configured as follows.

  The present invention relates to a fire detector having an automatic test unit that executes a test operation on a signal line drawn from a receiver or a repeater according to an instruction from a test command unit of the receiver or the repeater and responds to a test result. In the fire alarm system connected to, the test command unit of the receiver or repeater instructs the start of the test to another fire detector before instructing the start of the test to a certain fire detector. It is characterized by doing.

  Here, the receiver or repeater connects the fire detector having an automatic test function to the signal line drawn separately for each system, and the test instruction unit starts the test to a certain fire detector. Before starting the test after instructing it, instruct other fire detectors connected to the same system signal line to start the test.

  The receiver or repeater connects a fire detector with an automatic test function to the signal line drawn separately for each system, and the test command section instructs a fire detector to start the test. Before the test ends, other fire detectors connected to other system signal lines are instructed to start the test.

  In addition, the receiver or repeater is connected to the fire detector with an automatic test function connected to the signal line drawn separately for each system, and the test command unit instructs a fire detector to start the test. Before the test ends, other fire detectors connected to the same system signal line are instructed to start the test, and other fire detectors connected to other system signal lines are instructed. Instruct the start of the test.

  When the present invention is a P-type system, the fire detector used in the present invention is an on-off fire that switches between signal lines drawn from a receiver or a repeater when a fire is detected to flow an alarm current. It is a sensor, and the receiver is a receiver or a repeater that detects the fired current of the signal line by the fire sensor and warns the occurrence of a fire on a signal line basis.

  The test command section of the receiver or repeater outputs a test voltage signal to the fire detector connected to the test line drawn from the receiver or repeater to perform the test operation in sequence, and the alarm current generated by the test. Is detected as a normal sensor, and when no alarming current is received from the test, it is determined as a fault sensor and a forced recovery voltage signal is output to the signal line.

  In addition, the fire detector's automatic test unit receives the test voltage signal from the test command unit and performs a test operation. When the test is triggered, the test voltage signal is output to the next fire detector and the test is performed. When the alarm is not issued, the forcible restoration voltage signal from the test command section is received to restore the test operation and the test voltage signal is output to the next fire detector.

  When the present invention is an R-type system, the fire detector used in the present invention is a fire detector having a data transmission function for sampling and responding to detection data based on a command from the receiver. Sends a sample command to all fire detectors at regular intervals to sample the detection data, then sends a polling command specifying the detector addresses in sequence to respond to the sampled detection data and fire. It is a receiver that judges.

  In addition, the test command section of the receiver sends a test command specifying an address to the fire detector to perform a test operation, and then sends a sampling command to sample the test detection data obtained by the test operation, Subsequently, a polling command specifying an address is transmitted, and a fire determination response is made by test detection data and a test operation, and then a test end command is transmitted.

Furthermore, the automatic test unit of the fire detector receives the test command specifying the self-address from the test command unit, performs the test operation, and then receives the sampling command and samples the test detection data obtained by the test operation. Next, it receives a polling command specifying its own address and responds with test detection data. Further, it receives a polling command specifying its own address and judges a fire from the test detection data and issues a test report. respond.

  According to the present invention, the test operation of a plurality of fire detectors can be performed in parallel by starting the test of another fire detector before starting and ending the test on a certain fire detector. The time required for automatic testing of fire detectors can be greatly reduced.

  For example, if automatic testing of two fire detectors is performed in parallel, the test time can be shortened to about half of the conventional time, and the number of fire detectors performing automatic testing in parallel can be increased. Can be shortened.

In addition, when signal lines are drawn separately for each system, independent automatic testing is possible for each system, so by performing automatic tests sequentially or simultaneously in parallel for each system, multiple Even in the case of the system, the automatic test for all systems can be completed in the same time as the automatic test for one system is performed in parallel.

  FIG. 1 is a block diagram of a P-type fire alarm system to which the present invention is applied. In FIG. 1, the detector lines 2-1, 2-2, 2-3 are drawn out from the receiver 1, and the fire detectors 3-1, 3-2, 3-4 each having an automatic test unit are terminated. The resistor R is connected together. As the fire sensors 3-1 to 3-4 connected to the sensor lines 2-1 to 2-3, various fire sensors such as a smoke sensor and a heat sensor can be connected.

  In this embodiment, in order to simplify the description, an example is shown in which four fire detectors 3-1 to 3-4 are connected from the receiver 1 to the detector lines 2-1 to 2-3. However, in an actual P-type fire detection and notification facility, there are, for example, 32 fire detectors that can be connected to one sensor line, and the system of sensor lines that can be connected to the receiver 1 Becomes a large-scale system such as 20 systems.

  From the receiver 1, test lines 4-1, 4-2 and 4-3 are drawn out. The test lines 4-1 to 4-3 are composed of a test line T and a loopback line LB. For example, taking the test line 4-1 as an example, the test line T functions as an automatic test unit provided in the four fire detectors 3-1 to 3-4 connected to the sensor line 2-1. It is connected to the inspection circuit which will be clarified later.

  The receiver 1 is provided with an MPU 5. An operation unit 8, an alarm display unit 9, a district display unit 10, a transfer output unit 11, and a memory 12 are provided for the MPU 5. On the sensor line side of the MPU 5, receiving circuit sections 6-1, 6-2 and 6-3 are provided for each line, and the sensor lines 2-1 to 2-3 are drawn out, respectively. Test control units 7-1, 7-2, and 7-3 are provided on the sensor line side of the MPU 5, and test lines 4-1, 4-2, and 4-3 are drawn out, respectively.

  The receiving circuit units 6-1 to 6-3 receive the alarm current transmitted by the fire alarms of the fire detectors 3-1 to 3-4 connected to the sensor lines 2-1 to 2-3. Then, the notification reception signal is output to the MPU 5. Corresponding to the reception circuit units 6-1 to 6-3, the MPU 5 is provided with a reception control unit 13 as a function by program control.

  The reception control unit 13 sequentially reads out the alarm reception signals of the reception circuit units 6-1 to 6-3, discriminates the fire in units of lines, and performs alarm display, that is, fire representative display and district display (reporting line display). .

  The test control units 7-1 to 7-3 receive a test instruction from the test command unit 14 provided as a program control function in the MPU 5, and output a test voltage signal of 24 V, for example, to the test line L. For example, taking the test control unit 7-1 as an example, when the test control unit 7-1 outputs a test voltage signal of 24V to the test line T of the test line 4-1, this test voltage signal is first sent to the fire detector. The inspection circuit as an automatic test unit provided in the fire detector 3-1 is operated, and a test operation as a pseudo fire detection corresponding to the fire detection operation is performed.

