CN111006692A - Method for rapidly correcting vehicle speed and mileage of commercial vehicle instrument based on development of diagnostic instrument - Google Patents
Method for rapidly correcting vehicle speed and mileage of commercial vehicle instrument based on development of diagnostic instrument Download PDFInfo
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- CN111006692A CN111006692A CN201911206664.2A CN201911206664A CN111006692A CN 111006692 A CN111006692 A CN 111006692A CN 201911206664 A CN201911206664 A CN 201911206664A CN 111006692 A CN111006692 A CN 111006692A
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000011161 development Methods 0.000 title claims abstract description 11
- 238000013475 authorization Methods 0.000 claims description 23
- 230000004913 activation Effects 0.000 claims description 18
- 230000006855 networking Effects 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 238000012937 correction Methods 0.000 description 20
- 230000005540 biological transmission Effects 0.000 description 6
- 239000011800 void material Substances 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
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- 230000008569 process Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C25/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
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Abstract
The technical scheme adopted by the invention is as follows: a method for rapidly correcting vehicle speed and mileage of a commercial vehicle instrument based on development of a diagnostic instrument is characterized by comprising the following steps: the vehicle end is electrically connected with the PC end through a diagnostic instrument; the PC terminal and the server carry out identity authentication; the PC end obtains a set value of a parameter to be adjusted and a corresponding original value of the parameter, and calculates a new pulse number, namely a K value, generated by the speed sensor per kilometer according to the adjusted set value; the PC end writes the acquired external parameters and the calculated new K value into an instrument of the vehicle end through a diagnostic instrument; and the instrument at the vehicle end corrects the vehicle speed and the mileage according to the new K value. The invention aims to provide a method for rapidly correcting the speed and the mileage of a commercial vehicle instrument based on the development of a diagnostic instrument, aiming at the defects of the prior art, and the method can be used for remotely updating vehicle-end software.
Description
Technical Field
The invention relates to the technical field of diagnostic instrument development, in particular to a method for quickly correcting vehicle speed and mileage of a commercial vehicle instrument based on diagnostic instrument development.
Background
When the commercial vehicle maintains the transmission assembly system and needs to change the configuration of a gearbox, a drive axle or wheels, the original values of the calculated vehicle speed and the calculated mileage in the instrument also need to be reset. Since neither the user nor the service station has the condition for resetting the instrument parameters, the instrument software designer is required to write the software on site.
Commercial vehicle belongs to profitable vehicle, and its profitability is directly influenced to maintenance timeliness. If a transmission assembly system is maintained, after a gearbox, a drive axle or wheels are replaced, instrument software designers must wait for software to be written on site, maintenance efficiency is greatly influenced, vehicle utilization rate is reduced, user profit is indirectly influenced, and user satisfaction is directly influenced.
The reference factors for setting the speed and the mileage in the instrument are more, the instrument must meet the requirements of regulations, and the set authority cannot be completely opened to users or service stations. Once the configuration of the transmission assembly is changed, an instrument software designer needs to write software on site, and then travelling cost, labor cost and the like can be generated; if vehicles in the market replace the transmission assemblies in batches, not only the labor cost is increased rapidly, but also the software flashing progress is influenced due to insufficient human resources, so that the vehicle utilization rate is influenced.
Disclosure of Invention
The invention aims to provide a method for quickly correcting the speed and the mileage of a commercial vehicle instrument based on diagnostic instrument development aiming at the defects of the prior art, and the method can be used for remotely updating vehicle-end software.
The technical scheme adopted by the invention is as follows: a method for rapidly correcting vehicle speed and mileage of a commercial vehicle instrument based on development of a diagnostic instrument is characterized by comprising the following steps:
the vehicle end is electrically connected with the PC end through a diagnostic instrument; the PC terminal and the server carry out identity authentication; the PC end obtains a set value of a parameter to be regulated and a corresponding original value thereof, and calculates a new pulse number, namely a K value, generated by the vehicle speed sensor per kilometer according to the regulated set value; the PC end writes the acquired external parameters and the calculated new K value into an instrument of the vehicle end through a diagnostic instrument; and the instrument at the vehicle end corrects the vehicle speed and the mileage according to the new K value.
