CN105437880A - Tire pressure monitoring system and method - Google Patents
Tire pressure monitoring system and method Download PDFInfo
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- CN105437880A CN105437880A CN201510988214.9A CN201510988214A CN105437880A CN 105437880 A CN105437880 A CN 105437880A CN 201510988214 A CN201510988214 A CN 201510988214A CN 105437880 A CN105437880 A CN 105437880A
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- wheel speed
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- oscillation frequency
- frequency signal
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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
- B60C23/001—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving
- B60C23/002—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving by monitoring conditions other than tyre pressure or deformation
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- Measuring Fluid Pressure (AREA)
Abstract
The invention provides a tire pressure monitoring system. The tire pressure monitoring system comprises a display alarming unit, vibration sensors, wheel speed sensors and a central processing unit, wherein the vibration sensors and the wheel speed sensors are connected to wheels; the central processing unit is used for storing stable vibration frequency signals of all the wheels under various conditions when the car moves and taking the stable vibration frequency signals as a rule base of vibration frequency data of the car; the central processing unit is used for taking vibration frequency signals and wheel speed signals, which are measured in real time, as input variables and inputting the input variables into a fuzzy controller to be calculated to obtain a difference value of stable-state data in a real-time vibration frequency signal and wheel speed signal rule base; and when the difference values of the vibration frequency signals and the wheel speed signals are more than a pre-set threshold value, the central processing unit transmits an alarming signal to the display alarming unit. The tire pressure monitoring system provided by the invention can be used for monitoring a tire pressure state through the measured vibration frequency signals and wheel speed signals of all the wheels; and the vibration frequency signals and the wheel speed signals are monitored at the same time and the judgment accuracy is high.
Description
Technical field
The present invention relates to automotive safety monitoring field, particularly a kind of abnormal tyre pressure monitoring system and method.
Background technology
At present, tire pressure monitoring system mainly adopts direct tire pressure monitoring system, direct-type TMPS measures tire pressure to be needed to install extra tire inner sensor, cost is higher, simultaneously directly metering system adopts transmission over radio, by weather and environmental concerns large, service life is by the restriction of battery life, major part vehicle, because limiting by reasons such as costs, have impact on using and promoting of system for detecting tire pressure.
Application number is that the patent of CN201320317512.1 provides a kind of device for monitoring tyre pressure, described device for monitoring tyre pressure comprises the pressure sensor of the detection pressure of tire be arranged on tire and/or detects the temperature sensor of tyre temperature, it is characterized in that, described device for monitoring tyre pressure also comprises:
Tire information treater, described tire information treater is arranged in described tire, for storing the identification information of tire, and sends the identification information of described tire;
Tire pressure monitor, on the wheel hub that described tire pressure monitor is arranged at described tire or tire tube valve, for receiving tire pressure and/or the tyre temperature of the described tire of described pressure sensor and/or temperature sensor transmission, receive the identification information of the described tire that described tire information treater sends, the identification information packing of described tire pressure and/or tyre temperature and described tire is sent.
Summary of the invention
The invention provides a kind of tire pressure monitoring system, it comprises display alarm unit, is connected to the vibration sensor on each wheel, wheel speed sensors, central process unit;
Described vibration sensor is for detecting the oscillation frequency signal of wheel, and described wheel speed sensors is for detecting wheel speed signal, and the oscillation frequency signal of detection, wheel speed signal are sent to described central process unit by described vibration sensor, wheel speed sensors; Stable oscillation frequency signal is respectively taken turns, as the rule base of the oscillation frequency data of vehicle when described central process unit preserves vehicle operating in various situation;
The oscillation frequency signal recorded in real time and wheel speed signal are inputed to a fuzzy controller as input variable and carry out computing by described central process unit, obtain real-time oscillation frequency signal and the wheel speed signal difference value with the stabilized conditions data in rule base, when the difference value of the oscillation frequency signal that described fuzzy controller exports and wheel speed signal all exceed set threshold values time, central process unit sends an alerting signal to described display alarm unit.
