CN104399980A - Measuring and controlling device for on-demand micro drop injection process based on image processing and measuring and controlling method thereof - Google Patents
Measuring and controlling device for on-demand micro drop injection process based on image processing and measuring and controlling method thereof Download PDFInfo
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Abstract
The invention discloses a measuring and controlling device for on-demand micro drop injection process based on image processing and a measuring and controlling method thereof and belongs to the on-demand injection printing technical field. In order to solve the problems the time and energy are wasted for manually regulating the metal micro drop injection device for gradually achieving the stable state, the stability of the injection process cannot be guaranteed at real time and the accuracy control requirement is difficult to achieve. The shooting device and the stroboscopic light source being synchronous with the micro drop injection are adopted for obtaining the real time image of the micro drop injection process, the image is processed by an image collecting and processing module for obtaining the real time information of the micro drop injection process, a micro drop injection signal module 3 judges whether the index of the metal micro drop satisfies the preset condition according to the image extractive characteristic, and the micro drop injection signal control module changes the corresponding parameter of the drive signal for adjusting until that the index satisfies the presser condition; injecting, printing and depositing. The metal micro drop injection device is regulated for gradually achieving the stable state for the on-demand injecting and printing operation.
Description
Technical field
The invention belongs to on-demand jet printing technical field.
Background technology
Carry out in the process of metal parts jet deposition printing shaping, the interconnected salient point printing of microelectronics Packaging in application on-demand jet printing technology, need accurately to control the micro-molten drop of metal with certain size, deposition rate on substrate, to ensure stability and the accuracy of forming process.The micro-molten drop of metal produces axial vibration by the drive vibrating arm of piezoelectric ceramic transducer, micro-for metal molten drop is squeezed out from tiny nozzle, one is relevant with nozzle diameter for the size of the micro-molten drop of metal, but by controlling the drive waveforms driving piezoelectric ceramics, accurately can control the course of injection of the micro-molten drop of metal, remove the generation of satellite droplet 13, precise control of sizes size, jet velocity and spray the pattern of micro-molten drop, thus affect the deposition modeling of the micro-molten drop of metal.
The micro-molten drop injection apparatus of existing a kind of on-demand metal, its operation principle is: the cavity volume that vibrating arm end and nozzle and crucible are formed changes, when Piezoelectric Ceramic vibrating arm vibrates in the axial direction, micro melting metal is extruded away from nozzle forms micro-molten drop.A kind of being used for is also had in on-demand water droplet course of injection, manually to regulate the method that the drive waveforms of piezoelectric ceramics produces to reduce satellite droplet 13.
For the experience that on-demand metal micro-molten drop injection real process obtains, after the preparations such as metal molten insulation, when micro-molten drop injecting-generating device is just started working, even if use previous identical course of injection controling parameters to start to spray, also different micro-molten drop course of injection parameters can often be obtained, namely drop can not spray out sometimes, sometimes the size of function of jet velocity and formation also can be inconsistent, therefore need manually to regulate waveform to regulate when starting, and reach stable state gradually, and manual adjustments course of injection is wasted time and energy, and can not the stability of real-time ensuring course of injection, be difficult to reach the requirement accurately controlled.
Summary of the invention
The object of the invention is existing reach stable state gradually and waste time and energy by the micro-molten drop injection apparatus of manual adjustments metal to solve, and can not the stability of real-time ensuring course of injection, be difficult to the problem reaching accurate control overflow, the invention provides a kind of measure and control device and investigating method thereof of the molten drop course of injection that declines as required based on image procossing.
