Optical image acquisition control system and method for flight device in complex light scene

Abstract

The invention discloses an optical image acquisition control system and method of a complex light scene flight device, the optical image acquisition control system of the complex light scene flight device comprises a light detection circuit, and the light detection circuit comprises a feedback end used for acquiring light parameters; the main control chip comprises a first control end and a first receiving end, the first receiving end is electrically connected with the feedback end, and the main control chip is used for generating a driving signal according to the light parameters collected by the light detection circuit; the driving circuit comprises a second control end and a first output end, the second control end is electrically connected with the first control end, and the first output end is used for being electrically connected with the electrochromic filter; wherein the main control chip outputs corresponding driving signals to the second control end according to different light parameters of the light detection circuit, and the driving circuit dynamically controls the light transmittance of the electrochromic filter through different driving signals received by the second control end.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicles, and in particular to an optical image acquisition control system and method for a flying device with complex light scenes. Background Art

[0002] With the rapid development of drone technology, drones are increasingly used in aerial photography, monitoring, surveying and mapping. In order to meet the needs of image acquisition in complex environments, drones are usually equipped with high-performance camera equipment. During flight, drones need to cope with complex and changing lighting conditions, such as strong light, shadows, and dark weather. They need to quickly and accurately adjust the light intensity entering the lens, which can easily lead to overexposure or underexposure of the image, thus affecting the image quality.

[0003] In the related technology, the variable neutral density (VND) filter is an optical element that controls the amount of light entering the lens by adjusting the transmittance, and is widely used in the fields of photography and videography. By changing the neutral density (ND) value, the VND filter can adjust different exposure effects. In traditional designs, VND filters usually work in a fixed manual adjustment or preset parameter mode to meet the requirements of exposure conditions.

[0004] However, traditional VND filters usually rely on the control of preset parameters. This method usually relies on the control of preset parameters, lacks linkage with the light sensing system, and cannot intelligently adjust the transmittance according to the rapid changes in ambient light, resulting in unstable image quality. Summary of the invention

[0005] The main purpose of the present invention is to propose an optical image acquisition and control system for a flying device in complex light scenes, aiming to solve the problem that traditional VND filters cannot intelligently adjust the transmittance according to the rapid changes in ambient light.

[0006] To achieve the above-mentioned purpose, the present invention proposes an optical image acquisition control system for a complex light scene flying device, the optical image acquisition control system for the complex light scene flying device comprising: A light detection circuit, comprising a feedback end, wherein the light detection circuit is used to collect light parameters; A main control chip, comprising a first control end and a first receiving end, wherein the first receiving end is electrically connected to the feedback end, and the main control chip is used to generate a driving signal according to the light parameters collected by the light detection circuit; A driving circuit, comprising a second control end and a first output end, wherein the second control end is electrically connected to the first control end, and the first output end is used to electrically connect to the electrochromic filter; The main control chip outputs corresponding driving signals to the second control end according to different light parameters of the light detection circuit, and the driving circuit dynamically controls the light transmittance of the electrochromic filter through different driving signals received by the second control end.

[0007] In some embodiments, the optical detection circuit further comprises: A light sensing chip, comprising a second receiving end and a first connecting end, wherein the first connecting end is electrically connected to the feedback end; A light collection module, the light collection module is electrically connected to the second receiving end, and the light collection module is used to generate different currents according to the light; The light sensing chip is configured to generate different light parameters according to different analog signals of the light collection module, and transmit the light parameters to the main control chip through the first connection end.

[0008] In some embodiments, the light collection module includes: A photosensitive device, wherein an anode of the photosensitive device is electrically connected to a power source; A load resistor, wherein a first end of the load resistor is electrically connected to the cathode of the photosensitive device, and a second end of the load resistor is electrically connected to the second receiving end.

[0009] In some embodiments, the light collection module further includes a second resistor, a first end of the second resistor is electrically connected to a second end of the load resistor, and a second end of the second resistor is grounded, wherein the second resistor and the load resistor form a voltage divider module.

[0010] In some embodiments, the light collection module further includes a first capacitor, one end of the first capacitor is electrically connected to the first end of the second resistor, and the other end of the first capacitor is grounded.

[0011] In some embodiments, the light sensing chip further includes a first communication terminal; The optical detection circuit further includes a wireless transmission module, which is electrically connected to the first communication end and is used for wirelessly transmitting or receiving light parameters.

[0012] In some embodiments, the wireless transmission module includes a first inductor, a second capacitor and a third capacitor, one end of the first inductor is electrically connected to the first communication end, the other end of the first inductor is used to electrically connect to the antenna, and one end of the first inductor and the other end of the first inductor are grounded via the second capacitor and the third capacitor respectively.

[0013] In some embodiments, the main control chip includes a third control terminal; The driving circuit comprises: A voltage control circuit, comprising an input terminal, a second communication terminal, a second output terminal and a third output terminal, wherein the input terminal is electrically connected to a power supply, the second communication terminal is electrically connected to the second control terminal, and the voltage control circuit is used to boost the power supply voltage, generate a first target voltage to output to the second output terminal, and output a second target voltage to the third output terminal; A push-pull circuit, comprising a fourth control end, a second connection end, a third connection end and a fourth connection end, wherein the fourth control end is electrically connected to the third control end, the second connection end is electrically connected to the second output end, the third connection end is electrically connected to the third output end, and the fourth connection end is electrically connected to the first output end; The push-pull circuit is configured to operate based on the second target voltage, and to control the frequency and duty cycle of the first target voltage output according to different PWM signals of the fourth control terminal, so as to adjust the transmittance of the electrochromic filter.

[0014] In some embodiments, the main control chip further includes a third receiving end; The push-pull circuit further includes a feedback module, a detection end of the feedback module is electrically connected to the first output end, and a feedback end of the feedback module is electrically connected to the third receiving end.

[0015] The present invention provides an optical image acquisition control method for a complex light scene flying device, and the electrochromic filter control method includes: Collect scene light parameters; generating a transmittance adjustment signal according to scene light parameters; Analyzing the transmittance adjustment signal to obtain a voltage adjustment parameter and a pulse width adjustment parameter; Obtaining a filter adjustment parameter according to the voltage adjustment parameter and the pulse width adjustment parameter; The light transmittance of the electrochromic filter is adjusted according to the filter adjustment parameter.

[0016] The beneficial effect of the technical solution of the present invention is that: the light parameters are collected by the light detection circuit, the main control chip generates a driving signal according to the light parameters, and the driving circuit receives the driving signal through the second control terminal to dynamically control the transmittance of the electrochromic filter, thereby realizing the linkage between light sensing and filter regulation. Compared with the traditional VND filter that relies on preset parameters, the present invention can intelligently adjust the transmittance according to the rapid changes in ambient light. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the electrical connection of modules of an optical image acquisition control system of a flying device in a complex light scene according to an embodiment of the present invention; Figure 2It is a partial circuit diagram of an optical image acquisition control system of a flying device in a complex light scene in one embodiment of the present invention; Figure 3 It is a partial circuit diagram of an optical image acquisition control system of a flying device in a complex light scene in one embodiment of the present invention; Figure 4 It is a partial circuit diagram of an optical image acquisition control system of a flying device in a complex light scene in one embodiment of the present invention; Figure 5 Flow chart of an electrochromic filter control method according to an embodiment of the present invention.

[0018] Description of Figure Numbers: 10. Electrochromic filter; 100, optical detection circuit; A1, feedback terminal; U1, light sensing chip; A2, second receiving end; B1, first connecting end; B2, first communication end; 110. Light collection module; LS1, photosensor; R1, load resistor; A3, first end of load resistor; A4, second end of load resistor; R2, a second resistor; A5, a first end of the second resistor; A6, a second end of the second resistor; C1, first capacitor; 120, wireless transmission module; L1, first inductor; C2, second capacitor; C3, third capacitor; U2, main control chip; B3, first control terminal; A7, first receiving terminal; B4, third control terminal; A8, third receiving terminal; 200, driving circuit; B5, second control terminal; A9, first output terminal; 210, voltage control circuit, A10, input terminal; B6, second communication terminal; A11, second output terminal; A12, third output terminal; 220, voltage doubling rectifier circuit; 230, push-pull circuit, B7, fourth control terminal; B8, second connection terminal; B9, third connection terminal; B10, fourth connection terminal; 231. Feedback module.

[0019] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0020] The scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0022] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0023] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0024] Drones are widely used in aerial photography, monitoring, and mapping, and the quality of their lenses directly affects the imaging effect. Under complex lighting conditions, such as strong light, shadows, and dark weather, traditional variable neutral density (VND) filters usually rely on the control of preset parameters and cannot intelligently adjust the transmittance according to real-time lighting changes. This defect can cause underexposure or overexposure of the image, seriously affecting the image quality. In order to solve this problem, the present invention proposes an optical image acquisition and control system for an electrically induced complex light scene flying device. By combining the light detection circuit, the main control chip, and the drive circuit to achieve linkage with the light sensing system, the transmittance can be intelligently adjusted according to the rapid changes in ambient light, thereby ensuring the stability and clarity of the image quality. For details, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4The embodiment of the present invention provides an optical image acquisition control system for a complex light scene flying device, and the optical image acquisition control system for the complex light scene flying device includes: The light detection circuit 100 includes a feedback terminal A1, and the light detection circuit 100 is used to collect light parameters; The main control chip U2 includes a first control terminal B3 and a first receiving terminal A7, the first receiving terminal A7 is electrically connected to the feedback terminal A1, and the main control chip U2 is used to generate a driving signal according to the light parameters collected by the light detection circuit 100; The driving circuit 200 comprises a second control terminal B5 and a first output terminal A9, wherein the second control terminal B5 is electrically connected to the first control terminal B3, and the first output terminal A9 is used to electrically connect to the electrochromic filter 10; The main control chip U2 outputs corresponding driving signals to the second control terminal B5 according to different light parameters of the light detection circuit 100 , and the driving circuit 200 controls the light transmittance of the electrochromic filter 10 through the different driving signals received by the second control terminal B5 .

[0025] In this embodiment, the function of the light detection circuit 100 is to collect light parameters and provide necessary light information for adjusting the transmittance of the electrochromic filter 10. The circuit can be implemented by combining a photosensitive device LS1 (such as a photodiode, a photoresistor or a phototransistor) with a light sensing chip U1 (such as a light intensity sensor). The light parameters that can be collected by the light detection circuit 100 include information such as light intensity, light distribution, light harmonics (light wave change characteristics), and can convert analog signals into digital signals. For example, the light intensity sensed by the photosensitive device LS1 is processed by the amplification circuit and then input into the light sensing chip U1, and the light sensing chip U1 converts the analog signal into a digital signal and transmits it to the main control chip U2 through the feedback terminal A1.

[0026] The main control chip U2 in this embodiment is used to receive the light parameters collected by the light detection circuit 100 and perform real-time analysis to generate a drive signal for controlling the filter. The main control chip U2 can be implemented using a common embedded microcontroller (such as the STM32 series or the ESP32 series), and its functions include signal reception, data analysis, and drive signal output.

[0027] For example, when the light intensity is less than the first threshold, the main control chip U2 outputs a driving signal to increase the transmittance of the electrochromic filter 10; when the light intensity is greater than the second threshold, it outputs a driving signal to reduce the transmittance of the filter. The intelligent control capability of the main control chip U2 ensures the response speed and accuracy of the filter.

[0028] It should be noted that the driving signal referred to in this embodiment includes a voltage control signal and a PWM signal. The voltage control signal is used to control the driving circuit 200 to generate a corresponding driving voltage, and the PWM signal is used to control the frequency and duty cycle of the driving voltage output by the driving circuit 200.

[0029] The function of the driving circuit 200 is to receive the driving signal generated by the main control chip U2 and convert it into a control voltage or current signal for regulating the transmittance of the electrochromic filter 10. The driving circuit 200 can use a power amplifier circuit or a constant current source circuit to ensure that the filter can respond quickly and work stably. For example, the main control chip U2 outputs different driving signals to the second control terminal B5 through the first control terminal B3, and the driving circuit 200 will output corresponding driving voltages according to different control signals to drive the electrochromic filter 10 to work. At the same time, the main control chip U2 also outputs different PWM signals to the fourth control terminal B7 through the third control terminal B4 to control the frequency and duty cycle of the driving voltage output by the driving circuit 200.

[0030] Taking the drone lens as an application scenario, the control circuit of the electrochromic filter 10 of the present invention works as follows during actual flight: When the drone flies in an environment with strong direct sunlight (such as a sunny noon lighting scene), the light detection circuit 100 detects a parameter with high light intensity and transmits the light intensity information to the main control chip U2 through the feedback terminal A1. The main control chip U2 can determine that the current light is too strong according to the set light intensity threshold, and then output a drive signal to reduce the transmittance to the drive circuit 200. After receiving it, the drive circuit 200 generates a drive voltage to reduce the filter transmittance, driving the color of the electrochromic filter 10 to gradually deepen, thereby reducing the amount of light entering the lens and avoiding image overexposure.

[0031] In outdoor scattered light or a relatively uniform soft light environment (such as a cloudy day or an outdoor soft light environment), the light detection circuit 100 detects that the light intensity is within the normal range. After the main control chip U2 analyzes the light parameters, it determines that there is no need to significantly adjust the filter transmittance, and outputs a drive signal to maintain the current transmittance to the drive circuit 200. The drive circuit 200 converts the signal into a corresponding drive voltage to keep the filter in its current state. At this time, the drone lens can capture images at a better exposure level without being too bright or too dark.

[0032] When the drone flies to a low-light environment (such as at night, deep in the forest, or in the shadow of a building), the light detection circuit 100 detects that the light intensity is lower than the set first threshold and feeds the signal back to the main control chip U2. After analysis, the main control chip U2 outputs a drive signal to increase the filter transmittance to the drive circuit 200, which converts the signal into a corresponding drive voltage to adjust the transmittance of the electrochromic filter 10. As the voltage is adjusted, the color of the electrochromic filter 10 gradually becomes lighter or completely transparent, allowing more light to enter the lens to ensure sufficient imaging brightness. Under this dynamic adjustment, the drone can adapt to low-light environments to capture clear images and avoid loss of details caused by dark images.

[0033] During flight, the drone may frequently pass through areas where light conditions change dramatically, such as between high-rise buildings in the city or in scenes where sunlight and shadows alternate in the forest. At this time, the light detection circuit 100 can sense the rapid changes in light intensity in real time and continuously feed back the parameters to the main control chip U2. The main control chip U2 adjusts the drive signal in real time according to the dynamic changes of light, and the drive circuit 200 responds quickly to match the transmittance of the electrochromic filter 10 with the current light intensity. For example, when the drone flies from a shadow area into a direct sunlight area, the transmittance of the electrochromic filter 10 will decrease in a short time; and when returning from a strong light area to a shadow area, the filter transmittance will increase rapidly. This fast and intelligent adjustment enables the drone to continuously capture clear and stable images in complex light environments.

[0034] When the UAV is used in scenarios that require long-term flight monitoring (such as patrolling or disaster monitoring), the light conditions may undergo gradual changes, such as gradually changing from day to dusk or night. The light detection circuit 100 will periodically collect light intensity, and the main control chip U2 will continuously adjust the drive signal according to different lighting change trends, and control the drive circuit 200 to continuously output the corresponding drive voltage to control the transmittance of the electrochromic filter 10 to ensure that the lens can adapt to the light environment in real time. For long-term monitoring tasks, this dynamic adjustment can significantly improve the mission adaptability of the UAV while reducing the need for image post-processing.

[0035] The beneficial effect of the technical solution of the present invention is that the light parameters are collected by the light detection circuit 100; the main control chip U2 generates a driving signal according to the light parameters; the driving circuit 200 receives the driving signal through the second control terminal B5 to dynamically control the transmittance of the electrochromic filter 10, thereby realizing the linkage between light sensing and filter regulation. Compared with the traditional VND filter that relies on preset parameters, the present invention can intelligently adjust the transmittance according to the rapid changes in ambient light, thereby improving the imaging quality of the drone lens under complex light conditions.

[0036] Continue reading Figure 2In this embodiment, the optical detection circuit 100 further includes: The light sensing chip U1 includes a second receiving terminal A2 and a first connecting terminal B1, wherein the first connecting terminal B1 is electrically connected to the feedback terminal A1; A light collection module 110, the light collection module 110 is electrically connected to the second receiving end A2, and the light collection module 110 is used to generate different analog signals according to the light; The light sensing chip U1 is configured to generate different light parameters according to different analog signals of the light collection module 110 , and transmit the different light parameters to the main control chip U2 through the first connection terminal B1 and the first feedback terminal A1 .

[0037] In this embodiment, the light detection circuit 100 includes a light sensing chip U1 and a light collection module 110, which work together to generate light parameters; Specifically, the light collection module 110 can be used to detect information such as light intensity and spectral distribution in the environment (wherein, spectral information can be indirectly detected through filters, gratings, filter arrays or modulation techniques, etc.), and convert it into different electrical signals. The light collection module 110 can use a variety of photosensitive devices LS1, such as photodiodes, photoresistors or phototransistors. For example, when the light intensity increases, the photosensitive device LS1 will generate a larger photocurrent; conversely, when the light intensity decreases, the photocurrent decreases. In some embodiments, a photosensitive device LS1 that is sensitive to a specific wavelength (such as an infrared photosensitive diode, an ultraviolet light sensor, etc.) can be used to separate spectral components of different wavelengths in the environment, such as visible light, infrared light and ultraviolet light, thereby providing additional information about the quality of the light.

