CN107767661B - Real-time tracking system for vehicle - Google Patents
Real-time tracking system for vehicle Download PDFInfo
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- CN107767661B CN107767661B CN201711218996.3A CN201711218996A CN107767661B CN 107767661 B CN107767661 B CN 107767661B CN 201711218996 A CN201711218996 A CN 201711218996A CN 107767661 B CN107767661 B CN 107767661B
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/20—Monitoring the location of vehicles belonging to a group, e.g. fleet of vehicles, countable or determined number of vehicles
- G08G1/205—Indicating the location of the monitored vehicles as destination, e.g. accidents, stolen, rental
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/123—Traffic control systems for road vehicles indicating the position of vehicles, e.g. scheduled vehicles; Managing passenger vehicles circulating according to a fixed timetable, e.g. buses, trains, trams
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Abstract
The invention discloses a real-time tracking system for vehicles, comprising: the vehicle-mounted host is used for determining and recording the identity information and the position information of the vehicle and uploading the identity information and the position information of the vehicle to the server through a mobile communication network and/or the global Internet; the server is used for storing the identity information, the position information and the track information of the vehicle; the client is used for reading the identity information, the position information and the track information of the vehicle from the server and performing static or dynamic display; the vehicle-mounted host determines the identity information and the position information of the vehicle through the Beidou satellite navigation system and the vehicle running information, uploads the identity information and the position information of the vehicle to the server through the mobile communication network and/or the global Internet, the server receives and stores the data, and the client accesses the server through the global Internet to extract the position information of the specific vehicle and the running track information of the vehicle. The system provided by the invention can more reliably position the vehicle.
Description
Technical Field
The invention relates to the field of vehicle management, in particular to a real-time vehicle tracking system.
Background
Taxi companies, police offices and the like need to position the position of the governed vehicle, so that the vehicle can be conveniently and reasonably dispatched, and the position and the speed of each vehicle group and the vehicle can be conveniently displayed on an electronic map of a monitoring center. Vehicle resources can be more fully utilized through reasonable scheduling. For individuals, it is desirable to be able to view the location of the vehicle in real time after lending the vehicle, and to protect the vehicle from abuse and even theft.
The existing vehicle real-time tracking system is used for positioning vehicles through a GPS and a Beidou satellite navigation system, and positioning results are prone to interference of weather, high buildings and the like, so that positioning is inaccurate and the positioning results are unreliable.
Disclosure of Invention
To solve the above problems, the present invention provides a vehicle real-time tracking system.
The invention provides a real-time tracking system for a vehicle, which comprises:
the vehicle-mounted host is used for determining and recording the identity information and the position information of the vehicle and uploading the identity information and the position information of the vehicle to the server through a mobile communication network and/or the global Internet;
the server is used for storing the identity information, the position information and the track information of the vehicle;
the client is used for reading the identity information, the position information and the track information of the vehicle from the server and performing static or dynamic display; the position information of the specific vehicle and the traveling track information of the vehicle are extracted through the global Internet access server.
In one embodiment, the vehicle-mounted host is further used for determining the position information of the vehicle through a Beidou satellite navigation system and the running information of the vehicle; the vehicle running information comprises a vehicle speed and a vehicle running direction, and when a Beidou satellite navigation system signal is stronger than a preset value, the position information of the vehicle is obtained through the Beidou satellite navigation system; when big dipper satellite navigation system signal equals or is less than when the default, the positional information of vehicle is obtained after the speed vector to the vehicle carries out the integral according to the time, its size of speed vector is the speed of a motor vehicle that contains in the vehicle operation information, and its direction is the vehicle direction of travel that contains in the vehicle operation information, the speed of a motor vehicle is gathered through the OBD interface by on-vehicle host computer and is obtained, the vehicle direction of travel is obtained after the integral is carried out according to the time by the vehicle steering angle that on-vehicle host computer gathered through the OBD interface.
In one embodiment, the vehicle-mounted host is further used for reading speed information and fault information of the vehicle and uploading the speed information and the fault information to the server;
the server is also used for storing the speed information and the fault information of the vehicle.
In one embodiment, the server is further configured to send alarm information to the client according to a preset alarm condition, where the preset alarm condition includes one or more of a location range condition, a speed range condition, and a fault condition; the position range condition is triggered when the position of the vehicle is outside a user-set range, the speed range condition is triggered when the speed of the vehicle is in an overspeed state or outside a user-set speed range, and the fault condition is triggered when the vehicle has a user-set fault.
In one embodiment, the system further comprises:
the cab monitoring module is arranged in a cab of a vehicle and comprises a camera, a sound pick-up, a loudspeaker and communication equipment, and is used for monitoring the cab and communicating with a driver to realize monitoring, scheduling and management of the driver.
In one embodiment, the server is further configured to compress the stored location information and speed information, and the compression method is as follows:
the server reads the stored position and speed information of the vehicle corresponding to the preset time at intervals of preset time, and the position and speed information is used as second data to be compressed;
the server reads the position and speed information of the vehicle corresponding to the last section of fitting after the last compression as first data to be compressed;
the server combines the second data to be compressed and the first data to be compressed according to a time sequence to form data to be compressed;
the server carries out piecewise linear fitting on the data to be compressed, wherein the piecewise linear fitting conditions are as follows: in each linear fitting range, the position error of the vehicle is lower than a preset maximum position error, and the speed error of the vehicle is lower than a preset maximum speed error;
the server keeps the result of the piecewise linear fitting and the position and speed information of the vehicle corresponding to the last segment of fitting in the piecewise fitting;
and deleting the position and speed information of the vehicle corresponding to all the other sections except the last section by the server in a fitting manner, and completing the compression within the preset time.
In one embodiment, the in-vehicle host further performs positioning according to a mobile communication network.
In one embodiment, the vehicle-mounted host is further configured to perform data fusion on the positioning result determined by the Beidou satellite navigation system, the positioning result determined by the vehicle operation information and the positioning result determined by the mobile communication network, and the fusion method is to perform data fusion by using Kalman filtering, wherein when the signal intensity of the Beidou satellite navigation system is lower than a preset threshold, only the positioning result determined by the vehicle operation information and the positioning result determined by the mobile communication network are subjected to data fusion.
In one embodiment, the preset maximum position error is a numerical value, the numerical value being not less than 1.25 meters;
the preset maximum speed error is a proportional value, and the proportional value is less than 10%.
In one embodiment, the vehicle-mounted host is further configured to obtain position information of the vehicle through a vehicle-mounted navigator, and an application program of the beidou satellite navigation system is embedded in the vehicle-mounted navigator;
when the current navigation path of the vehicle-mounted navigator is an expressway, the vehicle-mounted host monitors a display picture of the vehicle-mounted navigator in real time;
when the display picture is judged to be dead and the duration of the dead is equal to the preset dead time, acquiring the current temperature of the vehicle-mounted navigator;
when the current temperature is higher than a first preset temperature value, acquiring the last position of the vehicle displayed in the last display picture, acquiring the distance between the last position and the next highway toll station on the current navigation path, and acquiring the average running speed of the vehicle in a preset time period before the current time;
calculating an estimated running time required for the vehicle to spend from the last position to the next highway toll station according to the distance and the average running speed;
when the estimated running time is equal to or longer than the first cooling time, controlling the vehicle-mounted navigator to close the first cooling time and then starting the vehicle-mounted navigator; the first cooling time length is estimated to be the time length required by the vehicle-mounted navigator to reduce the current temperature to a second preset temperature value;
when the estimated running time is shorter than the first cooling time, controlling the vehicle-mounted navigator to close a second cooling time and then starting the vehicle-mounted navigator, wherein the second cooling time is longer than the first cooling time;
after the vehicle-mounted navigator is closed, sending an auxiliary positioning request to a server; after receiving the auxiliary positioning request, the server acquires the license plate number and the identification time identified by the server from the license plate identification device of the next expressway toll station; wherein, when the license plate number and the recognition time of the vehicle are acquired from the next highway toll station within a preset acquisition duration, the server stores the recognition time as the time for the vehicle to pass through the next highway toll station; when the license plate number and the identification time of the vehicle are not acquired from the next highway toll station within the preset acquisition duration, the server sends a starting instruction to the vehicle-mounted host, and the vehicle-mounted host is further used for not allowing the vehicle-mounted navigator to be closed but controlling the vehicle-mounted navigator to be started when receiving the starting instruction; wherein the preset acquisition time period is greater than or equal to the first cooling time period and less than the second cooling time period.
Some of the benefits of the present invention may include:
the vehicle real-time tracking system provided by the invention can more reliably position the vehicle and is convenient for real-time monitoring of the vehicle.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a real-time vehicle tracking system according to an embodiment of the invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
FIG. 1 is a schematic diagram of a real-time vehicle tracking system according to an embodiment of the invention. As shown in fig. 1, the present invention provides a real-time tracking system for a vehicle, comprising:
the vehicle-mounted host is used for determining and recording identity information and position information of the vehicle and uploading the identity information and the position information of the vehicle to the server through a mobile communication network and/or a global internet, wherein the determined position information of the vehicle is determined by the vehicle-mounted host through a Beidou satellite navigation system and running information of the vehicle, the running information of the vehicle comprises a vehicle speed and a vehicle running direction, and when a signal of the Beidou satellite navigation system is stronger than a preset value, the position information of the vehicle is obtained through the Beidou satellite navigation system; when the Beidou satellite navigation system signal is equal to or weaker than the preset value, the position information of the vehicle is obtained by integrating the speed vector of the vehicle according to time, the size of the speed vector is the vehicle speed contained in the vehicle running information, the direction of the speed vector is the vehicle running direction contained in the vehicle running information, the vehicle speed is acquired by the vehicle-mounted host through the OBD interface, and the vehicle running direction is obtained by integrating the vehicle steering angle acquired by the vehicle-mounted host through the OBD interface according to time;
the server is used for storing the identity information, the position information and the track information of the vehicle;
the client is used for reading the identity information, the position information and the track information of the vehicle from the server and performing static or dynamic display;
the vehicle-mounted host determines the identity information and the position information of the vehicle through the Beidou satellite navigation system and the vehicle running information, uploads the identity information and the position information of the vehicle to the server through the mobile communication network and/or the global Internet, the server receives and stores the data, and the client accesses the server through the global Internet to extract the position information of the specific vehicle and the running track information of the vehicle.
Through the position information who confirms the vehicle that uses vehicle operation information, can be in time confirm the position information when big dipper satellite navigation system signal is not good, keep the continuity of tracking the vehicle, can fix a position the vehicle more reliably, realize the real-time tracking to the vehicle.
In order to more accurately track the operating data of the vehicle and provide analytical data for real-time alarming of the vehicle, in one embodiment of the invention,
the vehicle-mounted host is also used for reading the speed information and the fault information of the vehicle and transmitting the speed information and the fault information to the server;
the server is also used for storing the speed information and the fault information of the vehicle.
In order to alarm a manager or a vehicle owner in time and avoid the loss of flow and electric quantity caused by the fact that a client needs to be continuously connected with a server, alarm management is implemented by the server, in one embodiment of the invention, the server is further used for sending alarm information to the client according to preset alarm conditions, and the preset alarm conditions comprise one or more of position range conditions, speed range conditions and fault conditions; the position range condition is triggered when the position of the vehicle is outside a user-set range, the speed range condition is triggered when the speed of the vehicle is in an overspeed state or outside a user-set speed range, and the fault condition is triggered when the vehicle has a user-set fault.
In order to realize the monitoring and real-time scheduling of the vehicle driver, in an embodiment of the present invention, the vehicle real-time tracking system further includes:
the cab monitoring module is arranged in a cab of a vehicle and comprises a camera, a sound pick-up, a loudspeaker and communication equipment, and is used for monitoring the cab and communicating with a driver to realize monitoring, scheduling and management of the driver. The vehicle owner or the dispatching center is directly connected with the communication equipment in the cab monitoring module or is connected with the communication equipment in the cab monitoring module through the server, the cab is monitored by acquiring image and sound information collected by the camera and the sound pickup through the communication equipment, and the voice information is sent to the loudspeaker through the communication equipment, so that the communication with a driver is realized.
In order to save storage space and data transmission amount and realize long-term storage of a large amount of vehicle data, the data is compressed at a server side and is recovered by a client side after being transmitted to the client side, and the data amount can be reduced in a fitting mode. In an embodiment of the present invention, the server is further configured to compress the stored location information and speed information, where the compression method is:
the server reads the stored position and speed information of the vehicle corresponding to the preset time at intervals of preset time, and the position and speed information is used as second data to be compressed;
the server reads the position and speed information of the vehicle corresponding to the last section of fitting after the last compression as first data to be compressed;
the server combines the second data to be compressed and the first data to be compressed according to a time sequence to form data to be compressed, namely the first data to be compressed is placed in front of the second data to be compressed and is directly connected with the second data to be compressed to form data to be compressed which is longer in time;
the server performs piecewise linear fitting on the data to be compressed, and the piecewise linear fitting can be performed only under the condition of the number of segments or the error condition, but in the invention, the change condition of vehicle driving cannot be known in advance, so that the number of segments required to be divided for performing linear fitting cannot be determined to be more appropriate, and the error condition is required to be used for determining the result of the linear fitting. The condition of the piecewise linear fitting is as follows: in each linear fitting range in the piecewise linear fitting, the position error of the vehicle is lower than a preset maximum position error, and the speed error of the vehicle is lower than a preset maximum speed error;
the server keeps the result of the piecewise linear fitting and the position and speed information of the vehicle corresponding to the last segment of fitting in the piecewise fitting;
and deleting the position and speed information of the vehicle corresponding to all the other sections except the last section by the server in a fitting manner, and completing the compression within the preset time.
In order to perform more accurate positioning without increasing hardware cost, in one embodiment of the invention, the vehicle-mounted host also performs positioning according to a mobile communication network.
In order to perform more accurate positioning and simultaneously eliminate the influence of the Beidou satellite navigation system signal when the Beidou satellite navigation system signal is not good, the vehicle-mounted host is also used for performing data fusion on a positioning result determined by the Beidou satellite navigation system, a positioning result determined by vehicle operation information and a positioning result determined by a mobile communication network, and the fusion method is to perform data fusion by using Kalman filtering, wherein when the strength of the Beidou satellite navigation system signal is lower than a preset threshold value, only the positioning result determined by the vehicle operation information and the positioning result determined by the mobile communication network are subjected to data fusion.
Since the error of the location information is large, in order to improve the compression rate without affecting the position judgment, and since the width of the lane of a general road is 3.5 m, in one embodiment of the present invention,
the preset maximum position error is a numerical value which is not less than 1.75 meters;
since the error in the speed information is small and the penalties for over-speeding, etc. are all performed as a majority of the percentage, and over-speeding of 10% is subject to substantial penalties, in order not to affect the reliability of the vehicle speed tracking, in one embodiment of the invention,
the preset maximum speed error is a proportional value, and the proportional value is less than 10%.
The vehicle real-time tracking system provided by the invention can more reliably position the vehicle and is convenient for real-time monitoring of the vehicle.
