JP3836350B2 - Vehicle anti-theft device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle antitheft device.
[0002]
[Prior art]
Conventionally, as a vehicle theft device, there are a device that detects a vibration of the vehicle and issues an alarm, and a device that prevents theft by means for identifying the owner.
[0003]
[Problems to be solved by the invention]
However, these antitheft devices are expensive because they require a dedicated system.
[0004]
Therefore, an object of the present invention is to provide a vehicle theft prevention device that can be realized at low cost.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a vehicle antitheft device according to claim 1 is provided on a plurality of wheels of a vehicle, respectively, and a wheel speed sensor that detects the rotation of each wheel;
Alarm means;
On the basis of a signal representing the rotation of the wheels inputted from the wheel speed sensors, e Bei and control means for controlling said alarm means,
The control means includes
When a signal indicating the rotation of the wheel is received only from the wheel speed sensor disposed on either the front wheel or the rear wheel of each wheel, or the wheel speed sensor disposed on each wheel. The alarm means is activated when a signal representing the rotation of the wheel is received from only one of the wheel speed sensors .
[0006]
In the first aspect of the present invention, the control means controls the alarm means based on a signal representing the rotation of the wheel input from the wheel speed sensor. Therefore, according to this invention, the vehicle antitheft device can be constructed by using the wheel speed sensor equipped on the vehicle. For example, as the wheel speed sensor, a wheel speed sensor included in an antilock brake system that is provided as a standard in a vehicle can be used.
[0007]
In the first aspect of the invention, when the control means receives a signal representing the rotation of the wheel only from the wheel speed sensor disposed on either the front wheel or the rear wheel of the wheels, The alarm means is activated. The state where only the front wheel or the rear wheel of the vehicle is rotating occurs, for example, when the vehicle is being moved by a tow truck. Therefore, it is possible to prevent theft of the vehicle such as movement by the tow truck.
[0008]
In the first aspect of the present invention, when the control means receives a signal representing the rotation of the wheel only from any one of the wheel speed sensors disposed on the wheels, the control means Activate the alarm means. The state where only one of the plurality of wheels of the vehicle is rotating occurs, for example, when an operation for removing the wheel is being performed. Therefore, it is possible to prevent the wheel from being stolen.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.
[0010]
In FIG. 1, the structure of embodiment of the vehicle antitheft device of this invention is shown. This embodiment is an antitheft device for an automobile, and uses four wheel speed sensors 4a to 4d included in an antilock brake system (ABS) included in the automobile. Of these four wheel speed sensors 4a to 4d, the two wheel speed sensors 4a and 4b detect the rotation of the two front wheels, and the other two wheel speed sensors 4c and 4d detect the rotation of the two rear wheels. To detect.
[0011]
The four wheel speed sensors 4 a to 4 d are connected to the abnormality detection controller 7 via the switch 6, and output signals representing wheel rotation from the switch 6 to the controller 7. The controller 7 is connected to an operation switch 8 and controls on / off of the operation switch 8. When the operation switch 8 is off, the circuit from the battery 3 to the abnormality alarm horn 9 is cut off. On the other hand, when the operation switch 8 is turned on and the trigger switch 2 linked to the switch 6 is connected to the abnormality detection circuit side C, power is supplied from the battery 3 to the abnormality alarm horn 9, An alarm sound is emitted from the abnormality alarm horn 9.
The trigger switch 2 may be installed at a location where it is difficult to find the vehicle, for example, so that only the owner can easily operate it. Alternatively, the trigger switch 2 may be switched between the ABS control controller 1 side and the abnormality detection circuit side C in conjunction with turning on and off of the ignition key.
[0012]
The abnormality detection controller 7 is connected to various interlock mechanisms 5 such as doors and seats, and an interlock signal is input from the interlock mechanism 5.
[0013]
The abnormality detection controller 7 identifies whether the vehicle is in the normal mode or the abnormal mode according to the interlock signal and the signal indicating the rotation of the wheel from the wheel speed sensors 4a to 4d. For example, a switch that operates in response to opening and closing of a door of an automobile is activated, and an interlock signal indicating that a switch that is activated when seated on a seat is activated is input to the controller 7 and then a signal that indicates rotation of a wheel. Is input to the controller 7 from the wheel speed sensors 4a to 4d, the controller 7 identifies that it is in the normal mode. On the other hand, when the interlock signal is not input to the controller 7 but a signal indicating the rotation of the wheel is input to the controller 7, the controller 7 identifies that it is in an abnormal mode.
[0014]
In the four wheel speed sensors 4a to 4d, when the trigger switch 2 and the switch 6 are connected to the ABS (anti-lock brake system) control controller 1 side, the ABS operates. That is, the four wheel speed sensors 4 a to 4 d detect the rotation speed of each wheel and output a signal representing the rotation speed to the ABS control controller 1.
[0015]
On the other hand, when the trigger switch 2 is connected to the abnormality detection circuit C side and the switch 6 is connected to the abnormality detection controller 7 side, this embodiment is shown in the flowcharts shown in FIGS. Therefore it works.
[0016]
That is, in step S <b> 1, each of the four wheel speed sensors 4 a to 4 d detects the rotation speed of each wheel and outputs a signal representing the rotation speed to the abnormality detection controller 7.
[0017]
In step S2, the controller 7 determines the mode. That is, it is determined whether the vehicle is in the normal mode or the abnormal mode. If it is determined that the vehicle is in the abnormal mode, the process proceeds to step S3. If it is determined that the vehicle is in the normal mode, the process proceeds to step S11 in FIG.
[0018]
More specifically, for example, in this step S2, as shown in FIG. 4, in step S101, it is determined whether or not the door switch is turned on based on the interlock signal input from the interlock 5 and turned on. If it is determined, the process proceeds to step S102, and it is determined whether or not the seat switch is turned on based on the interlock signal. If it is determined in this step S102 that it is turned on, the controller 7 determines that it is in the normal mode, and proceeds to step S11. On the other hand, if it is determined in step S101 and step S102 that the switch is not turned on, the process proceeds to step S3.
[0019]
In step S3, the controller 7 determines whether or not the four wheels are rotating and the rotation speeds are substantially equal based on signals representing the rotation speeds input from the four wheel speed sensors 4a to 4d. To do. As a result, if it is determined that the four wheels are rotating at substantially constant speed, the process proceeds to step S4, and it is determined that the vehicle is in the self-sustained travel mode, and the process proceeds to step S9 in FIG.
[0020]
On the other hand, if NO is determined in step S3, the process proceeds to step S5, and it is determined whether or not the two wheels are rotating at substantially constant speed and the remaining two wheels are substantially stopped. As a result, if it is determined that only the two wheels are rotating at substantially constant speed, the process proceeds to step S6, where it is determined that the tow truck movement mode is selected, and the process proceeds to step S9 in FIG.
[0021]
On the other hand, if it is determined NO in step S5, the process proceeds to step S7. In step S7, it is determined whether or not the three wheels are substantially stopped and the remaining one wheel is rotating. As a result, if it is determined that only the remaining one wheel is rotating, the process proceeds to step S8, the tire theft mode is determined, and the process proceeds to step S9.
[0022]
In step S9, it is determined whether or not it is the theft mode. If it is determined that the theft mode is selected, the process proceeds to step S10, where the controller 7 turns on the switch 8 to drive the abnormality alarm horn 9 and Generate sound. At the same time, an alarm signal may be transmitted to the owner by wireless communication using a horn or using communication means. When step S10 ends, the process proceeds to step S11.
[0023]
The determination as to whether or not it is in the theft mode is, for example, when the key of the car owned by the owner is not inserted into the ignition key hole of the car, it is determined that the mode is theft and the key is changed to the ignition key. If it is plugged in, it is determined that it is not the theft mode. In addition, for example, whether or not it is the theft mode may be determined based on whether or not a switch in which only the owner knows the installation location is turned on.
[0024]
If it is determined in step S9 that it is not the theft mode, the process proceeds to step S11. Also, if it is determined as NO in step S7, the process proceeds to step S11.
[0025]
In step S11, the controller 7 determines whether or not the switch 2 is connected to the abnormality detection circuit C side and the switch 6 is connected to the abnormality detection controller 7 side. As a result, if it is determined that the connection is made, the process returns to step S1.
[0026]
As described above, according to this embodiment, the abnormality detection controller 7 operates and does not operate the abnormality alarm horn 9 on the basis of the signal representing the rotation of the wheels input from the wheel speed sensors 4a to 4d. ON / OFF of the operation switch 8 that determines the above is controlled. Therefore, according to this embodiment, the vehicle antitheft device can be constructed by using the wheel speed sensors 4a to 4d of the antilock brake system equipped in the automobile.
[0027]
Further, in this embodiment, the abnormality detection controller 7 is configured to detect the wheel only from the two wheel speed sensors 4a, 4b or 4c, 4d disposed on either the front wheel or the rear wheel of the wheels. When a signal indicating rotation is received, it is determined that the tow truck movement mode is set. At this time, if the controller 7 determines that the vehicle is in the theft mode, the controller 7 turns on the operation switch 8 to operate the abnormal alarm horn 9 to generate an alarm sound. The warning sound can warn the theft and alert the passerby and owner that the theft has been performed. Thereby, it is possible to prevent theft.
[0028]
Further, in this embodiment, the abnormality detection controller 7 receives a signal representing the rotation of the wheel only from any one of the wheel speed sensors 4a to 4d disposed on each wheel. Sometimes, it is determined that the tire theft mode.
[0029]
At this time, if the controller 7 determines that the vehicle is in the theft mode, the controller 7 turns on the operation switch 8 to operate the abnormal alarm horn 9 to generate an alarm sound. The warning sound can warn the theft and alert the passerby and owner that the theft has been performed. This can prevent theft of tires or wheels.
[0030]
In the above-described embodiment, in step S2, whether the normal mode or the abnormal mode is determined is determined based on whether the door switch and the seat switch are sequentially turned on. Various combinations are possible for the determination. For example, when the steering wheel lock of the automobile is released and the side brake is released, it can be determined that the normal mode is set. In the above embodiment, in step S9, it is determined that the theft mode is not set when the key is inserted into the ignition key hole. However, when the dedicated switch is provided and the dedicated switch is turned on, the theft mode is set. It may be determined that it is not the theft mode when it is turned off. This dedicated switch may be arranged in a place (for example, in a glove box) that cannot be easily known by anyone other than the owner, and may be turned on when the owner leaves the vehicle. Moreover, in the said embodiment, the existing horn may be employ | adopted as the abnormality alarm horn 9, and a dedicated electronic horn may be used. Furthermore, as alarm means, not only sound but also light (flash light etc.) may be used together, and theft may be notified to the receiver such as a mobile phone possessed by the owner by radio signal. Good. In the above-described embodiment, an example in which the vehicle is an automobile has been described.
[0031]
【The invention's effect】
As apparent from the above, in the vehicle antitheft device according to the first aspect of the present invention, the control means controls the alarm means based on the signal representing the rotation of the wheel input from the wheel speed sensor. Therefore, according to this invention, the vehicle antitheft device can be constructed by using the wheel speed sensor equipped on the vehicle. For example, as the wheel speed sensor, a wheel speed sensor included in an antilock brake system that is provided as a standard in a vehicle can be used.
[0032]
In the first aspect of the present invention, when the control means receives a signal representing the rotation of the wheel only from a wheel speed sensor disposed on either the front wheel or the rear wheel of the wheels. Activating the alarm means. The state where only the front wheel or the rear wheel of the vehicle is rotating occurs, for example, when the vehicle is being moved by a tow truck. Therefore, it is possible to prevent theft of the vehicle such as movement by the tow truck.
[0033]
In the first aspect of the present invention, when the control means receives a signal representing the rotation of the wheel only from any one of the wheel speed sensors disposed on the wheels, The alarm means is activated. The state where only one of the plurality of wheels of the vehicle is rotating occurs, for example, when an operation for removing the wheel is being performed. Therefore, it is possible to prevent the wheel from being stolen.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of an embodiment of a vehicle antitheft device of the present invention.
FIG. 2 is a diagram showing the first half of a flowchart showing the operation of the embodiment.
FIG. 3 is a diagram showing the latter half of the flowchart.
FIG. 4 is a flowchart specifically showing an example of step S2 of the flowchart.
[Explanation of symbols]
1 ... ABS control controller, 2 ... Trigger switch, 3 ... Battery,
4a-4d ... wheel speed sensor, 5 ... interlock, 6, 8 ... switch,
7 ... Controller for abnormality detection, 9 ... Abnormal alarm horn.

Claims (1)

A wheel speed sensor that is disposed on each of the plurality of wheels of the vehicle and detects the rotation of each wheel;
Alarm means;
On the basis of a signal representing the rotation of the wheels inputted from the wheel speed sensors, e Bei and control means for controlling said alarm means,
The control means includes
When a signal indicating the rotation of the wheel is received only from the wheel speed sensor disposed on either the front wheel or the rear wheel of each wheel, or the wheel speed sensor disposed on each wheel. A vehicle antitheft device characterized in that the alarm means is activated when a signal representing the rotation of a wheel is received from only one of the wheel speed sensors .

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