CN102765304A - Tyre pressure monitoring system and its automatic tyre location identification method - Google Patents
Tyre pressure monitoring system and its automatic tyre location identification method Download PDFInfo
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- CN102765304A CN102765304A CN2011101534430A CN201110153443A CN102765304A CN 102765304 A CN102765304 A CN 102765304A CN 2011101534430 A CN2011101534430 A CN 2011101534430A CN 201110153443 A CN201110153443 A CN 201110153443A CN 102765304 A CN102765304 A CN 102765304A
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Abstract
The invention provides a tyre pressure monitoring system and its automatic tyre location identification method. The tyre pressure monitoring system comprises sensing emitters which are respectively installed in automobile tyres and a receiving display system installed in a vehicle. According to the tyre pressure monitoring system and its automatic tyre location identification method provided by the invention, the automatic identification function can be completed only by detecting and calculating integrated signal intensity or calculating integrated signal intensity and tyre temperature value. With no operation by drivers, genuine automatic tyre location identification function of the tyre pressure monitoring system can be realized during tyre preassembling before leaving the factory or tyre repairing after leaving the factory.
Description
Technical field
The present invention relates to the vehicle electronics security fields, relate in particular to a kind of tire pressure monitoring system and tire thereof
The position automatic identifying method.
Background technology
Existing tire pressure monitoring system comprises two parts: be installed in sensing transmitter and the reception telltale (receive the signal of sensing transmitter emission and divide tire to show) that is installed in the car in each motor tire (branch front, rear, left and right).Each sensing transmitter all has an identity coding parameter, receives telltale and confirms the parameter which sensing transmitter (its corresponding tire) is sent according to the identity coding parameter of establishing in advance.Yet motor tire need be on the move, and the sensing transmitter identity coding parameter that receives the telltale stored so just need be revised along with the change of tire location again; On the other hand, do not store the identity coding parameter, just need corresponding identity coding parameter be set by the position, front, rear, left and right if receive in the telltale.
For example for originally having stored the reception telltale of identity coding parameter, No. 1 sensing transmitter is installed in left front tire, receives telltale and just No. 1 parameter is presented at the left front tire position.Be transferred to when right back when left front tire, receive telltale and still can No. 1 parameter be presented at the left front tire position, at this moment just need in the reception telltale, No. 1 parameter adjustment be set to the right rear fire position.
Existing solution has following several kinds:
Scheme one, manual in receiving telltale, the input is provided with the identity coding parameter.
Scheme two adopts the method for artificial venting identification that the identity coding parameter is set.When by hand certain position being set, receive telltale and wait for that correspondence bleeds a tire, this tire sends signals such as venting signal and identity coding parameter during venting, directly this identity coding parameter is arranged on this position after the reception of reception telltale.
Scheme three adopts the dedicated radio frequency transceiver, and first opsition dependent excites and read the identity coding parameter of each tire in proper order, is input to receive telltale (or car running computer) again.
Scheme four, the low frequency wake-up method is installed low-frequency antenna near each tire, and each antenna all is connected respectively to the reception telltale, triggers the sensing transmitter emission parameter of each tire more in order respectively with low-frequency antenna, reaches identifying purpose.
Because tire pressure monitoring system will use with car basically all the life, several kinds of above-mentioned existing identity coding parametric techniques that are provided with have following shortcoming:
The manual plan of establishment of similar such scheme one, two, three all needs the professional step of a cover, needs the professional, operates cumbersomely, and terminal client is difficult to from line operate.And for motor plant, tire pressure monitoring system is installed in enormous quantities also needs the professional to operate, and cost is than higher.
The automatic identifying schemes of the employing low frequency wake-up of similar such scheme four; Because this scheme need increase wiring in the car; Cost is higher, and the battery service life of adopting the low frequency wake-up mode can reduce sensing transmitter, is unfavorable for long-term use and large-scale promotion.
Industry also has some, and other utilize the scheme of the locating wheel fetal position of direction sensor, but the location time needs Control of Automobile high speed original place to spin, and navigating mate is required very high (causing dizziness easily), and are therefore also also impracticable.
Therefore, the recognition methods of existing tire pressure monitoring system and tire location thereof is badly in need of improving.
Summary of the invention
The purpose of this invention is to provide a kind of tire pressure monitoring system and tire location automatic identifying method thereof, be intended to solve existing tire pressure monitoring system complicated operation and the higher technological deficiency of cost.
For realizing the foregoing invention purpose; The present invention provides a kind of tire pressure monitoring system; It comprises sensing transmitter that is installed in the motor tire and the receiving and displaying system that is installed in the car; Said receiving and displaying system comprise central processing unit and with central processing unit bonded assembly signal receiving unit, said signal receiving unit comprises a receiving wire and signal strength measurement circuit.
Further, said signal receiving unit is RF (radio frequency) acceptor circuit, and said receiving wire is the RF receiving wire.
Further, said system further comprises display unit, operation interface, data interface unit, built-in acousto-optic warning unit in the said display unit.
Further, a sensing transmitter, built-in data acquisition and change-over circuit, MCU, signal transmission circuit and emitting antenna in each sensing transmitter are installed in said each tire.
For realizing the foregoing invention purpose, the present invention provides a kind of tire location automatic identifying method of tire pressure monitoring system, it is characterized in that may further comprise the steps:
Step a, the integrated signal intensity order of each sensing transmitter that the setting receiving and displaying system receives;
Step b, signal receiving unit receives abundant number of times with the signal of each sensing transmitter during vehicle ', and adds up respectively and obtain the signal synthesis strength rating, carries out order according to integrated signal strength rating size and arranges;
Step c compares the order that obtains among order among the step a and the step b, confirms the position of sensing transmitter, and then confirms pairing tire location.
More specifically, further comprise following learning process:
Sensing transmitter position by each tire of this car manually is arranged on the identity parameter of sensing transmitter in the receiving and displaying system earlier;
Program is decided the integrated signal strength rating order of confirming of each position sensing transmitter according to step b algorithm when vehicle ';
Under the moving situation of the invariant position of antenna, the change of any tyre sensing transmitter all definite integrated signal intensity order of basis is discerned and definite tire location automatically.
For realizing the foregoing invention purpose; The present invention also provides a kind of tire location automatic identifying method of tire pressure monitoring system; It may further comprise the steps, the integrated signal strength rating of sensing transmitter emission and tyre temperature identification tire location in each tire that receives in conjunction with receiving and displaying system: with the position of tyre temperature value or tyre temperature changing value identification front and back tire; Position with integrated signal strength rating identification left and right sides tire.
More specifically, said combination integrated signal strength rating and tyre temperature identification tire location specifically may further comprise the steps: setting vehicle is f-w-d or back-wheel drive, and height or temperature traverse according to tyre temperature during vehicle ' are distinguished the front and back tire; The receiving wire riding position of selective reception telltale, the integrated signal strength rating than two tires in cooresponding the right are big or little respectively to make the integrated signal strength rating that receive two left side tires during vehicle ', distinguish the position, the left and right sides of tire thus.
More specifically; It is characterized in that; Said combination integrated signal strength rating and tyre temperature identification tire location specifically may further comprise the steps: the receiving wire riding position of selective reception display system; Make the integrated signal intensity of a tire that receives be in maxim (or minimum value) in four tires; Simultaneously the integrated signal intensity of its same cincture tire is confirmed its position according to integrated signal maximum of intensity (or minimum value) greater than the integrated signal intensity of (or less than) corresponding another side tire during vehicle ', the position of the same (or with back) tire of distinguishing it according to the height or the temperature traverse of tyre temperature; Position, the left and right sides by integrated signal intensity, distinguishes tire.
More specifically, further comprise following learning process:
Sensing transmitter position by each tire of this car manually is arranged on the identity parameter of sensing transmitter in the receiving and displaying system earlier;
Program is decided the integrated signal strength rating order and the temperature value order of each position sensing transmitter when vehicle ';
Under the moving situation of the invariant position of antenna, the change of any tyre is definite integrated signal intensity order and the temperature value order of basis all, automatically identification and definite tire location.
Than prior art; Tire pressure monitoring system provided by the invention and tire location automatic identifying method thereof; Only through detection computations integrated signal strength rating (or calculating integrated signal strength rating and tyre temperature value); Just can accomplish automatic recognition function, and though dispatch from the factory before the prepackage tire or dispatch from the factory after repairing, navigating mate need not operated the automatic recognition function of the tire location that just can realize real tire pressure monitoring system.
Description of drawings
Fig. 1 is the structural representation of the tire pressure monitoring system that provides of preferred embodiment of the present invention.
Fig. 2 is the structural representation of the receiving and displaying system that the present invention relates to.
Fig. 3 is the diagram of circuit of tire location automatic identifying method of the present invention preferred embodiment.
The specific embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Shown in Fig. 1, the tire pressure monitoring system that preferred embodiment of the present invention provides comprises two parts: be installed in the sensing transmitter 110,120,130,140 in each motor tire (comprising left front tire 11, right front fire 12, left rear tire 13, right rear fire 14) respectively and be installed in the receiving and displaying system 10 in the car.
Built-in data acquisition and change-over circuit, MCU (microcontroller), RF transmission circuit and emitting antenna etc. in described each sensing transmitter 110,120,130,140 because the structure of sensing transmitter belongs to the prior art category, are not given unnecessary details at this.Sensing transmitter carries out the data induction, gathers, launches, and in the present embodiment, adopts RF (radio frequency) signal to launch.The data of gathering and launching include but not limited to: temperature data, pressure data, acceleration information, status data, cell pressure data, identity coding data etc.Parameter such as acceleration information and cell pressure belongs to optional data.Sensing transmitter can not have battery yet.
In conjunction with referring to shown in Fig. 2; The main functions such as the receptions of RF signal, processing data and display alarm of accomplishing of receiving and displaying system 10, it comprise central processing unit 103 and respectively with central processing unit 103 bonded assembly RF receiving elements 101 (comprising receiving wire and signal strength measurement circuit), display unit 104, operation interface 105 (being used for manually being provided with alarm parameters, sensing transmitter identity parameter and other correlation parameter), data interface unit 106 (being used for) with there being related parameter to pass to the interface of miscellaneous equipment.Central processing unit 103 representative types can adopt MCU, can built-in acousto-optic warning unit in the display unit 104 etc.
Also can integrated Reverse Sensor unit 107 in the receiving and displaying system 10 etc.Receiving and displaying system 10 receives and handles the data that each sensing transmitter 110,120,130,140 is launched.
Each sensing transmitter 110,120,130,140 is by certain time interval during vehicle '; Transmitting RF signal separately; After receiving and displaying system 10 receives the signal that each sensing transmitter 110,120,130,140 sends; Confirm it is the data of tire of which position through the identity coding of discerning, judge the situation of this tire through data handing, and report to the police accordingly, demonstration etc.
The tire location automatic identifying method of the tire pressure monitoring system that preferred embodiment of the present invention provides may further comprise the steps:
Get into the monitoring alarm program then, when tire pressure and other parameter occur reporting to the police when unusual and show the position of this tire.
In said method; Because the intensity of the sensing transmitter signal that tire receives in the middle of motion fluctuates; Can not all stably obtain identical intensity order, so must just can obtain stable comprehensive strength value order through repeatedly repeated measurement at every turn.
In said process; Because the riding position of receiving wire has determined the comprehensive strength value order of sensing transmitter signal; Yet receiving wire can not be placed in ideal position or because during surrounding environment change; The intensity order of tire before and after can influencing, so the second embodiment of the present invention may further comprise the steps: combine integrated signal strength rating and tyre temperature (perhaps temperature traverse) identification tire location.Because general automobile all is f-w-d or back-wheel drive, after a period of time that is characterized in going, during f-w-d, the temperature of front-wheel (perhaps temperature traverse) is apparently higher than trailing wheel; During back-wheel drive, the temperature of trailing wheel (perhaps temperature traverse) is apparently higher than front-wheel.The temperature data of the present invention's sensing transmitter capable of using is distinguished the front and back position of tire, and detailed process is following:
Distinguish the front and back tire according to the height (perhaps temperature traverse) of tyre temperature, certainly, it be f-w-d or back-wheel drive that the method needs to set vehicle in advance; The receiving wire riding position of selective reception telltale, the integrated signal strength rating than two tires in cooresponding the right are big or little respectively to make the integrated signal strength rating that receive two left side tires during vehicle ', distinguish the position, the left and right sides of tire.
Also can adopt following recognition methods:
The receiving wire riding position of selective reception telltale; Make the integrated signal intensity of a tire receiving (such as No. 11, left front tire) be in maxim in four tires during vehicle ', the integrated signal intensity of its same limit (being all the left side or the right) tire (such as No. 13, left rear tire) must be greater than its integrated signal intensity of corresponding tire (such as right rear fire 14) simultaneously.Behind definite left front tire 11, during vehicle ', No. 11 integrated signal intensity maximum is confirmed as left front tire like this, temperature close (perhaps temperature traverse is close) be right front fire 12.For two tires in back, because the integrated signal strength rating of left rear tire 13 greater than right rear fire 14, therefore can be easy to distinguish latter two tire location.It is forerunner or rear-guard that this method does not need to set in advance vehicle, directly confirms tire all around.
In said process, when receiving and displaying system uses tyre temperature to distinguish the front and back tire, can receive the one or more signals of same sensing transmitter; The use tyre temperature changes when distinguishing the front and back tire, needs to receive a plurality of signals of same sensing transmitter.
Above-mentioned tire location automatic identifying method provided by the invention only needs automobile normal running, measures RF signal strength that each sensing transmitter launches or RF signal strength and tyre temperature value and can judge tire location automatically.
Tire location automatic identifying method provided by the invention is also considered the change that causes integrated signal strength rating order owing to the shift in position of antenna; And this change is unpredictable (or when first the installation sometimes; Not through measuring; Its integrated signal strength rating order is unpredictable), therefore also comprise following " learning process ", promptly obtain the integrated signal strength rating order of confirming automatically:
(1) first opsition dependent manually sets the identity parameter of sensing transmitter.Be positioned at such as 110 left front, 120 be positioned at right front, 130 be positioned at left back, 140 be positioned at right back;
(2) program is decided the integrated signal intensity order of each position (or decide integrated signal strength rating order and temperature order) according to above algorithm when vehicle '.Such as integrated signal intensity: 110＞120＞130＞140 (or integrated signal intensity: 110 maximums, 130＞140; 110 and 120 temperature is close, and 130 and 140 temperature is close);
(3) under the moving situation of the invariant position of antenna, the change of any tyre can be according to definite integrated signal intensity order (or according to integrated signal intensity order and temperature value order of confirming), automatic identification and definite tire location after.After 110 and 140 position was exchanged, we obtained the new order 140＞120＞130＞110 of integrated signal strength rating, just can confirm 140 be positioned at left front; 120 be positioned at right front, 130 be positioned at left back, 110 be positioned at right back (or after 110 and 140 position is exchanged; We obtain integrated signal intensity 140 maximums and are positioned at left frontly, and 120 and 140 temperature is close to be positioned at right frontly, and 110 and 130 temperature is close; Integrated signal intensity 130＞110,130 is positioned at left back, 110 be positioned at right back; ).
Each aerial position change all needs to use above-mentioned learning process to confirm integrated signal strength rating order (or integrated signal strength rating order and temperature value order) earlier.
Simultaneously, in the signal reception and computation process of receiving and displaying system 10, not to get a characteristics of signals that receives, but the overall characteristic of a plurality of signals.
The a/s order of the signal strength of each sensing transmitter that receives in order to ensure receiving and displaying system 10 is arranged, and the receiving wire of receiving and displaying system 10 is laid and can be adopted following method:
The receiving wire riding position of A, selective reception telltale makes the signal strength values of each sensing transmitter that it receives different;
B adopts the antenna of band directivity, makes each sensing transmitter be in different directions, thereby obtains various signals strength rating ordering;
C adopts the means of blocking to make the signal strength of each sensing transmitter produce different decay, thereby obtains various signals strength rating ordering.
The above signal strength that receives is meant the electromagnetic parameter of signal, and it includes but not limited to: the RSS (reception signal strength) of the intensity of signal, the amplitude of signal, RSSI of signals (receiving the signal strength indication), signal etc. can be through calculating the parameter of signal strength.
Because tire is in the middle of motion; The intensity of the sensing transmitter signal that receives also in fluctuation, can not all stably obtain identical intensity order at every turn, so must be through after repeatedly measuring; Through various algorithms, just can obtain each all stably identical intensity order again.Described algorithm includes but not limited to: advanced line linearity of intensity data or Nonlinear Processing (or not handling); A, the stack of multiple signal data, the method that compares at last; B, multiple signal data maxim comparative approach; C, multiple signal data minimum value comparing method; D, multiple signal data aviation value comparative approach; F, one of them sensing transmitter is received a plurality of signals within a certain period of time get maxim and minimum value and subtract each other and to obtain its changing value; The one or more combination of e, the above method of use.Can guarantee all stably to obtain identical intensity order so at every turn.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention.This method also is suitable for the mechanical tire pressure monitoring system of other many wheels.All any modifications of within spirit of the present invention and principle, being done, be equal to replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. tire pressure monitoring system; It comprises sensing transmitter that is installed in the motor tire and the receiving and displaying system that is installed in the car; It is characterized in that said receiving and displaying system comprise central processing unit and with central processing unit bonded assembly signal receiving unit; Said signal receiving unit comprises a receiving wire, signal receiving circuit and signal strength measurement circuit.
2. tire pressure monitoring system according to claim 1 is characterized in that, said signal receiving unit is the RF receiving element, and said receiving wire is the RF receiving wire.
3. tire pressure monitoring system according to claim 1 is characterized in that, further comprises display unit, operation interface, data interface unit, built-in acousto-optic warning unit in the said display unit.
4. tire pressure monitoring system according to claim 1 is characterized in that, a sensing transmitter, built-in data acquisition and change-over circuit, MCU, signal transmission circuit and emitting antenna in each sensing transmitter are installed in said each tire.
5. according to the tire location automatic identifying method of the said tire pressure monitoring system of claim 1, it is characterized in that may further comprise the steps:
Step a, the integrated signal intensity order of each sensing transmitter that the setting receiving and displaying system receives;
Step b, signal receiving unit receives abundant number of times with the signal of each sensing transmitter during vehicle ', and carries out computing respectively and obtain the signal synthesis strength rating, carries out order according to integrated signal strength rating size and arranges;
Step c compares the order that obtains among order among the step a and the step b, confirms the position of sensing transmitter, and then confirms pairing tire location.
6. tire location automatic identifying method according to claim 5 is characterized in that further comprising following learning process:
Sensing transmitter position by each tire of this car manually is arranged on the identity parameter of sensing transmitter in the receiving and displaying system earlier;
Program is decided the integrated signal strength rating order of confirming of each position sensing transmitter according to step b algorithm when vehicle ';
Under the moving situation of the invariant position of antenna, the change of any tyre sensing transmitter all definite integrated signal intensity order of basis is discerned and definite tire location automatically.
7. according to the tire location automatic identifying method of the said tire pressure monitoring system of claim 1; It is characterized in that may further comprise the steps the integrated signal strength rating of sensing transmitter emission and tyre temperature identification tire location in each tire that receives in conjunction with receiving and displaying system: with the position of tyre temperature value or tyre temperature changing value identification front and back tire; Position with integrated signal strength rating identification left and right sides tire.
8. tire location automatic identifying method according to claim 7; It is characterized in that; Said combination integrated signal strength rating and tyre temperature identification tire location specifically may further comprise the steps: setting vehicle is f-w-d or back-wheel drive, and height or temperature traverse according to tyre temperature during vehicle ' are distinguished the front and back tire; The receiving wire riding position of selective reception telltale makes the integrated signal strength rating that receive two left side tires respectively than the integrated signal strength rating big (or little) of two tires in cooresponding the right during vehicle ', distinguish the position, the left and right sides of tire thus.
9. tire location automatic identifying method according to claim 7; It is characterized in that; Said combination integrated signal strength rating and tyre temperature identification tire location specifically may further comprise the steps: the receiving wire riding position of selective reception display system; Make the integrated signal intensity of a tire that receives be in maxim (or minimum value) in four tires; Simultaneously the integrated signal intensity of its same cincture tire is greater than the integrated signal intensity of (or less than) corresponding another side tire; Confirm its position according to integrated signal maximum of intensity (or minimum value) during vehicle ', distinguish the position of its same (or with back) tire according to the height of tyre temperature or temperature traverse; Position, the left and right sides by integrated signal intensity, distinguishes tire.
10. according to each described tire location automatic identifying method in the claim 7 to 9, it is characterized in that further comprising following learning process:
Sensing transmitter position by each tire of this car manually is arranged on the identity parameter of sensing transmitter in the receiving and displaying system earlier;
Program is decided the integrated signal strength rating order and the temperature value order of each position sensing transmitter when vehicle ';
Under the moving situation of the invariant position of antenna, the change of any tyre is definite integrated signal intensity order and the temperature value order of basis all, automatically identification and definite tire location.
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| CN2011101534430A CN102765304A (en) | 2011-05-04 | 2011-06-09 | Tyre pressure monitoring system and its automatic tyre location identification method |
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| CN201110114130.4 | 2011-05-04 | ||
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| CN2011101534430A CN102765304A (en) | 2011-05-04 | 2011-06-09 | Tyre pressure monitoring system and its automatic tyre location identification method |
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| CN103538431A (en) * | 2013-09-30 | 2014-01-29 | 深圳市加力尔电子科技有限公司 | Automatic TPMS (Tire Pressure Monitor System) tire positioning method and system |
| CN104417289A (en) * | 2013-08-20 | 2015-03-18 | 车王电子股份有限公司 | Code convertor and code conversion method thereof |
| CN108454328A (en) * | 2018-02-07 | 2018-08-28 | 迅阜贸易（上海）有限公司 | Tire source location discrimination method and system |
| CN109572335A (en) * | 2018-12-06 | 2019-04-05 | 铁将军汽车电子股份有限公司 | Tire localization method and system |
| CN109774388A (en) * | 2019-01-28 | 2019-05-21 | 深圳市元征科技股份有限公司 | A kind of vehicle tyre method for detecting abnormality, system and relevant device |
| CN112292273A (en) * | 2018-06-20 | 2021-01-29 | 大陆汽车有限公司 | Method for detecting wheel unit of vehicle and wheel mounting position belonging to wheel unit, and wheel information system |
| CN112297723A (en) * | 2020-10-09 | 2021-02-02 | 东莞赛富特汽车安全技术有限公司 | Automatic identification system and method for trailer of drop and pull transport vehicle |
| CN116056916A (en) * | 2020-09-02 | 2023-05-02 | 普利司通美国轮胎运营有限责任公司 | Vehicle tire positioning system and method using temperature rise data |
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| CN116056916A (en) * | 2020-09-02 | 2023-05-02 | 普利司通美国轮胎运营有限责任公司 | Vehicle tire positioning system and method using temperature rise data |
| CN112297723A (en) * | 2020-10-09 | 2021-02-02 | 东莞赛富特汽车安全技术有限公司 | Automatic identification system and method for trailer of drop and pull transport vehicle |
| CN112297723B (en) * | 2020-10-09 | 2023-07-04 | 东莞赛富特汽车安全技术有限公司 | Automatic trailer identification system and method for drop-and-pull transport vehicle |
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