CN102879021B - Rotary transformer angle code converting method and converter - Google Patents
Rotary transformer angle code converting method and converter Download PDFInfo
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- CN102879021B CN102879021B CN201210357311.4A CN201210357311A CN102879021B CN 102879021 B CN102879021 B CN 102879021B CN 201210357311 A CN201210357311 A CN 201210357311A CN 102879021 B CN102879021 B CN 102879021B
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Abstract
The invention provides a rotary transformer angle code converting method and a converter. The rotary transformer angle code converting method comprises the following steps of: respectively demodulating a sine voltage signal and a cosine voltage signal which are outputted from a rotary transformer; extracting angle values of 180 degrees, 90 degrees and 45 degrees of a high third bit from the sine voltage signal and the cosine voltage signal; sorting the inputted voltage signals according to sizes after plus of the inputted voltage signals; performing analog/digital signal conversion for the sorted voltage signals to obtain digital signals of sine voltage and cosine voltage; dividing the obtained sine voltage by the cosine voltage to obtain a digital signal of a tangent numerical value of an angle ranging from 0 degree to 45 degrees; and comparing the obtained tangent numerical value with data in a form memory to obtain a low eighth bit digital signal of an angle ranging from 0 degree to 45 degrees. An exclusive-or gate circuit is used for replacing a computer to calculate, the high third bit can be directly extracted under the condition that hardware is not added, and the converter is simple in system and small in size, is visualized and reliable, and is applied to a microminiature product conveniently.
Description
Technical field
The present invention relates to converter, especially a kind of for the rotary transformer corner brace conversion method of inertia production and according to the corner brace converter of the method.
Background technology
In prior art, the many employings of rotary transformer corner brace converter are divided into eight intervals 0 °～360 °, and each interval is 45 °.Angle numerical value adopts the binary number value representation of 11, and wherein high one is 180 °, and Senior Two position is 90 °, and Senior Three position is 45 °, and Gao Siwei is 22.5 °, and Gao Wuwei is the half of high four parallactic angle number of degrees values, the like.Obtain digital angle by machine solution inverse sine (or arc tangent) function, mostly be modularization, volume is larger, cannot on microminiature product, use, and cost is expensive.China Patent Publication No. is 201194019, and name is called: rotary transformer detection apparatus; And China Patent Publication No. is: 101281041, and name is called: single power supply CMOS integrated circuit autosyn/rotary transformer-digital conversion technique, it has all adopted modularization, and volume is difficult to do little, cannot on microminiature product, use, and cost is high.
Summary of the invention
For above-mentioned technical matters, the invention provides a kind of rotary transformer corner brace conversion method and rotary transformer corner brace converter thereof that Senior Three parallactic angle number of degrees value is directly extracted in the situation that not increasing hardware from cosine and sine signal, be applicable to microminiature product, cost is low.
To achieve these goals, the technical solution used in the present invention is as follows:
Rotary transformer corner brace conversion method, is characterized in that,
Carry out in accordance with the following steps:
(1) sine voltage signal and the cosine voltage signal of rotary transformer output are carried out respectively to demodulation;
(2) 180 ° of Senior Three position, 90 ° and 45 ° are extracted successively from sine voltage signal and cosine voltage signal;
(3) voltage signal of input is got and carried out just afterwards big or small sorting;
(4) voltage signal after big or small sorting is carried out to analog/digital signal conversion, obtain the digital signal of sinusoidal and cosine voltage;
(5) sinusoidal voltage obtaining is obtained to the digital signal of an angle tangent numerical value between 0～45 ° divided by cosine voltage;
(6) according to the tangent numerical value of trying to achieve, compare with the data in table memory, obtain the low eight digit number word signal of 0～45 °.
(7) Senior Three position being exported together with low eight to host computer carries out corner brace and resolves.
In step (1) and (2), offset of sinusoidal voltage signal carries out demodulation, directly judges the quadrant that sine voltage signal is positioned at, if the deflection angle of rotary transformer is positioned at third quadrant or fourth quadrant, directly extracts high one 180 °;
Sine voltage signal and cosine voltage signal, as two input signal input NOR gate circuits, by the output of NOR gate circuit, extract 90 ° of Senior Two position.
Compare the absolute value of sine voltage signal and the order of magnitude of cosine voltage signal by comparer, comparer output numerical value is as a road XOR gate input signal, as the input of NOR gate circuit, by the output of NOR gate circuit, extract 45 ° of Senior Three position together with Senior Two bit value.
A kind of rotary transformer corner brace converter, is characterized in that, comprises sine and cosine detuner, gets positive device, the first NOR gate circuit, the second NOR gate circuit, big or small sorting switch, comparer, A/D converter and table memory;
Described sine and cosine detuner carries out demodulation for the sine to rotary transformer, cosine signal respectively, and directly extracts high one 180 °;
Described the first NOR gate circuit, for to the sine after demodulation, cosine signal evaluation, extracts 90 ° of Senior Two position;
The described input end of getting positive device is connected with the output terminal of described sine and cosine detuner, and this is got positive device and just gets for the sine to after demodulation, cosine voltage signal, and the voltage signal after just getting is transferred to respectively to described comparer and big or small sorting switch;
Described comparer is for comparing sine, cosine signal after just getting, the output terminal of this comparer is connected with the first input end of described the second NOR gate circuit, the second input end of this second NOR gate circuit is connected with the output terminal of described the first NOR gate circuit, and the output terminal output of described the second NOR gate circuit extracts the signal of 45 ° of Senior Three positions;
The first output terminal of described big or small sorting switch is connected with the input end of described A/D converter, the second output terminal of this size sorting switch is connected with the reference edge of described A/D converter, the output terminal of this A/D converter is connected with the first input end of described table memory, the second input end of this table memory is connected with the output terminal of described the second NOR gate circuit, and the output terminal of this table memory is exported low eight bit data.
Good effect of the present invention is:
The present invention directly extracts the front three of the data-signal of 11, and whole transfer process can be completely without computer-solution, and system is simple, directly perceived, reliable.
Rotary transformer corner brace converter of the present invention, simplifies signals of rotating transformer transfer process, replaces computer-solution with NOR gate circuit, and Senior Three position directly extracts in the situation that not increasing hardware from cosine and sine signal.Such rotary transformer corner brace converter has that system is simple, directly perceived, reliable, volume is little, and the inertia production of the rotating signal transmission that the speed that is applicable to is not high, is convenient to apply on microminiature product.
Brief description of the drawings
Fig. 1 is principle of work block diagram of the present invention.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail.
As shown in Figure 1, rotary transformer corner brace conversion method, carry out in accordance with the following steps:
(1) sine voltage signal and the cosine voltage signal of rotary transformer output are carried out respectively to demodulation;
(2) 180 ° of Senior Three position, 90 ° and 45 ° are extracted successively from sine voltage signal and cosine voltage signal;
(3) voltage signal of input is got and carried out just afterwards big or small sorting;
(4) voltage signal after big or small sorting is carried out to analog/digital signal conversion, obtain the digital signal of sinusoidal and cosine voltage;
(5) sinusoidal voltage obtaining is obtained to the digital signal of an angle tangent numerical value between 0～45 ° divided by cosine voltage;
(6) according to the tangent numerical value of trying to achieve, compare with the data in table memory, obtain the low eight digit number word signal of 0～45 °.
(7) Senior Three position being exported together with low eight to host computer carries out corner brace and resolves.
In step (1) and (2), offset of sinusoidal voltage signal carries out demodulation, directly judges the quadrant that sine voltage signal is positioned at, if the deflection angle of rotary transformer is positioned at third quadrant or fourth quadrant, directly extracts high one 180 °;
Sine voltage signal and cosine voltage signal, as two input signal input NOR gate circuits, by the output of NOR gate circuit, extract 90 ° of Senior Two position.
Compare the absolute value of sine voltage signal and the order of magnitude of cosine voltage signal by comparer, comparer output numerical value is as a road XOR gate input signal, as the input of NOR gate circuit, by the output of NOR gate circuit, extract 45 ° of Senior Three position together with Senior Two bit value.
Embodiment 1: the deflection angle numerical value of rotary transformer is 240 °.Use sine and cosine detuner by rotary transformer just, cosine signal carries out respectively demodulation, judges that the deflection angle of rotary transformer is at the third quadrant of coordinate system, now directly 180 ° of the high one digit number values in deflection numerical value are extracted.
Sine voltage signal and cosine voltage signal are respectively as the two-way input signal of NOR gate circuit, and now sine voltage signal and cosine voltage signal are all negative, and cosine voltage signal is greater than sine voltage signal, now without extracting 90 ° of Senior Two position.
By comparer relatively after just getting just, the size of cosine signal, sinusoidal signal numerical value after just getting is greater than the numerical value of the cosine signal after just getting, comparer output high level, the high level signal of this comparer output and export the input as NOR gate circuit together with Senior Two bit value, NOR gate circuit is exported high level, now extracts 45 ° of Senior Three position.Now calculate defection signal and be positioned at 0 to 360 ° eight the 6th interval intervals.
To after just getting just, cosine signal carries out respectively A/D conversion, the sinusoidal signal numerical value after conversion, divided by cosine signal numerical value, obtains a tangent numerical value, tables look-up and obtains being positioned at the 6th interval angle numerical value by separating arc tangent.Thereby obtain the deflection angle numerical value of the rotary transformer of low eight.
According to the rotary transformer corner brace converter of above-mentioned rotary transformer corner brace conversion method design, comprise sine and cosine detuner 1, get positive device 2, the first NOR gate circuit 4, the second NOR gate circuit 5, big or small sorting switch 6, comparer 7, A/D converter 8 and table memory 9;
Described sine and cosine detuner 1 carries out demodulation for the sine to rotary transformer, cosine signal respectively, and directly extracts high one 180 °;
Described the first NOR gate circuit 4, for the sine to after demodulation, cosine signal evaluation, extracts 90 ° of Senior Two position;
The described input end of getting positive device 2 is connected with the output terminal of described sine and cosine detuner 1, and this is got positive device 2 and just gets for the sine to after demodulation, cosine signal, and the signal after just getting is transferred to respectively to comparer 7 and big or small sorting switch 6;
Described comparer 7 is for comparing sine, cosine signal after just getting, the output terminal of this comparer 7 is connected with the first input end of described the second NOR gate circuit 5, the second input end of this second NOR gate circuit 5 is connected with the output terminal of described the first NOR gate circuit 4, and the output terminal output of described the second NOR gate circuit 5 extracts the signal of 45 ° of Senior Three positions;
The first output terminal of described big or small sorting switch 6 is connected with the input end of described A/D converter 8, the second output terminal of this size sorting switch 6 is connected with the reference edge of described A/D converter 8, the output terminal of this A/D converter 8 is connected with the first input end of described table memory 9, the second input end of this table memory 9 is connected with the output terminal of described the second NOR gate circuit 5, and the output terminal of this table memory 9 is exported low eight bit data.
Rotary transformer corner brace converter of the present invention, has simplified signals of rotating transformer transfer process, replaces computer-solution with NOR gate circuit, and Senior Three position directly extracts in the situation that not increasing hardware from cosine and sine signal.It is simple, directly perceived, reliable that such rotary transformer corner brace converter has system, the inertia production of the rotating signal transmission that the speed that is applicable to is not high.
The above embodiment of the present invention is to be only explanation example of the present invention, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make on the basis of the above description other multi-form variation and variations.Here cannot give exhaustive to all embodiments.Everyly belong to apparent variation or the still row in protection scope of the present invention of variation that technical scheme of the present invention amplifies out.
Claims (2)
1. rotary transformer corner brace conversion method, is characterized in that,
Carry out in accordance with the following steps:
(1) sine voltage signal and the cosine voltage signal of rotary transformer output are carried out respectively to demodulation;
(2) 180 ° of Senior Three position, 90 ° and 45 ° are extracted successively from sine voltage signal and cosine voltage signal;
(3) voltage signal of input is got and carried out just afterwards big or small sorting;
(4) voltage signal after big or small sorting is carried out to analog/digital signal conversion, obtain the digital signal of sinusoidal and cosine voltage;
(5) sinusoidal voltage obtaining is obtained to the digital signal of an angle tangent numerical value between 0～45 ° divided by cosine voltage;
(6) according to the tangent numerical value of trying to achieve, compare with the data in table memory, obtain the low eight digit number word signal of 0～45 °;
(7) Senior Three position being exported together with low eight to host computer carries out corner brace and resolves.
2. rotary transformer corner brace conversion method according to claim 1, it is characterized in that, in described step (1) and (2), offset of sinusoidal voltage signal carries out demodulation, directly judge the quadrant that sine voltage signal is positioned at, if the deflection angle of rotary transformer is positioned at third quadrant or fourth quadrant, directly extract high one 180 °;
Sine voltage signal and cosine voltage signal, as two input signal input NOR gate circuits, by the output of NOR gate circuit, extract 90 ° of Senior Two position;
Compare the absolute value of sine voltage signal and the order of magnitude of cosine voltage signal by comparer, comparer output numerical value is as a road XOR gate input signal, as the input of NOR gate circuit, by the output of NOR gate circuit, extract 45 ° of Senior Three position together with Senior Two bit value.
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| CN201210357311.4A CN102879021B (en) | 2012-09-24 | 2012-09-24 | Rotary transformer angle code converting method and converter |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104135284B (en) * | 2014-07-30 | 2017-05-03 | 佛山科学技术学院 | Phase discrimination method and device as well as phase locking method and phase-locked loop |
| CN105823899B (en) * | 2015-09-16 | 2019-01-11 | 浙江吉利汽车有限公司 | The implementation method of vehicle turning speed is calculated based on rotary transformer |
| US10408643B2 (en) * | 2016-08-18 | 2019-09-10 | Texas Instruments Incorporated | Methods and apparatus to increase resolver-to-digital converter accuracy |
| CN107017845B (en) * | 2017-04-10 | 2020-10-20 | 上海龙东光电子有限公司 | Angle demodulation device and method for single-pole rotary transformer |
| CN111025190B (en) * | 2019-11-28 | 2021-11-09 | 中国航空工业集团公司西安航空计算技术研究所 | Rotary transformer signal conditioning circuit and method |
| CN111555755B (en) * | 2020-05-22 | 2023-08-22 | 上海传卓电子有限公司 | Rapid angle analog-to-digital converter and design method |
| CN112284427B (en) * | 2020-10-29 | 2023-06-30 | 中国航空工业集团公司洛阳电光设备研究所 | Method for high-speed conversion of angle signal of rotary transformer |
| CN112945288B (en) * | 2021-01-19 | 2022-09-06 | 河北汉光重工有限责任公司 | Full-angle measuring device and method for rotary transformer |
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| CN201194019Y (en) * | 2007-12-05 | 2009-02-11 | 比亚迪股份有限公司 | Rotary transformer detection apparatus |
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Patent Citations (8)
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| JPS6439520A (en) * | 1987-08-05 | 1989-02-09 | Mitsubishi Electric Corp | Resolver digital converting device |
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