Static pressure testing device for unmanned plane oil gas damper

Abstract

The invention discloses a static pressure testing device for an unmanned plane oil gas damper, and the device is composed of mounting seats, a screw driving platform, a servo motor, a tension and pressure sensor, a displacement sensor and a control computer. A shock absorber is installed between the two mounting seats through a connecting member. The control computer judges the working state of the shock absorber according to a value of the tension and pressure sensor, sends a stroke compression command and controls the servo motor to compress the shock absorber on the screw driving platform.The pressure sensor measures and feeds back a compression force transmitted by the shock absorber. After the control computer collects and judges and adjusts the compression force, the static pressureof the shock absorber can be tested quickly and efficiently, so as to avoid the repeated recycling and landing of the unmanned plane. The reduction of the static pressure of the shock absorber causesa condition that the compression stroke of the shock absorber exceeds an allowed range. The testing device is simple in structure, is convenient for maintenance, facilitates the operation in the field, is high in test precision, is easy to read test results, is strong in environmental applicability, and is low in cost of use.

Description

technical field [0001] The invention relates to the technical field of static pressure testing, in particular to a static pressure testing device for an oil-gas shock absorber of an unmanned aerial vehicle. Background technique [0002] The recovery methods of drones are mainly divided into two types: taxi landing and parachute landing. Rolling and landing has high requirements on the site. For small and medium-sized UAVs, in order to recover them easily and conveniently, parachute recovery is often used, and the energy during landing is absorbed through the shock absorber. The interior of the shock absorber is filled with aviation hydraulic oil and compressed nitrogen, and the energy is absorbed by the damping force of the liquid oil flowing through the restrictor hole and the spring force of air compression. The static pressure in the air cavity is proportional to the force of the air spring, which is an important parameter to determine the cushioning performance of the U...

AI Technical Summary

Problems solved by technology

This method requires a high level of user experience, lacks quantitative standards, and is prone to human misjudgment, posing a major safety hazard; at the same time, due to the lack of test data, it is not conducive to guiding follow-up maintenance work

However, the test methods adopted by manufacturers rely on large-scale professional test benches and high-precision test instruments, which are not conducive to delivery to users in terms of cost and convenience.

In this technical field, there is no literature on the static pressure test device and method for the oil-gas shock absorber of parachuting UAV.

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