CN201148460Y - Molten drop deflection distance observe and control apparatus - Google Patents
Molten drop deflection distance observe and control apparatus Download PDFInfo
- Publication number
- CN201148460Y CN201148460Y CNU2008200281679U CN200820028167U CN201148460Y CN 201148460 Y CN201148460 Y CN 201148460Y CN U2008200281679 U CNU2008200281679 U CN U2008200281679U CN 200820028167 U CN200820028167 U CN 200820028167U CN 201148460 Y CN201148460 Y CN 201148460Y
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- charging
- deflection
- electrode
- molten drop
- deflection distance
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Abstract
The utility model discloses a deflection distance measure and control device for uniform charging metal droplets, which comprises a deflection electrode, a charging electrode, a recovery tank and a charging modulation circuit, and is characterized in that the utility model also comprises a light source, an image collection card, a CCD camera, a metal droplet spraying device, an excitation source, a voltage regulation circuit, a D/A conversion circuit, an image collection and treatment module and a high-voltage DC power supply. The images collected by the CCD camera are transmitted to the image collection and treatment module. The output signal of the image collection and treatment module is converted into the analog signal by the D/A conversion circuit to control the charging modulation circuit to regulate the amplitude value of the charging pulse. The utility model takes the photos of the deflected metal droplets by the CCD camera, measures the deflection distance of the metal droplets according to the photos and changes the amplitude value of the charging voltage according to the measurement results so as to realize the controlling of the deflection distance of the charging droplet, which avoids the problems of the pollution and damage of a detection device caused by the high-temperature droplet flow, and realizes the accurate controlling of the deflection distance of the droplets.
Description
Technical field
The utility model relates to a kind of uniform charge molten drop deflection distance measuring and control device, also relates to the method for utilizing this measuring and control device observing and controlling uniform charge molten drop deflection distance.
Background technology
Uniform charge molten drop spray up n. method, use mechanical disturbance that laminar flow capillary metal jet is dispersed and be the even metal drop, the even molten drop that sprays there is the charging of selection, charge molten drop deflects by the high tension electrostatic field, thereby piles up the manufacturing that realizes product layer by layer then on substrate.The accurate deflection deposition of control minute metallic drop can provide effective means for the low-cost high-efficiency processing of minute metallic product.In the metal deposition manufacturing processed, the molten drop temperature is higher, and fair is the milligram magnitude, and charge capacity is generally skin storehouse magnitude.The subtle change of Working environment such as envrionment temperature, nozzle erosion situation, charging electric field intensity, deflecting electric field intensity will influence the deflection precision of molten drop.
With reference to Fig. 2, document " Controlling Print Height in an Ink Jet Printer; IBM j.Res.Develop.January 197721:52-55 " discloses a kind of charging ink droplet deflection distance closed-loop measuring Controlling System, this system comprises deflection electrode 2, charging electrode 3, accumulator tank 7, transmitter 9, ink droplet generation device 10 and charging modulation circuit, the charging modulation circuit charges by the ink droplet stream 8 that 3 pairs of ink droplet generation devices of charging electrode 10 produce, and deflects during high-voltage deflection electric field that charging ink droplet stream 8 produces through deflection electrodes 2.When ink droplet stream 8 passes between 9 two tablets of transmitter, transmitter 9 is subjected to the static induction effect of the electric weight on the ink droplet stream 8, produce a feeble signal, this signal is through after amplification and changing, under default deflection distance situation, ink droplet stream 8 is through transmitter 9, and the signal that sensor circuit detects compares, the adjustment of its difference is controlled the ink droplet deflection distance by the ink droplet jet pressure that changes ink droplet generation device 10, thereby realizes the control to the charged droplets deflection distance.The document utilization sensor measurement signal has been realized before charging ink droplet deposition the calibration to the ink droplet deflection distance, thus realized to ink droplet inclined to one side 8 change apart from and the measurement and the control of offset error.But in document, pointing out, this kind transmitter in use, the distance of two tablet and detected stream of liquid droplets is very near, has only 2.54mm.If adopt such transmitter closely to detect the deflection distance of molten metal drip, be subjected to the restriction of distance between transmitter and the stream of liquid droplets, be easy to cause the pollution of molten drop to testing circuit.
Summary of the invention
Closely cause polluting owing to sensor sensing plate and detected hot metal stream of liquid droplets distance in order to overcome prior art, damage the deficiency of proofing unit, the utility model provides a kind of uniform charge molten drop deflection distance measuring and control device, adopt ccd video camera to take the moment photo of deflection molten metal drip in conjunction with stroboscopic light source, machine is handled and is obtained deflection distance as calculated, compare with the deflection distance preset value again, its difference data is exported by computer, after the D/A conversion, obtain a simulating signal, adjust the molten drop charging voltage, carry out the monitoring and the control of uniform charge molten drop deflection distance.
