A resistance adjusting machine for foil strain gauge

Abstract

The present application discloses a resistance adjusting machine for a foil strain gauge, which includes a grinding and swinging assembly, and the grinding and swinging assembly includes a grinding bracket, a first driving mechanism, a first cantilever, a second cantilever, a first grinding part and a second cantilever Two grinding parts, the first grinding part comprises a first grinding rod, the second grinding part comprises a second grinding rod, the first grinding part is arranged on the first cantilever, and the second grinding part is arranged On the second cantilever, the first cantilever and the second cantilever are respectively arranged on the grinding support, and the first driving mechanism is used to respectively drive the first cantilever and the second cantilever moving in the grinding direction to drive the first grinding rod and the second grinding rod to move in the grinding direction. In this application, since the upper and lower resistors are ground at the same time to adjust the resistance value, the angle and strength of the grinding head are the same every time the equipment lowers the grinding head, so the resistance values ​​of the upper and lower resistors can be guaranteed to be very close.

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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