CN104034400B - Vehicle mass monitoring method and device - Google Patents
Vehicle mass monitoring method and device Download PDFInfo
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Abstract
The embodiment of the present invention provides a kind of vehicle mass monitoring method and device, and this device comprises: acquiring unit, for obtaining the travel speed of vehicle mass monitoring device place vehicle and the acceleration that travels; Computing unit, with described acquiring unit communication connection, for the quality with vehicle described in the vehicle Parameter Calculation of travelling acceleration and prestore according to described travel speed, wherein, described vehicle basic parameter comprises: atmospheric density and the coefficient of rolling friction in vehicle air resistance coefficient, headstock frontal projected area, section, vehicle place. In the present invention, realize the quality that can obtain vehicle in vehicle operating process, solved and will obtain the problem that vehicle mass must detect in the parking of fixing checkpoint, the efficiency and the flexibility that have improved monitor vehicle quality.
Description
Technical Field
The invention relates to a communication technology, in particular to a vehicle quality monitoring method and device.
Background
For safety and road protection, there is often a limit to the load of the vehicle. At present, whether the vehicle is overweight or not is mainly detected by related departments by setting a fixed check point, deploying a large weighing facility at the check point, and stopping the vehicle for weighing when the vehicle passes through the check point.
In the prior art, the quality detection method by checking points mainly comprises the following steps: (1) the whole vehicle metering mode is that the vehicle is driven to be weighed integrally by a relatively large weighing platform. (2) The axle weight measuring mode is that the axle weight of each axle of the vehicle is measured respectively, and then the whole vehicle mass is calculated by the weighing system.
However, in the prior art, parking and weighing at a check point can affect the overall traffic efficiency of the vehicle and increase congestion, and the check point is arranged at a fixed position and can be avoided by some vehicles to escape from the check. In addition, the installation and maintenance of large scale weighing platforms is costly and technically complex.
Disclosure of Invention
The invention provides a vehicle quality monitoring method and device, which are used for solving the problem that a vehicle needs to be weighed at a fixed place when the vehicle quality is monitored.
A first aspect of the invention provides a vehicle quality monitoring apparatus comprising:
the acquiring unit is used for acquiring the running speed and the running acceleration of the vehicle where the vehicle quality monitoring device is located;
the calculating unit is in communication connection with the acquiring unit and is used for calculating the mass of the vehicle according to the running speed and the running acceleration and pre-stored basic vehicle parameters, wherein the basic vehicle parameters comprise: the wind resistance coefficient of the vehicle, the forward projection area of the vehicle head, the air density of the road section where the vehicle is located and the rolling friction coefficient.
A second aspect of the invention provides a vehicle quality monitoring method, comprising:
acquiring the running speed and running acceleration of a vehicle where a vehicle quality monitoring device is located;
calculating the mass of the vehicle according to the running speed and the running acceleration and pre-stored basic vehicle parameters, wherein the basic vehicle parameters comprise: the wind resistance coefficient of the vehicle, the forward projection area of the vehicle head, the air density of the road section where the vehicle is located and the rolling friction coefficient.
According to the invention, the vehicle quality is calculated by acquiring the running speed and the acceleration of the vehicle and combining the vehicle basic parameters stored in advance, so that the vehicle quality can be acquired in the running process of the vehicle, the problem that the vehicle is stopped and detected at a fixed check point when the vehicle quality is acquired is solved, and the efficiency and the flexibility for monitoring the vehicle quality are improved.
Drawings
FIG. 1 is a schematic structural diagram of a first embodiment of a vehicle quality monitoring apparatus according to the present invention;
FIG. 2 is a schematic structural diagram of a second embodiment of a vehicle quality monitoring apparatus according to the present invention;
FIG. 3 is a schematic structural diagram of a third embodiment of a vehicle quality monitoring apparatus according to the present invention;
FIG. 4 is a schematic structural diagram of a fourth embodiment of a vehicle quality monitoring apparatus according to the present invention;
fig. 5 is a schematic flow chart of a vehicle quality monitoring method according to a first embodiment of the present invention.
Detailed Description
Fig. 1 is a schematic structural diagram of a first embodiment of a vehicle quality monitoring device provided by the present invention, as shown in fig. 1, the device includes: an acquisition unit 101 and a calculation unit 102, wherein:
an obtaining unit 101 is configured to obtain a running speed and a running acceleration of a vehicle in which the vehicle quality monitoring apparatus is located. The acquisition is generally performed in real time during the vehicle travel.
And the calculating unit 102 is in communication connection with the acquiring unit 101 and is used for calculating the mass of the vehicle according to the running speed and the running acceleration and the prestored basic parameters of the vehicle.
The vehicle basic parameters may include: the wind resistance coefficient of the vehicle, the forward projection area of the vehicle head, the air density of the road section where the vehicle is located and the rolling friction coefficient. These basic vehicle parameters may be stored in the above device in advance, and some of the parameters may also be acquired in real time, as described in the following embodiments.
Specifically, after the driving speed and the acceleration of the vehicle are obtained, the mass of the vehicle can be calculated by using the existing calculation formula by combining the prestored basic parameters of the vehicle. Then, the quality can be sent to a background monitoring system through roadside equipment such as various communication base stations, so that a supervision department can know the quality of the vehicle, and the background monitoring system can also request the vehicle quality monitoring device to acquire the quality of the vehicle when the quality of the vehicle is required to be known.
In the embodiment, the running speed and the acceleration of the vehicle are acquired, the mass of the vehicle is calculated by combining the vehicle basic parameters stored in advance, the mass of the vehicle can be acquired in the running process of the vehicle, the problem that the vehicle is stopped and detected at a fixed check point when the mass of the vehicle is acquired is solved, and the efficiency and the flexibility for monitoring the mass of the vehicle are improved.
Fig. 2 is a schematic structural diagram of a second embodiment of the vehicle quality monitoring device provided by the present invention, and based on the embodiment of fig. 1, as shown in fig. 2, the device may further include: the positioning unit 103 is in communication connection with the satellite navigation system and/or the wireless communication network positioning system, and in communication connection with the acquiring unit 101, and is configured to receive the positioning information and the time information of the vehicle sent by the satellite navigation system and/or the wireless communication network positioning system, where the satellite navigation system may be a Global Positioning System (GPS), a beidou satellite navigation system, or another existing satellite navigation system. The wireless communication network positioning system may include: a wireless private network communication network system and/or a public mobile communication network system. Any one of the satellite navigation positioning system, the private wireless network positioning system and the public mobile communication network positioning system can provide positioning raw data information and time information for the device, and the positioning information can be one or any combination of longitude, latitude, elevation and time.
The acquisition unit 101 calculates the traveling speed and acceleration of the vehicle based on the positioning information and the time information. Namely, the position and the running time of the vehicle are known, the running speed and the acceleration of the vehicle can be calculated by adopting the existing calculation formula.
Fig. 3 is a schematic structural diagram of a third embodiment of the vehicle quality monitoring device provided by the present invention, and on the basis of the above embodiment, in order to obtain more accurate speed and acceleration, as shown in fig. 3, the device may further include: a speed sensor 301 and an acceleration sensor 302, wherein:
a speed sensor 301, communicatively connected to the acquisition unit 101, for detecting a traveling speed of the vehicle; and an acceleration sensor 302, which is connected to the acquisition unit 101 in a communication manner, for detecting the running acceleration of the vehicle.
Then, the above-mentioned acquiring unit 101 is configured to receive the running speed of the vehicle sent by the speed sensor 301 and the acceleration of the vehicle sent by the acceleration sensor 302. By adopting the method, the speed and the acceleration of the vehicle can be acquired more quickly and more accurately.
In this case, the apparatus may also include a positioning unit 103, communicatively connected to the satellite navigation system and/or the wireless communication network positioning system, and communicatively connected to the acquiring unit 101, for receiving the positioning information and the time information of the vehicle sent by the satellite navigation system and/or the wireless communication network positioning system. The positioning information obtained at this time is mainly used for judging the validity of the speed and acceleration measurement points.
