Horizontal load force system test structure of rotation arm-type force measurement framework and fabrication method of horizontal load force system test structure

Abstract

The invention provides a horizontal load force system test structure of a rotation arm-type force measurement framework and a fabrication method of the horizontal load force system test structure. Thefabrication method comprises the steps of firstly, defining high-separation load identification point regions on the rotation arm-type force measurement framework, and the pasting a plurality of strain gauges onto each high-separation load identification point region to form multiple groups of full-bridge circuit structures; secondly, performing static calibration on a framework structure pastedwith the strain gauges on a multichannel loading force measurement framework calibration test table, performing decoupling calculation on each full-bridge circuit structure one by one, seeking one group or several groups of bridge structures with highest decoupling accuracy or seeking one group or several groups of bridge structures which can conform to the decoupling accuracy; and finally, completing fabrication of the force measurement framework according to a finally-determined bridge structures. With the structure and the method, provided by the invention, a full-bridge circuit is arrangedat each corner of the force measurement framework, on one hand, the wiring distance is shortened; and on the other hand, the number of the full-bridge circuit is increased, so that the test accuracyis improved.

Description

technical field [0001] The invention relates to a structure for testing the lateral load force system of a swing arm type force measuring frame of a rail vehicle. Background technique [0002] In the prior art, when analyzing the lateral load force system for the rail vehicle bogie frame structure, one method adopts the direct load test method, that is, the bogie axle box spring and the positioning arm are respectively made into independent load cells, and the synchronous Test the load-time history of the axlebox spring and positioning arm under actual operating conditions, and perform combined calculations to obtain the main load of the frame structure. Although this method has high measurement accuracy, there is a dynamic relationship between the measured load and the structural strain. [0003] Another method is to use the positioning arm base test method, that is, stick strain gauges at the root of the positioning arm base of the frame to form a lateral load full-bridge...

AI Technical Summary

Problems solved by technology

Although this method solves the problem of the dynamic relationship between the measured load and structural strain, the sticking position of the strain gauge is limited by the bogie type, and the system test accuracy is low

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