[0038] The analog signal generated by the light collection module 110 is transmitted to the second receiving end A2 through an electrical connection. The light sensing chip U1 is responsible for processing the analog signal generated by the light collection module 110 and converting it into digital light parameters that can be analyzed by the main control chip U2, for example: Analog signal amplification is to amplify the weak electrical signal generated by the light collection module 110 to improve the accuracy and stability of signal processing.

[0039] Signal filtering and calibration, that is, built-in filtering and calibration algorithms, remove environmental noise and interference to ensure that the generated light parameters are more accurate.

[0040] Analog-to-digital conversion (ADC) converts the analog current signal of the light collection module 110 into a digital signal, such as specific parameters such as light intensity value and spectral characteristics.

[0041] For complex light environments, the light sensing chip U1 can simultaneously output multiple light parameters, such as total light intensity, intensity of specific spectra (such as red light, blue light, etc.), to provide more abundant data support for the main control chip U2. The processed light parameters are output through the first connection terminal B1 and transmitted to the main control chip U2 through the feedback terminal A1.

[0042] In this embodiment, through the collaborative work of the light sensing chip U1 and the light collection module 110, multi-dimensional light parameters including light intensity and spectral distribution can be generated. These parameters can provide the main control chip U2 with rich ambient light information, helping it to more accurately generate a drive signal for controlling the electrochromic filter 10, thereby realizing real-time and intelligent optical adjustment functions. In addition, this diverse light parameter generation capability can provide important guarantees for the imaging quality of drone lenses, and also expands the application potential of the light detection circuit 100 in other scenarios (such as smart cameras and autonomous driving vehicles).

[0043] Continue reading Figure 2 In this embodiment, the light collection module 110 includes: A photosensitive device LS1, wherein an anode of the photosensitive device LS1 is electrically connected to a power source; A load resistor R1, a first end A3 of the load resistor is electrically connected to the cathode of the photosensitive device LS1, and a second end A4 of the load resistor is electrically connected to the second receiving end A2.

[0044] In this embodiment, the photosensitive device LS1 in the light collection module 110 is used to detect the intensity of ambient light. In this embodiment, the photosensitive device LS1 can be a photosensitive diode, a photoresistor or a phototransistor, etc., and its anode is electrically connected to a power supply (for example, a 3.3V or 5V power supply). Under light, electron-hole pairs are generated inside the PN junction of the photosensitive device LS1, thereby forming a photocurrent in the circuit. The size of the photocurrent is proportional to the light intensity, so it can reflect the current light intensity.

[0045] Taking the photosensitive device LS1 as a photosensitive diode as an example, when it works in a reverse bias state, the intensity of the photocurrent generated by the photosensitive device LS1 when illuminated is linearly related to the intensity of the incident light, and has a high response speed and linearity. At this time, the load resistor R1 is used to convert the photocurrent generated by the photosensitive device LS1 into a voltage signal. The first end A3 of the load resistor is connected to the cathode of the photosensitive device LS1, and the second end A4 of the load resistor is connected to the second receiving end A2, forming a basic current-voltage conversion circuit.

[0046] In addition to the combination of photosensor LS1 and load resistor R1, light signals can also be collected in other ways, for example, integrated photoelectric sensor modules (such as TSL2591, MAX44009, etc.) can be used. These modules usually integrate photosensors, amplifier circuits and analog-to-digital converters (ADCs) internally. They have high accuracy, good linearity, and can directly output digital signals without load resistor R1 and analog signal processing.

[0047] For another example, a transimpedance amplifier (TIA) is used to directly convert the photocurrent of the photosensitive device LS1 into a voltage signal, thereby eliminating the load resistor R1.

[0048] For example, by integrating photoelectric sensors with multiple sensitive wavelengths, light information of different wavelengths (such as red light, blue light, ultraviolet light, infrared light, etc.) can be collected. These multi-channel data can provide spectral distribution information, not just light intensity, and can be used for color recognition or complex spectral scenes, such as drone spectral imaging tasks.

[0049] This embodiment realizes efficient collection and conversion of light intensity through the combination of the photosensitive device LS1 and the load resistor R1, and the generated voltage signal provides a usable analog input signal for the photosensitive chip U1. This solution is simple in design and low in cost, and is suitable for a wide range of application scenarios.

[0050] Continue reading Figure 2 In this embodiment, the light collection module 110 further includes a second resistor R2, a first end A5 of the second resistor is electrically connected to a second end A4 of the load resistor, and a second end A6 of the second resistor is grounded, wherein the second resistor R2 and the load resistor R1 form a voltage divider module.

[0051] This embodiment introduces a second resistor R2 into the light collection module 110 to form a voltage divider module with the load resistor R1, thereby achieving accurate voltage division and stable processing of the output signal of the photosensitive device LS1. It can effectively adapt to the output signal range of the photosensitive device LS1, enhance signal stability, and protect subsequent circuits from damage caused by excessive voltage.

[0052] Continue reading Figure 2 In this embodiment, the light collection module 110 further includes a first capacitor C1, one end of the first capacitor C1 is electrically connected to the first end A5 of the second resistor, and the other end of the first capacitor C1 is grounded.

[0053] In this embodiment, the light collection module 110 further adds a first capacitor C1, one end of the first capacitor C1 is electrically connected to the first end A5 of the second resistor, and the other end is grounded, and together with the second resistor R2, a low-pass filter circuit is formed. By introducing the first capacitor C1, the analog signal generated by the photosensitive device LS1 can be filtered, the interference of high-frequency noise can be reduced, and the stability and reliability of the signal can be improved.

