JPH03222096A - Fire alarm system with operation testing function and analog sensor used therein - Google Patents

Abstract

PURPOSE:To early detect the failure of a sensor by executing the operation test of the connected analog sensor efficiently in a short period only with switching to a monitoring mode by mode switching operation. CONSTITUTION:In the case a mode changeover switch 13a of a mode switching device 13 of a receiver 1 is operated and switched to a monitoring mode, when monitoring by the polling of all sensors connected to respective sensor circuits ls delivered from a repeater 2 is finished, a signal processing circuit 20 attaches a repeater address set at an address setting part 22 to the alarm discriminated result data of a temporary memory 23 of the respective repeaters 2 and transmits them to a receiver 1 side by a multiplex signal. Then, at the receiver 1 side, the result data are received by the signal processing circuit and are stored in a memory 14, necessary signal processing is executed, an alarm device 15 is driven and necessary alarm indication and alarming are executed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a fire alarm system having an operation test function and an analog sensor used in this system. The fire alarm system is characterized by testing the operation of each sensor.

[Conventional technology] Conventional fire alarm systems using analog detectors are
A fire receiver and a plurality of repeaters are connected by multiple signal lines, a sensor line is led out from each repeater, and a large number of analog sensors are connected to this sensor line.

In such a system, a fire receiver sequentially outputs a monitoring start signal to each repeater, and in the example of a repeater, upon receiving this monitoring start signal, each detector is polled and accessed to sequentially send a monitoring signal using multiplexed signals. The alarm is determined by receiving the return signal containing the digital data (data converted from an analog detection signal corresponding to the ambient temperature to digital data) sent back from each sensor and sequentially determining whether the alarm has occurred. The result data is transmitted to the receiver side and necessary processing such as warning I [3 notification] is performed.

However, such a fire I! i! It was necessary to conduct operational tests when constructing the system, but each analog sensor had to be activated one by one, which was a large-scale and time-consuming task.

Furthermore, after the system was put into operation, similar operational tests were conducted periodically, making it impossible to detect malfunctions in the analog sensors at an early stage, and improvements were desired.

[Problems to be Solved by the Invention] The present invention, proposed in view of the above circumstances, provides a fire alarm system that improves reliability by allowing operation tests of each analog sensor to be performed in a simple manner and in a short time. and analog sensors.

[Means for Solving the Problems] The present invention according to claim 1 proposed to achieve the above object is characterized in that a fire receiver transmits and receives data using multiplexed signals to and from a repeater. For each sensor connected to the sensor line derived from the above-mentioned repeater, the multiplex transmission control unit for a sensor information setting means for manually setting test standard data to be transmitted and sensor information such as each discrimination level of forecast, fire alarm, interlocking alarm, and the above-mentioned sensor information set by the sensor information setting means; a monitoring mode for issuing an alarm in response to alarm determination result data obtained by discriminating reply signals sent back from each sensor in the repeater example; A mode with a mode changeover switch for switching between a test mode in which the operating status of each sensor is displayed and an abnormality notification is performed based on the test discrimination result data obtained by discriminating the reply signals sent back from each sensor. When in the monitoring mode, the switching means receives the alarm determination result data of each sensor sent back via each repeater and displays an alarm and sounds an alarm, while in the test mode, the switching means displays the alarm and sounds an alarm. An alarm notification means for displaying an abnormality and sounding an alarm in response to the test discrimination result data of each sensor sent back via each repeater, as well as signal processing for each part, and when starting the system, the above The sensor information stored in the memory means is sequentially transmitted to the repeater example via the multiplex transmission control unit by a multiplex signal with a repeater address attached, while in the monitoring mode, the sensor information is relayed via the multiplex transmission control unit. A monitoring start signal with a device address attached thereto is sequentially outputted to the repeater example using a multiplexed signal, and in the test mode, a test start signal attached with a repeater address is outputted to the repeater example sequentially using a multiplexed signal via the multiplex transmission control section. The repeater includes a multiplex transmission control unit for transmitting and receiving data using multiplexed signals to and from the receiver, and a repeater address unique to the repeater. Sensor line multiplexing for sending and receiving data using multiplexed signals between an address setting section for setting and multiple sensors provided for each sensor line and connected to each sensor line. A transmission control unit and, at the time of system startup, sequentially capture information corresponding to the sensor connected to the derived sensor line from among the sensor information stored in the memory means on the receiver side. In the above-mentioned monitoring mode, the system memory temporarily stores the alarm determination result data obtained by discriminating the reply signal sent back from each sensor, while in the above-mentioned test mode, A temporary memory for temporarily storing test discrimination result data obtained by discriminating reply signals sent back from each sensor, and a temporary memory provided for each sensor line,
In the above-mentioned monitoring mode, a monitoring signal for monitoring the alarm status of each sensor connected to each sensor line is received, and a monitoring signal in the form of a multiplexed signal is sent to each sensor line via the sensor line multiplex transmission control section. In addition to sequentially outputting signals to the sensors by polling, it also receives and deciphers the multiplexed signals sent back from these sensors.In the test mode, it also tests the operation of each sensor connected to each sensor line. Upon receiving the test signal to perform the test, the test signal in the form of a multiplexed signal is sequentially outputted to each sensor by polling via the sensor line multiplex transmission control unit, and the reply signal in the form of the multiplexed signal is sent back from these sensors. a sensor line signal processing circuit that receives and decodes the sensor line signal processing circuit; and in the monitoring mode, receives a monitoring start signal transmitted from the receiver side via the multiplex transmission control unit, and stores the sensor information in the system memory. Among these, a monitoring signal with at least a line number and a sensor address is sequentially transmitted to the sensor side via the sensor line signal processing circuit, and digital data corresponding to the ambient temperature is returned from the sensor side. The alarm status is determined by receiving the received reply signal and comparing this digital data with the forecast, fire alarm, and interlocking discrimination levels stored in the system memory, and the determined alarm discrimination result. Store the data in the above temporary memory,
After monitoring each sensor by polling in this way, an operation is performed to transmit the alarm determination result data of each sensor stored in the temporary memory to the receiver side via the multiplex signal line. While repeating the test, in the test mode, a test start signal transmitted from the receiver side via the multiplex transmission control unit is received, and at least the line number, A test signal with test reference data attached corresponding to the sensor address and analog value is sequentially transmitted to the sensor side via the sensor line signal processing circuit, and a reply containing digital data is sent back from the sensor side. After receiving the signal, it is determined whether the test reference data attached to the test signal matches the digital data of the reply signal, and the determined test discrimination result data is sequentially stored in the temporary memory. and a signal processing circuit that transmits the test discrimination result data of each sensor stored in the temporary memory to the receiver side via the multiplex signal line after the operation test of the sensor is completed. has been done.

In this way, this system is configured so that the signal processing circuit of the repeater concentrates the signal processing such as determining whether the sensor is firing. It is also possible to transfer and store the sensor information in advance in the transmission memory of the corresponding sensor line, and to perform distributed processing on the signal processing circuits of each sensor line, such as determining whether the sensor is firing. This is possible, and with such a configuration, the burden on the signal processing circuit can be reduced.

The present invention according to claim 2 is characterized in that the repeater determines whether the test reference data attached to the test signal matches the digital data of the fA signal in the signal processing circuit, and at the same time It is configured to determine whether the time required from outputting a test signal from the sensor to receiving a reply signal from the sensor via the sensor line signal processing circuit is within a predetermined time. ing.

In a third aspect of the present invention, the mode switching means of the fire receiver is configured to automatically switch to the test mode at predetermined intervals.

In the present invention as set forth in claim 4, the mode switching means on the side of the fire receiver is removed, and instead, the signal processing circuit of the repeater automatically switches to the test mode at every predetermined period. The configuration is such that it can be switched.

Further, the analog sensor of the present invention according to claim 5 includes a multiplex transmission control unit for transmitting and receiving data using multiplexed signals to and from the repeater via the sensor line, and a sensor-specific an address setting section for setting an address; a temperature detection means having a heat sensitive element whose electric resistance value changes according to the ambient temperature and outputting an analog detection signal according to the surrounding temperature; an A/D conversion circuit that converts the analog detection signal output from the sensor circuit into corresponding digital data; a memory section that stores at least the data necessary for signal processing; From the example, if the sensor address attached to the transmitted monitoring signal matches the address set in the address setting section above,
the A/D in response to at least the analog detection signal;
While sending a reply signal in which the sensor address set by the address setting unit is attached to the digital data output from the conversion circuit to the repeater via the multiplex transmission control unit,
If the sensor address attached to the test signal transmitted from the repeater via the sensor line matches the address set in the address setting section, the test attached to the test signal is and a signal processing circuit that sends back a reply signal in which the same digital data as the reference data is appended with at least the sensor address set by the address setting part to the repeater via the multiplex transmission control part. ing.

[Operations] In the present invention as set forth in claim 1, for each sensor connected to the sensor line derived from the middle 1A device, the connected line number, sensor address, sensor type, and operation test are provided. test reference data and forecasts that are sometimes transmitted along with test signals;
The sensor information for each alarm discrimination level of fire alarm and interlock alarm is manually set by the sensor information setting means of the receiver, and the set sensor information is stored in the memory means via the signal processing@route. . When the system is started, the signal processing circuit on the receiver side sends a multiplex signal to the multiplex transmission control unit by adding the repeater address of the repeater to which the sensor is connected to the information of each sensor stored in the memory means. to each repeater via. In each repeater example, sensor information is received and decoded by the signal processing circuit via the multiplex transmission control unit, and the sensor information having the same address as the repeater address set in the address setting unit is sequentially stored in the system memory. When all the sensor information is transferred to the system memory of each repeater, the mode switching means of the receiver sets the monitoring mode.

When switched to the monitoring mode, the signal processing circuit of the receiver sequentially outputs a monitoring start signal with the repeater address attached to the repeater via the multiplex transmission control unit as a multiplexed signal,
In the repeater example, this monitoring start signal is received by the signal processing circuit, and from among the sensor information stored in the system memory, the monitoring signal with the line number and sensor address attached is transmitted to the sensor line signal processing circuit side. Then, the sensor line signal processing circuit that receives the monitoring signal with the corresponding line number transmits this monitoring signal to each sensor side sequentially using a polling method as a multiplexed signal via the sensor line multiplex transmission control unit. do. In response to this monitoring signal, a reply signal containing digital data corresponding to the ambient temperature returned from each sensor side is received and decoded by the sensor line signal processing circuit via the sensor line multiplex transmission control unit. This reply signal is sent back to the signal processing circuit. The signal processing circuit processes the digital data of the returned response signal and the corresponding sensor forecast stored in the system memory.
It is determined whether an alarm has been issued by comparing the respective alarm discrimination levels of fire alarms and linked alarms, and the discriminated alarm discrimination result data is sequentially stored in a temporary memory.

