CN1580737A - Ultrasonic micro driving friction test system - Google Patents
Ultrasonic micro driving friction test system Download PDFInfo
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- CN1580737A CN1580737A CN 200410013767 CN200410013767A CN1580737A CN 1580737 A CN1580737 A CN 1580737A CN 200410013767 CN200410013767 CN 200410013767 CN 200410013767 A CN200410013767 A CN 200410013767A CN 1580737 A CN1580737 A CN 1580737A
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Abstract
This ultrasonic mini-driven friction tester comprises the electric charge amplifier, which is connected, with the electric charge ampifier and terminal block (60) by wire, and the terminal block is connected with mini-computer by the wire. This invention can equivalently imitate driven procession of rotator on which certain opposite point with the ultrasonic electric motor's stator be stirred friction materials, and can survey between the different friction materials instantaneous microcosmic condition mini, normal pressure and friction force in real time, then can gain the different friction materials on the instantaneous microcosmic condition the friction coefficient. It can study the ultrasonic electric motor intrinsic features on the different friction materials, such as the driven voltage and temperature exchange how the influence ultrasonic electric motor's instantaneous microcosmic condition fricative driven function.
Description
Technical field:
The present invention relates to a kind of ultrasonic friction pilot system.
Background technology:
Be ultimate principle and drive the ultrasound electric machine that power is provided by contact friction and have many characteristics that the traditional electrical magneto generator does not have, the application of succeeding with the inverse piezoelectric effect of piezoelectric crystal in fields such as aerospace, robot, automobile, precision positioning, medical machinery, micromachines.Wherein the stator surface particle of travelling wave supersonic motor is done elliptic motion, and surperficial particle continuous formed capable ripple, by surface row ripple friction-driven rotor motion.Contact between the stator and rotor of travelling wave supersonic motor is relative stable and continuous, and the motor output characteristics is more stable, is widely used with respect to other ultrasound electric machines, and more is useful for miniature and exact instrument, is convenient to accurate location.Because the development time of ultrasound electric machine is shorter, its correlation theory is imperfection also, and this has also fettered the application and the development of ultrasound electric machine greatly.Be engaged in the scholar of ultrasound electric machine research at present, only the Research on experimental methods ultrasonic vibration of attached supersonic vibration studies equivalently indirectly the correlation properties of ultrasonic friction driving to the influence of friction-driven at traditional friction wear testing machine or again outside.Do not carry out microcosmic instantaneous, directly ultrasonic friction driven study.Because the complicacy of friction phenomenon itself, in addition stator and rotor be in high frequency (tens KHz), a little (several microns) vibrate under the contact conditions, its friction-driven mechanism does not still have final conclusion; And the factor that influences the ultrasound electric machine output characteristics is a lot, as temperature, precompression, driving voltage and friction material inherent characteristic etc., so also do not set up accurate friction-driven model so far.
Summary of the invention:
The purpose of this invention is to provide a kind of ultrasonic little driving friction test system, it has the basic demand that can satisfy ultrasonic little driving friction test fully, and is simple to operate, the characteristics of stable performance.The present invention is made up of ultrasonic little driving frictional testing machine 40, charge amplifier 50, terminal board 60, microcomputer 70, ultrasonic little driving frictional testing machine 40 is connected with terminal board 60 with charge amplifier 50 by lead respectively, charge amplifier 50 is connected with terminal board 60 by lead, and terminal board 60 is connected with microcomputer 70 by lead.The present invention has the following advantages: (1) fully a certain particle of equivalent simulation travelling wave supersonic motor stator surface and standing-wave ultrasonic motor stator surface particle to posting the driving process of friction material rotor; (2) can join the real-time measurement that pair is carried out transient state microcosmic normal pressure, transient state Micro Lub driving force to differentiated friction material and friction, join secondary transient state Micro Lub coefficient thereby can draw differentiated friction material and friction; (3) can join the rising of the inherent characteristic of research ultrasound electric machine under the secondary situation such as precompression, driving voltage and temperature to ultrasound electric machine microcosmic transient state friction-driven Effect on Performance in differentiated friction material and friction; (4) exploitation can realize the software of high-frequency data collection and can carry out respective handling to the corresponding data that pilot system collects on the basis of existing hardware, so that carry out Tribological Analysis.The present invention provides feasible experiment condition for the foundation of friction-driven model between the microprocess of research ultrasound electric machine little driving, the ultrasound electric machine stator and rotor, the selection of ultrasound electric machine friction rotor material.
