CN111525369B - Optical gate with safety monitoring function for time-sharing type optical fiber laser - Google Patents
Optical gate with safety monitoring function for time-sharing type optical fiber laser Download PDFInfo
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- CN111525369B CN111525369B CN202010366801.5A CN202010366801A CN111525369B CN 111525369 B CN111525369 B CN 111525369B CN 202010366801 A CN202010366801 A CN 202010366801A CN 111525369 B CN111525369 B CN 111525369B
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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
- H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
- H01S3/0071—Beam steering, e.g. whereby a mirror outside the cavity is present to change the beam direction
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/0816—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements
Abstract
The invention discloses an optical gate with a safety monitoring function for a time-sharing type optical fiber laser, which comprises a laser transmission optical fiber, an input port, a collimating mirror, a first reflecting mirror, a second reflecting mirror, a light receiver, a first focusing mirror, a second focusing mirror, a first output port, a second output port, a first output optical fiber, a second output optical fiber, an integrated circuit board, a liquid crystal display screen, a first electrode plate, a second electrode plate, a third electrode plate, a first temperature control switch, a second temperature control switch, a third temperature control switch, a fourth temperature control switch, a first proximity switch, a second proximity switch, a third proximity switch, a fourth proximity switch, a first photoelectric detector and a second photoelectric detector, and is arranged on the optical gate. The optical gate internal light path is switched according to requirements, laser is controlled to be coupled into different optical fibers for transmission, light sources are provided for a plurality of workstations in different time, working efficiency is improved, and meanwhile a series of detectors are adopted to monitor the internal state of the optical gate, so that safe use of laser is guaranteed.
Description
Technical Field
The invention belongs to the field of fiber lasers, and particularly relates to an optical gate with a safety monitoring function for a time-sharing fiber laser.
Background
Laser is known as the fastest knife, the most accurate ruler and the brightest light, and is widely applied to the fields of industry, military, medical treatment and the like at present. In the industrial field, with the continuous development of laser technology, the laser processing gradually replaces the traditional industrial manufacturing methods, such as cutting, welding, cladding and the like, and has the characteristics of high production efficiency, more processing materials, high precision, flexible operation and the like. The optical fiber laser adopts the rare earth element doped glass optical fiber as a gain medium, has the advantages of good beam quality, high conversion efficiency, good heat dissipation property, high reliability and the like, and is one of the mainstream light sources for laser processing. The fiber laser has only one output fiber, which can only provide laser light for one working unit, and the size of the output fiber is determined after the fiber laser is shipped from a factory. Therefore, when a user needs multiple laser sources or needs to use different sizes of output fibers, only multiple fiber lasers can be purchased. The optical gate for the fiber laser can effectively save the equipment investment of the laser, and a plurality of working units share one laser, thereby realizing the purpose of one machine with multiple purposes of the fiber laser. At present, no mature optical gate product exists in the home-made laser device, and how to use the optical gate to distribute a beam of laser into a plurality of optical fibers for transmission and ensure the safe use of the laser is a problem to be solved.
The optical gate for the time-sharing fiber laser can rapidly couple laser into the selected output fiber according to the requirements of users, so that one fiber laser can provide laser for a plurality of working units in different time periods, and the users can conveniently replace the optical fiber for operation at any time. Because the optical gate is a closed device, the internal state of the optical gate needs to be monitored in use, and the safe use is ensured. At present, the monitoring means of the whole system of the optical gate for the time-sharing optical fiber laser is deficient, and comprises a switching method of an internal optical path, a control method of laser output and a detection method of an internal state. Therefore, it is important to provide an optical gate for a time-sharing fiber laser having a safety monitoring function.
Disclosure of Invention
The invention aims to provide a time-sharing optical gate for an optical fiber laser with a safety monitoring function, which solves the problem that the optical gate of the optical fiber laser cannot safely and conveniently provide laser for a plurality of working units in different time periods.
The technical solution for realizing the purpose of the invention is as follows: the utility model provides an optical gate for timesharing type fiber laser with safety monitoring function, including laser transmission optical fiber, input port, collimating mirror, first speculum, the second speculum, receive the optical organ, first focusing mirror, the second focusing mirror, first output port, the second output port, first output optical fiber, second output optical fiber, integrated circuit board, the LCD screen, an electrode slice, No. two electrode slices, No. three electrode slices, No. one temperature detect switch, No. two temperature detect switch, No. three temperature detect switch, No. four temperature detect switch, a proximity switch, No. two proximity switch, No. three proximity switch, No. four proximity switch, a photoelectric detector and No. two photoelectric detector.
The laser transmission optical fiber, the input port, the collimating mirror, the first reflecting mirror, the second reflecting mirror and the light receiver are sequentially arranged along the optical axis, the transmission head of the laser transmission optical fiber is arranged in the input port, the working surfaces of the first reflecting mirror and the second reflecting mirror respectively form an included angle of 45 degrees with the optical axis, the folded optical axis is vertical and downward, and the first reflecting mirror and the second reflecting mirror are parallel; a first focusing mirror, a first output port and a first output optical fiber are sequentially arranged below the first reflector along the optical axis direction, and a transmission head of the first output optical fiber is arranged in the first output port; and a second focusing mirror, a second output port and a second output optical fiber are sequentially arranged below the second reflecting mirror along the optical axis direction, and a transmission head of the second output optical fiber is arranged in the second output port.
The first electrode plate is arranged on the upper side of the inner wall of the input port, the first temperature control switch is arranged on the lower side of the inner wall of the input port, and the first electrode plate and the first temperature control switch are connected in series and are connected into a first port of the integrated circuit board; the second electrode plate is arranged on one side of the inner wall of the first output port, the second temperature control switch is arranged on the other side of the inner wall of the first output port, and the second electrode plate and the second temperature control switch are connected in series and are connected into a tenth port of the integrated circuit board; the third electrode plate is arranged on one side of the inner wall of the second output port, the third temperature control switch is arranged on the other side of the inner wall of the second output port, and the third electrode plate and the third temperature control switch are connected in series and are connected into the eighth port of the integrated circuit board; the fourth temperature control switch is arranged on the lower side of the inner wall of the light receiver, and the circuit of the fourth temperature control switch is connected into the sixth port of the integrated circuit board.
The first proximity switch and the second proximity switch are respectively arranged on two sides of the first reflector, the third proximity switch and the fourth proximity switch are respectively arranged on two sides of the second reflector, and circuits of the first proximity switch, the second proximity switch, the third proximity switch and the fourth proximity switch are respectively connected into a second port, a third port, a fourth port and a fifth port of the integrated circuit board; the control circuit of the first reflector is connected into the No. eleven port of the integrated circuit board, and the control circuit of the second reflector is connected into the No. twelve port of the integrated circuit board; the first photoelectric detector is arranged at the oblique upper corner of the first output port, the target surface faces the upper end of the first output optical fiber, and the circuit of the first photoelectric detector is connected into a ninth port of the integrated circuit board; the second photoelectric detector is arranged at the oblique upper corner of the second output port, the target surface faces the upper end of the second output optical fiber, and the circuit of the second photoelectric detector is connected into the seventh port of the integrated circuit board; the liquid crystal screen is connected into the thirteen port of the integrated circuit board.
A safety monitoring method of an optical gate for a time-sharing type optical fiber laser with a safety monitoring function comprises the following steps:
step 1, installing and adjusting a safety monitoring system of an optical gate for a time-sharing optical fiber laser, and turning to step 2;
step 2, switching on an optical shutter power supply, detecting the state of the optical shutter by the integrated circuit board, switching to step 3 when the state of the optical shutter is normal, and switching to step 1 when the state of the optical shutter is abnormal;
step 4, controlling the first port signal to be kept as a channel signal, controlling the laser to input laser, outputting the laser from the selected output optical fiber at the moment, and turning to step 5;
and 5, the optical gate works normally, the integrated circuit board continuously detects the state of the optical gate, the step 5 is carried out when the state of the optical gate is normal, the step 1 is carried out when the state of the optical gate is abnormal, and the step 3 is carried out when the output optical fiber needs to be switched.
