Evaluation of measurement uncertainty of HMP155A humidity sensor based on correlation analysis of input quantitiesWei, Mingming; Wen, Chunhua; Li, Changchun
doi: 10.1088/1742-6596/2226/1/012011pmid: N/A
In view of the current situation that when the humidity sensor used GUM to evaluate the measurement uncertainty, the correlation between the input quantities was not analyzed. We taked the measurement result of the HMP155A humidity sensor at 55% RH as the research object, and analyzed the correlation of its input quantities. After compatibility judgment and calculation of correlation coefficients, the correlation degree was quantified. The evaluation results show that the extended uncertainty of the forward and reverse stroke are both 1.2%RH. The research results show that the measurement uncertainty deviated when the correlation between input quantities was not analyzed, which can easily lead to errors in the determination of instrument conformity. Using this method can effectively make up for the lack of correlation analysised in GUM’s evaluation of humidity sensors in the past, the evaluation content is closer to reality, and the evaluation results are more true and reliable.
Conference Papers based on the ICOEO Conference held in Xi’an, China 2021doi: 10.1088/1742-6596/2226/1/011001pmid: N/A
The 2nd edition of the International Congress on Optics, Electronics, and Optoelectronics (ICOEO-2021) has been postponed to March, 2022 due to the outbreak of covid-19. Fortunately, the paper work operated very well and it has finished three months in advance.One of the main objectives of the ICOEO-2021 is to strength the research in the fields of optics, electronics, and optoelectronics. In particular the cooperation between researchers, scientists, company executives and government officials shall be facilitated. ICOEO-2021 will be held from the 25th March to 27th March, 2022 in the historic City of Xi’an, China. It will attract more than 200 participants and over 70 speakers via onsite and online meetings from all over the world.
Recognition of Foodborne Pathogens Terahertz Spectrum Based on Convolutional Neural NetworkZeng, Wandan; Wang, Qi; Wu, Chengwei; Hang, Mangmang; Huang, Zhongmin; Huang, Jielun; Xia, Zhiping
doi: 10.1088/1742-6596/2226/1/012012pmid: N/A
Foodborne pathogenic bacteria detection is an important work, the traditional laboratory identification method, will cause irreversible damage to the sample, and the detection cycle is long. Compared with traditional biological detection methods, the greatest advantage of terahertz spectroscopy detection is that it can do non-destructive detection of samples, and terahertz spectroscopy technology, combined with computer systems, can reduce analysis time, improve recognition accuracy, and maximize the extraction and mining of effective information in the spectrum. This paper establishes an intelligent foodborne pathogenic bacteria terahertz spectroscopic recognition model, The results showed that the recognition accuracy of pathogens was 99.76%.
Peer Review Statementdoi: 10.1088/1742-6596/2226/1/011002pmid: N/A
All papers published in this volume have been reviewed through processes administered by the Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing.• Type of peer review: Double Anonymous• Conference submission management system: Morressier• Number of submissions received: 16• Number of submissions sent for review: 0• Number of submissions accepted: 15• Acceptance Rate (Submissions Accepted / Submissions Received × 100): 93.8• Average number of reviews per paper: 0• Total number of reviewers involved: 0• Contact person for queries:Name: Zhi LiEmail: [email protected]: International Science and Technology Conference Institute - Business
Study of Self-healing Behavior for Airy Beams in Atmospheric TurbulenceLin, Haibo; Wang, Jinbao
doi: 10.1088/1742-6596/2226/1/012003pmid: N/A
The Airy beam shows its peculiar property of self-healing which attracts lots of attentions to do the researches about the higher dimensional nondiffraction beams which can apply to lots of aspects to doing researches. We demonstrate the self-healing property of Airy beam which displays similar profiles both in weak and strong turbulence in atmosphere. Highly similarity has been shown when the propagation distance is not very long. The self-healing exhibits its own profile in strong turbulence and stability in weak turbulence respectively with the longer propagation distance. However, the variation of exponential truncation factors and the transverse scales would not change the conclusion that the self-healing property would vanish at the same propagation distance both in weak and strong turbulence. It means that they would reach zero intensity plane with the same self-healing critical distance zsand would not entirely disappear until reach the same disappearance critical distance zd. This study provide a method to enhance the self-healing property of Airy beams.
The temperature difference method for screening patients with COVID-19 fever symptomsZeng, Zhiwei; Mei, Guangdong; Liao, Tingdi; huang, Yantang
doi: 10.1088/1742-6596/2226/1/012010pmid: N/A
Coronavirus disease (COVID-19), caused by the SARS-CoV-2 virus, is a potentially fatal disease of global public health concern. Fever has been reported to be a common clinical symptom in COVID-19 and current CDC recommendations for mitigation of community COVID-19 transmission include temperature screening, so prompting widespread temperature screening across multiple sectors, including hospitals, office buildings and airports. The need for no-contact and rapid measurement of body temperature during the COVID-19 pandemic emergency has led to the widespread use of thermal imaging cameras. However, the body temperature measurement is also disturbed by the environment factors, including ambient temperature, background light etc. When the ambient temperature is low, the temperature of the patient will also be low. It was difficult to screen the fever patients by using the absolute temperature criteria, and it often result in missing detection. In order to solve this problem, this paper proposed a method of screening COVID-19 symptom fever patients by the body temperature difference detection. The temperature difference detection method combined the temperature measurement of the infrared imaging camera and the visible camera face recognition. This method will eliminate environmental interference and equipment errors, to reduce the probability of the fever missed detection.
Creating a Sensor Tier for the EMULSION IoT Platform with Low-Cost Electronic ModulesGanchev, Ivan; Ji, Zhanlin
doi: 10.1088/1742-6596/2226/1/012009pmid: N/A
This paper presents some of the designed and experimentally-tested low-cost electronic modules, utilized for the creation of a sensor tier for the generic, multi-service, cloud-based operational platform EMULSION, which is being elaborated for rapid building of mobile Internet of Things (IoT) systems and roll-out of corresponding IoT services. The next step is to achieve full integration of the designed modules with various other existing components with different processing and communication capabilities, as to allow 1,000,000 heterogeneous IoT nodes, deployed at the sensor tier of the platform, to communicate simultaneously online within a single EMULSION cluster.
Low-noise amplification of voltage response for thermopile optical detectorsLi, Chaochen; Zhao, Yaru; Deng, Yuqiang; Xu, Tao
doi: 10.1088/1742-6596/2226/1/012001pmid: N/A
A technique is presented to amplify the voltage response of thermopile optical detectors. It is based on the parallel combination of multiple operational amplifiers. The background noise of the voltage response has been deceased, which significantly improves the repeatability of the measurement results. Thus, this technique enables the same detector to measure weaker optical power or irradiance at the same precision level. The corresponding amplifying circuit is designed and fabricated. For the same detector, the experimental results show that the standard deviation of the background noise of the combined n op-amps is about 1/nlower comparing with the conventional single op-amp scheme, which is consistent with the theoretical expectations. Furthermore, the lasers of 10 μW and 1μW were also measured by the specific detector and the amplifier circuit. For a 10 μW response, the measurement repeatability of the 8-combined op-amps is about 1.4%, which is better than the 3.3% of a single op-amp. For 1 μW laser, the measurement result of voltage response of the 8-combined op-amps can be precisely quantified; however, the result of the single op-amp is hardly distinguished. The presented technique based on multiple op-amps is practical and can be potential in many applications. We hope this technique could offer help for expanding the measurement ranges of thermopile optical detectors at weaker optical power and irradiance.
High density and uniformity 1300 nm InAs/GaAs quantum dots grown on silicon substrate through molecular beam epitaxyHao, H M; Su, X B; Liu, H Q; Shang, X J; Ni, H Q; Niu, Z C
doi: 10.1088/1742-6596/2226/1/012006pmid: N/A
The integration of III/V materials into silicon-based microelectronics has been the momentum in the development progress of silicon photonics in the past few decades. In this paper, the growth of InAs/GaAs quantum dots with the high density of 6.5 × 1010/cm2 on silicon substrate is demonstrated. The influence of different deposition amount of indium on the density of quantum dots under the same arsenic flux pressure is discussed in detail, from 2.21 monolayer, 2.38 monolayer to 2.55 monolayer. Atomic force microscopy measurement and photoluminescence test are conducted to characterize the materials growth. The InAs/GaAs quantum dots exhibit the best dot density and size uniformity as well as the strongest intensity of photoluminescence at the deposition amount of 2.38 monolayer. This result provides stable foundation for the realization of III/V quantum dot materials as the photonic components into silicon-based lasers.
An optical apparatus for inspecting adjacent surfaces defects of TEC components with equal-optical-path confocal imaging using optical wedge prismsShaobin, Yan; Yafan, Duan; Qilu, Huang; Heng, Zheng; Yantang, Huang; Tingdi, Liao
doi: 10.1088/1742-6596/2226/1/012005pmid: N/A
An optical apparatus with equal-optical-path confocal imaging has been proposed for simultaneously inspecting adjacent surfaces defects of thermoelectric cooler (TEC) components. The equal-optical-path confocal imaging of two adjacent surfaces with the desired separation can be obtained by using two optical wedges in the two optical imaging paths respectively. The optical apparatus has been designed and experimental investigations on defects inspection of two adjacent surfaces of TEC components have been conducted. The results showed that the proposed optical apparatus allows one to simultaneously inspect the defects of adjacent surfaces of TEC components. It was concluded that the optical apparatus can meet the technical requirements for inspecting adjacent surfaces defects of TEC components. The apparatus has advantages of freedom for imaging adjustment, increased inspection accuracy and improved system reliability etc. It has been found applications in the intelligent defects inspection system of TEC components.