JPH01151391U - - Google Patents
Info
- Publication number
- JPH01151391U JPH01151391U JP4631988U JP4631988U JPH01151391U JP H01151391 U JPH01151391 U JP H01151391U JP 4631988 U JP4631988 U JP 4631988U JP 4631988 U JP4631988 U JP 4631988U JP H01151391 U JPH01151391 U JP H01151391U
- Authority
- JP
- Japan
- Prior art keywords
- light
- detection device
- object detection
- optical object
- protrusion
- 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 6
- 230000003287 optical effect Effects 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims 1
Landscapes
- Burglar Alarm Systems (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4631988U JPH01151391U (ro) | 1988-04-06 | 1988-04-06 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4631988U JPH01151391U (ro) | 1988-04-06 | 1988-04-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH01151391U true JPH01151391U (ro) | 1989-10-19 |
Family
ID=31272589
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4631988U Pending JPH01151391U (ro) | 1988-04-06 | 1988-04-06 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH01151391U (ro) |
-
1988
- 1988-04-06 JP JP4631988U patent/JPH01151391U/ja active Pending