CN105466695B - A kind of detection method and device of vehicles dynamic performance - Google Patents
A kind of detection method and device of vehicles dynamic performance Download PDFInfo
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Abstract
The present invention provides a kind of detection method and device of vehicles dynamic performance, and the method includes obtaining the driving parameters of vehicle in the process of moving；According to the driving parameters, the corresponding at least one detection parameters of the driving process are obtained；According at least one detection parameters, the corresponding power property arguments of the driving process are obtained；Wherein, at least one detection parameters include one or more of following parameter: high speed performance parameter, accelerating ability parameter and grade climbing performance parameter；If at least one detection parameters include high speed performance parameter, the driving parameters include: the corresponding speed of multiple moment in the driving process.It can be seen that, do not go out the power performance of vehicle in the embodiment of the present invention further according to the build-in attribute theoretical calculation of vehicle, and there is provided a kind of driving parameters according to vehicle in use, detect the mode of vehicles dynamic performance, therefore testing result can more reflect actual use situation.
Description
Technical Field
The invention relates to the field of vehicle detection, in particular to a method and a device for detecting vehicle dynamic performance.
Background
The vehicle dynamic performance is used for reflecting the dynamic performance of the vehicle in the running process, is the most basic performance of the vehicle, and occupies a very important position in the performance index of the vehicle.
At present, when detecting the dynamic performance of the vehicle, manufacturers of various vehicles mainly calculate the dynamic performance according to the inherent properties of the vehicle, such as the power, the rotating speed and the like of the vehicle. Obviously, the detection mode can only calculate the power performance of the vehicle theoretically and cannot reflect the power performance of the vehicle in the use process.
Obviously, how to detect the power performance of a vehicle in a using process is a problem to be solved urgently at present.
Disclosure of Invention
The invention aims to provide a method and a device for detecting the dynamic performance of a vehicle, which are used for detecting the dynamic performance of the vehicle in the using process.
Therefore, the technical scheme for solving the technical problem is as follows:
the invention provides a method for detecting the dynamic performance of a vehicle, which comprises the following steps:
acquiring driving parameters of a vehicle in a driving process;
acquiring at least one detection parameter corresponding to the driving process according to the driving parameters;
acquiring a power performance parameter corresponding to the driving process according to the at least one detection parameter;
wherein the at least one detection parameter comprises one or more of the following parameters: a high speed performance parameter, an acceleration performance parameter, and a climbing performance parameter;
if the at least one detection parameter comprises a high speed performance parameter, the driving parameter comprises: the vehicle speeds respectively correspond to a plurality of moments in the driving process; if the at least one detection parameter comprises an acceleration performance parameter, the driving process comprises an acceleration process, and the driving parameter comprises vehicle speeds respectively corresponding to a plurality of moments in the acceleration process; if the at least one detection parameter comprises a climbing performance parameter, the driving process comprises a climbing process, and the driving parameters comprise altitude difference in the climbing process and vehicle speeds corresponding to a plurality of moments respectively.
Optionally, the obtaining process of the high-speed performance parameter includes:
acquiring corresponding total travel distance and travel distance with the vehicle speed larger than a vehicle speed threshold according to the vehicle speeds corresponding to the multiple moments in the travel process;
and acquiring the high-speed performance parameters according to the ratio of the travel distance of which the vehicle speed is greater than the vehicle speed threshold value to the total travel distance.
Optionally, the obtaining process of the acceleration performance parameter includes:
acquiring acceleration corresponding to the driving process between every two adjacent moments according to the speeds corresponding to the multiple moments in the acceleration process respectively;
acquiring the acceleration with the maximum value from the accelerations corresponding to the driving process between every two adjacent moments as a first maximum acceleration;
acquiring equivalent acceleration time according to the ratio of a speed change value and the first maximum acceleration, wherein the speed change value is the speed difference between a preset initial speed and a preset finishing speed;
obtaining the acceleration performance parameter by comparing the equivalent acceleration time to an acceleration time threshold; wherein the acceleration time threshold is associated with the preset initial vehicle speed and the end vehicle speed.
Optionally, the acceleration time threshold includes a first time threshold and a second time threshold, and the second time threshold is greater than the first time threshold;
obtaining the acceleration performance parameter by comparing the equivalent acceleration time to an acceleration time threshold, including:
if Ta＞T2The acceleration performance parameter is 0;
if T1≤Ta≤T2The acceleration performance parameter is (T)2-Ta)/(T2-T1)；
If Ta＜T1The acceleration performance parameter is 1;
wherein, TaFor the equivalent accelerationM, T1Is the first time threshold, T2Is the second time threshold.
Optionally, the obtaining process of the climbing performance parameter includes:
acquiring acceleration corresponding to the driving process between every two adjacent moments according to the speeds corresponding to the multiple moments in the climbing process;
acquiring the acceleration with the largest numerical value from the accelerations corresponding to the driving process between every two adjacent moments as a second maximum acceleration;
obtaining an equivalent climbing slope according to the ratio of the second maximum acceleration to the gravity acceleration and the ratio of the altitude difference to the driving distance in the climbing process;
and comparing the equivalent climbing gradient with a climbing gradient threshold value to obtain the climbing performance parameter.
Optionally, the climbing gradient threshold includes a first gradient threshold and a second gradient threshold, and the second gradient threshold is greater than the first gradient threshold;
through with equivalent climbing slope and climbing slope threshold value compare, acquire climbing performance parameter includes:
if αG＞α2The climbing performance parameter is 1;
if α1≤αG≤α2The climbing performance parameter is (α)G-α1)/(α2-α1)；
If αG＜α1The climbing performance parameter is 0;
wherein, αGFor the equivalent climbing gradient, α1The first gradient threshold value, α2Is the second slope threshold.
The invention provides a vehicle dynamic performance detection device, which comprises:
the driving parameter acquiring unit is used for acquiring driving parameters of the vehicle in the driving process;
the detection parameter acquisition unit is used for acquiring at least one detection parameter corresponding to the driving process according to the driving parameters;
the performance parameter acquisition unit is used for acquiring a power performance parameter corresponding to the driving process according to the at least one detection parameter;
wherein the at least one detection parameter comprises one or more of the following parameters: a high speed performance parameter, an acceleration performance parameter, and a climbing performance parameter;
if the at least one detection parameter comprises a high speed performance parameter, the driving parameter comprises: the vehicle speeds respectively correspond to a plurality of moments in the driving process; if the at least one detection parameter comprises an acceleration performance parameter, the driving process comprises an acceleration process, and the driving parameter comprises vehicle speeds respectively corresponding to a plurality of moments in the acceleration process; if the at least one detection parameter comprises a climbing performance parameter, the driving process comprises a climbing process, and the driving parameters comprise altitude difference in the climbing process and vehicle speeds corresponding to a plurality of moments respectively.
Optionally, when the high-speed performance parameter is obtained, the detection parameter obtaining unit is specifically configured to:
acquiring corresponding total travel distance and travel distance with the vehicle speed larger than a vehicle speed threshold according to the vehicle speeds corresponding to the multiple moments in the travel process;
and acquiring the high-speed performance parameters according to the ratio of the travel distance of which the vehicle speed is greater than the vehicle speed threshold value to the total travel distance.
Optionally, when the acceleration performance parameter is obtained, the detection parameter obtaining unit is specifically configured to:
acquiring acceleration corresponding to the driving process between every two adjacent moments according to the speeds corresponding to the multiple moments in the acceleration process respectively;
acquiring the acceleration with the maximum value from the accelerations corresponding to the driving process between every two adjacent moments as a first maximum acceleration;
acquiring equivalent acceleration time according to the ratio of a speed change value and the first maximum acceleration, wherein the speed change value is the speed difference between a preset initial speed and a preset finishing speed;
obtaining the acceleration performance parameter by comparing the equivalent acceleration time to an acceleration time threshold; wherein the acceleration time threshold is associated with the preset initial vehicle speed and the end vehicle speed.
Optionally, the acceleration time threshold includes a first time threshold and a second time threshold, and the second time threshold is greater than the first time threshold;
when the acceleration performance parameter is obtained by comparing the equivalent acceleration time with an acceleration time threshold, the detection parameter obtaining unit is specifically configured to:
if Ta＞T2The acceleration performance parameter is 0;
if T1≤Ta≤T2The acceleration performance parameter is (T)2-Ta)/(T2-T1)；
If Ta＜T1The acceleration performance parameter is 1;
wherein, TaFor said equivalent acceleration time, T1Is the first time threshold, T2Is the second time threshold.
Optionally, when the climbing performance parameter is obtained, the detection parameter obtaining unit is specifically configured to:
acquiring acceleration corresponding to the driving process between every two adjacent moments according to the speeds corresponding to the multiple moments in the climbing process;
acquiring the acceleration with the largest numerical value from the accelerations corresponding to the driving process between every two adjacent moments as a second maximum acceleration;
obtaining an equivalent climbing slope according to the ratio of the second maximum acceleration to the gravity acceleration and the ratio of the altitude difference to the driving distance in the climbing process;
and comparing the equivalent climbing gradient with a climbing gradient threshold value to obtain the climbing performance parameter.
Optionally, the climbing gradient threshold includes a first gradient threshold and a second gradient threshold, and the second gradient threshold is greater than the first gradient threshold;
when the equivalent climbing gradient is compared with the climbing gradient threshold value to acquire the climbing performance parameter, the detection parameter acquisition unit is specifically used for:
if αG＞α2The climbing performance parameter is 1;
if α1≤αG≤α2The climbing performance parameter is (α)G-α1)/(α2-α1)；
If αG＜α1The climbing performance parameter is 0;
wherein, αGFor the equivalent climbing gradient, α1The first gradient threshold value, α2Is the second slope threshold.
According to the technical scheme, one or more of the high-speed performance parameter, the acceleration performance parameter and the climbing performance parameter can be obtained according to the driving parameters of the vehicle in the driving process, and the power performance parameter can be obtained according to the obtained one or more parameters, namely the detection of the power performance is realized. Therefore, the power performance of the vehicle is not calculated according to the inherent attribute theory of the vehicle, but a mode of detecting the power performance of the vehicle according to the running parameters of the vehicle in the use process is provided, so that the detection result can reflect the actual use condition better.
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In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art according to the drawings.
FIG. 1 is a schematic flow chart of an embodiment of a method according to the present invention;
fig. 2 is a schematic structural diagram of an embodiment of an apparatus according to an embodiment of the present invention.
Detailed Description
Referring to FIG. 1, a method embodiment of a method for detecting a vehicle dynamic performance is provided. The method of the embodiment comprises the following steps:
s101: and acquiring the running parameters of the vehicle in the running process.
In the embodiment of the present invention, the driving parameter is used to represent a driving state of the vehicle during the driving process, and may include, for example, vehicle speeds corresponding to a plurality of times, respectively, and an altitude difference during climbing, and the like.
It is understood that the vehicle in the embodiment of the present invention refers to a motor vehicle, and may be embodied as an automobile, for example.
S102: and acquiring at least one detection parameter corresponding to the driving process according to the driving parameters.
In an embodiment of the present invention, the at least one detection parameter comprises one or more of the following parameters: high speed performance parameters, acceleration performance parameters, and hill climbing performance parameters. The at least one detection parameter can reflect a maximum ability of the vehicle to transport items or passengers. These parameters are described separately below.
The high-speed performance parameter refers to a parameter for reflecting the high-speed running capability of the vehicle. For example, the high-speed traveling capability can be obtained from the specific gravity of the high-speed traveling, and a larger specific gravity indicates a higher high-speed traveling capability. The high-speed performance parameters can be obtained according to vehicle speeds corresponding to a plurality of moments in the driving process.
The acceleration performance parameter refers to a parameter for reflecting the vehicle speed acceleration capability. For example, the equivalent acceleration time may be obtained, where the equivalent acceleration time refers to the time required for the vehicle to accelerate from a preset initial vehicle speed (e.g. 0 km/h) to an end vehicle speed (e.g. 100 km/h) during acceleration, and a shorter equivalent acceleration time indicates a stronger acceleration capability of the vehicle. The acceleration performance parameters can be obtained according to vehicle speeds corresponding to a plurality of moments in the acceleration process.
The climbing capability parameter refers to a parameter for reflecting the climbing capability of the vehicle. For example, the equivalent climbing gradient can be obtained according to the maximum climbing gradient which can be reached by the vehicle. The climbing capability parameter can be obtained according to the altitude difference in the climbing process and the vehicle speeds corresponding to a plurality of moments respectively.
If the at least one detection parameter comprises a high speed performance parameter, the driving parameter comprises: the vehicle speeds respectively correspond to a plurality of moments in the driving process; if the at least one detection parameter comprises an acceleration performance parameter, the driving process comprises an acceleration process, and the driving parameter comprises vehicle speeds respectively corresponding to a plurality of moments in the acceleration process; if the at least one detection parameter comprises a climbing performance parameter, the driving process comprises a climbing process, and the driving parameters comprise altitude difference in the climbing process and vehicle speeds corresponding to a plurality of moments respectively.
S103: and acquiring the power performance parameters corresponding to the driving process according to the at least one detection parameter.
In the embodiment of the invention, the high-speed performance parameter, the acceleration performance parameter and the climbing performance parameter can all reflect the dynamic performance of the vehicle, so the dynamic performance parameter is obtained according to the at least one detection parameter, namely the detection of the dynamic performance is realized. For example, the sum of the at least one detection parameter, or the average of the at least one detection parameter is used as the power performance parameter.
According to the technical scheme, one or more of the high-speed performance parameter, the acceleration performance parameter and the climbing performance parameter can be obtained according to the driving parameters of the vehicle in the driving process, and the power performance parameter can be obtained according to the obtained one or more parameters, namely the detection of the power performance is realized. Therefore, the power performance of the vehicle is not calculated according to the inherent attribute theory of the vehicle, but a mode of detecting the power performance of the vehicle according to the running parameters of the vehicle in the use process is provided, so that the detection result can reflect the actual use condition better.
The method provided by the embodiment of the invention can be used for detecting the dynamic performance of the vehicle when the vehicle runs for a certain distance, so that the detection result of the dynamic performance of the vehicle is provided in real time.
Alternative acquisition modes for each detection parameter are provided below.
(1) High speed performance parameters
In this embodiment of the present invention, the obtaining process of the high speed performance parameter may include: s201 and S202.
S201: and acquiring corresponding total travel distance and travel distance with the vehicle speed greater than a vehicle speed threshold according to the vehicle speeds respectively corresponding to the multiple moments in the travel process.
When the total travel distance and the travel distance with the vehicle speed greater than the vehicle speed threshold are obtained, the total travel distance and the travel distance with the vehicle speed greater than the vehicle speed threshold may be obtained according to one or more assumed models, for example, a constant speed travel model may be used to obtain the total travel distance and the travel distance with the vehicle speed greater than the vehicle speed threshold.
