ELECTRONIC SPEEDOMETER Russian patent published in 2007 - IPC G01P3/00 G01C22/00 

FIELD: automobile industry.

SUBSTANCE: speedometer, comprising revolution number indicator, having rotary rotor, amplifier of electric signals of sensor, electric motor, counter of full number of revolutions, connected to electric motor, and pointer of indicator rotation frequency, is additionally provided with rotation reducer, impulse generator, integrator, where indicator is made in form of rotor comprising two interconnected metallic plates on rotation surface, and stator, comprising two metallic plates on internal surface, positioned oppositely to rotor plates in immobile state of the rotor, where rotor of indicator is connected to output shaft of reducer, one plate of stator is connected to input of amplifier and through a resistor to power supply of onboard network, second plate is connected to mass, output of amplifier is connected to input of generator, output of generator is connected to electric motor and input of integrator, output of motor is connected to counter of full number of revolutions, output of integrator is connected to pointer of rotation frequency of indicator rotor.

EFFECT: increased reliability of speedometer operation, expanded technical characteristics thereof, reduced manufacturing cost.

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