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Modeling and experiment of ultrasonic resonant Braille display cell’s squeeze film
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Qi-xiao ZHAO1, Guo-ping LI1, Kai HAN1, Si-tong XIANG1, Yan-ding Wei2, Jun-qiang LOU1, 2
Journal of Vibration Engineering | 2024, 37(2) : 218 - 225
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Journal of Vibration Engineering | 2024, 37(2): 218-225
Modeling and experiment of ultrasonic resonant Braille display cell’s squeeze film
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Qi-xiao ZHAO1, Guo-ping LI1, Kai HAN1, Si-tong XIANG1, Yan-ding Wei2, Jun-qiang LOU1, 2
Affiliations
  • 1Faculty of Mechanical Engineering and Mechanics, Ningbo University, Ningbo 315211, China
  • 2Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province, Zhejiang University, Hangzhou 310027, China
Published: 2024-02-28 doi: 10.16385/j.cnki.issn.1004-4523.2024.02.004
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At present，traditional Braille books have had difficulty meeting the needs of the blind，this paper proposes a new type of ultrasonic resonant Braille display cell based on the squeeze film generated by ultrasonic vibration. The Reynolds equation which determines the aerodynamic characteristics of the squeeze film is derived theoretically，the mechanical model and approximate solution of the output buoyancy are obtained by using the “piston effect” of the squeeze film，the vibration characteristics and output performance test of Braille display cell were tested using the built experimental platform. The results show that the resonant frequency of the Braille display cell is 30.8 kHz，when the peak-to-peak value of the excitation voltage is 130 Vpp to 200 Vpp，a stable squeeze film with certain buoyancy can be formed. The theoretical calculation results are basically consistent with the experimental results. In the experiment，three kinds of samples can be lifted from 13.92 μm to 47.71 μm，Braille display cell has sufficient output performance.

ultrasonic vibration  /  Braille display  /  piezoelectric actuator  /  squeeze film effect
Qi-xiao ZHAO, Guo-ping LI, Kai HAN, Si-tong XIANG, Yan-ding Wei, Jun-qiang LOU. Modeling and experiment of ultrasonic resonant Braille display cell’s squeeze film[J]. Journal of Vibration Engineering, 2024 , 37 (2) : 218 -225 . DOI: 10.16385/j.cnki.issn.1004-4523.2024.02.004
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Article Info
doi: 10.16385/j.cnki.issn.1004-4523.2024.02.004
  • Receive Date：2022-05-30
  • Online Date：2026-02-10
  • Published：2024-02-28
Article Data
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History
  • Received：2022-05-30
  • Revised：2022-07-18
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    1Faculty of Mechanical Engineering and Mechanics, Ningbo University, Ningbo 315211, China
    2Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province, Zhejiang University, Hangzhou 310027, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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