Multichannel low-current collection method and system based on single chip microcomputer control

A single-chip microcomputer control and acquisition method technology, applied in the direction of using digital measurement technology for measurement, etc., can solve the problems of the integrity of the collected data, the influence of accuracy, the complexity of setting and modifying parameters, and the long collection interval, so as to achieve convenient historical data query, The effect of low power consumption and simple structure

Inactive Publication Date: 2015-07-15
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

At present, most general-purpose data acquisition systems use analog switches to switch channels. The resistance is large, and each channel is not completely independent. Most of them can only collect some general signals. The product has strong versatility, but it

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  • Multichannel low-current collection method and system based on single chip microcomputer control
  • Multichannel low-current collection method and system based on single chip microcomputer control
  • Multichannel low-current collection method and system based on single chip microcomputer control

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Experimental program
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Embodiment

[0057] The first step: the single-chip processor 6 initializes settings, and sets the acquisition mode and acquisition frequency of the A / D data sampling conversion circuit 5 .

[0058]Second step: the single-chip processor 6 judges the working mode, and when the working mode is a non-acquisition mode, the system enters a sleep state; when the working mode is a collection mode, the single-chip processor 6 outputs a control signal to the multi-channel selection control circuit 2, and selects the collection aisle.

[0059] Step 3: The multi-channel relay switching circuit 3 collects the channel current signal whose state is "on", and outputs it to the current conversion voltage circuit 4 .

[0060] Step 4: The current conversion voltage circuit 4 converts the small current into a voltage by connecting a high-precision resistor in series, and outputs it to the A / D data sampling conversion circuit 5; the A / D data sampling conversion circuit 5 processes the voltage and performs A / D...

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Abstract

The invention discloses a multichannel low-current collection system based on single chip microcomputer control. The system comprises a multi-channel relay switching circuit, a multi-channel selection control circuit, a multi-channel sensor, a current-to-voltage conversion circuit, an A/D (analog/digital) sampling switching circuit, a single chip microcomputer processor, an SD card storage circuit and an LED nixie tube display circuit. Multi-channel low current can be collected and stored in real time, a single chip microcomputer is adopted for control, an interface circuit is used for communication with an upper computer, and collected data are automatically uploaded to the upper computer through the interface circuit. The system is simple in structure, easy to implement, higher in accuracy, small in error and capable of being widely applied to a multichannel low-current collection circuit which has higher requirements for accuracy of collection result and is easy to expand.

Description

technical field [0001] The invention relates to a small current real-time collection system, in particular to a multi-channel small current collection method and system based on single-chip microcomputer control. Background technique [0002] In the fields of laboratories, automatic detection systems, and industrial control systems, various acquisition systems that meet different needs are required to achieve computer-based on-site data acquisition. At present, most general-purpose data acquisition systems use analog switches to switch channels. The resistance is large, and each channel is not completely independent. Most of them can only collect some general signals. The product has strong versatility, but it is suitable for small Current acquisition has the disadvantages of long acquisition interval, complicated setting and modification parameters, poor applicability, low precision, and large error, which greatly affects the integrity and accuracy of the collected data. ...

Claims

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Application Information

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IPC IPC(8): G01R19/25
Inventor 覃荷瑛罗伯光韦昌富张金团徐辉华
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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