Collision avoidance system and collision avoidance method for detection bed

A collision avoidance system for a detection bed comprising a bed face, the system comprising:

• stress sensors configured to measure a stress caused by supporting the bed face of the detection bed with and/or without a load on the bed face and outputting corresponding stress data;
• a collector in communication with the stress sensors and is configured to collect the stress data output by each of the stress sensors;
• a judging processor in communication with the collector and configured to determine whether the collected stress data increases progressively or decreases progressively within a preset time period, wherein a progressive increase or progressive decrease in the collected stress data within the preset time period is indicative of the bed face colliding with an object;
• and
• a controller in communication with the judging processor, the controller configured to control the bed face of the detection bed so that the bed face stops moving when the judging processor determines that the collected stress data increased or decreased progressively within the preset time period.