CN113306562A - Vehicle speed checking method, device, equipment and storage medium - Google Patents
Vehicle speed checking method, device, equipment and storage medium Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
- B60W40/10—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to vehicle motion
- B60W40/105—Speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/10—Change speed gearings
- B60W2510/104—Output speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
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Abstract
The application relates to a vehicle speed checking method, a vehicle speed checking device, vehicle speed checking equipment and a storage medium, wherein the vehicle speed checking device comprises the following steps: obtaining a first vehicle speed according to the rotating speed of an output shaft of the gearbox; obtaining a second vehicle speed according to the relative speed of the wheels; if the difference value between the first vehicle speed and the second vehicle speed is not greater than the vehicle speed difference threshold value, or the difference value between the first vehicle speed and the second vehicle speed is greater than the vehicle speed difference threshold value, and the duration time is less than the time threshold value, displaying the first vehicle speed; and if the difference value between the first vehicle speed and the second vehicle speed is greater than the vehicle speed difference threshold value and the duration time is greater than the first time threshold value, displaying the first vehicle speed and displaying that the first vehicle speed is not credible. The first time threshold value is set as the transition time, the situation that the first vehicle speed is instantaneously changed due to the instantaneous error generated in the measurement process to report the error is filtered, and finally the compliance and the safety of the driver in the driving process are improved.
Description
Technical Field
The application relates to the field of automobile speed measurement and verification, in particular to a method, a device, equipment and a storage medium for vehicle speed verification.
Background
The vehicle speed signal is one of the most critical signals of the vehicle, and directly influences core power and safety related systems such as a brake system, an air bag, an engine, a gearbox and the like.
The conventional fuel vehicle is generally provided with a vehicle speed sensor and a wheel speed sensor, wherein the vehicle speed is calculated according to a signal of the vehicle speed sensor (or an odometer sensor), the vehicle speed sensor is generally arranged on an output shaft of a gearbox, square wave pulses are sent according to the rotating speed of the output shaft of the gearbox, namely the vehicle speed sensor sends out pulses with fixed number per revolution of the output shaft of the gearbox, and the vehicle speed sensors are generally of types such as 1 pulse/r, 4 pulse/r, 8 pulse/r and 16 pulse/r. The odometer receives a pulse signal sent by a vehicle speed sensor, calculates pulse frequency to obtain the rotating speed of an output shaft of the gearbox, and then calculates the vehicle speed by combining the transmission ratio of the transfer case, the transmission ratio of a rear axle (differential) and the rolling radius of a tire. In the automobile factory, the parameters of transfer case transmission ratio, rear axle (differential) transmission ratio and tire rolling radius are calculated as a final compensation parameter K, and are preset in the meter, so that the vehicle speed X is Y X K, wherein Y is the rotation speed of the output shaft of the transmission. The wheel speed sensor is a core sensor of an anti-lock braking system (ABS), and is installed on a wheel hub, generally 4 or 6, to detect the relative speed of the wheel.
The speed calculated by the traditional fuel vehicle according to the signal of the speed sensor (or the odometer sensor) is influenced by factors such as the type of the odometer sensor, the transmission ratio of a transfer case, the transmission ratio of a differential mechanism, the type of a tire, the slip rate of the tire and the like, the influence factors are excessive, the working environment of the commercial vehicle is severe, the maintenance frequency of the vehicle is relatively high, and the speed calculation of the odometer is directly influenced when relevant parts or systems are replaced. When the traditional fuel vehicle is influenced by factors such as the type of an odometer sensor, the transmission ratio of a transfer case, the transmission ratio of a differential mechanism, the type of a tire, the slip rate of the tire and the like, the judgment of a driver on the vehicle speed is directly influenced when the displayed vehicle speed value is inconsistent with the actual vehicle speed, the driving of the vehicle according to the standard is not facilitated, and potential safety hazards exist.
Disclosure of Invention
The embodiment of the application provides a vehicle speed checking method, a device, equipment and a storage medium, which aim to solve the problem that in the related technology, the vehicle speed obtained by the rotating speed of an output shaft of a gearbox is possibly inconsistent with the actual vehicle speed, so that a driver makes wrong judgments.
