CN106274307A - Tire pressure monitoring method and system based on CAN - Google Patents
Tire pressure monitoring method and system based on CAN Download PDFInfo
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- CN106274307A CN106274307A CN201510277633.1A CN201510277633A CN106274307A CN 106274307 A CN106274307 A CN 106274307A CN 201510277633 A CN201510277633 A CN 201510277633A CN 106274307 A CN106274307 A CN 106274307A
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Abstract
The present invention relates to a kind of tire pressure monitoring method based on CAN, including step: step one, main frame obtains vehicle data information from automobile CAN-bus, it is judged that travel condition of vehicle；Step 2, according to the running status that vehicle is different, the sensor assembly that host computer control is arranged in each tire of vehicle enters different mode of operations.The tire pressure monitoring method based on CAN of the present invention possess low-power consumption, be capable of system host with the feature of sensor assembly interactive communication.
Description
Technical field
The present invention relates to vehicle tyre pressure monitoring field, a kind of tire pressure monitoring method and system based on CAN.
Background technology
Tire is the important component part of automobile chassis, and tire all plays the most crucial effect to the economy of control stability, safety, comfortableness and the fuel oil of automobile.In order to ensure vehicle safety travel, it is common that install TPMS(Tire on automobile
Pressure Monitor System, tire pressure monitoring system) monitor the parameters such as the pressure of tire, temperature in real time, thus monitor, show and confirm the duty of tire, and to tire occur unusual condition (such as superpressure, under-voltage, overtemperature, pressure fluctuations etc.) and alarm, with guarantee driving safety, prevent from blowing out.According to statistics, annual 260000 vehicle accidents of the U.S. are owing to tire pressure is low or seepage causes, and have 70% ~ 80% by initiation of blowing out in the vehicle accident that China Expressway occurs.Therefore, blow out the potential safety hazard having become important in scorch.
The system host of current tire pressure monitoring system is by storage battery power supply on car, and the sensor assembly being arranged in tire is then by lithium battery power supply and battery cannot be changed.Current tire pressure monitoring system there is problems in that 1) tire pressure monitoring system very power consumption；2), under the emitter long-play of tire pressure monitoring system, damage, reduction of service life are easily caused；3) it is the purpose reaching power saving, needs during manufacture to increase hardware cost.
Summary of the invention
It is an object of the invention to provide a kind of low-power consumption, be capable of system host with the tire pressure monitoring method and system based on CAN of sensor assembly interactive communication.
A kind of tire pressure monitoring method based on CAN, is applied to a tire pressure monitoring system, and tire pressure monitoring system includes main frame and is respectively arranged in the sensor assembly of each inside tires of vehicle；Sensor assembly is used for obtaining tire pressure and tire internal temperature value；Tire pressure monitoring method based on CAN includes step:
Step one, main frame obtains vehicle data information from automobile CAN-bus, it is judged that travel condition of vehicle；
Step 2, according to the running status that vehicle is different, the sensor assembly that host computer control is arranged in each tire of vehicle enters different mode of operations；
Wherein, the corresponding different transmitting strategy of the different working modes of sensor assembly；Launch strategy and include that sensor assembly sends the strategy of data to main frame；Sensor assembly sends data by high-frequency emission sky alignment main frame.
Further, mode of operation includes transporting memory module, match pattern, car-parking model and operational mode.
Further, step 2 specifically includes:
According to the different running statuses of vehicle, main frame generates configuration order corresponding with travel condition of vehicle；
Main frame passes through low-frequency antenna sensor assembly in each tire of vehicle and sends configuration order；And
After sensor assembly receives configuration order, enter corresponding mode of operation.
Further, when main frame detects automobile flameout signal from automobile CAN-bus, main frame is transmitted into the configuration order of car-parking model to each sensor assembly, and each sensor assembly enters car-parking model；
When main frame detects vehicle velocity signal from automobile CAN-bus, main frame is transmitted into the configuration order of operational mode to each sensor assembly, and each sensor assembly enters operational mode.
Further, transmitting strategy when sensor assembly is in car-parking model is: sensor assembly enters deep sleep, only when main frame detects automobile ignition signal from described automobile CAN-bus, main frame sends control instruction to sensor assembly, and to the present tire pressure of tire and temperature value is sampled and the data transmission of collection is updated by sensor assembly to main frame to make sensor assembly.
Further, sensor assembly is in the transmitting strategy of operational mode and is: if when varying more than a pre-set velocity value of car speed, main frame gets tire pressure and temperature value from each sensor assembly, and calculates and set intervalometer；After intervalometer transmission interrupt signal wakes up sensor assembly up, tire pressure and temperature value are sampled by sensor assembly；If the sample temperature value that sensor assembly is adjacent twice varies more than a preset temperature value or tire pressure varies more than a preset pressure value, current tire pressure and temperature value are sent to main frame by sensor assembly, do not send data to main frame.
Further, transport memory module enters the mode of operation configured before tire by sensor assembly, and its transmitting strategy is: sensor assembly enters deep sleep, does not sends data to main frame.
Further, match pattern is the initial operation mode after sensor assembly enters tire, after sensor assembly is loaded tire, main frame sends corresponding configuration-direct makes sensor assembly enter match pattern, and sensor ID number is sent to main frame and stores by sensor assembly.
The present invention also provides for a kind of tire pressure monitoring system based on CAN, including main frame and the sensor assembly that is installed on each inside tires of vehicle；Main frame and sensor assembly realize wireless telecommunications by low-frequency antenna；Sensor assembly is used for detecting tire pressure and tire internal temperature value；Main frame is connected with vehicle CAN bus, and main frame obtains vehicle data information from vehicle CAN bus, it is judged that travel condition of vehicle；Main frame, according to the different running status of vehicle, controls sensor assembly and enters different mode of operations.
Further, the mode of operation of sensor assembly includes transporting memory module, match pattern, car-parking model and operational mode.
The tire pressure monitoring method and system based on CAN of the present invention obtain travel condition of vehicle by CAN, and enter different mode of operations according to the sensor assembly in the running status control tire of vehicle, sensor assembly is made to use different transmitting strategies under different mode of operations, to reduce the purpose of power consumption；The host module of tire pressure monitoring system is realized mutual with the communication of sensor assembly so that main frame can better control over sensor assembly by wireless communication mode.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the tire pressure monitoring system based on CAN of an embodiment.
Detailed description of the invention
It is described in further detail below in conjunction with specific embodiment and accompanying drawing tire pressure monitoring based on CAN to present invention method.
The tire pressure monitoring method based on CAN of the present invention is applied to the tire pressure monitoring system of automobile, tire pressure monitoring system includes main frame and is respectively arranged in the sensor assembly of each inside tires of vehicle, sensor assembly is used for obtaining tire pressure and tire internal temperature value, and tire pressure and the tire internal temperature value of acquisition are fed back to main frame.Wherein, sensor assembly is by lithium battery power supply.
In one preferred embodiment, the tire pressure monitoring method based on CAN of the present invention includes step:
Step one, the main frame of tire pressure monitoring system obtains vehicle data information, such as vehicle ignition/misfire signals, car speed etc. from automobile CAN-bus, it is judged that travel condition of vehicle；
Step 2, according to the running status that vehicle is different, the sensor assembly that the host computer control of tire pressure monitoring system is arranged in each tire of vehicle enters different mode of operations, and wherein under different mode of operations, sensor assembly has different transmitting strategies.Launching strategy is that sensor assembly launches the strategy of data, such as tranmitting frequency, launching condition etc. to main frame.Sensor assembly sends data by high-frequency emission sky alignment main frame, and main frame is provided with the high frequency receiving antenna for receiving the data that high-frequency emission antenna sends.Owing to high-frequency emission is to cause the biggest factor of sensor assembly power consumption, therefore, the present invention, by the design sensor assembly transmitting strategy when different mode, i.e. launches duration, launching condition, tranmitting frequency etc., can reduce the power consumption of sensor assembly.
Step 2 specifically includes following steps:
According to the different running statuses of vehicle, main frame generates configuration order corresponding with travel condition of vehicle；
Main frame passes through low-frequency antenna sensor assembly in each tire of vehicle and sends configuration order；
After sensor assembly receives configuration order, enter corresponding mode of operation.
The mode of operation of sensor assembly includes transporting memory module, match pattern, car-parking model and operational mode.
Wherein, transport memory module is before sensor assembly enters tire, and after tire pressure monitoring system carries out system test and functional test to main frame and sensor assembly, main frame sends configuration order by low-frequency antenna makes sensor assembly enter transport memory module.Under transport memory module, the transmitting strategy of sensor assembly is: sensor assembly enters deep sleep, i.e. sensor assembly and do not reruns, do not carries out the sampling of pressure or temperature, does not launches data to main frame；Further, under transport memory module, the interrupt signal that sensor assembly is set to be sent by intervalometer wakes up up, is merely able to the low frequency signal sent by main frame, and the configuration order that i.e. main frame is sent by low-frequency antenna wakes up up.Therefore, before sensor assembly enters tire, make sensor assembly enter transport memory module, it is possible to reduce the power consumption of sensor assembly.
Match pattern is the mode of operation that sensor assembly installs the configuration to tire.Sensor assembly is installed to tire, main frame sends configuration order to sensor assembly, sensor assembly is made to enter match pattern, under match pattern, the transmitting strategy of sensor assembly is: sensor just can transmit oneself sensor ID number by high-frequency signal after only receiving the wake-up signal and coupling order that main frame sends, and main frame replys ack signal after receiving sensor ID number, and sensor assembly stops launching after receiving, go successively to deep sleep, wait next wake command.Sensor ID number is sent to main frame, host record storage sensor ID by sensor assembly, and main frame can be facilitated to be independently controlled each sensor assembly.
When main frame detects automobile flameout signal from automobile CAN-bus, it is judged that vehicle enters dead ship condition, and main frame is transmitted into the configuration order of car-parking model to each sensor assembly, each sensor assembly enters car-parking model after receiving configuration order.Under car-parking model, the transmitting strategy of sensor assembly is: sensor assembly enters deep sleep, does not rerun and does not sends data to main frame；Only when main frame detects to automobile ignition signal from automobile CAN-bus, main frame just sends control instruction to each sensor assembly, make each sensor assembly that present tire pressure and the temperature value of tire to be sampled, and the data gathered extremely are sent to main frame by sensor assembly, main frame updates present tire pressure and tire internal temperature value.
When from automobile CAN-bus, main frame detects that vehicle velocity signal is not zero, judge that vehicle starts mobile, entering running status, main frame is transmitted into the configuration order of operational mode to each sensor assembly, and each sensor assembly enters operational mode after receiving configuration order.In the operating mode, the transmitting strategy of sensor assembly is: main frame obtains car speed from automobile CAN-bus, if car speed vary more than a pre-set velocity value (such as, 5km/h), then main frame sends control instruction to each sensor assembly, makes each sensor assembly sample present tire pressure and temperature value and send to main frame；Main frame calculates timer time according to tire pressure and temperature value and sets intervalometer；Intervalometer is after sensor assembly transmission interrupt signal is to wake up sensor assembly up, and tire pressure and temperature value are sampled by sensor assembly；If the sample temperature value that sensor assembly is adjacent twice varies more than a preset temperature value (such as, 1 DEG C) or tire pressure vary more than a preset pressure value (such as 10Kpa), present tire pressure and temperature value are sent to main frame by sensor assembly, do not send data to main frame.The strategy of launching of operational mode lower sensor module had both achieved the monitoring to tire, it is ensured that vehicle runs safety, reduces the power consumption of sensor assembly the most largely.
The tire pressure monitoring method based on CAN of the present invention, realizes communication by low-frequency antenna between main frame and sensor assembly mutual, it is possible to be preferably monitored tire pressure；And main frame obtains information of vehicles from automobile CAN-bus, more accurately and reliably judge travel condition of vehicle.
The present invention also provides for a kind of tire pressure monitoring system based on CAN, as it is shown in figure 1, in a preferred embodiment, tire pressure monitoring system based on CAN includes main frame and is installed on the sensor assembly of each inside tires of vehicle.Main frame and sensor assembly realize wireless telecommunications by low-frequency antenna.Sensor assembly is used for detecting tire pressure and tire internal temperature value.Main frame is connected with vehicle CAN bus, for obtaining vehicle data information from vehicle CAN bus, thus judges the running status of vehicle.Main frame, according to the different running status of vehicle, controls sensor assembly and enters different mode of operations.Sensor assembly under different working modes has different transmitting strategies, to reduce the purpose of power consumption.Wherein, the mode of operation of sensor assembly includes transporting memory module, match pattern, car-parking model and operational mode.
The tire pressure monitoring method and system based on CAN of the present invention obtain travel condition of vehicle by CAN, and enter different mode of operations according to the sensor assembly in the running status control tire of vehicle, sensor assembly is made to use different transmitting strategies under different mode of operations, to reduce the purpose of power consumption；The host module of tire pressure monitoring system is realized mutual with the communication of sensor assembly so that main frame can better control over sensor assembly by wireless communication mode.
Carry out although the description of this invention combines embodiments above, but, those skilled in the art can carry out many replacement, modifications and variations according to above-mentioned content, be apparent from.Therefore, all such replacements, improve and change in the spirit and scope being included in appended claims.
Claims (10)
1. a tire pressure monitoring method based on CAN, is applied to a tire pressure monitoring system, and described tire pressure monitoring system includes main frame and is respectively arranged in the sensor assembly of each inside tires of vehicle；Described sensor assembly is used for obtaining tire pressure and tire internal temperature value；It is characterized in that, including step:
Step one, main frame obtains vehicle data information from automobile CAN-bus, it is judged that travel condition of vehicle；
Step 2, according to the running status that vehicle is different, the sensor assembly that host computer control is arranged in each tire of vehicle enters different mode of operations；
Wherein, the corresponding different transmitting strategy of the different working modes of described sensor assembly；Described strategy of launching includes that described sensor assembly sends the strategy of data to described main frame；Described sensor assembly sends data by main frame described in high-frequency emission sky alignment.
Tire pressure monitoring method based on CAN the most according to claim 1, it is characterised in that
Described mode of operation includes transporting memory module, match pattern, car-parking model and operational mode.
Tire pressure monitoring method based on CAN the most according to claim 2, it is characterised in that described step 2 specifically includes:
According to the different running statuses of vehicle, described main frame generates configuration order corresponding with described travel condition of vehicle；
Described main frame passes through low-frequency antenna sensor assembly in each tire of vehicle and sends configuration order；And,
After described sensor assembly receives configuration order, enter corresponding mode of operation.
Tire pressure monitoring method based on CAN the most according to claim 3, it is characterized in that, when described main frame detects automobile flameout signal from described automobile CAN-bus, described main frame is transmitted into the configuration order of car-parking model to described each sensor assembly, and described each sensor assembly enters car-parking model；
When described main frame detects vehicle velocity signal from described automobile CAN-bus, described main frame is transmitted into the configuration order of operational mode to described each sensor assembly, and described each sensor assembly enters operational mode.
Tire pressure monitoring method based on CAN the most according to claim 4, it is characterized in that, transmitting strategy when described sensor assembly is in car-parking model is: sensor assembly enters deep sleep, only when described main frame detects automobile ignition signal from described automobile CAN-bus, described main frame sends control instruction to described sensor assembly, and to the present tire pressure of tire and temperature value is sampled and the data transmission of collection is updated by sensor assembly to main frame to make described sensor assembly.
Tire pressure monitoring method based on CAN the most according to claim 4, it is characterized in that, described sensor assembly is in the transmitting strategy of operational mode: if when varying more than a pre-set velocity value of described car speed, described main frame gets tire pressure and temperature value from described each sensor assembly, and calculates and set intervalometer；After described intervalometer transmission interrupt signal wakes up described sensor assembly up, tire pressure and temperature value are sampled by described sensor assembly；If the sample temperature value that sensor assembly is adjacent twice varies more than a preset temperature value or tire pressure varies more than a preset pressure value, current tire pressure and temperature value are sent to described main frame by described sensor assembly, do not send data to described main frame.
Tire pressure monitoring method based on CAN the most according to claim 2, it is characterised in that
Described transport memory module enters the mode of operation configured before tire by described sensor assembly, and its transmitting strategy is: described sensor assembly enters deep sleep, does not sends data to described main frame.
Tire pressure monitoring method based on CAN the most according to claim 2, it is characterized in that, described match pattern is the initial operation mode after described sensor assembly enters tire, after described sensor assembly is loaded tire, described main frame sends corresponding configuration-direct makes described sensor assembly enter match pattern, and sensor ID number is sent to the storage of described main frame by described sensor assembly.
9. a tire pressure monitoring system based on CAN, it is characterised in that include main frame and be installed on the sensor assembly of each inside tires of vehicle；Described main frame and described sensor assembly realize wireless telecommunications by low-frequency antenna；Described sensor assembly is used for detecting tire pressure and tire internal temperature value；Described main frame is connected with vehicle CAN bus, and described main frame obtains vehicle data information from vehicle CAN bus, it is judged that travel condition of vehicle；Described main frame, according to the different running status of vehicle, controls described sensor assembly and enters different mode of operations.
Tire pressure monitoring system based on CAN the most according to claim 9, it is characterised in that the mode of operation of described sensor assembly includes transporting memory module, match pattern, car-parking model and operational mode.
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| CN201510277633.1A CN106274307A (en) | 2015-05-27 | 2015-05-27 | Tire pressure monitoring method and system based on CAN |
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| CN201510277633.1A CN106274307A (en) | 2015-05-27 | 2015-05-27 | Tire pressure monitoring method and system based on CAN |
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| CN106314045A (en) * | 2016-08-17 | 2017-01-11 | 北京中聚高科科技有限公司 | Tire pressure monitoring device and method based on bus awakening mode |
| CN107264192A (en) * | 2017-06-23 | 2017-10-20 | 深圳市凯佑安防设备有限公司 | The device for monitoring tyre pressure and detection method of a kind of four-wheel Auto-matching |
| CN107433828A (en) * | 2017-08-14 | 2017-12-05 | 北京车和家信息技术有限责任公司 | Tire pressure monitoring system, vehicle, tire pressure monitoring method and computer equipment |
| CN109660506A (en) * | 2017-10-11 | 2019-04-19 | 大众汽车有限公司 | Message sequence and identification are transmitted to the method and apparatus of the attack of message sequence |
| CN111873722A (en) * | 2020-07-30 | 2020-11-03 | 深圳市元征科技股份有限公司 | Tire pressure sensor address writing method and related device thereof |
| CN112455167A (en) * | 2020-12-08 | 2021-03-09 | 安徽江淮汽车集团股份有限公司 | Tire pressure sensor ID acquisition method, tire pressure sensor ID acquisition device and computer-readable storage medium |
| CN113195267A (en) * | 2019-06-17 | 2021-07-30 | 空中客车营运有限公司 | Initialization of tire monitoring device |
| CN114559776A (en) * | 2022-04-01 | 2022-05-31 | 成都肯保捷芯辰传感器有限公司 | Non-motor vehicle tire pressure monitoring system and monitoring method |
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| CN111873722A (en) * | 2020-07-30 | 2020-11-03 | 深圳市元征科技股份有限公司 | Tire pressure sensor address writing method and related device thereof |
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| CN114559776B (en) * | 2022-04-01 | 2024-04-16 | 成都肯保捷芯辰传感器有限公司 | Non-motor vehicle tire pressure monitoring system and monitoring method |
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Application publication date: 20170104 |