Novel laser Doppler tachometer Download： 678次 | Chinese Optics Letters -- 中国光学期刊网

Chinese Optics Letters, 2021, 19 (1): 011201, Published Online: Dec. 7, 2020

Novel laser Doppler tachometer Download： 678次

Wentao Li Jian Zhou ^*

Author Affiliations

College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China

Figures & Tables

Fig. 1. Structure of the novel rotational speed measuring device.

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Fig. 2. Geometric relationships of the two beams and the measured rotating body.

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Fig. 3. Rotational speed measuring system from different perspectives.

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Fig. 4. Results of rotational speed measurement: (a) 200 deg/s, (b) 600 deg/s, and (c) 1200 deg/s.

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Fig. 5. Photo of radius sensitivity experiment: (a) a piece of foam, (b) two pieces of foam.

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Fig. 6. Results of rotational speed measurement: (a) no foam, (b) a piece of foam, and (c) two pieces of foam.

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Fig. 7. Photo of angle sensitivity experiment.

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Fig. 8. Results of rotational speed measurement: (a) deflection 0 deg, (b) deflection 5 deg, and (c) deflection 10 deg.

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Fig. 9. Measurement results under four working conditions.

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Fig. 10. Measurement results of the hand-held tachometer.

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Fig. 11. Measurement result of the vibration influence.

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Table1. Main Performance Parameters of Main Components

Parameter		Value
Laser	Wavelength/nm	532
	Power/mW	50
	Mode	Single longitudinal mode
Photodetector		APD
Sampling frequency/MHz		100
Measuring range/(deg/s)		4−8400
Distance $d$ /mm		12

Wentao Li, Jian Zhou. Novel laser Doppler tachometer[J]. Chinese Optics Letters, 2021, 19(1): 011201.

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