JPH026394U

JPH026394U -

Info

Publication number: JPH026394U
Application number: JP8111088U
Authority: JP
Priority date: 1988-06-21
Filing date: 1988-06-21
Publication date: 1990-01-17

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例の構成図、第２図は
第１図の実施例の時間関係説明図、第３図―ａ
及び第３図―ｂは夫々煙を含んだ気流に風速（
２０cm／秒）がある場合の煙検知器周辺の煙濃度
の経時変化と２空間の夫々の煙濃度検出素子の出
力電圧の測定グラフ、第３図―ａ及び第３図―
ｂは夫々、無風状態における煙検知器周辺の煙
濃度の経時変化と、煙濃度が上昇した時の２空間
の夫々の煙検出素子の出力電圧の測定グラフ、第
４図は従来の煙感知器の構成図である。１１…発光素子、１２―１，１２―２…受光素
子、１３―１，１３―２…増幅器、１４，１６，
１８，１９…オア回路、１５，１７…アンド回路
、２０…隔離板、２１―１，２１―２…暗箱、２
２…煙等の微粒子。 Fig. 1 is a configuration diagram of an embodiment of the present invention, Fig. 2 is a time relationship explanatory diagram of the embodiment of Fig. 1, and Fig. 3-a.
and Figure 3-b are the wind velocity (
Figures 3-a and 3-2 are measurement graphs of the change in smoke concentration around the smoke detector over time and the output voltage of the smoke concentration detection elements in each of the two spaces when the smoke density is 20cm/sec).
b is a measurement graph of the change in smoke concentration around the smoke detector over time in a windless state, and the output voltage of the smoke detection elements in each of the two spaces when the smoke concentration increases, and Fig. 4 is a graph of a conventional smoke detector. FIG. 11... Light emitting element, 12-1, 12-2... Light receiving element, 13-1, 13-2... Amplifier, 14, 16,
18, 19... OR circuit, 15, 17... AND circuit, 20... Separation plate, 21-1, 21-2... Dark box, 2
2... Particulates such as smoke.

Claims

[Scope of utility model registration request]

a dark box having two spaces separated by a separator; a light emitting element that projects output light into the dark box;
at least two light receiving elements each provided in the isolated space to receive light scattered by smoke of the output light; two amplifiers each amplifying the output of the light receiving elements; and two output levels of the amplifiers. In a smoke detector configured with a means for comparing, detecting the occurrence of smoke, and outputting a signal, the output level of the two amplifiers is compared, and the output level of one amplifier exceeds a certain level. a first logic circuit that generates a first pulse when the output level exceeds the predetermined level, and generates a second pulse having a width different from the first pulse when the output levels of the two amplifiers a second logic circuit that starts when the second pulse is input and operates for a time longer than the first and second pulse widths; When either of the second pulses is input, a third pulse having a width different from the first and second pulse widths is generated, and when the first pulse or the second pulse is input, the timer 1. A smoke detector comprising: a third logic circuit formed to restart the smoke detector; and means for outputting the third pulse.