JP2012148603A - Sensor unit registration system and sensor unit registration method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sensor unit registration system and a sensor unit registration method, capable of easily registering identification information by using an electronic key of a simple structure.SOLUTION: In the sensor unit registration system, a sensor unit 14 which is provided to each tire 13 and transmits a radio wave signal including air pressure information on the tire and its own specific identification information, is registered in a monitoring device 16 for monitoring air pressure of each tire 13 on the basis of the radio wave signal. Registration of the identification information to the monitoring device 16 is performed by using operation of the electronic key 45 by which radio communication with the monitoring device 16 is enabled and by which radio communication with the sensor unit 14 is disabled, in the sensor unit registration system.

Description

  The present invention relates to a system and method for registering a sensor unit of a tire pressure monitoring system.

  Conventionally, a tire pressure monitoring system for monitoring a tire pressure of a vehicle is known. The system includes a sensor unit with a wireless communication function provided in each tire of a vehicle. This sensor unit detects the air pressure of the tire and transmits a radio signal including the detected air pressure information and identification information unique to itself. This radio signal is received by a monitoring device provided in the main body of the vehicle. In the apparatus, the identification information of each sensor unit is registered in advance in a state in which it is associated with the mounting position (left front, left rear, right front, right rear) of each tire. Then, the device determines which of the tires the air pressure information included in the wireless signal is based on the identification information included in the received wireless signal, and determines the air pressure of each tire based on the air pressure information. Monitor for abnormalities. When it is determined that any one of the tires has an abnormal air pressure, the device warns that through a display device in the passenger compartment. The driver can recognize which of the tires is abnormal through the warning.

JP 2006-335276 A

The registration of the attachment position of each tire and the identification information (sensor unit) of each sensor unit is performed by, for example, a sensor unit registration system described in Patent Document 1.
In this sensor unit registration system, the attachment position of each tire and the identification information of the sensor unit corresponding to this are registered in the monitoring device through operation of an electronic key. That is, as shown in FIG. 5, in this sensor unit registration system, for example, in the vicinity of the tire on the right front of the vehicle, a predetermined operation is performed on the lock button 52 provided on the electronic key 50, thereby Is transmitted to the TPMS transmitter 60. Upon receiving this activation signal, the TPMS transmitter 60 wirelessly transmits an ID code unique to itself. The electronic key 50 receives the ID code from the TPMS transmitter 60 and temporarily stores it in the memory 51 in association with the position information of the tire (here, right front). By performing this in the vicinity of each tire, all the ID codes and the position information of the tires are temporarily stored in the memory 51 in association with each other.

  Next, the ID code associated with the position information is registered in the monitoring device 70. At this time, the ID code stored in the memory 51 is wirelessly transmitted by performing a predetermined operation on the unlock button 53 provided on the electronic key 50. The monitoring device 70 stores the ID code from the electronic key 50 in association with the tire position.

  However, the electronic key is required to be further simplified in structure, and further downsized in the case. In this regard, the sensor unit registration system of Patent Document 1 requires wireless communication between the electronic key 50 and the TPMS transmitter 60. For this reason, the electronic key 50 requires a configuration for activating the TPMS transmitter 60 and receiving the ID code, that is, the transmitter activation circuit 54. In this respect, there remains room for improvement. there were.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a sensor unit registration system and a sensor unit registration method capable of easily registering identification information using an electronic key with a simple structure. It is in.

  In order to solve the above-mentioned problems, the invention according to claim 1 is directed to a sensor unit that is provided in each tire and transmits a wireless signal including the air pressure information and identification information unique to itself. In the sensor unit registration system for registering in a vehicle-mounted device that monitors tire air pressure, the registration of the identification information to the vehicle-mounted device can be wirelessly communicated with the vehicle-mounted device, and wireless communication with the sensor unit is impossible. The gist of this is to use the electronic key operation.

