CN106143003B - The tire pressure monitoring system and its implementation of automatic adjustment - Google Patents
The tire pressure monitoring system and its implementation of automatic adjustment Download PDFInfo
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- CN106143003B CN106143003B CN201510181469.4A CN201510181469A CN106143003B CN 106143003 B CN106143003 B CN 106143003B CN 201510181469 A CN201510181469 A CN 201510181469A CN 106143003 B CN106143003 B CN 106143003B
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Abstract
This application discloses a kind of tire pressure monitoring systems of automatic adjustment, including：--- multiple pressure sensors, air pressure for measuring each tire of vehicle are simultaneously uploaded to controller；--- multiple speed probes, rotating speed for measuring each tire of vehicle are simultaneously uploaded to controller；--- controller receives each tire pressure, each tire rotational speed, speed, calculates the angle for needing to correct, and the steering for controlling vehicle carries out angle correction.The application can automatically be corrected when coaxial tire pressure difference is normal by steering, and vehicle is made to be maintained at scheduled track in the process of moving, ensure traffic safety.
Description
Technical field
This application involves a kind of TPMS of vehicle (tire pressure monitoring system, tire pressure monitoring systems
System).
Background technology
TPMS sends out alarm signal for monitoring each tire pressure of vehicle in real time in arbitrary abnormality in tire air-pressure.Root
According to realization principle difference, TPMS point for direct-type (direct TPMS, be abbreviated as dTPMS) and indirect type (indirect TPMS,
It is abbreviated as iTPMS) two classes.DTPMS is that multiple pressure sensors are separately mounted to each inside tires or outside, each pressure
Sensor is used to measure and report the air pressure of a tire, each tire pressure to be obtained by receiver and judge whether there is tire pressure
It is abnormal.ITPMS simultaneously directly measures each tire pressure without using pressure sensor, but other signals is used to infer wheel nausea
Pressure.For example, iTPMS detects each vehicle wheel rotational speed using speed probe, if a certain vehicle wheel rotational speed is substantially distinguished from other wheels,
Then infer the abnormal tyre pressure of the wheel.
Existing TPMS has as a drawback that：
First, alarming threshold value range is usually arranged wider, cause vehicle tyre pressure that can be changed in wide range, influences to go
Vehicle safety.Assuming that tire pressure normal value is 2.5bar, alarming threshold value range is typically set to be less than 1.8bar or is more than 3.2bar, then tire
1.8bar is pressed in will not all cause alarm between 3.2bar, and if the tire pressure of different kinds of tyre differs greatly still on same vehicle
There are security risks.
Second, TPMS only sends out alarm signal, and and acted without any adjusting to ensure traffic safety.Driver
Abnormal tire pressure can only be manually adjusted after the alarm for receiving TPMS makes it restore normal.If driver ignores TPMS
Alarm and continue to travel, then there is larger security risk.
A is please referred to Fig.1, the front axle (or hind axle) of vehicle is connected to two front-wheels (or trailing wheel) and controls turning for they
It is dynamic.When two coaxial tire pressure are consistent, vehicle body keeps horizontal.B is please referred to Fig.1, when two coaxial wheel nauseas
When pressing inconsistent, vehicle body no longer holding is horizontal but is tilted down in the lower tire location of tire pressure, and Fig. 1 b, which are used, more to be overstated
The technique of painting opened.Even if at this point, vehicle steering keep direction of advance and without any steering, the actual travel side of vehicle
To can also be biased to the lower tire direction of tire pressure.In addition, the rotating speed of the lower tire of tire pressure can faster, it is relatively low that this accelerates tire pressure
Tire wear, and traffic safety may be influenced.
Invention content
Technical problems to be solved in this application are to provide a kind of TPMS, can when coaxial tire pressure is inconsistent from
The dynamic steering for adjusting vehicle, so that the travel direction of vehicle will not be deviateed due to abnormal tyre pressure.
In order to solve the above technical problems, the tire pressure monitoring system of the application automatic adjustment includes：
--- multiple pressure sensors, air pressure for measuring each tire of vehicle are simultaneously uploaded to controller；
--- multiple speed probes, rotating speed for measuring each tire of vehicle are simultaneously uploaded to controller；
--- controller receives each tire pressure, each tire rotational speed, speed, calculates the angle for needing to correct, and control
The steering of vehicle carries out angle correction.
