CN108917572A - The system for eliminating magnetic displacement sensor burr phenomena in rail status monitoring - Google Patents
The system for eliminating magnetic displacement sensor burr phenomena in rail status monitoring Download PDFInfo
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- CN108917572A CN108917572A CN201810450903.8A CN201810450903A CN108917572A CN 108917572 A CN108917572 A CN 108917572A CN 201810450903 A CN201810450903 A CN 201810450903A CN 108917572 A CN108917572 A CN 108917572A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
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Abstract
The present invention provides a kind of systems for eliminating magnetic displacement sensor burr phenomena in rail status monitoring, whole system can be integrated on a fpga chip, module control is occurred by clock pulses and carries out data acquisition in different monitoring cycles per magnetic displacement sensor all the way, and format transformation and completes data in next monitoring cycle and exports.By above-mentioned design, can in strict control survey engineering time delay with it is synchronous, magnetic displacement measurement accuracy is set to only rely upon high speed, high stable, high-precision clock reference and algorithm for design, traditional analog magnetic displacement sensor is avoided to there is complicated, unstable, temperature drift when handling low level signal and need the problems such as calibrating, to greatly improve measurement accuracy.Since whole system is synchronized with a clock, logical sequence is synchronous in system, thus realize that multichannel data time-shared serial in different measurement periods exports, the generation that logic competition can be prevented, eliminate burr.
Description
Technical field
The invention belongs to railway operation monitoring technology field, in particular to a kind of elimination magnetic displacement sensor is in rail state
The system of burr phenomena when monitoring.
Background technique
With the fast development of high-speed rail technology, the mileage number that gapless rail is laid with quickly is lengthened, monitoring high-speed rail operation
Infrastructure-rail working condition caused the attention of railway department；It is needed in the monitoring of rail state same
When the measurement displacement of left and right rail, rail relative to the displacements of track plates, track plates relative to bridge plate displacement, with
And the arch of rail sink and waits displacements, needs high-precision multichannel while testing, required precision is better than 0.3 millimeter；At present preferably
Measurement method be that various displacements are measured using non-contacting magnetic displacement sensor.
Magnetostrictive displacement sensor (abbreviation magnetic displacement sensor) is by internal contactless observation and control technology, accurately
The absolute position of detection activity magnet ring measures the actual displacement value of detected product；The high-precision and high reliability of the sensor
It has been widely used in thousands of real case.
Keep measurement accurate, interrogation pulse electric current (initial pulse width) and strain-pulse electric current (stop pulse width) need
Want strict control；Early production is analogue type magnetic displacement sensor, and input signal is initial pulse, and output signal is with displacement
Change and the current or voltage signal of linear change；Modern age product is changed to cardinar number word input and output type, its working principle is that input
The initial signal of specific pulsewidth (1 microsecond), which is opened, counts gate, generates strain-pulse shaping at position magnet and exports specific pulsewidth
The stop signal of (1 microsecond), which is closed, counts gate, counts the gate opening time with high-frequency clock, count value N is multiplied by clock cycle T
(second) multiplied by the intrinsic waveguide coefficient X (meter per second) of magnetic displacement sensor, can obtain displacement：
L=N*T*X
Thus show that the measurement accuracy of numeric type magnetic displacement sensor only relies upon the precision of system clock T, because of waveguide
Given constant, N change with displacement when coefficient X is factory, and the frequency F=1/T of counting clock T is higher, and test displacement is differentiated
Rate is higher.
