提高液面非接触测量的准确度是当前科学技术的紧迫任务。以坐标(液面)-角度、角度-编码信号的双变换原理工作的光学装置由于结构制作比较简单而广泛应用于这一目的。这种装置的缺点是当液面变化时,射到接收器上的光通量强度要发生变化,因此,这样会引起从光接收器送到记录仪的信号参数发生 Improving the accuracy of non-contact liquid level measurement is an urgent task for science and technology. Optical devices operating on the principle of coordinate (liquid) -angle, angle-coded signal double conversion have been widely used for this purpose due to their relatively simple structure. The disadvantage of such a device is that when the liquid level changes, the intensity of the light flux impinging on the receiver is subject to change, thus causing a signal parameter to be sent from the light receiver to the recorder