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Method and system for calibrating longitudinal vibration frequency of ultrasonic scalpel blade

A technology of longitudinal vibration and scalpel, which is applied in the field of ultrasonic scalpel, can solve the problems of single frequency adjustment method and limited adjustment range, and achieve the effect of expanding the frequency adjustment range and diversifying the frequency adjustment methods

Active Publication Date: 2020-10-02
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing method of adjusting the longitudinal vibration frequency of the blade of the ultrasonic scalpel includes setting a frequency adjustment structure near the node of the longitudinal vibration of the blade of the ultrasonic scalpel. In this method, the frequency adjustment method is single and the adjustment range is limited.

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  • Method and system for calibrating longitudinal vibration frequency of ultrasonic scalpel blade
  • Method and system for calibrating longitudinal vibration frequency of ultrasonic scalpel blade
  • Method and system for calibrating longitudinal vibration frequency of ultrasonic scalpel blade

Examples

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Embodiment 1

[0064] figure 1 It is a flow chart of the method for calibrating the longitudinal vibration frequency of the blade of the ultrasonic scalpel in Embodiment 1 of the present invention.

[0065] A method for calibrating the longitudinal vibration frequency of an ultrasonic scalpel blade, comprising:

[0066] Step 101: Create a finite element simulation model of the blade of the ultrasonic scalpel to be calibrated. The step 101 is specifically:

[0067] Establish the three-dimensional model of the ultrasonic scalpel blade to be calibrated in the three-dimensional modeling software;

[0068] Importing the three-dimensional model into finite element simulation software to obtain the finite element simulation model.

[0069] Step 102: Perform modal analysis on the finite element simulation model to obtain multi-order longitudinal vibration modes.

[0070] The natural frequency is extracted from the finite element simulation model of the ultrasonic scalpel to be calibrated, and th...

Embodiment 2

[0086] In this embodiment 2, a slender rod is used as the blade of the ultrasonic scalpel to describe the embodiment 1 in detail.

[0087] The material of this slender rod is medical titanium alloy TC4, and its material parameter is density ρ=4500kg / m 3 , Young's modulus E=1.1×10 11 Pa, Poisson's ratio μ=0.3. Of course, the material parameters of TC4 will vary due to the performance difference of the materials. This embodiment adopts the above material parameters to illustrate the method described in the present invention.

[0088] figure 2 It is a slender rod model diagram of Embodiment 2 of the present invention.

[0089] see figure 2 According to the theory of 1 / 2 wavelength, it is determined that the longitudinal vibration frequency is 55.5KHz, the length is 178mm, and the diameter is 3mm. One end of the slender rod is used as the coordinate origin, and the axial direction is set as the x-axis to establish a coordinate system.

[0090] A finite element simulation m...

Embodiment 3

[0117] Figure 11 It is a system structure diagram of the calibration system for the longitudinal vibration frequency of the blade of the ultrasonic scalpel in Embodiment 3 of the present invention.

[0118] see Figure 11 , the calibration system for the longitudinal vibration frequency of the ultrasonic scalpel bar, including:

[0119] The finite element simulation model creation module 301 is used to create a finite element simulation model of the ultrasonic scalpel blade to be calibrated;

[0120] A modal analysis module 302, configured to perform modal analysis on the finite element simulation model to obtain multi-order longitudinal vibration modes;

[0121] A mode selection module 303, configured to select the longitudinal vibration mode whose vibration frequency is closest to the target frequency range from the multi-order longitudinal vibration modes as the target mode;

[0122] A radial vibration displacement acquisition module 304, configured to acquire the radia...

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Abstract

The invention discloses a method and system for calibrating the longitudinal vibration frequency of an ultrasonic scalpel blade bar. The method includes: creating a finite element simulation model of the ultrasonic scalpel blade to be calibrated; performing modal analysis on the finite element simulation model to obtain a multi-order longitudinal vibration mode; selecting a vibration frequency and a target frequency range from the multi-order longitudinal vibration mode The closest longitudinal vibration mode is used as the target mode; obtain the radial vibration displacement of the finite element simulation model at each position in the axial direction under the target mode; determine multiple antinode positions of the radial vibration displacement; from multiple antinodes Select the position to be calibrated in the position, and change the size of the shaft section at the position to be calibrated until the natural frequency of the finite element simulation model is within the target frequency range; the size of the shaft section includes the length of the shaft section and the diameter of the shaft section. The method and system of the invention can expand the frequency adjustment range.

Description

technical field [0001] The invention relates to the field of ultrasonic scalpels, in particular to a method and system for calibrating the longitudinal vibration frequency of an ultrasonic scalpel blade. Background technique [0002] Ultrasonic scalpel quickly cuts biological tissue through high-frequency and large-amplitude vibration. It has the characteristics of smokeless operation, high cutting efficiency, minimally invasive, small side effects, and fast postoperative recovery, which is of great significance to reduce the pain of patients. Ultrasonic scalpels have been widely used in almost all surgical fields such as general surgery, cardiac surgery, thoracic surgery, and head and neck surgery. A large number of medical examples show that ultrasonic scalpels have important application value. [0003] During the manufacturing process of the ultrasonic scalpel, due to the difference in material properties, processing and assembly errors, etc., the longitudinal vibration f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01H1/14
CPCG01H1/14
Inventor 杨吟飞赵威曹峰李亮何宁
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS