GB1130194A - Device for detecting the presence in, or the passage through, a given place of metallic objects, more particularly vehicles - Google Patents
Device for detecting the presence in, or the passage through, a given place of metallic objects, more particularly vehiclesInfo
- Publication number
- GB1130194A GB1130194A GB4569966A GB4569966A GB1130194A GB 1130194 A GB1130194 A GB 1130194A GB 4569966 A GB4569966 A GB 4569966A GB 4569966 A GB4569966 A GB 4569966A GB 1130194 A GB1130194 A GB 1130194A
- Authority
- GB
- United Kingdom
- Prior art keywords
- detecting
- bridge
- passage
- circuit
- mode
- 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
- 239000004020 conductor Substances 0.000 abstract 3
- 239000002184 metal Substances 0.000 abstract 2
- 239000003990 capacitor Substances 0.000 abstract 1
- 230000001788 irregular Effects 0.000 abstract 1
- 230000003071 parasitic effect Effects 0.000 abstract 1
- 230000035515 penetration Effects 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L1/00—Devices along the route controlled by interaction with the vehicle or train
- B61L1/16—Devices for counting axles; Devices for counting vehicles
- B61L1/163—Detection devices
- B61L1/165—Electrical
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L1/00—Devices along the route controlled by interaction with the vehicle or train
- B61L1/16—Devices for counting axles; Devices for counting vehicles
- B61L1/167—Circuit details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
- G01V3/101—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils by measuring the impedance of the search coil; by measuring features of a resonant circuit comprising the search coil
- G01V3/102—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils by measuring the impedance of the search coil; by measuring features of a resonant circuit comprising the search coil by measuring amplitude
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Remote Sensing (AREA)
- Automation & Control Theory (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geophysics (AREA)
- Geophysics And Detection Of Objects (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
1,130,194. Detecting the presence of a metal body. COMPAGNIE GENERALE D'ELECTRONIQUE INDUSTRIELLE LEPAUTE. Oct. 12, 1966 [Oct. 12, 1965], No.45699/66. Heading G1N. [Also in Division G4] Apparatus for detecting the presence of a metal object in a given place or its passage therethrough comprises an A. C. bridge circuit incorporating an electromagnetic detecting loop 46 and a reference coil 43 and is characterised by having one or more insulated conductors (16), whose shape and dimensions are such that they undergo the same capacitance variations in relation to the surrounding medium as the detecting loop, connected to that arm of the bridge which contains the reference coil to provide compensation for temperature changes and penetration of moisture. Connection between the detecting loop and the bridge circiut may be through a two conductor screened cable (14), Fig. 1 (not shown), or a three conductor cable. As shown in Fig. 2, the bridge E is energized by an oscillator D and any out of balance signal is freed from parasitic r.f. by a capicitor 47 and passes through an amplifier F, having a negative feedback loop incorporating a variable rejector circuit, to a rectifier circuit, (diodes 67, 68). A switch 88 enables either the "passage" or the "presence" mode to be selected. Connection between c and d selects the "passage" mode; limiting diodes 74, 75 convert the varying signal (K) due to the irregular shape of the object (J) into a uniform square pulse (M) which is then differentiated by a capacitor 81, (N), amplified and passed to a Schmitt trigger circuit to control a relay 102. Connection between c and e selects the "presence" mode in which the rectified signal is fed directly to the Schmitt trigger circuit. A tuning indicator 78 is provided.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR34676A FR1469499A (en) | 1965-10-12 | 1965-10-12 | Device for detecting the presence or passage in a given place of metallic objects, in particular vehicles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1130194A true GB1130194A (en) | 1968-10-09 |
Family
ID=8590287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4569966A Expired GB1130194A (en) | 1965-10-12 | 1966-10-12 | Device for detecting the presence in, or the passage through, a given place of metallic objects, more particularly vehicles |
Country Status (6)
| Country | Link |
|---|---|
| BE (1) | BE687832A (en) |
| DE (1) | DE1524618A1 (en) |
| FR (1) | FR1469499A (en) |
| GB (1) | GB1130194A (en) |
| LU (1) | LU52125A1 (en) |
| NL (1) | NL6614277A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1538058A1 (en) * | 2003-12-01 | 2005-06-08 | Alcatel | Method and system of compensating variations in the voltage in the sending coil of a rail contact |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3721821A (en) * | 1970-12-14 | 1973-03-20 | Abex Corp | Railway wheel sensor |
| DE3538228A1 (en) * | 1985-10-24 | 1987-06-04 | Klaus Ebinger | METHOD FOR SEARCHING AND LOCATING INHOMOGENITIES, AND CIRCUIT ARRANGEMENT FOR CARRYING OUT THIS METHOD |
| DE102009007068A1 (en) | 2009-01-29 | 2010-08-12 | Siemens Aktiengesellschaft | wheel sensor |
-
1965
- 1965-10-12 FR FR34676A patent/FR1469499A/en not_active Expired
-
1966
- 1966-10-05 BE BE687832D patent/BE687832A/xx unknown
- 1966-10-06 DE DE19661524618 patent/DE1524618A1/en active Pending
- 1966-10-07 LU LU52125D patent/LU52125A1/xx unknown
- 1966-10-11 NL NL6614277A patent/NL6614277A/xx unknown
- 1966-10-12 GB GB4569966A patent/GB1130194A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1538058A1 (en) * | 2003-12-01 | 2005-06-08 | Alcatel | Method and system of compensating variations in the voltage in the sending coil of a rail contact |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1524618A1 (en) | 1970-08-13 |
| BE687832A (en) | 1967-04-05 |
| LU52125A1 (en) | 1968-05-07 |
| FR1469499A (en) | 1967-02-17 |
| NL6614277A (en) | 1967-04-13 |
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