CN112987197A - Optical device automatic coupling system based on FPGA and data acquisition method thereof - Google Patents
Optical device automatic coupling system based on FPGA and data acquisition method thereof Download PDFInfo
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- CN112987197A CN112987197A CN202110198734.5A CN202110198734A CN112987197A CN 112987197 A CN112987197 A CN 112987197A CN 202110198734 A CN202110198734 A CN 202110198734A CN 112987197 A CN112987197 A CN 112987197A
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- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
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Abstract
The invention discloses an optical device automatic coupling system based on FPGA, comprising: the system comprises a first multi-axis optical bench, a second multi-axis optical bench, an FPGA data acquisition unit and an industrial personal computer; the static optical bench is arranged between the first multi-axis optical bench and the second multi-axis optical bench, the industrial personal computer is respectively connected with the first multi-axis optical bench and the second multi-axis optical bench, each motor in the first multi-axis optical bench and each motor in the second multi-axis optical bench are respectively interacted with the FPGA data collector, and the FPGA data collector is further connected with the industrial personal computer. The invention also provides a data acquisition method of the optical device automatic coupling system based on the FPGA. The system provided by the invention allows the motor to continuously work, ensures that the real-time data can be efficiently, timely, parallelly and reliably collected in multiple paths under the condition that the motor continuously works, has no leakage, confusion or overflow, greatly shortens the coupling time of a single group of optical devices, and improves the efficiency of the coupling process of the optical devices.
Description
Technical Field
The invention belongs to the technical field of manufacturing of optical waveguide devices, and particularly relates to a coupling system of an optical waveguide device.
Background
With the development of communication technology, people have higher and higher requirements on information carrying capacity of communication networks, and optical devices are widely applied to communication systems by virtue of characteristics of large communication capacity, long transmission distance, small signal interference, good confidentiality, electromagnetic interference resistance, good transmission quality and the like, and are used for realizing functions of optical signal connection, energy splitting and combining, wavelength multiplexing-demultiplexing, optical path conversion, energy attenuation, direction blocking, photoelectric optical conversion, optical signal amplification, optical signal modulation and the like, so as to obtain good signal transmission effect.
Optical devices applied in communication systems are classified into optical active devices and optical passive devices according to their energy forms, and optical connectors, optical attenuators, optical couplers, optical multiplexers, optical isolators, circulators, optical filters, optical demultiplexers, optical modulators, lasers, photodetectors, optical amplifiers, and the like are used as specific forms.
In the specific manufacturing and using processes of the optical device, optical path coupling needs to be performed on the optical device and a device matched with the optical device, and in the conventional manufacturing process of the optical device, the optical path coupling process of the optical device is often completed by a manual adjustment method: and clamping the device needing optical path coupling on the corresponding optical bench, adjusting the optical bench, and manually finishing optical path alignment and optical path debugging by means of a microscope.
The mode has complex and complicated operation process, large manual investment and high professional requirements on operators, and optical devices produced by a manual adjustment method have poor consistency and traceability and are difficult to develop towards integration and scale.
In order to overcome the defects of the manual adjustment of the coupling optical device, the technical personnel in the field improve the coupling device, design and manufacture an automatic coupling method, and realize the coupling of the corresponding optical device in the form of the combination of an automatic control method and an electric control device. Take the technical scheme recorded in optical waveguide end-face coupling automatic core-adjusting instrument (Longcaihua, Chen Baxue, etc.; semiconductor optics 2002, 23 rd volume, 5 th). Please refer to fig. 1. Fig. 1 is a hardware block diagram of an automatic core adjustment system disclosed in the article "optical waveguide end-face coupling automatic core adjustment instrument", and it is clear from the diagram that the basic architecture of the core adjustment instrument is: the device comprises a six-dimensional precision adjusting device, an optical waveguide support, a high-stability light source, a high-sensitivity optical power meter, a computer, a driver, a stable power supply and the like, wherein the computer drives the six-dimensional precision adjusting device carrying corresponding optical devices to move through the driver respectively, after the core adjusting instrument is built, light builds a light path along the high-stability light source, one optical device to be coupled, the optical waveguide device and the other optical device to be coupled, the computer controls the two six-dimensional precision adjusting devices through the two drivers respectively, the optimal coupling position between the two optical devices to be coupled is obtained through rough scanning and fine scanning, and the process is repeated to finally confirm the coupling position.
Compared with the traditional method of manually adjusting coupling, the system architecture for completing coupling by adopting the electric control device has the characteristics of obvious reliability and controllability, capability of mass production, traceability of products and the like.
However, it should also be noted that, when the above technical solution is applied to an actual optical device coupling scenario, there is a very obvious problem of data acquisition difficulty: please refer to fig. 2, taking the journal as an example. Fig. 2 is a core adjustment scheme based on the basic architecture of the optical waveguide end-face coupling automatic core adjustment instrument, and it can be clearly known from the journal literature that, when the coarse scanning and the fine scanning are performed, the computer must control the corresponding six-dimensional precise adjustment device to operate at a specific step pitch along the X axis or the Y axis through the driver, and when the six-dimensional precise adjustment device operates at each step, the computer must control the computer to stop, and after the corresponding output of the optical power meter at the position is acquired, the next-step position adjustment of the six-dimensional precise adjustment device can be continued, so that the performance efficiency of the device is greatly reduced, and the whole coupling process is slowed down.
Disclosure of Invention
In order to solve the problems, the invention aims to provide an optical device automatic coupling system based on an FPGA, wherein an FPGA data collector with an FPGA chip is additionally arranged in the system, and the system is applied to a real-time data collection link in a coupling process, so that the characteristics of high speed and parallelism of the FPGA can be fully utilized, data can be collected efficiently and reliably, and the risk of missed data is reduced to the greatest extent.
The invention also aims to provide a data acquisition method of the optical device automatic coupling system based on the FPGA, which can ensure that the implementation data is acquired in time and does not overflow through 'sequential catch-up' of the input register module, the transfer buffer module and the output register module in the FPGA data acquisition device.
In order to achieve the purpose, the technical scheme of the invention is as follows:
an optical device automatic coupling system based on FPGA comprises: a first multi-axis optical bench having a plurality of motors for mounting one of optical devices to be coupled; a second multi-axis optical bench having a plurality of motors for mounting another optical device to be coupled; the FPGA data acquisition unit is internally provided with an FPGA chip and is used for acquiring real-time parameters in the coupling process of the optical device; the industrial personal computer is used for performing motion control on the coupling process of the optical devices and processing and analyzing real-time parameters in the coupling process of the optical devices to obtain the coupling results of the two optical devices to be coupled; and/or a static optical bench for carrying a solid state optical connector; the static optical bench is arranged between the first multi-axis optical bench and the second multi-axis optical bench, and the industrial personal computer is respectively connected with the first multi-axis optical bench and the second multi-axis optical bench and respectively drives each motor in the first multi-axis optical bench and each motor in the second multi-axis optical bench correspondingly; each motor in the first multi-axis optical bench and each motor in the second multi-axis optical bench are also interacted with an FPGA data collector respectively, and the FPGA data collectors collect real-time position data of the corresponding motors respectively; the FPGA data acquisition unit is also connected with an industrial personal computer.
The utility model provides a when technical scheme uses under specific optical device occasion, look at specific optical device's of treating the coupling constitution, set up first multiaxis optical bench, second multiaxis optical bench and/or static optical bench, each component part of optical device that will treat the coupling presss from both sides respectively on the optical bench that corresponds, control with the industrial computer has a plurality of motors, gather the real-time position of the motor that corresponds and the real-time output of optical power meter to the industrial computer through FPGA data collection ware, make analysis and judgment to the coupling condition by the industrial computer, carry out subsequent operation such as solidification of gluing behind the best coupling position that obtains optical device.
Because the FPGA data acquisition unit is arranged and the FPGA data acquisition unit finishes all data acquisition links in the whole coupling process, the FPGA data acquisition unit can fully play the characteristics of high-speed parallel, and can acquire multi-position and multi-path real-time data at a very high sampling rate, and meanwhile, because the high-speed and high-efficiency FPGA data acquisition unit is arranged, the industrial personal computer can control each motor in the first multi-axis optical bench and the second multi-axis optical bench to continuously work, and the output data of the optical power meter at the current position is detected without stopping every step, so that the coupling efficiency of the optical device is greatly improved.
Further, the system also comprises an optical source and an optical power meter; the light source is detachably connected to the first multi-axis optical bench, the optical power meter is detachably connected to the second multi-axis optical bench, and the optical power meter is arranged corresponding to the optical device clamped on the second multi-axis optical bench; the optical power meter is connected to the FPGA data acquisition unit, and the FPGA data acquisition unit correspondingly acquires output data of the optical power meter.
Furthermore, the FPGA data acquisition unit comprises an input registering module, a transfer cache module and an output registering module; the input registering module is simultaneously in interaction with the first multi-axis optical bench, the second multi-axis optical bench and the optical power meter, the input registering module is further in transmission value connection with the transfer cache module, the transfer cache module is further in transmission value connection with the output registering module, and the output registering module is connected to the industrial personal computer.
The invention also discloses a data acquisition method of the optical device automatic coupling system based on the FPGA, which comprises the following steps:
s1: clamping an optical device to be coupled;
s2: coarse tuning coupling preparation;
s3: starting coarse tuning coupling;
s4: the FPGA data acquisition unit acquires real-time position data of each motor in the first multi-axis optical bench and the second multi-axis optical bench and corresponding output data of the optical power meter, and stores the real-time position data and the corresponding output data in the input register module;
s5: the input register module transfers data to the transfer cache module;
s6: the output register module reads data from the transfer cache module and outputs the data to the industrial personal computer;
s7: loop S4-S6 until the coarse tuning coupling is completed.
Further, S1 specifically includes: one of the optical devices to be coupled is mounted on a first multi-axis optical bench and the other optical device to be coupled is mounted on a second multi-axis optical bench.
Further, S2 specifically includes:
s21: resetting each module in the FPGA data acquisition unit;
s22: acquiring historical data from the coupling process of the optical device in the past period, acquiring the optimal coupling position of the optical device in the past period, and taking the position as the pre-coupling position of the optical device coupling at the time; the industrial personal computer controls each motor in the first multi-axis optical bench and the second multi-axis optical bench to move to the pre-coupling position respectively;
s23: the method comprises the following steps that an industrial personal computer plans an operation scheme for each motor in a first multi-axis optical bench and a second multi-axis optical bench, wherein the operation scheme specifically comprises the starting and stopping time, the operation distance, the operation direction and the operation path of each motor;
s24: the industrial personal computer designates a sampling scheme for the optical power meter, wherein the sampling scheme comprises a sampling channel, a sampling time point and a sampling frequency of the optical power meter.
Further, S4 specifically includes:
s41: real-time position data of each motor in the first multi-axis optical bench and the second multi-axis optical bench and corresponding output data of the optical power meter are accessed into the FPGA data acquisition unit in the course of coarse tuning coupling;
s42: and integrating the current position data of the corresponding motor in the first multi-axis optical bench, the current position data of the corresponding motor in the first pair of multi-axis optical benches and the second multi-axis optical bench and the current output data of the optical power meter into a data packet under each sampling point by taking the sampling points as the division, and writing the data packet into the input registering module according to the sequence of the sampling points.
Further, S5 specifically includes:
s51: the input register module presets a data unloading threshold value;
s52: the input register module compares the real-time data storage capacity with a data unloading threshold, and if the real-time data storage capacity is larger than or equal to the data unloading threshold, the input register module jumps to S53, otherwise, the input register module loops to S52;
s53: the input register module writes the data stored in the input register module into the transfer cache module, and releases the transferred storage space to wait for coverage.
