CN102825986B - A kind of tire inflation pressure determining system judges the method for high-frequency signal transmission quality - Google Patents
A kind of tire inflation pressure determining system judges the method for high-frequency signal transmission quality Download PDFInfo
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- CN102825986B CN102825986B CN201110164713.8A CN201110164713A CN102825986B CN 102825986 B CN102825986 B CN 102825986B CN 201110164713 A CN201110164713 A CN 201110164713A CN 102825986 B CN102825986 B CN 102825986B
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Abstract
The present invention relates to a kind of method that tire inflation pressure determining system judges high-frequency signal transmission quality, tire pressure monitoring module MCU detects each parameter, by condition judgment the need of transmitting; The data that every frame is launched, the extra sequence number increasing frame one group of transmitting data; Data are often launched once, and sequence number update once; Tire pressure monitoring module data transmitting terminal increases a state of kinematic motion position; At motoring condition, tire pressure monitoring module data transmitting terminal reported a frame information within T=5 minute, in automobile non-driving state, when inside tires is detected parameter change, then transmitted.The present invention increases the counting machine of an emitting times at the transmitting data of the transmitting terminal of tire pressure monitoring module, and this sequence number is sent out, receiving end carries out sequence number compare receiving adjacent signals that same tire sends, see that whether meeting it has set sequence number rule, simultaneously, in conjunction with motoring condition whether, high-frequency signal transmission quality is judged.
Description
Technical field
The present invention relates to a kind of method that tire inflation pressure determining system judges high-frequency signal transmission quality, belong to tire pressure monitoring technical field.
Background technology
Tire inflation pressure determining system utilizes to be arranged on the air pressure that each pressure sensor of taking turns tyre cavity directly measures tire, then by wireless launcher, pressure information is sent to the system of base station from inside tires.Base station is shown by telltale receiving tire pressure signal, simultaneously when tire pressure is too low, Tai Gao or gas leakage time, system can automatic alarm.The principle of work of tire inflation pressure determining system is that each tire of automobile can install a tire pressure monitoring module.Each tire pressure monitoring module not only detects the pressure of inside tires, the temperature while of also in monitoring tyres; In order to power saving, tire pressure monitoring module is provided with acceleration/accel transmitter, determines the need of each information parameter carrying out periodic report inside tires according to road speed.Tire pressure monitoring module monitors each information parameter of inside tires, then by high frequency wireless transmission by this signal transmission to base station.The information of usual transmission comprises the pressure of inside tires, temperature, the power supply voltage of tire pressure monitoring module and the state of kinematic motion of tire.
Tire pressure monitoring module is the pressure of monitoring tyres inside, temperature, the power supply voltage of tire pressure monitoring module and the state of kinematic motion of tire independently; Meanwhile, what tire pressure monitoring module was autonomous sends base station by high-frequency signal to these signals.Therefore, tire pressure monitoring module is a kind of autonomous mode of operation.Whether when the unpredictable tire pressure monitoring module in base station works, and when sends signal, be received Gu its there is no telling tire pressure monitoring module sends signal.Simultaneously, pressure detecting system is very harsh to the power consumption requirements of tire pressure monitoring module, it can not each parameter state to base station repeats tire pressure monitoring module in cycle, only detect that automobile is in motoring condition in tire pressure monitoring module, or the pressure of inside tires or temperature are when changing, tire pressure monitoring module just needs the various parameters to base station repeats inside tires.Namely allow to periodic report data, but when the various informations parameter of inside tires change, system requires real-time response again.This in other words, tire transmitting terminal is unpredictable to Base Transmitter report data.Therefore how to allow the high-frequency signal of base station synchronization tire pressure monitoring module transfer, in other words, how judging the stability of Signal transmissions, is a great problem.And in order to ride safety of automobile, driver must know whether this Signal transmissions is stablized, in other words, driver must know that whether tire pressure monitoring module is in running order, and how to judge that whether tire pressure monitoring module is in running order, can only judge from receiving tire pressure monitoring module by signal.
Summary of the invention
The object of this invention is to provide a kind of state that can maintain whole system low-power consumption, learn the high-frequency signal transmission quality of whole system, by high-frequency signal transmission quality, can judge whether tire pressure monitoring module has been in the method for the tire inflation pressure determining system judgement high-frequency signal transmission quality of normal work.
The object of the invention is to be achieved through the following technical solutions:
Method of the present invention comprises:
Tire pressure monitoring module MCU detects each parameter, by condition judgment the need of transmitting; The data that every frame is launched, the extra sequence number increasing frame one group of transmitting data; Adopt 52 ary codes to mark the sequence number of every frame signal, data are often launched once, and sequence number update once; Tire pressure monitoring module data transmitting terminal increases a state of kinematic motion position; At motoring condition, tire pressure monitoring module data transmitting terminal reported a frame information within T=5 minute, in automobile non-driving state, when inside tires is detected parameter change, then transmitted.
Advantage of the present invention is: the counting machine increasing an emitting times at the transmitting data of the transmitting terminal of tire pressure monitoring module, and this sequence number is sent out, receiving end carries out sequence number compare receiving adjacent signals that same tire sends, see that whether meeting it has set sequence number rule, simultaneously, in conjunction with motoring condition whether, high-frequency signal transmission quality is judged.Can judge the signal transmission quality between tire pressure monitoring module and base station easily, and the power consumption of whole system is very low.
Detailed description of the invention
The present invention is described in further detail below: the present embodiment is implemented under premised on technical solution of the present invention, gives detailed embodiment and specific operation process, but protection scope of the present invention is not limited to following embodiment.
First, tire pressure monitoring module MCU after having detected each parameter, by condition judgment the need of transmitting.If launching condition is set up, then prepare commencing signal and launch.The frame data preparing the data of launching are defined as follows:
| Frame ID | Header | Order | Sensor ID+5 bit sequence number | Pressure | Temperature | Battery | CRC check |
Data are often launched once, and sequence number update once.The mode that program employing order of the present invention increases upgrades sequence number.Suppose that the frame data sequence number of current transmitting is S_Current.Base station receiver, to after receiving these frame data, takes out its sequence number S_Current, and is assumed to be S_Last in the sequence number that the last time receives and subtracts each other, and difference is S, and formula is:
S＝S_Current-S_Last
Note: because adopt 5 codings, if S_Current < is S_Last, S=32-S_Last+S_Current is owing to being the arrangement of employing order, if S=1, do not have obliterated data in the middle of so illustrating, signal and communication quality is very good.If S > 1, so illustrate that S lost (S-1) individual data, communication quality is bad.(S-1) larger, illustrate that communication quality is poorer.
Certainly, only increase this sequence number, signal stationary problem can not be solved completely.Because base station does not also know when tire transmitting terminal is launched, do not know whether transmitting terminal is all in not emission state always yet.Only can judge whether meet sequence number rule, be to have no idea thoroughly to solve signal stationary problem if receiving signal from sequence number.Because consider from the power saving of tire pressure detection module, it is impossible periodically to base station repeats signal, otherwise its can be depleted to battery electric power very soon.Therefore, invention increases a synchronized transmissions end and receiving end.The transmitting data content of every frame signal is as follows:
| Frame ID | Header | Order+1 state of kinematic motion | Sensor ID+5 bit sequence number | Pressure | Temperature | Battery | CRC check |
Tire pressure monitoring module data transmitting terminal adds a state of kinematic motion position.Its meaning representation is as follows:
1: tire is kept in motion
0: automobile is in non-athletic motoring condition
Usually, in order to power saving is considered, the velocity amplitude detected by acceleration of motion, lower than 20 kilometers/hour, represents that tire is in non-running movement state, when speed is greater than this value, represents that tire is in motion motoring condition.
When the data motion mode bit that base station demodulates goes out transmitting terminal is 1 time, represent that tire is in motoring condition, this time, tire transmitting terminal will report a frame information again within 5 minutes.If base station did not receive data within 5 minutes, illustrate that high frequency transmission signal is deteriorated, base station will provide signal designation.Because every 5 minutes, have at least frame data to launch, as long as therefore every 5 minutes, confiscate frame data, represent and lost frame data.
When the data motion mode bit that base station demodulates goes out transmitting terminal is 0 time, represent that tire pressure monitoring module is in non-driving state, this time, tire transmitting terminal only at pressure, just report information when temperature changes.Base station does not need at the appointed time to detect whether receive high-frequency signal.When only needing to receive signal, upgrade the sequence number that it receives signal.
The present invention under the state maintaining whole system low-power consumption, can learn the high-frequency signal transmission quality of whole system, by high-frequency signal transmission quality, can judge whether tire pressure monitoring module has been in normal work.Therefore, the present invention can meet the requirement that to signal transmission quality judge of driver to tire inflation pressure determining system completely.
The above; be only the present invention's preferably detailed description of the invention; these detailed description of the invention are all based on the different implementations under general idea of the present invention; and protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (2)
1. tire inflation pressure determining system judges a method for high-frequency signal transmission quality, and it is characterized in that, tire pressure monitoring module MCU detects each parameter, by condition judgment the need of transmitting; The data that every frame is launched, the extra sequence number increasing frame one group of transmitting data; Adopt 52 ary codes to mark the sequence number of every frame signal, data are often launched once, and sequence number update once; Tire pressure monitoring module data transmitting terminal increases a state of kinematic motion position; At motoring condition, tire pressure monitoring module data transmitting terminal reported a frame information within T=5 minute, in automobile non-driving state, when inside tires is detected parameter change, then transmitted;
The mode that employing order increases upgrades sequence number, supposes that the frame data sequence number of current transmitting is S_Current; Base station receiver, to after receiving these frame data, takes out its sequence number S_Current, and is assumed to be S_Last in the sequence number that the last time receives and subtracts each other, and difference is S, and formula is:
S＝S_Current-S_Last
If S_Current < is S_Last, S=32-S_Last+S_Current, if S=1, does not have obliterated data in the middle of illustrating, if S > 1, and the individual data that illustrate that S lost (S-1).
2. tire inflation pressure determining system according to claim 1 judges the method for high-frequency signal transmission quality, it is characterized in that, when the data motion mode bit that base station demodulates goes out transmitting terminal is 1 time, represents that tire is in motoring condition; When the data motion mode bit that base station demodulates goes out transmitting terminal is 0 time, represent that tire pressure monitoring module is in non-driving state.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110164713.8A CN102825986B (en) | 2011-06-17 | 2011-06-17 | A kind of tire inflation pressure determining system judges the method for high-frequency signal transmission quality |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110164713.8A CN102825986B (en) | 2011-06-17 | 2011-06-17 | A kind of tire inflation pressure determining system judges the method for high-frequency signal transmission quality |
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| CN102825986A CN102825986A (en) | 2012-12-19 |
| CN102825986B true CN102825986B (en) | 2015-08-26 |
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| KR101953565B1 (en) * | 2016-11-02 | 2019-03-04 | 현대자동차주식회사 | System and Operating Method For Tire Pressure Monitoring |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1586932A (en) * | 2004-08-31 | 2005-03-02 | 武汉虹信通信技术有限责任公司 | Tyre pressure real time monitor system |
| CN101227483A (en) * | 2008-02-03 | 2008-07-23 | 北京天碁科技有限公司 | Data processing method and apparatus of wireless link control layer |
| CN101332749A (en) * | 2008-02-20 | 2008-12-31 | 东南大学 | Monitoring method and device of vehicle tyre data |
| CN101483934A (en) * | 2008-12-19 | 2009-07-15 | 北京邮电大学 | Segmented adaptive multi-path routing mechanism having topology sensing capability |
| CN102006173A (en) * | 2010-10-28 | 2011-04-06 | 武汉中元华电科技股份有限公司 | Method and device for expanding Ethernet interface |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1586932A (en) * | 2004-08-31 | 2005-03-02 | 武汉虹信通信技术有限责任公司 | Tyre pressure real time monitor system |
| CN101227483A (en) * | 2008-02-03 | 2008-07-23 | 北京天碁科技有限公司 | Data processing method and apparatus of wireless link control layer |
| CN101332749A (en) * | 2008-02-20 | 2008-12-31 | 东南大学 | Monitoring method and device of vehicle tyre data |
| CN101483934A (en) * | 2008-12-19 | 2009-07-15 | 北京邮电大学 | Segmented adaptive multi-path routing mechanism having topology sensing capability |
| CN102006173A (en) * | 2010-10-28 | 2011-04-06 | 武汉中元华电科技股份有限公司 | Method and device for expanding Ethernet interface |
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