CN111260809B - Distance measuring and calculating method and system for vehicle-mounted unit and vehicle-mounted unit - Google Patents
Distance measuring and calculating method and system for vehicle-mounted unit and vehicle-mounted unit Download PDFInfo
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- CN111260809B CN111260809B CN202010072088.3A CN202010072088A CN111260809B CN 111260809 B CN111260809 B CN 111260809B CN 202010072088 A CN202010072088 A CN 202010072088A CN 111260809 B CN111260809 B CN 111260809B
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
- G07B15/00—Arrangements or apparatus for collecting fares, tolls or entrance fees at one or more control points
- G07B15/06—Arrangements for road pricing or congestion charging of vehicles or vehicle users, e.g. automatic toll systems
- G07B15/063—Arrangements for road pricing or congestion charging of vehicles or vehicle users, e.g. automatic toll systems using wireless information transmission between the vehicle and a fixed station
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C5/00—Registering or indicating the working of vehicles
- G07C5/008—Registering or indicating the working of vehicles communicating information to a remotely located station
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C5/00—Registering or indicating the working of vehicles
- G07C5/08—Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
- G07C5/0841—Registering performance data
Abstract
The invention provides a method, a system and a device for measuring and calculating the distance of a vehicle-mounted unit, wherein the method comprises the following steps: the first controlled detection device sends a distance calculation instruction to the vehicle-mounted unit; the vehicle-mounted unit acquires a driving speed parameter by using the speed measurement sensing device, calculates a first distance between the current position of the vehicle-mounted unit and the first controlled detection device according to the driving speed parameter, and takes the first distance as a real-time distance of the vehicle-mounted unit; the second controlled detection device sends a distance return instruction to the vehicle-mounted unit; the vehicle-mounted unit sends the real-time distance of the vehicle-mounted unit to a second controlled detection device; and the second controlled detection device judges whether the difference value between the real-time distance and the first controlled detection distance is larger than a first preset value, and if so, the real-time distance is used as the distance according to the travel charging. Therefore, the payment amount of the vehicle can be calculated according to the real-time distance of the vehicle, and the problem that the ETC system is economically damaged due to the fact that lawless persons evade fees by tampering the high-speed entrance information recorded by the vehicle-mounted unit is effectively avoided.
Description
Technical Field
The invention relates to the technical field of electronics, in particular to a method and a system for measuring and calculating the distance of a vehicle-mounted unit and the vehicle-mounted unit.
Background
An ETC (Electronic Toll Collection) system performs wireless communication and information exchange between an on-vehicle device mounted on a vehicle and an antenna mounted on a Toll gate lane. The system mainly comprises an automatic vehicle identification system, a central management system, other auxiliary facilities and the like. The automatic vehicle identification system includes an on-board unit (OBU), also called a Transponder (Transponder) or an electronic Tag (Tag), a roadside unit (RSU), and the like. The OBU stores identification information of the vehicle and is typically mounted on a windshield in front of the vehicle, and the RSU is mounted near a toll booth.
In practical application of the ETC system, when the RSU finishes charging operation, the driving distance and the payment amount are calculated according to the high-speed entrance information and the high-speed exit information. When the high-speed entrance information of the OBU is illegally tampered, the running distance calculated by the RSU is smaller than the actual distance, so that the payment amount calculated by the RSU is smaller than the receivable amount, and the economic loss of the ETC system is caused.
Disclosure of Invention
The present invention is directed to solving one of the problems set forth above.
The invention mainly aims to provide a distance measuring and calculating method of a vehicle-mounted unit.
Another object of the present invention is to provide a system for distance measurement.
It is another object of the present invention to provide an on-board unit.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the invention provides a distance measuring and calculating method of a vehicle-mounted unit, which comprises the following steps:
the method comprises the steps that a first controlled detection device detects that a vehicle-mounted unit enters a communication range of the vehicle-mounted unit, and sends a distance calculation instruction to the vehicle-mounted unit, wherein the first controlled detection device is a controlled detection device at a high-speed entrance;
the vehicle-mounted unit receives a distance calculation instruction sent by the first controlled detection device, a speed measurement sensing device of the vehicle-mounted unit is used for continuously acquiring a driving speed parameter, a first distance between the current position of the vehicle-mounted unit and the first controlled detection device is continuously calculated according to the driving speed parameter, and the first distance is used as a real-time distance of the vehicle-mounted unit;
a second controlled detection device detects that the vehicle-mounted unit enters a communication range of the vehicle-mounted unit, and sends a distance return instruction to the vehicle-mounted unit, wherein the second controlled detection device is a controlled detection device at a high-speed outlet;
after receiving the distance return instruction sent by the second controlled detection device, the vehicle-mounted unit sends the real-time distance of the vehicle-mounted unit to the second controlled detection device;
and the second controlled detection device receives the real-time distance, judges whether the difference value between the real-time distance and the first controlled detection distance is larger than a preset value, and if so, takes the real-time distance as the distance according to which the trip charging is carried out, wherein the first controlled detection distance is the standard measurement distance between the second controlled detection device and the first controlled detection device.
Optionally, after the taking the first distance as the real-time distance of the on-board unit, before the second controlled detection device detects that the on-board unit enters the communication range thereof, the method further includes:
the third controlled detection device detects that the vehicle-mounted unit enters the communication range of the vehicle-mounted unit, and sends the distance return instruction to the vehicle-mounted unit, wherein the third controlled detection device is other controlled detection devices except the first controlled detection device and the second controlled detection device in a high-speed toll station;
after receiving the distance return instruction sent by the third controlled detection device, the vehicle-mounted unit sends the real-time distance of the vehicle-mounted unit to the third controlled detection device;
the third controlled detection device receives the real-time distance and judges whether the difference value between the real-time distance and the second controlled detection distance is larger than the preset value, if so, the third controlled detection device returns calibration information to the vehicle-mounted unit, and the calibration information comprises the second controlled detection distance; if not, and the difference value between the real-time distance and the second controlled detection distance is larger than a distance error tolerance value, the third controlled detection device returns calibration information to the vehicle-mounted unit, wherein the calibration information comprises the second controlled detection distance, and the second controlled detection distance is a standard measurement distance between the third controlled detection device and the first controlled detection device;
and the vehicle-mounted unit receives the calibration information, continuously acquires the driving speed parameter by using a speed measurement sensing device of the vehicle-mounted unit, continuously calculates a second distance between the current position of the vehicle-mounted unit and the third controlled detection device according to the driving speed parameter, and takes the sum of the second distance and the second controlled detection distance as the real-time distance of the vehicle-mounted unit.
Optionally, the driving speed parameters include: current acceleration and clock parameters.
Optionally, the method further includes:
and the calibration controlled detection device calibrates the acceleration sensing deviation of the test sensing device of the on-board unit and calibrates the clock deviation of the on-board unit, wherein the calibration controlled detection device is one or more of the first controlled detection device, the second controlled detection device and the third controlled detection device.
In another aspect, the present invention provides a method for measuring and calculating a distance of a vehicle-mounted unit, including:
the vehicle-mounted unit receives a distance calculation instruction sent by the first controlled detection device, a speed measurement sensing device of the vehicle-mounted unit is used for continuously acquiring a driving speed parameter, a first distance between the current position of the vehicle-mounted unit and the first controlled detection device is continuously calculated according to the driving speed parameter, and the first distance is used as a real-time distance of the vehicle-mounted unit, wherein the first controlled detection device is a controlled detection device at a high-speed entrance;
the vehicle-mounted unit receives a distance return instruction sent by a third controlled detection device and sends the real-time distance of the vehicle-mounted unit to the third controlled detection device;
the vehicle-mounted unit receives calibration information sent by a third controlled detection device, wherein the calibration information is sent by the third controlled detection device after judging that the difference value between the real-time distance and a second controlled detection distance is smaller than or equal to a preset value and larger than a distance error tolerance value, the calibration information comprises the second controlled detection distance, and the second controlled detection distance is a standard measurement distance between the third controlled detection device and the first controlled detection device;
after the vehicle-mounted unit receives the calibration information, the vehicle-mounted unit continuously acquires the driving speed parameter by using a speed measurement sensing device of the vehicle-mounted unit, continuously calculates a second distance between the current position of the vehicle-mounted unit and the third controlled detection device according to the driving speed parameter, and takes the sum of the second distance and the second controlled detection distance as the real-time distance of the vehicle-mounted unit;
and after receiving the distance return instruction sent by a second controlled detection device, the vehicle-mounted unit sends the real-time distance of the vehicle-mounted unit to the second controlled detection device, wherein the second controlled detection device is a controlled detection device at a high-speed outlet.
Another aspect of the present invention provides a distance measuring system, including:
the first controlled detection device is used for detecting that the vehicle-mounted unit enters a communication range of the vehicle-mounted unit and sending a distance calculation instruction to the vehicle-mounted unit, wherein the first controlled detection device is a controlled detection device at a high-speed entrance;
the vehicle-mounted unit is used for receiving a distance calculation instruction sent by the first controlled detection device, continuously acquiring a driving speed parameter by using a speed measurement sensing device of the vehicle-mounted unit, continuously calculating a first distance between the current position of the vehicle-mounted unit and the first controlled detection device according to the driving speed parameter, and taking the first distance as a real-time distance of the vehicle-mounted unit;
the second controlled detection device is used for detecting that the vehicle-mounted unit enters the communication range of the vehicle-mounted unit and sending a distance return instruction to the vehicle-mounted unit, and the second controlled detection device is a controlled detection device at a high-speed outlet;
the vehicle-mounted unit is further used for sending the real-time distance of the vehicle-mounted unit to the second controlled detection device after receiving the distance return instruction sent by the second controlled detection device;
the second controlled detection device is further configured to receive the real-time distance, determine whether a difference between the real-time distance and a first controlled detection distance is greater than a preset value, and if so, use the real-time distance as a distance according to which the trip charging is performed, where the first controlled detection distance is a standard measurement distance between the second controlled detection device and the first controlled detection device.
Optionally, the system further comprises a third controlled detection device, wherein:
the third controlled detection device is used for detecting that the vehicle-mounted unit enters the communication range of the vehicle-mounted unit and sending the distance return instruction to the vehicle-mounted unit, and the third controlled detection device is other controlled detection devices except the first controlled detection device and the second controlled detection device in a high-speed toll station;
the vehicle-mounted unit is further used for sending the real-time distance of the vehicle-mounted unit to the third controlled detection device after receiving the distance return instruction sent by the third controlled detection device;
the third controlled detection device is further configured to receive the real-time distance, and determine whether a difference between the real-time distance and a second controlled detection distance is greater than the preset value, if not, and if the difference between the real-time distance and the second controlled detection distance is greater than a distance tolerance value, the third controlled detection device returns calibration information to the vehicle-mounted unit, where the calibration information includes the second controlled detection distance, and the second controlled detection distance is a standard measurement distance between the third controlled detection device and the first controlled detection device;
and the vehicle-mounted unit is further used for receiving the calibration information, continuously acquiring the driving speed parameter by using a speed measurement sensing device of the vehicle-mounted unit, continuously calculating a second distance between the current position of the vehicle-mounted unit and the third controlled detection device according to the driving speed parameter, and taking the sum of the second distance and the second controlled detection distance as the real-time distance of the vehicle-mounted unit.
In another aspect of the present invention, an on-board unit includes: the receiving module is used for receiving a distance calculation instruction sent by the first controlled detection device;
the distance measuring and calculating module is used for continuously acquiring a driving speed parameter by using a speed measuring and sensing device of the vehicle-mounted unit, continuously calculating a first distance between the current position of the vehicle-mounted unit and the first controlled detection device according to the driving speed parameter, and taking the first distance as the real-time distance of the vehicle-mounted unit, wherein the first controlled detection device is a controlled detection device at a high-speed entrance;
the receiving module is further used for receiving a distance return instruction sent by a third controlled detection device;
the sending module is used for sending the real-time distance of the vehicle-mounted unit to the third controlled detection device;
the receiving module is further configured to receive calibration information sent by a third controlled detection device, where the calibration information is sent by the third controlled detection device after determining that a difference between the real-time distance and a second controlled detection distance is smaller than or equal to a preset value and larger than a distance error tolerance value, and the calibration information includes the second controlled detection distance, where the second controlled detection distance is a standard measurement distance between the third controlled detection device and the first controlled detection device;
the distance measuring and calculating module is further configured to continuously obtain the driving speed parameter by using a speed measuring and sensing device of the vehicle-mounted unit after receiving the calibration information, continuously calculate a second distance between the current position of the vehicle-mounted unit and the third controlled detection device according to the driving speed parameter, and use the sum of the second distance and the second controlled detection distance as the real-time distance of the vehicle-mounted unit;
the receiving module is further configured to receive the distance return instruction sent by the second controlled detection device;
the sending module is further configured to send the real-time distance of the on-board unit to the second controlled detection device, and the second controlled detection device is a controlled detection device at a high-speed exit.
According to the technical scheme provided by the invention, the invention provides a method and a system for measuring and calculating the distance of a vehicle-mounted unit and the vehicle-mounted unit. The vehicle-mounted unit can measure the actual running distance of the vehicle after the vehicle enters a high speed in real time by using a speed measuring sensing device arranged in the vehicle-mounted unit, and the measured actual running distance is uploaded to the second controlled detection device after the vehicle reaches a high speed exit. Therefore, the ETC system calculates the payment amount according to the real-time distance measured and calculated by the vehicle-mounted unit, and the problem that the ETC system is economically damaged due to fee evasion by lawless persons through tampering with the high-speed entrance information recorded by the vehicle-mounted unit is effectively avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a flowchart of a distance measuring method of a vehicle-mounted unit according to embodiment 1 of the present invention;
fig. 2 is a schematic structural diagram of a distance measuring system according to embodiment 1 of the present invention;
fig. 3 is a schematic structural diagram of another distance measuring system according to embodiment 1 of the present invention;
fig. 4 is a flowchart of a distance measuring method of an on-board unit according to embodiment 2 of the present invention;
fig. 5 is a schematic structural diagram of an on-board unit according to embodiment 2 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or quantity or location.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Example 1
The embodiment provides a distance measuring and calculating method of an on-board unit. Fig. 1 is a flowchart of a distance measuring method of the on-board unit. As shown in fig. 1, the method comprises the steps of:
s101, a first controlled detection device detects that a vehicle-mounted unit enters a communication range of the vehicle-mounted unit, and sends a distance calculation instruction to the vehicle-mounted unit, wherein the first controlled detection device is a controlled detection device at a high-speed entrance;
in this embodiment, the controlled detection devices (including the first controlled detection device and the second controlled detection device and the third controlled detection device hereinafter) may be RSUs, communication devices provided on the gantry, and handheld devices that can communicate with the on-board unit. The controlled detection device can communicate with the vehicle-mounted unit in a 5.8G, Bluetooth, NFC, WIFI and other modes.
S102, the vehicle-mounted unit receives a distance calculation instruction sent by the first controlled detection device, a speed measurement sensing device of the vehicle-mounted unit is used for continuously acquiring a driving speed parameter, a first distance between the current position of the vehicle-mounted unit and the first controlled detection device is continuously calculated according to the driving speed parameter, and the first distance is used as a real-time distance of the vehicle-mounted unit;
as an optional implementation manner in this embodiment, the driving speed parameter includes: current acceleration and clock parameters. In this embodiment, the speed measurement sensing device of the vehicle-mounted unit obtains the current real-time speed by calculating the current acceleration obtained by real-time measurement according to the inertial navigation principle, and obtains the distance between the current position and the initial position of the vehicle-mounted unit by calculating the clock parameter and the real-time speed.
