JP3267885B2 - Fire alarm and fire detector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire alarm system comprising a detector for detecting a fire and a receiver for notifying a fire or the like based on a signal output from the detector, and the fire alarm system. The present invention relates to a fire detector, and more particularly to a fire alarm system and a fire detector capable of easily performing an operation test of the detector with a simple configuration.

[0002]

2. Description of the Related Art Generally, a fire alarm system determines a fire based on a detector for detecting a fire and a signal output from the detector, and activates various alarm devices and disaster prevention equipment when a fire occurs. And a receiver. In addition, since the above fire alarm system is required to operate normally at all times, operation tests are performed relatively frequently.

In the above-mentioned operation test, generally, a worker enters a place where a detector of a fire alarm system is installed, and irradiates heat or light to the detector in accordance with the type of the detector, thereby simulating the detector. In this state, a fire has occurred, and in this state, the sensor detects the fire and outputs a signal, and whether or not the receiver receives this signal and operates, that is, the sensor or the receiver operates normally It is determined whether or not to operate.

[0004] However, the work of irradiating each sensor with heat or light is complicated and requires a long operation test, and it is difficult to enter each dwelling unit in an apartment house such as an apartment. Therefore, a method has been developed in which an operation test is performed by operating each sensor in the same manner as when a fire occurs, for example, by operating the receiver side without applying heat or light to each sensor. I have.

[0005] That is, in the above method, the sensor is configured to be able to simulate a state at the time of fire occurrence based on an external signal, and when an operation test is performed for each sensor, The above signal is output to each sensor from the receiver side, and each sensor is set to the state at the time of fire occurrence, and the pseudo-state at the time of the fire occurrence operates normally and responds to the occurrence of fire It is determined whether or not to output the output signal.

By using such a test method, it is not necessary to enter the installation location of each sensor and bring each sensor into a state at the time of a fire, so that the operation test can be labor-saving and can be performed in an apartment house. The operation test can be performed without entering the dwelling unit where each sensor is installed.

[0007]

By the way, as described above, each detector is operated from the receiver side so as to be in a state at the time of a fire, so that each of the sensors outputs a signal at the time of a fire. In such a case, if a signal at the time of a fire is output from a plurality of sensors at the same time, the signal will be confused and it will be impossible to know which sensor output the signal.

Therefore, when an operation test is performed by operating each sensor by an operation from the receiver side, since a plurality of sensors are connected to the receiver, the master unit and the plurality of slave units are connected. It is necessary to perform the same processing as transmitting and receiving signals between them. That is, an address is given to each sensor, and when the receiver outputs an address and a signal (data),
Only the sensor corresponding to the output address needs to respond to the signal output from the receiver.

Therefore, it is necessary to provide each sensor with a transmission IC for recognizing an address and transmitting a signal. Usually, however, one fire alarm system has a large number of sensors. Therefore, if a transmission IC is provided for each sensor, the cost of the fire alarm facility increases.

The present invention has been made in view of the above circumstances, has a relatively simple configuration, and does not assign an address to each sensor. It is an object of the present invention to provide a fire alarm system and a fire alarm capable of performing an operation test by operating as follows.

[0011]

According to a first aspect of the present invention, there is provided a fire alarm system comprising a plurality of detectors connected in a row by a continuous line to a receiver, and the detector having the line. And a tester for performing an operation test of the sensor, wherein the tester includes:
A pulse output means for repeatedly outputting a test pulse to each sensor via the line, a receiving means for receiving a signal output from the sensor for which an operation test has been normally performed, and a signal received by the receiving means Counting means for counting the number of times the pulse has been output, wherein the sensor has a pulse detecting means for detecting a pulse output from the pulse output means of the tester, and the sensor has a pulse output means for the tester. When the pulse output from is input for the first time, the pulse is applied so that the pulse is not input to another sensor connected to the other side of the tester than the sensor to which the pulse is input on the line. Pulse canceling means for canceling, a test control means for causing the sensor to simulate a fire occurrence state when the pulse detecting means first detects a pulse, There pseudo becomes fire state, and, if the operation is successful, that a transmitting means for outputting a signal to the receiving means of the tester is provided with a means for solving the above-described problem.

According to the above configuration, when the test pulse is repeatedly output from the pulse output means of the tester, the pulse detection means of the sensor arranged closest to the tester on the line is used for the first pulse. Is detected. Also, when a pulse is first input to the sensor, the pulse canceling means causes the pulse to be prevented from being input to another sensor connected to the other side of the tester from the sensor. Counteract.

Therefore, the pulse detecting means of another sensor is
At this stage, no pulse is detected and only the sensor will respond to the test pulse. In the above-mentioned sensor, the test control means makes the sensor simulate a fire occurrence state, and when the sensor operates normally in this fire occurrence state, the transmitting means sends a signal to the receiving means of the tester. Will be output. That is, in the receiving means, after the first test pulse is output, a signal is received from one of the sensors connected to the tester side, so that the signal is not confused and the signal is transmitted. The output sensor can be specified.

Next, when the next test pulse is output, the second pulse is input to the sensor closest to the tester, and the pulse canceling means and the test control means do not operate. In this sensor, no pulse is canceled and no signal is output. Therefore, in this case, a pulse is input and detected by the pulse detecting means of the second sensor which is closest to the sensor closest to the tester. Then, in the second sensor, this becomes the input and detection of the first pulse, so that the pulse is canceled as described above, and a signal is output to the tester when the sensor operates normally.

When the test pulse is repeatedly output, the operation test of each sensor is sequentially performed for each test pulse in accordance with the arrangement order of the sensors on the line from the tester side. . Then, if the sensor operates normally, a signal is input from the transmitter of the sensor to the receiver of the receiver after outputting one test pulse, and if the sensor does not operate normally, Therefore, no signal is input to the receiving means within a predetermined time after outputting one test pulse. If it is possible to determine the order of the test pulse at that time, it is possible to recognize which sensor did not operate normally from the arrangement order of the sensors.

Further, the number of times the signal is received by the receiving means of the tester is counted by the counting means. That is, the number of normally operated sensors when the operation test of each sensor is sequentially performed as described above is counted by the counting means. Therefore,
At the stage when the operation tests of all the sensors have been completed, if the count value of the counting means matches the number of sensors connected to the testing device, it means that all the sensors have normally operated, and the counting means If the count value is less than the number of sensors connected to the tester, there will be malfunctioning sensors.

As described above, according to the fire alarm means, it is possible to test the operation of each of the sensors one by one in accordance with the arrangement order of the sensors on the line for each test pulse output from the tester. Even if an address is not assigned to each sensor or a transmission IC is not provided, the operation of each sensor can be easily tested at low cost without confusion of signals.

[0018] The fire alarm system according to claim 2 of the present invention comprises:
The pulse output means of the tester shall decrease the voltage applied to the sensor as the pulse via the line, and the pulse canceling means may reduce the voltage applied to the sensor first. In this case, the solution to the above problem is to have a capacitor that discharges electric charge so as to cancel the voltage drop. According to the above configuration, the function of the pulse canceling means can be realized by a simple method of discharging the electric charge stored in the capacitor.

The fire alarm system according to claim 3 of the present invention comprises:
Display means for displaying the count value counted by the counting means; and a signal to the display means when no signal is received by the receiving means within a preset time after a pulse is output from the pulse output means. And a display control unit that outputs a numerical value. When the display unit receives a signal from the display control unit, the display unit changes the display state of the displayed numerical value.

According to the above arrangement, the count value counted by the counting means is displayed on the display means. Further, the display control means outputs a signal to the display means when the signal is not received by the reception means within a preset time after the test pulse is output from the pulse output means, and the display control means The display status of numerical values is changed. Therefore, when there is a sensor that does not operate normally, the display state of the numerical value by the display means is changed, and it is possible to visually recognize that there is a sensor that does not operate normally.

In addition, since the display means displays a numerical value indicating the order of the sensor in front of the sensor which does not operate normally at this stage, the sensor which does not operate normally indicates the next to the displayed numerical value. It becomes a sensor in order, and it is possible to specify a sensor that does not operate normally. In addition, when all the sensors operate normally, when the operation test of all the sensors is completed, no signal is received by the receiving means, and again, the display state of the numerical value displayed on the display means is displayed. Will change, but the numerical value whose display state has changed at this time matches the number of sensors connected to the tester, so it is necessary to recognize that all sensors have operated normally. Can be. If the signal is not received by the receiving means within a preset time after the test pulse is output from the pulse output means, the operation test is terminated. The display state changes, and the end of the operation test can be visually judged. In addition, whether or not the display state changes corresponds to the number of sensors connected to the tester, the sensor does not operate normally. It can recognize whether there is a vessel.

The change of the display state is, for example, as follows.
This indicates that the blinking display and the continuous lighting display are to be changed.In addition, it also includes a change in display color, a change in display brightness, a change in display position, and the like. , A dark display to a bright display, or a lower display position.

