JP6225462B2 - Disaster prevention reception system - Google Patents

Description

  The present invention relates to an improvement of a disaster prevention reception system in which time division multiplexing communication is performed between a receiver and a sensor.

  Conventionally, various systems have been proposed for communication between a receiver and a detector in a disaster prevention reception system such as an automatic fire alarm system. For example, fire receivers are roughly classified into P type and R type. In the former case, the electrical contact of the sensor is closed, and an abnormal signal is transmitted when a current flows through the sensor line. On the other hand, in the latter case, an address is set in the sensor, and an abnormal signal is transmitted by communication.

  Furthermore, various systems have been proposed even for the time division multiplex transmission system, which is the latter communication system. Specifically, for example, as described in the following Patent Documents 1 and 2, there are a method of transmitting an abnormal signal by polling, a method of transmitting an abnormal signal by an interrupt signal, and the like.

  Patent Document 3 discloses a fire alarm facility that can monitor a fire in the new equipment part when only the part of the entire equipment is replaced with the new equipment when the old fire alarm equipment is renewed to the new fire alarm equipment. Have been described.

JP 05-334573 A JP 05-037772 A JP 2008-242648 A

  However, Patent Document 3 does not describe an isolator. Therefore, when trying to renew the disaster prevention reception system installed in the facility, if the isolator is included therein, the configuration of Patent Document 3 cannot be adopted as it is. Therefore, the present invention uses a sensor compatible with the first communication method and a sensor compatible with the second communication method, appropriately monitors and controls them, and an isolator included in the system is also appropriate. The purpose is to provide a disaster prevention reception vision system that can be monitored.

In order to achieve the above object, the present invention is a disaster prevention reception system capable of using two types of detectors having different communication methods from each other, and a plurality of systems of first method line connections corresponding to the first communication method, A receiver having a short circuit detection circuit for detecting a short circuit of the primary line connected to the connection unit for each system, a receiver connection unit connected to the primary line, and a plurality corresponding to the second communication method 2nd system line connection part of system, communication system conversion circuit for converting communication system interposed between these connection parts, receiver connection when short circuit of secondary line connected to 2nd system line connection part is detected A communication system conversion repeater having a short-circuit transmission circuit for transmitting a short circuit signal from the unit, and a plurality of isolators that block each of the sensing lines connected to the second system line connection unit of the communication system conversion repeater. The first communication method The second communication method is a non-interrupt method for transmitting the sensor notification by a reply signal to the cyclic polling, and the second communication method is a non-interrupt method for transmitting the sensor notification by the interrupt signal. When one of the plurality of isolators is activated, the communication system conversion repeater detects the operation and transmits a short circuit signal to the primary line, and when the receiver detects the short circuit signal, each of the plurality of isolators The connection command is transmitted in order, and it is investigated whether or not the short-circuit signal is returned in response to the connection command, and the activated isolator is specified based on the survey result.

The communication system conversion circuit of the communication system conversion repeater includes an address in the secondary line of the sensor and isolator arranged on the secondary line, and a primary when the receiver designates the sensor and isolator. You may hold | maintain the address conversion table linked | related with the address in a circuit | line.

The communication system conversion circuit of the communication system conversion repeater may transmit the connection command to each of the plurality of isolators after performing address conversion according to the address conversion table.

  According to the present invention, the sensor corresponding to the first communication method and the sensor corresponding to the second communication method are used together, and these sensors are appropriately controlled and monitored by a common receiver. The receiver can also properly monitor the isolator included in the system.

It is a system outline figure showing one embodiment of the present invention. It is a table | surface which shows an example of the registration content of an address table. It is a table | surface which shows an example of the registration content of an address conversion table. It is a basic communication flow figure at the time of abnormality in the system shown in FIG. FIG. 2 is a basic communication flow diagram when a line is short-circuited in the system shown in FIG. 1.

An embodiment of the present invention is shown in the system outline diagram of FIG.
The present invention is a disaster prevention reception system constituting an automatic fire alarm facility installed in a building such as a building.

