Contactless torque sensors based on optical methods: A review

Zhong, Shuncong; Chen, Linnan; Liang, Wei; Nsengiyumva, Walter; Yu, Yingjie; Li, Tao; Zhang, Qiukun; Lin, Jiewen; Zhong, Jianfeng; Li, Jinlin

doi:10.1016/j.optlaseng.2023.107832

Cited by 5 publications

(5 citation statements)

References 108 publications

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“…Non-contact moment sensors based on optical methods are described in [14], in particular, moment measurement methods using laser speckle effect, Doppler effect, and a number of other optical methods were evaluated. However, the cited study could be supplemented by analyzing the capabilities of non-contact torque sensors with other measurement and control systems.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Devising a technique for measuring torque of electric motors using machine vision

Kvasnikov,

Kvashuk,

Prygara

et al. 2024

EEJET

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The object of research is the technique for measuring torques of electric motors. The main problem to be solved is the need to expand the range of informative parameters used in transmission torque converters of electric motors. This need arises from the design complications of placing the measuring devices directly on the motor shaft. As part of the study, a system was designed for determining the torques of electric motors, which combines the procedure for assessing the load on the shaft and software tools for visually determining the quantitative characteristics of such a load using machine vision. In order to acquire visual characteristics of the twisting of the shaft, a special coupling with an insert containing a liquid was designed. This coupling is able to change its shape in proportion to the load on electric motor shaft. The proposed visual control system, based on video information processing techniques, makes it possible to analyze changes in the shape of the coupling caused by the action of the torque. Features of the application of the proposed measurement technique are that there is no need to place electronic components of the measuring transducer directly on the shaft. Due to the specified features, the proposed procedure provides a solution to the problems of torque measurement in aggressive environments, which is of crucial importance for the efficiency of some specific production processes. Analysis of the visual characteristics of torque showed that the proposed approach could be applied in measuring transducers. At the same time, the results of testing the procedure confirmed that it requires the use of high-precision video recording equipment. This paves the way for the design of new, more modern, and reliable measurement systems that could be used in a wide range of industrial solutions

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

Devising a technique for measuring torque of electric motors using machine vision

Kvasnikov,

Kvashuk,

Prygara

et al. 2024

EEJET

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show abstract

“…Torque is one of the fundamental parameters in rotational mechanical systems, playing a pivotal role in various engineering activities which involve the use of rotating machinery [ 1 , 2 , 3 ]. Its significance spans across industries such as mechanical manufacturing [ 4 ], automotive manufacturing [ 5 ], aerospace engineering [ 6 ], maritime sectors [ 7 ], and other related fields.…”

Section: Introductionmentioning

confidence: 99%

“…Within shaft-driven systems, the torque value is intricately linked to mechanical power performance, energy consumption, lifespan, and safety measures [ 8 , 9 ]. Hence, the accurate, timely, and reliable measurement of torque holds significant importance in ensuring the overall safety and stability of mechanical devices and systems [ 1 ].…”

Section: Introductionmentioning

confidence: 99%

“…Compared to the methods discussed earlier, torque measurement methods based on optical principles inherently offer advantages, allowing for higher precision and sensitivity [ 1 ]. For instance, in [ 16 ], a non-contact torque measurement system is designed based on zebra-tapes and optical sensors.…”

Section: Introductionmentioning

confidence: 99%

“…1 For each test group, the first data represents the maximum error among the 20 measurement points in that group 2. The second data in the pair represents the RMSE of the torque values in that group.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Optoelectronic Torque Measurement System Based on SAPSO-RBF Algorithm

Xia,

Lou,

Yuan

et al. 2024

Sensors

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The torque is a significant indicator reflecting the comprehensive operational characteristics of a power system. Thus, accurate torque measurement plays a pivotal role in ensuring the safety and stability of the system. However, conventional torque measurement systems predominantly rely on strain gauges adhered to the shaft, often leading to reduced accuracy, poor repeatability, and non-traceability due to the influence of strain gauge adhesion. To tackle the challenge, this paper introduces a photoelectric torque measurement system. Quadrants of photoelectric sensors are employed to capture minute deformations induced by torque on the rotational axis, converting them into measurable voltage. Subsequently, the system employs the radial basis function neural network optimized by simulated annealing combined with particle swarm algorithm (SAPSO-RBF) to establish a correlation between measured torque values and standard references, thereby calibrating the measured values. Experimental results affirm the system’s capability to accurately determine torque measurements and execute calibration, minimizing measurement errors to 0.92%.

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