CN1122903A - Monitoring apparatus - Google Patents
Monitoring apparatus Download PDFInfo
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- CN1122903A CN1122903A CN 94113893 CN94113893A CN1122903A CN 1122903 A CN1122903 A CN 1122903A CN 94113893 CN94113893 CN 94113893 CN 94113893 A CN94113893 A CN 94113893A CN 1122903 A CN1122903 A CN 1122903A
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Abstract
An equipment for monitoring the immediately will-be-failure of static and dynamic part or member in monolithic respect. The said equipment includes sealed cavity sealed with stable vacuum source on or in the part or member, the connecting part including a high-impedance fluid flowrate device between the cavity and source, and the device for monitoring the pressure variation between the cavity and source.
Description
The present invention relates to a kind of equipment that can be convenient to the structural intergrity of continuous monitoring parts or member, so that the early stage demonstration that is about to destruction of member to be provided.The present invention both had been used for the static force member, also was used for dynamic component.
When the structural intergrity of monitoring component, very big difficulty is operating parts need be unloaded, so that check the integrality of these parts.
In the past, comprise the motion process of dye liquor between the monitoring component surface or liquid with the big portion method of the structural intergrity of fluid inspection and test component always.When the work of member or parts and/or be positioned at and be not easy to approachingly when regional, this method is not easy to use continuously.Therefore, this method inconvenience is to the continuous data recording or the telemonitoring of parts or member.
Other method comprises as U.S. patent documents 3,820, the method for 381 described use negative-pressure gas or vacuum, the method for the cannulated fasteners that telemonitoring of this patent document narration is made by the high osmosis material.But this method is not suitable for the material with high osmosis, is unpractical to general member therefore.
In addition, in U.S. patent documents US4,104,906; 4,135,386; With 4,145, announced the space of finding time the method for using on 915 with the monitoring member integrity.Described method utilizes the vacuum monitoring to have the zone of high and low infiltrative member, but is not to use same device to monitor.In addition, the device of this announcement is not suitable in external condition and can constantly changes the air pressure change of sea level elevation (for example with) and need know and when maybe will occur destroying and not only point out to destroy continuous monitoring under the situation about whether having taken place.
The purpose of this invention is to provide a kind of device, this device is owing to overcome some problems of aforesaid prior art systems at least in part, and the continuous monitoring to member is more prone to, imminent destruction is proposed this phase warning early.
The invention provides a kind of equipment, this equipment can be regulated, and adapts with the intrinsic perviousness loss with the material of employed material of equipment of the present invention and monitored equipment, and therefore, test is not subjected to the influence such as change of external conditions such as pressure, temperature.
Other application of the present invention can comprise by the development degree of monitoring member and tamper indicating with designed maximum acceptable destruction extended limit monitors existing destruction.
Version of the present invention belong to a kind of like this be used for monitoring static or dynamically use in parts or member integrity be about to take place the equipment that destroys, be included on parts or the member or an annular seal space in it, basically a stable vacuum source, comprise high impedance fluid flow device and the connecting portion between described source, this connecting portion and be used to monitor the device that pressure between described chamber and the source changes.
The preferred characteristics according to the present invention, stable basically vacuum source comprise a vacuum tank that links to each other with vacuum pump.
The vacuum tightness that the present invention can adopt can change to being referred to as in " low " vacuum range from negative pressure, and this vacuum tightness adopts conventional single-stage vacuum pump to reach.Use numeral, vacuum tightness can be usually in the scope of 700 torr to 50 torrs.Major requirement to vacuum source is that it needs basicly stable vacuum tightness can be provided.The size of vacuum tightness can influence the sensitivity of monitoring device, but for subatmospheric vacuum tightness, the improvement of sensitivity is not remarkable.
The preferred characteristics according to the present invention, the chamber of a plurality of sealings links to each other with stable basically vacuum source.
The preferred characteristics according to the present invention, described chamber comprise and being arranged on described parts or the member or the fan in the chamber in it holds the formula packoff.
