RU2787304C1 - Microcontroller stand for studying and researching algorithms for data transmission from wireless sensors - Google Patents

Abstract

FIELD: electrical engineering.

SUBSTANCE: invention relates to the field of electrical engineering, digital electronics and radio engineering and can be used for educational laboratory work and scientific research in this area. The microcontroller stand for studying and researching algorithms for transmitting data from wireless sensors contains: a computer, the first MCU, the second MCU, the third MCU, the first DAC, the second DAC, the programmer, the display unit, the fourth MCU, an oscilloscope, the first radio module, the second radio module, which are, respectively, a radio transmitter and a radio receiver of the ISM bands operating using amplitude modulation of the OOK type. The programmer is equipped with a connector that allows you to connect it to the programming inputs of any of the four MCUs.

EFFECT: expansion of functionality that allows to study and explore data transmission algorithms using microcontroller-controlled radio modules of the ISM bands.

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Description

The technical field to which the invention belongs

The invention relates to the field of electrical engineering, digital electronics and radio engineering and can be used for educational laboratory work and scientific research in this area.

Modern wireless sensors are endowed with the functions of high-quality embedded computing systems, incl. and functions of information exchange via radio channels with remote microprocessor control and management systems. The development and improvement of wireless sensors is impossible without studying and researching the algorithms for their operation, incl. and algorithms for the operation of means of data exchange over ISM radio channels.

State of the art

A stand is known for studying microcontroller control systems, containing a controller board on which a microcontroller is installed, permanent and random access memory, a data transfer interface converter, as well as a group of interface devices consisting of a keyboard unit and a display unit associated with certain microcontroller outputs. Through the network of external information exchange, the microcontroller communicates with the computer on which the debugged program for the microcontroller is prepared and loaded. (Lukichev A.N. Expanding the capabilities of the laboratory complex SDK-1.1 // Scientific and technical bulletin of SPbGITMO (TU). Issue 10. Information and control in technical systems. - St. Petersburg: SPbGITMO (TU), 2003. P. 86-90 .).

The disadvantages of the known solution are limited functionality, the stand does not allow studying and researching the algorithms of wireless sensors and the transmission of information over ISM radio channels using radio modules controlled by microcontrollers,

A well-known stand for the study of microcontroller control systems, containing a controller board on which a microcontroller is installed, a read-only memory, a random access memory and a data transfer interface converter used to communicate with external devices, as well as a group of user interface devices, consisting of a keyboard unit and a block indication, a group of peripheral test and simulating devices, consisting of a source of harmonic signals with adjustable amplitude and frequency, a source of pulsed signals with adjustable frequency and duty cycle, a potentiometer and a first-order integrating RC-link with variable parameters, as well as a switching field, the first group of outputs of which is connected to the pins of the microcontroller, the second group of pins is connected to the pins of the indicated user interface devices, and the third group of pins is connected to the pins of the indicated test and simulating devices. (Patent of the Russian Federation No. 2 402 882, published on October 27, 2010 Bull. No. 30, IPC G09B 23/18).

The disadvantages of the known solution are that the functionality is limited, the stand does not allow studying and researching the algorithms of the operation of wireless sensors and the transmission of information over ISM radio channels using radio modules controlled by microcontrollers.

The closest in technical essence to the claimed technical solution and taken as a prototype is a microcontroller stand for studying and researching digital modulation algorithms used in digital television and radio broadcasting and in mobile communication systems, containing a computer, the first, second and third microcontroller device (MCU), block indicators, a block of simulating devices, the first and second digital-to-analog converters (DAC), the first, second and third amplifiers, the first, second and third antennas, the programmer, while the computer is connected via digital interfaces to the second and third MCU, to the digital outputs the first and second MCU are connected, respectively, the first and second DACs, the outputs of which are connected to the inputs, respectively, of the first and second amplifiers, the outputs of which are connected, respectively, to the first and second antennas, the third antenna is connected to the input of the third amplifier, the output of which is connected to input of analog-to-digital converter (ADC) built into the mic rocontroller of the third MKU, the digital outputs of which are connected to the display unit. The first, second and third amplifiers are based on operational amplifiers. (Patent of the Russian Federation No. 2 656 974, published on 06/07/2018 Bull. No. 16, IPC G09B 23/18).

The disadvantages of the known solution are limited functionality, the stand does not allow studying and researching algorithms for transmitting data from wireless sensors via ISM radio channels using radio modules controlled by microcontrollers.

Disclosure of invention

The technical result that can be achieved with the help of the present invention is to expand the functionality that allows you to study and explore data transmission algorithms using ISM bands controlled by microcontrollers.

