Nuclear Magnetic Resonant Imaging (also called Magnetic Resonant Imaging or MRI) devices which are implantable, internal or insertable are provided. The disclosure describes ways to miniaturize, simplify, calibrate, cool, and increase the utility of MRI systems for structural investigative purposes, and for biological investigation and potential treatment. It teaches use of target objects of fixed size, shape and position for calibration and comparison to obtain accurate images. It further teaches cooling of objects under test by electrically conductive leads or electrically isolated leads; varying the magnetic field of the probe to move chemicals or ferrous metallic objects within the subject. The invention also teaches comparison of objects using review of the frequency components of a received signal rather than by a pictorial representation.

The present invention relates to a wireless power transmission system for detecting an optimal resonance frequency and a method of detecting an optimal resonance frequency using the same, and provides a system and method for detecting an optimal resonance frequency for maximum wireless power transmission, the system and the method enabling an optimal resonance frequency for maximum power transmission to be effectively and quickly detected and enabling an optimal resonance frequency to be more precisely and accurately detected and found, even if a system usage situation changes, such as when a power transmission distance changes, in a wireless power transmission system of a magnetic resonant coupling scheme.

The present invention relates to a wireless power transmission system for detecting an optimal resonance frequency and a method of detecting an optimal resonance frequency using the same, and provides a system and method for detecting an optimal resonance frequency for maximum wireless power transmission, the system and the method enabling an optimal resonance frequency for maximum power transmission to be effectively and quickly detected and enabling an optimal resonance frequency to be more precisely and accurately detected and found, even if a system usage situation changes, such as when a power transmission distance changes, in a wireless power transmission system of a magnetic resonant coupling scheme.

Apparatus and methods for electronic monitoring of ozone generators are provided herein. In certain configurations, an ozone generator includes ozone generation circuitry for producing ozone and a control circuit that monitors the ozone generation circuitry to determine whether or not ozone is being properly produced. The control circuit includes an AC input that receives power from an AC power supply and one or more AC outputs for providing AC output voltages to the ozone generation circuitry. The control circuit further includes one or more AC current sensors used to monitor a status of ozone production by monitoring AC current flowing into the ozone generation circuitry via the control circuit's AC outputs. The control circuit alerts a user of the status of ozone production while avoiding a need for the user to test a treatment fluid for ozone concentration and/or manually inspect or test components of the ozone generator.

A probe calibration device that includes a first offset element having a substantially rectangular first aperture. The probe calibration device includes a tuned pass element disposed adjacent to the first offset element. The tuned pass element has a non-rectangular second aperture. The probe calibration device includes a second offset element disposed adjacent to the tuned pass element and on a side opposite the first offset element. The second offset element has a substantially rectangular third aperture. The probe calibration device includes a backing element disposed adjacent to the second offset element. The first offset element, the tuned pass element, the second offset element and the backing element form a cavity.

An apparatus and method are provided for detecting a resonant frequency giving rise to an impedance peak in a power delivery network used to provide a supply voltage. The apparatus includes resonant frequency detection circuitry that comprises test frequency control circuitry and a loading circuit. The test frequency control circuitry is arranged to generate control signals to indicate a sequence of test frequencies. A loading circuit is controlled by the control signals and operates from the supply voltage. In particular, in response to each test frequency indicated by the control signals, the loading circuit draws a duty-cycled current load through the power delivery network at that test frequency. Operation of the loading circuit produces a measurable property whose value varies in dependence on the supply voltage, thus enabling the resonant frequency to be determined from a variation in the value of that measurable property.

A method includes accessing a material database associating each of a plurality of materials with one or more corresponding resonance frequencies; for each material of at least a subset of the plurality of materials in the material database: transmitting, via an RF transmitter, an RF signal into a target at a first resonance frequency for each material; receiving, via an RF receiver, a response signal from the target; and analyzing the response signal for resonance characteristics that indicate a presence of each material in the target; generating a report of each material in the target indicated by the resonance characteristics; and integrating the report with at least one of: a timestamp; image or video data from a camera; or geolocation data from a geolocation sensor.

A method includes accessing a material database associating each of a plurality of materials with one or more corresponding resonance frequencies; for each material of at least a subset of the plurality of materials in the material database: transmitting, via an RF transmitter, an RF signal into a target at a first resonance frequency for each material; receiving, via an RF receiver, a response signal from the target; and analyzing the response signal for resonance characteristics that indicate a presence of each material in the target; generating a report of each material in the target indicated by the resonance characteristics; and integrating the report with at least one of: a timestamp; image or video data from a camera; or geolocation data from a geolocation sensor.

A method includes accessing a material database associating each of a plurality of materials with one or more corresponding resonance frequencies; for each material of at least a subset of the plurality of materials in the material database: transmitting, via an RF transmitter, an RF signal into a target at a first resonance frequency for each material; receiving, via an RF receiver, a response signal from the target; and analyzing the response signal for resonance characteristics that indicate a presence of each material in the target; generating a report of each material in the target indicated by the resonance characteristics; and integrating the report with at least one of: a timestamp; image or video data from a camera; or geolocation data from a geolocation sensor.