Adjustable plate thickness intelligent measuring device and system thereof

Abstract

The application discloses an adjustable plate thickness intelligent measuring device and system, relates to the field of laser measurement, and aims to solve the problems of limited range, complicated operation and precision affected by plate shaking and sensor spacing error of a traditional measuring device. The device comprises a mounting frame, first and second cross rods which are equal in length and coaxially rotate on the mounting frame, and four laser sensors which are fixedly sleeved on the ends of the rods and embedded in the first and second cross rods, and a parallel rod is arranged to ensure that the laser is perpendicular to the plate when the sensors are translated; a stepping motor and a gear are arranged to drive the cross rods to synchronously and reversely adjust the spacing, and the sensors are fixed by bolts; and the system comprises a driving control module, a data processing module and a synchronous triggering module, can intelligently adapt to different plate thicknesses, and guarantees the measuring precision.

Description

Technical Field

[0001] This invention relates to the field of laser measurement technology, and in particular to an adjustable plate thickness intelligent measurement device and system. Background Technology

[0002] In modern industrial production, the thickness measurement of sheet metal is a key aspect of quality control. Traditional methods for sheet thickness measurement typically employ contact measurement or fixed-spacing non-contact measurement. Contact measurement is prone to damaging the sheet metal surface and is highly susceptible to mechanical errors. Fixed-spacing non-contact measurement, such as laser thickness measurement, avoids contact damage, but its laser sensor has an effective measurement range. This means that for sheets with significant thickness variations, it is necessary to frequently adjust the spacing of the measuring device or replace sensors with different ranges, resulting in complex operations and low efficiency. When the sheet metal thickness exceeds the effective measurement range of the sensor, measurement accuracy cannot be guaranteed or may even become impossible to measure.

[0003] Furthermore, in actual industrial production lines, the sheet metal often vibrates or shakes during transport. If the sensors cannot achieve high synchronization, meaning the upper and lower sensors cannot measure the upper and lower surfaces of the sheet metal at the same time, the vibration of the sheet metal will cause errors in the measurement data, seriously affecting the accuracy of the measurement. Some existing adjustable-spacing measurement devices often focus on the adjustment function, neglecting the maintenance of the perpendicularity of the laser emission direction during the adjustment process, as well as the real-time accurate calibration of the sensor spacing. This makes it difficult to meet the accuracy and stability requirements of high-precision industrial production, even if the spacing is adjustable. Therefore, how to design an intelligent measurement device that can intelligently adjust the measurement spacing to adapt to different sheet thicknesses, while ensuring the perpendicularity and synchronization of the measurement sensor direction, and can accurately calibrate the sensor spacing in real time, has become an urgent technical problem to be solved. Summary of the Invention

[0004] The purpose of this invention is to provide an adjustable plate thickness intelligent measuring device and system, in order to solve the problems of limited measurement range, complex adjustment operation, and measurement accuracy affected by plate shaking and inaccurate sensor spacing in the prior art as mentioned in the background.

[0005] To solve the above technical problems, the present invention adopts an adjustable plate thickness intelligent measuring device, comprising: a mounting frame, on which a first cross rod and a second cross rod are rotatably connected, the first cross rod and the second cross rod are of equal length and rotate coaxially around the same rotation axis, and the portions of the first cross rod and the second cross rod on the same side of the rotation axis are of equal length; One end of the first crossbar is fixedly connected to a first fixing sleeve, and a first laser sensor is fixedly embedded inside the first fixing sleeve; the other end of the first crossbar is fixedly connected to a second fixing sleeve, and a second laser sensor is fixedly embedded inside the second fixing sleeve. A third fixing sleeve is fixedly connected to one end of the second crossbar, and a third laser sensor is fixedly embedded inside the third fixing sleeve; a fourth fixing sleeve is fixedly connected to the other end of the second crossbar, and a fourth laser sensor is fixedly embedded inside the fourth fixing sleeve. Among them, the first laser sensor and the third laser sensor are arranged opposite each other along the thickness direction of the plate to be measured, and the second laser sensor and the fourth laser sensor are arranged opposite each other along the same direction. A first parallel rod is provided on one side of the first cross rod along its length. One end of the first parallel rod is rotatably connected to the mounting bracket via a rotating shaft, and the other end is rotatably connected to the first fixed sleeve via a rotating shaft, which is used to restrict the first fixed sleeve to move only in the translation direction. A second parallel rod is provided on the other side of the first cross rod along the length direction. One end of the second parallel rod is rotatably connected to the mounting bracket through a rotating shaft, and the other end is rotatably connected to the second fixed sleeve through a rotating shaft, which is used to restrict the second fixed sleeve to move only in the translation direction. A third parallel rod is provided on one side of the second cross rod along its length. One end of the third parallel rod is rotatably connected to the mounting bracket via a rotating shaft, and the other end is rotatably connected to the third fixed sleeve via a rotating shaft, which is used to restrict the third fixed sleeve to move only in the translation direction. A fourth parallel rod is provided on the other side of the second cross rod along the length direction. One end of the fourth parallel rod is rotatably connected to the mounting bracket through a rotating shaft, and the other end is rotatably connected to the fourth fixed sleeve through a rotating shaft, which is used to restrict the fourth fixed sleeve to move only in the translation direction.

[0006] Furthermore, the first parallel rod and the first cross rod are parallel to each other, and the length of the first parallel rod is equal to the length from the common rotation axis between the first cross rod and the second cross rod to the rotation axis between the first cross rod and the first fixed sleeve, so as to ensure that the laser emission direction is always perpendicular to the surface of the plate to be tested during the translation of the first fixed sleeve.

[0007] Furthermore, the second parallel rod is parallel to the first cross rod, and the length of the second parallel rod is equal to the length from the common rotation axis between the first cross rod and the second cross rod to the rotation axis between the first cross rod and the second fixed sleeve, so as to ensure that the laser emission direction is always perpendicular to the surface of the plate to be tested during the translation of the second fixed sleeve.

[0008] Furthermore, the third parallel rod is parallel to the second cross rod, and the length of the third parallel rod is equal to the length from the shared rotation axis between the second cross rod and the first cross rod to the rotation axis between the second cross rod and the third fixed sleeve, so as to ensure that the laser emission direction remains perpendicular to the surface of the plate to be tested during the translation of the third fixed sleeve.

[0009] Furthermore, the fourth parallel rod is parallel to the second cross rod, and the length of the fourth parallel rod is equal to the length from the shared rotation axis between the second cross rod and the first cross rod to the rotation axis between the second cross rod and the fourth fixed sleeve, so as to ensure that the laser emission direction remains perpendicular to the surface of the plate to be tested during the translation of the fourth fixed sleeve.

[0010] Furthermore, a stepper motor is fixedly connected to one side of the mounting bracket by bolts. The drive shaft of the stepper motor is coaxially fixedly connected to the rotation shaft of the first cross rod through a coupling, and the connection point coincides with the rotation shaft of the first cross rod, which is used to drive the first cross rod to rotate around the rotation shaft.

[0011] Furthermore, the end of the fourth parallel rod near the mounting bracket is coaxially and fixedly connected to the second gear; the gear ratio of the first gear and the second gear is 1:1 and they mesh with each other, which is used to realize the synchronous reverse rotation of the second parallel rod and the fourth parallel rod, thereby driving the first cross rod and the second cross rod to rotate together.

[0012] Furthermore, the side wall of the first fixed sleeve is provided with an internal threaded hole, and the internal thread of the internal threaded hole is fitted with a first fixing bolt. The first fixing bolt passes through the side wall of the first fixed sleeve and abuts against the outer wall of the first laser sensor. The side wall of the second fixed sleeve is provided with an internal threaded hole, and the internal thread of the internal threaded hole is fitted with a second fixing bolt. The second fixing bolt passes through the side wall of the second fixed sleeve and abuts against the outer wall of the second laser sensor. The side wall of the third fixing sleeve is provided with an internal threaded hole, and the internal thread of the internal threaded hole is fitted with a third fixing bolt. The third fixing bolt passes through the side wall of the third fixing sleeve and abuts against the outer wall of the third laser sensor. The side wall of the fourth fixing sleeve has an internal threaded hole, and the internal thread of the internal threaded hole is fitted with a fourth fixing bolt. The fourth fixing bolt passes through the side wall of the fourth fixing sleeve and abuts against the outer wall of the fourth laser sensor.

[0013] Furthermore, the connection between the first and third laser sensors, and the connection between the second and fourth laser sensors, are both perpendicular to the transmission direction of the material under test, and the two connections are parallel to each other, ensuring that the measurement direction is completely consistent with the thickness direction of the material.

[0014] This invention provides another technical solution: a measurement system for an adjustable plate thickness intelligent measurement device, comprising: a drive control module, a data processing module, and a synchronization triggering module; The drive control module includes a stepper motor controller and a stepper motor. The stepper motor controller and the stepper motor are electrically connected via a pulse signal line. The controller is used to receive speed / angle control commands output by the data processing module and drive the stepper motor to rotate the first crossbar. The data processing module includes a microcontroller and a parameter storage unit; the microcontroller is electrically connected to the first laser sensor, the second laser sensor, the third laser sensor, the fourth laser sensor, and the stepper motor controller via a communication bus; the parameter storage unit pre-stores the rotation axis position parameters of the first and second crossbars; the microcontroller has two built-in core algorithms: Spacing calibration algorithm: Based on the distance data collected by the second and fourth laser sensors and combined with the pre-stored rotation axis position parameters, calculate the real-time spacing between the first and third laser sensors; Plate thickness calculation algorithm: Based on the real-time distance between the first laser sensor and the third laser sensor, subtract the sum of the distances from the sensors to the plate surface collected by the two sensors to obtain the real-time thickness value of the plate to be measured. The synchronous trigger module is electrically connected to the microcontroller and the laser sensing module. It is used to receive the synchronous trigger signal output by the microcontroller and drive the first laser sensor and the third laser sensor to emit lasers synchronously, and the second laser sensor and the fourth laser sensor to emit lasers synchronously. This ensures that the distance data between the upper and lower surfaces of the board are collected at the same time, eliminating the influence of board shaking on the measurement accuracy.

[0015] Compared with the prior art, the beneficial effects of the present invention include: 1. This invention utilizes a crossbar structure in conjunction with a stepper motor drive to achieve intelligent and precise adjustment of the spacing between measurement sensors. It can actively adapt to plates of different thicknesses, thereby overcoming the limitations of traditional fixed-spacing measurement methods and expanding the applicability of the device.

[0016] 2. The parallelogram structure formed between the parallel rod and the fixed sleeve ensures that each laser sensor always maintains its laser emission direction perpendicular to the surface of the plate being measured during the spacing adjustment process, effectively avoiding measurement errors caused by angular deviation and ensuring high-precision measurement results.

[0017] 3. By introducing a second and a fourth laser sensor and corresponding data processing algorithms, the actual measurement distance between the first and third laser sensors can be calibrated in real time, compensating for minor errors that may occur during the movement of the mechanical structure and further improving the accuracy of the measurement. Attached Figure Description

[0018] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts. Wherein: Figure 1 The schematic diagram shows a structural schematic of an adjustable plate thickness intelligent measuring device according to an embodiment of the present invention; Figure 2 The illustration shows a measurement diagram of an adjustable plate thickness intelligent measuring device according to an embodiment of the present invention; Figure 3 The schematic diagram shows a cross-sectional view of an adjustable plate thickness intelligent measuring device according to an embodiment of the present invention. Figure 4 The schematic diagram shows a first gear and second gear transmission structure of an adjustable plate thickness intelligent measuring device according to an embodiment of the present invention. Figure 5 The schematic diagram shows a first crossbar and a second crossbar structure of an adjustable plate thickness intelligent measuring device according to an embodiment of the present invention. Figure 6 The schematic diagram shows a first parallel rod and a second parallel rod structure of an adjustable plate thickness intelligent measuring device according to an embodiment of the present invention. Figure 7 The diagram illustrates the structure of the third and fourth parallel rods of an adjustable plate thickness intelligent measuring device according to an embodiment of the present invention.

[0019] Labels in the diagram: 1. Mounting bracket; 2. First crossbar; 3. Second crossbar; 4. First fixing sleeve; 401. First fixing bolt; 5. First laser sensor; 6. Second fixing sleeve; 601. Second fixing bolt; 7. Second laser sensor; 8. First parallel rod; 9. Second parallel rod; 10. Third fixing sleeve; 1001. Third fixing bolt; 11. Third laser sensor; 12. Fourth fixing sleeve; 1201. Fourth fixing bolt; 13. Fourth laser sensor; 14. Third parallel rod; 15. Fourth parallel rod; 16. Stepper motor; 17. First gear; 18. Second gear. Detailed Implementation

[0020] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0021] Please see Figure 1 - Figure 7 The present invention provides an adjustable plate thickness intelligent measuring device, which includes: a mounting frame 1, on which a first cross rod 2 and a second cross rod 3 are rotatably connected. Specifically, the first cross rod 2 and the second cross rod 3 are of equal length and rotate coaxially around the same rotation axis. In addition, the portions of the first cross rod 2 and the second cross rod 3 on the same side of the rotation axis are of equal length. This structure ingeniously constitutes an adjusting arm, which can change the distance between sensors by rotation.

[0022] To measure the thickness of the sheet material, a first fixing sleeve 4 and a second fixing sleeve 6 are fixedly connected to both ends of the first cross rod 2, respectively. Similarly, a third fixing sleeve 10 and a fourth fixing sleeve 12 are fixedly connected to both ends of the second cross rod 3, respectively. A first laser sensor 5 is fixedly embedded in the first fixing sleeve 4 of the measurement system, a second laser sensor 7 is fixedly embedded in the second fixing sleeve 6 of the measurement system, a third laser sensor 11 is fixedly embedded in the third fixing sleeve 10 of the measurement system, and a fourth laser sensor 13 is fixedly embedded in the fourth fixing sleeve 12 of the measurement system. The first laser sensor 5 and the third laser sensor 11 are arranged opposite each other along the thickness direction of the sheet material to be measured, and are used to directly measure the distance between the upper and lower surfaces of the sheet material to be measured. The second laser sensor 7 and the fourth laser sensor 13 are also arranged opposite each other along the same direction. Their main function is to calibrate the distance between the first laser sensor 5 and the third laser sensor 11 in real time. When the sheet material to be measured passes between these four sets of laser sensors, the laser sensors can effectively sense the sheet material.

[0023] To ensure that the laser sensor remains perpendicular to the board surface during spacing adjustment, this invention designs a parallel rod structure. Specifically, a first parallel rod 8 is provided on one side of the first cross rod 2 along its length. One end of the first parallel rod 8 is rotatably connected to the mounting bracket 1 via a rotating shaft, and the other end is rotatably connected to the first fixed sleeve 4 via a rotating shaft. This connection method ensures that the first fixed sleeve 4 moves only in the translational direction during movement, thereby restricting the posture of the first laser sensor 5 and ensuring that its emission direction is always perpendicular to the theoretical board surface. Similarly, a second parallel rod 9 is provided on the other side of the first cross rod 2 along its length. One end of the second parallel rod 9 is rotatably connected to the mounting bracket 1 via a rotating shaft, and the other end is rotatably connected to the second fixed sleeve 6 via a rotating shaft, used to restrict the second fixed sleeve 6 to move only in the translational direction. Similarly, a third parallel rod 14 is provided on one side of the second cross rod 3 along the length direction. One end of the third parallel rod 14 is rotatably connected to the mounting frame 1 via a rotating shaft, and the other end is rotatably connected to the third fixed sleeve 10 via a rotating shaft. This is used to restrict the third fixed sleeve 10 to move only along the translation direction. On the other side of the second cross rod 3 along the length direction, a fourth parallel rod 15 is provided. One end of the fourth parallel rod 15 is rotatably connected to the mounting frame 1 via a rotating shaft, and the other end is rotatably connected to the fourth fixed sleeve 12 via a rotating shaft. This is used to restrict the fourth fixed sleeve 12 to move only along the translation direction. Through the parallelogram structure formed by these four sets of parallel rods and the corresponding cross rods and fixed sleeves, all laser sensors can keep their optical axes parallel and perpendicular to the transmission direction of the plate during the adjustment process, which greatly improves the accuracy of the measurement.

[0024] In a preferred embodiment, such as Figure 6As shown, the first parallel rod 8 and the first cross rod 2 of the measurement system are parallel to each other, and the length of the first parallel rod 8 is equal to the length from the common rotation axis between the first cross rod 2 and the second cross rod 3 to the rotation axis between the first cross rod 2 and the first fixed sleeve 4. This precise dimensional design ensures that the laser emission direction of the first laser sensor 5 inside the first fixed sleeve 4 remains perpendicular to the surface of the plate being measured during the translation process. Similarly, the second parallel rod 9 of the measurement system is parallel to the first cross rod 2, and the length of the second parallel rod 9 is equal to the length from the common rotation axis between the first cross rod 2 and the second cross rod 3 to the rotation axis between the first cross rod 2 and the second fixed sleeve 6, ensuring that the laser emission direction of the second laser sensor 7 remains perpendicular to the surface of the plate being measured during the translation process of the second fixed sleeve 6. Furthermore, the third parallel rod 14 of the measurement system is parallel to the second cross rod 3, and the length of the third parallel rod 14 is equal to the length of the first parallel rod 9. The length of the shared rotation axis between the second cross rod 3 and the first cross rod 2 is equal to the length of the rotation axis between the second cross rod 3 and the third fixed sleeve 10. This ensures that the laser emission direction of the third laser sensor 11 remains perpendicular to the surface of the plate being measured during the translation of the third fixed sleeve 10. Finally, the fourth parallel rod 15 of the measurement system is parallel to the second cross rod 3, and the length of the fourth parallel rod 15 is equal to the length of the shared rotation axis between the second cross rod 3 and the first cross rod 2 to the length of the rotation axis between the second cross rod 3 and the fourth fixed sleeve 12. This ensures that the laser emission direction of the fourth laser sensor 13 remains perpendicular to the surface of the plate being measured during the translation of the fourth fixed sleeve 12. By precisely designing the length and relative position of the parallel rods, this invention can ensure that all laser sensors always meet the perpendicular measurement conditions throughout the entire adjustment range, avoiding measurement errors caused by angular deviations and greatly improving the reliability of the measurement.

[0025] To achieve automated adjustment of the measurement interval, in a preferred embodiment, such as Figure 1 As shown, a stepper motor 16 is fixedly connected to one side of the measurement system mounting bracket 1 by bolts. The drive shaft of the stepper motor 16 is coaxially fixedly connected to the rotation shaft of the first cross rod 2 through a coupling, and the connection point coincides with the rotation shaft of the first cross rod 2. This is used to drive the first cross rod 2 to rotate around the rotation shaft. The stepper motor 16 can precisely control the rotation angle of the first cross rod 2, thereby precisely adjusting the distance between the first laser sensor 5 and the third laser sensor 11.

[0026] To achieve synchronous counter-rotation of the first crossbar 2 and the second crossbar 3, ensuring symmetrical adjustment of the sensor spacing and structural stability, in a preferred embodiment, such as... Figure 4As shown, the end of the second parallel rod 9 of the measurement system near the mounting bracket 1 is coaxially and fixedly connected to the first gear 17, and the end of the fourth parallel rod 15 of the measurement system near the mounting bracket 1 is coaxially and fixedly connected to the second gear 18. The gear ratio of the first gear 17 and the second gear 18 of the measurement system is 1:1 and they mesh with each other. The application of this gear transmission mechanism enables the second cross rod 3 to rotate synchronously in opposite directions with the first cross rod 2 by linking the second parallel rod 9 and the fourth parallel rod 15, as well as the meshing of the first gear 17 and the second gear 18, when the stepper motor 16 drives the first cross rod 2 to rotate. For example, when the first cross rod 2 rotates clockwise, the second cross rod 3 rotates counterclockwise, so that the sensors on both sides move closer to or further away from the center at the same time, realizing symmetrical spacing adjustment and ensuring the balance and stability of the measurement system.

[0027] To facilitate the installation, disassembly, and fine-tuning of the laser sensor, in a preferred embodiment, the side wall of the first fixing sleeve 4 of the measurement system has an internally threaded hole. A first fixing bolt 401 is threaded into the internal thread of this hole. The first fixing bolt 401 penetrates the side wall of the first fixing sleeve 4 and abuts against the outer wall of the first laser sensor 5. This structure allows the sensor to be fixed or released by tightening or loosening the bolt. The tightening method also allows for fine-tuning of the sensor's radial position. Similarly, the side wall of the second fixing sleeve 6 of the measurement system has an internally threaded hole. A second fixing bolt 601 is threaded into the internal thread of this hole. The second fixing bolt 601 penetrates the side wall of the second fixing sleeve 6 and abuts against the outer wall of the first laser sensor 5. The outer wall of the second laser sensor 7 and the side wall of the third fixing sleeve 10 of the measurement system have internal threaded holes. The internal thread of the internal threaded hole of the measurement system is fitted with a third fixing bolt 1001. The third fixing bolt 1001 of the measurement system passes through the side wall of the third fixing sleeve 10 and abuts against the outer wall of the third laser sensor 11. The side wall of the fourth fixing sleeve 12 of the measurement system has internal threaded holes. The internal thread of the internal threaded hole of the measurement system is fitted with a fourth fixing bolt 1201. The fourth fixing bolt 1201 of the measurement system passes through the side wall of the fourth fixing sleeve 12 and abuts against the outer wall of the fourth laser sensor 13. The design of these fixing bolts not only ensures the stable installation of the sensor in the fixing sleeve, but also provides convenience for sensor failure replacement or future upgrades.

[0028] To ensure the accuracy and consistency of the measurement direction, in a preferred embodiment, the lines connecting the first laser sensor 5 and the third laser sensor 11, as well as the lines connecting the second laser sensor 7 and the fourth laser sensor 13, are perpendicular to the transmission direction of the material under test, and the two lines are parallel to each other. This setting ensures that the measurement direction of both the main measurement sensor and the auxiliary measurement sensor is completely consistent with the thickness direction of the material, avoiding measurement errors caused by angular deviations, which is the basis for achieving high-precision measurement.

[0029] The present invention also provides a measurement system for an adjustable plate thickness intelligent measurement device, the system comprising: a drive control module, a data processing module, and a synchronization triggering module.

[0030] The measurement system drive control module includes a stepper motor controller and the stepper motor 16 of the measurement system. The stepper motor controller and the stepper motor 16 are electrically connected via pulse signal lines. The stepper motor controller is used to receive speed / angle control commands output by the data processing module and drive the stepper motor 16 to rotate the first crossbar 2, thereby adjusting the spacing between the measurement sensors.

[0031] The measurement system data processing module is the core intelligent part of this system. It includes a microcontroller and a parameter storage unit. The measurement system microcontroller is electrically connected to the first laser sensor 5, the second laser sensor 7, the third laser sensor 11, the fourth laser sensor 13, and the stepper motor controller via a communication bus. The measurement system parameter storage unit pre-stores the rotation axis position parameters of the first crossbar 2 and the second crossbar 3. These parameters are the basis for calculating the sensor spacing. The microcontroller has two built-in core algorithms: Spacing calibration algorithm: The measurement system calculates the real-time spacing between the first laser sensor 5 and the third laser sensor 11 based on the distance data collected by the second laser sensor 7 and the fourth laser sensor 13, combined with the pre-stored rotation axis position parameters. Since the second laser sensor 7 and the fourth laser sensor 13 are in a linkage mechanism with the first and third laser sensors, their distance changes have a definite geometric relationship with the distance changes between the first and third laser sensors. For example, when the rotation axis is at the midpoint, the spacing between them is equal; if it is not at the midpoint, there is a fixed proportional relationship. By measuring the distance between the second laser sensor 7 and the fourth laser sensor 13 in real time, the actual working spacing between the first sensor 5 and the third laser sensor 11 can be indirectly and accurately calibrated, overcoming the cumulative error that may be caused by mechanical movement.

[0032] Plate thickness calculation algorithm: The measurement system subtracts the sum of the distances from the sensors to the upper and lower surfaces of the plate from the real-time distance between the first laser sensor 5 and the third laser sensor 11 to obtain the real-time thickness value of the plate to be measured.

[0033] The measurement system's synchronous trigger module is electrically connected to the microcontroller and laser sensing module. Its function is to receive the synchronous trigger signal output by the microcontroller and drive the first laser sensor 5 and the third laser sensor 11 to emit lasers synchronously, and the second laser sensor 7 and the fourth laser sensor 13 to emit lasers synchronously. This high synchronization of emission is crucial, as it ensures that the distance data between the upper and lower surfaces of the board is collected at the same time. Thus, even if the board experiences vertical swaying during transmission, the instantaneous displacement of the board will cancel out the influence of the distance measurement value between the upper and lower surfaces because the upper and lower sensors measure simultaneously, thereby effectively eliminating the impact of board swaying on measurement accuracy.

[0034] When using this measuring device, firstly, the device is fixedly installed on one side of equipment such as a conveyor belt using the mounting bracket 1. Adjust the mounting bracket 1 so that it is perpendicular to the transmission direction of the plate to be measured, allowing the plate to pass between the four sets of laser sensors arranged opposite each other. In the main mode of measuring the plate thickness, the first laser sensor 5 and the third laser sensor 11 irradiate the upper and lower surfaces of the plate from the upper and lower sides respectively. What they actually measure is the distance from the sensor to the corresponding surface of the plate. Through the plate thickness calculation algorithm in the data processing module, the real-time thickness of the plate is obtained by subtracting the sum of the distance from the first laser sensor 5 to the upper surface of the plate and the distance from the third laser sensor 11 to the lower surface of the plate from the real-time distance between the calibrated first laser sensor 5 and the third laser sensor 11.

[0035] When measuring materials of different thicknesses, if the current sensor spacing exceeds its effective measurement range, the data processing module will send a command to the stepper motor controller to drive the stepper motor 16 to rotate. The stepper motor 16 drives the first cross rod 2 to rotate through the coupling. At the same time, through the meshing linkage of the first gear 17 and the second gear 18, the second cross rod 3 is driven to rotate synchronously in the opposite direction. During the rotation of the cross rod, the parallelogram structure formed by the parallel rods designed in this invention ensures that the laser sensors in the four sets of fixed sleeves always remain in a translational state, that is, the laser emission direction is always perpendicular to the surface of the material. The change in the sensor spacing enables the device to adapt to the measurement of materials with different thickness ranges.

