Multi-channel micro-current signal synchronous acquisition system and acquisition method

Abstract

The invention relates to a multichannel micro-current signal synchronous acquisition system and an acquisition method, and belongs to a precision measurement technology in the technical field of electronic information. The system comprises a signal conversion and amplification module, a data acquisition module and a data processing module. And the signal conversion and amplification module is used for converting the weak current signal generated by the photoelectric detector into a voltage signal and amplifying the voltage signal. The data acquisition module comprises a plurality of synchronous acquisition channels and a reference source, and is used for carrying out parallel acquisition on the multi-channel amplified voltage signals and uploading the multi-channel amplified voltage signals to the data processing module. The data processing module has an automatic calibration function, and can calibrate the system before acquisition, so as to ensure the precision and consistency of data acquisition. Through multi-channel synchronous processing, weak current signals of the photoelectric detector array can be acquired in parallel in real time, the acquisition precision, the resolution and the number of channels are improved, the high-precision and high-flux photoelectric detection application requirements are met, and the reliability and the accuracy of data are ensured in a complex environment.

Description

Technical Field

[0001] The present invention relates to a precision electronic measurement technology in the field of electronic circuit technology, and in particular to a multi-channel micro-current signal synchronous acquisition system and acquisition method for a photoelectric detector array. Background Art

[0002] With the rapid development of photoelectric detection technology, the application demand of photodetector arrays in scientific research, industrial detection, medical imaging and other fields is increasing, and the requirement for high-precision, multi-channel data acquisition has gradually become an important basis for these applications. However, current signal acquisition systems usually rely on independent signal conversion and amplification modules to convert weak photocurrent signals into easy-to-process voltage signals and record data through acquisition modules. Such solutions have significant limitations, especially in applications with high channel counts and high-precision synchronous acquisition. The problems of low system integration, complex hardware connections and poor anti-interference ability are particularly obvious.

[0003] Most existing multi-channel acquisition systems adopt an independent modular design, where the signal conversion and amplification module is separated from the multi-channel acquisition module. This design not only increases the complexity of hardware wiring, but also causes the signal transmission path to be too long, which easily introduces signal loss and noise interference, limiting the measurement accuracy and anti-interference performance of the system. In addition, the existing technology lacks effective synchronous acquisition control and automatic calibration functions, making it difficult to achieve high-precision real-time data synchronization in a multi-channel environment, resulting in limited accuracy and stability of signal acquisition. In the case of unstable environmental conditions or changing application scenarios, the system often finds it difficult to maintain data accuracy and consistency, which limits the expansion of application scenarios.

[0004] Therefore, the existing multi-channel microcurrent acquisition system has great deficiencies in terms of system integration, noise resistance, real-time performance and automatic calibration capability. There is an urgent need for a technical solution that can be highly integrated and improve the accuracy and stability of multi-channel data acquisition to meet the data acquisition needs in high-throughput and complex environments. Summary of the invention

[0005] In view of this, the present invention proposes a multi-channel micro-current signal synchronous acquisition system for a photodetector array. Aiming at the problem that multi-channel acquisition is difficult to achieve high-precision synchronization in the prior art, the accuracy and efficiency of data acquisition are significantly improved through a highly integrated system design. This system can not only achieve accurate signal synchronization in multi-channel acquisition, but also simplify the hardware structure, thereby reducing the overall cost and meeting the application requirements of high-throughput and high-precision photodetection.

[0006] To achieve the above-mentioned object, the present invention provides a multi-channel micro-current signal synchronous acquisition system for a photoelectric detector array, comprising a signal conversion and amplification module, a data acquisition module and a data processing module;

[0007] The signal conversion and amplification module includes a plurality of signal conversion amplifiers, which correspond to and are connected to the photodetectors one by one, and are used to receive the weak current signal generated by the photodetectors, convert it into a voltage signal and amplify it;

[0008] The data acquisition module includes a reference source and multiple synchronous acquisition channels, which are used to collect multi-channel amplified voltage signals from the signal conversion and amplification module in parallel, realize multi-channel synchronous acquisition, and ensure the time consistency and data accuracy of the signal through the reference source; the synchronous acquisition channels correspond to and are connected to the signal conversion amplifiers one by one, and the synchronous acquisition channels collect data from the corresponding signal conversion amplifiers, and upload the collected data to the data processing module through a unified TCP / IP interface or serial port interface;

[0009] The data processing module integrates the host computer and the data repository, wherein the host computer system performs denoising and smoothing on the received multi-channel data, and performs error compensation on the data according to the calibration parameters to ensure the consistency and accuracy of the data. The processed data is stored in the local data repository and backed up to the cloud database to prevent data loss and support remote access. The host computer system can also perform in-depth analysis on the stored data, generate charts and reports, and display the results of data collection in real time.

