Automatic monitoring system and analysis method for high concurrent voltage of deformable mirror actuator

Abstract

To address the problems of spatiotemporal asynchrony and difficulty in guaranteeing the accuracy of voltage stability analysis in existing voltage monitoring methods, this invention discloses an automatic monitoring system and method for high-concurrency voltage of deformable mirror actuators. The monitoring system includes an interface conversion module, a data acquisition module, and a power supply module. The interface conversion module includes at least two serial port servers connected to a host computer, each with M conversion interfaces. The data acquisition module includes multiple data acquisition units, each with N data acquisition cards. Each data acquisition card has P data acquisition channels. The power supply module includes Q power supplies. The data acquisition cards are divided into Q-1 groups, with each card in each group connected to one of the Q-1 power supplies. The remaining power supply is connected to both the host computer and the serial port servers. This monitoring system can achieve high-precision, second-level full-range monitoring and multi-dimensional performance evaluation of high-concurrency voltage of deformable mirror actuators.

Description

Technical Field

[0001] This invention relates to a high-concurrency voltage monitoring system and method, specifically to an automatic monitoring system and monitoring and analysis method for high-concurrency voltage of the deformable mirror actuator of a coronagraph. Background Technology

[0002] In cutting-edge space astronomy missions such as exoplanet detection, the coronagraph is a core scientific instrument for suppressing the bright light of stars and directly capturing faint planetary signals. Due to the effects of manufacturing residues of optical components, assembly stress, and thermal deformation, the coronagraph inevitably produces wavefront phase and amplitude distortions. These distortions create speckles on the imaging plane that are completely overwhelmed by planetary signals that are several orders of magnitude fainter than stars.

[0003] To eliminate speckle, wavefront correction techniques are typically used to compensate for phase errors in coronagraphs in real time. The deformable mirror (DM), as the core actuator of this wavefront correction technique, integrates thousands of actuators that undergo micrometer-level deformation under precise voltage, thereby actively canceling aberrations in the optical path. The direct physical result of this correction process is the elimination of speckle noise within the scientific observation area of ​​the coronagraph's imaging plane, creating an extremely dark, low-noise dark hole. Therefore, the contrast of the dark hole (e.g., 10⁻⁶) is significantly improved. -8 (or higher) depends directly on the accuracy of wavefront corrections, which provide a clean scientific background for the detection of exoplanets.

[0004] To achieve precise control over dark areas, existing deformable mirrors commonly employ actuator arrays with 952 channels or higher spatial resolution. To obtain sufficient wavefront correction stroke, actuators typically require a drive voltage of 0-300V or higher; simultaneously, nearly a thousand high-voltage signals are highly integrated into extremely small electrical connectors with minute contact spacing, creating an extremely complex electrical environment (currently, a single connector in the system has 528 contacts). Therefore, during ground calibration and acceptance phases, deformable mirror actuators typically require real-time, full-range, precise monitoring of their output voltage.

[0005] The most common monitoring method currently used is manual inspection, which can monitor voltage to a certain extent, but it also has significant limitations.

[0006] (1) Spatiotemporal asynchrony of measurement data: The traditional manual inspection method is essentially a "time-serial" acquisition. During the wavefront calibration of the coronameter, there is a coupling effect between the actuators, and the manual inspection method cannot obtain the voltage status of 952 high-voltage signals under the same time reference. In addition, since the test cycle of the manual inspection method is long (usually several hours), when measuring the first and last channels, the electronic components inside the drive box may generate thermal drift due to the increased working time. This temperature drift that changes over time will be mixed into the measurement data, making it impossible to distinguish whether the final analysis result is due to poor consistency between channels or temperature drift generated by the system over time, thus misleading the calibration of the control algorithm.

[0007] (2) Signal Integrity Challenges under High-Density Connectors: To achieve high integration, the output of the waveform correction box uses extremely dense connectors. Frequent physical plugging and unplugging measurements using manual probes or adapters can easily cause pin wear, bending, or coating peeling, leading to increased contact resistance and introducing measurement noise. In addition, since the drive signal is a high-voltage signal, long-distance temporary adapter cables are prone to electromagnetic induction effects during manual wiring tests. In the absence of shielding and fixed cable trays, electromagnetic crosstalk between adjacent high-voltage channels can significantly reduce the accuracy of voltage stability analysis.

[0008] (3) Lack and limitations of statistical evaluation indicators: Manual recording can only obtain discrete static voltage points, making it difficult to calculate and display key indicators reflecting the performance of deformable mirrors in real time, such as linearity, median deviation, and the consistency distribution of positive and negative deviations. At the same time, traditional manual inspection methods cannot achieve real-time automatic subtraction of the system's static background. Due to the inherent background noise in the high-voltage acquisition environment and the lack of automated background calibration technology, the measurement results contain a large number of system bias errors, which cannot meet the requirements of sub-nanometer wavefront correction for millivolt-level voltage accuracy.

[0009] (4) Failure of complex closed-loop algorithm verification: The dark area control of the coronagraph depends on the "real-time closed loop" of the deformable mirror and its control algorithm. Manual testing can only perform "static open-loop" verification and does not have the ability to acquire data concurrently across the entire range. Therefore, it is impossible to simulate the hardware response characteristics of the algorithm under high-speed adjustment during the ground inspection stage, resulting in a disconnect between the ground inspection results and the actual performance after orbit insertion. Summary of the Invention

[0010] The purpose of this invention is to solve the technical problems of traditional manual inspection methods, such as the spatiotemporal asynchrony of measurement data, difficulty in ensuring the accuracy of voltage stability analysis, lack of statistical evaluation indicators, and failure of verification of complex closed-loop algorithms. The invention provides a high-concurrency voltage automatic monitoring system and monitoring and analysis method for deformable mirror actuators.

[0011] To achieve the above objectives, the technical solution provided by this invention is as follows: A high-concurrency voltage automatic monitoring system for deformable mirror actuators, characterized by: Includes an interface conversion module, a data acquisition module, and a power supply module; The interface conversion module includes at least two serial port servers connected to the host computer, and each serial port server is provided with M conversion interfaces, where 4≤M≤16; The acquisition module includes multiple acquisition units corresponding to each conversion interface. Each acquisition unit includes N acquisition cards, where N≤8. Each acquisition card has P acquisition channels, where P≥8. One end of each acquisition channel is connected to the corresponding conversion interface, and the other end is used to connect to a deformable mirror actuator to acquire the real high-concurrency voltage output by the corresponding deformable mirror actuator. 2×M×N×P≥ the total number of deformable mirror actuators. The power module includes Q power supplies, where Q≤8; the acquisition cards are divided into Q-1 groups, with each acquisition card in each group connected to one of the Q-1 power supplies, and the remaining power supply connected to the host computer and the serial port server respectively.

[0012] Furthermore, it also includes a port conversion module; the port conversion module includes multiple acquisition ports corresponding one-to-one with multiple acquisition channels; each acquisition port is connected to one acquisition channel and a corresponding deformable mirror actuator at both ends, and the connection end between the acquisition port and the corresponding acquisition channel is provided with a connector of the same model as the deformable mirror.

[0013] Furthermore, the serial server is connected to the host computer via a switch, which is a TP-Link SG1005 industrial-grade five-port gigabit switch.

[0014] Furthermore, each of the acquisition cards supports 0~500V DC voltage acquisition, and the negative terminal of each acquisition card is short-circuited; the voltages of the P acquisition channels corresponding to each acquisition card are mutually isolated, and the acquisition rate of each acquisition channel reaches 10KHz.

[0015] Furthermore, each conversion interface is an independent RS485 interface, and polls the corresponding acquisition card via TCP / IP protocol; Alternatively, each conversion interface can be a PCI interface.

[0016] Furthermore, it also includes a chassis, which is a frame structure, with the host computer, interface conversion module, acquisition module and power module respectively installed inside the frame structure; the chassis is provided with multiple cable routing channels and the bottom of the chassis is equipped with casters.

[0017] Furthermore, it also includes a chassis, which is a box structure, and the host computer, interface conversion module, acquisition module and power supply module are respectively integrated inside the box structure.

[0018] Furthermore, the M=8 not only satisfies the requirement of synchronous acquisition of voltage status of the existing 952-channel actuator array of deformable mirrors, but also reserves hardware expansion space for future larger-scale deformable mirrors (such as the 1024-actuator level).

[0019] Meanwhile, the present invention also provides an automatic monitoring and analysis method for high concurrent voltage of deformable mirror actuators, which is characterized by including the following steps: Step 1: Determine the number of acquisition channels based on the number of deformable mirror actuators, and assemble the high-concurrency voltage automatic monitoring system for the deformable mirror actuators. Step 2: Synchronously collect background data of each deformable mirror actuator after it has been started and stabilized through each acquisition channel in the acquisition module, and transmit it to the host computer via the corresponding serial port server; the background data refers to the actual high-concurrency voltage output by the deformable mirror actuator when the voltage is set to 0V. Step 3: Synchronously acquire the actual high-concurrency voltage output by each deformable mirror actuator under different operating voltages through each acquisition channel in the acquisition module, and transmit it to the host computer via the corresponding serial port server; Step 4: Subtract the background data corresponding to the actual high-concurrency voltage transmitted in Step 3 from the data transmitted by the host computer to obtain the data to be analyzed; Step 5: Based on the data to be analyzed, evaluate the stability, linearity and consistency of the driving voltage of the deformable mirror actuator, thereby realizing automatic monitoring and evaluation of high-concurrency voltage of the deformable mirror actuator.

[0020] Furthermore, in step 5, stability assessment refers to processing the data to be analyzed corresponding to each acquisition channel within a preset sampling period, and extracting the maximum, minimum, average and median values ​​of voltage fluctuations, thereby assessing the ripple characteristics and fluctuation range stability of the driving voltage of the deformable mirror actuator. Linearity evaluation refers to performing linear fitting on the data to be analyzed corresponding to each acquisition channel within a preset operating voltage range to obtain a response line, and extracting the linearity and deviation index of the actual high-concurrency voltage relative to the response line, thereby evaluating the predictability of the response of each deformable mirror actuator. Consistency assessment refers to evaluating the consistency of the data to be analyzed by a single acquisition channel at different times under the same operating voltage, as well as the consistency of the data to be analyzed by all acquisition channels at the same time under the same operating voltage.

[0021] The beneficial effects of this invention are as follows: 1. In the high-concurrency voltage automatic monitoring system for deformable mirror actuators provided by this invention, the interface conversion module includes at least two serial port servers connected to a host computer. Each serial port server has M conversion interfaces, each conversion interface corresponds to a data acquisition unit, each data acquisition unit includes N data acquisition cards, and each data acquisition card has P data acquisition channels. Simultaneously, the power supply module provides separate power to the data acquisition cards and communication equipment (host computer and serial port servers). This invention employs a distributed voltage acquisition matrix design, multi-level communication link topology, grouped load balancing power supply, high-density signal interconnection and interface integration, and modular mechanical support structure. This overcomes the limitation of traditional serial testing systems where the sampling period linearly increases with the number of channels, enabling second-level full-range high-precision monitoring and multi-dimensional performance evaluation of the high-voltage signal of the deformable mirror actuator.

[0022] 2. The high-concurrency voltage automatic monitoring system for deformable mirror actuators provided by the present invention also includes a port conversion module. The port conversion module includes multiple acquisition ports corresponding to the acquisition channels, which can ensure full coverage and electrical isolation of the full channel signals, and greatly reduce the complexity of physical connections and safety hazards.

[0023] 3. In the high-concurrency voltage automatic monitoring system for deformable mirror actuators provided by the present invention, a connector of the same model as the deformable mirror is provided at the connection end between the acquisition port and the corresponding acquisition channel. This eliminates the cumbersome process of frequently changing adapter cables in traditional testing methods, which not only greatly improves testing efficiency, but also eliminates the signal loss and impedance mismatch problems caused by large-scale cable conversion.

[0024] 4. In the high-concurrency voltage automatic monitoring system for the deformable mirror actuator provided by the present invention, the serial port server and the host computer are connected through a switch, which enables high-speed Modbus TCP data interaction between the host computer and the hardware array.

[0025] 5. In the high-concurrency voltage automatic monitoring system for deformable mirror actuators provided by this invention, each acquisition card supports 0~500V DC voltage acquisition, and the negative terminal of each acquisition card is short-circuited to ensure the uniformity of the reference potential; at the same time, the acquisition rate of a single acquisition channel reaches 10KHz, and the voltages of each acquisition channel corresponding to each acquisition card are mutually isolated. When all channels are used together, the acquisition rate of a single channel can still reach 10KHz, thereby improving the overall acquisition efficiency and acquisition accuracy.

[0026] 6. In the high-concurrency voltage automatic monitoring system for deformable mirror actuators provided by the present invention, each conversion interface can adopt an independent RS485 interface and poll the corresponding acquisition card through the TCP / IP protocol. This type of interface has an ultra-long transmission distance and extremely strong anti-interference.

[0027] 7. In the high-concurrency voltage automatic monitoring system for deformable mirror actuators provided by the present invention, each conversion interface can also adopt a PCI interface, which can ensure that the voltage response data of all driving points have strict time reference consistency when performing dynamic characteristic tests on the coronagraph wave aberration correction box, support the accurate capture of complex transient processes, and further improve the acquisition rate.

[0028] 8. In the high-concurrency voltage automatic monitoring system for deformable mirror actuators provided by the present invention, the chassis can adopt a frame structure, and the host computer, interface conversion module, acquisition module and power supply module are installed on the frame structure. At the same time, multiple wiring channels are provided, which realizes excellent anti-interference ability and heat dissipation performance under high-density arrangement.

[0029] 9. In the high-concurrency voltage automatic monitoring system for deformable mirror actuators provided by the present invention, the chassis can also be a box structure, and the host computer, interface conversion module, acquisition module and power supply module are all integrated inside the box structure, thereby improving the spatial integration, sampling timeliness and electrical reliability.

[0030] 10. In the high-concurrency voltage automatic monitoring system for deformable mirror actuators provided by the present invention, the power supply of the communication equipment is completely isolated from the acquisition card to prevent data acquisition errors caused by transient surges in the communication link and to ensure that voltage fluctuations during high loads do not interfere with each other.

[0031] 11. The high-concurrency voltage automatic monitoring and analysis method for deformable mirror actuators provided by this invention adopts a dynamic background subtraction algorithm and a multi-dimensional evaluation mode. Through background subtraction, it effectively filters out the bias error caused by environmental thermal noise and connector contact resistance, thereby improving the measurement signal-to-noise ratio required for sub-nanometer wavefront correction. Through the multi-dimensional evaluation mode, it transforms the original voltage data into a metric reflecting the actuator performance, providing a highly reliable and high-precision digital support tool for ground calibration and real-time monitoring of complex adaptive optics systems. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the high-concurrency voltage automatic monitoring system embodiment of the deformable mirror actuator of the present invention (power module and chassis are not shown).

[0033] Figure 2 This is a schematic diagram of the power module in an embodiment of the high-concurrency voltage automatic monitoring system for the deformable mirror actuator of the present invention.

[0034] Figure 3 This is a schematic diagram of the chassis structure in an embodiment of the high-concurrency voltage automatic monitoring system for the deformable mirror actuator of the present invention.

[0035] Figure 4This is a diagram showing the data to be analyzed obtained in step 4 of the embodiment of the automatic monitoring and analysis method for high concurrent voltage of deformable mirror actuator of the present invention.

[0036] Figure 5 This is an interface display diagram of the stability assessment in step 5 of the embodiment of the automatic monitoring and analysis method for high concurrent voltage of deformable mirror actuator of the present invention.

[0037] Figure 6 This is an interface display diagram of the linearity evaluation in step 5 of the embodiment of the automatic monitoring and analysis method for high concurrent voltage of deformable mirror actuator of the present invention.

[0038] Figure 7 This is an interface display diagram of the consistency evaluation in step 5 of the embodiment of the automatic monitoring and analysis method for high concurrent voltage of deformable mirror actuator of the present invention.

[0039] The annotations in the attached figures are explained as follows: 1-Chassis, 2-Cable tray, 3-Pulley, 4-Port adapter module. Detailed Implementation

[0040] To make the objectives, advantages, and features of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0041] This embodiment provides a high-concurrency voltage automatic monitoring system for deformable mirror actuators. It is a distributed automatic testing scheme with hardware and software collaboration. It adopts a distributed voltage acquisition matrix design, a multi-level communication link topology, a group load balancing power supply system, high-density signal interconnection and interface integration, and a modular mechanical support structure. It can realize second-level full-range monitoring and multi-dimensional performance evaluation of 952 channels of high-voltage signals of deformable mirror actuators.

[0042] Combination Figure 1 and Figure 2 As shown, the high-concurrency voltage automatic monitoring system for the deformable mirror actuator includes a chassis 1 ( Figure 1 (not shown in the diagram), and the host computer, interface conversion module, acquisition module and power supply module installed in the chassis 1.

[0043] The chassis 1 described in this embodiment can be a frame structure. Figure 3 As shown), the main frame structure adopts 30 The frame is constructed from 30mm industrial aluminum. The host computer, interface conversion module, acquisition module, and power module are mounted on the frame-type mounting rails, arranged in a three-sided surround layout. This design minimizes the physical volume while maximizing the heat dissipation area and wiring space, achieving excellent anti-interference capability and heat dissipation performance under high-density arrangement.

[0044] Meanwhile, multiple cable trays 2 are provided on the chassis 1 to facilitate the classification and fixing of cables (power cables, communication cables, and signal cables, etc.) corresponding to different modules, thereby reducing electromagnetic interference between cables. In addition, lockable casters 3 are installed at the bottom of the chassis 1 to meet the mobility needs of the laboratory and field inspection sites.

[0045] Alternatively, to improve the integration of the monitoring system, chassis 1 can also be a cabinet structure (e.g., 8U in height), integrating the host computer, interface conversion module, acquisition module, and power supply module inside the cabinet structure. Corresponding interfaces and heat dissipation devices are provided on the cabinet of chassis 1. This structure can integrate nearly a thousand acquisition channels into a single chassis 1, achieving a leap from "multi-node distributed acquisition" to "single-node highly integrated acquisition," and has the following advantages: (1) Improved spatial integration: The volume has been reduced from a distributed frame to an 8U compact chassis, while also being easy to carry in the field and install on a rack.

[0046] (2) Improved sampling timeliness: The sampling period is shortened from seconds to milliseconds (10KHz) to meet the needs of dynamic characteristic analysis.

[0047] (3) Enhanced electrical reliability: The modular plug-in design and customized backplane significantly reduce the number of connectors and lower the mean time between failures (MTBF).

[0048] The interface conversion module in this embodiment includes two NCOM580G serial port servers, each with eight conversion interfaces (a total of 16 conversion interfaces). Each serial port server is connected to the host computer via a switch, which is a TP-Link SG1005 industrial-grade five-port gigabit switch. This switch aggregates the data traffic from the serial port servers to the local area network, enabling high-speed Modbus TCP data interaction between the host computer and the hardware array.

[0049] The software loaded in the host computer can perform millisecond-level heartbeat monitoring on 1024 channels. At the same time, on its UI interface, a normally connected acquisition card is displayed as a green light, while an acquisition card with communication or reading abnormalities will automatically switch to a red alarm state, realizing intuitive management of large-scale arrays.

[0050] Each conversion interface can use an independent RS485 interface and poll the corresponding acquisition card via TCP / IP protocol. This type of interface has an ultra-long transmission distance and extremely strong anti-interference capability.

[0051] Alternatively, each conversion interface can also use a PCI interface (parallel local bus interface), which ensures that the voltage response data of all drive points have strict time reference consistency when performing dynamic characteristic tests on the coronagraph aberration correction box, supporting the accurate capture of complex transient processes.

[0052] The acquisition module comprises 16 acquisition units, each corresponding to one of the 16 conversion interfaces. Each acquisition unit includes 8 acquisition cards; each acquisition card has 8 acquisition channels. One end of each acquisition channel connects to the corresponding conversion interface, and the other end connects to a deformable mirror actuator to acquire the actual high-concurrency voltage output of the corresponding deformable mirror actuator. The overall system design supports concurrent access of up to 128 acquisition cards (corresponding to 1024 acquisition channels), reserving hardware expansion space for future larger-scale deformable mirrors (such as those with 1024 actuators).

[0053] In this embodiment, the data acquisition card can be the ZH-44084-14M2 data acquisition device from Shenzhen Zhongchuang Zhihe Technology Co., Ltd. Each acquisition card supports 0~500V DC voltage acquisition, and the negative terminal of each acquisition card is shorted to ensure the uniformity of the reference potential. Furthermore, an FPGA logic control engine can be introduced at the bottom layer of the acquisition card, with a built-in 16K-point large-capacity shared FIFO buffer to support hardware-level analog triggering and digital signal synchronous triggering modes. When a target voltage fluctuation is detected, the FPGA can instantly start high-speed recording across all channels and efficiently upload the massive data stream to the host computer via the network port, solving the problems of packet loss and latency under high-concurrency data streams.

[0054] Among the eight acquisition channels corresponding to each acquisition card, the acquisition rate of a single channel can reach up to 10KHz. In this embodiment, voltage isolation is also performed between two adjacent acquisition channels. Therefore, when all channels are used together, the acquisition rate of a single channel can still reach 10KHz, thereby improving the overall acquisition efficiency and acquisition accuracy.

[0055] The power module in this embodiment includes five I75-23B24R3 power supplies, each capable of converting 220V AC to 24V DC, and is centrally controlled and protected by an air switch. In actual assembly, all data acquisition cards are divided into four groups. Each group's data acquisition cards are connected to one of the four power supplies, with the remaining power supply connected to the host computer and the serial server. Specifically, groups 1, 2, and 3 each have 32 data acquisition cards, and group 4 has 23. These four groups are driven by their respective four power supplies, while the fifth power supply powers the host computer and the serial server. This configuration completely isolates the power supply of the communication equipment from the data acquisition cards, preventing data acquisition errors caused by transient surges in the communication link and ensuring that voltage fluctuations under high loads do not interfere with each other.

[0056] This embodiment also includes a port adapter module 4 installed on the chassis 1. The port adapter module 4 includes 1024 acquisition ports corresponding one-to-one with the 1024 acquisition channels. It uses 15 68-pin high-density connectors as the acquisition ports for the original signals. Every 8 acquisition cards (providing 64 signals and 4 system grounds) are physically mapped to 1 68-pin connector. The first 14 connectors are fully loaded with 64 signals, and the 15th connector connects the remaining 56 signals and reserves redundant pins, ensuring full coverage and electrical isolation of 952 high-voltage signals, and greatly reducing the complexity of physical connections and safety hazards.

[0057] Each acquisition port connects to one acquisition channel and a corresponding deformable mirror actuator at each end. The connection points between the acquisition port and the corresponding acquisition channel are equipped with high-density Meg-Array 528 connectors of the same model as the deformable mirror. This eliminates the cumbersome process of frequently changing adapter cables in traditional testing methods, significantly improving testing efficiency and eliminating signal loss and impedance mismatch issues caused by large-scale cable conversions. Furthermore, the Meg-Array 528 interface boasts excellent contact reliability and signal consistency, ensuring that the voltage data acquired by the host computer accurately reflects the actual driving voltage of the deformable mirror actuator. The port adapter module 4 is securely mounted on the top of the chassis 1 via a PCB expansion board, effectively resisting mechanical stress during testing and protecting the precision pins from damage.

[0058] Furthermore, this embodiment also provides an automatic monitoring and analysis method for high concurrent voltage of deformable mirror actuators, including the following steps: Step 1: Determine the number of acquisition channels based on the number of deformable mirror actuators, and assemble the high-concurrency voltage automatic monitoring system for the deformable mirror actuators described in this embodiment.

[0059] The software developed for the host computer runs on Windows 10 and employs a hybrid programming architecture of Node.js and C++. The host computer acts as the Master node, using the Modbus TCP protocol to communicate in full-duplex with the underlying hardware cluster via standard socket data packets. Additionally, the software integrates the xlsx library for generating complex reports and utilizes a high-performance socket parsing library to ensure real-time packet fragmentation.

[0060] For the 1024 channels (including 952 measured and redundant channels), the software employs multi-threading technology to establish and dynamically maintain 128 independent concurrent TCP connections. Each thread is independently responsible for data capture from an 8-channel acquisition card. Through asynchronous non-blocking I / O scheduling, the monitoring system successfully controlled the data backhaul, protocol parsing, and interface refresh cycle for the entire range (1024 channels) to within 1 second.

[0061] Step 2: The background data of each deformable mirror actuator after stabilization is synchronously acquired through each acquisition channel in the acquisition module, and transmitted to the host computer via the corresponding serial port server; the background data refers to the actual high-concurrency voltage output by the deformable mirror actuator when the voltage is set to 0V. In the absence of signal or ground input, the monitoring system cyclically acquires zero-point fluctuation data from 1024 channels at fixed intervals, calculates the average background value of each channel, and stores it in the host computer.

[0062] Step 3: Synchronously acquire the actual high-concurrency voltage output by each deformable mirror actuator under different operating voltages through each acquisition channel in the acquisition module, and transmit it to the host computer via the corresponding serial port server.

[0063] Step 4: Subtract the background data corresponding to the actual high-concurrency voltage transmitted in Step 3 from the data transmitted by the host computer to obtain the data to be analyzed. Figure 4 (As shown).

[0064] During the formal measurement process, the "background subtraction" mode can be enabled. Before the data is presented, the software loaded in the host computer subtracts the background mean value of the corresponding channel in memory (i.e., background data) from the real-time acquired value. This effectively filters out environmental thermal noise and bias errors caused by connector contact resistance, improving the measurement signal-to-noise ratio required for sub-nanometer wavefront correction. In addition, since the system voltage will fluctuate to some extent, the actuator voltage needs to be set to zero before each acquisition, and background data needs to be acquired every 10 minutes.

[0065] Step 5: Based on the data to be analyzed, evaluate the stability, linearity and consistency of the driving voltage of the deformable mirror actuator, thereby realizing automatic monitoring and evaluation of high-concurrency voltage of the deformable mirror actuator.

[0066] In this embodiment, combined with Figure 5 As shown, stability assessment refers to processing the real high-concurrency voltage (data to be analyzed after deducting the corresponding background data) collected by each acquisition channel within a preset sampling period, and extracting the maximum, minimum, average and median values ​​of voltage fluctuations, thereby assessing the ripple characteristics and fluctuation range stability of the deformable mirror actuator driving voltage.

[0067] Input: The continuous voltage sampling sequence {V_1, V_2, ..., V_P} of the specified acquisition channel, and the user-defined sampling duration T.

[0068] The processing logic is as follows: 1. Extreme value extraction: Retrieve the maximum value (V_{max}) and minimum value (V_{min}) in the continuous voltage sampling sequence.

[0069] 2. Trend Calculation: Calculate the arithmetic mean (bar{V}) of the continuous voltage sampling sequence.

[0070] 3. Statistical distribution: The continuous voltage sampling sequence is sorted and the median (V_{mid}) is extracted to eliminate occasional pulse interference and truly reflect the static ripple of the driving voltage.

[0071] Output: Single-channel stability analysis report, used to determine whether the instantaneous fluctuation of the drive voltage meets the deformation control requirements.

[0072] Combination Figure 6 As shown, linearity evaluation refers to performing linear fitting on the actual high-concurrency voltage (data to be analyzed after deducting the corresponding background data) collected by each acquisition channel within the preset operating voltage range to obtain the response line, and extracting the linearity and deviation index of the actual high-concurrency voltage relative to the response line. This is used to evaluate the predictability of the response of each deformable mirror actuator, which is a key indicator to ensure the accurate deformation of the deformable mirror.

[0073] Input: Multiple preset voltage command test points (set values) and corresponding actual feedback acquisition value sequences.

[0074] Processing logic: 1. Data alignment: Match the voltage setpoint of each test point with the actual feedback acquisition value.

[0075] 2. Linear Fitting: A univariate linear regression analysis algorithm is used to fit the response line.

[0076] 3. Index Calculation: Calculate the maximum deviation of the actual measurement point relative to the response line, and extract the linearity and deviation indices.

[0077] Output: Single-channel linearity response curve and deviation analysis report, verifying the linear proportional relationship of the actuator stroke.

[0078] Combination Figure 7 As shown, consistency evaluation refers to assessing the consistency of the actual high-concurrency voltages (data to be analyzed after deducting corresponding background data) acquired by a single acquisition channel at different times under the same operating voltage, as well as the consistency of the actual high-concurrency voltages (data to be analyzed after deducting corresponding background data) acquired by all acquisition channels at the same time under the same operating voltage. The consistency index directly determines the contrast quality of the "dark area" generated by the coronagraph and is used to analyze the distribution of the entire array channels relative to the preset command value.

[0079] Input: Synchronous acquisition data of the entire array channels (952 channels / 1024 channels) under preset command values.

[0080] Processing logic: 1. Reference Differential: Perform real-time differential calculation between the actual acquired values ​​of each acquisition channel and a unified preset command value to obtain the deviation value of each channel.

[0081] 2. Deviation Statistics: Calculate the positive deviation or negative deviation of each acquisition channel relative to the preset instruction value.

[0082] 3. Distribution characteristics evaluation: Based on the deviation statistics, calculate the median distribution and range of the deviation statistics of the entire array to evaluate the dispersion between channels.

[0083] Output: Full array channel consistency distribution report, identifying and locating actuators with abnormal responses.

[0084] This embodiment achieves second-level synchronous capture of 1024 channels (including 952 measured channels) of driving voltage by constructing a distributed multi-threaded concurrent underlying architecture. Its core value lies not only in efficient data acquisition, but also in transforming the raw voltage data into quantitative indicators reflecting the performance of deformable mirror actuators through dynamic background subtraction algorithms and multi-dimensional evaluation modes. This provides a highly reliable and high-precision digital support tool for the ground calibration and real-time monitoring of complex adaptive optics systems.

[0085] In addition, the software of the host computer in this embodiment also has an automated report generation function. All collected raw data, stability, linearity and consistency analysis reports can be exported to standard Excel (xlsx) format with one click, and the save path can be freely defined.

[0086] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein, and such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present invention.

Claims

1. A method for automatic monitoring and analysis of high concurrent voltage in a deformable mirror actuator, characterized in that, Includes the following steps: Step 1: Determine the number of acquisition channels based on the number of deformable mirror actuators, and assemble the high-concurrency voltage automatic monitoring system for the deformable mirror actuators; Step 2: Synchronously collect background data of each deformable mirror actuator after it has been started and stabilized through each acquisition channel in the acquisition module, and transmit it to the host computer via the corresponding serial port server; the background data refers to the actual high-concurrency voltage output by the deformable mirror actuator when the voltage is set to 0V. Step 3: Synchronously acquire the actual high-concurrency voltage output by each deformable mirror actuator under different operating voltages through each acquisition channel in the acquisition module, and transmit it to the host computer via the corresponding serial port server; Step 4: Subtract the background data corresponding to the actual high-concurrency voltage transmitted in Step 3 from the data transmitted by the host computer to obtain the data to be analyzed; Step 5: Based on the data to be analyzed, evaluate the stability, linearity and consistency of the driving voltage of the deformable mirror actuator, thereby realizing automatic monitoring and evaluation of high-concurrency voltage of the deformable mirror actuator. Among them, stability assessment refers to processing the data to be analyzed corresponding to each acquisition channel within a preset sampling period, and extracting the maximum, minimum, average and median values ​​of voltage fluctuations, so as to assess the ripple characteristics and fluctuation range stability of the driving voltage of the deformable mirror actuator. Linearity evaluation refers to performing linear fitting on the data to be analyzed corresponding to each acquisition channel within a preset operating voltage range to obtain a response line, and extracting the linearity and deviation index of the actual high-concurrency voltage relative to the response line, thereby evaluating the predictability of the response of each deformable mirror actuator. Consistency assessment refers to evaluating the consistency of the data to be analyzed corresponding to a single acquisition channel at different times under the same operating voltage, as well as the consistency of the data to be analyzed corresponding to all acquisition channels at the same time under the same operating voltage.

2. A high-concurrency voltage automatic monitoring system for a deformable mirror actuator, used to implement the high-concurrency voltage automatic monitoring and analysis method for the deformable mirror actuator as described in claim 1, characterized in that: It includes a host computer, an interface conversion module, a data acquisition module, and a power supply module; The interface conversion module includes at least two serial port servers connected to the host computer, and each serial port server is provided with M conversion interfaces, where 4≤M≤16; The acquisition module includes multiple acquisition units corresponding to each conversion interface. Each acquisition unit includes N acquisition cards, where N≤8. Each acquisition card has P acquisition channels, where P≥8. One end of each acquisition channel is connected to the corresponding conversion interface, and the other end is used to connect to a deformable mirror actuator to acquire the real high-concurrency voltage output by the corresponding deformable mirror actuator. 2×M×N×P≥ the total number of deformable mirror actuators. The power module includes Q power supplies, where Q≤8; the acquisition cards are divided into Q-1 groups, with each acquisition card in each group connected to one of the Q-1 power supplies, and the remaining power supply connected to the host computer and the serial port server respectively.

3. The high-concurrency voltage automatic monitoring system for the deformable mirror actuator according to claim 2, characterized in that: It also includes a port adapter module (4); the port adapter module (4) includes multiple acquisition ports corresponding to multiple acquisition channels; each acquisition port is connected to one acquisition channel and one corresponding deformable mirror actuator at both ends, and the connection end of the acquisition port and the corresponding acquisition channel is provided with a connector of the same model as the deformable mirror.

4. The high-concurrency voltage automatic monitoring system for the deformable mirror actuator according to claim 2, characterized in that: The serial server is connected to the host computer via a switch, which is a TP-Link SG1005 industrial-grade five-port gigabit switch.

5. The high-concurrency voltage automatic monitoring system for the deformable mirror actuator according to claim 2, characterized in that: Each of the aforementioned acquisition cards supports 0~500V DC voltage acquisition, and the negative terminal of each acquisition card is short-circuited; the voltages of the P acquisition channels corresponding to each acquisition card are mutually isolated, and the acquisition rate of each acquisition channel reaches 10KHz.

6. The high-concurrency voltage automatic monitoring system for the deformable mirror actuator according to any one of claims 2 to 5, characterized in that: Each conversion interface is an independent RS485 interface, and polls the corresponding acquisition card via TCP / IP protocol; Alternatively, each conversion interface can be a PCI interface.

7. The high-concurrency voltage automatic monitoring system for the deformable mirror actuator according to claim 2, characterized in that: It also includes a chassis (1), which is a frame structure. The host computer, interface conversion module, acquisition module and power supply module are respectively installed inside the frame structure. The chassis (1) is provided with multiple cable trays (2) and pulleys (3) are installed at the bottom of the chassis (1).

8. The high-concurrency voltage automatic monitoring system for the deformable mirror actuator according to claim 2, characterized in that: It also includes a chassis (1), which is a box structure, and the host computer, interface conversion module, acquisition module and power supply module are integrated inside the box structure.

9. The high-concurrency voltage automatic monitoring system for the deformable mirror actuator according to claim 2, characterized in that: M=8.

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