JP7124416B2 - Sensor ID registration system - Google Patents

Description

The present invention relates to a sensor ID registration system for registering sensor IDs that identify sensors attached to wheels of a vehicle.

Vehicles are equipped with various systems for comfortable driving. For example, there is a tire pressure monitoring system (TPMS) that monitors tire pressure and detects tire pressure. A TPMS has a system in which an air pressure sensor is provided inside each tire. In this method, tire air pressure data detected by each sensor is transmitted to the in-vehicle device together with the sensor ID that identifies the sensor. Reduced pressure can be detected. However, if the data received by the in-vehicle device can be determined on the side of the in-vehicle device to which wheel the tire data is attached, the convenience of the TPMS will be further improved. Therefore, there is a system for registering information (hereinafter referred to as sensor ID information) in which a sensor ID and position information of a wheel (that is, a tire) corresponding to the sensor are associated in advance in this type of in-vehicle device. Are known.

Patent Documents 1 and 2 disclose a system for registering sensor ID information in an in-vehicle device. Patent Document 1 discloses a key operation-free system in which an ECU mounted on a vehicle and an electronic key communicate with each other. The magnetic field strength of each trigger signal is calculated. The two calculated magnetic field intensities are transmitted together with the sensor ID from each sensor unit to the ECU mounted on the vehicle. The ECU locates each sensor by plotting the two magnetic field strengths from each sensor unit on a plane with magnetic field strength on the vertical and horizontal axes.

Patent Literature 2 also discloses a key operation-free system. In this system, the tire position information entered by the user into a portable device (electronic key) is first sent from the portable device to the sensor unit, and the sensor ID associated with the tire position information is sent from the sensor unit to the vehicle. sent to the unit.

JP 2011-144625 A JP 2012-126192 A

However, the configuration of Patent Literature 1 requires installation of a system-dedicated transmitter, which may be disadvantageous in terms of cost and design flexibility.

In the configuration of Patent Literature 2, user input operations are required for the number of sensors (that is, the number of tires), and sensor ID information of a plurality of sensors cannot be registered at the same time. Therefore, every time it is necessary to register the sensor ID information, the user is forced to perform complicated operations. It should be noted that registration of sensor ID information may be required not only in the first registration of sensor ID information, but also in tire rotation where tire positions are changed, tire replacement, and the like.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a sensor ID registration system that allows a user to associate and register a sensor ID that identifies a sensor attached to a wheel and position information of the wheel with a simple operation. .

A sensor ID registration system according to a first aspect of the present invention includes: a plurality of sensor units attached to a plurality of wheels of a vehicle; a portable device that transmits a request signal to each of the sensor units according to a user's operation; A registration control device provided separately or integrally with a portable device is provided. Each of the sensor units includes a sensor that detects the state of the tire mounted on the wheel, a communication unit that receives the request signal from the portable device, a signal strength of the request signal that is calculated, and the signal strength. and a control unit that generates sensor information including a sensor ID that identifies the sensor. The communication unit transmits the sensor information to the registration control device. The registration control device includes a sensor information receiving unit that receives the sensor information from each sensor unit, and position information of the wheel to which each sensor unit is attached based on the signal strength included in the sensor information. a registration information generation unit that identifies and generates sensor ID information in which the sensor ID included in the sensor information and the position information of the wheel are associated with each of the sensor units; and registering the sensor ID information. and a registration processor.

A sensor ID registration system according to a second aspect of the present invention is the sensor ID registration system according to the first aspect, wherein the registration control device includes a registration completion notification indicating that the registration process has been completed normally, and It further includes a registration status notification unit that generates at least one of registration incompletion notifications indicating that the registration processing has not been completed normally.

A sensor ID registration system according to a third aspect of the present invention is the sensor ID registration system according to the first aspect or the second aspect, wherein the sensor detects at least one of air pressure and temperature of the tire.

A sensor ID registration system according to a fourth aspect of the present invention is the sensor ID registration system according to any one of the first aspect to the third aspect, wherein the sensor information is information about the state of the tire detected by the sensor. including.

A sensor ID registration system according to a fifth aspect of the present invention is the sensor ID registration system according to any one of the first aspect to the fourth aspect, wherein the portable device is a key of the vehicle.

A sensor ID registration system according to a sixth aspect of the present invention is the sensor ID registration system according to any one of the first aspect to the fourth aspect, wherein the portable device is a portable communication terminal.

