Calibration system and four-wheel aligner

A four-wheel aligner, comprising a calibration system;

• wherein the calibration system comprises:
• a first device, comprising a first camera;
• and
• a second device, used in pairs with the first device, and comprising a calibration member, wherein the first device and the second device are respectively arranged on a side of a vehicle to be detected where a wheel to be measured is arranged;
• the first camera of the first device is configured to obtain first image information of the first camera and the calibration member of the second device located on an opposite side;
• and
• a control device, connected to the first camera, and is configured to receive the first image information from the first camera and process the first image information;
• wherein the first device and the second device both comprise two second cameras;
• the two second cameras of the first device are configured to obtain second image information of auxiliary tools on a front wheel and a rear wheel on a side of the vehicle to be detected, and the two second cameras of the second device are configured to obtain second image information of auxiliary tools on a front wheel and a rear wheel on another side of the vehicle to be detected;
• the control device is connected to each of the second cameras to receive each of the second image information and process the second image information.