Fig. 4 is a schematic structural diagram of a fourth embodiment of the vehicle quality monitoring device provided by the present invention, and based on the above embodiment, as shown in fig. 4, the device may further include: a central processing unit 401 and a wireless communication unit 402, wherein the central processing unit 401 is connected with the positioning unit 103 and the obtaining unit 101 in a communication way, and is connected with the wireless communication unit 402 in a communication way, in the first mode, the central processing unit 401 is used for determining effective measuring points for obtaining the running speed and the acceleration according to the running speed and the running acceleration and the positioning information before calculating the mass of the vehicle according to the running speed and the running acceleration and the prestored basic parameters of the vehicle. In a second mode, the central processing unit 401 is configured to send the positioning information of the vehicle to the background monitoring system through the wireless communication unit 402 before calculating the mass of the vehicle according to the running speed and the running acceleration and the prestored basic parameters of the vehicle, so that the background monitoring system determines and obtains effective measurement points of the running speed and the running acceleration according to the running speed, the running acceleration and the positioning information.
It should be noted that the valid measurement point is a measurement point where the gradient is 0 and the traction force applied to the vehicle is 0. In order to ensure the accuracy of the calculated vehicle mass, the calculation is generally performed by using data detected on a straight road (i.e. on a road with a slope of 0), and the measurement point of the traction force must be at 0, so that the influence of the traction force can be ignored in the subsequent calculation of the mass, and only the rolling friction force and the resistance force are considered.
The difference between the two modes lies in that the main bodies for determining the effective measuring points are different, and in the first mode, the effective measuring points are determined by the vehicle quality monitoring device, namely the vehicle quality monitoring device can determine the measuring points with the traction force of 0 according to the speed and acceleration curve graphs, and the measuring points with the traction force of 0 are the positions of the vehicle at the shifting moment or the positions of the vehicle in the neutral gear during the driving process of the vehicle. In addition, the vehicle quality monitoring device may pre-store road conditions of each road segment, and may query the road condition of a corresponding road segment according to the positioning information of a certain measuring point received by the positioning unit 103, and if the road is not a straight road, that is, the slope is not 0, it is determined that the measuring point on the road segment is an invalid measuring point, that is, the vehicle quality is calculated without using data (for example, positioning information and time information, or speed and acceleration) acquired at the road segment, or the calculated vehicle quality data is discarded. If positioning information of two close-distance positions is received, whether a slope exists can be judged according to an elevation value in the positioning information, if the elevation changes, the slope exists, the mass of the vehicle is calculated without using data (such as the positioning information and time information, or speed and acceleration) acquired in the road section, or the calculated vehicle mass data is discarded. A measurement point is determined to be a valid measurement point if it is both on a straight road and is the speed and acceleration obtained at the instant of vehicle shift or when the vehicle is in neutral. In the second mode, similar to the first mode, the measurement is performed by a background monitoring system, and the background monitoring system may also determine the measurement point where the traction force is 0 according to the speed and acceleration curve graphs in the same manner. The background monitoring system may also prestore road conditions of each road section, after receiving the positioning information sent by the device, the background monitoring system may query the road conditions of the corresponding road section according to the positioning information, if the road is not a straight road, that is, the slope is not 0, determine that the measurement point on the road section is an invalid measurement point, notify the device not to calculate the quality of the vehicle by using the data (such as the positioning information and time information, or speed, acceleration) acquired by the measurement point on the road section, or notify the device to discard the calculated vehicle quality data. If positioning information of two close-distance positions is received, whether a slope exists can be judged according to an elevation value in the positioning information, if the elevation changes, the slope exists, the device is informed not to calculate the mass of the vehicle by using data (such as positioning information and time information, or speed and acceleration) acquired by a measuring point on the road section, or the device is informed to discard calculated vehicle mass data. A measurement point is determined to be a valid measurement point if it is both on a straight road and is the speed and acceleration obtained at the instant of vehicle shift or when the vehicle is in neutral.
