Numerical control resistance box

A resistance box and resistance value technology, applied in the direction of measuring electrical variables, measuring devices, instruments, etc., can solve the problems of limited adjustment accuracy, small range, error, etc., and achieve the effect of improving measurement accuracy

Inactive Publication Date: 2012-10-24
三亚哈尔滨工程大学南海创新发展基地
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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

Method used

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Embodiment Construction

[0023] Below in conjunction with accompanying drawing, the present invention is further described as follows:

[0024] combine figure 1 , The main components of the device of the present invention include: A cabinet, B keyboard, C liquid crystal display, D, E resistance access copper column, F data communication port, G power port. Among them, the actual value range of B is 0000.0-9999.9, so the range of the resistance box is 0-9999.9 ohms; C keyboard keys include: number keys '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', power switch button 'X', resistance setting button 'Y', resistance calibration button 'Z'; resistance between copper pillars D and E The value is the set resistance value of the resistance box; the data communication port F is connected to the host computer through the data line to realize data communication with the host machine, and the communication form adopts the serial port 232 communication protocol; the input working voltage of the power port G i...

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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 ...

Claims

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Application Information

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IPC IPC(8): G01R35/00
Inventor 邢博闻陈潇刘胜李冰
Owner 三亚哈尔滨工程大学南海创新发展基地
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