阅读说明：本技术 一种二手车检测系统及检测方法 (Second-hand vehicle detection system and detection method ) 是由 陈凯镔 陶沙沙 向峻伯 王从明 余东 于 2021-08-18 设计创作，主要内容包括：本发明公开了一种二手车检测系统及检测方法,检测系统包括；车辆信息获取模块,用于获取车辆的历史检测数据及历史维修数据,并获得车辆的故障缺陷；漆面厚度检测模块,用于获取车辆的漆面厚度,并获得车辆的漆面缺陷；车辆扫描模块,用于获取车辆的结构扫描图像,并获得车辆的结构缺陷；数据处理模块,用于对车辆的故障缺陷、漆面缺陷和结构缺陷进行综合分析,获得车辆的综合检测结果。本发明能够获得二手车比较客观的数据,用户根据车辆的综合检测结果,可更加准确的判断二手车的状况。本发明无需依赖于相关人员的主观检测,可以更加客观的对二手车进行评判,尽可能提高二手车车况的准确性,降低二手车的交易风险。(The invention discloses a second-hand vehicle detection system and a detection method, wherein the detection system comprises; the vehicle information acquisition module is used for acquiring historical detection data and historical maintenance data of the vehicle and acquiring fault defects of the vehicle; the paint thickness detection module is used for acquiring the paint thickness of the vehicle and acquiring the paint defects of the vehicle; the vehicle scanning module is used for acquiring a structure scanning image of the vehicle and acquiring the structure defect of the vehicle; and the data processing module is used for comprehensively analyzing the fault defect, the paint surface defect and the structural defect of the vehicle to obtain a comprehensive detection result of the vehicle. The invention can obtain more objective data of the used vehicle, and the user can more accurately judge the condition of the used vehicle according to the comprehensive detection result of the vehicle. The invention does not need to rely on subjective detection of related personnel, can more objectively judge the used cars, improves the accuracy of the used cars as much as possible, and reduces the transaction risk of the used cars.)

1. A used vehicle detection system, comprising:

the vehicle information acquisition module is used for acquiring historical detection data and historical maintenance data of the vehicle and acquiring fault defects of the vehicle according to the historical detection data and the historical maintenance data of the vehicle;

the paint thickness detection module is used for obtaining the paint thickness of the vehicle and obtaining the paint defects of the vehicle according to the paint thickness of the vehicle;

the vehicle scanning module is used for acquiring a structure scanning image of a vehicle, and comparing the structure scanning image of the vehicle with a structure scanning image of a standard vehicle to acquire the structure defect of the vehicle;

and the data processing module is used for comprehensively analyzing the fault defect, the paint surface defect and the structural defect of the vehicle to obtain a comprehensive detection result of the vehicle.

2. The used vehicle detection system according to claim 1, wherein the vehicle information acquisition module comprises:

a vehicle identification unit for acquiring a vehicle identification code of a vehicle;

the information acquisition unit is used for acquiring historical detection data and historical maintenance data of the vehicle from a cloud according to the vehicle identification code of the vehicle;

and the fault analysis unit is used for analyzing the historical detection data and the historical maintenance data of the vehicle to obtain the fault defect of the vehicle.

3. The used vehicle detection system according to claim 1, wherein the paint finish thickness detection module comprises:

the paint thickness detection unit is used for detecting the paint thickness of different positions of the vehicle;

and the paint surface analysis unit is used for calculating the average paint surface thickness of the vehicle according to the paint surface thicknesses of different positions of the vehicle, comparing the average paint surface thickness of the vehicle with the paint surface thickness of a standard vehicle and obtaining the paint surface defect of the vehicle.

4. The used vehicle detection system according to claim 3, wherein the paint surface analysis unit is further configured to compare the paint surface thicknesses of different positions of the vehicle with the paint surface thickness of a standard vehicle to obtain the paint surface defect of the vehicle.

5. The second-hand vehicle detection system according to claim 3, wherein the paint surface thickness detection unit comprises a detection probe (4) and two opposite supporting vertical plates (1), a supporting transverse plate (2) is arranged between the two supporting vertical plates (1), the supporting transverse plate (2) is connected with the two supporting vertical plates (1) in a sliding manner, and the supporting transverse plate (2) is provided with a driving mechanism for driving the sliding transverse plate (2) to slide; support and be equipped with a plurality of regulating arms on diaphragm (2) side by side, the one end of regulating arm rotates with support diaphragm (2) to be connected, and the other end of regulating arm is connected with fixing base (3), set up on fixing base (3) test probe (4).

6. The second-hand vehicle detection system according to claim 5, wherein the adjusting arm comprises a rotary connector (5), a first supporting arm (6), a first joint (7), a second supporting arm (8), a second joint (9) and a third supporting arm (10), one end of the first supporting arm (6) is rotatably connected with the supporting transverse plate (2) through the rotary connector (5), the other end of the first supporting arm (6) is rotatably connected with one end of the second supporting arm (8) through the first joint (7), the other end of the second supporting arm (8) is rotatably connected with one end of the third supporting arm (10) through the second joint (9), and the other end of the third supporting arm (10) is connected with the fixing seat (3); the first supporting arm (6), the second supporting arm (8) and the third supporting arm (10) are all telescopic supporting arms.

7. The used vehicle detection system according to claim 5, characterized in that the driving mechanism comprises a driving motor (11), the driving motor (11) is installed on the supporting transverse plate (2), the output end of the driving motor (11) is connected with a driving gear (12), and the supporting vertical plate (1) is provided with a rack (13) matched with the driving gear (12); a sliding assembly is arranged between the supporting vertical plate (1) and the supporting transverse plate (2); the sliding assembly comprises a limiting sliding rail (14) and a sliding seat (15), the sliding seat (15) is arranged at each of two ends of the supporting transverse plate (2), the limiting sliding rail (14) is arranged on the supporting vertical plate (1), and the limiting sliding rail (14) is in sliding fit with the sliding seat (15); and a limiting baffle (16) is arranged at the end part of the limiting slide rail (14).

8. A second-hand vehicle detection method is characterized by comprising the following steps:

acquiring historical detection data and historical maintenance data of the vehicle, and acquiring fault defects of the vehicle according to the historical detection data and the historical maintenance data of the vehicle;

obtaining the thickness of the finish of the vehicle, and obtaining the finish defect of the vehicle according to the thickness of the finish of the vehicle;

obtaining a structure scanning image of a vehicle, and comparing the structure scanning image of the vehicle with a structure scanning image of a standard vehicle to obtain the structure defect of the vehicle;

and comprehensively analyzing the fault defects, the paint surface defects and the structural defects of the vehicle to obtain a comprehensive detection result of the vehicle.

9. The used vehicle detection method according to claim 8, wherein the step of obtaining historical detection data and historical maintenance data of the vehicle and obtaining fault defects of the vehicle according to the historical detection data and the historical maintenance data of the vehicle comprises the steps of:

acquiring a vehicle identification code of a vehicle;

acquiring historical detection data and historical maintenance data of the vehicle from a cloud according to the vehicle identification code of the vehicle;

and analyzing the historical detection data and the historical maintenance data of the vehicle to obtain the fault defect of the vehicle.

10. The used vehicle detection method according to claim 8, wherein the obtaining of the paint thickness of the vehicle and the obtaining of the paint defect of the vehicle according to the paint thickness of the vehicle comprises:

detecting the thickness of the paint surface at different positions of the vehicle;

the method comprises the steps of calculating the average paint thickness of a vehicle according to the paint thicknesses of different positions of the vehicle, comparing the average paint thickness of the vehicle with the paint thickness of a standard vehicle, comparing the paint thicknesses of different positions of the vehicle with the paint thickness of the standard vehicle, and judging that the vehicle has paint defects when the average paint thickness of the vehicle is larger than a threshold value of the paint thickness of the standard vehicle or the paint thicknesses of different positions of the vehicle are larger than a threshold value of the paint thickness of the standard vehicle.

Technical Field

The invention relates to the technical field of vehicle detection, in particular to a second-hand vehicle detection system and a detection method.

Background

Along with the improvement of the living standard of people, the demand of people on automobiles is increased, the market of second-hand vehicles is gradually expanded, and particularly, the development of a second-hand vehicle e-commerce platform gradually breaks through the mutual circulation among all areas of second-hand vehicles in China, the second-hand vehicles are more and more convenient to buy and sell, and the cross-area circulation is obviously increased. The second-hand vehicles are generally divided into old vehicles and accident vehicles, a large number of water soaking vehicles, accident refurbishing vehicles and the like are frequently distributed to various regions in rainy seasons in the south, and a scientific, effective and unified second-hand vehicle detection system does not exist in China at present, so that higher difficulty is brought to the identification of the technical conditions of the second-hand vehicles. A large number of accident cars are put into the market for transaction after being renovated, original accident traces are often covered due to the fact that information between sellers and buyers is asymmetric and some accident cars are changed, consumers lacking professional knowledge can easily buy the accident cars, the accident cars have great threat to personal safety of the consumers, and sustainable development of the second-hand car industry is not facilitated.

For the detection of the used vehicle, the sequence from outside to inside and from front to back is followed, firstly, the appearance of the vehicle needs to be checked, the damage degree of the vehicle is judged by observing the paint surface condition of the vehicle, whether wrinkles exist and the traces of paint repair, then the structure of the vehicle body is checked, and any displacement or traces of screw replacement can be the basis of the over-impact. At present, the detection of the used cars mainly depends on subjective judgment of related personnel, and generally adopts detection modes such as eye-watching, ear-listening, hand-touching and the like, however, the detection mode has low detection efficiency, the detection result has high subjectivity, and the value of the used cars cannot be accurately evaluated.

Disclosure of Invention

In order to solve the above problems in the prior art, the present invention provides a used vehicle detection system and a detection method.

In order to achieve the above object, in one aspect, the present invention adopts the following technical solutions: a used vehicle detection system, comprising:

the vehicle information acquisition module is used for acquiring historical detection data and historical maintenance data of the vehicle and acquiring fault defects of the vehicle according to the historical detection data and the historical maintenance data of the vehicle;

the paint thickness detection module is used for obtaining the paint thickness of the vehicle and obtaining the paint defects of the vehicle according to the paint thickness of the vehicle;

the vehicle scanning module is used for acquiring a structure scanning image of a vehicle, and comparing the structure scanning image of the vehicle with a structure scanning image of a standard vehicle to acquire the structure defect of the vehicle;

and the data processing module is used for comprehensively analyzing the fault defect, the paint surface defect and the structural defect of the vehicle to obtain a comprehensive detection result of the vehicle.

As an alternative of the present invention, the vehicle information acquisition module includes:

a vehicle identification unit for acquiring a vehicle identification code of a vehicle;

the information acquisition unit is used for acquiring historical detection data and historical maintenance data of the vehicle from a cloud according to the vehicle identification code of the vehicle;

and the fault analysis unit is used for analyzing the historical detection data and the historical maintenance data of the vehicle to obtain the fault defect of the vehicle.

As an alternative of the present invention, the paint thickness detection module includes:

the paint thickness detection unit is used for detecting the paint thickness of different positions of the vehicle;

and the paint surface analysis unit is used for calculating the average paint surface thickness of the vehicle according to the paint surface thicknesses of different positions of the vehicle, comparing the average paint surface thickness of the vehicle with the paint surface thickness of a standard vehicle and obtaining the paint surface defect of the vehicle.

As an alternative of the invention, the paint surface analyzing unit is further configured to compare the paint surface thickness of different positions of the vehicle with the paint surface thickness of a standard vehicle to obtain the paint surface defect of the vehicle.

As an alternative of the invention, the paint surface thickness detection unit comprises a detection probe and two oppositely arranged support vertical plates, a support transverse plate is arranged between the two support vertical plates, the support transverse plate is connected with the two support vertical plates in a sliding manner, and the support transverse plate is provided with a driving mechanism for driving the support transverse plate to slide; the support diaphragm is last to be equipped with a plurality of regulating arms side by side, the one end of regulating arm rotates with the support diaphragm to be connected, and the other end of regulating arm is connected with the fixing base, set up on the fixing base detect probe.

As an alternative of the invention, the adjusting arm comprises a rotary connector, a first supporting arm, a first joint, a second supporting arm, a second joint and a third supporting arm, one end of the first supporting arm is rotatably connected with the supporting transverse plate through the rotary connector, the other end of the first supporting arm is rotatably connected with one end of the second supporting arm through the first joint, the other end of the second supporting arm is rotatably connected with one end of the third supporting arm through the second joint, and the other end of the third supporting arm is connected with the fixed seat; the first supporting arm, the second supporting arm and the third supporting arm are all telescopic supporting arms.

As an alternative of the present invention, the driving mechanism includes a driving motor, the driving motor is mounted on the supporting transverse plate, the output end of the driving motor is connected with a driving gear, and the supporting vertical plate is provided with a rack adapted to the driving gear.

As an alternative of the invention, a sliding assembly is arranged between the supporting vertical plate and the supporting transverse plate; the sliding assembly comprises a limiting sliding rail and a sliding seat, the sliding seat is arranged at each of two ends of the supporting transverse plate, the limiting sliding rail is arranged on the supporting vertical plate, and the limiting sliding rail is in sliding fit with the sliding seat; and the end part of the limiting slide rail is provided with a limiting baffle.

On the other hand, the invention adopts the following technical scheme: a used vehicle detection method comprises the following steps:

acquiring historical detection data and historical maintenance data of the vehicle, and acquiring fault defects of the vehicle according to the historical detection data and the historical maintenance data of the vehicle;

obtaining the thickness of the finish of the vehicle, and obtaining the finish defect of the vehicle according to the thickness of the finish of the vehicle;

obtaining a structure scanning image of a vehicle, and comparing the structure scanning image of the vehicle with a structure scanning image of a standard vehicle to obtain the structure defect of the vehicle;

and comprehensively analyzing the fault defects, the paint surface defects and the structural defects of the vehicle to obtain a comprehensive detection result of the vehicle.

As an alternative of the present invention, acquiring historical inspection data and historical repair data of a vehicle, and acquiring a fault defect of the vehicle according to the historical inspection data and the historical repair data of the vehicle, includes:

acquiring a vehicle identification code of a vehicle;

acquiring historical detection data and historical maintenance data of the vehicle from a cloud according to the vehicle identification code of the vehicle;

and analyzing the historical detection data and the historical maintenance data of the vehicle to obtain the fault defect of the vehicle.

As an alternative of the present invention, obtaining a paint thickness of a vehicle and obtaining a paint defect of the vehicle according to the paint thickness of the vehicle includes:

detecting the thickness of the paint surface at different positions of the vehicle;

the method comprises the steps of calculating the average paint thickness of a vehicle according to the paint thicknesses of different positions of the vehicle, comparing the average paint thickness of the vehicle with the paint thickness of a standard vehicle, comparing the paint thicknesses of different positions of the vehicle with the paint thickness of the standard vehicle, and judging that the vehicle has paint defects when the average paint thickness of the vehicle is larger than a threshold value of the paint thickness of the standard vehicle or the paint thicknesses of different positions of the vehicle are larger than a threshold value of the paint thickness of the standard vehicle.

The invention has the beneficial effects that:

the invention provides a second-hand vehicle detection system and a second-hand vehicle detection method. The invention can obtain more objective data of the used vehicle, and the user can more accurately judge the condition of the used vehicle according to the comprehensive detection result of the vehicle. Compared with the prior art, the method and the device do not need to rely on subjective detection of related personnel, can objectively judge the used cars, improve the accuracy of the used cars as much as possible, and reduce the transaction risk of the used cars.

Drawings

FIG. 1 is a schematic structural diagram of a paint thickness detecting unit according to an embodiment of the present invention;

FIG. 2 is a top view of a paint thickness detection unit in accordance with an embodiment of the present invention;

1-supporting a vertical plate; 2-supporting the transverse plate; 3-fixing the base; 4-detecting the probe; 5-rotating the connector; 6-a first support arm; 7-a first joint; 8-a second support arm; 9-a second joint; 10-a third support arm; 11-a drive motor; 12-a drive gear; 13-a rack; 14-a limit slide rail; 15-sliding seat; 16-limit baffle.

Detailed Description

Examples

The embodiment provides a second-hand vehicle detection system which comprises a vehicle information acquisition module, a paint surface thickness detection module, a vehicle scanning module and a data processing module.

The vehicle information acquisition module is used for acquiring historical detection data and historical maintenance data of the vehicle and acquiring fault defects of the vehicle according to the historical detection data and the historical maintenance data of the vehicle. Specifically, the vehicle information acquisition module includes a vehicle identification unit, an information acquisition unit, and a failure analysis unit. The vehicle identification unit may employ a photographing device for acquiring a vehicle identification code of the vehicle. The English of the vehicle identification code is abbreviated as VIN code, the vehicle identification code is a group of seventeen letters or numbers, is used for a group of unique numbers on the automobile, and can identify the manufacturer of the automobile, the engine, the chassis serial number and other performance data. The information acquisition unit is used for acquiring historical detection data and historical maintenance data of the vehicle from a cloud according to the vehicle identification code of the vehicle; the information acquisition unit sends the vehicle identification code to the cloud server, and the cloud server inquires various historical data of the vehicle corresponding to the vehicle identification code and transmits the historical data to the information acquisition unit, and the various historical data of the vehicle comprise detection data, historical maintenance data and the like, so that a user can know the defects of the vehicle. The historical detection data comprises vehicle maintenance records, vehicle emergency records and vehicle historical vehicle condition information, and the historical maintenance data of the vehicle comprises names of frame components and mechanical components for vehicle maintenance and maintenance types. The fault analysis unit is used for analyzing the historical detection data and the historical maintenance data of the vehicle to obtain the fault defect of the vehicle.

The paint thickness detection module is used for obtaining the paint thickness of the vehicle and obtaining the paint defects of the vehicle according to the paint thickness of the vehicle. The vehicle may have accidents to cause local maintenance, so the thickness of the paint surface of the vehicle may be uneven, and the paint surface defect of the vehicle can be roughly judged according to the thickness of the paint surface of different places of the vehicle. Specifically, the paint thickness detection module comprises a paint thickness detection unit and a paint analysis unit. The paint thickness detection unit is used for detecting the paint thicknesses of different positions of the vehicle, and the paint analysis unit is used for calculating the average paint thickness of the vehicle according to the paint thicknesses of the different positions of the vehicle and comparing the average paint thickness of the vehicle with the paint thickness of a standard vehicle to obtain the paint defects of the vehicle. Marking a plurality of positions of the vehicle, detecting the paint thickness of the marked positions after marking is finished, and then calculating the average paint thickness of the vehicle. Preferably, the paint surface analyzing unit is further used for comparing the paint surface thickness of different positions of the vehicle with the paint surface thickness of a standard vehicle to obtain the paint surface defect of the vehicle. Because the vehicle may be painted again, the paint surface thicknesses of different positions of the vehicle are respectively compared with the paint surface thickness of a standard vehicle, and the difference value is calculated, so that the defect condition of the paint surface of the vehicle can be further judged.

The vehicle scanning module is used for acquiring a structure scanning image of a vehicle, and comparing the structure scanning image of the vehicle with a structure scanning image of a standard vehicle to acquire the structure defect of the vehicle. Specifically, the scanning device comprises a metal flaw detector or an X-ray machine, and is used for acquiring a structure scanning image of the vehicle, and comparing the structure scanning image of the vehicle with a structure scanning image of a standard vehicle to acquire the structure defects of the vehicle. When the vehicle is used for a long time or an accident occurs, the structure of the vehicle may be deformed, and the structure scanning image of the vehicle is compared with the structure scanning image of a standard vehicle, so that a user can accurately know the condition of the vehicle, and the value of the used vehicle can be evaluated more accurately.

The data processing module is used for comprehensively analyzing the fault defects, the paint defects and the structural defects of the vehicle to obtain comprehensive detection results of the vehicle. The detection system can obtain objective data of the used vehicle, and the user can more accurately judge the condition of the used vehicle according to the comprehensive detection result of the vehicle. Compared with the prior art, the method and the device do not need to rely on subjective detection of related personnel, can objectively judge the used cars, improve the accuracy of the used cars as much as possible, and reduce the transaction risk of the used cars.

As shown in fig. 1 and fig. 2, in this embodiment, the paint thickness detecting unit includes a detecting probe 4 and two opposite supporting vertical plates 1, a supporting horizontal plate 2 is disposed between the two supporting vertical plates 1, the supporting horizontal plate 2 is slidably connected to the two supporting vertical plates 1, and the supporting horizontal plate 2 is provided with a driving mechanism for driving the sliding of the supporting horizontal plate 2. Two support risers 1 and support diaphragm 2 form the U-shaped, and the vehicle stops between two support risers 1 during the detection to support diaphragm 2 and be located the vehicle top. The driving mechanism drives the supporting transverse plate 2 to slide up and down along the supporting vertical plate 1, so that the supporting transverse plate 2 is close to or far away from the vehicle to be detected. Support and be equipped with a plurality of regulating arms on the diaphragm 2 side by side, the one end of regulating arm rotates with support diaphragm 2 to be connected, and the other end of regulating arm is connected with fixing base 3, set up on the fixing base 3 detect probe 4. The position and the angle of the detection probe 4 can be adjusted by the adjusting arm, so that the detection probe 4 can smoothly complete the detection of the thickness of the paint surface of the vehicle, and the vehicle can be evaluated conveniently. The second-hand vehicle is likely to have local maintenance, so the paint surface thickness of different positions of the vehicle needs to be detected, the supporting transverse plate 2 is provided with the plurality of adjusting arms side by side, the detecting probes 4 on the plurality of adjusting arms can detect different positions of the vehicle at the same time, and a detection result is obtained after comparison, so that the operation is simple, the manual labor intensity is reduced, and the detection efficiency of the second-hand vehicle is improved.

As shown in fig. 1, specifically, the regulating arm includes rotating connector 5, first support arm 6, first joint 7, second support arm 8, second joint 9 and third support arm 10, the one end of first support arm 6 is passed through rotating connector 5 rotates with support diaphragm 2 and is connected, and the other end of first support arm 6 rotates through the one end of first joint 7 with second support arm 8 and is connected, the other end of second support arm 8 rotates through the one end of second joint 9 with third support arm 10 and is connected, the other end and the fixing base 3 of third support arm 10 are connected. First support arm 6, second support arm 8 and third support arm 10 set gradually from the top down, have a plurality of degrees of freedom for the position and the angle of test probe 4 can be adjusted at will, convenience of customers greatly to the detection of vehicle finish thickness. Preferably, the first support arm 6, the second support arm 8 and the third support arm 10 are telescopic support arms, and the telescopic support arms are realized by adopting telescopic rod technology, so that the adjusting position and angle of the detection probe 4 can be further increased.

As shown in fig. 2, the driving mechanism includes a driving motor 11, the driving motor 11 is installed on the supporting horizontal plate 2, the output end of the driving motor 11 is connected with a driving gear 12, and the supporting vertical plate 1 is provided with a rack 13 adapted to the driving gear 12. Driving motor 11 is gear motor, and driving motor 11 is fixed in the lateral wall that supports diaphragm 2, and driving motor 11's output fixed connection drive gear 12, and the lateral wall that supports riser 1 sets up rack 13, and rack 13 is connected with drive gear 12 meshing, and driving motor 11 orders about drive gear 12 and rotates, realizes supporting diaphragm 2's up-and-down motion.

Support riser 1 with be equipped with the slip subassembly between the support diaphragm 2, make the up-and-down motion of supporting diaphragm 2 more smooth and easy. Further, the slip subassembly includes spacing slide rail 14 and sliding seat 15, the both ends that support diaphragm 2 all set up sliding seat 15, set up on the support riser 1 spacing slide rail 14, the tip of spacing slide rail 14 is equipped with limit baffle 16, spacing slide rail 14 and sliding seat 15 sliding fit guarantee to support diaphragm 2 can be stable slide from top to bottom along spacing slide rail 14 to adjust and support diaphragm 2, so that each detection probe 4 detects the lacquer painting thickness of the different positions of vehicle.

When the paint surface thickness of the vehicle is detected, a user firstly marks the position of the vehicle to be detected, then adjusts the position of the supporting transverse plate 2 through the driving mechanism to enable the supporting transverse plate 2 to gradually approach the vehicle, the supporting transverse plate 2 stops moving after reaching a certain position, and the user adjusts each adjusting arm to enable the position of the detecting probe 4 to approach the mark point of the vehicle, so that the paint surface thickness of the vehicle is detected. Because the shapes of different parts of the vehicle are different, the positions and the angles of the detection probes 4 are different during detection, and the positions and the angles of the detection probes 4 can be conveniently and rapidly adjusted through the adjusting arms, so that the thickness detection of the paint surface of the vehicle can be rapidly completed. The user obtains the average paint surface thickness of vehicle according to the paint surface thickness of the different positions of vehicle, compare the average paint surface thickness of vehicle with the paint surface thickness of standard vehicle to and compare the paint surface thickness of the different positions of vehicle with the paint surface thickness of standard vehicle, when the difference of the average paint surface thickness of vehicle and the paint surface thickness of standard vehicle is greater than the settlement threshold value, or when the difference of the paint surface thickness of the different positions of vehicle and the paint surface thickness of standard vehicle is greater than the settlement threshold value, judge that this vehicle has the paint surface defect, obtain the second-hand car and detect the result. The paint surface thickness detection unit is simple in structure and convenient to operate, and greatly improves the convenience of second-hand vehicle detection.

The embodiment also provides a used vehicle detection method, which is applied to the used vehicle detection system and comprises the following steps:

s1, the vehicle information acquisition module acquires the historical detection data and the historical maintenance data of the vehicle, and acquires the fault defect of the vehicle according to the historical detection data and the historical maintenance data of the vehicle, and the fault defect acquisition module comprises:

s11, the vehicle identification unit acquires the vehicle identification code of the vehicle;

s12, the information acquisition unit acquires historical detection data and historical maintenance data of the vehicle from the cloud according to the vehicle identification code of the vehicle;

and S13, analyzing the historical detection data and the historical maintenance data of the vehicle by the fault analysis unit to obtain the fault defect of the vehicle.

S2, the paint thickness detection module obtains the paint thickness of the vehicle and obtains the paint defect of the vehicle according to the paint thickness of the vehicle, and the paint thickness detection module comprises:

and S21, detecting the thickness of the painted surface at different positions of the vehicle by the painted surface thickness detection unit.

And S22, the paint surface analyzing unit calculates the average paint surface thickness of the vehicle according to the paint surface thicknesses of different positions of the vehicle, compares the average paint surface thickness of the vehicle with the paint surface thickness of a standard vehicle, compares the paint surface thicknesses of different positions of the vehicle with the paint surface thickness of the standard vehicle, and judges that the vehicle has paint surface defects when the average paint surface thickness of the vehicle is greater than the threshold value of the paint surface thickness of the standard vehicle or the paint surface thicknesses of different positions of the vehicle are greater than the threshold value of the paint surface thickness of the standard vehicle.

And S3, the vehicle scanning module acquires a structure scanning image of the vehicle, and compares the structure scanning image of the vehicle with the structure scanning image of the standard vehicle to acquire the structure defect of the vehicle.

And S4, the data processing module comprehensively analyzes the fault defect, the paint surface defect and the structural defect of the vehicle to obtain a comprehensive detection result of the vehicle. The detection method can obtain objective data of the used vehicle, and the user can more accurately judge the condition of the used vehicle according to the comprehensive detection result of the vehicle.

In the description of the present invention, the terms "mounted," "connected," "fixed," and the like are to be understood broadly and may be fixedly connected, detachably connected, or integrated; may be a mechanical or electrical connection; either directly or indirectly through intervening media, either internally or in any other relationship. Those skilled in the art will understand the specific meaning of the above terms in the present invention. Furthermore, the particular features, structures, etc. described in the examples can be included in at least one implementation and can be combined by one skilled in the art without conflicting therewith. The protection scope of the present invention is not limited to the above specific examples, and embodiments that can be imagined by those skilled in the art without creative efforts based on the basic technical concept of the present invention belong to the protection scope of the present invention.