  According to this configuration, it is possible to register the identification information in the in-vehicle device without performing wireless communication between the electronic key and the sensor unit. That is, since a configuration for wirelessly transmitting the identification information of the sensor unit to the electronic key is not necessary, it is possible to omit an activation circuit or the like that was conventionally necessary. Thereby, the structure of the electronic key can be simplified, and as a result, the case of the electronic key can be reduced in size.

  The invention according to claim 2 is characterized in that, in the sensor unit registration system according to claim 1, the electronic key is provided with at least two operation switches for operating the in-vehicle device through wireless communication.

According to this configuration, the sensor unit identification information can be registered in the in-vehicle device only by operating the two operation switches.
According to a third aspect of the present invention, in the sensor unit registration system according to the second aspect, the in-vehicle device determines whether the identification information from each of the sensor units is correct and whether the identification information is correct. A question from the in-vehicle device having a communication port capable of transmitting instruction information for selection through operation to the portable communication terminal via short-range wireless communication and received via the communication port The gist is to display.

  According to this configuration, when the vehicle and the mobile communication terminal perform short-range wireless communication, identification information and instruction information are displayed on the display provided in the mobile communication terminal. Thereby, the user can register along the instruction information while visually recognizing the identification information.

  According to a fourth aspect of the present invention, in the sensor unit registration system according to the third aspect, the in-vehicle device corresponds to the sensor unit in which the identification information to be registered is provided on a tire. The gist is to transmit the position selection information for selecting either to the portable communication terminal.

According to this configuration, the sensor unit identification information and position information can be registered in the in-vehicle device only by operating the electronic key.
According to a fifth aspect of the present invention, there is provided a sensor unit for transmitting a radio signal including air pressure information and identification information unique to the tire unit provided on each tire, and an on-vehicle device for monitoring the air pressure of each tire based on these radio signals. In the sensor unit registration method for registering to the vehicle unit, the registration of the identification information to the vehicle-mounted device uses an operation of an electronic key that allows wireless communication with the vehicle-mounted device and wireless communication with the sensor unit is disabled. It is a summary to do by doing.

  According to this registration method, the same operation and effect as in claim 1 can be obtained.

  The present invention can provide a sensor unit registration system and a sensor unit registration method capable of easily registering identification information using an electronic key with a simple structure.

The block diagram which shows schematic structure of the tire pressure monitoring system of 1st Embodiment. The list figure which shows the structure of the table data memorize | stored in the monitoring apparatus on the vehicle side. The flowchart which shows the procedure of the registration process of a sensor unit. (A) When registering identification information, (b) when registering position information (front wheel / rear wheel), (c) when registering position information (right side / left side) Front view. The block diagram which shows the tire pressure monitoring system of the conventional form.

(First embodiment)
Hereinafter, a first embodiment in which the present invention is embodied in a vehicle tire pressure monitoring system will be described with reference to FIGS. In this example, a so-called direct type (valve type) in which a sensor unit provided integrally with an air valve of the tire is incorporated in the tire and the tire air pressure information directly detected by the sensor unit is wirelessly transmitted to the vehicle body side. The system is adopted.

<System overview>
First, an overview of the tire pressure monitoring system will be described. As shown in FIG. 1, the tire pressure monitoring system 11 includes four sensor units 14 provided on four tires 13 of a vehicle 12 and a monitoring device 16 provided on a vehicle body 15 of the vehicle 12. Each sensor unit 14 detects the air pressure of the tire 13 corresponding to itself, and transmits a wireless signal including the detected air pressure information and identification information unique to itself at a predetermined period. The radio signal from each sensor unit 14 is received by the monitoring device 16. The monitoring device 16 determines which of the four tires 13 the air pressure information included in the wireless signal is based on the identification information included in the received wireless signal. The monitoring device 16 individually monitors the air pressure of the four tires 13 based on each air pressure information. If an abnormality is detected in the pressure of any of the tires, an abnormality is detected in a specific tire through a display device 17 provided in a range visible to the driver in the passenger compartment, such as an instrument panel (instrument panel). Warning that occurred. The instrument panel is provided with an infrared port 18. The monitoring device 16 can transmit and receive information through infrared communication via an infrared port 18 with a communication device having an infrared communication function, here, a mobile phone 40. The mobile phone 40 is set with a dedicated application for receiving information such as identification information through the infrared communication and displaying the information on the liquid crystal display 41.