Preferably, described central process unit carries out filtering to the oscillation frequency signal received, the tire vibration frequency interference that the non-abnormal tyre pressure of filtering causes.
Preferably, described tire vibration frequency interference comprises the humorous wave excitation of the frequency signal generation of clashing into vibration noise.
Preferably, described each wheel speed sensors is installed on four wheel shafts of vehicle respectively, and in the process of moving, wheel produces inductive impulse signal to vehicle in rotation process.
Preferably, described vibration sensor is installed on four wheel spindle noses of vehicle respectively.
Present invention also offers a kind of tire pressure monitoring method, it comprises the following steps:
Detect oscillation frequency signal and the wheel speed signal of each wheel of vehicle, when preserving vehicle operating in a period of time, respectively take turns stable oscillation frequency signal, as the rule base of operating data;
To real-time reception to oscillation frequency signal carry out filtering, the tire vibration frequency interference that the non-abnormal tyre pressure of filtering causes, and the oscillation frequency signal detected in real time and wheel speed signal are inputed to a fuzzy controller as input variable carry out computing, obtain real-time oscillation frequency signal and the oscillation frequency signal of wheel speed signal with stabilized conditions in described rule base and the difference value of wheel speed signal;
When the difference value of the oscillation frequency signal that described fuzzy controller exports and wheel speed signal all exceed set threshold values time, send alarm command signal.
The present invention has following beneficial effect:
Tire pressure monitoring system provided by the invention is by recording oscillation frequency signal and the wheel speed signal of each wheel, and monitor tire pressure state, without the need to installing extra tire inner sensor, cost is low; Monitor tire pressure by being combined with wheel speed signal by oscillation frequency signal, avoid the error being used alone a signal and carrying out judging to occur, judging nicety rate is high simultaneously; Simultaneously the present invention is by inputting fuzzy controller, strong robustness by vibration signal and wheel speed signal, and the problem such as to become, delayed when solving non-linear, the close coupling of frequency signal and wheel speed signal, stability is strong.
Certainly, implement arbitrary product of the present invention might not need to reach above-described all advantages simultaneously.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, be briefly described describing the required accompanying drawing used to embodiment below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The tire pressure monitoring system structure composition schematic diagram that Fig. 1 provides for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiments provide a kind of tire pressure monitoring system, as shown in Figure 1, it comprises display alarm unit 2, is connected to the vibration sensor on each wheel, wheel speed sensors, central process unit 1;
Described vibration sensor is for detecting the oscillation frequency signal of wheel, and described wheel speed sensors is for detecting wheel speed signal, and the oscillation frequency signal of detection, wheel speed signal are sent to central process unit 1 by described vibration sensor, wheel speed sensors; Stable oscillation frequency signal is respectively taken turns, as the rule base of the oscillation frequency data of vehicle when central process unit 1 preserves vehicle operating in various situation; In the present embodiment, various situation comprises different loads, the different speed of a motor vehicle, different road conditions, stable oscillation frequency signal is respectively taken turns when central process unit 1 preserves vehicle operating in above-mentioned situation, here load, the speed of a motor vehicle carry out repeatedly value with certain difference respectively in certain interval, road conditions comprise different types of paved road situation, oscillation frequency data under various state, by completing the oscillation frequency Data Detection of vehicle under different load, the speed of a motor vehicle and road conditions, are preserved as rule base by the present embodiment respectively.
The oscillation frequency signal recorded in real time and wheel speed signal are inputed to a fuzzy controller as input variable and carry out computing by central process unit 1, obtain real-time oscillation frequency signal and the wheel speed signal difference value with the stabilized conditions data in rule base, when the difference value of the oscillation frequency signal that described fuzzy controller exports and wheel speed signal all exceed set threshold values time, central process unit 1 sends an alerting signal to display alarm unit 2.
When tire pressure signal occurs abnormal, oscillation frequency signal and wheel speed signal can be caused to occur larger change, the present embodiment is provided with the threshold values of a fluctuation range, when difference value between the standard value in the oscillation frequency signal that fuzzy controller exports and wheel speed signal and rule base exceedes threshold values, then central process unit 1 judges that tire pressure occurs extremely.General less difference may cause due to the external conditions such as temperature, road conditions, judges so need to arrange a rational threshold values.
In the present embodiment, vibration sensor comprises the near front wheel vibration sensor 3, off front wheel vibration sensor 7, left rear wheel vibration sensor 5, off hind wheel vibration sensor 9, the near front wheel vibration sensor 3, off front wheel vibration sensor 7, left rear wheel vibration sensor 5, off hind wheel vibration sensor 9 is installed on four wheel spindle noses of vehicle respectively, for responding to the vibration of wheel and tire, be installed on vibration sensor on wheel spindle nose for gathering the vibration signal of each tire, by the vibration passing between tire to axletree to vibration sensor, and be converted into electric signal, be sent to central process unit 1, the vibration of tire includes the air vibration in carcass and tire, its direction of vibration of different tires and frequency all variant, simultaneously relevant with condition of road surface and vehicle load state, be embodied in the vibration natural frequency produced when axletree and access area run, when tire internal air pressure changes, also corresponding change can be there is in the natural frequency of its vibration, along with the rising of air pressure, its Oscillation Amplitude is constant, the natural frequency of tire also increases.The vibration of tire stiffness on automobile has larger impact, affect tire stiffness because have material, structure, air pressure etc., the rigidity of tire raises with air pressure and increases, the increase of inflation pressure makes the interior internal stress be subject to of taking turns increase accordingly, and therefore the rigidity of tire is also in increase, and the natural frequency of tire also changes thereupon.
When vehicle in the process of moving, the vibration natural frequency produced when can run in axletree and access area, this oscillation frequency and tire stiffness, tyre type, condition of road surface are relevant.With tire stiffness because have material, structure, the factors such as air pressure, when tire internal air pressure changes, also can there is respective change in its rigidity, lead
Also can there is corresponding change in the natural frequency causing tire vibration, along with the rising of air pressure, the natural frequency of tire also increases, and vehicle produces a fixing vibration due to the change of tire pressure and the natural frequency of tire in the process of moving, and its oscillation frequency is
f in formula
afor Suspension Deformation,
wherein G is suspension load, and C is suspension rate, and suspension rate is made up of following formula,
C
sfor spring stiffness, C
tfor loading of tire, due to automobile in the process of moving, its load is constant, when air pressure changes, change the rigidity of tire, the composite rigidity of suspension changes, the oscillation frequency of automobile axle is changed, this vibration that changes of the output signal frequency of vibration sensor is passed on tire spindle nose, is installed in the vibration sensor collection on wheel spindle nose, becomes electric signal and be sent to central processor unit.
In the present embodiment, wheel speed sensors comprises the near front wheel wheel speed sensors 4, off front wheel wheel speed sensors 7, left rear wheel wheel speed sensors 6, off hind wheel wheel speed sensors 10 are installed on four wheel shafts of vehicle respectively, for responding to the rotating speed of wheel, or share one group of wheel speed signal with abs sensor, when vehicle in the process of moving, due to the rotation of wheel, produce inductive impulse signal, and be fed to central process unit 1.Central process unit 1 gathers the signal that each road inputs, and calculates current vehicle speed signal.When the air pressure of tire changes, also corresponding change can be there is in the effective rolling radius of tire, the cireular frequency of tire is also corresponding simultaneously changes, in the driving process of vehicle, the natural frequency that one take tire rolling radius as resonance cycle can be produced, when the air pressure of tire changes, the natural frequency superposed in the wheel speed signal that car speed sensor collects also can change, and is gathered by central process unit.
