CN102538832B - Digital-shaft angle signal converting method - Google Patents
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- CN102538832B CN102538832B CN201110438005.9A CN201110438005A CN102538832B CN 102538832 B CN102538832 B CN 102538832B CN 201110438005 A CN201110438005 A CN 201110438005A CN 102538832 B CN102538832 B CN 102538832B
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Abstract
The invention provides a digital-shaft angle signal converting method. The method is characterized in that: a circuit realizing the method comprises a digital-sine and cosine signal converting circuit, an electronic wide-frequency and wide-voltage SCOTT transformer and a digital signal processor (DSP), wherein the digital-sine and cosine signal converting circuit consists of a subdivision circuit and a rough division circuit; the subdivision circuit is a resistance network digital/analogue (D/A) conversion circuit which is less than 16 bits; the rough division circuit consists of a precise resistance network, a precise operational amplifier and an analogue switch; and the electronic wide-frequency and wide-voltage SCOTT transformer consists of a mode operational circuit, a voltage amplitude value operational circuit and a power driving circuit. Full electronic technology is adopted by the digital-shaft angle signal converting method; a wide-frequency and wide-voltage differential synchro signal or rotary transformer signal can be output; the conversion precision is high; and the expandability is high.
Description
Technical field
The present invention belongs to signal imitation and technical field of measurement and test, particularly a kind of digital-shaft angle signal converting method.
Background technology
Common shaft angle signal has selsyn signal and signals of rotating transformer, numeral-resolver-to-angle converter converts digital angle signal to selsyn signal or signals of rotating transformer exactly, be the core devices in modern shaft angle electronics converter technique, be widely used in space flight, aviation, radar, fire control and industrial automation.Existing numeral-resolver-to-angle converter can only be realized the conversion of a kind of signal type, a kind of signal voltage and a kind of signal frequency, function singleness; Though it is able to programme that shaft angle simulator can be realized frequency, voltage and signal type, can only reach 16 bit resolutions and 14 precision, product cost performance is low, and bad adaptability is unfavorable for applying of measurement of angle and control field.
Summary of the invention
Technical matters to be solved by this invention is for the deficiencies in the prior art, propose a kind of digital-shaft angle signal converting method, the method adopts full-electronic technology, can realize selsyn signal or the signals of rotating transformer output of the wide pressure of wideband, and conversion accuracy is high, extensibility is strong.
Technical matters to be solved by this invention is to realize by following technical scheme.The present invention is a kind of numeral-shaft angle signal conversion method, is characterized in, the circuit of realizing the method comprises numeral-cosine and sine signal change-over circuit, the wide pressure of electronic type wideband SCOTT transformer and DSP digital signal processor;
Numeral-cosine and sine signal change-over circuit is by sub-circuit and rough segmentation the electric circuit constitute; Sub-circuit is low 16 weighted resistance network D/A change-over circuits, and rough segmentation circuit is made up of precision resistance network, accurate amplifier and analog switch; The wide pressure of electronic type wideband SCOTT transformer is made up of pattern computing circuit, voltage magnitude computing circuit and power driving circuit;
Numeral-cosine and sine signal change-over circuit receives the excited signal through current mode transformer isolation of outside input and the 20 bit digital angle θ that DSP digital signal processor sends, produce cosine and sine signal, send to pattern computing circuit through current mode isolating transformer, the control command control front end input relay through electromagnetic isolation that pattern computing circuit sends according to DSP digital signal processor, carry out signal type selection, export four line signals of rotating transformer or three line selsyn signals to voltage magnitude computing circuit, the amplitude control command through electromagnetic isolation that voltage magnitude computing circuit sends according to DSP digital signal processor, the shaft angle signal of output respective magnitudes, the control command through electromagnetic isolation that power driving circuit sends according to DSP digital signal processor is exported shaft angle signal, select the power amplification circuit of relevant voltage section to carry out power, amplitude is amplified, output shaft angle signal, realize the conversion of numeral-shaft angle.