[0023] The fire alarm system according to claim 4 of the present invention comprises:
The number of sensors connected to the tester is displayed at a position near the display means as the means for solving the above problem.

According to the above configuration, the number of sensors connected to the tester displayed near the display means can be easily compared with the number displayed on the display means. That is, it is possible to easily and surely check whether or not the numerical value displayed on the display means and the display state of which has been changed as described above matches the number of sensors connected to the test. It is possible to easily and reliably check whether there is a sensor that does not operate normally.

[0025] The fire alarm system according to claim 5 of the present invention comprises:
For each dwelling unit of the apartment house, the receiver and a sensor connected to the receiver are arranged in the dwelling unit, and a dwelling unit receiver connected to each of the receivers arranged for the dwelling unit, Each of the dwelling units is provided outside the dwelling unit and a repeater for connecting the receiver and the dwelling receiver is provided.The tester is detachably connectable to the repeater, In the above-mentioned repeater, a means for solving the above-mentioned problem is to connect a tester and a sensor connected to the repeater.

According to the above configuration, in the apartment house, when performing the operation test, the tester is connected to the repeater disposed outside the dwelling unit, so that the sensor in the dwelling unit and the tester are connected. Therefore, even if the receiver in the dwelling unit is arranged, the operation test can be performed from outside the dwelling unit as described above. In addition, when performing an operation test of each sensor from outside the dwelling unit, a test device is provided in the living room receiver without a configuration in which the test device is connected to the repeater. May be operated together with each sensor from each receiver. However, in this case, transmission and reception of signals become complicated, and equipment cost may increase.

On the other hand, if the configuration is such that the tester is connected to the repeater, the operation of the sensor can be tested only by transmitting and receiving signals between the tester and the sensor via the repeater. As described above, the operation test of the sensor can be easily performed at low cost. In addition, the said house ridge receiver alert | reports a fire to the management person in charge of an apartment house, or a person in charge of security, for example. Further, the living room receiver may control each receiver, for example, if a fire occurs in one dwelling unit, the living room receiver receives a signal from the receiver of the fired dwelling unit, Output signals to receivers of other dwelling units,
A receiver in another dwelling unit may notify that a fire has occurred in the apartment house.

[0028] The fire alarm system according to claim 6 of the present invention comprises:
A solution to the above problem is that the tester includes a sound output unit that outputs a sound that can identify that the operation test of the sensor is being performed.

Without this configuration, the tester cannot confirm that the operation test of the sensor is being performed from the start of the test, for example, by operating a test switch, to the end of the test. By adding the configuration of the output means, the tester can perform the test while confirming from the sound output that the state of the tester is performing the operation test of the sensor.

The fire alarm system according to claim 7 of the present invention comprises:
A first detection unit configured to detect that a test result of one sensor is normal based on the reception of the signal by the reception unit; and the test unit within a predetermined time from the output of the test pulse. Second detection means for detecting that the test result of one sensor is abnormal based on the signal not being received by the reception means, or that the test of all connected sensors has been completed; A sound output that outputs a first sound output signal to the sound output means based on the detection of the first detection means, and outputs a second sound output signal to the sound output means based on the detection of the second detection means; Control means, and the sound output means includes sound output means for outputting a sound corresponding to the sound output signal output from the sound output control means.

According to the above configuration, the tester can confirm that the state of the tester is during the operation test of each sensor, that the test result of each sensor is normal, and that the test result is normal. If something was abnormal or the operation test was completed,
The test can be performed while each state during the operation test is confirmed by hearing.

[0032] The fire alarm system according to claim 8 of the present invention comprises:
The tester is provided with a test start switch for starting a sensor test and causing a pulse output unit to start pulse output, and the sound output control unit controls the sound output unit based on an ON signal of the test start switch. Outputting the third sound output signal is a means for solving the above problem.

With the addition of the above-described configuration, the tester can perform a test from the start to the end of the operation test of the sensor while checking each state of the operation test at that time. That is, in addition to the above-described confirmation of each state of the operation test, the start of the operation test can also be confirmed by hearing.

A fire sensor according to a ninth aspect of the present invention is a thermal sensor having a heat-sensitive element whose resistance value changes according to the ambient temperature, and generating a pseudo fire detection state by inputting a test pulse. A heat-sensitive section in which the heat-sensitive element and the first resistor are connected in series; voltage applying means for applying a predetermined voltage to the heat-sensitive section; and a potential at a connection point between the heat-sensitive element and the first resistor. Fire detection means for detecting a fire based on the first resistance, a second resistance connected in parallel with the first resistance,
By turning off, the connection between the first resistor and the second resistor is closed /
Means for solving the above problem include a switch means for opening and a test control means for turning off the switch means based on the input of the test pulse while turning on the switch means at the time of fire monitoring.

According to the above configuration, when monitoring a fire, the switch is turned on to connect the first resistor and the second resistor in parallel, but a test pulse is input during a test. Then, the switch means is turned off under the control of the test control means, and the parallel connection of the second resistor is disconnected. As a result of this disconnection, even if the thermal element has a resistance value at a normal temperature, the potential value at the connection point between the thermal element and the first resistor changes, and a state similar to that in which the thermal element changes resistance by heat is obtained. (Pseudo fire detection state) can be generated. According to this pseudo fire detection state, if the fire detection means is normal, the fire detection means detects a fire. That is, by inputting a test pulse to the fire detector, it is possible to test whether the fire detection means is normal. Therefore,
By connecting an electric wire (for example, a continuous line to a receiver) to which a test pulse of the fire detector can be input, the fire detector (especially fire detection means) can be tested by remote control.

[0036] The fire detector according to claim 10 of the present invention comprises:
A fire detector for inputting a test pulse to generate a simulated fire detection state, wherein a fire detector for detecting a fire;
A simulated fire signal output unit that outputs a simulated fire signal for causing the fire detection unit to detect a simulated fire; a test control unit that outputs the simulated fire signal based on the input of the test pulse; A delay means for delaying the timing from the input to the output of the pseudo fire signal is provided as a means for solving the above problem.

According to the above configuration, a pseudo fire signal is output based on the input of the test pulse, and a pseudo fire detection state is generated in the fire detection unit. It is possible to delay the timing until the occurrence of a typical fire detection state. Thus, the test side of the sensor can shift the timing of the processing for outputting the test pulse and the timing of the test processing for determining whether the sensor has normally operated or not. In other words, the two processes are performed not at the same time but at different timings, so that the process for testing the sensor can be simplified. For example, if the line for inputting the test pulse is the same as the line to which the fire signal is sent from the detector, the transmission timing of the test pulse and the fire signal will not be shifted and overlapped, which is particularly effective. It is a target.

[0038] The fire detector according to claim 11 of the present invention comprises:
A time limiter for setting the output of the simulated fire signal to an output for only a predetermined time is provided, and the fire detector detects a simulated fire while the simulated fire signal is being input, and outputs the simulated fire signal. Terminating the detection of a simulated fire when the input is interrupted is a means for solving the above problem.

According to the above configuration, the output of the pseudo fire signal based on the input of the test pulse is output for a predetermined time.
It is possible to reliably generate the pseudo fire detection state, and to prevent the pseudo fire detection state from continuing more than necessary. Therefore, whether or not a fire is detected during a predetermined time during which the pseudo fire signal is output can be used as a criterion for determining whether or not the fire detector is normal.
That is, a time reference can be set for the test of the fire detector. In addition, when a false fire detection state ends in a predetermined time, for example, when testing a large number of sensors,
Since the occurrence and termination of the simulated fire detection state can be performed alternately one by one, the processing on the side testing the detector can be simplified. For example, when a plurality of sensors are connected to the same line, it is possible to avoid a situation where fire signals due to pseudo fire detection are simultaneously output from the plurality of sensors and overlap each other, which is particularly effective.

[0040]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A fire alarm system according to an embodiment of the present invention will be described below with reference to the drawings. Although the fire alarm system of this example has been developed so as to be suitable for use in an apartment house, the present invention is not limited to the fire alarm system for an apartment house. [First Embodiment] FIG. 1 is a block diagram showing an overall schematic configuration of a fire alarm system according to a first embodiment of the present invention.

As shown in FIG. 1, the fire alarm system according to the first embodiment is for an apartment house,
2 are provided with a plurality of sensors 4... And receivers 5 and 5 that operate based on signals from the sensors 4. Machine 5,5
And the receivers 5 and 5, which are provided for each of the dwelling units 1 and 2 and which are provided for each of the dwelling units 1 and 2 and which are provided in the dwelling units 1 and 2, are connected to each other. There are provided repeaters 7, 7 for connecting the receivers 5, 5 for each of the dwelling units 1, 2 and the receiver 6 for dwelling.

Further, the fire alarm equipment is provided with a tester 8 used for performing an operation test, and the tester 8 can be detachably connected to the repeaters 7, 7. The detectors 4 are, for example, smoke detectors that detect the occurrence of a fire by detecting smoke density, and heat detectors that detect the occurrence of a fire by detecting an increase in temperature due to a fire. 1,2
In the example,
The sensors in the dwelling units 1 and 2 are joined in a chain by a pair of lines 4a and 4a, and connected to the repeater 7 via connection terminals P1t and P2t. Also, the last detector 4
After that, termination devices 9 and 9 having termination resistors (not shown) are arranged.

In FIG. 1, one dwelling unit 1, 2
Are provided with three sensors 4..., And these three sensors 4.
Are connected in a line by the tracks 4a, 4a, but the number of detectors 4 for each dwelling unit 1, 2 is not limited to this. Further, the sensors 4 have a well-known function of performing a pseudo operation when a test pulse, which will be described later, is input from the test device 8 in the same manner as when a fire occurs.

The receivers 5 and 5 have a connection terminal P3
z, P4z are connected to connection terminals P3t, P4t of the repeaters 7, 7, and are connected to the sensors 4,... disposed in the same dwelling units 1, 2, via the repeaters 7, 7, respectively. The receivers 5 and 5 have sound devices such as a buzzer and an alarm device (not shown) including a warning light and various lamps, and generate a fire based on a signal output from the sensor 4. Is determined, and the alarm device is activated. The receivers 5 and 5 are connected to a connection terminal P5.
z, P6z are connection terminals P5t, P6t of the repeaters 7, 7
, And connected via the repeaters 7, 7 to the living room receiver 6 connected to the connection terminals P7t, P8t of the repeaters 7, 7. When a fire is determined as described above, a signal indicating the occurrence of a fire is output to the living building receiver 6.

The living building receiver 6 is disposed, for example, in a control room of a condominium, and connected to the receivers 5, 5 of the dwelling units 1, 2 via the repeaters 7, 7 as described above. When a signal indicating the occurrence of a fire is output from the receivers 5 and 5 of the dwelling units 1 and 2, the signal is received. The living building receiver 6 has an alarm device (not shown) substantially similar to the alarm device of the receivers 5 and 5, and a display device (not shown) that displays the dwelling units 1 and 2 where a fire has occurred. ), When a signal indicating the occurrence of a fire is input from the receivers 5 and 5, the alarm device is activated to notify the user of the signal and to indicate the dwelling units 1 and 2 where the fire has occurred.

When a signal indicating the occurrence of a fire is input from the receivers 5 and 5 of the dwelling units 1 and 2 in which a fire has occurred, the receivers 6 and 5 of the other dwelling units 1 and 2 are connected to the receivers 5 and 5 of the other dwelling units. And a signal indicating that a fire has occurred in the apartment house. In addition, in the receivers 5 and 5 of each dwelling unit to which the signal indicating that a fire has occurred in the apartment building from the housing building receiver 6 is activated, the alarm device is activated to notify that the fire has occurred in the apartment building. To inform.

The repeaters 7, 7 are provided for each dwelling unit 1, 2,
The sensors 4 are provided outside the dwelling units 1 and 2 and connected to the connection terminals P1t and P2t as described above, and the receivers are connected to the connection terminals P3t, P4t, P5t and P6t. 5 and 5 are connected, and the ward receiver 6 is connected to the connection terminals P7t and P8t. In addition, the repeaters 7, 7 have connection terminals P9t, P10t, P11t, P12
t, connection terminals P9s, P10s, P11 of the tester 8
s and P12s are easily and detachably connected.

Normally, the repeaters 7, 7 connect the sensors 4,... In the dwelling units 1, 2 to the receivers 5, 5 as described above, and , 5 and the ward receiver 6 are connected. In addition, repeater 7,
When the tester 8 is connected and a test switch 8e described later in the tester 8 is operated, the detectors 4 and the receivers 5
5 is disconnected, the tester 8 is connected to the sensors 4..., And the tester 8 is connected to the receivers 5, 5. The operation test of the machines 5 and 5 is enabled.

The tester 8 outputs a test pulse described later to each of the sensors 4. The tester 8 detects whether or not the operation at the time of the occurrence of a fire has been performed normally when each of the sensors 4. It can be checked whether or not it operates normally. The tester 8 transmits a signal to the receivers 5 and 5 instead of the detectors 4... 5 can be confirmed as to whether it has operated normally.

Here, a detailed description will be given of a configuration for confirming whether or not each of the detectors 4 has normally operated during an operation test of the fire alarm equipment. FIG. 2 mainly shows a portion that operates during an operation test of the sensor 4. As shown in FIG. 2, the sensor 4 includes a test pulse detection circuit 4b for detecting a test pulse output from the tester 8 as described later, and a fire for detecting a fire based on smoke density or temperature when a fire occurs. The detection circuit 4c and the fire detection circuit 4 during the operation test
a display circuit 4d for outputting a signal for activating a later-described number indicator 8a of the tester 8 when c operates normally.
And a pulse canceling circuit 4e for performing discharge so as to cancel the test pulse when the test pulse whose voltage changes from high to low is input to the sensor 4, and a current output from the pulse canceling circuit 4e. And a diode D1 for preventing the backflow.

The sensor 4 is connected to the connection terminals P1t and P2t of the repeaters 7 and 7 or the sensors 4 arranged on the lines 4a and 4a and closer to the repeaters 7 and 7 than the sensor 4 described later. Connecting terminals P1k, P2k connected to the connecting terminals P1k ', P2k'
On 4a, there are connection terminals P1k 'and P2k' connected to connection terminals P1k and P2k of the sensor 4 arranged on the opposite side of the repeaters 7 and 7 from the sensor 4.

The test pulse detection circuit 4b detects a pulse by a known method. The test pulse detection circuit 4b outputs a signal to the fire detection circuit 4c when a test pulse is first detected, and continuously outputs the signal to the pulse cancellation circuit 4e at a shifted timing as described later. (A current is supplied). The fire detection circuit 4c
Are well-known, for example, detecting smoke density and temperature and outputting a signal of a level corresponding to the smoke density and temperature, or a fire when the smoke density and temperature become higher than preset values. Is output.

As is well known, the fire detection circuit 4c has a function of simulating a fire occurrence state during an operation test.
When a signal is input from b, an operation at the time of a fire occurrence is temporarily performed. Further, a fire occurrence detection circuit 4c
Is, if the operation in the event of a fire has been performed normally temporarily,
A signal is output to the display circuit 4d only for a moment (as will be described later, shorter than the interval between test pulses) (current is supplied).
It has become.

The display circuit 4d includes a Zener diode ZD and a light emitting diode LED1 arranged in parallel with each other.
And a switching transistor TR1 arranged in series with the zener diode ZD and the light emitting diode LED1. Then, the base of the transistor TR1 is connected to the fire detection circuit 4c. When the fire detection circuit 4c operates normally in the simulated fire occurrence state, a current flows through the base for a moment as described above. It has become. At this time, the emitter and the collector of the transistor TR1 are conducted, a current flows through the light emitting diode LED1, and the light emitting diode LED1 emits light.
The voltage between a and 4a drops to the voltage set by the Zener diode ZD.

The pulse canceling circuit 4e has a switching transistor TR2 and a capacitor C1 arranged in parallel. The transistor TR
2 is connected to the test pulse detection circuit 4b, and before the pulse is first detected in the test pulse detection circuit 4b, no current flows through the base of the transistor TR2. The transistor TR2 is off.

At this time, when a voltage is applied between the lines 4a, 4a, a voltage is applied to the capacitor C1 and electric charge is stored in the capacitor C1. Then, when the voltage between the lines 4a, 4a changes from high to low due to the first test pulse, the voltage applied to the capacitor C1 drops, so that the charge stored in the capacitor C1 is discharged. . Then, by discharging the electric charge to the capacitor C1, the lines 4a, 4a
The test pulse that changes from high to low is canceled by increasing the voltage between them.

Therefore, when another sensor 4 is connected to the rear side of the lines 4a, 4a, the first test pulse is canceled by the discharge of the capacitor C1 in the other sensors 4. , So that the test pulse cannot be detected in the test pulse detection circuit 4b of the other sensor 4. Note that a diode D1 is arranged on the line 4a so that a current due to the discharge of the capacitor C1 does not flow backward to the repeaters 7,7.

In the test pulse detection circuit 4b, the capacitor C1 is discharged, and then the voltage of the line 4a, which has dropped due to the pulse, rises, and again the capacitor C1 is discharged.
1 is charged with electric charge, the transistor T
A current is continuously passed through the base of R2.
As a result, the transistor TR2 is turned on and the transistor TR2 is turned on.
1 is in a state where no voltage is applied. Therefore, while the transistor TR2 is in the conductive state, no charge is stored in the capacitor C1, and thereafter, the transistor TR2
Even if a pulse is input to the sensor in the state where is turned on, the capacitor C1 does not discharge, and the pulse canceling circuit 4e that once canceled the pulse does not cancel the pulse again.

