Device to measure disruptions in a controlled magnetic field
AssigneeOntech Security, Sl
InventorJuan Aponte Luis
Life of this patent
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Abstract
A device for measuring disruptions in a controlled magnetic field and generated by the device itself surrounding a sole conductive element, antenna or electrode and comprising, at least: a controlled magnetic field sensor comprising, in turn, an oscillator circuit connected to at least one electrode, a digital module; and a processor connected to the digital module. The applications of the device that is the object of the invention are all those requiring the detection of an object prior to it resulting in the violation of the restricted space. Amongst these applications we can highlight the following: the localisation of people, industrial security applications, robotics, domestic security applications, military applications and vehicle security applications.
Claims14
A device for measuring disruptions in a controlled magnetic field and generated by the device itself surrounding a sole conductive element, antenna or electrode and comprising:
- a controlled magnetic field sensor connected in a closed loop to the electrode comprising:
- an oscillator circuit connected to the electrode;
- a digital module;
- and
- a processor connected to the digital module;
- wherein an output signal of an active element of the oscillator circuit is connected to a primary winding (L2) of a transformer (L1, L2) whereas a signal at the electrode which is connected to a secondary winding (L1) of the transformer (L1, L2) is further connected to an input (MIN) of the active element of the oscillator circuit via a feedback network (RF, CF);
- and wherein the oscillator circuit comprises a polarisation network (RBIAS, VBIAS) configured to polarise, at least, one input transistor (MIN) of the active element of the oscillator circuit;
- wherein the output signal generated by the active element of the oscillator circuit generates a controlled magnetic field in the electrode and this signal feedbacks the input (MIN) of the active element of the oscillator circuit by means of the feedback network (RF, CF), and
- wherein the digital module is connected to the input (MIN) of the active element of the oscillator circuit and arranged to digitally process the signal that recharges the input (MIN) of the active element of the oscillator circuit such that the signal can be acquired by the processor.
Dependencies are inferred from the claim text.