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Digital-shaft angle signal converting method

A signal conversion and digital signal technology, applied in the direction of digital-to-analog converter, transmission of sensing components using electromagnetic/magnetic devices, etc., can solve the problems of low cost performance, single function, unfavorable angle measurement and application in the field of control, etc. The effect of strong scalability and high conversion accuracy

Active Publication Date: 2014-05-14
连云港杰瑞电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing digital-axis-angle converters can only convert one signal type, one signal voltage, and one signal frequency, and have a single function; although the axis-angle simulator can realize programmable frequency, voltage, and signal type, it only It can achieve 16-bit resolution and 14-bit precision. The product has low cost performance and poor adaptability, which is not conducive to the promotion and application of angle measurement and control fields.

Method used

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Examples

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Effect test

Embodiment example 1

[0024] Implementation case 1, refer to Figure 1-4 , a digital-axis angle signal conversion method, the circuit for realizing the method includes a digital-sincosine signal conversion circuit, an electronic wide-bandwidth wide-voltage SCOTT transformer and a DSP digital signal processor;

[0025] The digital-sincosine signal conversion circuit is composed of a subdivision circuit and a rough division circuit; the subdivision circuit is a low 16-bit weight resistance network D / A conversion circuit, and the rough division circuit is composed of a precision resistance network, a precision operational amplifier and an analog switch; The electronic wide-band wide-voltage SCOTT transformer is composed of a mode operation circuit, a voltage amplitude operation circuit and a power drive circuit;

[0026] The digital-sincosine signal conversion circuit receives the external input excitation signal isolated by the current-type transformer and the 20-bit digital angle θ sent by the DSP d...

Embodiment 2

[0027] Embodiment 2, in the digital-axis angle signal conversion method described in Embodiment 1: the digital-sin-cosine signal conversion circuit is realized by a high 4-bit coarse weighted resistance network and a low 16-bit subdivision weighted resistance network, and the weighted resistance network is equal to Adopt low-temperature drift precision resistance network architecture, high 4-bit rough angle and low 16-bit subdivision angle are synthesized into 20-bit full angle according to trigonometric function positive and cosine angle sum and difference digital expression; realize 0.001° precision 2V low voltage positive Cosine signal output.

Embodiment 3

[0028] Embodiment 3, in the digital-axis angle signal conversion method described in Embodiment 1: the mode operation circuit is composed of a precision resistor, a precision operational amplifier and a front-end input relay, and receives two fixed sine and cosine signals: According to different output signal modes, switch the corresponding circuit; when the four-wire resolver signal is output, the SGND, cosθ, sinθ and CGND signals are amplified and then output to the voltage amplitude calculation circuit; when the three-wire auto-synchronizer signal is output, SGND , -sin(θ+240°) and sinθ signals are amplified and output to the voltage amplitude operation circuit.

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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 [0001] The invention belongs to the technical field of signal simulation and testing, in particular to a digital-shaft angle signal conversion method. Background technique [0002] Common shaft angle signals include synchro signals and resolver signals. The digital-shaft angle converter converts digital angle signals into synchro signals or resolver signals. It is the core device in modern shaft angle electronic conversion technology. , Widely used in aerospace, aviation, radar, fire control and industrial automation fields. Existing digital-to-axis-angle converters can only convert one signal type, one signal voltage, and one signal frequency, and have a single function; although the axis-angle simulator can realize programmable frequency, voltage, and signal type, it only It can achieve 16-bit resolution and 14-bit precision, and the product has low cost performance and poor adaptability, which is not conducive to popularization and application in the fiel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D5/14H03M1/66
Inventor 奚志林李云飞寇志强张明
Owner 连云港杰瑞电子有限公司
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