A state detection system and method for an oil-gas spring accumulator based on ultrasonic waves

Abstract

The invention discloses a hydro-pneumatic spring energy accumulator state detecting system and method based on ultrasonic waves. The detecting method comprises the steps that an ultrasonic wave signalof a probe in the detecting system is obtained, wherein the detecting system comprises a hydro-pneumatic spring and an ultrasonic wave detecting device, the hydro-pneumatic spring comprises a power cylinder and an energy accumulator, the ultrasonic wave detecting device comprises a transmitting probe, a receiving probe, a signal transmission circuit and a single chip microcomputer, the transmitting probe and the receiving probe are arranged at the critical positions of the outer surface of a cylinder wall of the energy accumulator, the signal transmission circuit is connected with the singlechip microcomputer, the transmitting probe and the receiving probe; a calibration signal is obtained, wherein the calibration signal is an echo signal produced when the energy accumulator is full of nitrogen gas; whether the ultrasonic echo signal is the calibration signal or not is judged, if yes, it is determined that the state of the energy accumulator is a normal state, and if not, it is determined that the state of the energy accumulator is a to-be-inflated state. By adopting the detecting system or method, the safety of the hydro-pneumatic spring can be ensured, and meanwhile later maintenance cost can be reduced.

Description

technical field [0001] The invention relates to the field of oil-pneumatic springs, in particular to an ultrasonic-based state detection system and method for an oil-pneumatic spring accumulator. Background technique [0002] The oil-gas spring is an elastic element that uses gas as the elastic medium and oil as the force transmission medium. Under the action of the gravity of the vehicle body, the gas medium in the oil and gas spring is in a compressed state. When the vehicle is excited by the uneven road, the piston rod and piston assembly reciprocate relative to the cylinder, and the compressed gas medium acts as the elastic component of the suspension system to ease the incoming vibration and impact. Oil and gas springs generally use high-pressure nitrogen as the elastic medium, and adopt a dynamic sealing method. During long-term use, nitrogen is prone to slow leakage, and after the accumulator leaks, the pressure decreases. Due to the constant static load of the whe...

AI Technical Summary

Problems solved by technology

However, due to the high working pressure of the oil-gas spring, the perforated seal will reduce the reliability of the system and increase the complexity of the system, and once the oil-gas spring itself is damaged, the monitoring system will be scrapped

Therefore, the detection method using the displacement sensor reduces the safety of the oil and gas spring and is easily damaged

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