Description of drawings:
Fig. 1 is an one-piece construction synoptic diagram of the present invention, Fig. 2 is the one-piece construction synoptic diagram of the ultrasonic little driving frictional testing machine 40 of the present invention, Fig. 3 is that the A of Fig. 2 is to view, Fig. 4 is the vertical view of Fig. 2, Fig. 5 is the B-B cut-open view of Fig. 3, Fig. 6 is the structural representation of ultrasonic vibrator 10, Fig. 7 is the structural representation of embodiment two, Fig. 8 is the structural representation of embodiment three, Fig. 9 is the cut-open view of polarised direction vertical direction that produces the piezoelectric patches of vertical single order vibration, Figure 10 is the cut-open view of polarised direction vertical direction that produces the piezoelectric patches of crooked second order vibration, Figure 11 is the cut-open view of polarised direction vertical direction that produces the piezoelectric patches of vertical single order vibration, Figure 12 is the cut-open view of polarised direction vertical direction that produces the piezoelectric patches of crooked second order vibration, Figure 13 is the schematic diagram that the vibrating mass forward terminal produces elliptical vibration, and Figure 14 is ultrasonic little friction test system microcomputer operating platform surface chart.
Embodiment:
Embodiment one: (referring to Fig. 1-Fig. 6) present embodiment is made up of ultrasonic little driving frictional testing machine 40, charge amplifier 50, terminal board 60, microcomputer 70, ultrasonic little driving frictional testing machine 40 is connected with terminal board 60 with charge amplifier 50 by lead respectively, charge amplifier 50 is connected with terminal board 60 by lead, and terminal board 60 is connected with microcomputer 70 by lead.Ultrasonic little driving frictional testing machine 40 is by bearing 1, prop up socle 2, leveling nut 3, lower connecting plate 4, coupling bolt 5, sleeve 6, driving force output beam 7, transient behavior pressure sensor 8, sample tray 9, ultrasonic vibrator 10, gripper sleeve 11, counterweight fixed bar 12, load sleeve 13, upper junction plate 14, friction material layer 15, carrying cover 16, T shape transmission output shaft 17, bearing (ball) cover 18, pad 19, adjustable link 20, contact head 21, transient behavior drives dynamic pickup 22, sensor support base 23, connecting link 24, transverse bearing 25, axle sleeve 26, thrust bearing 27, nut 28, bolt 29 is formed; The bottom of propping up socle 2 is fixed on the upper surface of bearing 1, the top of socle 2 is fixed on by leveling nut 3 on four jiaos of lower connecting plate 4, sleeve 6 by coupling bolt 5 be fixed on lower connecting plate 4 above, the lower end of adjustable link 20 and connecting link 24 is separately fixed on the lower connecting plate 4 in sleeve 6 outsides, fixedly connected with upper junction plate 14 respectively in the upper end of adjustable link 20 and connecting link 24, be provided with pad 19 between adjustable link 20 and the upper junction plate 14, gripper sleeve 11 is fixed on the upper junction plate 14, counterweight fixed bar 12 is located at the upper end of load sleeve 13, load sleeve 13 is located in the gripper sleeve 11, the upper end of ultrasonic vibrator 10 is connected with the lower end of load sleeve 13, thrust bearing 27 is located at the downside in the sleeve 6, axle sleeve 26 is located at the upside of thrust bearing 27 in the sleeve 6, transverse bearing 25 is located in the axle sleeve 26, the middle part of T shape transmission output shaft 17 is connected with transverse bearing 25, the lower end of T shape transmission output shaft 17 is connected with thrust bearing 27, bearing (ball) cover 18 is located at the upside of transverse bearing 25 and by the upper end that is bolted to sleeve 6, sensor support base 23 is fixed on the side above the lower connecting plate 4, one side on sensor support base 23 tops is fixed with transient behavior driving force sensor 22, be fixed with contact head 21 on the transient behavior driving force sensor 22, be fixed with driving force output beam 7 on the contact head 21, one end of driving force output beam 7 is fixedlyed connected with the side plane 17-1 on the T shape transmission output shaft 17, transient behavior pressure sensor 8 is fixed on the side on plane on the T shape transmission output shaft 17, the upper end of transient behavior pressure sensor 8 is fixed with carrying cover 16, the upper end of carrying cover 16 is fixed with sample tray 9, sample tray 9 is provided with friction material layer 15, and friction material layer 15 is connected with ultrasonic vibrator 10 frictions.Be provided with bolt 29 between transient behavior driving force sensor 22, contact head 21, the driving force output beam 7, nut 28 is located on the termination of bolt 29 in driving force output beam 7 outsides.In order to transient behavior driving force sensor 22 is carried out pretension.Ultrasonic vibrator 10 is by friction-driven 31, preceding match block 32, vertical exciting piezoelectric patches 33, crooked exciting piezoelectric patches 34, ring flange 35, coupling bolt 36, back match block 37 is formed, the front end of match block 32 before friction-driven 31 is fixed on, be fixed with two bending tablet exciting piezoelectric patches 34 successively by coupling bolt 36 between preceding match block 32 and the back match block 37, two vertical exciting piezoelectric patches 33, ring flange 35, two vertical exciting piezoelectric patches 33 and two bending tablet exciting piezoelectric patches 34, vertically the lead 2 of exciting piezoelectric patches 33 is connected with terminal board 60 with lead W on the crooked exciting piezoelectric patches 34.This is a kind of bar-shaped ultrasonic vibrator.For bar-shaped ultrasonic vibrator, the vertical curved vibration of its high frequency all is with sandwich piezoelectric patches exciting, the piezoelectric patches of its extensional vibration and flexural vibrations and polarised direction thereof are respectively as Fig. 9, shown in Figure 10, vertical exciting piezoelectric patches 33 as shown in Figure 9 is pasted together along the annular piezoelectric patches of thickness direction polarization and the identical side of polarity by two to be formed, this group piezoelectric patches is that polarity is positive being pasted together as shown in the figure, if this polar orientation is entered as the sinusoidal wave voltage that changes (as Figure 13), piezoelectric patches elongation when the polarity of voltage direction is identical with the piezoelectric patches polar orientation, on the contrary then shrink.So just, motivate high frequency extensional vibration.Crooked as shown in figure 10 exciting piezoelectric patches 34 all is divided into polarised direction along horizontal diameter by two and forms along the annular piezoelectric patches of thickness direction polarization on the contrary and all, the mode that these two piezoelectric patches adopt the identical face of polarity to be pasted together and to draw same electrode is formed, on one side this group piezoelectric patches is that polarity is that polarity all is negative being pasted together for positive another side all as shown in the figure.If in the middle of two piezoelectric patches, be entered as the sinusoidal wave voltage that changes (as Figure 13), extend according to piezoelectric patches when the polarity of voltage direction is identical with the piezoelectric patches polar orientation, otherwise the principle of Shou Suoing then, in the positive half period of sine wave, should shorten on elongation the right, the group piezoelectric patches left side, promptly be equivalent on ultrasonic vibrator, add concentrated bending moment, ultrasonic vibrator is just done the high frequency flexural vibrations this moment, and the forward terminal of the friction-driven head of this ultrasonic vibrator is just done horizontal swing in high frequency.When adopting voltage-phase to differ 90 °, vertical exciting piezoelectric patches of this ultrasonic vibrator and crooked exciting piezoelectric patches 34 become the sinusoidal wave voltage (as Figure 13) that changes, drive simultaneously and promptly connect driving voltage at W, Z respectively, just the forward terminal of the friction-driven of this ultrasonic vibrator 31 is done high frequency elliptic motion (as Figure 13).
