CN101319915A - Signal-number conversion method of rotating transformer - Google Patents
Signal-number conversion method of rotating transformer Download PDFInfo
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- CN101319915A CN101319915A CNA2008100221314A CN200810022131A CN101319915A CN 101319915 A CN101319915 A CN 101319915A CN A2008100221314 A CNA2008100221314 A CN A2008100221314A CN 200810022131 A CN200810022131 A CN 200810022131A CN 101319915 A CN101319915 A CN 101319915A
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Abstract
The invention relates to a signal-digit conversion method for a rotating transformer which is characterized by simultaneously carrying out digitle processing on the signals of the rotating transformers of a plurality of channels and converting a sine modulation signal Vs and a cosine modulation signal Vc outputted by the rotating transformer into a binary digit angle signals by the resolving method of a DSP digital signal processer. The invention consists of signal conditioning circuits, digital integrators, a clock oscillator and the DSP digital signal processer. Each rotating transformer channel is connected with one signal conditioning circuit; each signal conditioning circuit comprises two A/D convertors and a zero-crossing detector; each signal conditioning circuit is connected with one digital integrator; each digital integrator consists of two shift registers, two digital accumulators, two flip-latches and an address encoder. The measuring signal channel qualities of the conversion technology of the invention are more; the signal frequency range is broad; the digital angles are resolved by software, thus reducing the hardware cost, reducing the size and having a high cost performance.
Description
Technical field
The present invention belongs to technical field of sensor measurement, particularly a kind of signal-number conversion method of rotating transformer.
Background technology
Rotary transformer is the angular transducer that a kind of output signal voltage changes with angle of rotor, and it is mainly used in coordinate transform, triangulo operation and angle-data transmission.When reference winding during by the alternating voltage excitation of certain frequency, just, output voltage V s, the Vc of cosine winding become sinusoidal, cosine function relation with the rotational angle theta of rotor, relational expression is as follows:
Vs＝KEoSinωtSinθ
Vc＝KEoSinωtCosθ
Wherein, EoSin ω t is for exchanging reference signal, and K is a constant.
Rotary transformer has precision height, simple in structure as shaft angle displacement measurement element, and antijamming capability is strong, and it is abominable and the high occasion of accuracy requirement is compared with other angular transducer to be mainly used in environment, and rotary transformer is used for measurement of angle and has remarkable advantages.
1, on performance: because rotary transformer inside is without any electronic component, its vibration resistance, temperature tolerance, corrosion resistivity, anti-dust and aspects such as greasy dirt and anti-interference all have good performance, can adapt to the request for utilization of any environment, have high reliability.And photo-electric, raster pattern, magnetoelectric sensor inner integrated a lot of electronic devices and components, vibrated easily, life-span of temperature, corrosive gas, dust and greasy dirt and light source influences, its interference free performance is also not as rotary transformer.
2, from using: with the axis angle measurement system that rotary transformer is formed, it is wide to have working range, can directly transmit the displacement information of 360 ° of angles of circumference, and need not mechanically contact when long-distance transmissions information.Installation dimension selects the space big, can have from diameter 20mm～200mm, and physical dimension is not subjected to the influence of resolution; Easy to connect between sensor and the data processing section, only need 6 lines.
Rotary transformer is as the axis angle measurement element, for automatic control system provides highly reliable, high-precision position, displacement information sensing.Because rotary transformer output is a kind of ac modulation signal, in Industry Control, often need convert signals of rotating transformer to the digital angle signal, offers Computer Processing again.There is special-purpose R/D converter can realize that mould/number conversion and angle resolve function at present, but cost is higher, and can only finish the signals of rotating transformer-digital conversion of single passage, single-frequency, when the signals of rotating transformer that need finish a plurality of passages, multiple frequency simultaneously-digital conversion, adopt this method that the cost of whole measuring system, volume are increased along with the increase of port number and signal frequency kind, be unfavorable for promoting the use of of commercial measurement and control field, reduced cost performance of product.
Summary of the invention
Technical matters to be solved by this invention is the deficiency at existing method, proposes that a kind of volume is little, cost is low, hyperchannel, multifrequency signal-number conversion method of rotating transformer.
