CN115008953A - Tire pressure monitoring method, system, electronic device, and computer-readable storage medium - Google Patents
Tire pressure monitoring method, system, electronic device, and computer-readable storage medium Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/06—Signalling devices actuated by deformation of the tyre, e.g. tyre mounted deformation sensors or indirect determination of tyre deformation based on wheel speed, wheel-centre to ground distance or inclination of wheel axle
- B60C23/061—Signalling devices actuated by deformation of the tyre, e.g. tyre mounted deformation sensors or indirect determination of tyre deformation based on wheel speed, wheel-centre to ground distance or inclination of wheel axle by monitoring wheel speed
- B60C23/062—Frequency spectrum analysis of wheel speed signals, e.g. using Fourier transformation
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Abstract
The present application provides a tire pressure monitoring method, system, electronic device and computer readable storage medium, which may include: respectively acquiring pulse values of a plurality of tires of a target vehicle to obtain a plurality of pulse acquisition values; analyzing the pulse acquisition values respectively to obtain the actual tire pressure state of each tire; and updating the initial alarm information according to the actual tire pressure state. After the initial alarm information is sent, the adaptive monitoring mode is selected according to the number of the tires in the normal tire pressure state to continuously monitor the tire pressure state of the target vehicle, and when the tires in the abnormal tire pressure state do not exist in the subsequent monitoring process, the initial alarm information is automatically removed, so that the effects of relieving the user panic and improving the driving experience are achieved.
Description
Technical Field
The present application relates to the field of intelligent driving technologies, and in particular, to a tire pressure monitoring method, a tire pressure monitoring system, an electronic device, and a computer-readable storage medium.
Background
The tire pressure monitoring system is a system for monitoring tire pressure in real time and giving an alarm when an abnormality occurs, and plays a crucial role in preventing tire burst. The tire pressure monitoring system is divided into a direct tire pressure monitoring mode and an indirect tire pressure monitoring mode, wherein the direct tire pressure monitoring mode is that a tire pressure value is monitored through a tire pressure sensor arranged in four tires, and information about whether the tire pressure is normal or not is provided for a vehicle; the indirect tire pressure monitoring mode is that the relative difference value of the tire pressure is calculated through a tire pressure monitoring algorithm according to the wheel speed values of wheel speed sensors in four tires, and information about whether the tire pressure is normal or not is provided for a vehicle. However, the direct tire pressure monitoring method requires an additional sensor, which results in higher use cost. The indirect tire pressure monitoring mode does not need to add other equipment, obtains wheel speed signals through a wheel speed sensor in an automobile braking anti-lock system, completes a series of algorithms and can realize tire pressure monitoring, and therefore the indirect tire pressure monitoring method is widely applied.
However, the indirect tire pressure monitoring method is to determine whether the tire is in a short-air state by using the collected wheel speed value through wheel radius analysis and wheel spectrum analysis, which has higher requirements on the tire and the external driving environment. For example, the inherent characteristics of the tire, the difference between the inner and outer wheel speeds caused by the curved road running, the change of the external air pressure in the high-temperature plateau, the loading of heavy objects in the trunk, the long-time small-amplitude slope (mountain road) running and the like all have great influence on the monitoring result of the indirect tire pressure monitoring mode, and the false alarm is easily caused, namely, the alarm signal is sent out when the tire pressure is normal. In other words, the indirect tire pressure monitoring method in the related art is greatly influenced by the environment, the accuracy of the monitoring result is not high, and if the alarm signal is not automatically released, panic of the user is caused, and the use experience of the user is also reduced.
Disclosure of Invention
The present application is directed to solving, at least to some extent, one of the technical problems in the related art. To this end, an object of the present application is to provide a tire pressure monitoring method, system, electronic device, and computer-readable storage medium capable of continuously monitoring a tire pressure state to eliminate false alarm information.
One aspect of the present application provides a tire pressure monitoring method, which may include: respectively acquiring pulse values of a plurality of tires of a target vehicle to obtain a plurality of pulse acquisition values; analyzing the pulse acquisition values respectively to obtain the actual tire pressure state of each tire; and updating the initial alarm information according to the actual tire pressure state.
In some embodiments, before acquiring the pulse values of the plurality of tires of the target vehicle, respectively, and obtaining the plurality of pulse acquisition values, the method may include: and acquiring the number of the tires with normal tire pressure states in the target vehicle according to the initial tire pressure alarm information.
