GB1060861A – Measuring system
– Google Patents
GB1060861A – Measuring system
– Google Patents
Measuring system
Info
Publication number
GB1060861A
GB1060861A
GB5527/64A
GB552764A
GB1060861A
GB 1060861 A
GB1060861 A
GB 1060861A
GB 5527/64 A
GB5527/64 A
GB 5527/64A
GB 552764 A
GB552764 A
GB 552764A
GB 1060861 A
GB1060861 A
GB 1060861A
Authority
GB
United Kingdom
Prior art keywords
output
signals
probe
motor
potentiometer
Prior art date
1963-02-18
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.)
Expired
Application number
GB5527/64A
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.)
Industrial Nucleonics Corp
Original Assignee
Industrial Nucleonics Corp
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.)
1963-02-18
Filing date
1964-02-10
Publication date
1967-03-08
1964-02-10
Application filed by Industrial Nucleonics Corp
filed
Critical
Industrial Nucleonics Corp
1967-03-08
Publication of GB1060861A
publication
Critical
patent/GB1060861A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
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
G01N27/228—Circuits therefor
G—PHYSICS
G01—MEASURING; TESTING
G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
Abstract
1,060,861. Determining physical properties. INDUSTRIAL NUCLEONICS CORPORATION. Feb. 10, 1964 [Feb. 18, 1963], No.5527/64. Heading G1N. In an apparatus for measuring a property of a dielectric material, electrical signals at different respective frequencies from two sources 10, 12 Fig. 2 are supplied to the material 11 by the electrodes 27, 29 of a probe 28, separate signals each influenced by the property to be measured are derived by filters 42, 44, from the probe and combined to produce a continuous resultant signal that is a function of the ratio of the magnitudes of the separate signals, and the output from one of the sources 12 is arranged to be controlled in response to deviations in the average value, a motor 52 which effects the control being arranged also to operate means 56 for indicating the measured value and temperature compensation being provided. The oscillator outputs are applied through input impedances 16, 18, and a feedback amplifier 20 of unity gain and not including tuned circuits, to a differential circuit including the probe, the amplifier serving as a summing amplifier and preventing one source from loading the other. The lower path of the differential circuit includes a phase inverter 24 and an adjustable capacitor 32, this latter may be equal to the test probe capacitance in the balanced condition or may be of a value determined by the relative impedances of network 26 and the phase inverter. The difference in output of the two signals S H , S L derived from unbalance in the differential circuit is used to control wipers 14H, 14L in the output of LF oscillator 12 to maintain the desired ratio, temperature compensation being provided by a potentiometer 68 driven by motor 78 in responses to changes in the temperature of a thermistor 72. The potentiometer 68 selects the proportions of signals on taps 14H, 14L, the networks being calibrated for upper and lower temperatures, and a timer 86 is provided to check calibration by substituting a standard capacitor 84 and driving LF output potentiometer wiper 98 through motor 96 at prescribed intervals. The electrodes may be in contact with the dielectric.
GB5527/64A
1963-02-18
1964-02-10
Measuring system
Expired
GB1060861A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US259116A
US3241062A
(en)
1963-02-18
1963-02-18
Computer system for two-frequency dielectric materials gauge with standardization and temperature sensor input
Publications (1)
Publication Number
Publication Date
GB1060861A
true
GB1060861A
(en)
1967-03-08
Family
ID=22983600
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB5527/64A
Expired
GB1060861A
(en)
1963-02-18
1964-02-10
Measuring system
Country Status (3)
Country
Link
US
(1)
US3241062A
(en)
DE
(1)
DE1498819C3
(en)
GB
(1)
GB1060861A
(en)
Families Citing this family (13)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3323047A
(en)
*
1963-10-21
1967-05-30
Industrial Nucleonics Corp
Two-frequency dielectric measuring system including a variable gain circuit for modifying the amplitude of at least one of two detection signals
US3323046A
(en)
*
1963-10-21
1967-05-30
Industrial Nucleonics Corp
Dielectric measuring system including phase inverting means and a summing amplifier
US3323045A
(en)
*
1963-10-21
1967-05-30
Industrial Nucleonics Corp
Dielectric measuring system including a clamp circuit for modifying one of two detection signals
US3323048A
(en)
*
1963-10-21
1967-05-30
Industrial Nucleonics Corp
Dielectric measuring system including an amplifier having a non-amplifying cathode follower circuit
US3493855A
(en)
*
1967-04-27
1970-02-03
Industrial Nucleonics Corp
Capacitive moisture gauge with signal level control using a differential capacitor in the input and feedback circuits of an amplifier
US3504280A
(en)
*
1968-04-29
1970-03-31
Industrial Nucleonics Corp
Dual frequency admittance gauge having improved frequency response unrelated to feedback response time
US3684953A
(en)
*
1970-12-21
1972-08-15
Industrial Nucleonics Corp
Single frequency moisture gauge with two-channel demodulation and feedback control of input
US3711769A
(en)
*
1971-03-09
1973-01-16
Us Army
Spurious signals and intermodulation products detection enhancement circuit
US4281286A
(en)
*
1979-11-15
1981-07-28
Surface Systems, Inc.
Apparatus and method for detecting wet and icy conditions on the surface of a pathway
US4467279A
(en)
*
1981-02-12
1984-08-21
Emerson Electric Co.
Temperature compensated resistance test board
US4580233A
(en)
*
1982-09-22
1986-04-01
Weyerhaeuser Company
Method of measuring moisture content of dielectric materials
DE102008031108A1
(en)
*
2008-07-02
2010-01-21
Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh
Capacitive sensor unit for monitoring the quality of fiber material and thus equipped machine for the production of knitwear
IT1393473B1
(en)
*
2009-03-10
2012-04-20
Microtec Srl
METHOD OF CALIBRATION FOR EQUIPMENT FOR THE DETERMINATION OF THE DEGREE OF HUMIDITY OF PRODUCTS ON THE BASIS OF CAPACITIVE MEASURES, AND DEVICE FOR THE SIMULATION OF THE DIELECTRIC PROPERTIES OF PRODUCTS, SUCH AS WOOD, TO BE USED IN THIS METHOD.
Family Cites Families (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US2718620A
(en)
*
1952-09-11
1955-09-20
Foxboro Co
Means for measurement by electrical condenser of characteristics and conditions of material
US3111845A
(en)
*
1958-10-15
1963-11-26
Simmonds Precision Products
Pick-off transformer for measuring dielectric material
US3169220A
(en)
*
1959-12-21
1965-02-09
F L Moseley Co
Signal ratio measuring system providing constant servo loop gain
1963
1963-02-18
US
US259116A
patent/US3241062A/en
not_active
Expired – Lifetime
1964
1964-01-17
DE
DE1498819A
patent/DE1498819C3/en
not_active
Expired
1964-02-10
GB
GB5527/64A
patent/GB1060861A/en
not_active
Expired
Also Published As
Publication number
Publication date
DE1498819C3
(en)
1975-05-22
DE1498819B2
(en)
1974-09-26
US3241062A
(en)
1966-03-15
DE1498819A1
(en)
1969-04-03
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