Method and device for calibrating chest of vehicle crash dummy

A method for calibrating a chest of a vehicle crash dummy, wherein the method is applied to a device for calibrating a chest of a vehicle crash dummy, the device comprises a fixed target crash dummy and a pressing apparatus, and the pressing apparatus is provided with a pressure sensor and a displacement sensor;

• the method comprises:
• controlling, under each preset test condition, the pressing apparatus to press down a chest of the target crash dummy with a target pressing speed and a target pressing distance corresponding to the preset test condition;
• determining, based on the pressure sensor and the displacement sensor, an actual force-displacement curve of the chest of the target crash dummy under each preset test condition, wherein the actual force-displacement curve is configured to describe a changing relation between force and displacement;
• and
• obtaining a standard force-displacement curve of a chest of a standard crash dummy of a same type as the target crash dummy under each preset test condition, and determining, based on the actual force-displacement curve and the standard force-displacement curve under each preset test condition, whether the chest of the target crash dummy satisfies a biological simulation standard;
• the determining, based on the actual force-displacement curve and the standard force-displacement curve under each preset test condition, whether the chest of the target crash dummy satisfies a biological simulation standard comprises:
• for each preset test condition, determining, based on a plurality of standard force-displacement curves under the preset test condition, a standard mean curve under the preset test condition and a corridor region corresponding to the standard mean curve, wherein the corridor region covers all the standard force-displacement curves, and comprises an inner corridor region and an outer corridor region;
• and
• for each preset test condition, determining, based on the actual force-displacement curve, the standard mean curve, the inner corridor region and the outer corridor region under the preset test condition, whether the chest of the target crash dummy satisfies the biological simulation standard under the preset test condition;
• the determining, based on the actual force-displacement curve, the standard mean curve, the inner corridor region and the outer corridor region under the preset test condition, whether the chest of the target crash dummy satisfies the biological simulation standard under the preset test condition comprises:
• determining, based on the actual force-displacement curve, the standard mean curve, the inner corridor region and the outer corridor region under the preset test condition, a similarity between the actual force-displacement curve and the standard mean curve under the preset test condition;
• and
• determining, according to the similarity and a preset similarity threshold, whether the chest of the target crash dummy satisfies the biological simulation standard under the preset test condition;
• the chest of the target crash dummy comprises a plurality of preset mark points, and the device further comprises a camera aiming at the preset mark points;
• and the determining, according to the similarity and a preset similarity threshold, whether the chest of the target crash dummy satisfies the biological simulation standard under the preset test condition comprises:
• determining, based on the camera, a position point set in an initial state and a position point set in a final state of each preset mark point under the preset test condition;
• determining, based on the position point sets in the initial state and in the final state, an actual position gap between the initial state and the final state of the preset mark point;
• obtaining a maximum position gap of each preset mark point of the standard crash dummy under the preset test condition;
• and
• determining, based on the actual position gap, the maximum position gap, the similarity and the preset similarity threshold, whether the chest of the target crash dummy satisfies the biological simulation standard under the preset test condition.