Pub Date : 2017-10-01DOI: 10.1109/ICEMI.2017.8265766
Deng Li-bao, Zhang Baoquan, Wang Sha, Qiao Liyan
A well cores reused-based wrapper design is an important approach to minimize SOC test application time and test costs. The combinatorial optimization problem of core wrapper design has been proven to be a NP-hard problem. In this paper, a wrapper scan chain balance algorithm with entropy increase hybrid discrete differential evolution (EIHDE) is proposed to solve the core wrapper problem, which is inspired by thermodynamic system principle of entropy increase and outstanding global searching ability of Differential Evolution (DE). The proposed approach develops a cooperative mutation strategy based on entropy increase for the problem to preserving its interesting search mechanism for discrete domains. In the proposed model, two cooperative encode modes of individuals are introduced for standard differential mutation and the cooperative entropy increase mutation: integer encode mode and binary encode mode. EIHDE controls the search space by differential mutation, and search for superior individual in local space by entropy increase mutation. The combination of two kinds of mutation operations promotes the optimization ability considerably and achieves a better tradeoff between exploitation and exploration. The experimental results of the ITC'02 SOC test benchmarks show that EIHDE can achieve more balanced results compared with other algorithms.
{"title":"Test wrapper algorithm for scan chain balance based on entropy increase hybrid differential evolution","authors":"Deng Li-bao, Zhang Baoquan, Wang Sha, Qiao Liyan","doi":"10.1109/ICEMI.2017.8265766","DOIUrl":"https://doi.org/10.1109/ICEMI.2017.8265766","url":null,"abstract":"A well cores reused-based wrapper design is an important approach to minimize SOC test application time and test costs. The combinatorial optimization problem of core wrapper design has been proven to be a NP-hard problem. In this paper, a wrapper scan chain balance algorithm with entropy increase hybrid discrete differential evolution (EIHDE) is proposed to solve the core wrapper problem, which is inspired by thermodynamic system principle of entropy increase and outstanding global searching ability of Differential Evolution (DE). The proposed approach develops a cooperative mutation strategy based on entropy increase for the problem to preserving its interesting search mechanism for discrete domains. In the proposed model, two cooperative encode modes of individuals are introduced for standard differential mutation and the cooperative entropy increase mutation: integer encode mode and binary encode mode. EIHDE controls the search space by differential mutation, and search for superior individual in local space by entropy increase mutation. The combination of two kinds of mutation operations promotes the optimization ability considerably and achieves a better tradeoff between exploitation and exploration. The experimental results of the ITC'02 SOC test benchmarks show that EIHDE can achieve more balanced results compared with other algorithms.","PeriodicalId":275568,"journal":{"name":"2017 13th IEEE International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"443 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125767095","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 : 2017-10-01DOI: 10.1109/ICEMI.2017.8265849
Kang Wei-xin, Gong Xue, Wang Hongru, Pan Dawei
Aiming at the deficiency of the theoretical analysis of ultrasonic attenuation in soft tissue, based on the propagation mechanism of ultrasonic transmission method in soft tissue, summarized the theoretical calculation formula to analyze the ultrasonic attenuation in soft tissue, after calculation and comparison, the theoretical calculation is close to the experimental value, it can be applied to the analysis of soft tissue conditions. Ultrasonic attenuation characteristic in soft tissue not only related to the soft tissue characteristic parameters and the ultrasonic frequency, but also transmission distance is a great relationship. In this paper, we establish a soft tissue model to simulate the ultrasonic attenuation characteristic in time and frequency domain, and proposed the study on frequency characteristics of the ultrasonic wave based on the continuous wave of Linear frequency modulation(LFM) signal, that can be better used to analyze the frequency characteristics of ultrasonic attenuation in soft tissue.
{"title":"Frequency characteristic of ultrasonic based on soft tissue attenuation model","authors":"Kang Wei-xin, Gong Xue, Wang Hongru, Pan Dawei","doi":"10.1109/ICEMI.2017.8265849","DOIUrl":"https://doi.org/10.1109/ICEMI.2017.8265849","url":null,"abstract":"Aiming at the deficiency of the theoretical analysis of ultrasonic attenuation in soft tissue, based on the propagation mechanism of ultrasonic transmission method in soft tissue, summarized the theoretical calculation formula to analyze the ultrasonic attenuation in soft tissue, after calculation and comparison, the theoretical calculation is close to the experimental value, it can be applied to the analysis of soft tissue conditions. Ultrasonic attenuation characteristic in soft tissue not only related to the soft tissue characteristic parameters and the ultrasonic frequency, but also transmission distance is a great relationship. In this paper, we establish a soft tissue model to simulate the ultrasonic attenuation characteristic in time and frequency domain, and proposed the study on frequency characteristics of the ultrasonic wave based on the continuous wave of Linear frequency modulation(LFM) signal, that can be better used to analyze the frequency characteristics of ultrasonic attenuation in soft tissue.","PeriodicalId":275568,"journal":{"name":"2017 13th IEEE International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125887814","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 : 2017-10-01DOI: 10.1109/ICEMI.2017.8265757
Xing Jie, Kang Qing, Zhang Xuan, Li Feng
With the development of electric propulsion and payload technology, Silicon Carbide which is a typical semiconductor device with wide bandgap will play a greater role in spacecraft power system in the future. It has the advantages as high breakdown voltage, high electron drift velocity, high thermal conductivity, high voltage, high frequency and high anti-radiation. This paper mainly introduces the new research progress of SiC based power diodes, JFETs and MOSFETs, as well as discusses the application prospects of SiC power semiconductor devices in spacecraft power systems.
{"title":"Application Prospect of SiC Power Semiconductor Devices in Spacecraft Power Systems","authors":"Xing Jie, Kang Qing, Zhang Xuan, Li Feng","doi":"10.1109/ICEMI.2017.8265757","DOIUrl":"https://doi.org/10.1109/ICEMI.2017.8265757","url":null,"abstract":"With the development of electric propulsion and payload technology, Silicon Carbide which is a typical semiconductor device with wide bandgap will play a greater role in spacecraft power system in the future. It has the advantages as high breakdown voltage, high electron drift velocity, high thermal conductivity, high voltage, high frequency and high anti-radiation. This paper mainly introduces the new research progress of SiC based power diodes, JFETs and MOSFETs, as well as discusses the application prospects of SiC power semiconductor devices in spacecraft power systems.","PeriodicalId":275568,"journal":{"name":"2017 13th IEEE International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128247982","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 : 2017-10-01DOI: 10.1109/ICEMI.2017.8265704
Jin Haiwei, Z. Lan, Qin Li, Tong Xin
MPM realizes the combination of solid-state power devices and vacuum electronic devices and has both advantages, widely used in military and commercial fields such as radar, electronic countermeasures, active bait, phased array and space communication. MPM module consists of three parts: 1) broadband, miniaturized vacuum power amplifier TWT (VPB TWT), the final amplifier of MPM module; 2) broadband, low noise microwave solid-state amplifier (SSA), pre-amplifier of VPB TWT;3) miniaturized, high-power integrated high-voltage power supply (IPC), and power supply which providing all the high and low voltage to VPB TWT, SSA and module monitoring. By properly distributing the gain between SSA and VPB TWT, MPM has both merit of the vacuum electronics and the solid-state devices. In the United States, 1991 MPM project formally implemented, then unique performance and superior performance of MPM attracted worldwide attention, and Europe and Japan have also launched active MPM and VPB TWT research programs with the same goals as those of the United States. After nearly three decades of development, the company's MPM products of Europe and the United States get miniaturized, serialized, modular, and its reliability was further optimized. Its development trend can be summarized as the following four points. miniaturization, the MPM parts need to be effectively integrated within a structure. Miniaturized TWT, the slow wave system manufacturing process must be replaced. To reduce the length of TWT, it is necessary to reduce the gain of TWT. The loss gain requires a solid state amplifier to compensate. Miniaturized SSA, combined with MMIC and microwave integrated technology, using high-density packaging technology, the researchers developed highly integrated microwave solid-state amplifier, to achieve the TWT excitation, equalization and phase shift and other functions. Miniaturized high-voltage power supply, the development of integrated power supply, especially enormous the power of the volume and stability of integrated power supply, is important to the development of MPM. Compared to the traditional linear power supply, integrated power supply greatly reduces its complexity, size, weight and cost.
{"title":"Status and development of MPM","authors":"Jin Haiwei, Z. Lan, Qin Li, Tong Xin","doi":"10.1109/ICEMI.2017.8265704","DOIUrl":"https://doi.org/10.1109/ICEMI.2017.8265704","url":null,"abstract":"MPM realizes the combination of solid-state power devices and vacuum electronic devices and has both advantages, widely used in military and commercial fields such as radar, electronic countermeasures, active bait, phased array and space communication. MPM module consists of three parts: 1) broadband, miniaturized vacuum power amplifier TWT (VPB TWT), the final amplifier of MPM module; 2) broadband, low noise microwave solid-state amplifier (SSA), pre-amplifier of VPB TWT;3) miniaturized, high-power integrated high-voltage power supply (IPC), and power supply which providing all the high and low voltage to VPB TWT, SSA and module monitoring. By properly distributing the gain between SSA and VPB TWT, MPM has both merit of the vacuum electronics and the solid-state devices. In the United States, 1991 MPM project formally implemented, then unique performance and superior performance of MPM attracted worldwide attention, and Europe and Japan have also launched active MPM and VPB TWT research programs with the same goals as those of the United States. After nearly three decades of development, the company's MPM products of Europe and the United States get miniaturized, serialized, modular, and its reliability was further optimized. Its development trend can be summarized as the following four points. miniaturization, the MPM parts need to be effectively integrated within a structure. Miniaturized TWT, the slow wave system manufacturing process must be replaced. To reduce the length of TWT, it is necessary to reduce the gain of TWT. The loss gain requires a solid state amplifier to compensate. Miniaturized SSA, combined with MMIC and microwave integrated technology, using high-density packaging technology, the researchers developed highly integrated microwave solid-state amplifier, to achieve the TWT excitation, equalization and phase shift and other functions. Miniaturized high-voltage power supply, the development of integrated power supply, especially enormous the power of the volume and stability of integrated power supply, is important to the development of MPM. Compared to the traditional linear power supply, integrated power supply greatly reduces its complexity, size, weight and cost.","PeriodicalId":275568,"journal":{"name":"2017 13th IEEE International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125010862","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 : 2017-10-01DOI: 10.1109/ICEMI.2017.8265913
Fu Zai-ming, Z. Lizhong, Z. Wenjian, Zhao Yijiu
Data generator (DG) plays a very important role in digital testing, which has the characteristics of large data capacity, strong and high-efficiency programmable ability. This paper presents a new data editor of the DG based on hierarchical design, which divides the data editor into data unit editing and sequence editing. To program the deep storage pattern data high-efficiency and convenience, the data unit editing is realized by classification methods: patterns data customization, incremental editing, patterns data import. The Patterns customizers are designed to generate rich popular patterns. The function of incremental editing is to edit user-defined data. And import external pattern data is permitted. Sequence editing is designed to arrange data units and enhance the programmable length of the data editor. The function of the designed data editor is verified in engineering.
{"title":"Design of data editor for deep storage data generator","authors":"Fu Zai-ming, Z. Lizhong, Z. Wenjian, Zhao Yijiu","doi":"10.1109/ICEMI.2017.8265913","DOIUrl":"https://doi.org/10.1109/ICEMI.2017.8265913","url":null,"abstract":"Data generator (DG) plays a very important role in digital testing, which has the characteristics of large data capacity, strong and high-efficiency programmable ability. This paper presents a new data editor of the DG based on hierarchical design, which divides the data editor into data unit editing and sequence editing. To program the deep storage pattern data high-efficiency and convenience, the data unit editing is realized by classification methods: patterns data customization, incremental editing, patterns data import. The Patterns customizers are designed to generate rich popular patterns. The function of incremental editing is to edit user-defined data. And import external pattern data is permitted. Sequence editing is designed to arrange data units and enhance the programmable length of the data editor. The function of the designed data editor is verified in engineering.","PeriodicalId":275568,"journal":{"name":"2017 13th IEEE International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130578880","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 : 2017-10-01DOI: 10.1109/ICEMI.2017.8265939
Kong Deshan, Jiang Dong, Liu Xukun, Wang Deyu
In order to realize the subway acceleration measurement, a magnetic suspension vibrator structure was adopted, and a magnetic suspension acceleration measuring system was designed. The magnetic field variation in the acceleration process was analyzed and simulated by using simulation software. The dynamic equations of the magnetic suspension vibrator under the accelerated motion were deduced. The sensitivity of the measurement system is improved because the method can effectively overcome the friction that the traditional accelerometer can not be avoided. The performance of magnetic levitation acceleration measurement system was analyzed by experimental results. The acceleration of Metro locomotive was measured practically, and the feasibility of the system was verified by taking the experimental data of 3D gyro accelerometer as reference. The experimental results show that the sensitivity of this method is higher. The design method provides a new idea for the design of acceleration sensors.
