A circuit for optical power meter parameter adjustment

Abstract

This utility model discloses a circuit for adjusting parameters of an optical power meter, belonging to the field of optical power meter adjustment technology. It aims to solve the problem that the resistance-temperature characteristics of adjustable potentiometers are relatively poor. When the operating temperature environment of the instrument changes, the current change caused by the change in the resistance of the adjustable potentiometer, after amplification, results in significant parameter drift, affecting test accuracy and customer experience. The key technical point is that it includes a control circuit. One end of the control circuit is electrically connected to a microcontroller 1 for debugging the device. One end of the microcontroller 1 is electrically connected to a display 1 for displaying the status of the debugging device. The other end of the microcontroller 1 is connected to a power supply and communication via a Type-C interface and electrically connected to a microcontroller 2 for debugging the product. One end of the microcontroller 2 is electrically connected to a display 2 for displaying the status of the product being debugged. This corrects the parameter dispersion of the photodiode and avoids the temperature drift effect caused by the adjustable potentiometer.

Description

Technical Field

[0001] This utility model relates to the technical field of optical power meter adjustment circuits, and in particular to a circuit for adjusting the parameters of an optical power meter. Background Technology

[0002] The instrument used for optical power meter testing and optical isolation film testing works by using a photodiode to convert the received optical signal into an electrical signal. After being processed by an A / D conversion module, the data is sent to a microcontroller for analysis and processing, and the LCD displays the data.

[0003] Because photodiodes exhibit parameter dispersion when used in batches, the current signals they generate when receiving a standard light source are inconsistent. Consequently, the data received by the microcontroller is also inconsistent. Modifying the program of a single microcontroller to achieve a standard output display signal is too costly due to the debugging and programming involved. Therefore, adjustable potentiometers are generally used to adjust the output current parameters of the photodiode after receiving a standard light source, thus achieving a standard output display.

[0004] The existing technical solutions mentioned above have the following drawbacks: In actual use, the current signal converted by the photodiode after receiving the signal is relatively weak, and the data needs to be amplified before it can be displayed as a standard data. However, the resistance temperature characteristics of the adjustable potentiometer are relatively poor. When the temperature environment of the instrument changes, the current change caused by the change in the resistance of the adjustable potentiometer will cause significant parameter drift after amplification, which affects the test accuracy and customer experience. Utility Model Content

[0005] The purpose of this invention is to provide a circuit for adjusting the parameters of an optical power meter.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A circuit for adjusting the parameters of an optical power meter includes a control circuit. One end of the control circuit is electrically connected to a microcontroller 1 for a debugging device. One end of the microcontroller 1 is electrically connected to a display 1 for displaying the status of the debugging device. The other end of the microcontroller 1 is connected to a power supply and communication via a TYPE-C port and is electrically connected to a microcontroller 2 for debugging the product. One end of the microcontroller 2 is electrically connected to a display 2 for displaying the status of the debugging product, and the other end of the microcontroller 2 is electrically connected to a signal acquisition circuit. An AC / DC conversion circuit for power conversion is provided outside the control circuit, the microcontroller 1, and the display 1.

[0008] By adopting the above technical solution, the increase and decrease of data can be controlled by buttons, which is simple and easy to understand. Compared with modifying the program of a single microcontroller to complete the standard signal comparison for output display, it reduces the labor cost of parameter debugging and the training cost of operators. By adjusting the parameter settings in the microcontroller, the parameter dispersion of the photodiode can be corrected, avoiding the temperature drift caused by the adjustable potentiometer.

[0009] Furthermore, the AC / DC conversion circuit includes a power conversion module PS1, which converts the 220V 50Hz power frequency into a stable low voltage signal.

[0010] By adopting the above technical solution, the AC / DC conversion circuit converts the 220V 50Hz power frequency into a stable low voltage signal for use in microcontrollers, control circuits, display circuits, and signal acquisition circuits.

[0011] Furthermore, the control circuit is provided with five groups;

[0012] The control circuit of the first group includes a normally open push button switch SW1. One end of the normally open push button switch SW1 is electrically connected to a filter electrolytic capacitor C1, and the other end of the normally open push button switch SW1 is electrically connected to a pull-down resistor R1. The other end of the normally open push button switch SW1, the other end of the filter electrolytic capacitor C1, and one end of the pull-down resistor R1 are electrically connected, and the other end of the pull-down resistor R1 is grounded.

[0013] The control circuit of the second group includes a pull-up resistor R2. The other end of the pull-up resistor R2 is electrically connected to a filter capacitor C3 and a normally open push button switch SW2. The other ends of the filter capacitor C3 and the normally open push button switch SW2 are electrically connected and grounded.

[0014] The control circuit in the third group includes a pull-up resistor R3. The other end of the pull-up resistor R3 is electrically connected to a filter capacitor C5 and a normally open push button switch SW3. The other ends of the filter capacitor C5 and the normally open push button switch SW3 are electrically connected to and grounded.

[0015] The control circuit in the fourth group includes a pull-up resistor R4. The other end of the pull-up resistor R4 is electrically connected to a filter capacitor C6 and a normally open push button switch SW5. The other ends of the filter capacitor C6 and the normally open push button switch SW4 are electrically connected to and grounded.

[0016] The control circuit in the fifth group includes a pull-up resistor R5. The other end of the pull-up resistor R5 is electrically connected to a filter capacitor C7 and a normally open push button switch SW5. The other ends of the filter capacitor C7 and the normally open push button switch SW5 are electrically connected to and grounded.

[0017] By adopting the above technical solution, the data to be adjusted can be set via button switches, such as parameter reset, selection, increase, decrease, and confirmation.

[0018] Furthermore, the circuit of the microcontroller 1 includes a TYPE-C interface U1, one end of which is electrically connected to the microcontroller U3. Pin 2 of the microcontroller U3 is electrically connected to pin 2 of the TYPE-C interface U1, pin 3 of the microcontroller U3 is electrically connected to pin 3 of the TYPE-C interface U1, pin 4 of the TYPE-C interface U1 is grounded, pin 4 of the microcontroller U3 is electrically connected to a load capacitor C2 and a crystal oscillator Y1, the other end of the load capacitor C2 is grounded, pin 5 of the microcontroller U3 is electrically connected to a load capacitor C4, pin 5 of the microcontroller U3, one end of the load capacitor C4, and the other end of the crystal oscillator Y1 are electrically connected, the other end of the load capacitor C4 is grounded, pin 10 of the microcontroller U3 is grounded, and pin 20 of the microcontroller U3 is electrically connected to a power supply filter capacitor C9, the other end of the power supply filter capacitor C9 is grounded.

[0019] Pin 15 of the microcontroller U3, one end of the normally open push button switch SW5, the other end of the pull-up resistor R5, and one end of the filter capacitor C7 are electrically connected.

[0020] Pin 14 of the microcontroller U3, one end of the normally open push button switch SW4, the other end of the pull-up resistor R4, and one end of the filter capacitor C6 are electrically connected.

[0021] Pin 13 of the microcontroller U3, one end of the normally open push button switch SW3, the other end of the pull-up resistor R3, and one end of the filter capacitor C5 are electrically connected.

[0022] Pin 12 of the microcontroller U3, one end of the normally open push button switch SW2, the other end of the pull-up resistor R2, and one end of the filter capacitor C3 are electrically connected.

[0023] Pin 1 of the microcontroller U3, the other end of the normally open push button switch SW1, the other end of the filter electrolytic capacitor C1, and one end of the pull-down resistor R1 are electrically connected.

[0024] The display circuit of the display 1 includes a control circuit U2, and the display 1 is an OLED monochrome liquid crystal display screen.

[0025] By adopting the above technical solution, the microcontroller 1 processes the signals of the control circuit and displays the data and control results for the operator to confirm. The final confirmation result is transmitted to the microcontroller of the debugging product via TYPE-C, and the display 1 displays the adjusted parameters and the processed result data.

