JPS63158689A - Automatic fire alarm - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] 【Technical field】

The present invention relates to an automatic fire alarm system that detects smoke or heat using a sensor attached to a ceiling or the like in a room, and transmits the detection signal to a receiver to notify of a fire.

[Background technology]

In conventional automatic fire alarm systems, multiple types of detectors, such as ionization smoke detectors, photoelectric smoke detectors, and heat detectors, are connected to a signal line for open analog signals to a receiver. In some cases, since the output level at the time of fire detection differs depending on the model of each sensor, it is necessary to inform the receiver of information about the model of each sensor in advance. For this reason, in conventional automatic fire alarm systems, a negative connection terminal is provided between the sensor head and the transmission base to output an analog signal for model identification, and this terminal voltage is changed depending on the sensor model. A method of identifying the model was adopted. In other words, as terminals for the sensor, in addition to the 10 terminal and 1 terminal for power supply, a terminal for outputting an analog detection signal from the sensor and a negative connection terminal for model identification are required. requires a terminal for outputting a detection signal and a negative connection terminal for WaW & other, and correspondingly, multiple open signal lines between the sensor and the receiver are required. It is also conceivable to store the model of each sensor together with the address of each sensor in the receiver. However, in this way, the receiver has 8 sensors in advance! If the type is entered and stored, the data stored in the receiver must be changed each time a sensor is added or a sensor is replaced with a different model. , it was a hassle. Next, it is necessary to perform appropriate tests to see if the automatic fire alarm system operates without errors, but with conventional automatic fire alarm systems, operation tests are only performed up to the receiver installed on the main control panel or repeater. I couldn't do it. In other words,
No operational tests were performed between the sensor and receiver.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned technical background, and its purpose is to facilitate the @ type setting and operation confirmation of a sensor, and to reduce the number of signal lines. The aim is to make it possible to reduce

[Disclosure of the invention]

The automatic fire alarm system of the present invention connects the sensor 1 and the receiver 2 through a signal port MA3 for analog signal transmission, and transmits the analog detection signal output from the sensor 1 from the sensor 1 to the receiver 8!2. In an automatic fire alarm system that is capable of transmitting fire alarms, a signal at a certain level for identification of the species of the sensor 1 or operation confirmation is received from the sensor 1 through the signal port #I3 instead of the detection signal when the power is turned on. This is characterized in that it is configured to output to the machine 2. Thus, when the power is turned on, a signal of a certain level is sent from the sensor 1 to the receiver 2 instead of the detection signal of the sensor 1, thereby making it possible to set the model of the sensor and check the operation of the sensor. That is, the signal port MA3 for transmitting the detection signal is used by transmitting a type signal whose level varies depending on the model of the sensor 1 from the analog signal signal port #it3 to the receiver 8112 as a constant level signal when the power is turned on. The signal for setting the model of the sensor 1 can be transmitted to the receiver 2, and the signal line 3 for analog signals can be transmitted to the receiver 2.
In addition to being able to reduce the number of sensors, it is also possible to easily cope with the addition of the sensor 1 or changing the model. Also,
By outputting a signal at the same level as the detection signal at the time of fire detection as a signal at a certain level when the power is turned on from the sensor 1, the signal line 3 is used to detect a fire between the receiver 2 and the sensor 1. It is also possible to perform a test, or use a signal at a certain level as a signal at the same level as the detection signal output by sensor 1 when the forecast, fire detection, and smoke prevention interlock is activated. By sequentially outputting the signals, it is possible to test the operation of the automatic fire alarm system using signal port #13. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 2 shows an automatic fire alarm system. The reception fi2 is installed on the main body control panel or repeater, and includes multiple ionization sensors, optical sensors, heat sensors, etc. Seed sensor 1 and receiver 2 are connected by signal port #1t3 (multiplex transmission line) for analog signal transmission, and time division multiplex transmission is used between receiver 2 and each sensor 1. It is now possible to transmit analog signals. On the other hand, as shown in Fig. 1, the sensor 1 has a detection signal output section 4 that detects smoke or heat at the installation location and outputs the detection signal as an electrical analog signal, and a detection signal output section 4 that detects smoke or heat at the installation location and outputs the detection signal as an electrical analog signal. When the power is turned on or when the signal #i
13 is restored and the power is turned on (re-turned on) from the off state, the power supply start-up detection section 5 detects the rise of voltage, and the timer section 6 differs depending on the model of the sensor 1 and is fixed depending on the model. and a characteristic signal output section 7 which outputs a signal at a certain level (hereinafter referred to as a type signal). When the power is turned on from the off state and the power is turned on, the power rise detection section 5 of the sensor 1 detects this, starts the timer 81S6, and drives the characteristic signal output section 7 to output a characteristic signal. The type signal is output from the section 7. Since the started timer part 6 outputs an H signal, an L signal is output from the AND date 8, and the detection signal of the detection signal output section 4 cannot pass through the AND date 8. Therefore, the output from the OR date 9 Then, the type signal outputted from the characteristic signal detection section 7 is in a state where it can be outputted to the signal line 3 as the output of the sensor 1. On the other hand, signals are transmitted from the receiver Miso 2 to the signal line 83 in the order of start signal → address signal - control signal, and the output signal of the sensor 1 specified by the address signal from the receiver 2 is transmitted to the signal line 3. The receiver 2 then becomes able to access the analog type signal output from the sensor 1, and determines and stores the type of sensor 1 specified by the address signal. In this way, a plurality of sensors 1 are accessed one after another, and the type of sensor 1 is input and stored in the receiver ff1fi2. The timer setting time of the timer 8'lS6 of the sensor 1 is the time required for all the sensors 1 to be accessed as described above, and when this timer setting time elapses, the timer part 6 stops. At the same time, it outputs an L signal and becomes a characteristic signal output section 71iL, and the detection signal from the detection signal output section 4 is output from the AND data) 8 and 0Rf-to 9. Shifting to a monitoring state, the receiver 2 judges the detection signal according to the model of each sensor 1 and judges whether there is a fire or not. In order to set the model of the sensor 1, it is sufficient to turn on the power after performing image processing such as line restoration, and the power may be turned off by changing the voltage. In addition, although not shown, during the time when the timer part 6 is driven after the power is turned on, the characteristic signal output 97 is at the same constant level as the detection signal output when the sensor 1 detects a fire when a fire occurs. By outputting a signal of It is something that can increase the Furthermore, as shown in Figure 14, when the power is turned on, the timer part 6
Forecast level, fire detection level, and smoke prevention interlocking level signals at the same level as the detection signal output during sensor forecast, fire detection, and smoke exhaust prevention interlocking operation during a certain period of time during which the sensor is being driven. It is possible to output the signal to the signal R3. Here, the forecast operation is to output a forecast signal and add one warning when the sensor 1 detects an abnormality but it has not yet been determined, and the fire detection operation is to add one warning when it is determined that a fire has occurred. It outputs an output signal at the same time to issue a fire alarm, etc. Furthermore, the smoke prevention and smoke exhaust interlocking operation is to close the fire shutter or drive the smoke exhaust equipment in conjunction with the detection signal. The reliability of the automatic fire alarm system can be improved by conducting an operation test when the power is turned on to determine whether or not the device 1 can perform a predetermined operation without malfunction when it detects a fire. In this case, each sensor 1 needs to be accessed by the receiver 2 for many cycles within the set driving time during which the timer part 6 is activated.

