JP5826088B2 - Fire alarm system - Google Patents

Description

  The present invention relates to a fire alarm system provided with a fire receiver and a fire detector.

Conventionally, in a fire alarm facility equipped with an on-off type fire detector known as a P type fire detector connected to a P type fire receiver, a terminating resistor or terminator is connected to the end of the sensor line. The receiver detects a specific disconnection monitoring current or disconnection monitoring voltage that flows in the sensor line depending on the terminating resistance or the impedance of the terminator, and determines whether the sensor line is normal or disconnected (patent) Reference 1).
In such a conventional P-type fire receiver, the disconnection state of the line is monitored by providing a termination resistor or a terminator.

JP 09-062957 A

  In the conventional P-type fire receiver, when the number of connected detectors is increased, the total sum of the internal resistances increases, and it is necessary to decrease the resistance value of the corresponding termination resistor and increase the current flowing through the termination resistor. . However, since the space in which the fire receiver can be installed is limited, there is a problem in that the capacity of the power supply and the power transformer provided are limited, and as a result, the number of sensors that can be connected is limited.

  The present invention eliminates the termination resistor connected to the end of the sensor line of the P-type fire receiver and determines that the sensor line connected by one fixed address information is disconnected, thereby limiting the power capacity. Even in such a case, the number of fire detectors that can be connected can be increased, and the disconnection can be reliably monitored even if the number of connected detectors increases.

The present invention relates to a plurality of sensor lines, a P-type fire receiver connected to the plurality of sensor lines and detecting fire and disconnection in units of each sensor line, and fire reception via each sensor line. In a fire alarm facility comprising a plurality of fire detectors connected to a machine and outputting a fire signal by switching operation, the fire receiver has a plurality of transmission / reception means for transmitting signals for each detector line, A status confirmation signal is transmitted to each fire sensor for each sensor line via the transmission / reception means, and a status response signal transmitted from each fire sensor is received in response to the status confirmation signal. If the state response signal cannot be received from the state response signal collecting means for collecting the state response signal of each fire detector and the fire detector connected to the end of each detector line, the sensor line is disconnected. Disconnection detection hand to determine that The state response signal collecting means simultaneously transmits a state confirmation command to each transmission / reception means, and each transmission / reception means that has received the state confirmation instruction is connected to a sensor. It is characterized in that a status confirmation signal is transmitted in order for each line.

Further, according to the present invention, each fire detector is given an address up to a predetermined number for each detector line, and each fire detector for each detector line is assigned up to a predetermined number. The address is assigned individually, and the status confirmation signal and status response signal are transmitted in association with the address, and the same address is assigned to the fire detector connected to the end of each sensor line. When the fire receiver is activated, it transmits a status confirmation signal associated with the address, determines reception of a status response signal from the fire sensor connected to the end of each sensor line, and detects the end of the sensor line. The subsequent disconnection monitoring process by the status response signal collecting means and the disconnection detecting means is performed only on the sensor line that has received the status response signal from the fire detector connected to the sensor. .

  Further, the present invention is characterized in that the same address is a final address.

  According to the present invention, when a status response signal from each fire sensor is received for each sensor line and a response signal from a fire sensor connected to the end of each sensor line cannot be received, the sensor Since it is determined that the line is disconnected, it is not necessary to connect a resistor to the end of each sensor line. As a result, the number of connected detector lines and the number of fire detectors that can be connected to the detector line can be increased according to the power capacity, and even if the number of connected fire detectors increases. Therefore, it is possible to reliably monitor disconnection.

  Further, according to the present invention, since the same address is assigned to the fire detector connected to the end of each sensor line, the process for determining the disconnection of the sensor line can be made common.

  Further, according to the present invention, the fire detector connected to the end of each detector line is given the final address of the fire detector that can be connected to the detector line. Even if a fire detector is added between the detectors, it is not necessary to change the final address, so the fire detector can be easily added.

The lineblock diagram of the fire alarm equipment which showed the embodiment of the present invention. The block diagram of the fire detector which showed embodiment of this invention.

Hereinafter, the fire alarm system 100 of the present invention will be described with reference to FIGS.
[Fire alarm equipment]
Reference numeral 100 denotes a fire alarm system 100 including a plurality of sensor lines L 1, a P-type fire receiver 1, and a fire sensor 2.
Reference numeral 1 denotes a P-type fire receiver 1, which is connected to a plurality of sensor lines L1, and detects a fire in each line unit and detects a break in a predetermined cycle. The P-type fire receiver 1 is connected to a plurality of fire detectors 2 that output a fire signal by a switching operation via a plurality of sensor lines L1 including a pair of signal lines. The P-type fire receiver 1 is provided with a plurality of transmission / reception circuits 3 as transmission / reception means for performing signal transmission for each sensor line L1. Each sensor line L1 is individually connected to the receiver communication unit 8 of each transmission / reception circuit 3, and is laid toward each protection area in the building. Note that the number of connections between the sensor line L1 and the fire detector 2 is determined in advance by the capacity of the power transformer and the built-in power supply provided in the P-type fire receiver 1, but for example, the sensor line L1 has one transmission / reception. Twenty lines are connected to the circuit 3, and up to 60 fire detectors 2 are connected to each sensor line L1.

[Fire detector]
The fire sensor 2 includes a detection unit 10 that detects a fire, a sensor storage unit 12 that stores various information, a sensor communication unit 11 to which a sensor line L1 is connected, and a sensor that controls the entire sensor. And a control unit 13.

  The detection unit 10 includes, for example, a thermistor that detects the temperature around the sensor, and a smoke detection unit that detects light scattered by smoke using a light projecting unit and a light receiving unit.

  The sensor communication unit 11 is an example of a communication unit that performs signal transmission with the P-type fire receiver 1, and is connected to the transmission / reception circuit 3 (receiver communication unit 8) of the P-type fire receiver 1 via the sensor line L1. Is done. Further, the sensor communication unit 11 has an internal contact (not shown), and the internal contact is turned on and off by the sensor control unit 13 to change the voltage between the sensor lines L1 and transmit and communicate with the fire receiver 1. Is.

The sensor storage unit 12 stores type information of the fire detector 2, manufacturing information stored at the time of factory shipment, address information set by an address setting device at the time of installation, and the like. Here, the manufacturing information referred mainly or information related to the sensitivity of the fire detector 2, and manufacturing date of the fire detector has been produced, such as is stored ID code associated with the information of the production line Yes.
Here, the address setting method of the fire detector will be described in detail. Each fire sensor 2 is given an address up to a predetermined number for each sensor line, and each fire sensor 2 for each sensor line is individually assigned an address up to a predetermined number. ing. Note that the same address is assigned to the fire detector connected to the end of each sensor line.

FIG. 1 shows a first group G1 to a sixth group G6 in which the sensor group connected to each sensor line L1 is one group.
The first group G1 and the fourth group G4 show an example in which the maximum number, for example, 60 fire detectors 2 are connected to the sensor line L1. Therefore, the address information set to each fire detector 2 is set to the fire detector 2 closest to the P-type fire receiver 1 as the first, and a serial number is set from there to the end fire detector 2. The fire detector 2 is set with the maximum address No. 60.

  The second group G2 and the fifth group G5 show examples in which only two fire detectors 2 are connected to the sensor line L1. In this case, the address information set in the fire detector 2 is set to the smallest address information No. 1 in the fire detector 2 close to the P-type fire receiver 1. In the second unit, No. 60, which is the maximum address of the number of fire detectors 2 connectable to the detector line L1, is set.

  The third group G3 and the sixth group G6 show examples in which only one fire sensor 2 is connected to the sensor line L1. In this case, the address information set in the fire detector 2 is set to No. 60 which is the maximum address of the number of fire detectors 2 that can be connected to the detector line L1.

  Although the transmitter / receiver circuit 3 shown in FIG. 1 is described in a simplified manner for the sake of explanation, usually about twenty receiver communication units 8 are provided for one determination unit, and two sensor lines L1 are provided. It can handle 10 lines.

  The sensor control unit 13 controls the entire sensor. For example, the sensor control unit 13 controls the internal contact of the sensor communication unit 11, and sends the state response signal and manufacturing information stored in the sensor storage unit 12 to the sensor communication unit 11. To the transmission / reception circuit 3. More specifically, when the detection unit 10 detects a fire, a so-called switching operation that turns on the internal contact for a predetermined time causes a short circuit between the sensor lines L1 to reduce the voltage between the sensor lines L1 and generate a fire signal. Output.

