JPS56106158A - Speedometer - Google Patents

Speedometer

Info

Publication number
JPS56106158A
JPS56106158A JP890180A JP890180A JPS56106158A JP S56106158 A JPS56106158 A JP S56106158A JP 890180 A JP890180 A JP 890180A JP 890180 A JP890180 A JP 890180A JP S56106158 A JPS56106158 A JP S56106158A
Authority
JP
Japan
Prior art keywords
signal
zero cross
time
doppler
counted
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
JP890180A
Other languages
Japanese (ja)
Inventor
Yoshio Numayasu
Tetsuro Ogawa
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.)
Tokyo Keiki Inc
Original Assignee
Tokyo Keiki 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 Tokyo Keiki Co Ltd filed Critical Tokyo Keiki Co Ltd
Priority to JP890180A priority Critical patent/JPS56106158A/en
Publication of JPS56106158A publication Critical patent/JPS56106158A/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
    • 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
    • G01S13/50—Systems of measurement based on relative movement of target
    • G01S13/58—Velocity or trajectory determination systems; Sense-of-movement determination systems

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 remove disturbance signals in making measurement by detecting a Doppler signal through filter circuits and inhibiting the counting of the zero cross signal for a prescribed time after the emission of the zero cross signal, in a Doppler speedometer. CONSTITUTION:The radio waves emitted from an antenna 1 to a moving body M are again received in an antenna 1, and are mixed with transmission waves and are detected in a transmitter-receiver 2. This detection signal passes through BPF.FA, FB, FC through a switch SW2 which is changed over according to speeds, whereby only the Doppler signal is selected. This Doppler signal is amplified 4, and a zero cross signal is detected 5, is applied to a monostable circuit 6 and is counted 7. At this time, the output of the monostable circuit 6 is also applied to a time inhibiting gate 13, by which an AND circuit 14 is closed for a fixed time, so that no zero cross signals are counted.
JP890180A 1980-01-29 1980-01-29 Speedometer Pending JPS56106158A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP890180A JPS56106158A (en) 1980-01-29 1980-01-29 Speedometer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP890180A JPS56106158A (en) 1980-01-29 1980-01-29 Speedometer

Publications (1)

Publication Number Publication Date
JPS56106158A true JPS56106158A (en) 1981-08-24

Family

ID=11705574

Family Applications (1)

Application Number Title Priority Date Filing Date
JP890180A Pending JPS56106158A (en) 1980-01-29 1980-01-29 Speedometer

Country Status (1)

Country Link
JP (1) JPS56106158A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5934160A (en) * 1982-08-20 1984-02-24 Natl Space Dev Agency Japan<Nasda> Microwave scattering meter
EP0488545A2 (en) * 1990-11-30 1992-06-03 Matsushita Electric Industrial Co., Ltd. Ultrasonic doppler blood-flow meter
US7410535B2 (en) 2004-08-23 2008-08-12 Samsung Gwangju Electronics Co., Ltd. Cyclone separating apparatus and a vacuum cleaner having the same

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5934160A (en) * 1982-08-20 1984-02-24 Natl Space Dev Agency Japan<Nasda> Microwave scattering meter
JPH022540B2 (en) * 1982-08-20 1990-01-18 Uchu Kaihatsu Jigyodan
EP0488545A2 (en) * 1990-11-30 1992-06-03 Matsushita Electric Industrial Co., Ltd. Ultrasonic doppler blood-flow meter
US5261407A (en) * 1990-11-30 1993-11-16 Matsushita Electric Industrial Co., Ltd. Ultrasonic doppler blood-flow meter
US7410535B2 (en) 2004-08-23 2008-08-12 Samsung Gwangju Electronics Co., Ltd. Cyclone separating apparatus and a vacuum cleaner having the same

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