基于混沌振子的高精度超声波液位检测

High Accuracy Chaotic Oscillators Ultrasonic Wave Liquid Level Detection

介绍了超声波液位检测原理,分析了容器内透射衰减式定点液位测量,提出了基于混沌振子的微弱信号检测,利用混沌系统对小信号的敏感性及对噪声的免疫力,使淹没在强噪声中的弱信号能够准确检测到,进一步提高了系统在噪声干扰情况下的稳定性。在实验的基础上改善了液位测量的精度,为油田钻井提供了方便。

In this paper,the concept of ultrasonic wave liquid level sensing is introduced and the in-device ultrasonic penetrative attenuation measurement of fixed-point liquid level is analyzed.Then the detection of weak signals based on chaotic oscillator is proposed.This approach improves the system’s stability against noise disturbance because the chaotic system is sensitive to weak signals and is immune to noise signals,therefore can accurately detect the weak signals which are absorbed in the relatively strong noise signals.This technique achieves high accuracy in experiments and can be used in oil field measurement operations.