Inductively interrogated passive sensor apparatus
First Claim
1. A sensor apparatus which comprises:
- a first magnetic transducer which in use is positioned on a first side of a barrier, the first transducer being configured to generate a first purely magnetic field; and
a second magnetic transducer which in use is positioned on a second side of the barrier opposite the first side, the second transducer comprising a magnetic or electrical property which is dependent upon a sensible condition on the second side of the barrier and a sensor coil which is configured to generate a second purely magnetic field;
wherein in operation of the sensor apparatus the first transducer generates the first magnetic field, which induces the sensor coil to generate the second magnetic field, the second magnetic field being dependent upon the magnetic or electrical property of the second transducer; and
wherein the first transducer detects the second magnetic field and in response thereto generates a signal which is representative of the sensible condition on the second side of the barrier.
7 Assignments
0 Petitions
Accused Products
Abstract
A sensor apparatus comprises a first magnetic transducer which in use is positioned on a first side of a barrier and a second magnetic transducer which in use is positioned on a second side of the barrier opposite the first side. The second transducer comprises a magnetic or electrical property which is dependent upon a sensible condition on the second side of the barrier, such as the pressure or temperature on the second side of the barrier. In operation, the first transducer generates a first magnetic field which induces the second transducer to generate a second magnetic field that is dependent upon the magnetic or electrical property of the second transducer. The first transducer detects the second magnetic field and generates a signal which is representative of the sensible condition on the second side of the barrier.
-
Citations
88 Claims
-
1. A sensor apparatus which comprises:
-
a first magnetic transducer which in use is positioned on a first side of a barrier, the first transducer being configured to generate a first purely magnetic field; and a second magnetic transducer which in use is positioned on a second side of the barrier opposite the first side, the second transducer comprising a magnetic or electrical property which is dependent upon a sensible condition on the second side of the barrier and a sensor coil which is configured to generate a second purely magnetic field; wherein in operation of the sensor apparatus the first transducer generates the first magnetic field, which induces the sensor coil to generate the second magnetic field, the second magnetic field being dependent upon the magnetic or electrical property of the second transducer; and wherein the first transducer detects the second magnetic field and in response thereto generates a signal which is representative of the sensible condition on the second side of the barrier. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
-
-
29. A sensor apparatus which comprises:
-
a first magnetic transducer which in use is positioned on a first side of a conductive barrier the first transducer being configured to generate a first magnetic field which is capable of passing through the barrier; and a second magnetic transducer which in use is positioned on a second side of the barrier opposite the first side, the second transducer comprising a magnetic or electrical property which is dependent upon a sensible condition on the second side of the barrier and being configured to generate a second magnetic field which is capable of passing through the barrier; wherein in operation of the sensor apparatus the first transducer generates the first magnetic field, which induces the second transducer to generate the second magnetic field, the second magnetic field being dependent upon the magnetic or electrical property of the second transducer; and wherein the first transducer detects the second magnetic field and in response thereto generates a signal which is representative of the sensible condition on the second side of the barrier. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56)
-
-
57. A sensor apparatus which comprises:
-
a first magnetic transducer which in use is positioned on a first side of a barrier, the first transducer con d to a first purely magnetic field; and a second magnetic transducer which in use is positioned on a second side of the barrier opposite the first side, the second transducer comprising a magnetic or electrical property which is dependent upon a sensible condition on the second side of the barrier and a sensor coil which is configured to generate a second purely magnetic field; wherein in operation of the sensor apparatus the first transducer continuously generates the first magnetic field, which induces the sensor coil to continuously generate the second magnetic field, the second magnetic field being dependent upon the magnetic or electrical property of the second transducer; and wherein as the first transducer is transmitting the first magnetic field it detects the second magnetic field and in response thereto generates a signal which is representative of the sensible condition on the second side of the barrier. - View Dependent Claims (58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84)
-
- 73. The sensor apparatus of clam 72, wherein the first receiver coil is positioned partially between the transmitter coils on one side of the transmitter coils and the second receiver coil is positioned partially between the transmitter coils on the diametrically opposite side of the transmitter coils.
-
85. A method for detecting a sensible condition on a first side of a barrier from a second side of the barrier opposite the first side, the method comprising:
-
positioning a magnetic transducer on the first side of the barrier, the transducer comprising a magnetic or electrical property which is dependent upon a sensible condition on the first side of the barrier and a sensor coil which is configured to generate a purely magnetic field; generating a first purely magnetic field on the second side of the barrier to induce the sensor coil to generate a second purely magnetic field which is dependent upon the magnetic or electrical property of the transducer; detecting the second magnetic field on the second side of the barrier; and generating a signal in response to the second magnetic field which is representative of the sensible condition on the second side of the barrier. - View Dependent Claims (86, 87, 88)
-
Specification