FR2257907A1 - Vehicle acceleration measurement device - records time elapsed during which velocity variation changes by fixed amount - Google Patents

Vehicle acceleration measurement device - records time elapsed during which velocity variation changes by fixed amount

Info

Publication number
FR2257907A1
FR2257907A1 FR7400487A FR7400487A FR2257907A1 FR 2257907 A1 FR2257907 A1 FR 2257907A1 FR 7400487 A FR7400487 A FR 7400487A FR 7400487 A FR7400487 A FR 7400487A FR 2257907 A1 FR2257907 A1 FR 2257907A1
Authority
FR
France
Prior art keywords
velocity variation
measurement device
fixed amount
time elapsed
vehicle acceleration
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
FR7400487A
Other languages
French (fr)
Other versions
FR2257907B3 (en
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.)
REDELEC
Original Assignee
REDELEC
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 REDELEC filed Critical REDELEC
Priority to FR7400487A priority Critical patent/FR2257907A1/en
Publication of FR2257907A1 publication Critical patent/FR2257907A1/en
Application granted granted Critical
Publication of FR2257907B3 publication Critical patent/FR2257907B3/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/17—Using electrical or electronic regulation means to control braking
    • B60T8/172—Determining control parameters used in the regulation, e.g. by calculations involving measured or detected parameters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
    • G01P15/001—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by measuring acceleration changes by making use of a triple differentiation of a displacement signal
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
    • G01P15/16—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by evaluating the time-derivative of a measured speed signal
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06G—ANALOGUE COMPUTERS
    • G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
    • G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
    • G06G7/18—Arrangements for performing computing operations, e.g. operational amplifiers for integration or differentiation; for forming integrals
    • G06G7/184—Arrangements for performing computing operations, e.g. operational amplifiers for integration or differentiation; for forming integrals using capacitive elements

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Software Systems (AREA)
  • Computer Hardware Design (AREA)
  • Time Recorders, Dirve Recorders, Access Control (AREA)

Abstract

A memory (C1) records the initial value of the velocity (Vo) at the commencement of the time measurement. A comparator (A2) provides the velocity variation (DELTA V) by subtracting the initial value (Vo) from the current value (V). A differential comparator (A3) determines the sign of the variation (DELTA V). A system (R) conveys the absolute value of the velocity variation (DELTA V) to a second comparator (A4) which compares this with a fixed reference value and initiates, via a bistable circuit (Bi), the stopping of the time measurement by counter (CH) when the two values are equal. A memory records the time measured in order to feed it to control and regulation equipment during the subsequent measurement operation. There is also a system of sequential command for the reading operations.
FR7400487A 1974-01-11 1974-01-11 Vehicle acceleration measurement device - records time elapsed during which velocity variation changes by fixed amount Granted FR2257907A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7400487A FR2257907A1 (en) 1974-01-11 1974-01-11 Vehicle acceleration measurement device - records time elapsed during which velocity variation changes by fixed amount

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7400487A FR2257907A1 (en) 1974-01-11 1974-01-11 Vehicle acceleration measurement device - records time elapsed during which velocity variation changes by fixed amount

Publications (2)

Publication Number Publication Date
FR2257907A1 true FR2257907A1 (en) 1975-08-08
FR2257907B3 FR2257907B3 (en) 1976-10-22

Family

ID=9133188

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7400487A Granted FR2257907A1 (en) 1974-01-11 1974-01-11 Vehicle acceleration measurement device - records time elapsed during which velocity variation changes by fixed amount

Country Status (1)

Country Link
FR (1) FR2257907A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0262602A2 (en) * 1986-09-26 1988-04-06 Sumitomo Electric Industries Limited In-gear vibration elimination system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0262602A2 (en) * 1986-09-26 1988-04-06 Sumitomo Electric Industries Limited In-gear vibration elimination system
EP0262602A3 (en) * 1986-09-26 1989-05-10 Sumitomo Electric Industries Limited In-gear vibration elimination system
US4875171A (en) * 1986-09-26 1989-10-17 Sumitomo Electric Industries, Ltd. Wheel speed control system incorporating in-gear vibration detection and elimination means

Also Published As

Publication number Publication date
FR2257907B3 (en) 1976-10-22

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Legal Events

Date Code Title Description
ST Notification of lapse