CN105946473A - Indirect type tire pressure monitoring method and device - Google Patents
Indirect type tire pressure monitoring method and device Download PDFInfo
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- CN105946473A CN105946473A CN201610294000.6A CN201610294000A CN105946473A CN 105946473 A CN105946473 A CN 105946473A CN 201610294000 A CN201610294000 A CN 201610294000A CN 105946473 A CN105946473 A CN 105946473A
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- wheel
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- rotating speed
- tire pressure
- indirect type
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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
Abstract
The invention relates to an indirect type tire pressure monitoring method and device. The method includes the following steps that data acquisition is conducted, wherein rotation speed data of four wheels are obtained; and calculation and judgment are conducted, wherein the wheel with the largest rotation speed is found out, the sum of the rotation speed of the wheel and the rotation speed of the diagonal wheel of the wheel serves as first data, the sum of the rotation speeds of the other two wheels serves as second data, and if the first data are larger than the second data, it is judged that the wheel with the largest rotation speed is the wheel with the low tire pressure. The method is simple in calculation, easier to achieve, small in resource consumption and high in speed.
Description
Technical field
The present invention relates to the tire pressure monitoring field of automobile, particularly indirect type tire pressure monitoring, specifically a kind of indirect type tire pressure monitoring method and apparatus.
Background technology
At present, tire pressure monitoring technical point direct-type and indirect type two kinds.Direct-type is installation pressure and temperature sensor in inside tires or valve, directly measures tire pressure and tire temperature, when tire pressure and tire temperature alert when reaching the limit values.Indirect type is mainly based upon four wheel speeds of ABS and judges, when the air pressure of certain tire reduces, the rotating speed of this wheel can be accelerated under the same conditions, thus, in conjunction with calculating, i.e. can determine whether that tire pressure is the most normal.Also have with reference to vehicle operation data, or judge according to the resonance during tire running, alert when relevant parameter reaches to arrange threshold value.
Indirect type tire pressure monitoring typically requires the air pressure of certain condition, such as certain tire less than other tire more than 30%, and Vehicle Speed reaches just can be monitored to during certain value, and not can determine that the particular location of abnormal tire.
The Chinese patent application " a kind of indirect type tire pressure monitoring method based on OBD interface " of Application No. 201510411457.6 discloses a kind of indirect type tire pressure monitoring method, after collecting vehicle wheel rotational speed data, its calculation is: each group of vehicle wheel rotational speed data are calculated meansigma methods and the rate of change of relative deviation of the relative deviation of vehicle wheel rotational speed, then the meansigma methods of revised relative deviation and the rate of change of relative deviation are compared with safety criterion, if beyond safety criterion value, sending prompting.
Scheme above can directly judge which wheel is anomalous wheel, but its calculating is sufficiently complex, and needs to store standard value to compare.
Summary of the invention
It is an object of the invention to provide a kind of indirect type tire pressure monitoring method, calculate complicated problem in order to solve existing indirect type tire pressure monitoring.
For achieving the above object, the solution of the present invention includes:
A kind of indirect type tire pressure monitoring method, comprises the following steps that
Data collection steps: obtain the rotary speed data of four wheels；
Calculate and judge step: find out the wheel of maximum (top) speed, with the rotating speed of this wheel and its diagonal angle wheel with for data one, with the rotating speed of other two wheels with for data two, if data one are more than data two, then judge that the wheel of this maximum (top) speed is the wheel that tire pressure is low.
Also include data correction step, for eliminating the different impact on rotating speed of tire radius under standard tire pressure.
Also include the step carrying out reporting to the police.
In data acquisition, also include the step that data are filtered.
Described find out maximum (top) speed wheel during: first detection front left wheel whether rotating speed is the highest, then detection right front wheel whether rotating speed is the highest, then detection rear left wheel whether rotating speed is the highest, finally detection right rear wheel whether rotating speed is the highest.
Present invention also offers a kind of indirect type device for monitoring tyre pressure, including:
Data acquisition module: obtain the rotary speed data of four wheels；
Calculate judge module: find out the wheel of maximum (top) speed, with the rotating speed of this wheel and its diagonal angle wheel with for data one, with the rotating speed of other two wheels with for data two, if data one are more than data two, then judge that the wheel of this maximum (top) speed is the wheel that tire pressure is low.
Also include data correction module, for eliminating the different impact on rotating speed of tire radius under standard tire pressure.
Also include the module carrying out reporting to the police.
In data acquisition, also include the module carrying out that data are filtered.
Described find out maximum (top) speed wheel during: first detection front left wheel whether rotating speed is the highest, then detection right front wheel whether rotating speed is the highest, then detection rear left wheel whether rotating speed is the highest, finally detection right rear wheel whether rotating speed is the highest.
The method is not limited by speed, by cumulative mechanism, it is exaggerated abnormal tire pressure wheel and normal tire is delayed unloading the difference of rotating speed between wheel, when 1 tire air pressure less than other tire 10% and above time just can monitor, and can designate that particular location, the method is by comparing the tachometer value on two diagonal simultaneously, it is to avoid Ackermann steer angle is because of the wrong report being caused the impact of diverse location vehicle wheel rotational speed.
The method of the present invention calculates simple, is more prone to realize, expends resource few, and speed is fast.And do not limited by speed, and can designate that particular location, the method take into account Ackermann steer angle simultaneously affects the rotating speed of diverse location wheel, makes result more accurate.
Detailed description of the invention
The present invention will be further described in detail below.
Embodiment of the method
Patent of the present invention relates to a kind of new computational methods, is used in the commercial car of all installation ABS, and especially ABS itself is sent out the vehicle of four-wheel tach signal, and low cost, installation are simply.
The method of the present embodiment comprises the following steps that
Data collection steps: obtain the rotary speed data of four wheels；
Data correction step: eliminate the different impact on rotating speed of tire radius under standard tire pressure.
Calculate and judge step: find out the wheel of maximum (top) speed, with the rotating speed of this wheel and its diagonal angle wheel with for data one, with the rotating speed of other two wheels with for data two, if data one are more than data two, then judge that the wheel of this maximum (top) speed is the wheel that tire pressure is low.
Concrete, first allow vehicle linear running on smooth road surface, range ability cannot be below 2km, and period gathers the tire rotational speed of four positions with the time interval cycle of 50ms, and in calculating this time period, the accumulated value of each position tire rotational speed, is set to Ni, i=1,2,3,4, wherein 1～4 the most corresponding the near front wheel of automobile, off-front wheel, left rear wheel, off hind wheel.ThenkiCorrection factor for corresponding wheel.This correction factor is for eliminating the different impact on rotating speed of tire radius under standard tire pressure.
Then vehicle is properly functioning, gathers the tire rotational speed of four positions with the gap periods of 50ms, and continuous acquisition 120s, in calculating this time period, the accumulated value of each position tire rotational speed, is set to Pi, available revised value PSi=kiPi, i=1,2,3,4, wherein 1～4 the most corresponding the near front wheel of automobile, off-front wheel, left rear wheel, off hind wheel.
Finally calculate and judge:
If PS1>PS2、PS1>PS3、PS1>PS4, and PS1+PS4>PS2+PS3Time, then left front tire forces down；
If PS2>PS1、PS2>PS3、PS2>PS4, and PS1+PS4<PS2+PS3Time, then right front fire forces down.
If PS3>PS1、PS3>PS2、PS3>PS4, and PS1+PS4<PS2+PS3Time, then left rear tire forces down；
If PS4>PS1、PS4>PS2、PS4>PS3, and PS1+PS4>PS2+PS3Time, then right rear fire forces down.
Then reporting to the police, pointing out certain wheel is the wheel that tire pressure is low.
In above example, being to judge wheel successively, order is from the near front wheel of automobile, off-front wheel, left rear wheel, until off hind wheel.
As other embodiments, it is also possible to be different orders.Can also is that and directly find the wheel that four wheel medium speeds are maximum, then with the rotating speed of this wheel and its diagonal angle wheel with for data one, with the rotating speed of other two wheels with for data two, if data one are more than data two, then judge that the wheel of this maximum (top) speed is the wheel that tire pressure is low.The algorithm searching maximum value is easily realized by processor, and therefore the method for the present invention calculates the simplest.
It addition, in the present embodiment, it is also possible to first it is filtered the wheel data gathered processing, calculates the most again and judge, so can reject the abnormal rotating speed impact on judging in vehicle travel process.
As other embodiments, it is also possible to without correction factor, collection data are processed and directly use collection data.
Device embodiment
The device for monitoring tyre pressure of the present invention, including:
Data acquisition module: obtain the rotary speed data of four wheels；
Data correction module: eliminate the different impact on rotating speed of tire radius under standard tire pressure.
Calculate judge module: find out the wheel of maximum (top) speed, with the rotating speed of this wheel and its diagonal angle wheel with for data one, with the rotating speed of other two wheels with for data two, if data one are more than data two, then judge that the wheel of this maximum (top) speed is the wheel that tire pressure is low.
The device for monitoring tyre pressure of the present invention, is a kind of software component, runs in corresponding controller (such as entire car controller).Need to be provided four-wheel rotary speed data by ABS system to controller.
It is presented above the detailed description of the invention that the present invention relates to, but the present invention is not limited to described embodiment.Under the thinking that the present invention is given; use the mode being readily apparent that to those skilled in the art that the technological means in above-described embodiment is converted, replaces, revised; and the goal of the invention that the effect played is essentially identical with the relevant art means in the present invention, realize is the most essentially identical; the technical scheme so formed is finely adjusted formation to above-described embodiment, and this technical scheme still falls within protection scope of the present invention.
Claims (10)
1. an indirect type tire pressure monitoring method, it is characterised in that comprise the following steps that
Data collection steps: obtain the rotary speed data of four wheels；
Calculate and judge step: find out the wheel of maximum (top) speed, with the rotating speed of this wheel and its diagonal angle wheel be
Data one, with the rotating speed of other two wheels with for data two, if data one are more than data two, then judge that this is
The wheel of big rotating speed is the wheel that tire pressure is low.
A kind of indirect type tire pressure monitoring method the most according to claim 1, it is characterised in that also wrap
Include data correction step, for eliminating the different impact on rotating speed of tire radius under standard tire pressure.
A kind of indirect type tire pressure monitoring method the most according to claim 1, it is characterised in that also wrap
Include the step carrying out reporting to the police.
A kind of indirect type tire pressure monitoring method the most according to claim 1, it is characterised in that counting
According in gatherer process, also include the step carrying out that data are filtered.
5. according to a kind of indirect type tire pressure monitoring method according to any one of claim 1-4, its feature
Be, described in find out maximum (top) speed wheel during: first detection front left wheel whether rotating speed is the highest, so
Whether rotating speed is the highest for rear detection right front wheel, and then whether rotating speed is the highest for detection rear left wheel, finally detects the right side
Whether rotating speed is the highest for rear wheel.
6. an indirect type device for monitoring tyre pressure, it is characterised in that including:
Data acquisition module: obtain the rotary speed data of four wheels；
Calculate judge module: find out the wheel of maximum (top) speed, with the rotating speed of this wheel and its diagonal angle wheel be
Data one, with the rotating speed of other two wheels with for data two, if data one are more than data two, then judge that this is
The wheel of big rotating speed is the wheel that tire pressure is low.
A kind of indirect type device for monitoring tyre pressure the most according to claim 6, it is characterised in that also wrap
Include data correction module, for eliminating the different impact on rotating speed of tire radius under standard tire pressure.
A kind of indirect type device for monitoring tyre pressure the most according to claim 6, it is characterised in that also wrap
Include the module carrying out reporting to the police.
A kind of indirect type device for monitoring tyre pressure the most according to claim 6, it is characterised in that counting
According in gatherer process, also include the module carrying out that data are filtered.
10. according to a kind of indirect type device for monitoring tyre pressure according to any one of claim 6-9, its feature
Be, described in find out maximum (top) speed wheel during: first detection front left wheel whether rotating speed is the highest, so
Whether rotating speed is the highest for rear detection right front wheel, and then whether rotating speed is the highest for detection rear left wheel, finally detects the right side
Whether rotating speed is the highest for rear wheel.
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| CN201610294000.6A CN105946473B (en) | 2016-05-05 | 2016-05-05 | A kind of indirect type tire pressure monitoring method and apparatus |
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| CN201610294000.6A CN105946473B (en) | 2016-05-05 | 2016-05-05 | A kind of indirect type tire pressure monitoring method and apparatus |
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| CN105946473B CN105946473B (en) | 2018-04-20 |
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| CN108805031A (en) * | 2018-05-16 | 2018-11-13 | 赵超超 | A kind of indirect type tire pressure monitoring scheme and scheme detailed rules for the implementation that can show absolute tire pressure value based on wheel speed signal spectrum signature |
| CN110789278A (en) * | 2018-08-02 | 2020-02-14 | 郑州宇通客车股份有限公司 | Tire pressure monitoring method and device |
| CN113232613A (en) * | 2021-07-07 | 2021-08-10 | 江铃汽车股份有限公司 | System for detecting operation safety of vehicle nonstandard hub and control method |
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| CN204451862U (en) * | 2015-02-13 | 2015-07-08 | 陕西汽车集团有限责任公司 | The two remaining vehicle tyre pressure monitor and alarm systems of modularization and this commercial vehicle/comm..vehicle |
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| CN108805031A (en) * | 2018-05-16 | 2018-11-13 | 赵超超 | A kind of indirect type tire pressure monitoring scheme and scheme detailed rules for the implementation that can show absolute tire pressure value based on wheel speed signal spectrum signature |
| CN110789278A (en) * | 2018-08-02 | 2020-02-14 | 郑州宇通客车股份有限公司 | Tire pressure monitoring method and device |
| CN113232613A (en) * | 2021-07-07 | 2021-08-10 | 江铃汽车股份有限公司 | System for detecting operation safety of vehicle nonstandard hub and control method |
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| CN105946473B (en) | 2018-04-20 |
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Address after: 450061 Yudao Road, Guancheng District, Zhengzhou City, Henan Province Patentee after: Yutong Bus Co., Ltd Address before: 450016 Yutong Industrial Zone, eighteen Li River, Henan, Zhengzhou Patentee before: Zhengzhou Yutong Bus Co., Ltd |
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