CN106404566A - Bed fatigue test controller for light, mechanical and electronic integration medical instrument - Google Patents
Bed fatigue test controller for light, mechanical and electronic integration medical instrument Download PDFInfo
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- CN106404566A CN106404566A CN201611144069.7A CN201611144069A CN106404566A CN 106404566 A CN106404566 A CN 106404566A CN 201611144069 A CN201611144069 A CN 201611144069A CN 106404566 A CN106404566 A CN 106404566A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0062—Crack or flaws
- G01N2203/0066—Propagation of crack
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a bed fatigue test controller for a light, mechanical and electronic integration medical instrument, belonging to the technical field of light, mechanical and electronic integration. The bed fatigue test controller comprises a base, wherein support pillars are respectively arranged on the left side and the right side of the bottom part of the base; support frames are respectively arranged on the left side and the right side of the top part of the base. Compared with an existing bed fatigue test controller for the light, mechanical and electronic integration medical instrument, the bed fatigue test controller for the light, mechanical and electronic integration medical instrument, provided by the invention, adopts ultrasonic fatigue testing; compared with other fatigue testing machines, the test frequency of an ultrasonic fatigue testing machine is larger, so that a test result is more accurate; in addition, on the basis of the existing bed fatigue test controller for the mechanical and electronic integration medical instrument, an image acquisition sub-system and an image analysis sub-system are added, so that a direction and speed of crack propagation of a sample can be analyzed and calculated through real-time monitoring the sample when the sample is subjected to fatigue test, the force analysis is cooperatively carried out on the sample, and thus analyzed data is more accurate.
Description
Technical field
The present invention relates to photoelectricity machine integrated technique field, specially a kind of optical, mechanical and electronic integration medical apparatus and instruments are tired with bed body
Labor test controller.
Background technology
Fatigue machine is used for test material by repeating or when alternate stress is acted on, through multiple cyclic test
Afterwards, whether can occur suddenly to rupture in the case of there is no notable appearance deformation.Statistical data shows, aeronautical engineering there are about
Caused due to the fatigue rupture of structural material during 60%～80% fracture.Because current technology there is no method theoretically to come
Strength character under variable load effect for the prediction material, so can only the temporary transient fatigue limit under variable load using material
Substitute this index of resistance to vibration performance with fatigue life.Fatigue test is widely used in Aero-Space, automobile, ship, smelting
The industries such as gold, building, closely related with product quality and personal safety.Thus it is guaranteed that the value of fatigue machine accurately has
Very important meaning, medical hospital bed classification has many kinds, specifically has following mode classification：Divide by material, ABS can be divided into cure
With sick bed, all steel is medical hospital bed, semi-stainless steel is medical hospital bed, all-steel plastic-blasting is medical hospital bed etc., in medical hospital bed use
Before, it is required for carrying out testing fatigue to sick bed, general medical devices bed body fatigue machine is in the only stress to sample
Data is acquired analyzing, and the crackle change sample not produced in stress is acquired and analyzes so that obtaining after analyzing
The data going out is not accurate enough, for this reason, a kind of it is proposed that optical, mechanical and electronic integration medical apparatus and instruments bed body fatigue test controller.
Content of the invention
It is an object of the invention to provide a kind of optical, mechanical and electronic integration medical apparatus and instruments bed body fatigue test controller, to solve
The general medical devices bed body fatigue machine certainly proposing in above-mentioned background technology is only entering to the stress data of sample
Row collection analysises, and the crackle change sample not produced in stress is acquired and analyzes the number so that drawing after analyzing
According to not accurate enough problem.
For achieving the above object, the present invention provides following technical scheme：A kind of optical, mechanical and electronic integration medical apparatus and instruments bed body
Fatigue test controller, including base, the bottom left and right sides of described base is provided with support column, the top left of described base
Right both sides are provided with bracing frame, and the right side wall of left side support frame as described above is provided with supersonic generator, right side support frame as described above
Left side wall be provided with video camera, the top of two groups of support frames as described above is provided with lightweight crosshead, the top of described lightweight crosshead
Portion is provided with hydraulic cylinder, and hydraulic cylinder runs through lightweight crosshead, and the bottom of described hydraulic cylinder is provided with connecting seat, described connecting seat
Bottom be provided with piezoelectric ceramic transducer, the bottom of described piezoelectric ceramic transducer is provided with the first displacement amplifier, described
The bottom of the first displacement amplifier is provided with sample, and the bottom of described sample is provided with second displacement amplifier, described second
The bottom of shift amplifier is provided with fixed seat, and the right side wall of described lightweight crosshead is provided with start button, described lightweight cross
The left side wall of head is provided with display, and described display electrically inputs connection driver element, the described driver element electrically company of input
Connect central processing unit, described central processing unit is electrically bi-directionally connected data collecting system data analysis system, described number respectively
Include image acquisition subsystem and sample stress data acquisition subsystem according to acquisition system, described data analysis system includes figure and divides
Analysis subsystem and sample stress data analyzing subsystem.
Preferably, the axis of the axis of described supersonic generator, the axis of video camera and sample is in same
On horizontal line.
Preferably, described image acquisition subsystem includes video camera, and described video camera electrically exports connection image acquisition list
Unit, described image collecting unit electrically exports connection processor, and described processor electrically exports connection graphics processing unit, described
Graphics processing unit electrically exports connection A/D converting unit, and described A/D converting unit electrically exports connection image storage unit.
Preferably, described sample stress data acquisition subsystem includes data acquisition unit, and described data acquisition unit divides
Not electrically input does not connect the first displacement amplifier and second displacement amplifier, and described data acquisition unit electrically exports the micro- place of connection
Reason device, described microprocessor electrically exports connection data processing unit, and described data processing unit electrically exports connection data and deposits
Storage unit.
Preferably, described image analyzing subsystem includes image data extraction unit, described image data extracting unit electricity
Property output connection figure as data-optimized unit, the data-optimized unit of described image electrically exports connection controller, described controller
Electrically it is bi-directionally connected image characteristics extraction unit and image segmentation unit respectively, it is single that described controller electrically exports connection contrast
Unit, described comparison unit electrically exports linking parsing data record unit.
Preferably, described sample stress data analyzing subsystem includes data extracting unit, described data extracting unit electricity
Property output connect data screening unit, described data screening unit electrically exports connection server, and described server electrically exports
Connect computing unit, described computing unit electrically exports connection data analysis unit, the described data analysis unit electrically company of output
Connect judging and deducing unit, described judging and deducing unit electrically exports connection data feedback unit.
Compared with prior art, the invention has the beneficial effects as follows：With existing optical, mechanical and electronic integration medical apparatus and instruments bed body
Fatigue test controller is compared, and the present invention uses ultrasonic fatigue testing, relatively other fatigue testers is compared, ultrasonic tired
The test frequency of labor test machine is bigger so that the result of test is more accurate, and the present invention cures in existing optical, mechanical and electronic integration
Image acquisition subsystem and map analysis subsystem is increased, by examination on the basis for the treatment of apparatus bed body fatigue test controller
Sample during sample testing fatigue carries out real-time monitoring, the propagation direction of sample crackle and spreading rate can be analyzed count
Calculate, coordinate the force analysis to sample so that the data after analysis is more accurate.
Brief description
Fig. 1 is present configuration schematic diagram；
Fig. 2 is principle of the invention block diagram；
Fig. 3 is image acquisition subsystem theory diagram of the present invention；
Fig. 4 is inventive samples stress data acquisition subsystem theory diagram；
Fig. 5 is image analysis subsystem theory diagram of the present invention；
Fig. 6 is inventive samples stress data analyzing subsystem theory diagram.
In figure：1 base, 2 support columns, 3 bracing frames, 4 supersonic generators, 5 video cameras, 6 lightweight crossheads, 7 hydraulic cylinders,
8 connecting seats, 9 piezoelectric ceramic transducers, 10 first displacement amplifiers, 11 samples, 12 second displacement amplifiers, 13 fixed seats, 14
Start button, 15 display, 16 driver elements, 17 central processing units, eighteen data acquisition system, 19 data analysis systems, 20 figures
As acquisition subsystem, 201 image acquisition units, 202 processors, 203 graphics processing units, 204A/D converting unit, 205 images
Memory element, 21 sample stress data acquisition subsystems, 211 data acquisition units, 212 microprocessors, 213 data processing lists
Unit, 214 data storage elements, 22 map analysis subsystems, 221 image data extraction units, 222 view data optimize units, 223
Controller, 224 image characteristics extraction units, 225 image segmentation unit, 226 comparison units, 227 analytical data recording units, 23
Sample stress data analyzing subsystem, 231 data extracting unit, 232 data screening units, 233 servers, 234 computing units,
235 data analysis unit, 236 reasoning and judging units, 237 data feedback units.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of protection of the invention.
Refer to Fig. 1-6, the present invention provides a kind of technical scheme：A kind of optical, mechanical and electronic integration medical apparatus and instruments bed body fatigue
Test controller, including base 1, the bottom left and right sides of base 1 is provided with support column 2, and support column 2 plays support to base
Effect, the top left and right sides of base 1 is provided with bracing frame 3, lightweight crosshead 6 is supported act on, Left-side support frame 3
Right side wall be provided with supersonic generator 4, supersonic generator 4 sends ultrasound wave, ultrasound wave to sample 11 generation act on, from
And sample is vibrated, the left side wall of Right side support frame 3 is provided with video camera 5, video camera 5 vibration to sample in real time and
Crackle is monitored, and the top of two groups of bracing frames 3 is provided with lightweight crosshead 6, and hydraulic cylinder 7 is fixed, lightweight crosshead 6
Top be provided with hydraulic cylinder 7, and hydraulic cylinder 7 runs through lightweight crosshead 6, and hydraulic cylinder 7 is played a supporting role to connecting seat 8, also
Sample 11 can be positioned, the bottom of hydraulic cylinder 7 is provided with connecting seat 8, and the bottom of connecting seat 8 is provided with piezoelectric ceramics and changes
Energy device 9, the signal of telecommunication that power supply sends is converted into piezoelectric ceramic transducer 9 vibration signal so that sample 11 followed by piezoelectricity pottery
Porcelain transducer 9 is vibrated, and the bottom of piezoelectric ceramic transducer 9 is provided with the first displacement amplifier 10, the first displacement amplifier
10 bottom is provided with sample 11, and the bottom of sample 11 is provided with second displacement amplifier 12, by the first displacement amplifier 10
With second displacement amplifier 12 to the effect of sample 11 so that the displacement of sample 11 intermediate cross-section is zero, stress is maximum, sample 11
The stress at two ends is zero, and displacement is maximum, so easily facilitates the first displacement amplifier 10 and second displacement amplifier 12 to sample
The displacement at 11 two ends is sensed, and the bottom of second displacement amplifier 12 is provided with fixed seat 13, and fixed seat 13 is to second displacement
Amplifier 12 is played a supporting role, and the right side wall of lightweight crosshead 6 is provided with start button 14, the left side wall of lightweight crosshead 6
It is provided with display 15, display 15 electrically inputs connection driver element 16, driver element 16 electrically inputs connection central authorities and processes
Device 17, central processing unit 17 is electrically bi-directionally connected data collecting system 18 data analysis system 19, data collecting system respectively
18 include image acquisition subsystem 20 and sample stress data acquisition subsystem 21, and data analysis system 19 includes map analysis subsystem
System 22 and sample stress data analyzing subsystem 23, the first control data acquisition system 18 of central processing unit 17 carries out data acquisition work
Make, data collecting system 18 passes through image acquisition subsystem 20 and sample stress data acquisition subsystem 21 respectively respectively to sample
11 carry out realtime image data during testing fatigue and the stress data of sample 11 is acquired, then pass through data analysis system 19
The data that data collecting system 18 collection is come is analyzed processing, and data analysis system 19 control figure analyzing subsystem 22 is to figure
As data is analyzed processing, to observe sample 11 sample 11 when carrying out testing fatigue and to occur the trend of crackle and crackle to expand
Speed, data analysis system 19 control sample stress data analyzing subsystem 23 stress data of sample 11 is analyzed,
Judge whether sample 11 meets the use requirement of testing fatigue, by input block 24 input sample stress data analyzing subsystem
23 are carrying out the contrast numerical benchmark needed for force analysis.
Wherein, the axis of the axis of supersonic generator 4, the axis of video camera 5 and sample 11 is in same water
So that the image photographing sample 11 surface that can become apparent from of video camera 5 on horizontal line, supersonic generator 4 can be more preferable
Ultrasonic excitation process is carried out to sample 11；
Image acquisition subsystem 20 includes video camera 5, and video camera 5 electrically exports connection image acquisition units 201, and image is adopted
Collection unit 201 electrically exports connection processor 202, and processor 202 electrically exports connection graphics processing unit 203, image procossing
Unit 203 electrically exports connection A/D converting unit 204, and A/D converting unit 204 electrically exports connection image storage unit 205,
Image acquisition subsystem 20 expands change by sample 11 face crack that image acquisition units 201 photograph to video camera 5
View data is acquired, and the data collecting passes to graphics processing unit 203 by processor 202 and carries out image procossing,
Graphics processing unit 203 to collection come image carried out except noise and image enhancement processing, then by process after picture number
According to passing to A/D converting unit 204, A/D converting unit 204 carries out data conversion treatment again to the data after processing, by image
Data message is converted into the image data format being easy to store and transmit；
Sample stress data acquisition subsystem 21 includes data acquisition unit 211, and data acquisition unit 211 is electrically defeated respectively
Enter to connect the first displacement amplifier 10 and second displacement amplifier 12, the electrical output connecting microprocessor of data acquisition unit 211
212, microprocessor 212 electrically exports connection data processing unit 213, and data processing unit 213 electrically exports connection data and deposits
Storage unit 214, sample stress data acquisition subsystem 21 passes through data acquisition unit 211 respectively to the first displacement amplifier 10 He
Data on second displacement amplifier 12 is acquired, and the first displacement amplifier 10 and second displacement amplifier 12 are respectively to sample
The stress intensity at 11 two ends is sensed, and the data after collection passes to data processing unit 213 by microprocessor 212 and carries out
Data processing, the data that data processing unit 213 comes to collection is entered row format conversion, coding and compression and is processed, the number after process
Store according to by the data that data storage cell 214 comes to collection；
Image analysis subsystem 22 includes image data extraction unit 221, the image data extraction unit 221 electrically company of output
As data-optimized unit 222, view data optimizes unit 222 and electrically exports connection controller 223, and controller 222 is respectively for map interlinking
Electrically it is bi-directionally connected image characteristics extraction unit 224 and image segmentation unit 225, it is single that controller 223 electrically exports connection contrast
Unit 226, comparison unit 226 electrically exports linking parsing data record unit 227, and image analysis subsystem 22 passes through view data
Extraction unit 221 carries out the next view data of image acquisition subsystem 20 collection and is extracted, and the data after extraction first passes through figure
As data-optimized unit 222 is optimized process to the data extracted, optimization processing includes light filling, amplification, removes the processes such as color, excellent
To controller 223, controller 223 first controls image segmentation unit 225 to the number after optimization processing to data transfer after change process
According to carrying out dividing processing, provide view data for image characteristics extraction, the image feedback after segmentation is to controller 223, then passes through
Controller 223 controls image feature extraction unit 224 to carry out feature extraction to the image after segmentation, extracts different time and shoots
Sample 11 surface image, the data feedback after extraction to controller 223, then by comparison unit 226 contrast different time under
The image on sample 11 surface, to observe the expansion change of the crackle on sample 11 surface under different time, the data transfer after contrast
Carry out data record to analytical data recording unit 227, be easy to later stage researcher and sample 11 testing fatigue is analyzed；
Sample stress data analyzing subsystem 23 includes data extracting unit 231, the data extracting unit 231 electrically company of output
Connect data screening unit 232, data screening unit 232 electrically exports connection server 233, server 233 electrically exports connection
Computing unit 234, computing unit 234 electrically exports connection data analysis unit 235, the data analysis unit 235 electrically company of output
Connect judging and deducing unit 236, judging and deducing unit 236 electrically exports connection data feedback unit 237, sample stress data is analyzed
Subsystem 23 is extracted by the data that data extracting unit 231 is come to sample stress data acquisition subsystem 21 collection, carries
Data after taking is screened by data screening unit 232, filters out synchronization the first displacement amplifier 10 and second
Sample 11 stress data that shift amplifier 12 senses, the data that or not first displacement amplifier 10 does not sense in the same time, when different
Carve the data that second displacement induction apparatuss 12 sense, the data after screening passes to computing unit 234 by server 233 and carries out
Data calculates, and by specific algorithm, the bending stiffness of sample 11, resonance length, displacement amplitude is calculated, after calculating
Data transfer carries out data analysiss to data analysis unit 235, the contrast base that the data after calculating and input block 24 are inputted
Quasi- numerical value is analyzed, and the data after relative analyses makes inferences judgement by reasoning and judging unit 236, after judging to calculate
Data whether in the range of the contrast numerical benchmark of input block 24 input, the data after judging and deducing passes through data feedback again
Unit 237 feeds back to central processing unit 17, processes 17 finally by central authorities and controls driver element 16 to drive display 15, will feed back
Data display afterwards is out.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, permissible
Understand and can carry out multiple changes, modification, replacement to these embodiments without departing from the principles and spirit of the present invention
And modification, the scope of the present invention be defined by the appended.
Claims (6)
1. a kind of optical, mechanical and electronic integration medical apparatus and instruments bed body fatigue test controller, including base (1) it is characterised in that：Institute
The bottom left and right sides stating base (1) is provided with support column (2), and the top left and right sides of described base (1) is provided with props up
Support (3), the right side wall of left side support frame as described above (3) is provided with supersonic generator (4), a left side for right side support frame as described above (3)
Side wall is provided with video camera (5), and the top of two groups of support frames as described above (3) is provided with lightweight crosshead (6), described lightweight crosshead
(6) top is provided with hydraulic cylinder (7), and hydraulic cylinder (7) runs through lightweight crosshead (6), the bottom setting of described hydraulic cylinder (7)
There is connecting seat (8), the bottom of described connecting seat (8) is provided with piezoelectric ceramic transducer (9), described piezoelectric ceramic transducer (9)
Bottom be provided with the first displacement amplifier (10), the bottom of described first displacement amplifier (10) is provided with sample (11), institute
The bottom stating sample (11) is provided with second displacement amplifier (12), and the bottom of described second displacement amplifier (12) is provided with admittedly
Reservation (13), the right side wall of described lightweight crosshead (6) is provided with start button (14), the left side of described lightweight crosshead (6)
Wall is provided with display (15), and electrically input connects driver element (16), described driver element (16) electricity to described display (15)
Property input connect central processing unit (17), described central processing unit (17) be electrically bi-directionally connected respectively data collecting system (18) and
Data analysis system (19), described data collecting system (18) includes image acquisition subsystem (20) and the collection of sample stress data
Subsystem (21), described data analysis system (19) includes map analysis subsystem (22) and sample stress data analyzing subsystem
(23).
2. a kind of optical, mechanical and electronic integration medical apparatus and instruments bed body fatigue test controller according to claim 1, its feature
It is：The axis of the axis, the axis of video camera (5) and sample (11) of described supersonic generator (4) is in same
On horizontal line.
3. a kind of optical, mechanical and electronic integration medical apparatus and instruments bed body fatigue test controller according to claim 1, its feature
It is：Described image acquisition subsystem (20) includes video camera (5), and electrically output connects image acquisition list to described video camera (5)
First (201), electrically output connects processor (202) to described image collecting unit (201), and described processor (202) electrically exports
Connect graphics processing unit (203), electrically output connects A/D converting unit (204) to described image processing unit (203), described
Electrically output connects image storage unit (205) to A/D converting unit (204).
4. a kind of optical, mechanical and electronic integration medical apparatus and instruments bed body fatigue test controller according to claim 1, its feature
It is：Described sample stress data acquisition subsystem (21) includes data acquisition unit (211), described data acquisition unit
(211) electrically input connects the first displacement amplifier (10) and second displacement amplifier (12), described data acquisition unit respectively
(211) electrical output connecting microprocessor (212), electrically output connects data processing unit to described microprocessor (212)
(213), described data processing unit (213) electrically output connection data storage cell (214).
5. a kind of optical, mechanical and electronic integration medical apparatus and instruments bed body fatigue test controller according to claim 1, its feature
It is：Described image analyzing subsystem (22) includes image data extraction unit (221), described image data extracting unit
(221) electrically export connection figure as data-optimized unit (222), electrically output connects the data-optimized unit of described image (222)
Controller (223), described controller (222) is electrically bi-directionally connected image characteristics extraction unit (224) and image segmentation list respectively
First (225), electrically output connects comparison unit (226) to described controller (223), and the electrical output of described comparison unit (226) is even
Connect analytical data recording unit (227).
6. a kind of optical, mechanical and electronic integration medical apparatus and instruments bed body fatigue test controller according to claim 1, its feature
It is：Described sample stress data analyzing subsystem (23) includes data extracting unit (231), described data extracting unit
(231) electrically output connects data screening unit (232), and described data screening unit (232) electrically exports connection server
(233), described server (233) electrically output connection computing unit (234), electrically output connects described computing unit (234)
Data analysis unit (235), described data analysis unit (235) electrically exports connection judgment reasoning element (236), described judgement
Electrically output connects data feedback unit (237) to reasoning element (236).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611144069.7A CN106404566A (en) | 2016-12-13 | 2016-12-13 | Bed fatigue test controller for light, mechanical and electronic integration medical instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611144069.7A CN106404566A (en) | 2016-12-13 | 2016-12-13 | Bed fatigue test controller for light, mechanical and electronic integration medical instrument |
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| CN201611144069.7A Pending CN106404566A (en) | 2016-12-13 | 2016-12-13 | Bed fatigue test controller for light, mechanical and electronic integration medical instrument |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108333181A (en) * | 2018-01-08 | 2018-07-27 | 苏州中汽检测技术服务有限公司 | A kind of full-automatic quality detecting system for fatigue test specimen |
| CN109100128A (en) * | 2018-08-17 | 2018-12-28 | 麒盛科技股份有限公司 | Simulate the intelligent bed ageing cycle test method and system of load-bearing |
| CN109959505A (en) * | 2019-04-10 | 2019-07-02 | 浙江科惠医疗器械股份有限公司 | A kind of endurance testing device and life-span test system |
| CN111323317A (en) * | 2020-04-13 | 2020-06-23 | 北京大学 | High-frequency fatigue test device and method based on piezoelectric double-stack resonance driving |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109100128A (en) * | 2018-08-17 | 2018-12-28 | 麒盛科技股份有限公司 | Simulate the intelligent bed ageing cycle test method and system of load-bearing |
| CN109959505A (en) * | 2019-04-10 | 2019-07-02 | 浙江科惠医疗器械股份有限公司 | A kind of endurance testing device and life-span test system |
| CN111323317A (en) * | 2020-04-13 | 2020-06-23 | 北京大学 | High-frequency fatigue test device and method based on piezoelectric double-stack resonance driving |
| CN111323317B (en) * | 2020-04-13 | 2020-12-22 | 北京大学 | High-frequency fatigue test device and method based on piezoelectric double-stack resonance driving |
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