JPS6420486A - Object detecting device - Google Patents

Object detecting device

Info

Publication number
JPS6420486A
JPS6420486A JP62176762A JP17676287A JPS6420486A JP S6420486 A JPS6420486 A JP S6420486A JP 62176762 A JP62176762 A JP 62176762A JP 17676287 A JP17676287 A JP 17676287A JP S6420486 A JPS6420486 A JP S6420486A
Authority
JP
Japan
Prior art keywords
signal
circuit
light
output
light emission
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.)
Granted
Application number
JP62176762A
Other languages
Japanese (ja)
Other versions
JPH0531953B2 (en
Inventor
Yoshitaka Terada
Mikio Kyomasu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hamamatsu Photonics KK
Original Assignee
Hamamatsu Photonics KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hamamatsu Photonics KK filed Critical Hamamatsu Photonics KK
Priority to JP62176762A priority Critical patent/JPS6420486A/en
Publication of JPS6420486A publication Critical patent/JPS6420486A/en
Publication of JPH0531953B2 publication Critical patent/JPH0531953B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Geophysics And Detection Of Objects (AREA)

Abstract

PURPOSE:To eliminate an erroneous signal caused by a disturbance light, by discriminating whether a signal light exists or not, based on a state of an output signal at the time of light emission, and a state of an output signal within a prescribed period containing the time of light emission and the time of non- light emission. CONSTITUTION:A signal from a light receiving element 5 is eliminated a AC component and a low frequency component by an AC amplifying circuit 6, converted to a digital signal in a comparing circuit 7, and inputted to a waveform storing circuit 23 and a deciding circuit 22. In the deciding circuit 22, in case when it is decided that a signal exists by a decision timing signal DT, and also, a rise edge and a fall edge is detected during an output period of decision windows signal W1, W2, it is considered that an output signal is synchronized completely with a light emission timing signal TM, and it is considered that there has been a signal due to a signal light from a light emitting element 4, and an output of the waveform storing circuit 23 is inputted to an integration circuit 24 by a shift clock phi.
JP62176762A 1987-07-15 1987-07-15 Object detecting device Granted JPS6420486A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62176762A JPS6420486A (en) 1987-07-15 1987-07-15 Object detecting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62176762A JPS6420486A (en) 1987-07-15 1987-07-15 Object detecting device

Publications (2)

Publication Number Publication Date
JPS6420486A true JPS6420486A (en) 1989-01-24
JPH0531953B2 JPH0531953B2 (en) 1993-05-13

Family

ID=16019367

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62176762A Granted JPS6420486A (en) 1987-07-15 1987-07-15 Object detecting device

Country Status (1)

Country Link
JP (1) JPS6420486A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6285885A (en) * 1985-10-11 1987-04-20 Sharp Corp Optical modulation type detecting device
JPS62116286A (en) * 1985-11-15 1987-05-27 Sharp Corp Light modulation type detector

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6285885A (en) * 1985-10-11 1987-04-20 Sharp Corp Optical modulation type detecting device
JPS62116286A (en) * 1985-11-15 1987-05-27 Sharp Corp Light modulation type detector

Also Published As

Publication number Publication date
JPH0531953B2 (en) 1993-05-13

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees