JP2002208074A - Theft prevention system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a theft prevention system by which a large-volume sound signal is emitted and information that a person falls on theft is directly transmitted to surrounding dwellers and passers-by as maintaining its small size and low power consumption. SOLUTION: The theft prevention system is characterized by providing a driving unit 1 having a piezo element fixed to a component part 80 of a theft prevention object and to impart vibration to the component part based on signal pressure to be impressed, a recording means 2 to record sound information to take a suppression effect of the theft, a sensor 3 to detect a motion of a doer of the theft, a reproducing means 4 to reproduce the recorded sound information, a control means 5 to control the reproducing means 4 and an amplifier 6 to amplify the reproduced sound information and to supply a driving signal to the driving unit 1 via a conversion transformer, defining the component part 80 as a diaphragm and emitting the sound signal from the whole of it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-theft system provided in an automobile, a house, and the like.

[0002]

2. Description of the Related Art Conventionally, an anti-theft system provided on a security object such as an automobile detects a movement of a burglar by a detecting means such as a vibration sensor provided at an appropriate position of the object, and a piezoelectric device provided separately. It is common to emit a loud alarm from the buzzer to the surroundings to draw attention to passers-by and residents.

[0003]

By the way, such an alarm sound generally means the occurrence of some kind of emergency. However, simply by hearing the alarm sound, the situation of a specific situation or Its importance cannot be easily grasped. Therefore, although it has a psychological deterrent effect on the theft, it is immediately and clearly understood by the surrounding residents and passersby whether the object is actually stolen or broken. I couldn't do that.

[0004] Therefore, if a sound is issued instead of the buzzer warning sound, it is possible to more directly inform nearby residents and passers-by that the object is being stolen. Although it is considered possible, the conventional piezoelectric piezoelectric buzzer has a diaphragm that emits a buzzer sound, and because of its structure that functions as a sounding body, the sound pressure level in the low range is extremely low, and the sound quality can be controlled. At present, it is used only as a buzzer or microphone ignoring sound quality because of its small size, and it has not been possible to adopt it as a speaker that emits sound at a high volume.

[0005] Further, if a general dynamic type acoustic speaker which converts an electric signal into an acoustic signal by arranging a voice coil in a magnetic field of a magnet is employed, it is possible to generate voice information, but it is possible. In order to draw attention to the local residents and passers-by by the sound volume, the size was unavoidable, the power consumption increased, and it could not be actually adopted.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and can emit a loud sound signal while maintaining small size and low power consumption. The purpose of the present invention is to provide an anti-theft system that can directly convey information that the user is in the wrong place.

[0007]

The inventor of the present invention has made intensive studies to solve the above-mentioned problems. As a result, the vibration plate is used as a component of the security object to which the drive unit is fixed, thereby achieving low power consumption. The present inventors have found that a large-volume audio signal can be emitted while using power and a small piezo element, and have completed the present invention.

That is, the present invention provides one or a plurality of drive units each having a piezo element fixed to a component of a security object and applying vibration to the component based on an applied signal pressure, and a theft deterrent effect. Recording means for recording voice information playing, detecting means for detecting an operation of a burglar, reproducing means for reproducing voice information recorded in advance, and said reproducing means based on a detection signal transmitted from the detecting means. Control means for controlling the reproduced audio information,
It comprises an amplifier for supplying a drive signal to the drive unit via a conversion transformer, and when detecting the operation of a burglar, the component itself of the crime prevention object is used as a diaphragm, and the Provided is an anti-theft system that emits an audio signal having a theft deterrent effect from the whole.

In such an anti-theft system,
Since the component of the security object is a diaphragm, the sound pressure level is maintained over a wide range of sound, while using a small piezo-type drive unit with low power consumption, simple structure, and clear sound at high volume. A signal can be emitted, and information indicating that the vehicle has been stolen can be directly transmitted to nearby residents and passers-by, and the deterrent effect against theft can be further enhanced.

Here, it is preferable that a thin plate-shaped piezoelectric ceramic made of lead zircon titanate (PZT) is used as the piezoelectric element, and the piezoelectric ceramic has a bimorph structure in which an electrode member located at the center is sandwiched from above and below. Is preferred.

Further, when the drive unit is constructed by sealing the entire piezoelectric element and the electrode section for applying a signal pressure thereto with a resin in a water-tight manner, the durability is improved, and accordingly, the mounting position is reduced. The degree of freedom is greatly improved.

[0012] Further, in the case where the emission of the voice signal is mute-controlled until a predetermined time elapses from the input of the detection signal of the detection means, the noise and misunderstanding to the inhabitants and passers-by can be prevented beforehand. Can be avoided.

When the security object is an automobile, and a drive unit is fixed to a vehicle body panel such as a hood, which is a component of the automobile, high-volume sound information can be directly emitted from the body of the automobile.

When the security object is a house, and a drive unit is fixed to a door or window glass of an entrance or exit, which is a component of the house, a large part of the door or window glass that a burglar attempts to invade directly. In this case, it is preferable that the detection means is an abnormality detection sensor provided in a keyhole of the door lock device.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an overall configuration diagram of an anti-theft system according to the present invention. FIGS. 1 to 5 show a typical embodiment of the present invention, in which reference numeral 1 denotes a drive unit, and 80 denotes a drive unit. The components of the security object to be fixed are shown.

The anti-theft system S according to the present invention is shown in FIG.
As shown in FIG. 2 and FIG. 2, a drive unit 1 having a piezo element 10 fixed to a component 80 constituting the security object itself and applying vibration to the component 80 based on an applied signal pressure. ,..., A recording unit 2 for recording audio information having a theft deterrent effect, a sensor 3 as a detecting unit for detecting an operation of a burglar, and a reproducing unit 4 for reproducing the recorded audio information. , A control means 5 for controlling the reproducing means 4 based on a detection signal transmitted from the sensor 3, and amplifying reproduced audio information and driving the amplified audio information to the driving units 1,. When the operation of the burglar is detected by the sensor 3, the component 80 of the security object is used as a diaphragm and the whole of the component 80 is provided. Stealing from Audio signals to achieve the deterrent effect of those emitted.

The drive unit 1 includes a piezo element 10 having a piezoelectric effect. More specifically, as shown in FIGS. 3 and 4, two thin disk-shaped piezoelectric plates made of lead zircon titanate are used. A bimorph structure 1a in which the same disk-shaped electrode plate 12 having a larger diameter is sandwiched between the ceramics 11, 11 is adopted. After wiring is applied to each electrode portion, the whole is watertight. Is sealed with resin. If such a piezo-type drive unit 1 is used, it can be driven with a simple structure with few structural components and with low loss and low power consumption as compared to a general dynamic type acoustic speaker, and does not use a magnet. Therefore, there is no influence of magnetism, and the components to be vibrated and the fixing position of the drive unit can be freely selected. In the present embodiment, each of the piezoelectric ceramics 11 and 11 and the electrode plate 12 has a structure in which the piezoelectric ceramics 11 and 11 and the electrode plate 12 are supported at the center portion. For example, it may be supported at the periphery or other places. Instead of the bimorph structure 1a, a unimorph structure using one piezoelectric ceramic may be employed.

As shown in FIG. 2, the drive unit 1 has one side adhered and fixed to the inner surface of a bonnet 90, which is a component of the automobile 9, and when the signal pressure is applied, the bonnet 90 is closed. Vibration is applied to the hood 90 to make the hood 90 a diaphragm, from which an audio signal is emitted. As a means for fixing the drive unit 1, various fixing means such as a double-sided tape and a bracket can be adopted. Further, from the viewpoint of further improving the security effect, it is preferable that the drive unit 1 is provided at a plurality of places on the security object 8 so that a burglary cannot be easily removed. In the case of No. 9, it is preferable to provide the drive units 1 at a plurality of locations selected from a body panel such as a fender portion, a door portion, and a roof portion, a window glass, and other components in addition to the hood 90. .

The recording means 2, the reproducing means 4, the control means 5 having a one-chip control microcomputer, and the amplifier 6 are housed in a car 9 in a single housing, and are unitized to prevent vehicle theft. The device A is provided in a place that is difficult for a thief to see, such as under a seat, and an external switch,
Signals from the human body sensor 3, the lock system of the automobile 9, the key input unit, the side brake sensor, and the like are input to the control unit 5 via the input interface unit, and the electric power of the 12V battery normally mounted on the vehicle is used. Each part operates.

Further, inside the vehicle anti-theft device A,
An audio recording / reproducing unit 20 functioning as the recording unit 2 and the reproducing unit 4 is provided. In this audio recording / reproducing unit 20, audio information composed of a preset fixed phrase is recorded. A preferred embodiment is one that is configured to allow free recording.

The voice information recorded in the voice recording / reproducing unit 20 is a specific word having an effect of deterring theft, which is completely different from the buzzer sound generated by the conventional vehicle anti-theft device. By issuing the words to passers-by and the like, the driver is directly alerted, and theft is effectively prevented. Specifically, "Dorobo ...
・ ”,“ This car is a stolen car. Please report to the police. ”,“ My car number “Osaka OOmi OOOO” has been stolen. Please report to the police. ” Is recorded. The human body sensor 3 of this example is for detecting a burglar who has entered the vehicle interior, and is installed at an appropriate place in the vehicle interior that cannot be seen from the outside. It has been prevented beforehand.

Hereinafter, the operation of the vehicle anti-theft system will be described with reference to FIG.

When the user stops the car 9, applies the side brake, removes the key, gets off the car, and locks the door of the car 9, the external switch is turned on and the timer of the control means 5 is activated, and the predetermined time is set. After measurement, it enters the monitoring state. The reason for providing such a predetermined time is that the user himself / herself is detected by the sensor 3 immediately after the lock, and the voice recording / reproducing unit 2
This is to avoid starting 0, and it is preferable that the predetermined time can be adjusted or selected by the user himself or herself. In this example, the timer is automatically activated when the lock system is turned on. However, regardless of the lock system, the timer may be activated when an external switch provided in the vehicle compartment is turned on. Also, a preferred embodiment is one in which a remote control type external switch is carried by the user, and a timer of the control means received when the ON signal of the switch is transmitted is started.

Next, when the human body sensor 3 detects a human body in the monitoring state, the audio information recorded in advance in the audio recording / reproducing section 20 is reproduced. When the reproduction of the audio information is started, a timer is started at the same time, and the generation of the audio is controlled to be muted until a predetermined time elapses after the detection signal of the sensor is input. This considers the time until the user stops the malfunction when the human body sensor 3 detects the operation of the user instead of the theft, and the sound controlled by the weak sound is It is radiated from the hood 90 or the like of the automobile via the drive unit 1, but it is also preferable to output the sound from an existing speaker in the automobile.

When the predetermined time during which the low-pitched sound is controlled elapses, the volume of the sound signal radiated from the hood 90 or the like gradually increases, and the above-described theft deterrent effect is exerted from the entire vehicle body of the automobile 9 thereafter. Specific words will be repeated. The emission of the audio signal does not stop even if the engine is stopped unless the external switch is turned off.

In the above description, the vehicle antitheft system in which the security object 8 is the automobile 9 has been described. However, the present invention is not limited to this. Facilities, facilities, etc. are subject to security. For example, as shown in FIG. 6, when the house 9A is the security object 8, the drive unit 1 is attached to one or more components selected from the door 90A of the entrance and the window glass or the like. A system is preferable, and the detecting means for detecting the operation of the burglar is preferably constituted by an abnormality detecting sensor provided in a keyhole of a door lock device 91 for locking and unlocking the door 90A.

[0028]

As described above, according to the anti-theft system of the present invention, a loud sound signal can be radiated while maintaining the small size and low power consumption of the drive unit, and the surrounding residents and passers-by can be avoided. In addition, it is possible to directly transmit information indicating that a theft has been encountered, and it is possible to enhance the deterrent effect against theft.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an anti-theft system according to a typical embodiment of the present invention.

FIG. 2 is an explanatory view showing a state in which a drive unit is fixed to the back side of the hood of the automobile.

FIGS. 3A and 3B are explanatory diagrams showing a drive unit. FIGS.

FIGS. 4A and 4B are explanatory diagrams showing a piezo element having a bimorph structure.

FIG. 5 is a signal waveform diagram illustrating an operation in the anti-theft system.

FIG. 6 is an explanatory view showing a modification in which a drive unit is fixed to an entrance door of a house.

[Explanation of symbols]

 S Anti-theft system A Vehicle anti-theft device 1 Drive unit 1a Bimorph structure 2 Recording means 3 Sensor 4 Reproduction means 5 Control means 6 Amplifier 7 Conversion transformer 8 Security object 9 Automobile 9A House 10 Piezo element 11 Piezoelectric ceramic 12 Electrode plate 80 Components 90 Bonnet 90A Door 91 Door lock device 20 Voice recording / reproducing unit

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H01L 41/08 U (72) Inventor Yoshimasa Kano 3-7-12 Minamihorie, Nishi-ku, Osaka-shi Maison knob 201 F term ( Reference) 5C084 AA02 AA04 AA07 AA09 BB40 CC19 CC31 DD79 EE01 EE06 GG42 GG43 HH02 HH03 HH12 5C087 AA02 AA03 AA32 AA37 AA42 BB22 DD05 DD13 DD24 EE05 EE07 FF04 GG03 GG04 GG66

Claims (8)

[Claims] 1. A single or a plurality of drive units each having a piezo element fixed to a component of a security object and applying vibration to the component based on an applied signal pressure, and a sound for deterring theft. Recording means for recording information; detecting means for detecting the movement of a thief; reproducing means for reproducing pre-recorded audio information; and controlling the reproducing means based on a detection signal transmitted from the detecting means. Control means; and an amplifier for amplifying the reproduced audio information and supplying a drive signal to the drive unit via a conversion transformer. An anti-theft system wherein the part itself is a diaphragm and emits an audio signal having an effect of deterring theft from the whole of the constituent part. 2. The anti-theft system according to claim 1, wherein the piezo element is a thin plate-shaped piezoelectric ceramic made of lead zircon titanate. 3. The anti-theft system according to claim 2, wherein the drive unit has a piezoelectric ceramic bimorph structure. 4. The theft prevention device according to claim 1, wherein the drive unit is formed by sealing the whole of the piezo element and an electrode portion for applying a signal pressure to the piezo element with a resin in a watertight manner. system. 5. The anti-theft system according to claim 1, wherein the emission of the audio signal is mute-controlled until a predetermined time elapses after the detection signal of the detection means is input. 6. The anti-theft system according to claim 1, wherein the security object is an automobile, and a drive unit is fixed to a vehicle body panel such as a bonnet, which is a constituent part thereof. 7. The anti-theft system according to claim 1, wherein the security object is a house, and a drive unit is fixed to a door or window glass of a doorway as a constituent part thereof. 8. The anti-theft system according to claim 7, wherein said detection means is an abnormality detection sensor provided in a keyhole of a door lock device.