Electronic camera with heating module and assembling method thereof

Abstract

The invention relates to the field of electronic rearview mirrors, in particular to an electronic camera with a heating module and an assembling method of the electronic camera. The distance measuring unit is arranged in the FPC mounting groove, whether the FPC heating wire and the FPC mounting groove are aligned or not is determined according to the distance information of the distance measuring unit, if the distances are almost the same, the FPC heating wire and the FPC mounting groove are basically aligned, and if the distances are much different, the FPC heating wire and the FPC mounting groove are not aligned and need to be finely adjusted. Therefore, the FPC heating wire can be prevented from being clamped between the lens module and the main mounting groove, the wire is prevented from being broken, the test efficiency is improved, and the product yield is also improved.

Description

[0001] This application is a divisional application of application number 202410453907.7, filing date April 15, 2024, and invention name “Electronic camera with heating module and assembly method thereof”. Technical Field

[0002] The invention relates to the field of electronic rearview mirrors, in particular to an electronic camera with a heating module and an assembling method thereof. Background Art

[0003] The production process of CMS modules (i.e., electronic rearview mirrors) on the market is as follows: the camera module needs to be assembled first, and then the protective cover with heating function is assembled. That is, a larger protective cover is added to the lens to cover the lens, and then a heating device is installed inside the protective cover. The heat generated by the heating device is used to conduct heat to the lens to achieve the function of heating and defogging the lens. The heating device will lead out the FPC heating wire, and finally the FPC heating wire with the heating device is inserted into the connector of the circuit board of the housing assembly to form an electrical connection between the heating device and the housing assembly so that the heating device can be controlled through the housing assembly.

[0004] In order to ensure product quality, the camera module and the housing assembly need to be tested separately, and the camera module and the housing assembly that have passed the test need to be assembled together. During the test, the camera module needs to be placed on the fixture for testing. However, since the exposed FPC heating wire is flexible, the camera module can be placed in the mounting slot even if the FPC heating wire is not aligned with the mounting slot on the fixture, which will affect the test and even cause the wire in the FPC heating wire to break, causing product failure.

[0005] In view of this, overcoming the deficiencies of the prior art products is an urgent problem to be solved in the field of this technology. Summary of the invention

[0006] The main technical problem solved by the present invention is to provide an electronic camera with a heating module and an assembly method thereof, the purpose of which is to ensure that the FPC heating wire is aligned with the FPC mounting groove by performing auxiliary detection through a ranging unit, thereby preventing the FPC heating wire from being clamped between the lens module and the main mounting groove and preventing the wire from breaking, thereby improving not only the test efficiency but also the product yield.

[0007] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide an assembly method of an electronic camera with a heating module, wherein the electronic camera comprises a housing assembly and a lens module, wherein the lens module is provided with an FPC heating wire, comprising:

[0008] The lens fixture corresponding to the lens module is placed on the first test position, and the housing fixture corresponding to the housing assembly is placed on the second test position, wherein the lens fixture comprises a main mounting groove and an FPC mounting groove extending from the main mounting groove, and the first distance measuring unit and the second distance measuring unit are respectively arranged on both sides of the FPC mounting groove; and the housing fixture comprises a housing mounting groove;

[0009] According to the positional relationship between the FPC heating wire of the lens module and the FPC mounting groove, adjusting the lens module so that the FPC heating wire is initially aligned with the FPC mounting groove;

[0010] Move the lens module downward along the FPC installation groove, and obtain the first distance information of the first distance measuring unit and the second distance information of the second distance measuring unit;

[0011] If the difference between the first distance information and the second distance information is less than a set threshold, continue to move the lens module downward so that the lens module is placed in the main mounting groove and the FPC heating wire is placed in the FPC mounting groove;

[0012] If the difference between the first distance information and the second distance information is not less than a set threshold, stop moving the lens module downward, and rotate the lens module toward the side with a larger distance until the difference between the first distance information measured by the first distance measuring unit and the second distance information measured by the second distance measuring unit is less than a set threshold, and move the lens module downward again;

[0013] Placing the housing assembly in the housing mounting groove;

[0014] The shell assembly and the lens module are tested separately, and the tested shell assembly and lens module are assembled together.

[0015] Further, adjusting the lens module according to the positional relationship between the FPC heating wire of the lens module and the FPC mounting slot so that the FPC heating wire is initially aligned with the FPC mounting slot includes:

[0016] Acquire first image information of the lens fixture taken by a first image sensor, and analyze the first image information to determine the spatial position of the main installation slot and the spatial position of the FPC installation slot;

[0017] Planning a first moving trajectory of the lens module according to the spatial position of the main installation slot, and placing the lens module above the main installation slot according to the first moving trajectory;

[0018] The lens module is rotated according to the spatial position of the FPC heating wire and the spatial position of the FPC mounting slot, so that the FPC heating wire is aligned with the FPC mounting slot.

[0019] The main mounting slot is provided with a first laser lamp, a second image sensor and a second laser lamp, the first laser lamp and the second laser lamp are used to emit light and form circular light spots of different colors on a plane perpendicular to the light axis direction of the laser lamp, the image sensor is located between the laser lamps, and the lens module is rotated according to the spatial position of the FPC heating wire and the spatial position of the FPC mounting slot so that the FPC heating wire is aligned with the FPC mounting slot, including:

[0020] Acquire a second image returned by a second image sensor in the main mounting slot;

[0021] Performing image segmentation on the second image to obtain a first light spot area formed by the first laser light on the second image, a second light spot area formed by the second laser light on the second image, and an FPC heating line segmentation area on the second image;

[0022] The first light spot area and the second light spot area are respectively subjected to circle fitting to obtain a first circular area and a first circle fitting error corresponding to the first light spot area, and a second circular area and a second circle fitting error corresponding to the second light spot area:

[0023] Determining whether the first circle fitting error and the second circle fitting error both meet a circular spot condition;

[0024] If both the first circle fitting error and the second circle fitting error do not satisfy the circular light spot condition, it is determined that the lens module has a deviation in the vertical direction, and a first straight line formed by two points with the farthest distance on the first light spot area is obtained;

[0025] Controlling the lens module to rotate in a vertical plane passing through the first straight line so that both the first light spot area and the second light spot area satisfy a circular light spot condition;

[0026] The lens module is controlled to rotate in a horizontal plane so that the FPC heating wire is aligned with the FPC installation groove.

[0027] Further, the first laser lamp, the second image sensor, the second laser lamp and the FPC mounting slot are sequentially arranged in a preset direction, the first laser lamp is used to emit light of a first color, the second laser lamp is used to emit light of a second color, and the control of the lens module to rotate in a horizontal plane so that the FPC heating line is aligned with the FPC mounting slot includes:

[0028] When both the first light spot area and the second light spot area satisfy the circular light spot condition, the relative position relationship among the centroid of the FPC heating line segmentation area, the centroid of the first light spot area, and the centroid of the second light spot area is obtained;

[0029] The lens module is controlled to rotate in a horizontal plane so that the centroid of the first light spot area, the centroid of the second light spot area and the centroid of the FPC heating line segmentation area are arranged in sequence on the same straight line so that the FPC heating line is aligned with the FPC mounting groove.

[0030] Furthermore, the housing assembly includes a housing and a circuit board, and after placing the housing assembly in the housing mounting groove, the process further includes performing a glue dispensing operation on the circuit board, specifically:

[0031] Obtain original image information of the shell assembly, obtain a first glue dispensing position based on the original image information, and perform glue dispensing at the first glue dispensing position; after one glue dispensing is completed, obtain intermediate image information of the shell assembly again, and determine whether the flatness of the circuit board after one glue dispensing meets the requirements based on the original image information and the intermediate image information; if not, correct the previous glue dispensing operation based on the tilt direction of the circuit board to ensure that the flatness of the circuit board meets the requirements.

[0032] Furthermore, the process of correcting the previous dispensing operation according to the tilt direction of the circuit board to ensure that the flatness of the circuit board meets the requirements includes:

[0033] If the glue applied last time has not solidified, press down the raised side according to the preset fine-tuning distance to make the flatness of the circuit board meet the requirements; if the glue applied last time has solidified or partially solidified, melt the solidified glue first and then make fine adjustments.

[0034] Further, the determining whether the flatness of the circuit board after one dispensing of glue meets the requirement according to the original image information and the intermediate image information includes:

[0035] The second circuit board border information of the circuit board and the second shell border information of the shell are extracted according to the intermediate image information. If the first shell border information is equal to the second shell border information, the first circuit board border information and the second circuit board border information are compared. If they are equal, the flatness of the circuit board meets the requirements; if they are not equal, the flatness of the circuit board does not meet the requirements.

[0036] Further, the acquiring original image information of the housing component, acquiring a first glue dispensing position according to the original image information, and performing glue dispensing at the first glue dispensing position comprises:

[0037] Acquire original image information of the shell component, perform boundary division on the original image information, and extract first circuit board frame information of the circuit board and first shell frame information of the shell from the image information;

[0038] Perform target recognition on the original image information to obtain a first intersection point, a second intersection point, a third intersection point and a fourth intersection point between the circuit board and the shell, wherein the first intersection point and the third intersection point are diagonally distributed, and the second intersection point and the fourth intersection point are diagonally distributed; dispense glue near the first intersection point and the third intersection point, and / or dispense glue near the second intersection point and the fourth intersection point.

[0039] Furthermore, at least one vent hole is provided in the middle area of ​​the FPC mounting groove, wherein the vent hole is provided obliquely upward, and during the process of placing the FPC heating wire in the FPC mounting groove, air is blown through the at least one vent hole to blow the FPC heating wire with the oblique upward airflow, thereby preventing the FPC heating wire from bending into the FPC mounting groove due to the weight of the solder pad.

[0040] Furthermore, the FPC heating wires are led out along the side walls of the lens module, and the FPC heating wires are symmetrically arranged relative to the axis of the lens module.

[0041] In order to solve the above technical problems, another technical solution adopted by the present invention is: to provide an electronic camera with a heating module, the camera includes a shell assembly and a lens module, and the shell assembly and the lens module are assembled together according to the assembly method.

[0042] The beneficial effects of the present invention are as follows: the present invention provides an electronic camera with a heating module and an assembly method thereof, by arranging a distance measuring unit in the FPC mounting slot, determining whether the FPC heating wire is aligned with the FPC mounting slot according to the distance information of the distance measuring unit, if the distance is similar, then the alignment is basically achieved, if the distance is much different, then the alignment is not achieved and fine-tuning is required. The FPC heating wire can be prevented from being clamped between the lens module and the main mounting slot, and the wire can be prevented from being broken, which not only improves the efficiency of the test, but also improves the yield of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0044] Figure 1 is a structural schematic diagram of a lens module provided by an embodiment of the present invention;

[0045] Figure 2 It is a flow chart of an assembly method of an electronic camera with a heating module provided by an embodiment of the present invention;

[0046] Figure 3 It is a structural schematic diagram of a lens clamp and a housing clamp provided by an embodiment of the present invention;

[0047] Figure 4 is a schematic diagram of a case where a first light spot area and a second light spot area on a second image captured by a second image sensor provided by an embodiment of the present invention do not meet a circular light spot condition;

[0048] Figure 5 is a schematic diagram of a case where a first light spot area and a second light spot area on a second image captured by a second image sensor provided by an embodiment of the present invention meet a circular light spot condition;

[0049] Figure 6 It is a schematic diagram of the case where the centroid of the first light spot area, the centroid of the second light spot area, and the centroid of the FPC heating line segmentation area on the second image captured by the second image sensor provided by an embodiment of the present invention are arranged in sequence on the same straight line;

[0050] Figure 7 is a distance measurement schematic diagram provided by an embodiment of the present invention;

[0051] Figure 8 is another distance measurement schematic diagram provided by an embodiment of the present invention;

[0052] Fig. 9 is a schematic diagram of the actual state structure of a heating lens provided by an embodiment of the present invention;

[0053] Fig.10 is a schematic diagram of a housing assembly provided by an embodiment of the present invention;

[0054] Fig.11 is a schematic diagram of a fixture provided by an embodiment of the present invention;

[0055] Fig.12 is a schematic diagram of a clamping jaw according to an embodiment of the present invention;

[0056] Fig.13 is a schematic diagram of the fixture set of the present invention;

[0057] Fig.14 It is a schematic diagram of the product positioning diagram when producing glue according to the present invention;

[0058] Fig.15 It is a schematic diagram of the glue color extraction diagram and width calculation of the present invention;

[0059] Fig.16 It is a schematic diagram of the laser rangefinder of the present invention testing the flatness of a circuit board. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0061] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0062] In the present invention, the word "exemplary" is used to mean "used as an example, illustration or description". Any embodiment described as "exemplary" in the present invention is not necessarily to be construed as being preferred or advantageous over other embodiments. The following description is given to enable any technician in the field to implement and use the present invention. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be elaborated in detail to avoid obscuring the description of the present invention with unnecessary details. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in the present invention.

[0063] It should be noted that since the method of the embodiment of the present invention is executed in an electronic device, the processing objects of each electronic device exist in the form of data or information. For example, time is actually time information. It can be understood that if size, quantity, position, etc. are mentioned in subsequent embodiments, they are all corresponding data for processing by the electronic device. The details will not be repeated here.

[0064] In terms of usage, CMS is an indirect vision device used to replace traditional rearview mirrors in cars. With the emergence of new technologies such as intelligent networking, autonomous driving, and ADAS, cars are rapidly developing in the direction of electronicization and intelligence, and car rearview mirrors are also developing. In the future, rearview mirrors will be allowed to be replaced, and the combination of cameras and monitors will be used to solve the rear view problem. Using a camera-monitor system (CMS) to replace the rearview mirrors that are mandatory to be installed by the standard will help reduce the vehicle's air resistance, reduce blind spots, and improve the field of view performance in harsh environments. At the same time, the camera that replaces the rearview mirror can integrate ADAS and intelligent networking related functions, and display visual information in real time on an appropriate display in the car. CMS includes a camera (camera) that captures the field of view and sends signals to the electronic control unit (ECU) for further processing, and then uses a display (monitor) to provide the driver with a field of view.

[0065] In order to meet the needs of scenarios such as defogger, a heating device is currently added to the camera module. The FPC heating wire of the heating device is connected to the connector on the shell assembly to control the heating device.

[0066] However, the introduction of FPC heating wires poses a challenge to the automated testing of lens modules. This is because the exposed FPC heating wires are flexible. Even if the FPC heating wires are not aligned with the mounting slots on the fixture, the camera module can be placed in the mounting slots, which will affect the test and may even cause the wires in the FPC heating wires to break, resulting in product failure.

[0067] In order to solve the above problems, this embodiment provides an assembly method of an electronic camera with a heating module, such as Figure 1 and Figure 2 As shown, the electronic camera includes a housing assembly and a lens module, and the lens module is led out with an FPC heating wire. The lens module is cylindrical as a whole, and the FPC heating wire is led out along the side wall of the lens module. The housing assembly includes a housing and a circuit board, and the housing and the circuit board are both rectangular or square. There is an air-avoiding groove on the circuit board, so that the FPC heating wire can be inserted into the air-avoiding groove and then connected to the connector on the circuit board.

[0068] like Figure 3 As shown, the step includes:

[0069] Step 10: Place the lens fixture corresponding to the lens module on the first test position, and place the shell fixture corresponding to the shell assembly on the second test position.

[0070] Wherein, the lens fixture comprises a main mounting groove and an FPC mounting groove extending from the main mounting groove, and a first ranging unit and a second ranging unit are respectively arranged on both sides of the FPC mounting groove; and the housing fixture comprises a housing mounting groove.

[0071] In this embodiment, the lens module and the housing assembly are moved by a robotic arm.

[0072] Step 11: According to the positional relationship between the FPC heating wire of the lens module and the FPC mounting groove, the lens module is adjusted so that the FPC heating wire is initially aligned with the FPC mounting groove.

[0073] In an embodiment of the present invention, adjusting the lens module according to the positional relationship between the FPC heating wire of the lens module and the FPC mounting slot so that the FPC heating wire is initially aligned with the FPC mounting slot comprises:

[0074] (1) Acquire first image information of the lens fixture taken by a first image sensor, and analyze the first image information to determine the spatial position of the main installation slot and the spatial position of the FPC installation slot.