The technical scheme that its technical problem that solves the utility model adopts: a kind of uniform charge molten drop deflection distance measuring and control device, comprise deflection electrode, charging electrode, accumulator tank and charging modulation circuit, it is characterized in that: also comprise light source, image pick-up card, ccd video camera, the molten drop jet apparatus, exciting source, voltage regulator circuit, the D/A change-over circuit, image acquisition and processing module and high-voltage DC power supply, under the molten drop jet apparatus, place a pair of charging electrode, the below of charging electrode is a pair of deflection electrode, light source is placed on the molten metal drip of deflection electrode below over against place of deposition, and ccd video camera is facing to the molten metal drip of deflection electrode below place of deposition; The sine excitation signal that exciting source produces drives the molten drop jet apparatus and produces even molten metal drip, exciting source produces TTL signal control charging modulation circuit and charging pulse is carried on the pole plate of charging electrode, high-voltage DC power supply provides deflecting voltage to deflection electrode, the image acquisition and processing module works asynchronously with light source by IMAQ card control ccd video camera, ccd video camera is passed to the image acquisition and processing module with the photo that collects, the output signal of image acquisition and processing module is converted to simulating signal through the D/A change-over circuit, the amplitude that control charging modulation circuit is regulated charging pulse.
The beneficial effects of the utility model are: because the utility model adopts ccd video camera to take the moment photo of deflection molten metal drip in conjunction with stroboscopic light source, machine is handled and is obtained deflection distance as calculated, compare with the deflection distance preset value again, its difference data is exported by computer, after the D/A conversion, obtain a simulating signal, adjust the molten drop charging voltage, carry out the monitoring and the control of uniform charge molten drop deflection distance.CCD camera lens wide-long shot slightly so can guarantee the distance that 5cm is above with the molten metal drip, has avoided the hot metal stream of liquid droplets to pollute, damage the problem of proofing unit just.Simultaneously, before evenly molten drop deposits, deflection distance to molten drop is tested, guaranteed the sedimentary precision of molten drop deflection, and by in software, setting deflection distance, utilize the deflection distance of measuring result control molten drop then, realized the accurate control of molten drop deflection distance.
Below in conjunction with drawings and Examples the utility model is elaborated.
Description of drawings
Fig. 1 is the utility model uniform charge molten drop deflection distance measuring and control device synoptic diagram.
Fig. 2 is a prior art uniform charging ink droplet deflection distance closed-loop measuring Controlling System synoptic diagram.
Among the figure, 1-light source, 2-deflection electrode, 3-charging electrode, 4-molten metal drip, 5-image pick-up card, 6-CCD pick up camera, 7-accumulator tank, 8-ink droplet stream, 9-transmitter, 10-ink droplet generation device.
Embodiment
With reference to Fig. 1, the utility model comprises light source 1, deflection electrode 2, charging electrode 3, image pick-up card 5, ccd video camera 6, accumulator tank 7 and molten drop jet apparatus, exciting source, charging modulation circuit, voltage regulator circuit, D/A change-over circuit, image acquisition and processing module and high-voltage DC power supply.Under the molten drop jet apparatus, place a pair of charging electrode 3, the below of charging electrode 3 is a pair of deflection electrodes 2, distance between deflection electrode 2 pole plates is slightly wider than the distance between charging electrode 3 pole plates, accumulator tank 7 is placed in the below of molten metal drip 4, light source 1 is placed on the molten metal drip 4 of deflection electrode 2 belows over against place of deposition, and ccd video camera 6 is facing to the molten metal drip 4 of deflection electrode 2 below place of deposition.Before carrying out molten drop deflection distance control, deposition substrate is shifted out range of deposition, accumulator tank 7 places deflection electrode 2 belows, guarantees that molten drop in the device debugging process is deposited in the accumulator tank and does not pollute board unit.Molten drop jet apparatus heating liquefaction metal also sprays.Exciting source produces the TTL signal of a sine excitation signal and a sinusoidal frequency, and the piezoelectric device of sine excitation signal in amplifying rear drive molten drop jet apparatus is to produce certain mechanical disturbance, and this mechanical disturbance disperses metal jet and is molten metal drip 4.The charging modulation circuit produces the frequency of TTL signal in conjunction with exciting source and charging voltage size that voltage regulator circuit provides produces charging pulse at interval.This charging pulse is carried on the charging electrode 3 even molten metal drip 4 is carried out the interval charging, and 4 chargings of molten metal drip are after deflect during high-voltage deflection electric field that overshoot electrode 2 produces.Molten metal drip 4 is after charging deflection, and the image acquisition and processing module works asynchronously with light source 1 by image pick-up card 5 control ccd video cameras 6, captures the moment photo of molten metal drip 4 deflections.The photo that collects is passed to the image acquisition and processing module.Image acquisition and processing module analysis photo obtains utilizing interpolation method to obtain the deflection distance of height of deposition place molten drop near deflection of droplets the height of deposition and the horizontal throw between the deflection molten drop not.Then this distance and the distance of setting are compared the difference that draws between the two.The positive negative signal of difference that obtains and difference is by the output of image acquisition and processing module.The D/A change-over circuit is converted to a mimic signal with the difference numerary signal of output, voltage regulator circuit is adjusted the size of charging voltage and then the amplitude that control charging modulation circuit is regulated charging pulse according to the positive negative signal of simulating signal and difference, reaches the purpose of regulating molten drop deflection distance.Repeat the later step of above-mentioned IMAQ, carry out the deposition of molten drop after within the limit of error that the difference of the deflection distance of molten drop and preset value is allowing again, reached the control purpose of molten drop deflection distance like this.