The measure and control device of the molten drop course of injection that declines as required based on image procossing of the present invention,
Described device comprises filming apparatus 1, stroboscopic light source 2, droplet ejection signal control module 3, image variants module 4, stroboscopic light source drive singal generation module 5, piezoelectric ceramic drive signal generation module 6, piezoelectric ceramic drive signal amplifies power supply 11 and stroboscopic light source drive singal amplifies power supply 12;
Filming apparatus 1 and stroboscopic light source 2 are placed on the nozzle 9c same level height of micro-molten drop injection apparatus 9 with metal, the micro-molten drop of metal that filming apparatus 1 takes nozzle 9c injection is controlled by droplet ejection signal control module 3, bias light when stroboscopic light source 2 is for taking, the image that filming apparatus 1 is taken inputs to image variants module 4, signal after image variants module 4 output processing, and the signal after described process is inputed to droplet ejection signal control module 3;
Droplet ejection signal control module 3 controls piezoelectric ceramic drive signal generation module 6 according to the signal after process and stroboscopic light source drive singal generation module 5 exports piezoelectric ceramic drive signal and stroboscopic light source drive singal respectively, described piezoelectric ceramic drive signal and stroboscopic light source drive singal input to piezoelectric ceramic drive signal respectively and amplify power supply 11 and stroboscopic light source drive singal amplification power supply 12, the amplifying signal that piezoelectric ceramic drive signal amplification power supply 11 exports inputs to the piezoelectric ceramic transducer 9a of the micro-molten drop injection apparatus 9 of metal, the amplifying signal that stroboscopic light source drive singal amplification power supply 12 exports inputs to the stroboscopic light source of the micro-molten drop injection apparatus 9 of metal.
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 the below of described nozzle 9c.
Based on the investigating method of the measure and control device of the molten drop course of injection that declines as required of image procossing, described method comprises the steps:
Step one: droplet ejection signal control module 3 controls piezoelectric ceramic drive signal generation module 6 and drives piezoelectric ceramic transducer 9a to produce axial stretching vibration with the initial piezoelectric ceramic driving signal of setting; Control stroboscopic light source drive singal generation module 5 to send stroboscopic light source drive singal and drive stroboscopic light source 2, described stroboscopic light source drive singal is with to drive piezoelectric ceramic drive signal synchronous simultaneously;
Step 2: droplet ejection signal control module 3 controls filming apparatus 1 and takes image, the image of the micro-molten drop 10 of image variants module 4 pairs of metals processes in real time, droplet ejection signal control module 3 is analyzed the image after process, judge whether nozzle 9c sprays motlten metal, if, then proceed to step 4, if not, proceed to step 3;
Step 3: the parameter of the piezoelectric ceramic drive signal that droplet ejection signal control 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 takes image under stroboscopic light source 2 sends stroboscopic light source, proceed to step 2, the stroboscopic light source drive singal of described stroboscopic light source 2 is synchronous with described piezoelectric ceramic drive signal;
According to individual features, step 4: the feature of droplet ejection signal control module 3 to the image after process is extracted, judges whether the indices of the micro-molten drop 10 of metal meets and imposes a condition, if do not meet, then proceed to step 5; , impose a condition until the feature of the image of filming apparatus 1 shooting meets, proceed to step 5; If meet, then proceed to step 6;
Step 5: according to the individual features of extraction and imposing a condition of indices, changes the relevant parameter becoming the piezoelectric ceramic drive signal that piezoelectric ceramic drive signal generation module 6 sends, proceeds to step 2;
Step 6: droplet ejection signal control module 3 controls piezoelectric ceramic drive signal generation module 6 and stops sending piezoelectric ceramic drive signal, keeps stroboscopic light source drive singal generation module 5 to export stroboscopic light source drive singal, proceeds to step 7;
Step 7: remove motlten metal retracting device 7, need according to deposition, droplet ejection signal control module 3 controls piezoelectric ceramic drive signal generation module 6 and exports piezoelectric ceramic drive signal, carries out the injection of the micro-molten drop 10 of metal and prints deposition.
In step 5: according to the individual features of extraction and imposing a condition of indices, change the relevant parameter becoming the piezoelectric ceramic drive signal that piezoelectric ceramic drive signal generation module 6 sends and comprise:
When the image after process produces satellite droplet 13, the relevant parameter of the piezoelectric ceramic drive signal that droplet ejection signal control module 3 is sent by change piezoelectric ceramic drive signal generation module 6 reduces the tail length of the micro-molten drop 10 of metal, thus removes satellite droplet;
When the diameter dimension of the micro-molten drop 10 of metal in the image after process is not within setting size, the relevant parameter of the piezoelectric ceramic drive signal that droplet ejection signal control module 3 is sent by change piezoelectric ceramic drive signal generation module 6 regulates the diameter dimension of the micro-molten drop 10 of metal, meets setting size;
When the jet velocity of the micro-molten drop 10 of metal in the image after process is not in setting value, the parameter of the piezoelectric ceramic drive signal that droplet ejection signal control 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.
