Constant-current brightening type stroboflash controller
By designing a constant current brightening strobe controller, combined with DC/DC step-down circuit, MCU control circuit, light source driving circuit, FPGA control circuit, temperature acquisition circuit and communication circuit, the problems of slow response speed, insufficient output brightness and flexibility in the existing technology are solved, and the brightness and strobe of the light source are quickly responded and finely controlled in complex lighting environments, supporting multiple light sources, and extending the service life of the equipment through effective heat dissipation management.
Patent Information
- Application Number
- CN202422208318.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-10
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-09-10
AI Technical Summary
Existing strobe controllers have slow response speed, insufficient output brightness and flexibility in complex lighting application scenarios, and cannot achieve stable constant current output, resulting in unstable light source and affecting image clarity and consistency.
A constant current brightening strobe controller is designed, including DC/DC step-down circuit, MCU control circuit, light source driving circuit, FPGA control circuit, temperature acquisition circuit and communication circuit. Through these circuits, fast response, multiple light source support, fine brightness adjustment and brightening functions are achieved, and heat dissipation management is achieved through temperature acquisition and fan control.
It realizes rapid response and fine control of the brightness and strobe of the light source in complex lighting environments, supports multiple light sources, ensures the stability of the light source and image consistency, and extends the service life of the equipment through effective heat dissipation management.
Smart Images
Figure CN222981705U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a controller, in particular to a constant-current brightening type stroboscopic controller. Background Art
[0002] At present, there are few types of stroboscopic controllers on the market, which are mainly applied to simple shooting scenarios, such as capturing images of fast-moving objects in industrial inspection. Existing stroboscopic controllers usually only have ordinary brightness output or simple brightening functions, and the response speed is slow, usually about 20 microseconds, and the adapted frame rate is generally about 100Hz, which is sufficient for some simple flying shooting scenarios. However, for some complex lighting application scenarios, such as industrial inspection and machine vision applications that require precise control of brightness, stroboscopic times, and response time, existing controllers cannot meet the requirements in terms of response speed, output brightness, and flexibility. In addition, traditional stroboscopic controllers usually only support single-type light source output and lack stable constant-current output control, resulting in unstable light sources and uneven brightness during high-frequency use, thus affecting the clarity and consistency of images. At the same time, the heat dissipation design of existing devices is relatively single, usually relying only on natural heat dissipation or simple control of fans, and it is difficult to meet the high-temperature requirements during long-term operation, which easily leads to shortened device life. Summary of the Invention
[0003] In order to solve the above problems, the utility model provides a constant-current brightening type stroboscopic controller, which can be used in a complex lighting environment, has a fast response speed, supports multiple light sources, and has fine brightness adjustment and brightening functions, so as to solve the above problems in the prior art.
[0004] The utility model is realized by the following technical solutions: A constant-current brightening type stroboscopic controller, comprising:
[0005] A DC / DC buck circuit for stepping down the 48V power supply to a voltage suitable for the operation of the controller;
[0006] An MCU control circuit connected to the DC / DC buck circuit for receiving input signals and controlling the operation of the entire controller;
[0007] A light source driving circuit connected to the MCU control circuit for receiving the driving signal output by the MCU control circuit to drive the light source;
[0008] An FPGA control circuit connected to the MCU control circuit for adjusting the brightness and stroboscopic characteristics of the light source;
[0009] A temperature acquisition circuit connected to the MCU control circuit for monitoring the temperature of the controller and adjusting the cooling fan according to the temperature signal;
[0010] A communication circuit, connected to the MCU control circuit, for implementing the communication functions of RS232 and RS485 interfaces;
[0011] A trigger input circuit, connected to the MCU control circuit, for receiving an external trigger signal and controlling the stroboscopic output of the light source.
[0012] As a preferred technical solution, the light source driving circuit includes a pulse width modulation controller, which realizes constant current output and controls the stroboscopic and brightening functions of the light source by adjusting the PWM signal.
[0013] As a preferred technical solution, the FPGA control circuit is configured to adjust the light source according to the set brightness multiple, and the brightness brightening multiple is adjustable between 1 and 10 times.
[0014] As a preferred technical solution, the temperature acquisition circuit further includes a temperature control fan control module, and the fan control module adjusts the rotation speed of the fan according to the temperature information collected by the temperature acquisition circuit.
