Vehicle suspension attitude measurement method and system

A vehicle suspension and measurement method technology, which is applied in the field of vehicle suspension state detection, can solve the problems of poor practicability and low accuracy, and achieve the effects of clear motion boundaries, small installation space, and flexible installation

A vehicle suspension and measurement method technology, which is applied in the field of vehicle suspension state detection, can solve the problems of poor practicability and low accuracy, and achieve the effects of clear motion boundaries, small installation space, and flexible installation

CN113865616AActive Publication Date: 2021-12-31成都九鼎科技(集团)有限公司
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  • Vehicle suspension attitude measurement method and system
  • Vehicle suspension attitude measurement method and system
  • Vehicle suspension attitude measurement method and system

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Embodiment Construction

[0089] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments.

[0090] refer to figure 1 , in this embodiment, 8 IMU modules are used to collect the data at the corresponding positions of the four wheels of the vehicle suspension respectively. The IMU modules here are existing inertial measurement units, usually composed of 3 accelerometers and 3 gyroscopes A combined unit for collecting acceleration and angular velocity data at the installation location.

[0091] Combine below figure 1 with figure 2 The vehicle suspension attitude measurement method in this embodiment is described in detail. In this embodim...

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Abstract

The invention discloses a vehicle suspension attitude measurement method and system. A direction cosine matrix is obtained through attitude calculation in a measurement processing process, the acceleration data of a carrier is converted into an inertial coordinate system, the influence of gravity is eliminated, and the motion (non-vehicle driving motion) of a wheel bracket and a vehicle body in a vehicle suspension motion boundary can be accurately measured, so that the obtained telescopic motion data of the shock absorber is more accurate; and meanwhile, the method and the system have good low-frequency or zero-frequency measurement precision, are not affected by the terrain and the vehicle attitude in the measurement process, can accurately measure the pose motion state of the key point in a vehicle suspension system, and provide reliable reference for detection and control of the vehicle suspension system.

Description

technical field [0001] The invention relates to the technical field of vehicle suspension state detection, in particular to a vehicle suspension attitude test method and a measurement system. Background technique [0002] As an important part of the vehicle, the suspension system directly affects the ride comfort and operational stability of the vehicle. In the adjustable suspension system (semi-active suspension and active suspension system), the measurement of vehicle suspension pose is essential. At present, the pose measurement of the suspension system is mainly realized by installing an acceleration sensor or a displacement sensor between the vehicle body (sprung) and the wheel bracket (unsprung); Changes at any time, so there is often the problem that gravity affects the detection results. If a piezoelectric acceleration sensor is used, the acceleration measurement of zero frequency or even low frequency state is inaccurate; and if a displacement sensor is used, sinc...

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Application Information

Patent Timeline
31 Dec 2021
Publication
CN113865616A
IPC
G01C23/00; G01M17/04
CPC
G01C23/00; G01M17/04
Inventors
廖安志; 唐兵