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Data Acquisition System Based on Digital Quantity Conditioning

A technology of digital quantities and data streams, applied in the field of data acquisition systems based on digital quantity conditioning, can solve problems such as high precision and difficulty, and achieve high modifiability and portability

Active Publication Date: 2021-03-30
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This function is realized by DAC in the existing signal conditioning method. The accuracy of the DC signal is guaranteed by the performance of the DAC and related devices. It is difficult to achieve higher accuracy.

Method used

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  • Data Acquisition System Based on Digital Quantity Conditioning
  • Data Acquisition System Based on Digital Quantity Conditioning
  • Data Acquisition System Based on Digital Quantity Conditioning

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Embodiment

[0022] figure 2 It is a structural diagram of a specific embodiment of the data acquisition system based on digital quantity conditioning in the present invention. Such as figure 2 As shown, the data acquisition system based on digital quantity conditioning in the present invention includes an AC-DC coupling module 201 , an attenuation module 202 , an ADC module 203 , a digital quantity conditioning module 204 , a data processing module 205 and a host computer 206 .

[0023] The AC-DC coupling module 201 is used to couple the analog input signal according to the AC-DC coupling mode selection signal set by the user, and send the coupled analog signal to the attenuation module 202 .

[0024] The attenuation module 202 is used to attenuate the received analog signal according to a preset attenuation factor, and send the attenuated analog signal to the ADC module 203 . In this embodiment, the corresponding amplitude gear is selected according to the amplitude of the analog sig...

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Abstract

The invention discloses a data acquisition system based on digital quantity conditioning. An AC-DC coupling module is used to perform AC-DC coupling on an analog input signal, and then attenuated by an attenuation module. The obtained analog signal is collected by an ADC module, and the collected signal is It is sent to the digital quantity conditioning module implemented by FPGA, and the acquisition signal is conditioned by the binary digital quantity processing method, and the obtained conditioning signal is processed by the data processing module and then sent to the host computer for display. The invention improves the accuracy of the signal conditioning by performing digital quantity conditioning on the collected signal, and avoids the influence of the unimprovable parameter index brought by the hardware conditioning circuit on the performance of the design system.

Description

technical field [0001] The invention belongs to the technical field of data acquisition systems, and more specifically relates to a data acquisition system based on digital quantity conditioning. Background technique [0002] The signal conditioning circuit is a necessary part of the analog signal acquisition circuit in the power control system. After signal conditioning, the analog signal is converted into the electrical quantity required by the user and sent to the sampling chip or the system's own analog-to-digital converter. Commonly used to deal with different amplitude ranges and different sampling signal frequencies of digital oscilloscopes, rough conditioning of analog signals is required before entering the collected data to meet the needs of the acquisition chip design and output the quantized results of the ADC. If and only when the user needs to adjust the display effect of the analog signal, the corresponding control command can be sent through the host computer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/042
CPCG05B19/042
Inventor 程玉华许波陈凯何小双王伊凡苟轩赵佳唐宇
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA