FR2406815A1 - Vehicle speed and weight determining appts. - utilises magnetic loop and piezoelectric sensors placed across road - Google Patents

Vehicle speed and weight determining appts. - utilises magnetic loop and piezoelectric sensors placed across road

Info

Publication number
FR2406815A1
FR2406815A1 FR7731513A FR7731513A FR2406815A1 FR 2406815 A1 FR2406815 A1 FR 2406815A1 FR 7731513 A FR7731513 A FR 7731513A FR 7731513 A FR7731513 A FR 7731513A FR 2406815 A1 FR2406815 A1 FR 2406815A1
Authority
FR
France
Prior art keywords
road
appts
vehicle speed
magnetic loop
piezoelectric sensors
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
FR7731513A
Other languages
French (fr)
Other versions
FR2406815B1 (en
Inventor
Murielle Gloaguen
Michel Munoz
Robert Verdier
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.)
Etat Francais
Original Assignee
Etat Francais
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 Etat Francais filed Critical Etat Francais
Priority to FR7731513A priority Critical patent/FR2406815A1/en
Publication of FR2406815A1 publication Critical patent/FR2406815A1/en
Application granted granted Critical
Publication of FR2406815B1 publication Critical patent/FR2406815B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
    • G01G19/02—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles
    • G01G19/022—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing wheeled or rolling bodies in motion
    • G01G19/024—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing wheeled or rolling bodies in motion using electrical weight-sensitive devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
    • G01G3/12—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
    • G01G3/13—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing having piezoelectric or piezoresistive properties

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

A piezoelectric sensor in the form of coaxial cable is placed across the road and generates a signal for electronic circuit to determine weight of a vehicle. With two sensors the number of axles can be counted and the speed of the vehicles determined. Two magnetic loops connected to a detector are located ahead of two cables in traffic direction. The cables are connected to detectors whose outputs pass via samplers to multiplexer and converter. A microprocessor controls samplers and multiplexer. Microprocessor processes sinals for recording and display.
FR7731513A 1977-10-19 1977-10-19 Vehicle speed and weight determining appts. - utilises magnetic loop and piezoelectric sensors placed across road Granted FR2406815A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7731513A FR2406815A1 (en) 1977-10-19 1977-10-19 Vehicle speed and weight determining appts. - utilises magnetic loop and piezoelectric sensors placed across road

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7731513A FR2406815A1 (en) 1977-10-19 1977-10-19 Vehicle speed and weight determining appts. - utilises magnetic loop and piezoelectric sensors placed across road

Publications (2)

Publication Number Publication Date
FR2406815A1 true FR2406815A1 (en) 1979-05-18
FR2406815B1 FR2406815B1 (en) 1982-04-09

Family

ID=9196706

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7731513A Granted FR2406815A1 (en) 1977-10-19 1977-10-19 Vehicle speed and weight determining appts. - utilises magnetic loop and piezoelectric sensors placed across road

Country Status (1)

Country Link
FR (1) FR2406815A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4539650A (en) * 1980-11-24 1985-09-03 Griffin Thomas D Mass calculating and indicating means for weighing moving vehicles
FR2575827A1 (en) * 1985-01-04 1986-07-11 France Etat Ponts Chaussees Method for measuring dynamic loads applied to a carriageway by road traffic
US4712423A (en) * 1985-01-04 1987-12-15 Laboratoire Central Des Ponts Et Chaussees Process and apparatus for measuring the dynamic loads applied to a highway by the road traffic
EP0491655A1 (en) * 1990-12-19 1992-06-24 K.K. Holding Ag System of force sensors, especially for dynamic determination of axial charge, speed, axial distance and total weight of vehicles

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2311928A1 (en) * 1973-03-09 1974-09-12 Pietzsch Ludwig MEASURING TRANSDUCER FOR DYNAMIC AXLE LOAD MEASUREMENT

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2311928A1 (en) * 1973-03-09 1974-09-12 Pietzsch Ludwig MEASURING TRANSDUCER FOR DYNAMIC AXLE LOAD MEASUREMENT

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4539650A (en) * 1980-11-24 1985-09-03 Griffin Thomas D Mass calculating and indicating means for weighing moving vehicles
FR2575827A1 (en) * 1985-01-04 1986-07-11 France Etat Ponts Chaussees Method for measuring dynamic loads applied to a carriageway by road traffic
US4712423A (en) * 1985-01-04 1987-12-15 Laboratoire Central Des Ponts Et Chaussees Process and apparatus for measuring the dynamic loads applied to a highway by the road traffic
EP0491655A1 (en) * 1990-12-19 1992-06-24 K.K. Holding Ag System of force sensors, especially for dynamic determination of axial charge, speed, axial distance and total weight of vehicles

Also Published As

Publication number Publication date
FR2406815B1 (en) 1982-04-09

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