A multi-channel micro-current signal synchronous acquisition system and acquisition method

Abstract

The present application relates to a kind of multi-channel micro-current signal synchronous acquisition system and acquisition method, belong to the precision measurement technology of electronic information technology field.The system includes signal conversion amplification module, data acquisition module and data processing module.Signal conversion amplification module is used to convert the weak current signal generated by photoelectric detector into voltage signal, and is amplified.Data acquisition module includes multiple synchronous acquisition channels and reference source, for parallel acquisition to multi-channel amplified voltage signal, and upload to data processing module.Data processing module has automatic calibration function, can calibrate system before acquisition, to ensure the precision and consistency of data acquisition.The present application can real-time parallel acquisition weak current signal of photoelectric detector array by multi-channel synchronous processing, improve acquisition precision, resolution and channel number, meet the application demand of high-precision, high-flux photoelectric detection, and ensure the reliability and accuracy of data in complex environment.

Description

TECHNICAL FIELD

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

[0002] With the rapid development of photodetection technology, the application demand of photodetector array in scientific research, industrial detection, medical imaging and other fields is increasing, and the requirement of high-precision, multi-channel data acquisition gradually becomes an important basis for these applications. However, the current signal acquisition system usually relies on independent signal conversion and amplification modules to convert weak photocurrent signals into voltage signals convenient for processing, and record data through acquisition modules. Such a scheme has significant limitations, especially in high-channel and high-precision synchronous acquisition applications, the problems of low system integration, complex hardware connection and poor anti-interference ability are particularly obvious.

[0003] Most of the existing multi-channel acquisition systems adopt independent modular design, and 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 leads to a long signal transmission path, 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 function, and it is difficult to realize high-precision real-time data synchronization in a multi-channel environment, which limits the accuracy and stability of signal acquisition. In the case of unstable environmental conditions or varied application scenarios, the system often has difficulty in maintaining the accuracy and consistency of data, thereby limiting the expansion of application scenarios.

[0004] Therefore, the existing multi-channel micro-current acquisition system has great deficiencies in system integration, anti-noise performance, real-time performance and automatic calibration capability, and 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 requirements in high-throughput and complex environments. SUMMARY

[0005] Therefore, the present application proposes a multi-channel micro-current signal synchronous acquisition system for a photodetector array, which solves the problem of high-precision synchronization in multi-channel acquisition in the prior art by highly integrated system design, significantly improving the accuracy and efficiency of data acquisition. This system not only enables precise signal synchronization in multi-channel acquisition, but also simplifies the hardware structure, thereby reducing the overall cost and meeting the application requirements of high-throughput and high-precision photodetection.

[0006] In order to achieve the above-mentioned purpose, the application provides a multi-channel micro-current signal synchronous acquisition system for a photoelectric detector array, which comprises a signal conversion and amplification module, a data acquisition module and a data processing module.

[0007] The signal conversion and amplification module comprises a plurality of signal conversion amplifiers, which are one-to-one corresponding to and connected with the photoelectric detectors, for receiving the weak current signals generated by the photoelectric detectors, converting the weak current signals into voltage signals and amplifying the voltage signals.

[0008] The data acquisition module comprises a reference source and a plurality of synchronous acquisition channels, for performing parallel acquisition on the multi-channel amplified voltage signals from the signal conversion and amplification module, realizing multi-channel synchronous acquisition, and ensuring the time consistency and data accuracy of the signals through the reference source; the synchronous acquisition channels are one-to-one corresponding to and connected with the signal conversion amplifiers, the synchronous acquisition channels acquire the signals from the corresponding signal conversion amplifiers, and upload the acquired data to the data processing module through a unified TCP / IP interface or a serial interface.

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

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

[0011] Further, the plurality of synchronous acquisition channels in the data acquisition module are synchronously controlled through the reference source, the reference source can provide a millisecond-level precision synchronous signal, so as to ensure the real-time performance and synchronism of the multi-channel data acquisition, so as to meet the high-precision photoelectric detection application requirements.

[0012] Further, the data processing module also has an automatic calibration function, the automatic calibration function can automatically perform calibration operation before each data acquisition, calibrate the gain coefficients of the calibration reference signal source and the acquisition channels, and realize comprehensive calibration of the acquisition system, so as to improve the precision and consistency of data acquisition.

[0013] A multi-channel micro-current signal synchronous acquisition system acquisition method is realized through the above-mentioned multi-channel micro-current signal synchronous acquisition system for a photoelectric detector array, and the specific process is as follows:

[0014] Step 1: Start the system. The data processing module and data acquisition module enter standby mode and then perform a system self-test. The data processing module initializes the data acquisition module by setting the hardware and software parameters of the acquisition port to complete the system configuration.

[0015] Step 2: If the self-test is completed, proceed to Step 3. If the self-test is not completed, return to standby mode and wait for the self-test to restart.

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

[0017] Step 4: When the system receives the acquisition command, the data processing module sets all acquisition channels to synchronous mode and starts parallel acquisition of the data acquisition module. The acquired real-time data is transmitted to the data processing module through TCP / IP or serial port interface.

[0018] Step 5: The data processing module performs preprocessing operations on the received acquisition data, including noise reduction 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 storage is completed, 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 command to the data acquisition module; the data acquisition module disconnects the acquisition tasks of each channel in sequence 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 precision 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) Automatic system calibration: The automatic calibration function of the system can perform benchmark calibration on each channel before acquisition, compensate for the error between channels, ensure high accuracy and consistency of data acquisition, and improve the stability of the system in complex environments. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention.

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

[0026] Figure 2 This is a flowchart of the process of the present invention. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the illustrative embodiments and their descriptions are only used to explain the embodiments of this disclosure and are not intended to limit the embodiments of this disclosure.

[0028] A multi-channel micro-current signal synchronous acquisition system for a photodetector array, the system comprising: a signal conversion and amplification module for receiving weak current signals generated by the photodetector, converting the weak current signals into voltage signals, and amplifying the voltage signals with high precision; the amplification module is capable of amplifying weak current signals in the picoampere to nanoampere range with high precision to generate voltage signals that are easy to process; the detection range of the current signals includes the picoampere (pA), nanoampere (nA), and microampere (μA) ranges.

[0029] The data acquisition module includes multiple synchronous acquisition channels and a reference source. It achieves real-time synchronous acquisition of multiple channels through the synchronization signal provided by the reference source. The data acquisition module can perform parallel acquisition of multi-channel amplified voltage signals from the signal conversion and amplification module, and upload the acquired data to the data processing module through a TCP / IP interface or a serial port interface.

[0030] The data processing module receives data from the data acquisition module, integrates host computer and cloud service functions, and features automatic calibration. This automatic calibration function calibrates the system before data acquisition to ensure the accuracy and consistency of the acquired data, thereby adapting to changes in environmental conditions and maintaining the stability of the acquired data. The data processing module not only processes and displays data in real time but also supports data storage and cloud uploading, enabling 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 the picoampere level to the nanoampere level 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 achieve synchronous control through a shared reference source. The reference source can provide a synchronization signal with millisecond-level accuracy, thereby ensuring the real-time performance and synchronization of multi-channel data acquisition to meet the requirements of high-precision photoelectric detection applications.

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

[0034] The embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings.

[0035] Reference Figure 1 This embodiment discloses a multi-channel microcurrent signal synchronous acquisition system for photodetector arrays, such as... Figure 1 As shown, the system 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 signals generated by the photodetector array 1, thereby achieving high-precision acquisition and analysis of the photodetector array signals.

[0036] The signal conversion and amplification module 2 comprises multiple amplifiers, each electrically connected to a photodetector in the photodetector array 1. The signal conversion and amplification module 2 receives the weak current signal generated by the photodetector array 1 and converts it into an analog voltage signal suitable for subsequent processing. The amplified voltage signal is transmitted from the output 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 output terminal of the corresponding amplifier 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 voltage signals 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 storage repository. The host computer system performs noise reduction and smoothing on the received multi-channel data, and compensates for errors based on calibration parameters to ensure data consistency and accuracy. The processed data is stored in a local data storage repository and simultaneously backed up to a cloud database to prevent data loss and support remote access. The host computer system can also perform in-depth analysis of the stored data, generate charts and reports, and display the data acquisition results in real time.

[0039] like Figure 2 As shown, the operating method of a multi-channel micro-current signal synchronous acquisition system for a photodetector array disclosed in this invention includes the following steps:

[0040] (1) System Startup and Standby: After system startup, data processing module 4 and data acquisition module 3 enter standby mode. Data processing module 4 initializes data acquisition module 3 by setting the hardware and software parameters of the acquisition ports to complete system configuration. System self-test includes checking hardware connection status, software status, and communication status to ensure that all acquisition ports are properly connected. After confirming that everything is correct, the system initializes the parameters of each acquisition channel to prepare 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 acquires the reference data of the initial state and calibrates each channel based on this reference data to eliminate the initial deviation between channels. After calibration is completed, the system enters standby mode and waits for acquisition commands.

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

[0043] (4) Data Preprocessing and Calibration Compensation: The data processing module 4 performs preprocessing operations on the received acquisition data, including noise reduction and smoothing. Simultaneously, the system performs error compensation on the data from each channel according to previously set calibration parameters to ensure data consistency and accuracy. The processed data is stored in a local data repository and backed up to a cloud database for easy remote access and to prevent data loss.

[0044] (5) Data Analysis and Report Generation: After data storage is completed, data processing module 4 can further analyze the data and generate corresponding charts and reports. Users can view the data analysis results through a host computer or remote client. The system supports the generation of intuitive charts to enable users to comprehensively monitor the data collection process.

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

[0046] In summary, this invention provides a multi-channel micro-current signal synchronous acquisition system for photodetector arrays. Through a highly integrated design, it achieves high-precision synchronous acquisition and automatic calibration of multi-channel signals. The system exhibits excellent synchronization performance and anti-interference capabilities, ensuring the accuracy and stability of weak current signal acquisition. Compared to existing technologies, this invention significantly simplifies the hardware structure, reduces signal loss and noise interference, and is particularly suitable for photodetector applications requiring high-precision, multi-channel data acquisition.

Claims

1. A multi-channel micro-current signal synchronous acquisition system for a photodetector array, characterized in that, The signal conversion amplification module, the data acquisition module and the data processing module are included. The signal conversion amplification module includes a plurality of signal conversion amplifiers, which are one-to-one corresponding to and connected with the photodetectors, for receiving the weak current signals generated by the photodetectors, converting the weak current signals into voltage signals and amplifying the voltage signals. The data acquisition module includes a reference source and a plurality of synchronous acquisition channels, for performing parallel acquisition on the multi-channel amplified voltage signals from the signal conversion amplification module, realizing multi-channel synchronous acquisition, and ensuring the time consistency and data accuracy of the signals through the reference source; the synchronous acquisition channels are one-to-one corresponding to and connected with the signal conversion amplifiers, and the synchronous acquisition channels acquire the signals from the corresponding signal conversion amplifiers and upload the acquired data to the data processing module through a unified TCP / IP interface or a serial interface. The data processing module integrates an upper computer and a data storage library, wherein the upper computer system performs denoising and smoothing processing on the received multi-channel data, and performs error compensation on the data according to calibration parameters, so as to ensure the consistency and accuracy of the data; the processed data is stored in the local data storage library and simultaneously backed up to a cloud database, so as to prevent data loss and support remote access; the upper computer system can also perform deep analysis on the stored data, generate charts and reports, and display the results of data acquisition in real time. 2.The multi-channel micro-current signal synchronous acquisition system for a photodetector array of claim 1, wherein, The current signal detection range of the signal conversion amplification module includes picoampere level, nanoampere level and microampere level. 3.The multi-channel micro-current signal synchronous acquisition system for photodetector array of claim 1, wherein, The plurality of synchronous acquisition channels in the data acquisition module realize synchronous control through the reference source, and the reference source can provide a millisecond-level precision synchronous signal, so as to ensure the real-time performance and synchronization of multi-channel data acquisition, so as to meet the application requirements of high-precision photodetection.

4. The multi-channel micro-current signal synchronous acquisition system for photodetector array according to claim 1, characterized in that, The data processing module also has an automatic calibration function, which can automatically perform calibration before each data acquisition, and realize comprehensive calibration of the acquisition system by calibrating the gain coefficients of the reference signal source and the acquisition channels, so as to improve the precision and consistency of data acquisition.

5. A collection method of a multi-channel micro-current signal synchronous collection system, characterized in that, The multi-channel micro-current signal synchronous acquisition system for the photodetector array is realized by the system according to 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, then perform system self-checking, the data processing module initializes the data acquisition module, and completes system configuration by setting hardware parameters and software parameters of the acquisition port; Step 2, if the self-checking is completed, proceed to step 3, if the self-checking is not completed, re-enter the standby state and wait for re-self-checking; Step 3, after the self-checking 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 the acquisition channels to the synchronous mode, starts the parallel acquisition of the data acquisition module, and transmits the acquired real-time data to the data processing module through a TCP / IP or serial interface. Step 5, the data processing module pre-processes the received acquisition data, including denoising and smoothing; at the same time, the system compensates errors of each channel data according to the previously set calibration parameters; the subsequent data is stored in the local data storage and backed up to the cloud database; Step 6, after the data storage is completed, the data processing module further analyzes the data to generate corresponding charts and reports; 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 state, ready for the next acquisition task.

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