  In addition, when the sensor communication unit 11 receives a later-described state confirmation signal transmitted from the receiver communication unit 8 of the transmission / reception circuit 3, the sensor communication unit 11 corresponds to its own address information stored in the sensor storage unit 12. A state response signal is transmitted at the timing of. More specifically, the P-type fire receiver 1 is connected to the fire detectors 2 up to the maximum address (No. 60) for each sensor line L1 via each transmission / reception circuit 3 regardless of the number of connected fire detectors. In response to this, a status confirmation signal is transmitted. At this time, the status confirmation signal is transmitted as a transmission pulse signal by associating 15 addresses of the fire detector 2 to be confirmed.

  The status confirmation signal is transmitted in four times for a maximum of 60 addresses. Specifically, a status confirmation signal corresponding to addresses 1 to 15, a status confirmation signal corresponding to addresses 16 to 30, a status confirmation signal corresponding to addresses 31 to 45, and addresses 46 to 60 A state confirmation signal corresponding to each is transmitted.

When the sensor communication unit 11 receives the status confirmation signal, the sensor control unit 13 responds to the status confirmation signal as a transmission pulse signal at a predetermined response timing (a predetermined slot) associated with its own address. The state response signal is transmitted to the transmission / reception circuit 3.
When the sensor communication unit 11 receives a manufacturing information collection signal (described later) transmitted from the transmission / reception circuit 3, a transmission pulse signal indicating its own manufacturing date information stored in the sensor storage unit 12 is transmitted to the sensor. The data is transmitted from the communication unit 11 to the receiver communication unit 8.

[Fire receiver]
The P-type fire receiver 1 has a transmission / reception circuit 3 connected to the fire detector 2 via the sensor line L1, a receiver control unit 4 for controlling the operation of the entire receiver, and a fire alarm or fire has occurred. The display unit 5 displays district state information and the like, an operation unit 6 that performs various operations, and a receiver storage unit 7 that stores connection information of the sensor line L1 connected to the transmission / reception circuit 3.

  The receiver control unit 4 is an example of a state response signal collecting unit that collects a state response signal of each fire detector. The receiver control unit 4 controls the entire fire receiver 2. When receiving a fire signal from the transmission / reception circuit 3, It controls lighting of a display unit 5 and the like which will be described later, or activates a smoke prevention device not shown. Further, the receiver control unit 4 outputs a state confirmation command for confirming disconnection monitoring to the transmission / reception circuit 3 at an operation of the operation unit 6 or at a predetermined cycle. The receiver control unit 4 transmits a manufacturing information collection command for collecting manufacturing date information of each sensor to the transmission / reception circuit 3 by operating the operation unit 6.

  The display unit 5 includes a light source such as an LED provided on the panel surface of the P-type fire receiver 1 and is provided corresponding to the sensor line L1 laid in each protection area. When the fire detector 2 connected to the sensor line L1 detects a fire and closes the internal contact (performs a switching operation), the corresponding LED and the like are controlled to be turned on by the receiver control unit 4. Is.

  The operation unit 6 is provided on the panel surface of the P-type fire receiver 1 and includes various operation switches for performing a maintenance check such as stopping a fire alarm due to a fire detection, monitoring disconnection, and collecting manufacturing date information. The operation unit 6 causes the receiver control unit 4 to output various signals by operating various switches by an inspection operator.

The receiver storage unit 7 stores connection information between the transmission / reception circuit 3 and the sensor line L1 installed in each protection area. The receiver storage unit 7 can rewrite the connection information of the detector line L1 by acquiring the database setting tool (not shown) and the address information of the fire detector 2 connected when the fire receiver 1 is turned on. It has become a thing.
The transmission / reception circuit 3 receives a receiver communication unit 8 connected to the sensor communication unit 11 of the fire detector 2 via the sensor line L1 and various signals from the fire sensor 2 received by the receiver communication unit 8. A discrimination unit 9 for discrimination is provided.

