JP2006099394A - Fire detection system and method for controlling the same system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fire detection system whose configurations can be simplified and a method for controlling the fire detection system. <P>SOLUTION: Fire detection units 5A to 5J are respectively provided with a sensor 3 for detecting the dangerous status of fire occurrence or a fire, a detection signal transmitting part 13 for transmitting a detection signal F including predetermined address information Ad when the dangerous status of the fire occurrence or the fire has been detected by the sensor 3 and a transmission source specifying part 25 having a signal transmitting/receiving function with the adjacent fire detection unit 5 or an adjacent processing part 6 for specifying the transmission source of the signal by using a value Ad and a predetermined number S shown by the address information included in the signal received from the fire detection unit 5J positioned at the lowermost stream. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a fire detection system and a control method of the fire detection system, and relates to an apparatus for monitoring a wide detection area using a large number of fire detection units, and by using a simple connection method, address setting of each fire detection unit is performed. The present invention relates to a fire detection system that can identify a fire location without performing the above and a method for controlling the fire detection system.

  2. Description of the Related Art Conventionally, a fire detection system has been used that can detect the occurrence of a fire and specify its location by scattering a plurality of fire detection units in an area to be detected. FIG. 11 is a diagram illustrating an example of a conventional fire detection system 91 disclosed in Patent Document 1. In FIG.

  In FIG. 11, 92 is a fire detection unit installed in each part of the area to be detected, and 93 is connected to each fire detection unit 92 to control them and receive detection signals from each fire detection unit 92. A processing unit 94 for identifying a portion where a fire has been detected is a multiplex transmission line configured to connect the processing unit 93 and each fire detection unit 92 to perform bidirectional communication.

  For example, the processing unit 93 issues a token call in order of each fire detection unit 92 address, and each fire detection unit 92 responds to the processing unit 93 with a detection result when a token call of its own address is made. It is configured to be able to. In the fire detection system 91 constituting such a network such as a token ring network, each fire detection unit 92 is assigned an individual unique address, so that each fire detection unit 92 and the processing unit 93 are multiplexed in one. Necessary information can be exchanged by sharing and using the transmission line 94.

Therefore, since each fire detection unit 92 is set with a unique address that does not overlap with other fire detection units 92, the processing unit 93 connects many fire detection units 92 to one multiplex transmission line 94. Even if the fire is detected, it is possible to identify the fire detection unit 92 that has detected the fire, and thereby to identify the fire occurrence part. Therefore, by using such a fire detection system 91, it is possible to always detect whether or not a fire has occurred, and to immediately perform a fire extinguishing activity in the event of a fire.
Japanese Patent Laid-Open No. 11-96470

  However, in the fire detection system 91 as described above, it is extremely important to assign and set a unique address in advance so that each fire detection unit 92 does not overlap with the others. For this reason, when the number of fire detection units 92 exceeds several tens, the setting of the addresses of the fire detection units 92 is very complicated and troublesome. In addition, it is conceivable that the setting of the address may be wrong due to an operation error of each fire detection unit 92, which causes poor communication between the fire detection unit 92 and the processing unit 93, and communication such as the token ring network can be performed normally. There was a case where there was no area where fire could not be detected.

  In addition, special hardware (for example, a setting switch) for identifying the unique address to each fire detection unit 92 is required, and a circuit for forming a complex network in each fire detection unit 92 And software are required, there is a problem that the manufacturing cost of the fire detection unit 92 increases. Since the multiplex transmission line 94 capable of performing the bidirectional communication is generally expensive, there is a problem that the manufacturing cost of the fire detection system 91 is increased in this respect as well.

  In addition, in the conventional fire detection system 91, when the fire detection unit 92 is replaced in response to a failure caused by deterioration of the fire detection unit 92, the fire detection unit 92 is first assigned to the fire detection unit 92 before replacement. It was necessary to check the address that was assigned and assign the same address as before to the newly installed fire detection unit 92.

  Further, in order for the processing unit 93 to check the operation of all the fire detection units 92, it is necessary to call the addresses of each fire detection unit 92 one by one and check the operation. That is, not only a long communication time is required only for the operation check, but also the processing unit 93 is assigned to each fire detection unit 92 as well as the number of each fire detection unit 92 connected to the multiplex transmission line 94. It was necessary to recognize the address that was being used from the beginning. Alternatively, it is necessary for the processing unit 93 to check the number and address of each fire detection unit 92 connected to the multiplex transmission line 94 using a more complicated communication protocol, which requires more complicated circuits and software. There was a problem of needing.

  The present invention has been made in consideration of the above circumstances, and its purpose is to simplify installation work such as wiring and setting, and to simplify the configuration of each fire detection unit. It is to provide a fire detection system and a control method for the fire detection system.

  In order to achieve the above object, a fire detection system according to a first aspect of the present invention sequentially connects a plurality of fire detection units, a processing unit for processing a signal from each fire detection unit, and adjacent fire detection units. And a communication line connecting the processing unit adjacent to the most upstream fire detection unit and the most downstream fire detection unit, and each fire detection unit has a risk of fire occurrence and / or fire. A detection sensor, a detection signal transmitter for transmitting a detection signal including predetermined address information when the sensor detects a dangerous state of fire and / or a fire, and an adjacent fire detection unit or an adjacent processing unit Address information included in the signal received from the upstream fire detection unit or processing unit And a communication unit having a function of transmitting a predetermined number to a fire detection unit adjacent to the downstream side or a processing unit, and the processing unit is included in the signal received from the fire detection unit at the most downstream position A transmission source specifying unit that specifies the transmission source of this signal using the value indicated by the address information and the predetermined number is provided (claim 1). Note that the predetermined number may be a negative value as well as a positive value. In this case, the addition performed by the communication unit means subtraction.

  The fire detection system according to the second invention includes a plurality of fire detection units, a relay processing unit that performs communication with each fire detection unit, communication with a host system or another system, display, and operation, and an adjacent fire detection unit. And a communication line for connecting the processing unit adjacent to the most upstream fire detection unit and the most downstream fire detection unit, and each fire detection unit has a risk of fire. A detection unit that detects a state and / or a fire and transmits a detection signal including predetermined address information, a reception unit that receives a signal from another fire detection unit or relay processing unit, and another fire detection for each signal A transmission unit to be transmitted to the unit or the relay processing unit, and a detection signal from the detection unit is output to the transmission unit, and the value indicated by the address information of the signal received by the reception unit is a predetermined number A signal processing unit that outputs a signal obtained by adding to the transmission unit, and the processing unit calculates a value indicated by address information included in the signal received from the fire detection unit at the most downstream position and the predetermined number. And a transmission source specifying unit for specifying the transmission source of this signal. (Claim 2) Note that the predetermined number may be a negative value as well as a positive value. In this case, the addition performed by the communication unit means subtraction.

  A fire detection system according to a third aspect of the present invention sequentially connects a plurality of fire detection units, a processing unit that processes a signal from each fire detection unit, and an adjacent fire detection unit, and connects the processing unit to the most upstream side of the signal. And a communication line connected so as to be adjacent to the most downstream fire detection unit, and the processing unit sends an initial setting signal including address information based on the initial address value to the most upstream fire detection While each unit has an initial setting unit that transmits to the unit, each fire detection unit has a signal transmission / reception function between the fire detection danger state and / or the fire detection sensor and the adjacent fire detection unit or the adjacent processing unit. In addition, a predetermined number is added to the value indicated by the address information included in the initial setting signal received from the fire detection unit or processing unit adjacent to the upstream side. Then, a communication unit having a function of transmitting to the fire detection unit or processing unit adjacent to the downstream side and a value indicated by the address information included in the initial setting signal received from the fire detection unit or processing unit adjacent to the upstream side is used. An address automatic setting unit that sets the address as its own address, and a detection signal transmission unit that transmits a detection signal including address information based on the own address when the sensor detects a dangerous state of fire and / or a fire. The processing unit further includes a transmission source specifying unit that specifies the transmission source of the signal from the value indicated by the address information included in the received signal (claim 3). Note that the predetermined number may be a negative value as well as a positive value. In this case, the addition performed by the communication unit means subtraction.

  The communication line may be a serial communication line.

  Each of the fire detection units and the processing unit includes a reception port that connects the upstream communication line and a transmission port that connects a downstream communication line, and the reception port is connected upstream via the upstream communication line. May be connected to a transmission port of a fire detection unit or processing unit adjacent to the transmission port, and the transmission port may be connected to a reception port of a fire detection unit or processing unit adjacent to the downstream side via a downstream communication line. (Claim 5). It is desirable that a buffer for transmission data and / or reception data is provided at the transmission port and / or reception port.

  The processing unit may include an operation confirmation unit that periodically transmits an operation confirmation signal to the most upstream fire detection unit at predetermined intervals to confirm the operation of each fire detection unit. . Furthermore, each fire detection unit measures the time from the time when the operation confirmation signal is received to the time when the next operation confirmation signal is received, and this time becomes longer than the predetermined interval by an allowable time or more. In addition, an abnormality signal transmission unit that transmits an abnormality signal to the downstream fire detection unit or the processing unit may be provided.

  According to a fourth aspect of the present invention, there is provided a fire detection system control method comprising: sequentially connecting a plurality of fire detection units, a processing unit that processes a signal from each fire detection unit, and an adjacent fire detection unit; In a fire detection system having a fire detection unit on the most upstream side and a communication line connected adjacent to the fire detection unit on the most downstream side, each fire detection unit has detected a dangerous state of fire and / or a fire. Sometimes, a detection signal including predetermined address information is transmitted to a fire detection unit or processing unit adjacent to the downstream side, and when a signal is received from a fire detection unit or processing unit adjacent to the upstream side, it is included in this signal. Add a predetermined number to the value indicated by the address information and send it to the adjacent fire detection unit or processing unit on the downstream side, The management unit is characterized in that the source of the signal is specified by using the value indicated by the address information included in the signal received from the fire detection unit at the most downstream position and the predetermined number (Claim 8). . The predetermined number may be not only a positive number but also a negative number, and addition of a negative number means subtraction of its absolute value.

  According to a fifth aspect of the present invention, there is provided a fire detection system control method comprising: sequentially connecting a plurality of fire detection units; a processing unit that processes a signal from each fire detection unit; and an adjacent fire detection unit; In a fire detection system having a communication line connected so as to be adjacent to the most upstream fire detection unit and the most downstream fire detection unit, the processing unit outputs an initial setting signal including address information based on the initial value of the address. The value indicated by the address information included in the received initial setting signal when it is sent to the most upstream fire detection unit and each fire detection unit receives the initial setting signal from the upstream fire detection unit or processing unit. Is used to initialize its own address, and a predetermined number is added to the value indicated by the address information contained in this initial setting signal. A fire detection unit that is sent to a fire detection unit or processing unit adjacent to the downstream side and detects a dangerous state of fire and / or a fire, and includes a detection signal including address information based on the address of the fire detection unit adjacent to the downstream side Alternatively, while transmitting to the processing unit, the processing unit specifies the transmission source of the signal from the value indicated by the address information included in the received signal (claim 9). The predetermined number may be not only a positive number but also a negative number, and addition of a negative number means subtraction of its absolute value.

  The processing unit periodically transmits an operation confirmation signal including predetermined address information to the fire detection unit at the most upstream position at predetermined intervals, and receives the operation confirmation signal from the fire detection unit at the most downstream position. The operation of the fire detection unit may be confirmed (claim 10). In addition, when each fire detection unit measures the time from the time when the operation confirmation signal is received to the time when the next operation confirmation signal is received, and this time is longer than the predetermined interval by an allowable time or more In addition, the abnormal signal may be transmitted to the control method or processing unit of the downstream fire detection system (claim 11).

  According to the fire detection system of the first invention and the second invention having the characteristic configuration as in claim 1 and claim 2, when each fire detection unit detects a fire, a detection signal including the same predetermined address information is provided. Since this is a transmission, there is no need to assign an address to each fire detection unit in advance. That is, a special device (for example, a switch such as a dip switch) for setting an address in each fire detection unit is not required, and the configuration of each fire detection unit can be simplified as much as possible.

  Each fire detection unit transmits a detection signal including the same predetermined address information, and each downstream fire detection unit adds a specific number to the address information. By obtaining the number of times the predetermined number is added from the address information included in the detection signal received from the detection unit, the fire detection unit from which this detection signal has been transmitted can be specified.

  Further, since the communication unit performs a simple addition operation on the address information, the circuit configuration or software configuration can be simplified, and the manufacturing cost of the fire detection system can be reduced accordingly. Then, the transmission source specifying unit performs the relatively simple calculation process of dividing the number added (or subtracted) to the address information by a predetermined number, so that the number of the fire detection unit from the most downstream fire detection unit Can be determined as a source of Since the addition and subtraction and division are processes that can be easily performed by a simple arithmetic circuit or software, the apparatus is not unnecessarily complicated.

  If the specific number is 1 or −1, the addition / subtraction performed by the communication unit can be realized by a circuit that performs an extremely simple increment process or decrement process, and the transmission source specifying unit also performs no division. Since the transmission source can be specified, further simplification of the circuit configuration or software configuration of the communication unit can be achieved.

  According to the fire detection system of the third invention having the characteristic configuration as in claim 3, when each fire detection unit receives the initial setting signal transmitted from the processing unit, the address automatic setting unit has its own address. Is automatically set, and the communication unit adds a predetermined number to the value indicated by the address information and transmits it to the downstream fire detection unit, so even if an address is not assigned to each fire detection unit in advance, it is assigned to each fire detection unit. Addresses that do not overlap with each other can be set automatically. That is, a special device (for example, a switch such as a dip switch) for setting an address in each fire detection unit is not required, and the configuration of each fire detection unit can be simplified as much as possible.

  When each fire detection unit detects a dangerous state of fire and / or a fire, it sends a detection signal including the address information set automatically as described above. The fire detection unit from which the detection signal is transmitted can be easily identified.

  Since the communication unit performs a simple addition operation on the address information included in the initial setting signal, the circuit configuration or software configuration can be simplified, and the manufacturing cost of the fire detection system can be reduced accordingly. Can be reduced. Further, if the specific number is 1 or -1, addition / subtraction performed by the communication unit can be realized by a circuit that performs an extremely simple increment process or decrement process. Further simplification of the configuration can be achieved.

  Accordingly, in any of the fire detection systems of the first to third inventions, it is not necessary to set an address for each fire detection unit, so only by connecting each fire detection unit and the processing unit in a ring shape by a communication line, This can be operated as a fire detection system, and installation work becomes extremely easy. Also, when replacing a fire detection unit that has malfunctioned, it is not necessary to assign an address, so you only need to replace it with another fire detection unit. It can be eliminated, and troubles such as communication failure due to incorrect address setting do not occur.

  When the communication line is a serial communication line (Claim 4), the configuration of the communication line is simple. In other words, in the case of serial communication, the connection between each fire detection unit is only one signal line, which is very simple. Note that even if power lines are wired simultaneously as communication lines, there are only three lines of two power lines and one signal line. In addition, since all the fire detection systems of the present invention have a unidirectional signal flow, it is expensive to perform two-way communication as a communication line like the conventional fire detection system 91 shown in FIG. It is not necessary to use a multiplex transmission line 94, and the wiring cost can be reduced.

  Each of the fire detection units and the processing unit includes a reception port that connects the upstream communication line and a transmission port that connects a downstream communication line, and the reception port is connected upstream via the upstream communication line. Is connected to the transmission port of the fire detection unit or processing unit adjacent to the transmission port, and the transmission port is connected to the reception port of the fire detection unit or processing unit adjacent to the downstream side via a downstream communication line (invoice) In item 5), the data communication is performed by the communication line from the transmission port to the reception port between the adjacent fire detection units or processing units. Compared with a signal that flows through all signals, noise is less likely to be superimposed and reliability is improved. In addition, since it is possible to communicate different information through each communication line, for example, when multiple fire detection units detect a fire at the same time, the processing unit receives all detection signals reliably and efficiently. Is possible.

  By providing transmission data and / or reception data buffers in the transmission port and / or reception port, problems such as poor communication are unlikely to occur when a plurality of data are communicated using each signal line. Therefore, the reliability can be further improved.

  When the processing unit includes an operation confirmation unit that periodically transmits an operation confirmation signal to the most upstream fire detection unit at predetermined intervals to confirm the operation of each fire detection unit (Claim 6). Can confirm the operation of each fire detection unit and the communication line only by confirming the response by the operation confirmation unit transmitting a single operation confirmation signal. That is, unlike the one having a token ring network as shown in FIG. 11, it is not necessary to sequentially scan each fire detection unit and check its operation.

  Each of the fire detection units measures the time from the time when the operation confirmation signal is received to the time when the next operation confirmation signal is received, and when this time becomes longer than the predetermined interval by an allowable time or more, When an abnormal signal transmission unit is provided for transmitting an abnormal signal to the fire detection unit or processing unit on the side (Claim 7), a portion where communication is disabled due to an abnormality of the fire detection unit and / or communication line occurs. Even in this case, the abnormal signal transmission unit of the fire detection system on the downstream side of this transmits an abnormal signal, so that the processing unit can recognize the occurrence of the abnormality by receiving this abnormal signal.

  According to the control method of the fire detection system of the fourth invention having the characteristic configuration as claimed in claim 8, the detection signal including the same address information when each fire detection unit detects the dangerous state of the fire and / or the fire. , It is not necessary to assign an address to each fire detection unit in advance.

  Each fire detection unit transmits a detection signal including the same address information, and each downstream fire detection unit performs a simple addition operation on the address information. The fire detection unit from the most downstream fire detection unit becomes the transmission source by a relatively simple calculation process that simply subtracts the number obtained by subtraction when the predetermined number is negative) by the predetermined number. It can be judged whether it is. If the specific number is 1 or -1, the addition (or subtraction) operation is an extremely simple increment (or decrement) and can be processed at high speed.

  According to the control method of the fire detection system of the fifth invention having the characteristic configuration as defined in claim 9, when each fire detection unit receives the initial setting signal transmitted from the processing unit, the address automatic setting unit Since its own address is automatically set and the communication unit adds a predetermined number to the value indicated by the address information and transmits it to the downstream fire detection unit, each fire detection unit can be assigned without assigning an address in advance. An address that does not overlap with the detection unit can be automatically set. When each fire detection unit detects a dangerous state of fire occurrence and / or a fire, it sends a detection signal including the address information set automatically as described above. It is possible to easily identify the fire detection unit from which is transmitted.

  Since each fire detection unit performs a simple addition (subtraction when the predetermined number is negative) to the address information included in the received initial setting signal and transmits it to the downstream side, it is very easy. In addition, processing can be performed at high speed. Furthermore, if the specific number is 1 or -1, the addition (or subtraction) operation performed by the communication unit is an extremely simple increment (or decrement), and therefore can be processed at high speed.

  In any of the fire detection system control methods of the fourth and fifth inventions, it is not necessary to set an address for each fire detection unit, so each fire detection unit and the processing unit are connected in a ring shape by a communication line. By simply doing this, it can be operated as a fire detection system, and installation work becomes extremely easy. Also, when replacing a fire detection unit that has malfunctioned, it is not necessary to assign an address, so you only need to replace it with another fire detection unit. It can be eliminated, and troubles such as communication failure due to incorrect address setting do not occur.

  The processing unit periodically transmits an operation confirmation signal including predetermined address information to the fire detection unit at the most upstream position at predetermined intervals, and receives the operation confirmation signal from the fire detection unit at the most downstream position. When confirming the operation of the fire detection unit (Claim 10), the processing unit transmits a single operation confirmation signal and confirms the response to confirm the operation of each fire detection unit and the communication line. be able to.

  Each fire detection unit measures the time from the time when it receives the operation confirmation signal until the time when it receives the next operation confirmation signal, and when this time becomes longer than the predetermined interval by an allowable time or more, When the signal is transmitted to the control method or processing unit of the fire detection system on the downstream side (Claim 11), even when a portion where communication is disabled due to an abnormality of the fire detection unit and / or communication line occurs, Since the fire detection system on the downstream side of this transmits an abnormality signal, the processing unit can recognize the occurrence of the abnormality by receiving this abnormality signal.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic diagram of a fire detection system 1 of, for example, an automobile carrier according to a first embodiment of the present invention. This system 1 measures the surface temperature of a vehicle 2 that is stored in a car storage room, for example. Then, the fire detection temperature sensor 3 for detecting the dangerous state of the fire and / or the fire is stored in the box 4 from the measured temperature information, and the entire detection target area is monitored according to the viewing angle of each temperature sensor 3 A plurality (10 in this example) of fire detection units 5 (hereinafter referred to as fire detection units 5A to 5J when distinction is necessary) arranged at some intervals so as to be possible, and each fire detection By connecting the processing unit 6 that controls the unit 5 to process the signal obtained from each fire detection unit 5 and the adjacent fire detection unit 5 and processing unit 6, an annular loop is formed as a whole. And a communication line 7 to form a line L.

