CN104399980B - Measure and control device and the investigating method thereof of the molten drop course of injection that declines as required based on image processing - Google Patents
Measure and control device and the investigating method thereof of the molten drop course of injection that declines as required based on image processing Download PDFInfo
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Abstract
Measure and control device and the investigating method thereof of the molten drop course of injection that declines as required based on image processing, belong to on-demand jet printing technical field. To reach gradually stable state by the micro-molten drop injection apparatus of manual adjustments metal and waste time and energy in order to solve, and stability that can not real-time ensuring course of injection, be difficult to reach the problem of accurate control requirement. The present invention adopts filming apparatus to coordinate the stroboscopic light source that sprays synchronised with micro-molten drop, obtain the realtime graphic of micro-molten drop course of injection, through IMAQ and obtain the real time information of micro-molten drop course of injection after managing resume module everywhere, the feature that droplet ejection signal controlling module 3 is extracted according to image, judge whether satisfied the imposing a condition of indices of the micro-molten drop of metal, and change and drive the relevant parameter of signal to adjust by droplet ejection signal controlling module, until indices reaches the condition of setting; Spray and print deposition. It regulates the micro-molten drop injection apparatus of metal to reach gradually stable state during for on-demand jet printing.
Description
Technical field
The invention belongs to on-demand jet printing technical field.
Background technology
Applying, on-demand jet printing technology is carried out metal parts jet deposition printing shaping, the interconnected salient point of microelectronics Packaging is beatenIn the process printing, need accurately to control the micro-molten drop of metal and be deposited on substrate with certain size, speed, to ensure mouldingThe stability of journey and accuracy. The micro-molten drop of metal produces axial vibration by the drive vibrating arm of piezoelectric ceramic transducer, by goldBelong to micro-molten drop and squeeze out from tiny nozzle, one is relevant with nozzle diameter for the size of the micro-molten drop of metal, but by controlSystem drives the drive waveforms of piezoelectric ceramics, can accurately control the course of injection of the micro-molten drop of metal, removal satellite droplet 13Produce, accurately controlling dimension size, jet velocity and spray the pattern of micro-molten drop, thus affect the deposition of the micro-molten drop of metalMoulding.
The micro-molten drop injection apparatus of existing a kind of on-demand metal, its operation principle is: vibrating arm end and nozzle and crucible formCavity volume change, in the time that Piezoelectric Ceramic vibrating arm vibrates along axis direction, micro melting metal by fromPush away and form micro-molten drop at nozzle place. Also have a kind of on-demand water droplet course of injection that is used for, make pottery by manual adjustments piezoelectricityThe drive waveforms of porcelain reduces the method that satellite droplet 13 produces.
Spray for the micro-molten drop of on-demand metal the experience that real process obtains, in preparations such as process metal molten insulationsAfter, in the time that micro-molten drop injecting-generating device has just been started working, even if use last time identical course of injection control parameter to start sprayPenetrate, often can obtain different micro-molten drop course of injection parameters yet, drop can not spray out sometimes, and drop sprays sometimesThe size of speed and formation also can be inconsistent, regulates, and reach gradually while therefore needing to start by manual adjustments waveformTo stable state, and manual adjustments course of injection is wasted time and energy, and stability that can not real-time ensuring course of injection, is difficult to reachTo the requirement of accurately controlling.
Summary of the invention
The object of the invention is that existing to reach gradually stable state time-consuming by the micro-molten drop injection apparatus of manual adjustments metal in order to solveEffort, and stability that can not real-time ensuring course of injection, be difficult to reach the problem of accurate control requirement, the invention provides onePlant measure and control device and the investigating method thereof of the molten drop course of injection that declines as required based on image processing.
The measure and control device of the molten drop course of injection that declines as required based on image processing of the present invention,
Described device comprises filming apparatus 1, stroboscopic light source 2, droplet ejection signal controlling module 3, IMAQ and processingModule 4, stroboscopic light source drive signal generating module 5, piezoelectric ceramic drive signal generation module 6, Piezoelectric Ceramic letterNumber amplifying power supply 11 and stroboscopic light source drives signal to amplify power supply 12;
Filming apparatus 1 and stroboscopic light source 2 are placed on the nozzle 9c same level height with the micro-molten drop injection apparatus 9 of metal,Control filming apparatus 1 by droplet ejection signal controlling module 3 and take the micro-molten drop of metal that nozzle 9c sprays, stroboscopic light source2 bias lights when taking, the image that filming apparatus 1 is taken inputs to IMAQ and processing module 4, IMAQAnd processing module 4 exports signal after treatment, and described signal after treatment is inputed to droplet ejection signal controlling module 3;
Droplet ejection signal controlling module 3 is according to signal controlling piezoelectric ceramic drive signal generation module 6 after treatment and stroboscopicLight source drive signal generation module 5 exports respectively piezoelectric ceramic drive signal and stroboscopic light source drives signal, described piezoelectric ceramicsDrive signal and stroboscopic light source to drive signal to input to respectively piezoelectric ceramic drive signal and amplify power supply 11 and stroboscopic light source drivingSignal amplifies power supply 12, and the amplifying signal that piezoelectric ceramic drive signal amplification power supply 11 is exported inputs to the micro-molten drop of metal and spraysThe piezoelectric ceramic transducer 9a of device 9, the amplifying signal that stroboscopic light source drives signal amplification power supply 12 to export inputs to metalThe stroboscopic light source of micro-molten drop injection apparatus 9.
Described filming apparatus 1 is CCD or CMOS camera.
Stroboscopic light source 2 is LED stroboscopic light source, is made up of LED array.
Described device comprises motlten metal retracting device 7, and described motlten metal retracting device 7 is arranged on described nozzle 9c'sBelow.
The investigating method of the measure and control device of the molten drop course of injection that declines as required based on image processing, described method comprises following stepRapid:
Step 1: droplet ejection signal controlling module 3 is controlled the initial pressure of piezoelectric ceramic drive signal generation module 6 to setElectroceramics drive piezoelectric ceramic transducer 9a produces axial stretching vibration; Control stroboscopic light source simultaneously and drive signalModule 5 occurs and send stroboscopic light source drive stroboscopic light source 2, described stroboscopic light source drives signal and drives piezoelectric ceramicsDriving signal is synchronous;
Step 2: droplet ejection signal controlling module 3 is controlled filming apparatus 1 photographic images, IMAQ and processing module 4Image to the micro-molten drop 10 of metal is processed in real time, and droplet ejection signal controlling module 3 is divided image after treatmentAnalyse, judge whether nozzle 9c sprays motlten metal, if so, proceed to step 4, if not, proceed to step 3;
Step 3: the piezoelectricity that droplet ejection signal controlling module 3 is sent by changing piezoelectric ceramic drive signal generation module 6The parameter of ceramic driving signal, strengthens the vibration of piezoelectric ceramic transducer 9a, and filming apparatus 1 is 2 of stroboscopic light sourcesGo out photographic images under stroboscopic light source, proceed to step 2, the stroboscopic light source of described stroboscopic light source 2 drives signal and described piezoelectricity potteryPorcelain drives signal synchronous;
Step 4: droplet ejection signal controlling module 3 is extracted the feature of image after treatment, sentences according to individual featuresWhether the indices of the disconnected micro-molten drop 10 of metal meets imposes a condition, if do not meet, proceeds to step 5; , until take dressSatisfied the imposing a condition of feature of putting the image of 1 shooting, proceeds to step 5; If meet, proceed to step 6;
Step 5: according to imposing a condition of the individual features of extracting and indices, change and become piezoelectric ceramic drive signal generationThe relevant parameter of the piezoelectric ceramic drive signal that module 6 is sent, proceeds to step 2;
Step 6: droplet ejection signal controlling module 3 is controlled piezoelectric ceramic drive signal generation module 6 and stopped sending piezoelectricity potteryPorcelain drives signal, keeps stroboscopic light source to drive signal generating module 5 to export stroboscopic light source and drives signal, proceeds to step 7;
Step 7: remove motlten metal retracting device 7, need according to deposition, droplet ejection signal controlling module 3 is controlled and pressedElectroceramics drives signal generating module 6 to export piezoelectric ceramic drive signal, carries out the injection of the micro-molten drop 10 of metal and prints and sinkLong-pending.
In step 5: according to imposing a condition of the individual features of extracting and indices, change change piezoelectric ceramic drive signal and send outThe relevant parameter of the piezoelectric ceramic drive signal that raw module 6 is sent comprises:
When image after treatment produces satellite droplet 13, droplet ejection signal controlling module 3 is by changing Piezoelectric CeramicThe relevant parameter of the piezoelectric ceramic drive signal that signal generating module 6 is sent reduces the tail length of the micro-molten drop 10 of metal,Thereby removal satellite droplet;
Within the diameter dimension of the micro-molten drop 10 of metal in image after treatment is not being set size, droplet ejection signal controllingThe relevant parameter of the piezoelectric ceramic drive signal that module 3 is sent by change piezoelectric ceramic drive signal generation module 6 regulatesThe diameter dimension of the micro-molten drop 10 of metal, meets and sets size;
In the jet velocity of the micro-molten drop 10 of metal in image after treatment is not setting value, droplet ejection signal controlling moduleThe parameter of 3 piezoelectric ceramic drive signal of sending by change piezoelectric ceramic drive signal generation module 6 regulates metal micro-moltenDrip 12 jet velocity, meet setting value.
In described step 2: IMAQ and processing module carry out processing and comprising in real time to the image of the micro-molten drop 10 of metal: figureAs sampling and processing module 4, the image of the micro-molten drop 10 of metal is carried out to binaryzation, filtering, profile extraction and barycenter extraction placeReason.
Beneficial effect of the present invention is, adopts filming apparatus 1 to coordinate the stroboscopic light source 2 that sprays synchronised with micro-molten drop, canTo obtain the realtime graphic of micro-molten drop course of injection, after processing, image obtains the real time information of micro-molten drop course of injection, judgementWhether there is satellite droplet to produce, and drive the relevant parameter of the waveform of signal by 3 changes of droplet ejection signal controlling moduleRemove satellite droplet; Circularity when can obtaining the size of micro-molten drop and deposit by image processing, and can be by changing frequentlyThe phase place in flash of light source 2 obtains the micro-molten drop injection scheme picture of out of phase when poor, thereby can obtain micro-molten drop jet velocity,Relatively can spray TT&C system change by the molten drop that declines as required with preset value drives the waveform parameter of signal to regulate depositionTime micro-molten drop speed, size, and circularity index while monitoring micro-molten drop deposition. The present invention is by course of injectionReal-time detection and the regulation and control of procedure parameter, avoid manually debugging the shortcoming that drive waveforms wastes time and energy and accuracy is low, realizes micro-Molten drop is printed the accurately controlled of deposition.
Brief description of the drawings
Fig. 1 is the measure and control device of the molten drop course of injection that declines as required based on image processing described in detailed description of the invention onePrinciple schematic.
Fig. 2 is in detailed description of the invention two, the principle schematic that contains satellite droplet in the micro-molten drop 10 of nozzle 9c ejection metal.
Fig. 3 is the waveform schematic diagram of piezoelectric ceramic drive signal in the embodiment of detailed description of the invention, and wherein A represents amplitude,T indication cycle.
Fig. 4 is stroboscopic light source drive signal waveform schematic diagram in the embodiment of detailed description of the invention.
