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A Digital Integrator for Magnetic Field Measurement of Superconducting Cyclotron

A digital integrator and cyclotron technology, applied in the field of digital integrators, can solve problems such as integral leakage of integrators, achieve the effect of overcoming the upper limit of integration and reducing costs

Active Publication Date: 2018-04-20
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of integral leakage in the integrator due to the leakage resistance of the capacitor, and propose a digital integrator by improving the working principle of the digital analog integrator

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  • A Digital Integrator for Magnetic Field Measurement of Superconducting Cyclotron
  • A Digital Integrator for Magnetic Field Measurement of Superconducting Cyclotron
  • A Digital Integrator for Magnetic Field Measurement of Superconducting Cyclotron

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Embodiment Construction

[0015] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0016] Such as figure 1 Shown, digital integrator of the present invention comprises: front-end amplifying circuit PGA (1), analog active integration circuit (2), window comparator circuit (3), fast discharge circuit (4), adjust balance circuit (5), AD / DA digital-to-analog conversion circuit (6), FPGA digital programmable gate circuit (7), 50MHz high-speed crystal oscillator and 10MHz high-precision crystal oscillator circuit (8), RS232 serial port communication circuit (9).

[0017] The signal first enters the front-end amplifier circuit PGA (1); the output signal of the front-end amplifier circuit PGA (1) enters the analog active integration circuit (2); The active integral circuit (2); the window comparator circuit (3) is connected to the output terminal of the analog active integral circuit (2) to judge whether the voltage value at both ends of t...

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Abstract

The invention relates to a digital integrator for measuring a superconductive cyclotron magnetic field. The magnitude of input signals is adjusted through an appropriate pre-stage amplification circuit PGA, and signals amplified are integrated on a simulation active integrator. The output voltage of the integrator is connected to one window comparator. A set of threshold voltage is set, and once the capacitance reaches threshold, signals are output to FPGA. The FPGA determines the signals and controls a rapid discharging circuit, and voltage on the two ends of a capacitor is rapidly released to zero. A new integral period is started. Charging and discharging times of the capacitor are obtained, and residual voltage is obtained through AD. The magnitude of input signals can be obtained through proportional conversion. The digital integrator is applicable to coils and other long signal output type sensors, and measures magnetic field and current. The digital integrator has the advantages of high efficiency, high precision and low cost.

Description

technical field [0001] The invention relates to a digital integrator for the magnetic field measurement of a superconducting cyclotron. It belongs to the technical field of electronic circuits. Background technique [0002] In the process of measuring current, magnetic field, etc. by using coil methods such as probing coils, rotating coils, flipping coils, Rogowski coils, long wires, and magnetic probes, the integrator is a key module for receiving and processing output signals. Common integrators include three categories: analog, digital, and digital-analog combination: digital integrators use high-speed, high-precision ADCs for sampling, and cooperate with various algorithms to perform numerical calculations in processors such as high-speed FPGAs or high-speed DSPs. The cost of hardware and software is relatively high, and high-speed, high-precision ADCs are subject to restrictions such as foreign embargoes on domestic products. In contrast, the analog integrator has bee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D1/08H03K19/00
CPCG01D1/08H03K19/00
Inventor 殷治国宫鹏飞付晓亮张天爵李明
Owner CHINA INSTITUTE OF ATOMIC ENERGY