The high-end equipment manufacturing industry such as construction machinery is an important basic pillar industry in my country, and it occupies an important position in the national economy. Hunan Province is a large and powerful province in the construction machinery industry, and its industrial scale ranks first in the country. The mechanical driving force of high-end equipment is mainly provided by the hydraulic system with large driving force, flexible control and long service life. Pressure-sensitive chips and sensors with high pressure resistance, long service life and high precision are the key elements for realizing precise and intelligent hydraulic control and ensuring safety. Device.