SU714267A1 - Method of investigating specific electric resistance of an article - Google Patents

Method of investigating specific electric resistance of an article Download PDF

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Publication number
SU714267A1
SU714267A1 SU782568388A SU2568388A SU714267A1 SU 714267 A1 SU714267 A1 SU 714267A1 SU 782568388 A SU782568388 A SU 782568388A SU 2568388 A SU2568388 A SU 2568388A SU 714267 A1 SU714267 A1 SU 714267A1
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SU
USSR - Soviet Union
Prior art keywords
converter
voltage
article
emf
condition
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Application number
SU782568388A
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Russian (ru)
Inventor
Валентин Петрович Денискин
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Предприятие П/Я А-1857
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Priority to SU782568388A priority Critical patent/SU714267A1/en
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Publication of SU714267A1 publication Critical patent/SU714267A1/en

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(54) СПОСОБ КОНТРОЛЯ УДЕЛЬНОЮ ЭЛЕКТРИЧЕСКОГО СОПРОТИВЛЕНИЯ ИЗДЕЛИЯ (54) METHOD OF CONTROL OF SOME ELECTRIC RESISTANCE OF PRODUCT

Claims (1)

Формула изобретения Способ контроля удельного электрического сопротивления изделия, заключающийся в том, чтс возбуждают с помощью вихретокового преобразователя в контролируемом изделии выхревые токи, частоту которых устанавливают из условия a* /р >> 1, где а4- радиус преобразователя, tjj- круговая частота, Д1о -магнитная постоянная, р- удельное сопротивление, выделяют активную и реактивную составляющие· вносимой вихревыми токами ЭДС и суммируют их с помощью сумматора напряжений, отличающийся тем.., что с, целью повышения точности контроля удельного электрического сопротивления на значительной глубине, дополнительно возбуждают вихревые токи с помощью вихретокового преобразователя с радиусом Cl·^· величину которого выбирают из условия agOMJo|p << l, выделяют активную составляющую вносимой ЭДС этого преобразователя, преобразовывают напряжение с выхода сумматора с помощью функционального преобразователя с характеристикой у = х011 ^2 , делят с помощью делителя напряжений напряжение с выхода функционального преобразователя на напряжение, пропорциЬнальное активной составляющей вносимой ЭДС второго преобразователя, и по полученному напряжению судят о величине удельного электрического сопротивления.SUMMARY OF THE INVENTION A method for controlling the electrical resistivity of an article, which method involves generating currents using a eddy current transducer in a test article whose frequency is set from the condition a * / p >> 1, where a 4 is the radius of the converter, tjj is the circular frequency, of D1 is the magnetic constant, p is the resistivity, secrete active and reactive components of the eddy currents introduced · EMF and summing them using voltages of the adder, characterized in .. that, in order to increase accuracy in control Yelnia electrical resistance at considerable depths, further excite eddy currents by means of eddy current transducer with Cl · ^ · radius value of which is selected from the condition agOMJ o | p << l, secrete active component introduced by EDS of this converter, converts the voltage output from the adder via functional a converter with the characteristic y = x 011 ^ 2, using the voltage divider, divide the voltage from the output of the functional converter to a voltage proportional to the active component axial emf of the second converter, and the received voltage is used to judge the value of electrical resistivity.
SU782568388A 1978-01-10 1978-01-10 Method of investigating specific electric resistance of an article SU714267A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU782568388A SU714267A1 (en) 1978-01-10 1978-01-10 Method of investigating specific electric resistance of an article

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Application Number Priority Date Filing Date Title
SU782568388A SU714267A1 (en) 1978-01-10 1978-01-10 Method of investigating specific electric resistance of an article

Publications (1)

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SU714267A1 true SU714267A1 (en) 1980-02-05

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SU782568388A SU714267A1 (en) 1978-01-10 1978-01-10 Method of investigating specific electric resistance of an article

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SU (1) SU714267A1 (en)

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