CN113607251A - Vehicle load measuring method and device - Google Patents
Vehicle load measuring method and device Download PDFInfo
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- CN113607251A CN113607251A CN202110764393.3A CN202110764393A CN113607251A CN 113607251 A CN113607251 A CN 113607251A CN 202110764393 A CN202110764393 A CN 202110764393A CN 113607251 A CN113607251 A CN 113607251A
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- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/08—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for incorporation in vehicles
- G01G19/086—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for incorporation in vehicles wherein the vehicle mass is dynamically estimated
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Abstract
The invention discloses a method and a device for measuring the load of a vehicle, wherein the method comprises the following steps: setting a first parameter of the vehicle to be tested according to the model of the vehicle to be tested; controlling the speed of the vehicle to be tested to reach a preset speed interval, acquiring a message from a vehicle-mounted CAN bus according to a preset sampling interval, and acquiring a second parameter according to the message; acquiring a third parameter of a road traveled by the vehicle to be detected from the vehicle-mounted CAN bus by combining a vehicle-mounted electronic map at a preset sampling interval; and carrying out digital filtering on the second parameter and the third parameter, and calculating the load value of the vehicle to be measured by combining the digitally filtered second parameter and third parameter with the first parameter. According to the embodiment of the invention, a plurality of vehicle-mounted bus data of the vehicle to be measured are used as the calculation basis for measuring the load, so that the load is measured without carrying out multiple times of calibration according to different vehicle types and installing the strain gauge on the frame, the method and the device are suitable for various vehicle types, the measurement efficiency is improved, and the test accuracy of the load of the vehicle is effectively improved.
Description
Technical Field
The invention relates to the technical field of load detection, in particular to a vehicle load measuring method and device.
Background
In the current vehicle load measurement, a strain gauge is installed near a suspension of a vehicle, under different load conditions, the strain gauge deforms differently to change the resistance characteristic of the strain gauge attached to the load, and the strain gauge is connected to a bridge measurement circuit to obtain different voltage outputs so as to represent different load data. However, the existing vehicle load measuring method needs to install the strain gauge on the vehicle frame, and the performance of the strain gauge is rapidly reduced or even damaged under the naked environment, which finally results in that the vehicle load measuring error is too large or the vehicle load cannot be measured.
Disclosure of Invention
The invention provides a vehicle load measuring method and device, and aims to solve the problem that the load measuring error of a vehicle is too large or cannot be measured due to the fact that the performance of a strain gauge of the conventional vehicle load measuring method is easy to damage.
One embodiment of the present invention provides a vehicle load measuring method, including:
setting a first parameter of a vehicle to be tested according to the model of the vehicle to be tested, restarting the vehicle to be tested, and loading the first parameter, wherein the first parameter comprises the transmission ratio of a main speed reducer, the radius of wheels, the air resistance coefficient, the windward area, the conversion coefficient of the rotating mass of the vehicle and the mechanical efficiency of a transmission system;
controlling the speed of the vehicle to be tested to reach a preset speed interval, acquiring a message from a vehicle-mounted CAN bus according to a preset sampling interval, and acquiring a second parameter according to the message, wherein the second parameter comprises engine output torque, running speed, running acceleration and transmission ratio of a transmission;
acquiring a third parameter of the road on which the vehicle to be detected runs from the vehicle-mounted CAN bus by combining the vehicle-mounted electronic map at the preset sampling interval, wherein the third parameter comprises a rolling resistance coefficient and a slope angle;
and carrying out digital filtering on the second parameter and the third parameter, and calculating the load value of the vehicle to be measured by combining the digitally filtered second parameter and the digitally filtered third parameter with the first parameter.
Further, the calculating the load value of the vehicle to be measured by combining the digitally filtered second parameter and the digitally filtered third parameter with the first parameter specifically includes:
combining the digitally filtered second parameter and the digitally filtered third parameter with the first parameter to obtain a driving equation:
wherein, TtqIs the output torque of the engine, igTo the transmission ratio of the variator, ioIs the transmission ratio of the main speed reducer, eta is the mechanical efficiency of the transmission system, r is the radius of the wheel, m is the load value of the vehicle to be measured, g is the gravity acceleration, f is the rolling resistance coefficient, alpha is the slope angle, CDIs the coefficient of air resistance, A is the frontal area, uaThe method comprises the following steps of (1) taking the running speed as a, taking a as the running acceleration and taking delta as the conversion coefficient of the rotating mass of the automobile as delta;
and calculating the load value of the vehicle to be measured according to the running equation and the values of the first parameter, the second parameter and the third parameter.