  The disaster prevention reception system 1 is characterized in that a plurality of types of sensors 20 having different communication methods can be used in combination. Therefore, the disaster prevention reception system 1 includes, as a basic configuration, a sensor 20A corresponding to the first communication method on the primary line L1 of the receiver 10 and a communication method conversion repeater (hereinafter simply referred to as a repeater) 30. It has a basic configuration in which a sensor 20B corresponding to the second communication method is connected to the secondary line L2 of the repeater 30. An isolator 40 is provided upstream of the detectors 20A and 20B in both the primary line L1 and the secondary line L2.

  There are no particular restrictions on the first and second communication methods. However, in this embodiment, as the first communication method, polling with an interrupt function and time division multiplex transmission by a selecting method (hereinafter referred to as an interrupt method) are assumed. As a second communication method, time division multiplex transmission in a polling and selecting method (hereinafter referred to as a non-interrupt method) without an interrupt function is assumed.

  Polling and selecting methods are one of widely known communication methods. In other words, polling is a telegram in which the control station inquires of the terminal device about the presence or absence of transmission data. In response thereto, the terminal device basically returns transmission data, but if there is no transmission data, it returns no data.

  Selecting is a message for inquiring about the preparation for reception of the terminal from the control station. In response to this, the terminal returns a preparation for reception if data can be received, and the control station transmits the data after confirming that. To do. On the other hand, when the terminal returns that reception is impossible, the control station stops data transmission.

  In general, when the disaster prevention reception system is configured in a non-interrupt system, the receiver controls the detectors by appropriately transmitting various commands by the selecting, while each of the detectors is controlled by the polling. Are monitored cyclically. In the event of an emergency such as the occurrence of a fire, the sensor returns an abnormality notification to the polling. Based on the abnormality notification, the receiver performs predetermined processing such as a fire alarm and a ringing of the district.

  On the other hand, when the disaster prevention reception system is configured by an interrupt method, the receiver appropriately transmits various commands by the above-described selecting to control the sensor, while repeating dummy polling, Monitor outgoing interrupt signals. In the normal state, the sensor does not respond to the dummy polling at all, but in an emergency, the sensor spontaneously transmits an interrupt signal in synchronization with the dummy polling.

  Since the interrupt signal is an irregular signal, it is not limited to a signal format defined by polling or selecting, and may be a short-circuit pulse signal, for example. When the receiver detects an interrupt signal, it performs interrupt address polling for all the sensors in the system. The sensor that has transmitted the interrupt signal returns its own address in response to the interrupt address polling. The receiver polls the sensor specified by the address, and executes predetermined processing such as a fire alarm and a ringing of the area based on the abnormality notification returned from the sensor.

  Comparing the non-interrupt method with the interrupt method, the former has a simple mechanism. However, since the receiver cyclically monitors each of the sensors by polling, it may take a considerable amount of time for the receiver to receive a sensor malfunction notification. On the other hand, the latter has a complicated mechanism, but since the sensor detects an abnormality and sends an interrupt signal spontaneously, the time until the receiver receives the abnormality notification of the sensor is short and constant. become.

  In this embodiment, the receiver 10 of the disaster prevention reception system 1 corresponds to the interrupt method. Therefore, the receiver 10 includes, as elements according to the present invention, a plurality of systems of the first system line connection units 10a corresponding to the first communication system, and the primary line L1 connected to these first system line connection units 10a. A short circuit detection circuit 10b for detecting a short circuit for each system is provided. Although the number of systems of the primary line L1 is not limited, it is assumed that there are 2 systems for simplicity.

  That is, the receiver 10 is configured to assume that terminals such as the sensor 20A and the isolator 40 are connected by the primary lines L1 # 1 and L1 # 2 of the first and second systems. However, actually, the repeater 30 is connected to the primary line L1 # 1, and the isolator 40 and the sensor 20A corresponding to the first communication method are connected to the primary line L1 # 2. The repeater 30 is connected to the isolator 40 and the sensor 20B corresponding to the second communication system by the first and second secondary lines L2 # 1 and L2 # 2.

