CN107909416A - The method and vehicle price evaluation device of vehicle price evaluation - Google Patents
The method and vehicle price evaluation device of vehicle price evaluation Download PDFInfo
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- CN107909416A CN107909416A CN201711498044.1A CN201711498044A CN107909416A CN 107909416 A CN107909416 A CN 107909416A CN 201711498044 A CN201711498044 A CN 201711498044A CN 107909416 A CN107909416 A CN 107909416A
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Abstract
The embodiment of the present application discloses the method and vehicle price evaluation device of a kind of vehicle price evaluation, and for calculating the price of target vehicle according to the vehicle condition data of target vehicle, which is not tampered with, and can more accurately assess the value of target vehicle.The embodiment of the present application method includes：The vehicle condition data of target vehicle are obtained from target device；Judge whether the vehicle condition data are tampered；If it is not, the loss factor of the target vehicle is then calculated according to the vehicle condition data；The price of the target vehicle is calculated according to the loss factor.
Description
Technical field
This application involves block chain technical field, more particularly to the method for vehicle price evaluation and vehicle price evaluation dress
Put.
Background technology
With the development of science and technology, the raising of living standards of the people, car replacement replacement speed is very fast so that used car
Transaction is also increasingly burning hot.Therefore, how rational assessment price is carried out for used car to inscribe as a heat.
At present, used car assessment price is mainly used car assessment system by being obtained with the price of vehicle according to time limit depreciation
Further according to appearance of personal experience and vehicle etc. used car is assessed to obtain the value of used car to a benchmark price.
But the assessment of used car at present be with vehicle purchase time limit depreciation after further according to personal experience and automobile
Appearance carries out assessment price.Since the evaluation process Main Basiss purchase time limit at present in used car is assessed, such as
One car bought 5 years and do not opened lower than 1 year car fare lattice of rent-a-car company is clearly unreasonable.Therefore, it is second-hand at present
Data referenced by the assessment of car are very imperfect, and refer to data be all to be provided by car owner, among these artificially to data into
It is also what can not be prevented that row, which is distorted,.Therefore, result in the assessment price to used car differ with the real value of the used car compared with
Greatly.
The content of the invention
The embodiment of the present application provides the method and vehicle price evaluation device of a kind of vehicle price evaluation, for basis
The vehicle condition data of target vehicle calculate the price of target vehicle, which is not tampered with, and can more accurately assess mesh
Mark the value of vehicle.
In a first aspect, the embodiment of the present application provides a kind of method of vehicle price evaluation, including：
The vehicle condition data of target vehicle are obtained from target device；
Judge whether the vehicle condition data are tampered；
If it is not, the loss factor of the target vehicle is calculated according to the vehicle condition data；
The price of the target vehicle is calculated according to the loss factor.
In a kind of possible implementation, the target device is the node device of block chain；Described from target device
Before the vehicle condition data for obtaining target vehicle, the method further includes：
Request message is sent to the target device, the request message includes goal condition information, so that the target
Equipment judges whether the goal condition information meets the intelligent treaty conditions being registered in by the target device in block chain；
The vehicle condition data that target vehicle is obtained from target device, specifically include：
After the target device judges that the goal condition information meets the intelligent treaty conditions, the target is received
The configured information that equipment is sent；
The vehicle condition data of the target vehicle are obtained from the target device according to the configured information.
It is described to judge whether the vehicle condition data are tampered in alternatively possible implementation, specifically include：
The corresponding the First Eigenvalue of vehicle condition data of the target vehicle, the fisrt feature are obtained from the target device
It is worth the corresponding mobile unit of the target vehicle to obtain by vehicle condition data progress computing described in unidirectional irreversible function pair
Characteristic value；
Computing is carried out according to the vehicle condition data that the unidirectional irreversible function pair is got, obtains Second Eigenvalue；
Judge whether the Second Eigenvalue is consistent with the First Eigenvalue；
It is if consistent, it is determined that the vehicle condition data are not tampered with.
In alternatively possible implementation, the loss system that the target vehicle is calculated according to the vehicle condition data
Number, specifically includes：
The performance number of the target vehicle is calculated according to the vehicle condition data, and according to the performance number meter of the target vehicle
The loss factor of the target vehicle is calculated, wherein, the performance number and the loss factor positive correlation.
In alternatively possible implementation, it is described according to the loss factor calculate the target vehicle price it
Afterwards, the method further includes：
The price of the target vehicle is registered in block chain.
In alternatively possible implementation, the price by the target vehicle is registered in block chain, specific bag
Include：
The price of the target vehicle is encrypted, obtains the encryption pricing information of the target vehicle；
The encryption pricing information is registered in block chain.
Second aspect, the embodiment of the present application provide a kind of vehicle price evaluation device, including：
Acquiring unit, for obtaining the vehicle condition data of target vehicle from target device；
Judging unit, for judging whether the vehicle condition data are tampered；
First computing unit, for calculating the loss factor of the target vehicle according to the vehicle condition data；
Second computing unit, for calculating the price of the target vehicle according to the loss factor.
In a kind of possible implementation, the vehicle price evaluation device further includes：
Transmitting element, for sending request message to the target device, the request message includes goal condition information,
So that the target device judges whether the goal condition information meets the intelligence being registered in by the target device in block chain
Can treaty conditions；
The acquiring unit is specifically used for receiving the configured information that the target device is sent；According to the configured information from
The target device obtains the vehicle condition data of the target vehicle.
In alternatively possible implementation, the judging unit is specifically used for：
The corresponding the First Eigenvalue of vehicle condition data of the target vehicle, the fisrt feature are obtained from the target device
It is worth the corresponding mobile unit of the target vehicle to obtain by vehicle condition data progress computing described in unidirectional irreversible function pair
Characteristic value；Computing is carried out according to the vehicle condition data that the unidirectional irreversible function pair is got, obtains Second Eigenvalue；Sentence
Whether the disconnected Second Eigenvalue and the First Eigenvalue are consistent；It is if consistent, it is determined that the vehicle condition data are not tampered with.
