CN110081804B - Device and method for detecting dynamic performance of relative position sensor of maglev train - Google Patents
Device and method for detecting dynamic performance of relative position sensor of maglev train Download PDFInfo
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- CN110081804B CN110081804B CN201910427462.4A CN201910427462A CN110081804B CN 110081804 B CN110081804 B CN 110081804B CN 201910427462 A CN201910427462 A CN 201910427462A CN 110081804 B CN110081804 B CN 110081804B
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- 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
- G01B7/003—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring position, not involving coordinate determination
Abstract
The invention discloses a relative position sensor dynamic performance detection device and method of a maglev train, wherein the relative position sensor in the disclosed device comprises a detection coil, the relative position sensor dynamic performance detection device of the maglev train comprises a test coil, an equivalent load, a controller and a performance detection unit, wherein: the controller sends a control signal to the equivalent load to change the equivalent load, so that the actual load in the test coil is changed; the test coil is arranged below the detection coil, the equivalent reactance of the detection coil is changed by the change of the actual load in the test coil, the voltage signals at the two ends of the detection coil are changed along with the change of the actual load, and the position and speed signals generated by the relative position sensor are sent to the performance detection unit; the performance detection unit processes the position and velocity signals to evaluate the performance and quality of the relative position sensor. The method can simply and conveniently simulate the running condition of the relative position sensor at various speeds and heights so as to improve the detection efficiency of the relative position sensor.
Description
Technical Field
The invention relates to the field of maglev trains, in particular to a device and a method for detecting the dynamic performance of a relative position sensor of a maglev train.
Background
The relative position sensor is an important component of a positioning and speed measuring system of the magnetic suspension train, and the running direction, the speed, the tooth space counting and the magnetic pole phase angle information of the train are obtained by measuring the relative position sensor. In order to ensure the engineering test and production of the relative position sensor and realize the synchronous traction control and safe operation of the magnetic suspension train, the operation state of the relative position sensor, particularly the information of the operation position, speed, direction and the like of the relative position sensor, needs to be accurately obtained in real time.
Fig. 1 is a schematic view of a conventional relative position sensor installation position. The relative position sensors 100 are installed at the ends of two end trains of the magnetic suspension train, and two are combined and installed at one side. The detection probe of the relative position sensor 100 faces the long stator tooth 001 slot 002, and the positional relationship between the installation position and the long stator is as shown in fig. 1. When the detection coil of the relative position sensor 100 is close to the long stator, the magnetic field excited by the detection coil is inevitably influenced by the silicon steel lamination of the long stator, thereby causing the change of the coil flux linkage. The detection coil magnetic linkage is influenced by the structure of the long stator tooth 001 groove 002, so that the equivalent inductance of the coil is changed. Therefore, the relationship can be used for detecting the tooth 001 slot 002 structure of the long stator to measure the position, which is the basic principle of measuring the position relative to the position sensor.
Before the relative position sensor is formally arranged in a train, the quality of the relative position sensor needs to be necessarily detected so as to ensure that the relative position sensor meets the requirement of a positioning speed measuring system. Secondly, the relative position sensor is exposed for a long time, and although a certain protection device is arranged, some faults may occur after the sensor works for a period of time due to the fact that the working environment is complex and severe. At this time, it is necessary to perform necessary maintenance and update on it in time.
At present, a mechanical method and a coil switching method are adopted for detecting the performance of the sensor.
The idea of the mechanical method is derived from the actual behavior of the relative position sensor. The mechanical method is divided into a mechanical translation method and a mechanical turntable method according to the working form. The mechanical translation method is characterized by more truly simulating the actual running condition of the train. The method lays a local long stator track, and reproduces the actual working condition by controlling the operation of a relative position sensor. The mechanical turret method utilizes a mechanical turret to simulate a long stator track. Different running speeds of the relative position sensor on the long stator track are simulated by setting different rotating speeds. Although both of the above two methods can simulate the operation of the relative position sensor more truly, the following disadvantages exist, taking the mechanical translation method as an example: firstly, the long stator track occupies a large space and cannot be laid for a long time, so that the running distance is limited. Secondly, the operation speed is limited based on the self limitation of the mechanical translation method, so that the condition that the relative position sensor operates at a higher speed is difficult to simulate.
The coil switching method is also based on the principle of equivalent inductance change of the sensor to realize the simulation of the output signal of the sensor. The coil switching method realizes the change of the equivalent load of the sensor by designing a plurality of groups of coils and utilizing devices such as a relay and the like. The coil switching method is characterized by simple electrical design and capability of detecting whether the sensor works or not to a certain extent. However, due to the limited switching speed of devices such as relays and the limited number of detection coils, the dynamic characteristics of the sensor under the height condition are difficult to simulate by the scheme, and the high-precision simulation of the sensor cannot be realized due to the relatively low resolution.
Therefore, how to simply and conveniently simulate the operation of the relative position sensor at various speeds and heights to improve the detection efficiency of the relative position sensor is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a device and a method for detecting the dynamic performance of a relative position sensor of a maglev train, which can simply and conveniently simulate the running condition of the relative position sensor at various speeds and heights so as to improve the detection efficiency of the relative position sensor.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides a maglev train's relative position sensor dynamic behavior detection device, relative position sensor includes detection coil, maglev train's relative position sensor dynamic behavior detection device includes test coil, equivalent load, controller and capability detection unit, wherein:
the controller sends a control signal to the equivalent load, and the equivalent load changes the size of the equivalent load according to the control signal, so that the size of the actual load in the test coil is changed;
the test coil is arranged below the detection coil of the relative position sensor, the equivalent reactance of the detection coil is changed by the change of the actual load in the test coil, the voltage signals at the two ends of the detection coil are changed along with the change of the actual load, and the position and speed signals generated by the relative position sensor are sent to the performance detection unit;
and the performance detection unit processes the signals according to the output position and speed of the relative position sensor and evaluates the performance and quality of the relative position sensor.
Preferably, the device further comprises a human-computer interaction unit and a computer, wherein:
the human-computer interaction unit is used for displaying equivalent load change according to a control signal sent by the controller; a user can input equivalent load change expected information through the man-machine interaction unit and send the equivalent load change expected information to the controller, and the controller receives the equivalent load change expected information and processes the equivalent load change expected information into a control signal and sends the control signal to the equivalent load;
the computer is used for displaying equivalent load change according to a control signal sent by the controller; a user can input equivalent load change expectation information through a computer and send the equivalent load change expectation information to the controller, and the controller receives the equivalent load change expectation information and processes the equivalent load change expectation information into a control signal and sends the control signal to the equivalent load.
Preferably, the test coils and the detection coils of the relative position sensor have a mapping relation in space, and are all four groups of 8-shaped coils, each group of coils is provided with at least one conducting wire, and the test coils and the detection coils of the detection coils correspond to each other in space up and down.
Preferably, the controller sends a time sequence control signal to the equivalent load, the equivalent load generates periodic discrete change according to the time sequence control signal, the four groups of test coils and the detection coil generate corresponding periodic change in mutual inductance, meanwhile, voltage amplitude values and phases at two ends of the detection coil generate periodic change, and position and speed signals generated by the relative position sensor are sent to the performance detection unit.
Preferably, the equivalent load is four groups of digital potentiometers which are respectively connected with four groups of coils of the testing coil in series.
Preferably, the controller sends the timing control signal specifically, the controller sends, to the registers of the four groups of digital potentiometers, control signals with periodically changing base values of the four groups of registers having the same resistance value and different base values at different heights.
Preferably, the controller sends the timing control signal specifically, the controller sends the control signal which changes according to different resistance values and different timing changes to the registers of the four groups of digital potentiometers.
Preferably, the performance detection unit processes position and speed signals output by the relative position sensor, compares the processed position and speed signals with preset values, and evaluates the performance and quality of the relative position sensor.
The device has the advantages of simple structure, accuracy and high efficiency, and can efficiently complete the detection and evaluation of the performance and quality of the relative position sensor. The actual state of the relative position sensor running at various speeds on the rail can be realized by changing the equivalent load change through the controller, and the actual state of the relative position sensor running at various speeds can be simulated. The relative position sensor is used for detecting and evaluating the relative position sensor through the relative position detection device during engineering production so as to ensure the performance and quality of the relative position sensor and ensure the safe operation of the magnetic suspension train.