[0010] Furthermore, the current signal detection range of the signal amplification module includes picoampere level, nanoampere level and microampere level.

[0011] Furthermore, the multiple synchronous acquisition channels in the data acquisition module are synchronously controlled through a reference source, and the reference source can provide a synchronization signal with millisecond-level accuracy, thereby ensuring the real-time and synchronization of multi-channel data acquisition to meet the application requirements of high-precision photoelectric detection.

[0012] Furthermore, the data processing module also has an automatic calibration function, which can automatically perform calibration operations before each data acquisition. By calibrating the reference signal source and the gain coefficient of the acquisition channel, a comprehensive calibration of the acquisition system is achieved to improve the accuracy and consistency of data acquisition.

[0013] A method for collecting multi-channel micro-current signal synchronous collection system is implemented by the multi-channel micro-current signal synchronous collection system for photoelectric detector array. The specific process is as follows:

[0014] Step 1, start the system, the data processing module and the data acquisition module enter the standby state, and then perform a system self-check. The data processing module initializes the data acquisition module and completes the system configuration by setting the hardware parameters and software parameters of the acquisition port;

[0015] Step 2: If the self-test is completed, proceed to step 3; if the self-test is not completed, wait for the self-test again;

[0016] Step 3: After the self-check is completed, the system enters the parameter calibration process in the initial state;

[0017] Step 4: When the system receives the acquisition instruction, the data processing module sets all acquisition channels to synchronous mode, starts parallel acquisition of the data acquisition module, and transmits the collected real-time data to the data processing module via TCP / IP or serial port interface;

[0018] Step 5: The data processing module performs preprocessing operations on the received collected data, including denoising and smoothing. At the same time, the system performs error compensation on the data of each channel according to the previously set calibration parameters. The data is then stored in the local data repository and backed up to the cloud database.

[0019] Step 6: After the data is stored, the data processing module further analyzes the data and generates corresponding charts and reports;

[0020] Step 7, when the acquisition task is completed, the data processing module sends a stop acquisition instruction to the data acquisition module; the data acquisition module disconnects the acquisition task of each channel in turn, and puts the system back into standby mode to prepare for the next acquisition task.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) High-precision synchronous acquisition: The multi-channel synchronous acquisition design ensures the high accuracy and real-time performance of weak current signals, meeting the high-throughput and high-resolution requirements of multi-channel data in photoelectric detection applications.

[0023] (2) System automatic calibration: The system's automatic calibration function can perform baseline calibration on each channel before acquisition, compensate for errors between channels, ensure high accuracy and consistency of data acquisition, and improve the stability of the system in complex environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention.

[0025] In the figure, 1 is a photodetector array, 2 is a signal conversion and amplification module, 3 is a data acquisition module, and 4 is a data processing module.

[0026] Figure 2 It is a work flow chart of the present invention. DETAILED DESCRIPTION

[0027] In order to make the objectives, technical solutions and advantages of the embodiments of the present disclosure more clear, the illustrative implementation methods and descriptions of the embodiments of the present disclosure are only used to explain the embodiments of the present disclosure and are not intended to limit the embodiments of the present disclosure.

[0028] A multi-channel micro-current signal synchronous acquisition system for a photoelectric detector array, the system comprising: a signal conversion and amplification module, for receiving a weak current signal generated by a photoelectric detector, converting the weak current signal into a voltage signal, and amplifying the voltage signal with high precision; the amplification module can amplify weak current signals from picoamperes to nanoamperes with high precision to generate voltage signals that are easy to process; the detection range of the current signal includes picoamperes (pA), nanoamperes (nA) and microamperes (μA).

[0029] A data acquisition module, comprising a plurality of synchronous acquisition channels and a reference source, realizes multi-channel real-time synchronous acquisition through the synchronization signal provided by the reference source, and can collect the multi-channel amplified voltage signals from the signal conversion and amplification module in parallel, and upload the collected data to the data processing module through the TCP / IP interface or the serial port interface;

[0030] The data processing module is used to receive the collected data from the data acquisition module, integrates the host computer and cloud service functions, and has an automatic calibration function. The automatic calibration function can calibrate the system before data collection to ensure the accuracy and consistency of the collected data, so as to adapt to changes in different environmental conditions and maintain the stability of the collected data. The data processing module can not only process and display data in real time, but also support data storage and cloud upload, realizing cross-platform remote monitoring and management.

[0031] Furthermore, the signal conversion and amplification module includes a multi-stage amplification circuit, which can amplify weak current signals from picoamperes to nanoamperes with high precision to ensure that the signal-to-noise ratio of the output signal is suitable for subsequent data acquisition and processing.

[0032] Furthermore, the multiple synchronous acquisition channels in the data acquisition module are synchronously controlled through a shared reference source, and the reference source can provide a synchronization signal with millisecond-level accuracy, thereby ensuring the real-time and synchronization of multi-channel data acquisition to meet the application requirements of high-precision photoelectric detection.

[0033] Furthermore, the automatic calibration function of the data processing module can automatically perform calibration operations before each data acquisition. By calibrating the reference signal source and the gain coefficient of the acquisition channel, a comprehensive calibration of the acquisition system is achieved to eliminate the initial deviation between the channels, thereby improving the accuracy and consistency of data acquisition.

[0034] The following is a further detailed description of the embodiments of the present disclosure in conjunction with the embodiments and drawings.

[0035] Reference Figure 1 , this embodiment discloses a multi-channel micro-current signal synchronous acquisition system for a photodetector array, such as Figure 1 As shown, it includes a signal conversion and amplification module 2, a data acquisition module 3 and a data processing module 4. The system is used to synchronously acquire, amplify and process the weak current signal generated by the photodetector array 1, thereby realizing high-precision acquisition and analysis of the photodetector array signal.

[0036] The signal conversion and amplification module 2 includes a plurality of amplifiers, each of which is electrically connected to a photodetector in the photodetector array 1. The signal conversion and amplification module 2 is used to receive the weak current signal generated by the photodetector array 1 and convert it into an analog voltage signal for subsequent processing. The amplified voltage signal is transmitted from the output end of each amplifier to the corresponding acquisition channel of the data acquisition module 3.

[0037] The data acquisition module 3 includes multiple synchronous acquisition channels, each channel is connected to the corresponding amplifier output end in the signal conversion and amplification module 2, and is connected to the data processing module 4 through the TCP / IP interface 5 or the serial port interface 6 to realize the synchronous acquisition of the voltage signal of each channel, and upload the packaged multi-channel data to the data processing module 4.

[0038] The data processing module 4 includes a host computer system and a data repository. The host computer system performs denoising and smoothing on the received multi-channel data, and performs error compensation on the data according to the calibration parameters to ensure the consistency and accuracy of the data. The processed data is stored in the local data repository and backed up to the cloud database to prevent data loss and support remote access. The host computer system can also perform in-depth analysis on the stored data, generate charts and reports, and display the results of data collection in real time.

[0039] like Figure 2 As shown, the working method of a multi-channel micro-current signal synchronous acquisition system for a photoelectric detector array disclosed in the present invention comprises the following steps:

[0040] (1) System startup and standby state: After the system is started, the data processing module 4 and the data acquisition module 3 enter the standby state. The data processing module 4 initializes the data acquisition module 3 and completes the system configuration by setting the hardware parameters and software parameters of the acquisition port. The system self-check includes checking the hardware connection status, software status and communication status to ensure that all acquisition ports are connected normally. After confirmation, the system initializes the parameters of each acquisition channel and prepares for data acquisition.

[0041] (2) Parameter calibration: After the self-test is completed, the system enters the parameter calibration process in the initial state. At this time, each acquisition channel is set to a no-input state. The system collects the baseline data of the initial state and calibrates each channel based on these baseline data to eliminate the initial deviation between channels. After the calibration is completed, the system enters the standby mode and waits for the acquisition instruction.

[0042] (3) Synchronous data acquisition: When the system receives the acquisition instruction, the data processing module 4 sets all acquisition channels to the synchronous mode and starts the parallel acquisition of the data acquisition module 3. Each acquisition channel independently acquires microcurrent signals in the synchronous mode to ensure the timing consistency during the acquisition process. The collected real-time data is transmitted to the data processing module 4 via TCP / IP or serial port interface.

[0043] (4) Data preprocessing and calibration compensation: The data processing module 4 performs preprocessing operations on the received collected data, including denoising and smoothing. At the same time, the system performs error compensation on the data of each channel according to the previously set calibration parameters to ensure the consistency and accuracy of the data. The processed data is stored in the local data repository and backed up to the cloud database to facilitate remote access and prevent data loss.

[0044] (5) Data analysis and report generation: After data storage is completed, the data processing module 4 can further analyze the data and generate corresponding charts and reports. Users can view the data analysis results through the host computer or remote client. The system supports the generation of intuitive charts so that users can fully monitor the data collection situation.

[0045] (6) Ending the acquisition task: When the acquisition task is completed, the data processing module 4 sends a stop acquisition instruction to the data acquisition module 3. The data acquisition module 3 disconnects the acquisition tasks of each channel in turn and puts the system back into standby mode to prepare for the next acquisition task.

[0046] In summary, the present invention provides a multi-channel micro-current signal synchronous acquisition system for a photodetector array, which realizes high-precision synchronous acquisition and automatic calibration of multi-channel signals through a highly integrated design. The system has excellent synchronization performance and anti-interference ability, ensuring the accuracy and stability of weak current signal acquisition. Compared with the prior art, the present invention significantly simplifies the hardware structure, reduces signal loss and noise interference, and is particularly suitable for photoelectric detection applications that require high-precision, multi-channel data acquisition.

Claims

1. A multi-channel micro-current signal synchronous acquisition system for a photodetector array, characterized in that: It includes a signal conversion and amplification module, a data acquisition module and a data processing module; The signal conversion and amplification module includes a plurality of signal conversion amplifiers, which correspond to and are connected to the photodetectors one by one, and are used to receive the weak current signal generated by the photodetectors, convert it into a voltage signal and amplify it; The data acquisition module includes a reference source and multiple synchronous acquisition channels, which are used to collect multi-channel amplified voltage signals from the signal conversion and amplification module in parallel, realize multi-channel synchronous acquisition, and ensure the time consistency and data accuracy of the signal through the reference source; the synchronous acquisition channels correspond to and are connected to the signal conversion amplifiers one by one, and the synchronous acquisition channels collect data from the corresponding signal conversion amplifiers, and upload the collected data to the data processing module through a unified TCP / IP interface or serial port interface; The data processing module integrates the host computer and the data repository, wherein the host computer system performs denoising and smoothing on the received multi-channel data, and performs error compensation on the data according to the calibration parameters to ensure the consistency and accuracy of the data. The processed data is stored in the local data repository and backed up to the cloud database to prevent data loss and support remote access. The host computer system can also perform in-depth analysis on the stored data, generate charts and reports, and display the results of data collection in real time.

2. A multi-channel micro-current signal synchronous acquisition system for a photoelectric detector array according to claim 1, characterized in that: The current signal detection range of the signal amplification module includes picoampere level, nanoampere level and microampere level.

3. A multi-channel micro-current signal synchronous acquisition system for a photoelectric detector array according to claim 1, characterized in that: The multiple synchronous acquisition channels in the data acquisition module are synchronously controlled through a reference source, and the reference source can provide a synchronization signal with millisecond-level accuracy, thereby ensuring the real-time and synchronization of multi-channel data acquisition to meet the application requirements of high-precision photoelectric detection.

4. The multi-channel micro-current signal synchronous acquisition system for a photodetector array according to claim 1, characterized in that: The data processing module also has an automatic calibration function, which can automatically perform calibration operations before each data acquisition. By calibrating the reference signal source and the gain coefficient of the acquisition channel, a comprehensive calibration of the acquisition system is achieved to improve the accuracy and consistency of data acquisition.

5. A method for collecting multi-channel micro-current signal synchronous collection system, characterized in that: It is achieved by a multi-channel micro-current signal synchronous acquisition system for a photoelectric detector array as described in any one of claims 1 to 4, and the specific process is as follows: Step 1, start the system, the data processing module and the data acquisition module enter the standby state, and then perform a system self-check. The data processing module initializes the data acquisition module and completes the system configuration by setting the hardware parameters and software parameters of the acquisition port; Step 2: If the self-test is completed, proceed to step 3; if the self-test is not completed, wait for the self-test again; Step 3: After the self-check is completed, the system enters the parameter calibration process in the initial state; Step 4: When the system receives the acquisition instruction, the data processing module sets all acquisition channels to synchronous mode, starts parallel acquisition of the data acquisition module, and transmits the collected real-time data to the data processing module via TCP / IP or serial port interface; Step 5: The data processing module performs preprocessing operations on the received collected data, including denoising and smoothing. At the same time, the system performs error compensation on the data of each channel according to the previously set calibration parameters. The data is then stored in the local data repository and backed up to the cloud database. Step 6: After the data is stored, the data processing module further analyzes the data and generates corresponding charts and reports; Step 7, when the collection task is completed, the data processing module sends a stop collection instruction to the data collection module; The data acquisition module disconnects the acquisition tasks of each channel in turn and puts the system back into standby mode to prepare for the next acquisition task.

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