JP2001134859A - System for automatically detecting installing position of fire sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system capable of automatically detecting the installing positions of respective fire sensors in a fire alarm system, for which plural fire sensors are used. SOLUTION: Sensors 30-36 are successively connected from a receiver 43 by wires L and C combined with power feeding path and communication path, each of sensors measures a voltage between the wires L and C to the present sensor and transmits it to the receiver 43, the receiver 43 arranges the voltage measured results from the respective sensors in the descending order corresponding to the level relation of voltage values, and first to seventh rooms of installing positions of respective plural sensors 30-36 are detected by identifier information A-G corresponding to these voltage measured results in the descending order.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system in which a plurality of fire detectors are sequentially connected from a receiver or a repeater by a pair of wiring paths which also serve as a power supply path and a communication path. The present invention relates to a system for automatically detecting an installation position.

[0002]

2. Description of the Related Art In a fire alarm system, for example, of a fire alarm system, a fire detector (hereinafter simply referred to as a fire detector means a fire detector) is provided at every point in a building or at a predetermined interval in a tunnel. And installed at a plurality of different installation locations. In addition, a plurality of types of sensors having different principles and methods for detecting a fire are used.

FIG. 7 is an explanatory view of a conventional general connection method when a plurality of sensors are installed.
7, 38, 39, and 40 are sensors with identifiers A, B, C, and D, and 42 is a receiver. According to FIG. 7, the conventional installation / installation in the case of installing a plurality of sensors in a fire alarm system
The connection method will be described. When installing a plurality of sensors in the fire alarm system, (1) First, for each of the plurality of sensors (for example, when installing a plurality of sensors of different types mixed together, Irrespective of this), a unique (unique) identifier (for example, an identification code composed of a plurality of bits) is set.

[0004] Each of the sensors is provided with identifier setting means such as a plurality of dip switches, for example. By using the setting means, a unique identifier is set for each sensor before installation. deep. In FIG. 7, when four sensors are installed, each of the four sensors 37, 38,
39 and 40 show examples in which unique identifiers of A, B, C and D are set, respectively.

(2) Next, a correspondence (arrangement correspondence) as to which detector is to be installed at which position (location) is determined. Now, as shown in FIG. 7, there are four rooms in the building from room 101 to room 104, and in rooms 101, 102, 103, and 104, sensors 37, 38, and 38 with identifiers A, B, C, and D respectively. Assume that it is decided to install 39 and 40. FIG. 7A shows an example in which the sensors for each room are correctly arranged as in the correspondence determined above.

[0006] (3) Next, the connection order of the plurality of sensors installed at each of the plurality of positions is determined. The conventional connection method is such that a pair of wirings L and C from a receiver 42 (or a repeater) are sequentially input and output to a first sensor and a second sensor as shown in FIG. Was connected. In FIG. 7A, the receiver 4
2 → The sensor 37 with the identifier A of the room 101 → the sensor 38 with the identifier B of the room 102 → the sensor 39 with the identifier C of the room 103 → the sensor 40 with the identifier D of the room 104 It is connected to the. Note that the pair of wirings L and C also serve as a power supply path and a communication path, and each sensor is connected to the receiver 42 via the pair of wirings L and C.
(For example, DC power supply), and communication with the receiver 42 (fire detection notification, etc.).

[0007] The correspondence between the connection order, the installation position, and the identifier of each sensor determined as described in (1) to (3) above is determined according to a correspondence table such as Table 1 or Table 2 below. Relay).

[0008]

[Table 1]

[0009]

[Table 2]

[0010] When mounting the sensors,
Reference is made to the correspondence table in Table 1 or Table 2, and the processing is performed according to this correspondence table. However, if the number of sensors to be installed increases, the following mistakes may occur during the mounting operation.

This is an error in the arrangement of each sensor identifier corresponding to each installation position in Table 1 or Table 2. FIG. 7B shows an example of a case where the corresponding arrangement is incorrect. In FIG. 7B, in the room 102, the sensor 38 of the identifier B should be originally arranged, In the room 104, the sensor 40 of the identifier B is erroneously arranged, while the sensor 40 of the identifier D is to be arranged. This error in the corresponding arrangement occurs relatively frequently and is often overlooked without being discovered after installation.

In the fire alarm system shown in FIG. 7, the location of the fire occurrence is specified by transmitting the identifier information of the own device to the receiver 42 together with the fire notification when each sensor issues a fire notification. It is to judge by. Now 102
Assuming that a fire has occurred in room No. 102, if the arrangement of detectors in each room is correct as shown in FIG. The occurrence can be correctly determined.

However, as shown in FIG. 7 (b), if the detector corresponding to room 102 is not properly arranged, a fire is generated in room 104 by the fire notification from the identifier D on the receiver side. You will incorrectly judge that you have done it. Therefore, an error in the correspondence between the installation position of the sensor and the identifier may cause a serious accident if overlooked, and is extremely dangerous.

[0014]

As described above, when a plurality of sensors are installed in a fire alarm system,
The installation position of each sensor is specified in advance by the correspondence table, but in the actual work of installation, wiring connection, inspection, adjustment, etc., the sensor is installed in the wrong installation position instead of the specified installation position May be done. In order to find the error, the inspector outputs the identifier information from the sensor at each installation position, and determines whether or not the output identifier information matches the identifier indicated in the correspondence table. Need to check. Therefore, when the number of sensors increases, there is a problem that much inspection time is required to check the sensors at each installation position. Therefore, there has been a demand for a sensor installation position automatic detection system that can automatically detect the installation positions of a plurality of sensors on the receiver side.

[0015]

An automatic fire detector installation position detecting system according to the present invention comprises:
In a system for automatically detecting the installation position of each fire detector in a fire alarm system in which a plurality of fire detectors are sequentially connected by a pair of wiring paths that also serve as a power supply path and a communication path, the fire detector Receives a voltage measurement command from the receiver or the repeater, measures a voltage between a pair of wiring paths connected to the own device, and compares the measured voltage information and own device identifier information with the receiver or the repeater. And a transmitter for transmitting the voltage measurement command between the pair of wiring paths connected to each of the plurality of fire sensors to each of the fire sensors. Then, the voltage information sequentially returned from each of the fire sensors is stored together with the corresponding identifier information, the voltage information is arranged in descending order according to the magnitude relation of the stored voltage information, and the identifier information corresponding to the descending voltage information is stored. By those having an information processing means and communication means for detecting a plurality of the installation position of the fire detector.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 2 is a functional configuration diagram of a fire detector according to Embodiment 1 of the present invention. In the first and second embodiments, the term “sensor” means a fire sensor. In FIG. 2, 1
Reference numeral 0 denotes a constant-voltage power supply for converting the power supplied from the sensor lines L and C into a constant voltage and supplying the constant voltage to its own sensor circuit. Reference numeral 11 denotes an interface unit that performs communication by power line using the sensor lines L and C. Reference numeral 12 denotes a sensor unit for detecting a fire and controlling the voltage measurement unit 13 and the interface unit 11. The sensor unit 12 includes a microcontroller and a sensor for detecting a surrounding environment state. Reference numeral 13 denotes a voltage measuring unit that measures a voltage between the sensor wirings L and C and sends a measured value to the sensor unit 12, and includes, for example, a voltage divider and an A / D converter.

FIG. 3 is a functional configuration diagram of the receiver according to the first embodiment of the present invention. In FIG. 3, reference numeral 20 denotes a power supply unit for supplying power to a plurality of sensors sequentially connected to the sensor lines L and C, respectively. 21 is a sensor wiring L,
An interface unit for performing communication by power line carrier using C, and a correspondence table storage unit 22 for storing a correspondence table between an installation position of a sensor and an identifier as shown in Table 5 described later.
In the correspondence table of Table 5, correspondence data by the sensor installation position automatic detection processing at the initial stage of system operation is stored, and thereafter, the stored data is corrected when a correction such as replacement of the sensor is required.

Here, as described in the prior art, the sensor identifier is a unique identification information for each sensor so that each sensor can be identified in one fire alarm system. This is data consisting of a plurality of bits set in advance. Reference numeral 23 denotes a measurement result storage unit for storing a correspondence table between the identifiers of the sensors and the power supply voltage measurement results as shown in Table 3 described later. Reference numeral 24 denotes control of the interface unit 21 and processing at the time of receiving a fire signal, processing of storing power supply voltage measurement results from each sensor in the measurement result storage unit 23, and power supply voltage measurement results once stored in the measurement result storage unit 23. This is a processing unit that performs detection processing of the sensor installation position by rearranging the data, storage processing of the correspondence data between the detected installation position of each sensor and the identifier in the correspondence table storage unit 22, and the like.

