TERRESTRIAL RADIATION PROTECTION DEVICE Russian patent published in 2011 - IPC A61N1/16 G01S17/02 G01R27/28 

FIELD: medicine.

SUBSTANCE: invention refers to medical equipment, namely to devices for recording and estimating a phase shift deviation of terrestrial radiation in two different space points. The device comprises an electrical antenna 1, a reference frequency generator 6, series preliminary amplifier 4 with one noninverting and two inverting inputs, discontinuous filter 5, alternating current amplifier 7, phase detector 8, first integrator 9, direct-current amplifier 12, low-pass filter 16, indicator element 17, corrector 10, integrator reset button 15, first feedback loop comprising a feedback coefficient unit 11, and second feedback loop comprising a differentiating unit 13, nonlinear "dead space" element 14, analogue-to-digital converter 30 and digital indicator element 31, high-conductivity metal shield 2. The first inverting input of the preliminary amplifier 4 is connected to an output of the antenna 1; an output of the reference frequency generator 6 is connected to second inputs of the discontinuous filter 5 and the phase detector 8. An input of the feedback coefficient unit 11 is connected to an output of the first integrator 9, and an output is connected to the noninverting input of the preliminary amplifier 4. A first input of the differentiating unit 13 is connected to an output of the direct-current amplifier 12. An input of the nonlinear "dead space" element 14 is connected to an output of the differentiating unit 13, and an output is connected to a second inverting input of the preliminary amplifier 4. An output of the integrator reset button 15 is connected to the second input of the differentiating unit 13; an output of the corrector 10 is connected to a second input of the first integrator 9. The corrector 10 represents a second integrator 22 and a zero button 18. An output of the second integrator 22 is an output of the corrector 10, and an input of the second integrator 22 is connected to an output of the button 18, input of which is an input of the corrector 10 and is connected to an output of the low-pass filter 16. The output of the corrector 10 is connected to an input of the analogue-to-digital converter 30, output of which is connected to an input of a digital indicator element 31. The high-conductivity metal shield 2 is represented by a plate arranged between the antenna 1 and the preliminary amplifier 4. An output of the antenna 1 connected to the first inverting input of the preliminary amplifier 4 is electrically shielded. The shielding is electrically connected to the plate of the antenna shield and a common wire.

EFFECT: use of the device shall provide higher terrestrial radiation immunity.

3 cl, 1 dwg