[0015] As a preferred technical solution, the communication circuit integrates RS232 interface and RS485 interface to realize serial communication between multiple devices.
[0016] As a preferred technical solution, the trigger input circuit includes external trigger and internal trigger modes, and the external trigger mode can be synchronized with the camera trigger signal to adapt to high-frequency and low-latency application scenarios.
[0017] As a preferred technical solution, the MCU control circuit is connected to the camera trigger circuit, for receiving the synchronous trigger signal from the camera and triggering the stroboscopic of the light source, so as to realize the precise synchronization between the camera and the light source.
[0018] As a preferred technical solution, the MCU control circuit is connected to the user interface circuit, and the user interface circuit includes a digital tube display and operation buttons, for setting the stroboscopic parameters and brightness adjustment parameters of the light source.
[0019] The beneficial effects of the present utility model are: the controller of the present utility model can realize precise light source brightness adjustment. Combining pulse width modulation technology and FPGA control circuit, users can select a brightening multiple of 1 to 10 times according to different application scenarios, which is suitable for complex lighting environments;
[0020] Secondly, the controller integrates a temperature acquisition circuit and a temperature-controlled fan, effectively managing the heat dissipation of the system, avoiding the problem of overheating of the light source caused by high temperature, and thus extending the service life of the light source and the system. The device also supports external and internal trigger modes. In particular, the low-latency trigger input circuit can ensure that the light source responds to the trigger signal within nanoseconds, achieving efficient synchronization with the camera and meeting the requirements of high-frequency shooting and fast light source control;
[0021] In addition, the RS232 and RS485 interfaces of the controller support remote control and serial communication with multiple devices, greatly enhancing the operability and flexibility of the system. Especially in complex environments where multiple workstations need to be controlled simultaneously, it reduces the hardware cost and space occupancy. Through the fine pulse width modulation function, the system can achieve a smoother transition of the light source brightness, improving the consistency and accuracy of the image, and is particularly suitable for high-precision shooting scenarios in the field of machine vision. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0023] Figure 1 It is the system block diagram of the present invention;
[0024] Figure 2 It is the MCU initialization and startup circuit diagram of the present invention;
[0025] Figure 3 It is the FPGA pin configuration and power distribution circuit diagram of the present invention;
[0026] Figure 4 It is the DAC current control circuit diagram of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0027] All features disclosed in this specification, or all steps in the disclosed methods or processes, except for mutually exclusive features and / or steps, can be combined in any way.
[0028] Any feature disclosed in this specification (including any additional claims, abstract, and drawings), unless specifically stated, can be replaced by other equivalent or similar-purpose alternative features. That is, unless specifically stated, each feature is only an example of a series of equivalent or similar features.
[0029] Such as Figures 1-4As shown in the figure, a constant-current brightening type stroboscopic controller of the present utility model includes a DC / DC buck circuit for stepping down the 48V power supply to a voltage suitable for the operation of the controller;
[0030] An MCU control circuit, connected to the DC / DC buck circuit, for receiving input signals and controlling the operation of the entire controller;
[0031] A light source driving circuit, connected to the MCU control circuit, for receiving the driving signal output by the MCU control circuit to drive the light source;
[0032] An FPGA control circuit, connected to the MCU control circuit, for adjusting the brightness and stroboscopic characteristics of the light source;
[0033] A temperature acquisition circuit, connected to the MCU control circuit, for monitoring the temperature of the controller and adjusting the cooling fan according to the temperature signal;
[0034] A communication circuit, connected to the MCU control circuit, for implementing the communication functions of RS232 and RS485 interfaces;
[0035] A trigger input circuit, connected to the MCU control circuit, for receiving external trigger signals and controlling the stroboscopic output of the light source.
[0036] Among them, the light source driving circuit includes a pulse width modulation controller, which realizes constant-current output and controls the stroboscopic and brightening functions of the light source by adjusting the PWM signal. The FPGA control circuit is configured to adjust the light source according to the set brightness multiple, and the brightness brightening multiple is adjustable between 1 and 10 times. The temperature acquisition circuit further includes a temperature control fan control module, and the fan control module adjusts the rotation speed of the fan according to the temperature information collected by the temperature acquisition circuit.
[0037] Among them, the communication circuit integrates RS232 interface and RS485 interface to realize serial communication between multiple devices. The trigger input circuit includes external trigger and internal trigger modes. The external trigger mode can be synchronized with the camera trigger signal to adapt to high-frequency and low-latency application scenarios. The MCU control circuit is connected to the camera trigger circuit for receiving the synchronous trigger signal from the camera and triggering the light source stroboscope, so as to realize the precise synchronization between the camera and the light source. The MCU control circuit is connected to the user interface circuit, and the user interface circuit includes a digital tube display and operation buttons for setting the stroboscopic parameters and brightness adjustment parameters of the light source.
[0038] The core working principle of this constant-current brightening type stroboscopic controller is as follows:
[0039] A stable operating voltage is provided for the system through a DC / DC buck circuit, and central control is carried out through the MCU control circuit. The FPGA control circuit is responsible for the fast response of brightness enhancement. At the same time, the stroboscopic control of the light source is achieved through the PWM signal of the light source drive circuit. This controller has a communication interface, supports RS232 and RS485 communications, and can achieve low-latency light source stroboscopy through an external trigger signal. The temperature control system realizes heat dissipation management through the temperature acquisition circuit and the fan control circuit to ensure the long-term stable operation of the device.
[0040] The power supply part uses a DC / DC buck circuit to step down the input 48V power supply to appropriate operating voltages such as 3.3V and 5V, which is the basis for the stable operation of the system. The buck circuit is responsible for supplying power to the MCU control circuit, FPGA circuit, and other modules. Components such as filter capacitors, voltage stabilizing diodes, and buck ICs in the circuit ensure the stability and reliability of voltage conversion and provide a constant operating voltage for the subsequent circuits.
[0041] The MCU control circuit is the core of the entire system, responsible for processing external signal inputs and executing corresponding control logics. The MCU is connected to multiple modules through its pins, including the trigger input circuit, light source drive circuit, temperature acquisition circuit, and communication interface, etc.
[0042] The main task of the MCU is to receive instructions from the user interface or remote communication interface and control the brightness and stroboscopic mode of the light source according to the instructions. It controls the brightness of the light source by outputting a PWM (pulse width modulation) signal, and this PWM signal is transmitted to the light source drive circuit to adjust the output current and voltage of the light source.
[0043] The MCU is also connected to the temperature acquisition circuit, can monitor the temperature of the device in real time, and automatically adjust the fan speed to optimize the heat dissipation effect to ensure that the system maintains a stable temperature during long-term operation.
[0044] The light source drive circuit is the core circuit for controlling the brightness and stroboscopy of the light source, and adjusts the brightness of the light source through the PWM signal of the MCU. The duty cycle of the PWM signal determines the brightness of the light source. A higher duty cycle means a brighter light output, while a lower duty cycle has a darker light source output.
[0045] In the circuit diagram, the DAC current control circuit is used to convert digital signals into analog current outputs to adjust the magnitude of the current controlled by PWM, so as to ensure the stable operation of the light source at different brightness levels, enable the PWM signal to accurately control the brightness change of the light source, and ensure the uniformity and accuracy of stroboscopy.
[0046] The FPGA is used in the entire controller to implement fast-response brightness adjustment and brightening functions. The FPGA has the advantage of processing high-speed signals, being able to respond to control signals from the MCU within a short time and quickly adjust the light source, supporting 1 to 10 times brightness brightening. The FPGA enables it to handle complex light source control tasks, especially in scenarios that require high-frequency flickering and dynamic brightness changes, such as high-speed shooting or complex industrial inspection occasions.
[0047] The FPGA control circuit is directly connected to the light source drive circuit to adjust the current output and brightness, thereby achieving control of complex light source brightening effects and stroboscopic modes.
[0048] The trigger input circuit is designed to receive trigger signals from external devices, such as the synchronization signal of a camera. After the trigger signal is input, it is processed by the MCU, which converts the trigger signal into a control signal for the light source drive to achieve synchronous strobing of the light source with the external device.
[0049] This controller supports two modes: external trigger and internal trigger. In the external trigger mode, when the camera sends a shutter signal, the MCU immediately responds and controls the strobing operation of the light source through a PWM signal to ensure synchronization of the light source with the camera's exposure. In the internal trigger mode, the MCU controls the light source to flash according to the preset frequency and timing.
[0050] The system is equipped with RS232 and RS485 communication interfaces, allowing remote devices to communicate with the controller. The communication interfaces are controlled by the MCU. Users can set the brightness of the light source, stroboscopic frequency, and other working parameters through remote instructions. The communication part in the circuit diagram shows the pin connection methods of these interfaces. The MCU is responsible for interpreting the communication data and converting it into corresponding control signals, which are transmitted to the light source drive circuit and the FPGA to achieve remote control of the light source.
[0051] The temperature control system monitors the temperature inside the device in real time through a temperature acquisition circuit. The data is transmitted to the MCU, and the MCU adjusts the rotation speed of the cooling fan according to the temperature data. Under high-load working conditions, as the temperature rises, the MCU will increase the fan rotation speed through a PWM control signal to accelerate heat dissipation and prevent the system from overheating. This part achieves dynamic heat dissipation management through a temperature acquisition module and a fan control circuit.
[0052] The present invention provides a stable operating voltage through a DC / DC buck circuit. The MCU control circuit serves as the control center, responsible for receiving external input signals and executing the stroboscopic control logic. The FPGA is used for the fast response of brightness enhancement. The light source drive circuit precisely adjusts the brightness and stroboscopic effect of the light source through PWM signals. The trigger input circuit ensures low-latency synchronization between the light source and external devices. The communication circuit enables remote control and multi-device management. Finally, through the temperature acquisition circuit and the fan control circuit, the system achieves intelligent heat dissipation management.
[0053] The above are only the specific implementation manners of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be thought of without creative efforts should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope defined by the claims.
Claims
1. A constant current brightening type strobe controller, characterized in that: include: DC / DC step-down circuit, used to step down the 48V power supply to a voltage suitable for the controller to work; An MCU control circuit is connected to the DC / DC step-down circuit and is used to receive input signals and control the operation of the entire controller; A light source driving circuit, connected to the MCU control circuit, and configured to receive a driving signal output by the MCU control circuit to drive the light source; An FPGA control circuit is connected to the MCU control circuit and is used to adjust the brightness and stroboscopic characteristics of the light source; A temperature acquisition circuit is connected to the MCU control circuit and is used to monitor the temperature of the controller and adjust the cooling fan according to the temperature signal; A communication circuit is connected to the MCU control circuit and is used to realize the communication functions of RS232 and RS485 interfaces; The trigger input circuit is connected to the MCU control circuit and is used to receive an external trigger signal and control the stroboscopic output of the light source.
2. The constant current brightness enhancement type strobe controller according to claim 1, characterized in that: The light source driving circuit includes a pulse width modulation controller, which realizes constant current output and controls the stroboscopic and brightening functions of the light source by adjusting the PWM signal.
3. The constant current brightness enhancement type strobe controller according to claim 1, characterized in that: The FPGA control circuit is configured to adjust the light source according to a set brightness multiple, and the brightness increase multiple is adjustable between 1 and 10 times.
4. The constant current brightness enhancement type strobe controller according to claim 1, characterized in that: The temperature acquisition circuit further includes a temperature-controlled fan control module, and the fan control module adjusts the rotation speed of the fan according to the temperature information acquired by the temperature acquisition circuit.
5. The constant current brightness enhancement type strobe controller according to claim 1, characterized in that: The communication circuit integrates an RS232 interface and an RS485 interface to realize serial communication between multiple devices.
6. The constant current brightness enhancement type strobe controller according to claim 1, characterized in that: The trigger input circuit includes external trigger and internal trigger modes. The external trigger mode can be synchronized with the camera trigger signal to adapt to high-frequency and low-latency application scenarios.
7. The constant current brightness enhancement type strobe controller according to claim 1, characterized in that: The MCU control circuit is connected to the camera trigger circuit to receive a synchronous trigger signal from the camera and trigger the light source to strobe, thereby achieving accurate synchronization between the camera and the light source.
8. The constant current brightness enhancement type strobe controller according to claim 1, characterized in that: The MCU control circuit is connected to a user interface circuit, and the user interface circuit includes a digital tube display and operation buttons for setting the stroboscopic parameters and brightness adjustment parameters of the light source.