A Calculation Method for the Optimal Initial Polar Distance of Capacitive Force Sensors

Pu, Minghui; Zhang, Jinhao; Qi-hong, Yao; Cai, Baocheng

doi:10.1109/jsen.2023.3242070

Cited by 2 publications

(1 citation statement)

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“…These environmental factors will lead to false readings or sensor malfunction [5], so it is not often used in relay system. Capacitive distance sensor is a noncontact sensor with simple structure and low cost, but it requires high-voltage power supply and has a large nonlinear error [6]. The photoelectric distance sensor measures the displacement of the object according to a photoemission principle of the photocell.…”

Section: Introductionmentioning

confidence: 99%

Gap measurement method based on projection lines and convex analysis of 3D points cloud

Pan,

Jiang,

Tang

et al. 2024

Meas. Sci. Technol.

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Accurate measurement of the gap between the lower surface of the relay and the ground is critical for ensuring the quality of the finished product. Traditional gap measurement methods have some shortcomings, such as low accuracy, poor robustness, and loss of depth clues in obscured areas. In this study, a novel gap measurement method based on computer vision is proposed, which includes a projection line model based on guided filtering and a 3D surface point cloud model based on a three dimensional plane reference.- The relay gap was measured by calculating the projection lines of the upper and lower surfaces of the gap with an error of ±0.016 mm. A 3D point cloud model captures the key features of the underside of the relay through image processing techniques, and combines convex hull and centroid estimation to construct a three-dimensional reference plane for the gap, which could achieve high-precision, real-time measurement of the gap (with an error less than ±0.0087 mm). The experimental measurement results show that the proposed method is better than the SelfConvNet method, which has a high measurement accuracy and strong anti-interference ability, and an accuracy rate of up to 99.5% in factory relay quality inspection experiments.

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Section: Introductionmentioning

confidence: 99%