JPH047382U - - Google Patents
Info
- Publication number
- JPH047382U JPH047382U JP4725490U JP4725490U JPH047382U JP H047382 U JPH047382 U JP H047382U JP 4725490 U JP4725490 U JP 4725490U JP 4725490 U JP4725490 U JP 4725490U JP H047382 U JPH047382 U JP H047382U
- Authority
- JP
- Japan
- Prior art keywords
- area
- infrared rays
- light
- detection device
- intrusion detection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Landscapes
- Burglar Alarm Systems (AREA)
Description
第１図はこの考案の侵入検知装置の一実施例を
概略的に示す縦断面図、第２図はその電気的な構
成を示すブロツク線図、第３図は従来の侵入検知
装置の一例を概略的に示す縦断面図、第４図はそ
の発光部と受光部との境界部に位置するフイルタ
を示す縦断面図である。
図面において、１……ケーシング、２……遮光
板、３，４……区画、５……発光ユニツト、７…
…受光ユニツト、２１……可視光カツトフイルタ
、２２……フレネルレンズ、２３……中央部、２
４……周縁部である。
Fig. 1 is a longitudinal sectional view schematically showing an embodiment of the intrusion detection device of this invention, Fig. 2 is a block diagram showing its electrical configuration, and Fig. 3 is an example of a conventional intrusion detection device. FIG. 4 is a longitudinal sectional view schematically showing a filter located at the boundary between the light emitting part and the light receiving part. In the drawings, 1...casing, 2...shading plate, 3, 4...compartment, 5...light emitting unit, 7...
...Light receiving unit, 21...Visible light cut filter, 22...Fresnel lens, 23...Central part, 2
4... It is a peripheral part.
Claims (1)
し、その反射光を受光ユニツトで受光して受光レ
ベルの変化によりその領域内に人等の障害物の存
在を検出する侵入検知装置において、前記発光ユ
ニツトと前記受光ユニツトはそれぞれ前記領域に
前記赤外線を投光しそしてこの領域から反射した
前記赤外線を受光するように調整したフレネルレ
ンズで構成された検知領域調整手段を有し、前記
２枚のフレネルレンズの下面には１枚の平板状の
可視光カツトフイルタが設けられていることを特
徴とする侵入検知装置。 In an intrusion detection device that emits infrared rays from a light emitting unit to a predetermined area, receives the reflected light by a light receiving unit, and detects the presence of an obstacle such as a person in the area based on a change in the received light level. unit and the light receiving unit each have a detection area adjustment means constituted by a Fresnel lens adjusted to project the infrared rays to the area and receive the infrared rays reflected from this area, and the two Fresnel lenses An intrusion detection device characterized in that a single plate-shaped visible light cut filter is provided on the lower surface of the lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4725490U JPH047382U (en) | 1990-05-02 | 1990-05-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4725490U JPH047382U (en) | 1990-05-02 | 1990-05-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH047382U true JPH047382U (en) | 1992-01-23 |
Family
ID=31563024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4725490U Pending JPH047382U (en) | 1990-05-02 | 1990-05-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH047382U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54505A (en) * | 1977-06-03 | 1979-01-05 | Hitachi Ltd | Identifying system of types of incoming lines |
| JPS62134603A (en) * | 1985-12-06 | 1987-06-17 | Omron Tateisi Electronics Co | Photoelectric switch |
-
1990
- 1990-05-02 JP JP4725490U patent/JPH047382U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54505A (en) * | 1977-06-03 | 1979-01-05 | Hitachi Ltd | Identifying system of types of incoming lines |
| JPS62134603A (en) * | 1985-12-06 | 1987-06-17 | Omron Tateisi Electronics Co | Photoelectric switch |