Nondestructive strength diagnostics of solder joints on printed circuit boards

Ковтун, Ігор; Boiko, Juliy; Petrashchuk, Svitlana

doi:10.1109/ukrmico.2017.8095401

Cited by 14 publications

(7 citation statements)

References 1 publication

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“…The results of the experiment are shown in Table 1, indicating the average value of the bending moment of the robot arm. After statistical analysis according to the classical technique [30]- [34], a regression model of the dependence of the bending moment on factors in coded variables was obtained: 𝑦 = 2,97 + 0,53𝑥 + 0,66𝑥 + 0,29𝑥 The function (9) obtained as a result of the experiment shows thatthe diameter parameter "d" (coded designation x2) is dominant for the increase in torque, and vice versa, the eccentricity parameter "e" (coded designation x3) has the least effect on the bending torque of the robot arm. Thus, in contrast to the abovementioned in the Introduction section of analog solutions to problems, the data indicate the direction of effective control of the torque of the arm of the robot in different planes of the coordinate system.…”

Section: Experimental Studies Of the Process Of Bending The Arm Of The Robotmentioning

confidence: 99%

Design and modeling industrial intelligent robot flexible hand

et al. 2022

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The article describes a description of a fundamentally new design, mathematical model and experimental research of a flexible arm with an anthropomorphic gripper for an industrial robot. The advantage of the proposed design of the robot arm in comparison with the known traditional technical solutions is achieved as close as possible to the functions of the human arm. This property significantly increases the versatility of the robot arm when performing various technological operations. Another difference from the known models of industrial robots is the presence of an anthropomorphic gripping device in the flexible arm, which allows you to service products with different shapes and arbitrary coordinates in space. In addition, the article for the first time proposes a method for calculating the parameters of a new hand and experimental studies of its functioning, which will allow engineers in the field of robotics to create similar designs. The economic effect of the proposed design is that the implementation of the movements of the proposed robot arm does not require separate electromechanical drives for each joint of the kinematic chain of the manipulator. This effect significantly reduces the cost of a robot arm while expanding its technological capabilities.

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Section: Experimental Studies Of the Process Of Bending The Arm Of The Robotmentioning

confidence: 99%

Design and modeling industrial intelligent robot flexible hand

et al. 2022

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“…В даний час існує досить умовний поділ математичних моделей технологічних процесів, в тому числі процесів складання, на детерміновані і статистичні (імовірнісні) [8][9][10].…”

Section: постановка проблемиunclassified

“…Наприклад, для ПФЕ 2 8 (N = 8) в будь-якому випадковому місці цієї таблиці, нехай це буде в даному випадку 5-й рядок 3-го стовпця, послідовно виписуються числа з 1 по 8 з відкиданням чисел більше 8 і вже виписаних. У кожному прикладі виходить така послідовність; 8, 5, 2, 1, 3, 7, 4, 6.…”

Section: постановка проблемиunclassified

Influence of Design and Technology Factors on Ensuring Stability Parameters for Radio-Electronic Devices

KOVTUN¹,

Boiko²,

KARPOVA³

et al. 2021

Herald KhmNU

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The material presented in the article contains the results theoretical research, in terms of research and implementation in production technological design methods for the operational construction of mathematical models’ assembly processes of electronic devices and the choice of optimal parameters of their parts. This technique is based on the statistical principles of active planned experiment, which are currently widely used in various fields of science and technology. The use of these principles, in contrast to traditional methods of conducting a passive experiment and processing the results obtained in this case, allows to drastically reduce the time and material costs for a reliable mathematical description of complex physical laws that underlie the processes of compiling modern electronic devices and choosing the parameters of the parts included in them. The proposed methodology provides for a modification of the principles of an active planned experiment, which can be used when working with electronic devices consisting of independent (explained in the text of the article), in a certain sense, functional units or cascades, the mutual influence of which on the operation of the device is known in advance. It allows you to create such statistically determined models of radio electronic devices that can significantly reduce the labour intensity and economic costs necessary for setting up an experiment. The selection of primary factors included in an active planned experiment should be based on a thorough analysis of the principles of operation and design features of assembly objects, the physical essence of a particular technological process, as well as a study of the experience of mass production and the results of previous research in the relevant areas of technology. The success of the entire active planned experiment and the possibility of effective use of the obtained mathematical model in the design and technological preparation of production almost completely depend on the successful choice of factors. The purpose of the article is related to the development of a technique for the rapid construction of mathematical models of the assembly processes of radio-electronic devices and the selection of the optimal parameters of their parts.

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“…The general technology for components installation (e.g. capacitors, resistors or active devices) on PCBs remains soldering [7]. The soldered joint (SJ) strength is one of the indicators applied to assess its quality.…”

Section: Introductionmentioning

confidence: 99%

“…These systems utilize Scanning Acoustic Microscopy (SAM), Laser Doppler Vibrometry, or a combination of multi-spectral techniques to produce images of circuits and chips for failure mode and fault analysis [14][15][16][17][18][19]. Other techniques involve measuring the acoustic emissions from electronics while the system-under-test is undergoing mechanical stress [7]. Although acoustic imaging techniques have a proven track record in non-destructive testing (NDT), only a few published works in this area leverage nonimaging approaches to NDT, such as acoustical resonance processing and direct analysis of circuit components for failure conditions [20].…”

Section: Introductionmentioning

confidence: 99%

Experimental Studies of Conductive Paths of Printed Circuit Boards by Using Subminiature Eddy Current Transducers

2021

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This paper describes the development and experimental study of a software and hardware complex designed for studying the conductive tracks of printed circuit boards. In the course of this development, a subminiature eddy-current transducer and a measuring system capable of performing measurements using the newly developed transducer were created. The paper contains descriptions of the main parameters of the developed measuring system, and also presents the results of experiments conducted with various printed circuit boards, both with defect-free and those with artificial model defects. These experiments made it possible to confirm the possibility of using the developed measuring system and eddy-current transducer for controlling the conductive tracks on printed circuit boards and determining their quality.

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Nondestructive strength diagnostics of solder joints on printed circuit boards

Cited by 14 publications

References 1 publication

Design and modeling industrial intelligent robot flexible hand

Design and modeling industrial intelligent robot flexible hand

Influence of Design and Technology Factors on Ensuring Stability Parameters for Radio-Electronic Devices

Experimental Studies of Conductive Paths of Printed Circuit Boards by Using Subminiature Eddy Current Transducers

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