SU422324A1 - Device for nondestructive inspection of dielectric materials - Google Patents

Device for nondestructive inspection of dielectric materials Download PDF

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Publication number
SU422324A1
SU422324A1 SU691327353A SU1327353A SU422324A1 SU 422324 A1 SU422324 A1 SU 422324A1 SU 691327353 A SU691327353 A SU 691327353A SU 1327353 A SU1327353 A SU 1327353A SU 422324 A1 SU422324 A1 SU 422324A1
Authority
SU
USSR - Soviet Union
Prior art keywords
frequency
electrode
counter
permittivity
measuring
Prior art date
Application number
SU691327353A
Other languages
Russian (ru)
Inventor
И.Г. Матис
Э.Э. Клотиньш
К.А. Бергманис
Original Assignee
Институт Механики Полимеров Ан Латвсср
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Институт Механики Полимеров Ан Латвсср filed Critical Институт Механики Полимеров Ан Латвсср
Priority to SU691327353A priority Critical patent/SU422324A1/en
Priority to DK222770A priority patent/DK127347B/en
Priority to GB1275324D priority patent/GB1275324A/en
Priority to DE19702021811 priority patent/DE2021811C3/en
Priority to FR7016413A priority patent/FR2047332A5/fr
Priority to CS311270A priority patent/CS154744B1/cs
Application granted granted Critical
Publication of SU422324A1 publication Critical patent/SU422324A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
    • G01N27/223—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance for determining moisture content, e.g. humidity

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

1275324 Measuring permittivity INSTITUT MEKHANIKI POLIMEROV AKADEMII NAUK LATVIISKOI SOVETSKOI SOTSIALISTICHESKOI RESPUBLIKI 4 May 1970 [5 May 1969] 21310/70 Heading G1U In order to measure the permittivity of a block of material 4, the material is positioned adjacent three electrodes 1, 2, 3, the third being selectively connectable 6 to either of the first two, which together form a capacitor determining the frequency of a measuring oscillator 5, and the following sequence of operations is performed:- (a) Firstly the third electrode 3 is connected 6 to the first electrode 1, as shown, a counter 11 is cleared 12 to zero, the resulting frequency f 1 of the measuring oscillator 5 is mixed 10 with a reference frequency f 0 , which is designed to be less than the frequency f 1 , from a reference oscillator 9, and the counter is allowed to count cycles of the lower side band f 1 -f 0 , for a reference period, and (b) Secondly the third electrode 3 is connected to the second electrode 2, the resulting frequency f 2 is mixed as before with the reference frequency f 0 which is designed to be larger than the frequency f 2 , and the counter 11 is allowed to increase its previous count by counting cycles of the lower side band f 0 -f 2 for a further reference period. Providing that certain design conditions, discussed in the specification, are satisfied, the final count will be proportional to the required permittivity and will be independent of any errors caused by air gaps between the electrodes and the material under examination.

Description

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Claims (1)

УСТРОЙСТВО ДЛЯ НЕРАЗРУШАЮЩЕГО КОНТРОЛЯ ДИЭЛЕКТРИЧЕСКОЙ ПРОНИЦАЕМОСТИ МАТЕРИАЛОВ, содержащее высокочастотный генератор, к контуру которого подключен измерительный конденсатор, опорный генератор, смеситель и частотомер, отличающееся тем, что, с целью повышения точности, в качестве измерительного конденсатора использована система ленточных электродов с переключателем электродов на минимальную и максимальную глубину проникновения электрического поля в исследуемый материал, а блок сброса показаний частотомера соединен с его счетчиком через ключ, управляемый синхронно с переключателем электродов измерительного конденсатора.DEVICE FOR NON-DESTRUCTIVE CONTROL OF DIELECTRIC PERMEABILITY OF MATERIALS, containing a high-frequency generator, to the circuit of which a measuring capacitor, a reference generator, a mixer and a frequency meter are connected, characterized in that, in order to improve accuracy, a tape electrode system with a minimum electrode switch and an electrode switch is used the maximum depth of penetration of the electric field into the test material, and the frequency meter reading reset unit is connected to its counter through a switch controlled synchronously with the switch of the measuring capacitor electrodes.
SU691327353A 1969-05-05 1969-05-05 Device for nondestructive inspection of dielectric materials SU422324A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
SU691327353A SU422324A1 (en) 1969-05-05 1969-05-05 Device for nondestructive inspection of dielectric materials
DK222770A DK127347B (en) 1969-05-05 1970-05-01 Installations for measuring the dielectric constant of materials.
GB1275324D GB1275324A (en) 1969-05-05 1970-05-04
DE19702021811 DE2021811C3 (en) 1969-05-05 1970-05-04 Device for measuring the dielectric constant of substances
FR7016413A FR2047332A5 (en) 1969-05-05 1970-05-05
CS311270A CS154744B1 (en) 1969-05-05 1970-05-05

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU691327353A SU422324A1 (en) 1969-05-05 1969-05-05 Device for nondestructive inspection of dielectric materials

Publications (1)

Publication Number Publication Date
SU422324A1 true SU422324A1 (en) 1986-03-15

Family

ID=20445626

Family Applications (1)

Application Number Title Priority Date Filing Date
SU691327353A SU422324A1 (en) 1969-05-05 1969-05-05 Device for nondestructive inspection of dielectric materials

Country Status (6)

Country Link
CS (1) CS154744B1 (en)
DE (1) DE2021811C3 (en)
DK (1) DK127347B (en)
FR (1) FR2047332A5 (en)
GB (1) GB1275324A (en)
SU (1) SU422324A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4845421A (en) * 1986-10-10 1989-07-04 Mineral Control Instrumentation Ltd. Method and apparatus for measuring the moisture content of a substance
GB2571724B (en) 2018-03-05 2023-03-08 Pragmatic Printing Ltd Measurement apparatus

Also Published As

Publication number Publication date
CS154744B1 (en) 1974-04-30
DE2021811A1 (en) 1971-03-04
FR2047332A5 (en) 1971-03-12
GB1275324A (en) 1972-05-24
DE2021811B2 (en) 1978-02-09
DE2021811C3 (en) 1978-10-12
DK127347B (en) 1973-10-22

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