CN206243200U - A kind of wheel detector for detecting rail vehicle - Google Patents
A kind of wheel detector for detecting rail vehicle Download PDFInfo
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- CN206243200U CN206243200U CN201621371622.6U CN201621371622U CN206243200U CN 206243200 U CN206243200 U CN 206243200U CN 201621371622 U CN201621371622 U CN 201621371622U CN 206243200 U CN206243200 U CN 206243200U
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Abstract
A kind of wheel detector for detecting rail vehicle, is related to a kind of railway wheel sensor.When solving train of the existing passive Magnetic sensor detection speed less than 5km/h, the degree of accuracy of testing result is low, and passive magnet steel itself has the defect that service life is low and adaptation low-speed performance is poor.It includes magnet, Hall effect device and current processing and amplifying circuit；Magnet and Hall effect device are encapsulated in a housing, and magnet is located at the lower section of Hall effect device, described housing is fixed on any one inner side of rail, magnet is used to provide magnetic field to Hall effect device, and current processing and amplifying circuit are used to be processed the electric current that Hall effect device is exported and Current amplifier.The utility model is mainly used in indicating wheel to pass through information.
Description
Technical field
The utility model is related to a kind of railway wheel sensor.
Background technology
At present, the wheel detector that railway is used is usually passive sensor, using permanent magnet plus induction coil system
Into also referred to as magnet steel.Its operation principle is, when the magnetic field that wheel is produced by permanent magnet, magnetic to be exposed to permanent magnet
Field produces the disturbance of change, and the magnetic flux being equivalent in magnet steel induced inside coil produces change, induction coil interior flux
Change will produce an induced electromotive force in coil, and its external presentation is to draw line end in coil two to form voltage difference.Wheel
Approaching magnet steel, reach magnet steel and away from magnet steel during, produce an approximate single sinusoidal week at the two ends of induction coil
The pulse signal of phase signal, the pulse signal is the wheel being detected when wheel passes through by signal.Induced signal it is big
Small related to the speed of flux change in coil, flux change is faster, and the induced voltage produced in coil is bigger, flux change
Slower, the induced voltage produced in coil is just smaller.The speed of flux change is determined by the speed that wheel passes through, thus works as train
Quickly through when, passive Magnetic sensor can produce the instruction that good pulse signal passes through as wheel.But, work as train
By speed it is very low when, less than 5km/h, the pulse signal produced by this method will be very faint, in actual applications
Through can not correctly indicate wheel to pass through information.
Additionally, the permanent magnetism of passive magnet steel, also can over time, to wheel by the remagnetization of part
Gradually decay, thus although passive magnet steel has the advantages that to exempt from power supply, but there is service life and to adapt to low-speed performance poor
Inherent shortcoming.Meanwhile, there is also intrinsic contradictions between the anti-interference of passive magnet steel and sensitivity.
Utility model content
The utility model is the detection in order to solve during train of the existing passive Magnetic sensor detection speed less than 5km/h
The degree of accuracy of result is low, and passive magnet steel itself has the defect that service life is low and adaptation low-speed performance is poor.Therefore, this practicality
It is new there is provided a kind of wheel detector.
A kind of wheel detector for detecting rail vehicle, it include magnet, Hall effect device and current processing and
Amplifying circuit；
Magnet and Hall effect device are encapsulated in a housing, and magnet is located at the lower section of Hall effect device, described
Housing be fixed on any one inner side of rail,
Magnet is used to provide magnetic field to Hall effect device,
Current processing and amplifying circuit are used to be processed the electric current that Hall effect device is exported and Current amplifier.
Described current processing and amplifying circuit include resistance R1, resistance R2, resistance R3, resistance R4, PNP type triode and
Binding post；
The current output terminal of described Hall effect device is connected with one end of resistance R1, the other end of resistance R1 simultaneously with
One end of resistance R2 and the base stage of PNP type triode, the other end of resistance R2, the colelctor electrode of PNP type triode and power supply VCC are same
When connect,
The colelctor electrode of PNP type triode is connected with one end of resistance R3, and the other end of resistance R3 connects with one end of resistance R4
Connect, another termination power ground GND of resistance R4；
The other end of the positive source, power cathode and resistance R3 of Hall effect device respectively with 3 of binding post ends
Son connection.
