Auckland Uniservices Limited

Simon Charles Malpas

Aiguo Hu

David Mortimer Budgett

Dixon Pok Chung Leung

Michael Alexander Navakatikyan

John Daniel Mccormick

Robert John Gallichan

Bryon Elmer Wright

A wireless power transfer secondary or pick-up has a resonant circuit and a switch connected to the resonant circuit operable to produce a phase shift in an oscillating voltage or current in the resonant circuit. A controller is configured to operate the switch to introduce one or more controlled phase shifts in the oscillating voltage or current in the resonant circuit which encode data for detection by a coupled circuit.

Inductive power and data transfer using energy injection

An inductively powered sensor system includes a primary conductive pathcapable of being energised to provide an electromagnetic field in a defined space. An inductive power pick-upis associated with a sensorand is capable of receiving power from the field to supply the sensor. The system includes a first sensing means to sense the power available to the pick-upand control means to increase or decrease the power available to the sensor dependant on the sensed power available. A method of inductively powering a sensor, an inductively powered sensor and an animal enclosure including one or more primary conductive path of an inductive power supply are also disclosed.

Inductively powered mobile sensor system

An inductively powered sensor system includes a primary conductive pathcapable of being energized to provide an electromagnetic field in a defined space. An inductive power pick-upis associated with a sensorand is capable of receiving power from the field to supply the sensor. The system includes a first sensing means to sense the power available to the pick-upand control means to increase or decrease the power available to the sensor dependant on the sensed power available. A method of inductively powering a sensor, an inductively powered sensor and an animal enclosure including one or more primary conductive path of an inductive power supply are also disclosed.

The present invention provides an inductively powered sensor system having a primary conductive path capable of being energized to provide an electromagnetic field in a defined space. An inductive power pick-up is associated with a sensor and is capable of receiving power from the field to supply the sensor. The system includes a first sensing unit to sense the power available to the pick-up and a control unit to increase or decrease the power available to the sensor dependant on the sensed power available. A method of inductively powering a sensor, an inductively powered sensor and an animal enclosure including one or more primary conductive path of an inductive power supply are also disclosed.

A method of determining the location in time of maxima and/or minima of an oscillatory signal. The method may have application to measurement of biological signals, in particular measurement of heart rate from a pulsatile blood signal. The method includes a first stage including the steps of observation over a measurement period, identifying large local maxima or minima and computing an average interval between the identified local maxima or minima. One or more exclusion periods are located in time in the oscillatory signal, having a duration dependent on the average interval, the exclusion periods used to reject false maxima or minima. Maxima or minima may also be detected as an absolute maximum or minimum between crossing points of a fast and a slow moving average of the oscillatory signal. An exclusion period may also be used to reject false maxima or minima when crossing points are used. Apparatus for performing the method is also claimed.

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Auckland, New Zealand

Simon Charles Malpas