Apparatus for measuring vehicle running condition

Details Apparatus for measuring vehicle running condition Apparatus for measuring vehicle running condition

1994-09-30

1996-04-30

Williams, Hezron E.

Measuring and testing

Testing of apparatus

324166, 324168, 324171, 324433, 73489, 73490, 340432, G01R 100, G01P 3487, B60L 100

Patent

active

055114350

ABSTRACT:
A battery-powered rotation detector detects passing of a rotating magnet attached to a vehicle wheel to generate and transmit a rotation signal. A receiver receives the rotation signal. A processor computes the vehicle running condition (e.g., speed, traveled distance) from the received rotation signal and displays the results on a display device. The processor monitors intervals between the rotation signals to detect when the vehicle is stopped. When the vehicle is stopped, the processor disconnects a battery power supply from components such as the display device for power savings. In addition, the processor checks the strength of the received rotation signal to determine a capacity of the battery in the rotation detector, and operatively indicates a power failure of the rotation detector.

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Patent Abstracts of Japan, vol. 9, No. 27 (E-294) Feb. 6, 1989 & JP-A-59 172 745 (Matsushita Denshi Kogyo).
Proceedings of the IEEE Multi-Chip Module Conference MCMC-93, Mar. 1993, Santa Cruz, CA. US., pp. 74-78, Ostmann et al., The Pretreatment of Aluminum Bondpads for Electroless Nickel Plating.
Solid State Technology, vol. 33, No. 6, Jun. 1990, Washington US, pp. 91-94, LO and TJHIA, Backsputtering Etch Studies in Wafer Bumping Process.

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