The invention relates to a method for detecting the performance of a relative position sensor of a maglev train, which comprises the following steps:
step S100: the controller sends a control signal to the equivalent load, and the equivalent load changes the size of the equivalent load according to the control signal, so that the size of the actual load in the test coil is changed;
step S200: the testing coil is arranged below the detecting coil of the relative position sensor, the equivalent reactance of the detecting coil is changed by the change of the actual load in the testing coil, the voltage signals at the two ends of the detecting coil are changed along with the change of the actual load, and the position and speed signals generated by the relative position sensor are sent to the performance detecting unit;
step S300: the performance detection unit processes the output position and speed signals of the relative position sensor to evaluate the performance and quality of the relative position sensor.
Similarly, the detection method of the dynamic performance detection device of the relative position sensor of the magnetic-levitation train also has corresponding technical effects, and the corresponding purpose is realized.
Drawings
FIG. 1 is a schematic diagram of the operation of a conventional long-stator-track-based synchronous linear motor-driven relative position sensor system for a magnetic-levitation train;
FIG. 2 is a block diagram of a dynamic performance detection device for a relative position sensor of a maglev train according to the present invention;
FIG. 3 is an equivalent circuit diagram of a dynamic performance detection device for a relative position sensor of a maglev train according to the present invention;
FIG. 4 is a schematic diagram of the relative positions of the test coil of the device for detecting the dynamic performance of the relative position sensor of the maglev train according to the present invention shown in FIG. 2 and the detection coil of the relative position sensor;
FIG. 5 is a schematic structural diagram of a detection coil of the device for detecting the dynamic performance of the relative position sensor of a maglev train according to the present invention;
fig. 6 is a structural block diagram of an equivalent load and a controller of the dynamic performance detection device of the relative position sensor of the maglev train provided by the invention.
FIG. 7 is a circuit diagram of a control circuit of a dynamic performance detection device for a relative position sensor of a maglev train according to the present invention;
FIG. 8 is a schematic diagram of the variation of levitation height of a relative position sensor during the operation of a magnetic levitation train on a track;
FIG. 9 is a schematic diagram showing changes in pitch angle of a relative position sensor during the operation of a maglev train on a track;
FIG. 10 is a schematic diagram of the yaw angle variation of the relative position sensor during the on-track operation of a magnetic levitation train;
FIG. 11 is a flow chart of a method for detecting the performance of a relative position sensor of a maglev train according to the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention is further described in detail below with reference to the accompanying drawings.
Referring to fig. 2, fig. 2 is a structural block diagram of a dynamic performance detection device for a relative position sensor of a maglev train provided by the maglev train of the present invention.
The utility model provides a maglev train's relative position sensor dynamic behavior detection device, relative position sensor 100 includes detection coil 200, maglev train's relative position sensor dynamic behavior detection device includes test coil 300, equivalent load 400, controller 500 and performance detecting element 800, wherein: the controller 500, the equivalent load 400 and the test coil 300 are sequentially connected, the test coil 300 is arranged below the relative position sensor 100, the test coil 300 and the detection coil 200 of the relative position sensor 100 generate a mutual induction effect, and the relative position sensor 100 is connected with the performance detection unit 800.
The controller 500 sends a control signal to the equivalent load 400, and the equivalent load 400 changes the size of the equivalent load according to the control signal, so as to change the size of the actual load in the test coil 300;
the test coil 300 is arranged below the detection coil 200 of the relative position sensor 100, the equivalent reactance of the detection coil 200 is changed by the change of the actual load in the test coil 300, the voltage signals at two ends of the detection coil 200 are changed accordingly, and the generated position and speed signals of the relative position sensor 100 are sent to the performance detection unit 800;
the performance detection unit 800 processes the output position and velocity signals of the relative position sensor 100 to evaluate the performance and quality of the relative position sensor 100.
The controller 500 controls the equivalent load 400 to change, the equivalent load 400 changes and changes the actual load of the test coil 300, so that the equivalent reactance of the detection coil 200 of the relative position sensor 100 is changed, the resonance state of the detection coil 200 is changed, the amplitude and the phase of the output voltage at the two ends of the detection coil 200 are changed along with the change of the equivalent reactance, and the relative position sensor 100 generates corresponding speed and position signals, so that the actual state of the relative position sensor running at various speeds in the orbit can be simulated. The performance detection unit 800 processes the position and velocity signals output from the relative position sensor 100, and detects and evaluates the performance and quality of the relative position sensor 100.
