Grid silk preparation method, grid silk, structural member fatigue fracture monitoring device, systemTechnical field
The present invention relates to mining machinery field, more particularly to a kind of preparation method of structural member fatigue fracture monitoring device,Structural member fatigue fracture monitoring device and system.
Background technology
Among the damage failure of mechanical structure, fatigue failure is one of chief destructive pattern.Because material is inevitableMicrodefect or microfissure be present in ground, in the presence of the factors such as fatigue load, environmental corrosion, microdefect and microfissureIt can gradually extend, and ultimately result in structural member failure, or even can cause a serious accident.In order to ensure device structure safely and reliablyWork, it is necessary to be monitored in real time to large scale equipment, the running status of important feature, structural damage, failure etc..At present, commonly useStructural member fatigue fracture monitoring method include non-destructive monitoring method, vibration analysis detection method, still, non-destructive monitoring method needs costlinessSpecial equipment, and majority could be detected in the case of shutdown, poor real, for the system that runs at high speed andSudden crack fault is difficult to；Because the vibration component of complex mechanical system is complicated, antijamming capability is poor, vibration analysisDetection method is huge in processing complex mechanical system hour operation quantity, and accuracy of identification is poor.Meanwhile large-scale engineering machinery field is much setStandby structural member also has no idea to monitor equipment in real time in equipment running process by space limits.
The content of the invention
In view of this, be badly in need of a kind of small volume in practical application, can be on real-time watch device in equipment running processParts crack conditions, and accuracy of identification it is higher structural member fatigue fracture monitoring technical scheme.The embodiment of the present inventionA kind of preparation method of structural member fatigue fracture monitoring device is provided, methods described includes：
Grid groove pattern is etched in substrate surface；
Inert metal grind into powder is obtained into metal powder；
The metal powder is dissolved to after obtaining mixed solution in volatile solvent, the mixed solution is injected into the gridIn groove；
The grid silk in the grid groove is obtained after volatile solvent volatilization.
Preferably, obtain also comprising the following steps in the grid silk in the grid groove after volatile solvent volatilization：
Remove metal material unnecessary outside the grid groove.
Preferably, the volatile solvent is alcohol or gasoline.
Preferably, the inert metal is silver.
Preferably, the grid groove is etched into S types, square wave type or sawtooth pattern.
Present invention also offers a kind of grid silk, the grid silk is made of any one above-mentioned grid silk preparation method.
The embodiment of the present invention additionally provides a kind of structural member fatigue fracture monitoring device, and described device includes using above-mentionedAnticipate grid silk made of a kind of grid silk preparation method, in addition to：
Substrate, form be embedded in the grid silk shape identical grid groove, the grid silk in the grid groove thereon；
First lead and the second lead, it is connected and extends on the outside of the substrate with the both ends of the grid silk respectively；
Insulating trip, it is arranged on the substrate.
Preferably, the grid groove is provided at both ends with the first contact and the second contact；One end of the grid silk and described theOne contact portion, the other end and second contact portion；One end of first lead and first contact portion, it is describedOne end of second lead and second contact portion.
Preferably, one end of the grid silk, one end of first lead are welded admittedly with first contact by solderIt is fixed；The other end of the grid silk, one end and second contact of second lead are welded and fixed by solder.
The embodiment of the present invention additionally provides a kind of structural member fatigue fracture monitoring system, and the system includes：
Power supply, contactor, alarm module and any one above-mentioned structural member fatigue fracture monitoring device, the power supply and instituteMonitoring device, the contactor and the alarm module is stated to connect to form loop；Wherein：
The monitoring device is pasted on the measured surface of monitored structural member, and the grid silk in the monitoring device is in the quiltSurvey surface is broken when cracked；
The contactor closes when the grid silk is broken；
The alarm module sends alarm when the contactor closes.
Grid silk preparation method provided in an embodiment of the present invention, grid silk, structural member fatigue fracture monitoring device, system, canParts crack conditions in equipment running process on real-time watch device, and accuracy of identification is higher, occurs in structural memberDuring fatigue fracture, can Realtime Alerts, reduce due to there is structural member fatigue fracture and caused accident.
Brief description of the drawings
Fig. 1 is the flow chart for the grid silk preparation method that the embodiment of the present invention one provides；
Fig. 2 is the structural representation for the structural member fatigue fracture monitoring device that the embodiment of the present invention two provides；
Fig. 3 is the structural representation for the structural member fatigue fracture monitoring device that the embodiment of the present invention three provides；
Fig. 4 a are the schematic diagram of the warning circuit for the structural member fatigue fracture monitoring system that the embodiment of the present invention four provides；
Fig. 4 b are the schematic diagram of the application method for the structural member fatigue fracture monitoring system that the embodiment of the present invention four provides.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, hereinafter with reference to attached in the embodiment of the present inventionFigure, technical scheme is clearly and completely described by embodiment, it is clear that described embodiment is the present invention oneSection Example, rather than whole embodiments.
Embodiment one
As shown in figure 1, present embodiments provide a kind of preparation method of structural member fatigue fracture monitoring device.
101st, grid groove pattern is etched in substrate surface.
Go out grid groove pattern in substrate surface laser-induced thermal etching.Wherein, the cross-sectional area of grid groove is 0.3 to 1 square millimeter,In practical application, the cross-sectional area of grid groove can also take other appropriate values according to being actually needed；The shape of grid groove can be S types,Square wave type or sawtooth pattern etc..
102nd, inert metal grind into powder is obtained into metal powder.
In general inert metal has preferable plasticity and ductility in itself, but after being ground into metal powder, then weighNewly condensing together, its plasticity and ductility will be deteriorated, when monitored structural part fractures, the grid silk made of metal powderAlso it can therewith be broken, therefore structural member surface can be real-time monitored and be broken.
The inert metal selected in the present embodiment is silver.Silver powder under high circulation stress easily will not fatigue fracture,Therefore it is highly suitable as the material of fatigue fracture monitoring device.In actual applications, other inert metal materials can also be usedInstead of ag material, such as golden material.
103rd, metal powder is dissolved in volatile solvent and obtains mixed liquor, by mixed liquor injection grid groove.
Metal powder is dissolved in volatile solvent (such as alcohol or gasoline etc.), then injected mixed liquor on substrateIn the grid groove etched.
104th, the grid silk in grid groove is obtained after volatile solvent volatilization.
105th, metal material unnecessary outside the grid groove is removed.
This step is optional step, can also be clear by metal material unnecessary outside grid groove after volatile solvent volatilizationReason is clean.
Embodiment two
Present embodiments provide a kind of structural member fatigue fracture monitoring device.
As shown in Fig. 2 the structural member fatigue fracture monitoring device that the present embodiment provides includes：Substrate 1, grid silk 2, insulating trip3rd, the first lead 41, the second lead 42.Grid groove 11 is formed on substrate 1；Grid silk 2 have with the identical shape of grid groove 11, inlayIn grid groove 11；Insulating trip 3 is arranged on the upper strata of substrate 1, and is transparent insulation piece；One end of first lead 41 and grid silk 2Connection, the second lead 42 is connected with the other end of grid silk 2, and the first lead 41 and the second lead 42 all extend to the outside of substrate 1.The cross-sectional area of grid groove 11 can be S types, square wave type or sawtooth pattern between 0.3 to 1 square millimeter.Grid silk 2 and grid groove 11Size is adapted, and is embedded in grid groove 11.
Embodiment three
Present embodiments provide a kind of structural member fatigue fracture monitoring device.
As shown in figure 3, the structural member fatigue fracture monitoring device that the present embodiment provides includes：Substrate 1, grid silk 2, insulating trip3rd, the first lead 41, the second lead 42, the first contact 51, the second contact 52.Grid groove 11 is formed on substrate 1；Grid silk 2 have withThe identical shape of grid groove 11, is embedded in grid groove 11；Insulating trip 3 is arranged on the upper strata of substrate 1；Touch the first contact 51 and secondThe both ends that point 52 is respectively arranged at grid groove 11, the one end of one end of the first lead 41 with grid silk 2 at the first contact 51 pass through welderingMaterial is welded and fixed, and the other end of one end of the second lead 42 with grid silk 2 at the second contact 52 is welded and fixed by solder, and firstThe lead 42 of lead 41 and second all extends to the outside of substrate 1.
Example IV
A kind of structural member fatigue fracture monitoring system is present embodiments provided, the system includes any in embodiment two, threeA kind of structural member fatigue fracture monitoring device, power supply, contactor and alarm module.
In the present embodiment, structural member fatigue fracture monitoring system includes structural member fatigue fracture monitoring device, power supply, connectTentaculum and alarm module.As shown in fig. 4 a, structural member fatigue fracture monitoring device D, power supply U, contactor C and alarm module A stringsConnection forms warning circuit W, and contactor C is normally open.Structural member fatigue fracture monitoring device D is pasted on monitored structural memberThe easy cracked position in surface.As shown in Figure 4 b, the arrangement of structural member fatigue fracture monitoring device D grid silk 2 moves towards aThe propagation direction b of crackle with being likely to occur is vertical, when the position of monitored structural member is cracked, makees caused by crackleStructural member fatigue fracture monitoring device D substrate is firmly caused to deform upon, while substrate produces stress to grid silk 2, as long as gridSilk 2 has to be disconnected at one, and the coil of contactor, which will lose magnetism, is changed into closure state so that warning circuit turns on, alarm moduleSend sound and light alarm signal.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；AlthoughThe present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be usedTo be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic；And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit andScope.