SU669276A1

SU669276A1 - Device for analysis of gaseous mixtures

Info

Publication number: SU669276A1
Application number: SU742054889A
Authority: SU
Inventors: Геннадий Львович Розинов; Сергей Викторович Скрупский
Original assignee: Предприятие П/Я Р-6900
Priority date: 1974-08-23
Filing date: 1974-08-23
Publication date: 1979-06-25

Description

(54) УСТРОЙСТВО ДЛЯ АНАЛИЗА ГАЗОВЫХ СМЕСЕЙ(54) DEVICE FOR ANALYSIS OF GAS MIXTURES

II

Изобрегение отнсх:итс к области аналитического приборосгроени и может бы применено, в частности, дл контрол тенологических газов и жидкостей, преимущественно в химической и нефтехимической , а также в других отрасл х промышленности .The image is relative to its field of analytical instrumentation and could be applied, in particular, to control tenological gases and liquids, mainly in the chemical and petrochemical industry, as well as in other sectors of the industry.

Известны газоанализаторы, использук шие зависимость теплопроводности газовой смеси от состава l. Их недостатком вл етс отсутствие компенсации погрешиостей, обусловленных изменением концентрации неизмер емых компонентов в анализируемой газовой смеси.Gas analyzers are known that use the dependence of the thermal conductivity of a gas mixture on the composition l. Their disadvantage is the lack of compensation for imperfections caused by a change in the concentration of unmeasurable components in the analyzed gas mixture.

Известен газоанализатор, содержащий измерительный мост с рабочими и сра&нительными чувствительными элементами , дсжолнительный мост со сравнительным элементом и посто нными резисторами , устройство с автоматически регулируемым №1ходным напр жением и стабилизированный источник питани 2.A gas analyzer is known, which contains a measuring bridge with working and average sensitive elements, an additional bridge with a comparative element and constant resistors, a device with automatically controlled voltage running voltage and a stabilized power source 2.

Однако этот газоанализатор не позвол ет добитьс то,чности измерени дл However, this gas analyzer does not allow to achieve measurement accuracy for

случа , кс гда увеличение теплсдаровоанооти анализируемой газовой смеси при лзменении кониентраини неизмер емых компонентов приводит к увеличению выходного сигнала измерительного моста.In the event that an increase in the heating temperature of the analyzed gas mixture when the contientry of the immeasurable components is changed, the output signal of the measuring bridge increases.

Целью изобр етениа вл етс повышение точности измерени путем уменьшени вли ни изменени теплопровотаости анализируемой газовой смесн при изменении концентр ацив неизмер емых компонентов .The aim of the invention is to improve the measurement accuracy by reducing the effect of changes in the heat conduction of the analyzed gas mixture when the concentration of the non-measurable components changes.

Это достигаетс тем, что измерительный мост включен последовательно по питанию от стабилиэироваииого источника с дополнительным мостом, измерительна диагональ которого подключена к регулирующему- входу устройства с автоматически регулируемым выходным напр жением , а шлход последнего подключен к диагонали питани дополнительного моста .This is achieved by the fact that the measuring bridge is connected in series with power from a stabilized source with an additional bridge, the measuring diagonal of which is connected to the regulating input of the device with an automatically controlled output voltage, and the schlokhod of the latter is connected to the diagonal power supply of the additional bridge.

Claims

The drawing shows a diagram of the proposed device. (c) (1) and 2 and the other resistors 3 and 4 form the basic measuring arc, with one of the 4yRctBHTenbHbix elements 2 being washed by the working gas, and the other 1 - by the comparative one. The additional bridge is connected in series with the main measuring bridge containing three constant resistors 5, 6 and 7 and an additional sensing element 8, washed by a comparative gas. The measuring diagonal of the additional bridge is connected to the input of voltage regulator 9, M; 1 input of which is connected to the power supply diagonal The power supply source of the gas analyzer is voltage regulator 10. The instrument 11 is connected to the measuring diagonal of the main bridge. When the concentration of non-measurable components in the analyzed gas mixture changes, the unbalance appears in both measuring bridges. an additional measuring bridge is applied to the input of a voltage regulator, which changes its output voltage applied to the diagonal of the power supply of the additional bridge so as to bring the voltage back to Since the two measuring bridges are connected in series and are powered by a voltage regulator, the supply voltage of the main measuring bridge is changed to bring the output signal of this bridge, measured by the indicating device 11, to its original state. 1 Testing has shown that, by reducing the climax caused by destabilizing factors, the accuracy of the analysis is increased. Claims An apparatus for analyzing gas mixtures, comprising a measuring bridge with working and comparative sensitive elements, an additional bridge with a comparative element and constant resistors, a device with automatically controlled output voltage, and a stabilized power source, in order to increase the accuracy measurement by reducing the effect of changes in the thermal conductivity of the analyzed gas mixture upon changing the concentration of non-measurable components, ost is serially nutrition from a stabilized power source with an additional bridge, measuring the diagonal of which is connected to the control entry device automatically regulated output voltage, and the output of this unit is connected to the additional power bridge diagonal. Sources of information taken into account in the examination 1. Pavlenko V, A. Gas analyzers. M.-L., Mechanical Engineering, 1065, p. 35-45.

2. For the number 1948439 / 26-25, cl. G 01 N 27/18, 07/25/73, on which the decision to issue an author's certificate was made. (rtu-iii.