The wireless communication unit 402 may be communicatively connected to a road side device, and transmit the positioning information to a background monitoring system through the road side device, where the road side device may include a wireless private network communication base station. The wireless communication unit 402 may also be configured to send the vehicle mass calculated by the foregoing device to a background monitoring system, so that the background monitoring system learns the vehicle mass and performs detection on whether the vehicle is overweight.
It should be noted that, in the case that the traction force applied to the vehicle is 0, the main stresses applied to the vehicle running on a straight road include: the resultant force of the wind resistance and the rolling friction force, namely the vehicle, is the sum of the wind resistance and the rolling friction force. Wind resistanceForce F1Is calculated by the formulaWherein C is the wind resistance coefficient of the vehicle, S is the forward projection area of the head of the vehicle, ρ is the air density of the road section where the vehicle is located, and v is the running speed of the vehicle at that time. Rolling friction force F2= mg μ, where m is the mass of the vehicle, μ is the rolling friction coefficient, and g is the gravitational acceleration. Applying Newton's mechanical formula F = ma, wherein F is the resultant force applied to the vehicle, and F = F1+F2I.e. by
Further, the calculating unit 102 may adopt a two-point calculation method, that is, the running speed and the acceleration of the vehicle obtained at two effective measuring points are selected for calculation when the vehicle mass is specifically calculated. In a specific implementation process, the obtaining unit 101 obtains the running speed and the acceleration of the vehicle at two effective measurement points. Accordingly, the calculation unit 102 is specifically configured to employ a formulaCalculating the mass m of the vehicle, wherein C is the wind resistance coefficient of the vehicle, S is the frontal projection area of the vehicle head, rho is the air density of the road section where the vehicle is located, v1For the speed, v, of the vehicle at the first effective measuring point2For the speed of the vehicle at the second effective measuring point, a1For the driving acceleration of the vehicle at the first effective measuring point, a2And the running acceleration of the vehicle at the second effective measuring point is obtained. In particular, according to the above-mentioned pushing down,since the rolling friction is not greatly changed in a short distance, the rolling friction is the same at two measurement points by default, and the formula (1) of the first measurement point can be obtained And formula (2) of the second measuring point Subtracting the formula (1) and the formula (2) to obtainTherefore, the influence of the rolling friction coefficient can be ignored, and the calculation result is more accurate.
Alternatively, the calculating unit 102 may adopt a single-point calculation method, that is, the running speed and the acceleration of the vehicle obtained by selecting one effective measuring point are calculated when the vehicle mass is specifically calculated. In a specific implementation process, the obtaining unit 101 obtains the running speed and the acceleration of the vehicle at an effective measurement point. Accordingly, the calculation unit 102 is specifically configured to employ a formulaCalculating the mass m of the vehicle, wherein C is a wind resistance coefficient of the vehicle, S is a forward projection area of a head of the vehicle, ρ is an air density of a road section where the vehicle is located, v is a running speed of the vehicle at the effective measurement point, a is a running acceleration of the vehicle at the effective measurement point, μ is a rolling friction coefficient, and g is a gravity acceleration. Is concretely represented by the formulaIs poured out to obtain the finished product. Wherein the coefficient of rolling friction muThe rolling friction coefficient mu is related to road surface material, road condition, road surface dryness, air humidity, tire wear degree and tire pressure, but the rolling friction coefficient mu generally has small change, and the rolling friction coefficient mu can be stored according to a standard value when being prestored. Or storing the road segments, that is, storing the rolling friction force of the corresponding road segment according to the mapping relationship between the road segment information and the rolling friction force, and searching the corresponding rolling friction force according to the positioning information acquired by the positioning unit 103 when calculating the vehicle mass. If the precision is to be improved, the standard value of the rolling friction coefficient μ and the percentage of the rolling friction coefficient μ changing with the air humidity can be stored, an air humidity sensor is installed in the road side equipment to obtain the air humidity in real time, and when the vehicle runs into the communication range of the road side equipment, the vehicle quality monitoring device can receive the air humidity sent by the road side equipment through the wireless communication unit 401, and can also actively request the road side equipment to obtain the air density and calculate the current rolling friction coefficient according to the air humidity.
As shown in fig. 4, the apparatus may further include: and a density acquisition unit 402, communicatively connected to the calculation unit 102 and the wireless communication unit 401, for acquiring the air density detected by the air density sensor in the roadside device to the roadside device through the wireless communication unit 401. The air density is related to the air temperature, humidity and air pressure in the environment, is similar to the rolling friction force, generally has small change, and can be stored according to a standard value when being prestored. Or storing the air density of the corresponding road section according to the mapping relationship between the road section information and the rolling friction force, and searching the corresponding air density according to the positioning information acquired by the positioning unit 103 when calculating the vehicle mass. If the precision is to be improved, an air density sensor may be installed in the roadside device to obtain the air density in real time, and when the vehicle runs into the communication range of the roadside device, the vehicle quality monitoring device may receive the air density sent by the roadside device through the wireless communication unit 401, or may actively request the roadside device to obtain the air density.
In the embodiment, the running speed and the acceleration of the vehicle are acquired, the mass of the vehicle is calculated by combining the prestored basic parameters of the vehicle, the mass of the vehicle can be acquired in the running process of the vehicle, an entity vehicle mass monitoring point does not need to be set, a large amount of cost is saved, and the efficiency and the flexibility for monitoring the mass of the vehicle are improved.
Fig. 5 is a schematic flowchart of a first embodiment of a vehicle quality monitoring method according to the present invention, and as shown in fig. 5, the method includes:
s501, obtaining the running speed and the running acceleration of the vehicle where the vehicle quality monitoring device is located.
And S502, calculating the mass of the vehicle according to the running speed and the running acceleration of the vehicle and the prestored basic parameters of the vehicle. The basic vehicle parameters include: the wind resistance coefficient of the vehicle, the forward projection area of the vehicle head, the air density of the road section where the vehicle is located and the rolling friction coefficient.
Further, the positioning information and the time information of the vehicle sent by a satellite navigation system and/or a wireless communication network positioning system can be received.
The step S501 may specifically be calculating the running speed and the acceleration of the vehicle according to the positioning information and the time information.
The step S501 may be to detect the running speed and the running acceleration of the vehicle, and specifically, may be to install a speed sensor and an acceleration sensor in the vehicle quality monitoring device to detect the running speed and the running acceleration of the vehicle, respectively. Of course, in this case, the positioning information and the time information of the vehicle sent by the satellite navigation system and/or the wireless communication network positioning system may also be received to be used for determining whether the measurement point is valid.
It should be noted that before calculating the mass of the vehicle according to the running speed and acceleration of the vehicle and the prestored basic parameters of the vehicle, an effective measurement point for acquiring the running speed and the running acceleration can be determined according to the running speed and the running acceleration and the positioning information; or, the running speed, the running acceleration and the positioning information of the vehicle can be sent to a background monitoring system, so that the background monitoring system determines and acquires effective measurement points of the running speed and the running acceleration according to the running speed, the running acceleration and the positioning information.
The effective measurement point is a measurement point where the gradient is 0 and the traction force to which the vehicle is subjected is 0.
In the concrete implementation process, for the calculation of the vehicle mass, in one case, if the running speed and the acceleration of the vehicle are obtained at two effective measurement points. Calculating the mass of the vehicle according to the running speed and the acceleration of the vehicle and the prestored basic parameters of the vehicle, specifically adopting a formulaCalculating the mass m of the vehicle, wherein C is the wind resistance coefficient of the vehicle, S is the frontal projection area of the vehicle head, rho is the air density of the road section where the vehicle is located, v1For the speed, v, of the vehicle at the first effective measuring point2For the speed of the vehicle at the second effective measuring point, a1For the driving acceleration of the vehicle at the first effective measuring point, a2And the running acceleration of the vehicle at the second effective measuring point is obtained.
