JPS57144477A - Range finder - Google Patents

Range finder

Info

Publication number
JPS57144477A
JPS57144477A JP3028581A JP3028581A JPS57144477A JP S57144477 A JPS57144477 A JP S57144477A JP 3028581 A JP3028581 A JP 3028581A JP 3028581 A JP3028581 A JP 3028581A JP S57144477 A JPS57144477 A JP S57144477A
Authority
JP
Japan
Prior art keywords
pulse
timing
receiving
received
resending
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
JP3028581A
Other languages
Japanese (ja)
Other versions
JPS6326356B2 (en
Inventor
Osamu Okamoto
Tatsuyoshi Koshio
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP3028581A priority Critical patent/JPS57144477A/en
Priority to US06/262,860 priority patent/US4455556A/en
Priority to DE8181302212T priority patent/DE3163473D1/en
Priority to EP81302212A priority patent/EP0040541B1/en
Publication of JPS57144477A publication Critical patent/JPS57144477A/en
Publication of JPS6326356B2 publication Critical patent/JPS6326356B2/ja
Granted 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
    • 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
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/76—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted

Landscapes

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

Abstract

PURPOSE:To reduce influence of a reflected wave in the radio wave propagation, and to measure a range exactly, by detecting a timing position of a pulse having a specific shape, among received response pulses. CONSTITUTION:In the transponder side, a radio wave received by an antenna 16 is led to a pre-selector 17, in which its receiving band is selected and its frequency is converted, the received waveform is linearly detected by a detecting part 19, and also a pulse timing of the first pulse of the received wave is decided by delay comparing part 20. Subsequently, in accordance with this timing, timing of a resending pulse delayed by a constant interval of time is made in a control part 22, is sent to a transmitting system 21, and a resending pulse is generated. A receiving timing of the first pulse is derived by receiving this reradiated signal by a receiving system. After that, it is compared with a sending timing by a time control part, by which a range is measured.
JP3028581A 1980-05-19 1981-03-03 Range finder Granted JPS57144477A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP3028581A JPS57144477A (en) 1981-03-03 1981-03-03 Range finder
US06/262,860 US4455556A (en) 1980-05-19 1981-05-12 Distance measuring equipment
DE8181302212T DE3163473D1 (en) 1980-05-19 1981-05-19 Distance measuring equipment
EP81302212A EP0040541B1 (en) 1980-05-19 1981-05-19 Distance measuring equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3028581A JPS57144477A (en) 1981-03-03 1981-03-03 Range finder

Publications (2)

Publication Number Publication Date
JPS57144477A true JPS57144477A (en) 1982-09-07
JPS6326356B2 JPS6326356B2 (en) 1988-05-30

Family

ID=12299440

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3028581A Granted JPS57144477A (en) 1980-05-19 1981-03-03 Range finder

Country Status (1)

Country Link
JP (1) JPS57144477A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008190955A (en) * 2007-02-02 2008-08-21 Toshiba Corp Pulse signal transmitting device, adjusting method of its waveform, and dme ground station device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008190955A (en) * 2007-02-02 2008-08-21 Toshiba Corp Pulse signal transmitting device, adjusting method of its waveform, and dme ground station device

Also Published As

Publication number Publication date
JPS6326356B2 (en) 1988-05-30

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