S103, a second controlled detection device detects that the vehicle-mounted unit enters a communication range of the vehicle-mounted unit, and sends a distance return instruction to the vehicle-mounted unit, wherein the second controlled detection device is a controlled detection device at a high-speed outlet;
s104, after receiving a distance return instruction sent by the second controlled detection device, the vehicle-mounted unit sends the real-time distance of the vehicle-mounted unit to the second controlled detection device;
and S105, the second controlled detection device receives the real-time distance, judges whether the difference value between the real-time distance and the first controlled detection distance is larger than a preset value or not, and if so, takes the real-time distance as the distance according to the trip charging, wherein the first controlled detection distance is the standard measurement distance between the second controlled detection device and the first controlled detection device.
In this embodiment, the standard measurement distance is an actual distance between two controlled detection devices measured by the ETC system. The real-time distance is the distance actually traveled by the vehicle measured by the OBU, and the real-time distance cannot be tampered. When the vehicle illegally embezzles the OBU modifies the high-speed entrance information, the position of the first controlled detection device is an illegal high-speed entrance position, and the first controlled detection distance is tampered. In order to overcome the problem, a preset value is introduced in the embodiment, when the difference value between the real-time distance and the first controlled detection distance is larger than the preset value, the first controlled detection distance is judged to be tampered, and the second controlled detection device can use the real-time distance as the distance of the charging basis, so that the wrong amount is not paid due to tampering, and the economic loss of the ETC system is avoided.
The preset value is a basis for detecting whether the high-speed entrance information is tampered, and the preset value can be set to a distance between two adjacent high-speed toll booths or a distance between two or more portal frames, wherein the portal frames are generally arranged on the toll booths or highways.
In this embodiment, the second controlled detection device uses the real-time distance as the distance according to which the trip is charged, and directly sends the distance to the RSU or sends the distance to the RSU through the vehicle-mounted unit (if the second controlled detection device is the RSU, the RSU does not send the distance), and the RSU calculates the payment amount of the trip according to the real-time distance, and sends the payment amount and the real-time distance to the OBU for subsequent charging operation.
In the present embodiment, the vehicle also passes through a plurality of controlled detection devices (hereinafter referred to as third controlled detection devices) before reaching the second controlled detection device, and the distance calculated by the on-board unit can be calibrated. As an optional implementation manner in this embodiment, after taking the first distance as the real-time distance of the vehicle-mounted unit, before the second controlled detection device detects that the vehicle-mounted unit enters the communication range thereof, the method provided by this embodiment further includes: the third controlled detection device detects that the vehicle-mounted unit enters the communication range of the vehicle-mounted unit and sends a distance return instruction to the vehicle-mounted unit, and the third controlled detection device is other controlled detection devices except the first controlled detection device and the second controlled detection device in the high-speed toll station; after receiving the distance return instruction sent by the third controlled detection device, the vehicle-mounted unit sends the real-time distance of the vehicle-mounted unit to the third controlled detection device; the third controlled detection device receives the real-time distance and judges whether the difference value between the real-time distance and the second controlled detection distance is larger than a preset value or not, if so, the third controlled detection device returns calibration information to the vehicle-mounted unit, and the calibration information comprises the second controlled detection distance; if not, and the difference value between the real-time distance and the second controlled detection distance is larger than the distance error tolerance value, the third controlled detection device returns calibration information to the vehicle-mounted unit, wherein the calibration information comprises the second controlled detection distance, and the second controlled detection distance is a standard measurement distance between the third controlled detection device and the first controlled detection device; and the vehicle-mounted unit receives the calibration information, continuously acquires the driving speed parameter by using a speed measurement sensing device of the vehicle-mounted unit, continuously calculates a second distance between the current position of the vehicle-mounted unit and the third controlled detection device according to the driving speed parameter, and takes the sum of the second distance and the second controlled detection distance as the real-time distance of the vehicle-mounted unit.
In this embodiment, the distance error tolerance value is introduced in this embodiment, and when the difference between the real-time distance and the second controlled detection distance is greater than the distance error tolerance value, the real-time distance of the on-board unit is corrected. The distance tolerance value may be set to a reasonable range that allows for distance errors.
Therefore, the real-time distance calculated by the vehicle-mounted unit is calibrated by the third controlled detection device through the second controlled detection distance, on one hand, when the difference value between the real-time distance and the second controlled detection distance is larger than the preset value, the high-speed entrance information can be prevented from being tampered to cause wrong payment amount, on the other hand, the distance measured by the vehicle-mounted unit is more accurate, and extra charging caused by overlong real-time distance to a vehicle owner is avoided.
As an optional implementation manner in this embodiment, the method provided in this embodiment further includes: the calibration controlled detection device calibrates acceleration sensing deviation of a test sensing device of the vehicle-mounted unit and calibrates clock deviation of the vehicle-mounted unit, wherein the calibration controlled detection device is one or more of a first controlled detection device, a second controlled detection device and a third controlled detection device. Specifically, the calibration controlled detection device transmits the health data to the on-board unit, and the on-board unit calibrates the deviation (acceleration sensing deviation, clock deviation) of itself using the health data. Through the calibration, the real-time distance measured and calculated by the vehicle-mounted unit can be more accurate.
By the distance measuring and calculating method of the vehicle-mounted unit provided by the embodiment, the vehicle-mounted unit can measure the actual driving distance of the vehicle after the vehicle enters the high speed in real time by using the built-in speed measuring and sensing device, and the measured actual driving distance is transmitted to the second controlled detection device after the vehicle reaches the high speed exit. Therefore, the ETC system calculates the payment amount according to the real-time distance measured and calculated by the vehicle-mounted unit, and the problem that the ETC system is economically damaged due to fee evasion by lawless persons through tampering with the high-speed entrance information recorded by the vehicle-mounted unit is effectively avoided.
The embodiment also provides a distance measuring and calculating system. Fig. 2 is a schematic structural diagram of the distance measuring system. As shown in fig. 2, the distance measuring system includes: a first controlled detection device 10, an on-board unit 20, and a second controlled detection device 30. The system adopts the distance measuring and calculating method of the vehicle-mounted unit, and related matters can refer to the description in the above, and the structure and the function are only briefly described here.
The first controlled detection device 10 is used for detecting that the vehicle-mounted unit 20 enters the communication range of the vehicle-mounted unit and sending a distance calculation instruction to the vehicle-mounted unit 20, wherein the first controlled detection device 10 is a controlled detection device at a high-speed entrance;
the vehicle-mounted unit 20 is configured to receive a distance calculation instruction sent by the first controlled detection device 10, continuously obtain a driving speed parameter by using a speed measurement sensing device of the vehicle-mounted unit 20, continuously calculate a first distance between the current position of the vehicle-mounted unit 20 and the first controlled detection device 10 according to the driving speed parameter, and use the first distance as a real-time distance of the vehicle-mounted unit 20;
a second controlled detection device 30 for detecting that the on-board unit 20 enters its communication range, and sending a distance return instruction to the on-board unit 20, the second controlled detection device 30 being a controlled detection device at a high-speed exit;
the on-board unit 20 is further configured to send the real-time distance of the on-board unit 20 to the second controlled detection device 30 after receiving the distance return instruction sent by the second controlled detection device 30;
the second controlled detection device 30 is further configured to receive the real-time distance, determine whether a difference between the real-time distance and the first controlled detection distance is greater than a preset value, and if so, take the real-time distance as a distance according to which the trip charging is performed, where the first controlled detection distance is a standard measurement distance between the second controlled detection device 30 and the first controlled detection device 10.
As an alternative implementation manner in this embodiment, as shown in fig. 3, the system provided in this embodiment further includes one or more third controlled detection devices 40, where each third controlled detection device 40 can perform distance calibration on the on-board unit 20.
A third controlled detection device 40 for detecting that the on-board unit 20 enters its communication range and sending a distance return instruction to the on-board unit 20, the third controlled detection device 40 being another controlled detection device than the first controlled detection device 10 and the second controlled detection device 30 in the toll booth;
the on-board unit 20 is configured to send the real-time distance of the on-board unit 20 to the third controlled detection device 40 after receiving the distance return instruction sent by the third controlled detection device 40;
the third controlled detection device 40 is configured to receive the real-time distance, determine whether a difference between the real-time distance and the second controlled detection distance is greater than a preset value, if not, and if the difference between the real-time distance and the second controlled detection distance is greater than a distance error tolerance value, the third controlled detection device 40 returns calibration information to the on-board unit 20, where the calibration information includes the second controlled detection distance, where the second controlled detection distance is a standard measurement distance between the third controlled detection device 40 and the first controlled detection device 10;
the on-board unit 20 is further configured to receive the calibration information, continuously obtain the driving speed parameter by using a speed measurement sensing device of the on-board unit 20, continuously calculate a second distance between the current position of the on-board unit 20 and the third controlled detection device 40 according to the driving speed parameter, and use a sum of the second distance and the second controlled detection distance as a real-time distance of the on-board unit 20.
As an optional implementation manner in this embodiment, the driving speed parameter includes: current acceleration and clock parameters.
As an optional implementation manner in this embodiment, the first controlled detection device 10 is further configured to calibrate an acceleration sensing offset of the test sensing device of the on-board unit 20, and calibrate a clock offset of the on-board unit 20;
the second controlled detection device 30 is further configured to calibrate an acceleration sensing offset of the test sensing device of the on-board unit 20, and calibrate a clock offset of the on-board unit 20;
the third controlled detection device 40 is also configured to calibrate the acceleration sensing offset of the test sensing device of the on-board unit 20, and to calibrate the clock offset of the on-board unit 20.
Through the distance measuring and calculating system provided by the embodiment, the vehicle-mounted unit can measure the actual running distance of the vehicle after the vehicle enters the high speed in real time by using the speed measuring and sensing device arranged in the vehicle-mounted unit, and the measured and calculated actual running distance is uploaded to the second controlled detection device after the vehicle reaches the high speed exit. Therefore, the ETC system calculates the payment amount according to the real-time distance measured and calculated by the vehicle-mounted unit, and the problem that the ETC system is economically damaged due to fee evasion by lawless persons through tampering with the high-speed entrance information recorded by the vehicle-mounted unit is effectively avoided.
Example 2
The embodiment provides a distance measuring and calculating method of an on-board unit. Fig. 4 is a flowchart of the distance measuring method of the on-board unit. As shown in fig. 4, the method includes the steps of:
s201, the vehicle-mounted unit receives a distance calculation instruction sent by a first controlled detection device, a speed measurement sensing device of the vehicle-mounted unit is used for continuously acquiring a driving speed parameter, a first distance between the current position of the vehicle-mounted unit and the first controlled detection device is continuously calculated according to the driving speed parameter, and the first distance is used as a real-time distance of the vehicle-mounted unit, wherein the first controlled detection device is a controlled detection device at a high-speed entrance;
in this embodiment, the controlled detection devices (including the first controlled detection device and the second controlled detection device and the third controlled detection device hereinafter) may be RSUs, communication devices provided on the gantry, and handheld devices that can communicate with the on-board unit. The controlled detection device can communicate with the vehicle-mounted unit in a 5.8G, Bluetooth, NFC, WIFI and other modes.
As an optional implementation manner in this embodiment, the driving speed parameter includes: current acceleration and clock parameters. In this embodiment, the speed measurement sensing device of the vehicle-mounted unit obtains the current real-time speed by calculating the current acceleration obtained by real-time measurement according to the inertial navigation principle, and obtains the distance between the current position and the initial position of the vehicle-mounted unit by calculating the clock parameter and the real-time speed.
S202, the vehicle-mounted unit receives a distance return instruction sent by a third controlled detection device and sends the real-time distance of the vehicle-mounted unit to the third controlled detection device;
s203, the vehicle-mounted unit receives calibration information sent by a third controlled detection device, wherein the calibration information is sent after the third controlled detection device judges that the difference value between the real-time distance and the second controlled detection distance is smaller than or equal to a preset value and larger than a distance error tolerance value, the calibration information comprises the second controlled detection distance, and the second controlled detection distance is a standard measurement distance between the third controlled detection device and the first controlled detection device;
s204, after the vehicle-mounted unit receives the calibration information, the vehicle-mounted unit continuously acquires the driving speed parameter by using a speed measurement sensing device of the vehicle-mounted unit, continuously calculates a second distance between the current position of the vehicle-mounted unit and a third controlled detection device according to the driving speed parameter, and takes the sum of the second distance and the second controlled detection distance as the real-time distance of the vehicle-mounted unit;
therefore, the real-time distance calculated by the vehicle-mounted unit is calibrated by the third controlled detection device through the second controlled detection distance, on one hand, when the difference value between the real-time distance and the second controlled detection distance is larger than the preset value, the high-speed entrance information can be prevented from being tampered to cause wrong payment amount, on the other hand, the distance measured by the vehicle-mounted unit is more accurate, and extra charging caused by overlong real-time distance to a vehicle owner is avoided.
And S205, after receiving the distance return instruction sent by the second controlled detection device, the vehicle-mounted unit sends the real-time distance of the vehicle-mounted unit to the second controlled detection device, wherein the second controlled detection device is a controlled detection device at a high-speed exit.
As an optional implementation manner in this embodiment, the method provided in this embodiment further includes: after the on-board unit receives the calibration parameters of the calibration controlled detection device, the acceleration sensing deviation of the test sensing device of the on-board unit is calibrated, and the clock deviation of the on-board unit is calibrated, wherein the calibration controlled detection device is one or more of a first controlled detection device, a second controlled detection device and a third controlled detection device. Specifically, the calibration controlled detection device transmits the health data to the on-board unit, and the on-board unit calibrates the deviation (acceleration sensing deviation, clock deviation) of itself using the health data. Through the calibration, the real-time distance measured and calculated by the vehicle-mounted unit can be more accurate.
By the distance measuring and calculating method of the vehicle-mounted unit provided by the embodiment, the vehicle-mounted unit can measure the actual driving distance of the vehicle after the vehicle enters the high speed in real time by using the built-in speed measuring and sensing device, and the measured actual driving distance is transmitted to the second controlled detection device after the vehicle reaches the high speed exit. Therefore, the ETC system calculates the payment amount according to the real-time distance measured and calculated by the vehicle-mounted unit, and the problem that the ETC system is economically damaged due to fee evasion by lawless persons through tampering with the high-speed entrance information recorded by the vehicle-mounted unit is effectively avoided.
The embodiment also provides an on-board unit. Fig. 5 is a schematic structural view of the on-board unit. As shown in fig. 5, the on-board unit 20 includes: a receiving module 201, a distance measuring module 202 and a transmitting module 203. The on-board unit 20 adopts the above-mentioned method for measuring and calculating the distance between the on-board units, and the above description is referred to for related matters, and only the structure and function will be briefly described here.
A receiving module 201, configured to receive a distance calculation instruction sent by a first controlled detection apparatus;
the distance measuring and calculating module 202 is configured to continuously obtain a driving speed parameter by using a speed measurement sensing device of the vehicle-mounted unit, continuously calculate a first distance between a current position of the vehicle-mounted unit and a first controlled detection device according to the driving speed parameter, and use the first distance as a real-time distance of the vehicle-mounted unit, where the first controlled detection device is a controlled detection device at a high-speed entrance;
the receiving module 201 is further configured to receive a distance return instruction sent by a third controlled detection apparatus;
a sending module 203, configured to send the real-time distance of the vehicle-mounted unit to a third controlled detection device;
the receiving module 201 is further configured to receive calibration information sent by a third controlled detection device, where the calibration information is sent by the third controlled detection device after determining that a difference between the real-time distance and the second controlled detection distance is smaller than or equal to a preset value and is greater than a distance error tolerance value, and the calibration information includes the second controlled detection distance, where the second controlled detection distance is a standard measurement distance between the third controlled detection device and the first controlled detection device;
the distance measuring and calculating module 202 is further configured to continuously obtain the driving speed parameter by using a speed measuring and sensing device of the vehicle-mounted unit after receiving the calibration information, continuously calculate a second distance between the current position of the vehicle-mounted unit and a third controlled detection device according to the driving speed parameter, and use a sum of the second distance and the second controlled detection distance as a real-time distance of the vehicle-mounted unit;
the receiving module 201 is further configured to receive a distance return instruction sent by the second controlled detection apparatus;
the sending module 203 is further configured to send the real-time distance of the vehicle-mounted unit to a second controlled detection device, where the second controlled detection device is a controlled detection device at a high-speed exit.
Through the vehicle-mounted unit provided by the embodiment, the actual driving distance of the vehicle after the vehicle enters the high speed is measured in real time by using the speed measuring sensing device arranged in the vehicle-mounted unit, and the measured actual driving distance is transmitted to the second controlled detection device after the vehicle reaches the high speed exit. Therefore, the ETC system calculates the payment amount according to the real-time distance measured and calculated by the vehicle-mounted unit, and the problem that the ETC system is economically damaged due to fee evasion by lawless persons through tampering with the high-speed entrance information recorded by the vehicle-mounted unit is effectively avoided.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. A method for distance estimation of a vehicle-mounted unit, comprising:
the method comprises the steps that a first controlled detection device detects that a vehicle-mounted unit enters a communication range of the vehicle-mounted unit, and sends a distance calculation instruction to the vehicle-mounted unit, wherein the first controlled detection device is a controlled detection device at a high-speed entrance;
the vehicle-mounted unit receives a distance calculation instruction sent by the first controlled detection device, a speed measurement sensing device of the vehicle-mounted unit is used for continuously acquiring a driving speed parameter, a first distance between the current position of the vehicle-mounted unit and the first controlled detection device is continuously calculated according to the driving speed parameter, and the first distance is used as a real-time distance of the vehicle-mounted unit;
a second controlled detection device detects that the vehicle-mounted unit enters a communication range of the vehicle-mounted unit, and sends a distance return instruction to the vehicle-mounted unit, wherein the second controlled detection device is a controlled detection device at a high-speed outlet;
after receiving the distance return instruction sent by the second controlled detection device, the vehicle-mounted unit sends the real-time distance of the vehicle-mounted unit to the second controlled detection device;
the second controlled detection device receives the real-time distance, judges whether the difference value between the real-time distance and a first controlled detection distance is larger than a preset value, and if so, takes the real-time distance as a distance according to which the trip charging is carried out, wherein the first controlled detection distance is a standard measurement distance between the second controlled detection device and the first controlled detection device; wherein, after the taking the first distance as the real-time distance of the on-board unit, before the second controlled detection device detects that the on-board unit enters its communication range, further comprising:
a third controlled detection device detects that the vehicle-mounted unit enters the communication range of the vehicle-mounted unit, and sends the distance return instruction to the vehicle-mounted unit, wherein the third controlled detection device is other controlled detection devices except the first controlled detection device and the second controlled detection device in a high-speed toll station;
after receiving the distance return instruction sent by the third controlled detection device, the vehicle-mounted unit sends the real-time distance of the vehicle-mounted unit to the third controlled detection device;
the third controlled detection device receives the real-time distance and judges whether the difference value between the real-time distance and the second controlled detection distance is larger than the preset value, if so, the third controlled detection device returns calibration information to the vehicle-mounted unit, and the calibration information comprises the second controlled detection distance; if not, and the difference value between the real-time distance and the second controlled detection distance is larger than a distance error tolerance value, the third controlled detection device returns calibration information to the vehicle-mounted unit, wherein the calibration information comprises the second controlled detection distance, and the second controlled detection distance is a standard measurement distance between the third controlled detection device and the first controlled detection device;
and the vehicle-mounted unit receives the calibration information, continuously acquires the driving speed parameter by using a speed measurement sensing device of the vehicle-mounted unit, continuously calculates a second distance between the current position of the vehicle-mounted unit and the third controlled detection device according to the driving speed parameter, and takes the sum of the second distance and the second controlled detection distance as the real-time distance of the vehicle-mounted unit.
2. The method of claim 1, wherein:
the driving speed parameters comprise: current acceleration and clock parameters.
3. The method of claim 2, wherein: the method further comprises the following steps:
and the calibration controlled detection device calibrates the acceleration sensing deviation of the test sensing device of the on-board unit and calibrates the clock deviation of the on-board unit, wherein the calibration controlled detection device is one or more of the first controlled detection device, the second controlled detection device and the third controlled detection device.
4. A method for distance estimation of a vehicle-mounted unit, comprising:
the method comprises the steps that a vehicle-mounted unit receives a distance calculation instruction sent by a first controlled detection device, a speed measurement sensing device of the vehicle-mounted unit is used for continuously acquiring a driving speed parameter, a first distance between the current position of the vehicle-mounted unit and the first controlled detection device is continuously calculated according to the driving speed parameter, and the first distance is used as the real-time distance of the vehicle-mounted unit, wherein the first controlled detection device is a controlled detection device at a high-speed entrance;
the vehicle-mounted unit receives a distance return instruction sent by a third controlled detection device and sends the real-time distance of the vehicle-mounted unit to the third controlled detection device;
the vehicle-mounted unit receives calibration information sent by a third controlled detection device, wherein the calibration information is sent by the third controlled detection device after judging that the difference value between the real-time distance and a second controlled detection distance is smaller than or equal to a preset value and larger than a distance error tolerance value, the calibration information comprises the second controlled detection distance, and the second controlled detection distance is a standard measurement distance between the third controlled detection device and the first controlled detection device;
after the vehicle-mounted unit receives the calibration information, the vehicle-mounted unit continuously acquires the driving speed parameter by using a speed measurement sensing device of the vehicle-mounted unit, continuously calculates a second distance between the current position of the vehicle-mounted unit and the third controlled detection device according to the driving speed parameter, and takes the sum of the second distance and the second controlled detection distance as the real-time distance of the vehicle-mounted unit;
and after receiving the distance return instruction sent by a second controlled detection device, the vehicle-mounted unit sends the real-time distance of the vehicle-mounted unit to the second controlled detection device, wherein the second controlled detection device is a controlled detection device at a high-speed outlet.
5. A distance measuring system, comprising:
the first controlled detection device is used for detecting that the vehicle-mounted unit enters a communication range of the vehicle-mounted unit and sending a distance calculation instruction to the vehicle-mounted unit, wherein the first controlled detection device is a controlled detection device at a high-speed entrance;
the vehicle-mounted unit is used for receiving a distance calculation instruction sent by the first controlled detection device, continuously acquiring a driving speed parameter by using a speed measurement sensing device of the vehicle-mounted unit, continuously calculating a first distance between the current position of the vehicle-mounted unit and the first controlled detection device according to the driving speed parameter, and taking the first distance as a real-time distance of the vehicle-mounted unit;
the second controlled detection device is used for detecting that the vehicle-mounted unit enters the communication range of the vehicle-mounted unit and sending a distance return instruction to the vehicle-mounted unit, and the second controlled detection device is a controlled detection device at a high-speed outlet;
the vehicle-mounted unit is further used for sending the real-time distance of the vehicle-mounted unit to the second controlled detection device after receiving the distance return instruction sent by the second controlled detection device;
the second controlled detection device is further configured to receive the real-time distance, determine whether a difference between the real-time distance and a first controlled detection distance is greater than a preset value, and if so, take the real-time distance as a distance according to which the trip charging is performed, where the first controlled detection distance is a standard measurement distance between the second controlled detection device and the first controlled detection device;
a third controlled detection device, configured to detect that the on-board unit enters a communication range of the on-board unit, and send the distance return instruction to the on-board unit, where the third controlled detection device is another controlled detection device except the first controlled detection device and the second controlled detection device in a high-speed toll station;
the vehicle-mounted unit is further used for sending the real-time distance of the vehicle-mounted unit to the third controlled detection device after receiving the distance return instruction sent by the third controlled detection device;
the third controlled detection device is further configured to receive the real-time distance, and determine whether a difference between the real-time distance and a second controlled detection distance is greater than the preset value, if not, and if the difference between the real-time distance and the second controlled detection distance is greater than a distance tolerance value, the third controlled detection device returns calibration information to the vehicle-mounted unit, where the calibration information includes the second controlled detection distance, and the second controlled detection distance is a standard measurement distance between the third controlled detection device and the first controlled detection device;
and the vehicle-mounted unit is further used for receiving the calibration information, continuously acquiring the driving speed parameter by using a speed measurement sensing device of the vehicle-mounted unit, continuously calculating a second distance between the current position of the vehicle-mounted unit and the third controlled detection device according to the driving speed parameter, and taking the sum of the second distance and the second controlled detection distance as the real-time distance of the vehicle-mounted unit.
6. The system of claim 5, wherein:
the driving speed parameters comprise: current acceleration and clock parameters.
7. The system of claim 6, wherein:
the first controlled detection device is also used for calibrating the acceleration sensing deviation of the test sensing device of the vehicle-mounted unit and calibrating the clock deviation of the vehicle-mounted unit;
the second controlled detection device is also used for calibrating the acceleration sensing deviation of the test sensing device of the vehicle-mounted unit and calibrating the clock deviation of the vehicle-mounted unit;
the third controlled detection device is further configured to calibrate an acceleration sensing deviation of the test sensing device of the on-board unit, and calibrate a clock deviation of the on-board unit.
8. An on-board unit, comprising:
the receiving module is used for receiving a distance calculation instruction sent by the first controlled detection device;
the distance measuring and calculating module is used for continuously acquiring a driving speed parameter by using a speed measuring and sensing device of the vehicle-mounted unit, continuously calculating a first distance between the current position of the vehicle-mounted unit and the first controlled detection device according to the driving speed parameter, and taking the first distance as the real-time distance of the vehicle-mounted unit, wherein the first controlled detection device is a controlled detection device at a high-speed entrance;
the receiving module is further used for receiving a distance return instruction sent by a third controlled detection device;
the sending module is used for sending the real-time distance of the vehicle-mounted unit to the third controlled detection device;
the receiving module is further configured to receive calibration information sent by a third controlled detection device, where the calibration information is sent by the third controlled detection device after determining that a difference between the real-time distance and a second controlled detection distance is smaller than or equal to a preset value and larger than a distance error tolerance value, and the calibration information includes the second controlled detection distance, where the second controlled detection distance is a standard measurement distance between the third controlled detection device and the first controlled detection device;
the distance measuring and calculating module is further configured to continuously obtain the driving speed parameter by using a speed measuring and sensing device of the vehicle-mounted unit after receiving the calibration information, continuously calculate a second distance between the current position of the vehicle-mounted unit and the third controlled detection device according to the driving speed parameter, and use the sum of the second distance and the second controlled detection distance as the real-time distance of the vehicle-mounted unit;
the receiving module is further configured to receive the distance return instruction sent by the second controlled detection device;
the sending module is further configured to send the real-time distance of the on-board unit to the second controlled detection device, and the second controlled detection device is a controlled detection device at a high-speed exit.
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