Calibration of the Ultrasonic Sensor-Range Finder by the Laser Interferometer

Yatsyshyn, Svyatoslav; Nazarkevych, Ihor; Mastylo, Rostyslav

doi:10.23939/istcmtm2020.04.010

Cited by 3 publications

(2 citation statements)

References 2 publications

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“…Studies of robot kinematics with their help were complex since the working robot created mechanical shocks (vibration) and electromagnetic interference. Therefore, the solution was to calibrate ultrasonic smart sensors of distance by laser interferometer proceeding their deployment into the robot [12].…”

Section: Thermal Errorsmentioning

confidence: 99%

Factors Affecting the Accuracy and Repeatability of Industrial Robot Positioning

Kokoshko¹,

Mastylo²

2022

MEM

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Industrial robots refer to the most complex products of mechanical engineering and electronic equipment in terms of their labor intensity, accuracy, and a class of manufacture as well as quality requirements. Both static and dynamic positioning inaccuracies occur during their operation. Static positioning depends mainly on such parameters as joint axis geometry and angle offset. Non-geometric parameters include compliance (elasticity of joints and bonds), gear form errors (eccentricity and gear errors), gear backlash, and temperature-related expansion. Dynamic positioning is only relevant for large robots that are subject to high speeds and accelerations. Positioning accuracy is affected by the design features of the robot, the control system, the speed of movement and rotation of the manipulator, temperature, and vibrations, both inherent and caused by the robot's location in production. This research examines the sources of positioning inaccuracy and gives recommendations for improving the positioning characteristics of robots.

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Section: Thermal Errorsmentioning

confidence: 99%

Factors Affecting the Accuracy and Repeatability of Industrial Robot Positioning

Kokoshko¹,

Mastylo²

2022

MEM

Self Cite

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“…Extrinsic factors are those related to how the sensor is deployed in the applications and how those factors impact the sensor's measurements [13,14]. The process of extrinsic calibration is the most successful at removing errors when performed under the similar conditions the sensor will perform in the application [10,[14][15][16][17]. This process is also referred to as a static calibration, where the sensor's output is measured in respect to known or "true" values [18].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Ultrasonic Sensor for Precision Liquid Volume Measurement in Narrow Tubes and Pipes

2023

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The introduction of computer vision and machine learning into agricultural systems has produced significant new opportunities for high precision application of liquid products in both grain and livestock agriculture. These technologies, which enable liquid application in site-specific, non-broadcast applications, are driving new evaluations of nozzle technologies which apply a consistent dose of liquid product in a non-conventional manner compared to historic perceptions. This field of innovation is driving the need for improved high-capacity systems for evaluating nozzle performance in high-precision applications. Historically, patternator tables with volumetric measurements of total applied liquid have served as the standard for fluid nozzle evaluation. These volumetric measurements are based on measuring the displaced distance of liquid over a defined time to determine flow rate. However, current distance sensors present challenges for achieving small-volume measurements and enabling automation at a scale necessary to meet innovation demands of high-precision nozzle systems. A novel concept for high speed and automated measurement of a high precision patternator table was developed using an ultrasonic sensor and a carefully designed liquid retainment system to maximize measurement precision. The performance of this system was quantified by comparing calibrations and performance across different vessels for volume measurement (tubes and pipes) used in the application of a nozzle patternator. A total of three square tubes (15.9, 22.3, 31.0 mm widths) and three pipes (25.2, 27.0, 35.1 mm diameters) were evaluated, with the 27 mm pipe matching the ultrasonic sensor’s rating. All calibrations were successful, depicting linear characteristics with R2 > 0.99. The smallest pipe presented issues for the sensor to measure in post-calibration and was thus not evaluated further. The residual values from operational performance highlight that the 25.2 mm tube and the 27.0 mm pipe are highly accurate with no indication of bias or non-normality. The relative uncertainty ranges from 2.9 to 42% (350 mL to 25 mL) depending on the tube and pipe cross-sectional diameter or width with the sensor accuracy and uncertainty in the tube and pipe area being the largest factors. The results of this study indicate that the 25.2 mm tube and the 27.0 mm pipe could be excellent options for autonomous liquid volume measurement with the ultrasonic sensor. A key challenge identified in this study is that the assumptions in the sensor’s intrinsic calibration are violated with the tubes and pipes evaluated.

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Features of Transferring Size of Length Unit From Working Standard to Measuring Device

Nazarkevych,

Seheda

2024

MEM

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The paper examines the characteristics of accuracy when transferring the size of a unit of length from a standard to an industrial measuring device. Based on the processing of the calibration results, the peculiarities of using different transfer schemes within the limits of the current regulatory document were considered. The problems that arise are studied. To ensure an effective scheme of transfer and unity of measurements, the expediency of application of the method of RMS deviations in the analysis of the obtained measurement results is shown.

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Calibration of the Ultrasonic Sensor-Range Finder by the Laser Interferometer

Cited by 3 publications

References 2 publications

Factors Affecting the Accuracy and Repeatability of Industrial Robot Positioning

Factors Affecting the Accuracy and Repeatability of Industrial Robot Positioning

Evaluation of Ultrasonic Sensor for Precision Liquid Volume Measurement in Narrow Tubes and Pipes

Features of Transferring Size of Length Unit From Working Standard to Measuring Device

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