[0036] During the spacing adjustment process, due to possible minor errors in mechanical motion, the actual spacing between the first laser sensor 5 and the third laser sensor 11 may deviate from the theoretical value. At this point, the roles of the second laser sensor 7 and the fourth laser sensor 13 become apparent. These two auxiliary sensors move along with the first and third sensors, and they form a structure with a definite geometric relationship to the spacing of the main measuring sensor. The spacing calibration algorithm in the data processing module uses the distance data collected by the second laser sensor 7 and the fourth laser sensor 13 in real time, combined with the pre-stored rotation axis position parameters, to calculate the current distance between the first laser sensor and the second laser sensor 5. The precise real-time distance between the first laser sensor 5 and the third laser sensor 11 is such that, for example, when the rotation axes of the first crossbar 2 and the second crossbar 3 are located at the midpoint of their respective lengths, the distance between the second laser sensor 7 and the fourth laser sensor 13 is equal to the distance between the first laser sensor 5 and the third laser sensor 11. Even if the rotation axis is not located at the midpoint, there is a fixed proportional relationship between these two distances, which is related to the position of the rotation axis on the crossbar. Through this real-time calibration mechanism, the second laser sensor 7 and the fourth laser sensor 13 provide a precise real-time calibration reference for the distance between the first laser sensor 5 and the third laser sensor 11.

[0037] The core advantage of this measurement system lies in the fact that it not only precisely adjusts the laser sensor spacing to adapt to different plate thicknesses through the stepper motor 16, but also ensures the perpendicularity of the laser emission direction through the parallel rod mechanism. More importantly, through the real-time calibration of the second laser sensor 7 and the fourth laser sensor 13, as well as the high-synchronization laser emission of the synchronous trigger module, this system solves the measurement accuracy problems caused by sensor spacing errors and plate sway in traditional measurements, ensuring that accurate and stable plate thickness data can be obtained under various working conditions.

[0038] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. An adjustable plate thickness intelligent measuring device, characterized in that, include: The mounting bracket has a first cross rod and a second cross rod rotatably connected to it. The first cross rod and the second cross rod are of equal length and rotate coaxially around the same rotation axis. The portions of the first cross rod and the second cross rod located on the same side of the rotation axis are of equal length. One end of the first crossbar is fixedly connected to a first fixing sleeve, and a first laser sensor is fixedly embedded in the first fixing sleeve; the other end of the first crossbar is fixedly connected to a second fixing sleeve, and a second laser sensor is fixedly embedded in the second fixing sleeve. A third fixing sleeve is fixedly connected to one end of the second cross rod, and a third laser sensor is fixedly embedded in the third fixing sleeve; a fourth fixing sleeve is fixedly connected to the other end of the second cross rod, and a fourth laser sensor is fixedly embedded in the fourth fixing sleeve. The first laser sensor and the third laser sensor are arranged opposite each other along the thickness direction of the plate to be measured, and the second laser sensor and the fourth laser sensor are arranged opposite each other along the same direction. The second laser sensor and the fourth laser sensor calibrate the actual measurement distance between the first laser sensor and the third laser sensor in real time. The first cross bar has a first parallel bar on one side along its length. One end of the first parallel bar is rotatably connected to the mounting bracket via a rotating shaft, and the other end is rotatably connected to the first fixed sleeve via a rotating shaft. A second parallel rod is provided on the other side of the first cross rod along the length direction. One end of the second parallel rod is rotatably connected to the mounting bracket through a rotating shaft, and the other end is rotatably connected to the second fixed sleeve through a rotating shaft. A third parallel rod is provided on one side of the second cross rod along its length. One end of the third parallel rod is rotatably connected to the mounting bracket via a rotating shaft, and the other end is rotatably connected to the third fixed sleeve via a rotating shaft. A fourth parallel rod is provided on the other side of the second cross rod along the length direction. One end of the fourth parallel rod is rotatably connected to the mounting bracket through a rotating shaft, and the other end is rotatably connected to the fourth fixed sleeve through a rotating shaft.

2. The adjustable plate thickness intelligent measuring device according to claim 1, characterized in that, The first parallel rod and the first intersecting rod are parallel to each other, and the length of the first parallel rod is equal to the length from the common rotation axis between the first intersecting rod and the second intersecting rod to the rotation axis between the first intersecting rod and the first fixed sleeve.

3. The adjustable plate thickness intelligent measuring device according to claim 1, characterized in that, The second parallel rod is parallel to the first intersecting rod, and the length of the second parallel rod is equal to the length from the common axis of rotation between the first intersecting rod and the second intersecting rod to the axis of rotation between the first intersecting rod and the second fixed sleeve.

4. The adjustable plate thickness intelligent measuring device according to claim 1, characterized in that, The third parallel rod is parallel to the second intersecting rod, and the length of the third parallel rod is equal to the length from the common rotation axis between the second intersecting rod and the first intersecting rod to the rotation axis between the second intersecting rod and the third fixed sleeve.

5. The adjustable plate thickness intelligent measuring device according to claim 1, characterized in that, The fourth parallel rod is parallel to the second cross rod, and the length of the fourth parallel rod is equal to the length from the common rotation axis between the second cross rod and the first cross rod to the rotation axis between the second cross rod and the fourth fixed sleeve.

6. The adjustable plate thickness intelligent measuring device according to claim 1, characterized in that, A stepper motor is fixedly connected to one side of the mounting bracket by bolts. The drive shaft of the stepper motor is coaxially fixedly connected to the rotation shaft of the first cross rod through a coupling, and the connection point coincides with the rotation shaft of the first cross rod.

7. The adjustable plate thickness intelligent measuring device according to claim 1, characterized in that, The second parallel rod is coaxially and fixedly connected to the first gear at one end near the mounting bracket, and the fourth parallel rod is coaxially and fixedly connected to the second gear at one end near the mounting bracket; the gear ratio of the first gear and the second gear is 1:1 and they mesh with each other.

8. The adjustable plate thickness intelligent measuring device according to claim 1, characterized in that, The side wall of the first fixing sleeve is provided with an internal threaded hole, and the internal thread of the internal threaded hole is engaged with a first fixing bolt. The first fixing bolt passes through the side wall of the first fixing sleeve and abuts against the outer wall of the first laser sensor. The side wall of the second fixing sleeve is provided with an internal threaded hole, and a second fixing bolt is engaged with the internal thread of the internal threaded hole. The second fixing bolt passes through the side wall of the second fixing sleeve and abuts against the outer wall of the second laser sensor. The side wall of the third fixing sleeve is provided with an internal threaded hole, and the internal thread of the internal threaded hole is fitted with a third fixing bolt. The third fixing bolt passes through the side wall of the third fixing sleeve and abuts against the outer wall of the third laser sensor. The side wall of the fourth fixing sleeve is provided with an internal threaded hole, and the internal thread of the internal threaded hole is fitted with a fourth fixing bolt. The fourth fixing bolt passes through the side wall of the fourth fixing sleeve and abuts against the outer wall of the fourth laser sensor.

9. The adjustable plate thickness intelligent measuring device according to claim 1, characterized in that, The connection between the first laser sensor and the third laser sensor, and the connection between the second laser sensor and the fourth laser sensor, are both perpendicular to the transmission direction of the test plate, and the two connections are parallel to each other.

10. The measurement system of the adjustable plate thickness intelligent measuring device according to any one of claims 1-9, characterized in that, include: Drive control module, data processing module and synchronous triggering module; The drive control module includes a stepper motor controller and a stepper motor. The stepper motor controller and the stepper motor are electrically connected via a pulse signal line. The controller is used to receive speed / angle control commands output by the data processing module and drive the stepper motor to rotate the first crossbar. The data processing module includes a microcontroller with a parameter storage unit; the microcontroller is electrically connected to the first laser sensor, the second laser sensor, the third laser sensor, the fourth laser sensor, and the stepper motor controller via a communication bus; the parameter storage unit pre-stores the rotation axis position parameters of the first and second crossbars; the microcontroller has two built-in core algorithms: Spacing calibration algorithm: Based on the distance data collected by the second and fourth laser sensors and combined with the pre-stored rotation axis position parameters, calculate the real-time spacing between the first and third laser sensors; Plate thickness calculation algorithm: Based on the real-time distance between the first laser sensor and the third laser sensor, subtract the sum of the distances from the sensors to the plate surface collected by the two sensors to obtain the real-time thickness value of the plate to be measured. The synchronous triggering module is electrically connected to the microcontroller and the laser sensing module. It is used to receive the synchronous triggering signal output by the microcontroller and drive the first laser sensor and the third laser sensor to emit lasers synchronously, and the second laser sensor and the fourth laser sensor to emit lasers synchronously, so as to ensure that the distance data between the upper and lower surfaces of the board is collected at the same time and to eliminate the influence of board shaking on the measurement accuracy.

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