Process for transmitting signals between two elements and device for carrying out said process
First Claim
1. A process for transmitting signals between a first element, in particular a rotary element, and a second element, said process comprising the steps of measuring values relating to at least one parameter in one of said elements to produce measured values, processing each measured value in the form of signals for transmission to a receiving means of the other element through coupling means, associating with each measured value for transmission through said coupling means a duration which is a function of said measured value, said processing step comprising first transmitting through said coupling means a first of said signals of short duration adapted for transmission through said coupling means, thereafter transmitting no signals through said coupling means for a period the duration of which is a function of said measured value and independent of conditions of transmission of said first signal and, at an end of said period of no signal transmission, transmitting a second signal of short duration also adapted for transmission through said coupling means, the second signal being distinctly different from the first signal, and converting the elapsed time between a said first signal and a said second signal directly following that first signal into a parameter value by a means responsive to said elapsed time.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and apparatus are provided wherein there is associated with each value of a measurement of a parameter such as pressure, for transmission through an electromagnetic coupling device, a time duration or period which is a function of the measured value. A first, start signal of relatively short duration is transmitted and thereafter, at the end of a period which is a function of the parameter, a second, ending signal of relatively short duration is transmitted. A receiving device which is responsive to said signals, measures the elapsed time between them, i.e., measures the length of the intervening period, and converts this measurement into a measure of the parameter.
28 Citations
28 Claims
- 1. A process for transmitting signals between a first element, in particular a rotary element, and a second element, said process comprising the steps of measuring values relating to at least one parameter in one of said elements to produce measured values, processing each measured value in the form of signals for transmission to a receiving means of the other element through coupling means, associating with each measured value for transmission through said coupling means a duration which is a function of said measured value, said processing step comprising first transmitting through said coupling means a first of said signals of short duration adapted for transmission through said coupling means, thereafter transmitting no signals through said coupling means for a period the duration of which is a function of said measured value and independent of conditions of transmission of said first signal and, at an end of said period of no signal transmission, transmitting a second signal of short duration also adapted for transmission through said coupling means, the second signal being distinctly different from the first signal, and converting the elapsed time between a said first signal and a said second signal directly following that first signal into a parameter value by a means responsive to said elapsed time.
-
23. A device for carrying out a process for transmitting signals between a first element, in particular a rotary element, and a second element and comprising the steps of measuring values relating to at least one parameter in one of said elements to produce measured values, processing each measured value in the form of signals for transmission to a receiving means of the other element through coupling means, associating with each measured value for transmission through said coupling means a duration which is a function of said measured value, said processing step comprising first transmitting through said coupling means a first of said signals of short duration adapted for transmission through said coupling means, thereafter transmitting no signals through said coupling means for a period the duration of which is a function of said measured value and independent of conditions of transmission of said first signal and, at an end of said period of no signal transmission, transmitting a second signal of short duration also adapted for transmission through said coupling means, the second signal being distinctly different from the first signal, and converting the elapsed time between a said first signal and a said second signal directly following that first signal into a parameter value by a means responsive to said elapsed time,
said device comprising, on said first element, at least one detector for at least one parameter to be measured, and an electronic circuit associated with said detector, said electronic circuit comprising means for converting the parameter value measured by the detector into a duration which is a function of said measured value, and means for producing a first signal at the start of said duration and a second signal at the end of said duration and for sending said signals to said coupling means.
Specification