  A body ECU 35 is provided in the vehicle 12 (more precisely, the vehicle body 15). The body ECU 35 switches the locking / unlocking of the locking / unlocking device as an in-vehicle device provided in the vehicle door through wireless communication with the electronic key 45 provided with the lock switch 46 and the unlock switch 47. Connected via communication line. Therefore, the electronic key 45 can communicate with the monitoring device 16 via the body ECU 35. Each time the specific information transmitted wirelessly is received via the body ECU 35 in accordance with the specific operation of the electronic key 45, the monitoring device 16 performs the normal mode for monitoring the air pressure of each tire 13 and the sensor unit 14. The operation mode is switched between a registration mode for registering identification information.

<Sensor unit>
The sensor unit 14 is integrally provided at the inner end of an air valve (not shown) of the tire 13. As shown in an enlarged view in the upper part of FIG. 1, the sensor unit 14 includes an acceleration sensor 21, an air pressure sensor 22, a transmitter 23, and a control circuit 24.

  The acceleration sensor 21 detects the acceleration accompanying the rotation of the tire 13. The air pressure sensor 22 measures the air pressure inside the tire 13 and generates air pressure information that is an electric signal corresponding to the measurement result. The transmitter 23 modulates the electrical signal generated in the control circuit 24 and wirelessly transmits the modulated electrical signal. The control circuit 24 comprehensively controls each part of the sensor unit 14. The storage device 25 of the control circuit 24 stores various control programs and identification information (ID code) unique to itself. The control circuit 24 generates an electrical signal including identification information unique to itself and air pressure information acquired through the air pressure sensor 22, and transmits this as a radio signal through the transmitter 23 at a predetermined control period.

  The sensor unit 14 uses a battery (not shown) as an operating power source. For this reason, in order to maintain the consumption of the battery and the life of the sensor unit 14 for a longer time, the sensor unit 14 is configured as follows. That is, the control circuit 24 stops the operation of the transmitter 23 when a change in acceleration through the acceleration sensor 21 is not detected for a predetermined time, such as when the vehicle is stopped. The control circuit 24 starts the operation of the transmitter 23 when a predetermined acceleration is detected through the acceleration sensor 21. Since the transmission of the radio signal through the transmitter 23 is stopped when the automobile is stopped, the battery power is saved accordingly.

<Monitoring device>
Next, the monitoring device 16 will be described in detail. As shown in FIG. 1, the monitoring device 16 includes a receiver 31 and a control device 32. The receiver 31 receives a radio signal from each sensor unit 14. The control device 32 performs overall control of the air pressure monitoring system. The control device 32 monitors the state of each tire 13 based on the radio signal received through the receiver 31.

  The storage device 33 of the control device 32 stores table data 34 shown in FIG. The table data 34 is information indicating a correspondence relationship between the mounting positions (right front, left front, right rear, and left rear) of the tires 13 and the identification information ID1 to ID4 of the sensor units 14. The identification information stored in the table data 34 is registered when the vehicle is shipped or when the tire 13 is replaced. The storage device 33 stores various control programs.

  The control device 32 determines which of the tires 13 the air pressure information included in the wireless signal is based on the comparison between the identification information included in the wireless signal received through the receiver 31 and the table data 34. . Moreover, the control apparatus 32 determines the presence or absence of abnormality of the air pressure of each tire 13 based on the said air pressure information. When an abnormality is detected in the air pressure of any one of the tires 13, the control device 32 generates a display control signal to warn to that effect. The display device 17 displays a warning that an abnormality has occurred in a specific tire in accordance with a display control signal generated by the control device 32.

