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Anti-electromagnetic interference accurate measurement acquisition method for analog signal

An analog signal, anti-electromagnetic interference technology, used in measuring devices, liquid/fluid solids measurement, engine lubrication, etc., can solve problems such as jumping, easy distortion of analog signals, eliminate electromagnetic interference signals, and ensure accurate Measure the effect of collecting, eliminating effects

Active Publication Date: 2018-09-07
CHINA YANGTZE POWER
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Problems solved by technology

[0003] In order to solve the existing problem that the analog signal measured by a single sensor is easy to be distorted and jump phenomenon occurs, the present invention provides an anti-electromagnetic interference accurate measurement and acquisition method of the analog signal, based on the output signal of the dual sensors, the differential method is used to eliminate the external Electromagnetic interference, accurate measurement of analog signals

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Embodiment Construction

[0013] An anti-electromagnetic interference analog signal accurate measurement and acquisition method adopts two identical analog sensors, one analog sensor is installed in the forward direction, and the other analog sensor is installed in the reverse direction; the measurement output signals of the two analog sensors are Different core wires in the same cable are used to transmit to the analog input module of the controller; the analog signals of the two analog sensors collected by the controller are processed for numerical value averaging, because the two analog sensors are mutually The reverse installation actually performs differential processing on the measurement acquisition signal.

[0014] Positive installation means that the displacement measurement signal output by the sensor increases as the displacement increases.

[0015] Reverse installation means that the displacement measurement signal output by the sensor decreases as the displacement increases.

[0016] The ...

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Abstract

Provided is an anti-electromagnetic interference accurate measurement acquisition method for an analog signal. Two identical analog sensors are adopted, one analog sensor is installed in the forward direction, and the other analog sensor is installed in the reverse direction; measurement output signals of the two analog sensors are sent to an analog input module of a controller through different core wires in the same cable; the analog signals of the two analog sensors collected by the controller are averaged for numerical processing, and due to the fact that the two analog sensors are mutually reversely installed, in fact, differential processing is conducted on a measuring acquisition signal. The method is based on a dual sensor output signal, adopts a differential method to eliminate external electromagnetic interference, and accurately measures the analog signal.

Description

technical field [0001] The invention provides an anti-electromagnetic interference analog signal accurate measurement and acquisition method, which adopts a differential method to eliminate external electromagnetic interference and accurately measure the analog signal. Background technique [0002] At present, the sensor output circuit used for analog signal measurement and acquisition has poor anti-electromagnetic interference capability. The long-distance transmission of 4-20mA or 0-20mA current signal and 0-5V voltage signal is easily affected by the electromagnetic interference of the surrounding environment, especially When there is a strong electromagnetic field interference source such as a motor around, the analog signal collected by the measurement is easily distorted, resulting in a jump phenomenon. SUMMARY OF THE INVENTION [0003] In order to solve the problem that the analog signal measured by a single sensor is easy to be distorted and the jump phenomenon occ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F23/00
CPCG01F23/806Y02E30/30
Inventor 涂勇帅小乐沈博渊池成虎皮萃
Owner CHINA YANGTZE POWER