FIG. 3 shows the test pulse detection circuit 4b of FIG.
The circuit block diagram of FIG. The test pulse detection circuit 4b
The test control means comprises an input signal forming circuit IN, a logic circuit LG, and the like, detects a test pulse sent from the tester 8 and outputs a control signal to the fire detection circuit 4c and the pulse canceling circuit 4e. ing.

The input signal forming circuit IN receives a test pulse (Low pulse having a predetermined width) on the line 4a and forms an input signal to be input to the logic circuit LG from the test pulse. , A integrating circuit composed of a resistor R2 and a capacitor C2. When a test pulse is input to the input signal forming circuit IN, a LOW signal having a width longer than the test pulse is formed at the connection point U1, and this signal is input to the logic circuit LG as an input signal. The input signal forming circuit IN constitutes a part of the delay means, and also has a function of delaying the timing from the input of the test pulse to the output of the input signal.

The logic circuit LG is connected to the terminal M1 or the terminal M2 based on the signal input from the connection point U1.
h / Low signal is output. Then, control is performed such that the transistor TR2 of the pulse canceling circuit 4e is turned on / off by the output signal of the terminal M1, and the fire detection circuit 4c performs pseudo fire detection by the output signal of the terminal M2.

At the start of the test (at the time of reset), the logic circuit LG outputs a low signal to the terminals M1 and M2 because the potential of the connection point U1 is High, but outputs a low signal to the connection point U1. When a signal is input, a High signal is output to the terminals M1 and M2. Then, once a High signal is output to the terminal M1, the High signal is continuously output even if the voltage of the connection point U1 changes. However, when a detection signal indicating the detection of a fire is output from the fire detection circuit 4c, the potential of the terminal M2 may be returned to LOW. The state of the logic circuit LG can be reset by turning off the power supplied from the line 4a.

The logic circuit LG has a function as a delay means. The timing from when the LOW signal is input to the connection point U1 to when the High signal is output to the terminals M1 and M2 is predetermined. It is time delayed. The delay time of this timing is the same as the time when the terminal M
The time until a signal is output to the M1 and M2 sides is set to be longer than the interval between test pulses.

With the above-described configuration, when a test pulse is input to the test pulse detection circuit 4b, the timing is delayed by a function as delay means, and after the test pulse passes, the terminals M1 and M2 of the logic circuit LG are passed. High on the side
Is output. And that H
The transistor TR2 of the pulse canceling circuit 4e is turned on by the signal output of high, and the fire detecting circuit 4
A pseudo fire detection state is generated in c.

FIG. 4 is a circuit block diagram showing an example of the fire detection circuit 4c shown in FIG. The fire detection circuit 4c is a thermal fire detection circuit that detects heat by detecting heat.
Further, it has a function of generating a pseudo fire detection state by a control signal from the test pulse detection circuit 4b. The fire detection circuit 4c includes a detection unit SN as a fire detection unit and a heat sensing unit, a fire detection unit DT, a timed circuit TF,
3 as a voltage applying means for applying a constant voltage to the sensing unit SN
Terminal regulator RG and switch means for turning on / off the occurrence of a simulated fire detection state (portion consisting of transistor TR4, resistor R12, and diode D5)
And so on.

The sensing section SN includes a thermistor TH1 as a thermal element and resistors R8, R9 and R10.
The thermistor TH1, the resistor R9 and the first resistor R8 are connected in series, and the first resistor R8 and the second resistor R8 are connected in series.
10 are connected in parallel, and the parallel connection can be closed and opened by turning on / off the transistor TR4.
A constant voltage is applied to the sensing unit SN by a regulator RG, and the potential of the connection point U3 changes due to a change in the resistance value of the thermistor due to a temperature change. When the transistor TR4 is turned off, the potential at the connection point U3 changes in the same manner as when the temperature rises. That is, by turning on the transistor TR4, it is possible to change the state of the sensing unit SN to a state in which a fire is simulated (a simulated fire detection state).

The fire detection unit DT is connected to the connection point U of the sensing unit SN.
3 is monitored, and when a change in the potential exceeds a preset threshold value, a fire is generated, and a High signal is output to the N1 terminal side.
Is output.

The switch means is a portion comprising a transistor TR4, a resistor R12, and a diode D5. This switch means that the potential of the connection point U2 is Lo when monitoring a fire.
While the current is w, a current flows through the resistor R12 to generate a voltage between the base and the emitter of the transistor Tr4, and the transistor Tr4 is turned on. However, when the potential of the connection point U2 becomes High, the diode D5 is turned off. Since no current flows through the resistor R12, there is no potential difference between the base and the emitter of the transistor Tr4, and the transistor Tr4 is turned off.

That is, the connection point U2
Is a simulated fire signal that generates a simulated fire detection state, and a High signal is output to the connection point U2.
The test pulse detection circuit 4b that outputs the signal of h and the timed circuit TF constitute a pseudo fire signal output unit.

The time limit circuit TF includes a capacitor C4 and a resistor R
5, R6, and the terminal M2 of the test pulse detection circuit 4b.
A High signal output from the side is output to the connection point U2 for a predetermined time. For example, Hi is connected to the terminal M2.
gh, the potential of the connection point U2 becomes Hig.
It continuously drops from h to LOW. That is, the connection point U
The potential of No. 2 becomes High for a predetermined time and returns to LOW after the predetermined time has passed.

With the above configuration, a continuous High signal is output from the test pulse detection circuit 4b to the fire detection circuit 4b.
c, first, Hig via a timed circuit TF
The signal of h is output to the connection point U2 for a predetermined time, and accordingly, the transistor TR4 is turned off for a predetermined time.
When the transistor TR4 is turned off, a pseudo fire detection state occurs for a predetermined time in the detection unit SN, and if the fire detection unit DT is normal, the fire detection state is detected during the predetermined time and the terminal N1 is detected. Output a fire signal (High signal).

After the predetermined time has passed, the transistor TR4 is turned on again, and the simulated fire detection state ends. Thereby, for example, the output of the fire signal from the fire detection unit DT is also stopped.

FIG. 5 shows the basic configuration of the tester 8. The tester 8 connects the receivers 5 and 5 to the sensors 4 in the repeaters 7 and 7 to each other.
A test signal transmitting and receiving unit 8 for transmitting and receiving signals to and from the switching circuit 8b for switching to the connection with the sensor 4
c, the number indicator 8a for displaying the number of the sensors 4 that have been operated normally and operated normally, the control circuit 8d for controlling the test signal transmitting / receiving unit 8c and the number indicator 8a, A test switch (SW) 8e for instructing the control circuit 8d to start a test, a transmission circuit 8f for outputting a signal to the receivers 5 and 5 during an operation test of the receivers 5 and 5, and each circuit of the tester 8 And a power source 8g for supplying power to the sensors 4.

When the tester 8 is connected to the repeaters 7, 7 and the test SW 8e is operated, the switching circuit 8b tests the connection between the receivers 5, 5 of the repeaters 7, 7 and the sensors 4,. Table 8
A current is supplied to a relay RL1 which will be described later for switching to a connection between the sensor 4 and the sensor 4.
s and a connection terminal P9t of the repeaters 7, 7 connected to the connection terminal P9s, so that current can flow to the relay RL1. The test signal transmitting / receiving unit 8c transmits the power of the predetermined voltage to the connection terminal P11s of the tester 8 and the connection terminal P11t of the repeaters 7, 7 connected to the connection terminal P11s.
And P connected to the connection terminal P11t in the repeaters 7, 7
1t, and outputs a test pulse (voltage) that changes from high to low based on a signal from the control circuit 8d to the sensors 4.

The test signal transmitting / receiving section 8c detects a decrease in voltage by the display circuit 4d of the sensors 4. Then, the test signal transmitting / receiving section 8c
When a voltage drop is detected, a signal indicating that the voltage drop has been detected is output to the control circuit 8d. In addition, the test signal transmitting / receiving unit 8c outputs a test pulse when the display circuit 4d of the detectors 4 cannot detect a decrease in voltage within a predetermined time period despite outputting a test pulse. A signal indicating that the decrease has not been detected is output to the control circuit 8d.

When the test switch 8e is turned on, the control circuit 8d outputs a signal for instructing the test signal transmitting / receiving section 8c to output a test pulse and relays the signal to the switching circuit 8b. The relay RL1 of the detector 7 is controlled to output a signal instructing to switch the power supply source to the detectors 4 from the receiver 5 to the tester 7. In addition, when a signal indicating that a voltage drop has been detected is input from the test signal transmitting / receiving unit 8c, the control circuit 8d counts the signal and outputs the count value to the number display 8a. I have.

