JPS6412289A - Object approach detector - Google Patents
Object approach detectorInfo
- Publication number
- JPS6412289A JPS6412289A JP62168434A JP16843487A JPS6412289A JP S6412289 A JPS6412289 A JP S6412289A JP 62168434 A JP62168434 A JP 62168434A JP 16843487 A JP16843487 A JP 16843487A JP S6412289 A JPS6412289 A JP S6412289A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- output
- circuit
- peak hold
- output signal
- 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
Landscapes
- Geophysics And Detection Of Objects (AREA)
Abstract
PURPOSE:To detect exact object approach by comparing signal levels of successive receiving signals mutually and providing a signal processing part which judges whether or not the object exists by means of conforming that a signal level difference exceeds a prescribed threshold. CONSTITUTION:In a processing part 6 of a detector an output signal a of a head amplification circuit 5 is guided to an analog switch 7, the signal corresponding to a nth pulse to a peak hold circuit 8 and the other signal corresponding to a n+1th pulse to the other peak hold circuit 9 by means of a timing pulse of a clock circuit 2. The output signals b, c of the peak hold circuit 8, 9 are transmitted to a differential amplification 11 and the absolute value of the difference is is output as an output signal d. This output signal d is compared with a reference signal e from a reference voltage generating circuit 13 by a comparator 12, a detecting signal 14 is output in the case where the output signal is larger than the signal level of the reference signal e representing a threshold and not output in the case where the output signal is smaller than the signal level. Therefore, the reflecting light from mist or cloud can be prevented from being judged as an object.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62168434A JPS6412289A (en) | 1987-07-06 | 1987-07-06 | Object approach detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62168434A JPS6412289A (en) | 1987-07-06 | 1987-07-06 | Object approach detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6412289A true JPS6412289A (en) | 1989-01-17 |
Family
ID=15868045
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62168434A Pending JPS6412289A (en) | 1987-07-06 | 1987-07-06 | Object approach detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6412289A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0357992A (en) * | 1989-07-26 | 1991-03-13 | Matsushita Electric Works Ltd | Human body detector |
JP2021195298A (en) * | 2020-06-16 | 2021-12-27 | エスケイシー・カンパニー・リミテッドSkc Co., Ltd. | Silicon carbide ingot, wafer and method of manufacturing the same |
-
1987
- 1987-07-06 JP JP62168434A patent/JPS6412289A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0357992A (en) * | 1989-07-26 | 1991-03-13 | Matsushita Electric Works Ltd | Human body detector |
JP2021195298A (en) * | 2020-06-16 | 2021-12-27 | エスケイシー・カンパニー・リミテッドSkc Co., Ltd. | Silicon carbide ingot, wafer and method of manufacturing the same |
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