In described step 2: the image of image variants module to the micro-molten drop of metal 10 carries out process in real time and comprise: the image of the micro-molten drop 10 of image variants module 4 pairs of metals carries out binaryzation, filtering, contours extract and barycenter extraction process.
Beneficial effect of the present invention is, filming apparatus 1 is adopted to coordinate the stroboscopic light source 2 spraying synchronised with micro-molten drop, the realtime graphic of micro-molten drop course of injection can be obtained, the real time information of micro-molten drop course of injection is obtained after image procossing, judge whether that satellite droplet produces, and removed satellite droplet by the relevant parameter that droplet ejection signal control module 3 changes the waveform of drive singal; Circularity during size and the deposition of micro-molten drop can be obtained by image procossing, and micro-molten drop injection scheme picture when can be obtained out of phase difference by the phase place changing stroboscopic light source 2, thus micro-molten drop jet velocity can be obtained, speed, the size that can be sprayed micro-molten drop when waveform parameter that TT&C system changes drive singal regulates deposition by the molten drop that declines as required is compared with preset value, and circularity index when monitoring micro-molten drop deposition.The present invention is by the real-time detection of the procedure parameter in course of injection and regulation and control, and avoiding manually debugging drive waveforms wastes time and energy and the low shortcoming of accuracy, realizes the controllable precise that micro-molten drop prints deposition.
Accompanying drawing explanation
Fig. 1 is the principle schematic of the measure and control device of the molten drop course of injection that declines as required based on image procossing described in detailed description of the invention one.
Fig. 2 is in detailed description of the invention two, and nozzle 9c sprays the principle schematic containing satellite droplet in the micro-molten drop 10 of 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: composition graphs 1 illustrates present embodiment, the measure and control device of the molten drop course of injection that declines as required based on image procossing described in present embodiment, described device comprises filming apparatus 1, stroboscopic light source 2, droplet ejection signal control module 3, image variants module 4, stroboscopic light source drive singal generation module 5, piezoelectric ceramic drive signal generation module 6, piezoelectric ceramic drive signal amplifies power supply 11 and stroboscopic light source drive singal amplifies power supply 12;
Filming apparatus 1 and stroboscopic light source 2 are placed on the nozzle 9c same level height of micro-molten drop injection apparatus 9 with metal, the micro-molten drop of metal that filming apparatus 1 takes nozzle 9c injection is controlled by droplet ejection signal control module 3, bias light when stroboscopic light source 2 is for taking, the image that filming apparatus 1 is taken inputs to image variants module 4, signal after image variants module 4 output processing, and the signal after described process is inputed to droplet ejection signal control module 3;
Droplet ejection signal control module 3 controls piezoelectric ceramic drive signal generation module 6 according to the signal after process and stroboscopic light source drive singal generation module 5 exports piezoelectric ceramic drive signal and stroboscopic light source drive singal respectively, described piezoelectric ceramic drive signal and stroboscopic light source drive singal input to piezoelectric ceramic drive signal respectively and amplify power supply 11 and stroboscopic light source drive singal amplification power supply 12, the amplifying signal that piezoelectric ceramic drive signal amplification power supply 11 exports inputs to the piezoelectric ceramic transducer 9a of the micro-molten drop injection apparatus 9 of metal, the amplifying signal that stroboscopic light source drive singal amplification power supply 12 exports inputs to the stroboscopic light source of the micro-molten drop injection apparatus 9 of metal.
In present embodiment, described filming apparatus 1 is CCD or CMOS camera, and stroboscopic light source 2 is LED stroboscopic light source, is made up of LED array.
Filming apparatus 1 is placed on metal on micro-molten drop injection apparatus nozzle 9c same level height, filming apparatus 1 camera lens is just to stroboscopic light source 2, such stroboscopic light source 2 as a setting light source uses, stroboscopic light source 2 is made up of LED array, to guarantee to cover enough large region, use for IMAQ, when the micro-molten drop 10 of metal passes through between filming apparatus 1 and LED stroboscopic light source 2, micro-droplet photos that background is light source can be obtained.
Described device comprises motlten metal retracting device 7, and described motlten metal retracting device 7 is arranged on the below of described nozzle 9c.
Before carrying out micro-molten drop 10 injection of metal, motlten metal retracting device 7 is placed on the below of nozzle 9c, to ensure that the micro-molten drop of metal ejected can not deposit to the printing deposition that deposition substrate 8 makes the mistake.
The piezoelectric ceramic drive signal of present embodiment adopts the virtual instrument-droplet ejection signal control module 3 based on computer and the programming of AD/DA card to control to produce trapezoidal wave drive singal, the waveform of drive singal and the parameter such as frequency, amplitude thereof can be carried out adjustable arbitrarily for the melt of different physical property in droplet ejection signal control module 3, and signal amplifies power supply 11 through piezoelectric ceramic drive signal and amplifies rear drive piezoelectric ceramics drive vibrating arm generation axial vibration, droplet ejection signal control module 3 controls to produce another paths of LEDs stroboscopic light source drive singal simultaneously, one is square-wave signal, the frequency of this drive singal and Piezoelectric Ceramic synchronous waveform, the phase place of the amplitude of waveform and pulsewidth and itself and piezoelectric ceramic drive signal can regulate, and signal amplifies power supply 12 through stroboscopic light source drive singal and amplifies rear drive LED stroboscopic light source, CCD or CMOS camera is adopted to take the image of micro-molten drop course of injection, the feature of micro-molten drop is obtained through image variants module 4, droplet ejection signal control module 3 judges in course of injection, whether have the generation of satellite droplet 13 and micro-molten drop jet velocity, the information such as size, then compared with predetermined value, droplet ejection signal control module 3 changes the vibration that drive waveforms parameter drives piezoelectric ceramics automatically, thus regulate motlten metal to be extruded the course of injection forming micro-molten drop from nozzle, reach and remove satellite droplet 13, adjust the requirement of micro-molten drop jet velocity and size, and return the critical parameter information of course of injection as droplet ejection speed by the molten drop injection TT&C system that declines as required, size, droplet sphericity etc.
Detailed description of the invention two: present embodiment is the investigating method of the measure and control device of the molten drop course of injection that declines as required based on image procossing described in detailed description of the invention one, before the micro-molten drop injection apparatus 9 of metal starts to carry out droplet ejection, motlten metal retracting device is moved to immediately below nozzle 9c; Metal material to be printed is heated to design temperature and after insulation, starts following method in the micro-molten drop injection apparatus 9 of on-demand metal;
Described method comprises the steps:
Step one: droplet ejection signal control module 3 controls piezoelectric ceramic drive signal generation module 6 and drives piezoelectric ceramic transducer 9a to produce axial stretching vibration with the initial piezoelectric ceramic driving signal of setting; Control stroboscopic light source drive singal generation module 5 to send stroboscopic light source drive singal and drive stroboscopic light source 2, described stroboscopic light source drive singal is with to drive piezoelectric ceramic drive signal synchronous simultaneously;
Step 2: droplet ejection signal control module 3 controls filming apparatus 1 and takes image, the image of the micro-molten drop 10 of image variants module 4 pairs of metals processes in real time, droplet ejection signal control module 3 is analyzed the image after process, judge whether nozzle 9c sprays motlten metal, if, then proceed to step 4, if not, proceed to step 3;
Step 3: the parameter of the piezoelectric ceramic drive signal that droplet ejection signal control 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 takes image under stroboscopic light source 2 sends stroboscopic light source, proceed to step 2, the stroboscopic light source drive singal of described stroboscopic light source 2 is synchronous with described piezoelectric ceramic drive signal;
According to individual features, step 4: the feature of droplet ejection signal control module 3 to the image after process is extracted, judges whether the indices of the micro-molten drop 10 of metal meets and imposes a condition, if do not meet, then proceed to step 5; , impose a condition until the feature of the image of filming apparatus 1 shooting meets, proceed to step 5; If meet, then proceed to step 6;
Step 5: according to the individual features of extraction and imposing a condition of indices, changes the relevant parameter becoming the piezoelectric ceramic drive signal that piezoelectric ceramic drive signal generation module 6 sends, proceeds to step 2;
Step 6: droplet ejection signal control module 3 controls piezoelectric ceramic drive signal generation module 6 and stops sending piezoelectric ceramic drive signal, keeps stroboscopic light source drive singal generation module 5 to export stroboscopic light source drive singal, proceeds to step 7;
Step 7: remove motlten metal retracting device 7, need according to deposition, droplet ejection signal control module 3 controls piezoelectric ceramic drive signal generation module 6 and exports piezoelectric ceramic drive signal, carries out the injection of the micro-molten drop 10 of metal and prints deposition.
In step 5: according to the individual features of extraction and imposing a condition of indices, change the relevant parameter becoming the piezoelectric ceramic drive signal that piezoelectric ceramic drive signal generation module 6 sends and comprise:
As shown in Figure 2, when the image after process produces satellite droplet 13, the relevant parameter of the piezoelectric ceramic drive signal that droplet ejection signal control module 3 is sent by change piezoelectric ceramic drive signal generation module 6 reduces the tail length of the micro-molten drop 10 of metal, thus removes satellite droplet 13;
When the diameter dimension of the micro-molten drop 10 of metal in the image after process is not within setting size, the relevant parameter of the piezoelectric ceramic drive signal that droplet ejection signal control module 3 is sent by change piezoelectric ceramic drive signal generation module 6 regulates the diameter dimension of the micro-molten drop 10 of metal, meets setting size;
When the jet velocity of the micro-molten drop 10 of metal in the image after process is not in setting value, the parameter of the piezoelectric ceramic drive signal that droplet ejection signal control 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.
In described step 2: the image of image variants module to the micro-molten drop of metal 10 carries out process in real time and comprise: the image of the micro-molten drop 10 of image variants module 4 pairs of metals carries out binaryzation, filtering, contours extract and barycenter extraction process.
Extract feature to after image procossing in present embodiment, and calculate micro-molten drop course of injection and whether produce containing satellite droplet 13, and calculate the size of micro-molten drop; By changing the phase place driving stroboscopic light source drive singal and piezoelectric ceramic drive signal, obtaining the location drawing picture of micro-molten drop after phase difference, thus calculating the jet velocity of micro-molten drop;
In present embodiment, by the position of filming apparatus 1 as deposition position place plane when needing, can Real-Time Monitoring deposition time the speed of micro-molten drop, size and circularity index.
Image after the micro-molten drop 10 of metal sprays is after image processing module process, if produced as Fig. 2 satellite droplet 13, micro-molten drop spray processor system regulates the motlten metal volume of jetting nozzle by the parameter changing piezoelectric ceramic transducer drive waveforms signal, reduce the tail length of the micro-molten drop 10 of metal, thus remove satellite droplet 13.
Filming apparatus 1 and stroboscopic light source 2 are placed on on deposition substrate 8 same level height, gather the micro-molten drop 10 of metal at the image depositing to substrate moment, the circularity of the micro-molten drop 10 of metal when depositing can be calculated after image processing module process, and provide deviation from circular from real time, to control the pattern of microelectronics Packaging salient point.
Embodiment:
Meet micro-molten drop course of injection that deposition requires for obtaining stable, the mechanical oscillation process that the piezoelectric ceramic transducer 9a under drive waveforms signal function produces is most important.The present invention adopts trapezoidal wave as piezoelectric ceramic transducer drive signal waveform, as Fig. 3.Drive trapezoidal wave to be divided into three parts by driving effect: the Ts stage is that piezoelectric ceramic transducer is out of shape the drive oscillator release stage under signal function, this stage is that micro-molten drop was forced to from the nozzle ejection stage, and amplitude A and the Ts time length of waveform affect jet velocity; Tb is that waveform signal reaches amplitude and keeps static, and thus oscillator also remains on thereupon and stretches out the static of certain hour, and 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 breaks to form the micro-molten drop 10 of metal from the liquid stream of ejection, and this stage can on the generation affecting satellite droplet 13.
When droplet ejection signal control module 3 detects without micro-molten drop generation, automatically progressively regulate the amplitude increasing piezoelectric ceramic transducer drive signal waveform and reduce Ts value, until motlten metal sprays from nozzle 9c.When detecting that the jet velocity of micro-molten drop 10 is less than setting range, automatically progressively regulate the amplitude increasing piezoelectric ceramic transducer drive signal waveform and reduce Ts value, when detecting that the jet velocity of micro-molten drop 10 reaches in setting range, automatically progressively regulating the amplitude reducing piezoelectric ceramic transducer drive signal waveform and increasing Ts value; When detecting that the diameter of micro-molten drop 10 is less than setting range, automatically progressively regulating and increasing Tb value, when detecting that the diameter of micro-molten drop 10 is greater than setting range, automatically progressively regulating and reducing Tb value; When detect have satellite droplet 13 to produce with the generation of micro-molten drop 10 time, automatically progressively regulate and reduce Tb value, simultaneously reduction Tx value.
What stroboscopic light source drive singal adopted is square wave, as shown in Figure 4.
In sum; be only the present invention's preferably detailed description of the invention; but the present invention is not limited to above-mentioned protection domain; such as piezoelectric ceramic transducer drive signal waveform is trapezoidal wave; also waveform and the combination thereof such as triangular wave, sine wave, index shape ripple can be used; change by changing waveform rise and fall controls micro-molten drop course of injection; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses, the simple change of the technical scheme that can obtain apparently or equivalence are replaced and are all fallen within the scope of protection of the present invention.
Claims (7)
1. based on the measure and control device of the molten drop course of injection that declines as required of image procossing, it is characterized in that, described device comprises filming apparatus (1), stroboscopic light source (2), droplet ejection signal control module (3), image variants module (4), stroboscopic light source drive singal generation module (5), piezoelectric ceramic drive signal generation module (6), piezoelectric ceramic drive signal amplifies power supply (11) and stroboscopic light source drive singal amplifies power supply (12);
Filming apparatus (1) and stroboscopic light source (2) are placed on nozzle (9c) the same level height of micro-molten drop injection apparatus (9) with metal, by the micro-molten drop of metal that droplet ejection signal control module (3) control filming apparatus (1) shooting nozzle (9c) is sprayed, bias light when stroboscopic light source (2) is for taking, the image that filming apparatus (1) is taken inputs to image variants module (4), signal after image variants module (4) output processing, and the signal after described process is inputed to droplet ejection signal control module (3),
Droplet ejection signal control module (3) controls piezoelectric ceramic drive signal generation module (6) according to the signal after process and stroboscopic light source drive singal generation module (5) exports piezoelectric ceramic drive signal and stroboscopic light source drive singal respectively, described piezoelectric ceramic drive signal and stroboscopic light source drive singal input to piezoelectric ceramic drive signal respectively and amplify power supply (11) and stroboscopic light source drive singal amplification power supply (12), the amplifying signal that piezoelectric ceramic drive signal amplification power supply (11) exports inputs to the piezoelectric ceramic transducer (9a) of the micro-molten drop injection apparatus (9) of metal, the amplifying signal that stroboscopic light source drive singal amplification power supply (12) exports inputs to the stroboscopic light source of the micro-molten drop injection apparatus (9) of metal.
2. the measure and control device of the molten drop course of injection that declines as required based on image procossing 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 procossing according to claim 1, it 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 procossing 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 procossing according to claim 4, it is characterized in that, described method comprises the steps:
Step one: droplet ejection signal control module (3) controls piezoelectric ceramic drive signal generation module (6) and drives piezoelectric ceramic transducer (9a) to produce axial stretching vibration with the initial piezoelectric ceramic driving signal set; Control stroboscopic light source drive singal generation module (5) to send stroboscopic light source drive singal and drive stroboscopic light source (2), described stroboscopic light source drive singal is with to drive piezoelectric ceramic drive signal synchronous simultaneously;
Step 2: droplet ejection signal control module (3) controls filming apparatus (1) shooting image, the image of image variants module (4) to the micro-molten drop of metal (10) processes in real time, droplet ejection signal control module (3) is analyzed the image after process, judge whether nozzle (9c) sprays motlten metal, if, then proceed to step 4, if not, proceed to step 3;
Step 3: the parameter of the piezoelectric ceramic drive signal that droplet ejection signal control 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) takes image under stroboscopic light source (2) sends stroboscopic light source, proceed to step 2, the stroboscopic light source drive singal of described stroboscopic light source (2) is synchronous with described piezoelectric ceramic drive signal;
According to individual features, step 4: the feature of droplet ejection signal control module (3) to the image after process is extracted, judges whether the indices of the micro-molten drop of metal (10) meets and imposes a condition, if do not meet, then proceed to step 5; , impose a condition until the feature of image that filming apparatus (1) is taken meets, proceed to step 5; If meet, then proceed to step 6;
Step 5: according to the individual features of extraction and imposing a condition of indices, changes the relevant parameter becoming the piezoelectric ceramic drive signal that piezoelectric ceramic drive signal generation module (6) sends, proceeds to step 2;
Step 6: droplet ejection signal control module (3) controls piezoelectric ceramic drive signal generation module (6) and stops sending piezoelectric ceramic drive signal, keep stroboscopic light source drive singal generation module (5) to export stroboscopic light source drive singal, proceed to step 7;
Step 7: remove motlten metal retracting device (7), need according to deposition, droplet ejection signal control module (3) controls piezoelectric ceramic drive signal generation module (6) and exports 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 procossing according to claim 5, it is characterized in that, in step 5: according to the individual features of extraction and imposing a condition of indices, change the relevant parameter becoming the piezoelectric ceramic drive signal that piezoelectric ceramic drive signal generation module (6) sends and comprise:
When the image after process produces satellite droplet (13), the relevant parameter of the piezoelectric ceramic drive signal that droplet ejection signal control 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), thus removes satellite droplet;
When the diameter dimension of the micro-molten drop of metal (10) in the image after process is not within setting size, the relevant parameter of the piezoelectric ceramic drive signal that droplet ejection signal control 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 setting size;
When the jet velocity of the micro-molten drop of metal (10) in the image after process is not in setting value, the parameter of the piezoelectric ceramic drive signal that droplet ejection signal control 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 procossing according to claim 5, it is characterized in that, in described step 2: the image of image variants module to the micro-molten drop of metal (10) carries out process in real time and comprise: the image of image variants module (4) to the micro-molten drop of metal (10) carries out binaryzation, filtering, contours extract and barycenter extraction process.
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| CN113447518A (en) * | 2021-07-06 | 2021-09-28 | 西北工业大学 | Device for simulating fusion of molten droplets and solidified droplets in microgravity environment |
| CN113500214A (en) * | 2021-07-06 | 2021-10-15 | 西北工业大学 | Real-time capturing system for simulating metal droplet chasing fusion process under microgravity |
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| CN104914106A (en) * | 2014-03-11 | 2015-09-16 | 由田新技股份有限公司 | Defect detection method and defect detection device |
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| 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 |
| CN113447518A (en) * | 2021-07-06 | 2021-09-28 | 西北工业大学 | Device for simulating fusion of molten droplets and solidified droplets in microgravity environment |
| CN113500214A (en) * | 2021-07-06 | 2021-10-15 | 西北工业大学 | Real-time capturing system for simulating metal droplet chasing fusion process under microgravity |
| CN113447518B (en) * | 2021-07-06 | 2022-05-03 | 西北工业大学 | Device for simulating fusion of molten droplets and solidified droplets in microgravity environment |
| 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 |
| CN114932290A (en) * | 2022-06-10 | 2022-08-23 | 浙江海洋大学 | Electric arc additive manufacturing system and method based on molten drop control characteristics |
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