CN201111052Y - Appraisal and evaluation device for old motor vehicles - Google Patents

Abstract

The utility model belongs to the field of motor vehicle transactions and relates to an identification and evaluation device for used motor vehicles. The device includes an information input component, a controller, and an information output component; wherein the controller further includes a database interface module, an initial input interface, a management module, a vehicle technical appraisal module to be evaluated, a new car comparison module of the same model, and an evaluation module. A calculation module, a transaction price neural network calculation module and an output interface management module connected with the output device. During use of the identification and evaluation device, an operator inputs identification and evaluation information, and the device analyzes and processes the identification and evaluation information to obtain an identification and evaluation result; and finally outputs the identification and evaluation result. The utility model can effectively overcome the unfair behavior in the identification and evaluation of old motor vehicles caused by human subjective factors, thereby improving the accuracy, objectivity and fairness of the identification and evaluation results and greatly improving the identification and evaluation efficiency.

Description

Appraisal and evaluation device for old motor vehicles

technical field

The utility model belongs to the field of motor vehicle transactions, in particular to a used motor vehicle identification and evaluation device for evaluating the value of the old motor vehicle and giving a reference price of the old motor vehicle according to the evaluation result.

Background technique

With the vigorous development of the old motor vehicle trade, the identification and valuation of the old motor vehicle becomes more and more important. Appraisal and valuation of old motor vehicles is a complicated and highly technical work.

There are basically two categories of users of used motor vehicle appraisal and valuation: one is courts, banks, insurance companies and other institutions, and both parties to direct transactions (direct transactions refer to the types of transactions that do not go through the market), they need to Carry out objective realistic value assessment, the other is for the parties involved in the transaction of old motor vehicles. This type of users will involve many factors such as market prosperity, transaction taxes, maintenance costs, and operating profits. Motor vehicle transactions are different from second-hand housing transactions. In the process of second-hand housing transactions, the costs and profits of both buyers and sellers are clear, and they are separately accounted for. However, in the process of transactions through the old motor vehicle market, various taxes and fees are often incorporated into the purchase price and sales price of the market. , not counted separately. Since these two types of users have different purposes for evaluating prices, the evaluation values will also be different. For a long time, the identification and valuation of old motor vehicles has basically been processed by hand. Due to the large amount of data to be processed in the process of identification and valuation, the identification and valuation personnel have to spend a lot of time collecting, sorting, analyzing and storing various information materials.

Utility model content

In order to reduce the labor intensity of appraisal and appraisal personnel, improve work efficiency, overcome the unfair behavior in the appraisal and appraisal of old motor vehicles caused by human subjective factors, and improve the accuracy, objectivity and fairness of appraisal and appraisal results, the utility model provides an old Motor vehicle identification evaluation device.

The technical solution adopted by the utility model to solve the first technical problem in the existing technical problems is: to provide an old motor vehicle identification and evaluation device, the device includes: an information input component for inputting identification and evaluation information; A controller for analyzing and processing the identification evaluation information; an information output component for displaying the identification evaluation results; wherein the controller further includes: a database for storing data information, and a database interface module connected to the database; An initial, input interface, and management module for invoking input information, initializing the control device, and performing background management on the control device; a technical appraisal module for the vehicle to be evaluated for calculating the technical appraisal coefficient of the vehicle to be evaluated; It is a new car comparison module of the same model that compares the vehicle to be evaluated with its new car of the same model; it is used to evaluate the input information and evaluate it in combination with the technical appraisal coefficient of the vehicle to be evaluated and the new car comparison parameters of the same model An evaluation calculation module; a transaction price neural network calculation module for providing transaction price references for car owners according to the evaluation calculation results, and an output interface management module connected with the output device.

According to a preferred embodiment of the present invention: the control device further includes: an appraisal and evaluation form module for printing the appraisal and evaluation data in the system.

According to a preferred embodiment of the present invention: the appraisal and evaluation information includes vehicle condition appraisal and evaluation standards, basic information of vehicles to be evaluated, basic information of new cars, and added value information of vehicles.

According to a preferred embodiment of the present invention: a new car performance parameter database and an old motor vehicle valuation history record database.

According to a preferred embodiment of the present utility model: the initial and input interface management module is the presentation layer of the system, including system interface design, input format of each business process, real-time view generated according to the system and management of the system background Work.

According to a preferred embodiment of the present utility model: the input member is a keyboard.

According to a preferred embodiment of the present utility model: the output member is a display screen.

According to a preferred embodiment of the present invention: the output component is a printer connected to the appraisal form module.

The beneficial effects of the utility model are: by applying computer technology and information technology to appraisal and valuation work, not only can the relevant information be processed conveniently and quickly, the labor intensity of appraisal and appraisal personnel can be reduced, work efficiency can be improved, and basic information can also be Conduct preliminary data analysis to provide data basis for judgment, decision-making and other work. In addition, the use of the old motor vehicle appraisal and evaluation device can overcome the current old motor vehicle appraisal and appraisal that relies heavily on the personal level and experience of the appraisal and appraisal personnel, reduce the errors that are prone to occur in the process of manual information processing, and can also overcome as much as possible Human subjective factors lead to unfair behavior in appraisal and appraisal of old motor vehicles, thereby improving the accuracy, objectivity and fairness of appraisal and appraisal results.

