SU132423A1 - Moisture measuring device - Google Patents
Moisture measuring deviceInfo
- Publication number
- SU132423A1 SU132423A1 SU655528A SU655528A SU132423A1 SU 132423 A1 SU132423 A1 SU 132423A1 SU 655528 A SU655528 A SU 655528A SU 655528 A SU655528 A SU 655528A SU 132423 A1 SU132423 A1 SU 132423A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- measuring device
- moisture measuring
- bridge circuit
- measuring
- sensor
- Prior art date
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Description
Известны устройства дл определени влажности различных материалов по величипе сопротивлени переменному току, выполненные и виде питаемой переменным током мостовой схемы с присоедине)иым к ней датчиком, между адехтродами которого помещают испытуемый материал, и стрелочного измерительного прибора, присоединенного к датчику. Недостаток известных устройств заключаетс в том, что они не универсальны, так как не позвол ют проводить измерени ими степени созревани сельскохоз йственных к льтур, степени их повреждени , концентрании солевых растворов, иггенснвности фотосинтеза иDevices are known for determining the humidity of various materials by the magnitude of the resistance to alternating current, made both by the type of an alternating current fed bridge circuit with an attached sensor to it, between which addetrodes the test material is placed, and a needle measuring instrument connected to the sensor. A disadvantage of the known devices is that they are not universal, since they do not allow them to measure the degree of maturation of agricultural crops, the degree of their damage, the concentration of salt solutions, the iggeness of photosynthesis and
КИСЛОТНОСТИ.ACIDITY.
В онисываемо.м изобретении этот недостаток странен тем, что к мостовой схеме его через переключатель присоединен второй датчик сопротивлени ДЛЯ испытуемых материалов, измерительный прибо;.) присоединен к датчику через уси..-1ь, а н цень измерительного прибора через переключатели и выпр мители последовательно присоединены два датчика сопротивлени , нричем дл питани мостовой схемы применен генератор высокой частоты.In the invention of this invention, this drawback is strange in that a second resistance sensor FOR test materials, a measuring device; is connected to the bridge circuit ;.) is connected to the sensor via usi ..- 1b, and at the price of the measuring device through switches and rectifiers Two resistance sensors are connected in series, and a high-frequency generator is used to power the bridge circuit.
На чертеже показана принципиальна схема устройства.The drawing shows a schematic diagram of the device.
Генератор высокой частоты / через трансформатор 2 подключен к нз.мерительной мостовой схеме 3, на выходе которой включен двухкаскадный усилитель 4. Через трансформатор 5 с анодной цепи усилител 4 через выар мите, 6 ц. 7 подключен измерительный прибор 8.The high-frequency generator / through transformer 2 is connected to the measuring bridge circuit 3, the output of which includes a two-stage amplifier 4. Through a transformer 5 from the anode circuit of amplifier 4 through the output, 6 c. 7 is connected to the measuring device 8.
Изменение диапазона измерений и плавное изменение характеристики .мостовой схемы осуихествл етс сопротив.аени мн ,9-17 включаемыми переключателем 18,A change in the measuring range and a smooth change in the characteristic of the bridge circuit is the characteristic of resistance, mn, 9-17 switched on by switch 18,
Пр измерении активного и емкостного сопротивлени ло мостовой схе.ме датчик сопротивлени подключаетс через гнезда 19 и 20. НерекЛЕочателе .м 21 параллельно датчику включаютс сопротивление 22, уменьнтаюшее нелинейпость шкалы прибора Л. i ко; денсаторы 25, 21 и 25.When measuring the active and capacitive impedances of a bridge circuit. The impedance sensor is connected through slots 19 and 20. The relay 22 connects impedance 22 in parallel with the transducer, reducing the nonlinearity of the instrument scale L. i co; densators 25, 21 and 25.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU655528A SU132423A1 (en) | 1960-02-22 | 1960-02-22 | Moisture measuring device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU655528A SU132423A1 (en) | 1960-02-22 | 1960-02-22 | Moisture measuring device |
Publications (1)
Publication Number | Publication Date |
---|---|
SU132423A1 true SU132423A1 (en) | 1960-11-30 |
Family
ID=48403458
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU655528A SU132423A1 (en) | 1960-02-22 | 1960-02-22 | Moisture measuring device |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU132423A1 (en) |
-
1960
- 1960-02-22 SU SU655528A patent/SU132423A1/en active
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EA199700453A1 (en) | DEVICE FOR INDICATION OF CHANGES IN THE RESISTANCE OF THE LIVE BODY, FEEDBACK AND CONTROL SCHEME FOR USE IN THE DEVICE, METHOD OF SUPPORTING A CONSTANT AMPLITUDE CHARACTERISTICS | |
US3784908A (en) | Electrical conductivity measurement method and apparatus | |
SU132423A1 (en) | Moisture measuring device | |
FR2419057A1 (en) | APPARATUS FOR MEASURING ELECTRICAL RESISTANCE AT ACUPUNCTURE POINTS OF HUMANS OR ANIMALS AND METHOD FOR MEASURING RESISTANCE BY THIS APPARATUS FOR DISTINGUISHING BETWEEN SUBSTANCES AND DETERMINING IF THEY ARE SUITABLE AS FOODS, COSMETICS, CLOTHING, ETC. | |
US4103231A (en) | Electrometric apparatus | |
GB663946A (en) | Improvements in level measuring apparatus | |
GB585140A (en) | Improvements relating to the detection of vibrations | |
JPS56633A (en) | Pressure/resistance transducer | |
SU600699A1 (en) | Schmitt trigger | |
SU833197A1 (en) | Device for locating acupuncture points | |
SU133171A1 (en) | Device for measuring intraocular pressure | |
GB1070081A (en) | Improvements in or relating to apparatus for the direct measurement of capacitance | |
SU198504A1 (en) | COMMON ILMf№S2 '' '' ^ ЬЬЛИО - ^^ adpribor for | |
JP2553945B2 (en) | Conductivity and resistivity measuring device | |
SU654918A1 (en) | Varying magnetic field measuring device | |
JPS54156580A (en) | Temperature measuring apparatus | |
SU578057A1 (en) | Apparatus for locating regions of abnormal skin impedance | |
SU387517A1 (en) | LOGARIFM TRANSFER RELATING AMNLITUDE PAIR PULSED DURING A TIME INTERVAL | |
SU858770A1 (en) | Digital pulse frequency meter | |
SU703766A1 (en) | Device for measuring the amplitude of single pulses | |
SU1157477A1 (en) | Digital meter of harmonic factor | |
SU105872A1 (en) | Device for measuring sweating | |
SU489202A1 (en) | Device for measuring continuously variable physical quantities | |
SU658573A1 (en) | Logarithmic dc amplifier | |
SU140248A1 (en) | Device for measuring the moisture content of bulk materials |