  As an example, the temperature sensor 3 is a thermopile sensor capable of measuring a temperature distribution in a two-dimensional direction, and the processing unit 6 transmits a temperature distribution measured by each fire detection unit 5 to the processing unit 6 so that the processing unit 6 can detect the temperature distribution. It is configured so that it is possible to identify how much fire is in danger and / or where a fire has occurred in which part of the area. For example, when the temperature sensor 3 is used, the dangerous state of occurrence of fire indicates a state in which a high temperature close to the ignition point of an object disposed around is detected.

  Each fire detection unit 5 includes a reception port (an example of a reception unit) 5r that connects an upstream communication line 7 of a signal to be transmitted and a transmission port (an example of a transmission unit) that connects a communication line 7 on the downstream side. 5s. That is, the reception ports 5r of the fire detection units 5B to 5J are connected to the transmission ports 5s of the fire detection units 5A to 5I adjacent to the upstream side via the upstream communication line 7, and the reception ports of the fire detection units 5A to 5I. 5r is connected so as to be connected to the transmission port 5s of the fire detection units 5B to 5J adjacent to the upstream side via the communication line 7 on the upstream side.

  In addition, in order to simplify description in the present embodiment, an example is shown in which the number of fire detection units 5 constituting the fire detection system 1 is 10, but the present invention is not limited to this point. . That is, the fire detection system 1 of the present invention is particularly useful when many fire detection units 5 are connected.

  Similarly, the processing unit 6 transmits the transmission port 6s connected to the reception port 5r of the fire detection unit 5A on the most upstream side of the signal to be transmitted via the communication line 7 and the transmission of the fire detection unit 5J on the most downstream side. And a receiving port 6r connected to the port 5s via the communication line 7. In other words, the adjacent fire detection units 5 and the processing units 6 are connected by different communication lines 7 so that they can perform independent communication.

  Therefore, the length of each communication line 7 can be minimized, and one-to-one communication is performed by one communication line 7. Therefore, the influence of external noise entering the communication line 7 can be reduced. Can do. Therefore, the cost for the communication line 7 can be reduced.

  The communication line 7 is composed of, for example, two power lines and one signal line for serial communication. The power line is used to supply power from the processing unit 6 to each fire detection unit 5, and for example, The serial signal can be transmitted sequentially in the clockwise direction shown in the figure. Since the communication line 7 performs serial communication as in the present embodiment, the number of signal lines can be reduced to one, thereby reducing the cost of the communication line 7. However, the present invention is not limited to the case where the communication line 7 is for serial communication. Similarly, it is not an essential requirement to wire the power supply line of each fire detection unit 5 together with the signal line.

  FIG. 2 is a block diagram illustrating the configuration of each fire detection unit 5. Note that the block diagram shown in FIG. 2 summarizes the functions for explaining the present invention, so the configuration of the present invention is not limited to the configuration shown in this block diagram.

  In FIG. 2, 10 is a communication unit connected to the reception port 5r and the transmission port 5s, 11 is information such as command C, address information Ad, and data D received by the communication unit 10 (in the following description, address information indicates The fire detection unit 5 outputs a detection signal, such as a setting unit for setting each part using a value Ad), and a threshold value Th for a temperature at which a fire is detected and / or a temperature detected as a fire. A setting storage unit for storing various settings for performing the detection, and a detection signal transmission unit for transmitting the detection signal F in accordance with the contents such as the threshold level Th set in the setting storage unit 12 while being connected to the temperature sensor 3; Is a timer for measuring a time T (for example, several seconds) from the time when an operation confirmation signal N (described later) is received until the next operation confirmation signal N is received Timer 14 is abnormal signal transmitting unit for transmitting an abnormality signal E when measuring a long time allowable time t (for example, several seconds) than a predetermined distance T.

  When the communication unit 10 of the present embodiment receives a series of data from the fire detection unit 5 or the processing unit 6 adjacent to the upstream side via the reception port 5r, the communication unit 10 obtains the value Ad indicated by the address information included in the received signal. It is configured to increment (add 1 as the predetermined number S) and transmit to the fire detection unit 5 or the processing unit 6 adjacent to the downstream side via the transmission port 5s. That is, the operations of the units 10 to 15 are not complicated and can be easily integrated into a one-chip integrated circuit.

  The temperature sensor 3 and the detection signal transmission unit 13 function as a detection unit 5a that detects a dangerous state of fire and / or fire and transmits a detection signal F. Further, it is possible to form each of the units 10 to 12, 14 and 15 together as a single signal processing unit 5b. This signal processing unit 5a determines whether each signal is emitted from the detection unit 5a. If this signal is identified as being from the detector 5a, the detection signal F from the detector 5a is output to the transmitter, and the signal is identified as being from the receiver 5r Is configured so that a signal obtained by adding a predetermined numerical value to the value indicated by the address information of this signal can be output to the transmitter.

  FIG. 3 is a block diagram illustrating the configuration of the processing unit 6. Note that the block diagram shown in FIG. 3 also summarizes the functions for explaining the present invention, so the configuration of the present invention is not limited to the configuration shown in this block diagram.

  In FIG. 3, reference numeral 20 denotes a communication unit connected to a reception port (an example of a reception unit) 6 r and a transmission port (an example of a transmission unit) 6 s, and 21 denotes an initial setting signal I to the communication line L via the communication unit 20. An initial setting unit for transmitting and making various initial settings using the responses, 22 is a setting storage unit for storing various settings such as the total number Nall of the fire detection units 5 existing on the communication line L, and 23 is via the communication unit 20 The initial setting unit 24 transmits an operation confirmation signal N to the communication line L and confirms the response, and 24 measures the time from when the initial setting signal I and the operation confirmation signal N are transmitted until the response returns. And a transmission source specifying unit 25 that analyzes the detection signal F and the abnormal signal E from each fire detection unit 5 and specifies the transmission source of this signal.

  In addition, the processing unit 6 of the present embodiment is provided with a communication port 26 with a host computer or other system, and the specific information of the fire detection place analyzed by the transmission source specifying unit 25, the size information thereof, etc. It is configured to be able to communicate with other systems. Since the operations of the units 20 to 25 are relatively simple, they can be easily integrated into a one-chip integrated circuit.

  As described above, in the fire detection system 1 of the present embodiment, adjacent fire detection units 5 are sequentially connected by the communication line 7, and the most upstream fire detection unit 5A and the most downstream fire detection unit of the signal are connected. The processing unit 6 is connected so as to be adjacent to 5J, and the communication unit 10 of each fire detection unit 5 is included in the signals I, N, F, E received from the fire detection unit 5 or processing unit 6 adjacent to the upstream side. Since a predetermined number S is added to the address signal Ad and transmitted to the fire detection unit 5 or the processing unit 6 adjacent to the downstream side, each fire detection unit 5 needs to set its own address. Not at all.

  Therefore, not only can the configuration of each fire detection unit 5 be simplified as much as possible to reduce the manufacturing cost, but also the labor required for installation of the fire detection unit 5 can be reduced, and there is no malfunction caused by a setting error or the like. It can be.

  Hereinafter, the basic operation of the fire detection system 1 of the present embodiment shown in FIGS. 1 to 3 will be described with reference to FIGS. 4 to 7 by taking examples of the signals I, N, F, and E. FIG. 4 shows an example of signals I, N, F, and E transmitted by each communication line 7 in the overall configuration shown in FIG. Each program described with reference to the flowcharts shown in FIGS. 5 to 7 shows a specific configuration of each part 21, 23, 25 shown in FIG. That is, the initial setting unit 21, the operation confirmation unit 23, and the transmission source identification unit 25 all indicate a program for executing various operations by the CPU in the processing unit 6 or a computer-readable recording medium on which the program is recorded. . Needless to say, these may be formed by hardware such as an electronic circuit.

FIG. 5 is a diagram showing the operation of the initial setting program (initial setting unit) 21.
In FIG. 5, Si1 indicates a step of transmitting the initial setting signal I. Here, for example, a series of character strings “I000005” as the initial setting signal I is transmitted to the communication line L.

  Note that the signals I, N, F, and E transmitted through the communication line L of the present embodiment are, for example, a 1-byte command C, 3-byte address information Ad, and the like in common with all the following descriptions. This is a signal including 3-byte data D, and also includes error detection information such as parity check, checksum, CRC, frame error detection signal, termination information, and the like.

  When the initial setting signal I transmitted from the processing unit 6 is sequentially transmitted to the fire detection units 5A, 5B,..., The address information Ad is sequentially counted in each communication unit 10. Therefore, the initial setting signal I transmitted from the most downstream fire detection unit 5J to the processing unit 6 is “I010005”. Each fire detection unit 5 performs various settings such as the temperature threshold level Th detected by the setting unit 11 using the information “005” included in the data D in response to the reception of the initial setting signal I. Therefore, by adjusting this threshold level Th, it is possible to detect a dangerous state of fire occurrence or to detect a fire occurrence state. If any abnormality occurs in the fire detection unit 5 during the initial setting, an abnormality occurrence signal E, which will be described in detail later, is transmitted.

  Si2 is a step of confirming a response of the initial setting signal I, and Si3 is a step of confirming a timeout using the timer 24 when the response cannot be confirmed in the step Si2. The timer 24 is reset when, for example, the measurement is started from when the initial setting signal I is transmitted and the initial setting signal I responds. Therefore, the processing unit is configured to continue waiting for a response of the initial setting signal I from the time when the initial setting signal I is transmitted until the timer 24 times out.

  Si4 is executed when a timeout occurs in step Si3, and notifies the occurrence of an abnormality. This may be performed by a warning by an unillustrated alarm or a display by a warning lamp, but for example, by displaying a message such as “no response” on a display unit outside the figure or by outputting to a host computer, The occurrence state of the abnormality can be clarified.

  Si5 is executed when it is determined in step Si2 that there is a response, and it is determined whether the content of the response is a response to the initial setting signal I or an abnormality occurrence signal E. If it is determined that the signal is an abnormality occurrence signal E, the address information Ad (“005” in this example) is extracted from the abnormality signal E as shown in step Si6 and extracted as shown in step Si7. From the address information Ad, it is identified that an abnormality has occurred in the fire detection unit 5 (in this example, the (5 + 1) -th fire detection unit 5E from the most downstream unit in this example).

  Si8 is a step of notifying the occurrence of the abnormality. Even in this case, the notification of the occurrence of an abnormality may be performed by displaying an alarm or lamp, displaying a message such as “Occurrence of an error at the ○ th fire detection unit” on the display, or outputting an abnormal message to a host computer or other system. Good. The details of the method for specifying the source of the abnormality occurrence signal will be described later.

  Si9 is executed when the response of the initial setting signal I is confirmed in step Si5, and is a step for determining that the fire detection system 1 is normal.

  Si10 is a step of extracting address information Ad from the responding initial setting signal I.

Si11 is a step of registering the total number Nall of the fire detection units 5 included in the fire detection system 1 from the extracted address information Ad (10 in this example). That is, in this example, the initial setting unit 21 transmits an initial setting signal I that sets the address information Ad to “000” (in this case, the initial value A _{0 of the} address is 0), and each fire detection unit 5 Since the value Ad indicated by the address information is incremented (in this example, 1 is added as the predetermined value S), the value Ad indicated by the address information of the responding initial setting signal I is the total number of the fire detection units 5 as they are. Nall.

  That is, the fire detection system 1 of the present invention connects the fire detection unit 5 and the processing unit 6 in a ring shape by the communication line 7, and the processing unit 6 transmits only one initial setting signal I. It is possible to confirm how many fire detection units 5 are connected to each other. Various settings such as the threshold level Th can also be performed very efficiently.

However, the initial value A ₀ of the address information Ad may be a predetermined number other than 0, and the number S that each fire detection unit 5 sequentially adds to the value Ad indicated by the address information is also a number other than 1. Good.

Next, FIG. 6 is a diagram showing the operation of the operation confirmation program (operation confirmation unit) 23.
In FIG. 6, Sn1 indicates a step of transmitting the operation confirmation signal N. Here, for example, a series of character strings “N000000” as the operation confirmation signal N is transmitted to the communication line L. Then, the address information Ad of the operation confirmation signal N transmitted from the processing unit 6 is sequentially counted in each communication unit 10, and the operation confirmation signal N transmitted from the most downstream fire detection unit 5J to the processing unit 6 is “N010000”. "

  Sn2 is a step of confirming a response of the operation confirmation signal N, and Sn3 is a step of confirming a timeout using the timer 24 when the response cannot be confirmed in the step Sn2. In this case as well, the timer 24 is reset when, for example, the measurement is started from the transmission of the operation confirmation signal N and the operation confirmation signal N responds. Therefore, the timer 24 waits for the response of the operation confirmation signal N until the timer 24 times out. to continue.

  Sn4 is executed when a timeout occurs in step Sn3, and notifies the occurrence of an abnormality. This is the same as the operation of step Si4 in the case of the initial setting signal I.

