Detailed explanation of working principle and characteristic parameters of hydraulic pressure sensor

Hydraulic pressure sensor is a commonly used testing instrument, and its products are widely used in production automation, aerospace, military, petrochemical, oil well, electric power, ships, machine tools, pipeline air supply and other fields. Today we mainly introduce the working principle and characteristic parameters of the hydraulic pressure sensor, hoping to help you. The working principle of the hydraulic pressure sensor The working principle of the hydraulic pressure sensor is that the pressure directly acts on the diaphragm of the sensor, causing the diaphragm to produce a micro displacement proportional to the pressure of the medium, changing the resistance of the sensor, and detecting this change with an electronic circuit , And convert and output a standard signal corresponding to this pressure.　　Hydraulic pressure sensor characteristic parameter　　 1. Sensor: a device or device that can sense the specified being measured and convert it into a usable output signal according to a certain rule. Usually composed of sensitive components and conversion components.　　①Sensitive element refers to the part of the sensor that can be measured directly (or in response).　　②The conversion element refers to the more sensitive response in the sensor and converts the measured into an electrical signal part that is transmitted and/or measured.　　③When the output is a specified standard signal, it is called a transmitter.　　2. Measuring range: the range of the measured value within the allowable error limit.　　 3. Range: The algebraic difference between the upper limit and the lower limit of the measurement range.　　 4. Accuracy: the degree of agreement between the measured measurement result and the true value. 5. Repeatability: Under all the following conditions, the degree of agreement between the results of multiple consecutive measurements of the same measured quantity: 　　 6. Resolution: the smallest possible measurement that the sensor can detect in the specified measurement range The amount of change.　　7. Threshold: the smallest change that can be measured that can make the sensor output produce a measurable change.　　 8. Zero position: the state that minimizes the absolute value of the output, such as the balanced state.　　9. Excitation: The external energy (voltage or current) applied to make the sensor work normally.　　10. Maximum excitation: The maximum excitation voltage or current that can be applied to the sensor under indoor conditions.

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