Pub Date : 2019-11-01DOI: 10.1109/ICEMI46757.2019.9101816
S. Liming, Cao Yonggang, Wang Yue-bing, Zheng Hui-feng
The previous studies have demonstrated that the PVDF pyroelectric sensor has good effects on acoustic power measurement. As a sensor, the accuracy of the measurement results is directly related to the performance of the sensor. One of the most important performance indicators is the sensitivity of the sensor. In this study, the ultrasonic power response sensitivity of the PVDF pyroelectric sensor was defined. To study the sensitivity of the sensor, the finite element method based on the physical model of the PVDF pyroelectric sensor was used to analyze the relationship between the amplitude of output pyroelectric voltage and the acoustic power. Besides that, a large size PVDF pyroelectric sensor was used for the detection of the different acoustic power. Finally, the measurement and simulation results were compared. It is found that the amplitude of output pyroelectric voltage is basically linear with the radiated acoustic power. According to the calculation, the theoretical value of the ultrasonic power response sensitivity is 0. 1606mV/W, the simulation value is 0.1608 mV/W, and the experimental value is 0.1414 mV/W. These three values are basically equal. The study shows that the ultrasonic power response sensitivity of the PVDF pyroelectric sensor is reasonable and feasible. It provides some help for the performance study of the PVDF pyroelectric sensor and indicates the potential to measure high-intensity acoustic power.
{"title":"Study on Ultrasonic power response sensitivity of the PVDF pyroelectric sensor","authors":"S. Liming, Cao Yonggang, Wang Yue-bing, Zheng Hui-feng","doi":"10.1109/ICEMI46757.2019.9101816","DOIUrl":"https://doi.org/10.1109/ICEMI46757.2019.9101816","url":null,"abstract":"The previous studies have demonstrated that the PVDF pyroelectric sensor has good effects on acoustic power measurement. As a sensor, the accuracy of the measurement results is directly related to the performance of the sensor. One of the most important performance indicators is the sensitivity of the sensor. In this study, the ultrasonic power response sensitivity of the PVDF pyroelectric sensor was defined. To study the sensitivity of the sensor, the finite element method based on the physical model of the PVDF pyroelectric sensor was used to analyze the relationship between the amplitude of output pyroelectric voltage and the acoustic power. Besides that, a large size PVDF pyroelectric sensor was used for the detection of the different acoustic power. Finally, the measurement and simulation results were compared. It is found that the amplitude of output pyroelectric voltage is basically linear with the radiated acoustic power. According to the calculation, the theoretical value of the ultrasonic power response sensitivity is 0. 1606mV/W, the simulation value is 0.1608 mV/W, and the experimental value is 0.1414 mV/W. These three values are basically equal. The study shows that the ultrasonic power response sensitivity of the PVDF pyroelectric sensor is reasonable and feasible. It provides some help for the performance study of the PVDF pyroelectric sensor and indicates the potential to measure high-intensity acoustic power.","PeriodicalId":419168,"journal":{"name":"2019 14th IEEE International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"147 Pt 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126311210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.1109/ICEMI46757.2019.9101521
Wang Chengzhuo, Liu Suyang, Guo Xiye, Yang Jun
This paper studies the network topology dynamic problem of the laser inter-satellite link in the navigation constellation. Since the reestablishment time of the laser inter-satellite link is relatively long, this paper envisages that multiple laser intersatellite links reestablish links at the same time when the network topology changes. Therefore, it is necessary to maintain certain performance during the change. The inter-satellite link of the navigation constellation needs to balance the communication and the inter-satellite orbit determination performance. This paper proposes the link transmission cost based on the inter-satellite link distance and the amount of data transmitted on the link to measure the communication performance of the inter-satellite link, and the position dilution of precision to measure the performance of the orbit determination. In this paper, a multi-objective optimization model is established, aiming to improve the performance of the communication and inter-satellite orbit determination. The model used genetic algorithm to solve the problem. The simulation results have shown that the inter-satellite link network topology witnessed an obvious improvement in both the communication performance and the orbit determination performance, and has good communication performance when network changes.