  Sn5 is executed when it is determined in step Sn2 that there is a response, and it is determined whether the response is a response to the operation confirmation signal N or an abnormality occurrence signal E. If it is determined that the abnormality occurrence signal E, the address information Ad is extracted from the abnormality signal E as shown in step Sn6, and the fire detection that an abnormality has occurred from the extracted address information Ad as shown in step Sn7. Unit 5 is identified. Sn8 is a step of notifying the occurrence of the abnormality. These steps Sn5 to Sn8 are the same as the operations of steps Si5 to Si8 in the case of the initial setting signal I.

  Sn9 is executed when the response of the operation confirmation signal N is confirmed in step Sn5, and is a step for determining that the fire detection system 1 is normal. The address information Ad is extracted from the operation confirmation signal N responded here, and the total number of fire detection units 5 (10 in this example) currently included in the fire detection system 1 is obtained from the extracted address information Ad. May be compared with the total number Nall stored in the setting storage unit 22 to check the state of the fire detection system 1.

  Sn10 is a step for waiting for a predetermined time. Then, after waiting for a predetermined time T (for example, several seconds), the process returns to step Sn1, and an operation confirmation signal N is transmitted. That is, the fire detection system 1 according to the present embodiment transmits only one operation confirmation signal N at intervals determined here, and does not need to call all the fire detection units 5 individually. In addition, the operation of each communication line 7 can be confirmed.

  Next, the operation when the fire detection unit 5 detects a dangerous state of fire occurrence and / or a high temperature due to a fire will be described with reference to FIGS.

  Now, assuming that the temperature detected by the three temperature detection elements constituting the temperature sensor 3 in one fire detection unit 5F detects a temperature equal to or higher than the threshold level Th, for example, the detection signal transmitter 13 detects the detection signal. “F000003” is transmitted as F. That is, the detection signal F having “003” indicating the number of elements exceeding the threshold level Th, for example, is transmitted as the detection level. In addition, the detection signal transmission part 13 of fire detection unit 5A-5J transmits the detection signal F which has the same address information (for example, "000").

  The detection signal F is transmitted to the processing unit 6 through the fire detection units 5G to 5J. At this time, the address information is sequentially added one by one, so that the detection signal F received by the processing unit 6 is as shown in FIG. "F004003" as shown in FIG.

FIG. 7 is a diagram illustrating the operation of the transmission source identification program (transmission source identification unit) 25.
In FIG. 7, Sf1 is a step of receiving the detection signal F. When the processing unit 6 receives the signals I, N, F, and E (related to the steps Si2, Sn2, and Sf1), it is desirable that an interrupt process from the reception port 6r or the communication unit 20 is performed. In the present embodiment, however, detailed description thereof is omitted.

  Sf2 extracts address information Ad (“004” in this example) and data D (“003”) from the received detection signal F, and sets these values as position information Nx and fire level Lev, respectively. It is.

  Sf3 is a step of specifying a fire occurrence area, that is, a detection signal transmission source. In this embodiment, when each of the fire detection units 5A to 5J detects a fire, the detection signal F including “000” (meaning that the address value is 0) is all included as the same address information Ad. Each fire detection unit 5 (fire detection units 5G to 5J in this example) sequentially adds 1 as a specific value to the value indicated by the address information Ad. Therefore, in this embodiment, the position Nf of the transmission source of the detection signal F can be obtained by subtracting the extracted value Nx from the total number Nall of the fire detection units 5 in the fire detection system 1 in step Sf3.

The calculation for specifying the position Nf of the transmission source is performed using the initial value A ₀ of the address information Ad of the signal transmitted by the fire detection unit 5 and the predetermined number S. Accordingly, when the initial value A ₀ is other than 0, or when the predetermined number S is other than 1, in order to obtain the position Nf of the source of the detection signal F, Nall− (Nx−A ₀ ) / S can be calculated.

  Sf4 is a step of notifying the transmission source position Nf and the fire level Lev obtained in step Sf3 as fire detection information. This notification of fire detection information includes alarms and lamps, characters such as “○ th fire detection unit has detected a level x fire” on the display, and a map of each fire detection area prepared in advance. A fire detection message such as a diagram showing an area where a fire is detected may be displayed. Alternatively, the fire detection message may be output to a host computer or another system.

  Next, an operation when an abnormality occurs in the fire detection system 1 will be described. In the present embodiment, as an example, a case where an abnormality such as disconnection occurs in the communication line 7 connecting the fire detection unit 5D and the fire detection unit 5E will be considered.

  Each of the fire detection units 5 measures the interval at which the timer 14 receives the operation confirmation signal, and when this is longer than the predetermined interval T by an allowable time t (for example, several seconds), the abnormal signal generator 15 is downstream. An abnormal signal E is transmitted to the fire detection unit 5 or the processing unit 6 on the side. At this time, the abnormal signal E transmitted by the abnormal signal generator 15 is “E000000” in this example. That is, the abnormality signal generation unit 15 of each of the fire detection units 5A to 5J transmits the abnormality signal E including the same address information “000” to the downstream fire detection units 5B to 5J or the processing unit 6.

  Therefore, in the case of this example, the fire detection unit 5E transmits the abnormality signal E, and the processing unit 6 receives the abnormality signal E transmitted through the fire detection units 5F to 5J. At this time, since the abnormal signal E received by the processing unit 6 is “E00500” and the address information Ad is “005”, the transmission source identification program (transmission source identification unit) 25 transmits the transmission source of the abnormal signal E. In this example, it can be specified that it is the fifth fire detection unit 5E.

  Next, in the process of step Sf4, the occurrence of an abnormality is indicated by an alarm or a lamp, a character such as “O-th fire detection unit detected an abnormality” on the display section outside the figure, and each prepared fire An abnormality detection message such as a map of the detection area and a figure showing the position of the fire detection unit that detected the abnormality is displayed. Or you may output the said abnormality detection message to a high-order computer or another system.

  In addition, when the abnormal signal E is transmitted by the abnormal signal generation unit 15 in addition to the case where the operation confirmation signal N cannot be received, for example, the initial setting by the setting unit 11 cannot be performed, and the operation of each circuit is abnormal. You may make it transmit. Further, the type of abnormality may be transmitted as data D included in the abnormality signal E.

  As described above, in the fire detection system 1 according to the present embodiment, the source of the detection signal F and the abnormality signal E can be specified without setting any self-address in each fire detection unit 5. The configuration of the detection unit 5 can be simplified as much as possible. In addition, it is not necessary to set a self-address for each fire detection unit 5 at the time of installation, and the labor required for installation can be greatly reduced. In addition, even if an abnormality occurs in each fire detection unit 5, it is not necessary to set a self-address by simply replacing it with a new fire detection unit 5. Therefore, in the installation and replacement of the fire detection unit 5, there is no room for human setting errors, so that the reliability of the fire detection system 1 is improved.

  However, each fire detection unit 5 may be configured to automatically set its own address with the reception of the initial setting signal I and the operation confirmation signal N.

