Frame component shape detection method and system

Abstract

The present application discloses a method and system for detecting the shape of vehicle frame parts, and relates to the field of vehicle frame detection technology. The method includes: obtaining an identification code of a vehicle frame to be tested, and identifying the type of application vehicle to which the vehicle frame to be tested belongs according to the identification code; calling a detection database, searching the detection database for a first detection sequence corresponding to the vehicle frame to be tested, and detecting in sequence; if the detection index of a component detected by the current detection station is unqualified, marking the detection index of the component as an abnormal component index and obtaining the associated component index set; according to the corresponding detection sequence, sequentially detecting the detection index of the undetected components in the associated component index set, when the unqualified rate is zero, transporting the vehicle frame to be tested to a re-inspection area, and re-inspecting the unqualified detection index of the corresponding component; if the re-inspection result is qualified, generating a detection equipment fault prompt information. Reasonably arrange the detection work to avoid misjudgment of the detection result and effectively improve the detection efficiency.

Description

Technical Field

[0001] The present application generally relates to the field of vehicle frame detection technology, and specifically to a method and system for detecting the shape of vehicle frame components. Background Art

[0002] The frame assembly plays an important role in the vehicle field, supporting and installing the engine and its components and assemblies, forming the overall shape of the car, receiving the power of the engine, and ensuring the normal driving of the car. The dimensional accuracy of the frame assembly has a very important impact on the assembly operability, the sensory quality of the whole vehicle, and the functional achievement. At present, the shape detection efficiency of the frame assembly before leaving the factory is low. Therefore, we propose a frame component shape detection method and system to solve the above problems. Summary of the invention

[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a frame component shape detection method and system that improves detection efficiency.

[0004] In a first aspect, the present application provides a method for detecting the shape of a frame component, comprising the following steps:

[0005] Obtaining an identification code of the vehicle frame to be tested, and identifying the type of application vehicle to which the vehicle frame to be tested belongs according to the identification code;

[0006] Calling a detection database, searching the detection database for a first detection sequence corresponding to the frame to be tested according to the application vehicle type to which the frame to be tested belongs; the detection database at least includes: a plurality of vehicle types and corresponding first detection sequences, and a set of associated component indicators; the first detection sequence is determined according to component importance parameters and detection indicator importance parameters of the components; each of the associated component indicator sets includes detection indicators and detection sequences of a plurality of mutually associated components corresponding to the application vehicle type;

[0007] According to the first detection sequence, the frame to be tested is transferred to the corresponding detection station for sequential detection; if the detection index of the component detected by the current detection station is unqualified, the detection index of the component is marked as an abnormal component index and the associated component index set to which the abnormal component index belongs is obtained;

[0008] According to the detection order corresponding to the associated component indicator set to which the abnormal component indicator belongs, the detection indicators of the components that have not been detected in the associated component indicator set are detected in sequence, and when the detection indicators of the components in the associated component indicator set are detected, the unqualified rate of the detection indicators of the components in the associated component indicator set except the abnormal component indicator is obtained;

[0009] When the unqualified rate is zero, the frame to be tested is transferred to a re-inspection area, and the inspection indicators of the corresponding unqualified parts are re-inspected; if the re-inspection result is qualified, a detection equipment failure prompt information is generated.

[0010] According to the technical solution provided by this application, the following steps are also included:

[0011] When the unqualified rate of the detection index of the components other than the abnormal component index in the associated component index set is a non-zero value, the frame to be tested is transported to a repair area, and the detection indexes of all unqualified components in the associated component index set are repaired.

[0012] According to the technical solution provided by this application, the following steps are also included:

[0013] When the unqualified rate of the inspection index of the components other than the abnormal component index in the associated component index set is non-zero and greater than or equal to the first threshold, the frame to be tested is transferred to the corresponding inspection station according to the first inspection sequence, and the repaired frame to be tested is continued to be inspected.

[0014] According to the technical solution provided by this application, the following steps are also included:

[0015] When the unqualified rate of the detection index of the components other than the abnormal component index in the associated component index set is non-zero and less than the first threshold, obtaining the first component index in the associated component index set; the first component index is the detection index of the components ranked in the last 50% in the first detection sequence;

[0016] A second inspection sequence is obtained by removing the first component index in the first inspection sequence. According to the second inspection sequence, the frame to be tested is transferred to a corresponding inspection station to continue to inspect the repaired frame to be tested.

[0017] According to the technical solution provided in the present application, the transporting of the frame to be tested to the corresponding testing station specifically includes the following steps:

[0018] When the inspection station currently located at the frame to be tested is different from the inspection station of the inspection index of the next component to be tested, the number of the inspection stations corresponding to the inspection index of the next component to be tested is obtained;

[0019] When the number of idle inspection stations corresponding to the inspection index of the component to be tested is greater than or equal to two, obtaining the transportation distance between the current inspection station of the frame to be tested and the idle inspection station;

[0020] The inspection station corresponding to the minimum transportation distance is selected as the designated station, and the vehicle frame to be inspected is transported to the designated station.

[0021] According to the technical solution provided by the present application, the detection database further includes: a vehicle parts distribution map corresponding to each vehicle type;

[0022] After calling the detection database and before searching the detection database for the first detection sequence corresponding to the frame to be tested, the following steps are also included:

[0023] Acquire a first image of the vehicle frame to be tested and a vehicle parts distribution map corresponding to the type of application vehicle to which the vehicle frame to be tested belongs in the detection database; the first image includes the distribution positions of various parts of the vehicle frame to be tested;

[0024] If the distribution positions of the components of the current frame to be tested in the first image are inconsistent with the vehicle component distribution map, the frame to be tested is transported to a secondary assembly area for reassembly.

[0025] According to the technical solution provided by this application, the following steps are also included:

[0026] Calling a vehicle assembly database, and searching the vehicle assembly database for standard assembly images and identification positions of a plurality of assembly positions corresponding to the type of vehicle to which the frame to be tested belongs; the vehicle assembly database at least includes: a plurality of vehicle types and corresponding standard assembly images and identification positions of a plurality of assembly positions;

[0027] Collecting second images of a plurality of assembly positions of the vehicle frame to be tested respectively according to the identified orientations;

[0028] When the second image of the assembly position is different from the corresponding standard assembly image, it is determined that there is an assembly error in the frame to be tested, and the frame to be tested is transported to the secondary assembly area for reassembly.

[0029] According to the technical solution provided by the present application, the inspection indicators of all unqualified parts in the associated component indicator set are repaired, which specifically includes the following steps:

[0030] When the unqualified indicator belongs to the end face detection type, the end face repair operation is performed on the corresponding component;

[0031] When the unqualified indicator belongs to the inspection type of aperture, the corresponding parts are expanded or reduced in size;

[0032] When the detection type to which the unqualified indicator belongs is relative position, the position of the corresponding parts is adjusted.

[0033] In a second aspect, the present application provides a frame component shape detection system, which is used to implement the above-mentioned frame component shape detection method, and the system includes:

[0034] A first detection component, the first detection component includes: a component distribution detection mechanism and a component assembly detection mechanism; the component distribution detection mechanism is used to detect whether the distribution position of each component of the frame to be tested is accurate, and the component assembly detection mechanism is used to detect whether the component assembly position of the frame to be tested is accurate;

[0035] A second detection component, wherein the second detection component is connected to the first detection component through a first conveyor belt, and the second detection component comprises: a plurality of first detection lines, a second detection line and a third detection line connected through a second conveyor belt; the first detection line has a plurality of end face detection stations, and the end face detection stations are provided with an end face detection mechanism for detecting the end face index of parts; the second detection line has a plurality of aperture detection stations, and the aperture detection stations are provided with an aperture detection mechanism for detecting the aperture index of parts; the third detection line has a plurality of relative position detection stations, and the relative position detection stations are provided with a relative position detection mechanism for detecting the relative position index of parts;

[0036] A re-inspection component, which is arranged in the re-inspection area and corresponds to each inspection line and is connected to each inspection line through a third conveyor belt. The re-inspection component includes: a secondary inspection mechanism, which is used to perform secondary inspection on the inspection indicators of the parts in the re-inspection area;

[0037] A frame bearing assembly is transmitted through various conveyor belts; the frame bearing assembly comprises: a bearing platform, on which a rotating clamping mechanism is provided, the rotating clamping mechanism is used to clamp the frame to be tested and rotate relative to the bearing platform to switch the components to be tested of the frame to be tested;

[0038] A processing module, the processing module is communicatively connected with the first detection component, the second detection component, the re-inspection component and the frame supporting component, and is used to control the first detection component, the second detection component and the re-inspection component to perform corresponding detection operations, and control the rotation of the frame supporting component.

[0039] According to the technical solution provided in this application, the component distribution detection mechanism includes:

[0040] A first moving mechanism, the first moving mechanism is installed on the base of the first detection component through a supporting frame, the first moving mechanism includes an annular guide rail arranged on the supporting frame, a movable sliding trolley is provided on the annular guide rail, and the sliding trolley is communicatively connected with the processing module; the sliding trolley is also provided with a lifting component communicatively connected with the processing module, and the lifting component has a mounting end;

[0041] A first image acquisition module is disposed at the mounting end and is in communication with the processing module. The first image acquisition module is used to acquire the distribution positions of various components of the vehicle frame to be tested.

[0042] It can be seen from the above technical solution that the present application has at least the following beneficial effects:

[0043] The present application discloses a method for detecting the shape of vehicle frame parts, the method comprising the following steps: obtaining an identification code of a vehicle frame to be detected, and identifying the application vehicle type to which the vehicle frame to be detected belongs according to the identification code; calling a detection database, and searching the detection database for a first detection sequence corresponding to the vehicle frame to be detected according to the application vehicle type to which the frame to be detected belongs; the detection database at least comprises: a plurality of vehicle types and corresponding first detection sequences, and a set of associated component indicators; the first detection sequence is determined according to component importance parameters and detection indicator importance parameters of the components; each associated component indicator set comprises detection indicators and detection sequences of a plurality of mutually associated components of the application vehicle type; according to the first detection sequence, the vehicle frame to be detected is transferred to a corresponding detection station, Carry out sequential inspection; if the inspection index of the component inspected at the current inspection station is unqualified, mark the inspection index of the component as an abnormal component index and obtain the associated component index set to which the abnormal component index belongs; according to the inspection sequence corresponding to the associated component index set to which the abnormal component index belongs, inspect the inspection index of the uninspected components in the associated component index set in sequence, and when the inspection of the inspection index of the components in the associated component index set is completed, obtain the unqualified rate of the inspection index of the components in the associated component index set except the abnormal component index; when the unqualified rate is zero, transport the frame to be tested to the re-inspection area, and re-inspect the unqualified inspection index of the corresponding components; if the re-inspection result is qualified, generate a detection equipment failure prompt message.

[0044] This application identifies the type of application vehicle to which the frame to be tested belongs based on the identification code of the frame to be tested, obtains the corresponding first detection sequence in the detection database, and performs sequential detection. If the detection index of the component detected by the current detection station is unqualified, the detection index of the component is marked as an abnormal component index and the associated component index set to which the abnormal component index belongs is obtained; according to the detection sequence corresponding to the associated component index set, the detection index of the undetected components in the associated component index set is detected in sequence. When the detection of the detection index in the associated component index set is completed, the unqualified rate of the detection index of the components in the associated component index set except the abnormal component index is obtained; when the unqualified rate is zero, the current frame to be tested is transferred to the re-inspection area, and the detection index of the corresponding unqualified component is re-inspected; if the re-inspection result is qualified, a detection equipment fault prompt information is generated. That is: the detection index of the component is detected according to the corresponding detection sequence, the detection work is reasonably arranged, the misjudgment of the detection result is avoided, and the detection efficiency is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Other features, objects and advantages of the present application will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings.

[0046] Figure 1 The figure is a flow chart of the frame component shape detection method.

[0047] Figure 2 A flowchart to confirm the distribution and assembly positions of parts.

[0048] Figure 3 This is the structural diagram of the frame component shape detection system.

[0049] Numbers in the figure: 10, first detection component; 20, second detection component; 30, re-inspection component; 40, waste collection area; 50, packaging component; 60, repair component; 70, secondary assembly component; 11, first image acquisition module; 12, second image acquisition module; 13, processing module; 14, first moving mechanism; 15, second moving mechanism; 21, end face detection station; 22, aperture detection station; 23, relative position detection station. DETAILED DESCRIPTION

[0050] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0051] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0052] In order to make the description of the following embodiments clear and concise, a brief introduction to the related technology is first given:

[0053] The automobile frame is the basic structural component of the automobile. It undertakes important functions such as supporting the body, protecting passengers and accommodating the power system. The components on the frame, such as beams, columns, connectors, etc., need to be precisely manufactured and assembled to ensure the stability and safety of the entire vehicle. Therefore, it is very important to detect the end faces, apertures and relative positions of the frame components. Traditional detection methods can no longer meet the high efficiency and high quality requirements of modern production. Therefore, we propose a frame component shape detection method to solve the above problems.

[0054] In order to make the technical solution of the present application clearer and easier to understand, the detection system of the present application is first introduced below. Figure 3 As shown in FIG. 1 , this figure is a structural diagram of a frame component shape detection system provided in an embodiment of the present application. The system includes:

[0055] The first detection component 10 includes: a component distribution detection mechanism and a component assembly detection mechanism; the component distribution detection mechanism is used to detect whether the distribution position of each component of the frame to be tested is accurate, and the component assembly detection mechanism is used to detect whether the component assembly position of the frame to be tested is accurate;

[0056] The second detection component 20 is connected to the first detection component 10 through the first conveyor belt, and the second detection component 20 includes: a plurality of first detection lines, a second detection line and a third detection line connected through the second conveyor belt; the number of the first detection line, the second detection line and the third detection line is set according to actual needs; the first detection line has a plurality of end face detection stations 21, and the end face detection station 21 is provided with an end face detection mechanism for detecting the end face index of the component; the second detection line has a plurality of aperture detection stations 22, and the aperture detection station 22 is provided with an aperture detection mechanism for detecting the aperture index of the component; the third detection line has a plurality of relative position detection stations 23, and the relative position detection station 23 is provided with a relative position detection mechanism for detecting the relative position index of the component; here, the end face detection mechanism is, for example, a laser rangefinder or an optical instrument; the aperture detection mechanism is, for example, a micrometer or an internal diameter gauge; the relative position detection mechanism is, for example, a laser tracker.

[0057] The re-inspection component 30 is arranged in the re-inspection area. The re-inspection area is used to receive the frames to be re-inspected. The re-inspection component 30 is arranged corresponding to each detection line and is connected to each detection line through a third conveyor belt. The re-inspection component 30 includes: a secondary detection mechanism. The secondary detection mechanism is used to perform secondary detection on the detection indicators of the parts in the re-inspection area; here, the secondary detection mechanism is a mechanism capable of detecting each detection indicator. The detection result of the secondary detection mechanism is compared with the detection result of the detection mechanism in the corresponding detection line, so as to know whether there is a fault in the detection mechanism on the corresponding detection line, so as to avoid affecting the inspection efficiency and accuracy of the frame to be tested.

[0058] The frame bearing assembly 80 is transmitted through various conveyor belts; the frame bearing assembly 80 includes: a bearing platform, on which a rotating clamping mechanism is provided, which is used to clamp the frame to be tested and rotate relative to the bearing platform to switch the components to be tested of the frame to be tested;

[0059] Among them, the rotating clamping mechanism includes a rotating mechanism and a clamping mechanism that are used in conjunction with each other; the rotating mechanism can rotate relative to the supporting platform; the rotating mechanism has a mounting surface, on which a rotatable clamping mechanism is provided, and the clamping mechanism is used to clamp the frame to be tested; the rotating axis of the rotating mechanism and the rotating axis of the clamping mechanism are vertically arranged; here, the specific structure of the rotating mechanism is, for example: a driving motor installed on the supporting platform, and a turntable connected to the driving shaft of the driving motor, and the surfaces of the turntable and the supporting platform are arranged in parallel; the upper surface of the turntable forms a mounting surface for installing the clamping mechanism. The specific structure of the clamping mechanism is, for example: a first support frame and a second support frame are arranged on the mounting surface, a rotatable first clamping member is arranged on the first support frame, a rotatable second clamping member is arranged on the second support frame, and the first clamping member and the second clamping member cooperate to clamp the frame to be tested; a driving structure is arranged on the first support frame, and its driving shaft is connected with a driving gear, the first clamping member has a clamping end and a mounting end, the clamping end is used to clamp the frame to be tested, and the mounting end is provided with a driven gear, the driving gear and the driven gear are meshed and connected, and the driving gear and the driven gear are driven to rotate by the driving structure, thereby driving the frame to be tested to rotate. Similarly, the second support frame is also provided with the same structure, which will not be described in detail here. The frame to be tested can be rotated to different angles by rotating the turntable and the first clamping member and the second clamping member, so as to facilitate the detection of detection indicators of different components.

[0060] The rotating clamping mechanism may also be a large mechanical arm structure, which can clamp the frame to be tested and drive it to rotate, so as to switch the components to be tested of the frame to be tested.

[0061] The processing module 13 is communicatively connected with the first detection component 10, the second detection component 20, the re-inspection component 30 and the frame supporting component 80, and is used to control the first detection component 10, the second detection component 20, the re-inspection component 30 to perform corresponding detection operations, and control the rotation of the frame supporting component 80.

[0062] Among them, parts distribution detection institutions include:

[0063] The first moving mechanism 14 is installed on the first detection component 10 through a support frame, so that the first moving mechanism 14 is suspended on the base of the first detection component 10, and this base refers to a station for carrying the frame to be tested to detect the distribution position of parts; the first moving mechanism 14 includes an annular guide rail set on the support frame, and a movable sliding trolley is provided on the annular guide rail, and the sliding trolley is connected to the processing module 13 in communication; the sliding trolley is also provided with a lifting component connected to the processing module 13 in communication, and the lifting component has a mounting end; here, the processing module 13 is, for example, an electric control cabinet, which has a single-chip microcomputer inside. The moving direction of the lifting component is vertically arranged to the annular guide rail and the surface of the base.

[0064] The first image acquisition module 11 is arranged at the installation end of the lifting assembly and is in communication connection with the processing module 13. The first image acquisition module 11 is used to acquire the identification code of the frame to be tested or the distribution position of each component of the frame to be tested. The first image acquisition module 11 is, for example, a camera.

[0065] The processing module 13 controls the movement of the sliding trolley and the movement of the lifting assembly, so that the first image acquisition module 11 can fully capture the frame to be tested, and the obtained image with the identification code is transmitted to the processing module 13, and the processing module 13 is used to analyze and obtain the type of application vehicle to which the current frame to be tested belongs; and the first image acquisition module 11 captures the distribution position of each component of the frame to be tested, and the processing module 13 analyzes whether the distribution position of the frame to be tested is accurate.

[0066] Among them, parts assembly inspection institutions include:

[0067] The second moving mechanism 15 is arranged relative to the first moving mechanism 14 and close to the second detection assembly 20; the second moving mechanism 15 includes three guide rails built on the basis of a three-dimensional coordinate system, and the guide rails are arranged along the X axis, Y axis and Z axis of the three-dimensional coordinate system respectively;

[0068] The second image acquisition module 12 is movably mounted on a guide rail arranged along the Z axis, so that the second image acquisition module 12 can be moved to a desired position to capture an image of the assembly position of the vehicle frame to be tested.

[0069] Here, the above three-dimensional coordinate system takes a vertex of the first detection component 10 as the origin, an extension line passing through the origin and parallel to the length direction of the first detection component 10 as the X-axis, an extension line passing through the origin and parallel to the width direction of the first detection component 10 as the Y-axis, and an extension line passing through the origin and perpendicular to both the width direction and the length direction of the first detection component 10 as the Z-axis. Among them, the width direction of the first detection component 10 is parallel to the length direction of each detection line, and the length direction of the first detection component 10 is perpendicular to the length direction of each detection line.

[0070] In addition, the system further comprises: a packaging component 50, which is arranged at the output side of the second detection component 20, and is used to receive and package all frames that pass the detection indicators;

[0071] The waste collection area 40 is disposed adjacent to the packaging assembly 50 and is used to receive unqualified parts removed from the vehicle frame to be tested.

[0072] A repair component 60 is disposed adjacent to the second detection component 20, and the repair component 60 has a repair area for the frame to be tested that needs to be repaired and a mechanism for repairing all detection indicators;

[0073] The secondary assembly component 70 is arranged adjacent to the first detection component 10. The secondary assembly component 70 has a secondary assembly area for receiving the frame to be tested that needs to be reassembled, and an assembly mechanism for reassembling the frame to be tested. The assembled frame can be sent to the first detection component 10 again for subsequent testing.

[0074] It should be noted that the vehicle frames to be tested are transported between the above-mentioned areas via conveyor belts. Since conveyor belts are a well-known structure to those skilled in the art, they will not be described in detail here.

[0075] In order to make the frame component shape detection method provided in the embodiment of the present application clearer and easier to understand, the method is introduced below in conjunction with the accompanying drawings. Figure 1 As shown in the figure, this figure is a flow chart of a frame component shape detection method provided in an embodiment of the present application, the method comprising:

[0076] S100: Obtain an identification code of a vehicle frame to be tested, and identify the type of application vehicle to which the vehicle frame to be tested belongs according to the identification code.

[0077] It should be noted that the identification code of the vehicle frame to be tested can be acquired by the first image acquisition module 11. The identification code corresponding to the application vehicle type to which the vehicle frame to be tested belongs can be formulated by the manufacturer.

[0078] S200, calling a detection database, and searching the detection database for a first detection sequence corresponding to the frame to be tested according to the application vehicle type to which the frame to be tested belongs; the detection database at least includes: multiple vehicle types and corresponding first detection sequences, and a set of associated component indicators; the first detection sequence is determined according to component importance parameters and detection indicator importance parameters of the components; each associated component indicator set includes detection indicators and detection sequences of multiple mutually related components corresponding to the application vehicle type.

[0079] The frame generally includes the front crossbeam, rear crossbeam, side beam, chassis bracket, shock absorber bracket, and frame connector. The components of the frames used by different types of vehicles vary due to their different designs and uses, such as passenger cars, trucks and commercial vehicles, off-road vehicles and SUVs. Compared with passenger cars, the frames of trucks and commercial vehicles are supplemented with reinforcement components to enhance the strength and stability of the overall structure; the frames of off-road vehicles and SUVs are supplemented with reinforced chassis, four-wheel drive systems, protective panels and covers.

[0080] The component importance parameter is used to indicate the importance of each component relative to the performance, safety and durability of the vehicle. The inspection index importance parameter is used to indicate the degree of influence of the inspection index in ensuring the overall accuracy and strength of the component. Here, the inspection index is the end face inspection index, the aperture inspection index or the relative position inspection index.

[0081] The associated component index set refers to a set of detection indexes of components that are connected or adjacent in the overall structure of the vehicle frame. The detection order of the associated component index set is determined according to the component importance parameters and the detection index importance parameters of the components.

[0082] For example, the detection database is shown in Table 1, where "C001", "C002", etc. in Table 1 are used to represent different vehicle types; "D1", "D2", etc. in Table 1 are used to represent the first detection sequence corresponding to different application vehicle types; "G11", "G12", etc. in Table 1 represent different associated component index sets corresponding to different application vehicle types, "G11" represents the first associated component index set of C001, and "G12" represents the second associated component index set of C001; "M1", "M2", etc. in Table 1 represent vehicle parts distribution maps corresponding to different application vehicle types.

[0083] Table 1 Detection database

[0084]

[0085] Since the frame compositions of different vehicle types are different, each frame composition has matching component importance parameters and inspection index importance parameters, which are no longer listed one by one.

[0086] Taking the application vehicle type C001 as an example, its first inspection order is determined according to the component importance parameters and inspection index importance parameters of the components in Table 2. The numbers "6", "5", "4" and so on of the component importance in Table 2 are used to represent the importance of different components to the overall structure of the frame, and the larger the number, the more important it is; the "high" and "medium" of the component influence in Table 2 are used to represent the influence of the inspection index on the corresponding components.

[0087] The first detection sequence of C001 that can be obtained in this way is, for example: end face detection index of the front cross beam, aperture detection index of the front cross beam, end face detection index of the rear cross beam, aperture detection index of the rear cross beam, relative position detection index of the side beam, aperture detection index of the chassis bracket, aperture detection index of the shock absorber bracket, aperture detection index of the frame connecting part, relative position detection index of the frame connecting part, relative position detection index of the front cross beam, relative position detection index of the rear cross beam, end face detection index of the side beam, aperture detection index of the side beam, end face detection index of the chassis bracket, relative position detection index of the chassis bracket, end face detection index of the shock absorber bracket, relative position detection index of the shock absorber bracket.

[0088] It should be noted that since the end face detection index and the aperture detection index in the component influence degree parameters of the front crossbeam are both at the "high" level, the order of these two indicators can be swapped when sorting. Similarly, when the component influence degree parameters of other parts are the same, the detection indicators at the same level can be interchanged and can also be adjusted according to actual conditions.

[0089] Table 2 Component importance parameters and inspection index importance parameters of components corresponding to C001

[0090]

[0091] Further, as shown in Table 1, the detection database also includes: a vehicle parts distribution map corresponding to each vehicle type;

[0092] Among them, Figure 2 As shown, after calling the detection database, before searching the detection database for the first detection sequence corresponding to the frame to be tested, the following steps are also included, namely, the step of confirming the distribution position and assembly position of the parts.

[0093] The specific steps are:

[0094] S201, obtaining a first image of a vehicle frame to be tested and a vehicle parts distribution map corresponding to the type of application vehicle to which the vehicle frame to be tested belongs in a detection database; the first image includes the distribution positions of various parts of the vehicle frame to be tested.

[0095] Here, the first image can be acquired by the first image acquisition module 11, and is used to reflect the actual distribution positions of various components of the current frame to be tested. Taking the vehicle type C001 as an example, its corresponding vehicle component distribution map is M1.

[0096] S202: If the distribution positions of the components of the current frame to be tested in the first image are inconsistent with the vehicle component distribution map, the frame to be tested is transported to a secondary assembly area for reassembly.

[0097] The first image captured by the first image acquisition module 11 is acquired by the processing module 13, and then the first image is compared with the corresponding vehicle parts distribution map. If the distribution position of the frame to be tested in the first image is different from the position in the vehicle parts distribution map, it means that there is an assembly error in the distribution position of the current frame to be tested, and it is transported to the secondary assembly area for reassembly. After the assembly is completed, it is sent to the first detection component 10 for re-detection. If the distribution position of the frame to be tested in the first image is the same as the position in the vehicle parts distribution map, it means that there is no problem with the distribution position of each component of the current frame to be tested, and step S203 can be executed.

[0098] In addition, if Figure 2 As shown, the method also includes the following steps:

[0099] S203, calling a vehicle assembly database, and searching the vehicle assembly database for standard assembly images and identification positions of a plurality of assembly positions corresponding to the application vehicle type to which the frame to be tested belongs; the vehicle assembly database at least includes: a plurality of vehicle types and corresponding standard assembly images and identification positions of a plurality of assembly positions.

[0100] The vehicle assembly database is shown in Table 3. "P11", "P21" and the like in Table 3 are used to represent different assembly positions of different vehicle types. For example, "P11" represents the first assembly position of vehicle type C001. "T11", "T21" and the like in Table 3 are used to represent standard assembly images corresponding to different assembly positions of different vehicle types. For example, "T11" represents the standard assembly image of assembly position P11 of vehicle type C001. "(x 11 ,y 11 , z 11 )”,(x 21 ,y 21 , z 21 )” is used to indicate the recognition orientations corresponding to different standard assembly images of different vehicle types, for example (x 11 ,y 11 , z 11) represents the identification orientation corresponding to the standard assembly image T11. The identification orientation refers to the orientation at which the second image acquisition module 12 can capture an image corresponding to the shooting angle of the standard assembly image.

[0101] Table 3 Vehicle assembly database

[0102]

[0103] S204, collecting second images of multiple assembly positions of the vehicle frame to be tested according to the identified orientations.

[0104] Based on the identification position obtained in S203, the second image acquisition module 12 is used to capture second images of multiple assembly positions of the current vehicle frame to be tested.

[0105] S205: When the second image of the assembly position is different from the corresponding standard assembly image, it is determined that there is an assembly error in the frame to be tested, and the frame to be tested is transported to a secondary assembly area for reassembly.

[0106] The processing module 13 analyzes whether the second image of the assembly position is the same as the corresponding standard assembly image. If they are different, it is determined that there is an assembly error in the current frame to be tested. At this time, the frame to be tested is transferred to the secondary assembly area for reassembly, and then sent to the first detection component 10 for re-detection after the assembly is completed. If they are the same, it indicates that the assembly position of the current frame to be tested is correct, and subsequent detection operations can be performed.

[0107] It should be noted that, when there is no idle inspection station at present, the vehicle frame to be inspected will wait in place until there is an idle inspection station and then be transferred and inspected.

[0108] S300, according to the first inspection sequence, the frame to be tested is transferred to the corresponding inspection station for sequential inspection; if the inspection index of the component inspected by the current inspection station is unqualified, the inspection index of the component is marked as an abnormal component index and the associated component index set to which the abnormal component index belongs is obtained.

[0109] It should be noted that the inspection station is the end surface inspection station 21, the aperture inspection station 22 or the relative position inspection station 23. The associated component index set to which the abnormal component index belongs can be obtained from the inspection database in Table 1.

[0110] The process of transferring the frame to be tested to the corresponding testing station specifically includes the following steps:

[0111] When the inspection station where the frame to be tested is currently located is different from the inspection station of the inspection index of the next component to be tested, the number of the inspection stations corresponding to the inspection index of the next component to be tested is obtained;

[0112] When the number of idle inspection stations corresponding to the inspection index of the component to be tested is greater than or equal to two, the transportation distance between the current inspection station of the frame to be tested and the idle inspection station is obtained;

[0113] The inspection station corresponding to the minimum transportation distance is selected as the designated station, and the frame to be tested is transported to the designated station.

[0114] By identifying the number and transportation distance of the current inspection station where the inspection index of the component to be tested is located and the inspection index of the next component to be tested, the inspection station corresponding to the minimum transportation distance is selected as the designated station, and the current frame to be tested is transferred to the designated station for index testing, thereby shortening the time of the component inspection index transfer process and maximizing the inspection efficiency.

[0115] S400, according to the detection order corresponding to the associated component indicator set to which the abnormal component indicator belongs, the detection indicators of the undetected components in the associated component indicator set are detected in sequence, and when the detection of the detection indicators of the components in the associated component indicator set is completed, the unqualified rate of the detection indicators of the components in the associated component indicator set except the abnormal component indicator is obtained.

[0116] Taking C001 as an example, if the end face detection index of the front beam is unqualified, the associated component index set G11 to which it belongs is obtained. The detection order of G11 is, for example: the end face detection index of the front beam, the aperture detection index of the front beam, the relative position detection index of the side beam, the aperture detection index of the chassis bracket, and the relative position detection index of the chassis bracket.

[0117] After the detection is completed according to the detection sequence of G11, step S500 is executed.

[0118] S500: When the unqualified rate is zero, the vehicle frame to be tested is transferred to a re-inspection area, and the inspection indicators of the corresponding unqualified parts are re-inspected; if the re-inspection result is qualified, a detection equipment failure prompt message is generated.

[0119] If the unqualified rate is zero, it means that there may be no problem with the abnormal component index, but there is a fault in the detection mechanism of the corresponding detection station; at this time, the current frame to be tested is transferred to the re-inspection area, and the abnormal component index is re-inspected. If the re-inspection result is qualified, it is confirmed that there is a fault in the detection mechanism of the corresponding detection station. At this time, a detection equipment fault prompt message is generated to prompt the staff to replace the corresponding detection mechanism, and at the same time, the frame to be tested is transferred to the corresponding detection station to continue the subsequent detection operation. If the re-inspection result is unqualified, it is confirmed that the abnormal component index is unqualified. At this time, the frame to be tested is transferred to the secondary assembly area, the components corresponding to the detection index of the unqualified parts are removed, and new components are assembled and transported to the first detection component 10 for re-inspection.

[0120] Furthermore, the method further comprises the following steps:

[0121] When the unqualified rate of the detection index of the components other than the abnormal component index in the associated component index set is a non-zero value, the frame to be tested is transported to the repair area, and the detection indexes of all unqualified components in the associated component index set are repaired.

[0122] It should be noted that the inspection indicators of all unqualified parts in the associated component indicator set are repaired, specifically including the following steps:

[0123] When the detection type of the unqualified indicator is end face, the end face repair operation is performed on the corresponding component; when the detection type of the unqualified indicator is aperture, the hole expansion or shrinkage operation is performed on the corresponding component; when the detection type of the unqualified indicator is relative position, the position of the corresponding component is adjusted.

[0124] Among them, the repair operations include: end face repair operations, aperture repair operations and relative position repair operations; end face repair operations at least include: grinding or milling, welding repair, surface treatment; aperture repair operations at least include: hole expansion or hole shrinkage, welding or filling; relative position repair operations at least include: adjusting position or flipping parts.

[0125] The above-mentioned repair operation includes measures to remedy the factors that cause the indicators to fail to meet the standards. The repair operation steps for each inspection indicator of each component are applicable.

[0126] The method of repairing the end face inspection index is, for example, to correct the unqualified flatness and size by grinding or milling, or to re-weld or repair the defects of the welded joints, or to perform sandblasting, polishing and other treatments on the parts with unqualified surface roughness.

[0127] The method of repairing the aperture detection index is, for example: if the aperture value obtained by detection is smaller than the minimum value of the preset tolerance range, it indicates that the current aperture is small and an expansion operation is required; if the aperture value obtained by detection is larger than the maximum value of the preset tolerance range, it indicates that the current aperture is large and a shrinkage operation is required; here, the preset tolerance range is set according to actual production needs.

[0128] The method of repairing the relative position detection index is, for example, adjusting the position or flipping the corresponding component.

[0129] Furthermore, the method further comprises the following steps:

[0130] When the unqualified rate of the inspection index of the components other than the abnormal component index in the associated component index set is non-zero and greater than or equal to the first threshold, the frame to be tested is transferred to the corresponding inspection station according to the first inspection sequence, and the repaired frame to be tested is continued to be inspected.

[0131] It should be noted that the failure rate of the detection indicators of the components other than the abnormal component indicators in the associated component indicator set is a non-zero value and is greater than or equal to the first threshold value, which means that: in addition to the abnormal component indicators, there are also unqualified component detection indicators in the associated component indicator set, and the failure rate is relatively large; due to the large failure rate, the component detection indicators in the associated component indicator set have a high risk of affecting the overall performance of the frame. Therefore, after the detection indicators of these unqualified components are repaired, it is still necessary to detect the current frame to be tested in accordance with the first detection order, that is, to perform a secondary inspection on the detection indicators of the repaired components to ensure the accuracy of the detection indicators of the components after repair and to ensure the quality of the frame to be tested.

[0132] Here, the first threshold is, for example, 30%, which can be set according to actual conditions. In addition, if there is no idle inspection station at present, the frame to be tested waits in place until there is an idle inspection station and then is transferred.

[0133] Furthermore, the method further comprises the following steps:

[0134] When the unqualified rate of the detection index of the components other than the abnormal component index in the associated component index set is non-zero and less than the first threshold, the first component index in the associated component index set is obtained; the first component index is the detection index of the components ranked in the last 50% in the first detection sequence;

[0135] The second inspection sequence is obtained by removing the first component index in the first inspection sequence. According to the second inspection sequence, the frame to be tested is transferred to the corresponding inspection station, and the repaired frame to be tested is continuously inspected.

[0136] It should be noted that the failure rate of the detection indicators of the components other than the abnormal component indicators in the associated component indicator set is a non-zero value and is less than the first threshold value, which means that: in addition to the abnormal component indicators, there are also unqualified component detection indicators in the associated component indicator set, and the failure rate is small; due to the small failure rate, the component detection indicators in the associated component indicator set have a relatively low impact on the overall performance of the frame, so the first component indicator in the associated component indicator set, that is, the detection indicator of the components ranked in the last 50% in the first detection sequence, is obtained, and the first component indicator in the first detection sequence is removed to obtain the second detection sequence. According to the second detection sequence, the detection indicators of the repaired components are re-tested to ensure the accuracy of the detection indicators of the components after repair and to ensure the quality of the frame to be tested.

[0137] In addition, if the number of first component indices in the associated component index set is zero, it means that the detection indices of all components in the current associated component index set have a high impact on the overall performance of the frame and require secondary detection, that is, using the detection indices of components that have not been detected in the first detection sequence and the detection indices of all components in the associated component index set, a third detection sequence is generated, and the frame to be tested is detected according to the third detection sequence. The third detection sequence can be determined according to the component importance parameter and the detection index importance parameter of the component.

[0138] Here, if there is no idle inspection station at present, the frame to be inspected will wait in place until there is an idle inspection station and then be transferred.

[0139] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other.

Claims

1. A method for detecting the shape of a vehicle frame component, characterized in that: The following steps are involved: Obtaining an identification code of the vehicle frame to be tested, and identifying the type of application vehicle to which the vehicle frame to be tested belongs according to the identification code; Calling a detection database, and searching the detection database for a first detection sequence corresponding to the vehicle frame to be tested according to the application vehicle type to which the vehicle frame to be tested belongs; The detection database at least includes: a plurality of vehicle types and corresponding first detection sequences and associated component index sets; the first detection sequence is determined according to component importance parameters and detection index importance parameters of the components; each associated component index set includes detection indexes and detection sequences of a plurality of interrelated components corresponding to the applied vehicle type; According to the first detection sequence, the frame to be tested is transferred to the corresponding detection station for sequential detection; if the detection index of the component detected by the current detection station is unqualified, the detection index of the component is marked as an abnormal component index and the associated component index set to which the abnormal component index belongs is obtained; According to the detection order corresponding to the associated component indicator set to which the abnormal component indicator belongs, the detection indicators of the components that have not been detected in the associated component indicator set are detected in sequence, and when the detection indicators of the components in the associated component indicator set are detected, the unqualified rate of the detection indicators of the components in the associated component indicator set except the abnormal component indicator is obtained; When the unqualified rate is zero, the frame to be tested is transferred to a re-inspection area, and the inspection indicators of the corresponding unqualified parts are re-inspected; if the re-inspection result is qualified, a detection equipment failure prompt information is generated.

2. A frame component shape detection method according to claim 1, characterized in that: The following steps are also included: When the unqualified rate of the detection index of the components other than the abnormal component index in the associated component index set is a non-zero value, the frame to be tested is transported to a repair area, and the detection indexes of all unqualified components in the associated component index set are repaired.

3. A frame component shape detection method according to claim 2, characterized in that: The following steps are also included: When the unqualified rate of the inspection index of the components other than the abnormal component index in the associated component index set is non-zero and greater than or equal to the first threshold, the frame to be tested is transferred to the corresponding inspection station according to the first inspection sequence, and the repaired frame to be tested is continued to be inspected.

4. A frame component shape detection method according to claim 2, characterized in that: The following steps are also included: When the unqualified rate of the detection index of the components other than the abnormal component index in the associated component index set is non-zero and less than the first threshold, obtaining the first component index in the associated component index set; the first component index is the detection index of the components ranked in the last 50% in the first detection sequence; A second inspection sequence is obtained by removing the first component index in the first inspection sequence. According to the second inspection sequence, the frame to be tested is transferred to a corresponding inspection station to continue to inspect the repaired frame to be tested.

5. A frame component shape detection method according to any one of claims 1, 3 or 4, characterized in that: The step of transferring the vehicle frame to be tested to a corresponding testing station specifically includes the following steps: When the inspection station currently located at the frame to be tested is different from the inspection station of the inspection index of the next component to be tested, the number of the inspection stations corresponding to the inspection index of the next component to be tested is obtained; When the number of idle inspection stations corresponding to the inspection index of the component to be tested is greater than or equal to two, obtaining the transportation distance between the current inspection station of the frame to be tested and the idle inspection station; The inspection station corresponding to the minimum transportation distance is selected as the designated station, and the vehicle frame to be inspected is transported to the designated station.

6. A frame component shape detection method according to claim 1, characterized in that: The detection database also includes: a vehicle parts distribution map corresponding to each vehicle type; After calling the detection database and before searching the detection database for the first detection sequence corresponding to the frame to be tested, the following steps are also included: Acquire a first image of the vehicle frame to be tested and a vehicle parts distribution map corresponding to the type of application vehicle to which the vehicle frame to be tested belongs in the detection database; the first image includes the distribution positions of various parts of the vehicle frame to be tested; If the distribution positions of the components of the current frame to be tested in the first image are inconsistent with the vehicle component distribution map, the frame to be tested is transported to a secondary assembly area for reassembly.

7. A frame component shape detection method according to claim 6, characterized in that: The following steps are also included: Calling a vehicle assembly database, and searching the vehicle assembly database for standard assembly images and identification positions of a plurality of assembly positions corresponding to the type of application vehicle to which the frame to be tested belongs; The vehicle assembly database includes at least: standard assembly images of multiple vehicle types and corresponding multiple assembly positions and their identification orientations; Collecting second images of a plurality of assembly positions of the vehicle frame to be tested respectively according to the identified orientations; When the second image of the assembly position is different from the corresponding standard assembly image, it is determined that there is an assembly error in the frame to be tested, and the frame to be tested is transported to the secondary assembly area for reassembly.

8. A frame component shape detection method according to claim 2, characterized in that: Repairing the detection indicators of all unqualified parts in the associated component indicator set specifically includes the following steps: When the unqualified indicator belongs to the end face detection type, the end face repair operation is performed on the corresponding component; When the unqualified indicator belongs to the inspection type of aperture, the corresponding parts are expanded or reduced in size; When the detection type to which the unqualified indicator belongs is relative position, the position of the corresponding parts is adjusted.

9. A vehicle frame component shape detection system, used to implement a vehicle frame component shape detection method according to any one of claims 1 to 8, characterized in that: The system comprises: A first detection component (10), the first detection component (10) comprising: a component distribution detection mechanism and a component assembly detection mechanism; the component distribution detection mechanism is used to detect whether the distribution position of each component of the frame to be tested is accurate, and the component assembly detection mechanism is used to detect whether the component assembly position of the frame to be tested is accurate; a second detection assembly (20), wherein the second detection assembly (20) and the first detection assembly (10) are connected via a first conveyor belt, and the second detection assembly (20) comprises: a plurality of first detection lines, a second detection line and a third detection line connected via the second conveyor belt; the first detection line comprises a plurality of end surface detection stations (21), the end surface detection stations (21) being provided with an end surface detection mechanism for detecting end surface indicators of components; the second detection line comprises a plurality of aperture detection stations (22), the aperture detection stations (22) being provided with an aperture detection mechanism for detecting aperture indicators of components; the third detection line comprises a plurality of relative position detection stations (23), the relative position detection stations (23) being provided with a relative position detection mechanism for detecting relative position indicators of components; A re-inspection component (30), the re-inspection component (30) being arranged in the re-inspection area, being arranged corresponding to each inspection line, and the re-inspection component (30) and each inspection line being connected via a third conveyor belt, the re-inspection component (30) comprising: a secondary inspection mechanism, for performing a secondary inspection on the inspection indexes of the parts in the re-inspection area; A frame bearing assembly (80) is transported via various conveyor belts; the frame bearing assembly (80) comprises: a bearing platform, the bearing platform being provided with a rotary clamping mechanism, the rotary clamping mechanism being used to clamp the frame to be tested and rotate relative to the bearing platform to switch the components to be tested of the frame to be tested; A processing module (13), the processing module (13) being communicatively connected with the first detection component (10), the second detection component (20), the re-inspection component (30) and the frame bearing component (80), and being used for controlling the first detection component (10), the second detection component (20) and the re-inspection component (30) to perform corresponding detection operations, and controlling the frame bearing component (80) to rotate.

10. A vehicle frame component shape detection system according to claim 9, characterized in that: The parts distribution detection mechanism comprises: a first moving mechanism (14), the first moving mechanism (14) being mounted on a base of the first detection component (10) via a supporting frame, the first moving mechanism (14) comprising an annular guide rail arranged on the supporting frame, a movable sliding trolley being provided on the annular guide rail, the sliding trolley being communicatively connected to the processing module (13); a lifting component being also provided on the sliding trolley and being communicatively connected to the processing module (13), the lifting component having a mounting end; A first image acquisition module (11), the first image acquisition module (11) being arranged at the mounting end and being in communication connection with the processing module (13), the first image acquisition module (11) being used to acquire the distribution position of each component of the vehicle frame to be tested.

Images