Pressure sensors are used in many environments, and some environments may be harsh. For example, pressure sensors need to be used to measure impact pressure. Measuring impact pressure generally requires high performance of pressure sensors. We usually have the following methods to measure impact pressure. The first method is to measure with a common ceramic pressure sensor or a diffused silicon pressure sensor, but instead of directly measuring, a buffer tube is added in front to measure the impact pressure. This method is economical and easy to install, so the application is also very extensive. The second method is to change the pressure transmitter chip, instead of the ordinary ceramic core or the diffusion silicon core, and the strain gauge, the strain gauge is a kind of conversion of the strain change on the device under test into an electrical signal. Sensitive device. It is one of the main components of a piezoresistive strain sensor. Pressure sensor resistance strain gauges are most commonly used in metal strain gauges and semiconductor strain gauges. The metal resistance strain gauge has two kinds of filament strain gauges and metal foil strain gauges. Usually, the strain gauge is tightly bonded to the mechanical strain matrix by a special adhesive. When the stress changes due to the force of the substrate, the strain gauges are also deformed together, so that the resistance of the strain gauge is changed, thereby The voltage applied to the resistor changes. The strain gauges typically have a small change in resistance when subjected to force. Typically, such strain gauges form a strain bridge and are amplified by a subsequent instrumentation amplifier and transmitted to the processing circuit. Strain gauge pressure sensors are generally shock resistant and resistant to impact, but the accuracy of such sensors is open to question. No matter what method is used to measure the impact pressure, it is to protect the sensor core from being damaged by strong pressure. Which method is used depends on the current environment and the customer's choice.