JP2001270425A - Theft detection apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To deal with harassment to a vehicle or the like which differs from the theft of the vehicle, such as throwing stones to the vehicle from afar, and fully deal with malfunctions, such as detecting even vibrations caused by other vehicles or the like passing nearby. SOLUTION: This apparatus includes a vibration sensor 1 outputting a vibration detection signal on detecting vibration applied to a vehicle or the like, a transmission circuit 3 outputting a theft detection signal based on the vibration detection signal outputted from the vibration sensor 1, a human body sensor 2 outputting a human body detection signal on detecting the approach of a human to the vehicle or the like, and a control part 4 for controlling the operation of the sensors and the circuit. Normally, the control part 4 sets the detection sensitivity of the vibration sensor 1 at a low level; on receiving the human body detection signal outputted from the human body sensor 2 when the sensitivity is set at the low level, the control part changes the detection sensitivity of the vibration sensor 1 so that it is set at a higher level.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a passenger car, a commercial vehicle,
In anti-theft systems for large vehicles such as buses and trucks, as well as vehicles including agricultural and construction machines,
The present invention relates to a theft detection device which is means for detecting that a suspicious person has approached a vehicle or the like.

[0002]

2. Description of the Related Art As an example of a conventional anti-theft system, there are a theft detection device for detecting that a suspicious person has approached a vehicle or the like and outputting a theft detection signal, and a light or sound when the theft detection signal is received. And the like, and an alarm notification device that performs alarm notification.

[0003] As an example of this theft detection device, a vibration detection sensor that detects vibration generated when a person pryes a door of a vehicle or the like or gets on a vehicle or the like and outputs a vibration detection signal, Some include a transmission circuit that outputs a theft detection signal to an alarm notification device based on a vibration detection signal output from a vibration detection sensor.

[0004] By providing such an anti-theft system, when a thief of a vehicle or the like opens a door of the vehicle or the like in an attempt to steal equipment in the vehicle, for example, a theft detection attached to the vehicle or the like is detected. The device can detect an abnormality of a vehicle or the like due to vibration, and can issue an alarm by an alarm notifying device. When the owner of the vehicle or the like uses the vehicle or the like, the owner may get into the vehicle or the like after performing a predetermined remote control operation or the like to turn off the alarm notification device.

However, in the above-mentioned theft detection device,
Since the detection means is only a vibration detection sensor, its sensitivity is always set to a high sensitivity so that theft can be reliably prevented. For this reason, there is a problem that even a vibration generated when another vehicle or the like passes nearby is detected and a malfunction occurs. In particular, if a storage location of a vehicle or the like faces a wide road where a large vehicle such as a truck passes or a location where a train passes nearby, malfunctions frequently occur. .

Therefore, as a method for preventing such malfunction, a human body detection sensor and an impact (vibration) sensor are provided, and after a detection signal from the human body detection sensor, an impact (vibration) is detected.
There has been proposed a vehicle security alarm device that issues an alarm when a detection signal is received from a sensor (Japanese Patent Application Laid-Open No. 200-200).
0-6761).

[0007] According to this vehicle security alarm system, the detection by the shock (vibration) sensor is effective only after the human body detection sensor detects a person approaching the vehicle or the like. An erroneous operation due to vibrations or the like that occurs when an object or the like passes nearby can be reliably prevented.

[0008]

However, not only in situations such as theft, but also when a stone is thrown from a distance toward a vehicle or the like, the above-described vehicle security alarm device detects a human body. Therefore, there is a problem that even if vibration of a vehicle or the like due to such a stone throwing is detected, an alarm cannot be issued.

The present invention has been made to solve such a problem, and its object is to cope with harassment of a vehicle or the like different from the theft, such as throwing a stone from a distance toward a vehicle or the like. It is another object of the present invention to provide a burglary detection device that can sufficiently cope with a malfunction that has been a conventional problem, such as detecting even vibration generated when another vehicle or the like passes nearby.

[0010]

In order to solve the above-mentioned problems, a theft detecting device according to the present invention comprises a vibration detecting means for outputting a vibration detecting signal when detecting vibration applied to a vehicle or the like;
Transmitting means for outputting a theft detection signal based on the vibration detection signal output from the vibration detection means; human body detection means for outputting a human body detection signal when detecting that a person approaches a vehicle or the like; Control means for controlling the operation of the means, the control means normally set the detection sensitivity of the vibration detection means low, and in this setting state, upon receiving a human body detection signal output from the human body detection means, The detection sensitivity of the vibration detection means is switched so that the detection sensitivity of the vibration detection means is set high.

According to the present invention having such features,
When a person does not approach a vehicle or the like, the detection sensitivity of the vibration detecting means is low, but an alarm is issued when the vibration is detected. Therefore, for example, when a stone is thrown from a distance toward a vehicle or the like, the vibration caused by the stone can be reliably detected, and an alarm can be issued even in such a case. Further, when a person approaches, by increasing the detection sensitivity of the vibration detecting means, it is possible to reliably detect even a slight vibration such as tampering with a keyhole of a vehicle or the like.

Further, the theft detecting apparatus of the present invention is characterized in that the apparatus further comprises a detection sensitivity setting means capable of arbitrarily setting and changing the detection sensitivity of the vibration detecting means. In this way, the user can arbitrarily set the detection sensitivity of the vibration detection means,
If it can be changed, the detection sensitivity can be adjusted according to the place where the vehicle or the like is parked.

For example, when a vehicle or the like is parked in a quiet environment where there is almost no vibration of a vehicle or the like passing by the side or vibration of a train, the low sensitivity is set so as not to be so different from the high sensitivity (the low sensitivity is increased). ), The detection performance can always be kept high. On the other hand, when parking in a place that is subject to the vibration of a vehicle passing by or the vibration of a train, set the low sensitivity to a value lower than usual and set it so that these vibrations are not detected. Thus, malfunction due to such vibration can be prevented. This setting is for the user to arbitrarily set or change the detection sensitivity after arriving at the parking place, actually test whether or not the vibration detection means malfunctions, and then set the optimum detection sensitivity. Good.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the theft detection device of the present invention will be described with reference to the drawings.

FIG. 1 is an explanatory diagram showing one embodiment of the theft detection device of the present invention.

In the present embodiment, the theft detection device comprises:
A vibration detection sensor 1 that outputs a vibration detection signal when detecting vibration applied to a vehicle or the like on which the theft detection device is mounted, and a theft detection signal based on the vibration detection signal output from the vibration detection sensor 1. A transmitting circuit 3 as transmitting means for outputting, a human body detecting sensor 2 for outputting a human body detecting signal when detecting that a person approaches a vehicle or the like, and an operation control of these sensors 1 and 2 and the transmitting circuit 3 Control unit (for example, CPU (central process)
init unit)) 4 and a switching signal for switching the detection sensitivity of the vibration detection sensor 1 between two levels of high and low,
A detection sensitivity setting unit 5 that outputs an operation signal for arbitrarily setting and changing the high and low detection sensitivities is provided.

The vibration detecting sensor 1 is mounted on a vehicle body. In this embodiment, the vibration detection sensor 1
The detection sensitivity can be switched between two levels, high and low, and the control unit 4 performs this switching. Here, the low detection sensitivity is a sensitivity that does not detect vibration or the like generated when another vehicle or the like passes nearby. Here, the high detection sensitivity is the maximum sensitivity of the capability of the vibration detection sensor 1 here.

Normally, the control unit 4 sets the detection sensitivity of the vibration detection sensor 1 low, and in this setting state, upon receiving a human body detection signal output from the human body detection sensor 2,
The detection sensitivity of the vibration detection sensor 1 is switched so that the detection sensitivity of the vibration detection sensor 1 is set high.

As the human body detecting sensor 2, a conventionally used human body detecting sensor can be used. For example, a human body detecting sensor using infrared rays and a human body detecting sensor using ultrasonic waves are used. be able to. The place where the human body detection sensor 2 is installed may be a vehicle body, the periphery of a vehicle or the like (for example, a garage wall), or both the vehicle body and the vehicle. In addition, the number of the human body detection sensors 2 to be installed may be appropriately determined depending on a balance between the shape and size of the vehicle to be installed and the detectable range of the human body detection sensor 2. That is, the installation location and the number of the human body detection sensors 2 may be appropriately adjusted so as to reliably detect a person approaching a predetermined distance to the front, rear, left, right, and upper and lower peripheral portions of the vehicle or the like.

The transmitting circuit 3 may output a wireless signal such as an optical signal or a radio wave to the alarm notification device as a theft detection signal, or may output the theft detection signal to the alarm notification device through a signal line. It may be.

The detection sensitivity setting section 5 is an operation section for arbitrarily setting and changing the detection sensitivity of the vibration detection sensor 1 by arbitrarily operating by a user. The detection sensitivity can be changed by changing the reference voltage of the comparator constituting the vibration detection sensor 1 or operating the electronic volume.

The alarm notification device may be mounted around a vehicle or a vehicle, or may be provided at a place where a person is always on standby (for example, a security room).

Next, an example of the operation of the theft detection device will be described with reference to the drawings.

FIG. 2 is a flowchart showing an example of an operation example of the theft detection device shown in FIG.

When the user parks the vehicle or the like, the user operates the theft detection device to leave the vehicle or the like.

As a result, the theft detection device is in a state of always detecting the vibration of the vehicle body by the vibration detection sensor 1 (step S1). At this time, the detection sensitivity of the vibration detection sensor 1 is controlled by the control unit 4 as described above.
Low detection sensitivity is set. That is, in this state, since vibrations of a vehicle or the like passing by the side are not detected, a malfunction due to such unnecessary vibration detection can be prevented. On the other hand, for example, when a stone is thrown from a distance toward a vehicle or the like, vibration due to the stone can be reliably detected, and in this case, an alarm can be issued.

After parking, the user may operate the detection sensitivity setting section 5 to arbitrarily set or change the detection sensitivity of the vibration detection sensor 1. When the user does not operate the detection sensitivity setting unit 5, the high and low detection sensitivities of the vibration detection sensor 1 operate with the initially set detection sensitivity. ,
The vibration detection sensor 1 is in a state where even a slight vibration can be detected reliably.

Then, in this state, when the vibration is detected by the vibration detection sensor 1 (in the loop of steps S5 and S6, if it is determined Yes in step S6), the vibration detection sensor 1 Then, a vibration detection signal is output (step S8). Control unit 4
When receiving the vibration detection signal, the transmission circuit 4 outputs a predetermined signal to the transmission circuit 3, and the transmission circuit 4 outputs a theft detection signal to an alarm notification device (not shown) (step S9). As a result, the alarm notification device outputs an alarm sound.

On the other hand, during such a detecting operation (step S
5. In the loop of step S6), when a person is separated from the vehicle or the like by a predetermined distance or more (when determined as No in step S5), the human body detection sensor 2 stops outputting the human body detection signal. When the control unit 4 confirms that the human body detection signal is no longer input from the human body detection sensor 2, the control unit 4 switches the detection sensitivity of the vibration detection sensor 1 from the high detection sensitivity to the low detection sensitivity again (step S7), and performs the vibration detection. (Return to step S1).

As described above, according to the theft detecting apparatus of the present invention, when a person is not approaching a vehicle or the like, surrounding vibrations are detected by setting the vibration detection sensor 1 to a low detection sensitivity. While preventing such a malfunction, vibration applied to a vehicle or the like can be reliably detected. In addition, when a person approaches a vehicle or the like, the vibration detection sensor 1 is switched to a high detection sensitivity so that even a slight vibration can be reliably detected.

[0031]

According to the theft detecting apparatus of the present invention, when a person does not approach a vehicle or the like, the detection sensitivity of the vibration detecting means is low, but when a vibration is detected, an alarm is issued. ing. Therefore, for example, when a stone is thrown from a distance toward a vehicle or the like, the vibration caused by the stone can be reliably detected while preventing erroneous detection such as detecting the vibration of a vehicle passing nearby. An alarm can be issued in any case. Also, when a person approaches, by increasing the detection sensitivity of the vibration detection means,
Since even a slight vibration such as tampering with a key hole of a vehicle or the like can be reliably detected, theft can be reliably prevented.

Further, according to the theft detecting apparatus of the present invention, the user can arbitrarily set and change the detection sensitivity of the vibration detecting means. It can be adjusted to a suitable detection sensitivity.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing one embodiment of a theft detection device of the present invention.

FIG. 2 is a flowchart showing an example of an operation example of the theft detection device shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vibration detection sensor 2 Human body detection sensor 3 Transmission circuit 4 Control part 5 Detection sensitivity setting part

Claims (2)

[Claims] 1. A vibration detection means for outputting a vibration detection signal when vibration applied to a vehicle or the like is detected, a transmission means for outputting a theft detection signal based on the vibration detection signal output from the vibration detection means, A human body detection unit that outputs a human body detection signal when detecting that a person has approached a vehicle or the like;
Control means for controlling the operation of each of these means, wherein the control means normally sets the detection sensitivity of the vibration detecting means low, and receives a human body detection signal output from the human body detecting means in this setting state Wherein the detection sensitivity of the vibration detection means is switched so that the detection sensitivity of the vibration detection means is set high. 2. The theft detection device according to claim 1, further comprising a detection sensitivity setting unit that can arbitrarily set and change the detection sensitivity of the vibration detection unit.