Software Part Research Articles

Open-source lower controller for twelve degrees of freedom hydraulic quadruped robot with distributed control scheme

Nowadays, hydraulic quadruped robot shows high power density, good impact resistance and robustness in the research. The controller is the key to realize these features. This paper shows the design of an open-source single-leg controller for the hydraulic quadruped robot Spurlos using a distributed control scheme. The single-leg system of the hydraulic quadruped robot Spurlos contains three angle encoders, three servo valves and six pressure sensors, which has the same components as most single-leg systems. Through the chips designed in the controller, the signal can be received from the encoders and the sensors, meanwhile the signal can be delivered to the servo valves. The software part of the controller adopts the MBD (Model-Based Design) method, which can greatly improve the development efficiency. According to the experiments, the controller design is reasonable, stable operation, and can satisfy the requirements of the hydraulic quadruped robot for leg motion control. The controller designed in this paper provides a solution to the problem that there is no ready-made control board for hydraulic quadruped robot which have three degrees of freedom for each leg. It enables the control researches for hydraulic quadruped robots to be more easily implemented.

Засіб захисту аналогового телефонного зв’язку на основі скремблера зі зміною коефіцієнтів вейвлет-перетворення

The paper proposes a device for providing protection of speech information transmitted over an analog telephone line against unauthorized interception based on a scrambler with modified Latin square wavelet transform coefficients. The developed device consists of hardware and software parts, the hardware part is implemented on the microcontroller platform of the Arduino family, the software part of the device is implemented using the Proteus software environment. As the main part of the functions of the device is performed by a microcontroller, the general structure of the device comprises a microphone, a power supply and an Arduino board. Taking into account the results of the research, it is proposed to modernize the scrambling algorithm by performing permutation operations, matching XOR to the scrambler key, which displays the Latin square itself. A statistical and spectral analysis of the improved method was carried out and a comparison of the execution speed of scrambling algorithms was performed. To improve the security, it was proposed to carry out several stages of permutations of the received coefficients of wavelet transformations. Increasing the variability of the permutations of the wavelet transformation coefficients made it possible to increase the time spent by the attacker on going through all possible combinations. And taking into account that the permutation does not take place in one part of the signal, but in a set of n parts, this in its turn further complicates the procedure of sorting through all possible options. The implementation of the elements of this device with the help of electronic computing equipment and available components makes it an accessible, as well as an effective tool for solving technical information protection tasks, which can ensure the improvement of information protection systems at various business entities.

Retracted] Painting Color Editing System Based on Virtual Reality Sensor Technology

In order to solve the problem of large color matching error in color matching system, this paper proposes a painting color editing system based on virtual reality sensing technology. Apply virtual reality technology (technology) to the proposed system design, and design the system framework based on the three‐tier architecture, which includes data access layer, business logic layer, and presentation layer. The hardware includes spectrophotometer, central processing unit, storage device, and virtual reality somatosensory interaction device. The software part takes BP neural network algorithm as the core, trains and processes the three color values, constructs the automatic matching model of painting colors according to the training results, and realizes the logical operation and analysis of the system software. The experimental results show that although there is still a certain error between the painting color matching output by the system and the actual color matching of the test samples, the maximum absolute error of the matching is relatively small, which is less than 0.05. The error between 6 groups of actual matching samples and predicted matching samples is <1.5. Although the designed system has some errors with the expected color matching, the error is small, so the color difference does not affect the visual presentation effect.

Resource sharing system of college English education based on wireless sensor network

In order to solve the problems of low efficiency and poor security of college English education resource sharing, a resource sharing system of college English education based on wireless sensor network is proposed. The overall function of the resource sharing system is designed. In the hardware design of the system, the hardware of the wireless sensor node is designed. The model of PIC18LF6680 microprocessor is selected, and the standard RS232 serial port is extended to MAX232 level converter. Digital sensors are designed to realise the high-speed transmission of shared resources. On this basis, the hierarchical structure of the system is designed. In the software part, Kalman filter is used to detect noise and measure noise. According to different network conditions, the delay of wireless network system is controlled. The results show that the maximum sharing efficiency of the system is 98%, and the energy consumption of the system is low.

Assessment of the reliability of the information system for identifying mobile devices by IMEI code

This paper evaluates the reliability of the information system for identifying mobile devices by the IMEI code (International Mobile Equipment Identifier). A system for identifying mobile devices by IMEI code is presented, which includes a database that is accessible both locally and remotely. The system allows collecting, storing, and processing information about all devices imported into the country and used in the country. Indicators for calculating the reliability of the information system are selected. Only server hardware with software is considered, and communication lines or other devices connected to the server are not considered. The situation is considered when the database of IMEI-codes and the software part are located on the same equipment, additional redundancy or duplication of nodes, elements, modules are not provided. A method for calculating the reliability of the “server - software” complex is proposed and analytical expressions for calculating the reliability are developed. The obtained results indicate good reliability and fault tolerance of the developed information system.

Efficient implementation of singular value decomposition on shared memory computing systems

The problem of increasing the speed of big data analytics applications remains relevant. The solution may be to create new algorithms, or to increase the efficiency of existing implementations. Many studies are being conducted to optimize the operation of well-known algorithms in application to the computing complex as a whole, including the communications subsystem. At the same time, there is a need for efficient operation of the power of each node of the computing complex. In particular, the question of cache optimization and vectorization of a number of linear algebra algorithms that are part of the big data analytics software on parallel computing systems remains open. The purpose of this work is to increase the efficiency of the software implementation of a parallel linear algebra algorithm using the proposed optimization method. The proposed method was applied to the Jacobi method of singular decomposition of dense matrices. Computational experiments were carried out to determine the speedup of the proposed modification in relation to other software implementations. The results of computational experiments have shown the effectiveness of the proposed method

Providing a training model for producing electronic content to prepare teachers to teach in the virtual space of schools

Background and Aim: Virtual education is one of the types of education that has shown its role in recent years, especially during the Corona period. Therefore, the aim of the current research was to provide a model of electronic content production training for preparing teachers to teach in the virtual environment of elementary schools in Bushehr province. Methods: The current research method was mixed (qualitative-quantitative) and practical in terms of execution method. The qualitative research community included university experts of Bushehr in the academic year of 2020-2021-, of which 40 people were selected based on the rule of theoretical saturation and with the purposeful sampling method. The statistical population of the quantitative part included 552 university professors in Bushehr city in the academic year of 2020-2021, and the sample size was determined based on Cochran's formula of 225 and selected by random sampling. The tools of the qualitative part of the interview and the quantitative part of the questionnaire were made by the researcher. The validity of the qualitative part of the tool was done with face validity, and the reliability was 0.82 with the agreement coefficient between the coders. Also, in the quantitative part of the research, formal validity and reliability were obtained with Cronbach's alpha of 0.85. Qualitative part analysis was done by coding method in MAXQDA3 software and quantitative part was done by partial least squares method in Pls smart3 software. Results: In the qualitative section, 5 components (content, evaluation, technical infrastructure, planning and learning environment) and 41 indicators were identified for the e-learning model. Based on the results of the quantitative part, the factor load, which is the correlation coefficient between the implicit variable (e-learning) and the obvious variables in a model, is related to planning (0.74), content compilation (0.63), evaluation (0.58), technical infrastructure (0.51) and learning environment (0.5), respectively. Also, according to the results of structural equation modeling, the planning component with a coefficient of 0.42, content compilation with a coefficient of 0.21, evaluation with a coefficient of 0.18, technical infrastructure and learning environment with a coefficient of 0.14 respectively had the greatest effect on e-learning. E-learning is the necessity of the educational system in the future. Conclusion: It can be concluded that the first step is to ask professors and experts to identify and solve the challenges of e-learning and plan for the implementation of this system in the education system according to the components of content, evaluation, technical infrastructure, planning and learning environment.

