Brake clearance detection method and device, test bed and controller

The invention relates to a brake clearance detection method and device, a test bed and a controller. The method comprises the following steps: acquiring an initial vibration parameter corresponding to a to-be-tested brake mounted on a test bed; determining test parameters required for testing the brake clearance performance of the brake to be tested; performing a vibration test on the to-be-tested brake according to the test parameters to obtain real-time vibration parameters of the to-be-tested brake in the vibration test; brake clearance judgment information is determined based on the initial vibration parameters and the real-time vibration parameters; the brake clearance judgment information is used for indicating whether the brake clearance of the to-be-detected brake is in a normal range. By adopting the method, the vibration test can be performed according to the determined test parameters instead of performing vibration according to a fixed-frequency and fixed-acceleration mode, so that the situation t