Imprinted line detection equipment and detection method

Abstract

The invention discloses engraved line detection equipment and a detection method, and relates to the technical field of detection equipment. The engraved line detection equipment is used for detecting engraved lines on the surface of a to-be-detected piece and comprises a detection table, a mobile platform, a three-dimensional laser scanner, an auxiliary positioning device and a host. The detection table is used for placing a to-be-detected piece; the mobile platform is mounted on the detection table and is used for driving the three-dimensional laser scanner and the auxiliary positioning device to move; the three-dimensional laser scanner is used for scanning the engraved lines and forming three-dimensional contour data; the auxiliary positioning device is used for acquiring position information of the to-be-tested piece; the mobile platform, the three-dimensional laser scanner, the driving motor and the laser sensor are all in communication connection with the host, and the host can process position information and three-dimensional contour data. The to-be-detected piece is calibrated through the auxiliary positioning device, and the three-dimensional contour information of the engraved lines is automatically acquired by using the three-dimensional laser scanner, so that the detection efficiency is improved, and the defect of inaccurate manual detection value is overcome.

Description

Technical Field

[0001] The present invention relates to the technical field of detection devices, and particularly to an engraving texture detection device and a detection method. Background Art

[0002] For the engraving texture on the sheet metal parts in a vehicle, taking the child lock as an example, after the child lock texture is engraved on the sheet metal part and undergoes surface treatment, it is necessary to detect whether the engraving depth of the child lock texture meets the design requirements. Usually, the detector will hold a detection device such as a micrometer to measure the depth of each part of the child lock texture one by one, and record the test data in a computer or a paper file. This detection method takes a long time, and the tip of the micrometer may not be able to fully extend to the bottom of the engraving texture, so the specific depth value of the engraving texture cannot be accurately obtained.

[0003] In view of this, the present invention provides an engraving texture detection device and a detection method to solve or at least alleviate the above technical problems. Summary of the Invention

[0004] The main object of the present invention is to propose an engraving texture detection device and a detection method, aiming to solve the technical problems of long time consumption and inaccurate detection values in the process of detecting the quality of engraving textures.

[0005] To achieve the above object, the engraving texture detection device proposed by the present invention is used to detect the engraving texture on the surface of a test piece, and includes:

[0006] A detection table for placing the test piece;

[0007] A moving platform installed on the detection table;

[0008] A three-dimensional laser scanner installed on the moving platform. The moving platform can drive the three-dimensional laser scanner to perform three-axis movement, and the three-dimensional laser scanner is used to scan the engraving texture and form three-dimensional contour data;

[0009] An auxiliary positioning device, including a mounting bracket, a driving motor, a connecting member and a laser sensor. The driving motor is installed on the moving platform through the mounting bracket. The connecting member is installed on the output shaft of the driving motor. The laser sensor is installed on the connecting member. The driving motor is used to drive the laser sensor to rotate in a plane parallel to the top surface of the detection table through the connecting member, and the laser sensor is used to detect the position information of the test piece;

[0010] A host computer. The moving platform, the three-dimensional laser scanner, the driving motor and the laser sensor are all communicatively connected to the host computer, and the host computer can process the position information and the three-dimensional contour data.

[0011] In one embodiment, the three-dimensional laser scanner includes a laser head, an optical lens group, and an imaging unit. The laser head and the optical lens group both face the detection table. The laser head and the optical lens group are spaced apart. The imaging unit is spaced apart on a side of the optical lens group away from the detection table. The imaging unit includes an imaging surface facing the optical lens. The focal point of the optical lens group is set on the imaging surface. The line connecting the laser head and the optical lens group is parallel to the imaging surface;

[0012] The laser head is used to emit laser light towards the engraved pattern. After being reflected by the engraved pattern, the laser light is directed towards the optical lens group and is projected onto the imaging surface under the transmission of the optical lens group.

[0013] In one embodiment, the detection table includes a base and a carrier plate disposed on top of the base. The moving platform is mounted on the carrier plate, and the carrier plate is used to place the workpiece to be measured. The base is provided with at least one electrical cavity, and the main unit is accommodated in the electrical cavity.

[0014] In one embodiment, the detection table further includes at least two positioning members. At least two of the positioning members are spaced apart and mounted on the carrier plate. The positioning members are used to position the workpiece to be measured.

