Primordial gravitational wave detection signal reading system and method

Abstract

The application provides a kind of original gravity wave detection signal reading system and method, the system includes: field programmable logic gate array, the field programmable logic gate array includes digital sequence storage module and logic processing module;Digital-analog converter, for converting the first digital signal read from the digital sequence storage module into first analog signal;Detector array, for adjusting the first analog signal based on original gravity wave detection signal, output second analog signal;Analog-digital converter, for converting the second analog signal into second digital signal, and the second digital signal is sent to the logic processing module;Processor, for processing the logic processing signal, output the phase image data of original gravity wave detection signal.The original gravity wave detection signal reading system and method provided by the embodiment of the application improve the reading efficiency and accuracy of original gravity wave.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of radio astronomy, and in particular to a system and method for reading a primordial gravitational wave detection signal. BACKGROUND

[0002] In astronomy, gravitational wave sources are roughly divided into two types, one is astrophysical origin, and the other is cosmological origin, wherein the gravitational wave of cosmological origin is also called primordial gravitational wave. Currently, the observation of primordial gravitational wave mainly relies on a primordial gravitational wave telescope, which mainly consists of a Transition-Edge Sensor (TES), a cryogenic box, a readout system, and the like. The TES detector is a kind of terahertz detector, and the terahertz band accounts for nearly half of the photon energy in the cosmic space after the cosmic microwave background radiation. This band plays an irreplaceable role in astronomical research.

[0003] Primordial gravitational wave signals are extremely weak, and detecting primordial gravitational waves requires reading tens of thousands of superconducting transition-edge sensors (TES) to meet the stringent requirements of noise, precision, and stability to achieve the required sensitivity. However, there are currently no practical application cases of large-scale TES detector array readout systems in China. SUMMARY

[0004] The present application provides a system and method for reading a primordial gravitational wave detection signal to solve the problems in the prior art.

[0005] The present application provides a system for reading a primordial gravitational wave detection signal, comprising: a field programmable logic gate array, which includes a digital sequence storage module and a logic processing module, the digital sequence storage module is used to send a first digital signal to a digital-to-analog converter;

[0006] a digital-to-analog converter for converting the first digital signal read from the digital sequence storage module into a first analog signal;

[0007] a detector array for adjusting the first analog signal based on a primordial gravitational wave detection signal and outputting a second analog signal;

[0008] an analog-to-digital converter for converting the second analog signal into a second digital signal and sending the second digital signal to the logic processing module, the logic processing module is used to process the second digital signal and output a logic processing signal;

[0009] a processor for processing the logic processing signal and outputting phase image data of the primordial gravitational wave detection signal.

[0010] The primary gravitational wave detection signal reading system provided by the present application further comprises a switch, one end of the switch is electrically connected with the logic processing module of the field programmable logic gate array, and the other end of the switch is electrically connected with the plurality of processors.

[0011] The primary gravitational wave detection signal reading system provided by the present application further comprises a memory, which is used for storing the phase image data of the primary gravitational wave detection signal.

[0012] The primary gravitational wave detection signal reading system provided by the present application, wherein the processor comprises a central processing unit and a graphic processing unit.

[0013] The primary gravitational wave detection signal reading system provided by the present application, wherein the detector array comprises a plurality of detector units, and each detector unit comprises a superconducting quantum interference device and a superconducting phase transition edge detector.

[0014] The primary gravitational wave detection signal reading method provided by the present application comprises the following steps: the first digital signal sent by the digital sequence storage module is converted into a first analog signal through a digital-to-analog converter, the first analog signal is converted into a second analog signal through a detector array, and the second analog signal is converted into a second digital signal through an analog-to-digital converter.

[0015] The second digital signal is sequentially subjected to filtering, Fourier transform, frequency selection and frequency conversion in the logic processing module, so as to obtain a logic processing signal and send the logic processing signal to a processor.

[0016] The logic processing signal is sequentially subjected to phase calculation, demodulation sawtooth wave and integration in the processor, so as to output phase image data of the primary gravitational wave detection signal.

[0017] The primary gravitational wave detection signal reading method provided by the present application comprises the following steps: the first digital signal sent by the digital sequence storage module is converted into a first analog signal through a digital-to-analog converter, the first analog signal is converted into a second analog signal through a detector array, and the second analog signal is converted into a second digital signal through an analog-to-digital converter.

[0018] The second digital signal is sequentially subjected to filtering, Fourier transform, frequency selection and frequency conversion in the logic processing module, so as to obtain a logic processing signal, and the logic processing signal is sent to a plurality of processors through a switch.

[0019] The logic processing signal is sequentially subjected to phase calculation, demodulation sawtooth wave and integration in the plurality of processors, so as to output phase image data of the primary gravitational wave detection signal.

[0020] The primary gravitational wave detection signal reading system and method provided by the application, by partitioning the detection signal of the primary gravitational wave detector, that is, the detection signal is first processed in the logic processing module of the field programmable logic gate array to obtain a logic processing signal, and then the logic processing signal is processed again in the processor to finally output the phase image data of the primary gravitational wave detection signal, the above processing mode improves the reading efficiency and reading accuracy of the detection signal. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0022] Figure 1 is one of the structural schematic diagrams of the primary gravitational wave detection signal reading system provided by the application;

[0023] Figure 2 is the second structural schematic diagram of the primary gravitational wave detection signal reading system provided by the application;

[0024] Figure 3 is one of the flow schematic diagrams of the primary gravitational wave detection signal reading method provided by the application;

[0025] Figure 4 is the second flow schematic diagram of the primary gravitational wave detection signal reading method provided by the application;

[0026] Figure 5 is the third flow schematic diagram of the primary gravitational wave detection signal reading method provided by the application. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the application more clear, the technical solutions in the application will be described clearly and completely in the following combined with the drawings in the application. Obviously, the described embodiments are some embodiments of the application, not all embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the application.

[0028] Figure 1 is one of the structural schematic diagrams of the primary gravitational wave detection signal reading system provided by the application, as Figure 1 shown, the system comprises:

[0029] A field programmable gate array (FPGA) includes a digital sequence storage module and a logic processing module, the digital sequence storage module is configured to send a first digital signal to a digital-to-analog converter (DAC);

[0030] The DAC is configured to convert the first digital signal read from the digital sequence storage module into a first analog signal.

[0031] A detector array is configured to adjust the first analog signal based on a primary gravitational wave detection signal and output a second analog signal.

[0032] An analog-to-digital converter (ADC) is configured to convert the second analog signal into a second digital signal and send the second digital signal to the logic processing module, and the logic processing module is configured to process the second digital signal and output a logic processing signal.

[0033] A processor is configured to process the logic processing signal and output phase image data of the primary gravitational wave detection signal.

[0034] It should be noted that the field programmable gate array (FPGA) is a product further developed on the basis of PAL, GAL, CPLD and other programmable devices. It is a semi-custom circuit in the field of application-specific integrated circuit (ASIC) and solves the shortcomings of custom circuits and overcomes the limitation of the number of gate circuits of the original programmable device. The circuit design completed by the hardware description language (Verilog or VHDL) can be quickly burned to the FPGA for testing after simple synthesis and layout, which is the mainstream technology of modern IC design verification. These editable elements can be used to implement some basic logic gate circuits (such as AND, OR, XOR, NOT) or more complex combination functions such as decoders or mathematical equations. In the embodiment of the present application, the FPGA includes a digital sequence storage module and a logic processing module, wherein the digital sequence storage module is configured to send a first digital signal to a digital-to-analog converter (DAC).

[0035] The DAC is a kind of converter that converts discrete signals in the form of binary digital quantity into analog signals with standard quantity as the reference. In the embodiment of the present application, the DAC is configured to convert the first digital signal read from the digital sequence storage module into a first analog signal.

[0036] A plurality of detector units are connected in parallel to form a detector array, and the detection capability of the detector array for the primary gravitational wave is much stronger than that of a single detector unit, and is suitable for the detection process of the weak signal of the primary gravitational wave. In the embodiment of the present application, the detector array is configured to adjust the first analog signal based on a primary gravitational wave detection signal and output a second analog signal.

[0037] Analog-to-digital converter (ADC) is a converter for converting analog quantity processed by comparison with a standard quantity into a discrete signal represented by binary value, and the conversion process of ADC and DAC is a reciprocal process. In the embodiment of the present application, the ADC is used to convert the second analog signal into a second digital signal, and the second digital signal is sent to the logic processing module, and then the logic processing module processes the second digital signal to output a logic processing signal.

[0038] The processor includes a central processing unit (CPU) and a graphics processing unit (GPU). In the embodiment of the present application, the processor is used to process the logic processing signal to output phase image data of the original gravitational wave detection signal.

[0039] It should be noted that the whole process of processing the original gravitational wave detection signal in the prior art is completed on the FPGA, and the data processing program of the FPGA is strongly dependent on the electronic element arrangement thereon. Whenever the data processing flow is changed, the electronic elements on the FPGA need to be rearranged. Based on this, the processing process of the detection signal based on the FPGA is relatively fixed and difficult to change. Even if it is changed, it will face the problem of high cost. In the embodiment of the present application, the FPGA is used to realize the processing process of filtering, Fourier transform, frequency selection and frequency modulation of the original gravitational wave detection signal. The common feature of the above processing flow is that the processing process is fixed and does not need to be frequently replaced, and can be applied to various processing requirements. At the same time, the processor is used to realize the subsequent processing process of the original gravitational wave detection signal, specifically including phase calculation, demodulation sawtooth wave and integral calculation. The feature of the above three flows is that the specific processing process needs to be adjusted in real time according to the actual demand, and the requirement for flexible adjustment is high. The specific processing process of the processor is strongly dependent on the software program, and the adjustment of the software program on the processor is very flexible and easy to operate.

[0040] The original gravitational wave detection signal reading system provided by the present application improves the reading efficiency and accuracy of the detection signal by processing the detection signal of the original gravitational wave detector in the logic processing module of the field programmable gate array (FPGA) to obtain a logic processing signal, and then processing the logic processing signal in the processor to finally output phase image data of the original gravitational wave detection signal. At the same time, based on the reading system, more complex algorithms can be executed and the data processing process on the processor can be flexibly modified and upgraded, thereby improving the matching degree of the processing process and the actual application scene and improving the data processing reliability.

[0041] Figure 2 is a structure schematic view of the original gravitational wave detection signal reading system provided by the present application, and Figure 2As shown, the system further comprises a switch, one end of the switch being electrically connected to the logic processing module of the field programmable logic gate array, and the other end of the switch being electrically connected to a plurality of processors.

[0042] It should be noted that the switch is a network device for forwarding electrical signals, which can provide exclusive electrical signal paths for any two network nodes connected to the switch. In the embodiment of the present application, one end of the switch is electrically connected to the logic processing module of the field programmable logic gate array, and the other end of the switch is electrically connected to a plurality of processors. Among them, the plurality of processors form a processor cluster to improve the processing capability of the detection signal.

[0043] Suppose there are 110 GPUs in the processor cluster, and each 11 GPUs are used for the calculation of a scientific target. The switch replicates and distributes the logic processing signals sent by the logic processing module. Each 11 GPUs form a processor sub-cluster corresponding to different scientific targets, and different calculations are performed on data from the same source. For example, processor sub-cluster 1 is used for studying spectral lines, processor sub-cluster 2 is used for studying primary gravitational waves, and processor sub-cluster 3 is used for studying pulsars. Through the process of data replication and distribution by the switch, the processing of the detection signal is realized in parallel. At the same time, because astronomical data is large, it is impossible to save all the data and then process it slowly, that is, astronomical data has real-time requirements for data processing. The use of the switch also meets the real-time processing requirements of astronomical data to some extent, thereby maximizing the use of primary gravitational wave signal detection data.

[0044] The primary gravitational wave detection signal reading system provided by the present application realizes real-time reading and processing of primary gravitational wave signal detection data under different scientific target requirements by setting a switch in the system and connecting the logic processing module and the processor cluster with the switch. The detection data is maximized, and the accuracy of signal detection is improved.

[0045] According to the primary gravitational wave detection signal reading system provided by the present application, the system further comprises a memory for storing phase image data of the primary gravitational wave detection signal.

[0046] It should be noted that in the embodiment of the present application, the memory is used to store the phase image data of the primary gravitational wave detection signal output by the processor. The specific model and type of the memory are not limited.

[0047] The primary gravitational wave detection signal reading system provided by the application stores the phase image data of the primary gravitational wave detection signal output by the processor, so that the phase image data can be retrieved and used after the detection process is completed.

[0048] The primary gravitational wave detection signal reading system provided by the application comprises a processor.

[0049] It should be noted that in the embodiment of the application, the processor is composed of a central processing unit (CPU) and a graphics processing unit (GPU), and the number relationship between the CPU and the GPU can be one-to-one, one-to-many or many-to-one, which can be reasonably adjusted according to specific requirements; in the process of processing the primary gravitational wave detection signal by using the processor, the GPU performs phase calculation processing and demodulation sawtooth wave processing, and the CPU performs integral processing.

[0050] The primary gravitational wave detection signal reading system provided by the application comprises a processor composed of a CPU and a GPU, and the processor is used to process the detection signal and finally output the phase image data of the primary gravitational wave detection signal, which effectively improves the processing efficiency under the premise of ensuring the processing accuracy.

[0051] The primary gravitational wave detection signal reading system provided by the application comprises a plurality of detector units, and each detector unit comprises a superconducting quantum interference device and a superconducting phase transition edge detector.

[0052] It should be noted that when a single detector is used to detect the primary gravitational wave, the primary gravitational wave signal is very weak, so good detection results cannot be obtained, and in the embodiment of the application, a plurality of detector units are connected in parallel to form a detector array to detect the primary gravitational wave signal, which improves the accuracy of signal detection and ensures the accuracy of subsequent reading results. At the same time, each detector unit is composed of a superconducting quantum interference device (SQUID) and a superconducting phase transition edge detector (TES).

[0053] The primary gravitational wave detection signal reading system provided by the application comprises a plurality of detector units connected in parallel to form a detector array, which improves the accuracy of primary gravitational wave signal detection and further ensures the accuracy of subsequent reading results.

[0054] Figure 3 is one of the flowcharts of the primary gravitational wave detection signal reading method provided by the application, as shown in Figure 3 The method comprises the following steps.

[0055] S110, the first digital signal sent by the digital sequence storage module is converted into a first analog signal by a digital-to-analog converter, the first analog signal is converted into a second analog signal by a detector array, and the second analog signal is converted into a second digital signal by an analog-to-digital converter;

[0056] S120, the second digital signal is sequentially subjected to filtering, Fourier transform, frequency selection and frequency conversion in the logic processing module to obtain a logic processing signal, and the logic processing signal is sent to a processor;

[0057] S130, the logic processing signal is sequentially subjected to phase calculation, demodulation sawtooth wave and integration processing in the processor to output phase image data of the original gravitational wave detection signal.

[0058] It should be noted that the digital sequence storage module in the field programmable logic gate array (FPGA) sends a first digital signal, the digital-to-analog converter (DAC) receives and converts the first digital signal to obtain a corresponding first analog signal, the first analog signal is converted into a second analog signal by a detector array, and the analog-to-digital converter (ADC) receives and converts the second analog signal to obtain a corresponding second digital signal.

[0059] The second digital signal is sequentially subjected to filtering, Fourier transform, frequency selection and frequency conversion in the logic processing module in the FPGA to obtain a logic processing signal, and the logic processing signal is sent to a processor.

[0060] It should be noted that the filtering process in the above process is to filter out noise to avoid interference of the noise on the subsequent processing process; the frequency conversion is often used for frequency reduction to reduce the frequency of the detection signal, and the processing difficulty of the low-frequency signal is much lower than that of the high-frequency signal, which improves the processing efficiency and accuracy of the signal to a certain extent.

[0061] The logic processing signal is sequentially subjected to phase calculation, demodulation sawtooth wave and integration processing in the processor to output phase image data of the original gravitational wave detection signal. In the above processing process, the demodulation sawtooth wave processing is based on the jitter of the phase signal obtained by the scientific target, and the integration calculation is to reduce the rate of the scientific data. The original gravitational wave detection signal reading method provided by the application sequentially subjects the original gravitational wave detection signal to filtering, Fourier transform, frequency selection and frequency conversion in the logic processing module to obtain a logic processing signal, then sends the logic processing signal to the processor, sequentially performs phase calculation, demodulation sawtooth wave and integration processing, and finally outputs phase image data of the original gravitational wave detection signal. Through the partial processing of the original gravitational wave detection signal, the processing efficiency and accuracy of the signal are improved.

[0062] Figure 4is the second flowchart of the original gravitational wave detection signal reading method provided by the application, as shown in Figure 4 The method comprises the following steps:

[0063] In S210, the first digital signal sent by the digital sequence storage module is converted into a first analog signal by a digital-to-analog converter, the first analog signal is converted into a second analog signal by a detector array, and the second analog signal is converted into a second digital signal by an analog-to-digital converter.

[0064] In S220, the second digital signal is sequentially subjected to filtering, Fourier transform, frequency selection and frequency conversion in a logic processing module to obtain a logic processing signal, and the logic processing signal is sent to multiple processors by a switch.

[0065] In S230, the logic processing signal is sequentially subjected to phase calculation, demodulation sawtooth wave and integration processing in a processor to output phase image data of the original gravitational wave detection signal.

[0066] It should be noted that the original gravitational wave detection signal is sequentially subjected to filtering, Fourier transform, frequency selection and frequency conversion in the logic processing module to obtain a logic processing signal, and the obtained logic processing signal is copied and distributed to multiple processors by a switch. There are two types of distribution of the switch when distributing the logic processing signal, one is based on the characteristics of the original gravitational wave detection, and the other is based on different scientific objectives. The scientific objective refers to different processing requirements for the detection signal, such as the study of spectral lines and the study of pulsars.

[0067] ① The switch distributes based on the characteristics of the original gravitational wave detection. Since the large-scale detector array has a total of 19 modules, each module has 1712 TES detectors, and when the signal is distributed, the detection signals on the same module are distributed to the same sub-cluster for processing.

[0068] ② The switch distributes based on different scientific objectives. Based on the scientific objectives, multiple different sub-clusters are set, and multiple processors form a processor cluster. Assuming that there are 110 GPUs in the processing cluster, and each 11 GPUs are used for the calculation of one scientific objective, the switch copies and distributes the logic processing signal sent by the logic processing module, and each 11 GPUs form a processor sub-cluster corresponding to different scientific objectives. The switch performs distribution processing based on the different scientific objectives.

[0069] The astronomical data cannot be stored and processed offline due to a large amount of data, and the reading process of the astronomical data has strong real-time performance. In addition, the observation time of the astronomical telescope is very valuable, and the observation time of the telescope should be used as much as possible to improve the data reuse rate. For example, if the observation time of the telescope is only 35 hours, the 35 hours of observation of the telescope scans a certain sky area. If the data is not copied and distributed, the 35 hours of observation is generally used for only one scientific target, such as the research of the original gravitational wave. If other scientific research is needed, other observation time is needed, so if several scientific targets are researched, the observation time of the telescope will be multiplied.

[0070] The original gravitational wave detection signal reading method provided by the application can improve the processing efficiency and accuracy of the signal by processing the original gravitational wave detection signal in parts. At the same time, the switch can copy and distribute the detection signal, realize parallel processing of the detection signal based on different scientific targets, effectively improve the utilization rate of the detection signal, fully utilize the observation time of the telescope, and enrich the types of data acquisition.

[0071] Figure 5 Figure 3 is a flowchart of the original gravitational wave detection signal reading method provided by the application, as shown in Figure 5 The method comprises the following steps.

[0072] Step 1, the digital sequence storage module in the field programmable logic gate array (FPGA) continuously sends out a first digital signal via a digital-to-analog converter (DAC), and outputs a second digital signal after passing through a superconducting phase change edge detector array.

[0073] Step 2, the second digital signal is transmitted to the field programmable logic gate array (FPGA) for processing after passing through an analog-to-digital converter (ADC).

[0074] Step 3, the second digital signal is processed by filtering (FIR), Fourier transform (FFT), frequency selection and digital down conversion (DDC) on the FPGA, and a logic processing signal is output.

[0075] Step 4, the logic processing signal is copied and distributed by the Multicast Swich switch and transmitted to the GPU.

[0076] Step 5, the logic processing signal is subjected to phase calculation, sawtooth wave demodulation and integral calculation on the GPU to obtain a processing result;

[0077] Step 6, the processing result is saved, such as being stored in a database.

[0078] The original gravitational wave detection signal reading method provided by the application obtains a logic processing signal by sequentially performing filtering, Fourier transform, frequency selection and frequency conversion processing on the original gravitational wave detection signal on the FPGA, then sends the logic processing signal to a processor, sequentially performs phase calculation, demodulation sawtooth wave and integral processing, and finally outputs phase image data of the original gravitational wave detection signal. Through the partial processing of the original gravitational wave detection signal, the processing efficiency and accuracy of the signal are improved. At the same time, with the help of the copying and distribution process of the switch for the detection signal, parallel processing of the detection signal based on different scientific targets is realized, the utilization rate of the detection signal is effectively improved, the observation time of the telescope is fully utilized, and the types of data acquisition are enriched.

[0079] The device embodiments described above are only schematic, wherein the units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, i.e., can be located in one place, or can be distributed on a plurality of network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the embodiments of the present application. Those skilled in the art can understand and implement without creative labor.

[0080] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the application, and not to limit them; although the application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the application.

Claims

1. A primordial gravitational wave probe signal reading system characterized by, The system comprises: a field programmable logic gate array, comprising a digital sequence storage module and a logic processing module, the digital sequence storage module being configured to send a first digital signal to a digital-to-analog converter; the digital-to-analog converter being configured to convert the first digital signal read from the digital sequence storage module into a first analog signal; a detector array being configured to adjust the first analog signal based on a primary gravitational wave detection signal and output a second analog signal; an analog-to-digital converter being configured to convert the second analog signal into a second digital signal and send the second digital signal to the logic processing module; the logic processing module being configured to process the second digital signal and output a logic processing signal; a processor being configured to process the logic processing signal and output phase image data of the primary gravitational wave detection signal.

2. The primordial gravitational wave probe signal reading system of claim 1, wherein, The system further comprises a switch, one end of the switch being electrically connected to the logic processing module of the field programmable logic gate array, and the other end of the switch being electrically connected to a plurality of processors.

3. The primordial gravitational wave probe signal reading system of claim 1, wherein, The system further comprises a memory configured to store the phase image data of the primary gravitational wave detection signal.

4. The primordial gravitational wave probe signal reading system of claim 1, wherein, The processor comprises a central processing unit and a graphics processing unit.

5. The primordial gravitational wave probe signal reading system of claim 1, wherein, The detector array comprises a plurality of detector units, each of the detector units comprising a superconducting quantum interference device and a superconducting phase transition edge detector.

6. A method for reading a primary gravitational wave detection signal by using the primary gravitational wave detection signal reading system of claim 1, wherein: the first digital signal sent by the digital sequence storage module is converted into a first analog signal by the digital-to-analog converter, the first analog signal is converted into a second analog signal by the detector array, and the second analog signal is converted into a second digital signal by the analog-to-digital converter; the second digital signal is sequentially subjected to filtering, Fourier transform, frequency selection and frequency conversion in the logic processing module to obtain a logic processing signal, and the logic processing signal is sent to the processor; the logic processing signal is sequentially subjected to phase calculation, demodulation sawtooth wave and integration in the processor to output phase image data of the primary gravitational wave detection signal.

7. A method for reading a primary gravitational wave detection signal by using the primary gravitational wave detection signal reading system of claim 2, wherein: the first digital signal sent by the digital sequence storage module is converted into a first analog signal by the digital-to-analog converter, the first analog signal is converted into a second analog signal by the detector array, and the second analog signal is converted into a second digital signal by the analog-to-digital converter; the second digital signal is sequentially subjected to filtering, Fourier transform, frequency selection and frequency conversion in the logic processing module to obtain a logic processing signal, and the logic processing signal is sent to a plurality of processors via the switch; the logic processing signal is sequentially subjected to phase calculation, demodulation sawtooth wave and integration in the plurality of processors to output phase image data of the primary gravitational wave detection signal.

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