Further, S6 specifically includes:
s61: the output register module presets a data reading threshold value; a current write address pointer is defined in the transit cache module and used for indicating a real-time write address of data; defining a current read address pointer for indicating a real-time read address of data;
s62: judging whether the data storage amount in the output register is smaller than a data reading threshold value, if so, jumping to S63, otherwise, looping to S62;
s63: if the sum of the assignment of the current read address pointer and the data read threshold is greater than the assignment of the current read address pointer, judging that the current write-in quantity of the internal data of the transit cache module is less than the read-out quantity, and jumping to S64; otherwise, waiting;
s64: the output register module reads quantitative data from the transfer cache module according to a data reading threshold value;
s65: and the output register module outputs the read data to the industrial personal computer.
The data acquisition method provided by the application makes full use of the internal register structure of the FPGA data acquisition unit, processes data entering the FPGA data acquisition unit in a 'catch-up' mode through the cooperation of the input register module, the intermediate cache module and the output register module, completes the acquisition of real-time position data of each motor and real-time output data of the optical power device in the coupling process, matches the data throughput efficiency of the coupling process and the industrial personal computer, and fully ensures that each register in the FPGA data acquisition unit does not overflow when the field data is efficiently and quickly acquired.
The invention has the advantages that: compared with the prior art, the optical device automatic coupling system based on the FPGA allows the motor to continuously work, ensures that real-time data are efficiently, timely, parallelly and reliably collected in multiple paths under the condition that the motor continuously works, is not leaked, confused or overflowed, greatly shortens the coupling time of a single group of optical devices, and improves the efficiency of the coupling process of the optical devices.
Drawings
Fig. 1 is a hardware block diagram of an automatic coring system provided in the prior art.
Fig. 2 is a flow chart of the operation of the alignment scheme provided in the prior art.
Fig. 3 is a block diagram of an automatic coupling system of a 1 × 8 PLC planar optical waveguide splitter based on an FPGA according to an embodiment.
FIG. 4 is a path planning diagram for the PC to plan a traversal in a "zig-zag" path for the X-axis motor and the Y-axis motor in the first and second six-axis optical benches, respectively.
FIG. 5 is a path planning diagram for PC planning the traversal of the X-axis motor and the Y-axis motor in the first and second six-axis optical benches, respectively, in an involute spiral path.
Fig. 6 is a schematic data acquisition diagram of a data acquisition method of an automatic coupling system of a 1 × 8 PLC planar optical waveguide splitter based on an FPGA according to an embodiment.
Fig. 7 is a schematic diagram of specific data transmission in an FPGA monitoring card in the data acquisition method of the automatic coupling system of the FPGA-based 1 × 8 PLC planar optical waveguide splitter according to the embodiment.
Fig. 8 is a schematic diagram of 3D visualization obtained by analyzing and converting data on a PC when the data acquisition method of the automatic coupling system of the FPGA-based 1 × 8 PLC planar optical waveguide splitter provided in the embodiment is executed.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In order to achieve the purpose, the technical scheme of the invention is as follows:
please refer to fig. 3-8.
In this embodiment, an automatic coupling system of a 1 × 8 PLC planar optical waveguide splitter based on an FPGA is provided, where an optical axis of an optical device is a Z-axis direction, the system including:
the first six-axis optical bench is used for carrying an optical device at the light inlet end of the PLC planar optical waveguide splitter and comprises an X-axis motor, a Y-axis motor, a Z-axis motor, an X-axis rotating motor, a Y-axis rotating motor and a Z-axis rotating motor;
a static optical bench for mounting a 1 × 8 optical splitter;
the second six-axis optical bench is used for carrying an optical device at the light outlet end of the PLC planar optical waveguide splitter; the second six-axis optical bench comprises an X-axis motor, a Y-axis motor, a Z-axis motor, an X-axis rotating motor, a Y-axis rotating motor and a Z-axis rotating motor;
the FPGA monitoring card is internally provided with an FPGA chip and is used for collecting real-time parameters in the coupling process of the optical device; a motor driver for driving each motor in the first six-axis optical bench and each motor in the second six-axis optical bench;
the nanoscale laser light source is used for emitting laser and providing light sources for devices to be coupled; the optical power meter is used for sensing the illumination intensity and converting the light intensity signal into an electric signal to be output;
the PC is used for performing motion control on the optical device coupling process and processing and analyzing real-time parameters in the optical device coupling process to obtain the coupling result of the two optical devices to be coupled, and the PC comprises a motion control card;
the static optical bench is arranged between the first six-axis optical bench and the second six-axis optical bench, the PC is interacted with the FPGA monitoring card, the FPGA monitoring card is also interacted with the motor driver, and the driver is respectively connected with each motor in the first six-axis optical bench and the second six-axis optical bench and correspondingly drives each motor to independently act. The nano-level laser source is arranged on the first six-axis optical bench, and when an optical device at the light inlet end in the PLC planar optical waveguide splitter is clamped on the first six-axis optical bench, laser emitted by the nano-level laser source is introduced into the optical device. And the optical power meter is arranged on the second six-axis optical bench, and when an optical device at the light outlet end in the PLC planar optical waveguide splitter is clamped on the second six-axis optical bench and the coupling operation is required, the sensitive end of the optical power meter is jointed with the optical path of the optical device. The power meter is provided with at least three sensitive ends CH1, CH2 and CH3, the output end of the power meter respectively outputs corresponding signals CH1 ', CH 2' and CH3 'of the three sensitive ends CH1, CH2 and CH3, and the three output signals CH 1', CH2 'and CH 3' are connected to an FPGA monitoring card. And when the multimode optical fiber is applied, the light inlet end of the multimode optical fiber is jointed with any path of optical path of an optical device clamped on the second six-axis optical bench, and the light outlet end of the multimode optical fiber is connected with one sensitive end CH3 of the optical power meter.
Further, IN the present embodiment, the FPGA monitor card includes an input register FIFO _ IN, a transfer buffer DDR, and an output register FIFO _ OUT; data information of three motors IN the first six-axis optical bench, six motors IN the second six-axis optical bench and three paths of output signals IN the optical power meter are respectively accessed to an input register FIFO _ IN, data IN the input register FIFO _ IN and a transfer register DDR have transfer value interaction, and data IN the transfer register DDR and an output register FIFO _ OUT have transfer value interaction; the output register FIFO _ OUT feeds back data to the PC through a serial port communication protocol.
In this embodiment, a data acquisition method of an optical device automatic coupling system based on an FPGA is further provided, where the method includes the following steps:
s1: clamping an optical device to be coupled;
s2: coarse tuning coupling preparation;
s3: starting coarse tuning coupling;
s4: the FPGA data acquisition unit acquires real-time position data of each motor in the first six-axis optical bench and the second six-axis optical bench and corresponding output data of the optical power meter, and stores the real-time position data and the corresponding output data in the input register module;
s5: the input register module transfers data to the transfer cache module;
s6: the output register module reads data from the transfer cache module and outputs the data to the PC;
s7: loop S4-S6 until the coarse tuning coupling is completed.
Further, in this embodiment, S1 specifically includes the following sub-steps: clamping an optical device at a light inlet end in a 1 x 8 PLC planar optical waveguide splitter on a first six-axis optical bench, and keeping the conduction of laser emitted by a nano-scale laser source and the optical device; and clamping the 1X 8 optical splitter on a static optical bench, and clamping the optical device at the light outlet end of the 1X 8 PLC planar optical waveguide splitter on a second six-axis optical bench.
Further, in this embodiment, S2 specifically includes the following sub-steps:
s21: setting zero for each data storage space and each address pointer IN an input register FIFO _ IN, a transfer register DDR and an output register FIFO _ OUT IN the FPGA monitoring card;
s22: acquiring historical data from the coupling process of the optical device in the past period, acquiring the optimal coupling position of the optical device in the past period, and taking the position as the pre-coupling position of the optical device coupling at the time; the PC controls each motor in the first six-axis optical bench and the second six-axis optical bench to move to the pre-coupling position through a driver;
s23: moving the multimode optical fiber, clamping the multimode optical fiber on a second six-axis optical bench, keeping the optical input end of the multimode optical fiber jointed with any optical path of an optical device at the optical output end of the 1 x 8 PLC planar optical waveguide splitter, and accessing the optical output end of the multimode optical fiber to one sensitive end CH3 of an optical power meter;
s23: the PC plans an operation scheme for each motor in the first six-axis optical bench and the second six-axis optical bench, wherein the operation scheme specifically comprises the start-stop time, the operation interval, the operation direction and the operation path of each motor;
in one embodiment, the PC plans the X-axis motor and the Y-axis motor in the first six-axis optical bench and the second six-axis optical bench, respectively, to traverse a zigzag path to complete XY-plane coarse search coverage;
in one embodiment, the PC plans the X-axis motor and the Y-axis motor in the first six-axis optical bench and the second six-axis optical bench, respectively, to traverse an involute spiral path to complete XY-plane coarse search coverage;
s24: the PC designates a sampling scheme for the optical power meter, wherein the sampling scheme comprises a sampling channel, a sampling time point and a sampling frequency of the optical power meter;
s25: the PC controls parameters of a Z-axis motor in the second six-axis optical bench on the Z axis to be adjusted through a driver, when a CH 3' signal correspondingly output by one sensitive end CH3 of the optical power meter reaches a peak value, the parameters of the motors in the first six-axis optical bench and the second six-axis optical bench are kept unchanged, and the searching process of the multimode optical fiber from no light to light is completed;
s26: and (4) removing the multimode optical fiber to finish coarse tuning coupling preparation.
Further, in this embodiment, S3 specifically includes the following sub-steps:
s31: the PC controls the rotation angles of an X-axis rotation motor, a Y-axis rotation motor and a Z-axis rotation motor in the first six-axis optical bench through a driver, so that the rotation angles of the X-axis rotation motor, the Y-axis rotation motor and the Z-axis rotation motor in the first six-axis optical bench are kept unchanged after an optical device clamped on the first six-axis optical bench is parallel to and aligned with the 1X 8 optical splitter;
s32: the PC controls an X-axis motor and a Y-axis motor in a first six-axis optical bench to move to a traversal starting point preset by an operation scheme through a driver, controls the X-axis motor and the Y-axis motor to move according to the operation scheme until the whole operation scheme is executed, and simultaneously synchronously samples by the optical power meter according to the preset sampling scheme until the whole sampling scheme is executed;
s33: and the PC controls the X-axis motor and the Y-axis motor in the second six-axis optical bench to move to a traversal starting point preset by an operation scheme through a driver, controls the X-axis motor and the Y-axis motor to move according to the operation scheme, and synchronously samples by the optical power meter according to a preset sampling scheme.
Further, S4 specifically includes the following sub-steps:
s41: real-time position data of each motor in the first six-axis optical bench and the second six-axis optical bench and corresponding output data of the optical power meter are accessed into the FPGA monitoring card in the course of coarse tuning coupling;
s42: and integrating the current position data of the corresponding motor in the first six-axis optical bench, the current position data of the corresponding motor in the second six-axis optical bench and the current output data of the optical power meter into a data packet under each sampling point by taking the sampling points as the division, and writing the data packet into the input registering module according to the sequence of the sampling points.
Further, S5 specifically includes:
s51: the input register module presets a data unloading threshold value;
s52: the input register module compares the real-time data storage capacity with a data unloading threshold, and if the real-time data storage capacity is larger than or equal to the data unloading threshold, the input register module jumps to S53, otherwise, the input register module loops to S52;
s53: the input register module writes the data stored in the input register module into the transfer cache module, and releases the transferred storage space to wait for coverage.
Further, S6 specifically includes:
s61: the output register module presets a data reading threshold value; defining a current write address pointer in the transit cache module, wherein the current write address pointer is used for indicating a real-time write address of data; defining a current read address pointer for indicating a real-time read address of data;
s62: judging whether the data storage amount in the output register is smaller than a data reading threshold value, if so, jumping to S63, otherwise, looping to S62;
s63: if the sum of the assignment of the current read address pointer and the data read threshold is greater than the assignment of the current read address pointer, judging that the current write-in quantity of the internal data of the transit cache module is less than the read-out quantity, and jumping to S64; otherwise, waiting;
s64: the output register module reads quantitative data from the transfer cache module according to the data reading threshold value;
s65: the output register module outputs the read data to the PC;
s66: the PC controls the first six-axis optical bench and the second six-axis optical bench to perform fine tuning coupling through the driver, and simultaneously acquires real-time data in the fine tuning coupling process through the FPGA monitoring card, and the FPGA monitoring card feeds back the fine tuning coupling number to the PC;
s67: the PC collects data, and analyzes and converts the data into a 3D visual drawing by using specific engineering software, and a technician analyzes the coupling condition of the three-terminal optical device in the 1 × 8 PLC planar optical waveguide splitter participating in the coupling based on the 3D visual drawing;
s68: and determining the optimal coupling position of the 1 × 8 PLC planar optical waveguide splitter participating in the coupling, adjusting corresponding motor parameters in the first six-axis optical bench and the second six-axis optical bench, adjusting the optical devices at the light inlet end and the light outlet end to the optimal coupling position, dispensing and curing, and completing the coupling.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. An optical device automatic coupling system based on FPGA is characterized in that the system comprises:
a first multi-axis optical bench having a plurality of motors for mounting one of optical devices to be coupled;
a second multi-axis optical bench having a plurality of motors for mounting another optical device to be coupled;
the FPGA data acquisition unit is internally provided with an FPGA chip and is used for acquiring real-time parameters in the coupling process of the optical device;
the industrial personal computer is used for performing motion control on the coupling process of the optical devices and processing and analyzing real-time parameters in the coupling process of the optical devices to obtain the coupling results of the two optical devices to be coupled;
and/or a static optical bench for carrying a solid state optical connector;
the static optical bench is arranged between the first multi-axis optical bench and the second multi-axis optical bench, and the industrial personal computer is respectively connected with the first multi-axis optical bench and the second multi-axis optical bench and respectively drives each motor in the first multi-axis optical bench and each motor in the second multi-axis optical bench correspondingly; each motor in the first multi-axis optical bench and each motor in the second multi-axis optical bench are also interacted with the FPGA data collector respectively, and the FPGA data collector collects real-time position data of the corresponding motors respectively; the FPGA data acquisition unit is also connected with the industrial personal computer.
2. The FPGA-based optical device auto-coupling system of claim 1 further comprising an optical source and an optical power meter; the light source is detachably connected to the first multi-axis optical bench, the optical power meter is detachably connected to the second multi-axis optical bench, and the optical power meter is arranged corresponding to an optical device clamped on the second multi-axis optical bench;
the optical power meter is connected to the FPGA data acquisition unit, and the FPGA data acquisition unit correspondingly acquires the output data of the optical power meter.
3. The automatic optical device coupling system according to claim 2, wherein the FPGA data collector comprises an input register module, a transfer buffer module and an output register module; the input registering module is simultaneously in interaction with the first multi-axis optical bench, the second multi-axis optical bench and the optical power meter, the input registering module is further in value transmission connection with a transfer cache module, the transfer cache module is further in value transmission connection with the output registering module, and the output registering module is connected to the industrial personal computer.
4. A data acquisition method of an FPGA-based optical device automatic coupling system, which is performed by the FPGA-based optical device automatic coupling system according to claim 4, wherein the method comprises:
s1: clamping an optical device to be coupled;
s2: coarse tuning coupling preparation;
s3: starting coarse tuning coupling;
s4: the FPGA data acquisition unit acquires real-time position data of each motor in the first multi-axis optical bench and the second multi-axis optical bench and corresponding output data of the optical power meter, and stores the real-time position data and the corresponding output data in the input registering module;
s5: the input register module is used for transferring data to the transfer cache module;
s6: the output register module reads data from the transfer cache module and outputs the data to the industrial personal computer;
s7: loop S4-S6 until the coarse tuning coupling is completed.
5. The data acquisition method of the FPGA-based optical device automatic coupling system according to claim 4, wherein the S1 specifically is: one of the optical devices to be coupled is mounted on the first multi-axis optical bench and the other optical device to be coupled is mounted on the second multi-axis optical bench.
6. The data acquisition method of the FPGA-based optical device automatic coupling system according to claim 4, wherein the S2 specifically is:
s21: resetting each module in the FPGA data acquisition unit;
s22: acquiring historical data from the coupling process of the optical device in the past period, acquiring the optimal coupling position of the optical device in the past period, and taking the position as the pre-coupling position of the optical device coupling at the time; the tool controller controls each motor in the first multi-axis optical bench and the second multi-axis optical bench to move to a pre-coupling position respectively;
s23: the industrial personal computer plans an operation scheme for each motor in the first multi-axis optical bench and the second multi-axis optical bench, wherein the operation scheme specifically comprises the start-stop time, the operation distance, the operation direction and the operation path of each motor;
s24: and the industrial personal computer designates a sampling scheme for the optical power meter, wherein the sampling scheme comprises a sampling channel, a sampling time point and a sampling frequency of the optical power meter.
7. The data acquisition method of the FPGA-based optical device automatic coupling system according to claim 4, wherein the S4 specifically is:
s41: in the course of coarse tuning coupling, real-time position data of each motor in the first multi-axis optical bench and the second multi-axis optical bench and corresponding output data of the optical power meter are all accessed to the FPGA data acquisition unit;
s42: and integrating the current position data of the corresponding motor in the first multi-axis optical bench, the current position data of the corresponding motor in the first pair of multi-axis optical benches and the second multi-axis optical bench and the current output data of the optical power meter into a data packet under each sampling point by taking the sampling points as the division, and writing the data packet into the input registering module according to the sequence of the sampling points.
8. The data acquisition method of the FPGA-based optical device automatic coupling system according to claim 7, wherein the S5 specifically is:
s51: the input register module presets a data unloading threshold value;
s52: the input register module compares the real-time data storage capacity with a data unloading threshold, and if the real-time data storage capacity is greater than or equal to the data unloading threshold, the input register module jumps to S53, otherwise, the input register module loops to S52;
s53: the input register module writes the data stored in the input register module into the transfer cache module, and releases the transferred storage space to wait for coverage.
9. The data acquisition method of the FPGA-based optical device automatic coupling system according to claim 8, wherein the S6 specifically is:
s61: the output register module presets a data reading threshold value; a current write address pointer is defined in the transit cache module and used for indicating a real-time write address of data; defining a current read address pointer for indicating a real-time read address of data;
s62: judging whether the data storage amount in the output register is smaller than a data reading threshold value, if so, jumping to S63, otherwise, looping to S62;
s63: if the sum of the assignment of the current read address pointer and the data read threshold is greater than the assignment of the current read address pointer, judging that the current write-in quantity of the internal data of the transit cache module is less than the read-out quantity, and jumping to S64; otherwise, waiting;
s64: the output register module reads quantitative data from the transfer cache module according to a data reading threshold value;
s65: and the output register module outputs the read data to the industrial personal computer.
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Effective date of registration: 20221209 Address after: Room 62327, Building 3, No. 1800, Panyuan Road, Changxing Town, Chongming District, Shanghai 200085 (Taihe Economic Development Zone, Shanghai) Patentee after: Shanghai Qinchang Photoelectric Technology Co.,Ltd. Address before: 518000 1 1, Wutong Road, Yantian District, Shenzhen, Guangdong Patentee before: Li Jiangai |