[0015] In one embodiment, the positioning member includes a magnetic base and a positioning shaft. The magnetic base is used to adsorb on the surface of the carrier plate. The positioning shaft is mounted on a side of the magnetic base away from the carrier plate. The magnetic base includes a magnetic switch, and the magnetic switch is used to control the magnitude of the magnetic force between the magnetic base and the carrier plate.

[0016] In one embodiment, the engraved pattern detection device further includes a protective cover. The protective cover covers the moving platform. A receiving cavity is formed by enclosing between the protective cover and the carrier plate. An opening is provided on a side surface of the protective cover, and a part of the workpiece to be measured can extend into the receiving cavity through the opening.

[0017] In one embodiment, the engraved pattern detection device further includes a safety light curtain. The safety light curtain includes a transmitter and a receiver. The transmitter and the receiver are respectively mounted on two sides of the opening. The transmitter is used to emit a light beam, and the receiver is used to receive the light beam. Both the transmitter and the receiver are communicatively connected to the main unit.

[0018] In one embodiment, the moving platform includes an X-axis drive assembly, a Y-axis drive assembly, a Z-axis drive assembly, a fixed platform, and a plurality of sliders;

[0019] The three-dimensional laser scanner and the mounting bracket are both mounted on the fixed platform. The fixed platform is mounted on the Z-axis drive assembly through the slider and moves vertically under the drive of the Z-axis drive assembly;

[0020] The Z-axis drive assembly is mounted on the Y-axis drive assembly through the slider and moves horizontally in the Y direction under the drive of the Y-axis drive assembly;

[0021] The Y-axis drive assembly is mounted on the X-axis drive assembly through the slider and moves horizontally in the X direction under the drive of the X-axis drive assembly;

[0022] The X-axis drive assembly is mounted on the top surface of the inspection table.

[0023] The present invention also provides an engraving pattern detection method, which is applied to the engraving pattern detection device as described in any one of the above embodiments. The engraving pattern detection method includes:

[0024] Select a preset detection program in the host according to the type of the workpiece to be measured;

[0025] The host controls the moving platform to drive the three-dimensional laser scanner and the auxiliary positioning device to move to the detection position;

[0026] The host controls the drive motor to drive the laser sensor to rotate to a preset position. The laser sensor detects the position information of the workpiece to be measured and sends the position information to the host;

[0027] The host processes the position information to judge whether the installation position of the workpiece to be measured is accurate;

[0028] If the installation position of the workpiece to be measured is accurate, the host controls the three-dimensional laser scanner to scan the engraving pattern, obtains the three-dimensional contour data of the engraving pattern, and sends the three-dimensional contour data to the host;

[0029] The host analyzes and processes the three-dimensional contour data to obtain the depth values of each part of the engraving pattern.

[0030] In one embodiment, the engraving pattern detection method further includes:

[0031] Compare the depth values with the preset values in the host to evaluate the engraving quality of the engraving pattern and form a detection report according to the comparison results.

[0032] According to the technical solution provided by the present invention, the engraving pattern detection device is used to detect the engraving pattern on the surface of a workpiece to be measured, and includes a detection table, a moving platform, a three-dimensional laser scanner, an auxiliary positioning device, and a host computer. Among them, the detection table is used to place the workpiece to be measured; the moving platform is installed on the detection table; the three-dimensional laser scanner is installed on the moving platform, and the moving platform can drive the three-dimensional laser scanner to perform three-axis movement. The three-dimensional laser scanner is used to scan the engraving pattern and form three-dimensional contour data; the auxiliary positioning device includes a mounting frame, a driving motor, a connecting member, and a laser sensor. The driving motor is installed on the moving platform through the mounting frame, the connecting member is installed on the output shaft of the driving motor, and the laser sensor is installed on the connecting member. The driving motor is used to drive the laser sensor to rotate in a plane parallel to the top surface of the detection table through the connecting member, and the laser sensor is used to detect the position information of the workpiece to be measured; the moving platform, the three-dimensional laser scanner, the driving motor, and the laser sensor are all communicatively connected to the host computer, and the host computer can process the position information and the three-dimensional contour data. Through this setting, after the workpiece to be measured is placed on the detection table, the moving platform can automatically drive the three-dimensional laser scanner and the auxiliary positioning device to enter the detection position under the control of the host computer. The laser sensor can cooperate with the host computer to detect whether the installation of the workpiece to be measured is accurate. After the installation position of the workpiece to be measured is correct, the host computer can control the three-dimensional laser scanner to automatically scan the engraving pattern. After the host computer analyzes the scanning result, it can automatically give a quality inspection report on the engraving pattern of the workpiece to be measured. In this way, there is no need to manually detect each part of the engraving pattern one by one, thereby improving the detection efficiency; and the three-dimensional contour data of the engraving pattern obtained by using the three-dimensional laser scanning method is more accurate, overcoming the defect of inaccurate manual detection values. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0034] Figure 1 FIG. is a schematic structural diagram of an embodiment of the engraving pattern detection device provided by the present invention;

[0035] Figure 2 is Figure 1 a front structural diagram of the engraving pattern detection device provided in;

[0036] Figure 3 is Figure 1 a partial structural diagram of the engraving pattern detection device provided in;

[0037] Figure 4This is the working principle diagram of the 3D laser scanner provided by the present invention;

[0038] Figure 5 This is the schematic flow diagram of the engraving pattern detection method provided by the present invention.

[0039] Explanation of the reference numerals in the attached drawings:

[0040] 100, engraving pattern detection device;

[0041] 1, detection table; 11, base; 12, bearing plate; 13, positioning member; 131, magnetic base; 132, positioning shaft;

[0042] 2, moving platform; 21, X-axis driving assembly; 22, Y-axis driving assembly; 23, Z-axis driving assembly; 24, fixed platform;

[0043] 3, 3D laser scanner; 31, laser head; 32, optical lens group; 33, imaging unit; 331, imaging surface;

[0044] 4, auxiliary positioning device; 41, mounting bracket; 42, driving motor; 43, connecting member; 44, laser sensor;

[0045] 5, protective cover; 51, accommodating cavity;

[0046] 6, safety grating;

[0047] 7, display screen;

[0048] 200, workpiece to be measured.

[0049] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0050] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0051] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0052] In addition, if the descriptions such as "first" and "second" are involved in the embodiments of the present invention, these descriptions of "first", "second", etc. are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0053] In some sheet metal parts of a vehicle, various functional patterns need to be engraved. Taking the child lock pattern as an example, the design of the child lock pattern aims to prevent children from accidentally operating through a specific shape and depth, ensuring the safety of children in the vehicle. After the child lock pattern is engraved on the surface of the sheet metal part, subsequent surface treatment processes, such as painting and electroplating, are required to improve the corrosion resistance and aesthetics of the sheet metal part. After the surface treatment is completed, it is necessary to detect whether the depth of the child lock pattern meets the design requirements. In the traditional detection mode, the detection personnel usually need to hold a professional detection device such as a micrometer to measure the depth of each part of the child lock pattern one by one, read the corresponding depth value, and then accurately record the test data in a computer system or a paper document for subsequent data analysis and traceability.

[0054] However, according to the applicant's observation and research, when using detection tools such as micrometers for manual detection, from the perspective of detection efficiency, the entire detection process takes a long time. Since the child lock pattern usually has a complex shape and a certain length, the detection personnel need to carefully measure each key position along the direction of the pattern. The determination of each measurement point, the calibration and operation of the micrometer, and the reading and recording of data all require a lot of time and energy. In addition, from the perspective of detection accuracy, when the tip of the micrometer extends into the bottom of the engraved pattern, it is often interfered by many factors. On the one hand, due to problems such as irregular shape of the engraved pattern, it is difficult for the tip of the micrometer to fully fit the bottom of the pattern, resulting in deviation of the measurement result. On the other hand, some patterns have a relatively deep depth and a narrow space, and the tip of the micrometer cannot smoothly extend to the bottom of the pattern, making the measured value unable to truly reflect the actual depth of the pattern. Therefore, the traditional detection method has the problems of long time consumption and inaccurate detection results.

[0055] In view of this, the present invention proposes a detection device for engraved patterns to solve the above technical problems.

[0056] See also Figures 1 to 3 In one embodiment of the present invention, the engraved pattern detection device 100 is used to detect the engraved pattern on the surface of the test piece 200, including a detection table 1, a mobile platform 2, a three-dimensional laser scanner 3, an auxiliary positioning device 4 and a host, wherein the detection table 1 is used to place the test piece 200; the mobile platform 2 is installed on the detection table 1; the three-dimensional laser scanner 3 is installed on the mobile platform 2, the mobile platform 2 can drive the three-axis laser scanner 3 to perform three-axis movement, and the three-dimensional laser scanner 3 is used to scan the engraved pattern and form three-dimensional contour data; the auxiliary positioning device 4 includes a mounting frame 41, a drive motor 4 2. Connecting piece 43 and laser sensor 44. The driving motor 42 is installed on the mobile platform 2 through the mounting frame 41. The connecting piece 43 is installed on the output shaft of the driving motor 42. The laser sensor 44 is installed on the connecting piece 43. The driving motor 42 is used to drive the laser sensor 44 to rotate in a plane parallel to the top surface of the detection platform 1 through the connecting piece 43. The laser sensor 44 is used to detect the position information of the test piece 200. The mobile platform 2, the three-dimensional laser scanner 3, the driving motor 42 and the laser sensor 44 are all connected to the host for communication, and the host can process the position information and three-dimensional contour data.

[0057] Specifically, the mobile platform 2 includes one of a three-axis robot and a three-axis slide, and the mobile platform 2 can drive the three-dimensional laser scanner 3 and the auxiliary positioning device 4 to perform three-axis motion in the three directions of X, Y, and Z. The host includes at least a processor and a controller, the processor is used to process position information and three-dimensional contour data, and the controller is used to control the working state of the mobile platform 2, the three-dimensional laser scanner 3, the drive motor 42, and the laser sensor 44.

[0058] Among them, the laser sensor 44 is used to detect the position information of the test piece 200. Specifically, in this embodiment, the test piece 200 is a sheet metal with a pattern. There are many types of sheet metal. The position information detected by the laser sensor 44 includes two situations. In one case, the sheet metal is affixed with an information code such as a digital code or a two-dimensional code. The laser sensor 44 is used to scan the information code. When the laser sensor 44 can successfully scan the information code, it means that the position of the sheet metal has been accurately placed. At this time, the three-dimensional laser scanner 3 can be started; if the laser sensor 44 cannot scan the information code, it means that the sheet metal is not placed in place at this time, and the position needs to be adjusted. In another case, the laser sensor 44 is used to detect the distance between it and the surface of the sheet metal. The host is preset with the distance value between each sheet metal after being placed on the detection table 1 and the laser sensor 44. The laser sensor 44 detects the actual distance between it and the sheet metal and transmits the actual distance value to the host. The host compares the actual distance value with the preset distance value to determine whether the placement position of the sheet metal is accurate.

[0059] Since there are multiple types of sheet metal parts, multiple detection programs are preset in the host computer. Each detection program corresponds to the detection process of a type of sheet metal part. The preset detection program can control the moving platform 2 to drive the 3D laser scanner 3 to move to the preset detection position, and at the same time can control the driving motor 42 to drive the laser sensor 44 to rotate to the preset angle to adapt to the detection of the engraved patterns on the surfaces of different types of sheet metal parts.

[0060] According to the technical solution provided by the present invention, after the workpiece 200 to be tested is placed on the detection table 1, the moving platform 2 can automatically drive the 3D laser scanner 3 and the auxiliary positioning device 4 into the detection position under the control of the host computer. The laser sensor 44 can cooperate with the host computer to detect whether the installation position of the workpiece 200 is accurate. After the installation position of the workpiece 200 is correct, the host computer can control the 3D laser scanner 3 to automatically scan the engraved pattern. After the host computer analyzes the scanning result, it can automatically give a quality inspection report on the engraved pattern of the workpiece 200. In this way, there is no need to manually detect each part of the engraved pattern one by one, thereby improving the detection efficiency; and the 3D contour data of the engraved pattern obtained by using the 3D laser scanning method is more accurate, overcoming the defect of inaccurate manual detection values.

[0061] Please refer to Figure 4 , in an embodiment of the present invention, the 3D laser scanner 3 includes a laser head 31, an optical lens group 32 and an imaging unit 33. The laser head 31 and the optical lens group 32 both face the detection table 1. The laser head 31 and the optical lens group 32 are spaced apart. The imaging unit 33 is spaced on the side of the optical lens group 32 away from the detection table 1. The imaging unit 33 includes an imaging surface 331 facing the optical lens. The focal point of the optical lens group 32 is set on the imaging surface 331. The connection line between the laser head 31 and the optical lens group 32 is parallel to the imaging surface 331; the laser head 31 is used to emit laser light towards the engraved pattern. The laser light is reflected by the engraved pattern and then shoots towards the optical lens group 32, and is projected onto the imaging surface 331 under the transmission action of the optical lens group 32.

[0062] In this embodiment, the principle of the 3D laser scanner 3 obtaining the 3D contour data of the engraved pattern and the principle of the host computer obtaining the depth value of the engraved pattern through the 3D contour data are described. Please refer to Figure 4, for ease of explanation, denote the laser emission point of the laser head 31 as A, a certain detection point of the engraved pattern as B, the refraction point of the optical lens group 32 as C, the imaging point after the laser projected by the optical lens group 32 falls on the imaging surface 331 as p, o as the focal point of the optical lens group 32, set a point p' in the imaging surface 331 such that p'c is parallel to AB. Denote the length of the line segment where B is perpendicular to AC as q, the length of the line segment AC as s, the length of the line segment AB as d, the length of the line segment Co as f, the length of the line segment p'o as m, the length of the line segment op as n, and ∠CAB as θ. Since AC is parallel to p'p, AB is parallel to p'C, and BC and Cp are collinear, then △ABC is similar to △p'Cp. Therefore, there is q = f·s / (m + n). Further, m = f / tanθ, n = pixelSize·position. Where pixelSize is the size of a unit pixel, position is the position of the imaging point relative to the imaging center, the specific value of n can be automatically obtained in the 3D laser scanner 3, f is the focal length of the optical lens group 32, s is the distance between the laser head 31 and the optical lens group 32, and θ is the angle between the laser head 31 and AC. Thus, θ, n, f, and s are all known. In this way, the specific value of q can be obtained, and then d = q / sinθ can be obtained. Summarize the values of d at each detection point of the engraved pattern, and the 3D contour data of the engraved pattern can be obtained. The larger the d of a certain engraved pattern, the deeper the depth of the engraved pattern at that place. Subsequently, the 3D laser scanner 3 transmits the obtained 3D contour data to the host computer. The distance between the laser head 31 and the surface of the engraved pattern is preset in the host computer, and denote this distance as L. Then the depth value of the engraved pattern at a certain detection point is (d - L). Finally, it is judged whether the engraved pattern meets the design requirements according to this depth value.

[0063] Please refer to Figure 1 , in this embodiment, the engraved pattern detection device 100 is further provided with a display screen 7. After the 3D contour data is processed by an algorithm, it can be intuitively presented in the form of a graph on the display screen 7, so that the detection personnel can intuitively judge whether the engraved pattern meets the design requirements. At the same time, the depth values of each part of the engraved pattern processed by the host computer will also be presented in the form of a chart on the display screen 7 for the reference of the detection personnel.

[0064] In an embodiment of the present invention, please refer to Figure 1, the detection table 1 includes a base 11 and a carrier plate 12 disposed on the top of the base 11. The moving platform 2 is installed on the carrier plate 12, and the carrier plate 12 is used to place the workpiece to be tested 200. The base 11 is provided with at least one electrical cavity, and the main unit is accommodated in the electrical cavity. The base 11 is disposed on a planar structure such as the ground or the top surface of the floor slab. The base 11 is used to support the carrier plate 12. The moving platform 2 is installed on the top surface of the carrier plate 12, and the carrier plate 12 is used as the detection platform for the workpiece to be tested 200. In this embodiment, the electrical cavity of the base 11 integrates the main unit and other electrical components into a unified space, forming a functional partition with the top carrier plate 12, making the overall structure more compact. The structure of the electrical cavity can effectively block dust and reduce the degree of dust intrusion on the main unit.

[0065] Further, in an embodiment of the present invention, please refer to Figure 3 , the detection table 1 further includes at least two positioning members 13. The at least two positioning members 13 are spaced apart and installed on the carrier plate 12. The positioning members 13 are used to position the workpiece to be tested 200. Through this setting, the translational and rotational degrees of freedom of the workpiece to be tested 200 can be restricted simultaneously, ensuring that its installation position on the carrier plate 12 is more accurate and preventing it from sliding due to its own weight. In each type of workpiece to be tested 200, a positioning groove or a positioning hole cooperating with the positioning member 13 is provided to facilitate accurate positioning of the workpiece to be tested 200.

[0066] It should be noted that in order to adapt to different types of workpieces to be tested 200, the positions of the positioning members 13 can be changed according to the types of the workpieces to be tested 200. Specifically, in an embodiment of the present invention, please refer to Figure 3 , the positioning member 13 includes a magnetic base 131 and a positioning shaft 132. The magnetic base 131 is used to adsorb on the surface of the carrier plate 12. The positioning shaft 132 is installed on the side of the magnetic base 131 away from the carrier plate 12. The magnetic base 131 includes a magnetic switch, and the magnetic switch is used to control the magnitude of the magnetic force between the magnetic base 131 and the carrier plate 12. Among them, the magnetic base 131 includes one of a standard magnetic base 131 and a strong magnetic base 131. A threaded hole is provided at the top of the magnetic base 131, and the positioning shaft 132 can be threadedly engaged with the magnetic base 131 through the threaded hole, so as to facilitate the replacement of positioning shafts 132 with different lengths and diameters. By adjusting the magnetic switch, the magnetic base 131 can be adsorbed on the surface of the carrier plate 12 or can be removed from the carrier plate 12 to facilitate the adjustment of the position of the magnetic base 131. Through this setting, it is not only convenient to adjust the position of the magnetic base 131 but also convenient to adjust the type of the positioning shaft 132, so as to meet the placement requirements of different types of workpieces to be tested 200.

[0067] Please refer to Figure 1 And Figure 2In one embodiment of the present invention, the imprint pattern detection device 100 further includes a protective cover 5, which is disposed on the mobile platform 2. The protective cover 5 and the carrier plate 12 enclose a receiving cavity 51, and an opening is disposed on the side of the protective cover 5, through which part of the test piece 200 can extend into the receiving cavity 51. The opening only allows the test piece 200 to extend therein, so as to prevent the tester from mistakenly entering the detection area, thereby reducing the probability of safety accidents. The protective cover 5 is made of a transparent hard material, such as one of polyurethane, polymethyl methacrylate, polycarbonate and the like, which can not only defend against mechanical collision or accidental impact, but also observe the motion state of the mobile platform 2 in real time.

[0068] In one embodiment of the present invention, please refer to Figure 1 and Figure 2 , the engraved pattern detection device 100 also includes a safety grating 6, which includes a transmitter and a receiver. The transmitter and the receiver are respectively installed on both sides of the opening. The transmitter is used to emit a light beam, and the receiver is used to receive a light beam. Both the transmitter and the receiver are connected to the host for communication. The safety grating 6 forms a light beam barrier (such as infrared or multi-beam array) through the transmitter and the receiver. When the inspector's limbs or foreign objects accidentally block the light beam, the host immediately triggers the emergency stop mechanism to avoid causing physical injury to the inspector. Compared with physical baffles or mechanical interlocking devices, the safety grating 6 can achieve protection without direct contact, avoiding the risk of failure caused by wear of the mechanical structure. Through this setting, the probability of safety accidents can be further reduced.

[0069] In one embodiment of the present invention, the mobile platform 2 includes an X-axis driving assembly 21, a Y-axis driving assembly 22, a Z-axis driving assembly 23, a fixed platform 24 and a plurality of sliders; the three-dimensional laser scanner 3 and the mounting frame 41 are both mounted on the fixed platform 24, and the fixed platform 24 is mounted on the Z-axis driving assembly 23 through the slider, and performs vertical movement under the drive of the Z-axis driving assembly 23 ( Figure 1 The Z-axis driving assembly 23 is installed on the Y-axis driving assembly 22 through a slider, and performs horizontal movement in the Y direction under the drive of the Y-axis driving assembly 22 ( Figure 1 The Y-axis driving assembly 22 is installed on the X-axis driving assembly 21 through a slider, and performs horizontal movement in the X direction under the drive of the X-axis driving assembly 21 ( Figure 1The X-axis drive assembly 21 is installed on the top surface of the test platform 1. Each drive assembly is provided with a stepper motor and a screw structure connected to the stepper motor, the slider is connected to the screw structure, and the stepper motor drives the screw structure to drive the slider to translate, thereby driving the three-dimensional laser scanner 3 and the auxiliary positioning device 4 to move in the three directions of X, Y, and Z. In this embodiment, the cables of the mobile platform 2 are all installed in a bridge-type drag chain, which can guide the movement of the cables and at the same time can provide a certain degree of protection for the cables.

[0070] See also Figure 5 The present invention further proposes a marking pattern detection method, which is used in the marking pattern detection device 100 in the above embodiment. The marking pattern detection method includes:

[0071] S1: Selecting a preset testing program in the host according to the type of the device under test 200;

[0072] S2: The host controls the mobile platform 2 to drive the 3D laser scanner 3 and the auxiliary positioning device 4 to move to the detection position;

[0073] S3: The host controls the driving motor 42 to drive the laser sensor 44 to rotate to a preset position, and the laser sensor 44 detects the position information of the test piece 200 and sends the position information to the host;

[0074] S4: The host processes the position information and determines whether the installation position of the DUT 200 is correct;

[0075] S5: If the installation position of the test piece 200 is accurate, the host controls the 3D laser scanner 3 to scan the engraved pattern to obtain the 3D contour data of the engraved pattern. After the scanning is completed, the 3D laser scanner 3 sends the 3D contour data to the host;

[0076] S6: The host analyzes and processes the three-dimensional profile data to obtain the depth value of each part of the engraved pattern.

[0077] Among them, in S1, according to the type of the test piece 200, a plurality of detection programs are preset in the host. After the test piece 200 is placed on the detection table 1, the detection personnel need to select the corresponding detection program according to the type of the test piece 200. In S3, according to the working principle of the laser sensor 44 in the auxiliary positioning device 4 in the above embodiment, the laser sensor 44 detects the position information of the test piece 200, and the host processes the position information. If the host determines that the installation position of the test piece 200 is accurate, S5 is performed, otherwise, the position of the test piece 200 is readjusted and S1 is performed. The three-dimensional profile data in S5 and the depth value in S6 have been described in the above embodiment and will not be repeated here.

[0078] In one embodiment of the present invention, the engraving pattern detection method further includes:

[0079] S7: Compare the depth value with a preset value in the host to evaluate the engraving quality of the engraved pattern, and form a test report according to the comparison result.

[0080] The preset value refers to a set of preset depth values of multiple engraved patterns preset in the host, and a set of preset depth values is correspondingly set for each type of workpiece 200 to be measured. After the process of S6 ends, in order to facilitate the inspectors to intuitively obtain the evaluation of the engraved pattern, in S7, the depth value is compared with the preset value, the depth values smaller than the preset value are marked out, and the corresponding test points of the depth values are marked. Finally, a test report is formed. By referring to the test report, the inspectors can intuitively judge whether the engraved pattern can meet the design requirements, which shortens the judgment time of the inspectors.

[0081] The above is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A marking pattern detection device, used to detect the marking patterns on the surface of a test piece, characterized in that: include: A testing table, used for placing the test piece; A mobile platform, mounted on the detection platform; A three-dimensional laser scanner is installed on the mobile platform, and the mobile platform can drive the three-dimensional laser scanner to perform three-axis movement, and the three-dimensional laser scanner is used to scan the engraved pattern and form three-dimensional contour data; The auxiliary positioning device comprises a mounting frame, a driving motor, a connecting piece and a laser sensor, wherein the driving motor is mounted on the mobile platform through the mounting frame, the connecting piece is mounted on the output shaft of the driving motor, the laser sensor is mounted on the connecting piece, the driving motor is used to drive the laser sensor to rotate in a plane parallel to the top surface of the detection platform through the connecting piece, and the laser sensor is used to detect the position information of the object to be detected; The host, the mobile platform, the three-dimensional laser scanner, the drive motor and the laser sensor are all communicatively connected to the host, and the host can process the position information and the three-dimensional contour data.