In another case, the driving speed and acceleration of the vehicle are obtained at a valid measurement point. Calculating the mass of the vehicle according to the running speed and the acceleration of the vehicle and pre-stored basic parameters of the vehicle, specifically: using a formulaCalculating the mass m of the vehicle, wherein C is the wind resistance coefficient of the vehicle, S is the frontal projection area of the vehicle head, ρ is the air density of the road section where the vehicle is located, and v is the effective measuring point of the vehicle at the effective measuring pointA is the running acceleration of the vehicle at the one effective measurement point, μ is the rolling friction coefficient, and g is the gravitational acceleration.
Further, the air density detected by the air density sensor in the roadside apparatus may also be acquired to make the calculation result more accurate.
The method is a method performed by the device in the embodiment of the device, and the implementation principle and the technical effect are similar, and are not described herein again.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A vehicle quality monitoring device, comprising:
the acquiring unit is used for acquiring the running speed and the running acceleration of the vehicle where the vehicle quality monitoring device is located;
the calculating unit is in communication connection with the acquiring unit and is used for calculating the mass of the vehicle according to the running speed and the running acceleration and pre-stored basic vehicle parameters, wherein the basic vehicle parameters comprise: the wind resistance coefficient of the vehicle, the forward projection area of the vehicle head, the air density of a road section where the vehicle is located and the rolling friction coefficient;
the positioning unit is in communication connection with a satellite navigation system and/or a wireless communication network positioning system, is in communication connection with the acquisition unit, and is used for receiving the positioning information and the time information of the vehicle, which are sent by the satellite navigation system and/or the wireless communication network positioning system;
further comprising: a speed sensor, an acceleration sensor, a central processing unit and a wireless communication unit,
the speed sensor is in communication connection with the acquisition unit and is used for detecting the running speed of the vehicle;
the acceleration sensor is in communication connection with the acquisition unit and is used for detecting the running acceleration of the vehicle;
the acquisition unit is used for calculating the running speed and the acceleration of the vehicle according to the positioning information and the time information; or, the acquiring unit is configured to receive the running speed of the vehicle sent by the speed sensor and receive the running acceleration of the vehicle sent by the acceleration sensor;
the central processing unit is in communication connection with the positioning unit and the acquisition unit, is in communication connection with the wireless communication unit, and is used for determining effective measurement points for acquiring the running speed and the running acceleration according to the running speed and the running acceleration and the positioning information before calculating the mass of the vehicle according to the running speed and the running acceleration and prestored basic parameters of the vehicle; or,
the system is used for sending the running speed, the running acceleration and the positioning information to a background monitoring system through the wireless communication unit before calculating the mass of the vehicle according to the running speed, the running acceleration and prestored basic parameters of the vehicle, so that the background monitoring system determines and acquires effective measuring points of the running speed and the running acceleration according to the running speed, the running acceleration and the positioning information.
2. The apparatus of claim 1, wherein the valid measurement point is a measurement point where grade is 0 and the vehicle is subject to traction of 0.
3. The apparatus according to claim 2, characterized in that the acquisition unit acquires the running speed and acceleration of the vehicle at two of the effective measurement points; accordingly, the number of the first and second electrodes,
the computing unit is specifically configured to employ a formulaCalculating the mass m of the vehicle, wherein C is the wind resistance coefficient of the vehicle, S is the frontal projection area of the vehicle head, rho is the air density of the road section where the vehicle is located, v1For the speed, v, of the vehicle at the first effective measuring point2For the speed of travel of the vehicle at the second effective measurement point, a1For the running acceleration, a, of the vehicle at the first effective measuring point2And the running acceleration of the vehicle at the second effective measuring point is obtained.
4. The apparatus according to claim 2, wherein the acquisition unit acquires a running speed and an acceleration of the vehicle at one of the effective measurement points; accordingly, the number of the first and second electrodes,
the computing unit is specifically configured to employ a formulaCalculating the mass m of the vehicle, wherein C is the wind resistance coefficient of the vehicle, S is the forward projection area of the head of the vehicle, ρ is the air density of the road section where the vehicle is located, v is the running speed of the vehicle at the effective measuring point, a is the running acceleration of the vehicle at the effective measuring point, μ is the rolling friction coefficient, and g is the gravity acceleration.