Existing magnetic displacement sensor control technology is mostly used A/D and acquires simulation output type magnetic displacement sensor, due to low level
The processing of direct current signal has that noise jamming, DC level drift etc. are difficult to overcome, and to reach positive and negative 10 microns of error
It is very difficult.Under conditions of 200 millimeters of measurement range, resolution ratio reaches 10 microns, needs the mould of 1/20000 resolution ratio
Quasi- minimum 1 millivolt of input voltage of number (A/D) converter (16bit), 20 volts of maximum input voltage, this not only adds circuits
Complexity and price, it is also difficult to reach positive and negative 10 microns of stability.For sensor with data readout magnetic displacement sensor, to reach high
Resolution ratio and precision, can only use programming device complete control because high speed microprocessor chip can not adjust timing, at present
On the market again without be higher than 200MHz counter (even if having, the interference of aerial lug, time delay are also difficult to realize high stability),
Even if using programmable array device, if circuit design is unreasonable, it is also difficult to reach high measurement accuracy.
Summary of the invention
In order to solve the above-mentioned technical problems, the present invention provides a kind of elimination magnetic displacement sensors in rail status monitoring
The system of burr phenomena.
Specific technical solution of the present invention is as follows：
The present invention provides a kind of system for eliminating magnetic displacement sensor burr phenomena in rail status monitoring, the systems
System is synchronized with a clock；The system comprises the following parts being successively electrically connected：
Module occurs for clock pulses, for sending the initial signal of acquisition monitoring data to the magnetic displacement sensor group 2
And stop signal, and reset signal is sent to the data outputting module at the end of monitoring cycle；
Magnetic displacement sensor group 2, including at least two magnetic displacement sensors, for according to the initial signal and described stopping
Stop signal is acquired the change in displacement data between bridge plate, track plates and rail；
Data outputting module, the data for acquiring to the magnetic displacement sensor group 2 carry out processing parallel series output；
The data outputting module includes at least two channel counters being successively electrically connected, the conversion of at least two formats
The quantity of device and a multiple selector, the channel counter and the format converter with the magnetic displacement sensor
Equal, channel counter described in each magnetic displacement sensor and only one is electrically connected, and each channel meter
Number device is connect with format converter described in only one；
The data that the channel counter is used to acquire the magnetic displacement sensor are handled；
The format converter is used to being converted to the processing result of the channel counter into the format convenient for output；
The multiple selector is used to carry out time-shared serial output to the transformation result of each format converter, and
The transformation result of a format converter is exported and only exported in each monitoring cycle.
Further, the magnetic displacement sensor, the channel counter and the format converter are 4, institute
It states multiple selector and selects a multiple selector for four.
Further, the magnetic displacement sensor is starting stop type magnetic displacement sensor.
Further, it includes the crystal oscillator being successively electrically connected and timing reference meter that module, which occurs, for the clock pulses
Number device, the crystal oscillator is for generating frequency of oscillation；
The timing reference counter is used to be converted to the frequency of oscillation initial pulse, is sent to the magnetic displacement biography
Sensor, and parsed according to the extraneous signal for inputting the magnetic displacement sensor group 2, constitute stop pulse and be sent to described
Magnetic displacement sensor, and reset signal is sent to the data outputting module at the end of monitoring cycle.
Further, the initial pulse and the stop pulse are the positive pulsewidth of 1 μ s.
Further, the initial pulse and after the initial pulse and it is adjacent with the initial pulse described in
The time interval of stop pulse is equal to the duration of the monitoring cycle.
Further, the timing reference counter is also used to control the count frequency and the lattice of the channel counter
The baud rate of formula converter, and the multiple selector is controlled in different monitoring cycles by each format converter
Transformation result time-shared serial output.
Further, the timing reference counter be using the system highest frequency as the maximum counter of clock, and
And the counting period of the maximum counter is not less than the monitoring range of the change in displacement.
Further, the processing result of the channel counter is converted to the serial of UART format by the format converter
Output data.
Further, the system integration is on a fpga chip.
