Slope measurement method and device

Abstract

The embodiment of the invention discloses a gradient measurement method and device. The method comprises the following steps: acquiring an x1 axis accelerated speed and a y1 axis accelerated speed, which are output by a multi-axis accelerated speed sensor; calculating to obtain a first coordinate value (x1, y1, z1) corresponding to the x1 axis accelerated speed and the y1 axis accelerated speed in an accelerated speed sensor coordinate system; calculating a second coordinate value (x2, y2, z2) corresponding to the first coordinate value (x1, y1, z1) in a whole vehicle coordinate system according to a conversion matrix of the whole vehicle coordinate system and the accelerated speed sensor coordinate system; and calculating a whole vehicle gradient value according to a transverse coordinate value (x2) in the second coordinate value (x2, y2, z2). By virtue of the technical scheme, the gradient value of a whole vehicle can be accurately obtained under the condition that an arrangement manner of the multi-axis accelerated speed sensor in the whole vehicle is not limited.

Description

technical field [0001] The invention relates to the technical field of automobile measurement, and more specifically relates to a slope measurement method and device. Background technique [0002] At present, the electronic parking brake system (EPB, Electrical Park Brake) can not only realize the function of the traditional mechanical handbrake, but also introduce some advanced functions such as re-clamping, auxiliary slope start and emergency braking. [0003] The realization of the EPB function requires an important information input, that is, slope information. In the prior art, for vehicles with higher configuration, the slope information can be obtained directly from the vehicle network, but for vehicles with lower configuration, the entire vehicle cannot provide slope information. , As a result, the EPB function cannot be realized in vehicles with lower configuration. [0004] For vehicles whose vehicle network cannot provide slope information, how to realize the EPB...

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Problems solved by technology

[0003] The realization of the EPB function requires an important information input, that is, slope information. In the prior art, for vehicles with higher configuration, the slope information can be obtained directly from the vehicle network, but for vehicles with lower configuration, the entire vehicle cannot provide slope information. , resulting in that the EPB function cannot be realized in vehicles with lower configuration

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