In the present embodiment, central process unit 1 carries out filtering to the oscillation frequency signal received, the tire vibration frequency interference that the non-abnormal tyre pressure of filtering causes; Described tire vibration frequency interference comprises the humorous wave excitation of the frequency signal generation of clashing into vibration noise.What vibration sensor passed to central process unit is a rumble spectrum signal changed, due to the polytropy of road surface evenness situation and vehicle running state, a lot of frequency signal clashing into vibration noise is included in this signal, appreciiable humorous wave excitation can be there is in the rumble spectrum without error handling, very difficult resonance frequency of offering an explanation out reality, on the other hand, due to the tire vibration that Uneven road causes, understand with a special frequency fluctuation, vibration sensor is caused to fluctuate on the same frequencies, form sampling error, the oscillation frequency signal of central process unit to sampling is needed to carry out reheat treatment, good improvement is obtained by the correction rumble spectrum after filtering process, comparatively clearly can react the frequency limit of vibration.
Tire pressure monitoring system provided by the invention is by recording oscillation frequency signal and the wheel speed signal of each wheel, and monitor tire pressure state, without the need to installing extra tire inner sensor, cost is low; Monitor tire pressure by being combined with wheel speed signal by oscillation frequency signal, avoid the error being used alone a signal and carrying out judging to occur, judging nicety rate is high simultaneously; Simultaneously the present invention is by inputting fuzzy controller, strong robustness by vibration signal and wheel speed signal, and the problem such as to become, delayed when solving non-linear, the close coupling of frequency signal and wheel speed signal, stability is strong.
The disclosed preferred embodiment of the present invention just sets forth the present invention for helping above.Preferred embodiment does not have all details of detailed descriptionthe, does not limit the detailed description of the invention that this invention is only described yet.Obviously, according to the content of this specification sheets, can make many modifications and variations.This specification sheets is chosen and is specifically described these embodiments, is to explain principle of the present invention and practical application better, thus makes art technical personnel understand well and to utilize the present invention.The present invention is only subject to the restriction of claims and four corner and equivalent.
Claims (6)
1. a tire pressure monitoring system, is characterized in that, comprises display alarm unit, is connected to the vibration sensor on each wheel, wheel speed sensors, central process unit;
Described vibration sensor is for detecting the oscillation frequency signal of wheel, and described wheel speed sensors is for detecting wheel speed signal, and the oscillation frequency signal of detection, wheel speed signal are sent to described central process unit by described vibration sensor, wheel speed sensors; Stable oscillation frequency signal is respectively taken turns, as the rule base of the oscillation frequency data of vehicle when described central process unit preserves vehicle operating in various situation;
The oscillation frequency signal recorded in real time and wheel speed signal are inputed to a fuzzy controller as input variable and carry out computing by described central process unit, obtain real-time oscillation frequency signal and the wheel speed signal difference value with the stabilized conditions data in rule base, when the difference value of the oscillation frequency signal that described fuzzy controller exports and wheel speed signal all exceed set threshold values time, central process unit sends an alerting signal to described display alarm unit.
2. tire pressure monitoring system as claimed in claim 1, it is characterized in that, described central process unit carries out filtering to the oscillation frequency signal received, the tire vibration frequency interference that the non-abnormal tyre pressure of filtering causes.
3. tire pressure monitoring system as claimed in claim 2, is characterized in that, described tire vibration frequency interference comprises the humorous wave excitation of the frequency signal generation of clashing into vibration noise.
4. tire pressure monitoring system as claimed in claim 1, it is characterized in that, described each wheel speed sensors is installed on four wheel shafts of vehicle respectively, and in the process of moving, wheel produces inductive impulse signal to vehicle in rotation process.
5. tire pressure monitoring system as claimed in claim 1, it is characterized in that, described vibration sensor is installed on four wheel spindle noses of vehicle respectively.
