A three-axis self-calibration method for a vehicle-mounted acceleration sensor
A technology of acceleration sensor and acceleration sensor, which is used in the testing/calibration of speed/acceleration/shock measurement equipment, multi-dimensional acceleration measurement, speed/acceleration/shock measurement, etc. It can solve problems such as the inability to provide real-time three-axis force changes
Active Publication Date: 2016-08-24
QUECLINK WIRELESS SOLUTIONS
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Problems solved by technology
At present, the acceleration sensors on the market can only provide the magnitude of the three-axis force with a fixed sensor direction. At the same time, there are many uncertain factors in the position and horizontal angle of the vehicle-mounted electronic products, which eventually lead to the acceleration sensor being unable to provide real-time three-axis (forward Direction, lateral direction, vertical direction) force change
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Embodiment 1
[0044] Such as Figures 1 to 3 As shown, a three-axis self-calibration method of a vehicle-mounted acceleration sensor of the present invention comprises the following steps:
[0045] (1) Define the force model of the acceleration sensor
[0046] Such as figure 1 As shown, a right-handed three-dimensional coordinate system O-XYZ is established based on the force on the acceleration sensor 10 .
[0047] Such as figure 2 As shown, a new right-handed three-dimensional coordinate system generated by the acceleration sensor 10 during the actual motion of the vehicle is O-XnewYnewZnew. Xnew is the forward direction of the vehicle, that is, the direction of acceleration, Ynew is horizontal to the left, and Znew is the upward direction perpendicular to the forward direction of the vehicle, that is, the opposite direction of gravity.
[0048] Convert the three-dimensional coordinate system O-XYZ to O-XnewYnewZnew. From the transformation of linear algebra about the space coordina...
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The invention discloses a three-axis self-calibration method for a vehicle-mounted acceleration sensor, comprising the following steps: (1) defining the force model of the acceleration sensor; (2) determining the Znew axis in the coordinate system O-XnewYnewZnew; (3) determining the coordinate system The Xnew axis in O-XnewYnewZnew; (4) ensure that the Znew axis and the Xnew axis are vertical; (5) determine the Ynew axis in the coordinate system O-XnewYnewZnew; and (6) optimize the Xnew axis and the Znew axis, the present invention passes through the above steps, The acceleration sensor can be placed arbitrarily in the vehicle, and a new coordinate system can still be established with the forward direction of the vehicle as the positive direction of the X axis, the horizontal direction to the left as the positive direction of the Y axis, and the vertical direction as the positive direction of the Z axis. As a driving habit of the vehicle, the vehicle collision Basis for on-site restoration.
Description
technical field [0001] The invention relates to the field of acceleration sensor calibration, in particular to a three-axis self-calibration method for a vehicle-mounted acceleration sensor. Background technique [0002] Vehicle electronic products need to accurately provide the real-time three-axis force of the vehicle as the basis for driving habit training and vehicle collision recovery. At present, the acceleration sensors on the market can only provide the magnitude of the three-axis force with a fixed sensor direction. At the same time, there are many uncertain factors in the position and horizontal angle of the vehicle-mounted electronic products, which eventually lead to the acceleration sensor being unable to provide real-time three-axis (forward Direction, lateral direction, vertical direction) force changes. Through this patent, it is possible to provide real-time force changes in the three-axis direction of the vehicle under the condition that the vehicle-mounte...
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IPC IPC(8): G01P21/00G01P15/18
Inventor 袁学涛
Owner QUECLINK WIRELESS SOLUTIONS