CN113870580A - Overspeed detection method and device for truck, truck vehicle and truck system - Google Patents
Overspeed detection method and device for truck, truck vehicle and truck system Download PDFInfo
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- CN113870580A CN113870580A CN202111022137.3A CN202111022137A CN113870580A CN 113870580 A CN113870580 A CN 113870580A CN 202111022137 A CN202111022137 A CN 202111022137A CN 113870580 A CN113870580 A CN 113870580A
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- G08G1/00—Traffic control systems for road vehicles
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- G08G1/052—Detecting movement of traffic to be counted or controlled with provision for determining speed or overspeed
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Abstract
The application provides an overspeed detection method and device for a truck, a truck vehicle and a truck system, wherein the overspeed detection method comprises the following steps: receiving current position information and speed information of a vehicle, and determining a speed limit value of a road where the vehicle is located according to the position information and a preset road data set; judging whether the vehicle is suspected to overspeed at present according to the speed information and the speed limit value; if so, determining the time interval between the time for carrying out overspeed detection again and the current moment; updating the speed information and the speed limit value after the time interval is reached, and judging whether the vehicle is suspected to overspeed again; and if the suspected overspeed of the vehicle is determined again, determining that the vehicle is overspeed. According to the method and the device, the overspeed of the vehicle is determined only when two continuous overspeed detection results of the vehicle are overspeed, so that the overspeed detection accuracy of the truck can be effectively improved.
Description
Technical Field
The application belongs to the technical field of trucks, and particularly relates to an overspeed detection method and device for a truck, a truck vehicle and a truck system.
Background
Trucks (also called trucks or trucks) are the indispensable commercial vehicles in our daily lives as the main vehicles for carrying goods on land. Because the general size of freight train is great, the weight is heavier, and often inertia is also big, and the braking distance that needs and braking time are also longer. Therefore, if the truck is over-speed, the accident is difficult to be caused by timely braking, and the higher the speed is, the larger the inertia is, the larger the impact force is, the more serious the result is, and the greater the loss is caused to other vehicles, pedestrians and the like. Therefore, once the truck is over-speed, the truck has great safety hazard.
At present, the driver usually watches the road speed limit sign and the speedometer for self judgment or reminds by a navigator, wherein if the driver judges by the driver, the driver is easy to overspeed due to unfamiliar roads or untimely observation of the speedometer (particularly when the driver is tired of driving), and the driver is not practical to rely on navigation completely, so that overspeed driving is easy to cause once the navigation is wrong, and then traffic accidents can be caused.
Disclosure of Invention
The application provides an overspeed detection method and device for a truck, a truck vehicle and a truck system, and the overspeed detection accuracy of the truck can be effectively improved by determining that the vehicle is overspeed when two consecutive overspeed detection results of the vehicle are overspeed.
An embodiment of a first aspect of the present application provides an overspeed detection method for a truck, the method including:
receiving current position information and speed information of a vehicle, and determining a speed limit value of a road where the vehicle is located according to the position information and a preset road data set;
judging whether the vehicle is suspected to overspeed or not according to the speed information and the speed limit value;
if so, determining the time interval between the time for carrying out overspeed detection again and the current moment;
after the time interval is reached, updating the speed information and the speed limit value, and judging whether the vehicle is suspected to overspeed again; and if the suspected overspeed of the vehicle is determined again, determining that the vehicle is overspeed.
Optionally, determining the time interval between the time for performing the overspeed detection again and the current time includes:
determining a braking distance of the vehicle at a current speed;
and according to the braking distance, calculating the time interval between the time for carrying out overspeed detection again and the current moment according to the following formula:
T＝S/(kv)
where T denotes a time interval between the time when the overspeed detection is performed again and the current time, S denotes a braking distance at the current speed, v denotes the current speed, and k denotes a reaction coefficient of the driver.
Optionally, judging whether the vehicle is suspected to overspeed currently according to the speed information and the speed limit value includes:
when the speed limit value of the road where the vehicle is located is smaller than a specified threshold value, if the current speed of the vehicle exceeds a specified multiple of the speed limit value of the road where the vehicle is located, determining that the vehicle is suspected to overspeed currently;
and when the speed limit value of the road where the vehicle is located is greater than or equal to the specified threshold value, if the current speed of the vehicle is greater than or equal to the specified threshold value, determining that the vehicle is suspected to overspeed currently.
Optionally, after receiving the current position information and speed information of the vehicle, before determining the speed limit value of the road on which the vehicle is currently located according to the position information and a preset road data set, the method further includes:
filtering non-compliance data in the position information and the speed information; the non-compliance data includes: the longitude or the latitude in the position information is zero or does not belong to the Chinese range, the speed information received twice continuously comprises a flameout state and a stop state, the position information received twice continuously deviates by more than or equal to a specified distance, and the time interval between the two times of receiving the position information continuously is more than specified time.
Optionally, the vehicle comprises a retarder, and the method further comprises, after determining that the vehicle is speeding:
and sending an opening instruction to the speed slowing device to enable the speed slowing device to decelerate the vehicle until the speed of the vehicle is reduced below a specified speed.
Optionally, the vehicle further includes a voice module, and after determining whether the vehicle is suspected to overspeed according to the speed information and the speed limit value, the method further includes:
and sending a voice reminding instruction to the voice module to enable the voice module to send out speed-reducing driving voice reminding.
Embodiments of a second aspect of the present application provide an overspeed detecting apparatus for a truck, the apparatus comprising:
the data processing module is used for receiving the current position information and speed information of a vehicle and determining the speed limit value of the road where the vehicle is located according to the position information and a preset road data set;
the first overspeed judging module is used for judging whether the vehicle is suspected to overspeed or not according to the speed information and the speed limit value;
the time determining module is used for determining the time interval between the time for carrying out overspeed detection again and the current moment if the vehicle is suspected to overspeed currently;
and the secondary overspeed judgment module is used for updating the speed information and the speed limit value after the time interval is reached, judging whether the vehicle is suspected to overspeed or not again, and determining that the vehicle is overspeed if the vehicle is determined to be overspeed again.
Embodiments of the third aspect of the present application provide a truck vehicle, where the vehicle is connected to the overspeed detection apparatus for a truck, and current position information and speed information of the vehicle are sent to the overspeed detection apparatus for a truck at specified intervals, so that the overspeed detection apparatus for a truck can perform overspeed detection on the vehicle.
Optionally, the vehicle includes a retarder, and the retarder is connected to the overspeed detection device for the truck and decelerates the vehicle until the vehicle speed is reduced to a specified speed after receiving an opening instruction sent by the overspeed detection device for the truck.
Optionally, the vehicle further includes a voice module, and the voice module is connected to the overspeed detection device for the truck and sends a deceleration driving voice prompt when receiving a voice prompt instruction sent by the overspeed detection device for the truck.
Embodiments of a fourth aspect of the present application provide a truck system comprising the truck vehicle of the third aspect and further comprising the overspeed detection apparatus for trucks of the second aspect.
The technical scheme provided in the embodiment of the application at least has the following technical effects or advantages:
according to the overspeed detection method for the truck, after the suspected overspeed of the vehicle is determined firstly, the time interval of judging whether the vehicle is overspeed or not is calculated accurately according to the current speed and the speed limit value of the vehicle, and the vehicle is determined to be overspeed after the suspected overspeed of the vehicle is determined again.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to refer to like parts throughout the drawings.
In the drawings:
FIG. 1 is a schematic flow chart illustrating an overspeed detection method for a truck according to an embodiment of the present disclosure;
fig. 2 shows a schematic structural diagram of an overspeed detecting device for a truck according to an embodiment of the present application.
Detailed Description
Exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which this application belongs.
An overspeed detection method and device for a truck, a truck vehicle and a truck system according to embodiments of the present application are described below with reference to the accompanying drawings. The overspeed detection method can be executed through the overspeed detection device, and is applied to trucks to more accurately detect whether the trucks overspeed.
As shown in fig. 1, an overspeed detection method for a truck according to an embodiment of the present application may include the following steps:
and step S1, receiving the current position information and speed information of the vehicle, and determining the speed limit value of the road where the vehicle is located according to the position information and a preset road data set.
The position information may include longitude and latitude of a position of the vehicle, a body direction of the vehicle, and the like, the speed information may include a specific speed of the vehicle, and it may be determined whether the vehicle stalls according to the speed information for a plurality of times (for example, it may be determined as a stall state when the speed is 0 for two times), and it may be determined whether the vehicle stalls in combination with the position information (for example, the corresponding position information is that the position of the vehicle does not belong to a driving road when the stall state is established). The preset road data set can comprise massive road information of China and corresponding speed limit data. It should be noted that the road in the speed limit values of the road may be a lane, that is, the speed limit values of different lanes on the same highway may be the same or different, and especially when the speed limit values of different lanes (such as on an expressway) are different, the speed limit value of the road actually refers to the speed limit value of the lane where the vehicle is located.
Specifically, the existing national standard GPS system can be installed on the vehicle, the position information of the vehicle can be detected in real time, the vehicle control system can send the position information and the speed information of the vehicle to the overspeed detection device, the overspeed detection device is provided with a corresponding analysis program of the standard GPS system, the specific position of the vehicle can be accurately analyzed after the position information sent by the vehicle control system is received, the specific position can be refined to specific longitude and latitude, the lane number of which road section the specific position of the vehicle is located can be determined by combining a preset road data set, and therefore the speed limit value of the current road of the vehicle can be accurately judged.
Further, the speed limit value may be that the overspeed detection apparatus can determine only the speed limit value (that is, it may be equal to the speed limit value of the corresponding road specified by the traffic regulation or slightly smaller than the speed limit value of the corresponding road specified by the traffic regulation) based on the existing massive road speed limit data (that is, the speed limit value of the corresponding road specified by the traffic regulation) and the large data analysis result precipitation (the real overspeed judgment scene), thereby judging whether the vehicle is overspeed according to the speed limit value.
In a specific implementation manner of this embodiment, after receiving the current location information and speed information of the vehicle, before determining the speed limit value of the road where the vehicle is currently located according to the location information and the preset road data set, the overspeed detection method may further include the following processing: filtering non-compliance data in the location information and the velocity information.
Wherein the non-compliance data includes: a. the longitude or latitude in the position information is zero or does not belong to the Chinese range (the detection device may not be capable of accurately analyzing the specific position of the vehicle); b. the speed information received twice continuously comprises a flameout state and a stop state; c. and the offset of the position information received twice continuously is greater than or equal to the specified distance; d. and the time interval between two consecutive times of receiving the position information is greater than the specified time; e. the direction of the vehicle body is not in the range of 0-360 degrees.
In general, a vehicle control system reports position information and speed information of a vehicle to a detection device at an interval of specified time (the value of the specified time can refer to human reaction time of 2-4 seconds, such as 3 seconds, and the overspeed warning effect cannot be achieved after the reporting of the reaction time is exceeded), so that the time interval of continuously receiving position information twice is greater than the specified time (if the interval time is greater than or equal to 10 seconds), the reporting time error may be caused by the fault of the vehicle control system, the receiving time error may be caused by the fault of the detection device, and obviously, the reported data are both wrong in the two cases, and the final overspeed judgment result is wrong, and belongs to non-compliant data. Further, since the vehicle control system reports the position information and the speed information of the vehicle to the detection device at a specified time interval, the travel distance of the vehicle within the specified time usually has a specified distance (the specified distance may be 5 kilometers in view of the value of the specified time), and if the deviation of the position information received twice consecutively is greater than the specified distance, it indicates that the data reported twice is erroneous at least once, and then the final overspeed judgment result is also erroneous, and also belongs to non-compliant data. Furthermore, if the speed information received twice in succession includes a flameout state and a stop state, the overspeed is not determined in this case, and therefore the speed information also belongs to non-compliance data. In addition, if the longitude or latitude in the position information is zero or does not belong to the chinese range, or the vehicle body direction is not in the range of 0 to 360 degrees, the detection device may not accurately analyze the specific position of the vehicle, and then cannot determine whether the vehicle is overspeed, so that the vehicle also belongs to non-compliance data. The embodiment filters the non-compliance data, so that the calculated amount of the detection device can be reduced, the calculation speed is increased, the real-time effect of overspeed judgment is better, and the accuracy and the qualification of the overspeed judgment can be improved.
And step S2, judging whether the vehicle is suspected to overspeed at present according to the speed information and the speed limit value.
Here, the case where it is determined that the vehicle is overspeed at one time is called a suspected overspeed, and the actual overspeed of the vehicle is determined only when it is determined that the vehicle is overspeed again as described below.
In another embodiment of this embodiment, the step S2 may include the following steps: when the speed limit value of the road where the vehicle is located is smaller than a specified threshold value, if the current speed of the vehicle exceeds a specified multiple of the speed limit value of the road where the vehicle is located, determining that the vehicle is suspected to overspeed currently; when the speed limit value of the road where the vehicle is located is larger than or equal to the specified threshold value, if the current speed of the vehicle is larger than or equal to the specified threshold value, the current suspected overspeed of the vehicle is determined.
In this embodiment, since an overspeed accident is likely to occur when the running speed of the truck is too high, the detection device can directly determine that the vehicle is suspected to overspeed regardless of the speed limit of the position where the vehicle is located when the detection device finds that the speed of the vehicle is greater than or equal to the predetermined threshold value. And then when the real-time speed of the vehicle is less than a specified threshold value, the judgment can be carried out by combining the speed limit value, and the current suspected overspeed of the vehicle is determined when the current speed of the vehicle exceeds the specified multiple of the speed limit value of the road where the vehicle is located. The specified multiple may be greater than or equal to 1, for example, the current speed of the vehicle exceeds 10% of the speed limit of the road where the vehicle is located, that is, the specified multiple is equal to 1.1.
It should be noted that the above-mentioned specified threshold may be understood as the highest speed limit value of the truck vehicle, and generally, the highest speed limit values of the vehicles with different loads are different (the highest speed limit is lower as the load is higher), and the highest speed limit values of different lanes of the same vehicle are also different (the speed limit on the left side of the lane is lower).
Further, the vehicle may further include a voice module, and after judging whether the vehicle is currently suspected to overspeed according to the speed information and the speed limit value, the overspeed detection method may include the following processing: and sending a voice reminding instruction to the voice module to enable the voice module to send speed reduction driving voice reminding so as to guide a driver to actively reduce the speed of the vehicle, so that the situation of overspeed under the condition of fatigue driving or distracted attention of the driver can be prevented.
In step S3, if the vehicle is currently suspected to overspeed, the time interval between the time when the overspeed detection is performed again and the current time is determined.
In this embodiment, the required braking distance is different in consideration of the difference between the speed and the friction coefficient of the road during the running of the vehicle, and the time for determining whether the vehicle is overspeed at the second time may be determined according to the current speed of the vehicle and the braking distance at the current speed (normally, if the driver recognizes the first overspeed and reduces the speed in time, the vehicle should not overspeed at the second time, and if the vehicle is overspeed at the second time, it indicates that the driver does not have the awareness of overspeed and is likely to overspeed).
Specifically, this step S3 may include the following processing: determining the braking distance of the vehicle at the current speed; and according to the braking distance, calculating the time interval between the time for carrying out overspeed detection again and the current moment according to the following formula: and T is S/(kv).
Where T denotes a time interval between the time when the overspeed detection is performed again and the current time, S denotes a braking distance at the current speed, v denotes the current speed, and k denotes a reaction coefficient of the driver.
According to the calculation method of the braking distance, the factors influencing the braking distance of the vehicle comprise the vehicle condition, the road condition and the reaction condition of the driver, wherein the vehicle condition comprises the weight (namely the load) and the speed of the vehicle. The road condition includes a road speed limit value and a ground friction coefficient, wherein the road speed limit value can be used as a factor influencing the vehicle speed, and the ground friction coefficient can be judged according to an actual road medium by referring to a general friction coefficient table and is generally determined according to an asphalt road, a rainy and snowy weather, a plum rain season, a dry ground and the like. The reaction condition of the driver is the driver sensitivity coefficient, which can be calculated by a formula, for example, the time interval of data reporting is fastest 1 second, slowest 3 seconds (the stress reaction time of the human is within 3 seconds), the lowest vehicle speed is 61km/h, the highest vehicle speed is 100km/h (the overrun speed of the truck can reach 61-100km/h), then: 202/3/61-1.10, 202/3/100-0.67, 202/1/61-3.31, 202/1/100-2.02, and the threshold range of the sensitivity coefficient is calculated by extremum, and one maximum value and one minimum value are removed, so that the reasonable threshold range of the sensitivity coefficient can be 1.10-2.02.