According to another preferred characteristics of the present invention, described chamber is configured as the element that a material that constitutes the depression in chamber forms by one deck and constitutes by adopting, described member is suitable for being attached to described parts or/and component surface, thereby this element defines the chamber between this element and parts and/or member.
According to another preferred characteristics of the present invention, a plurality of chambeies are arranged on parts and/or the structure, and each chamber or chamber group link to each other with the source by an independent connecting portion that contains the high impedance fluid flow arrangements.
According to another preferred characteristics of the present invention, second group of chamber is arranged on parts or the member or in it, and described chamber or second group of chamber follow the external world of member parts to communicate.
According to a preferred feature of These characteristics, each chamber and second chamber are very near from getting.
Characteristics of the present invention are, said system is dynamic, thus during whole monitoring, the vacuum source kept stable, and at whole test period, this system can flow feeding chamber with known gas.In addition, chamber and with the volume of the connecting portion of high impedance fluid flow device and vacuum source and compare very little with the volume of the connecting portion of high impedance fluid flow device.
According to following explanation to several embodiments of the present invention, the present invention will be more fully understood.Be illustrated with reference to the accompanying drawings:
Fig. 1 a is a first embodiment of the present invention synoptic diagram;
Fig. 1 b is the part cross section sketch that comprises first example structure;
Fig. 2 is a diagrammatic cross-sectional view of having used the member of second embodiment;
Fig. 3 is a diagrammatic cross-sectional view of having used the member of the 3rd embodiment;
Fig. 4 is a shaft side figure of having used the member of the 4th, the 5th and the 6th embodiment;
Fig. 5 represents that the hinge that first and second embodiment are applied between two members connects;
Fig. 6 is a phantom view that includes the easy molten rigging pilotage of aircraft engine of the seventh embodiment of the present invention;
Fig. 7 is a shaft side figure that contains the properller of the eighth embodiment of the present invention; And Fig. 8 is the part diagrammatic cross-sectional view of properller mount pad shown in Figure 7.
Each embodiment of the present invention that will illustrate below and illustrated in the accompanying drawings is that structural intergrity with monitoring component or member is a target.
First embodiment shown in Figure 1 relates to a kind of be used for the monitoring member that wherein forms a plurality of chambeies 11 or the device of parts, the chamber by or around wanting the monitored parts or the zone of member to extend, and each chamber has size capillaceous.Each chamber links to each other with first conduit 13 by arm 12, and first conduit 13 links to each other with an end of high impedance fluid flow device 15 then, and the other end of high impedance fluid flow device 15 links to each other with stable vacuum source 17 by second conduit 16.
Stable vacuum source comprises a jar (not shown), the volume summation of the volume of this jar 11, first conduit 13 and arm 12 much larger than the chamber, and link to each other with the single-stage vacuum pump (not shown) of a routine, this vacuum pump is to be used for making the vacuum in the jar to keep stable substantially.According to the requirement of monitoring of environmental,, vacuum pump just can realize making the vacuum in the jar to keep stable purpose by being worked constantly or periodically.The grade that will remain on the vacuum in the jar usually is called " low " vacuum.
Differential pressure pickup 18 is connected across the two ends of high impedance fluid flow device 15 by linking to each other with 20 with the conduit 19 that is connected respectively between first conduit 13 and second conduit 16, this sensor links to each other with an electrical output signal, so that a kind of electric pulse to be provided, this pulse is sent on the monitor 22 by lead 21, and this monitor is arranged on the position that is easy to read.Monitor 22 provides an output that shows reversible pressure reduction, and this pressure reduction is by the sensor determination between chamber 11 and the stable vacuum source 17 owing to occur between high impedance fluid flow device 15 two ends that significant pressure falls.
