Measurement最新文献_第3页

Research on qualitative identification of equivalent wave based on underwater micro-triboelectric sensing method 基于水下微三电传感方法的等效波定性识别研究

IF 5.2 2区工程技术

Measurement Pub Date : 2024-11-24 DOI: 10.1016/j.measurement.2024.116309

Peng Yi , Qingbing Wei , Yong Fan , Baoping Cai , Chao Wang , Xueliang Pei , Zhe Li

{"title":"Research on qualitative identification of equivalent wave based on underwater micro-triboelectric sensing method","authors":"Peng Yi , Qingbing Wei , Yong Fan , Baoping Cai , Chao Wang , Xueliang Pei , Zhe Li","doi":"10.1016/j.measurement.2024.116309","DOIUrl":"10.1016/j.measurement.2024.116309","url":null,"abstract":"<div><div>Ocean exploration and underwater monitoring are becoming increasingly vital due to the abundant biological, mineral, energy, and other resources in the ocean. In this paper, a triboelectric nanogenerator (TENG) based on laser processing technology is proposed for underwater monitoring of mechanical motion/triggering as well as signal screening. A self-powered wave sensing unit with a stable electrical output is fabricated by means of a new performance enhancement method for dielectric friction materials combined with an external flexible waterproof encapsulated housing. The unit can accurately respond to a variety of external mechanical stimuli. More precisely, it can analyze three basic elements of waves: frequency, amplitude and waveform. We construct a wave equivalent testing platform and perform equivalent wave tests on the sensing unit to realize sensing and analysis of wave information. We also explore the response time of the sensing unit to changes in the wave conditions. The developed self-powered sensing unit based on the TENG technology is not only low-cost and has a simple structure, but is also accurate and stable. Finally, the proposed work provides new ideas for future seabed exploration and ocean monitoring.</div></div>","PeriodicalId":18349,"journal":{"name":"Measurement","volume":"242 ","pages":"Article 116309"},"PeriodicalIF":5.2,"publicationDate":"2024-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142722532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Training techniques and enhanced kinematic modeling for extended range twisted string actuators

IF 5.2 2区工程技术

Measurement Pub Date : 2024-11-24 DOI: 10.1016/j.measurement.2024.116286

Junyeong Lee , Jinuk Kwon , Joowon Park , Gyumin Kim , Hyeondo Kim , Sukho Park

{"title":"Training techniques and enhanced kinematic modeling for extended range twisted string actuators","authors":"Junyeong Lee , Jinuk Kwon , Joowon Park , Gyumin Kim , Hyeondo Kim , Sukho Park","doi":"10.1016/j.measurement.2024.116286","DOIUrl":"10.1016/j.measurement.2024.116286","url":null,"abstract":"<div><div>As a linear actuator, the twisted string actuator (TSA) offers ease of miniaturization, flexibility, and the capability to exert a strong actuation force, due to its large gear ratio. Owing to these characteristics, TSA has recently gained attention as a suitable small actuator for wearable devices, and surgical robots. However, the operating range relative to its size has been reported as limited. This study aims to overcome this limitation by extending the operating range of TSA using the coiling phase, following the twisting phase. To achieve this, we first analyze the training process to effectively mitigate the irregular overlapping phenomena in the coiling stage of TSA, considering the hysteresis and the training effect of TSA under different loads. Second, we address the limitations of conventional TSA kinematic models and propose an improved kinematic model for the extended operating range of TSA. Specifically, this study presents the precise transition points between the twisting and coiling phases of TSA and proposes enhanced analytical models for each phase. Finally, through various experiments, we validate the proposed training process and kinematic model for extended TSA operation. It is expected that the proposed training process and kinematic model for TSA will enable precise actuation within the extended operating range, facilitating a wider array of applications.</div></div>","PeriodicalId":18349,"journal":{"name":"Measurement","volume":"243 ","pages":"Article 116286"},"PeriodicalIF":5.2,"publicationDate":"2024-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142743590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design and application of a new high-performance flexible six-axis force/torque sensor for massage therapy

