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High-speed multichannel current-voltage multiplexing collection unit and data collection method

A technology of current-voltage and acquisition unit, applied in the field of high-speed multi-channel current-voltage multiplexing acquisition unit and data acquisition, can solve the problems of data reading and writing errors, difficulty in ensuring data reading and control speed, slow communication speed of dual-port RAM, etc. , to achieve the effects of ultra-low power consumption, low data acquisition and transmission rate, and improved data transmission speed

Active Publication Date: 2015-04-29
CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 2) This scheme is prone to data read and write errors caused by address data contention
[0006] 3) The communication speed of dual-port RAM is slow, and it is difficult to guarantee the data reading and control speed

Method used

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  • High-speed multichannel current-voltage multiplexing collection unit and data collection method
  • High-speed multichannel current-voltage multiplexing collection unit and data collection method

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with the accompanying drawings.

[0037] attached figure 1 It is a structural schematic diagram of the present invention, composed of figure 1 It can be seen that the high-speed multi-channel current and voltage multiplexing acquisition unit includes a current / voltage acquisition unit composed of interconnected signal conditioning circuits and ADC sampling circuits, and also includes a backplane, and FPGA, DSP and clock modules installed on the backplane , There are multiple current / voltage acquisition units, all of which are connected to the FPGA, the FPGA is connected to the DSP, and the clock module is connected to the FPGA and the DSP respectively. Carry on data communication through LinkPort between PFGA and DSP.

[0038] attached figure 2 Schematic diagram of the signal conditioning circuit. The signal conditioning circuit includes a first resistor R1, a second resistor R2, a filter capacito...

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Abstract

The invention relates to a high-speed multichannel current-voltage multiplexing collection unit. The high-speed multichannel current-voltage multiplexing collection unit comprises a plurality of current / voltage collection units respectively consisting of a signal conditioning circuit and an ADC sampling circuit which are connected with each other. The high-speed multichannel current-voltage multiplexing collection unit is characterized by also comprising a backboard, and an FPGA, a DSP and a clock module, which are installed on the backboard, all current / voltage collection units are connected to the FPGA, the FPGA is connected to the DSP, and the clock module is respectively connected with the FPGA and the DSP. The high-speed multichannel current-voltage multiplexing collection unit can be applied to a system with the FPGA and DSP which are distributed on different circuit boards, the current collection and voltage collection multiplexing can be realized by the signal conditioning circuit, and multiple circuits of current or voltage data can be simultaneously sampled. Data transmission is carried out by virtue of a LinkPort, so that the data transmission speed is greatly increased, and the data transmission speed can reach 400Mbit / s.

Description

technical field [0001] The invention belongs to the technical field of data acquisition, and relates to a high-speed multi-channel current and voltage multiplexing acquisition unit and a data acquisition method. Background technique [0002] During the design and debugging process of the EMU traction system, it is necessary to monitor various current or voltage analog quantities in the traction system in real time, including input network voltage, network current, intermediate voltage of the converter, three-phase current of the inverter, etc. These key analog quantities need to be accurately collected and transmitted to the processor quickly and reliably, otherwise the traction system cannot be accurately controlled. But the existing current or voltage acquisition system cannot meet its requirements. [0003] The current current or voltage acquisition unit is usually composed of an analog-to-digital conversion module, FPGA, and DSP, and a dual-port RAM is used between the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/25G08C19/00
Inventor 王磊张鹏孙国斌盖猛
Owner CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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