Scale factor calibration and dynamic angle measurement method based on self-collimator and fiber optic gyroscope

Mou, Jiapeng; Huang, Tengchao; Guo, Ying; Che, Shuangliang; Shu, Xiaowu

doi:10.1016/j.yofte.2019.101945

Cited by 5 publications

(1 citation statement)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Gears play an important role in the transmission chains of machine tools [6], and with the development of Industry 4.0, high-end equipment has led to the demand for higher requirements on the kinematic accuracy and positional feedback of the rotating shaft. In rotating machinery, laser interferometers [7,8], laser trackers [9,10], collimators [11] and displacement sensors [12] are usually used to realize precise positional feedback or angular error measurement. However, laser interferometers, laser trackers and optical polyhedral prisms are limited by their working principles and volumes when used for positional feedback, and usually need to be installed beside the machine to be measured.…”

Section: Introductionmentioning

confidence: 99%

Angular displacement sensor for gear position detection based on the tunneling magnetoresistance effect

Wang¹,

Qin²,

Chen³

et al. 2022

Meas. Sci. Technol.

View full text Add to dashboard Cite

In the fields of robotics, machine tools, and spacecraft, the measurement of the gear angular position lay the foundation for the closed-loop position feedback. In this article, an angular displacement sensor based on tunneling magneto-resistance effect is proposed for the precise angle displacement measurement. The developed sensor mainly consists of a tunneling magneto-resistance element, a signal conditioning circuit, a permanent magnet, and some necessary assembly components. The tunneling magnetoresistance element is composed of eight MTJs, which are arranged according to the dual-full bridge structure with the spatial electric angle difference of π/2. The signals containing time information and space information are obtained after the sinusoidal and cosine voltages signals are respectively connected in two Bridges. The signal is processed by a signal conditioning circuit, and then the angular displacement is measured via counting the clock pulses. The structure, working principles and signal conditioning method of the sensor are presented in detail. Moreover, a sensor prototype and a conditioning circuit are designed for the actual experiment, according to the measured gear with modulus of 1 and tooth number of 240. The prototype sensor has a theoretical resolution of 0.00001°. The experimental results show that the prototype sensor has a working stability of ±0.00023° within one hour, and its measurement accuracy is -0.0008611° to 0.001361° in the measurement range from 0° to 360°. Therefore, the proposed sensor can be well applied to the highly precise measurement of angular displacement.

show abstract