Method for checking tightness of inner space of motor car against rain water, involves applying neutrons on interspace in inner space using neutron source, and detecting neutrons decelerated by molecules present in water by neutron detector

摘要

The method involves supplying water to a vehicle, and applying neutrons on an interspace (18) to be tested for presence of water (20) in an inner space of the vehicle using a neutron source (22) of a neutron probe (16), where the interspace is formed between a body part (12) and a carpet (14). The probe is moved relative to the portion of the inner space by a robot or an operator. The neutrons decelerated by molecules present in the water are detected by a neutron detector i.e. counter tube (28), of the probe, where the counter tube comprises helium-3 isotope. An independent claim is also included for a test set-up for checking tightness of an inner space of a vehicle.