Vehicle road speed signal source

Details Vehicle road speed signal source Vehicle road speed signal source

1975-07-02

1978-04-11

Blix, Trygve M.

Motor vehicles

Including one or more ski-like or runner members

With at least one surface-engaging propulsion element

73519, 324174, 361240, G01P 342

Patent

active

040834239

ABSTRACT:
A vehicle road speed signal source including a speed sensor and a frequency to voltage converter for generating a pulsed output signal having an average magnitude proportional to the road speed of an associated vehicle. The speed sensor has a high energy product magnet attached to the drive shaft of the vehicle which induces current pulses in approximately spaced pick-up coil. The pick-up coil is connected to a preamplifier having a low input impedance to reduce the effect of spurious signals such as ignition noise. The preamplifier output signal may be shaped into a square wave pulse train or may be applied directly to the frequency to voltage converter which generates a pulsed output signal having a duty cycle and therefore an average magnitude proportional to the vehicle road speed.

REFERENCES:
patent: 2719912 (1955-10-01), Maenpaa
patent: 3274443 (1966-09-01), Eggenberger
patent: 3622208 (1971-11-01), Krugler
patent: 3664711 (1972-05-01), Berry
patent: 3805161 (1974-04-01), Bayha
patent: 3868570 (1975-02-01), Kopera
patent: 3898563 (1975-08-01), Erisman

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