An APD voltage adjustment method, system, device and storage medium

Abstract

The application relates to the technical field of APD device power supply, in particular to an APD voltage adjustment method, system and device and a storage medium, the method comprising the following steps: acquiring a first high-voltage adjustment control signal value at a first time; determining a photoelectric conversion response current digital signal value at the first time according to the first high-voltage adjustment control signal value; judging whether the photoelectric conversion response current digital signal value is smaller than a photoelectric conversion response current digital signal threshold value; if the photoelectric conversion response current digital signal value is not smaller than the photoelectric conversion response current digital signal threshold value, judging whether a first high-voltage adjustment control signal step quantity at the first time is 1; and if the first high-voltage adjustment control signal step quantity is not 1, adjusting the first high-voltage adjustment control signal value and the first high-voltage adjustment control signal step quantity to adjust the voltage of a target APD device. The application can improve the efficiency of determining the high-voltage adjustment control signal output voltage value corresponding to the APD device.

Description

Technical Field

[0001] This application relates to the technical field of power supply for APD devices, and more particularly to a method, system, device, and storage medium for adjusting the voltage of an APD device. Background Technology

[0002] In optical module applications, especially for long-distance transmission and high-speed communication systems requiring high receiver sensitivity, APD devices are typically used to provide higher sensitivity to meet these requirements. The APD's supply voltage directly affects this sensitivity. Currently, the supply voltage of APD devices is primarily determined by gradually increasing the high-voltage adjustment control signal output voltage of the APD device using sensitivity testing equipment (bit error rate meter). Simultaneously, the number of bit errors reported by the bit error rate meter needs to be monitored in real time to obtain the minimum error count and ensure sensitivity. However, this method requires gradually acquiring the error count, making it difficult to improve testing speed and resulting in low efficiency in determining the optimal operating voltage value for the corresponding APD device.

[0003] Therefore, how to improve the efficiency of determining the output voltage value of the high-voltage adjustment control signal corresponding to the APD device is a technical problem that urgently needs to be solved. Summary of the Invention

[0004] This application provides an APD voltage adjustment method, system, device, and storage medium, which can improve the efficiency of determining the output voltage value of the high voltage adjustment control signal corresponding to the APD device.

[0005] The first aspect of this application provides a method for adjusting the voltage of an APD (Active Device), applied to a target APD device, the method comprising: Obtain the first high-voltage adjustment control signal value at the first moment; Based on the first high-voltage adjustment control signal value, determine the digital signal value of the photoelectric conversion response current at the first moment; Determine whether the value of the photoelectric conversion response current digital signal is less than the threshold value of the photoelectric conversion response current digital signal, wherein the threshold value of the photoelectric conversion response current digital signal is the value of the photoelectric conversion response current digital signal of the target APD device during an avalanche; If the value of the digital signal of the photoelectric conversion response current is not less than the threshold value of the digital signal of the photoelectric conversion response current, then determine whether the step size of the first high voltage adjustment control signal at the first moment is 1; If the step size of the first high voltage adjustment control signal is not 1, then the value of the first high voltage adjustment control signal and the step size of the first high voltage adjustment control signal are adjusted to adjust the voltage of the target APD device.

[0006] By adopting the above technical solution, it is determined whether the current voltage value is sufficient to cause the APD device to avalanche multiplication. If it is not less than 1, it is determined whether the current step size is 1 to determine whether the amplification is accurate and to avoid excessive supply voltage. If the step size is not 1, the step size is adjusted accordingly. In layman's terms, it first uses a large step size for initial matching, and then adjusts the step size for precise matching, thereby improving the efficiency of determining the output voltage value of the high voltage adjustment control signal corresponding to the APD device.

[0007] Optionally, the method further includes: If the digital signal value of the photoelectric conversion response current is less than the threshold value of the digital signal of the photoelectric conversion response current, then the value of the first high voltage adjustment control signal is adjusted according to the step amount of the first high voltage adjustment control signal to obtain the target APD high voltage adjustment control signal value.

