Multifunctional special-shaped electric bridge

Abstract

The invention relates to a multifunctional special-shaped electric bridge, belonging to the field of measurement technology, autocontrol technology and electronic equipment. A monopolar electric bridge and a bipolar electric bridge have four structural types of pair type, composite type, chain type and tree type respectively. The monopolar electric bridge comprises a resistor, a voltage-controlledcurrent source, a multiplier or a follower and the like. The bipolar electric bridge comprises a resistor, an operational amplifier, a multiplier or a follower and the like. When the electric bridgeis balanced, each bridge arm or bridge limb has the same resistance ratio. The voltage, the current and the power of a pressure flow bridge arm, a balanced bridge limb and a source-controlled bridge limb are extremely simple and convenient to be measured; a proportional controller leads the incitation of the bridge arms and the bridge limbs to be controlled independently; each bridge arm and eachbridge limb can obtain different controllable power; and the composite-type electric bridge, the chain-type electric bridge and the tree-type electric bridge can realize the relational operation of resistance values among a plurality of bridge arms and bridge limbs. The multifunctional special-shaped electric bridge is characterized by simple structure, abundant functions, wide applicable scope, convenient usage and the like, and has extremely high practical values.

Description

technical field [0001] The invention relates to a multifunctional special-shaped electric bridge, which belongs to the field of measurement technology, automatic control technology and electronic equipment, especially the field of electric bridge technology. Background technique [0002] The commonly used Wheatstone bridge is a simple unipolar pair passive bridge (such as figure 1 As shown), the Wheatstone bridge is a technology with a long history and is widely used, especially in the field of measuring instruments and equipment. [0003] The Wheatstone bridge is composed of two bridge arms, and each bridge arm is composed of two resistors connected in series. The bridge arm is connected between the excitation terminal and the ground terminal, and the excitation terminal is connected to the reference power supply. The midpoint of the bridge arm is The common end of the two series resistors is the signal end of the bridge arm. [0004] The principle of the Wheatstone bridg...

AI Technical Summary

Problems solved by technology

[0006] With the development of technology, electronic instruments and equipment present diversified requirements for electric bridges, requiring electric bridges to have multiple functions, such as: independent excitation of two bridge arms, simple and convenient measurement methods for voltage, current and power, and two bridges Different excitation power control for different arms, correlation calculation of resistance values ​​between multiple bridge arms, etc., but the Wheatstone bridge is difficult to meet the requirements, or the relevant measurement and adjustment circuits become very complicated in application

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