Compared with the prior art, the invention has the remarkable advantages that: (1) the laser can be used for multiple purposes, and the equipment investment of a user is reduced; (2) the optical path switching is rapid, the precision is high, the repeatability is good, and the working efficiency is improved; (3) the optical fiber for operation can be conveniently replaced by a user at any time, and the output optical fiber of the optical fiber laser is protected; (4) the internal light path switching of the optical gate is controlled, the internal state of the optical gate is monitored in real time, and the use safety is improved.
Drawings
Fig. 1 is a schematic diagram of a time-sharing optical fiber laser shutter with a safety monitoring function according to the present invention.
Detailed Description
The present invention is described in further detail below with reference to the attached drawing figures.
Referring to fig. 1, the optical gate for a time-sharing fiber laser with a safety monitoring function includes a laser transmission fiber 1, an input port 2, a collimating mirror 3, a first reflecting mirror 4, a second reflecting mirror 5, a light receiving device 6, a first focusing mirror 7, a second focusing mirror 8, a first output port 9, a second output port 10, a first output fiber 11, a second output fiber 12, an integrated circuit board 13, a liquid crystal screen 14, a first electrode plate 15, a second electrode plate 16, a third electrode plate 17, a first temperature control switch 18, a second temperature control switch 19, a third temperature control switch 20, a fourth temperature control switch 21, a first proximity switch 22, a second proximity switch 23, a third proximity switch 24, a fourth proximity switch 25, a first photodetector 26, and a second photodetector 27.
The laser transmission optical fiber 1, the input port 2, the collimating mirror 3, the first reflecting mirror 4, the second reflecting mirror 5 and the light receiver 6 are sequentially arranged along an optical axis. The transmission head of the laser transmission fiber 1 is installed in the input port 2 by using a fiber connector, the input port 2 is fixed on the side wall of the optical gate by a screw, and the collimating lens 3 is installed in the lens barrel and screwed with the input port 2 by a screw thread. The first reflecting mirror 4 and the second reflecting mirror 5 are installed on a fixed clamping structure and connected with a rotating shaft of a stepping motor, and the positions of the first reflecting mirror 4 and the second reflecting mirror 5 can be changed through the rotation of the stepping motor. The working surfaces of the first reflector 4 and the second reflector 5 respectively form an included angle of 45 degrees with the optical axis, the folded optical axis is vertical and downward, and the first reflector 4 and the second reflector 5 are parallel.
A first focusing mirror 7, a first output port 9, and a first output optical fiber 11 are sequentially installed along the optical axis direction below the first reflecting mirror 4, and a second focusing mirror 8, a second output port 10, and a second output optical fiber 12 are sequentially installed along the optical axis direction below the second reflecting mirror 5. The first focusing lens 7 and the second focusing lens 8 are respectively installed in lens barrels, the lens barrels are respectively installed in the three-dimensional adjusting mechanism through springs, the three-dimensional adjusting mechanism is fixed on the floor of the optical gate through screws, and the spatial positions of the first focusing lens 7 and the second focusing lens 8 can be adjusted by rotating a screw of the three-dimensional adjusting mechanism to perform accurate coupling of laser. The transmission heads of the first output fiber 11 and the second output fiber 12 are respectively mounted on the first output port 9 and the second output port 10 by using fiber connectors, and the first output port 9 and the second output port 10 are fixed on the side wall of the optical shutter by using screws.
The first electrode plate 15 and the first temperature control switch 18 are fixed on the upper side and the lower side of the inner wall of the input port 2 respectively by using fixing glue, and the circuits of the first electrode plate and the first temperature control switch are connected in series and are connected into the first port 28 of the integrated circuit board 13. A second electrode plate 16 and a second temperature control switch 19 are respectively pasted on one side and the other side of the inner wall of the first output port 9 by using heat-conducting glue, and the circuits of the two are connected in series and are connected into a tenth port 37 of the integrated circuit board 13. The third electrode plate 17 and the third temperature control switch 20 are respectively adhered to one side and the other side of the inner wall of the second output port 10 by using heat conducting glue, and the circuits of the three electrode plate and the third temperature control switch are connected in series and are connected into the eighth port 35 of the integrated circuit board 13. The fourth temperature control switch 21 is adhered to the lower side of the inner wall of the light receiver 6 by using heat-conducting glue, and the circuit thereof is connected into the sixth port 33 of the integrated circuit board 13.
The first proximity switch 22 and the second proximity switch 23 are respectively fixed on two sides of the first reflector 4 by screws, the third proximity switch 23 and the fourth proximity switch 24 are respectively fixed on two sides of the second reflector 5 by screws, and circuits of the first proximity switch 22, the second proximity switch 23, the third proximity switch 24 and the fourth proximity switch 25 are respectively connected into a second port 29, a third port 30, a fourth port 31 and a fifth port 32 of the integrated circuit board 13. Control circuits of stepping motors for controlling the movement of the first mirror 4 and the second mirror 5 are connected to the ports 38 and 39 of the integrated circuit board 13. The first photodetector 26 is fixed near the upper oblique corner of the first output port 9 by a clamping structure, the target surface faces the upper end of the first output optical fiber 11, and the circuit is connected to the ninth port 36 of the integrated circuit board 13. The second photodetector 27 is held by a holding structure near the diagonally upper corner of the second output port 10 with the target surface facing the upper end of the second output optical fiber 12, and its circuit is connected to the seventh port 34 of the integrated circuit board 13. The liquid crystal panel 14 is connected to the thirteen port 40 of the integrated circuit board 13.
When the optical gate works, on one hand, each component is ensured not to be damaged, and on the other hand, laser is ensured to be coupled into a fiber core of the output optical fiber for transmission. The safety of the shutter in operation is ensured by a safety monitoring system using a series of detectors to form the shutter. First, the delivery fiber of the laser needs to be properly inserted into the shutter. When the laser transmission optical fiber 1 is correctly inserted into the input port 2, a circuit attached to the laser transmission optical fiber 1 is communicated with the first electrode plate 15, and in a normal working state, the temperature of the input port 2 is lower than a threshold value (the threshold value is usually 70 ℃) of the first temperature control switch 18, an internal circuit of the first temperature control switch 18 is kept closed, and at the moment, a signal of the first port 28 is a path; when the laser transmission optical fiber 1 is not correctly inserted into the input port 2, a circuit attached to the laser transmission optical fiber 1 is not communicated with the first electrode plate 15, and a signal of the first port 28 is an open circuit; when the stray light at the input port 2 is too much, the temperature of the input port 2 is greatly increased due to the absorption of a large amount of stray light, when the temperature of the input port 2 is higher than the threshold value of the first temperature-controlled switch 18, the internal circuit of the first temperature-controlled switch 18 is automatically disconnected, and at the moment, the signal of the first port 28 is disconnected; therefore, the signal of port one 28 is on indicating that the state of the input port 2 is normal, and the signal of port one 28 is off indicating that the state of the input port 2 is abnormal. Similarly, when the first output fiber 11 is correctly inserted into the first output port 9 and the temperature of the first output port 9 is lower than the threshold of the second temperature-controlled switch 19, the signal of the tenth port 37 is on, which indicates that the state of the first output port 9 is normal, otherwise, the signal of the tenth port 37 is off, which indicates that the state of the first output port 9 is abnormal. When the second output fiber 12 is correctly inserted into the second output port 10 and the temperature of the second output port 10 is lower than the threshold value of the third temperature-controlled switch 20, the signal of the eighth port 35 is on, which indicates that the second output port 10 is in a normal state, otherwise, the eighth port 35 is off, which indicates that the second output port 10 is in an abnormal state. The light receiver 6 is used for absorbing and processing residual laser which penetrates through the first reflecting mirror 4 or the second reflecting mirror 5, when the residual laser is too much, the temperature of the light receiver 6 is greatly increased due to the fact that a large amount of residual laser is absorbed, when the temperature of the light receiver 6 is higher than the threshold value of the fourth temperature control switch 21, an internal circuit of the fourth temperature control switch 21 is automatically disconnected, and at the moment, a signal of the sixth port 33 is an open circuit signal, which indicates that the state of the light receiver 6 is abnormal; when the residual laser is proper, the temperature of the light receiver 6 is lower than the threshold value of the fourth temperature control switch 21, the internal circuit of the fourth temperature control switch 21 is kept closed, and the signal of the sixth port 33 is a pass signal, which indicates that the state of the light receiver 6 is normal. When optical elements inside the optical shutter are damaged, a large amount of stray light is generated, meanwhile, when laser cannot be completely coupled into a fiber core of the output optical fiber, leaked laser also generates stray light, for the optical shutter with bearing power of ten thousand watts, the power of the stray light can reach hundreds of watts to kilowatts, and the optical fiber and optical shutter devices are easily burnt, so that the first photoelectric detector 26 and the second photoelectric detector 27 are used for detecting the size of the stray light inside the optical shutter and respectively monitoring the laser coupling states of the first output optical fiber 11 and the second output optical fiber 12. Controlling laser to be output from the first output optical fiber 11, when stray light inside the optical shutter is weak, the size of scattered light detected by the first photoelectric detector 26 is lower than a threshold value set by the optical shutter, and at this time, a signal of the ninth port 36 is a pass signal, which indicates that optical elements inside the optical shutter are not damaged and the laser is coupled into a fiber core of the first output optical fiber 11 for transmission, no laser leaks and the coupling state is good; when stray light inside the optical gate is strong, the size of scattered light detected by the first photoelectric detector 26 is higher than a threshold set by the optical gate, and at this time, the signal of the ninth port 36 is an open-circuit signal, which indicates that optical elements inside the optical gate are damaged, or laser is not completely coupled into the fiber core of the first output optical fiber 11 for transmission, laser leakage occurs, and the coupling state is poor. Similarly, when the size of the scattered light detected by the second photodetector 27 is lower than the threshold set by the optical shutter, the signal of the seventh port 34 is a pass signal, which indicates that the optical elements inside the optical shutter are not damaged and the laser is coupled into the fiber core of the second output optical fiber 12 for transmission, and there is no laser leakage and the coupling state is good; when the scattered light detected by the second photodetector 27 is higher than the threshold set by the optical shutter, the signal of the seventh port 34 is an open-circuit signal, which indicates that the optical elements inside the optical shutter are damaged, or the laser is not completely coupled into the fiber core of the second output optical fiber 12 for transmission, and laser leakage occurs, and the coupling state is poor.
According to the feedback signals of the detectors, when the signals of the port I28, the port six 33, the port seven 34, the port eight 35, the port nine 36 and the port ten 37 are all passage signals, the state of the optical gate is normal; when at least one signal is an open circuit signal, the state of the optical gate is abnormal, and at this time, it is necessary to check whether each device of the optical gate is damaged and whether the optical fiber coupling state is good. The first port 28 signal determines whether the laser can output laser, when the optical gate state is normal, the first port 28 signal is a path, the path signal is transmitted to the control system of the laser through the circuit on the laser transmission optical fiber 1, and at this time, the user can control the laser to output laser; when the state of the optical shutter is abnormal, the signal of the first port 28 is cut off, and the cut-off signal is transmitted to the control system of the laser through the circuit on the laser transmission optical fiber 1, at this time, the user cannot control the laser to output laser, and the state of the optical shutter needs to be checked until the state of the optical shutter returns to normal.
The eleventh port 38 and the twelfth port 39 change the positions of the first mirror 4 and the second mirror 5 by controlling the rotation of the stepping motor. When the first output optical fiber 11 is required to output laser, the eleventh port 38 controls the first reflector 4 to move through the stepping motor; when the proximity switch 23 b detects the position of the first reflecting mirror 4, the stepping motor controlling the movement of the first reflecting mirror 4 stops rotating, and at this time, the first reflecting mirror 4 enters the light path to turn the laser to the channel where the first output optical fiber 11 is located. When the first output optical fiber 11 is not required to output laser, the eleventh port 38 controls the first reflector 4 to move through a stepping motor; when the proximity switch 22 detects the position of the first reflecting mirror 4, the stepping motor controlling the movement of the first reflecting mirror 4 stops rotating, and the first reflecting mirror 4 is withdrawn from the optical path. Similarly, when the second output optical fiber 12 is required to output laser, the twelfth port 39 controls the second reflecting mirror 5 to move through the stepping motor; when the proximity switch 25 No. four detects the position of the second reflecting mirror 5, the stepping motor controlling the movement of the second reflecting mirror 5 stops rotating, and at this time, the second reflecting mirror 5 enters the optical path to deflect the laser light to the channel where the second output optical fiber 12 is located. When the laser output by the second output optical fiber 12 is not needed, the No. twelve port 39 controls the second reflector 5 to move through a stepping motor; when the proximity switch 24 detects the position of the second reflecting mirror 5, the stepping motor controlling the movement of the second reflecting mirror 5 stops rotating, and the second reflecting mirror 5 withdraws from the optical path. Therefore, when the first mirror 4 enters the optical path and the second mirror 5 exits the optical path, the laser light is coupled into the first output optical fiber 11 for transmission. When the first mirror 4 is withdrawn from the optical path and the second mirror 5 is introduced into the optical path, the laser light is coupled into the second output optical fiber 12 for transmission. Therefore, the position of the reflector is detected through the proximity switch, each reflector can be accurately controlled to enter the light path or withdraw from the light path, switching of laser output inside the optical gate is achieved, and the repeated precision of the reflector after multiple times of switching can be guaranteed.
The first reflector 4, the first focusing mirror 7, the first output port 9, the second electrode plate 16, the second temperature control switch 19, the first proximity switch 22, the second proximity switch 23, the first photodetector 26, and the first output optical fiber 11 form a transmission channel of the optical gate, and the transmission channel can be expanded side by side according to the number of the transmission channel. The liquid crystal screen 14 displays the signal status of all the detectors, and can command the stepping motors controlling the first reflecting mirror 4 and the second reflecting mirror 5 to rotate so as to enable the first reflecting mirror 4 and the second reflecting mirror 5 to enter the optical path or withdraw the optical path.
The safety monitoring method of the optical gate for the time-sharing type optical fiber laser with the safety monitoring function comprises the following steps:
step 1, installing and adjusting a safety monitoring system of an optical gate for a time-sharing optical fiber laser, and turning to step 2;
step 2, switching on an optical shutter power supply, detecting the state of the optical shutter by the integrated circuit board 13, switching to step 3 when the state of the optical shutter is normal, and switching to step 1 when the state of the optical shutter is abnormal;
step 4, controlling the first port 28 signal to be kept as a channel signal, controlling the laser to input laser, outputting the laser from the selected output optical fiber at the moment, and turning to step 5;
and step 5, the optical gate works normally, the integrated circuit board 13 continuously detects the state of the optical gate, the step 5 is carried out when the state of the optical gate is normal, the step 1 is carried out when the state of the optical gate is abnormal, and the step 3 is carried out when the output optical fiber needs to be switched.
Claims (9)
1. An optical gate for a time-sharing fiber laser with a safety monitoring function is characterized in that: comprises a laser transmission fiber (1), an input port (2), a collimating mirror (3), a first reflecting mirror (4), a second reflecting mirror (5), a light receiver (6), a first focusing mirror (7), a second focusing mirror (8), a first output port (9), a second output port (10), a first output fiber (11), a second output fiber (12) and an integrated circuit board (13), the liquid crystal display panel comprises a liquid crystal screen (14), a first electrode plate (15), a second electrode plate (16), a third electrode plate (17), a first temperature control switch (18), a second temperature control switch (19), a third temperature control switch (20), a fourth temperature control switch (21), a first proximity switch (22), a second proximity switch (23), a third proximity switch (24), a fourth proximity switch (25), a first photoelectric detector (26) and a second photoelectric detector (27);
the laser transmission optical fiber (1), the input port (2), the collimating mirror (3), the first reflecting mirror (4), the second reflecting mirror (5) and the light collector (6) are sequentially arranged along an optical axis, a transmission head of the laser transmission optical fiber (1) is arranged in the input port (2), working surfaces of the first reflecting mirror (4) and the second reflecting mirror (5) respectively form an included angle of 45 degrees with the optical axis, the folded optical axis is vertically downward, and the first reflecting mirror (4) is parallel to the second reflecting mirror (5); a first focusing mirror (7), a first output port (9) and a first output optical fiber (11) are sequentially arranged along the optical axis direction below the first reflector (4), and a transmission head of the first output optical fiber (11) is arranged in the first output port (9); a second focusing mirror (8), a second output port (10) and a second output optical fiber (12) are sequentially arranged below the second reflecting mirror (5) along the optical axis direction, and a transmission head of the second output optical fiber (12) is arranged in the second output port (10);
the first electrode plate (15) is arranged on the upper side of the inner wall of the input port (2), the first temperature control switch (18) is arranged on the lower side of the inner wall of the input port (2), and the first electrode plate and the first temperature control switch are connected in series in a circuit and connected into a first port (28) of the integrated circuit board (13); the second electrode plate (16) is arranged on one side of the inner wall of the first output port (9), the second temperature control switch (19) is arranged on the other side of the inner wall of the first output port (9), and the circuits of the second electrode plate and the second temperature control switch are connected in series and connected into a tenth port (37) of the integrated circuit board (13); the third electrode plate (17) is arranged on one side of the inner wall of the second output port (10), the third temperature control switch (20) is arranged on the other side of the inner wall of the second output port (10), and the third electrode plate and the third temperature control switch are connected in series in a circuit and connected into the eighth port (35) of the integrated circuit board (13); the fourth temperature control switch (21) is arranged on the lower side of the inner wall of the light receiver (6), and the circuit of the fourth temperature control switch is connected into a sixth port (33) of the integrated circuit board (13);
the first proximity switch (22) and the second proximity switch (23) are respectively arranged on two sides of the first reflector (4), the third proximity switch (24) and the fourth proximity switch (25) are respectively arranged on two sides of the second reflector (5), and circuits of the first proximity switch (22), the second proximity switch (23), the third proximity switch (24) and the fourth proximity switch (25) are respectively connected into a second port (29), a third port (30), a fourth port (31) and a fifth port (32) of the integrated circuit board (13); the control circuit of the first reflector (4) is connected into an eleventh port (38) of the integrated circuit board (13), and the control circuit of the second reflector (5) is connected into a twelfth port (39) of the integrated circuit board (13); the first photoelectric detector (26) is arranged at the oblique upper corner of the first output port (9), the target surface faces the upper end of the first output optical fiber (11), and the circuit of the first photoelectric detector is connected into a ninth port (36) of the integrated circuit board (13); the second photoelectric detector (27) is arranged at the oblique upper corner of the second output port (10), the target surface faces the upper end of the second output optical fiber (12), and the circuit of the second photoelectric detector is connected into a seventh port (34) of the integrated circuit board (13); the liquid crystal screen (14) is connected into a thirteen-number port (40) of the integrated circuit board (13).
2. The optical shutter for a time-sharing fiber laser having a safety monitoring function according to claim 1, characterized in that: when the laser transmission fiber (1) is inserted into the input port (2) and the temperature of the input port (2) is lower than the threshold value of the first temperature control switch (18), the signal of the first port (28) is on, otherwise, the signal is off; when the first output optical fiber (11) is inserted into the first output port (9) and the temperature of the first output port (9) is lower than the threshold value of the second temperature control switch (19), the signal of the tenth port (37) is on, otherwise, the signal is off; when a second output optical fiber (12) is inserted into the second output port (10) and the temperature of the second output port (10) is lower than the threshold value of the third temperature-controlled switch (20), the signal of the eighth port (35) is a connection, otherwise, the signal is an open circuit; when the temperature of the light receiver (6) is lower than the threshold value of the fourth temperature control switch (21), the signal of the sixth port (33) is a pass signal, otherwise, the signal is a break signal; when the size of the scattered light detected by the first photoelectric detector (26) is lower than a threshold value set by the optical gate, a signal of the ninth port (36) is a pass signal, otherwise, the signal is a cut-off signal; when the scattered light detected by the second photoelectric detector (27) is lower than a threshold value set by the optical gate, the signal of the seventh port (34) is a pass signal, otherwise, the signal is a cut-off signal.
3. The optical shutter for a time-sharing fiber laser having a safety monitoring function according to claim 2, characterized in that: and when signals of the first port (28), the sixth port (33), the seventh port (34), the eighth port (35), the ninth port (36) and the tenth port (37) are all on signals, the optical gate state is normal, and when at least one signal is an off signal, the optical gate state is abnormal.
4. The optical shutter for a time-sharing fiber laser having a safety monitoring function according to claim 2, characterized in that: when the signal of the first port (28) is on, the laser can output laser, and when the signal of the first port (28) is off, the laser cannot output laser.
5. The optical shutter for a time-sharing fiber laser having a safety monitoring function according to claim 1, characterized in that: the eleventh port (38) and the twelfth port (39) respectively control the first reflector (4) and the second reflector (5) to move; when the proximity switch II (23) detects the position of the first reflector (4), the first reflector (4) stops moving, and the first reflector (4) enters the light path; when the proximity switch (22) detects the position of the first reflector (4), the first reflector (4) stops moving, and the first reflector (4) withdraws from the optical path; when the proximity switch (25) of the fourth number detects the position of the second reflecting mirror (5), the second reflecting mirror (5) stops moving, and the second reflecting mirror (5) enters the optical path; when the proximity switch (24) III detects the position of the second reflecting mirror (5), the second reflecting mirror (5) stops moving, and the second reflecting mirror (5) withdraws from the optical path.
6. The optical shutter for a time-sharing fiber laser having a safety monitoring function according to claim 5, characterized in that: when the first reflector (4) enters the optical path and the second reflector (5) withdraws from the optical path, the laser light is transmitted from the first output optical fiber (11); when the first mirror (4) is withdrawn from the optical path and the second mirror (5) is brought into the optical path, the laser light is transmitted from the second output optical fiber (12).
7. The optical shutter for a time-sharing fiber laser having a safety monitoring function according to claim 1, characterized in that: the optical gate comprises a first reflector (4), a first focusing mirror (7), a first output port (9), a second electrode plate (16), a second temperature control switch (19), a first proximity switch (22), a second proximity switch (23), a first photoelectric detector (26) and a first output optical fiber (11), and a transmission channel of the optical gate can be formed and can be expanded side by side according to the number of transmission channels.
8. The optical shutter for a time-sharing fiber laser having a safety monitoring function according to claim 1, characterized in that: the liquid crystal screen (14) displays the signal state of all the detectors, and can control the first reflecting mirror (4) and the second reflecting mirror (5) to enter the optical path or withdraw the optical path.
9. A safety monitoring method for an optical gate for a time-sharing type optical fiber laser having a safety monitoring function according to any one of claims 1 to 8, characterized by comprising the following steps:
step 1, installing and adjusting a safety monitoring system of an optical gate for a time-sharing optical fiber laser, and turning to step 2;
step 2, switching on an optical shutter power supply, detecting the state of the optical shutter by the integrated circuit board (13), switching to step 3 when the state of the optical shutter is normal, and switching to step 1 when the state of the optical shutter is abnormal;
step 3, when the first output optical fiber (11) is required to output laser, controlling a signal of the first port (28) to be an open circuit signal, controlling the first reflector (4) to enter a light path and the second reflector (5) to withdraw from the light path through the No. eleven port (38) and the No. twelve port (39), and turning to the step 4; when the second output optical fiber (12) is required to output laser, controlling a signal of the first port (28) to be an open circuit signal, controlling the first reflector (4) to withdraw from the optical path and the second reflector (5) to enter the optical path through the No. eleven port (38) and the No. twelve port (39), and turning to the step 4;
step 4, controlling a first port (28) signal to be kept as a channel signal, controlling a laser to input laser, outputting the laser from the selected output optical fiber at the moment, and turning to step 5;
and step 5, the optical gate works normally, the integrated circuit board (13) continuously detects the state of the optical gate, the step 5 is carried out when the state of the optical gate is normal, the step 1 is carried out when the state of the optical gate is abnormal, and the step 3 is carried out when the output optical fiber needs to be switched.
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| CN115993691B (en) * | 2023-03-23 | 2023-07-04 | 武汉锐科光纤激光技术股份有限公司 | Optical path coupling system and control method thereof |
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