According to the influence factors, the braking distance can be calculated according to the following formula: the braking distance (vehicle load tonnage: square of vehicle instantaneous speed)/(2 friction coefficient: vehicle load tonnage: gravity coefficient) can be simplified to the following formula:
S＝v2/2μg
where S denotes a braking distance, v denotes a current speed of the vehicle, μ denotes a sum of a friction coefficient between the vehicle and the road and a friction coefficient of a vehicle deceleration device, and g denotes a gravitational acceleration.
And the time interval between the time when the overspeed detection is performed again and the current time may be equal to the braking distance/(driver sensitivity coefficient ×. vehicle current speed), i.e., T ═ S/(kv), where T denotes the time interval between the time when the overspeed detection is performed again and the current time, S denotes the braking distance at the current speed, v denotes the current speed, and k denotes the reaction coefficient of the driver. The calculation formula of the braking distance S is substituted into the calculation formula of the time interval T, and T becomes V/2 μ gk.
For example, when a truck travels on a road, the fixed speed limit value of the road is 60km/h, the vehicle direction is 70 degrees, the weight (tonnage after load) of the vehicle is 20 tons, if a non-stop position is reported for 10 points, 01 minutes and 30 seconds, the speed of the vehicle at that time is 66km/h, the friction coefficient of the asphalt road is 0.6, the friction coefficient of a speed slowing device of the vehicle is 0.5, the driver sensitivity coefficient is 1.2, and the gravity coefficient is 9.8, and the calculation formula is substituted by: the braking distance (20 × 66)/2 × 2 (0.6+0.5) × (20 × 9.8) ═ 202 m, and the secondary determination time interval (202/1.2 × 66) ═ 2.5 s (or directly substituted T ═ V/2 μ gk). Then, the second reporting time point is 10 points, 01 minutes and 32 seconds, a non-stop position is reported, and if the reported vehicle speed is 68km/h, the overspeed judgment strategy (exceeding the road speed limit by more than 10%) is met at the moment.
Step S4, updating the speed information and the speed limit value after the time interval is reached, and judging whether the vehicle is suspected to overspeed again; and if the suspected overspeed of the vehicle is determined again, determining that the vehicle is overspeed.
In this embodiment, after the time interval is reached, the overspeed detection apparatus will re-determine the speed limit value according to the speed information and the location information reported again at that time, then re-determine whether the vehicle is suspected to overspeed according to the new speed limit value and the re-reported speed information, and determine that the vehicle is overspeed after re-determining that the vehicle is suspected to overspeed.
It can be understood that, in this embodiment, the vehicle overspeed is determined only when both determinations are suspected to be overspeed, and the interval of the two reporting times is the time interval determined according to the above method, and if the positions for 2 consecutive times do not satisfy the above re-determination time interval condition, the vehicle overspeed is not recorded, for example, if the time interval between the two positions is too long, the driver steps on the brake halfway, the vehicle speed drops below the speed limit, the vehicle overspeed is not recorded for the first time, and if the time interval between the two positions is too short, the vehicle overspeed is not recorded for the first time. And if the speed limit value is not obtained after the time for judging again is reached, recalculating the continuous normal position (recalculating the first suspected overspeed).
In another specific implementation manner of this embodiment, the vehicle may further include a speed slowing device, and after determining that the vehicle is overspeed, the method may further include: and sending an opening instruction to the retarding device to enable the retarding device to decelerate the vehicle until the vehicle is reduced to below the specified vehicle speed. Therefore, the vehicle can be automatically kept in a safe speed range for driving, the driving safety is further improved, and the accident rate caused by overspeed is further reduced. The designated speed is smaller than the speed limit value of the road where the vehicle is currently located, and the effect that the speed of the vehicle is reduced by the speed retarder can be achieved.
