A snap-fit height sensor and a height sensor assembly. The snap-fit height sensor is fixed to a base by means of a mounting support. The height sensor comprises a sensor body and a swing arm capable of swinging relative to the sensor body. An engagement seat is provided on the sensor body, the engagement seat being capable of receiving the mounting support and being fitted and fixed to the mounting support. The snap-fit height sensor and height sensor assembly provided in the present utility model overcome the shortcomings in the prior art, such that the mounting support and sensor have a small mounting volume, a light weight and a low cost, with simple mounting steps, few components and high efficiency.

Vehicle alignment systems and methods are disclosed which operate based on a calculation of drive direction, or the direction in which a vehicle is moving. Since a vehicle can be assumed to be a rigid body, each wheel has the same drive direction. Consequently, an alignment parameter of one wheel can be compared to the same parameter of another wheel by equating their drive direction, eliminating the need for the aligner to see both sides of the vehicle at the same time. Embodiments include a system having one or more cameras on a fixture carrying a calibration element for an ADAS system, and one or more targets placed on the vehicle to measure the drive direction of the vehicle. The drive direction is assumed to be parallel to the vehicle thrust line and can be used as the line for orientation of the fixture to the vehicle.

Vehicle alignment systems and methods are disclosed which operate based on a calculation of drive direction, or the direction in which a vehicle is moving. Since a vehicle can be assumed to be a rigid body, each wheel has the same drive direction. Consequently, an alignment parameter of one wheel can be compared to the same parameter of another wheel by equating their drive direction, eliminating the need for the aligner to see both sides of the vehicle at the same time. Embodiments include a system having one or more cameras on a fixture carrying a calibration element for an ADAS system, and one or more targets placed on the vehicle to measure the drive direction of the vehicle. The drive direction is assumed to be parallel to the vehicle thrust line and can be used as the line for orientation of the fixture to the vehicle.