Numerical control resistance box

Abstract

The invention provides a numerical control resistance box which mainly comprises a data processing module, a motor driven module, a communication interface module, a keyboard module, a display module, a power supply module, a clock module and a storage module, wherein the data processing module determines a set resistance value or a calibration resistance value by acquiring the potential change of each port of the keyboard module; the data processing module determines a set resistance value or a calibration resistance value of an upper computer by acquiring the data information of the communication interface module; the data processing module controls the display module to display the set resistance value; and the data processing module controls the motor driven module to control quantile, unit digit, tens digit, hundreds digit and thousands digit resistance regulation mechanisms so as to realize the regulation of the resistance value. The numerical control resistance box provided by the invention overcomes the defects of complicated processes, large workload and the like of a resistor of a common resistance box, and achieves the effects of accuracy, high efficiency and convenience.

Description

technical field [0001] The invention relates to a resistance box, in particular to a resistance box in which an expected resistance value can be set through a keyboard. Background technique [0002] As a commonly used electronic instrument, resistance boxes can be divided into two types: knob-type manual resistance boxes and digital resistance boxes. Among them, the knob-type manual resistance box can set the resistance by rotating the knob to the corresponding position, which has a large workload and reduces the work efficiency to a certain extent; digital resistance boxes generally realize the proportional relationship between resistance and current through operational amplifiers, and adopt control The circuit current is used to change the resistance value of the branch circuit. This adjustment method is an active adjustment method, which is easy to introduce irrelevant interference and errors. Therefore, the adjustment accuracy is limited and the range is small, which is ...

AI Technical Summary

Problems solved by technology

Among them, the knob-type manual resistance box sets the resistance by rotating the knob to the corresponding position, which has a large workload and reduces work efficiency to a certain extent; digital resistance boxes generally realize the proportional relationship between resistance and current through operational amplifiers, and adopt control The circuit current is used to change the resistance value of the branch circuit. This adjustment method is an active adjustment method, which is easy to introduce irrelevant interference and errors, so the adjustment accuracy is limited and the range is small, which is not suitable for precise resistance setting.

At the same time, since the current resistance box cannot meet the resistance setting and timing modification of the resistance value in batches, it should be limited in some occasions that require comparison experiments of multiple sets of resistance values.

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