In order to provide a method for accurately detecting the concentration and types of heavy metal ions in water,a fluid ion detection system is designed.It consists of a side-polished fiber-assisted fluid structure and...In order to provide a method for accurately detecting the concentration and types of heavy metal ions in water,a fluid ion detection system is designed.It consists of a side-polished fiber-assisted fluid structure and a long-period fiber grating(LPFG)coated with a metal chelating agent membrane.In this study,both theoretical and experimental investigations are conducted to examine the sensing characteristics of the system towards copper ion and iron ion solutions.The results demonstrate that under the premise of ensuring solution flow,the system can achieve specific identification of different types of heavy metal ions.Furthermore,it exhibits concentration sensing sensitivities of 9.23×10^(4) mL·nm/mol and 7.13×10^(4) mL·nm/mol for copper sulfate(CuSO_(4))and ferric chloride(FeCl_(3))solutions,respectively.Therefore,this sensing system offers the potential for real-time detection of metal ions.展开更多
In this paper, a method of measuring roll angle with hollow cube corner reflector(HCCR) is proposed. Firstly, the space coordinate vector relationship between the mirror and the autocollimator is established by using ...In this paper, a method of measuring roll angle with hollow cube corner reflector(HCCR) is proposed. Firstly, the space coordinate vector relationship between the mirror and the autocollimator is established by using the Euler rotation relationship, and the structure of the HCCR is designed. Secondly, through the actual measurement of the HCCR reflector’s angle sensitivity, the specific formula of roll angle measurement is obtained. The experimental results show that the method can be used to measure the roll angle, and the maximum root mean square(RMS) error is 15" in the range of 350", and the repeatability of the experiment is better than 2.7". On the basis of retaining the traditional autocollimator, the plane mirror is replaced with HCCR, which realizes the measurement of the roll angle of the autocollimator. This method does not change the internal structure of the autocollimator system, and there is no process error caused by special processing technology, so as to retain the autocollimator’s own long measurement distance, high measurement accuracy, high system stability, and large range of measurement performance, and it can also be used in industrial production.展开更多
A photoelectric autocollimator with high accuracy and extended measurement range based on the quadrangular pyramid is proposed,and the corresponding algorithms are also deduced.A new image processing algorithm has bee...A photoelectric autocollimator with high accuracy and extended measurement range based on the quadrangular pyramid is proposed,and the corresponding algorithms are also deduced.A new image processing algorithm has been proposed to improve the accuracy,and the corresponding errors are also estimated,the error does not exceed half a pixel when the distance between the marks more than two radii.The experimental results have verified that the measurement range of the proposed two-dimensional(2D)quadrangular pyramid photoelectric autocollimator can be increased 2 times than that of the flat mirror photoelectric autocollimator from 10′to 15′.The accuracy is better than 1″when the deflection is less than 15′.展开更多
A biological solution concentration sensor based on a side-polished fiber(SPF)assisted fluid system is presented.The birefringence properties of the asymmetrically filled fluid in this structure and the relationship b...A biological solution concentration sensor based on a side-polished fiber(SPF)assisted fluid system is presented.The birefringence properties of the asymmetrically filled fluid in this structure and the relationship between the concentration of the biological solution and the refractive index are theoretically analyzed.It was found that the interference peaks had red-shifted with increasing concentration.A sensing sensitivity of 1.3871×10^(4)nm·mL/mol at 14.68×10^(-4)mol/mL was achieved within the experimental range after different concentrations of arginine solutions were injected into the sensing system.This sensing system can also be applied to measure the concentration of other biological solutions,providing the feasibility of real-time detection of biological solutions.展开更多
Railway departments in various countries are looking for a technology with convenient operation,low price,excellent measurement performance and stability for spatial position measurement of railway track.Therefore,we ...Railway departments in various countries are looking for a technology with convenient operation,low price,excellent measurement performance and stability for spatial position measurement of railway track.Therefore,we design an optic-electronics stereo system based on the principle of optical stereo measurement.The experimental verification in the real railway environment shows that the performance of the system is that the longitudinal relative displacement measurement range is 200—10000 mm,the relative distance measurement range is 4500 mm and the measured root mean square(RMS)error value is less than 1.1 mm in the whole process.Therefore,it meets the relevant needs of the Russian Ministry of railways.展开更多
基金supported by the National Natural Science Foundation of China(Nos.61705027,62005033,11704053 and 52175531)the Basic Research Project of Chongqing Science and Technology Commission(No.CSTC-2020jcyj-msxm0603)the Science and Technology Research Program of Chongqing Municipal Education Commission(No.KJQN202000609 and KJZD-M202000602)。
文摘In order to provide a method for accurately detecting the concentration and types of heavy metal ions in water,a fluid ion detection system is designed.It consists of a side-polished fiber-assisted fluid structure and a long-period fiber grating(LPFG)coated with a metal chelating agent membrane.In this study,both theoretical and experimental investigations are conducted to examine the sensing characteristics of the system towards copper ion and iron ion solutions.The results demonstrate that under the premise of ensuring solution flow,the system can achieve specific identification of different types of heavy metal ions.Furthermore,it exhibits concentration sensing sensitivities of 9.23×10^(4) mL·nm/mol and 7.13×10^(4) mL·nm/mol for copper sulfate(CuSO_(4))and ferric chloride(FeCl_(3))solutions,respectively.Therefore,this sensing system offers the potential for real-time detection of metal ions.
基金supported by the National Key R&D Program of China(No.2020YFC200330)the National Natural Science Foundation of China(No.62005033)+2 种基金the Basic Research Project of Chongqing Science and Technology Commission(No.CSTC-2020jcyj-msxm0603)the Science and Technology Research Program of Chongqing Municipal Education Commission(No.KJQN202000609)the Science and Technology Research Project of Chongqing Science and Technology Commission(No.KJZD-M202000602).
文摘In this paper, a method of measuring roll angle with hollow cube corner reflector(HCCR) is proposed. Firstly, the space coordinate vector relationship between the mirror and the autocollimator is established by using the Euler rotation relationship, and the structure of the HCCR is designed. Secondly, through the actual measurement of the HCCR reflector’s angle sensitivity, the specific formula of roll angle measurement is obtained. The experimental results show that the method can be used to measure the roll angle, and the maximum root mean square(RMS) error is 15" in the range of 350", and the repeatability of the experiment is better than 2.7". On the basis of retaining the traditional autocollimator, the plane mirror is replaced with HCCR, which realizes the measurement of the roll angle of the autocollimator. This method does not change the internal structure of the autocollimator system, and there is no process error caused by special processing technology, so as to retain the autocollimator’s own long measurement distance, high measurement accuracy, high system stability, and large range of measurement performance, and it can also be used in industrial production.
基金supported by the National Key R&D Program of China(No.2020YFC2003301)the National Natural Science Foundation of China(Nos.62005033,61705027,11704053,51902037 and 61901069)+2 种基金the Government of the Russian Federation(No.08-08)the Basic Research Project of Chongqing Science and Technology Commission(No.CSTC-2020jcyj-msxm0603)the Science and Technology Research Program of Chongqing Municipal Education Commission(No.KJQN202000609)。
文摘A photoelectric autocollimator with high accuracy and extended measurement range based on the quadrangular pyramid is proposed,and the corresponding algorithms are also deduced.A new image processing algorithm has been proposed to improve the accuracy,and the corresponding errors are also estimated,the error does not exceed half a pixel when the distance between the marks more than two radii.The experimental results have verified that the measurement range of the proposed two-dimensional(2D)quadrangular pyramid photoelectric autocollimator can be increased 2 times than that of the flat mirror photoelectric autocollimator from 10′to 15′.The accuracy is better than 1″when the deflection is less than 15′.
基金supported by the National Natural Science Foundation of China(Nos.61705027,62005033,11704053 and 52175531)the Basic Research Project of Chongqing Science and Technology Commission(No.CSTC-2020jcyj-msxm0603)the Science and Technology Research Program of Chongqing Municipal Education Commission(No.KJQN202000609)。
文摘A biological solution concentration sensor based on a side-polished fiber(SPF)assisted fluid system is presented.The birefringence properties of the asymmetrically filled fluid in this structure and the relationship between the concentration of the biological solution and the refractive index are theoretically analyzed.It was found that the interference peaks had red-shifted with increasing concentration.A sensing sensitivity of 1.3871×10^(4)nm·mL/mol at 14.68×10^(-4)mol/mL was achieved within the experimental range after different concentrations of arginine solutions were injected into the sensing system.This sensing system can also be applied to measure the concentration of other biological solutions,providing the feasibility of real-time detection of biological solutions.
基金supported by the National Natural Science Foundation of China(No.62005033)the Government of the Russian Federation(08-08)+1 种基金the Basic Research Project of Chongqing Science and Technology Commission(No.CSTC-2020jcyj-msxm0603)the Science and Technology Research Program of Chongqing Municipal Education Commission(No.KJQN202000609)。
文摘Railway departments in various countries are looking for a technology with convenient operation,low price,excellent measurement performance and stability for spatial position measurement of railway track.Therefore,we design an optic-electronics stereo system based on the principle of optical stereo measurement.The experimental verification in the real railway environment shows that the performance of the system is that the longitudinal relative displacement measurement range is 200—10000 mm,the relative distance measurement range is 4500 mm and the measured root mean square(RMS)error value is less than 1.1 mm in the whole process.Therefore,it meets the relevant needs of the Russian Ministry of railways.
