Mass Measurement Method for the Electronic Balance Based on Continuous-Time Sigma-Delta Modulator
An approach to mass measurement for the electronic balance based on continuous-time sigma-delta (CT <inline-formula> <tex-math notation="LaTeX">\Sigma -\Delta </tex-math></inline-formula>) modulator is described in this paper. As an effect of multifarious interferin...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Huang, Qiang [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2016 |
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| Schlagwörter: |
electromagnetic-force-compensated load cell (EMCC) Continuous-time sigma-delta (CT Σ-Δ) Semiconductor device measurement |
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| Übergeordnetes Werk: |
Enthalten in: IEEE transactions on instrumentation and measurement - New York, NY, 1963, 65(2016), 6, Seite 1300-1309 |
|---|---|
| Übergeordnetes Werk: |
volume:65 ; year:2016 ; number:6 ; pages:1300-1309 |
| Links: |
|---|
| DOI / URN: |
10.1109/TIM.2015.2490358 |
|---|
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OLC197776391X |
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| 245 | 1 | 0 | |a Mass Measurement Method for the Electronic Balance Based on Continuous-Time Sigma-Delta Modulator |
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| 520 | |a An approach to mass measurement for the electronic balance based on continuous-time sigma-delta (CT <inline-formula> <tex-math notation="LaTeX">\Sigma -\Delta </tex-math></inline-formula>) modulator is described in this paper. As an effect of multifarious interfering noises, the accuracy of the electronic balance is restricted. The general idea of this proposed approach is to apply an electromagnetic-force-compensated load cell (EMCC), a related signal processing circuit, and a composite filter. The circuit mainly consists of a proportional-integral-differential controller and a pulsewidth modulator, which combine with the EMCC to form a CT <inline-formula> <tex-math notation="LaTeX">\Sigma -\Delta </tex-math></inline-formula> modulator. As the CT <inline-formula> <tex-math notation="LaTeX">\Sigma -\Delta </tex-math></inline-formula> modulator possesses inherent antialiasing filtering, oversampling, and noise-shaping characteristics, the interfering noises can be effectively removed by the composite filter that is composed of two <inline-formula> <tex-math notation="LaTeX">{\rm sinc}^{N^{^{^{}}} </tex-math></inline-formula> filters. The simulations for both of the electronic balance models adopting the proposed approach and working in conventional pulse current mode are analyzed by adding the white Gaussian noise in Simulink. The simulation results demonstrate the effectiveness of this proposed approach, the proposed electronic balance in the field can improve its signal-to-noise ratio, and the testing results meet the requirement for the weighing accuracy of the special-class scale defined by Organisation Internationale De Métrologie Légale R76 nonautomatic weighing instruments. | ||
| 650 | 4 | |a electromagnetic-force-compensated load cell (EMCC) | |
| 650 | 4 | |a Continuous-time sigma-delta (CT Σ-Δ) | |
| 650 | 4 | |a sincN | |
| 650 | 4 | |a Semiconductor device measurement | |
| 650 | 4 | |a Pulse width modulation | |
| 650 | 4 | |a Clocks | |
| 650 | 4 | |a pulse current | |
| 650 | 4 | |a Quantization (signal) | |
| 650 | 4 | |a Current measurement | |
| 650 | 4 | |a mass measurement | |
| 650 | 4 | |a electronic balance | |
| 650 | 4 | |a Noise measurement | |
| 650 | 4 | |a Continuous-time sigma-delta (CT [sigma]-[delta]) | |
| 650 | 4 | |a Research | |
| 650 | 4 | |a Equipment and supplies | |
| 650 | 4 | |a Signal processing | |
| 650 | 4 | |a Usage | |
| 650 | 4 | |a Pulse-duration modulation | |
| 700 | 1 | |a Teng, Zhaosheng |4 oth | |
| 700 | 1 | |a Tang, Xiang |4 oth | |
| 700 | 1 | |a Lin, Haijun |4 oth | |
| 700 | 1 | |a Wen, He |4 oth | |