In above-described numeral-shaft angle signal conversion method technical scheme: described numeral-cosine and sine signal conversion accuracy is realized by hardware precision resistance network; Numeral-cosine and sine signal change-over circuit is realized by high 4 rough segmentation weighted resistance networks and low 16 segmentation weighted resistance networks, weighted resistance network all adopts the Low Drift Temperature precision resistance network architecture, high 4 rough segmentation angles and low 16 segmentation angles according to trigonometric function just, two jiaos of cosine and synthesize 20 full angles with poor numeral expression formula; Realize the 2V low pressure cosine and sine signal output of 0.001 ° of precision.
In above-described numeral-shaft angle signal conversion method technical scheme: described pattern computing circuit is preferably made up of precision resistance, precision operational-amplifier and front end input relay, receives fixing two-way cosine and sine signal:
, according to output mode signal difference, switch corresponding circuits; After SGND, cos θ, sin θ and CGND signal being amplified in the time of four line signals of rotating transformer output, export to voltage magnitude computing circuit; In the time of three line selsyn signal output, will after SGND ,-sin (θ+240 °) and the amplification of sin θ signal, export to voltage magnitude computing circuit.
In above-described numeral-shaft angle signal conversion method technical scheme: described voltage magnitude computing circuit is preferably made up of high-precision linear DAC and precision operational-amplifier, receive four line signals of rotating transformer SGND, cos θ, sin θ and CGND or three line selsyn signal SGND ,-sin (θ+240 °) and sin θ, according to output signal voltage amplitude difference, four line signals of rotating transformer or the three line selsyn signals of output 0.388V-7V.
In conversion method of the present invention: numeral-cosine and sine signal change-over circuit is accepted the excited signal through current mode transformer isolation of 20 bit digital angles and outside input, be converted to the cosine and sine signal of 2V; Realize the resolution of 0.0003 ° and the precision of 0.001 °.Mathematical model is
Sin(α＋β)=
Cos(α＋β)=
(α is high 4 rough segmentations numeral angle, and β is low 16 digital angles of segmentation).
For realizing precision index, when circuit design, simulating signal and digital signal electric power system are separated, be-4V simulation system wherein that positive supply is+5V that negative supply is-13V; Be digital display circuit outside input ground, power supply is+5V.
In conversion method of the present invention: pattern computing circuit can realize four line signals of rotating transformer outputs by DSP DSP CONTROL transfer relay or three line selsyn signals are exported, and pattern computing circuit receives the cosine and sine signal of two-way isolation:
, after only signal need being amplified, export to voltage magnitude computing circuit in the time of four line signals of rotating transformer output.In the time of three line selsyn signal output, by the cosine and sine signal of two-way isolation altogether, after arithmetical operation, produce after SGND ,-sin (θ+240 °) and sin θ also amplify and export to voltage magnitude computing circuit.
In conversion method of the present invention: DSP digital signal processor is according to required shaft angle signal voltage magnitude, send the amplitude control word of isolation to 16 bit linear DAC, according to voltage magnitude place segment, send the control word of isolation to relay switch low-voltage, high-current power driving circuit or high-voltage power driving circuit, realize the output of 5V to 90V signal voltage.Current mode transformer secondary output loop amplifier has inhibiting effect to low-frequency interference signal.And low frequency signal is produced to large phase shift.In the time that the frequency of carrier signal changes from 400Hz-5000Hz, whole system can produce maximum error and add up with the increase of frequency at 45 ° or symmetric points.The sine and cosine that dsp software algorithm compensation sends mainly for current mode transformer gains not mate and carries out frequency-accuracy compensation, and penalty function is
, by above measure, realize the shaft angle signal output of the wide pressure of wideband.
Compared with prior art, digital-shaft angle signal converting method of the present invention adopts full-electronic technology, can realize selsyn signal or the signals of rotating transformer output of the wide pressure of wideband, and conversion accuracy is high, and extensibility is strong.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the technology of the present invention;
Fig. 2 is low 16 sub-circuit block diagrams of numeral-cosine and sine signal change-over circuit;
Fig. 3 is high 4 rough segmentation circuit diagrams of numeral-cosine and sine signal change-over circuit;
Fig. 4 is pattern computing circuit figure;
Fig. 5 is voltage magnitude computing circuit figure.
Embodiment
Referring to accompanying drawing, further describe concrete technical scheme of the present invention, so that those skilled in the art understands the present invention further, and do not form the restriction to its right.
Case study on implementation 1, with reference to Fig. 1-4, a kind of numeral-shaft angle signal conversion method, the circuit of realizing the method comprises numeral-cosine and sine signal change-over circuit, the wide pressure of electronic type wideband SCOTT transformer and DSP digital signal processor;
Numeral-cosine and sine signal change-over circuit is by sub-circuit and rough segmentation the electric circuit constitute; Sub-circuit is low 16 weighted resistance network D/A change-over circuits, and rough segmentation circuit is made up of precision resistance network, accurate amplifier and analog switch; The wide pressure of electronic type wideband SCOTT transformer is made up of pattern computing circuit, voltage magnitude computing circuit and power driving circuit;
Numeral-cosine and sine signal change-over circuit receives the excited signal through current mode transformer isolation of outside input and the 20 bit digital angle θ that DSP digital signal processor sends, produce cosine and sine signal, send to pattern computing circuit through current mode isolating transformer, the control command control front end input relay through electromagnetic isolation that pattern computing circuit sends according to DSP digital signal processor, carry out signal type selection, export four line signals of rotating transformer or three line selsyn signals to voltage magnitude computing circuit, the amplitude control command through electromagnetic isolation that voltage magnitude computing circuit sends according to DSP digital signal processor, the shaft angle signal of output respective magnitudes, the control command through electromagnetic isolation that power driving circuit sends according to DSP digital signal processor is exported shaft angle signal, select the power amplification circuit of relevant voltage section to carry out power, amplitude is amplified, output shaft angle signal, realize the conversion of numeral to shaft angle.
Embodiment 2, in numeral-shaft angle signal conversion method described in embodiment 1: numeral-cosine and sine signal change-over circuit is realized by high 4 rough segmentation weighted resistance networks and low 16 segmentation weighted resistance networks, weighted resistance network all adopts the Low Drift Temperature precision resistance network architecture, high 4 rough segmentation angles and low 16 segmentation angles according to trigonometric function just, two jiaos of cosine and synthesize 20 full angles with poor numeral expression formula; Realize the 2V low pressure cosine and sine signal output of 0.001 ° of precision.
Embodiment 3, in the numeral-shaft angle signal conversion method described in embodiment 1: described pattern computing circuit is made up of precision resistance, precision operational-amplifier and front end input relay, receives fixing two-way cosine and sine signal:
, according to output mode signal difference, switch corresponding circuits; After SGND, cos θ, sin θ and CGND signal being amplified in the time of four line signals of rotating transformer output, export to voltage magnitude computing circuit; In the time of three line selsyn signal output, will after SGND ,-sin (θ+240 °) and the amplification of sin θ signal, export to voltage magnitude computing circuit.
Embodiment 4, in numeral-shaft angle signal conversion method described in embodiment 1: described voltage magnitude computing circuit is made up of high-precision linear DAC and precision operational-amplifier, receive four line signals of rotating transformer SGND, cos θ, sin θ and CGND or three line selsyn signal SGND ,-sin (θ+240 °) and sin θ, according to output signal voltage amplitude difference, four line signals of rotating transformer or the three line selsyn signals of output 0.388V-7V.
Embodiment 5, with reference to Fig. 1-4, a kind of numeral-shaft angle signal conversion method, 20 bit digital-sine and cosine change-over circuit receives the excited signal through current mode transformer isolation of outside input and the 20 bit digital angles that DSP sends, produce the cosine and sine signal of 2V normal voltage, after current mode transformer isolation, send to pattern computing circuit; The controlled quentity controlled variable through electromagnetic isolation that pattern computing circuit sends according to DSP, the four line signals of rotating transformer or the three line selsyn signals that produce 7V normal voltage, this signal produces the standard axle angle signal with certain power after voltage magnitude computing circuit and power driving circuit.
