Method for remote measuring of a physical variable
First Claim
1. A method for remote measuring a physical variable comprisingtransmitting an RF signal, by an RF transceiver, to an RF transponder comprising a dielectric material having a dielectric property which is dependent on said physical variable according to a first function and which dielectric material is exposed to said physical variable to be measured, wherein the dielectric property varies with variations in the physical variable as a result of direct exposure to an environment defining the physical variable, the transponder being arranged to receive the signal transmitted by the transceiver;
- receiving a reflection signal, by the RF transceiver, that is reflected from the RF transponder, said reflection signal being a signal which is dependent on the signal transmitted by the transceiver and on the actual dielectric property according to a second function;
comparing, by a processing means, the signal transmitted by the transceiver and the reflection signal received from the transponder; and
converting, by the processing means, the comparison result into a value which is representative for the physical variable to be measured by applying said first function and second function.
1 Assignment
0 Petitions
Accused Products
Abstract
System for remote measuring a physical variable comprising an RF transceiver arranged for transmitting an RF signal and for receiving a reflection signal derived from the transmitted signal. An RF transponder comprises a dielectric material having a dielectric property which is dependent on the physical variable according to a first function. The dielectric material is exposed to the physical variable to be measured. The transponder is arranged to receive the signal transmitted by the transceiver and to reflect a reflection signal, or the second and/or higher harmonics of it, which is dependent on the actual dielectric property. Processing means are provided for comparing the signal transmitted by the transceiver and the reflection signal received from the transponder and for converting the comparison result, e.g. the phase shift, into a value which is representative for the physical variable to be measured. The transponder may be e.g. a patch antenna.
-
Citations
12 Claims
-
1. A method for remote measuring a physical variable comprising
transmitting an RF signal, by an RF transceiver, to an RF transponder comprising a dielectric material having a dielectric property which is dependent on said physical variable according to a first function and which dielectric material is exposed to said physical variable to be measured, wherein the dielectric property varies with variations in the physical variable as a result of direct exposure to an environment defining the physical variable, the transponder being arranged to receive the signal transmitted by the transceiver; -
receiving a reflection signal, by the RF transceiver, that is reflected from the RF transponder, said reflection signal being a signal which is dependent on the signal transmitted by the transceiver and on the actual dielectric property according to a second function; comparing, by a processing means, the signal transmitted by the transceiver and the reflection signal received from the transponder; and converting, by the processing means, the comparison result into a value which is representative for the physical variable to be measured by applying said first function and second function. - View Dependent Claims (2, 3, 4)
-
-
5. A system for remote measuring a physical variable comprising
an RF transceiver arranged for transmitting an RF signal and for receiving a reflection signal which is derived from said transmitted signal; -
an RF transponder comprising a dielectric material having an dielectric property which is dependent on said physical variable according to a first function and which dielectric material, in operation, is exposed to said physical variable to be measured;
wherein the dielectric property varies with variations in the physical variable as a result of direct exposure to an environment of the physical variable, the transponder being arranged to receive the signal transmitted by the transceiver and to reflect, as said reflection signal, a signal which is dependent on the signal transmitted by the transceiver and of the actual dielectric property according to a second function; anda processor for comparing the signal transmitted by the transceiver and the reflection signal received from the transponder and for converting the comparison result into a value which is representative of the physical variable to be measured by applying said first function and second function. - View Dependent Claims (6, 7, 8, 9, 10)
-
-
11. A method for remote measuring of a physical variable comprising
receiving an RF signal at an RF transponder comprising a dielectric material having a dielectric property which is dependent on said physical variable according to a first function and which dielectric material is exposed to said physical variable to be measured, wherein the dielectric property varies with variations in the physical variable as a result of direct exposure to an environment defining the physical variable, the transponder being arranged to receive the signal transmitted by an RF transceiver; - and
reflecting a reflection signal from the RF transponder, said reflection signal being a signal which is dependent on the signal transmitted by the transceiver and on the actual dielectric property according to a second function. - View Dependent Claims (12)
- and
Specification