  When the fire detector 3-1 issues a test report by the test operation, an alarm signal is output to the sensor line 2-1 as in the case of fire detection, and this is received by the receiving circuit unit 6-1 and sent to the MPU 5. By outputting, the test command unit 14 of the MPU 5 determines that the first fire detector 3-1 of the sensor line 2-1 has normally issued a test.

  When a test report is issued by the fire detector 3-1 and the test operation is completed normally, the inspection circuit of the fire detector 3-1 switches the switch to bypass the test line 4-1 based on the test report. As a result, a test voltage signal of 24V is supplied to the next fire detector 3-2, and an automatic test is performed. When the last fire detector 3-4 performs a normal test operation, a test voltage signal is sent to the loopback line LB, which returns to the test control unit 7-1, thereby causing the test line 4-1. The test completion of the four connected fire detectors 3-1 to 3-4 can be confirmed. Note that the test operation of the fire detectors 3-1 to 3-4 by the test control unit 7-1 is continuously performed a plurality of times.

  In the test command section 14 of the present invention, the fire detectors 3-1 to 3-1 connected to the sensor lines 2-1 to 2-3 drawn out into three systems of A system, B system, and C system. For 3-4, for example, before initiating the test to the fire detectors 3-1 to 3-4 of the A system of the sensor line 2-1, before the test is completed, The fire detectors 3-1 to 3-4 connected to the sensor line 2-2 are instructed to start the test.

  That is, in the test operation, the test command unit 14 first instructs the test control unit 7-1 to start the test, and then instructs the test control unit 7-2 to start the test before the test ends. The test control unit 7-2 instructs the test control 7-3 to start the test before the test ends. As a result, the test operations of the fire detectors 3-1 to 3-4 by the test control units 7-1 to 7-3 are executed in parallel.

Also, the fire detector test by the test command unit 14
(1) At power-on start by turning on the receiver 1,
(2) Regular tests at regular intervals, for example, once a day,
(3) Performed by any of the inspection operations during the maintenance test.

  FIG. 2 is a circuit block diagram showing an embodiment of the fire detector with an automatic test function of FIG. 1, taking a scattered light type smoke detector as an example. In FIG. 2, the fire detector 3 includes a rectifying circuit / noise absorbing circuit 15, a switching circuit 16, a constant voltage / current limiting circuit 17, an operation indicator lamp 24, a control circuit unit 18, an oscillation circuit 19, a light emitting element 20, and a light receiving element 21. And an amplifier circuit 22 and a comparator circuit 23.

  Here, the rectifier circuit / noise absorption circuit 15 makes the current between the lines L and C nonpolar by using, for example, a diode bridge, a Zener die auto, a capacitor, and further suppresses noise. The constant voltage / current limiting circuit 17 limits the supply current to the subsequent circuit portion for preventing overcurrent on the lines L and C to a constant value.

  During normal monitoring, the light emitting element 20 is pulse-driven by the oscillation circuit 19 to emit light periodically. When smoke is generated by a fire, the light from the light emitting element 20 is scattered, converted into a photocurrent by the light receiving element 21, amplified by the amplifier circuit 22, and then input to the comparison circuit 23.

  When the input signal exceeds the specified value, the comparison circuit 23 counts in the control circuit unit 18 in synchronization with the light emitting element 20, and outputs a fire alarm signal to the switching circuit 16 when the predetermined count number is reached. .

  The switching circuit 16 performs switching based on the fire alarm signal from the control circuit unit 18, and transmits a fire alarm signal to the receiver 1 by flowing a alarm current between the lines L and C.

  The fire detector 3 is provided with a test switch unit 25 and an inspection circuit 27 in order to realize an automatic test function. The test switch unit 25 includes a resistor R1, a range star Q1, a resistor R2, and a test light emitting element 26. The test switch unit 25 inputs a test voltage signal from the inspection circuit 27, turns on the transistor Q1, and drives the test light emitting element 26 to emit light. I am doing so.

  Light from the test light-emitting element 26 is directly incident on the light-receiving element 21 as test light, and artificially creates a light-receiving state of scattered light corresponding to a pre-alarm determined to be a fire by the test light.

  The inspection circuit 27 includes switch circuits 28 and 29, an alarm detection circuit 30, and a forced recovery circuit 31. When the switch circuit 28 connects the input test line Tin from the receiver 1 side and receives the 24V test voltage signal output from the receiver 1 side, the switch circuit 28 outputs the test voltage signal to the test switch unit 25 and turns on the transistor Q1. By turning on the test light-emitting element 26, the test operation is performed.

  If the test switch unit 25 operates normally, the light reception signal from the light receiving element 21 by the test light is amplified by the amplifier circuit 22 and compared with the specified value by the comparison circuit 23. When the received light signal exceeds the specified value, the comparison circuit 23, and when the control circuit 18 counts the predetermined number of times by the oscillation circuit 19, the alarm detection signal accompanying the test is output to the switching circuit 16 in the same manner as when a fire is detected. Switch between L and C and send fire alarm signal to receiver to detect test alarm.

  The output of the switching circuit 16 that has output the fire alarm signal by the test is given to the alarm detection circuit 30 of the inspection circuit 27. When the alarm detection circuit 30 detects the test alarm, the switch circuit 29 is operated. The test signal voltage of 24V applied to the switch circuit 28 is output to the output test line Tout for the next fire detector.

  When the test report detection is performed by the report detection circuit 30, this detection output is also given to the switch circuit 28, the output of the test voltage signal from the switch circuit 28 to the test switch unit 25 is stopped, and the fire detector 3 Stop the test operation.

  The forced recovery circuit 31 performs a forced recovery when the test notification is not normally performed by the test operation by the test switch unit 25. This forcible recovery is performed based on time monitoring by a timer provided in the test instruction unit 14 provided in the MPU 5 of the receiver 1. That is, in the test command unit 14 of the receiver of FIG. 1, the timer is started simultaneously with the start of the fire detector test, and if there is a test report within the set time of the timer, the timer is reset and restarted. If there is no test report before the set time is reached, it is determined that the fire detector being tested is faulty, and a forced recovery voltage signal of, for example, 33V is sent from the test control unit to the test line T of the test line. Output.

  When the forced restoration circuit 31 determines the forced restoration voltage signal output from the receiver 1, the switch circuits 28 and 29 are operated in the same manner as in the test notification, and the input 24V test voltage signal is supplied to the switch circuit 28, 29. In addition to sending out to the next fire detector via 29, the output of the test voltage signal to the test switch unit 25 is stopped.

  FIG. 3 is a time chart of an embodiment of an automatic test operation of the fire detector by the test command unit 14 provided in the MPU 5 of FIG.

  3, the system of the sensor line 2-1 in FIG. 1 is the A system, the system of the sensor line 2-2 is the B system, the system of the sensor line 2-3 is the C system, and each sensor line 2 The four fire detectors 3-1 to 3-4 connected to -1 to 2-3 are shown as addresses 1 to 4, respectively. The addresses 1 to 4 are set for convenience of explanation, and the addresses are not actually assigned to the fire detectors.

  In FIG. 3, the test command unit 14 first outputs a test voltage signal of 24 V to the A system, and therefore, the automatic test of the first fire detector 3-1 indicated by the address 1 is started from time t1. This automatic test is performed by the inspection circuit 27 and the test switch unit 25 shown in FIG. 2. When the test operation is normally performed and the test is issued, the automatic test at the address 1 is completed, and the next address 2 is checked. An automatic test of the fire detector 3-2 is performed, and the automatic test of the fire detectors 3-3 and 3-4 at addresses 3 and 4 is performed in the same manner.

  On the other hand, the test command unit 14 instructs the system A to start the test at time t1, and at the same time before the test of the system A ends, outputs a test control voltage of 24V to the system B at time t2 and starts the test. Let As a result, the sensor lines 3-1 to 3-4 indicated by the addresses 1 to 4 connected to the sensing line 2-2 of the B system sequentially perform automatic tests.

  Further, the test command unit 14 outputs a test voltage signal of 24V to the sensor line 2-3 which becomes the C system at the time t3 before the end of the test of the B system, and the sensor lines 3-1 to 3-1 indicated by addresses 1 to 4 are provided. 3-4 The automatic test is performed.

  After instructing the start of a test for one system for a system determined by such a sensor line, before starting the test, instruct the next system to start the test. Test operations can be performed, and the total test time can be greatly reduced.

  FIG. 4 is a time chart of another embodiment of the automatic test operation of the fire detector by the test command unit of FIG. 1, and the test command unit 14 performs the test operation for all of the A system, the B system, and the C system at time t1. It is characterized by instructing the start of. If the start of the test is instructed simultaneously for all the systems in this way, the overall test time can be further shortened compared to the case where the start of the test is instructed sequentially as shown in FIG.

  FIG. 5 is a time chart of the test operation by the inspection circuit 27 provided in the fire detector 3 of FIG. 5, when a test command signal is output from the test command unit 14 of the receiver 1 at time t1 as shown in FIG. 5A, a test voltage of 24V with respect to the test line T as shown in FIG. A signal is output.

  With this 24V test voltage signal, the fire detector at address 1 first issues a test report at time t2, and then a recovery operation is performed. At the timing of this recovery operation, the timer provided on the receiver side is reset and restarted.

  When the sensor at address 1 is restored, the test voltage signal of 24V is supplied to the next fire sensor at address 2 and is restored after the test is issued at time t3. Next, it is assumed that after the test voltage signal of 24V is supplied to the fire detector at address 3 and the test operation is started, the test notification is not performed due to the sensor failure.

  In this case, at time t4 when the set time T has elapsed, the forced recovery signal of 33V is output to the test line T superimposed on the 24V test voltage signal shown in FIG. This forcibly restores the fire detector at address 3 that did not issue the test, and a test voltage signal of 24 V is supplied to the fire detector at the next address 4.

  When the fire detector at address 4 performs a normal test operation and performs test notification and recovery operations at times t5 and t6, the receiver 1 loops at the timing of the recovery operation as shown in FIG. The loopback voltage is returned by the back line LB, whereby the receiver 1 recognizes that one sensor test operation is completed, and sets the test operation a plurality of times, so that the automatic test from the next address 1 is performed in the same manner. Will be done.

  FIG. 6 is a flowchart of receiver processing for the receiver 1 of FIG. In FIG. 6, after the power is turned on, the initial setting is performed in step S1, the presence or absence of the test is checked in step S2, and the line alarm is monitored in step S3 when the test is normal. If line notification is determined, the process proceeds to step S4, where a representative fire display and a district display corresponding to the line are performed. After the fire alarm process, the fire recovery process is checked in step S5. When the fire recovery process is performed, the process returns to step S2 to monitor the line notification in steps S2 and S3.

  On the other hand, when a power-on start associated with power-on of the receiver 1 is performed in step S2 when a periodic test such as once a day or a test based on a switch operation during maintenance inspection is determined in step S6, the process proceeds to step S6. As shown in the time chart, the test start is instructed redundantly for a plurality of line systems.

  FIG. 7 is a flowchart of the test control process in step S6 of FIG. In FIG. 7, the test command unit outputs a test voltage to the test line T in step S1 via the test control unit, and starts a timer in step S2. Subsequently, whether or not there is a test report is checked in step S3. If there is a test report, it is determined as a normal sensor in step S10.

  If there is no test report in step S3, the arrival of the set time is checked in step S4. If there is no test report even if the set time is reached, the process proceeds to step S5, and the forced recovery voltage signal is set. Output to the test line T and forcibly restore the fire detector during the test operation. In step S6, the sensor currently being tested is discriminated as a fault sensor.

  When the determination of the normal sensor in step S10 or the determination of the failure sensor in step S6 is completed, the loopback response by the loopback line LB is checked in step S7. If there is no loopback response, the process proceeds to step S2. Then, the timer is started again to perform test control for the second fire detector.

  When the test of the last fire sensor output to the sensor line is completed, a signal voltage of 24V is received from the loopback line LB. Thus, the loopback response is determined in step S7 and set in step S8. The number of tests is checked, and if the set number of tests has not been reached, the process returns to step S2 to perform the test operation from the beginning. If the set number of tests has been reached, the process proceeds from step S8 to step S9, the output of the test voltage is stopped, and the series of test controls is terminated.

  The automatic test function of the fire detectors 3-1 to 3-4 provided in the P-type fire alarm system of FIG. 1 is taken as an example of the automatic test by the inspection circuit 27 of FIG. The invention is not limited to this, and an appropriate automatic test unit can be used as long as the fire detectors connected to the same sensing line can be sequentially tested by a test signal from the receiver 1. The test signal sent from the receiver 1 to the fire detector may be sent to each fire detector via a sensing line.

  FIG. 8 is a block diagram of an R-type fire alarm system to which the present invention is applied. In FIG. 8, analog fire detectors 42-1, 42-2,..., 42-4 are terminated for transmission lines 41-1, 41-2, and 41-3 drawn from the receiver 40, respectively. A resistor R is connected.

  In the embodiment of FIG. 8, in order to simplify the explanation, the transmission lines 41-1 to 41-3 are drawn out from the receiver 40 as the A system, the B system, and the C system for three systems, and the analog system is used for each system. The case where four fire detectors 42-1 to 42-4 are connected to each other is taken as an example. Of course, in an actual R-type system, an appropriate number of transmission lines are drawn out from the receiver 40 as a plurality of systems, and the number of analog fire detectors that can be connected to each system is an address that can be set in the analog fire sensor. For example, 127 units can be connected.

  In the embodiment of FIG. 8, an analog fire detector is taken as an example of the terminal, but in addition to this, an on / off fire detector having a transfer function by address setting is connected to the sensor line. It is also possible to connect a control repeater that connects a control load to a control line, such as a device repeater or a district bell smoke control device.

  The receiver 40 is provided with an MPU 48, and an operation unit 51 alarm display unit 52, a district display unit 53, a transfer output unit 54, and a memory 55 are provided for the MPU 48. On the transmission line side of the MPU 48, transmission units 50-1, 50-2, 50-3 are provided in units of the transmission lines 41-1 to 41-3, and the analog fire detector 42- Information necessary for fire monitoring and test control is exchanged with 1-42-4.

  The MPU 48 of the receiver 40 is provided with a call control unit 56, an interrupt processing unit 57, and a test command unit 58 that are executed by program control. Correspondingly, on the analog fire detector side, as shown by the analog fire detector 42-1 of the transmission line 41-1, a call response unit 44, an interrupt control unit 45, and a test control unit 46 are provided. Is provided.

  The call control unit 56 of the receiver 40 sets a series of terminal addresses for each terminal for each of the transmission paths 41-1 to 41-3. For example, 127 addresses of addresses 1 to 127 can be used. The call control unit 56 of the receiver 40 performs polling for sequentially calling terminals at regular intervals using a polling command including a terminal address and transmitting terminal information as a response.

  The polling command from the call control unit 56 of the receiver 40 is received by the call response unit 44 of the fire detector 42-1, and when a matching match between the call address included in the polling command and its own terminal address is obtained. Then, the terminal information held in the memory is transmitted to the receiver 40 as a terminal response signal.

  Here, the polling command transmitted from the receiver 40 to the terminal includes a command field, an address field, and a checksum. The response signal from the terminal is composed of a data field and a checksum. The transmission format of the polling command and response signal can take an appropriate configuration as necessary.

  Further, the call control unit 56 of the receiver 40 samples a detection signal by AD conversion for all the terminals at a constant period and holds them in the memory at the same time regardless of the polling process specifying the terminal address. (Batch AD conversion command) is transmitted. This sampling command (batch AD conversion command) is transmitted at intervals of 1 second, for example.

  When the call response unit 44 of the analog fire detector 42-1 determines the sampling command from the receiver 40, the detection signal from the fire detection unit at that time is AD-converted and stored in the memory as detection data. The detection data stored in the memory is sent back as terminal data of a response signal to the polling command specifying the terminal address from the receiver 40. Note that the present invention is not limited to collective collection of detection signals by a sampling command, and the detection signals may be returned as terminal data in real time when a call signal is received.

  The interrupt control unit 45 provided in the analog fire detector 42-1 receives a fire occurrence when a fire is determined from detection data obtained by AD conversion of a detection signal detected based on a sampling command from the receiver 40. An interrupt signal is sent to inform the machine 40 immediately. Transmission of the interrupt signal by the interrupt control unit 45 is performed by transmitting a break signal that destroys the response signal transmitted from any of the terminals at the response timing to the polling command from the call control unit 56 of the receiver 40. Is called.

  Here, the polling command from the receiver 40 to the analog fire detector side is sent in the voltage mode, while the response signal from the terminal to the receiver 40 is sent in the current mode. Therefore, the interrupt control unit 45 sends a break signal that destroys the response signal transmitted from any of the terminals at the timing of the terminal response signal to the transmission line as a current signal.

  The interrupt processing unit 57 provided in the receiver 40 receives the interrupt signal from the terminal when receiving a specific signal such as all 1 that cannot be obtained by the normal terminal response signal at the timing of the terminal response signal. In order to obtain the details of the cause of the interrupt, an interrupt confirmation request command is transmitted.

  In response to the interrupt request confirmation command, the interrupt control unit 45 of the analog fire detector 42-1 sends back detailed interrupt information. The interrupt processing unit 57 of the receiver 40 that has acquired the detailed interrupt information from the terminal starts a group search for identifying the terminal that has transmitted the interrupt signal. Group search divides the terminal address into predetermined groups, issues a search command for each group, identifies the group that includes the terminal where the fire was detected, and if the group can be identified, the terminals in the group are sequentially Call and identify the terminal that detected the fire. In addition to this, this group search may be performed by a bisection method or the like.

  Further, in the receiver 40 of FIG. 8, a test command unit 58 is provided in the MPU 48, and a test control unit 46 is provided in the analog fire detector 42-1 correspondingly. The test command unit 58 of the receiver 40 is used at the time of power-on start by turning on the receiver 40, for example, at a regular timing such as once a day, and also at the time of a test instruction by the operation unit 51 at the time of maintenance inspection. Test operations necessary for automatic testing of the analog fire detectors 42-1 to 42-4 are performed.

  The test command unit 58 first transmits an interrupt prohibition command prior to the transmission of the test command to the terminal, and transmits an interrupt prohibition release command when confirming the end of the test on the terminal side. When the test control unit 46 of the analog fire detector 42-1 receives the interrupt prohibition command from the receiver 40, the test control unit 46 prohibits the interrupt signal transmission function by the interrupt control unit 45.

  When the interrupt prohibition command is received, the interrupt signal transmission function of the interrupt control unit 45 in the prohibited state is restored. For this reason, even if the test control unit 46 of the analog fire detector 42-1 performs a test operation in response to a test command from the receiver 40 and a pseudo fire detection signal is obtained, an interrupt signal from the interrupt control unit 45 is obtained. Will never be sent.

