A length measuring device based on temperature change of quartz tube

Abstract

The present invention discloses a length measuring device based on the temperature change of a quartz tube, which relates to the field of length measurement technology and includes a workbench and a quartz tube body. The inner side of the workbench is provided with a size adjustment mechanism and an intelligent adjustment range reciprocating mechanism. The length measuring device based on the temperature change of the quartz tube is provided with a gear transmission ratio amplification measurement mechanism. In the initial stage of measurement, the laser displacement sensor records a reference distance data. When the displacement plate moves due to the change in the length of the quartz tube, the distance between the two is measured again to obtain the displacement of the displacement plate. By combining the preset transmission ratio of the large-diameter gear and the small-diameter gear, the displacement of the displacement plate is reversely converted, thereby achieving high-precision measurement of the tiny length changes of the quartz tube caused by the temperature change. This solves the problem that some measurement methods in the prior art cannot meet the demand for accurate measurement of tiny changes in the length of the quartz tube and have low measurement accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of length measurement, in particular to a length measuring device based on temperature change of a quartz tube. Background Art

[0002] As an important inorganic non-metallic material, quartz tubes are widely used in many fields due to their excellent properties such as good thermal stability, low expansion coefficient, and stable chemical properties. In actual use, the length of quartz tubes will change accordingly due to temperature changes. However, there is currently a lack of specialized, easy-to-operate, and highly accurate device for measuring the length change of quartz tubes caused by temperature changes.

[0003] However, the existing device has the following shortcomings during use:

[0004] Some measurement methods in the existing technology, such as vernier calipers and micrometers, have limited measurement accuracy when measuring small changes in length and cannot meet the demand for accurate measurement of small changes in the length of the quartz tube, resulting in low measurement accuracy.

[0005] Therefore, we propose a length measuring device based on the temperature change of a quartz tube in order to solve the above problems. Summary of the Invention

[0006] The present invention provides a length measurement device based on temperature changes in a quartz tube. When the quartz tube undergoes a slight change in length due to temperature changes, a fixed plate contacting one end of the quartz tube is displaced, causing a first rack to move and drive a large-diameter gear to rotate. The meshing transmission between the large-diameter gear and the small-diameter gear amplifies the displacement, driving the small-diameter gear to rotate. This in turn causes a second rack to move a displacement plate. A laser displacement sensor emits a laser beam toward the displacement plate, which is reflected by the displacement plate and returned to the sensor. The distance between the sensor and the displacement plate is calculated. During the initial measurement phase, a baseline distance is recorded. When the displacement plate moves due to changes in the quartz tube's length, the distance between the two is measured again. The difference between the two distance data is used to determine the displacement of the displacement plate. Finally, when calculating the actual change in the quartz tube's length, the displacement of the displacement plate is reversed by combining the preset transmission ratio between the large-diameter gear and the small-diameter gear. This allows for high-precision measurement of small changes in the quartz tube's length due to temperature changes, thereby addressing the aforementioned problems raised in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solutions: a length measuring device based on temperature changes of a quartz tube, comprising a workbench and a quartz tube body, wherein a size adjustment mechanism and an intelligent adjustment range reciprocating mechanism are provided on the inner side of the workbench, a support and fixing mechanism for fixing one end of the quartz tube body is provided on the top of the size adjustment mechanism, a gear transmission ratio amplification and measurement mechanism and a quartz tube temperature measurement mechanism are provided on the top of the workbench, an intelligent switching heating and cooling mechanism is provided on the top of the intelligent adjustment range reciprocating mechanism, and an electrical control cabinet is installed on the top of the workbench, the wiring terminals of the electrical control cabinet being connected to the internal wiring of the device;

[0008] The gear transmission ratio amplification and measuring mechanism includes a shell, the inner side of which is rotatably connected to a first rotating shaft and a second rotating shaft, the outer surface of the first rotating shaft is fixedly sleeved with a large-diameter gear, the outer surface of the second rotating shaft is fixedly sleeved with three small-diameter gears, the large-diameter gear is meshed with one of the small-diameter gears, the inner side of the shell is provided with a first rack meshed with the large-diameter gear, the inner side of the shell is provided with two second racks meshed with the other two small-diameter gears, one side of the first rack is fixedly connected to a fixed plate, the fixed plate is in contact with one end of the quartz tube body, one side of the two second racks is movably passed through the shell and fixedly connected to a displacement plate, and a laser displacement sensor is provided on the top of the workbench.

[0009] Preferably, the size adjustment mechanism includes a bidirectional screw, which is rotatably connected to the inner side of the workbench, and a guide rod is fixedly connected to the inner side of the workbench. Two movable seats are threadedly installed on the outer surfaces of the bidirectional screw and the guide rod, and the two movable seats are movable through the workbench. A first servo motor is fixedly installed on one side of the workbench, and the output end of the first servo motor is movable through the workbench and fixedly connected to the smooth end of the bidirectional screw.

[0010] Preferably, the supporting and fixing mechanism includes two supporting seats, and the two supporting seats are fixedly connected to the top of two movable seats, wherein the top of one of the movable seats is fixedly connected to a fixed seat, a fixing groove is opened on one side of the fixed seat, and first electric push rods are fixedly installed on both sides of the fixed seat, and the telescopic ends of the two first electric push rods are movable through the fixed seat and the fixing groove and are fixedly connected to two arc-shaped splints.

[0011] Preferably, four limit grooves are opened on the inner side of the shell, and four limit blocks are slidably connected in the four limit grooves. The first rack is fixedly connected between two of the limit blocks, and the tops of the other two limit blocks are fixedly connected to the second rack. The top of the workbench is fixedly connected to a mounting plate, and the laser displacement sensor is installed on one side of the mounting plate.

[0012] Preferably, a second electric push rod is fixedly installed on the other side of the mounting plate, and the telescopic end of the second electric push rod movably passes through the mounting plate and is fixedly connected to the shell. Two dovetail grooves are provided on the top of the workbench, and two dovetail blocks are slidingly connected in the two dovetail grooves, and the tops of the two dovetail blocks are fixedly connected to the shell.

[0013] Preferably, a first electromagnetic clutch and a second electromagnetic clutch are installed on the inner side of the shell, the input end of the first electromagnetic clutch is fixedly connected to the shell, the output end of the first electromagnetic clutch is fixedly connected to the first rotating shaft, and the output end of the second electromagnetic clutch is fixedly connected to the second rotating shaft. A second servo motor is fixedly installed on one side of the shell, and the output end of the second servo motor moves through the shell and is fixedly connected to the input end of the second electromagnetic clutch.

[0014] Preferably, the intelligent adjustment range reciprocating mechanism includes two guide grooves, the two guide grooves are opened at the top of the workbench, the inner side of the workbench is rotatably connected to two one-way screws, the outer surfaces of the two one-way screws are threadedly installed with two moving blocks, and the two moving blocks moveably pass through the two guide grooves, one side of the workbench is rotatably installed with a second rotating wheel, the smooth ends of the two one-way screws moveably pass through the workbench, the outer surfaces of the two one-way screws are fixedly sleeved with two second rotating wheels, the two second rotating wheels are transmission-connected to the outer surfaces of the first rotating wheel with a toothed synchronous belt, one side of the workbench is fixedly connected to a mounting frame, and one side of the mounting frame is fixedly installed with a third servo motor, the output end of the third servo motor moves through the mounting frame and is fixedly connected to one end of the first rotating wheel.

[0015] Preferably, two connecting plates are fixedly connected to one side of the two movable seats, and two contact sensors are installed on one side of the two connecting plates.

[0016] Preferably, the intelligent switching heating and cooling mechanism includes two fixed frames, the two fixed frames are fixedly connected to the tops of the two moving blocks, two supporting frames are arranged on the tops of the two fixed frames, two fans are installed on the inner sides of the two supporting frames, two infrared electric heaters are installed on one side of the two supporting frames, two fourth servo motors are fixedly installed on the inner sides of the two fixed frames, the output ends of the two fourth servo motors are movable through the two fixed frames and are fixedly connected to the two supporting frames, two arc grooves are provided on the tops of the two fixed frames, two limit rods are fixedly connected to the bottoms of the two support frames, and the two limit rods are slidably connected to the two arc grooves.

[0017] Preferably, the quartz tube temperature measuring mechanism includes an L-shaped frame, the L-shaped frame is fixedly connected to the top of the workbench, an infrared laser temperature measuring sensor is installed on the inner top of the L-shaped frame, and a display screen is installed on the top of the workbench.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention sets a gear ratio amplification and measurement mechanism. The electrical control cabinet includes a control module, a temperature setting module, and a data processing module, which are mainly used for data algorithm processing, inputting target temperature values, and controlling related mechanisms. When the quartz tube body changes slightly in length due to temperature changes, the fixed plate contacted by one end thereof will be displaced, causing the first rack to move and drive the large-diameter gear to rotate. The meshing transmission of the large-diameter gear and the small-diameter gear will amplify the displacement, driving the small-diameter gear to rotate, and then causing the second rack to drive the displacement plate to move. The laser displacement sensor emits a laser beam to the displacement plate. The laser beam is reflected by the displacement plate and returns to the sensor, and the distance between the sensor and the displacement plate is calculated. In the initial stage of measurement, a reference distance data will be recorded. When the displacement plate moves due to the change in the length of the quartz tube, the distance between the two is measured again. The displacement of the displacement plate can be obtained by the difference between the two distance data. Finally, when calculating the actual length change of the quartz tube, the displacement of the displacement plate is reversely converted by combining the preset transmission ratio of the large-diameter gear and the small-diameter gear, thereby achieving high-precision measurement of the tiny length changes of the quartz tube caused by temperature changes. This solves the problem that some measurement methods in the existing technology, such as vernier calipers and micrometers, have limited measurement accuracy when measuring tiny length changes and cannot meet the precise measurement requirements of tiny changes in the length of the quartz tube, resulting in low measurement accuracy.

[0020] 2. The present invention sets a size adjustment mechanism and an intelligent adjustment range reciprocating mechanism. Under the drive of the first servo motor, the distance between the two moving seats can be quickly adjusted to achieve flexible adaptation to quartz tubes of different lengths, avoid frequent replacement of tooling fixtures, and greatly shorten the measurement preparation time. At the same time, the moving seat drives the contact sensor to move synchronously during the movement process. The contact sensor provides a trigger signal for the reciprocating motion of the moving block. Under the drive of the third servo motor, the toothed synchronous belt drives the two one-way screws to rotate, and the moving block moves along the guide groove. When the moving block contacts one of the contact sensors during the movement, the contact sensor feeds back the signal to the control module in the electrical control cabinet, and the control module immediately controls the third servo motor to reverse, causing the moving block to move in the opposite direction; when the moving block contacts the other contact sensor, the control module issues an instruction again to let the third servo motor rotate forward. This cycle realizes the reciprocating motion of the moving block, so that the intelligent switching heating and cooling mechanism moves back and forth along the axial direction of the quartz tube, which is convenient for adaptively adjusting the heating or cooling area according to the position of the contact sensor.

[0021] 3. The present invention is provided with an intelligent switching heating and cooling mechanism, and two fourth servo motors are used to drive the support frame to rotate, so as to facilitate switching the working positions of the infrared electric heater and the fan, and realize the conversion between heating and cooling states, avoiding the tedious operation of manually replacing the heating or cooling components of traditional equipment, and greatly shortening the measurement cycle. In the heating stage, the infrared electric heater can generate high-intensity and evenly distributed heat radiation. Combined with the intelligent adjustment range reciprocating mechanism, it drives it to move along the axial direction of the quartz tube, which can make the surface temperature of the quartz tube rise evenly, and effectively avoid measurement errors caused by local overheating or uneven heating; after the length measurement is completed, when the quartz tube body is cooled, the fan can generate strong airflow, and similarly achieve rapid cooling of the entire length of the quartz tube through reciprocating movement, so as to facilitate the rapid reduction of the temperature of the quartz tube to a safe operating range, facilitate the operator to quickly replace the sample, and improve the overall measurement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a three-dimensional diagram of the main structure of a length measuring device based on temperature change of a quartz tube according to the present invention;

[0023] Figure 2 This is a left-side structural perspective diagram of a length measuring device based on temperature change of a quartz tube according to the present invention;

[0024] Figure 3 This is a rear structural perspective view of a length measuring device based on temperature change of a quartz tube according to the present invention;

[0025] Figure 4 This is a bottom structural perspective view of a length measuring device based on temperature change of a quartz tube according to the present invention;

[0026] Figure 5 This is a structural stereogram of a displacement plate in a length measuring device based on temperature change of a quartz tube according to the present invention;

[0027] Figure 6 This is a structural stereogram of a contact sensor in a length measuring device based on temperature change of a quartz tube according to the present invention;

[0028] Figure 7 This is a structural perspective diagram of the second rotating wheel in a length measuring device based on temperature change of a quartz tube according to the present invention;

[0029] Figure 8 This is a structural stereogram of a shell in a length measuring device based on temperature change of a quartz tube according to the present invention;

[0030] Figure 9 This is a structural stereogram of an arc groove in a length measuring device based on temperature changes of a quartz tube according to the present invention.

[0031] In the figure: 1. workbench; 2. size adjustment mechanism; 201. bidirectional screw; 202. guide rod; 203. moving seat; 204. first servo motor; 3. support and fixing mechanism; 301. support seat; 302. fixing seat; 303. fixing groove; 304. first electric push rod; 305. arc-shaped clamping plate; 4. quartz tube body; 5. gear transmission ratio amplification and measurement mechanism; 501. housing; 502. first rotating shaft; 503. large-diameter gear; 504. second rotating shaft; 505. small-diameter gear; 506. limiting groove; 507. limiting block; 508. first rack; 509. second rack; 510. fixing plate; 511. displacement plate; 512. laser displacement sensor; 513. mounting plate; 514. second electric push rod; 515. dovetail groove; 51 6. Dovetail block; 517. First electromagnetic clutch; 518. Second electromagnetic clutch; 519. Second servo motor; 6. Intelligent adjustment range reciprocating mechanism; 601. Guide groove; 602. One-way screw; 603. Moving block; 604. First rotating wheel; 605. Second rotating wheel; 606. Toothed synchronous belt; 607. Mounting frame; 608. Third servo motor; 609. Connecting plate; 610. Contact sensor; 7. Intelligent switching heating and cooling mechanism; 701. Fixed frame; 702. Support frame; 703. Fan; 704. Infrared electric heater; 705. Fourth servo motor; 706. Arc groove; 707. Limit rod; 8. Quartz tube temperature measurement mechanism; 801. L-shaped frame; 802. Infrared laser temperature sensor; 9. Electrical control cabinet; 10. Display screen. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0033] like Figures 1-9 As shown, the present invention provides a technical solution: a length measuring device based on the temperature change of a quartz tube, comprising a workbench 1 and a quartz tube body 4. A size adjustment mechanism 2 and an intelligent adjustment range reciprocating mechanism 6 are provided on the inner side of the workbench 1. A support and fixing mechanism 3 for fixing one end of the quartz tube body 4 is provided on the top of the size adjustment mechanism 2. A gear transmission ratio amplification and measurement mechanism 5 and a quartz tube temperature measurement mechanism 8 are provided on the top of the workbench 1. An intelligent switching heating and cooling mechanism 7 is provided on the top of the intelligent adjustment range reciprocating mechanism 6. An electrical control cabinet 9 is installed on the top of the workbench 1. The wiring terminals of the electrical control cabinet 9 are connected to the internal wiring of the device.

[0034] The gear transmission ratio amplification and measuring mechanism 5 includes a shell 501, and the inner side of the shell 501 is rotatably connected to the first rotating shaft 502 and the second rotating shaft 504, the outer surface of the first rotating shaft 502 is fixedly sleeved with a large-diameter gear 503, and the outer surface of the second rotating shaft 504 is fixedly sleeved with three small-diameter gears 505, the large-diameter gear 503 is meshed with one of the small-diameter gears 505, the inner side of the shell 501 is provided with a first rack 508 meshed with the large-diameter gear 503, and the inner side of the shell 501 is provided with two second racks 509 meshed with the other two small-diameter gears 505, one side of the first rack 508 is fixedly connected to a fixed plate 510, and the fixed plate 510 is in contact with one end of the quartz tube body 4, one side of the two second racks 509 is movably passed through the shell 501 and fixedly connected to a displacement plate 511, and a laser displacement sensor 512 is provided on the top of the workbench 1.

[0035] like Figure 1 and Figure 4 As shown, the size adjustment mechanism 2 includes a bidirectional screw rod 201, which is rotatably connected to the inner side of the workbench 1, and a guide rod 202 is fixedly connected to the inner side of the workbench 1. Two movable seats 203 are threadedly installed on the outer surfaces of the bidirectional screw rod 201 and the guide rod 202, and the two movable seats 203 are movable through the workbench 1. A first servo motor 204 is fixedly installed on one side of the workbench 1, and the output end of the first servo motor 204 is movable through the workbench 1 and fixedly connected to the smooth end of the bidirectional screw rod 201. The bidirectional screw rod 201 is driven to rotate by the first servo motor 204. The bidirectional thread characteristics of the screw rod can drive the two movable seats 203 to move synchronously closer or farther away along the guide rod 202, so that the device can quickly and conveniently adjust the distance between the two movable seats 203, thereby adapting to quartz tube bodies 4 of different lengths, without the need to frequently replace tooling fixtures, effectively shortening the measurement preparation time, and significantly improving the versatility and measurement efficiency of the device.

[0036] like Figure 1 、 Figure 4 and Figure 6As shown, the supporting and fixing mechanism 3 includes two supporting seats 301, and the two supporting seats 301 are fixedly connected to the top of the two movable seats 203, and the top of one movable seat 203 is fixedly connected to a fixed seat 302, and a fixing groove 303 is opened on one side of the fixed seat 302, and first electric push rods 304 are fixedly installed on both sides of the fixed seat 302, and the telescopic ends of the two first electric push rods 304 are movable through the fixed seat 302 and the fixing groove 303 and are fixedly connected to two arc-shaped splints 305, and the two supporting seats 301 provide a stable bottom support for the quartz tube body 4 to ensure the stability of the quartz tube body 4 during the measurement process, and the first electric push rod 304 controls the opening and closing of the two arc-shaped splints 305 by telescoping, so as to facilitate the clamping and fixing of the quartz tube body 4, and ensure that the quartz tube body 4 will not be displaced during measurement, thereby ensuring the measurement accuracy.

[0037] like Figure 1 、 Figure 2 and Figure 8 As shown, four limiting grooves 506 are provided on the inner side of the housing 501, and four limiting blocks 507 are slidably connected in the four limiting grooves 506. The first rack 508 is fixedly connected between two of the limiting blocks 507, and the tops of the other two limiting blocks 507 are fixedly connected to the second rack 509. A mounting plate 513 is fixedly connected to the top of the workbench 1, and a laser displacement sensor 512 is installed on one side of the mounting plate 513. The cooperation between the limiting grooves 506 and the limiting blocks 507 provides precise guidance and limiting effects for the movement of the first rack 508 and the second rack 509. The first rack 508 and the second rack 509 can only move linearly along the direction of the limit groove 506 during the movement, avoiding measurement errors caused by rack shaking or offset, and ensuring the accuracy and stability of the gear transmission ratio amplification measurement mechanism 5. At the same time, the mounting plate 513 provides a stable mounting foundation for the laser displacement sensor 512, ensuring that the laser displacement sensor 512 can accurately transmit and receive laser beams to the displacement plate 511, thereby accurately measuring the displacement of the displacement plate 511, providing a guarantee for the subsequent high-precision measurement of the length change of the quartz tube body 4.

[0038] like Figure 1 、 Figure 5 and Figure 8As shown, a second electric push rod 514 is fixedly installed on the other side of the mounting plate 513, and the telescopic end of the second electric push rod 514 movably passes through the mounting plate 513 and is fixedly connected to the shell 501. Two dovetail grooves 515 are provided on the top of the workbench 1, and two dovetail blocks 516 are slidably connected in the two dovetail grooves 515, and the tops of the two dovetail blocks 516 are fixedly connected to the shell 501. The second electric push rod 514 can push the shell 501 to move along the dovetail groove 515 through telescoping, thereby realizing flexible adjustment of the overall position of the gear transmission ratio amplification measuring mechanism 5, and can adjust the measuring mechanism according to different measurement requirements or the installation position of the quartz tube body 4 to ensure good contact between the fixed plate 510 and one end of the quartz tube body 4, thereby ensuring the accuracy of the measurement. At the same time, the cooperation between the dovetail groove 515 and the dovetail block 516 provides a stable sliding guide, so that the shell 501 remains stable during the movement, avoiding the influence of shaking on the measurement accuracy.

[0039] like Figure 1 and Figure 8 As shown, a first electromagnetic clutch 517 and a second electromagnetic clutch 518 are installed on the inner side of the shell 501, the input end of the first electromagnetic clutch 517 is fixedly connected to the shell 501, the output end of the first electromagnetic clutch 517 is fixedly connected to the first rotating shaft 502, and the output end of the second electromagnetic clutch 518 is fixedly connected to the second rotating shaft 504. A second servo motor 519 is fixedly installed on one side of the shell 501, and the output end of the second servo motor 519 is movable through the shell 501 and fixedly connected to the input end of the second electromagnetic clutch 518. The on-off control of the power connection between the first rotating shaft 502 and the second rotating shaft 504 can be achieved through the first electromagnetic clutch 517 and the second electromagnetic clutch 518. During the measurement process, the electromagnetic clutch can be controlled to engage and disengage as needed to flexibly start and stop the measurement. The gear transmission is started or stopped to facilitate precise control of the measurement process. For example, when the quartz tube body 4 is installed or disassembled, the first electromagnetic clutch 517 can be engaged to prevent the rotation of the large-diameter gear 503 from interfering with the operation and measurement accuracy. When measuring, the first electromagnetic clutch 517 is disconnected so that the first rotating shaft 502 is not restricted, which is convenient for measuring operations. After the measurement is completed, by engaging the second electromagnetic clutch 518, the power of the second servo motor 519 can be transmitted to the second rotating shaft 504 through the second electromagnetic clutch 518, driving the small-diameter gear 505 to transmit. With the cooperation of the second rack 509, the first rack 508, the first rotating shaft 502, and the large-diameter gear 503, it is convenient to reset the fixed plate 510 and the displacement plate 511 to ensure the normal progress of the next measurement.

[0040] like Figure 1 、 Figure 4 and Figure 7As shown, the intelligent adjustment range reciprocating mechanism 6 includes two guide grooves 601, and the two guide grooves 601 are opened on the top of the workbench 1. The inner side of the workbench 1 is rotatably connected to two one-way screws 602, and the outer surfaces of the two one-way screws 602 are threadedly installed with two moving blocks 603, and the two moving blocks 603 are movable through the two guide grooves 601. A second rotating wheel 605 is rotatably installed on one side of the workbench 1, and the smooth ends of the two one-way screws 602 are movable through the workbench 1. The outer surfaces of the two one-way screws 602 are fixedly sleeved with two second rotating wheels 605, and the two second rotating wheels 605 are transmission-connected to the outer surface of the first rotating wheel 604 with a toothed synchronous belt 606. One side of the workbench 1 is fixedly connected to a mounting bracket 607, and one side of the mounting bracket 607 is fixedly installed with a third servo motor 608. The third servo motor 60 The output end of 8 is movable through the mounting bracket 607 and is fixedly connected to one end of the first rotating wheel 604. The first rotating wheel 604 is driven to rotate by the third servo motor 608, and the two second rotating wheels 605 are driven to rotate synchronously through the toothed synchronous belt 606, thereby rotating the two one-way screws 602. When the one-way screw 602 rotates, it drives the moving block 603 to move along the guide groove 601, realizing the linear motion of the moving block 603, so that the intelligent switching heating and cooling mechanism 7 can move back and forth along the axial direction of the quartz tube body 4, which is convenient for uniform heating or cooling operation of the quartz tube body 4, avoiding excessive local temperature differences affecting the measurement results. At the same time, the guide groove 601 provides a stable guide for the movement of the moving block 603, ensuring the linearity and stability of the movement of the moving block 603, and ensuring the accuracy and consistency of the heating or cooling operation.

[0041] like Figure 1 、 Figure 4 and Figure 6 As shown, two connecting plates 609 are fixedly connected to one side of the two moving seats 203, and two contact sensors 610 are installed on one side of the two connecting plates 609. When the moving seat 203 moves under the action of the size adjustment mechanism 2, the connecting plates 609 and the contact sensors 610 will be driven to move synchronously. The contact sensors 610 provide trigger signals for the reciprocating motion of the moving block 603. When the moving block 603 contacts one of the contact sensors 610 during the movement, the contact sensor 610 feeds back the signal to the control module in the electrical control cabinet 9. After receiving the signal, the control module controls the third servo motor 608 to reverse, so that the moving block 603 moves in the opposite direction; when the moving block 603 contacts the other contact sensor 610, the control module issues an instruction again to let the third servo motor 608 rotate forward, and so on and so forth, realizing the reciprocating motion of the moving block 603, so that the moving range of the intelligent switching heating and cooling mechanism 7 can be adaptively adjusted according to the length of the quartz tube body 4, without the need to manually set the moving range, thereby improving the intelligence level of the device and the convenience of operation.

[0042] like Figure 1 、 Figure 4 and Figure 9 As shown, the intelligent switching heating and cooling mechanism 7 includes two fixed frames 701, the two fixed frames 701 are fixedly connected to the tops of the two moving blocks 603, two support frames 702 are arranged on the tops of the two fixed frames 701, two fans 703 are installed on the inner sides of the two support frames 702, two infrared electric heaters 704 are installed on one side of the two support frames 702, two fourth servo motors 705 are fixedly installed on the inner sides of the two fixed frames 701, the output ends of the two fourth servo motors 705 are movable through the two fixed frames 701 and are fixedly connected to the two support frames 702, two arc grooves 706 are provided on the tops of the two fixed frames 701, two limit rods 707 are fixedly connected to the bottoms of the two support frames 702, and the two limit rods 707 are slidably connected to the two arc grooves 706, the support frames 702 are driven to rotate by the fourth servo motors 705, and the limit rods 707 are driven to rotate by the limit rods 707. 07 slides in the arc groove 706 to realize the switching of the working positions of the infrared electric heater 704 and the fan 703. During the heating stage, the infrared electric heater 704 can generate high-intensity and evenly distributed heat radiation. Combined with the intelligent adjustment range reciprocating mechanism 6, it drives it to move axially along the quartz tube body 4, which can make the surface temperature of the quartz tube body 4 rise evenly, effectively avoiding measurement errors caused by local overheating or uneven heating; after the length measurement is completed, when the quartz tube body 4 is cooled, the fan 703 can generate a strong airflow, and also realize rapid cooling of the entire length of the quartz tube body 4 through reciprocating movement, which is convenient for the operator to quickly reduce the temperature of the quartz tube body 4 to a safe operating range, and facilitate the operator to quickly replace the sample, thereby improving the overall measurement efficiency, realizing the automatic switching of the heating and cooling functions, avoiding the tedious operation of manual replacement of heating or cooling components of traditional equipment, and greatly shortening the measurement cycle.

[0043] like Figure 1 and Figure 4 As shown, the quartz tube temperature measuring mechanism 8 includes an L-shaped frame 801, which is fixedly connected to the top of the workbench 1. An infrared laser temperature sensor 802 is installed on the inner top of the L-shaped frame 801, and a display screen 10 is installed on the top of the workbench 1. The infrared laser temperature sensor 802 can measure the surface temperature of the quartz tube body 4 in a non-contact, fast and accurate manner, and feed back the temperature data to the electrical control cabinet 9 in real time. The display screen 10 is convenient for displaying the real-time temperature value of the quartz tube body 4, which is convenient for the operator to grasp the temperature change of the quartz tube body 4 in real time and to control the intelligent switching heating and cooling mechanism 7 according to the measurement requirements; after the measurement is completed, the display screen 10 can display the length change measurement data of the quartz tube body 4 caused by the temperature change, helping the operator to quickly understand the measurement results and perform data comparison and analysis.

[0044] The usage and working principle of this device: In the measurement preparation stage, first, according to the actual length of the quartz tube body 4, start the first servo motor 204 to drive the bidirectional screw 201 to rotate, driving the two moving seats 203 to move along the guide rod 202. When the moving seat 203 moves, it drives the contact sensor 610 to move synchronously. The contact sensor 610 provides a trigger signal for the reciprocating motion of the moving block 603. After adjusting the distance between the two moving seats 203, the quartz tube body 4 is placed on the two support seats 301, and one end of the quartz tube body 4 is inserted into the fixed groove 303, so that one end of the quartz tube body 4 is located between the two arc-shaped splints 305. Then start the first electric push rod 304 to control the two arc-shaped splints 305 to clamp the quartz tube body 4 to ensure that it is stable and does not move during the measurement process.

[0045] During the position adjustment stage of the measuring mechanism, the first electromagnetic clutch 517 is engaged to restrict the rotation of the first rotating shaft 502, preventing the first rack 508 and the fixed plate 510 from moving. Then, the second electric push rod 514 is activated to push the housing 501 along the dovetail groove 515, so that the fixed plate 510 is in close contact with one end of the quartz tube body 4, providing an accurate reference for subsequent measurements. After the fixed plate 510 moves to the target position, the first electromagnetic clutch 517 is disconnected (the second electromagnetic clutch 518 is in the disconnected state at this time), thereby releasing the restriction on the first rotating shaft 502.

[0046] During the heating and temperature monitoring stage, in the operation interface of the electrical control cabinet 9, find the temperature setting module, input the target temperature value, and start the third servo motor 608 to drive the first rotating wheel 604 to rotate, so that the toothed synchronous belt 606 drives the two second rotating wheels 605 and the one-way screw 602 to rotate, so that the moving block 603 moves along the guide groove 601. When the moving block 603 contacts one of the contact sensors 610 during the movement, the contact sensor 610 feeds back the signal to the control module in the electrical control cabinet 9. After receiving the signal, the control module controls the third servo motor 608 to reverse, so that the moving block 603 moves in the opposite direction. When the moving block 603 contacts the other during the reverse movement, the moving block 603 moves in the opposite direction. When the contact sensor 610 contacts, similarly, the control module controls the third servo motor 608 to rotate forward, thereby causing the moving block 603 to drive the infrared electric heater 704 to move back and forth along the axial direction of the quartz tube body 4. By turning on the infrared electric heater 704, the quartz tube body 4 is evenly heated. At the same time, the infrared laser temperature sensor 802 continuously measures the surface temperature of the quartz tube body 4 non-contactly and transmits the data to the electrical control cabinet 9 in real time. The operator observes the temperature change trend through the display screen 10. When the temperature approaches the target value, the control module automatically adjusts the power or moving speed of the infrared electric heater 704 to make the temperature rise steadily to the target temperature and maintain a constant temperature, thereby ensuring that the temperature inside the quartz tube body 4 is uniform.

[0047] During the length measurement phase, as the quartz tube body 4 undergoes a slight length change at the target temperature, the fixed plate 510 is displaced, driving the first rack 508 to move, thereby rotating the large-diameter gear 503. The displacement is amplified by the meshing transmission with the small-diameter gear 505, driving the second rack 509 to move, causing the displacement plate 511 to produce a corresponding displacement. The laser displacement sensor 512 emits a laser beam to the displacement plate 511. After reflection, the distance to the displacement plate 511 is calculated. The displacement of the displacement plate 511 is obtained by the difference with the initial reference distance. The data processing module of the electrical control cabinet 9 combines the transmission ratio with the reverse conversion to obtain the actual length change value of the quartz tube body 4, which is displayed and stored on the display screen 10.

[0048] The measurement is completed and the processing stage is completed. After the measurement is completed, the fourth servo motor 705 is started to drive the support frame 702 to rotate, and the limit rod 707 slides in the arc groove 706, so that the infrared electric heater 704 and the fan 703 are switched in the working position, so that the fan 703 is in the working position. By starting the fan 703, a strong airflow is generated, and the third servo motor 608 continues to work, driving the fan 703 to move back and forth along the axial direction of the quartz tube body 4, so that the quartz tube body 4 is quickly cooled to a safe range.

[0049] In the reset and sorting stage, the second electric push rod 514 is started to drive the housing 501 to move along the dovetail groove 515 to the initial position, and by engaging the second electromagnetic clutch 518 (the first electromagnetic clutch 517 is in the disconnected state at this time), the second servo motor 519 is started to drive the small diameter gear 505 to transmit. Under the cooperation of the second rack 509, the large diameter gear 503 and the first rack 508, the fixed plate 510 and the displacement plate 511 are reset to prepare for the next measurement. Finally, the first electric push rod 304 is started to loosen the arc clamping plate 305, and the quartz tube body 4 can be taken out.

[0050] The wiring diagram of the first servo motor 204, the first electric push rod 304, the laser displacement sensor 512, the second electric push rod 514, the first electromagnetic clutch 517, the second electromagnetic clutch 518, the second servo motor 519, the third servo motor 608, the contact sensor 610, the fan 703, the infrared electric heater 704, the fourth servo motor 705, the infrared laser temperature sensor 802, the electrical control cabinet 9 and the display screen 10 in the present invention is common knowledge in the art, and its working principle is a well-known technology. The models are selected according to actual use. Therefore, the control method and wiring layout of the first servo motor 204, the first electric push rod 304, the laser displacement sensor 512, the second electric push rod 514, the first electromagnetic clutch 517, the second electromagnetic clutch 518, the second servo motor 519, the third servo motor 608, the contact sensor 610, the fan 703, the infrared electric heater 704, the fourth servo motor 705, the infrared laser temperature sensor 802, the electrical control cabinet 9 and the display screen 10 will not be explained in detail.

[0051] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A length measuring device based on temperature change of a quartz tube, characterized in that: The device comprises a workbench (1) and a quartz tube body (4), wherein a size adjustment mechanism (2) and an intelligent adjustment range reciprocating mechanism (6) are provided on the inner side of the workbench (1), a support fixing mechanism (3) for fixing one end of the quartz tube body (4) is provided on the top of the size adjustment mechanism (2), a gear transmission ratio amplification and measurement mechanism (5) and a quartz tube temperature measurement mechanism (8) are provided on the top of the workbench (1), an intelligent switching heating and cooling mechanism (7) is provided on the top of the intelligent adjustment range reciprocating mechanism (6), and an electrical control cabinet (9) is installed on the top of the workbench (1), wherein the wiring terminals of the electrical control cabinet (9) are connected to the internal wiring of the device; The gear transmission ratio amplification and measurement mechanism (5) comprises a housing (501), wherein a first rotating shaft (502) and a second rotating shaft (504) are rotatably connected on the inner side of the housing (501), a large-diameter gear (503) is fixedly sleeved on the outer surface of the first rotating shaft (502), and three small-diameter gears (505) are fixedly sleeved on the outer surface of the second rotating shaft (504), wherein the large-diameter gear (503) is meshedly connected with one of the small-diameter gears (505), and a gear is provided on the inner side of the housing (501) to engage with the large-diameter gear (503). 3) a meshing first rack (508), two second racks (509) meshing with the other two small-diameter gears (505) are provided on the inner side of the housing (501), one side of the first rack (508) is fixedly connected to a fixed plate (510), the fixed plate (510) is in contact with one end of the quartz tube body (4), one side of the two second racks (509) is movable through the housing (501) and fixedly connected to a displacement plate (511), and a laser displacement sensor (512) is provided on the top of the workbench (1); The intelligent adjustment range reciprocating mechanism (6) includes two guide grooves (601), the two guide grooves (601) are opened on the top of the workbench (1), the inner side of the workbench (1) is rotatably connected to two one-way screw rods (602), the outer surfaces of the two one-way screw rods (602) are threadedly installed with two moving blocks (603), and the two moving blocks (603) are movable through the two guide grooves (601), and a second rotating wheel (605) is rotatably installed on one side of the workbench (1), and the smooth ends of the two one-way screw rods (602) are movable through the two guide grooves (601). On the workbench (1), the outer surfaces of the two one-way screw rods (602) are fixedly sleeved with two second rotating wheels (605), the outer surfaces of the two second rotating wheels (605) and the first rotating wheel (604) are connected to each other via a toothed synchronous belt (606), one side of the workbench (1) is fixedly connected to a mounting frame (607), one side of the mounting frame (607) is fixedly mounted with a third servo motor (608), the output end of the third servo motor (608) is movable through the mounting frame (607) and is fixedly connected to one end of the first rotating wheel (604); The intelligent switching heating and cooling mechanism (7) comprises two fixed frames (701), the two fixed frames (701) are fixedly connected to the tops of the two moving blocks (603), two support frames (702) are arranged on the tops of the two fixed frames (701), two fans (703) are installed on the inner sides of the two support frames (702), two infrared electric heaters (704) are installed on one side of the two support frames (702), two fourth servo motors (705) are fixedly installed on the inner sides of the two fixed frames (701), the output ends of the two fourth servo motors (705) are movable through the two fixed frames (701) and are fixedly connected to the two support frames (702), two arc grooves (706) are provided on the tops of the two fixed frames (701), two limit rods (707) are fixedly connected to the bottoms of the two support frames (702), and the two limit rods (707) are slidably connected to the two arc grooves (706).

2. The length measuring device based on temperature change of a quartz tube according to claim 1, characterized in that: The size adjustment mechanism (2) includes a bidirectional screw (201), the bidirectional screw (201) is rotatably connected to the inner side of the workbench (1), the inner side of the workbench (1) is fixedly connected to a guide rod (202), the outer surfaces of the bidirectional screw (201) and the guide rod (202) are threadedly mounted with two movable seats (203), and the two movable seats (203) are movably passed through the workbench (1), and a first servo motor (204) is fixedly mounted on one side of the workbench (1), and the output end of the first servo motor (204) is movably passed through the workbench (1) and fixedly connected to the smooth end of the bidirectional screw (201).

3. The length measuring device based on temperature change of a quartz tube according to claim 2, characterized in that: The supporting and fixing mechanism (3) comprises two supporting seats (301), the two supporting seats (301) being fixedly connected to the tops of two movable seats (203), the top of one of the movable seats (203) being fixedly connected to a fixing seat (302), a fixing groove (303) being provided on one side of the fixing seat (302), first electric push rods (304) being fixedly installed on both sides of the fixing seat (302), and the telescopic ends of the two first electric push rods (304) being movably inserted through the fixing seat (302) and the fixing groove (303) and being fixedly connected to two arc-shaped clamping plates (305).

4. The length measuring device based on temperature change of a quartz tube according to claim 1, characterized in that: Four limiting grooves (506) are provided on the inner side of the shell (501), and four limiting blocks (507) are slidably connected in the four limiting grooves (506). The first rack (508) is fixedly connected between two of the limiting blocks (507), and the tops of the other two limiting blocks (507) are fixedly connected to the second rack (509). A mounting plate (513) is fixedly connected to the top of the workbench (1), and the laser displacement sensor (512) is mounted on one side of the mounting plate (513).

5. The length measuring device based on temperature change of a quartz tube according to claim 4, characterized in that: A second electric push rod (514) is fixedly mounted on the other side of the mounting plate (513), and the telescopic end of the second electric push rod (514) movably passes through the mounting plate (513) and is fixedly connected to the housing (501). Two dovetail grooves (515) are provided on the top of the workbench (1), and two dovetail blocks (516) are slidably connected in the two dovetail grooves (515), and the tops of the two dovetail blocks (516) are fixedly connected to the housing (501).

6. The length measuring device based on temperature change of a quartz tube according to claim 1, characterized in that: A first electromagnetic clutch (517) and a second electromagnetic clutch (518) are installed on the inner side of the housing (501), the input end of the first electromagnetic clutch (517) is fixedly connected to the housing (501), the output end of the first electromagnetic clutch (517) is fixedly connected to the first rotating shaft (502), and the output end of the second electromagnetic clutch (518) is fixedly connected to the second rotating shaft (504). A second servo motor (519) is fixedly installed on one side of the housing (501), and the output end of the second servo motor (519) is movable through the housing (501) and fixedly connected to the input end of the second electromagnetic clutch (518).

7. The length measuring device based on temperature change of a quartz tube according to claim 3, characterized in that: Two connecting plates (609) are fixedly connected to one side of the two movable seats (203), and two contact sensors (610) are installed on one side of the two connecting plates (609).

8. The length measuring device based on temperature change of a quartz tube according to claim 1, characterized in that: The quartz tube temperature measurement mechanism (8) comprises an L-shaped frame (801), the L-shaped frame (801) is fixedly connected to the top of the workbench (1), an infrared laser temperature measurement sensor (802) is installed on the inner top of the L-shaped frame (801), and a display screen (10) is installed on the top of the workbench (1).

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