SU521509A1 - Device for discrete humidity measurements - Google Patents

Description

This method is used in engineering, in particular, devices for measuring humidity and may be used in chemical engineering equipment for chemical production to control chemically irreducible materials.

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It is known a device that is suitable for measuring moisture of wide-range spreads of wire with a range of HMs with a helix inhomogeneity 1 This device is 1, the relationship between the content is thermal and ampheral., Use a bridge for this current and register this area. the disadvantage of a current-to-current, 4tQ impediment to a predicament from a tetanus nerve rupture is carried out on a decent current in any case in the communication path of the primary phytogenomer with a zooscaler 0 ° unit of air hiccup in ssfm FA & Possible Potential: Hyperefficial losses Therefore, the CBSK-JS path does not need to be a badge of it.

Known jCTpssiiDTBO for non-discontinuous © and its aas HOCTHl2, Oyo consists on

eKteesCTHiDTO primary generator, electrodes: which are included in the circuit of the working high-frequency generator and onoi high-frequency generator connected to the inputs of a mixer connected via low frequency to the constant voltage K & s as well as the registration unit This device is based on use; 5 & ayme (yy capacity of the primary transformed-eon zionnennogo controlled mate pEajiOMj from the humidity of the spring.

The above {"device is inherent in pstfx yvdeyugatkov. Firstly, it measures the high level sensor of materials with high conductivity (R 1 isOMj where R is commM

The sensor with the material is practically not possible because the breakdown of oscillations of the working generator is observed. Secondly, when monitoring chemical media of multiple sources, significant errors creep into the measurement of the Bavian and variable active losses of the amp & paanas as observed

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R and C

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connection between

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material in the sensor).

The above disadvantages are eliminated with in the proposed device for discrete measurements of the Genericity,

To measure the moisture content of chemical inhomogeneous materials with high conductivity, the proposed device is equipped with a thermostat connected to a voltage divider, the output of which is connected to a series of serially connected control relays, a transformer included in a network, a limit switch to a thermal section located in a teg-capacitive tag sensor Such a device allows not only to transmit useful information to a considerable distance without causing interference in the form of interference and electric | losses in the transmission path, but measuring the moisture content of chemically non-uniform materials of significant conductivity with high accuracy.

The drawing shows a diagram of the proposed device.

The device consists of a group of electro-DON 1 (flat capacitor) located on a dielectric with a high temperature coefficient of capacitance (TKE) j 2 ,. heated, thermoelement 3, generally representing a capacitive-thermal sensor which is included in the circuit of the generator 4 electrical oscillations. Generator | 4 under the keys to the input of the frequency converter 5 to the DC voltage, the load of which is the primary divider of the blockers 6; The output of this divider is led to one of the inputs of the block 7 of the recorder; The second divider of the block 6 is connected to the stabilizer of the voltage source 8 and its output is connected to the second input of the unit 7, the Primary measuring-transduction path is encompassed by a link consisting of the thermoregulation device 9, the executive relay 10, the transformer 11 and the limit switch 12, the First and the second the dividers of the block 6 are driven by the input circuits of the thermostatic angle, unit 9, the output circuit of which includes the executive relay 10, the normally closed contact of the executive relay 10, the secondary winding of the transformer 11 and the terminal 12 together with the thermoelement 3 are sensor circuit.

The operation of the device is as follows. The sensor is included in the contour of the general °

torus 4. The oscillation frequency of the generator is proportional to the sensor capacitance}, which in turn is a function of the temperature of the dielectric layer with a high TKE 2, The signal, the frequency corresponding to a certain sensor temperature, enters the input of the converter 5, where it converts into voltage direct current, applied to the divider R., R block divide

Lei 6, C divider R .., R

the wife is removed and fed to one of the dows of the recording unit 7. The second input of the recording unit is energized from the divider from

d.

C t is powered by a stabilized power source 8j. Thus, the zap & b block registers the difference in voltage, c &

R

mated with parts K., S

and Rg,

four

J, g

In the outgoing state, in the period preceding the measurement period, the recording unit records the zero difference in the flow rates. This is done accordingly; By setting the variable resistance R and stabilizing the output voltage of the converter 5, the latter is carried out with the help of a thermostatic switch 9 and a circuit consisting of directly connected actuator Yue of the secondary winding of the transformer 11 and the limit switch 12.

This chain of elements 9,10 11,12 | and 3, o; -CBat the entire primary measuring and conversion path Ij 2,4,5 ,. To the inputs of the thermostatic device the device is supplied with voltage O removed from the variable resistance

divider block 6, and the comparison voltage

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from the output of the converter 5. In the case of

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ter MO-

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regulating device including caching relay 10, normally Closed OHN tact of which breaks; sensor warm circuit The temperature of the layer of ferroelectric ceramics decreases as the capacitance decreases accordingly causing a decrease in the output value; converter 3. Thus, the tempera of the sensor tour; stabilized and, consequently, the output value of the converter 6 stabilizes. Then the heated sensor is placed on the material to be monitored. At that moment, the limit switch 12 breaks the heating circuit. The sensor is ohazh-given, its capacity increases, the frequency of the generator 4 changes, and therefore the output value of the converter 5 also changes. Therefore, it is removed from the dividers 1. The voltage difference between R 3 R and R 2 R also changes fixed by the recording unit 7. It is known that with an increase in the moisture content of the tropied material, the heat conduction of its material also increases, and therefore the sensor cools by a large amount over a selected period of time. This causes the write block to register a larger value. After the measurement, the sensor is removed from the monitored material, the limit switch 12 is closed on the heating circuit, the temperature of the sensor is reset, and the device is prepared for the next measurement. The economic efficiency of the device proposed is that it is possible to measure. The Research Institute of Humidity of Chemically Inhomogeneous Materials of Practical Any Conductivity with a Device as Simple as the Principle of Operation of TS4 and for Its Implementation. In this case, the use of the frequency method in the primary of the I measuring-conversion path allows the signal from the sensor to the measuring unit to be transmitted for a considerable distance. Formula of the Invention A device for discrete measurements of power, comprising a capacitive-thermal sensor connected in parallel to a generator circuit connected to the input of a frequency to voltage converter, and a recording unit connected through a voltage divider to the output of a 6-ton converter without the purpose of measuring the humidity of chemically inhomogeneous materials with high conductivity, it is equipped with a thermostatic device 8m connected to a voltage divider, the output of which is connected to a circuit in series of the operating relay, transformer, included in the network, the end of the thermoelement switch, located in the body of the capacitive-thermal date Information sources, which are available for examination during examination: 1, US Patent NP 2718141, cl, 73-75,:: 1955, 2, Krichevsky E, S, Highly accurate counter humidity with the enrichment of useful minerals, M, Nedra, 1972, p. 149 (prototype).

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