The technical result is achieved by the fact that the microcontroller stand for studying and researching algorithms for transmitting data from wireless sensors, containing a computer, the first, second and third MCU, the first and second DACs, a programmer, an indication unit, while the computer is connected via a digital interface to the first, to the second and third MCU, the first DAC is connected to the digital outputs of the first MCU, the digital outputs of the third MCU are connected to the display unit, the output of the programmer is connected to the programming inputs of the first, second and third and the second radio module, while the computer is connected via a digital interface to the fourth MCU, the output of the programmer is connected to the programming input of the fourth MCU, the outputs of the first MCU are connected to the outputs of the first radio module, the outputs of the fourth MCU are connected to the outputs of the second radio module, the second is connected to the digital outputs of the fourth MCU DAC, outputs of the first and second Many DACs are connected, respectively, to the inputs of the first and second channels of the oscilloscope, the programmer is equipped with a connector that allows you to connect it to the inputs of any of the four MCUs, which are based on the Arduino Uno device.

Brief description of the drawings

In FIG. a block diagram of a microcontroller stand for studying and researching algorithms for transmitting data from wireless sensors is presented.

Implementation of the invention

The microcontroller stand for studying and researching algorithms for transmitting data from wireless sensors contains (Fig.): computer 1, first MCU 2, second MCU 3, third MCU 4, first DAC 5, second DAC 6, programmer 7, display unit 8, fourth MCU 9, the oscilloscope 10 (two-channel), the first radio module 11, the second radio module 12, are, respectively, an ISM radio transmitter and receiver operating using OOK (On-Off Keying) type amplitude modulation.

Computer 1 is connected via digital interfaces, such as USB interface, to the first MCU 2, the second MCU 3, the third MCU 4 and the fourth MCU 9. The first DAC 5 and the second DAC 6 are connected to the digital outputs of the first MCU 2 and the fourth MCU 9, respectively. , the outputs of which are connected, respectively, to the inputs of the first and second channels of the oscilloscope 10, the digital outputs of the third MKU 4 are connected to the display unit 8. the outputs of the first MKU 2 are connected to the outputs of the first radio module 11, the outputs of the fourth MKU 5 are connected to the outputs of the second radio module 12, the output of the programmer equipped with a connector that allows you to connect it to the programming inputs of any of the four MCU.

The microcontroller stand for studying and researching data transmission algorithms from wireless sensors works as follows.

The first MCU 2 generates binary codes of digital signals simulating the signals of sensors of physical quantities and outputs to the input of the first DAC 5, and also converts into time intervals, which outputs to the modulating input of the radio module 11 (radio transmitter). Time intervals are high voltage levels (logical ones) separated by low voltage levels (logical zeros).

The second MKU 3 takes time intervals as input, converts them into binary code and transfers them via USB interface to a computer, which displays the decimal equivalent of these codes on the monitor. Thus, the second MCU 3 is designed to organize the control transmitted by the first MCU 2 data. The software for the second MCU 3 is developed in a high-level language such as C/C++.

The third MCU 4 takes time intervals as input, converts them into a binary code and displays them on the indicator 8. Thus, the third MCU 4 is designed to organize the control of the data transmitted by the first MCU 3. The software for the third MKU 4 was developed in Assembly language.

The radio module (radio receiver) 12 generates a time interval at the output, which is received by the fourth MCU 5, converted into a binary code and fed to the inputs of the second DAC 6, from the output of which it enters the input of the second channel of the oscilloscope 10. Thus, the oscilloscope 10 allows you to visually observe the signal coming to the input of the radio transmitter 11 and the signal received by the radio receiver 12, which allows you to evaluate the quality of data transmission.

Information from any of the four MCUs can be displayed on the computer monitor 1. This information can be represented by decimal digits equivalent to binary codes, reflecting the data necessary for the analysis and synthesis of operation algorithms, both for the stand and for the third MCU 4. As a programmer 7, an Atmel programmer, for example, AVRISPmkII, can be used.

The proposed invention is reduced to the expansion of functionality, namely, the introduction of the possibility of studying and researching algorithms for transmitting data from sensors, incl. and data exchange using ISM bands controlled by microcontrollers, operating using OOK type modulation and used to build control and management systems.

Claims (3)

1. A microcontroller stand for studying and researching algorithms for transmitting data from wireless sensors, containing: a computer, the first, second and third microcontroller devices (MCU), the first and second digital-to-analog converters (DAC), a programmer, a display unit, while the computer is connected through a digital interface to the first, second and third MCU, the first DAC is connected to the digital outputs of the first MCU, the digital outputs of the third MCU are connected to the display unit, the output of the programmer is connected to the programming inputs of the first, second and third MCU, characterized in that the stand additionally contains the fourth MKU, two-channel oscilloscope, the first and second radio modules, while the computer is connected via a digital interface to the fourth MKU, the output of the programmer is connected to the programming input of the fourth MKU, the outputs of the first MKU are connected to the outputs of the first radio module, the outputs of the fourth MKU are connected to the outputs of the second radio module, to digital outputs of the fourth MKU connect If the second DAC is used, the outputs of the first and second DACs are connected, respectively, to the inputs of the first and second channels of the oscilloscope. 2. Stand according to claim 1, characterized in that the output of the programmer is equipped with a connector that allows you to connect it to the inputs of any of the four MCU. 3. Stand according to claim 1, characterized in that all four MKUs are based on the Arduino Uno device.

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