Book parameter measuring method and device

Abstract

The invention belongs to the technical field of book processing, and particularly discloses a book parameter measuring method which comprises the following operation steps: S1, preliminarily measuring the length of a book moving in an assembly line; s2, according to the length measured in the step S1, the books are conveyed to the preset position of the assembly line and paused; s3, carrying out edge reduction adjustment on the books; s4, downward pressure is applied to the book after edge reduction; and S5, moving the position of the thickness measuring assembly to a middle measuring window after the book is pressed down, and measuring the thickness of the book in a pressed state. By means of the operation steps, high-precision book parameters are obtained, later book processing is facilitated, and the quality of printed marks or pasted labels is improved. The invention further discloses a book parameter measuring device.

Description

Technical Field

[0001] The present invention belongs to the technical field of book processing, and particularly relates to a method and device for measuring book parameters. Background Art

[0002] There are a large number of books in libraries or bookstores, and the recognition workload is quite large in the process of managing book warehousing, lending, and returning. If only relying on ISBN numbers or book names for recognition management, it is very easy to make mistakes. Therefore, in order to manage books more efficiently and conveniently, with the development of mechanical automation and intelligence, libraries usually use assembly line operations, and use robotic arms to print identifiers (such as library codes and stamps) or paste RFID tags on the relevant pages of each book. However, before the robotic arm performs these tasks, it needs to pre-understand the relevant size parameters of the book (such as length and thickness) to ensure accurate positioning during operation, so as to achieve good quality in the identification or tagging operation.

[0003] Currently, the technology for measuring the thickness parameter of books mainly uses an image recognition system, which is achieved by taking a photo of the book spine with a CCD camera. This system can directly calculate the number of pixels included between the graphic pulse widths to obtain the parameters of the book. However, there are problems with this method as follows: Since the book is in a free state on the assembly line, it is easy to cause size distortion due to loose pages or local bending, and the CCD camera is limited to two-dimensional imaging and is difficult to accurately measure the parameters of the book in a three-dimensional deformation state. The obtained book parameters are inaccurate, which in turn affects the positioning accuracy of the robotic arm, and may lead to abnormalities in printing identifiers or pasting tags. For example, if the position of the robotic arm is too high, the printed identifier may be unclear or incomplete, and the pasted tag is likely to fall off. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for measuring book parameters to obtain high-precision book measurement parameters, which is convenient for subsequent book processing, such as printing identifiers or pasting tags.

[0005] The purpose of the present invention is achieved through such a technical solution. Specifically, a method for measuring book parameters is provided, including the following operating steps:

[0006] S1. Initially measure the length of the book moving on the assembly line;

[0007] S2. According to the length measured in step S1, the book is transported to a predetermined position on the assembly line and paused;

[0008] S3. The edge-aligning component performs edge-aligning adjustment on the book;

[0009] S4. Use the downward pressing component with a measurement window to apply a downward pressure to the edge-aligned book;

[0010] S5. Move the thickness measurement component to the measurement window and measure the thickness of the book under pressure.

[0011] Preferably, it further includes step S6 of determining the book length by moving and measuring the change in the thickness parameter.

[0012] Preferably, the thickness measurement component sequentially measures the following height values H1, H2, H4, H6, and H7. Among them, H1 and H7 are the heights of the pipeline surface, H2 and H6 are the heights of the book surfaces on both sides of the measurement window, H4 is the height of the book surface at the measurement window. At the same time, the moving distance of the thickness measurement component to the junction of H1 and H2 is L1, and the moving distance to the junction of H6 and H7 is L2. The book length is L3 = L2 - L1.

[0013] Preferably, in step S3, the width measurement component determines the book width based on the moving distance of the edge-aligning component.

[0014] Preferably, the original distance between the width measurement component and the edge-aligning component is L4. The edge-aligning component moves towards the book and stops after adjusting the book. The moving distance L5 is measured by the width measurement component. The book width L6 = L4 - L5.

[0015] Preferably, in step S4, the pressure value applied to the book matches the preset pressure value when the robotic arm prints the identification or pastes the label on the book.

[0016] Preferably, the measurement window is a through measurement groove.

[0017] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0018] Through the edge alignment and adjustment of the book for positioning, the book is positioned horizontally. Under the action of the preset pressure, the pressing component positions the book vertically. The book eliminates deformation and the slack between the pages, improving the measurement accuracy of the book thickness parameter.

[0019] Another object of the present invention is to provide a book parameter measurement device, which improves the measurement accuracy of book parameters during the pipeline operation process.

[0020] The object of the present invention is achieved through such a technical solution. Specifically, a book parameter measurement device is provided, which is arranged in a pipeline and includes:

[0021] A thickness measurement component, slidably arranged above the pipeline;

[0022] A pressing component, arranged above the pipeline and provided with a measurement window for measuring thickness;

[0023] An edge-aligning component, arranged on the pipeline;

[0024] The edge-aligning component is used to align and adjust books for the pressing component to hold the books; the thickness measuring component is used to measure the thickness parameter of the books.

[0025] Preferably, the pressing component includes a pressing driving source and a pressing plate. The pressing plate is installed at the output end of the pressing driving source and is located above the edge-aligning component; the pressing plate includes an upper pressing plate, a lower pressing plate and a buffer structure. The upper pressing plate is connected to the output end of the pressing driving source, and the lower pressing plate is connected to the upper pressing plate through the buffer structure.

[0026] Preferably, it further includes a width measuring component. The width measuring component is arranged inside the assembly line and faces the moving direction of the edge-aligning component for edge alignment.

[0027] Due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0028] For the above-mentioned book parameter measuring device, first, the edge-aligning component restricts the movement of the book in the horizontal direction. The pressing component not only restricts the movement of the book in the vertical direction, but also makes the book flat by eliminating deformation, and the pages are compacted under extrusion, improving the measurement accuracy of book parameters, thereby improving the positioning accuracy of the robotic arm, and thus improving the quality of printed marks or pasted labels. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific embodiments of the present invention, the drawings required for the specific embodiments will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.

[0030] Figure 1 It is the step flow chart of a book parameter measuring method of the present invention;

[0031] Figure 2 It is the structural schematic diagram of a book parameter measuring device of the present invention;

[0032] Figure 3 It is the schematic diagram of the assembly line;

[0033] Figure 4 It is the structural schematic diagram of the pressing component;

[0034] Figure 5 It is the schematic diagram of the pressing plate;

[0035] Figure 6 It is the schematic diagram of the thickness measuring component;

[0036] Figure 7 It is the enlarged schematic diagram at A;

[0037] Figure 8 It is the structural schematic diagram of the edge-aligning component;

[0038] Figure 9It is a schematic diagram of the measurement of a laser displacement ranging sensor.

[0039] Reference numerals:

[0040] 1 - Conveyor line, 11 - Roller, 111 - Gap, 12 - Support frame, 13 - Synchronous belt, 14 - Servo motor, 15 - Mounting bracket;

[0041] 2 - Edge - aligning assembly, 21 - Fixed clamp, 22 - Movable clamp, 221 - Clamping seat, 222 - Clamping plate, 223 - Clamping strip, 23 - Edge - aligning drive assembly, 231 - Edge - aligning drive source, 232 - Transmission mechanism, 233 - Third pulley, 234 - Second belt, 235 - Fourth pulley; 236 - Second guide rail, 237 - Second slider;

[0042] 3 - Press - down assembly, 31 - Press - down drive source, 32 - Pressing plate, 321 - Adapter plate, 322 - Measurement window, 323 - Upper pressing plate, 324 - Lower pressing plate, 325 - Elastic member, 326 - Connecting column, 327 - Buffer structure, 33 - Guide structure, 331 - Guide seat, 332 - Guide rod, 333 - Guide hole;

[0043] 4 - Thickness measurement assembly, 41 - Thickness gauge, 411 - Measurement seat, 42 - Drive assembly, 421 - Measurement drive source, 422 - First pulley, 423 - Second pulley, 424 - First belt, 425 - First guide rail, 426 - First slider, 427 - First chute, 428 - First groove, 45 - First infrared measurement light curtain sensor, 46 - CCD camera;

[0044] 5 - Book, 6 - Width measurement assembly. Specific implementation mode

[0045] The embodiments of the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0046] Please refer to Figure 1 , a method for measuring book parameters, including the following operating steps:

[0047] S1. Initially measure the length of the book 5 moving on the conveyor line 1;

[0048] S2. According to the length measured in step S1, the book 5 is transported to a predetermined position on the conveyor line 1 and paused;

[0049] S3. The edge - aligning assembly 2 performs edge - aligning adjustment on the book 5;

[0050] S4. Use the press - down assembly 3 with the measurement window 322 to apply a downward pressure to the edge - aligned book 5;

[0051] S5. Move the thickness measurement component 4 to the measurement window 322 and measure the thickness of the book 5 under pressure.

[0052] Specifically, in steps S1 and S2, obtain the approximate length of the book 5, feedback the measured length information to the PLC controller, and the PLC controller calculates the staying position of the book 5 on the assembly line 1, i.e., the predetermined position, according to the length of the book 5, so that when pressing down, it presses on the middle of the length direction of the book 5 and matches the middle of the length direction of the measurement window 322, that is, the pressing-down component 3 can press down on the middle of books 5 with different length specifications. In step S3, through the edge-aligning adjustment of the book 5, align the spine or side edge of the book 5 with the reference of the edge-aligning component 2, correct the skew of the book 5, and restrict the movement of the book 5 in the horizontal direction, improving the accuracy of the position where it is pressed on the middle of the length direction of the book 5 when pressing down. In step S4, apply pressure in the vertical direction to position the book 5, eliminate the deformation of the book 5 and the slack between the pages, improve the thickness measurement accuracy of the book 5, and facilitate subsequent book processing, such as printing marks or pasting labels.

[0053] Further, it also includes step S6, that is, determine the length of the book 5 by moving and measuring the change of the thickness parameter. Specifically, move the thickness measurement component 4 to successively measure the following height values H1, H2, H4, H6, and H7 of the pressed book 5, where H1 and H7 are the heights of the surface of the assembly line 1, H2 and H6 are the heights of the surface of the book 5 on both sides of the measurement window 322, and H4 is the height of the surface of the book 5 at the measurement window 322. At the same time, the moving distance of the thickness measurement component 4 to the junction of H1 and H2 is L1, and the moving distance to the junction of H6 and H7 is L2, and the length of the book 5 is L3 = L2 - L1. After the edge-aligning adjustment of the book 5, the book 5 has no skew, and is positioned under pressure, eliminating the deformation of the book 5 and the slack between the pages. The thickness measurement of the book 5 is based on H4, thereby improving the measurement accuracy of the thickness and length of the book 5.

[0054] Further, in step S3, the width measurement component 6 determines the width of the book 5 through the moving distance of the edge-aligning component 2. Specifically, the original distance between the width measurement component 6 and the edge-aligning component 2 is L4. The edge-aligning component 2 moves towards the book 5, stops after adjusting the book 5, and measures the moving distance L5 through the width measurement component 6. The width of the book 5 is L6 = L4 - L5.

[0055] Furthermore, in step S4, the pressure value applied to the book 5 matches the preset pressure value applied to the book 5 when the robot arm prints the logo or sticks the label. Specifically, the pressure applied by the robot arm is obtained by a method a: for the same kind of book, the applied force of the previous operation is used; b: if it is a new book, the law of applied force is obtained by combining the number of pages of the book with a large amount of applied force data; c: if it is a new book, the thickness of the new book is measured with a height measuring instrument, and the closest book pressure in the comparison database is used as the applied force. A predetermined pressure is applied to the book 5 to simulate the working pressure of the robot arm when printing the logo or sticking the label on the book 5 as much as possible, so that the book 5 will not be over-squeezed due to high pressure or the pages will be loose due to low pressure, and the measurement accuracy of the thickness of the book 5 can be improved by coordinating the force application state with the positioning of the book 5.

[0056] In the above steps, the measured length, width and thickness value information is synchronously fed back to the PLC controller, and the PLC controller records, saves and processes the information.

[0057] Furthermore, the measuring window 322 runs through the measuring slot. Specifically, the measuring window 322 is located directly below the thickness measuring component 4 .

[0058] See also Figure 2 , Figure 3 and Figure 8 A book parameter measuring device of the present invention includes: an edge returning component 2, a pressing component 3 and a measuring component 4.

[0059] The thickness measuring component 4 is slidably arranged above the assembly line 1; the pressing component 3 is arranged above the assembly line 1 and is provided with a measuring window 322 for measuring the thickness; the edge returning component 2 is arranged on the assembly line 1; the edge returning component 2 is used for adjusting the edge of the book 5 so that the pressing component 3 can press the book 5; the thickness measuring component 4 is used for measuring the thickness parameters of the book 5. Specifically, in this embodiment, the assembly line 1 is a roller conveying mechanism of the prior art, the roller 11 is rotatably mounted on the support frame 12 on both sides of the top of the conveying frame through a roller bearing, and a gap 111 is formed between adjacent rollers 11. The rollers 11 are connected at the ends by a synchronous belt 13 for transmission, and the servo motor 14 is connected to the roller 11 for transmission through the synchronous belt 13. Under the drive of the servo motor 14, the roller 11 can rotate, thereby achieving the purpose of conveying the book 5. In the present invention, before being adjusted by the edge returning component 2, the book 5 may be skewed because it may be affected by vibration or other factors, so its length is preliminarily measured. The equipment for preliminarily measuring the length of the book 5 includes but is not limited to the following equipment or methods. For example, the device is an image recognition system of the prior art, and the image recognition system includes a CCD camera 46 and a controller. The CCD camera 46 is arranged at the front end of the assembly line 1 to take pictures of the book 5. The CCD camera 46 can directly count the number of pixels contained in the pulse width of the pattern to obtain the length of the book 5 and preliminarily obtain the length parameters of the book 5. The device for preliminarily measuring the length of the book 5 moving in the assembly line 1 can also use a first infrared measurement light curtain sensor 45. The first infrared measurement light curtain sensor 45 is installed above the junction of the assembly line 1 and the previous process, and is electrically connected to the PLC controller. It consists of a transmitter and a receiver. The transmitter emits an invisible infrared light beam to form a light curtain. When the object to be measured passes through the light curtain, it blocks the light beam, causing the receiver to detect the interruption of the light beam, thereby generating a signal. This signal is transmitted to the control and execution system to realize the detection and measurement of the object to be measured. When in use, the front end of the book 5 starts to block the light beam when passing through the light curtain until the rear end of the book 5 passes through the light curtain and the light beam is restored, thereby realizing Figure 5 Length measurement can also be calculated by multiplying the duration of occlusion and the transmission time. Figure 5 Length measurement. The device for preliminarily measuring the length of the book 5 moving in the assembly line 1 can also use a combination of sensors and encoders. When the book 5 passes through the sensor, the timing is triggered, and the length of the book 5 is calculated in combination with the assembly line speed recorded by the encoder. The length data of the book 5 is fed back to the PLC controller, and the PLC controller controls the assembly line 1 to move the book 5 to the predetermined position and pause accordingly, so that the pressing component 3 can press the book 5 as centered as possible, and the edge component 2 further adjusts the position and offset of the book 5 so that the spine or side of the book 5 is aligned with the reference of the edge component 2, so as to facilitate the pressing component 3 to press and the measuring component 4 to accurately measure the length and thickness.

[0060] A book parameter measuring device of the present invention places a book 5 on a production line 1. First, the length of the book 5 is preliminarily measured to obtain the middle position of the preliminary length, so as to control the production line 1 to move the middle of the length of the book 5 to directly below the middle of the measurement window 322 and pause, facilitating the pressing component 3 to press and hold the book 5 as centrally as possible. Then, the edge-aligning component 2 is started. The edge-aligning component 2 adjusts and restricts the position of the book 5 from the horizontal direction to prevent the book 5 from shifting or tilting during the process of the pressing component 3 pressing and holding the book 5 or due to the vibration of the equipment on the production line 1. Then, the pressing component 3 is started to press and hold the book 5. The force application direction of the pressing component 3 is perpendicular to the book 5 and cooperates with the surface of the production line 1 to restrict the movement of the book 5 from the vertical direction. Moreover, by using the pressure of the pressing component 3, the book 5 is flattened by eliminating deformation, and the pages are compacted under extrusion. Finally, the thickness measuring component 4 is started. The thickness measuring component 4 measures the length and thickness parameters of the book 5 during movement. Since the length and thickness parameters of the book 5 are measured in a pressed state, the measurement accuracy of the parameters of the book 5 can be improved. The pressing component 3 simulates the force applied when a robotic arm prints a mark or pastes a label on the book 5, improving the quality of printing the mark or pasting the label.

[0061] Further, please refer to Figure 6 、 Figure 7 and Figure 8 , the thickness measuring component 4 includes a thickness measuring instrument 41 and a driving component 42; the driving component 42 includes a measuring driving source 421, a first pulley 422, a second pulley 423 and a first belt 424. The measuring driving source 421 is installed at one end of the production line 1, the first pulley 422 is installed on the output shaft of the measuring driving source 421, the second pulley 423 is installed on the production line 1, and the first pulley 422 and the second pulley 423 are connected by the first belt 424. The thickness measuring instrument 41 is installed on the first belt 424. Specifically, the first pulley 422 and the second pulley 423 are arranged at intervals. Preferably, the first pulley 422 is arranged at the end of the production line 1, the second pulley 423 is arranged at the other end of the production line 1, and the lengths of the first pulley 422 and the second pulley 423 are sufficient to measure books 5 of different lengths. Preferably, the measuring driving source 421 is a motor.

[0062] In use, after the book 5 passes through the edge-aligning component 2 and the pressing-down component 3, the book 5 is positioned and pressed. The measurement driving source 421 is started, driving the first pulley 422 to rotate. Driven by the first belt 424, the second pulley 423 rotates synchronously. By starting the measurement driving source 421 forward or backward, the rotation direction of the first pulley 422 is opposite, and the first belt 424 reciprocates between the first pulley 422 and the second pulley 423. The thickness gauge 41 moves along with the movement of the first belt 424, thereby measuring the thickness of the book 5 and feeding back the thickness information to the PLC controller. Preferably, the thickness gauge 41 can be a laser displacement ranging sensor, and the model of the laser displacement ranging sensor is FSD22-100; it can also be a laser rangefinder, and the model of the laser rangefinder is LDM-80H. When above the book 5, the thickness of the book 5 is measured by the emitted laser; it can also be a second infrared measurement light curtain sensor, or other devices that can measure thickness or distance.

[0063] Furthermore, the driving component 42 further includes a first guide rail 425 and a first slider 426. The first guide rail 425 is installed on the assembly line 1, and the thickness gauge 41 is installed on the first slider 426. The first slider 426 moves along the first guide rail 425. Specifically, the first guide rail 425 is installed on the assembly line 1 along the length direction of the assembly line 1 by bolts. The first guide rail 425 is provided with a first chute 427, and the first slider 426 is provided with a first groove 428 that matches the outer shape of the first guide rail 425. The first slider 426 moves directionally and stably along the guide rail. The thickness gauge 41 further includes a measurement seat 411. One end of the measurement seat 411 is connected to the first slider 436 by bolts, and the other end of one side is connected to the first belt 424. The thickness gauge 41 is installed on the measurement seat 411.

[0064] Furthermore, please refer to Figure 4 and Figure 5, the pressing-down assembly 3 includes a pressing-down driving source 31 and a pressing plate 32. The pressing plate 32 is installed at the output end of the pressing-down driving source 31 and is located above the edge-returning assembly 2. The pressing plate 32 includes an upper pressing plate 323, a lower pressing plate 324 and a buffer structure 327. The upper pressing plate 323 is connected to the output end of the pressing-down driving source 31, and the lower pressing plate 324 is connected to the upper pressing plate 323 through the buffer structure 327. Specifically, the assembly line 1 is provided with a mounting bracket 15. The pressing-down driving source 31 is installed on the outer side of the mounting bracket 15 by bolts, and its output shaft is perpendicular to the assembly line 1. The pressing plate 32 is installed at the output end of the pressing-down driving source 31 through an adapter plate 321. The pressing plate 32 is parallel to the assembly line 1. The pressing-down driving source 31 drives the pressing plate 32 to apply a downward pressure to the book 5, making the book 5 flat and the pages compact, so as to improve the accuracy of measuring the thickness of the book 5. The buffer structure 327 includes an elastic member 325 and a connecting column 326. One end of the connecting column 326 is installed on the lower pressing plate 324, and the other end is sleeved in the upper pressing plate 323. The elastic member 325 is sleeved outside the connecting column 326, and both ends of the elastic member 325 are abutted against the upper pressing plate 323 and the lower pressing plate 324 respectively. The upper pressing plate 323 is provided with a plurality of through holes, and each through hole is slidably penetrated by a connecting column 326. A nut is threadedly connected to the top end of the connecting column 326, and the bottom end of the connecting column 326 is fixedly installed on the lower pressing plate 324 by welding. With the above structure, the buffer presses the acting force of the assembly 3 on the book 5, and gently applies the force to the book 5. During the measurement process, even if the book 5 is affected by vibration external force, under the action of the elastic member 325, it is always in pressure contact with the book 5, enhancing the accuracy of measuring the thickness of the book 5, and when it is affected by the pressure error of the pressing-down driving source 31, the buffer structure 327 can make up for the force applied to the book 5. Preferably, the elastic member 325 is a spring, and the number of the elastic members 325 is four, which are respectively arranged at the four corners of the lower pressing plate 324. The pressing-down driving source 31 is one of an electric push rod, a cylinder, a hydraulic cylinder, etc. By setting the output pressure of the pressing-down driving source 31 to be consistent with the pressure applied by the robotic arm obtained in advance, the book 5 is pressed and held.

[0065] Further, please refer to Figure 4 , a measurement window 322 is provided on the surface of the pressing plate 32 facing the edge-returning assembly 2. The measurement window 322 is arranged along the width direction of the pressing plate 32. When the thickness measuring instrument 41 passes by the pressing plate, the measurement window 322 is located directly below the thickness measuring instrument 41. Specifically, the measurement window 322 is a through measurement groove, and the shape of the through measurement groove is one of a U shape, an O shape, a square shape, etc. By providing the measurement window 322, the thickness measuring instrument 41 passes through the measurement window 322 and moves along the measurement window 322 to measure the thickness of the book 5, enhancing the accuracy of measuring the thickness of the book 5.

[0066] As Figure 9As shown in the figure, if a laser displacement ranging sensor is used, its structure mainly consists of a laser emitter, a receiver, a signal processing unit, an output interface, a display unit, etc. The laser emitter emits a beam of laser, which irradiates on the surface of the target object. After the laser is reflected by the object surface, it is received by the receiver. By measuring the time difference or phase difference between the laser emission and reception, the distance between the sensor and the target object can be calculated, which is often used to measure distance (length or thickness). In practical applications, the PLC controller is electrically connected to the laser displacement ranging sensor, and the PLC controller saves and processes the distance value. The pressing plate 32 presses the book 5, and the book 5 is relatively flat as a whole. The thickness measuring instrument 41 and the measuring drive source 421 are started, and the measuring drive source 421 drives the measuring instrument to move along the assembly line 1. When the laser irradiates the surface of the assembly line 1, the surface of the book 5, and the surface of the pressing plate 32, after each surface is reflected, the laser displacement ranging sensor will successively measure the following height values H1, H2, H3, H4, H5, H6, and H7. Among them, H1 and H7 are the heights of the surface of the assembly line 1, H2 and H6 are the heights of the surfaces of the book 5 on both sides of the pressing plate 32, H3 and H5 are the heights of the surface of the pressing plate 32, and H4 is the height of the surface of the book 5 at the measurement window 322. The thickness is measured based on the position of H4, and a relatively accurate thickness of the book 5 can be obtained. The thickness of the book 5 is directly obtained by the laser displacement ranging sensor and uploaded to the PLC controller, or the PLC controller calculates the values of H1 and H4 measured when the laser displacement ranging sensor moves. The difference between H4 and H1 is the thickness of the book 5. At the same time, when the thickness measuring instrument 41 reaches the junction of H1 and H2, the moving distance is L1, and when it reaches the junction of H6 and H7, the moving distance is L2. Thus, the length of the book 5 can be obtained as L3 = L2 - L1. The method of obtaining the value of L2 or L1 is as follows: a. The laser displacement ranging sensor pauses at the junction of H1 and H2 and the junction of H6 and H7. The rotation speed of the measuring drive source 421 is preset, that is, the moving speed v of the laser displacement ranging sensor is constant. By recording the time t1 passing through the junction of H1 and H2 and the time t2 passing through the junction of H6 and H7, L3 = t2 * v - t1 * v; or when the measuring drive source 421 is a motor, the number of rotation turns n1 passing through the junction of H1 and H2 and the number of rotation turns n2 passing through the junction of H6 and H7 are respectively recorded, and L3 = C * n2 - C * n1, where C is the circumference of the motor shaft. b. Taking an object on the assembly line 1 as a reference, the moving distance of the laser displacement ranging sensor when it reaches the junction of H1 and H2 is L1, and the moving distance when it reaches the junction of H1 and H2 is L2. The length of the book 5 can be obtained by using the difference in the moving distances, that is, L3 = L2 - L1.

[0067] When using the second infrared measurement light curtain sensor, when the light curtain cloth irradiates the surfaces of the assembly line, the book 5, and the pressing plate 32, when the light curtain is blocked or interrupted by each surface, the receiver cannot receive all or part of the optical signal, thereby generating a trigger signal. The length and thickness parameters of the book are obtained by detecting and analyzing the received different optical signals. Since the book 5 is adjusted by the edge-aligning assembly 2 and is held under pressure by the pressing assembly 3, a relatively accurate length of the book 5 can be obtained, and the thickness and length information are fed back to the PLC controller. The thickness and length are measured simultaneously, improving the measurement efficiency.

[0068] Further, the pressing assembly 3 further includes a guiding structure 33. The guiding structure 33 includes a guiding seat 331 and a guiding rod 332. The guiding seat 331 is provided with a guiding hole 333 and a working cavity penetrating through it. The pressing driving source 31 is installed in the working cavity, and its output end can extend and retract along the guiding seat 331; one end of the guiding rod 332 is connected to the pressing plate 32, and the other end slides in the guiding hole 333. Specifically, the guiding rod 332 is installed on the lower surface of the adapter plate 321 by welding, and the guiding rod 332 is parallel to the output shaft of the pressing driving source 31. Preferably, there are two groups of guiding rods 332. When in use, the output end of the pressing driving source 31 extends out or retracts from the guiding seat 331. With the cooperation of the guiding structure 33, the pressing plate 32 moves stably along a predetermined moving track, thereby applying a predetermined pressure to the book 5 or releasing the book 5.

[0069] Please refer to Figure 2 and Figure 8 , further, the edge-aligning assembly 2 includes a fixed clamp 21, a movable clamp 22, and an edge-aligning driving assembly 23. The fixed clamp 21 and the movable clamp 22 are installed on the opposite inner sides of the assembly line 1. The movable clamp 22 is connected to the output end of the edge-aligning driving assembly 23. The edge-aligning driving assembly 23 is installed on the assembly line. The edge-aligning driving assembly 23 drives the movable clamp 22 to approach or move away from the fixed clamp 21. Specifically, the edge-aligning assembly 2 is located below the pressing assembly 3. The edge-aligning assembly 2 can adopt a single-sided shaping plate in the patent application No. CN202022190172.3 and a single-sided shaping power mechanism for driving the single-sided shaping plate to move perpendicular to the conveying direction. The fixed clamp 21 and the movable clamp 22 are vertical stop bars or baffles arranged side by side along the conveying direction of the book 5. Preferably, both the fixed clamp 21 and the movable clamp 22 are provided with a clamping plate 222 and multiple clamping bars 223. The clamping plate 222 and the clamping bars 223 are integrally formed, and the clamping bars 223 are arranged in the gap 111 between adjacent rollers 11. The fixed clamp 21 is fixedly installed on the inner side of the assembly line 1 by bolts and serves as the reference for the edge alignment of the book 5.

[0070] Further, the edge-return driving assembly 23 includes an edge-return driving source 231 and a transmission mechanism 232. One end of the transmission mechanism 232 is installed at the output end of the edge-return driving source 231, and the other end is connected to the movable clamp 22. Preferably, the edge-return driving source 231 is an electric push rod, a pneumatic push rod, or a hydraulic push rod. The transmission mechanism 232 is a pulley mechanism or a sprocket mechanism. In one embodiment, the transmission mechanism 232 is a pulley mechanism, and the pulley mechanism includes a third pulley 233, a second belt 234, and a fourth pulley 235. The output shaft of the edge-return driving source 231 is connected to the third pulley 233, the fourth pulley 235 is connected to the third pulley 233 through the second belt 234, and the movable clamp 22 is installed on the second belt 234 and moves with the second belt 234. In other embodiments, it can also be a sprocket mechanism, and its principle is the same as that of the pulley mechanism. When in use, the edge-return driving source 231 is started to drive the third pulley 233 to rotate. Driven by the second belt 234, the fourth pulley 235 rotates synchronously. By starting the edge-return driving source 231 forward and backward, the second belt 234 reciprocates between the third pulley 233 and the fourth pulley 235, thereby driving the movable clamp 22 to approach or move away from the fixed clamp 21. When approaching, the book 5 is clamped.

[0071] Further, the edge-return driving assembly 23 further includes a second guide rail 236 and a second slider 237. The second guide rail 236 is installed on the assembly line 1, and the movable clamp 22 is installed on the second slider 237. The second slider 237 moves along the second guide rail 236. Specifically, the second guide rail 236 is installed on the assembly line 1 by bolts along the width direction of the assembly line 1, parallel to the output shaft of the edge-return driving source 231. The second guide rail 236 is provided with a second chute, and the second slider 237 is provided with a second groove matching the outer shape of the second guide rail 236. The second slider 237 moves directionally and stably along the second guide rail 236. The movable clamp 22 further includes a clamping seat 221. One end of the clamping seat 221 is connected to the second slider 237 by bolts, and the other end is connected to the second belt 234.

[0072] Further, it further includes a width measurement component 6, which is arranged inside the assembly line 1 and faces the moving direction of the edge-aligning component 2 for edge alignment. Specifically, the width measurement component 6 is a width measuring instrument, which is installed on the mounting bracket 15. Preferably, the width measuring instrument is a first photoelectric sensor. The measuring end of the first photoelectric sensor is slightly closer to the movable clamp 22 than the fixed clamp 21. The model of the first photoelectric sensor is E3ZG-T61, which is electrically connected to the PLC controller. The photoelectric sensor is based on the principle of the photoelectric effect and mainly consists of a light source, an optical path, and a light receiver. Its basic principle is to convert the optical signal into an electrical signal. In the optical path, the light emitted by the light source is reflected by the object, and the reflected light enters the light receiver. The light receiver converts the optical signal into an electrical signal for output to measure the distance of the object. When in use, the first photoelectric sensor irradiates the surface of the movable clamp 22, and the distance L4 from the movable clamp 22 to the first photoelectric sensor is recorded and uploaded by the PLC controller; the edge-aligning drive component 23 drives the movable clamp 22 to move towards the fixed clamp 21, stops after clamping the book 5, and the moving distance L5 can be measured by the first photoelectric sensor. By calculating the length L6 of the book 5 = L4 - L5, the width of the book 5 can be measured more accurately, and the width information is fed back to the PLC controller at the same time. Preferably, there are multiple groups of the first photoelectric sensors. In the embodiment, there are four groups, which measure the moving distance of the movable clamp 22 from above and below the assembly line 1 respectively, and evaluate and optimize the multiple groups of width measurement data, so as to obtain accurate width parameters of the book 5.

