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)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4725490U JPH047382U (pt) | 1990-05-02 | 1990-05-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4725490U JPH047382U (pt) | 1990-05-02 | 1990-05-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH047382U true JPH047382U (pt) | 1992-01-23 |
Family
ID=31563024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4725490U Pending JPH047382U (pt) | 1990-05-02 | 1990-05-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH047382U (pt) |
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 (ja) * | 1985-12-06 | 1987-06-17 | Omron Tateisi Electronics Co | 光電スイツチ |
-
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 (ja) * | 1985-12-06 | 1987-06-17 | Omron Tateisi Electronics Co | 光電スイツチ |