Camera device and control method thereof

Abstract

The invention provides a camera device and a control method of the camera device, and the camera device comprises a lens assembly, a signal transmission assembly, and a holder provided with a control module. The holder is further provided with a plurality of rotating joints, and each rotating joint comprises a first rotating part and a second rotating part rotationally connected to the first rotating part. The transmission assembly comprises a plurality of wires connected between the lens assembly and the control module and a plurality of wireless optical communication modules connected between the adjacent wires, and each wireless optical communication module comprises a first photoelectric module installed on the first rotating part and a second photoelectric module installed on the second rotating part. The first photoelectric module and the second photoelectric module are coaxially arranged; the first photoelectric modules are used for converting electric signals into optical signals and outputting the optical signals to the corresponding second photoelectric modules, and the second photoelectric modules are used for converting the received optical signals into electric signals. Through the implementation of the scheme of the invention, the signal transmission rate and the signal transmission quality between the control module and the lens assembly can be effectively improved.

Description

Technical Field

[0001] This invention belongs to the field of optoelectronic transmission technology, and particularly relates to a camera device and a control method for the camera device. Background Technology

[0002] In dynamic camera devices, the electrical connection between movable parts (lens and image sensor module) and the fixed body (main control module) is crucial. In related technologies, signal transmission between movable parts and the control module generally relies on cable bundles, and these physical cables must pass through the pan-tilt joints that enable rotation or pitch movements. Traditional cable transmission methods are prone to the following drawbacks during long-term dynamic use: First, as image sensors evolve towards ultra-high resolution and high frame rates, massive amounts of data place extremely high demands on the transmission link. Copper wires passing through narrow rotating joints are susceptible to signal attenuation and electromagnetic interference, making it difficult to stably support uncompressed, high-quality raw video streams. Second, the continuous movement of the rotating joint causes repeated bending and twisting of the cables, easily leading to internal metal fatigue fracture, insulation wear, and poor connector contact, causing signal interruption or equipment failure, resulting in high maintenance costs and limited product lifespan. Summary of the Invention

[0003] The technical objective of this invention is to provide a camera device and a control method for the camera device, aiming to solve the aforementioned problems in the related art.

[0004] In a first aspect, a camera device is provided, comprising a lens assembly, a signal transmission assembly, and a pan-tilt unit with a control module. A signal transmission channel is provided between the lens assembly and the control module, and the signal transmission assembly is mounted on the signal transmission channel. The pan-tilt unit also has multiple rotating joints, each rotating joint comprising a first rotating part and a second rotating part rotatably connected to the first rotating part. The signal transmission channel includes a first mounting port located on the first rotating part and a second mounting port located on the second rotating part, the first mounting port and the second mounting port being coaxially arranged. The transmission assembly includes multiple wire segments connected between the lens assembly and the control module, and wireless optical communication modules connected between adjacent wire segments. The number of wireless optical communication modules is equal to the number of rotating joints. Each wireless optical communication module includes a first photoelectric module mounted on the first mounting port and a second photoelectric module mounted on the second mounting port. The first photoelectric module is used to convert an electrical signal into an optical signal and output it to the corresponding second photoelectric module, and the second photoelectric module is used to convert the received optical signal into an electrical signal.

[0005] Optionally, the laser direction of the first optoelectronic module satisfies the following relationship: Z·sinθ≤80nm in, ZThis indicates the distance between the first optoelectronic module and the second optoelectronic module. θ This indicates the angle between the laser direction and the rotation axis of the corresponding rotating joint.

[0006] Optional, Z The value range is 2mm to 50mm.

[0007] Optionally, the laser direction of the first optoelectronic module also satisfies the following relationship: δx≤a / 2 δy≤a / 2 in, a This indicates the side length of the equivalent square corresponding to the photosensitive area of ​​the second optoelectronic module. δx This indicates the first deviation displacement of the laser direction along the first direction. δy This indicates a second deviation displacement of the laser direction along the second direction, wherein the first direction, the second direction, and the rotation axis of the corresponding rotating joint are mutually perpendicular.

[0008] Optionally, the wire includes an image signal line for transmitting image data acquired by the lens assembly; the first optoelectronic module includes a first driving module and a first laser connected to the first driving module; the first driving module is used to generate a first driving signal for the first laser based on the image signal of the corresponding image signal line, so as to drive the first laser to emit a first light signal to the second optoelectronic module.

[0009] Optionally, the second optoelectronic module includes a first photodetector and a first transimpedance amplifier connected to the first photodetector; the first photodetector is used to acquire the first optical signal and convert the first optical signal into an initial image electrical signal; the first transimpedance amplifier is used to acquire the initial image signal and amplify the initial image signal, and then output it to the corresponding image signal line.

[0010] Optionally, the second optoelectronic module further includes a focusing lens disposed between the first laser and the first photodetector, the focusing lens having a size of 3mm to 6mm.

[0011] Optionally, the wire further includes a control signal line for transmitting control information of the control module; the second optoelectronic module includes a second driving module and a second laser connected to the second driving module; the second driving module is used to generate a second driving signal for the second laser based on the control signal of the corresponding control signal line, so as to drive the second laser to emit a second light signal to the second optoelectronic module.

[0012] Optionally, the second optoelectronic module further includes a second photodetector and a second transimpedance amplifier connected to the second photodetector. The second photodetector is used to acquire the second optical signal and convert the second optical signal into an initial control signal. The second transimpedance amplifier is used to acquire the initial control signal, amplify the initial control signal, and then output it to the corresponding control signal line.

[0013] Optionally, the gimbal includes a body, a first transmission mechanism, and a second transmission mechanism. The control component is disposed within the body. The body and the first transmission mechanism are connected via a first rotating joint. The first transmission mechanism and the second transmission mechanism are connected via a second rotating joint. The second transmission mechanism and the lens assembly are connected via a third rotating joint. The rotation axis of the first rotating joint and the rotation axis of the third rotating joint are both perpendicular to the rotation axis of the second rotating joint.

[0014] In a second aspect, a control method for a camera device is provided, applied to the camera device described in the first aspect, the method comprising: After the first photoelectric module of the camera device emits an optical signal to the second photoelectric module, the electrical signal obtained by the second photoelectric module based on the optical signal is acquired. If the quality of the electrical signal does not meet the requirements for continued transmission to the next node, the control object and the control parameters of the control object are determined based on the amplitude margin and timing margin of the electrical signal; wherein, the control object is the first optoelectronic module and / or the second optoelectronic module, the control parameters corresponding to the first optoelectronic module include the drive current, and the control parameters corresponding to the second optoelectronic module include at least one of the equalization parameter and the gain parameter; The controlled object operates based on the control parameters.

[0015] Compared with the prior art, the camera device and its control method in this invention have the following advantages: the wireless optical communication module can provide extremely high data transmission bandwidth for communication between the control module and the lens assembly, effectively reducing signal attenuation and electromagnetic interference, and realizing high-speed transmission of image and video signals; in this application, the first photoelectric module and the second photoelectric module in the wireless optical communication module are spaced apart from each other and are coaxially arranged. No matter how the first rotating part and the second rotating part rotate, the optical transmission channel between the first photoelectric module and the second photoelectric module will not change. While ensuring the stability of signal transmission, it can effectively avoid cable wear caused by the rotation of the rotating joint and improve the service life of the camera module. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the overall structure of the camera device in the first embodiment of the present invention; Figure 2 This is a schematic diagram of the transmission of the wireless optical communication module in the first embodiment of the present invention; Figure 3 This is a schematic diagram of the transmission route of the transmission component in the first embodiment of the present invention; Figure 4 This is a perspective view of a portion of the camera device structure in the first embodiment of the present invention; Figure 5 This is a basic flowchart of the control method for the camera device in the second embodiment of the present invention.