  The test data obtained by the test operation is A / D converted based on the sampling command from the call control unit 56 of the receiver 40, stored in the memory, and when the test data exceeds a predetermined fire level, The test report is transmitted to the receiver 40 as terminal response data in response to the polling command from the receiver 40, and the test command unit 58 confirms that the test operation has been normally performed by receiving the test report. . If no test report is received, the test command unit 58 displays a terminal failure display on the alarm display unit 52, assuming that a normal test operation has not been performed.

  When the test report of the analog fire sensor 42-1 is confirmed by the polling command, the test command unit 58 determines that the test of the analog fire sensor 42-1 is completed, and the analog fire sensor 42-1 Specify the terminal address and send the test recovery command and interrupt prohibition release command.

  Further, in the test command unit 58 of the present invention, when performing an automatic test of a plurality of analog fire detectors, another analog fire detector is detected before a test is finished after an analog fire detector is instructed to start the test. Instruct the vessel to start the test. As a result, the test operations of a plurality of analog fire detectors are performed in parallel, and the time required for testing all the analog fire detectors can be shortened.

In the R-type fire alarm system of FIG. 8, the transmission paths 41-1 to 41-3 are drawn out into three systems of A system, B system, and C system. Perform one of the test operations.
(1) Before starting the test after instructing a certain analog fire detector to start the test, instruct other analog fire detectors connected to the transmission line of the same system to start the test.
(2) Before starting the test after instructing a certain analog fire detector to start the test, instruct another analog fire detector connected to the transmission path of another system to start the test.
(3) Before instructing a certain analog fire detector to start the test and before the end of the test, instruct other analog fire detectors connected to the same system transmission path to start the test, Instruct other analog fire sensors connected to the transmission line to start the test.

  FIG. 9 is a block diagram showing an embodiment of the analog fire detectors 42-1 to 42-4 of FIG. 8, taking an analog smoke detector as an example.

  In FIG. 9, the analog fire sensor 42 includes a sensor base 42a and a sensor body 42b. An alarm indicator lamp circuit 60 is provided on the sensor base 42a, and signal lines from the receiver 40 are connected to the terminals S and C. The sensor main body 42b is provided with a noise absorbing circuit 62 and a transmission signal detecting circuit 63 following the rectifying circuit 61 for making it nonpolar. The transmission signal detection circuit 63 detects a call signal in the voltage mode from the receiver 40 and outputs it to the transmission control circuit 66.

  The transmission control circuit 66 is provided with an MPU, and the functions of the call response unit 44, the interrupt control unit 45, and the test control unit 46 shown in the analog fire detector 42-1 in FIG. 8 are realized by program control. . A type address setting circuit 67 is provided for the transmission control circuit 66.

  The smoke detection unit includes a light emission drive circuit 68, a light emitting element 69 using an infrared LED, a light receiving element 70 using a photodiode, and an amplifier circuit 71. The light emitting element 69 is arranged by a scattered light type smoke detection structure, for example. Further, a test light emitting element 72 is provided, and a test operation is performed by directly irradiating the light receiving element 70 with light corresponding to a predetermined smoke density.

  The transmission signal from the transmission control circuit 66 is given to the response signal output circuit 64, and the normal response signal is transmitted to the receiver 40 side in the current mode. For the interrupt signal based on fire detection, a break current signal is output so that the response signal is all 1 on the receiver side. When the transmission control circuit 66 receives the sampling command from the receiver 40, the light emission driving circuit 68 drives the light emitting element 69 to emit light, and AD conversion is performed on the light reception signals obtained from the light receiving element 70 and the amplification circuit 71 and stored in the memory. Hold.

  The analog detection data stored and held in the memory of the transmission control circuit 66 is transmitted as response signal data when a polling command designating an address from the receiver 40 is obtained. When the transmission signal detection circuit 63 receives a test command from the receiver 40, the light emitting drive circuit 68 drives the test light emitting element 72.

  The detection signals obtained from the light emitting element 70 and the amplification circuit 71 by the light emission driving of the test light emitting element 72 are stored and held in the memory of the transmission control circuit 66 as detection data by AD conversion based on the sampling command from the receiver 40, The test data or the test report result is put in the response signal to the polling command by the calling signal designating the self address, and transmitted to the receiver 40.

  Further, when the fire is determined from the analog detection data sampled by AD conversion based on the sampling command, the transmission control circuit 66 transmits an interrupt signal to the receiver 40 at a response timing to the calling signal.

  Since the interrupt prohibition command is sent prior to the test command during the test operation, the interrupt signal is transmitted even if the analog detection data obtained by AD conversion in the test operation exceeds the fire level. No transmission of the embedded signal is performed. When the test operation is completed, the test operation is stopped in response to a test recovery command from the receiver 40, and then the interrupt signal transmission function is restored in response to an interrupt disable command.

  FIG. 10 is a time chart of an embodiment of an automatic test operation for the analog fire detector by the test command unit 58 provided in the receiver 40 of FIG. FIG. 10 shows the analog fire detectors 42-1 to 42-4 of the A system, the B system, and the C system in FIG. 8 as addresses 1 to 4, respectively.

  In the test operation by the test command unit 58 in FIG. 10, first, the test command is transmitted by designating the address 1 of the analog fire detector 42-1 connected to the transmission line 40-1 which is the A system, and the test operation is performed. . Of course, an interrupt disable command is transmitted prior to the transmission of the test command.

  The test operation of address 1 is performed by transmitting the test command, and the test command is issued by designating the address 2 of the next analog fire detector 42-2 before the test operation is completed. Similarly, the test command for address 3 is issued before the test for address 2 is completed, and the test command for address 4 is issued before the test for address 3 is completed. Subsequently, for the B system and the C system, the test command for the next address is sequentially issued before the test for the preceding address is completed.

  FIG. 11 is a time chart of another embodiment of the test operation for the analog fire detector by the test command unit 58 provided in the receiver 40 of FIG. The test operation of FIG. 11 is characterized in that the test operation is performed sequentially for each of the A system, the B system, and the C system.

  In the test operation of FIG. 11, first, the test operation is started by designating the analog fire detector 42-1 of address 1 of the A system and issuing a test command. Subsequently, the test is started by issuing a test command to the analog fire detector 42-2 of address A of system A before the end of the test of address 1. At the same time, a test command is issued to the analog fire detector 42-1 of the B system address 1 to start the test.

  That is, in FIG. 11, the test of the analog fire detector of address 2 of the same A system starts before the end of the test of the analog fire sensor of address 1 of the A system, and the B system as another system. The test of the analog fire detector at address 1 is started.

  When the test is started at the time t1 for the analog fire detector of the B system address 1, the test is started for the analog fire sensor of the C system address 1 at the time t3 before the end of the test. The test is also started for the analog fire detector at address 2. Similarly, the test of the next address is started before the test of the preceding address between the systems and in the same system is completed.

  FIG. 12 is a time chart of another embodiment of the test operation of the analog fire detector by the test command unit 58 provided in the receiver 40 of FIG. The embodiment of FIG. 12 is characterized in that in the A system, the B system, and the C system, the test is started at the same timing for the same address.

  That is, in FIG. 11, the test operation is started sequentially for the same addresses of the A system, the B system, and the C system, for example, as shown at time t1, time t2, and time t3 for address 1. In this case, the test is started at the same time t1 for the addresses 1 of the A system, the B system, and the C system, and the test is started before the end of the test of the preceding address for the addresses 2, 3, and 4 in each system. .

  FIG. 13 is a time chart showing the normal monitoring processing operation between the receiver 40 in FIG. 8 and the analog fire detectors 42-1 to 42-4 connected to the transmission line 41-1 as the A system. is there.

  The receiver 40 transmits a sampling command (batch AD conversion command) 80 as shown in FIG. 13 (A), and analog fire detection in which addresses 1 to 4 are set as shown in FIGS. 13 (B) and 13 (C). Samples 81-1 to 81-4 are performed in which the fire detection signals are simultaneously sampled by AD conversion and stored in the memory by the units 42-1 to 42-4.

  Subsequently, the receiver 40 sequentially transmits polling commands 82-1, 82-2, 82-3, and 82-4 that specify addresses 1, 2, 3, and 4, and in response to this, the analog fire detector 42-1. ˜42-4 transmit the detection data stored in the memory as response data 83-1, 83-2, 83-3, 83-4 to the receiver 40 when it is determined that the address matches the self address. . This is repeated in the same manner.

  FIG. 14 is a time chart showing the processing operation when a fire occurs in FIG. As shown in FIG. 14B, when the fire determination 84 is made from the result of the sampling 80-1 corresponding to the sampling command 80 of the receiver 40 by the analog fire detector 42-1, the response to the polling command 82-1 is made. An interrupt 85 is performed to transmit an interrupt signal as a break signal so that the reception data at the receiver 40 becomes all 1 at the timing.

  In order to prevent non-fire information, the fire detector determines that a fire has occurred when the output value sampled by the sampling command 81-1 continuously exceeds a predetermined threshold value a predetermined number of times, and transmits an interrupt signal.

  In the receiver 40 that has received this interrupt 85, a group search command 86 is transmitted at the next polling timing, and the interrupt 87 is performed by the group response in the analog fire detector 42-1 that has determined a fire. Is called.

  Upon receiving this group response interrupt 87, the receiver 40 transmits a search command 88 within the group at the timing of the polling command, and in response to this, the analog fire detector 42-1 determines that an analog fire has been detected. Interruption 89 is performed as an intra-group response for responding from the device 42-1. By this interruption 89, the receiver 40 recognizes that the analog fire detector 42-1 has transmitted the interruption signal, and can perform a representative fire display, a district display indicating a fire occurrence area, and the like.

  FIG. 15 is a time chart when the test command unit 58 provided in the receiver 40 of FIG. 8 performs a test operation in parallel with two analog fire detectors. In FIG. 15, a test command is transmitted simultaneously at time t1 for the A system, the B system, and the C system. For example, when the A system is taken as an example, for the address 1 where the test is first started, The test at the next address 2 is started before the end of the test, and two analog fire detectors are being tested in parallel.

  When the test for address 1 and address 2 is completed, the test for address 3 is started next, and the test for address 4 is started before the test for address 3 is completed. Two fire detectors are being tested in parallel. This also applies to the B system and the C system. On the other hand, in the case of the time chart of FIG. 12, it can be said that the test operations of the four analog fire detectors are performed in parallel for the A system, the B system, and the C system.

  FIG. 16 is a time chart of the test operation in the R-type fire alarm system of FIG. 8 in the case where the test operations of two analog fire detectors for the same system are performed in parallel as shown in FIG. First, as shown in FIG. 16A, the receiver 40 continuously issues test commands 90 and 92 specifying address 1 and address 2 at the start of the test.

  A test start 90 is performed by the analog fire detector 42-1 shown in FIG. 16B by the test command 90 designating the address 1, and the analog fire sensor 42 shown in FIG. 16C is conducted by the test command 92 designating the address 2. The test start 93 is performed at -2. In an actual test operation, an interrupt disable command is transmitted prior to the test command, but is omitted here.

  When the test starts 91 and 93 are performed in the analog fire detectors 42-1 and 42-2 by the test commands 90 and 92, the analog fire detectors 42-1 to 42 are received in response to the sampling command 80 from the next receiver 40. -4 is sampled by AD conversion of the detection signal. This sampling is performed for the analog fire detectors 42-1 and 42-2 at addresses 1 and 2 at which the test starts 91 and 93, respectively. 1, 94-2.

  Subsequently, in response to the polling command 82-1 designating the address 1, the analog fire detector 42-1 performs a test response 95-1 for transmitting the test data stored and held in the test sampling 94-1. In response to the polling command 82-2 designating the next address 2, the analog fire detector 42-2 makes a test response 95-2. Hereinafter, sampling of the test data and test response by the sampling command 80 and the polling commands 82-1, 82-2,... During the test are repeated.

  When the test report 96 is judged by the analog fire detector 42-1 at the address 1 after the test time has elapsed, a test report response 97-1 is returned to the polling command 81-1. Similarly, when the test report 98 is obtained by the analog fire sensor 42-2 at address 2, a test report response 97-2 is returned to the polling command 81-2.

  Subsequently, the process proceeds to FIG. 17, and the receiver 40 that receives the alert responses 97-1 and 97-2 by the test of FIG. 16 transmits the test end command 98 specifying the address 1, and the analog fire detector 42- 1 ends the test 99. Subsequently, the test end command 100 designating the address 2 is transmitted, and the analog fire detector 42-2 similarly ends the test 101. For the test end commands 98 and 100, an interrupt prohibition release command is simultaneously transmitted to restore the interrupt signal transmission function, but this is omitted.

  When the parallel test operations of the two analog fire detectors 42-1 and 42-2 at address 1 and address 2 are completed in this way, the test command designating address 3 at the timing following the next sampling command 80. 102 and the test command 104 designating the address 4 are transmitted, the test starts 103 and 105 are performed for the two analog fire detectors 42-3 and 42-4, and the parallel test operation is performed in the same manner. Become.