Under the situation of the dynamic environment that first embodiment is used in acting force, high impedance fluid flow device and sensor can be installed on the unit under test.Like this, second conduit 16 need be equipped with rotary sealing appts 50 or other similarly device adapt to this motion.In addition, lead 21 can adapt to relative motion between sensor 18 and the monitor 22 by for example collector ring and the such dynamic linker 65 of brushgear.The example of this design will connect discussion with Fig. 7 and the 8th embodiment shown in Figure 8.
The existence of high impedance fluid flow device 15 makes and keep equal substantially vacuum condition in normal working conditions between chamber and larger-diameter the 2nd conduit 16 between chamber 11 and the vacuum source 17.This is because high impedance fluid flow device fluid flow has a kind of impedance, this impedance can be regulated known gas diffusion that flows into described chamber or the fluid flow of estimating for the material of making described parts and arm 12, first conduit 13 and connecting portion therebetween.Under the situation that the leakage in the one or more chamber 11 of bleeding increases, this variation will cause the change of vacuum condition in first conduit 13, this kind change can not be by high impedance fluid flow device 15 accent that saves, and sensor 18 will detect the synthetic pressure reduction between conduit 13 and 16 like this.
The monitoring and this parts or the residing ambient pressure conditional independence of member that provide by first embodiment.The standard of passing judgment on the chamber is included in second conduit 16 and stable vacuum source 17 pressure inside conditions.If desired, vacuum technique adopts suitable compound substance in high impedance fluid flow device 15 structures routinely, makes this equipment irrelevant with temperature variation basically.
Should be understood that chamber 11 can take the contour shape of the monitored member characteristic of any adaptation, and can with this member on be in diverse location a plurality of different parts link.
An instantiation according to first embodiment, described chamber has size capillaceous, the diameter of first conduit is 0.5 to 1.0 millimeter, the diameter of the 2nd conduit is 2.0 to 3.0 millimeters, and the high impedance fluid flow device comprises that a diameter is 0.01 to 0.5 millimeter a conduit, and its length is then by the needed device sensitivity decision of device.One type high impedance fluid flow device comprise a quilt around axle or class with the long capillary on the object.This length capillaceous and diameter are determined the sensitivity of device, and in fact, this length according to general estimate can be from the chamber 11, the expection leakage rate that takes place of arm 12, first conduit 13 and junction therebetween is selected, is suitable for the leakage rate of this expection so that make from the flow through fluid flow of high impedance conduit 15 of vacuum source.As a result, lead first and to differ between 13 and second conduit 16, just can not fall owing to the significant pressure that this leakage produces.
The concrete feature of this system is its self-checking capability when starting, and does not need special program to check this system.In order to reach maximum sensitivity, can put independent by-pass line (not shown) of cross-over connection on the device 15 at the high impedance fluid stream that will be communicated with first and second conduits 13 and 16 respectively, when equipment begins to vacuumize, to overcome the hysteresis of pressure transducer 8.
For with apparatus settings in maximum sensitivity, before the setting of adjusting differential pressure pickup 8, perhaps need to have sufficient time to finish the solvent in any bonding agent used in being connected of the described chamber arm and first conduit degasification to eliminate false readings.
If desired, shown in Fig. 1 b, chamber 11a can divide into groups, and can link by same or a plurality of second chamber 11b that communicate with external condition.This structure can be in becoming as seen on the surface of defective at member or monitoring the defective that forms in the structure before obviously on the contrary.
Second embodiment shown in Figure 2 uses an element 130, and this element is fitted in the surface of parts 110, and to form chamber 111, wherein the part of the wall of parts 110 forms chamber 111.Element 130 is formed by the material thin-layer of band depression on one side.Form the enough rigidity of the material require of element 130 keeping the profile of depression, and the pressure reduction between inside and outside of in use standing to cave in.In addition, the material require of the part 130 of formation has enough ductility, so that can make depression with this material easily.Material can comprise the synthetic material of metal, plastics or elastic body or equivalence.
Under the situation of second embodiment, this element is made into band, but if desired, this member can be made into attachment strap or analog.
Under the situation of second embodiment shown in Figure 2, the such a pair of band of picture dot spare 130a and 130b is fitted on the member 110.Estimate the zone that defective 135 occurs.Element 130a is attached to the component surface with this member marginating compartment, and another element 130b is positioned at this member edge, and its shape is made round the edge and extended.Element 130a and 130b link to each other with stablizing vacuum source respectively by having with the high impedance fluid flow device (not shown) of the described same form of first embodiment of Fig. 1.
When defective 135 development extends to fluid and can infiltrate the degree in any one chamber 111, between chamber and vacuum source, just produce pressure reduction, thereby trigger pressure transducer.The sensitivity of present embodiment can be very high, so that the size of defective may not be macroscopic, and defective can comprise the destruction of the crystal structure of the material of making this member.
When forming element 13a and 13b, material strips can make it have elongated slot or depression at element surface, to be attached on the described member with any suitable forming technique processing.In addition, scribbling bonding agent and/or suitable sealant on the bottom so that this element can seal is bonded on the described member.In addition, scribbling bonding agent and/or suitable sealant on the bottom so that this element can seal is bonded on the described member.
A kind of form that is applicable to the element of second embodiment comprises makes a kind of plastic tape element, and the one side of plastic tape scribbles bonding agent, is covered by the protective seam that can remove.Before the use, plastic tape is shaped on groove.Then, this band is cut into the length that needs, fits to occasion on the described member, remove protective seam at this band.One end of band is surrounded by suitable Connection Element, so that band can be connected to by the high impedance conduit and stablize on the vacuum source, the other end then terminal by groove or employing fluid sealant or an extremity piece seals.
The 3rd embodiment shown in Figure 3 is the modification of second embodiment, and it uses element 230, and this element is attached to the surface of member 210, to form a plurality of chambeies 211 from the teeth outwards.Under the situation of the 3rd embodiment, except a plurality of parallel depression or grooves of separating form along the leement duration direction, form together outside a plurality of parallel chambeies 111 with the isostructure surface, element 230 is taked the form identical with the element 130 of second embodiment.Element 230 to be to be attached on the member with the same mode of the element 130 of second embodiment, as shown in Figure 3, can be attached on the surface and edge of member 210.Under the situation of the 3rd embodiment, the same with the situation of second embodiment, each chamber 211 can link to each other with stable vacuum source.Another kind of alternative method is, exocoel can be connected with stable vacuum source by the high resistant fluid flow device with central chamber 211a, and center lumen 211b can lead to the external world.This layout provides monitoring to the distortion or the damage of surface breakdown 235 or surface coating, is forseeable near the parts surface that above-mentioned damage is for example made by high alloy material when parts bear pulsating stress.
Four, the 5th and the 6th embodiment is illustrated among Fig. 4, and each embodiment relates to the device of a kind of monitoring in two parts 310a that are fixed together by rivet 310C and the riveted joint between the 310b.
Under the situation of the 4th embodiment, be attached on the face of riveted joint portion with the element 230 identic elements 330 of the 3rd embodiment.Element 330 is shaped on the center pit of one group of axially spaced-apart, make the head of rivet 310C can pass this hole, by the surperficial formed chamber 311 of an element and a parts 310a then such as among first embodiment discussion crosses, be connected with stable vacuum source with first conduit 313 by the high impedance fluid flow device.
Under the situation of the 5th embodiment, special ring piece 430 be used in each rivet 310c around.The profile of each shape piece is a ring-type, so that it can be installed around rivet 310C, each piece also is shaped on radially extension 431, and this one can engage with adjacent ring piece (if existence).Each the ring piece all be shaped on a ring-shaped depression (not shown), it with a pair of on diametric(al) opposed radial depressions (not shown) be communicated with.When being in the appropriate location, the radial depressions of adjacent ring piece will be aligned with each other.Between by each ring chamber that piece was limited, to be interconnected.The outermost layer of ring piece is suitable for making the first conduit 4B to connect with the formed chamber of being encircled in piece of depression by each.