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10.1109/TIM.2015.2490358 doi PQ20160719 (DE-627)OLC197776391X (DE-599)GBVOLC197776391X (PRQ)g1413-bbec8d9d161dd18a8f7b14b99110e63813b55e88daf7f448d9c3897ea206c9320 (KEY)0079426020160000065000601300massmeasurementmethodfortheelectronicbalancebasedo DE-627 ger DE-627 rakwb eng 620 DNB 50.21 bkl 53.00 bkl Huang, Qiang verfasserin aut Mass Measurement Method for the Electronic Balance Based on Continuous-Time Sigma-Delta Modulator 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier An approach to mass measurement for the electronic balance based on continuous-time sigma-delta (CT <inline-formula> <tex-math notation="LaTeX">\Sigma -\Delta </tex-math></inline-formula>) modulator is described in this paper. As an effect of multifarious interfering noises, the accuracy of the electronic balance is restricted. The general idea of this proposed approach is to apply an electromagnetic-force-compensated load cell (EMCC), a related signal processing circuit, and a composite filter. The circuit mainly consists of a proportional-integral-differential controller and a pulsewidth modulator, which combine with the EMCC to form a CT <inline-formula> <tex-math notation="LaTeX">\Sigma -\Delta </tex-math></inline-formula> modulator. As the CT <inline-formula> <tex-math notation="LaTeX">\Sigma -\Delta </tex-math></inline-formula> modulator possesses inherent antialiasing filtering, oversampling, and noise-shaping characteristics, the interfering noises can be effectively removed by the composite filter that is composed of two <inline-formula> <tex-math notation="LaTeX">{\rm sinc}^{N^{^{^{}}} </tex-math></inline-formula> filters. The simulations for both of the electronic balance models adopting the proposed approach and working in conventional pulse current mode are analyzed by adding the white Gaussian noise in Simulink. The simulation results demonstrate the effectiveness of this proposed approach, the proposed electronic balance in the field can improve its signal-to-noise ratio, and the testing results meet the requirement for the weighing accuracy of the special-class scale defined by Organisation Internationale De Métrologie Légale R76 nonautomatic weighing instruments. electromagnetic-force-compensated load cell (EMCC) Continuous-time sigma-delta (CT Σ-Δ) sincN Semiconductor device measurement Pulse width modulation Clocks pulse current Quantization (signal) Current measurement mass measurement electronic balance Noise measurement Continuous-time sigma-delta (CT [sigma]-[delta]) Research Equipment and supplies Signal processing Usage Pulse-duration modulation Teng, Zhaosheng oth Tang, Xiang oth Lin, Haijun oth Wen, He oth Enthalten in IEEE transactions on instrumentation and measurement New York, NY, 1963 65(2016), 6, Seite 1300-1309 (DE-627)129358576 (DE-600)160442-9 (DE-576)014730863 0018-9456 nnns volume:65 year:2016 number:6 pages:1300-1309 http://dx.doi.org/10.1109/TIM.2015.2490358 Volltext http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=7422075 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC GBV_ILN_24 GBV_ILN_30 GBV_ILN_70 GBV_ILN_170 GBV_ILN_2014 GBV_ILN_2061 50.21 AVZ 53.00 AVZ AR 65 2016 6 1300-1309 |
| spelling |
10.1109/TIM.2015.2490358 doi PQ20160719 (DE-627)OLC197776391X (DE-599)GBVOLC197776391X (PRQ)g1413-bbec8d9d161dd18a8f7b14b99110e63813b55e88daf7f448d9c3897ea206c9320 (KEY)0079426020160000065000601300massmeasurementmethodfortheelectronicbalancebasedo DE-627 ger DE-627 rakwb eng 620 DNB 50.21 bkl 53.00 bkl Huang, Qiang verfasserin aut Mass Measurement Method for the Electronic Balance Based on Continuous-Time Sigma-Delta Modulator 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier An approach to mass measurement for the electronic balance based on continuous-time sigma-delta (CT <inline-formula> <tex-math notation="LaTeX">\Sigma -\Delta </tex-math></inline-formula>) modulator is described in this paper. As an effect of multifarious interfering noises, the accuracy of the electronic balance is restricted. The general idea of this proposed approach is to apply an electromagnetic-force-compensated load cell (EMCC), a related signal processing circuit, and a composite filter. The circuit mainly consists of a proportional-integral-differential controller and a pulsewidth modulator, which combine with the EMCC to form a CT <inline-formula> <tex-math notation="LaTeX">\Sigma -\Delta </tex-math></inline-formula> modulator. As the CT <inline-formula> <tex-math notation="LaTeX">\Sigma -\Delta </tex-math></inline-formula> modulator possesses inherent antialiasing filtering, oversampling, and noise-shaping characteristics, the interfering noises can be effectively removed by the composite filter that is composed of two <inline-formula> <tex-math notation="LaTeX">{\rm sinc}^{N^{^{^{}}} </tex-math></inline-formula> filters. The simulations for both of the electronic balance models adopting the proposed approach and working in conventional pulse current mode are analyzed by adding the white Gaussian noise in Simulink. The simulation results demonstrate the effectiveness of this proposed approach, the proposed electronic balance in the field can improve its signal-to-noise ratio, and the testing results meet the requirement for the weighing accuracy of the special-class scale defined by Organisation Internationale De Métrologie Légale R76 nonautomatic weighing instruments. electromagnetic-force-compensated load cell (EMCC) Continuous-time sigma-delta (CT Σ-Δ) sincN Semiconductor device measurement Pulse width modulation Clocks pulse current Quantization (signal) Current measurement mass measurement electronic balance Noise measurement Continuous-time sigma-delta (CT [sigma]-[delta]) Research Equipment and supplies Signal processing Usage Pulse-duration modulation Teng, Zhaosheng oth Tang, Xiang oth Lin, Haijun oth Wen, He oth Enthalten in IEEE transactions on instrumentation and measurement New York, NY, 1963 65(2016), 6, Seite 1300-1309 (DE-627)129358576 (DE-600)160442-9 (DE-576)014730863 0018-9456 nnns volume:65 year:2016 number:6 pages:1300-1309 http://dx.doi.org/10.1109/TIM.2015.2490358 Volltext http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=7422075 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC GBV_ILN_24 GBV_ILN_30 GBV_ILN_70 GBV_ILN_170 GBV_ILN_2014 GBV_ILN_2061 50.21 AVZ 53.00 AVZ AR 65 2016 6 1300-1309 |
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10.1109/TIM.2015.2490358 doi PQ20160719 (DE-627)OLC197776391X (DE-599)GBVOLC197776391X (PRQ)g1413-bbec8d9d161dd18a8f7b14b99110e63813b55e88daf7f448d9c3897ea206c9320 (KEY)0079426020160000065000601300massmeasurementmethodfortheelectronicbalancebasedo DE-627 ger DE-627 rakwb eng 620 DNB 50.21 bkl 53.00 bkl Huang, Qiang verfasserin aut Mass Measurement Method for the Electronic Balance Based on Continuous-Time Sigma-Delta Modulator 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier An approach to mass measurement for the electronic balance based on continuous-time sigma-delta (CT <inline-formula> <tex-math notation="LaTeX">\Sigma -\Delta </tex-math></inline-formula>) modulator is described in this paper. As an effect of multifarious interfering noises, the accuracy of the electronic balance is restricted. The general idea of this proposed approach is to apply an electromagnetic-force-compensated load cell (EMCC), a related signal processing circuit, and a composite filter. The circuit mainly consists of a proportional-integral-differential controller and a pulsewidth modulator, which combine with the EMCC to form a CT <inline-formula> <tex-math notation="LaTeX">\Sigma -\Delta </tex-math></inline-formula> modulator. As the CT <inline-formula> <tex-math notation="LaTeX">\Sigma -\Delta </tex-math></inline-formula> modulator possesses inherent antialiasing filtering, oversampling, and noise-shaping characteristics, the interfering noises can be effectively removed by the composite filter that is composed of two <inline-formula> <tex-math notation="LaTeX">{\rm sinc}^{N^{^{^{}}} </tex-math></inline-formula> filters. The simulations for both of the electronic balance models adopting the proposed approach and working in conventional pulse current mode are analyzed by adding the white Gaussian noise in Simulink. The simulation results demonstrate the effectiveness of this proposed approach, the proposed electronic balance in the field can improve its signal-to-noise ratio, and the testing results meet the requirement for the weighing accuracy of the special-class scale defined by Organisation Internationale De Métrologie Légale R76 nonautomatic weighing instruments. electromagnetic-force-compensated load cell (EMCC) Continuous-time sigma-delta (CT Σ-Δ) sincN Semiconductor device measurement Pulse width modulation Clocks pulse current Quantization (signal) Current measurement mass measurement electronic balance Noise measurement Continuous-time sigma-delta (CT [sigma]-[delta]) Research Equipment and supplies Signal processing Usage Pulse-duration modulation Teng, Zhaosheng oth Tang, Xiang oth Lin, Haijun oth Wen, He oth Enthalten in IEEE transactions on instrumentation and measurement New York, NY, 1963 65(2016), 6, Seite 1300-1309 (DE-627)129358576 (DE-600)160442-9 (DE-576)014730863 0018-9456 nnns volume:65 year:2016 number:6 pages:1300-1309 http://dx.doi.org/10.1109/TIM.2015.2490358 Volltext http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=7422075 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC GBV_ILN_24 GBV_ILN_30 GBV_ILN_70 GBV_ILN_170 GBV_ILN_2014 GBV_ILN_2061 50.21 AVZ 53.00 AVZ AR 65 2016 6 1300-1309 |
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10.1109/TIM.2015.2490358 doi PQ20160719 (DE-627)OLC197776391X (DE-599)GBVOLC197776391X (PRQ)g1413-bbec8d9d161dd18a8f7b14b99110e63813b55e88daf7f448d9c3897ea206c9320 (KEY)0079426020160000065000601300massmeasurementmethodfortheelectronicbalancebasedo DE-627 ger DE-627 rakwb eng 620 DNB 50.21 bkl 53.00 bkl Huang, Qiang verfasserin aut Mass Measurement Method for the Electronic Balance Based on Continuous-Time Sigma-Delta Modulator 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier An approach to mass measurement for the electronic balance based on continuous-time sigma-delta (CT <inline-formula> <tex-math notation="LaTeX">\Sigma -\Delta </tex-math></inline-formula>) modulator is described in this paper. As an effect of multifarious interfering noises, the accuracy of the electronic balance is restricted. The general idea of this proposed approach is to apply an electromagnetic-force-compensated load cell (EMCC), a related signal processing circuit, and a composite filter. The circuit mainly consists of a proportional-integral-differential controller and a pulsewidth modulator, which combine with the EMCC to form a CT <inline-formula> <tex-math notation="LaTeX">\Sigma -\Delta </tex-math></inline-formula> modulator. As the CT <inline-formula> <tex-math notation="LaTeX">\Sigma -\Delta </tex-math></inline-formula> modulator possesses inherent antialiasing filtering, oversampling, and noise-shaping characteristics, the interfering noises can be effectively removed by the composite filter that is composed of two <inline-formula> <tex-math notation="LaTeX">{\rm sinc}^{N^{^{^{}}} </tex-math></inline-formula> filters. The simulations for both of the electronic balance models adopting the proposed approach and working in conventional pulse current mode are analyzed by adding the white Gaussian noise in Simulink. The simulation results demonstrate the effectiveness of this proposed approach, the proposed electronic balance in the field can improve its signal-to-noise ratio, and the testing results meet the requirement for the weighing accuracy of the special-class scale defined by Organisation Internationale De Métrologie Légale R76 nonautomatic weighing instruments. electromagnetic-force-compensated load cell (EMCC) Continuous-time sigma-delta (CT Σ-Δ) sincN Semiconductor device measurement Pulse width modulation Clocks pulse current Quantization (signal) Current measurement mass measurement electronic balance Noise measurement Continuous-time sigma-delta (CT [sigma]-[delta]) Research Equipment and supplies Signal processing Usage Pulse-duration modulation Teng, Zhaosheng oth Tang, Xiang oth Lin, Haijun oth Wen, He oth Enthalten in IEEE transactions on instrumentation and measurement New York, NY, 1963 65(2016), 6, Seite 1300-1309 (DE-627)129358576 (DE-600)160442-9 (DE-576)014730863 0018-9456 nnns volume:65 year:2016 number:6 pages:1300-1309 http://dx.doi.org/10.1109/TIM.2015.2490358 Volltext http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=7422075 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC GBV_ILN_24 GBV_ILN_30 GBV_ILN_70 GBV_ILN_170 GBV_ILN_2014 GBV_ILN_2061 50.21 AVZ 53.00 AVZ AR 65 2016 6 1300-1309 |
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10.1109/TIM.2015.2490358 doi PQ20160719 (DE-627)OLC197776391X (DE-599)GBVOLC197776391X (PRQ)g1413-bbec8d9d161dd18a8f7b14b99110e63813b55e88daf7f448d9c3897ea206c9320 (KEY)0079426020160000065000601300massmeasurementmethodfortheelectronicbalancebasedo DE-627 ger DE-627 rakwb eng 620 DNB 50.21 bkl 53.00 bkl Huang, Qiang verfasserin aut Mass Measurement Method for the Electronic Balance Based on Continuous-Time Sigma-Delta Modulator 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier An approach to mass measurement for the electronic balance based on continuous-time sigma-delta (CT <inline-formula> <tex-math notation="LaTeX">\Sigma -\Delta </tex-math></inline-formula>) modulator is described in this paper. As an effect of multifarious interfering noises, the accuracy of the electronic balance is restricted. The general idea of this proposed approach is to apply an electromagnetic-force-compensated load cell (EMCC), a related signal processing circuit, and a composite filter. The circuit mainly consists of a proportional-integral-differential controller and a pulsewidth modulator, which combine with the EMCC to form a CT <inline-formula> <tex-math notation="LaTeX">\Sigma -\Delta </tex-math></inline-formula> modulator. As the CT <inline-formula> <tex-math notation="LaTeX">\Sigma -\Delta </tex-math></inline-formula> modulator possesses inherent antialiasing filtering, oversampling, and noise-shaping characteristics, the interfering noises can be effectively removed by the composite filter that is composed of two <inline-formula> <tex-math notation="LaTeX">{\rm sinc}^{N^{^{^{}}} </tex-math></inline-formula> filters. The simulations for both of the electronic balance models adopting the proposed approach and working in conventional pulse current mode are analyzed by adding the white Gaussian noise in Simulink. The simulation results demonstrate the effectiveness of this proposed approach, the proposed electronic balance in the field can improve its signal-to-noise ratio, and the testing results meet the requirement for the weighing accuracy of the special-class scale defined by Organisation Internationale De Métrologie Légale R76 nonautomatic weighing instruments. electromagnetic-force-compensated load cell (EMCC) Continuous-time sigma-delta (CT Σ-Δ) sincN Semiconductor device measurement Pulse width modulation Clocks pulse current Quantization (signal) Current measurement mass measurement electronic balance Noise measurement Continuous-time sigma-delta (CT [sigma]-[delta]) Research Equipment and supplies Signal processing Usage Pulse-duration modulation Teng, Zhaosheng oth Tang, Xiang oth Lin, Haijun oth Wen, He oth Enthalten in IEEE transactions on instrumentation and measurement New York, NY, 1963 65(2016), 6, Seite 1300-1309 (DE-627)129358576 (DE-600)160442-9 (DE-576)014730863 0018-9456 nnns volume:65 year:2016 number:6 pages:1300-1309 http://dx.doi.org/10.1109/TIM.2015.2490358 Volltext http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=7422075 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC GBV_ILN_24 GBV_ILN_30 GBV_ILN_70 GBV_ILN_170 GBV_ILN_2014 GBV_ILN_2061 50.21 AVZ 53.00 AVZ AR 65 2016 6 1300-1309 |
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620 DNB 50.21 bkl 53.00 bkl Mass Measurement Method for the Electronic Balance Based on Continuous-Time Sigma-Delta Modulator electromagnetic-force-compensated load cell (EMCC) Continuous-time sigma-delta (CT Σ-Δ) sincN Semiconductor device measurement Pulse width modulation Clocks pulse current Quantization (signal) Current measurement mass measurement electronic balance Noise measurement Continuous-time sigma-delta (CT [sigma]-[delta]) Research Equipment and supplies Signal processing Usage Pulse-duration modulation |
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mass measurement method for the electronic balance based on continuous-time sigma-delta modulator |
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Mass Measurement Method for the Electronic Balance Based on Continuous-Time Sigma-Delta Modulator |
| abstract |
An approach to mass measurement for the electronic balance based on continuous-time sigma-delta (CT <inline-formula> <tex-math notation="LaTeX">\Sigma -\Delta </tex-math></inline-formula>) modulator is described in this paper. As an effect of multifarious interfering noises, the accuracy of the electronic balance is restricted. The general idea of this proposed approach is to apply an electromagnetic-force-compensated load cell (EMCC), a related signal processing circuit, and a composite filter. The circuit mainly consists of a proportional-integral-differential controller and a pulsewidth modulator, which combine with the EMCC to form a CT <inline-formula> <tex-math notation="LaTeX">\Sigma -\Delta </tex-math></inline-formula> modulator. As the CT <inline-formula> <tex-math notation="LaTeX">\Sigma -\Delta </tex-math></inline-formula> modulator possesses inherent antialiasing filtering, oversampling, and noise-shaping characteristics, the interfering noises can be effectively removed by the composite filter that is composed of two <inline-formula> <tex-math notation="LaTeX">{\rm sinc}^{N^{^{^{}}} </tex-math></inline-formula> filters. The simulations for both of the electronic balance models adopting the proposed approach and working in conventional pulse current mode are analyzed by adding the white Gaussian noise in Simulink. The simulation results demonstrate the effectiveness of this proposed approach, the proposed electronic balance in the field can improve its signal-to-noise ratio, and the testing results meet the requirement for the weighing accuracy of the special-class scale defined by Organisation Internationale De Métrologie Légale R76 nonautomatic weighing instruments. |
| abstractGer |
An approach to mass measurement for the electronic balance based on continuous-time sigma-delta (CT <inline-formula> <tex-math notation="LaTeX">\Sigma -\Delta </tex-math></inline-formula>) modulator is described in this paper. As an effect of multifarious interfering noises, the accuracy of the electronic balance is restricted. The general idea of this proposed approach is to apply an electromagnetic-force-compensated load cell (EMCC), a related signal processing circuit, and a composite filter. The circuit mainly consists of a proportional-integral-differential controller and a pulsewidth modulator, which combine with the EMCC to form a CT <inline-formula> <tex-math notation="LaTeX">\Sigma -\Delta </tex-math></inline-formula> modulator. As the CT <inline-formula> <tex-math notation="LaTeX">\Sigma -\Delta </tex-math></inline-formula> modulator possesses inherent antialiasing filtering, oversampling, and noise-shaping characteristics, the interfering noises can be effectively removed by the composite filter that is composed of two <inline-formula> <tex-math notation="LaTeX">{\rm sinc}^{N^{^{^{}}} </tex-math></inline-formula> filters. The simulations for both of the electronic balance models adopting the proposed approach and working in conventional pulse current mode are analyzed by adding the white Gaussian noise in Simulink. The simulation results demonstrate the effectiveness of this proposed approach, the proposed electronic balance in the field can improve its signal-to-noise ratio, and the testing results meet the requirement for the weighing accuracy of the special-class scale defined by Organisation Internationale De Métrologie Légale R76 nonautomatic weighing instruments. |
| abstract_unstemmed |
An approach to mass measurement for the electronic balance based on continuous-time sigma-delta (CT <inline-formula> <tex-math notation="LaTeX">\Sigma -\Delta </tex-math></inline-formula>) modulator is described in this paper. As an effect of multifarious interfering noises, the accuracy of the electronic balance is restricted. The general idea of this proposed approach is to apply an electromagnetic-force-compensated load cell (EMCC), a related signal processing circuit, and a composite filter. The circuit mainly consists of a proportional-integral-differential controller and a pulsewidth modulator, which combine with the EMCC to form a CT <inline-formula> <tex-math notation="LaTeX">\Sigma -\Delta </tex-math></inline-formula> modulator. As the CT <inline-formula> <tex-math notation="LaTeX">\Sigma -\Delta </tex-math></inline-formula> modulator possesses inherent antialiasing filtering, oversampling, and noise-shaping characteristics, the interfering noises can be effectively removed by the composite filter that is composed of two <inline-formula> <tex-math notation="LaTeX">{\rm sinc}^{N^{^{^{}}} </tex-math></inline-formula> filters. The simulations for both of the electronic balance models adopting the proposed approach and working in conventional pulse current mode are analyzed by adding the white Gaussian noise in Simulink. The simulation results demonstrate the effectiveness of this proposed approach, the proposed electronic balance in the field can improve its signal-to-noise ratio, and the testing results meet the requirement for the weighing accuracy of the special-class scale defined by Organisation Internationale De Métrologie Légale R76 nonautomatic weighing instruments. |
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Mass Measurement Method for the Electronic Balance Based on Continuous-Time Sigma-Delta Modulator |
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