Analog quantity transformation output method for digital display meter
An output method and technology of digital display meters, which are applied in signal transmission systems, electrical signal transmission systems, instruments, etc., can solve the problems of bloated body, non-linear output, and unsatisfactory accuracy, and achieve simple implementation of the circuit and output accuracy Reliable, simple and practical results
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[0011] The analog quantity transmission output method in the digital display meter of the present invention, the analog quantity transmission output method in the digital display meter, the steps are:
[0012] 1) Set the range;
[0013] 2) Select an appropriate N-bit digital-to-analog converter according to the set range;
[0014] 3) Real-time sampling of electrical parameters;
[0015] 4) According to the measuring range set in step 1), first calculate the percentage between the value of the electric parameter measured by real-time sampling and the described measuring range, and then compare this percentage with the Nth power of 2 ( 2 N ) are multiplied, rounded, sent to the input terminal of the digital-to-analog converter, and then the analog output from the digital-to-analog converter is transmitted and output. In order to ensure the sampling accuracy of the electrical parameters, the resolution of the N-digit digital-to-analog converter is 1 / 2 N It is less than the ra...
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