In some embodiments, analyzing the plurality of pulse acquisition values to obtain the actual tire pressure status of each tire may include: when at least one normal tire exists in the target vehicle, acquiring pulse values of the tires by a wheel speed sensor; calculating a pulse correction coefficient of each tire according to each pulse value; determining a pulse standard value of each tire based on the pulse correction coefficient; carrying out averaging processing on each pulse standard value to obtain a pulse standard average value; determining an actual error value between the pulse standard value and the pulse standard mean value of each tire by using an error formula; and comparing the actual error value with a predetermined error threshold value to determine an actual tire pressure state of the tire, wherein the actual tire pressure state comprises a normal tire pressure state and an abnormal tire pressure state.
In some embodiments, the error formula is:
wherein M is is A pulse standard value of each tire is indicated,
is the standard mean of the pulses.
In some embodiments, after comparing the actual error value to the predetermined error threshold value to determine the actual tire pressure state of the tire, may include: the number of tires having a normal tire pressure state in the target vehicle is acquired.
In some embodiments, analyzing the plurality of pulse acquisition values to obtain the actual tire pressure status of each tire may include: collecting a plurality of pulse values of each tire by a wheel speed sensor; processing the plurality of pulse values by using a least square method to obtain a plurality of wheel speed target values; drawing a wheel speed curve of the target vehicle based on the plurality of wheel speed target values, wherein the wheel speed curve is used for representing the relationship between the wheel speed target values of the target vehicle and time; collecting a plurality of wheel speed target values in a wheel speed curve by using an interpolation method; converting the wheel speed target value from a time domain to a frequency domain by utilizing Fourier transform; acquiring the frequency corresponding to the wheel speed target value, and determining the preset frequency range of the wheel speed target value; and comparing the frequency corresponding to the wheel speed target value with a preset frequency range to determine the actual tire pressure state of the tire, wherein the actual tire pressure state comprises a normal tire pressure state and an abnormal tire pressure state.
In some embodiments, updating the initial alarm information according to the actual tire pressure state may include: and updating the initial alarm information to alarm release when the actual tire pressure states of the plurality of tires of the target vehicle do not have abnormal tire pressure states.
Another aspect of the present application also provides a tire pressure monitoring system, which may include: the device comprises an acquisition module, an analysis module and an updating module. The acquisition module is used for respectively acquiring the pulse values of a plurality of tires of the target vehicle to obtain a plurality of pulse acquisition values. The analysis module is used for analyzing the pulse acquisition values respectively to obtain the actual tire pressure state of each tire. The updating module is used for updating the initial alarm information according to the actual tire pressure state.
Yet another aspect of the present application provides an electronic device, which may include a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor executes the program to implement the tire pressure monitoring method according to any of the above embodiments.
Yet another aspect of the present application also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the tire pressure monitoring method described in any of the above embodiments.
According to the technical scheme of the embodiment, at least the following beneficial effects can be obtained.
According to the tire pressure monitoring method, the system, the electronic equipment and the computer readable storage medium, after initial alarm information is sent out, the adaptive monitoring mode is selected according to the number of the tires in the normal tire pressure state to continuously monitor the tire pressure state of the target vehicle, and when the tires in the abnormal tire pressure state do not exist in the subsequent monitoring process, the initial alarm information is automatically removed, so that the effects of relieving the user panic and improving the driving experience are achieved.
Drawings
FIG. 1 is a flow chart of a tire pressure monitoring method according to one aspect of the present application;
FIG. 2 is a block diagram of a tire pressure monitoring system according to another aspect of the present application;
FIG. 3 is a schematic diagram of an electronic device architecture according to yet another aspect of the present application; and
FIG. 4 is a schematic diagram of a computer-readable storage medium structure according to yet another aspect of the present application.
Detailed Description
For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.
It should be noted that in this specification the expressions first, second, third etc. are only used to distinguish one feature from another, and do not indicate any limitation of features, in particular any order of precedence. Thus, a first class of documents discussed in this application may also be referred to as a second class of documents and a first class of documents may also be referred to as a second class of documents and vice versa without departing from the teachings of this application.
In the drawings, the thickness, size, and shape of the components have been slightly adjusted for convenience of explanation. The figures are purely diagrammatic and not drawn to scale. As used herein, the terms "approximately", "about" and the like are used as table-approximating terms and not as table-degree terms, and are intended to account for inherent deviations in measured or calculated values that would be recognized by one of ordinary skill in the art.
It will be further understood that terms such as "comprising," "including," "having," "including," and/or "containing," when used in this specification, are open-ended and not closed-ended, and specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Furthermore, when a statement such as "at least one of" appears after a list of listed features, it modifies that entire list of features rather than just individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.
Unless otherwise defined, all terms (including engineering and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. In addition, unless explicitly defined or contradicted by context, the specific steps included in the methods described herein are not necessarily limited to the order described, but can be performed in any order or in parallel. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In the indirect tire pressure monitoring mode, a tire pressure sensor is not required to be arranged at a wheel of a target vehicle, instead, a wheel speed sensor collects rotating pulses, then the wheel speed value of the wheel is calculated, and then the wheel speed value is analyzed by a radius method and a spectrum method, and finally the tire pressure state of the tire is obtained. The realization cost of indirect tire pressure monitoring mode is low, but the requirement to tire external environment is higher, consequently produces the wrong report police easily, triggers alarm information under the normal condition of the actual tire pressure state of tire promptly. Based on this, the application provides a tire pressure monitoring method, after triggering alarm information, continuously monitors the tire pressure state, aims at obtaining the actual tire pressure state of the tire, updates the alarm information, and avoids false alarm from causing panic to a user.
Fig. 1 is a flow chart of a tire pressure monitoring method according to one aspect of the present application.
As shown in fig. 1, an aspect of the present application provides a tire air pressure monitoring method, which may include: respectively acquiring pulse values of a plurality of tires of a target vehicle to obtain a plurality of pulse acquisition values; analyzing the pulse acquisition values respectively to obtain the actual tire pressure state of each tire; and updating the initial alarm information according to the actual tire pressure state.
In some embodiments, initial warning information is received, wherein the initial warning information is used for representing a result of a tire pressure abnormal state occurring for the first time in an indirect tire pressure monitoring process. Further, the number of tires with normal tire pressure states in the target vehicle is obtained according to the initial tire pressure alarm information. The application provides two indirect tire pressure monitoring modes, including radius method and spectrum method, wherein the radius method is that all the other tire pressure states are analyzed according to at least one normal tire pressure of vehicle, consequently when target vehicle appears each tire and is the extreme condition of unusual tire pressure, then need to be changed into the spectrum method and carry out the analysis of tire pressure state.
In some embodiments, when the initial warning information indicates that the target vehicle has at least one tire having a normal tire pressure state, the tire pressure state of each tire is analyzed using a radius method.
Specifically, pulse values of respective tires of the target vehicle, that is, the number of teeth passed by the wheel speed sensor per unit time, are collected by the wheel speed sensor.
Further, since the rolling distance S of the tire cannot be read in the automobile anti-lock braking system, the rolling distance S of the tire is determined using the pulse value, wherein the rolling distance S of each tire is assumed to be the same after the target vehicle travels a distance. First, due to the rolling radius r of the tire i Can be expressed as:
in the formula (1), n i The number of turns of each tire is shown, i represents the serial number of the tire, and the value of i is a non-zero natural number.
Wherein the number of turns n of each tire i Can be expressed as:
in the formula (2), M i Represents the pulse collection value of each tire, N represents the number of teeth of each wheel speed sensor, since M i And N is a known quantity, then N i Are known.
Further, substituting equation (2) into equation (1) obtains the rolling distance of the tire:
further, a value M is collected from the pulse of each tire i . The mean pulse value can be expressed as:
in the formula (4), k i Represents the pulse correction coefficient, and L represents the total number of tires, wherein i is less than or equal to L.
Further, according to the pulse mean value, the pulse correction coefficient can be obtained: k is a radical of i ＝∑M i /(LM i )。
Furthermore, the pulse correction coefficient is used to acquire the pulse acquisition value M i And correcting to obtain the standard pulse value of each tire: m is ＝k i ×M i 。
Further advance toStep by step, pulse standard value M for each tire is Carrying out averaging processing to obtain a pulse standard mean value
Further, the pulse standard value M of each tire is set is And pulse standard mean
And comparing to determine the actual error between the pulse standard value and the pulse standard mean value of each tire:
wherein the actual error value e i Characterizing the degree of deviation of the pulse standard value of the tire from the pulse standard mean value when e i When the error is larger than the preset error threshold value, the tire is determined to be in an abnormal tire pressure state, and when the error is larger than the preset error threshold value, the tire is determined to be in an abnormal tire pressure state i And when the tire pressure is less than or equal to the preset error threshold value, the tire is determined to be in a normal tire pressure state.
