Method and device for calibrating zero position output value of sensitive shaft of tilt angle sensor

Abstract

The invention discloses a method for calibrating a zero position output value of a sensitive shaft of a tilt angle sensor. The tilt angle sensor is a tilt angle sensor of a capacitive type acceleration transducer. The method comprises the following steps: fixing a tilt angle sensor circuit board and applying a first action force on a movable polar plate of a sensor capacitor in the direction of the sensitive shaft; acquiring a first calibration factor value output by the capacitive type acceleration transducer; in the direction of the sensitive shaft, applying a second action force on the movable polar plate and ensuring that the second action force and the first action force have same strength and opposite directions by taking the capacitive type acceleration transducer as the reference;acquiring a second calibration factor value; and acquiring a zero position output value of the sensitive shaft, wherein the zero position output value is equal to 1 / 2 of the sum of the first calibration factor value and the second calibration factor value. The method can accurately calibrate the zero position output value of the sensitive shaft of the tilt angle sensor, avoid the defect that the zero position output value is manually calibrated and ensure that the tilt angle sensor can more accurately measure the tilt angle.

Description

technical field [0001] The invention relates to a method and device for calibrating the zero output value of the sensitive axis of an inclination sensor, in particular to a method for calibrating the zero output value of the sensitive axis of an inclination sensor of a capacitive acceleration sensor, and also relates to calibrating the sensitive axis of an inclination sensor A device that zeros the output value. Background technique [0002] In the field of construction machinery, road machinery, port machinery, lifting machinery and other construction machinery, in order to achieve the purpose of mechanical state monitoring and attitude control, the inclination sensor is required to accurately measure the inclination angle of a certain component relative to the reference plane. [0003] The traditional tilt sensor is a pendulum sensor, including solid pendulum, liquid pendulum and gas tilt sensor. The volume and weight of the solid tilt sensor are relatively large; the peri...

AI Technical Summary

Problems solved by technology

The current calibration method has two shortcomings: First, there must be a certain error in manually finding the zero position of the sensitive axis, and the zeroset obtained at this time also has a large error; second, in manual operation, there will be a dynamic acceleration. Dynamic acceleration will also affect the accuracy of getting zeroset

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