The exportable four line signals of rotating transformer of pattern computing circuit or three line selsyn signals, in the time that rotary transformer pattern is exported,
; Directly the sin θ of isolation mutually and SGND, cos θ and CGND are exported to voltage magnitude computing circuit; In the time that selsyn pattern is exported,
?
; By sin θ and-sin (θ+240 °) exports to voltage magnitude computing circuit, and by two SGND and CGND short circuits isolator, exports to voltage magnitude computing circuit.
Voltage magnitude computing circuit is made up of high precision 16 bit linear DAC and precision operational-amplifier, the 7V shaft angle signal of receiving mode computing circuit output, the control command through electromagnetic isolation that output voltage is sent by DSP determines, corresponding output-the 7V of 90V, corresponding output-the 0.388V of 5V is to power driving circuit, and power driving circuit is amplified to this signal the shaft angle signal of final required amplitude and power again.
Based on shaft angle signal self character (when rotary transformer, sine and cosine is isolated mutually) and the protection to DSP and signaling conversion circuit, the shaft angle signal of output needs isolation.In the present invention, digital signal isolation adopts magnetic isolating chip IL715-3 to realize, and compared with the even isolation of light, this chip is without peripheral circuit, slewing rate fast (be 2ns time delay, light be occasionally 2 μ s).Simulating signal adopts current mode transformer isolation, and precision is determined by the precision resistance matching of two-way transformer.Transformer secondary output loop amplifier produces large phase shift to low frequency signal, and low frequency signal is had to inhibiting effect.
Claims (4)
1. numeral-shaft angle signal conversion method, is characterized in that, the circuit of realizing the method comprises numeral-cosine and sine signal change-over circuit, the wide pressure of electronic type wideband SCOTT transformer and DSP digital signal processor;
Numeral-cosine and sine signal change-over circuit is by sub-circuit and rough segmentation the electric circuit constitute; Sub-circuit is low 16 weighted resistance network D/A change-over circuits, and rough segmentation circuit is made up of precision resistance network, accurate amplifier and analog switch; The wide pressure of electronic type wideband SCOTT transformer is made up of pattern computing circuit, voltage magnitude computing circuit and power driving circuit;
Numeral-cosine and sine signal change-over circuit receives the excited signal through current mode transformer isolation of outside input and the 20 bit digital angle θ that DSP digital signal processor sends, produce cosine and sine signal, send to pattern computing circuit through current mode isolating transformer, the control command control front end input relay through electromagnetic isolation that pattern computing circuit sends according to DSP digital signal processor, carry out signal type selection, export four line signals of rotating transformer or three line selsyn signals to voltage magnitude computing circuit, the amplitude control command through electromagnetic isolation that voltage magnitude computing circuit sends according to DSP digital signal processor, the shaft angle signal of output respective magnitudes, the control command through electromagnetic isolation that power driving circuit sends according to DSP digital signal processor is exported shaft angle signal, select the power amplification circuit of relevant voltage section to carry out power, amplitude is amplified, output shaft angle signal, realize the conversion of numeral to shaft angle.
2. numeral-shaft angle signal conversion method according to claim 1, it is characterized in that: numeral-cosine and sine signal change-over circuit is realized by high 4 rough segmentation weighted resistance networks and low 16 segmentation weighted resistance networks, weighted resistance network all adopts the Low Drift Temperature precision resistance network architecture, high 4 rough segmentation angles and low 16 segmentation angles according to trigonometric function just, two jiaos of cosine and synthesize 20 full angles with poor numeral expression formula; Realize the 2V low pressure cosine and sine signal output of 0.001 ° of precision.
