High-speed multichannel real-time analog quantity detection system with enhanced data buffer memory

A technology of data buffering and real-time detection, which is applied in the direction of measurement, measuring devices, and instruments using digital measurement technology, which can solve the problems of low scalability, poor real-time detection performance, and low delay accuracy of analog quantity detection systems, and achieve the realization of Synchronous high-speed sampling, improving real-time performance, and reducing the effect of sampling delay

Inactive Publication Date: 2016-12-21
CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a high-speed multi-channel analog real-time detection system with enhanced data cache for the above-mentioned shortcomings of poor real-time detection performance and low precision when the existing analog detection system performs analog detection. It solves the large delay and low precision of the traditional analog detection system in the case of high speed, multi-channel and synchronous sampling, and solves the problem of low scalability of the traditional analog detection system in the case of synchronous sampling, effectively improving the The accuracy and real-time performance of the analog quantity detection system has a strong channel expansion capability and strong anti-interference ability

Method used

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  • High-speed multichannel real-time analog quantity detection system with enhanced data buffer memory
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  • High-speed multichannel real-time analog quantity detection system with enhanced data buffer memory

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specific Embodiment approach

[0030] see figure 1 , figure 1 It is a structural block diagram of a high-speed multi-channel analog real-time detection system with enhanced data cache, the analog real-time detection system includes:

[0031] Signal conditioning circuit, which converts the external input analog signal into a directly sampled voltage or current signal;

[0032] The detection chip adopts the analog quantity detection circuit of the ADC chip, which is connected with the output terminal of the signal conditioning circuit, and converts the sampled voltage or current signal into a corresponding digital quantity signal;

[0033] FPGA, connected to the output terminal of the analog quantity detection circuit, see figure 2 , figure 2It is a structural block diagram of FPGA. There are multiple ADC driver modules, multiple FIR digital filters and an enhanced dual-port RAM storage management module inside the FPGA. Each ADC driver module corresponds to a FIR digital filter, and each The ADC drive ...

Embodiment 1

[0046] Embodiment 1: In the high-speed multi-channel analog real-time detection system with enhanced data cache provided in this embodiment, 8 ADC drive modules, 8 FIR digital filters and 1 enhanced Type dual-port RAM storage management module, each ADC driver module corresponds to a FIR digital filter, and each ADC driver module corresponds to an ADC chip of an analog quantity detection circuit. Among them, the ADC driver module is used to drive the ADC chip and receive the digital signal output by the ADC chip, the FIR digital filter digitally filters the digital signal output by the ADC driver module, and the enhanced dual-port RAM storage management module filters the filtered Continuous storage management of digital signals. This embodiment can simultaneously detect the analog quantities of 8 channels in real time.

Embodiment 2

[0047] Embodiment 2: In the high-speed multi-channel analog real-time detection system with enhanced data cache provided in this embodiment, 30 ADC drive modules, 30 FIR digital filters and 1 enhanced Type dual-port RAM storage management module, each ADC driver module corresponds to a FIR digital filter, and each ADC driver module corresponds to an ADC chip of an analog quantity detection circuit. Among them, the ADC driver module is used to drive the ADC chip and receive the digital signal output by the ADC chip, the FIR digital filter digitally filters the digital signal output by the ADC driver module, and the enhanced dual-port RAM storage management module filters the filtered Continuous storage management of digital signals. This embodiment can simultaneously detect the analog quantities of 30 channels in real time.

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Abstract

The invention relates to a high-speed multichannel real-time analog quantity detection system with an enhanced data buffer memory. The system comprises a signal conditioning circuit, an analog detection circuit, an analog quantity detection circuit, an FPGA and a DSP, wherein the signal conditioning circuit converts an analogy signal input from the external into a directly sampling voltage or current signal; the analog quantity detection circuit is connected with the output end of the signal conditioning circuit, and converts the sampling voltage or current signal into a corresponding digital signal; the FPGA is connected with the output end of the analog quantity detection circuit, and is internally provided with an ADC driving module, an FIR digital filter and an enhanced double-port RAM storage management module, multiple ADC chips are operated rapidly, and data is filtered and stored; and the DSP is connected with the enhanced double-port RAM storage management module, reads the digital signals from the enhanced double-port RAM storage management module, processes the read signal, and communicates with the external. Under the high-speed, multichannel and synchronous sampling condition, delayed time is reduced, the precision is high, the precision and instantaneity of the detection system are improved, and the channel expansion capability and the anti-interference capability are high.

Description

technical field [0001] The invention belongs to the electrical technical field of railway vehicles, and relates to rail vehicle analog quantity detection equipment, in particular to a high-speed multi-channel analog quantity real-time detection system, which is suitable for high-speed, high-precision, multi-channel analog quantity synchronous detection occasions, capable of In response to high-speed sampling in the complex environment of vehicles and fast calculation of complex sample data, it has high anti-interference ability and flexible scalability, and can meet the needs of real-time control in complex industrial environments. Background technique [0002] The analog quantity detection system is a basic link in the train state detection equipment, which plays the role of analog quantity detection, data processing and calculation, and its processing results are used in state display, variable monitoring, fault diagnosis and other links. [0003] The traditional analog qu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D21/00G01R19/25
CPCG01D21/00G01R19/25
Inventor 李震孙国斌宋波
Owner CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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