Under the situation of the 6th embodiment, liner 530 is configured between the first parts 310a, the second parts 310b.This liner is shaped on concavity or passage, and to form chamber 311, extend around each rivet 310 in this chamber, and also extend between several rivets.These depressions or passage lead to each face of parts 310a and 31b.These can be realized by multihole device.
Fig. 5 illustrates first and second embodiment and is applied in the practical application that comprises with a trunnion 650 hinged device between two parts 610 and 640.The outside surface of each parts all posts the net with element 230 components identical 630 of second embodiment.In addition, trunnion 650 is shaped on the axial center hole (not shown) that is equivalent to capillary dimensions, and this hole limits a chamber in pivot.In addition, each end of trunnion all has the ring-type element 630b of same form to link with the element 230 with second embodiment, and is fixed on the hinged parts 610 that surround trunnion 650.Each element 630a, 630b are connected with stable vacuum source through the high impedance fluid flow device by means of first conduit 613 with trunnion 650 interior chambeies.
The 7th embodiment shown in Figure 6 relates to the device that is used to monitor such as the structural intergrity of the such hollow-core construction element of the easy molten rigging pilotage of aircraft engine 710.As shown in Figure 6, pin 710 is essentially tubulose, does not have end block 740, to seal each end.This embodiment comprises the O-ring seal that uses to be made by plastics or elastic body or materials similar, or similar elements 730, the sealing circle is shaped on groove at its outside surface, and its outside surface can engage hermetically with the inside surface of pin, so that form chamber 711 between them.The chamber 711 of Xing Chenging is connected in high impedance pipeline and stable vacuum source by first conduit 713 then like this, so that monitored as discussing among the embodiment formerly.As discussing in the 3rd embodiment, chamber 711 can link with second chamber that separates, and extend jointly in this second chamber and chamber 711, and lead to the external world.
In addition, if desired, the direction in the chamber and second chamber can be positioned to be parallel to the central axis of pin, so that can detect the destruction in the shear plane vertical with central axis.
Fig. 8 of Fig. 7 illustrates the application with relevant above-mentioned first embodiment of monitoring properller member.Fig. 8 illustrates the inside of boss, oar shell that comprises this embodiment properller and the blade of cutting open.Second conduit 816 is installed on the static hood 853, and connects by the rotary sealing appts 850 that is arranged on the propeller shaft 851, and forms module 852 fluids interior with being contained in properller axle sleeve 810 and be communicated with.Module 852 is equipped with high impedance fluid flow device and pressure transducer.The screw propeller wheel hub also is equipped with minor diameter first conduit 813 that links to each other with chamber 811, and this conduit is got the kapillary form, passes propeller blade.If desired, available mat is revised electric deicing cover, is had in the hyperchannel chamber (not shown) of form described in the 3rd embodiment and the surface channel that forms replaces kapillary conduit 811 to provide.
Fig. 8 shows a typical rotary rotary sealing appts 850, and the sealing device makes the 2nd conduit 816 connect with the vacuum between the assembly 852 and is more prone to.Rotary sealing appts is formed by first sleeve 860, and this sleeve is by being bolted on the static engine outer cover 853.First sleeve and propeller shaft 851 concentrics.First sleeve 860 can coaxial heart be installed on second sleeve 861, and the 2nd sleeve is installed on the rotating screw axle 851, and second sleeve 861 is fixed with the screw propeller axle sleeve.The face that first sleeve is relative with the 2nd sleeve is shaped on relative groove, thereby forms a ring pipe 863.On the face relative, be provided with the suitable seal device with conduit 863 each side.The 2nd conduit 816 passes to ring pipe 863 through first sleeve 860, and module 852 is connected to ring pipe 863 through second sleeve 861.Electrical connection through sensor forms by means of the rotation collector ring 866 that is arranged on second sleeve, 861 outsides with by first sleeve 860 brush 865 that supported and that also be provided with suitable lead 867.