Further, the second parameter and the third parameter are digitally filtered by an arithmetic mean filtering method.
Further, the second parameter and the third parameter are digitally filtered using a median filtering method.
Further, the difference value between the current running speed of the vehicle to be tested and the running speed of the last sampling interval is divided by the preset sampling interval to calculate the running acceleration of the vehicle to be tested.
Further, the interval of the preset sampling interval is 0.01 second to 0.1 second.
Further, the preset vehicle speed interval is 35 km/h to 45 km/h.
Another embodiment of the present invention provides a vehicle load measuring device, including:
the first parameter loading module is used for setting a first parameter of the vehicle to be tested according to the model of the vehicle to be tested, restarting the vehicle to be tested and loading the first parameter, wherein the first parameter comprises the transmission ratio of a main speed reducer, the radius of wheels, the air resistance coefficient, the windward area, the conversion coefficient of the rotating mass of the automobile and the mechanical efficiency of a transmission system;
the second parameter acquisition module is used for controlling the speed of the vehicle to be detected to reach a preset speed interval, acquiring a message from a vehicle-mounted CAN bus according to a preset sampling interval, and acquiring a second parameter according to the message, wherein the second parameter comprises engine output torque, driving speed, driving acceleration and transmission ratio of a transmission;
the third parameter acquisition module is used for acquiring a third parameter of a road driven by the vehicle to be detected from the vehicle-mounted CAN bus by combining a vehicle-mounted electronic map at the preset sampling interval, wherein the third parameter comprises a rolling resistance coefficient and a slope angle;
and the vehicle load calculation module is used for carrying out digital filtering on the second parameter and the third parameter and calculating the load value of the vehicle to be measured by combining the digitally filtered second parameter and the digitally filtered third parameter with the first parameter.
According to the embodiment of the invention, a plurality of vehicle-mounted bus data of the vehicle to be tested are used as the calculation basis for measuring the measured load, the relational expression of the vehicle-mounted bus data and the vehicle load value is established through the first parameter, the second parameter and the third parameter, the load value of the vehicle to be tested is calculated based on the relational expression, multiple times of calibration according to different vehicle types is not needed, the method is applicable to various vehicle types, the measurement efficiency can be improved, and the test accuracy of the vehicle load can be effectively improved; according to the embodiment of the invention, the load measurement is carried out without installing the strain gauge on the frame, so that the problem that the measurement error is too large or the measurement cannot be carried out due to the performance reduction or damage of the strain gauge can be avoided, and the reliability and the stability of the load measurement can be effectively improved.
Drawings
FIG. 1 is a schematic flow chart of a method for measuring vehicle load according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a vehicle load measuring device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Referring to fig. 1, in a first embodiment of the present invention, there is provided a vehicle load measuring method as shown in fig. 1, including:
s1, setting a first parameter of the vehicle to be tested according to the model of the vehicle to be tested, restarting the vehicle to be tested, and loading the first parameter, wherein the first parameter comprises the transmission ratio of a main speed reducer, the radius of wheels, the air resistance coefficient, the windward area, the conversion coefficient of the rotating mass of the automobile and the mechanical efficiency of a transmission system;
optionally, the vehicle body structures, the wheel sizes, the transmission systems, the power devices and other parameters of vehicles of different models are different, different parameters have different influences on subsequent calculation of the load of the vehicle, and in order to improve the accuracy and reliability of the subsequent calculation of the load of the vehicle, the first parameter is set according to the model of the vehicle to be measured. After the first parameter is set, in order to enable the fixed program with updated parameters to load the set first parameter, the embodiment of the invention restarts the vehicle to be tested, and after the vehicle to be tested is restarted, the data on the RAM of the vehicle to be tested is automatically emptied, and the set first parameter is reloaded.
In a specific implementation manner, the vehicle to be tested according to the embodiment of the invention is a commercial vehicle.
S2, controlling the speed of the vehicle to be tested to reach a preset speed interval, acquiring a message from the vehicle-mounted CAN bus according to a preset sampling interval, and acquiring a second parameter according to the message, wherein the second parameter comprises engine output torque, driving speed, driving acceleration and transmission ratio of a transmission;
optionally, in order to enable the engine to be tested under a stable working condition, the embodiment of the invention enables the operating condition and the output torque of the engine to be stable by controlling the speed of the vehicle to be tested to reach the preset speed range, so that the accuracy of the obtained second parameter can be effectively improved, and the accuracy and the stability of subsequent vehicle load calculation can be improved.
S3, acquiring a third parameter of a road on which a vehicle to be detected runs from a vehicle-mounted CAN bus by combining a vehicle-mounted electronic map at a preset sampling interval, wherein the third parameter comprises a rolling resistance coefficient and a slope angle;
the vehicle-mounted electronic map comprises the specific road condition of the vehicle to be detected on the road to be driven, and has a GPS positioning function.
And S4, carrying out digital filtering on the second parameter and the third parameter, and combining the digitally filtered second parameter and third parameter with the first parameter to calculate the load value of the vehicle to be measured.
In the embodiment of the invention, the second parameter and the third parameter are filtered by adopting a digital filtering mode, so that the influence of interference or noise on the parameters can be effectively eliminated, the precision and the reliability of parameter acquisition are improved, and the precision and the reliability of vehicle load measurement can be improved.
As a specific implementation manner of the embodiment of the present invention, the load value of the vehicle to be measured is calculated by combining the digitally filtered second parameter and the digitally filtered third parameter with the first parameter, and specifically:
combining the digitally filtered second parameter and the digitally filtered third parameter with the first parameter to obtain a driving equation:
wherein, TtqIs the output torque of the engine, igTo the transmission ratio of the variator, ioIs the transmission ratio of the main speed reducer, eta is the mechanical efficiency of the transmission system, r is the radius of the wheel, m is the load value of the vehicle to be measured, g is the gravity acceleration, f is the rolling resistance coefficient, alpha is the slope angle, CDIs the coefficient of air resistance, A is the frontal area, uaThe method comprises the following steps of (1) taking the running speed as a, taking a as the running acceleration and taking delta as the conversion coefficient of the rotating mass of the automobile as delta;
in a specific embodiment, when driving on a highway, the commercial vehicle is usually in a constant-speed cruising state, in which the acceleration of the vehicle is theoretically zero, and the above driving equation is simplified as the following expression:
for example, highway driving is a common operation mode of commercial vehicles, the driving speed is generally 70 km/h to 120 km/h, and because highway road conditions are good, the highway is generally good asphalt pavement, the rolling resistance coefficient is small, and the gradient is small. In order to improve the driving safety of the vehicle, the rolling resistance coefficient in the embodiment of the invention ranges from 0.01 to 0.015, and the slope angle ranges from 0.1 to 1.5 degrees.
And calculating the load value of the vehicle to be measured according to the running equation and the values of the first parameter, the second parameter and the third parameter.
Illustratively, the gravity acceleration takes 9.8m/s2. According to the embodiment of the invention, a plurality of vehicle-mounted bus data of the vehicle to be tested are used as calculation bases, a relational expression of the vehicle-mounted bus data and the vehicle load value, namely a running equation, is established through the first parameter, the second parameter and the third parameter, and the load value of the vehicle to be tested is calculated based on the running equation. According to the embodiment of the invention, the measurement of the vehicle load is realized based on the running condition of the vehicle without considering the related structure of the vehicle configuration, and the multiple calibration is not required according to different vehicle types, so that the method and the device are suitable for various vehicle types, and the test accuracy of the vehicle load can be effectively improved while the measurement efficiency is improved.
As a specific implementation manner of the embodiment of the present invention, the second parameter and the third parameter are digitally filtered by using an arithmetic mean filtering method, or the second parameter and the third parameter are digitally filtered by using a median filtering method.
As a specific implementation manner of the embodiment of the present invention, the running acceleration of the vehicle to be tested is calculated by dividing the difference between the current running speed of the vehicle to be tested and the running speed of the vehicle at the previous sampling interval by the preset sampling interval.
As a specific implementation manner of the embodiment of the present invention, the interval of the preset sampling interval is 0.01 second to 0.1 second.
In an embodiment of the present invention, the preset sampling interval may be determined by analyzing the measurement data a plurality of times.
As a specific implementation manner of the embodiment of the present invention, the preset vehicle speed interval is 35 km/h to 45 km/h.
In the embodiment of the invention, the value of the preset vehicle speed interval is determined according to the judgment condition of the stable operation of the engine, so that the problem of large measurement error caused by unstable operation working condition and output torque of the engine when the vehicle speed is slow can be effectively solved, and the measurement stability can be effectively improved.
The embodiment of the invention has the following beneficial effects:
in the embodiment of the invention, a plurality of vehicle-mounted bus data of the vehicle to be tested are used as calculation bases, a relational expression of the vehicle-mounted bus data and the vehicle load value, namely a running equation, is established through a first parameter, a second parameter and a third parameter, and the load value of the vehicle to be tested is calculated based on the running equation; according to the embodiment of the invention, the load measurement is carried out without installing the strain gauge on the frame, so that the problem that the measurement error is too large or the measurement cannot be carried out due to the performance reduction or damage of the strain gauge can be avoided, and the reliability and stability of the load measurement can be effectively improved; according to the embodiment of the invention, the measurement of the vehicle load is realized based on the running condition of the vehicle without considering the related structure of the vehicle configuration, and the multiple calibration is not required according to different vehicle types, so that the method and the device are suitable for various vehicle types, and the test accuracy of the vehicle load can be effectively improved while the measurement efficiency is improved.
Referring to fig. 2, a second embodiment of the present invention provides a vehicle load measuring device, including:
the first parameter loading module 10 is used for setting a first parameter of the vehicle to be tested according to the model of the vehicle to be tested, restarting the vehicle to be tested and loading the first parameter, wherein the first parameter comprises the transmission ratio of a main speed reducer, the radius of wheels, the air resistance coefficient, the windward area, the conversion coefficient of the rotating mass of the automobile and the mechanical efficiency of a transmission system;
optionally, the vehicle body structures, the wheel sizes, the transmission systems, the power devices and other parameters of vehicles of different models are different, different parameters have different influences on subsequent calculation of the load of the vehicle, and in order to improve the accuracy and reliability of the subsequent calculation of the load of the vehicle, the first parameter is set according to the model of the vehicle to be measured. After the first parameter is set, in order to enable the fixed program with updated parameters to load the set first parameter, the embodiment of the invention restarts the vehicle to be tested, and after the vehicle to be tested is restarted, the data on the RAM of the vehicle to be tested is automatically emptied, and the set first parameter is reloaded.
In a specific implementation manner, the vehicle to be tested according to the embodiment of the invention is a commercial vehicle.
The second parameter obtaining module 20 is configured to control the vehicle speed of the vehicle to be tested to reach a preset vehicle speed interval, obtain a message from the vehicle-mounted CAN bus according to a preset sampling interval, and obtain a second parameter according to the message, where the second parameter includes an engine output torque, a driving vehicle speed, a driving acceleration, and a transmission ratio of the transmission;
optionally, in order to enable the engine to be tested under a stable working condition, the embodiment of the invention enables the operating condition and the output torque of the engine to be stable by controlling the speed of the vehicle to be tested to reach the preset speed range, so that the accuracy of the obtained second parameter can be effectively improved, and the accuracy and the stability of subsequent vehicle load calculation can be improved.
The third parameter acquisition module 30 is used for acquiring a third parameter of a road on which a vehicle to be detected runs from the vehicle-mounted CAN bus by combining a vehicle-mounted electronic map at a preset sampling interval, wherein the third parameter comprises a rolling resistance coefficient and a slope angle;
the vehicle-mounted electronic map comprises the specific road condition of the vehicle to be detected on the road to be driven, and has a GPS positioning function.
And the vehicle load calculation module 40 is configured to perform digital filtering on the second parameter and the third parameter, and calculate the load value of the vehicle to be measured by combining the digitally filtered second parameter and third parameter with the first parameter.
In the embodiment of the invention, the second parameter and the third parameter are filtered by adopting a digital filtering mode, so that the influence of interference or noise on the parameters can be effectively eliminated, the precision and the reliability of parameter acquisition are improved, and the precision and the reliability of vehicle load measurement can be improved.
As a specific implementation manner of the embodiment of the present invention, the vehicle load calculation module 40 is specifically configured to:
combining the digitally filtered second parameter and the digitally filtered third parameter with the first parameter to obtain a driving equation:
wherein, TtqIs the output torque of the engine, igTo the transmission ratio of the variator, ioIs the transmission ratio of the main speed reducer, eta is the mechanical efficiency of the transmission system, r is the radius of the wheel, m is the load value of the vehicle to be measured, g is the gravity acceleration, f is the rolling resistance coefficient, alpha is the slope angle, CDIs the coefficient of air resistance, A is the frontal area, uaThe method comprises the following steps of (1) taking the running speed as a, taking a as the running acceleration and taking delta as the conversion coefficient of the rotating mass of the automobile as delta;
in a specific embodiment, when driving on a highway, the commercial vehicle is usually in a constant-speed cruising state, in which the acceleration of the vehicle is theoretically zero, and the above driving equation is simplified as the following expression:
for example, highway driving is a common operation mode of commercial vehicles, the driving speed is generally 70 km/h to 120 km/h, and because highway road conditions are good, the highway is generally good asphalt pavement, the rolling resistance coefficient is small, and the gradient is small. In order to improve the driving safety of the vehicle, the rolling resistance coefficient in the embodiment of the invention ranges from 0.01 to 0.015, and the slope angle ranges from 0.1 to 1.5 degrees.
And calculating the load value of the vehicle to be measured according to the running equation and the values of the first parameter, the second parameter and the third parameter.
Illustratively, the gravity acceleration takes 9.8m/s2. According to the embodiment of the invention, a plurality of vehicle-mounted bus data of the vehicle to be tested are used as calculation basesAnd constructing a relational expression of the vehicle-mounted bus data and the vehicle load value, namely a running equation, through the first parameter, the second parameter and the third parameter, and calculating the load value of the vehicle to be measured based on the running equation. According to the embodiment of the invention, the measurement of the vehicle load is realized based on the running condition of the vehicle without considering the related structure of the vehicle configuration, and the multiple calibration is not required according to different vehicle types, so that the method and the device are suitable for various vehicle types, and the test accuracy of the vehicle load can be effectively improved while the measurement efficiency is improved.
As a specific implementation manner of the embodiment of the present invention, the second parameter and the third parameter are digitally filtered by using an arithmetic mean filtering method, or the second parameter and the third parameter are digitally filtered by using a median filtering method.
As a specific implementation manner of the embodiment of the present invention, the running acceleration of the vehicle to be tested is calculated by dividing the difference between the current running speed of the vehicle to be tested and the running speed of the vehicle at the previous sampling interval by the preset sampling interval.
As a specific implementation manner of the embodiment of the present invention, the interval of the preset sampling interval is 0.01 second to 0.1 second.
In an embodiment of the present invention, the preset sampling interval may be determined by analyzing the measurement data a plurality of times.
As a specific implementation manner of the embodiment of the present invention, the preset vehicle speed interval is 35 km/h to 45 km/h.
In the embodiment of the invention, the value of the preset vehicle speed interval is determined according to the judgment condition of the stable operation of the engine, so that the problem of large measurement error caused by unstable operation working condition and output torque of the engine when the vehicle speed is slow can be effectively solved, and the measurement stability can be effectively improved.
The embodiment of the invention has the following beneficial effects:
in the embodiment of the invention, a plurality of vehicle-mounted bus data of the vehicle to be tested are used as calculation bases, a relational expression of the vehicle-mounted bus data and the vehicle load value, namely a running equation, is established through a first parameter, a second parameter and a third parameter, and the load value of the vehicle to be tested is calculated based on the running equation; according to the embodiment of the invention, the load measurement is carried out without installing the strain gauge on the frame, so that the problem that the measurement error is too large or the measurement cannot be carried out due to the performance reduction or damage of the strain gauge can be avoided, and the reliability and stability of the load measurement can be effectively improved; according to the embodiment of the invention, the measurement of the vehicle load is realized based on the running condition of the vehicle without considering the related structure of the vehicle configuration, and the multiple calibration is not required according to different vehicle types, so that the method and the device are suitable for various vehicle types, and the test accuracy of the vehicle load can be effectively improved while the measurement efficiency is improved.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (8)
1. A vehicle load measuring method, comprising:
setting a first parameter of a vehicle to be tested according to the model of the vehicle to be tested, restarting the vehicle to be tested, and loading the first parameter, wherein the first parameter comprises the transmission ratio of a main speed reducer, the radius of wheels, the air resistance coefficient, the windward area, the conversion coefficient of the rotating mass of the vehicle and the mechanical efficiency of a transmission system;
controlling the speed of the vehicle to be tested to reach a preset speed interval, acquiring a message from a vehicle-mounted CAN bus according to a preset sampling interval, and acquiring a second parameter according to the message, wherein the second parameter comprises engine output torque, running speed, running acceleration and transmission ratio of a transmission;
acquiring a third parameter of the road on which the vehicle to be detected runs from the vehicle-mounted CAN bus by combining the vehicle-mounted electronic map at the preset sampling interval, wherein the third parameter comprises a rolling resistance coefficient and a slope angle;
and carrying out digital filtering on the second parameter and the third parameter, and calculating the load value of the vehicle to be measured by combining the digitally filtered second parameter and the digitally filtered third parameter with the first parameter.
