Space rotating angle measuring method based on double-shaft obliquity sensor

A dual-axis inclination and angle measurement technology, used in measuring devices, measuring angles, instruments, etc., to solve problems such as inaccurate measurement and inability to measure spatial rotation angles.

Inactive Publication Date: 2012-12-05
XI AN JIAOTONG UNIV
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Problems solved by technology

However, the existing inclination sensors and their modules have two disadvantages: 1) They can only measure static angles, that is, they can only measure the angle between the current plane and the horizontal plane, and cannot measure the space when there is an angle between the rotation axis and the horizontal plane Rotation angle; 2) It is required that the sensor and its housing must be installed on a horizontal plane, otherwise the measurement will be inaccurate

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  • Space rotating angle measuring method based on double-shaft obliquity sensor
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  • Space rotating angle measuring method based on double-shaft obliquity sensor

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Embodiment Construction

[0031] The present invention is described in further detail below in conjunction with accompanying drawing:

[0032] see figure 1 , the present invention is based on the spatial rotation angle measurement method of the biaxial inclination sensor as follows:

[0033] The two axes of the dual-axis inclination sensor are perpendicular to each other, and its output voltage is the sine value of the angle referenced to the horizontal plane. Take the rotation axis as the Y axis, set the counterclockwise rotation direction as positive, and the rotation angle as θ, its projection on the horizontal plane is the y axis, the intersection point of the two axes is o, and set the angle β between the rotation axis and the horizontal plane, that is, β=∠ Yoy, β∈[0,π / 2], such as figure 1 shown. The z-axis is perpendicular to the horizontal plane, and the direction of the x-axis is set to form a right-handed Cartesian coordinate system xyzo. Let the X-axis and the x-axis coincide, and the Z-a...

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Abstract

The invention discloses a space rotating angle measuring method based on a double-shaft obliquity sensor. The method is to establish a physical model between a sensor and a rotating shaft through a measuring module formed by a double-shaft sensor according to three unknown space angles formed based on an installation mode of the sensor and a spatial relation among the rotating shafts, so as to obtain a calculation method of the three unknown installing angles, so that the rotating angle around the space rotating shafts is detected. According to the traditional technology of detecting an angle through an obliquity sensor, the rotating shafts of a detected object must be levelly arranged, and the sensor and the measuring module also must be kept in level state, all the operations are hard to implement in engineering; compared with traditional technology, the method disclosed by the invention has the advantages that the space rotating angle measuring method can be achieved only if the module is arranged not close and vertical to the level, thereby the space rotating angle measuring method is beneficial for the application in engineering.

Description

technical field [0001] The invention belongs to the technical field of geometric length measurement, and relates to a method for measuring a spatial rotation angle, in particular to a method for measuring a spatial rotation angle based on a biaxial inclination sensor. Background technique [0002] In the prior art, there are many methods for angle measurement, such as mechanical pointer goniometer, laser measurement of rotation angle, electronic compass, inclination sensor and gyroscope. [0003] The mechanical pointer angle measuring instrument is only suitable for the situation that the spatial rotation axis is parallel to the horizontal plane. Because of the mechanical angle measuring instrument, the swing of the pointer depends on the gravity and the small friction of the pointer shaft. If the rotating shaft is tilted, the friction of the pointer shaft will increase, resulting in inaccurate pointer swing. The electronic compass is based on the weak geomagnetic direction...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C1/00
Inventor 曹建安吴昊王亮张乐平苗励文
Owner XI AN JIAOTONG UNIV
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