  Here, for example, it is assumed that the sensor 20B is installed in each of the 101-103, 201, and 202 rooms of the building. The sensors 20B installed in the rooms 101-103 are all connected to the secondary line L2 # 1, and the sensors 20B installed in the rooms 201 and 202 are both connected to the secondary line L2 # 2. ing.

  In this case, system numbers and addresses (primary line addresses) of the sensor 20B, the isolator 40, and the repeater 30 are registered in the address table 10c as terminals connected to the primary line L1 # 1. As a terminal connected to the primary line L1 # 2, the system number and address (primary line address) of the sensor 20A and the isolator 40 are registered. That is, in the address table 10c, the address when the sensor 20B actually connected to the secondary lines L2 # 1 and L2 # 2 is considered to be connected to the primary line L1 # 1 is registered. The

  The table of FIG. 2 shows an example (only a part) of the registered contents of the address table 10c. In this table, the system number 1 and the primary line address 11-13 of the sensor 20B in the 101-103 room are registered. The system number 2, primary line addresses 21 and 22 of the sensor 20B in the rooms 201 and 202 are also registered. Furthermore, the system number 1 and primary line address 101 of the isolator 40 and the system number 1 and primary line address 301 of the repeater 30 are also registered.

  Although not shown, the system number and primary line address of the terminal 20A belonging to the second system are also registered in the address table 10c in the same manner.

  The receiver 10 polls and selects the sensors 20A and 20B, the isolator 40, and the repeater 30 based on the system number and the primary line address registered in the address table 10c.

  As shown in FIG. 1, the repeater 30 includes a receiver connection unit 30a connected to the first method line connection unit 10a of the receiver 10, and a second method line connection unit corresponding to the second communication method. 30b. The number of systems of the second system line connection unit 30b is not limited, but is assumed to be 2 systems for simplicity. If the repeater 30 can handle multiple secondary lines, a large-scale system can be renewed at a low cost.

  The repeater 30 is provided with a communication system conversion circuit 30c and a short-circuit transmission circuit 30d. The communication system conversion circuit 30c performs communication system conversion including address conversion of the terminal between the receiver connection unit 30a and the second system line connection unit 30b. When the short circuit detection circuit 30d detects a short circuit of the secondary lines L2 # 1 and L2 # 2 connected to the second system line connection unit 30b, the short circuit detection circuit 30d transmits a short circuit signal from the receiver connection unit 30a.

  In the address conversion table 30e, an address (secondary line address) when the repeater 30 designates a terminal connected to the secondary lines L2 # 1 and L2 # 2 is received by the same terminal. 10 is registered in association with the primary line address at the time of designation.

  The table of FIG. 3 shows an example (part) of the registered contents of the address conversion table 30e. Here, it is assumed that the sensor 20B installed in the 101-103 room is connected to the secondary line L2 # 1 and assigned the system number 1 and the secondary line address 11-13. In addition, it is assumed that the sensor 20B installed in the rooms 201 and 202 is connected to the secondary line L2 # 2, and the system number 2 and the secondary line addresses 11 and 12 are assigned.

  In this table, the system number 1 and the secondary line address 11-13 of the sensor 20B in the 101-103 room, the system number 1 and the secondary line address 101 of the isolator 40 correspond to the corresponding primary line addresses 11-13 and 101, respectively. It is associated and registered. Similarly, the system number 2, secondary line addresses 11, 12 of the sensor 20B in the rooms 201 and 202, the system number 2, address 101 of the isolator 40 are associated with the corresponding primary line addresses 21, 22, 102. It is registered. Here, the primary line address and the secondary line address of the same terminal may be the same or different.

  As a modification, the relay may define an address conversion rule instead of providing an address conversion table. For example, as a rule, the address (secondary line address) of the terminal connected to the secondary line of the first system is notified to the receiver as it is. The address of the terminal connected to the second and subsequent secondary lines may be notified to the receiver by adding a predetermined offset to the address of the terminal of the previous system. .

  Here, the basic operation of the entire disaster prevention reception system 1 will be briefly described. At normal time, the receiver 10 monitors the interrupt signal transmitted from the repeater 30 and the sensor 20A connected to the primary lines L1 # 1 and L1 # 2 by repeating dummy polling. In parallel with this, the repeater 30 monitors the sensor 20B connected to the secondary lines L2 # 1 and L2 # 2 by its own, ie, cyclic polling not by the receiver 10, If there is an abnormality, an interrupt signal is transmitted to the receiver 10. When the receiver 10 detects an interrupt signal, it performs interrupt address polling to identify the sensor 20A, 20B that has transmitted the interrupt signal, and if necessary, detects the sensor by polling or selecting. 20A is monitored and controlled. Here, polling and selecting of the receiver 10 with respect to the sensor 20B connected to the secondary lines L2 # 1 and L2 # 2 are relayed by the repeater 30. With such a configuration, the single receiver 10 can appropriately monitor and control both the sensor 20A corresponding to the first communication method and the sensor 20B corresponding to the second communication method.

  Since the operation for the sensor 20A and the isolator 40 connected to the primary line L1 # 2 of the receiver 10 is the same as that of the conventional receiver, detailed description thereof is omitted. Hereinafter, operations of the receiver 10 and the repeater 30 for the sensor 20B and the isolator 40 connected to the secondary lines L2 # 1 and L2 # 2 will be described in detail with reference to flowcharts.

  FIG. 4 is a flowchart showing an example of the operation of the receiver and the repeater when the sensor detects an abnormality.

  The repeater 30 monitors each of the sensors 20B by cyclic polling (time T1). Here, the system number to be polled and the address of the terminal are registered in the address conversion table 30e. When the sensor 20B detects an abnormality and returns an abnormality notification in response to cyclic polling (time T2), the repeater 30 temporarily stores the system number and secondary line address of the sensor 20B. Then, an interrupt signal is transmitted to the receiver 10 (time T3).

  When the receiver 10 that detected the interrupt signal performs interrupt address polling, the repeater 30 converts the stored system number and secondary line address based on the registered contents of the address conversion table 30e. The subsequent primary line address is returned (time T4). In this address conversion, for example, if the sensor 20B is connected to the secondary line L2 # 2 (installed in the room 201), the system number 2 and the secondary line address 11 are the primary line address. 21 is converted. The repeater 30 may store the converted primary line address instead of the system number before conversion and the secondary line address.

  The receiver 10 polls the terminal of the primary line address returned for the interrupt address polling. The electronic message is address-converted by the repeater 30, and then transmitted to the sensor 20B that senses the abnormality. The address conversion at this time is in the reverse direction as described above, and the primary line address 21 is converted to the system number 2 and the secondary line address 11. The sensor 20B that has received the electronic message returns an abnormality notification (time T5). Upon receiving the abnormality notification, the receiver 10 determines the content and executes a predetermined abnormality notification process (time T6).

  FIG. 5 is a flowchart showing an example of the operation of the receiver and the repeater when the isolator cuts off the shorted secondary line.

  For example, when the secondary line L2 # 2 is short-circuited, both the isolator 40 and the repeater 30 detect the short-circuit (time T1). The isolator 40 activates a built-in relay (not shown) after a predetermined time (for example, 0.75 seconds) after the short circuit is detected, and shuts off the secondary line L2 # 2, and further within a predetermined time (for example, within 10 seconds). (Remains the shut-off state). On the other hand, the repeater 30 also transmits a short circuit signal to the receiver 10 based on its own short circuit detection (time T2). The short circuit signal may be, for example, a 1 second short circuit pulse signal.

  The isolator 40 transmits a short circuit notification to the repeater 30 after a predetermined time has elapsed after detecting the short circuit, and the repeater 30 receives the short circuit notification and transmits a short circuit signal to the receiver 10. Good. The repeater 30 may consider that the isolator 40 has transmitted a short circuit notification by detecting recovery from a short circuit. That is, the repeater 30 may transmit a short circuit signal when it has been confirmed that the line L2 has been restored within a predetermined time after detecting the first short circuit of the secondary line L2 # 2. The repeater 30 can determine the operation of the isolator 40 by looking at the recovery from the short circuit. With such a configuration, the repeater 30 may transmit a short circuit signal immediately after the short circuit is detected after the second short circuit.

