CN110093666B - Device and method for eliminating mixed crystals at bottom of KDP crystal growth tank - Google Patents
Device and method for eliminating mixed crystals at bottom of KDP crystal growth tank Download PDFInfo
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- CN110093666B CN110093666B CN201910298804.7A CN201910298804A CN110093666B CN 110093666 B CN110093666 B CN 110093666B CN 201910298804 A CN201910298804 A CN 201910298804A CN 110093666 B CN110093666 B CN 110093666B
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- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/10—Inorganic compounds or compositions
- C30B29/14—Phosphates
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- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B7/00—Single-crystal growth from solutions using solvents which are liquid at normal temperature, e.g. aqueous solutions
Abstract
The device and the method for eliminating the mixed crystals at the bottom of the KDP crystal growing tank can identify the position of the mixed crystals through computer images under the condition that the mixed crystals are generated at the bottom of the crystal growing tank, and automatically send instructions to inform a controller to control a heating sheet below the position of the mixed crystals to generate heat, so that a local high temperature is formed in the region where the mixed crystals are positioned until the mixed crystals are completely eliminated. The invention can dissolve the mixed crystal at the bottom of the crystal growing tank under the condition of not influencing the normal growth of the crystal, and improve the success rate of KDP crystal growth.
Description
Technical Field
The invention relates to KDP crystals, in particular to a device and a method for eliminating mixed crystals at the bottom of a KDP crystal growth tank, aiming at eliminating the mixed crystals at the bottom of the growth tank on the premise of not influencing the normal growth of the KDP crystals and improving the success rate of the growth of the KDP crystals.
Background
At present, inertial confinement nuclear fusion (ICF) devices of various countries all need KDP crystals with large quantity, high quality and large caliber; the KDP crystal is used as an optical switch and a frequency doubling element, and the DKDP crystal is used as a frequency tripling element. The growth of KDP crystal mainly adopts traditional growth method and point seed crystal rapid growth method. In order to obtain a large-caliber KDP crystal element which can meet the requirements of an ICF device, the traditional growth method needs one to two years, and even the point seed crystal rapid growth method with higher growth speed needs two to three months or even half a year. In such a long growth period, the solution in the KDP crystal growth tank is in a supersaturated state, and the crystal carrier is always in a forward rotation-reverse rotation alternating state, so that mixed crystals are easily generated in the solution due to spontaneous nucleation. These mixed crystals easily adhere to the bottom of the crystal growth tank and grow as the crystals grow, so that the solute in the solution is excessively consumed, thereby affecting the growth of normal crystals. Therefore, once the mixed crystals at the bottom of the crystal growth tank are generated, the crystal growth is forced to be interrupted, thereby seriously influencing the success rate of KDP crystal growth.
Disclosure of Invention
In order to overcome the problems existing in the growth of the KDP crystal, the invention provides a device and a method for eliminating the mixed crystals at the bottom of a KDP crystal growth tank. The device and the method can eliminate the mixed crystals at the bottom of the growth groove on the premise of not influencing the normal growth of the KDP crystals, and improve the success rate of the growth of the KDP crystals.
The technical solution of the invention is as follows:
the device for eliminating the mixed crystals at the bottom of the KDP crystal growth tank comprises a crystal growing body and a crystal carrying frame positioned in the crystal growing tank, wherein the crystal carrying frame is connected with a rotating motor positioned outside the crystal growing tank through a crystal carrying frame connecting rod, an observation window is formed in the side wall of the crystal growing tank, a camera is installed outside the observation window and is in communication connection with a computer.
The method for eliminating the mixed crystals by using the eliminating device for the mixed crystals at the bottom of the KDP crystal growing tank is characterized by comprising a calibration stage before the KDP crystal grows and a mixed crystal eliminating stage in the KDP crystal growing process;
the calibration stage before the KDP crystal growth specifically comprises the following steps:
1) manufacturing a calibration component, wherein the calibration component is provided with two mutually connected planes, each plane is provided with a series of standard rings which are arranged vertically and horizontally, and the distance and the size of each standard ring are known;
2) filling pure water for preparing a growth solution in the crystal growth tank, placing the calibration component at the bottom of the crystal growth tank, and enabling the center of one surface of the calibration component to coincide with the center of the bottom of the crystal growth tank;
3) controlling a camera to take a picture of the calibration component by a computer, and then controlling the camera to horizontally rotate by M degrees by taking the center of the bottom of the crystal growth tank as a rotation center and then take a picture of the calibration component, wherein M is more than 5 and less than 30;
4) the computer inverses the three-dimensional coordinate information taking the center of the bottom of the crystal growth tank as the origin of coordinates through the calibration process of binocular stereo vision according to the photos of the two calibration components shot before and after, and stores the information in the computer;
5) taking out the calibration assembly, discharging the pure water in the crystal growth tank, and starting the growth of KDP crystals;
the method comprises the following specific steps of:
6) the computer controls the camera to take a picture of the bottom of the crystal growth groove every N minutes and stores the picture in the computer, wherein N is more than 5 and less than 60; comparing the photo data of the bottoms of the front and the rear crystal growth grooves by the computer until the photo data of the bottoms of the front and the rear crystal growth grooves are inconsistent, judging that mixed crystals are generated at the bottom of the crystal growth groove, and entering the step 7);
7) the computer calculates the position of the mixed crystal according to the three-dimensional coordinate information obtained in the step 4), and sends the code of the heating sheet corresponding to the position of the mixed crystal to the controller; after receiving the instruction sent by the computer, the controller controls the heating sheet corresponding to the mixed crystal position to heat, so that a local high temperature is formed in the region where the mixed crystal is located, and the mixed crystal is gradually dissolved;
8) in the process of dissolving the mixed crystal, the computer controls the camera to take a picture of the bottom of the crystal growth groove every N minutes and stores the picture in the computer; the computer compares the photo data of the bottoms of the front and the back crystal growth grooves until the photo data of the bottoms of the front and the back crystal growth grooves are consistent, and then the computer judges that the mixed crystals are eliminated and enters the step 9);
9) the computer sends a stop command to the controller, and the controller controls the heating piece which generates heat to stop heating and returns to the step 6).
The invention has the following technical effects:
the invention discloses a device and a method for eliminating miscellaneous crystals at the bottom of a KDP crystal growing tank, which can identify the position of the miscellaneous crystals through computer images under the condition that the miscellaneous crystals are generated at the bottom of the crystal growing tank, automatically send instructions to inform a controller to control a heating sheet below the position of the miscellaneous crystals to generate heat, and further form local high temperature in the area where the miscellaneous crystals are positioned until the miscellaneous crystals are completely eliminated. The invention can dissolve the mixed crystal at the bottom of the crystal growing tank under the condition of not influencing the normal growth of the crystal, and improve the success rate of KDP crystal growth.
Drawings
FIG. 1 is a schematic view of the apparatus and method for eliminating bottom mixed crystals of KDP crystal growing tank of the present invention;
FIG. 2 is a schematic diagram of a calibration assembly with a series of standard rings arranged in a row and column.
In the figure: 1-a crystal carrying frame; 2-KDP type crystals; 3-crystal growth grooves; 4-a crystal carrier connecting rod; 5-a rotating electrical machine; 6-a computer; 7-a controller; 8-a camera; 9-observation window; 10-heating plate.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are not intended to limit the scope of the invention.
Examples
Referring to fig. 1, it can be seen that the device for eliminating the mixed crystals at the bottom of the KDP-based crystal growth tank includes a crystal growth tank 3 and a crystal carrier 1 located inside the crystal growth tank 3, the crystal carrier 1 is connected to a rotating motor 5 located outside the crystal growth tank 3 through a crystal carrier connecting rod 4, an observation window 9 is formed in a side wall of the crystal growth tank 3, a camera 8 is installed outside the observation window 9, the camera 8 is in communication connection with a computer 6, a plurality of heating plates 10 are arranged at the bottom of the crystal growth tank 3, position information of each heating plate 10 relative to the center of the bottom of the crystal growth tank 3 is stored in the computer 6 in a coded form, the computer 6 sends an instruction to the controller 7, and the controller 7 selectively controls the heating plates 10 to generate heat.
The method for eliminating the mixed crystals by using the eliminating device for the mixed crystals at the bottom of the KDP crystal growing tank comprises a calibration stage before the growth of the KDP crystal 2 and a mixed crystal eliminating stage in the growth process of the KDP crystal 2;
the calibration stage before the growth of the KDP crystal 2 comprises the following specific steps:
1) manufacturing a calibration component 12, wherein the calibration component 12 is provided with two mutually connected planes, each plane is provided with a series of standard circular rings 11 which are arranged in a longitudinal and transverse mode, and the distance and the size of each standard circular ring 11 are known;
2) filling pure water for preparing a growth solution in the crystal growth groove 3, placing the calibration component 12 at the bottom of the crystal growth groove 3, and enabling the center of one surface of the calibration component 12 to coincide with the center of the bottom of the crystal growth groove 3;
3) the computer 6 controls the camera 8 to take a picture of the calibration component 12, then the computer 6 controls the camera 8 to horizontally rotate by M degrees by taking the center of the bottom of the crystal growth groove 3 as a rotation center and then take a picture of the calibration component 12, wherein M is more than 5 and less than 30;
4) the computer 6 inverses the three-dimensional coordinate information taking the center of the bottom of the crystal growth groove 3 as the origin of coordinates through the calibration process of binocular stereo vision according to the photos of the two calibration assemblies 12 shot before and after, and stores the information in the computer 6;
5) taking out the calibration component 12, discharging the pure water in the crystal growth tank 3, and starting the growth of the KDP crystal 2;
the method comprises the following specific steps of:
6) the computer 6 controls the camera 8 to take a picture of the bottom of the crystal growth groove 3 every N minutes and stores the picture in the computer 6, wherein N is more than 5 and less than 60; the computer 6 compares the photo data of the bottoms of the two crystal growth grooves 3 before and after are inconsistent, and then judges that the bottom of the crystal growth groove generates mixed crystals and enters the step 7);
7) the computer 6 calculates the position of the mixed crystal according to the three-dimensional coordinate information obtained in the step 4), and sends the code of the heating plate 10 corresponding to the position of the mixed crystal to the controller 7; after receiving the instruction sent by the computer 6, the controller 7 controls the heating sheet 10 corresponding to the mixed crystal position to generate heat, so that a local high temperature is formed in the region where the mixed crystal is located, and the mixed crystal is gradually dissolved;
8) in the process of dissolving the mixed crystal, the computer 6 controls the camera 8 to take a picture of the bottom of the crystal growth groove 3 every N minutes and stores the picture in the computer 6; the computer 6 compares the photo data of the bottoms of the front and the back crystal growth grooves 3 until the photo data of the bottoms of the front and the back crystal growth grooves 3 are consistent, and then the computer judges that the mixed crystals are eliminated and enters the step 9);
9) the computer 6 sends a stop instruction to the controller 7, and the controller 7 controls the heating sheet 10 which is generating heat to stop heating, and returns to step 6).
Claims (2)
1. A device for eliminating mixed crystals at the bottom of a KDP crystal growth tank comprises a crystal growth tank (3) and a crystal carrying frame (1) positioned in the crystal growth tank (3), wherein the crystal carrying frame (1) is connected with a rotating motor (5) positioned outside the crystal growth tank (3) through a crystal carrying frame connecting rod (4), an observation window (9) is formed in the side wall of the crystal growth tank (3), a camera (8) is installed on the outer side of the observation window (9), the camera (8) is in communication connection with a computer (6), the device is characterized in that a plurality of heating sheets (10) are arranged at the bottom of the crystal growth tank (3), the position information of each heating sheet (10) relative to the center of the bottom of the crystal growth tank (3) is stored in the computer (6) in an encoding mode, and the computer (6) sends instructions to a controller (7), the controller (7) selects and controls the heating of the heating sheet (10).
2. A method for removing mixed crystals by using the device for removing the mixed crystals at the bottom of the KDP crystal growing tank of claim 1, which is characterized by comprising a calibration stage before the KDP crystal (2) grows and a mixed crystal removing stage in the growing process of the KDP crystal (2);
the calibration stage before the KDP crystal (2) grows comprises the following specific steps:
1) manufacturing a calibration component (12), wherein the calibration component (12) is provided with two mutually connected planes, each plane is provided with a series of standard rings (11) which are arranged in a longitudinal and transverse mode, and the distance and the size of each standard ring (11) are known;
2) filling pure water for preparing a growth solution in the crystal growth groove (3), placing the calibration component (12) at the bottom of the crystal growth groove (3), and enabling the center of one surface of the calibration component (12) to coincide with the center of the bottom of the crystal growth groove (3);
3) the computer (6) controls the camera (8) to take a picture of the calibration component (12), then the computer (6) controls the camera (8) to horizontally rotate by M degrees by taking the center of the bottom of the crystal growth groove (3) as a rotation center and then take a picture of the calibration component (12), and 5 degrees < M <30 degrees;
4) the computer (6) inverts three-dimensional coordinate information taking the center of the bottom of the crystal growth groove (3) as a coordinate origin through the calibration process of binocular stereo vision according to the photos of the two calibration components (12) shot before and after, and stores the information in the computer (6);
5) taking out the calibration component (12), discharging the pure water in the crystal growth groove (3), and starting the growth of the KDP crystal (2);
the method comprises the following specific steps of:
6) the computer (6) controls the camera (8) to take a picture of the bottom of the crystal growth groove (3) every N minutes and stores the picture in the computer (6), wherein N is less than 60 minutes in 5 minutes; the computer (6) compares the photo data of the bottoms of the front and the rear crystal growth grooves (3) until the photo data of the bottoms of the front and the rear crystal growth grooves (3) are inconsistent, judges that the bottom of the crystal growth groove generates mixed crystals, and enters the step 7);
7) the computer (6) calculates the position of the mixed crystal according to the three-dimensional coordinate information obtained in the step 4), and sends the code of the heating sheet (10) corresponding to the position of the mixed crystal to the controller (7); after receiving the instruction sent by the computer (6), the controller (7) controls the heating sheet (10) corresponding to the mixed crystal position to generate heat, so that a local high temperature is formed in the region where the mixed crystal is located, and the mixed crystal is gradually dissolved;
8) in the process of dissolving the mixed crystal, the computer (6) controls the camera (8) to take a picture of the bottom of the crystal growth groove (3) every N minutes and stores the picture in the computer (6); the computer (6) compares the photo data of the bottoms of the front and the back crystal growth grooves (3) until the photo data of the bottoms of the front and the back crystal growth grooves (3) are consistent, and judges that the mixed crystals are eliminated and enters the step 9);
9) the computer (6) sends a stop instruction to the controller (7), and the controller (7) controls the heating piece (10) which is generating heat to stop heating and returns to the step 6).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910298804.7A CN110093666B (en) | 2019-04-15 | 2019-04-15 | Device and method for eliminating mixed crystals at bottom of KDP crystal growth tank |
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| CN201910298804.7A CN110093666B (en) | 2019-04-15 | 2019-04-15 | Device and method for eliminating mixed crystals at bottom of KDP crystal growth tank |
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| CN110093666A CN110093666A (en) | 2019-08-06 |
| CN110093666B true CN110093666B (en) | 2021-03-02 |
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| CN114381809B (en) * | 2022-02-18 | 2023-06-27 | 闽都创新实验室 | Crystal growth groove and groove bottom impurity crystal removing method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101013505A (en) * | 2007-02-05 | 2007-08-08 | 武汉大学 | Camera calibration method and calibration apparatus thereof |
| CN101319348A (en) * | 2008-06-13 | 2008-12-10 | 青岛大学 | Inverse-conical dropped bottom type crystal growth apparatus |
| CN203174218U (en) * | 2013-03-06 | 2013-09-04 | 江南大学 | Continuous filtration automatic control device in crystal cultivation process |
| CN103757687A (en) * | 2013-11-26 | 2014-04-30 | 于洪洲 | New-structure crystal growth container |
| CN108680106A (en) * | 2018-06-15 | 2018-10-19 | 中国科学院上海光学精密机械研究所 | The real-time measurement system and its measurement method of KDP crystalloid growth parameter(s)s |
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- 2019-04-15 CN CN201910298804.7A patent/CN110093666B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101013505A (en) * | 2007-02-05 | 2007-08-08 | 武汉大学 | Camera calibration method and calibration apparatus thereof |
| CN101319348A (en) * | 2008-06-13 | 2008-12-10 | 青岛大学 | Inverse-conical dropped bottom type crystal growth apparatus |
| CN203174218U (en) * | 2013-03-06 | 2013-09-04 | 江南大学 | Continuous filtration automatic control device in crystal cultivation process |
| CN103757687A (en) * | 2013-11-26 | 2014-04-30 | 于洪洲 | New-structure crystal growth container |
| CN108680106A (en) * | 2018-06-15 | 2018-10-19 | 中国科学院上海光学精密机械研究所 | The real-time measurement system and its measurement method of KDP crystalloid growth parameter(s)s |
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