JP2003191730A - Air pressure alarm system for automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To restrain tire identification information of another vehicle from being erroneously registered as tire identification information of own vehicle. <P>SOLUTION: This alarm system is provided with air pressure sensors 6-9, an alarm 30 for notifying an air pressure condition in a tire, and a control unit 20 for notifying the air pressure condition in the tire to the alarm 30. Each of the air pressure sensors 6-9 is provided with a transmitter 6e for transmitting the different tire identification information set in the each air pressure sensor, and the control unit 20 is provided with a receiver 20a for receiving the information transmitted from the transmitter 6e, a tire identification information registering means 20i for registering the tire identification information of high reception frequency out of the received different tire identification informations as the tire identification information of own vehicle, and a tire identification information registration regulating means 20j for regulating the registration by the tire identification information registering means, under a prescribed registration-regulated condition. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile air pressure alarm device, and more particularly to an automobile air pressure alarm device capable of suppressing the tire identification information of another vehicle from being mistakenly registered as the tire identification information of the own vehicle. It is a thing.

[0002]

2. Description of the Related Art Conventionally, it is known to detect the air pressure of each tire of a vehicle and to alert the user of the detected tire air pressure as a tire air pressure state. For example, an air pressure sensor provided in each tire performs wireless transmission of a tire air pressure detection signal detected by a control unit for alarm control including a receiver, and the control unit transmits the wirelessly transmitted tire air pressure detection signal. Is received, an insufficient tire air pressure state is determined based on the deviation between the received tire air pressure detection signal and the previously stored proper air pressure, and an alarm is issued. By the way, since the receiver may mistakenly receive a tire pressure detection signal from another vehicle, it is determined whether the transmitted tire pressure detection signal is the own vehicle's or another vehicle's. Need to identify. Therefore, in Japanese Patent No. 3061047, the tire identification information is wirelessly transmitted from the air pressure sensor to the receiver of the control unit, and among the tire identification information received by the receiver, the tire of the own vehicle is received from the one having the highest reception frequency. According to such a prior art disclosed that the tire identification information for the number of tires is registered in the control unit as the tire identification information of the own vehicle, the transmitter of the tire mounted on the own vehicle is most suitable for the receiver. Since the reception frequency will be high in the near future, the tire identification information of the own vehicle can be surely registered.

[0003]

However, even in the prior art as described above, when another vehicle approaches the own vehicle for a relatively long time, the tire of the other vehicle is erroneously attached to the own vehicle. There is a problem that the tire identification information is registered as the tire. In other words, the transmitter is provided for each air pressure sensor, whereas when the receiver is shared by one receiver, the receiver is required to reliably receive the tire air pressure detection signals from all the air pressure sensors. Needs to have a high reception sensitivity and a wide reception direction. However,
Depending on variations in reception sensitivity and reception direction, the frequency of reception of the air pressure detection signal from the air pressure sensor of another vehicle may be higher than the frequency of reception of the air pressure detection signal from the air pressure sensor provided in the tire of the vehicle. Such a problem is not a problem because the reception frequency does not increase if the approach of the other vehicle to the own vehicle is temporary, but when the approach state of the other vehicle to the own vehicle continues for a predetermined time, For example, when a vehicle is stopped in a parking lot, in a traffic jam, or on a highway running alongside another vehicle, tire identification information of the other vehicle is continuously received, and the tire identification of the other vehicle is erroneously identified. I have a concern about registering information. If a receiver is provided for each transmitter and the receiving sensitivity and receiving direction of the receiver are set to receive only the air pressure detection signal from the corresponding transmitter, the tire identification information from other vehicles However, the number of receivers increases, which causes an increase in vehicle cost.
In addition, the necessity of registration of tire identification information is known to the user, and the tire identification information of another vehicle is used as the tire identification information of the own vehicle under circumstances other than the situation where the user permits. It is hoped that registration will not be performed without permission.

The present invention has been made in consideration of the above problems, and an object thereof is to prevent the tire identification information of another vehicle from being erroneously registered as the tire identification information of the own vehicle. To provide an air pressure alarm device.

[0005]

In order to achieve the above object, the present invention has the following means for solving the problem. That is, in the first configuration of the present invention, an air pressure sensor attached to each tire of an automobile to detect tire air pressure information, an alarm device for alarming the tire air pressure condition, and an alarm device for alarming the tire air pressure condition. With a control unit to make, each of the air pressure sensor is provided with a transmitter for transmitting different tire identification information set for each of the detected tire air pressure information and each air pressure sensor, while the control unit, A receiver that receives each information transmitted from the transmitter, an appropriate air pressure storage unit that stores the appropriate air pressure of the tire, an appropriate air pressure stored in the appropriate air pressure storage unit, and the air pressure detected by the air pressure sensor. Determination means for determining the tire pressure state based on the relationship with the tire pressure information, and the determination means for determining whether the tire pressure is excessive or insufficient. When the determination is made, the alarm control means for giving an alarm to the alarm device, and among the different tire identification information received by the receiver, the tire identification information having a high reception frequency is registered as the tire identification information of the own vehicle. And a tire identification information registration regulation means for regulating registration by the tire identification information registration means under a predetermined registration regulation condition. According to the first configuration of the present invention, when the tire identification information of another vehicle is under a predetermined registration regulation condition such that the tire identification information of another vehicle is erroneously registered as the tire identification information of the own vehicle, the tire identification information with high reception frequency is displayed. Since registration as the tire identification information of the own vehicle is restricted, it is possible to prevent the tire identification information of another vehicle from being mistakenly registered as the tire identification information of the own vehicle.

In the second configuration of the present invention, the tire identification information registration regulation means determines that the vehicle is in a stopped state under a predetermined registration regulation condition and regulates the registration of the tire identification information. I am doing it. According to the second configuration of the present invention, when the approaching state of another vehicle with respect to the own vehicle is in a stopped state in which it is assumed that the approaching state of the other vehicle is continued, the tire identification information having a high reception frequency is registered as the tire identification information of the own vehicle. Is regulated, it is possible to prevent the tire identification information of another vehicle from being erroneously registered as the tire identification information of the own vehicle.

In the third configuration of the present invention, the tire identification information registration regulation means determines that the vehicle is in a traffic jam condition under a predetermined registration regulation condition and regulates the registration of the tire identification information. I am doing it. According to the third configuration of the present invention, when the vehicle is in a traffic jam state in which it is assumed that another vehicle approaches the vehicle, the tire identification information that is frequently received is registered as the tire identification information of the vehicle. Is regulated, it is possible to prevent the tire identification information of another vehicle from being erroneously registered as the tire identification information of the own vehicle.

In the fourth configuration of the present invention, the tire identification information registration regulation means determines that the vehicle is in a predetermined registration regulation condition when the vehicle is traveling on a highway, and regulates the registration of the tire identification information. It is configured as follows. According to the fourth configuration of the present invention, when the vehicle is in a highway traveling state where it is assumed that another vehicle approaches the own vehicle continuously, the tire identification information having a high reception frequency is registered as the tire identification information of the own vehicle. Since it is restricted, it is possible to prevent the tire identification information of another vehicle from being mistakenly registered as the tire identification information of the own vehicle.

In the fifth configuration of the present invention, the tire identification information registration regulation means receives only the number of tire identification information corresponding to the number of tires that can be mounted on the automobile even under a predetermined registration regulation condition. The registration regulation is releasable so that the tire identification information of the number corresponding to the number of tires being received can be registered as new tire identification information when the above state continues for a predetermined time. When the tire is replaced, the tire identification information corresponding to the replaced tire needs to be immediately registered and updated in the control unit of the own vehicle. The registration is regulated under the assumed predetermined registration regulation condition. However, even under a predetermined registration regulation condition such as a stopped state, when the other vehicle is not actually approaching the own vehicle, the received tire identification information indicates the number of tires that can be attached to the own vehicle ( Only tire identification information corresponding to the number of spare tires) is received, and the tire identification information of another vehicle is not mistakenly registered as the tire identification information of the own vehicle. According to the fifth configuration of the present invention, when the state in which only the number of tire identification information corresponding to the number of tires attached to the own vehicle is received continues for a predetermined time, another vehicle exists around the own vehicle. Since it is determined not to be performed, the received tire identification information can be immediately registered as new tire identification information of the own vehicle.