Of course, the pulse standard value of each tire can be compared with the predetermined calibration value M i0 The comparison is made, i.e. the actual error can also be expressed as:
in some embodiments, if the target vehicle has both the tire in the abnormal tire pressure state and the tire in the normal tire pressure state after the radius method monitoring for the preset turn, the initial warning message is directly updated to the target warning message, wherein the target warning message is a warning signal containing the current actual tire pressure state of the target vehicle. And if all the tires of the target vehicle are in an abnormal tire pressure state or in a normal tire pressure state, namely the actual tire pressure states of all the tires are the same, skipping to a frequency spectrum method for monitoring.
In some embodiments, after the initial alarm information shows that all tires of the target vehicle are in abnormal tire pressure state, or after the initial alarm information shows that the actual tire pressure states of all the tires of the target vehicle are the same after the initial alarm information is monitored by the radius method, the monitoring is carried out by using a frequency spectrum method.
Specifically, when no normal tire is present in the target vehicle, the pulse values of the respective tires are collected by the wheel speed sensors. Further, based on the pulse values, wheel speed values for the respective tires are determined.
Specifically, the pulse value is processed by using a least square method to eliminate the error of the wheel speed sensor, and an accurate wheel speed value is obtained. Firstly, constructing an observation function according to a few wheel speed values and corresponding pulse values of each tire; further, taking a relation curve of theoretically characterizing the wheel speed value and the corresponding pulse value as a theoretical function; based on the above, there is a certain error between the observation function and the theoretical function, and the least square method determines the objective function by minimizing the sum of squares of the errors. Finally, an accurate wheel speed value, i.e., a wheel speed target value, of each tire is calculated through the objective function.
More specifically, let the observation function be expressed as:
h θ (x)＝θ 0 +θ 1 x+θ 2 x 2 +θ 3 x 3 +…+θ d x d ，
wherein d represents h θ (x) Number of terms of, theta d Parameters representing an observation function.
Let the theoretical function be y (x), when the pulse value is x u The observation function can be expressed as h θ (x u ) Then the theoretical function can be expressed as y (x) u ). Further, the objective of the least squares method is to find a set of parameters θ d So that the sum of squares of the errors
Has a minimum value, i.e. H min In which H is min Is an objective function. When the pulse value is collected, the pulse value is passed through H min A wheel speed target value may be obtained.
Further, a wheel speed curve for characterizing the wheel speed target value versus time is plotted using the plurality of collected wheel speed target values. Further, a plurality of wheel speed target values are selected in the wheel speed curve using interpolation.
Specifically, assume that the number of teeth of the wheel speed sensor is N and the number of tire revolutions is K. At this time, the average time of each tooth passing by each tire per rotation is
To eliminate the abrupt change between the above means, the average time of each turn passing each tooth is modified to
In some embodiments, the average time for each tooth to pass for each revolution of the tire after correction is:
wherein P represents a number increasing in the order of 1 to K-1, and j represents a number increasing in the order of 1 to KN.
In some embodiments, the single-turn error for each tooth of the wheel speed sensor is:
further, the mean error value of each tooth of the wheel speed sensor in K circles is:
further, the radian of the gear ring of the wheel speed sensor after the error is eliminated is as follows:
further, a further wheel speed target value is selected from the wheel speed curve, and the wheel speed target value can be expressed as:
wherein R represents the radius of the wheel corresponding to the tire, N is the number of teeth of the wheel speed sensor, f Wheel Is the sampling frequency of the target value of the wheel speed,
constant for a certain system, e.g. λ 0.7, so that when the pulse value is x u And the wheel speed is as follows:
v u ＝λf u wheel ＝λφ j /(t j 2 pi), wherein f U wheel ＝φ j /(t j *2π)*N。
In some embodiments, the wheel speed target is resampled and the wheel speed signals are homogenized at 0.5ms intervals. For example, a rectangular coordinate system has an abscissa t a-1 Ordinate is v a-1 Point Q of a-1 And the abscissa is
Ordinate is v j-1 Point Q of j-1 And the abscissa is
Ordinate v j Point Q of j When point Q is reached j And point Q j-1 The time interval between exceeds 0.5ms, the point Q can be set j And point Q j-1 The speed corresponding to the abscissa 0.0005 × j is calculated as a linear relation, namely the wheel speed target value after resampling:
furthermore, the resampled wheel speed target value is converted from a time domain to a frequency domain by fourier transform, so that the frequency corresponding to the wheel speed target value can be obtained to prepare for the estimation of the resonance frequency.
Specifically, the theoretical resonance frequency of the tire is estimated by using an estimation method in combination with the frequency corresponding to each wheel speed target value, and a preset frequency range is set with the theoretical resonance frequency as the center. And determining whether the frequency corresponding to the target wheel speed value is in a preset frequency range or not in the frequency domain range, wherein if the frequency corresponding to the target wheel speed value is in the preset frequency range, the actual tire pressure state of the tire is a normal tire pressure state, and if the frequency corresponding to the target wheel speed value exceeds the preset frequency range, the actual tire pressure state of the tire is an abnormal normal tire pressure state. For example, when the target vehicle has two front wheels and two rear wheels, if the resonance frequency of the tire of the front wheel is analyzed, the maximum amplitude a is found in the frequency range of 35Hz to 45Hz, the frequencies f1 and f2 corresponding to the amplitude of 0.8A are found from the maximum amplitude to both sides, and the average value (f1+ f2)/2 of f1 and f2 is taken as the theoretical resonance frequency of the tire of the front wheel; when the resonance frequency of the tire of the front wheel is analyzed, the maximum amplitude value B is found within 42Hz to 50Hz, the frequencies f3 and f4 corresponding to the amplitude of 0.8B are found towards both sides by taking the maximum amplitude as the center, and the average value (f3+ f4)/2 of f3 and f4 is taken as the theoretical resonance frequency of the tire of the rear wheel.
In some embodiments, the initial warning message is updated to a disarm if there are no tires of an abnormal tire pressure condition in the target vehicle during the monitoring by the spectral method for a preset round. And if the target vehicle has the tire with the abnormal tire pressure state, directly updating the initial alarm message into a target alarm message, wherein the target alarm message is an alarm signal containing the current actual tire pressure state of the target vehicle.
According to the tire pressure monitoring method, after the initial alarm information is sent out, the adaptive monitoring mode is selected according to the number of the tires in the normal tire pressure state to continuously monitor the tire pressure state of the target vehicle, and when the tires in the abnormal tire pressure state do not exist in the subsequent monitoring process, the initial alarm information is automatically removed, so that the effects of relieving the user panic and improving the driving experience are achieved.
Fig. 2 is a block diagram of a tire pressure monitoring system according to another aspect of the present application.
As shown in fig. 2, the present application also proposes a tire pressure monitoring system, which may include: an acquisition module 210, an analysis module 220, and an update module 230. The collecting module 210 is configured to collect pulse values of a plurality of tires of the target vehicle, respectively, and obtain a plurality of pulse collection values. The analysis module 220 is configured to analyze the pulse acquisition values respectively to obtain actual tire pressure states of the tires. The updating module 230 is configured to update the initial alarm information according to the actual tire pressure status.
In some embodiments, further comprising: and an initial alarm information analysis module (not shown) for acquiring the number of tires having a normal tire pressure state in the target vehicle according to the initial tire pressure alarm information.
In some embodiments, the performing step of the analysis module 220 may include:
when at least one normal tire exists in the target vehicle, acquiring pulse values of the tires by a wheel speed sensor; calculating a pulse correction coefficient of each tire according to each pulse value; determining a pulse standard value of each tire based on the pulse correction coefficient; carrying out averaging processing on each pulse standard value to obtain a pulse standard average value; determining an actual error value between the pulse standard value and the pulse standard mean value of each tire by using an error formula; and comparing the actual error value with a predetermined error threshold value to determine an actual tire pressure state of the tire, wherein the actual tire pressure state comprises a normal tire pressure state and an abnormal tire pressure state.
In some embodiments, the error formula is:
wherein M is is A pulse standard value of each tire is represented,
is the standard mean of the pulses.
In some embodiments, a result determination module (not shown) is used to obtain the number of tires in the target vehicle that have a normal tire pressure state.
