SU775674A1

SU775674A1 - Medium composition determining method

Info

Publication number: SU775674A1
Application number: SU782680772A
Authority: SU
Inventors: Сергей Константинович Куроедов; Александр Иванович Мартяшин
Original assignee: Пензенский Политехнический Институт
Priority date: 1978-10-31
Filing date: 1978-10-31
Publication date: 1980-10-30

Description

1one

Изобретение относитс к области анализа материалов с помощью тепловых средств и может бы1ь использовано дл исследовани различных гетерогенных средств: суспензий, азрозолей , компоудидов, композиционных материалов и т.п.The invention relates to the field of analysis of materials using thermal means and can be used to study various heterogeneous means: suspensions, azrozols, compousides, composite materials, and the like.

Известен способ определени состава, состо щий в измерении плотности среды, на основании чего суд т о соотношении в ней составл ющих , различающихс по плотности. 1. Этот способ не приемлем в случае, если ощутимое различие плотностей составл ющих отсутствует .There is a known method for determining the composition, which consists in measuring the density of a medium, on the basis of which it is judged about the ratio of components differing in density in it. 1. This method is not acceptable if there is no noticeable difference in the densities of the components.

Известен также способ определени состава дисперсных сред, который заключаетс в изме .рении удельного электросопротивлени 2. Недостатком способа вл етс вли ние на результаты измерени электросопротивлени границ , неприменимость его дл анализа диэлектрических сред.There is also known a method for determining the composition of dispersed media, which consists in measuring the electrical resistivity 2. The disadvantage of this method is the influence on the results of measurements of the electrical resistivity of the boundaries, its inapplicability for the analysis of dielectric media.

Наиболее близким к изобретению по технической сущности вл етс способ определени состава, состо щий в нагреве пробы и регисг рации изменени ее температуры 3,The closest to the invention in its technical nature is a method for determining the composition, consisting in heating a sample and registering a change in its temperature 3,

Недостатком способа вл етс ограниченна точность и ограьшченность класса испытуемых сред.The disadvantage of the method is the limited accuracy and boundedness of the class of test media.

Целью изобретени вл етс устранение указанного недостатка, то есть повыщение точности и расщирение класса испытуемых сред.The aim of the invention is to eliminate this drawback, i.e., increase accuracy and enhance the class of test media.

Указанна цель достигаетс тем, что в способе определени состава, состо щем в нагреве пробы и регистрации, изменени ее температуры, нагрев осуществл ют знергетическим воздей«С ствием, обладающим избирательным воздействием по отнощению к анализируемым составл ющим .This goal is achieved by the fact that in the method of determining the composition, consisting in heating the sample and registering its temperature changes, the heating is carried out by an energy effect having a selective effect with respect to the components being analyzed.

Энергетическое воздействие в рамках изобретени может иметь как злектромагнитную природу (злектрюмагнитное поле, гамма-излучение , свет, злектрический ток и т.д.), так и механическую (удар, ультразвуковое поле и т.д.)The energy impact within the scope of the invention may be of both an electromagnetic nature (electrofusion field, gamma radiation, light, electric current, etc.), and mechanical (impact, ultrasonic field, etc.)

Claims

In the case of the selectivity of the absorption of the energy impact of the analyzed components, the total absorption at the same exposure is a function of the composition. The energy absorbed by the sample being analyzed goes to its heat. In this way. 3 determination of the change in the temperature of the sample as a result of exposure leads to the determination of the composition of the analyzed medium. In practical implementation, it is convenient to make the exposure time small compared to the time of energy dissipation from the sample into the surrounding space. Temperature measurements in this case are reduced to recording the temperature change of the ape after exposure. Observing the process of temperature equalization over the volume of a micro-inhomogeneous medium, one can additionally judge the characteristic sizes of the fractions of the analyzed components. The advantage of the method is that it is possible to control the change in the composition not only from sample to sample, but also in the process flow, in different parts of the product, etc. Thus, the method can be used not only in laboratory tests, but also in process control. 4 The invention method for determining the composition of media, which consists in heating the sample and registering a change in its temperature, characterized in that, in order to improve the accuracy and dilution of the class of test media, the heating is carried out with an energy effect having a selectivity with respect to the components being analyzed. Sources of information taken into account in the examination 1. Methods of testing, monitoring and research of building materials, Pod obsch. ed. A.T. Tumanova. M., Mechanical Engineering, vol. 3, 1973, p. 69

2. USSR author's certificate number 461340, cl. G 01 N 27/02 13.08.73.

3. USSR author's certificate number 162982, cl. G 01 N 25/20, 21.02.63 (prototype). „