GB1157082A - Improvements relating to Vehicle Detector Apparatus - Google Patents
Improvements relating to Vehicle Detector ApparatusInfo
- Publication number
- GB1157082A GB1157082A GB1986965A GB1986965A GB1157082A GB 1157082 A GB1157082 A GB 1157082A GB 1986965 A GB1986965 A GB 1986965A GB 1986965 A GB1986965 A GB 1986965A GB 1157082 A GB1157082 A GB 1157082A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- tuned
- amplifier
- wound
- bridge
- 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.)
- Expired
Links
- 230000001939 inductive effect Effects 0.000 abstract 2
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/042—Detecting movement of traffic to be counted or controlled using inductive or magnetic detectors
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/14—Traffic control systems for road vehicles indicating individual free spaces in parking areas
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
1,157,082. inductive proximity detectors. VENNER Ltd. July 12, 1966 [May 11, 1965], No.19869/65. Heading G1N. [Also in Division G4] The presence of a vehicle in a parking location is detected by the resulting change in inductance of a coil 8, situated just under the floor of the parking location, and connected into a normally balanced A.C. bridge, whose output is supplied to a tuned amplifier 19 and rectifying level detector 17. The tuned R.F. amplifier 19 may be a simple R.C. coupled amplifier incorporating a separate band-pass filter or may include a tuned negative feed back loop utilising an R.C. tuning circuit. The output from the level detector is applied to a Schmidt trigger circuit which drives the final output circuit 18, e.g. a relay. Temperature compensating elements may be incorporated in the inductive arms of the bridge, e.g. a non-inductively wound loop wound concentrically with the coil 8 in series with the coil 9 and a similarly wound coil in series with the coil 8. Further temperature compensation of the resistive arms is unnecessary if the resistors are matched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1986965A GB1157082A (en) | 1965-05-11 | 1965-05-11 | Improvements relating to Vehicle Detector Apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1986965A GB1157082A (en) | 1965-05-11 | 1965-05-11 | Improvements relating to Vehicle Detector Apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1157082A true GB1157082A (en) | 1969-07-02 |
Family
ID=10136541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1986965A Expired GB1157082A (en) | 1965-05-11 | 1965-05-11 | Improvements relating to Vehicle Detector Apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1157082A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996001461A1 (en) * | 1994-07-05 | 1996-01-18 | Universidad Complutense De Madrid | Magnetic device for detecting parked vehicles |
| WO2006082513A1 (en) * | 2005-02-07 | 2006-08-10 | Traficon Nv | Device for detecting vehicles and traffic control system equipped with a device of this type |
-
1965
- 1965-05-11 GB GB1986965A patent/GB1157082A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996001461A1 (en) * | 1994-07-05 | 1996-01-18 | Universidad Complutense De Madrid | Magnetic device for detecting parked vehicles |
| WO2006082513A1 (en) * | 2005-02-07 | 2006-08-10 | Traficon Nv | Device for detecting vehicles and traffic control system equipped with a device of this type |
| BE1016449A5 (en) * | 2005-02-07 | 2006-11-07 | Traficon Nv | DEVICE FOR DETECTING VEHICLES AND TRAFFIC CONTROL SYSTEM EQUIPPED WITH SUCH DEVICE. |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLE | Entries relating assignments, transmissions, licences in the register of patents | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |