Composite pressure sensor and pressure switch

Due to the need of engineering practice, the pressure switch is not only confined to the onoff the two state control of the pressure at a point, but on the basis of the switch control to also can achieve resolution pressure size, the control point set in a row. Based on this problem, need to consider how to manage the combination pressure switch and pressure sensor, and can satisfy the requirement of miniaturization and function integration.

the development of the pressure switch sensor is the single function of mechanical pressure switch and pressure sensor structure miniaturization, integration, make both in the same pressure chamber can provide the switch signals and continuous electrical signal at the same time. In the process of development, need to break through the integration of structure, design of small sensors and mechanical pressure switch key technical difficulties, such as solution involved the composite technology of multi-discipline cross each other.

in order to achieve the integration of mechanical pressure switch and sensor structure, both must be in the same pressure in the cavity. If there are no restrictions on the size and weight of the volume, pressure sensor and pressure switch must be can a parallel arrangement. But in a smaller space structure, you need to install the sensor and face to face pressure diaphragm of the pressure switch in the same pressure cavity, sharing the same pressure interface and signal connector. Synchronizes the feelings of external pressure, and at the same time to provide the more signals and continuous electrical signal. Pressure switch sensor shell is made of stainless steel materials, the overall design with solid hard connection, using the argon arc welding, resistance welding, electron beam and so on a variety of body connection method to realize no moving parts within the sensor structure, strengthen the compressive strength, resistance to vibration and shock sensor.