The use of the displacement sensor

Industrial markets have a bearing inner ring roundness can be intelligent detection system. The system adopts the photoelectric encoder Angle such as sampling, digital display, and are connected to the PC, to overcome the traditional roundness testing system cannot anti-reverse, and reading difficult, easy to appear error and false waste, do not have the function of data processing, the system of Shanghai Yu Yang production displacement sensor and there was a very important role.

Rolling bearing is a kind of highly compatibility standard parts, it has a small friction lubrication, easy start, the advantages of simple and convenient to replace, is passed in a variety of mechanical motion and load bearing of the important supporting parts, almost indispensable parts in the mechanical structure. With the development of the industry, the performance of the bearing, life and reliability higher requirements are put forward. The performance, life and reliability of the rolling bearing, depends on its design, manufacture and testing process. The detection is to improve the bearing performance is an important link. Bearing inner ring is in close contact with shaft parts, it not only has the size error, and there exists a roundness error, roughness and waviness errors, etc. Bearing inner ring of the roundness measurement by displacement sensor, photoelectric encoder Angle such as sampling control system, control and data processing unit using 8-bit microcontroller. Via a serial port data to the PC, easy to focus on analysis of the data. External LED, can display the results of data processing, easy reading, so as to realize the intelligent of the rolling bearing roundness detection, digital.

The system mainly consists of three parts: detection part, signal acquisition and processing, input and output part. Detection part includes displacement sensor, photoelectric encoder, amplifying, filtering, signal acquisition and processing parts of the system are responsible for the AD conversion, control and sampling data storage. Input and output part consists of leds and a keyboard. First select appropriate displacement sensor, according to the roundness instrument standard JB/T 10028, 1999, A level of instrument error, linear error is not more than 2% of full scale measurement system, measurement system valve is not greater than 0.02 microns. Contact measurement method should be adopted, so choose good stability, simple structure and reliable, strong anti-interference advantages of differential transformer type inductance sensor as a displacement sensor. Shanghai Yu Yang production of YY - WY100 displacement sensor change as the preferred sensor system.

High precision displacement sensor has good electromagnetic compatibility, technical indicators are superior to national standards, at the absolute leading position in China. Shanghai Yu Yang engineering and technical personnel in the research and development of long-term production based on the spirit of independent innovation, the courage to explore, tireless efforts, have made "differential transformer displacement sensor" key technology breakthrough, stability, thus effectively extends the using range and field of the product. Comprehensive technical indicators to catch up and more than similar foreign products, the rare displacement sensor is to replace imported products. Second, a differential transformer displacement sensor measurement circuit, differential transformer type sensor output voltage, if use ac voltmeter measurement, can only reflect the size of the armature to pull to move, and can't reflect the direction of movement, at the same time, it will contain zero residual voltage measurements. So in actual measurement, it usually USES the phase-sensitive detection circuit and differential rectifier circuit. Phase-sensitive detection circuit, it is necessary to use primary excitation voltage as a reference to determine the polarity of the output voltage phase, which requires persistence tentering value and frequency of the excitation signal source, the need to compensate the phase shift of differential transformer primary and secondary, frequency and temperature fluctuations caused by the error. And don't have to consider the phase differential rectifier circuit problem, circuit is relatively simple.