Pub Date : 2013-10-01DOI: 10.1109/TENCON.2013.6719033
Shiching Ke, Chih-Hsiung Shen
A new magnetic-catalytic sensing mechanism to increase sensitivity for CMOS MEMS gas sensor with mesh stacked sensing electrodes is proposed. Beyond the conventional power dissipation of heating to maintain a certain working temperature, a novel gas sensor with magnetic-catalytic mechanism works at the ambient temperature without the consideration of active heating. The design and fabrication is realized by the standard 0.35μm CMOS process to fabricate a gas sensor with mesh stacked electrodes. For the preparation of magnetic sensing material, a prepared solution of sol-gel SnO2 is mixed at SnO2 : Fe3O4 = 3:1, which was deposited onto mesh stacked electrodes. Moreover, to obtain a stable gas sensing signal, a pulse sampling scheme is proposed in this research work. Since the resistance of sensing material with sol-gel deposition shows a drift behavior under a DC bias circuit. We have proposed a new signal reading scheme with a pulse-type bias for a bridge sensing circuit. Only under the sampling phase, the sensing current flows through the sensing material which induces a voltage drop across the resistance. For the CO concentration measurement, the sample is tested and verified inside a CO gas chamber with a magnetic field generator of solenoid coil. A careful investigation of measurement results, at horizontal magnetic field, the sensitivity of proposed CO gas sensor reaches 0.492%/ppm under the 12.12 Gauss which shows widely applicable for an ultra-low power chemical microsensor with high sensitivity.
{"title":"Fe3O4 magnetic enhanced CMOS MEMS compatible gas sensor","authors":"Shiching Ke, Chih-Hsiung Shen","doi":"10.1109/TENCON.2013.6719033","DOIUrl":"https://doi.org/10.1109/TENCON.2013.6719033","url":null,"abstract":"A new magnetic-catalytic sensing mechanism to increase sensitivity for CMOS MEMS gas sensor with mesh stacked sensing electrodes is proposed. Beyond the conventional power dissipation of heating to maintain a certain working temperature, a novel gas sensor with magnetic-catalytic mechanism works at the ambient temperature without the consideration of active heating. The design and fabrication is realized by the standard 0.35μm CMOS process to fabricate a gas sensor with mesh stacked electrodes. For the preparation of magnetic sensing material, a prepared solution of sol-gel SnO2 is mixed at SnO2 : Fe3O4 = 3:1, which was deposited onto mesh stacked electrodes. Moreover, to obtain a stable gas sensing signal, a pulse sampling scheme is proposed in this research work. Since the resistance of sensing material with sol-gel deposition shows a drift behavior under a DC bias circuit. We have proposed a new signal reading scheme with a pulse-type bias for a bridge sensing circuit. Only under the sampling phase, the sensing current flows through the sensing material which induces a voltage drop across the resistance. For the CO concentration measurement, the sample is tested and verified inside a CO gas chamber with a magnetic field generator of solenoid coil. A careful investigation of measurement results, at horizontal magnetic field, the sensitivity of proposed CO gas sensor reaches 0.492%/ppm under the 12.12 Gauss which shows widely applicable for an ultra-low power chemical microsensor with high sensitivity.","PeriodicalId":425023,"journal":{"name":"2013 IEEE International Conference of IEEE Region 10 (TENCON 2013)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117214254","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 : 2013-10-01DOI: 10.1109/TENCON.2013.6718993
Guo Ling, Takeshi Yamada, S. Makino, N. Kitawaki
To ensure a satisfactory QoE (Quality of Experience) and facilitate system design in speech recognition services, it is essential to establish a method that can be used to efficiently investigate recognition performance in different noise environments. Previously, we proposed a performance estimation method using the PESQ (Perceptual Evaluation of Speech Quality) as a spectral distortion measure. However, there is the problem that the relationship between the recognition performance and the distortion value differs depending on the noise reduction algorithm used. To solve this problem, we propose a novel performance estimation method that uses an estimator defined as a function of the distortion value and the SNR (Signal to Noise Ratio) of noise-reduced speech. The estimator is applicable to different noise reduction algorithms without any modification. We confirmed the effectiveness of the proposed method by experiments using the AURORA-2J connected digit recognition task and four different noise reduction algorithms.
{"title":"Performance estimation of noisy speech recognition using spectral distortion and SNR of noise-reduced speech","authors":"Guo Ling, Takeshi Yamada, S. Makino, N. Kitawaki","doi":"10.1109/TENCON.2013.6718993","DOIUrl":"https://doi.org/10.1109/TENCON.2013.6718993","url":null,"abstract":"To ensure a satisfactory QoE (Quality of Experience) and facilitate system design in speech recognition services, it is essential to establish a method that can be used to efficiently investigate recognition performance in different noise environments. Previously, we proposed a performance estimation method using the PESQ (Perceptual Evaluation of Speech Quality) as a spectral distortion measure. However, there is the problem that the relationship between the recognition performance and the distortion value differs depending on the noise reduction algorithm used. To solve this problem, we propose a novel performance estimation method that uses an estimator defined as a function of the distortion value and the SNR (Signal to Noise Ratio) of noise-reduced speech. The estimator is applicable to different noise reduction algorithms without any modification. We confirmed the effectiveness of the proposed method by experiments using the AURORA-2J connected digit recognition task and four different noise reduction algorithms.","PeriodicalId":425023,"journal":{"name":"2013 IEEE International Conference of IEEE Region 10 (TENCON 2013)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129853109","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 : 2013-10-01DOI: 10.1109/TENCON.2013.6719020
Hyo-Kyun Jeong, Y. Jeong
The Hough transform is a well-known straight line detection algorithm and it has been widely used for many lane detection algorithms. However, its real-time operation is not guaranteed due to its high computational complexity. In this paper, we designed a Hough transform hardware accelerator on FPGA to process it in real time. Its FPGA logic area usage was reduced by limiting the angles of the lines to (-20, 20) degrees which are enough for lane detection applications, and its arithmetic computations were performed in parallel to speed up the processing time. As a result of FPGA synthesis using Xilinx Vertex-5 XC5VLX330 device, it occupies 4,521 slices and 25.6Kbyte block memory giving performance of 10,000fps in VGA images(5000 edge points). The proposed hardware on FPGA (0.1ms) is 450 times faster than the software implementation on ARM Cortex-A9 1.4GHz (45ms). Our Hough transform hardware was verified by applying it to the newly developed LDWS (lane departure warning system).
{"title":"Design of Hough transform hardware accelerator for lane detection","authors":"Hyo-Kyun Jeong, Y. Jeong","doi":"10.1109/TENCON.2013.6719020","DOIUrl":"https://doi.org/10.1109/TENCON.2013.6719020","url":null,"abstract":"The Hough transform is a well-known straight line detection algorithm and it has been widely used for many lane detection algorithms. However, its real-time operation is not guaranteed due to its high computational complexity. In this paper, we designed a Hough transform hardware accelerator on FPGA to process it in real time. Its FPGA logic area usage was reduced by limiting the angles of the lines to (-20, 20) degrees which are enough for lane detection applications, and its arithmetic computations were performed in parallel to speed up the processing time. As a result of FPGA synthesis using Xilinx Vertex-5 XC5VLX330 device, it occupies 4,521 slices and 25.6Kbyte block memory giving performance of 10,000fps in VGA images(5000 edge points). The proposed hardware on FPGA (0.1ms) is 450 times faster than the software implementation on ARM Cortex-A9 1.4GHz (45ms). Our Hough transform hardware was verified by applying it to the newly developed LDWS (lane departure warning system).","PeriodicalId":425023,"journal":{"name":"2013 IEEE International Conference of IEEE Region 10 (TENCON 2013)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128591789","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}
This paper focuses on the numerical investigation of arc plasma behavior in a certain type molded circuit breaker. A 3-D simulation model based on the magneto-hydrodynamics theory is built and calculated. The basic arc parameters are described by the coupled equations of gas dynamics and electromagnetic field. By adopting a thin layer of nonlinear resistance elements to represent the voltage drop of plasma sheath, the arc splitting process is included. The detailed arc behaviors are presented and preliminarily discussed according to the calculated temperature and arc current distributions. Moreover, experiments are carried out to validate the simulation results. The arc voltage acquired by the numerical and experimental approaches shows good agreement.
{"title":"Simulation of arc characteristics in molded case circuit breaker","authors":"Ruiguang Ma, Junxing Chen, C. Niu, Haonan Sun, Zhexin Chen, Mingliang Wu","doi":"10.1109/TENCON.2013.6718934","DOIUrl":"https://doi.org/10.1109/TENCON.2013.6718934","url":null,"abstract":"This paper focuses on the numerical investigation of arc plasma behavior in a certain type molded circuit breaker. A 3-D simulation model based on the magneto-hydrodynamics theory is built and calculated. The basic arc parameters are described by the coupled equations of gas dynamics and electromagnetic field. By adopting a thin layer of nonlinear resistance elements to represent the voltage drop of plasma sheath, the arc splitting process is included. The detailed arc behaviors are presented and preliminarily discussed according to the calculated temperature and arc current distributions. Moreover, experiments are carried out to validate the simulation results. The arc voltage acquired by the numerical and experimental approaches shows good agreement.","PeriodicalId":425023,"journal":{"name":"2013 IEEE International Conference of IEEE Region 10 (TENCON 2013)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130093236","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 : 2013-10-01DOI: 10.1109/TENCON.2013.6719036
J. Cheng, G. Shi, Ailin Zhang
This paper presents a fast symbolic method for computation of the signal-to-noise ratio (SNR) of switched-capacitor sigma-delta modulators. The key idea is to use a Taylor expansion polynomial to approximate the rational expression of a noise transfer function (NTF). This new method can be used in automatic optimization tools developed for switched-capacitor sigma-delta modulator design.