In one embodiment, a vehicle-mounted navigator is generally installed in a vehicle, an application program of the Beidou satellite navigation system and signal transceiving equipment required by vehicle-mounted navigation are embedded in the vehicle-mounted navigator, generally, when the vehicle-mounted navigator is used for a long time and the temperature of the environment where the vehicle is located is high, the temperature of the vehicle-mounted navigator can become higher, at this time, the vehicle-mounted navigator may crash due to the limitation of equipment hardware, under the condition of crash, the Beidou satellite navigation system cannot accurately position the vehicle, for some special vehicles such as police cars, bank escort cars and the like, the required positioning accuracy is very high, and the place to which the vehicle runs at what time must be known; at this time, the vehicle real-time tracking system provided by the embodiment of the invention further comprises the following scheme:
the vehicle-mounted host is also used for acquiring the position information of the vehicle through a vehicle-mounted navigator, an application program of the Beidou satellite navigation system is embedded in the vehicle-mounted navigator, and the vehicle-mounted navigator is in a navigation function starting state;
when the current navigation path of the vehicle-mounted navigator is an expressway, the vehicle-mounted host monitors a display picture of the vehicle-mounted navigator in real time;
when the display picture is judged to be dead and the duration of the dead is equal to the preset dead time, acquiring the current temperature of the vehicle-mounted navigator;
when the current temperature is higher than a first preset temperature value, acquiring the last position of the vehicle displayed in the last display picture, acquiring the distance between the last position and the next highway toll station on the current navigation path, and acquiring the average running speed of the vehicle in a preset time period before the current time; the preset time period is a time period during which the vehicle travels on the expressway, and does not include a time period during which the vehicle travels on a road other than the expressway;
calculating an estimated running time required for the vehicle to spend from the last position to the next highway toll station according to the distance and the average running speed;
when the estimated running time is equal to or longer than the first cooling time, controlling the vehicle-mounted navigator to close the first cooling time and then starting the vehicle-mounted navigator to enter a navigation state; the first cooling time length is estimated to be the time length required for the vehicle-mounted navigator to be reduced from the current temperature to a second preset temperature value (a preset temperature at which the vehicle-mounted navigator can normally work and is not dead); therefore, the vehicle-mounted navigator can be automatically started when the temperature is restored to be proper, and the vehicle-mounted navigator can enter a navigation state in time.
When the estimated running time is shorter than the first cooling time, controlling the vehicle-mounted navigator to close a second cooling time and then starting the vehicle-mounted navigator, wherein the second cooling time is longer than the first cooling time, and when the second cooling time is not too long, the second cooling time can be longer than the first cooling time, for example, 1 minute, 2 minutes and the like;
after the vehicle-mounted navigator is closed, sending an auxiliary positioning request to a server; after receiving the auxiliary positioning request, the server acquires the license plate number and the identification time identified by the server from the license plate identification device of the next expressway toll station; when the license plate number and the identification time of the vehicle are acquired from the next highway toll station within the preset acquisition duration, the server stores the identification time as the time when the vehicle passes through the next highway toll station, so that the vehicle can still be accurately positioned under the condition that the vehicle-mounted navigator is halted, and the time when the vehicle runs to the place can be known; wherein the preset acquisition time period is greater than or equal to the first cooling time period and less than the second cooling time period. Namely, when the estimated running time is shorter than the first cooling time, in the cooling process of the vehicle-mounted navigator, the expressway toll station assists to obtain the time and the position of the vehicle on the road, the dead zone cannot be positioned, the cooling time can be kept for a long time, the vehicle-mounted navigator can be cooled to a lower temperature, and the vehicle-mounted navigator can better work after being restarted.