  In the transmission / reception circuit 3, three receiver communication units 8 are provided for one determination unit 9 for determining various states, and a pair of detector lines L1 are connected to each receiver communication unit 11, and One or a plurality of sensor groups G1 to G6 are provided in the device line L1.

  The receiver communication unit 8 detects a fire signal due to the switching operation of the fire detector 2 and transmits / receives various signals including pulse signals to the sensor communication unit 11.

  The determination unit 9 is an example of disconnection detection means, and determines various signals received by the receiver communication unit 8 through fire determination processing and signal determination processing, or various signals from the receiver communication unit 8 to the sensor communication unit 11. To send.

  More specifically, the fire discrimination process is an operation for discriminating a fire based on a voltage change between the sensor lines L1 monitored by the receiver communication unit 8, and the detector line L1 is detected by the switching operation of the fire detector 2. When the voltage between them decreases for a predetermined time, the determination unit 9 performs a fire determination process to determine a fire and outputs a fire signal to the receiver control unit 4.

  In addition, the signal determination processing includes, for example, an operation of determining disconnection of the sensor line L1 by transmitting and receiving a transmission pulse signal to and from the fire sensor 2 connected to the sensor line L1. More specifically, either a state confirmation command output from the receiver control unit 4 at a predetermined cycle or a state confirmation command output from the receiver control unit 4 when the inspection operator operates the operation unit 6. Is received by the determination unit 9, the determination unit 9 causes the receiver communication unit 8 to transmit a state confirmation signal to each sensor line L1. At this time, the receiver communication unit 8 confirms the state in which the address information of the fire detector 2 whose state is desired to be confirmed is given to each sensor line L1 in units of fifteen, regardless of the number of connected fire detectors. The signal is transmitted as a transmission pulse signal in four times corresponding to the maximum address. Then, when the receiver communication unit 8 receives the state response signal to which the address information is given from the sensor communication unit 11, the determination unit 9 performs a state response from the fire detector 2 to which the maximum address is set by signal determination processing. Determine the presence or absence of a signal. Specifically, each fire detector 2 transmits a status response signal at a predetermined response timing (predetermined slot) associated with its own address, so that the determination unit 9 has a predetermined response associated with the maximum address. It is determined whether or not a state response signal is received at a response timing (predetermined slot). By this signal discrimination processing, when the status response signal from the fire sensor 2 connected to the end of each sensor line and having the maximum address set cannot be received, the discrimination unit 9 determines that the sensor line is disconnected. The disconnection information associated with the receiver control unit 4 is output.

[Installation procedure]
Subsequently, a description will be given regarding the installation of the fire alarm system 100 in the present embodiment.
The P-type fire receiver 1 is shipped with a corresponding number of lines set in advance according to the scale of the property to be installed. Thereafter, it is installed by the installer together with the fire detector 2 and a controlled device (not shown). At this time, in addition to the manufacturing date information stored at the time of factory shipment, individual address information is set in the sensor storage unit 12 of the fire detector 2 by the address setting device. This address information is based on the one closest to the P-type fire receiver 1 and is normally set in order from 1 and, for example, a maximum of 60 units are connected depending on the capacity of the power transformer or internal power supply of the fire receiver 2. The However, depending on the size of the protection area where the sensor line L1 is laid, it may not be necessary to connect 60 units, but even in that case, the terminal 60 connected to the terminal is the maximum address. Address is set.

After the fire detector 2 is installed in the protection area, when the power source is connected to the P-type fire receiver 1 and activated, the determination unit 9 transmits a state confirmation signal associated with the address information from the receiver communication unit 8. . From fire sensors 2 connected to the respective sensor lines L1, when the sensor state response signal address is associated in is transmitted, the determination unit 9 determines the presence or absence of the reception of the maximum address by the signal determination processing . When it is determined that the maximum address has been received by the signal determination process, the determination unit 9 determines that the fire detector 2 has been normally installed, and transmits connection information of the groups G1 to G6 to the control unit 4. The receiver control unit 4 that has received the connection information from the determination unit 9 stores the connection information of the groups G1 to G6 in the receiver storage unit 7. Thereafter , since information collection is performed only for each of the groups G1 to G6 with status information, disconnection monitoring processing and manufacturing date information acquisition processing are simplified.
Thereafter, the fire alarm system 100 shifts to a fire monitoring state.

