JP2003267008A - Air pressure warning device of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable warning control corresponding to running tires and a spare tire while suppressing complication of a registering operation and increase of a vehicle cost. <P>SOLUTION: An air pressure warning device comprises a single first antenna 13 for mainly receiving a signal transmitted from running tires 2 to 5, a second antenna 14 for mainly receiving a signal transmitted from a stored tire 7 stored in a spare tire storing part 6. The warning device also comprises a warning control means that turns on or off a warning lamp 30 based on a tire air pressure received by each antenna, and provides a difference between a turning-on state having abnormal air pressure for the running tires 2 to 5 received by the first antenna 13 and a turning-on state having abnormal air pressure for the stored tire 7 received by the second antenna 14. Different warning is performed every tire only by adding one antenna and providing the difference between the turning-on states of the inexpensive warning lamp 30 for the running tires 2 to 5 and the stored tire 7, so that the increase of the vehicle cost and the complication of the registering operation of a tire position can be suppressed. <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 a vehicle air pressure alarm device, and more particularly to a vehicle air pressure alarm device capable of alarm control according to a running tire and a spare tire.

[0002]

2. Description of the Related Art Conventionally, it is known to detect the air pressure of each tire of a vehicle and 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. Here, the air pressure alarm is not limited to the running tire, and is also applicable to the spare tire. However, if an abnormality occurs in the tire pressure of the spare tire and an air pressure warning is given, the user assumes that there is an abnormality in the tire pressure and confirms the abnormality of the running tire, but there is no abnormality in the running tire. For example, there is a concern that spare tire abnormalities may be overlooked without checking spare tires. Therefore, for all the running tires and spare tires, the tire identification of each tire is performed, and in order to warn the tire position together with the tire pressure information,
Registration of each tire position is performed. For example, in Japanese Patent No. 3061047, a user operates a registration switch provided in a vehicle to set a registration mode, and in a state of the registration mode, a predetermined order (for example, left front wheel, right front wheel). , The left rear wheel, the right rear wheel, and the spare tire in this order) are disclosed.

[0003]

However, in the above-mentioned prior art, it is necessary to perform a registration operation by a person, and these operations are performed every time a vehicle is manufactured, tires are replaced, tires are rotated, etc. It is necessary, and there is a problem that it becomes very complicated. Also, if a dedicated antenna is installed for each tire and an alarm device that can display the tire position is provided, it is possible to identify each tire position, but it is possible to identify the number of antennas and tire positions for each tire. You need a display screen to display,
There is a problem of increasing vehicle cost.

The present invention has been made in consideration of the above problems, and an object thereof is to perform alarm control according to a running tire and a spare tire while suppressing a complicated registration operation and an increase in vehicle cost. An object of the present invention is to provide a vehicle 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 that is mounted on each running tire of the vehicle and a stored tire stored in the spare tire storage unit and that detects tire pressure information, and a running tire of the vehicle and a stored tire of the vehicle. A single alarm lamp for warning abnormal air pressure by lighting, a transmitter for transmitting the detected tire pressure information to the air pressure sensor, and a transmitter for each running tire among the transmitters. A single first antenna that mainly receives a signal, and a second antenna that is arranged near the spare tire storage section and that mainly receives a signal transmitted from a transmitter of the stored tire stored in the spare tire storage section The alarm lamp is turned on or off based on the antenna and the tire pressure information received by each of the antennas. The lighting mode of the abnormal air pressure against the running tire is received is configured to above the alarm control means for varying the lighting mode of the abnormal air pressure for storing the tire received at the second antenna is provided. According to the first configuration of the present invention, since one second antenna that mainly receives the transmission signal from the transmitter of the stored tire stored in the spare tire storage unit is added, the running tire and the stored tire are identified. can do. In addition, since the lighting pattern of the alarm lamp is changed between the running tire and the stored tire, even if the warning lamp for a warning, which is inexpensive and cannot display the tire position, is included in the running tire and the stored tire. The user can be made aware of which tire has an abnormality. Therefore, one antenna can be added, and different alarms can be issued to the running tire and the stored tire by simply changing the lighting mode of the inexpensive alarm lamp between the running tire and the stored tire. It is not necessary to provide an expensive display device for displaying the tire position, and it is possible to suppress an increase in vehicle cost and a complicated tire position registration operation.

In the second configuration of the present invention, the stored tire has a proper air pressure set higher than that of a running tire, and spare tire identification information for registering tire identification information when the stored tire is a spare tire. Registration means is provided, and the spare tire identification information registration means is such that when the tire air pressure of the stored tire received by the second antenna is higher than the tire air pressure of all running tires received by the first antenna, It is configured to identify that the tire stored in the spare tire storage section is a spare tire and to register the tire identification information transmitted from the identified spare tire together with the tire pressure information as the tire identification information of the spare tire. I am doing it. Normally, the air pressure of the spare tire is set higher than that of the running tire. Therefore, when the spare tire is mounted at any position by tire replacement, high air pressure is transmitted with respect to the air pressure of the running tire, and therefore the alarm control means may give an erroneous alarm that the tire air pressure is excessive. is there. The second configuration of the present invention is made by focusing on the fact that the air pressure of the spare tire is set higher than the air pressure of the traveling tire as described above, and according to the third configuration of the present invention. If the tire pressure of the stored tire received by the second antenna is higher than the tire pressure of the running tire received by the first antenna,
Since the stored tire stored in the spare tire storage unit can be recognized as a spare tire, the tire identification information of the spare tire can be registered in advance. Therefore, for example, even when the spare tire is mounted at the traveling tire position due to a flat tire or the like, it is possible to discriminate whether the mounted tire is the traveling tire or the spare tire, and thus it is possible to suppress a false alarm.

In the third structure of the present invention, the signal transmitted from the transmitter of the stored tire has the highest electric field strength among the reception relations between the transmitter of each tire and the second antenna. The reception relationship is set as follows. According to the third configuration of the present invention, the reception relationship is set with respect to the second antenna so that the signal transmitted from the transmitter of the stored tire has the highest electric field strength. It is possible to prevent the signal transmitted from the transmitter from being erroneously received as the signal from the stored tire.

In a fourth structure of the present invention, the storage tire and the second antenna are stored in the spare tire storage portion, and a signal transmitted from the transmitter of each running tire to the second antenna is stored. It is configured to include a shielding member that restricts reception of the. According to the fourth configuration of the present invention, since the shielding member regulates the reception relationship for the tire other than the stored tire for the second antenna, a signal transmitted from the transmitter of another running tire is erroneously output from the stored tire. It is possible to suppress reception as a signal of.

According to a fifth aspect of the present invention, an air pressure sensor mounted on each running tire of a vehicle and a stored tire stored in a spare tire storage section for detecting tire pressure information, and each running tire and stored tire of the vehicle. An alarm for warning the tire air pressure state of the tire, a transmitter provided in the air pressure sensor, for transmitting the detected tire air pressure information,
A single first antenna that mainly receives a transmission signal from the transmitter of each running tire among the transmitters, and a storage tire that is arranged near the spare tire storage unit and is stored in the spare tire storage unit Second antenna that mainly receives a transmission signal from the transmitter of the vehicle, and the running tire received by the first antenna while causing the alarm to issue an alarm based on tire pressure information received by each of the antennas. And an alarm control means for differentiating the alarm control mode for the stored tire received by the second antenna. According to the fifth configuration of the present invention, a second antenna that mainly receives a signal transmitted from the transmitter of the stored tire stored in the spare tire storage unit is added, and
Since the alarm control means is configured to change the tire pressure abnormality control mode between the running tire and the stored tire, it is possible to distinguish the running tire and the spare tire by adding one antenna, and Alarm control can be performed according to the tire and the spare tire.

[0010]

According to the present invention, it is possible to perform alarm control according to a running tire and a spare tire while suppressing a complicated registration operation and an increase in vehicle cost.

[0011]

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 according to the embodiment. In FIG. 1, a vehicle 1 is provided with traveling tires 2 to 5 and a spare tire storage section 6 stores a spare tire 7 as a storage tire. Tires 2-5 and 7 are equipped with air pressure sensors 8-12, respectively. Here, in the embodiment, the example in which the spare tire 7 is stored in the spare tire storage portion 6 has been shown.
When any of the traveling tires 2 to 5 is replaced with the spare tire 7 due to a flat tire or the like, the spare tire storage unit 6 may store one of the traveling tires 2 to 5. Air pressure sensor 8 for each running tire 2-5
11 is equipped with a common first antenna 13, and the air pressure sensor 12 of the spare tire 7 is equipped with a second antenna 14, which outputs various detected information to the control unit 20 for tire pressure condition warning. It is supposed to do. The control unit 20 controls each tire 2-5, 7
When it is determined that the tire pressure is abnormal, the alarm device 30 is made to warn of the abnormal state. As shown in FIG. 2, the second antenna 14 is stored together with the spare tire 7 in the spare tire storage section 6, and each tire 2 to
Of the tires 5 and 7, the distance to the spare tire 7 is set to be the shortest, and the air pressure sensors 8 to 12 of the tires 2 to 5 and 7 are set.
The signal transmitted from the pneumatic sensor 12 of the spare tire 7 is set to have the highest electric field strength among the reception relationships between the second antenna 14 and the second antenna 14. Further, a metal shielding cover 15 is provided on the outer periphery of the spare tire storage portion 6 so that the second antenna 14 does not receive signals from the pneumatic pressure sensors 6 to 11 of tires other than the spare tire 7 as much as possible. ing.

FIG. 3 is a control block diagram relating to the embodiment. The air pressure sensors 8 to 12 have pressure detecting portions 8a to 12a for detecting tire air pressures of the tires 2 to 5 and 7, respectively.
And temperature detection units 8b to 12 for detecting the tire temperature.
b and an acceleration detection unit 8 for detecting the acceleration of the vehicle 1.
c to 12c, storage units 8d to 12d that store the tire identification information of the own vehicle, and a transmitter 8e for wirelessly transmitting the information detected by each of the detection units and the tire identification information of the own vehicle to the control unit 20. ~ 12e and central processing unit 8
f to 12f are provided. In addition, the control unit 2
0 is a receiver capable of receiving various information wirelessly transmitted from the air pressure sensors 8 to 12 and distinguishing between various information received by the first antenna 13 and various information received by the second antenna 14. 20a and the receiver 2
0a and the central processing unit 20b that performs various processes such as a process of causing the alarm device 30 to warn the tire pressure state based on the various information received from the various sensors 40 and the tire identification information of the own vehicle, A storage unit 20c for storing the proper air pressure is provided.

(First Embodiment) FIG. 4 is a control block diagram showing the details of the control unit 20 according to the embodiment.
Central processing unit 20b and storage unit 20 of the control unit 20
c is an appropriate air pressure storage unit 20d that stores the proper air pressure of the tire, and an excess or deficiency based on the difference between the actually measured air pressure detected by the air pressure sensors 8 to 12 and the appropriate air pressure stored in the appropriate air pressure storage unit 20d. Excess / deficiency amount calculating means 20e, a determining means 20f for determining an excess / deficiency state of tire air pressure based on the excess / deficiency amount calculated by the excess / deficiency amount calculating means 20e, and an excess / deficiency of tire air pressure by the determining means 20f. When the state is determined, the alarm control means 20g for outputting the alarm to the alarm device 30 and the tire identification information received by the first antenna 12 are the highest four reception frequencies (the number corresponding to the number of running tires). ) Running tire identification information registration means 20i for registering the tire identification information as the running tire identification information of the own vehicle in the tire identification information storage means 20h; When the tire pressure received by the second antenna 14 is higher than a predetermined value with respect to all the four tire pressures having high reception frequency received by the antenna 13, the stored tire stored in the spare tire storage unit 6 is the spare tire 7. Spare tire 7 (stored tire) stored in the spare tire storage unit 6
There is provided spare tire identification information registration means 20j for registering the tire identification information transmitted from the tire identification information storage means 20h as the tire identification information of the spare tire 7. The alarm device 30 is composed of a warning alarm lamp provided on an instrument panel, and is turned on in a predetermined lighting mode described later when the tire pressure is abnormal, and is turned off when the tire pressure is normal.

Next, the air pressure sensors 8 to 8 according to the embodiment will be described.
Specific control contents by the central processing units 8e to 12e of 12 will be described based on the flowchart of FIG.
In step S1 of FIG. 5, the actually measured air pressure Po, the tire temperature T, and the acceleration G detected by the detection units 8a to 12a, 8b to 12b, and 8c to 12c of the air pressure sensors 8 to 12 are read. Then, in step S2, the actually measured air pressure Po
It is determined whether or not there is an abnormal depressurization state in which the change of is greater than or equal to a predetermined value. 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. Then, the control unit 20 detects the tire air pressure and the tire temperature at the shortest cycle t1 for the control unit 20, and transmits the detected actually measured air pressure Po and the tire temperature T to the control unit 20. Further, when NO is determined in step S2, the process proceeds to step S4, and it is determined based on the detected acceleration G whether the vehicle is in the traveling state. YE in step S4
If it is determined to be S and it is determined that the vehicle is in the traveling mode, the process proceeds to step S5, in which the tire air pressure state during traveling is detected while the tire air pressure and the tire temperature are detected at a long cycle t2 with respect to the abnormal pressure reducing mode. Measured air pressure Po,
The tire temperature T is transmitted to the control unit 20. here,
The reason why the detection / transmission cycle is set to be long for the abnormal depressurization mode in the traveling mode is that the tire pressure detection urgency is low in the normal traveling mode. This is to extend the battery life of No. 12 battery. If NO in step S4 and if the vehicle stop mode is determined, the process proceeds to step S6, and the tire pressure and the tire temperature are detected at a cycle t3 that is longer than the cycle t1 of the abnormal pressure reduction mode and the cycle t2 of the running mode. At the same time, the measured actual air pressure Po and the detected tire temperature T are transmitted to the control unit 20. 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 8 to 12.

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 of FIG. 6, various signals such as the actually measured air pressure Po, the tire temperature T, the acceleration G, and the vehicle tire identification information detected by the detection units 8a to 12a, 8b to 12b, and 8c to 12c of the air pressure sensors 8 to 12. Read in. Subsequently, in step S11, it is determined whether or not the tire identification information of the own vehicle has been registered. When it is determined NO in step S11, the process proceeds to steps S12 and S13, and the running tires 2 to 5 are used.
Also, the tire identification information is registered for the spare tire 7. The details of registration of the tire identification information will be described later. In step S14, it is determined whether or not the signal from the spare tire 7 is received, and when the determination is YES,
It proceeds to step S15. In step S15, it is determined whether or not the air pressure of the spare tire 7 is abnormal. For example,
When the deviation ΔP between the proper air pressure Ps stored in the proper air pressure storage means 20d and the actually measured air pressure Po read in step S10 is a predetermined value or more, it is determined that the air pressure of the spare tire 7 is abnormal. The appropriate air pressure P of the spare tire 7 stored in the appropriate air pressure storage means 20d.
s is set to be higher than the proper air pressure Pb of the traveling tires 2 to 5 described later, for example, the proper air pressure Pb of the traveling tires 2 to 5 is set to 230 KPa, and the proper air pressure Ps of the spare tire 7 is 420 KPa. It is set. Further, since the proper air pressures Ps and Pb change according to the tire temperature T, it is desirable to store the proper air pressure Pb corresponding to the tire temperature T. If YES is determined in the step S15, the process proceeds to a step S16, the spare tire abnormality flag Fs is set to 1, and the step S1 is performed.
If NO is determined in 5, the process proceeds to step S17, and the spare tire abnormality flag Fs is set to 0. If NO in step S14, step S14
In step 18, it is determined whether or not there is an abnormality in the air pressure of the running tires 2-5. In addition, the abnormality determination of the running tire is performed in the same manner as the abnormality determination of the spare tire 7. Step S18
If YES is determined in step S19, the process proceeds to step S19, the running tire abnormality flag Fb is set to 1, and step S1 is performed.
When NO is determined in 8, the process proceeds to step S20, and the running tire abnormality flag Fb is set to 0. Step S
21, it is determined whether or not the abnormality determination has been completed for the traveling tires 2 to 5 and the spare tire 7, and step S21
If NO is determined in step S10, the process returns before step S10, and steps S10 to S20 are repeated until the abnormality determination is completed for all the tires. Step S2
If YES is determined in step 1, the process proceeds to step S22,
It is determined whether or not only the running tires 2 to 5 are abnormal. If YES in step S22, step S2
3, the warning is given by the first lighting mode in which the alarm 30 is continuously lit as shown in FIG.
The user is warned of the abnormal air pressure of ~ 5. If NO is determined in step S22, the process proceeds to step S24, and it is determined whether or not only the spare tire has an abnormality. If YES is determined in the step S24, the step S2 is performed.
5, the alarm is issued by the second lighting mode in which the alarm device 30 is intermittently lit as shown in FIG. 8, and the user is warned of the abnormal air pressure of the spare tire 7. Step S24
If NO is determined in step S26, the process proceeds to step S26, and it is determined whether or not both the running tires 2 to 5 and the spare tire 7 are abnormal. If YES is determined in the step S26, the process proceeds to a step S27, and after the lighting is continuously performed for a predetermined period as shown in FIG. Also, the user is warned of the abnormal air pressure of the spare tire 7.

Next, details of the running tire identification information registration processing in step S12 in FIG. 6 will be described with reference to the flowchart in FIG. Step S30 of FIG.
In the air pressure sensors 8-12, the respective detecting portions 8a-12
Various signals such as the actually measured air pressure Po, the tire temperature T, the acceleration G, and the own vehicle tire identification information detected by a, 8b to 12b, and 8c to 12c are read. Subsequently, in step S31, it is determined whether or not all the tire identification information of the own vehicle is registered. If YES is determined in step S31,
In step S32, 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 S32, 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. Therefore, the process proceeds to step S33 and the receiver 20
The tire identification information received in a is accumulated for a predetermined time, and the reception frequency for each tire identification information is calculated. Continue, Step S
At 34, among the tire identification information accumulated for a predetermined time, the top four tire identification information (the number corresponding to the number of running tires) having high reception frequency are stored in the tire identification information storage unit 20h as the identification information of the running tires of the own vehicle. Renew your registration. If NO in step S32, step S33,
The process returns without updating the registration in S34.

Next, details of the spare tire identification information registration processing in step S13 in FIG. 6 will be described with reference to the flowchart in FIG. Step S4 of FIG.
0, each tire pressure information Pi (i = 1, 2, 3, 4) from the running tires 2 to 5 and tire position identification information I
In step S41, the tire pressure information Po and the tire position identification information Io from the spare tire 7 stored in the spare tire storage unit 6 are received. Continue,
In step S42, it is determined whether or not all deviations between the tire air pressures of the traveling tires 2 to 5 and the air pressure of the spare tire 7 are equal to or more than a predetermined value α. When YES is determined in step S42, that is, when the tire pressure of the spare tire 7 is higher than the tire pressures of all the running tires 2 to 5, the stored tire stored in the spare tire storage unit 6 is the spare tire. Since it is determined to be 7, the tire position identification information Io transmitted from the spare tire 7 together with the tire pressure Po is registered as the tire position identification information of the spare tire 7 in step S43, and the step S4 is performed.
In step 4, a registration completion message is output to the user.
If NO is determined in step S42, the spare tire 7 may be already mounted as a running tire due to tire replacement or the like, so the registration process of step S43 is bypassed and the registration is not performed in step S45. Output a completion message to the user.

As described above, according to this embodiment, the second
With the addition of the antenna 14, different warnings can be given to the traveling tires 2 to 5 and the spare tire 7 only by changing the lighting mode of the alarm device 30 between the traveling tires 2 to 5 and the spare tire 7 when the tire pressure is abnormal. Therefore, it is not necessary to perform a complicated registration operation by a person, an increase in vehicle cost can be suppressed, and the air pressure of the spare tire 7 is set higher than the air pressure of the running tire. When the tire air pressure of the spare tire 7 received by the second antenna 14 is higher than the tire air pressure of the traveling tires 2-5 received by the first antenna 13, the stored tire stored in the spare tire storage unit 6 is Since it can be recognized as the spare tire 7, the tire identification information of the spare tire 7 can be registered in advance. Therefore, for example, even when the spare tire 7 is mounted at the running tire position due to a flat tire or the like,
It is possible to discriminate between the mounted running tires 2 to 5 and the spare tire 7, and it is possible to suppress false alarms. Also, the second
Since the reception relationship is set for the antenna 14 so that the signal transmitted from the spare tire 7 has the highest electric field strength, the signals transmitted from the other running tires 2 to 5 are erroneously transmitted from the spare tire. Reception as a signal can be suppressed. Further, since the shielding member 15 regulates the reception relationship of the second antenna 14 with respect to tires other than the spare tire 7, it is possible to prevent a signal transmitted from another running tire from being erroneously received as a signal from the spare tire 7. can do.

In the present embodiment, in setting the reception relationship for the second antenna 14 so that the signal transmitted from the spare tire 7 has the highest electric field strength, the second antenna 14 and the spare tire 7 are set. Although the example in which the distance between the two is made shortest is shown, generally, since the electric field strength has the relationship shown in the following equation, the transmission power Pt and the power gain G are
the transmitter 12e of the spare tire 7 to increase t, the second
The antenna 14 may be set. E: electric field strength Pt: transmission power [W] Gt: power gain of transmission antenna [dipole ratio] d: distance between transmission and reception [m] Further, in the present embodiment, an example of an alarm lamp as the alarm device 30 is shown. The alarm buzzer may be used to give an alarm. In that case, the form of the alarm sound may be changed for each tire.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram according to an embodiment.

FIG. 2 is a diagram showing a stored state of a spare tire according to the present embodiment.

FIG. 3 is a control block diagram according to the embodiment.

FIG. 4 is a control block diagram showing details of a control unit according to the embodiment.

FIG. 5 is a flowchart showing the control contents of the air pressure sensor according to the first embodiment.

FIG. 6 is a flowchart showing the control contents of the control unit according to the first embodiment.

FIG. 7 is a diagram showing a first lighting mode by the alarm device 30.

FIG. 8 is a diagram showing a second lighting mode by the alarm device 30.

FIG. 9 is a diagram showing a third lighting mode by the alarm device 30.

FIG. 10 is a flowchart showing details of S12 control contents of FIG.

FIG. 11 is a flowchart showing details of S13 control contents in FIG.

[Explanation of symbols]

2-5: Running tire 6: Spare tire storage 7: Spare tire (stored tire) 8-12: Air pressure sensor 13; first antenna 14: Second antenna 20: Control unit 20g: Alarm control means 20i: Running tire identification information registration means 20j: Spare tire identification information registration means 30: Alarm

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) G08C 17/02 G08C 19/00 S 19/00 17/00 BF term (reference) 2F055 AA12 BB20 CC60 DD20 EE40 FF32 2F073 AA03 AA36 AB02 AB03 AB12 BB01 BC02 CC01 CC08 DD02 FF20 GG01 GG07 GG08

Claims (5)

[Claims] 1. An air pressure sensor mounted on each running tire of a vehicle and a storage tire stored in a spare tire storage unit for detecting tire pressure information, and an alarm by lighting an abnormal air pressure of each running tire of the vehicle and the stored tire. A single alarm lamp, a transmitter for transmitting the detected tire pressure information, which is provided in the air pressure sensor, and mainly receives a signal transmitted from the transmitter of each running tire among the transmitters. A single first antenna; a second antenna that is arranged near the spare tire storage unit and mainly receives a signal transmitted from a transmitter of the stored tire stored in the spare tire storage unit; And turning on or off the alarm lamp based on tire pressure information received in the traveling tire received in the first antenna. Pressure warning system for a vehicle having a lighting mode for the abnormal air pressure, and a warning control means for varying the lighting mode for the abnormal air pressure of the storage tire received at the second antenna. 2. The stored tire has a proper tire pressure set higher than that of a running tire, and spare tire identification information registration means for registering tire identification information when the stored tire is a spare tire is provided. The spare tire identification information registration means stores in the spare tire storage unit when the tire air pressure of the stored tire received by the second antenna is higher than the tire air pressure of all running tires received by the first antenna. The tire identification information transmitted from the identified spare tire together with the tire pressure information is registered as the tire identification information of the spare tire. Vehicle air pressure alarm device. 3. The reception relationship is set so that the signal transmitted from the transmitter of the stored tire has the highest electric field strength among the reception relationships between the transmitter of each tire and the second antenna. The air pressure alarm device for a vehicle according to claim 1. 4. The storage tire and the second antenna are stored in the spare tire storage portion, and the spare tire storage portion also stores the second tire.
The vehicle air pressure alarm device according to any one of claims 1 to 3, further comprising a shield member that restricts reception of a signal transmitted from a transmitter of each of the running tires to an antenna. 5. An air pressure sensor mounted on each running tire of a vehicle and a stored tire stored in a spare tire storage section for detecting tire pressure information, and a tire pressure state of each running tire of the vehicle and the stored tire is alarmed. An alarm, a transmitter for transmitting the detected tire pressure information, which is provided in the air pressure sensor, and a single first transmitter that mainly receives the signal transmitted from the transmitter of each running tire among the transmitters. One antenna, a second antenna that is arranged near the spare tire storage unit and mainly receives a signal transmitted from the transmitter of the stored tire stored in the spare tire storage unit, and is received by each antenna. An alarm control mode for the running tire received by the first antenna, while causing the alarm to issue an alarm based on tire pressure information; Pressure warning device of a vehicle and a warning control means for varying the warning control mode for storing the tire received at the two antennas.