FIG. 1 is a diagram showing the connection between the receiver and each fire detector according to the first embodiment of the present invention. In FIG.
Numerals 30 to 36 denote the sensors of FIG. 2 having unique identifiers in one fire alarm system, and 43 denotes the receiver of FIG. In FIG. 1, as shown in Table 5, the connection order of the receiver 43 → the first room → the second room → the third room → the fourth room → the fifth room → the sixth room → the seventh room by a pair of wirings L and C from the receiver 43. Wiring is done correctly in order. But,
The arrangement of the sensors in each room is A, B, C, D, E, ...
Are shown in the case where they are not arranged correctly in the order of.

The automatic detection process of the sensor installation position according to the first embodiment in the case where the arrangement of the sensors is incorrect as shown in FIG. 1 will be described with reference to FIGS. (1) First, the processing unit 24 of the receiver 43 issues a command to control the interface unit 21 to perform power supply voltage measurement by one.
Transmit to one specified sensor. The designation of the sensor is performed using an identifier set for each sensor. (2) The transmitted command reaches the sensor specified by the identifier via the sensor wirings L and C. (3) The power supply voltage measurement command reaching the sensor with the specified identifier is transmitted to the sensor unit 12 via the interface unit 11. This voltage measurement command causes the sensor unit 1
2 causes the voltage measurement unit 13 to measure a power supply voltage (for example, a DC voltage) input via the sensor lines L and C. The voltage measuring unit 13 divides the input power supply voltage by a voltage divider,
Quantized voltage data is obtained as a result of A / D conversion of the divided voltage value. Then, the voltage data is transferred to the sensor unit 12.
Pass to. The sensor unit 12 returns the voltage data to the receiver 43 via the interface unit 11 together with the identifier data of the sensor unit.

(4) The identifier data and voltage data of the sensor transmitted from the sensor reach the receiver 43 via the sensor lines L and C. (5) The identifier data and the voltage data that have reached the receiver 43 are transmitted to the processing unit 24 via the interface unit 21. The processing unit 24 associates the transmitted measurement result (power supply voltage data) with the identifier of the sensor and stores it in the measurement result storage unit 23. (6) The receiver 43 individually performs the processes (1) to (5) for all the sensors registered in the correspondence table storage unit 22. (7) When the power supply voltage measurement has been completed for all the sensors, the measurement result in the measurement result storage unit 23 by the processing unit 24 is, for example, as shown in Table 3 below.

[0022]

[Table 3]

In Table 3, identifiers A, B, C,.
Supply voltage measurement result of the sensor, respectively V _a,
V _b, shows that V _c, a ... V _g.

In the connection configuration of FIG.
The power supply voltage measurement value of the sensor whose connection order is
V₁The measured value of the power supply voltage of the second sensor is V_TwoFirst
The conductor resistance of the wirings L and C between the second sensor and R is R,
The power flowing through the lines L and C due to the power consumption of each sensor
If the current is I, then V_Two= V₁−IR₁>
V _TwoHolds. Similarly, the connection order from the receiver 43 is
The power supply of each of the first, second, third,.
Pressure measurement value is V₁, V_Two, V_Three, ... V_nThen
(1) is established. V₁> V_Two> V_Three>…> V_n ... (1) The voltage measurement unit 13 in the sensor measures the voltage with high accuracy
Can determine the magnitude relationship between the measured voltage values
It is possible to do.

Therefore, the power supply voltage measurement results V _a ,
When V _b , V _c ,..., V _g are rearranged in descending order from a large value to a small value, in the case of the sensor arrangement of FIG. 1, the following equation (2) is obtained. The _{V a> V d> V e} > V f> V g> V c> V b ··· (2) the formula (2), the connection order of the sensor identifier and the power supply voltage measurement result correspondence table follows Table 4 below.

[0026]

[Table 4]

Since the actual sensors are arranged according to the connection order in Table 4, the processing unit 2 of the receiver 43
4 creates a data correspondence table to be stored in the correspondence table storage unit 22 as shown in Table 5 based on Table 4.

[0028]

[Table 5]

In this manner, the receiver 43 can automatically detect the installation position of each sensor.

As described above, according to the first embodiment, the installation positions of a plurality of sensors can be automatically detected on the receiver side. This eliminates the need for inspection personnel to individually check the sensor identifiers at each location.

Second Embodiment In the second embodiment, the sensor wirings L and C in the first embodiment are used.
Is short, the conductor resistance is small, and the voltage drop in the sensor lines L and C is small, the input and output terminals of the line L connected to the sensor are connected only during the power supply voltage measurement period. A resistor is inserted between the detectors to increase the difference in power supply voltage between the sensors, thereby facilitating the determination of the magnitude relationship between the measured voltage values. Then, during a normal operation period excluding the power supply voltage measurement period, the inserted resistor is short-circuited by a circuit switch to prevent a voltage drop in the resistor.

FIG. 5 is a functional configuration diagram of the fire detector according to the second embodiment of the present invention. FIG. 5 shows a configuration in which a resistor 44 and a switch unit 45 are added to the sensor of FIG.
Are separately connected to the input side wiring L and the output side wiring L ′. In FIG. 5, reference numeral 44 denotes a resistor for voltage drop. Reference numeral 45 denotes a switch connected in parallel with the resistor 44 for enabling or disabling the resistor 44 between L and L '. Whether the switch of the switch 44 is open or closed Is controlled by the sensor unit 12 based on the opening / closing control command from the receiver 43. During a normal operation period excluding the power supply voltage measurement period, the switch of the switch unit 45 is closed and a short circuit occurs between L and L ', so that no voltage drop occurs. Then, when the switch of the switch section 45 is opened, the connection between L and L 'is made by only the resistor 44, and a voltage drop occurs. The sensor shown in FIG. 5 enables the resistor for voltage drop only during the period in which the power supply voltage is measured, and prevents the adverse effect of the voltage drop of the resistor 44 from occurring during normal operation.

FIG. 6 is an explanatory diagram of a method of separating and connecting the wirings L and L 'of the fire detector of FIG. In FIG. 6, an input side wiring L and an output side wiring L 'to each of the sensors 30, 31, 32 are shown.
Are separately connected to an input terminal and an output terminal, respectively.

FIG. 4 is a diagram showing a connection between the receiver and each fire detector according to the second embodiment of the present invention. In the second embodiment of FIG. 4, before and after the process of automatically detecting the sensor installation position in the first embodiment, a process of enabling and disabling the resistor 44 is added. That is, the receiver 43 first activates the resistor 44 inserted between the wirings L and L 'of all the sensors, and performs the power supply voltage measurement processing for each sensor. Then, after measuring the power supply voltages of all the sensors, the resistors 44 of all the sensors may be disabled.

In the second embodiment, each sensor is
As shown in FIG. 5, a pair of wires L,
The resistor 44 and the switch unit 4 are connected between the input terminal and the output terminal of one of the wirings L of C (when the power supply is a DC power supply, the positive voltage side wiring).
5 is inserted, the resistor 44 and the switch unit 45 may be individually inserted between the input terminal and the output terminal of each line of the pair of lines L and C connected to the own device. Good.

As described above, according to the second embodiment, since a larger voltage drop is generated by inserting a resistor into each sensor wiring, the difference between the measured voltages of the respective sensors increases, and The installation position of the vessel can be detected more reliably. Further, the enabling and disabling of the resistor inserted into the wiring for the voltage drop is controlled on the receiver side, and the installation position based on the measured voltage can be reliably detected, and during normal operation, the influence of the voltage drop is eliminated. Therefore, a sensor configuration similar to that of the conventional system can be obtained.

In the first and second embodiments, the detector has been described as a fire detector, but the present invention is not limited to this. That is, when the sensor is a disaster prevention sensor, for example, an earthquake vibration sensor, an acceleration sensor, a river water level gauge, a current meter, a rain gauge, an anemometer, and the like can be handled in the same manner as the fire sensor. Therefore, when a plurality of the same or different disaster prevention sensors are installed, the present invention can be applied as an automatic detection system for the installation positions of these disaster prevention sensors.

[0038]

As described above, according to the present invention, a fire alarm system in which a plurality of fire detectors are sequentially connected from a receiver or a repeater by a pair of wiring paths which also serve as a power supply path and a communication path. In the system for automatically detecting the installation position of each fire sensor in, each fire sensor receives a voltage measurement command from the receiver or the repeater, between a pair of wiring paths connected to its own It has a voltage measuring means and a communication means for measuring a voltage and transmitting the measured voltage information and own equipment identifier information to the receiver or the repeater, and the receiver or the repeater is provided with the plurality of fire detectors. A voltage measurement command between the pair of wiring paths connected to each other is sequentially transmitted to each fire sensor, and voltage information sequentially returned from each of the fire sensors is stored together with corresponding identifier information, and these stored voltages are stored. Information size The voltage information is arranged in descending order, and the information processing means and the communication means for detecting the installation positions of the plurality of fire detectors based on the identifier information corresponding to the voltage information in descending order are provided. When installing multiple fire detectors, the receiver can automatically detect the installation position of each of the multiple fire detectors, so that misplacement of fire detectors can be overlooked as in the past. This eliminates the need for inspectors to individually check the fire detector identifiers at each installation location.

[Brief description of the drawings]

FIG. 1 is a diagram showing a connection between a receiver and each fire detector according to a first embodiment of the present invention.

FIG. 2 is a functional configuration diagram of the fire detector according to the first embodiment of the present invention.

FIG. 3 is a functional configuration diagram of a receiver according to the first embodiment of the present invention.

FIG. 4 is a diagram showing connection between a receiver and each fire detector according to Embodiment 2 of the present invention.

FIG. 5 is a functional configuration diagram of a fire detector according to Embodiment 2 of the present invention.

FIG. 6 is an explanatory diagram of a method of separating and connecting wires L and L ′ of the fire detector of FIG. 5;

FIG. 7 is an explanatory diagram of a conventional general connection method when a plurality of sensors are installed.

[Explanation of symbols]

 Reference Signs List 10 constant voltage power supply unit 11 interface unit 12 sensor unit 13 voltage measurement unit 20 power supply unit 21 interface unit 22 correspondence table storage unit 23 measurement result storage unit 24 processing unit 30-40 sensor 42,43 receiver 44 resistor 45 switch Department

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5C087 BB07 BB35 BB63 BB74 DD04 EE08 EE12 FF01 FF03 GG12 GG18 GG19 GG54 GG66 GG79 GG84 5G405 AA06 BA03 CA30 CA55 DA11

Claims (3)

[Claims] 1. A fire alarm system in which a plurality of fire detectors are sequentially connected from a receiver or a repeater by a pair of wiring paths which also serve as a power supply path and a communication path. In each system, the fire detector receives a voltage measurement command from the receiver or the repeater, measures a voltage between a pair of wiring paths connected to the fire detector, and measures the measured voltage information. And a voltage measuring means and a communication means for transmitting self-identifier information to the receiver or the repeater, wherein the receiver or the repeater is between the pair of wiring paths connected to the plurality of fire detectors. Are sequentially transmitted to each of the fire sensors, and the voltage information sequentially returned from each of the fire sensors is stored together with the corresponding identifier information, and the voltage information is sorted in descending order according to the magnitude relation of the stored voltage information. Line up, Fire detector installation position automatic detection system characterized by having an information processing means and communication means by identifier information corresponding to the decreasing order of voltage information detecting multiple installation positions of the respective fire detectors. 2. The fire detector according to claim 1, wherein each of the fire detectors includes a resistor individually inserted between an input end and an output end of a pair of wires connected to the fire detector, or one of the pair of wires. 2. The automatic fire detector installation position detecting system according to claim 1, further comprising a resistor inserted between an input terminal and an output terminal of the wiring. 3. Each of the fire sensors is individually connected between an input terminal and an output terminal of each of a pair of wires connected to the fire detector, or an input terminal and an output of any one of the pair of wires. A circuit switch connected in parallel to each resistor inserted between the ends, and a switching command of the circuit switch is received from the receiver or the repeater, and the circuit switch is received by the received switching command. The system for automatically detecting the installation position of a fire detector according to claim 2, further comprising control means for controlling and communication means.