Multi-frequency wireless sensor
AssigneeInductosene Limited
InventorsAnthony Croxford, Paul Wilcox, Chenghuan Zhong
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Abstract
A multi-frequency wireless sensor for non-destructive testing of a test object, the sensor comprising: an ultrasound transducer having a plurality of operating frequencies; a first induction coil electrically coupled to the ultrasound transducer; a second induction coil; and a capacitance, connected in parallel with the second induction coil, such that the wireless sensor can operate at a first operating frequency or a second operating frequency when the sensor is excited by a remote device.
Claims7
A multi-frequency wireless excitation device for exciting a multi-frequency wireless sensor, the excitation device comprising:
- a first induction coil;
- a first capacitance electrically coupled to the first induction coil;
- a second induction coil not electrically connected to the first induction coil, but inductively coupled to the first induction coil;
- and
- a second capacitance connected in parallel with the second induction coil, such that the excitation device can generate an induction signal at a first operating frequency or a second operating frequency.
A multi-frequency wireless sensor for non-destructive testing of a test object, the sensor comprising:
- an ultrasound transducer having a plurality of operating frequencies;
- a first induction coil electrically coupled to the ultrasound transducer;
- a second induction coil, wherein the second induction coil is not electrically connected to the first induction coil, but is inductively coupled to the first induction coil;
- and
- a capacitance, connected in parallel with the second induction coil, such that the wireless sensor can operate at a first operating frequency or a second operating frequency when the sensor is excited by a remote device.
A method for non-destructive testing of an object using a multi-frequency wireless sensor for non-destructive testing of a test object, the sensor comprising an ultrasound transducer having a plurality of operating frequencies, a first induction coil electrically coupled to the ultrasound transducer, a second induction coil, and a capacitance connected in parallel with the second induction coil such that the wireless sensor can operate at a first operating frequency or a second operating frequency when the sensor is excited by a remote device, the method comprising:
- installing the sensor in or on the object to be tested;
- exciting the sensor with a guided wave excitation signal;
- receiving from the sensor a response to the guided wave excitation signal;
- and
- recording the response received from the sensor as a unique identifier for the sensor.
Dependencies are inferred from the claim text.