When a signal indicating that the voltage drop has not been detected from the test signal transmitting / receiving section 8c is input from the test signal transmitting / receiving section 8c, the control circuit 8d displays a signal indicating the end of the counting on the number indicator. 8a. The number display 8a has a display capable of displaying a numerical value, and when a count value is input from the control circuit 8d, this is displayed. When a count value is input from the control circuit 8d, the count display 8a blinks the count value. Then, the number display 8a is controlled by the control circuit 8d.
When a signal indicating the end of the test is input from the controller, the number indicating the count value blinking is switched to a continuous normal lighting display instead of blinking.

That is, the number indicator 8a operates when the respective detectors 4... Sequentially operate based on the test pulse as described later, and the test signal transmitting / receiving section 8c detects the above-described voltage drop. Each time a drop in voltage is detected, a numerical value that counts up (a numerical value indicating the number of normally operated detectors 4...) Is blinked. When the tests of all the sensors 4 have been completed and a drop in the voltage cannot be detected, the display of the blinking numerical value is switched to a continuously lit display.

Further, even if the voltage drop cannot be detected due to the presence of the sensor 4 which does not operate normally, the display of the blinking numerical value is switched to the display of continuous lighting. Therefore, when the numerical value of the continuous lighting display matches the number of sensors 4 connected to the repeaters 7, 7, it indicates that all the sensors 4 operate normally in the operation test. , The value that is displayed continuously,
If the number of the sensors 4 connected to the repeaters 7, 7 is less than the number of the sensors 4, the number of the sensors 4 in the arrangement order which is one more than the displayed numerical value from the repeaters 7, 7 side operates normally. To indicate that you did not.

When the connection between the receivers 5 and 5 and the detectors 4 is cut off by the switching circuit 8b and the tester 8 and the detectors 4 are connected, the transfer circuit 8f Are connected to the receivers 5 and 5 instead of. Then, the transfer circuit 8f replaces the detectors 4,.
5 can output a signal indicating the occurrence of a fire, etc.
The operation test of the receivers 5 and 5 can be performed by the transfer circuit 8f.

In the tester 8, the power from the power source 8g is supplied to the connection terminal P9s connected to the switching circuit 8b,
The relay RL1 of the repeaters 7, 7 is supplied to a connection terminal P12s connected to the power supply 8g. Power is supplied to the detectors 4 between the connection terminal P11s connected to the test signal transmission / reception unit 8c and the connection terminal P12s connected to the power supply 8g, and a test pulse is transmitted. . In the tester 8, the power from the power supply 8g is supplied to the connection terminal P10s connected to the transfer circuit 8f and the connection terminal P10s connected to the power supply 8g.
The signal is supplied to the receivers 5 and 5 as a signal between 12 s.

FIG. 6 is a circuit diagram (wiring) of the repeaters 7 and 7.
It shows. As shown in FIG.
7 is a pair of lines 7 connecting the tester 8 and the sensors 4.
a, 7a, a pair of lines 7b, 7b connecting the receiver 5 and the sensors 4,..., a pair of lines 7c, 7c connecting the receiver 5 and the living room receiver 6, A line 7d connected to the alarm device, the relay RL1, and the relay RL;
1, a light emitting diode LED2 connected in parallel with the first relay RL1, and a first contact (switching switch) rl1-1 and a second contact rl1-2 of the relay RL1.

One end of one line 7a of the pair of lines 7a connecting the tester 8 and the sensors 4 is connected to the connection terminal P11t via the first contact rl1-1 of the relay RL1. Connected to the connection terminal P11s of the tester 8 via the connection terminal P11t, and the other end is connected to the connection terminal P1t, and
It is connected to the connection terminal P1k of the sensor via the connection terminal P1t. One end of the other line 7a of the pair of lines 7a connecting the tester 8 and the detectors 4 is connected to a connection terminal P12t via an intersection 7e and via a connection terminal P12t. Tester connection terminal P12
s, and the other end is connected to the connection terminal P2t and to the connection terminal P2k of the sensor 4 via the connection terminal P2t.

One end of one line 7b of the pair of lines 7b connecting the receiver 5 and the sensors 4 is connected to a connection terminal P1t via a first contact rl1-1 of a relay RL1. Connected to the connection terminal P1k of the sensor 4 via the connection terminal P1t, and the other end is connected to the connection terminal P3t and to the connection terminal P3z of the receiver 5 via the connection terminal P3t. It is connected. One end of the other line 7b of the pair of lines 7b connecting the receiver 5 and the sensors 4 is connected to a connection terminal P2t via an intersection 7e and via a connection terminal P2t. Is connected to the connection terminal P2k of the sensor 4 and the other end is connected to the connection terminal P4t, and is connected to the connection terminal P4z of the receiver 5 via the connection terminal P4t.

One end of one line 7c of the pair of lines 7c, 7c connecting the receiver 5 and the living room receiver 6 is connected to a connection terminal P5t, and the connection terminal P5t.
Is connected to the connection terminal P5z of the receiver 5, the other end is connected to the connection terminal P7t, and the connection terminal P7t
Is connected to the receiving unit 6 through the housing. The above receiver 5
One end of the other line 7c of the pair of lines 7c, 7c connecting the housing 6 and the house building receiver 6 is connected to the connection terminal P6t and to the connection terminal P6z of the receiver 5 via the connection terminal P6t. The other end is connected to the connection terminal P8t, and is connected to the living room receiver 6 via the connection terminal P8t.

Line 7d connected to the alarm device of receiver 5
Is connected to the connection terminal P13t, and is connected to the alarm device connection terminal (not shown) of the receiver 5 via the connection terminal P13t, and the other end is connected to the second contact r of the relay RL1.
The terminal is connected to the connection terminal P4t via l1-2, and is connected to the connection terminal P4z of the receiver 5 via the connection terminal P4t. The relay RL1 and the light emitting diode LED2 are arranged between the connection terminal P9t and the connection terminal P12t connected to the tester 8 in parallel with each other, and the tester 8 is connected to the repeater 7 to operate the test SW 8e. In this case, electric power is supplied from the tester 8 side.

The light emitting diode LED2 is connected to the repeater 7
When the test SW 8e is operated, power is supplied from the tester 8 side to cause a current to flow and light is emitted as described above, and the tester 8 is connected to the repeater 7. Indicates that an operation test is being performed at the stage where the is connected. Also, the second contact rl1 of the relay RL1
-2 is a line 7d connected to the alarm device of the receiver 5
The relay RL1 is opened when current is not flowing through the relay RL1, and is closed when current is flowing through the relay RL1.

The sound device of the alarm device of the receiver 5 is turned off with the contact rl1-2 closed, so that the sound device of the receiver 5 does not ring during the test. This is to prevent the sound device from operating during the operation test and causing unnecessary confusion. Relay RL1 above
Of the first contact rl1-1 is a changeover switch,
A state in which no current flows through the relay RL1, that is, a normal state in which the tester 8 is not connected to the repeater 7, or a state in which the tester 8 is still connected to the repeater 7 and the test SW8
In a state in which e is not operated, the connection between the connection terminal P3t and the connection terminal P1t is made conductive to connect the receiver 5 and the sensors 4 and disconnect the connection between the connection terminal P11t and the connection terminal P1t. State.

Further, a state in which a current flows through the relay RL1,
That is, when the tester 8 is connected to the repeater 7 and the test is being performed, the connection terminal P3t and the connection terminal P1t are disconnected, and the receiver 5 and the detectors 4 are disconnected and connected. The tester 8 is connected to the detectors 4 with the terminal P11t and the connection terminal P1t in a conductive state. As shown in FIG. 1, a display 7f indicating the number of sensors connected to the repeater 7 is provided on the surface of the repeater 7. That is, in FIG. 1, "3" is displayed in front of the repeater 7 to which the three sensors 4 are connected. Further, the number display 7f does not need to use a device such as a display, and may simply indicate a number on the surface of the repeater 7 or affix a sheet on which the number is written.

Next, an operation test method of the detectors 4 in the fire alarm system having the above-described configuration will be described with reference to FIGS. 1 to 6 and a timing chart shown in FIG. When performing the operation test of the sensors 4 of the dwelling units 1 and 2, first, as shown in FIG. 1, the tester is mounted on the repeater 7 of the dwelling unit 1 where the sensors 4 to be subjected to the operation test are arranged. 8 is connected. In this case, since the repeater 7 is provided outside the dwelling unit 1, it is not necessary to enter the dwelling unit 1.

The switching circuit 8 is connected to the power supply 8g of the tester 8.
The connection terminal P9s of the repeater 7 to which the relay RL1 and the light emitting diode LED2 are connected is connected to the connection terminal P9s connected to the connection terminal P9s through the connection terminal P9s. Terminal P of the container 7
12t, and when the test switch 8e is operated to operate the switching circuit 8b, the light emitting diode LE
Power is supplied from the tester 8 to D2 and the relay RL1, and a current flows.

