GB924869A - Apparatus for detecting displacement of a metallic part - Google Patents
Apparatus for detecting displacement of a metallic partInfo
- Publication number
- GB924869A GB924869A GB742660A GB742660A GB924869A GB 924869 A GB924869 A GB 924869A GB 742660 A GB742660 A GB 742660A GB 742660 A GB742660 A GB 742660A GB 924869 A GB924869 A GB 924869A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wheel
- relay
- train
- coils
- power amplifier
- 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
- 238000006073 displacement reaction Methods 0.000 title 1
- 238000004804 winding Methods 0.000 abstract 2
- 238000010276 construction Methods 0.000 abstract 1
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 230000007423 decrease Effects 0.000 abstract 1
- 230000008034 disappearance Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 239000011152 fibreglass Substances 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 239000004033 plastic Substances 0.000 abstract 1
- 229920001225 polyester resin Polymers 0.000 abstract 1
- 239000004645 polyester resin Substances 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
- B61L13/00—Operation of signals from the vehicle or by the passage of the vehicle
- B61L13/04—Operation of signals from the vehicle or by the passage of the vehicle using electrical or magnetic interaction between vehicle and track, e.g. by conductor circuits using special means or special conductors
- B61L13/047—Operation of signals from the vehicle or by the passage of the vehicle using electrical or magnetic interaction between vehicle and track, e.g. by conductor circuits using special means or special conductors controlling inductively or magnetically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
- B61L23/08—Control, warning or like safety means along the route or between vehicles or trains for controlling traffic in one direction only
- B61L23/12—Control, warning or like safety means along the route or between vehicles or trains for controlling traffic in one direction only partly operated by train
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Train Traffic Observation, Control, And Security (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
924,869. Transformers. SOC. INDUSTRIELLE DE LIAISONS ELECTRIQUE. March 2, 1960 [March 6, 1959; Feb. 22, 1960], No. 7426/60. Class 38 (2). [Also in Groups XXX and XXXVI] An E-shaped magnetic core carrying coils 1, 2, 3, Fig. 1, is mounted at the side of a railway line 6 to respond to the passage of a train wheel, coil 1 being energized from an oscillator and the difference in induced voltages in coils 2 and 3, which are arranged to differ in the absence of a wheel, being changed by the wheel presence to effect an indication of the train location. The output signal which drops to a minimum as the wheel covers the first gap rises to a maximum when the wheel covers the second, the intermediate normal level being achieved by physical asymmetry in the coil construction. A voltagewheel-position graph is described with reference to Fig. 4 (not shown), and measurement of the time intervals for the purpose of measuring train speed is discussed. To prevent actuation by each wheel the indicator (a relay) may stay locked in after the passage of the first wheel until such times as it is tripped by the first wheel reaching a point further along the track where another similar device or a mechanical trip switching arrangement may be located. In the circuit, Fig. 3, a relay R1 energized by the normal unbalance current is released when the voltage decreases at the approach of a wheel from X to energize a bell 14 and relays R2 and R5, the current path including contacts of relay R5 and an amplifier 12. The input circuit is thus broken as soon as relay R1 is operated. Relay R4 responds to a train moving in the opposite direction to energize a self-holding relay R3 which may operate a second indicator (not shown). An alternative four-coil arrangement embedded in a plastic polyester resin coated with an impregnated fibre glass 112, Fig. 11, whereby it can be secured adjacent a rail, has two pairs of coils mounted on separate U-shaped cores, one of which has extended limbs to provide the asymmetry. The coils of the transducers are energized by oscillators 127, 128, Fig. 12, and the outputs are applied via transistor pre-amplifier level-detectors 129, 130, and a common power amplifier 131, to control the energization of a bell 134 by a source 133. Two outputs A, B at different level from the preamplifier are applied to low level indicator 156, Fig. 14, and high level indicator 157, respectively, the former feeding a power amplifier through winding L3 and transformer T4, Fig. 15, and including in circuit a feed-back path through winding L3 and rectifier 174, to ensure a sharp cut-off when the normal unbalance signal is removed by the presence of a wheel. This cut-off results in the release of relay 132 to ring bell 134 and the removal of feed-back from a gating transistor 181 in the power amplifier input so that resumption of the normal current does not reoperate relay 132. Operation of the high-level indicator 157 by a train in the reverse direction store a voltage on condenser 177 to prevent the response of 156. This may be reoperated by a manually controlled switch 182, or automatically by a further similar unit along the track which provides an input to transformer T5 from its high level indicator 157. The two units can form a symmetrical arrangement for dealing with trains in both directions and in this case a second power amplifier and alarm bell will be necessary. The disappearance of unbalance current provides a foil-safe facility. In a modification, balanced transducers are used but their outputs are unbalanced by adjustment of their individual couplings with a transformer secondary coil. An enclosed concentrically wound transformer described with reference to Fig. 17 has a pair of usually adjustable cores to set the degree of asymmetry. The length of a metal body being passed through such an area may also be measured by measuring signal time intervals.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR788604A FR1230515A (en) | 1959-03-06 | 1959-03-06 | Device for detecting the displacement of a metal mass |
FR819229A FR77212E (en) | 1960-02-22 | 1960-02-22 | Device for detecting the displacement of a metal mass |
Publications (1)
Publication Number | Publication Date |
---|---|
GB924869A true GB924869A (en) | 1963-05-01 |
Family
ID=26183855
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB742660A Expired GB924869A (en) | 1959-03-06 | 1960-03-02 | Apparatus for detecting displacement of a metallic part |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE588205A (en) |
CH (1) | CH367202A (en) |
ES (1) | ES256178A1 (en) |
GB (1) | GB924869A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3281593A (en) * | 1962-06-27 | 1966-10-25 | Servo Corp Of America | Gate featuring pickup cancelling circuitry |
WO2008138860A1 (en) * | 2007-05-15 | 2008-11-20 | Siemens Aktiengesellschaft | Wheel sensor |
WO2011054646A1 (en) * | 2009-11-05 | 2011-05-12 | Siemens Aktiengesellschaft | Wheel sensor |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110641515B (en) * | 2019-09-18 | 2022-01-14 | 哈尔滨工程大学 | Axle counting magnetic head sensor |
-
1960
- 1960-03-01 ES ES0256178A patent/ES256178A1/en not_active Expired
- 1960-03-02 GB GB742660A patent/GB924869A/en not_active Expired
- 1960-03-02 BE BE588205A patent/BE588205A/en unknown
- 1960-03-03 CH CH240360A patent/CH367202A/en unknown
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3281593A (en) * | 1962-06-27 | 1966-10-25 | Servo Corp Of America | Gate featuring pickup cancelling circuitry |
WO2008138860A1 (en) * | 2007-05-15 | 2008-11-20 | Siemens Aktiengesellschaft | Wheel sensor |
WO2011054646A1 (en) * | 2009-11-05 | 2011-05-12 | Siemens Aktiengesellschaft | Wheel sensor |
Also Published As
Publication number | Publication date |
---|---|
ES256178A1 (en) | 1960-08-01 |
CH367202A (en) | 1963-02-15 |
BE588205A (en) | 1960-07-01 |
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