SU615403A1

SU615403A1 - Moisture-content meter

Info

Publication number: SU615403A1
Application number: SU762359035A
Authority: SU
Inventors: Владимир Константинович Савицкий; Василий Иванович Грицай; Владимир Антонович Иватив
Original assignee: Savitskij Vladimir K; Gritsaj Vasilij; Ivativ Vladimir A
Priority date: 1976-05-12
Filing date: 1976-05-12
Publication date: 1978-07-15

Description

Изобретение относи-гс к области измерительной техники, в частиост к измерению влажности газа термоакустическим способе.The invention relates to the field of measurement technology, in part to the measurement of gas humidity by a thermo-acoustic method.

.Известны влагомеры, построенные по принципу оптико-акустических газоанализаторов , в частаоста инфракрасный гигрометр , состо щий из измерительной камеры соединенной выходом с насосом, а входом с каналом забора исследуемого газа или осушенного в адсорбере. Измерительна камера помещена в оптический кавал, содержащий лампу накадавани , уравновешивающий и поз троечаыА }ашщ модул тор . Детектор иэлуче.ни соединен с фазочуас-пвитэлькым усилителем, выход которого св зан с уравновешивающим клином посредством реверсивного исполнительнсх о электродвигател . Клин св зан через электрический преобразователь с авт латическим потешшометром, проградуированном в единицах абсолютной влажности ij.. Hydrometers are known, built on the principle of optoacoustic gas analyzers, in particular, an infrared hygrometer consisting of a measuring chamber connected to the output of the pump, and an input to the intake channel of the test gas or dried in the adsorber. The measuring chamber is placed in an optical cavity, which contains a nakadavani lamp, a balancing posture and three-sided} modulator. The detector is connected to a phasoi-dual amplifier, the output of which is connected to the balancing wedge by means of a reversing motor. The wedge is connected through an electric converter with an automatic comfort meter, scaled in units of absolute humidity ij.

Недостатком данного устрс ства вл етс сложность кш1струкции.The disadvantage of this device is the complexity of the structure.

Наиболее близким по своей технической сущности к предлагаемому изобретению вл етс влагомер, содержащий стаоилизатор расхода газа, рабочую и сравнительную камеры с источниками излучени , генератор переменного тока и дифференциальный микрофон 2J.The closest in technical essence of the present invention is a moisture meter comprising a gas flow rate stabilizer, a working and comparative chamber with radiation sources, an alternator and a 2J differential microphone.

Недостатком такого влагомера вл ерс вли ние на результаты измерений таких параметров измер емого газа, как давление и температура, а также содержа1ше в нем примесей других газов.The disadvantage of such a moisture meter is the effect on the measurement results of such parameters of the measured gas as pressure and temperature, as well as the content of impurities of other gases in it.

Целью изобретени вл етс повышение точности измерени .The aim of the invention is to improve the measurement accuracy.

Claims

The goal is achieved by the fact that a moisture meter containing a gas flow stabilizer, {a walking and a comparative chamber with radiation sources, an alternator and a differential microphone, is additionally equipped with an adsorber, tracking system, the comparative chamber is made flowing, and the adsorber inlet is connected to a gas flow stabilizer , the output is connected to the input of the comparative camera, and the radiation source of comparative Y1 of the camera is connected in series with a variable resistor controlled by a follow-up one (L. The drawing is moisture meter. The moisture meter contains a flow stabilizer 1, to which two channels A- 0 B are connected. Channel A contains a working chamber 2, as B - adorber 3 and a comparative chamber 4. Radiation sources 5 and 6 are connected to the alternator 7, In addition, a differential microphone 8, which is connected to cameras 2 and 4, is connected to a tracking device 9, which is mechanically connected to a variable resistor 1O in the power supply ueira of the radiation source 6, the moisture meter also contains a milliammeter 11. The moisture meter works as follows. The analyzed gas with constant flow passes not channels A and B, which contain, respectively, working 2 and comparative 4 chambers 1. Dry gas dried in the adsorber 3 is supplied to the comparative chamber. Radiation sources 5 and 6 emit heat energy with a frequency that sets alternating current generator 7: As a result of the dynamic testing of the process, we determine (heat capacity, heat capacity and gas density), acoustic oscillations occur, which are perceived as differential. 8. Amplitude of acoustic oscillations in The chamber depends on the humidity of the pelvic basin at a constant value of the current rate of the source of radiation, in contrast, only on the magnitude of the current of the source of radiation. The current of the source of radiation of the working chamber is unchanged. current of the radiation source of the comparative chamber until the amplitudes of the acoustic pressure of the working and comparative chambers become equal. The position of the slider of the variable resistor or the difference in the currents of the radiation sources determines the value of the humidity of the measured gas. Thus, in the proposed moisture meter, the implementation of a comparative flow chamber connected by an inlet to an adsorber eliminates the effect of temperature, pressure and impurities of other gases on the measurement results, since (they will compensate each other, and the change in the current of the radiation source from the comparative camera will allow you to compare acoustic oscillations in the working and comparative chambers automatically. Formula of the invention: A moisture meter containing a stabilizer; a gas flow rate, a working and a comparative chamber with sources from Student, alternator and differential microphone, characterized in that, in order to improve measurement accuracy, it is equipped with an adsorber, a tracking system, the comparative chamber is flow-through, the adsorber input connected to the gas flow stabilizer, the output to the reference chamber input, and Comparison of radiation is connected in series with a variable driver controlled by a follow-up system. Sources of information taken into account during the examination: 1.Wood R. Infrared hygrometer and its application to complex m humidity measurement tasks. Humidity, L., Gidrometevasudizdat, 1967, t 1.

2.Berliner M.A. Moisture Measurement, M., Energie, 1973, p. 316.