A method for adjusting linearity of wire-wound potentiometer

Abstract

The invention belongs to the field of potentiometer design, and specifically relates to a method for debugging the linearity of a wire-wound potentiometer. It is impossible to achieve absolute uniformity for the pitch of turns of a resistance wire when being wound, the resistance distribution of the resistance wire is not absolutely uniform, and the resistance distribution is affected by the framework shape of the wire-wound potentiometer, so that a certain error exists in resistance distribution per unit length of the wire-wound potentiometer, and a precision requirement cannot be reached inmost cases by only moving the wire-wound potentiometer in the debugging process. The invention provides a method for debugging the wire-wound potentiometer, which is characterized in that a debuggingcircuit is adopted, a matching resistor R3 is connected in series at a positive end of a wire-wound potentiometer R1, and a potentiometer R2 is connected with the wire-wound potentiometer R1 and the matching resistor R3 in parallel, so that fine adjustment for output voltage of a brush is achieved, the output voltage is enabled to be within a required theoretical voltage range, and the total impedance is enabled to meet requirements.

Description

technical field [0001] The invention belongs to the field of potentiometer design, in particular to a method for debugging the linearity of a wire-wound potentiometer. Background technique [0002] The wire-wound potentiometer is a signal conversion element that can convert the linear displacement or angular displacement signal of the brush into an electrical signal. During the working process of the potentiometer, the mechanical linear displacement or angular displacement signal drives the brush to slide on the working surface of the potentiometer, so that the brush outputs an electrical signal proportional to the linear displacement or angular displacement signal. [0003] The wire-wound potentiometer is uniformly wound on the frame by a precision resistance alloy wire at a certain turn pitch, so theoretically the resistance distribution per unit length of the wire-wound potentiometer is uniform. During the debugging process, when the position of the brush is relatively f...

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Problems solved by technology

However, since the turn pitch of the resistance wire cannot be absolutely uniform during winding, the resistance distribution of the resistance wire itself is not absolutely uniform, and is affected by the shape of the wire-wound potentiometer skeleton, so the final wire-wound potentiometer unit length There is a certain error in the resistance distribution, and the accuracy requirements cannot be met by only moving the wire-wound potentiometer during the debugging process.

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