JP2019188956A - Sensor ID registration system - Google Patents

Abstract

To provide a sensor ID registration system which can register sensor ID by which a user identifies a sensor fitted to a wheel by a simple operation, and positional information concerning the wheel in association with each other.SOLUTION: Each sensor unit 30 includes: a sensor 31 which detects a state of tires T, T, T, T; a communication part 32 which receives a request signal from a portable machine 20; and a control part 33 which calculates a signal strength of the request signal, and generates sensor information including the signal strength and sensor ID which identifies the sensor. The communication part transmits sensor information to a registration control device 50. The registration control device receives sensor information from each sensor unit, specifies positional information concerning wheels FL, FR, RL, RR, to which each sensor unit is fitted, on the basis of the signal strength, and registers sensor ID and wheel positional information in association with each other for each sensor unit.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a sensor ID registration system for registering a sensor ID for identifying a sensor attached to a wheel of a vehicle.

  Various systems for comfortable driving are mounted on the vehicle. For example, a tire pressure monitoring system (TPMS) that monitors tire pressure and detects tire pressure reduction may be used. In TPMS, there is a method in which an air pressure sensor is provided inside each tire. In this method, tire pressure data detected by each sensor is transmitted to the in-vehicle device together with a sensor ID for identifying the sensor. Therefore, by registering the sensor ID of each sensor in the in-vehicle device in advance, Depressurization can be detected. However, the convenience of the TPMS can be further improved if the in-vehicle device can determine which wheel the data received on the in-vehicle device side is the data of the tire attached to. Therefore, 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 in advance are registered 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. First, sensor units for each wheel are transmitted from two transmitters at different positions at different timings. The trigger signal is received, and the magnetic field strength of each trigger signal is calculated. The calculated two magnetic field strengths are transmitted from each sensor unit to the ECU mounted on the vehicle together with the sensor ID. The ECU specifies the position of each sensor by plotting the two magnetic field strengths from each sensor unit on a plane having the magnetic field strength as the vertical axis and the horizontal axis.

  Similarly, Patent Document 2 discloses a key operation free system. In the system, first, the tire position information input by the user to the portable device (electronic key) is transmitted from the portable device to the sensor unit, and the sensor ID associated with the tire position information is mounted on the vehicle from the sensor unit. Sent to the unit.

JP 2011-144625 A JP 2012-126192 A

  However, in the configuration of Patent Document 1, it is necessary to install a transmitter dedicated to the system, which may be disadvantageous in terms of cost and design freedom.

  In the configuration of Patent Document 2, the user's input operation is required by the number of sensors (that is, the number of tires), and sensor ID information of a plurality of sensors cannot be registered simultaneously. Therefore, every time it is necessary to register the sensor ID information, the user is forced to perform a complicated operation. Note that the registration of sensor ID information may be required not only in the case of registering sensor ID information first, but also in the case of tire rotation for changing the position of a tire, replacement of a tire, and the like.

  An object of the present invention is to provide a sensor ID registration system in which a user can easily register a sensor ID for identifying a sensor attached to a wheel and position information of the wheel by 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 sensor unit according to a user operation, And a registration control device provided separately or as a unit with the portable device. Each sensor unit includes a sensor that detects a state of a tire mounted on the wheel, a communication unit that receives the request signal from the portable device, calculates a signal strength of the request signal, and the signal strength, A controller that generates sensor information including a sensor ID for identifying 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 the sensor units; and position information of the wheels to which the sensor units are attached based on the signal intensity included in the sensor information. For each of the sensor units, a registration information generation unit that generates sensor ID information in which the sensor ID included in the sensor information and the wheel position information are associated with each other, and the sensor ID information is registered. And a registration processing unit.

  A sensor ID registration system according to a second aspect of the present invention is a 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 incomplete notifications indicating that the registration process has not been completed normally.

  The sensor ID registration system which concerns on the 3rd viewpoint of this invention is a sensor ID registration system which concerns on the 1st viewpoint or the 2nd viewpoint, Comprising: The said sensor detects at least one of the pneumatic pressure and temperature of the said tire.

  The sensor ID registration system which concerns on the 4th viewpoint of this invention is a sensor ID registration system which concerns on either of the 1st viewpoint to the 3rd viewpoint, Comprising: The said sensor information is the information regarding the state of the said tire which the said sensor detected including.

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

  The sensor ID registration system which concerns on the 7th viewpoint of this invention is a sensor ID registration system which concerns on either of the 1st viewpoint to the 6th viewpoint, Comprising: The said registration control apparatus is mounted in the said 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 to sixth aspects, wherein the registration control device is a portable communication terminal.

The sensor ID registration method according to the ninth aspect of the present invention includes the following steps.
The step of providing a sensor ID registration system according to any one of the first to eighth aspects. The portable device at a position where the user is at a different distance from the plurality of tires in order to register the sensor ID information. Performing the above operation on

  According to the first aspect of the present invention, it is possible for a user to register a sensor ID for identifying a sensor attached to a wheel and wheel position information in association with each other with a simple operation. As a result, for example, the air pressure of each tire can be visually displayed in association with the position information.

The figure which shows the whole structure of the sensor ID registration system which concerns on one Embodiment of this invention. The block diagram which shows the electric constitution of a sensor ID registration system. The block diagram which shows the electric constitution of a control unit. The figure explaining the positional relationship of a portable machine and a vehicle. The flowchart which shows the process which a portable device performs. The flowchart which shows the process which a sensor unit performs. The flowchart which shows the process which a control unit performs. The figure which shows the display which linked | related the air pressure and the positional information on the sensor.

  Hereinafter, a sensor ID registration system according to an embodiment of the present invention will be described with reference to the drawings.

<1. Overall configuration of sensor ID registration system>
FIG. 1 is a diagram showing an overall configuration of a sensor ID registration system 100 (hereinafter sometimes simply referred to as a registration system 100) according to an embodiment of the present invention. FIG. 2 is a block diagram showing an electrical configuration of the registration system 100. The registration system 100 includes a portable device 20 and a control unit 50 and sensor units 30a to 30d that operate as a TPMS (Tire Pressure Monitoring System) mounted on the vehicle 1, and the sensor units 30a to 30d. Is a system for registering in the control unit 50 sensor IDs for identifying the sensors 31a to 31d included in the control unit 50. The vehicle 1 is a four-wheel vehicle and includes a left front wheel FL, a right front wheel FR, a left rear wheel RL, and a right rear wheel RR. Wheels FL, FR, RL, the RR tire T _{FL respectively, T FR, T RL, T} RR is mounted, the sensor unit 30a~30d the tire T _{FL respectively, T FR, T RL, T} RR Built in. The sensor units 30a to 30d have the same structure and function, although the attached tires are different. Therefore, the sensor units 30a to 30d may be referred to as the sensor unit 30 without distinguishing 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 that locks or unlocks the door of the vehicle 1 from the outside of the vehicle 1 by wireless communication. In the present embodiment, the communication between the portable device 20 and the vehicle 1 is one-way communication in which the portable device 20 does not receive a signal 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 a signal from the sensor unit 30.

In this embodiment, the sensor units 30a to 30d are integrally attached to the air valves of the tires T _FL , T _FR , T _RL , and T _RR and are driven by a built-in battery. The sensor units 30a to 30d include communication units 32a to 32d in addition to the sensors 31a to 31d, respectively. Sensor 31a~31d are each sensor for detecting the state of the tire _{T FL, T FR, T RL} , T RR. In the present embodiment, the sensors 31a to 31d are sensors that detect air pressure, and the detection method is not limited as long as the air pressure inside each tire can be detected. For example, a strain gauge type, diaphragm type, or semiconductor type sensor 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. In addition, the communication units 32a to 32d transmit air pressure data detected by the sensors 31a to 31d and various data including sensor information described later to the I / O interface 11 (see FIG. 3) of the control unit 50.

  The sensor units 30a to 30d include control units 33a to 33d and storage devices 34a to 34d, respectively. Each of the control units 33a to 33d includes a CPU, a ROM, and a RAM. The ROM stores a program for controlling the operation of the sensor unit 30, and when the CPU reads and executes the program, 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 to 33d calculate the signal strength (dB) of the request signal RS received by the communication units 32a to 32d, respectively. The storage devices 34a to 34d are nonvolatile storage media. The storage devices 34a to 34d store sensor IDs that are information for identifying the sensors 31a to 31d, respectively. The control units 33a to 33d generate sensor information including the calculated signal strengths and the sensor IDs read from the storage devices 34a to 34d. Note 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 intensity and the sensor ID.

  The portable device 20 as an electronic key includes push buttons 21 a and 21 b, a control unit 22, and a transmission unit 23. The control unit 22 includes a CPU, a ROM, and a RAM. A program for controlling the operation of the portable device 20 is stored in the ROM, and the control unit 22 controls various processes to be described later in the portable device 20 when the CPU reads and executes the program. The transmission unit 23 is a communication interface responsible for communication with an external device, and has only a transmission function in the present embodiment. The buttons 21a and 21b are buttons for the user to unlock / lock the door 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 21 a and 21 b are pressed, and is activated as the keyless control unit 24. The keyless control unit 24 generates a signal requesting to unlock / lock the door 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 registering sensor ID information in advance as pre-processing for the pressure reduction detection processing of the tires T _FL , T _FR , T _RL , T _RR performed by the control unit 50 operating as TPMS. . The sensor ID information is information that associates the sensor IDs of the sensors 31a to 31d with the position information, and indicates where in the vehicle 1 the sensor specified by each sensor ID is attached. Note that the position information of each sensor can be expressed as wheel (that is, tire) position information. In the present embodiment, the position information is represented by any of the left front, right front, left rear, and right rear.

  The control unit 22 further operates as an RS generation unit 25 that generates the request signal RS. When the control unit 22 detects that the buttons 21a and 21b are pressed by the user, the control unit 22 executes unlocking processing, locking processing, or sensor ID information registration processing. The button for instructing execution of the sensor ID information registration processing can also be used as a button for instructing execution of the unlocking processing or locking processing. In the present embodiment, when the user presses the button 21a for 2 seconds or longer, the RS generation unit 25 is activated and the request signal RS is generated. The generated request signal RS is transmitted to each sensor unit 30 by the transmission unit 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 an electrical configuration of the control unit 50. The control unit 50 is a unit that controls various processes including a decompression detection process of the tires T _FL , T _FR , T _RL , T _RR and a registration process of sensor ID information that precedes this, and includes an I / O interface 11, a CPU 12, A ROM 13, a RAM 14, and a nonvolatile rewritable storage device 15 are provided. 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 3. The ROM 13 stores a program 4 for controlling the operation of each part of the vehicle 1. The CPU 12 virtually operates as a registration information generation unit 51, a registration processing unit 52, a registration state 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 configured by 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 the calculation of the CPU 12.

  The display device 3 can be realized in an arbitrary manner such as a liquid crystal monitor or a liquid crystal display element as long as various notifications can be displayed and transmitted to the user. Although the attachment position of the display 3 can be selected as appropriate, it is preferably provided at a position that is easily understood by the driver, for example, on the instrument panel. When the control unit 50 is connected to the car navigation system, a car navigation monitor can be used as the display unit 3, and a multi-information display (monitor) can be used as the display unit 3. It 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. Sensor ID information registration process>
Hereinafter, 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 with reference to FIGS. The sensor ID information registration process 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 a registration completion notification or an error notification (not-registered notification) is displayed on the display 3.

FIG. 4 is an overview of the positional relationship between the user (portable device 20) and the vehicle 1 when performing registration processing of sensor ID information. When starting the registration process, the user turns on the ignition switch of the vehicle 1, carries the portable device 20 and moves it outside the vehicle so that the portable device 20 exists in a predetermined area A, and in this state the button Press and hold 21a for 2 seconds or longer. Area A is an area centered on point P, and is defined in advance. Point P is a point outside the vehicle 1 and is such that the difference in the intensity of the signals received from the respective portable units 20 that the sensor units 30 respectively have is large, preferably maximum or maximum. is there. Each point in the area A is separated from the plurality of tires T _FL , T _FR , T _RL , T _RR by different distances. When there is no obstacle between the transmission side and the reception side and there is no interference with other signals, the signal strength of wireless communication is approximately inversely proportional to the square of the distance between the transmission side and the reception side. That is, the point P can be set to a position where the difference in distance from each sensor unit 30 is large, preferably the maximum or maximum, for example, a straight line connecting the FL wheel and the RL wheel, and the front end portion of the vehicle 1. It can be the intersection of tangents. The radius of area A can be determined as appropriate.

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

  In step S2, the control unit 22 activated as the RS generation unit 25 generates the request signal RS.

  In subsequent step S <b> 3, the request signal RS is transmitted by the transmission unit 23. When the request signal RS is received by the communication units 32a to 32d of the sensor units 30a to 30d, the sensor ID information registration process is taken over by the sensor units 30a to 30d.

  FIG. 6 is a diagram illustrating processing performed by the sensor unit 30. If the operation of the sensor units 30a to 30d is normal, the four sensor units 30a to 30d perform the same processing at substantially the same timing. Therefore, the sensor unit 30a will be described as an example.

The sensor unit 30a of the present embodiment is configured to transit 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, and saves power consumption. The air pressure detection mode, the air pressure data of the tire T _FL detected by the sensor 31a, the communication unit 32a transmits in a predetermined cycle to the control unit 50. In the sensor information transmission mode, the communication unit 32a transmits the sensor information generated by the control unit 33a to the control unit 50. 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 the other mode to the sensor information transmission mode is performed on condition that the request signal RS is received. In addition, the sensor information transmission mode transitions to the air pressure detection mode on condition that transmission of sensor information to the control unit 50 is completed. The conditions for the transition from the sleep mode to the air pressure detection mode, or the transition from the air pressure detection mode to the sleep mode can be set as appropriate, and various aspects are conceivable, so the description is 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 is switched from the air pressure detection mode or the 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 based on the power received by the communication unit 32a, for example. In subsequent step S34, the control unit 33a reads the sensor ID of the sensor 31a from the storage device 34a.

  In continuing step S35, the control part 33a produces | generates the sensor information which linked | related signal intensity and sensor ID. At this time, in the present embodiment, the control unit 33a acquires air pressure data via the sensor 31a, and includes the data together with the signal intensity and the sensor ID in the sensor information. In step S <b> 36, the communication unit 32 a transmits the generated sensor information to the control unit 50. If transmission of the communication part 32a is completed, it will progress to step S37 and the sensor unit 30a will change to air pressure detection mode.

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

  Next, in step S52, the registration information generation unit 51 determines whether sensor information has been received from all the sensor units 30a to 30d. If it is determined that the number of sensor information receptions 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 state notification unit 53 displays an error notification on the display device 3, and prompts the user to operate the portable device 20 again. 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 sound such as a horn or a buzzer of the vehicle 1.

  If it is determined in step S52 that the number of receptions of sensor information matches the number of sensor units 30 (YES), the process proceeds to step S55. In step S55, the registration information generation unit 51 compares the four signal intensities included in the sensor information from the four sensor units 30a to 30d, and these signal intensities are in order of increasing signal intensity (that is, correspond to each). It is determined whether or not the sensor information to be sorted can be sorted. If the difference between the four signal intensities does not exceed the predetermined threshold value and it is determined that the sensor information cannot be sorted (NO), the process proceeds to steps S53 and S54 described above. If the difference between the four signal intensities exceeds a predetermined threshold value and it is determined that the sensor information can be sorted (YES), the process proceeds to step S56.

  The distance between each point in the area A and the wheels FL, FR, RL, RR is shorter in this order. In addition, since the signal strength becomes stronger as the distance from the portable device 20 in the area A is shorter, the sorted sensor information corresponds to the wheels FL, FR, RL, RR in order from the corresponding strong signal strength. Presumed. In step S56, the registration information generation unit 51 specifies 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 the position information of the wheel and the sensor ID included in the sensor information, Is generated.