[0026] Furthermore, the circuit of the microcontroller 2 includes a microcontroller U8. Pin 13 of the microcontroller U8 is electrically connected to a power filter capacitor C12, and the other end of the power filter capacitor C12 is grounded. Pin 37 of the microcontroller U8 is electrically connected to a pull-up resistor R11, and pin 38 of the microcontroller U8 is electrically connected to a pull-up resistor R10. Pin 41 of the microcontroller U8 is electrically connected to a TYPE-C interface U9. Pin 2 of the TYPE-C interface U9 is electrically connected to pin 41 of the microcontroller U8, pin 3 of the TYPE-C interface U9 is electrically connected to pin 42 of the microcontroller U8, pin 4 of the TYPE-C interface U9 is grounded, and pins 9 and 40 of the microcontroller U8 are grounded.

[0027] By adopting the above technical solution, the TYPE-C power supply and communication will transmit the debugging result parameter data through the communication protocol and provide power to the product being debugged.

[0028] Furthermore, the signal acquisition circuit internally includes a power supply filter capacitor C8 and a photodiode U5. One end of the power supply filter capacitor C8 is electrically connected to an operational amplifier U4. The other ends of the power supply filter capacitor C8 and the operational amplifier U4 are electrically connected and grounded. One end of the photodiode U5 is electrically connected to an operational amplifier U4A, a feedback capacitor C10, and a feedback resistor R8. The other end of the photodiode U5 is electrically connected to an operational amplifier U4A, voltage divider resistors R6 and R7, and an operational amplifier U4B. One end of the photodiode U5, pin 2 of the operational amplifier U4A, one end of the feedback capacitor C10, and one end of the feedback resistor R8 are electrically connected. The other end of the operational amplifier U4A is electrically connected to an operational amplifier output resistor R. 9. Pin 1 of the operational amplifier U4A, the other end of the feedback resistor R8, the other end of the feedback capacitor C10, and one end of the operational amplifier output resistor R9 are electrically connected. The other end of the operational amplifier output resistor R9 is electrically connected to the output filter capacitor C11 and the A / D conversion integrated circuit U7. The other end of the output filter capacitor C11 is grounded. The other end of the photodiode U5, pin 5 of the operational amplifier U4B, pin 3 of the operational amplifier U4A, one end of the voltage divider resistor R6, and one end of the voltage divider resistor R7 are electrically connected. The other end of the voltage divider resistor R7 is grounded. Pins 6 and 7 of the operational amplifier U4B and pin 6 of the A / D conversion integrated circuit U7 are electrically connected. Pin 2 of the A / D conversion integrated circuit U7 is grounded.

[0029] The circuit of the display 2 includes a display control circuit U6, and the display 2 is an LCD screen with missing characters.

[0030] By adopting the above technical solution, the microcontroller 2 receives and processes the data transmitted from the photodiode, receives the data transmitted from the debugging device, receives and processes the data transmitted from other functional blocks, controls the LCD to display the necessary parameters and data, and the display 2 displays the parameters and data that need to be tested and displayed, such as optical power and optical isolation rate.

[0031] In summary, the beneficial technical effects of this utility model are as follows:

[0032] 1. Control the increase and decrease of data by pressing the buttons, observe the changes of data on the display screen, confirm the data after reaching the expected data, and finally input the set data to the product being debugged through the communication channel between the microcontrollers to complete the parameter debugging of the product.

[0033] 2. The operation is simple and easy to understand. Compared with modifying the program of a single microcontroller to complete the standard signal comparison for output display, it reduces the labor cost of parameter debugging and the training cost of operators. By adjusting the parameter settings in the microcontroller, the parameter dispersion of the photodiode can be corrected, avoiding the temperature drift caused by the adjustable potentiometer.

