Source tracing calibrating device and source tracing method for micro cantilever beam elastic constant

A micro-cantilever and calibration device technology, applied in the intersection of nanotechnology and metrology, can solve problems such as inability to trace the elastic constant, and achieve the effect of ensuring uniformity, avoiding Abbe errors, and ensuring measurement accuracy.

Inactive Publication Date: 2014-03-05
TIANJIN UNIV
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  • Application Information

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Problems solved by technology

Some scholars have also proposed a plan to use light levers as displacement measurement, but since the light rod actually measures the deflection angle

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  • Source tracing calibrating device and source tracing method for micro cantilever beam elastic constant
  • Source tracing calibrating device and source tracing method for micro cantilever beam elastic constant
  • Source tracing calibrating device and source tracing method for micro cantilever beam elastic constant

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Embodiment Construction

[0013] The micro-cantilever elastic constant traceability calibration device and traceability method of the present invention will be described in conjunction with the accompanying drawings.

[0014] The traceability and calibration device for the elastic constant of the micro-cantilever beam of the present invention is based on the design idea of ​​the traceability calibration device based on the use of a polarization differential interferometer as the displacement measurement means of the free end of the micro-beam, and realizes the traceability with the length unit meter (m) in the International System of Units; As a means of force measurement, the nanobalance realizes the traceability with Newton (N), the unit of force in the International System of Units. The traceability method according to the traceability calibration device is characterized in that the force-displacement curve of the microcantilever is obtained through experiments, and then the elastic constant traceabi...

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Abstract

The invention provides a source tracing calibrating device for a micro cantilever beam elastic constant. The source tracing calibrating device structurally comprises a marble frame, a nanometer balance, a micro cantilever beam, a three-dimensional micro-nano displacement platform, a force loading rod, a polarization difference interferometer, an instrument controller, a computer and measuring and controlling software. The invention meanwhile provides a source tracing method of the source tracing calibrating device for the micro cantilever beam elastic constant. The source tracing calibrating device and source tracing method have the advantages that an elastic constant value can be directly traced to the international system of unit SI when the device is used, micro light spots, formed on the upper surface of the free end of the micro cantilever beam, of measuring light beams of the polarization difference interferometer completely coincide with force loading points when the lower surface of the free end of the micro cantilever beam is loaded by the force loading rod on the nanometer balance through the device, so that the Abbe arm is zero, the Abbe principle of displacement measuring is abided by, generation of Abbe errors is avoided, and the measurement accuracy of a source tracing instrument is ensured. Uniformity, reliability and comparability of micro force measuring by using the micro cantilever beam in different labs can be ensured.

Description

technical field [0001] The invention belongs to the intersecting field of nanotechnology and metrology, and relates to a traceability calibration device and a traceability method for the elastic constant of a micro-cantilever beam. Background technique [0002] The three-dimensional dimensions of the length, width and thickness of the micro-cantilever range from a few nanometers (nano-meter) to hundreds of micrometers (micro-meter). When in use, one end is generally fixed and the other end is free to form an elastic element. Microcantilever is an important sensing element on the micro-nano scale. It is often used as a force sensor to detect tiny physical, chemical and biological forces, and is also used to measure physical quantities such as temperature and medium viscosity. As an elastic sensing element, the micro-cantilever obeys Hooke's law, that is, F=kΔz, where k is the elastic constant of the micro-cantilever, and Δz is the displacement of the free end. It can be seen...

Claims

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Application Information

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IPC IPC(8): G01L25/00G01L27/00
Inventor 李艳宁文莉吴森陈治多伦雷丹特胡小唐
Owner TIANJIN UNIV
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