Helicopter blade surface strain gauge pasting and wire arrangement method

Abstract

The invention belongs to the technical field of helicopter test, and particularly relates to a helicopter blade surface strain gauge pasting and wire arrangement method. Special normal-temperature quick-drying glue is used for pasting a strain gauge and a test wire, a finger-pressing short-time fixing method and a room-temperature normal-temperature curing method are adopted, and long-time curingis achieved without tool pressurization. Single-color (red, blue, yellow and green) single-core multi-strand silver-plated insulating flame-retardant superfine special military cables are used as bridging test wires, the red and blue cables are respectively used as positive and negative bridge voltage of a strain bridge circuit, and the yellow and green cables are respectively used as positive andnegative signal output of the strain bridge circuit; a strain bridge circuit test group bridge wire is adopted, and after the wire is arranged from the rear edge of a blade to the lower wing surfaceof the blade, the wire is arranged to a blade root connecting point along the chord line position of the lower wing surface of the blade; and two-component blend rubber which is water-resistant, oil-resistant, insolation-resistant and the like and of which various performance indexes accord with complex environments such as blade vibration, fatigue and the like is used as a protective layer.

Description

technical field [0001] The invention belongs to the technical field of helicopter testing, in particular to a method for pasting strain gauges on the surface of helicopter blades and wiring wires. Background technique [0002] The flight test of the new research helicopter needs to carry out the life-defining test flight of the key components of the whole machine according to the regulations, including the waving of the key components of the main and tail rotor blades, the shimmy bending moment load test, and the key parts of the key structural parts are measured under the actual flight subjects. To obtain a large amount of measured data of flight loads, to assess the structural strength, as well as to monitor the structural fatigue life and compile the load spectrum. [0003] For flight test load tests, resistance strain gauges are generally used to measure structural strain loads. Compared with other aircraft tests, the strain gauge bonding bridge and test wire wiring tech...

AI Technical Summary

Problems solved by technology

[0004] When Eurocopter and other foreign countries carry out the patch wiring of helicopter blades, the adhesive glue for strain gauges generally needs to be pressurized and cured for 48 hours. The test cable is made of flat film cables and copper wires. Reconcile glue, and need to use tooling fixtures to pressurize and cure for 48 hours. Cutting\polishing\cleaning\pasting\fixing\welding\connection of flat cables, etc., the patch curing time is long, the weight of the cable is heavy, and the signal transmission of the copper wire is weak, etc. Inadequacies

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