3. numeral-shaft angle signal conversion method according to claim 1, is characterized in that, described pattern computing circuit is made up of precision resistance, precision operational-amplifier and front end input relay, receives fixing two-way cosine and sine signal:
, according to output mode signal difference, switch corresponding circuits; After SGND, cos θ, sin θ and CGND signal being amplified in the time of four line signals of rotating transformer output, export to voltage magnitude computing circuit; In the time of three line selsyn signal output, will after SGND ,-sin (θ+240 °) and the amplification of sin θ signal, export to voltage magnitude computing circuit.
4. numeral-shaft angle signal conversion method according to claim 1, it is characterized in that, described voltage magnitude computing circuit is made up of high-precision linear DAC and precision operational-amplifier, receive four line signals of rotating transformer SGND, cos θ, sin θ and CGND or three line selsyn signal SGND ,-sin (θ+240 °) and sin θ, according to output signal voltage amplitude difference, four line signals of rotating transformer or the three line selsyn signals of output 0.388V-7V.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102879021B (en) * | 2012-09-24 | 2014-11-19 | 重庆华渝电气仪表总厂 | Rotary transformer angle code converting method and converter |
| CN103336459B (en) * | 2013-05-08 | 2016-04-27 | 安徽师范大学 | A kind of digital quantizer conversion plan of autosyn/rotary transformer |
| CN103795416B (en) * | 2014-02-27 | 2017-01-11 | 连云港杰瑞电子有限公司 | High-precision digital to resolving convertor |
| CN105180973B (en) * | 2015-10-15 | 2018-02-02 | 连云港杰瑞电子有限公司 | A kind of single-chip numeral signals of rotating transformer conversion method |
| CN107666321B (en) * | 2017-10-17 | 2023-10-24 | 中国电子科技集团公司第四十三研究所 | Parallel binary angle code-two-path orthogonal signal conversion device of D/R converter |
| CN110849258B (en) * | 2019-11-28 | 2021-04-06 | 武汉华之洋科技有限公司 | Angle encoder based on induction synchronizer |
| 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2727705Y (en) * | 2004-08-31 | 2005-09-21 | 江苏自动化研究所 | A digital/axial angle converter |
| CN201467048U (en) * | 2009-07-31 | 2010-05-12 | 北京青云创新科技发展有限公司 | Digital synchronous conversion device |
| CN201773323U (en) * | 2010-09-19 | 2011-03-23 | 武汉凌久电子有限责任公司 | Small dual-speed converter for digital-selsyn/rotary transformer |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0522537A (en) * | 1991-07-17 | 1993-01-29 | Nec Eng Ltd | Facsimile equipment |
| JP3703115B2 (en) * | 1996-05-30 | 2005-10-05 | 多摩川精機株式会社 | Digital / synchro conversion method |
-
2011
- 2011-12-23 CN CN201110438005.9A patent/CN102538832B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2727705Y (en) * | 2004-08-31 | 2005-09-21 | 江苏自动化研究所 | A digital/axial angle converter |
| CN201467048U (en) * | 2009-07-31 | 2010-05-12 | 北京青云创新科技发展有限公司 | Digital synchronous conversion device |
| CN201773323U (en) * | 2010-09-19 | 2011-03-23 | 武汉凌久电子有限责任公司 | Small dual-speed converter for digital-selsyn/rotary transformer |
Non-Patent Citations (6)
| Title |
|---|
| 一种数字-轴角旋转变压器的实现;陈丙勋等;《电子测量与仪器学报》;20051231;197-200页 * |
| 一种采用EPROM的数字-轴角转换方法;孙书鹰等;《火力与指挥控制》;19981231;第23卷(第4期);53-58页 * |
| 孙书鹰等.一种采用EPROM的数字-轴角转换方法.《火力与指挥控制》.1998,第23卷(第4期),53-58页. |
| 实用型数字/轴角转换器的测试与优化设计;程万娟等;《应用科技》;20090331;第36卷(第3期);38-41页 * |
| 程万娟等.实用型数字/轴角转换器的测试与优化设计.《应用科技》.2009,第36卷(第3期),38-41页. |
| 陈丙勋等.一种数字-轴角旋转变压器的实现.《电子测量与仪器学报》.2005,197-200页. |
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