CN106338240A - Rotating position detection method - Google Patents
Rotating position detection method Download PDFInfo
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- CN106338240A CN106338240A CN201510408080.9A CN201510408080A CN106338240A CN 106338240 A CN106338240 A CN 106338240A CN 201510408080 A CN201510408080 A CN 201510408080A CN 106338240 A CN106338240 A CN 106338240A
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Abstract
The invention provides a rotating position detection method which belongs to the technical field of position detecting methods, and particularly relates to the rotating position detection method. The rotating position detection method provided by the invention has high detection accuracy. The method provided by the invention comprises the steps that output signals sinsinEt omega theta and sincosEt omega theta of two stator windings of a rotating transformer are respectively sent into sin and cos input pins of AD2S90, and then are sent into a multiplier through the internal operational amplifier; if the initial digital angle output by an internal increment and decrement counter is sent into the multiplier, output signals sincossinEt omega theta and sinsincosEt omega theta are acquired after multiplication; subtraction is carried out on sincossinEt omega theta and sinsincosEt omega theta to acquire an output signal; and an error part in the signal is sent to a closed-loop feedback system composed of a phase sensitive detector, a multiplier, a voltage-controlled oscillator and an addition and subtraction counter.
Description
Technical field
The invention belongs to method for detecting position technical field, more particularly, to a kind of position of rotation detection method.
Background technology
Rotary transformer is a kind of rotary transformator, is the inductance type angle sensor assembly that a kind of signal of telecommunication of output becomes certain functional relationship with angle of rotor, is one kind of small and special electric machine.Its stator and rotor windings are two in space mutual deviation 900The operation principle that the high-precision sine windings rotation of electrical angle becomes is essentially identical with general transformator.For transformator, its former limit, vice-side winding coupling position are fixed, and output voltage virtual value is constant;The vice-side winding of rotary transformer changes with rotor-position, and so that with the change of angle of rotor position, the output voltage of biphase output winding changes with corner and is in specific functional relationship.Then the energy magnitude of rotary transformer is also as the change of shaft angle and forms sinusoidal variations.
Content of the invention
The present invention is aiming at the problems referred to above, provides the position of rotation detection method that a kind of Detection accuracy is high.
For achieving the above object, the present invention comprises the following steps.
1) the output signal sinsinet ω θ and sincoset ω θ of the two-way stator winding of rotary transformer is respectively fed to sin the and cos input pin of ad2s90, deliver to again in multiplier through its internal amplifier, if the initial number angle of internal up-down counter output is also fed in multiplier, the output signal then obtaining after multiplying is sincossinet ω θ and sinsincoset ω θ, the two carries out additive operation and obtains output signal, error component in signal is fed to by phase sensitive detector, multiplier, voltage controlled oscillator, the closed loop feedback system that up-down counter is formed, the angle of up-down counter output is exactly the displacement angle of rotor.
2) analogue signal that the two paths of signals of rotary transformer Secondary Winding output detect as position angle inputs, be coupled with corresponding input with；Produce output signal and be connected to ad2s90 after processing, compensate rotary transformer primary side to the phase deviation of secondary side.
3) pass through outfan and the Exciting Windings for Transverse Differential Protection for rotary transformer provides the excitation signal of operating frequency；And if when signal is below the threshold voltage specifying, being pulled upward to high level vdd.
4) two windings of rotary transformer secondary export sinusoidal signal and cosine signal respectively；It is supplied to the position measurement signal of dsp with quadrature coding pulse.
As a kind of preferred version, step 2 of the present invention) rotary transformer Secondary Winding output two paths of signals cos and sin as ad2s90 position angle detection analogue signal input, by Shielded Twisted Pair be coupled with ad2s90 corresponding input and；The signal of co sum is connected to ad2s99 as feedback signal simultaneously, produces the sincosref pin that output signal is connected to ad2s90 after ad2s99 inter-process, compensates rotary transformer primary side to the phase deviation of secondary side.
As another kind of preferred version, step 3) ad2s99 of the present invention passes through outfan and the Exciting Windings for Transverse Differential Protection for rotary transformer provides the excitation signal of operating frequency, and the operating frequency of excitation signal is arranged by the pin of ad2s99；The pin of ad2s99 is used for instruction and the detection case of signal deletion, is low level during normal work；And if when signal is below the threshold voltage specifying, being pulled upward to high level vdd.
In addition, the former limit input excitation signal frequency configuration 10khz of step 4) rotary transformer of the present invention；Two windings of rotary transformer secondary export sinusoidal signal and cosine signal respectively；It is supplied to the position measurement signal of dsp with quadrature coding pulse.
