Crystal bar position detection mechanism and crystal taking equipment

Abstract

The utility model relates to the technical field of crystal growth, in particular to a crystal bar position detection mechanism and crystal taking equipment. The crystal bar position detection mechanism comprises a first grating sensor and a second grating sensor; a first light curtain emitted by the first grating sensor and a second light curtain emitted by the second grating sensor are mutually crossed in the vertical projection; and the first light curtain and the second light curtain are configured to be capable of being at least partially shielded by the equal-diameter section of the crystal bar to be detected. The crystal bar position detection mechanism adopts two light curtains which are arranged in a crossed manner to judge the position of the crystal bar, so that the position of the crystal bar can be accurately judged; before the crystal bar is clamped or the crystal cutting action is executed, the position of the crystal bar is accurately judged through the crystal bar position detection mechanism, so that the crystal bar is conveniently and smoothly clamped and cut off, and the crystal taking and cutting efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of crystal growth technology, and in particular to a crystal rod position detection mechanism and crystal picking equipment. Background Technology

[0002] After the crystal ingot has grown in the single crystal furnace, it needs to be removed from the furnace. To automate the crystal removal process, crystal removal equipment has been developed on the market. This equipment includes a clamping mechanism and a shearing mechanism. The clamping mechanism is used to hold the crystal ingot, while the shearing mechanism is used to cut off the narrow neck section.

[0003] However, before the clamping mechanism holds the crystal rod or the shearing mechanism performs the shearing action, the position of the crystal rod is sometimes not accurately determined, which affects the efficiency of crystal picking and shearing. Utility Model Content

[0004] The purpose of this application is to provide a crystal rod position detection mechanism and a crystal picking device to solve the technical problem in the prior art that the position of the crystal rod cannot be accurately determined during crystal picking, thereby affecting the efficiency of crystal picking and shearing.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] A crystal rod position detection mechanism, comprising a first grating sensor and a second grating sensor;

[0007] The first light curtain emitted by the first grating sensor and the second light curtain emitted by the second grating sensor intersect each other in the vertical projection;

[0008] Both the first and second light curtains are configured to be at least partially blocked by the equal-diameter section of the crystal rod under test.

[0009] The crystal rod position detection mechanism provided in this application uses two intersecting light curtains to determine the position of the crystal rod, enabling precise position detection. Simultaneously, the two light curtains only need to be partially obscured by the crystal rod. The position of the center of the circle with equal diameter segments can be derived using the geometric relationship between the two intersecting light curtains and the center of the circle. This means the two light curtains do not need to completely cover the crystal rod, thus enabling position detection of large-diameter crystal rods and compensating for insufficient light curtain height. Since the light curtains emitted by the first and second grating sensors do not need to completely cover the crystal rod, their overall size is small, making them suitable for applications with limited installation space. Furthermore, using two grating sensors to detect the position of an object has advantages such as low cost and easy installation, facilitating widespread adoption. Because the crystal rod position detection mechanism accurately determines the position of the crystal rod before clamping or cutting it, it facilitates smooth clamping and cutting of the crystal rod, improving the efficiency of crystal picking and cutting.

[0010] In some embodiments, the angle between the first light curtain and the second light curtain is between 60° and 120°;

[0011] And / or, the first grating sensor and the second grating sensor are arranged vertically at intervals or both are arranged on the same horizontal plane.

[0012] In embodiments where the first and second grating sensors are positioned on the same horizontal plane, because the crystal rod is cylindrical and has a smooth, reflective surface, during detection, the light beam illuminating the crystal rod from one grating sensor may be refracted onto the receiving part of the other grating sensor, leading to inaccurate detection data. Therefore, embodiments where the first and second grating sensors are vertically spaced apart are preferred to avoid mutual interference between the gratings and improve detection accuracy.

[0013] In some embodiments, the first grating sensor and the second grating sensor are vertically spaced at least 40 mm apart. This distance ensures that the gratings do not interfere with each other.

[0014] In some embodiments, the first light curtain and the second light curtain are configured to be blocked by a blocking length of at least 50 mm, wherein the blocking length is the vertical distance between the outermost beam and the innermost beam in the beam blocked by the equal diameter section.

[0015] The longer the blocking length, the more light beams are blocked by the crystal rod. Consequently, the receiving part of the grating sensor receives more light signals, and the more accurate the detection results are.

[0016] In some embodiments, the crystal rod position detection mechanism further includes a third grating sensor, which is disposed below the first grating sensor and the second grating sensor;

[0017] The first and second light curtains are configured to be offset from the narrow neck section at the top of the crystal rod;

[0018] The vertical projection of the narrow neck segment is located within the vertical projection of the third light curtain emitted by the third grating sensor.

[0019] The first and second grating sensors work together to obtain the horizontal coordinates of the crystal rod's axis. Using these coordinates, the clamping mechanism of the crystal-retrieving device can successfully grasp the crystal rod. The crystal rod is then controlled to fall vertically until the third grating sensor detects the position of the narrow neck segment. At this point, the seed crystal segment is within a predetermined range, providing precise positional information for subsequent crystal shearing operations.

[0020] In some embodiments, the vertical distance between the first grating sensor and the third grating sensor, as well as the vertical distance between the second grating sensor and the third grating sensor, is matched with the falling distance of the crystal rod so that the third light curtain can be blocked by the narrow neck section.

[0021] In some embodiments, the vertical distance between the first grating sensor and the third grating sensor is less than or equal to 290 mm;

[0022] And / or, the vertical distance between the second grating sensor and the third grating sensor is less than or equal to 290 mm.

[0023] When the first and second grating sensors are positioned on the same horizontal plane, the vertical distance between the first and third grating sensors is equal to and less than or equal to 290 mm. When the first and second grating sensors are vertically spaced apart, the vertical distance between the upper grating sensor and the third grating sensor is less than or equal to 290 mm. This dimension is primarily to match the drop distance of the crystal ingot, ensuring that the third light curtain emitted by the third grating sensor can be blocked by the narrow neck section.

[0024] In some embodiments, the crystal rod position detection mechanism further includes a heat dissipation structure for dissipating heat from one or more of the first grating sensor, the second grating sensor, and the third grating sensor.

[0025] Because the surface temperature of the crystal rod is relatively high, the heat radiated from the crystal rod to the grating sensor can cause the grating sensor to malfunction. Based on this, some embodiments are provided with a heat dissipation structure for heat dissipation of the grating sensor. The heat dissipation structure can dissipate the heat radiated from the crystal rod to the grating sensor in a timely manner, so as to avoid damage to the grating sensor under the thermal radiation of the crystal rod.

[0026] In some embodiments, the crystal rod position detection mechanism further includes a mounting frame on which the first grating sensor, the second grating sensor, and the third grating sensor are all mounted.

[0027] The first, second, and third grating sensors are integrated on the mounting bracket, which makes the crystal rod position detection mechanism more integrated and facilitates the disassembly, assembly, and movement of the entire mechanism.

[0028] In some embodiments, the first grating sensor and the second grating sensor are through-beam grating sensors or diffuse reflection grating sensors.

[0029] In a through-beam grating sensor, the transmitter and receiver are structurally separate and their optical axes are positioned opposite each other; in a diffuse reflection grating sensor, the transmitter and receiver are integrated into one unit. Both types of grating sensors can detect the position of a crystal rod.

[0030] A crystal-removing device includes a frame, a clamping mechanism, a crystal-shearing mechanism, and a crystal rod position detection mechanism of any one of the above, wherein:

[0031] The clamping mechanism is used to clamp the crystal rod, and the crystal shearing mechanism is used to cut off the thin neck section at the top of the crystal rod.

[0032] Both the clamping mechanism and the crystal shearing mechanism are mounted on the frame;

[0033] The crystal rod position detection mechanism is mounted on the frame, clamping mechanism, or crystal shearing mechanism.

[0034] The crystal picking equipment provided in this application is equipped with a crystal rod position detection mechanism. Before the clamping mechanism clamps the crystal rod or the shearing mechanism performs the shearing action, the crystal rod position detection mechanism accurately determines the position of the crystal rod, thereby facilitating the adjustment of the relative position between the frame and the crystal rod, so as to smoothly clamp the crystal rod and shear it, thus improving the efficiency of crystal picking and shearing. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the crystal rod before it is cut.

[0037] Figure 2 A three-dimensional structural schematic diagram of the crystal rod position detection mechanism provided in the embodiments of this application;

[0038] Figure 3 A top-view schematic diagram of the first grating sensor and the second grating sensor relative to the crystal rod in the crystal rod position detection mechanism provided in the embodiments of this application;

[0039] Figure 4 A schematic diagram of two chords formed on the crystal rod by the first grating sensor and the second grating sensor in the crystal rod position detection mechanism provided in the embodiments of this application;

[0040] Figure 5 A top view of the crystal rod position detection mechanism provided in an embodiment of this application;

[0041] Figure 6 A top-view schematic diagram of the positions of the first grating sensor, the second grating sensor, and the third grating sensor relative to the crystal rod in the crystal rod position detection mechanism provided in the embodiments of this application;

[0042] Figure 7 A schematic diagram showing the frontal positions of the first grating sensor, the second grating sensor, and the third grating sensor in the crystal rod position detection mechanism provided in the embodiments of this application relative to the crystal rod;

[0043] Figure 8 This is a front view of the crystal rod position detection mechanism provided in an embodiment of this application.

[0044] Figure 9 This is a three-dimensional structural schematic diagram of the crystal extraction device provided in the embodiments of this application.

[0045] icon:

[0046] 100 - Crystal rod; 110 - Seed crystal segment; 120 - Neck segment; 130 - Shoulder segment; 140 - Equal diameter segment;

[0047] 200 - Crystal rod position detection mechanism; 210 - First grating sensor; 211 - First transmitter; 212 - First receiver; 213 - First light curtain; 220 - Second grating sensor; 221 - Second transmitter; 222 - Second receiver; 223 - Second light curtain; 230 - Third grating sensor; 231 - Third transmitter; 232 - Third receiver; 233 - Third light curtain; 240 - Mounting bracket; 241 - First mounting part; 242 - Second mounting part;

[0048] 300-rack;

[0049] 400 - Clamping mechanism;

[0050] 500-Crystal shearing mechanism. Detailed Implementation

[0051] The technical solutions of this application will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0052] It should be noted that in the description of this application, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0053] It should be noted that, in the description of this application, the terms "connection" and "installation" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or a connection through an intermediate medium; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0054] Figure 1 This is a schematic diagram of the crystal rod before it is cut, referencing... Figure 1 The growth process of the crystal rod includes the following steps: 1. Inserting a seed crystal into the surface of the melt for fusion; 2. Necking stage: pulling out a necking section 120 from the seed crystal section 110; 3. Shoulder formation and reduction stage: expanding the crystal diameter from the diameter of the necking section 120 to the target diameter, forming a conical shouldering section 130; 4. Constant diameter stage: after shoulder reduction, the crystal reaches the target diameter, and the constant diameter growth program is started, forming a constant diameter section 140; 5. Finishing stage: when the crystal grows to the target length, the finishing program begins, the crystal diameter gradually decreases, and finally the crystal tail is broken off, thus ending the growth of the crystal rod in the single crystal furnace. The crystal rod growth process is existing technology and will not be described in detail here.

[0055] After the crystal rod has grown in the single crystal furnace, it needs to be removed from the furnace. Currently available crystal removal equipment includes a clamping mechanism and a shearing mechanism. The clamping mechanism is used to hold the crystal rod 100; the shearing mechanism is used to cut off the narrow neck section 120 (i.e., the connection between the upper end of the crystal rod and the seed crystal), separating the crystal rod from the seed crystal section 110.

[0056] However, current crystal removal equipment on the market does not have the function of detecting the position of the crystal rod, which makes it impossible to accurately determine the position of the crystal rod during crystal removal, thus affecting the efficiency of crystal removal and shearing.

[0057] Based on this, one embodiment of this application provides a crystal rod position detection mechanism 200, referring to... Figure 2 and Figure 3 The crystal rod position detection mechanism 200 includes a first grating sensor 210 and a second grating sensor 220;

[0058] The first light curtain 213 emitted by the first grating sensor 210 and the second light curtain 223 emitted by the second grating sensor 220 intersect each other in the vertical projection;

[0059] Both the first light curtain 213 and the second light curtain 223 are configured to be at least partially blocked by the equal diameter section 140 of the crystal rod 100 to be tested.

[0060] It should be noted that the grating sensor includes a transmitter and a receiver. The transmitter emits a series of parallel beams arranged in a tiling pattern to form a light curtain; the receiver receives the optical signals from the beams that make up the light curtain. The receiver will exhibit different receiving states depending on whether there are obstacles or not within the light curtain. Therefore, by analyzing the receiving state, the location information of the obstacles can be determined.

[0061] Combination Figure 4 The detection principle of the crystal rod position detection mechanism 200 provided in this application is as follows: After the first light curtain 213 emitted by the first grating sensor 210 and the second light curtain 223 emitted by the second grating sensor 220 cut into the equal diameter section 140 of the crystal rod 100, both the first light curtain 213 and the second light curtain 223 are blocked by the equal diameter section 140, and the blocking length is the chord length; by using the lengths L1 / L2 of the two chords and the included angle α between them, the position coordinates of the center O of the equal diameter section 140 can be calculated using geometric relationships, thereby achieving the purpose of determining the position of the crystal rod 100.

[0062] As described above, the crystal rod position detection mechanism 200 provided in this application uses two intersecting light curtains to determine the position of the crystal rod 100, enabling accurate determination of the crystal rod 100's position. Simultaneously, the two light curtains only need to be partially obscured by the crystal rod 100. The position of the center O of the equal-diameter segment 140 can be derived using the geometric relationship between the two intersecting light curtains and the center O. That is, the two light curtains do not need to completely cover the crystal rod 100, thus enabling position detection of large-diameter crystal rods 100 and compensating for the height of the light curtains (e.g., ...). Figure 3 As shown, the light curtain height refers to the insufficient vertical distance H between the first and last beams of light on the light curtain. Since the light curtains emitted by the first grating sensor 210 and the second grating sensor 220 do not need to completely cover the crystal rod 100, their overall size is small, making them suitable for applications with limited installation space. Furthermore, using two grating sensors to detect the position of an object offers advantages such as low cost and easy installation, facilitating widespread adoption.

[0063] Because the crystal rod position detection mechanism 200 accurately determines the position of the crystal rod 100 before clamping the crystal rod 100 or before performing the crystal cutting action, it is easier to clamp the crystal rod 100 and cut the crystal rod 100, thereby improving the efficiency of crystal picking and cutting.

[0064] It should be noted that the crystal rod position detection mechanism 200 provided in this application is not limited to detecting the position of the crystal rod. The mechanism can be used to detect any cylindrical object or an object with a cylindrical segment (i.e., a constant diameter segment 140).

[0065] Optionally, the first grating sensor 210 and the second grating sensor 220 are either through-beam grating sensors or diffuse reflection grating sensors.

[0066] In this embodiment, both the first grating sensor 210 and the second grating sensor 220 are through-beam grating sensors. The emitting and receiving parts of the through-beam grating sensor are structurally separated and their optical axes are placed opposite each other. The light curtain emitted by the emitting part directly enters the receiving part. When there are no obstacles in the light curtain, the receiving part can receive the light signals of all beams. When there are obstacles in the light curtain, some or all of the beams are blocked, and in this case, the receiving part cannot receive the light signals of the blocked beams. Figure 3 As shown, the first grating sensor 210 includes a first transmitting part 211 and a first receiving part 212 arranged opposite to each other, and a first light curtain 213 is formed between the first transmitting part 211 and the first receiving part 212; the second grating sensor 220 includes a second transmitting part 221 and a second receiving part 222 arranged opposite to each other, and a second light curtain 223 is formed between the second transmitting part 221 and the second receiving part 222.

[0067] In some other embodiments, the first grating sensor 210 and the second grating sensor 220 are diffuse reflection grating sensors. The transmitter and receiver of the diffuse reflection grating sensor are integrated into one unit; when there are no obstacles in the light curtain, the receiver cannot receive the light signal of the beam; when there are obstacles in the light curtain, the obstacles reflect the beam emitted by the transmitter to the receiver, and at this time, the receiver receives the light signal of the reflected beam.

[0068] Optionally, the angle between the first light curtain 213 and the second light curtain 223 is between 60° and 120°.

[0069] Reference Figure 4 In some embodiments, the included angle between the first light curtain 213 and the second light curtain 223 (i.e. Figure 4 The included angle α between the two chords is between 60° and 120°. For example, the included angle α between the first light curtain 213 and the second light curtain 223 is 60°, 76°, 80°, 90°, 102°, or 120°. To facilitate the calculation of the position coordinates of the center O of the equal diameter segment 140 using the chord lengths L1 / L2 and the included angle α, the included angle α is preferably an integer. In this embodiment, the included angle α between the first light curtain 213 and the second light curtain 223 is set to 60°.

[0070] Optionally, the first grating sensor 210 and the second grating sensor 220 are arranged vertically at intervals or both are arranged on the same horizontal plane.

[0071] Optionally, the angle between the first light curtain 213 and the second light curtain 223 is between 60° and 120°, and the first grating sensor 210 and the second grating sensor 220 are arranged vertically at intervals or are arranged on the same horizontal plane.

[0072] Reference Figure 4 In some embodiments, the first light curtain 213 and the second light curtain 223 are configured such that the blocking length B, which can be blocked by the equal-diameter section 140, is at least 50 mm. The blocking length is the vertical distance between the outermost and innermost beams of the light beams blocked by the equal-diameter section 140. It is understood that the larger the blocking length B, the more light beams are blocked by the crystal ingot 100, and correspondingly, the more light signals are received by the receiving unit of the grating sensor, resulting in more accurate detection results.

[0073] Reference Figures 5 to 7 The crystal rod position detection mechanism 200 also includes a third grating sensor 230, which is disposed below the first grating sensor 210 and the second grating sensor 220;

[0074] The first light curtain 213 and the second light curtain 223 are configured to be offset from the narrow neck section 120 at the upper end of the crystal rod 100;

[0075] The vertical projection of the narrow neck segment 120 is located within the vertical projection of the third light curtain 233 emitted by the third grating sensor 230.

[0076] Reference Figure 6 and Figure 7 The first light curtain 213 and the second light curtain 223 are offset from the narrow neck section 120 (e.g. Figure 6 (As shown), therefore, the crystal rod 100 is formed by... Figure 7 During the process of the light curtain falling vertically from the solid line position to the dotted line position, the first light curtain 213 and the second light curtain 223 will not be blocked by the narrow neck section 120, while the third light curtain 233 will be blocked by the narrow neck section 120.

[0077] The working principle of the above-mentioned crystal rod position detection mechanism 200 is as follows: After the first grating sensor 210 and the second grating sensor 220 determine the horizontal position coordinates of the axis of the equal diameter section 140 (that is, the horizontal position coordinates of the axis of the entire crystal rod 100), the crystal rod 100 is controlled to fall vertically. During the vertical fall of the crystal rod 100, when the first grating sensor 210 and the second grating sensor 220 do not detect any obstacles (that is, the first light curtain 213 and the second light curtain 223 are not blocked by the equal diameter section 140), and the third grating sensor 230 detects an obstacle (that is, the third light curtain 233 is blocked by the narrow neck section 120), the crystal rod stops falling. At this time, the seed crystal section 110 is just within the predetermined range and begins to wait for the next step of crystal shearing.

[0078] As described above, the first grating sensor 210 and the second grating sensor 220 work together to obtain the horizontal position coordinates of the crystal rod 100's axis. At this time, the clamping mechanism of the crystal removal device can successfully clamp the crystal rod 100 using these horizontal position coordinates. Then, the crystal rod 100 is controlled to fall vertically until the third grating sensor 230 detects the position information of the narrow neck section 120. At this point, the seed crystal section 110 is exactly within the predetermined range, providing precise position information for the subsequent crystal shearing operation.

[0079] Optionally, the third grating sensor 230 is a through-beam grating sensor or a diffuse reflection grating sensor. In this embodiment, the third grating sensor 230 is a through-beam grating sensor; the third grating sensor 230 includes a third transmitting part 231 and a third receiving part 232 disposed opposite to each other, and a third light curtain 233 is formed between the third transmitting part 231 and the third receiving part 232.

[0080] Reference Figure 7 In some embodiments, the first grating sensor 210 and the second grating sensor 220 are arranged vertically at intervals, and in this case, the first light curtain 213 and the second light curtain 223 are arranged vertically at intervals.

[0081] Reference Figure 8 In some other embodiments, the first grating sensor 210 and the second grating sensor 220 are disposed on the same horizontal plane, in which case the first light curtain 213 and the second light curtain 223 overlap.

[0082] In the embodiment where the first grating sensor 210 and the second grating sensor 220 are arranged on the same horizontal plane, since the crystal rod 100 is a cylindrical structure with a smooth and reflective surface, during the detection process, the light beam illuminating the crystal rod 100 from one grating sensor may be refracted to the receiving part of the other grating sensor, leading to inaccurate detection data. Therefore, it is preferable to use an embodiment where the first grating sensor 210 and the second grating sensor 220 are arranged vertically at intervals to avoid mutual interference between the gratings and improve detection accuracy.

[0083] Based on the above structure, the vertical spacing between the first grating sensor 210 and the second grating sensor 220 is at least 40mm, which ensures that the gratings will not interfere with each other.

[0084] Furthermore, the vertical distance between the first grating sensor 210 and the third grating sensor 230, and the vertical distance between the second grating sensor 220 and the third grating sensor 230, are matched with the falling distance of the crystal rod 100. For example... Figure 7As shown, a stop position is preset on the narrow neck section 120 of the crystal rod 100. When the third grating sensor 230 is blocked by the stop position, the crystal rod 100 stops falling. The vertical distance I2 between the second grating sensor 220 and the third grating sensor 230 is equal to the falling distance I of the crystal rod 100 minus the vertical distance I1 between the second grating sensor 220 and the stop position of the crystal rod 100 before falling.

[0085] Optionally, the vertical distance between the first grating sensor 210 and the third grating sensor 230 is less than or equal to 290 mm;

[0086] And / or, the vertical distance between the second grating sensor 220 and the third grating sensor 230 is less than or equal to 290 mm.

[0087] When the first grating sensor 210 and the second grating sensor 220 are positioned on the same horizontal plane, the vertical distance between the first grating sensor 210 and the third grating sensor 230 is equal to and less than or equal to the vertical distance between the second grating sensor 220 and the third grating sensor 230, both being less than or equal to 290 mm. When the first grating sensor 210 and the second grating sensor 220 are vertically spaced apart, the vertical distance between the upper grating sensor and the third grating sensor 230 is less than or equal to 290 mm. This dimension is primarily to match the falling distance of the crystal ingot 100, ensuring that the third grating sensor 230 can be blocked by the narrow neck section 120.

[0088] It should be noted that the vertical distance between the first, second and third grating sensors 230 can be adaptively adjusted according to the axial dimension of the crystal rod 100, and is not limited to the above-mentioned dimensions.

[0089] In some embodiments, the ingot position detection mechanism 200 further includes a mounting frame 240, on which the first grating sensor 210, the second grating sensor 220, and the third grating sensor 230 are all mounted. The integrated mounting of the first grating sensor 210, the second grating sensor 220, and the third grating sensor 230 on the mounting frame 240 improves the overall integrity of the ingot position detection mechanism 200 and facilitates the disassembly, assembly, and movement of the entire mechanism.

[0090] In some embodiments, the mounting angles of the first grating sensor 210 and the second grating sensor 220 are adjustable. That is, the angle between the first light curtain 213 emitted by the first grating sensor 210 and the second light curtain 223 emitted by the second grating sensor 220 can be adjusted. This setting allows the angle between the first light curtain 213 and the second light curtain 223 to be adjusted to a preset value to match a preset calculation formula; on the other hand, it can adapt to crystal rods 100 with different outer diameters.

[0091] Based on the above structure, the first grating sensor 210 has several arc-shaped elongated holes, and / or the second grating sensor 220 has several arc-shaped elongated holes. During installation, fasteners such as bolts are passed through the arc-shaped elongated holes and screwed onto the mounting bracket 240; the arc-shaped elongated holes are provided with an adjustment range for the bolts to move, so the installation angles of the first grating sensor 210 and the second grating sensor 220 can be adjusted.

[0092] Reference Figure 8 In this embodiment, the mounting bracket 240 includes a first mounting portion 241 and a second mounting portion 242 that are separately arranged. The first transmitting portion 211, the second transmitting portion 221, and the third transmitting portion 231 are all disposed on the first mounting portion 241, and the first receiving portion 212, the second receiving portion 222, and the third receiving portion 232 are all disposed on the second mounting portion 242. Since the first mounting portion 241 and the second mounting portion 242 are separately arranged, the distance between them can be easily adjusted. In other embodiments, the mounting bracket 240 can also be a one-piece structure.

[0093] In some embodiments, the crystal rod position detection mechanism 200 further includes a heat dissipation structure for dissipating heat from one or more of the first grating sensor 210, the second grating sensor 220, and the third grating sensor 230. Since the surface temperature of the crystal rod 100 is relatively high, the heat radiated from the crystal rod 100 to the grating sensor can cause the grating sensor to malfunction. Therefore, this embodiment provides a heat dissipation structure for cooling the grating sensor, which promptly dissipates the heat radiated from the crystal rod 100 to the grating sensor, preventing damage to the grating sensor due to the thermal radiation from the crystal rod 100.

[0094] Based on the above structure, a heat dissipation structure can be configured at the grating sensor closest to the crystal ingot 100, or a heat dissipation structure can be configured at each grating sensor, or the heat dissipation range of the heat dissipation structure can cover all grating sensors.

[0095] In this embodiment, the heat dissipation structure includes a high-temperature resistant cooling fan. The exhaust surface of the cooling fan faces one or more of the grating sensors to promptly dissipate the heat radiated to the grating sensors. The number of cooling fans can be one or more. For example, a cooling fan can be provided at the location of the transmitter and receiver of each grating sensor; alternatively, only one cooling fan can be provided, and the exhaust area of ​​this fan can cover all the grating sensors.

[0096] In other embodiments, the heat dissipation structure may also be a cooling plate or a thermoelectric cooler, with the cooling end of the cooling plate or thermoelectric cooler facing one or more of the grating sensors to cool the temperature of the grating sensors in a timely manner.

[0097] Another embodiment of this application provides a crystal extraction device, referring to... Figure 9 The crystal-retrieving device includes a frame 300, a clamping mechanism 400, a crystal-shearing mechanism 500, and a crystal rod position detection mechanism 200 as described in any of the above embodiments, wherein:

[0098] The clamping mechanism 400 is used to clamp the crystal rod 100, and the crystal shearing mechanism 500 is used to shear the thin neck section 120 at the upper end of the crystal rod 100.

[0099] Both the clamping mechanism 400 and the crystal shearing mechanism 500 are mounted on the frame 300;

[0100] The crystal rod position detection mechanism 200 is mounted on the frame 300, the clamping mechanism 400, or the crystal shearing mechanism 500.

[0101] The crystal picking equipment provided in this application is equipped with a crystal rod position detection mechanism 200. Before the clamping mechanism 400 clamps the crystal rod 100 or the crystal cutting mechanism 500 performs the crystal cutting action, the crystal rod position detection mechanism 200 accurately judges the position of the crystal rod 100, thereby facilitating the adjustment of the relative position between the frame 300 and the crystal rod 100, so as to smoothly clamp the crystal rod 100 and cut the crystal rod 100, thereby improving the efficiency of crystal picking and cutting.

[0102] Continue to refer to Figure 9 In this embodiment, the crystal rod position detection mechanism 200 is mounted on the clamping mechanism 400. Specifically, the clamping mechanism 400 includes one or more pairs of clamps; when there are multiple pairs of clamps, the multiple pairs of clamps are distributed sequentially along the vertical direction, and the multiple pairs of clamps can clamp the crystal rod 100 from different positions along the axial direction; the mounting frame 240 includes a first mounting part 241 and a second mounting part 242 that are separately arranged. The first mounting part 241 is fixed to one of the clamps in the uppermost pair of clamps by screwing or welding, and the second mounting part 242 is fixed to the other clamp in the uppermost pair of clamps by screwing or welding.

[0103] In some other embodiments, the ingot position detection mechanism 200 can also be fixed to the frame 300 or the crystal shearing mechanism 500 by screwing or welding. The installation position of the ingot position detection mechanism 200 can be reasonably adjusted, and no specific limitation is made here.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A crystal rod position detection mechanism, characterized in that, The crystal bar position detection mechanism comprises a first grating sensor and a second grating sensor; The first light curtain emitted by the first grating sensor and the second light curtain emitted by the second grating sensor intersect with each other in vertical projection; The first light curtain and the second light curtain are both configured to be at least partially blocked by the constant-diameter section of the crystal bar to be detected.

2. The crystal bar position detection mechanism according to claim 1, wherein The included angle between the first light curtain and the second light curtain is between 60° and 120°; And / or, the first grating sensor and the second grating sensor are vertically spaced apart or both are arranged on the same horizontal plane.

3. The crystal bar position detecting mechanism according to claim 1, wherein The vertical spacing distance between the first grating sensor and the second grating sensor is at least 40 mm.

4. The crystal bar position detecting mechanism according to claim 1, wherein The blocking length of the first light curtain and the second light curtain configured to be blocked by the constant-diameter section is at least 50 mm, wherein the blocking length is the vertical distance between the outermost light beam and the innermost light beam of the light beams of the light curtain blocked by the constant-diameter section.

5. The crystal bar position detecting mechanism according to claim 1, wherein The crystal bar position detection mechanism further comprises a third grating sensor arranged below the first grating sensor and the second grating sensor; The first light curtain and the second light curtain are configured to be arranged away from the neck section at the upper end of the crystal bar; The vertical projection of the neck section is located within the vertical projection of the third light curtain emitted by the third grating sensor.

6. The crystal bar position detection mechanism according to claim 5, wherein The vertical distance between the first grating sensor and the third grating sensor and the vertical distance between the second grating sensor and the third grating sensor match the falling distance of the crystal bar.

7. The crystal bar position detecting mechanism according to claim 6, wherein The vertical distance between the first grating sensor and the third grating sensor is less than or equal to 290 mm; And / or, the vertical distance between the second grating sensor and the third grating sensor is less than or equal to 290 mm.

8. The crystal bar position detecting mechanism according to claim 5, wherein The crystal bar position detection mechanism further comprises a heat dissipation structure for dissipating heat from one or more of the first grating sensor, the second grating sensor, and the third grating sensor.

9. The crystal bar position detecting mechanism according to claim 5, wherein The crystal bar position detection mechanism further comprises a mounting rack, and the first grating sensor, the second grating sensor, and the third grating sensor are all mounted on the mounting rack.

10. The crystal bar position detection mechanism according to claim 1, wherein The first grating sensor and the second grating sensor are a transmission type grating sensor or a diffuse reflection type grating sensor.

11. A crystal taking apparatus characterized by comprising: The crystal bar taking device comprises a rack, a clamping mechanism, a cutting mechanism, and the crystal bar position detection mechanism according to any one of claims 1 to 10, wherein: The clamping mechanism is used for clamping the crystal bar, and the cutting mechanism is used for cutting the neck section at the upper end of the crystal bar; The clamping mechanism and the cutting mechanism are both mounted on the rack; The crystal bar position detection mechanism is mounted on the rack, the clamping mechanism, or the cutting mechanism.

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