CN104034400B - Vehicle mass monitoring method and device - Google Patents

Abstract

Embodiments of the present invention provide a vehicle quality monitoring method and device, the device comprising: an acquisition unit for acquiring the driving speed and driving acceleration of the vehicle where the vehicle quality monitoring device is located; a calculation unit for communicating with the acquisition unit for Calculate the mass of the vehicle according to the driving speed and acceleration, and the pre-stored basic parameters of the vehicle, wherein the basic parameters of the vehicle include: vehicle drag coefficient, front projected area, air density of the road section where the vehicle is located, and rolling friction coefficient. In the present invention, the quality of the vehicle can be obtained during the running of the vehicle, which solves the problem of stopping at a fixed inspection point for detection of the vehicle quality, and improves the efficiency and flexibility of monitoring the vehicle quality.

Description

Vehicle quality monitoring method and device

technical field

The invention relates to communication technology, in particular to a vehicle quality monitoring method and device.

Background technique

For safety and road protection considerations, there are often certain restrictions on the load of the vehicle. At present, the relevant departments to detect whether the vehicle is overweight mainly rely on setting up fixed checkpoints, deploying large weighing facilities at the checkpoints, and stopping the vehicle for weighing when passing the checkpoints.

In the prior art, the methods for checking the quality of the inspection point mainly include: (1) The whole vehicle measurement method, that is, relying on a relatively large weighing platform, the vehicle is driven up and weighed as a whole. (2) Axle load measurement method, that is, to measure the axle load of each axle of the vehicle separately, and then calculate the mass of the whole vehicle by the weighing system.

However, using the existing technology, parking and weighing at the checkpoint will affect the overall traffic efficiency of vehicles and increase congestion, and the checkpoint is set at a fixed position, which will be artificially avoided by some vehicles and evade inspection. In addition, the installation and maintenance of large weighing platforms is costly and technically complex.

Contents of the invention

The invention provides a vehicle quality monitoring method and device, which are used to solve the problem that the vehicle needs to be weighed at a fixed place when monitoring the vehicle quality.

The first aspect of the present invention provides a vehicle quality monitoring device, comprising:

an acquisition unit, configured to acquire the driving speed and driving acceleration of the vehicle where the vehicle quality monitoring device is located;

a calculation unit, connected in communication with the acquisition unit, and used to calculate the mass of the vehicle according to the driving speed and acceleration, and the pre-stored basic parameters of the vehicle, wherein the basic parameters of the vehicle include: vehicle wind resistance coefficient, front positive The projected area, the air density of the road segment on which the vehicle is located, and the coefficient of rolling friction.

A second aspect of the present invention provides a vehicle quality monitoring method, comprising:

Obtain the driving speed and driving acceleration of the vehicle where the vehicle quality monitoring device is located;

Calculate the mass of the vehicle according to the driving speed and acceleration, and the pre-stored basic parameters of the vehicle, wherein the basic parameters of the vehicle include: vehicle drag coefficient, front projected area, air density of the road section where the vehicle is located, and rolling friction coefficient.

In the present invention, by obtaining the driving speed and acceleration of the vehicle, combined with the pre-stored basic parameters of the vehicle, the mass of the vehicle is calculated, so that the mass of the vehicle can be obtained during the operation of the vehicle, and it is solved that to obtain the mass of the vehicle, it must be fixed The problem of parking detection at checkpoints improves the efficiency and flexibility of monitoring vehicle quality.

Description of drawings

Fig. 1 is a structural schematic diagram of Embodiment 1 of a vehicle quality monitoring device provided by the present invention;

Fig. 2 is a structural schematic diagram of Embodiment 2 of the vehicle quality monitoring device provided by the present invention;

Fig. 3 is a structural schematic diagram of Embodiment 3 of the vehicle quality monitoring device provided by the present invention;

Fig. 4 is a structural schematic diagram of Embodiment 4 of the vehicle quality monitoring device provided by the present invention;

FIG. 5 is a schematic flowchart of Embodiment 1 of the vehicle quality monitoring method provided by the present invention.

detailed description

Fig. 1 is a schematic structural diagram of Embodiment 1 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:

The obtaining unit 101 is configured to obtain the driving speed and driving acceleration of the vehicle where the vehicle quality monitoring device is located. Generally, it is acquired in real time while the vehicle is running.