Described Hall effect device is realized using SS441A cake cores.
A kind of wheel detector for detecting rail vehicle described in the utility model is arranged on rail, when vehicle car
When wheel is by its sensor mounting location, pulse signal can be produced.
The beneficial effect that the utility model brings is, a kind of wheel for detecting rail vehicle described in the utility model
Sensor is active device, and it uses active device Hall effect device to sense flux change, and this kind of flux of magnetic induction device is used
Long lifespan, and when the wheel detector for detecting rail vehicle described in the utility model, row of the detection speed less than 5km/h
Che Shi, can be processed and be amplified to detection signal, and accuracy in detection is high, and the degree of accuracy of testing result improves more than 30%.
Brief description of the drawings
Fig. 1 is the principle schematic of current processing described in the utility model and amplifying circuit.
Specific embodiment
Specific embodiment one：A kind of wheel detector for detecting rail vehicle described in present embodiment, it is wrapped
Include magnet, Hall effect device U1 and current processing and amplifying circuit；
Magnet and Hall effect device U1 are encapsulated in a housing, and magnet is located at the lower section of Hall effect device U1,
Described housing is fixed on any one inner side of rail,
Magnet is used to provide magnetic field to Hall effect device U1,
Current processing and amplifying circuit are used to be processed the electric current that Hall effect device is exported and Current amplifier.
In present embodiment, magnet and Hall effect device U1 are arranged near track, and magnet is used to give Hall effect device
Part U1 provides magnetic field, so that train wheel changes the magnetic field in the Hall effect device U1, to produce wheel to indicate letter
Number (i.e.：Current signal)；Current processing and amplifying circuit, for receiving wheel indication signals from the Hall effect device U1,
And output signal is produced in response to wheel indication signals.
Active device Hall effect device U1, for sensing flux change, this kind of flux of magnetic induction are used in the utility model
Device long service life, and when the wheel detector for detecting rail vehicle described in the utility model, detection speed is less than
During the train of 5km/h, detection signal can be processed and amplified, accuracy in detection is high, and the degree of accuracy of testing result is deducted a percentage
More than 30%
When wheel passes through, it is followed successively by from top to bottom：Wheel --- Hall effect device U1 --- magnet, magnet and Hall
Effect device U1 is each attached in housing, and magnet attracts each other with wheel, and magnets magnetic fields intensity becomes big, is reached to magnets magnetic fields intensity
Trigger gate to Hall effect device U1 is prescribed a time limit, and Hall effect device U1 generates wheel indication signals (current signal).
Specific embodiment two：Present embodiment is illustrated referring to Fig. 1, described in present embodiment and specific embodiment one
A kind of difference for detecting the wheel detector of rail vehicle is that described current processing and amplifying circuit include resistance
R1, resistance R2, resistance R3, resistance R4, PNP type triode Q1With binding post J1；
The current output terminal of described Hall effect device U1 is connected with one end of resistance R1, and the other end of resistance R1 is simultaneously
One end and PNP type triode Q with resistance R21Base stage, the other end of resistance R2, PNP type triode Q1Colelctor electrode and power supply
VCC is connected simultaneously,
PNP type triode Q1Colelctor electrode be connected with one end of resistance R3, the other end of resistance R3 and one end of resistance R4
Connection, another termination power ground GND of resistance R4；
The other end of the positive source, power cathode and resistance R3 of Hall effect device U1 is respectively with the 3 of binding post J1
Individual terminal connection.
In present embodiment, resistance R1 resistances are 1.2K Ω, and resistance R1 is PNP type triode Q1The current limliting electricity of base stage
Resistance, makes PNP type triode Q1It is operated in saturation region.
Resistance R2 resistances are 5.6K Ω, and the resistance is pull-up resistor, plays stabilization, and PNP is usually ensured during no signal
Type triode Q1Cut-off.
Resistance R3 resistances are 1K Ω, and the resistance is output current limiting resistance, it is to avoid make PNP type triode Q1ICE electric current mistakes
Greatly.
Resistance R4 resistances are 56K Ω, and the resistance is load resistance.
Specific embodiment three：Present embodiment, present embodiment and the institute of specific embodiment one or two are illustrated referring to Fig. 1
A kind of difference for detecting the wheel detector of rail vehicle stated is that described Hall effect device U1 uses SS441A
Cake core is realized.
Present embodiment, when wheel is by sensor mounting location described in the utility model, Hall effect device
SS441A cake core magnetic flux changes, when magnetic flux is more than 115 Gauss, Hall effect device SS441A outputs electricity high
It is flat, when magnetic flux is less than 20 Gauss, Hall effect device SS441A output low levels, because SS441A cake cores are that electric current is defeated
Go out, be 20 milliamperes to the maximum, it is necessary to current signal is changed into voltage signal by amplification.
It is described in the utility model a kind of for detecting that it is above-mentioned that the circuit structure of the wheel detector of rail vehicle is not limited to
Concrete structure described in each implementation method, can also be the reasonable combination of the technical characteristic described in the respective embodiments described above.
Claims (3)
1. a kind of wheel detector for detecting rail vehicle, it is characterised in that it includes magnet, Hall effect device (U1)
With current processing and amplifying circuit；
Magnet and Hall effect device (U1) are encapsulated in a housing, and magnet is located at the lower section of Hall effect device (U1),
Described housing is fixed on any one inner side of rail,
Magnet is used to provide magnetic field to Hall effect device (U1),
Current processing and amplifying circuit are used to be processed the electric current that Hall effect device is exported and Current amplifier.
2. a kind of wheel detector for detecting rail vehicle according to claim 1, it is characterised in that described electricity
Stream process and amplifying circuit include resistance R1, resistance R2, resistance R3, resistance R4, PNP type triode (Q1) and binding post
(J1)；
The current output terminal of described Hall effect device (U1) is connected with one end of resistance R1, the other end of resistance R1 simultaneously with
One end of resistance R2 and PNP type triode (Q1) base stage, the other end of resistance R2, PNP type triode (Q1) colelctor electrode and electricity
Source VCC is connected simultaneously,
PNP type triode (Q1) colelctor electrode be connected with one end of resistance R3, the other end of resistance R3 connects with one end of resistance R4
Connect, another termination power ground GND of resistance R4；
The other end of the positive source, power cathode and resistance R3 of Hall effect device (U1) is respectively with the 3 of binding post (J1)
Individual terminal connection.
3. a kind of wheel detector for detecting rail vehicle according to claim 1 and 2, it is characterised in that described
Hall effect device (U1) realized using SS441A cake cores.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621371622.6U CN206243200U (en) | 2016-12-14 | 2016-12-14 | A kind of wheel detector for detecting rail vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621371622.6U CN206243200U (en) | 2016-12-14 | 2016-12-14 | A kind of wheel detector for detecting rail vehicle |
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| Publication Number | Publication Date |
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| CN206243200U true CN206243200U (en) | 2017-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621371622.6U Active CN206243200U (en) | 2016-12-14 | 2016-12-14 | A kind of wheel detector for detecting rail vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111483494A (en) * | 2020-05-28 | 2020-08-04 | 哈尔滨峰峰科技开发有限公司 | Anti-interference and high-precision intelligent railway axle counting equipment |
-
2016
- 2016-12-14 CN CN201621371622.6U patent/CN206243200U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111483494A (en) * | 2020-05-28 | 2020-08-04 | 哈尔滨峰峰科技开发有限公司 | Anti-interference and high-precision intelligent railway axle counting equipment |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 150090 35-2 building, hi tech Industrial Development Zone, Nangang District, Harbin, Heilongjiang Patentee after: HARBIN RAILWAY RESEARCH INSTITUTE TECHNOLOGY Co.,Ltd. Address before: 150090 35-2 building, hi tech Industrial Development Zone, Nangang District, Harbin, Heilongjiang Patentee before: HARBIN VEIC TECHNOLOGY Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201125 Address after: Room 501, building B2, Changyuan road international enterprise community, Wuqing Development Zone, Wuqing District, Tianjin Patentee after: Tianjin Harwick Technology Co.,Ltd. Address before: 150090 35-2 building, hi tech Industrial Development Zone, Nangang District, Harbin, Heilongjiang Patentee before: HARBIN RAILWAY RESEARCH INSTITUTE TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right |