Description of drawings

Fig. 1. the utility model a kind of old motor vehicle identification and evaluation device structure schematic diagram of identification and evaluation system;

Fig. 2. the identification and evaluation method flowchart in a kind of old motor vehicle identification and evaluation device of the utility model;

Fig. 3. Flowchart of the development method of the identification and evaluation device of the present utility model;

Fig. 4. The structural diagram of the B/S system of the appraisal and evaluation device of the present utility model;

Fig. 5. A frame structure diagram of the appraisal and evaluation device of the present utility model.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

According to the current situation of the evaluation of old motor vehicles in the market, the scope of application of the four commonly used asset evaluation methods, namely, the replacement cost method, the income present value method, the current market price method and the liquidation price method, is systematically analyzed, and the imperfections are analyzed. Improvements have been made to evaluate different vehicles using different methods. The system adopts a modular structure, forming component modules for various general functional components, and providing code reuse. Considering the need of system upgrading, the utility model adopts a three-layer architecture design of data layer, business interface layer and presentation layer. The presentation layer is the interface for customers to interact with the system; the business layer implements the entire evaluation logic process and role management, authority assignment, identity authentication, rule application, task decision-making, transaction processing and process control according to customer requests, and also manages all related Database access rules, and determine service management methods to achieve security assurance; the data layer mainly uses relational databases, through rules definition, constraints, concurrency control and other mechanisms to ensure the integrity and consistency of system data.

Please refer to FIG. 1, a structural schematic diagram of an identification and evaluation device of an old motor vehicle identification and evaluation device of the present utility model. As shown in Figure 1, the old motor vehicle appraisal and evaluation device includes: an information input component 101 for inputting appraisal and appraisal information; a controller 102 for analyzing and processing the appraisal and appraisal information; information for displaying appraisal and appraisal results Output component 103; wherein the controller 102 further includes: a database for storing data information, a database interface module 104 connected to the database; used to call input information, and can initialize and control the control device The initial, input interface, and management module for the background management of the device; the vehicle technical appraisal module 106 for calculating the technical appraisal coefficient of the vehicle to be evaluated; the new car comparison of the same model for comparing the vehicle to be evaluated with its new car of the same model Module 107; evaluation and calculation module 108 for performing evaluation on the input information and evaluating in combination with the technical evaluation coefficient of the vehicle to be evaluated and the comparison parameters of the new car of the same model; A transaction price neural network calculation module 109 that provides a transaction price reference and an output interface management module connected to the output device, the controller 102 further includes: an identification evaluation for printing the identification evaluation data in the system Forms form module 111.

Common modules include: database interface module 104; initial, input, output, management modules 105, 110; evaluation calculation module 108; appraisal evaluation form module 111; transaction price neural network calculation module 109. The independent modules include: a vehicle technical appraisal module to be evaluated; a new car comparison module 107 of the same model.

Among them, the database interface module 104: is the data layer component of the system. A low-level module that implements data communication with the database. Use ADO.NET to connect with the database, and use stored procedures, functions, and triggers for each table object in the database to realize the basic operation functions of the table.

Initial, input, output, management modules 105, 110: are the presentation layer of the system. It mainly calls the functions of the business interface layer. Including system interface design, input and output formats of various business processes, and generating real-time views according to the system. It also includes the management of the system background, including user management, permissions, upgrades, etc.

Vehicle technical appraisal module 106 to be evaluated: Calculate the technical appraisal coefficient of the vehicle for use in subsequent evaluations.

Same model new car comparison module 107: When there is the latest model of the same model as the vehicle to be evaluated, compare several key configurations of the old and new cars, and change the replacement cost for use by the evaluation calculation module 108.

Appraisal and calculation module 108: The four basic methods of appraisal and appraisal of old motor vehicles are calculated according to the existing data and conditions, respectively, the replacement cost method, the income present value method, the current market price method and the liquidation price method. The processes of the four methods are different, and the calculation methods are also different. The replacement cost method is the core. Other methods are derived from it. The calculation of the replacement cost _Pc of the replacement cost method is divided into two cases: one case is when there is the latest model of the same model as the vehicle to be evaluated, the replacement cost is based on the price of the new car (including purchase tax), and at the same time For the horizontal comparison factors of the key configurations of new cars of the same model, call the new car comparison module 107 of the same model for synthesis and then use it as the replacement cost; in another case, when there is no latest model of the same model as the vehicle to be evaluated, the replacement cost will be determined by the user enter. Then call the technical appraisal coefficient C of the technical appraisal module of the vehicle to be evaluated, and calculate the vehicle appraisal price P according to formula 1. The other three valuation methods are derived from several modules in the main flow of the replacement cost method. $P=\mathrm{PC}\×C\×+(1-\frac{\mathrm{Tu}}{\mathrm{Tt}})+\mathrm{Pa}$ Equation (1), in Equation (1): T _u is the used time of the vehicle, T _t is the normal service life of the vehicle, and P _a is the added value of insurance and decoration of the vehicle.

