CN204228773U - A kind of conditioning circuit for rotary transformer for testing - Google Patents
A kind of conditioning circuit for rotary transformer for testing Download PDFInfo
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- CN204228773U CN204228773U CN201420093070.1U CN201420093070U CN204228773U CN 204228773 U CN204228773 U CN 204228773U CN 201420093070 U CN201420093070 U CN 201420093070U CN 204228773 U CN204228773 U CN 204228773U
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Abstract
The utility model discloses a kind of conditioning circuit for rotary transformer for testing, it is provided with inserting terminal and is connected with equipment under test, and this modulate circuit is made up of precision resistance, two analog multipliers and two shunt capacitances; Described precision resistance forms attenuation network; The shunt capacitance of a ground connection is respectively provided with at the connecting place of the output terminal of precision resistance and the input end of two analog multipliers.The utility model has the advantage points such as power consumption is little, volume is little, cost is low, flexible operation, suitability wide, test parameter covering is wide, is with a wide range of applications to the test of easy rotary transformer.
Description
Technical field
The utility model relates to test circuit, particularly a kind of conditioning circuit for rotary transformer for testing.
Background technology
Calibration and the test of current R/D (angular transition becomes digital signal) equipment are all realized by two kinds of methods:
Method one:
By the characteristic of special D/R (digital signal converts angle signal to) equipment simulating rotary transformer, export sinusoidal, cosine signal, be manually provided with test and the measurement of rotating speed of single angle.
Said method one, its defect is: the testing tool needing purchasing expensive, and purchase commodity, the maintenance expense of instrument are all very high, be not each company can both bear rise; And instrument itself is more enervated, under needing specific working environment, (such as laboratory, normal temperature, under normal pressure) could use; In addition due to the action need manual operation of instrument, for having thought that once complete test (from 0 ° to 359 °, stepping 0.01 °, needs human users 36000 times to such as test angle) needs the running time grown very much, operating personnel are required high, use inconvenience.
Method two:
By motor and different rotary transformers (document 1 " the permanent-magnet synchronous motor rotor position measurement circuit design based on rotary transformer ", Yuan Dengke, " motor is applied with control " 2009,36 (9)) be connected with equipment under test, control motor by the control system of motor and reach tach signal, the read value comparing setting value and equipment under test completes test;
By optical code wheel (document 2 " sunykatuib analysis of SX2700 monochromator grating sine mechanism corner repeatable accuracy and measurement ", Wu Kun, volume the 1st phase in " optical precision engineering " January the 18th in 2010) rotate and obtain an absolute angle position, produce an angle signal, the read value comparing setting value and equipment under test completes test.
Said method two, its defect is: need large power, electrically to carry out drive motor, needs large space to fix optical code wheel, needs the various parameters revision of adjustment adaptive, just can reach the parameter value of needs during each test; The technician of Electric Machine Control subject different from the action need of optical code wheel operates, and for a complete testing process, needs multiple Collaboration to operate.During for different measuring object, also need the optical code wheel of replacing different model or rotary transformer just can reach test request.
Summary of the invention
Technical problem to be solved in the utility model is: for overcoming above-mentioned the deficiencies in the prior art, provides a kind of easy test, calibration auxiliary circuit, assists real rotary transformer to use to facilitate in Commissioning field use or laboratory.
The utility model solves the technical scheme that its technical matters adopts: this modulate circuit provides inserting terminal to be connected with equipment under test, and this modulate circuit is made up of precision resistance, two analog multipliers and two shunt capacitances; Described precision resistance forms attenuation network; The shunt capacitance of a ground connection is respectively provided with at the connecting place of the output terminal of precision resistance and the input end of two analog multipliers.
The model of described multi-function data acquisition card can be NI USB-6341.
Described modulate circuit can be made up of precision resistance, two analog multipliers and two shunt capacitances; Described precision resistance forms attenuation network; The shunt capacitance of a ground connection is respectively provided with at the connecting place of the output terminal of precision resistance and the input end of two analog multipliers; A railway digital signal in an analog multiplier and multi-function data acquisition card converts simulating signal to and has coordinated sinusoidal signal to export, and another railway digital signal in another analog multiplier and multi-function data acquisition card converts simulating signal to and coordinated cosine signal to export.
The model of described precision resistance can be LT5400.
The model of two described analog multipliers can be all AD734.
Two described shunt capacitances all can adopt ceramic paster electric capacity.
The utility model compared with prior art has following main advantage:
The utility model can substantially substitute motor and rotary transformer uses with laboratory at the scene, relative to traditional test, need motor and rotary transformer, the utility model power consumption is little, volume is little, cost is low, flexible operation, suitability are wide, test parameter covers the features such as wide.Easy test is with a wide range of applications.