The calculation unit 102 is connected in communication with the acquisition unit 101, and is used to calculate the mass of the vehicle according to the above-mentioned driving speed and driving acceleration, as well as the pre-stored basic parameters of the vehicle.

Wherein, the basic parameters of the vehicle may include: the vehicle drag coefficient, the front orthographic area, the air density of the road section where the vehicle is located, and the rolling friction coefficient. These basic parameters of the vehicle can be pre-stored in the above-mentioned device, some of which can also be acquired in real time, which will be described in the following embodiments.

Specifically, after acquiring the driving speed and acceleration of the vehicle, combined with the pre-stored basic parameters of the vehicle, the mass of the vehicle can be calculated using existing calculation formulas. Then the quality can be sent to the background monitoring system through roadside equipment such as various communication base stations, so that the supervision department can know the quality of the vehicle, or the background monitoring system can request the above-mentioned vehicle quality monitoring device when it wants to know the quality of the vehicle. Get the mass of the vehicle.

In this embodiment, by obtaining the driving speed and acceleration of the vehicle, combined with the pre-stored basic parameters of the vehicle, the mass of the vehicle is calculated, and the mass of the vehicle can be obtained during the running of the vehicle. Fixed an issue with parking detection at checkpoints, improving the efficiency and flexibility of monitoring vehicle quality.

Fig. 2 is a schematic structural diagram of the second embodiment of the vehicle quality monitoring device provided by the present invention. On the basis of the embodiment in Fig. 1, as shown in Fig. The wireless communication network positioning system is communicatively connected, and is communicatively connected with the acquisition unit 101, for receiving the positioning information and time information of the above-mentioned vehicle sent by the satellite navigation system and/or the wireless communication network positioning system. The satellite navigation system may be a global positioning system. System (Global Positioning System, referred to as GPS), Beidou satellite navigation system and other existing satellite navigation systems. 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 above-mentioned satellite navigation and positioning system, wireless private network positioning system, and public mobile communication network positioning system can provide positioning raw data information and time information for the above-mentioned device. The above-mentioned positioning information can be longitude, latitude, elevation, time One or any combination of items.

The acquiring unit 101 calculates the driving speed and acceleration of the vehicle according to the positioning information and time information. That is, once the vehicle's position and travel time are known, the vehicle's travel speed and acceleration can be calculated using existing calculation formulas.

Fig. 3 is a structural schematic diagram of the third embodiment of the vehicle quality monitoring device provided by the present invention. On the basis of the above embodiments, in order to obtain more accurate speed and acceleration, as shown in Fig. 3, the device may also include: a speed sensor 301 and acceleration sensor 302, wherein:

The speed sensor 301 is connected in communication with the acquisition unit 101 and is used to detect the driving speed of the above-mentioned vehicle; the acceleration sensor 302 is connected in communication with the acquisition unit 101 and is used to detect the driving acceleration of the above-mentioned vehicle.

Then, the acquisition unit 101 is configured to receive the driving speed of the vehicle sent by the speed sensor 301 and the acceleration of the vehicle sent by the acceleration sensor 302 . In this way, the speed and acceleration of the vehicle can be obtained more quickly and more accurately.

In this case, the above-mentioned device may also include a positioning unit 103, which is communicatively connected with the satellite navigation system and/or wireless communication network positioning system, and communicatively connected with the above-mentioned acquisition unit 101, for receiving satellite navigation system and/or wireless communication The positioning information and time information of the above-mentioned vehicles sent by the network positioning system. The positioning information obtained at this time is mainly used to judge the validity of the velocity and acceleration measurement points.

Fig. 4 is a schematic structural diagram of Embodiment 4 of the vehicle quality monitoring device provided by the present invention. On the basis of the above embodiments, 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 communicatively connected with the positioning unit 103 and the acquisition unit 101, and is communicatively connected with the wireless communication unit 402. Before the parameter calculation of the mass of the vehicle, an effective measurement point for obtaining the above-mentioned driving speed and acceleration is determined according to the above-mentioned driving speed, driving acceleration and positioning information. In the second way, the central processing unit 401 is used to send the positioning information of the above-mentioned vehicle to the A background monitoring system, so that the background monitoring system can determine an effective measurement point for obtaining the above-mentioned driving speed and driving acceleration according to the above-mentioned driving speed, driving acceleration and positioning information.

It should be noted that the effective measurement point is a measurement point where the gradient is 0 and the traction force on the vehicle is 0. That is, in order to ensure the accuracy of the calculated vehicle mass, it is generally chosen to use the data detected on the straight road (that is, the road with a slope of 0) for calculation, and it must be at the measurement point where the traction force is 0, so that the subsequent calculation of the mass The influence of traction force can be neglected, and only rolling friction and resistance are considered.

The difference between the above two methods is that the main body for determining the effective measurement point is different. In the first method, the vehicle quality monitoring device itself determines, that is, the vehicle quality monitoring device can determine the measurement point where the traction force is 0 according to the speed and acceleration curves. Generally, the measurement point where the traction force is 0 during the driving process of the vehicle is the position where the vehicle is at the moment of shifting gears, or the position where the vehicle is in neutral. In addition, the road condition of each road section can be pre-stored in the vehicle quality monitoring device, and the road condition of the corresponding road section can be inquired according to the positioning information of a certain measurement point received by the positioning unit 103. If it is not a straight road, that is, the slope is not 0, then determine The measurement point on this road section is an invalid measurement point, that is, the data obtained on this road section (such as positioning information and time information, or speed, acceleration) is not used to calculate the mass of the vehicle, or the calculated vehicle quality data is discarded. If the positioning information of two short-distance locations is received, it can be judged whether there is a slope according to the elevation value in the positioning information. If the elevation changes, there is a slope, and the data obtained in this section (such as positioning information and time information) will not be used. , or speed, acceleration) to calculate the mass of the vehicle, or discard the calculated vehicle mass data. If the measurement point is on a straight road, and the speed and acceleration are obtained at the moment of vehicle shifting or when the vehicle is in neutral, then it is determined that the measurement point is a valid measurement point. In the second method, similar to the first method, it is only completed by the background monitoring system, and the background monitoring system can also use the same method to determine the measurement point where the traction force is 0 according to the speed and acceleration curves. The background monitoring system can also pre-store the road conditions of each road section. After receiving the positioning information sent by the above-mentioned device, the road conditions of the corresponding road section can be queried according to the positioning information. If it is not a straight road, that is, the slope is not 0, then determine The measurement point on this road section is an invalid measurement point, notify the above-mentioned device not to use the data (such as positioning information and time information, or speed, acceleration) obtained from the measurement point on this road section to calculate the mass of the vehicle, or notify the above-mentioned device to calculate The output vehicle mass data is discarded. If the positioning information of two short-distance positions is received, it can be judged whether there is a slope according to the elevation value in the positioning information. If the elevation changes, there is a slope, and the above-mentioned device is notified not to use the data obtained by the measurement point on this road section (such as positioning information and time information, or speed, acceleration) to calculate the mass of the vehicle, or notify the above-mentioned device to discard the calculated vehicle mass data. If the measurement point is on a straight road, and the speed and acceleration are obtained at the moment of vehicle shifting or when the vehicle is in neutral, then it is determined that the measurement point is a valid measurement point.

The above-mentioned wireless communication unit 402 can communicate with the roadside equipment, and send the above-mentioned positioning information to the background monitoring system through the roadside equipment, and the above-mentioned roadside equipment can include a wireless private network communication base station. The wireless communication unit 402 can also be used to send the vehicle mass calculated by the above device to the background monitoring system, so that the background monitoring system can know the mass of the vehicle and detect whether the vehicle is overweight.

It should be noted that when the traction force on the vehicle is 0, the main forces on the vehicle on a straight road include: wind resistance and rolling friction, that is, the resultant force on the vehicle is the sum of wind resistance and rolling friction . _The calculation formula of wind resistance F1 is Wherein C is the drag coefficient of the vehicle, S is the front orthographic area of the vehicle, ρ is the air density of the road section where the vehicle is located, and v is the driving speed of the vehicle at that time. Rolling friction force F ₂ =mgμ, where m is the mass of the vehicle, μ is the rolling friction coefficient, and g is the gravitational acceleration. Apply the Newtonian mechanics formula F=ma, where F is the resultant force on the vehicle, F=F ₁ +F ₂ , namely

Further, when the calculation unit 102 specifically calculates the vehicle mass, it may adopt a two-point calculation method, that is, select the driving speed and acceleration of the vehicle obtained at two effective measurement points for calculation. In a specific implementation process, the acquisition unit 101 acquires the driving speed and acceleration of the vehicle at two effective measurement points. Correspondingly, the calculation unit 102 is specifically used to adopt the formula Calculate the mass m of the vehicle, where C is the drag coefficient of the vehicle, S is the front orthographic area of the vehicle, ρ is the air density of the road section where the vehicle is located, v1 is the vehicle's _first effective The driving speed of the measuring point, v2 is the driving speed of the vehicle at the _second effective measuring point, a1 is the driving acceleration of the vehicle at the _first effective measuring point, and a2 is the driving speed of the vehicle at the _second effective measuring point driving acceleration. Specifically, according to the foregoing deduction, Since the rolling friction force does not change much in a short distance, the rolling friction force at the two measurement points is the same by default, and the formula (1) for the first measurement point can be obtained ${\mathrm{ma}}_1=\frac{1}{2}{\mathrm{CS\ρv}}_1^2+\mathrm{mg\μ},$ and the formula (2) for the second measurement point ${\mathrm{ma}}_2=\frac{1}{2}\mathrm{CS}{\mathrm{\ρv}}_2^2+\mathrm{mg\μ},$ Subtracting formula (1) and formula (2), we can get In this way, the influence of rolling friction coefficient can be ignored, and the calculation result is more accurate.

In another case, when the calculation unit 102 specifically calculates the vehicle mass, it may use a single-point calculation method, that is, select an effective measurement point to obtain the vehicle's driving speed and acceleration for calculation. In a specific implementation process, the acquisition unit 101 acquires the driving speed and acceleration of the vehicle at an effective measurement point. Correspondingly, the calculation unit 102 is specifically used to adopt the formula Calculate the mass m of the vehicle, where C is the drag coefficient of the vehicle, S is the front orthographic area of the vehicle, ρ is the air density of the road section where the vehicle is located, and v is the effective The traveling speed of the measuring point, a is the traveling acceleration of the vehicle at the one effective measuring point, μ is the coefficient of rolling friction, and g is the acceleration of gravity. Specifically by the above formula Pushed down. Among them, the rolling friction coefficient μ is related to the road surface material, road condition, road surface dryness, air humidity, tire wear degree, and tire pressure, but the rolling friction coefficient μ generally changes very little, and it can be stored according to the standard value when pre-stored. It can also be stored by road section, that is, according to the mapping relationship between road section information and rolling friction force, the rolling friction force of the corresponding road section is stored, and when the vehicle mass is calculated, the corresponding rolling friction force is searched according to the positioning information obtained by the positioning unit 103 . If you want to improve the accuracy, you can also store the standard value of the rolling friction coefficient μ and the percentage of the rolling friction coefficient μ changing with the air humidity, install an air humidity sensor in the roadside equipment, obtain the air humidity in real time, and communicate with the vehicle when driving to the roadside equipment When within the range, the above-mentioned vehicle quality monitoring device can receive the air humidity sent by the roadside equipment through the above-mentioned wireless communication unit 401, or actively request the roadside equipment to obtain the air density, and calculate the current rolling friction coefficient according to the air humidity.

As shown in Figure 4, the above-mentioned device may also include: a density acquisition unit 402, which is communicatively connected with the above-mentioned calculation unit 102 and the wireless communication unit 401, and is used to obtain the air density sensor detected by the roadside equipment from the roadside equipment through the wireless communication unit 401. air density. Air density is related to the air temperature, humidity, and air pressure in the environment. It is similar to the aforementioned rolling friction, and generally does not change much. It can be stored according to the standard value when pre-storing. It can also be stored by road section, that is, according to the mapping relationship between road section information and rolling friction force, the air density of the corresponding road section is stored, and when calculating the vehicle mass, the corresponding air density is searched according to the positioning information obtained by the positioning unit 103 . If you want to improve the accuracy, you can also install an air density sensor in the roadside equipment to obtain the air density in real time. When the vehicle travels within the communication range of the roadside equipment, the above-mentioned vehicle quality monitoring device can receive the data sent by the roadside equipment through the wireless communication unit 401. The air density can also be actively requested from the roadside equipment to obtain the air density.

In this embodiment, by obtaining the driving speed and acceleration of the vehicle, combined with the pre-stored basic parameters of the vehicle, the mass of the vehicle is calculated, so that the mass of the vehicle can be obtained during the running of the vehicle without setting up a physical vehicle quality monitoring point , save a lot of cost, and improve the efficiency and flexibility of monitoring vehicle quality.

Fig. 5 is a schematic flow chart of Embodiment 1 of the vehicle quality monitoring method provided by the present invention. As shown in Fig. 5, the method includes:

S501. Obtain the driving speed and driving acceleration of the vehicle where the vehicle quality monitoring device is located.

S502. Calculate the mass of the vehicle according to the above-mentioned driving speed and driving acceleration of the vehicle and the pre-stored basic parameters of the vehicle. The above-mentioned basic parameters of the vehicle include: vehicle wind resistance coefficient, frontal projected area, air density of the road section where the vehicle is located, and rolling friction coefficient.

Further, the positioning information and time information of the vehicle sent by the satellite navigation system and/or the wireless communication network positioning system may also be received.

The above S501 may specifically be calculating the driving speed and acceleration of the above vehicle according to the above location information and time information.

The above S501 may also specifically detect the driving speed and driving acceleration of the vehicle. Specifically, a speed sensor and an acceleration sensor may be installed in the vehicle quality monitoring device to respectively detect the driving speed and driving acceleration of the vehicle. Of course, in this case, the positioning information and time information of the vehicle sent by the satellite navigation system and/or the wireless communication network positioning system may also be received, so as to judge whether the measuring point is valid.

It should be noted that before calculating the mass of the vehicle according to the vehicle's driving speed and acceleration and the pre-stored basic parameters of the vehicle, it may also be determined and acquired according to the driving speed, driving acceleration and the positioning information. Effective measurement points of driving speed and driving acceleration; or, the driving speed and driving acceleration, and the positioning information of the vehicle can also be sent to the background monitoring system, so that the background monitoring system can Acceleration and the positioning information determine an effective measurement point for obtaining the driving speed and driving acceleration.

The effective measurement point is a measurement point where the gradient is 0 and the traction force on the vehicle is 0.

In the specific implementation process, for the calculation of the vehicle mass, in one case, if the driving speed and acceleration of the vehicle are obtained at two effective measurement points. Then calculate the mass of the vehicle according to the driving speed and acceleration of the vehicle and the pre-stored basic parameters of the vehicle, specifically, using the formula Calculate the mass m of the vehicle, where C is the drag coefficient of the vehicle, S is the front orthographic area of the vehicle, ρ is the air density of the road section where the vehicle is located, v1 is the vehicle's _first effective The driving speed of the measuring point, v2 is the driving speed of the vehicle at the _second effective measuring point, a1 is the driving acceleration of the vehicle at the _first effective measuring point, and a2 is the driving speed of the vehicle at the _second effective measuring point driving acceleration.