[0008] By adopting the above technical solution, if the digital signal value of the photoelectric conversion response current is less than the threshold value of the digital signal value of the photoelectric conversion response current, that is, the current power supply voltage is still insufficient to avalanche multiplication of the APD device, the APD high voltage adjustment control signal value is increased according to the current step amount to achieve the power supply voltage value at which the APD device can avalanche.

[0009] Optionally, the method further includes: Determine whether the target APD high-voltage adjustment control signal value is not greater than the maximum value of the high-voltage adjustment control signal; If the target APD high voltage adjustment control signal value is greater than the maximum value of the high voltage adjustment control signal, the target APD device is determined to be abnormal, and a corresponding abnormal alarm signal is sent.

[0010] By adopting the above technical solution, if the adjusted APD high voltage adjustment control signal value exceeds the preset maximum value of the APD high voltage adjustment control signal, it is determined that the device is damaged. In this case, a corresponding abnormal alarm signal will be sent and the APD output voltage adjustment will be terminated.

[0011] Optionally, before the step of obtaining the first high-voltage adjustment control signal value at the first moment, the method includes: Obtain the setting parameters corresponding to the target APD device. The APD parameter settings include parameter threshold values ​​and the initial high voltage adjustment control signal step size. The minimum value of the parameter threshold is determined to be the value of the APD high-voltage adjustment control signal at the initial moment; The maximum value of the parameter threshold is determined to be the maximum value of the high-voltage adjustment control signal.

[0012] By adopting the above technical solution, the minimum value of the preset parameter threshold is used as the starting value to avoid the starting value being too small and to improve the speed at which the APD voltage is adjusted to the corresponding avalanche voltage; the maximum value of the parameter threshold is used to set the upper limit. If the upper limit is exceeded, it indicates that there is a problem with the device and the adjustment is terminated; the step size of the initial high voltage adjustment control signal can also speed up the boost to the avalanche point of the APD device.

[0013] Optionally, the step of adjusting the value of the first high-voltage adjustment control signal and the step size of the first high-voltage adjustment control signal includes: If the step size of the first high-voltage adjustment control signal is not 1, then the first high-voltage adjustment control signal is adjusted according to the step size of the high-voltage adjustment control signal to obtain the second high-voltage adjustment control signal at the next moment. The step size of the first high-voltage adjustment control signal is halved to obtain the step size of the second high-voltage adjustment control signal at the next moment.

[0014] By adopting the above technical solution, a larger step size is first used to make the supply voltage reach the avalanche multiplication voltage value of the APD device. However, since the voltage value may be too high, it is necessary to reduce the voltage value to below the avalanche point first, and then halve the step size to increase the supply voltage value again until the final step size is 1, at which point a precise high-voltage adjustment control signal output value is output.

[0015] Optionally, after the step of halving the step size of the first high-voltage adjustment control signal to obtain the step size of the second high-voltage adjustment control signal at the next moment, the method further includes: The second high voltage adjustment control signal quantity at the next moment is determined based on the first high voltage adjustment control signal quantity and the first high voltage adjustment control signal step quantity. Determine whether the second high-voltage adjustment control signal quantity is less than the maximum value of the high-voltage adjustment control signal; If the second high voltage adjustment control signal is less than the maximum value of the high voltage adjustment control signal, then the step of judging whether the value of the photoelectric conversion response current digital signal is less than the threshold value of the photoelectric conversion response current digital signal is repeated until the step amount of the first high voltage adjustment control signal is 1. If the step size of the first high-voltage adjustment control signal is 1, then the high-voltage adjustment control signal value corresponding to the step size of the first high-voltage adjustment control signal is determined to be the output value of the high-voltage adjustment control signal.

[0016] By adopting the above technical solution, the adjustment steps of the high voltage adjustment control signal quantity and the high voltage adjustment control signal step quantity are repeated until the first high voltage adjustment control signal step quantity is adjusted to 1. The high voltage adjustment control signal value at the corresponding moment is then determined to be the high voltage adjustment control signal output value, thereby completing the voltage adjustment.

[0017] Optionally, after the step of determining the high-voltage adjustment control signal value corresponding to the first high-voltage adjustment control signal step if the first high-voltage adjustment control signal step is 1, the method includes: The high-voltage adjustment control signal output value is adjusted to the actual high-voltage adjustment control signal output value according to the preset calibration value.

[0018] By adopting the above technical solution, the actual output value of the high voltage adjustment control signal is obtained by subtracting the corresponding calibration value from the high voltage adjustment control signal output value determined in the above steps, so as to ensure that the APD device operates at a safe and stable voltage point.

[0019] A second aspect of this application provides an APD voltage adjustment system, comprising: The high-voltage adjustment control signal acquisition module is used to acquire the first high-voltage adjustment control signal value at the first moment; The photoelectric conversion response current digital signal determination module is used to determine the photoelectric conversion response current digital signal value at the first moment based on the first high voltage adjustment control signal value; The first judgment module is used to determine whether the value of the photoelectric conversion response current digital signal is less than the threshold value of the photoelectric conversion response current digital signal, wherein the threshold value of the photoelectric conversion response current digital signal is the value of the photoelectric conversion response current digital signal of the target APD device during an avalanche. The second judgment module is used to determine whether the step amount of the first high voltage adjustment control signal at the first moment is 1 if the value of the digital signal of the photoelectric conversion response current is not less than the threshold value of the digital signal of the photoelectric conversion response current. The APD parameter adjustment module is used to adjust the value of the first high voltage adjustment control signal and the step size of the first high voltage adjustment control signal if the step size of the first high voltage adjustment control signal is not 1, so as to adjust the voltage of the target APD device.

[0020] A third aspect of this application provides an apparatus including a memory and a processor, the memory storing a computer program that can be loaded by the processor and execute the above-described APD voltage adjustment method.

[0021] The fourth aspect of this application provides a storage medium storing a computer program that can be loaded by a processor and execute the above-described APD voltage adjustment method.

[0022] In summary, this application includes at least one of the following beneficial effects: 1. Determine if the current voltage value is sufficient to cause the APD device to avalanche multiplication. If it is not less than 1, determine if the current step size is 1 to ensure the amplification is accurate and avoid excessive supply voltage. If the step size is not 1, adjust the step size accordingly. In simple terms, first use a large step size for initial matching, and then adjust the step size for precise matching, thereby improving the efficiency of determining the output voltage value of the high voltage adjustment control signal corresponding to the APD device.

[0023] 2. Obtain the minimum value of the preset parameter threshold as the starting value to avoid the starting value being too small and to improve the speed of APD voltage adjustment to the corresponding avalanche voltage; the maximum value of the parameter threshold is used to set the upper limit. If the upper limit is exceeded, it indicates that there is a problem with the device and the adjustment is terminated; the step size of the initial high voltage adjustment control signal can also speed up the boost to the avalanche point of the APD device.

[0024] 3. If the adjusted APD high voltage adjustment control signal value exceeds the preset maximum value of the APD high voltage adjustment control signal, it is determined that the device is damaged. In this case, a corresponding abnormal alarm signal will be sent and the APD output voltage adjustment will be terminated. Attached Figure Description

[0025] Figure 1 This is a modular schematic diagram of the APD voltage adjustment device provided in the embodiments of this application.

[0026] Figure 2 This is a schematic flowchart of the APD voltage adjustment method provided in the embodiments of this application; Figure 3 This is a schematic diagram of the virtual structure of the APD voltage adjustment system provided in this application; Detailed Implementation The following embodiments will help those skilled in the art to further understand the function of this application, but do not limit this application in any way. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this application. These all fall within the protection scope of this application.

[0027] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0028] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0029] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0030] As used in this application specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [the described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [the described condition or event] is detected," or "in response to detection of [the described condition or event]."

[0031] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0033] To make the purpose, technical solution and advantages of this application clearer, the APD voltage adjustment method of this application will be described below from the perspective of the APD voltage adjustment device. The APD voltage adjustment device can be an electronic device, such as a mobile phone terminal, computer terminal and other devices.

[0034] The present application will be further described in detail below with reference to the accompanying drawings.

[0035] Reference Figure 1 , Figure 1This is a modular schematic diagram of the APD voltage adjustment device provided in the embodiments of this application, including an optical module and an electronic device with software installed for automatically adjusting the APD voltage value. The optical module integrates an APD device for detecting optical signals and converting the optical signals into electrical signals, a high-voltage output unit for digital-to-analog conversion, and a current acquisition unit for analog-to-digital conversion.

[0036] Regarding electronic devices: The electronic devices are equipped with software for automatically adjusting the APD voltage value, namely the APD power supply voltage adjustment program. The APD voltage adjustment method described in this application is mainly adjusted through this adjustment program.

[0037] About APD devices: An APD device, or APD avalanche photodiode, is a pn junction-type photodetector diode that utilizes the avalanche multiplication effect of charge carriers to amplify the photoelectric signal and improve detection sensitivity. A large reverse bias voltage is applied during operation to achieve the avalanche multiplication state.

[0038] Regarding the high-voltage output unit: The high-voltage output unit, also known as the digital-to-analog converter unit, converts the digital signal value of the photoelectric conversion response current set by the APD power supply voltage debugging program into a high-voltage adjustment control signal voltage value and outputs it to the APD device.

[0039] Regarding the current acquisition unit: The current acquisition unit, also known as the analog-to-digital converter, is used to acquire the current supply voltage value of the APD device and convert it into a digital signal value of the photoelectric conversion response current. This digital signal value is then input into the aforementioned APD supply voltage debugging program. The debugging program determines whether the APD device has reached the corresponding avalanche point based on the acquired digital signal value of the photoelectric conversion response current. If it has not reached the avalanche point, the supply voltage of the APD device is increased through the aforementioned high-voltage output unit. If it has reached the avalanche point, the parameters of the APD device are adjusted accordingly to ensure that the supply voltage accurately reaches the avalanche point. The parameter adjustment is explained in detail in the adjustment method below: Reference Figure 2 , Figure 2 This is a schematic flowchart of an APD voltage adjustment method provided in an embodiment of this application. The method includes the following steps: In step S1, the first high-voltage adjustment control signal value at the first moment is obtained.

[0040] Specifically, the first moment is the current moment. The power supply voltage of the APD device at the current moment is obtained to determine the APD high voltage adjustment control signal value. The APD high voltage adjustment control signal value is the DAC value at the current moment. It can be understood that D is the digital signal of photoelectric conversion response current, A is the high voltage adjustment control signal, DAC refers to the conversion of the digital signal of photoelectric conversion response current into the high voltage adjustment control signal, and the DAC value refers to the voltage value of the analog output signal.

[0041] In step S2, the digital signal value of the photoelectric conversion response current at the first moment is determined based on the value of the first high voltage adjustment control signal.

[0042] Specifically, the high-voltage adjustment control signal value of the APD includes the current supply voltage and current of the APD device at the current moment. Through the current acquisition unit, the photoelectric conversion response current digital signal representation of the current supply voltage of the APD device at the current moment can be obtained based on the current value of the APD, that is, the photoelectric conversion response current digital signal value.

[0043] In step S3, it is determined whether the value of the photoelectric conversion response current digital signal is less than the photoelectric conversion response current digital signal threshold, wherein the photoelectric conversion response current digital signal threshold is the value of the photoelectric conversion response current digital signal corresponding to the target APD device during an avalanche.

[0044] Specifically, the digital signal value of the photoelectric conversion response current, determined by acquiring the current value of the APD device, is compared with a threshold value to determine whether the current supply voltage has reached or exceeded the avalanche point of the corresponding APD device. The threshold value can be obtained by the circuit designer from the magnitude of the dark current of the APD device at the avalanche point (typically 10uA), and the corresponding digital signal value of the photoelectric conversion response current is used as the threshold value. Furthermore, to avoid deviations between the dark current and 10uA, or to improve accuracy, the corresponding current value of the target APD device at the avalanche point can be acquired and recorded during the initial power supply. This is explained in detail below: Obtain the avalanche current signal value corresponding to the avalanche of the target APD device; The threshold value of the photoelectric conversion response current digital signal is determined based on the avalanche current signal value.

[0045] Specifically, on the one hand, the VBR (Breakdown voltage) data for each product can be provided by the APD device supplier, and the corresponding avalanche current signal value can be determined based on the VBR data, that is, the threshold of the digital signal of the photoelectric conversion response current can be determined; on the other hand, the corresponding avalanche current signal value can be determined by means of a bit error rate tester or other means during the initial voltage matching, and the subsequent automatic adjustment process is handled by the APD voltage adjustment program in the embodiments of this application.

[0046] In one possible scenario, if the digital signal value of the photoelectric conversion response current is less than the threshold value of the digital signal of the photoelectric conversion response current, then the value of the first high voltage adjustment control signal is adjusted according to the step amount of the first high voltage adjustment control signal to obtain the target APD high voltage adjustment control signal value.

[0047] Specifically, after the collected APD device current is converted into a digital signal of photoelectric conversion response current through the analog-to-digital conversion module, the corresponding digital signal value of photoelectric conversion response current is compared with the determined digital signal threshold of photoelectric conversion response current. If the digital signal value of photoelectric conversion response current is less than the digital signal threshold of photoelectric conversion response current, it is determined that the APD device at the current moment has not yet reached the avalanche point of the target APD device, and it is necessary to continue to increase the voltage. That is, according to the step amount of the high voltage adjustment control signal in the current APD parameter setting, the current APD high voltage adjustment control signal value is increased. After adjustment, a new judgment is made until the digital signal value of photoelectric conversion response current is not less than the digital signal threshold of photoelectric conversion response current.

[0048] More specifically, in the judgment after adjusting the APD high-voltage adjustment control signal value, in order to avoid malfunction or damage to the APD device, the following steps are also included: Determine whether the target APD high-voltage adjustment control signal value is not greater than the maximum value of the high-voltage adjustment control signal; If the target APD high voltage adjustment control signal value is greater than the maximum value of the high voltage adjustment control signal, the target APD device is determined to be abnormal, and a corresponding abnormal alarm signal is sent.

[0049] Specifically, the maximum value of the APD high-voltage adjustment control signal is the maximum value of the APD parameter threshold in the preset APD parameters. Except in abnormal situations, the APD high-voltage adjustment control signal value cannot exceed the maximum value of the APD high-voltage adjustment control signal. Therefore, in this case, an error will be reported through an abnormal alarm signal. The abnormal alarm information can be text information, audio information, LED display information, etc., and at the same time, the APD voltage adjustment process will be terminated.

[0050] More specifically, the APD parameter threshold value is set before voltage adjustment begins. The following is a detailed explanation of the steps before the program starts: Obtain the setting parameters corresponding to the target APD device. The APD parameter settings include parameter threshold values ​​and the initial high voltage adjustment control signal step size. The minimum value of the parameter threshold is determined to be the value of the APD high-voltage adjustment control signal at the initial moment; The maximum value of the parameter threshold is determined to be the maximum value of the high-voltage adjustment control signal.

[0051] Specifically, before the program starts, set the parameter threshold values ​​and the initial step size. The meaning of the parameter threshold values ​​will not be elaborated here. However, the initial high-voltage adjustment control signal step size should be set reasonably and relatively large. This is because it is necessary to quickly increase the step size from the initial APD high-voltage adjustment control signal value to the avalanche point of the APD device, using the initial APD high-voltage adjustment control signal step size as the unit, and then adjust accordingly to improve accuracy. Furthermore, it should be noted that before starting the APD voltage adjustment, it should be ensured that there is no input light connected to the corresponding APD device.

[0052] In step S4, if the value of the photoelectric conversion response current digital signal is not less than the threshold value of the photoelectric conversion response current digital signal, then it is determined whether the step size of the first high voltage adjustment control signal is 1.

[0053] Specifically, if the digital signal value of the photoelectric conversion response current is not less than the threshold value of the digital signal value of the photoelectric conversion response current, then it is determined that the APD device has reached the avalanche point at the current moment. However, since the power supply voltage of the APD device at the current moment may reach the avalanche point through a large step, if the step is large, the voltage may be too high. Therefore, it is necessary to further judge the step of the first high voltage adjustment control signal. The two different situations will be explained in steps S51 and S52 below.

[0054] In step S5, if the step size of the first high voltage adjustment control signal is not 1, the value of the first high voltage adjustment control signal and the step size of the first high voltage adjustment control signal are adjusted to adjust the voltage of the target APD device.

[0055] Specifically, a step size of 1 is the minimum precision value set in this application, and can be adjusted according to actual conditions. If the step size of the first high-voltage adjustment control signal is not 1, and the avalanche point of the target APD device has been reached at the current moment, the corresponding supply voltage of the APD device may be too high. Therefore, it is necessary to adjust the current APD high-voltage adjustment control signal value and the step size of the high-voltage adjustment control signal to make the APD operating voltage closer to the operating voltage value of the avalanche point. The method for adjusting the current APD high-voltage adjustment control signal value and the step size of the high-voltage adjustment control signal is described in detail below: If the step size of the first high-voltage adjustment control signal is not 1, then the first high-voltage adjustment control signal is adjusted according to the step size of the high-voltage adjustment control signal to obtain the second high-voltage adjustment control signal at the next moment. The step size of the first high-voltage adjustment control signal is halved to obtain the step size of the second high-voltage adjustment control signal at the next moment.

[0056] Specifically, the current moment is defined as the first moment, and the next moment after the first moment is the second moment. In layman's terms, the adjustment kernel of this application first rapidly increases the voltage of the APD device by a large step size to above the avalanche point, and then gradually reduces the step size to 1 by reducing the step size. At the same time, the high voltage adjustment control signal of the APD is adjusted accordingly. Halving the step size is only one possible embodiment in this application.

[0057] For example, in digital terms, suppose the target number is 100, the initial number is 50, and the initial step size is 8, meaning the minimum value exceeding 100 after stepping is 106. In this case, adjustments are needed. The approach in this application is to first subtract the current step value from 106, then halve the current step size to 4, repeating this process until the final value is 99 + 1 = 100, thus improving the accuracy of the obtained number. This example can be analogized to the supply voltage of APD devices, which require high sensitivity.

[0058] More specifically, after the step of halving the first high-voltage adjustment control signal step to obtain the second high-voltage adjustment control signal step at the next moment, the method further includes the following steps: The second high voltage adjustment control signal quantity at the next moment is determined based on the first high voltage adjustment control signal quantity and the first high voltage adjustment control signal step quantity. Determine whether the second high-voltage adjustment control signal quantity is less than the maximum value of the high-voltage adjustment control signal; If the second high voltage adjustment control signal is less than the maximum value of the high voltage adjustment control signal, then the step of judging whether the value of the photoelectric conversion response current digital signal is less than the threshold value of the photoelectric conversion response current digital signal is repeated until the step amount of the first high voltage adjustment control signal is 1. If the step size of the first high-voltage adjustment control signal is 1, then the high-voltage adjustment control signal value corresponding to the step size of the first high-voltage adjustment control signal is determined to be the output value of the high-voltage adjustment control signal.

[0059] Specifically, if the step size of the first high-voltage adjustment control signal is 1, and the digital signal of the photoelectric conversion response current corresponding to the current APD high-voltage adjustment control signal is above the threshold value of the digital signal of the photoelectric conversion response current corresponding to the avalanche point, then it is confirmed that the current APD high-voltage adjustment control signal value has been adjusted as the output value of the high-voltage adjustment control signal. However, due to deviations or temperature drift caused by factors such as manufacturing process and temperature changes, in practical applications, it is necessary to perform correction before outputting. The following is a detailed explanation: The high-voltage adjustment control signal output value is adjusted to the actual high-voltage adjustment control signal output value according to the preset calibration value.

[0060] Specifically, in order to ensure the stable operation of the APD device and obtain the performance that matches the expectation, and to avoid the deviation or drift caused by factors such as manufacturing process and temperature change from affecting the working state or performance of the APD device, the optimal working voltage of the APD device after adjustment needs to be subtracted by a calibration value for correction. The final high voltage adjustment control signal value is the actual high voltage adjustment control signal output value for actual application.

[0061] In another aspect, this application discloses an APD voltage adjustment system; please refer to [link to relevant documentation]. Figure 3 , Figure 3 This is a virtual structural diagram of the APD voltage adjustment system provided in this application. The APD voltage adjustment system includes: The high-voltage adjustment control signal acquisition module 100 is used to acquire the first high-voltage adjustment control signal value at the first moment. The photoelectric conversion response current digital signal determination module 200 is used to determine the photoelectric conversion response current digital signal value at the first moment based on the first high voltage adjustment control signal value. The first judgment module 300 is used to judge whether the value of the photoelectric conversion response current digital signal is less than the threshold value of the photoelectric conversion response current digital signal, wherein the threshold value of the photoelectric conversion response current digital signal is the value of the photoelectric conversion response current digital signal corresponding to the target APD device during an avalanche. The second judgment module 400 is used to determine whether the step amount of the first high voltage adjustment control signal at the first moment is 1 if the value of the digital signal of the photoelectric conversion response current is not less than the threshold value of the digital signal of the photoelectric conversion response current. The APD parameter adjustment module 500 is used to adjust the value of the first high voltage adjustment control signal and the step amount of the first high voltage adjustment control signal if the step amount of the first high voltage adjustment control signal is not 1, so as to adjust the voltage of the target APD device.

[0062] Specific limitations regarding the APD voltage adjustment system can be found in the limitations of the APD voltage adjustment method described above, and will not be repeated here. Each module in the aforementioned APD voltage adjustment system can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in hardware or independent of the processor in the computer device, or stored in software in the computer device's memory, so that the processor can call and execute the corresponding operations of each module.

[0063] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0064] The APD voltage adjustment method provided in this application embodiment can be applied to terminal devices such as electronic devices, computers, wearable devices, vehicle devices, tablet computers, laptops, netbooks, personal digital assistants (PDAs), augmented reality (AR) / virtual reality (VR) devices, and mobile phones. This application embodiment does not impose any restrictions on the specific type of terminal device.

[0065] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps described in the various embodiments of the above methods.

[0066] This application provides a computer program product that, when run on a mobile terminal, enables the mobile terminal to implement the steps described in the various embodiments of the above methods.

[0067] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments of this application can be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. A computer-readable medium can include at least: any entity or device capable of carrying computer program code to a photographing device / terminal device, a recording medium, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium. Examples include USB flash drives, portable hard drives, magnetic disks, or optical disks. In some jurisdictions, according to legislation and patent practice, computer-readable media cannot be electrical carrier signals or telecommunication signals.

[0068] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0069] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0070] In the embodiments provided in this application, it should be understood that the disclosed apparatus / network devices and methods can be implemented in other ways. For example, the apparatus / network device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0071] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0072] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A method for adjusting the voltage of an APD, characterized in that, Applied to a target APD device, the method includes: Obtain the parameter settings corresponding to the target APD device, including parameter threshold values ​​and the initial high-voltage adjustment control signal step size; determine the minimum value of the parameter threshold values ​​as the initial APD high-voltage adjustment control signal value; determine the maximum value of the parameter threshold values ​​as the maximum value of the high-voltage adjustment control signal. Under the condition that the target APD device has no input light, the first high voltage adjustment control signal value at the first moment is obtained, and the step size of the first high voltage adjustment control signal is the step size of the high voltage adjustment control signal at the initial moment; based on the first high voltage adjustment control signal value, the digital signal value of the photoelectric conversion response current at the first moment is determined; it is determined whether the digital signal value of the photoelectric conversion response current is less than the digital signal threshold of the photoelectric conversion response current, and the digital signal threshold of the photoelectric conversion response current is the digital signal value of the photoelectric conversion response current corresponding to the target APD device during avalanche; If the digital signal value of the photoelectric conversion response current is less than the digital signal threshold of the photoelectric conversion response current, then the value of the first high-voltage adjustment control signal is adjusted according to the step amount of the first high-voltage adjustment control signal to obtain the target APD high-voltage adjustment control signal value; Determine whether the target APD high voltage adjustment control signal value is not greater than the maximum value of the high voltage adjustment control signal; if the target APD high voltage adjustment control signal value is greater than the maximum value of the high voltage adjustment control signal, then determine that the target APD device is abnormal and send a corresponding abnormal alarm signal; If the value of the digital signal of the photoelectric conversion response current is not less than the threshold value of the digital signal of the photoelectric conversion response current, then determine whether the step size of the first high voltage adjustment control signal at the first moment is 1; If the step size of the first high-voltage adjustment control signal is not 1, then the value of the first high-voltage adjustment control signal is adjusted according to the step size to obtain the value of the second high-voltage adjustment control signal at the next moment; the step size of the first high-voltage adjustment control signal is halved to obtain the step size of the second high-voltage adjustment control signal at the next moment. The second high-voltage adjustment control signal value at the next moment is determined based on the first high-voltage adjustment control signal value and the first high-voltage adjustment control signal step size; it is determined whether the second high-voltage adjustment control signal value is less than the maximum value of the high-voltage adjustment control signal; if the second high-voltage adjustment control signal value is less than the maximum value of the high-voltage adjustment control signal, the step of determining whether the digital signal value of the photoelectric conversion response current is less than the threshold value of the photoelectric conversion response current is repeated until the first high-voltage adjustment control signal step size is 1; If the step size of the first high-voltage adjustment control signal is 1, then the high-voltage adjustment control signal value corresponding to the step size of the first high-voltage adjustment control signal is determined to be the high-voltage adjustment control signal output value; according to the preset calibration value, the high-voltage adjustment control signal output value is adjusted to the actual high-voltage adjustment control signal output value.

2. An adjustment system based on the APD voltage adjustment method according to claim 1, characterized in that, include: The parameter setting module is used to obtain the parameter settings corresponding to the target APD device and determine the initial value according to the parameter threshold value; The photoelectric conversion response current digital signal threshold judgment module is used to determine whether the value of the photoelectric conversion response current digital signal is less than the photoelectric conversion response current digital signal threshold when the target APD device has no input light access. The photoelectric conversion response current digital signal threshold is the value of the photoelectric conversion response current digital signal of the target APD device during an avalanche. A high-voltage adjustment control signal acquisition module is used to acquire the value of the first high-voltage adjustment control signal at a first moment; The photoelectric conversion response current digital signal determination module is used to determine the photoelectric conversion response current digital signal value at the first moment based on the first high voltage adjustment control signal value; The first judgment module is used to determine whether the value of the photoelectric conversion response current digital signal is less than the threshold value of the photoelectric conversion response current digital signal, wherein the threshold value of the photoelectric conversion response current digital signal is the value of the photoelectric conversion response current digital signal of the target APD device during an avalanche. The anomaly detection module is used to determine whether the target APD high-voltage adjustment control signal value is greater than the maximum value of the high-voltage adjustment control signal, and to send an anomaly alarm signal when the limit is exceeded. The second judgment module is used to determine whether the step amount of the first high voltage adjustment control signal at the first moment is 1 if the value of the digital signal of the photoelectric conversion response current is not less than the threshold value of the digital signal of the photoelectric conversion response current. The APD parameter adjustment module is used to adjust the value of the first high-voltage adjustment control signal and the step size of the first high-voltage adjustment control signal if the step size of the first high-voltage adjustment control signal is not 1, so as to adjust the voltage of the target APD device. The APD parameter adjustment module is used to adjust the value of the first high-voltage adjustment control signal according to the step amount of the first high-voltage adjustment control signal if the step amount of the first high-voltage adjustment control signal is not 1, so as to obtain the value of the second high-voltage adjustment control signal at the next moment, and halve the step amount of the first high-voltage adjustment control signal to obtain the step amount of the second high-voltage adjustment control signal at the next moment. The high-voltage adjustment control signal output module is used to determine the high-voltage adjustment control signal value corresponding to the first high-voltage adjustment control signal step if the first high-voltage adjustment control signal step is 1, and adjust the high-voltage adjustment control signal output value to the actual high-voltage adjustment control signal output value according to the preset calibration value.

3. An APD voltage adjustment device, characterized in that, It includes a memory and a processor, the memory storing a computer program that can be loaded by the processor and executed as described in claim 1 for adjusting the APD voltage.

4. A storage medium, characterized in that, The computer program is stored that can be loaded by a processor and execute the APD voltage adjustment method as described in claim 1.

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