Then, the light emitting diode LED2 emits light to indicate that the operation test is being performed, and the relay R
The first contact point rl1-1 of L1 is switched from the receiver 5 side to the tester 8 side, and the tester 8 and the sensors 4 are connected.
That is, the test signal transmission / reception unit 8c is connected to the power supply 8g of the tester 8.
The connection terminal P11s of the repeater 7 is connected to the connection terminal P11s connected via the connection terminal, the connection between the connection terminal P11t and the connection terminal P1t is made conductive in the repeater 7, and the connection terminal of the repeater 7 is connected. Since P1t is connected from the repeater 7 to the connection terminal P1k of the first sensor 4 via the line 4a, the connection terminal P11s of the tester 8 and the connection terminal P1k of the sensor are connected via the repeater 7. It will be in the connected state.

Further, the tester 8 is connected to the repeater 7 and the test S
When W8e is operated, the connection terminal P12s connected to the power supply 8g of the tester 8 and the connection terminal P2 of the first sensor 4
k is connected via the repeater 7. When the second contact rl1-2 of the relay RL1 is closed, the sound device of the receiver 5 is stopped.

When the test switch 8e of the tester 8 is turned on, the relay RL1 is controlled as described above to connect the detectors 4 to the tester 8, and the test signal is sent from the control circuit 8d. A signal for transmitting a test pulse to the transmission / reception unit 8c is output. As shown in “Test pulse” in FIG. 7, the signal is set in advance to the detectors 4 via the repeater 7 from the test signal transmission / reception unit 8c. A test pulse having a voltage, a pulse width, and a cycle is output. That is, a test pulse that changes from high to low is repeatedly output while power is supplied from the tester 8 to the sensors 4 via the repeater 7 at a preset voltage.

Then, of the plurality of sensors 4 arranged in a line on the pair of lines 4a, 4a, the first sensor 4 having the shortest distance on the lines 4a, 4a to the repeater 7 is used. , The test pulse detection circuit 4b detects the first test pulse as the first test pulse. In the pulse canceling circuit 4e, the voltage applied to the capacitor C1 drops due to the input of the test pulse, and the capacitor C1
Discharges the stored electric charge as shown in “discharge of the capacitor of the sensor 1” in FIG.

As a result of this discharge, in the sensors 4 arranged closer to the terminator 9 than the first sensor 4, as shown in the "pulses entering the sensors 2 to 4" in FIG. The test pulse is canceled by the discharge of the capacitor C1,
The test pulse detection circuit 4b of the second and subsequent detectors 4 cannot detect the test pulse. In addition, in the first sensor 4, after the test pulse detection circuit 4b detects the test pulse, a signal is output to the fire detection circuit 4c to instruct the fire detection circuit 4c to pseudo-fire.

When the fire detection circuit 4c operates normally when the fire detection circuit 4c is simulated when a fire occurs, the fire detection circuit 4c switches from the fire detection circuit 4c to the display circuit 4d.
Current flows through the base of the transistor TR1 for a moment, and the transistor TR1 is momentarily turned on. When the transistor TR1 is turned on, a current flows through the light-emitting diode LED1 and the Zener diode ZD, and the light-emitting diode LED1 shines, and based on the constant voltage value of the Zener diode ZD, the display circuit 4
The voltage at d drops.

Then, in the test signal transmitting / receiving section 8c, the "reception voltage" shown in FIG. 7 decreases and detects this. Then, a signal indicating that the voltage has dropped is output to the control circuit 8d. The timing of the voltage drop in the display circuit 4d, that is, the fire detection circuit 4c
The timing at which the current flows from to the base of the transistor TR1 of the display circuit 4d is when one test pulse ends as shown in the portion where the voltage of the "reception voltage" drops in FIG.
It is after the voltage rises. In addition, fire detection circuit 4
The interval at which a current flows from c to the base of the transistor TR1 of the display circuit 4d is shorter than the interval between test pulses, as shown in the portion where the voltage of "reception voltage" drops in FIG.

Then, the control circuit 8d, to which the signal indicating the voltage drop is input, counts this and outputs the count value to the number display 8a. At this stage, since the voltage drop has been detected first, the count value in the control circuit 8d becomes 1, and the number display shows 1
Flashes. On the other hand, in the pulse canceling circuit 4e, when the voltage input to the sensor 4 increases after the first pulse, as shown in the "test pulse" in FIG.
A current is continuously applied to the base of the capacitor C2 to prevent a voltage from being applied to the capacitor C1 again.

Therefore, in the pulse canceling circuit 4e, after canceling the first input pulse, no charge is stored in the capacitor C1 and the capacitor C1 cannot be discharged. Do not cancel the pulse. Next, as shown in the “test pulse” of FIG. 7, the second test pulse is output from the test signal transmitting / receiving section 8c. At this time, the test pulse is also detected in the test pulse detection circuit 4b of the first sensor 4 as shown in "Pulse entering sensor 1" in FIG. In the detector 4, the second and subsequent pulses are ignored.

Then, in the second sensor 4 arranged next to the first sensor 4, the first test pulse is canceled as shown in "Pulse entering sensor 2" in FIG. After that, the second test pulse will be input as the first test pulse. At this time, the second detector 4
Is a capacitor C1 similar to the first sensor 4 described above.
Is discharged to cancel the second pulse to the third and subsequent detectors 4 and 4, and the fire detection circuit 4c is set to a pseudo fire state, and the fire detection circuit 4 operates in the event of a fire. Is normally performed, the above-described voltage drop occurs in the display circuit 4d.

In the tester 8, the test signal transmitting / receiving section 8c detects the voltage drop and outputs a signal indicating the detection to the control circuit 8d. The control circuit 8 to which the signal is input
In d, the count value is incremented (+1), the count value is set to 2, and the count value is output to the number display 8a. Then, the count display 8a blinks the count value of 2 in a blinking manner.

Next, the third and subsequent test pulses are output. In this case, as in the case of the first and second detectors 4 and 4, the third and subsequent test pulses are output. The detector 4 sequentially discharges the capacitor C1, cancels the test pulse, and sets the fire detection circuit 4c to a pseudo-fire state when the fire detection circuit 4c operates normally. The test signal transmission / reception unit 8c detects this, and the control circuit 8d counts the number of detections, and counts the counted value to a number display 8a.
Blinks.

Then, the test pulse is detected in the last sensor 4 farthest from the terminator 9. In FIG. 7, four detectors are arranged in a row in the repeater 7.
, And when the fourth test pulse is output, the last sensor 4 detects the test pulse. Therefore, after the last sensor 4 detects the test pulse, a voltage drop is detected in the tester 8 and 4 is displayed on the number display blinking. Then, the fifth test pulse is output from the tester 8, but since all the sensors 4 have finished the test, after the fifth test pulse is output,
No voltage drop occurs in the reception voltage of the test signal transmission / reception unit 8c as shown in FIG.

The test signal transmitting / receiving section 8c outputs to the control circuit 8d a signal indicating that the voltage drop cannot be detected at a predetermined timing. Then, the control circuit 8d to which the signal is input outputs a signal for instructing the number display 8a to make the blinking numerical value to be continuously lit. Therefore, in the number display 8a, the blinking count value, that is, 4, is a continuous lighting display.

The number of the sensors 4 connected to the repeater 7 is displayed on the surface of the repeater 7 as described above. Here, the number of the sensors 4 in the timing chart of FIG. Since it was 4, "4" is displayed on the repeater. That is, since the numerical value displayed on the repeater and the numerical value continuously lit on the number display 8a of the tester 8 match, this indicates that all the sensors operate normally.

If an operation test is performed and there is a sensor 4 that does not operate normally, a voltage drop does not occur when the order of the detectors 4 is changed. The transmission / reception unit 8c cannot detect a voltage drop. Therefore, in this case, the test signal transmitting / receiving unit 8c outputs a signal indicating that the voltage drop has not been detected to the control circuit 8d.

Then, the control circuit 8d operates the number display 8a.
A signal indicating that the operation test has been completed is output to the number indicator 8a, and the number indicator 8a indicates the count value currently blinking, that is, the number up to the sensor 4 before the sensor 4 that did not operate normally. Display continuously. Therefore, the numerical value displayed continuously is smaller than the number of all the sensors 4 connected to the repeater 7 displayed on the surface of the repeater 7,
Can be recognized as having an abnormality.

As described above, in the fire alarm system of this example, the test pulse is output from the tester 8 side, and the sensor 4 which first receives the test pulse 8 cancels the pulse by discharging the capacitor C1. Other sensors 4
Are not made to respond to the test pulse, so that the sensors 4 can be operated in order without providing the sensors 4 with a transmission IC or assigning an address.

Therefore, without entering the place where the sensors 4 are installed, the operation test is performed by setting the sensors 4... In a simulated fire state by the operation from the tester 8 side. Can be constructed at relatively low cost.

The detectors 4 include delay means (input signal forming circuit IN and logic circuit LG of the test pulse detection circuit 4b) for delaying the timing from the input of the test pulse to the occurrence of the pseudo fire detection state. Is provided, the timing of the process of outputting the test pulse and the process of receiving the signal from the sensor 4 can be shifted on the tester 8 side. Further, the test pulse output from the tester 8 and the signal output from the sensor 4 are transmitted through the same line 4a. However, since these signals do not overlap due to the action of the delay means, a particularly advantageous effect is obtained. It is a target.

Since the detectors 4 are provided with a time limit circuit TF for limiting the occurrence of a simulated fire state based on the input of a test pulse to a predetermined time, the simulated fire detection state is reliably generated. In addition to the above, it is possible to prevent the false fire detection state from continuing more than necessary, which is convenient when sequentially testing the plurality of sensors 4 connected to the line 4a. That is, it is possible to alternately set the plurality of detectors 4 to a pseudo fire detection state, and to avoid simultaneous output of fire signals from the plurality of detectors due to the pseudo fire detection state. It is.

Further, as described above, the number indicator 8a of the tester 8 sequentially blinks the number of the normally operated sensors 4..., And continuously blinks the numerical value blinked when the operation test is completed. When there is a sensor 4 that does not operate normally while being turned on and displayed, a number smaller than the actual number of the sensors 4 is continuously turned on and displayed. Thus, whether the test is being performed or the test has been completed can be easily confirmed visually, and whether or not the sensor 4 has an abnormality can be easily recognized based on the number displayed continuously.

In the above-described example, the sensors 4 are connected in a row to one repeater 7. However, a plurality of rows of the sensors 4 may be connected to one repeater 7. good. However, in this case, the above-described operation test needs to be performed for each column. Further, in the above example, the voltage drop by the display circuit 4d is a signal indicating that the sensor 4 has operated normally. However, a signal indicating that the sensor 4 has operated normally is output by another method. You may do it.

In the above example, the capacitor C1 is used to increase the voltage so as to cancel the pulse. However, the voltage may be increased so as to cancel the pulse by another method. In the above example, the tester 8 is detachably connected to the repeater 7. However, the tester 8 may be built in the repeater 7 or the living room receiver 6.

In the above example, the receivers 5 and 5 are provided for each dwelling unit 1 and 2 and the receivers 5 and 5 are connected to the dwelling unit receiver 6 via the repeaters 7 and 7. However, each sensor 4... May be connected to the living building receiver (one receiver 5) 6. In this case, the tester 8 is connected to the house building receiver 6 or built in the house building receiver 6, and each of the dwelling units 1 and 2 is provided with a It is necessary to arrange an alarm system to notify. Further, the tester 8 is provided with comparing means for comparing the number of the sensors 4... Connected to the tester 8 with the number of signals counted by the control circuit 8d. Alternatively, if the two numbers do not match, it may be notified that there is an abnormality.

[Second Embodiment] The fire alarm system of this embodiment has substantially the same configuration as that of the fire alarm system of the first embodiment, and is provided with a sound output means in a tester. Only the point is different. Therefore, the same components are denoted by the same reference numerals and description thereof will be omitted.

FIG. 8 is a block diagram showing a circuit configuration of a tester 18 unique to the second embodiment. Like the tester 8 of the first embodiment, the tester 18 includes a number indicator 8a, a switching circuit 8b, a test signal transmitting / receiving section 8c, a control circuit 8d, a test switch (SW) 8e, a transfer circuit 8f, In addition to having a power supply 8g, the apparatus further includes an acoustic device 8h as sound output means.

The acoustic device 8h includes the detectors 4, 4, 4,...
The control circuit 8d also notifies the respective states from the start to the end of the operation test by sound output, and also serves as sound output control means.
And outputs a sound corresponding to the signal.

Next, the operation of the above acoustic device 8h will be described. FIG. 9 is an explanatory diagram for explaining the operation of the acoustic device 8h during the operation test of the sensor.

First, when the tester turns on the test switch 8e at the start of the test, a signal indicating the start of the test is output from the test switch 8e to the control circuit 8d (indicated by the reference numeral in FIG. 9). The control circuit 8d controls the test switch 8
e, outputs a signal instructing the test signal transmitting / receiving unit 8c to output a test pulse, based on the signal from e.
Start sound signal indicating start of test (third sound output signal)
Is output to the audio device 8h. With this start sound signal, a start sound for starting the test is output from the acoustic device 8h.

If the detectors 4 connected to the tester 18 are normal, a predetermined time elapses after the test pulse is transmitted from the tester 18 and the detector 4 that has received the test pulse
Sends a fire signal indicating that the test result of the sensor 4 is normal. Then, this fire signal is received by the signal tester 18 (indicated by reference numerals in FIG. 9). As described in the explanation of each signal shown in FIG. 7, this fire signal is a signal based on the voltage dropped by the display circuit 4d of the sensor 4, and the voltage drops by a predetermined interval between two test pulses. It is the signal that is being done.

When the fire signal is transmitted to the tester 18, the fire signal is detected by the test signal transmission / reception section 8c, and a first detection signal indicating that the fire signal has been received is output to the control circuit 8d. . The control circuit 8d outputs a normal sound signal (first sound output signal) indicating that the test result of one sensor 4 is normal to the sound device 8h based on the first detection signal, and The device 8h outputs a first notification sound indicating that the individual test of the sensor 4 has been completed and is normal.

Thereafter, as long as the sensors 4 are normal, all the sensors 4... Connected to the tester 18 are transmitted from the transmission of the test pulse to the reception of the fire signal and the output of the first sound signal. Each process is similarly repeated.

If any of the sensors 4... Connected to the tester 18 are abnormal, or if all the sensors 4 have been tested, a test pulse from the tester 18 is transmitted. Even if the predetermined time has elapsed, the fire signal is not sent from the sensor 4. That is, a high signal having no voltage drop is received by the tester 18 (indicated by reference numerals in FIG. 9).

When the tester 18 receives the high signal having no voltage drop, the test signal transmitting / receiving section 8c detects the high signal (detects that no fire signal is sent within a predetermined time). And outputs a second detection signal indicating that the fire signal is not received to the control circuit 8d. Based on the second detection signal, the control circuit 8d determines whether the test result of one of the detectors 4 is abnormal or that the test of all of the connected detectors 4 is completed. Second
Is output to the audio device 8h, and a second notification sound indicating that the individual test of the sensor 4 has been terminated from the audio device 8h and that the test has ended, or that the test has ended, is output from the audio device 8h based on the end sound signal. Is output.

The start sound, the first notification sound, and the second notification sound are different sounds, and the tester hears these sounds and tests the operation of the detectors 4, 4, 4,... Each state from the start to the end of, that is, the state of the test start,
It is possible to confirm a state where a normal test result is detected for each sensor 4, a state where an abnormal test result is detected for each sensor 4, or a state where the test is completed.

Note that the sound output pattern output from the acoustic device 8h of the tester 18 is not limited to the above-described one.
It is also possible to output different sounds depending on the number of the sensors 4 tested. Further, the control circuit 8d is made to recognize the number of the sensors 4 in advance, and when the second detection signal is inputted, it is determined whether the signal indicates an abnormality of the sensors 4 and the end of the test. If it is possible to determine whether or not the sensor 4 indicates an abnormality, when the abnormality of the sensor 4 is found or when the test is completed, different sounds are output, and the abnormality of the sensor 4 is found and the test is performed. The end may be notified.

[0129]

According to the fire alarm system according to the first aspect of the present invention, each of the detectors cancels the test pulse output from the tester in turn, so that each of the test pulses has a different one of the detectors on the line. Since the operation of each sensor can be tested one by one according to the arrangement order, the signals are not confused and the cost can be easily reduced at a low cost without assigning an address to each sensor or providing a transmission IC. An operation test of the sensor can be performed.

According to the fire alarm system of the second aspect of the present invention, the function of the pulse canceling means can be realized by a simple method of discharging the electric charge stored in the capacitor.

According to the fire alarm system of the third aspect of the present invention, when the signal is not received by the receiving means within a preset time after the test pulse is output from the pulse output means, the operation is performed. If the test is completed, the display state will change at the stage when the operation test is completed, and the end of the operation test can be visually judged and the numerical value whose display state has changed is detected by the sensor connected to the tester. Whether or not there is a sensor that does not operate normally can be recognized based on whether or not it matches the number of devices.

According to the fire alarm system of the fourth aspect of the present invention, the number of sensors connected to the tester displayed near the display means is easily compared with the number displayed on the display means. Therefore, it is possible to easily and surely check whether there is a sensor that does not operate normally.

According to the fire alarm system according to the fifth aspect of the present invention, in the apartment house, when performing the above operation test, the tester is connected to a repeater arranged outside the dwelling unit, so that the inside of the dwelling unit can be connected. Is connected to the tester, so that the operation test can be performed from the outside of the dwelling unit as described above even if the receiver in the dwelling unit is arranged. In addition, if the tester is connected to the repeater, the operation test of the sensor only needs to transmit and receive signals between the tester and the sensor via the repeater. The operation test of the sensor can be easily performed at low cost.