2. The engraving pattern detection device according to claim 1, characterized in that: The three-dimensional laser scanner comprises a laser head, an optical lens group and an imaging unit, wherein the laser head and the optical lens group both face the detection platform, the laser head and the optical lens group are arranged at intervals, the imaging unit is arranged at intervals on a side of the optical lens group away from the detection platform, the imaging unit comprises an imaging surface arranged toward the optical lens, the focus of the optical lens group is arranged at the imaging surface, and the line between the laser head and the optical lens group is parallel to the imaging surface; The laser head is used to emit laser light toward the engraved lines. The laser light is reflected by the engraved lines and then emitted toward the optical lens group. The laser light is projected onto the imaging surface under the transmission effect of the optical lens group.

3. The engraving pattern detection device according to claim 1, characterized in that: The testing platform comprises a base and a carrying plate arranged on the top of the base, the mobile platform is installed on the carrying plate, and the carrying plate is used to place the test piece, the base is provided with at least one electrical cavity, and the host is accommodated in the electrical cavity.

4. The engraving pattern detection device according to claim 3, characterized in that: The testing platform further comprises at least two positioning members, at least two of which are installed on the carrying plate at intervals, and the positioning members are used to position the test piece.

5. The engraving pattern detection device according to claim 4, characterized in that: The positioning member includes a magnetic seat and a positioning shaft, the magnetic seat is used to be adsorbed on the surface of the supporting plate, the positioning shaft is installed on the side of the magnetic seat away from the supporting plate, the magnetic seat includes a magnetic switch, and the magnetic switch is used to control the magnitude of the magnetic force between the magnetic seat and the supporting plate.

6. The engraving pattern detection device according to claim 3, characterized in that: The engraved pattern detection device also includes a protective cover, which is arranged on the mobile platform. The protective cover and the supporting plate form a containing cavity. The side of the protective cover is provided with an opening, and part of the test piece can extend into the containing cavity through the opening.

7. The engraving pattern detection device according to claim 6, characterized in that: The engraved pattern detection device also includes a safety grating, which includes a transmitter and a receiver. The transmitter and the receiver are respectively installed on both sides of the opening. The transmitter is used to emit a light beam, and the receiver is used to receive the light beam. Both the transmitter and the receiver are communicatively connected to the host.

8. The engraving pattern detection device according to claim 1, characterized in that: The mobile platform includes an X-axis drive assembly, a Y-axis drive assembly, a Z-axis drive assembly, a fixed platform and a plurality of sliders; The three-dimensional laser scanner and the mounting frame are both mounted on the fixed platform, and the fixed platform is mounted on the Z-axis driving assembly through the slider and performs vertical movement under the drive of the Z-axis driving assembly; The Z-axis driving assembly is mounted on the Y-axis driving assembly through the slider, and performs horizontal movement in the Y direction under the drive of the Y-axis driving assembly; The Y-axis driving assembly is mounted on the X-axis driving assembly through the slider, and performs horizontal movement in the X direction under the drive of the X-axis driving assembly; The X-axis driving assembly is installed on the top surface of the detection platform.

9. A method for detecting engraved lines, characterized in that: Applied to the engraved pattern detection device according to any one of claims 1 to 8, the engraved pattern detection method comprises: Selecting a preset detection program in the host according to the type of the test piece; The host controls the mobile platform to drive the three-dimensional laser scanner and the auxiliary positioning device to move to the detection position; The host controls the driving motor to drive the laser sensor to rotate to a preset position, and the laser sensor detects the position information of the object to be tested and sends the position information to the host; The host processes the position information to determine whether the installation position of the device under test is accurate; If the installation position of the test piece is accurate, the host controls the three-dimensional laser scanner to scan the engraved pattern, obtains the three-dimensional contour data of the engraved pattern, and sends the three-dimensional contour data to the host; The host analyzes and processes the three-dimensional contour data to obtain depth values ​​at various locations of the engraved lines.

10. The engraved pattern detection method according to claim 9, characterized in that: The engraved pattern detection method also includes: The depth value is compared with a preset value in the host to evaluate the engraving quality of the engraved lines, and a test report is formed based on the comparison result.

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