With the great improvement of China's manufacturing strength, at present, in China's petrochemical industry, domestic Pressure transmitter It has been widely used in petrochemical industry, which has changed the situation that pressure transmitter was mainly imported and controlled by people. But objectively speaking, there is still a certain gap between domestic pressure transmitter and foreign pressure transmitter in product category and performance, but this gap is becoming smaller and smaller now. The formation of this gap has historical objective reasons, more is the subconscious concept in people's minds.
Pressure transmitter is one of the most used measuring devices in automatic control system of petrochemical industry. It not only has a large number, but also contains almost all kinds of pressure transmitters, such as differential pressure, absolute pressure, gauge pressure, high temperature, low temperature and other different applications. No matter in any industry, the stability and reliability of the test is the most basic requirement. In the petrochemical industry, this requirement is more clear and important. At the same time, due to the high precision requirements of the control system, the requirements of high-precision pressure transmitter in the petrochemical industry are also more stringent. The specific technical requirements of pressure transmitter in petrochemical industry are mainly reflected in measurement accuracy, response speed, temperature and static pressure characteristics, and long-term stability.
Due to the development of semiconductor technology, in the pressure sensor industry, silicon technology pressure sensor technology has been very mature. Compared with ceramic piezoresistive pressure sensor, silicon pressure sensor has the advantages of high precision, high sensitivity, good dynamic characteristics, small volume, good long-term stability and low cost. At the same time, the pressure sensor of silicon technology is easy to integrate with the temperature sensor, which increases the temperature compensation accuracy and greatly improves the temperature characteristics and measurement accuracy of the sensor. In China, the pressure sensor is packaged with silicon technology Manufacturer The core technology of silicon pressure sensor is limited by foreign manufacturers, and the silicon piezoresistive sensor manufacturers basically use imported sensors to assemble. During the Eleventh Five-Year Plan period, the state has provided special funds to support some chip research institutions, but it is basically in the experimental stage, and there is no large-scale industrialization. There are many deep-seated reasons, which are inconvenient to elaborate in detail.
On the basis of the traditional strain technology, the new generation pressure sensor is fabricated on a solid substrate by sputtering based on the innovation of manufacturing process. A lot of useful experience has been obtained through long-term research in domestic research institutions. The technology of ion sputtering pressure sensor is mainly used in military field at first. The requirements of pressure transmitter in petrochemical industry are similar in many aspects, especially in environmental adaptation. Therefore, the application of this technology in petrochemical industry is more and more common. Zetian sensor is an earlier manufacturer that developed and produced sputtering pressure sensor by ion sputtering process. The products have many mature and successful applications in petrochemical industry. With the further optimization of manufacturing cost, large-scale production will promote the pressure sensor with this advanced technology to replace other types of pressure sensor in other cost sensitive industries. This article originates from Zetian sensing Please keep the source.