CN201276130Y - Strain detection apparatus of axle counting system - Google Patents
Strain detection apparatus of axle counting system Download PDFInfo
- Publication number
- CN201276130Y CN201276130Y CNU2008201099654U CN200820109965U CN201276130Y CN 201276130 Y CN201276130 Y CN 201276130Y CN U2008201099654 U CNU2008201099654 U CN U2008201099654U CN 200820109965 U CN200820109965 U CN 200820109965U CN 201276130 Y CN201276130 Y CN 201276130Y
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- axle
- cpu
- resistance
- strain
- axle counting
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Abstract
Disclosed is an axle counting system strain detecting device with improved anti-interference effect, which adopts the technical proposal that the axle counting system strain detecting device is characterized in that the axle counting system strain detecting device comprises a power supply part, a measuring bridge part, a differential amplifier, a CPU, an axle counting signal input terminal, an axle counting signal output terminal, and an adjusting-testing serial port. The measuring bridge part, the differential amplifier and the CPU are sequentially connected; and the axle counting signal output terminal and the adjusting-testing serial port are respectively connected with the CPU. After the measurement by the bridge, differential amplification is performed to convert the resistance signals of the resistance measurement of a transversal strain plate and a vertical strain plate into voltage signals which are then converted into digital signals through AD conversion of the CPU.
Description
Technical field
The utility model belongs to railway axle counting system strain detecting field, especially a kind of axle counting system strain-Sensing device.Axle counting system is the signal that utilizes magnetic head sensor sensing train wheel process, judges the interval check system whether section has car to take.
Background technology
At present, axle counting system adopts magnetic head sensor sensing train wheel signal, detecting device detecting sensor magnetic head signal is transferred to the main frame of control center with the signal that detects by the meter shaft cable then, and software is judged the current car process that whether has by signal waveform in the main frame.
The problem that existing axle counting system detecting device exists is: when the construction of railways personnel hold spade and slip over the magnetic head sensor, easily magnetic head is differentiated whether car is arranged through causing interference, the interference problem of this metal object never is well solved.
Summary of the invention
The purpose of this utility model provides a kind of axle counting system strain-Sensing device that improves the disturbance rejection effect.
The technical solution of the utility model is: the axle counting system strain-Sensing device, it is characterized in that surveying serial ports by power unit, measuring bridge part, difference amplification, CPU and axle-counting signal input with axle-counting signal mouth, accent forms, measuring bridge part, difference are amplified and CPU is linked in sequence, the axle-counting signal mouth is surveyed serial ports with accent and is connected with CPU respectively, carry out difference after the bridge measurement and amplify, transfer mould the AD of voltage signal by CPU to the resistance signal of the measurement of resistance of strain-gauge and vertical strain-gauge and be converted to digital signal.
The circuit parallel that described power unit is made up of resistance R 4 and electric capacity E11, diode D3 and capacitor C 4 is in series, the measuring bridge part is formed in parallel by the circuit series of resistance R 5, resistance R 8 and the circuit series of resistance R 7 and resistance R 8, the difference amplifier section is made of chip LM158 and peripheral circuit thereof, CPU adopts chip DSPIC30F3012, and axle-counting signal input, axle-counting signal output and accent are surveyed serial ports and realized by chip MAX232A.
Effect of the present utility model is: wheel is through slipping over spade, it all is metal object, but its weight difference is apart from very big, adopt strain sensor, whether the current wave form varies of threshold value auxiliary judgment by strain is set is the wheel process, the interference that little metal objects such as spade cause the magnetic head sensor can be reduced to minimumly, improve the antijamming capability of axle counting system greatly.
The present invention is described further below in conjunction with drawings and Examples.
The drawing explanation
Fig. 1 is the circuit block diagram of axle counting system detection of electrons box of the present invention;
Fig. 2 a is an axle counting system detection of electrons box amplifier circuit schematic diagram of the present invention;
Fig. 2 b is an axle counting system detection of electrons box cpu circuit schematic diagram of the present invention;
Fig. 3 is a detection of electrons box CPU program flow chart of the present invention
Fig. 4 is an axle counting system embodiment block diagram of the present invention.
The specific embodiment
Among Fig. 1, the axle counting system strain-Sensing device, surveying serial ports by power unit, measuring bridge part, difference amplification, CPU and axle-counting signal input with axle-counting signal output, accent forms, measuring bridge part, difference are amplified and CPU is linked in sequence, the axle-counting signal mouth is surveyed serial ports with accent and is connected with CPU respectively, carry out difference after the bridge measurement and amplify, transfer mould the AD of voltage signal by CPU to the resistance signal of the measurement of resistance of strain-gauge and vertical strain-gauge and be converted to digital signal.
