Blood oxygen simulation system based on multi-path optical system feedback regulation circuit

Abstract

The invention provides a blood oxygen simulation system based on a multi-path optical system feedback regulation circuit, which belongs to the technical field of electronic control and comprises a light-emitting driving module, a feedback regulation module and a light-emitting tube, the feedback adjustment module comprises a first feedback adjustment sub-module and a second feedback adjustment sub-module; the light-emitting driving module is electrically connected to the first end of the light-emitting tube and is used for collecting a light signal emitted by the to-be-tested equipment and driving the light-emitting tube to emit light; one end of the first feedback adjustment sub-module is electrically connected to one end of the second feedback adjustment sub-module; the first feedback regulation sub-module is used for carrying out feedback regulation on the light-emitting tube according to the light-emitting intensity of the light-emitting tube; and the second feedback regulation sub-module is used for carrying out feedback regulation on the light-emitting tube according to the intensity of the current flowing through the light-emitting tube. According to the invention, through multi-dimensional feedback adjustment, the light intensity and the current intensity of the light-emitting tube are accurately controlled, so that the precision and the stability of the system are improved.

Description

Technical Field

[0001] This invention relates to the field of electronic control technology, and in particular to a blood oxygen simulation system based on a multi-path optical system feedback adjustment circuit. Background Technology

[0002] With the widespread application of pulse oximeters in health monitoring, accurate detection of blood oxygen concentration and pulse signals is crucial for the effectiveness of the devices. During the research and calibration of pulse oximeters, it is often necessary to simulate the operating environment of the oximeter using a simulation system to test its performance under different conditions. The core task of a pulse oximeter simulation system is to simulate the optical behavior of the oximeter under different pulse rates and blood oxygen concentrations, especially the light signal emitted by the LED, which directly affects the detection accuracy and stability of the device under test.

[0003] Traditional pulse oximetry simulation systems typically employ simple drive circuits to control the emission of LEDs. However, due to the lack of precise feedback adjustment mechanisms, the luminous intensity and current of the LEDs are easily affected by changes in the external environment or circuit fluctuations, leading to instability in the optical signal. For example, changes in ambient temperature, unstable power supply voltage, or the nonlinear characteristics of the system itself can all cause deviations in the output light intensity of the LEDs, thereby affecting the simulation accuracy of the system.

[0004] Therefore, how to accurately control the light intensity of the LED in a pulse oximeter simulation system to ensure the stability of the light signal and the accuracy of the simulation process has become an urgent technical problem to be solved. Summary of the Invention

[0005] This invention provides a pulse oximetry simulation system based on a multi-path optical system feedback adjustment circuit to overcome the deficiencies in the prior art, and to achieve precise control of the light intensity of the light-emitting diode in the pulse oximeter simulation system, so as to ensure the stability of the light signal and the simulation accuracy during the simulation process.

[0006] This invention provides a blood oxygen simulation system based on a multi-path optical system feedback adjustment circuit, comprising: a light-emitting driving module, a feedback adjustment module, and a light-emitting diode; the feedback adjustment module includes a first feedback adjustment submodule and a second feedback adjustment submodule; The light-emitting driving module is electrically connected to the first end of the light-emitting tube and is used to collect the light signal emitted by the device under test and drive the light-emitting tube to emit light. One end of the first feedback adjustment submodule is electrically connected to one end of the second feedback adjustment submodule; The first feedback adjustment submodule is used to adjust the light-emitting diode according to the light-emitting intensity of the light-emitting diode; The second feedback adjustment submodule is used to adjust the light-emitting diode based on the current intensity flowing through it.

[0007] According to the present invention, a blood oxygen simulation system based on a multi-path optical system feedback adjustment circuit is provided, wherein the first feedback adjustment submodule includes: a first silicon photovoltaic cell PC1, a first operational amplifier U1, a second operational amplifier U2, a first resistor R1, a second resistor R2, and a third resistor R3. The inverting input terminal of the first operational amplifier U1 is simultaneously electrically connected to one end of the first resistor R1 and the output terminal of the first silicon photovoltaic cell PC1; The other end of the first resistor R1 and the non-inverting input terminal of the second operational amplifier U2 are both electrically connected to the output terminal of the first operational amplifier U1; One end of the second resistor R2 is electrically connected to the inverting input terminal of the second operational amplifier U2, and the other end of the second resistor R2 is electrically connected to the output terminal of the second operational amplifier U2; One end of the third resistor R3 is electrically connected to the output terminal of the second operational amplifier U2.

[0008] According to the present invention, a blood oxygen simulation system based on a multi-path optical system feedback adjustment circuit is provided, wherein the second feedback adjustment submodule includes: a voltage input unit, a second operational amplifier U2, a third operational amplifier U3, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a first capacitor C1. One end of the second resistor R2 is electrically connected to the inverting input terminal of the second operational amplifier U2, and the other end of the second resistor R2 is electrically connected to the output terminal of the second operational amplifier U2; One end of the third resistor R3 is electrically connected to the output terminal of the second operational amplifier U2; One end of the fourth resistor R4 is electrically connected to the voltage input unit, and the other end of the fourth resistor R4 is simultaneously electrically connected to the inverting input terminal of the third operational amplifier U3 and one end of the first capacitor C1. At the same time, the fourth resistor R4 is electrically connected to the output terminal of the third operational amplifier U3 through the first capacitor C1. One end of the sixth resistor R6 is electrically connected to the output terminal of the third operational amplifier U3; One end of the fifth resistor R5 is simultaneously electrically connected to the other end of the sixth resistor R6 and the inverting input terminal of the second operational amplifier U2.

[0009] According to the present invention, a blood oxygen simulation system based on a multi-path optical system feedback adjustment circuit is provided, wherein the feedback adjustment module further includes: a light-emitting diode driving control submodule and a current control submodule; One end of the LED driving control submodule is electrically connected to the output terminal of both the first feedback adjustment submodule and the second feedback adjustment submodule, and the other end of the LED driving control submodule is electrically connected to the input terminal of the current control submodule. The output terminal of the current control submodule is electrically connected to the negative feedback terminal of the second feedback regulation submodule.

[0010] According to the present invention, a blood oxygen simulation system based on a multi-path optical system feedback adjustment circuit is provided. The light-emitting diode driving control submodule includes a fourth operational amplifier U4, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a first transistor Q1, a second capacitor C2, a light-emitting diode driving signal terminal, and a control signal unit. One end of the seventh resistor R7 is electrically connected to the non-inverting input terminal of the fourth operational amplifier U4, one end of the ninth resistor R9, and the collector of the first transistor Q1; the other end of the seventh resistor R7 is electrically connected to the LED driving signal terminal. One end of the eighth resistor R8 is electrically connected to the inverting input terminal of the fourth operational amplifier U4, and the other end of the eighth resistor R8 is electrically connected to one end of the second capacitor C2. The output terminal of the fourth operational amplifier U4 is simultaneously electrically connected to the input terminal of the current control submodule and the other end of the second capacitor C2; The emitter of the first transistor Q1 is electrically connected to the other end of the ninth resistor R9; The control signal unit is electrically connected to the base of the first transistor Q1 and is used to control the conduction state of the first transistor Q1.

[0011] According to the present invention, a blood oxygen simulation system based on a multi-path optical system feedback adjustment circuit is provided, wherein the current control submodule includes a second transistor Q2, a third transistor Q3, a tenth resistor R10, an eleventh resistor R11, a first diode D1, and a control signal unit. The base of the second transistor Q2 is electrically connected to the other end of the LED driving control submodule, the collector of the second transistor Q2 is electrically connected to the cathode of the LED, and the emitter of the second transistor Q2 is simultaneously electrically connected to one end of the tenth resistor R10 and the collector of the third transistor Q3. The other end of the tenth resistor R10 is electrically connected to the positive terminal of the first diode D1; The cathode of the first diode D1 is electrically connected to the base of the third transistor Q3 through the control signal unit; The control signal unit is used to control the conduction state of the third transistor Q3; The emitter of the third transistor Q3 is electrically connected to the negative feedback terminal of the second feedback regulation submodule through the eleventh resistor.

