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SU556398A1 - Hygrometer - Google Patents

Hygrometer

Info

Publication number
SU556398A1
SU556398A1 SU1935977A SU1935977A SU556398A1 SU 556398 A1 SU556398 A1 SU 556398A1 SU 1935977 A SU1935977 A SU 1935977A SU 1935977 A SU1935977 A SU 1935977A SU 556398 A1 SU556398 A1 SU 556398A1
Authority
SU
USSR - Soviet Union
Prior art keywords
hygrometer
mixing circuit
generators
generator
piezoelectric sensor
Prior art date
Application number
SU1935977A
Other languages
Russian (ru)
Inventor
Мюллер Иоханнес
Original Assignee
Феб Комбинат Люфт Унд Кельтехник (Инопредприятие)
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 Феб Комбинат Люфт Унд Кельтехник (Инопредприятие) filed Critical Феб Комбинат Люфт Унд Кельтехник (Инопредприятие)
Application granted granted Critical
Publication of SU556398A1 publication Critical patent/SU556398A1/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/02—Analysing fluids
    • G01N29/036—Analysing fluids by measuring frequency or resonance of acoustic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/025—Change of phase or condition
    • G01N2291/0256—Adsorption, desorption, surface mass change, e.g. on biosensors

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Description

ни  частоты и регистрирующий прибор, отличающийс  тем, что, с целью расширени  диапазона измерений нри неизменной разрешающей способности, он снабл-сен пьезоэлектрическим датчиком с гигроскопической поверхностью , двум  генераторами, дополнительной смесительной схемой, полосовым фильтром и разделительным усилителем, при4eiM пьезоэлектрический датчик соединен с первым генератором, а воздушный конденсатор- С вторым генератором, выходы обоих генераторов подключены к дополнительной смесительной схеме, выход которогой через полосовой фильтр и разделительный усилитель подсоединен к основной смесительной схеме.No frequency and recording device, characterized in that, in order to expand the measurement range at a constant resolution, it was equipped with a piezoelectric sensor with a hygroscopic surface, two generators, an additional mixing circuit, a band-pass filter and a separating amplifier, with a 4eiM piezoelectric sensor connected to the first the generator, and the air condenser, With the second generator, the outputs of both generators are connected to an additional mixing circuit, the output of which is through The filter and isolating amplifier is connected to the main mixing circuit.

SU1935977A 1972-06-28 1973-06-27 Hygrometer SU556398A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD16400972A DD97750A1 (en) 1972-06-28 1972-06-28

Publications (1)

Publication Number Publication Date
SU556398A1 true SU556398A1 (en) 1977-04-30

Family

ID=5487216

Family Applications (1)

Application Number Title Priority Date Filing Date
SU1935977A SU556398A1 (en) 1972-06-28 1973-06-27 Hygrometer

Country Status (5)

Country Link
CH (1) CH566552A5 (en)
DD (1) DD97750A1 (en)
DE (1) DE2328919A1 (en)
GB (1) GB1379716A (en)
SU (1) SU556398A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0484569A1 (en) * 1990-11-06 1992-05-13 Asea Brown Boveri Ag Apparatus for measuring sulphur hexafluoride decomposition products

Also Published As

Publication number Publication date
GB1379716A (en) 1975-01-08
CH566552A5 (en) 1975-09-15
DE2328919A1 (en) 1974-01-10
DD97750A1 (en) 1973-05-14

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