Beneficial effects of the present invention are as follows：The present invention provides a kind of elimination magnetic displacement sensors in rail status monitoring
Whole system can be integrated on a fpga chip by the system of burr phenomena.In use, module occurs for clock pulses first
Start to acquire data by 1 magnetic displacement sensor of initial pulse control channel, and terminate pulse, control are generated according to input signal
1 magnetic displacement sensor of channel stops acquisition, terminates first monitoring cycle, and clock pulses generation module retransmits one at this time
Reset pulse, 1 channel counter of control channel temporarily latch 1 data of channel.Module occurs for clock pulses again to the second road magnetic
Displacement sensor sends initial pulse, and repeats the above steps, and 1 format converter of channel completes channel in the second detection cycle
The format of 1 data is converted and is exported by multiple selector.It so repeats the above steps, to the last a monitoring cycle
At the end of, then last circuit-switched data exported.Thus, it is possible to realize that multichannel data time-shared serial in different measurement periods is defeated
Out.
By above-mentioned design, can in strict control survey engineering time delay with it is synchronous, make magnetic displacement measurement accuracy only according to
Rely in high speed, high stable, high-precision clock reference and algorithm for design, it is low in processing to avoid traditional analog magnetic displacement sensor
There is complicated, unstable, temperature drift when level signal and needs the problems such as calibrating, to greatly improve measurement accuracy.Due to whole
A system is synchronized with a clock, therefore logical sequence is synchronous in system, to realize multichannel data in different measurement periods
Interior time-shared serial output, the generation that logic competition can be prevented, eliminate burr.
Detailed description of the invention
Fig. 1 is a kind of system for eliminating magnetic displacement sensor burr phenomena in rail status monitoring described in embodiment 1
Structural schematic diagram；
Fig. 2 is a kind of system for eliminating magnetic displacement sensor burr phenomena in rail status monitoring as described in example 2
Structural schematic diagram；
Fig. 3 is a kind of system for eliminating magnetic displacement sensor burr phenomena in rail status monitoring described in embodiment 3
Circuit structure diagram；
Fig. 4 is to eliminate the knot that magnetic displacement sensor is monitored in fixed displacement of the rail state to rail using this kind
Fruit；
Fig. 5 eliminates magnetic displacement sensor using this kind and is monitored in rail state to happy source bridge high-speed rail route
As a result.
Specific embodiment
Invention is further described in detail with following embodiment with reference to the accompanying drawing.
Embodiment 1
As shown in Figure 1, the present embodiment 1 provides a kind of elimination magnetic displacement sensor burr phenomena in rail status monitoring
System, the system is synchronized with a clock；The system comprises the following parts being successively electrically connected：
Module 1 occurs for clock pulses, for sending the initial signal of acquisition monitoring data to the magnetic displacement sensor group 2
And stop signal, and reset signal is sent to the data outputting module at the end of monitoring cycle；
Magnetic displacement sensor group 2, including at least two magnetic displacement sensors, for according to the initial signal and described stopping
Stop signal is acquired the change in displacement data between bridge plate, track plates and rail；
Data outputting module, the data for acquiring to the magnetic displacement sensor group 2 carry out processing parallel series output；
The data outputting module includes at least two channel counters 3 being successively electrically connected, at least two formats turn
The quantity of parallel operation 4 and a multiple selector 5, the channel counter 3 and the format converter 4 with the magnetic displacement
Sensor is equal, and channel counter 3 described in each magnetic displacement sensor and only one is electrically connected, and each described
Channel counter 3 is connect with format converter 4 described in only one；
The data that the channel counter 3 is used to acquire the magnetic displacement sensor are handled；
The format converter 4 is used to being converted to the processing result of the channel counter 3 into the format convenient for output；
The multiple selector 5 is used to carry out time-shared serial output to the transformation result of each format converter 4, and
And the transformation result of a format converter 4 is exported and only exported in each monitoring cycle.
