Camera control circuit

Abstract

The utility model relates to a camera control circuit which comprises a first voltage transformation circuit, a second voltage transformation circuit, a main control circuit and a motor driving circuit. Wherein the first voltage transformation circuit is used for being connected with an external power supply so as to take electricity from the external power supply and output first working voltage, and the first working voltage is provided for the motor driving circuit; the second voltage transformation circuit is connected with the first voltage circuit and used for taking electricity from the first voltage circuit and outputting a second working voltage, and the second working voltage is provided for the main control circuit; the main control circuit is connected with the motor driving circuit, the motor driving circuit is at least used for controlling the camera to switch the shooting position, and the problems that in the prior art, a traditional camera control circuit is high in power consumption, low in response speed, insufficient in control precision and the like are solved.

Description

Technical Field

[0001] This utility model relates to the field of camera control technology, and in particular to a camera control circuit. Background Technology

[0002] In the field of modern electronics, the design of camera control circuits is crucial for improving camera performance and user experience. With the rapid development of security, surveillance, and smart devices, higher demands are being placed on camera image quality, focusing speed, and stability. Traditional camera control circuits often suffer from high power consumption, slow response speed, and insufficient control precision, which limit the camera's ability to operate in complex environments. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a camera control circuit that addresses the shortcomings of the prior art, and solves the problems of high power consumption, slow response speed and insufficient control accuracy that often exist in traditional camera control circuits.

[0004] This utility model embodiment provides a camera control circuit, which includes a first transformer circuit, a second transformer circuit, a main control circuit, and a motor drive circuit. The first transformer circuit is connected to an external power source to draw power from the external power source and output a first operating voltage, which is provided to the motor drive circuit. The second transformer circuit is connected to the first transformer circuit and draws power from the first transformer circuit to output a second operating voltage, which is provided to the main control circuit. The main control circuit is connected to the motor drive circuit, which is at least used to control the camera to switch its camera position.

[0005] In some embodiments, the motor drive circuit is connected to an infrared switching circuit, which includes a switching motor and a filter. The switching motor is connected to the main control circuit through the motor drive circuit, and the filter is mounted on the output shaft of the switching motor.

[0006] In some embodiments, the motor drive circuit is connected to a cleaning circuit, which includes a cleaning motor and a cleaning brush. The cleaning motor is connected to the main control circuit via the motor drive circuit, and the cleaning brush is mounted on the output shaft of the cleaning motor.

[0007] In some embodiments, the motor drive circuit includes a motor drive chip.

[0008] In some embodiments, the motor drive chip includes at least a first motor drive chip and a second motor drive chip, wherein the first motor drive chip is used to connect to a camera and the second motor drive chip is used to connect to a cleaning circuit.

[0009] In some embodiments, both the first transformer circuit and the second transformer circuit are DC-DC transformer circuits.

[0010] In some embodiments, a communication circuit is also included, connected to the main control circuit, for communicating with external control devices via wired or wireless communication.

[0011] In some embodiments, the main control circuit and the motor drive circuit are connected via an I2C bus.

[0012] In some embodiments, the main control circuit is connected to the motor drive circuit via the SMB2_SCK pin and the SMB2_SDA pin.

[0013] In some embodiments, the motor driver chip is a multi-channel motor driver chip, which is connected to at least three motors.

[0014] Compared to related technologies, the camera control circuit provided in this embodiment includes a first transformer circuit, a second transformer circuit, a main control circuit, and a motor drive circuit. The first transformer circuit is connected to an external power source to draw power from the external power source and output a first operating voltage, which is provided to the motor drive circuit. The second transformer circuit is connected to the first transformer circuit to draw power from the first transformer circuit and output a second operating voltage, which is provided to the main control circuit. The main control circuit is connected to the motor drive circuit, which at least controls the camera to switch its camera position. This solves the problems of high power consumption, slow response speed, and insufficient control precision often found in traditional camera control circuits in the prior art.

[0015] Details of one or more embodiments of the present invention are set forth in the following drawings and description, so that other features, objects and advantages of the present invention will be more readily understood. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0017] Figure 1 This is an overall circuit structure diagram of an embodiment of the present utility model.

[0018] Figure 2 This is a structural diagram of the main control circuit of an embodiment of the present invention.

[0019] Figure 3 This is a structural diagram of the motor drive circuit according to an embodiment of the present invention.

[0020] Figure 4 This is a connection structure diagram between the motor drive circuit and the motor according to an embodiment of the present invention.

[0021] Figure 5 This is a connection structure diagram of the infrared switching circuit and the motor drive circuit in an embodiment of this utility model. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described and explained below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments provided by this utility model without inventive effort are within the scope of protection of this utility model. Furthermore, it can be understood that although the efforts made in such a development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this utility model, some design, manufacturing, or production modifications based on the technical content disclosed in this utility model are merely conventional technical means and should not be construed as insufficient disclosure of the present utility model.

[0023] In this utility model, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this utility model. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this utility model may be combined with other embodiments without conflict.

[0024] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "a," "an," "an," "the," and similar words used in this utility model do not indicate quantity limitation and may indicate singular or plural. The terms "comprising," "including," "having," and any variations thereof used in this utility model are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units not listed, or may include other steps or units inherent to these processes, methods, products, or devices. The terms "connected," "linked," "coupled," and similar words used in this utility model are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "A plurality" used in this utility model means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The terms "first," "second," and "third" involved in this utility model are only used to distinguish similar objects and do not represent a specific ordering of objects.

[0025] like Figure 1-5 As shown, an embodiment of this utility model provides a camera control circuit, comprising:

[0026] First transformer circuit: This circuit connects to an external power source, drawing power from it and outputting a first operating voltage. This first operating voltage provides the necessary power to the motor drive circuit, ensuring the motor can operate normally. The first transformer circuit employs efficient DC-DC conversion technology, enabling it to stably output the required voltage under different input voltage conditions, ensuring the system's reliability and stability. Specifically, the first transformer circuit uses a voltage drop chip, such as the AH8317 chip, to reduce the 12V voltage output from the power adapter to 5V to supply the motor drive circuit.

[0027] The second transformer circuit is connected to the first transformer circuit and is responsible for drawing power from the first transformer circuit and outputting a second operating voltage. This second operating voltage mainly supplies power to the main control circuit, ensuring that the main control circuit receives a stable power supply during operation and avoiding control failures caused by voltage fluctuations. The second transformer circuit is a voltage drop chip, such as the AMS1117 chip, which reduces the 5V voltage output from the power adapter to a low voltage such as 3.3V to supply the main control circuit.

[0028] Main control circuit: This circuit connects to the motor drive circuit and is responsible for controlling the switching and movement of the camera. The main control circuit uses a high-performance microcontroller, enabling rapid response to external commands and precise control of the camera's position. The main control circuit can also be programmed to implement various functions, such as automatic tracking and fixed-point shooting, improving the camera's intelligence level. The main control circuit uses the main control chip U1. When using multiple PTZ cameras, the number of motor drive chips U18 can be increased accordingly. The slave device address can be set by editing the internal registers. When the I2C resources of the main control chip U1 (master device) are insufficient, one I2C group can be used to connect multiple slave devices (motor drive chips U18); control commands are sent to the corresponding motor drive chip U18 via addressing to control the rotation of the corresponding camera motor or cleaning motor.

[0029] In this embodiment, the motor drive circuit is connected to an infrared switching circuit, which includes a switching motor and a filter. The switching motor is connected to the main control circuit via the motor drive circuit, and the filter is mounted on the output shaft of the switching motor. This design allows the camera to quickly switch between different filters according to different shooting needs, thereby achieving diverse shooting effects and meeting different user requirements. The infrared switching circuit is an IRCUT circuit, which, as mentioned above, mainly consists of a switching motor and a filter.

[0030] Based on the above embodiment, a cleaning circuit is connected to the motor drive circuit. This cleaning circuit includes a cleaning motor and a cleaning brush. The cleaning motor is connected to the main control circuit via the motor drive circuit, and the cleaning brush is mounted on the output shaft of the cleaning motor. The purpose of this design is to keep the camera lens clean and prevent dust or dirt from affecting image quality. The cleaning circuit works by issuing a command when the camera detects dirt on the lens surface, activating the cleaning motor to drive the cleaning brush for cleaning. This operation can be timed or performed as needed. In this way, the camera can maintain good image quality during long-term use, reducing maintenance costs and improving the user experience.

