JPS59187894U

JPS59187894U - Gas leak detection system repeater

Info

Publication number: JPS59187894U
Application number: JP8234883U
Authority: JP
Inventors: 宮崎　政範
Original assignee: 松下電工株式会社
Priority date: 1983-05-31
Filing date: 1983-05-31
Publication date: 1984-12-13

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来例のシステムのブロック図、第２図は本考
案の実施例の具体回路図、第３図は同上のシステムのブ
ロック図そあり、Ａは中継器、Ｂは受信機、ＴｒＯは出
力用のトランジスタ、Ｄ、〜Ｄ１ｏはダイオード、Ｇｌ
ｏ、　Ｇ１□〜Ｇ３ｏ、　Ｇ３１は信号入力端子、ＺＤ
ｌはツェナーダイオード、Ｇ１は増設接続端子、ＧＯは
出力端子、Ｇｃは共通接続端子、Ｔｒｌ、　−Ｔｒ２．
　Ｔｒ３ハ）　５　：／ジスタ、ＳＷは空室対策用スイ
ッチ、１１〜１３はガス漏れ検知器、２は優先判別回路
、３はトラブル検知回路、４はガス漏れ検知回路、５は
第１の定電圧回路、６は第２の定電圧回路、７は補正回
路、８は判別回路である。Fig. 1 is a block diagram of a conventional system, Fig. 2 is a specific circuit diagram of an embodiment of the present invention, and Fig. 3 is a block diagram of the same system. A is a repeater, B is a receiver, and TrO is an output transistor, D, ~D1o is a diode, Gl
o, G1□~G3o, G31 is the signal input terminal, ZD
l is a Zener diode, G1 is an expansion connection terminal, GO is an output terminal, Gc is a common connection terminal, Trl, -Tr2.
Tr3c) 5: / register, SW is a switch for vacancy control, 11 to 13 are gas leak detectors, 2 is a priority discrimination circuit, 3 is a trouble detection circuit, 4 is a gas leak detection circuit, 5 is a first constant A voltage circuit, 6 a second constant voltage circuit, 7 a correction circuit, and 8 a discrimination circuit.

Claims

[Scope of utility model registration request]

When gas such as city gas is detected, an output at a first voltage level is generated between a pair of output terminals, and when no gas is detected, an output at a second voltage level lower than the first voltage level is generated between the output terminals. , a plurality of pairs of signal input terminals are provided to connect a gas leak detector that makes the output voltage between the output terminals OV when the power is turned off, and one of each signal input terminal is commonly connected through a diode, and the other is directly connected. A series circuit of an output transistor and an output resistor is connected between both common connection points, and the voltage of either signal input terminal is at the third voltage level or the voltage of all signal input terminals is connected in common. a priority discrimination circuit that includes a voltage detection means that turns on an output transistor when the output transistor is at a second voltage level; and a gas leak detection circuit that generates an output when the voltage across the output resistor is at a third voltage level. , a trouble detection circuit that generates an output when the voltage across the output resistor is OV, a first constant voltage circuit that generates a constant voltage at a third voltage level, and the output of a subsequent repeater are connected. a correction circuit that turns on when the voltage of the expansion connection terminal is at a third voltage level or when the detection output of the gas leakage detection circuit is input to generate the output voltage of the first constant voltage circuit to the output terminal; a constant voltage generating circuit that generates a constant voltage at a voltage level of , and a switch that is turned on when the voltage of an expansion connection terminal is at a second voltage level to generate an output voltage of the second constant voltage circuit at the output terminal. In a repeater of a gas leak detection system, the repeater is equipped with a discriminating circuit that is turned on by the detection output of the trouble detection circuit and is made up of the switch means and another switch means that is turned off,
A repeater for a gas leak detection system consisting of a vacancy control switch connected between an output terminal and an expansion connection terminal to short-circuit both terminals as necessary.