A kind of alternative plan as collector ring and brush assembly of electric, sensor can link with transmitter, and monitor can connect with receiver, thereby when sensor produces one when being illustrated in high impedance fluid flow device two ends and having the signal of pressure reduction, just make transmitter to signal of telltale emission, telltale will start monitor.
In addition, for each embodiment, a plurality of monitored chambeies are on certain parts or the member or the situation of the diverse location in it, first conduit or the arm conduit in each or every group of chamber may be closed by a simple holding action or any other suitable device, so that detecting under the situation of defective, make and suspect it is the position isolation of defective.
For torture test general in the laboratory, the present invention can be used for being subjected in the experimental facilities in controlling/monitoring defective or crack, and experimental provision is stopped in the distress phase that is occurred defective or crack by the test object.In the torture test of high alloy material, can cause the evolution of the trickle surface crack of destruction rapidly can adopt the small components matrix that is attachment strap or sucker form to come the remote control detection and tracking, described cover plate and sucker and sensor separately link.
In each embodiment, the tank volume of vacuum source much larger than the chamber, the summation of arm and catheter volume.
Application example of the present invention comprises the monitoring such as airframe, undercarriage, control aerofoil, linkage, screw propeller, lifting airscrew device and similar member.
Should be understood that scope of the present invention need not be confined in the particular range of the foregoing description.
Claims (15)
- One kind be used for monitoring static or dynamically use in parts or member integrity be about to the equipment that takes place to destroy, be included on parts or the member or an annular seal space in it, basically a stable vacuum source, connecting portion between described chamber and described source, this connecting portion comprise the high impedance fluid flow device and monitor the device that pressure changes between described chamber and the source.
- 2. equipment according to claim 1 is characterized in that, stable basically vacuum source comprises a vacuum tank that links to each other with vacuum pump.
- 3. equipment according to claim 1 and 2 is characterized in that, the chamber of a plurality of sealings links to each other with connecting portion.
- 4. according to claim 1,2 or 3 described equipment, it is characterized in that described chamber comprises that one is arranged on described parts or the member or the labyrinth-type excluder in the chamber in it.
- 5. according to the described equipment of aforementioned any one claim, it is characterized in that, described chamber is configured as the element that a material that constitutes the depression in chamber forms by one deck and constitutes by adopting, described member is suitable for being attached to described parts or/and component surface, thereby this element defines the chamber between this element and parts or member.
- 6. according to the described equipment of aforementioned any one claim, it is characterized in that a plurality of chambeies are arranged on parts and/or the member, each chamber or chamber group link to each other with the source by independent connecting portion.
- 7. according to the described equipment of aforementioned any one claim, it is characterized in that second group of chamber is arranged on parts or the member or in it, described chamber or second group of chamber follow the external world of member or parts to communicate.
- 8. equipment according to claim 7 is characterized in that, each chamber and second chamber are very near from getting.
- 9. according to the described equipment of aforementioned any one claim, it is characterized in that the volume in described chamber or described each chamber is much smaller than the volume in described source.
- 10. according to the described equipment of aforementioned any one claim, it is characterized in that described parts or member can be made shuttling movement with respect to a fixed component, wherein said source is arranged on the fixed component.
- 11. equipment according to claim 10 is characterized in that, the high impedance fluid flow device is installed on described parts or the member.
- 12. being connected to each other by a rotary sealing appts between described source and chamber realizes.
- 13. equipment according to claim 11 is characterized in that, the device that monitoring pressure changes comprises a sensor that links to each other with each end of high impedance fluid flow device, and this sensor is contained on described parts or the member; And a telltale that is installed on the described fixed component, be adapted to motion between described parts or member and fixed sturcture in the connection between sensor and the telltale.
- 14. equipment according to claim 13 is characterized in that, the connecting portion between sensor and telltale comprises a transmitter that links to each other with sensor and the receiver that links to each other with telltale.
- 15. as general description a kind of globality of being used to monitor static and dynamic component or member is about to take place the equipment of destruction in this article.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94113893 CN1054916C (en) | 1994-11-05 | 1994-11-05 | Monitoring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94113893 CN1054916C (en) | 1994-11-05 | 1994-11-05 | Monitoring apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1122903A true CN1122903A (en) | 1996-05-22 |
| CN1054916C CN1054916C (en) | 2000-07-26 |
Family
ID=5036865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94113893 Expired - Lifetime CN1054916C (en) | 1994-11-05 | 1994-11-05 | Monitoring apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1054916C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1318829C (en) * | 2000-09-08 | 2007-05-30 | 结构监测***有限公司 | Method and apparatus for monitoring the integrity of components and structures |
| CN1997881B (en) * | 2005-01-10 | 2010-09-22 | 膜康公司 | Instrument and method for detecting leaks in hermetically sealed packaging |
| CN101243312B (en) * | 2005-08-18 | 2012-12-19 | 布鲁克机械公司 | System and method for electronic diagnostics of a process vacuum environment |
| CN101918806B (en) * | 2007-11-21 | 2013-06-12 | 结构监测***有限公司 | Differential comparative pressure monitoring system |
| CN107685552A (en) * | 2016-08-04 | 2018-02-13 | 大数据奥尼尔公司 | System and method for actively printing continuity control and injury protection |
| CN108760187A (en) * | 2018-06-29 | 2018-11-06 | 江苏金风科技有限公司 | Blade crack state monitoring method, monitoring system and blade |
| CN109854460A (en) * | 2019-03-28 | 2019-06-07 | 米建军 | Fan blade detection method and device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1565475B (en) * | 2003-04-25 | 2010-09-01 | 翁定高 | Product for prevention and treatment for virus infection of respiratory tract |
| CA2910062A1 (en) | 2013-05-06 | 2014-11-13 | Vrije Universiteit Brussel | Effective structural health monitoring |
-
1994
- 1994-11-05 CN CN 94113893 patent/CN1054916C/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1318829C (en) * | 2000-09-08 | 2007-05-30 | 结构监测***有限公司 | Method and apparatus for monitoring the integrity of components and structures |
| CN1997881B (en) * | 2005-01-10 | 2010-09-22 | 膜康公司 | Instrument and method for detecting leaks in hermetically sealed packaging |
| CN101243312B (en) * | 2005-08-18 | 2012-12-19 | 布鲁克机械公司 | System and method for electronic diagnostics of a process vacuum environment |
| CN101918806B (en) * | 2007-11-21 | 2013-06-12 | 结构监测***有限公司 | Differential comparative pressure monitoring system |
| CN107685552A (en) * | 2016-08-04 | 2018-02-13 | 大数据奥尼尔公司 | System and method for actively printing continuity control and injury protection |
| CN107685552B (en) * | 2016-08-04 | 2021-04-20 | 大数据奥尼尔公司 | System and method for active print consistency control and damage protection |
| CN108760187A (en) * | 2018-06-29 | 2018-11-06 | 江苏金风科技有限公司 | Blade crack state monitoring method, monitoring system and blade |
| CN108760187B (en) * | 2018-06-29 | 2021-01-22 | 江苏金风科技有限公司 | Blade cracking state monitoring method and system and blade |
| EP3783329A4 (en) * | 2018-06-29 | 2021-06-16 | Jiangsu Goldwind Science & Technology Co., Ltd. | Monitoring method and monitoring system for cracking state of blade, and blade |
| AU2019296572B2 (en) * | 2018-06-29 | 2021-09-16 | Jiangsu Goldwind Science & Technology Co., Ltd. | Monitoring method for cracking state of blade, monitoring system, and blade |
| CN109854460A (en) * | 2019-03-28 | 2019-06-07 | 米建军 | Fan blade detection method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1054916C (en) | 2000-07-26 |
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