FR2368716A1 - Electronic speedometer providing direct digital output - includes light and photocell separated by apertured rotating disc and supplying signal to pulse counting circuit - Google Patents

Electronic speedometer providing direct digital output - includes light and photocell separated by apertured rotating disc and supplying signal to pulse counting circuit

Info

Publication number
FR2368716A1
FR2368716A1 FR7631556A FR7631556A FR2368716A1 FR 2368716 A1 FR2368716 A1 FR 2368716A1 FR 7631556 A FR7631556 A FR 7631556A FR 7631556 A FR7631556 A FR 7631556A FR 2368716 A1 FR2368716 A1 FR 2368716A1
Authority
FR
France
Prior art keywords
pulse counting
photocell
separated
rotating disc
digital output
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.)
Withdrawn
Application number
FR7631556A
Other languages
French (fr)
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.)
EQUIP RADIO CABLES AVIAT
Original Assignee
EQUIP RADIO CABLES AVIAT
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 EQUIP RADIO CABLES AVIAT filed Critical EQUIP RADIO CABLES AVIAT
Priority to FR7631556A priority Critical patent/FR2368716A1/en
Publication of FR2368716A1 publication Critical patent/FR2368716A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/486—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by photo-electric detectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
    • B60Q1/50—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating other intentions or conditions, e.g. request for waiting or overtaking
    • B60Q1/54—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating other intentions or conditions, e.g. request for waiting or overtaking for indicating speed outside of the vehicle
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P1/00—Details of instruments
    • G01P1/07—Indicating devices, e.g. for remote indication
    • G01P1/08—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers
    • G01P1/10—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds
    • G01P1/103—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds by comparing the value of the measured signal with one or several reference values
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/489—Digital circuits therefor

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Linear Or Angular Velocity Measurement And Their Indicating Devices (AREA)

Abstract

An electronic speedometer comprises an apertured stroboscopic disc (12) driven by mechanised linkage to the wheel drive output of the engine. Lamp (18) and detector (19) positioned on either side of the disc provide pulsed output signals representing vehicle velocity. These signals are applied to a processing circuit. The circuit comprises a time base and pulse counting element which convert the pulsed output of the stroboscope into a control signal. A digital display (A) produces a reading of vehicle velocity in response to application of the control signal.
FR7631556A 1976-10-20 1976-10-20 Electronic speedometer providing direct digital output - includes light and photocell separated by apertured rotating disc and supplying signal to pulse counting circuit Withdrawn FR2368716A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7631556A FR2368716A1 (en) 1976-10-20 1976-10-20 Electronic speedometer providing direct digital output - includes light and photocell separated by apertured rotating disc and supplying signal to pulse counting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7631556A FR2368716A1 (en) 1976-10-20 1976-10-20 Electronic speedometer providing direct digital output - includes light and photocell separated by apertured rotating disc and supplying signal to pulse counting circuit

Publications (1)

Publication Number Publication Date
FR2368716A1 true FR2368716A1 (en) 1978-05-19

Family

ID=9178993

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7631556A Withdrawn FR2368716A1 (en) 1976-10-20 1976-10-20 Electronic speedometer providing direct digital output - includes light and photocell separated by apertured rotating disc and supplying signal to pulse counting circuit

Country Status (1)

Country Link
FR (1) FR2368716A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2593127A1 (en) * 1986-01-22 1987-07-24 Pujo Jules Optical speed indicator for a motor vehicle
CN101813502A (en) * 2010-05-12 2010-08-25 深圳润昇科技有限公司 Reading method of electronic remote transmitting water meter using area array light source

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2593127A1 (en) * 1986-01-22 1987-07-24 Pujo Jules Optical speed indicator for a motor vehicle
CN101813502A (en) * 2010-05-12 2010-08-25 深圳润昇科技有限公司 Reading method of electronic remote transmitting water meter using area array light source

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Legal Events

Date Code Title Description
ST Notification of lapse