According to the overspeed detection method for the truck, after the suspected overspeed of the vehicle is determined firstly, the time interval of judging whether the vehicle is overspeed again is accurately calculated according to the current speed and the speed limit value of the vehicle, and the vehicle is determined to be overspeed after the suspected overspeed of the vehicle is determined again.
Based on the same concept of the overspeed detecting method for a truck as described above, the present embodiment also provides an overspeed detecting apparatus for a truck, as shown in fig. 2, the overspeed detecting apparatus 100 includes:
the data processing module 110 is configured to receive current position information and speed information of a vehicle, and determine a speed limit value of a road where the vehicle is currently located according to the position information and a preset road data set;
a first overspeed judgment module 120, configured to judge whether the vehicle is suspected to overspeed currently according to the speed information and the speed limit value;
a time determining module 130, configured to determine, if the vehicle is currently suspected to overspeed, a time interval between the time for performing the overspeed detection again and the current time;
and the secondary overspeed judgment module 140 is configured to update the speed information and the speed limit value after the time interval is reached, judge whether the vehicle is suspected to overspeed again, and determine that the vehicle is overspeed if the vehicle is determined to be overspeed again.
The overspeed detection device for the truck provided by the embodiment has the same concept as the overspeed detection method for the truck, and at least can achieve the beneficial effects which can be achieved by the overspeed detection method, and is not repeated herein.
Based on the same concept of the overspeed detection method for a truck, the present embodiment also provides a truck vehicle, which is connected to the overspeed detection apparatus for a truck, and sends the current position information and speed information of the vehicle to the overspeed detection apparatus for a truck at specified intervals, so that the overspeed detection apparatus for a truck can perform overspeed detection on the vehicle.
The truck vehicle provided by the embodiment has the same concept as the overspeed detection method for the truck, and at least can achieve the beneficial effects that the overspeed detection method can achieve, and the details are not repeated herein.
In a specific implementation manner of this embodiment, the vehicle further includes a retarder, and the retarder is connected to the overspeed detection device for the truck, and decelerates the vehicle until the vehicle falls below the specified speed after receiving the start instruction sent by the overspeed detection device for the truck.
The designated speed is smaller than the speed limit value of the road where the vehicle is currently located, and the effect that the speed of the vehicle is reduced by the speed retarder can be achieved.
In this embodiment, the retarder is connected to an overspeed detection device for a truck, and can be automatically turned on after receiving a turn-on command sent by the overspeed detection device, so as to control the maximum vehicle speed to be less than a specified vehicle speed (e.g., 90% of a speed limit value), and prevent a driver from continuously driving at an overspeed. The retarder can be a hydraulic retarder, a pneumatic retarder, an electric retarder and the like, and the retarder threshold supports control of real-time judgment of the current road speed limit value. Specifically, a speed limit threshold of the retarder can be set to ensure that the highest speed of the vehicle can be below the speed limit threshold under the action of the retarder. The specific value of the speed limit threshold may be obtained according to an actual situation, which is not specifically limited in this embodiment.
Further, the vehicle can further comprise a voice module, wherein the voice module is connected with an overspeed detection device for the truck, and sends out speed reduction driving voice prompt after receiving a voice prompt instruction sent by the overspeed detection device for the truck. For example, the current speed of the vehicle is 66km/h, the speed limit value is 60km/h, the voice module can send out a deceleration driving prompt after receiving a voice prompt instruction sent by an overspeed detection device for a truck, guide a driver to reduce the vehicle speed to 60km/h, and prompt automatic closing after the speed of the vehicle is reduced.
Based on the same concept of the overspeed detection method for the truck, the embodiment further provides a truck system, which includes the truck vehicle and the overspeed detection device, and the overspeed detection device can be used as a remote terminal to be in network and communication connection with a control system of the truck vehicle so as to send data and instructions to each other.
The truck system provided by this embodiment, with the same concept as the overspeed detection method for trucks, can at least achieve the beneficial effects that the overspeed detection method can achieve, and is not described herein again.
It should be noted that the above-mentioned embodiments illustrate rather than limit the application, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The application may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
The above description is only for the preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (11)
1. An overspeed detection method for trucks, characterized in that it comprises:
receiving current position information and speed information of a vehicle, and determining a speed limit value of a road where the vehicle is located according to the position information and a preset road data set;
judging whether the vehicle is suspected to overspeed or not according to the speed information and the speed limit value;
if so, determining the time interval between the time for carrying out overspeed detection again and the current moment;
after the time interval is reached, updating the speed information and the speed limit value, and judging whether the vehicle is suspected to overspeed again; and if the suspected overspeed of the vehicle is determined again, determining that the vehicle is overspeed.
2. The method of claim 1, wherein determining the time interval between the time to again perform the overspeed test and the current time comprises:
determining a braking distance of the vehicle at a current speed;
and according to the braking distance, calculating the time interval between the time for carrying out overspeed detection again and the current moment according to the following formula:
T＝S/(kv)
where T denotes a time interval between the time when the overspeed detection is performed again and the current time, S denotes a braking distance at the current speed, v denotes the current speed, and k denotes a reaction coefficient of the driver.
3. The method of claim 1, wherein determining whether the vehicle is currently suspected to overspeed according to the speed information and the speed limit value comprises:
when the speed limit value of the road where the vehicle is located is smaller than a specified threshold value, if the current speed of the vehicle exceeds a specified multiple of the speed limit value of the road where the vehicle is located, determining that the vehicle is suspected to overspeed currently;
and when the speed limit value of the road where the vehicle is located is greater than or equal to the specified threshold value, if the current speed of the vehicle is greater than or equal to the specified threshold value, determining that the vehicle is suspected to overspeed currently.
4. The method of claim 1, wherein after receiving current position information and speed information of a vehicle, determining a speed limit value of a road on which the vehicle is currently located according to the position information and a preset road data set, further comprises:
filtering non-compliance data in the position information and the speed information; the non-compliance data includes: the longitude or the latitude in the position information is zero or does not belong to the Chinese range, the speed information received twice continuously comprises a flameout state and a stop state, the position information received twice continuously deviates by more than or equal to a specified distance, and the time interval between the two times of receiving the position information continuously is more than specified time.
5. The method of claim 3, wherein the vehicle includes a retarder device, the method further comprising, after determining that the vehicle is speeding:
and sending an opening instruction to the speed slowing device to enable the speed slowing device to decelerate the vehicle until the speed of the vehicle is reduced below a specified speed.
6. The method of claim 1, wherein the vehicle further comprises a voice module, and after determining whether the vehicle is currently suspected to overspeed according to the speed information and the speed limit value, the method further comprises:
and sending a voice reminding instruction to the voice module to enable the voice module to send out speed-reducing driving voice reminding.
7. An overspeed detecting device for trucks, characterized in that it comprises:
the data processing module is used for receiving the current position information and speed information of a vehicle and determining the speed limit value of the road where the vehicle is located according to the position information and a preset road data set;
the first overspeed judging module is used for judging whether the vehicle is suspected to overspeed or not according to the speed information and the speed limit value;
the time determining module is used for determining the time interval between the time for carrying out overspeed detection again and the current moment if the vehicle is suspected to overspeed currently;
and the secondary overspeed judgment module is used for updating the speed information and the speed limit value after the time interval is reached, judging whether the vehicle is suspected to overspeed or not again, and determining that the vehicle is overspeed if the vehicle is determined to be overspeed again.
8. A truck vehicle, characterized in that the vehicle is connected with the overspeed detecting apparatus for trucks of claim 7, and current position information and speed information of the vehicle are transmitted to the overspeed detecting apparatus for trucks at specified intervals for the overspeed detecting apparatus for trucks to overspeed detect the vehicle.
9. A van vehicle as claimed in claim 8, wherein the vehicle comprises a retarder, which is connected to the overspeed detection device for a van and decelerates the vehicle until it falls below a specified speed after receiving an activation command sent by the overspeed detection device for a van.
10. A van vehicle as claimed in claim 8, wherein the vehicle further comprises a voice module, the voice module is connected to the overspeed detection device for the van, and upon receiving a voice prompt instruction sent by the overspeed detection device for the van, issues a voice prompt for deceleration travel.
11. A truck system comprising the truck vehicle of claim 8, and further comprising the overspeed detection device for trucks of claim 7.
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