5. The apparatus of claim 3 or 4, further comprising:
and the density acquisition unit is in communication connection with the calculation unit and the wireless communication unit and is used for acquiring the air density detected by the air density sensor in the road side equipment from the road side equipment through the wireless communication unit.
6. A vehicle quality monitoring method, characterized by comprising:
acquiring the running speed and running acceleration of a vehicle where a vehicle quality monitoring device is located;
calculating the mass of the vehicle according to the running speed and the running acceleration and pre-stored basic vehicle parameters, wherein the basic vehicle parameters comprise: the wind resistance coefficient of the vehicle, the forward projection area of the vehicle head, the air density of a road section where the vehicle is located and the rolling friction coefficient;
receiving positioning information and time information of the vehicle, which are sent by a satellite navigation system and/or a wireless communication network positioning system;
the method for acquiring the running speed and the acceleration of the vehicle where the vehicle quality monitoring device is located comprises the following steps:
calculating the running speed and acceleration of the vehicle according to the positioning information and the time information;
detecting a running speed and a running acceleration of the vehicle;
before calculating the mass of the vehicle according to the running speed, the running acceleration and the prestored basic parameters of the vehicle, the method further comprises the following steps:
determining and acquiring effective measuring points of the running speed and the running acceleration according to the running speed and the running acceleration and the positioning information; or,
and sending the running speed, the running acceleration and the positioning information to a background monitoring system so that the background monitoring system determines and acquires effective measuring points of the running speed and the running acceleration according to the running speed, the running acceleration and the positioning information.
7. The method of claim 6, wherein the valid measurement point is a measurement point where grade is 0 and the vehicle is experiencing traction of 0.
8. The method according to claim 7, characterized in that if the driving speed and acceleration of the vehicle are obtained at two of the effective measurement points; accordingly, the number of the first and second electrodes,
the calculating the mass of the vehicle according to the running speed and the acceleration of the vehicle and the prestored basic parameters of the vehicle comprises the following steps:
using a formulaCalculating the mass m of the vehicle, wherein C is the wind resistance coefficient of the vehicle, S is the frontal projection area of the vehicle head, rho is the air density of the road section where the vehicle is located, v1For the speed, v, of the vehicle at the first effective measuring point2For the speed of travel of the vehicle at the second effective measurement point, a1For the running acceleration, a, of the vehicle at the first effective measuring point2And the running acceleration of the vehicle at the second effective measuring point is obtained.
9. The method of claim 7, wherein if the speed and acceleration of the vehicle are obtained at one of the valid measurement points; accordingly, the number of the first and second electrodes,
the calculating the mass of the vehicle according to the running speed and the acceleration of the vehicle and the prestored basic parameters of the vehicle comprises the following steps:
using a formulaCalculating the mass m of the vehicle, wherein C is the wind resistance coefficient of the vehicle, S is the forward projection area of the head of the vehicle, ρ is the air density of the road section where the vehicle is located, and v is the line of the vehicle at the effective measuring pointThe driving speed, a is the driving acceleration of the vehicle at the effective measuring point, mu is the rolling friction coefficient, and g is the gravity acceleration.
10. The method of claim 8 or 9, further comprising:
and acquiring the air density detected by the air density sensor in the roadside equipment.
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| CN201310364599.2A CN104034400B (en) | 2013-08-20 | 2013-08-20 | Vehicle mass monitoring method and device |
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| WO2016074600A1 (en) * | 2014-11-11 | 2016-05-19 | 冯春魁 | Vehicle operation monitoring, overseeing, data processing and overload monitoring method and system |
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| CN109374098A (en) * | 2018-10-10 | 2019-02-22 | 无锡圣普电力科技有限公司 | A kind of measurement method of electric vehicle weight |
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