Introduction to the measurement principle and application fields of electronic level

　　With the popularity of electronic level instruments, users often make mistakes in operation and improper protection during work because they do not understand their basic working principles and performance. This greatly reduces the actual working efficiency of electronic level instruments. In order to avoid unnecessary mistakes, this article discusses the basic working principles of electronic level instruments and the problems that arise during daily operation in detail, and conducts specific analysis in combination with specific engineering projects.

　　Among all the methods for measuring elevation, geometric leveling is the most precise method, so it has been used till now. In terms of precision leveling, the locomotive leveling method was created by German geodesists in the early 1960s. In the 1970s and 1980s, the former West Germany developed a locomotive leveling method and measurement system, which consisted of Telamat and active leveling scale. In May 2002, Leica launched a new digital level DNA03 in the Chinese market. This instrument complies with China's national leveling specifications and is fully functional.

　　Overview of Electronic Level Instruments

　　The electronic level is also called a digital level, which consists of a base, a level, a single telescope and a data processing system. The electronic level is based on the automatic leveling instrument, and adds a spectroscope and a detector (CCD) to the telescope optical path. It is a high-tech product that integrates optomechanical and electrical technology, and adopts a stripe coding scale and an image processing electronic system.

　　Digital level is commonly known as electronic level, which integrates electromechanical technology, image processing technology and computer technology. The instrument can automatically collect data and process information, realizing automatic level measurement. Its features:

　　① The reading is objective. There is no problem of misreading or misrecording.

　　② High precision. In the actual observation process, a large number of barcode division images are used to weaken the influence of scale division errors after processing.

　　③ Fast speed. Since the process of reporting, listening and recording, and on-site calculation is omitted, the measurement time is shortened compared with traditional instruments.

　　④ High efficiency, automatic observation can be performed by just aiming, focusing and pressing buttons, which reduces labor intensity.