The device simple structure, it is accurate high-efficient, can accomplish the detection and the aassessment to relative position sensor performance and quality high-efficiently. The actual state of the relative position sensor running at various speeds on the rail can be realized by changing the equivalent load change through the controller, and the actual state of the relative position sensor running at various speeds can be simulated. The relative position sensor is used for detecting and evaluating the relative position sensor through the relative position detection device during engineering production so as to ensure the performance and quality of the relative position sensor and ensure the safe operation of the magnetic suspension train.
In a further aspect, the apparatus further includes a human-computer interaction unit and a computer, wherein:
the human-computer interaction unit 600 is configured to display a change of the equivalent load 400 according to a control signal sent by the controller 500; a user can input the equivalent load change expectation information through the human-computer interaction unit 600 and send the equivalent load change expectation information to the controller 500, and the controller 500 processes the equivalent load change expectation information into a control signal and sends the control signal to the equivalent load 400;
the computer 700 is used for displaying the equivalent load 400 change according to the control signal sent by the controller 500; the user can input the equivalent load change expectation information through the computer 700 and send the equivalent load change expectation information to the controller 500, and the controller 500 receives the equivalent load change expectation information and processes the equivalent load change expectation information into a control signal and sends the control signal to the equivalent load 400.
Namely, the man-machine interaction unit 600 and the computer 700 can display the equivalent load change rule. The human-computer interaction unit 600 and the computer 700 can control the equivalent load 400 to change through inputting values and through the controller 500.
In a further aspect, the relative position sensor 100 is an inductive sensor, and further includes an analog signal processing unit and a digital signal processing unit. The detection coil 200, the analog signal processing unit and the digital signal processing unit are connected in sequence, and the digital signal processing unit is connected with the performance detection unit 800. When the resonance state of the detection coil 200 changes, the output voltage at the two ends of the detection coil 200 changes, and the analog signal processing unit and the digital signal processing unit process the voltage signal changed at the two ends of the detection coil 200 into an actual state simulating that the relative position sensor runs at various speeds in the orbit.
Referring to fig. 3, fig. 3 is an equivalent circuit diagram of a dynamic performance detection device of a relative position sensor of a maglev train provided by the maglev train of the present invention.
In the device for detecting the dynamic performance of the relative position sensor of the maglev train, which is provided by the invention, the relative position sensor 100, the test coil 300 and the equivalent load 400 are simplified into an equivalent circuit. In fig. 3, the left side is a relative position sensor 100 circuit, and the right side is a test coil 300, equivalent load 400 circuit, wherein the equivalent load 400 is simplified to a high frequency variable actual load reactance.
The controller 500 can control the periodic variation of the equivalent load 400, so that the actual load of the test coil 300 is changed, the equivalent reactance of the detection coil 200 is changed, the resonance state of the detection coil 200 is changed, the output voltage at the two ends of the detection coil 200 is changed, and the relative position sensor 100 processes and generates corresponding state information, thereby simulating the actual state of the relative position sensor running at various speeds in the rail.
The test coil, the detection coil of the relative position sensor, and the equivalent load will be further described below.
Referring to fig. 4 and 5, fig. 4 is a schematic diagram of a relative position between a test coil of the device for detecting dynamic performance of a relative position sensor of a maglev train according to the present invention shown in fig. 2 and a detection coil of the relative position sensor, and fig. 5 is a schematic diagram of a structure of a detection coil of the device for detecting dynamic performance of a relative position sensor of a maglev train according to the present invention.
The test coil 300 and the detection coil 200 of the relative position sensor 100 have a spatial mapping relationship, the test coil 300 and the detection coil 200 are four groups of 8-shaped coils, each group of coils has at least one conducting wire, and the test coil 300 and each group of coils of the detection coil 200 correspond to each other in space.
The detection coil 200 is composed of a detection coil group 201 and a detection coil group 202, and the detection coil group 201 and the detection coil group 202 respectively include two sets of symmetrical coils. The test coil 300 is composed of a test coil set 301 and a test coil set 302, and the test coil set 301 and the test coil set 302 respectively include two sets of symmetrical coils.
When the equivalent load 400 is changed, the actual load of the test coil 300 changes, the equivalent reactance of the detection coil 200 of the relative position sensor 100 changes under the effect of the mutual inductance, the resonance state of the detection coil 200 changes accordingly, and the output voltage at the two ends of the detection coil 200 changes accordingly, so as to simulate the movement of the relative position sensor on the track.
The four groups of test coils 300 may be rectangular, circular, elliptical, or any other shape, and each group of test coils may be formed by a composite method of stacking or arranging a plurality of wires.
The controller 500 sends a timing control signal to the equivalent load 400, and the equivalent load 400 generates periodic variation with higher resolution according to the timing control signal, so that any two groups of the four groups of the test coils 300 generate phase angle differences, and further the two groups of the corresponding test coils in the four groups of the detection coils 200 generate phase angle differences, even if the four groups of the test coils 300 and the detection coils 200 generate corresponding periodic variation in mutual inductance, the amplitude and the phase of the voltage signals at the two ends of the detection coils 200 generate periodic variation, and the generated position and speed signals of the relative position sensor 100 are sent to the performance detection unit 800 to simulate the movement of the relative position sensor on the track. That is, the controller 500 may control the variation timing of the equivalent load 400 to simulate the train operation state.
Preferably, the position and velocity signals generated by the relative position sensor 100 are not distinguished when sent to the performance detection unit 800.
For convenience of illustration, the controller 500 is used to control two sets of equivalent loads 400. The analog signal processing unit of the relative position sensor 100 generates a signal of a sine wave by the periodic variation of the equivalent load 400. The phase angle difference between two adjacent coils can be simulated by controlling the variation timing of the equivalent load 400 by the controller 500. For example, the detection signals generated by any two groups of coils of the relative position sensor 100 generate a phase angle difference of 90 °, and the equivalent load 400 changes of the test coil 300 corresponding to the two groups of coils may be differentiated by a quarter cycle in time sequence by the controller 500. The adjustment of the train running speed is achieved by changing the frequency of the change of the equivalent load 400 of the test coil 300 by means of the controller 500.
Referring to fig. 6, fig. 6 is a structural block diagram of an equivalent load and a controller of a dynamic performance detection device of a relative position sensor of a maglev train according to the present invention. The equivalent load 400 is four groups, i.e. equivalent loads 401, 402, 403 and 404 are respectively connected in series with four groups of coils of the testing coil.
The controller 500 generates a control signal with timing difference to drive four groups of equivalent loads 401, 402, 403 and 404 to change the actual loads of the four groups of coils of the test coil, so that the equivalent reactance of the four groups of coils of the detection coil 200 changes, the output voltages at the two ends of the four groups of coils of the detection coil 200 change accordingly, and the motion of the relative position sensor on the track is simulated more accurately.
The equivalent load 400 can select two different digital potentiometers, so that the requirements of high resolution under low-speed conditions and quick response under high-speed conditions can be compatible.
Referring to fig. 7 to 10, fig. 7 is a circuit diagram of a control circuit of a dynamic performance detection device for a relative position sensor of a maglev train according to the present invention, fig. 8 is a schematic diagram of a change in levitation height of the relative position sensor when the maglev train operates on a track, fig. 9 is a schematic diagram of a change in pitch angle of the relative position sensor when the maglev train operates on the track, and fig. 10 is a schematic diagram of a change in yaw angle of the relative position sensor when the maglev train operates on the track.
The equivalent load 400 is a digital potentiometer set, the digital potentiometer set is composed of four groups of digital potentiometers, and each digital potentiometer is internally provided with a control register RDAC. The controller 500 sends control signals with time sequence difference to the digital potentiometer registers RADC0 and RADC1 of the equivalent loads 401 and 402 corresponding to the test coil group 301 of the test coil 300 and the digital potentiometer registers RADC2 and RADC3 of the equivalent loads 403 and 404 corresponding to the test coil group 302 of the test coil 300, and the detection signals with the phase difference of 90 degrees obtained by simulating the relative position sensor 100 are obtained. The controller 500 sends control signals with different frequencies changing periodically to four sets of digital potentiometer registers of the equivalent load 400, and simulates different driving speeds of the relative position sensor 100.
The resistance R change relation of the digital potentiometer is as follows:
R＝(D/Dmax)×RAB+Rmin (1)
wherein: d is the value sent to the digital potentiometer register by the controller, namely the value of RADCi, i is 0,1,2,3, D is less than or equal to Rmax；RABIs the maximum resistance variation range of the digital potentiometer, RminMinimum resistance value of digital potentiometer, DmaxIs the register maximum of the digital potentiometer.
RminAnd DmaxDetermined internally by a digital potentiometer chip, DmaxThe larger the value RABThe smaller the resistance is, the higher the resolution of the change in resistance is. If the register is selected as a 8-bit digital potentiometer, Rmin＝75，Dmax256. In a further embodiment, the controller 500 generates control signals with periodically varying resistance values corresponding to the digital potentiometer registers corresponding to four groups of registers at the same height when the analog relative position sensor 100 operates on the rail according to the digital potentiometer registers RADC0, RADC1, RADC2 and RADC3 of the equivalent load 400, and the control signals simulate the suspension height variation occurring when the relative position sensor 100 operates on the rail and the train operates on the rail according to the different values of the digital potentiometer registers corresponding to the four groups of registers at different heights when the relative position sensor 100 operates on the rail. The table has a tableThe periodically varying control signal may be a sinusoidal signal. The method specifically comprises the following steps: the controller 500 sends control signals to enable the four groups of registers RDAC0, RDAC2, RDAC1 and RDAC3 to obtain detection signals with the phase difference of 90 degrees according to the simulated relative position sensor 100; the control signal is a signal which is continuously sent to a register of the digital potentiometer at a certain frequency to change the value of RADCi. The higher the frequency of the control signal, the faster the simulated train is running. The value of RADCi is changed according to equation (1) so that the resistance value of the resistor R of the equivalent load 400 is changed. As long as the controller sends RADCI values ranging from 0 to DmaxVaries in a sine function manner, the resistance value of the equivalent load is in a sine manner at Rmin～Rmin+RABTo change between. The values of RADCi are varied by the controller such that the resistances of the equivalent loads 401, 402, 403, 404, respectively, vary sinusoidally and in phase by 90 ° in sequence. The maximum peak value of the sinusoidal variation of the resistance of all the digital potentiometers of the equivalent load 400 is kept unchanged, and when the minimum peak value is reduced, the analog suspension height is reduced, and when the minimum peak value is increased, the analog suspension height is increased. The suspension height change of the relative position sensor when the magnetic suspension train runs on the track is referred to figure 8. The levitation height is B01 and the height is 10MM when the rail is operated ideally. The suspension height is B02 when the rail is not in ideal operation, and the height variation range is 0-20 MM.
In a further embodiment, the controller 500 generates control signals for the digital potentiometer registers RADC0, RADC1, RADC2 and RADC3 of the equivalent load 400, which are varied according to different resistances and different timings, so as to simulate the change of the pitch angle of the relative position sensor 100 during the on-rail operation. The method specifically comprises the following steps: the controller 500 sends control signals to enable four groups of registers RDAC0, RDAC2, RDAC1 and RDAC3 to sequentially have phase difference of 90 degrees; at the peak value, the maximum value of the sinusoidal variation of the resistance of all the digital potentiometers of the equivalent load 400 is kept unchanged, the minimum value is sequentially reduced or increased according to the sequence of RDAC0, RDAC2, RDAC1 and RDAC3, the larger the difference value is, the larger the pitch angle is, and the variation of the pitch angle of the relative position sensor when the magnetic-levitation train runs on the track is shown in a reference figure 9. The pitch angle is C01 and the angle is 0 ° when the rail is ideally operating. The pitch angle is C02 when the rail is not in ideal operation, and the angle change range is 0 to +/-10 degrees.
