JPH0212685U

JPH0212685U -

Info

Publication number: JPH0212685U
Application number: JP9006588U
Authority: JP
Priority date: 1988-07-08
Filing date: 1988-07-08
Publication date: 1990-01-26

Description

[Brief explanation of drawings]

第１図はこの考案の一実施例を示す構成図、第
２図は検出センサの一構成例を示す図、第３図は
焦電素子の検知するゾーンとそのゾーンに対する
人体の侵入方向を示す図、第４図は焦電素子の出
力波形図、第５図は従来の人体検出装置の構成図
、第６図は人体を検出する検出センサの監視ゾー
ンを示す図、第７図は検出センサの出力波形の一
例を示す波形図である。１……検出センサ、２……増幅器、３１……上
限レベル検出コンパレータ、３２……下限レベル
検出コンパレータ、４……遅延回路、５……短絡
回路、１Ａ……方向検知部、１Ｂ……方向検知部
。 Fig. 1 is a configuration diagram showing an embodiment of this invention, Fig. 2 is a diagram showing an example of the configuration of a detection sensor, and Fig. 3 shows the zone detected by the pyroelectric element and the direction in which the human body enters the zone. Figure 4 is an output waveform diagram of the pyroelectric element, Figure 5 is a configuration diagram of a conventional human body detection device, Figure 6 is a diagram showing the monitoring zone of a detection sensor that detects a human body, and Figure 7 is a diagram of the detection sensor. FIG. 2 is a waveform diagram showing an example of an output waveform of the . 1...Detection sensor, 2...Amplifier, 31...Upper limit level detection comparator, 32...Lower limit level detection comparator, 4...Delay circuit, 5...Short circuit, 1A...Direction detection unit, 1B...Direction Detection part.

Claims

[Scope of utility model registration request]

a detection sensor that detects a human body and outputs a predetermined signal when a human body approaches; and an upper limit level detection comparator that outputs a signal to that effect when the level of the signal output from the detection sensor is equal to or higher than a predetermined value.
A lower limit level detection comparator that outputs a signal when the level of the signal output from the detection sensor is below a predetermined value, and a signal output from one of the two detection comparators mentioned above is delayed for a certain period of time. What is claimed is: 1. A human body detection device comprising: a delay circuit that causes the delay circuit to short-circuit the output of the other detection comparator based on a signal output from the delay circuit;