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Data acquisition card capable of automatically adjusting sampling rate

A data acquisition card and automatic adjustment technology, applied in control/adjustment systems, program control, instruments, etc., can solve the problems of low data acquisition quality and data acquisition efficiency

Active Publication Date: 2018-01-05
JILIN UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on this, it is necessary to provide a data acquisition card that automatically adjusts the sampling rate for the problems of low data acquisition quality and data acquisition efficiency in existing data acquisition methods

Method used

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  • Data acquisition card capable of automatically adjusting sampling rate
  • Data acquisition card capable of automatically adjusting sampling rate
  • Data acquisition card capable of automatically adjusting sampling rate

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Embodiment Construction

[0020] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0021] In one of the examples, as figure 1 and figure 2 As shown, the data acquisition card that automatically adjusts the sampling rate includes a signal acquisition module 100, a signal conditioning module 200, a first filtering and shaping unit 300, a single-chip microcomputer 400 and a USB interface chip 500, and the first filtering and shaping unit 300 includes a first waveform shaping Module 301 and the first low-pass filter module 302, described single-chip microcomputer 400 comprises single-chip microcomputer core 401, first timer 402, second timer 403, the third timer 404, the first ADC (analog-to-digital conversion) module 405, the first A DMA module 406 , a second DMA module 407 , a memory 408 and an FSMC interface module 409 .

[0022] In this embodiment, the signal acquisition module 100 is used to ...

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Abstract

The invention relates to a data acquisition card capable of automatically adjusting a sampling rate and belongs to the data acquisition technology field. The data acquisition card comprises a signal acquisition module, a signal conditioning module, a first filtering shaping module, a single-chip micro computer and a USB interface chip, wherein the first filtering shaping unit comprises a first waveform shaping module and a first low pass filtering module, and the single-chip microcomputer comprises a single-chip microcomputer core, a first timer, a second timer, a third timer, a first ADC module, a first DMA module, a second DMA module, a memory and an FSMC interface module. The data acquisition card is advantaged in that the sampling rate can be automatically adjusted according to frequency of acquired simulation input signals, flexible sampling of the acquired simulation input signals is realized, redundancy data can be effectively removed, the acquisition data bulk is reduced, and the data acquisition time and data storage cost of the data acquisition card can be saved to a maximum degree.

Description

technical field [0001] The invention relates to the technical field of data acquisition, in particular to a data acquisition card for automatically adjusting the sampling rate. Background technique [0002] All kinds of control systems are inseparable from the collection, transmission and processing of data, and the collection of data is located at the forefront of the entire control system, so it is also a very important part of the system design. [0003] Due to the high data transmission rate of high-speed data acquisition, the storage speed of large-capacity data memory is limited, and the storage speed is not constant, and there will be a phenomenon of data loss due to the large amount of data. In the case where the frequency range of the measured signal changes greatly , using an excessively high sampling rate to collect low-frequency measured signals will cause data redundancy, which will increase the cost of data storage, and is not conducive to data analysis, and fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/042
Inventor 张秉仁刘卫平杨媛如王瑞健张希明
Owner JILIN UNIV
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