JP3196045B2 - Fire monitoring system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire monitoring system, and more particularly to a fire monitoring system, in which a plurality of analog sensors are connected to a pair of signal lines, and a detection signal detected by a detection unit of each analog sensor is signaled. The present invention relates to a fire monitoring system capable of detecting the occurrence of a fire by transmitting the detection signal to a line and decoding the detection signal with a fire receiver.

[0002]

2. Description of the Related Art Conventionally, in this type of system, the type of an analog sensor is fetched from a receiver at power-on or at a fixed period, and the receiver receives the analog sensor according to the type of the analog sensor. Is determined based on the detection signal from the detector according to the type signal of the detector, thereby making it possible to determine the fire for each detector type.

However, according to the above-described conventional method, when an analog sensor of the wrong type is attached, unlike the design, the equipment drawing and the type of the attached analog sensor are all visually confirmed. It is necessary to manage the installation location of the analog sensor, the address and the type of the analog sensor, and a great deal of work is required.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned disadvantages of the prior art, and increases the number of analog sensors connected to a fire receiver and the types of analog sensors to constitute a fire monitoring system. Another object of the present invention is to provide a fire monitoring system capable of smoothly carrying out disaster prevention equipment construction.

[0005]

According to the first aspect of the present invention, there is provided a fire monitoring system connected to a fire receiver via a signal line. Combined with a plurality of analog sensors having a detection unit for detecting smoke, temperature, etc., which are fire phenomena, each of the analog sensors responding to an address call and a mode signal from the fire receiver, A fire monitoring system configured to return a detection signal based on the analog output of each detection unit while the fire receiver is configured to make a fire determination based on the detection signal returned from each of the analog sensors. In particular, the fire receiver has a sensor registration table in which the types of the sensors are registered in correspondence with the addresses of the respective analog sensors. Each of the detectors has a sensor type information transmitting unit that generates sensor type data set according to the type of the detecting unit of each sensor, and an address signal transmitted when an address is called from the fire receiver. When it matches its own unique address or when it matches the mode signal,
A transmission / reception unit is provided for transmitting the detection signal and the sensor type signal simultaneously, or separately and independently transmitting the detection signal and the sensor type information to the signal line.

The present invention proposed in claim 2 has a configuration in which a fire detector reference table is registered in addition to fire detector type information in association with fire detector reference information in association with a detector address.

[0007]

According to the fire monitoring system of the first aspect of the present invention, the fire receiver is provided with a registration table in which the type of the sensor corresponding to the monitoring system to be constructed is registered in association with the address. Therefore, by checking the sensor type information returned from the sensor, the fire receiver can quickly detect an installation error at the site when installing or replacing the sensor.

Further, according to the system of the present invention proposed in claim 2, even if the types of analog sensors constituting the fire monitoring system are the same, the fire determination standard can be changed and set according to the address. Optimal fire judgment according to the site can be made quickly.

[0009]

An embodiment of the present invention will be described below. FIG.
FIG. 1 is a block diagram showing the overall configuration of a fire monitor system according to the present invention. A plurality of analog sensors 1 are connected to a fire receiver 3 via a signal line 2 and a sensor registration table 3
1 in response to an address call from the fire receiver 3 provided with 1, and returns a reply signal.

FIG. 2 is a block diagram showing an embodiment of an analog sensor used in the fire monitoring system of the present invention. The sensor 1 includes a detection unit 4 that detects smoke, heat, and the like of a fire phenomenon. The detection unit 4 is, for example, a photoelectric densitometer, a temperature sensor, or the like, and outputs an analog output indicating a detection level such as smoke density and temperature. A / D converter 5
Is to quantize the output of the detection unit 4 and convert it to a digital signal.
The present invention is not limited to the / D converter 5.

