A length measuring device

Abstract

This application provides a length measuring device relating to the field of photovoltaic monocrystalline silicon technology. It includes: a first end positioning component for contacting the end face of a first end of a crystal rod; a second end positioning component for contacting the end face of a second end of the crystal rod; a gap exists between the first and second end positioning components, which is a clamping gap, and the size of the clamping gap is adjustable; a driving component for adjusting the size of the clamping gap; a measuring tool disposed near the clamping gap for measuring the size of the clamping gap; and a pressure sensor disposed on the first / second end positioning components and located at one end of the clamping gap. The pressure sensor is associated with the driving component; when the pressure value detected by the pressure sensor exceeds a preset threshold, the driving component stops operating, thus preventing damage to the crystal rod due to excessive force.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic monocrystalline silicon technology, and in particular to a length measuring device. Background Technology

[0002] In photovoltaic monocrystalline silicon manufacturing, crystal rods (or simply rods, such as monocrystalline silicon rods) grown using the Czochralski (CZ) method are high-purity silicon crystals. The geometrical accuracy of the rods, especially their length accuracy, directly affects the quality of subsequent slicing processes and the final conversion efficiency of solar cells, making it a critical quality control step in the production process.

[0003] Currently, the industry generally relies on mechanical calipers for manual measurement of crystal rod length. However, this traditional method has the following drawbacks:

[0004] 1. Force control problem: During measurement, manual force is required to push the crystal rod against the fixed end. The operator adjusts based on experience. Due to the lack of precise force control, it is very easy to cause scratches or microcracks on the surface of the crystal rod due to excessive force, which will damage the material properties and reduce the yield of subsequent processing.

[0005] 2. Visual reading error: The measurement results rely on manual visual alignment of the scale. In insufficient light or under conditions of reflection on the crystal rod surface, visual errors are easily generated, resulting in large fluctuations and poor repeatability of the measurement data.

[0006] To address at least one of the aforementioned shortcomings, a length measuring device was designed. Utility Model Content

[0007] In view of the above, the present invention provides a length measuring device, which aims to solve at least one of the defects pointed out in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] This utility model provides a length measuring device, comprising:

[0010] The first end positioning component is used to abut against the end face of the first end of the crystal rod;

[0011] The second end positioning component is used to abut against the end face of the second end of the crystal rod; there is a gap between the first end positioning component and the second end positioning component, which is a clamping gap, and the size of the clamping gap is adjustable;

[0012] Drive components are used to adjust the size of the clamping interval;

[0013] Measuring instruments are placed near the clamping interval and are used to measure the size of the clamping interval.

[0014] A pressure sensor is mounted on the first end positioning assembly / second end positioning assembly and located at one end of the clamping interval;

[0015] The pressure sensor is associated with the drive assembly.

[0016] In some embodiments of this utility model, the driving component includes:

[0017] The cylinder, the movable end of the cylinder is connected to the second end positioning assembly;

[0018] The control components include a control module and a controller. The control module is electrically connected to the cylinder and consists of an operation panel with a start switch and a reset switch. The controller is used to associate the pressure sensor and the cylinder.

[0019] In some embodiments of this utility model, the first end positioning component includes a first end plate, and the second end positioning component includes a second end plate.

[0020] In some embodiments of this utility model, the measuring instrument includes a scale plate, the zero mark of which is aligned with the side of the first end plate facing the second end plate.

[0021] In some embodiments of this invention, the pressure sensor is embedded in the side of the first end plate facing the second end plate.

[0022] In some embodiments of this utility model, a support platform is also included, which is disposed below the clamping interval; both the first end positioning component and the first end positioning component are disposed on the support platform.

[0023] In some embodiments of this utility model, the first end plate is fixed on the support platform, and the second end plate is slidably connected to the support platform.

[0024] In some embodiments of this utility model, the second end positioning component further includes:

[0025] The movable frame has a second end plate mounted on it; a slider is provided on the lower side of the movable frame, and a groove adapted to the slider is provided on the upper side of the support platform; a connecting plate is provided on the lower side of the movable frame, and the connecting plate is connected to the drive assembly.

[0026] A movable base is set on the upper side of the movable frame. An arc-shaped positioning groove is provided on the movable base. One end of the arc-shaped positioning groove extends to the side of the second end plate facing the first end plate. The length of the arc-shaped positioning groove is less than the length of the crystal rod.

[0027] In some embodiments of this utility model, a dot laser is also included, which is mounted on the side of the second end plate facing the scale plate.

[0028] In some embodiments of this utility model, a support plate is connected to the side of the second end plate facing the scale plate, and a clamping frame for clamping and fixing the point laser is installed on the support plate.

[0029] The embodiments of this utility model have at least the following advantages or beneficial effects:

[0030] In use, the crystal rod is placed in the clamping gap. The size of the clamping gap is adjusted by moving the first end positioning component and / or the second end positioning component through the drive assembly, so that the first end positioning component abuts against the end face of the first end of the crystal rod, and the second end positioning component abuts against the end face of the second end of the crystal rod. When the pressure value detected by the pressure sensor is greater than a preset threshold, the drive assembly stops operating. This ensures that the first end positioning component and the second end positioning component are in close contact with the crystal rod, and the length of the crystal rod is characterized by the size of the clamping gap, which is measured by a measuring tool. On the other hand, it also avoids damage to the crystal rod due to excessive force.

[0031] Other features and advantages of this invention will be set forth in the following description. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 Schematic diagram of the length measuring device Figure 1 ;

[0034] Figure 2 Schematic diagram of the length measuring device Figure 2 ;

[0035] Figure 3 Schematic diagram of the length measuring device Figure 3 ;

[0036] Figure 4 This is a structural schematic diagram of the second end plate, the movable frame, and the movable base;

[0037] Figure 5 This is a structural diagram of the support plate and clamping frame.

[0038] Icons: 1-Support platform, 2-Leg, 3-Scale plate, 4-Connecting block, 5-Cylinder, 6-Second end positioning component, 61-Moving frame, 62-Moving seat, 63-Second end plate, 64-Insertion block, 65-Slot, 66-Connecting plate, 67-Slider, 68-Slide groove, 69-Anti-slip structure, 7-Control component, 71-Support plate, 72-Clamping frame, 73-Dot laser, 74-Reinforcing rod, 75-Pressure sensor, 76-Control module, 77-Controller. Detailed Implementation

[0039] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention.

[0040] In the description of the embodiments of this utility model, it should be understood that the terms "lateral", "length", "upper", "lower", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and 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 the embodiments of this utility model.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0042] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0043] The embodiments of this utility model will be described in detail below.

[0044] See Figures 1-5 This embodiment provides a length measuring device, including a first end positioning component, a second end positioning component 6, a drive component, a measuring tool, and a pressure sensor 75.

[0045] The first end positioning component is used to abut against the end face of the first end of the crystal rod.

[0046] The second end positioning component 6 is used to abut against the end face of the second end of the crystal rod; there is a gap between the first end positioning component and the second end positioning component 6, which is the clamping gap (referring to the gap between the first end and the second end plate 63 below), and the size of the clamping gap is adjustable.

[0047] The drive assembly is used to adjust the clamping interval.

[0048] The measuring instrument is positioned close to the clamping interval and is used to measure the size of the clamping interval.

[0049] The pressure sensor 75 is disposed on the first end positioning assembly / second end positioning assembly 6 and located at one end of the clamping interval; the pressure sensor 75 is associated with the drive assembly.

[0050] In use, the crystal rod is placed in the clamping gap. The size of the clamping gap is adjusted by moving the first end positioning component and / or the second end positioning component 6 through the drive component, so that the first end positioning component abuts against the end face of the first end of the crystal rod and the second end positioning component 6 abuts against the end face of the second end of the crystal rod. When the pressure value detected by the pressure sensor 75 is greater than the preset threshold, the drive component stops operating. This ensures that the first end positioning component and the second end positioning component 6 are in close contact with the crystal rod, and the length of the crystal rod is characterized by the size of the clamping gap, which is measured by a measuring tool. On the other hand, it also avoids damage to the crystal rod due to excessive force.

[0051] It is understandable that when placing the crystal ingot in the clamping gap, the crystal ingot should be given upward support.

[0052] To facilitate the support of the crystal rod, the length measuring device also includes a support platform 1, which is located below the clamping interval. The support platform 1 has legs 2 for contacting the ground below it.

[0053] To facilitate the arrangement of the first end positioning component and the second end positioning component 6, both are mounted on the support platform 1. Specifically, in this embodiment, the first end positioning component includes a first end plate, and the second end positioning component 6 includes a second end plate 63; the first end plate is fixed to the support platform 1, and the second end plate 63 is slidably connected to the support platform 1; a pressure sensor 75 is embedded in the side of the first end plate facing the second end plate 63, and the detection end of the pressure sensor 75 can be exposed or retracted into the first end plate. That is, this embodiment adopts an arrangement in which the first end positioning component is fixed, the second end positioning component 6 is movable, and the pressure sensor 75 is mounted on the first end positioning component.

[0054] To better support and move the crystal rod, the second end positioning assembly 6 also includes a moving frame 61 and a moving base 62.

[0055] The second end plate 63 is mounted on the movable frame 61. A slider 67 is provided on the lower side of the movable frame 61, and a groove 68 adapted to the slider 67 is formed on the upper edge of the support platform 1. The movable frame 61 is slidably connected to the support platform 1 through the cooperation of the slider 67 and the groove 68. Both sides of the movable frame 61 are bent downwards and have inserts 64. Slots 65 adapted to the inserts 64 are formed on the sides of the support platform 1. The inserts 64 and slots 65 are slidably connected, thus making the movement of the movable frame 61 more stable. A connecting plate 66 is provided on the lower side of the movable frame 61, and the connecting plate 66 is connected to the drive assembly.

[0056] The movable seat 62 is located on the upper side of the movable frame 61. The movable seat 62 has an arc-shaped positioning groove for accommodating and supporting the crystal rod. One end of the arc-shaped positioning groove extends to one side of the movable seat 62 and the other end extends to the side of the second end plate 63 facing the first end plate. The length of the arc-shaped positioning groove is less than the length of the crystal rod. The inner wall of the arc-shaped positioning groove has an anti-slip structure 69.

[0057] In use, place the crystal rod in the arc-shaped positioning groove, and then slide the moving frame 61. The moving frame 61 drives the moving seat 62 and the second end plate 63 to move the crystal rod toward the first end plate, so that the two ends of the crystal rod abut against the first end plate and the second end plate 63 respectively.

[0058] It should be noted that the lateral dimensions of the movable frame 61 and the movable base 62 can be selected according to the length of the crystal rod so that the length of the arc-shaped positioning groove is appropriate; when the length of the arc-shaped positioning groove is close to the length of the crystal rod, it can better support and position the crystal rod.

[0059] The drive assembly includes a cylinder 5 and a control assembly 7. The cylinder 5 is located on the lower side of the support platform 1, and the movable end of the cylinder 5 is connected to the connecting plate 66. The control assembly 7 includes a control module 76 and a controller 77 mounted on the first end plate. The control module 76 is electrically connected to the cylinder 5. The control module 76 is an operation panel consisting of a start switch and a reset switch. The controller 77 is used to associate the pressure sensor 75 and the cylinder 5 so that when the pressure value detected by the pressure sensor 75 is greater than a preset threshold, the drive assembly stops operating.

[0060] The measuring instrument includes a scale plate 3, which is connected to one side of the support platform 1 via a connecting block 4; the zero mark of the scale plate 3 is aligned with the side of the first end plate facing the second end plate 63. In this way, the length of the crystal rod can be measured intuitively.

[0061] Furthermore, to address the human eye reading error problem mentioned in the background art, this embodiment also includes a dot laser 73, which is mounted on the side of the second end plate 63 facing the scale plate 3. The beam generated by the dot laser 73 is on the same plane as the side of the second end plate 63 facing the first end plate and can illuminate the scale plate 3. More specifically, a support plate 71 is connected to the side of the second end plate 63 facing the scale plate 3, and a clamping frame 72 for holding and fixing the dot laser 73 is mounted on the support plate 71 to facilitate the installation and fixing of the dot laser 73. A reinforcing rod 74 is provided between the support plate 71 and the second end plate 63 to enhance the stability of the support plate 71, thereby ensuring the accuracy of the scale indicated by the dot laser 73.

[0062] Finally, it should be noted that the above are merely preferred embodiments of this application and are not intended to limit this application. For those skilled in the art, this application can have various modifications and variations. Without conflict, the embodiments and features described in the embodiments of this application can be arbitrarily combined with each other. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A length measuring device, characterized in that, include: The first end positioning component is used to abut against the end face of the first end of the crystal rod; The second end positioning component is used to abut against the end face of the second end of the crystal rod; there is a gap between the first end positioning component and the second end positioning component, which is a clamping gap, and the size of the clamping gap is adjustable; A drive component for adjusting the size of the clamping interval; A measuring instrument is positioned close to the clamping interval and is used to measure the size of the clamping interval; A pressure sensor is disposed on the first end positioning assembly / second end positioning assembly and located at one end of the clamping interval; The pressure sensor is associated with the drive assembly.

2. The length measuring device of claim 1, wherein, The driving component includes: A cylinder, wherein the movable end of the cylinder is connected to the second end positioning assembly; The control component includes a control module and a controller. The control module is electrically connected to the cylinder and consists of an operation panel with a start switch and a reset switch. The controller is used to associate the pressure sensor and the cylinder.

3. The length measuring device of claim 1, wherein, The first end positioning component includes a first end plate, and the second end positioning component includes a second end plate.

4. The length measuring device of claim 3, wherein, The measuring instrument includes a scale plate, the zero mark of which is aligned with the side of the first end plate facing the second end plate.

5. The length measuring device of claim 4, wherein, The pressure sensor is embedded on the side of the first end plate facing the second end plate.

6. The length measuring device of claim 4, wherein, It also includes a support platform, which is disposed below the clamping interval; both the first end positioning component and the first end positioning component are disposed on the support platform.

7. The length measuring device of claim 6, wherein, The first end plate is fixed to the support platform, and the second end plate is slidably connected to the support platform.

8. The length measuring device of claim 7, wherein, The second end positioning component also includes: A movable frame, wherein the second end plate is disposed on the movable frame; a slider is disposed on the lower side of the movable frame, and a sliding groove adapted to the slider is provided on the upper side of the support platform; a connecting plate is disposed on the lower side of the movable frame, and the connecting plate is connected to the drive assembly; A movable base is disposed on the upper side of the movable frame. An arc-shaped positioning groove is provided on the movable base. One end of the arc-shaped positioning groove extends to the side of the second end plate facing the first end plate. The length of the arc-shaped positioning groove is less than the length of the crystal rod.

9. A length measuring device according to any one of claims 4 to 8, characterised in that, It also includes a dot laser, which is mounted on the side of the second end plate facing the scale plate.

10. The length measuring device of claim 9, wherein, A support plate is connected to the side of the second end plate facing the scale plate, and a clamping frame for clamping and fixing the dot laser is installed on the support plate.

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