[0073] For a book parameter measurement method and a measurement device of the present invention, first, the edge-aligning component 2 restricts the movement of the book 5 in the horizontal direction, and at the same time, the width measurement component 6 measures the width of the book 5; the pressing component 3 restricts the movement of the book 5 in the vertical direction, and uses the pressure of the pressing component 3 to make the book 5 flat by eliminating deformation, and the pages are compacted by extrusion, simulating the thickness of the book 5 when the robotic arm stamps. The thickness measuring instrument 41 measures the thickness of the pressed book 5, and at the same time measures the length parameter by moving to measure the change of the thickness parameter, so as to improve the measurement accuracy of the thickness of the book 5 and improve the quality of printed markings or pasted labels. A measurement window 322 is set, and the thickness measuring instrument 41 moves along the measurement window 322 to measure the thickness of the book 5, enhancing the accuracy of measuring the thickness of the book 5. A buffer structure 327 is provided on the pressing plate 32, and the pressing plate 32 is not affected by external forces such as vibration and always presses against the book 5, enhancing the accuracy of measuring the thickness of the book 5. The transmission mechanisms of the edge-aligning component 2 and the measurement component 4 cooperate with the guide rails and sliders to assist in enhancing the accuracy of measuring the parameters of the book 5.

[0074] The specific embodiments described above further elaborate on the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only for the specific implementation methods of the present invention and is not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the gist of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for measuring book parameters, characterized in that: The following steps are included: S1. Preliminary measurement of the length of the book (5) moving in the assembly line (1); S2. According to the length measured in step S1, the book (5) is transported to the assembly line (1) and paused at a predetermined position; S3. The edge component 2 adjusts the edge of the book (5); S4. Apply downward pressure to the book (5) after the edge is returned by using a pressing component (3) with a measuring window (322); S5. Move the thickness measuring component (4) to the measuring window (322) to measure the thickness of the book (5) under pressure.

2. The book parameter measurement method according to claim 1, characterized in that: The method further comprises step S6 of determining the length of the book (5) by moving and measuring the change of the thickness parameter.

3. The book parameter measurement method according to claim 2, characterized in that: The mobile thickness measuring component (4) measures the following height values ​​H1, H2, H4, H6 and H7 in sequence, wherein H1 and H7 are the heights of the surface of the production line (1), H2 and H6 are the heights of the surface of the book (5) on both sides of the measuring window (322), and H4 is the height of the surface of the book (5) at the measuring window (322). During this process, the moving distance of the thickness measuring component (4) to the junction of H1 and H2 is L1, and the moving distance to the junction of H6 and H7 is L2. The length of the book (5) is L3 = L2-L1.

4. The method for measuring book parameters according to any one of claims 1 to 3, characterized in that: In step S3, the width measuring component (6) determines the width of the book (5) by the moving distance of the edge returning component (2).

5. The book parameter measurement method according to claim 4, characterized in that: The original distance between the width measuring component (6) and the edge returning component (2) is L4. The edge returning component (2) moves toward the book (5). After the book (5) is adjusted, the edge returning component (2) stops. The moving distance L5 is measured by the width measuring component (6). The width of the book (5) is L6 = L4-L5.

6. The book parameter measurement method according to claim 1, 2, 3 or 5, characterized in that: In step S4, the pressure value applied to the book (5) matches the preset pressure value applied to the book (5) when the robot arm prints a logo or affixes a label.

7. The book parameter measurement method according to claim 1, 2, 3 or 5, characterized in that: The measuring window (322) is a through-going measuring slot.

8. The book parameter measuring device according to the book parameter measuring method according to any one of claims 1 to 7 is arranged in an assembly line (1), characterized in that: include: A thickness measuring assembly (4) is slidably disposed above the assembly line (1); A pressing assembly (3) is arranged above the assembly line (1) and is provided with a measuring window (322) for measuring thickness; The edge return component (2) is arranged on the assembly line (1); The edge trimming component (2) is used for adjusting the edge trimming of the book (5) so that the pressing component (3) can press and hold the book (5); and the thickness measuring component (4) is used for measuring the thickness parameters of the book (5).

9. The book parameter measuring device according to claim 8, characterized in that: The pressing assembly (3) comprises a pressing drive source (31) and a pressing plate (32), wherein the pressing plate (32) is installed at the output end of the pressing drive source (31) and is located above the edge returning assembly (2); the pressing plate (32) comprises an upper pressing plate (323), a lower pressing plate (324) and a buffer structure (327), wherein the upper pressing plate (323) is connected to the output end of the pressing drive source (31), and the lower pressing plate (324) is connected to the upper pressing plate (323) via the buffer structure (327).

10. The book parameter measuring device according to claim 8 or 9, characterized in that: It also comprises a width measuring component (6), which is arranged on the inner side of the assembly line (1) and moves towards the edge returning direction of the edge returning component (2).

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