Technical matters to be solved by this invention is to realize by following technical scheme.The present invention is a kind of signal-number conversion method of rotating transformer, be characterized in, it carries out digitized processing to the signals of rotating transformer of several passages simultaneously, the method of resolving by the DSP digital signal processor again, rotary transformer output just, cosine modulation signal Vs, Vc convert the binary digit angle signal to;
It is become by signal conditioning circuit, digital integrator, clock oscillator and DSP bank of digital signal processors;
Each rotary transformer passage connects with a signal conditioning circuit, each signal conditioning circuit comprises two A/D converters and a zero-crossing detector, two A/D converters respectively with a rotary transformer passage output just, cosine modulation signal Vs, Vc convert to serial just, cosine digital signal SDs, SDc, export a serial-shift clock sclk simultaneously; Zero-crossing detector converts the interchange reference signal EoSin ω t of this passage to the digital reference signal FCLK and the output of same frequency;
Clock oscillator produces a master clock signal MCLK, and the A/D converter that offers in each signal conditioning circuit uses, the output of the sequential of control A/D converter and conversion back serial data;
Each signal conditioning circuit connects with a digital integrator, each digital integrator is by two shift registers, two digital accumulators, two latchs and an address decoder are formed, two shift registers are under the control of the serial-shift clock sclk of input, respectively just with the serial input, cosine digital signal SDs, SDc converts to and is just walking abreast, cosine digital signal PDs, PDc, send into two digital accumulators then respectively, digital accumulator is under the control of the digital reference signal FCLK of input, with just walking abreast in the one-period, cosine digital signal PDs, PDc adds up, accumulation result is sent into latch under the control of latch signal, just promptly be, the voltage effective value Vsin of cosine signal, Vcos;
The DSP digital signal processor connects with digital integrator by data/address bus, the DSP digital signal processor is sent address signal by address bus, decipher through address decoder, produce chip selection signal, enable the latch of each passage respectively, then by data bus read on each passage lock storage just, cosine signal voltage effective value Vsin, Vcos, call the arctan function storehouse of DSP digital signal processor again, pass through formula: θ=arctanVsin/Vcos calculates the digital angle θ of each passage.
In signal-number conversion method of rotating transformer of the present invention, rotary transformer passage number can be several, preferred 2-12.The frequency of the rotary transformer of each passage can be identical, also can be different, the preferred 50-5000Hz of its frequency range.
The circuit general function of switch technology of the present invention is to realize the conversion to digital angle of hyperchannel, multi-frequency signals of rotating transformer, its principle of work be by measure each passage just, the voltage effective value of cosine signal, and then adopt the method for arctan function to calculate digital angle, thereby realized the conversion of signals of rotating transformer to digital angle.It is divided into signal Processing and angle is resolved two parts, first is just realizing each passage with hardware circuit, the measurement of the voltage effective value of cosine signal, the signal processing circuit of each passage all is made up of a signal conditioning circuit and a digital integrator, wherein, each signal conditioning circuit all carries out signal sampling and mould/number conversion automatically under the control of same clock oscillator, need not the software control of DSP digital signal processor, the independence and the synchronism of multi channel signals voltage measurement have been guaranteed, data after the conversion are sent into corresponding digital integrator under the control of serial-shift clock sclk, each digital integrator is under the control of the digital reference signal of passage separately, automatically with in the digital cycle reference signal just, the cosine digital signal adds up, and accumulation result sent into latch, thereby just obtain, the voltage effective value of cosine signal, automatically change along with the cycle of digital reference signal integral time, need not the software control of DSP digital signal processor, therefore can adapt to the signals of rotating transformer of multiple frequency automatically; Second portion is just to utilize DSPDSP digital signal processor software basis, the voltage effective value of cosine signal calculates digital angle, the DSP digital signal processor is under the control of software, at first send address signal by address bus, decipher through address decoder, produce chip selection signal, enable the latch of each passage, just read on each passage lock storage by data bus then, the voltage effective value of cosine signal, call the arctan function storehouse again, pass through formula: θ=arctan (Vsin/Vcos), calculate the digital angle θ of each passage, because DSP has parallel data processing power at a high speed, the signals collecting and the calculating of a plurality of passages be can carry out simultaneously, real-time and accuracy that the hyperchannel angle is resolved guaranteed.
The major advantage of switch technology of the present invention is that the port number of measuring-signal is many, and signal frequency range is wide, owing to adopt software to resolve digital angle, has reduced hardware cost, has reduced volume, has high cost performance.
Description of drawings
Fig. 1 is the theory diagram of the technology of the present invention.
Fig. 2 is the signal conditioning circuit block diagram.
Fig. 3 is the digital integrator circuit block diagram.
Embodiment
Followingly further describe concrete technical scheme of the present invention,, and do not constitute restriction its right so that those skilled in the art understands the present invention further with reference to accompanying drawing.
