RU57027U1 - LABORATORY INSTALLATION FOR STUDYING THE PHOTO-EFFECT LAWS AND DEFINING A PERMANENT PLAN - Google Patents

Abstract

The utility model relates to the field, use and development of laboratory facilities and can be used in educational institutions to study physical phenomena. A laboratory setup for studying the laws of the photoelectric effect and determining the Planck constant contains: a light source, a condenser lens, a photodetector, a monochromator, the output tube of which is connected to a positioning device located on one optical axis, a radiation intensity recording device, a data visualization device, an ATMEGA16 microcontroller, for automated local and automated remote control of the installation, connected through the interface unit to the computer, to control the device The positioning function, made in the form of a stepper motor, as well as for processing the results obtained from the radiation intensity recording device, a visualization device in the form of a liquid crystal screen, is additionally equipped with local automatic control keys for the installation. This allows you to automate the training experiment and provide remote access to the laboratory setup.

Description

The utility model relates to the field, use and development of laboratory facilities and can be used in educational institutions to study physical phenomena.

The well-known laboratory model "Diagnostics of plasma with remote access via the Internet" (Zimin AM, Averchenko VA, Labzov S.Yu. et al. Automated laboratory setup for remote spectral plasma diagnostics via the Internet // Mat. . "FNTP-2001. Petrozavodsk, 2001. V.2. S.13-17). The automated laboratory setup contains the studied radiation source, a condenser, a monochromator with a diffraction grating, a photoelectronic multiplier for receiving radiation and amplifying the signal in a narrow spectral range, and also an actuating element - a step motor for turning the grating to a position corresponding to the studied spectral range. There are also specialized power supplies for the emitter and photomultiplier tube.

The disadvantage of this setup is the inability to use it to verify the laws of the photoelectric effect and determine the Planck constant.

The closest known laboratory installation is “External photoelectric effect” (Arzhannikov A.V., Klimkin V.F. External photoelectric effect // Novosibirsk State University, 2003, 18 pp.), Which is also intended to determine the Planck constant. This installation consists of a light source, a condenser lens, a photodetector, a monochromator, the output tube of which is connected to a positioning device located on the same optical axis and a radiation intensity recording device.

The disadvantages of this laboratory setup are the lack of automation and remote access.

The objective of the utility model is to create a laboratory setup to study the laws of the photoelectric effect and determine the Planck constant, to provide educational experiments in the remote access mode to the laboratory setup, and to automate educational experiments.

The technical result is the automation of educational experiments and providing remote access to the laboratory setup.

The technical result is achieved in that in a laboratory setup for studying the laws of the photoelectric effect and determining the Planck constant, there are: a light source, a condenser lens, a photodetector, a monochromator, the output tube of which is connected to a positioning device located on one optical axis, a radiation intensity recording device, a visualization device data, contains the ATMEGA16 microcontroller, for the automated local and automated remote control of the installation, connected th through interface unit to a computer, for controlling the positioning device designed as a stepper motor, and for processing the results obtained from the emission intensity device registration imaging device in the form of a liquid crystal display, keys are additionally installed local automated plant control.

The ATMEGA16 microcontroller, connected via a computer interface unit, allows you to automatically receive data from a laboratory setup using a predefined program. Local control of the installation is carried out using the control keys. Remote control of the laboratory setup is also carried out using an external computer through the interface unit. Information received from the computer is processed by the microcontroller, arriving at the device

positioning, allows you to select the region of the spectrum, returning back the data obtained from the device for recording radiation intensity.

Thus, the set of essential features set forth in the formula of the utility model, allows to achieve the desired technical result.

Figure 1 shows a schematic representation of a laboratory setup for studying the laws of the photoelectric effect and determining the Planck constant.

A laboratory setup for studying the laws of the photoelectric effect and determining the Planck constant consists of a light source (1), a condenser lens (2), a monochromator (3), the output tube of which is connected to a stepper motor (4), a photodetector (5) located on one optical axis , microcontroller ATMEGA16 (6), which is described in Evstifeev A.V. ATMR Microcontrollers of the Tiny and Mega Families of the ATMEL Company - M .: Dodeka XXI Publishing House, 2004. P.126-127, connected via the interface unit (7) to the computer (8), on which the Remote Access Server program is installed for communication with laboratory installations based on the ATMEGA16 microcontroller ”(Certificate on the official registration of a computer program No. 20066610243), contains a data visualization device presented in the form of a liquid crystal screen (9) described in Tavernier K. PIC microcontrollers. Application practice: Trans. with fr. - M .: DMK Press, 2003. S.264-269, a positioning device made in the form of a stepper motor (4), for example, known from K. Tavernier PIC microcontrollers. Application practice: Trans. with fr. - M .: DMK Press, 2003. S.259-264, additionally installed keys for local automated control of the installation (10).

The claimed laboratory installation operates as follows. From a light beam from a source (1) focused by a condenser (2) using

monochromator (3), the output pipe of which is connected to the positioning device (4). We select the necessary part of the spectrum by applying it to the photodetector (5). The processed information through the interface unit (7) is transmitted from the ATMEGA16 microcontroller (6) to an external computer (8), while being duplicated on the visualization device (9). Data received from an external computer (8) through the interface unit (7) or from local automated control keys (10) processed by the microcontroller is fed to the positioning device (4), allowing you to select the desired portion of the spectrum.

Claims (1)

Laboratory installation for studying the laws of the photoelectric effect and determining the Planck constant, including a light source, a condenser lens, a photodetector, a monochromator, the output tube of which is connected to a positioning device located on one optical axis, a radiation intensity recording device, a data visualization device, characterized in that it contains an ATMEGA16 microcontroller, for automated local and automated remote control of the installation, connected via a unit connecting to a computer and for controlling a positioning device made in the form of a stepper motor, as well as for processing the results obtained from a radiation intensity recording device, a visualization device in the form of a liquid crystal screen, additional buttons for local automated control of the installation are installed.