The Cooling Storage Ring of the Heavy Ion Research Facility in Lanzhou(HIRFL-CSR)was constructed to study nuclear physics,atomic physics,interdisciplinary science,and related applications.The External Target Facility(...The Cooling Storage Ring of the Heavy Ion Research Facility in Lanzhou(HIRFL-CSR)was constructed to study nuclear physics,atomic physics,interdisciplinary science,and related applications.The External Target Facility(ETF)is located in the main ring of the HIRFL-CSR.The gamma detector of the ETF is built to measure emitted gamma rays with energies below 5 MeV in the center-of-mass frame and is planned to measure light fragments with energies up to 300 MeV.The readout electronics for the gamma detector were designed and commissioned.The readout electronics consist of thirty-two front-end cards,thirty-two readout control units(RCUs),one common readout unit,one synchronization&clock unit,and one sub-trigger unit.By using the real-time peak-detection algorithm implemented in the RCU,the data volume can be significantly reduced.In addition,trigger logic selection algorithms are implemented to improve the selection of useful events and reduce the data size.The test results show that the integral nonlinearity of the readout electronics is less than 1%,and the energy resolution for measuring the 60 Co source is better than 5.5%.This study discusses the design and performance of the readout electronics.展开更多
To realize the highly precise and real-time monitoring of seeding performance in suction-type corn planter,and intelligent detection technology was presented.In this monitoring system,firstly,the sensor was designed b...To realize the highly precise and real-time monitoring of seeding performance in suction-type corn planter,and intelligent detection technology was presented.In this monitoring system,firstly,the sensor was designed based on the photoelectric technology.Meanwhile,in order to reduce the influence of dust in the field on the photoelectric sensor,the installation position of the sensor was changed to the space under the seed plate instead of the traditional position,that is,the middle of the seed tube.Secondly,the scattering angle of the highlighting light-emitting diodes was considered to calculate the spacing of transmitters to realize non-blind area detection.Last but not least,the peak-detection algorithm was utilized to increase the detection accuracy.Therefore,after a lot of the indoor and field experiments,the analysis shows that the detection accuracy of seeding quantity can reach 98.45%,alarm delay time under abnormal circumstances is not more than 2 s.Obviously,this system can meet the requirements of seeding completely and improve its reliability greatly.展开更多
基金supported by the National Natural Science Foundation of China (Nos. 12222512, 12375193, U2031206, U1831206, and U2032209)the Scientific Instrument Developing Project of the Chinese Academy of Sciences (GJJSTD20210009)+1 种基金the CAS Pioneer Hundred Talent Programthe CAS Light of West China Program
文摘The Cooling Storage Ring of the Heavy Ion Research Facility in Lanzhou(HIRFL-CSR)was constructed to study nuclear physics,atomic physics,interdisciplinary science,and related applications.The External Target Facility(ETF)is located in the main ring of the HIRFL-CSR.The gamma detector of the ETF is built to measure emitted gamma rays with energies below 5 MeV in the center-of-mass frame and is planned to measure light fragments with energies up to 300 MeV.The readout electronics for the gamma detector were designed and commissioned.The readout electronics consist of thirty-two front-end cards,thirty-two readout control units(RCUs),one common readout unit,one synchronization&clock unit,and one sub-trigger unit.By using the real-time peak-detection algorithm implemented in the RCU,the data volume can be significantly reduced.In addition,trigger logic selection algorithms are implemented to improve the selection of useful events and reduce the data size.The test results show that the integral nonlinearity of the readout electronics is less than 1%,and the energy resolution for measuring the 60 Co source is better than 5.5%.This study discusses the design and performance of the readout electronics.
基金We acknowledge that this work was financially supported by Three Horizontal-Three Vertical Support Project of Heilongjiang Bayi Agricultural University(TDJH201803)Key Scientific Research Project of Heilongjiang Agricultural Reclamation Bureau(HNK135-06-08).
文摘To realize the highly precise and real-time monitoring of seeding performance in suction-type corn planter,and intelligent detection technology was presented.In this monitoring system,firstly,the sensor was designed based on the photoelectric technology.Meanwhile,in order to reduce the influence of dust in the field on the photoelectric sensor,the installation position of the sensor was changed to the space under the seed plate instead of the traditional position,that is,the middle of the seed tube.Secondly,the scattering angle of the highlighting light-emitting diodes was considered to calculate the spacing of transmitters to realize non-blind area detection.Last but not least,the peak-detection algorithm was utilized to increase the detection accuracy.Therefore,after a lot of the indoor and field experiments,the analysis shows that the detection accuracy of seeding quantity can reach 98.45%,alarm delay time under abnormal circumstances is not more than 2 s.Obviously,this system can meet the requirements of seeding completely and improve its reliability greatly.