[0031] Based on the above embodiments, the motor drive circuit includes a motor drive chip U1. This motor drive chip includes at least a first motor drive chip and a second motor drive chip. The first motor drive chip is used to connect to the camera, and the second motor drive chip is used to connect to the cleaning circuit. The selection of the motor drive chip is crucial to the performance of the entire camera control circuit. The first motor drive chip is responsible for controlling the movement of the camera, enabling high-precision positioning and rapid response. This chip supports multiple control modes, such as PWM control and direction control, adapting to different application scenarios. The second motor drive chip is specifically used to control the cleaning circuit, precisely controlling the speed and direction of the cleaning motor according to the instructions of the main control circuit. This separate design effectively reduces system complexity and improves system stability and reliability. Furthermore, the motor drive chip also has overcurrent protection and overheat protection functions to ensure system safety under extreme operating conditions. A reasonable heat dissipation design ensures the stability of the chip during long-term operation, extending the system's lifespan. The motor drive chip is a multi-channel motor drive chip, such as the MS32008 chip or CP3206 chip, which can control the operation of multiple motors. The external input clock MOTO_FCLK of the multi-channel motor drive chip is a reserved interface. If the multi-channel motor driver chip does not have an internal clock circuit, an external clock is required. This clock is used for the main logic and counters inside the multi-channel motor driver chip.

[0032] Based on any embodiment, both the first and second transformer circuits are DC-DC transformer circuits to provide a stable power supply. The DC-DC transformer circuit design effectively reduces power consumption, improves power conversion efficiency, and ensures stable operation of the system under different load conditions. The first transformer circuit employs efficient switching power supply technology, enabling it to output a stable first operating voltage even under input voltage fluctuations. This circuit design considers electromagnetic interference (EMI) and power supply noise to ensure the purity of the output voltage and avoid impacting the camera. The second transformer circuit also uses DC-DC transformer technology, enabling it to quickly adjust the output voltage when the main control circuit load changes, ensuring the main control circuit always operates in its optimal state. This design not only improves system reliability but also extends the lifespan of the equipment. Furthermore, the transformer circuit design also considers size and cost optimization, using miniaturized components to reduce the space occupied by the circuit board and lower overall manufacturing costs. This makes the camera control circuit more competitive in practical applications.

[0033] Based on any embodiment, a communication circuit is also included, connected to the main control circuit, for communicating with external control devices via wired or wireless communication. The communication circuit design enables the camera to exchange data with external devices in real time, enhancing the system's intelligence and flexibility. This communication circuit supports multiple communication protocols, such as UART, SPI, and I2C, allowing selection of appropriate communication methods based on different application scenarios. Through the wireless module, the camera can achieve remote control and data transmission, allowing users to monitor the camera's status in real time via mobile phone or computer. For wired communication, the camera can connect to other devices through a standard interface, ensuring the stability and security of data transmission. The communication circuit design also considers anti-interference capabilities, ensuring good communication quality even in complex environments. Furthermore, the communication circuit features data encryption to ensure information security during data transmission and prevent illegal theft or tampering. This design significantly enhances the camera's application capabilities in the security field.

[0034] In any embodiment, the main control circuit and the motor drive circuit are connected via an I2C bus to achieve efficient data transmission. The I2C bus is a widely used serial communication protocol for short-range communication, characterized by its simplicity and flexibility, making it suitable for communication between multiple devices. Through the I2C bus, the main control circuit can quickly send control commands to the motor drive circuit, achieving real-time control of the camera. This bus supports multi-master and multi-slave configurations, allowing for flexible expansion of system functions and adaptation to future upgrade needs. In terms of data transmission, the I2C bus has a high transmission rate, meeting the data transmission requirements of the camera in high-dynamic scenarios. The I2C bus allows reading and writing to the motor chip's registers, enabling precise control of the motor's rotation speed, step count, and direction. Furthermore, the I2C bus design incorporates anti-interference capabilities, ensuring stable operation even in complex environments. By using the I2C bus, the system's wiring complexity is significantly reduced, minimizing circuit board space and improving system integration. This design not only improves system reliability but also reduces production costs.