[0017] In the accompanying drawings, the reference numerals represent: 1. Gimbal; 11. Body; 12. Rotating joint; 121. First rotating part; 122. Second rotating part; 13. First transmission mechanism; 14. Second transmission mechanism; 2. Lens assembly; 3. Transmission assembly; 31. Wire; 32. Wireless optical communication module; 321. First optoelectronic module; 322. Second optoelectronic module; 4. Control module. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "circumferential," and "radial," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] Example: like Figure 1-4 As shown, the first embodiment of this application provides a camera device, which includes a lens assembly 2, a signal transmission assembly 3, and a pan-tilt unit 1 equipped with a control module 4. A signal transmission channel is provided between the lens assembly 2 and the control module 4, and the signal transmission assembly 3 is installed in the signal transmission channel. The pan-tilt unit 1 also has a plurality of rotating joints 12, each rotating joint 12 including a first rotating part 121 and a second rotating part 122 rotatably connected to the first rotating part 121. The signal transmission channel includes a first mounting port provided in the first rotating part 121 and a second mounting port provided in the second rotating part 122. The mounting ports are coaxially arranged; the transmission component 3 includes multiple wires 31 connected between the lens assembly 2 and the control module 4, and wireless optical communication modules 32 connected between adjacent wires 31. The number of wireless optical communication modules 32 is equal to the number of rotating joints 12. The wireless optical communication modules 32 include a first photoelectric module 321 installed in the first mounting port and a second photoelectric module 322 installed in the second mounting port. The first photoelectric module 321 is used to convert electrical signals into optical signals and output them to the corresponding second photoelectric module 322. The second photoelectric module 322 is used to convert the received optical signals into electrical signals.

[0022] Specifically, the wireless optical communication module 32 provides extremely high data transmission bandwidth for communication between the control module 4 and the lens assembly 2, effectively reducing signal attenuation and electromagnetic interference, and enabling lossless transmission of image and video signals at rates exceeding 10Gbps. In this embodiment, the first photoelectric module 321 and the second photoelectric module 322 in the wireless optical communication module 32 are spaced apart from each other and coaxially arranged, enabling free-space optical communication. Regardless of how the first rotating part 121 and the second rotating part 122 rotate, the optical transmission channel between the first photoelectric module 321 and the second photoelectric module 322 will not change. While ensuring the stability of signal transmission, it can effectively avoid cable wear caused by the rotation of the rotating joint 12, thus improving the service life of the camera module.

[0023] like Figure 2 As shown, in some embodiments, the laser direction of the first optoelectronic module 321 satisfies the following relationship: Z·sinθ≤80nm in, Z This indicates the distance between the first optoelectronic module 321 and the second optoelectronic module 322. θ This indicates the angle between the laser direction and the rotation axis of the corresponding rotary joint 12.

[0024] Specifically, the distance between the first optoelectronic module 321 and the second optoelectronic module 322 can be the distance between the light output area of ​​the first optoelectronic module 321 and the photosensitive area of ​​the second optoelectronic module 322. During actual operation, the first rotating part 121 and the second rotating part 122 may experience mechanical vibration and slight positional drift. This embodiment addresses this by adjusting parameters... Z and parameters θ The combined constraints enable a stable and controllable physical communication channel to be formed between the first optoelectronic module 321 and the second optoelectronic module 322, ensuring that the light receiving part of the second optoelectronic module 322 can always cover the laser spot of the first optoelectronic module 321, thus achieving stable wireless communication.

[0025] In some implementations... Z The value range can be 2mm to 50mm. In some specific embodiments, the distance between the first photoelectric module 321 and the second photoelectric module 322 is... Z It can be 5mm, 10mm, 15mm, 18mm, 25mm, 30mm, etc., without limitation. This can be achieved by adjusting the parameters. Z The strict limitations ensure that almost all optical power is concentrated on the second optoelectronic module 322, avoiding unnecessary dissipation of optical power into the surrounding space, thus achieving higher optoelectronic conversion efficiency and lower transmission error rate.