In a first aspect, the present application provides a vehicle speed checking method, which adopts the following technical scheme:
a vehicle speed checking method is characterized by comprising the following steps:
obtaining a first vehicle speed according to the rotating speed of an output shaft of the gearbox;
obtaining a second vehicle speed according to the relative speed of the wheels;
if the difference value between the first vehicle speed and the second vehicle speed is not larger than a vehicle speed difference threshold value, or the difference value between the first vehicle speed and the second vehicle speed is larger than the vehicle speed difference threshold value, and the duration time is smaller than a time threshold value, displaying the first vehicle speed;
and if the difference value between the first vehicle speed and the second vehicle speed is greater than a vehicle speed difference threshold value and the duration time is greater than a first time threshold value, displaying the first vehicle speed and displaying that the first vehicle speed is not credible.
Through the scheme, when the vehicle runs, the odometer displays the first vehicle speed obtained by calculating the rotating speed of the output shaft of the gearbox and simultaneously displays the second vehicle speed obtained by measuring and calculating the relative speed of the wheels, because the rotating speed of the output shaft of the gearbox is influenced by a plurality of transmission parts between the gearbox and the wheels when being converted into the actual vehicle speed of the vehicle, the deviation of the first vehicle speed relative to the actual vehicle speed is larger after the use conditions of the plurality of parts are changed, under the condition, the second vehicle speed provided by the scheme is only influenced by the wheels because the second vehicle speed is obtained through the relative speed of the wheels, under the condition that the vehicle can run normally, the second vehicle speed obtained through the relative speed of the wheels is more stable and accurate, and at the moment, whether the displayed first vehicle speed is in a more accurate range can be known by comparing the difference value of the first vehicle speed and the vehicle speed difference threshold value, the driver can accurately master the current speed, meanwhile, when each part in the vehicle has problems and the authenticity of the first speed is influenced, the difference value of the two exceeds the speed difference threshold value, the driver can be reminded through the method after the duration time is longer than the first time threshold value, the driver can be aware of the problem condition of the current vehicle and can adjust as early as possible, the set first time threshold value is used as the transition time, the condition that the first speed is instantaneously changed due to instantaneous errors during measurement can be effectively filtered, the misstatement can be finally and obviously improved, the compliance and the safety of the driver in the driving process can be finally improved, the states of part of the vehicle can be known, the maintenance can be carried out as early as possible after the vehicle has problems, the problem part is prevented from being further damaged and the service life of the vehicle is prevented from being influenced, and the practical significance is great. Meanwhile, the value selection of the vehicle speed difference threshold value and the first time threshold value can be adaptively selected according to the actual condition and the service environment of the vehicle, so that the vehicle speed can be checked to different degrees under vehicles with different requirements, and the method has very remarkable practicability.
In some embodiments, said deriving a first vehicle speed based on a transmission output shaft speed comprises:
and obtaining a first vehicle speed according to the compensation coefficient of the rotating speed of the output shaft of the gearbox relative to the vehicle speed and the rotating speed of the output shaft of the gearbox.
According to the scheme, the compensation coefficient of the rotating speed of the output shaft of the gearbox relative to the vehicle speed is calculated according to the actual vehicle speed and the rotating speed of the output shaft of the gearbox during off-line calibration and detection of the vehicle, and then the compensation coefficient is preset into the vehicle, the corresponding first vehicle speed is automatically and rapidly calculated according to the rotating speed of the output shaft of the gearbox in real time, and the current vehicle speed of the vehicle in a normal state can be reflected, and comparison and verification of the vehicle speed can be conducted subsequently.
In some embodiments, the obtaining the second vehicle speed according to the wheel relative speed includes:
and obtaining a second vehicle speed according to the compensation coefficient of the relative speed of the wheels to the vehicle speed and the relative speed of the wheels.
According to the scheme, the compensation coefficient of the relative speed of the wheels to the vehicle speed is calculated according to the actual vehicle speed and the relative rotating speed of the wheels during off-line calibration and detection of the vehicle, and is preset in the vehicle, so that the actual second vehicle speed can be quickly obtained through the relative rotating speed of the wheels during running of the vehicle, and because the measured relative rotating speed of the wheels is only related to the state of the tires when being converted into the actual vehicle speed, when the tires of the vehicle can normally meet normal running, the error between the actual vehicle speed and the second vehicle speed calculated by utilizing the relative rotating speed of the wheels can be in a minimum range, so that the actual vehicle speed can be effectively reflected by the second vehicle speed, and the second vehicle speed is further compared with the first vehicle speed, so that the validity of the first vehicle speed can be judged, and whether the states of a plurality of components between the output shaft of the gearbox of the vehicle and the wheels have problems or not can be reflected.
In some embodiments, the wheel measured in measuring the wheel speed to obtain the wheel relative speed is a non-driving wheel of the vehicle.
Through the scheme, the non-driving wheel is closer to the real driving speed of the vehicle compared with the driving wheel without slipping, so that the non-driving wheel is closer to the real speed of the vehicle at the moment when the relative speed of the wheel is measured and the second vehicle speed is calculated, and the vehicle speed can be checked to be judged by a driver.
In some embodiments, the wheel relative speed is an average of the left and right wheel relative speeds.
Through the scheme, the measured relative speed of the wheel is more accurate, and the wheel is closer to the real speed of the vehicle at the moment when the second vehicle speed is obtained through calculation, so that the vehicle speed can be checked to be judged by a driver.
In some embodiments, further comprising:
and if the difference value of the first vehicle speed and the second vehicle speed is greater than a vehicle speed difference threshold value and the duration time is greater than a second time threshold value, displaying the second vehicle speed.
Through the scheme, the display of the second vehicle speed can be automatically carried out after the second time threshold when the first vehicle speed is continuously unreliable in the first time threshold and the current vehicle cannot be stopped for processing (or a driver does not notice a prompt signal), so that the safety of the follow-up vehicle is guaranteed, the control of the vehicle speed is in compliance, the guarantee is brought to the driver, meanwhile, the selection of the second time threshold value can be set as required, the vehicle speed check and correction of the vehicle can be conveniently carried out under different environments and requirements, and the practicability of the vehicle in the end use process of the application is improved.
In some embodiments, the vehicle speed difference threshold is no greater than 10 km/h.
Through the scheme, the overlarge difference value between the first vehicle speed displayed by the odometer and the actual vehicle speed of the vehicle is avoided, and the purposes of improving the compliance and the safety in the driving process are achieved.
In a second aspect, the present application provides a vehicle speed calibration apparatus, which adopts the following technical scheme:
a vehicle speed checking device, comprising:
a transmission output shaft rotation speed acquisition unit configured to acquire a transmission output shaft rotation speed of the vehicle;
a wheel relative speed acquisition unit configured to acquire a wheel relative speed of the vehicle;
a conversion unit configured to convert the rotational speed of the transmission output shaft into a first vehicle speed and convert the wheel relative speed into a second vehicle speed;
and the verification display unit is configured to judge the vehicle speed required to be displayed and whether to carry out vehicle speed incredible reminding or not based on the first vehicle speed and the second vehicle speed.
In a third aspect, the present application provides a vehicle speed checking device, which adopts the following technical scheme:
a vehicle speed checking apparatus, comprising: a memory, a processor and a vehicle speed verification program stored on the memory and executable on the processor, the vehicle speed verification program being configured to implement the steps of the vehicle speed verification method as described above.
In a fourth aspect, the present application provides a storage medium, which adopts the following technical solutions:
a storage medium non-transitory storing computer readable instructions which, when executed by a computer, may perform a vehicle speed verification method as described above.
The beneficial effect that technical scheme that this application provided brought includes:
the embodiment of the application provides a vehicle speed checking method and a vehicle speed measuring and automatic checking system, because the second vehicle speed provided by the scheme is obtained through the relative speed of the wheels, the influence between the speed and the actual speed is only influenced by the wheels, the second speed obtained by the relative speed of the wheels is more stable and accurate under the state that the vehicle can normally run, at the moment, the difference value between the first speed and the second speed is compared to know whether the displayed first speed is accurate or not, namely within the vehicle speed difference threshold value, so that the driver can accurately master the current vehicle speed, and when the authenticity of the first vehicle speed is influenced due to the problems of various parts in the vehicle, after the difference value of the two exceeds the vehicle speed difference threshold value and the duration time exceeds the first time threshold value, the driver can be reminded through the odometer, so that the driver can realize that the current vehicle has a problem and can adjust as early as possible; meanwhile, the set first time threshold value is used as the transition time, so that the situation of false alarm caused by instantaneous change of the first vehicle speed due to possible instantaneous error in the measurement process of the filtering device can be effectively eliminated, the compliance and the safety of a driver in the driving process are finally improved remarkably, the states of parts of the vehicle can be known, the vehicle can be maintained as early as possible after the vehicle is known to have problems, the problem parts are prevented from being further damaged, the service life of the vehicle is prevented from being influenced, and the method has great practical significance. Meanwhile, the value selection of the vehicle speed difference threshold value and the first time threshold value can be adaptively selected according to the actual condition and the service environment of the vehicle, so that the vehicle speed can be checked to different degrees under vehicles with different requirements, and the method has very remarkable practical significance.
Drawings
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 it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a hardware configuration of a vehicle speed checking device according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart diagram illustrating a vehicle speed checking method according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating step S10 according to an embodiment of the vehicle speed checking method of the present invention;
FIG. 4 is a flowchart illustrating step S20 according to an embodiment of the vehicle speed checking method of the present invention;
FIG. 5 is a functional block diagram of an embodiment of the vehicle speed calibration apparatus of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, 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 some embodiments of the present application, but not all 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.
The embodiment of the application provides a vehicle speed checking method, a device, equipment and a storage medium, which can solve the problem that in the related technology, the vehicle speed obtained by the rotating speed of an output shaft of a gearbox is possibly inconsistent with the actual vehicle speed, so that a driver makes an incorrect judgment.
Referring to fig. 1, fig. 1 is a schematic device structure diagram of a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the apparatus may include: a processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., a Wi-Fi interface). The memory 1005 may be a high-speed RAM memory or a Non-volatile memory (Non-volatile memory), such as a disk memory. The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the configuration of the apparatus shown in fig. 1 is not intended to be limiting of the apparatus and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a storage medium, may include therein an operating system, a network communication module, a user interface module, and a vehicle speed check program. The device of the present invention may call the vehicle speed verification program stored in the memory 1005 through the processor 1001, and execute the vehicle speed verification method provided in the embodiments of the present application.
In a second aspect, the present application provides a vehicle speed verification method.
Referring to fig. 2, fig. 2 is a schematic flow chart of an embodiment of a method for checking a requested vehicle speed. The vehicle speed checking method comprises the following steps:
s10, obtaining a first vehicle speed according to the rotating speed of the output shaft of the gearbox;
s20, obtaining a second vehicle speed according to the relative speed of the wheels;
s31, if the difference value between the first vehicle speed and the second vehicle speed is not larger than a vehicle speed difference threshold value, or the difference value between the first vehicle speed and the second vehicle speed is larger than the vehicle speed difference threshold value, and the duration time is smaller than a time threshold value, displaying the first vehicle speed;
and S32, if the difference value between the first vehicle speed and the second vehicle speed is greater than the vehicle speed difference threshold value and the duration time is greater than a first time threshold value, displaying the first vehicle speed and displaying that the first vehicle speed is not credible.
Specifically, when the vehicle runs, the odometer displays a first vehicle speed obtained by calculating the rotating speed of the output shaft of the gearbox and simultaneously displays a second vehicle speed obtained by measuring and calculating the relative speed of the wheels, because the rotating speed of the output shaft of the gearbox is influenced by a plurality of transmission components between the gearbox and the wheels when being converted into the actual vehicle speed of the vehicle, the deviation of the first vehicle speed relative to the actual vehicle speed is larger after the use conditions of the components are changed, under the condition, the second vehicle speed provided by the scheme is obtained through the relative speed of the wheels and is only influenced by the wheels with the actual vehicle speed, under the condition that the vehicle can run normally, the second vehicle speed obtained through the relative speed of the wheels is more stable and accurate, and at the moment, whether the displayed first vehicle speed is in a more accurate range can be known by comparing the difference value of the two vehicle speed with the vehicle speed difference threshold value, the driver can accurately master the current speed, meanwhile, when each part in the vehicle has problems and the authenticity of the first speed is influenced, the difference value of the two exceeds the speed difference threshold value, the driver can be reminded through the method after the duration time is longer than the first time threshold value, the driver can be aware of the problem condition of the current vehicle and can adjust as early as possible, the set first time threshold value is used as the transition time, the condition that the first speed is instantaneously changed due to instantaneous errors during measurement can be effectively filtered and filtered, the misinformation is carried out, finally, the compliance and the safety of the driver in the driving process are obviously improved, the states of part of the vehicle can be known, meanwhile, the maintenance can be carried out as early as possible after the vehicle has problems, the problem parts are prevented from being further damaged and the service life of the vehicle is prevented from being influenced, and the method has great practical significance. Meanwhile, the value selection of the vehicle speed difference threshold value and the first time threshold value can be adaptively selected according to the actual condition and the service environment of the vehicle, so that the vehicle speed can be checked to different degrees under vehicles with different requirements, and the method has very remarkable practicability.
Further, referring to fig. 3, the step S10 includes the following steps:
s11, acquiring the rotating speed of the output shaft of the gearbox;
and S12, obtaining a first vehicle speed according to the compensation coefficient of the rotating speed of the output shaft of the gearbox relative to the vehicle speed and the rotating speed of the output shaft of the gearbox.
Further, referring to fig. 4, the obtaining the second vehicle speed according to the wheel relative speed includes the following steps:
s21, obtaining the relative speed of the wheels;
and S22, obtaining a second vehicle speed according to the compensation coefficient of the relative speed of the wheels to the vehicle speed and the relative speed of the wheels.
In this embodiment, the compensation coefficient of the rotational speed of the output shaft of the transmission relative to the vehicle speed and the compensation coefficient of the relative speed of the wheels relative to the vehicle speed are both obtained through vehicle offline calibration and detection, specifically, in the detection process, the measured rotational speed of the output shaft of the transmission and the measured relative speed of the wheels at the same time are respectively subjected to ratio to the actual vehicle speed of the vehicle, that is, the compensation coefficient of the rotational speed of the output shaft of the transmission relative to the vehicle speed is equal to the actual vehicle speed/the rotational speed of the output shaft of the transmission and the compensation coefficient of the relative speed of the wheels relative to the vehicle speed is equal to the actual vehicle speed/the relative speed of the wheels relative to the vehicle speed. And then respectively obtaining a compensation coefficient of the rotating speed of the output shaft of the gearbox relative to the vehicle speed and a compensation coefficient of the relative speed of the wheels relative to the vehicle speed, and presetting the compensation coefficients into the vehicle. In subsequent practical use, the method calculates the product of the compensation coefficient of the rotating speed of the output shaft of the gearbox relative to the vehicle speed and the measured rotating speed of the output shaft of the real-time gearbox to obtain a first vehicle speed, and calculates the product of the compensation coefficient of the relative speed of the wheels relative to the vehicle speed and the measured relative speed of the wheels in real time to obtain a second vehicle speed.
Specifically, on one hand, the compensation coefficient of the rotating speed of the output shaft of the gearbox relative to the vehicle speed is calculated according to the actual vehicle speed and the rotating speed of the output shaft of the gearbox during off-line calibration and detection of the vehicle, and then the compensation coefficient is preset into a speedometer of the vehicle, and the corresponding first vehicle speed is automatically and rapidly calculated according to the rotating speed of the output shaft of the gearbox in real time, so that the current vehicle speed of the vehicle in a normal state can be reflected, and the vehicle speed can be compared and checked subsequently. However, the calculated compensation coefficient of the rotational speed of the output shaft of the gearbox relative to the vehicle speed is a calculated fixed value of each component between the output shaft of the gearbox and the wheel in the vehicle in a standard state, and then the first vehicle speed calculated in the step S12 can only reflect a theoretical vehicle speed obtained when the current rotational speed of the output shaft of the gearbox of the vehicle is in the standard state, when the components are worn due to long-time use or have problems due to other factors, the compensation coefficient of the actual rotational speed of the output shaft of the gearbox relative to the vehicle speed at the moment is inconsistent with the preset value, and further the deviation exists between the first vehicle speed and the actual vehicle speed at the moment.
On the other hand, the compensation coefficient of the relative rotating speed of the wheels relative to the vehicle speed is calculated according to the actual vehicle speed and the relative rotating speed of the wheels when the vehicle is calibrated and detected off line, and is preset in a mileage device of the vehicle to realize that the corresponding second vehicle speed can be automatically calculated according to the relative rotating speed of the wheels detected at the wheels, since the compensation coefficient of the relative rotational speed of the wheels with respect to the vehicle speed is fixed, and the influence factor of the second vehicle speed is only the relative rotational speed of the wheels, that is, the second vehicle speed is affected only by the wheel state, and for a vehicle in normal running, the wheel state is stable, so that the error between the final second vehicle speed and the actual vehicle speed is small, the actual speed of a current vehicle can be effectively reflected, the form of the vehicle is directly influenced when the state of the wheel is poor, the wheel is necessarily replaced or maintained by a driver at the moment, and then the second speed of the vehicle can be regarded as the actual speed of the vehicle running normally. Finally, the accuracy of the first vehicle speed can be obtained by comparing the first vehicle speed with the second vehicle speed and judging the difference value of the first vehicle speed and the second vehicle speed, so that a driver can conveniently master the current driving condition and know whether the states of a plurality of parts between the output shaft of the vehicle gearbox and the wheels are in a problem.
Further, the wheel rotating speed is measured to obtain the wheel measured in the wheel relative speed, wherein the wheel is the non-driving wheel of the vehicle.
Specifically, the non-driving wheel is closer to the real driving speed of the vehicle than the driving wheel without slipping, so that the non-driving wheel is closer to the real speed of the vehicle when the relative speed of the wheel is measured and the second speed is calculated, and the vehicle speed can be checked to be judged by a driver.
Further, the wheel relative speed is an average value of the relative speeds of the left wheel and the right wheel.
Specifically, the relative speed of the wheels obtained by the measured group of wheels is more accurate, and then the actual speed of the vehicle is closer to the current time when the second vehicle speed is obtained through calculation, so that the vehicle speed can be checked to be judged by a driver.
Further, referring to fig. 2, the vehicle speed verification method provided by the present application further includes:
and S40, if the difference value between the first vehicle speed and the second vehicle speed is greater than the vehicle speed difference threshold value and the duration time is greater than a second time threshold value, displaying the second vehicle speed.
Specifically, when the first vehicle speed is continuously unreliable within the second time threshold value and the current vehicle cannot be stopped for processing in time (or the driver does not notice a prompt signal), the second vehicle speed is displayed after the duration time is greater than the second time threshold value, so that the safety of the follow-up vehicle is guaranteed, the vehicle speed is controlled in a compliant manner, the guarantee is brought to the driver, meanwhile, the value selection of the second time threshold value can be set as required, the vehicle speed check and correction of the vehicle can be conveniently carried out under different environments and requirements, and the practicability of the vehicle in the end use process is improved.
In this embodiment, the first time threshold is specifically set to 2min, that is, after the difference between the second vehicle speed and the first vehicle speed is greater than the vehicle speed difference threshold and lasts for 2min, it is indicated that the second vehicle speed is not reliable. The second time threshold is specifically set to 10min, that is, after the difference between the second vehicle speed and the first vehicle speed is greater than the vehicle speed difference threshold and lasts for 10min, the odometer 3 switches the displayed first vehicle speed to the second vehicle speed.
Specifically, when the deviation between the first vehicle speed and the actual vehicle speed is large relative to the second vehicle speed, the first vehicle speed can be corrected to the second vehicle speed quickly, and then the possibility that the driving of a driver is in a problem in the period of time due to the fact that the corrected vehicle speed is too slow when the value of the second time threshold is too large is reduced. Meanwhile, the set first time threshold is used as transition time, so that the situation of false alarm caused by the fact that the first vehicle speed is instantaneously changed due to possible instantaneous error during measurement is effectively filtered. The first time threshold is regulated to be less than 2min, so that the driver can be reminded more quickly under the condition that the first vehicle speed continuously has larger deviation relative to the actual vehicle speed, and the safety of the vehicle during running is improved.
Further, the vehicle speed difference threshold value is not more than 10 km/h.
In the present embodiment, the vehicle speed difference threshold is specifically set to 10km/h, i.e., the timing of the duration and the subsequent operation will be performed after the difference between the second vehicle speed and the first vehicle speed is greater than 10 km/h.
Specifically, the overlarge difference between the displayed vehicle speed and the actual vehicle speed is avoided, and the compliance and the safety in the driving process are improved.
In a third aspect, an embodiment of the present application further provides a vehicle speed calibration device, which includes a transmission output shaft rotation speed obtaining unit, a wheel relative speed obtaining unit, a conversion unit, and a calibration display unit. Wherein the transmission output shaft rotation speed acquisition unit is configured to acquire a transmission output shaft rotation speed of the vehicle; the wheel relative speed acquisition unit is configured to acquire a wheel relative speed of the vehicle; the conversion unit is configured to convert the rotation speed of the output shaft of the gearbox into a first vehicle speed and convert the relative speed of the wheels into a second vehicle speed; the verification display unit is configured to judge the vehicle speed required to be displayed and whether to prompt the vehicle speed in an unreliable mode based on the difference value between the first vehicle speed and the second vehicle speed.
In this embodiment, the transmission output shaft rotation speed obtaining unit is specifically a vehicle speed sensor installed at an output shaft of a vehicle transmission, the wheel relative speed obtaining unit is specifically a wheel speed sensor installed on a hub of a driven wheel of the vehicle, and the converting unit and the calibration display unit are specifically odometers of the vehicle. The speed sensor and the wheel speed sensor are electrically connected with a vehicle odometer to realize data transmission.
In a fourth aspect, the embodiment of the present invention further provides a readable storage medium.
The readable storage medium of the present invention stores a vehicle speed checking program, wherein the vehicle speed checking program, when executed by the processor, implements the steps of the vehicle speed checking method as described above. The method implemented when the vehicle speed checking program is executed may refer to various embodiments of the vehicle speed checking method provided in the present application, and details thereof are not repeated herein.
The working principle and the beneficial effects of the application are as follows: the second vehicle speed provided by the scheme is obtained through the relative speed of the wheels, and is only influenced by the wheels with the actual vehicle speed, under the state that the vehicle can normally run, the second vehicle speed obtained through the relative speed of the wheels is more stable and accurate, at the moment, the difference value of the second vehicle speed and the actual vehicle speed is compared to obtain whether the displayed first vehicle speed is in a more accurate range, namely, within a vehicle speed difference threshold value, so that a driver can accurately master the current vehicle speed, and meanwhile, when the authenticity of the first vehicle speed is influenced due to the fact that various parts in the vehicle have problems, the difference value of the second vehicle speed and the actual vehicle speed exceeds the vehicle speed difference threshold value and can remind the driver after lasting for the first time threshold value time, so that the driver can realize that the current vehicle has problems and can adjust as early as well; meanwhile, the set first time threshold value is used as the transition time, so that the situation of false alarm caused by instantaneous change of the first vehicle speed due to possible instantaneous error in the measurement process of the filtering device can be effectively eliminated, the compliance and the safety of a driver in the driving process are finally improved remarkably, the states of parts of the vehicle can be known, the vehicle can be maintained as early as possible after the vehicle is known to have problems, the problem parts are prevented from being further damaged, the service life of the vehicle is prevented from being influenced, and the method has great practical significance. Meanwhile, the value selection of the vehicle speed difference threshold value and the first time threshold value can be adaptively selected according to the actual condition and the service environment of the vehicle, so that the vehicle speed can be checked to different degrees under vehicles with different requirements, and the method has very remarkable practicability.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for causing a terminal device to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A vehicle speed checking method is characterized by comprising the following steps:
obtaining a first vehicle speed according to the rotating speed of an output shaft of the gearbox;
obtaining a second vehicle speed according to the relative speed of the wheels;
if the difference value between the first vehicle speed and the second vehicle speed is not larger than a vehicle speed difference threshold value, or the difference value between the first vehicle speed and the second vehicle speed is larger than the vehicle speed difference threshold value, and the duration time is smaller than a time threshold value, displaying the first vehicle speed;
and if the difference value between the first vehicle speed and the second vehicle speed is greater than a vehicle speed difference threshold value and the duration time is greater than a first time threshold value, displaying the first vehicle speed and displaying that the first vehicle speed is not credible.
2. The vehicle speed verification method of claim 1, wherein said deriving a first vehicle speed from a transmission output shaft speed comprises the steps of:
and obtaining a first vehicle speed according to the compensation coefficient of the rotating speed of the output shaft of the gearbox relative to the vehicle speed and the rotating speed of the output shaft of the gearbox.
3. The vehicle speed verification method according to claim 1, wherein the obtaining of the second vehicle speed based on the wheel relative speed comprises the steps of:
and obtaining a second vehicle speed according to the compensation coefficient of the relative speed of the wheels to the vehicle speed and the relative speed of the wheels.
4. The vehicle speed verification method according to claim 3, wherein the wheel measured in the wheel relative speed obtained by measuring the wheel rotation speed is a non-driving wheel of the vehicle.
5. The vehicle speed verification method according to claim 4, wherein the wheel relative speed is an average of left and right wheel relative speeds.
6. The vehicle speed checking method according to claim 1, characterized by further comprising:
and if the difference value of the first vehicle speed and the second vehicle speed is greater than a vehicle speed difference threshold value and the duration time is greater than a second time threshold value, displaying the second vehicle speed.
7. The vehicle speed verification method according to claim 1, wherein the vehicle speed difference threshold is not greater than 10 km/h.
8. A vehicle speed checking device is characterized by comprising:
a transmission output shaft rotation speed acquisition unit configured to acquire a transmission output shaft rotation speed of the vehicle;
a wheel relative speed acquisition unit configured to acquire a wheel relative speed of the vehicle;
a conversion unit configured to convert the rotational speed of the transmission output shaft into a first vehicle speed and convert the wheel relative speed into a second vehicle speed;
and the verification display unit is configured to judge the vehicle speed required to be displayed and whether to prompt the vehicle speed in an unreliable way based on the difference value between the first vehicle speed and the second vehicle speed.
9. A vehicle speed checking apparatus, characterized by comprising: a memory, a processor and a vehicle speed verification program stored on the memory and executable on the processor, the vehicle speed verification program being configured to implement the steps of the vehicle speed verification method as claimed in any one of claims 1 to 7.
10. A storage medium storing non-transitory computer readable instructions which, when executed by a computer, perform a method of vehicle speed verification as claimed in any one of claims 1 to 7.
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| CN202110716335.3A CN113306562A (en) | 2021-06-25 | 2021-06-25 | Vehicle speed checking method, device, equipment and storage medium |
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| CN202110716335.3A CN113306562A (en) | 2021-06-25 | 2021-06-25 | Vehicle speed checking method, device, equipment and storage medium |
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Application publication date: 20210827 |