Method and device for calibrating zero position output value of sensitive shaft of tilt angle sensor
A technology of inclination sensor and sensitive axis, applied in the direction of instruments, measuring inclination, surveying and navigation, etc., can solve the problems such as affecting the accuracy of zeroset and manually searching for sensitive axis errors, so as to improve the measurement accuracy, avoid errors, and reduce the measurement effect of error
Active Publication Date: 2012-01-04
SANY HEAVY IND CO LTD (CN)
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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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Embodiment Construction
[0049] The present invention will be described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the present invention.
[0050] The inclination sensor can be provided with one sensitive axis, or two or more sensitive axes. For the convenience of description, the method for calibrating the zero output value of the sensitive axis of the inclination sensor provided in Embodiment 1 is described by taking an inclination sensor provided with an acceleration sensor with one sensitive axis as an example.
[0051] Such as figure 2 As shown, when starting to execute the method, it is necessary to start the calibration program module of the inclination sensor, that is, connect the corresponding circuit, obtain the corresponding initial parameters through the output terminal of the inclination sensor, or store the corresponding initial parameter...
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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 on a plane; making the sensitive shaft of the tilt angle sensor parallelling to the direction of gravity, and applying a first action force on a movable polar plate of a sensor capacitor; acquiring a first calibration factor value; applying a second action force on a movable polar plate of a sensor capacitor in the direction of the sensitive shaft; 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...
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IPC IPC(8): G01P15/125G01C25/00G01C9/00
Inventor 易小刚周翔周继辉王巍李早平
Owner SANY HEAVY IND CO LTD (CN)