Measurement最新文献

{"title":"A filtering approach for speech emotion recognition using wavelet approximation coefficient","authors":"Ravi,&nbsp;Sachin Taran","doi":"10.1016/j.measurement.2025.118165","DOIUrl":"10.1016/j.measurement.2025.118165","url":null,"abstract":"<div><div>The understanding of emotions from human speech signals is one of the most attractive areas of research. However, it is also challenging due to the influence of language and accent on speech. This framework presents a solution for speech emotion recognition based on wavelet approximation method. In this work, the Wavelet Approximation Speech Emotion Recognition (WaSER) model is presemted. The ‘db4′ wavelet is explored to calculate the approximation coefficient. At the initial stage, silent segments of the raw speech signal are eliminated using wavelet approximation and energy thresholding, resulting in a filtered signal. For the wavelet selection and threshold value optimization, various experiments are performed. A set of prosodic and spectral features is then extracted from the filtered signal. The potential features are selected using the ReliefF algorithm, and these optimal features are utilized for further processing. An ablation experiment is also presented to demonstrate the potential of the proposed WaSER model. The WaSER model was tested on various language-based datasets, including RAVDESS, EMOVO, Emo-DB and ShEMO, attaining a highest accuracy of 94.6% on the ShEMO dataset. The ablation experiment shows that filtering the speech significantly enhanced accuracy across all datasets and maintaining a balance between accuracy and sensitivity. Also, the proposed model drastically reduces the response time compared to the existing state of art.</div></div>","PeriodicalId":18349,"journal":{"name":"Measurement","volume":"256 ","pages":"Article 118165"},"PeriodicalIF":5.2,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144306492","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}

{"title":"A novel valve coil current-based droplet mass control method: Proportional valves for liquid injection process","authors":"Pengcheng Gao ,&nbsp;Kun Ren ,&nbsp;Tao Luo ,&nbsp;Chentao Ke ,&nbsp;Heyang Geng ,&nbsp;Yan Sun ,&nbsp;Jiabo Cheng","doi":"10.1016/j.measurement.2025.118168","DOIUrl":"10.1016/j.measurement.2025.118168","url":null,"abstract":"<div><div>In order to enhance the accuracy of liquid injection, a novel droplet mass control method is proposed in this paper. First, the working principle of a proportional valve is analyzed, and a current-displacement model is established based on Newton’s second law. Next, by taking into account the key parameters such as maximum working frequency and flow rate coefficient, the relationship between the mass of a droplet and the displacement of the valve piston is built. Then, using computational fluid dynamics (CFD) simulation, the method for determining the flow rate coefficient is denoted under the conditions of different displacements. Subsequently, by using rational cubic Bézier curves, the nonlinear relationship between the coil current and the mass of a droplet is established. Finally, a fuzzy PID control algorithm is employed to achieve rapid positioning of the valve piston, ensuring a stable output of the droplet mass. The experimental results indicate that the proposed method can control the final liquid injection error is within 0.4 mg, ensuring high precision in liquid injection.</div></div>","PeriodicalId":18349,"journal":{"name":"Measurement","volume":"256 ","pages":"Article 118168"},"PeriodicalIF":5.2,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144313322","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}

{"title":"The study of baseline drift in MEMS sonar buoys","authors":"Zhengyu Bai ,&nbsp;Guojun Zhang ,&nbsp;Yujia Chai ,&nbsp;Guochang Liu ,&nbsp;Yan Liu ,&nbsp;Yuhao Huang ,&nbsp;Wenqing Zhang ,&nbsp;Li Jia ,&nbsp;Yanan Geng ,&nbsp;Renxin Wang ,&nbsp;Wendong Zhang","doi":"10.1016/j.measurement.2025.118137","DOIUrl":"10.1016/j.measurement.2025.118137","url":null,"abstract":"<div><div>MEMS sonar buoys are susceptible to motion induced by surface wave excitation, leading to signal distortion and baseline drift. To address this, a coupled motion model between the buoy and surface waves was developed using COMSOL Multiphysics 6.0, with results consistent with theoretical analysis. The output response of the MEMS buoy under vibrations from different directions was simulated, and its sensitivity to vibration direction was analyzed. A damping device comprising two disks connected by multiple elastic ropes was proposed. Transfer function analysis was used to evaluate the impact of key design parameters, revealing superior vibration isolation across frequencies compared to traditional single-disk setups. Experimental validation showed that the proposed design effectively smooths the output signal baseline, achieving an improvement of 18.55 dB at 4 Hz. This study provides a multiphysics-based method for understanding buoy–wave interactions and offers a practical solution to enhance measurement stability. The proposed damping system holds significant promise for improving MEMS sonar buoy performance in complex marine environments.</div></div>","PeriodicalId":18349,"journal":{"name":"Measurement","volume":"256 ","pages":"Article 118137"},"PeriodicalIF":5.2,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144330980","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}

{"title":"A compact in-situ shape sensing membrane integrating displacement reconstruction and sensor layout design algorithm","authors":"Jiafeng Zhu ,&nbsp;Jin Lu ,&nbsp;Jingjing Ji","doi":"10.1016/j.measurement.2025.118033","DOIUrl":"10.1016/j.measurement.2025.118033","url":null,"abstract":"<div><div>Precise real-time shape sensing enables early fault prevention and ensures the stable operation of key structures. This paper presents a novel in-situ shape sensing system designed to achieve high-precision full-field displacement reconstruction. Leveraging the flexible strain-sensing membrane with compact strain rosettes and the single-sided inverse finite element method (ssiFEM)-based layout design algorithm (sLDA), the system optimizes the arrangement of strain rosettes for enhanced reconstruct accuracy under varying working conditions. By integrating the ssiFEM with optimization algorithm, the proposed sLDA minimizes reconstruction errors, enabling the system to reconstruct reliable and real-time displacement fields using a limited number of measurement channels. Simulations and experiments on a variable camber wing demonstrate the effectiveness of the system, which improves up to 8.5% reconstruction accuracy compared to a conventionally uniform layout. The results confirm that the shape sensing system offers a versatile, cost-effective solution for multi-scale structural health monitoring applications.</div></div>","PeriodicalId":18349,"journal":{"name":"Measurement","volume":"256 ","pages":"Article 118033"},"PeriodicalIF":5.2,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144331066","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}

{"title":"Simultaneous Mach number, thrust, and combustion efficiency measurement for a scramjet by using a beam-jitter-resistant TDLAS sensor","authors":"Wenbin Zhou ,&nbsp;Zhang Cao ,&nbsp;Suyi Dou ,&nbsp;Qingchun Yang ,&nbsp;Lijun Xu","doi":"10.1016/j.measurement.2025.118169","DOIUrl":"10.1016/j.measurement.2025.118169","url":null,"abstract":"<div><div>Scramjets are the optimal propulsion systems for hypersonic applications due to their air-breathing architecture. The Mach number, thrust, and combustion efficiency of a scramjet are very sensitive to parameter changes in the chamber and must be precisely measured using a non-contact experimental method, i.e., tunable diode laser absorption spectroscopy (TDLAS). The supersonic flow generated by the scramjet induces laser beam jitter in the TDLAS sensor. In this paper, a robust TDLAS sensor with beam-jitter-resistant capabilities was developed to quantify simultaneously temperature, pressure, H₂O concentration, and speed of supersonic flows in scramjets. From these four parameters, an online evaluation method for Mach number, thrust, and combustion efficiency was validated on a direct-connected scramjet platform. In supersonic flow, the signal-to-noise ratio of the proposed sensor was improved by approximately 9.28 dB. During stable operation, relative errors for average temperature, pressure, H₂O concentration, speed, Mach number, and thrust were respectively about 1.4 %, 3.4 %, 3.5 %, 0.4 %, 1.1 %, and 1.7 %. The combustion efficiency of the scramjet platform was 77.83 %. The proposed sensor enables the continuous monitoring of scramjet operation at an update rate of 5 kHz and provides an effective method for scramjet performance evaluation.</div></div>","PeriodicalId":18349,"journal":{"name":"Measurement","volume":"256 ","pages":"Article 118169"},"PeriodicalIF":5.2,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144291522","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}

{"title":"Feasibility analysis of EIT-guided lung tumor tracking with prior information for robotic arm-assisted radiotherapy","authors":"Hao Yu ,&nbsp;Hao Yu ,&nbsp;Zhongxu Dong ,&nbsp;Wei Han ,&nbsp;Yang Wu ,&nbsp;Chunpeng Wang ,&nbsp;Zhe Liu ,&nbsp;Jiabin Jia","doi":"10.1016/j.measurement.2025.117986","DOIUrl":"10.1016/j.measurement.2025.117986","url":null,"abstract":"<div><div>Lung cancer remains one of the most prevalent and lethal forms of cancer worldwide. Radiotherapy is an effective therapeutic strategy for its management, where precise tumor localization plays a pivotal role in ensuring treatment accuracy and efficacy. Electrical Impedance Tomography (EIT), a non-invasive and cost-effective imaging technique with a high temporal resolution, shows promise for tissue abnormality detection by exploiting the inherent differences in electrical properties among biological tissues. In this study, we propose a method that combines EIT with prior information from X-ray Computed Tomography (XCT) to determine tumor position. The integrated localization data are then transferblack to a robotic arm, which uses this information to accurately guide radiotherapy procedures. The detailed system design of the EIT-guided robotic arm for radiotherapy is presented. Additionally, both simulations and water tank experiments are conducted to validate the feasibility of this approach. The results demonstrate the potential of integrating EIT with XCT and robotic systems for tumor localization and targeted radiotherapy, thereby broadening the clinical applications of EIT in the medical field.</div></div>","PeriodicalId":18349,"journal":{"name":"Measurement","volume":"256 ","pages":"Article 117986"},"PeriodicalIF":5.2,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144322822","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}

{"title":"Fabrication and characterization of a piezo-MEMS uniaxial accelerometer as a tool for the monitoring of combustion instability in gas turbine engines","authors":"M.A. Signore ,&nbsp;C. De Pascali ,&nbsp;F. Quaranta ,&nbsp;L. Velardi ,&nbsp;D. Valerini ,&nbsp;I. Farella ,&nbsp;P. Di Gloria ,&nbsp;M.G. De Giorgi ,&nbsp;A. Ficarella ,&nbsp;L. Francioso","doi":"10.1016/j.measurement.2025.118166","DOIUrl":"10.1016/j.measurement.2025.118166","url":null,"abstract":"<div><div>This work is focused on the design, simulation, microfabrication, and characterization of an uniaxial piezoelectric MEMS accelerometer. It investigates the capability of the proposed device to monitor the combustion instability induced by the addition of air into jet-A1 fuel in a combustion chamber. The membrane structure of the accelerometer is modeled using the commercial FEM package COMSOL Multiphysics to optimize the geometrical parameters and validated through both analytical and experimental results. Aluminum nitride (AlN) thin film, deposited by sputtering process and characterized for its nanomechanical properties, was chosen as the active piezoelectric material of the accelerometer thanks to its compatibility with the complementary metal oxide semiconductor (CMOS) technology. The accelerometer has been characterized in terms of frequency response, sensitivity, and linearity. All experimental results, which are in good agreement with simulations, show that the functional characteristics of the accelerometer are as follows: resonance frequency of about 3.8 kHz; linear bandwidth in the range 0.3 – 1.2 kHz; dynamic sensitivity of 0.25 mV/g with a linearity of 99.1 %. Experiments for the monitoring of the combustion instability were conducted on a liquid-fueled swirling combustor with a nominal power of 300 kW at two global equivalence ratios (<span><math><mrow><mi>Φ</mi></mrow></math></span>), i.e. 0.36 and 0.18. The microfabricated accelerometer was positioned on the combustion chamber structure near the flame in the combustion zone for the measurement of the chamber vibrations. Its response was compared with the one of a commercial pressure sensor to assess its reliability, demonstrating good correlation between the signals coming from the two devices. Mean, variance and Kurtosis data analysis techniques were employed to elaborate signals coming from both sensors to provide a quantitative indicator of the combustion instability. Given its high sensitivity and wide linear bandwidth, the accelerometer can detect subtle variations in chamber vibrations, which are critical for early identification of combustion instability. By providing real-time, high-resolution monitoring, the device offers a non-invasive method for detecting and diagnosing instability phenomena that are often difficult to assess with traditional pressure sensors. The results demonstrate the potential of the realized piezoelectric accelerometer in understanding combustion instability mechanisms in gas turbines. Moreover, together with being a promising non-invasive tool of diagnosis of this phenomenon, the proposed solution is also expected to be a challenge for combustion instability prediction, contributing to the development of more stable combustors.</div></div>","PeriodicalId":18349,"journal":{"name":"Measurement","volume":"256 ","pages":"Article 118166"},"PeriodicalIF":5.2,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144331064","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}

{"title":"Thermal compensation study of a novel electronic pressure scanner based on crested porcupine optimizer combined with deep belief network","authors":"Huan Wang ,&nbsp;Ting Wu ,&nbsp;Jiaxu Xia ,&nbsp;Pan Liu ,&nbsp;Yijun Zou ,&nbsp;Qinghua Zeng","doi":"10.1016/j.measurement.2025.118167","DOIUrl":"10.1016/j.measurement.2025.118167","url":null,"abstract":"<div><div>The pressure parameters of hypersonic vehicles and their key components, such as engine inlets, are critical to the reliability and stability of the system. Their variations have a direct impact on vehicle performance and flight safety optimization. In order to meet the extreme working conditions in hypersonic environments, a novel high-temperature-resistant electronic pressure scanner is designed in this study, which can be directly integrated into the engine to realize accurate pressure measurement under high-temperature and high-Mach-number conditions. In order to verify the environmental adaptability of this electronic pressure scanner, this paper carries out a high-temperature thermal test and calibration experiment, and obtains high-precision calibration data under different temperature conditions. However, due to the temperature drift effect, measurement errors still exist. To effectively solve this problem, this paper proposes a thermal error compensation method based on CPO-DBN (Crested Porcupine Optimizer-Deep Belief Network), which optimizes the hyperparameters of the deep belief network through the defense mechanism of the crown porcupine, to improve the model’s nonlinear fitting ability and compensation accuracy. The experimental results showed that, compared with the traditional BP (Back Propagation) neural network, DBN and PSO-DBN (Particle Swarm Optimization-DBN) models, the CPO-DBN model had the best performance in thermal error compensation, and the maximum absolute error of pressure measurement was reduced to 1.722 kPa. The compensation accuracy is improved to 0.17 % F.S. with a coefficient of determination of <em>R²</em> = 0.994. This is significantly better than other comparative methods. This study provides an innovative solution for the thermal error compensation of the electronic pressure scanner in high temperature environments, and provides technical support for the performance optimization and system stability improvement of the key components of hypersonic vehicles, which has important engineering application value.</div></div>","PeriodicalId":18349,"journal":{"name":"Measurement","volume":"256 ","pages":"Article 118167"},"PeriodicalIF":5.2,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144280040","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}

{"title":"CAPR: An improved spectral variable selection algorithm for cobalt ion detection in zinc hydrometallurgy","authors":"Qilong Wan ,&nbsp;Hongqiu Zhu ,&nbsp;Chunhua Yang ,&nbsp;Fei Cheng ,&nbsp;Jianqiang Yuan ,&nbsp;Can Zhou","doi":"10.1016/j.measurement.2025.118150","DOIUrl":"10.1016/j.measurement.2025.118150","url":null,"abstract":"<div><div>In order to accurately detect the concentration of cobalt ions in zinc solution, we used a self-developed automatic detection system to complete the full spectrum collection of cobalt zinc solution with different cobalt ion concentrations, and established various full spectrum models. The test results show that the combination model of competitive adaptive reweighted sampling (CARS) and partial least squares regression (PLSR) has good comprehensive performance. However, in the process of theoretical analysis and experimentation, we found potential weaknesses of CARS algorithm and proposed an improved variable selection algorithm called competition area proportional reduction (CAPR). The test results show that the performance of the CAPR-PLSR model on the cobalt ion spectral dataset is superior to other ten regression models, including the CARS-PLSR model. In addition, we conducted sixteen additional comparative tests on four spectral datasets from different detection domains to demonstrate the effectiveness of CAPR.</div></div>","PeriodicalId":18349,"journal":{"name":"Measurement","volume":"256 ","pages":"Article 118150"},"PeriodicalIF":5.2,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144306505","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}

{"title":"Silicon avalanche photodiode for 13.5 nm radiation detection","authors":"P.N. Aruev ,&nbsp;P.S. Butorin ,&nbsp;V.V. Zabrodskii ,&nbsp;A.V. Nikolaev ,&nbsp;M.E. Sasin ,&nbsp;A.S. Shashkina ,&nbsp;E.V. Sherstnev","doi":"10.1016/j.measurement.2025.118162","DOIUrl":"10.1016/j.measurement.2025.118162","url":null,"abstract":"<div><div>The characteristics of a silicon avalanche photodiode with a 340 μm active region diameter were studied by femtosecond laser pulses with wavelengths of 500, 600, 800 and 1000 nm and a nanosecond EUV source with a wavelength of 13.5 nm. It is shown that the dynamics of the avalanche photodiode photoresponse integral for a wavelength of 13.5 nm is similar to the dynamics for the 500 nm. Avalanche photodiode has a rise time within 135 ps and a fall time within 280 ps in the case of 500 nm wavelength, at a reverse bias voltage range between 240 V and 260 V. The presented avalanche photodiode matches subnanosecond time resolution limitations for studying radiation sources with a wavelength of 13.5 nm.</div></div>","PeriodicalId":18349,"journal":{"name":"Measurement","volume":"256 ","pages":"Article 118162"},"PeriodicalIF":5.2,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144313325","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}