In alternatively possible implementation, first computing unit is specifically used for：
The performance number of the target vehicle is calculated according to the vehicle condition data, and according to the performance number meter of the target vehicle
The loss factor of the target vehicle is calculated, wherein, the performance number and the loss factor positive correlation.
In alternatively possible implementation, the vehicle price evaluation device further includes：
Registration unit, for the price of the target vehicle to be registered in block chain.
In alternatively possible implementation, the registration unit is specifically used for：
The price of the target vehicle is encrypted, obtains the encryption pricing information of the target vehicle；Described it will add
Close pricing information is registered in block chain.
The third aspect, the embodiment of the present application provide a kind of data analytics server, including：
Processor, memory, input-output equipment and bus；
The processor, memory, input-output equipment are connected with the bus respectively, and meter is stored with the memory
Calculation machine instructs；
The processor is used for realization such as any reality of first aspect in the computer instruction in performing the memory
Existing mode.
Fourth aspect, the embodiment of the present application provide a kind of computer program product for including instruction, it is characterised in that when it
When running on computers so that the computer performs the implementation as described in any in first aspect.
5th aspect, the embodiment of the present application provide a kind of computer-readable recording medium, it is characterised in that including instructing,
When described instruction is run on computers so that computer performs the implementation as any one of first aspect.
As can be seen from the above technical solutions, the embodiment of the present application has the following advantages：
Understood via above technical scheme, the vehicle condition data of target vehicle are obtained from target device, judge the vehicle condition data
Whether it is tampered, if the vehicle condition data are not tampered with, then the loss factor of the target vehicle is calculated according to the vehicle condition data, is connect
The price that the target vehicle is calculated according to the loss factor.Therefore, by the vehicle condition data for the target vehicle for determining to get
After being not tampered with, the price of the target vehicle is then calculated by the vehicle data, being capable of more accurate evaluation target carriage
Value so as to target vehicle assessment price it is more accurate.
Brief description of the drawings
Fig. 1 is the system framework figure of the method for vehicle price evaluation in the embodiment of the present application；
Fig. 2 is one embodiment schematic diagram of the method for vehicle price evaluation in the embodiment of the present application；
Fig. 3 is one embodiment schematic diagram of data processing method in the embodiment of the present application；
Fig. 4 is another embodiment schematic diagram of the method for vehicle price evaluation in the embodiment of the present application；
Fig. 5 is a structure diagram of vehicle price evaluation device in the embodiment of the present application；
Fig. 6 is a structure diagram of mobile unit in the embodiment of the present application；
Fig. 7 is another structure diagram of vehicle price evaluation device in the embodiment of the present application；
Fig. 8 is another structure diagram of mobile unit in the embodiment of the present application.
Embodiment
The embodiment of the present application provides the method and vehicle price evaluation device of a kind of vehicle price evaluation, for basis
The vehicle condition data of target vehicle calculate the price of target vehicle, which is not tampered with, and can more accurately assess mesh
Mark the value of vehicle.
Referring to Fig. 1, during vehicle price evaluation, it is necessary to user, mobile unit, block chain node server with
And the participation of vehicle price evaluation device., wherein it is desired to explanation, can also there is the node device of other block chains, vehicle
Price evaluation device can obtain vehicle condition data, such as other terminals with block chain link, tool from the node device of block chain
Body does not limit herein.Wherein, vehicle price evaluation device is used for the section from the node server on block chain or block chain
Point device obtains the operation such as vehicle condition data and processing analysis vehicle condition data.Mobile unit is the mobile unit of target vehicle, is used
The vehicle condition data being collected into the acquisition to vehicle condition data and are uploaded to the node server of block chain.Block chain is block
Combined in a manner of chain, block chain database is formed with block.Block chain is the transaction of all nodes sharings in system
Database, block chain are used for storing the vehicle condition data of vehicle, and each node server meeting synchronized update backup of block chain is complete
Data.In the embodiment of the present application, the vehicle condition data that mobile unit is got are stored into the node server of block chain.
Set it should be noted that mobile unit can be onboard diagnostic system (on board diagnostics, OBD)
It is standby, or on-vehicle information box (telematics box, T-BOX) equipment etc., does not limit specifically herein.
It should be noted that vehicle price evaluation device can be server, or terminal, does not do specifically not herein
Limit, in following embodiment, only illustrated so that the vehicle price evaluation device is data analytics server as an example.
Below from the angle of data analytics server, it is situated between to the method for vehicle price evaluation in the embodiment of the present application
Continue, referring to Fig. 2, one embodiment of the method for vehicle price evaluation includes in the embodiment of the present application：
201st, the vehicle condition data of target vehicle are obtained from target device.
Data analytics server obtains the vehicle condition data of target vehicle from target device, wherein, which can be
The node device on node server or block chain on block chain, does not limit specifically herein.Specifically, it is vehicle-mounted
After equipment gets the vehicle condition data of target vehicle, upload in the node server of block chain, then data analysis at this time takes
Business device can obtain the vehicle condition data of the target vehicle from block chain, or data analytics server can be from block chain
The vehicle condition data of the target vehicle, such as the mobile unit, or the node device of block chain, the node are obtained in node device
Equipment has logged in corresponding account number, which has the vehicle condition data of the target vehicle.It should be noted that the vehicle condition data can
With including mileage, maintenance record, maintenance record, driver drive recorder, can also include further types of vehicle condition data, tool
Body does not limit herein.
202nd, judge whether the vehicle condition data are tampered, if so, then performing step 205；If it is not, then perform step 203.
After data analytics server gets the vehicle condition data of target vehicle, which can judge the car
Whether condition data are tampered, if data analytics server determines that the vehicle condition data are tampered, then step 205 are performed, if data
Analysis server determines that the vehicle condition data are not tampered with, then performs step 203.Specifically, data analytics server can be from
Target device obtains the corresponding the First Eigenvalue of vehicle condition data, which is the corresponding mobile unit of the target vehicle
The characteristic value that computing obtains is carried out by unidirectionally irreversible function pair vehicle condition data, then the data analytics server can lead to
The vehicle condition data for crossing the target vehicle that the unidirectional irreversible function pair is got carry out computing, obtain Second Eigenvalue, then
The data analytics server is it may determine that whether Second Eigenvalue is consistent with the First Eigenvalue, if unanimously, then can be true
The fixed vehicle condition data are not tampered with, if inconsistent, then can determine that the vehicle condition data are tampered with.
It should be noted that this unidirectionally can not inverse function can be hash function or it is other kinds of it is unidirectional not
Reversible encryption function, does not limit specifically herein.
203rd, the loss factor of the target vehicle is calculated according to the vehicle condition data.
After data analytics server determines that the vehicle condition data are not tampered with, target carriage can be calculated according to the vehicle condition data
Loss factor.It should be noted that data analytics server can calculate the property of the target vehicle according to the vehicle condition data
It can be worth, the loss factor of the target vehicle is calculated then according to the performance number, wherein, the performance number and the loss factor positive
Close.The loss factor of the target vehicle can also be calculated by other means, do not limited herein specifically.
204th, the car fare of the target vehicle is calculated according to the loss factor.
Data analytics server calculates the car fare of the target vehicle according to the loss factor being calculated.Can be specifically
The purchasing price that data analytics server is multiplied by the target vehicle according to the loss factor being calculated obtains the target vehicle
Value, the value of the target vehicle can also be calculated by other means, do not limit herein specifically.
205th, other operations are performed.
Determine that the vehicle condition data are tampered after data analytics server is by judging the vehicle condition data, then at this time should
Data analytics server can perform other operations, for example, can be data analytics server rejudge the vehicle condition data whether by
Distort either data analytics server and reacquire the operation such as vehicle condition data of the target vehicle, do not limit herein specifically.
In the embodiment of the present application, data analytics server obtains the vehicle condition data of target vehicle, data from target device
Analysis server judges whether the vehicle condition data are tampered, if the vehicle condition data are not tampered with, then data analytics server root
The loss factor of the target vehicle is calculated according to the vehicle condition data, then data analytics server calculates the mesh according to the loss factor
Mark the price of vehicle.Therefore, the vehicle condition data for the target vehicle for determining to get by data analytics server are not tampered with it
Afterwards, then data analytics server calculates the price of the target vehicle by the vehicle data, being capable of more accurate evaluation mesh
Mark the value of vehicle so that the assessment price to target vehicle is more accurate.
The method of vehicle price evaluation in the embodiment of the present application is retouched from the angle of data analytics server above
State, data processing method in the embodiment of the present application is described from the angle of mobile unit below, referring to Fig. 3, the application
Data processing method one embodiment includes in embodiment：
301st, mobile unit obtains the vehicle condition data of target vehicle.
When target vehicle generating state changes, mobile unit can obtain the vehicle condition data of the target vehicle at this time.Tool
Body can be mobile unit by controller LAN (controller area network, the CAN) bus of target vehicle with
And the sensor on the mobile unit obtains the running data of the target vehicle, can also be obtained by the CAN bus of target vehicle
Running data of the target vehicle etc. is taken, specifically acquisition modes, target carriage can be determined according to the configuration of target vehicle in itself
Configuration it is higher when then mobile unit required all vehicle condition data can be got by the CAN bus of target vehicle, match somebody with somebody
When putting relatively low, then mobile unit needs the CAN bus of target vehicle and the sensor of mobile unit to obtain institute's car in need
Condition data, do not limit specifically herein.
In the present embodiment, sensor on mobile unit can include fingerprint Identification sensor, Application on Voiceprint Recognition sensor, complete
Ball alignment system (global positioning system, GPS) sensor and acceleration transducer etc., can also include
More other kinds of sensors, do not limit specifically herein.
302nd, mobile unit is uploaded to the node server of block chain to vehicle condition data.
After mobile unit gets the vehicle condition data of target vehicle, the vehicle condition can be uploaded to the node server of block chain
Data, the data that the node server of the block chain is stored are used for the value for assessing the target vehicle.Mobile unit is by vehicle condition
After data are uploaded to the node server of block chain, the standby book node server of block chain first is backed up, and then passes through row
Sequence node server carries out the operation such as pack to data, and then the accounting nodes server of block chain tests the vehicle condition data
Demonstrate,prove, be interconnected to form block chain between the node server of block chain, accounting nodes server is by carrying out the whole network after verification
Broadcast so that each node of each node server synchronized update of block chain vehicle condition data or block chain takes
Business device automatically updates the vehicle condition data, does not limit herein specifically.
It should be noted that vehicle condition data can be uploaded to block chain by specific mobile unit herein in clear text manner
In node server, it can also be uploaded in a manner of ciphertext in the node server of block chain, do not limited herein specifically.
In the present embodiment, it can be basis that mobile unit, which is uploaded to by way of ciphertext in the node server of block chain,
Mobile unit locally generated random number is uploaded in the node server of block chain again after the vehicle condition data are encrypted.Need
It is noted that the mobile unit is one symmetrical close to the key that running data is encrypted by locally generated random number
Key, i.e., it is also to be decrypted by the symmetric key to need that the running data is decrypted on block chain.Therefore, follow-up number
According to user using the vehicle condition data when, it is necessary to which the vehicle condition data could be used by the agreement of car owner, and this improves number
According to privacy, protect the privacy of car owner.
In the embodiment of the present application, mobile unit obtains the vehicle condition data of target vehicle, and the mobile unit is by target vehicle
Vehicle condition data are uploaded in the node server of block chain, and the vehicle condition data that the node server of the block chain is stored are used for
Vehicle price evaluation device assesses the value of the target vehicle.Therefore, which is uploaded to by area by mobile unit
In block chain, subsequent vehicle price evaluation device can be obtained from the node server of block chain, and vehicle price evaluation device passes through
The price that the target vehicle is obtained from the node server of block chain is assessed, and can more accurately be carried out according to these data
Assess and calculate the value of the target vehicle, hence in so that assessment price of the vehicle price evaluation device to target vehicle is more smart
It is accurate.
In the embodiment of the present application, the node server that vehicle condition data are uploaded to block chain by mobile unit can be by close
The mode of text is uploaded vehicle condition data, can be specifically that mobile unit is encrypted according to locally generated random number, can also
It is to be encrypted by the data of other forms, does not limit herein specifically, only with mobile unit root in follow-up embodiment
Illustrated exemplified by vehicle condition data are encrypted according to locally generated random number.
In a kind of possible implementation, the target device be block chain node device, data analytics server from
Before target device obtains the vehicle condition data of the target vehicle, this method further includes：Data analytics server is to the target device
Request message is sent, which includes goal condition information, so that whether target device judges the goal condition information
Meet the intelligent treaty conditions by being registered in block chain；The target device obtains the vehicle condition data of the target vehicle, specific bag
Include：After the target device judges that the goal condition information meets the intelligence treaty conditions, data analytics server receives the mesh
The configured information that marking device is sent；Data analytics server obtains the target vehicle according to the configured information from the target device
Vehicle condition data.It should be noted that data analytics server can obtain vehicle condition data from the node server on block chain,
Vehicle condition data can be obtained from the nodal terminal on block chain, do not limited herein specifically, in follow-up embodiment, only with number
The vehicle condition data instance for obtaining the target vehicle from the node server on block chain according to Analysis server illustrates.In data
Before Analysis server obtains the vehicle condition data of target vehicle, data analytics server can send request to the target device and disappear
Breath, which includes goal condition information, so that target device judges whether the goal condition information meets by registering
Intelligent treaty conditions in block chain, in follow-up embodiment, only with data analytics server obtain vehicle condition data before
Illustrated exemplified by sending request message to the node device of block chain.In addition, when the request that data analytics server is sent disappears
When the goal condition information included in breath meets intelligent treaty conditions, if mobile unit uploads the vehicle condition number in a manner of ciphertext
According to data analytics server can receive the configured information of target device transmission, which includes the solution of vehicle condition data
Key, if mobile unit uploads vehicle condition data with clear-text way, data analytics server can directly receive vehicle condition
Data, do not limit specifically herein.In following embodiment, the finger of target device transmission is only received with data analytics server
Show message, illustrated exemplified by the decruption key which includes vehicle condition data.
In alternatively possible implementation, data analytics server judges whether the vehicle condition data are tampered specific bag
Include：Data analysis service obtains the corresponding the First Eigenvalue of vehicle condition data of the target vehicle, the fisrt feature from target device
It is worth the feature obtained for the corresponding mobile unit of the target vehicle by the vehicle condition data progress computing of unidirectional irreversible function pair
Value；Data analysis service carries out computing according to the vehicle condition data that the unidirectional irreversible function pair is got, and obtains second feature
Value.It should be noted that this unidirectionally can not inverse function can be hash function or other unidirectional irreversible encryption letters
Number, do not limit herein specifically, in follow-up embodiment, only using this unidirectionally can not inverse function carried out as an example as hash function
Explanation, then corresponding the First Eigenvalue is the first cryptographic Hash.
In alternatively possible implementation, data analytics server calculates the loss of the target vehicle according to vehicle condition data
Coefficient can be the performance number that data analytics server calculates the target vehicle according to vehicle condition data, and be calculated according to the performance number
The loss factor of the target vehicle, can also calculate the loss factor of the target vehicle by other means, not do herein specifically
Limit.Only calculate the performance number of the target vehicle in following embodiment according to vehicle condition data with data analytics server, and according to
The performance number illustrates exemplified by calculating the loss factor of the target vehicle.
In the embodiment of the present application, data analytics server can be have block chain technology equipment or individually
Third party's data analytics server, do not limit herein specifically.In follow-up embodiment, only with the data analytics server
To be illustrated exemplified by the equipment with block chain technology.
In alternatively possible implementation, after the price of the target vehicle is calculated according to the loss factor, the party
Method further includes：The price of the target vehicle is registered in block chain.It should be noted that data analytics server is by the car fare
It can be any node equipment being registered in block chain to be registered in block chain, only with registration to the data in following embodiment
Analysis server illustrates exemplified by obtaining the node server on the block chain of vehicle condition data.
In alternatively possible implementation, the price of the target vehicle is registered in block chain, is specifically included：To this
The price of target vehicle is encrypted, and obtains the encryption pricing information of the target vehicle；The encryption pricing information is registered in area
In block chain.It should be noted that data analytics server according to the vehicle condition data got calculate the target vehicle car fare it
Afterwards, it is registered in block chain or directly by the car fare and is registered in block chain after the car fare can be encrypted, is had
Body does not limit herein, and in follow-up embodiment, area is registered in after only the car fare is encrypted with data analytics server
Illustrated exemplified by block chain.
Specifically, mobile unit to the data analytics server mandate vehicle condition data can be to block by mobile unit
Node server on chain uploads contract information, and the node server which includes the mobile unit and the block chain is built
Intelligent treaty conditions in vertical contract association, data analytics server are disappeared by sending request to the node server of block chain
Breath, which includes goal condition information, when the goal condition information meets the intelligence treaty conditions, the data analysis
Server can get vehicle condition data, and one embodiment of the method for vehicle price evaluation includes in the embodiment of the present application：
It is described below by Fig. 4 embodiments：Referring to Fig. 4, in the fig. 4 embodiment, mobile unit believes contract
Breath is uploaded in accounting nodes server, and establishing contract according to contract information with the accounting nodes server of block chain associates, should
Contract information establishes the intelligent treaty conditions during contract associates, data comprising the mobile unit with the node server of the block chain
For Analysis server by sending request message to the node server of block chain, which includes goal condition information, when
When the goal condition information meets the intelligence treaty conditions, which can get vehicle condition data, the application
Another embodiment of data processing method includes in embodiment：
401st, mobile unit obtains the vehicle condition data of target vehicle.
Step 401 is similar with the step 301 in earlier figures 3, does not limit herein specifically.
402nd, e-business certification authorized organization from mobile unit to block chain (certificate authority,
CA) center sends login request message.
CA center of the mobile unit into block chain sends login request message.
There is no the execution sequencing of fixation in the present embodiment, between step 401 and step 402, step can be first carried out
401, step 402 can also be first carried out, or step 401 and step 402 are performed at the same time according to situation, do not limit herein specifically
It is fixed.
403rd, block chain CA centers send the message that succeeds in registration to mobile unit.
Block chain CA centers send the message that succeeds in registration to mobile unit, which carries rights and interests certificate,
The rights and interests certificate is used to indicate that the mobile unit is a trusted terminal, and with the data in submission or inquiry block chain
Authority.
404th, mobile unit carries out Hash operation to vehicle condition data, obtains the first cryptographic Hash.
After mobile unit gets vehicle condition data, the vehicle condition data are first backed up, then the mobile unit is according to hash function
Hash operation is carried out to the vehicle condition data of backup, obtains the first cryptographic Hash.
405th, mobile unit is encrypted vehicle condition data according to Encryption Algorithm, obtains encrypted vehicle condition data.
Mobile unit is encrypted vehicle condition data by Encryption Algorithm, obtains encrypted vehicle condition data, specifically, car
Equipment is carried vehicle condition data can be encrypted by symmetric key.Mobile unit can be according to the random number that itself is produced to car
Condition data carry out symmetric cryptography, then are also subsequently to be solved using corresponding symmetric key when being decrypted on block chain
It is close.Specifically, which can be what mobile unit was generated according to the identity number (identity, ID) of the user.
406th, mobile unit carries out data signature to vehicle condition data, contract information and the first cryptographic Hash.
Mobile unit carries out data label according to the vehicle condition data after private key pair encryption, contract information and the first cryptographic Hash
The public key of the target vehicle carried in the rights and interests certificate that name, the private key and block chain CA centers are issued has correspondence,
For identifying the vehicle condition data that the vehicle condition data are the target vehicle.It should be noted that contract information is believed including agreement terms
Breath and promise contract, can also include more contract informations, not limit herein specifically.Wherein, agreement terms information is
Data analytics server is using the cost information needed for the vehicle condition data and uses the vehicle condition data correlation promise contract, is used for
Subsequent data analysis server can by the contract information using must prepay before the vehicle condition data corresponding expense and
It is corresponding to promise to undertake that contract, such as data user promise to undertake the privacy of protection car owner, data confidentiality is not outwards propagated and
The responsibility that must be born by after data analytics server goes out leaking data and corresponding indemnity etc., specifically herein
Do not limit.
407th, vehicle condition data, contract information and the first cryptographic Hash are uploaded to block chain node server by mobile unit.
After mobile unit gets vehicle condition data, mobile unit is by the vehicle condition data, preset contract information and first
Cryptographic Hash is uploaded to block chain accounting nodes server.It should be noted that mobile unit only needs to upload vehicle condition in first time
Contract information is uploaded to before data the node server of block chain, the node server for block chain disposes contract letter
Breath, follow-up mobile unit upload vehicle condition data and avoid the need for uploading the contract information again again.
408th, data analytics server sends request message to block chain node server.
Data analytics server sends request message to block chain node server, which is used to indicate the data analysis
Server asks to obtain the vehicle condition data of the target vehicle from block chain node server, which believes comprising goal condition
Breath, the goal condition information is associated with the intelligent treaty conditions in contract information, when the goal condition information and contract information
When middle intelligence treaty conditions are consistent, then block chain node server pushes the solutions of the vehicle condition data to data analytics server at this time
Key.Wherein, when block chain node server determines that the goal condition is consistent with intelligent treaty conditions, system can basis
The goal condition determines to open whole vehicle condition data or partial data to data analytics server, specifically insufficient herein to limit.
It should be noted that the goal condition information can be default password in contract information intelligence treaty conditions,
It can be default data signature information in contract information intelligence treaty conditions, not limit herein specifically.
409th, data analytics server receives the configured information that block chain link point server is sent.
After data analytics server sends request message to the node server of block chain, block chain node clothes are received
The configured information that business device is sent, the configured information carry the decruption key of the vehicle condition data.
410th, data analytics server reads vehicle condition data and the according to the configured information from block chain node server
One cryptographic Hash.
411st, data analytics server carries out Hash operation according to hash function to vehicle condition data, obtains the second cryptographic Hash.
412nd, data analytics server judges whether the first cryptographic Hash is consistent with the second cryptographic Hash, if unanimously, performing step
Rapid 414, if inconsistent, perform step 413.
Data analytics server judges whether two cryptographic Hash are consistent, such as according to the first cryptographic Hash and the second cryptographic Hash
Fruit is consistent, then step 414 is performed, if inconsistent, then performs step 413.
413rd, data analytics server performs other operations.
When the first cryptographic Hash and the second cryptographic Hash are inconsistent, illustrate that vehicle condition data are tampered with transmitting procedure, that
Data analytics server can reacquire the operation such as the vehicle condition data at this time, not limit herein specifically.
414th, data analytics server calculates the performance number of the target vehicle and according to the performance number meter according to vehicle condition data
Calculate the loss factor of the target vehicle.
After data analytics server gets vehicle condition data, data analytics server calculates the target carriage according to vehicle condition data
Performance number, and calculate according to the performance number loss factor of the target vehicle.Specifically, such as data analytics server obtains
Get the mileage of target vehicle, then data analytics server can calculate the corresponding performance of the mileage according to preset algorithm
Value, such as the data analytics server get the maintenance record of the target vehicle, count the number of target vehicle maintenance, root
According to preset algorithm, each maintenance record corresponds to the certain performance number of reduction or data analytics server obtains the mesh
The maintenance record of vehicle is marked, counts the maintenance number of the target vehicle, each maintenance record increases certain performance number, finally unites
The performance number is counted, loss factor corresponding with the performance number, wherein performance number and loss factor are being determined just further according to the performance number
Correlation, therefore, the loss factor of the target vehicle is calculated by algorithm, and the driving range number of target vehicle is few, is maintained often,
Driving behavior is good, then loss factor will be improved accordingly, then loss factor is subsequently multiplied by the purchasing price of target vehicle
Obtaining the value of the target vehicle will be correspondingly improved.
415th, data analytics server calculates the car fare of target vehicle according to loss factor.
Step 411 is similar with step 204 in earlier figures 2, and specific details are not described herein again.
416th, data analytics server calculates target vehicle to the car fare of target vehicle and is encrypted, and obtains encrypted car
Valency.
After data analytics server assesses the car fare of the target vehicle by loss factor, which is encrypted, is obtained
To encrypted car fare.Can be specifically that data analytics server adds the car fare according to locally generated random data
It is close or be encrypted by other means, do not limit herein specifically.
417th, encrypted car fare is uploaded to block chain accounting nodes server by data analytics server.
Encrypted car fare is uploaded to the accounting nodes server of block chain, then, the book keeping operation by data analytics server
Node server can verify the car fare, and after verification, then accounting nodes server carries out the whole network broadcast, then at this time
Each node server synchronized update car fare of block chain.
In the embodiment of the present application, data analytics server obtains the vehicle condition data of target vehicle, data from target device
Analysis server judges whether the vehicle condition data are tampered, if the vehicle condition data are not tampered with, then data analytics server root
The loss factor of the target vehicle is calculated according to the vehicle condition data, then data analytics server calculates the mesh according to the loss factor
Mark the price of vehicle.Therefore, the vehicle condition data for the target vehicle for determining to get by data analytics server are not tampered with it
Afterwards, then data analytics server calculates the price of the target vehicle by the vehicle data, being capable of more accurate evaluation mesh
Mark the value of vehicle so that the assessment price to target vehicle is more accurate.
The vehicle price evaluation method in the embodiment of the present application is described above, below in the embodiment of the present application
Vehicle price evaluation device be described, referring to Fig. 5, wherein, transmitting element 505 and registration unit 506 is can menus
Member, one embodiment of vehicle price evaluation device includes in the embodiment of the present application：
Acquiring unit 501, for obtaining the vehicle condition data of target vehicle from target device；
Judging unit 502, for judging whether the vehicle condition data are tampered；
First computing unit 503, for calculating the loss factor of the target vehicle according to the vehicle condition data；
Second computing unit 504, for calculating the price of the target vehicle according to the loss factor.
In the present embodiment, which further includes：
Transmitting element 505, for sending request message to the target device, which includes goal condition information,
So that the target device judges whether the goal condition information meets the intelligent contract being registered in by the target device in block chain
Condition；
Acquiring unit 501, the configured information specifically for receiving target device transmission；According to the configured information from the mesh
Marking device obtains the vehicle condition data of the target vehicle.
In the present embodiment, which is specifically used for the vehicle condition number that the target vehicle is obtained from the target device
According to corresponding the First Eigenvalue, which passes through unidirectional irreversible function pair for the corresponding mobile unit of the target vehicle
The vehicle condition data carry out the characteristic value that computing obtains；Transported according to the vehicle condition data that the unidirectional irreversible function pair is got
Calculate, obtain Second Eigenvalue；Judge whether the Second Eigenvalue is consistent with the First Eigenvalue；It is if consistent, it is determined that the vehicle condition
Data are not tampered with.
In the present embodiment, the first computing unit 503 is specifically used for the performance that the target vehicle is calculated according to the vehicle condition data
It is worth, and the loss factor of the target vehicle is calculated according to the performance number of the target vehicle, wherein, the performance number and the loss factor
Positive correlation.
In the present embodiment, which further includes：
Registration unit 506, for the price of the target vehicle to be registered in block chain.
In the present embodiment, which is specifically used for the price of the target vehicle is encrypted, and obtains described
The encryption pricing information of target vehicle；The encryption pricing information is registered in block chain.
In the embodiment of the present application, acquiring unit 501 obtains the vehicle condition data of target vehicle, judging unit from target device
502 judge whether the vehicle condition data are tampered, if the vehicle condition data are not tampered with, then the first computing unit 503 is according to the car
Condition data calculate the loss factor of the target vehicle, and then the second computing unit 504 calculates the target carriage according to the loss factor
Price.Therefore, after the vehicle condition data for the target vehicle for judging to get by judging unit 502 are not tampered with, then
The price of the target vehicle is calculated by second computing unit 504 vehicle data, being capable of more accurate evaluation target vehicle
Value so as to target vehicle assessment price it is more accurate.
The method of the vehicle price evaluation in the embodiment of the present application is described above, below to the embodiment of the present application
In mobile unit be described, referring to Fig. 6, wherein, leaflet in the second uploading unit 603, arithmetic element 604 and the 3rd
Member 605 is selectable unit, and one embodiment of mobile unit includes in the embodiment of the present application：
Acquiring unit 601, for obtaining the vehicle condition data of target vehicle；
Uploading unit 602, for the vehicle condition data to be uploaded to the node server of block chain, the node clothes of the block chain
The vehicle condition data that business device is stored are used for the value that vehicle price evaluation device assesses the target vehicle.