A sensor ID registration system according to a seventh aspect of the present invention is the sensor ID registration system according to any one of the first aspect to the sixth aspect, wherein the registration control device is mounted on the vehicle.

A sensor ID registration system according to an eighth aspect of the present invention is the sensor ID registration system according to any one of the first aspect to the sixth aspect, wherein the registration control device is a portable communication terminal.

A sensor ID registration method according to a ninth aspect of the present invention includes the following steps.
- A step of providing a sensor ID registration system according to any one of the first to eighth aspects - In order for the user to register the sensor ID information, the portable device is positioned at different distances from the plurality of tires. performing said operation on

ADVANTAGE OF THE INVENTION According to the 1st viewpoint of this invention, it becomes possible for a user to link|relate and register sensor ID which identifies the sensor attached to the wheel, and the positional information on a wheel by simple operation. As a result, for example, the air pressure of each tire can be visually displayed in association with position information.

The figure which shows the whole structure of the sensor ID registration system which concerns on one Embodiment of this invention. FIG. 2 is a block diagram showing the electrical configuration of the sensor ID registration system; FIG. 3 is a block diagram showing the electrical configuration of the control unit; The figure explaining the positional relationship of a portable device and a vehicle. FIG. 3 is a flowchart showing processing performed by a portable device; FIG. 4 is a flowchart showing processing performed by the sensor unit; FIG. 4 is a flowchart showing processing performed by a control unit; FIG. 4 is a diagram showing a display in which air pressure and sensor position information are associated;

A sensor ID registration system according to an embodiment of the present invention will be described below with reference to the drawings.

<1. Overall configuration of sensor ID registration system>
FIG. 1 is a diagram showing the overall configuration of a sensor ID registration system 100 (hereinafter sometimes simply referred to as registration system 100) according to one embodiment of the present invention. FIG. 2 is a block diagram showing the electrical configuration of the registration system 100. As shown in FIG. The registration system 100 includes a portable device 20, a control unit 50 that operates as a TPMS (Tire Pressure Monitoring System) mounted on the vehicle 1, and sensor units 30a to 30d. is a system for registering in the control unit 50 the sensor IDs that identify the sensors 31a to 31d included in the respective sensors 31a to 31d. The vehicle 1 is a four-wheeled vehicle and includes a front left wheel FL, a front right wheel FR, a rear left wheel RL and a rear right wheel RR. Tires T _FL , T _FR , T _RL , and T _RR are attached to wheels FL, FR, RL, and RR, respectively, and sensor units 30a to 30d are attached to tires T _FL , T _FR , T _RL , and T _RR , respectively. built into the The sensor units 30a to 30d have different attached tires, but have the same structure and function. Therefore, the sensor units 30a to 30d are sometimes called the sensor unit 30 without distinguishing between them. The portable device 20 is a key called an electronic key of a keyless system, a smart key, a remote control key, or the like, which locks or unlocks the doors of the vehicle 1 from the outside of the vehicle 1 by wireless communication. In this embodiment, communication between the portable device 20 and the vehicle 1 is one-way communication in which the portable device 20 does not receive signals from the vehicle 1 . Communication between the portable device 20 and the sensor unit 30 is also one-way communication, and the portable device 20 does not receive signals from the sensor unit 30 .

In this embodiment, the sensor units 30a-30d are integrally attached to the air valves of the tires T _FL , T _FR , T _RL , and T _RR and driven by built-in batteries. The sensor units 30a to 30d include sensors 31a to 31d and communication units 32a to 32d, respectively. The sensors 31a to 31d are sensors for detecting the states of the tires T _FL , T _FR , T _RL and T _RR respectively. In this embodiment, the sensors 31a to 31d are sensors for detecting air pressure, and the detection method is not limited as long as the air pressure inside each tire can be detected. For example, strain gauge, diaphragm, or semiconductor sensors can be used.

The communication units 32a to 32d communicate with external devices. The communication units 32a to 32d receive request signals RS transmitted from the portable device 20, respectively. Further, the communication units 32a to 32d transmit various data including air pressure data detected by the sensors 31a to 31d and sensor information described later to the I/O interface 11 of the control unit 50 (see FIG. 3).

Further, the sensor units 30a-30d respectively include controllers 33a-33d and storage devices 34a-34d. The control units 33a to 33d each include a CPU, ROM and RAM. A program for controlling the operation of the sensor unit 30 is stored in the ROM, and the CPU reads and executes the program, so that the control units 33a to 33d perform various processes described later in the sensor units 30a to 30d, respectively. to control. For example, the control units 33a-33d calculate the signal strength (dB) of the request signal RS received by the communication units 32a-32d, respectively. The storage devices 34a-34d are non-volatile storage media. The storage devices 34a to 34d store sensor IDs, which are information for identifying the sensors 31a to 31d, respectively. The controllers 33a to 33d generate sensor information including the calculated signal strength and the sensor IDs read from the storage devices 34a to 34d. It should be noted that the sensor information of the present embodiment includes data on the air pressure of each tire detected by the sensors 31a to 31d in addition to the signal strength and the sensor ID.

A portable device 20 as an electronic key includes push buttons 21 a and 21 b , a control section 22 and a transmission section 23 . The control unit 22 includes a CPU, ROM and RAM. A program for controlling the operation of the portable device 20 is stored in the ROM, and the CPU reads and executes the program so that the control unit 22 controls various processes in the portable device 20, which will be described later. The transmission unit 23 is a communication interface that communicates with an external device, and has only a transmission function in this embodiment. The buttons 21a and 21b are used by the user to unlock/lock the doors of the vehicle 1 by remote control. 21a is an unlock button and 21b is a lock button. The control unit 22 detects that the buttons 21a and 21b have been pressed, and is activated as the keyless control unit 24. FIG. The keyless control unit 24 generates a signal requesting that the door be unlocked/locked according to the button pressed by the user, and transmits the signal to the control unit 50 of the vehicle 1 via the transmission unit 23 .

The portable device 20 also functions as a terminal for pre-registering sensor ID information as a pre-process for the _tire pressure reduction detection process performed by the control unit _{50 operating} as the _TPMS . . The sensor ID information is information that associates the sensor IDs of the sensors 31a to 31d with position information, and indicates where on the vehicle 1 the sensor specified by each sensor ID is attached. The position information of each sensor can be expressed as wheel (that is, tire) position information, and in the present embodiment, it is expressed as either front left, front right, rear left, or rear right.

The controller 22 further operates as an RS generator 25 that generates a request signal RS. When detecting that the buttons 21a and 21b have been pressed by the user, the control unit 22 executes unlocking processing, locking processing, or sensor ID information registration processing. The button for commanding execution of registration processing of sensor ID information can also be used as a button for commanding execution of unlocking processing or locking processing. In this embodiment, when the user presses the button 21a for two seconds or longer, the RS generator 25 is activated to generate the request signal RS. The generated request signal RS is transmitted to each sensor unit 30 by the transmitter 23 . The request signal RS is, for example, an LF (long wave) band signal, and requests each sensor unit 30 to generate sensor information and transmit it to the control unit 50 .

FIG. 3 is a block diagram showing the electrical configuration of the control unit 50. As shown in FIG. The control unit 50 is a unit for controlling various processes including pressure reduction detection processing for tires T _FL , T _FR , T _RL , and T _RR and registration processing for sensor ID information prior thereto. It has a ROM 13, a RAM 14, and a non-volatile and rewritable storage device 15. FIG. The I/O interface 11 is a communication device for performing wired or wireless communication with external devices such as the sensor unit 30 and the display device 3 . A program 4 for controlling the operation of each part of the vehicle 1 is stored in the ROM 13 . The CPU 12 virtually operates as a registration information generation unit 51 , a registration processing unit 52 , a registration status notification unit 53 , a decompression determination unit 54 , and a decompression warning generation unit 55 by reading and executing the program 4 from the ROM 13 . Details of the operation of each unit will be described later. The storage device 15 is composed of a hard disk, a flash memory, or the like. Note that the storage location of the program 4 may be the storage device 15 instead of the ROM 13 . The RAM 14 and the storage device 15 are appropriately used for calculation of the CPU 12 .

The display device 3 can be implemented in any form, such as a liquid crystal monitor or a liquid crystal display device, as long as it can display various notifications to notify the user. The mounting position of the display device 3 can be selected as appropriate, but it is preferable to provide it at a position that is easily recognized by the driver, such as on the instrument panel. When the control unit 50 is connected to a car navigation system, a monitor for car navigation can be used as the display 3, and a multi-information display (monitor) can also be used as the display 3. is. When a monitor is used as the display device 3, the notification can be an icon or character information displayed on the monitor.

<2. Registration Processing of Sensor ID Information>
A registration process for registering the sensor ID information of the sensors 31a to 31d attached to the wheels FL, FR, RL, and RR in the control unit 50 will be described below with reference to FIGS. 4 to 7. FIG. The process of registering the sensor ID information starts when the user performs a predetermined operation on the portable device 20 . As described above, the registration process of the present embodiment starts when the user presses and holds the button 21a of the portable device 20, and ends when the display 3 displays a registration completion notification or an error notification (registration incomplete notification).

FIG. 4 is a bird's-eye view of the positional relationship between the user (portable device 20) and the vehicle 1 when registering the sensor ID information. In starting the registration process, the user turns on the ignition switch of the vehicle 1, carries the portable device 20 and moves out of the vehicle so that the portable device 20 exists within the predetermined area A, and presses the button in this state. 21a is held down for 2 seconds or longer. Area A is an area centered on point P, and is defined in advance. A point P is a point outside the vehicle 1, and is a point at which the difference in strength of signals received by the respective sensor units 30 from the portable devices 20 located there becomes large, preferably maximum or maximum. be. Each point in area A is a different distance away from the tires T _FL , T _FR , T _RL , T _RR . The signal strength of wireless communication is approximately inversely proportional to the square of the distance between the transmitter and receiver when there are no obstacles between the transmitter and receiver and there is no interference with other signals. That is, the point P can be a position where the difference in distance from each sensor unit 30 is large, preferably maximum or maximum. It can be the intersection of tangents. The radius of area A can be determined as appropriate.

FIG. 5 is a diagram showing the processing performed by the portable device 20. As shown in FIG. In step S1, the control unit 22 detects pressing of the button 21a and determines whether the button 21a has been pressed for a long time or not. If it is determined that the button 21a has been operated but not long pressed, it is determined that the portable device 20 has been operated as an electronic key, and the process proceeds to keyless processing. Here, since the unlock button 21a is operated, the door is unlocked. On the other hand, if it is determined to be a long press, the process proceeds to step S2 to register the sensor ID information. If the button 21a is not operated, step S1 is repeated.

In step S2, the controller 22 activated as the RS generator 25 generates a request signal RS.

In the subsequent step S3, the request signal RS is transmitted by the transmission unit 23. FIG. When the request signal RS is received by the communication units 32a to 32d of the sensor units 30a to 30d, the registration processing of the sensor ID information is taken over by the sensor units 30a to 30d.

FIG. 6 is a diagram showing the processing performed by the sensor unit 30. As shown in FIG. If the sensor units 30a to 30d operate normally, these four sensor units 30a to 30d perform similar processing at approximately the same timing. Therefore, the sensor unit 30a will be described as an example.

The sensor unit 30a of this embodiment is configured to transition between at least three types of modes: a sleep mode, an air pressure detection mode, and a sensor information transmission mode. In the sleep mode, the sensor unit 30a does not detect air pressure or communicate with the outside, thereby saving power consumption. In the air pressure detection mode, the communication section 32a transmits data on the air pressure of the tire T _FL detected by the sensor 31a to the control unit 50 at predetermined intervals. In the sensor information transmission mode, the communication section 32a transmits the sensor information generated by the control section 33a to the control unit 50. FIG. Note that the type of mode is not limited to this, and there may be other modes, or there may be no sleep mode. As will be described later, the transition from another mode to the sensor information transmission mode is performed on the condition that the request signal RS is received. Further, the sensor information transmission mode transitions to the air pressure detection mode on condition that transmission of the sensor information to the control unit 50 is completed. Conditions for transitioning from the sleep mode to the air pressure detection mode or from the air pressure detection mode to the sleep mode can be set as appropriate, and various modes are conceivable, so description thereof will be omitted. The sensor unit 30a is in the air pressure detection mode or the sleep mode at the start of the main registration process. When the request signal RS is received by the communication unit 32a in step S31, the sensor unit 30a switches from the air pressure detection mode or sleep mode to the sensor information transmission mode in step S32.

In step S33, the control unit 33a calculates the signal strength of the request signal RS received by the communication unit 32a based on the request by the request signal RS. The signal strength (dB) of the request signal RS is calculated, for example, based on the power received by the communication unit 32a. In subsequent step S34, the controller 33a reads the sensor ID of the sensor 31a from the storage device 34a.

In subsequent step S35, the control unit 33a generates sensor information in which the signal strength and the sensor ID are associated. At this time, in the present embodiment, the controller 33a acquires air pressure data via the sensor 31a and includes the data in the sensor information together with the signal strength and the sensor ID. In step S<b>36 , the communication section 32 a transmits the generated sensor information to the control unit 50 . When the transmission of the communication section 32a is completed, the process proceeds to step S37, and the sensor unit 30a shifts to the air pressure detection mode.

FIG. 7 is a diagram showing the processing performed by the control unit 50. As shown in FIG. In step S51, the control unit 50 receives the sensor information transmitted in step S36 from the communication sections 32a to 32d of each sensor unit 30 via the I/O interface 11 (sensor information receiving section). When the system is operating normally, processing in each sensor unit 30 is substantially parallel in real time. Therefore, the control unit 50 receives sensor information from each sensor unit 30 at approximately the same timing.

Next, in step S52, the registration information generator 51 determines whether sensor information has been received from all the sensor units 30a to 30d. If it is determined that the sensor information reception count does not correspond to the number of sensor units 30 (NO), the process proceeds to step S53, and the registration status notification unit 53 generates an error notification. In subsequent step S54, the registration status notification unit 53 displays an error notification on the display device 3 and prompts the user to operate the portable device 20 again. Also, at this time, instead of or in addition to the display on the display 3, the user may be notified of the failure of the registration process by using a sound such as a horn of the vehicle 1 or a buzzer.

If it is determined in step S52 that the number of sensor information receptions matches the number of sensor units 30 (YES), the process proceeds to step S55. In step S55, the registration information generator 51 compares the four signal intensities contained in the sensor information from the four sensor units 30a to 30d, and ranks these signal intensities in descending order of signal intensities (that is, corresponding to each It is determined whether or not the sensor information to be processed can be sorted. If the differences between the four signal intensities do not exceed the respective predetermined thresholds and it is determined that the sensor information cannot be sorted (NO), the process proceeds to steps S53 and S54 described above. When the differences between the four signal intensities exceed the respective predetermined thresholds and it is determined that the sensor information can be sorted (YES), the process proceeds to step S56.

The distances between each point in area A and wheels FL, FR, RL, and RR are shorter in this order. Further, since the signal strength increases as the distance from the portable device 20 in area A decreases, the sorted sensor information corresponds to wheels FL, FR, RL, and RR in descending order of signal strength. Presumed. In step S56, the registration information generation unit 51 identifies the position information of the wheel to which the sensor unit 30 of the transmission source is attached from the sort order of the sensor information, and identifies the position information of the wheel and the sensor ID included in the sensor information. is associated with the sensor ID information.

In step S<b>57 , the registration processing unit 52 registers (stores) the sensor ID information in the storage device 15 . In addition, the registration processing unit 52 also associates the air pressure data of the tires T _FL , T _FR , T _RL and T _RR included in the sensor information with the tires T _FL , T _FR , T _RL and T _RR and stores them in the storage device 15 . to register. This air pressure data is appropriately referred to as an initial air pressure value or the like in the decompression detection process after the main registration process. In subsequent step S58, the registration status notification unit 53 generates a registration completion notification. In step S59, the registration status notification unit 53 causes the display device 3 to display a registration completion notification to inform the user that the registration processing of the sensor ID information has been completed. At this time, instead of or in addition to the display on the display 3, the user may be notified of the success of the registration process by using a sound such as a horn of the vehicle 1 or a buzzer.

<3. Decompression detection process>
The sensor ID information registered in the storage device 15 of the control unit 50 is referred to for pressure reduction detection processing of the tires T _FL , T _FR , T _RL , and T _RR performed by the control unit 50 . The reduced pressure detection process is performed when the control unit 50 is ON and each sensor unit 30 is in the air pressure detection mode. Specifically, the reduced pressure detection process is performed in the following procedure. First, the sensors 31a to 31d detect the air pressure of the tires T _FL , T _FR , T _RL and T _RR to which they are attached, respectively, and the communication units 32a to 32d transmit the air pressure data detected at predetermined intervals. It is sequentially transmitted to the control unit 50 together with the sensor ID.

When the control unit 50 receives the air pressure data and the sensor ID from each of the sensor units 30a to 30d, the pressure reduction determination unit 54 compares the received sensor ID with the sensor ID information registered in the storage device 15, and obtains the detection data. and the location information of the sensor. That is, the air pressure data transmitted from the sensor units 30a to 30d are associated with the wheels FL, FR, RL, and RR, respectively. At this time, the decompression warning generator 55 can display the current tire pressure on the display 3 in real time in a manner corresponding to the wheel. For example, as shown in FIG. 8, a numerical value indicating the air pressure of each tire (in the example of FIG. 8, the unit is kPa) is displayed in the vicinity of the graphic imitating each tire included in the graphic imitating the vehicle 1. can be a printed graphic. It should be noted that such a display can be displayed on the display 3 in response to a request from the user instead of being displayed all the time.

Subsequently, the decompression determination unit 54 compares the decompression threshold value stored in the storage device 15 or the ROM 13 in advance with the data of each air pressure, and determines the decompression of the tire mounted at each position. A deflation threshold may be an air pressure value below which the tire is determined to be deflated. Alternatively, the pressure reduction threshold may be the air pressure reduced by a predetermined pressure reduction rate from the initial value of the air pressure of each tire registered in the storage device 15 . The decompression determination unit 54 determines that the detected air pressure data is normal if it is equal to or greater than the decompression threshold, and that it is decompression (abnormal) if it is less than the decompression threshold. Note that the pressure reduction threshold may be set to a different value depending on the position of the wheel.

If the above determination of pressure reduction is normal for all tire air pressures, the pressure reduction determination unit 54 repeats the above-described processing. On the other hand, if it is determined that at least one tire is decompressed, the decompression warning generation unit 55 generates a warning signal notifying decompression, and issues a decompression warning via an external device or the like. The warning is not limited to any mode as long as it can notify the user that decompression is occurring. can do. In place of or in addition to this, in the graphic of the vehicle 1 shown in FIG. 8 described above, means of reversing the color of the number of the air pressure of the decompressed tire, displaying it in a large size, blinking it, or the like may be used. .

<4. Features>
In the above-described embodiment, the sensor IDs of all the sensors 31a to 31d can be obtained by the user operating the portable device 20 once in the predetermined area A (more specifically, pressing the button 21a once). , can be registered in the vehicle 1 in association with the wheel position information. That is, there is no need to manually set wheel position information in the portable device in advance, or to move to the vicinity of each wheel and repeat the same operation, and the method according to the above embodiment is highly convenient for the user. . In addition, since the wheel position information and the sensor ID are automatically associated, the user does not unintentionally mistakenly register the corresponding relationship between the wheel position and the sensor ID. Furthermore, there is no need to install new equipment in the vehicle, and the existing in-vehicle equipment and portable device of the keyless system can be used, which is excellent in terms of cost. In the pressure reduction detection process of the vehicle 1, the current air pressure of each tire can be visually displayed in association with the position information based on the registered sensor ID information. With this configuration, the user can easily grasp the state of the air pressure of the tire, and can quickly notice the occurrence of pressure reduction.

<5. Variation>
Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the scope of the invention. For example, the following changes are possible. Also, the gist of the following modified examples can be combined as appropriate.

<5-1>
The user may press the button 21a twice or more. In this case, the controllers 33a to 33d of the sensor unit 30 can calculate the average value of the signal strengths received multiple times and include it in the sensor information. Alternatively, the user may press the button 21a in two or more different predetermined areas. For example, when areas A1 and A2 are set, the user may press the button 21a one or more times in each of areas A1 and A2. By doing so, it is expected that the accuracy of estimating the wheel position information by the registration information generating section 51 of the control unit 50 is improved, and the reliability of the registration system 100 is further enhanced.

<5-2>
In the keyless system of the above embodiment, communication between the vehicle 1 and the portable device 20 and communication between the sensor unit 30 and the portable device 20 are one-way. However, it can also be applied to a system in which at least one of the communication between the vehicle 1 and the portable device 20 and the communication between the sensor unit 30 and the portable device 20 is bidirectional. For example, the mobile device 20 may be a communication terminal equipped with a computer with higher functionality, such as a smart phone or smart watch. In this case, the notification generated by registration status notification unit 53 may be transmitted to portable device 20 . The portable device 20 can notify the user of the registration state by means of a message or icon on the display included in the portable device 20, or a blinking pattern of the lamp, and/or notify the user of the registration state by emitting a notification sound. can do. In this way, the user can know the completion of the registration process or an error through the portable device 20 at hand without checking the display 3 of the vehicle 1 . Alternatively, the control section 22 of the portable device 20 instead of the control unit 50 may include the registration information generation section 51 , the registration processing section 52 , and the registration status notification section 53 . In this case, the portable device and the registration control device are integrated. Further, in this case, the sensor information transmitted from the sensor unit 30 to the control unit 50 is further transmitted from the control unit 50 to the portable device 20 via wireless communication, or the sensor information is directly transmitted from the sensor unit 30. It can be transmitted to the portable device 20 .

<5-3>
Although the sensors 31a to 31d are pneumatic sensors in the above embodiment, the present invention is not limited to this example. For example, sensors 31a-31d may alternatively or additionally include temperature sensors. Further, the positions where the sensors 31a to 31d are attached are not limited to the air valves of the tires T _FL , T _FR , T _RL and T _RR . The sensors 31a-31d may be attached, for example, to the back surface of the tread of the tire, or may be fixed to the wheel by a belt, as long as it is possible to detect the air pressure in the tire.

<5-4>
Notification of the registration status is not limited to the examples described above, and can be communicated to the user in various manners. For example, the registration status may be notified by lighting the headlights of the vehicle 1 in a lighting pattern according to the registration status. In addition, notification by voice through the speaker of the vehicle 1 is also conceivable. The error notification also includes instructions for the user to check for any obstacles between the portable device 20 and the vehicle 1 and to change the rotation position at which the tires stop so that the user can remove the cause of the error. may include prompts to

1 vehicle 100 sensor ID registration system 3 display device 20 portable device 21a (unlock) button 23 transmission unit 25 RS generation unit 30a to 30d sensor unit 31a to 31d sensor 32a to 32d communication unit 33a to 33d control unit 34a to 34d storage device 50 control unit (registration control device)
11 I/O interface (sensor information receiver)
51 registration information generation unit 52 registration processing unit 53 registration status notification unit A area RS request signal FL front left wheel FR front right wheel RL rear left wheel RR rear right wheel T _FL tire (front left)
T _FR tire (right front)
T _RL tire (left rear)
T _RR tire (right rear)

Claims (10)

a plurality of sensor units respectively attached to a plurality of wheels of the vehicle;
a portable device that transmits a request signal to each of the sensor units according to a user's operation;
a registration control device provided separately or integrally with the portable device;
with
Each sensor unit is
a sensor that detects the state of the tire mounted on the wheel;
a communication unit that receives the request signal from the portable device;
A control unit that calculates the signal strength of the request signal and generates sensor information including the signal strength and a sensor ID that identifies the sensor,
The communication unit transmits the sensor information to the registration control device,
The registration control device
a sensor information receiving unit that receives the sensor information from each of the sensor units;
Based on the signal strength included in the sensor information, position information of the wheel to which each sensor unit is attached is specified, and for each sensor unit, the sensor ID included in the sensor information and the wheel a registration information generating unit that generates sensor ID information associated with location information;
a registration processing unit that performs registration processing of the sensor ID information;
A sensor ID registration system, comprising: The request signal is transmitted to each of the sensor units for each transmission of the portable device;
The sensor ID registration system according to claim 1. The registration control device includes a registration status notification unit that generates at least one of a registration completion notification indicating that the registration processing has been completed normally and a registration incompletion notification indicating that the registration processing has not been completed normally. further including,
The sensor ID registration system according to claim 1 or 2 . the sensor detects at least one of air pressure and temperature of the tire;
The sensor ID registration system according to any one of claims 1 to 3 . The sensor information includes information about the state of the tire detected by the sensor,
The sensor ID registration system according to any one of claims 1 to 4 . The portable device is a key of the vehicle,
The sensor ID registration system according to any one of claims 1 to 5 . The portable device is a portable communication terminal,
The sensor ID registration system according to any one of claims 1 to 5 . The registration control device is mounted on the vehicle,
The sensor ID registration system according to any one of claims 1 to 7 . The registration control device is a portable communication terminal,
The sensor ID registration system according to any one of claims 1 to 7 . providing a sensor ID registration system according to any one of claims 1 to 9 ;
the user performing the operation on the portable device at positions at different distances from the plurality of tires in order to register the sensor ID information;
including,
Sensor ID registration method.

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