[Fire detection]
Then, the fire detection operation | movement of the fire alarm equipment 100 in this embodiment is demonstrated.
When the fire alarm system 100 is in a fire monitoring state, if a fire occurs in the protection area, the fire detector 2 detection unit 10 detects the fire, and the sensor control unit 13 switches the sensor communication unit 11 to perform the detection. The line L1 is substantially short-circuited. When the receiver communication unit 9 detects a voltage drop across the sensor line L1, the discrimination unit 9 detects the voltage value and discriminates whether or not there is a fire through a fire discrimination process. When the voltage value detected for a predetermined time is lower than the predetermined voltage value, the determination unit 9 determines that a fire has occurred and outputs a fire signal to the receiver control unit 4. Receiving the fire signal, the receiver control unit 4 blinks and displays the LED of the corresponding display unit 5 and transmits an activation signal to a controlled device (not shown).

[Disconnection monitoring]
Then, the disconnection monitoring of the fire alarm facility 100 in this embodiment will be described.
After the fire alarm system 100 is installed, the receiver control unit 4 transmits a state confirmation command to the transmission / reception circuit 3 at a predetermined cycle, and the transmission / reception circuit 3 that has received the state confirmation command is transmitted to the receiver communication unit by the determination unit 9. 8 transmits a state confirmation signal as a transmission pulse signal. When the sensor communication unit 11 receives the status confirmation signal, the sensor control unit 13 of each fire sensor 2 sends its own status response signal corresponding to the address information stored in its own sensor storage unit 12. The transmitted transmission pulse signal is transmitted to the transmission / reception circuit 3. At this time, if no disconnection occurs in the sensor line L1, the receiver communication unit 11 receives the maximum address, and when the receiver communication unit 11 receives the maximum address, the determination unit 9 performs sensor detection by disconnection determination processing. It is determined that the line L1 is normal, and the fire monitoring state is continued.

  On the other hand, for example, when a disconnection occurs in the first group of sensor lines L1, the maximum address cannot be sent from the terminal fire sensor 2 connected to the sensor line L1 where the disconnection has occurred. If the receiver communication unit 11 does not receive the maximum address, the determination unit 9 determines that a disconnection has occurred in the first group G1 by the disconnection determination process, and the receiver control unit 4 detects the disconnection associated with the sensor line number. Send a signal. The receiver control unit 4 that has received the disconnection signal associated with the sensor line number from the discriminating unit 9 displays the fact that the disconnection has occurred on the display unit 5, and therefore associates it with the sensor line number on the display unit 5. The blinking LED is controlled.

[Production date information acquisition]
Next, description will be made regarding the operation for obtaining the manufacturing date information in the fire alarm system 100 according to the present embodiment.
When a defect is found in the parts used in the fire detector 2 installed in the protection area, the inspection operator operates the operation unit 6 of the fire receiver 1 to obtain the manufacturing date information of each detector. get.
When the inspection operator operates the operation unit 6 of the fire receiver 1, a manufacturing information collection command is output from the receiver control unit 4 to the determination unit 9. The determination unit 9 that has received the manufacturing information collection command transmits a manufacturing information collection signal from the receiver communication unit 8 to each fire detector 2.

  At this time, the fire alarm system 100 according to the present invention collects manufacturing date information about the plurality of sensor lines L1 connected to the transmission / reception circuit 3 at different timings for each sensor line L1. That is, when a plurality of sensor lines L1 are connected in the same transmission / reception circuit 3, each sensor line L1 is set as one group. Then, the production date information of each fire detector 2 is collected in a group unit. At this time, the information is received in order so that the timing of each group does not overlap, so the production date information is surely and efficiently. Can be collected.

  When a plurality of transmission / reception circuits 3 are provided in the fire alarm facility 100, each determination unit 9 provided in each transmission / reception circuit 3 can be independently controlled. Therefore, the receiver control unit 4 transmits a manufacturing information collection command to each determination unit 9 at the same time.

