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 roadInfo
- 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
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.
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)
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)
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 |
-
1977
- 1977-10-19 FR FR7731513A patent/FR2406815A1/en active Granted
Patent Citations (1)
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)
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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Legal Events
Date | Code | Title | Description |
---|---|---|---|
CL | Concession to grant licences | ||
ST | Notification of lapse |