In some embodiments, the performing step of the analysis module 220 may further include: when no normal tire exists in the target vehicle, acquiring a plurality of pulse values of each tire by a wheel speed sensor; processing the plurality of pulse values by using a least square method to obtain a plurality of wheel speed target values; drawing a wheel speed curve of the target vehicle based on the plurality of wheel speed target values, wherein the wheel speed curve is used for representing the relationship between the wheel speed target values of the target vehicle and time; collecting a plurality of wheel speed target values in a wheel speed curve by using an interpolation method; converting the wheel speed target value from a time domain to a frequency domain by utilizing Fourier transform; acquiring the frequency corresponding to the wheel speed target value, and determining the preset frequency range of the wheel speed target value; and comparing the frequency corresponding to the wheel speed target value with a preset frequency range to determine the actual tire pressure state of the tire, wherein the actual tire pressure state comprises a normal tire pressure state and an abnormal tire pressure state.
In some embodiments, the execution of the update module 230 may include: and updating the initial alarm information to alarm release when the actual tire pressure states of the plurality of tires of the target vehicle do not have abnormal tire pressure states.
According to the tire pressure monitoring system, after initial alarm information is sent out, the adaptive monitoring mode is selected according to the number of the tires in the normal tire pressure state to continuously monitor the tire pressure state of a target vehicle, when the tires in the abnormal tire pressure state do not exist in the follow-up monitoring process, the initial alarm information is automatically removed, the panic of a user is relieved, and the driving experience is improved.
Fig. 3 is a schematic diagram of an electronic device according to yet another aspect of the present application. As shown in fig. 3, according to still another aspect of the present application, there is also provided an electronic device. The electronic device may include one or more processors and one or more memories. Wherein the memory has stored therein computer readable code which, when executed by the one or more processors, may perform the tire pressure monitoring method as described above.
The method or system according to embodiments of the present application may also be implemented by means of the architecture of the electronic device shown in fig. 3. As shown in fig. 3, the electronic device may include a bus 301, one or more CPUs 302, a Read Only Memory (ROM)303, a Random Access Memory (RAM)304, a communication port 305 connected to a network, an input/output component 306, a hard disk 307, and the like. A storage device in the electronic device, such as the ROM303 or the hard disk 307, may store the tire pressure monitoring method provided herein. The tire pressure monitoring method includes, for example, acquiring pulse values of a plurality of tires of a target vehicle, respectively, obtaining a plurality of pulse acquisition values; analyzing the pulse acquisition values respectively to obtain the actual tire pressure state of each tire; and updating the initial alarm information according to the actual tire pressure state. Further, the electronic device may also include a user interface 308. Of course, the architecture shown in FIG. 3 is merely exemplary, and one or more components of the electronic device shown in FIG. 3 may be omitted when implementing different devices, as desired
FIG. 4 is a schematic diagram of a computer-readable storage medium structure according to yet another aspect of the present application. As shown in fig. 4, a computer-readable storage medium 400 according to an embodiment of the present application. The computer-readable storage medium 400 has computer-readable instructions stored thereon. The tire pressure monitoring method according to the embodiments of the present application described with reference to the above drawings may be performed when the computer readable instructions are executed by a processor. The storage medium 400 includes, but is not limited to, volatile memory and/or non-volatile memory, for example. Volatile memory can include, for example, Random Access Memory (RAM), cache memory (or the like). The non-volatile memory may include, for example, Read Only Memory (ROM), a hard disk, flash memory, and the like.
Further, according to an embodiment of the present application, the processes described above with reference to the flowcharts may be implemented as a computer software program. For example, the present application provides a non-transitory machine-readable storage medium having stored thereon machine-readable instructions executable by a processor to perform instructions corresponding to the method steps provided herein, such as: respectively acquiring pulse values of a plurality of tires of a target vehicle to obtain a plurality of pulse acquisition values; analyzing the pulse acquisition values respectively to obtain the actual tire pressure state of each tire; and updating the initial alarm information according to the actual tire pressure state. The computer program, when executed by a Central Processing Unit (CPU), performs the above-described functions defined in the method of the present application.
The method and apparatus, device of the present application may be implemented in a number of ways. For example, the methods and apparatuses, devices of the present application may be implemented by software, hardware, firmware, or any combination of software, hardware, firmware. The above-described order for the steps of the method is for illustration only, and the steps of the method of the present application are not limited to the order specifically described above unless specifically stated otherwise. Further, in some embodiments, the present application may also be embodied as a program recorded in a recording medium, the program including machine-readable instructions for implementing a method according to the present application. Thus, the present application also covers a recording medium storing a program for executing the method according to the present application.
In addition, parts of the above technical solutions provided in the embodiments of the present application that are consistent with the implementation principle of the corresponding technical solutions in the prior art are not described in detail, so as to avoid redundant description.
The above description is only an embodiment of the present application and an illustration of the technical principles applied. It will be appreciated by a person skilled in the art that the scope of protection covered by the present application is not limited to the embodiments with a specific combination of the features described above, but also covers other embodiments with any combination of the features described above or their equivalents without departing from the technical idea. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (10)
1. A tire pressure monitoring method, characterized by comprising:
respectively acquiring pulse values of a plurality of tires of a target vehicle to obtain a plurality of pulse acquisition values;
analyzing the pulse acquisition values respectively to obtain the actual tire pressure state of each tire; and
and updating the initial alarm information according to the actual tire pressure state.
2. The tire pressure monitoring method according to claim 1, before acquiring the pulse values of the plurality of tires of the target vehicle, respectively, and obtaining the plurality of pulse acquisition values, comprising:
and acquiring the number of tires with normal tire pressure states in the target vehicle according to the initial tire pressure alarm information.
3. The tire pressure monitoring method according to claim 2, wherein the analyzing the plurality of pulse acquisition values respectively to obtain the actual tire pressure state of each tire comprises:
when at least one normal tire exists in the target vehicle, acquiring pulse values of the tires by a wheel speed sensor;
calculating a pulse correction coefficient for each of the tires based on each of the pulse values;
determining a pulse standard value of each tire based on the pulse correction coefficient;
averaging the pulse standard values to obtain a pulse standard average value;
determining an actual error value between the pulse standard value and the pulse standard mean value of each tire by using an error formula; and
and comparing the actual error value with a preset error threshold value, and determining the actual tire pressure state of the tire, wherein the actual tire pressure state comprises a normal tire pressure state and an abnormal tire pressure state.
4. The tire pressure monitoring method according to claim 3, wherein the error formula is:
wherein M is is A pulse standard value of each tire is represented,
is the standard mean of the pulses.
5. The tire pressure monitoring method according to claim 3, wherein after said comparing the actual error value with a predetermined error threshold value to determine the actual tire pressure state of the tire, comprising:
acquiring the number of tires with normal tire pressure state in the target vehicle.
6. The tire pressure monitoring method according to claim 2 or 5, wherein the analyzing the plurality of pulse acquisition values respectively to obtain the actual tire pressure state of each tire comprises:
collecting a plurality of pulse values of each tire by a wheel speed sensor;
processing the pulse values by using a least square method to obtain a plurality of wheel speed target values;
drawing a wheel speed curve of the target vehicle based on a plurality of the wheel speed target values, wherein the wheel speed curve is used for representing the relationship between the wheel speed target values of the target vehicle and time;
collecting a plurality of wheel speed target values in the wheel speed curve by using an interpolation method;
converting the wheel speed target value from a time domain to a frequency domain by utilizing Fourier transform;
acquiring the frequency corresponding to the wheel speed target value, and determining a preset frequency range of the wheel speed target value; and
and comparing the frequency corresponding to the wheel speed target value with a preset frequency range, and determining the actual tire pressure state of the tire, wherein the actual tire pressure state comprises a normal tire pressure state and an abnormal tire pressure state.
7. The tire pressure monitoring method according to any one of claims 6, wherein the updating of initial alarm information according to the actual tire pressure state includes:
and updating the initial alarm information to alarm release when the actual tire pressure states of the plurality of tires of the target vehicle do not have abnormal tire pressure states.
8. A tire pressure monitoring system, comprising:
the acquisition module is used for respectively acquiring pulse values of a plurality of tires of a target vehicle to obtain a plurality of pulse acquisition values;
the analysis module is used for analyzing the pulse acquisition values respectively to obtain the actual tire pressure state of each tire; and
and the updating module is used for updating the initial alarm information according to the actual tire pressure state.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor executing the program to implement the tire pressure monitoring method according to any one of claims 1 to 7.
10. A computer-readable storage medium on which a computer program is stored, which program, when executed by a processor, is adapted to carry out the tire air pressure monitoring method according to any one of claims 1 to 7.
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