{"title":"A fast SNR estimation method for sigma-delta modulator design","authors":"J. Cheng, G. Shi, Ailin Zhang","doi":"10.1109/TENCON.2013.6719036","DOIUrl":"https://doi.org/10.1109/TENCON.2013.6719036","url":null,"abstract":"This paper presents a fast symbolic method for computation of the signal-to-noise ratio (SNR) of switched-capacitor sigma-delta modulators. The key idea is to use a Taylor expansion polynomial to approximate the rational expression of a noise transfer function (NTF). This new method can be used in automatic optimization tools developed for switched-capacitor sigma-delta modulator design.","PeriodicalId":425023,"journal":{"name":"2013 IEEE International Conference of IEEE Region 10 (TENCON 2013)","volume":"188 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125676495","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 : 2013-10-01DOI: 10.1109/TENCON.2013.6718913
Zhang Jian, Yan Aqi, Wan Feng, Fan Zheyan, Chen Weining, Zhang Zhi, Wu Dengshan
It is necessary to obtain high-speed dynamic image at a certain position outside an aircraft cabin such that we can monitor the state of the aircraft and measure some parameters quantitatively. We have to flex optical axis for 90 degree at mounting position. To solve long distance optical path conveying, improve imaging quality, and realize clear image at centre and other areas, secondary image is adopted when we design optical system. With the purpose of adapting to vibration and high-speed wind load on the aircraft, we adopt anti-mechanics and anti-wind load design. Finally, we test and verify the design by simulation and experiment.
{"title":"An 90 degree airborne flex camera system","authors":"Zhang Jian, Yan Aqi, Wan Feng, Fan Zheyan, Chen Weining, Zhang Zhi, Wu Dengshan","doi":"10.1109/TENCON.2013.6718913","DOIUrl":"https://doi.org/10.1109/TENCON.2013.6718913","url":null,"abstract":"It is necessary to obtain high-speed dynamic image at a certain position outside an aircraft cabin such that we can monitor the state of the aircraft and measure some parameters quantitatively. We have to flex optical axis for 90 degree at mounting position. To solve long distance optical path conveying, improve imaging quality, and realize clear image at centre and other areas, secondary image is adopted when we design optical system. With the purpose of adapting to vibration and high-speed wind load on the aircraft, we adopt anti-mechanics and anti-wind load design. Finally, we test and verify the design by simulation and experiment.","PeriodicalId":425023,"journal":{"name":"2013 IEEE International Conference of IEEE Region 10 (TENCON 2013)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130211169","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 : 2013-10-01DOI: 10.1109/TENCON.2013.6718446
Bin Yao, Hua Wu, Yun Yang, Y. Chao, Lifeng He
Computation of the Euler number of a binary image is often necessary in image matching, image database retrieval, image analysis, pattern recognition, and computer vision. This paper proposes an improvement on the Euler number computing algorithm used in the famous image processing tool MATLAB. By use of the information obtained during processing the previous pixel, the number of times of checking the neighbor pixels for processing a pixel decrease from 4 to 2. Our method is very simple in principle, and easily implemented. The experimental results demonstrated that our method outperforms significantly conventional Euler number computing algorithms.
{"title":"An improvement on the Euler number computing algorithm used in MATLAB","authors":"Bin Yao, Hua Wu, Yun Yang, Y. Chao, Lifeng He","doi":"10.1109/TENCON.2013.6718446","DOIUrl":"https://doi.org/10.1109/TENCON.2013.6718446","url":null,"abstract":"Computation of the Euler number of a binary image is often necessary in image matching, image database retrieval, image analysis, pattern recognition, and computer vision. This paper proposes an improvement on the Euler number computing algorithm used in the famous image processing tool MATLAB. By use of the information obtained during processing the previous pixel, the number of times of checking the neighbor pixels for processing a pixel decrease from 4 to 2. Our method is very simple in principle, and easily implemented. The experimental results demonstrated that our method outperforms significantly conventional Euler number computing algorithms.","PeriodicalId":425023,"journal":{"name":"2013 IEEE International Conference of IEEE Region 10 (TENCON 2013)","volume":" 22","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132040540","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 : 2013-10-01DOI: 10.1109/TENCON.2013.6718515
M. Abuelma'atti, Zainulabideen J. Khalifa
Over the years researchers have developed and reported a large number of sinusoidal oscillator circuits and classified them as enjoying fully uncoupled independent control of frequency and condition of oscillation. This classification is based on obtaining frequency and condition of oscillation using the Barkhausen criterion. This paper serves as a caution as it appears that this classification is incorrect. Experimental results obtained from recently published circuits; that support this caution, are included.