FIG. 18 is a flowchart showing the processing operation of the receiver 40 shown in FIG. In FIG. 18, when the power of the receiver 40 is turned on, initialization is performed in step S1. Subsequently, in step S2, the terminal address n is set to the first n = 1. In step S3, it is checked whether the operation test is performed. In this embodiment, the operation test of the terminal is (1) at power-on start,
(2) Regular tests at regular intervals, for example, once a day,
(3) Operation test by specifying the terminal address during maintenance inspection,
One of them is done.

  Usually, since it is not an operation test, the process proceeds to step S4, and polling is performed by transmitting a polling command designating an address n = 1. Subsequently, in step S5, a response signal from the terminal is received, and the presence or absence of a state change is checked from the response signal data in step S6. If there is a state change, the process proceeds to step S7, where it is checked whether or not the test is in progress, and then in step S8, a corresponding process is performed according to the contents of the state change.

  This response processing includes various response processing such as fire processing and failure processing. Subsequently, in step S9, for example, it is checked whether or not the sampling timing has been reached every second. If the sampling timing has been reached, a sampling command is issued in step S10, and terminal information by AD conversion is simultaneously transmitted to all terminals. Command the collection process.

  Subsequently, in step S11, it is checked whether or not it is the final terminal address. If it is not the final terminal address, the terminal address is incremented by 1 in step S23, and the same processing is repeated. If it is the last terminal address in step S11, the process returns to step S2, and polling from the first terminal address is repeated.

  Next, when the test is determined in step S3, the process proceeds to step S12, in which addresses of two analog fire detectors are designated and an interrupt prohibition command is issued. If an interrupt prohibition command is received on the analog fire detector side, a response signal is returned. In step S13, response reception is confirmed, and in step S14, a response confirmation command (ACK command) is transmitted. . Thereby, the transmission process of the interrupt prohibition command is completed.

  In step S15, the addresses of the two analog fire detectors are sequentially designated and a test command is transmitted. Also for the test command, the confirmation command is issued in step S17 based on the reception confirmation of the terminal response in step S16.

  Collection of test data after transmitting a test command is performed through normal polling processing. That is, after transmitting the test command, the process proceeds to step S4 to perform normal polling. If it is determined in step S6 that the state has changed since reception of the response signal in step S5, it is checked in step S7 whether the test is in progress.

  If the test is in progress, it is determined in step S19 whether or not the test has been normally performed. If a test report is received and a normal test operation is being performed, a test end command is transmitted in step S21, and then step S22. Send an interrupt disable release command. As for the transmission of the test end command and the interrupt prohibition release command, a confirmation command for the reception of a response from the terminal is issued as in the case of the interrupt prohibition command and the test command, but this is omitted in the flowchart.

  In step S19, if the test report is not received and the test operation is not normally performed, the process proceeds to step S20, and the failure occurrence is displayed by the terminal failure process. Note that analog fire detectors that are determined to be faulty may be excluded from polling targets until repair and replacement are completed.

  FIG. 19 is a flowchart showing the processing operation on the analog fire detector side. In FIG. 19, when the power is turned on, initialization is performed in step S1, and the presence or absence of signal reception is monitored in step S2. When the signal is received, it is checked in step S3 whether or not it is a sampling command, and if it is not a sampling command, address match is checked in step S4.

  If an address match is obtained, it is checked in step S5 whether it is a polling command. If it is a polling command at the time of normal calling, data held by sampling is transmitted to the memory in step S6. If the command is an interrupt disable command in step S7, the process proceeds to step S8, the interrupt disable flag FL is set to FL = 1, and the interrupt transmission function is disabled.

  If an interrupt prohibition release command is determined in step S9, the interrupt prohibition flag is reset to FL = 0 in step S10. When a test command is determined in step S11, an analog fire detector operation test is performed in step S12. Furthermore, if it is a test end command in step S13, the test operation is ended in step S14.

  On the other hand, if the sampling command is determined in step S3, the process proceeds to step S15, and the detection signal is sampled by AD conversion and held in the memory. Subsequently, in step S16, it is determined whether or not a fire is detected from the sampling data. If a fire is detected, the interrupt prohibition flag FL is checked in step S17. If the interrupt prohibition flag is in a reset state with FL = 0, the process proceeds to step S18. Proceed and send interrupt signal.

  At this time, if the fire is detected by the operation test, the interrupt prohibition flag is set to FL = 1 by the interrupt prohibition command prior to the test command, so the interrupt signal is not transmitted in step S16.

  As for the interrupt signal from the analog fire detector in the above-mentioned R-type fire alarm system, a break signal that destroys normal terminal transmission data is transmitted. However, the interrupt signal is not limited to the break signal, and an appropriate interrupt code is used. A signal may be used. In the above embodiment, interrupt confirmation is called after the interrupt signal and the detailed interrupt information is returned. However, if detailed information is included in the first interrupt code signal, the interrupt confirmation call is unnecessary. It is.

  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.

  In FIG. 1, the sensor line 2 for sending fire signals and the test line 4 for sending test signals are configured as separate lines. However, the present invention is not limited to this. May be sent out. For example, the receiving circuit unit 6 and the fire detector of the receiver of FIG. 1 have the functions of the transmission unit 50 and the call response unit 44 of the analog fire sensor 42 and the test control unit 46 of FIG. 8, respectively. No. 3 sends out a fire signal by substantially short-circuiting the sensor line, and at the time of testing, the fire detector receives a test start signal specific to the terminal via the sensor line and performs a test operation. The result may be returned to the receiver using a sensor line.

  In the R-type system of FIG. 8, only the analog fire detector 42 is connected to the transmission line 41 drawn from the receiver. However, the present invention is not limited to this. It may be a detector repeater to which an on / off type fire detector that transmits a signal is connected.

  The detector repeater is internally provided with the same test instruction unit 14, reception circuit unit 6 and test control unit 7 of the receiver of FIG. 1, and an on / off type fire is caused by drawing a sensor line from the reception circuit unit. A sensor is connected. When a test signal is sent from the receiver 40 to the repeater, the repeater performs a test process and sends a test response to the receiver.

  The repeater test process may be configured so that the test state is set in the repeater and a test response is made to the receiver regardless of the state of the fire detector. However, the fire detector has a test function as shown in FIG. In the case of a fire detector, the repeater sends a test signal to a specific fire detector or all the fire detectors in order to perform the test operation in the same way as the operation of the receiver in FIG. The repeater may return the result to the receiver.