Utilize virtual instrument technique, use notebook computer to coordinate hand-held board can complete the test of various function.Various operation completes on computers, during test also renewable parameter with the different test process of adaptation, operating personnel only need to click the test that " starting to test " can complete each function, amendment different parameters can adaptive different test request, reaches that power consumption is little, volume is little, cost is low, flexible operation, suitability wide, test parameter covers wide advantage.
The utility model for R/D equipment debugging or calibration use, the characteristic of different model rotary transformer is provided, simulation absolute angle and rotary speed information, being one testing tool easily and efficiently, is a kind of equipment having merged numerous advanced technologies such as electronics, sensor, computer software and hardware, virtual instrument.
The utility model and traditional method of testing performance comparison are in table 1.
Accompanying drawing explanation
Fig. 1 is the structural representation of rotary transformer.
Fig. 2 is the oscillogram that rotary transformer exports.
Fig. 3 is structured flowchart of the present utility model.
Fig. 4 is theory diagram of the present utility model.
Fig. 5 is host computer workflow diagram.
Fig. 6 is modulate circuit schematic diagram.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is further described.
The rotary transformer mimic channel for testing that the utility model provides, its System's composition as shown in Figure 3, is made up of computing machine, multi-function data acquisition card, modulate circuit.Computing machine exports angle signal by DA (digital signal converts simulating signal to), and by the work of modulate circuit simulation rotary transformer, provide angle signal, tach signal and incremental code signal, complete R/D testing of equipment.Wherein excitation signal is pumping signal, the sine wave signal of a normally 2K-20K is inputted by outside, after rotary transformer, exported by out secondary, output has two ports, and be sinusoidal output and cosine output respectively, the amplitude of two port outputs is identical, but phase 90 °, as shown in Figure 2.Wherein: computing machine is connected with multi-function data acquisition card by USB (USB (universal serial bus)), and multi-function data acquisition card is connected with modulate circuit by test cable, and modulate circuit provides inserting terminal to be connected with equipment under test.
Described computing machine can adopt common PC (PC) or notebook, use Windows as operating system, use LabView as developing instrument, by usb bus AD, DA by PC control multi-function data acquisition card inside, counter, Digital I/O work, with the control of the output and circuit-under-test that realize rotary transformer simulating signal.
Described multi-function data acquisition card uses NI USB-6341, and as shown in Figure 3, it is connected with computing machine by usb bus, is controlled by virtual instrument technique, and realize sinusoidal input, cosine inputs, and sees Fig. 6.This capture card technical parameter is: the analog input on 16 tunnels, sampling rate 500kS/s; 2 road modulating output, sampling rate 900kS/s; 24 railway digital IO (I/O).
The structure of described modulate circuit as shown in Figure 6, is made up of precision resistance R1, analog multiplier, shunt capacitance C1, C2, wherein: precision resistance R1 forms attenuation network; DA2 in analog multiplier U2 and multi-function data acquisition card has coordinated sinusoidal signal to export, and the DA1 in analog multiplier U3 and multi-function data acquisition card has coordinated cosine signal to export; Digital I/O provides static high level or low level control signal for equipment under test.Excitation signal is exported by R/D equipment, outputs signal and is generated by arithmetical circuit by the output of excitation signal and DA.Send into the input end of R/D equipment subsequently, by various communication interface, the digital value after reading and converting, comparison difference therebetween, judges whether the functional parameter of tested R/D equipment meets the requirements.
The model of described precision resistance R1 is LT5400.
Described analog multiplier U2 and the model of analog multiplier U3 are AD734.
Described shunt capacitance C1, C2 can adopt ceramic paster electric capacity.
Described R/D equipment is unit under test (such as AD2S1210), can resolve angle signal, tach signal.
Described host computer is computing machine, and the test procedure established in it as shown in Figure 5, is made up of 4 test submodules, is single angle measurement module, continuously angle test module, measurement of rotating speed module, incremental code test module respectively.Independent between each module exist, and all needs to carry out corresponding configuration, complete the input of test condition when starting to test; After having tested, test result is deposited in a computer, as the input of generating report forms.
The rotary transformer mimic channel for testing that the utility model provides, its course of work is: the output signal of rotary transformer of reproduced analog on motor, comprises sine, cosine, incremental code output.These signals of R/D equipment use can complete the parsing of angle information, rotary speed information, incremental code information.Debugging or the calibration use of R/D equipment is completed by the comparison between settings and analytic value.By different optimum configurations, the output signal of the rotary transformer of various unlike signal can be simulated.
Angle Cleaning Principle: as shown in Figure 3, the reading of angle signal typically uses specific R/D conversion chip and realizes, and as the AD2S1210 of TI company, sine-wave oscillator able to programme on integration slice, for rotary transformer provides sine-wave excitation.The signal of the sine of conversion chip and the permission of cosine input end and excitation signal same frequency scope, information that is sinusoidal and cosine input end for following the tracks of input signal, and is converted to the digital quantity corresponding to input angle and speed by TypeII servo loop.
