Pub Date : 2001-10-01DOI: 10.1109/IMTC.2000.848683
A. Lowe, H. Eren, Y. Tan, B. Kinsella, S. Bailey
A commonly employed method of corrosion rate measurement is to determine the electrochemical impedance of the corroding material. One technique for estimating the impedance is the noise impedance calculation. While it has been shown to yield useful results, there are a number of problems that require attention. This paper identifies some of those problems-specifically, those of detrending and resolution-and provides a solution that allows continuous, time varying noise resistance and noise impedance calculations to be performed with known time, frequency and magnitude resolutions. Applications to synthetic and experimental data are included as illustrations.
{"title":"Continuous corrosion rate measurement by noise resistance calculation","authors":"A. Lowe, H. Eren, Y. Tan, B. Kinsella, S. Bailey","doi":"10.1109/IMTC.2000.848683","DOIUrl":"https://doi.org/10.1109/IMTC.2000.848683","url":null,"abstract":"A commonly employed method of corrosion rate measurement is to determine the electrochemical impedance of the corroding material. One technique for estimating the impedance is the noise impedance calculation. While it has been shown to yield useful results, there are a number of problems that require attention. This paper identifies some of those problems-specifically, those of detrending and resolution-and provides a solution that allows continuous, time varying noise resistance and noise impedance calculations to be performed with known time, frequency and magnitude resolutions. Applications to synthetic and experimental data are included as illustrations.","PeriodicalId":395500,"journal":{"name":"Proceedings of the 17th IEEE Instrumentation and Measurement Technology Conference [Cat. No. 00CH37066]","volume":"128 14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114071445","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 : 2000-05-01DOI: 10.1109/IMTC.2000.848667
R. Bazzocchi, A. Manara, L. Di Rienzo
A single solid state magnetic sensor can measure a current flowing in a conductor in a non-contact way. In order to improve the accuracy of the measuring system and to reduce the cross-talk effects of other magnetic fields, circular sensor arrays can be fabricated, still preserving low costs. In magnetic sensor circular arrays the sensing elements are assembled on a circle around the conductor. The analogue sum of the sensor output signals is an approximation of the Ampere's circulation. A quite satisfactory cross-talk reduction from external magnetic field can be so achieved. More sophisticated algorithms that combine sensor output signals are necessary to further reduce cross-talk effects. In the paper we present an algorithm that is able to calculate the intensity of a DC current flowing in a rectangular bus-bar, in the presence of cross-talk fields.
{"title":"Spatial DFT analysis from magnetic sensor circular array data for measuring a DC current flowing in a rectangular bus-bar","authors":"R. Bazzocchi, A. Manara, L. Di Rienzo","doi":"10.1109/IMTC.2000.848667","DOIUrl":"https://doi.org/10.1109/IMTC.2000.848667","url":null,"abstract":"A single solid state magnetic sensor can measure a current flowing in a conductor in a non-contact way. In order to improve the accuracy of the measuring system and to reduce the cross-talk effects of other magnetic fields, circular sensor arrays can be fabricated, still preserving low costs. In magnetic sensor circular arrays the sensing elements are assembled on a circle around the conductor. The analogue sum of the sensor output signals is an approximation of the Ampere's circulation. A quite satisfactory cross-talk reduction from external magnetic field can be so achieved. More sophisticated algorithms that combine sensor output signals are necessary to further reduce cross-talk effects. In the paper we present an algorithm that is able to calculate the intensity of a DC current flowing in a rectangular bus-bar, in the presence of cross-talk fields.","PeriodicalId":395500,"journal":{"name":"Proceedings of the 17th IEEE Instrumentation and Measurement Technology Conference [Cat. No. 00CH37066]","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123122584","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 : 2000-05-01DOI: 10.1109/IMTC.2000.846862
D. Crescini, D. Marioli, A. Taroni
A new type of a liquid flow sensor is presented which is based on the thermal time-of-flight principle. Device was manufactured in thick film technology on a 96% alumina substrate adopting thermoresistive and piezoelectric inks. The measuring range covers velocity up to 250 mm/s while the reaction time is less then 2 ms. Furthermore, the sensor is relatively insensitive to pollution. The sensor has been integrated into a flow channel with inner dia. of about 12 mm. The sensor presents a resolution of about 0.7 mm/s together with a repeatability better than 1.5% F.S.
{"title":"Thick film flow sensor based on the thermal time-of-flight principle","authors":"D. Crescini, D. Marioli, A. Taroni","doi":"10.1109/IMTC.2000.846862","DOIUrl":"https://doi.org/10.1109/IMTC.2000.846862","url":null,"abstract":"A new type of a liquid flow sensor is presented which is based on the thermal time-of-flight principle. Device was manufactured in thick film technology on a 96% alumina substrate adopting thermoresistive and piezoelectric inks. The measuring range covers velocity up to 250 mm/s while the reaction time is less then 2 ms. Furthermore, the sensor is relatively insensitive to pollution. The sensor has been integrated into a flow channel with inner dia. of about 12 mm. The sensor presents a resolution of about 0.7 mm/s together with a repeatability better than 1.5% F.S.","PeriodicalId":395500,"journal":{"name":"Proceedings of the 17th IEEE Instrumentation and Measurement Technology Conference [Cat. No. 00CH37066]","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116905098","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 : 2000-05-01DOI: 10.1109/IMTC.2000.848812
Matteo Bertocco, A. Flammini, D. Marioli, A. Taroni
This paper presents a method for robust and accurate real-time frequency estimation when a square wave affected by impulsive noise is considered. The method is tailored for signals coming from typical resonant sensors having frequency from 1 MHz to 10 MHz. It is based on digital modulation and numerical signal processing of the observed square wave. A prototype board has been developed in order to prove the performances of the technique, based on a floating point Digital Signal Processor (DSP) and a 16-bit Analog to Digital Converter (ADC) run at sampling frequency of 48 kHz. Experimental results shows that glitch immunity greatly improves with respect to the classic solution based on counting devices. Moreover, a good resolution (10/sup -7/) is observed even at short measuring time (10 ms).
{"title":"Fast and robust estimation of resonant sensor signal frequency","authors":"Matteo Bertocco, A. Flammini, D. Marioli, A. Taroni","doi":"10.1109/IMTC.2000.848812","DOIUrl":"https://doi.org/10.1109/IMTC.2000.848812","url":null,"abstract":"This paper presents a method for robust and accurate real-time frequency estimation when a square wave affected by impulsive noise is considered. The method is tailored for signals coming from typical resonant sensors having frequency from 1 MHz to 10 MHz. It is based on digital modulation and numerical signal processing of the observed square wave. A prototype board has been developed in order to prove the performances of the technique, based on a floating point Digital Signal Processor (DSP) and a 16-bit Analog to Digital Converter (ADC) run at sampling frequency of 48 kHz. Experimental results shows that glitch immunity greatly improves with respect to the classic solution based on counting devices. Moreover, a good resolution (10/sup -7/) is observed even at short measuring time (10 ms).","PeriodicalId":395500,"journal":{"name":"Proceedings of the 17th IEEE Instrumentation and Measurement Technology Conference [Cat. No. 00CH37066]","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116980639","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 : 2000-05-01DOI: 10.1109/IMTC.2000.848818
J. Delsing, K. Hyyppa, T. Isaksson
An Internet Protocol enabled meter, IP-meter, has been designed. As an example of the IP-meter a power line quality meter fully accessible over the Internet has been implemented. The meter is capable of measuring line frequency harmonics with spectral information, transients, line voltage RMS with sags and swells analysis. The Internet access for this application is made over a thin Ethernet medium. The Internet connection is made with a three part design concept: sensor part, microprocessor part and communication part. Served by the built in Webserver the meter is fully accessible via a standard internet browser. Meter setup, data display etc. are made using html pages and Java applets.
