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Method for controlling and compensating programmable standard resistance generator

A standard resistance and generator technology, applied in the field of resistance error compensation, can solve the problems of reduced resistance accuracy and unattainable error.

Inactive Publication Date: 2005-07-20
CHENGDU KAITIAN ELECTRONICS
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  • Abstract
  • Description
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Problems solved by technology

[0003] Chinese patent publication No. 89108214.X, titled "Programmable Resistor Signal Source" patent, according to the law of voltage division, a double set of resistance generator designed under the premise of constant voltage source and resistance, only through the analog / digital conversion link It will produce an error of at least about 0.08% FS, plus the error generated by the power supply and the accumulated error of each resistance link, which will greatly reduce the resistance accuracy of its output
Even in the resistance output range of 0~1000Ω, its error is far from meeting the requirement of ≤0.4Ω

Method used

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  • Method for controlling and compensating programmable standard resistance generator
  • Method for controlling and compensating programmable standard resistance generator
  • Method for controlling and compensating programmable standard resistance generator

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Embodiment Construction

[0042] figure 1 A schematic circuit block diagram of a programmable standard resistance generator controlled and compensated for errors by the present invention is described. The generator is an intelligent (programmable) device that can generate purely resistive signals. It adopts computer processing of high-precision reference resistors Ri (i=1-16) arranged according to binary rules to obtain dynamic or static high-precision pure resistance signal source output. It can be an independent programmable standard resistance generator, or it can be made into a "programmable standard resistance generator" expansion board that can be inserted into the bus expansion slot of a PC computer for users to use, or it can be made into a combination of its principles A special part of a device or instrument designed into the designer's part. The PC computer of the present invention can be an industrial control computer, a commercial computer, any computer containing more than 8 data buses...

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Abstract

The invention discloses a method to control and compensate error of programmable standard resistance generator. It comprises 16 exactitude resistances at most and connected with each other to form resistance network in series according to binary principle; eliminating the error brought from the winding process of the exactitude resistances; and deciding the resistance value. And the contacting resistance error of programmable standard resistance generator relay contacts must make hardware to compensate. The invention would make the standard resistance output the absolute error less than 0.2ohm in the range between 0 and 6553.6ohm.

Description

technical field [0001] The invention relates to a resistance error compensation method for independently outputting pure resistance or for simulating a temperature sensor, outputting a resistance signal source or for debugging and calibrating an electronic potentiometer. Background technique [0002] In the known technology, the pure resistance controlled by computer can continuously output pure resistance or be used for analog temperature sensor resistance signal source output or as electronic potentiometer debugging and calibration resistance. Only when the output is very small resistance can it reach ±0.4Ω. error. And the higher the output resistance, the greater the error. For example, the American VALHALLA SIENTIFC.INC company adopts the constant current source principle to output the 2724A programmable resistance generator of the resistance signal, the precision of the resistance output is ±0.25Ω~±0.4Ω, and it will produce an error of about 0.1% at full scale . When...

Claims

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Application Information

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IPC IPC(8): H01C1/16H01C10/00H01C13/00
Inventor 何光栋
Owner CHENGDU KAITIAN ELECTRONICS
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