Embodiment 1.With reference to Fig. 1-3.A kind of signal-number conversion method of rotating transformer, it carries out digitized processing to the signals of rotating transformer of several passages simultaneously, the method of resolving by the DSP digital signal processor again, rotary transformer output just, cosine modulation signal Vs, Vc convert the binary digit angle signal to;
It is become by signal conditioning circuit, digital integrator, clock oscillator and DSP bank of digital signal processors;
Each rotary transformer passage connects with a signal conditioning circuit, each signal conditioning circuit comprises two A/D converters and a zero-crossing detector, two A/D converters respectively with a rotary transformer passage output just, cosine modulation signal Vs, Vc convert to serial just, cosine digital signal SDs, SDc, export a serial-shift clock sclk simultaneously; Zero-crossing detector converts the interchange reference signal EoSin ω t of this passage to the digital reference signal FCLK and the output of same frequency;
Clock oscillator produces a master clock signal MCLK, and the A/D converter that offers in each signal conditioning circuit uses, the output of the sequential of control A/D converter and conversion back serial data;
Each signal conditioning circuit connects with a digital integrator, each digital integrator is by two shift registers, two digital accumulators, two latchs and an address decoder are formed, two shift registers are under the control of the serial-shift clock sclk of input, respectively just with the serial input, cosine digital signal SDs, SDc converts to and is just walking abreast, cosine digital signal PDs, PDc, send into two digital accumulators then respectively, digital accumulator is under the control of the digital reference signal FCLK of input, with just walking abreast in the one-period, cosine digital signal PDs, PDc adds up, accumulation result is sent into latch under the control of latch signal, just promptly be, the voltage effective value Vsin of cosine signal, Vcos;
The DSP digital signal processor connects with digital integrator by data/address bus, the DSP digital signal processor is sent address signal by address bus, decipher through address decoder, produce chip selection signal, enable the latch of each passage respectively, then by data bus read on each passage lock storage just, cosine signal voltage effective value Vsin, Vcos, call the arctan function storehouse of DSP digital signal processor again, pass through formula: θ=arctanVsin/Vcos calculates the digital angle θ of each passage.
Embodiment 2.In embodiment 1 described signal-number conversion method of rotating transformer, rotary transformer passage number is 2; The frequency of described rotary transformer is 50-5000Hz.
Embodiment 3.In embodiment 1 described signal-number conversion method of rotating transformer, rotary transformer passage number is 12; The frequency of described rotary transformer is 50-5000Hz.
Embodiment 4.In embodiment 1 described signal-number conversion method of rotating transformer, rotary transformer passage number is 6.
Claims (3)
1, a kind of signal-number conversion method of rotating transformer, it is characterized in that, it carries out digitized processing to the signals of rotating transformer of several passages simultaneously, the method of resolving by the DSP digital signal processor again, rotary transformer output just, cosine modulation signal Vs, Vc convert the binary digit angle signal to;
It is become by signal conditioning circuit, digital integrator, clock oscillator and DSP bank of digital signal processors;
Each rotary transformer passage connects with a signal conditioning circuit, each signal conditioning circuit comprises two A/D converters and a zero-crossing detector, two A/D converters respectively with a rotary transformer passage output just, cosine modulation signal Vs, Vc convert to serial just, cosine digital signal SDs, SDc, export a serial-shift clock sclk simultaneously; Zero-crossing detector converts the interchange reference signal EoSin ω t of this passage to the digital reference signal FCLK and the output of same frequency;
Clock oscillator produces a master clock signal MCLK, and the A/D converter that offers in each signal conditioning circuit uses, the output of the sequential of control A/D converter and conversion back serial data;
Each signal conditioning circuit connects with a digital integrator, each digital integrator is by two shift registers, two digital accumulators, two latchs and an address decoder are formed, two shift registers are under the control of the serial-shift clock sclk of input, respectively just with the serial input, cosine digital signal SDs, SDc converts to and is just walking abreast, cosine digital signal PDs, PDc, send into two digital accumulators then respectively, digital accumulator is under the control of the digital reference signal FCLK of input, with just walking abreast in the one-period, cosine digital signal PDs, PDc adds up, accumulation result is sent into latch under the control of latch signal, just promptly be, the voltage effective value Vsin of cosine signal, Vcos;
The DSP digital signal processor connects with digital integrator by data/address bus, the DSP digital signal processor is sent address signal by address bus, decipher through address decoder, produce chip selection signal, enable the latch of each passage respectively, then by data bus read on each passage lock storage just, cosine signal voltage effective value Vsin, Vcos, call the arctan function storehouse of DSP digital signal processor again, pass through formula: θ=arctanVsin/Vcos calculates the digital angle θ of each passage.
2, signal-number conversion method of rotating transformer according to claim 1 is characterized in that, rotary transformer passage number is 2-12.
