JPS57200842A - Cereals moisture measuring device equipped with temperature compensating function for oscillating circuit - Google Patents

Cereals moisture measuring device equipped with temperature compensating function for oscillating circuit

Info

Publication number
JPS57200842A
JPS57200842A JP8650381A JP8650381A JPS57200842A JP S57200842 A JPS57200842 A JP S57200842A JP 8650381 A JP8650381 A JP 8650381A JP 8650381 A JP8650381 A JP 8650381A JP S57200842 A JPS57200842 A JP S57200842A
Authority
JP
Japan
Prior art keywords
circuit
cereals
voltage
impedance
moisture
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
JP8650381A
Other languages
Japanese (ja)
Other versions
JPS6156460B2 (en
Inventor
Hideyasu Yuki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KETSUTO KAGAKU KENKYUSHO KK
Kett Electric Laboratory
Original Assignee
KETSUTO KAGAKU KENKYUSHO KK
Kett Electric Laboratory
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 KETSUTO KAGAKU KENKYUSHO KK, Kett Electric Laboratory filed Critical KETSUTO KAGAKU KENKYUSHO KK
Priority to JP8650381A priority Critical patent/JPS57200842A/en
Publication of JPS57200842A publication Critical patent/JPS57200842A/en
Publication of JPS6156460B2 publication Critical patent/JPS6156460B2/ja
Granted legal-status Critical Current

Links

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
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/045—Circuits
    • G01N27/046—Circuits provided with temperature compensation

Abstract

PURPOSE:To compensate a temperature drift, by a method wherein an output of a high- frequency oscillating circuit, supplied to a circuit, which performs a moisture measurement of cereals to be measured, and a reference impedance circuit, is controlled so that the output of the reference impedance circuit is brought to a given level. CONSTITUTION:Cereals to be measured are placed between two electrodes 1, and a moisture circuit 3 generates a DC voltage VDC corresponding to a moisture content rate through application of a high-frequency signal to cereals. A reference impedance circuit 5 has an impedance corresponding to an impedance circuit 5 has a impedance corresponding to an impedance value obtained when the cereals to be measured is brought to a given temperature and moisture content rate, and detecting circuit 7 generates a DC voltage VD corresponding to the moisture content rate of the circuit 5. The voltage VD is compared (9) with a reference voltage Vref of a reference power source 13, and a detecting voltage Vc, bringing the voltage VD to a given value. A high- frequency circuit 15 is regulated by the voltage Vc, the temperature drift of the circuit 15 itself is compensated. Thus, a normally constant high-frequency voltage is applied to cereals placed between the electrodes 1, and this permits the reliable measurement of the moisture of the cereals.
JP8650381A 1981-06-05 1981-06-05 Cereals moisture measuring device equipped with temperature compensating function for oscillating circuit Granted JPS57200842A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8650381A JPS57200842A (en) 1981-06-05 1981-06-05 Cereals moisture measuring device equipped with temperature compensating function for oscillating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8650381A JPS57200842A (en) 1981-06-05 1981-06-05 Cereals moisture measuring device equipped with temperature compensating function for oscillating circuit

Publications (2)

Publication Number Publication Date
JPS57200842A true JPS57200842A (en) 1982-12-09
JPS6156460B2 JPS6156460B2 (en) 1986-12-02

Family

ID=13888777

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8650381A Granted JPS57200842A (en) 1981-06-05 1981-06-05 Cereals moisture measuring device equipped with temperature compensating function for oscillating circuit

Country Status (1)

Country Link
JP (1) JPS57200842A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100289335B1 (en) * 1998-06-02 2001-05-02 최병준 Nondestructive measuring apparatus for moisture content using phase difference

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63127568U (en) * 1986-09-03 1988-08-22

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100289335B1 (en) * 1998-06-02 2001-05-02 최병준 Nondestructive measuring apparatus for moisture content using phase difference

Also Published As

Publication number Publication date
JPS6156460B2 (en) 1986-12-02

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