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Method for converting high-precision single-chip digital signal into shaft angle signal

A technology of digital signals and conversion methods, which is applied to measurement devices, instruments, electrical devices, etc., can solve the problems of inability to achieve high-density installation of system components, reduce system reliability, and disperse component distribution, and achieve high integration. The effect of precision and high-density mounting

Active Publication Date: 2012-07-18
连云港杰瑞电子有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. The volume is large, the distribution of components is relatively scattered, and high-density installation of system components cannot be realized, and the volume is relatively large
[0005] 2. Poor reliability, a large number of discrete components are used, and the integration level is low, which reduces the reliability of the system

Method used

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  • Method for converting high-precision single-chip digital signal into shaft angle signal
  • Method for converting high-precision single-chip digital signal into shaft angle signal
  • Method for converting high-precision single-chip digital signal into shaft angle signal

Examples

Experimental program
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Effect test

Embodiment example 1

[0030] Implementation case 1, refer to figure 1 , a high-precision single-chip digital signal to shaft angle signal conversion method, the circuit to realize the method consists of a reference transformer, a linear DA circuit, a trigonometric function curve fitting circuit, a nonlinear segmented proportional circuit, a positive and negative signal selection circuit, Composed of power drive circuit and digital interface circuit; and adopts high-voltage CMOS technology compatible with multi-voltage (±15V power supply can be used, digital interface part is compatible with 5V power supply, and the analog part is controlled by high-low level conversion circuit) to integrate the above circuits in On a single chip; the linear DA circuit is composed of a high-precision 12-bit weighted resistor network D / A conversion circuit, the trigonometric function curve fitting circuit and the nonlinear segmented proportional circuit are composed of a precision resistor network; the reference trans...

Embodiment 2

[0033]Embodiment 2, in the conversion method described in Embodiment 1: the reference signal passes through the peripheral resistance of the reference transformer, and the peripheral input voltage of 0-115V is converted into an input voltage of 2V.

Embodiment 3

[0034] Embodiment 3, with reference to Figure 2-9 , in the conversion method described in embodiment 1 or 2:

[0035] The linear DA circuit decomposes the input transformed reference signal Vref linearly, divides it into sinusoidal signals sinβ and sin (11.25°-β) of angle β and outputs them, and 0°<β<11.25°;

[0036] The trigonometric function curve fitting circuit performs trigonometric function curve fitting on the linear approximation sinusoidal signal output by the linear DA circuit; the trigonometric function of the linear approximation with a large error in the β angle is converted into a rational polynomial approximation with a small error To improve conversion accuracy, and output approximately fitted sinβ, sin (11.25°-β) signals respectively;

[0037] In the nonlinear segmented proportional circuit, the angle α is nonlinearly segmented, 11.25°<α<90°; sinβ is divided into 5 resistors and divided into cos(11.25°+22.5°*n) sinβ, n= 0, 1, 2 or 3; sin (11.25°-β) is divi...

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Abstract

The invention discloses a method for converting a high-precision single-chip digital signal into a shaft angle signal. A circuit for realizing the method is composed of a reference transformer, a linear DA (Direct-Alternating) circuit, a trigonometric function curve fitting circuit, a non-linear segmented proportional circuit, a negative and positive signal selection circuit, a power driving circuit and a digital interface circuit, wherein the circuits are integrated on a single chip by the compatible multivoltage high-voltage CMOS (Complementary Metal Oxide Semiconductors) technology; the linear DA circuit is composed of high-precision 12-bit weighted resistance network D / A conversion circuits; the trigonometric function curve fitting circuit and the non-linear segmented proportional circuit are composed of precise resistance networks; and the reference transformer and the power driving circuit are composed of an operational amplifier and an adjustable peripheral resistance circuit. The method for converting a high-precision single-chip digital signal into a shaft angle signal has the advantages of small circuit volume, good reliability, high integration degree, high conversion precision and strong expandability, a system element can be installed with high precision, and the high-precision single-chip digital signal can be effectively converted into the shaft angle signal.

Description

technical field [0001] The invention belongs to the technical field of signal simulation and testing, in particular to a conversion method from a high-precision single-chip digital signal to an axis angle signal. 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. The existing digital-axis-angle converter can only realize the conversion of one signal type, one signal voltage and one signal frequency. It has single function, low cost performance and poor adaptability, which is not conducive to the promotion and application of angle measurement and control fields. [0003] Syntheses / resolvers are used as shaft angle drive components to provide low-cost, ...

Claims

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Application Information

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IPC IPC(8): G01D5/16G01B7/30
Inventor 杨波陈大科夏伟韩彬
Owner 连云港杰瑞电子有限公司
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