The transmission / reception section 7 receives the address signal and the mode signal transmitted from the fire receiver 3 to the signal line 2 and, when the unique address assigned to the transmission / reception section 3 matches, the sensor type information in accordance with the mode signal. The type information signal is output from the sending unit 6, and the signal output from the detecting unit 4 is
The signal is converted into a digital signal by the D converter 5 and transmitted to the signal line 2. One end of the signal line 2 is connected to the fire receiver 3.

FIG. 3 shows a fire receiver 3 and an analog sensor 1
2 shows an example of communication data transmitted between the communication device and the communication device. Following the start bit ST, the communication data includes address data AD, mode signal data MD, control data CD, error check code EC, and return data RD.
The mode signal data MD designates an analog signal (current value) + type request, type only request, sensor control, and the like. The control data CD is valid at the time of the sensor control command and serves as control data for various tests or sensor recovery, and the return data RD is data returned in response to the polling call of the fire receiver 3. It corresponds to.

According to such a fire monitoring system, the fire receiver 3 obtains smoke density, temperature, and the like based on a return signal from the analog sensor 1 to determine a fire and perform display processing or the like. The normal installation location and address of the sensor 1 are determined, and an alarm is generated when an abnormality is determined. The fire receiver 3 includes a sensor registration table 31,
In this table 31, the type of the sensor 1 and fire judgment information (for example, information for judging a detection signal as a fire) corresponding to the sensor 1 are associated with an address assigned to the sensor 1. Has been written. Therefore, according to such a fire monitoring system, by changing the contents of the sensor registration table 31, different judgment criteria can be set even if the type of the analog sensor 1 is the same. Fine-grained settings can be made.
Further, in the present embodiment, the communication data transmitted between the signal line 2 connecting the fire detector 3 and the analog sensor 1 is described as above, but the communication data is limited to a specific transmission signal / format. Needless to say, it can be implemented without any change.

[0014]

As described above, according to the fire monitoring system of the present invention proposed in claim 1, the type information of the analog sensor is made to correspond to the address of the sensor according to the monitoring system to be designed. The fire detector has a sensor registration table that has been registered in the fire detector. Therefore, the information on the sensor returned from the analog sensor can be used to set up the disaster prevention equipment when the sensor is installed or replaced. This has the effect of enabling early detection of an analog sensor processing error).

According to the present invention, the data in the analog sensor registration table provided inside the fire receiver is rewritten each time the system configuration of the fire monitoring system is different. Since fire criteria can be changed arbitrarily even with the same type of sensor,
Detailed operation settings according to the site can also be made.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of a fire monitoring system of the present invention.

FIG. 2 is a block diagram showing one embodiment of an analog sensor used in the system of the present invention.

FIG. 3 is a diagram showing a format of communication data transmitted between a fire receiver and an analog sensor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Analog sensor 2 ... Signal line 3 ... Fire receiver 31 ... Sensor registration table 4 ... Detector 5 ... A / D converter 6 ... Sensor type Information transmission unit 7: Transmission / reception unit ST: Start bit AD: Address data MD: Mode signal data CD: Control data EC: Error check code RD: Return data

Claims (2)

(57) [Claims] 1. A combination of a fire receiver and a plurality of analog sensors connected to the fire receiver via a signal line and having a detection unit for detecting smoke, temperature, and the like as a fire phenomenon. In response to the address call and the mode signal from the fire receiver, the analog detector returns a detection signal based on the analog output of each detection unit, while the fire receiver returns from each of the analog detectors. In a fire monitoring system configured to judge a fire based on a returned detection signal, the fire receiver is configured to register a sensor type in which a type of the sensor is registered in correspondence with an address of each of the analog sensors. A table for transmitting sensor type information for generating sensor type data set according to the type of the detection unit of each sensor. And when the address signal transmitted at the time of address calling from the fire receiver matches its own unique address or matches the mode signal, the detection signal and the sensor type signal are simultaneously output or the detection signal is output. And a transmitter / receiver for separately and independently transmitting the sensor type information to the signal line. 2. The fire monitoring system according to claim 1, wherein the sensor registration table registers, in addition to the sensor type information, fire discrimination reference information in association with the address of the sensor.