[0034] 3. The AC / DC conversion circuit converts the 220V 50Hz power frequency into a stable low-voltage signal for use by the microcontroller, control circuit, display circuit, and signal acquisition circuit. The control circuit sets the data to be adjusted via push-button switches, such as parameter reset, selection, increase, decrease, and confirmation. Microcontroller 1 processes the signals from the control circuit and displays the data and control results for operator confirmation. The final confirmation result is transmitted to the microcontroller of the product being debugged via TYPE-C. Display 1 displays the adjusted parameters and the processed data. The TYPE-C connection transmits the power and communication debugging result parameters and data through the communication protocol and provides power to the product being debugged.

[0035] 4. The microcontroller 2 receives and processes the data transmitted from the photodiode, the data transmitted from the debugging device, and the data transmitted from other function blocks. It controls the LCD to display necessary parameters and data. The signal acquisition circuit converts the light signal received by the photodiode into a current signal, processes it into a voltage signal, amplifies it, and converts it into a digital signal through the A / D conversion circuit. The display 2 displays the parameters and data that need to be tested and displayed, such as optical power and optical isolation rate. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0037] Figure 2This is a schematic diagram of the power conversion circuit of this utility model;

[0038] Figure 3 This is a schematic diagram of the control circuit of this utility model;

[0039] Figure 4 This is a schematic diagram of the single-chip microcomputer 1 circuit of this utility model;

[0040] Figure 5 This is a schematic diagram of the display circuit of the display 1 of this utility model;

[0041] Figure 6 This is a schematic diagram of the single-chip microcomputer circuit of this utility model;

[0042] Figure 7 This is a schematic diagram of the signal acquisition circuit of this utility model;

[0043] Figure 8 This is a schematic diagram of the display circuit of the display 2 of this utility model. Detailed Implementation

[0044] The present invention will be further described in detail below with reference to the accompanying drawings.

[0045] Reference Figure 1 A circuit for adjusting the parameters of an optical power meter includes a control circuit. One end of the control circuit is electrically connected to a microcontroller 1 for a debugging device. One end of the microcontroller 1 is electrically connected to a display 1 for displaying the status of the debugging device. The other end of the microcontroller 1 is connected to a power supply and communication via a TYPE-C interface and is electrically connected to a microcontroller 2 for debugging the product. One end of the microcontroller 2 is electrically connected to a display 2 for displaying the status of the debugging product, and the other end of the microcontroller 2 is electrically connected to a signal acquisition circuit. An AC / DC conversion circuit for power conversion is provided outside the control circuit, the microcontroller 1, and the display 1.

[0046] Reference Figure 2 The AC / DC conversion circuit includes a power conversion module PS1, which converts 220V 50Hz power supply into a stable low-voltage signal for use in microcontrollers, control circuits, display circuits, and signal acquisition circuits.

[0047] Reference Figure 3 The control circuit has five sets;

[0048] The first control circuit includes a normally open push button switch SW1. One end of the normally open push button switch SW1 is electrically connected to a filter electrolytic capacitor C1, and the other end of the normally open push button switch SW1 is electrically connected to a pull-down resistor R1. The other end of the normally open push button switch SW1, the other end of the filter electrolytic capacitor C1, and one end of the pull-down resistor R1 are electrically connected, and the other end of the pull-down resistor R1 is grounded.

[0049] The second control circuit includes a pull-up resistor R2. The other end of the pull-up resistor R2 is electrically connected to a filter capacitor C3 and a normally open push button switch SW2. The other ends of the filter capacitor C3 and the normally open push button switch SW2 are electrically connected to and grounded.

[0050] The third control circuit includes a pull-up resistor R3. The other end of the pull-up resistor R3 is electrically connected to a filter capacitor C5 and a normally open push button switch SW3. The other ends of the filter capacitor C5 and the normally open push button switch SW3 are electrically connected to and grounded.

[0051] The fourth control circuit includes a pull-up resistor R4. The other end of the pull-up resistor R4 is electrically connected to a filter capacitor C6 and a normally open push button switch SW5. The other ends of the filter capacitor C6 and the normally open push button switch SW4 are electrically connected and grounded.

[0052] The fifth control circuit includes a pull-up resistor R5. The other end of the pull-up resistor R5 is electrically connected to a filter capacitor C7 and a normally open push-button switch SW5. The other ends of the filter capacitor C7 and the normally open push-button switch SW5 are electrically connected and grounded. The control circuit sets the data to be adjusted through the push-button switches, such as parameter reset, selection, increase, decrease, and confirmation. SW1~SW5 are normally open push-button switches. When the button is pressed, the circuit is short-circuited; when the button is released, the circuit is open. C1 is a filter electrolytic capacitor, and C3, C5, C6, and C7 are filter capacitors to prevent signal glitches in the circuit when the button is pressed and released, which would affect signal judgment. R1 is a pull-down resistor, and R2, R3, R4, and R5 are pull-up resistors to prevent the signal from being in a high-impedance state due to floating, thereby preventing the circuit from becoming unstable.

[0053] Reference Figure 4 and Figure 5 The circuit of microcontroller 1 includes a TYPE-C interface U1, one end of which is electrically connected to microcontroller U3. Pin 2 of microcontroller U3 is electrically connected to pin 2 of TYPE-C interface U1, pin 3 of microcontroller U3 is electrically connected to pin 3 of TYPE-C interface U1, pin 4 of TYPE-C interface U1 is grounded, pin 4 of microcontroller U3 is electrically connected to load capacitor C2 and crystal oscillator Y1, the other end of load capacitor C2 is grounded, pin 5 of microcontroller U3 is electrically connected to load capacitor C4, pin 5 of microcontroller U3, one end of load capacitor C4, and the other end of crystal oscillator Y1 are electrically connected, the other end of load capacitor C4 is grounded, pin 10 of microcontroller U3 is grounded, and pin 20 of microcontroller U3 is electrically connected to power filter capacitor C9, the other end of power filter capacitor C9 is grounded.

[0054] Pin 15 of the microcontroller U3, one end of the normally open push button switch SW5, the other end of the pull-up resistor R5, and one end of the filter capacitor C7 are electrically connected.

[0055] Pin 14 of the microcontroller U3, one end of the normally open push button switch SW4, the other end of the pull-up resistor R4, and one end of the filter capacitor C6 are electrically connected.

[0056] Pin 13 of the microcontroller U3, one end of the normally open push button switch SW3, the other end of the pull-up resistor R3, and one end of the filter capacitor C5 are electrically connected.

[0057] Pin 12 of the microcontroller U3, one end of the normally open push button switch SW2, the other end of the pull-up resistor R2, and one end of the filter capacitor C3 are electrically connected.

[0058] Pin 1 of the microcontroller U3, the other end of the normally open push button switch SW1, the other end of the filter electrolytic capacitor C1, and one end of the pull-down resistor R1 are electrically connected.

[0059] The display circuit of display 1 includes a control circuit U2 for display 1. Display 1 uses an OLED monochrome LCD screen. U1 is a TYPE-C interface, which is smaller in size than other USB interfaces. Y1 is a crystal oscillator that provides a stable external frequency for the microcontroller. C2 and C4 are load capacitors that help the crystal oscillator reach the necessary electric field strength at startup by storing and releasing charge, thereby enabling it to start oscillating. U3 is a microcontroller whose function is data acquisition, processing, and control. C9 is a power supply filter capacitor. U2 is the circuit for controlling the display. The display screen used is an OLED monochrome LCD screen.

[0060] Reference Figure 6 The internal circuit of microcontroller 2 includes microcontroller U8. Pin 13 of microcontroller U8 is electrically connected to power supply filter capacitor C12, with the other end of C12 grounded. Pin 37 of microcontroller U8 is electrically connected to pull-up resistor R11, and pin 38 of microcontroller U8 is electrically connected to pull-up resistor R10. Pin 41 of microcontroller U8 is electrically connected to TYPE-C interface U9. Pin 2 of TYPE-C interface U9 is electrically connected to pin 41 of microcontroller U8, and pin 3 of TYPE-C interface U9 is electrically connected to pin 42 of microcontroller U8. Pin 4 of interface U9 is grounded, and pins 9 and 40 of microcontroller U8 are grounded. U8 is the microcontroller, which collects and processes the signal from the photodiode, saves the data sent by the debugging device, and controls the parameter display and data display of the display. C12 is the power supply filter capacitor, and R10 and R11 are pull-up resistors used to receive the data sent by the photodiode and stabilize the signal. U9 is the TYPE-C interface, which is the interface for the debugging device.

[0061] Reference Figure 7 and Figure 8 The signal acquisition circuit includes a power supply filter capacitor C8 and a photodiode U5. One end of the power supply filter capacitor C8 is electrically connected to operational amplifier U4. The other ends of the power supply filter capacitor C8 and operational amplifier U4C are electrically connected and grounded. One end of the photodiode U5 is electrically connected to operational amplifier U4A, feedback capacitor C10, and feedback resistor R8. The other end of the photodiode U5 is electrically connected to operational amplifier U4A, voltage divider resistors R6 and R7, and operational amplifier U4B. One end of the photodiode U5, pin 2 of operational amplifier U4A, one end of feedback capacitor C10, and one end of feedback resistor R8 are electrically connected. The other end of operational amplifier U4A is electrically connected to operational amplifier output resistor R9. Pin 1 of operational amplifier U4A, the other end of feedback resistor R8, the other end of feedback capacitor C10, and one end of operational amplifier output resistor R9 are electrically connected. The other end of operational amplifier output resistor R9 is electrically connected to output filter capacitor C11 and A / D conversion integrated circuit U7. The other end of output filter capacitor C11 is grounded. The other end of photodiode U5, pin 5 of operational amplifier U4B, pin 3 of operational amplifier U4A, one end of voltage divider resistor R6, and one end of voltage divider resistor R7 are electrically connected. The other end of voltage divider resistor R7 is grounded. Pins 6 and 7 of operational amplifier U4B are electrically connected to pin 6 of A / D conversion integrated circuit U7. Pin 2 of A / D conversion integrated circuit U7 is grounded.

[0062] The circuit of display 2 includes display control circuit U6, display 2 is an LCD screen with broken codes, C8 is power supply filter capacitor, U5 is photodiode, such as infrared receiver tube, ultraviolet receiver tube, etc., U4 is operational amplifier to amplify weak signals, R6 and R7 are voltage divider resistors to form a reference voltage, R8 is feedback resistor, C10 is feedback capacitor, R9 is operational amplifier output resistor, C11 is output filter capacitor, and U7 is 16-bit A / D conversion integrated circuit;

[0063] A / D conversion circuit: Also known as an "analog-to-digital converter" or simply an "analog-to-digital converter," it is a circuit that quantizes (discretizes) analog quantities or continuously changing quantities and converts them into corresponding digital quantities. A / D conversion consists of three parts: sampling, quantization, and encoding. Generally, quantization and encoding are performed simultaneously. Sampling is the process of discretizing the analog signal in time, quantization is the process of discretizing the analog signal in amplitude, and encoding refers to representing each quantized sample value with a specific binary code.

[0064] An adjustable potentiometer is an adjustable electronic component consisting of a body and a rotating or sliding system.

[0065] The temperature characteristic of a resistor is usually described by the temperature coefficient (TCR), which defines the percentage or percentage change in resistance with temperature. The principle behind the change in resistance with temperature is based on the temperature dependence of the material. Different materials have different temperature coefficients of resistance, depending on their physical and electrical properties. Generally, the resistance of a metal resistor increases with increasing temperature because the resistance of a metal is positively correlated with temperature; that is, the higher the temperature, the more electron collisions and impurity scattering occur in the metal, leading to an increase in resistance. On the other hand, some materials have a negative temperature coefficient, meaning their resistance decreases with increasing temperature.

[0066] The implementation principle of this embodiment is as follows: the AC / DC conversion circuit converts 220V... The 50Hz power frequency is converted into a stable low-voltage signal for use by the microcontroller, control circuit, display circuit, and signal acquisition circuit. The control circuit sets the data to be adjusted via push-button switches, such as parameter reset, selection, increase, decrease, and confirmation. Microcontroller 1 processes the signals from the control circuit and displays the data and control results for operator confirmation. The final confirmation result is transmitted to the microcontroller of the product being debugged via TYPE-C. Display 1 displays the adjusted parameters and the processed data. The TYPE-C connection transmits the power and communication debugging result parameters and data through the communication protocol and provides power to the product being debugged. Microcontroller 2 receives and processes the data transmitted from the photodiode, the debugging device, and other functional blocks, and controls the LCD to display the necessary parameters and data. The signal acquisition circuit converts the light signal received by the photodiode into a current signal, processes it into a voltage signal, amplifies it, and converts it into a digital signal through an A / D conversion circuit. Display 2 displays the parameters and data to be tested and displayed, such as optical power and optical isolation rate.

[0067] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A circuit for adjusting parameters of an optical power meter, comprising a control circuit, characterized in that: One end of the control circuit is electrically connected to a microcontroller 1 for debugging devices. One end of the microcontroller 1 is electrically connected to a display 1 for displaying the status of the debugging devices. The other end of the microcontroller 1 is connected to a power supply and communication via a TYPE-C port and is electrically connected to a microcontroller 2 for debugging products. One end of the microcontroller 2 is electrically connected to a display 2 for displaying the status of the debugging products, and the other end of the microcontroller 2 is electrically connected to a signal acquisition circuit. An AC / DC conversion circuit for power conversion is provided outside the control circuit, microcontroller 1, and display 1.

2. The circuit for adjusting the parameters of an optical power meter according to claim 1, characterized in that: The AC / DC conversion circuit includes a power conversion module PS1, which converts 220V 50Hz power frequency into a stable low voltage signal.

3. The circuit for adjusting the parameters of an optical power meter according to claim 2, characterized in that: The control circuit is provided with five groups; The control circuit of the first group includes a normally open push button switch SW1. One end of the normally open push button switch SW1 is electrically connected to a filter electrolytic capacitor C1, and the other end of the normally open push button switch SW1 is electrically connected to a pull-down resistor R1. The other end of the normally open push button switch SW1, the other end of the filter electrolytic capacitor C1, and one end of the pull-down resistor R1 are electrically connected, and the other end of the pull-down resistor R1 is grounded. The control circuit of the second group includes a pull-up resistor R2. The other end of the pull-up resistor R2 is electrically connected to a filter capacitor C3 and a normally open push button switch SW2. The other ends of the filter capacitor C3 and the normally open push button switch SW2 are electrically connected and grounded. The control circuit in the third group includes a pull-up resistor R3. The other end of the pull-up resistor R3 is electrically connected to a filter capacitor C5 and a normally open push button switch SW3. The other ends of the filter capacitor C5 and the normally open push button switch SW3 are electrically connected to and grounded. The control circuit in the fourth group includes a pull-up resistor R4. The other end of the pull-up resistor R4 is electrically connected to a filter capacitor C6 and a normally open push button switch SW5. The other ends of the filter capacitor C6 and the normally open push button switch SW4 are electrically connected to and grounded. The control circuit in the fifth group includes a pull-up resistor R5. The other end of the pull-up resistor R5 is electrically connected to a filter capacitor C7 and a normally open push button switch SW5. The other ends of the filter capacitor C7 and the normally open push button switch SW5 are electrically connected to and grounded.

4. The circuit for adjusting the parameters of an optical power meter according to claim 3, characterized in that: The circuit of the microcontroller 1 includes a TYPE-C interface U1. One end of the TYPE-C interface U1 is electrically connected to the microcontroller U3. Pin 2 of the microcontroller U3 is electrically connected to pin 2 of the TYPE-C interface U1. Pin 3 of the microcontroller U3 is electrically connected to pin 3 of the TYPE-C interface U1. Pin 4 of the TYPE-C interface U1 is grounded. Pin 4 of the microcontroller U3 is electrically connected to a load capacitor C2 and a crystal oscillator Y1. The other end of the load capacitor C2 is grounded. Pin 5 of the microcontroller U3 is electrically connected to a load capacitor C4. Pin 5 of the microcontroller U3, one end of the load capacitor C4, and the other end of the crystal oscillator Y1 are electrically connected. The other end of the load capacitor C4 is grounded. Pin 10 of the microcontroller U3 is grounded. Pin 20 of the microcontroller U3 is electrically connected to a power supply filter capacitor C9. The other end of the power supply filter capacitor C9 is grounded. Pin 15 of the microcontroller U3, one end of the normally open push button switch SW5, the other end of the pull-up resistor R5, and one end of the filter capacitor C7 are electrically connected. Pin 14 of the microcontroller U3, one end of the normally open push button switch SW4, the other end of the pull-up resistor R4, and one end of the filter capacitor C6 are electrically connected. Pin 13 of the microcontroller U3, one end of the normally open push button switch SW3, the other end of the pull-up resistor R3, and one end of the filter capacitor C5 are electrically connected. Pin 12 of the microcontroller U3, one end of the normally open push button switch SW2, the other end of the pull-up resistor R2, and one end of the filter capacitor C3 are electrically connected. Pin 1 of the microcontroller U3, the other end of the normally open push button switch SW1, the other end of the filter electrolytic capacitor C1, and one end of the pull-down resistor R1 are electrically connected. The display circuit of the display 1 includes a control circuit U2, and the display 1 is an OLED monochrome liquid crystal display screen.

5. The circuit for adjusting the parameters of an optical power meter according to claim 4, characterized in that: The circuit of the microcontroller 2 includes a microcontroller U8. Pin 13 of the microcontroller U8 is electrically connected to a power filter capacitor C12, and the other end of the power filter capacitor C12 is grounded. Pin 37 of the microcontroller U8 is electrically connected to a pull-up resistor R11, and pin 38 of the microcontroller U8 is electrically connected to a pull-up resistor R10. Pin 41 of the microcontroller U8 is electrically connected to a TYPE-C interface U9. Pin 2 of the TYPE-C interface U9 is electrically connected to pin 41 of the microcontroller U8, pin 3 of the TYPE-C interface U9 is electrically connected to pin 42 of the microcontroller U8, pin 4 of the TYPE-C interface U9 is grounded, and pins 9 and 40 of the microcontroller U8 are grounded.

6. The circuit for adjusting the parameters of an optical power meter according to claim 5, characterized in that: The signal acquisition circuit internally includes a power supply filter capacitor C8 and a photodiode U5. One end of the power supply filter capacitor C8 is electrically connected to an operational amplifier U4. The other ends of the power supply filter capacitor C8 and operational amplifier U4 are electrically connected and grounded. One end of the photodiode U5 is electrically connected to an operational amplifier U4A, a feedback capacitor C10, and a feedback resistor R8. The other end of the photodiode U5 is electrically connected to an operational amplifier U4A, voltage divider resistors R6 and R7, and an operational amplifier U4B. One end of the photodiode U5, pin 2 of the operational amplifier U4A, one end of the feedback capacitor C10, and one end of the feedback resistor R8 are electrically connected. The other end of the operational amplifier U4A is electrically connected to an operational amplifier output resistor R9. The operational amplifier U4A's pin 1, the other end of feedback resistor R8, the other end of feedback capacitor C10, and one end of operational amplifier output resistor R9 are electrically connected. The other end of operational amplifier output resistor R9 is electrically connected to output filter capacitor C11 and A / D conversion integrated circuit U7. The other end of output filter capacitor C11 is grounded. The other end of photodiode U5, operational amplifier U4B's pin 5, operational amplifier U4A's pin 3, one end of voltage divider resistor R6, and one end of voltage divider resistor R7 are electrically connected. The other end of voltage divider resistor R7 is grounded. Operational amplifier U4B's pins 6 and 7 are electrically connected to A / D conversion integrated circuit U7's pin 6. The A / D conversion integrated circuit U7's pin 2 is grounded. The circuit of the display 2 includes a display control circuit U6, and the display 2 is an LCD screen with missing characters.

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