When monitoring by polling of all the sensors connected to each sensor line derived from the repeater is completed in this way, and the same monitoring operation is completed for other repeaters,
The signal processing circuit of each repeater transmits the alarm determination result data of each sensor stored in the temporary memory to the receiver side via the multiplex signal line, and the receiver side transmits these alarm determination result data. is received by the signal processing circuit and stored in the memory means, and performs necessary signal processing, and drives the alarm notification means to perform necessary alarm display and alarm notification. These series of operations are repeated.

On the other hand, when the mode switching means of the receiver switches to the test mode, a test start signal with a repeater address attached is sent from the signal processing circuit of the receiver via the multiplex transmission control unit to the repeater example sequentially by multiplexed signals. In the repeater example, this test start signal is received by the signal processing circuit, and a test signal with the line number, sensor address, and test standard data is processed from among the sensor information stored in the system memory. The sensor line is transmitted to the same sensor line signal processing circuit.

In the sensor line signal processing circuit, this test signal is sequentially transmitted to each sensor side as a multiplexed signal via a sensor line multiplex transmission control section using a polling method.

In response to this test signal, a reply signal containing digital data sent back from the sensor side is received and decoded by the sensor line signal processing circuit via the sensor line multiplex transmission control section, and the decoded reply signal is sent to the signal processing circuit. to be transmitted. The signal processing circuit determines whether the digital data attached to the reply signal matches the test reference data attached to the test signal, and stores the determined test discrimination result data in a temporary memory.

When the operation test of each sensor is completed in this way and the test discrimination result data is stored in the other repeaters by the same operation, the test discrimination of each sensor is stored in the temporary memory of each repeater. The result data is sequentially transmitted to the receiver side via the multiplex signal line, and the receiver receives the test discrimination result data in a signal processing circuit, stores it in a memory means, and performs necessary signal processing. , drives the alarm notification means to perform necessary alarm display and alarm notification. In the present invention as set forth in claim 2, when the mode switching means is switched to the monitoring mode, the sensor is activated again by the above-mentioned operation in the monitoring mode. is the same as In addition, regarding the operation in test mode, the operation from the signal processing circuit to transmitting the test signal to each sensor via the sensor line signal processing circuit is the same, but each sensor that receives the test signal When a reply signal is sent back to the signal processing circuit via the sensor line signal processing circuit, the signal processing circuit converts the test reference data attached to the test signal and the reply signal as in the case of claim 1. In addition to determining the match with the attached digital data,
It is determined whether the time required from outputting the test signal until the return signal is sent back is within a predetermined time period, and the test determination result data obtained by performing both of these determinations is stored in temporary memory. Memorize sequentially. Thereafter, the same operation as in claim 1 is performed.

In the present invention as set forth in claim 3, the mode switching means of the receiver normally switches to the monitoring mode.
Each sensor is monitored by the operations described in , and at predetermined intervals (for example, 15 days, 30 days, etc.)
The mode is automatically switched to the test mode, and the operation of each sensor is tested by the operation described in claim 1. In the present invention as set forth in claim 4, in which the mode is switched to the monitoring mode again after the operation test is performed, the signal processing circuit of the repeater normally switches to the monitoring mode, and each While monitoring the sensors, the test mode is automatically switched to the test mode at predetermined intervals, and the operation of each sensor is tested by the operation described in claim 1. In the analog sensor of the present invention as set forth in claim 5, wherein the monitor mode is set again after the operation test is performed, when a monitor signal with a sensor address is transmitted via the sensor line, This supervisory signal is received and decoded by a signal processing circuit via a multiplex transmission control section. On the other hand, the temperature detection means uses a heat-sensitive element to constantly output an analog detection signal corresponding to the ambient temperature to the A/D conversion circuit, and the A/D conversion circuit receives the analog detection signal and constantly outputs corresponding digital data. It is output to the signal processing circuit. When the signal processing circuit determines that the sensor address attached to the transmitted monitoring signal matches the sensor address set in the address setting section, the signal processing circuit outputs an output from the A/D conversion circuit. A reply signal in which the sensor address set by the address setting section is added to the digital data set by the address setting section is outputted to the multiplex signal line via the multiplex transmission control section. Further, when a test signal with a sensor address is transmitted via the sensor line, this test signal is received and decoded by the signal processing circuit via the multiplex transmission control section. When the signal processing circuit determines that the transmitted sensor address matches the sensor address set in the address setting section, the signal processing circuit uses the same digital signal as the test reference data attached to the test signal. A reply signal with the sensor address set by the address setting section added to the data is output to the multiplex signal line via the multiplex transmission control section.

[Example] The present invention will be described in detail below with reference to the drawings.