In a further embodiment, the controller 500 generates control signals for the digital potentiometer registers RADC0, RADC1, RADC2 and RADC3 of the equivalent load 400, which are varied according to different resistances and different timings, so as to simulate the change of the yaw angle of the relative position sensor 100 during the on-rail operation. The method specifically comprises the following steps: the controller 500 sends control signals to enable four groups of registers RDAC0, RDAC2, RDAC1 and RDAC3 to sequentially have phase difference of 90 degrees; at the peak, the maximum value of the sinusoidal variation of the resistance of all the digital potentiometers of the equivalent load 400 is kept constant, the minimum value satisfies that RDAC0 is equal to RDAC1, RDAC2 is equal to RDAC3, RDAC0 is not equal to RDAC2 and the larger the difference, the larger the yaw angle. The yaw angle change of the relative position sensor when the magnetic suspension train runs on the track is shown in figure 10. The yaw angle is D01 at the ideal operation of the rail, and the angle is 0 °. The yaw angle is D02 when the orbit is not in ideal operation, and the angle change range is 0 to +/-10 degrees.
The controller 500 sends the timing control signal specifically, the controller sends four sets of registers with the same resistance values according to the height matching to four sets of digital potentiometer registers of the equivalent load 400 according to the speed and precision requirements, and selects a low-resolution fast potentiometer under the high-speed condition and a high-resolution digital potentiometer under the low-speed condition.
In a further embodiment, the performance detection unit 800 processes the output voltage signal of the relative position sensor 100 and then compares the processed output voltage signal with a preset value, so as to obtain the performance and quality detection and evaluation of the relative position sensor 100.
Firstly, selecting a relative position sensor which has perfect functionality and can accurately reflect the information of the actual running speed, the actual running position and the like of the train in the running process as a reference, placing the sensor into a detection device, acquiring an output signal, finishing the output signal to obtain a preset value, and implanting the preset value into an evaluation system of the detection device as a proposed standard. Then, by taking the preset value as a preset value, other relative position sensors are judged through comparative analysis.
The establishment of the preset value is the basis of detection, and in order to effectively detect the relative position sensor, a standard part is formed in advance, and the preset value is stored to guide the formation of the detection standard. Meanwhile, for each relative position sensor, before it is officially installed in a train, it is required to go through a process of detecting such a state to ensure the quality of the relative position sensor.
Referring to fig. 11, fig. 11 is a flowchart of a method for detecting performance of a relative position sensor of a maglev train according to the present invention.
A method for detecting the performance of a relative position sensor of a maglev train, the method comprising the steps of:
step S100: the controller sends a control signal to the equivalent load, and the equivalent load changes the size of the equivalent load according to the control signal, so that the size of the actual load in the test coil is changed;
step S200: the testing coil is arranged below the detecting coil of the relative position sensor, the equivalent reactance of the detecting coil is changed by the change of the actual load in the testing coil, the voltage signals at the two ends of the detecting coil are changed along with the change of the actual load, and the position and speed signals generated by the relative position sensor are sent to the performance detecting unit;
step S300: the performance detection unit processes the output position and speed signals of the relative position sensor to evaluate the performance and quality of the relative position sensor.
The controller controls the equivalent load to change, the equivalent load changes the actual load of the testing coil, so that the equivalent reactance of the detecting coil of the relative position sensor is changed, the resonance state of the detecting coil is changed, the output voltage at the two ends of the detecting coil changes along with the change of the equivalent load, and the relative position sensor generates corresponding speed and position signals, so that the actual state of the relative position sensor running at various speeds in the rail can be simulated. The performance detection unit processes the output position and speed signals of the relative position sensor and detects and evaluates the performance and quality of the relative position sensor.
The method is simple, accurate and efficient, and can efficiently complete detection and evaluation of the performance and quality of the relative position sensor. The actual state of the relative position sensor running at various speeds on the rail can be realized by changing the equivalent load change through the controller, and the actual state of the relative position sensor running at various speeds can be simulated. The relative position sensor is used for detecting and evaluating the relative position sensor through the relative position detection device during engineering production so as to ensure the performance and quality of the relative position sensor and ensure the safe operation of the magnetic suspension train.