[0012] According to the present invention, a blood oxygen simulation system based on a multi-path optical system feedback adjustment circuit is provided, wherein the voltage input unit includes: a digital-to-analog converter, a twelfth resistor R12, a thirteenth resistor R13, and a fifth operational amplifier U5; The output terminal of the digital-to-analog converter is electrically connected to one end of the twelfth resistor R12; The other end of the twelfth resistor R12 and one end of the thirteenth resistor R13 are both electrically connected to the inverting input of the fifth operational amplifier U5; The other end of the thirteenth resistor R13 is electrically connected to the output terminal of the fifth operational amplifier U5. The output terminal of the fifth operational amplifier U5 is electrically connected to one end of the fourth resistor R4.

[0013] According to the present invention, a blood oxygen simulation system based on a multi-path optical system feedback adjustment circuit is provided, wherein the control signal unit includes an optical signal acquisition and amplification subunit and a signal comparison and output subunit; One end of the optical signal acquisition and amplification subunit is electrically connected to one end of the signal comparison and output subunit, and is used to acquire the optical signal of the light-emitting diode and convert it into an electrical signal, amplify the electrical signal, and output the amplified electrical signal to the signal comparison and output subunit. The signal comparison and output subunit is used to compare the amplified electrical signal with a preset reference voltage to generate an output signal.

[0014] According to the present invention, a blood oxygen simulation system based on a multi-path optical system feedback adjustment circuit is provided, wherein the optical signal acquisition and amplification subunit includes a second silicon photovoltaic cell PC2, a sixth operational amplifier U6, a seventh operational amplifier U7, a fourteenth resistor R14, a fifteenth resistor R15, a third capacitor C3, and a fourth capacitor C4. The output terminal of the second silicon photovoltaic cell PC2 is electrically connected to the inverting input terminal of the sixth operational amplifier U6; The inverting input terminal of the sixth operational amplifier U6 is electrically connected to the output terminal of the sixth operational amplifier U6 through the third capacitor C3 and the fourteenth resistor R14 connected in parallel. The output terminal of the sixth operational amplifier U6 is simultaneously connected to one end of the fifteenth resistor R15 and the non-inverting input terminal of the seventh operational amplifier U7 through the fourth capacitor C4; The inverting input terminal of the seventh operational amplifier U7 is electrically connected to the output terminal of the seventh operational amplifier U7.

[0015] According to the present invention, a blood oxygen simulation system based on a multi-path optical system feedback adjustment circuit is provided. The signal comparison and output sub-unit includes a reference voltage input terminal, a pull-up voltage input terminal, an eighth operational amplifier U8, a sixteenth resistor R16, and a seventeenth resistor R17. The reference voltage input terminal is electrically connected to the non-inverting input terminal of the eighth operational amplifier U8 through the sixteenth resistor R16; The inverting input terminal of the eighth operational amplifier U8 is electrically connected to the output terminal of the optical signal acquisition and amplification subunit; The pull-up voltage input terminal is electrically connected to the output terminal of the eighth operational amplifier U8 through the seventeenth resistor R17, and is used to pull up the low level output by the eighth operational amplifier U8 to the pull-up voltage level.

[0016] According to the present invention, a blood oxygen simulation system based on a multi-path optical system feedback adjustment circuit is provided, wherein the light emission driving module includes a data acquisition submodule, an output submodule, and a data processing submodule. One end of the acquisition submodule is electrically connected to the first end of the data processing submodule, and is used to acquire the optical signal emitted by the device under test and input the optical signal to the data processing submodule. The first end of the output submodule is electrically connected to the second end of the data processing submodule, and the second end of the output submodule is electrically connected to the first end of the light-emitting diode; The data processing submodule is used to modulate the optical signal and transmit the processed optical signal to the light-emitting tube through the output submodule to drive the light-emitting tube to emit light.

[0017] The present invention also provides a multi-path optical system feedback adjustment method, the method comprising: acquiring the light signal emitted by the device under test through the light-emitting driving module, and driving the light-emitting diode to work based on the light signal; The feedback adjustment module monitors the operating status of the LED, wherein the operating status includes luminous intensity and current intensity; The first feedback adjustment submodule adjusts the light-emitting diode based on the light intensity, and the second feedback adjustment submodule adjusts the light-emitting diode based on the current intensity.

[0018] In summary, one or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages: First, the light-emitting drive module is electrically connected to the first end of the LED, primarily used to collect the light signals emitted by the device under test and drive the LED to emit light based on these signals. This allows the system to flexibly adjust the LED's light output based on real signals provided by external devices, thus accurately simulating the device's optical behavior under different conditions. Simultaneously, one end of the feedback adjustment module is electrically connected to the second end of the LED, enabling the system to acquire the LED's operating status in real time during the light emission process, thus allowing for feedback adjustment. Within the feedback adjustment module, the first and second feedback adjustment submodules are interconnected. This design allows the system to precisely adjust based on the LED's luminous intensity and current intensity, respectively. The first feedback adjustment submodule is responsible for feedback adjustment based on the LED's luminous intensity, ensuring that the LED's light output remains within a preset range, preventing excessively strong or weak light signals. Meanwhile, the second feedback adjustment submodule performs feedback adjustment by monitoring the current intensity flowing through the LED. The LED's operating current directly affects the stability of the light output; therefore, controlling the current through the second feedback adjustment submodule effectively prevents current fluctuations from affecting the LED's operating status. In summary, through this multi-channel optical system feedback adjustment circuit scheme, the system can flexibly acquire and drive the light-emitting diodes. At the same time, through a multi-level feedback adjustment mechanism, it can accurately control the light intensity of the light-emitting diodes in the pulse oximeter simulation system, so as to ensure the stability of the light signal and the simulation accuracy during the simulation process. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the blood oxygen simulation system based on a multi-path optical system feedback adjustment circuit provided by the present invention.

[0021] Figure 2 This is a circuit diagram of the feedback adjustment module provided by the present invention.

[0022] Figure 3 This is a circuit diagram of the voltage input unit provided by the present invention.

[0023] Figure 4 This is a circuit diagram of the control signal unit provided by the present invention.

[0024] Figure 5 This is a flowchart illustrating a multi-path optical system feedback adjustment method provided by the present invention. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0026] It should be noted that in the description of this invention, 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. Therefore, a feature defined as "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.

[0027] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "electrical connection," "electrical connection," or "communication electrical connection" should be interpreted broadly. For example, "electrical connection," "electrical connection," or "communication electrical connection" can refer not only to a physical electrical connection, but also to an electrical connection or a signal electrical connection. For instance, it can be a direct electrical connection, i.e., a physical electrical connection, or an indirect electrical connection through at least one intermediate component, as long as the circuit is connected. It can also refer to the internal connection between two components. A signal electrical connection can refer not only to a signal electrical connection through a circuit, but also to a signal electrical connection through a medium, such as radio waves. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0028] The following is combined with Figures 1-5 This invention describes a blood oxygen simulation system based on a multi-path optical system feedback adjustment circuit.

[0029] Figure 1 This is a schematic diagram of the blood oxygen simulation system based on a multi-path optical system feedback adjustment circuit provided by the present invention, as shown below. Figure 1 As shown, the system includes: a light-emitting driving module, a feedback adjustment module, and a light-emitting diode; the feedback adjustment module includes a first feedback adjustment submodule and a second feedback adjustment submodule; The light-emitting driver module is electrically connected to the first end of the light-emitting tube and is used to collect the light signal emitted by the device under test and drive the light-emitting tube to emit light. One end of the first feedback regulation submodule is electrically connected to one end of the second feedback regulation submodule; The first feedback adjustment submodule is used to adjust the LED based on its luminous intensity. The second feedback adjustment submodule is used to adjust the LED based on the current intensity flowing through it.

[0030] Specifically, this embodiment provides a pulse oximetry simulation system based on multi-path optical system feedback regulation. The system, through the coordinated operation of a light-emitting drive module, a feedback regulation module, and a light-emitting diode, can accurately simulate the optical signal output of a pulse oximeter, thereby meeting the testing requirements of the device under test.

[0031] In this system, the light-emitting drive module is connected to the first end of the light-emitting diode (LED) to collect the light signal emitted by the device under test and drive the LED to emit light. The reason for using the light-emitting drive module to drive the LED is to simulate the optical output of the pulse oximeter under different pulse rates and blood oxygen concentrations. Since the light intensity and current of the LED directly determine the working effect of the pulse oximeter, it is essential to ensure that the light signal accurately simulates the real environmental signal.

[0032] To ensure the output stability of the LED, the system is also equipped with a feedback adjustment module. This module is connected to the second end of the LED, monitors the LED's operating status in real time, and performs corresponding feedback adjustments. The feedback adjustment module includes a first feedback adjustment submodule and a second feedback adjustment submodule, which are interconnected and adjust the light intensity and current of the LED, respectively.

[0033] The first feedback adjustment submodule is responsible for adjusting the light intensity of the LED based on the LED's light intensity. The light intensity of the LED directly affects the detection accuracy of the device under test; therefore, the first feedback adjustment submodule ensures the stability of the light intensity. Specifically, the first feedback adjustment submodule monitors the output light signal of the LED and adjusts the LED's operating state in real time to ensure that the LED's light output remains within a set range under different operating conditions.

[0034] The second feedback regulation submodule adjusts the LED by monitoring the current intensity flowing through it. Since there is a non-linear relationship between current and luminous intensity, adjusting the light intensity alone may not completely stabilize the LED's output. Current, as a direct control variable, allows for more precise control of the LED's operating state. Therefore, by regulating the current feedback, the second feedback regulation submodule can precisely control the LED's current, thereby indirectly ensuring the stability of the light intensity. This design ensures that even during long-term operation, if the LED's characteristics change due to factors such as temperature or aging, the current regulation still guarantees the accuracy of the output light signal.

[0035] Through this dual feedback regulation mechanism, the system can monitor and adjust the operating status of the LEDs in real time. On the one hand, light intensity regulation ensures that the light output meets the expected simulation requirements; on the other hand, current regulation provides the system with higher control precision and stability, especially during long-term operation or changes in the external environment, ensuring that the analog system can still provide accurate and reliable output.

[0036] In one possible implementation, such as Figure 1 As shown, the light-emitting driving module includes a data acquisition submodule, an output submodule, and a data processing submodule; One end of the acquisition submodule is electrically connected to the first end of the data processing submodule, and is used to acquire the optical signal emitted by the device under test and input the optical signal to the data processing submodule. The first terminal of the output submodule is electrically connected to the second terminal of the data processing submodule, and the second terminal of the output submodule is electrically connected to the first terminal of the LED. The data processing submodule is used to modulate the optical signal and transmit the processed optical signal to the LED through the output submodule to drive the LED to emit light.

[0037] In this embodiment, the system uses a light-emitting driving module. Its core purpose is to collect the light signal emitted by the device under test, and after modulating the signal, drive the light-emitting tube to emit light, so as to achieve accurate simulation of the pulse oximeter.

[0038] First, the light-emitting driver module includes a data acquisition submodule, an output submodule, and a data processing submodule. This module is designed to ensure that the system can efficiently and accurately acquire the light signals from the device under test, and through the processed data output, achieve precise control of the light-emitting diode.

[0039] One end of the acquisition submodule connects to the first end of the data processing submodule, and its function is to acquire optical signals from the device under test. This step is crucial because the system needs these real optical signals to simulate the working environment of a pulse oximeter. The acquired optical signals are transmitted to the data processing submodule for further modulation and processing, enabling the system to effectively adjust according to preset blood oxygen information. Through this design, the system can dynamically adjust the input optical signal according to different test conditions, ensuring the flexibility of the simulated environment.

[0040] Once the optical signal enters the data processing submodule, this module is responsible for modulating the signal. This is to enable the system to generate an output signal that matches the actual physiological conditions based on preset blood oxygen concentration and pulse rate. The data processing submodule processes the input signal, converting it into an optical signal with the expected intensity and frequency. The modulated optical signal is then transmitted to the LED through the output submodule.

[0041] The first end of the output submodule is connected to the second end of the data processing submodule, which in turn is connected to the first end of the LED. The function of the output submodule is to convert the modulated signal into an electrical signal that actually drives the LED, thereby ensuring that the LED's light output accurately simulates the pulse oximetry signal in a real-world environment. By transmitting the processed signal to the LED, the system can drive the LED to emit a preset light signal, thus providing accurate blood oxygen and pulse simulation effects during the simulation process.

[0042] In this way, the system can simulate the actual light signal of the device under test and ensure that the output of the light-emitting diode matches the target environment, thereby improving the accuracy and reliability of the blood oxygen simulation system.

[0043] It should be noted that, in this embodiment, in addition to the core light-emitting driving module and feedback adjustment module, the system also includes a display module, a power supply module, a microprocessor, and a button module. The integration of these modules enables the entire blood oxygen simulation system to have higher functionality and user interactivity.

[0044] Firstly, the system design incorporates a display module to provide a user interface that displays current settings and the status of various parameters during the simulation. Through this module, users can intuitively view relevant information from the current blood oxygenation simulation, including preset blood oxygen concentration, pulse rate, and system operating status. This not only enhances the user experience but also helps users monitor the system's operation in real time, ensuring the accuracy of data during the simulation. The display module is connected to a microprocessor, which processes user input and converts it into a visual output.

[0045] The introduction of the power supply module ensures a stable power supply for the entire system. Since the system contains multiple complex electronic components and circuit modules, such as the light-emitting driver module, feedback regulation module, and display module, each with different power requirements, the design of the power supply module is crucial. It is responsible for providing a stable and appropriate power supply to each module, preventing system errors or failures caused by power instability or voltage fluctuations. By providing independent power control for each submodule, the power supply module ensures the reliability of the system during long-term operation.

[0046] The microprocessor, as the core control unit of the system, connects the display module, button module, light-emitting drive module, and feedback adjustment module. Its main function is to regulate the system as a whole based on user input. Users input preset blood oxygen information or other analog parameters through the button module. The microprocessor processes these inputs and transmits them to the data processing submodule, thereby controlling the illumination state of the LEDs. Simultaneously, the microprocessor sends the processing results to the display module, allowing users to intuitively see the current analog parameters and system status. The introduction of the microprocessor significantly improves the system's intelligence level, enabling it to automatically adjust the analog output based on user-set parameters, thus making the blood oxygen simulation system more flexible and efficient to operate.

[0047] The button module provides users with a means to interact with the system. Users can input information such as blood oxygen concentration and pulse rate to be simulated via the button module. The button module's design ensures that users can easily and quickly set system parameters, and the microprocessor transmits this information to other modules. The flexibility of the button module allows the system to adapt to different simulation needs; users can adjust the parameters of the blood oxygen simulation system according to actual testing conditions, thereby improving the system's applicability and operability.

[0048] Reference Figure 2 , Figure 2 This is a circuit diagram of the feedback adjustment module provided by the present invention.

[0049] In one possible implementation, such as Figure 2 As shown, the first feedback adjustment submodule includes: a first silicon photovoltaic cell PC1, a first operational amplifier U1, a second operational amplifier U2, a first resistor R1, a second resistor R2, and a third resistor R3; The inverting input terminal of the first operational amplifier U1 is simultaneously connected to one end of the first resistor R1 and the output terminal of the first silicon photovoltaic cell PC1. The other end of the first resistor R1 and the non-inverting input of the second operational amplifier U2 are both electrically connected to the output of the first operational amplifier U1. One end of the second resistor R2 is electrically connected to the inverting input terminal of the second operational amplifier U2, and the other end of the second resistor R2 is electrically connected to the output terminal of the second operational amplifier U2. One end of the third resistor R3 is electrically connected to the output terminal of the second operational amplifier U2.

[0050] In this embodiment, the design of the first feedback adjustment submodule ensures real-time feedback adjustment of the light intensity signal of the LED through precise circuit connections, thereby improving the system's control accuracy of light output. The first feedback adjustment submodule includes a first silicon photovoltaic cell PC1, a first operational amplifier U1, a second operational amplifier U2, a first resistor R1, a second resistor R2, and a third resistor R3. These components, through a reasonable circuit layout, construct an efficient feedback adjustment loop to respond in real-time to changes in the light signal of the LED.

[0051] First, the output of the first silicon photovoltaic cell PC1 is electrically connected to the inverting input of the first operational amplifier U1. Through this connection, the system can convert the light signal from the LED into an electrical signal. As the optical signal conversion element, the core function of PC1 is to capture the light intensity of the LED and convert it into a corresponding electrical signal, which is then transmitted to amplifier U1. U1 performs preliminary processing on the signal and stabilizes it through a negative feedback loop to ensure that the signal accurately reflects the changes in the light intensity of the LED.

[0052] To ensure the stability and accuracy of the operational amplifier, the first resistor R1 is designed to connect the inverting input and output of the first operational amplifier U1, forming a negative feedback loop. This design effectively limits the gain of U1, preventing signal distortion caused by over-amplification. Simultaneously, the other end of R1 is also connected to the non-inverting input of the second operational amplifier U2, ensuring that the signal output from U1 can be smoothly transmitted to U2 for further processing. Through this circuit design, the first feedback adjustment submodule can convert the optical signal and maintain it within a reasonable electrical signal range, preventing excessively large or small signals from affecting the accuracy of the feedback adjustment.

[0053] Next, the inverting input of the second operational amplifier U2 is connected to its output via a second resistor R2, forming a feedback loop for finer signal adjustment. R2 controls the gain of U2, allowing it to amplify or adjust the signal from U1, ensuring the output signal accurately reflects changes in the LED's light intensity. This two-stage amplification design enables more precise input signal processing, making feedback adjustment more sensitive and efficient.

[0054] Finally, one end of the third resistor R3 is connected to the output of the second operational amplifier U2. The design of R3 is mainly to ensure further stability of the signal during transmission and to provide appropriate current control for subsequent circuits. R3 not only ensures the stability of signal transmission but also provides the system with the ability to adjust the output level, thereby further enhancing the overall control capability of the first feedback regulation submodule.

[0055] Through the circuit connections of the aforementioned components, the first feedback adjustment submodule in this embodiment can perform real-time acquisition and precise adjustment of the light intensity signal of the LED. The core advantage of this circuit connection lies in the fact that, with the combined design of silicon photovoltaic cells, operational amplifiers, and feedback resistors, the system can sensitively capture and adjust the light signal, avoiding output errors caused by light intensity fluctuations. The dual-stage amplification design further improves the accuracy of signal processing, enabling the system to maintain stable feedback adjustment capabilities in complex working environments, thereby ensuring that the light output of the LED always meets the preset standards.

[0056] In one possible implementation, such as Figure 2 As shown, the second feedback regulation submodule includes: a voltage input unit, a second operational amplifier U2, a third operational amplifier U3, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a first capacitor C1. One end of the second resistor R2 is electrically connected to the inverting input terminal of the second operational amplifier U2, and the other end of the second resistor R2 is electrically connected to the output terminal of the second operational amplifier U2. One end of the third resistor R3 is electrically connected to the output terminal of the second operational amplifier U2; One end of the fourth resistor R4 is electrically connected to the voltage input unit, and the other end of the fourth resistor R4 is simultaneously electrically connected to the inverting input terminal of the third operational amplifier U3 and one end of the first capacitor C1. At the same time, the fourth resistor R4 is electrically connected to the output terminal of the third operational amplifier U3 through the first capacitor C1. One end of the sixth resistor R6 is electrically connected to the output terminal of the third operational amplifier U3; One end of the fifth resistor R5 is simultaneously connected to the other end of the sixth resistor R6 and the inverting input of the second operational amplifier U2.

[0057] In this embodiment, the design of the second feedback regulation submodule, through the connection of multi-stage operational amplifiers and a precision resistor-capacitor network, achieves precise regulation of the LED current intensity, ensuring the stability of the current output and the accuracy of control. This module includes a voltage input unit, a second operational amplifier U2, a third operational amplifier U3, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a first capacitor C1. The coordinated operation of these components ensures real-time feedback and regulation of the current signal.

[0058] First, one end of the second resistor R2 is connected to the inverting input of the second operational amplifier U2, and the other end is connected to the output of U2, forming a negative feedback loop for U2. Through this design, U2 can initially amplify and regulate the current signal of the LED, ensuring that the output signal accurately reflects the actual changes in current. The function of R2 is to control the gain of U2, preventing excessive signal amplification while ensuring the stability of the feedback regulation.

[0059] Next, one end of the third resistor R3 is connected to the output of U2, responsible for transmitting the initially amplified signal to the next stage of the circuit. R3 acts as a current limiter during signal transmission, ensuring that the signal current remains within a reasonable range and preventing excessive current from damaging subsequent circuit components. This design ensures the stability of the signal during transmission, thus providing a reliable foundation for subsequent adjustment processes.

[0060] The fourth resistor R4 is connected at one end to the voltage input unit, and at the other end to both the inverting input of the third operational amplifier U3 and one end of the first capacitor C1. R4 provides the voltage input signal to U3, while C1, connected in parallel, participates in signal modulation, filtering out high-frequency noise and ensuring the stability of the input signal. Through this circuit design, U3 can receive a stable voltage signal and further amplify it. In this process, C1, through its synergistic effect with R4, effectively improves the system's anti-interference capability against the input signal.

[0061] Meanwhile, R4 is electrically connected to the output of the third operational amplifier U3 through the first capacitor C1, forming a negative feedback loop for U3. Through this feedback loop design, U3 can dynamically adjust the input signal, ensuring the stability and accuracy of the output signal. As the second-stage amplifier, U3 plays a crucial role in this design, responsible for further adjusting the amplified signal from U2 to ensure that the current of the LED is controlled within a precise range.

[0062] One end of the sixth resistor R6 is connected to the output terminal of U3 to control the output current and prevent excessive current from impacting the system. R6, through its current-limiting function, ensures the stability of the signal when it enters the feedback loop. Simultaneously, one end of the fifth resistor R5 is connected to the other end of the sixth resistor R6 and the inverting input terminal of the second operational amplifier U2, forming a complete feedback loop. Through this dual feedback design, the system can efficiently and accurately regulate the current signal, thereby ensuring the stability and control precision of the LED current.

[0063] The core advantage of this circuit design lies in its ability to achieve real-time monitoring and precise adjustment of the LED current signal through the coordinated operation of multiple operational amplifiers and the appropriate configuration of resistors and capacitors. The voltage input unit provides a stable voltage reference, while dynamic adjustment via the feedback loop ensures stable signal transmission and response.

[0064] In one possible implementation, such as Figure 2 As shown, the feedback adjustment module also includes: a light-emitting diode drive control submodule and a current control submodule; One end of the LED driving control submodule is electrically connected to the output terminals of both the first feedback adjustment submodule and the second feedback adjustment submodule, while the other end of the LED driving control submodule is electrically connected to the input terminal of the current control submodule. The output of the current control submodule is electrically connected to the negative feedback terminal of the second feedback regulation submodule.

[0065] In this embodiment, the feedback adjustment module includes a light-emitting diode drive control submodule and a current control submodule. The coordinated operation of these two modules provides precise dual control over the light intensity and current of the light-emitting diode, thereby ensuring the stability and efficiency of the system.

[0066] First, the LED driver control submodule is designed based on the joint processing of output signals from the first and second feedback regulation submodules. One end connects to the output of the first feedback regulation submodule, receiving signals related to the LED's light intensity; simultaneously, the other end connects to the output of the second feedback regulation submodule, receiving signals related to current intensity. Through this dual-path connection, the LED driver control submodule can simultaneously monitor and process signals from both feedback regulation loops, ensuring close coordination between the LED's light intensity and current. The driver control submodule combines these two feedback signals to generate a comprehensive control signal for controlling the LED's operating state. This design dynamically balances light intensity and current, preventing the limitations of single-signal regulation and thus improving the overall system performance.

[0067] To ensure precise and stable current control of the LED, the other end of the LED driver control submodule is electrically connected to the input terminal of the current control submodule. The task of the current control submodule is to further regulate and limit the current based on the signal output from the LED driver control submodule, ensuring that the LED's operating current remains within the set range. This connection method ensures that the system can not only adjust according to light intensity but also dynamically adjust the LED current based on the current signal. Through this design, the system can monitor light intensity in real time while ensuring the stability and accuracy of the current signal, thereby optimizing the overall performance of the LED.

[0068] Next, the output of the current control submodule is electrically connected to the negative feedback terminal of the second feedback regulation submodule. This connection forms a closed-loop feedback circuit, enabling the current control submodule to receive feedback signals in real time and dynamically adjust the current output based on the feedback results. By feeding the current signal back to the second feedback regulation submodule, the current control submodule can quickly adjust according to the actual changes in current, ensuring precise control of the LED current. This feedback mechanism not only improves the system's current control accuracy but also further optimizes the light output stability of the LED.

[0069] Through this circuit connection, the feedback regulation module achieves dual feedback regulation, simultaneously controlling changes in light intensity and current signals. The LED driver control submodule receives the light intensity and current feedback signals, processes them comprehensively, and outputs them to the current control submodule. Ultimately, the feedback loop ensures current stability. The introduction of the current control submodule not only enhances the regulation accuracy of the current signal but also ensures stable light signal output from the LED under various operating conditions.

[0070] The advantage of this multi-stage circuit connection is that the system can flexibly respond to different operating states, providing more precise and stable light emission control through dual feedback adjustment of light intensity and current. Through a closed-loop feedback circuit, the system can dynamically adjust the operating state of the LEDs, avoiding system instability caused by fluctuations in current or light intensity, thereby improving the overall system reliability and accuracy.

[0071] In one possible implementation, such as Figure 2 As shown, the LED driving control submodule includes a fourth operational amplifier U4, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a first transistor Q1, a second capacitor C2, an LED driving signal terminal, and a control signal unit. One end of the seventh resistor R7 is electrically connected to the non-inverting input terminal of the fourth operational amplifier U4, one end of the ninth resistor R9, and the collector of the first transistor Q1. The other end of the seventh resistor R7 is electrically connected to the LED driving signal terminal. One end of the eighth resistor R8 is electrically connected to the inverting input of the fourth operational amplifier U4, and the other end of the eighth resistor R8 is electrically connected to one end of the second capacitor C2. The output of the fourth operational amplifier U4 is simultaneously connected to the input of the current control submodule and the other end of the second capacitor C2; The emitter of the first transistor Q1 is electrically connected to the other end of the ninth resistor R9; The control signal unit is electrically connected to the base of the first transistor Q1 and is used to control the conduction state of the first transistor Q1.

[0072] In this embodiment, the LED driving control submodule, through the circuit connection of a series of components, realizes the adjustment and control of the LED driving signal, ensuring that the LED's operating state is stable and meets expectations. This submodule includes a fourth operational amplifier U4, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a first transistor Q1, a second capacitor C2, an LED driving signal terminal, and a control signal unit. The synergistic effect between these components forms a stable driving control loop.

[0073] First, one end of the seventh resistor R7 is electrically connected to the non-inverting input of the fourth operational amplifier U4, and simultaneously connected to one end of the ninth resistor R9 and the collector of the first transistor Q1. The other end of R7 is connected to the LED drive signal terminal. This design allows the LED drive signal to enter the non-inverting input of U4 through R7, thereby controlling the LED drive. Through this connection, the system can convert the externally input LED drive signal into an electrical signal suitable for driving the LED. The function of R7 is to limit the current and prevent excessively strong input signals from damaging the circuit. At the same time, the collector of Q1 is connected to R7, allowing Q1 to be turned on according to its operating state when the drive signal arrives.

[0074] One end of the eighth resistor R8 is connected to the inverting input of the fourth operational amplifier U4, and the other end is connected to one end of the second capacitor C2. The configuration of R8 and C2 here forms a feedback loop, ensuring that the gain of U4 is effectively controlled, thereby maintaining a stable output signal. C2 acts as a filter, removing high-frequency noise and ensuring smooth signal transmission. Through this feedback design, U4 can stably process the input signal and output a voltage signal suitable for driving the LED.

[0075] The output of the fourth operational amplifier U4 is simultaneously connected to the input of the current control submodule and the other end of the second capacitor C2. This means that the output signal of U4 is both transmitted to the current control submodule for further current regulation and, through its connection with C2, achieves feedback regulation to further stabilize the output signal. This multi-connection design allows U4 not only to control the drive current of the LED but also to adjust the output in a timely manner based on the feedback signal, ensuring that the LED is always in a stable operating state.

[0076] The emitter of transistor Q1 is connected to the other end of resistor R9, forming the transistor's amplification and control circuit. The base of Q1 is controlled by a control signal unit, determining the transistor's on / off state. The control signal unit is introduced to adjust the conduction or cutoff of Q1 via an external signal, thereby achieving real-time control of the LED drive. When Q1 is on, current flows through Q1 into the LED, driving it to emit light; when Q1 is off, the current is blocked, and the LED stops working. Through this design, the system can flexibly control the LED's on and off states, ensuring accurate response under different operating conditions.

[0077] In one possible implementation, such as Figure 2 As shown, the current control submodule includes a second transistor Q2, a third transistor Q3, a tenth resistor R10, an eleventh resistor R11, a first diode D1, and a control signal unit. The base of the second transistor Q2 is electrically connected to the other end of the LED drive control submodule, the collector of the second transistor Q2 is electrically connected to the cathode of the LED, and the emitter of the second transistor Q2 is simultaneously electrically connected to one end of the tenth resistor R10 and the collector of the third transistor Q3. The other end of the tenth resistor R10 is electrically connected to the positive terminal of the first diode D1; The cathode of the first diode D1 is electrically connected to the base of the third transistor Q3 through the control signal unit; The control signal unit is used to control the conduction state of the third transistor Q3; The emitter of the third transistor Q3 is electrically connected to the negative feedback terminal of the second feedback regulation submodule through the eleventh resistor.

[0078] In this embodiment, the current control submodule is designed with precise circuit connections to ensure the stability and control accuracy of the LED current, avoiding the impact of current fluctuations on the LED's operating state. This submodule includes a second transistor Q2, a third transistor Q3, a tenth resistor R10, an eleventh resistor R11, a first diode D1, and a control signal unit. The rational layout and coordinated operation of these components form a closed-loop current control circuit, ensuring that the system can accurately adjust the LED current under various operating conditions.

[0079] First, the base of the second transistor Q2 is connected to the other end of the LED driver control submodule. This connection ensures that Q2 can receive signals from the driver control module, thereby controlling the LED's operating current according to the signal strength. The collector of Q2 is connected to the LED's cathode, directly participating in the LED's current control. Through this design, Q2 can regulate the current flowing through the LED during operation, ensuring the stability of the light output. Simultaneously, the emitter of Q2 is connected to one end of the tenth resistor R10, and also to the collector of the third transistor Q3. This connection forms a current transmission path, ensuring that the LED's current can be effectively controlled and regulated.

[0080] The other end of the tenth resistor R10 is electrically connected to the positive terminal of the first diode D1. The function of R10 is to limit the current flowing through Q2, preventing excessive current from causing system instability or damage. Through the current-limiting effect of R10, the current flowing through the LED in the system is ensured to always be within a safe range, thereby protecting the normal operation of the circuit. Simultaneously, the first diode D1 plays a reverse-phase protection role in this circuit; its negative terminal is connected to the base of the third transistor Q3 through the control signal unit. The design of D1 ensures that when the current direction or voltage polarity changes, the diode can prevent reverse current from damaging the transistor and the circuit.

[0081] The control signal unit controls the conduction state of transistor Q3 by controlling its base. The conduction or cutoff state of Q3 determines the current flow in the system, thus affecting the operating current of the LED. When the control signal unit determines that Q3 needs to be turned on, a path is formed between the collector and emitter of Q3, allowing current to flow smoothly through the LED; conversely, when Q3 is in the cutoff state, the current path is blocked, and the LED stops working. This design ensures that the system can flexibly and accurately control the operating state of the LED, thereby achieving precise current regulation.

[0082] Furthermore, the emitter of the third transistor Q3 is connected to the negative feedback terminal of the second feedback regulation submodule via the eleventh resistor R11. This feedback loop design ensures that the system can adjust the LED current in real time based on the feedback information. R11, as a current-limiting resistor, further ensures safe current transmission and prevents excessive current from affecting the feedback loop. Through this closed-loop feedback control mechanism, the system can dynamically adjust the LED's operating current, ensuring its stability under various loads and operating conditions.

[0083] Reference Figure 3 , Figure 3 This is a circuit diagram of the voltage input unit provided by the present invention.

[0084] In one possible implementation, the voltage input unit includes: a digital-to-analog converter, a twelfth resistor R12, a thirteenth resistor R13, and a fifth operational amplifier U5; The output of the digital-to-analog converter is electrically connected to one end of the twelfth resistor R12; The other end of the twelfth resistor R12 and one end of the thirteenth resistor R13 are both electrically connected to the inverting input of the fifth operational amplifier U5; The other end of the thirteenth resistor R13 is electrically connected to the output of the fifth operational amplifier U5. The output of the fifth operational amplifier U5 is electrically connected to one end of the fourth resistor R4.

[0085] In this embodiment, the voltage input unit achieves precise regulation and control of the input voltage through a combination of a digital-to-analog converter (DAC), a resistor network, and an operational amplifier, ensuring that the voltage signal can be used stably and reliably for subsequent processing of the system. The voltage input unit includes a DAC, a twelfth resistor R12, a thirteenth resistor R13, and a fifth operational amplifier U5, which, through appropriate circuit connections, form a stable voltage regulation circuit.

[0086] First, the digital-to-analog converter (DAC) is responsible for converting the input digital signal into an analog voltage signal. This process is crucial because the system needs to control the output voltage via digital input, and the DAC converts the digital signal into an analog signal that can be processed by subsequent circuitry. The output of the DAC is electrically connected to one end of the twelfth resistor R12, which acts as a current limiter, ensuring that the current output from the DAC is not excessive, thereby protecting subsequent circuit components from damage.

[0087] The other end of the twelfth resistor R12 and one end of the thirteenth resistor R13 are both connected to the inverting input of the fifth operational amplifier U5. This connection design forms a negative feedback network. The parallel connection of R12 and R13 is used to adjust the gain of U5 to ensure that the input analog signal is stably amplified during transmission. The introduction of the negative feedback loop ensures the stability of operational amplifier U5, enabling it to amplify the received signal appropriately and avoid system instability caused by excessively large or small signals. Through this circuit, the system can stably regulate the input voltage, ensuring its accuracy and reliability.

[0088] The other end of the thirteenth resistor R13 is connected to the output of the fifth operational amplifier U5, thus forming a complete feedback loop. The function of R13 is to further adjust the gain of U5, ensuring that the output voltage signal accurately reflects changes in the input signal. This feedback control allows U5 to appropriately amplify and stabilize the input signal, thereby generating a precise output voltage. Through the synergistic effect of R12 and R13, the circuit ensures that the input signal remains stable under different load conditions, preventing voltage fluctuations from affecting the operation of subsequent circuits.

[0089] The output of the fifth operational amplifier U5 is electrically connected to one end of the fourth resistor R4, ensuring that the amplified voltage signal can be stably transmitted to the next stage circuit. U5 plays a crucial role here in voltage signal regulation and amplification, providing a reliable foundation for the system's voltage control through precise control and stable output. The function of R4 is to further limit the current during transmission, preventing excessive current from entering subsequent control loops and ensuring system safety.

[0090] It should be noted that the voltage input unit can also be configured with a separate negative -2.5V power supply.

[0091] Reference Figure 4 , Figure 4 This is a circuit diagram of the control signal unit provided by the present invention.

[0092] In one possible implementation, such as Figure 4 As shown, the control signal unit includes an optical signal acquisition and amplification subunit and a signal comparison and output subunit; One end of the optical signal acquisition and amplification subunit is electrically connected to one end of the signal comparison and output subunit. It is used to acquire the optical signal of the light-emitting diode and convert it into an electrical signal, amplify the electrical signal, and output the amplified electrical signal to the signal comparison and output subunit. The signal comparison and output subunit is used to compare the amplified electrical signal with a preset reference voltage and generate an output signal.

[0093] In this embodiment, the control signal unit is designed to consist of a light signal acquisition and amplification subunit and a signal comparison and output subunit. Through reasonable circuit connections, it achieves precise monitoring and feedback adjustment of the LED's operating state. This control signal unit can not only acquire and amplify the light signal from the LED, but also compare the amplified signal with a reference voltage to generate a feedback signal, ensuring the stability of the LED's light output.

[0094] First, the optical signal acquisition and amplification subunit is used to acquire optical signals from the LED and convert them into electrical signals. The acquisition subunit is designed based on a photoelectric converter, such as a photodiode, to convert the optical signal into a corresponding electrical signal. This electrical signal is then transmitted to an amplification circuit for amplification to ensure sufficient signal strength for subsequent signal processing. The amplified electrical signal is output from the subunit and transmitted through circuitry to the signal comparison and output subunit for further processing. This circuit connection ensures that the optical signal from the LED is accurately acquired and that the amplification circuit enhances the signal strength, preventing signal distortion or attenuation during transmission.

[0095] The signal comparison and output subunit is responsible for comparing the amplified signal from the optical signal acquisition and amplification subunit with a preset reference voltage. This subunit compares the amplified electrical signal with the reference voltage in the system using a comparator or operational amplifier. By comparing the voltage corresponding to the optical signal with the preset standard, the system can determine whether the light output of the current LED is within the set range. If the signal deviates from the set value, the system will generate an output signal to adjust the operating state of the LED. This comparison process is the core of the control signal generation, ensuring that the system can make feedback adjustments based on actual changes in light intensity.

[0096] The optical signal acquisition and amplification subunit is directly connected to the signal comparison and output subunit, ensuring that the converted and amplified optical signal is immediately transmitted to the comparison unit for processing. This direct connection design reduces potential interference during signal transmission and ensures the real-time performance and accuracy of signal processing. Through this tight circuit connection, the entire control signal unit can achieve continuous monitoring and real-time feedback of the LED's light output.

[0097] The advantage of this circuit design lies in its ability to rapidly respond to changes in the light intensity of the LED through real-time acquisition, amplification, and comparison of the optical signal, ensuring stable output. The optical signal acquisition and amplification subunit provides precise monitoring of the LED's light output, while the signal comparison and output subunit achieves feedback regulation of the optical signal by comparing it with a reference voltage. The system can promptly adjust upon receiving a deviation signal, preventing the light output from becoming too strong or too weak, thus ensuring the stability of the analog system under different conditions.

[0098] In one possible implementation, such as Figure 4 As shown, the optical signal acquisition and amplification subunit includes a second silicon photovoltaic cell PC2, a sixth operational amplifier U6, a seventh operational amplifier U7, a fourteenth resistor R14, a fifteenth resistor R15, a third capacitor C3, and a fourth capacitor C4. The output of the second silicon photovoltaic cell PC2 is electrically connected to the inverting input of the sixth operational amplifier U6; The inverting input terminal of the sixth operational amplifier U6 is electrically connected to the output terminal of the sixth operational amplifier U6 through the third capacitor C3 and the fourteenth resistor R14 connected in parallel. The output of the sixth operational amplifier U6 is simultaneously connected to one end of the fifteenth resistor R15 and the non-inverting input of the seventh operational amplifier U7 through the fourth capacitor C4. The inverting input terminal of the seventh operational amplifier U7 is electrically connected to the output terminal of the seventh operational amplifier U7.

[0099] In this embodiment, the optical signal acquisition and amplification subunit is designed to acquire and amplify the optical signal from the LED through efficient circuit connections, ensuring signal strength and stability for subsequent signal comparison and output. This subunit includes a second silicon photovoltaic cell PC2, a sixth operational amplifier U6, a seventh operational amplifier U7, a fourteenth resistor R14, a fifteenth resistor R15, a third capacitor C3, and a fourth capacitor C4. These components are precisely connected through circuitry to form a stable optical signal acquisition and amplification system.

[0100] First, the output of the second silicon photovoltaic cell PC2 is electrically connected to the inverting input of the sixth operational amplifier U6. PC2 is responsible for converting the light signal from the LED into an electrical signal for subsequent processing. As a photoelectric conversion device, PC2 can capture the light output of the LED and convert it into an electrical signal proportional to the light intensity. This electrical signal enters the signal processing circuit of the operational amplifier through its connection with U6.

[0101] To ensure signal stability during transmission and amplification, the inverting input of the sixth operational amplifier U6 is electrically connected to its output via a parallel connection of the third capacitor C3 and the fourteenth resistor R14. This feedback structure allows the circuit to stably amplify the input signal and limit the amplification gain. R14 acts as gain control, limiting the amplification factor of U6 and preventing signal distortion, while C3 filters out high-frequency noise, ensuring signal smoothness. This feedback loop enhances the system's amplification accuracy for weak optical signals while avoiding signal interference caused by noise.

[0102] The output of the sixth operational amplifier U6 is connected via the fourth capacitor C4 to one end of the fifteenth resistor R15 and the non-inverting input of the seventh operational amplifier U7. C4 further filters the signal, removing residual high-frequency noise and ensuring sufficient stability of the signal transmitted to U7. R15 limits the current flowing through the input of U7, preventing damage to the operational amplifier due to excessive current. This design allows the system to stably transmit the initially amplified electrical signal to the second-stage amplifier for further processing.

[0103] Operational amplifier U7, acting as the second-stage amplifier, further amplifies the signal to ensure sufficient strength for subsequent comparison units. The inverting input of operational amplifier U7 is connected to its output, forming a negative feedback loop. This feedback loop controls the gain of U7, preventing over-amplification and ensuring the stability of the output signal. The design of U7 guarantees high precision and low noise in the amplified signal, providing a reliable electrical signal for subsequent signal comparison and output.

[0104] The advantage of this circuit connection is that, through the coordinated operation of the two operational amplifier stages, the system can perform multi-level amplification of the optical signal, ensuring optimal signal strength and stability. The filtering function of the third capacitor C3 and the fourth capacitor C4 effectively removes high-frequency noise, preventing signal interference during transmission and amplification. Simultaneously, the current limiting effect of the fourteenth resistor R14 and the fifteenth resistor R15 prevents damage to the amplifier or other components caused by excessive current.

[0105] In one possible implementation, such as Figure 4 As shown, the signal comparison and output subunit includes a reference voltage input terminal, a pull-up voltage input terminal, an eighth operational amplifier U8, a sixteenth resistor R16, and a seventeenth resistor R17. The reference voltage input is electrically connected to the non-inverting input of the eighth operational amplifier U8 through the sixteenth resistor R16; The inverting input of the eighth operational amplifier U8 is electrically connected to the output of the optical signal acquisition and amplification subunit; The pull-up voltage input terminal is electrically connected to the output terminal of the eighth operational amplifier U8 through the seventeenth resistor R17, which is used to pull up the low level output of the eighth operational amplifier U8 to the pull-up voltage level.

[0106] In this embodiment, the signal comparison and output subunit achieves accurate comparison between the optical signal and the reference voltage through reasonable circuit connections, ultimately generating an output signal to control the operation of the LED. This subunit includes a reference voltage input terminal, a pull-up voltage input terminal, an eighth operational amplifier U8, a sixteenth resistor R16, and a seventeenth resistor R17. The connections between these components ensure the stability and accuracy of the signal processing.

[0107] First, the reference voltage input is electrically connected to the non-inverting input of the eighth operational amplifier U8 via the sixteenth resistor R16. The reference voltage is the reference voltage used by the system to evaluate whether the light output of the LED is within a predetermined range. Through the connection of R16, the reference voltage can be stably transmitted to the non-inverting input of U8, thus providing a standard for signal comparison. R16 here acts as a current limiter and signal stabilizer, preventing the reference voltage signal from being too large or fluctuating excessively, which could affect the normal operation of U8. With this design, the system can always maintain a stable reference voltage, serving as an important basis for judging whether the optical signal meets expectations.

[0108] Meanwhile, the inverting input of the eighth operational amplifier U8 is connected to the output of the optical signal acquisition and amplification subunit. This design aims to introduce the amplified optical signal into U8 for real-time comparison with a reference voltage. As the core comparator, U8's task is to accurately compare the input optical signal with the reference voltage. If the amplified optical signal is greater than or less than the reference voltage, U8 will output a corresponding high-level or low-level signal. This design enables the system to respond quickly to changes in the optical signal and adjust the operating state of the LEDs accordingly.

[0109] To ensure that the signal output from the eighth operational amplifier U8 can drive subsequent circuitry, the pull-up voltage input is connected to the output of U8 via the seventeenth resistor R17. The pull-up voltage is used to raise the low-level signal output by U8 to a suitable voltage level, ensuring the output signal has sufficient strength to drive the subsequent circuitry. R17 acts as a current limiter, ensuring that the pull-up process does not cause excessive current surges that could affect system stability. Through this connection, when U8 outputs a low level, R17 pulls the signal up to the pull-up voltage level, ensuring that the output signal meets the system's voltage level requirements.

[0110] The principle behind this circuit connection is that U8 acts as an operational amplifier, comparing the input optical signal and the reference voltage signal in real time. Combined with a pull-up voltage, this ensures a sufficiently strong output signal. The reference voltage provides a stable benchmark for signal comparison, while the pull-up voltage guarantees the validity of the output signal. The operational amplifier, through the current-limiting effect of R16 and R17, ensures the stability of both input and output signals and prevents excessive current from damaging the system.

[0111] The advantage of this design lies in its ability to achieve real-time monitoring and feedback adjustment of the optical signal through a precise signal comparison mechanism. By comparing the optical signal with the reference voltage using the eighth operational amplifier U8, the system can determine whether the light intensity of the LED meets expectations and generate corresponding control signals to adjust the LED's operating state. Furthermore, the combination of the pull-up voltage input and the seventeenth resistor R17 ensures that the output signal strength is sufficient to effectively drive subsequent control circuitry.

[0112] This application also provides a multi-path optical system feedback adjustment method, applied to the circuit of any of the above embodiments, referring to... Figure 5 The diagram illustrates a flowchart of a multi-path optical system feedback adjustment method provided by the present invention, the method comprising steps 1-3: Step 1: Collect the light signal emitted by the device under test through the light-emitting driver module, and drive the light-emitting diode to work based on the light signal.

[0113] Step 2: Monitor the working status of the LED through the feedback adjustment module, where the working status includes luminous intensity and current intensity.

[0114] Step 3: The first feedback adjustment submodule adjusts the LED based on the luminous intensity, and the second feedback adjustment submodule adjusts the LED based on the current intensity.

[0115] In one possible implementation, step 3 specifically includes the following steps: The first silicon photovoltaic cell PC1 receives the light signal emitted by the light-emitting diode and converts the light signal into an electrical signal.

[0116] The electrical signal is transmitted to the inverting input of the first operational amplifier U1 for amplification, and then transmitted to the second operational amplifier U2 through the first resistor R1.

[0117] The output signal of the second operational amplifier U2 is used to adjust the light intensity of the LED to keep the light intensity of the LED within a preset range.

[0118] The detected LED current signal is input to the second operational amplifier U2 through the voltage input unit to obtain the processed current signal.

[0119] The processed current signal is further processed by the third operational amplifier U3, and the processed current signal is adjusted based on the second resistor R2, the fourth resistor R4 and the first capacitor C1 to generate a feedback signal.

[0120] The third operational amplifier U3 adjusts the current intensity of the LED based on the feedback signal so that the current flowing through the LED is within a set range.

[0121] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention 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; and these 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 the present invention.

Claims

1. A blood oxygenation simulation system based on a multi-path optical system feedback adjustment circuit, characterized in that, include: Light-emitting driver module, feedback adjustment module, and light-emitting diode; The feedback adjustment module includes a first feedback adjustment submodule and a second feedback adjustment submodule; The light-emitting driving module is electrically connected to the first end of the light-emitting tube and is used to collect the light signal emitted by the device under test and drive the light-emitting tube to emit light. One end of the first feedback adjustment submodule is electrically connected to one end of the second feedback adjustment submodule; The first feedback adjustment submodule is used to adjust the light-emitting diode according to the light-emitting intensity of the light-emitting diode; The second feedback adjustment submodule is used to adjust the light-emitting diode based on the current intensity flowing through it.

2. The blood oxygen simulation system based on a multi-path optical system feedback adjustment circuit according to claim 1, characterized in that, The first feedback adjustment submodule includes: a first silicon photovoltaic cell PC1, a first operational amplifier U1, a second operational amplifier U2, a first resistor R1, a second resistor R2, and a third resistor R3; The inverting input terminal of the first operational amplifier U1 is simultaneously electrically connected to one end of the first resistor R1 and the output terminal of the first silicon photovoltaic cell PC1; The other end of the first resistor R1 and the non-inverting input terminal of the second operational amplifier U2 are both electrically connected to the output terminal of the first operational amplifier U1; One end of the second resistor R2 is electrically connected to the inverting input terminal of the second operational amplifier U2, and the other end of the second resistor R2 is electrically connected to the output terminal of the second operational amplifier U2; One end of the third resistor R3 is electrically connected to the output terminal of the second operational amplifier U2.

3. The blood oxygen simulation system based on a multi-path optical system feedback adjustment circuit according to claim 1, characterized in that, The second feedback regulation submodule includes: a voltage input unit, a second operational amplifier U2, a third operational amplifier U3, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a first capacitor C1; One end of the second resistor R2 is electrically connected to the inverting input terminal of the second operational amplifier U2, and the other end of the second resistor R2 is electrically connected to the output terminal of the second operational amplifier U2; One end of the third resistor R3 is electrically connected to the output terminal of the second operational amplifier U2; One end of the fourth resistor R4 is electrically connected to the voltage input unit, and the other end of the fourth resistor R4 is simultaneously electrically connected to the inverting input terminal of the third operational amplifier U3 and one end of the first capacitor C1. At the same time, the fourth resistor R4 is electrically connected to the output terminal of the third operational amplifier U3 through the first capacitor C1. One end of the sixth resistor R6 is electrically connected to the output terminal of the third operational amplifier U3; One end of the fifth resistor R5 is simultaneously electrically connected to the other end of the sixth resistor R6 and the inverting input terminal of the second operational amplifier U2.

4. The blood oxygen simulation system based on a multi-path optical system feedback adjustment circuit according to claim 1, characterized in that, The feedback adjustment module further includes: a light-emitting diode drive control submodule and a current control submodule; One end of the LED driving control submodule is electrically connected to the output terminal of both the first feedback adjustment submodule and the second feedback adjustment submodule, and the other end of the LED driving control submodule is electrically connected to the input terminal of the current control submodule. The output terminal of the current control submodule is electrically connected to the negative feedback terminal of the second feedback regulation submodule.

5. The blood oxygen simulation system based on a multi-path optical system feedback adjustment circuit according to claim 4, characterized in that, The LED driving control submodule includes a fourth operational amplifier U4, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a first transistor Q1, a second capacitor C2, an LED driving signal terminal, and a control signal unit. One end of the seventh resistor R7 is electrically connected to the non-inverting input terminal of the fourth operational amplifier U4, one end of the ninth resistor R9, and the collector of the first transistor Q1; the other end of the seventh resistor R7 is electrically connected to the LED driving signal terminal. One end of the eighth resistor R8 is electrically connected to the inverting input terminal of the fourth operational amplifier U4, and the other end of the eighth resistor R8 is electrically connected to one end of the second capacitor C2. The output terminal of the fourth operational amplifier U4 is simultaneously electrically connected to the input terminal of the current control submodule and the other end of the second capacitor C2; The emitter of the first transistor Q1 is electrically connected to the other end of the ninth resistor R9; The control signal unit is electrically connected to the base of the first transistor Q1 and is used to control the conduction state of the first transistor Q1.

6. The blood oxygen simulation system based on a multi-path optical system feedback adjustment circuit according to claim 4, characterized in that, The current control submodule includes a second transistor Q2, a third transistor Q3, a tenth resistor R10, an eleventh resistor R11, a first diode D1, and a control signal unit. The base of the second transistor Q2 is electrically connected to the other end of the LED driving control submodule, the collector of the second transistor Q2 is electrically connected to the cathode of the LED, and the emitter of the second transistor Q2 is simultaneously electrically connected to one end of the tenth resistor R10 and the collector of the third transistor Q3. The other end of the tenth resistor R10 is electrically connected to the positive terminal of the first diode D1; The cathode of the first diode D1 is electrically connected to the base of the third transistor Q3 through the control signal unit; The control signal unit is used to control the conduction state of the third transistor Q3; The emitter of the third transistor Q3 is electrically connected to the negative feedback terminal of the second feedback regulation submodule through the eleventh resistor.

7. The blood oxygen simulation system based on a multi-path optical system feedback adjustment circuit according to claim 3, characterized in that, The voltage input unit includes: a digital-to-analog converter, a twelfth resistor R12, a thirteenth resistor R13, and a fifth operational amplifier U5; The output terminal of the digital-to-analog converter is electrically connected to one end of the twelfth resistor R12; The other end of the twelfth resistor R12 and one end of the thirteenth resistor R13 are both electrically connected to the inverting input of the fifth operational amplifier U5; The other end of the thirteenth resistor R13 is electrically connected to the output terminal of the fifth operational amplifier U5. The output terminal of the fifth operational amplifier U5 is electrically connected to one end of the fourth resistor R4.

8. The blood oxygen simulation system based on a multi-path optical system feedback adjustment circuit according to any one of claims 5 and 6, characterized in that, The control signal unit includes an optical signal acquisition and amplification subunit and a signal comparison and output subunit; One end of the optical signal acquisition and amplification subunit is electrically connected to one end of the signal comparison and output subunit, and is used to acquire the optical signal of the light-emitting diode and convert it into an electrical signal, amplify the electrical signal, and output the amplified electrical signal to the signal comparison and output subunit. The signal comparison and output subunit is used to compare the amplified electrical signal with a preset reference voltage to generate an output signal.

9. The blood oxygenation simulation system based on a multi-path optical system feedback adjustment circuit according to claim 8, characterized in that, The optical signal acquisition and amplification subunit includes a second silicon photovoltaic cell PC2, a sixth operational amplifier U6, a seventh operational amplifier U7, a fourteenth resistor R14, a fifteenth resistor R15, a third capacitor C3, and a fourth capacitor C4. The output terminal of the second silicon photovoltaic cell PC2 is electrically connected to the inverting input terminal of the sixth operational amplifier U6; The inverting input terminal of the sixth operational amplifier U6 is electrically connected to the output terminal of the sixth operational amplifier U6 through the third capacitor C3 and the fourteenth resistor R14 connected in parallel. The output terminal of the sixth operational amplifier U6 is simultaneously connected to one end of the fifteenth resistor R15 and the non-inverting input terminal of the seventh operational amplifier U7 through the fourth capacitor C4; The inverting input terminal of the seventh operational amplifier U7 is electrically connected to the output terminal of the seventh operational amplifier U7.

10. The blood oxygen simulation system based on a multi-path optical system feedback adjustment circuit according to claim 8, characterized in that, The signal comparison and output subunit includes a reference voltage input terminal, a pull-up voltage input terminal, an eighth operational amplifier U8, a sixteenth resistor R16, and a seventeenth resistor R17; The reference voltage input terminal is electrically connected to the non-inverting input terminal of the eighth operational amplifier U8 through the sixteenth resistor R16; The inverting input terminal of the eighth operational amplifier U8 is electrically connected to the output terminal of the optical signal acquisition and amplification subunit; The pull-up voltage input terminal is electrically connected to the output terminal of the eighth operational amplifier U8 through the seventeenth resistor R17, and is used to pull up the low level output by the eighth operational amplifier U8 to the pull-up voltage level.

11. The blood oxygen simulation system based on a multi-path optical system feedback adjustment circuit according to claim 1, characterized in that, The light-emitting driving module includes a data acquisition submodule, an output submodule, and a data processing submodule; One end of the acquisition submodule is electrically connected to the first end of the data processing submodule, and is used to acquire the optical signal emitted by the device under test and input the optical signal to the data processing submodule. The first end of the output submodule is electrically connected to the second end of the data processing submodule, and the second end of the output submodule is electrically connected to the first end of the light-emitting diode; The data processing submodule is used to modulate the optical signal and transmit the processed optical signal to the light-emitting tube through the output submodule to drive the light-emitting tube to emit light.

12. A feedback adjustment method for a multi-path optical system, characterized in that, The method, applied to the blood oxygen simulation system based on a multi-path optical system feedback adjustment circuit as described in any one of claims 1-11, comprises: The light-emitting driving module acquires the light signal emitted by the device under test, and drives the light-emitting diode to work based on the light signal; The feedback adjustment module monitors the operating status of the LED, wherein the operating status includes luminous intensity and current intensity; The first feedback adjustment submodule adjusts the light-emitting diode based on the light intensity, and the second feedback adjustment submodule adjusts the light-emitting diode based on the current intensity.

13. The method according to claim 12, characterized in that, The first feedback adjustment submodule adjusts the light-emitting diode based on the luminous intensity, specifically including: The first silicon photovoltaic cell PC1 receives the light signal emitted by the light-emitting diode and converts the light signal into an electrical signal; The electrical signal is transmitted to the inverting input of the first operational amplifier U1 for amplification, and then transmitted to the second operational amplifier U2 through the first resistor R1. The output signal of the second operational amplifier U2 is used to adjust the light intensity of the LED to keep the light intensity of the LED within a preset range.

14. The method according to claim 12, characterized in that, The second feedback adjustment submodule adjusts the LED based on the current intensity, specifically including: The detected LED current signal is input to the second operational amplifier U2 through the voltage input unit to obtain the processed current signal; The processed current signal is further processed by the third operational amplifier U3, and the processed current signal is adjusted based on the second resistor R2, the fourth resistor R4 and the first capacitor C1 to generate a feedback signal. The third operational amplifier U3 adjusts the current intensity of the LED based on the feedback signal so that the current flowing through the LED is within a set range.

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