According to the fire alarm system of the sixth aspect of the present invention, the sound output of the sound output means allows the tester to confirm by the sound output that the state of the tester is in the operation test of the sensor. Testing can be performed.

According to the fire alarm system of claim 7 of the present invention, the tester confirms that the state of the tester is during the operation test of each sensor and that the test result of each sensor is normal. The test can be performed while each state at the time of the operation test, such as the fact that the test result is abnormal or the operation test has been completed, is visually confirmed.

According to the fire alarm system of claim 8 of the present invention, the tester can confirm each state of the operation test,
The start of the operation test can also be confirmed by hearing.

According to the fire detector of the ninth aspect of the present invention, a pseudo fire detection state can be generated in the fire detector by inputting a test pulse. By connecting a wire that can be input (for example, a line connected to a receiver), a pseudo fire detection state is generated in the fire detector by remote control, and the fire detector is tested from a remote location. I can do it.

According to the fire detector of the tenth aspect of the present invention, since the timing from the input of the test pulse to the occurrence of the pseudo fire detection state is delayed by the delay means, the detector is tested. On the side, the processing for outputting the test pulse and the test processing for determining whether or not the sensor has normally operated can be performed at a different timing. In other words, the two processes are performed not at the same time but at different timings, thereby simplifying the process of testing the sensor. In the case where the line for inputting the test pulse and the line to which the fire signal is sent from the detector are the same, the transmission timing of the test pulse and the fire signal is shifted so that they do not overlap. It is.

According to the fire detector according to claim 11 of the present invention, since the output of the pseudo fire signal based on the input of the test pulse is output for a predetermined time, it is possible to surely generate the pseudo fire detection state. In addition, it is possible to prevent the false fire detection state from continuing more than necessary. Therefore, it is possible to set a time reference for the test of the fire detector, or to set a plurality of detectors to be in a false fire detection state alternately when testing a large number of detectors. Therefore, the process of testing the sensor can be simplified. Further, when a plurality of sensors are connected to the same line, it is possible to avoid a situation where fire signals due to pseudo fire detection are simultaneously output from the plurality of sensors and overlap with each other, which is particularly effective.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an overall configuration of a fire alarm system according to an example of an embodiment of the present invention.

FIG. 2 is a block circuit diagram showing a sensor of the fire alarm facility of the above example.

FIG. 3 is a block diagram illustrating a circuit configuration of a test pulse detection circuit in FIG. 2;

FIG. 4 is a block diagram illustrating a circuit configuration of a fire detection circuit in FIG. 2;

FIG. 5 is a block circuit diagram showing a tester of the fire alarm facility of the above example.

FIG. 6 is a block circuit diagram showing a repeater of the fire alarm facility of the above example.

FIG. 7 is a timing chart for explaining an operation test method of the detector in the fire alarm facility of the above example.

FIG. 8 shows a tester 18 unique to the second embodiment of the present invention.
FIG. 3 is a block diagram showing a circuit configuration of FIG.

FIG. 9 is an explanatory diagram for explaining an operation of the acoustic device during an operation test of the sensor.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Dwelling unit of apartment house 2 Dwelling unit of apartment house 4 Sensor 4a Line which connects a detector in a line 4b Test pulse detection circuit (pulse detection means, test control means, delay means) 4c Fire detection circuit SN sensing part R8 1st Resistor R10 Second resistor TH1 Thermal element RG 3-terminal regulator (voltage applying means) DT Fire detector TR4 Transistor (switch means) TF Timed circuit (timed means) 4d Display circuit (transmitting means) 4e Pulse canceling circuit (pulse canceling means) , Test control means) C1 capacitor 5 receiver 6 living room receiver 7 repeater 7f display of the number of sensors 8 tester (first embodiment) 8a number display (display means) 8c test signal transmission / reception section ( 8d control circuit (counting means, display control means, sound output control) Means) 18 Tester (Second Embodiment) 8h Sound Device (Sound Output Means)

Continuation of the front page (72) Inventor Jinichi Abe 1-11-6 Hatagaya, Shibuya-ku, Tokyo Inside Nittan Co., Ltd. (56) References JP-A-1-276296 (JP, A) JP-A-62-25400 (JP, A) Japanese Utility Model 7-20689 (JP, U) Japanese Utility Model 7-13091 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G08B 17/00 G08B 23 / 00-31/00

Claims (11)

(57) [Claims] 1. A test having a plurality of sensors connected in a line to a receiver by a continuous line, connected to the sensors via the lines, and performing an operation test of the sensors. A fire alarm system having a detector, wherein the tester includes a pulse output unit that repeatedly outputs a test pulse to each sensor via the line, and a pulse output unit that outputs the test pulse from the sensor that has been normally operated. Receiving means for receiving a signal, and counting means for counting the number of times the signal is received by the receiving means. The sensor detects a pulse output from a pulse output means of the tester. A pulse detection means, when a pulse output from the pulse output means of the tester is first input to the sensor, the tester is higher than the sensor to which the pulse is input on the line. Pulse canceling means for canceling the pulse so that the pulse is not input to another sensor connected to the opposite side; and when the pulse detecting means detects a pulse for the first time, the sensor is simulated in a fire occurrence state. Test control means, and a transmission means for outputting a signal to a reception means of the test device when the sensor is in a pseudo-fire state and operates normally. Fire alarm equipment. 2. The pulse output means of the tester decreases a voltage applied to the sensor as the pulse via the line, and the pulse canceling means includes a voltage applied to the sensor. The fire alarm system according to claim 1, further comprising a capacitor that discharges a charge so as to cancel the voltage drop when the voltage drops for the first time. 3. A display means for displaying a count value counted by said counting means, and a signal is not received by a receiving means within a preset time after a pulse is output from said pulse output means. Display control means for outputting a signal to the display means, wherein the display means changes the display state of the displayed numerical value when receiving a signal from the display control means. The fire alarm system according to 1 or 2. 4. The fire alarm system according to claim 3, wherein the number of detectors connected to the tester is displayed at a position near the display means. 5. A dwelling unit in which the receiver and a sensor connected to the receiver are arranged in each dwelling unit of the apartment house, and connected to each of the receivers arranged in each dwelling unit. A receiver and a repeater that is disposed outside the dwelling unit for each dwelling unit and connects the receiver and the dwelling receiver are provided, and the tester is detachably attached to the repeater. 5. The connection device, wherein the repeater connects a tester and a sensor connected to the repeater.
The described fire alarm equipment. 6. The apparatus according to claim 1, wherein said tester is provided with a sound output means for outputting a sound capable of identifying that an operation test of the sensor is being performed. The described fire alarm equipment. 7. The tester includes: first detector for detecting that a test result of one sensor is normal based on the reception of the signal by the receiver; and output of the test pulse. A second sensor for detecting that the test result of one sensor is abnormal or that the test of all connected sensors is completed based on the fact that no signal is received by the receiving means within a predetermined time from Detecting means for outputting a first sound output signal to the sound output means based on the detection of the first detection means, and outputting a second sound output signal to the sound output means based on the detection of the second detection means 6. A fire alarm system according to claim 5, further comprising: a sound output control unit that outputs a signal, wherein the sound output unit performs a sound output corresponding to the sound output signal output from the sound output control unit. . 8. The tester is provided with a test start switch for starting a test of a sensor and causing the pulse output means to start outputting a pulse. The sound output control means includes an on signal of the test start switch. 8. The fire alarm system according to claim 7, wherein a third sound output signal is output to the sound output means based on the following. 9. A thermal sensor having a thermal element whose resistance value changes according to an ambient temperature and generating a pseudo fire detection state by inputting a test pulse, wherein the thermal element and a first resistor are provided. Are connected in series, voltage applying means for applying a predetermined voltage to the heat sensitive part, fire detecting means for detecting a fire based on a potential at a connection point between the heat sensitive element and the first resistor, A second resistor connected in parallel with the first resistor; a switch for closing / opening the connection between the first resistor and the second resistor by turning on / off; and a switch for monitoring a fire. And a test control means for turning on the switch means based on the input of the test pulse. 10. A fire detector for generating a pseudo fire detection state by inputting a test pulse, comprising: a fire detector for detecting a fire; and a fire detector for causing the fire detector to detect a pseudo fire. A simulated fire signal output unit for outputting a simulated fire signal; test control means for outputting the simulated fire signal based on the input of the test pulse; and a delay for delaying a timing from the input of the test pulse to the output of the simulated fire signal. And a fire detector. 11. A time limiter for outputting the pseudo fire signal only for a predetermined time, wherein the fire detection unit detects a pseudo fire while the pseudo fire signal is being input, The fire detector according to claim 10, wherein the detection of the pseudo fire is terminated when the input of the pseudo fire signal is interrupted.