Among Fig. 2, the power unit of detection of electrons box is made up of resistance R 4, electric capacity E11, diode D3 and capacitor C 4, the measuring bridge part is made up of resistance R 5, resistance R 6, resistance R 7 and resistance R 8, the difference amplifier section is made of chip LM158 and peripheral circuit thereof, CPU adopts chip DSPIC30F3012, and axle-counting signal input, axle-counting signal output and accent are surveyed serial ports and realized by chip MAX232A.
Among Fig. 3, when electronics receives wave form varies when wheel sensor, not directly to enter meter axle program, but at first judged whether strain, to guarantee at first before judging strain whether strain sensor itself is normal, if strain sensor itself is fault then peel off the auxiliary judgment module, directly meter axle, and prompting watch keeper keeps in repair strain module, if strain sensor is normal, and detected strain at this moment, then enter a meter axle program, otherwise judge that this wave form varies is for disturbing.
Among Fig. 4, adopt the implementation method of strain detecting axle counting system, strain sensor is installed in below the opposite side rail with magnetic head sensor parallel position, the use jig is installed, then strain sensor is connected with the detection of electrons box respectively with the magnetic head sensor, again the detection of electrons box is connected with the monitoring main frame.
Principle of work of the present utility model: power unit is that input 24V is changed into 5V, this circuit is in order to satisfy on the communication board of in the future this circuit being installed, need be applicable to single 24V power supply, and be+the 5V power supply with the 24V power source conversion, be the power supply of CPU numerical portion, the simulation part still adopts the power supply of 24V power supply.
Carry out difference after the bridge measurement and amplify, transfer mould the AD of voltage signal by CPU to the resistance signal of the measurement of resistance of strain-gauge and vertical strain-gauge and be converted to digital signal.
Show for the size of measuring strain is timely, adopt accent to survey serial ports and carry out the upper computer demonstration.
The axle-counting signal input is that when axle-counting signal changed, whether CPU finds by interruption was axle-counting signal with the digital signal input of axle-counting signal,
Because the signal and the axle-counting signal of sensor may not be synchronous, leave input sensor signal in the circuit, meter axle input logic signal is handled by the GPIO mouth of CPU, obtain whether this meter axle is effective axle-counting signal, if have stress signal to produce so within a certain period of time, can axle-counting signal be exported axle-counting signal by the pressure sensor pic chip like this.
Claims (2)
1, axle counting system strain-Sensing device, it is characterized in that surveying serial ports by power unit, measuring bridge part, difference amplification, CPU and axle-counting signal input with axle-counting signal mouth, accent forms, measuring bridge part, difference are amplified and CPU is linked in sequence, the axle-counting signal mouth is surveyed serial ports with accent and is connected with CPU respectively, carry out difference after the bridge measurement and amplify, transfer mould the AD of voltage signal by CPU to the resistance signal of the measurement of resistance of strain-gauge and vertical strain-gauge and be converted to digital signal.
2, axle counting system strain-Sensing device according to claim 1, it is characterized in that the circuit parallel that described power unit is made up of resistance R 4 and electric capacity E11, diode D3 and capacitor C 4 is in series, the measuring bridge part is formed in parallel by the circuit series of resistance R 5, resistance R 8 and the circuit series of resistance R 7 and resistance R 8, the difference amplifier section is made of chip LM158 and peripheral circuit thereof, CPU adopts chip DSPIC30F3012, and axle-counting signal input, axle-counting signal output and accent are surveyed serial ports and realized by chip MAX232A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201099654U CN201276130Y (en) | 2008-08-26 | 2008-08-26 | Strain detection apparatus of axle counting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201099654U CN201276130Y (en) | 2008-08-26 | 2008-08-26 | Strain detection apparatus of axle counting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201276130Y true CN201276130Y (en) | 2009-07-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201099654U Expired - Fee Related CN201276130Y (en) | 2008-08-26 | 2008-08-26 | Strain detection apparatus of axle counting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201276130Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102161344A (en) * | 2010-12-27 | 2011-08-24 | 深圳思量微系统有限公司 | Track axle detection method based on stress variation |
| CN117208034A (en) * | 2023-10-07 | 2023-12-12 | 温州市铁路与轨道交通投资集团有限公司 | Two-out-of-two architecture axle counting equipment data processing method and device and axle counting equipment |
-
2008
- 2008-08-26 CN CNU2008201099654U patent/CN201276130Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102161344A (en) * | 2010-12-27 | 2011-08-24 | 深圳思量微系统有限公司 | Track axle detection method based on stress variation |
| CN117208034A (en) * | 2023-10-07 | 2023-12-12 | 温州市铁路与轨道交通投资集团有限公司 | Two-out-of-two architecture axle counting equipment data processing method and device and axle counting equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090722 Termination date: 20120826 |