CN203849207U - Ultrahigh frequency fatigue testing system - Google Patents
Ultrahigh frequency fatigue testing system Download PDFInfo
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- CN203849207U CN203849207U CN201420100673.XU CN201420100673U CN203849207U CN 203849207 U CN203849207 U CN 203849207U CN 201420100673 U CN201420100673 U CN 201420100673U CN 203849207 U CN203849207 U CN 203849207U
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Abstract
The utility model discloses an ultrahigh frequency fatigue testing system which comprises an ultrasonic generator, an ultrasonic transducer, an amplitude transformer and a stress loading device, wherein the ultrasonic generator is connected on the ultrasonic transducer to generate a drive signal; the ultrasonic transducer includes two exciting transducers and is connected to the amplitude transformer to convert the drive signal into an acoustic energy signal; the acoustic energy signal is amplified by the amplitude transformer; the stress loading device is over against the amplitude transformer. Because the ultrasonic transducer includes the two exciting transducers, the working frequency being 55KHz is higher in general ultrasonic frequency; the fatigue testing system, besides the function of meeting ultrahigh frequency fatigue tests of an ultrasonic scalpel, can be also popularized in fatigue tests with ultrahigh cycle, such as aeronautics and astronautics.
Description
Technical field
The utility model belongs to fatigue detecting and test field, and particularly a kind of frequency >20KHz can be used for minimally invasive ultrasound scalpel and carry out the ultrasonic fatigue pilot system of fatigue detecting.
Background technology
Wicresoft is that modern development in science and technology and surgery are innovated a kind of new medical science theory combining and form, and its objective is with minimum invasion and attack or damage and reaches best surgical treatment.There is wound little, hemorrhage few, recover fast, the developing rapidly and applying of the single hole Minimally Invasive Surgery of the advantages such as scar is little, not only open up broad space for the development of ultrasonic surgical blade, also ultrasonic surgical blade has been proposed to new challenge, that is: how to have improved the fatigue resistance of ultrasonic surgical blade simultaneously, promote the security of operation, extend the serviceable life of scalpel.
At present, the frequency of operation of conventional ultrasonic surgical blade is about 55kHz clinically, in p.s. approximately 5.5-10
4the duty of inferior dither, it is high but last shortly that its amplitude is about 50 μ m, circulation cycle, easily produces tiredly, causes surgical knife head fracture.How to be the key that solves its security to detecting the fatigue strength of supersonic operation.Fatigue detecting field, traditional servo-hydraulic experimental machine frequency is at 10-100Hz, but the high fatigue and cyclic cycle of material is between 10
5-10
7between, superelevation cycle exceedes 10 especially
8inferior, the time cost of fatigue detecting and financial cost have directly limited its application.And existing Ultrasonic Fatigue Test-Bed 20KHz left and right, due to self size and superelevation cycle fatigue damage feature of ultrasonic surgical blade, can not finely be suitable for.
Summary of the invention
The problem that the utility model solves is the low and problem that cannot carry out the torture test of the superelevation frequency of the frequency of operation of existing fatigue test system.
For addressing the above problem, the utility model provides a kind of ultrahigh frequency fatigue test system, and this system comprises ultrasonic generator, ultrasonic transducer, ultrasonic transformer and stress loading device, wherein, described ultrasonic generator is connected in described ultrasonic transducer, produces pumping signal; Described ultrasonic transducer is two excitation transducers and connects described ultrasonic transformer, and changing described pumping signal is acoustic energy signal; Described ultrasonic transformer amplifies acoustic energy signal; Described stress loading device and described ultrasonic transformer are just right.
In further scheme, described system also comprises laser vibration measurer and computer control system, wherein, laser vibration measurer measurement is connected in the vibration displacement of the tested sample of stress loading device and ultrasonic transformer, described computer control system is carried out PID calculating and is obtained control signal this vibration displacement, and described ultrasonic generator produces pumping signal according to this control signal.
In further scheme, described ultrasonic transformer is that the one-level ultrasonic transformer and the secondary ultrasonic transformer that are half-wavelength by length form secondary displacement structure for amplifying.
In further scheme, described system also comprises cooling system, and this cooling system comprises temperature-detecting device, processor and spraying plant, and wherein, described temperature-detecting device detects the temperature of tested sample and obtains actual temperature; Described processor comparison actual temperature and design temperature and obtain flow control signal and flow time signal; Described spraying plant, according to the unlatching size of flow control signal by-pass valve control, sprays refrigerating gas according to the opening time of flow time signal by-pass valve control to described tested sample.
In further scheme, described stress loading device comprises stress block, and this stress block is enclosed in cooling system, and length is half-wavelength.
In further scheme, described ultrasonic transformer is that the one-level ultrasonic transformer and the secondary ultrasonic transformer that are half-wavelength by length form secondary displacement structure for amplifying, described secondary ultrasonic transformer be closed in described cooling system and and described stress block between distance be a wavelength.
Compared with prior art, the utlity model has following advantage:
1, because ultrasonic transducer of the present utility model is two excitation transducers, like this, its frequency of operation >20KHz, such as being 55KHz, higher than general ultrasonic frequency, meet outside the ultrahigh frequency torture test of ultrasonic surgical blade, also may extend to the torture test of the superelevation cycles such as Aeronautics and Astronautics.
2, because described pilot system comprises laser vibration measurer and computer control system, like this, can regulate in real time the output of the excitation system of ultrasonic generator, make pilot system in optimum duty, and, realize the closed-loop control of " constant " amplitude output drive system, make amplitude " constant " degree be better than amplitude 10%.
3, because described pilot system comprises temperature-detecting device, processor and spraying plant, described processor comparison actual temperature and design temperature and obtain flow control signal and flow time signal, described spraying plant is according to the unlatching size of flow control signal by-pass valve control, spray refrigerating gas according to the opening time of flow time signal by-pass valve control to described tested sample, like this, can make tested sample environment temperature all the time at design temperature, prevented the impact of the temperature factor in its fatigue test of materials and guarantee test precision.
Brief description of the drawings
Fig. 1 is the theory diagram of the utility model ultrahigh frequency fatigue test system.
Embodiment
By describing technology contents of the present utility model, structural attitude in detail, being reached object and effect, below in conjunction with embodiment and coordinate accompanying drawing to be described in detail.
Refer to Fig. 1, the utility model ultrahigh frequency fatigue test system comprises ultrasonic generator 1, ultrasonic transducer 2, ultrasonic transformer 3, stress loading device 4, laser vibration measurer 5, computer control system 6 and cooling system 7.Described ultrasonic generator 1 is connected in described ultrasonic transducer 2, produces pumping signal.Described ultrasonic transducer 2 is two excitation transducers and connects described ultrasonic transformer 3, changing described pumping signal is that acoustic energy signal is vibrated described ultrasonic transformer 3, such as, this pair of excitation transducer can adopt has two groups of transducers that drive piezoelectric ceramic piece, adopt two excitation transducers can make that working band is wider, output amplitude is large, performance has very large lifting with respect to common transducer, meets the demand of ultrahigh frequency torture test.Described ultrasonic transformer 3 amplifies acoustic energy signal, and in the present embodiment, described ultrasonic transformer is the secondary displacement structure for amplifying being made up of one-level ultrasonic transformer 31 and secondary ultrasonic transformer 32, and the length of every one-level ultrasonic transformer is half-wavelength.One-level ultrasonic transformer is connected in described ultrasonic transducer 2.Secondary ultrasonic transformer 32 is connected in one end of tested sample 8.Described stress loading device 4 is just right with described ultrasonic transformer 3, is connected in the other end of tested sample 8, and like this, stress loading device 4, ultrasonic transformer 3 and tested sample 8 form resonator system.Stress loading device 4 has stress block, and the length of this stress block is half-wavelength, and in the time that above-mentioned ultrasonic transformer adopts secondary displacement structure for amplifying, the distance between this stress block and secondary ultrasonic transformer 32 is a wavelength.
Please continue to refer to Fig. 1, described laser vibration measurer 5 is measured the vibration displacement of the tested sample 8 that is connected in stress loading device 4 and ultrasonic transformer 3, described computer control system 6 is carried out PID calculating and is obtained control signal this vibration displacement, and described ultrasonic generator produces pumping signal according to this control signal.Computer control system 6 and laser vibration measurer 5 are accessed to test macro and form closed-loop system, like this, can regulate in real time the output of the excitation system of ultrasonic generator, make pilot system in optimum duty, realize the closed-loop control of " constant " amplitude output drive system, make amplitude " constant " degree be better than amplitude 10%.
Please continue to refer to Fig. 1, described cooling system comprises temperature-detecting device, processor and spraying plant, and wherein, described temperature-detecting device detects the temperature of tested sample and obtains actual temperature; Described processor comparison actual temperature and design temperature and obtain flow control signal and flow time signal; Described spraying plant, according to the unlatching size of flow control signal by-pass valve control, sprays refrigerating gas according to the opening time of flow time signal by-pass valve control to described tested sample.Adopt cooling system to prevent the impact of the temperature factor in its fatigue test of materials, guarantee the precision of testing; In addition, prevent that by gas-cooled mode tested sample 8 is corroded, also further guaranteed the precision of test.In the time having this cooling system, described secondary ultrasonic transformer is closed in this cooling system, and the stress block of described stress loading device 4 is closed in this cooling system.
Please continue to refer to Fig. 1, the course of work of the utility model ultrahigh frequency fatigue test system is as follows:
Ultrasonic generator 1 produces pumping signal.This pumping signal is converted to acoustic energy signal by ultrasonic transducer 2.Ultrasonic transformer 3 vibrates under this acoustic energy signal control, this vibration and tested sample 8 is vibrated, and stress loading device 4 can be measured the emergent property of tested sample 8, until tested sample fracture.Certainly,, in this process, if the temperature of tested sample 8 raises,, reduce temperature by described cooling system.In process of the test, the output of adjusting ultrasonic generator 1 by described computer control system 6 makes system works in optimum duty.
Claims (6)
1. ultrahigh frequency fatigue test system, is characterized in that: this system comprises ultrasonic generator, ultrasonic transducer, ultrasonic transformer and stress loading device, and wherein, described ultrasonic generator is connected in described ultrasonic transducer, produces pumping signal; Described ultrasonic transducer is two excitation transducers and connects described ultrasonic transformer, and changing described pumping signal is acoustic energy signal; Described ultrasonic transformer amplifies acoustic energy signal; Described stress loading device and described ultrasonic transformer are just right.
2. ultrahigh frequency fatigue test system as claimed in claim 1, it is characterized in that: described system also comprises laser vibration measurer and computer control system, wherein, laser vibration measurer measurement is connected in the vibration displacement of the tested sample of stress loading device and ultrasonic transformer, described computer control system is carried out PID calculating and is obtained control signal this vibration displacement, and described ultrasonic generator produces pumping signal according to this control signal.
3. ultrahigh frequency fatigue test system as claimed in claim 2, is characterized in that: described ultrasonic transformer is that the one-level ultrasonic transformer and the secondary ultrasonic transformer that are half-wavelength by length form secondary displacement structure for amplifying.
4. ultrahigh frequency fatigue test system as claimed in claim 1 or 2, it is characterized in that: described system also comprises cooling system, this cooling system comprises temperature-detecting device, processor and spraying plant, and wherein, described temperature-detecting device detects the temperature of tested sample and obtains actual temperature; Described processor comparison actual temperature and design temperature and obtain flow control signal and flow time signal; Described spraying plant, according to the unlatching size of flow control signal by-pass valve control, sprays refrigerating gas according to the opening time of flow time signal by-pass valve control to described tested sample.
5. ultrahigh frequency fatigue test system as claimed in claim 4, is characterized in that: described stress loading device comprises stress block, and this stress block is enclosed in cooling system, length is half-wavelength.