The device and the method for detecting the dynamic performance of the relative position sensor of the magnetic-levitation train provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the core concepts of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (7)
1. The utility model provides a maglev train's relative position sensor dynamic behavior detection device, relative position sensor includes detection coil, its characterized in that, maglev train's relative position sensor dynamic behavior detection device includes test coil, equivalent load, controller and capability detection unit, wherein:
the test coils are arranged below the detection coils of the relative position sensor, the test coils and the detection coils of the relative position sensor have a spatial mapping relation and are four groups of 8-shaped coils, each group of coils is provided with at least one conducting wire, and the test coils and the detection coils of the detection coils correspond to each other in space up and down;
the controller sends a time sequence control signal to the equivalent load, the equivalent load generates periodic discrete change according to the time sequence control signal so that the actual load in the test coil generates corresponding periodic change, meanwhile, the equivalent reactance of the detection coil generates corresponding periodic change, the amplitude and the phase of the voltage signal at the two ends of the detection coil generate periodic change, and the position and speed signal generated by the relative position sensor is sent to the performance detection unit;
and the performance detection unit processes the signals according to the output position and speed of the relative position sensor and evaluates the performance and quality of the relative position sensor.
2. The apparatus for detecting the dynamic performance of a sensor in the relative position of a magnetic-levitation train as recited in claim 1, further comprising a human-computer interaction unit and a computer, wherein:
the human-computer interaction unit is used for displaying equivalent load change according to a control signal sent by the controller; a user can input equivalent load change expected information through the man-machine interaction unit and send the equivalent load change expected information to the controller, and the controller receives the equivalent load change expected information and processes the equivalent load change expected information into a control signal and sends the control signal to the equivalent load;
the computer is used for displaying equivalent load change according to a control signal sent by the controller; a user can input equivalent load change expectation information through a computer and send the equivalent load change expectation information to the controller, and the controller receives the equivalent load change expectation information and processes the equivalent load change expectation information into a control signal and sends the control signal to the equivalent load.
3. The apparatus according to claim 2, wherein the equivalent load is four sets of digital potentiometers, which are connected in series with four sets of coils of the testing coil respectively.
4. The device for detecting the dynamic performance of the relative position sensor of the magnetic-levitation train as claimed in claim 3, wherein the controller sends the timing control signal specifically, the controller sends the control signal with periodic variation to the registers of the four groups of digital potentiometers according to the same height, the same resistance value of the four groups of registers, and different base values of different heights.
5. The apparatus for detecting the dynamic performance of a sensor in a magnetic-levitation train as recited in claim 4, wherein the controller sends the timing control signal specifically, the controller sends the control signal which changes according to different resistance values and different timing changes to the registers of the four groups of digital potentiometers.
6. The device for detecting the dynamic performance of the relative position sensor of the magnetic-levitation train as recited in any one of claims 1 to 5, wherein the performance detection unit processes the position and speed signals output by the relative position sensor and compares the processed signals with preset values to evaluate the performance and quality of the relative position sensor.
7. A method for detecting the performance of a relative position sensor of a magnetic-levitation train is characterized by comprising the following steps:
step S100: the controller sends a control signal to the equivalent load, and the equivalent load changes the size of the equivalent load according to the control signal, so that the size of the actual load in the test coil is changed;
step S200: the test coils are arranged below the detection coils of the relative position sensor, the test coils and the detection coils of the relative position sensor have a spatial mapping relation and are four groups of 8-shaped coils, each group of coils is provided with at least one lead, and the test coils and the detection coils of the detection coils correspond up and down in space; the controller sends a time sequence control signal to the equivalent load, the equivalent load generates periodic discrete change according to the time sequence control signal so that the actual load in the test coil generates corresponding periodic change, meanwhile, the equivalent reactance of the detection coil generates corresponding periodic change, the amplitude and the phase of the voltage signal at the two ends of the detection coil generate periodic change, and the position and speed signal generated by the relative position sensor is sent to the performance detection unit;
step S300: the performance detection unit processes the output position and speed signals of the relative position sensor to evaluate the performance and quality of the relative position sensor.
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| CN112810666B (en) * | 2019-11-15 | 2023-02-10 | 比亚迪股份有限公司 | Train positioning and speed measuring method, equipment, system, computer equipment and storage medium |
| CN110907662A (en) * | 2019-11-29 | 2020-03-24 | 苏州长风航空电子有限公司 | Simulation test system for positioning and speed measuring device of high-speed maglev train |
| CN113126591A (en) * | 2020-01-16 | 2021-07-16 | 中车青岛四方机车车辆股份有限公司 | Test method and device for train controller |
| CN111638072A (en) * | 2020-06-12 | 2020-09-08 | 中车青岛四方机车车辆股份有限公司 | Maglev train dynamic performance test system |
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