{"title":"Dynamic optimization of laser inter-satellite link network topology based on genetic algorithm","authors":"Wang Chengzhuo, Liu Suyang, Guo Xiye, Yang Jun","doi":"10.1109/ICEMI46757.2019.9101521","DOIUrl":"https://doi.org/10.1109/ICEMI46757.2019.9101521","url":null,"abstract":"This paper studies the network topology dynamic problem of the laser inter-satellite link in the navigation constellation. Since the reestablishment time of the laser inter-satellite link is relatively long, this paper envisages that multiple laser intersatellite links reestablish links at the same time when the network topology changes. Therefore, it is necessary to maintain certain performance during the change. The inter-satellite link of the navigation constellation needs to balance the communication and the inter-satellite orbit determination performance. This paper proposes the link transmission cost based on the inter-satellite link distance and the amount of data transmitted on the link to measure the communication performance of the inter-satellite link, and the position dilution of precision to measure the performance of the orbit determination. In this paper, a multi-objective optimization model is established, aiming to improve the performance of the communication and inter-satellite orbit determination. The model used genetic algorithm to solve the problem. The simulation results have shown that the inter-satellite link network topology witnessed an obvious improvement in both the communication performance and the orbit determination performance, and has good communication performance when network changes.","PeriodicalId":419168,"journal":{"name":"2019 14th IEEE International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127801381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.1109/ICEMI46757.2019.9101410
Jiang Dong, Zhao Liping, Zhao Yanchao, Wang Deyu
The Z-type temperature sensor measuring circuit and shaping circuit were designed for nonlinear problems exist in Z-type temperature sensor. The output frequencies of Z-type temperature sensor were measured at different temperatures. Which dispersion and nonlinear characteristics were analyzed. Linear compensation principle and its significance were explained. Linear output values corresponds precisely with the measured temperature values through nonlinear curve fitting. Test shows that the design of the Z-type temperature sensor error is 2 ‰. Accuracy has been improved. The nonlinear compensation method has practical value for large scale manufacture of Z-sensor.
{"title":"Curve fitting and piecewise linear method for Z-type temperature sensor","authors":"Jiang Dong, Zhao Liping, Zhao Yanchao, Wang Deyu","doi":"10.1109/ICEMI46757.2019.9101410","DOIUrl":"https://doi.org/10.1109/ICEMI46757.2019.9101410","url":null,"abstract":"The Z-type temperature sensor measuring circuit and shaping circuit were designed for nonlinear problems exist in Z-type temperature sensor. The output frequencies of Z-type temperature sensor were measured at different temperatures. Which dispersion and nonlinear characteristics were analyzed. Linear compensation principle and its significance were explained. Linear output values corresponds precisely with the measured temperature values through nonlinear curve fitting. Test shows that the design of the Z-type temperature sensor error is 2 ‰. Accuracy has been improved. The nonlinear compensation method has practical value for large scale manufacture of Z-sensor.","PeriodicalId":419168,"journal":{"name":"2019 14th IEEE International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127804004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.1109/ICEMI46757.2019.9101567
Cui Bowen, Tian Wei
The paper presents a technique of fault detection and diagnosis for open-circuit fault of power switch in inverter-fed motor drives based on wavelet and support vector machine (SVM). The output current of the inverter is processed by wavelet transform, the coefficient value of the recursive wavelet transform is obtained and the value can be used for fault detection. The layer detail coefficient and its energy are obtained by wavelet transform and the fault features are got by normalized the energy. Tri-class SVM is used to isolate switch faults. The classification accuracies obtained from the testing samples are 95.6 and 93.3% with SVM1 and SVM2, respectively. The simulation results show that the method can detect and isolate the faults effectively.
{"title":"Switch open-circuit faults diagnosis of inverter based on wavelet and support vector machine","authors":"Cui Bowen, Tian Wei","doi":"10.1109/ICEMI46757.2019.9101567","DOIUrl":"https://doi.org/10.1109/ICEMI46757.2019.9101567","url":null,"abstract":"The paper presents a technique of fault detection and diagnosis for open-circuit fault of power switch in inverter-fed motor drives based on wavelet and support vector machine (SVM). The output current of the inverter is processed by wavelet transform, the coefficient value of the recursive wavelet transform is obtained and the value can be used for fault detection. The layer detail coefficient and its energy are obtained by wavelet transform and the fault features are got by normalized the energy. Tri-class SVM is used to isolate switch faults. The classification accuracies obtained from the testing samples are 95.6 and 93.3% with SVM1 and SVM2, respectively. The simulation results show that the method can detect and isolate the faults effectively.","PeriodicalId":419168,"journal":{"name":"2019 14th IEEE International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127789538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.1109/ICEMI46757.2019.9101440
Wang Zengmin, L. Honghui, He Qing, Qu Jifeng, Gao Yuan
In the past, most of worldwide Josephson voltage standard systems use liquid helium to cool down the Josephson junction chips. Due to the liquid helium shortage, the cost of operating liquid helium based Josephson voltage standards rises year by year. Therefore there is an increasing need for a compact cryocoooled Josephson voltage standard which has no need of liquid helium. This paper presents a domestic liquid-helium-free dc programmable Josephson voltage standard (PJVS) operating on a cryocooler at 4K or 10 K. In this work, the performance of a NIST-fabricated two volt Josephson junction array (JJA) and a NMIJ-fabricated two volt JJA operating in a cryopackage around the Gifford-McMahon (GM) cryocooler is presented. The JJA chip has been shown to operate successfully with the domestic cryopakage. Stable quantum steps with operating margin greater than 1.4 mA was obtained. Differences in behavior of the NIST-fabricated JJA in liquid helium and on the cryocooler are also discussed.
{"title":"Operation of compact cryocooled 2V programmable josephson voltage standard at NIM","authors":"Wang Zengmin, L. Honghui, He Qing, Qu Jifeng, Gao Yuan","doi":"10.1109/ICEMI46757.2019.9101440","DOIUrl":"https://doi.org/10.1109/ICEMI46757.2019.9101440","url":null,"abstract":"In the past, most of worldwide Josephson voltage standard systems use liquid helium to cool down the Josephson junction chips. Due to the liquid helium shortage, the cost of operating liquid helium based Josephson voltage standards rises year by year. Therefore there is an increasing need for a compact cryocoooled Josephson voltage standard which has no need of liquid helium. This paper presents a domestic liquid-helium-free dc programmable Josephson voltage standard (PJVS) operating on a cryocooler at 4K or 10 K. In this work, the performance of a NIST-fabricated two volt Josephson junction array (JJA) and a NMIJ-fabricated two volt JJA operating in a cryopackage around the Gifford-McMahon (GM) cryocooler is presented. The JJA chip has been shown to operate successfully with the domestic cryopakage. Stable quantum steps with operating margin greater than 1.4 mA was obtained. Differences in behavior of the NIST-fabricated JJA in liquid helium and on the cryocooler are also discussed.","PeriodicalId":419168,"journal":{"name":"2019 14th IEEE International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"132 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127369346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.1109/ICEMI46757.2019.9101590
Zhang Haifeng, C. Kai, Wang Jian, Wang Xin, Liu Changying
During the operation of the EMU, the traction motor generates a lot of heat. The traction motor fan was added to the bottom of the EMU to solve the heat dissipation problem of the traction motor. The bearing is one of the important parts of the traction motor fan, which is of great significance for the bearing life prediction. In this paper, the multi-body dynamics simulation analysis method was proposed. According to the actual working condition of the traction motor fan of the EMU, the mechanical model of the traction motor fan was established. The rigid-flexible multi-body dynamics simulation analysis of the traction motor fan bearing was completed by RecurDyn software. According to the results of dynamic simulation analysis, the fatigue life analysis module was used to predict the life of the finite element. The life prediction result was basically the same as the basic rated life of the bearing, indicating that the life prediction method was reasonable.
{"title":"Life prediction of fan bearings for traction motors of EMU based on RecurDyn","authors":"Zhang Haifeng, C. Kai, Wang Jian, Wang Xin, Liu Changying","doi":"10.1109/ICEMI46757.2019.9101590","DOIUrl":"https://doi.org/10.1109/ICEMI46757.2019.9101590","url":null,"abstract":"During the operation of the EMU, the traction motor generates a lot of heat. The traction motor fan was added to the bottom of the EMU to solve the heat dissipation problem of the traction motor. The bearing is one of the important parts of the traction motor fan, which is of great significance for the bearing life prediction. In this paper, the multi-body dynamics simulation analysis method was proposed. According to the actual working condition of the traction motor fan of the EMU, the mechanical model of the traction motor fan was established. The rigid-flexible multi-body dynamics simulation analysis of the traction motor fan bearing was completed by RecurDyn software. According to the results of dynamic simulation analysis, the fatigue life analysis module was used to predict the life of the finite element. The life prediction result was basically the same as the basic rated life of the bearing, indicating that the life prediction method was reasonable.","PeriodicalId":419168,"journal":{"name":"2019 14th IEEE International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129097137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.1109/ICEMI46757.2019.9101824
Zhou Liren, Pan Yang, Zhu Li
The demodulation circuit is a major part of DC current comparator (DCC), of which performance directly influences the accuracy, sensitivity and noise of whole system. Separately describe the working principle of two demodulation methods, based on which the corresponding circuits were designed; experiments and simulation studies were carried out. The research results show that both methods can realize the function of converting the even harmonic signals characterizing the measured DC current to the corresponding DC voltage. The important advantage of peak difference demodulation is that it can demodulate all even harmonic signals. A high detection gain will be obtained accordingly, which is favorable to increase sensitivity. But the ripple of secondary current is large. Narrow band characteristics of phase sensitive demodulation are beneficial for reducing the system noise level; the ripple of secondary current is very small. As only second harmonic is demodulated, it is necessary to satisfy the best condition to achieve high sensitivity.
{"title":"Design and simulation of DC current comparator demodulation circuit","authors":"Zhou Liren, Pan Yang, Zhu Li","doi":"10.1109/ICEMI46757.2019.9101824","DOIUrl":"https://doi.org/10.1109/ICEMI46757.2019.9101824","url":null,"abstract":"The demodulation circuit is a major part of DC current comparator (DCC), of which performance directly influences the accuracy, sensitivity and noise of whole system. Separately describe the working principle of two demodulation methods, based on which the corresponding circuits were designed; experiments and simulation studies were carried out. The research results show that both methods can realize the function of converting the even harmonic signals characterizing the measured DC current to the corresponding DC voltage. The important advantage of peak difference demodulation is that it can demodulate all even harmonic signals. A high detection gain will be obtained accordingly, which is favorable to increase sensitivity. But the ripple of secondary current is large. Narrow band characteristics of phase sensitive demodulation are beneficial for reducing the system noise level; the ripple of secondary current is very small. As only second harmonic is demodulated, it is necessary to satisfy the best condition to achieve high sensitivity.","PeriodicalId":419168,"journal":{"name":"2019 14th IEEE International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133789961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.1109/ICEMI46757.2019.9101411
Ren Guoyue, Wu Jinjie, Wang Bo, Bai Zhanguo
In this paper, we mainly study the measurement problem of the half-value layer of the narrow-spectrum (250-600) kV X-ray re-filtering narrow-band, and use the experimental and simulation methods to obtain the half-value layer of the high-energy segment re-filtering narrow spectrum. The half-value layer is one of the important parameter characteristics describing the radiation quality. Therefore, measuring the half-value layer plays an important role in the establishment of the radiation quality. The corresponding specification is not given in the additional filter ISO with a tube voltage greater than 300 kV. The method for determining the additional filter thickness used for the tube voltage greater than 300 kV is to linearly fit the relationship between the tube voltage and the additional filter in ISO, and then calculate the thickness value of the additional filter after 300 kV according to the fitted formula. After determining the thickness value, the corresponding energy spectrum is simulated by Monte Carlo simulation. The energy spectrum simulated by Monte Carlo is compared with the theoretical energy spectrum given in ISO-4037. The results show that the average energy and simulation of N250ISO are obtained. The average energy relative deviation is 0.38%, and the N300 average energy relative deviation is 0.35%. The average energy is within 5% in accordance with ISO specifications. The half-value layer of the narrow spectrum can be re-filtered by the experimental (250-600) kV X-ray by the corresponding method given in ISO.
{"title":"(250-600) kv re-filtering narrow-spectrum x-ray half-value layer measurement method","authors":"Ren Guoyue, Wu Jinjie, Wang Bo, Bai Zhanguo","doi":"10.1109/ICEMI46757.2019.9101411","DOIUrl":"https://doi.org/10.1109/ICEMI46757.2019.9101411","url":null,"abstract":"In this paper, we mainly study the measurement problem of the half-value layer of the narrow-spectrum (250-600) kV X-ray re-filtering narrow-band, and use the experimental and simulation methods to obtain the half-value layer of the high-energy segment re-filtering narrow spectrum. The half-value layer is one of the important parameter characteristics describing the radiation quality. Therefore, measuring the half-value layer plays an important role in the establishment of the radiation quality. The corresponding specification is not given in the additional filter ISO with a tube voltage greater than 300 kV. The method for determining the additional filter thickness used for the tube voltage greater than 300 kV is to linearly fit the relationship between the tube voltage and the additional filter in ISO, and then calculate the thickness value of the additional filter after 300 kV according to the fitted formula. After determining the thickness value, the corresponding energy spectrum is simulated by Monte Carlo simulation. The energy spectrum simulated by Monte Carlo is compared with the theoretical energy spectrum given in ISO-4037. The results show that the average energy and simulation of N250ISO are obtained. The average energy relative deviation is 0.38%, and the N300 average energy relative deviation is 0.35%. The average energy is within 5% in accordance with ISO specifications. The half-value layer of the narrow spectrum can be re-filtered by the experimental (250-600) kV X-ray by the corresponding method given in ISO.","PeriodicalId":419168,"journal":{"name":"2019 14th IEEE International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131530119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.1109/ICEMI46757.2019.9101482
Zhao Ke, Liu Yujie, T. Ming, Yang Jinggang, Wang Jian
The switching coil of circuit breaker operating mechanism has many current characteristics and it can reflect the potential failure state. By analyzing these characteristics, the state of circuit breaker can be evaluated reasonably. However, unbalanced class data, large data volume, and poor classification efficacy are the problems that conventional classification methods must face to. This paper presents a distributed ensemble back propagation neural network (DE-BPNN) method to evaluate circuit breaker state based on coil current characteristics. Firstly, the coil current data are de-noised by wavelet packet with db5 and 9 characteristic parameters are extracted. In order to deal with imbalanced class data, the SMOTE method is adopted to ensure that training samples are the same volume. And it also provides a differential sample extraction method to segment training samples. Then, by building multiple differentiated subset BPNN, the voting strategy is used to generate the final results. Finally, DE-BPNN algorithm is deployed on the distributed large data computing platform Spark to reduce the computation time. Two classification algorithms such as K-means and standalone BPNN are used to compare classification accuracy and efficiency with DE-BPNN. The experimental results show that DE-BPNN has high classification accuracy with the unbalanced training data volume. In addition, the computation time of DE-BPNN keeps stable with the increase of data quantity.
{"title":"A distributed ensemble bpnn used for status assessment of circuit breakers based on coil current characteristics","authors":"Zhao Ke, Liu Yujie, T. Ming, Yang Jinggang, Wang Jian","doi":"10.1109/ICEMI46757.2019.9101482","DOIUrl":"https://doi.org/10.1109/ICEMI46757.2019.9101482","url":null,"abstract":"The switching coil of circuit breaker operating mechanism has many current characteristics and it can reflect the potential failure state. By analyzing these characteristics, the state of circuit breaker can be evaluated reasonably. However, unbalanced class data, large data volume, and poor classification efficacy are the problems that conventional classification methods must face to. This paper presents a distributed ensemble back propagation neural network (DE-BPNN) method to evaluate circuit breaker state based on coil current characteristics. Firstly, the coil current data are de-noised by wavelet packet with db5 and 9 characteristic parameters are extracted. In order to deal with imbalanced class data, the SMOTE method is adopted to ensure that training samples are the same volume. And it also provides a differential sample extraction method to segment training samples. Then, by building multiple differentiated subset BPNN, the voting strategy is used to generate the final results. Finally, DE-BPNN algorithm is deployed on the distributed large data computing platform Spark to reduce the computation time. Two classification algorithms such as K-means and standalone BPNN are used to compare classification accuracy and efficiency with DE-BPNN. The experimental results show that DE-BPNN has high classification accuracy with the unbalanced training data volume. In addition, the computation time of DE-BPNN keeps stable with the increase of data quantity.","PeriodicalId":419168,"journal":{"name":"2019 14th IEEE International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131551056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.1109/ICEMI46757.2019.9101442
Luo Qinghua, Liu Sicheng, Yang Yipeng, Ju Chunyu, Yan Xiaozhen
Ultra Wideband (UWB)-based platform is a system which is suitable for high precision distance estimation and localization. A localization algorithm based on UWB platform can gain high accuracy of distance estimation and localization. Among localization methods, the maximum likelihood (MLL) is a simple and accurate location algorithm, which can meet the requirements of location algorithm based on UWB platform. In this paper, a method of maximum likelihood estimation based on outlier detection and UWB platform is studied. Firstly, we analyzed the principle of the UWB-based distance estimation and MLL localization algorithm. Then, the algorithm was verified by simulation analysis of localization accuracy and efficiency. Finally, indoor and outdoor localization experiments were carried out to compare and analyze the localization accuracy of the three localization algorithms in different environments, and the conclusions were drawn. The experimental results demonstrated that MLL has the highest accuracy in indoor and outdoor environments compared with LS and trilateration methods, and it is suitable localization algorithm for UWB localization.
{"title":"An accurate maximum likelihood location method based on UWB platform","authors":"Luo Qinghua, Liu Sicheng, Yang Yipeng, Ju Chunyu, Yan Xiaozhen","doi":"10.1109/ICEMI46757.2019.9101442","DOIUrl":"https://doi.org/10.1109/ICEMI46757.2019.9101442","url":null,"abstract":"Ultra Wideband (UWB)-based platform is a system which is suitable for high precision distance estimation and localization. A localization algorithm based on UWB platform can gain high accuracy of distance estimation and localization. Among localization methods, the maximum likelihood (MLL) is a simple and accurate location algorithm, which can meet the requirements of location algorithm based on UWB platform. In this paper, a method of maximum likelihood estimation based on outlier detection and UWB platform is studied. Firstly, we analyzed the principle of the UWB-based distance estimation and MLL localization algorithm. Then, the algorithm was verified by simulation analysis of localization accuracy and efficiency. Finally, indoor and outdoor localization experiments were carried out to compare and analyze the localization accuracy of the three localization algorithms in different environments, and the conclusions were drawn. The experimental results demonstrated that MLL has the highest accuracy in indoor and outdoor environments compared with LS and trilateration methods, and it is suitable localization algorithm for UWB localization.","PeriodicalId":419168,"journal":{"name":"2019 14th IEEE International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"435 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134317575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：