Pre-tensioning structure and assembly method of sensor

The invention discloses a pre-tensioning structure and an assembly method of sensor, and relates to the field of sensor manufacture and use. The pre-tensioning structure of the sensor includes an upper mass block, a lower mass block, a cover plate and a screw rod, wherein the screw rod in turn passes through the upper mass block, the sensor and the lower mass block, and the upper mass block, the lower mass block and the sensor are kept coaxially. The upper and lower ends of the screw rod are respectively fixedly connected with the upper mass block and the lower mass block. The two ends of thesensor are respectively contact with the lower end of the upper mass block and the upper end of the lower mass block. The assembly method of the sensor includes the following steps: stacking the lowermass block, the sensor and the upper mass block in sequence; passing the screw rod through the upper mass block, the sensor and the lower mass block from top to bottom; and fixedly connecting the screw rod with the upper mass