KR102014235B1 - Device for Focusing Laser Beam and Laser System having the same - Google Patents

Abstract

According to the present invention, disclosed are a beam convergence device of a laser and a laser system including the same. The beam convergence device of a laser comprises: a beam convergence unit converging a dispersed laser beam and generating a fin beam to converge energy to an optic axis based on a cross section orthogonal to a progress direction; and an assembly module assembling the beam convergence unit in one side. The assembly module includes a rotation drive unit including a motor and rotating the beam convergence unit so as to increase tracking accuracy and increase durability of high-accuracy optical equipment.

Description

Device for Focusing Laser Beam and Laser System having the same

The present invention relates to a laser beam focusing apparatus of a laser and a laser system including the same, and more particularly, to a beam focusing apparatus of a laser used in rotating equipment and a laser system including the same.

Equipment such as lasers and astronomical telescopes use low-friction bearings for high-speed rotation and improved tracking accuracy for moving targets.

In the conventional case, the roller bearing is used, but in the face of the problem of resistance generation due to friction, vibration of the bearing and shaking of the aiming point due to ultra-high speed orientation, it is difficult to improve tracking accuracy.

In addition, in the case of a conventional bearing, the surface contacting the internal and external environment based on the external environment is not sealed, and dust, moisture, and water penetrate from the outside, resulting in deterioration of performance as the use time elapses, resulting in high precision. The durability of the optical equipment is a problem, and accordingly, it is necessary to proactively deal with failure and performance deterioration through system check function and drive system condition monitoring.

The present invention focuses on a laser beam focusing apparatus and a laser system including the laser beam focusing unit, and a beam focusing unit for generating a pin beam to concentrate energy on an optical axis based on a cross section orthogonal to a traveling direction, and the beam focusing unit. It includes an assembly module for assembling, the assembly module has a purpose to improve the tracking accuracy and to increase the durability of the high-precision optical equipment by providing a rotary drive unit for rotating the beam focusing unit including a motor.

In addition, there is another object to provide a proactive response system for failures and performance degradation through a system check function and drive system status monitoring, including a fault diagnosis unit for identifying a defect.

Still other objects of the present invention may be further considered without departing from the following detailed description and effects thereof.

In order to solve the above problems, the laser beam focusing apparatus according to an embodiment of the present invention, a beam for generating a pin beam so that the energy is concentrated on the optical axis based on the cross section orthogonal to the traveling direction by focusing the distributed laser beam A focusing unit includes an assembly module for assembling the beam focusing unit on one side, and the assembly module includes a rotation driver including a motor to rotate the beam focusing unit.

Here, the beam focusing unit may include an eyepiece positioned in the advancing direction, a lens housing positioned about the optical axis, and a reflective plane mirror positioned at a predetermined angle with the lens housing and including a hollow in the optical axis. do.

Here, the lens housing includes an objective lens for receiving the laser beam reflected through the reflective plane mirror in the center of the lens housing, the objective lens rotates along the optical axis of the eyepiece.

Here, the rotation drive unit, the yoke assembly driving unit for causing the beam focusing portion to rotate in a direction perpendicular to the eyepiece lens and a pedestal assembly driving unit located on the lower end of the yoke assembly driving unit, the pedestal assembly driving unit rotation The beam focusing section rotates in the azimuth direction.

Here, the yoke assembly driving unit is assembled with a first motor, the lens housing, the first rotating shaft to rotate the lens housing about the optical axis, the first bearing for supporting the first rotating shaft and the first bearing And a yoke positioned between the first rotation shaft.

Here, the first bearing, including the inner space, the bearing housing positioned to be in contact with the first rotation shaft, an air inlet formed to be open on one side of the bearing housing and the contact surface in contact with the other side of the bearing housing And a contraction chamber for compensating the positive pressure of the internal space.

Here, the pedestal assembly driving unit, a second rotating shaft for causing the beam focusing unit to rotate in the azimuth direction and a second bearing for supporting the second rotating shaft, the second bearing, the vibration of the second bearing is detected It includes a sensor unit for.

The apparatus may further include a failure diagnosis unit for identifying a defect of the second bearing, wherein the failure diagnosis unit may include a theoretical value analysis unit analyzing a theoretical value of a defect frequency according to the characteristics of the second bearing, and a theory of the defect frequency. Threshold setting unit for setting a threshold for the warning and replacement time of the defect based on the value, Status information receiver for receiving the vibration data for each position of the second bearing from the sensor unit, Based on the vibration data A feature value extraction unit for extracting a feature value for at least one frequency band for each position of the second bearing, and comparing the feature value with the threshold, if the feature value is large, a defect occurs in the second bearing. It includes a defect determination unit that determines that there is.

Laser system according to an embodiment of the present invention, the laser oscillation unit for generating a laser beam, the beam focusing unit for generating a pin beam so that the energy is concentrated on the optical axis based on the cross section orthogonal to the traveling direction by focusing the distributed laser beam And an assembly module for assembling the beam focusing unit to one side and a failure diagnosis unit for identifying a defect of the assembly module. The assembly module includes a rotation driver including a motor to rotate the beam focusing unit.

Here, the beam focusing unit may include an eyepiece positioned in the advancing direction, a lens housing positioned about the optical axis, and a reflective plane mirror positioned at a predetermined angle with the lens housing and including a hollow in the optical axis. do.

Here, the rotation drive unit, the yoke assembly driving unit for causing the beam focusing portion to rotate in a direction perpendicular to the eyepiece lens and a pedestal assembly driving unit located on the lower end of the yoke assembly driving unit, the pedestal assembly driving unit rotation The beam focusing section rotates in the azimuth direction.

Here, the pedestal assembly driving unit, a second rotating shaft for causing the beam focusing unit to rotate in the azimuth direction and a second bearing for supporting the second rotating shaft, the second bearing, the vibration of the second bearing is detected It includes a sensor unit for.

Here, the failure diagnosis unit, the theoretical value analysis unit for analyzing the theoretical value of the defect frequency according to the characteristics of the second bearing, the threshold for the warning and replacement time of the defect based on the theoretical value of the defect frequency A threshold point setting unit configured to set a state information receiving unit for receiving vibration data for each position of the second bearing from the sensor unit, and at least one frequency band characteristic value for each position of the second bearing based on the vibration data; And a feature determining unit that extracts the feature value extracting unit, and compares the feature value with the threshold and determines that the second bearing is defective when the feature value is large.

As described above, according to the embodiments of the present invention, the beam focusing unit and the beam focusing unit generate a fin beam so that energy is concentrated on the optical axis based on a cross section orthogonal to the traveling direction by focusing the distributed laser beam. It includes an assembly module to be assembled in, the assembly module can include a motor to improve the tracking accuracy by providing a rotating drive for rotating the beam focusing unit, it is possible to increase the durability of the high-precision optical equipment.

In addition, it is possible to prepare a proactive response system for failures and performance deterioration through system check function and drive system status monitoring, including a fault diagnosis unit for identifying a defect.

Even if the effects are not explicitly mentioned herein, the effects described in the following specification and the tentative effects expected by the technical features of the present invention are treated as described in the specification of the present invention.

1 is a view showing a beam focusing apparatus of a laser according to an embodiment of the present invention.
2 is a view showing a first bearing of a beam focusing apparatus of a laser according to an embodiment of the present invention.
3 is a view showing a second bearing of the beam focusing apparatus of the laser according to an embodiment of the present invention.
4 is a diagram illustrating a diagnosis method according to a bearing state of a beam focusing apparatus of a laser according to an embodiment of the present invention.
5 is a view showing a principle of generating a defect vibration of the laser beam focusing apparatus according to an embodiment of the present invention.
6 is a block diagram illustrating a failure diagnosis unit of a laser beam focusing apparatus according to an exemplary embodiment of the present invention.
7 is a flowchart illustrating a failure diagnosis method of a laser beam focusing apparatus according to an exemplary embodiment of the present invention.
8 is a view showing a remote transmission process of the laser beam focusing apparatus according to an embodiment of the present invention.

Hereinafter, a laser beam focusing apparatus and a laser system including the same according to the present invention will be described in detail with reference to the accompanying drawings. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In addition, in order to clearly describe the present invention, parts irrelevant to the description are omitted, and like reference numerals in the drawings indicate the same members.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be.

The suffixes "module" and "unit" for components used in the following description are given or mixed in consideration of ease of specification, and do not have distinct meanings or roles.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

The present invention relates to a laser beam focusing apparatus and a laser system including the same.

1 is a view showing a beam focusing apparatus of a laser according to an embodiment of the present invention.

Referring to FIG. 1, a beam focusing apparatus 1 of a laser according to an exemplary embodiment of the present invention includes a beam focusing unit 10, an assembly module 20, a guide unit 30, and a failure diagnosis unit 40. do.

In addition, the laser system including the laser beam focusing apparatus according to an embodiment of the present invention may further include a laser oscillation unit (50).

The beam focusing device of a laser and a laser system including the same are devices for focusing an electron beam by adjusting an electric field or a magnetic field.

Equipments such as lasers and astronomical telescopes rotate the beam focusing device at high speed by applying a low friction bearing to achieve a tracking accuracy of several μrad or less while moving at high speed, and repeating acceleration and deceleration of the beam focusing device. It should also be able to respond steadily to changes in acceleration. Until now, roller bearings have been used, but in the face of problems such as resistance generation caused by friction, run out of the bearing, and shaking of the aiming point due to ultra-high speed orientation, the limit of improving tracking accuracy has been reached. In addition, the problem with the existing bearing is that the beam focusing device is based on the external environment, and the surface contacting the external environment is not sealed, so dust, moisture, water, etc. penetrate from the outside, and as the use time passes, Due to the deterioration of performance, durability of high precision optical equipment has been a problem. In addition, it is necessary to maintain the best condition to prevent the aiming line error through the system check function and drive system status monitoring of the bearing part, which is the main part of the rotating part, but the bearing does not have a bit function for failure, There was no prior response.

Laser beam focusing apparatus according to an embodiment of the present invention can improve the tracking accuracy by providing a rotation drive unit for rotating the beam focusing unit, it is possible to increase the durability of the high-precision optical equipment.

In addition, it is possible to prepare a proactive response system for failures and performance deterioration through system check function and drive system status monitoring, including a fault diagnosis unit for identifying a defect. Accordingly, it is applicable to equipment that needs to rotate without shaking the aiming point due to the ultra-high speed orientation.

The beam focusing unit 10 focuses the distributed laser beam and generates a pin beam so that energy is concentrated on the optical axis based on a cross section perpendicular to the traveling direction.

The beam focusing unit 10 includes an eyepiece 120, a lens housing 130, and a reflective plane mirror 150.

Specifically, the beam focusing unit 10 is composed of an eyepiece (focusing lens) 120 between the advancing direction (P1) in the optical axis, a lens housing 130 that can rotate around it, and a connection optical system. .

The eyepiece 120 is positioned in the traveling direction P1 of the beam.

The lens housing 130 is positioned about the optical axis L1.

The lens housing 130 includes an objective lens 140 for receiving the laser beam reflected through the reflective plane mirror at the central portion of the lens housing.

The objective lens 140 rotates along the optical axis L1 of the eyepiece.

The beam focusing unit 10 is preferably designed to be hermetically sealed, and the objective lens 140 and the eyepiece (focus adjusting lens) 120 form a window.

The reflective plane mirror 150 is positioned to be offset from the lens housing at a predetermined angle and includes a hollow in the optical axis.

The assembly module 20 assembles the beam focusing unit to one side.

The assembly module 20 includes rotational drives 21 and 25 including a motor to rotate the beam focusing part.

The rotary drive includes a yoke assembly drive 21 and a pedestal assembly drive 25.

In other words, by using the direct drive motor and the air bearing to adjust the elevation direction of the beam, the lens housing is rotated based on the optical axis 230, which is the first rotation axis with the eyepiece (focusing lens) 120, the azimuth angle of the beam The direction adjustment is performed through the rotation of the pedestal shaft 260, which is the second rotation axis.

The yoke assembly driver 21 causes the beam focusing part to rotate in an elevation direction in a direction perpendicular to the eyepiece.

The yoke assembly driver 21 includes a first driver housing 210, a first motor 220, a first rotational shaft 230, and a first bearing 240.

The beam focusing unit is mechanically assembled to the yoke assembly driving unit 21 so that the beam focusing unit can rotate at an angle perpendicular to the eyepiece (focus adjusting lens) 120.

The first driving unit 210 is connected to the second rotation shaft 260 to be assembled to the pedestal assembly driving unit, and rotates in the azimuth direction by the rotation of the pedestal assembly driving unit.

The first motor 220 performs the rotation in the elevation direction.

The first rotation shaft 230 is assembled with the lens housing so that the lens housing rotates about the optical axis.

The first bearing 240 supports the first rotation shaft.

In addition, it includes a yoke (not shown) positioned between the first bearing and the first rotating shaft.

The pedestal assembly driver 25 is located at the bottom of the yoke assembly driver.

The beam focusing unit rotates in the azimuth direction by the rotation of the pedestal assembly drive unit.

The pedestal assembly driver 25 includes a second driver housing 250, a second rotation shaft 260, a second bearing 270, and a second motor 280.

The yoke assembly drive is assembled on the pedestal assembly drive 25 for rotation in the azimuth direction.

The second drive housing 250 assembles and supports the yoke assembly drive to rotate.

The second rotating shaft 260 allows the beam focusing part to rotate in the azimuth direction.

The second bearing 270 supports the second rotation shaft and includes a sensor unit 277 for detecting vibration of the second bearing.

Laser beam focusing apparatus according to an embodiment of the present invention uses the yoke assembly drive unit 21 and the pedestal assembly drive unit 25, by using an air bearing for the rotation of the beam focusing unit to improve the durability of high precision optical equipment Can be.

In addition, by including the sealing portion 275 for sealing the surface in contact with the internal and external environment, it is possible to prevent the penetration of dust, moisture, water and the like.

The second motor 280 rotates in the azimuth direction of the beam focusing unit.

In addition, it is preferable to use a thermometer, and the motor can send a fault signal to the system inspection equipment by using the fault diagnosis unit. The bearing according to an embodiment of the present invention provides a bit function for a fault, and a beam focusing device. Maintenance is possible before the performance drops.

The first bearing 240 and the second bearing 270 according to an embodiment of the present invention preferably use air bearings. Air bearings can be used to supply compressed air to provide adsorption or flotation.

Conventional metal roller bearings have a limited lifespan, but air bearings are frictionless, resulting in no life degradation caused by contact force resistance.

Specifically, the application portion is interlocked with the first motor to adjust the elevation of the beam focusing unit, and to be interlocked with the second motor for azimuth rotation of the yoke assembly drive unit.

The first bearing 240 and the second bearing 270 may prevent friction from occurring, thereby minimizing ultra-high speed and shaking of the aiming point. By utilizing an air membrane (Hydrodynamic Pressure) formed between the shaft and the bearing during rotation, it is possible to maximize energy efficiency by implementing a non-contact method without friction with the shaft during rotation.

The guide unit 30 divides the laser beam into a plurality of laser beams so as to pass through a plurality of paths, and collects the plurality of split beams to guide them in a specific path.

The failure diagnosis unit 40 is for identifying a defect of the second bearing.

If the problem is caused by the eccentric force caused by the failure, the failure diagnosis system using the sensor can be used to recognize the failure signs in advance.

Envelope Analysis is used to separate the frequency generated by the fault of the bearing part from other noise components such as motor, cooling device, power supply, etc. by using the failure diagnosis unit 40. Signal transmission and remote transmission to the fire control system allow for preemptive maintenance planning before equipment degradation occurs.

In addition, it is possible to collect big data of the operating characteristics of the equipment by collecting and analyzing data from the equipment in operation, thereby contributing to the use of the database when developing similar models and the development of ICT-based equipment management technology. have.

The laser oscillator 50 generates a laser beam.

2 is a view showing a first bearing of a beam focusing apparatus of a laser according to an embodiment of the present invention.

Referring to FIG. 2A, the first bearing 240 of the laser beam focusing apparatus according to the exemplary embodiment of the present invention includes a bearing housing 241, an air inlet 242, and a contraction chamber 245. do.

The first bearing 240 supports the first rotation shaft.

The first bearing 240 according to an embodiment of the present invention preferably uses an air bearing. Air bearings can be used to supply compressed air to provide adsorption or flotation.

The first bearing 240 may minimize the shaking of the high-speed direction and aiming point by preventing the occurrence of friction. By utilizing an air membrane (Hydrodynamic Pressure) formed between the shaft and the bearing during rotation, it is possible to maximize energy efficiency by implementing a non-contact method without friction with the shaft during rotation.

The first bearing 240 has a surface in contact with the internal environment and a surface in contact with the external environment in a continuous circular shape, so that the bearing acts as a sealing between the inside and the outside.

Since there is a high pressure therein, the positive pressure is generated on the contact surface 246 with the contraction chamber 245 using this air flow. The seal's function provides a continuous flow of air through small holes to keep dust, moisture and water from penetrating from the outside.

The bearing housing 241 includes an inner space 243 and is positioned to be in contact with the first rotation shaft 230.

The air inlet 242 is formed to be open at one side of the bearing housing.

The contraction chamber 245 includes a contact surface 246 in contact with the other side of the bearing housing, and compensates for the positive pressure of the internal space.

The contraction chamber 245 includes a supply hole 244 located separately from the internal space 243 to compensate for the positive pressure.

As the supported shaft rotates, an air membrane is formed between the shaft and the bearing, and the dynamic pressure generated by the wedge effect caused by the change of the minute gap supports the shaft and acts as a lubricant, so that air acts as a lubricant. Oil Less can be implemented.

The shrinkage chamber 245 is used to maximize the advantages of the low friction air bearing and to secure watertightness during operation or storage. The inside of the contraction chamber 245 becomes positive when the air pressure is applied to the bearing to prevent foreign substances from entering, and when the air pressure is removed from the bearing, the contact surface contracts backward and becomes watertight. That is, even if the beam focusing part rotates at a high angle from the intrusion of water or the like in the sea environment, which is an extreme condition, it serves to block from the external environment.

The beam focusing apparatus according to the exemplary embodiment of the present invention using the contraction chamber 245 may be used even in an extreme environment such as a field or the sea. The contraction chamber 245 together with the air bearing used in the rotating part provides a positive pressure environment so that the beam focusing device can be used in harsh environments, humidity, dust, sand, and long time surface exposure, thereby providing a completely sealed structure.

2B is a view showing the flow of air.

The first bearing 240 uses the viscosity of the air instead of oil, the structure is to blow air into the contact surface with the journal by using the air port in the bearing metal, the air flows out of the bearing spirally with the rotation of the shaft It is.

The watertight performance of the air bearing used in the first bearing 240 eliminates jitter of the laser light source generated while rotating and enables smooth operation through frictional force close to zero.

Air bearings supply compressed air to air permeable porous media made of metals, plastics, carbon, and ceramics to impart adsorption or flotation force. By floating the product by adsorption or non-contact, there is no damage of the product due to friction, and dust generation can be suppressed in the process.

Unlike general ball bearings that use oil as a lubricant, air bearings use air or various gases as lubricants and have low viscosity friction coefficient of the gas, so the power consumption is very small, and high-speed rotation is possible. No pollution, it can be used in clean environment and precision equipment.

3 is a view showing a second bearing of the beam focusing apparatus of the laser according to an embodiment of the present invention.

The second bearing 270 supports the second rotation shaft.

The second bearing 270 includes a sensor unit 277 for detecting the vibration of the second bearing.

The sensor unit 277 is for vibration measurement, and the channel 1 (277a), the 2 (277b) and the 3 (277c) are attached to the bearing inner ring at 120 degree intervals, and the channel 4 is the motor ( 280a or 280b) to confirm the delivery rate.

The second bearing is equipped with an acceleration sensor so that the beam focusing device of the laser maintains a precision error so as to obtain tracking accuracy of several μrad or less, and the aiming line error can be minimized.

In order to separate the frequency generated by the defect of the bearing part from other noise components such as the motor, the cooling device, and the power supply part, FFT and Envelope Analysis are used as shown in Figs. Remotely transmit signal and fire control system.

4 is a diagram illustrating a diagnosis method according to a bearing state of a beam focusing apparatus of a laser according to an embodiment of the present invention.

The state (a) of FIG. 4 is a state in which potential defects can be identified, and then a diagnosis and replacement plan can be made during a change in the state S1 until a failure occurs.

Figure 4 (b) is a vibration measurement (vibration) state, the failure diagnosis unit according to an embodiment of the present invention is sensitive to the fluctuations of the initial minute signs, to analyze the cause of the initial failure in advance to establish a replacement plan It can provide important information.

The state (c) of FIG. 4 is a lubricant analysis state, and the reliability is high, but it is difficult to measure the lubricant in real time.

The state (d) of FIG. 4 is a temperature trend analysis (temperature) state, and it is not appropriate to obtain prior information on the signs of rapid and minute fluctuations.

The state (e) of FIG. 4 is an equipment inspection state, and a method for diagnosing a defect before the driver directly inspects the equipment is needed.

State (f) of Figure 4 is a noise recognition (noise) state, when recognized by the noise analysis, a lot of defects are advanced state is not a suitable way.

Laser beam focusing apparatus according to an embodiment of the present invention, the second bearing 270 is equipped with a sensor unit 277 for detecting the vibration of the second bearing, the failure diagnosis unit 40 is the second Since the defect of the bearing can be identified, the defect can be diagnosed in the state (b) of FIG. 4.

That is, if a problem occurs due to the eccentric force generated as a cause of the failure, a failure diagnosis system using a sensor may be used to recognize the indication of the failure in advance.

5 is a view showing a principle of generating a defect vibration of the laser beam focusing apparatus according to an embodiment of the present invention.

Referring to FIG. 5A, a bearing having a defect consisting of a stationary inner ring subjected to a constant axial load, an outer ring rotating at a constant speed, and a ball has an impulse generated whenever a defect on the race surface meets another surface. Will respond.

Referring to FIG. 5B, since the contact between the defect and the counterpart surface is periodic, the impulse causes the occurrence of a defect characteristic frequency at regular time intervals according to the position of the defect.

6 is a block diagram illustrating a failure diagnosis unit of a laser beam focusing apparatus according to an exemplary embodiment of the present invention.

Referring to FIG. 6, the failure diagnosis unit 40 of the laser beam focusing apparatus according to the exemplary embodiment may include a theoretical value analyzer 410, a threshold setting unit 420, a state information receiver 430, and a feature. And a value extractor 440, a defect determiner 450, and a message transmitter 460.

The failure diagnosis unit 40 is for identifying a defect of the second bearing.

The theoretical value analyzing unit 410 analyzes the theoretical value of the defect frequency according to the characteristics of the second bearing.

The threshold setting unit 420 sets a threshold for the warning and replacement time of the defect based on the theoretical value of the defect frequency.

The state information receiver 430 receives vibration data for each position of the second bearing from the sensor unit.

The feature value extractor 440 extracts feature values for at least one frequency band for each position of the second bearing based on the vibration data.

Extracting feature values for each frequency band may include extracting feature values for one or more frequency bands for each position of each sensor in the frequency domain based on vibration data for each position of the plurality of sensors, and for each position of the plurality of sensors. The feature values of one or more frequency bands are extracted for each sensor position in an envelope frequency domain based on.

The defect determination unit 450 compares the feature value with the threshold and determines that the second bearing is defective when the feature value is large.

When the message transmitter 60 determines that the second bearing is defective, the message transmitter 60 generates an abnormal alarm message and transmits the abnormal alarm message to an external control station.

As soon as the fault situation is determined, a bearing condition alarm or BIT signal is sent to the smartphone and control station.

7 is a flowchart illustrating a failure diagnosis method of a laser beam focusing apparatus according to an exemplary embodiment of the present invention.

Referring to FIG. 7, a failure diagnosis method of a laser beam focusing apparatus according to an exemplary embodiment of the present invention is performed to identify a defect of a bearing in operation S411 of the beam focusing apparatus.

In step S412, the theoretical value analyzer 410 analyzes the theoretical value of the defect frequency according to the characteristics of the second bearing.

In operation S421, the threshold setting unit 420 sets a threshold for warning of a defect and a replacement time based on the theoretical value of the defect frequency.

In step S431, an acceleration sensor is attached to the second bearing, and the state information receiving unit 430 receives vibration data for each position of the second bearing from the sensor unit.

In operation S432, the feature value extractor 440 extracts feature values for at least one frequency band for each position of the second bearing based on the vibration data.

In steps S441 to S445, the defect determination unit 450 compares the feature value with the threshold and determines that the second bearing is defective when the feature value is large.

Specifically, the vibration amount change is determined, the rotational torque change of the bearing is sensed, and the vibration level contribution amount for each frequency band is measured.

In addition, it checks the increase of the transmission rate based on the motor and checks the maximum peak frequency variation of each sensor channel.

If it is determined in step S451 that the message transmission unit 60 determines that the second bearing is defective, the message transmission unit 60 generates an abnormal alarm message and transmits the abnormal alarm message to an external control station.

As soon as the fault situation is determined, a bearing condition alarm or BIT signal is sent to the smartphone and control station.

In step S470, the defective bearing is replaced.

8 is a view showing a remote transmission process of the laser beam focusing apparatus according to an embodiment of the present invention.

Accelerometers are used in bearings and gears, which are simple mechanical structures, to maintain precision errors to minimize the laser beam director's tracking accuracy to a few μrad and to minimize aiming line errors.

After the theoretical analysis of the fault frequency according to the characteristics of each system, the threshold value for warning and replacement time of the fault is calculated based on the enveloping signal value for each frequency band according to the fault identification procedure.

Using remote transmission technology, the system is configured to be always monitored by the control device of the remote diagnosis center.

The above description is only an embodiment of the present invention, and those skilled in the art may implement the present invention in a modified form without departing from the essential characteristics of the present invention. Therefore, the scope of the present invention should not be limited to the above-described examples, but should be construed to include various embodiments within the scope equivalent to those described in the claims.

1: beam focusing device of laser
10: beam focusing unit
20: assembly module
30: guide part
40: fault diagnosis unit
240: first bearing
270: second bearing
277: sensor unit

Claims (13)

A beam focusing unit configured to focus the distributed laser beam and generate a pin beam such that energy is concentrated on an optical axis based on a cross section orthogonal to a traveling direction; And an assembly module for assembling the beam focusing unit to one side.
The beam focusing unit may include an eyepiece positioned in the advancing direction; A lens housing positioned about the optical axis; And a reflective plane mirror positioned at a predetermined angle with respect to the lens housing and including a hollow in the optical axis.
The assembly module includes a rotation drive unit for rotating the beam focusing unit, including a motor.
The rotation drive unit, the yoke assembly drive unit for causing the beam focusing unit to rotate in an elevation direction in a direction perpendicular to the eyepiece; And a pedestal assembly driver positioned at a lower end of the yoke assembly driver.
And the beam focusing unit rotates in the azimuth direction by the rotation of the pedestal assembly driving unit. delete The method of claim 1,
The lens housing,
An objective lens for receiving the laser beam reflected through the reflective plane mirror at a central portion of the lens housing,
The objective lens,
And a beam focusing device for rotating the laser along the optical axis of the eyepiece. delete The method of claim 3,
The yoke assembly driving unit,
A first motor;
A first rotating shaft assembled with the lens housing to rotate the lens housing about the optical axis;
A first bearing supporting the first rotation shaft; And
And a yoke positioned between the first bearing and the first rotational shaft. The method of claim 5,
The first bearing,
A bearing housing including an inner space and positioned to be in contact with the first rotation shaft;
An air inlet formed to be opened at one side of the bearing housing; And
And a contraction chamber including a contact surface in contact with the other side of the bearing housing and compensating the positive pressure of the inner space. The method of claim 5,
The pedestal assembly driving unit,
A second axis of rotation for causing the beam focusing part to rotate in an azimuth direction; And
A second bearing supporting the second rotation shaft;
The second bearing,
Sensor unit for detecting the vibration of the second bearing; the laser beam focusing apparatus comprising a. The method of claim 7, wherein
Further comprising a; fault diagnosis unit for identifying a defect of the second bearing,
The fault diagnosis unit,
A theoretical value analysis unit analyzing a theoretical value of a defect frequency according to the characteristics of the second bearing;
A threshold setting unit for setting a threshold for warning and replacement time of a defect based on the theoretical value of the defect frequency;
A state information receiver receiving vibration data for each position of the second bearing from the sensor unit;
A feature value extraction unit for extracting feature values for at least one frequency band for each position of the second bearing based on the vibration data;
And a defect determination unit that compares the feature value with the threshold and determines that the second bearing is defective when the feature value is large. A laser oscillator for generating a laser beam; And
And a beam focusing unit for focusing the distributed laser beam and generating a pin beam such that energy is concentrated on the optical axis based on a cross section orthogonal to the traveling direction.
The beam focusing apparatus may include an assembly module for assembling the beam focusing unit to one side; And a failure diagnosis unit for identifying a defect of the assembly module.
The beam focusing unit may include an eyepiece positioned in the advancing direction; A lens housing positioned about the optical axis; And a reflective plane mirror positioned at a predetermined angle with respect to the lens housing and including a hollow in the optical axis.
The assembly module includes a rotation drive unit for rotating the beam focusing unit, including a motor.
The rotation drive unit, the yoke assembly drive unit for causing the beam focusing unit to rotate in an elevation direction in a direction perpendicular to the eyepiece; And a pedestal assembly driver positioned at a lower end of the yoke assembly driver.
And the beam focusing unit rotates in the azimuth direction by the rotation of the pedestal assembly drive unit. delete delete The method of claim 9,
The pedestal assembly driving unit,
A second axis of rotation for causing the beam focusing part to rotate in an azimuth direction; And
A second bearing supporting the second rotation shaft;
The second bearing,
And a sensor unit for sensing vibration of the second bearing. The method of claim 12,
The fault diagnosis unit,
A theoretical value analysis unit analyzing a theoretical value of a defect frequency according to the characteristics of the second bearing;
A threshold setting unit for setting a threshold for warning and replacement time of a defect based on the theoretical value of the defect frequency;
A state information receiver receiving vibration data for each position of the second bearing from the sensor unit;
A feature value extraction unit for extracting feature values for at least one frequency band for each position of the second bearing based on the vibration data;
And a defect determination unit that compares the feature value with the threshold and determines that the second bearing has a defect when the feature value is large.

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