6. ultrahigh frequency fatigue test system as claimed in claim 5, it is characterized in that: described ultrasonic transformer is that the one-level ultrasonic transformer and the secondary ultrasonic transformer that are half-wavelength by length form secondary displacement structure for amplifying, described secondary ultrasonic transformer be closed in described cooling system and and described stress block between distance be a wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420100673.XU CN203849207U (en) | 2014-03-06 | 2014-03-06 | Ultrahigh frequency fatigue testing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420100673.XU CN203849207U (en) | 2014-03-06 | 2014-03-06 | Ultrahigh frequency fatigue testing system |
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| CN203849207U true CN203849207U (en) | 2014-09-24 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105334268A (en) * | 2015-12-15 | 2016-02-17 | 武汉钢铁(集团)公司 | Ultrasonic fatigue test vibration displacement monitoring device |
| CN105510443A (en) * | 2015-12-28 | 2016-04-20 | 四川大学 | Low-temperature ultrasonic vibration fatigue experiment system |
| CN106770674A (en) * | 2016-12-06 | 2017-05-31 | 大连理工大学 | A kind of ultrasonic cutter detecting method |
| CN107957448A (en) * | 2017-11-21 | 2018-04-24 | 西南石油大学 | A kind of ultrasonic fatigue mean stress loading device |
| CN108613871A (en) * | 2018-03-23 | 2018-10-02 | 东莞理工学院 | A kind of device and method of ultrasonic wave assisting tension |
| CN110411872A (en) * | 2019-07-29 | 2019-11-05 | 杭州嘉振超声波科技有限公司 | Ultrasonic wave fatigue tester |
| US11029286B2 (en) | 2016-12-06 | 2021-06-08 | Dalian University Of Technology | Ultrasonic cutter quality inspection method and device |
| CN113084167A (en) * | 2021-04-06 | 2021-07-09 | 哈尔滨工业大学 | Ultrasonic in-situ loading device for laser melting deposition forming |
| CN113203645A (en) * | 2021-05-12 | 2021-08-03 | 华东理工大学 | Ultrahigh cycle fatigue damage detection system and method based on nonlinear laser ultrasound |
| CN113790975A (en) * | 2021-09-14 | 2021-12-14 | 吉林大学 | Ultrasonic amplitude transformer assembly, ultrasonic fatigue loading test device and test method |
-
2014
- 2014-03-06 CN CN201420100673.XU patent/CN203849207U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105334268A (en) * | 2015-12-15 | 2016-02-17 | 武汉钢铁(集团)公司 | Ultrasonic fatigue test vibration displacement monitoring device |
| CN105510443A (en) * | 2015-12-28 | 2016-04-20 | 四川大学 | Low-temperature ultrasonic vibration fatigue experiment system |
| US11029286B2 (en) | 2016-12-06 | 2021-06-08 | Dalian University Of Technology | Ultrasonic cutter quality inspection method and device |
| CN106770674A (en) * | 2016-12-06 | 2017-05-31 | 大连理工大学 | A kind of ultrasonic cutter detecting method |
| CN106770674B (en) * | 2016-12-06 | 2019-04-12 | 大连理工大学 | A kind of ultrasound cutter detecting method |
| CN107957448A (en) * | 2017-11-21 | 2018-04-24 | 西南石油大学 | A kind of ultrasonic fatigue mean stress loading device |
| CN107957448B (en) * | 2017-11-21 | 2020-06-26 | 西南石油大学 | Ultrasonic fatigue average stress loading device |
| CN108613871A (en) * | 2018-03-23 | 2018-10-02 | 东莞理工学院 | A kind of device and method of ultrasonic wave assisting tension |
| CN110411872A (en) * | 2019-07-29 | 2019-11-05 | 杭州嘉振超声波科技有限公司 | Ultrasonic wave fatigue tester |
| CN113084167A (en) * | 2021-04-06 | 2021-07-09 | 哈尔滨工业大学 | Ultrasonic in-situ loading device for laser melting deposition forming |
| CN113203645A (en) * | 2021-05-12 | 2021-08-03 | 华东理工大学 | Ultrahigh cycle fatigue damage detection system and method based on nonlinear laser ultrasound |
| CN113203645B (en) * | 2021-05-12 | 2024-03-08 | 华东理工大学 | Ultra-high cycle fatigue damage detection system and method based on nonlinear laser ultrasound |
| CN113790975A (en) * | 2021-09-14 | 2021-12-14 | 吉林大学 | Ultrasonic amplitude transformer assembly, ultrasonic fatigue loading test device and test method |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140924 Termination date: 20150306 |
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| EXPY | Termination of patent right or utility model |