In use, module 1, which occurs, for clock pulses sends initial pulse, control channel 1 to 1 magnetic displacement sensor of channel first
Magnetic displacement sensor starts to acquire data；Terminate pulse, control channel are generated according to the signal of 1 magnetic displacement sensor of input channel
1 magnetic displacement sensor stops acquisition, terminates first monitoring cycle, and module 1 occurs for clock pulses again to the counting of channel 1 at this time
Device sends a reset pulse, and 1 data of channel are temporarily latched.Clock pulses occurs module 1 and senses again to the second tunnel magnetic displacement
Device sends initial pulse, and repeats the above steps, and 1 format converter 4 of channel is in the second monitoring cycle by 1 data of channel at this time
It is converted into the format convenient for output, when the second detection cycle terminates, the second circuit-switched data is latched, multiple selector 5 will turn
Finish changing 1 data of the channel output of format.It if there are also other magnetic displacement sensors, then repeats the above steps, to the last a prison
When surveying end cycle, then last circuit-switched data is exported.Thus, it is possible to realize multichannel data timesharing in different measurement periods
Serial output.
By above-mentioned design, can in strict control survey engineering time delay with it is synchronous, make magnetic displacement measurement accuracy only according to
Rely in high speed, high stable, high-precision clock reference and algorithm for design, it is low in processing to avoid traditional analog magnetic displacement sensor
There is complicated, unstable, temperature drift when level signal and needs the problems such as calibrating, to greatly improve measurement accuracy.Due to whole
A system is synchronized with a clock, therefore logical sequence is synchronous in system, to realize multichannel data in different measurement periods
Interior time-shared serial output, the generation that logic competition can be prevented, eliminate burr.
Embodiment 2
As shown in Fig. 2, the present embodiment 2 provides a kind of elimination magnetic displacement sensor in rail on the basis of embodiment 1
The system of burr phenomena when status monitoring, the embodiment 2 further define the magnetic displacement sensor, the channel counter
3 and the format converter 4 be 4, the multiple selector 5 is four to select a multiple selector.Four tunnel magnetic displacement sensing
Device is respectively used between the displacement between the displacement between two bridge plates of measurement, bridge plate and track plates, left rail and track plates
Displacement and right rail and track plates between displacement, so as to carry out comprehensive monitoring to rail state.
The magnetic displacement sensor is starting stop type magnetic displacement sensor.
It includes the crystal oscillator 11 and timing reference counter being successively electrically connected that module 1, which occurs, for the clock pulses
12, the crystal oscillator 11 is active High Precision Crystal Oscillator, for generating frequency of oscillation；
The timing reference counter 12 is used to the frequency of oscillation being converted to initial pulse, is sent to the magnetic displacement
Sensor, and parsed according to the extraneous signal for inputting the magnetic displacement sensor group 2, constitute stop pulse and be sent to institute
Magnetic displacement sensor is stated, and sends reset signal to the data outputting module at the end of monitoring cycle.
The timing reference counter 12 be using the system highest frequency as the maximum counter of clock, and it is described most
Big counter counts monitoring range of the period not less than the change in displacement.For example, the displacement measurement of Reference Design of the present invention
Range is 500mm, and minimum clock cycle 4ns, 10 μm of maximum displacement (the corresponding displacement of a clock), counts are
500000 are equal to 50000 divided by 10, and the least count device more than this numerical value is 216Counter, maximum count value 65536,
Therefore select this counter as timing reference counter 12.
Standard is done using timing reference counter 12, compares the certain pulses of generation, such as in different moments as required
10 clocks generate the initial pulse (4ns*250=1000ns=1 μ s) of 1 μ s width, i.e., the described starting arteries and veins to the 260th clock
Punching and the stop pulse are the positive pulsewidth of 1 μ s.
The initial pulse and after the initial pulse and the stop pulse adjacent with the initial pulse
Time interval be equal to the monitoring cycle duration.
The timing reference counter 12 is also used to control count frequency and the format conversion of the channel counter 3
The baud rate of device 4, and the multiple selector 5 is controlled in different monitoring cycles by each format converter 4
The output of transformation result time-shared serial.
