JPH0466692U

JPH0466692U -

Info

Publication number: JPH0466692U
Application number: JP10707590U
Authority: JP
Priority date: 1990-10-12
Filing date: 1990-10-12
Publication date: 1992-06-12

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例の自動ドア用光学
式センサの模式的断面図、第２図は第１図のセン
サの設置状態を示す外観正面図、第３図は第１図
のセンサの模式的断面右側面図、第４図は第１図
のセンサの検知領域の概略図、第５図は第１図の
センサに係るフオトダイオードの接続図、第６図
は従来の自動ドア用光学式センサの一例の模式的
断面図、第７図は第６図のセンサの設置状態を示
す外観正面図、第８図は第６図のセンサの模式的
断面右側面図である。符号の説明、１……自動ドア用光学式センサ、
２ａ，ｂ，ｃ，ｄ……ＬＥＤ、３ａ，ｂ，ｃ，ｄ
……フオトダイオード、５……受光用の凹面鏡、
８……赤外線透過性の窓。 Fig. 1 is a schematic sectional view of an optical sensor for automatic doors according to an embodiment of this invention, Fig. 2 is an external front view showing the installed state of the sensor shown in Fig. 1, and Fig. 3 is a schematic cross-sectional view of the sensor shown in Fig. 1. Fig. 4 is a schematic diagram of the detection area of the sensor shown in Fig. 1, Fig. 5 is a connection diagram of the photodiode related to the sensor shown in Fig. 1, and Fig. 6 is a diagram for a conventional automatic door. FIG. 7 is a schematic cross-sectional view of an example of an optical sensor, FIG. 7 is an external front view showing an installed state of the sensor of FIG. 6, and FIG. 8 is a schematic cross-sectional right side view of the sensor of FIG. 6. Explanation of symbols, 1... Optical sensor for automatic doors,
2a, b, c, d...LED, 3a, b, c, d
...Photodiode, 5...Concave mirror for light reception,
8...Infrared transparent window.

Claims

[Scope of Claim for Utility Model Registration] An optical sensor for automatic doors that detects an object approaching the door by receiving reflected near-infrared light emitted by a light projecting means with a light receiving means, which includes a light projecting means and a light receiving means. Two of each were placed parallel to the door, and two of each were placed perpendicular to the door, and the four light emitting elements were operated at the same time, and the two light receiving elements were connected so that they had opposite polarity. Features: Optical sensor for automatic doors.