Appraisal evaluation form module 111: realize the printing function of the system form. Because it is a Web-based B/S system, online printing is not as convenient as a C/S system. This module implements online printing components.

Transaction price neural network calculation module 109: After evaluating and calculating the vehicle evaluation price based on objective conditions, it should also provide reference transaction prices for car owners to promote real transactions of used cars, so predicting transaction prices is very important. BP artificial neural network is a very effective prediction method, but the gradient descent method it uses often cannot guarantee global convergence and falls into local minimum. The genetic algorithm has a high degree of parallelism, but also ensures a good convergence speed. Therefore, the application of genetic algorithm and BP artificial neural network in transaction forecasting can get better forecasting effect. According to the data set (assessment price, transaction environment, etc.) in the historical transaction records of old motor vehicles in the system as input and transaction price as output, each weight value is obtained through neural network training using genetic algorithm. In this way, after the vehicle evaluation price of the latest data is input, a more reasonable transaction price can be obtained.

The main methods of system development at home and abroad are: life cycle method, prototype method and growth method. Because the old motor vehicle appraisal and valuation system is a small system, and users can provide feedback continuously during use, program designers can quickly modify the system according to users' suggestions. Therefore, the utility model selects the prototype method as the development method of the old motor vehicle appraisal and evaluation system. The basic idea of the prototyping method is not to overemphasize the stages of system development, but to focus more on quickly shaping a model close to the user, called a prototype, first run the prototype, and then continuously evaluate and improve the prototype to make it Gradually improve. Its development process is a process of repeated analysis, design, programming, operation and evaluation and continuous evolution. The main characteristics of the prototyping method are: first, the principle is simple, vivid, intuitive, and easy to be accepted by people; second, the use of simulation means is conducive to the participation of users and shortens the distance between users and analysis and design personnel; third, in the whole During the development process, it is convenient to feedback information in time, expose problems in time, solve problems in time, shorten the development cycle, and ensure the correctness of system implementation. The main workflow of the prototyping method can be referred to Figure 3.

Please refer to FIG. 4 , which is a structural diagram of the B/S system of the appraisal and evaluation system of the present invention. As shown in Figure 4, the utility model device adopts browser/server (B/S) structure. The B/S structure is the foundation and core of the development and realization of this device system. It uses the existing Internet/Web technology to put the application program on the Web server, and the customer accesses the Web server through the browser on the terminal, thus realizing the application program call. The B/S structure in Figure 1 consists of three layers: browser, Web server, database server/application server. The key issue in realizing the B/S structure is what kind of technology the Web server adopts to undertake the information and data interaction between the browser and the database, so as to realize the dynamic release of data. The two mainstreams of the B/S system implementation platform are Java and .NET, and the implementation environments used here are .NET and C#. At the same time, fully consider the intelligence and scalability of the software, use the historical transaction records of old motor vehicles in the SQL Server database to establish a BP neural network based on genetic algorithms, analyze the transaction experience of relevant models in the database and apply it to the estimated transaction guidance price Forecasting.

Please refer to FIG. 5 , which is a frame structure diagram of the appraisal and evaluation device of the present utility model. As shown in Figure 5, the motor vehicle appraisal and valuation system can be divided into: input vehicle basic information, vehicle price information, comprehensive performance testing parameters and technical status appraisal results; calculate appraisal value according to the replacement cost method; output appraisal appraisal results and save appraisal results Parameters and Results: Appraisal Valuation History Inquiry Four modules.

In the design of the old motor vehicle identification and evaluation system, considering the needs of the calculation parameters and calculation methods of the identification and evaluation, two databases are established to support the identification and evaluation system, namely: the new vehicle performance parameter database 112 and the old motor vehicle evaluation history record database. Among them, the new vehicle performance parameter database 112 provides data support for calculating the basic newness rate of old motor vehicles: the old motor vehicle valuation history record database is used to preserve the results of appraisal and valuation and the valuation parameters of vehicles and other information, and provides information for the historical evaluation of old motor vehicles Record query provides support. This article uses SQLServer2000 to build a database, and uses structured query language SQL to realize data storage and query functions.

The data input of the old motor vehicle appraisal and valuation system adopts keyboard input, and the input content and format should meet the requirements of computer program processing. When an input error occurs, the system will pop up a prompt dialog box to ask the user to correct the wrong input. The appraisal and valuation results of old motor vehicles are output in the controls of the Visual Studio.net form, and the valuation parameters and results are stored in the historical record database, and displayed in the form of tables when inquired.

The old motor vehicle appraisal and evaluation system mainly manages the following data: user data (appraiser, car owner), vehicle data (new car, car to be appraised), technical evaluation related data, evaluation result data, and historical transaction data. After analysis, following the principles of security, scalability, data exchange reliability, and effective concurrency control, the vehicle owner information table, vehicle parameter table, evaluation information table, evaluation result table, transaction result table, and technical appraisal are mainly established. Project table, vehicle repair table, user management table and other tables.

The utility model old motor vehicle identification evaluation system adopts the database connection pool technology. In the use of .NET language for database-related Web application development, ADO.NET is generally used to interact with the database. ADO.NET is a database API that supports the .NET framework standard, which makes the connection between C#.NET programs and database servers more convenient. In the traditional mode, when developing a database-based Web program, establish a database connection in the main program (such as: ASP.NET or COM+); perform SQL operations, store or retrieve data; disconnect the database connection. In this mode, the system establishes a new database connection for each request. For a simple database application, when you need to access the database, create a new connection, and close it after use. Doing so will not obviously increase the overhead of the system and reduce the performance of the system. However, in the web program, due to the large number of server visits, frequent connections are established and closed, which increases the overhead of the system and reduces the performance of the system. Therefore, the traditional database connection mode becomes the bottleneck of system performance.

The database connection pool technology used in this system allows ASP.NET or COM+ applications to dynamically reuse established connections. It does not need to establish new connections every time it accesses the database, and only obtains connections when necessary, thereby avoiding The unreasonable allocation of system resources ensures the performance of the system.

The following describes the principle of the connection pool: the connection pool is the "buffer storage pool" of many connection objects, and it is also a collection of connection objects. A connection mechanism is provided inside the connection pool, which can control the number of connection objects inside the connection pool, and provide an interface for applications to obtain and release connections. A complete connection pool can also control the lifetime of the connection object.

The key technologies of the connection pool include: first, concurrency control. When multiple threads (or processes) access shared resources concurrently, it is necessary to consider the synchronization between threads to ensure that logic errors do not occur. In this scenario, the connection pool is a shared resource. Therefore, operations that change connection pool attributes need to be synchronized. Second, the design pattern of multiplexing connections. Use free pool and use pool techniques. The free pool stores connections that have not yet been allocated for use. Once a connection is allocated, it will be put into the use pool and the reference count will be increased, so that the connection can be used efficiently. Because once all the connections in the free pool are allocated, the connection method with the smallest reference count can be reused, and an already-in-use connection can be selected from the pool for reuse. Third, connection pool operation performance analysis. Using the same .NET database application program, the database access mode of the program has two schemes: no connection pool scheme and connection pool scheme, and the executed operations include establishment of connection and execution of query, which constitute four combinations. Choose the general PC Windows platform, use this system to simulate 30 customers for each combination, each customer visits the database once every 3s, records the data of 100 visits, and takes the average value. The results can be seen from Table 1, whether the connection pool scheme is used or not takes the same time to execute the query. This shows that in database access, whether to use the connection pool can not significantly reduce the time required to execute the query.

From the time of establishing a database connection, there is a significant difference before and after using the connection pool. This shows that in the .NET database program, in the case of a large number of concurrent accesses, it is necessary to choose a connection pool solution. The basic functions of the database connection pool implemented in this study are suitable for large-scale Web applications. From the test results, the use of connection pool technology in Web applications can significantly reduce the overhead of database connections in Web applications and improve the overall performance of the system.

The realization of the vehicle condition technical appraisal evaluation will be described below. Principles of technical appraisal evaluation: Vehicle condition technical appraisal is a commonly used step in the actual evaluation process of used motor vehicles. Vehicle technical condition mainly includes vehicle appearance inspection, hood inspection, vehicle interior decoration inspection, vehicle function parts inspection, vehicle chassis inspection, road test, vehicle maintenance inspection, vehicle cleaning work and accessories inspection (i=1. .8) Inspection of a total of 106 detailed sub-items (j=1..n, j is the order of the sub-item in the major item). The final vehicle technical condition coefficient is used in the overall evaluation formula. The simple vehicle condition technical appraisal coefficient module mainly includes two steps: determine the score Vij of each sub-item and the weight Sij of each sub-item j in the i-th major item according to the scores of each inspection sub-item, and calculate the score of each major item Vi; then calculate the total coefficient C of vehicle condition technical appraisal according to the weight Bi of each major item.

$\left\{\begin{array}{c}\mathrm{Vi}=\frac{\underset{j}{\mathrm{\Σ}}\mathrm{Vij}\×\mathrm{Sij}}{\underset{j}{\mathrm{\Σ}}\mathrm{Sij}}\\ C=\frac{\underset{i}{\mathrm{\Σ}}\mathrm{Vi}\×\mathrm{Bi}}{\underset{i}{\mathrm{\Σ}}\mathrm{Bi}}\end{array}\right.$ Formula (2)

When a sub-item of the vehicle has not been evaluated and scored, the sub-item does not participate in the calculation of the score Vi of the major item it belongs to. Similarly, if all sub-items of a certain major item have not been evaluated and scored, this major item will not be involved in the calculation of the total appraisal coefficient C. If all the major technical appraisal items of the total coefficient C have not been evaluated and scored, a specific constant can be assigned to C.

Considering the condition of restoration, the technical appraisal coefficient is calculated as follows: When conducting technical appraisal evaluation, the evaluation scores of 106 detailed sub-items generate a total coefficient. However, in the actual situation, there may be a situation where a certain part of the car has been damaged but has been repaired. At this time, the score Vij of this small item is based on the intact level and the repair degree coefficient Rij is properly considered. So formula (2) becomes:

$\left\{\begin{array}{c}\mathrm{Vi}=\frac{\underset{j}{\mathrm{\Σ}}\mathrm{Vij}\×\mathrm{Rij}\×\mathrm{Sij}}{\underset{j}{\mathrm{\Σ}}\mathrm{Sij}}\\ C=\frac{\underset{i}{\mathrm{\Σ}}\mathrm{Vi}\×\mathrm{Bi}}{\underset{i}{\mathrm{\Σ}}\mathrm{Bi}}\end{array}\right.$ Formula (3)

Where R _ij =1 when there is no repair.

Another reality is that a part of the car has been damaged and has not been repaired. Due to the wide variety of auto parts, fast update, and difficult price evaluation, in this case, the score of this unrepaired item is regarded as a normal and intact item. These unrepaired items will be indicated in the vehicle appraisal and evaluation form, and the price required to repair these items should be subtracted from the vehicle evaluation price according to the actual situation.

In the utility model, reference can be made to Fig. 2 for the method for identification and evaluation of old motor vehicles. As shown in Fig. 2, the method for identification and evaluation of old motor vehicles comprises steps: the first, inputting identification and evaluation information; The information is analyzed and processed to obtain the identification and evaluation results; thirdly, the identification and evaluation results are output. Wherein, the input appraisal and evaluation information in the first step includes: vehicle condition appraisal and evaluation criteria, basic information of the vehicle to be evaluated, basic information of the new car, and added value information of the vehicle. The second step further includes sub-steps: first, calculate the technical appraisal coefficient of the vehicle according to the appraisal information; second, compare the vehicle to be evaluated with a new car of the same model, and change the replacement cost; third, calculate the replacement cost of the old motor vehicle according to Replacement cost method, income present value method, current market price method, and liquidation price method combined with the above-mentioned data and information to carry out appraisal and evaluation calculations; fourth, the transaction reference price is obtained according to the appraisal and evaluation calculation results. The manner of outputting the identification evaluation result in the third step is display output or print output.

The specific operation process in this embodiment is as follows: first, according to the old motor vehicle appraisal and valuation registration form filled in by the customer, combined with on-the-spot investigation to determine the authenticity of the materials, check the vehicle's recent comprehensive performance test result sheet, vehicle brand, model, Whether a series of original materials and procedures such as the registration date of the new car, the service life, the specified service life and the purpose of the vehicle are consistent with the real thing: Then the old motor vehicle appraisal and appraiser will appraise the technical condition of the old motor vehicle, and separately evaluate the old motor vehicle Carry out static and dynamic inspections on the vehicle body, engine, chassis and electrical systems, give the technical status scores of the above four major assemblies according to the five-point system, and initially determine the newness rate: finally, comprehensively consider the working nature, working conditions, and maintenance of the vehicle. Factors such as maintenance status, vehicle brand value, and whether the vehicle has any accident experience are used to adjust the newness rate with corresponding coefficients to obtain a comprehensive newness rate. According to the replacement cost and comprehensive newness rate of the vehicle, the improved replacement cost method is used to calculate the estimated net value of the old motor vehicle, and then the estimated value of the vehicle is corrected according to the added value of the vehicle, and finally the estimated value of the motor vehicle is calculated and output , save the identification and evaluation results and evaluation parameters; and provide different limited conditions for the second-hand car evaluation history query, and provide data information support for the application of the market comparison method in the identification and evaluation of used motor vehicles in the future.

The identification and evaluation system for old motor vehicles of the utility model involves the following relevant information during the identification and evaluation of old motor vehicles.

Part 1: In the vehicle condition appraisal and evaluation standard information, the testing items include:

Vehicle Appearance Inspection Vehicle Chassis Inspection

Visual inspection (body, underbody, body

1 engine cover (surface paint) / inner sound insulation pad 55

Bottom part)

2 Front bumper (surface paint) 56 Frame front beam

Exhaust system (intake and exhaust pipes, three-way catalytic

3 Grille shield (car logo) 57

                                                                        , 

                                                       

4 Other light housings for headlights and taillights 58

set)

  Left front fender (paint surface, decoration protection

5 59 Rear caliper. Half shaft. Brake shoe (status)

pieces)

6 Left front door (painted surface, decorative protection parts) 60 Brake hydraulic system (pipeline, cover)

7 Left rear door (painted surface, decorative protection parts) 61 Carbon tank and control valve, pipeline

  Left rear fender (paint surface, decoration protection

8 62 Four shock absorbers/pillars (function, hourglass)

pieces)

Four shock absorber springs and supports (installation. Bushing.