In this case, if a plurality of sensor lines are pulled out from the repeater, the test can be performed by repeating the test for the plurality of sensor lines as in the operation of FIG. Time can be shortened.

Block diagram of a P-type fire alarm system to which the present invention is applied FIG. 1 is a circuit block diagram showing an embodiment of a fire detector with an automatic test function of FIG. FIG. 1 is a time chart of an embodiment of an automatic test operation of a fire detector according to the test instruction unit of FIG. FIG. 1 is a time chart of another embodiment of the automatic test operation of the fire detector by the test instruction unit of FIG. Time chart of the test operation by the inspection circuit provided in the fire detector of FIG. Flowchart of receiver processing of FIG. Flowchart of test control processing in the receiver of FIG. Block diagram of an R-type fire alarm system to which the present invention is applied FIG. 8 is a circuit block diagram showing an embodiment of the fire detector with automatic test function of FIG. FIG. 8 is a time chart of an embodiment of an automatic test operation of the analog fire detector according to the test command section of FIG. FIG. 8 is a time chart of another embodiment of the automatic test operation of the analog fire detector according to the test command section of FIG. FIG. 8 is a time chart of another embodiment of the automatic test operation of the analog fire detector according to the test command section of FIG. Time chart showing normal monitoring process in receiver and analog fire detector in FIG. Time chart showing processing in the event of a fire in the receiver and analog fire detector of FIG. 8 is a time chart of an embodiment in which a test operation is performed in parallel with two fire detectors. Time chart showing test process in receiver and analog fire detector of FIG. Time chart showing test processing following FIG. Flowchart of receiver processing in FIG. Flowchart of sensor process of FIG. Explanatory drawing which showed the outline of the conventional fire alarm system Conventional automatic test operation time chart

Explanation of symbols

1, 40: Receivers 2-1 to 2-3: Sensor line 3, 3-1 to 3-4: Fire sensor 4: Test line 5, 48: MPU
6-1 to 6-3: receiving circuit units 7-1 to 7-3: test control unit 8, 51: operation unit 9, 52: alarm display unit 10, 53: district display unit 11, 54: transfer output unit 12, 55: Memory 13: Reception control unit 14, 58: Test command unit 15: Rectifier circuit / Noise absorption circuit 16: Switching circuit 17: Constant voltage / current limiting circuit 18: Control circuit unit 19: Oscillation circuits 20, 69: Light emitting elements 21, 70: Light receiving elements 22, 71: Amplifier circuit 23: Comparison circuit 24: Operation indicator lamp 25: Test switch unit 26, 72: Test light emitting element 27: Inspection circuit 28, 29: Switch circuit 30: Alarm Detection circuit 31: Forced recovery circuit 41-1 to 41-3: Transmission line 42-1 to 42-4: Analog fire detector 44: Call response unit 45: Interrupt control unit 46: Test control unit 56: Call control unit 57: Interrupt processing unit 60: Alarm indicator lamp Road 61: rectifier circuit 62: the noise absorbing circuit 63: the transmission signal detection circuit 64: the response signal output circuit 65: constant voltage circuit 66: transmission control circuit 67: address type setting circuit 68: light emission drive circuit

Claims (6)

Connected to the signal line drawn from the receiver or repeater is a fire detector equipped with an automatic test unit that executes a test operation in response to an instruction from the test command unit of the receiver or repeater and responds to the test result. In the fire alarm system,
The test instruction unit of the receiver or repeater instructs a fire start to another fire detector before instructing the start of the test after instructing a fire detector to start the test. .
In the fire alarm system according to claim 1,
The receiver or repeater is connected to the fire detector having an automatic test function on a signal line drawn separately for each system,
The test command unit instructs the start of a test to another fire sensor connected to the signal line of the same system before instructing the start of the test to a certain fire detector and before the end of the test. Fire alarm system.
In the fire alarm system according to claim 1,
The receiver or repeater is connected to the fire detector having an automatic test function on a signal line drawn separately for each system,
The test command unit instructs a fire detector connected to a signal line of another system to start a test before instructing a fire detector to start the test and before the test is finished. Fire alarm system.
In the fire alarm system according to claim 1,
The receiver or repeater is connected to the fire detector having an automatic test function on a signal line drawn separately for each system,
The test command unit instructs the start of a test to another fire sensor connected to the signal line of the same system before instructing the start of the test to a certain fire detector and before the end of the test. A fire alarm system instructing another fire detector connected to a signal line of a system to start a test.
In the fire alarm system according to claim 1,
The fire detector is an on-off type fire detector that switches between signal lines drawn from a receiver or a repeater when a fire is detected to flow an alarm current,
The receiver or repeater is a receiver that detects a fired current of a signal line by a fire detector and warns the occurrence of a fire on a signal line basis,
The test command unit of the receiver or repeater outputs a test voltage signal to the fire detector connected to the test line drawn from the receiver or repeater to sequentially perform a test operation, and reports by the test. When receiving current, it is determined as a normal sensor, and when it does not receive a test alert current, it is determined as a fault sensor and a forced recovery voltage signal is output to the signal line,
The automatic test unit of the fire detector receives a test voltage signal from the test command unit, performs a test operation, and outputs a test voltage signal to the next fire detector when a test is issued. A fire alarm system characterized by receiving a forced recovery voltage signal from the test command unit to recover the test operation and outputting the test voltage signal to the next fire detector when the alarm is not issued.
In the fire alarm system according to claim 1,
The fire detector is a fire detector having a data transmission function for sampling and responding to detection data based on a command from a receiver,
The receiver sends sample commands to all fire detectors at regular intervals to sample the detection data, and then sends a polling command that sequentially specifies the sensor addresses to respond to the sampled detection data. Let the receiver judge the fire,
The test command unit of the receiver transmits a test command specifying an address to the fire detector to perform a test operation, subsequently transmits a sampling command to sample the test detection data obtained by the test operation, Next, after sending a polling command specifying the address and sending a fire judgment response with test detection data and test operation, send a test end command,
The automatic test unit of the fire detector receives a test command designating a self-address from the test command unit to perform a test operation, and subsequently receives a sampling command to obtain test detection data obtained by the test operation. Sampling and holding, then receiving a polling command specifying its own address and responding with test detection data, and further receiving a polling command specifying its own address and judging the fire from the test detection data and issuing a test A fire alarm system characterized by responding to a report.

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