Security scanners with capacitance and magnetic sensor arrays

Details Security scanners with capacitance and magnetic sensor arrays Security scanners with capacitance and magnetic sensor arrays

2007-11-13

2007-11-13

Nguyen, Vincent Q. (Department: 2858)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

C324S671000, C340S562000, C382S318000

Reexamination Certificate

active

11544391

ABSTRACT:
Security scanning devices based on electrical tomography, including tomography systems based on the measurement of capacitance (ECT) and electromagnetic tomography (EMT), in combination with knowledge-based image analysis and understanding. Each device includes a sensing head or transducer, sensing electronics, image reconstruction and image analysis microprocessor (either microcontroller, DSP, laptop or desktop PC), a display unit and accompanying software for identifying dangerous materials and items. The security scanning devices enable enhancement of image resolution with ECT and EMT. More sensors, more sensitive circuits and flexible/optimal measurement protocols may be employed for obtaining more independent measurements and enable implementation of data fusion to combine the complementary sensitivity of ECT and EMT to different material properties, while providing architecture to implement image knowledge bases, which may characterize objects, whose image attributes are acquired from multiple sensors.

REFERENCES:
patent: 4796013 (1989-01-01), Yasuda et al.
patent: 6057761 (2000-05-01), Yukl

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