{"title":"Research on subway acceleration measurement method based on magnetic levitation technology","authors":"Kong Deshan, Jiang Dong, Liu Xukun, Wang Deyu","doi":"10.1109/ICEMI.2017.8265939","DOIUrl":"https://doi.org/10.1109/ICEMI.2017.8265939","url":null,"abstract":"In order to realize the subway acceleration measurement, a magnetic suspension vibrator structure was adopted, and a magnetic suspension acceleration measuring system was designed. The magnetic field variation in the acceleration process was analyzed and simulated by using simulation software. The dynamic equations of the magnetic suspension vibrator under the accelerated motion were deduced. The sensitivity of the measurement system is improved because the method can effectively overcome the friction that the traditional accelerometer can not be avoided. The performance of magnetic levitation acceleration measurement system was analyzed by experimental results. The acceleration of Metro locomotive was measured practically, and the feasibility of the system was verified by taking the experimental data of 3D gyro accelerometer as reference. The experimental results show that the sensitivity of this method is higher. The design method provides a new idea for the design of acceleration sensors.","PeriodicalId":275568,"journal":{"name":"2017 13th IEEE International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"156 10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128719512","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 : 2017-10-01DOI: 10.1109/ICEMI.2017.8265987
Wang Pingxin, L. Congcong, Zhang Zhi, Dai Yanjie, Du Yan, Dong Xianguang, Chen Zhiru, Yang Jie, Li Lin
With the wide application of electronic equipment and the popularization of electrical energy meter of state Grid, the electrical energy meter of site operation is often subject to various types of interference, the EMC of electrical energy meter become increasingly prominent. This methods and the problems of radio frequency electromagnetic field radiated immunity test are analyzed and discussed, the anti-jamming capability of electrical energy meter is improved by using the EMC technology. After rectification, the electrical energy meter passed the radio frequency electromagnetic field radiated immunity test, The measurement performance of the electrical energy meter is guaranteed, the legal rights and interests of both side of power supply and power demand are not damaged.
{"title":"The research and rectification on the test of immunity to electromagnetic RF fields for electrical energy meter","authors":"Wang Pingxin, L. Congcong, Zhang Zhi, Dai Yanjie, Du Yan, Dong Xianguang, Chen Zhiru, Yang Jie, Li Lin","doi":"10.1109/ICEMI.2017.8265987","DOIUrl":"https://doi.org/10.1109/ICEMI.2017.8265987","url":null,"abstract":"With the wide application of electronic equipment and the popularization of electrical energy meter of state Grid, the electrical energy meter of site operation is often subject to various types of interference, the EMC of electrical energy meter become increasingly prominent. This methods and the problems of radio frequency electromagnetic field radiated immunity test are analyzed and discussed, the anti-jamming capability of electrical energy meter is improved by using the EMC technology. After rectification, the electrical energy meter passed the radio frequency electromagnetic field radiated immunity test, The measurement performance of the electrical energy meter is guaranteed, the legal rights and interests of both side of power supply and power demand are not damaged.","PeriodicalId":275568,"journal":{"name":"2017 13th IEEE International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127266496","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 : 2017-10-01DOI: 10.1109/ICEMI.2017.8265945
W. Wentao, Ye Peng, Yang Kuojun, Gao Jian, Huang Wuhuang, Yan Liyue
Digital oscilloscope plays a vital role in almost every field of measurement. However, the performance of the measurement is limited by noise, such as the front-end analog conditioning circuit thermal noise, quantization noise in ADC, etc. Therefore, efficient de-noising algorithm is needed to avoid substantial SNR (Signal-to-Noise Ratio) reduction of the digital oscilloscope. In this paper, we present a digital post-processing techniques to reduce noise for digital oscilloscope based on wavelet packet theory. Compared with direct modification in analog circuit design, no change is needed on the analog part of the proposed method, which is more efficient and economical. The effectiveness and practicability of the proposed method has been validated with simulations and measurements from a digital oscilloscope.
{"title":"De-noising algorithm for digital oscilloscope based on wavelet packet","authors":"W. Wentao, Ye Peng, Yang Kuojun, Gao Jian, Huang Wuhuang, Yan Liyue","doi":"10.1109/ICEMI.2017.8265945","DOIUrl":"https://doi.org/10.1109/ICEMI.2017.8265945","url":null,"abstract":"Digital oscilloscope plays a vital role in almost every field of measurement. However, the performance of the measurement is limited by noise, such as the front-end analog conditioning circuit thermal noise, quantization noise in ADC, etc. Therefore, efficient de-noising algorithm is needed to avoid substantial SNR (Signal-to-Noise Ratio) reduction of the digital oscilloscope. In this paper, we present a digital post-processing techniques to reduce noise for digital oscilloscope based on wavelet packet theory. Compared with direct modification in analog circuit design, no change is needed on the analog part of the proposed method, which is more efficient and economical. The effectiveness and practicability of the proposed method has been validated with simulations and measurements from a digital oscilloscope.","PeriodicalId":275568,"journal":{"name":"2017 13th IEEE International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121963163","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 : 2017-10-01DOI: 10.1109/ICEMI.2017.8265720
Xue Fengguo, Chong Wei, Han Liang, Qu Bingyang, Gao Feng
Select the ATmega128 microcontroller as the master chip, a low-cost, full functional, esay-using, early warning system for monitoring the greenhouse agricultural meteorological elements is developed, which is flexible and practicable for both monitoring and warning the environmental temperature and humidity and other elements in greenhouse. In the range of 0 °C– 50 °C, the resolutions of air temperature and ground temperature are both higher than 0.1 °C, the accuracy is better than 0.5 °C. In the range of 0 °C–50 °C, the air humidity resolution can up to1%, the accuracy is6%when the air humidity≤ 80%, while the accuracy is 9%owhenthe air humidity ≥ 80%. The system can collect the meteorological elements of greenhouse in a high density, at the same time, all measurements are under the automatic real-time monitoring, if the value exceeds the normal range set in advance, the system will alarm which will alert the manual intervention to guarantee the good growth of crops in the greenhouse.
{"title":"Research and design of monitoring and early warning system for agricultural meteorological element in greenhouse","authors":"Xue Fengguo, Chong Wei, Han Liang, Qu Bingyang, Gao Feng","doi":"10.1109/ICEMI.2017.8265720","DOIUrl":"https://doi.org/10.1109/ICEMI.2017.8265720","url":null,"abstract":"Select the ATmega128 microcontroller as the master chip, a low-cost, full functional, esay-using, early warning system for monitoring the greenhouse agricultural meteorological elements is developed, which is flexible and practicable for both monitoring and warning the environmental temperature and humidity and other elements in greenhouse. In the range of 0 °C– 50 °C, the resolutions of air temperature and ground temperature are both higher than 0.1 °C, the accuracy is better than 0.5 °C. In the range of 0 °C–50 °C, the air humidity resolution can up to1%, the accuracy is6%when the air humidity≤ 80%, while the accuracy is 9%owhenthe air humidity ≥ 80%. The system can collect the meteorological elements of greenhouse in a high density, at the same time, all measurements are under the automatic real-time monitoring, if the value exceeds the normal range set in advance, the system will alarm which will alert the manual intervention to guarantee the good growth of crops in the greenhouse.","PeriodicalId":275568,"journal":{"name":"2017 13th IEEE International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124024762","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 : 2017-10-01DOI: 10.1109/ICEMI.2017.8266003
L. Xia, Qi Ningwu, Wang Shuo
Based on master meter principle, a gas flowrate calibration facility with adjustable pressure and temperature is designed. The working principle and structure of this facility is detailly introduced. The calibration method of gas flowmeters is given and the uncertainty is evaluated. With this facility, the gas pressure and temperature can be continuously adjusted, to simulate the practical working pressure and temperature of the tested flowmeter. Therefore, it is suitable for calibrating gas flowmeters, especially those working under high pressure and high temperature conditions. Experimental results show that he proposed facility is effective in calibrating vortex flowmeter at different pressure and temperature.
{"title":"A gas flowrate calibration facility with adjustable pressure and temperature","authors":"L. Xia, Qi Ningwu, Wang Shuo","doi":"10.1109/ICEMI.2017.8266003","DOIUrl":"https://doi.org/10.1109/ICEMI.2017.8266003","url":null,"abstract":"Based on master meter principle, a gas flowrate calibration facility with adjustable pressure and temperature is designed. The working principle and structure of this facility is detailly introduced. The calibration method of gas flowmeters is given and the uncertainty is evaluated. With this facility, the gas pressure and temperature can be continuously adjusted, to simulate the practical working pressure and temperature of the tested flowmeter. Therefore, it is suitable for calibrating gas flowmeters, especially those working under high pressure and high temperature conditions. Experimental results show that he proposed facility is effective in calibrating vortex flowmeter at different pressure and temperature.","PeriodicalId":275568,"journal":{"name":"2017 13th IEEE International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124055745","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}
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