[0026] like Figure 2 As shown, in some embodiments, the laser direction of the first optoelectronic module 321 also satisfies the following relationship: δx≤a / 2 δy≤a / 2 in, a This indicates the side length of the equivalent square corresponding to the photosensitive area of ​​the second optoelectronic module 322. δx This indicates the first deviation displacement of the laser direction along the first direction. δy This indicates the second deviation displacement of the laser direction along the second direction. The first direction, the second direction, and the rotation axes of the corresponding rotation joint 12 are mutually perpendicular.

[0027] Specifically, in this embodiment, the photosensitive area can be circular or rectangular, and the side length of the equivalent square can be equal to the diameter of the circular photosensitive area or equal to the shorter side of the rectangular photosensitive area. In some specific embodiments, it is also possible to make... δx≤a / 3 and make δy≤a / 3No restrictions are imposed here. By limiting the size and direction of the laser module in this way, the fluctuation of the optical power incident on the second optoelectronic module 322 is minimized within a limited displacement range. This provides a stable and high-quality input signal for subsequent optoelectronic conversion and signal processing circuits, effectively reducing the bit error rate.

[0028] In some embodiments, the wire 31 includes an image signal line for transmitting image data acquired by the lens assembly 2; the first optoelectronic module 321 includes a first driving module and a first laser connected to the first driving module; the first driving module is used to generate a first driving signal for the first laser based on the image signal of the corresponding image signal line, so as to drive the first laser to emit a first light signal to the second optoelectronic module 322.

[0029] Specifically, the laser in this embodiment can be a multimode laser with a wavelength range of 800~1000nm; for example, an 850nm wavelength vertical-cavity surface-emitting laser (VCSEL) can be used as the laser in this embodiment. The driving module, also known as the driver module, can generate a first driving signal based on a video image signal carrying video image information, and then drive the first laser to emit laser light to the second optoelectronic module 322 through the first driving signal. In some specific embodiments, the first optoelectronic module 321 may also include a housing and a collimating lens fixed to the housing. The first driving module and the first laser are respectively fixed inside the housing, and the collimating lens is located between the emission port of the first laser and the photosensitive area of ​​the second optoelectronic module 322. This arrangement allows the laser light emitted by the first laser to accurately reach the photosensitive area of ​​the second optoelectronic module 322 after being collimated by the collimating lens.

[0030] Furthermore, in some embodiments, the second optoelectronic module 322 includes a first photodetector and a first transimpedance amplifier connected to the first photodetector; the first photodetector is used to acquire a first optical signal and convert the first optical signal into an initial image electrical signal; the first transimpedance amplifier is used to acquire the initial image signal and amplify the initial image signal, and then output it to the corresponding image signal line.

[0031] Specifically, the photodetector can be a photodiode (PD), and the transimpedance amplifier (TIA) works in conjunction with the photodetector to amplify the weak electrical signal output by the photodetector into a large voltage signal for output. In some specific implementations, a variable gain amplifier and an equalizer can be connected in series after the first transimpedance amplifier. The variable gain amplifier can be used to adjust the high-frequency components of the electrical signal output by the TIA. For example, the gain of the variable gain amplifier can be dynamically adjusted based on the amplitude margin of the electrical signal monitored by the system to stabilize the signal amplitude within the optimal range. The equalizer can be used in wireless communication to cancel signal distortion and inter-symbol interference caused by the channel, restore the integrity of the original signal, and improve transmission quality and stability. For example, the equalization parameters (such as tap coefficients) of the equalizer can be dynamically adjusted based on the timing margin of the electrical signal detected by the system and the horizontal opening of the eye diagram to compensate for high-frequency losses and eliminate inter-symbol interference.

[0032] Furthermore, in some embodiments, the second optoelectronic module 322 also includes a focusing lens disposed between the first laser and the first photodetector, the focusing lens having a size of 3mm to 6mm. This design ensures that the diverging laser emitted by the first optoelectronic module 321 can be precisely focused onto the receiving port of the first photodetector by the focusing lens when it reaches the second optoelectronic module 322. It can be understood that the aforementioned photosensitive area refers to the area where the focusing lens is located. In some specific embodiments, the size of the first photodetector can be less than 0.08mm, and the width of the focusing lens can be 2mm, 2.5mm, 3mm, 3.5mm, 4mm, etc., without limitation.