The implementation method of the tire pressure monitoring system of the application automatic adjustment includes the following steps：
1st step, controller receive each tire pressure, each tire rotational speed, speed；
2nd step, when coaxial tire pressure difference be more than threshold value when, controller according to each tire pressure, each tire rotational speed,
Speed obtains the angle for needing to correct；
3rd step, the steering that controller controls vehicle carry out angle correction.
The tire pressure monitoring system and its implementation of the application automatic adjustment can be in coaxial tire pressure exceptions, by turning to
System is corrected automatically, and vehicle is made to be maintained at scheduled track in the process of moving, ensures traffic safety.
Description of the drawings
Fig. 1 a are the schematic diagrames that the coaxial tire pressure of vehicle is consistent；
Fig. 1 b are the inconsistent schematic diagrames of the coaxial tire pressure of vehicle；
Fig. 2 is the structural schematic diagram of the tire pressure monitoring system of the application automatic adjustment；
Fig. 3 is the structural schematic diagram of one embodiment of the tire pressure monitoring system of the application automatic adjustment；
Fig. 4 is the flow chart of the implementation method of the tire pressure monitoring system of the application automatic adjustment.
Specific implementation mode
Referring to Fig. 2, the tire pressure monitoring system of the application automatic adjustment includes：
--- multiple pressure sensors, air pressure for measuring each tire of vehicle are simultaneously uploaded to controller.These pressure pass
Sensor may be mounted at the internal or external of each tire of vehicle.The tire pressure signal that these pressure sensors measure can be by wireless
Mode passes to controller, for example, radio communication, and controller also has wireless communication assembly at this time.These pressure sensors are surveyed
The tire pressure signal of amount can also pass to controller, for example, vehicle bus by wired harness.
--- multiple speed probes, rotating speed for measuring each tire of vehicle are simultaneously uploaded to controller.These rotating speeds pass
The tach signal that sensor measures by wired harness or can be wirelessly transmitted to controller, usually vehicle bus.
Generally equipped with ABS (Anti-lock Braking System, anti-lock braking system), ABS has to be surveyed vehicle
Measure the sensor of each vehicle wheel rotational speed.The TPMS of the application can obtain ABS signals of rotational speed sensor by vehicle bus, without
Individual speed probe is set.Alternatively, speed probe can be separately provided in the TPMS of the application.
--- controller receives each tire pressure, each tire rotational speed, speed, obtains the angle for needing to correct, and control vehicle
Steering carry out angle correction.Controller is, for example, the ECU (electronic control unit) or individual MCU of vehicle
(microcontroller), FPGA (field programmable gate array), PLD (programmable logic device) etc..Controller acquires speed letter
Number it is for being mutually authenticated with each tire rotational speed signal.
Vehicle first passes through many experiments in advance, to obtain in the different draught heads of coaxial tire, different wheel rotating speed, different vehicles
In the case of speed, angle that the travel direction of vehicle is deviateed due to abnormal tyre pressure.The deviation angle is just entangled as needs
Positive angle forms a tables of data to prestore.Controller is inquired to obtain the angle for needing to correct according to the tables of data.Alternatively,
The function obtained by experiment between draught head, vehicle wheel rotational speed, speed and the travel direction deviation angle of vehicle of coaxial tire closes
System.Controller calculates the angle for needing to correct according to the functional relation.The parameters of different automobile types are different, thus the tables of data
Or functional relation needs are individually demarcated according to vehicle.
The opposite direction progress that controller controls steering towards the deviation angle of vehicle is identical as the deviation angle
The angle of size is corrected.For example, in the case of some draught head of coaxial tire, some vehicle wheel rotational speed, some speed by
Experiment learns that the travel direction of vehicle can deviate 0.5 degree/min to the smaller wheel direction of tire pressure, then controller makes turning for vehicle
Angle to system away from 0.5 degree/min smaller of wheel direction progress of tire pressure is corrected.
Referring to Fig. 3, this is one embodiment that the tire pressure monitoring system of the application automatic adjustment is applied to four-wheel car.
Wherein, pressure sensor is installed in each tire to measure each tire pressure, pressure sensor is uploaded with radio frequency method and measures number
According to (shown in dotted line).There is the four-wheel car ABS, the ABS to have had four speed probes for measuring each tire rotational speed, rotating speed
Sensor uploads measurement data (shown in solid) by vehicle bus.One controller receives each pressure by radio-frequency communication component
The measurement data of sensor also obtains the measurement data and vehicle speed data of each speed probe by vehicle bus.The controller
According to these data, inquires the experimental data to prestore or the angle that need to be corrected is calculated according to the function to prestore.The controller
The steering for controlling vehicle again carries out angle correction.
Referring to Fig. 4, the implementation method of the tire pressure monitoring system of the application automatic adjustment includes the following steps：
1st step, each tire rotational speed, the speed that controller receives each tire pressure, speed probe measures.Each tire pressure
Such as come from mounted on each inside tires or external pressure sensor, control can be passed to by wired or wireless way
Device.Each tire rotational speed for example come from be separately provided or ABS in speed probe, usually transmitted with vehicle bus.Speed example
Such as come from the existing vehicle speed sensor of vehicle, ECU, is usually transmitted with vehicle bus.
The air pressure maximum value of coaxial multiple tires is subtracted air pressure minimum, obtains coaxial wheels nausea by the 2nd step, controller
Pressure difference.When coaxial tire pressure difference is more than threshold value, controller is obtained according to each tire pressure, each tire rotational speed, speed
Need the angle corrected.
Vehicle first passes through many experiments in advance, to obtain in the different draught heads of coaxial tire, different wheel rotating speed, different vehicles
In the case of speed, angle that the travel direction of vehicle is deviateed due to abnormal tyre pressure.When the draught head of coaxial tire is smaller
When, the travel direction of vehicle will not deviate.When the draught head of coaxial tire is larger, the travel direction of vehicle can just occur
Deviate.The draught head of coaxial tire when deviation has just taken place in the travel direction that vehicle can be obtained by experiment, as threshold value.It is different
The parameters of vehicle are different, thus threshold values needs are individually demarcated according to vehicle.
3rd step, the opposite direction that controller controls steering towards the deviation angle of vehicle carry out and the deflecting angle
The angle for spending same size is corrected.
In the 1st step of the method, controller also judges whether each tire rotational speed is correct with speed.If all tire rotating speed
Meet speed, then controller judges that each tire rotational speed signal is correct.If arbitrary tire rotational speed is not obviously inconsistent with speed, then control
Device processed judges that the tire rotational speed signal is wrong, and the error signal can be ignored, be simultaneously emitted by alarm signal.
In the 2nd step of the method, when coaxial tire pressure difference is more than threshold value, controller also sends out alarm signal.
Existing vehicle when coaxial tire pressure difference Δ P be more than threshold value (need to specifically being demarcated according to different automobile types) when,
Vehicle can deviate scheduled track in the process of moving, be biased to the smaller tire direction of air pressure, driver is needed to carry out at this time
It adjusts.The application can calculate and the angle compensated is needed to be transferred to steering when monitoring coaxial tire pressure exception, by
Steering is corrected automatically, and vehicle is made to be maintained at scheduled track in the process of moving, ensures traffic safety.
The tire pressure monitoring system and its implementation of the application automatic adjustment have the following advantages that：
First, can alarm coaxial tire pressure imbalance.
Second, can automatically adjust steering system in coaxial tire pressure imbalance and deviate predetermined traveling to avoid vehicle
Direction, this can reduce tire wear, arrive maintenace point nearby as early as possible convenient for driver and repair maintenance.
Third, pressure sensor, speed probe, speed signal mutually verify, avoids sensor fault and report by mistake
It is alert.
Fourth, can be used for vehicle it is unmanned in the case of direction correct.
The preferred embodiment that these are only the application is not used to limit the application.Those skilled in the art is come
It says, the application can have various modifications and variations.Within the spirit and principles of this application, any modification made by is equal
Replace, improve etc., it should be included within the protection domain of the application.
Claims (8)
1. a kind of tire pressure monitoring system of automatic adjustment, characterized in that including：
--- multiple pressure sensors, air pressure for measuring each tire of vehicle are simultaneously uploaded to controller；
--- multiple speed probes, rotating speed for measuring each tire of vehicle are simultaneously uploaded to controller；
--- controller receives each tire pressure, each tire rotational speed, speed, and the air pressure maximum value of coaxial multiple tires is subtracted
Air pressure minimum is removed, obtains that coaxial tire pressure is poor, when coaxial tire pressure difference is more than threshold value, controller is according to each wheel
Air pressure, each tire rotational speed, speed calculate the angle for needing to correct, and the steering for controlling vehicle carries out angle correction；
Calculate the angle for needing to correct in the following manner：Vehicle first passes through experiment to obtain the different gas in coaxial tire in advance
In the case of pressure difference, different wheel rotating speed, different speed, angle that the travel direction of vehicle is deviateed due to abnormal tyre pressure
Degree；
The angle that the deviation angle is just corrected as needs forms a tables of data to prestore；Controller is looked into according to the tables of data
Ask the angle for obtaining needing to correct；
Alternatively, between obtaining draught head, vehicle wheel rotational speed, speed and the travel direction deviation angle of vehicle of coaxial tire by experiment
Functional relation；Controller calculates the angle for needing to correct according to the functional relation.
2. the tire pressure monitoring system of automatic adjustment according to claim 1, characterized in that the pressure sensor, rotating speed
Measurement data is uploaded to controller by sensor by wired harness or wireless mode；
Wired harness includes vehicle bus；
The wireless mode includes radio communication.
3. the tire pressure monitoring system of automatic adjustment according to claim 1, characterized in that the speed probe is antilock
Speed probe in dead braking system or the sensor being separately provided.
4. the tire pressure monitoring system of automatic adjustment according to claim 1, characterized in that the controller is the electricity of vehicle
Sub-control unit, or individually microcontroller, field programmable gate array, programmable logic device.
5. the tire pressure monitoring system of automatic adjustment according to claim 1, characterized in that controller controls the steering of vehicle
The opposite direction of system towards the deviation angle corrected with the angle of the deviation angle same size.
6. a kind of implementation method of the tire pressure monitoring system of automatic adjustment, characterized in that include the following steps：
1st step, controller receive each tire pressure, each tire rotational speed, speed；
The air pressure maximum value of coaxial multiple tires is subtracted air pressure minimum by the 2nd step, and it is poor to obtain coaxial tire pressure, when same
When the tire pressure difference of axis is more than threshold value, controller obtains needing to correct according to each tire pressure, each tire rotational speed, speed
Angle；Calculate the angle for needing to correct in the following manner：Vehicle first pass through in advance experiment with obtain coaxial tire not
In the case of same draught head, different wheel rotating speed, different speeds, the travel direction of vehicle occurs due to coaxial tire pressure difference
The angle of deviation；The draught head of coaxial tire when deviation has just taken place as the side in the travel direction that vehicle is obtained by experiment
Threshold value in the 2nd step of method；
3rd step, the steering that controller controls vehicle carry out angle correction.
7. the implementation method of the tire pressure monitoring system of automatic adjustment according to claim 6, characterized in that the method
In 1 step, controller also judges whether each tire rotational speed signal is correct with speed signal.
8. the implementation method of the tire pressure monitoring system of automatic adjustment according to claim 6, characterized in that the method
In 2 steps, when coaxial tire pressure difference is more than threshold value, controller also sends out alarm signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510181469.4A CN106143003B (en) | 2015-04-16 | 2015-04-16 | The tire pressure monitoring system and its implementation of automatic adjustment |
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| CN201510181469.4A CN106143003B (en) | 2015-04-16 | 2015-04-16 | The tire pressure monitoring system and its implementation of automatic adjustment |
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| CN106143003B true CN106143003B (en) | 2018-08-21 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106828188A (en) * | 2017-01-20 | 2017-06-13 | 湖北文理学院 | The control method and control system of a kind of electric automobile |
| CN111391582A (en) * | 2020-03-26 | 2020-07-10 | 湖南行必达网联科技有限公司 | Tire pressure monitoring system and method |
| CN111605563B (en) * | 2020-05-22 | 2021-07-06 | 东风商用车有限公司 | Steering fault coping system and method for automatic driving vehicle |
| CN115352226B (en) * | 2022-09-02 | 2024-06-07 | 浙江吉利控股集团有限公司 | Tire pressure control method, device, equipment and readable storage medium |
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| US10035387B2 (en) * | 2007-11-30 | 2018-07-31 | Volvo Lastvagnar Ab | Wheel-monitoring module |
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| CN1613674A (en) * | 2003-11-05 | 2005-05-11 | 史建华 | Intelligent tyre-brust protector for motor vehicle |
| JP2008143197A (en) * | 2006-12-06 | 2008-06-26 | Toyota Motor Corp | Air pressure control system and air pressure control device |
| CN102303490A (en) * | 2011-06-28 | 2012-01-04 | 广西工学院 | Automobile tire burst prevention controller on basis of electrical power steering |
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| CN106143003A (en) | 2016-11-23 |
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