[0054] Specifically, the combination of the first capacitor C1 and the second resistor R2 forms a simple RC low-pass filter. When the signal generated by the photosensitive device LS1 is divided, it may be affected by high-frequency interference in the environment (such as electromagnetic noise or power supply ripple). These high-frequency components will be superimposed on the analog signal, affecting the signal quality. The first capacitor C1 can short-circuit the high-frequency signal to the ground, and provide a small impedance to the low-frequency signal, thereby achieving attenuation of the high-frequency signal and retaining only the low-frequency signal related to the light intensity.

[0055] By selecting appropriate resistance and capacitance parameters, the filter cutoff frequency can be adjusted to optimize for different noise sources. For example, when filtering high-frequency electromagnetic interference, a smaller capacitance value can be selected to increase the cutoff frequency; while in low-frequency noise scenarios, a larger capacitance value can be selected to extend the retention range of low-frequency signals.

[0056] By introducing the first capacitor C1 into the light collection module 110, filtering of the output signal of the photosensitive device LS1 is achieved, which can reduce the interference of high-frequency noise and enhance the stability and reliability of the signal. This design provides an important guarantee for the collection of light parameters in complex light environments such as drones, while optimizing the overall performance of the system and ensuring the real-time and accuracy of the adjustment of the electrochromic filter 10.

[0057] See also Figure 2 and Figure 3 , in some embodiments, the light sensing chip U1 further includes a first communication terminal B2; The light detection circuit 100 further includes a wireless transmission module 120 . The wireless transmission module 120 is electrically connected to the first communication terminal B2 . The wireless transmission module 120 is used for wirelessly transmitting or receiving light parameters.

[0058] In this embodiment, the light detection circuit 100 further includes a wireless transmission module 120 to achieve wireless transmission and remote control of light parameters. Specifically, the light sensing chip U1 also includes a first communication terminal B2, which is electrically connected to the wireless transmission module 120 and is used to send or receive light parameters. Through the wireless communication function, this embodiment can achieve remote light monitoring and filter adjustment, greatly improving the flexibility and intelligence of the system.

[0059] The wireless transmission module 120 can be a module that supports common wireless communication protocols, such as a Bluetooth module (such as BLE), a Wi-Fi module (such as ESP8266 or ESP32), or a low-power wireless communication module (such as LoRa or ZigBee). Of course, it can also be integrated into the light sensing chip U1.

[0060] The first communication terminal B2 is electrically connected to the wireless transmission module 120. After collecting and generating light parameters, the light sensing chip U1 can send these parameters to the wireless transmission module 120 through the first communication terminal B2, and the wireless transmission module 120 performs wireless broadcasting or point-to-point transmission. Similarly, the wireless transmission module 120 can receive control instructions from an external terminal and transmit them to the light sensing chip U1 through the first communication terminal B2, thereby realizing remote control of the system.

[0061] Exemplarily, in the automatic adjustment mode, the light sensing chip U1 can collect light parameters in real time through the light collection module 110 , and transmit these parameters to a user terminal (such as a mobile phone or a computer) through the wireless transmission module 120 .

[0062] When the drone encounters a situation where the light intensity is constantly changing during flight, the light parameters (such as the current light intensity value or spectral distribution) will be sent to the operation terminal in real time through the wireless transmission module 120. The user can view the light information of the drone's current environment in real time on the terminal interface, thereby better understanding the drone's working status and shooting environment.

[0063] The wireless transmission module 120 can also support receiving light adjustment instructions sent by an external terminal. For example, the user edits specific light parameters (such as target light intensity value or filter transmittance) on the terminal according to actual needs, and transmits these instructions to the light detection circuit 100 through the wireless transmission module 120.

[0064] After receiving the control instruction transmitted by the wireless transmission module 120 , the light sensing chip U1 can generate a new driving signal according to the light parameters set by the user, so as to further adjust the light transmittance of the electrochromic filter 10 .

[0065] In the manual adjustment mode, the user can manually adjust the transmittance of the electrochromic filter 10 through the terminal without directly physically operating the device, thereby achieving more precise control.

[0066] By introducing the wireless transmission module 120, this embodiment adds remote communication and control functions on the basis of the traditional light detection circuit 100, so that the user can check the current light parameters anytime and anywhere, and understand the working status of the device and the ambient light information. At the same time, it can also support sending control instructions through the terminal device to achieve remote adjustment of the filter transmittance, thereby improving the operational convenience and flexibility of the system.

[0067] Reference Figure 2 In some embodiments, the wireless transmission module 120 includes a first inductor L1, a second capacitor C2 and a third capacitor C3, one end of the first inductor L1 is electrically connected to the first communication terminal B2, the other end of the first inductor L1 is used to electrically connect to the antenna, and one end of the first inductor L1 and the other end of the first inductor L1 are grounded via the second capacitor C2 and the third capacitor C3 respectively.

[0068] In this embodiment, the first inductor L1 is mainly used to match the antenna impedance and isolate the DC signal from the high-frequency signal. It can block the DC signal, prevent the DC component of the first communication terminal B2 from being directly transmitted to the antenna (ANT1, ANT2), and protect the wireless transmission module 120. At the same time, the first inductor L1 provides a low-impedance path for the high-frequency signal, ensuring that the RF signal can be efficiently transmitted to the antenna (ANT1, ANT2). The main functions of the second capacitor C2 and the third capacitor C3 are to filter and stabilize the high-frequency signal: The first inductor L1, the second capacitor C2, and the third capacitor C3 together form an LC filtering and impedance matching network to adjust and optimize the RF signal of the wireless transmission module 120. The network can reduce interference during the transmission of RF signals, optimize the transmission efficiency of the signal, and ensure that the matching impedance of the antenna meets the requirements of RF communication, thereby improving the stability and transmission quality of wireless communication.

[0069] See also Figure 2 , Figure 3 and Figure 4 , in this embodiment, the main control chip U2 includes a third control terminal B4; The driving circuit 200 comprises: The voltage control circuit 210 includes an input terminal A10, a second communication terminal B6, a second output terminal A11 and a third output terminal A12. The input terminal A10 is electrically connected to the power supply, the second communication terminal B6 is electrically connected to the second control terminal B5, and the voltage control circuit 210 is used to boost the power supply voltage, generate a first target voltage to output to the second output terminal A11, and output a second target voltage to the third output terminal A12; The push-pull circuit 230 includes a fourth control terminal B7, a second connection terminal B8, a third connection terminal B9 and a fourth connection terminal B10, wherein the fourth control terminal B7 is electrically connected to the third control terminal B4, the second connection terminal B8 is electrically connected to the second output terminal A11, the third connection terminal B9 is electrically connected to the third output terminal A12, and the fourth connection terminal B10 is electrically connected to the first output terminal A9; The push-pull circuit 230 is configured to operate based on the second target voltage and control the frequency and duty cycle of the first target voltage output according to different PWM signals of the fourth control terminal B7 to adjust the transmittance of the electrochromic filter 10 .

[0070] In this embodiment, the driving circuit 200 achieves fine adjustment of multi-level transmittance by adjusting the boost of the power supply voltage, the frequency of outputting the first target voltage, and the duty cycle.

[0071] Specifically, the voltage control circuit 210 includes an input terminal A10, a second communication terminal B6, a second output terminal A11 and a third output terminal A12. Its core function is to boost the power supply voltage and generate two target voltages: The first target voltage is output through the second output terminal A11 and is used as a push-pull circuit 230 to adjust the working voltage of the electrochromic filter 10 .

[0072] The second target voltage is output through the third output terminal A12 and is used to provide a working reference voltage for the push-pull circuit 230 .

[0073] The main control chip U2 sends a driving signal (it should be noted that a voltage control signal is sent) to the voltage control circuit 210 through the second communication terminal B6 (the first control terminal B3 is electrically connected to the second control terminal B5, and the second control terminal B5 is electrically connected to the second communication terminal B6), and dynamically adjusts the output voltage value of the voltage control circuit 210 according to the light data. For example, when the light intensity is weak, the voltage control circuit 210 outputs a higher first target voltage to increase the filter transmittance; otherwise, it outputs a lower first target voltage to reduce the transmittance.

[0074] The push-pull circuit 230 includes a fourth control terminal B7 (the fourth control terminal B7 is electrically connected to the third control terminal B4), a second connection terminal B8, a third connection terminal B9 and a fourth connection terminal B10. The function of the push-pull circuit 230 is to further control the frequency and duty cycle of the first target voltage based on the second target voltage in combination with the PWM signal output by the main control chip U2.

[0075] Specifically, the fourth control terminal B7 receives the PWM signal output by the third control terminal B4, and is used to adjust the output frequency and duty cycle of the first target voltage.

[0076] The second connection terminal B8 and the third connection terminal B9 are respectively connected to the second output terminal A11 and the third output terminal A12 of the voltage control circuit 210 to provide input voltage to the push-pull circuit 230 .

[0077] The fourth connection terminal B10 is connected to the first output terminal A9 and outputs a modulated driving voltage to adjust the light transmittance of the electrochromic filter 10 .

[0078] The push-pull circuit 230 works based on the second target voltage to ensure the overall stability and efficiency of the circuit. According to the different PWM signals output by the main control chip U2, the push-pull circuit 230 modulates the output frequency and duty cycle of the first target voltage. Different frequencies and duty cycles can control the reaction speed and degree of the liquid crystal or electrochromic material in the electrochromic filter 10, thereby achieving multi-level transmittance adjustment.

[0079] Specifically, the main control chip U2 obtains light parameters (such as light intensity) from the light detection circuit 100 and generates different driving signals according to preset logic.

[0080] When the light intensity is weak, the driving signal generated by the main control chip U2 instructs the voltage control circuit 210 to output a higher first target voltage to increase the light transmittance of the filter.

[0081] When the light intensity is strong, the driving signal generated by the main control chip U2 instructs the voltage control circuit 210 to output a lower first target voltage to reduce the filter transmittance.

[0082] The driving signal is transmitted to the voltage control circuit 210 through the second communication terminal B6. The voltage control circuit 210 boosts the power supply voltage to the first target voltage and the second target voltage, which are used for the operation of the push-pull circuit 230 and the filter adjustment respectively. The push-pull circuit 230 dynamically adjusts the frequency and duty cycle of the first target voltage according to the PWM signal output by the main control chip U2.

[0083] Specifically, by changing the frequency of the output voltage, the push-pull circuit 230 can control the response time of the filter material, thereby achieving a fast or slow change in transmittance. At the same time, by changing the duty cycle of the output voltage, the push-pull circuit 230 controls the adjustment depth of the filter material, thereby achieving multi-level transmittance from completely transparent to completely blocked.

[0084] For example, when the light intensity is medium, the driving voltage output by the push-pull circuit 230 has a low frequency and a moderate duty cycle, and the transmittance of the filter is precisely adjusted to an intermediate level suitable for the current environment, ensuring uniform exposure of the picture.

[0085] Through different combinations of voltage, frequency and duty cycle, multi-level changes in filter transmittance can be achieved, providing multiple states from completely transparent to completely blocked.

[0086] Furthermore, the MOSFET Q1 in the push-pull circuit 230 generally requires a higher gate drive voltage (GateDrive Voltage) to switch efficiently. The second target voltage provided by the voltage doubler rectifier circuit 220 can meet the driving requirements of the MOSFET, thereby ensuring the fast response and efficient operation of the push-pull circuit 230.

[0087] Specifically, the voltage control circuit 210 is composed of a buck-boost chip U3 and a voltage doubler rectifier circuit 220, wherein the voltage doubler rectifier circuit 220 is used to generate a second target voltage, and the buck-boost chip U3 is used to generate a first target voltage, and the voltage value of the second target voltage is higher than the voltage value of the first target voltage. The second target voltage is used as the working voltage source of the push-pull circuit 230, thereby effectively driving the normal operation of the push-pull circuit 230. Figure 3 As shown, the voltage doubler rectifier circuit 220 is composed of diodes D2, D3, D4, and D5. The rectification comes from the PWM shape of the inductor L6. The voltage amplitude of this PWM switch waveform is proportional to the output "5V++0". The voltage after voltage doubler is filtered and stabilized to obtain a second target voltage (output from the third output terminal A12) that is 5.6V higher than "5V++0". This voltage is used to drive the output push-pull switch tube Q1 to work.

[0088] See also Figure 3 and Figure 4 In this embodiment, the main control chip U2 also includes a third receiving terminal A8; The push-pull circuit 230 further includes a feedback module 231. The detection end of the feedback module 231 is electrically connected to the first output end A9. Figure 3 The OSC pin in the circuit is electrically connected to the third receiving terminal A8.

[0089] In this embodiment, the feedback end of the feedback module 231 is electrically connected to the third receiving end A8, which is used to transmit the collected voltage signal to the main control chip U2. In this way, the main control chip U2 can monitor the duty cycle, frequency, voltage and other information of the current first target voltage in real time to achieve more precise regulation.

[0090] Specifically, the feedback module 231 may be composed of two resistors connected in series, one of which is connected to the first output terminal A9 and the other is grounded, and the middle node of the series resistors serves as a feedback terminal for outputting a divided signal.

[0091] By appropriately selecting the resistance values ​​of the two resistors, the first target voltage signal can be adjusted to a range suitable for detection by the main control chip U2.

[0092] The main control chip U2 receives the signal from the feedback module 231 through the third receiving terminal A8, and can obtain the following information of the first target voltage in real time: 1. By analyzing the time ratio of the high level and the low level of the input signal, the main control chip U2 can determine whether the output of the push-pull circuit 230 meets the preset duty cycle.

[0093] 2. By measuring the period of the signal, the main control chip U2 can evaluate whether the operating frequency of the push-pull circuit 230 is within the target range.

[0094] 3. Through the divided signal of the feedback module 231, the main control chip U2 can indirectly calculate the actual voltage value of the first target voltage to ensure that it meets the control requirements of the system.

[0095] In some embodiments, the main control chip U2 can determine whether the output state of the current push-pull circuit 230 meets the filter adjustment requirements based on the real-time signal data provided by the feedback module 231. For example, if it is detected that the duty cycle or frequency deviates from the preset value, the main control chip U2 can adjust the PWM signal output to the push-pull circuit 230 to correct the output parameters of the first target voltage. If it is detected that the voltage amplitude does not meet the target range, the main control chip U2 can optimize the first target voltage by adjusting the drive signal of the voltage control circuit 210.

[0096] By introducing the feedback module 231, the main control chip U2 can accurately detect the output parameters (duty cycle, frequency, voltage amplitude, etc.) of the push-pull circuit 230, and make dynamic adjustments according to actual conditions to ensure stable system operation.

[0097] See also Figure 5 The present invention further proposes an optical image acquisition control method for a complex light scene flying device, the optical image acquisition control method for a complex light scene flying device comprising: S100, collecting scene light parameters; S200, generating a transmittance adjustment signal according to scene light parameters; S300, analyzing the transmittance adjustment signal to obtain a voltage adjustment parameter and a pulse width adjustment parameter; S400, obtaining a filter adjustment parameter according to a voltage adjustment parameter and a pulse width adjustment parameter; S500 , adjusting the light transmittance of the electrochromic filter 10 according to the filter adjustment parameter.

[0098] The optical image acquisition control method of the complex light scene flying device in this embodiment is used to intelligently adjust the light transmittance of the electrochromic filter 10 according to the scene light changes to adapt to different lighting conditions. The method includes the following control steps: First, the light acquisition module 110 is used to detect parameters such as the light intensity, light distribution, and spectral characteristics of the current scene in real time. Ambient light information is collected through the photosensitive device LS1 or the multi-spectral sensor, and the collected light analog signal is converted into a digital signal through the photosensitive chip U1, and then the light parameters are transmitted to the main control chip U2 to provide basic data for subsequent filter adjustment. The main control chip U2 parses the collected light parameters and generates a transmittance adjustment signal according to the preset transmittance adjustment rules. For example, when the light intensity is greater than the first threshold, an adjustment signal is generated to reduce the filter transmittance; when the light intensity is less than the second threshold, an adjustment signal is generated to increase the filter transmittance, and the adjustment signal is further optimized according to the light distribution and spectral characteristics.

[0099] Next, the main control chip U2 decomposes the transmittance adjustment signal to obtain specific control parameters, including voltage adjustment parameters and pulse width adjustment parameters. The voltage adjustment parameters are used to adjust the filter drive voltage to control the basic transmittance level of the filter; the pulse width adjustment parameters are used to control the duty cycle and frequency of the PWM signal to finely adjust the dynamic response of the filter transmittance.

[0100] The main control chip U2 calculates the filter adjustment parameters based on the voltage adjustment parameters and the pulse width adjustment parameters, including the amplitude range of the driving voltage, the frequency and duty cycle of the PWM signal, and other control parameters for the specific electrochromic filter 10 material. These adjustment parameters can accurately reflect the target state of the filter under the current light conditions.

[0101] The driving circuit 200 receives the filter adjustment parameters sent by the main control chip U2, and adjusts the transmittance of the electrochromic filter 10 according to the adjustment parameters. The voltage control circuit 210 generates a corresponding target voltage according to the voltage adjustment parameters, and provides a stable operating voltage for the push-pull circuit 230; the push-pull circuit 230 modulates the frequency and duty cycle of the output signal according to the pulse width adjustment parameters, and drives the filter material to respond. The electrochromic filter 10 achieves dynamic adjustment of the transmittance by changing its color depth. For example, in a strong light scene, the driving circuit 200 outputs a signal with a low duty cycle and a low transmittance, which deepens the color of the filter and reduces the amount of light entering the lens; in a weak light scene, the driving circuit 200 outputs a signal with a high duty cycle and a high transmittance, which makes the filter lighter and increases the amount of light transmitted.

[0102] The present invention realizes intelligent dynamic adjustment of filter transmittance by collecting light parameters, generating adjustment signals, analyzing adjustment parameters and driving the electrochromic filter 10. The method can adapt to complex light changes in different scenes, ensure imaging quality, and improve the automation and response efficiency of the system.

[0103] The above description is only a partial or preferred embodiment of the present invention. Neither the text nor the drawings can limit the scope of protection of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the overall concept of the present invention, or direct / indirect application in other related technical fields are included in the scope of protection of the present invention.

Claims

1. An optical image acquisition and control system for a complex light scene flying device, characterized in that: include: A light detection circuit, comprising a feedback end, wherein the light detection circuit is used to collect light parameters; A main control chip, comprising a first control end and a first receiving end, wherein the first receiving end is electrically connected to the feedback end, and the main control chip is used to generate a driving signal according to the light parameters collected by the light detection circuit; A driving circuit, comprising a second control end and a first output end, wherein the second control end is electrically connected to the first control end, and the first output end is used to electrically connect to the electrochromic filter; The main control chip outputs corresponding driving signals to the second control end according to different light parameters of the light detection circuit, and the driving circuit dynamically controls the light transmittance of the electrochromic filter through different driving signals received by the second control end.

2. The optical image acquisition and control system for a complex light scene flying device according to claim 1, characterized in that: The optical detection circuit also includes: A light sensing chip, comprising a second receiving end and a first connecting end, wherein the first connecting end is electrically connected to the feedback end; A light collection module, the light collection module is electrically connected to the second receiving end, and the light collection module is used to generate different analog signals according to the light; The light sensing chip is configured to generate different light parameters according to different analog signals of the light collection module, and transmit the light parameters to the main control chip through the first connection end.

3. The optical image acquisition and control system for a complex light scene flying device according to claim 2, characterized in that: The light collection module comprises: A photosensitive device, wherein an anode of the photosensitive device is electrically connected to a power source; A load resistor, wherein a first end of the load resistor is electrically connected to the cathode of the photosensitive device, and a second end of the load resistor is electrically connected to the second receiving end.

4. The optical image acquisition control system for a complex light scene flying device according to claim 3, characterized in that: The light collection module further includes a second resistor, a first end of the second resistor is electrically connected to a second end of the load resistor, and a second end of the second resistor is grounded, wherein the second resistor and the load resistor form a voltage divider module.

5. The optical image acquisition and control system for a complex light scene flying device according to claim 4, characterized in that: The light collection module further includes a first capacitor, one end of which is electrically connected to the first end of the second resistor, and the other end of the first capacitor is grounded.

6. The optical image acquisition and control system for a complex light scene flying device according to claim 2, characterized in that: The light sensing chip also includes a first communication terminal; The optical detection circuit further includes a wireless transmission module, which is electrically connected to the first communication end and is used for wirelessly transmitting or receiving light parameters.

7. The optical image acquisition and control system for a complex light scene flying device according to claim 6, characterized in that: The wireless transmission module includes a first inductor, a second capacitor and a third capacitor, one end of the first inductor is electrically connected to the first communication end, the other end of the first inductor is used to electrically connect to the antenna, and one end of the first inductor and the other end of the first inductor are grounded via the second capacitor and the third capacitor respectively.

8. The optical image acquisition and control system for a complex light scene flying device according to claim 2, characterized in that: The main control chip includes a third control terminal; The driving circuit comprises: A voltage control circuit, comprising an input terminal, a second communication terminal, a second output terminal and a third output terminal, wherein the input terminal is electrically connected to a power supply, the second communication terminal is electrically connected to the second control terminal, and the voltage control circuit is used to boost the power supply voltage, generate a first target voltage to output to the second output terminal, and output a second target voltage to the third output terminal; A push-pull circuit, comprising a fourth control end, a second connection end, a third connection end and a fourth connection end, wherein the fourth control end is electrically connected to the third control end, the second connection end is electrically connected to the second output end, the third connection end is electrically connected to the third output end, and the fourth connection end is electrically connected to the first output end; The push-pull circuit is configured to operate based on the second target voltage, and to control the frequency and duty cycle of the first target voltage output according to different PWM signals of the fourth control terminal, so as to adjust the transmittance of the electrochromic filter.

9. The optical image acquisition and control system for a complex light scene flying device according to claim 8, characterized in that: The main control chip also includes a third receiving end; The push-pull circuit further includes a feedback module, a detection end of the feedback module is electrically connected to the first output end, and a feedback end of the feedback module is electrically connected to the third receiving end.

10. An optical image acquisition control method for a flying device in a complex light scene, characterized in that: The optical image acquisition control method of the complex light scene flying device includes: Collect scene light parameters; generating a transmittance adjustment signal according to scene light parameters; Analyzing the transmittance adjustment signal to obtain a voltage adjustment parameter and a pulse width adjustment parameter; Obtaining a filter adjustment parameter according to the voltage adjustment parameter and the pulse width adjustment parameter; The light transmittance of the electrochromic filter is adjusted according to the filter adjustment parameter.

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