GB1259318A - - Google Patents

Info

Publication number
GB1259318A
GB1259318A GB3066869A GB1259318DA GB1259318A GB 1259318 A GB1259318 A GB 1259318A GB 3066869 A GB3066869 A GB 3066869A GB 1259318D A GB1259318D A GB 1259318DA GB 1259318 A GB1259318 A GB 1259318A
Authority
GB
United Kingdom
Prior art keywords
distance
wave
path
modulator
reflector
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.)
Expired
Application number
GB3066869A
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 filed Critical
Publication of GB1259318A publication Critical patent/GB1259318A/en
Expired 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
    • G01S17/32—Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
    • 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
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/08—Systems for measuring distance only
    • G01S13/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
    • G01S13/36—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated with phase comparison between the received signal and the contemporaneously transmitted signal
    • G01S13/40—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated with phase comparison between the received signal and the contemporaneously transmitted signal wherein the frequency of transmitted signal is adjusted to give a predetermined phase relationship
    • 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

Landscapes

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

Abstract

1,259,318. Distance measurement. CARL ZEISS JENA VEB. 17 June, 1969, No. 30668/69. Heading H4D. Specification describes an electromagnetic wave distance measuring apparatus including a modulator transmitter M for transmitting a modulated electromagnet wave and a detector/ receiver D which receives the modulated wave after reflection thereof at a distant reflector RE. The detector modulation signal is fed via a circuit of unity loop gain to the control input of the modulator M. The path of the wave and signal thus form a self-oscillating loop, oscillating at a frequency f E depending on the total length of said path such that: when n is an integer. Part of the total path length is contained in the electronic circuitry and is generally unknown. To overcome this a variable phase shifter F is inserted in the modulation signal path and a short circuiting reflector R K is provided at a position defining the near limit of the sought distance. With reflector R K in place a new oscillating loop is produced, resulting in a modulation frequency f k , whereby: c Short circuit distance=n2 - 2fk Delay E is thus adjusted until f E = f K =f whereby: Sought distance 2s= Total path length - short circuit distance = (n 1 - n 2 )c/2f 2f A frequency meter Z determines frequencies f E and f K and may be calibrated in range. The electromagnetic wave may be light and the modulator/transmitter a GaAs diode.
GB3066869A 1968-06-26 1969-06-17 Expired GB1259318A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DD13302868 1968-06-26
FR6914478A FR2044035A5 (en) 1968-06-26 1969-05-06
GB3066869 1969-06-17

Publications (1)

Publication Number Publication Date
GB1259318A true GB1259318A (en) 1972-01-05

Family

ID=27179721

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3066869A Expired GB1259318A (en) 1968-06-26 1969-06-17

Country Status (4)

Country Link
CH (1) CH489024A (en)
DE (1) DE1807237A1 (en)
FR (1) FR2044035A5 (en)
GB (1) GB1259318A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2471580A1 (en) * 1979-12-11 1981-06-19 Smiths Industries Ltd APPARATUS FOR DETECTING THE PROXIMITY OF TURBINE FINS AND A REFERENCE LOCATION
GB2239368A (en) * 1989-12-20 1991-06-26 Hunting Eng Ltd Optical range finding system
EP0747727A2 (en) * 1995-06-08 1996-12-11 Erwin Sick GmbH Optik-Elektronik Method and device for measuring distance

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE631843A (en) * 1962-05-17
GB2040131A (en) * 1978-12-13 1980-08-20 United Technologies Corp Electrooptic instruments
DE3326244C1 (en) * 1983-07-21 1985-02-21 Klever GmbH & Co KG, 5632 Wermelskirchen Longitudinally adjustable support rod for curtains, stands or the like
FR2601145B1 (en) * 1986-05-20 1991-10-25 Simeray Janick TUNER WITH A TUNED FREQUENCY
FR2734645B1 (en) * 1995-05-22 1997-07-04 Borre Sylvain USE A LASER DIODE FOR PRECISION MEASUREMENTS IN THE FIELD OF BUILDING AND PUBLIC WORKS
WO1998023972A1 (en) * 1996-11-26 1998-06-04 Precilaser Meter rule using laser diode for accurate measuring

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2471580A1 (en) * 1979-12-11 1981-06-19 Smiths Industries Ltd APPARATUS FOR DETECTING THE PROXIMITY OF TURBINE FINS AND A REFERENCE LOCATION
GB2239368A (en) * 1989-12-20 1991-06-26 Hunting Eng Ltd Optical range finding system
GB2239368B (en) * 1989-12-20 1994-04-27 Hunting Eng Ltd Electro-optical ranging systems
EP0747727A2 (en) * 1995-06-08 1996-12-11 Erwin Sick GmbH Optik-Elektronik Method and device for measuring distance
EP0747727A3 (en) * 1995-06-08 1998-07-22 Sick Ag Method and device for measuring distance

Also Published As

Publication number Publication date
DE1807237A1 (en) 1970-04-23
CH489024A (en) 1970-04-15
FR2044035A5 (en) 1971-02-19

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees