A safety mass detection system and method for a vehicle

Abstract

The application relates to the technical field of old motor vehicle detection and evaluation, and discloses a vehicle safety quality detection system and method, which comprises a data collection module, a vehicle information acquisition module, a vehicle detection module and a data output module. The vehicle safety quality detection system and method can comprehensively scan the vehicle chassis and the paint surface appearance through a vehicle chassis scanning unit and a vehicle appearance scanning unit, calculate the loss coefficient and the wear coefficient respectively, calculate the final vehicle residual value by combining the wear coefficient, the loss coefficient and the initial vehicle residual value, and simultaneously feed back the three kinds of data to a used car evaluator through the data output module, so that the used car evaluator can accurately and quickly report the loss degree and the price of the target vehicle to the user, and meanwhile, the used car evaluator can avoid evaluating the target vehicle by experience and naked eye observation, the partial defects can be found, the evaluation deviation can be avoided, and the economic losses of the consumer and the used car operator can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of old motor vehicle detection and evaluation, in particular to a vehicle safety quality detection system and method. BACKGROUND

[0002] A used car refers to a motor vehicle registered with the public security traffic management department, which is still in service before reaching the state's prescribed retirement standard or within the economic service life and can continue to be used. With the growth of the number of used cars in China, the source of long-term used cars also increases year by year. In 2021, the proportion of car models with more than 10 years of age increased by 2.11 percentage points compared with the same period last year, a total of 2.85 million transactions, with a growth of 29.1% over the same period last year. Therefore, the used car market in China is large.

[0003] At present, the residual value evaluation of used cars in China usually relies on the comprehensive detection of the vehicle by the evaluator to determine the current market value and potential problems of the vehicle. Usually, the used car evaluator evaluates the used car by relying on personal experience and part of the handheld device to measure the vehicle appearance, and combines the vehicle appearance and condition observed by the naked eye to evaluate it. This evaluation method will cause the evaluation to deviate due to the undetected part of the vehicle, thereby causing economic losses to consumers and used car operators SUMMARY

[0004] (I) Technical problems solved

[0005] In view of the shortcomings of the prior art, the present application provides a vehicle safety quality detection system and method, which avoids the phenomenon that the used car evaluator evaluates the target vehicle by experience and naked eye observation, resulting in part of the defects not being found, the evaluation deviating, and thereby causing economic losses to consumers and used car operators, etc. The above technical problems are solved.

[0006] (II) Technical solutions

[0007] In order to achieve the above-mentioned purpose, the present application provides the following technical solutions: a vehicle safety quality detection system, comprising a data collection module, a vehicle information acquisition module, a vehicle detection module and a data output module;

[0008] Among them, the data collection module collects the depreciation rate of different brands of cars and the depreciation rate of different colors of cars through big data cloud connection, and takes the car brand depreciation rate as the brand depreciation coefficient And the car color depreciation rate as the color depreciation coefficient , the brand depreciation coefficient is divided into , , ... The color depreciation coefficient Classified by car color , , ... and the brand devaluation coefficient and color depreciation coefficient Stored in the vehicle information collection module;

[0009] The vehicle information collection module includes a vehicle identification number (VIN) recognition and parsing unit and a vehicle residual value calculation unit. The VIN recognition and parsing unit connects to a cloud-based vehicle VIN parsing platform to parse the VIN of the target vehicle and obtain basic vehicle information. Based on the basic vehicle information obtained by the VIN recognition and parsing unit, the vehicle residual value calculation unit selects a brand depreciation coefficient corresponding to the vehicle's brand and color. subsets and color devaluation coefficients The subsets are combined to calculate the initial value of the vehicle residual value. and the initial value of the vehicle's residual value Feedback is sent to the vehicle detection module;

[0010] The vehicle inspection module includes a vehicle chassis scanning unit, a vehicle exterior scanning unit, and a vehicle residual value calculation unit. The vehicle chassis scanning unit is used to scan the vehicle chassis and its components, and to calculate the loss coefficient of the vehicle chassis wear. The vehicle exterior scanning unit is used to scan the vehicle's paint surface and calculate the wear coefficient of the paint surface wear. The vehicle residual value final calculation unit is used to receive the initial calculated value of the vehicle residual value. The vehicle residual value is then calculated by combining it with the loss coefficient and wear coefficient. The vehicle residual value final calculation unit then calculates the final vehicle residual value. Loss coefficient and wear coefficient Transmitted to the data output module;

[0011] The data output module is used to output the final residual value of the vehicle. Loss coefficient of the target vehicle and wear coefficient The data is fed back to the used car appraiser in numerical form.

[0012] Preferably, the vehicle identification and parsing unit analyzes the target vehicle's VIN to obtain the vehicle's brand, color, production year, and original price information, using the original price as a price coefficient. The service life is calculated by subtracting the production year from the current year. Service life coefficient The calculation formula is:

[0013] Brand depreciation coefficient in the formula Based on the brand of the target vehicle, select the corresponding subset of the brand and substitute it to calculate the usage of vehicles of that brand. Years after that year, the coefficient of lifespan .

[0014] Preferably, the initial residual value of the vehicle The calculation formula is:

[0015]

[0016] Brand depreciation coefficient in the formula Select the corresponding subset based on the brand of the target vehicle and substitute it into the color depreciation coefficient. Based on the target vehicle's color, a corresponding subset is selected and substituted into the formula. This formula calculates the initial residual value of the vehicle based on its basic information. The initial residual value of the vehicle The vehicle residual value is transmitted from the vehicle residual value calculation unit to the vehicle inspection module, which then calculates the vehicle residual value. It is allocated to the vehicle residual value final calculation unit for storage.

[0017] Preferably, the vehicle chassis scanning unit scans the vehicle chassis to obtain chassis scanning parameters, including the original chassis area, the damaged chassis area, and the deformed chassis area, and calculates the loss coefficient of the vehicle chassis based on the vehicle chassis scanning parameters. ;

[0018] The loss coefficient Obtain it using the following formula:

[0019] *100%

[0020] In the formula, For the area of ​​chassis damage, For chassis deformation area, Given the original chassis area, the loss coefficient is derived based on the percentage of the damaged and deformed areas of the chassis relative to the original chassis area. .

[0021] Preferably, the vehicle exterior scanning unit scans the vehicle's exterior paint surface to obtain vehicle exterior paint surface parameters, including the vehicle paint surface area, the vehicle paint surface scratch area, and the vehicle paint surface color difference area, and calculates the wear coefficient of the vehicle paint surface wear based on the vehicle exterior paint surface parameters. ;

[0022] The wear coefficient Obtain it using the following formula:

[0023] *100%

[0024] In the formula, For the area of ​​color difference in vehicle paint, For the area of ​​scratches on the vehicle paint, The wear coefficient is calculated based on the percentage of the vehicle's painted surface area, including the area of ​​color difference and the area of ​​scratches relative to the total painted surface area. .

[0025] Preferably, the vehicle chassis scanning unit calculates the loss coefficient. The data is transmitted to the vehicle residual value final calculation unit for storage.

[0026] Preferably, the vehicle exterior scanning unit calculates the wear coefficient. The data is transmitted to the vehicle residual value final calculation unit for storage.

[0027] Preferably, the vehicle residual value final calculation unit receives the initial vehicle residual value. And the initial value of the vehicle's residual value With loss coefficient and wear coefficient Combined calculations to determine the final residual value of the vehicle ;

[0028] The final residual value of the vehicle It can be obtained through the following formula:

[0029]

[0030] The formula means that the final residual value calculation unit of the vehicle is based on the initial residual value of the vehicle. Loss coefficient with chassis wear abrasion coefficient of vehicle paint surface wear Multiply them to obtain the final residual value of the target vehicle;

[0031] The vehicle residual value final calculation unit will calculate the final residual value of the vehicle. The results are transmitted to the data output module.

[0032] Preferably, the data output module outputs the calculated final value of the vehicle residual value. The numerical values ​​are visually fed back to the used car appraiser via a display screen, and the depreciation coefficient is also displayed. Values ​​and wear coefficients The numerical values ​​are simultaneously displayed visually to the used car appraiser on a monitor.

[0033] Loss coefficient The numerical range is between 0 and 1, where 1 indicates that the vehicle chassis is intact and 0 indicates that the vehicle chassis is completely damaged. Among them, 0.9 and above is excellent, 0.7 to 0.9 (excluding 0.9) is good, 0.6 to 0.7 (excluding 0.7) is passable, and less than 0.6 is unqualified.

[0034] Wear coefficient The numerical range is between 0 and 1, where 1 indicates that the vehicle's paint appearance is intact, and 0 indicates that the vehicle's paint appearance is completely damaged. Among them, 0.8 and above is excellent, 0.65 to 0.8 (excluding 0.8) is good, 0.5 to 0.65 (excluding 0.65) is acceptable, and less than 0.65 is unacceptable.

[0035] Preferably, a vehicle safety quality testing method includes the following steps:

[0036] S1. The data collection module collects the brand depreciation coefficient of different car brands and the color depreciation coefficient of different car colors and stores them in the vehicle information collection module.

[0037] S2. The vehicle identification number (VIN) recognition and parsing unit in the vehicle information collection module identifies and analyzes the basic information of the target vehicle and transmits the basic vehicle information to the vehicle residual value calculation unit.

[0038] S3. The vehicle residual value calculation unit matches the corresponding brand depreciation coefficient based on the vehicle's basic information. subsets and color devaluation coefficients A subset of the set, and calculate the initial residual value of the vehicle according to the calculation formula, and then set the initial residual value of the vehicle... Feedback is sent to the vehicle residual value final calculation unit in the vehicle inspection module;

[0039] S4. The vehicle chassis scanning unit and the vehicle exterior scanning unit in the vehicle detection module scan the chassis and exterior paint of the target vehicle respectively, and obtain the wear coefficient of the vehicle chassis. abrasion coefficient of vehicle paint surface wear and loss coefficient and wear coefficient Feedback is sent to the vehicle residual value final calculation unit;

[0040] S5. The vehicle residual value final calculation unit calculates the initial vehicle residual value according to the calculation formula. Loss coefficient and wear coefficient Substitute the values ​​and calculate the final residual value of the vehicle. The vehicle residual value final calculation unit will calculate the final residual value of the vehicle. Loss coefficient and wear coefficient Feedback is sent to the data output module;

[0041] S6, The data output module will output the final value of the vehicle residual value. Loss coefficient Values ​​and wear coefficients The numerical values ​​are visually fed back to the used car appraiser via a display screen.

[0042] Compared with the prior art, the present invention provides a vehicle safety quality inspection system and method, which has the following beneficial effects:

[0043] 1. This invention uses a vehicle chassis scanning unit and a vehicle exterior scanning unit to perform a comprehensive scan of the target vehicle's chassis and paint surface, and calculates the loss coefficients from the scan results. and wear coefficient The final residual value of the vehicle is calculated in conjunction with the wear coefficient. Loss coefficient and preliminary residual value of the vehicle Calculate the final residual value of the vehicle The system outputs these three types of data to the used car appraiser simultaneously, enabling the appraiser to accurately and quickly report the wear and tear and price of the target vehicle to the user. This avoids situations where appraisers rely on experience and visual observation to assess the target vehicle, which may result in some defects going undetected and valuations being inaccurate, thus causing economic losses to consumers and used car dealers.

[0044] 2. This invention uses a vehicle identification number (VIN) recognition and parsing unit that connects to the cloud for VIN parsing. This eliminates the need for used car appraisers to manually input the VIN into software on their mobile phones or computers to query the basic information of the target vehicle. Based on the basic information, the appraiser can query the original selling price and depreciation rate of the target vehicle, and then calculate the initial residual value of the vehicle based on the information retrieved. This avoids manually inputting values ​​one by one to calculate the initial residual value of the vehicle, shortening the calculation time for the initial residual value of the vehicle, so that the vehicle can quickly enter the vehicle inspection stage. Attached Figure Description

[0045] Fig. 1 This is a schematic diagram of the structural system of the present invention;

[0046] Fig. 2 This is a schematic diagram of the structure and method of the present invention; Detailed Implementation

[0047] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0048] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0049] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0050] Please see Figs. 1-2 A vehicle safety and quality inspection system, comprising:

[0051] This includes a data collection module. Since different brands and colors of used vehicles depreciate at different rates, this module connects to a big data cloud to collect data on the depreciation rates of different brands and colors of vehicles, using the brand depreciation rate as a brand depreciation coefficient. And the car color depreciation rate as the color depreciation coefficient Among them, the brand depreciation coefficient It is a large dataset, whose subsets are divided according to car brands. , , ... Color depreciation coefficient It is also a large set, whose subsets are divided according to car color. , , ... The data collection module will collect the brand devaluation coefficient. Depreciation coefficient of sets and colors The data is stored in the vehicle information collection module so that the module can quickly match relevant information.

[0052] The vehicle information collection module includes a VIN (Vehicle Identification Number) recognition and parsing unit and a vehicle residual value calculation unit. The VIN recognition and parsing unit is connected to a vehicle VIN parsing cloud platform. Used car appraisers upload the target vehicle's VIN information through the VIN recognition unit, and the VIN recognition and parsing unit uploads the VIN image to the vehicle VIN parsing cloud platform to retrieve information such as the vehicle's brand, color, production year, and original price. The original price is used as a price coefficient. The target vehicle's service life is calculated by subtracting the production year from the current year. Years coefficient The calculation formula is: The brand depreciation coefficient in the formula Select a subset of vehicles with the same brand as the target vehicle and substitute it into the calculation to obtain the age coefficient of the target vehicle. The vehicle residual value calculation unit is based on the initial vehicle residual value. Calculation formula for calculating the initial residual value of the target vehicle ,

[0053] The calculation formula is as follows: The initial value of the vehicle residual value was obtained. The vehicle residual value calculation unit will calculate the initial residual value of the vehicle. The results are transmitted to the vehicle detection module.

[0054] By connecting to the cloud-based vehicle identification number (VIN) analysis unit, used car appraisers no longer need to manually input the VIN into software on their phones or computers to retrieve basic information about the target vehicle. Instead, they can retrieve the original selling price and depreciation rate based on the information, and then calculate the initial residual value of the vehicle. This avoids manually inputting values ​​one by one to calculate the initial residual value, shortening the calculation time and allowing the vehicle to quickly enter the vehicle inspection stage.

[0055] The vehicle inspection module includes a vehicle chassis scanning unit, a vehicle exterior scanning unit, and a vehicle residual value calculation unit;

[0056] The vehicle chassis scanning unit is used to scan the vehicle chassis and its components, including the original area, damaged area, and deformed area of ​​the target vehicle chassis. The damaged area includes scratches, oil leaks, and battery punctures in new energy vehicles, providing objective feedback on the chassis's working condition. The deformed area includes areas where the chassis has been scraped or impacted, such as dents. The dent area reflects the impact damage to the chassis. Based on the damaged area and deformed area, a loss coefficient is calculated for the chassis. The formula for calculating the loss coefficient is as follows: *100%, in the formula, Represents the loss coefficient. Represents the area of ​​chassis damage, Represents the chassis deformation area, Representing the original area of ​​the chassis, the vehicle chassis scanning unit calculates the wear coefficient of the vehicle chassis based on the scanning results, and judges the integrity of the vehicle chassis based on the vehicle chassis wear coefficient. The judgment criteria are as follows:

[0057] Loss coefficient The numerical range is between 0 and 1, where 1 indicates the vehicle chassis is intact and 0 indicates the vehicle chassis is completely damaged. A value of 0.9 or higher is excellent, 0.7 to 0.9 (excluding 0.9) is good, 0.6 to 0.7 (excluding 0.7) is passable, and less than 0.6 is unacceptable. (This refers to a wear coefficient.) The numerical value fully reflects the degree of chassis wear of the target vehicle. If the wear coefficient... If the price is too low, it will cause the target vehicle to depreciate significantly.

[0058] The vehicle exterior scanning unit scans the paint surface of the target vehicle to obtain parameters such as the paint surface area, scratch area, and color difference area. The scratch area refers to the total area of ​​minor scratches on the paint surface, while the color difference area reflects the total area of ​​paint repairs, such as accident repairs or scratch repairs. The vehicle exterior scanning unit calculates the wear coefficient of the vehicle's paint surface based on the scratch area and color difference area. The calculation formula is as follows: , in the formula, This represents the area of ​​color difference in the vehicle's paint. Represents the area of ​​scratches on the vehicle's paint. Represents the surface area of ​​the vehicle's paintwork, thus based on the wear coefficient. The criteria for judging the integrity of a vehicle's exterior are as follows:

[0059] The numerical range is between 0 and 1, where 1 indicates that the vehicle's paint appearance is intact, and 0 indicates that the vehicle's paint appearance is completely damaged. Among them, 0.8 and above is excellent, 0.65 to 0.8 (excluding 0.8) is good, 0.5 to 0.65 (excluding 0.65) is acceptable, and less than 0.65 is unacceptable.

[0060] The vehicle chassis scanning unit will calculate the loss coefficient. Wear coefficient calculated by the vehicle exterior scanning unit Simultaneously, the data is transmitted to the vehicle residual value final calculation unit for storage. The vehicle residual value final calculation unit receives the wear coefficient... and loss coefficient Then, the wear coefficient and loss coefficient Compared with the initial value of vehicle residual value Based on the calculated final residual value of the vehicle, the formula for calculating the final residual value of the vehicle is as follows: In the initial calculation of the vehicle's residual value Based on the reference wear coefficient and loss coefficient Preliminary calculation of vehicle residual value The final residual value of the vehicle, which is consistent with the actual wear and tear of the target vehicle, is obtained through recalculation. and the final residual value of the vehicle Wear coefficient and loss coefficient Transmitted to the data output module;

[0061] The data output module provides visual feedback on the final residual value of the vehicle to the used car appraiser through its display. Wear coefficient and loss coefficient Used car appraisers base their assessments on wear and tear coefficients. and loss coefficient Objectively provide customers with feedback on the current degree of wear and tear of the target vehicle, based on the vehicle's final residual value. Provide customers with feedback on the current residual value of the target vehicle;

[0062] The vehicle chassis scanning unit and the vehicle exterior scanning unit perform a comprehensive scan of the target vehicle's chassis and paint surface, and calculate the loss coefficient from the scan results. and wear coefficient The final residual value of the vehicle is calculated in conjunction with the wear coefficient. Loss coefficient and preliminary residual value of the vehicle Calculate the final residual value of the vehicle. The system outputs these three types of data to the used car appraiser simultaneously, enabling the appraiser to accurately and quickly report the wear and tear and price of the target vehicle to the user. This avoids situations where appraisers rely on experience and visual observation to assess the target vehicle, resulting in some defects going unnoticed and valuations being inaccurate, which could lead to economic losses for consumers and used car dealers.

[0063] A method for safety and quality testing of vehicles includes the following steps:

[0064] S1. The data collection module collects the brand depreciation coefficient of different car brands and the color depreciation coefficient of different car colors and stores them in the vehicle information collection module.

[0065] S2. The vehicle identification number (VIN) recognition and parsing unit in the vehicle information collection module identifies and analyzes the basic information of the target vehicle and transmits the basic vehicle information to the vehicle residual value calculation unit.

[0066] S3. The vehicle residual value calculation unit matches the corresponding brand depreciation coefficient based on the vehicle's basic information. subsets and color devaluation coefficients A subset of the set, and calculate the initial residual value of the vehicle according to the calculation formula, and then set the initial residual value of the vehicle... Feedback is sent to the vehicle residual value final calculation unit in the vehicle inspection module;

[0067] S4. The vehicle chassis scanning unit and the vehicle exterior scanning unit in the vehicle detection module scan the chassis and exterior paint of the target vehicle respectively, and obtain the wear coefficient of the vehicle chassis. abrasion coefficient of vehicle paint surface wear and loss coefficient and wear coefficient Feedback is sent to the vehicle residual value final calculation unit;

[0068] S5. The vehicle residual value final calculation unit calculates the initial vehicle residual value according to the calculation formula. Loss coefficient and wear coefficient Substitute the values ​​and calculate the final residual value of the vehicle. The vehicle residual value final settlement unit will calculate the vehicle's residual value. Loss coefficient and wear coefficient Feedback is sent to the data output module;

[0069] S6, The data output module will output the final value of the vehicle residual value. Loss coefficient Values ​​and wear coefficients The numerical values ​​are visually fed back to the used car appraiser via a display screen.

[0070] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vehicle safety and quality inspection system, characterized in that: It includes a data collection module, a vehicle information collection module, a vehicle detection module, and a data output module; The data collection module uses a big data cloud connection to collect depreciation rates for different car brands and different colors, and uses the car brand depreciation rate as a brand depreciation coefficient. And the car color depreciation rate as the color depreciation coefficient The brand depreciation coefficient Classified by car brand , , ... The color depreciation coefficient Classified by car color , , ... and the brand devaluation coefficient and color depreciation coefficient Stored in the vehicle information collection module; The vehicle information collection module includes a vehicle identification number (VIN) recognition and parsing unit and a vehicle residual value calculation unit. The VIN recognition and parsing unit connects to a cloud-based vehicle VIN parsing platform to parse the VIN of the target vehicle and obtain basic vehicle information. Based on the basic vehicle information obtained by the VIN recognition and parsing unit, the vehicle residual value calculation unit selects a brand depreciation coefficient corresponding to the vehicle's brand and color. subsets and color devaluation coefficients The subsets are combined to calculate the initial value of the vehicle residual value. and the initial value of the vehicle's residual value Feedback is sent to the vehicle detection module; The vehicle identification and parsing unit analyzes the target vehicle's VIN to obtain the vehicle's brand, color, production year, and original price information, using the original price as a price coefficient. The service life is calculated by subtracting the production year from the current year. Service life coefficient The calculation formula is: = ； Brand depreciation coefficient in the formula Based on the brand of the target vehicle, select the corresponding subset of the brand and substitute it to calculate the usage of vehicles of that brand. Service life coefficient after 20 years ; The initial calculation of the vehicle's residual value The calculation formula is: ； Brand depreciation coefficient in the formula Select the corresponding subset based on the brand of the target vehicle and substitute it into the color depreciation coefficient. Based on the target vehicle's color, a corresponding subset is selected and substituted into the formula. This formula calculates the initial residual value of the vehicle based on its basic information. The initial residual value of the vehicle The vehicle residual value is transmitted from the vehicle residual value calculation unit to the vehicle inspection module, which then calculates the vehicle residual value. The data is allocated and stored within the vehicle residual value final calculation unit. The vehicle inspection module includes a vehicle chassis scanning unit, a vehicle exterior scanning unit, and a vehicle residual value calculation unit. The vehicle chassis scanning unit is used to scan the vehicle chassis and its components, and to calculate the loss coefficient of the vehicle chassis wear. The vehicle exterior scanning unit is used to scan the vehicle's paint surface and calculate the wear coefficient of the paint surface wear. The vehicle residual value final calculation unit is used to receive the initial calculated value of the vehicle residual value. The vehicle residual value is then calculated by combining it with the loss coefficient and wear coefficient. The vehicle residual value final calculation unit then calculates the final vehicle residual value. Loss coefficient and wear coefficient Transmitted to the data output module; The vehicle chassis scanning unit scans the vehicle chassis to obtain chassis scanning parameters, including the original chassis area, damaged chassis area, and deformed chassis area, and calculates the loss coefficient of the vehicle chassis based on the chassis scanning parameters. ; The loss coefficient Obtain it using the following formula: *100%； In the formula, For the area of ​​chassis damage, For chassis deformation area, The original chassis area is used as the basis for calculating the loss coefficient, which is derived from the percentage of the damaged and deformed areas of the chassis relative to the original chassis area. ; The vehicle exterior scanning unit scans the vehicle's paint surface to obtain parameters, including the paint surface area, scratch area, and color difference area. Based on these parameters, it calculates the wear coefficient of the vehicle's paint surface. ; The wear coefficient Obtain it using the following formula: *100%； In the formula, For the area of ​​color difference in vehicle paint, For the area of ​​scratches on the vehicle paint, The wear coefficient is calculated based on the percentage of the vehicle's painted surface area, including the area of ​​color difference and the area of ​​scratches relative to the total painted surface area. ; The vehicle residual value final calculation unit receives the initial vehicle residual value. And the initial value of the vehicle's residual value With loss coefficient and wear coefficient Combined calculations to determine the final residual value of the vehicle ; The final residual value of the vehicle It can be obtained through the following formula: ； The formula means that the final residual value calculation unit of the vehicle is based on the initial residual value of the vehicle. Loss coefficient related to vehicle chassis wear abrasion coefficient of vehicle paint surface wear Multiply them to obtain the final residual value of the target vehicle; The vehicle residual value final calculation unit will calculate the final vehicle residual value. The results are transmitted to the data output module; The data output module is used to output the final residual value of the vehicle. Loss coefficient of the target vehicle and wear coefficient The data is fed back to the used car appraiser in numerical form.

2. The vehicle safety and quality inspection system according to claim 1, characterized in that: The vehicle chassis scanning unit will calculate the loss coefficient. The data is transmitted to the vehicle residual value final calculation unit for storage.

3. The vehicle safety and quality inspection system according to claim 2, characterized in that: The vehicle exterior scanning unit will calculate the wear coefficient. The data is transmitted to the vehicle residual value final calculation unit for storage.

4. The testing method based on the vehicle safety and quality testing system according to any one of claims 1-3, characterized in that: Includes the following steps: S1. The data collection module collects the brand depreciation coefficient of different car brands and the color depreciation coefficient of different car colors and stores them in the vehicle information collection module. S2. The vehicle identification number (VIN) recognition and parsing unit in the vehicle information collection module identifies and analyzes the basic information of the target vehicle and transmits the basic vehicle information to the vehicle residual value calculation unit. S3. The vehicle residual value calculation unit matches the corresponding brand depreciation coefficient based on the vehicle's basic information. subsets and color devaluation coefficients A subset of the set, and calculate the initial residual value of the vehicle according to the calculation formula, and then set the initial residual value of the vehicle... Feedback is sent to the vehicle residual value final calculation unit in the vehicle inspection module; S4. The vehicle chassis scanning unit and the vehicle exterior scanning unit in the vehicle detection module scan the chassis and exterior paint of the target vehicle respectively, and obtain the wear coefficient of the vehicle chassis. abrasion coefficient of vehicle paint surface wear and loss coefficient and wear coefficient Feedback is sent to the vehicle residual value final calculation unit; S5. The vehicle residual value final calculation unit calculates the initial vehicle residual value according to the calculation formula. Loss coefficient and wear coefficient Substitute the values ​​and calculate the final residual value of the vehicle. The vehicle residual value final calculation unit will calculate the final residual value of the vehicle. Loss coefficient and wear coefficient Feedback is sent to the data output module; S6, The data output module will output the final value of the vehicle residual value. Loss coefficient Values ​​and wear coefficients The numerical values ​​are visually fed back to the used car appraiser via a display screen.

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