In the technical scheme, the PC terminal automatically stores the original data and the reset data related to the K value into a diagnostic instrument database of the PC terminal.
In the technical scheme, when the PC terminal is in a networking state, the data in the database of the phase diagnostic instrument is automatically transmitted to the server.
In the technical scheme, the external adjusting parameters comprise the changed speed ratio of the drive axle, the model number of the tire of the drive axle, the speed ratio of the odometer and the number of pulses per revolution of the sensor, and a user selects the parameters to be adjusted according to actual conditions.
In the above technical solution, the K value is obtained by calculating according to the following formula:
wherein, i: drive axle speed ratio
i': odometer ratio, ratio from gearbox output shaft to speed sensor
R: radius m of wheel
N: the number of pulses per revolution of the vehicle speed sensor.
In the technical scheme, the external adjusting parameters further comprise a K value adjusting proportion, the diagnostic instrument automatically calculates a new K value according to the K value adjusting proportion and a calculation result of the PC end, the new K value is written into the instrument, and the vehicle speed and the mileage of the instrument are automatically updated.
In the above technical solution, the vehicle speed calculation formula is as follows:
v: vehicle speed, unit km/h
f: vehicle speed pulse frequency.
In the above technical solution, the mileage calculation formula is as follows:
m: mileage km
T: total number of pulses.
In the above technical solution, the method further comprises the following steps:
before the PC end is electrically connected with the vehicle end through the diagnostic instrument, the main switch of the vehicle power supply is firstly confirmed to be opened, and the ignition lock is in an ON gear state.
In the above technical solution, the authentication comprises the following steps:
the PC terminal generates a random code according to a user instruction, the user sends the random code to the server, the server generates an activation code according to the random code and feeds the activation code back to the user, the user inputs the activation code into the PC terminal, the PC terminal calculates the results of the activation code and the authorization code, and subsequent steps can be carried out only if the activation code and the authorization code completely accord with each other. The user is the after-sales part of the telephone connection main machine factory, the reason for correcting the speed and mileage is explained (the engine, the gearbox, the drive axle, the tires and the like are changed), and after-sales registration information is obtained, the user is informed of the activation code. After the user corrects the vehicle speed mileage, the correction data is automatically uploaded to a background server, and the background data is periodically checked to be consistent with the registration information after sale.
The invention analyzes the influence of the change of the transmission assembly on the speed and mileage of the instrument, and sets the K value for calculation. The invention uses the upper computer (diagnostic instrument development) to solve the problem of lower computer (instrument speedometer mileage correction), improves the service timeliness and shortens the maintenance time by at least 3 days. The PC terminal and the server carry out mutual identity authentication through the random code and the authorization code, thereby effectively preventing the data of the control system from being illegally changed. Each correction record of the vehicle speed mileage of the instrument is stored in the background PC end of the host factory and the server, so that later maintenance analysis, operation analysis and the like of the host factory are facilitated.
Drawings
FIG. 1 is a schematic view of a vehicle speed mileage correction authorization interface;
FIG. 2 is a schematic view of a vehicle speed range correction interface;
FIG. 3 is a schematic diagram of random code generation;
FIG. 4 is an authorization code verification diagram;
fig. 5 is a schematic illustration of the correction interface filling.
Detailed Description
The invention will be further described in detail with reference to the following drawings and specific examples, which are not intended to limit the invention, so as to clearly understand the invention.
The invention provides a rapid speed and mileage correction method for a commercial vehicle instrument based on diagnostic instrument development, which is characterized by comprising the following steps:
the vehicle end is electrically connected with the PC end through a diagnostic instrument; the PC terminal and the server carry out identity authentication; the PC end obtains a set value of a parameter to be regulated and a corresponding original value thereof, and calculates a new pulse number, namely a K value, generated by the vehicle speed sensor per kilometer according to the regulated set value; the PC end writes the acquired external parameters and the calculated new K value into an instrument of the vehicle end through a diagnostic instrument; and the instrument at the vehicle end corrects the vehicle speed and the mileage according to the new K value.
In the technical scheme, in the process of closing the interface of the PC-side diagnostic instrument, original data and reset data related to the K value of the instrument can be automatically stored in a database of the PC-side diagnostic instrument. If the PC is in a networking state at that time, the PC end automatically transmits data in the database of the diagnostic instrument to a background server of the host factory; if the PC is not networked at that time, the PC end can automatically transmit the data in the database of the diagnostic instrument into the background server of the host computer factory when the PC is networked next time.
In the technical scheme, the external adjusting parameters comprise the changed speed ratio of the drive axle, the model number of the tire of the drive axle, the speed ratio of the odometer and the number of pulses per revolution of the sensor.
In the above technical solution, the change of the transmission assembly (gearbox, transaxle, wheel) has no influence on f (vehicle speed pulse frequency) and T (total pulse number), and only has influence on K (pulse number generated by a vehicle speed sensor per kilometer).
The K value calculation formula is as follows:
K＝B·N
k: number of pulses generated by speed sensor per kilometer
B: gauge-head factor, i.e. number of revolutions per kilometer of revolution of signal from speed sensor
N: number of pulses per revolution of vehicle speed sensor
The calculation formula of the B value is as follows:
i: drive axle speed ratio
i': odometer ratio, ratio from gearbox output shaft to speed sensor
R: radius m of wheel
The K value calculation formula is modified as follows:
gearbox changes affect the i' and N values, drive axle changes affect the i value, and wheel changes affect the R value.
A vehicle speed and mileage correction system of the instrument is developed through a diagnostic instrument, and is operated by a service station to input the changed speed ratio of a drive axle, the model number of tires of the drive axle, the speed ratio of an odometer and the number of pulses per revolution of a sensor. According to the requirement of GB 15082, the speed of the vehicle is 2% larger than that calculated by K value, then K value adjustment proportion is set, the diagnostic instrument automatically calculates new K value, the new K value is written into the instrument, and the speed and mileage of the instrument are automatically updated.
In the technical scheme, the speed sensor is arranged at the output shaft of the gearbox, K is the number of pulses generated by the speed sensor per kilometer, and the calculation formula of the speed and the mileage is as follows:
v: vehicle speed, unit km/h
f: vehicle speed pulse frequency.
In the above technical solution, the mileage calculation formula is as follows:
m: mileage km
T: total number of pulses.
In the above technical solution, the method further comprises the following steps:
before the PC end is electrically connected with the vehicle end through the diagnostic instrument, the main switch of the vehicle power supply is firstly confirmed to be opened, and the ignition lock is in an ON gear state.
In the above technical solution, the authentication comprises the following steps:
the PC terminal generates a random code according to a user instruction, the user sends the random code to the server, the server generates an activation code according to the random code and sends the activation code to the user, the user inputs the activation code into the PC terminal, the PC calculates the results of the activation code and the authorization code, and subsequent steps can be carried out only if the activation code and the authorization code completely conform to each other.
Specific embodiment 1 provides an authorization interface, as shown in fig. 1, in order to ensure that a user or a service station cannot change a K value of a meter at will, an authorization interface needs to be created. And after the authorization is successful, namely the identity authentication is successful, entering a range mileage correction false face, inputting new configuration parameters and executing correction as shown in figure 2.
The main functions/methods for realizing authorization between the PC side and the server are as follows: a login function: private void INSWriteKDaCheck _ Load (object sender, EventArgs e); generating a random code function: privatevoid btn _ CreateCode _ Click (object sender, EventArgs e); calculate the activate code function: privateStringRegCode (StringStrCode); entering a correction interface function: private void btn _ Active _ Click (object sender, eventArgs e). In the function of the entry correction interface, if the result of calculating the activation code does not match (regcode (randumnum) | tb _ regnum. text) the user inputs to the blank frame of the authorization code, the authorization code is displayed invalid and the entry correction interface cannot be entered. Only if the activation code and the authorization code match completely can the authorization interface be successfully entered.
The correction implements the main functions/methods: a login function: private void INSWriteKData _ Load (objectsender, EventArgs e); reading meter calibration value function: private void getTable (stringEcuCode); calculating a tire radius value function: private double GetTireValue (string Tiretype); start the flash function: private void btn _ Push _ Click (object sender, eventArgs e); writing a calibration data function: private int StartINSPushWrite ().
Uploading a background server main function/method: public void Insert _ network _ mileagecorrect (string data _ before, string data _ after, string result).
The specific embodiment 2 provides an application scenario of a user plane, which specifically includes the following contents:
the first step is as follows: the vehicle end is connected to the PC end through the diagnostic instrument, and the service station operates the PC end and is connected with the instrument. Before connection, the power supply main switch is confirmed to be opened, and the ignition lock is in an ON gear state.
The second step is that: activating the function of' speed mileage correction
The vehicle speed mileage correction function needs authorization, clicks 'generate random code', clicks 'copy' after the random code is generated, and sends the random code to a host factory to obtain the authorization code, and at this time, an authorization interface does not need to be closed, as shown in fig. 3.
The host factory feeds back the authorization code to the service station, and the service station clicks the 'entering speed and mileage correction interface' after copying and pasting the authorization code. Each authorization can be flashed only once, as shown in fig. 4.
The third step: using a "vehicle speed mileage correction function"
As shown in FIG. 5, the speedometer calibration interface has five parameters, which are activated when the previous boxes are checked, if selected. The 'original configuration' is the current parameter of the vehicle, and the 'new configuration' is the parameter to be modified. After the parameters are configured, clicking 'start flashing', and presenting a prompt of 'speed and mileage correction success' to indicate that the correction is successful.
Item 1, "transaxle speed ratio", if the transaxle is replaced, this item needs to be selected. If the speed ratio of the original vehicle driving axle is 3.909 and the speed ratio of the modified driving axle is 4.44, filling 3.909 on the original configuration side and filling 4.44 on the new configuration side.
Item 2, "transaxle tire model", this item needs to be selected if the transaxle tire is replaced. If the original vehicle drive axle tire is 275/70R22.5, the new configuration is 295/80R 22.5.
Item 3 "odometer ratio", which needs to be checked if the gearbox is replaced. The non-contact defaults to 1:1, and the contact needs to adjust the parameter.
Item 4 "number of pulses per revolution of sensor", if the gearbox is replaced, this item needs to be checked. The number of teeth of the signal disc of the tail shaft of the gearbox is mostly 8 pulses, 6 pulses, 12.214 pulses and the like.
The 5 th item of 'K value adjustment proportion' can be modified only when the vehicle speed and the mileage have large deviation, and the vehicle speed and the mileage are in inverse proportion to the parameters.
If the original vehicle parameters are completely wrong and need to be matched again, the results can be calculated by checking 1 item, 2 item, 3 item and 4 item.
The PC end writes the acquired external parameters and the calculated new K value into an instrument of the vehicle end through a diagnostic instrument; and the instrument at the vehicle end corrects the vehicle speed and the mileage according to the new K value. After the operation is finished, the original data and the reset data are automatically transmitted to a server of a background of a host factory. The post-stage of the returned data can be subjected to operation analysis, behavior analysis and safety analysis.
TABLE 1 host factory background Server store data patterns
TABLE 1 host factory background Server store data patterns
Details not described in the specification are known to those skilled in the art.
Claims (10)
1. A method for rapidly correcting vehicle speed and mileage of a commercial vehicle instrument based on development of a diagnostic instrument is characterized by comprising the following steps:
the vehicle end is electrically connected with the PC end through a diagnostic instrument; the PC terminal and the server carry out identity authentication; the PC end obtains a set value of a parameter to be adjusted and a corresponding original value of the parameter, and calculates a new pulse number, namely a K value, generated by the speed sensor per kilometer according to the adjusted set value; the PC end writes the acquired external parameters and the calculated new K value into an instrument of the vehicle end through a diagnostic instrument; and the instrument at the vehicle end corrects the vehicle speed and the mileage according to the new K value.
2. The method for rapidly correcting the vehicle speed and mileage of the commercial vehicle meter developed based on the diagnostic instrument as claimed in claim 1, wherein the PC terminal automatically stores the K value related original data and reset data into the database of the diagnostic instrument of the PC terminal.
3. The method for rapidly correcting the vehicle speed and mileage of the commercial vehicle meter developed based on the diagnostic instrument as claimed in claim 2, wherein the data in the database of the diagnostic instrument is automatically transmitted to the server when the PC terminal is in the networking state.
4. The method for rapidly correcting the vehicle speed and mileage of the commercial vehicle meter developed based on the diagnostic instrument as claimed in claim 1, wherein the parameters to be adjusted include the changed speed ratio of the drive axle, the model number of the tire of the drive axle, the speed ratio of the odometer, the number of pulses per revolution of the sensor, and the parameters to be adjusted are selected by the user according to actual conditions.
5. The method for rapidly correcting the vehicle speed and mileage of the commercial vehicle instrument developed based on the diagnostic instrument as claimed in claim 4, wherein the K value is obtained by calculating according to the following formula:
wherein, i: drive axle speed ratio
i': odometer ratio, ratio from gearbox output shaft to speed sensor
R: radius m of wheel
N: the number of pulses per revolution of the vehicle speed sensor.
6. The method of claim 5, wherein the external parameters further include a K-value adjustment ratio, the diagnostic device automatically calculates a new K-value according to the K-value adjustment ratio and the calculation result of the PC terminal, writes the new K-value into the instrument, and automatically updates the vehicle speed and mileage of the instrument.
7. The method for rapidly correcting the vehicle speed and mileage of the commercial vehicle instrument developed based on the diagnostic instrument as claimed in claim 6, wherein the vehicle speed calculation formula is as follows:
v: vehicle speed, unit km/h
f: vehicle speed pulse frequency.
8. The method for rapidly correcting the vehicle speed and mileage of the commercial vehicle instrument developed based on the diagnostic instrument as claimed in claim 6, wherein the mileage calculation formula is as follows:
m: mileage km
T: total number of pulses.
9. The method for rapidly correcting the vehicle speed and mileage of the commercial vehicle instrument developed based on the diagnostic instrument as claimed in claim 1, is characterized by further comprising the following steps: before the PC end is electrically connected with the vehicle end through the diagnostic instrument, the main switch of the vehicle power supply is firstly confirmed to be opened, the ignition lock is in an ON gear state, and otherwise, the subsequent steps are not executed.
10. The method for rapidly correcting the vehicle speed and mileage of the commercial vehicle instrument developed based on the diagnostic instrument as claimed in claim 1, wherein the authentication comprises the following steps: the PC terminal generates a random code according to a user instruction, the user sends the random code to the server, the server generates an activation code according to the random code and feeds the activation code back to the user, the user inputs the activation code into the PC terminal, the PC terminal calculates the results of the activation code and the authorization code, and subsequent steps can be carried out only if the activation code and the authorization code completely conform to each other.
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| CN201911206664.2A CN111006692A (en) | 2019-11-29 | 2019-11-29 | Method for rapidly correcting vehicle speed and mileage of commercial vehicle instrument based on development of diagnostic instrument |
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| CN201911206664.2A CN111006692A (en) | 2019-11-29 | 2019-11-29 | Method for rapidly correcting vehicle speed and mileage of commercial vehicle instrument based on development of diagnostic instrument |
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| CN113267201A (en) * | 2021-06-24 | 2021-08-17 | 东风华神汽车有限公司 | Vehicle mileage correction method, device, equipment and readable storage medium |
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