In step S57, the registration processing unit 52 registers (stores) the sensor ID information in the storage device 15. The registration processing unit 52 also associates the tire pressure data of the tires T _FL , T _FR , T _RL , T _RR included in the sensor information with the tires T _FL , T _FR , T _RL , T _RR , respectively. Register with. The air pressure data is appropriately referred to as an initial value of air pressure 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 displays a registration completion notification on the display 3, and notifies the user that the registration process of the sensor ID information has been completed. Further, 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 sound such as a horn or a buzzer of the vehicle 1.

<3. Decompression detection process>
The sensor ID information registered in the storage device 15 of the control unit 50 is referred to for the decompression detection processing of the tires T _FL , T _FR , T _RL , T _RR performed by the control unit 50. The decompression 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 decompression detection process is performed according to the following procedure. First, the sensors 31a to 31d detect the air pressures of the tires T _FL , T _FR , T _RL and T _RR to which the sensors 31a to 31d are attached, respectively, and the communication units 32a to 32d receive the air pressure data detected at a predetermined cycle. The information 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 decompression determination unit 54 collates the received sensor ID with the sensor ID information registered in the storage device 15, and detects the detected data. And sensor position information. That is, the air pressure data transmitted from the sensor units 30a to 30d is associated with the wheels FL, FR, RL, and RR, respectively. At this time, the decompression warning generation unit 55 can display the current tire air 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 tire air pressure (in the example of FIG. 8, the unit is kPa) is displayed near the graphic simulating each tire included in the graphic simulating the vehicle 1. Graphics. Such a display is not always displayed, but can be displayed on the display 3 in response to a request from the user.

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

  If the above determination of decompression is normal for all tire air pressures, the decompression determination unit 54 repeats the above-described processing. On the other hand, if it is determined that the pressure is reduced for at least one of the tires, the pressure reduction warning generation unit 55 generates a warning signal for notifying the pressure reduction, and generates a pressure reduction alarm via an external device or the like. As long as the alarm can notify the user that the decompression is occurring, the mode is not limited, and sounds such as horn and buzzer, blinking of the lamp, display of icons and character information on the display 3, and the like can do. Further, in place of or in addition to the above, in the graphic of the vehicle 1 in FIG. 8 described above, means such as a reverse display, a large display, or a blinking of the color of the number of air pressure of the decompression tire may be used. .

<4. Features>
In the above-described embodiment, the user only operates the portable device 20 once in the predetermined area A (more specifically, by pressing the button 21a once), the sensor IDs of all the sensors 31a to 31d are obtained. And can be registered in the vehicle 1 in association with wheel position information. That is, there is no need to manually set the position information of the wheel in advance in the portable device 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 intend to register the correspondence between the wheel position and the sensor ID by mistake. Furthermore, it is not necessary to install new equipment in the vehicle, and the in-vehicle equipment and portable device of the existing keyless system can be used, which is excellent in terms of cost. Further, in the decompression detection process of the vehicle 1, based on the registered sensor ID information, the current air pressure of each tire can be visually displayed in association with the position information. With this configuration, the user can easily grasp the state of the tire air pressure, and can quickly notice the occurrence of decompression.

<5. Modification>
As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible unless it deviates from the meaning. For example, the following changes can be made. Moreover, the gist of the following modifications can be combined as appropriate.

<5-1>
The user may press the button 21a twice or more times. In this case, the control units 33a to 33d of the sensor unit 30 can calculate the average value of the signal intensities received a plurality of times and include it in the sensor information. The user may press the button 21a in two or more different predetermined areas. For example, when the areas A1 and A2 are set, the user may press the button 21a one or more times in each of the areas A1 and A2. If it does in this way, the estimation accuracy of the wheel position information by registration information generation part 51 of control unit 50 will improve, and it is expected that the reliability of registration system 100 will become higher.

<5-2>
In the keyless system of the above embodiment, the communication between the vehicle 1 and the portable device 20 and the communication between the sensor unit 30 and the portable device 20 are unidirectional. However, the present invention can also be applied to a system in which at least one of communication between the vehicle 1 and the portable device 20 and communication between the sensor unit 30 and the portable device 20 is bidirectional. For example, this is a case where the portable device 20 is a communication terminal equipped with a higher function computer such as a smartphone or a smart watch. In this case, the notification generated by the registration state notification unit 53 may be transmitted to the portable device 20. The portable device 20 can notify the user of the registered state by a message, an icon on the display device included in the portable device 20, or a blinking pattern of the lamp, and / or notify the registered state to the user by making a notification sound. can do. In this way, the user can know the completion or error of the registration process via the portable device 20 without checking the display 3 of the vehicle 1. Alternatively, the control unit 22 of the portable device 20 instead of the control unit 50 may include a registration information generation unit 51, a registration processing unit 52, and a registration state notification unit 53. In this case, the portable device and the registration control device are integrated. 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>
In the said embodiment, although the sensors 31a-31d were air pressure sensors, it is not restricted to the example of this. For example, instead of or in addition to this, the sensors 31a to 31d may include a temperature sensor. The position to be attached with the sensor 31a~31d the tire _{T FL, T FR, T RL} , is not limited to the air valve of the T _RR. If it is possible to detect the air pressure in the tire, the sensors 31a to 31d may be attached to the back surface of the tread of the tire, for example, or may be fixed to the wheel with a belt.

<5-4>
The notification of the registration state is not limited to the example described above, and can be transmitted to the user in various modes. For example, the headlight of the vehicle 1 may be turned on with a lighting pattern corresponding to the registration state, and the registration state may be notified. Moreover, the notification by the sound via the speaker of the vehicle 1 is also considered. Further, in the error notification, the user should confirm that there is no obstacle between the portable device 20 and the vehicle 1 and change the rotational position where the tire stops so that the user can remove the cause of the error. You may include content that prompts you.

DESCRIPTION OF SYMBOLS 1 Vehicle 100 Sensor ID registration system 3 Indicator 20 Portable machine 21a (Unlock) button 23 Transmitter 25 RS production | generation part 30a-30d Sensor unit 31a-31d Sensor 32a-32d Communication part 33a-33d Control part 34a-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 Left Front Wheel FR Right Front Wheel RL Left Rear Wheel RR Right Rear Wheel T _FL Tire (Left Front)
T _FR tire (right front)
T _RL tire (left rear)
T _RR tire (right rear)

Claims (9)

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 operation;
A registration control device provided separately or integrally with the portable device;
With
Each sensor unit is
A sensor for detecting a state of a tire mounted on the wheel;
A communication unit that receives the request signal from the portable device;
A control unit that calculates a signal strength of the request signal and generates sensor information including the signal strength and a sensor ID for identifying the sensor;
The communication unit transmits the sensor information to the registration control device,
The registration control device
A sensor information receiving unit for receiving the sensor information from each sensor unit;
Based on the signal strength included in the sensor information, the 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 position information;
A registration processing unit for registering the sensor ID information;
Including a sensor ID registration system. 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 normally completed and a registration incomplete notification indicating that the registration processing has not been normally completed. In addition,
The sensor ID registration system according to claim 1. The sensor detects at least one of air pressure and temperature of the tire;
The sensor ID registration system according to claim 1 or 2. The sensor information includes information on the state of the tire detected by the sensor.
The sensor ID registration system according to any one of claims 1 to 3. The portable device is a key of the vehicle;
The sensor ID registration system according to any one of claims 1 to 4. The portable device is a portable communication terminal.
The sensor ID registration system according to any one of claims 1 to 4. The registration control device is mounted on the vehicle.
The sensor ID registration system according to any one of claims 1 to 6. The registration control device is a portable communication terminal.
The sensor ID registration system according to any one of claims 1 to 6. Providing a sensor ID registration system according to any one of claims 1 to 8;
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.