  FIG. 8 is a diagram showing an overall configuration of a fire detection system 1 ′ according to the second embodiment, and FIG. 9 is a diagram showing a configuration of a fire detection unit 5 ′ constituting the fire detection system 1 ′. 8 and 9, the parts denoted by the same reference numerals as those in FIGS. 1 to 7 are the same or equivalent parts, and thus detailed description thereof is omitted.

  The fire detection unit 5 ′ shown in FIG. 9 is different from the fire detection unit 5 of the first embodiment in that it includes an address storage unit 30 for storing its own address, and the communication unit 10 has an initial setting signal I and Only for the operation confirmation signal N, the setting unit 11 adds the predetermined value S (1 in this example) to the value Ad indicated by the address information included in these signals I and N, and the initial setting signal I. It is provided with an address automatic setting unit 11a for storing the value Ad indicated by the address information included in the signal I (N) in the address storage unit 30 when receiving the operation confirmation signal N. is there.

  Then, with the storage of the self-address, the allowable time t proportional to the value Af is set in the timer 14. The allowable time t is, for example, a time obtained by multiplying the value Af by several milliseconds. Thereby, the timer 14 can set the allowable time t according to the connection position of each fire detection unit 5.

Therefore, in the fire detection system 1 ′ of the second embodiment, the processing unit 6 includes “I000005” including address information “000” based on the initial value A ₁ (0 in this example) of the address as the initial setting signal I in the communication line L. ", The fire detection units 5A to 5J can automatically set their own addresses 000 to 009, respectively. Therefore, each of the fire detection units 5A to 5J can transmit the detection signal F including the address information based on the self address and the abnormality signal E, and the transmission source specifying unit of the processing unit 6 is included in these signals F and E. The source of these signals F and E can be easily specified from the address information.

In this example, the initial value A _{1 of the} address is set to 0, and the predetermined value S to be added to the value Ad indicated by the address information included in the signals I and N is set to 1, so that the signals F and E are transmitted. The source position is obtained by adding 1 to the value Ad indicated by the address information included in the signals F and E. However, when the value A ₁ is other than 0 or the value S is other than 1, the position of the transmission source can be obtained by (Ad−A ₁ ) / S + 1.

  In the fire detection system 1 ′ of the second embodiment, each fire detection unit 5 has a self-address, and this self-address connects each fire detection unit 5 </ b> A to 5 </ b> J and the processing unit 6 in a ring shape. 6 is automatically set only after the initial setting signal I (or the operation confirmation signal N) is transmitted. Therefore, since it is not necessary for the operator to set the self-address for the fire detection unit 5 at the time of installation, not only the trouble of installing or replacing the fire detection unit 5 is eliminated, and there is no concern about human error. The hardware configuration of the fire detection unit 5 can also be simplified.

  In each of the embodiments described above, an example is shown in which the temperature sensor 3 provided in the fire detection unit 5 detects (determines) the presence or absence of a fire from the measured temperature information by measuring the two-dimensional distribution of the surface temperature. However, the present invention is not limited to the type of the sensor 3, and it may be possible to detect a state where a fire may occur or a fire may be caused by a combination of a smoke sensor or a temperature sensor and a smoke sensor. Not too long. Moreover, since the sensor 3 outputs two-dimensional information and the fire detection unit 5 outputs this as the fire level Lev, the processing unit 6 can detect the spread state of the fire more accurately. The fire level Lev may be output based on the temperature, smoke concentration, or the like.

  In each of the above-described embodiments, the unit detection range by the single temperature sensor 3 is set to a range in which one vehicle 2 can detect, but the unit detection range by the single temperature sensor 3 is stored adjacently. You may set to the range which can be detected by several vehicles 2 made. Further, a plurality of temperature sensors 3 may be provided in one fire detection unit 5 to increase the detection range of one fire detection unit 5, that is, the number of automobiles that can be detected. In addition, the temperature sensor 3 may be configured to swing or slide so that the surface temperature of a plurality of automobiles can be measured by scanning or sliding the temperature sensor 3.

  Since the format of each of the signals I, N, F, and E is shown for easy explanation of the present invention, the present invention is not limited to the signal formats shown in the above-described embodiments. Not too long.

Further, although not described in the above embodiment, an automatic fire extinguishing device such as a sprinkler or a CO ₂ fire extinguishing device is provided on the basis of the fire detection signal. Of course.

FIG. 10 is a diagram showing a configuration of a fire detection system 40 of the third embodiment in which a plurality of fire detection systems 1 and 1 ′ shown in FIGS. 1 to 9 are connected.
10, 1A, 1B, 1C ... are the fire detection systems 1, 1 'described with reference to Figs. 1 to 9, and 6A, 6B, 6C ... are the processing units of each fire detection system 1A, 1B, 1C ... 6 (in the case of the present embodiment, since it is located between the host system and each fire detection unit 5, it is referred to as an intermediate processing unit in the following description). 41 is a communication cable for connecting the intermediate processing units 6A, 6B, 6C... By communication means such as a LAN, and 42 is connected to each of the intermediate processing units 6A, 6B, 6C. Host computer (processing unit for processing a signal from the fire detection unit 5).

  By connecting the fire detection units 5 in several groups as in this embodiment, when an abnormality such as a disconnection of the communication line 7 occurs, the portion that causes communication failure can be reduced. The reliability of the entire fire detection system 40 can be improved.

In the present embodiment, the communication cable 41 constituting the LAN is used. However, instead of signal communication using the communication cable 41, as described with reference to FIGS. An annular communication line L ′ is formed, and address information Ad as described in detail above is exchanged between the host computer 42 and each of the intermediate processing units 6A, 6B, 6C. You may be able to do it.

  In this embodiment, each of the intermediate processing units 6A, 6B, 6C... Is a value indicated by address information included in a signal received from the intermediate processing units 6A, 6B, 6C. The number Nall (or a larger number) of fire detection units 5 in each fire detection system 1A, 1B, 1C... Is added to Ad, and the intermediate processing units 6B, 6C. Send to computer 42.

It is a figure which shows the structure of the fire detection system which concerns on 1st Example of this invention. It is a figure which shows the structure of a part of said fire detection system. It is a figure which shows the structure of another part of the said fire detection system. It is a general view explaining operation | movement of the said fire detection system. It is a figure explaining the method of the initial setting in the said fire detection system. It is a figure explaining the method of the operation check in the said fire detection system. It is a figure explaining the transmission source identification method of the signal in the said fire detection system. It is a figure explaining operation | movement of the fire detection system which concerns on 2nd Example. It is a figure which shows the structure of a part of said fire detection system. It is a figure explaining the structure of the fire detection system which concerns on 3rd Example. It is a figure which shows an example of the conventional fire detection system.