[0033] In other embodiments, the wire 31 further includes a control signal line for transmitting control information of the control module 4; the second optoelectronic module 322 includes a second driving module and a second laser connected to the second driving module; the second driving module is used to generate a second driving signal for the second laser based on the control signal of the corresponding control signal line, so as to drive the second laser to emit a second optical signal to the second optoelectronic module 322; the second optoelectronic module 322 further includes a second photodetector and a second transimpedance amplifier connected to the second photodetector, the second photodetector is used to acquire the second optical signal and convert the second optical signal into an initial control signal; the second transimpedance amplifier is used to acquire the initial control signal and amplify the initial control signal, and then output it to the corresponding control signal line.

[0034] Specifically, by configuring the first laser, the first driving module, the second laser, the second driving module, the first photodetector, the first transimpedance amplifier, the second photodetector, and the second transimpedance amplifier, the wireless optical communication module 32 can form a bidirectional transmission module (that is, a bidirectional transmission channel is formed between the first photodetector module 321 and the second photodetector module 322), supporting both unidirectional data transmission and bidirectional data transmission for sending and receiving operations. For example, in unidirectional transmission, video signals (such as MIPI, RGB, LVDS, etc.) collected by the lens assembly 2 or digital signals serialized by a serializer can be transmitted. In bidirectional transmission, in addition to transmitting the aforementioned video signals, control signals from the control module 4 can also be transmitted in reverse between the lens assembly 2 and the pan-tilt unit 1, and the type of control signal is not limited. In some specific implementations, the output / input units of the control module 4 can work simultaneously or unidirectionally. When the control system of the camera device detects that there is no data transmission, it can send a shutdown command to the corresponding laser, transimpedance amplifier, variable gain amplifier, equalizer, and other devices to shut down the corresponding laser, transimpedance amplifier, variable gain amplifier, and equalizer, so that the module enters a low-power mode and achieves energy saving.

[0035] like Figure 3 and 4 As shown, in some embodiments, the gimbal 1 includes a body 11, a first transmission mechanism 13 and a second transmission mechanism 14, and a control component is disposed inside the body 11. The body 11 and the first transmission mechanism 13 are connected by a first rotating joint 12, the first transmission mechanism 13 and the second transmission mechanism 14 are connected by a second rotating joint 12, and the second transmission mechanism 14 and the lens assembly 2 are connected by a third rotating joint 12. The rotation axis of the first rotating joint 12 and the rotation axis of the third rotating joint 12 are both perpendicular to the rotation axis of the second rotating joint 12.

[0036] Specifically, the signal transmission channel also includes cable-passing cavities respectively disposed in the first transmission mechanism 13 and the second transmission mechanism 14. Wireless optical communication modules 32 are disposed in the first rotating joint 12, the second rotating joint 12, and the third rotating joint 12. A wire 31 is disposed in the cable-passing cavity of the first transmission mechanism 13, which is used to connect the wireless optical communication module 32 corresponding to the first rotating joint 12 with the wireless optical communication module 32 corresponding to the second rotating joint 12. A wire 31 is also disposed in the cable-passing cavity of the second transmission mechanism 14, which is used to connect the wireless optical communication module 32 corresponding to the second rotating joint 12 with the wireless optical communication module 32 corresponding to the third rotating joint 12. In this embodiment, drive motors can also be disposed at the first rotating joint 12, the second rotating joint 12, and the third rotating joint 12, respectively. Each drive motor can drive the corresponding rotating part to rotate, thereby allowing for omnidirectional adjustment of the relative position of the lens assembly 2 and the body 11 as needed. By implementing the solution of this application, while ensuring that the position and orientation of the lens assembly 2 can be flexibly adjusted, the signal transmission rate and signal transmission quality between the control module 4 and the lens assembly 2 can be effectively improved. There is no need for redundant wiring, and copper wire wear can be avoided, effectively improving the service life of the camera device.

[0037] A second embodiment of this application provides a control method for a camera device, applied to the camera device of the first aspect, such as... Figure 5 As shown, the control method includes the following steps: S1. After the first photoelectric module of the camera device emits an optical signal to the second photoelectric module, the electrical signal obtained by the second photoelectric module based on the optical signal conversion is acquired. S2. If the quality of the electrical signal does not meet the requirements for continuing transmission to the next node, the control object and the control parameters of the control object are determined based on the amplitude margin and timing margin of the electrical signal; wherein, the control object is the first optoelectronic module and / or the second optoelectronic module, the control parameters corresponding to the first optoelectronic module include the drive current, and the control parameters corresponding to the second optoelectronic module include at least one of the equalization parameter and the gain parameter.

[0038] S3. The controlled object operates based on the control parameters; Specifically, the above method and steps can be applied to situations where the first optoelectronic module acts as the optical signal transmitter and the second optoelectronic module acts as the optical signal receiver. In this embodiment, the first and second optoelectronic modules can be equipped with specific monitoring pins. The control system of the camera device can acquire the electrical signals of the corresponding transmission nodes through the monitoring pins, thereby evaluating the working status of the wireless optical communication module. By judging the signal transmission quality of the corresponding wireless optical communication module through the electrical signals, when it is found that the current working parameters cannot meet the requirements of high-speed and high-quality transmission, the working parameters of the first and / or second optoelectronic modules in the wireless optical communication module are adjusted in a timely manner to compensate for changes in channel characteristics caused by mechanical micro-motion or device aging in real time, ensuring the integrity of the transmitted signal. Through the implementation of the above method, a closed-loop feedback mechanism that can achieve both extreme performance and maintain extreme energy efficiency is established, ensuring that the wireless optical communication module achieves high-quality signal transmission in dynamic and harsh PTZ environments.

[0039] In some specific implementations, the step of determining the control object and its control parameters based on the amplitude and timing margins of the electrical signal if the quality of the electrical signal does not meet the requirements for continued transmission to the next node includes: determining the eye opening of the corresponding electrical signal based on the amplitude and timing margins; wherein the amplitude margin is related to the height of the eye diagram, and the timing margin is related to the width of the eye diagram; determining whether the width of the eye diagram is less than a preset threshold parameter; if the opening is greater than or equal to the preset threshold parameter, then determining that the quality of the electrical signal meets the requirements for continued transmission to the next node; if the opening is less than the preset threshold parameter, then determining that the quality of the electrical signal does not meet the requirements for continued transmission to the next node; and determining the control object and its control parameters based on the opening and the threshold parameter.

[0040] Specifically, the calculation module can be a clock data recovery circuit or a dedicated diagnostic module connected to the monitoring pins of the second optoelectronic module. This clock data recovery circuit or dedicated diagnostic module can calculate the signal amplitude margin and timing margin in real time. Furthermore, the amplitude margin and timing margin can be used to determine whether the quality of the electrical signal output by the second optoelectronic module meets the requirements for continued transmission to the next node. In this embodiment, the next node can refer to the next wireless optical communication module or lens assembly. In some specific implementations, when the eye diagram opening is less than a preset threshold parameter, i.e., when eye diagram closure occurs, it is determined that the signal has experienced high-frequency attenuation. The second optoelectronic module can then be identified as the control target, and the compensation strength of the equalizer in the second optoelectronic module can be increased.

[0041] In some specific implementations, the step of determining the control object and its control parameters based on the amplitude and timing margins of the electrical signal if the quality of the electrical signal does not meet the requirements for continued transmission to the next node further includes: predicting the corresponding signal bit error rate based on the amplitude and timing margins of the electrical signal; when the difference between the signal bit error rate and the theoretical bit error rate is greater than or equal to a preset difference, determining the control object and its control parameters based on the predicted signal bit error rate; wherein the control object can be a second optoelectronic module, and the control parameters of the control object can be equalization parameters.

[0042] In some specific implementations, after determining the amplitude margin of the electrical signal, the method further includes: when determining whether the amplitude margin belongs to a preset margin range, if the amplitude margin does not belong to the preset margin range, then based on the amplitude margin of the electrical signal, determining the control object and the control parameters of the control object; wherein, the control object is a first photoelectric module and / or a second photoelectric module, the control parameters corresponding to the first photoelectric module include the drive current, and the control parameters corresponding to the second photoelectric module include at least one of the equalization parameter and the gain parameter.

[0043] Specifically, if the amplitude margin is less than the lower limit of the preset margin range, it indicates that the signal amplitude is too low. In this case, the first and second optoelectronic modules can be identified as the control targets. The gain parameter of the variable gain amplifier in the second optoelectronic module can be increased, and the driving current of the first laser in the first optoelectronic module can be adjusted proportionally to increase the corresponding emitted optical power. If the amplitude margin is greater than the upper limit of the preset margin range, it indicates that signal overshoot or distortion may have occurred. In this case, either the first or second optoelectronic module can be identified as the control target, and the gain parameter of the second optoelectronic module or the driving current of the first laser can be appropriately reduced.

[0044] It is understood that in some specific implementations, the above processing method can also be applied to bidirectional transmission camera devices. That is, when the second optoelectronic module acts as the optical signal transmitter and the first optoelectronic module acts as the optical signal receiver, the control method of the above camera device can also be used to dynamically regulate the working state of the first optoelectronic module and the second optoelectronic module (that is, to obtain the electrical signal obtained by the first optoelectronic module based on the optical signal conversion, and to determine whether the transmission quality of the control signal from the second optoelectronic module to the first optoelectronic module meets the relevant requirements based on the electrical signal; if it does not meet the requirements, the control parameters for the operation of the first optoelectronic module and / or the second optoelectronic module are adjusted). No restrictions are imposed here.

[0045] The third embodiment of this application provides a control system for a camera device. This control system can be used to implement the control method of the second embodiment, and mainly includes: a memory, a processor, and a computer program stored in the memory and executable on the processor. The memory and the processor are connected via communication. When the processor executes the computer program, it implements the control method described in the second embodiment. The number of processors can be one or more.

[0046] The memory can be high-speed random access memory (RAM) or non-volatile memory, such as disk storage. Memory is used to store executable program code, and the processor is coupled to the memory.

[0047] Furthermore, embodiments of this application also provide a computer-readable storage medium, which may be disposed in the aforementioned control system, and may be the memory in the foregoing embodiments.

[0048] The computer-readable storage medium stores a computer program that, when executed by a processor, implements the control method described in the foregoing embodiments. Furthermore, the computer-readable storage medium can also be a USB flash drive, a portable hard drive, a read-only memory (ROM), RAM, a magnetic disk, or an optical disk, or any other medium capable of storing program code.

[0049] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or modules may be electrical, mechanical, or other forms.

[0050] The modules described as separate components may or may not be physically separate. Similarly, the components shown as modules may or may not be physical modules; they may be located in one place or distributed across multiple network modules. Some or all of the modules can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0051] Furthermore, the functional modules in the various embodiments of this application can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module. The integrated modules described above can be implemented in hardware or as software functional modules.

[0052] If the integrated module is implemented as a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a readable storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned readable storage medium includes various media capable of storing program code, such as USB flash drives, external hard drives, ROM, RAM, magnetic disks, or optical disks.

[0053] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0054] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0055] The above are merely embodiments of the present invention. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the protection scope of the present invention.

Claims

1. A camera device, characterized in that, The device includes a lens assembly, a signal transmission assembly, and a gimbal with a control module. A signal transmission channel is provided between the lens assembly and the control module, and the signal transmission assembly is mounted on the signal transmission channel. The gimbal also has multiple rotating joints, each rotating joint including a first rotating part and a second rotating part rotatably connected to the first rotating part. The signal transmission channel includes a first mounting port located on the first rotating part and a second mounting port located on the second rotating part, and the first and second mounting ports are coaxially arranged. The transmission assembly includes multiple wires connecting the lens assembly and the control module, and wireless optical communication modules connecting adjacent wires. The number of wireless optical communication modules is equal to the number of rotating joints. Each wireless optical communication module includes a first photoelectric module mounted on the first mounting port and a second photoelectric module mounted on the second mounting port. The first optoelectronic module is used to convert electrical signals into optical signals and output them to the corresponding second optoelectronic module, and the second optoelectronic module is used to convert the received optical signals into electrical signals.

2. The camera device according to claim 1, characterized in that, The laser direction of the first optoelectronic module satisfies the following relationship: Z·sinθ≤80nm in, Z This indicates the distance between the first optoelectronic module and the second optoelectronic module. θ This indicates the angle between the laser direction and the rotation axis of the corresponding rotating joint.

3. The camera device according to claim 2, characterized in that, Z The value range is 2mm to 50mm.

4. The camera device according to claim 1, characterized in that, The laser direction of the first optoelectronic module also satisfies the following relationship: δx≤a / 2 δy≤a / 2 in, a This indicates the side length of the equivalent square corresponding to the photosensitive area of ​​the second optoelectronic module. δx This indicates the first deviation displacement of the laser direction along the first direction. δy This indicates a second deviation displacement of the laser direction along the second direction, wherein the first direction, the second direction, and the rotation axis of the corresponding rotating joint are mutually perpendicular.

5. The camera device according to claim 1, characterized in that, The wire includes an image signal line for transmitting image data acquired by the lens assembly; the first optoelectronic module includes a first driving module and a first laser connected to the first driving module; The first driving module is used to generate a first driving signal for the first laser based on the image signal of the corresponding image signal line, so as to drive the first laser to emit a first light signal to the second optoelectronic module.

6. The camera device according to claim 5, characterized in that, The second optoelectronic module includes a first photodetector and a first transimpedance amplifier connected to the first photodetector; the first photodetector is used to acquire the first optical signal and convert the first optical signal into an initial image electrical signal; the first transimpedance amplifier is used to acquire the initial image signal and amplify the initial image signal, and then output it to the corresponding image signal line.

7. The camera device according to claim 6, characterized in that, The second optoelectronic module also includes a focusing lens disposed between the first laser and the first photodetector, the focusing lens having a size of 3mm to 6mm.

8. The camera device according to claim 6, characterized in that, The wire also includes a control signal line for transmitting control information of the control module; the second optoelectronic module includes a second driving module and a second laser connected to the second driving module; The second driving module is used to generate a second driving signal for the second laser based on the control signal of the corresponding control signal line, so as to drive the second laser to emit a second optical signal to the second optoelectronic module; the second optoelectronic module further includes a second photodetector and a second transimpedance amplifier connected to the second photodetector, the second photodetector is used to acquire the second optical signal and convert the second optical signal into an initial control signal; the second transimpedance amplifier is used to acquire the initial control signal, amplify the initial control signal, and then output it to the corresponding control signal line.

9. The camera device according to claim 1, characterized in that, The gimbal includes a body, a first transmission mechanism, and a second transmission mechanism. The control component is disposed within the body. The body and the first transmission mechanism are connected via a first rotating joint. The first transmission mechanism and the second transmission mechanism are connected via a second rotating joint. The second transmission mechanism and the lens assembly are connected via a third rotating joint. The rotation axis of the first rotating joint and the rotation axis of the third rotating joint are both perpendicular to the rotation axis of the second rotating joint.

10. A control method for a camera device, applied to the camera device as described in any one of claims 1 to 9, characterized in that, The method includes: After the first photoelectric module of the camera device emits an optical signal to the second photoelectric module, the electrical signal obtained by the second photoelectric module based on the optical signal is acquired. If the quality of the electrical signal does not meet the requirements for continued transmission to the next node, the control object and the control parameters of the control object are determined based on the amplitude margin and timing margin of the electrical signal; wherein, the control object is the first optoelectronic module and / or the second optoelectronic module, the control parameters corresponding to the first optoelectronic module include the drive current, and the control parameters corresponding to the second optoelectronic module include at least one of the equalization parameter and the gain parameter; The controlled object operates based on the control parameters.

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