Device for transmission of measurement values
First Claim
1. A device for transmission at least of one measurement value from a moveable object to a object stationary relative to the latter, particularly from a motor vehicle wheel to the vehicle frame of a motor vehicle, with a transmitting stage and a receiving stage, which both are secured on the stationary object and a coupling element which is secured on the moveable object and via which the receiver is able to be applied with a measuring value signal, comprisinga transmitting stage means for transmitting two transmission frequency signals of different frequencies,at least one coupling element means for mixing the two different frequencies and for transmitting at least one signal with a mixing frequency,a receiving stage means for being responsive to the at least one signal with a mixing frequency transmitted from said coupling element means,said coupling element means comprises at least one oscillating circuit containing a construction element with a non-linear-current voltage characteristic curve,said coupling element means contains two parallel oscillating circuits including said at least one oscillating circuit, one of said parallel oscillating circuits lies at a frequency within a frequency range which is predetermined by the transmission frequencies, and the other of said circuits is tuned to the mixing frequency, andsaid construction element with a non-linear current-voltage characteristic curve connects both of said two parallel oscillating circuits with each other.
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Accused Products
Abstract
A device for transmission at least of one measurement value from a moveable object to an object stationary relative to the latter, particularly from a motor vehicle wheel to the vehicle frame of a motor vehicle, with a transmission stage and a receiving stage, which both are secured on the stationary object, and a coupling element which is secured on the moveable object and via which the receiver is able to be applied with a measuring value signal; characterized in the manner that a transmission stage transmits two transmission signals of different frequencies. At least one coupling element mixes the two frequencies and a receiving stage is responsive to at least one signal with a mixing frequency, which signal is transmitted by the coupling element.
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Citations
20 Claims
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1. A device for transmission at least of one measurement value from a moveable object to a object stationary relative to the latter, particularly from a motor vehicle wheel to the vehicle frame of a motor vehicle, with a transmitting stage and a receiving stage, which both are secured on the stationary object and a coupling element which is secured on the moveable object and via which the receiver is able to be applied with a measuring value signal, comprising
a transmitting stage means for transmitting two transmission frequency signals of different frequencies, at least one coupling element means for mixing the two different frequencies and for transmitting at least one signal with a mixing frequency, a receiving stage means for being responsive to the at least one signal with a mixing frequency transmitted from said coupling element means, said coupling element means comprises at least one oscillating circuit containing a construction element with a non-linear-current voltage characteristic curve, said coupling element means contains two parallel oscillating circuits including said at least one oscillating circuit, one of said parallel oscillating circuits lies at a frequency within a frequency range which is predetermined by the transmission frequencies, and the other of said circuits is tuned to the mixing frequency, and said construction element with a non-linear current-voltage characteristic curve connects both of said two parallel oscillating circuits with each other.
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14. A device for transmission at least of one measurement value from a moveable object to a object stationary relative to the latter, particularly from a motor vehicle wheel to the vehicle frame of a motor vehicle, with a transmitting stage and a receiving stage, which both are secured on the stationary object and a coupling element which is secured on the moveable object and via which the receiver is able to be applied with a measuring value signal, comprising
a transmitting stage means for transmitting two transmission frequency signals of different frequencies, at least one coupling element means for mixing the two different frequencies and for transmitting at least one signal with a mixing frequency, a receiving stage means for being responsive to the at least one signal with a mixing frequency transmitted from said coupling element means, said at least one coupling element means comprises two coupling elements having a phase displacement of 180 angular degrees from one another, said two coupling elements are adapted to be secured on the moveable object, comparison means for comparing the phase of said two coupling elements with a reference phase, said comparison means is disposed in said receiving stage means.
Specification