JP3847459B2 - Vehicle anti-theft device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an in-vehicle antitheft device. More specifically, the present invention relates to an in-vehicle antitheft device that can reduce noise caused by malfunction.
[0002]
[Prior art]
Conventionally, as an example of an in-vehicle antitheft device, an apparatus having an antitheft sensor, a high volume alarm device, and a low volume sound generator has been proposed as disclosed in Japanese Utility Model Publication No. 1-337322. Yes.
[0003]
Such an anti-theft device can select the sound generator with a small volume as an output means instead of an alarm device according to the magnitude of the impact when an abnormality such as a person entering the car occurs. It is composed of.
[0004]
[Problems to be solved by the invention]
However, in the conventional vehicle antitheft device, the alarm device and the sound generator are selected according to the strength of the impact, and the sound is output, but at that time, the impact is great when a person collides with it. When it is detected as an impact, there is a problem that sound is output at a large volume despite a malfunction.
[0005]
Furthermore, the sound output from the anti-theft device is sufficient as long as the intruder can be surprised and dissipated. However, in the conventional anti-theft device, the alarm device and the sounding device continue to sound and the surroundings are disturbed. At the same time, there is a problem that the power source connected to the alarm device or the sound generator is consumed.
[0006]
The present invention has been made to solve the above problems, and provides an in-vehicle antitheft device capable of preventing an alarm sound or the like from continuing to sound even when a malfunction or impact continues. The task is to do.
[0007]
[Means for Solving the Problems]
The invention described in claim 1 according to the present invention, which has been made to solve the above-mentioned problems, includes a plurality of detection means 1a, 1b, 1c for detecting events occurring in a vehicle such as an intrusion to the vehicle from the outside and an impact. In the vehicle antitheft device having, an alarm that issues an alarm based on the detection signal of the detection means 1a, 1b, 1c when any of the detection means 1a, 1b, 1c detects the occurrence of one event The control means 3 is provided to reduce the sensitivity of the detection means when the same event has occurred after the predetermined time has elapsed after the alarm device has operated and the alarm device has issued an alarm for a predetermined time. Features. In this way, when any one of the plurality of detection means 1a, 1b, 1c detects the occurrence of one event, the alarm device is operated, and after the alarm device issues a warning for a certain time, the certain time has elapsed. If the same event occurs later, the control means 3 is provided to reduce the sensitivity of the detection means, so that the sensitivity of the detection means in the event of a malfunction that occurs after the fixed time elapses. Can be prevented so that malfunctions are not repeated.
Here, the alarm device is a concept including not only an alarm device that generates sound, but also a light emitting device that generates light, a device that generates vibration, a device that generates a minute current, and the like. Sound, light, vibration, etc. generated by the device.
The events detected by the detecting means are vibration, battery voltage, room lamp voltage, vehicle body inclination, and the like.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the in-vehicle antitheft device of the present invention, and FIG. 2 is a flowchart showing an embodiment of the operation of the in-vehicle antitheft device.
[0012]
In FIG. 1, reference numeral 1a denotes a vibration sensor as detection means for detecting vibration applied to the vehicle. Reference numeral 1b denotes a voltage sensor as a detecting means for detecting displacement of the vehicle battery voltage, and reference numeral 1c denotes a room lamp voltage sensor as detecting means for detecting the displacement of the room lamp voltage.
[0013]
The vibration sensor 1a, the voltage sensor 1b, and the room lamp voltage sensor 1c are connected to the microprocessor 3, and the results detected by the respective sensors are input to the microprocessor 3.
[0014]
2a, 2b, and 2c respectively indicate a horn, a horn, and a headlight as an alarm device that generates an alarm in response to an output signal of any one of the vibration sensor 1a, the voltage sensor 1b, and the room lamp voltage sensor 1c. .
[0015]
The horn 2a, horn 2b, and headlight 2c are connected to output control circuits 4a, 4b, 4c, respectively, for controlling the magnitude of the output, and the horn 2a, horn 2b, headlight 2c The output control circuits 4a, 4b and 4c are connected to a microprocessor as control means.
[0016]
The microprocessor 3 is connected to a power source 5 that supplies power necessary for driving the microprocessor 3. The power source 5 may be a car battery or an external power source such as a battery.
[0017]
Further, the microprocessor 3 is connected to an antenna 8 through an amplifier circuit 6 and a mixer 7, and the operation of the microprocessor 3 can be remotely operated by a remote controller 9 (hereinafter simply referred to as a remote controller) having an antenna 10. It is configured as follows.
[0018]
Except for horn 2b and headlight 2c described above, vibration sensor 1a, voltage sensor 1b, room lamp voltage sensor 1c, horn 2a, microprocessor 3, output control circuits 4a, 4b, 4c, amplifier circuit 6, mixer 7 and antenna 8 Thus, the in-vehicle antitheft device according to the present invention is configured.
[0019]
Next, an embodiment of the operation of the in-vehicle antitheft device configured as described above will be described with reference to FIGS. In the present embodiment, description will be made assuming that vibration is detected.
[0020]
First, a switch of the in-vehicle antitheft device is turned on by the remote controller 9 so that the antitheft device is activated.
When the vibration sensor 1a detects the vibration (see S1 in FIG. 2), a signal indicating the detection is transmitted to the microprocessor 3. The microprocessor 3 outputs a sound for about one second from the horn 2a based on the signal (see S2 in FIG. 2).
[0021]
When the sound output from the horn 2a is output a predetermined number of times, for example, 100 times (see S3 in FIG. 2) (that is, when vibration is continuously detected for a predetermined time), the microprocessor 3 outputs to the output control circuit 4 A control signal is input to reduce the output of the horn 2a (see S4 in FIG. 2).
[0022]
Then, after the output of the horn 2a is reduced, when vibration is continuously detected after a predetermined time has elapsed (see S5 in FIG. 2), a control signal is issued to the vibration sensor 1a by the microprocessor 3, and the vibration sensor 1a is detected. Is reduced (see S6 in FIG. 2).
[0023]
In this way, the microprocessor 3 can select to reduce the output of the horn 2a and to reduce the sensitivity of the vibration sensor 1a. It can be configured so as not to react with respect to.
[0024]
When the vehicle owner uses the vehicle, the antitheft device is turned off by the remote control 9 so as not to malfunction.
[0025]
In the above embodiment, the case where the vibration is detected by the vibration sensor 1a has been described. However, when the voltage sensor 1b detects the displacement of the battery voltage, or when the intruder opens the door, the room lamp voltage sensor 1c When voltage displacement is detected, the input of the voltage sensor 1b and the room lamp voltage sensor 1c may be blocked (that is, sensitivity is reduced) so that the horn 2a is not output.
[0026]
Further, in the above embodiment, the case where the horn 2a is operated as the alarm device has been described. However, the horn 2a is replaced with the horn 2b to generate a sound, or the headlight 2c is blinked. They can also be used in combination.
[0027]
Furthermore, the alarm device is not limited to the above, and can be appropriately changed, for example, a light emitting device such as an LED that generates light, a device that generates vibration, a device that generates a minute current, and the like.
[0028]
Further, the detection means is not limited to the above-described vibration sensor, voltage sensor, and room lamp voltage sensor, and for example, a gyro for detecting the inclination of the vehicle body can be used.
[0029]
In the above embodiment, the anti-theft device can be switched on and off with the remote control. However, the sensitivity of the sensor such as the vibration sensor is reduced, the size of the alarm such as the horn, etc. It is possible to reduce or to be able to carry out with a remote control.
[0030]
Further, the output can be reduced step by step (for example, three steps), so that the sound can be output for a time sufficient to surprise the intruder and dissipate.
[0031]
In such a case, if the reduction of the output is repeated three times and the vibration is still detected even if the output finally becomes zero, the microprocessor 3 issues a control signal to the vibration sensor 1a, and the vibration It can be controlled by the microprocessor 3 so that the sensitivity of the sensor 1a is reduced.
[0032]
【The invention's effect】
According to the vehicle antitheft device according to the present invention, it is possible to prevent the alarm device from continuing to operate even in the case of malfunction.
Therefore, it is possible to prevent the power source from being consumed carelessly.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an embodiment of an in-vehicle antitheft device according to the present invention.
FIG. 2 is a flowchart showing one embodiment of the operation of the in-vehicle antitheft device according to the present invention.
[Explanation of symbols]
1a Vibration sensor 1b Voltage sensor 1c Room lamp voltage sensor 3 Microprocessor

Claims (1)

In the vehicle anti-theft device having a plurality of detection means (1a, 1b, 1c) for detecting an event such as an intrusion to the vehicle from the outside and an impact such as an impact, respectively, the plurality of detection means (1a, 1b, 1c) ) Activates an alarm device that issues an alarm based on the detection signal of the detection means (1a, 1b, 1c) when the occurrence of one event is detected, and the alarm device issues an alarm for a certain period of time. An in-vehicle antitheft device comprising a control means (3) for reducing the sensitivity of the detection means when the same event has occurred after the predetermined time has elapsed after the occurrence.

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