Explanation of symbols

1, 1 ', 40 Fire detection system 3 Sensor 5 (5A-5J) Fire detection unit 5a Detection unit 5b Signal processing unit 5r, 6r Reception unit 5s, 6s Transmission unit 6 Processing unit 6A, 6B ... Intermediate processing unit 7 Communication line DESCRIPTION OF SYMBOLS 10 Communication part 11a Address automatic setting part 13 Detection signal transmission part 15 Abnormal signal transmission part 21 Initial setting part (initial setting program)
23 Operation check unit (operation program)
25 Source Identification Part (Source Identification Program)
Ad Value indicated by address information E Abnormal signal F Detection signal I Initial setting signal N Operation confirmation signal T Predetermined interval t Permissible time S Predetermined number

Claims (11)

Multiple fire detection units;
A processing unit for processing a signal from each fire detection unit;
A communication line that sequentially connects adjacent fire detection units and connects the processing unit so as to be adjacent to the most upstream fire detection unit and the most downstream fire detection unit of the signal;
Each fire detection unit
A sensor that detects the risk of fire and / or fire,
A detection signal transmitter for transmitting a detection signal including predetermined address information when this sensor detects a dangerous state of a fire and / or a fire;
It has a signal transmission / reception function with an adjacent fire detection unit or processing unit, and a predetermined number is added to the value indicated by the address information included in the signal received from the upstream fire detection unit or processing unit. A communication unit having a function of adding and transmitting to a fire detection unit or processing unit adjacent to the downstream side,
The processing unit includes a transmission source identification unit that identifies a transmission source of the signal using a value indicated by address information included in the signal received from the fire detection unit at the most downstream position and the predetermined number. A fire detection system. Multiple fire detection units;
A relay processing unit that communicates with each fire detection unit, communicates with the host system or other systems, displays, and operates;
A communication line that sequentially connects adjacent fire detection units and connects the processing unit so as to be adjacent to the most upstream fire detection unit and the most downstream fire detection unit of the signal;
Each fire detection unit
A detection unit that detects a dangerous state of a fire and / or detects a fire and transmits a detection signal including predetermined address information,
A receiving unit for receiving signals from other fire detection units or relay processing units;
A transmission unit that transmits each signal to another fire detection unit or relay processing unit;
A signal processing unit that outputs a detection signal from the detection unit to the transmission unit, and outputs a signal obtained by adding a predetermined numerical value to a value indicated by address information of the signal received by the reception unit to the transmission unit;
The processing unit includes a transmission source identification unit that identifies a transmission source of the signal using a value indicated by address information included in the signal received from the fire detection unit at the most downstream position and the predetermined number. A fire detection system. Multiple fire detection units;
A processing unit for processing a signal from each fire detection unit;
A communication line that sequentially connects adjacent fire detection units and connects the processing unit so as to be adjacent to the most upstream fire detection unit and the most downstream fire detection unit of the signal;
While the processing unit includes an initial setting unit that transmits an initial setting signal including address information based on the initial value of the address to the most upstream fire detection unit,
Each fire detection unit
A sensor that detects the risk of fire and / or fire,
It has a function of transmitting / receiving signals to / from the adjacent fire detection unit or the adjacent processing unit, and further, the value indicated by the address information included in the initial setting signal received from the upstream fire detection unit or processing unit A communication unit having a function of adding the number and transmitting it to the fire detection unit or processing unit adjacent to the downstream side;
An address automatic setting unit that sets as its own address using the value indicated by the address information included in the initial setting signal received from the fire detection unit or processing unit adjacent to the upstream side;
A detection signal transmitter for transmitting a detection signal including address information based on the address of the person when the sensor detects a dangerous state of fire occurrence and / or a fire;
The fire detection system further comprises a transmission source specifying unit that specifies a transmission source of the signal from a value indicated by address information included in the received signal.   The fire detection system according to claim 1, wherein the communication line is a serial communication line. Each of the fire detection units and the processing unit includes a reception port for connecting the upstream communication line and a transmission port for connecting a downstream communication line,
The reception port is connected to the upstream detection port or the transmission port of the processing unit adjacent to the upstream side via a communication line on the upstream side;
The fire detection system according to any one of claims 1 to 4, wherein the transmission port is connected to a fire detection unit adjacent to the downstream side or a reception port of a processing unit via a downstream communication line.   6. The process according to claim 1, wherein the processing section includes an operation confirmation section that periodically transmits an operation confirmation signal to the most upstream fire detection unit at predetermined intervals to confirm the operation of each fire detection unit. The fire detection system described in Crab.   Each of the fire detection units measures the time from the time when the operation confirmation signal is received to the time when the next operation confirmation signal is received, and when this time becomes longer than the predetermined interval by an allowable time or more, The fire detection system according to claim 6, further comprising an abnormality signal transmission unit that transmits an abnormality signal to the fire detection unit or processing unit on the side. A plurality of fire detection units, a processing unit for processing a signal from each fire detection unit, and an adjacent fire detection unit are sequentially connected and the processing unit is connected to the most upstream fire detection unit and the most downstream fire. In a fire detection system having a communication line connected so as to be adjacent to the detection unit,
Each fire detection unit
When a dangerous state of fire occurrence and / or a fire is detected, a detection signal including predetermined address information is sent to the fire detection unit or processing section adjacent to the downstream side,
When a signal is received from the fire detection unit or processing unit adjacent to the upstream side, a predetermined number is added to the value indicated by the address information included in this signal and transmitted to the fire detection unit or processing unit adjacent to the downstream side. ,
In the fire detection system, the processing unit specifies a source of the signal using a value indicated by address information included in the signal received from the fire detection unit at the most downstream position and the predetermined number. Control method. A plurality of fire detection units, a processing unit for processing a signal from each fire detection unit, and an adjacent fire detection unit are sequentially connected and the processing unit is connected to the most upstream fire detection unit and the most downstream fire. In a fire detection system having a communication line connected so as to be adjacent to the detection unit,
The processing unit sends an initial setting signal including address information based on the initial value of the address to the most upstream fire detection unit,
Each fire detection unit
When receiving the initial setting signal from the fire detection unit or processing unit adjacent to the upstream side, the initial setting of its own address is performed using the value indicated by the address information included in the received initial setting signal,
Add a predetermined number to the value indicated by the address information included in this initial setting signal and send it to the fire detection unit or processing unit adjacent to the downstream side,
When a dangerous state of fire occurrence and / or a fire is detected, a detection signal including address information based on the address of the fire is sent to a fire detection unit or a processing unit adjacent to the downstream side,
A control method for a fire detection system, wherein the processing unit specifies a transmission source of the signal from a value indicated by address information included in the received signal.   The processing unit periodically transmits an operation confirmation signal including predetermined address information to the fire detection unit at the most upstream position at predetermined intervals, and receives the operation confirmation signal from the fire detection unit at the most downstream position. The method for controlling a fire detection system according to claim 8 or 9, wherein operation of the fire detection unit is confirmed.   Each fire detection unit measures the time from the time when it receives the operation confirmation signal until the time when it receives the next operation confirmation signal, and when this time becomes longer than the predetermined interval by an allowable time or more, The control method of the fire detection system according to claim 10, wherein the signal is transmitted to a control method of the downstream fire detection system or a processing unit.

Images