The conductive plastic angular displacement sensor is a high-precision displacement sensor with a linear relationship between voltage output and rotation angle. It uses the excellent performance of conductive plastics in electrical performance, process performance and mechanical performance, and replaces the principle of carbon film and metal film resistance, so that the performance of the sensor in terms of accuracy, life, output smoothness and resolution is greatly improved. improve. The conductive plastic angular displacement sensor was mainly used in the military field in the early days. Now, as the technology matures, it has been widely used in various occasions such as position feedback, position detection and displacement measurement in the civil field.
According to industry sources, due to the technical confidentiality of conductive plastic potentiometers, only a few domestic manufacturers are producing. The variety ranges from small to large, round to long, and it surpasses all the performance of other potentiometers (such as: product life, adaptability to harsh environments, product stability). However, it can't exceed the ultra-precision precision wire-wound potentiometer in the linear accuracy of the product, and it has been kept in the range of 0.1% to 1.0%.
Conductive plastic potentiometers have been on the market for many years, and their production technology has made great progress, and their uses have become increasingly widespread. As an angle (straight line) displacement sensor, its excellent characteristics are increasingly exposed. Foreign countries have used it to replace contactless differential transformers (ie RVDT and LVDT) and precision wire wound potentiometers in many fields. In the future, it will develop more and open up new fields of use.
Industry expert Yang Jianfeng believes that from the perspective of the entire gas sensor field, although the technology is stable, the threshold is very low, and the future direction can only be highly sophisticated. China's sensors must achieve breakthroughs in localization, application, and technology in order to have a certain position in the international sensor market and realize the accelerated development of the Internet of Things industry, and sensor intelligence has also become one of the trends in industrial technology upgrades.
In 2009, the Huzhou Science and Technology Project "Development of High-precision Conductive Plastic Displacement Sensors" hosted by Zhejiang Vocational and Technical College passed the acceptance and appraisal of the expert group organized by the Huzhou Science and Technology Bureau. It is reported that through the analysis and research of the production process and structure of the conductive plastic displacement sensor, this project has designed an efficient and highly stable conductive plastic film production process; improved the structure of the brush assembly to make the brush contact with the conductive film The stress remains constant; the connection characteristics of the electrode and the conductive film are improved. At present, the project has applied for national invention patents and utility model patents, and the scientific research results of the project have been put into production in cooperative enterprises.
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