DEVICE TO DETECT METALLIC OBJECTS IN FLOW OF MATERIALS Russian patent published in 2008 - IPC G01V3/11 

FIELD: mechanics.

SUBSTANCE: invention relates to metal detectors. The proposed device incorporates the following components connected in series, i.e. a pickup making a high-frequency generator oscillation system, a pulse shaper, a detector, an actuator, an integrator with its control input connected to the voltage control device and a delaying device with its control input connected with the controlled material motion speed pickup. The generator self-tuning circuit incorporates a rejecter filter with an amplifier, an integrator, a delaying element, a pulse converter and two adders. The integrator and delaying element control inputs are connected to the controller material motion speed pickup output. The said integrator is connected in parallel with the rejecter filter.

EFFECT: higher reliability of detection.

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