Embodiment two: ultrasonic vibrator 10 is with the difference of embodiment one in (referring to Fig. 7) present embodiment, ultrasonic vibrator 10 is by friction-driven 31, preceding match block 32, vertically exciting piezoelectric patches 33, crooked exciting piezoelectric patches 34, ring flange 35, coupling bolt 36, back match block 37 are formed, be fixed with two vertical exciting piezoelectric patches 33 successively by coupling bolt 36 between preceding match block 32 and the back match block 37, ring flange 35, two vertical exciting piezoelectric patches 33 are fixed with crooked exciting piezoelectric patches 34 in the both sides of friction-driven 31.Other composition is identical with embodiment one with annexation.This is a kind of excellent plate combined ultrasonic vibrating mass.For excellent plate combined ultrasonic vibrating mass, its longitudinal ultrasonic vibration also is with sandwich piezoelectric patches exciting, its vertical exciting piezoelectric patches 33 and polarised direction such as Figure 11, vertical exciting piezoelectric patches 33 compositions of excellent as can be known plate combined ultrasonic vibrating mass and polarised direction thereof form with the vertical exciting piezoelectric patches 33 of bar-shaped ultrasonic vibrator and polarised direction is identical, and the excitation principle of the two also is identical.The bending ultrasonic vibration of rod plate combined ultrasonic vibrating mass is to paste piezoelectric patches (as 34 among Fig. 7) by sheet metal to encourage.Crooked exciting piezoelectric patches 34 and polarised direction such as Figure 12, this piezoelectric patches polarizes along thickness direction, the crooked exciting piezoelectric patches 34 of this ultrasonic vibrator and bonding method such as Fig. 7 of sheet metal, and a slice is that the one side of positive polarity is pasted mutually with sheet metal, another sheet is that the one side of negative polarity is pasted mutually with sheet metal, and two positive and negative polarity that leak outside form power supply input utmost point W by wire coupling together.If two bending tablet exciting piezoelectric patches 34 are entered as the sinusoidal wave voltage (as Figure 13) that changes simultaneously, in the positive half period of voltage, positive polarity is crooked exciting piezoelectric patches 34 elongations of the input utmost point, sheet metal is to this lateral bending song, negative polarity is the then shortening of crooked exciting piezoelectric patches 34 of the input utmost point, sheet metal deviates from this lateral bending song, in the negative half-cycle of voltage, and the reverse be true.Ultrasonic vibrator is just done the high frequency flexural vibrations this moment, and the forward terminal of the friction-driven head of this ultrasonic vibrator is just done horizontal swing in high frequency.When adopting voltage-phases to differ 90 °, the vertical exciting piezoelectric patches 33 of this ultrasonic vibrator and crooked exciting piezoelectric patches 34 become sinusoidal wave variation voltage (as Figure 13) to drive promptly the driving voltage that the W in Fig. 7, Z respectively connect 90 ° of phase phasic differences simultaneously, just the forward terminal of the friction-driven of this ultrasonic vibrator 31 is done high frequency elliptic motion (as Figure 13).
Embodiment three: ultrasonic vibrator 10 is with the difference of embodiment one in (referring to Fig. 8) present embodiment, ultrasonic vibrator 10 is made of couple structure, each monomer is made up of friction-driven 31, preceding match block 32, eight vertical exciting piezoelectric patches 33, ring flange 35, coupling bolt 36, back match block 37, be fixed with four vertical exciting piezoelectric patches 33 respectively between ring flange 35 and preceding match block 32 and the back match block 37, two ring flange 35 fixing butt joints, two friction-driven 31 are 90 ° and are connected and fixed, and its outside, diagonal angle is rounded.Other composition is identical with embodiment one with annexation.This is a kind of two vertical composite ultraphonic vibrating mass.For two vertical composite ultraphonic vibrating masies (as Fig. 8), the vibration of its longitudinal ultrasonic and above-mentioned two kinds of ultrasonic vibrations the same, also be with sandwich piezoelectric patches exciting, its vertical exciting piezoelectric patches 33 and polarised direction such as Figure 11, two as can be known vertical exciting piezoelectric patches 33 compositions of vertical composite ultraphonic vibrating mass and polarised direction thereof form with the vertical exciting piezoelectric patches 33 of preceding two kinds of ultrasonic vibrators and polarised direction is identical, and the excitation principle of the two (as Figure 13) also is identical.
Ultrasonic little driving friction test system signal transmission route is: transient behavior force transducer outgoing signal is through charge amplifier, import the high-frequency data capture card into through terminal board again, and data collecting card inserts the ISA interface slot of microcomputer, and system data just imports microcomputer in order to handling like this.This system is with dma mode transmission signals and image data, can realize the requirement that high-frequency data is gathered, thereby can satisfy the instantaneous high frequency of ultrasonic little driving friction test system is gathered requirement.Ultrasonic little driving friction test operating platform interface (as Figure 14), this interface is based on Visual C++ and by the dynamic link libraries (DLL) of high-frequency data capture card and exploitation, by this interface can be to the state variable such as the device number of pilot system, gather initial channel number, stop channel number, gather number, frequency acquisition carries out predefine, also can handle (as drawing etc.) to gathering the data of coming, and can preserve so that handle from now on.
Claims (6)
1, ultrasonic little driving friction test system, it is made up of ultrasonic little driving frictional testing machine (40), charge amplifier (50), terminal board (60), microcomputer (70), it is characterized in that ultrasonic little driving frictional testing machine (40) is connected with terminal board (60) with charge amplifier (50) by lead respectively, charge amplifier (50) is connected with terminal board (60) by lead, and terminal board (60) is connected with microcomputer (70) by lead.
