CN110445004B - Optical fiber controller, optical fiber laser and cutting machine - Google Patents
Optical fiber controller, optical fiber laser and cutting machine Download PDFInfo
- Publication number
- CN110445004B CN110445004B CN201910726629.7A CN201910726629A CN110445004B CN 110445004 B CN110445004 B CN 110445004B CN 201910726629 A CN201910726629 A CN 201910726629A CN 110445004 B CN110445004 B CN 110445004B
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 37
- 230000001788 irregular Effects 0.000 claims abstract description 22
- 239000000835 fiber Substances 0.000 claims description 40
- 238000001914 filtration Methods 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 238000003698 laser cutting Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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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
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/0912—Electronics or drivers for the pump source, i.e. details of drivers or circuitry specific for laser pumping
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Laser Beam Processing (AREA)
- Optical Couplings Of Light Guides (AREA)
- Optical Communication System (AREA)
Abstract
The application discloses an optical fiber controller, an optical fiber laser and a cutting machine. The optical fiber controller is applied to an optical fiber laser and comprises a first controller and a second controller, wherein the first controller and the second controller are respectively connected with an external controller of a cutting machine, the first type signal and the second type signal transmitted by the external controller are received, the first controller also comprises a filter, and inherent irregular noise in the first type signal can be filtered through the filter, so that the receiving signal of the optical fiber controller is purified, the optical fiber laser does not generate false alarm and false action, and the technical effect of user required work can be accurately achieved.
Description
Technical Field
The invention relates to the technical field of optical fiber controllers, in particular to an optical fiber controller, an optical fiber laser and a cutting machine.
Background
The fiber laser can be used for cutting, welding, marking and the like, and when the fiber laser is used for cutting occasions, the fiber laser is connected with a controller of the cutting machine, and the controller of the cutting machine is used for controlling the movement of the cutting head, such as the movement track and the movement speed of the cutting head, and controlling the operation of the fiber laser.
However, in the practical application process, the application of the fiber laser can be subjected to field electromagnetic interference, so that various control signals are doped into external interference noise, in addition, the application of the fiber laser can also encounter more severe situations, namely, the signals sent out by the controller of a plurality of cutting machines are irregular, very short peaks and valleys frequently exist, the uncertainty of arrival time, amplitude, duration and the like exists on the signals, which is equivalent to sending error instructions to the fiber laser, and the fiber laser can not work according to the requirements of customers, even can alarm mistakenly, damage workpieces and damage equipment, so that the problems need to be solved.
Disclosure of Invention
In view of the problem of inherent irregular noise in the signals received by the fiber lasers of the prior art, a fiber controller, a fiber laser and a cutter of the present invention are proposed to overcome the above problems.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
According to one aspect of the present invention, there is provided a fiber controller for use in a fiber laser for connecting to an external controller disposed in a cutter or welder, comprising: the first controller and the second controller are respectively connected with the external controller; the first controller includes a filter;
The first controller is used for receiving the first type of signals sent by the external controller and filtering inherent irregular noise in the first type of signals according to the filter;
the second controller is used for receiving the second type signal sent by the external controller.
Optionally, the first type of signal includes one or more of: a laser enable signal, a laser modulated pulse signal, a laser alignment control signal;
The second type of signal comprises: a laser intensity control signal from the external controller.
Optionally, the filter is configured to filter out inherent irregular noise at a preset period, where the inherent irregular noise is represented as a voltage smaller than a preset characteristic width.
Optionally, the voltage less than the preset characteristic width includes a spike pulse noise superimposed on the low level signal and/or a spike valley noise superimposed on the high level signal.
Optionally, the first controller is configured to keep the received signal in a preset period, and output the useful signal after noise filtering when the preset period is over.
Optionally, the first controller is further configured to send a laser failure signal to the external controller.
Optionally, the optical fiber controller further includes: a serial interface or a network port;
The second controller is used for being connected with the external controller through the serial interface or the network port so as to carry out serial communication.
Optionally, the first controller is implemented by an FPGA; the second controller is realized through a singlechip.
According to another aspect of the present invention there is provided a fibre laser comprising a fibre controller as claimed in any one of the preceding claims.
According to a further aspect of the present invention there is provided a cutter comprising a fibre laser as described above; the external controller is a controller of the cutting machine.
In summary, the beneficial effects of the invention are as follows:
the optical fiber controller comprises a first controller and a second controller which are respectively used for being connected with an external controller to receive a first type signal and a second type signal which are sent by the external controller, and the first controller also comprises a filter, wherein inherent irregular noise in the first type signal can be filtered through the filter, so that the receiving signal of the optical fiber controller is purified, and the optical fiber laser can accurately achieve the technical effect that a user requires to work.
Drawings
FIG. 1 is a schematic diagram of an optical fiber controller according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a connection relationship between a fiber laser and a controller of a cutter according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a fiber controller of the present invention filtering out signal inherent irregularities;
FIG. 4 is a schematic diagram of an optical fiber controller of the present invention filtering out signal inherent irregularities;
in the figure, 100, a fiber laser; 110. a first controller; 111. a filter; 120. a second controller; 200. an external controller.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
The technical conception of the invention is as follows: the first controller and the second controller are respectively used for connecting the external controller to receive the first type signals and the second type signals sent by the external controller, and the first controller further comprises a filter, and inherent irregular noise in the first type signals can be filtered through the filter, so that the received signals of the optical fiber controller are purified, and the optical fiber laser can accurately achieve the technical effect of user required work.
Fig. 1 shows an embodiment of the optical fiber controller of the present invention applied to a fiber laser for connecting an external controller disposed in a cutter or a welder, and as shown in fig. 1, the optical fiber controller 100 includes: a first controller 110 and a second controller 120 respectively connected to the external controller 200; the first controller 110 includes a filter 111.
The first controller 110 is configured to receive the first type signal sent by the external controller 200, and filter out inherent irregular noise in the first type signal according to the filter 111.
Wherein the first type of signal comprises one or more of the following: a laser enable signal, a laser modulated pulse signal, and a laser alignment control signal (for controlling laser alignment to direct red light). These signals are mainly digital control signals with strict precision requirements, and if there is an error component, the error operation of the fiber laser is caused. In the process of transmitting the signals to the fiber laser through the lead, the signals are not only easy to be subjected to external electromagnetic interference, but also worse, the signals are not regular in the first type of signals sent by the external controller, especially the low-end cutting machine controller, so that the accurate work of the fiber laser can be influenced. Therefore, the optical fiber controller 100 of the present application eliminates the inherent irregular noise in these signals by the filter 111 of the first controller 110, so that the erroneous influence caused by the noise can be avoided, and the optical fiber laser can accurately operate according to the setting requirements of the user.
And the second controller 120 of the optical fiber controller 100 is configured to receive the second type signal sent by the external controller 200.
The second type of signal may include a laser intensity control signal from an external controller, etc., the laser intensity control signal being an analog control signal of 1 to 10V for controlling the output laser intensity of the fiber laser.
Therefore, the optical fiber controller 100 of the present application receives two types of signals of the external controller through the connection of the first controller 110 and the second controller 120, so as to avoid crosstalk between signals, and is more beneficial to sharing processing pressure, so that the first controller 110 can better filter and process inherent irregular noise in the first type of signals.
Fig. 2 is a schematic diagram showing the connection relationship between one embodiment of the fiber laser of the present application and the controller of the cutter, in which the fiber controller of the above embodiment of the present application is provided. Referring to fig. 2, in this embodiment, the first controller 110 is implemented by an FPGA (Field-Programmable GATE ARRAY, i.e., a Field-Programmable gate array); the second controller 120 is implemented by a single-chip microcomputer MCU. The FPGA architecture is capable of efficiently processing digital signals, and the first controller 110 formed by the FPGA architecture can efficiently implement parallel operations to implement various digital processing procedures. The singlechip is integrated with various communication interfaces and analog acquisition functions, and the singlechip forms the second controller 120, so that the singlechip can be used for conveniently acquiring and processing laser intensity control signals sent by the external controller. Further, communication between the first controller 110 and the second controller 120 may be performed inside the optical fiber controller 100.
In one embodiment of the present application, the filter 111 is configured to test the first type of signal with a preset period τ, and filter out inherent irregular noise, which is a voltage less than a preset characteristic width τ.
For example, in the first type of signal processed by the filter 111, voltages less than the predetermined characteristic width include sharp peak impulse noise superimposed on the low level signal (see fig. 3), and/or sharp valley noise superimposed on the high level signal (see fig. 4), these peaks and valleys of the irregular noise being significantly less than the characteristic width of the effective signal required by the user, which, if not processed, would affect the accurate operation of the fiber laser. The optical fiber controller 100 of the application filters out the pulse and the valley which are smaller than the preset characteristic width tau through the filter 111 of the first controller 110, thereby eliminating the inherent error component in the signals sent by the external controller and ensuring the accurate work of the optical fiber laser.
In one embodiment of the present application, the first controller 110 is configured to retain the received signal for a preset period τ, and output the filtered useful signal at the end of the preset period τ. For a valid signal, such as pulses and valleys having a width not less than the preset feature width, it is not yet possible to verify whether it is satisfactory within a preset period of measurement, and thus, to avoid interference, whether the signal is a valid voltage signal or an irregular noise, it is only ignored, which results in a part of the useful voltage signal having been ignored when it was verified. Therefore, the first controller 110 of the present application retains the received signal in the preset period τ, and outputs the filtered useful signal again at the end of the preset period τ, so as to keep the width of the processed useful voltage signal unchanged. The preset feature width may be set by a user, or may be a minimum allowable width and a maximum allowable width built in the optical fiber controller 100 according to different situations.
Referring to fig. 3 and 4, the filtering process of the optical fiber controller of the present application will be described by taking the processing of the laser modulated pulse signal as an example:
The FPGA as the first controller tests the received laser modulation pulse in real time with a preset period tau, if the width of a certain pulse/valley is judged to be smaller than the preset characteristic width in one period tau for testing, the pulse/valley is confirmed to be an inherent irregular noise, if the width of the pulse/valley is judged to be not smaller than the preset characteristic width, the pulse/valley is confirmed to be an effective pulse/valley, and the effective pulse/valley is reserved; in addition, the FPGA outputs the processed modulated signal from the start position of the pulse/valley to be tested after the period τ (the pulse/valley is determined to be the effective signal) without outputting the effective component of the processed modulated signal during the period τ of the signal test, so that the width of the effective pulse/valley in the processed modulated signal is kept unchanged. As shown in fig. 3, irregular pulse spikes, shown by the dashed lines in the original modulated signal, have been filtered out in the processed signal, while the width of the effective pulse is not affected. As shown in fig. 4, irregular sharp valleys, shown by the dashed lines in the original modulated signal, have been filtered out in the processed signal, while the width of the effective valleys is not affected.
Although the whole pulse modulated signal is delayed by τ during the filtering process, the preset period τ can typically be set to be less than 20 μs since all the effective voltage signals are delayed by the same period τ, and such a short delay has a small impact on the productivity and is therefore negligible.
Therefore, the application improves the working accuracy of the fiber laser by filtering out the inherent irregular component in the signal sent by the external controller, and can make the working such as laser cutting and the like better carried out according to the requirements set by users. In addition, in the present embodiment, the first controller 110 may also be used to filter the electromagnetic interference signal in the signal, and a circuit for filtering electromagnetic interference is well known to those skilled in the art, which is not described herein.
In one embodiment of the present application, the first controller 110 is further configured to send a laser failure signal to the external controller 200 for performing a fiber laser failure alarm.
In one embodiment of the present application, the fiber controller 100 further includes: a serial interface or a network port; the second controller 120 is configured to connect to an external controller through a serial interface or a network port for serial communication. Fig. 2 shows an embodiment of a schematic diagram of a second controller 120, which is formed by an MCU, in serial communication with the controller of the cutter via a serial interface.
The application also discloses a fiber laser, and the fiber laser is continuously shown with reference to fig. 2, and comprises any one of the fiber controllers, so that the first type signals and the second type signals sent by the external controller can be better received and processed, and the working accuracy is improved.
The application also discloses a cutting machine, which comprises the optical fiber laser, wherein an external controller connected with the optical fiber laser is the controller of the cutting machine, and inherent irregular components in signals sent by the controller of the cutting machine can be effectively filtered by the application, so that the accuracy of laser cutting is improved.
The foregoing is merely a specific embodiment of the invention and other modifications and variations can be made by those skilled in the art in light of the above teachings. It is to be understood by persons skilled in the art that the foregoing detailed description is provided for the purpose of illustrating the invention more fully, and that the scope of the invention is defined by the appended claims.
Claims (8)
1. An optical fiber controller for use in a fiber laser for connecting to an external controller disposed in a cutting or welding machine, comprising: the first controller and the second controller are respectively connected with the external controller; the first controller includes a filter;
The first controller is used for receiving the first type of signals sent by the external controller and filtering inherent irregular noise in the first type of signals according to the filter;
the second controller is used for receiving a second type signal sent by the external controller;
the first type of signal includes one or more of the following: a laser enable signal, a laser modulated pulse signal, a laser alignment control signal;
The second type of signal comprises: a laser intensity control signal from the external controller;
The filter is used for filtering out inherent irregular noise at a preset period, wherein the inherent irregular noise is represented as voltage smaller than a preset characteristic width.
2. The fiber optic controller of claim 1, wherein the voltage less than the predetermined characteristic width comprises a spike pulse noise superimposed on a low level signal and/or a spike valley noise superimposed on a high level signal.
3. The optical fiber controller according to claim 1, wherein,
The first controller is used for reserving the received signals in a preset period, and outputting useful signals after noise filtering when the preset period is finished.
4. The optical fiber controller according to claim 1, wherein,
The first controller is further configured to send a laser failure signal to the external controller.
5. The fiber optic controller of claim 1, further comprising: a serial interface or a network port;
The second controller is used for being connected with the external controller through the serial interface or the network port so as to carry out serial communication.
6. The fiber optic controller of claim 1, wherein the first controller is implemented by an FPGA; the second controller is realized through a singlechip.
7. A fibre laser comprising a fibre controller as claimed in any one of claims 1 to 6.
8. A cutter comprising the fiber laser of claim 7; the external controller is a controller of the cutting machine.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910726629.7A CN110445004B (en) | 2019-08-07 | 2019-08-07 | Optical fiber controller, optical fiber laser and cutting machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910726629.7A CN110445004B (en) | 2019-08-07 | 2019-08-07 | Optical fiber controller, optical fiber laser and cutting machine |
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| CN110445004A CN110445004A (en) | 2019-11-12 |
| CN110445004B true CN110445004B (en) | 2024-06-25 |
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| CN210296858U (en) * | 2019-08-07 | 2020-04-10 | 天津凯普林光电科技有限公司 | Optical fiber controller, optical fiber laser and cutting machine |
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| JPH07181605A (en) * | 1993-12-22 | 1995-07-21 | Canon Inc | Image forming device |
| US7486705B2 (en) * | 2004-03-31 | 2009-02-03 | Imra America, Inc. | Femtosecond laser processing system with process parameters, controls and feedback |
| JP4757557B2 (en) * | 2005-07-29 | 2011-08-24 | ミヤチテクノス株式会社 | Laser processing head |
| JP5760322B2 (en) * | 2009-03-11 | 2015-08-05 | オムロン株式会社 | Laser processing equipment |
| EP2741380B1 (en) * | 2012-06-26 | 2017-07-05 | Mitsubishi Electric Corporation | Laser output control device, laser oscillator, and laser output control method |
| US8691598B1 (en) * | 2012-12-06 | 2014-04-08 | Ultratech, Inc. | Dual-loop control for laser annealing of semiconductor wafers |
| SI24532A (en) * | 2013-11-05 | 2015-05-29 | Nela, Razvojni Center Za Elektroindustrijo In Elektroniko, D.O.O. | Adaptive laser bonding of the stator and rotor laminations |
| CN106324101A (en) * | 2016-10-20 | 2017-01-11 | 沈阳慧远自动化设备有限公司 | Laser shock strengthening on-line quality monitoring system and method based on sound pressure characteristic |
| CN209150478U (en) * | 2018-09-30 | 2019-07-23 | 天津凯普林光电科技有限公司 | A kind of optical fiber laser protection circuit |
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