2. The method for measuring vehicle load according to claim 1, wherein the load value of the vehicle to be measured is calculated by combining the digitally filtered second parameter and the digitally filtered third parameter with the first parameter, and specifically:
combining the digitally filtered second parameter and the digitally filtered third parameter with the first parameter to obtain a driving equation:
wherein, TtqIs the output torque of the engine, igTo the transmission ratio of the variator, ioIs the transmission ratio of the main speed reducer, eta is the mechanical efficiency of the transmission system, r is the radius of the wheel, m is the load value of the vehicle to be measured, g is the gravity acceleration, f is the rolling resistance coefficient, alpha is the slope angle, CDIs the coefficient of air resistance, A is the frontal area, uaThe method comprises the following steps of (1) taking the running speed as a, taking a as the running acceleration and taking delta as the conversion coefficient of the rotating mass of the automobile as delta;
and calculating the load value of the vehicle to be measured according to the running equation and the values of the first parameter, the second parameter and the third parameter.
3. The vehicle load measuring method of claim 1, wherein the second parameter and the third parameter are digitally filtered using an arithmetic mean filtering method.
4. The vehicle load measuring method of claim 1, wherein said second parameter and said third parameter are digitally filtered using a median filtering method.
5. The vehicle load measuring method according to claim 1, wherein the running acceleration of the vehicle to be measured is calculated by dividing a difference between a current running vehicle speed of the vehicle to be measured and a running vehicle speed of a last sampling interval by the preset sampling interval.
6. The vehicle load measuring method according to claim 1, wherein the interval of the preset sampling interval is 0.01 second to 0.1 second.
7. The vehicle load measuring method according to claim 1, wherein the preset vehicle speed interval is 35 km/h to 45 km/h.
8. A vehicle load measuring device, comprising:
the first parameter loading module is used for setting a first parameter of the vehicle to be tested according to the model of the vehicle to be tested, restarting the vehicle to be tested and loading the first parameter, wherein the first parameter comprises the transmission ratio of a main speed reducer, the radius of wheels, the air resistance coefficient, the windward area, the conversion coefficient of the rotating mass of the automobile and the mechanical efficiency of a transmission system;
the second parameter acquisition module is used for controlling the speed of the vehicle to be detected to reach a preset speed interval, acquiring a message from a vehicle-mounted CAN bus according to a preset sampling interval, and acquiring a second parameter according to the message, wherein the second parameter comprises engine output torque, driving speed, driving acceleration and transmission ratio of a transmission;
the third parameter acquisition module is used for acquiring a third parameter of a road driven by the vehicle to be detected from the vehicle-mounted CAN bus by combining a vehicle-mounted electronic map at the preset sampling interval, wherein the third parameter comprises a rolling resistance coefficient and a slope angle;
and the vehicle load calculation module is used for carrying out digital filtering on the second parameter and the third parameter and calculating the load value of the vehicle to be measured by combining the digitally filtered second parameter and the digitally filtered third parameter with the first parameter.
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| CN114407906A (en) * | 2022-01-25 | 2022-04-29 | 东风柳州汽车有限公司 | Vehicle load measuring method and device, storage medium and equipment |
| CN114877981A (en) * | 2022-04-26 | 2022-08-09 | 东风柳州汽车有限公司 | Tire load measuring method and device |
| CN114954494A (en) * | 2022-06-14 | 2022-08-30 | 广西玉柴机器股份有限公司 | Heavy commercial vehicle load rapid estimation method |
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