TECHNICAL AUDIT OF SECURITY OF INFORMATION - TELECOMMUNICATION SYSTEMS OF ENTERPRISES

The content of the audit and vulnerability testing of the information and telecommunication system (ITS) of any enterprise is considered. Based on the results of the information security audit, the overall security of the company's ITS is assessed. It is proposed to assess the security of IT using penetration testing in the following areas: penetration testing from outside and inside the information infrastructure, social engineering testing of the company's personnel and testing for resistance to DDoS attacks; assessment of the security of the mobile application, web resource and wireless networks. The proposed general algorithm for IT infrastructure penetration testing (analysis of vulnerabilities and security of information resources) in the form of stages: initialization, passive and active intelligence, operation and post-exploitation, systematization and presentation of the results of security assessment, risk and vulnerability assessment, recommendations regarding them elimination. In stages all operations are carried out without causing real damage to the ITS. The purpose of a technical audit is shown, which covers the components of the ITS and can be considered as an independent examination or a procedure for their investigation in order to assess the condition and identify reserves. Technical audit as a result of checking the software and technical part of the resource provides an opportunity to form a list of key problems and get comprehensive recommendations for their elimination. It is noted that in accordance with modern requirements, technical audit can be used as an audit in the form of remote technical support, and information security audit can be considered as a variant of technical audit. Conducting an information security audit includes: analysis of risks associated with the possibility of information security threats to resources; assessment of the current level of ITS security; localization of "bottlenecks" in the ITS protection system; assessment of ITS compliance with existing standards in the field of security; providing recommendations on the implementation of new and improving the effectiveness of existing ITS security mechanisms. The content of the detailed report of the technical audit of the enterprise's ITS security has been revealed.

English teaching information feedback system based on internet of things

In order to overcome the problems of low feedback accuracy and efficiency in traditional English teaching information feedback system, this paper proposes a new feedback system based on internet of things. The function requirements of the system are analysed and the overall architecture of the system is designed. In order to meet the needs of the system, the hardware part of the system designs the module of English teaching information collection, the load balance module of teaching information and the feedback module of the message board of English teaching information. In the software part of the system, the time series analysis technology in the internet of things is used to evaluate the feedback ability of English teaching information and calculate the output results. The experimental results show that the designed system has higher feedback precision and lower feedback accuracy, has the highest feedback accuracy is 97%, and has stronger practical performance.

A New Approach to Capacitive Sensor Measurements Based on a Microcontroller and a Three-Gate Stable RC Oscillator

A complete smart capacitive sensor solution based on a microcontroller was developed. This approach includes the development of both the hardware and software. The hardware part comprises an 8-bit microcontroller equipped with two timers/counters and a three-gate stable RC relaxation oscillator. The software part handles system configuration, measurement control, communication control, and data processing. Hence, the microcontroller acts as a frequency meter with an adaptive measuring time, and the relaxation oscillator generates a square wave with a frequency depending on the value of the capacitance of the sensor. The paper also proposes a calibration method that reduces the measurement range to 1 pF. The experimentally proven relative measurement errors of sensor capacitance are less than 0.012% for values smaller than 12 pF, and less than 0.0084% for values from 12 pF to 300 pF.

ИНТЕЛЛЕКТУАЛЬНОЕ УСТРОЙСТВО АВТОМАТИЧЕСКОГО НАЗНАЧЕНИЯ РЕЖИМОВ ТОЧЕНИЯ

The hardware and software parts of the intelligent device for automatic assignment of turning modes are described.

Smart Mirror using IoT and Raspberry Pi

Abstract: Smart mirrors as a concept are growing rapidly. These mirrors directly affect the day to day lives of the people as it provides customization and a luxurious lifestyle. With the help of devices like smart mirrors people are getting exposed to technology and are in turn contributing to a tech supported lifestyle. The smart mirror is one such device where a normal mirror acts as a smart device which consists of a user interface with which the user can interact. This paper proposes a model which is robust and can be utilized by individuals in their day to day lives. The proposed model in this paper is in the form of a mirror developed with a combination of hardware and software. The mirror incorporates Oracle VM Virtual Box which supports the Raspbian OS. The model uses the Magic Mirror Module on the software part to implement different features like Calendar, Music App, Weather Forecast, News etc. These features are implemented using their respective API’s. The proposed model can be scaled to add more and more features thus making it more robust, also the model is very cost effective. With the help of this people would be able to ease their lifestyle a bit and automate things as much as possible.

