JP2015131615A - tire valve ID registration system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tire valve ID registration system that can quickly complete a tire valve ID registration of own vehicle to a receiver.SOLUTION: When registering valve IDs of tire valves 4 to a TPMS (Tire Pressure Monitoring System) receiver 12, it is confirmed whether the received valve IDs (a group of valve IDs) are known IDs that have been registered to the TPMS receiver 12. If the received valve IDs are the known IDs, the valve IDs that have been registered to the TPMS receiver 12 are used continuously as the IDs of own vehicle's tires.

Description

  The present invention relates to a tire valve ID registration system for registering a tire valve ID in a receiver as an ID of a vehicle tire.

  Conventionally, as one function of a tire pressure monitoring system, a tire valve ID registration system for automatically registering a tire valve ID (valve ID) as a vehicle tire ID in a receiver without using a trigger generator such as an initiator. Is well known (see Patent Document 1). If the initiator is not required for registering the valve ID in the receiver, the number of components mounted on the vehicle can be reduced.

Special table 2011-527971 gazette

  In this type of tire valve ID registration system, for example, when the determination of the valve ID is started after the vehicle starts running, if the valve ID cannot be determined as early as possible, the monitoring of the tire air pressure is hindered. Therefore, there was a need to complete the valve ID early in the receiver.

  An object of the present invention is to provide a tire valve ID registration system capable of completing the registration of a tire valve ID of a host vehicle in a receiver at an early stage.

  A tire valve ID registration system that solves the above problems is necessary for transmitting a radio wave including tire air pressure data from the tire valve of each tire, and for monitoring the air pressure of each tire by receiving the radio wave by a receiver of a vehicle body. In the configuration in which the ID of the tire valve is registered in the receiver, a known determination unit that determines whether the received valve ID is a known ID registered in the receiver, and a determination by the known determination unit And a known ID use permission unit for setting whether or not the known ID can be used based on the result.

  According to this configuration, when executing the operation of registering the valve ID in the receiver, it is confirmed whether or not the received valve ID (group of valve IDs) is a known ID registered in the receiver so far. If the received valve ID is a known ID, the valve ID registered in the receiver is continuously used as the ID of the vehicle tire. Therefore, the registration of the valve ID can be completed without performing the registration operation for the unknown ID each time, that is, the registration operation that imposes a time-consuming fine determination. This is advantageous for shortening the time required for.

  In the tire valve ID registration system, the known determination unit performs not only whether the received valve ID is a known ID but also a confirmation determination whether the known ID satisfies a condition that can be handled as a vehicle ID. The known ID use permission unit preferably determines the known ID as the own vehicle ID if the received valve ID is a known ID and satisfies the confirmation determination. According to this configuration, not only whether or not it is a known ID, but also whether or not the condition for importing the known ID is satisfied is confirmed, so that the received known ID is registered more correctly in the receiver. Is advantageous.

  In the tire valve ID registration system, it is preferable that the confirmation determination is a process more simplified than an unknown ID registration operation executed when an unknown ID is registered in the receiver. According to this configuration, since the confirmation determination is a simple process, this can be efficiently performed when determining the validity of the known ID.

  In the tire valve ID registration system, the confirmation determination is a process of confirming that the receiver receives the known ID transmitted from the tire valve in a state where an acquisition condition according to traveling is satisfied. preferable. According to this configuration, when the known ID is received, if it can be confirmed that the vehicle is running, the received known ID is captured as the ID of the own tire. It is not necessary to acquire the valve ID to be obtained as the known ID of the vehicle tire.

  In the tire valve ID registration system, it is preferable that the confirmation determination is a process of confirming that the received known ID can be continuously received. According to this configuration, when the known IDs of the vehicle tires can be acquired, it is confirmed whether or not they can be received once again, and the process proceeds to the final determination. Therefore, it is advantageous to correctly register the known ID by the receiver.

  In the tire valve ID registration system, the tire valve ID registration system includes a tire ID collection unit that collects candidate IDs of the vehicle tire in the first phase, and when the known ID is included in the candidate ID, the determination by the known determination unit Is executed, and when the known ID is not included in the candidate ID, the candidate ID is narrowed down to the required number in subsequent phases, and the unknown valve ID of the vehicle is identified from the unknown ID. Preferably, an ID registration operation is performed. According to this configuration, candidate IDs are collected in the first phase of the valve ID registration operation. By checking the valve ID collected at this time, it is determined whether or not the received valve ID is a known ID. Determined. Therefore, it is not necessary to provide a separate routine for collecting known IDs, and the processing can be made more efficient.

  According to the present invention, it is possible to complete the registration of the tire valve ID of the vehicle in the receiver at an early stage.

The lineblock diagram of the tire valve ID registration system of one embodiment. The sequence diagram which shows the operation | movement logic of a gravity detection part. The sequence diagram which shows the transmission mode of a tire valve. Explanatory drawing of the operation | movement which a tire valve takes when a vehicle switches from a stop to driving | running | working. Explanatory drawing of the operation | movement which a tire valve takes when a vehicle switches from driving | running | working to a stop. Explanatory drawing which shows the operation logic when registering the tire ID of the own vehicle into a receiver. The flowchart which shows ID registration operation | movement using known ID determination.

Hereinafter, an embodiment of a tire valve ID registration system will be described with reference to FIGS.
As shown in FIG. 1, the vehicle 1 includes a tire pressure monitoring system (TPMS) 3 that monitors the air pressure and the like of each tire 2 (2 a to 2 d). The tire pressure monitoring system 3 includes tire valves 4 (4a to 4d) attached to the tires 2a to 2d of the traveling tire. The tire valve 4 is a tire valve sensor in which a tire plug is provided with a sensor and a communication function. The tire pressure monitoring system 3 transmits a radio wave (valve radio wave) Sva associated with at least the pressure data and ID of the tire 2 from the tire valve 4 to the vehicle body 5, and the air pressure of each tire 2 a to 2 d in the vehicle body 5 is transmitted. Monitor.

  The tire valve 4 detects a controller 6 that controls the operation of the tire valve 4, a pressure detection unit 7 that detects tire air pressure, a temperature detection unit 8 that detects the temperature of the tire 2, and gravity that occurs in the tire valve 4. And a transmission antenna 10 that enables radio wave transmission from the tire valve 4. A valve ID is written and stored in the memory 11 of the controller 6 as a unique ID of each tire valve 4. The pressure detector 7 is preferably a pressure sensor, for example. The temperature detector 8 is preferably a temperature sensor, for example. The gravity detector 9 is preferably an acceleration sensor (G sensor), for example. The transmission antenna 10 is preferably capable of transmitting a radio wave of, for example, a UHF (Ultra High Frequency) band.

  The vehicle body 5 includes a receiver (hereinafter referred to as a TPMS receiver 12) that monitors the air pressure of each tire 2 by receiving the radio wave Sva transmitted from each tire valve 4. The TPMS receiver 12 includes a tire pressure monitoring ECU (Electronic Control Unit) 13 that controls the operation of the TPMS receiver 12 and a receiving antenna 14 that enables radio waves to be received by the TPMS receiver 12. The valve ID acquired from each tire valve 4 is written and stored in the memory 15 of the tire pressure monitoring ECU 13. The TPMS receiver 12 is connected to a display unit 16 that displays the monitoring result of the air pressure. It is preferable that the display part 16 is installed in the instrument panel in a vehicle, for example.

  When the reception antenna 14 receives the radio wave Sva transmitted from the tire valves 4a to 4d at a certain timing, the TPMS receiver 12 collates the valve ID in the radio wave Sva, and if the valve ID collation is established, Check the pressure data (air pressure data). If the air pressure is equal to or lower than the low pressure threshold, the TPMS receiver 12 displays on the display unit 16 that the tire air pressure is low. The TPMS receiver 12 performs the tire air pressure determination for each received radio wave Sva, and sequentially monitors the air pressure of the tires 2a to 2d.

  The tire pressure monitoring system 3 includes a tire valve ID registration function (tire valve ID registration system 17) that automatically registers the ID of each tire valve 4 in the TPMS receiver 12 as the ID of the vehicle tire. The tire valve ID registration system 17 can register each valve ID of the tire 2 in the TPMS receiver 12 without using a predetermined tool. The tire valve ID registration system 17 also registers the TPMS receiver 12 with only the valve ID without identifying the mounting position of the tire 2. The tire 2 to be registered is not limited to a traveling tire (tires 2a to 2d) but may include a spare tire. The traveling tire is a tire that is connected to the front, rear, left, and right axles 18 of the vehicle body 5 and rotates during traveling.

  FIG. 2 illustrates the operation logic of the gravity detection unit 9. The gravity detection unit 9 detects gravity (gravity acceleration) according to the rotation of the tire 2 and detects acceleration based on centrifugal force generated mainly in the tire valve 4 when the tire rotates. The tire valve 4 detects whether the vehicle 1 is “running” or “stopped” based on the gravity signal detected by the gravity detector 9 and the rotational speed of the tire 2, that is, the vehicle speed. Is possible.

  The gravity detection unit 9 repeatedly detects the gravity generated in the tire valve 4 at a certain monitoring timing. The gravity monitoring interval Ta is preferably “16 s”, for example. When the tire valve 4 is running, the gravity monitoring timing is set to the radio wave transmission timing, and when the vehicle is running, the transmission interval “Ta × K1” obtained by multiplying the gravity monitoring interval Ta by K1 is set to the radio wave transmission timing and is stopped. The transmission interval “Ta × K2” obtained by multiplying the gravity monitoring interval Ta by K2 (> K1) is set as the radio wave transmission timing. That is, the transmission cycle of the radio wave Sva is set to be short during traveling, and the transmission cycle of the radio wave Sva is set to be long while the vehicle is stopped. The coefficients K1 and K2 may be variable according to, for example, the vehicle speed, the stop time of the vehicle 1, and the like.

  FIG. 3 illustrates a specific example of the frequency of radio wave transmission of the tire valve 4. The tire valve 4 takes a plurality of operation modes according to the situation. Moreover, it is preferable that the tire valve 4 operates in an operation mode corresponding to the stop time until the tire 2 is switched from the stop to the rotation. The “stop” of the vehicle 1 here means “parking” in which the engine 1 is stopped by stopping the engine, “stop” in which the vehicle 1 is stopped while the engine is turned on, “low speed running (for example, less than 5 km / h) ) ”.

  More specifically, the tire valve 4 can take three modes: a “first transmission mode” for high frequency transmission, a “second transmission mode” for medium frequency transmission, and a “third transmission mode” for low frequency transmission. preferable. The first transmission mode is a mode that enters a condition that the stop time up to that time is equal to or longer than a predetermined time when shifting from stop to running, and the number of transmissions of the radio wave Sva is “high frequency”. The second transmission mode is a mode that enters a condition that the stop time up to that time is less than a predetermined time when shifting from stop to running, and the number of transmissions of the radio wave Sva is “medium frequency”. The third transmission mode is a mode that is entered when the vehicle 1 is stopped, and the number of transmissions of the radio wave Sva is “low frequency”. For example, when the vehicle 1 frequently repeats running and stopping, low frequency transmission and medium frequency transmission are repeated. When the vehicle 1 starts running after a long time stop, the tire valve 4 is set to high-frequency transmission.

  The tire valve 4 transmits the vehicle state information Dcr determined based on the detection signal of the gravity detection unit 9 in the radio wave Sva from the transmission antenna 10. The vehicle state information Dcr is information indicating the rotation state of the tire 2 now. Therefore, each radio wave Sva is preferably a signal including a valve ID, vehicle state information Dcr, pressure data, and the like. The vehicle state information Dcr includes, for example, travel information Ddr indicating that the vehicle 1 is traveling, stop information Dst indicating that the vehicle 1 is stopped, and the like. The travel information Ddr and the stop information Dst are preferably constructed from, for example, several bits of data. In this case, the travel information Ddr is “travel bit”, and the stop information Dst is “stop bit”.

  FIG. 4 illustrates the operation of the tire valve 4 when the vehicle 1 is switched from stop to running. In this case, the tire valve 4 recognizes that the vehicle 1 has been switched to traveling based on the change in the output of the gravity detection unit 9 at the first gravity monitoring timing after switching to traveling. Send Sva. That is, the tire valve 4 transmits the radio wave Sva within a certain time corresponding to the monitoring interval Ta when the vehicle 1 is switched from the stop to the travel. In this example, the radio wave transmission timing of the tire valve 4 is set to the gravity monitoring timing, and the gravity monitoring interval Ta is set to “16 s”. Therefore, when the vehicle 1 is switched from the stop to the running, at least “16 s”. The tire valve 4 transmits the radio wave Sva.

  FIG. 5 illustrates the operation of the tire valve 4 when the vehicle 1 is switched from running to stop. In this case, the tire valve 4 recognizes that the vehicle 1 has been switched to non-running based on the change in the output of the gravity detector 9 at the first gravity monitoring timing after switching to the stop. The radio wave Sva is transmitted. That is, the tire valve 4 transmits the radio wave Sva within a certain time corresponding to the gravity monitoring interval Ta when the vehicle 1 is switched from running to stop. Also at this time, the tire valve 4 transmits the radio wave Sva within at least “16 s”.

  As shown in FIG. 1, the tire valve ID registration system 17 repeats a registration operation that is independent for each phase for each phase, thereby identifying a valid valve ID and registering it in the TPMS receiver 12. A registration unit 19 is preferably provided. The ID registration unit 19 may be provided in the tire pressure monitoring ECU 13, for example. The ID registration unit 19 preferably identifies the valve IDs by collecting candidate IDs that are candidates for registration in the first phase, and narrowing down the candidate IDs to the required number in subsequent phases.

  The ID registration unit 19 preferably includes a tire ID collection unit 20 that collects valve ID candidates to be registered by receiving the valve IDs transmitted from the respective tire valves 4a to 4d. The tire ID collection unit 20 divides a certain time zone, for example, and acquires a valve ID that can be received during the predetermined time as a candidate ID. The ID registration unit 19 narrows down the ID by checking whether or not the collected valve ID candidate IDs can be continuously received, and thereby determines the tire ID determination unit 21 that determines the valve ID to be registered. It is preferable to provide. In the case of this example, it is assumed that the tires to be registered are both running tires and spare tires. When the tire ID determination unit 21 narrows down the candidate IDs to the required number, the tire ID determination unit 21 determines these valve IDs as the IDs of the vehicle tire.

  The tire valve ID registration system 17 includes a known determination unit 22 that determines whether or not the valve ID received in the registration mode is a known ID registered in the TPMS receiver 12. The known determination unit 22 is preferably provided, for example, in the tire air pressure monitoring ECU 13. Even if the ID registration operation is executed by the TPMS receiver 12, the known determination unit 22 leaves the valve ID that has been written in the memory 15 until then. It is preferable that the known determination unit 22 not only determines whether or not the received valve ID is a known ID, but also performs a determination determination whether or not the known ID satisfies a condition for handling the vehicle ID as a vehicle ID. The confirmation determination is preferably a simplified determination with respect to the unknown ID registration operation executed when the unknown ID is registered in the TPMS receiver 12.

  The tire valve ID registration system 17 includes a known ID use permission unit 23 that executes a process for determining whether or not to reuse a known ID based on the determination result of the known determination unit 22. When the known determination unit 22 determines that the received known ID is the valve ID of the host vehicle, the known ID use permission unit 23 registers the known ID as the host vehicle ID in the TPMS receiver 12 (permits the use of the ID). ) Is preferable.

Next, operation | movement of the tire valve ID registration system 17 is demonstrated using FIG.6 and FIG.7.
FIG. 6 shows the operation logic executed when registering the ID of the vehicle tire in the TPMS receiver 12. When the registration mode switching operation is executed, the TPMS receiver 12 enters a “registration mode” and starts a valve ID registration operation. At this time, first, the tire ID collection unit 20 monitors the radio wave Sva that can be received by the reception antenna 14 of the TPMS receiver 12 in a temporary registration period (one example is 2 minutes) N of a predetermined time width, and collects the valve ID. That is, the tire ID collection unit 20 temporarily registers the valve ID that can be received in the memory 15 of the TPMS receiver 12 during the temporary registration period N, which is the “first phase” of the ID registration operation of the tire 2. The valve ID that is a registration candidate is written in the memory 15 with a “flag as a tire ID candidate” set. The temporary registration period N is preferably set to a time width in which the radio wave Sva can be received with a high probability that is equal to or higher than a certain theoretical value in consideration of the radio wave reception rate in the tire valve 4, for example.

  If the tire ID collecting unit 20 can receive the valve ID even once in the temporary registration period N, the tire ID collecting unit 20 temporarily registers the valve ID in the memory 15 as a candidate ID of the vehicle tire. Of course, even when a plurality of the same valve IDs are received, the tire ID collection unit 20 temporarily registers one of them as a candidate ID of the vehicle tire in the memory 15.

