Disk mounting arrangement and wireless angular velocity detector.

摘要

A mounting device is secured about a rotating shaft such that it rotates along with the shaft. The device includes a plurality of interconnecting members that, when assembled, defines a central opening to receive the rotating shaft. An elastomeric grommet is positioned between the shaft and the members at the central opening to securely engage the shaft with the device and ensure that there is no relative rotational movement therebetween. The device may include accessories attached thereto such as reflectors, lights, and transmitters. The transmitter may be part of a wireless velocity detector for a bicycle which includes a coil mounted on the wheel hub of the bicycle which generates a rotating magnetic field as the wheel rotates, a receiver mounted on the handlebars that includes a pair of coils that sense variations in the strength of the rotating field as the bicycle moves and generates signals in response to the field variations and a microprocessor which converts the signals into information related to the movement of the bicycle, e.g. speed and distance. A liquid crystal display is used to display the information to the cyclist.