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

Inactive Publication Date: 2007-07-11
JIANGSU YINHE ELECTRONICS
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

This kind of transmission output is prone to deviation, poor stability, and accuracy cannot meet the requirements; moreover, the range and accuracy of the transmission output are fixed, and the function is too simple to set the range and accuracy according to actual needs. , it is very likely to exceed the range, resulting in non-linear output
In addition, due to the large number of components required, the digital display meter that uses this method to realize the transmission output has a complex structure and a "bloated" body.

Method used

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Embodiment Construction

[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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PUM

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Abstract

The analog range variable output for a digital display meter starts with setting the range, selecting proper N model converter based on set range, timely sampling for electricity parameter, calculating the percentage of the electricity parameter value of the timely sampling and the preset range, getting the integer of the percent multiplied with the N times power of 2 and sending it to the output end of the model converter, and sending out the model converter output analog range. It is simple and practical, with effective ensuring of the linear speed of output.

Description

technical field [0001] The invention relates to an analog quantity transmission and output method, in particular to an analog quantity transmission and output method in a digital display meter. Background technique [0002] At present, most digital display meters need to transmit and output the electric parameters to remote equipment or terminals while displaying them on the digital display meter after collecting the electric parameters. In the existing digital display meters, the usual practice is: directly convert various electrical parameters into small voltage signals, and convert and output through a large number of passive components. This kind of transmission output is prone to deviation, poor stability, and accuracy cannot meet the requirements; moreover, the range and accuracy of the transmission output are fixed, and the function is too simple to set the range and accuracy according to actual needs. , it is very likely to exceed the range, resulting in non-linear ...

Claims

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Application Information

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IPC IPC(8): G08C19/00G08C19/02G08C19/16
Inventor 钱金龙陆向荣
Owner JIANGSU YINHE ELECTRONICS
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