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Fatigue Life Test Setup for Implantable Electrical Stimulator Lead System

A technology of fatigue life and testing equipment, which is applied in the direction of measuring equipment, using repeated force/pulsation force to test the strength of materials, instruments, etc., can solve the problems of affecting test results and bending fatigue life test interference, so as to reduce interference and improve accuracy degree of effect

Active Publication Date: 2019-09-20
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, during the test process, due to the inherent problems of the fatigue life tester mechanism, during the reciprocating swing of the motor spindle, the clamping end and the tensioning end of the sample to be tested will be displaced horizontally and vertically. The test prototype is subjected to tensile effects other than bending, thereby introducing stray loads, which interferes with the bending fatigue life test and affects the test results

Method used

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  • Fatigue Life Test Setup for Implantable Electrical Stimulator Lead System
  • Fatigue Life Test Setup for Implantable Electrical Stimulator Lead System
  • Fatigue Life Test Setup for Implantable Electrical Stimulator Lead System

Examples

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Effect test

Embodiment 1

[0042] Please also refer to Image 6 and Figure 7 , The fatigue life testing device 10 provided by the embodiment of the present invention includes a bias compensation device 100, a motor spindle 110 and a bending test fixture 120, the motor spindle 110 is used to drive the bending test fixture 120 to rotate, and the bias compensation device 100 uses The motor shaft 110 is used to control the movement trajectory of the motor shaft 110 to compensate the displacement offset of the motor shaft 110 in the horizontal and vertical directions during the bending process of the fatigue life test.

[0043] The bending test fixture 120 is connected with the motor spindle 110 of a stepping motor (not shown in the figure), and as the bending test fixture 120 is driven by the stepping motor to perform periodic reciprocating motions, the extension wire is periodically bent and fatigued. The main body of the bending test fixture 120 can be a rectangular body with a shaft hole (not shown in ...

Embodiment 2

[0047] Please also refer to Figure 8 , the fatigue life testing device 20 provided by the embodiment of the present invention includes a bias compensation device 200, a motor spindle 110 and a bending test fixture 120, and the bias compensation device 200 is used to control the movement track of the motor spindle 110 to compensate the motor spindle 110 Horizontal and vertical displacement offsets during bending for fatigue life testing. The bias compensation device 200 includes a double cam 202, a first follower 203, a second follower 204, and a translation platform 205. The double cam 202, the first follower 203, and the second follower 204 can be Installed on the frame 201, the translation platform 205 is driven by the double cam 202 and controlled by the first follower 203 and the second follower 204, moving along the first direction such as the horizontal direction and the second direction. Such as vertical reciprocating movement.

[0048] The double cam 202 can include...

Embodiment 3

[0051] see Figure 9 , the fatigue life testing device 30 provided by the embodiment of the present invention includes a bias compensation device 300, a motor spindle 110 and a bending test fixture 120, and the bias compensation device 200 is used to control the movement track of the motor spindle 110 to compensate the motor spindle 110 Horizontal and vertical displacement offsets during bending for fatigue life testing. The bias compensation device 300 includes a first slider 302 , a first screw 303 , a second slider 304 , a second screw 305 and a translation platform 306 disposed on the frame 301 . The first slider 302 can be threaded on the first lead screw 303 and slide along the first lead screw 303 in a "screw-nut" manner, and the first slider 302 can be positioned on the first lead screw 303 Driven to reciprocate in the horizontal direction. Similarly, the second slider 304 can be threaded on the second screw 305, and driven by the second screw 305, slides along the s...

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Abstract

The invention relates to a fatigue service life test device. The device comprises a bending test fixture which is used for holding a sample to be tested and bending the sample to be tested. The fatigue service life test device further comprises a bias compensation device. The bias compensation device is used for compensating the displacement path of clamped and tensioned ends, which are held in the bending test fixture, in the sample to be tested. The tensile force of the sample to be tested is constant during the bending process of the sample to be tested. According to the fatigue service life test device provided by the invention, the bias compensation device compensates the horizontal displacement and the vertical displacement of the sample to be tested; the introduction of stray load can be reduced or avoided; and the accuracy of a fatigue service life test is improved.

Description

technical field [0001] The invention relates to a fatigue life testing device, in particular to a fatigue life testing device for an implanted electric stimulator wire system, and belongs to the technical field of service life testing devices for components of implanted medical equipment. Background technique [0002] Implantable neurostimulators excite, inhibit or regulate the conduction of the nervous system through electrical stimulation, so as to achieve the therapeutic effect of restoring or improving the functioning of the human body. Implantable neurostimulation therapy has been proven to be effective in more than 20 neurological disorders. Compared with traditional drug methods and surgical damage methods, implantable neurostimulation therapy is safe and reversible, and is being used more and more clinically. According to different stimulation sites, implantable neurostimulators can be subdivided into deep brain stimulators, vagus nerve stimulators, spinal cord stim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00G01N3/38G01N3/02
Inventor 姜长青李霖泽李路明
Owner TSINGHUA UNIV