KR102352344B1 - System for Detecting an Intruder - Google Patents

Abstract

The present invention relates to a system for detecting an intruder that includes: a transmitter for emitting microwaves and diffused infrared rays, and a receiver for receiving microwaves and diffused infrared rays from the transmitter to detect an intruder. It is possible to prevent malfunction due to weather conditions, small objects, and the like.

Description

Outdoor Intrusion Detection System {System for Detecting an Intruder}

The present invention relates to an outdoor intrusion detection system for detecting an external intruder by using an infrared method and a microwave method together. In particular, the present invention relates to an outdoor intrusion detection system capable of preventing false alarms by enlarging the beam divergence angle of infrared rays and expanding the detection space by installing a receiver and a transmitter separately.

In general, an outdoor intrusion detection system is a technology for detecting whether an object intruding from the outside exists even though it is forbidden to enter a specific space according to time or authority.

This outdoor intrusion detection system is installed around the security area.

Existing outdoor intrusion detection systems used vibration sensors, tension sensors, infrared sensors, and microwave sensors.

The complex detector using microwave and infrared disclosed in Republic of Korea Registered Utility Model 20-0344717 has a disadvantage in that the reception and transmission are installed in the same device, and the detection space is narrow, so it is easy to avoid intruders.

In addition, the composite sensor using microwaves and infrared rays disclosed in the preceding patent has a disadvantage in that it is difficult to use it for indoor or outdoor use.

In addition, the infrared ray disclosed in the prior patent has a disadvantage in that a malfunction occurs according to a change in the room temperature in a manner that monitors the operation of an intruder through temperature sensing.

In the case of the existing microwave sensing method, an alarm is also generated by electromagnetic interference by small animals, shaking of tree branches or doors, and movement of transport vehicles around the detection zone. there was.

In addition, in the case of the existing infrared sensing method (light quantity sensing method), the infrared beam width is narrow, so an alarm is generated even by falling leaves, snow or rain. there was.

Republic of Korea Registered Utility Model Publication 20-0344717 (Registered on March 02, 2004) Composite detector using microwave and infrared

An object of the present invention is to provide an outdoor intrusion detection system that increases the reliability of intrusion detection while preventing false alarms due to weather conditions, small objects, and the like.

In addition, the present invention is to provide an outdoor intrusion detection system that can detect an intruder over a wide range.

Outdoor intrusion detection system according to an embodiment of the present invention is an outdoor intrusion detection system including a transmitter for emitting microwaves and infrared rays and a receiver for receiving microwaves and infrared rays from the transmitter.

The transmitter includes a microwave transmitter that generates the microwave and transmits it to the receiver;

and an infrared ray transmitter for generating the infrared ray and transmitting the infrared ray to the receiver by diffusing the generated infrared ray.

The receiver receives the microwave and infrared rays transmitted from the transmitter, the amplitude or frequency of the received microwave waveform exceeds a preset threshold, and the received infrared light is less than or equal to a preset threshold There is an intrusion judge to be

In addition, the microwave transmitter may include an antenna that emits microwaves and a reflector that is disposed on a rear surface of the antenna to receive microwaves radiated from the antenna and transmit them toward the receiver.

The infrared transmitter may include an infrared light source emitting the infrared light and a light diffusion lens disposed in front of the infrared light source to diffuse a beam width of the infrared light generated from the infrared light source.

A lens insertion hole into which the light-diffusing lens is inserted may be formed in one surface of the reflector, the infrared light source may be disposed on a rear surface of the reflector, and the light-diffusion lens may be disposed on a front surface of the infrared light source.

The outdoor intrusion detection system according to an embodiment of the present invention has the advantage of providing an outdoor intrusion detection system that can prevent malfunction of intrusion detection by weather conditions or small objects using microwaves and diffused infrared rays.

1 shows a sensing width and a sensing distance of an outdoor intrusion detection system according to an embodiment of the present invention.
2 is a block diagram of an outdoor intrusion detection system according to an embodiment of the present invention.
3 is an exploded view of a transmitter according to an embodiment of the present invention.
4 is an inside of a transmitter according to an embodiment of the present invention.

Since the embodiments according to the concept of the present invention may have various changes and may have various forms, the embodiments will be illustrated in the drawings and described in detail herein. However, this is not intended to limit the embodiments according to the concept of the present invention to specific disclosed forms, and includes all modifications, equivalents, or substitutes included in the spirit and scope of the present invention.

Terms such as first or second may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one element from another element, for example, without departing from the scope of the present invention, a first element may be called a second element, and similarly The second component may also be referred to as the first component.

When an element is referred to as being “connected” or “connected” to another element, it is understood that it may be directly connected or connected to the other element, but other elements may exist in between. it should be On the other hand, when it is mentioned that a certain element is "directly connected" or "directly connected" to another element, it should be understood that no other element is present in the middle. Other expressions describing the relationship between elements, such as "between" and "immediately between" or "neighboring to" and "directly adjacent to", etc., should be interpreted similarly.

The terms used herein are used only to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present specification, terms such as “comprise” or “have” are intended to designate that the described feature, number, step, operation, component, part, or a combination thereof exists, and includes one or more other features or numbers. , it is to be understood that it does not preclude the possibility of the existence or addition of steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present specification. does not

Hereinafter, the present invention will be described in detail by describing preferred embodiments of the present invention with reference to the accompanying drawings.

Outdoor intrusion detection system according to an embodiment of the present invention includes a receiver 200 and a transmitter (100).

<Sender (100)>

The transmitter 100 according to an embodiment of the present invention includes a microwave transmitter 110 and an infrared transmitter 120 .

1. Microwave transmitter 110

The microwave transmitter 110 according to an embodiment of the present invention includes an antenna 111 that generates microwaves, and a reflector 112 that receives microwaves radiated from the antenna 111 and reflects them toward the transmitter 100 . do.

The antenna 111 radiates microwaves in the form of a metal bar. The frequency of the microwave radiated from the antenna 111 may be in a band of 20 GHz to 25 GHz. Preferably, the frequency of the microwave may be 24.125 GHz.

The reflector 112 may be disposed on the rear surface of the antenna 111 to receive microwaves radiated from the antenna, reflect the microwaves, and transmit them toward the receiver 200 .

A lens insertion hole into which a light diffusion lens 122 to be described later can be inserted may be formed in the reflection plate 112 .

Microwaves emitted from the microwave transmitter 110 toward the receiver 200 according to an embodiment of the present invention may form a sensing region in the form of a rotating long ellipsoidal surface.

2. Infrared transmitter 120

The infrared transmitter 120 according to an embodiment of the present invention includes an infrared light source 121 that emits infrared rays, and a light diffusion lens 122 that diffuses the infrared rays generated by the infrared light source 121 .

The light source 121 may be disposed on the rear surface of the reflection plate 112 , and the light diffusion lens 122 may be inserted into the lens insertion hole of the reflection plate 112 .

The light diffusion lens 122 is disposed on the front surface of the infrared light source 121 to diffuse the infrared beam emitted from the infrared generator and radiate it toward the transmitter 100 .

Infrared rays used in the existing infrared intrusion detection method have a narrow beam width, so there is a disadvantage that intrusion is detected even by snow, rain, fallen leaves, small birds, etc., but the present invention uses the light diffusion lens 122 Intrusion detection erroneous operation in the above-described situation can be prevented by spreading.

<Receiver 200>

The receiver 200 according to an embodiment of the present invention may include a microwave receiver 210 , an infrared receiver 220 , a controller 230 , and an alarm unit 240 .

1. Microwave receiver 210

The microwave receiver 210 receives the microwave transmitted from the microwave transmitter 110 , and transmits the received microwave waveform to the controller 230 .

When an intruder passes through the sensing region, the waveform of the microwave received by the microwave receiver 210 is different from the waveform of the microwave transmitted from the microwave transmitter 110 . That is, when the intruder passes through the sensing region, the amplitude and/or frequency of the microwave changes significantly.

The microwave receiver 210 transmits the received microwave waveform to the controller 230 .

2. Infrared receiver 220

The infrared receiver 220 receives infrared rays emitted from the light diffusion lens 122 , and transmits the amount of infrared rays to the controller 230 .

When an intruder passes through the sensing region, the amount of infrared light received by the infrared receiver 220 is reduced than the amount of infrared light transmitted through the light diffusion lens 122 . The infrared receiver 220 transmits the received infrared light amount signal to the controller 230 .

3. Control 230

The controller 230 receives the microwave waveform received from the microwave receiver 210 and receives the infrared light quantity signal received from the infrared receiver 220 .

The controller 230 may store in advance the amplitude and frequency of the microwaves radiated from the antenna 111 . Also, the controller 230 may store in advance the amount of infrared light generated by the light source 121 of the infrared transmitter 120 .

The control unit 230 is the amplitude and/or frequency of the microwave received from the microwave receiver 210 is out of a preset threshold, and when the amount of infrared light received from the infrared receiver 220 is smaller than a preset threshold It can be determined that there is an intrusion into the sensing area.

That is, the controller 230 determines that there is an intrusion when both the received microwave amplitude and/or frequency and the infrared light quantity are less than or equal to a preset value. That is, the controller 230 determines that there is an intrusion only when the received microwave waveform deviates from a preset threshold and the amount of received infrared light is lower than the preset threshold.

Conversely, when the amplitude and/or frequency of the received microwave does not deviate from a set value and only the amount of received infrared light is less than a set value, the controller 230 does not determine that there is an intrusion. In addition, the control unit 230 does not determine that there is an intrusion even when the amplitude and/or frequency of the received microwave deviates from the set value, but the amount of received infrared light does not deviate from the set value.

When it is determined that there is an intrusion into the sensing region as described above, the control unit 230 generates an alarm driving signal for controlling the alarm unit 240 to generate an alarm, which will be described later, and transmits it to the alarm unit 240 .

When the amount of received infrared light is 0.5 or less when the amount of infrared light generated by the light source 121 of the infrared generation unit is set to 1, the control unit 230 has an intrusion in the infrared sensing method. can be judged as

In addition, the beam width of the infrared rays may be 0.03 to 0.2 m.

The sensing distance L according to an embodiment of the present invention may be 10m to 100m. In addition, the sensing width of microwaves may be 0.5 to 1.5 m, and the sensing width of infrared rays may be 0.03 to 0.2 m.

Here, the sensing distance L means the distance from the receiver 200 to the transmitter 100 . In addition, the sensing width means the maximum length of the microwave or infrared beam width.

The microwave intrusion detection method has a disadvantage in that, when the microwave is transmitted through the liquid, it is determined that the liquid is an intruder and malfunctions. In particular, when the microwave sensing method is applied outdoors, there is a disadvantage in that a water film is formed on the transmitter in case of heavy rain or malfunctions by detecting raindrops as an intruder. In addition, the microwave intrusion detection method has a disadvantage in that the sensing reliability is lowered even by electromagnetic interference caused by shaking of nearby tree branches or movement of a vehicle.

Therefore, there is a disadvantage in that it is difficult to accurately sense an intruder using only the microwave sensing method.

In order to supplement the microwave intrusion detection method, the microwave intrusion detection method and the infrared intrusion detection method were used together by reducing the amount of infrared light.

However, the conventional infrared beam width is only 0.1 mm, so the sensing width is narrow, and the amount of infrared light received by the receiver is reduced even by snow, rain, hail, small birds, etc., so that it detects an intruder and malfunctions.

In the present invention, the light diffusion lens 122 is disposed on the front side of the infrared light source 121 from which infrared rays are generated in order to supplement the existing infrared light quantity reduction sensing method. The infrared rays generated by the infrared light source 121 are diffused by the light diffusion lens 122 , and the infrared beam width is increased and transmitted toward the receiver 200 .

Accordingly, in the present invention, the amount of infrared light reduced by snow, rain, small birds, etc. is reduced by the conventional infrared sensing method. As a result, when snow, rain, small birds, etc. pass through infrared rays, they are not sensed as intruders, so there is an advantage in that manpower and time due to malfunction are reduced.

4. Alarm unit 240

The alarm unit 240 of the present invention notifies the detection of intrusion to the outside when receiving an alarm driving signal from the control unit 230 . Preferably, the alarm unit 240 may generate a visual or audible alarm to the outside, or may transmit an intrusion detection signal to an administrator's terminal.

According to an embodiment of the present invention, the alarm unit 240 may be provided with a plurality of LEDs, and a light informing an intrusion warning may be emitted from the LEDs.

Claims (3)

In an outdoor intrusion detection system comprising a transmitter 100 for emitting microwaves and infrared rays and a receiver 200 for receiving microwaves and infrared rays emitted from the transmitter 100,
The transmitter 100 is
A microwave transmitter 110 that generates the microwave and transmits it to the receiver 200;
and an infrared transmitter 120 that generates the infrared rays, spreads the generated infrared rays and transmits them to the receiver 200,
The receiver 200 is
Receives microwaves and infrared rays transmitted from the transmitter 100,
The amplitude or frequency of the received microwave waveform is out of a preset threshold,
It is determined that there is an intrusion when the amount of received infrared light is less than a preset threshold,
The microwave transmitter 110 is
An antenna 111 emitting microwaves and
and a reflector 112 disposed on the rear surface of the antenna 111 to receive microwaves radiated from the antenna 111 and transmit them toward the receiver 200,
The infrared transmitter 120 includes an infrared light source 121 that generates the infrared
A light diffusion lens 122 disposed on the front of the infrared light source 121 to diffuse the beam width of the infrared light generated from the infrared light source 121,
A lens insertion hole into which the light diffusion lens 122 is inserted is formed on one surface of the reflection plate 112,
The infrared light source 121 is disposed on the rear surface of the reflector 112,
The light-diffusion lens 122 is an outdoor intrusion detection system, characterized in that disposed in front of the infrared. delete delete

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