<Sensor unit registration process>
Now, when the tire 13 is newly purchased, it is necessary to update the table data 34 shown in FIG. 2 according to the attachment position of the new sensor unit 14. The same applies to the case of tire rotation. In this example, the attachment position and identification information of the sensor unit 14 are registered as follows.

  Next, the registration process of the sensor unit 14 will be described with reference to the flowchart of FIG. The flowchart is executed according to a control program stored in the storage device 33 of the control device 32. The control program is executed when the lock switch 46 and the unlock switch 47 of the electronic key 45 are specially operated and the operation mode of the control device 32 is switched from the normal mode to the registration mode. At this time, the identification information stored in the table data 34 and the information required at the previous registration of the identification information are deleted. The special operation in this example is simultaneous pressing of the lock switch 46 and the unlock switch 47. Further, it is assumed that a dedicated application stored in the mobile phone 40 is activated, and the mobile phone 40 is in a state where it can communicate with the control device 32 through the infrared port 18.

  When the lock switch 46 and the unlock switch 47 of the electronic key 45 are simultaneously pressed and a wireless signal indicating that is input to the control device 32 via the body ECU 35, the control device 32 normally changes its operation mode. The mode is switched to the registration mode (step S1).

  Next, the control device 32 starts communication with the mobile phone 40 through the infrared port 18 (step S2). And the control apparatus 32 determines the order J of the identification information displayed on the liquid crystal display 41 of the mobile telephone 40 (step S3). Here, among the identification information sent from each sensor unit to the control device 32, the ID code of the sensor unit 14 of the vehicle 12 is likely to be the ID code, that is, it is received in order because it is frequently received. An order J (1, 2,...) Is assigned to all identification information.

  Next, the control device 32 increases the number of elapsed times N for determining the identification information to be displayed on the liquid crystal display 41 by 1 (step S4), and the order corresponding to the order J = the number of elapsed times N displayed on the liquid crystal display 41 is identified. An information registration screen A is displayed on the liquid crystal display 41 (step S5). As shown in FIG. 4A, in the registration screen A, is “ID“ ** 01 ”determined in step S4 a valve of this car? Is displayed. At the same time, the liquid crystal display 41 is set to YES, that is, when the displayed ID code is that of the valve of this car, the lock switch 46 of the electronic key 45 is NO, that is, that of the valve of this car. In this case, an instruction to operate the unlock switch 47 of the electronic key 45 is displayed. The user operates the lock switch 46 when the ID code displayed on the liquid crystal display 41 is that of the own vehicle, and operates the unlock switch 47 when the ID code is not that of the own vehicle. Note that an ID code made up of a number or a list of alphabets has a large number of digits, and is therefore omitted from the description in the present specification and the drawings with “**”.

  Then, the control device 32 determines whether or not the ID code displayed on the liquid crystal display 41 is registered, that is, whether or not the lock switch 46 is operated (step S6). If NO in step S6, that is, if the unlock switch 47 is operated and the ID code is not registered, the process proceeds to step S4, and then the ID code of the sensor unit 14 of the vehicle 12 may be obtained. Those having high characteristics are displayed on the liquid crystal display 41. If YES in step S6, that is, if the lock switch 46 is operated and the ID code is registered, the ID code registration number K is increased by 1 (step S7).

  Next, the control device 32 determines whether or not the number of registrations K has reached the number of sensor units 14 of this vehicle (4 in this example) (step S8). If NO in step S8, that is, if the number of registrations K is not 4, the process proceeds to step S4, and the next liquid crystal display 41 that has a high possibility of being the ID code of the sensor unit 14 of the vehicle 12 is displayed. Display. If YES in step S8, that is, if the number of registrations K is 4, the control device 32 again determines the order J to be displayed (step S9). Here, the order J (J = 1, 2, 3, 4) is determined in the order registered in the control device 32 through steps S1 to S8. At this time, the elapsed number N is reset.

  Next, the control device 32 increments the number of elapsed times N by 1 (step S10) and causes the liquid crystal display 41 to display a registration screen B of identification information corresponding to the order J = the number of elapsed times N displayed on the liquid crystal display 41. (Step S11). As shown in FIG. 4B, in the registration screen B, is “ID“ ** 01 ”determined in step S10 a front wheel? ”Is displayed, that is, if the switch is for the front wheel, the lock switch 46 of the electronic key 45 is NO, that is, if the switch is for the rear wheel, the unlock switch 47 of the electronic key 45 is pressed. An instruction to operate is displayed. The user operates the lock switch 46 when the ID code displayed on the liquid crystal display 41 is the front wheel, and operates the unlock switch 47 when the ID code is the rear wheel.

  Then, the control device 32 determines whether or not the ID code displayed on the liquid crystal display 41 is that of the front wheel, that is, whether or not the lock switch 46 has been operated (step S12). If YES in step S12, that is, if the lock switch 46 is operated and the displayed ID code is that of the front wheel valve, the control device 32 displays the registration screen C (step S13). As shown in FIG. 4C, in the registration screen C, is “ID“ ** 01 ”determined in step S10 on the right side? ”Is displayed, that is, if the switch is on the right side, the lock switch 46 of the electronic key 45 is NO, that is, if the switch is on the left side, the unlock switch 47 of the electronic key 45 is pressed. An instruction to operate is displayed. The user operates the lock switch 46 when the ID code displayed on the liquid crystal display 41 is for the right front wheel, and operates the unlock switch 47 when the ID code is for the left front wheel.

  Then, the control device 32 determines whether or not the ID code displayed on the liquid crystal display 41 is on the right side of the front wheel, that is, whether or not the lock switch 46 has been operated (step S14). If YES in step S14, that is, if the lock switch 46 is operated, it is assumed that the ID code displayed on the liquid crystal display 41 is that of the sensor unit 14 provided in front of the right wheel, and the storage device 33 (table Data 34) is stored (step S15). If NO in step S14, that is, if the unlock switch 47 is operated, the ID code displayed on the liquid crystal display 41 is stored in the storage device 33, assuming that it is that of the sensor unit 14 provided on the left front wheel. (Step S16).

  Then, the control device 32 determines whether or not the table data 34 is completed, that is, whether or not ID codes are registered in all the columns of the table data 34 (step S17). If NO in step S17, that is, if the table data 34 is not completed, the process proceeds to step S10. If YES in step S17, that is, if the table data 34 is completed, this series of processing ends.

  If NO in step S12, that is, if the unlock switch 47 is operated and the displayed ID code is that of the rear wheel valve, the control device 32 displays the registration screen C (step S18). . The user operates the lock switch 46 when the ID code displayed on the liquid crystal display 41 is for the right rear wheel, and operates the unlock switch 47 when the ID code is for the left rear wheel.

  Then, the control device 32 determines whether or not the ID code displayed on the liquid crystal display 41 is that of the right rear wheel, that is, whether or not the lock switch 46 has been operated (step S19). If YES in step S19, that is, if the lock switch 46 is operated, it is assumed that the ID code displayed on the liquid crystal display 41 is that of the sensor unit 14 provided on the right rear wheel, and the storage device 33 (table Data 34) (step S20), and the process proceeds to step S17. If NO in step S19, that is, if the unlock switch 47 is operated, the ID code displayed on the liquid crystal display 41 is stored in the storage device 33, assuming that it is that of the sensor unit 14 provided on the left front wheel. (Step S21), and the process proceeds to Step S17.

  As described above, in this example, the ID code of the sensor unit 14 provided in each tire 13 is stored in the storage device 33 by operating the lock switch 46 and the unlock switch 47 provided in the electronic key 45 ( Registration).

As described above in detail, according to the present embodiment, the following effects can be obtained.
(1) The monitoring device 16 detects the identification information (ID code) of the sensor unit 14 on the liquid crystal display 41 of the mobile phone 40 through infrared communication and operates the lock switch 46 and the unlock switch 47 to check whether the information is correct. ID selection information that supports the selection is displayed. Accordingly, the user can register the identification information in the monitoring device 16 only by operating the lock switch 46 or the unlock switch 47 provided on the electronic key 45 in accordance with the instruction displayed on the liquid crystal display 41.

  (2) The monitoring device 16 determines where the position of the tire 13 provided with the sensor unit 14 of the identification information registered in the liquid crystal display 41 of the mobile phone 40 through infrared communication is a lock switch 46 and an unlock switch 47. The position selection information for instructing the selection by the operation is displayed. As a result, the user only operates the lock switch 46 and the unlock switch 47 provided on the electronic key 45 in accordance with the position selection information displayed on the liquid crystal display 41, and the identification information registered in the monitoring device 16. Can be registered in association with the position of the tire 13 on which the sensor unit 14 is provided.

  (3) On the selection screen (identification information selection screen, position information selection screen) displayed on the liquid crystal display 41, the lock switch 46 is displayed if the displayed information is correct, and the unlock switch 47 is displayed if the displayed information is not correct. An instruction to operate was displayed. Thereby, the user can register identification information and position information by a simple operation of operating the lock switch 46 or the unlock switch 47.

(Second Embodiment)
The second embodiment embodying the present invention will be described below. The main difference between the present embodiment and the first embodiment described above is that communication between the vehicle 12 and the mobile communication terminal (the mobile phone 40 in the first embodiment) is impossible, that is, the vehicle 12 has an infrared port. 18 is not provided. For this reason, for convenience of explanation, the same parts as those in the first embodiment are denoted by the same reference numerals, and the explanation thereof is omitted.

  In this case, the user confirms the identification information (ID code) by directly visually recognizing the description of the valve and the bag in which the valve is packed at the time of shipment or the marking of the valve itself. In the present embodiment, the ID code is assumed to be a binary number.

  In the electronic key 45 of this example, the special operation of the lock switch 46 and the unlock switch 47, here, the normal mode for locking and unlocking the vehicle by simultaneously pressing the lock switch 46 and the unlock switch 47, and the identification information are read. Switch between ID code reading modes. In the ID code reading mode, the electronic key 45 temporarily stores “0” when the lock switch 46 is operated and “1” when the unlock switch 47 is operated in a memory (not shown). . For example, when the ID code is “10011”, the unlock switch 47, the lock switch 46, the lock switch 46, the unlock switch 47, and the unlock switch 47 are operated in this order. Thereby, the ID code can be temporarily stored in the memory.

  In a state where the ID code is temporarily stored, the electronic key 45 can store the stored ID code when the lock switch 46 and the unlock switch 47 are specially operated. It transmits to the vehicle 12 (body ECU35). The transmitted ID code is stored in the storage device 33 of the monitoring device 16 via the body ECU 35. In this way, the identification information of the sensor unit 14 can be registered in the vehicle 12 without a mobile communication terminal such as a mobile phone.

As described above in detail, according to the present embodiment, the following effects can be obtained.
(4) When communication means such as infrared communication cannot be used, for example, when the mobile phone 12 is not provided or the vehicle 12 is not provided with the infrared port 18, the identification information of the sensor unit 14 is monitored. 16 can be registered.

In addition, you may change the said embodiment as follows.
In the first embodiment, identification information or the like is displayed on the liquid crystal display 41 of the mobile phone 40 through the infrared port 18, but the mobile phone 40 is limited to the mobile phone 40 as long as it has an infrared communication function. is not. For example, it may be a portable communication terminal that can be connected to the Internet or the like. Even if comprised in this way, the effect similar to the said embodiment can be acquired.

  In the first embodiment, infrared communication is used as short-range wireless communication, but other communication methods may be used. For example, there are IrDA communication and IrSimple communication. Even when these are used, the same effect as the above-described embodiment can be obtained.

  In the first embodiment, identification information is registered in the monitoring device 16 one by one. However, a plurality of identification information such as two or four may be registered at a time. By doing so, the number of questions to be asked to the user is reduced, so that the number of operations of the lock switch 46 or unlock switch 47 of the electronic key 45 necessary for registration of identification information is reduced. Therefore, the time required for registration can be omitted. The identification information and the position information of the sensor unit 14 may be registered together. For example, if it is displayed on the liquid crystal display 41 such as “** 01 is right in front of this car” and if it is selected whether or not this is correct, the identification information and the position information are registered together. Can do. Even in this case, since the number of questions to be asked to the user is reduced, the number of operations of the lock switch 46 or the unlock switch 47 of the electronic key 45 necessary for registration of identification information and position information is reduced. Therefore, the time required for registration can be omitted.

  In the first embodiment, four ID codes that are frequently received may be displayed on the liquid crystal display 41 at once, and the correctness of the ID codes may be asked. Since the number of questions asked to the user is reduced, the number of operations of the lock switch 46 or unlock switch 47 of the electronic key 45 required for registration of identification information and position information is reduced. Therefore, the time required for registration can be omitted.

In the first embodiment, the ID code location registration may be omitted.
In the first embodiment, the ID code is not necessarily required for each reception frequency from the sensor unit 14.

  In the above embodiments, the operation buttons operated when registering the identification information and the like are not limited to the lock switch 46 and the unlock switch 47. For example, a slide door opening / closing switch or a trunk opening / closing switch may be used. Even if comprised in this way, the effect similar to the said embodiment can be acquired.

  In each of the above embodiments, the body ECU 35 need not be provided as long as the electronic key 45 and the monitoring device 16 can communicate wirelessly.

DESCRIPTION OF SYMBOLS 11 ... Tire pressure monitoring system, 12 ... Vehicle, 13 ... Tire, 14 ... Sensor unit, 15 ... Vehicle body, 16 ... Monitoring device, 17 ... Display device, 18 ... Infrared port, 21 ... Acceleration sensor, 22 ... Air pressure sensor, 23 DESCRIPTION OF SYMBOLS ... Transmitter, 24 ... Control circuit, 25 ... Storage device, 31 ... Receiver, 32 ... Control device, 33 ... Storage device, 34 ... Table data, 35 ... Body ECU, 40 ... Mobile phone, 41 ... Liquid crystal display, 45 ... Electronic key, 46 ... Lock switch, 47 ... Unlock switch.

Claims (5)

In a sensor unit registration system for registering a sensor unit that is provided in each tire and transmits a wireless signal including air pressure information and identification information unique to itself in an in-vehicle device that monitors the air pressure of each tire based on these wireless signals,
The sensor unit registration system in which the identification information is registered in the in-vehicle device by using an operation of an electronic key in which wireless communication with the in-vehicle device is possible and wireless communication with the sensor unit is disabled. In the sensor unit registration system according to claim 1,
The sensor unit registration system, wherein the electronic key is provided with at least two operation switches for operating an in-vehicle device through wireless communication. In the sensor unit registration system according to claim 2,
The in-vehicle device transmits the identification information from each sensor unit and instruction information for selecting whether the identification information is correct or not by operating the electronic key to the short-range wireless communication with the mobile communication terminal. A sensor unit registration system that has a communication port that can be transmitted via the communication port and displays a question from the in-vehicle device that is received via the communication port. In the sensor unit registration system according to claim 3,
A sensor unit registration system that transmits to the portable communication terminal position selection information for selecting which position of the registered identification information corresponds to the sensor unit provided in the tire. In a sensor unit registration method for registering a sensor unit that is provided in each tire and transmits a wireless signal including the air pressure information and identification information unique to itself in an in-vehicle device that monitors the air pressure of each tire based on these wireless signals,
Registration of the identification information in the in-vehicle device is a sensor unit registration method that is performed by using an operation of an electronic key in which wireless communication with the in-vehicle device is possible and wireless communication with the sensor unit is disabled.

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