In a sixth aspect of the present invention, the control unit is configured to allow a user to input a tire identification information registration permission signal, and the tire identification information registration restricting means registers the tire identification information by the user. When the permission signal is not input, it is determined that the predetermined registration regulation condition is satisfied, and the registration of the tire identification information is regulated. Usually, the user is aware of the necessity of updating and updating the tire identification information. According to the sixth configuration of the present invention, when the user does not input the tire identification information registration permission signal to the control unit, it is determined that the registration of the tire identification information should not be updated. It is possible to prevent erroneous registration of the identification information as the tire identification information of the own vehicle.

In the seventh aspect of the present invention, the tire identification information registration regulation means causes the alarm device to warn when the tire identification information different from the tire identification information registered by the tire identification information registration means is received. With
When the tire identification information registration permission signal is not input by the user after the alarm, it is determined that the predetermined registration regulation condition is satisfied, and the registration of the tire identification information different from the received registered tire identification information is regulated. I am doing it. When the tire identification information different from the registered tire identification information is received, it is not possible to identify whether new tire identification information is received by tire replacement or tire identification information from another vehicle is received. According to the seventh configuration of the present invention, when the tire identification information different from the registered tire identification information is received, the tire identification information registration restricting means uses the alarm device to confirm whether or not the tire identification information can be updated. Ask the user for confirmation by alerting. Then, when the registration update of the tire identification information is not possible, the tire identification information permission signal is not input, so the tire identification information different from the received registered tire identification information is the identification information of the new tire of the own vehicle. Instead, it is determined as the tire identification information of another vehicle, and its registration is restricted. Therefore, it is possible to prevent the tire identification information of another vehicle from being mistakenly registered as the tire identification information of the own vehicle.

According to an eighth aspect of the present invention, the control unit is configured to allow a user to input tire replacement information, and the tire identification information registration restricting means is based on the user's tire replacement information. When it is determined that the replacement is not executed, it is determined that the predetermined registration regulation condition is satisfied, and the registration of the tire identification information is regulated. Normally, the tire identification information registration update is not necessary except immediately after the tire replacement. According to the eighth configuration of the present invention, when tire replacement information is input by the user and it is determined that tire replacement has not been performed, tire registration is restricted, so tire identification information of another vehicle is displayed. Accidental registration can be suppressed.

In a ninth configuration of the present invention, the control unit includes an operating state detecting means for detecting an operating state of an ignition switch, and the tire identification information registration restricting means is operated by the operating state detecting means. When a transition from the off state to the on state is detected, an alarm for confirming tire replacement is issued to the alarm device, and it is determined whether or not the tire is replaced based on the tire replacement information after the alarm, and tire replacement is performed. When it is not performed, it is determined that the predetermined registration regulation condition is satisfied, and the registration of the tire identification information is regulated. According to the ninth aspect of the present invention, when the ignition switch is switched from the off state to the on state, the user is requested to confirm by issuing an alarm by an alarm whether the tire has been replaced or not. Then, the presence or absence of tire replacement is determined based on the tire replacement information input by the user, and when tire replacement is not performed, the registration of tire identification information is restricted, so the tire identification information of another vehicle is registered. It is possible to prevent erroneous registration as the tire identification information.

[0014]

According to the present invention, it is possible to prevent the tire identification information of another vehicle from being erroneously registered as the tire identification information of the own vehicle.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall configuration diagram relating to the first and second embodiments. In FIG.
The tires 2 to 5 are respectively equipped with air pressure sensors 6 to 9. Each air pressure sensor 6-9
Is equipped with a common antenna 10, and various detected information is supplied to the control unit 2 for the tire pressure condition warning.
It is designed to output to 0. The control unit 20
When it is determined that the tire pressures of the tires 2 to 5 are abnormal, the alarm device 30 is made to warn of the abnormal state.

FIG. 2 is a control block diagram relating to the first and second embodiments. The air pressure sensors 6 to 9 have pressure detecting portions 6a to 9a for detecting tire air pressures of the tires 2 to 5, respectively.
And temperature detection units 6b to 9b for detecting the tire temperature
And an acceleration detector 6c for detecting the acceleration of the vehicle 1.
9c and a storage unit 6d that stores the tire identification information of the vehicle.
9d, transmitters 6e to 9e for wirelessly transmitting to the control unit 20 the information detected by the detectors and the tire identification information of the own vehicle, and the central processing units 6f to 9f.
And are provided. Further, the control unit 20 includes a receiver 20a for receiving various kinds of information wirelessly transmitted from the air pressure sensors 6 to 9, and various kinds of information received by the receiver 20a and other various sensors 40. A central processing unit 20b that performs various processes such as a process of causing the alarm 30 to warn the tire pressure state based on the information;
A storage unit 20c for storing the tire identification information of the own vehicle and the proper air pressure is provided.

(Embodiment 1) FIG. 3 is a control block diagram showing the details of the control unit 20 according to Embodiment 1. The central processing unit 20b and the storage unit 20c of the control unit 20 have a proper air pressure corresponding to the tire temperature. The appropriate air pressure storage means 20d that stores the value, and the excess / deficiency amount calculation means for calculating the excess / deficiency amount based on the difference between the actually measured air pressure detected by the air pressure sensors 6 to 9 and the appropriate air pressure stored in the appropriate air pressure storage means 20d. 20e and excess / deficiency amount calculation means 20
determination means 20f for determining an excess / deficiency state of tire air pressure based on the excess / deficiency amount calculated by e;
When the tire air pressure is determined to be excessive or insufficient by f, the alarm control means 20g for outputting the alarm to the alarm device 30 to warn the excess or insufficient amount and the tire identification information received by the receiver 20a have a high reception frequency. Top 4 (number corresponding to the number of tires)
The tire identification information registration unit 20i that registers the tire identification information of No. 1 as the tire identification information of the vehicle in the tire identification information storage unit 20h, and the registration by the tire identification information registration unit 20i is regulated under a predetermined registration regulation condition. Tire identification information registration regulation means 20j is provided. The alarm device 30 can be displayed, for example, by using the display screen of the navigation system or by providing a dedicated display device on the instrument panel.
Can be as shown in. FIG. 4 shows an example in which a dedicated display device is provided on the instrument panel for display. For a tire having an excess or deficiency in tire air pressure, an appropriate air pressure (for example, 275 KPa) and an actually measured air pressure (for example, 250 KPa) are shown. ) And an excess / deficiency of tire air pressure (for example, -30 KPa). Further, FIG. 5 shows an example in which the display screen of the navigation system is used to display, and the measured air pressure of each wheel with respect to the appropriate air pressure band is displayed. The amount is displayed. Note that FIG. 5 shows an example in which the right rear wheel is insufficient by 30 KPa with respect to the proper air pressure.

Next, the air pressure sensor 6 according to the first embodiment
Specific control contents by the central processing units 6e to 9e of 9 to 9 will be described based on the flowchart of FIG. In step S1 of FIG. 6, the actually measured air pressure Po, the tire temperature T, and the acceleration G detected by the detection units 6a to 9a, 6b to 9b, and 6c to 9c of the air pressure sensors 6 to 9 are read. Subsequently, in step S2, it is determined whether or not the change in the actually measured air pressure Po is equal to or more than a predetermined value in an abnormal depressurized state. When it is determined to be YES in step S2, that is, when it is determined that the tire pressure is abnormally reduced due to a flat tire or the like, the latest tire pressure needs to be transmitted to the control unit 20 every moment, and thus step S3 is performed. To the control unit 20, at the shortest cycle t1, tire pressure,
The tire temperature is detected, and the measured actual air pressure Po and the detected tire temperature T are transmitted to the control unit 20. If NO in step S2, step S4
Then, based on the detected acceleration G, it is determined whether the vehicle is running. If it is determined to be YES in step S4 and it is determined to be the traveling mode, step S5
The tire pressure and the tire temperature of the running tire pressure state are detected at a long cycle t2 with respect to the abnormal depressurization mode, and the detected actually measured air pressure Po and the tire temperature T are transmitted to the control unit 20. Here, the reason why the detection / transmission cycle is set longer for the abnormal depressurization mode when the vehicle is in the traveling mode is that, in the normal traveling mode, the tire pressure detection urgency is low. This is to extend the battery life of the sensors 6 to 9. When it is determined to be NO in step S4 and the vehicle stop mode is determined, the process proceeds to step S6, and a cycle t3 that is longer than the cycle t1 of the abnormal depressurization mode and the cycle t2 of the traveling mode.
The tire pressure and the tire temperature are detected by the control unit 2 and the measured actual air pressure Po and the tire temperature T are detected.
Send to 0. Here, the longest detection in the stop mode, the reason for setting the transmission cycle, even if there is a change in the tire pressure, if the vehicle is in the stopped state, even if the notification of the state is delayed a little, there is little effect, This is because the detection and transmission cycles are lengthened to extend the battery life of the air pressure sensors 6 to 9.

Next, the control unit 2 according to the first embodiment
Specific control contents by the central processing unit 20b of 0 will be described based on the flowchart of FIG. In step S10 in FIG. 7, in addition to the actually measured air pressure Po, the tire temperature T, the acceleration G, and the own vehicle tire identification information detected by the detection units 6a to 9a, 6b to 9b, and 6c to 9c of the air pressure sensors 6 to 9, The vehicle speed signal, the ignition switch signal, various signals of the navigation system, and the identification information registration switch (not shown) signal operated by the user when the identification information of the vehicle tire is registered are read. Subsequently, in step S11, it is determined whether or not it is a registration mode in which the tire identification information of the vehicle is to be registered. Specifically, for example, the identification information registration switch is turned on and the ignition switch is turned on.
When it is performed, it is determined that the registration mode is set. Step S1
If YES is determined in step 1, the process proceeds to step S12,
Register the tire identification information. The details of registration of the tire identification information will be described later. In step S13, the appropriate air pressure Pb stored in the appropriate air pressure storage means 20d in step S10 is set as the appropriate air pressure Pb.
As the proper air pressure Pb stored in the proper air pressure storage means 20d, as shown in FIG. 5, the proper air pressure Pb corresponding to the tire temperature T is stored. Step S14
Then, with the appropriate air pressure Pb set in step S13,
The excess / deficiency amount ΔP is calculated based on the deviation from the measured air pressure Po read in step S10. In step S15, it is determined whether or not the excess / deficiency amount ΔP calculated in step S14 is equal to or more than a predetermined value. When the determination is YES, the process proceeds to step S16, and the measured air pressure P read in step S10.
o, the appropriate air pressure Pb set in step S13 and the excess / deficiency ΔP calculated in step S14 are displayed on the alarm device 30. If NO in step S15, the tire pressure is normal, and thus step S16
Bypassing the process of and returning.

Next, details of the tire identification information registration processing in step S22 in FIG. 7 will be described with reference to the flowchart in FIG. In step S20 of FIG. 8, the detection units 6a to 9a and 6b of the air pressure sensors 6 to 9 are described.
In addition to the measured air pressure Po, tire temperature T, acceleration G, and own vehicle tire identification information detected by 9b, 6c to 9c, vehicle speed signal, ignition switch signal, various signals of navigation system, own vehicle tire identification information registration, user The identification information registration switch (not shown) signal operated by is read. Subsequently, in step S21, it is determined whether or not all the tire identification information of the own vehicle is registered. When YES is determined in the step S21, the process proceeds to a step S22, and it is determined whether or not the tire identification information different from the already registered tire identification information is received by the receiver 20a. If YES is determined in step S22, that is, the tire identification information is already registered, but there is a possibility that new tire identification information is received due to tire replacement.
In step S23, the alarm device 30 is caused to give an alarm. Specifically, as shown in FIG. 9, a display is displayed on the display screen of the navigation system asking the user for permission to update and update the tire identification information. Then, in response to this display, when the user selects YES on the screen, the tire identification information registration permission signal is input from the navigation system to the control unit 20, and when NO is selected, the control unit 20 is selected. However, the tire identification information registration permission signal is not input. Returning to step S24 of FIG.
When the tire identification information registration permission signal is input in step S24, it is determined that different tire identification information is received due to tire replacement, and therefore the tire identification information registration processing in step S25 and subsequent steps is performed. In step S24, N
When it is determined to be O, it is considered that the different tire identification information is not associated with the tire replacement but the tire identification information of another vehicle is received, and therefore registration update of the returned tire identification information is restricted. In addition, the above step S2
If NO is determined in 1, it means that the tire identification information has not been registered. Therefore, steps S22 to S24 are bypassed and the process proceeds to step S25. Next, step S25-
At 27, it is determined whether the tire identification information of another vehicle is erroneously registered as the tire identification information of the own vehicle, that is, whether or not the registration regulation condition is satisfied. Specifically, in step S25, it is determined whether or not the vehicle is stopped based on the signal such as the vehicle speed. In step S26, the traffic congestion determination based on the average vehicle speed and the inter-vehicle distance and the navigation system determines whether the vehicle is congested based on the traffic congestion information obtained from an external information center or the like. Further, in step S27, it is determined whether or not the vehicle is traveling on the expressway based on the current position information and the like obtained by the navigation system. Then, when it is determined to be NO in all the determinations in steps S25 to S27, it is determined that there is a low possibility that the tire identification information of another vehicle will be erroneously registered as the tire identification information of the own vehicle, and thus the process proceeds to step S28, The tire identification information received by the receiver 20a is accumulated for a predetermined time, and the reception frequency for each tire identification information is calculated. Continue to Step S29
Then, among the tire identification information accumulated for a predetermined time, the top four pieces of tire identification information having a high reception frequency (the number corresponding to the number of tires) are registered and updated in the tire identification information storage means 20h as the tire identification information of the own vehicle. In addition, the above step S25
If at least one of the determinations in S27 is YES, it is determined that the tire identification information of another vehicle is erroneously registered as the tire identification information of the own vehicle under the registration regulation condition. Therefore, the process proceeds to step S30. In step S30, it is determined whether the number of pieces of tire identification information received within a predetermined time is only four, which corresponds to the number of tires. When YES is determined in the step S30, it is determined that there is no other vehicle around the own vehicle even though the registration regulation condition is satisfied, and therefore, the process proceeds to steps S28 and S29.
Performs registration update processing of tire identification information. If NO is determined in step S30, the tire identification information of the other vehicle is under registration regulation conditions in which the tire identification information of the other vehicle may be mistakenly registered as the tire identification information of the own vehicle, and the tire identification of the other vehicle is performed. Since it is determined that the information is being received, the process returns without performing the registration update in steps S28 and S29, that is, the registration update is restricted.

As described above, according to the first embodiment, the tire identification is performed under the registration regulation condition such that the other vehicle continues to approach the own vehicle such as the stopped state, the congested state, and the highway running state. Since the registration of information is regulated, it is possible to prevent the tire identification information of another vehicle from being mistakenly registered as the tire identification information of the own vehicle. Further, even under the above-mentioned registration regulation conditions, the state in which only the number of tire identification information corresponding to the number of tires mounted on the automobile (four in the first embodiment) is received continues for a predetermined time. Time,
Since the tire identification information of the number corresponding to the number of tires received is registered as new tire identification information, the tire identification information of another vehicle is not immediately registered as the tire identification information of the own vehicle, and a new tire is immediately added. Registration and update of identification information can be performed. Also, when tire identification information different from the registered tire identification information is received, the user is asked to confirm by alerting with a warning device whether registration update of the tire identification information is possible, and the user's reply to the confirmation Since it is determined based on the (tire identification information registration permission signal) whether to update the registration of the tire identification information or to perform registration regulation, registration of the tire identification information under conditions not permitted by the user is regulated, and It is possible to prevent the tire identification information from being mistakenly registered as the tire identification information of the own vehicle.

(Embodiment 2) Next, the specific control contents of the control unit 20 according to Embodiment 2 will be described with reference to FIG.
A description will be given based on the flowchart. The control block diagram is the same as that of the first embodiment (FIG. 3). In step S40 of FIG. 10, in addition to the actually measured air pressure Po, the tire temperature T, the acceleration G, and the own vehicle tire identification information detected by the detection units 6a to 9a, 6b to 9b, and 6c to 9c of the air pressure sensors 6 to 9, The vehicle speed signal, the ignition switch signal, various signals of the navigation system, and the identification information registration switch (not shown) signal operated by the user when the identification information of the vehicle tire is registered are read. Subsequently, in step S41, it is determined whether or not the ignition switch signal is switched from OFF to ON, and if YES is determined, the process proceeds to step S42, and the alarm device 30 is caused to give an alarm. Specifically, as shown in FIG. 11, a display is displayed on the display screen of the navigation system asking the user to confirm the tire replacement. Then, in response to this display, if the user selects YES on the screen, the navigation system inputs a signal indicating tire replacement to the control unit 20, and if NO is selected, the control unit 20 receives the signal. On the other hand, a signal indicating no tire replacement is input. Returning to step S43 in FIG. 10, it is determined in step S43 whether tire replacement has been performed. If YES in step S43, step S44
Then, the tire identification information received by the receiver 20a is accumulated for a predetermined time, and the reception frequency for each tire identification information is calculated. Subsequently, in step S45, among the tire identification information accumulated for a predetermined time, the top four tire identification information (the number corresponding to the number of tires) having a high reception frequency are stored in the tire identification information storage means 20h as the tire identification information of the own vehicle. Renew your registration.
When the result of the determination in any of steps S41 and S43 is NO, the tire identification information is not updated because the tires are not replaced, and the tire identification information registered in step S46 is not updated. The registration state in the tire identification information storage means 20h is maintained.

As described above, according to the second embodiment, when the ignition switch is switched from the OFF state to the ON state, that is, when it is assumed that the vehicle is about to be started for the first time immediately after the tire replacement, the alarm 30 When the user is asked to confirm the tire replacement by issuing an alarm, the registration update of the tire identification information is regulated when the user does not input the information that the tire has been replaced. It is possible to prevent the registration update from being performed, and to prevent the tire identification information of another vehicle from being mistakenly registered as the tire identification information of the own vehicle.

In the present embodiment, an example in which the display screen of the navigation system as the alarm device 30 is used for inputting the tire identification information registration permission signal and the tire replacement information by the user has been shown. It may be one shown in. FIG. 12 shows an example in which a disk drive 50a mounted on the vehicle 1 and capable of transmitting information to and from the control unit 20 is used. The disc drive 50a allows a user to insert a portable disc 50b in which a tire identification information registration permission signal and tire replacement information are written, and a tire identification information registration permission signal and tire replacement written in the disc 50b. It is configured to read information and transmit the read tire identification information registration permission signal and tire replacement information to the control unit 20. FIG. 13 shows an external input device 50 arranged at a predetermined location outside the vehicle 1 and capable of communicating information with the control unit 20.
An example using c is shown. The external input device 50c is composed of, for example, a terminal device owned by the user, and the user inputs a tire identification information registration permission signal and tire replacement information to the terminal device, and the input tire identification information registration permission signal, The tire replacement information is operated to be transmitted to the control unit 20 of the own vehicle by communication means such as a telephone line or radio wave communication means. Further, in the present embodiment, an example in which the tire air pressure insufficient state is displayed as an excess / deficiency amount, an appropriate air pressure, and a specific numerical value of the actually measured air pressure is shown. Alternatively, a warning buzzer or the like may be used. Also,
In the second embodiment, the engine start is disabled (for example, fuel supply is stopped or ignition is stopped) until the tire replacement information is input. The tire identification information may be registered without fail.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram according to first and second embodiments.

FIG. 2 is a control block diagram according to the first and second embodiments.

FIG. 3 is a control block diagram showing details of a control unit according to the first and second embodiments.

FIG. 4 is a diagram showing an example of a tire pressure state alarm related to the first and second embodiments.

FIG. 5 is a diagram showing an example of a tire pressure condition alarm according to the first and second embodiments.

FIG. 6 is a flowchart showing the control contents of the air pressure sensor according to the first embodiment.

FIG. 7 is a flowchart showing the control contents of the control unit according to the first embodiment.

8 is a flowchart showing the control contents related to the tire identification information registration processing of FIG.

FIG. 9 is a diagram showing an example of an alarm according to the first embodiment.

FIG. 10 is a flowchart showing the control contents of the control unit according to the second embodiment.

FIG. 11 is a diagram showing an example of an alarm according to the second embodiment.

FIG. 12 is a diagram showing another example relating to a user input device.

FIG. 13 is a diagram showing another example relating to a user input device.

[Explanation of symbols]

6-9: Air pressure sensor 20: Control unit 20d: Appropriate air pressure storage means 20f: determination means 20d: Appropriate air pressure correction means 20g: Alarm control means 20i: Tire identification information registration means 20j: Tire identification information registration regulation means 30: Alarm

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kiyoshi Sakamoto             3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Mazda             Within the corporation (72) Inventor Tsukasa Harada             3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Mazda             Within the corporation (72) Inventor Jun Okamitsu             3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Mazda             Within the corporation

Claims (9)

[Claims] 1. An air pressure sensor mounted on each tire of an automobile to detect tire air pressure information, an alarm device for alarming the tire air pressure condition, and a control unit for causing the alarm device to alarm the tire air pressure condition. , Each of the air pressure sensors is provided with a transmitter for transmitting the detected tire air pressure information and different tire identification information set for each air pressure sensor, while the control unit is provided with a transmission from the transmitter. A receiver for receiving each of the stored information, an appropriate air pressure storage means for storing the appropriate air pressure of the tire, and a relationship between the appropriate air pressure stored in the appropriate air pressure storage means and the tire air pressure information detected by the air pressure sensor. Determining means for determining the tire air pressure state based on the above, and the above-mentioned alarm when the tire air pressure excess or deficiency state is determined by the determining means. Alarm control means for alarming the information device, tire identification information registration means for registering tire identification information having a high frequency of reception among the different tire identification information received by the receiver as tire identification information of the vehicle, and predetermined registration An air pressure alarm device for a vehicle, which is provided with a tire identification information registration regulation means for regulating registration by the tire identification information registration means under regulatory conditions. 2. The tire identification information registration restriction means is configured to determine that the vehicle is in a predetermined registration restriction condition when the vehicle is stopped and to restrict registration of the tire identification information. Automotive air pressure alarm device. 3. The tire identification information registration restricting means is configured to restrict registration of tire identification information when the vehicle is in a traffic jam condition and is judged to be under predetermined registration restriction conditions. Automotive air pressure alarm device. 4. The tire identification information registration regulation means is configured to determine that the vehicle is under a predetermined registration regulation condition when the vehicle is traveling on a highway, and regulate the registration of the tire identification information. 1. A vehicle air pressure alarm device according to 1. 5. The tire identification information registration restricting means keeps receiving a predetermined number of tire identification information corresponding to the number of tires that can be mounted on an automobile for a predetermined time even under a predetermined registration restriction condition. The registration regulation is releasable so that a number of tire identification information corresponding to the number of tires received can be registered as new tire identification information when the vehicle is operated. Pneumatic alarm device. 6. The control unit is configured to allow a user to input a tire identification information registration permission signal, and the tire identification information registration restricting means has no user input of a tire identification information registration permission signal. 2. The vehicle air pressure alarm device according to claim 1, wherein the vehicle air pressure alarm device is configured to restrict registration of tire identification information when it is determined that a predetermined registration restriction condition is met. 7. The tire identification information registration regulation means causes the alarm device to warn when the tire identification information different from the tire identification information registered by the tire identification information registration means is received, and after the warning, the user. When the tire identification information registration permission signal is not input by the device, it is determined that the predetermined registration restriction condition is satisfied, and the registration of the tire identification information different from the received registered tire identification information is restricted. 7. A vehicle air pressure alarm device according to 7. 8. The control unit is configured to allow a user to input tire replacement information, and the tire identification information registration restricting means is not performing tire replacement based on the user's tire replacement information. 2. The vehicle air pressure alarm device according to claim 1, wherein the vehicle air pressure warning device is configured to restrict the registration of the tire identification information when it is determined that the condition is a predetermined registration restriction condition. 9. The control unit includes an operating state detecting means for detecting an operating state of an ignition switch, and the tire identification information registration restricting means changes the ignition switch from an off state to an on state by the operating state detecting means. When the change of the tire is detected, an alarm for confirming tire replacement is issued to the above alarm device, and it is determined whether or not the tire is replaced based on the tire replacement information after the alarm, and when tire replacement is not performed, a predetermined registration is performed. The vehicle air pressure alarm device according to claim 1, wherein the vehicle air pressure alarm device is configured to determine that the vehicle is under regulatory conditions and to regulate registration of tire identification information.