WO2008044540A1 - Système de gestion d'informations de pneu - Google Patents
Système de gestion d'informations de pneu Download PDFInfo
- Publication number
- WO2008044540A1 WO2008044540A1 PCT/JP2007/069264 JP2007069264W WO2008044540A1 WO 2008044540 A1 WO2008044540 A1 WO 2008044540A1 JP 2007069264 W JP2007069264 W JP 2007069264W WO 2008044540 A1 WO2008044540 A1 WO 2008044540A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sensor module
- data
- radio wave
- module
- transmission
- Prior art date
Links
Classifications
-
- 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
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
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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
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
- B60C23/0422—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver characterised by the type of signal transmission means
- B60C23/0433—Radio signals
- B60C23/0435—Vehicle body mounted circuits, e.g. transceiver or antenna fixed to central console, door, roof, mirror or fender
- B60C23/0438—Vehicle body mounted circuits, e.g. transceiver or antenna fixed to central console, door, roof, mirror or fender comprising signal transmission means, e.g. for a bidirectional communication with a corresponding wheel mounted receiver
- B60C23/0442—Vehicle body mounted circuits, e.g. transceiver or antenna fixed to central console, door, roof, mirror or fender comprising signal transmission means, e.g. for a bidirectional communication with a corresponding wheel mounted receiver the transmitted signal comprises further information, e.g. instruction codes, sensor characteristics or identification data
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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
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
- B60C23/0422—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver characterised by the type of signal transmission means
- B60C23/0433—Radio signals
- B60C23/0447—Wheel or tyre mounted circuits
- B60C23/0455—Transmission control of wireless signals
- B60C23/0462—Structure of transmission protocol
Definitions
- the present invention relates to a sensor module that measures tire state quantities including tire internal pressures that are mounted in tires mounted on a vehicle and transmits measured data, and receives data from these sensor modules.
- the present invention relates to a tire information management system comprising: an antenna; and a vehicle-side module that instructs each sensor module to transmit the data via these antennas and obtains data transmitted from each sensor module.
- a sensor module for measuring a tire state quantity such as a tire pressure is attached to the inner surface of the tire, and measurement data transmitted from the sensor module etc.
- a tire information management system is known in which the vehicle body side module receives this information and informs the driver of tire abnormalities based on this signal, and is used for managing the tire usage status, etc. For example, see Patent Document 1.
- Patent Document 1 JP-A-10-104103
- the sensor module mounted in the rotating tire is driven by a built-in primary battery.
- the sensor module is potted with resin to protect the built-in electronic components from moisture, gas, and other dust, and since the primary battery cannot be replaced, the sensor module life depends on the primary battery life. Is done.
- the primary battery is also required to be lightweight at the same time, its capacity is limited. Therefore, in order to extend the life of the battery, it is important to reduce the power consumption, and various proposals have been made, but they still satisfy the required level. Absent.
- the inventor in the prior art, the transmission radio wave intensity when the sensor module transmits the data signal to the vehicle body side module is the same regardless of which vehicle the sensor module is attached to. We focused on the fact that it is set to the maximum allowable value and can be easily changed so that it does not interfere with data transmission regardless of the tire mounting position on the vehicle.
- the present invention has been made based on such a point of view, and an object of the present invention is to provide a tire management system capable of greatly reducing the power consumption of the sensor module, and thus the sensor module. It is to greatly improve the service life.
- the invention ⁇ 1> includes a sensor module that is mounted in each tire mounted on a vehicle and that measures a tire state quantity including tire internal pressure and transmits the measured data, and data from these sensor modules.
- a tire information management system comprising a receiving antenna and a vehicle-side module that transmits a command for requesting data transmission to each sensor module through these antennas and acquires data transmitted from each sensor module.
- the sensor module includes transmission radio wave intensity control means for controlling transmission radio wave intensity in data transmission, and the transmission radio wave intensity control means transmits transmission radio waves in the next data transmission based on the transmission radio wave intensity settings received from the reception module. Configured to control strength,
- the vehicle-side module has a received signal strength measuring means for measuring the received signal strength of the data signal transmitted from the sensor module for each sensor module, and is transmitted from the sensor module last time.
- a tire information management system configured to create the transmission radio field strength setting according to the reception radio field strength of the data signal and add the transmission radio field strength setting to the command to the next sensor module.
- ⁇ 2> is the invention according to ⁇ 1>!
- the vehicle-side module transmits the command to each sensor module for each sensor module, and then returns reply data from the sensor module. If there is a communication elapsed time measuring means that measures the time elapsed until reception
- Both are tire information management systems configured to respond to the communication elapsed time required until the previous data reception in addition to the reception radio wave intensity when the transmission radio wave intensity setting is created.
- the vehicle-side module generates at least one of the received radio wave intensity and the communication elapsed time when creating the transmission radio wave intensity setting value. Dividing into multiple groups according to those levels, adding or subtracting the difference set in advance for each group to the previous transmission radio field strength setting value to the sensor module, and transmitting to the next sensor module.
- This is a tire information management system configured to have a radio field strength setting value.
- the vehicle-side module determines the transmission radio wave intensity to be employed for the next data transmission of the sensor module according to the reception radio wave intensity of the data signal transmitted from the sensor module last time. A set value is created, and this transmission radio field strength setting value is added to the next command to the sensor module. The sensor module controls the transmission radio field strength at the next data transmission based on this setting value. If the received signal strength is high, the transmitted signal strength of the next sensor module is reduced within the range that does not interfere with data transmission, assuming that the transmitted signal strength of the previous sensor module data transmission is sufficient. This can reduce power consumption and extend battery life.
- the vehicle-side module responds to the elapsed communication time required until the previous data reception in addition to the received radio wave intensity when creating the transmission radio wave intensity setting value. Even if the communication elapsed time in the previous data reception is short, it is assumed that there is a margin in the transmission radio wave intensity in the previous sensor module data transmission, and the next sensor module transmission radio wave is within the range that does not hinder the data transmission. The strength can be reduced, which can further reduce power consumption and extend battery life.
- the vehicle-side module when generating the transmission radio wave intensity setting value, classifies at least one of the reception radio wave intensity and the communication elapsed time into a plurality of groups according to their levels. This is the same as the value set for the transmitted signal strength to the previous sensor module. The difference set in advance for each group is added or subtracted to obtain the setting value for the transmission radio field strength to the next sensor module. Therefore, the transmission radio field strength effective for reducing the power consumption of the sensor module is extremely high.
- the tire information management system can be configured simply by calculating with a simple calculation.
- FIG. 1 is a configuration diagram showing a configuration of a tire information management system according to an embodiment of the present invention.
- the tire information management system 10 includes a plurality of sensor modules 3 mounted in each tire 4 of a vehicle 6. (6 in the case of illustration) and antenna 2 (4 in the case of illustration) that receives data including data related to tire condition such as tire pressure and tire temperature transmitted via antenna 8 of sensor module 3 ), And a vehicle body side module 5 that acquires data from the sensor module 3 and is connected to the antenna 2.
- the vehicle body side module 5 may transmit / receive information on the tire to / from the vehicle operation management center 7 that monitors the usage status of the tire.
- Transmission / reception between the vehicle body side module 5 and the sensor module 3 until the vehicle body side module 5 acquires data on the tire state quantity is performed as follows. That is, first, a command for requesting transmission of data relating to the measured tire state quantity is sent from one of the vehicle body module 5 to one of the sensor modules 3, for example, the sensor module 3A via the antenna 2 (2A). The sensor module 3A that has transmitted and received this command signal transmits a signal including measurement data to the vehicle body side module 5 via the antenna 8 attached thereto, and the vehicle body side module 5 receives this data. The transmission / reception with the sensor module 3A is completed, and then transmission / reception with respect to the next sensor module 3 (for example, 3B) is started via the antenna 2 (2B).
- a command for requesting transmission of data relating to the measured tire state quantity is sent from one of the vehicle body module 5 to one of the sensor modules 3, for example, the sensor module 3A via the antenna 2 (2A).
- the sensor module 3A that has transmitted and received this command signal transmits a signal including
- the vehicle body side module 5 performs the same transmission / reception with respect to all the sensor modules 3 attached to the tires 4 of the vehicle 6, and confirms reception of data from all the sensor modules 3.
- the period for performing this one-round operation can be determined as appropriate.
- the antenna 2 interposed with respect to a certain sensor module 3 is connected to the sensor module 3. It is preferable to select the antenna 2 that can establish communication with the highest probability for the control module 3. Force S using antenna 2 selected only by taking into account only If the probability of communication establishment is low, communication is established through the other antenna 2 to establish the most communication establishment for this sensor module. You can select antenna 2 with a high probability
- the vehicle body side module 5 cannot establish communication with the target sensor module 3 through any antenna 2 with a sufficient probability, it is determined that communication is not established. It is preferable to send this warning to the driver or the vehicle operation management center.
- FIG. 2 is a block fountain diagram showing the configuration of the sensor module 3.
- the sensor module 3 receives a command from the sensor unit 21 for measuring the tire state quantity including the tire internal pressure and the vehicle body side module 5.
- the transmitter / receiver IC 22 for transmitting measurement data from the sensor unit 21, the antenna 8 connected to the transmitter / receiver IC 22, the storage means 23 such as RAM for temporarily storing various setting parameters, and the operation of the entire sensor module 3
- a CPU 25 that controls each element in the sensor module 3, the transmission / reception IC 22, the storage means 23, and the like based on this program.
- FIG. 3 is a flowchart showing a processing procedure when the vehicle body side module 5 performs transmission / reception with one sensor module 3
- FIG. 4 is a flowchart showing a processing procedure of the sensor module 3.
- the vehicle body side module 5 first sends a command (command) requesting transmission of data relating to the measured tire condition quantity to a certain sensor module 3 (step sa-1). Then, a process of receiving data transmitted from the sensor module 3 is performed (step sa-2). As a result of this processing, it is determined whether or not the data reception is successful (step sa-3). If the data reception is successful, the communication processing with the sensor module 3 is terminated.
- step sa-3 if the reception is unsuccessful in step sa-3, the above steps sa-1 to sa-3 are repeated, but this cannot be repeated indefinitely.
- the upper limit of the communication time is set.
- step sa-4 it is determined whether the communication time with sensor module 3 has exceeded this upper limit. If not, step sa-; ! ⁇ Sa—Repeat the process of 3.
- Step sa-7 Retry communication with sensor module 3 using another antenna 2.
- Step sa-7 it is necessary to terminate the communication because there is no way to communicate with the target sensor module 3, and prior to step sa-7, the communication time has exceeded the upper limit for all antennas. (Step sa—5), and if so, set an alarm flag indicating that the communication was unsuccessful for use in the subsequent response (step sa—6), End communication with sensor module 3.
- step sb-1 the processing procedure of the sensor module 3 first performs various initial settings in step sb-1, as shown in the flowchart of FIG. After that, it is determined whether or not the time determined by a predetermined search cycle has been reached (step sb-2). When the time is reached, a radio wave search is performed (step sb-3), and the vehicle side mode is determined. Judgment 5 sends a command to send data and determines whether it is! / Or not (step sb-4).
- Step sb-5 When a command is transmitted from the vehicle body side module 5! /, The command is received! /, (Step sb-5). As a result, the command has been successfully decoded and the command If the collation result between the ID included in the ID and its own ID is OK (step sb-6), the measurement data is transmitted according to the command (step sb-7).
- step sb-8 it is determined whether or not a time determined by a predetermined measurement cycle set in advance has been reached (step sb-8), and when that time has been reached, a predetermined pressure such as tire internal pressure or temperature is determined.
- Measure tire condition step sb-9
- step sb-11 if it is determined that an abnormal value is included, it is assumed that an emergency situation has occurred.
- Step to send to module 5 step sb—12). If it is determined in step sb-11 that no abnormal value is included, the process returns to step sb-2 and waits until a time determined by a predetermined search cycle.
- the vehicle body side module 5 has received radio wave intensity measuring means 11 for measuring the intensity of the received radio wave when receiving data from each sensor module 3.
- the received radio wave intensity measuring means 12 can be constituted by, for example, a circuit generally called an RSSI (Received Signal Strength Indicator) circuit.
- the vehicle body side module 5 preferably has a command to start sending a command to the sensor module 3 in step sa-l in addition to the received radio wave intensity measuring means 12. ⁇
- a communication elapsed time measuring means 14 for measuring the time from IJ (step sa-l) to successful data reception from the sensor module 3 in step sa-3 is provided.
- the sensor module 3 is provided with transmission radio field intensity control means 16 for controlling the transmission radio field intensity used for data transmission to the vehicle body side module 5 in step sb-7 shown in FIG.
- the transmission radio wave intensity control means 16 includes a transmission / reception IC 22 that controls the transmission radio wave intensity at the time of transmission, a CPU 25 that outputs a set value of the transmission radio wave intensity to the transmission / reception IC 22, and a program that is operated by the CPU 25.
- the present invention uses the transmission radio field intensity control means 16 in the sensor module 3 to suppress the transmission radio field intensity when transmitting data within a range that does not hinder data transmission.
- Fig. 5 shows the relationship between the transmitted radio wave intensity and the current consumption proportional to the power consumption for the sensor module 3 attached to the tire. Is a graph with the transmission radio wave intensity (dBm) on the horizontal axis and the current consumption (mA) on the vertical axis. As is clear from the figure, if the transmission radio wave intensity is lowered, the power consumption is reduced. Can be reduced.
- the present invention measures the received radio wave intensity when the vehicle body side module 5 performs data reception, so that the measured value settles to a predetermined value. This is to allow the transmission radio field strength control means 16 of the submodule 3 to control the transmission radio field intensity, thereby ensuring communication stability and power consumption according to the ambient radio wave environment. Can be reduced.
- the transmission radio wave intensity control means 16 controls (sets) the level of the transmission radio wave intensity to a plurality of levels, for example, the number of levels is five, and each of these levels is set from the lowest.
- P P or less
- control is performed as follows.
- the vehicle body side module 5 sets the transmission radio wave intensity setting indicating the transmission radio wave intensity to be used for the next data transmission of the sensor module 3 in the command (command) to the sensor module 3 in step sa-l. Add value and send.
- Fig. 6 is a schematic diagram showing an example of the data structure to be transmitted in this command transmission. When this data has 12 bytes of data amount, the first byte, the second byte, ... from the top This transmission field strength setting value is assigned to the 4th bit position in the latter half of the 7th byte.
- a preamble and a postamble indicating the start and end of the data are arranged at the beginning and the end of the data, respectively, and the I byte of the sensor module 3 as the communication partner is arranged in the fourth byte.
- the 6th byte is command information to the sensor module 3, and the first 4 bits of the 7th byte are assigned the transmission channel information that the sensor module 3 should use for data transmission.
- the transmission radio wave intensity P in the transmission radio wave intensity setting is equal to the unit of the transmission radio wave intensity P in the transmission radio wave intensity setting value used in the previous command to the sensor module 3, as shown in Equation (1).
- Multiply positive and negative integers including zero by increasing radio field strength p The received radio wave intensity measured when the data was received from the sensor module 3 the previous time, with the correction parameter X being the integer when the unit radio wave intensity increment p is multiplied. If the received signal strength level R is almost as intended, the correction parameter X is set to zero.If the received signal strength level R is greater than the target, the correction parameter X is negative. On the other hand, when the value is small, the correction parameter X is set to be positive, so that the transmission radio wave intensity P when the sensor module 3 transmits data next time can be corrected to the optimum value.
- FIG. 7 is a graph illustrating the relationship between the received radio wave strength level R and the correction parameter X in the previous data reception.
- the received radio wave strength level R is set according to the level.
- the group is divided into two groups Rl, R2, R3, R4, and R5.
- -2 is used as the correction parameter X
- the next higher level group R4 is used.
- the correction parameter X is set to ⁇ 1, and group R3 at the target received signal strength level is set to 0 as the correction parameter X.
- the correction parameter X is selected in accordance with the communication elapsed time T in the previous data reception in addition to the reception radio wave intensity level R in the previous data reception.
- Fig. 8 is a graph showing an example of the relationship between the communication elapsed time T and the correction parameter X in the previous data reception.
- the communication elapsed time T is set to five levels depending on the level.
- Group T1, ⁇ 2, ⁇ 3, ⁇ 4, and ⁇ 5 the value to be added to or subtracted from the correction parameter X determined according to the received signal strength level R is zero ( In other words, for the other groups, +1 is added to the value of the correction parameter X determined in accordance with the received radio wave strength level R, and a new correction parameter X is obtained.
- the sensor module 3 is made to increase the transmission radio wave intensity in the next transmission. In such a way, it is necessary to control.
- the transmission radio wave intensity when the sensor module 3 transmits data depends on the received radio wave intensity R when the vehicle body side module 5 receives data, or this
- it can be modified and set according to the communication elapsed time ⁇ , and as a result, power consumption can be reduced without impeding communication between the sensor module 3 and the vehicle body module 5. Battery life can be extended.
- FIG. 1 is a configuration diagram showing a tire information management system according to an embodiment of the present invention.
- FIG. 2 is a block diagram showing a configuration of a sensor module.
- FIG. 3 is a flowchart showing a processing routine of a vehicle body side module.
- FIG. 4 is a flowchart showing a processing routine of the sensor module.
- FIG. 6 is a schematic diagram showing the structure of command data transmitted from the vehicle body module to the sensor module.
- FIG. 7 is a graph showing the relationship between the received radio wave intensity at the time of the previous data reception and the correction parameter in the vehicle body side module.
- FIG. 8 is a graph showing the relationship between the communication elapsed time at the previous data reception and the correction parameter in the vehicle body side module.
- Vehicle operation management center Sensor module antenna Tire information management system Received radio wave intensity measuring means Communication elapsed time measuring means Transmitting radio wave intensity control means Sensor section
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Measuring Fluid Pressure (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2007305605A AU2007305605B2 (en) | 2006-10-04 | 2007-10-02 | Tire information management system |
US12/444,291 US8115614B2 (en) | 2006-10-04 | 2007-10-02 | Tire information management system |
CA2665688A CA2665688C (en) | 2006-10-04 | 2007-10-02 | Tire information management system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006273047A JP5019839B2 (ja) | 2006-10-04 | 2006-10-04 | タイヤ情報管理システム |
JP2006-273047 | 2006-10-04 |
Publications (1)
Publication Number | Publication Date |
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WO2008044540A1 true WO2008044540A1 (fr) | 2008-04-17 |
Family
ID=39282749
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/069264 WO2008044540A1 (fr) | 2006-10-04 | 2007-10-02 | Système de gestion d'informations de pneu |
Country Status (5)
Country | Link |
---|---|
US (1) | US8115614B2 (ja) |
JP (1) | JP5019839B2 (ja) |
AU (1) | AU2007305605B2 (ja) |
CA (1) | CA2665688C (ja) |
WO (1) | WO2008044540A1 (ja) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5540426B2 (ja) | 2009-06-26 | 2014-07-02 | 横浜ゴム株式会社 | タイヤ状態監視システム |
US20110067059A1 (en) * | 2009-09-15 | 2011-03-17 | At&T Intellectual Property I, L.P. | Media control |
KR101365925B1 (ko) * | 2010-05-13 | 2014-02-25 | 주식회사 만도 | 타이어 압력 센서모듈 식별장치 |
DE102011081947A1 (de) * | 2011-09-01 | 2013-03-07 | Robert Bosch Gmbh | Sensoranordnung für ein Fahrzeug und Betriebsverfahren für eine Sensoranordnung in einem Fahrzeug |
TWI608946B (zh) * | 2015-10-15 | 2017-12-21 | 箏風工程有限公司 | 輪胎運動參數偵測系統 |
KR101953565B1 (ko) * | 2016-11-02 | 2019-03-04 | 현대자동차주식회사 | 타이어 압력 모니터링 시스템 및 그의 구동 방법 |
DE102016225496A1 (de) | 2016-12-19 | 2018-06-21 | Continental Automotive Gmbh | Elektronische Radeinheit und Steuereinrichtung für ein Radüberwachungssystem eines Fahrzeuges, Radüberwachungssystem für ein Fahrzeug sowie Verfahren zur Radüberwachung in einem Fahrzeug |
TWI799114B (zh) * | 2022-01-27 | 2023-04-11 | 系統電子工業股份有限公司 | 具動態節能機制之胎壓偵測裝置以及節能方法 |
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- 2007-10-02 AU AU2007305605A patent/AU2007305605B2/en not_active Ceased
- 2007-10-02 CA CA2665688A patent/CA2665688C/en not_active Expired - Fee Related
- 2007-10-02 US US12/444,291 patent/US8115614B2/en not_active Expired - Fee Related
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JP2004145474A (ja) * | 2002-10-22 | 2004-05-20 | Yokohama Rubber Co Ltd:The | タイヤモニタリングシステム並びにそのモニタ受信機とモニタ装置及びセンサ装置 |
JP2004291768A (ja) * | 2003-03-26 | 2004-10-21 | Toyota Motor Corp | タイヤ状態量検出システム |
JP2004314771A (ja) * | 2003-04-16 | 2004-11-11 | Toyota Motor Corp | 車両用通信システム |
JP2005119370A (ja) * | 2003-10-14 | 2005-05-12 | Pacific Ind Co Ltd | タイヤ状態監視装置の送信機 |
JP2005178635A (ja) * | 2003-12-19 | 2005-07-07 | Tokai Rika Co Ltd | 車両制御装置 |
JP2006062533A (ja) * | 2004-08-27 | 2006-03-09 | Denso Corp | タイヤ状態監視システム |
JP2006174154A (ja) * | 2004-12-16 | 2006-06-29 | Omron Corp | 送信機 |
Also Published As
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US20100033316A1 (en) | 2010-02-11 |
JP2008087704A (ja) | 2008-04-17 |
US8115614B2 (en) | 2012-02-14 |
CA2665688C (en) | 2014-04-15 |
CA2665688A1 (en) | 2008-04-17 |
AU2007305605B2 (en) | 2010-09-16 |
JP5019839B2 (ja) | 2012-09-05 |
AU2007305605A1 (en) | 2008-04-17 |
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