An overview of the pressure sensor's performance indicators and wiring steps

As we all know the working principle of pressure sensor and performance index is what? How to connect to pull pressure sensor? Pressure sensor is also called the resistance strain sensor, belongs to the weighing sensor series. It is a physical signal into electrical signal measurement of the output device. It USES two tension transfer parts to heritability, including force sensor in its structure and tension of the two transmission parts, transmission parts including piezoelectric plate and piezoelectric patches gaskets, which includes base plate of force transmission parts, components and edge characteristics is tension transfer part of its respectively fixed together, force sensing device by the transverse plane of action between the clamping on both ends, piezoelectric sheet pressure on one side of the area in the center of the piezoelectric element, and is located in the other side of the piezoelectric substrate part, side force transfer part of the utility model is one of the purposes of making GouCheng steelyard instead. The actual working environment is very important for the correct selection of pressure sensor. It not only relates to the normal work, safety and service life of tension sensor, and relates to the reliability and security of the entire weighing apparatus. The working principle of pressure sensor: elastomer ( The elastic element, sensitive beam) Elastic deformation under the action of external force, on the surface of resistance strain gages, Conversion element) The resulting deformation. Resistance strain slice deformation, the resistance to change, Increase/decrease) And then through the corresponding measurement circuit or current resistance can be converted to electrical signals ( Voltage) , thus completing the process of external force into electrical signals. Pressure sensor's performance indicators: mainly includes the linear error, hysteresis error, repeatability error and creep temperature characteristics, zero and sensitivity temperature characteristic. Pressure sensor with high precision, wide measurement range, long service life, simple structure, good frequency response characteristics, bad work environment, and the advantages of easy to realize miniaturization, integration and diversification. The downside is the large strain, the weak output signal has a larger nonlinear, but may take a certain amount of compensation measures. So in automatic measurement and control technology has been widely used. Connect pressure sensor, complete the following steps: first, to ensure that the display on the power of the sensor interface is positive, the power supply is negative, with a positive feedback, the feedback is negative, the signal is positive, the signal is negative. If it is 6 wire transducer, the smallest resistance wire is positive, the two groups with a positive feedback; The power is negative, a negative feedback. After receives the display, load sensor. Measure the voltage value, the other two wire ( Millivolts) 。 Positive connection signal, reverse connection signal; If it's a four wire system value, need the power of the sub display the positive and the positive feedback, the power the cathode and negative feedback. Four wire sensor is measured with a multimeter, two root for the power supply, the other two for signal. According to the source of the sensor, can be judged by the color of the wire. Domestic manufacturer usually use red for positive, black for negative power supply, green with a positive signal, white negative signal; Europe and the United States generally adopt green production of sensor for positive, black for negative power, white is positive signal, red negative signals.

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