JPS5458047A - Method of metering spacing between cars - Google Patents

Method of metering spacing between cars

Info

Publication number
JPS5458047A
JPS5458047A JP12345077A JP12345077A JPS5458047A JP S5458047 A JPS5458047 A JP S5458047A JP 12345077 A JP12345077 A JP 12345077A JP 12345077 A JP12345077 A JP 12345077A JP S5458047 A JPS5458047 A JP S5458047A
Authority
JP
Japan
Prior art keywords
spacing
cars
optical
car
optical markers
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
JP12345077A
Other languages
Japanese (ja)
Inventor
Susumu Kashiwa
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.)
Furukawa Electric Co Ltd
Original Assignee
Furukawa Electric Co Ltd
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 Furukawa Electric Co Ltd filed Critical Furukawa Electric Co Ltd
Priority to JP12345077A priority Critical patent/JPS5458047A/en
Publication of JPS5458047A publication Critical patent/JPS5458047A/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
    • G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
    • G01S11/12—Systems for determining distance or velocity not using reflection or reradiation using electromagnetic waves other than radio waves

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Measurement Of Optical Distance (AREA)
  • Closed-Circuit Television Systems (AREA)

Abstract

PURPOSE: To make it possible to meter the spacing between cars at a distant and to improve the metering accuracy by providing an optical pattern on a preceding car and an image pickup device on a accompanying car so as to optically detect the spacing inbetween.
CONSTITUTION: The preceding one 1 of two cars, the spacing between which is to be metered, is formed with an optical pattern 3, e.g., optical markers 3a at the crests a, b, c and d with a view to visually trapping the preceding car. An image pickup device 4 for generating video signals in response to the optical markers 3a is carried on an accompanying car 2. Let it be assumed that the horizontal scanning line for detecting the optical markers a and b is denoted at A, that the horizontal scanning line for detecting the optical markers c and 3 is denoted at B, and that the pattern size l on the image is represented by the size between the scanning lines A and B. By reading the scanning lines between the lines A and B, the pattern size l, which is adversely proportional to the spacing d between the cars can be detected by means of video signal processor 5
COPYRIGHT: (C)1979,JPO&Japio
JP12345077A 1977-10-17 1977-10-17 Method of metering spacing between cars Pending JPS5458047A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12345077A JPS5458047A (en) 1977-10-17 1977-10-17 Method of metering spacing between cars

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12345077A JPS5458047A (en) 1977-10-17 1977-10-17 Method of metering spacing between cars

Publications (1)

Publication Number Publication Date
JPS5458047A true JPS5458047A (en) 1979-05-10

Family

ID=14860898

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12345077A Pending JPS5458047A (en) 1977-10-17 1977-10-17 Method of metering spacing between cars

Country Status (1)

Country Link
JP (1) JPS5458047A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59211807A (en) * 1983-05-17 1984-11-30 Niles Parts Co Ltd Apparatus for measuring distance between vehicles utilizing number plate
JPH0348708U (en) * 1989-09-20 1991-05-10
JPH03282315A (en) * 1990-03-30 1991-12-12 Yamatake Honeywell Co Ltd Method and instrument for measuring separation distance of mobile object
JPH03282316A (en) * 1990-03-30 1991-12-12 Yamatake Honeywell Co Ltd Method and instrument for measuring separation distance of mobile object
EP1055939A2 (en) * 1999-05-27 2000-11-29 Fujitsu Limited Distance measuring device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59211807A (en) * 1983-05-17 1984-11-30 Niles Parts Co Ltd Apparatus for measuring distance between vehicles utilizing number plate
JPH0348708U (en) * 1989-09-20 1991-05-10
JPH03282315A (en) * 1990-03-30 1991-12-12 Yamatake Honeywell Co Ltd Method and instrument for measuring separation distance of mobile object
JPH03282316A (en) * 1990-03-30 1991-12-12 Yamatake Honeywell Co Ltd Method and instrument for measuring separation distance of mobile object
EP1055939A2 (en) * 1999-05-27 2000-11-29 Fujitsu Limited Distance measuring device
US6288774B1 (en) * 1999-05-27 2001-09-11 Fujitsu Limited Distance measuring device
EP1055939A3 (en) * 1999-05-27 2002-05-02 Fujitsu Limited Distance measuring device

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