{"title":"Fully uncoupled independent control of frequency and condition of oscillation: A caution","authors":"M. Abuelma'atti, Zainulabideen J. Khalifa","doi":"10.1109/TENCON.2013.6718515","DOIUrl":"https://doi.org/10.1109/TENCON.2013.6718515","url":null,"abstract":"Over the years researchers have developed and reported a large number of sinusoidal oscillator circuits and classified them as enjoying fully uncoupled independent control of frequency and condition of oscillation. This classification is based on obtaining frequency and condition of oscillation using the Barkhausen criterion. This paper serves as a caution as it appears that this classification is incorrect. Experimental results obtained from recently published circuits; that support this caution, are included.","PeriodicalId":425023,"journal":{"name":"2013 IEEE International Conference of IEEE Region 10 (TENCON 2013)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130916958","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 : 2013-10-01DOI: 10.1109/TENCON.2013.6719028
Chutima Prasartkaew, P. Kovintavewat, S. Choomchuay
This paper presents the application of a random number table for the parity check matrix construction of irregular low-density parity check (LDPC) codes. The performance of the constructed codes was tested in bit-patterned media recording channels. The obtained performance of the proposed codes was compared with that of the existing codes. The simulation results show that, at a block length of 4110 bit and code rate of 0.9, the proposed LDPC code yields better performance than the existing ones, especially at high signal-to-noise ratio scenario.
{"title":"Parity check matrix construction of LDPC codes in bit-patterned media recording channels using Tippett's random number table","authors":"Chutima Prasartkaew, P. Kovintavewat, S. Choomchuay","doi":"10.1109/TENCON.2013.6719028","DOIUrl":"https://doi.org/10.1109/TENCON.2013.6719028","url":null,"abstract":"This paper presents the application of a random number table for the parity check matrix construction of irregular low-density parity check (LDPC) codes. The performance of the constructed codes was tested in bit-patterned media recording channels. The obtained performance of the proposed codes was compared with that of the existing codes. The simulation results show that, at a block length of 4110 bit and code rate of 0.9, the proposed LDPC code yields better performance than the existing ones, especially at high signal-to-noise ratio scenario.","PeriodicalId":425023,"journal":{"name":"2013 IEEE International Conference of IEEE Region 10 (TENCON 2013)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129170891","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 : 2013-10-01DOI: 10.1109/TENCON.2013.6718898
Hongqing Liu, Yong Li, Jianzhong Huang, Yi Zhou
Creating a dictionary is essential in utilizing compressed sensing concept to explore sparsity for many applications. On one hand, a large and fine dictionary is needed to achieve high estimation accuracy. On the other hand, big dictionary also introduce heavy computations. Furthermore, one can imagine that no matter how fine we grid the domain to create the dictionary, there always will be off-grid problem, namely, the parameters we try to estimate do not lie on the grids. In this work, we model this off-grid problem as a basis mismatch. To tackle this issue, we propose to utilize the robust optimization techniques such as stochastic robust and worst case optimization. Simulations in imaging applications confirm that proposed robust compressed sensing approaches indeed outperform the traditional one.
{"title":"Target imaging under robust sparsity recovery","authors":"Hongqing Liu, Yong Li, Jianzhong Huang, Yi Zhou","doi":"10.1109/TENCON.2013.6718898","DOIUrl":"https://doi.org/10.1109/TENCON.2013.6718898","url":null,"abstract":"Creating a dictionary is essential in utilizing compressed sensing concept to explore sparsity for many applications. On one hand, a large and fine dictionary is needed to achieve high estimation accuracy. On the other hand, big dictionary also introduce heavy computations. Furthermore, one can imagine that no matter how fine we grid the domain to create the dictionary, there always will be off-grid problem, namely, the parameters we try to estimate do not lie on the grids. In this work, we model this off-grid problem as a basis mismatch. To tackle this issue, we propose to utilize the robust optimization techniques such as stochastic robust and worst case optimization. Simulations in imaging applications confirm that proposed robust compressed sensing approaches indeed outperform the traditional one.","PeriodicalId":425023,"journal":{"name":"2013 IEEE International Conference of IEEE Region 10 (TENCON 2013)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125369717","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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