Particle number resolution time-to-digital conversion system, method, device and medium

Abstract

The invention relates to a particle number resolution time-to-digital conversion system, method and equipment and a medium. The system comprises a signal processing module which is used for processing a received pulse signal through an amplification delay circuit, a first amplification circuit and a second amplification circuit to obtain a first analog signal, a second analog signal and a third analog signal; the time-to-digital conversion module is used for processing the first analog signal and the second analog signal and outputting a time thermometer code representing time information; the particle number distinguishing module is used for receiving the third analog signal and carrying out particle number distinguishing to generate a particle number thermometer code representing particle number information; and the data processing storage module is used for respectively converting the time thermometer code and the particle number thermometer code into a time binary code and a particle number binary code and storing the time binary code and the particle number binary code in the same storage word. By adopting the system, multi-type particle detection and large-range and high-precision time measurement can be realized.

Description

Technical Field

[0001] The present application relates to the field of signal processing technology, and in particular to a particle number resolved time-to-digital conversion system, method, device and medium. Background Art

[0002] Time measurement technology has gone through the development stages of sundials, hourglasses, mechanical clocks, quartz clocks, and atomic clocks, and its measurement accuracy has been continuously improved. Time-to-digital conversion technology plays a key role in high-precision time measurement modules. Its core idea is to convert continuous time signals into discrete digital signals so that digital circuits can process and analyze them.

[0003] At present, time-to-digital conversion technology has been widely used in fields such as laser radar, particle physics, and quantum information, greatly promoting the vigorous development of these fields. At the same time, cutting-edge research in these fields has further put forward higher precision and more functional requirements for time-to-digital conversion technology. In the field of laser imaging, accurate measurement of photon arrival time can achieve three-dimensional distance imaging, and accurate measurement of the number of photon arrivals can achieve grayscale imaging; in the field of high-energy physics, it is not only hoped to accurately measure the arrival time of particles, but also to determine the number of particles at the same time, so as to more accurately restore the reaction process; in the field of quantum computing, accurate measurement of photon arrival time can ensure the accuracy of calculations, and determination of the number of photons can increase the speed of quantum computing. However, with the continuous improvement of the demand for high-precision time measurement in various fields, the existing time-to-digital conversion technology has limitations in the face of these complex and demanding application scenarios, and it is difficult to fully meet the comprehensive needs of multi-dimensional high-precision measurement. Summary of the invention

[0004] Based on this, it is necessary to provide a particle number resolved time-to-digital conversion system, method, device and medium to address the above technical problems.

[0005] A particle number resolution time-to-digital conversion system, the system comprising:

[0006] A signal processing module, a time-to-digital conversion module, a particle number resolution module and a data processing and storage module; the time-to-digital conversion module and the particle number resolution module are connected to the signal processing module and the data processing and storage module respectively;

[0007] The signal processing module is connected to the particle detector, and is used to receive the pulse signal output by the particle detector, and process the pulse signal through the amplification delay circuit, the first amplification circuit and the second amplification circuit respectively to obtain the first analog signal, the second analog signal and the third analog signal;

[0008] The time-to-digital conversion module includes a comparison circuit and a time-to-digital conversion circuit, wherein the comparison circuit is used to process the first analog signal and the second analog signal to output a digital pulse signal, and the time-to-digital conversion circuit is used to generate a time thermometer code representing time information according to the digital pulse signal;

[0009] The particle number resolution module is used to receive the third analog signal and perform particle number resolution to generate a particle number thermometer code representing particle number information;

[0010] The data processing and storage module includes an encoder and a memory. The encoder is used to receive the time thermometer code and the particle number thermometer code and convert them into a time binary code and a particle number binary code respectively. The memory is used to store the time binary code and the particle number binary code of the same pulse signal in the same storage word.

[0011] A particle number resolution time-to-digital conversion method, the method comprising:

[0012] Receive a pulse signal output by the particle detector, and process the pulse signal through the amplification delay circuit, the first amplification circuit, and the second amplification circuit respectively to obtain a first analog signal, a second analog signal, and a third analog signal;

[0013] Processing the first analog signal and the second analog signal through the comparison circuit to output a digital pulse signal, and generating a time thermometer code representing time information according to the digital pulse signal through the time-to-digital conversion circuit;

[0014] The particle number resolution module receives the third analog signal and performs particle number resolution to generate a particle number thermometer code representing particle number information;

[0015] The encoder receives the time thermometer code and the particle number thermometer code and converts them into a time binary code and a particle number binary code respectively, and the memory stores the time binary code and the particle number binary code of the same pulse signal in the same storage word.

[0016] A computer device comprises a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0017] Receive a pulse signal output by the particle detector, and process the pulse signal through the amplification delay circuit, the first amplification circuit, and the second amplification circuit respectively to obtain a first analog signal, a second analog signal, and a third analog signal;

[0018] Processing the first analog signal and the second analog signal through the comparison circuit to output a digital pulse signal, and generating a time thermometer code representing time information according to the digital pulse signal through the time-to-digital conversion circuit;

[0019] The particle number resolution module receives the third analog signal and performs particle number resolution to generate a particle number thermometer code representing particle number information;

[0020] The encoder receives the time thermometer code and the particle number thermometer code and converts them into a time binary code and a particle number binary code respectively, and the memory stores the time binary code and the particle number binary code of the same pulse signal in the same storage word.

[0021] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the following steps:

[0022] Receive a pulse signal output by the particle detector, and process the pulse signal through the amplification delay circuit, the first amplification circuit, and the second amplification circuit respectively to obtain a first analog signal, a second analog signal, and a third analog signal;

[0023] Processing the first analog signal and the second analog signal through the comparison circuit to output a digital pulse signal, and generating a time thermometer code representing time information according to the digital pulse signal through the time-to-digital conversion circuit;

[0024] The particle number resolution module receives the third analog signal and performs particle number resolution to generate a particle number thermometer code representing particle number information;

[0025] The encoder receives the time thermometer code and the particle number thermometer code and converts them into a time binary code and a particle number binary code respectively, and the memory stores the time binary code and the particle number binary code of the same pulse signal in the same storage word.

[0026] The above-mentioned particle number resolution time digital conversion system, method, device and medium receive the analog signal output by the detector through the signal processing module, amplify and delay it, and the processed signals are respectively input into the particle number resolution module and the time digital conversion module. One amplified signal enters the particle number resolution module, measures the number of particles (N), and outputs it to the data processing and storage module; the other signal enters the time digital conversion module after being amplified by a small multiple and a large multiple and delayed. The module converts the two analog signals into digital pulse signals, measures the particle arrival time (T) based on the rising edge of the pulse signal, and outputs the time information to the data processing and storage module. The data processing and storage module converts the data format of the number of particles (N) and time (T), and stores them in the same storage word to ensure the relevance and synchronization of the data. The embodiment of the present invention realizes the simultaneous measurement of the particle arrival time and number, not only supports multi-type particle detection, but also can perform large-scale, high-precision time measurement, ensuring wide applicability and high-precision detection capabilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the structure of a particle number resolution time-to-digital conversion system in one embodiment;

[0028] Figure 2 is a schematic diagram of the structure of a signal processing module in one embodiment;

[0029] Figure 3 A schematic diagram of the structure of a particle number resolution module in one embodiment;

[0030] Figure 4 A schematic diagram of the structure of a time-to-digital conversion module in one embodiment;

[0031] Figure 5 A schematic diagram of the structure of a data processing and storage module in one embodiment;

[0032] Figure 6 A schematic diagram of a process of a particle number resolution time-to-digital conversion method in one embodiment;

[0033] Figure 7 FIG. 1 is a diagram showing the internal structure of a particle number resolved time-to-digital conversion device in one embodiment. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0035] The present invention proposes a particle number resolution time-to-digital conversion system, method, device and medium. The particle number resolution time-to-digital conversion system is built based on a signal processing module, a particle number resolution module, a time-to-digital conversion module and a data processing and storage module. The particle number resolution time-to-digital conversion can be realized in combination with a particle number resolution detector with known or unknown response characteristics, meeting the urgent application needs of various fields that expect to simultaneously measure the arrival time and number of particles.

[0036] In one embodiment, Figure 1 As shown, a particle number resolution time-to-digital conversion system is provided, comprising:

[0037] A signal processing module, a time-to-digital conversion module, a particle number resolution module, and a data processing and storage module; the time-to-digital conversion module and the particle number resolution module are connected to the signal processing module and the data processing and storage module respectively;

[0038] The signal processing module is connected to the particle detector, and is used to receive the pulse signal output by the particle detector, and process the pulse signal through the amplification delay circuit, the first amplification circuit and the second amplification circuit respectively to obtain the first analog signal, the second analog signal and the third analog signal;

[0039] The time-to-digital conversion module includes a comparison circuit and a time-to-digital conversion circuit, wherein the comparison circuit is used to process the first analog signal and the second analog signal to output a digital pulse signal, and the time-to-digital conversion circuit is used to generate a time thermometer code representing time information according to the digital pulse signal;

[0040] The particle number resolution module is used to receive the third analog signal and perform particle number resolution to generate a particle number thermometer code representing particle number information;

[0041] The data processing and storage module includes an encoder and a memory. The encoder is used to receive the time thermometer code and the particle number thermometer code and convert them into the time binary code and the particle number binary code respectively. The memory is used to store the time binary code and the particle number binary code of the same pulse signal in the same storage word.

[0042] In the above-mentioned particle number resolution time digital conversion method, the analog signal output by the detector is received by the signal processing module, amplified and delayed, and the processed signals are respectively input into the particle number resolution module and the time digital conversion module. One amplified signal enters the particle number resolution module, the particle number (N) is measured, and output to the data processing storage module; the other signal enters the time digital conversion module after being amplified by a small multiple and a large multiple and delayed. The module converts the two analog signals into digital pulse signals, measures the particle arrival time (T) based on the rising edge of the pulse signal, and outputs the time information to the data processing storage module. The data processing storage module converts the data format of the particle number (N) and time (T), and stores them in the same storage word to ensure the relevance and synchronization of the data. The embodiment of the present invention realizes the simultaneous measurement of the particle arrival time and quantity, not only supports multi-type particle detection, but also can perform large-scale, high-precision time measurement, ensuring wide applicability and high-precision detection capabilities.

[0043] In one embodiment, the pulse signal is processed by an amplifying delay circuit, a first amplifying circuit, and a second amplifying circuit respectively to obtain a first analog signal, a second analog signal, and a third analog signal, including: amplifying the pulse signal by a first amplifying factor by the amplifying delay circuit and delaying it according to a delay time to obtain a first analog signal; the delay time is less than the sum of a rise time and a fall time of the particle detector; amplifying the pulse signal by a second amplifying factor by the first amplifying circuit to obtain a second analog signal; the second amplifying factor is less than the first amplifying factor; amplifying the pulse signal by a third amplifying factor by the second amplifying circuit to obtain a third analog signal; the third amplifying factor is calculated by the maximum comparison voltage of the particle resolution module, the maximum value of the number of particles to be resolved, and the corresponding maximum amplitude.

[0044] In this embodiment, if Figure 2 The structural diagram of the signal processing module shown in the figure, the original signal input is the analog signal output of different particle detectors. Considering that the response characteristics of different types of particle detectors are different, and the response characteristics of the same particle detector to different numbers of particles are also different, the signal processing module needs to process the signals output to the particle number resolution module and the time digital conversion module differently. For the signal output to the particle resolution module, the maximum value N of the number of particles to be resolved must first be determined according to the actual test object. max And the corresponding maximum amplitude V max To achieve at least N max Particle number resolution, magnification A3 and the maximum comparison voltage V of the particle resolution module cmax Should meet:

[0045]

[0046] For the signal output to the time-to-digital conversion module, since the amplitude of the response characteristics of different particle numbers varies greatly, using a single threshold comparison rule will result in a large timing fluctuation, thus affecting the timing accuracy. r and the fall time τ d Basically unchanged, so the constant ratio timing method can be used for accurate timing. The constant ratio timing method requires two signals, including a small signal without delay and a large signal with delay. Therefore, the amplification factors A1, A2 and delay time τ of the two amplifier circuits in the signal processing module must meet the following requirements:

[0047] A2<A1 (2)

[0048] 0<τ<τ r +τ d (3)

[0049] In one embodiment, the particle number resolution module receives the third analog signal through a high-speed ADC acquisition circuit or a multi-threshold comparison circuit and performs particle number resolution.

[0050] In this embodiment, if Figure 3 The schematic diagram of the particle number resolution module is shown in the figure. For specific application fields such as laser imaging, high-energy physics, and quantum information, the signal response time is usually less than 100ns, and even less than 10ns for single-photon detection. To achieve accurate particle number resolution, high-speed ADC acquisition circuits or multi-threshold comparison circuits can be used to achieve particle number resolution, such as Figure 3 As shown, when using a high-speed ADC to build a particle number resolution module, its sampling rate must be at least twice the detector output response frequency. The module input signal is an analog signal amplified by the signal processing module, and the module output signal is a digital signal representing the number of particles. In this module, the output is a thermometer code. The comparison voltages of each level are determined based on the output voltage of the particle detector. The nth level comparison voltage should be greater than the amplified voltage of the n-1 particle response output but less than the amplified voltage of the n particle response output. Generally, the middle value of the two is taken. Specifically, the nth level comparison voltage V n The maximum number of particles to be resolved N max , corresponding to the maximum amplitude V max , magnification A3 must meet the following requirements:

[0051]

[0052] In one embodiment, the comparison circuit is used to perform constant ratio timing processing on the first analog signal and the second analog signal, and output a digital pulse signal; the time-to-digital conversion module includes a coarse timing unit and a fine timing unit.

[0053] In this embodiment, considering the difference in particle arrival time and the need for long-term measurement, a multi-level timing unit is used in the time-to-digital conversion module to achieve high-precision time measurement over a wide range. Figure 4 The schematic diagram of the time-to-digital conversion module shown in FIG. 1 is a schematic diagram of the time-to-digital conversion module. The time-to-digital conversion module mainly includes a comparison circuit and a time-to-digital conversion circuit. The input signal of the comparison circuit is two processed analog signals, specifically including a small signal S without delay and a large signal L with delay. The output signal is a fixed pulse width t w The specific basis for determining the generation of a digital pulse signal is:

[0054] V S ≤V L (5)

[0055] The input of the time-to-digital conversion circuit is a digital pulse signal, whose rising edge is used as a trigger signal for timing reading, and the output is a thermometer code representing time. Among them, the coarse timing unit is composed of a counter, and the fine timing unit is composed of a delay chain or a ring oscillator. The total duration of the fine timing unit must be greater than the clock signal period T clk The specific flow of the timing process is as follows: After the system is turned on, both the coarse and fine timing units start timing. When the rising edge of the clock signal arrives, the coarse timing unit count value is increased by 1, the fine timing unit count value is reset to zero and the timing starts again. When the rising edge of the effective signal pulse of the particle detector arrives, the coarse timing unit count value and the fine timing unit count value are read out to the processing unit, and the processing unit outputs the thermometer code after processing.

[0056] In one embodiment, the memory includes multiple storage words; each storage word includes a time information storage bit and a particle information storage bit; storing the time binary code and particle number binary code of the same pulse signal in the same storage word includes: writing the time binary code and particle number binary code of the current pulse signal in sequence into the corresponding same storage word according to the arrival order of the pulse signals.

[0057] In this embodiment, if Figure 5The structural diagram of the data processing and storage module shown in the figure, the data processing and storage module includes an encoder and a memory, the encoder input is the thermometer code of time and particle number, and the output is the binary code of time and particle number. The memory stores the binary code of the time information and particle number information of the same pulse signal in the same storage word for subsequent data processing and analysis. Since the data processing time of the particle number resolution module and the time digital conversion module is different, the encoding and storage writing are carried out using two independent paths to avoid interference and data loss during the data processing process. The storage bit width of the time information binary code and the quantity information binary code is determined according to actual needs. Since the input pulse signal of each detector will generate a time information binary code and a particle number information binary code, the storage of the two needs to be written into the storage word in sequence, that is, the nth time information binary code is written into the nth storage word, and the nth particle number information binary code is written into the nth storage word. The above storage rules can ensure that the time data and quantity data in the same storage word come from the same particle response pulse. The data processing and storage module improves storage efficiency and data synchronization by storing two types of data in the same storage word, and ensures the one-to-one correspondence between time and particle number information by writing in the order of pulse signals, and avoids interference and loss caused by data processing time differences through two independent paths. This allows the two types of information to be closely associated when stored, avoiding the synchronization and storage separation problems in traditional methods.

[0058] It should be understood that although Figure 1 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figure 1 At least part of the steps may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least part of the sub-steps or stages of other steps.

[0059] In one embodiment, Figure 6 As shown, a particle number resolution time digital conversion method is provided, comprising the following steps:

[0060] Step 602, receiving the pulse signal output by the particle detector, and processing the pulse signal through the amplification delay circuit, the first amplification circuit and the second amplification circuit respectively to obtain a first analog signal, a second analog signal and a third analog signal.

[0061] Step 604: Process the first analog signal and the second analog signal through a comparison circuit to output a digital pulse signal, and generate a time thermometer code representing time information according to the digital pulse signal through a time-to-digital conversion circuit.

[0062] Step 606 , receiving the third analog signal through a particle number resolution module and performing particle number resolution to generate a particle number thermometer code representing particle number information.

[0063] Step 608, receiving the time thermometer code and the particle number thermometer code through an encoder and converting them into a time binary code and a particle number binary code respectively, and storing the time binary code and the particle number binary code of the same pulse signal in the same storage word through a memory.

[0064] For the specific limitations on the particle number resolution time-to-digital conversion method, please refer to the limitations on the particle number resolution time-to-digital conversion system mentioned above, which will not be repeated here.

[0065] Each module in the above-mentioned particle number resolution time-to-digital conversion system can be implemented in whole or in part by software, hardware, or a combination thereof. Each of the above-mentioned modules can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute the operations corresponding to each of the above modules.

[0066] In one embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as follows: Figure 7 As shown. The computer device includes a processor, a memory, a network interface, a display screen and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a particle number resolution time-to-digital conversion method is implemented. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a key, trackball or touchpad set on the computer device housing, or an external keyboard, touchpad or mouse, etc.

[0067] Those skilled in the art will understand that Figure 7The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0068] In one embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the method in the above embodiment when executing the computer program.

[0069] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of the method in the above embodiment are implemented.

[0070] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0071] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A particle number resolution time-to-digital conversion system, characterized in that: The system comprises a signal processing module, a time-to-digital conversion module, a particle number resolution module and a data processing and storage module; the time-to-digital conversion module and the particle number resolution module are connected to the signal processing module and the data processing and storage module respectively; The signal processing module is connected to the particle detector, and is used to receive the pulse signal output by the particle detector, and process the pulse signal through the amplification delay circuit, the first amplification circuit and the second amplification circuit respectively to obtain the first analog signal, the second analog signal and the third analog signal; The time-to-digital conversion module includes a comparison circuit and a time-to-digital conversion circuit, wherein the comparison circuit is used to process the first analog signal and the second analog signal to output a digital pulse signal, and the time-to-digital conversion circuit is used to generate a time thermometer code representing time information according to the digital pulse signal; The particle number resolution module is used to receive the third analog signal and perform particle number resolution to generate a particle number thermometer code representing particle number information; The data processing and storage module includes an encoder and a memory. The encoder is used to receive the time thermometer code and the particle number thermometer code and convert them into a time binary code and a particle number binary code respectively. The memory is used to store the time binary code and the particle number binary code of the same pulse signal in the same storage word.

2. The particle number resolved time-to-digital conversion system according to claim 1, characterized in that: The processing of the pulse signal by the amplifying delay circuit, the first amplifying circuit, and the second amplifying circuit to obtain the first analog signal, the second analog signal, and the third analog signal comprises: Amplifying the pulse signal by a first amplification factor through an amplification delay circuit and delaying the pulse signal according to a delay time to obtain a first analog signal; the delay time is less than the sum of the rise time and the fall time of the particle detector; amplifying the pulse signal by a second amplification factor through the first amplification circuit to obtain a second analog signal; the second amplification factor is smaller than the first amplification factor; The pulse signal is amplified by a third amplification factor through the second amplification circuit to obtain a third analog signal; the third amplification factor is calculated based on the maximum comparison voltage of the particle resolution module, the maximum value of the number of particles to be resolved, and the corresponding maximum amplitude.

3. The particle number resolved time-to-digital conversion system according to claim 2, characterized in that: If the particle number resolution of the maximum number of particles to be resolved is to be achieved, the relationship between the third magnification and the maximum comparison voltage of the particle resolution module is: Among them, N max is the maximum number of particles to be resolved, V max N max The corresponding maximum amplitude, A3 is the third magnification, V cmax It is the maximum comparison voltage of the particle resolution module.

4. The particle number resolved time-to-digital conversion system according to claim 1, characterized in that: The comparison circuit is used to perform constant ratio timing processing on the first analog signal and the second analog signal, and output a digital pulse signal.

5. The particle number resolved time-to-digital conversion system according to claim 1, characterized in that: The time-to-digital conversion module includes a coarse timing unit and a fine timing unit.

6. The particle number resolved time-to-digital conversion system according to claim 1, characterized in that: The particle number resolution module receives the third analog signal through a high-speed ADC acquisition circuit or a multi-threshold comparison circuit and performs particle number resolution.

7. The particle number resolved time-to-digital conversion system according to claim 1, characterized in that: The memory includes a plurality of storage words; each storage word includes a time information storage bit and a particle information storage bit; The storing of the time binary code and the particle number binary code of the same pulse signal in the same storage word comprises: According to the arrival order of the pulse signals, the time binary code and the particle number binary code of the current pulse signal are sequentially written into the corresponding same storage word.

8. A method for applying to the particle number resolution time-to-digital conversion system according to any one of claims 1 to 7, characterized in that: The method comprises: Receive a pulse signal output by the particle detector, and process the pulse signal through the amplification delay circuit, the first amplification circuit, and the second amplification circuit respectively to obtain a first analog signal, a second analog signal, and a third analog signal; Processing the first analog signal and the second analog signal through the comparison circuit to output a digital pulse signal, and generating a time thermometer code representing time information according to the digital pulse signal through the time-to-digital conversion circuit; The particle number resolution module receives the third analog signal and performs particle number resolution to generate a particle number thermometer code representing particle number information; The encoder receives the time thermometer code and the particle number thermometer code and converts them into a time binary code and a particle number binary code respectively, and the memory stores the time binary code and the particle number binary code of the same pulse signal in the same storage word.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method described in claim 8 are implemented.

10. A readable storage medium having an executable program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method described in claim 8 are implemented.

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