WO2004067300A1 - タイヤ情報管理システム - Google Patents
タイヤ情報管理システム Download PDFInfo
- Publication number
- WO2004067300A1 WO2004067300A1 PCT/JP2004/000407 JP2004000407W WO2004067300A1 WO 2004067300 A1 WO2004067300 A1 WO 2004067300A1 JP 2004000407 W JP2004000407 W JP 2004000407W WO 2004067300 A1 WO2004067300 A1 WO 2004067300A1
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- WO
- WIPO (PCT)
- Prior art keywords
- sensor module
- module
- antenna
- tire
- sensor
- Prior art date
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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
- B60C23/0415—Automatically identifying wheel mounted units, e.g. after replacement or exchange of wheels
- B60C23/0416—Automatically identifying wheel mounted units, e.g. after replacement or exchange of wheels allocating a corresponding wheel position on vehicle, e.g. front/left or rear/right
-
- 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
- B60C23/005—Devices specially adapted for special wheel arrangements
- B60C23/007—Devices specially adapted for special wheel arrangements having multiple wheels arranged side by side
-
- 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
- B60C23/0437—Means for detecting electromagnetic field changes not being part of the signal transmission per se, e.g. strength, direction, propagation or masking
-
- 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
- B60C23/044—Near field triggers, e.g. magnets or triggers with 125 KHz
-
- 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
- B60C23/0444—Antenna structures, control or arrangements thereof, e.g. for directional antennas, diversity antenna, antenna multiplexing or antennas integrated in fenders
-
- 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
- B60C23/045—Means for detecting electromagnetic field changes being not part of the signal transmission per se, e.g. strength, direction, propagation or masking
Definitions
- the present invention relates to a plurality of sensor modules mounted in a tire and detecting data related to the tire such as a tire internal pressure, a receiving module receiving signals including the data from the sensor modules, and a receiving module.
- the present invention relates to an improvement of a tire information management system including a central control module for acquiring data from a computer.
- a sensor module that measures the temperature and pressure of the tire is mounted on the inner surface of the tire, and radio signals including measurement data transmitted from this sensor module are transmitted. Received by the receiving module, this signal is transmitted to the vehicle operation control center that manages multiple vehicles, and if there is a dangerous situation that may cause a breakdown, tire information management that instructs the driver to take appropriate action A system has been proposed.
- a receiving module corresponding to each sensor module mounted in each tire is mounted on the vehicle, and the signals processed by the receiving module are temporarily controlled by wiring in the central control of the vehicle. It is collected by the module and transmitted from this central control module to the vehicle management center by radio waves.
- the present invention has been made in view of such a problem, and has been developed in consideration of the problems described above. Communication can be maintained in the event of a failure, and the central control module can be used in common regardless of the number of receiving modules. It is an object of the present invention to provide a tire information management system capable of reducing the task of associating a sensor module with a tire. Disclosure of the invention
- the present invention has been made, and its gist configuration and operation and effect will be described below.
- a plurality of sensor modules mounted in a tire at least one receiving module for receiving data from these sensor modules, and a receiving module for acquiring data from the sensor module.
- the tire information management system comprising:
- connection ports for receiving modules, wherein the central control module is previously associated with each sensor module;
- a command to acquire data overnight from the sensor module is output to the connection port corresponding to each sensor module in order, and data is input from the sensor module according to the command.
- this connection port is associated with the sensor module in the next sampling, and if there is no data input from the sensor module even if a command is issued, acquisition of data from this sensor module is performed by another connection.
- the central control module sequentially issues a command for acquiring data from the sensor module at a predetermined sampling time and a predetermined number of connection ports for the receiving module, which are previously associated with the respective sensor modules. , Each If the data is output to the connection port corresponding to the sensor module and data is input from the sensor module in response to the command, this connection port is associated with that sensor module in the next sampling, and even if a command is issued If no data is input from the sensor module, control means for allocating data acquisition from the sensor module to another connection port and associating the other connection port with the sensor module in the next sampling. Because of the above, even if the receiving modules are not connected to all of the connection ports, the central control module can be shared regardless of the number of receiving modules. Also, if the receiving module fails while the system is operating, the sensor module data acquisition can be assigned to the next receiving module, and the failure of the receiving module can be dealt with.
- the present invention is the evening information management system that outputs a failure signal of the tire information management system when no response is received from the sensor module in any of the connection ports in (1).
- the sensor module corresponding to the connection port that issued the first command is faulty, so that the sensor module can be faulty. Can also be addressed. And that can be known by the failure signal.
- the present invention is the tire information management system according to (1) or (2), wherein the sensor module has a means for detecting a tire internal pressure. According to the present invention, information on the internal pressure of each tire can be obtained.
- the present invention is the tire information management system according to any one of (1) to (3), wherein the sensor module has means for detecting a temperature in the tire.
- the present invention relates to a sensor module mounted in each tire, a receiving module for receiving data from these sensor modules, and a central module for instructing the receiving module to acquire data from the sensor module.
- a tire information management system including a control module,
- the receiving module is arranged near one of the tires and has a plurality of antennas for transmitting and receiving signals to and from the sensor module, a receiving main body connected to these antennas by wiring, and a receiving main body. It consists of antenna switching means for connecting and disconnecting the electrical connection between each antenna.
- the receiving main unit modulates a command signal from the central control module to generate an output signal to the antenna, and demodulates a signal from the antenna to output data to the central control module. It is a management system.
- the receiving main body since only the antenna that performs the function of transmitting and receiving to and from the sensor module is arranged near the sensor module, the receiving main body is arranged in a place where it will not be damaged by incoming rocks or the like. Alternatively, it can be covered with a metal case or the like, and the parts that may be damaged by flying rocks or the like can be limited to only the antenna, and the damage at that time can be suppressed to a minimum.
- a function of generating output signals to the antenna and decoding the signal from the antenna which is conventionally performed by a plurality of receiving modules, is provided in one receiving main body.
- the cost for the receiving module can be reduced.
- the antenna switching means for connecting and disconnecting the connection between the receiving main unit and the respective antennas has a switching function performed by the central control module for each receiving module in the conventional system. It is responsible.
- the present invention is the tire information management system according to (5), further comprising an amplifier for amplifying the transmission / reception signal near each antenna.
- amplifiers for amplifying transmission and reception signals near respective antennas Therefore, the loss between the receiving main body and each antenna can be covered.
- a corresponding antenna is determined in advance for each sensor module
- the central control module outputs, at a predetermined sampling time, data acquisition commands from the sensor modules to the antennas corresponding to the respective sensor modules in order, and inputs data from the sensor modules according to the commands. If so, this antenna is associated with that sensor module in the next sampling, and if there is no data input from the sensor module even if a command is issued, data acquisition from this sensor module will be
- This is a tire information management system that performs a process of allocating the antenna to one of the antenna modules and performing a process of associating the other antenna with the sensor module in the next sampling.
- the central control module can be shared irrespective of the number of antennas, regardless of which sensor module is associated with any antenna. Also, if an antenna fails during operation of the system, data acquisition of the sensor module can be assigned to the next antenna, and such a failure can be dealt with.
- the present invention is the tire information management system according to (7), which outputs a failure signal of the tire information management system when no response is received from the sensor module in any of the antennas.
- the sensor module corresponding to the connection port that has issued the first command is faulty, thereby coping with the sensor module fault. can do. And that can be known by the failure signal.
- the present invention provides a plurality of sensor modules mounted in each tire for detecting an internal pressure of the tire, an antenna arranged near one of the tires for transmitting and receiving signals to and from the sensor module, The transmitted signal from each antenna and And a central control module for controlling the transmission timing thereof.
- the sensor module comprises a received signal strength measuring means for measuring the strength of the received signal
- the central control module includes: a reception signal strength acquisition control means for measuring a reception signal strength for a signal transmitted from each antenna and transmitting a measurement result to all sensor modules attached to the vehicle; A tire information management system comprising sensor module position specifying means for specifying a mounting position of a tire to which each sensor module is attached, based on received signal strength measurement data from the sensor module.
- the sensor module located closest to the antenna generally has the highest received signal strength.
- the central control module includes the reception signal strength acquisition control means and the sensor module position identification means as described above, and it is known which tire is located close to which tire.
- the sensor module that exhibits the highest received signal strength for each antenna can be determined to be the one that is mounted on the tire closest to this antenna.
- the present invention provides the tire information management system according to (9), wherein the antennas have a high directivity, and each antenna is mounted in a posture exhibiting high directivity in the direction of the corresponding tire. is there.
- each antenna is mounted in a posture that shows high directivity in the direction of the corresponding tire, the reception intensity of the sensor module arranged corresponding to this antenna is set to the other sensor module. Signal strength can be made more remarkably high, and the position of the sensor module can be more reliably specified.
- the reception signal strength acquisition control means and the sensor module position identification means execute the respective execution processes at a timing when the engine of the vehicle is started. It is a tyre information management system that works together.
- the timing of the execution processing of the reception signal strength acquisition control means and the sensor module mounting position specifying means is synchronized with the start of the engine. Therefore, after the engine is stopped and tire replacement or tire rotation is performed. The correspondence between the new sensor module and the tire can be reflected in running immediately after work such as tire replacement.
- FIG. 1 is a flowchart for explaining an example of an algorithm of the tire information management system according to the first embodiment of the present invention.
- FIG. 2 is a block diagram illustrating an example of the tire information management system according to the first embodiment.
- FIG. 3 is a flowchart showing an example of control in the tire information management system shown in FIG.
- FIG. 4 is a flowchart showing another example of control in the tire information management system shown in FIG.
- FIG. 5 is a system configuration diagram illustrating a tire information management system according to a second embodiment of the present invention.
- FIG. 6 is a flowchart for explaining an example of an algorithm of the tire information management system according to the second embodiment.
- FIG. 7 is a flowchart showing a processing routine of the reception signal strength acquisition control means.
- FIG. 1 is a flowchart for explaining an example of an algorithm of the tire information management system according to the first embodiment.
- CM is the central control module
- SM (i) is the sensor module
- RM (i, k) is the reception module associated with the sensor module SM (i) with the k-th priority.
- CP (i, k) indicates the connection port for the receiving module RM (i, k)
- ⁇ 1 ⁇ ( ⁇ indicates the sensor module mounted on each tire.
- k l '' '' M (M is the number of receiving modules).
- RM (1, 1) is instructed to acquire data from SM (1, 1) via CP (1, 1) (step 1).
- the data can have a configuration in which the ID of the sensor module and the data of pressure and temperature are arranged in a predetermined order.
- the CM sends the data from the SM (1) to the vehicle operation management center (step 3). Then repeat the same operation.
- the CM has not succeeded in acquiring the data within the predetermined time, it is determined that the RM (1, 1) is not connected or has failed, and the next time the CP (1, 1) is acquired for the next time (Step 4).
- RM (1, 1) not connected
- the CM sends the data to the RM (1, 2) via the next priority CP (1, 2) to the RM (1, 2).
- Command acquisition Step 5
- SM (1) cannot be acquired even with RM (1, M)
- a failure signal of the tire information management system is output (step 6).
- connection port CP (i, k 1) (k 1 is the priority corresponding to the receiving module that was able to establish communication first) corresponding to the sensor module SM (i) of
- the data transmitted from the sensor module to the receiving module is received in order, and if there is no response from the receiving module, the connection port with the next priority is associated with the connection port with no response from the receiving module.
- a command to acquire data to the sensor module of the tire is issued, and the data from the sensor module of the tire corresponding to the receiving module that does not respond can be obtained.
- the connection port to which the reception module is connected in this system Due to the first data acquisition operation from SM (1) to SM (N), regardless of the connection status between the receiving module and the connection port, the connection port to which the reception module is connected in this system.
- the receiving module can be automatically identified, and the receiving modules can be automatically assigned so that signals from all sensor modules can be received. Then, in the operations from SM (1) to SM (n) in the second and subsequent normal operations, if the receiving module cannot be recognized by the connection port that was able to recognize the receiving module for the first time, the receiving module A fault can be considered and another receiver module can be automatically assigned to receive a signal from that sensor module.
- FIG. 2 is a block diagram illustrating an example of the tire information management system according to the present embodiment.
- the tire information management system 20 includes a sensor module 13 (SM1 to SM6) mounted on each tire 14 of the vehicle 16 and a radio wave including temperature and pressure data from the sensor module 13.
- Receiving modules 11 (RM1 to RM4) that receive signals
- CM central control module 15
- the vehicle management center 17 monitors the running condition of the tires.
- the central control module 15 has four connection ports 12 (CP1 to CP4), and the reception modules 11 (RM1 to RM4) are connected to the connection port 12, respectively.
- RM1 of the receiving module 11 is associated with S Ml of the sensor module 13
- RM2 of the receiving module 11 is associated with SM2 of the sensor module 13
- RM3 of the receiving module 11 is associated with the sensor module. 13 are associated with SM 3 and SM 4
- RM 4 of the receiving module 11 is associated with SM 5 and SM 6 of the sensor module 13.
- FIG. 3 is a flowchart showing an example of control in the tire information management system 20 shown in FIG. Explaining the control flow according to Fig.
- a communication command with the SMI is issued to the RM1 via the CP1 (S1).
- RM1 communicates with SM1 and sends the data of SM1 to CM via CP1.
- a communication command with SM2 is issued to RM2 via CP2 under the control of CM (S2).
- RM2 communicates with SM2 and sends the data of SM2 to CM via CP2.
- a communication command with SM3 and SM4 is issued to RM3 via CP3 (S3).
- RM3 communicates with SM3 and SM4, and sends the data of SM3 and SM4 to the CM via CP3.
- a communication command with SM 5 and SM 6 is issued to RM 4 via CP 4 (S4).
- RM4 executes communication with SM5 and SM6, and sends data of SM5 and SM6 to the CM via CP4.
- the CM manages the data of SM1 to SM6 (S5).
- FIG. 4 is a flowchart showing another example of control in the tire information management system 20 shown in FIG.
- the example shown in FIG. 4 is a control flowchart when the RM 1 has failed or has failed halfway.
- a communication command with the SMI is issued to the RM1 via the CP1 (S1).
- the SM1 data is not sent to the CM even after the time limit expires, indicating that the RM1 has failed.
- a command to communicate with SM1 is issued to RM2 via CP2 under the control of CM to acquire the data of SM1 (S2).
- RM2 executes communication with SM1 (assuming that data could be obtained within the time limit), and sends the data of SM1 to the CM via CP2.
- the data acquisition of SM1 is assigned so that the data acquisition command is not issued to CP1 but the data acquisition command is issued to RM2 via CP2. If SM1 data cannot be acquired even with CP2, SM1 data acquisition commands are issued to CP3 and CP4 sequentially, and if all data acquisition commands are not satisfied, SM1 is determined to be faulty. And take countermeasures.
- a communication command with the SM 2 is issued to the RM 2 via the CP 2 (S3).
- RM2 communicates with SM2 and sends the data of SM2 to CM via CP2.
- a communication command with SM3 and SM4 is issued to RM3 via CP3 under the control of CM (S4).
- RM3 communicates with SM3 and SM4, and sends the data of SM3 and SM4 to the CM via CP3.
- a communication command with SM5 and SM6 is issued to RM4 via CP4 (S5).
- RM4 executes communication with SM5 and SM6, and sends the data of SM5 and SM6 to the CM via CP4.
- the CM manages the data of S Ml to SM 6 (S 6).
- data can be transmitted overnight to a plurality of sensor modules by one receiving module, and the tire information management system can be simply designed.
- FIG. 5 is a system configuration diagram showing the tire information management system of this embodiment.
- the tire information management system 10 is provided in the vehicle V, and has a sensor module 3 mounted in each car T, a receiving module 1 for receiving data from these sensor modules 3, and a receiving module.
- 1 includes a central control module 5 for instructing acquisition of data from the sensor module 3;
- a receiving module 1 includes a plurality of antennas 6 arranged near the tire T for transmitting and receiving signals to and from the sensor module 3;
- the command signal from the central control module 5 is modulated to generate an output signal to the antenna 6, and the signal from the antenna 6 is decoded to —Provide control means to output data to rule 5.
- the antenna switching means 8 includes a wiring relay, Alternatively, it can be configured by a semiconductor switch or the like, but it may be configured by providing a port that is always connected to each antenna 6 as hardware in the reception main unit 7 and opening and closing each port by software. .
- the central control module 5 performs a process of acquiring, from the sensor modules 3, the tire data such as the tire internal pressure on the tire T to which the sensor module 3 is attached at regular intervals.
- the operation of this round of processing routine is as follows. First, the central control module 5 outputs, to the receiving main unit 7, an ID of the first sensor module 3a and a signal for instructing data acquisition from this module 3a.
- the receiving main unit 7 outputs a modulated signal obtained by modulating this signal to the antenna 6a.Before this output, the receiving main unit 7 or the central control module 5 determines that the antenna switching means 8 Control is performed so that antenna 6a is selected.
- the modulated signal from the receiving main unit 7 is transmitted from the first antenna 6a, but at least the first sensor module 3a is located near the first antenna 6a Therefore, this signal can be received, and the first sensor module 3a compares the data transmission command with the transmitted ID, and transmits the data on the tire Ta. This signal can be received at least by the first antenna 6a. At this time, since the antenna switching means 8 is in the state of selecting the first antenna 6a, the receiving main unit 7 receives this signal. can do. The receiving main unit 7 that has received this signal extracts tire-related data by demodulation processing and outputs this data to the central control module 5.
- the same processing as that performed on the first sensor module 3a is sequentially performed on the second to fourth sensor modules 3 to complete a single processing routine.
- the data collected by the central control module 5 is sent to an overall control device (not shown) mounted on the vehicle, which also monitors the status of other components other than the tires, as necessary. Manages multiple vehicles at predetermined timing To the vehicle operation management center.
- each sensor module 3 is provided with a corresponding antenna 6 in advance,
- the central control module 5 sequentially outputs data acquisition commands from the sensor modules 3 to the antennas 6 corresponding to the respective sensor modules 3 at a predetermined sampling time, and outputs the commands from the sensor modules 3 according to the commands. If there is data input, this antenna 6 is associated with that sensor module 3 in the next sampling, and if there is no data input from sensor module 3 even if a command is issued, this sensor module 3 Is assigned to another antenna 6 and the other antenna 6 is associated with the sensor module 3 in the next sampling, and a flow chart for explaining an example of an algorithm for this processing is given. This will be described with reference to FIG. In Fig.
- CM is assigned to the central control module
- SM (i) is assigned to sensor module 3
- AN (i, k) is assigned to sensor module SM (i) with k-th priority.
- the CM succeeds in acquiring data within the specified time, the data from SM (1) is The CM sends it to the vehicle operation management center (step 3). Then repeat the same operation. On the other hand, if the CM does not succeed in data acquisition within the predetermined time, it is determined that AN (1, 1) has failed and data acquisition is not performed for AN (1, 1) from the next time. (Step 4). If AN (1, 1) is determined to be faulty, the CM instructs the next priority AN (1, 2) to retrieve data from SM (1), for which data could not be acquired (evening) ( Step 5). Finally, if the data of SM (1) could not be obtained even with AN (1, M), a failure signal of the tire information management system is output (step 6).
- the first data acquisition operation from SM (1) to SM (N) enables the system to automatically determine which antennas can function in this system, regardless of the state of the antenna. Antennas can be automatically assigned to receive signals from all sensor modules. Then, in the operations from SM (1) to SM (N) in the normal operation after the second time, if the antenna that has been recognized cannot be recognized for the first time, it is considered that the antenna has failed, and Antennas can be automatically assigned to receive signals from the sensor module.
- the central control module 5 measures the received signal strength of the signal transmitted from each antenna 6 for all the sensor modules 3 attached to the vehicle V. Based on the received signal strength acquisition control means for performing the measurement and the transmission of the measurement results, and the tire T on which each sensor module 3 is mounted, based on the received signal strength measurement data obtained by the received signal strength acquisition control means. And a sensor module position specifying means for specifying a mounting position of the CPU. These means are constituted by a CPU, a memory, a program stored in the memory, and the like.
- a processing routine of the above-mentioned received signal strength acquisition control means which starts processing based on an ignition signal of the engine, will be described based on a flowchart shown in FIG.
- each antenna 6 has an antenna number k in order from 1 to M
- there are N sensor modules 3 and each sensor module 3 has a sensor number i of 1 To N.
- R SSI (k, i) be the reception intensity when the sensor module of number i receives a signal of predetermined intensity transmitted from the antenna of number k.
- Each sensor module 3 includes a received signal strength measuring means for measuring the received signal strength.
- This processing routine first performs initialization processing S1, sets antenna number k and sensor number i to 1, and sets RSSI (k, i) to zero for all k and i. .
- process S2 a command to acquire the reception strength R SSI (1, 1) of the first sensor module for the first antenna is output to the reception main body 7.
- the receiving main unit 7 modulates this command and sets the antenna switching means 8 to a state of selecting the antenna 6 of the antenna number 1. Since the received intensity data and ID are received from the sensor module 3 of No. 1 and demodulated and output to the central control module 5, the central control module 5 that inputs the received RSSI (1, 1) Step S4 for saving is executed. However, prior to the process S4, the process S3 for determining whether there is an input from the receiving main unit 7 within a predetermined time is performed, and if there is no input, the RSSI (1, 1) is acquired again. Process S2 is retried. And If there is no input even after a predetermined number of retries, a signal indicating a failure can be output to the overall vehicle management system, and processing such as failure display can be performed.
- step S4 for storing the acquired RSSI (1, 1) the processing for antenna number 1 and sensor number 1 ends, and then, according to processing S5 and S6, the antenna number k is kept at 1 Then, the sensor number i is incremented by 1, and the same operation is performed for the next sensor module to obtain RSSI (1, 2).
- step S4 for storing the acquired RSSI (1, 1) the processing for antenna number 1 and sensor number 1 ends, and then, according to processing S5 and S6, the antenna number k is kept at 1 Then, the sensor number i is incremented by 1, and the same operation is performed for the next sensor module to obtain RSSI (1, 2).
- the received signal strength acquisition control means performs processing for obtaining RSSI (k, i) for all combinations of antenna numbers and sensor numbers, and ends.
- the sensor module position specifying means starts a process of associating the sensor module ID with the tire mounting position, and for each antenna number k, the RS SI (k, i) for each sensor module is determined.
- this association can be made more reliable.
- the present invention can be used as a tire information management system that manages tires of a running vehicle such as a construction vehicle.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002514038A CA2514038C (en) | 2003-01-29 | 2004-01-20 | Tire-information administration system |
JP2005504676A JP4480670B2 (ja) | 2003-01-29 | 2004-01-20 | タイヤ情報管理システム |
US10/542,765 US7411487B2 (en) | 2003-01-29 | 2004-01-20 | Tire-information administration system |
AU2004207085A AU2004207085B2 (en) | 2003-01-29 | 2004-01-20 | Tire-information administration system |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003020566 | 2003-01-29 | ||
JP2003-020566 | 2003-01-29 | ||
JP2003-166510 | 2003-06-11 | ||
JP2003166510 | 2003-06-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004067300A1 true WO2004067300A1 (ja) | 2004-08-12 |
Family
ID=32828901
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/000407 WO2004067300A1 (ja) | 2003-01-29 | 2004-01-20 | タイヤ情報管理システム |
Country Status (5)
Country | Link |
---|---|
US (1) | US7411487B2 (ja) |
JP (1) | JP4480670B2 (ja) |
AU (1) | AU2004207085B2 (ja) |
CA (1) | CA2514038C (ja) |
WO (1) | WO2004067300A1 (ja) |
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JP2006273020A (ja) * | 2005-03-28 | 2006-10-12 | Yokohama Rubber Co Ltd:The | タイヤ状態検出装置 |
JP2007017200A (ja) * | 2005-07-05 | 2007-01-25 | Beru Ag | タイヤのモニタリングシステム、特にタイヤ圧をモニタリングするシステムのトランスミッターを配置する方法と装置。 |
JP2007230416A (ja) * | 2006-03-02 | 2007-09-13 | Denso Corp | 車輪位置検出装置およびそれを備えたタイヤ空気圧検出装置 |
JP2008049875A (ja) * | 2006-08-25 | 2008-03-06 | Nec Electronics Corp | タイヤ空気圧モニター装置、及びタイヤ位置特定方法 |
JP2008074162A (ja) * | 2006-09-19 | 2008-04-03 | Denso Corp | 車輪位置検出装置およびそれを備えたタイヤ空気圧検出装置 |
JP2008149831A (ja) * | 2006-12-15 | 2008-07-03 | Denso Corp | 車輪位置検出装置およびそれを備えたタイヤ空気圧検出装置 |
JP2008149832A (ja) * | 2006-12-15 | 2008-07-03 | Denso Corp | 車輪位置検出装置、それを備えたタイヤ空気圧検出装置および送受信機 |
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- 2004-01-20 AU AU2004207085A patent/AU2004207085B2/en not_active Ceased
- 2004-01-20 WO PCT/JP2004/000407 patent/WO2004067300A1/ja active Application Filing
- 2004-01-20 CA CA002514038A patent/CA2514038C/en not_active Expired - Fee Related
- 2004-01-20 JP JP2005504676A patent/JP4480670B2/ja not_active Expired - Lifetime
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EP2433821A1 (en) * | 2005-03-10 | 2012-03-28 | Delphi Technologies, Inc. | Tire pressure monitor with diversity antenna system |
JP2006273020A (ja) * | 2005-03-28 | 2006-10-12 | Yokohama Rubber Co Ltd:The | タイヤ状態検出装置 |
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US7515040B2 (en) | 2005-07-06 | 2009-04-07 | Denso Corporation | Wheel identifying apparatus and tire inflation pressure detecting apparatus with function of wheel identification |
JP2007230416A (ja) * | 2006-03-02 | 2007-09-13 | Denso Corp | 車輪位置検出装置およびそれを備えたタイヤ空気圧検出装置 |
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JP2008149831A (ja) * | 2006-12-15 | 2008-07-03 | Denso Corp | 車輪位置検出装置およびそれを備えたタイヤ空気圧検出装置 |
JP2008155852A (ja) * | 2006-12-26 | 2008-07-10 | Denso Corp | 車輪位置検出装置、それを備えたタイヤ空気圧検出装置および送受信機 |
JP2008267899A (ja) * | 2007-04-18 | 2008-11-06 | Nippon Soken Inc | 車輪位置検出装置におけるトリガ機搭載構造 |
JP2008247388A (ja) * | 2008-07-03 | 2008-10-16 | Denso Corp | 車輪位置検出装置に用いられる受信機 |
JP4605262B2 (ja) * | 2008-07-03 | 2011-01-05 | 株式会社デンソー | 車輪位置検出装置に用いられる受信機 |
JP2012240637A (ja) * | 2011-05-24 | 2012-12-10 | Denso Corp | 車輪位置検出装置およびそれを備えたタイヤ空気圧検出装置 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2004067300A1 (ja) | 2006-05-18 |
CA2514038A1 (en) | 2004-08-12 |
JP4480670B2 (ja) | 2010-06-16 |
AU2004207085B2 (en) | 2007-11-22 |
US20060139157A1 (en) | 2006-06-29 |
AU2004207085A1 (en) | 2004-08-12 |
CA2514038C (en) | 2009-07-21 |
US7411487B2 (en) | 2008-08-12 |
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