In another case, if the traveling speed and acceleration of the vehicle are obtained at an effective measurement point. Then calculate the mass of the vehicle according to the driving speed and acceleration of the vehicle and the pre-stored basic parameters of the vehicle, specifically: using the formula Calculate the mass m of the vehicle, where C is the drag coefficient of the vehicle, S is the front orthographic area of the vehicle, ρ is the air density of the road section where the vehicle is located, and v is the effective The traveling speed of the measuring point, a is the traveling acceleration of the vehicle at the one effective measuring point, μ is the coefficient of rolling friction, and g is the acceleration of gravity.

Furthermore, the air density detected by the air density sensor in the roadside equipment can also be obtained to make the calculation result more accurate.

The above-mentioned method is the method executed by the device in the aforementioned device embodiment, and its implementation principle and technical effect are similar, and will not be repeated here.

Those of ordinary skill in the art can understand that all or part of the steps for implementing the above method embodiments can be completed by program instructions and related hardware. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps including the above-mentioned method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other various media that can store program codes.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (10)

1. A vehicle quality monitoring device, characterized in that, comprising: an acquisition unit, configured to acquire the driving speed and driving acceleration of the vehicle where the vehicle quality monitoring device is located; a calculation unit, connected in communication with the acquisition unit, and used to calculate the mass of the vehicle according to the driving speed and acceleration, and the pre-stored basic parameters of the vehicle, wherein the basic parameters of the vehicle include: vehicle wind resistance coefficient, front positive The projected area, the air density of the road section where the vehicle is located, and the coefficient of rolling friction; The positioning unit is communicatively connected with the satellite navigation system and/or the wireless communication network positioning system, and is communicatively connected with the acquisition unit, for receiving the positioning of the vehicle sent by the satellite navigation system and/or the wireless communication network positioning system Information and time information; Also includes: speed sensor, acceleration sensor, central processing unit, wireless communication unit, The speed sensor is communicatively connected with the acquisition unit, and is used to detect the driving speed of the vehicle; The acceleration sensor is communicatively connected to the acquisition unit, and is used to detect the driving acceleration of the vehicle; The acquiring unit is configured to calculate the traveling speed and acceleration of the vehicle according to the positioning information and the time information; or, the acquiring unit is configured to receive the traveling speed of the vehicle sent by the speed sensor speed, and receiving the traveling acceleration of the vehicle sent by the acceleration sensor; The central processing unit is communicatively connected with the positioning unit and the acquisition unit, and is communicatively connected with the wireless communication unit, and is used to calculate the Before the quality of the vehicle, according to the driving speed and driving acceleration, and the positioning information, determine the valid measurement points for obtaining the driving speed and driving acceleration; or, It is used to send the driving speed, driving acceleration and the positioning information to the background monitoring through the wireless communication unit before calculating the mass of the vehicle according to the driving speed, driving acceleration and pre-stored basic parameters of the vehicle system, so that the background monitoring system determines an effective measurement point for obtaining the driving speed and driving acceleration according to the driving speed and driving acceleration and the positioning information. 2 . The device according to claim 1 , wherein the effective measurement point is a measurement point where the gradient is 0 and the traction force on the vehicle is 0. 3 . 3. The device according to claim 2, characterized in that, the acquisition unit acquires the driving speed and acceleration of the vehicle at the two effective measurement points; correspondingly, The calculation unit is specifically used to adopt the formula Calculate the mass m of the vehicle, where C is the drag coefficient of the vehicle, S is the front orthographic area of the vehicle, ρ is the air density of the road section where the vehicle is located, and v1 is the vehicle's _first location. The driving speed of the effective measuring point, v2 is the driving speed of the vehicle at the _second effective measuring point, a1 is the driving acceleration of the vehicle at the _first effective measuring point, and _a2 is the driving speed of the vehicle at the first effective measuring point. Driving acceleration at the second said active measuring point. 