IF 5.2 2区工程技术

Measurement Pub Date : 2024-11-24 DOI: 10.1016/j.measurement.2024.116312

Lu Liu , Xiaoli Jia , Qingyu Yang , Jinglong Zhang , Liaoliang Ke , Jie Yang , Sritawat Kitipornchai

引用次数: 0

Embedded YOLO v8: Real-time detection of sugarcane nodes in complex natural environments by rapid structural pruning method

IF 5.2 2区工程技术

Measurement Pub Date : 2024-11-23 DOI: 10.1016/j.measurement.2024.116291

Shanshan Hu , Guoxin Tang , Kang Yu , Wen Chen , Zhiwei Wang

{"title":"Embedded YOLO v8: Real-time detection of sugarcane nodes in complex natural environments by rapid structural pruning method","authors":"Shanshan Hu , Guoxin Tang , Kang Yu , Wen Chen , Zhiwei Wang","doi":"10.1016/j.measurement.2024.116291","DOIUrl":"10.1016/j.measurement.2024.116291","url":null,"abstract":"<div><div>In the exploring of sugarcane intelligent harvesting technology, the target detection task of sugarcane node faces serious challenges on low detection accuracy affected by complex natural environment and the time-consuming task to lightweight algorithm structure. In addition, the classical target detection model, such as YOLO (You Only Look Once), with requirement of huge computationally ability puts huge computing pressure to the embedded device for sugarcane nodes detection. In order to solve these problems, this study proposed an improved YOLOv8n-ghost, which adopted Ghost module to build lightweight network and reduce model redundancy while ensuring performance. The dataset was extended and diversified by data classification and enhancement to increasing the robustness and generalization ability of the model. The structured pruning method based on DepGraph (Dependency Graph) was adopted to compress the optimized model, which greatly reduced the complexity of the model. To reduce experimentation time and computational cost, a rapid method for the optimal pruning rate was proposed by combination of big-small step size to quickly achieve the optimal pruning rate with shorter experiment time and satisfied accuracy. By comparison of different pruning methods and lightweight methods, the AP (Average Precision) of model Pruned 65 %-YOLOv8n-ghost was > 90 % with only 0.53 M parameters and 2.2G FLOPs. Finally, the model was accelerated with TensorRT and tested in the embedded device. The real-time speed of the improved model approached 30 frames per second, which was 200 % higher than before and met the requirements of real-time detection of sugarcane node.</div></div>","PeriodicalId":18349,"journal":{"name":"Measurement","volume":"242 ","pages":"Article 116291"},"PeriodicalIF":5.2,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multi-architecture optimization of pipeline inner wall defect detection algorithm based on YOLOv8 基于 YOLOv8 的管道内壁缺陷检测算法的多架构优化

IF 5.2 2区工程技术

Measurement Pub Date : 2024-11-23 DOI: 10.1016/j.measurement.2024.116305

Qian Zhao, Gaojuan Wang

引用次数: 0

Low-temperature-crosstalk humidity fiber sensor based on a thermal expansion-resistant Fabry-Perot interferometer 基于耐热膨胀法布里-珀罗干涉仪的低温串扰湿度光纤传感器

IF 5.2 2区工程技术

Measurement Pub Date : 2024-11-23 DOI: 10.1016/j.measurement.2024.116302

Haiming Qiu , Mengxuan Zhu , Shuji Mo , Ying Gao , Yong Yao , Yongkang Dong , Jiajun Tian

{"title":"Low-temperature-crosstalk humidity fiber sensor based on a thermal expansion-resistant Fabry-Perot interferometer","authors":"Haiming Qiu , Mengxuan Zhu , Shuji Mo , Ying Gao , Yong Yao , Yongkang Dong , Jiajun Tian","doi":"10.1016/j.measurement.2024.116302","DOIUrl":"10.1016/j.measurement.2024.116302","url":null,"abstract":"<div><div>A low-temperature-crosstalk fiber-optic humidity sensor based on a thermal expansion-resistant Fabry-Pérot interferometer (FPI) has been proposed. This sensor is constructed by cascading a single-mode fiber, a hollow core fiber, an air-clad photonic crystal fiber (APCF), and a polyimide microrod. The two mirrors of FPI are composed of the end faces of single-mode optical fiber and polyimide microrod (located on the end face of APCF). Thus, hollow core fiber thermal expansion will offset the change in FPI length caused by polyimide microrod thermal expansion, thereby achieving low temperature sensitivity. In contrast, an increase in humidity causes the polyimide microrod to absorb moisture and swell, resulting in a shortening of the FPI. Experimentally, the sensor’s humidity sensitivity between 30 % RH and 80 % RH and temperature sensitivity between 20 °C and 200 °C are 203.1 pm/% RH and 0.95 pm/°C, respectively. With a temperature cross-sensitivity as low as 0.0047 % RH/°C. This article provided a novel solution for achieving low temperature cross sensitivity in humidity sensors.</div></div>","PeriodicalId":18349,"journal":{"name":"Measurement","volume":"242 ","pages":"Article 116302"},"PeriodicalIF":5.2,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142701533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An enhanced manifold alignment method for fault diagnosis of liquid-cooled plate based on manifold distance features

IF 5.2 2区工程技术

Measurement Pub Date : 2024-11-23 DOI: 10.1016/j.measurement.2024.116303

Xiaoping Liu , Chen Shang , Wei Wang , Mingmin Wu , Hong Bao

{"title":"An enhanced manifold alignment method for fault diagnosis of liquid-cooled plate based on manifold distance features","authors":"Xiaoping Liu , Chen Shang , Wei Wang , Mingmin Wu , Hong Bao","doi":"10.1016/j.measurement.2024.116303","DOIUrl":"10.1016/j.measurement.2024.116303","url":null,"abstract":"<div><div>The application of data-driven fault diagnosis in structural health monitoring (SHM) encounters several challenges. One major obstacle is obtaining a large quantity of accurate fault samples in certain scenarios. Additionally, the complexity of working environments exacerbates the difficulty of diagnostics due to significant distribution disparities among samples from different environments. This paper proposes a manifold alignment method based on manifold distance features (MDFMA), aiming to address the issue of insufficient fault samples during the fault diagnosis process. Initially, a simulated physical model of the monitoring object is established to generate a large number of simulated fault samples. These are supplemented with a small number of actual fault samples and then merged into a training dataset. Subsequently, the training samples undergo reconstruction employing the shortest manifold distance feature. Then the cosine similarity (COS) measuring method is applied to calculate the similarity between simulated and actual samples, thereby facilitating cross-domain feature alignment. Finally, all sample points are projected into the labeled space, and the manifold alignment (MA) method is employed to predict the state of the monitoring subject. The experiments conducted on the liquid-cooled plate confirmed the effectiveness and feasibility of the proposed method. The results demonstrate that this approach exhibits superior robustness and applicability in practical applications compared to other manifold alignment methods.</div></div>","PeriodicalId":18349,"journal":{"name":"Measurement","volume":"242 ","pages":"Article 116303"},"PeriodicalIF":5.2,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

mL-level low gas consumption PAS sensor for dual gases CH4/C2H2 detection based on an optimized TT-type resonator 基于优化 TT 型谐振器的毫升级低气耗 PAS 传感器，用于检测 CH4/C2H2 两种气体

IF 5.2 2区工程技术

Measurement Pub Date : 2024-11-23 DOI: 10.1016/j.measurement.2024.116288

Fupeng Wang , Liyan Fu , Jianguo Zhang , Jiachen Sun , Ze Han , Shuo Pang , Qingsheng Xue , Diansheng Cao , Qian Li , Qiang Wang

{"title":"mL-level low gas consumption PAS sensor for dual gases CH4/C2H2 detection based on an optimized TT-type resonator","authors":"Fupeng Wang , Liyan Fu , Jianguo Zhang , Jiachen Sun , Ze Han , Shuo Pang , Qingsheng Xue , Diansheng Cao , Qian Li , Qiang Wang","doi":"10.1016/j.measurement.2024.116288","DOIUrl":"10.1016/j.measurement.2024.116288","url":null,"abstract":"<div><div>The miniaturization of photoacoustic (PA) cell is an important and practical direction for the area of photoacoustic spectroscopy (PAS) trace gas detection to save sample consumption. In this study, a CH<sub>4</sub>/C<sub>2</sub>H<sub>2</sub> PAS sensor with gas consumption of only 1.1 mL is developed for the purpose of transformer oil diagnosis. A new TT-type resonator is proposed and optimized to design the PA cell with characteristics of easy integration, low gas consumption, differential detection, and photoacoustic enhancement. The special design of TT-type resonator allows us to install the microphones at the resonant center of the acoustic field, which avoids the probing loss when inserting the microphones as in conventional Helmholtz cell. Based on the experimental results, a good linearity of R<sup>2</sup> better than 0.999 is achieved for both CH<sub>4</sub> and C<sub>2</sub>H<sub>2</sub> in a full concentration range of 0–5000 ppm. The noise equivalent sensitivity is evaluated to be 0.25 ppm and 77 ppb for CH<sub>4</sub> and C<sub>2</sub>H<sub>2</sub> respectively. In addition, the noise source, gas exchanging efficiency and improvement potential of the TT-type resonator are also analyzed in this study.</div></div>","PeriodicalId":18349,"journal":{"name":"Measurement","volume":"242 ","pages":"Article 116288"},"PeriodicalIF":5.2,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142701532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis on identifying thin-plate void parameters in concrete based on vibro-acoustic method 基于振动声学方法的混凝土薄板空隙参数识别分析

IF 5.2 2区工程技术

Measurement Pub Date : 2024-11-23 DOI: 10.1016/j.measurement.2024.116281

Yong Yang, Weigang Zhao

引用次数: 0

Signal flux and time-of-flight estimation based on waveform optimization for single-photon LiDAR 基于单光子激光雷达波形优化的信号通量和飞行时间估算

IF 5.2 2区工程技术

Measurement Pub Date : 2024-11-22 DOI: 10.1016/j.measurement.2024.116239

Linjie Lyu , Duan Li , Tengfei Wu , Qinggai Mi , Yanhong Jiang , Lijun Xu

{"title":"Signal flux and time-of-flight estimation based on waveform optimization for single-photon LiDAR","authors":"Linjie Lyu , Duan Li , Tengfei Wu , Qinggai Mi , Yanhong Jiang , Lijun Xu","doi":"10.1016/j.measurement.2024.116239","DOIUrl":"10.1016/j.measurement.2024.116239","url":null,"abstract":"<div><div>Single-photon LiDAR is widely used for target detection and 3D imaging. Traditional flux inversion methods, which count the echo photons of the signal, struggle with high signal fluxes due to dead time and a detection probability close to 100 %. This paper presents a new approach that uses the temporal information of the echo photons to estimate LiDAR fluxes in the range [0.5, 21] photons instead of simply counting the echo signal photons. The calibration of the laser pulse shape is performed using the GMM (Gaussian Mixture Model) method, which allows for the optimal signal flux value to be identified for describing the measured histogram. The waveform optimization is used to compensate for walking errors and improve range accuracy. Simulation results show that the method achieves a mean absolute error (MRE) within 9.55 % and a distance estimation accuracy of 12.01 mm. Changing the noise from 10 kHz to 100 kHz did not significantly degrade the algorithm performance. In the experiment, the depth precision can be better than 15.07 mm. Under the condition of different signal fluxes, the inversion values of signal flux and distance of the proposed method will converge to the ground truth with higher accuracy, which will more suitable for high dynamic range scene ranging and imaging.</div></div>","PeriodicalId":18349,"journal":{"name":"Measurement","volume":"242 ","pages":"Article 116239"},"PeriodicalIF":5.2,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142701530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0