KR20160076704A - Long distance laser focus matching system using camera image process and focus matching method using of the same - Google Patents

Long distance laser focus matching system using camera image process and focus matching method using of the same Download PDF

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Publication number
KR20160076704A
KR20160076704A KR1020140187087A KR20140187087A KR20160076704A KR 20160076704 A KR20160076704 A KR 20160076704A KR 1020140187087 A KR1020140187087 A KR 1020140187087A KR 20140187087 A KR20140187087 A KR 20140187087A KR 20160076704 A KR20160076704 A KR 20160076704A
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South Korea
Prior art keywords
laser
angle
visible light
error
focus
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KR1020140187087A
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Korean (ko)
Inventor
오암석
김명호
전재환
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동명대학교산학협력단
(주)비트밸리
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Priority to KR1020140187087A priority Critical patent/KR20160076704A/en
Publication of KR20160076704A publication Critical patent/KR20160076704A/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/101—Lasers provided with means to change the location from which, or the direction in which, laser radiation is emitted

Abstract

The present invention relates to a laser monitoring technique which recognizes various situation changes by sensing disconnection of a laser beam or reduction of a radiation intensity and, specifically, to a long-distance focus matching system using a camera image process. The long-distance focus matching system includes: a laser transmitting device including a wire/wireless communications module, a visible ray laser transmitting unit, an infrared ray laser transmitting unit, and an angle control unit for controlling a transmitting angle of visible rays transmitting through the visible ray laser transmitting unit; the wire/wireless communications module corresponding to the laser transmitting device; a camera module for photographing a visible ray laser transmitted from the visible ray laser transmitting unit; and an infrared ray laser receiving unit for receiving the infrared ray laser transmitted from the infrared ray laser transmitting unit. The laser transmitting device extracts an error angle of the visible ray laser confirmed by the camera module and controls a transmitting angle of the visible ray laser transmitting unit by calculating a control angle to compensate the extracted error angle. Therefore, a focus of the infrared ray laser is matched. According to the present invention, the long-distance focus matching system can clearly check the focus error by using the visible ray laser and the camera module in a long distance and can automatically match the focus.

Description

[0001] The present invention relates to a long distance laser focusing system using camera image processing and a focusing method using the same,

The present invention relates to a laser detection technology for recognizing various state changes by detecting laser beam disconnection or attenuation of light quantity, and more particularly, to a long distance laser focusing system using camera image processing and a focus alignment method using the same.

In general, the laser beam has a small degree of diffusion and high energy concentration, and thus has a directivity in which the intensity of light is not reduced even at a long distance. Therefore, it is widely used for optical communication technology, distance measurement technique, or sensing technology for recognizing a situation change by utilizing the above characteristics.

On the other hand, the detection technology for recognizing the situation change using the laser beam has been utilized in various fields such as crime prevention, disaster prevention, military, and medical care, and focus alignment technology for receiving the laser beam and measuring the amount of light is an important part have.

In other words, in order to detect various situations by utilizing the laser beam, the focus error of the laser beam must be precisely aligned in the receiving area.

However, when the distance between the laser transmitter and the laser receiver is increased, the focus shift distance is sensitively changed. As a result, the focus error is difficult to be manually adjusted .

Accordingly, there is a method of increasing the size of the laser beam to reduce the focus error. However, when the size of the laser beam is increased, the density of the light amount decreases and the transmission distance is shortened.

In order to solve such a problem, a method of increasing the size of the laser beam and reducing the size of the laser beam has been proposed. However, since it is difficult to vary the size of the laser in reality, it is difficult to put it into practical use.

In order to solve the above problems, Korean Patent Laid-Open No. 10-2001-0039162, entitled " Laser Communication System for Auto-Aligning Optical Axis ", discloses a laser communication system in which a laser diode Technology is disclosed.

In the prior art, a first laser system for transmitting / receiving a first laser beam and a second laser system for transmitting / receiving a second laser beam are provided. When a communication failure occurs between the first laser system and the second laser system, The system is configured to automatically adjust the shift of the optical axis of the first laser transmitting unit relative to the optical axis of the second laser receiving unit of the second laser system fixed by emitting the second laser beam while positioning the first laser receiving unit along the predetermined direction.

That is, in the above-mentioned prior art, when an error of an optical axis occurs, the first laser system and the second laser system continuously irradiate the laser beam to each other while fixing one side and moving the other side in an arbitrary direction.

Therefore, there is a problem that the time and energy consumption required for the auto-alignment may increase depending on the result of the arbitrary direction selection.

KR20010039162A (May 15, 2001) KR20010088109A (December 29, 2001)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a camera module that includes a visible light laser emitting unit in a laser emitting unit and is capable of photographing a laser emitting unit along with a visible ray to a laser receiver, And to provide a long-distance laser focus matching system using the processing.

It is another object of the present invention to provide a remote laser focus matching method using a camera image processing capable of clearly extracting a focus error through camera image processing based on the above system and easily correcting the extracted error .

The present invention relates to a wireless communication device, and a method for controlling the same. The present invention relates to a wireless communication module, a visible light laser emitting part, an infrared laser emitting part, a laser emitting part provided with an angle adjusting part for adjusting the emitting angle of a visible ray emitted from the visible ray laser emitting part, A camera module for photographing a visible light laser emitted from the visible light laser emitting unit, and an infrared laser receiving unit for receiving an infrared laser transmitted from the infrared laser emitting unit Wherein the laser oscillator extracts an error angle of the visible light laser identified through the camera module and calculates a control angle for correcting the extracted error angle to adjust the angle of emission of the visible light laser oscillator, And the focal point of the light beam is matched.

The visible ray laser emitting unit and the infrared ray emitting unit are fabricated as an integrated board so that the emission angles of the respective lasers are emitted in parallel with each other.

And the distance between the visible light laser emitting unit and the infrared laser emitting unit is formed to be equal to the distance between the camera module and the infrared laser receiving unit.

The laser transmitter may further include a plurality of LED modules for recognizing the position of the laser transmitter.

The focus alignment method according to the present invention may include a step of extracting an enlarged area for recognizing the position of the laser transmitter by photographing the laser transmitter having a visible light laser emitting part and an infrared laser emitting part with a laser receiver equipped with a camera module A step S200 of extracting a first direction error angle of the visible light laser emitted from the visible light laser emitting unit through the enlarged region extracted in the step S100, Calculating a visible ray laser emission angle data for error correction by receiving the first direction error angle data, and adjusting the emission angle of the laser oscillator according to the set angle control standard, (S300), and a second direction error that intersects the first direction in a state where the first direction focus error is matched by the step (S300) (S400) and the second directional error data extracted in the step S400 to determine a visible light laser emitting angle for error correction, and, in accordance with the determined angle control reference, (S500) in which the focus error of the second direction is matched by repeating the process of adjusting the angle.

In the step S100, the LED module included in the laser transmitter is recognized, and the extraction region is extended by a distance set outside the recognized LED module.

And the first direction and the second direction are the X-axis direction and the Y-axis direction of the plane coordinate system.

In the step S400, when the direction of the visible light laser shown in the enlarged area extracted by the camera module is reversed, the error correction direction is switched and the reference control angle is reduced.

In step S500, when the focus alignment in the first direction and the second direction is completed, the visible light laser disappears on the extracted enlarged area.

According to the present invention, the focus error can be clearly confirmed using a visible light laser and a camera module even at a long distance, and auto focus matching can be performed based on the confirmed data. In addition, since the visible light laser is not continuously irradiated during the focus alignment process, energy consumption can be reduced.

Therefore, as the focus alignment is facilitated, the system can be efficiently configured by utilizing the present invention in various fields.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 and FIG. 2 show an embodiment of a system configuration of a long distance laser focusing system using camera image processing according to the present invention.
FIG. 3 illustrates a focus adjustment control process using the system shown in FIGS. 1 and 2. FIG.
4 to 7 are views showing camera images according to a control procedure according to the present invention.
8 is a view showing a camera image in a state where a control process according to the present invention is completed.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. It is to be understood, however, that the spirit of the invention is not limited to the embodiments shown and that those skilled in the art, upon reading and understanding the spirit of the invention, may easily suggest other embodiments within the scope of the same concept.

FIG. 1 and FIG. 2 are views showing an embodiment of a configuration of a long-distance laser focusing system using camera image processing according to the present invention.

Referring to these drawings, a remote laser focusing system (hereinafter referred to as a 'focus matching system') using a camera image processing according to the present invention includes a laser transmitter 100 and a laser receiver 200 configured as follows .

The laser transmitter 100 includes a rectangular transmitter main body 110, an LED module 120 provided on one side of the transmitter main body 110, And a visible light laser emitting unit 140 and an infrared laser emitting unit 160 positioned at a predetermined distance from the visible light emitting laser unit 140. The laser receiver 200 includes a rectangular receiver body 210 and a camera module 220 and an infrared laser receiver 240 disposed at a central portion of the receiver body 210.

In detail, the LED module 120 is provided at each corner of the transmitter body 110 to recognize the position of the laser transmitter 100 in an image frame captured by the camera module 220 .

The visible light laser emitting unit 140 is configured to display an optical axis that can be identified in an image frame photographed by the camera module 220, and may be implemented in various colors.

The infrared laser transmitting unit 160 is configured to transmit and receive infrared rays together with the infrared laser receiving unit 240 and to detect a situation through disconnection of an obstacle or attenuation of a light amount.

The camera module 220 is configured to photograph an image of the laser oscillator 100 to form an image frame. The camera module 220 generates a plurality of photographed images by exposing the visible light laser 300 so that focus alignment can be performed.

The visible ray laser emitting unit 140 and the infrared ray emitting unit 160 are integrally formed so as to maintain a parallel emission angle and the camera module 220 and the infrared laser receiving unit 240 corresponds to the distance between the visible light laser emitting portion 140 and the infrared laser emitting portion 160.

Accordingly, when the visible light laser emitting portion 140 is focused, the focus alignment of the infrared laser emitting portion 160 can be performed at the same time.

Although not shown, the laser transmitter 100 is provided with an angle adjuster for focus alignment of the visible light laser transmitter 140 and the infrared laser transmitter 160, and the angle adjuster is configured to be rotatable up and down and right and left do.

For example, the angle adjusting unit may include a driving motor having a speed reducer.

The laser transmitter 100 and the laser receiver 200 are further provided with serial / wired / wireless network modules such as WIFI and Zigbee to transmit / receive control data.

Hereinafter, the focus adjustment control process using the focus adjustment system configured as above will be described.

FIG. 3 is a view showing a focus adjustment control process using the system shown in FIGS. 1 and 2. FIG. 4 to FIG. 7 are views showing camera images according to the control process according to the present invention.

Referring to these drawings, the focus matching method according to the present invention includes the following steps.

First, in the focus matching method according to the present invention, an enlarged area for confirming the position of the laser transmitter 100 is extracted through the camera module 220 as shown in FIG.

Hereinafter, for convenience of explanation, the enlarged area is referred to as a laser-emitting-device extracting area 224, and in the case of a configuration on the screen shown in FIG.

In the step S100, the four laser modules 120 installed at the corners of the transmitter body 110 are extracted from the camera image frame 222 taken by the camera module 220, As shown in FIG.

That is, the LED module 120 is configured to determine the laser emitting device extracting area 224 so that the extended area can be extracted from the position of the LED module 120 of the entire camera image frame 222 by a predetermined range do.

Upon completion of the extraction of the laser transmitter extraction region 224 through the step S100, the laser transmitter 100 transmits the visible light laser 300 through transmission / reception of a wire / wireless network based control command. The visible light laser 300 emitted as described above is photographed by the camera module 220 and is shown in the laser emitting device extracting area 224 and the visible light laser 300 The first direction error is extracted (S200)

5, the visible light laser 300 emitted from the laser oscillator 100 toward the laser receiver 200 has an error angle of 'A' in the left direction as shown in FIG. 5 (a) have.

The above state is photographed by the camera module 220 and is shown in the laser emitting device extracting area 224 as shown in FIG. 5 (b).

Accordingly, in the step S200, an error angle and direction of " A " can be extracted from the visible light laser 300 'and the laser transmitter 100' shown in the laser emitting region 224.

Also, in step S200, the minimum control angle of the visible light laser 300 is set, and a first direction control angle for focus alignment is calculated based on the set minimum control angle. Then, the calculated first directional control angle is transmitted to the laser transmitter 100 through the wired / wireless communication network.

In the present embodiment, the X-axis control angle of the plane coordinate system is calculated from the first direction control data in step S200, and the X-axis control data is transmitted to the laser transmitter 100. [

In the laser transmitter 100 receiving the X-axis control data through step S200, as shown in FIG. 6A, the X-axis control data received by the angle adjuster is transmitted from the visible ray laser 300 Adjust the angle (S300).

6 (b), when the error angle of the visible light laser 300 'shown in the laser beam source extracting area 224 does not converge to 0 ° or the tolerance range, Axis control angle is re-extracted by repeating steps S200 and S300 to adjust the angle of the X-axis control angle data by transmitting / receiving the re-extracted X-axis control angle data, .

Meanwhile, when the first direction, that is, the X-axis focus alignment, is completed through step S300, a second directional error intersecting with the first direction is extracted (S400)

In step S400, the minimum control angle of the visible light laser 300 is set as in step S300, and a second direction control angle for focus alignment is calculated based on the set minimum control angle. Then, the calculated second directional control angle is transmitted to the laser oscillator 100 via the wired / wireless communication network.

In this embodiment, the plane coordinate Y-axis control angle is calculated from the second direction control data in step S400, and the Y-axis control data is transmitted to the laser transmitter 100. [

However, it is impossible to directly extract the angle of the Y axis by the photographed image in the laser beam source extracting area 224. Accordingly, the Y-axis control angle is calculated and extracted by checking the angle of view at which the position of the visible light laser 300 'is inverted as shown in FIG. 7 based on the set minimum control angle.

When the second direction error data is extracted as described above, the second direction focus adjustment is performed by controlling the angle adjuster according to the extracted error data to adjust the outgoing angle (S500).

In the step S500, if the visible light laser 300 'is still displayed in the laser emitting region 224 after adjusting the outgoing angle, the steps S400 and S500 are repeatedly performed to reduce the error angle. Axis control angle and re-extracts the Y-axis control angle and corrects the focus adjustment by adjusting the angle adjusting unit by transmitting / receiving the re-extracted Y-axis control angle data.

7 (a), when the visible light laser 300 is positioned above the camera module 220 installed in the laser receiver 200, the laser transmitter 100 'is inserted into the laser transmitter extraction region 224, A visible light laser 300 'is shown.

For example, assuming that the state as shown in FIG. 7A is an upper 15 ° angle of the camera module 220, when the minimum control angle is set to 10 °, in the step S500, And the dial angle is adjusted.

7 (b), the visible light laser 300 'is still incident on the upper side of the laser transmitter 100' in the laser transmitter extraction region 224 through the step S400 after the emission angle is adjusted, The error data is extracted and the outgoing angle is adjusted to 10 degrees downward through the step S500.

If the visible light laser 300 is located below the camera module 220 as shown in FIG. 7C after the additional adjustment of the angle of departure, the laser transmitter 100 ' A visible light laser 300 'is shown.

When the visible light laser 300 'is inverted on the laser beam source extracting area 224 as described above, the direction of the error data extracted through the step S400 is reversed, and the minimum control angle of the received angle adjusting part The dial angle is adjusted by reducing.

At this time, the minimum dial angle can be set to 1/2 of the initial control angle.

The focus alignment is completed by repeating the steps S400 and S500 so that the second direction error is included in the effective range.

8 is a view showing a camera image in a state in which the control process according to the present invention is completed. When the focus alignment is completed, as shown in FIG. 8 (a), the visible light laser between the laser oscillator 100 and the laser receiver 200 The laser oscillator 300 'is emitted horizontally to the ground. At this time, only the laser transmitter 100' and the visible laser 300 'disappear in the laser transmitter extraction region 224 as shown in FIG. 8B.

The distance between the visible ray laser emitting unit 140 and the infrared ray emitting unit 160 and the distance between the camera module 220 and the infrared ray receiving unit 240 are equal to each other The infrared laser focus is aligned as it is formed.

100, 100 '.. Laser transmitter 110 .... Transmitter body
120 ......... LED module 140 ... ... visible light laser emitting section
160 .......... Infrared laser emitting part 200 ......... laser receiver
210 Receiver body 220 Camera module
224 ......... laser emitting machine extraction region 240 .......... infrared laser receiving section
300,300 '.. Visible light laser

Claims (9)

A laser transmitter having an angle adjusting unit for adjusting an angle of a visible light emitted from the visible light laser emitting unit,
A camera module for photographing a visible light laser emitted from the visible light laser emitting unit, an infrared laser receiving unit for receiving an infrared laser transmitted from the infrared laser emitting unit, ; ≪ / RTI >
In the laser transmitter,
The focus of the infrared laser is adjusted by extracting an error angle of the visible light laser identified through the camera module, calculating a control angle for correcting the extracted error angle, and adjusting the angle of emission of the visible light laser emitting unit A remote laser focus matching system using camera image processing.
The method according to claim 1,
Wherein the visible light laser emitting unit and the infrared laser emitting unit are fabricated as a monolithic board so that emission angles of the respective lasers are emitted in parallel with each other. The method according to claim 1,
Wherein the distance between the visible light laser emitting unit and the infrared laser emitting unit is equal to the distance between the camera module and the infrared laser receiving unit.
The laser irradiation apparatus according to claim 1,
And a plurality of LED modules for recognizing the position of the laser oscillator are further provided.
A step S100 of extracting an enlarged region for recognizing the position of the laser transmitter by photographing the laser transmitter having a visible light laser emitting portion and an infrared laser emitting portion with a laser receiver equipped with a camera module;
A step S200 of extracting a first direction error angle of the visible light laser emitted from the visible light laser emitting unit through the enlarged region extracted in the step S100;
The first direction error angle data extracted in the step S200 is received to calculate visible light ray emitting angle data for error correction and the emitting angle of the laser oscillator is adjusted according to the set angle control reference, A one-direction focus error is matched (S300);
A step (S400) of extracting a second directional error intersecting the first direction in a state where the first direction focus error is matched by the step (S300);
The second direction error data extracted in step S400 is received to determine a visible light laser emitting angle for error correction and a second direction emitting angle of the laser emitting device is adjusted according to the determined angle control reference And a second direction focus error is matched (S500).
6. The method of claim 5,
Wherein the step S100 recognizes the LED module included in the laser transmitter and extends the extraction area by a distance set outside the recognized LED module.
6. The method of claim 5,
Wherein the first direction and the second direction are the X-axis direction and the Y-axis direction of the plane coordinate system.
6. The method of claim 5,
In the step S400, when the direction of the visible light laser shown in the enlarged area extracted by the camera module is reversed, the error correction direction is switched and the reference control angle is reduced. Distance laser focusing method.
6. The method of claim 5,
Wherein the visible light laser disappears on the extracted enlarged area when the focus alignment in the first direction and the second direction is completed in step S500.

KR1020140187087A 2014-12-23 2014-12-23 Long distance laser focus matching system using camera image process and focus matching method using of the same KR20160076704A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190053747A (en) * 2017-11-10 2019-05-20 김진형 Measuring Instrument for Sizing Object at Long Distance

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010039162A (en) 1999-10-29 2001-05-15 우병일 Laser communication system to automatically align optical axis
KR20010088109A (en) 2000-03-10 2001-09-26 이종수 Electrical grounding system for building

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010039162A (en) 1999-10-29 2001-05-15 우병일 Laser communication system to automatically align optical axis
KR20010088109A (en) 2000-03-10 2001-09-26 이종수 Electrical grounding system for building

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190053747A (en) * 2017-11-10 2019-05-20 김진형 Measuring Instrument for Sizing Object at Long Distance

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