6. a tire pressure monitoring method, is characterized in that, comprises the following steps:
Detect oscillation frequency signal and the wheel speed signal of each wheel of vehicle, when preserving vehicle operating in a period of time, respectively take turns stable oscillation frequency signal, as the rule base of operating data;
To real-time reception to oscillation frequency signal carry out filtering, the tire vibration frequency interference that the non-abnormal tyre pressure of filtering causes, and the oscillation frequency signal detected in real time and wheel speed signal are inputed to a fuzzy controller as input variable carry out computing, obtain real-time oscillation frequency signal and the oscillation frequency signal of wheel speed signal with stabilized conditions in described rule base and the difference value of wheel speed signal;
When the difference value of the oscillation frequency signal that described fuzzy controller exports and wheel speed signal all exceed set threshold values time, send alarm command signal.
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| CN201510988214.9A CN105437880B (en) | 2015-12-23 | 2015-12-23 | A kind of tire pressure monitoring system and method |
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| CN201510988214.9A CN105437880B (en) | 2015-12-23 | 2015-12-23 | A kind of tire pressure monitoring system and method |
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| CN105437880B CN105437880B (en) | 2018-07-31 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106114080A (en) * | 2016-07-29 | 2016-11-16 | 清华大学苏州汽车研究院（吴江） | Tire pressure monitoring early warning system based on the absolute relative method of wheel pulse number and method |
| CN106840521A (en) * | 2017-04-07 | 2017-06-13 | 深圳市安驾创新科技有限公司 | A kind of tire dynamic and balance monitoring system and its monitoring method |
| TWI593571B (en) * | 2016-05-06 | 2017-08-01 | Mobiletron Electronics Co Ltd | Tire monitoring methods |
| CN107175996A (en) * | 2016-03-11 | 2017-09-19 | 株式会社万都 | Tire pressure estimates equipment and its tire pressure method of estimation |
| CN107399207A (en) * | 2016-05-18 | 2017-11-28 | 车王电子股份有限公司 | Tire monitoring method |
| CN107512143A (en) * | 2017-07-14 | 2017-12-26 | 清华大学 | Tire pressure calculates method, apparatus and the application on bicycle |
| CN108099514A (en) * | 2016-11-24 | 2018-06-01 | 现代自动车株式会社 | Vehicle and method for controlling a vehicle |
| CN111231588A (en) * | 2020-01-17 | 2020-06-05 | 新石器慧通（北京）科技有限公司 | Tire pressure monitoring method and device, vehicle-mounted equipment and storage medium |
| CN111469610A (en) * | 2020-05-28 | 2020-07-31 | 丹阳市车船装饰件有限公司 | Method for monitoring tire pressure in real time by tire pressure monitoring system |
| CN112750227A (en) * | 2021-01-11 | 2021-05-04 | 大连海威特机械有限公司 | Mining truck driving dynamic load monitoring system |
| CN116804598A (en) * | 2023-06-27 | 2023-09-26 | 襄阳达安汽车检测中心有限公司 | Harmonic vibration identification method and system for passenger car tire |
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| CN106840521A (en) * | 2017-04-07 | 2017-06-13 | 深圳市安驾创新科技有限公司 | A kind of tire dynamic and balance monitoring system and its monitoring method |
| CN107512143A (en) * | 2017-07-14 | 2017-12-26 | 清华大学 | Tire pressure calculates method, apparatus and the application on bicycle |
| CN111231588A (en) * | 2020-01-17 | 2020-06-05 | 新石器慧通（北京）科技有限公司 | Tire pressure monitoring method and device, vehicle-mounted equipment and storage medium |
| CN111469610A (en) * | 2020-05-28 | 2020-07-31 | 丹阳市车船装饰件有限公司 | Method for monitoring tire pressure in real time by tire pressure monitoring system |
| CN112750227A (en) * | 2021-01-11 | 2021-05-04 | 大连海威特机械有限公司 | Mining truck driving dynamic load monitoring system |
| CN116804598A (en) * | 2023-06-27 | 2023-09-26 | 襄阳达安汽车检测中心有限公司 | Harmonic vibration identification method and system for passenger car tire |
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