Real-time integral drift compensation alternating integrator and its error control method

Abstract

The invention discloses a real-time integrator drifting compensation alternation-type integrator and an error control method of the real-time integrator drifting compensation alternation-type integrator. The integrator comprises real-time compensation-type integral units, a field-programmable gate array (FPGA) module, switch modules, an analog-digital converter (ADC) module and a digital-analog converter (DAC) module. Real-time integrator drifting compensation-type integrator bodies are adopted for the real-time compensation-type integral units, two-way single-pole double-throw switches are adopted for the switch modules, the two real-time compensation-type integral units carry out alternate integration on differential signals at different time periods, signals output by the integral units are converted into digital signals through the ADC, the digital signals are kept and accumulated in the FGPA, the integral signal splicing is completed, and finally the integral signals are converted into analog signals through the DAC for being output. According to the real-time integrator drifting compensation-type alternation-type integrator, the problems that for an analog integrator, a zero drift, capacitance leakage errors, non-linear errors and operational amplifier saturation exist can be solved.

Description

technical field [0001] The invention relates to the field of integrators, in particular to a real-time integral drift compensation alternating integrator with a working time of up to 1000s and an error control method thereof. Background technique [0002] An electronic integrator is an electronic device that can make the output value at any time equal to the sum of all input values ​​of the input signal before that time, and is used in many occasions. In the tokmak experiment, the principle of magnetic induction is usually used to measure the magnetic field and flux inside the device, so an integrator is needed to integrate the differential signals output by the magnetic probe, the Roco coil and the single-turn ring, so as to realize the plasma Diagnostics and configuration control. usually used as figure 1 As shown in the analog integrator, its integral error mainly includes zero drift, capacitance leakage error and nonlinear error. where, due to the input offset voltage...

AI Technical Summary

Problems solved by technology

[0024] The present invention aims at the deficiencies of the above-mentioned prior art, and provides a real-time integral drift compensation alternate integrator, which is based on a field programmable gate array (FPGA), and can solve the zero point drift, Capacitance leakage error, nonlinear error and operational amplifier saturation; the present invention also provides an error control method for the integrator

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