Detailed description of the invention
Detailed description of the invention one: in conjunction with Fig. 1, present embodiment is described, described in present embodiment based on image processing as requiredThe decline measure and control device of molten drop course of injection, described device comprises filming apparatus 1, stroboscopic light source 2, the control of droplet ejection signalMolding piece 3, IMAQ and processing module 4, stroboscopic light source drive signal generating module 5, piezoelectric ceramic drive signal to send outRaw module 6, piezoelectric ceramic drive signal amplify power supply 11 and stroboscopic light source drives signal to amplify power supply 12;
Filming apparatus 1 and stroboscopic light source 2 are placed on the nozzle 9c same level height with the micro-molten drop injection apparatus 9 of metal,Control filming apparatus 1 by droplet ejection signal controlling module 3 and take the micro-molten drop of metal that nozzle 9c sprays, stroboscopic light source2 bias lights when taking, the image that filming apparatus 1 is taken inputs to IMAQ and processing module 4, IMAQAnd processing module 4 exports signal after treatment, and described signal after treatment is inputed to droplet ejection signal controlling module 3;
Droplet ejection signal controlling module 3 is according to signal controlling piezoelectric ceramic drive signal generation module 6 after treatment and stroboscopicLight source drive signal generation module 5 exports respectively piezoelectric ceramic drive signal and stroboscopic light source drives signal, described piezoelectric ceramicsDrive signal and stroboscopic light source to drive signal to input to respectively piezoelectric ceramic drive signal and amplify power supply 11 and stroboscopic light source drivingSignal amplifies power supply 12, and the amplifying signal that piezoelectric ceramic drive signal amplification power supply 11 is exported inputs to the micro-molten drop of metal and spraysThe piezoelectric ceramic transducer 9a of device 9, the amplifying signal that stroboscopic light source drives signal amplification power supply 12 to export inputs to metalThe stroboscopic light source of micro-molten drop injection apparatus 9.
In present embodiment, described filming apparatus 1 is CCD or CMOS camera, and stroboscopic light source 2 is LED stroboscopic light source,Formed by LED array.
Filming apparatus 1 be placed on the micro-molten drop injection apparatus of metal nozzle 9c same level height on, filming apparatus 1 camera lensJust to stroboscopic light source 2, like this stroboscopic light source 2 as a setting light source use, stroboscopic light source 2 is made up of LED array, to protectCard can cover enough large region, uses, when the micro-molten drop 10 of metal is by filming apparatus 1 and LED for IMAQBetween stroboscopic light source 2 time, can obtain background is micro-droplet photos of light source.
Described device comprises motlten metal retracting device 7, and described motlten metal retracting device 7 is arranged on described nozzle 9c'sBelow.
Before carrying out micro-molten drop 10 injections of metal, motlten metal retracting device 7 is placed on the below of nozzle 9c, to protectThe micro-molten drop of metal that card ejects can not deposit to the printing deposition making the mistake in deposition substrate 8.
The piezoelectric ceramic drive signal of present embodiment adopts the virtual instrument-droplet based on computer and the programming of AD/DA cardInjection signal control module 3 is controlled and is produced trapezoidal wave driving signal, and the parameter such as waveform and frequency, amplitude of driving signal canIn droplet ejection signal controlling module 3, carry out adjustablely arbitrarily for the melt of different physical property, signal is believed through Piezoelectric CeramicNumber amplify power supply 11 amplify rear drive piezoelectric ceramics drive vibrating arm produce axial vibration; Droplet ejection signal controlling mould simultaneouslyPiece 3 is controlled and is produced another paths of LEDs stroboscopic light source driving signal, and one is square-wave signal, and this drives frequency and the piezoelectricity of signalCeramic driving synchronous waveform, the amplitude of waveform and pulsewidth with and can regulate signal with the phase place of piezoelectric ceramic drive signalDrive signal to amplify power supply 12 through stroboscopic light source and amplify rear drive LED stroboscopic light source; Adopt CCD or CMOS camera to takeThe image of micro-molten drop course of injection, obtains the feature of micro-molten drop, droplet ejection signal controlling through IMAQ and processing module 4The information such as whether module 3 judges the generation of satellite droplet 13 and micro-molten drop jet velocity in course of injection, size, soCompare with predetermined value afterwards, droplet ejection signal controlling module 3 automatically changes drive waveforms parameter and drives shaking of piezoelectric ceramicsMoving, thus regulate motlten metal to be extruded the course of injection that forms micro-molten drop from nozzle, reach remove satellite droplet 13,Adjust the requirement of micro-molten drop jet velocity and size, and return to the pass of course of injection by the molten drop injection TT&C system that declines as requiredBond parameter information is as droplet ejection speed, size, droplet sphericity etc.
Detailed description of the invention two: present embodiment is the molten drop that declines as required based on image processing described in detailed description of the invention oneThe investigating method of the measure and control device of course of injection, before the micro-molten drop injection apparatus 9 of metal starts to carry out droplet ejection, willMotlten metal retracting device moves under nozzle 9c; Metal material to be printed is at the micro-molten drop injection apparatus 9 of on-demand metalInside be heated to after design temperature insulation, start following method;
Described method comprises the steps:
Step 1: droplet ejection signal controlling module 3 is controlled the initial pressure of piezoelectric ceramic drive signal generation module 6 to setElectroceramics drive piezoelectric ceramic transducer 9a produces axial stretching vibration; Control stroboscopic light source simultaneously and drive signalModule 5 occurs and send stroboscopic light source drive stroboscopic light source 2, described stroboscopic light source drives signal and drives piezoelectric ceramicsDriving signal is synchronous;
Step 2: droplet ejection signal controlling module 3 is controlled filming apparatus 1 photographic images, IMAQ and processing module 4Image to the micro-molten drop 10 of metal is processed in real time, and droplet ejection signal controlling module 3 is divided image after treatmentAnalyse, judge whether nozzle 9c sprays motlten metal, if so, proceed to step 4, if not, proceed to step 3;
Step 3: the piezoelectricity that droplet ejection signal controlling module 3 is sent by changing piezoelectric ceramic drive signal generation module 6The parameter of ceramic driving signal, strengthens the vibration of piezoelectric ceramic transducer 9a, and filming apparatus 1 is 2 of stroboscopic light sourcesGo out photographic images under stroboscopic light source, proceed to step 2, the stroboscopic light source of described stroboscopic light source 2 drives signal and described piezoelectricity potteryPorcelain drives signal synchronous;
Step 4: droplet ejection signal controlling module 3 is extracted the feature of image after treatment, sentences according to individual featuresWhether the indices of the disconnected micro-molten drop 10 of metal meets imposes a condition, if do not meet, proceeds to step 5; , until take dressSatisfied the imposing a condition of feature of putting the image of 1 shooting, proceeds to step 5; If meet, proceed to step 6;
Step 5: according to imposing a condition of the individual features of extracting and indices, change and become piezoelectric ceramic drive signal generationThe relevant parameter of the piezoelectric ceramic drive signal that module 6 is sent, proceeds to step 2;
Step 6: droplet ejection signal controlling module 3 is controlled piezoelectric ceramic drive signal generation module 6 and stopped sending piezoelectricity potteryPorcelain drives signal, keeps stroboscopic light source to drive signal generating module 5 to export stroboscopic light source and drives signal, proceeds to step 7;
Step 7: remove motlten metal retracting device 7, need according to deposition, droplet ejection signal controlling module 3 is controlled and pressedElectroceramics drives signal generating module 6 to export piezoelectric ceramic drive signal, carries out the injection of the micro-molten drop 10 of metal and prints and sinkLong-pending.
In step 5: according to imposing a condition of the individual features of extracting and indices, change change piezoelectric ceramic drive signal and send outThe relevant parameter of the piezoelectric ceramic drive signal that raw module 6 is sent comprises:
As shown in Figure 2, when image after treatment produces satellite droplet 13, droplet ejection signal controlling module 3 is by changingThe relevant parameter of the piezoelectric ceramic drive signal that piezoelectric ceramic drive signal generation module 6 is sent reduces the micro-molten drop 10 of metalTail length, thereby remove satellite droplet 13;
Within the diameter dimension of the micro-molten drop 10 of metal in image after treatment is not being set size, droplet ejection signal controllingThe relevant parameter of the piezoelectric ceramic drive signal that module 3 is sent by change piezoelectric ceramic drive signal generation module 6 regulatesThe diameter dimension of the micro-molten drop 10 of metal, meets and sets size;
In the jet velocity of the micro-molten drop 10 of metal in image after treatment is not setting value, droplet ejection signal controlling moduleThe parameter of 3 piezoelectric ceramic drive signal of sending by change piezoelectric ceramic drive signal generation module 6 regulates metal micro-moltenDrip 12 jet velocity, meet setting value.
In described step 2: IMAQ and processing module carry out processing and comprising in real time to the image of the micro-molten drop 10 of metal: figureAs sampling and processing module 4, the image of the micro-molten drop 10 of metal is carried out to binaryzation, filtering, profile extraction and barycenter extraction placeReason.
After image being processed in present embodiment, extract feature, and calculate micro-molten drop course of injection and whether contain satellite droplet13 produce, and calculate the size of micro-molten drop; Drive stroboscopic light source to drive signal and piezoelectric ceramic drive signal by changePhase place, obtain the location drawing picture of micro-molten drop after phase difference, thereby calculate the jet velocity of micro-molten drop;
In present embodiment, while needs by filming apparatus 1 position as for deposition position place plane, can Real-Time Monitoring heavySpeed, size and the circularity index of micro-molten drop when long-pending.
Image after 10 ejections of the micro-molten drop of metal after image processing module is processed, if produced as Fig. 2 satellite droplet 13,Micro-molten drop spray processor system regulates the molten of jetting nozzle by changing the parameter of piezoelectric ceramic transducer drive waveforms signalMelt metal volume, reduce the tail length of the micro-molten drop 10 of metal, thereby remove satellite droplet 13.
By filming apparatus 1 and stroboscopic light source 2 be placed on deposition substrate 8 same level height on, gather the micro-molten drop of metal10 at the image that deposits to substrate moment, can calculate the micro-molten drop 10 of metal after image processing module is processed in the time of depositionCircularity, and provide in real time deviation from circular from, to control the pattern of microelectronics Packaging salient point.
Embodiment:
For obtaining the stable micro-molten drop course of injection that deposition requires that meets, the piezoelectric ceramics under drive waveforms signal function changesThe mechanical oscillation process that energy device 9a produces is most important. The present invention adopts trapezoidal wave to drive signal as piezoelectric ceramic transducerWaveform, as Fig. 3. Drive trapezoidal wave to be divided into three parts by driving effect: the Ts stage is that piezoelectric ceramic transducer is at signal functionLower distortion drives oscillator to release the stage, and this stage is that micro-molten drop is forced to from the nozzle ejection stage, when the amplitude A of waveform and TsBetween length affect jet velocity; Tb is that waveform signal reaches amplitude and keeps static, thereby oscillator also remains on and stretches out thereuponCertain hour static, now motlten metal continues ejection with inertia, and this stage can affect the size of the micro-molten drop 10 of metal;Tx is that piezoelectric ceramic transducer is out of shape drive oscillator recovery stage under signal function, and motlten metal is disconnected from the liquid stream of ejectionSplit and form the micro-molten drop 10 of metal, this stage can be on affecting the generation of satellite droplet 13.
In the time that droplet ejection signal controlling module 3 detects without micro-molten drop generation, automatically progressively regulate and increase piezoelectric ceramics transducingThe amplitude of device drive signal waveform and reduce Ts value, until motlten metal sprays from nozzle 9c. When micro-molten drop 10 being detectedJet velocity while being less than setting range, automatically progressively regulate and increase the amplitude of piezoelectric ceramic transducer drive signal waveform and subtractLittle Ts value, in the time detecting that the jet velocity of micro-molten drop 10 reaches in setting range, automatically progressively regulates and reduces piezoelectric ceramics and changeThe amplitude of energy device drive signal waveform and increase Ts value; In the time detecting that the diameter of micro-molten drop 10 is less than setting range, automaticallyProgressively regulate and increase Tb value, in the time detecting that the diameter of micro-molten drop 10 is greater than setting range, automatically progressively regulate and reduce TbValue; When detecting while having satellite droplet 13 to produce with the generation of micro-molten drop 10, automatically progressively regulate and reduce Tb value, simultaneouslyReduce Tx value.
What stroboscopic light source drove signal employing is square wave, as shown in Figure 4.
In sum, be only preferably detailed description of the invention of the present invention, but the present invention is not limited to above-mentioned protection domain,For example piezoelectric ceramic transducer drive signal waveform is trapezoidal wave, also can use the waveforms such as triangular wave, sine wave, index shape rippleAnd combination, can control micro-molten drop course of injection by the variation that changes waveform rise and fall, be anyly familiar with this technologyThe technical staff in field the present invention disclose technical scope in, the simple change of the technical scheme that can obtain apparently orEquivalence is replaced and is all fallen within the scope of protection of the present invention.
Claims (7)
1. the measure and control device of the molten drop course of injection that declines as required based on image processing, it is characterized in that, described device comprises that filming apparatus (1), stroboscopic light source (2), droplet ejection signal controlling module (3), IMAQ and processing module (4), stroboscopic light source drive signal generating module (5), piezoelectric ceramic drive signal generation module (6), piezoelectric ceramic drive signal to amplify power supply (11) and stroboscopic light source drives signal to amplify power supply (12);
Filming apparatus (1) and stroboscopic light source (2) are placed on nozzle (9c) the same level height with the micro-molten drop injection apparatus of metal (9), control filming apparatus (1) by droplet ejection signal controlling module (3) and take the micro-molten drop of metal that nozzle (9c) sprays, the bias light of stroboscopic light source (2) when taking, the image that filming apparatus (1) is taken inputs to IMAQ and processing module (4), IMAQ and processing module (4) are exported signal after treatment, and described signal after treatment is inputed to droplet ejection signal controlling module (3),
Droplet ejection signal controlling module (3) is according to signal controlling piezoelectric ceramic drive signal generation module after treatment (6) and stroboscopic light source drives signal generating module (5) to export respectively piezoelectric ceramic drive signal and stroboscopic light source drives signal, described piezoelectric ceramic drive signal and stroboscopic light source drive signal to input to respectively piezoelectric ceramic drive signal amplification power supply (11) and stroboscopic light source drives signal to amplify power supply (12), the amplifying signal of piezoelectric ceramic drive signal amplification power supply (11) output inputs to the piezoelectric ceramic transducer (9a) of the micro-molten drop injection apparatus of metal (9), the amplifying signal that stroboscopic light source drives signal to amplify power supply (12) output inputs to the stroboscopic light source of the micro-molten drop injection apparatus of metal (9).
2. the measure and control device of the molten drop course of injection that declines as required based on image processing according to claim 1, is characterized in that, described filming apparatus (1) is CCD or CMOS camera.
3. the measure and control device of the molten drop course of injection that declines as required based on image processing according to claim 1, is characterized in that, stroboscopic light source (2) is LED stroboscopic light source, is made up of LED array.
4. the measure and control device of the molten drop course of injection that declines as required based on image processing according to claim 1, it is characterized in that, described device comprises motlten metal retracting device (7), and described motlten metal retracting device (7) is arranged on the below of described nozzle (9c).
5. the investigating method of the measure and control device of the molten drop course of injection that declines as required based on image processing claimed in claim 4, is characterized in that, described method comprises the steps:
Step 1: droplet ejection signal controlling module (3) is controlled piezoelectric ceramic drive signal generation module (6) and driven piezoelectric ceramic transducer (9a) to produce axial stretching vibration with the initial piezoelectric ceramic drive signal of setting; Control stroboscopic light source simultaneously and drive signal generating module (5) to send stroboscopic light source drive stroboscopic light source (2), described stroboscopic light source drives signal and drives piezoelectric ceramic drive signal and synchronize;
Step 2: droplet ejection signal controlling module (3) is controlled filming apparatus (1) photographic images, IMAQ and processing module (4) are processed in real time to the image of the micro-molten drop of metal (10), droplet ejection signal controlling module (3) is analyzed image after treatment, judge whether nozzle (9c) sprays motlten metal, if, proceed to step 4, if not, proceed to step 3;
Step 3: the parameter of the piezoelectric ceramic drive signal that droplet ejection signal controlling module (3) is sent by change piezoelectric ceramic drive signal generation module (6), the vibration of piezoelectric ceramic transducer (9a) is strengthened, filming apparatus (1) sends photographic images under stroboscopic light source at stroboscopic light source (2), proceed to step 2, the stroboscopic light source of described stroboscopic light source (2) drives signal to synchronize with described piezoelectric ceramic drive signal;
Step 4: droplet ejection signal controlling module (3) is extracted the feature of image after treatment, judges that according to individual features whether the indices of the micro-molten drop of metal (10) meets and impose a condition, if do not meet, proceeds to step 5; Impose a condition until the feature of the image that filming apparatus (1) is taken meets, proceed to step 5; If meet, proceed to step 6;
Step 5: according to imposing a condition of the individual features of extracting and indices, the relevant parameter of the piezoelectric ceramic drive signal that change change Piezoelectric Ceramic signal generating module (6) is sent, proceeds to step 2;
Step 6: droplet ejection signal controlling module (3) is controlled piezoelectric ceramic drive signal generation module (6) and stopped sending piezoelectric ceramic drive signal, keep stroboscopic light source to drive signal generating module (5) output stroboscopic light source to drive signal, proceed to step 7;
Step 7: remove motlten metal retracting device (7), need according to deposition, droplet ejection signal controlling module (3) is controlled piezoelectric ceramic drive signal generation module (6) output piezoelectric ceramic drive signal, carries out the injection of the micro-molten drop of metal (10) and prints deposition.
6. the investigating method of the measure and control device of the molten drop course of injection that declines as required based on image processing according to claim 5, it is characterized in that, in step 5: according to imposing a condition of the individual features of extracting and indices, the relevant parameter of the piezoelectric ceramic drive signal that change change Piezoelectric Ceramic signal generating module (6) is sent comprises:
When image after treatment produces satellite droplet (13), the relevant parameter of the piezoelectric ceramic drive signal that droplet ejection signal controlling module (3) is sent by change piezoelectric ceramic drive signal generation module (6) reduces the tail length of the micro-molten drop of metal (10), thereby removes satellite droplet;
Within the diameter dimension of the micro-molten drop of metal (10) in image after treatment is not being set size, the relevant parameter of the piezoelectric ceramic drive signal that droplet ejection signal controlling module (3) is sent by change piezoelectric ceramic drive signal generation module (6) regulates the diameter dimension of the micro-molten drop of metal (10), meets and sets size;
In the jet velocity of the micro-molten drop of metal (10) in image after treatment is not setting value, the parameter of the piezoelectric ceramic drive signal that droplet ejection signal controlling module (3) is sent by change piezoelectric ceramic drive signal generation module (6) regulates the jet velocity of the micro-molten drop 12 of metal, meets setting value.
7. the investigating method of the measure and control device of the molten drop course of injection that declines as required based on image processing according to claim 5, it is characterized in that, in described step 2: IMAQ and processing module carry out processing and comprising in real time to the image of the micro-molten drop of metal (10): IMAQ and processing module (4) are carried out binaryzation, filtering, profile extraction and barycenter extraction process to the image of the micro-molten drop of metal (10).
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| TWI489098B (en) * | 2014-03-11 | 2015-06-21 | Utechzone Co Ltd | Defect detection method and defect detection device |
| CN105043941B (en) * | 2015-08-28 | 2018-03-30 | 厦门理工学院 | A kind of molten drop information collecting device and its method |
| CN108507905A (en) * | 2018-06-29 | 2018-09-07 | 华中科技大学 | A kind of micro fluid viscosity measurement technology sprayed using drop |
| CN113500214B (en) * | 2021-07-06 | 2022-07-01 | 西北工业大学 | Real-time capturing system for simulating metal droplet chasing fusion process under microgravity |
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