  Then, each determination unit 9 that has received the manufacturing information collection command makes a plurality of sensor lines L1 connected to each receiver communication unit 9 as one group, and collects manufacturing date information in order in this group unit. To do. At this time, the manufacturing date information of the first group of different transmission / reception circuits 3, for example, the first group G1 and the fourth group G4 can be acquired simultaneously, so that the manufacturing date information can be collected more efficiently.

  As described above, the fire alarm system of the present invention can collect the production date information of the fire detector 2 connected to the sensor line L1 in a unit of the sensor line L1, so that the production date can be efficiently collected. Information can be collected.

The effects of the manufacturing information collecting method described above are not limited to the manufacturing information collecting process, and the same effects can be obtained even when applied to the disconnection determination process.

  In the embodiment of the present invention, the receiver control unit 13 as the state response signal collection unit and the determination unit 9 as the disconnection detection unit are described separately. However, the receiver control unit 13 serves as the disconnection detection unit. It may be provided with a function.

  Further, in the present application, when the response signal of the address of the fire sensor 2 connected to the terminal cannot be received, the determination unit 9 determines that the wire is disconnected. For example, the address of the sensor other than the sensor 2 connected to the terminal is determined. If at least one response signal cannot be received, it may be determined that a disconnection has occurred.

  In the above embodiment, when the same maximum address is given to the fire detector 2 connected to the end of each detector line L1, and the state response signal of the maximum address cannot be received, the detector Although the line L1 is determined to be broken, the same address is given to the fire sensor 2 connected to the end of each sensor line L1, and the state response signal of the same address cannot be received. The line L1 may be determined to be disconnected, and the disconnection determination process (program) for each sensor line L1 can be shared.

  Further, various storage units such as the receiver storage unit 7 are provided with a database for storing the address of the fire detector 2 connected to the terminal for each sensor line L1, and the fire detector 2 connected to the terminal is stored. When the address status response signal cannot be received, it may be determined that the sensor line L1 is disconnected.

  Further, various storage units such as the receiver storage unit 7 are provided with a database for storing the addresses of all connected fire detectors 2 for each sensor line L1, and all the connected fire detectors 2 are provided. When the address status response signal cannot be received, it may be determined that the sensor line L1 is disconnected.

  100 Fire alarm equipment, 1 P-type fire receiver, 2 Fire detector, 3 Fire receiver circuit, 4 Receiver control unit, 5 Display unit, 6 Operation unit, 7 Receiver unit billion, 8 Receiver communication unit, 9 Discrimination , 10 detection unit, 11 sensor communication unit, 12 sensor storage unit, 13 sensor control unit.

Claims (3)

Multiple sensor lines,
A P-type fire receiver connected to the plurality of sensor lines and detecting a fire and a disconnection in each sensor line;
In a fire alarm facility comprising a plurality of fire detectors connected to the fire receiver via each sensor line and outputting a fire signal by switching operation,
The above fire receiver
A plurality of transmission / reception means for performing signal transmission for each of the sensor lines;
A status confirmation signal is transmitted to each of the fire detectors for each of the sensor lines via each of the transmission / reception means, and transmitted from each of the fire sensors in response to the status confirmation signal. A state response signal collecting means for receiving the state response signal and collecting the state response signal of each of the fire detectors;
Disconnection detection means for determining that the sensor line is disconnected when the state response signal cannot be received from the fire sensor connected to the end of each sensor line,
A fire alarm system comprising:
The state response signal collecting means simultaneously transmits a state confirmation command to each of the transmission / reception means, and each transmission / reception means that has received the state confirmation instruction receives the state in order of the connected sensor lines one by one. A fire alarm system that transmits a confirmation signal .
Each fire detector is assigned an address up to a predetermined number for each sensor line, and each fire detector for each sensor line has an address up to the predetermined number. Granted individually,
The state confirmation signal and the state response signal are transmitted in association with the address,
The same address is given to the fire sensor connected to the end of each sensor line ,
When the fire receiver is activated, it sends the status confirmation signal associated with the address,
It is determined whether or not a status response signal is received from a fire sensor connected to the end of each sensor line, and the status line is received from the fire sensor connected to the end of the sensor line. 2. The fire alarm system according to claim 1 , wherein the disconnection monitoring process is performed only by the state response signal collecting unit and the disconnection detecting unit .
The fire alarm system according to claim 2, wherein the same address is a final address.