Application of Arithmetic Operations Method in Single Pair-Pole Magnetic Encoder

2011 ◽  
Vol 128-129 ◽  
pp. 85-91
Author(s):  
Yi Fan Zeng ◽  
Rui Li
Keyword(s):  
High Speed ◽  
Angle Measurement ◽  
Single Pair ◽  
Nonlinear Correction ◽  
Arithmetic Operations ◽  
Rotational Angle ◽  
Voltage Signal ◽  
Fpga Chip ◽  
Novel Method ◽  
Hall Sensors

This paper proposes a novel method called arithmetic operations to analyze and process the generated voltage-signal from the single pair-pole magnetic encoder. Dual orthogonal voltage-signals are generated by two vertical hall sensors which are placed in the bottom of a columned magnet. When signals pass A/D converter, the quadrant determination, arithmetic operations and nonlinear correction in FPGA chip are performed before the values of rotational angle are displayed on the LED. This paper also designs and implements the single pair-pole magnetic encoder which has advantages such as high-speed, high-resolution and high-accuracy in the area of angle measurement.

scholarly journals Additively Manufactured Parts Made of a Polymer Material Used for the Experimental Verification of a Component of a High-Speed Machine with an Optimised Geometry—Preliminary Research

Polymers ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 137
Author(s):  
Artur Andrearczyk ◽  
Bartlomiej Konieczny ◽  
Jerzy Sokołowski
Keyword(s):  
Polymer Material ◽  
High Speed ◽  
Numerical Models ◽  
Flow Analysis ◽  
Experimental Tests ◽  
Strength Analysis ◽  
Compressor Wheel ◽  
Operational Characteristics ◽  
3D Printed ◽  
Novel Method

This paper describes a novel method for the experimental validation of numerically optimised turbomachinery components. In the field of additive manufacturing, numerical models still need to be improved, especially with the experimental data. The paper presents the operational characteristics of a compressor wheel, measured during experimental research. The validation process included conducting a computational flow analysis and experimental tests of two compressor wheels: The aluminium wheel and the 3D printed wheel (made of a polymer material). The chosen manufacturing technology and the results obtained made it possible to determine the speed range in which the operation of the tested machine is stable. In addition, dynamic destructive tests were performed on the polymer disc and their results were compared with the results of the strength analysis. The tests were carried out at high rotational speeds (up to 120,000 rpm). The results of the research described above have proven the utility of this technology in the research and development of high-speed turbomachines operating at speeds up to 90,000 rpm. The research results obtained show that the technology used is suitable for multi-variant optimization of the tested machine part. This work has also contributed to the further development of numerical models.

scholarly journals A Novel Vision-Based Pose Measurement Method Considering the Refraction of Light

Sensors ◽  
2018 ◽  
Vol 18 (12) ◽  
pp. 4348 ◽  
Author(s):  
Wei Liu ◽  
Xin Ma ◽  
Xiao Li ◽  
Yi Pan ◽  
Fuji Wang ◽  
...  
Keyword(s):  
Wind Tunnel ◽  
High Speed ◽  
Measurement Accuracy ◽  
Performance Testing ◽  
Angle Measurement ◽  
Normal Vector ◽  
Calibration Model ◽  
Linear Calibration ◽  
Observation Window ◽  
Vision Measurement

Nowadays, due to the advantages of non-contact and high-speed, vision-based pose measurements have been widely used for aircraft performance testing in a wind tunnel. However, usually glass ports are used to protect cameras against the high-speed airflow influence, which will lead to a big measurement error. In this paper, to further improve the vision-based pose measurement accuracy, an imaging model which considers the refraction light of the observation window was proposed. In this method, a nonlinear camera calibration model considering the refraction brought by the wind tunnel observation window, was established first. What’s more, a new method for the linear calibration of the normal vector of the glass observation window was presented. Then, combining with the proposed matching method based on coplanarity constraint, the six pose parameters of the falling target could be calculated. Finally, the experimental setup was established to conduct the pose measurement study in the laboratory, and the results satisfied the application requirements. Besides, experiments for verifying the vision measurement accuracy were also performed, and the results indicated that the displacement and angle measurement accuracy approximately increased by 57% and 33.6%, respectively, which showed the high accuracy of the proposed method.

A novel method for virtual clearance computation of high-speed train based on model integration and convex hull

2017 ◽  
Vol 24 (10) ◽  
pp. 2458-2467
Author(s):  
Bing Yi ◽  
Xiong-bing Li ◽  
Wei Zeng ◽  
Yong-feng Song ◽  
Yue Yang
Keyword(s):  
Convex Hull ◽  
High Speed ◽  
Model Integration ◽  
High Speed Train ◽  
Novel Method

Analysis of Synchronization Angle Precision in RCS Measurement and its High Speed Synchronous Pulse Implementation

2013 ◽  
Vol 303-306 ◽  
pp. 493-497
Author(s):  
Dong Chen ◽  
Hua Pei Wang ◽  
Qing Guo
Keyword(s):  
Mathematical Model ◽  
Cross Section ◽  
High Precision ◽  
High Speed ◽  
Radar Cross Section ◽  
Angle Measurement ◽  
Precision Measurements ◽  
Fixed Angle ◽  
Synchronous Pulse ◽  
Angle Interval

To meet the demand for high precision measurements of radar cross section (RCS) in microwave anechoic chamber, the effect of angle repeatability of position servo system in background cancellation technology is analyzed and its error mathematical model is presented. Then a method of high speed synchronization angle measurement based on CPLD is proposed, which improves the precision of synchronization angle measurement in any fixed angle interval. The experiment results show that this method can effectively solve the accuracy of target RCS when rotating.

scholarly journals Research on Rotational Angle Measurement for the Smart Wheel Force Sensor

Sensors ◽  
2020 ◽  
Vol 20 (4) ◽  
pp. 1037 ◽  
Author(s):  
Dong Wang ◽  
Siwei Chen ◽  
Xuanpeng Li ◽  
Weigong Zhang ◽  
Haolong Jin
Keyword(s):  
Rotational Speed ◽  
Force Sensor ◽  
Angle Measurement ◽  
New Method ◽  
Rotational Angle ◽  
Centripetal Acceleration ◽  
Sources Of Error

The measurement of the rotational angle of the wheel is critical for the smart wheel force sensor (SWFS) to obtain the wheel forces defined in the vehicle coordinates. To simplify the structure of the SWFS and overcome the shortcomings of the traditional angular transducer, a new method to evaluate the rotational speed of the wheel and then calculate the rotational angle is proposed in this paper. In this method, the centripetal acceleration caused by the rotation is recorded by three accelerometers and used carefully. What’s more, the possible sources of error are classified and analyzed. Simulations and stand experiment are carried out to demonstrate the effectiveness of the proposed method.

A Novel Method for Hull's Three Dimensional Deformation Measurement

2013 ◽  
Vol 344 ◽  
pp. 93-98 ◽  
Author(s):  
Xin Ming Liu ◽  
Yao Yu Zhang ◽  
Xiao Yong Feng ◽  
Qian Xue Wang
Keyword(s):  
Optical Sensor ◽  
Twist Angle ◽  
Three Dimensional ◽  
Angle Measurement ◽  
Deformation Measurement ◽  
Dynamic Experiments ◽  
Moire Fringe ◽  
Novel Method ◽  
Moiré Fringe ◽  
Dynamic States

In this paper, a novel method for hulls three-dimensional angle measurement is presented. For the measurement of the transverse twist angle, a method based on moiré fringe is proposed, for the lengthways flexibility and course flexibility angle the conventional optical sensor method is applied. The principle of the measurement is discussed in detail. To verify the accuracy of the proposed method, both static and dynamic experiments are carried out. Results show that in the static states, the accuracy for them are smaller than 5'', in the dynamic states, the accuracy for them are smaller than 10''.

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