【Effect of the invention】

Since the present invention is configured as described above, when the power is turned on, instead of the detection signal of the sensor, a signal of a certain level is sent from the sensor to the receiver, thereby making it possible to set the sensor model and check the operation of the sensor. It is something. In other words, by transmitting different types of signals with different levels depending on the sensor model from the analog signal line to the receiver as a constant level signal when the power is turned on, the sensor can be detected using the signal line that sends the detection signal. Receive signal to set model
This makes it possible to reduce the number of uplink signal lines used for analog signals, and it also makes it easy to add sensors or change models. In addition, by outputting a signal at the same level as the detection signal at the time of fire detection from the detector as a constant level signal when the power is turned on, a fire test between the receiver and the detector can be performed using the signal line. Alternatively, the same level as the detection signal output when the sensor's forecast, fire detection, and smoke exhaust prevention interlocking operation is performed as a fixed level signal, the same level of forecast level, fire detection level, and smoke prevention interlocking level signal can be sequentially output. By doing so, it is possible to test the operation of the automatic fire alarm system using the signal line.

[Brief explanation of the drawing]

FIG. 151 is a block diagram of a sensor according to an embodiment of the present invention, FIG. 2 is a schematic configuration diagram of the automatic fire alarm system shown above, FIG. 3 is a waveform diagram showing the output from the same sensor, and FIG. 4 is a waveform diagram showing the output of the sensor on the other side of the present invention. 1...sensor, 2...receiver, 3...signal line. Agent Patent Attorney Mr. Ishi 1) Figure 7 Figure 1 Figure 3

Claims (4)

[Claims] (1) In an automatic fire alarm system in which a sensor and a receiver are connected by a signal line for analog signal transmission so that an analog detection signal output from the sensor can be transmitted from the sensor to the receiver, the sensor An automatic fire alarm system characterized in that a signal of a certain level for model identification or operation confirmation is outputted from a sensor to a receiver via the signal line instead of the detection signal when the power is turned on. (2) Multiple types of sensors and receivers are connected via a common signal line for analog signal transmission, and the analog detection signals output from each sensor are transmitted from each sensor to the receiver using a time division multiplex transmission method. In an automatic fire alarm system capable of transmitting a fire alarm, when the power is turned on, a signal at a certain level for model identification according to the model of each sensor is sent from each sensor to a receiver via the signal line instead of the detection signal. The automatic fire alarm device according to claim 1, characterized in that it is configured to output an output. (3) A patent characterized in that a signal of the same level as the detection signal outputted by the sensor when detecting a fire is output from the sensor to the receiver via the signal line instead of the detection signal when the power is turned on. An automatic fire alarm device according to claim 1. (4) When the power is turned on, a signal of a forecast level, a fire detection level, and a smoke prevention interlock level that is the same as the detection signal output during the sensor's forecast, fire detection, and smoke prevention interlock operation is used instead of the above detection signal. The automatic fire alarm system according to claim 1, characterized in that the signal is output from the sensor to the receiver via a signal line.