Method, device and electronic equipment for extending dynamic measurement range of a system

Abstract

The application discloses a method, device and electronic equipment for expanding a dynamic measurement range of a system, and relates to the field of signal detection. The method is applied to an OCT detector, and the method comprises the following steps: after an excitation source emits a detection light beam to a measured object, an echo signal is acquired, the echo signal comprises reflectivity, scattering rate, time delay and reflected light intensity; echo power corresponding to the echo signal is calculated; a time sensitivity gain curve is generated according to the echo power; and the emission power of the excitation source is adjusted based on a time-power curve generated by the time sensitivity gain curve. According to the technical scheme of the application, the emission power of the excitation source is continuously controlled according to the time sensitivity gain curve, so that the signal intensity at different positions in the depth direction of the measured object is adjusted, and the dynamic measurement range of the OCT system is expanded.

Description

Technical Field

[0001] This application relates to the technical field of signal detection, specifically to a method, apparatus, and electronic device for extending the dynamic measurement range of a system. Background Technology

[0002] With the rapid development of OCT technology, it has been widely used in the field of ophthalmology due to its non-invasive, high-resolution, radiation-free, high-sensitivity, and real-time imaging characteristics, including retinal imaging and disease diagnosis.

[0003] Currently, when using OCT technology to diagnose eye diseases, the OCT device emits detection light into the patient's eyes. When the detection light interacts with the eye tissue, phenomena such as reflection, scattering, and refraction occur, generating echo signals. At this time, the OCT device collects these echo signals, and finally, by processing and analyzing the collected echo signals, high-resolution images are obtained to help medical staff diagnose eye diseases.

[0004] However, in commonly used OCT systems, measurements are usually performed by acquiring analog signals through analog-to-digital converters. Due to the different objects being measured, the analog signals returned by the objects have a large dynamic range, which can cause weak signals to be undetectable and strong signals to exceed the threshold of the analog-to-digital converter, resulting in distortion and the inability to obtain the correct signal.

[0005] Therefore, there is an urgent need for a method, device, and electronic equipment to extend the dynamic measurement range of the system. Summary of the Invention

[0006] This application provides a method, apparatus, and electronic device for extending the dynamic measurement range of a system. By continuously controlling the transmission power of the excitation source according to the time sensitivity gain curve, the signal intensity at different positions in the depth direction of the object being measured is adjusted, thereby extending the dynamic measurement range of the OCT system.

[0007] In a first aspect, this application provides a method for extending the dynamic measurement range of a system, applied to an OCT detector. The method includes: after an excitation source emits detection light towards the object under test, acquiring an echo signal, the echo signal including reflectivity, scattering rate, time delay, and reflected light intensity; calculating the echo power corresponding to the echo signal; generating a time sensitivity gain curve based on the echo power; and adjusting the emission power of the excitation source based on the time-power curve generated by the time sensitivity gain curve.

[0008] By adopting the above technical solution, the OCT detector calculates the echo power of the echo signal and generates a time sensitivity gain curve based on the echo power, thereby obtaining the measurement results of the tissue structure of the test object at different depths. Then, based on the time sensitivity gain curve, the emission power of the excitation source is adjusted to adjust the signal intensity at different positions in the depth direction of the test object, enhancing the signal intensity of weak signals that were not detected in the measurement results and weakening the signal intensity of strong signals that were not detected in the measurement results. This expands the dynamic measurement range of the OCT system, improves the signal-to-noise ratio of the system, and achieves more accurate measurements.

[0009] Secondly, this application provides a device for extending the dynamic measurement range of a system. The device is an OCT detector, which includes an acquisition module and a processing module, wherein: The acquisition module is used to acquire the echo signal after the excitation source emits detection light to the object under test. The echo signal includes reflectivity, scattering rate, time delay, and intensity of reflected light. The processing module is used to calculate the echo power corresponding to the echo signal; generate a time sensitivity gain curve based on the echo power; and adjust the transmission power of the excitation source based on the time-power curve generated by the time sensitivity gain curve.

[0010] By adopting the above technical solution, the OCT detector calculates the echo power of the echo signal and generates a time sensitivity gain curve based on the echo power, thereby obtaining the measurement results of the tissue structure of the test object at different depths. Then, based on the time sensitivity gain curve, the emission power of the excitation source is adjusted to adjust the signal intensity at different positions in the depth direction of the test object, thereby enhancing the signal intensity of weak signals that were not detected in the measurement results and weakening the signal intensity of strong signals that were not detected in the measurement results. This expands the dynamic measurement range of the OCT system, improves the signal-to-noise ratio of the system, and achieves more accurate measurements.

[0011] Optionally, the acquisition module is used to perform IV conversion on the echo signal to obtain a voltage signal; acquire the detector resistance and detector sensitivity of the OCT detector; and the processing module is used to calculate the echo power based on the voltage signal, detector resistance, and detector sensitivity.

[0012] By adopting the above technical solution, the echo signal is converted into a voltage signal, and the echo power is obtained based on the voltage signal, detector resistance, and detector sensitivity, thereby accurately reflecting the reflection and scattering of the object under test, and thus achieving more accurate depth analysis.

[0013] Optionally, before calculating the echo power corresponding to the echo signal, the method includes: an acquisition module for acquiring a standard echo signal of a standard reflector, wherein the standard reflector is a reference object for calibrating the performance of the optical system; a processing module for calculating the reflection power based on the standard echo signal; acquiring a reference power corresponding to the reflection power, wherein the reference power is the input power when the excitation source sends a probe beam to the standard reflector; and calculating the detector sensitivity based on the reflection power and the reference power using a preset sensitivity algorithm.

[0014] By adopting the above technical solution, the standard echo signal of the standard reflector is obtained, thereby determining the detection status of the excitation source at different depths of the object under test; and by obtaining the reference power, the detector sensitivity of the detector in the depth direction of the object under test is adjusted, thereby improving the accuracy of the measurement.

[0015] Optionally, the generation of the time sensitivity gain curve based on the echo power is specifically achieved using the following formula: G = P - P0 + 2αd Where G is the time sensitivity gain, P is the echo power, P0 is the reference power, α is the value of the attenuation coefficient curve of the echo signal at the depth position, and d is the depth.

[0016] By adopting the above technical solution, the time sensitivity gain is linked to the echo power, thereby obtaining the sensitivity gain value of the measured object at different times, which facilitates the adjustment of the echo power and expands the dynamic measurement range of the echo signal.

[0017] Optionally, the processing module is configured to adjust the transmission power of the excitation source from the initial power to a first power when the first time sensitivity gain value is greater than or equal to a preset first threshold, wherein the first power is less than the preset first threshold and the first time sensitivity gain value is the value of any point on the time sensitivity gain curve; and to adjust the transmission power of the excitation source from the initial power to a second power when the second time sensitivity gain value is less than or equal to a preset second threshold, wherein the second power is greater than the preset second threshold and the second time sensitivity gain value is the value of any point on the time sensitivity gain curve.

[0018] By adopting the above technical solution, when the sensitivity gain value is high, the transmission power of the excitation source is reduced, thereby enabling the measurement of strong signals exceeding the analog-to-digital converter threshold; when the sensitivity gain value is low, the transmission power of the excitation source is increased, thereby enabling the measurement of weak signals submerged by noise; thus, the dynamic measurement range of the echo signal is expanded.

[0019] Optionally, after adjusting the emission power of the excitation source based on the time sensitivity gain curve, the method further includes: an acquisition module for acquiring a correction echo signal, wherein the correction echo signal is an echo signal acquired after the emission power of the excitation source is adjusted; a processing module for generating a high-resolution image based on the correction echo signal; extracting multiple feature information from the high-resolution image, wherein the feature information represents feedback information generated after the object under test interacts with the detection beam; and if the multiple feature information meets a preset standard, displaying the high-resolution image on the display screen of the OCT detector.

[0020] By employing the above technical solution, after adjusting the transmission power of the excitation source, the corrected echo signal is converted into a high-resolution image. If multiple feature information in the high-resolution image meets preset standards, it can be determined that the high-resolution image can meet the diagnostic needs of medical personnel; otherwise, the transmission power of the excitation source needs to be further adjusted. This improves the recognition accuracy of the high-resolution image, helping medical personnel to quickly complete diagnoses based on the high-resolution image.

[0021] Optionally, before acquiring the echo signal, the method further includes: setting the initial transmission power of the excitation source to a third power, wherein the third power is the average of multiple historical initial transmission powers, and the historical transmission power is the transmission power of the excitation source when the imaging effect meets a preset standard.

[0022] By adopting the above technical solution, the average value of multiple historical initial transmission powers is used as the transmission power of the excitation source, thereby reducing the number of times the transmission power of the excitation source needs to be adjusted and improving the efficiency of imaging.

[0023] Thirdly, this application provides an electronic device including a processor, a memory, a user interface, and a network interface. The memory is used to store instructions, the user interface and the network interface are used to communicate with other devices, and the processor is used to execute the instructions stored in the memory to cause the electronic device to perform the method as described in any one of the first aspects.

[0024] Fourthly, this application provides a computer-readable storage medium storing instructions that, when executed, perform the method described in any one of the first aspects.

[0025] In summary, one or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages: 1. The OCT detector calculates the echo power of the echo signal and generates a time sensitivity gain curve based on the echo power, thereby obtaining the measurement results of the tissue structure of the test object at different depths. Then, based on the time sensitivity gain curve, it adjusts the emission power of the excitation source to adjust the signal strength at different positions in the depth direction of the test object, enhances the signal strength of weak signals that were not detected in the measurement results, and weakens the signal strength of strong signals that were not detected in the measurement results, thereby expanding the dynamic measurement range of the OCT system, improving the signal-to-noise ratio of the system, and achieving more accurate measurement. 2. After adjusting the transmission power of the excitation source, the corrected echo signal is converted into a high-resolution image. If multiple feature information in the high-resolution image meets preset standards, it can be determined that the high-resolution image can meet the diagnostic needs of medical personnel; otherwise, the transmission power of the excitation source needs to be further adjusted. This improves the recognition accuracy of the high-resolution image, helping medical personnel to quickly complete diagnoses based on the high-resolution image. Attached Figure Description

[0026] Figure 1 This is a flowchart illustrating a method for extending the dynamic measurement range of a system provided in an embodiment of this application.

[0027] Figure 2 This is a high-resolution image comparison diagram before and after excitation source adjustment provided in an embodiment of this application.

[0028] Figure 3 This is a flowchart illustrating another method for extending the dynamic measurement range of a system provided in an embodiment of this application.

[0029] Figure 4 This is a schematic diagram of the structure of a device for extending the dynamic measurement range of a system provided in an embodiment of this application.

[0030] Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application.

[0031] Explanation of reference numerals in the attached drawings: 1. Acquisition module; 2. Processing module; 500. Electronic device; 501. Processor; 502. Communication bus; 503. User interface; 504. Network interface; 505. Memory. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0033] In the description of the embodiments of this application, the words "for example" or "for instance" are used to indicate examples, illustrations, or explanations. Any embodiment or design that is described as "for example" or "for instance" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design options. Rather, the use of the words "for example" or "for instance" is intended to present the relevant concepts in a specific manner.

[0034] In the description of the embodiments of this application, the term "multiple" means two or more. For example, multiple systems means two or more systems, and multiple screen terminals means two or more screen terminals. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. The terms "comprising," "including," "having," and variations thereof all mean "including but not limited to," unless otherwise specifically emphasized.

[0035] Before introducing the embodiments of this application, some terms involved in the embodiments of this application will be defined and explained.

[0036] OCT technology: OCT stands for Optical Coherence Tomography, a non-invasive optical imaging technique. OCT utilizes the coherence of laser light and the principle of optical interference to detect and analyze features such as reflectivity, scattering rate, and optical path within a sample, thereby achieving high-resolution, high-precision three-dimensional imaging. OCT is a non-contact, non-destructive, highly sensitive, and high-resolution imaging technology widely used in fields such as medicine, bioscience, and materials science.

[0037] Probe and Reference Beams: The light emitted from the laser source is split into two beams by a beam splitter. One beam, called the probe beam, is reflected back to the sample; the other beam, called the reference beam, is reflected to the reference path. The optical path difference between the two beams can be controlled by adjusting the optical path of the reference beam, thereby achieving depth detection of the object under test. After the probe and reference beams intersect, an echo signal is generated. By processing the echo signal, information such as the reflectivity and scattering rate inside the sample can be obtained.

[0038] Time-domain OCT system: The time-domain OCT system introduces a scanning delay into the interference signal of the probe beam and the reference beam, and constructs a depth profile image by recording the interference signal under different delays.

[0039] Ultrasonic detection system: An ultrasonic detection system is a technology that uses ultrasonic waves for detection and imaging. It obtains the internal structure and characteristics of the object being detected by emitting ultrasonic pulses and receiving their echo signals.

[0040] Currently, when using OCT technology to diagnose eye diseases, the excitation source of the OCT device emits detection light towards the patient's eye. This detection light, after passing through a beam splitter, is divided into a probe beam and a reference beam. The probe beam is reflected back to the patient's eye, while the reference beam is reflected into a reference optical path. When the probe beam interacts with the eye tissue, phenomena such as reflection, scattering, and refraction occur. The reference beam merges with the probe beam in the reference optical path, generating an echo signal. The OCT device then acquires this echo signal, and finally, by processing and analyzing the acquired echo signal, a high-resolution image is obtained to help medical personnel diagnose eye diseases.

[0041] However, in commonly used time-domain OCT systems, measurements are usually performed by acquiring analog signals through analog-to-digital converters. Due to the large differences in echoes from different tissues of the measured object, the analog signals returned by the measured object have a large dynamic range when input to the amplifier. This can cause weak signals to be submerged by noise and undetectable, and strong signals to exceed the threshold of the analog-to-digital converter, resulting in distortion and the inability to obtain the correct signal.

[0042] To address the aforementioned problems, this application provides a method for extending the dynamic measurement range of a system, applied to an OCT detector OLCR, such as... Figure 1 As shown, the method includes steps S101 to S104.

[0043] S101. After the excitation source emits detection light to the object under test, the echo signal is acquired. The echo signal includes reflectivity, scattering rate, time delay, and intensity of reflected light.

[0044] Specifically, the excitation source is the detection light transmitting device in the OCT detector. When the user uses the OCT detector to detect the object, the excitation source emits detection light towards the object. To obtain a better high-resolution image during the transmission of the detection light, the emission power of the excitation source often needs to be adjusted multiple times. To reduce the number of times the excitation source's emission power needs to be adjusted and improve imaging efficiency, the OCT device sets the initial emission power of the excitation source to the average of multiple historical initial emission powers. These multiple historical initial emission powers can be understood as the emission power corresponding to the imaging effect of multiple workers within a preset time period that meets the preset standard. The preset time period can be understood as the time period closest to the current time point, preferably 7 days. Of course, the setting of the preset time period depends on the actual situation and is not limited here. For example, if the current time point is June 20th, then the preset time period is from June 13th to June 20th.

[0045] After the excitation source emits a detection beam towards the object under test (DUT), the detection beam is split into a probe beam and a reference beam by a beam splitter. The probe beam is reflected back towards the DUT, and the reference beam is reflected back towards the reference optical path. The reference optical path can be understood as the optical path that enters the interferometer directly without passing through the DUT. When the probe beam interacts with the DUT, it merges with the reference beam in the reference optical path, generating an echo signal. The echo signal includes reflectivity, scattering rate, time delay, and reflected light intensity. Reflectivity can be understood as the degree to which different tissues within the imaging area reflect light; scattering rate can be understood as the degree to which different tissues within the imaging area scatter light; and time delay can be understood as the time difference between the emitted light reaching the target tissue, being reflected, and returning to the OCT device, used to represent the depth and location of the imaging tissue. After the reference beam and probe beam merge and enter the interferometer, the OCT device acquires the echo signal.

[0046] S102. Calculate the echo power corresponding to the echo signal.

[0047] Specifically, before calculating the echo power from the echo signal, the detector sensitivity needs to be calibrated to ensure a more accurate calculated echo power. The OCT device first acquires the standard echo signal from a standard reflector, which can be understood as a reference object used to calibrate the performance of the optical system. For example, a standard reflector can be PMMA, polytetrafluoroethylene, or optical glass. The method for acquiring the standard echo signal is the same as that for the echo signal from the object being measured, and will not be elaborated further here. Then, based on the reflectivity and reflected light signal intensity in the standard echo signal, the reflected power of the standard reflector is obtained. The reference power and echo signal intensity are then obtained. Here, the reference power is the reference light power input from the excitation source, and the echo signal intensity is the light power reflected back from the object being measured. The detector sensitivity is obtained using the following formula: Where S is the detector sensitivity, P r P is the reflected power, P0 is the reference power, and P m The echo signal intensity is given by this formula. The detector sensitivity at different depths is obtained using this formula. The OCT equipment then collects the echo signal from the object under test based on the calculated detector sensitivity, thereby improving the accuracy of signal acquisition.

[0048] After calibrating the detector sensitivity, the OCT equipment converts the acquired echo signal from analog to digital, and then performs IV conversion to obtain a voltage signal. This voltage signal reflects the interaction between the measured object and the probe light at different depths. Then, the detector resistance and sensitivity are obtained, and the echo power corresponding to the echo signal is calculated using the following formula: Where P is the echo power, V is the voltage signal value, R is the detector resistance, and S is the detector sensitivity. This formula is used to obtain the reflection and scattering capabilities of the object at different depths, thereby understanding its tissue structure and physiological state. Simultaneously, OCT equipment can obtain high-resolution images based on the differences in echo power along the depth direction, aiding medical personnel in rapid diagnosis.

[0049] S103. Generate a time sensitivity gain curve based on the echo power.

[0050] Specifically, in OCT imaging, the light signal intensity varies greatly at different depths. To improve imaging quality, the OCT device generates a time-sensitivity gain curve based on the echo power. This curve reflects the amplification factor of the light signal intensity at different depths. The OCT device can more precisely adjust the amplification factor based on the time-sensitivity gain, thereby improving the signal-to-noise ratio. The time-sensitivity gain curve is calculated using the following formula: G = P - P0 + 2αd Where G is the time sensitivity gain, P is the echo power, P0 is the reference power, α is the value of the attenuation coefficient curve of the echo signal at the depth position, and d is the depth.

[0051] S104. Adjust the transmit power of the excitation source based on the time-power curve generated by the time sensitivity gain curve.

[0052] Specifically, in adjusting the amplification factor of the light signal intensity at different depths, when the signal frequency is high, such as reaching GHz, controlling the amplifier gain at this time is affected by the gain-bandwidth product of the amplifier, resulting in a limited amplification range. Furthermore, in large-scale imaging along the depth direction, some signals are weak, and using fixed gain control requires complex algorithms to resolve them, or even results in no signal at all, thus reducing the success rate of imaging. Therefore, this application, after obtaining the time sensitivity gain curve, generates a time-power curve based on the time sensitivity gain curve to adjust the emission power of the excitation source. The time sensitivity gain curve and the time-power curve reflect the time sensitivity gain and power gain of the excitation source at a certain moment. When either the time sensitivity gain or the power gain changes, the other parameter changes accordingly. Therefore, when the time sensitivity gain is high, the emission power of the excitation source is reduced, i.e., the power gain is decreased; when the time sensitivity gain is low, the emission power of the excitation source is increased, i.e., the power gain is increased. Specifically, when the first time sensitivity gain value is greater than or equal to a preset first threshold, the transmission power of the excitation source is adjusted from the initial power to the first power, where the first power is less than the preset first threshold, and the first time sensitivity gain value is the value at any point on the time sensitivity gain curve. When the second time sensitivity gain value is less than or equal to a preset second threshold, the transmission power of the excitation source is adjusted from the initial power to the second power, where the second power is greater than the preset second threshold, and the second time sensitivity gain value is the value at any point on the time sensitivity gain curve. At this time, the amplification factor of the control amplifier is converted into the transmission power of the control excitation source, thereby improving the signal-to-noise ratio of the system. Furthermore, for weak and strong signals, adjusting the transmission power of the excitation source increases the signal strength of the weak signal and decreases the signal strength of the strong signal, thus expanding the dynamic measurement range of the system. Based on this characteristic, this adjustment method can also be applied to the field of ultrasonic detection. In an ultrasonic detection system, by detecting the ultrasonic signal returned by the object under test, the power of the ultrasonic pulse emitted by the ultrasonic transmitter is adjusted, thereby adjusting the signal strength of the ultrasonic signal returned by the object under test. This improves the detection accuracy of the ultrasonic signal strength.

[0053] For example, such as Figure 2As shown, this illustrates the need for medical personnel to obtain high-resolution images of a patient's eye tissues. Image A shows the eye tissues, Image B is the high-resolution image before adjustment, and Image C is the high-resolution image after adjustment. The tissue structures in Image A include the cornea, lens, and optic nerve. In Image B, only the echo signals from the cornea and optic nerve are obtained; the echo signal from the lens is drowned out by noise. By adjusting the emission power of the excitation source—reducing the emission power at the lens and increasing the emission power at the cornea—the echo signals from the cornea, lens, and optic nerve are obtained in Image C. This not only expands the dynamic measurement range of the system but also improves the signal-to-noise ratio and reduces costs by controlling the emission power of the excitation source to meet the amplifier's gain requirements for the echo signals.

[0054] In one possible implementation, to improve the recognition accuracy of high-resolution images, after adjusting the emission power of the excitation source based on the time-sensitivity gain curve, such as... Figure 3 As shown, the method further includes steps S301 to S304.

[0055] S301. Acquire the correction echo signal. The correction echo signal is the echo signal acquired after the excitation power of the excitation source is adjusted.

[0056] Specifically, after adjusting the emission power of the excitation source, it is necessary to determine whether the generated high-resolution image meets the preset standards. At this point, the excitation source emits detection light towards the object under test at the adjusted emission power, and then acquires the correction echo signal.

[0057] S302. Generate a high-resolution image based on the corrected echo signal.

[0058] Specifically, the corrected echo signal includes the reflection characteristics of light and the object under test, such as reflectivity, scattering rate, and time delay. The OCT device constructs a high-resolution image of the object under test based on these reflection characteristics. The high-resolution image can be constructed using spatial stacking, super-resolution reconstruction, or coherent modulation methods, etc. The specific method used depends on the actual situation and is not limited here.

[0059] S303. Extract multiple feature information from the high-resolution image. The feature information is used to represent the feedback information generated after the object under test interacts with the detection beam.

[0060] If multiple feature information meets the preset standard, S304 will display a high-resolution image on the OCT detector's screen.

[0061] Specifically, the high-resolution image contains feature information corresponding to different tissue structures of the tested object. This feature information can be understood as feedback information generated after the tested object interacts with the probe beam. The OCT device extracts multiple feature information pieces and then matches them with preset standards. If the multiple feature information pieces meet the preset standards, the high-resolution image is displayed on the OCT detector's screen; otherwise, the emission power of the excitation source is adjusted. The preset standards can be understood as a pre-defined echo signal detection range based on the tissue structure of the tested object.

[0062] This application also provides a device for extending the dynamic measurement range of a system, which is an OCT detector, such as... Figure 4 As shown, the OCT detector includes an acquisition module and a processing module, wherein: The acquisition module 1 is used to acquire the echo signal after the excitation source emits detection light to the object under test. The echo signal includes reflectivity, scattering rate, time delay and intensity of reflected light. Processing module 2 is used to calculate the echo power corresponding to the echo signal; generate a time sensitivity gain curve based on the echo power; and adjust the transmission power of the excitation source based on the time-power curve generated by the time sensitivity gain curve.

[0063] In one possible implementation, the acquisition module 1 is used to perform IV conversion on the echo signal to obtain a voltage signal; acquire the detector resistance and detector sensitivity of the OCT detector; and the processing module 2 is used to calculate the echo power based on the voltage signal, detector resistance, and detector sensitivity.

[0064] In one possible implementation, before calculating the echo power corresponding to the echo signal, the method includes: an acquisition module 1 for acquiring a standard echo signal from a standard reflector, the standard reflector being a reference object for calibrating the performance of the optical system; a processing module 2 for calculating the reflected power based on the standard echo signal; acquiring a reference power corresponding to the reflected power, the reference power being the input power when the excitation source sends a probe beam to the standard reflector; and calculating the detector sensitivity based on the reflected power and the reference power using a preset sensitivity algorithm.

[0065] In one possible implementation, a time sensitivity gain curve is generated based on the echo power, specifically using the following formula: G = P - P0 + 2αd Where G is the time sensitivity gain, P is the echo power, P0 is the reference power, α is the value of the attenuation coefficient curve of the echo signal at the depth position, and d is the depth.

[0066] In one possible implementation, the processing module 2 is configured to adjust the transmission power of the excitation source from the initial power to a first power when the first time sensitivity gain value is greater than or equal to a preset first threshold, wherein the first power is less than the preset first threshold and the first time sensitivity gain value is the value of any point on the time sensitivity gain curve; and when the second time sensitivity gain value is less than or equal to a preset second threshold, adjust the transmission power of the excitation source from the initial power to a second power, wherein the second power is greater than the preset second threshold and the second time sensitivity gain value is the value of any point on the time sensitivity gain curve.

[0067] In one possible implementation, after adjusting the emission power of the excitation source based on the time sensitivity gain curve, the method further includes: an acquisition module 1 for acquiring a correction echo signal, wherein the correction echo signal is the echo signal acquired after the emission power of the excitation source is adjusted; a processing module 2 for generating a high-resolution image based on the correction echo signal; extracting multiple feature information from the high-resolution image, wherein the feature information is used to represent the feedback information generated after the object under test interacts with the detection beam; and if the multiple feature information meets a preset standard, then displaying the high-resolution image on the display screen of the OCT detector.

[0068] In one possible implementation, before acquiring the echo signal, the method further includes: setting the initial transmit power of the excitation source to a third power, the third power being the average of multiple historical initial transmit powers, the historical transmit power being the transmit power of the excitation source when the imaging effect meets a preset standard.

[0069] It should be noted that the above embodiments of the apparatus are only illustrated by the division of the above functional modules. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the apparatus and method embodiments provided in the above embodiments belong to the same concept, and the specific implementation process can be found in the method embodiments, which will not be repeated here.

[0070] This application also improves an electronic device. (See reference...) Figure 5 , Figure 5 This is a schematic diagram of the structure of an electronic device disclosed in an embodiment of this application. The electronic device 500 may include: at least one processor 501, at least one network interface 504, a user interface 503, a memory 505, and at least one communication bus 502.

[0071] The communication bus 502 is used to enable communication between these components.

[0072] The user interface 503 may include a display screen and a camera. Optionally, the user interface 503 may also include a standard wired interface and a wireless interface.

[0073] The network interface 504 may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface).

[0074] The processor 501 may include one or more processing cores. The processor 501 connects to various parts of the server using various interfaces and lines, and performs various server functions and processes data by running or executing instructions, programs, code sets, or instruction sets stored in memory 505, and by calling data stored in memory 505. Optionally, the processor 501 may be implemented using at least one hardware form of Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). The processor 501 may integrate one or a combination of several of the following: Central Processing Unit (CPU), Graphics Processing Unit (GPU), and modem. The CPU primarily handles the operating system, user interface, and applications; the GPU is responsible for rendering and drawing the content required for display; and the modem handles wireless communication. It is understood that the modem may also not be integrated into the processor 501 and may be implemented as a separate chip.

[0075] The memory 505 may include random access memory (RAM) or read-only memory. Optionally, the memory 505 may include a non-transitory computer-readable storage medium. The memory 505 may be used to store instructions, programs, code, code sets, or instruction sets. The memory 505 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function (such as touch function, sound playback function, image playback function, etc.), instructions for implementing the above-described method embodiments, etc.; the data storage area may store data involved in the above-described method embodiments, etc. Optionally, the memory 505 may also be at least one storage device located remotely from the aforementioned processor 501. (Refer to...) Figure 5The memory 505, which serves as a computer storage medium, may include an operating system, a network communication module, a user interface module, and an application program for a method to extend the dynamic measurement range of the system.

[0076] exist Figure 5 In the illustrated electronic device 500, the user interface 503 is mainly used to provide an input interface for the user and acquire user input data; while the processor 501 can be used to call an application program stored in the memory 505 for a method to extend the dynamic measurement range of the system. When executed by one or more processors 501, the electronic device 500 performs one or more of the methods described in the above embodiments. It should be noted that, for the foregoing method embodiments, for the sake of simplicity, they are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, because according to this application, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0077] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0078] In the various embodiments provided in this application, it should be understood that the disclosed apparatus can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of 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 service interface; the indirect coupling or communication connection between apparatuses or units may be electrical or other forms.

[0079] 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.

[0080] Furthermore, the functional units in the various embodiments of this application 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.

[0081] 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 device (CMD). Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a memory and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned memory includes various media capable of storing program code, such as USB flash drives, portable hard drives, magnetic disks, or optical disks.

[0082] The above description is merely an exemplary embodiment of this disclosure and should not be construed as limiting the scope of this disclosure. Any equivalent changes and modifications made in accordance with the teachings of this disclosure shall still fall within the scope of this disclosure. Other embodiments of this disclosure will be readily apparent to those skilled in the art upon consideration of the specification and the disclosure of practical truths.

[0083] This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not described in this disclosure. The specification and embodiments are to be considered exemplary only, and the scope and spirit of this disclosure are defined by the claims.

Claims

1. A method for extending the dynamic measurement range of a system, characterized in that, Applied to an OCT detector, the method includes: After the excitation source emits a detection light beam toward the object under test, the echo signal is acquired. The echo signal includes reflectivity, scattering rate, time delay, and intensity of reflected light. Calculating the echo power corresponding to the echo signal includes: performing IV conversion on the echo signal to obtain a voltage signal; Obtain the detector resistance and detector sensitivity of the OCT detector; The echo power is calculated based on the voltage signal, detector resistance, and detector sensitivity; wherein, the standard echo signal of a standard reflector is obtained, and the standard reflector is a reference object for calibrating the performance of the optical system; The reflected power is calculated based on the standard echo signal. Obtain the reference power corresponding to the reflected power, where the reference power is the input power when the excitation source sends a probe beam to the standard reflector; The detector sensitivity is calculated using a preset sensitivity algorithm based on the reflected power and the reference power. A time sensitivity gain curve is generated based on the echo power, wherein the specific formula for generating the time sensitivity gain curve based on the echo power is as follows: ； Where G is the time sensitivity gain and P is the echo power. For reference power, represents the value of the attenuation coefficient curve of the echo signal at the depth direction, where d is the depth; The transmission power of the excitation source is adjusted based on the time-power curve generated by the time sensitivity gain curve. The time sensitivity gain curve and the time-power curve reflect the time sensitivity gain and power gain of the excitation source at a certain moment. When either the time sensitivity gain or the power gain changes, the other parameter changes accordingly.

2. The method according to claim 1, characterized in that, The method of adjusting the transmission power of the excitation source based on the time-power curve generated by the time sensitivity gain curve is as follows: When the first time sensitivity gain value is greater than or equal to the preset first threshold, the transmission power of the excitation source is adjusted from the initial power to the first power, the first power is less than the preset first threshold, and the first time sensitivity gain value is the value of any point on the time sensitivity gain curve. When the second time sensitivity gain value is less than or equal to the preset second threshold, the transmission power of the excitation source is adjusted from the initial power to the second power, the second power is greater than the preset second threshold, and the second time sensitivity gain value is the value of any point on the time sensitivity gain curve.

3. The method according to claim 1, characterized in that, After adjusting the emission power of the excitation source based on the time-power curve generated by the time sensitivity gain curve, the method further includes: Acquire a correction echo signal, wherein the correction echo signal is the echo signal acquired after the transmission power of the excitation source is adjusted; A high-resolution image is generated based on the corrected echo signal; Multiple feature information is extracted from the high-resolution image, and the feature information is used to represent the feedback information generated after the object under test interacts with the detection beam; If multiple of the aforementioned feature information meet the preset criteria, the high-resolution image is displayed on the screen of the OCT detector.

4. The method according to claim 1, characterized in that, Before acquiring the echo signal, the method further includes: The initial transmission power of the excitation source is set as the third power, which is the average of multiple historical initial transmission powers. The historical initial transmission power is the transmission power of the excitation source when the imaging effect meets the preset standard.

5. An apparatus for extending the dynamic measurement range of a system, used to implement the method described in any one of claims 1 to 4, characterized in that, The device is an OCT detector, which includes an acquisition module (1) and a processing module (2), wherein: The acquisition module (1) is used to acquire the echo signal after the excitation source emits detection light to the object under test. The echo signal includes reflectivity, scattering rate, time delay and intensity of reflected light. The processing module (2) is used to calculate the echo power corresponding to the echo signal; generate a time sensitivity gain curve based on the echo power; and adjust the transmission power of the excitation source based on the time-power curve generated by the time sensitivity gain curve.

6. An electronic device, characterized in that, The device includes a processor (501), a memory (505), a user interface (503), and a network interface (504). The memory (505) is used to store instructions. The user interface (503) and the network interface (504) are used to communicate with other devices. The processor (501) is used to execute the instructions stored in the memory (505) to cause the electronic device (500) to perform the method as described in any one of claims 1 to 4.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores instructions that, when executed, perform the method as described in any one of claims 1 to 4.

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