2, ultrasonic little driving friction test according to claim 1 system is characterized in that ultrasonic little driving frictional testing machine (40) is by bearing (1), prop up socle (2), leveling nut (3), lower connecting plate (4), coupling bolt (5), sleeve (6), driving force output beam (7), transient behavior pressure sensor (8), sample tray (9), ultrasonic vibrator (10), gripper sleeve (11), counterweight fixed bar (12), load sleeve (13), upper junction plate (14), friction material layer (15), carrying cover (16), T shape transmission output shaft (17), bearing (ball) cover (18), pad (19), adjustable link (20), contact head (21), transient behavior drives dynamic pickup (22), sensor support base (23), connecting link (24), transverse bearing (25), axle sleeve (26), thrust bearing (27), nut (28), bolt (29) is formed; The bottom of propping up socle (2) is fixed on the upper surface of bearing (1), the top of socle (2) is fixed on by leveling nut (3) on four jiaos of lower connecting plate (4), sleeve (6) by coupling bolt (5) be fixed on lower connecting plate (4) above, the lower end of adjustable link (20) and connecting link (24) is separately fixed on the lower connecting plate (4) in sleeve (6) outside, fixedly connected with upper junction plate (14) respectively in the upper end of adjustable link (20) and connecting link (24), be provided with pad (19) between adjustable link (20) and the upper junction plate (14), gripper sleeve (11) is fixed on the upper junction plate (14), counterweight fixed bar (12) is located at the upper end of load sleeve (13), load sleeve (13) is located in the gripper sleeve (11), ultrasonic vibrator (10) is connected with the lower end of load sleeve (13), thrust bearing (27) is located at the downside in the sleeve (6), axle sleeve (26) is located at the upside of the interior thrust bearing of sleeve (6) (27), transverse bearing (25) is located in the axle sleeve (26), the middle part of T shape transmission output shaft (17) is connected with transverse bearing (25), the lower end of T shape transmission output shaft (17) is connected with thrust bearing (27), bearing (ball) cover (18) is located at the upside of transverse bearing (25) and by the upper end that is bolted to sleeve (6), sensor support base (23) is fixed on the side above the lower connecting plate (4), one side on sensor support base (23) top is fixed with transient behavior driving force sensor (22), be fixed with contact head (21) on the transient behavior driving force sensor (22), be fixed with driving force output beam (7) on the contact head (21), one end of driving force output beam (7) is fixedlyed connected with the side plane (17-1) on the T shape transmission output shaft (17), transient behavior pressure sensor (8) is fixed on T shape transmission output shaft (17) and goes up on the side on plane, the upper end of transient behavior pressure sensor (8) is fixed with carrying cover (16), the upper end of carrying cover (16) is fixed with sample tray (9), sample tray (9) is provided with friction material layer (15), and friction material layer (15) is connected with ultrasonic vibrator (10) friction.
3, ultrasonic little driving friction test according to claim 2 system, it is characterized in that ultrasonic vibrator (10) is by friction-driven head (31), preceding match block (32), vertical exciting piezoelectric patches (33), crooked exciting piezoelectric patches (34), ring flange (35), coupling bolt (36), back match block (37) is formed, friction-driven head (31) is fixed on the front end of preceding match block (32), be fixed with two bending tablet exciting piezoelectric patches (34) successively by coupling bolt (36) between preceding match block (32) and the back match block (37), two vertical exciting piezoelectric patches (33), ring flange (35), two vertical exciting piezoelectric patches (33) and two bending tablet exciting piezoelectric patches (34), the lead (2) of vertical exciting piezoelectric patches (33) is connected with terminal board (60) with the lead W on the crooked exciting piezoelectric patches (34).
4, ultrasonic little driving friction test according to claim 2 system, it is characterized in that ultrasonic vibrator (10) is by friction-driven head (31), preceding match block (32), vertical exciting piezoelectric patches (33), crooked exciting piezoelectric patches (34), ring flange (35), coupling bolt (36), back match block (37) is formed, be fixed with two vertical exciting piezoelectric patches (33) successively by coupling bolt (36) between preceding match block (32) and the back match block (37), ring flange (35), two vertical exciting piezoelectric patches (33) are fixed with crooked exciting piezoelectric patches (34) in the both sides of friction-driven head (31).
5, ultrasonic little driving friction test according to claim 2 system, it is characterized in that ultrasonic vibrator (10) is made of couple structure, each monomer is by friction-driven head (31), preceding match block (32), eight vertical exciting piezoelectric patches (33), ring flange (35), coupling bolt (36), back match block (37) is formed, be fixed with four vertical exciting piezoelectric patches (33) respectively between ring flange (35) and preceding match block (32) and the back match block (37), the fixing butt joint of two ring flanges (35), two friction-driven heads (31) are 90 ° and are connected and fixed, and its outside, diagonal angle is rounded.
