EMC Research Research Articles

Research Of EMC Immunity In Mine Switches*

According to serious environment in the coal mine, the safety monitoring system of communication equipment (KJJ137 Switch Of Intrinsically safe flame-proof in mine) susceptible to surge, the group of pulse, and the problem of various kinds of electromagnetic interference on the switches EMC research. The study mainly from the power supply isolation and anti-interference, output signal safety barrier, the whole machine technology research aspects such as antistatic treatment. Experiments show that KJJ137 switches through the power surge immunity experiment, the output signal of pulse noise immunity, electrostatic immunity experiment machine. Various EMC experiment achieves level 4 standard, beyond the coal mine safety regulations require all kinds of interference rejection level 3 standards, make KJJ137 Switch Of Intrinsically safe flame-proof in mine, suitable for all kinds of bad environment of coal mine, ensures the mine safety monitoring system is right.

Research on the Statistical Characteristics of Crosstalk in Naval Ships Wiring Harness Based on Polynomial Chaos Expansion Method

Abstract Crosstalk in wiring harness has been studied extensively for its importance in the naval ships electromagnetic compatibility field. An effective and high-efficiency method is proposed in this paper for analyzing Statistical Characteristics of crosstalk in wiring harness with random variation of position based on Polynomial Chaos Expansion (PCE). A typical 14-cable wiring harness was simulated as the object of research. Distance among interfering cable, affected cable and GND is synthesized and analyzed in both frequency domain and time domain. The model of naval ships wiring harness distribution parameter was established by utilizing Legendre orthogonal polynomials as basis functions along with prediction model of statistical characters. Detailed mean value, mean square error, probability density function and reasonable varying range of crosstalk in naval ships wiring harness are described in both time domain and frequency domain. Numerical experiment proves that the method proposed in this paper, not only has good consistency with the MC method can be applied in the naval ships EMC research field to provide theoretical support for guaranteeing safety, but also has better time-efficiency than the MC method. Therefore, the Polynomial Chaos Expansion method.

Erratum: Establishment of EMC Research in Japan and its Future Prospects [IEICE Transactions on Communications Vol.E100.B (2017) , No.9 pp.1623-1632

Erratum: Establishment of EMC Research in Japan and its Future Prospects [IEICE Transactions on Communications Vol.E100.B (2017) , No.9 pp.1623-1632

Establishment of EMC Research in Japan and its Future Prospects

Establishment of EMC Research in Japan and its Future Prospects

EMC Research and Design for a Fiber Access Communication System

A fiber access communication system is developed to cater for the need of network communications industry. In this paper, the basic framework of the system is described; with regards to the characteristics of the system, firstly the electromagnetic interference approaches of the whole system are discussed. Emphasis is laid on the engineering analysis and discussion of the interference sources of electromagnetic emission, with solutions thereof suggested; meanwhile, analysis and discussion are conducted on the electromagnetic immunity of the system in view of electromagnetic coupling paths, with corresponding solutions put forward as well. Lastly, the EMC testing results of the system is presented. Practice has proven that this approach is specially favorable for EMC design and comprehension throughout the system development process, which is also effective for the communication industry in EMC design and verification.

Managers' Preferences for Entry Mode

Using quasi-experimental techniques, this study investigates how managers weight (1) psychic distance from their country of birth to the host country, and (2) their entry mode-specific experience in their assessments of international joint venture (IJV) and acquisition investment opportunities to enter a new country. Based on these findings, the study identifies which of those factors are triggers of a preference for IJVs or acquisitions as entry modes. Our data suggests that IJVs are the preferred entry mode for managers born in countries that are distant from the host country and for those more experienced in acquisitions, while acquisitions are preferred by managers more experienced in IJVs. This study contributes to EMC research (1) by incorporating the individual level of analysis, going beyond the country, firm, and deal levels; (2) by investigating the effects of psychic distance; and (3) by offering a fine-grained analysis of entry mode-specific experience effects.

Research and Application of Electromagnetic Compatibility Technology

Although still in its primary phase up to now, the research about EMC science and its technological application in modern industries has become more and more noticeable. In this paper the main subjects for EMC research are introduced, then discussed briefly are some hot research topics concerning the application of EMC technology, as in such areas as military field, industrial electronics or microelectronics, power industry, onboard or airborne electronics, communications, home appliances and lighting equipments. Then the topic of complex electromagnetic environment concerning modern informationalized battlefield is emphatically addressed. At last several outstanding problems in the development of electromagnetic compatibility technology are introduced concisely.

EMC Europe 2012 Rome Report

EMC research and conferences in Europe have a long tradition. From the series of independent EMC Symposia based in Wroclaw, Zurich and Rome running every second year, has emerged EMC Europe which is organized every year in a European city to provide an international forum for the exchange of technical information on EMC.

Status of Electromagnetic Compatibility Research and Technology Application in some Areas

Although still in its primary phase up to now, the research about the application of EMC technology in engineering field has become more and more noticeable. In this paper the main subjects for EMC research are introduced, then some hot research topics concerning the EMC technology application are described, involving the application in such areas as the military, industrial electronics, power system and customer electronics. At last the general trend of EMC technology development is discussed, using the case of EMC technology development in the military area for reference.

Testing the Immunity of Active Implantable Medical Devices to CW Magnetic Fields up to 1 MHz by an Immersion Method

This paper presents a magnetic-field system and the method developed for testing the immunity of the active implantable medical devices to continuous-wave magnetic fields in the frequency range up to 1 MHz. The system is able to produce magnetic fields of 150 A/m for frequencies up to 100 kHz and strengths decreasing as 1/f between 100 kHz and 1 MHz, with uniformity of the field within +/-2.5% in the volume for tests. To simulate human tissue, the medical device, together with its leads, is placed on a plastic grid in a saline tank that is introduced in the magnetic field of the induction coil. This paper offers an alternative for the injection voltage methods provided in the actual standards for assessing the protection of the implantable medical devices from the effects of the magnetic fields up to 1 MHz. This paper presents the equipment and signals used, the test procedure, and results from the preliminary tests performed at the Food and Drug Administration-Center for Devices and Radiological Health on implantable pacemakers and neurostimulators. The new system and test method are useful for the EMC research on the implantable medical devices.

Variability of Electromyographic and Kinematic Measurement in Dance Medicine and Science Research

Electromyographic and kinematic measurements can yield useful information about the neuromusculoskeletal processes and outcomes of dance performance. Human motor responses are versatile and adaptive. No two performances of a dance movement are precisely the same, not even for the most proficient dancer. To realize the usefulness of EMC and kinematic analysis in dance, performance variability, a natural consequence of the versatility of human motor responses, must be dealt with. At first glance the overwhelming variability seen in existing EMC and kinematic research in dance medicine and science might appear to be a stumbling block to progress. Viewed another way, this same variability can be seen as a useful ally. This paper reviews intra-subject variability, learning, and inter-subject differences in EMC and kinematic work in existing dance research. Evidence is presented that supports the use of variability data as a measure of performance and learning to distinguish experts from novices or to track training changes. Variability in EMC and kinematic data recorded continuously throughout a movement event will be used to examine the temporal relationships between neural and musculoskeletal patterns in dance performance. A case is made for analysis of variability in future investigations of tenets central to dance training such as “core support” and “whole body connectedness.” Throughout, recommendations are made for conventions useful for data collection, handling, and analysis. The ultimate goal is to facilitate comparisons between research reports and development of normative data sets as reference points for discussion of training, performance, clinical practice, and research.