3, signal-number conversion method of rotating transformer according to claim 1 and 2 is characterized in that, the frequency of described rotary transformer is 50-5000Hz.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101788306A (en) * | 2010-03-10 | 2010-07-28 | 连云港杰瑞电子有限公司 | Digital self-adaption shaft angle signal-digital converter |
| CN101968367A (en) * | 2010-04-19 | 2011-02-09 | 哈尔滨工程大学 | Multifunctional networking digital shaft angle converter and converting method thereof |
| CN101739013B (en) * | 2009-12-22 | 2011-07-27 | 北京航空航天大学 | Digital control system for satellite aerial directing mechanism |
| CN102230374A (en) * | 2011-06-13 | 2011-11-02 | 电子科技大学 | Underground program remote update device based on 485 bus |
| CN102279824A (en) * | 2011-08-24 | 2011-12-14 | 中国北车股份有限公司大连电力牵引研发中心 | Input interface expanding circuit and control device |
| CN102661754A (en) * | 2012-05-09 | 2012-09-12 | 合肥工业大学 | Digital converter for rotary transformer |
| CN102751991A (en) * | 2012-07-30 | 2012-10-24 | 哈尔滨工业大学 | Delta-Sigma modulation principle based digital switching device and method for rotary transformer |
| CN107478248A (en) * | 2017-07-31 | 2017-12-15 | 浙江天拓电气有限公司 | A kind of rotary transformer calculation method |
| CN107478247A (en) * | 2017-07-31 | 2017-12-15 | 浙江天拓电气有限公司 | A kind of rotary transformer high accuracy resolving system |
| CN107764289A (en) * | 2016-08-18 | 2018-03-06 | 德克萨斯仪器股份有限公司 | For the method and apparatus for the degree of accuracy for improving digital converter of rotary transformer |
| CN109828717A (en) * | 2019-01-31 | 2019-05-31 | 哈尔滨工业大学 | The parallel data acquisition circuit and automatic acquiring method of multiple rotary transformers |
| WO2024032380A1 (en) * | 2022-08-12 | 2024-02-15 | 浙江吉利控股集团有限公司 | Motor position signal fault determination method, device, system, and vehicle |
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2008
- 2008-06-25 CN CN200810022131A patent/CN100575884C/en active Active
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101739013B (en) * | 2009-12-22 | 2011-07-27 | 北京航空航天大学 | Digital control system for satellite aerial directing mechanism |
| CN101788306B (en) * | 2010-03-10 | 2011-11-09 | 连云港杰瑞电子有限公司 | Digital self-adaption shaft angle signal-digital converter |
| CN101788306A (en) * | 2010-03-10 | 2010-07-28 | 连云港杰瑞电子有限公司 | Digital self-adaption shaft angle signal-digital converter |
| CN101968367A (en) * | 2010-04-19 | 2011-02-09 | 哈尔滨工程大学 | Multifunctional networking digital shaft angle converter and converting method thereof |
| CN102230374B (en) * | 2011-06-13 | 2013-06-05 | 电子科技大学 | Underground program remote update device based on 485 bus |
| CN102230374A (en) * | 2011-06-13 | 2011-11-02 | 电子科技大学 | Underground program remote update device based on 485 bus |
| CN102279824A (en) * | 2011-08-24 | 2011-12-14 | 中国北车股份有限公司大连电力牵引研发中心 | Input interface expanding circuit and control device |
| CN102279824B (en) * | 2011-08-24 | 2013-10-09 | 中国北车股份有限公司大连电力牵引研发中心 | Input interface expanding circuit and control device |
| CN102661754B (en) * | 2012-05-09 | 2014-06-25 | 合肥工业大学 | Digital converter for rotary transformer |
| CN102661754A (en) * | 2012-05-09 | 2012-09-12 | 合肥工业大学 | Digital converter for rotary transformer |
| CN102751991B (en) * | 2012-07-30 | 2015-04-22 | 哈尔滨工业大学 | Delta-Sigma modulation principle based digital switching device and method for rotary transformer |
| CN102751991A (en) * | 2012-07-30 | 2012-10-24 | 哈尔滨工业大学 | Delta-Sigma modulation principle based digital switching device and method for rotary transformer |
| CN107764289A (en) * | 2016-08-18 | 2018-03-06 | 德克萨斯仪器股份有限公司 | For the method and apparatus for the degree of accuracy for improving digital converter of rotary transformer |
| CN107764289B (en) * | 2016-08-18 | 2021-10-08 | 德克萨斯仪器股份有限公司 | Method and apparatus for improving accuracy of resolver digitizer |
| CN107478248A (en) * | 2017-07-31 | 2017-12-15 | 浙江天拓电气有限公司 | A kind of rotary transformer calculation method |
| CN107478247A (en) * | 2017-07-31 | 2017-12-15 | 浙江天拓电气有限公司 | A kind of rotary transformer high accuracy resolving system |
| CN107478247B (en) * | 2017-07-31 | 2019-07-23 | 浙江天拓电气有限公司 | A kind of rotary transformer high-precision resolving system |
| CN109828717A (en) * | 2019-01-31 | 2019-05-31 | 哈尔滨工业大学 | The parallel data acquisition circuit and automatic acquiring method of multiple rotary transformers |
| WO2024032380A1 (en) * | 2022-08-12 | 2024-02-15 | 浙江吉利控股集团有限公司 | Motor position signal fault determination method, device, system, and vehicle |
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