Fig. 1 shows the basic configuration of the fire alarm system of the present invention.・・・
and are connected by a multiplex signal line l. Also,
A plurality of sensor lines Ils... are led out from each repeater, and a plurality of analog sensors 3...2 are connected to these sensor lines IS. A terminating resistor R is connected to the terminal end of the sensor line As, and by passing a predetermined current through this terminating resistor R, the sensor line multiplex transmission control section of the repeater 2, which will be described later, can sense the This makes it possible to detect disconnection of the device line As.

Figure 2 shows a fire receiver l used in the system of the present invention.
11 is a multiplex transmission control unit connected to a multiplex signal line to transmit and receive data using multiplexed signals to and from the repeater 2; 12; is the line number of the connected sensor line, the sensor address, and the type of sensor (for example, , type of smoke detector or heat detector)
, a sensor information setting means for manually setting sensor information such as test standard data transmitted along with a test signal during an operation test and each discrimination level of prediction, fire alarm, and interlocking alarm; 14
is a memory means for storing at least the sensor information set by the sensor information setting means 12. 13 is a mode switching means having a mode switching switch 13a;
A monitoring mode for issuing an alarm after receiving alarm determination result data obtained by discriminating reply signals sent back from each sensor 3 on the side of the repeater 2, and a monitoring mode for issuing an alarm notification by receiving alarm determination result data obtained by discriminating reply signals sent back from each sensor 3 on the side of the repeater 2; In response to the test discrimination result data obtained by discriminating the return signal, a test mode for displaying the operating status of each sensor 3 and reporting an abnormality is switched and set. 15 is
In monitoring mode, alarm determination result data from each sensor is sent back via each repeater 2, and alarm display and alarm sound are performed, and in test mode, data is sent back via each repeater 2. This is an alarm notification means for receiving the test discrimination result data of each sensor 2 and displaying an abnormality in the operating state and sounding an alarm sound. In addition, lO is a signal processing circuit,
In addition to carrying out signal processing in each part, when the system is started up, the sensor information stored in the memory means 14 is sequentially transmitted to the repeater 2 side via the multiplex transmission control section 11 by a multiplexed signal with a repeater address attached. On the other hand, in the monitoring mode, a monitoring start signal with a repeater address attached is sequentially output to the repeater 2 side via the multiplex transmission control unit 11 as a multiplex signal, and in the test mode, the monitoring start signal is output to the repeater 2 side via the multiplex transmission control unit 11. An operation is performed in which test start signals with addresses are sequentially outputted to the repeater 2 side using multiplexed signals.

FIG. 3 is a block diagram showing the internal configuration of the repeater 2 used in the system of the present invention. In the figure, 21 transmits and receives data using multiplexed signals with the receiver 1. 22 is an address setting unit for setting a repeater address unique to the repeater. 27 is the sensor line I! This is a k-th sensor line multiplex transmission control unit that is provided in S'tl and sends and receives data using multiplexed signals to and from a plurality of sensors 3 connected to each sensor line IS. By passing a predetermined current through a terminating resistor R connected to the end of the line IS, the sensor port &l! It has a function to detect disconnection of S, and detects when the voltage level supplied to each sensor 3 side through the sensor line As becomes zero, and the sensor port gI! It has a function to detect short circuit of s. 24 indicates a sensor connected to the sensor line IS derived from the repeater 2 among the sensor information stored in the memory means 14 of one example of the receiver when the system is activated. 3. System memory for sequentially capturing and storing information corresponding to...
23 temporarily stores the alarm discrimination result data obtained by discriminating the reply signals sent back from each sensor in the monitoring mode, while in the test mode it stores the reply signals returned from each sensor. This is a temporary memory for temporarily storing test discrimination result data obtained by discrimination.

26 is a sensor port provided for each sensor direction &! It is a signal processing circuit, and in the monitoring mode, receives a monitoring signal for monitoring the alarm status of each sensor 3 connected to each sensor line A'S, and transmits the sensor line multiplex transmission control unit 2.
7 to sequentially output a monitoring signal in the form of a multiplexed signal to each sensor 3 by polling, and receive and decode the reply signal in the form of a multiplexed signal sent back from these sensors.In the test mode, each sensor line lS receives a test signal for performing an operation test of each sensor 3 connected to the sensor line, and sequentially outputs a test signal in the form of a multiplexed signal to each sensor 3 by polling via the sensor line multiplex transmission control section 27, The multiplexed return signals sent back from these sensors are received and decoded. The sensor line signal processing circuits 26 each have a transmission memory 26a for storing data during signal processing, and distribute the signal processing of multiplexed signal transmission to each sensor line IS, as will be described later. This reduces the burden on the signal processing circuit 20.

20 is a signal processing circuit that plays a central role in the operation of the repeater 2, and in the monitoring mode, it receives a monitoring start signal transmitted from the receiver side via the multiplex signal line 1 through the multiplex transmission control section 21, and stores the signal in the system memory. Among the sensor information stored in the sensor information, a monitoring signal with at least a line number and a sensor address attached is sent to the sensor 3 via the sensor line signal processing circuit 26.
Sequentially transmitted to the side. Then, it receives a reply signal containing digital data corresponding to the ambient temperature sent back from the sensor 3 side, and uses this digital data for each discrimination level of forecast, fire alarm, and linked alarm stored in the system memory 24. The alarm status is determined by comparing with . The determined alarm determination result data is stored in the temporary memory 23,
After the monitoring of each sensor 3 by polling has completed in this way, the alarm determination result data of each sensor 3 stored in the temporary memory 23 is transmitted through the multiplex transmission control unit 21 and the multiplex signal line l. The operation of transmitting to the receiver 1 side is repeated. In addition, in the test mode, a test start signal transmitted from the receiver 1 side through the multiplex transmission control unit 21 via the multiplex signal line l is received, and at least the line number of the sensor information stored in the system memory 24 is received. , the test signal with the sensor address and test reference data is sent to the sensor line signal processing circuit 26 and the sensor line multiplex transmission control unit 2.
7 to the sensor 3 side. Then, it receives a reply signal containing digital data sent back from the sensor 3 side, and performs normal operation if the test reference data attached to the test signal and the digital data of the reply signal match. The test discrimination result data is sequentially stored in the temporary memory 23. After the operation test of each sensor is completed in this way, the test discrimination result data of each sensor 3 stored in the temporary memory 23 is received via the multiplex signal line l through the multiplex transmission control unit 21 [1 Perform the action of transmitting to the side.

The switching connection circuit 25 is for switching signals transmitted between the signal processing circuit 20 and the sensor line signal processing circuit 26, and identifies the line number attached to the transmitted signal. The signal is switched and connected.

In addition, the forecast discrimination level is the discrimination level for predicting the occurrence of a fire when the temperature at the location where the sensor is installed rises a little when a fire occurs. A discrimination level to report the occurrence of a fire when the temperature of the sensor increases, and the interlocking alarm will link fire doors and smoke prevention shutters to prevent the spread of fire if the temperature at the location where the sensor is installed further rises. This is the discrimination level for

FIG. 4 is a block diagram showing the internal configuration of the analog sensor 3 used in the system of the present invention (corresponding to claim 5).
Sending data using multiplexed signals to and from the repeater 2 via the
32 is an address setting unit for setting a sensor address unique to the sensor; 35 is a multiplex transmission control unit for performing reception;
34 has a heat sensitive element (not shown) whose electric resistance value changes depending on the ambient temperature and outputs an analog detection signal according to the ambient temperature; 34 indicates an analog detection output from the temperature detection means 35; An A/D conversion circuit 33 that converts a signal into corresponding digital data is a memory section for storing at least data necessary for signal processing in a signal processing circuit to be described later.

Reference numeral 30 denotes a signal processing circuit, in which the sensor address attached to the monitoring signal transmitted from the repeater 2 side via the sensor line As is the same as the address set in the address setting section 32 in the monitoring mode. If the sensor address set by the address setting unit 32 is attached to the digital data output from the A/D conversion circuit 34 corresponding to at least the analog detection signal, the multiplex transmission control unit 31 sends a reply signal. Multiplexed signals through &! An operation is performed to send a reply to the repeater 2 side via l. In addition, in the test mode, if the sensor address attached to the test signal transmitted from the repeater 2 side via the sensor line As matches the address set by the address setting section 32, , a return signal in which at least the sensor address set by the address setting unit 32 is attached to the same digital data as the test reference data attached to the test signal is passed through the multiplex transmission control unit 31 and sent to the repeater via the multiplex signal line l. Perform an action to send a reply to the 2nd side.

The system operation of the present invention having such a configuration will be described below.

Before starting the system, for each sensor 2 connected to the sensor line As derived from the repeater 2, check the connected line number, sensor address, sensor type, and the test signal during the operation test. The sensor information setting means 12 of the receiver 1 manually sets the test standard data to be transmitted along with the sensor information, such as the alarm discrimination level of the forecast, fire alarm, and interlocking window. device information is sent to the signal processing circuit 10
is stored in the memory means 14 via the . When the system is started, the signal processing port N10 on the receiving II 2 side multiplexes multiplex signals in which each sensor information stored in the memory means 14 is appended with the repeater address of the repeater 2 to which the sensor 3 is connected. It is transmitted to each repeater 2 via the transmission control unit 11. On each repeater 2 side, sensor information having the same address as the repeater address set by the address setting section 22 is received via the multiplex transmission control section 21, and sequentially stored in the system memory 24, and all Once the sensor information is transferred to the system memory 24 of each repeater 2, the system is ready for operation.

First, the operation when the mode changeover switch 13a of the mode changeover means 13 of the receiver is operated to switch to the monitoring mode will be described.

■From the signal processing circuit 10 of the receiver 1 to the multiplex transmission control unit 11
A monitoring start signal with a repeater address attached thereto is sequentially outputted to the repeater 2 side as a multiplexed signal via a multiplexed signal line 1.

■On the repeater 2 side, this monitoring start signal is sent to the multiplex transmission control unit 2.
1, the signal processing circuit 20 receives and decodes the monitoring signal, and among the sensor information stored in the system memory 24, a monitoring signal with at least a line number and a sensor address is sent to the sensor line signal processing via the switching connection circuit 25. It is transmitted to the circuit 26 side.

The sensor line signal processing circuit 26 that received the O monitoring signal,
This monitoring signal is transmitted through the sensor line multiplex transmission control unit 27 to each sensor 3 side in a polling manner as a multiplexed signal via the sensing waist line H1S.

- In the sensor 3 that receives the monitoring signal, the signal processing circuit 30 determines whether the sensor address attached to the monitoring signal matches the address set by the address setting section 32, and when a match is determined, A The digital data corresponding to the ambient temperature output from the /D conversion circuit 34 is sent to the signal processing circuit 3.
0, the address setting section 32 generates a reply signal with the set sensor address attached, and outputs it to the sensor line As through the multiplex transmission control section 31.

■On the repeater 2 side, the reply signal transmitted via the sensor line IS is received and decoded by the sensor line signal processing circuit #126 through the sensor line multiplex transmission control unit 27, and the received and decoded reply signal is switched and connected. Signal processing circuit 20 via circuit 25
to be transmitted.

■The signal processing circuit 20 compares the digital data of the transmitted reply signal with the alarm discrimination levels of the corresponding sensor forecast, fire alarm, and interlocking window stored in the system memory 24, and issues an alarm. is determined, and the determined alarm determination result data is sequentially stored in the temporary memory 23.

■When the monitoring by polling of all the sensors 3 connected to each sensor line As derived from the repeater 2 in this way is completed, and the similar monitoring operation is completed for the other repeaters 2, the signal processing The circuit 20 attaches the repeater address set by the address setting unit 22 to the alarm determination result data of each sensor 3 stored in the temporary memory 23 of each repeater 2, and sends the data to the multiplex signal line through the multiplex transmission control unit 21. is transmitted via multiplexed signals to one example receiver.

- On the receiver 1 side, the signal processing circuit 10 receives these alarm determination result data, stores it in the memory means 14, performs necessary signal processing, and drives the alarm notification means 15 to display necessary alarms and alarms. Make announcements. These series of operations are repeated.

Next, the operation when the mode changeover switch 13a of the mode changeover means 13 of the receiver is operated to switch to the test mode will be described.

■From the signal processing circuit 1o of the receiver l to the multiplex transmission control unit 11
A test start signal with a repeater address attached thereto is sequentially output to the repeater 2 side as a multiplexed signal.

■In the repeater example, the test start signal transmitted via the multiplex signal line l is received and decoded by the signal processing circuit through the multiplex transmission control unit 21, and at least the line Connection circuit 25 for switching test signals with number, sensor address and test standard data
The signal is transmitted to the sensor line signal processing circuit 26 side via.

■The sensor line signal processing circuit 26 that has received the test signal transmits the test signal to each sensor side by a polling method as a multiplexed signal through the sensor line multiplex transmission control unit 27 via the sensor line As. .

- Upon receiving the test signal, the sensor 3 determines whether the sensor address attached to the test signal matches the address set by the address setting unit 32 using the signal processing circuit 3o, and when a match is determined, The signal processing circuit 30 generates a reply signal in which the sensor address set by the address setting section 32 is attached to the same digital data as the test reference data attached to the test signal, and transmits the reply signal to the sensor line through the multiplex transmission control section 31. Z
Output to S.

■On the repeater 2 side, the reply signal transmitted between the sensors & via the IAS is received and decoded by the sensor line signal processing circuit 26 via the sensor line multiplex transmission control unit 27, and the received and decoded reply signal is switched to the connection circuit. 25 through signal processing circuit 820
to be transmitted.

■The signal processing circuit 20 determines whether the digital data of the transmitted reply signal matches the test reference data of the corresponding sensor stored in the system memory 24, and stores the determined test discrimination result data in the temporary memory 23. Memorize sequentially.

■By this time, the operation test by polling of all the sensors 3 connected to each sensor line IS derived from the repeater 2 is completed, and when the similar operation test is completed for the other repeaters 2, the signal The processing circuit 20 attaches the repeater address set by the address setting section 22 to the test discrimination result data of each sensor 3 stored in the temporary memory 23 of each repeater 2, and sends the multiplexed signal through the multiplex transmission control section 21. The multiplexed signal is transmitted to the receiver 1 via the line 1.

- On the receiving side 1l11, the signal processing circuit 10 receives these test discrimination result data, stores it in the memory means 14, performs necessary signal processing, and drives the alarm annunciation means 15 to perform necessary alarm display and alarm notification. conduct. Then, when the mode changeover switch 13a of the mode changeover means 13 is operated to switch to the monitoring mode, the alarm from the sensor is monitored again by the above-mentioned operation of the monitoring mode.

In the above-described operation in the test mode, the signal processing circuit 20 of the repeater 2 converts the test reference signal attached to the test signal output to the sensor 3 side and the digital signal attached to the reply signal sent back from the sensor 311. The operating state of the sensor 3 is determined by determining which data matches. By determining whether a reply signal is sent back from the sensor 3 side,
The reliability of the operation test can be further improved (corresponding to claim 2).

The system operation when the time required from transmitting a test signal to receiving a reply signal is defined in the signal processing circuit 20 of the repeater 2 will be described below, but it is the same in the monitoring mode. Omitted.

Mode changeover switch 13 of mode changeover means 13 of receiver
When a is operated and the test mode is set.

■Operation steps in the above test mode The same operations as from ■ to ■ are performed.

■The signal processing port #J20 determines whether the digital data of the transmitted reply signal matches the test reference data of the sensor corresponding to z1 stored in the system memory 24, and outputs a test signal. It is determined whether the time required until a reply signal is sent back is within a predetermined time, and test determination result data obtained by performing both of these determinations is sequentially stored in a temporary memory.

(2) Operation process in the test mode The same operations as (2) and (2) are performed.

In this embodiment, the period from the time when the signal processing circuit 20 of the repeater 2 sequentially transmits the test signal to each sensor 3 side by polling until the reply signal is returned from the sensor 3 side at the time of the next polling. The time is specified as 3.5 seconds.

This is from the time when the alarm from the sensor 3 is detected to the receiver 1.
The certification standard stipulates that the time required for the side to issue an alarm is within 5 seconds, and in this system, one polling including the sensors 3 connected to other repeaters 2 takes approximately 5 seconds. 3
It takes about 1 second to transmit the test discrimination result data from each repeater 2... to the receiver 1 side and perform the necessary display, so the sensor side This value was determined because the receiver l side can issue an alarm within 4.5 seconds if the test discrimination result data of is obtained.

Next, a fire alarm system according to the present invention as set forth in claim 3 will be explained, but the configuration in this case is the same as the configuration of the present invention as set forth in claim 1 above.

In the above embodiment, the mode switching means 13 of the receiver l was configured to include the mode switching switch 13a and to manually switch the mode. The configuration is such that the test mode is automatically switched to the test mode every predetermined period. Therefore,
For example, if you set the predetermined period to 30 days, the system will automatically switch to test mode and test the operation of each sensor once every 30 days, making it possible to discover sensor failures early. be.

In this way, the configuration that automatically switches to test mode is
It is also possible to perform this not only on the receiver 1 side but also on each repeater 2 side (corresponding to claim 4).

In other words, the mode switching means on the receiver l side can be omitted, and instead, the signal processing circuit 20 on each repeater 2 side can automatically switch to the test mode every predetermined period. . In this way, receiver 1
The burden of example signal processing can be reduced and reliability can be improved.

[Effects of the Invention] According to the present invention as set forth in claim 1, an operation test of a connected analog sensor can be efficiently performed in a short time by simply performing a mode switching operation and switching to the test mode. , sensor failure can be detected early,
A fire alarm system with improved reliability can be provided.

According to the present invention as set forth in claim 2, in addition to the effects set forth in claim 1, since the time from transmitting the test signal to each sensor to receiving the reply signal is defined, the operation test can be performed easily. A fire alarm system with further improved reliability can be provided.

According to the present invention described in claim 3.4, the above-mentioned claim 1
In addition to the effects described in , since an operation test is automatically performed every predetermined period of time, it can contribute to detecting sensor failures within half a second, providing a fire alarm system with improved reliability. can.

According to the analog sensor of the present invention described in claim 5,
By using the system described in claims 1 and 2 above, operation tests with improved reliability can be efficiently performed.

[Brief explanation of drawings]

Fig. 1 is a system configuration diagram of the present invention, Fig. 2 is a block diagram showing the internal structure of the fire receiver, Fig. 3 is a block diagram showing the internal structure of the repeater, and Fig. 4 is a claim. 3 is a block diagram showing the internal configuration of the analog sensor described in FIG. [Description of symbols] 1...Fire receiver 10...Signal processing circuit 11...Multiple transmission control section 12...Sensor information setting means 13...Mode switching means 13a...Mode selection switch I! , S ◆...Memory means...Alarm notification means/Repeater...Signal processing circuit...Multiple transmission control section...Address setting section...Temporary memory...System memory...Sensor line signal processing circuit...Sensing equipment line multiplex transmission control section, analog sensor, signal processing circuit, multiplex transmission control section, address setting section, memory section, A/D conversion circuit, temperature detection means, multiplex signal line, sensor line

Claims (4)