  Alternatively, as another configuration, the presence or absence of the isolator 40 may be registered in the repeater 30 in advance by a command from the receiver 10 or the like.

  The receiver 10 detects the short circuit signal as a short circuit of the primary line L1 # 1, and a connection is registered to the primary line L1 # 1 after a predetermined time (for example, 10 seconds or more) after the short circuit signal disappears. The connection command is transmitted to the isolator 40 in turn (time T3). The connection command may be transmitted by selecting. The message thus transmitted is address-converted by the repeater 30 and then transmitted to the isolator 40 connected to the secondary line L2 # 2. In the address conversion at this time, for example, the primary line address 201 of the isolator 40 is converted into the system number 2 and the secondary line address 101 based on the association in the address conversion table 30e.

  If the isolator 40 that has received the connection command is blocking the short-circuited secondary line L2 # 2, the secondary line L2 # 2 is released (reconnected) by the connection command, so the secondary line Line L2 # 2 is short-circuited again. However, if the isolator 40 that has received the connection command is in a normal state, no change occurs due to the connection command.

  When the secondary line L2 # 2 is short-circuited again by the connection command, both the isolator 40 and the repeater 30 detect the short-circuit (time T4). The repeater 30 transmits the short circuit signal again.

  The receiver 10 determines the cutoff state of the isolator 40 based on whether or not the short circuit of the line is detected again within a predetermined time (for example, within 2 seconds) after transmitting the connection command to the specific isolator 40. In this case, since the short circuit of the line is detected again within a predetermined time, it is determined that the isolator 40 to which the connection command is sent is in the cut-off state, and predetermined processing such as short circuit notification is executed (time T6). .

  With this configuration, the receiver 10 determines the cutoff state of the isolator 40 connected to the primary line L1, and similarly determines the cutoff state of the isolator 40 connected to the secondary line L2. Thus, short circuit notification or the like can be performed.

DESCRIPTION OF SYMBOLS 1 Disaster prevention receiving system 10 Receiver 10a 1st system line connection part 10b Short circuit detection circuit 20A (B) Sensor 30 Communication system conversion repeater 30a Receiver connection part 30b 2nd system line connection part 30c Communication system conversion circuit 30d Short circuit transmission Circuit 30e Address conversion table 40 Isolator

Claims (3)

A disaster prevention reception system that can use two types of sensors with different communication methods.
A receiver having a short-circuit detection circuit for detecting, for each system, a short circuit of a primary line connected to the first system line connection unit of a plurality of systems corresponding to the first communication system;
A receiver connection section connected to the primary line , a plurality of second system line connection sections corresponding to the second communication system, and a communication system conversion circuit for converting the communication system interposed between these connection sections , a communication mode conversion repeater having a short transmission circuit for transmitting a short signal from the receiver connecting portion and detects the short circuit of the connected second order line to the second mode line connection portion,
A plurality of isolators that cut off each of the sensing lines connected to the second system line connection part of the communication system conversion repeater,
The first communication method is an interrupt method for transmitting a sensor alert by an interrupt signal.
The second communication scheme, Ri non-interrupt mode der transmitting the alarm of the detector by the reply signal to the cyclical polling,
When one of the plurality of isolators operates, the communication system conversion repeater detects the operation and transmits a short circuit signal to the primary line, and when the receiver detects the short circuit signal, Disaster prevention , characterized in that a connection command is transmitted to each in turn, whether or not the short-circuit signal is returned in response to the connection command, and an isolator that has been activated is identified based on the survey result Receiving system. In the disaster prevention receiving system according to claim 1 ,
1 when the communication method conversion circuit of the communication mode conversion repeater, the two sensors arranged in the primary line, and two address definitive next line of the isolator, in which the receiver is their sensor, designates an isolator A disaster prevention receiving system characterized by holding an address conversion table for associating with an address on the next line . In the disaster prevention receiving system according to claim 2 ,
The communication system conversion circuit of the communication system conversion repeater transmits the connection command to each of the plurality of isolators after performing address conversion according to the address conversion table.

Images