Multi-channel data collection unit

A data acquisition unit, the technology of the acquisition unit, applied in the direction of data acquisition and recording, can solve the problems of high price, high power consumption of the chip set, unsuitable for long-term use, etc., and achieve the effect of low power consumption, low cost and high performance

Inactive Publication Date: 2011-09-28
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is also because this is a special chipset, which is specially produced by CirrusLogic Corporation of the United States and monopolized ...

Method used

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Embodiment Construction

[0019] Embodiments of the multi-channel data acquisition unit of the present invention will be described below in conjunction with the accompanying drawings.

[0020] A multi-channel data acquisition unit proposed by the present invention is characterized in that the acquisition unit is composed of multiple acquisition channels, a test channel and an acquisition unit control module; each acquisition channel includes a conventional filter circuit and a voltage protection circuit. The conditioning circuit, electronic switch and ΔΣ analog-to-digital converter, the test channel is composed of a ΔΣ digital-to-analog converter, and the control module of the acquisition unit is realized based on a programmable logic controller (FPGA) chip; multiple sensor signals to be tested are respectively It is connected with an acquisition channel, and the multiple acquisition channels are connected with the acquisition unit control module; the input end of the ΔΣ digital-to-analog converter is c...

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Abstract

The invention relates to a multi-channel data collection unit, belonging to the technical field of data collection in testing and measurement. The collection unit consists of a plurality of collection channels, a testing channel and a collection unit control module, wherein each collection channel comprises a conditioning circuit which consists of a conventional filter circuit and a voltage protective circuit, an electric switch and a delta sigma analog to digital converter; the testing channel is formed by a delta sigma digital to analog converter; the collection unit control module is realized on the basis of a programmable logic controller; the plurality of collection channels are connected with the collection unit control module; the input end of the delta sigma digital to analog converter is connected with the output end of the collection unit control module; and the output end of the delta sigma digital to analog converter is connected with each electric switch and each delta sigma analog to digital converter of the collection channel respectively. By the multi-channel data collection unit, high dynamic range, low input nose, low harmonic distortion, low crosstalk and high common mode rejection ratio can be realized, and the requirement of low power consumption and low cost can be fulfilled.

Description

technical field [0001] The invention belongs to the technical field of data acquisition in test and measurement, and particularly relates to a device that can realize high dynamic range, low input noise, low harmonic distortion, low crosstalk and high common mode rejection ratio, and can meet the requirements of low power consumption and low cost A data acquisition unit and a data acquisition method. Background technique [0002] The data acquisition unit is an essential component in the test system based on computer technology, and its performance index directly affects the performance of the test system. In the test and measurement, there is a large class of signals that require high performance indicators of the data acquisition unit, mainly including high dynamic range, low input noise, low harmonic distortion, high common mode rejection ratio and low crosstalk between multiple channels, etc. At the same time, if it is used in the test and measurement system used in the...

Claims

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Application Information

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IPC IPC(8): G06F17/40
Inventor 邓焱彭卓熊剑平马骋贾惠波
Owner TSINGHUA UNIV
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