JPS57189082A - Range finder - Google Patents

Range finder

Info

Publication number
JPS57189082A
JPS57189082A JP56073304A JP7330481A JPS57189082A JP S57189082 A JPS57189082 A JP S57189082A JP 56073304 A JP56073304 A JP 56073304A JP 7330481 A JP7330481 A JP 7330481A JP S57189082 A JPS57189082 A JP S57189082A
Authority
JP
Japan
Prior art keywords
circuit
received pulse
pulses
light
gate
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
Application number
JP56073304A
Other languages
Japanese (ja)
Inventor
Hiroshi Asano
Michio Oomichi
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP56073304A priority Critical patent/JPS57189082A/en
Publication of JPS57189082A publication Critical patent/JPS57189082A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
    • G01S17/06—Systems determining position data of a target
    • G01S17/08—Systems determining position data of a target for measuring distance only
    • G01S17/10—Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Optical Radar Systems And Details Thereof (AREA)

Abstract

PURPOSE:To achieve reception with the highest sensitivity by dividing a reception time zone, selectively extracting plural received pulses by the emission of one laser light, counting a final extracted received pulse train, and then varying the sensitivity of a receiver according to the magnitude of the pulses. CONSTITUTION:A counting circuit 8 counts a basically final received pulse train. While laser light is reflected repeatedly, a range measurement limiting circuit 9 couples with the circuit 8 to generate gate pulses at time which corresponds to a point predetermined distance before a last measured distance value. A gate circuit 10 sends out a received pulse together with a gate pulse command from the circuit 9. A peak holding circuit 11 holds the peak value of the received pulse fo a certain time. A bias control circuit 12 controls the bias voltage of a photodetector 5 according to the amplitude value of the received pulse from the circuit 11. When a disturbing light pulse due to a scatter by raindrops and reflected light from a target are distant, separation by a distance-classified limiting function is carried out and when the separation from the scattered light is impossible because the target is too close, an AGC function is put in operation.
JP56073304A 1981-05-15 1981-05-15 Range finder Pending JPS57189082A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56073304A JPS57189082A (en) 1981-05-15 1981-05-15 Range finder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56073304A JPS57189082A (en) 1981-05-15 1981-05-15 Range finder

Publications (1)

Publication Number Publication Date
JPS57189082A true JPS57189082A (en) 1982-11-20

Family

ID=13514282

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56073304A Pending JPS57189082A (en) 1981-05-15 1981-05-15 Range finder

Country Status (1)

Country Link
JP (1) JPS57189082A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01208491A (en) * 1988-02-15 1989-08-22 Toshiyuki Ota Surface treatment of metal
JPH04204078A (en) * 1990-11-30 1992-07-24 Nec Corp Circuit for detecting and holding pam signal
JPH0562883U (en) * 1992-01-30 1993-08-20 株式会社ニコン Distance measuring device
JPH05231818A (en) * 1992-02-20 1993-09-07 Hitachi Zosen Corp Laser distance measuring device
JPH11326515A (en) * 1998-05-15 1999-11-26 Nikon Corp Lightwave distance measuring device
JP2008215878A (en) * 2007-02-28 2008-09-18 Yamaha Motor Co Ltd Light receiving device, laser radar device and vehicle
JP2008286669A (en) * 2007-05-18 2008-11-27 Sokkia Topcon Co Ltd Light wave distance meter
JP2011505545A (en) * 2007-09-27 2011-02-24 オムロン サイエンティフィック テクノロジーズ， インコーポレイテッド Clutter removal in an active object detection system.
JP2013124882A (en) * 2011-12-13 2013-06-24 Mitsubishi Electric Corp Laser radar device
JP2014059223A (en) * 2012-09-18 2014-04-03 Denso Corp Optical radar device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5623480A (en) * 1979-07-18 1981-03-05 Mitsubishi Heavy Ind Ltd Plural hull structure

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5623480A (en) * 1979-07-18 1981-03-05 Mitsubishi Heavy Ind Ltd Plural hull structure

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01208491A (en) * 1988-02-15 1989-08-22 Toshiyuki Ota Surface treatment of metal
JPH04204078A (en) * 1990-11-30 1992-07-24 Nec Corp Circuit for detecting and holding pam signal
JPH0562883U (en) * 1992-01-30 1993-08-20 株式会社ニコン Distance measuring device
JPH05231818A (en) * 1992-02-20 1993-09-07 Hitachi Zosen Corp Laser distance measuring device
JPH11326515A (en) * 1998-05-15 1999-11-26 Nikon Corp Lightwave distance measuring device
JP2008215878A (en) * 2007-02-28 2008-09-18 Yamaha Motor Co Ltd Light receiving device, laser radar device and vehicle
JP2008286669A (en) * 2007-05-18 2008-11-27 Sokkia Topcon Co Ltd Light wave distance meter
JP2011505545A (en) * 2007-09-27 2011-02-24 オムロン サイエンティフィック テクノロジーズ， インコーポレイテッド Clutter removal in an active object detection system.
JP2013124882A (en) * 2011-12-13 2013-06-24 Mitsubishi Electric Corp Laser radar device
JP2014059223A (en) * 2012-09-18 2014-04-03 Denso Corp Optical radar device

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