For example, the driving parameters include vehicle speeds corresponding to n +1 times, where n ≧ 1:
wherein,represents the time tiI is more than or equal to 0 and less than or equal to n.
For time tiThe high-speed judgment formula is as follows:
wherein v isthFor preset vehicle speed threshold, e.g. vthAnd may be set to 40 km/h.
The driving distance D (namely the high-speed driving distance) with the vehicle speed larger than the vehicle speed threshold value is obtained by utilizing the uniform speed driving modelhsComprises the following steps:
wherein, Δ ti＝ti-ti-1，i＝1,2,…,n。
The total travel distance D obtained by using the uniform velocity travel model is:
s202: and acquiring the high-speed performance parameters according to the ratio of the travel distance of which the vehicle speed is greater than the vehicle speed threshold value to the total travel distance.
The high speed performance parameter deltahThe method can be specifically as follows:
wherein, deltahThe larger the vehicle speed, the better the high speed performance during the running.
It can be seen that, in the embodiment of the present invention, the high-speed performance parameter is calculated according to the high-speed travel distance and the total travel distance, so that the high-speed performance parameter can be unified, that is, the standard unified high-speed performance parameter can be calculated according to any one travel process (the initial vehicle speed and the end vehicle speed in the travel process are not limited).
The high-speed performance parameter may be calculated by a method other than the above-described method, and this is not limited in the embodiment of the present invention.
(2) Acceleration performance parameter
In an embodiment of the present invention, the driving process includes an acceleration process, and the obtaining of the acceleration performance parameter according to the driving parameter corresponding to the acceleration process may include: s301 to S304.
S301: and acquiring the acceleration corresponding to the running process between every two adjacent moments according to the speeds corresponding to the multiple moments in the acceleration process. When acquiring the acceleration, the acceleration may be acquired according to one or more assumed models, for example, the acceleration may be acquired by using a uniform acceleration model.
For example, the driving parameters include vehicle speeds corresponding to n +1 moments in the acceleration process, where n is greater than or equal to 1:
wherein,represents the time tiI is more than or equal to 0 and less than or equal to n,
with the uniform acceleration model, the acceleration corresponding to the driving process between every two adjacent moments can be calculated according to the following formula:
wherein, aiIndicating two adjacent time instants tiAnd ti-1Acceleration, Δ t, corresponding to the course of travel therebetweeni＝ti-ti-1，i＝1,2,…,n。In addition, a isiIf Δ t in the formula (1)iThe unit of (a) is a second,needs to be multiplied by a coefficient on the right side of the formula when the unit of (A) is kilometer per hour
S302: and acquiring the acceleration with the maximum value from the accelerations corresponding to the driving process between every two adjacent moments as a first maximum acceleration.
For example, the first maximum acceleration amax＝max[a1,a2,…,an]。
In the embodiment of the invention, sinceThus all aiAre all positive values, therefore, the maximum a during the entire accelerationiThe corresponding running process has the optimal acceleration performance, so the acceleration corresponding to the optimal acceleration performance is adopted in the embodiment of the invention, and the equivalent acceleration time is calculated.
S303: obtaining the equivalent acceleration time T according to the ratio of the speed change value and the first maximum accelerationa。
For example, the equivalent acceleration time TaComprises the following steps:
and the delta v is a speed change value, wherein the speed change value is a speed difference between a preset initial vehicle speed and a preset finishing vehicle speed. For example, if the preset initial vehicle speed is 0 and the end vehicle speed is 100 km/h, the speed variation value is 100 km/h. It should be noted that if TaIn seconds and av in kilometers/hour, it is necessary to multiply the coefficients to the right of the formula
S304: and obtaining the acceleration performance parameter by comparing the equivalent acceleration time with an acceleration time threshold.
In the embodiment of the present invention, the acceleration time threshold is related to the preset initial vehicle speed and the preset end vehicle speed, and the acceleration time threshold may be specifically set according to an empirical value, or may be set according to a statistical value, for example, a large number of equivalent acceleration times are counted, and the acceleration time threshold is set according to distribution of the large number of equivalent acceleration times.
Wherein the acceleration time threshold comprises a first time threshold T1And a second time threshold T2A second time threshold T2Greater than a first time threshold T1。
Acceleration performance parameter deltaaThe method specifically comprises the following steps:
wherein the acceleration performance parameter deltaaThe larger the vehicle acceleration performance, the better. Wherein, if the initial speed is 0 km/h and the finishing speed is 100 km/h, the first time threshold T is1May be 15 seconds, the second time threshold T2And may be 120 seconds.
It can be seen that, in the embodiment of the present invention, the calculated actual acceleration time of the vehicle is not the actual acceleration time of the vehicle, but the equivalent acceleration time is calculated according to the acceleration of the vehicle in the actual acceleration process and by combining the preset initial vehicle speed and the preset end vehicle speed, so that the standards of the acceleration performance parameters are unified, that is, the standard unified acceleration performance parameters can be calculated according to any one acceleration process (the initial vehicle speed and the end vehicle speed in the acceleration process are not limited).
The acceleration performance parameter may be calculated by a method other than the above-described method, which is not limited in the embodiment of the present invention.
(3) Grade climbing performance parameter
In an embodiment of the present invention, the driving process includes a climbing process, and the climbing performance parameter is obtained according to a driving parameter corresponding to the climbing process, where the specific obtaining process may include: s401 to S404.
S401: and acquiring the acceleration corresponding to the driving process between every two adjacent moments according to the speeds corresponding to the multiple moments in the climbing process.
When acquiring the acceleration, the acceleration may be acquired according to one or more assumed models, for example, the acceleration may be acquired by using a uniform acceleration model. For example, the driving parameters include vehicle speeds corresponding to n +1 moments in the climbing process, where n is greater than or equal to 1:
wherein,represents the time tiI is more than or equal to 0 and less than or equal to n.
With the uniform acceleration model, the acceleration corresponding to the driving process between every two adjacent moments can be calculated according to the following formula:
wherein, aiIndicating two adjacent time instants tiAnd ti-1Acceleration, Δ t, corresponding to the course of travel therebetweeni＝ti-ti-1，i＝1,2,…,n。In addition, a isiIf Δ t in the formula (1)iThe unit of (a) is a second,needs to be multiplied by a coefficient on the right side of the formula when the unit of (A) is kilometer per hour
S402: and acquiring the acceleration with the maximum value from the accelerations corresponding to the driving process between every two adjacent moments as a second maximum acceleration.
For example, the second maximum acceleration amax＝max[a1,a2,…,an]。
If the second maximum acceleration is a negative value, the second maximum acceleration may be 0.
S403, obtaining an equivalent climbing slope α according to the ratio of the second maximum acceleration to the gravitational acceleration and the ratio of the altitude difference to the driving distance in the climbing processG。
For example, the driving parameter includes an altitude difference of the hill climbing process ofWherein the altitude difference may be acquired by a positioning device mounted on the vehicle.
Equivalent climbing slope αGCan be as follows:
wherein, amaxIs the second maximum acceleration, g is the gravitational acceleration,Δti＝ti-ti-1。
in addition, s isiIf Δ t in the formula (1)iThe unit of (a) is a second,andneeds to be multiplied by a coefficient on the right side of the formula when the unit of (A) is kilometer per hourAt αGMay be multiplied by a coefficient on the right side of the formulaThe radian to degree conversion is performed.
S404: and comparing the equivalent climbing gradient with a climbing gradient threshold value to obtain the climbing performance parameter.
The climbing slope threshold value can be specifically set according to an empirical value, and can also be set according to a statistical value, for example, a large number of equivalent climbing slopes are counted, and the climbing slope threshold value is set according to the distribution of the equivalent climbing slopes.
Wherein the hill climb gradient threshold may comprise a first gradient threshold α1And a second grade threshold α2Second grade threshold α2Greater than a first grade threshold α1。
Grade climbing performance parameter deltaGThe method specifically comprises the following steps:
wherein the climbing performance parameter deltaGThe greater the vehicle grade, the better the grade of the vehicle is represented α1May be 0 deg., and the second slope threshold α2May be 60.
It can be seen that, in the embodiment of the present invention, the equivalent climbing gradient is obtained according to the acceleration, the altitude difference, and the driving distance in the climbing process, so that the standard unification of the climbing performance parameters is realized, that is, the standard unification of the climbing performance parameters can be calculated according to any one section of climbing process.
The climbing performance parameter may be calculated by a method other than the above-described method, which is not limited in the embodiment of the present invention.
The high-speed performance parameter δ calculated in the above mannerhAcceleration performance parameter deltaaAnd a climbing performance parameter deltaGAll values are between 0 and 1, and therefore, the sum of the three parameters or the average of the three parameters can be taken as the final dynamic performance parameter.
The invention also provides an embodiment of the device corresponding to the embodiment of the method, which is specifically described below.
Referring to FIG. 2, an embodiment of a vehicle dynamics detection apparatus is provided.
The apparatus of this embodiment includes: a running parameter acquisition unit 201, a detection parameter acquisition unit 202, and a performance parameter acquisition unit 203.
A driving parameter acquiring unit 201, configured to acquire a driving parameter of the vehicle during driving.
In the embodiment of the present invention, the driving parameter is used to represent a driving state of the vehicle during the driving process, and may include, for example, vehicle speeds corresponding to a plurality of times, respectively, and an altitude difference during climbing, and the like.
A detection parameter obtaining unit 202, configured to obtain at least one detection parameter corresponding to the driving process according to the driving parameter.
In an embodiment of the present invention, the at least one detection parameter comprises one or more of the following parameters: high speed performance parameters, acceleration performance parameters, and hill climbing performance parameters. The at least one detection parameter can reflect a maximum ability of the vehicle to transport items or passengers.
If the at least one detection parameter comprises a high speed performance parameter, the driving parameter comprises: the vehicle speeds respectively correspond to a plurality of moments in the driving process; if the at least one detection parameter comprises an acceleration performance parameter, the driving process comprises an acceleration process, and the driving parameter comprises vehicle speeds respectively corresponding to a plurality of moments in the acceleration process; if the at least one detection parameter comprises a climbing performance parameter, the driving process comprises a climbing process, and the driving parameters comprise altitude difference in the climbing process and vehicle speeds corresponding to a plurality of moments respectively.
A performance parameter obtaining unit 203, configured to obtain a power performance parameter corresponding to the driving process according to the at least one detection parameter.
In the embodiment of the invention, the high-speed performance parameter, the acceleration performance parameter and the climbing performance parameter can all reflect the dynamic performance of the vehicle, so the dynamic performance parameter is obtained according to the at least one detection parameter, namely the detection of the dynamic performance is realized. For example, the sum of the at least one detection parameter, or the average of the at least one detection parameter is used as the power performance parameter.
The device provided by the embodiment of the invention can work in the driving process of the vehicle, for example, the power performance is detected every time the vehicle drives for a certain distance, so that the detection result of the power performance of the vehicle is provided in real time.
Optionally, when acquiring the high-speed performance parameter, the detection parameter acquiring unit 202 is specifically configured to: acquiring a corresponding total travel distance and a travel distance of which the vehicle speed is greater than a vehicle speed threshold value according to vehicle speeds respectively corresponding to a plurality of moments in the travel process, for example, acquiring by using a constant speed travel model; and acquiring the high-speed performance parameters according to the ratio of the travel distance of which the vehicle speed is greater than the vehicle speed threshold value to the total travel distance.
Optionally, when acquiring the acceleration performance parameter, the detection parameter acquiring unit 202 is specifically configured to: acquiring the acceleration corresponding to the driving process between every two adjacent moments according to the speeds corresponding to the multiple moments in the acceleration process, for example, acquiring the acceleration by using a uniform acceleration model; acquiring the acceleration with the maximum value from the accelerations corresponding to the driving process between every two adjacent moments as a first maximum acceleration; acquiring equivalent acceleration time according to the ratio of a speed change value and the first maximum acceleration, wherein the speed change value is the speed difference between a preset initial speed and a preset finishing speed; obtaining the acceleration performance parameter by comparing the equivalent acceleration time to an acceleration time threshold; wherein the acceleration time threshold is associated with the preset initial vehicle speed and the end vehicle speed.
Wherein the acceleration time threshold comprises a first time threshold and a second time threshold, the second time threshold being greater than the first time threshold. When the acceleration performance parameter is obtained by comparing the equivalent acceleration time with an acceleration time threshold, the detection parameter obtaining unit 202 is specifically configured to:
if Ta＞T2The acceleration performance parameter is 0;
if T1≤Ta≤T2The acceleration performance parameter is (T)2-Ta)/(T2-T1)；
If Ta＜T1The acceleration performance parameter is 1;
wherein, TaFor said equivalent acceleration time, T1Is the first time threshold, T2Is the second time threshold.
Optionally, when the climbing performance parameter is obtained, the detection parameter obtaining unit 202 is specifically configured to: acquiring acceleration corresponding to the driving process between every two adjacent moments according to the speeds corresponding to the multiple moments in the climbing process, for example, acquiring the acceleration by using a uniform acceleration model; acquiring the acceleration with the largest numerical value from the accelerations corresponding to the driving process between every two adjacent moments as a second maximum acceleration; obtaining an equivalent climbing slope according to the ratio of the second maximum acceleration to the gravity acceleration and the ratio of the altitude difference to the driving distance in the climbing process; and comparing the equivalent climbing gradient with a climbing gradient threshold value to obtain the climbing performance parameter.
Wherein the grade climbing threshold comprises a first grade threshold and a second grade threshold, the second grade threshold being greater than the first grade threshold; when the climbing performance parameter is acquired by comparing the equivalent climbing gradient with the climbing gradient threshold, the detection parameter acquiring unit 202 is specifically configured to:
if αG＞α2The climbing performance parameter is 1;
if α1≤αG≤α2The climbing performance parameter is (α)G-α1)/(α2-α1)；
If αG＜α1The climbing performance parameter is 0;
wherein, αGFor the equivalent climbing gradient, α1The first gradient threshold value, α2Is the second slope threshold.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (12)
1. A method of detecting a vehicle dynamic performance, characterized by comprising:
acquiring driving parameters of a vehicle in a driving process;
acquiring at least one detection parameter corresponding to the driving process according to the driving parameters, wherein the at least one detection parameter can reflect the maximum capacity of the vehicle for transporting articles or passengers;
acquiring a power performance parameter corresponding to the driving process according to the at least one detection parameter;
wherein the at least one detection parameter comprises one or more of the following parameters: the system comprises a high-speed performance parameter, an acceleration performance parameter and a climbing performance parameter, wherein the high-speed performance parameter is obtained by the ratio of a high-speed driving distance to a total driving distance, the acceleration performance parameter is obtained by comparing equivalent acceleration time with an acceleration time threshold, and the climbing performance parameter is obtained by comparing an equivalent climbing gradient with a climbing gradient threshold;
if the at least one detection parameter comprises a high speed performance parameter, the driving parameter comprises: the high-speed running distance refers to the running distance of which the vehicle speed is greater than a vehicle speed threshold value in the running process; if the at least one detection parameter comprises an acceleration performance parameter, the running process comprises an acceleration process, the running parameter comprises vehicle speeds corresponding to a plurality of moments in the acceleration process respectively, the equivalent acceleration time refers to a ratio of a speed change value to a first maximum acceleration, the speed change value is a speed difference between a preset initial vehicle speed and a preset finishing vehicle speed, and the first maximum acceleration is the acceleration with the largest value in the acceleration corresponding to the running process between every two adjacent moments according to the vehicle speeds corresponding to the plurality of moments in the acceleration process respectively; if at least one kind detects the parameter and includes climbing performance parameter, the course of traveling includes the climbing process, the parameter of traveling includes the speed of a motor vehicle that altitude difference and a plurality of moments in the climbing process correspond respectively, equivalent climbing slope is obtained according to the ratio of second maximum acceleration and acceleration of gravity and altitude difference and the ratio of distance of traveling, second maximum acceleration is according to the speed of a motor vehicle that a plurality of moments in the climbing process correspond respectively acquires the acceleration that the median is the biggest among the acceleration that the course of traveling between per two adjacent moments corresponds.
2. The detection method according to claim 1, wherein the obtaining of the high-speed performance parameters comprises:
acquiring corresponding total travel distance and travel distance with the vehicle speed larger than a vehicle speed threshold according to the vehicle speeds corresponding to the multiple moments in the travel process;
and acquiring the high-speed performance parameters according to the ratio of the travel distance of which the vehicle speed is greater than the vehicle speed threshold value to the total travel distance.
3. The detection method according to claim 1, wherein the accelerating performance parameter obtaining process comprises:
acquiring acceleration corresponding to the driving process between every two adjacent moments according to the speeds corresponding to the multiple moments in the acceleration process respectively;
acquiring the acceleration with the maximum value from the accelerations corresponding to the driving process between every two adjacent moments as a first maximum acceleration;
acquiring equivalent acceleration time according to the ratio of a speed change value and the first maximum acceleration, wherein the speed change value is the speed difference between a preset initial speed and a preset finishing speed;
obtaining the acceleration performance parameter by comparing the equivalent acceleration time to an acceleration time threshold; wherein the acceleration time threshold is associated with the preset initial vehicle speed and the end vehicle speed.
4. The detection method according to claim 3, wherein the acceleration time threshold comprises a first time threshold and a second time threshold, the second time threshold being greater than the first time threshold;
obtaining the acceleration performance parameter by comparing the equivalent acceleration time to an acceleration time threshold, including:
if Ta＞T2The acceleration performance parameter is 0;
if T1≤Ta≤T2The acceleration performance parameter is (T)2-Ta)/(T2-T1)；
If Ta＜T1The acceleration performance parameter is 1;
wherein, TaIs the equivalenceAcceleration time, T1Is the first time threshold, T2Is the second time threshold.
5. The detection method according to claim 1, wherein the obtaining process of the climbing performance parameter comprises:
acquiring acceleration corresponding to the driving process between every two adjacent moments according to the speeds corresponding to the multiple moments in the climbing process;
acquiring the acceleration with the largest numerical value from the accelerations corresponding to the driving process between every two adjacent moments as a second maximum acceleration;
obtaining an equivalent climbing slope according to the ratio of the second maximum acceleration to the gravity acceleration and the ratio of the altitude difference to the driving distance in the climbing process;
and comparing the equivalent climbing gradient with a climbing gradient threshold value to obtain the climbing performance parameter.
6. The detection method according to claim 5, wherein the climb gradient threshold includes a first gradient threshold and a second gradient threshold, the second gradient threshold being greater than the first gradient threshold;
through with equivalent climbing slope and climbing slope threshold value compare, acquire climbing performance parameter includes:
if αG＞α2The climbing performance parameter is 1;
if α1≤αG≤α2The climbing performance parameter is (α)G-α1)/(α2-α1)；
If αG＜α1The climbing performance parameter is 0;
wherein, αGFor the equivalent climbing gradient, α1The first gradient threshold value, α2Is the second slope threshold.
7. A detection device of a vehicle dynamic performance, characterized by comprising:
the driving parameter acquiring unit is used for acquiring driving parameters of the vehicle in the driving process;
the detection parameter acquisition unit is used for acquiring at least one detection parameter corresponding to the driving process according to the driving parameters, and the at least one detection parameter can reflect the maximum capacity of the vehicle for transporting articles or passengers;
the performance parameter acquisition unit is used for acquiring a power performance parameter corresponding to the driving process according to the at least one detection parameter;
wherein the at least one detection parameter comprises one or more of the following parameters: the system comprises a high-speed performance parameter, an acceleration performance parameter and a climbing performance parameter, wherein the high-speed performance parameter is obtained by the ratio of a high-speed driving distance to a total driving distance, the acceleration performance parameter is obtained by comparing equivalent acceleration time with an acceleration time threshold, and the climbing performance parameter is obtained by comparing an equivalent climbing gradient with a climbing gradient threshold;
if the at least one detection parameter comprises a high speed performance parameter, the driving parameter comprises: the high-speed running distance refers to the running distance of which the vehicle speed is greater than a vehicle speed threshold value in the running process; if the at least one detection parameter comprises an acceleration performance parameter, the running process comprises an acceleration process, the running parameter comprises vehicle speeds corresponding to a plurality of moments in the acceleration process respectively, the equivalent acceleration time refers to a ratio of a speed change value to a first maximum acceleration, the speed change value is a speed difference between a preset initial vehicle speed and a preset finishing vehicle speed, and the first maximum acceleration is the acceleration with the largest value in the acceleration corresponding to the running process between every two adjacent moments according to the vehicle speeds corresponding to the plurality of moments in the acceleration process respectively; if at least one kind detects the parameter and includes climbing performance parameter, the course of traveling includes the climbing process, the parameter of traveling includes the speed of a motor vehicle that altitude difference and a plurality of moments in the climbing process correspond respectively, equivalent climbing slope is obtained according to the ratio of second maximum acceleration and acceleration of gravity and altitude difference and the ratio of distance of traveling, second maximum acceleration is according to the speed of a motor vehicle that a plurality of moments in the climbing process correspond respectively acquires the acceleration that the median is the biggest among the acceleration that the course of traveling between per two adjacent moments corresponds.
8. The apparatus according to claim 7, wherein when acquiring the high speed performance parameter, the detection parameter acquiring unit is specifically configured to:
acquiring corresponding total travel distance and travel distance with the vehicle speed larger than a vehicle speed threshold according to the vehicle speeds corresponding to the multiple moments in the travel process;
and acquiring the high-speed performance parameters according to the ratio of the travel distance of which the vehicle speed is greater than the vehicle speed threshold value to the total travel distance.
9. The apparatus according to claim 7, wherein when acquiring the acceleration performance parameter, the detection parameter acquiring unit is specifically configured to:
acquiring acceleration corresponding to the driving process between every two adjacent moments according to the speeds corresponding to the multiple moments in the acceleration process respectively;
acquiring the acceleration with the maximum value from the accelerations corresponding to the driving process between every two adjacent moments as a first maximum acceleration;
acquiring equivalent acceleration time according to the ratio of a speed change value and the first maximum acceleration, wherein the speed change value is the speed difference between a preset initial speed and a preset finishing speed;
obtaining the acceleration performance parameter by comparing the equivalent acceleration time to an acceleration time threshold; wherein the acceleration time threshold is associated with the preset initial vehicle speed and the end vehicle speed.
10. The apparatus of claim 9, wherein the acceleration time threshold comprises a first time threshold and a second time threshold, the second time threshold being greater than the first time threshold;
when the acceleration performance parameter is obtained by comparing the equivalent acceleration time with an acceleration time threshold, the detection parameter obtaining unit is specifically configured to:
if Ta＞T2The acceleration performance parameter is 0;
if T1≤Ta≤T2The acceleration performance parameter is (T)2-Ta)/(T2-T1)；
If Ta＜T1The acceleration performance parameter is 1;
wherein, TaFor said equivalent acceleration time, T1Is the first time threshold, T2Is the second time threshold.
11. The apparatus according to claim 7, wherein when acquiring the climbing performance parameter, the detection parameter acquiring unit is specifically configured to:
acquiring acceleration corresponding to the driving process between every two adjacent moments according to the speeds corresponding to the multiple moments in the climbing process;
acquiring the acceleration with the largest numerical value from the accelerations corresponding to the driving process between every two adjacent moments as a second maximum acceleration;
obtaining an equivalent climbing slope according to the ratio of the second maximum acceleration to the gravity acceleration and the ratio of the altitude difference to the driving distance in the climbing process;
and comparing the equivalent climbing gradient with a climbing gradient threshold value to obtain the climbing performance parameter.
12. The apparatus of claim 11, wherein the hill climb gradient threshold comprises a first gradient threshold and a second gradient threshold, the second gradient threshold being greater than the first gradient threshold;
when the equivalent climbing gradient is compared with the climbing gradient threshold value to acquire the climbing performance parameter, the detection parameter acquisition unit is specifically used for:
if αG＞α2The climbing performance parameter is 1;
if α1≤αG≤α2The climbing performance parameter is (α)G-α1)/(α2-α1)；
If αG＜α1The climbing performance parameter is 0;
wherein, αGFor the equivalent climbing gradient, α1The first gradient threshold value, α2Is the second slope threshold.
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| CN109515444B (en) * | 2017-09-18 | 2021-02-26 | 百度在线网络技术（北京）有限公司 | Method and device for outputting driving performance index of unmanned automobile |
| CN108297871A (en) * | 2018-01-30 | 2018-07-20 | 潍柴动力股份有限公司 | A kind of the determination method, apparatus and electronic equipment of dynamic property |
| CN112525544B (en) * | 2020-11-12 | 2022-07-01 | 东风汽车集团有限公司 | Comparison method of vehicle acceleration performance parameters and related equipment |
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