Beneficial effect of the present invention.
It is its simple, reliable hardware circuit and higher precision and resolution using the maximum advantage of the digital rotary transformer of the present invention, and it is also that other similar approach are incomparable in hardware circuit miniaturization and advantage in price.For the high performance servo system being operated in the strong motions such as automobile, ship, thump and severe humiture changing environment, it is a kind of economical and practical shaft angle detection method.The solution of the present invention achieves the accurate measurement of asynchronous machine rotor position signalling in military armor car alternating-current actuating system well.
Specific embodiment
The present invention comprises the following steps.
1) the output signal sinsinet ω θ and sincoset ω θ of the two-way stator winding of rotary transformer is respectively fed to sin the and cos input pin of ad2s90, deliver to again in multiplier through its internal amplifier, if the initial number angle of internal up-down counter output is also fed in multiplier, the output signal then obtaining after multiplying is sincossinet ω θ and sinsincoset ω θ, the two carries out additive operation and obtains output signal, error component in signal is fed to by phase sensitive detector, multiplier, voltage controlled oscillator, the closed loop feedback system that up-down counter is formed, the angle of up-down counter output is exactly the displacement angle of rotor.
2) analogue signal that the two paths of signals of rotary transformer Secondary Winding output detect as position angle inputs, be coupled with corresponding input with；Produce output signal and be connected to ad2s90 after processing, compensate rotary transformer primary side to the phase deviation of secondary side.
3) pass through outfan and the Exciting Windings for Transverse Differential Protection for rotary transformer provides the excitation signal of operating frequency；And if when signal is below the threshold voltage specifying, being pulled upward to high level vdd.
4) two windings of rotary transformer secondary export sinusoidal signal and cosine signal respectively；It is supplied to the position measurement signal of dsp with quadrature coding pulse.
Described step 2) rotary transformer Secondary Winding output two paths of signals cos and sin as ad2s90 position angle detection analogue signal input, by Shielded Twisted Pair be coupled with ad2s90 corresponding input and；The signal of co sum is connected to ad2s99 as feedback signal simultaneously, produces the sincosref pin that output signal is connected to ad2s90 after ad2s99 inter-process, compensates rotary transformer primary side to the phase deviation of secondary side.
Described step 3) ad2s99 passes through outfan and the Exciting Windings for Transverse Differential Protection for rotary transformer provides the excitation signal of operating frequency, and the operating frequency of excitation signal is arranged by the pin of ad2s99；The pin of ad2s99 is used for instruction and the detection case of signal deletion, is low level during normal work；And if when signal is below the threshold voltage specifying, being pulled upward to high level vdd.
The former limit input excitation signal frequency configuration 10khz of described step 4) rotary transformer；Two windings of rotary transformer secondary export sinusoidal signal and cosine signal respectively；It is supplied to the position measurement signal of dsp with quadrature coding pulse.
Rotary transformer of the present invention is the brushless resovler of the ts262n21e11 model that Japanese Duo Mo river company produces.Two key chip r/d transducer ad2s90 and programmable oscillator ad2s99 of ad company are mainly employed, the two will use cooperatively in circuit.
Ad2s90 is the core of rdc circuit design, the closed loop feedback system that inner function module is mainly formed by phase sensitive detector, multiplier, voltage controlled oscillator (vco), up-down counter.Ad2s99 is that ad company aims at the excitation signal source that its rotary transformer/digital converter family chip provides, and signal frequency has four kinds to select 2khz, 5khz, 10khz and 20khz.It is not only ad2s90 and provides synchronous base voltage signal, and return rotary transformer provides the sine wave excitation signal of high-quality simultaneously, also has the advantages that signal phase compensation and signal loss detection etc. are prominent.This not only can improve the reliability of roll angle inspection circuit, and enable the sine and cosine output signal of rotary transformer to meet the requirement of the amplitude to input signal for the ad2s90 and phase place, directly rotary transformer can be carried out Interface design with ad2s90, otherwise need additional designs process circuit that the output signal of rotary transformer is converted to the signal required by ad2s90.
Above content is the further description present invention made with reference to specific preferred implementation; it cannot be assumed that the present invention be embodied as be confined to these explanations; for general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; some simple deduction or replace can also be made, all should be considered as belonging to the protection domain of claims determination that the present invention is submitted to.
Claims (4)
1. a kind of position of rotation detection method is it is characterised in that comprise the following steps:
1) the output signal sinsinet ω θ and sincoset ω θ of the two-way stator winding of rotary transformer is respectively fed to sin the and cos input pin of ad2s90, deliver to again in multiplier through its internal amplifier, if the initial number angle of internal up-down counter output is also fed in multiplier, the output signal then obtaining after multiplying is sincossinet ω θ and sinsincoset ω θ, the two carries out additive operation and obtains output signal, error component in signal is fed to by phase sensitive detector, multiplier, voltage controlled oscillator, the closed loop feedback system that up-down counter is formed, the angle of up-down counter output is exactly the displacement angle of rotor；
2) analogue signal that the two paths of signals of rotary transformer Secondary Winding output detect as position angle inputs, be coupled with corresponding input with；Produce output signal and be connected to ad2s90 after processing, compensate rotary transformer primary side to the phase deviation of secondary side；
3) pass through outfan and the Exciting Windings for Transverse Differential Protection for rotary transformer provides the excitation signal of operating frequency；And if when signal is below the threshold voltage specifying, being pulled upward to high level vdd；
4) two windings of rotary transformer secondary export sinusoidal signal and cosine signal respectively；It is supplied to the position measurement signal of dsp with quadrature coding pulse.
2. a kind of position of rotation detection method according to claim 1, it is characterized in that described step 2) two paths of signals cos and sin of rotary transformer Secondary Winding output as the position angle detection of ad2s90 analogue signal input, by Shielded Twisted Pair be coupled with ad2s90 corresponding input and；The signal of co sum is connected to ad2s99 as feedback signal simultaneously, produces the sincosref pin that output signal is connected to ad2s90 after ad2s99 inter-process, compensates rotary transformer primary side to the phase deviation of secondary side.
3. a kind of position of rotation detection method according to claim 2, it is characterized in that described step 3) ad2s99 passes through outfan and the Exciting Windings for Transverse Differential Protection for rotary transformer provides the excitation signal of operating frequency, the operating frequency of excitation signal is arranged by the pin of ad2s99；The pin of ad2s99 is used for instruction and the detection case of signal deletion, is low level during normal work；And if when signal is below the threshold voltage specifying, being pulled upward to high level vdd.
4. according to claim 3 a kind of position of rotation detection method it is characterised in that described step 4) rotary transformer former limit input excitation signal frequency configuration 10khz；Two windings of rotary transformer secondary export sinusoidal signal and cosine signal respectively；It is supplied to the position measurement signal of dsp with quadrature coding pulse.
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| CN201510408080.9A CN106338240A (en) | 2015-07-14 | 2015-07-14 | Rotating position detection method |
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| CN201510408080.9A CN106338240A (en) | 2015-07-14 | 2015-07-14 | Rotating position detection method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107517025A (en) * | 2017-08-30 | 2017-12-26 | 擎声自动化科技（上海）有限公司 | A kind of motor position feedback device and its signal processing method |
| CN108204830A (en) * | 2017-11-28 | 2018-06-26 | 珠海格力节能环保制冷技术研究中心有限公司 | The compensation method of phase deviation and device |
| CN110943670A (en) * | 2019-12-30 | 2020-03-31 | 中国科学院电工研究所 | Motor rotor position obtaining method and system |
| CN112485460A (en) * | 2020-11-17 | 2021-03-12 | 上海吉亿电机有限公司 | Signal acquisition and compensation method for rotary transformer |
| CN112504115A (en) * | 2020-11-17 | 2021-03-16 | 中国电子科技集团公司第三十八研究所 | Detection device and method for double-channel rotary transformer installation flatness on rotary table |
-
2015
- 2015-07-14 CN CN201510408080.9A patent/CN106338240A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107517025A (en) * | 2017-08-30 | 2017-12-26 | 擎声自动化科技（上海）有限公司 | A kind of motor position feedback device and its signal processing method |
| CN108204830A (en) * | 2017-11-28 | 2018-06-26 | 珠海格力节能环保制冷技术研究中心有限公司 | The compensation method of phase deviation and device |
| CN110943670A (en) * | 2019-12-30 | 2020-03-31 | 中国科学院电工研究所 | Motor rotor position obtaining method and system |
| CN110943670B (en) * | 2019-12-30 | 2021-10-01 | 中国科学院电工研究所 | Motor rotor position obtaining method and system |
| CN112485460A (en) * | 2020-11-17 | 2021-03-12 | 上海吉亿电机有限公司 | Signal acquisition and compensation method for rotary transformer |
| CN112504115A (en) * | 2020-11-17 | 2021-03-16 | 中国电子科技集团公司第三十八研究所 | Detection device and method for double-channel rotary transformer installation flatness on rotary table |
| CN112485460B (en) * | 2020-11-17 | 2022-11-04 | 上海吉亿电机有限公司 | Signal acquisition and compensation method for rotary transformer |
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Application publication date: 20170118 |