  After the completion of provisional registration, the tire ID determination unit 21 starts narrowing down candidate IDs in a main registration period (for example, 2 minutes) M having a predetermined time width. At this time, the tire ID determination unit 21 confirms whether or not the temporarily registered candidate ID can be received again in the first main registration period M that is the “second phase” of the ID registration operation of the tire 2. In other words, the tire ID determination unit 21 narrows down the candidate IDs by excluding the temporarily registered candidate IDs that were not received again in the first main registration period M. The main registration period M is preferably set separately for the temporary registration period N, for example.

  The valve IDs excluded from the registration candidates are excluded from the candidates by setting a “flag not to be a tire ID candidate” although they are left in the memory 15. For example, when there is an ID that is not received in the temporary registration period N and is received for the first time in the main registration period M, such as “ID13”, this may be added to the first main candidate. If the number of valve IDs has been narrowed down to a predetermined number (for example, a total of five traveling tires and spare tires) when the first main registration period M has expired, the tire ID determination unit 21 End the operation.

  On the other hand, the tire ID determination unit 21 does not narrow down the number of valve IDs to a predetermined number (for example, a total of five traveling tires and spare tires) even if the first main registration period M is up. Re-execute this registration. That is, the tire ID determination unit 21 continues the narrowing down in the second main registration period L that is the “third phase” of the ID recording operation of the tire 2. For example, even if there is an ID received again in the second main registration even though it is excluded in the first main registration, such as “ID19”, this is not restored by repeated main registration. Then, the tire ID determination unit 21 repeats the main registration for each phase until the valve ID can be narrowed down to a predetermined number.

  When the tire ID determination unit 21 can narrow down the candidate IDs to a predetermined number of vehicle tires (for example, a total of 5 tires and spare tires), these valve IDs are stored as “vehicle tire IDs”. 15, the valve ID registered in the TPMS receiver 12 is updated. It is preferable that the TPMS receiver 12 executes the ID registration operation of the own vehicle tire every time the ignition switch of the vehicle 1 is turned on and the vehicle 1 starts to travel.

  FIG. 7 shows a flowchart of the registration logic of the known ID. The flowchart of FIG. 6 is executed when the previously registered valve ID has been written in the memory 15 when the registration mode is entered. This flowchart is preferably executed every time the registration mode is entered.

In step 101, the ID registration unit 19 performs a temporary registration operation for collecting valve IDs that can be received in the temporary registration period N.
In step 102, the known determination unit 22 determines whether or not the valve ID (candidate ID) received by the TPMS receiver 12 during the temporary registration period N is a known ID. Specifically, it is confirmed whether there is a matching valve ID remaining in the memory 15 of the TPMS receiver 12 for a group of candidate IDs that can be acquired (for example, four wheels of a running tire). By doing so, the presence or absence of the known ID is confirmed. In this step, if the known IDs are not necessary (for example, four wheels of the running tire), the process proceeds to step 103. If the known IDs are necessary, the process proceeds to step 104.

  In step 103, the ID registration unit 19 executes an unknown ID registration operation for registering an unknown ID in the TPMS receiver 12. The unknown ID registration operation is a main registration operation in which the above-described candidate IDs are narrowed down by repeating the phase. That is, the candidate ID is narrowed down in the first main registration period M, and if the candidate ID cannot be specified there, the process proceeds to the second main registration period L and continues to be narrowed down until the candidate ID is narrowed down to the required number. Is repeated. If the valve ID of the vehicle can be specified, the valve ID is registered in the TPMS receiver 12.

  In step 104, the known determination unit 22 determines whether or not the TPMS receiver 12 has received the known ID transmitted from the tire valve 4 in a state where the acquisition condition according to traveling is satisfied as the first confirmation determination. To do. “Satisfying the acquisition condition” preferably means that, for example, “travel information Ddr” is included in the received valve ID. Further, “satisfying the acquisition condition” may mean that the radio wave Sva can be received with the number of frames in an operation mode according to traveling, for example. If the known ID satisfies the acquisition condition, the process proceeds to step 105. If the known ID does not satisfy the acquisition condition, the process returns to step 101, and the ID registration operation of the tire 2 is performed again.

In step 105, the known determination unit 22 determines the validity of the known ID as the second confirmation determination. For example, the following two examples can be used to determine the validity of the known ID.
(I) Determining whether a set of known IDs (four wheels of running tires) received in the temporary registration phase (first phase) can be received in the subsequent phases (after the second phase) as well. (II) Execute a phase for collecting valve IDs, and end the phase when all the valve IDs that are the same as the known IDs have been received (a predetermined number of wheels are acceptable). In step 106, the known determination unit 22 It is determined whether or not the determination of the validity of the ID has been correctly completed. That is, it is determined whether or not reconfirmation as to whether the known ID is the ID of the vehicle tire has been successfully completed. If the determination of the validity of the known ID has been correctly completed, the process proceeds to step 107. If the determination of the validity of the known ID has not been correctly completed, the process returns to step 101, and the tire 2 ID registration operation is re-executed. To do. Note that it is preferable to forcibly terminate the process if the ID of the own vehicle tire (including the known ID) cannot be specified within the time limit even if the ID registration operation is repeated many times.

  In step 107, the known ID use permission unit 23 determines the known ID that can be specified by the registration operation of the known ID in the memory 15 of the TPMS receiver 12 as the own vehicle ID. As a result, the valve ID registered until immediately before in the TPMS receiver 12 can be immediately determined in the TPMS receiver 12 as the ID of the vehicle tire without taking time.

According to the configuration of the present embodiment, the following effects can be obtained.
(1) When registering the valve ID of the tire valve 4 in the TPMS receiver 12, it is determined whether or not the received valve ID (group of valve IDs) is a known ID that has been registered in the TPMS receiver 12 until now. If the received valve ID is a known ID, the valve ID registered in the TPMS receiver 12 is continuously used as the ID of the vehicle tire. Therefore, it is possible to complete the registration of the valve ID without executing a registration operation for unknown IDs every time, that is, a registration operation (unknown ID registration operation) that requires time-consuming fine determination. Therefore, the time required for registering the valve ID can be shortened.

  (2) The known determination unit 22 performs not only determination whether the received valve ID is a known ID, but also confirmation determination whether the known ID satisfies a condition that can be handled as the vehicle ID. If this confirmation determination is satisfied, the known ID is determined as the vehicle ID. Therefore, when registering the known ID in the TPMS receiver 12, not only whether or not the known ID is a known ID but also whether the known ID is satisfied or not is confirmed. It is advantageous to register with the TPMS receiver 12 more correctly.

  (3) Confirmation determination (first confirmation determination, second confirmation determination) is a process that is more simplified than the unknown ID registration operation. Therefore, in determining the validity of the known ID, this can be performed in a short time, so that the known ID can be determined efficiently.

  (4) The confirmation determination (first confirmation determination) is performed by the TPMS receiver 12 in a state where the known ID transmitted from the tire valve 4 satisfies the acquisition condition according to traveling (such as the traveling bit of the radio wave Sva is set). It was set as the process which confirms receiving. Therefore, for example, the valve ID transmitted from the tire 2 left in the vicinity after the tire replacement need not be acquired as the known ID of the own vehicle tire.

  (5) The confirmation determination (second confirmation determination) is a process of confirming that the received known ID (for example, one set of known IDs) can be continuously received. In this case, even if the known IDs of the vehicle tires can be acquired, the process proceeds to the final determination when they can be received again. Therefore, it is advantageous to correctly register the known ID by the TPMS receiver 12.

  (6) The known ID is collected in the temporary registration operation that is the first phase of the ID registration operation. For this reason, it is not necessary to provide a separate routine for collecting known IDs, so that processing can be performed efficiently.

Note that the embodiment is not limited to the configuration described so far, and may be modified as follows.
・ Known IDs are not required for all wheels. For example, it is possible to specify only a few IDs with known IDs and specify the rest by unknown ID registration operation.

-You may give a time limit to the use of known IDs. That is, the use of the known ID may be permitted only when the elapsed time from the start of the ID registration operation is within a predetermined time.
The trigger for switching the TPMS receiver 12 to the registration mode can employ various modes, whether directly or indirectly.

-The operation mode which the tire valve 4 takes can be changed into various aspects. Further, the types of operation modes are not limited to three, and can be appropriately changed to two or four or more.
-The time of each phase may be the same fixed time length.

  The first phase of tire determination (temporary registration period N) is, for example, various traveling conditions such that the first time is 0 to 10 km / h and the second time is 10 to 20 km / h. The phase time may be variable according to the above.

The first phase of tire determination (temporary registration period N) may be terminated when the total number of candidate IDs reaches a predetermined number, for example.
The main registration process is not limited to the process of narrowing down candidate IDs by repeating phases. For example, the valve ID that can be initially received a predetermined number of times in one phase may be determined as the valve ID of the vehicle.

In the main registration process, for example, when these IDs have been received a predetermined number of times from the stage where the valve IDs are narrowed down to the required number, these may be determined as the valve IDs of the own vehicle.
The determination of the valve ID (known ID, unknown ID) may be performed a plurality of times after the ignition switch is switched from off to on.

  -Radio waves Sva transmitted multiple times in high-frequency transmission and medium-frequency transmission are not limited to having the same signal content. For example, signal information differs between the first radio wave Sva and the second and subsequent radio waves Sva. , May be changed as appropriate.

  The acquisition condition according to traveling is not limited to the fact that a traveling bit is set in the radio wave Sva or the radio wave Sva takes the number of frames according to the traveling, for example, the vehicle speed that can be recognized on the vehicle body 5 side is a predetermined value or more. It is possible to change to other conditions.

The confirmation determination (first and second confirmation determination) can be changed to various modes as long as it is a process that can confirm the validity of the valve ID.
The known ID determination operation is not limited to being incorporated as one process of the ID registration operation performed in the flow of the temporary registration period N → the main registration periods M and L. For example, it is first determined whether or not the received valve ID is a known ID. If the received ID is an unknown ID, an ID registration operation in the flow of the temporary registration period N → the main registration periods M and L is performed thereafter. You may make it perform.

-When the known IDs have been received as many as the required number of wheels (four for traveling wheels), these known IDs may be determined as the IDs of the vehicle tires.
The ID registration operation can be changed to various modes as long as it is a process composed of a plurality of phase breaks.

  The ID registration operation is not limited to the process of specifying the valve ID by phase separation, and can be changed to various modes as long as the valve ID of the own vehicle can be specified.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle, 2 (2a-2d) ... Tire, 4 (4a-4d) ... Tire valve, 5 ... Vehicle body, 12 ... Receiver (TPMS receiver), 17 ... Tire valve ID registration system, 20 ... Tire ID collection , 21... Tire ID determination unit, 22. Known determination unit, 23. Known ID use permission unit, Sva.

Claims (6)

It is necessary to transmit a radio wave including tire pressure data from the tire valve of each tire, and to monitor the air pressure of each tire by receiving the radio wave with a receiver of the vehicle body. In the tire valve ID registration system to be registered,
A known determination unit for determining whether or not the received valve ID is a known ID registered in the receiver;
A tire valve ID registration system comprising: a known ID use permission unit that sets whether or not the known ID can be used based on a determination result of the known determination unit. The known determination unit executes not only whether or not the received valve ID is a known ID, but also a confirmation determination whether or not the known ID satisfies a condition that can be handled as a vehicle ID.
2. The tire valve according to claim 1, wherein the known ID use permission unit determines the known ID as a vehicle ID if the received valve ID is a known ID and satisfies the confirmation determination. ID registration system. 3. The tire valve ID registration system according to claim 2, wherein the confirmation determination is a process more simplified than an unknown ID registration operation performed when an unknown ID is registered in the receiver. 4. The confirmation determination is a process of confirming that the receiver receives the known ID transmitted from the tire valve in a state where an acquisition condition according to traveling is satisfied. The tire valve ID registration system described in 1. The tire valve ID registration system according to any one of claims 2 to 4, wherein the confirmation determination is a process of confirming that the received known ID can be continuously received. A tire ID collecting unit for collecting candidate IDs of the vehicle tires in the first phase;
When the known ID is included in the candidate ID, the determination by the known determining unit is executed, and when the known ID is not included in the candidate ID, the necessary number of candidate IDs is included in the subsequent phases. The tire valve ID according to any one of claims 1 to 5, wherein an unknown ID registration operation for specifying the valve ID of the host vehicle from among the unknown IDs is performed by narrowing down to a specific value. Registration system.