Use the line of sight of the optical measuring instrument to establish a fixed vertical plane parallel to or passing through the dam axis as the reference surface, and regularly observe the deviation value between the determined point and the reference surface, that is, the horizontal displacement of the point. This method is suitable for the observation of the lateral horizontal displacement of the top of concrete buildings and the lateral horizontal displacement of earth-rock buildings. The line-of-sight method requires that the displacement punctuation (measurement point), work base point and check base point be arranged on and near the hydraulic structure...

Turn off the power when plugging or unplugging the grating sensor and the digital meter plug socket. Add a protective cover as much as possible, and clean up the chips and oil splashed on the ruler in time, strictly prevent any foreign matter from entering the inside of the grating ruler sensor housing, and regularly check whether the mounting connection screws are loose...

Taking transmission grating as an example, when a small angle θ is formed between the line pattern on the indicator grating and the line pattern on the scale grating, and the two grating scale facets are placed relatively parallel, under the illumination of the light source, they are located almost perpendicularly. On the grid pattern, light and dark stripes are formed. This kind of fringe is called "moiré fringe". Strictly speaking, the direction of the moiré fringe arrangement is perpendicular to the bisector of the angle between the two grating lines...

A measuring element that converts the measured displacement into an analog signal output. It is usually composed of transforming elements, guide members and measuring force springs, and sometimes the sensor also includes a part of the measuring circuit. Analog displacement sensors can be divided into resistive, capacitive, inductive, eddy current, photoelectric, and Hall type according to the working principle of the transforming element. The picture is a schematic diagram of the structure of an inductive displacement sensor. The conversion element is mainly a differential inductance coil composed of a coil and a magnetic core......

The grating ruler measurement technology is a digital sensor technology integrating optics and electromechanics. It uses photoelectric conversion technology to convert mechanical position information into digital signal output and display. It has the advantages of high measurement accuracy, fast speed, good stability, and strong anti-interference ability. , Often used in the measurement of machining accuracy of machine tools. The installation of the digital display meter: The digital display meter should be installed in a position where the processing personnel can easily see the measurement data and do not occupy the function of the machine tool to avoid contact with oil, water, and heat sources...

This article mainly introduces the common failures of digital display meters and their handling methods, and provides users with relevant references. When there are problems with digital display meters, do not blindly disassemble and repair them. You should make further details on the specific failures of digital display meters according to the problems that occur. Judge, then test and repair. When the digital display meter displays abnormally, use a high-precision process calibrator to change from the zero point of the digital display meter to the full scale. If the digital panel of the digital display meter changes from zero to tens of volts......