Novel multi-channel data acquisition system with function of noise reduction
A data acquisition system, a new type of technology, applied in signal transmission systems, electrical signal transmission systems, instruments, etc., can solve problems such as signal quality deterioration, measurement errors, formation of ground loops, etc., to avoid direct electrical connection, system safety, Avoid the effect of influence
Inactive Publication Date: 2016-07-13
CHENGDU BAOMIHUA INFORMATION TECH
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Problems solved by technology
The earlier multi-channel time-division multiplexing data acquisition system can only realize the cyclic acquisition of multiple signals, but cannot realize the acquisition of signals of each channel at the same time, and the data acquisition rate is not very high.
Sensors and other devices often generate noise, and the presence of noise degrades the quality of the signal
Since there is a potential difference between the data acquisition device and the signal ground, if isolation is not performed, a ground loop may be formed, resulting in measurement errors
Method used
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[0015] The technical solution of the present invention will be described clearly and completely through the following embodiments. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.
[0016] Such as figure 1 A novel multi-channel data acquisition system that can reduce noise is shown, including multiple sensors, multiple filters, multiple couplers, multiple analog switches, sample-and-hold modules, A / D converters, pre-processing units, In an industrial computer, each sensor is connected to a corresponding filter, the filter is connected to a coupler, and the coupler is connected to a multi-channel analog switch, and the multi-channel analog switch is connected to a sampling and holding module, and the sampling and holdin...
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The invention relates to a novel multi-channel data acquisition system with the function of noise reduction. The system comprises multiple sensors, multiple filters, multiple couplers, a multi-channel analog switch, a sampling and holding module, an A / D (analog / digital) converter, a preprocessing unit and an industrial personal computer, wherein each sensor is connected with the corresponding filter; the filters are connected with the couplers; the couplers are connected with the multi-channel analog switch; the multi-channel analog switch is connected with the sampling and holding module; the sampling and holding module is connected with the A / D converter; the A / D converter is connected with the preprocessing unit; the preprocessing unit transmits data to the industrial personal computer. With the adoption of the multi-channel synchronous data acquisition system, signals of all channels at the same moment can be acquired, and the data acquisition speed is high; the sampling and holding module is arranged, and accordingly, digital signals obtained after A / D conversion can correctly reflect original analog signals.
Description
technical field [0001] The invention relates to the technical field of data acquisition, in particular to a novel multi-channel data acquisition system capable of reducing noise. Background technique [0002] Data acquisition technology is widely used in communication, radar, aerospace, industry and other fields. With the rapid development of microelectronic technology and computer technology, the performance and function of data acquisition system are continuously enhanced. In modern signal processing systems, in order to analyze the system better, it is often necessary to collect some related signals synchronously while collecting key signals. The earlier multi-channel time-division multiplexing data acquisition system can only realize the cyclic acquisition of multiple signals, but cannot realize the acquisition of signals of each channel at the same time, and the data acquisition rate is not very high. Sensors and other devices often generate noise, and the presence of...
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IPC IPC(8): G08C19/00
CPCG08C19/00
Inventor 梁庆欢陈长明杜跃武郭勇年
Owner CHENGDU BAOMIHUA INFORMATION TECH