Temporary frame wire grid type high-temperature strain gauge and manufacturing and using method thereof

Abstract

The invention provides a temporary frame wire grid type high-temperature strain gauge and a manufacturing and using method thereof, and relates to the technical field of high-temperature strain testing. The temporary frame wire grid type high-temperature strain gauge comprises sensitive wire grid, lead wires, a temporary frame and welding spots. Wire materials are convoluted and wound into the shape of the sensitive wire grid through winding equipment; the sensitive wire grid and the lead wires are fused and tightly connected through resistance welding; and the sensitive wire grid and the leadwires are fixed on the temporary frame through nitrocellulose glue to form the temporary frame wire grid type high-temperature strain gauge. The high-temperature strain gauge is fixed on the surfaceof a tested piece through surface cleaning during using, primer or coating and curing, primary capping or coating and curing, integral capping or coating and curing. According to the temporary frame wire grid type high-temperature strain gauge and the manufacturing method thereof, resistance values are adjustable, the resistance dispersibility is less than + / -1 omega, and requirements of high-temperature strain measurement of room temperature at -1000 DEG C for a long time and 1000-1200 DEG C for a short time can be met.

Description

technical field [0001] The invention relates to the technical field of high-temperature strain testing, in particular to a temporary frame wire grid type high-temperature strain gauge and a method for manufacturing and using the same. Background technique [0002] The contact high-temperature strain measurement method based on the principle of strain electrical measurement has high reliability, good adaptability, and simple principle, and has always been the main method of high-temperature strain measurement. As a measurement sensitive element, the high temperature strain gauge plays an important role in converting the measured strain signal into an electrical signal, and is the core element in the measurement system. With the rapid development of aerospace, energy, military and other industries, the service environment of its key components is becoming more and more harsh. Accurate measurement of stress and strain in high temperature environments is crucial for material sel...

AI Technical Summary

Problems solved by technology

The traditional foil-type high-temperature strain gauges with substrates generally can only work in an environment below 350 °C, which is far from meeting the current needs. However, no one has set foot in wire-grid high-temperature strain gauges based on temporary substrates.

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