Developing a contactless payment system

The purpose of the study is to design a software and hardware complex for direct contactless trading, taking into account the situation with Covid-19 using a contactless payment system. The article provides an overview of contactless data exchange methods, provides statistics on payment by QR code in the world. The main technologies of contactless payment methods are also given. During the development of the software and hardware complex, the architecture of the information system was presented, the design of the software and hardware parts of the application was described.

Development of information measurement system for experimental research of induction motors

. In order to increase the level of practical training of students, an urgent task is the development of laboratory stands, which will allow, together with the study of the principle of operation of sensors (temperature, lighting, humidity, etc.), to acquire practical skills in their connection, programming of microcontrollers and digital data processing. An electronic device using an AVR microcontroller was chosen as the basic element of the measuring system. which consists of software and hardware parts. The software part of the platform is a free software shell that includes a text editor adapted for writing programming code in the C++ language (Wiring), a compiler, and a set of hardware programming tools. The device supports all modern operating systems such as Linux, MacOS and Windows. The hardware part of the platform is a printed circuit board based on a microcontroller, which contains a programmer, a voltage regulator, signaling LEDs, and a USB / mini USB connector for connecting to a PC. Conducting experimental studies using such stands will allow students, along with the direct measurement of physical AD values ​​with the help of various sensors, to gain additional experience in the peculiarities of working with microcontrollers

SOFTWARE AND HARDWARE COMPLEX FOR INVESTIGATION OF TECHNICAL CHANNELS OF INFORMATION LEAKAGE BASED ON HIGH-FREQUENCY IRRADIATION METHOD

The option of creating an information leakage channel using high-frequency radiation (for example, auxiliary technical means or semi-active stowage devices installed indoors) is one of the active methods for obtaining acoustic speech information. This paper provides a rationale for the requirements for technical characteristics and the scheme for constructing a device for detecting high-frequency radiation signals. It serves to develop a software and hardware complex for the study of technical channels of information leakage, based on the method of high-frequency irradiation. The ultimate goal is to create a prototype of a means for detecting and suppressing receiving devices of high-frequency irradiation equipment based on software-defined devices. The paper describes an approach to the creation of the hardware and software parts of the complex, presents the results of studies on the detection of signals in a wide frequency range.

Development of a Bench for Analyzing the Radio Station Operation in the APCO P25, DMR and TETRA Communication Standards Based on Broadband Software-Defined Radios and GNU Radio Software Toolkit

The article discusses the development of an instrument complex (bench, stand) for the study of digital radio communication standards: APCO P25, DMR and TETRA, based on software-defined radio systems (SDR) technologies in voice mode. The bench is based on the HackRF One broadband SDR transceiver and the GNU Radio open software toolkit. Along with the SDR transceiver HackRF One, it is proposed to use the SDR TV tuner AstroMeta Digital TV Dongle as an available receiver. The structure of the hardware and software parts of the bench is proposed. The software implementation of listed digital radio communication standards is based on the open libraries of the Osmocom project: the BoadBot OP25 and TETRA Live Monitor libraries. The operating system Linux Debian 10 and the software toolkit GNU Radio 3.7 were used for practical testing of the bench functioning. The practical testing results of the developed bench are presented both when interacting in voice mode with radio stations of the specified radio communication standards, and between the SDR transmitter HackRF One and the SDR TV tuner AstroMeta Digital TV Dongle. For the radio communication standards APCO P25 and DMR, the receiving and transmission modes of the speech signal have been practically tested on the developed bench, and for the radio communication standard TETRA, the modes of scanning the radio broadcast and receiving the speech signal have been tested. As a bench operability confirmation for the listed radio communication standards, the screenshots of programs implementing the specified modes of interaction between the bench hardware components are given. The proposed bench architecture allows to expand the list of supported radio standards. The developed bench can be used: 1) for educational purposes in the study of radio communication standards; 2) in the development and debugging of radio communication systems under development; 3) for control testing during the release of radio systems.

Research on a mobile terminal-based control platform for the delivery and management of power material transportation

Some of the power material transportation delivery control platforms have the defect of too small throughput in the actual application scenarios, therefore, a mobile terminal-based power material transportation delivery control platform is designed. The hardware part: the mobile terminal is used to arrange the necessary equipment for operation monitoring, such as monitoring screens and servers, and is connected to the industrial control mainframe through a USB connection cable and to GPS devices; the software part is on the basis of the established reserve strategy, the process of power material transport delivery control is improved, the number of profitable stored within the cross item is calculated for each demand entry and the corresponding inventory entry, and the balance profitability constraints are extracted, isolating the base stations and optimizing the system’s intelligent inventory function. Test results: The power material transport delivery control platform in the paper has a higher average throughput than the other two power material transport delivery control platforms: 26.344req/s and 24.495req/s respectively, indicating a higher practical value of the designed power material transport delivery control platform after making full use of mobile terminals.

Vulnerability Detection System for Power Information Based on Network Traffic Identification Technology

A power information vulnerability detection system has the problem of a low network survival rate. Therefore, a power information vulnerability detection system based on network traffic identification technology is designed. In the hardware part, the memory is configured as a synchronous interface and 4 DRAMs, and the level input and output power of the chip are kept in a state compatible with LVTTL levels; in the software part, the power information network indicators are obtained, the importance of network elements is reflected through a mesoscope, the failure characteristics of components are extracted using network traffic identification technology, a critical area is delineated, and the port protocols and association libraries of the passages are matched to optimize the system vulnerability detection function. Through analysis of the simulation results, it can be obtained that the network survival rate of the power information vulnerability detection system in this paper is 17.657% and 17.931% higher than that obtained by the other two power information vulnerability detection systems, respectively, indicating that the designed power information vulnerability detection system is more effective when fully integrated with network traffic identification techniques.

Design of A Grid-connected Control System for Distributed Photovoltaic Power Generation Based on PLC

Distributed photovoltaics interfere with continuous power generation after grid connection. In the face of the failure of a single module, the current grid-connected control system needs to readjust system parameters to flexibly adapt to equipment operating conditions. Therefore, this paper is researching a photovoltaic power generation grid-connected control system based on PLC. In the hardware part, PLC is used to complete power generation control, monitoring MCU, data acquisition, control, and other modules. In the software part, the grid-connected state is optimized and controlled according to the distributed photovoltaic output power and the remaining energy storage capacity. The PLC is the execution center, which will control the on-off state of the equipment switch after the data operation. The experimental results show that the designed system can optimally control the power generation and energy storage units according to the power change, reduce the cost of electricity consumption through the adjustment of charge and discharge, reduce the IO usage rate, and improve the concurrent response ability of users. The design system not only guarantees the quality and efficiency of photovoltaic grid connection but also realizes rapid networking and independent tracking of power points to meet the requirements of flexible communication.

Laser Additive Remanufacturing Cladding Thickness Detection System

As an important parameter in laser additive remanufacturing technology, cladding thickness is related to the quality of remanufacturing. Thickness detection during the cladding process can help improve the cladding quality and facilitate manual adjustment of parameters in real time to optimize the cladding thickness. This system develops a set of cladding thickness detection system based on laser displacement sensor. The system consists of hardware and software parts. The hardware part includes laser displacement sensor, mounting plate, digital signal acquisition device and laser cladding system. The software part a set of data acquisition software is developed according to Visual Studio. The system uses two methods to measure, and eliminates the error caused by the tilt factor of the worktable, and realizes the online measurement of cladding thickness.