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(1) Strong ability to adapt to harsh environments - sensors generally work in a wide range of environments, from extremely cold to hot areas, many in the open air Working in an environment, it should be resistant to flying sand and stones, dust, moisture, high resistance to salt corrosion and acid corrosion, the ability to resist interference from polluting gases, and the ability to adapt to high temperatures, extreme cold, strong vibration, impact and in The ability to work normally under other conditions should also have strong noise immunity and a high signal-to-noise ratio.
(2) Moderate price, suitable for mass production - requires good sensor consistency, suitable for automated mass production, and has higher requirements for processing equipment to eliminate inconsistencies and errors caused by manual operations .
(3) High stability and reliability - the sensor is a high-precision detection instrument, which has strict requirements for applications in military, aviation, and aerospace, and products must undergo strict testing before they can be used. Therefore, sensor production is a specific application and embodiment of high and new technology. Whether a sensor has high technical added value is reflected in whether the technical content and processing technology it contains are high-tech. Some sensors require metal packaging due to the conditions of their application environment. They are generally welded and sealed, such as pressure sensors, force sensors, Hall sensors, photoelectric sensors, temperature sensors, etc. These sensors have sensitive components inside. and integrated circuits, which are filled with inert gas or evacuated and isolated from the outside world. They have pressure resistance and air tightness requirements. There are also welding strength requirements and air leakage rate requirements. The welding quality requirements are high, and the deformation during the welding process is small. It cannot be Internal components and microcircuits are damaged. At present, sensor sealing welding includes resistance welding, tungsten arc welding, plasma arc welding, electron beam welding and laser welding.