Resistance adjusting machine for foil strain gauge

Abstract

The invention discloses a resistance adjusting machine for a foil strain gauge. The resistance adjusting machine for the foil strain gauge comprises a polishing swing assembly which comprises a polishing support, a first driving mechanism, a first cantilever, a second cantilever, a first polishing portion and a second polishing portion, the first polishing portion comprises a first polishing bar, the second polishing portion comprises a second polishing bar, the first polishing portion is arranged on the first cantilever, the second polishing portion is arranged on the second cantilever, the first cantilever and the second cantilever are arranged on the polishing support respectively, and the first driving mechanism is used for driving the first cantilever and the second cantilever to move in the polishing direction so as to drive the first polishing bar and the second polishing bar to move in the polishing direction. According to the resistance adjusting machine for the foil strain gauge, the resistance value of an upper resistor and the resistance value of a lower resistor are adjusted through grinding at the same time, the grinding head of equipment works at the same angle and with the same force all the time, and therefore it can be guaranteed that the resistance value of the upper resistor is very close to the resistance value of the lower resistor.

Description

technical field [0001] The application relates to the field of strain gauge production, in particular to a resistance adjusting machine for foil strain gauges. Background technique [0002] A resistance strain gauge is a sensitive element that applies the "resistance-strain" effect. Resistance strain gauges usually use Wheatstone bridge for signal amplification and output in practical applications. Wheatstone bridge has "1 / 4 bridge connection method", "half bridge connection method" and "full bridge connection method". These three connection methods It is required that each resistance strain gauge connected to the bridge has relatively consistent resistance value parameters, especially in the full bridge connection method, the closer the resistance values ​​of the resistance strain gauges, the better. [0003] The main materials of foil strain gauges are constantan and kama. Foil strain gauges are manufactured through substrate preparation, exposure, corrosion and other pr...

AI Technical Summary

Problems solved by technology

[0004] At present, the traditional resistance adjustment process of foil resistors mainly uses manual mechanical grinding. The operator holds the grinding motor to grind and adjust the resistance. On average, 7-8 pieces of resistance need to be replaced with cotton for grinding, and each time only It can grind half of the side (one of the two resistors in each group). The angle and strength of the lower grinding can not be consistent during manual grinding, and only half of the side can be ground each time when manual grinding, so the resistance values ​​​​of the upper and lower resistors sometimes differ greatly. Far, it cannot guarantee that the resistance values ​​of the upper and lower resistors are close. At the same time, the manual mechanical grinding method requires a lot of manpower and low efficiency.

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