[0035] Building upon the above embodiments, the main control circuit connects to the motor drive circuit via the SMB2_SCK and SMB2_SDA pins to achieve high-speed data communication. The SMB2 protocol is an I2C-based extension protocol with higher transmission rates and stronger anti-interference capabilities, making it suitable for applications with high data transmission requirements. Through the connection of the SMB2_SCK and SMB2_SDA pins, the main control circuit can send control commands at a higher frequency, ensuring that the camera can respond to user operations in real time, even in fast-moving scenarios. Furthermore, the SMB2 protocol supports multiple data transmission modes, allowing the selection of the optimal transmission method based on actual needs. Regarding data transmission security, the SMB2 protocol also supports data verification and encryption functions to ensure the integrity and security of information during data transmission. This design significantly enhances the camera's application capabilities in security and monitoring fields. By adopting the SMB2 protocol, the overall system performance is significantly improved, meeting the stringent data transmission requirements of high-performance cameras and providing users with a better experience.

[0036] The working principle of this utility model embodiment: The camera control circuit provided by this utility model effectively reduces power consumption and improves response speed and control accuracy by integrating a first transformer circuit, a second transformer circuit, a main control circuit, and a motor drive circuit, thereby improving the overall performance of the camera. Furthermore, by integrating an infrared switching circuit and a cleaning circuit, the functionality of the camera is further expanded, enhancing its application capability in complex environments. The use of a DC-DC transformer circuit ensures the stability of the power supply. The connection method using the I2C bus and SMB2 pins simplifies circuit design, reduces costs, and improves system stability and reliability. The use of a multi-channel motor drive chip enables precise control of multiple motors, further improving the camera's performance.

[0037] Those skilled in the art should understand that the technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments have been described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A camera control circuit, characterized in that, It includes a first transformer circuit, a second transformer circuit, a main control circuit, and a motor drive circuit; among which, The first transformer circuit is used to connect to an external power source to draw power from the external power source and output a first operating voltage, which is provided to the motor drive circuit. The second transformer circuit is connected to the first voltage circuit and is used to draw power from the first voltage circuit and output a second working voltage, which is provided to the main control circuit. The main control circuit is connected to the motor drive circuit, and the motor drive circuit is used at least to control the camera to switch the camera position.

2. The camera control circuit according to claim 1, characterized in that, The motor drive circuit is connected to an infrared switching circuit, which includes a switching motor and a filter. The switching motor is connected to the main control circuit through the motor drive circuit, and the filter is mounted on the output shaft of the switching motor.

3. The camera control circuit according to claim 1, characterized in that, The motor drive circuit is connected to a cleaning circuit, which includes a cleaning motor and a cleaning brush. The cleaning motor is connected to the main control circuit through the motor drive circuit, and the cleaning brush is mounted on the output shaft of the cleaning motor.

4. A camera control circuit according to claim 3, characterized in that, The motor drive circuit includes a motor drive chip.

5. A camera control circuit according to claim 4, characterized in that, The motor drive chip includes at least a first motor drive chip and a second motor drive chip, wherein the first motor drive chip is used to connect to the camera and the second motor drive chip is used to connect to the cleaning circuit.

6. A camera control circuit according to claim 1, characterized in that, Both the first transformer circuit and the second transformer circuit are DC-DC transformer circuits.

7. A camera control circuit according to claim 1, characterized in that, It also includes a communication circuit, which is connected to the main control circuit and is used to communicate with external control devices via wired or wireless communication.

8. A camera control circuit according to claim 1, characterized in that, The main control circuit and the motor drive circuit are connected via an I2C bus.

9. A camera control circuit according to claim 7, characterized in that, The main control circuit is connected to the motor drive circuit through the SMB2_SCK pin and the SMB2_SDA pin.

10. A camera control circuit according to claim 4, characterized in that, The motor drive chip is a multi-channel motor drive chip, and the multi-channel motor drive chip is connected to at least three motors.

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