JPS5734470A - Ultrasonic wave type vehicle speed measuring device - Google Patents

Ultrasonic wave type vehicle speed measuring device

Info

Publication number
JPS5734470A
JPS5734470A JP10952380A JP10952380A JPS5734470A JP S5734470 A JPS5734470 A JP S5734470A JP 10952380 A JP10952380 A JP 10952380A JP 10952380 A JP10952380 A JP 10952380A JP S5734470 A JPS5734470 A JP S5734470A
Authority
JP
Japan
Prior art keywords
vehicle
ultrasonic wave
reflected
doppler
wave
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
JP10952380A
Other languages
Japanese (ja)
Inventor
Eiji Watabe
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.)
Koito Industries Ltd
Original Assignee
Koito Industries 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 Koito Industries Ltd filed Critical Koito Industries Ltd
Priority to JP10952380A priority Critical patent/JPS5734470A/en
Publication of JPS5734470A publication Critical patent/JPS5734470A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO 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
    • G01S15/00Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/50Systems of measurement, based on relative movement of the target
    • G01S15/58Velocity or trajectory determination systems; Sense-of-movement determination systems

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Acoustics & Sound (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Traffic Control Systems (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

PURPOSE:To measure the accurate speed of the vehicle by sensing the Doppler frequency of the reflected wave from the vehicle only during a specified time, and receiving the reflected sonic wave from the vehicle passing a specified position. CONSTITUTION:A means which intermittently generates the ultrasonic wave is constituted by an ultrasonic wave transceiver 7, a transmitting driver 12, a reference oscillator 13, and a timing signal generator 14. The reflected wave from the vehicle is inputted to a Doppler signal sensor 16 via the ultrasonic wave transceiver 7 and a received signal selecting amplifier 15. The Doppler signal which is sensed by the Doppler signal sensor 16 is inputted to a speed computing and processing circuit 19 via a Doppler signal selecting filter 17 and a gate switch circuit 18, and the vehicle speed is computed. The filter 17 and the gate switch 18 allow the Doppler frequency in the reflected ultrasonic wave from the vehicle to pass during only the specified time other than the intermittent driving time.
JP10952380A 1980-08-09 1980-08-09 Ultrasonic wave type vehicle speed measuring device Pending JPS5734470A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10952380A JPS5734470A (en) 1980-08-09 1980-08-09 Ultrasonic wave type vehicle speed measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10952380A JPS5734470A (en) 1980-08-09 1980-08-09 Ultrasonic wave type vehicle speed measuring device

Publications (1)

Publication Number Publication Date
JPS5734470A true JPS5734470A (en) 1982-02-24

Family

ID=14512409

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10952380A Pending JPS5734470A (en) 1980-08-09 1980-08-09 Ultrasonic wave type vehicle speed measuring device

Country Status (1)

Country Link
JP (1) JPS5734470A (en)

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