4. The device according to claim 2, wherein the acquisition unit acquires the vehicle's driving speed and acceleration at one of the effective measurement points; correspondingly, The calculation unit is specifically used to adopt the formula Calculate the mass m of the vehicle, wherein C is the drag coefficient of the vehicle, S is the front orthographic area of the vehicle, ρ is the air density of the road section where the vehicle is located, and v is the air density of the vehicle at the one place. The driving speed of the effective measurement point, a is the driving acceleration of the vehicle at the one effective measurement point, μ is the coefficient of rolling friction, and g is the acceleration of gravity. 5. The device according to claim 3 or 4, further comprising: A density acquisition unit, connected in communication with the calculation unit and the wireless communication unit, configured to acquire the air density detected by the air density sensor in the roadside equipment from the roadside equipment through the wireless communication unit. 6. A vehicle quality monitoring method, characterized in that, comprising: Obtain the driving speed and driving acceleration of the vehicle where the vehicle quality monitoring device is located; Calculate the mass of the vehicle according to the driving speed and acceleration, and the pre-stored basic parameters of the vehicle, wherein the basic parameters of the vehicle include: vehicle drag coefficient, front projected area, air density of the road section where the vehicle is located, and rolling friction coefficient; receiving the positioning information and time information of the vehicle sent by the satellite navigation system and/or the wireless communication network positioning system; The acquisition of the running speed and acceleration of the vehicle where the vehicle quality monitoring device is located includes: calculating the traveling speed and acceleration of the vehicle according to the positioning information and the time information; detecting the traveling speed and traveling acceleration of the vehicle; Before the calculation of the mass of the vehicle according to the driving speed, the driving acceleration, and the pre-stored basic parameters of the vehicle, it also includes: According to the driving speed and driving acceleration, and the positioning information, determine an effective measurement point for obtaining the driving speed and driving acceleration; or, Send the driving speed, driving acceleration, and the positioning information to the background monitoring system, so that the background monitoring system determines and obtains the driving speed and driving acceleration according to the driving speed, driving acceleration, and the positioning information effective measurement points. 7 . The method according to claim 6 , wherein the effective measurement point is a measurement point where the gradient is 0 and the traction force on the vehicle is 0. 8 . 8. The method according to claim 7, characterized in that, if the traveling speed and the acceleration of the vehicle are obtained at the two effective measurement points; correspondingly, The calculating the mass of the vehicle according to the driving speed and acceleration of the vehicle and the pre-stored basic parameters of the vehicle includes: use the formula Calculate the mass m of the vehicle, where C is the drag coefficient of the vehicle, S is the front orthographic area of the vehicle, ρ is the air density of the road section where the vehicle is located, and v1 is the vehicle's _first location. The driving speed of the effective measuring point, v2 is the driving speed of the vehicle at the _second effective measuring point, a1 is the driving acceleration of the vehicle at the _first effective measuring point, and _a2 is the driving speed of the vehicle at the first effective measuring point. Driving acceleration at the second said active measuring point. 9. The method according to claim 7, wherein, if the traveling speed and the acceleration of the vehicle are obtained at one of the effective measurement points; correspondingly, The calculating the mass of the vehicle according to the driving speed and acceleration of the vehicle and the pre-stored basic parameters of the vehicle includes: use the formula Calculate the mass m of the vehicle, wherein C is the drag coefficient of the vehicle, S is the front orthographic area of the vehicle, ρ is the air density of the road section where the vehicle is located, and v is the air density of the vehicle at the one place. The driving speed of the effective measurement point, a is the driving acceleration of the vehicle at the one effective measurement point, μ is the coefficient of rolling friction, and g is the acceleration of gravity. 10. The method according to claim 8 or 9, further comprising: Obtain the air density detected by the air density sensor in the roadside equipment.