As shown in Figure 5, DA input signal enters modulate circuit to signal regulating panel schematic diagram, after signal attenuation conditioning, input analog multiplier; Export sinusoidal signal and cosine signal.
Computing machine is connected with one piece of multifunction card by USB, and by the driving establishment upper computer software of multifunction card, upper computer software has following several function, respectively, and the test of angle single, supervision follow-on test, measurement of rotating speed, incremental code test.
Angle single is tested: user inputs " settings (angle) ", click after " test ", DAQ is set and exports sinusoidal and cosine value, then by angle value that serial ports reading R/D chip collects, and calculation deviation, result is as the foundation of report generation.
Angle follow-on test: user inputs " initial (angle) ", " stepping (angle) ", " stop (angle) ", after clicking " test ", sine and the cosine value of DAQ continuous updating are set, then by the angle value that serial ports reading R/D chip collects, and calculation deviation, draw and read result and bias contribution, result is as the foundation of report generation.
Rotating speed follow-on test: user's input " settings (angle/point) ", " read value (angle/point) ", " deviation (angle/point) ", after clicking " test ", sine and the cosine value of DAQ continuous updating (1ms) are set, with 0.2 degree for stepping continuous increasing, back to zero after 360 degree, circulates successively.Then by the angle value that serial ports reading R/D chip collects, and calculation deviation, draw and read result and bias contribution, result is as the foundation of report generation.
Incremental code is tested: after hit testing, and simulation rotates the simulating signal that generation one is enclosed, and produce 2 NM signals, can read the signal of A XOR B in counting, such as, the resolution of 12 has 1024*2 pulses generation.In addition, for the RD chip of multistage logarithm, different numbers of pole-pairs can also be selected to test.
The utility model, relative to traditional testing apparatus and method, can complete complete test event by a machine, comprises single angle measurement, continuously angle measurement, measurement of rotating speed, incremental code test, and provide testing journal sheet at the end of test.Have that power consumption is little, volume is little, cost is low, flexible operation, suitability are wide, test parameter covers wide feature.
Subordinate list
Table 1 the utility model and prior art compare
| Content | The utility model patent | Prior art |
| Power consumption | Be no more than 100W | Thousands of W |
| Volume | Portable, be no more than 5 kilograms | More than 25 kilograms |
| Cost | Be no more than 1w Renminbi | More than 10W Renminbi |
| Operability | Be no more than 5 steps | According to different test events, maximum thousands of step |
| Test duration | Be no more than 10 minutes | More than 1 hour |
| Suitability | Can adaptive upper ten kinds of models | Come adaptive according to purchasing different sensors |
Claims (4)
1. the conditioning circuit for rotary transformer for testing, is characterized in that this modulate circuit provides inserting terminal to be connected with equipment under test, and this modulate circuit is made up of precision resistance, two analog multipliers and two shunt capacitances; Described precision resistance forms attenuation network; The shunt capacitance of a ground connection is respectively provided with at the connecting place of the output terminal of precision resistance and the input end of two analog multipliers.
2. the conditioning circuit for rotary transformer for testing according to claim 1, is characterized in that the model of described precision resistance is LT5400.
3. the conditioning circuit for rotary transformer for testing according to claim 1, is characterized in that the model of two described analog multipliers is AD734.
4. the conditioning circuit for rotary transformer for testing according to claim 1, is characterized in that two described shunt capacitances all adopt ceramic paster electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420093070.1U CN204228773U (en) | 2014-03-03 | 2014-03-03 | A kind of conditioning circuit for rotary transformer for testing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420093070.1U CN204228773U (en) | 2014-03-03 | 2014-03-03 | A kind of conditioning circuit for rotary transformer for testing |
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| Publication Number | Publication Date |
|---|---|
| CN204228773U true CN204228773U (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420093070.1U Expired - Fee Related CN204228773U (en) | 2014-03-03 | 2014-03-03 | A kind of conditioning circuit for rotary transformer for testing |
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| Country | Link |
|---|---|
| CN (1) | CN204228773U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107769630A (en) * | 2017-11-13 | 2018-03-06 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of permagnetic synchronous motor position decoding monitoring system |
-
2014
- 2014-03-03 CN CN201420093070.1U patent/CN204228773U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107769630A (en) * | 2017-11-13 | 2018-03-06 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of permagnetic synchronous motor position decoding monitoring system |
| CN107769630B (en) * | 2017-11-13 | 2020-09-22 | 中国航空工业集团公司西安航空计算技术研究所 | Permanent magnet synchronous motor position decoding monitoring system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150325 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |