KR101073468B1 - Sensing apparatus of moving way with infrared - Google Patents

Abstract

The present invention analyzes the set boundary line movement by detecting the infrared rays emitted from the human body by the time difference value at the same distance from the near and far distance, in particular, the sensor means for detecting the infrared rays emitted from the human body, by analyzing the detection signal based on the boundary line Means for outputting and visually displaying an alarm signal when moving in the selected direction, mirror lens means for amplifying and reflecting infrared rays collected from each zone divided into four upper and lower directions in two directions, respectively; By the partition wall means which separates infrared rays guided in two directions to the left and right directions in a separated state, the boundary line movement direction is accurately detected within the detection area of the sensor irrespective of near and far distances, It is effective to analyze.

Infrared, moving, boundary line, pyroelectric sensor, mirror, concave mirror, PCB, LED

Description

SENSING APPARATUS OF MOVING WAY WITH INFRARED}

The present invention detects infrared rays (INFRARED) emitted from the human body to detect the moving direction, in particular, by forming the same detection width of the movement direction detection in the detection region of the near and far distance of the detection device to the same movement time difference value The present invention relates to a moving direction detecting device using infrared rays that ensures accuracy and reliability of detection information.

In general, 7-14 micrometers (um) of infrared radiation (INFRARED) occurs naturally in the human body, and detects the infrared rays of these wavelengths can determine whether the human approach. For example, a method of detecting an infrared ray generated by a human body when detecting an unauthorized intruder at home, an office, a laboratory, or the like and generating an alarm signal is used.

Infrared light is a kind of invisible light, also called a hot wire, and a pyroelectric sensor (PYROELECTRIC SENSOR) is used for detection, and the detection range is generally about 10 meters (m), and the detected signal is amplified and analyzed. And output in the form required. In addition, a condenser lens is used in front of the pyroelectric sensor in order to increase detection sensitivity of infrared rays emitted from the human body. The condensing lens includes a Fresnel lens and a Fresnel lens array. , Spherical shape and the like. Fresnel lenses have a problem that the detectable angle in the vertical direction is limited to about 5 degrees or more due to structural features. Part of the problem with Fresnel lenses is the use of MIRROR lenses.

A technology for detecting a moving direction of the detected human body has been developed in the manner of detecting the human body using the pyroelectric sensor and the lens. Two pyroelectric sensors are used to detect the movement direction of the human body, and the movement direction is confirmed by analyzing a sequence in which the pyroelectric sensor detects infrared rays emitted from the human body.

1 is a diagram illustrating a method of detecting a moving direction of a moving object using infrared rays according to the related art.

Hereinafter, with reference to the accompanying drawings, the first sensor 10 detects the infrared emitting object in the first region 30, the second sensor 20 emits infrared rays in the second region (40) Detect objects On the other hand, the blind spot (L1) that does not detect the object occurs by the first sensor 10 and the second sensor 20. In order to reduce the blind spot (l1), since the adjacent distance (l2) of the first sensor 10 and the second sensor 20 is reduced to a minimum, a method of eliminating the blind spot is used.

A method of detecting a moving object is, for example, when the object moves from the first area to the second area, the second sensor 20 after the predetermined time elapses after the first sensor 10 detects the object. The object is not detected by the first sensor 10 after a predetermined time elapses after the object is detected, and the second sensor 20 continues to detect the object. In this case, the object is analyzed as moving in the direction of the second sensor 20 from the position of the first sensor 10. That is, after the first sensor 10 detects an object, a time corresponding to approximately an intermediate value of the time required until the second sensor 20 is not detected from the first sensor 10 while maintaining the detection. It is a way to analyze that it moved the boundary line.

At this time, since there is a very large difference in the width of the movement detecting the near distance 50 in the region close to the first sensor 10 and the second sensor 20 located on the same line and the far distance 60 in the far region. There is a problem that a difference occurs in the time of detecting, analyzing and confirming a moving object.

That is, when the near distance 50 is used as a reference, the detection width or the detection time value of the long distance 60 becomes long, and an error occurs in setting the virtual boundary line. ), The detection width or detection time value is too short, causing an error in the virtual boundary setting. Therefore, there is a problem that the accuracy and reliability of the detection of the moving direction of the object and the boundary line setting are inferior.

Therefore, there is a need to develop a technique for accurately detecting boundary lines while accurately detecting a moving direction of a moving object using infrared rays.

The present invention uses a concave mirror lens structure to form a boundary line region having the same width regardless of near and far distances from a sensor that collects infrared rays emitted from an object, and moves using infrared rays to increase the reliability of detecting a direction of movement based on the boundary line. It is an object to provide a direction detecting device.

In addition, an object of the present invention is to provide a moving direction detecting apparatus using infrared rays to detect the moment of movement at the near and far distance with the same detection time value based on the boundary line set to the same width using a simple concave mirror lens and a partition structure. to be.

The present invention devised to achieve the above object comprises a case (100) consisting of a lid (100) and a base (110);
Sensor means (120) fixed to the base (110) and composed of first and second detection sensors (122, 124) for detecting infrared rays emitted from the human body;
Receiving an infrared detection signal from the sensor means 120 to visually display the operation state, and analyzes the detection signal to move to the selected direction within a specified time on the basis of the set boundary line to output an alarm signal and visually display means ( 130);
Mirror lens means 140 arranged in parallel with the sensor means 120 at a predetermined distance and amplifying, reflecting, and guiding infrared rays collected from each zone divided into four vertical directions in two directions, left and right, respectively. ); And
The moving object including the partition wall means 150 is provided at an intermediate position so that infrared rays reflected from the left and right directions of the mirror lens means 140 do not overlap each other due to at least one of diffuse reflection, scattering, diffraction, and interference. In the movement direction detection device,
The sensor means 120 includes a first detection sensor 122 for detecting infrared rays from any one zone designated among zones on the left and right sides;
A second detection sensor 124 for detecting infrared rays from an unspecified zone among the zones on the left and right sides,
The first and second detection sensors 122 and 124 are provided on the same line adjacent to left and right, and are configured to detect infrared rays having a wavelength of 7 to 14 micrometers reflected from the mirror lens means 140. It is characterized by.

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On the other hand, the mirror lens means 140 collects, amplifies and reflects the infrared rays present in any one zone among the zones on the left and the right, so that the first concave mirror 142 leading to the first detection sensor 122. and;
A second concave mirror 144 that collects, amplifies, and reflects infrared rays present in an unspecified zone among the zones on the left and right sides to guide the second detection sensor 124;
The first and second concave mirrors 142 and 144 each have an inclination angle formed to the left and right so that the zones to be detected are adjacent to each other and do not overlap each other, and the concave mirrors having four different concave mirrors having different reflection angles from the top and the bottom.

The PCB means 130 inputs infrared detection signals from the first and second detection sensors 122 and 124 of the sensor means 120, and the first and second detection sensors 122 and 124. Inputs a detection signal to visually drive an LED located in the direction of the corresponding zone, and visually displays a state during operation of an internal circuit by driving the selected LED, and analyzes the detection signal to select the boundary line. If it is confirmed that the movement in the direction to output the alarm signal and at the same time driving the LED to display the visual, each state of the visual display is composed of the configuration to output the corresponding signal.

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The present invention having the above configuration has an industrial use effect of accurately detecting a direction in which an object emitting infrared rays moves over a boundary line regardless of whether it is at a short distance or a long distance within the detection region of the sensor.

In addition, the present invention of the configuration as described above by using a simple structure of the concave mirror lens and the partition wall to form a boundary line in the same width at a short distance and long distance to enhance the reliability of the boundary detection and to accurately analyze the time of moving the boundary line of the moving object. It works.

The terms or words used in this specification and claims are not to be construed as limiting in their usual or dictionary meanings, and the inventors may properly define the concept of terms in order to best explain their invention in the best way possible. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

X-rays belonging to electromagnetic waves have a short frequency band (BANDWIDTH) of less than 0.2 micrometer wavelength (WAVELENGTH), ultraviolet (ULTRAVIOLET) is a band of 0.4 to 0.2 micrometer (um) wavelength, and visible light is 0.4 to 0.75 micro It is a band of um wavelength, near infrared is a band of 0.75 to 3 micrometer (um) wavelength, and far infrared is a band of 3 micrometer (um) to 1000 micrometer (1 millimeter, mm) wavelength. All of these are called electromagnetic waves. Among them, visible light can be felt by the human eye and generally called light, and thus electromagnetic waves can be referred to as light. In particular, infrared (INFRARED) is a wavelength that is longer than the visible light band of the electromagnetic wave and shorter than the microwave band used in the microwave, and the temperature can be felt by the skin.

Electromagnetic waves caused by light are spread as the distance increases from the point where they are generated and thus decreases density per unit area, and is generally known to be inversely proportional to the square of the distance. In other words, if the distance is doubled, it spreads to 4 times the area, and if the distance is increased to 3 times, it spreads to 9 times the area.

Infrared radiation radiates from the human body, and its wavelength is included in the range of 7 to 14 micrometers, so it is included in far infrared rays. When detecting such far infrared rays, the presence or absence of a human body is detected. do.

The present invention detects far-infrared rays emitted from the human body and detects in which direction the virtual boundary line is moved beyond. In particular, the boundary line is irrelevant regardless of whether the boundary line is far from the pyroelectric sensor or is near. According to the present invention, it is related to a technique of accurately and clearly confirming which direction is approached and crossed by setting a certain range of regions evenly.

2 is a diagram illustrating a configuration of a moving direction detecting apparatus using infrared rays, according to an example of the present invention.

Hereinafter, with reference to the accompanying drawings, comprising a case 90 composed of a lid 100 and the base 110, the sensor means 120, the PCB means 130, the mirror lens means fixed to the base 140, the partition wall means 150 is configured.

The sensor means 120 is fixed to one side of the base 110, and consists of a pyroelectric sensor that detects infrared rays of 7 to 14 micrometers (um) naturally emitted from the human body at a distance of about 10 meters (m), And a first detection sensor 122 for detecting infrared rays from one zone designated among the zones on the left and right sides, and a second detection sensor 124 for detecting infrared rays from the other zone ZONE. . In this case, the first detection sensor 122 and the second detection sensor 124 are provided on the same line and input and detect infrared rays reflected from the mirror lens means 140, respectively. On the other hand, the zones detected by the first detection sensor 122 and the second detection sensor 124, respectively, is a horizontal range of about 4 degrees, the distance between the first detection sensor 122 and the second detection sensor 124 is Preferably, it is spaced about 11 millimeters (mm).

The PCB unit 130 is a predetermined function set by connecting various electronic components to a printed circuit board (PCB) and fixing them by soldering or the like and electrically connecting them, and visually displaying an operation state. When the infrared detection signal applied from the means 120 is analyzed and it is confirmed that the human body is detected or moved within a predetermined time in the selected direction based on the set boundary line, the alarm signal is output and displayed visually.

That is, the PCB means 130 is fixed to the base, and inputs infrared detection signals from the first detection sensor 122 and the second detection sensor 124 of the sensor means 120, respectively, and the first and second When the detection sensors 122 and 124 input the detection signal, the LEDs (LED: LIGHT EMITTING DIODE) located in the direction of the zone are driven and displayed visually, and the state of the internal circuit is driven by driving the selected LEDs. If it is confirmed that the boundary line is moved in the selected direction by analyzing the detected detection signal, it outputs an alarm signal and drives the corresponding LED visually, and each state displayed visually is output as the corresponding signal. .

The mirror lens means 140 is fixed to the base 110 and arranged in parallel with the sensor means at a predetermined distance in parallel, and the infrared rays collected from each zone divided in up and down four directions in two directions on the left and right sides, respectively. The first concave mirror 142 which amplifies, reflects, and guides the infrared rays present in one of the zones formed on the left and right sides, collects, amplifies, and reflects the first infrared rays. And a second concave mirror 144 that collects, amplifies, and reflects the infrared rays present in the remaining zones, thereby guiding the second detection sensor 124.

On the other hand, the first and second concave mirrors 142 and 144 respectively form inclination angles to the left and right so that the zones to be detected are adjacent to each other and do not overlap each other, and four concave mirrors having different reflection angles are connected in the vertical direction. Here, four concave mirrors with different reflection angles collect, amplify, reflect, and reflect infrared rays from regions divided into four vertical directions. That is, since the left zone is divided into four upper and lower regions, and the right zone is divided into four upper and lower regions, the eight regions are divided into a total of eight regions to detect infrared rays, thereby improving detection reliability. In addition, the concave mirror has an effect of amplifying the infrared rays collected by using the magnification function, which is characterized by the fact that the opposite real image larger than the real object occurs when the object is between the centripet and the focal point.

The first concave mirror 142 and the second concave mirror 144 each have a predetermined inclination angle to the left and right so as to be adjacent to each other without overlapping the detection zones. This inclination angle is determined by repeated experiments, the inclination angle value is different depending on the radius of curvature due to the focus of the concave mirror.

The partition wall means 150 is a blocking film interposed between the first concave mirror 142 and the second concave mirror 144 of the mirror lens means 140, and the zone and the second concave collected by the first concave mirror 142. The zones collected by the mirror 144 are adjacent to each other without overlapping, and the infrared rays collected by diffuse reflection, scattering, diffraction, interference, and the like are blocked so as not to affect adjacent zones.

FIG. 3 is a diagram showing a state of formation of a zone in which each detection sensor of the infrared detection sensor means collects and detects infrared rays according to an example of the present invention.

Hereinafter, with reference to the accompanying drawings, a zone in which the first detection sensor 122 collects infrared rays is designated as a first zone 123, and a zone in which the second detection sensor 124 collects infrared rays is deleted. 2 zones (125). As described in detail in the description of FIG. 2, the first zone 123 and the second zone 125 are configured to be adjacent to each other without overlapping. At this time, as an example, the width A for detecting the infrared light at a short distance by the first detection sensor 122 is relatively narrow, but the width B for detecting at a long distance is relatively wide.

As an example, when the first detection sensor 122 detects a person located in the first zone 123 at a near distance with infrared rays, and the detected person moves to an adjacent second zone 125, detection of the near distance is performed. Since the width A is narrow, the detection and analysis of the moving state is processed relatively accurately and quickly. However, when there is a long distance from the first detection sensor 122 and moves from the first zone 123 to the second zone 125, the detection range (B) of the long distance is wide, so a lot of time for the detection and analysis of the moving state This takes a lot of errors.

That is, since the time value at which the detected human body moves at a long distance with a wide detection width B is not constant, the range of measurement error is large, and thus the accuracy and reliability of the detected information are reduced. In the case of using the distance as a reference, the measurement value is too small at the near distance, and the error occurs largely. In the case of the intermediate distance as a reference, there is a lot of error because the difference between the measured value at the near and the distance is large. Tolerance range is too large for the analysis of the state moving over, so it cannot be analyzed accurately.

For example, in the present invention, since the first detection sensor 122 detects a human body and moves a predetermined boundary, the second detection sensor 124 detects the human body, and thus, the time required to analyze the moving state is 5 seconds, 1 Choose any of minutes, 2 minutes, and 4 minutes. That is, when it is analyzed that the boundary line moves within the selected time, the corresponding alarm signal is generated by the movement. At this time, the error range is wide or small in the near and far can cause fish.

4 is a diagram illustrating a conceptual configuration of a boundary line width of a moving direction detecting apparatus using infrared rays, according to an example of the present invention.

Hereinafter, the first zone 123 and the second zone 125 in the state where the first zone 123 and the second zone 125 in FIG. 3 are adjacent to each other and do not overlap each other will be described in detail with reference to the accompanying drawings. Excluding the region of, the same boundary line is formed with a constant width (A ', B') at near and far distances.

In order to make the boundary line have a constant width, the right and left angles of the first concave mirror 142 and the second concave mirror 144 constituting the mirror lens unit 140 of FIG. Do not overlap 123 and the second zone 125 in the adjacent state. In addition, the partition wall 150 is interposed between the first concave mirror 142 and the second concave mirror 144 so as not to be affected by diffuse reflection, scattering, diffraction, interference, or the like.

As described above, when the boundary line width is constant, the detection value of the state in which the boundary line is moved is constant, so that the range of the tolerance is small and no error occurs. Therefore, the analyzed value is accurate.

Although the present invention has been described in detail with respect to the specific examples described, it will be apparent to those skilled in the art that various modifications and variations are possible within the technical scope of the present invention, and such modifications and modifications belong to the appended claims.

1 is a diagram illustrating a method of detecting a moving direction of a moving object using infrared rays, according to the prior art;

2 is a diagram showing the configuration of a moving direction detecting apparatus using infrared rays according to an example of the present invention.

Fig. 3 is a diagram showing a state of formation of a zone in which each detection sensor of the infrared detection sensor means collects and detects infrared rays according to an example of the present invention.

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4 is an explanatory diagram illustrating a set boundary line width configuration of an apparatus for detecting a moving direction using infrared rays according to an example of the present invention;

          ** Explanation of symbols on the main parts of the drawing **

90: case 100: lid

110: base 120: sensor means

122: first detection sensor 123: first zone

124: second detection sensor 125: second zone

130: PCB means 140: mirror lens means

142: first concave mirror 144: second concave mirror

150: partition wall means

Claims (5)

A case 90 composed of a lid 100 and a base 110; Sensor means (120) fixed to the base (110) and composed of first and second detection sensors (122, 124) for detecting infrared rays emitted from the human body; Receiving an infrared detection signal from the sensor means 120 to visually display the operation state, and analyzes the detection signal to move to the selected direction within a specified time on the basis of the set boundary line to output an alarm signal and visually display means ( 130); Mirror lens means 140 arranged in parallel with the sensor means 120 at a predetermined distance and amplifying, reflecting, and guiding infrared rays collected from each zone divided into four vertical directions in two directions, left and right, respectively. ); And The moving object including the partition wall means 150 is provided at an intermediate position so that infrared rays reflected from the left and right directions of the mirror lens means 140 do not overlap each other due to at least one of diffuse reflection, scattering, diffraction, and interference. In the movement direction detection device, The sensor means 120 includes a first detection sensor 122 for detecting infrared rays from any one zone designated among the zones on the left and the right; A second detection sensor 124 for detecting infrared rays from an unspecified zone among the zones on the left and right sides, The first and second detection sensors 122 and 124 are provided on the same line adjacent to left and right, and are configured to detect infrared rays having a wavelength of 7 to 14 micrometers reflected from the mirror lens means 140. Moving direction detection apparatus using infrared rays, characterized in that. delete The first concave of claim 1, wherein the mirror lens means 140 collects, amplifies, and reflects infrared rays present in one of the designated zones among the left and right zones. A mirror 142; A second concave mirror 144 that collects, amplifies, and reflects infrared rays present in an unspecified zone among the zones on the left and right sides to guide the second detection sensor 124; The first and second concave mirrors 142 and 144 are each formed to have an inclination angle to the left and right so that the zones to be detected are adjacent to each other and do not overlap each other. Moving direction detection device using the infrared. The method of claim 1, wherein the PCB means 130 inputs infrared detection signals from the first and second detection sensors 122, 124 of the sensor means 120, respectively, the first and second detection sensors When the 122 and 124 input the detection signal, the LED located in the direction of the zone is driven and displayed visually, and the operating state of the internal circuit is displayed visually by driving the selected LED, and the detection signal is analyzed. When it is determined that the boundary line has moved in the selected direction, the alarm signal is output and at the same time, the corresponding LED is driven to display visually, and each state of the visual display is configured to output as a corresponding signal. Moving direction sensing device using infrared rays. delete

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