{"title":"The IP-meter, design concept and example implementation of an Internet enabled power line quality meter","authors":"J. Delsing, K. Hyyppa, T. Isaksson","doi":"10.1109/IMTC.2000.848818","DOIUrl":"https://doi.org/10.1109/IMTC.2000.848818","url":null,"abstract":"An Internet Protocol enabled meter, IP-meter, has been designed. As an example of the IP-meter a power line quality meter fully accessible over the Internet has been implemented. The meter is capable of measuring line frequency harmonics with spectral information, transients, line voltage RMS with sags and swells analysis. The Internet access for this application is made over a thin Ethernet medium. The Internet connection is made with a three part design concept: sensor part, microprocessor part and communication part. Served by the built in Webserver the meter is fully accessible via a standard internet browser. Meter setup, data display etc. are made using html pages and Java applets.","PeriodicalId":395500,"journal":{"name":"Proceedings of the 17th IEEE Instrumentation and Measurement Technology Conference [Cat. No. 00CH37066]","volume":"53 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120926721","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 : 2000-05-01DOI: 10.1109/IMTC.2000.848729
F. Garza, M. Das
The time-variation of resistance across the workpieces (weldment) during a weld, provides a nondestructive indication of weld quality. However, inductive noise, power factor, time-varying parameters and random noise complicate the measurement of resistance. Existing measurement methods have focused on the noise and bias problem, approximating the time variation by a single resistance value for each half cycle (8.33 msec). The goal of this paper is to present a method to identify time-varying resistance (and mutual inductance), with finer resolution and accuracy than existing methods. Sampled voltage and current measurements are used with a single-input (current), single-output (voltage), continuous, time-varying model.
{"title":"Identification of time-varying resistance during welding","authors":"F. Garza, M. Das","doi":"10.1109/IMTC.2000.848729","DOIUrl":"https://doi.org/10.1109/IMTC.2000.848729","url":null,"abstract":"The time-variation of resistance across the workpieces (weldment) during a weld, provides a nondestructive indication of weld quality. However, inductive noise, power factor, time-varying parameters and random noise complicate the measurement of resistance. Existing measurement methods have focused on the noise and bias problem, approximating the time variation by a single resistance value for each half cycle (8.33 msec). The goal of this paper is to present a method to identify time-varying resistance (and mutual inductance), with finer resolution and accuracy than existing methods. Sampled voltage and current measurements are used with a single-input (current), single-output (voltage), continuous, time-varying model.","PeriodicalId":395500,"journal":{"name":"Proceedings of the 17th IEEE Instrumentation and Measurement Technology Conference [Cat. No. 00CH37066]","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127378031","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 : 2000-05-01DOI: 10.1109/IMTC.2000.846819
L. Angrisani, A. Baccigalupi, G. D'Angiolo
The present paper m arises from criticisms, originated by telecommunication factories, concerning some problems experienced during production tests of digital telecommunication apparatuses. The fault finding mainly concerns test equipment as well as recommendations actually in force for generating and measuring timing jitter in telecommunication systems based on both (PDH) plesiochronous and (SDH) synchronous digital hierarchies. In the paper, the aforementioned problems are first discussed in detail and then confirmed by some experiments carried out at the laboratories of a great Italian factory To meet the request of production managers, a novel, more accurate method for measuring jitter in PDH/SDH-based systems is proposed. Thanks to a suitable digital signal-processing solution, the method no longer needs timing recovery circuitry, and shows itself insensitive to non-rectangular pulse shapes. The results obtained from the application of the method to the same data signals analyzed at the aforementioned factory finally assess its reliability and efficacy.
{"title":"Problems with jitter measurement in PDH/SDH-based digital telecommunication systems","authors":"L. Angrisani, A. Baccigalupi, G. D'Angiolo","doi":"10.1109/IMTC.2000.846819","DOIUrl":"https://doi.org/10.1109/IMTC.2000.846819","url":null,"abstract":"The present paper m arises from criticisms, originated by telecommunication factories, concerning some problems experienced during production tests of digital telecommunication apparatuses. The fault finding mainly concerns test equipment as well as recommendations actually in force for generating and measuring timing jitter in telecommunication systems based on both (PDH) plesiochronous and (SDH) synchronous digital hierarchies. In the paper, the aforementioned problems are first discussed in detail and then confirmed by some experiments carried out at the laboratories of a great Italian factory To meet the request of production managers, a novel, more accurate method for measuring jitter in PDH/SDH-based systems is proposed. Thanks to a suitable digital signal-processing solution, the method no longer needs timing recovery circuitry, and shows itself insensitive to non-rectangular pulse shapes. The results obtained from the application of the method to the same data signals analyzed at the aforementioned factory finally assess its reliability and efficacy.","PeriodicalId":395500,"journal":{"name":"Proceedings of the 17th IEEE Instrumentation and Measurement Technology Conference [Cat. No. 00CH37066]","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125893246","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 : 2000-05-01DOI: 10.1109/IMTC.2000.848890
P. Crilly, L. da Silva, A. Bernardi
This paper investigates the use of an enhancement technique to speed up the convergence of Jansson's deconvolution method. It uses an inverse filter function applied to the correction term in Jansson's iterative equation. Test cases include peaks that are severely overlapped and have moderate and low signal-to-noise ratios. The results show significant reductions in the final estimate's rms error.
{"title":"Improved speed of convergence for Jansson's iterative deconvolution method","authors":"P. Crilly, L. da Silva, A. Bernardi","doi":"10.1109/IMTC.2000.848890","DOIUrl":"https://doi.org/10.1109/IMTC.2000.848890","url":null,"abstract":"This paper investigates the use of an enhancement technique to speed up the convergence of Jansson's deconvolution method. It uses an inverse filter function applied to the correction term in Jansson's iterative equation. Test cases include peaks that are severely overlapped and have moderate and low signal-to-noise ratios. The results show significant reductions in the final estimate's rms error.","PeriodicalId":395500,"journal":{"name":"Proceedings of the 17th IEEE Instrumentation and Measurement Technology Conference [Cat. No. 00CH37066]","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123216246","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 : 2000-05-01DOI: 10.1109/IMTC.2000.848839
A. Sovlukov, A. Toropainen, P. Vainikainen
Industrial microwave sensors for technological processes dealing with sedimentable substances are considered These sensors are based on the use of waveguide resonators supporting TE/sub 01n/-modes. Inherent to them zero electric field at metal surfaces provides significant reduction of influence of dielectric sediments on measurements results. As examples circular and coaxial waveguide resonator-based sensors of liquid level in tanks are described. Methods for suppression of undesirable modes are described.
{"title":"Microwave sensors for technological processes with sedimentable substances","authors":"A. Sovlukov, A. Toropainen, P. Vainikainen","doi":"10.1109/IMTC.2000.848839","DOIUrl":"https://doi.org/10.1109/IMTC.2000.848839","url":null,"abstract":"Industrial microwave sensors for technological processes dealing with sedimentable substances are considered These sensors are based on the use of waveguide resonators supporting TE/sub 01n/-modes. Inherent to them zero electric field at metal surfaces provides significant reduction of influence of dielectric sediments on measurements results. As examples circular and coaxial waveguide resonator-based sensors of liquid level in tanks are described. Methods for suppression of undesirable modes are described.","PeriodicalId":395500,"journal":{"name":"Proceedings of the 17th IEEE Instrumentation and Measurement Technology Conference [Cat. No. 00CH37066]","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123555825","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 : 2000-05-01DOI: 10.1109/IMTC.2000.846868
Xiujun Li, G. Meijer
This paper presents an accurate, low-cost interface for resistive sensors based on the use of a relaxation oscillator. To obtain high accuracy, good long-term stability and a reduction of the effects of interference and parasitic elements, some classical and new measurement techniques have been applied in the novel sensor interface. Moreover, all multiplicative and additive errors, also the common-mode effect of the interface is eliminated, using a multiple-signal calibration technique. A prototype has been built and was tested. Experimental results show that the interface is able to measure a resistance of 0 to 400 /spl Omega/ with a resolution of 7 m/spl Omega/ and an accuracy of 11 m/spl Omega/. The measurement time is about 100 ms.
{"title":"An accurate, low-cost resistive-sensor interface with a multiple-signal calibration technique","authors":"Xiujun Li, G. Meijer","doi":"10.1109/IMTC.2000.846868","DOIUrl":"https://doi.org/10.1109/IMTC.2000.846868","url":null,"abstract":"This paper presents an accurate, low-cost interface for resistive sensors based on the use of a relaxation oscillator. To obtain high accuracy, good long-term stability and a reduction of the effects of interference and parasitic elements, some classical and new measurement techniques have been applied in the novel sensor interface. Moreover, all multiplicative and additive errors, also the common-mode effect of the interface is eliminated, using a multiple-signal calibration technique. A prototype has been built and was tested. Experimental results show that the interface is able to measure a resistance of 0 to 400 /spl Omega/ with a resolution of 7 m/spl Omega/ and an accuracy of 11 m/spl Omega/. The measurement time is about 100 ms.","PeriodicalId":395500,"journal":{"name":"Proceedings of the 17th IEEE Instrumentation and Measurement Technology Conference [Cat. No. 00CH37066]","volume":"191 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126802226","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：