6, ultrasonic little driving friction test according to claim 2 system, it is characterized in that being provided with bolt (29) between transient behavior driving force sensor (22), contact head (21), the driving force output beam (7), nut (28) is located on the termination of the bolt (29) outside the driving force output beam (7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200410013767 CN1265186C (en) | 2004-05-21 | 2004-05-21 | Ultrasonic micro driving friction test system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200410013767 CN1265186C (en) | 2004-05-21 | 2004-05-21 | Ultrasonic micro driving friction test system |
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| CN1580737A true CN1580737A (en) | 2005-02-16 |
| CN1265186C CN1265186C (en) | 2006-07-19 |
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| CN 200410013767 Expired - Fee Related CN1265186C (en) | 2004-05-21 | 2004-05-21 | Ultrasonic micro driving friction test system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100335907C (en) * | 2005-03-23 | 2007-09-05 | 华南理工大学 | Multiple factor combination effect analog experiment apparatus for static electricity dynamic potentials |
| CN103245843A (en) * | 2013-04-26 | 2013-08-14 | 福建工程学院 | Device and method for detecting piezoelectric property of ultrasonic motor stator and piezoelectric ceramic compound |
| CN103278411A (en) * | 2013-05-14 | 2013-09-04 | 吉林大学 | Spherical contact type friction characteristic testing device under ultrasonic vibration |
| CN104458091A (en) * | 2014-12-03 | 2015-03-25 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Device and method for measuring packaging pretightening force of piezoelectric crystal actuator |
| CN105300823A (en) * | 2015-10-14 | 2016-02-03 | 青岛理工大学 | Small-load impact wear testing machine with tangential speed |
| CN105403470A (en) * | 2015-12-11 | 2016-03-16 | 福建工程学院 | Apparatus and method for testing bending strength of bamboo chip by using ultrasonic motor |
| CN105509812A (en) * | 2016-01-08 | 2016-04-20 | 苏州市职业大学 | Ultrasonic motor performance testing device |
| CN109031123A (en) * | 2018-09-18 | 2018-12-18 | 江苏大学 | A kind of linear type small and special electric machine performance automatic test system |
-
2004
- 2004-05-21 CN CN 200410013767 patent/CN1265186C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100335907C (en) * | 2005-03-23 | 2007-09-05 | 华南理工大学 | Multiple factor combination effect analog experiment apparatus for static electricity dynamic potentials |
| CN103245843A (en) * | 2013-04-26 | 2013-08-14 | 福建工程学院 | Device and method for detecting piezoelectric property of ultrasonic motor stator and piezoelectric ceramic compound |
| CN103245843B (en) * | 2013-04-26 | 2015-06-03 | 福建工程学院 | Device and method for detecting piezoelectric property of ultrasonic motor stator and piezoelectric ceramic compound |
| CN103278411A (en) * | 2013-05-14 | 2013-09-04 | 吉林大学 | Spherical contact type friction characteristic testing device under ultrasonic vibration |
| CN103278411B (en) * | 2013-05-14 | 2016-04-13 | 吉林大学 | Ultrasonic vibration lower peripheral surface contact-type frictional characteristic test device |
| CN104458091A (en) * | 2014-12-03 | 2015-03-25 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Device and method for measuring packaging pretightening force of piezoelectric crystal actuator |
| CN105300823A (en) * | 2015-10-14 | 2016-02-03 | 青岛理工大学 | Small-load impact wear testing machine with tangential speed |
| CN105403470A (en) * | 2015-12-11 | 2016-03-16 | 福建工程学院 | Apparatus and method for testing bending strength of bamboo chip by using ultrasonic motor |
| CN105403470B (en) * | 2015-12-11 | 2018-07-10 | 福建工程学院 | A kind of device and method of ultrasound electric machine test bamboo chip bending strength |
| CN105509812A (en) * | 2016-01-08 | 2016-04-20 | 苏州市职业大学 | Ultrasonic motor performance testing device |
| CN109031123A (en) * | 2018-09-18 | 2018-12-18 | 江苏大学 | A kind of linear type small and special electric machine performance automatic test system |
| CN109031123B (en) * | 2018-09-18 | 2020-08-28 | 江苏大学 | Automatic linear type micro-special motor performance testing system |
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