The deflection distance precision of molten metal drip 4 is tested and measured adjustment.Under the certain situation of deflection distance, repeatedly after the deposition, owing to the reasons such as nozzle erosion of envrionment temperature, molten drop jet apparatus can cause the change of deflection distance.Therefore before depositing once more, be necessary to carry out the detection of deflection precision.Deposition substrate is shifted out range of deposition, and accumulator tank 7 places deflection electrode 2 belows, and molten drop jet apparatus heating liquefaction metal also sprays in conjunction with outside exciting and sets up even molten metal drip 4.Charging pulse is carried on the charging electrode 3 even molten drop is flow to the between-line spacing charging, and charged molten metal drip 4 carries out deflection through the high-voltage deflection electric field that deflection electrode 2 produces.The image acquisition and processing module is captured the interval deflection moment photo of molten metal drip 4 by image pick-up card 5 control ccd video cameras 6 and light source 1.The photo that collects is passed to the image acquisition and processing module.Image acquisition and processing resume module photo obtains utilizing interpolation method to obtain depositing the deflection distance of distance molten drop near deflection molten drop the height of deposition and the horizontal throw between the deflection molten drop not.Realize the deflection distance measurement check of molten drop, then this distance has been compared the difference that draws between the two with former deflection distance.If difference has exceeded the limit of error that allows, the image acquisition and processing module will be exported the positive negative signal of this difference and difference.The D/A change-over circuit is converted to a mimic signal with the difference numerary signal of output, voltage regulator circuit is adjusted the size of charging voltage and then the amplitude that control charging modulation circuit is regulated charging pulse according to the positive negative signal of simulating signal and difference, reaches the purpose of regulating molten drop deflection distance.If difference within the limit of error that allows, then can be carried out the deflection deposition of molten drop.Check and measurement and adjustment have been realized to the deflection distance precision of charge molten drop stream.
Claims (3)
1, a kind of uniform charge molten drop deflection distance measuring and control device, comprise deflection electrode, charging electrode, accumulator tank and charging modulation circuit, it is characterized in that: also comprise light source, image pick-up card, ccd video camera, the molten drop jet apparatus, exciting source, voltage regulator circuit, the D/A change-over circuit, image acquisition and processing module and high-voltage DC power supply, under liquid droplet ejection apparatus, place a pair of charging electrode, the below of charging electrode is a pair of deflection electrode, light source is placed on the stream of liquid droplets of deflection electrode below over against place of deposition, and ccd video camera is facing to the stream of liquid droplets of deflection electrode below place of deposition; The sine excitation signal that exciting source produces drives liquid droplet ejection apparatus and produces even molten metal drip, exciting source produces TTL signal control charging electrical modulation circuit and charging pulse is carried on the pole plate of charging electrode, high-voltage DC power supply provides deflecting voltage to deflection electrode, the image acquisition and processing module works asynchronously with light source by IMAQ card control ccd video camera, ccd video camera is passed to the image acquisition and processing module with the photo that collects, the output signal of image acquisition and processing module is converted to simulating signal through the D/A change-over circuit, the amplitude that control charging modulation circuit is regulated charging pulse.
2, uniform charge molten drop deflection distance measuring and control device according to claim 1 is characterized in that: the distance between described deflection electrode pole plate is slightly wider than the distance between the charging electrode pole plate.
3, uniform charge molten drop deflection distance measuring and control device according to claim 1 is characterized in that: described accumulator tank when device debugging, be positioned at stream of liquid droplets below.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200281679U CN201148460Y (en) | 2008-01-22 | 2008-01-22 | Molten drop deflection distance observe and control apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200281679U CN201148460Y (en) | 2008-01-22 | 2008-01-22 | Molten drop deflection distance observe and control apparatus |
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| CN201148460Y true CN201148460Y (en) | 2008-11-12 |
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| CNU2008200281679U Expired - Fee Related CN201148460Y (en) | 2008-01-22 | 2008-01-22 | Molten drop deflection distance observe and control apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109702201A (en) * | 2019-02-27 | 2019-05-03 | 西北工业大学 | Horizontal-jet metal droplet flight path regulation device |
| CN110207947A (en) * | 2019-05-08 | 2019-09-06 | 南京航空航天大学 | Drop accelerator and method |
-
2008
- 2008-01-22 CN CNU2008200281679U patent/CN201148460Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109702201A (en) * | 2019-02-27 | 2019-05-03 | 西北工业大学 | Horizontal-jet metal droplet flight path regulation device |
| CN110207947A (en) * | 2019-05-08 | 2019-09-06 | 南京航空航天大学 | Drop accelerator and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081112 Termination date: 20130122 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |