Magnetic field exposure sensor and analysis system
AssigneeLepel Corp.
InventorsMario Metodiev, Metodi Filipov
Life of this patent
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Abstract
A compact magnetic field exposure sensor and analysis system suitable for use in the calibration of induction heating processes such as foil cap sealing or the heat treatment of metals. The compact sensor is a self-contained sensing coil, and signal storage, processing and/or transmittingcomponents that can be configured to suit narrow-mouth containers. Detected and/or processed signals can be transmitted to remote storage, processing and/or display subsystems from the sensor.
Claims19
A magnetic field exposure sensor for use in a high frequency induction treatment operation of a member, during which operation the sensor passes beneath an induction coil in which a current flow produces a high frequency magnetic field, the sensor comprising:
- an enclosure;
- a magnetic field sensing coil for sensing the high frequency magnetic field, the sensing coil disposed in a part of the enclosure;
- a circuit board contained within the enclosure, an edge of the circuit board abutting the part of the enclosure in which the sensing coil is disposed, the circuit board comprising:
- processing circuitry further comprising:
- means for producing a signal proportional to the peak value of the magnetic field as sensed by the sensing coil;
- means for producing an overall power profile from the signal proportional to the peak value of the magnetic field, the overall power profile being the peak value of the magnetic field as the sensor passes beneath the induction coil;
- means for converting the signal proportional to the peak value of the magnetic field into a first digital data;
- means for converting the overall power profile into a second digital data;
- means for storing the first and second digital data in a digital storage device;
- and
- transmitting circuitry comprising means for transmitting the digital data to a remote receiver.
A magnetic field exposure sensor suitable for use in an induction heat sealing process for heat sealing the metal foil wad elements in a closure to a container to be closed by the closure, during which operation each closure passes beneath an induction coil of an induction heat sealing apparatus, a current flow in the induction coil producing a high frequency magnetic field, the sensor removable attachable to the closure, the sensor comprising:
- an enclosure;
- a magnetic field sensing coil for sensing the high frequency magnetic field, the sensing coil disposed in a part of the enclosure;
- a circuit board contained within the enclosure, an edge of the circuit board abutting the part of the enclosure in which the sensing coil is disposed, the circuit board comprising:
- processing circuitry further comprising:
- means for producing a signal proportional to the peak value of the magnetic field as sensed by the sensing coil;
- means for producing an overall power profile from the signal proportional to the peak value of the magnetic field, the overall power profile being the peak value of the magnetic field as the sensor passes beneath the induction coil;
- and
- means for converting the signal proportional to the peak value of the magnetic field into a frequency modulated radio frequency signal;
- means for converting the overall power profile into a frequency modulated radio frequency signal;
- and
- transmitting circuitry comprising means for transmitting the frequency modulated radiofrequency signal to a remote receiver in real time for further processing.
Dependencies are inferred from the claim text.