[Claims] (1) Detection in which a fire receiver and multiple repeaters with repeater addresses are connected with multiple signal lines, and from these repeaters, multiple analog sensors to which at least sensor addresses are assigned are connected. Deriving the device line,
In the monitoring mode, the repeater side receives the reply signals transmitted from these analog sensors via the sensor line and makes alarm determination, and then transmits the alarm discrimination result from the repeater to the receiver side. A fire alarm system that has an operation test function that notifies alarms by relaying data, but also tests the operation of each sensor connected to each repeater in sequence according to commands from the receiver side in test mode. The fire alarm system includes a multiplex transmission control unit for transmitting and receiving data using multiplexed signals to and from the repeater, and a detector line connected to the repeater. For each sensor, the connected line number, sensor address, sensor type, test standard data to be transmitted along with the test signal during operation test, and each discrimination level of forecast, fire alarm, linked alarm, etc. a sensor information setting means for setting and inputting device information; a memory means for storing at least the sensor information set by the sensor information setting means; and a reply sent back from each sensor on the repeater side. A monitoring mode for issuing alarm notifications by receiving alarm determination result data obtained by discriminating signals, and a test determination result data obtained by discriminating reply signals returned from each sensor in the repeater example above. a mode switching means having a mode changeover switch for switching between a test mode in which the operating status of each sensor is displayed and an abnormality notification is performed based on the received signals; In response to the device's alarm determination result data, alarm display and alarm sound are performed, while in the above test mode,
An alarm notification means for displaying an abnormality and sounding an alarm upon receiving the test discrimination result data of each sensor sent back via each repeater mentioned above; The sensor information stored in the memory means is sequentially transmitted to the repeater side via the multiplex transmission control unit by multiplexed signals attached with repeater addresses, while in the monitoring mode, the sensor information is transmitted via the multiplex transmission control unit to the repeater side. A monitoring start signal with a repeater address attached is sequentially outputted to the repeater side using a multiplexed signal, and in the test mode, a test start signal attached with a repeater address is sequentially outputted via a multiplexed signal via the multiplex transmission control section. The repeater includes a multiplex transmission control unit for transmitting and receiving data using multiplexed signals to and from the receiver, and a relay specific to the repeater. An address setting section for setting the device address, and a sensing section provided for each sensor line to send and receive data using multiplexed signals between the multiple sensors connected to each sensor line. a device line multiplex transmission control unit, and when the system is activated, information corresponding to the sensor connected to the derived sensor line, from among the sensor information stored in the memory means on the receiver side. A system memory for sequentially capturing and storing data, and a system memory for temporarily storing alarm determination result data obtained by discriminating reply signals sent back from each sensor during the monitoring mode, while in the testing mode, Temporary memory for temporarily storing test discrimination result data obtained by discriminating response signals sent back from each sensor; Upon receiving a monitoring signal for monitoring the alarm status of each sensor connected to the sensor line, a monitoring signal in the form of a multiplexed signal is sequentially output to each sensor by polling via the sensor line multiplex transmission control section. At the same time, it receives and deciphers reply signals from multiplexed signals sent back from these sensors, while in the test mode, it receives test signals to test the operation of each sensor connected to each sensor line. , a sensor line signal that sequentially outputs test signals in the form of multiplex signals to each sensor by polling via the sensor line multiplex transmission control unit, and receives and decodes reply signals in the form of the multiplex signals sent back from these sensors. A processing circuit, in the monitoring mode, receives a monitoring start signal transmitted from the receiver side via the multiplex transmission control unit, and detects at least the line number and the sensor information stored in the system memory. A monitoring signal with a device address attached thereto is sequentially transmitted to the sensor side via the sensor line signal processing circuit, and a return signal containing digital data corresponding to the ambient temperature is received from the sensor side. The alarm status is determined by comparing this digital data with each discrimination level of forecast, fire alarm, and linked alarm stored in the system memory, and the determined alarm discrimination result data is stored in the temporary memory, After monitoring each sensor by polling in this way, an operation is performed to transmit the alarm determination result data of each sensor stored in the temporary memory to the receiver side via the multiplex signal line. While repeating the test, in the test mode, a test start signal transmitted from the receiver side via the multiplex transmission control unit is received, and among the sensor information stored in the system memory,
A test signal with test reference data corresponding to at least a line number, a sensor address, and an analog value is sequentially transmitted to the sensor side via the sensor line signal processing circuit, and the digital data returned from the sensor side is processed. receiving the included reply signal, determining whether the test reference data attached to the test signal matches the digital data of the reply signal, sequentially storing the determined test discrimination result data in the temporary memory; and a signal processing circuit that transmits test discrimination result data of each sensor stored in the temporary memory to the receiver side via the multiplex signal line after the operation test of each sensor is completed. A fire alarm system with an operation test function. (2) The repeater, in the signal processing circuit, determines whether the test reference data attached to the test signal matches the digital data of the reply signal, and at the same time outputs the test signal from the signal processing circuit. Claim characterized in that it is configured to determine whether the time required to receive a reply signal from the sensor via the sensor line signal processing circuit is within a predetermined time. A fire alarm system having the operation test function described in Item 1. (3) The operation test function according to claim 1, characterized in that the mode switching means of the fire receiver is configured to automatically switch to a test mode every predetermined period. fire alarm system. (4) The mode switching means on the fire receiver side is removed, and instead, the signal processing circuit of the repeater automatically switches to the test mode at predetermined intervals. A fire alarm system having an operation test function according to claim 1. (5) A multiplex transmission control unit for transmitting and receiving data using multiplexed signals to and from the repeater via the sensor line, an address setting unit for setting a sensor-specific address, and an ambient temperature temperature detection means that has a heat-sensitive element whose electrical resistance value changes depending on the ambient temperature and outputs an analog detection signal according to the ambient temperature; and converts the analog detection signal output from the temperature detection means into corresponding digital data. An A/D conversion circuit, a memory section for storing at least data necessary for signal processing, and a sensor address attached to a monitoring signal transmitted from the repeater side via a sensor line, according to the above address setting. If the address matches the address set in the address setting section, the sensor address set in the address setting section is attached to at least the digital data output from the A/D conversion circuit in response to the analog detection signal. The response signal sent to the repeater is sent back to the repeater side via the multiplex transmission control section, while the sensor address attached to the test signal transmitted from the repeater side via the sensor line is set in the address setting section. If the address matches the specified address, the multiplex transmission control transmits a reply signal in which the same digital data as the test reference data attached to the test signal is appended with at least the sensor address set in the address setting section. An analog sensor characterized by comprising a signal processing circuit that sends a signal back to the repeater side via the section.