JPH06247114A - Tire abnormality warning device of automobile with remote control device - Google Patents

Abstract

PURPOSE:To detect the abnormal condition of a tire and to output a warning depending on the detecting result, responding to the condition of an automobile, in a simple and low cost structure. CONSTITUTION:A receiver device 1 receives a lock or an unlock signal from an electric wave key (An operation key) 2 and makes a door lock mechanism 8 carry out a lock or an unlock operation. When an abnormality detecting signal of a tire is received from a transmitter 11 provided to the tire, either a first or a second warning device 9 or 10 is driven. In this case, the receiver device 1 outputs a warning to the inside of a car room by using the first warning device 9 when a driver is in the car room, while outputs the warning to the outside by using the second warning device 10 when the driver is not in the car room, according to the condition of the door lock mechanism 8, the door opening and closing condition, and the condition of an engine.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a remote control device comprising a receiving device for receiving an unlocking or locking in-air propagation signal transmitted from an operation key, and driving a door lock mechanism according to the receiving operation. The present invention relates to a tire abnormality alarm device for an automobile, which is configured to be unlocked or locked.

[0002]

2. Description of the Related Art Conventionally, as this type of device, there is a device which detects a fall of a hub nut fixing a tire to a hub or a state of decrease in air pressure of the tire and informs the user of this. For example, a sensor that detects the contact state between the hub nut that fixes the tire and the hub is provided, and an air pressure sensor that detects the internal pressure of the tire is provided, and each sensor from the transmitter attached to the wheel part It is configured to output a detection signal, and the detection signal is received by a receiver provided in the vehicle, and when there is an abnormality, an alarm operation such as sounding an alarm is performed.

As a result, it is possible to prevent the hub nut from falling off and the tire from coming off, and it becomes possible to detect a decrease in the air pressure of the tire, thereby further improving safety. .

[0004]

By the way, as an abnormal state of the tire of the automobile, for example, a hub nut fixing the tire in a running state is loosened,
There are abnormal conditions related to the tire mounting condition such as those that are missing, abnormal conditions where the tire air pressure decreases, and abnormal conditions where the tire is removed due to theft when the user is absent such as when parked. , Caused by various situations.

For example, when the hub nut of the tire is loose or has fallen off, the tire may be stolen when the user is absent while the vehicle is parked. When a person is in the vehicle, if the vehicle is left in that state, the tires may come off during traveling, causing a serious problem. In this case, when the user is absent,
When an abnormal condition of the tire is detected, it is necessary to perform an alarm operation such as issuing an alarm outside the vehicle with a horn or notifying the user by wireless etc.When there is a user inside the vehicle, a loud noise from the horn etc. Instead, it is necessary to inform the user with a buzzer or lamp.

However, since the transmitter attached to the wheel of the tire only outputs a signal indicating an abnormal state of the tire, the conventional structure as described above causes an alarm operation corresponding to the above situation. Can't do. That is, when the horn is sounded as the alarm action, the alarm action is performed with an unnecessarily loud sound even when the user is present in the vehicle, and conversely,
When the buzzer for in-vehicle notification sounds as the alarm operation, there is a problem that it is not possible to notify the outside of the vehicle when the tire is stolen.

The present invention has been made in view of the above circumstances, and an object thereof is to detect an abnormal state of a tire and to issue an alarm corresponding to the state of an automobile based on the abnormal state of the tire while having a simple and inexpensive structure. (EN) Provided is a tire abnormality alarm device for an automobile equipped with a remote control device which can be operated.

[0008]

A tire abnormality alarm device for a vehicle equipped with a remote control device according to the present invention comprises a receiving device for receiving an unlocking or locking air propagation signal transmitted from an operation key. And a remote control device for performing an unlocking operation or a locking operation by driving a door lock mechanism according to a receiving operation of the vehicle. Is provided with a transmitter that transmits an abnormal propagation signal for detecting abnormality in the air conditioner, and the receiving device causes the alarm means to perform an alarm operation when the abnormality detection signal transmitted from the transmitter is received. It has a feature in that it is configured.

[0009]

According to the tire abnormality alarm device for an automobile equipped with the remote control device of the present invention, when an abnormality occurs in the tire of the automobile, the abnormal condition is detected and the transmitter transmits the abnormal propagation signal in the air. Then, the receiving device receives this abnormality detection signal. Then, the receiving device causes the alarm means to perform the alarm operation based on the abnormality detection signal from the transmitter. In this case, the receiving device normally drives the door lock mechanism based on an unlocking or locking propagating signal from the remote control device to perform a locking operation or an unlocking operation. The alarm operation can be performed for the inside of the vehicle or the outside of the vehicle according to the driving state of the mechanism. Accordingly, the alarm operation can be performed according to the state of the vehicle such as the state where the vehicle is parked and there is no user or the state where the user is present.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. That is, FIG. 1 shows an outline of the entire electrical configuration. The receiving device 1 provided on the body side of a vehicle is composed of a microcomputer, ROM, RAM, etc., and a program is stored in advance. It is designed to work like. The radio wave key 2 as an operation key comprises a key plate 2a and a key grip 2b for inserting and rotating the key cylinder of an automobile. The key grip 2b includes a lock switch 3 and an unlock switch 4. And a key signal transmitting circuit for transmitting a door lock signal or a door unlock signal as a radio signal together with an ID code in accordance with the pressing operation of the lock switch 3 or the unlock switch 4.

The receiving apparatus 1 is provided with an antenna 1a so as to receive the radio wave signal from the radio wave key 2 described above. Also, an ignition switch 5, a door courtesy switch 6 provided on each door, and a vehicle speed sensor 7 for detecting a vehicle speed are connected to the respective input terminals of the receiving device 1 provided in the driver's seat of the automobile. A drive device 8a for driving the door lock mechanism 8 and first and second alarm devices 9 and 10 are connected to the respective output terminals of the receiving device 1. In this case, the first alarm device 9 is composed of a buzzer or the like provided in the vehicle, and notifies the passengers of the vehicle to the extent that it can be heard, and the second alarm device 10 uses, for example, a horn provided in the vehicle. It is used to give an alarm so that it can be heard outside the vehicle, and both functions as an alarm means.

On the other hand, the transmitter 11 which detects an abnormal state of the tire and outputs an abnormality detection signal as a radio wave signal includes a transmission circuit 12 (see FIG. 5), four abnormality detection switches 13a to 13d, an air pressure sensor 14 and It is configured by the antenna 15. Each terminal of the transmission circuit 12 has four abnormality detection switches 13a to 13d and an air pressure sensor 14.
Are connected so as to be electrically grounded. In this case, as will be described later, the four abnormality detection switches 13a to 13d and the air pressure sensor 14 that detects the tire air pressure are in the on state in the normal state, and are in the off state when the abnormal state is detected. Then, based on this, the transmission circuit 12 transmits the abnormality detection signal from the antenna 15 as a radio wave signal.

Next, referring to FIGS. 2 to 4, the transmitter 1 will be described.
The configuration of No. 1 will be described. That is, the transmission circuit 12
The four brackets 1 are housed in a case 16 having a flat cylindrical shape, and the mounting member serves also as the abnormality detection switches 13a to 13d from the bottom surface thereof in all directions.
7 is provided. Each bracket 17 is made of a conductive material, and an insulating layer 17 is provided on the back side of the tip of the bracket 17.
a (enlarged in FIG. 4) is provided. An insertion hole 17b is formed at the tip of each bracket 17.

Now, the tire 18 mounted on the automobile
Is fixed by a hub nut 22 in a state where four hub bolts 21 projecting from a hub 20 at the end of the axle of the automobile are inserted into an insertion hole 19a formed in the wheel 19, and at this time, The hub nut 22 is tightened and fixed with the insertion holes 17 a of the four brackets 17 of the transmitter 11 inserted between the hub bolt 21 and the hub nut 22.

As a result, the transmitter 11 is mounted on the outside of the central portion of the wheel 19, and in this state, the brackets 17 and the hub nut 22 are in pressure contact with each other and are in electrical contact. Also, at this time, the bracket 1
7 and the wheel 19 are in a pressure contact state, but the insulating layer 17
Since a is interposed, it is electrically insulated. As a result, the bracket 17 is grounded, that is, grounded via the hub nut 22, the hub bolt 21, and the hub 20, and the bracket 17 and the hub nut 22 constitute the abnormality detection switch 13. That is, the abnormality detection switch 13 is normally in the ON state, and when an abnormal state such as the hub nut 22 loosening or falling off occurs, the bracket 17 and the hub nut 22 are separated from each other to be in a non-contact state. As a result, the bracket 17 is no longer grounded and is turned off.

The air pressure sensor 14 is provided inside the tire 18 on the outer peripheral portion of the wheel 19, and the cap 25 is provided with one end of the connection cable 24 connected to the valve 23 protruding from the outside. It is installed. The other end of the connection cable 24 is connected to the connection terminal of the transmission circuit 12 so that the transmission circuit 12 and the air pressure sensor 14 are in electrical contact. The air pressure sensor 14 connects the connection cable 24 to the wheel 1 in a normal state where the air pressure of the tire 18 is equal to or higher than a predetermined value.
It is kept grounded via 9 and turns off when the air pressure drops below a specified value and turns off.
The electrical contact between the wheel 4 and the wheel 19 is cut off.

Next, the electrical configuration of the transmission circuit 12 will be described with reference to FIG. The piezoelectric element 26 generates electric power by vibration accompanying the rotation of the tire 18, and both terminals thereof are connected between AC input terminals of a rectifier circuit 27 in which four diodes are bridge-connected. The DC output terminal of the rectifier circuit 27 is connected between both terminals of the secondary battery 28 so that the AC output generated by the piezoelectric element 26 is converted into a DC output and applied to the secondary battery 28 for charging. ing.

The oscillator 29 outputs the abnormal state of the tire 18 as a radio wave signal from the antenna 15. The positive power input terminal is connected to the positive terminal of the secondary battery 28, and the negative power input terminal is four transistors. It is connected to the negative electrode terminal of the secondary battery 28 via the collector-emitters 30 to 33. The bases of the transistors 30 to 33 are connected to the positive terminal of the secondary battery 28 via the bias resistor 34. The oscillator 29 turns on the secondary battery 2 when any of the transistors 30 to 33 is turned on.
Power is supplied from 8 and an abnormality detection signal is output.

Of the four brackets 17, that is, the abnormality detection switches 13a to 13d, the abnormality detection switch 13a is connected to the negative terminal of the secondary battery 28, and the other three abnormality detection switches 13b to 13d.
Are respectively connected to the bases of the transistors 30 to 32, and the connection cable 24 connected to the air pressure sensor 14 is connected to the base of the transistor 33.

Next, the operation of this embodiment will be described with reference to the program flow chart shown in FIG. First, the operating principle of the transmitter 11 will be described. The transmission circuit 12 includes four abnormality detection switches 13a to 1
Since it is grounded via the 3d and the air pressure sensor 14, the hub nut 22 for fixing the wheel 19 of the tire 18 is normally fixed, and when the air pressure of the tire 18 is normal, the respective switches 13a to 13a. Since 13d and the air pressure sensor 14 are all in the ON state, both the emitter and the base of the transistors 30 to 33 are at the ground level, that is, the same potential. Therefore, the transistors 30 to 33 are all kept in the off state, the oscillator 29 is not supplied with power from the secondary battery 28, and the abnormality detection signal is not output.

In this state, if one of the hub nuts 22 loosens or falls off, the contact state with the bracket 17 is cut off, and the corresponding one of the abnormality detection switches 13a to 13d is turned off. That is, for example, when the abnormality detection switch 13a is turned off, the negative terminal of the secondary battery 28 is in a floating state, and a bias is applied between the base and emitter of the transistors 30 to 33 via the bias resistor 34. As a result, the transistors 30 to 33 are turned on and the oscillator 2
9 is fed, and the abnormality detection signal is transmitted to the antenna 1
It is output as a radio wave signal via 5.

Further, the abnormality detection switches 13b to 13
When d or the air pressure sensor 14 is turned off, the bases of the corresponding ones of the transistors 30 to 33 are floated from the ground level, and a bias is applied between the base and the emitter through the bias resistor 34. Like As a result, when the corresponding one of the transistors 30 to 33 is turned on, the oscillator 29 is powered in the same manner as described above, and the abnormality detection signal is output as a radio wave signal via the antenna 15.

When receiving power from a vehicle-mounted battery (not shown) or the like, the receiver 1 starts the security program shown in FIG. First, in step S1, the receiving device 1 determines whether or not the vehicle is in a traveling state. In this case, the receiving device 1 inputs the vehicle speed signal from the vehicle speed sensor 7 and determines whether or not the vehicle is traveling. When the automobile is running, the receiving device 1 displays "YES".
Then, the process proceeds to step S2 to determine whether or not the tire abnormality detection signal is received from the transmitter 11. If not, the process returns to step S1 and returns to step S1 to receive the tire abnormality detection signal. If so, the determination is “YES” and the process proceeds to step S3.

In this case, the fact that the receiving device 1 determines "YES" in step S2 means that the hub nut 22 of the tire 18 is loosened or dropped or the air pressure is lowered in the running state. The receiving device 1 drives the first alarm device 9 in step S3 to notify and prompt the driver in the vehicle interior by the buzzer, and then returns to step S1.

Next, when the automobile is not running,
The receiving device 1 determines “NO” in step S1 and proceeds to step S4. In step S4, the receiving device 1 determines whether or not the door lock signal is received from the radio wave key 2, and if not, determines “NO” and proceeds to step S5. In step S5, the receiving device 1 determines whether or not the door unlock signal is received from the radio wave key 2, and if not, "N" is received.
It judges that it is "O" and proceeds to step S6. Subsequently, the receiving device 1 determines in step S6 whether or not the tire abnormality detection signal is received from the transmitter 11. If not, the receiving device 1 returns to step S1 and returns to step S1 described above.
Repeat S4, S5 and S6.

In this state, for example, after the driver gets out of the car and closes the door, the lock switch 3 of the radio wave key 2
When is pressed, the receiving device 1 determines "YES" in step S4 and proceeds to step S7. If the door is closed, it determines "YES" and proceeds to step S8. , And applies a lock signal to the drive device 8a to cause the door lock mechanism 8 to perform a lock operation. Also,
When it is determined "NO" in step S7, the receiving device 1 returns to step S1.

By the way, when the receiving device 1 receives the lock signal from the radio wave key 2 and locks the door lock mechanism through step S8, step S9 is performed.
The alert mode shown below is entered. That is, the receiving device 1 determines in step S9 whether or not the door is opened based on the signal from the door courtesy switch 6, and if the door is closed, determines "NO" and determines in step S9.
Go to 10. In step S10, the receiver 1 determines whether or not the abnormality detection signal is transmitted from the transmitter 11 attached to the wheel 19 of the tire 18, and if not, determines “NO” and proceeds to step S11. move on. The receiving device 1 determines whether or not the door unlock signal is received from the radio wave key 2 in step S11, determines “NO” if not, returns to step S9, and then steps S9 to S11. Will be repeated.

Now, in this way, steps S9 to S1 are performed.
In the state where 1 is repeated, it is assumed that the vehicle is in a parked state with no driver, and the receiving device 1 operates as a warning mode operation for preventing theft or the like, for example, when an operation from the radio wave key 2 is performed. When the door is opened without receiving the lock signal, it is determined that the state is abnormal in step S9, the process proceeds to step S12, and a notification signal is given to the second alarm device 10 to notify the outside of the vehicle by the horn. .
Further, when the tire abnormality detection signal is received from the transmitter 11, the receiving device 1 determines "YE" in step S10.
If it is determined to be "S", the process proceeds to step S12, and the second alarm device 10 is made to perform the notification operation in the same manner.

When the receiving device 1 receives the unlock signal from the radio wave key 2 in a state where steps S9 to S11 are repeated, the receiving device 1 determines "YES" in step S11 and shifts to step S13. Here, an unlock signal is given to the drive device 8a to apply the door lock mechanism 8
Then, the lock operation is performed, and then the process returns to step S1 and the above steps are repeated.

In the above case, when the door of the automobile is locked, when the lock switch 3 of the radio wave key 2 is operated and the door lock signal is transmitted, the warning mode of steps S9 to S11 is entered. , Radio key 2
When the locking operation is performed mechanically by the key plate 2a, the receiving device 1 is in a state where the steps S1, S4, S5 and S6 are repeated. In this case, even if the tire abnormality detection signal is output from the transmitter 11, the warning operation to the outside of the vehicle is not performed. Further, when the unlock signal is received from the radio wave key 2 in such a state, the receiving device 1
Determines "YES" in step S5 and determines in step S1
3, the door lock mechanism is unlocked, and then the process returns to step S1.

According to this embodiment, the tire 18
The abnormality detection signal from the transmitter 11 indicating the abnormal state is also received by the receiving device 1 that receives the door lock and unlock signals from the radio wave key 2, so that a separate receiving device is provided. Can be configured at low cost.

Further, according to this embodiment, based on the tire abnormality detection signal received by the receiving device 1, the first alarm device 9 or the second alarm device 10 is activated depending on the state of the vehicle at that time. Since the alarm is output outside the vehicle or inside the vehicle by driving, an appropriate alarm is given to the user, so that the safety can be improved and the antitheft effect can be improved.

Further, according to this embodiment, the bracket 17 constituting the abnormality detecting switches 13a to 13d is
Since the insulating layer 17a is provided on the surface in contact with the wheel 19, the bracket 17 can be a switch that opens and closes only by the contact state with the hub nut 22, and when the hub nut 22 becomes loose, The contact state of No. 2 becomes defective, and the loosened state of the hub nut 22 can be detected at an early stage.

Further, according to the present embodiment, since the transmission circuit 12 of the transmitter 11 is provided with the detection switch having the above-mentioned configuration, the ground cannot be separately provided in the circuit configuration, so that all the abnormality detection switches 13a to 13d. Also, it is configured to be grounded via the air pressure sensor 14, and even in this case, when any switch is turned off, this can be detected, and four transistors are provided for five detection switches. Since the number of detection switches is 30 to 33, the number of transistors can be reduced by one with respect to the number of detection switches.

In the above embodiment, the case where a buzzer, a horn or the like is used as the first and second alarm devices 9 and 10 has been described, but the present invention is not limited to this and, for example, an alarm signal by radio waves is output to the outside. It is also possible to use an alarm device that operates, or to perform an alarm operation by blinking a headlight or the like at night.

[0036]

As described above, according to the tire abnormality warning device for a vehicle equipped with the remote control device of the present invention, the abnormal state of the tire of the vehicle is detected and the airborne signal for abnormality detection is transmitted. In addition to providing the receiver, the receiving device is configured to cause the alarm means to perform an alarm operation when the abnormality detection signal transmitted from the transmitter is received. The state of the vehicle such as the state where the vehicle is parked and there is no user or the state where the user is present can be received at low cost because the airborne signal for tire abnormality detection can be received and the door lock state can be determined by the receiving device The excellent effect that the alarm operation can be performed according to

[Brief description of drawings]

FIG. 1 is an electrical block diagram showing an embodiment of the present invention.

FIG. 2 is a vertical sectional side view showing the transmitter attached to a tire.

FIG. 3 is a front view of the same.

FIG. 4 is a vertical cross-sectional side view showing a mounting state of a bracket tip portion of a transmitter.

FIG. 5 is an electrical configuration diagram of a transmission circuit.

FIG. 6 Flowchart of security program

[Explanation of symbols]

1 is a receiving device, 2 is a radio wave key (operation key), 5 is an ignition switch, 6 is a door courtesy switch, 7 is a vehicle speed sensor, 8 is a door lock mechanism, 8a is a drive device, and 9 and 10 are first and second Alarm device (alarm means), 1
1 is a transmitter, 12 is a transmission circuit, 13 is an abnormality detection switch, 14 is an air pressure sensor, 17 is a bracket, 17a is an insulating layer, 18 is a tire, 19 is a wheel, 20 is a hub,
22 is a hub nut, 26 is a piezoelectric element, 27 is a rectifier circuit,
28 is a secondary battery, 29 is an oscillator, 30 to 33 are transistors, and 34 is a bias resistor.

Claims (1)

[Claims] 1. A remote control device comprising a receiving device for receiving an in-air propagation signal of unlocking or locking transmitted from an operation key, and unlocking operation by driving a door lock mechanism according to the receiving operation. In a vehicle configured to perform a locking operation, a transmitter for transmitting an aerial propagation signal of abnormality detection to the tire of the automobile by detecting an abnormal state of the tire is provided, and the receiving device is transmitted from the transmitter. A tire abnormality alarm device for a vehicle equipped with a remote control device, characterized in that when an abnormality detection signal is received, the alarm means is configured to perform an alarm operation.