Analog quantity input board card and analog quantity acquisition method

An input board and analog technology, applied in the field of rail transit, can solve the problem of inability to meet high voltage acquisition, and achieve the effects of high reliability, improved stability, and strong anti-interference ability

Inactive Publication Date: 2016-07-13
CRRC DALIAN R & D CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides an analog input board and an analog acquisition method to solve the problem that the analog input board in the prior art cannot meet high voltage acquisition

Method used

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  • Analog quantity input board card and analog quantity acquisition method
  • Analog quantity input board card and analog quantity acquisition method
  • Analog quantity input board card and analog quantity acquisition method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] figure 1 It is a schematic structural diagram of the analog output board provided by Embodiment 1 of the present invention. Such as figure 1 As shown, the present invention provides an analog input board including: a high-voltage isolated power supply circuit 1, a high-voltage differential processing circuit 2, an isolated acquisition circuit 3, a low-voltage signal processing circuit 4, a processor 5, and a controller LAN drive circuit 6.

[0027] Wherein, the output end of the high-voltage isolated power supply circuit 1 is connected to the power supply input end of the high-voltage differential processing circuit 2 , and the high-voltage isolated power supply 1 is used to supply power to the high-voltage differential processing circuit 2 .

[0028] The output end of the high-voltage differential processing circuit 2 is connected to the input end of the isolation acquisition circuit 3, and the high-voltage differential processing circuit 2 is used to step down the hi...

Embodiment 2

[0037] This embodiment makes further supplementary description to above-mentioned embodiment, figure 2 A schematic structural diagram of a high-voltage isolated power supply circuit provided in Embodiment 2 of the present invention, as shown in figure 2 As shown, the high voltage isolated power supply circuit 1 includes a first resistor 1101, a first capacitor 1201, a second capacitor 1202, a third capacitor 1203, a fourth capacitor 1204, a fifth capacitor 1205, a first control chip 1001, a sixth capacitor 1206 and The first anti-reverse diode 1301.

[0038]Specifically, the first resistor 1101, the first capacitor 1201, the second capacitor 1202, and the third capacitor 1203 are arranged in parallel between the first input terminal 111 and the second input terminal 112 of the high-voltage isolated power supply circuit 1, wherein the first resistor 1101 It can be a piezoresistor, which is used to prevent damage to the circuit caused by a voltage mutation input to the high-v...

Embodiment 3

[0059] This embodiment provides an analog quantity acquisition method, Figure 6 A schematic flow chart of the analog output method provided by Embodiment 3 of the present invention, such as Figure 6 As shown, the method of analog quantity acquisition includes:

[0060]In step 301, the high-voltage differential processing circuit outputs a first low-voltage analog signal to the isolated acquisition circuit.

[0061] Specifically, the high-voltage differential processing circuit collects the high-voltage analog signal as a high-voltage signal of 0-74V from the external device, and the first low-voltage analog signal output by the high-voltage differential processing circuit after stepping down is a voltage of 0-10V.

[0062] Step 302, the isolation acquisition circuit isolates the high-voltage differential processing circuit and the low-voltage signal processing circuit, and linearly processes the first low-voltage analog signal to generate a second low-voltage analog signal,...

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PUM

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Abstract

The invention discloses an analog quantity input board card and an analog quantity acquisition method. The analog quantity input board card includes a high voltage isolation power source circuit, a high voltage differential processing circuit, an isolation acquisition circuit, a low voltage signal processing circuit, a processor and a controller local area network driving circuit. According to the analog quantity input board card of the invention, the high voltage differential processing circuit acquires high voltage signals of external equipment and performs voltage reduction processing on the acquired high voltage signals; the isolation acquisition circuit isolates the high voltage differential processing circuit and the low voltage signal processing circuit; and therefore, strong interference on rear circuits caused by the high voltage signals of the external equipment can be avoided, and the stability of the whole analog quantity input board card can be improved. The analog quantity input board card and the analog quantity acquisition method have the advantages of high reliability and strong anti-interference ability.

Description

technical field [0001] The invention relates to the field of rail transportation, in particular to an analog input board and an analog acquisition method. Background technique [0002] In the control system of the train network, it is necessary to collect the current and voltage analog quantities of external equipment, and then convert them into digital quantities for subsequent processing. Among them, the analog input board is an important part of the remote input and output module, responsible for the acquisition of analog quantities enter. [0003] At present, the voltage of the external equipment collected by the analog input board of the network control system of Chinese trains is generally between 0-15V, which cannot meet the needs of high-voltage collection in other countries. Contents of the invention [0004] The invention provides an analog input board and an analog acquisition method, which are used to solve the problem that the analog input board in the prior ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/042
Inventor 杨军陶冶
Owner CRRC DALIAN R & D CO LTD
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