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.

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.

Angle measurement based on the internal-reflection effect: a new method

1992 ◽  
Vol 31 (28) ◽  
pp. 6047 ◽  
Author(s):  
P. S. Huang ◽  
S. Kiyono ◽  
O. Kamada
Keyword(s):  
Angle Measurement ◽  
Internal Reflection ◽  
New Method ◽  
Reflection Effect

Synchronous Winches to Lift the Ship and Distributed Control System to Distribute the Motor Loads for Marine Using CAN Protocol

2017 ◽  
Vol 8 (2) ◽  
pp. 586
Author(s):  
R. Sundar
Keyword(s):  
Control System ◽  
Distributed Control ◽  
Rotational Speed ◽  
New Method ◽  
Distributed Control System ◽  
Dc Motors ◽  
As If

<p>A shiplift is a modern alternative for these older systems. It consists of a structural platform that is lifted and lowered exactly vertical, synchronously by a number of hoists. First, the platform is lowered underwater, then the ship is floated above the support, and finally the platform with ship is lifted and the ship is brought to the level of the harbor. The modern ship lifts use synchronous winches to hoist a ship.</p><p>Our project proposes a new method to construct an automated ship lifting installation. According to this, each hoisting winch is entirely controlled by a dedicated microcontroller. All such hoists on either side of the platform are networked via CAN. This result in a distributed control system that runs all the hoists synchronously, thereby achieving precisely distributed motor loads and assuring that ships cannot slip. The project uses four such hoists to raise and lower the platform. Hoists are driven by dc motors with the microcontroller controlling the winch rotational speed. Each hoist is a CAN node on the network. In order to safely operate any shiplift, all hoists must be perfectly synchronized. Winches operate at the specified speed, regardless of load, behaving as if they are mechanically coupled together. A fifth node on the network acts as the control and monitoring unit for the entire hoisting maneuver. It has switches to start and stop the process and LCD screen to display the distribution of motor loads. The Ship lifting speed is changes according to the weight of the ship.</p>

scholarly journals A new method of determining half-value periods from observations with a single Geiger counter

1942 ◽  
Vol 181 (985) ◽  
pp. 183-197 ◽  
Keyword(s):  
Geiger Counter ◽  
New Method ◽  
Coincidence Circuit ◽  
Sources Of Error

A coincidence circuit is described which makes possible the determination of half-value periods between 10 -4 sec. and 1 sec. using a single Geiger counter. This arrangement has been used to determine the half-value periods of actinium A, thorium A and radium C' with the following results: AcA ( 1·83 ± 0·04) x 10 -3 sec., ThA (1·58 ± 0·08) x 10 -1 sec., RaC ' (1·48 ± 0·06) x 10 -4 sec. A discussion of the limitations of the method and of possible sources of error is given.

scholarly journals A new method of determining the age of certain minerals

1934 ◽  
Vol 145 (855) ◽  
pp. 591-598 ◽  
Keyword(s):  
Chemical Analysis ◽  
Age Determination ◽  
Great Accuracy ◽  
New Method ◽  
Sources Of Error ◽  
Common Lead

The problem of age determination of a mineral is of great interest both from a geological and physical standpoint. The most widley used method is a radioactive one, based on the lead-uranium ratio as found by chemical analysis of the mineral. There are possible sources of error in this method owing to contamination with common lead and to alteration of the lead. It is the purpose of the present paper to suggest a new method which, although not at present capable of great accuracy, seems to be free from some of these difficulties. It is based on the presence of actinium in pleochroic haloes as disclosed by the new halo photometer discussed in the two preceding papers. The most commonly accepted theory of the origin of the actinium series of radioelements, due to Piccard and Rutherford is that the parent of the series is actinouranium, AcU, an isotope of uranium. This theory has been worked out in detail by von Grosse while Western abd Ruark have further analysed the relevant data. Since AcU is found to have a shorter period than UI, the older the mineral the greater should be the ratio of the amount of AcD lead (Pb 207 ) to the amount of RaG lead (Pb 206 ).

A new method for track angle measurement in a gridded ionization chamber

1959 ◽  
Vol 4 (4) ◽  
pp. 221-227 ◽  
Author(s):  
U. Facchini ◽  
E. Gatti ◽  
F. Pellegrini
Keyword(s):  
Ionization Chamber ◽  
Angle Measurement ◽  
New Method

Research on Measurement Method of Rotational Angle of Plane Rudder Based on ADXL345 Sensor

2014 ◽  
Vol 556-562 ◽  
pp. 3124-3128
Author(s):  
Quan Fa Yang ◽  
Gui Rong Ye ◽  
Chang You Li
Keyword(s):  
Measurement Method ◽  
Maximum Error ◽  
Angle Measurement ◽  
Coordinate Space ◽  
Acceleration Sensor ◽  
Transformation Theory ◽  
Rotational Angle ◽  
Space Transformation ◽  
Mathematical Expressions ◽  
Inclination Angles

A measurement method based on digital MEMS’ acceleration sensor is proposed. The paper analyzes the working principle of capacitive acceleration sensor. According to the coordinate space transformation theory, a mathematical model of the measurement method was built, and the mathematical expressions of the angle displacement of aircraft rudder was deduced; A measurement system of aircraft tail wing inclined was established using MEMS’ acceleration ADXL345, and taken STM32 as controller. Setting different angles in 3D turntable and aiming at a typical inclination angles, the aircraft tail rotation angle experiment was simulated, and experiment achieved angle measurement arranging from-90°-90°. Experiment results demonstrate that when the inclination is close to the real inclination of aircraft tail wing, the maximum error is 0.277°, less than 0.3°, which meets the requirement of measurement. For aircraft currently being used, the measurement method can achieve the angle measurement of aircraft tail wing rotating effectively.

Sign in / Sign up

Export Citation Format

Share Document