SU1420484A1 - Apparatus for investigating phase transition processes - Google Patents

Abstract

The invention relates to the field of research, monitoring and analysis of material JET using thermal means, namely, devices for studying crystallization processes or deposition from the gas phase in the presence of temperature drops. The purpose of the invention is to increase the accuracy of measurements, reducing labor intensity and improving the quality of the products. Phase transformations are analyzed by changing or changing the optical density of the test object 18 placed in the heat node 17. The device contains a core i5

Description

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The invention relates to a technique for the study, control and analysis of materials using thermal means, namely, devices for studying the processes of crystallization or precipitation From gas fs in the presence of temperature drops,

The purpose of the invention is to increase the accuracy of the measured; to the parameters of the dimensional measurements, the reduction of labor costs and the improvement of the quality obtained in the processes with phase transformations of production.

Fig. 1 shows a diagram of devices for studying phase transformation processes — and placing additional photosensors; by 4 designs; chi and photovoltaic power circuit, 1

A device for studying phase transformation processes comprises a housing 15 with optical systems 2 and 3 placed therein, guiding

4 and 5 with carriages 6 and 7. Photo sensors - km 8 and 9, placed respectively on carriages 6 and 7, 10 and 11 carriages 6 and 7. Photo sensors 8 and 9 are connected to the drive 1 4 10 and 11 through the first inputs of control circuits 12 and 13 “Optical systems 2 and 3 are installed using spherical hinges 14, and 1 {e; two additional photo sensors are placed with them (Fig .1 only one of them is shown - a block of photosensors 15 with its own optical systems 16), a device for investigating phase transformation processes Taioice tagging unit 17 for initiating phase transformations in the test object 13 (for example, as a node va ku: / mn furnace resistance With a quartz crucible) with sequentially connected drtoKots 19. iktakk, 6 and 7 aerials, as well as additional photosensors 15 with optical systems 16 and a multichannel synchronizer 22. 1 zp. f-ly, 4 ill.

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My control device 20 and sensor 21, as well as the multichannel synchronizer 22. In addition, the device contains a sensor 23 for the relative movement of carriages 6 and 7 connected to the first input of a recording device 24, Hbtfi, to the second input of which a synchronizer 22 is connected.

The photoelectric ruler (FIG. 3) consists of several photosensors, in this case four photosensors 25-28 included in the bridge circuit, in one of which diagonals the power source 29 is turned on, and the output terminals 30 and 31 of the second diagonal are intended to be connected to the input of the corresponding channel synchronizer.

A device for studying phase transformation processes works as follows.

When the heating is turned on, the heating unit 17 and the object under study 18 use the setting device 21 to set the heating mode for the operation control system 20 of the power supply unit 19. Upon reaching the range of phase transformations from one of the photosensors 15 of the second group, a signal arrives at the input of the synchronizer 22 about the start of such transformations (for example, during crystallization, the refractive indices and transmissions change, which leads to a change in illumination of this photosensor 15) (set at the maximum registration rate), simultaneously emitting a signal to the bridge circuit of the corresponding photo sensor, which ensures the supply of the corresponding an increased signal to one of the circuits 12 and 13 for overcoming the moment of moving the actuators 10 and 11. The signals from the first group of photosensors 15 connected to the second inputs of the control circuits 12 and 13 compensate for the temperature inequality and, accordingly, different sensitivity through different optical channels of the parts the object under study 18 by automatically introducing a temperature correction based on the signals of the indicated group of photo sensors. After all or part of the phase transformations have passed (depending on the experiment program), the synchronizer 22 generates a signal to the system 20 for controlling the operation of the power supply unit 19 of the heating unit 17 to turn off or change the temperature while continuing research.

Claims (2)

1. An apparatus for studying phase transformation processes, comprising a housing, optical systems housed therein, guiding with carriages, photo sensors placed on carriages, drives of carriages to which photo sensors are connected through the first inputs of control circuits, the carriage relative displacement sensor connected to the first input of the regiratory device, a thermal node for initiating phase transformations with In series with a power supply unit, a control system and a setting device, characterized in that, in order to increase the measurement accuracy of size parameters, changes during phase transformations, reduce labor intensity and improve the quality of the products obtained in phase transformation processes, two groups are introduced into it additional photosensors 5 placed between optical systems, and a multichannel synchronizer, with the first 5 additional photo sensors are connected to the second inputs of control circuits, the second group of photo sensors is connected to the synchronizer input, the first output of which is connected 0 to the third inputs of the control circuits, the second output of the synchronizer is connected to the second input of the thermal control system, the third output to the setter, the fourth output 5 synchronizers are connected to the second input. registration device. 2. The device according to claim 1, characterized in that the photosensors are made in the form of photovoltaic lines 5 connected in a bridge circuit podtyuchnuyu to the input of the corresponding channel of the synchronizer G UK 18 15 gr ™ Tr W