KR101799334B1 - Wall Disappear and Invasion Sensing Device and Method thereof - Google Patents

Abstract

The present invention provides a method for detecting wall fading and a fingertip detection method using an infrared light source, comprising the steps of calculating a basic image based on an IR LED light source, filtering the calculated image to remove noise, Storing a reference value in a memory; diverting the IR light source to a sensing surface; imaging a sensing surface of the camera and calculating a difference value between the received image value and a reference value stored in the memory; Calculating a change amount by calculating a total value of the binarized pixels; and determining whether or not an alarm is issued based on the change amount.

Description

Technical Field [0001] The present invention relates to a wall dismounting and a chip dismounting sensor unit using an infrared light source and a wall discovery and invasion sensing device and method thereof,

The present invention can detect a wall surface to be sensed using IR LEDs on a module basis. By analyzing data of a light source coming in frame units, it is possible to determine whether a wall is lost in a sensing area and whether an intruder is present.

A conventional technology related to the present invention is a vibration sensor for detecting a vibration of a room by damaging or deforming a wall and detecting a vibration of the room, a tension detector for detecting an intrusion by changing a wire tension by attaching a wire to a wall, And an infrared detector that detects intrusion when blocking using a beam. In the above, the vibration sensor can directly detect the damage of the wall, but in the case of the prefabricated panel, there is a possibility of false alarm due to weak vibration and in case of the tension detector, the wire installation position can be confirmed, In the case of an infrared ray detector, there is a possibility of a false alarm due to wild animals.

The prior art related to the present invention is disclosed in Korean Patent No. 10-1415652 (published on Jul. 07, 2014). 1 is a block diagram of a security device for detecting external intrusion according to the related art. 1, a conventional security device for detecting an external intrusion includes at least one sensor frame 110, at least one connection frame 120, and a signal processing frame 130. The sensor frame 110, the connection frame 120, and / or the signal processing frame 130 can be detached (or separated) from each other using a connector 111, ). In addition, the sensor frame 110 includes a detachable sensor 112 to output a sensed or measured signal from the sensor 112. [ The sensor 112 may be an external sensing sensor 112 installed to face the object to be installed by the security device 100, for example, a window, have. For example, the sensor 112 may include a heat ray sensor 112 for detecting a change in the heat from the outside of the crime prevention apparatus 100, an ultrasonic sensor 112 for detecting an external approach using ultrasonic waves, An infrared sensor 112 capable of detecting an intruder or the like from the outside, and the like. In addition, the sensor 112 may be a motion sensor 112 for sensing movement of the security device 100 itself. For example, a tilt sensor 112 for detecting a slope change of the crime prevention apparatus 100 itself or an acceleration sensor 112 for detecting an acceleration of the crime prevention apparatus 100 according to movement of the crime prevention apparatus 100. These sensors 112 are detachably attached to one sensor frame 110 so as to detect the intrusion from the outside of the target object or the outside of the target object. Preferably, the external sensor 112 and the motion sensor 112 are included in the sensor frame 110 in order to adapt to various external environments for detecting external intrusion, The combination of the sensed signal values can be used to determine whether an intruder is intruded or not. The security device 100 may include at least one of the sensor frames 110 and preferably at least one of the external detection sensors 112 and the motion detection sensors 112 . The connection frame 120 connects the signal line sensed by the sensor frame 110 to another connection frame 120 or the signal processing frame 130 so as to configure the security device 100. The connection frame 120 may also include a connector 111 at the end of the connection frame 120 so as to be coupled to and detachable from the other connection frame 120 or the sensor frame 110 or the signal processing frame 130 Lt; / RTI > Of course, the specific connection frame 120 may be such that the connector 111 is different from the connector 111 of the sensor frame 110, or this connector 111 may be omitted. The signal processing frame 130 also converts the sensed signal output from the sensor 112 of the sensor frame 110 directly to the sensor frame 110 or from the connection frame 120 via a connected signal line into a signal value And detects whether or not an external invasion is caused therefrom. This signal processing frame 130 preferably includes a processor 134 to enable the processor 134 to determine whether to enter or exit.

In order to solve the above problems, the present invention is to reduce false alarms generated in a vibration sensor, a wire detector, and an infrared ray detector and to accurately detect intrusion or theft by judging a wall disappearance. Another object of the present invention is to make an image using the light source of the IR LED, to judge whether the image is changed through the algorithm, and to detect the wall disappearance and the penetration regardless of the external illumination.

According to an aspect of the present invention, there is provided a method for detecting wall fringing and a method for detecting a fringe using an infrared light source, comprising the steps of: calculating a basic image with an intensity value including coordinate information based on an IR LED light source; A step of storing the filtered image as a reference value in a memory, a step of diverging the IR light source to a sensing surface, a step of photographing the sensing surface of the camera, Calculating a difference value between the obtained final image value and a reference value stored in the memory, and calculating a difference value by binarizing the difference value based on the threshold value Calculating a change amount by obtaining a total amount value of the binarized pixels; And a step of determining whether or not the image is displayed on the display unit.

The wall disappearance and cue detection system using the infrared light source of the present invention and the intrusion detection method using the system can reduce an error of intrusion detection and detect an intrusion caused by loss of a wall.

1 is a block diagram of a security device for detecting external intrusion,
FIG. 2 is a block diagram of a wall disconnection and a chip-on-a-chip sensor unit using the infrared light source of the present invention,
FIG. 3 is a flow chart illustrating a control method for detecting a wall disappearance and a chip using the infrared light source of the present invention,
FIG. 4 is an irradiation state diagram of the sensing surface and IR LED light applied to the present invention,
FIG. 5 is a diagram showing the state of the sensor unit installed on the sensing surface,
FIG. 6 is a view illustrating a state in which the wall disappearance sensor is installed according to the present invention,
FIG. 7 is an explanatory diagram of a detection example of a motion detection sensor applied to the present invention;
FIG. 8 shows another embodiment of the present invention in which a plurality of IR LEDs are disposed and an optical sensing area is set by combining.

2 to 8, a wall-disposing and cushion-detecting sensor unit using the inventive infrared light source having the above-described object will be described with reference to FIGS. 2 to 8. FIG.

FIG. 2 is a block diagram of a wall disconnection and a chip sensor detecting unit using the infrared light source of the present invention. 2, an IR LED light transmitter 50 for receiving a pulse from a pulse generator and transmitting pulse-shaped light to a sensing surface, A pulse generator 40 for generating pulses; a pulse generator for generating pulses; a pulse generator for generating pulses; an IR LED optical transmitter for transmitting pulses; The IR LED transmits the light to the sensing face, calculates a base image with an intensity value including coordinate information based on the IR LED light source information (presence or absence of a light source), filters the estimated image to remove noise, And stores the calculated image in the memory 60 as a reference value. The controller 60 controls the camera to receive the image information of the sensing surface, And calculates the difference value between the final image value obtained by filtering and calculating the intensity value including the coordinate information with respect to the received image and the reference value stored in the memory, And receives the calculated difference value and transmits the calculated difference value to the binarization unit 80 so as to binarize the difference value with reference to the limit value. The total value of the binarized pixels is calculated to calculate a variation amount, A main control unit 30 for judging whether or not an alarm has been issued and an alarm unit 10 for inventing an alarm under the control of the main control unit. In addition, in the above description, a detection sensor for detecting the disappearance of a wall may be added to the detection sensor unit, and a motion detection sensor for detecting the movement of the wall may be added. The detection sensor unit may include a control signal And may be controlled.

FIG. 3 is a flowchart illustrating a control method for detecting a wall disappearance and a chip using an infrared light source according to the present invention. In FIG. 3, the wall disappearance method and the chip detection method using the infrared light source of the present invention include a step S11 of calculating a basic image with an intensity value including coordinate information based on the IR LED light source information, A step S13 of storing the filtered image as a reference value in a memory S13, a step S14 of diverting the IR light source to a sensing surface S12, (S15) of acquiring a final image value by calculating an image using the intensity value including the coordinate information and digitally filtering the received image by the sensing sensor unit (S15) (S16) of calculating a difference value between a value and a reference value stored in the memory, a step (S17) of binarizing the difference value based on the limit value, (S18) of calculating a change amount by obtaining a total amount value of the binarized pixels, and determining (S19) whether or not an alarm is issued based on the change amount. In step S11, an image including an IR light source information and an environment image are classified into two types. An environmental image, i.e., an image without an IR light source is used to acquire a reference value and is used to remove external noise. In the above, the image may be represented by x _k (m, n) as an intensity value including coordinate information, where k is a unique image number, and m and n are the addresses of the pixels. In addition, the image _{x AK (m, n) =} x 2k + 1 (m, n) if may be represented, there is no light source in _{x pK (m, n) =} x 2k (m, n) When the IR light source As shown in FIG. In the above, the sign A means active, that is, the light source is diverted, meaning that it is stored in an odd-numbered frame in the frame, P means that there is no passive or light source, and is stored in an even-numbered frame in the frame. However, the ideal image is the noise portion can not be obtained due to noise, r _k (m, n) by the pure signal part of e _k (m, n) as expressed final image x _k (m, n) represents = e _k (m, n) + r _k (m, n). Also, the image obtained after the digital filter processing in step S12

to be. In the above, h (i, j) is a digital filter having a coordinate difference between L _i and L _j , and y _k (m, n) is an image obtained after filter processing. In the above, L _i and L _j indicate the size of a specific filter and can be, for example, 3x3 and 5x5. Also, the digital filter may be a Gauss filter or a rect filter, and when the dispersion is σ,

인 것이다.

.

Also, the final image y _k (m, n) obtained in the above is stored in the memory as a reference value.

After generating the reference value as described above and storing it in the memory, the light is transmitted from the IR LED light source to the sensing surface in the form of a pulse, the sensing surface is photographed by the camera, and the received image is filtered to obtain the final image value . In step S16, the difference value between the final image value and the reference value is

S (m, n) = y _ak (m, n) - y _pk (m, n).

In addition, the step S17 may obtain a binary image based on the threshold value with respect to the difference value. The binary image may include:

B (m, n) = 1, S (m, n)? U,

       = 0, S (m, n) < U

Where U is the limit value.

Further, it is possible to determine the type of the binary image, B (m, n), or the total number of pixels obtained as described above to detect the amount of change and finally determine whether or not an alarm has been issued. In addition, the reference value (area and the number of pixels) can be set by learning for a predetermined time at the initial setting, and the threshold value can also be applied differently considering the surrounding environment.

Also, in the present invention, since the IR light source is used, a visible light cut-off filter must be installed in the receiver, which is intended to block noise due to normal visible light and increase SNR. In addition, the camera exposure time can be adjusted to reduce the influence from external light sources. The noise and environment filter process can be minimized by the integration of hardware configuration and software.

4 is an irradiation state diagram of a sensing surface and an IR LED light applied to the present invention. In FIG. 4, the IR LED light emitted to the sensing surface, i.e., the side to be sensed, is emitted in the form of a pulse toward the sensing surface from the IR LED light source configured in the sensing sensor unit.

FIG. 5 is a view showing the state of a sensing sensor unit installed on a sensing surface according to the present invention. 5, the light emitted from the IR LED light source of the detection sensor unit is irradiated on the sensing surface, which is the surface to be sensed in FIG. 5, and the camera formed on the side of the LED light source senses the sensing surface and receives the sensed image.

6 is a state in which the wall disappearance sensor is installed according to the present invention. 6 (a) is an installation state of a wall disappearance sensor installed on a wall, (b) shows a state when a wall is lost, and a connection line for detecting a wall loss is short- It is a configuration that can be performed. When the wall disappearance is detected as described above, the main control unit of the detection sensor unit receives the connection information of the connection line (the minute current flows through the connection line and the short-circuit information may be an example) And may be configured to issue an alarm at the unit.

FIG. 7 is a view for explaining a sensing example of a motion detection sensor according to the present invention. In FIG. 7, the motion detection sensor according to the present invention can sense the rotation of the wall sensor when the wall disappearance can not be detected by the connection line, and can be used as an auxiliary means for detecting the wall disappearance.

FIG. 8 shows another embodiment in which a plurality of IR LEDs according to the present invention are disposed and an optical sensing area is set by combining. (A) is a side view, and FIG. 8 (b) is a plan view in which a plurality of IR LEDs are arranged to form an optical sensing area by arranging a plurality of IR LEDs according to the present invention in FIG. The optical sensing area generated by the IR LED should be smaller than the field of view (FOV) of the camera, and an auxiliary LED of the visible light band may be utilized to confirm the sensing area during installation.

10: an alarm unit, 20: a camera unit,
30: main control unit, 40: pulse generating unit,
70: Difference value calculation unit, 80: Binarization unit

Claims (15)

1. A wall disposal and cementation sensor using an infrared light source for monitoring a wall of a certain area,
The wall disappearance and cue detection sensor unit using the infrared light source,
An IR LED light transmitter 50 for receiving a pulse from the pulse generator and transmitting pulse-shaped light to the sensing surface;
A camera unit (20) for photographing a sensing surface and receiving a photographed image;
A pulse generating section (40) for generating a pulse;
The pulse generator generates a pulse and transmits the pulse generated by the pulse generator to the IR LED optical transmitter so that the IR LED transmits the light to the sensing surface, intensity value, calculates a base image based on the intensity value, filters and filters the image to remove the noise, and stores the calculated image as a reference value in the memory 60. Then, And controls the synchronization with the IR LED optical transmission unit. The intensity value is calculated as an intensity value including the coordinate information with respect to the received image, and the difference value between the final image value acquired by filtering and the reference value stored in the memory is supplied to the difference value calculation unit 70, and receives the calculated difference value, and transmits the calculated difference value to the binarization unit 80, Controlled to the binarization on the basis of the limit value for the difference value, calculated on the total value of the binarized pixel calculating the amount of change, and the main control section 30 to determine whether the alarm triggered on the basis of the change amount;
And an alarm unit (10) for issuing an alarm according to the control of the main control unit.
The method according to claim 1,
The wall disappearance and cue detection sensor unit using the infrared light source,
And a dropout detection sensor for detecting the disappearance of the wall. The wall disappearance and chip detection sensor unit using the infrared light source.
The method according to claim 1,
The filter,
Wherein the infrared light source is a Gauss filter or a rect filter.
3. The method of claim 2,
The wall disappearance and cue detection sensor unit using the infrared light source,
And a motion detection sensor for detecting a motion of the wall. The wall disappearance and chip detection sensor unit using an infrared light source.
A method for detecting wall fading and chips using an infrared light source for monitoring a wall of a certain area,
The method for detecting a wall disappearance and a chip using the infrared light source,
Calculating a base image with an intensity value including coordinate information based on the IR LED light source (S11);
Filtering (S12) an image to remove noise;
A step (S13) of storing an image calculated by filtering in a memory as a reference value;
Diverging the IR light source to the sensing surface (S14);
(S15) of photographing the sensing surface of the camera, calculating the received image as the intensity value including the coordinate information, and filtering the obtained intensity value to obtain the final image value;
Calculating a difference value between the obtained final image value and a reference value stored in the memory (S16);
Binarizing the difference value based on the threshold value (S17);
Calculating a total amount of binarized pixels and calculating a variation amount (S18);
And determining (S19) whether or not an alarm is issued based on the amount of change.
6. The method of claim 5,
In step S11,
An image including an IR light source information and an environmental image, and an environment image, that is, an image without an IR light source, is used to acquire a reference value, and a base image is an intensity value including coordinate information, x _k (m, n) Wherein the infrared light source is used to detect a wall disappearance and a chip detection method.
Where k is the unique image number, and m and n are the addresses of the pixels.
6. The method of claim 5,
The image obtained after digital filtering in step S13,

Wherein the infrared light source is used to detect a wall disappearance and a chip.
Here, x _k (m, n) is the intensity values including coordinate information on the image, h (i, j) are the coordinates difference in the L _i and L _j I digital filter, L _i, L _j is a particular filter K is the unique image number, and m and n are the addresses of the pixels.
6. The method of claim 5,
In step S16,
Wherein S (m, n) = y _ak (m, n) - y _pk (m, n).
Where y _ak (m, n) is the obtained final image value, and y _pk (m, n) is the reference value stored in memory.
In claim 5,
The step (S17) of binarizing the difference value based on the limit value includes:
B (m, n) = 1, S (m, n)? U,
= 0, S (m, n) < U
Wherein the infrared light source is used to detect a wall disappearance and a chip.
B (m, n) is the binary image, S (m, n) is the difference between the acquired final image value and the reference value, and U is the limit value.
6. The method of claim 5,
The filtering,
A Gauss filter, or a Rect filter.
The method according to claim 6,
Wherein the image including the IR light source information includes:
x _AK (m, n) = x _{2k + 1} (m, n)
The image without the IR light source,
x _pK (m, n) = x _2k (m, n).
Where _xKK (m, n) is an intensity value including coordinate information for an image when an IR light source is present, x _pK (m, n) is an intensity value including coordinate information for an image when there is no light source, and m , and n is the address of the pixel.
delete A method for detecting wall fading and chips using an infrared light source for monitoring a wall of a certain area,
The method for detecting a wall disappearance and a chip using the infrared light source,
Based on the IR LED light source, the filtered basic image value and the IR LED light are emitted to the sensing surface for the basic image represented by the intensity value of the pixel address, Wherein the filtered final image value is calculated and binarized with respect to the difference value between the final image value and the basic image value, and a change amount of the binarized pixel is calculated to determine whether the wall is lost or not. Loss and Chip Detection Method
14. The method of claim 13,
The filtering may include:
A Gauss filter, or a Rect filter.
15. The method of claim 14,
Gauss filter,

Wherein the infrared light source is used to detect a wall disappearance and a chip.
Where h (i, j) is a digital filter with a difference in coordinates between L _i and L _j , L _i , L _j is the size of a particular filter, and σ is variance.

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