When the server does not acquire the license plate number and the identification time of the vehicle from the next highway toll station within the preset acquisition duration, the server sends a starting instruction to the vehicle-mounted host, and the vehicle-mounted host is further used for controlling the vehicle-mounted navigator to start and enter a navigation state instead of allowing the vehicle-mounted navigator to be closed when receiving the starting instruction; that is, if the server does not acquire the license plate number and the recognition time of the vehicle from the next highway toll station within the specified time, it indicates that the vehicle may be in a situation, and in order to avoid an excessively long positioning blind area, the vehicle-mounted navigator can be immediately started to enter the navigation state.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. A real-time tracking system for a vehicle, comprising:
the vehicle-mounted host is used for determining and recording the identity information and the position information of the vehicle and uploading the identity information and the position information of the vehicle to the server through a mobile communication network and/or the global Internet;
the server is used for storing the identity information, the position information and the track information of the vehicle;
the client is used for reading the identity information, the position information and the track information of the vehicle from the server and performing static or dynamic display; extracting position information and track information of a specific vehicle through a global Internet access server;
the vehicle-mounted host is also used for acquiring the position information of the vehicle through a vehicle-mounted navigator, and an application program of a Beidou satellite navigation system is embedded in the vehicle-mounted navigator;
when the current navigation path of the vehicle-mounted navigator is an expressway, the vehicle-mounted host monitors a display picture of the vehicle-mounted navigator in real time;
when the display picture is judged to be dead and the duration of the dead is equal to the preset dead time, acquiring the current temperature of the vehicle-mounted navigator;
when the current temperature is higher than a first preset temperature value, acquiring the last position of the vehicle displayed in the last display picture, acquiring the distance between the last position and the next highway toll station on the current navigation path, and acquiring the average running speed of the vehicle in a preset time period before the current time;
calculating an estimated running time required for the vehicle to spend from the last position to the next highway toll station according to the distance and the average running speed;
when the estimated running time is equal to or longer than the first cooling time, controlling the vehicle-mounted navigator to close the first cooling time and then starting the vehicle-mounted navigator; the first cooling time length is estimated to be the time length required by the vehicle-mounted navigator to reduce the current temperature to a second preset temperature value;
when the estimated running time is shorter than the first cooling time, controlling the vehicle-mounted navigator to close a second cooling time and then starting the vehicle-mounted navigator, wherein the second cooling time is longer than the first cooling time;
after the vehicle-mounted navigator is closed, sending an auxiliary positioning request to a server; after receiving the auxiliary positioning request, the server acquires the license plate number and the identification time identified by the server from the license plate identification device of the next expressway toll station; wherein, when the license plate number and the recognition time of the vehicle are acquired from the next highway toll station within a preset acquisition duration, the server stores the recognition time as the time for the vehicle to pass through the next highway toll station; when the license plate number and the identification time of the vehicle are not acquired from the next highway toll station within the preset acquisition duration, the server sends a starting instruction to the vehicle-mounted host, and the vehicle-mounted host is further used for not allowing the vehicle-mounted navigator to be closed but controlling the vehicle-mounted navigator to be started when receiving the starting instruction; wherein the preset acquisition time period is greater than or equal to the first cooling time period and less than the second cooling time period.
2. The system of claim 1,
the vehicle-mounted host is also used for determining the position information of the vehicle through the Beidou satellite navigation system and the running information of the vehicle; the vehicle running information comprises a vehicle speed and a vehicle running direction, and when a Beidou satellite navigation system signal is stronger than a preset value, the position information of the vehicle is obtained through the Beidou satellite navigation system; when big dipper satellite navigation system signal equals or is less than when the default, the positional information of vehicle is obtained after the speed vector to the vehicle carries out the integral according to the time, its size of speed vector is the speed of a motor vehicle that contains in the vehicle operation information, and its direction is the vehicle direction of travel that contains in the vehicle operation information, the speed of a motor vehicle is gathered through the OBD interface by on-vehicle host computer and is obtained, the vehicle direction of travel is obtained after the integral is carried out according to the time by the vehicle steering angle that on-vehicle host computer gathered through the OBD interface.
3. The system of claim 1,
the vehicle-mounted host is also used for reading the speed information and the fault information of the vehicle and transmitting the speed information and the fault information to the server;
the server is also used for storing the speed information and the fault information of the vehicle.
4. The system of claim 3,
the server is further used for sending alarm information to the client according to preset alarm conditions, wherein the preset alarm conditions comprise one or more of position range conditions, speed range conditions and fault conditions; the position range condition is triggered when the position of the vehicle is outside a user-set range, the speed range condition is triggered when the speed of the vehicle is in an overspeed state or outside a user-set speed range, and the fault condition is triggered when the vehicle has a user-set fault.
5. The system of claim 4, further comprising:
the cab monitoring module is arranged in a cab of a vehicle and comprises a camera, a sound pick-up, a loudspeaker and communication equipment, and is used for monitoring the cab and communicating with a driver to realize monitoring, scheduling and management of the driver.
6. The system of claim 3, wherein the server is further configured to compress the stored location information and velocity information by:
the server reads the stored position and speed information of the vehicle corresponding to the preset time at intervals of preset time, and the position and speed information is used as second data to be compressed;
the server reads the position and speed information of the vehicle corresponding to the last section of fitting after the last compression as first data to be compressed;
the server combines the second data to be compressed and the first data to be compressed according to a time sequence to form data to be compressed;
the server carries out piecewise linear fitting on the data to be compressed, wherein the piecewise linear fitting conditions are as follows: in each linear fitting range, the position error of the vehicle is lower than a preset maximum position error, and the speed error of the vehicle is lower than a preset maximum speed error;
the server keeps the result of the piecewise linear fitting and the position and speed information of the vehicle corresponding to the last segment of fitting in the piecewise fitting;
and deleting the position and speed information of the vehicle corresponding to all the other sections except the last section by the server in a fitting manner, and completing the compression within the preset time.
7. The system of claim 2,
and the vehicle-mounted host computer is also positioned according to the mobile communication network.
8. The system of claim 1 or 6, wherein the on-board host is further configured to perform data fusion on the positioning result determined by the Beidou satellite navigation system, the positioning result determined by the vehicle operation information, and the positioning result determined by the mobile communication network, and the fusion method is to perform data fusion by using Kalman filtering, wherein when the Beidou satellite navigation system signal strength is lower than a preset threshold, only the positioning result determined by the vehicle operation information and the positioning result determined by the mobile communication network are subjected to data fusion.
9. The system of claim 6,
the preset maximum position error is a numerical value, and the numerical value is not less than 1.25 m;
the preset maximum speed error is a proportional value, and the proportional value is less than 10%.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2017111847284 | 2017-11-23 | ||
| CN201711184728 | 2017-11-23 |
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| Publication Number | Publication Date |
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| CN107767661A CN107767661A (en) | 2018-03-06 |
| CN107767661B true CN107767661B (en) | 2020-04-17 |
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| CN201711218996.3A Active CN107767661B (en) | 2017-11-23 | 2017-11-28 | Real-time tracking system for vehicle |
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| CN108830969B (en) * | 2018-04-27 | 2021-01-08 | 榛硕（武汉）智能科技有限公司 | Unmanned vehicle event monitoring system and method |
| CN109547564B (en) * | 2018-12-18 | 2021-08-03 | 北京百度网讯科技有限公司 | Remote data acquisition method, device, equipment and computer readable storage medium |
| CN112305499B (en) * | 2019-08-02 | 2024-06-21 | 华为云计算技术有限公司 | Method and device for positioning according to light source |
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| CN112677904A (en) * | 2020-12-31 | 2021-04-20 | 车主邦（北京）科技有限公司 | Vehicle information management method and device |
| CN113467426A (en) * | 2021-07-08 | 2021-10-01 | 广东电网有限责任公司广州供电局 | Vehicle life-cycle tracking management system |
| CN114867000B (en) * | 2022-04-25 | 2024-03-29 | 惠州华阳通用电子有限公司 | Emergency rescue information transmission method and device |
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