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stepper motor oil pressure gauge
stepper motor oil pressure gauge：The oil pressure gauge driven by the stepping motor includes a power converter electrically connected with the microcontroller and a rail to rail signal processor electrically connected between the pressure sensor and the microcontroller. The rail to rail signal processor transfers the level of the voltage signal sent by the pressure sensor, amplifies it and outputs it to the microcontroller; A reference voltage source electrically connected between the rail to rail signal processor and the power converter, which provides the rail to rail signal processor with a level shifted transfer voltage; And a motor driver electrically connected with the output end of the microcontroller; And a v/i linear converter is electrically connected with the SPI output interface of the microcontroller; The utility model uses a single power supply to supply power to the circuit and increases the amplitude of the sampling signal input to the microcontroller. The circuit can ensure the linearity of the sampling signal. At the same time, the utility model has the advantages of simple circuit structure, low cost, good repeatability, high linearity and high reliability
This method requires repeated debugging to meet the corresponding accuracy requirements. The debugging process is very troublesome, and the debugging accuracy and repeatability are poor; Moreover, the debugging time is generally more than 30 minutes / set. With the passage of time, the parameters change, which is easy to produce zero point and full-scale drift, its linearity changes, and the debugging repetition is poor. The content of the utility model is to solve the above technical problems. The utility model provides an oil pressure gauge driven by a stepping motor. It uses a single power supply to supply power to the circuit, and can increase the amplitude of the sampling signal input to the microcontroller. The circuit can ensure the linearity of the sampling signal. At the same time, the utility model has the advantages of simple circuit structure, low cost and repetition
It has the advantages of good performance, high linearity, high reliability and long-distance signal transmission. The purpose of the utility model is to realize an oil pressure gauge driven by a stepping motor, which comprises a microcontroller and a pressure sensor. The pressure sensor is used to sense the pressure change of the oil and convert the change into an electrical signal, and also comprises a power converter electrically connected with the microcontroller. The power converter converts the output voltage of the automobile battery into the standard working voltage output of the microcontroller; And a rail to rail signal processor electrically connected between the pressure sensor and the microcontroller. The rail to rail signal processor transfers the voltage signal sent by the pressure sensor, amplifies it and outputs it to the microcontroller
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