In the present embodiment, acquiring unit 601 is specifically used for by the CAN bus of the target vehicle and the mobile unit
Sensor obtains the vehicle condition data of the target vehicle；Alternatively, the car of the target vehicle is obtained by the CAN bus of the target vehicle
Condition data.
In the present embodiment, the first uploading unit 602 is specifically used for the vehicle condition data are encrypted according to Encryption Algorithm, obtains
To encrypted vehicle condition data；The encrypted vehicle condition data are uploaded to the node server of the block chain.
In the present embodiment, which further includes：
Second uploading unit 603, for uploading contract information, the contract information to the node server of the block chain
Node server comprising the mobile unit and the block chain establishes the associated intelligent treaty conditions of contract.
In the present embodiment, which further includes：
Arithmetic element 604, for obtaining the First Eigenvalue by the vehicle condition data progress computing of unidirectional irreversible function pair；
3rd uploading unit 605, for the First Eigenvalue to be uploaded to the node server of the block chain.
In the present embodiment, in the embodiment shown in flow and earlier figures 3 and Fig. 4 in mobile unit performed by each unit
Method flow performed by the mobile unit of description is similar, and details are not described herein again.
In the embodiment of the present application, acquiring unit 601 obtains the vehicle condition data of target vehicle, and the first uploading unit 602 is by mesh
The vehicle condition data of mark vehicle are uploaded in the node server of block chain, the vehicle condition number that the node server of the block chain is stored
According to the value that the target vehicle is assessed for vehicle price evaluation device.Therefore, by mobile unit by the vehicle condition data
Reach in block chain, subsequent vehicle price evaluation device can be obtained from the node server of block chain, vehicle price evaluation dress
Put and assessed by obtaining the price of the target vehicle from the node server of block chain, can more accurately be counted according to these
According to being assessed and calculating the value of the target vehicle, hence in so that assessment price of the data user to target vehicle is more smart
It is accurate.
The application also provides a kind of vehicle price evaluation device 700, referring to Fig. 7, vehicle price in the embodiment of the present application
700 one embodiment of apparatus for evaluating includes：
Processor 701, memory 702, input-output equipment 703 and bus 704；
The processor 701, memory 702, input-output equipment 703 are connected with bus 704 respectively, in the memory 702
It is stored with computer instruction；
The input-output equipment 703 is used for the vehicle condition data that target vehicle is obtained from target device；
The processor 701 is used to judge whether the vehicle condition data are tampered；The target vehicle is calculated according to the vehicle condition data
Loss factor；The price of the target vehicle is calculated according to the loss factor.
In a kind of possible implementation, which is additionally operable to send request message to the target device,
The request message includes goal condition information, so that the target device judges whether the goal condition information meets to be set by the target
The standby intelligent treaty conditions being registered in block chain；Receive the configured information of target device transmission；According to the configured information from
The target device obtains the vehicle condition data of the target vehicle.
In alternatively possible implementation, which is specifically used for obtaining the target carriage from the target device
The corresponding the First Eigenvalue of vehicle condition data, which is the corresponding mobile unit of the target vehicle by unidirectionally not
Invertible function carries out the vehicle condition data characteristic value that computing obtains；The vehicle condition got according to the unidirectional irreversible function pair
Data carry out computing, obtain Second Eigenvalue；Judge whether the Second Eigenvalue is consistent with the First Eigenvalue；If consistent,
Determine that the vehicle condition data are not tampered with.
In alternatively possible implementation, which is specifically used for calculating the target carriage according to the vehicle condition data
Performance number, and calculate according to the performance number of the target vehicle loss factor of the target vehicle, wherein, the performance number with should
Loss factor positive correlation.
In alternatively possible implementation, which is additionally operable to the price of the target vehicle being registered in block
In chain.
In alternatively possible implementation, which is specifically used for adding the price of the target vehicle
It is close, obtain the encryption pricing information of the target vehicle；The encryption pricing information is registered in block chain.
The application also provides a kind of mobile unit 800, referring to Fig. 8,800 1 realities of mobile unit in the embodiment of the present application
Applying example includes：
Processor 801, memory 802, input-output equipment 803 and bus；
The processor 801, memory 802, input-output equipment 803 are connected with bus 804 respectively, in the memory 802
It is stored with computer instruction；
The input-output equipment 803 is used for the vehicle condition data for obtaining target vehicle；
The processor 801 is used for the node server that the vehicle condition data are uploaded to block chain, the node clothes of the block chain
The vehicle condition data that business device is stored are used for the value that vehicle price evaluation device assesses the target vehicle.
In a kind of possible implementation, which is specifically used for the CAN bus by the target vehicle
And the sensor of the mobile unit obtains the vehicle condition data of the target vehicle；Alternatively, obtained by the CAN bus of the target vehicle
Take the vehicle condition data of the target vehicle.
In alternatively possible implementation, the processor 801 be specifically used for according to Encryption Algorithm to the vehicle condition data into
Row encryption, obtains encrypted vehicle condition data；The encrypted vehicle condition data are uploaded to the node server of the block chain.
In alternatively possible implementation, which is additionally operable to the node server upload to the block chain
Contract information, the contract information include the intelligent contract bar that the mobile unit is registered in the node server of the block chain
Part.
In alternatively possible implementation, which is additionally operable to by the unidirectional irreversible function pair vehicle condition number
The First Eigenvalue is obtained according to computing is carried out；The First Eigenvalue is uploaded to the node server of the block chain.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, may be referred to the corresponding process in preceding method embodiment, details are not described herein.
In several embodiments provided herein, it should be understood that disclosed system, apparatus and method can be with
Realize by another way.For example, device embodiment described above is only schematical, for example, the unit
Division, is only a kind of division of logic function, can there is other dividing mode, such as multiple units or component when actually realizing
Another system can be combined or be desirably integrated into, or some features can be ignored, or do not perform.It is another, it is shown or
The mutual coupling, direct-coupling or communication connection discussed can be the indirect coupling by some interfaces, device or unit
Close or communicate to connect, can be electrical, machinery or other forms.
The unit illustrated as separating component may or may not be physically separate, be shown as unit
The component shown may or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
In network unit.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs
's.
In addition, each functional unit in each embodiment of the application can be integrated in a processing unit, can also
That unit is individually physically present, can also two or more units integrate in a unit.Above-mentioned integrated list
Member can both be realized in the form of hardware, can also be realized in the form of SFU software functional unit.
If the integrated unit is realized in the form of SFU software functional unit and is used as independent production marketing or use
When, it can be stored in a computer read/write memory medium.Based on such understanding, the technical solution of the application is substantially
The part to contribute in other words to the prior art or all or part of the technical solution can be in the form of software products
Embody, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server, or network equipment etc.) performs the complete of each embodiment the method for the application
Portion or part steps.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can store journey
The medium of sequence code.
The above, above example is only to illustrate the technical solution of the application, rather than its limitations；Although with reference to before
Embodiment is stated the application is described in detail, it will be understood by those of ordinary skill in the art that：It still can be to preceding
State the technical solution described in each embodiment to modify, or equivalent substitution is carried out to which part technical characteristic；And these
Modification is replaced, and the essence of appropriate technical solution is departed from the spirit and scope of each embodiment technical solution of the application.
Claims (10)
- A kind of 1. method of vehicle price evaluation, it is characterised in that the described method includes：The vehicle condition data of target vehicle are obtained from target device；Judge whether the vehicle condition data are tampered；If it is not, the loss factor of the target vehicle is then calculated according to the vehicle condition data；The price of the target vehicle is calculated according to the loss factor.
- 2. according to the method described in claim 1, it is characterized in that, the target device is the node device of block chain；Institute State before the vehicle condition data that target device obtains target vehicle, the method further includes：Request message is sent to the target device, the request message includes goal condition information, so that the target device Judge whether the goal condition information meets the intelligent treaty conditions being registered in by the target device in block chain；The vehicle condition data that target vehicle is obtained from target device, specifically include：After the target device judges that the goal condition information meets the intelligent treaty conditions, the target device is received The configured information of transmission；The vehicle condition data of the target vehicle are obtained from the target device according to the configured information.
- 3. according to the method described in claim 1, it is characterized in that, described judge whether the vehicle condition data are tampered, specifically Including：The corresponding the First Eigenvalue of vehicle condition data of the target vehicle is obtained from the target device, the First Eigenvalue is The corresponding mobile unit of the target vehicle carries out the feature that computing obtains by vehicle condition data described in unidirectional irreversible function pair Value；Computing is carried out according to the vehicle condition data that the unidirectional irreversible function pair is got, obtains Second Eigenvalue；Judge whether the Second Eigenvalue is consistent with the First Eigenvalue；It is if consistent, it is determined that the vehicle condition data are not tampered with.
- 4. according to the method in any one of claims 1 to 3, it is characterised in that described to be calculated according to the vehicle condition data The loss factor of the target vehicle, specifically includes：The performance number of the target vehicle is calculated according to the vehicle condition data, and institute is calculated according to the performance number of the target vehicle The loss factor of target vehicle is stated, wherein, the performance number and the loss factor positive correlation.
- 5. according to the method in any one of claims 1 to 3, it is characterised in that described according to the loss factor meter After the price for calculating the target vehicle, the method further includes：The price of the target vehicle is registered in block chain.
- 6. according to the method described in claim 5, it is characterized in that, the price by the target vehicle is registered in block chain In, specifically include：The price of the target vehicle is encrypted, obtains the encryption pricing information of the target vehicle；The encryption pricing information is registered in block chain.
- 7. a kind of vehicle price evaluation device, it is characterised in that the vehicle price evaluation device includes：Acquiring unit, for obtaining the vehicle condition data of target vehicle from target device；Judging unit, for judging whether the vehicle condition data are tampered；First computing unit, for calculating the loss factor of the target vehicle according to the vehicle condition data；Second computing unit, for calculating the price of the target vehicle according to the loss factor.
- 8. vehicle price evaluation device according to claim 7, it is characterised in that the target device is the section of block chain Point device；The vehicle price evaluation device further includes：Transmitting element, for sending request message to the target device, the request message includes goal condition information, so that The target device judges that the intelligence whether the goal condition information meets to be registered in block chain by the target device is closed About condition；The acquiring unit is specifically used for receiving the configured information that the target device is sent；According to the configured information from described Target device obtains the vehicle condition data of the target vehicle.
- 9. vehicle price evaluation device according to claim 7, it is characterised in that the judging unit is specifically used for：The corresponding the First Eigenvalue of vehicle condition data of the target vehicle is obtained from the target device, the First Eigenvalue is The corresponding mobile unit of the target vehicle carries out the feature that computing obtains by vehicle condition data described in unidirectional irreversible function pair Value；Computing is carried out according to the vehicle condition data that the unidirectional irreversible function pair is got, obtains Second Eigenvalue；Judge institute It is whether consistent with the First Eigenvalue to state Second Eigenvalue；It is if consistent, it is determined that the vehicle condition data are not tampered with.
- 10. the vehicle price evaluation device according to any one of claim 7 to 9, it is characterised in that described first calculates Unit is specifically used for：The performance number of the target vehicle is calculated according to the vehicle condition data, and institute is calculated according to the performance number of the target vehicle The loss factor of target vehicle is stated, wherein, the performance number and the loss factor positive correlation.
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