激光动态液位测量技术研究

如今,运载火箭大量使用液氧、煤油等液体推进剂,其液位测量技术主要有浮子式、激光式、电容式、雷达式等。介绍并实现了一种激光液位测量系统,该系统体积小、功耗低,可适应多种测量环境,能满足航天燃料液位测量高精度、高动态、连续稳定测量的要求。系统利用相位式激光测距技术,通过测量激光回波信号的相位延迟,计算激光光程从而得到距离数据并通过客户端进行直观展示和数据存储。系统最大测量距离可达100 m,精度为±1 mm。该系统为非接触测量,耐腐蚀,通过加入反射板可实现透明、非透明液体测量。

Research on Laser Liquid Level Measurement Technology and Its System Integration

Nowadays, launch vehicles generally use liquid propellants, such as liquid oxygen and kerosene. Liquid level measurement technology mainly includes float type laser type, capacitive type, radar type, etc. This paper introduces the basic principles of several liquid level measurement techniques and implements a phased laser level measurement system. The system is small in size and low in power consumption, and can adapt to a variety of measurement environments, which can meet the requirements of high-precision, high-dynamic, continuous and stable measurement of aerospace fuel level measurement. The system uses phase laser ranging technology to calculate the laser path length through the phase delay of the laser echo signal to obtain the distance data and the data is displayed and stored by the client terminal. The system has a maximum measuring distance of 100 m with the accuracy of ±1 mm. The system uses non-contact measurement, which is corrosion resistant. In addition, transparent, non-transparent liquid measurement can be achieved by adding a reflector.