[0075] The first image sensor may be positioned according to specific circumstances, and is used to photograph the lens fixture, thereby identifying the spatial position of the main mounting slot and the spatial position of the FPC mounting slot.

[0076] (2) Planning a first moving trajectory of the lens module according to the spatial position of the main installation slot, and placing the lens module above the main installation slot according to the first moving trajectory.

[0077] (3) Rotating the lens module according to the spatial position of the FPC heating wire and the spatial position of the FPC mounting slot so that the FPC heating wire is aligned with the FPC mounting slot.

[0078] In order to avoid the deviation of the lens module in the vertical direction, which causes the bottom of the lens module to be not in the horizontal plane and the FPC heating line to be not vertically downward, in the embodiment of the present invention, a first laser lamp, a second image sensor and a second laser lamp are arranged in the main installation groove, and the first laser lamp and the second laser lamp are used to emit light and form circular light spots of different colors on a plane perpendicular to the direction of the laser light axis, and the image sensor is located between the laser lamps. For example, the first laser lamp forms a red circular light spot on a plane perpendicular to the direction of the laser light axis, and the second laser lamp forms a yellow circular light spot on a plane perpendicular to the direction of the laser light axis.

[0079] Correspondingly, rotating the lens module according to the spatial position of the FPC heating wire and the spatial position of the FPC mounting slot so that the FPC heating wire is aligned with the FPC mounting slot may include:

[0080] (1) Acquire a second image returned by a second image sensor in the main mounting groove.

[0081] When the lens module is placed above the main mounting groove, the second image returned by the second image sensor in the main mounting groove will include the first light spot, the second light spot and the FPC heating line.

[0082] (2) Performing image segmentation on the second image to obtain a first light spot area formed by the first laser light on the second image, a second light spot area formed by the second laser light on the second image, and an FPC heating line segmentation area on the second image.

[0083] like Figure 4 As shown, the second image is segmented using a pre-trained image segmentation model to obtain the first light spot area formed by the first laser light on the second image, the second light spot area formed by the second laser light on the second image, and the FPC heating line segmentation area on the second image.

[0084] (3) performing circle fitting on the first light spot area and the second light spot area respectively to obtain a first circular area and a first circle fitting error corresponding to the first light spot area, and a second circular area and a second circle fitting error corresponding to the second light spot area.

[0085] Specifically, the least square method can be used to perform circle fitting on the first light spot area and the second light spot area respectively. The least square method (also known as the least square method) is a mathematical optimization technique. It finds the best function matching of data by minimizing the sum of squares of errors. The least square method can be used to easily obtain unknown data and minimize the sum of squares of errors between the obtained data and the actual data. The least square method can also be used for curve fitting. Some other optimization problems can also be expressed by the least square method by minimizing energy or maximizing entropy.

[0086] The first circle fitting error and the second circle fitting error are the sum of squares of errors when the least squares method is used for fitting.

[0087] (4) Determine whether the first circle fitting error and the second circle fitting error both satisfy a circular spot condition.

[0088] For example, the circular spot condition is that the fitting error is less than a preset value, and the preset value can be set according to specific circumstances. The larger the first circle fitting error and the second circle fitting error, the less the first spot area and the second spot area are close to a circle.

[0089] (5) If both the first circle fitting error and the second circle fitting error do not meet the circular light spot condition, it is determined that the lens module has a deviation in the vertical direction, and a first straight line formed by the two points farthest from each other in the first light spot area is obtained.

[0090] If both the first circle fitting error and the second circle fitting error do not meet the circular spot condition, it means that the first spot area and the second spot area are not close to a circle, which means that the lens module deviates in the vertical direction, causing the bottom of the lens module to be not in the horizontal plane, and the FPC heating line is not vertically downward, and needs to be adjusted.

[0091] If both the first circle fitting error and the second circle fitting error meet the circular spot condition, it means that the first spot area and the second spot area are close to a circle, which means that the lens module has no deviation in the vertical direction, the FPC heating line is vertically downward, and the next step can be performed.

[0092] like Figure 4 As shown, the two points farthest from each other on the first spot area are point A and point B, and the two points farthest from each other on the first spot area form a first straight line. If both the first circle fitting error and the second circle fitting error do not meet the circular spot condition, it means that the first spot area and the second spot area are not close to a circle.

[0093] (6) Controlling the lens module to rotate in a vertical plane passing through the first straight line so that the first light spot area and the second light spot area both meet the circular light spot condition.

[0094] Specifically, Figure 4 As shown, the two points farthest from each other on the first light spot area are point A and point B, and the first straight line is formed by the two points farthest from each other on the first light spot area. The brightness of the two points farthest from each other on the first light spot area is obtained, and the rotation direction is determined based on the brightness of the two points farthest from each other on the first light spot area, wherein the rotation direction is that the actual physical position point corresponding to the point with greater brightness among the two points farthest from each other on the first light spot area is far away from the second image sensor and the actual physical position point corresponding to the point with less brightness among the two points farthest from each other on the first light spot area is close to the second image sensor, and the lens module is controlled to rotate in a vertical plane passing through the first straight line so that both the first light spot area and the second light spot area meet the circular light spot condition. The greater the brightness, the closer it is, and it needs to be moved away.

[0095] (7) Control the lens module to rotate in a horizontal plane so that the FPC heating wire is aligned with the FPC mounting groove.

[0096] In an embodiment of the present invention, the first laser lamp, the second image sensor, the second laser lamp and the FPC mounting slot are sequentially arranged in a preset direction, the first laser lamp is used to emit light of a first color, the second laser lamp is used to emit light of a second color, and the control of the lens module to rotate in a horizontal plane so that the FPC heating line is aligned with the FPC mounting slot includes:

[0097] (1) When both the first light spot area and the second light spot area satisfy the circular light spot condition, the relative position relationship among the centroid of the FPC heating line segmentation area, the centroid of the first light spot area, and the centroid of the second light spot area is obtained.

[0098] When the first light spot area and the second light spot area both meet the circular light spot condition, the image acquired by the second image sensor is as follows: Figure 5 The relative position relationship among the centroid of the FPC heating line segmentation area, the centroid of the first light spot area, and the centroid of the second light spot area is obtained. The centroid of the FPC heating line segmentation area is C, the centroid of the first light spot area is E, and the centroid of the second light spot area is D.

[0099] like Figure 5 As shown, the centroid of the FPC heating line segmentation area, the centroid of the first light spot area, and the centroid of the second light spot area are not located on the same straight line, which means that the FPC heating line is not aligned with the FPC installation slot in the horizontal plane and needs to be rotated.

[0100] (2) Controlling the lens module to rotate in a horizontal plane so that the centroid of the first light spot area, the centroid of the second light spot area, and the centroid of the FPC heating line segmentation area are arranged in sequence on the same straight line, so that the FPC heating line is aligned with the FPC mounting groove.

[0101] like Figure 5 As shown, it is determined whether the centroid of the first light spot area, the centroid of the second light spot area, and the centroid of the FPC heating line segmentation area are arranged in sequence on the same straight line. If the centroid of the first light spot area, the centroid of the second light spot area, and the centroid of the FPC heating line segmentation area are arranged in sequence on the same straight line, no adjustment is required. If the centroid of the first light spot area, the centroid of the second light spot area, and the centroid of the FPC heating line segmentation area are not arranged in sequence on the same straight line, the lens module is controlled to rotate in a horizontal plane so that the centroid of the first light spot area, the centroid of the second light spot area, and the centroid of the FPC heating line segmentation area are arranged in sequence on the same straight line, so that the FPC heating line is aligned with the FPC mounting groove.

[0102] like Figure 6As shown, when the centroid E of the first light spot area, the centroid D of the second light spot area and the centroid C of the FPC heating line segmentation area are arranged in sequence on the same straight line, the FPC heating line is aligned with the FPC mounting groove. After the adjustment is completed, the lens module can be moved downward along the FPC mounting groove.

[0103] Step 12: Move the lens module downward along the FPC mounting groove, and obtain the first distance information of the first ranging unit and the second distance information of the second ranging unit.

[0104] In the process of moving the lens module downward along the FPC mounting groove, the FPC heating wire gradually enters the FPC mounting groove. In order to avoid a slight rotation of the FPC heating wire in the horizontal plane, which causes a deviation between the FPC heating wire and the FPC mounting groove, a distance measuring unit is introduced to assist in testing.

[0105] This is because the lens module is cylindrical as a whole, the FPC heating wire is led out along the side wall of the lens module, and the FPC heating wire is symmetrically arranged relative to the axis of the lens module. Figure 7 As shown, if the FPC heating wire is aligned with the FPC mounting slot, the measured distance information is equal or substantially the same; Figure 8 As shown, if the measured distance information is too different, it means that there is no alignment.

[0106] Step 13: If the difference between the first distance information and the second distance information is less than a set threshold, continue to move the lens module downward so that the lens module is placed in the main mounting groove and the FPC heating wire is placed in the FPC mounting groove.

[0107] Step 14: If the difference between the first distance information and the second distance information is not less than a set threshold, stop moving the lens module downward and rotate the lens module toward the side with a larger distance until the difference between the first distance information measured by the first ranging unit and the second distance information measured by the second ranging unit is less than the set threshold, and move the lens module downward again.

[0108] Combination Figure 5 , the first distance information measured by the first distance measuring unit is greater than the second distance information measured by the second distance measuring unit, then the lens module is rotated counterclockwise until the difference between the first distance information measured by the first distance measuring unit and the second distance information measured by the second distance measuring unit is less than the set threshold, and the lens module is moved downward again.

[0109] According to the aforementioned mechanism, continuous monitoring is performed to ensure that the FPC heating wire is always aligned with the FPC mounting slot.

[0110] Step 15: Place the shell assembly in the shell mounting groove.

[0111] Step 16: Test the shell assembly and the lens module separately, and assemble the tested shell assembly and lens module together.

[0112] Combination Figure 9-13 After placement, the PLASMA process test will be automatically performed after the equipment is started.

[0113] After completing PLASMA, the lens module and housing assembly are grabbed by the robot arm gripper, and they are placed in the lens fixture and housing fixture in the AA fixture set respectively. At this time, the lens heating wire must also be placed in the FPC mounting slot of the lens fixture. After placement, it automatically enters the next process AA process, which will be automatically completed by the equipment. First, the placed product is visually positioned by the visual function of the equipment, and then the product module is automatically tested for glue dispensing. After the glue dispensing is completed, the product and the lens are moved to the AA position through the moving axis and placed directly under the six-axis mechanism. The lens module is then clamped by the AA lens gripper and moved to the housing assembly where glue has been dispensed. At this time, the FPC heating wire needs to pass through the air avoidance slot on the circuit board, and then the AA six-axis is moved for automatic AA correction test. After the correction is completed, the pre-cured glue is applied so that the lens module and the housing are assembled together, completing the assembly process of a product. The post-process only needs to bake the assembled product to fully cure it.

[0114] Regarding the glue dispensing operation, this embodiment has also made improvements. During the glue dispensing process, the circuit board may be tilted. If such products flow into the market, this tilted state will exert a corresponding force on the circuit board. As time accumulates, this force will cause the wires in the circuit board to break, causing the product to fail. In order to improve this problem, the glue dispensing operation of this embodiment is as follows:

[0115] In one embodiment, the shell assembly includes a shell and a circuit board. After placing the shell assembly in the shell mounting groove, the step further includes performing a gluing operation on the circuit board, specifically: obtaining original image information of the shell assembly, obtaining a first gluing position based on the original image information, and performing a gluing operation at the first gluing position; after one gluing operation is completed, obtaining the intermediate image information of the shell assembly again, and determining whether the flatness of the circuit board after one gluing operation meets the requirements based on the original image information and the intermediate image information; if not, correcting the previous gluing operation based on the tilt direction of the circuit board to determine whether the flatness of the circuit board meets the requirements.

[0116] In one embodiment, the previous glue dispensing operation is corrected according to the tilt direction of the circuit board to ensure that the flatness of the circuit board meets the requirements, including: if the glue dispensed last time has not solidified, pressing down the raised side according to a preset fine-tuning distance to ensure that the flatness of the circuit board meets the requirements; if the glue dispensed last time has solidified or partially solidified, first melting the solidified glue and then performing fine-tuning.

[0117] In one embodiment, determining whether the flatness of the circuit board after one dispensing of glue meets the requirements according to the original image information and the intermediate image information includes: extracting the second circuit board frame information of the circuit board and the second shell frame information of the shell according to the intermediate image information, if the first shell frame information is equal to the second shell frame information, then comparing the first circuit board frame information and the second circuit board frame information, if they are equal, the flatness of the circuit board meets the requirements, if they are not equal, the flatness of the circuit board does not meet the requirements. In one embodiment, the image information can be subjected to target recognition, and the first intersection point, the second intersection point, the third intersection point and the fourth intersection point of the circuit board and the shell are obtained, and the figure surrounded by the first intersection point, the second intersection point, the third intersection point and the fourth intersection point is the circuit board frame information.

[0118] Among them, the method for obtaining the first circuit board border information is: establishing a border based on the first intersection point, the second intersection point, the third intersection point and the fourth intersection point to obtain the first circuit board border information; the method for obtaining the second circuit board border information is: obtaining the intersection position of the glue and the shell component, and establishing a border based on the intersection position to obtain the second circuit board border information.

[0119] In one embodiment, a circular mark may be provided on the circuit board. If the circular mark is deformed (for example, becomes an ellipse), it indicates that the circuit board is tilted.

[0120] In this embodiment, judging whether there is a tilt according to border information is used as an example to illustrate how to determine the preset fine-tuning distance. The method for determining the preset fine-tuning distance includes: taking sides of unequal lengths as calculation objects, obtaining the first side length from the first circuit board border information, and obtaining the second side length from the second circuit board border information, wherein the second side length will be greater than the first side length, because the glue will be mistakenly identified as the border of the circuit board.

[0121] A right triangle is established with the length of the first side as the right-angled side and the length of the second side as the hypotenuse, the length of the other right-angled side is determined according to the functional relationship of the right triangle, and the length of the other right-angled side is used as the preset fine-tuning distance.

[0122] In one embodiment, the obtaining of original image information of the shell component, obtaining a first glue dispensing position according to the original image information, and performing glue dispensing at the first glue dispensing position include: obtaining original image information of the shell component, performing boundary division on the original image information, and extracting first circuit board border information of the circuit board and first shell border information of the shell from the original image information; performing target recognition on the original image information, obtaining a first intersection point, a second intersection point, a third intersection point and a fourth intersection point of the circuit board and the shell, wherein the first intersection point and the third intersection point are diagonally distributed, and the second intersection point and the fourth intersection point are diagonally distributed; dispensing glue near the first intersection point and near the third intersection point, and / or dispensing glue near the second intersection point and the fourth intersection point.

[0123] In this embodiment, the dispensing principle is specifically as follows:

[0124] (1) First, use a camera to obtain an image of the circuit board and save the image as a reference image. Set an area on the reference image and capture the best feature from it. Then, based on the best feature, find a boundary line fitting circle in the area to determine the center point of the product, as follows: Fig.14 ;

[0125] (2) The camera is moved along the X and / or Y axis to move on the nine-square grid, and a picture is taken to locate the camera. The relationship between the pixel unit of the picture and the distance is calculated, which is the nine-point calibration method. In practical applications, the offset distance can be determined by taking a picture to determine how many pixels are offset.

[0126] (3) Through the above offset distance, the center point position is automatically corrected to achieve precise positioning. Based on the located point as the center of the circle, a circle is drawn with a radius that can be set by the program, thus achieving the goal of drawing a circle and dispensing glue.

[0127] (4) Glue identification: take a photo with a camera, extract the glue color, process the glue, and then calculate the width and number of segments of the glue point to confirm whether the glue point is appropriate. Fig.15 shown.

[0128] In one embodiment, it is also possible to detect whether the circuit board has a tilt correction principle in the following manner:

[0129] like Fig.16 As shown in the figure, place the product inside the fixture, use the laser distance meter on the equipment to measure a set of heights at the four corners or the center of the circuit board, use this set of data to calculate the horizontality of the circuit board, and then automatically perform compensation correction. Repeat this process several times until the horizontal angle reaches the required range. And save this corrected data as the reference parameter.

[0130] In actual application, the laser height is measured on the four corners and the center of each product, and the reference parameters are used to quickly adjust it to a relatively horizontal range.

[0131] In one embodiment, there may also be a situation where the FPC heating wire enters the FPC mounting groove upward. In this case, the corresponding FPC heating wire is placed upward; one end of the FPC heating wire is connected to the functional module in the lens module, and the other end of the FPC heating wire is provided with a solder pad. For the slender FPC heating wire, under the action of the solder pad, the upper half of the FPC heating wire will sag, causing the FPC heating wire to bend. In the process of placing the FPC heating wire in the FPC mounting groove, since the FPC heating wire is in a bent state, one end with the solder pad may enter the FPC mounting groove, causing the wire in the FPC heating wire to be broken. In order to avoid this situation, the FPC mounting groove is improved as follows: at least one vent is provided in the middle area of ​​the FPC mounting groove, wherein the vent is arranged obliquely upward, and in the process of placing the FPC heating wire in the FPC mounting groove, air is blown through the at least one vent to blow the FPC heating wire through the oblique upward airflow to avoid the FPC heating wire from bending into the FPC mounting groove due to the weight of the solder pad.

[0132] Based on the assembly method of the aforementioned embodiment, this embodiment provides an electronic camera with a heating module, wherein the camera comprises a shell assembly and a lens module, and the shell assembly and the lens module are assembled together according to the assembly method of the aforementioned embodiment.

[0133] The embodiments of the present invention have at least the following effects:

[0134] The lens module used in the present invention is internally encapsulated with a heating module, and an FPC heating line is led out from the side of the lens module, so as to be conveniently connected to the PCBA board for power supply.

[0135] The PCBA board used is designed with air holes, which facilitates the FPC heating wire to pass through the air holes on the PCBA smoothly, and then connect to the connector on the other side of the PCBA board to power it on.

[0136] The PLSAMA lens base (i.e., lens fixture) and AA lens base (i.e., lens fixture) used need to be adapted to the lens size. At the same time, grooves need to be designed in the lens base to avoid the lens heating wire and maintain the function of positioning the lens and heating wire so that the heating wire can be shaped and kept vertically downward.

[0137] The production test process is easy to operate and has a simple structure, which greatly reduces production manpower and assembly costs.

[0138] For the production of different models of modules with heating functions, including changes in lens size, housing size, PCBA board size, etc., you only need to adapt and produce different base diagrams.

[0139] This process can be adapted to the production of modules with heating functions for any type of product.

[0140] This process places the heating lens functional accessories inside the lens, and the heating FPC circuit is also assembled inside the overall module, which greatly utilizes the internal space of the module and reduces the module's external volume.

[0141] This process uses a built-in heating wire lens and automatically assembles the AA process. There is no need to add other components to heat the lens, which greatly reduces the process steps and saves material and labor costs.

[0142] The above description is only an implementation mode of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for assembling an electronic camera with a heating module, characterized in that: The electronic camera comprises a housing assembly and a lens module, wherein the housing assembly comprises a shell and a circuit board, an FPC heating wire is led out of the lens module, the FPC heating wire is led out along the side wall of the lens module, and the FPC heating wire is symmetrically arranged relative to the axis of the lens module, and comprises: The lens fixture corresponding to the lens module is placed on the first test position, and the housing fixture corresponding to the housing assembly is placed on the second test position, wherein the lens fixture comprises a main mounting groove and an FPC mounting groove extending from the main mounting groove, and the first distance measuring unit and the second distance measuring unit are respectively arranged on both sides of the FPC mounting groove; and the housing fixture comprises a housing mounting groove; According to the positional relationship between the FPC heating wire of the lens module and the FPC mounting groove, adjusting the lens module so that the FPC heating wire is initially aligned with the FPC mounting groove; Move the lens module downward along the FPC installation groove, and obtain the first distance information of the first distance measuring unit and the second distance information of the second distance measuring unit; If the difference between the first distance information and the second distance information is less than a set threshold, continue to move the lens module downward so that the lens module is placed in the main mounting groove and the FPC heating wire is placed in the FPC mounting groove; If the difference between the first distance information and the second distance information is not less than a set threshold, stop moving the lens module downward, and rotate the lens module toward the side with a larger distance until the difference between the first distance information measured by the first distance measuring unit and the second distance information measured by the second distance measuring unit is less than a set threshold, and move the lens module downward again; The shell assembly is placed in the shell mounting groove, and a first intersection point, a second intersection point, a third intersection point and a fourth intersection point between the circuit board and the shell are obtained, wherein the first intersection point and the third intersection point are diagonally distributed, and the second intersection point and the fourth intersection point are diagonally distributed; glue is dispensed near the first intersection point and the third intersection point, and / or glue is dispensed near the second intersection point and the fourth intersection point, and the glue dispensing operation includes: firstly, an image of the circuit board is obtained by a camera, and the obtained image is saved as a reference image, an area is set on the reference image, and the best feature is captured therefrom, and then a boundary line fitting circle is found in the area according to the best feature to determine the center point position, the camera is moved along the X and / or Y axis, so that the camera moves on the nine-square grid, and a picture is taken for positioning, and the offset distance can be determined by taking a picture to determine how many pixel units are offset, and the center point position is automatically corrected by the offset distance to achieve precise positioning, and a circle is drawn based on the located point as the center of the circle plus a radius that can be set by the program, so as to achieve circle drawing and glue dispensing; The shell assembly and the lens module are tested separately, and the tested shell assembly and lens module are assembled together.

2. The method for assembling an electronic camera with a heating module according to claim 1, characterized in that: The adjusting the lens module according to the positional relationship between the FPC heating wire of the lens module and the FPC mounting slot so that the FPC heating wire is initially aligned with the FPC mounting slot comprises: Acquire first image information of the lens fixture taken by a first image sensor, and analyze the first image information to determine the spatial position of the main installation slot and the spatial position of the FPC installation slot; Planning a first moving trajectory of the lens module according to the spatial position of the main installation slot, and placing the lens module above the main installation slot according to the first moving trajectory; The lens module is rotated according to the spatial position of the FPC heating wire and the spatial position of the FPC mounting slot, so that the FPC heating wire is aligned with the FPC mounting slot.

3. The method for assembling an electronic camera with a heating module according to claim 2, characterized in that: The main mounting slot is provided with a first laser lamp, a second image sensor and a second laser lamp, the first laser lamp and the second laser lamp are used to emit light and form circular light spots of different colors on a plane perpendicular to the laser light axis direction, the second image sensor is located between the laser lamps, and the lens module is rotated according to the spatial position of the FPC heating wire and the spatial position of the FPC mounting slot so that the FPC heating wire is aligned with the FPC mounting slot, including: Acquire a second image returned by a second image sensor in the main mounting slot; Performing image segmentation on the second image to obtain a first light spot area formed by the first laser light on the second image, a second light spot area formed by the second laser light on the second image, and an FPC heating line segmentation area on the second image; Performing circle fitting on the first light spot area and the second light spot area respectively, to obtain a first circular area and a first circle fitting error corresponding to the first light spot area, and a second circular area and a second circle fitting error corresponding to the second light spot area; Determining whether the first circle fitting error and the second circle fitting error both meet a circular spot condition; If both the first circle fitting error and the second circle fitting error do not satisfy the circular light spot condition, it is determined that the lens module has a deviation in the vertical direction, and a first straight line formed by two points with the farthest distance on the first light spot area is obtained; Controlling the lens module to rotate in a vertical plane passing through the first straight line so that both the first light spot area and the second light spot area satisfy a circular light spot condition; The lens module is controlled to rotate in a horizontal plane so that the FPC heating wire is aligned with the FPC installation groove.

4. The method for assembling an electronic camera with a heating module according to claim 3, characterized in that: The first laser lamp, the second image sensor, the second laser lamp and the FPC mounting slot are sequentially arranged in a preset direction, the first laser lamp is used to emit light of a first color, the second laser lamp is used to emit light of a second color, and the lens module is controlled to rotate in a horizontal plane so that the FPC heating line is aligned with the FPC mounting slot, including: When both the first light spot area and the second light spot area satisfy the circular light spot condition, the relative position relationship among the centroid of the FPC heating line segmentation area, the centroid of the first light spot area, and the centroid of the second light spot area is obtained; The lens module is controlled to rotate in a horizontal plane so that the centroid of the first light spot area, the centroid of the second light spot area and the centroid of the FPC heating line segmentation area are arranged in sequence on the same straight line so that the FPC heating line is aligned with the FPC mounting groove.

5. The method for assembling an electronic camera with a heating module according to claim 1, characterized in that: The assembly method of the electronic camera with a heating module also includes: Obtain original image information of the shell assembly, obtain a first glue dispensing position based on the original image information, and perform glue dispensing at the first glue dispensing position; after one glue dispensing is completed, obtain intermediate image information of the shell assembly again, and determine whether the flatness of the circuit board after one glue dispensing meets the requirements based on the original image information and the intermediate image information; if not, correct the previous glue dispensing operation based on the tilt direction of the circuit board to ensure that the flatness of the circuit board meets the requirements.

6. The method for assembling an electronic camera with a heating module according to claim 5, characterized in that: The method of correcting the previous dispensing operation according to the tilt direction of the circuit board to ensure that the flatness of the circuit board meets the requirements includes: If the glue applied last time has not solidified, press down the raised side according to the preset fine-tuning distance to make the flatness of the circuit board meet the requirements; if the glue applied last time has solidified or partially solidified, melt the solidified glue first and then make fine adjustments.

7. The method for assembling an electronic camera with a heating module according to claim 5, characterized in that: The determining whether the flatness of the circuit board after one dispensing of glue meets the requirement according to the original image information and the intermediate image information includes: A circular mark is set on the circuit board. If the circular mark is deformed, it means that the circuit board is tilted.

8. The method for assembling an electronic camera with a heating module according to claim 5, characterized in that: The determining whether the flatness of the circuit board after one dispensing of glue meets the requirement according to the original image information and the intermediate image information includes: Performing boundary division on the original image information, and extracting first circuit board frame information of the circuit board and first shell frame information of the shell from the original image information; The second circuit board border information of the circuit board and the second shell border information of the shell are extracted according to the intermediate image information. If the first shell border information is equal to the second shell border information, the first circuit board border information and the second circuit board border information are compared. If they are equal, the flatness of the circuit board meets the requirements; if they are not equal, the flatness of the circuit board does not meet the requirements.

9. The method for assembling an electronic camera with a heating module according to claim 6, characterized in that: At least one vent hole is provided in the middle area of ​​the FPC mounting groove, wherein the vent hole is provided obliquely upward. When the FPC heating wire is placed in the FPC mounting groove, air is blown through the at least one vent hole to blow the FPC heating wire with the oblique upward airflow, thereby preventing the FPC heating wire from bending into the FPC mounting groove due to the weight of the solder pad.

10. An electronic camera with a heating module, characterized in that: The camera comprises a shell assembly and a lens module, and the shell assembly and the lens module are assembled together according to the assembly method according to any one of claims 1 to 9.

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