9 trunk lid (painted surface, trim protection) 63

Status)

10 rear bumper (protective cover, surface paint) 64 stabilizer bar/balance bar

  Right rear fender (painted surface, decoration protection     Control triangle arm and pull rod, etc. (installation. lining

11 65

piece) set.condition)

12 Right rear door (paint surface, decorative protection parts) 66 Engine underside

13 Right front door (painted surface, trim protection) 67 Lower side of gearbox

  Right front fender (paint surface, decoration protection   Drive system (drive half shaft, dust cover ball

14 68

pieces) cage binding part)

Roof and top edge, A B C three pillars, two rear view

15 69 Rear axle and rear suspension

Mirrors (painted surfaces, decorative protections)

  The windshield of the whole car (scratches, scratches, cracks

16 70 ABS sensor and circuit

marks, dents)

Four tires and tire covers (dents, scratches) Automatic transmission hydraulic system (leakage, lubrication

17 71

and air pressure (specified value) Lubricating oil)

    Inspection of the lower part of the engine hood                                                                                   72 Steering gear coupling device (connecting rod)

Visual observation (missing/defective parts, leakage, commercial steering rack and pinion device (hydraulic oil inspection)

18 73

Mark, sign nameplate) Check for leaks, install)

  Proofread vehicle VIN, check the engine\automatic

19 74 Parking brake cable (condition, degree of wear)

Gearbox sensor diagnostic test

20 Circuit system (various wiring harnesses) Road test

                                                                       

21 Battery/generator 75

Hot car)

from 0 km/h to 100 km/h

22 Starter motor 76

Acceleration and passing performance

  Engine cooling system/water pump (fluid level, cover,   Use computer to control engine, automatic transmission

23 77

Fluid status) Box dynamic diagnostic testing

Transmission and automatic transmission shift quality

24 Radiator and cooling fan 78

quantity

25 Oil pump/gasoline pump 79 Clutch hydraulic booster system

  Power steering system (fluid level, steering pump, oil

26 80 Manual transmission handling

road pipe)

Brake system (brake fluid level, brake assist

27 81 Clutch disengagement degree/pedal stroke

pump, brake fluid lines)

Instrument indication system (all instrument indication

28 Ignition system (spark plug, ignition coil) 82

lamp)

                                             

29 Oil-air circulation system (crankcase ventilation) 83

                                                                                                                                              , 

Petrol oil circuit system (oil circuit, pipeline and connection Brake system, anti-lock brake system driving

30 84

Leakage check) Drivability (ABS)

Turning and straight driving are easy and noiseless,

31 Vacuum system (status) 85

Steering wheel centered horizontally

Passive safety system (dual airbags, all

32 Air conditioner compressor (leakage, pipeline) 86

seat belt)

  Vehicle condenser, evaporator system (leakage,   body four-door (noise/vibration/body line

33 87

pipeline) bundle)

Engine belt/timing chain (tensioner grinding) Disc bottom/suspension system/tyres (noise/vibration

34 88

loss) / body wiring harness)

      Inspection of Vehicle Interior                                                                                                    

Dashboard (trim, controls, clock Windshield wiper/washing operation (wiper blades

35 90

Reset) Hang Mark)

Left front seat and door inner side (seat cushion, control tachometer/speedometer/odometer/fuel gauge/

36 91

parts, interior trim, headrest) Water temperature gauge

Right front seat and door inner side (seat cushion, control

37 92 Adjustable steering wheel

parts, interior trim parts, headrests)

Rear left seat and door inner side (seat cushion, controls Audio system (radio/cassette

38 93

parts, interior decoration parts) /CD/VCD/DVD/speaker/antenna)

The right rear seat and the inner side of the door (seat cushion, control) heating and cooling air-conditioning temperature (blower/control system

39 94

Parts, interior decoration parts) System/air supply distribution system)

40 All carpets and floor mats inside the compartment (condition) 95 Car horn (function/sound)

Interior roof (sun visor, vanity mirror, luggage storage

41 Vehicle Maintenance Inspection

shelf)

Check Transmission Lubricant/Engine Oil

42 Interior trim panels and sheet metal parts of the trunk 96 (replace if necessary)/90# gasoline (10 kg

Liter) and above

Check Oil Filter/Gasoline Filter/

                                                                                                                             

(replace if necessary)

Check or add oil level (antifreeze/system

43 key/remote key 98

                                                                                                                                                     

44 Radio Security Code (Function) 99 Lubricate Pivot Points (Cover/Door Hinges, Handmade

move)

                                                                                      

45 Driver Information Center/Compass 100

National Environmental Protection Standard)

46 Interior lighting (instrument panel light) Vehicle cleaning and accessory inspection

External lighting (headlights, direction lights,

47 101 Clean interior surfaces and ashtrays

Fog lights, brake lights and high brake, etc.)

Door handle/door lock (locking device/child protection

48 102 Carpet and trunk cleaning

The device is functioning normally)

49 Four seats (the electric seat functions normally)                                                                                             103

50 Fuel tank lock/trunk lock/front lid lock 104 Clean engine compartment

  Four window glass (manipulation switch. Electric control button

51 105 Windshield and appearance

normal)

Car alarm/car phone (remote control device Check the spare tire on-board tools/maintenance manual

52 106

normal function) all valid

53 Vehicle power supply/cigarette lighter

54 Automatic sunroof (function condition is normal)

When appraising and evaluating the vehicle condition, the above 106 items are judged and scored, and each item is divided into five grades of excellent, medium, poor, and waste, corresponding to the 5-point system, of which excellent (5 points) standard, good (5 points) Standard, medium (5 points) standard, poor (5 points) standard, waste (5 points) standard:

Basic methods and standards for vehicle identification and accident vehicle identification:

Check parts Purpose of inspection Check key points and skills Accident vehicle identification hood Check if the hood has ever been sheet metal or replaced 1. Visually check whether the edge line of the hood is straight and integrated. 2. Touch the inside of the edge of the hood with your fingers to see if it is straight and smooth, with the same height. ※The edge of the hood should be naturally straight, and the inside of the edge should be smooth and not rough

The connection between the fender and the water tank frame Check whether the front fender and water tank frame have been repaired or replaced 1. Whether there are re-welding marks on the solder joints at the joints between the inner edge of the front fender and the water tank bracket. 2. Whether the joint is smooth. True circle and slightly concave, if the solder joint is protruding, if the solder joint is re-soldered Has the tank frame ever been repaired or replaced? engine compartment partition Check the integrity of the engine room partition Whether the upper edge of the partition is straight or not ※Some cars have an engine partition in front of the fire wall, and the upper edge should be straight. If the partition is injured due to an accident, then this car must be miserable Has the engine compartment bulkhead ever been sheet metal or replaced? chassis Check the girder for traces of welding 1. Gearbox oil pan 2. Girder ※The entire chassis should be roughly the same degree of dirt, there should not be any part that is particularly dry, and the girder should also be straight Is the girder deformed or straightened by welding? car door Check whether the door is replaced with door skin or door assembly 1. Check whether the original factory seals on the inner sides of the four doors are complete and straight 2. Check whether the hinges of the door frames are intact and unremoved

carriage cover Check whether the carriage cover has been sheet metal or replaced 1. Whether the edge of the trunk lid is straight or not. 2. The inner side of the edge of the trunk lid should be straight and smooth. ※The focus of the inspection of the trunk lid is roughly the same as that of the engine cover. Observe Interior of luggage compartment and upper edge of rear fender Check whether the rear luggage compartment is damaged and whether the rear fender has been sheet metal or replaced 1. Whether there are traces of re-welding at the joint of the inner edge of the fender and the body. 2. Whether the line at the junction of the license plate frame on the rear side of the luggage compartment and the floor of the luggage compartment is smooth, and whether there are traces of welding. 3. Leaf The connection between the plate and the carriage and the car body should be flat, and the solder joints on it should be slightly round and slightly concave. If the solder joints are protruding, if there are traces of welding Has the rear fender been switched? Luggage compartment floor and spare wheel frame Check whether the carriage has been damaged and has been hit 1. Whether the floor of the luggage compartment is flat, and whether there are any traces of welding. 2. Whether the lines of the interior seams of the luggage compartment are smooth. 3. Whether the floor of the luggage compartment is smooth, and there should be no traces of welding. The seams should be straight and natural. If the bottom plate is damaged, the rear beam must be damaged Has the luggage compartment floor been welded and is the spare tire frame intact? A, B, C pillars Check A, B, C pillars for damage 1. Whether the A, B, C pillars and the line extending from the roof to the door sill are straight and natural arcs 2. The solder joints at the junction of A, B, C pillars and the car body 4. Whether there are different color differences in the side paint ※When checking, you can pull down the sound insulation strip to check whether it is straight and in a natural arc. The solder joints at the junction of A, B, C pillars and the car body should be slightly true circle and slightly concave Have A, B, C been repaired by sheet metal or welding?

door side Check whether the side of the car body has been hit 1. Whether the side and edge of the door are flat and straight 2. Whether the original sealant is complete ※The side and edge of the door should be flat and straight, and the original seal should be complete Full interior and exterior Check whether the car is soaked in water 1. Open the hood to check if there is any dirt left on the water tank, air-conditioning fins, and the front panel of the water tank (viewed from below)? 2. Check whether there is any dirt left on the small parts beside the hood, charging motor, starting motor, wire socket, seams of left and right wheel turtles? 3. Check the front and rear seats (upside down) to see if there is any sludge or dirt left on the springs and inner flannel cloth? 4. Check whether there is any sludge left in the dead corners of the hidden seams of the rear wheel tortoises on both sides of the rear luggage compartment seat (spare tire seat)? 5. Is there any sludge left on the structure, wires and socket connectors in the dashboard seat? 6. If it is a car soaked in water, the plastic trim of the B-pillar of the vehicle can display the height of the soaking water (because there are too many dead corners in the car pillar, it is not easy to clean) 7. Pull the front and rear windshield rubbers (from the inside of the car) If there is sludge, the car will be completely soaked, if the water level exceeds the hood, it will be considered as a full soaked car (overwhelmed) Soaked car is an accident car

There are many forms of accident vehicles, and there is no authoritative and unified definition standard at present. The general definition of accident vehicles is listed in the table above. Its evaluation price is much lower than that of normal vehicles, so special attention should be paid when testing. According to the severity of the accident, the extent of the impacted part and the impact on the safety of the vehicle in the future, the accident is divided into 5 levels, the first-level accident, the second-level accident, the third-level accident, the fourth-level accident, and the fifth-level accident:

The second part is the basic information of the vehicle to be evaluated

This part mainly refers to the basic parameter information of vehicle use and vehicle transaction management information. This information mainly includes: vehicle brand; vehicle model; vehicle color; vehicle displacement; The owner's name; contact number and address; name of the contact person; contact number and address.

Part III Basic Information of New Cars

This part is mainly the basic parameter information database input of the new car. In the calculation of the replacement cost method, the current new car price of the vehicle will be used as the main reference value of the replacement cost. However, due to the rapid development of new cars, many models of old motor vehicles are no longer produced or have been changed. In order to obtain a more reasonable replacement cost data, the current main configuration and other information that affects the price of the corresponding new car are compared and analyzed, and the calculation is based on the current price of comparable new cars, adding configuration and reducing price, and reducing configuration and adding price Way. The prerequisite for using the price of a new car as the reference basis for the replacement cost price must be that the displacement and transmission mode of the evaluated vehicle are consistent with those of the new car. This information mainly includes: vehicle brand; vehicle model; vehicle displacement; gearbox mode: manual, automatic, manual and main configuration table.

The fourth part is the added value information of the vehicle. These information include: insurance, the accounting method of the insurance part is: Surrender amount = policy amount/12×(remaining month-2 months); road maintenance fee, because the road maintenance fee part is generally not refundable, therefore, in the second-hand car In the evaluation, it can be converted according to the amount on the road maintenance fee document, or it can not be included. However, it should be noted whether the road maintenance fee is paid on time. If it is not paid in time, relevant fines may be involved. The amount of the fine can be entered in a negative value after checking with the relevant department.

By applying computer technology and information technology to appraisal and appraisal work, the utility model can not only process relevant information conveniently and quickly, reduce the labor intensity of appraisal and appraisal personnel, improve work efficiency, but also can carry out preliminary data analysis on basic information. Analysis, providing data basis for judgment, decision-making and other work. In addition, the use of the old motor vehicle appraisal and evaluation system can overcome the current old motor vehicle appraisal and appraisal that relies heavily on the personal level and experience of the appraisal and appraisal personnel, reduce the errors that are prone to occur in the process of manual information processing, and can also overcome as much as possible Human subjective factors lead to unfair behavior in appraisal and appraisal of old motor vehicles, thereby improving the accuracy, objectivity and fairness of appraisal and appraisal results.

The above content is a further detailed description of the utility model in combination with specific preferred embodiments, and it cannot be assumed that the specific implementation of the utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the utility model belongs, on the premise of not departing from the concept of the utility model, some deductions or substitutions can be made, which should be regarded as belonging to the protection scope of the utility model.

Claims (8)

1. an old automobile is identified apparatus for evaluating, it is characterized in that described device comprises:

Be used to import the information input link (101) of identifying appreciation information;

Be used for controller (102) that described evaluation appreciation information is analyzed, handled;

Be used to show the information output link (103) of identifying assessment result;

Wherein said controller (102) further comprises:

Be used for the database of storing data information, the database interface module (104) that is connected with described database;

Be used to call input information, and can carry out initialization and control device be carried out initial, the input interface administration module (105) of back-stage management described control device;

Be used to calculate the vehicle technology evaluation module (106) to be assessed that assessment vehicle technology to be identified is identified coefficient;

Be used for assessment vehicle to be identified and its same vehicle new car comparison module (107) that compares with the vehicle new car;

Be used for described input information is identified assessment and identified coefficient and the described evaluates calculation module of evaluating with vehicle new car comparative parameter (108) in conjunction with described assessment vehicle technology to be identified;

Be used for providing the transaction value neural network computing module (109) of transaction value reference and the output interface administration module (110) that is connected with described output unit for the car owner according to described evaluates calculation result.

2. identify apparatus for evaluating according to the described old automobile of claim 1, it is characterized in that: described controller (102) further comprises: be used for described evaluation apparatus for evaluating is identified that assessment data prints the evaluation evaluation form list module (111) of processing.

3. identify apparatus for evaluating according to the described old automobile of claim 1, it is characterized in that: described evaluation appreciation information comprises: vehicle condition is identified evaluation criteria, vehicle essential information to be assessed, new car essential information and vehicle surcharge information.

4. identify apparatus for evaluating according to the described old automobile of claim 1, it is characterized in that: described database comprises: new car performance parameter database (112) and old automobile appraisal historical record database (113).

5. identify apparatus for evaluating according to the described old automobile of claim 1, it is characterized in that: described initial, input interface administration module (105) is the presentation layer of described system, comprises the input format of system interface design, each operation flow, generates the management work on real-time view and described system backstage according to system.

6. identify apparatus for evaluating according to the described old automobile of claim 1, it is characterized in that: described input link (101) is a keyboard.

7. identify apparatus for evaluating according to the described old automobile of claim 1, it is characterized in that: described output link (103) is a display screen.

8. identify apparatus for evaluating according to the described old automobile of claim 1, it is characterized in that: the printer of described output link (103) for linking to each other with described evaluation evaluation form list module (111).

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