The UART that the processing result of the channel counter 3 is converted to 57600bit/s by the format converter 4 is (asynchronous
Communication) format SOD serial output data.
Embodiment 3
As shown in figure 3, the present embodiment 3 provides a kind of elimination magnetic displacement sensor in rail on the basis of embodiment 1
The system of burr phenomena when status monitoring, which further defines the system integration on a fpga chip, excellent
It is selected as XC3C50AN chip.
Application example 1
Using the system provided by the invention for eliminating magnetic displacement sensor burr phenomena in rail status monitoring, in room temperature
Under fixed displacement is measured for three days on end, as a result as shown in figure 4, measuring whole fluctuating error less than 10 μm, measurement result
Undulatory displacements are only positive and negative 1 clock cycle to fluctuate corresponding 20 μm of unique error, illustrate that this design can guarantee multichannel magnetic potential
The stability that displacement sensor measures simultaneously.
Application example 2
Using the system provided by the invention for eliminating magnetic displacement sensor burr phenomena in rail status monitoring, in Guangxi
It is used continuously 1 year on the high-speed rail route of Guilin happiness source bridge, left rail, right rail, track plates and bridge plate is supervised respectively
It surveys, data acquisition intervals are one hour primary.Fig. 5 provides the monitoring data from November 3rd, 2017 by 2 3rd, 2018,
It can be seen that the system really reflects the minor change (grade) that rail expands with heat and contract with cold with temperature from the smoothness of curve, such as
The left rail of fruit or right rail variance values are more than 40mm, it would be possible to there is a phenomenon where the buck of rail, broken rail, need that release is taken to arrange at this time
It applies, to ensure normal, the safe operation of the railway system.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of system for eliminating magnetic displacement sensor burr phenomena in rail status monitoring, which is characterized in that the system
It is synchronized with a clock；The system comprises the following parts being successively electrically connected：
Module (1) occurs for clock pulses, for sending the initial signal of acquisition monitoring data to the magnetic displacement sensor group (2)
And stop signal, and reset signal is sent to the data outputting module at the end of monitoring cycle；
Magnetic displacement sensor group (2), including at least two magnetic displacement sensors, for according to the initial signal and the stopping
Signal is acquired the change in displacement data between bridge plate, track plates and rail；
Data outputting module, for carrying out processing parallel series output to the data that the magnetic displacement sensor group (2) acquires；
The data outputting module includes at least two channel counters (3) being successively electrically connected, the conversion of at least two formats
The quantity of device (4) and a multiple selector (5), the channel counter (3) and the format converter (4) with it is described
Magnetic displacement sensor is equal, and channel counter (3) described in each magnetic displacement sensor and only one is electrically connected, and
Each channel counter (3) connect with format converter described in only one (4)；
The data that the channel counter (3) is used to acquire the magnetic displacement sensor are handled；The format converter
(4) for the processing result of the channel counter (3) to be converted to the format convenient for output；
The multiple selector (5) is used to carry out time-shared serial output to the transformation result of each format converter (4), and
And the transformation result of a format converter (4) is exported and only exported in each monitoring cycle.
2. the system for eliminating magnetic displacement sensor burr phenomena in rail status monitoring as described in claim 1, feature
It is, the magnetic displacement sensor, the channel counter (3) and the format converter (4) are 4, the multichannel
Selector (5) selects a multiple selector (5) for four.
3. the system for eliminating magnetic displacement sensor burr phenomena in rail status monitoring as claimed in claim 2, feature
It is, the magnetic displacement sensor is starting stop type magnetic displacement sensor.
4. the system for eliminating magnetic displacement sensor burr phenomena in rail status monitoring as described in claim 1, feature
It is, it includes the crystal oscillator (11) and timing reference counter being successively electrically connected that module (1), which occurs, for the clock pulses
(12), the crystal oscillator (11) is for generating frequency of oscillation；
The timing reference counter (12) is used to being converted to the frequency of oscillation into initial pulse, send out as the initial signal
The magnetic displacement sensor is given, and parsed according to the extraneous signal for inputting the magnetic displacement sensor group (2), constituted and stop
Only pulse and it is sent to the magnetic displacement sensor as the stop signal, and to the data at the end of monitoring cycle
Output module sends reset pulse as the reset signal.
5. the system for eliminating magnetic displacement sensor burr phenomena in rail status monitoring as claimed in claim 4, feature
It is, the initial pulse and the stop pulse are the positive pulsewidth of 1 μ s.
6. the system for eliminating magnetic displacement sensor burr phenomena in rail status monitoring as claimed in claim 5, feature
Be, the initial pulse and after the initial pulse and the stop pulse adjacent with the initial pulse when
Between interval be equal to the monitoring cycle duration.
7. the system for eliminating magnetic displacement sensor burr phenomena in rail status monitoring as claimed in claim 4, feature
It is, the timing reference counter (12) is also used to control the count frequency of the channel counter (3) and the format turns
The baud rate of parallel operation (4), and the control multiple selector (5) convert each format in different monitoring cycles
The transformation result time-shared serial of device (4) exports.
8. the system for eliminating magnetic displacement sensor burr phenomena in rail status monitoring as claimed in claim 4, feature
Be, the timing reference counter (12) be using the system highest frequency as the maximum counter of clock, and it is described most
Big counter counts monitoring range of the period not less than the change in displacement.
9. the system for eliminating magnetic displacement sensor burr phenomena in rail status monitoring as described in claim 1, feature
It is, the processing result of the channel counter (3) is converted to the Serial output number of UART format by the format converter (4)
According to.
10. the system for eliminating magnetic displacement sensor burr phenomena in rail status monitoring as described in claim 1, feature
It is, the system integration is on a fpga chip.
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| CN201810450903.8A CN108917572B (en) | 2018-05-11 | 2018-05-11 | System for eliminating burr phenomenon of magnetic displacement sensor during steel rail state monitoring |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810450903.8A CN108917572B (en) | 2018-05-11 | 2018-05-11 | System for eliminating burr phenomenon of magnetic displacement sensor during steel rail state monitoring |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101038151A (en) * | 2007-02-08 | 2007-09-19 | 北京航空航天大学 | Magnetostrictive displacement sensor |
| CN101788258A (en) * | 2010-03-04 | 2010-07-28 | 上海雷尼威尔测量技术有限公司 | Signal detecting circuit for magnetostrictive displacement sensor |
| CN206003088U (en) * | 2016-07-20 | 2017-03-08 | 蚌埠学院 | The multi-bus interface circuit of magnetostrictive displacement sensor |
| CN107430014A (en) * | 2015-03-09 | 2017-12-01 | 巴鲁夫公司 | Magnetostrictive displacement measuring apparatus and the method for running magnetostrictive displacement measuring apparatus |
-
2018
- 2018-05-11 CN CN201810450903.8A patent/CN108917572B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101038151A (en) * | 2007-02-08 | 2007-09-19 | 北京航空航天大学 | Magnetostrictive displacement sensor |
| CN101788258A (en) * | 2010-03-04 | 2010-07-28 | 上海雷尼威尔测量技术有限公司 | Signal detecting circuit for magnetostrictive displacement sensor |
| CN107430014A (en) * | 2015-03-09 | 2017-12-01 | 巴鲁夫公司 | Magnetostrictive displacement measuring apparatus and the method for running magnetostrictive displacement measuring apparatus |
| CN206003088U (en) * | 2016-07-20 | 2017-03-08 | 蚌埠学院 | The multi-bus interface circuit of magnetostrictive displacement sensor |
Non-Patent Citations (1)
| Title |
|---|
| 黄卉等: "磁致伸缩式扭转超声波位移传感器计时方法实现", 《电子测量技术》 * |
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