A two-dimensional force-measuring device based on a two-end-fixed quartz tuning fork and a method thereof

A technology of quartz tuning fork and force measuring device, which is applied in the measurement of the property and force of piezoelectric devices, etc., can solve the problems of system Q value reduction, bulky isolation system, dynamic balance breaking, etc., to improve stiffness and stability, simplify The structure of the force measuring device and the effect of improving the measurement sensitivity

Active Publication Date: 2016-02-10
NANJING UNIV OF INFORMATION SCI & TECH
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Problems solved by technology

However, if two-dimensional force measurement needs to be coupled with other structures at the open end, its dynamic balance will be broken and the Q value of the system will decrease
In order to improve the Q value, a relatively bulky isolation system needs to be added to the design

Method used

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  • A two-dimensional force-measuring device based on a two-end-fixed quartz tuning fork and a method thereof
  • A two-dimensional force-measuring device based on a two-end-fixed quartz tuning fork and a method thereof
  • A two-dimensional force-measuring device based on a two-end-fixed quartz tuning fork and a method thereof

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Embodiment Construction

[0026] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0027] see figure 1 , a two-dimensional force measuring device based on a double-ended fixed quartz tuning fork 2 of the present invention includes two main parts of a mechanical system and an electrical circuit system. Among them, the mechanical system includes a double-ended fixed quartz tuning fork 2 and its bracket, a vibration generator 3 (a piezoelectric ceramic is used specifically) and a measuring probe 4 (a metal probe is used specifically), a Doppler vibration test Instrument 5 and piezoelectric fretting test bench 6. The circuit system includes a first sinusoidal signal generator 7 , a second sinusoidal signal generator 8 , a signal conditioning circuit 9 , a first lock-in amplifier 10 , a second lock-in amplifier 11 , a data acquisiti...

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Abstract

The invention provides a two-dimensional force-measuring device based on a two-end-fixed quartz tuning fork and a method thereof. The device comprises a support, a quartz tuning fork, a vibration generator, a measuring probe, a Doppler vibration measuring instrument, a piezoelectric micro-motion experiment table, a first sinusoidal signal generator, a second sinusoidal signal generator, a signal conditioning circuit, a first phase lock amplifier, a second phase lock amplifier, a data acquisition module and a computer. The method comprises the steps of placing a to-be-measured sample on the piezoelectric micro-motion experiment table; adjusting the distance between the piezoelectric micro-motion experiment table and the measuring probe; adjusting the vibration frequency and amplitude of the first sinusoidal signal generator and the second sinusoidal signal generator; continuously adjusting the height of the piezoelectric micro-motion experiment table to make the piezoelectric micro-motion experiment table approach the measuring probe at set speed; recording the vibration amplitude and phase change information by the computer; calculating the axial force Fn and the horizontal shear force FS. The device and the method can realize the two-dimensional force measurement of the axial force and the shear force of liquid phase substances; higher Q values can be obtained and higher sensitivity can be obtained.

Description

technical field [0001] The invention relates to a measuring device and method for axial force and shear force of a liquid-phase material, in particular to a two-dimensional force measuring device and method based on a double-ended fixed quartz tuning fork. Background technique [0002] In mechanical transmission, fluid lubricants such as rolling bearings play an important role in isolating friction pairs, reducing wear and prolonging mechanical life. With the precision and high-speed development of mechanical equipment, the requirements for its working environment and conditions are becoming increasingly stringent, the thickness of the lubricating film in the mechanism is continuously decreasing, and the requirements for lubricating performance are increasing. The change of axial force and shear force during lubricant work can reflect the lubricating effect of lubricant, so the measurement of axial force and shear force is an important means to study the performance of lubri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/16
Inventor 刘卿卿苗国英
Owner NANJING UNIV OF INFORMATION SCI & TECH
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