| 摘要 |
A system for detecting and signalling the failure of a wheel or a wheel set of a truck or trailer type of vehicle includes a plurality of equiangularly spaced magnets fixed to the wheel rim and facing inwardly of the vehicle to define a magnet plane. An induction-type sensor is mounted to a non-rotating axle support opposite the magnets so as to have a train of electrical pulses magnetically induced therein should a rotating magnetic field created by the rotating magnets intrude into a predetermined acceptable spacing of the magnet plane from the sensor. The sensor is connected to a transformer which will step up the sensor signal to activate an indicator in the vehicle cab to warn the operator of an imminent wheel failure. The threshold signal strength is determined for each wheel of the vehicle and is based on the acceptable spacing of the magnet plane from the sensor accommodating vehicle loading and dynamic effects such a vehicle speed and anticipated road conditions. If the magnet plane intrudes into the acceptable spacing, due for example to a wheel failure caused by broken lug bolts or due to excessive overloading, the induced signal at the sensor will be stepped up by the transformer to a level that will activate the indicator in the cab. The indicator will give an audible or a visible signal to the operator and the operator should, in response thereto, stop his vehicle, inspect the wheel, and take appropriate action to correct the problem.
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