JPS5744871A - Detecting circuit for speed for doppler radar - Google Patents

Detecting circuit for speed for doppler radar

Info

Publication number
JPS5744871A
JPS5744871A JP12037380A JP12037380A JPS5744871A JP S5744871 A JPS5744871 A JP S5744871A JP 12037380 A JP12037380 A JP 12037380A JP 12037380 A JP12037380 A JP 12037380A JP S5744871 A JPS5744871 A JP S5744871A
Authority
JP
Japan
Prior art keywords
ball
speed
circuit
doppler signal
bat
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
JP12037380A
Other languages
Japanese (ja)
Inventor
Motoya Miura
Akira Endo
Katsuhiro Kimura
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.)
Hitachi Ltd
Maxell Holdings Ltd
Original Assignee
Hitachi Ltd
Hitachi Maxell 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 Hitachi Ltd, Hitachi Maxell Ltd filed Critical Hitachi Ltd
Priority to JP12037380A priority Critical patent/JPS5744871A/en
Publication of JPS5744871A publication Critical patent/JPS5744871A/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 make it possible to measure the speed of a ball at the moment said ball is hit by means of a club, bat or the like, by utilizing the fact that when the fluctuation of the input frequency becomes small, the phase comparison output pulse width of a phase-locked loop (PLL) circuit becomes small. CONSTITUTION:A detection Doppler signal based on the frequency shift according to the moving speed of a moving object 1 such as a ball used in golf or baseball is applied to a PLL circuit 11 through a waveform shaping circuit 7. When the fact that the phase comparison output pulse width varying with the change of the input frequency of said circuit 11 has become less than a given value is detected by means of a synchronism detecting circuit 12 and a phase comparator 13, the synchronized state with the Doppler signal by means of the ball 1 having less speed change is judged to have been reached. Then, the start of the clock signal counting by means of a counter 8 is controlled. Accordingly, it is also possible to measure the speed of a ball at the moment it is hit by means of a club, bat or the like according to the Doppler signal from the ball separated therefrom the Doppler signal by means of the club or bat.
JP12037380A 1980-08-29 1980-08-29 Detecting circuit for speed for doppler radar Pending JPS5744871A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12037380A JPS5744871A (en) 1980-08-29 1980-08-29 Detecting circuit for speed for doppler radar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12037380A JPS5744871A (en) 1980-08-29 1980-08-29 Detecting circuit for speed for doppler radar

Publications (1)

Publication Number Publication Date
JPS5744871A true JPS5744871A (en) 1982-03-13

Family

ID=14784592

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12037380A Pending JPS5744871A (en) 1980-08-29 1980-08-29 Detecting circuit for speed for doppler radar

Country Status (1)

Country Link
JP (1) JPS5744871A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0211162A (en) * 1988-04-13 1990-01-16 Shiley Infusaid Inc Embedding injection system
JP2011107847A (en) * 2009-11-13 2011-06-02 Yupiteru Corp Device for supporting analysis of running method, and program
JP2015057099A (en) * 2014-11-04 2015-03-26 株式会社ユピテル Running style analysis supporting device and program

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0211162A (en) * 1988-04-13 1990-01-16 Shiley Infusaid Inc Embedding injection system
JP2011107847A (en) * 2009-11-13 2011-06-02 Yupiteru Corp Device for supporting analysis of running method, and program
JP2015057099A (en) * 2014-11-04 2015-03-26 株式会社ユピテル Running style analysis supporting device and program

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