Multi-channel constant current controller of light source

Abstract

The invention provides a multi-channel constant-current controller of a light source. The multi-channel constant-current controller comprises a driving board, cooling fins, a cooling fan, a power source, a shell and a display board. The driving plate, the cooling fins, the cooling fan and the power supply are all arranged in the shell; a constant-current circuit module is integrated on the surface of the driving board, the driving board is arranged at the bottom of the shell, the shell is provided with a copper column higher than the driving board, and the power supply is opposite to the driving board through the copper column; the cooling fins are connected with the driving board, and the cooling fan is arranged between the driving board and the power supply; the display panel is arranged on one side of the shell and is connected with the driving plate; the display board is provided with a plurality of light source output interfaces and a plurality of light source output aviation interfaces, and the light source output interfaces and the light source output aviation interfaces are connected with the driving board through the constant current circuit module. The display panel is provided with a plurality of light source output interfaces and a plurality of light source output aviation interfaces to be compatible with different light source devices, various scenes are flexibly adapted, the installation process is greatly simplified, and the operation convenience and the system expansibility are improved.

Description

Technical Field

[0001] This application relates to the field of machine vision inspection, specifically to a multi-channel constant current controller for a light source. Background Technology

[0002] In the existing technology, different controllers need to be adapted according to the voltage of the light source, and the corresponding controller needs to be selected according to the voltage required by the light source. Light sources with different voltages need to be matched with different or specific controllers.

[0003] This controller is used in the field of machine vision inspection. In scenarios where multiple workstations or the same workstation require multiple types of light sources, such as scenarios requiring light sources with different voltages, a controller is needed to control the operation of various light sources.

[0004] However, there are still drawbacks in use: a single controller cannot be used to directly adapt to multiple voltage types of light sources; and it is difficult to install multiple controllers when space is limited. Summary of the Invention

[0005] In view of the aforementioned problems, this application is proposed to provide a multi-channel constant current controller for a light source that overcomes or at least partially solves the aforementioned problems, comprising: A multi-channel constant current controller for a light source includes a driver board, a heat sink, a cooling fan, a power supply, a housing, and a display board; The drive board, heat sink, cooling fan, and power supply are all housed within the housing. A constant current circuit module is integrated on the surface of the drive board. The drive board is located at the bottom of the housing, and the housing has copper pillars higher than the drive board. The power supply is positioned opposite the drive board via these copper pillars. The heat sink is connected to the drive board, and the cooling fan is located between the drive board and the power supply. The display board is located on one side of the housing and is connected to the drive board. The display panel is provided with several light source output interfaces and several light source output aviation interfaces. The several light source output interfaces and several light source output aviation interfaces are connected to the driver board through the constant current circuit module.

[0006] Preferably, the constant current circuit module includes a control chip submodule U1, an input terminal P2, and an output terminal P1; one end of the control chip submodule U1 is connected to the input terminal P2, and the other end of the control chip submodule U1 is connected to the output terminal P1. The control chip submodule U1 includes input pins and output pins. The input pins are connected to the input terminal P2, and the output pins are connected to the output terminal P1. Each input pin and the output pin includes at least two pins. Different input pins are connected to the input terminal P2 to output from different output pins, thereby adjusting the output constant current by adjusting different input currents.

[0007] Preferably, the housing has a first heat dissipation duct opening on the side near the cooling fan, and a second heat dissipation duct opening opposite to the first heat dissipation duct opening on the other side of the housing; When the cooling fan is started, the airflow enters through the second cooling duct opening, flows through the drive board and the power supply, and then exits through the first cooling duct opening.

[0008] Preferably, the number of the plurality of light source output interfaces ranges from 1 to 8, and the number of the plurality of light source output aviation interfaces ranges from 1 to 2.

[0009] Preferably, the display panel is further provided with a network port socket and a serial port socket, both of which are connected to the driver board; the network port socket is used to maintain network communication between the controller and the industrial computer, and the serial port socket is used to maintain serial communication between the controller and the industrial computer.

[0010] Preferably, the display panel is further provided with a power input socket, which is connected to the power source.

[0011] Preferably, the display panel is further provided with an external signal trigger socket, which is connected to the driver board; the external signal trigger socket is used to receive external trigger signals to the controller.

[0012] Preferably, the display panel is further provided with a function setting button, which is connected to the driver board; the function setting button is used to set the parameters of the controller.

[0013] Preferably, the display panel is further provided with a digital tube, which is connected to the driver board; the digital tube is used to display the value of the setting parameters.

[0014] Preferably, the copper pillars comprise at least four pillars.

[0015] This application has the following advantages: In the embodiments of this application, addressing the shortcomings of existing technologies that cannot directly adapt to multiple voltage types of light sources using a single controller, this application provides a solution that integrates a wide-voltage-adaptive constant current circuit module on a driver board and combines it with a display board to provide several light source output interfaces and aviation interfaces. Specifically, it includes a driver board, a heat sink, a cooling fan, a power supply, a housing, and a display board; the driver board, the heat sink, the cooling fan, and the power supply are all disposed within the housing; the constant current circuit module is integrated on the surface of the driver board, the driver board is disposed at the bottom of the housing, the housing has copper pillars higher than the driver board, and the power supply is disposed opposite to the driver board through the copper pillars; the heat sink is connected to the driver board, and the cooling fan is disposed between the driver board and the power supply; the display board is disposed on one side of the housing and is connected to the driver board; the display board has several light source output interfaces and several light source output aviation interfaces, and the several light source output interfaces and several light source output aviation interfaces are connected to the driver board through the constant current circuit module. By integrating a constant current circuit module onto the driver board surface, and providing the display board with several light source output interfaces and aviation interfaces, which are connected to the driver board via the constant current circuit module, the drawback of not being able to directly adapt to multiple voltage types of light sources with a single controller is overcome. This achieves the effect of a single controller directly adapting to multiple voltage light sources and replacing multiple controllers. By integrating multiple components into a compact housing, the drawback of difficulty in installing multiple controllers when equipment space is limited is solved, thus saving equipment installation space. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this application, the drawings used in the description of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is an exploded view of the structure of a multi-channel constant current controller for a light source provided in one embodiment of this application; Figure 2 This is a schematic diagram of the structure of a multi-channel constant current controller for a light source provided in one embodiment of this application; Figure 3 This is a schematic diagram of the structure of a constant current circuit module provided in an embodiment of this application; 100. Driver board; 200. Heat sink; 300. Cooling fan; 400. Power supply; 500. Housing; 510. First cooling duct opening; 520. Second cooling duct opening; 600. Display board; 610. Light source output interface; 620. Light source output aviation interface; 630. Network port socket; 640. Serial port socket; 650. Power input socket; 660. External signal trigger socket; 670. Function setting button; 680. Digital tube; 700. Copper pillar. Detailed Implementation

[0018] To make the objectives, features, and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0019] The inventors discovered through analysis of existing technologies that: a single controller cannot be used to directly adapt to light sources with multiple voltage types such as 5V, 12V, and 24V; multiple controllers with different voltages are required for separate control; and it is difficult to install multiple controllers when equipment space is limited.

[0020] Reference Figure 1-2 This diagram illustrates the structure of a multi-channel constant current controller for a light source according to an embodiment of this application: it includes a driver board 100, a heat sink 200, a cooling fan 300, a power supply 400, a housing 500, and a display panel 600; the driver board 100, the heat sink 200, the cooling fan 300, and the power supply 400 are all disposed within the housing 500; a constant current circuit module is integrated on the surface of the driver board 100, the driver board 100 is disposed at the bottom of the housing 500, and the housing 500 has copper pillars 700 higher than the driver board 100; the power supply 400... The copper pillar 700 is positioned opposite to the drive board 100; the heat sink 200 is connected to the drive board 100; the cooling fan 300 is positioned between the drive board 100 and the power supply 400; the display board 600 is positioned on one side of the housing 500 and is connected to the drive board 100; the display board 600 is provided with a plurality of light source output interfaces 610 and a plurality of light source output aviation interfaces 620, and the plurality of light source output interfaces 610 and the plurality of light source output aviation interfaces 620 are connected to the drive board 100 through the constant current circuit module.

[0021] In the embodiments of this application, addressing the shortcomings of existing technologies that cannot directly adapt to multiple voltage types of light sources using a single controller, this application provides a solution by integrating a wide-voltage-adaptive constant current circuit module into a driver board 100 and combining it with a display board 600 to provide several light source output interfaces 610 and aviation interfaces. Specifically, it includes a driver board 100, a heat sink 200, a cooling fan 300, a power supply 400, a housing 500, and a display board 600; the driver board 100, the heat sink 200, the cooling fan 300, and the power supply 400 are all disposed within the housing 500; the constant current circuit module is integrated on the surface of the driver board 100, and the driver board 100 is disposed at the bottom of the housing 500. The housing 500 has copper pillars 700 higher than the drive board 100, and the power supply 400 is positioned opposite the drive board 100 via the copper pillars 700. A heat sink 200 is connected to the drive board 100, and a cooling fan 300 is positioned between the drive board 100 and the power supply 400. A display board 600 is located on one side of the housing 500 and connected to the drive board 100. The display board 600 has several light source output interfaces 610 and several light source output aviation interfaces 620, which are connected to the drive board 100 via a constant current circuit module. By integrating a constant current circuit module on the surface of the drive board 100 and providing several light source output interfaces 610 and aviation interfaces on the display board 600, which are connected to the drive board 100 via a constant current circuit module, the drawback of not being able to directly adapt to multiple voltage types of light sources with a single controller is solved, achieving the effect of a single controller directly adapting to multiple voltage light sources and replacing multiple controllers. By integrating multiple components into a compact housing 500 with a single controller, the drawback of difficulty in installing multiple controllers when equipment space is limited is solved, thus achieving the effect of saving equipment installation space.

[0022] The following will further describe a multi-channel constant current controller for a light source in this exemplary embodiment.

[0023] It should be noted that the display board 600, as a hub for human-computer interaction and signal relay, requires its interface design to balance convenience and reliability. The light source output interface 610 is a standardized universal interface for easy and quick wiring; the light source output aviation interface 620 features anti-misinsertion and vibration resistance, suitable for industrial or outdoor scenarios. The connection principle is as follows: after receiving the external light source load signal, the interface transmits the current demand to the constant current circuit module via flexible cabling or PCB traces. The module then distributes the current to the corresponding drive channel, achieving a closed loop of input, control, and output. This reduces errors in multi-channel current consistency and solves the problem of uneven brightness caused by load differences in traditional resistor current limiting solutions.

[0024] As an example, the light source output interface 610 can be a Phoenix terminal, a fiber optic interface, or a wireless interface.

[0025] In one specific implementation, the light source output interface 610 uses a fiber optic interface. A fiber optic transceiver (including a photoelectric conversion module) is integrated into the display panel 600 to convert electrical signals into optical signals, which are then transmitted to the constant current circuit module via fiber optics. Alternatively, the optical signal output from the constant current module can be coupled to an external light source via the fiber optic interface. The fiber optic interface transmits data through optical signals, utilizing the total internal reflection effect to conduct light pulses in the fiber core. This provides advantages such as resistance to electromagnetic interference, long transmission distance, high bandwidth, and low signal attenuation.

[0026] Reference Figure 3 The diagram shows a schematic of the structure of a constant current circuit module provided in an embodiment of this application: In one embodiment of this application, the constant current circuit module includes a control chip submodule U1, an input terminal P2, and an output terminal P1; one end of the control chip submodule U1 is connected to the input terminal P2, and the other end of the control chip submodule U1 is connected to the output terminal P1; The control chip submodule U1 includes input pins and output pins. The input pins are connected to the input terminal P2, and the output pins are connected to the output terminal P1. Each input pin and the output pin includes at least two pins. Different input pins are connected to the input terminal P2 to output from different output pins, thereby adjusting the output constant current by adjusting different input currents.

[0027] It should be noted that the flexible switching of multi-channel constant current output is achieved through a multi-input and multi-output pin architecture. The control chip submodule U1 integrates multiple independent input and output pins. Input terminal P2 serves as a common access terminal. Different input pins are connected via a switching circuit, allowing the same input power supply 400 to power different output pins in a time-division and channel-division manner. After internal constant current control by the control chip submodule U1, a stable current is output. The control chip submodule U1 uses a multi-channel constant current driver chip, with its input pin connected to input terminal P2.

[0028] The control chip U1 is an LM3409. Pin 1 receives the PWM signal from input terminal P2 through a 10KΩ resistor R1. This PWM signal is processed internally by U1 and used to regulate the output current. Pins 3 and 10 are both connected to the VIN power supply 400, which is connected to pin 5 of input terminal P2 to provide the operating voltage for the chip. Pin 3 (EN) also has an enable function. Pin 9 (VCC) is grounded through a 1uF capacitor C1 to stabilize the chip power supply 400 voltage. For constant current control, pin 6 (PGATE) drives the gate of Q1 (FR9024N). Q1, inductor L1, and freewheeling diode D1 (SS36 / SS56LBT) form a buck topology. Inductor L1 is used for energy storage, and diode D1 provides a freewheeling circuit when Q1 is turned off. Pin 7 (CSN) detects the inductor current through resistor R2 (resistance value to be determined) to form a current feedback signal. Pin 8 (CSP) works with CSN to form a current sampling network to achieve constant current control. In addition, pin 4 (COFF) forms a compensation network with R3 (resistance value to be determined) and 470pF capacitor C5 to optimize loop stability. The OUT+ and OUT- pins of output terminal P1 are connected to the negative terminals of inductor L1 and diode D1 respectively, forming an output port. Its VIN pin is connected to the input terminal VIN. The remaining pins of P1 (such as the ground pin) can be configured according to actual needs. Pins 1 to 4 of input terminal P2 can be switched to connect to different input pins of U1 (such as PWM input pins). By selecting different pin combinations, different input current scenarios can be adapted. Combined with the constant current control mechanism inside U1, the function of adjusting different input currents to a stable constant current output is ultimately achieved.

[0029] In one embodiment of this application, the housing 500 is provided with a first heat dissipation air duct opening 510 on the side near the cooling fan 300, and a second heat dissipation air duct opening 520 opposite to the first heat dissipation air duct opening 510 is provided on the other side of the housing 500. When the cooling fan 300 is started, the airflow enters through the second cooling duct opening 520, flows through the drive board 100 and the power supply 400, and then exits through the first cooling duct opening 510.

[0030] It should be noted that a forced convection cooling airflow is constructed by using the double-sided openings and the cooling fan 300. The second cooling airflow opening 520 introduces low-temperature airflow, and the fan drives the airflow to flow through the drive board 100 and the power supply 400 in sequence. After absorbing heat, the airflow is discharged from the first cooling airflow opening 510, forming a closed loop of air intake, heat absorption, and heat exhaust. This allows the temperature of the core components of the drive board 100 to be controlled, thus extending its service life.

[0031] As an example, the fan type can be either an axial fan or a centrifugal fan.

[0032] In one specific implementation, an axial fan is selected, and the airflow path is parallel or intersecting with the heat source (drive board 100, power supply 400) to maximize heat exchange efficiency. The axial fan has a large air volume and low air pressure, which is more suitable for the linear heat dissipation path of the drive board 100 and the power supply 400.

[0033] In one embodiment of this application, the number of the plurality of light source output interfaces 610 ranges from 1 to 8, and the number of the plurality of light source output aviation interfaces 620 ranges from 1 to 2.

[0034] It should be noted that the number of interfaces is limited to balance multi-channel scalability and cost control. 1 to 8 light source output interfaces cover the needs of low to medium power multi-channel applications, avoiding interface redundancy and waste; 1 to 2 aviation interfaces meet the redundancy backup or simple expansion requirements for critical scenarios.

[0035] In one embodiment of this application, the display panel 600 is further provided with a network port socket 630 and a serial port socket 640, both of which are connected to the driver board 100; the network port socket 630 is used to maintain network communication between the controller and the industrial computer, and the serial port socket 640 is used to maintain serial communication between the controller and the industrial computer.

[0036] It should be noted that a combination of high-speed network and reliable serial communication is achieved through dual communication interfaces. The Ethernet socket 630 enables high-speed data transmission, suitable for large data volumes; the serial socket 640, based on a serial protocol, enables long-distance, interference-resistant communication, suitable for simple command transmission. The dual communication interfaces of the Ethernet socket 630 and the serial socket 640 support high-speed network and long-distance serial communication, are compatible with both new and old devices, and reduce communication error rates.

[0037] As an example, the network port type can be 100 Mbps, 1 Gbps, or fiber optic.

[0038] In one embodiment of this application, the display panel 600 is further provided with a power input socket 650, which is connected to the power supply 400.

[0039] It should be noted that an external power supply 400 is input via a dedicated socket. The power input socket 650 connects to a 220V AC mains power supply or a 24V / 48V DC power supply 400. The power supply 400 module converts this into the low-voltage DC power required by the driver board 100, powering the entire controller. The dedicated power input socket 650 achieves physical isolation and electrical compatibility between the external power supply 400 and the controller's internal circuitry. This supports wide-range voltage input to adapt to global power grids, while the unified conversion via the power supply 400 module ensures stable power supply to all components.

[0040] As an example, the power input socket 650 can be a round hole socket or a waterproof terminal block.

[0041] In one specific implementation, the power input socket 650 adopts a round hole socket, which integrates reverse connection protection and overvoltage protection circuits.

[0042] In one embodiment of this application, the display panel 600 is further provided with an external signal trigger seat 660, which is connected to the driver board 100; the external signal trigger seat 660 is used to receive external trigger signals to the controller.

[0043] It should be noted that external event synchronization control is achieved through the external signal trigger 660. The external signal trigger 660 receives pulse sequences or differential signals, which are transmitted to the driver board 100 through the isolation circuit to trigger preset actions and prevent external interference from damaging the internal circuit.

[0044] As an example, the external signal trigger socket 660 can be of the type of Phoenix terminal or fiber optic interface.

[0045] In one embodiment of this application, the display panel 600 is further provided with a function setting button 670, which is connected to the driver board 100; the function setting button 670 is used to set the parameters of the controller.

[0046] It should be noted that the human-machine interaction parameter settings are achieved through the function setting button 670. When the function setting button 670 is pressed, the driver board 100 scans the pin level changes, recognizes the button command, and realizes the local setting of parameters such as current threshold, channel enable, and dimming curve.

[0047] As an example, the button type can be a tactile button, a rotary encoder, a touch button, or a membrane button.

[0048] In one specific implementation, tactile switches are used as buttons, arranged along the edge of the display panel 600. Basic parameter configuration can be completed through matrix scanning detection without the need for an external computer, making it suitable for on-site debugging.

[0049] In one embodiment of this application, the display panel 600 is further provided with a digital tube 680, which is connected to the driver board 100; the digital tube 680 is used to display the value of the setting parameter.

[0050] It should be noted that parameter visualization is achieved through the 680 digital tube, which consists of multiple light-emitting diodes. The driver board 100 directly controls the segment selection and digit selection signals through a shift register, displaying parameters such as current, voltage, and channel number in digital form. The 680 digital tube enables local parameter configuration and real-time display, allowing debugging to be completed without an external computer.

[0051] As an example, the type of digital tube 680 can be LED digital tube 680, OLED screen, or TFT color screen.

[0052] In one specific implementation, the digital tube 680 is selected from LED digital tube 680, and the current is controlled by a current-limiting resistor to avoid overheating caused by prolonged lighting.

[0053] In one embodiment of this application, the copper pillar 700 includes at least four pillars.

[0054] It should be noted that at least four copper pillars 700 are set to ensure the stability of the relative setting of the power supply 400 and the drive board 100. The four copper pillars 700 are symmetrically distributed in a rectangular or square shape, with one pillar at each of the four corners, forming a stable support frame to prevent the power supply 400 and the drive board 100 from tilting or shifting due to uneven force. The high thermal conductivity of the copper pillars 700 can also help transfer the heat of the power supply 400 to the housing 500 for heat dissipation.

[0055] As an example, the material of the copper pillar 700 can be either brass or copper.

[0056] In one specific implementation, the copper pillars 700 are made of brass and are fixed to the housing 500 by threads or welding. The four copper pillars 700 are arranged symmetrically to ensure the relative position of the power supply 400 and the drive board 100 is stable and to avoid physical interference.

[0057] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0058] The above provides a detailed description of a multi-channel constant current controller for a light source provided in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A multi-channel constant current controller for a light source, characterized in that, Includes driver board, heat sink, cooling fan, power supply, housing, and display board; The drive board, heat sink, cooling fan, and power supply are all housed within the housing. A constant current circuit module is integrated on the surface of the drive board. The drive board is located at the bottom of the housing, and the housing has copper pillars higher than the drive board. The power supply is positioned opposite the drive board via these copper pillars. The heat sink is connected to the drive board, and the cooling fan is located between the drive board and the power supply. The display board is located on one side of the housing and is connected to the drive board. The display panel is provided with several light source output interfaces and several light source output aviation interfaces. The several light source output interfaces and several light source output aviation interfaces are connected to the driver board through the constant current circuit module.

2. The controller according to claim 1, characterized in that, The constant current circuit module includes a control chip submodule U1, an input terminal P2, and an output terminal P1; one end of the control chip submodule U1 is connected to the input terminal P2, and the other end of the control chip submodule U1 is connected to the output terminal P1. The control chip submodule U1 includes input pins and output pins. The input pins are connected to the input terminal P2, and the output pins are connected to the output terminal P1. Each input pin and the output pin includes at least two pins. Different input pins are connected to the input terminal P2 to output from different output pins, thereby adjusting the output constant current by adjusting different input currents.

3. The controller according to claim 1, characterized in that, The housing has a first heat dissipation duct opening on the side near the cooling fan, and a second heat dissipation duct opening opposite to the first heat dissipation duct opening on the other side of the housing. When the cooling fan is started, the airflow enters through the second cooling duct opening, flows through the drive board and the power supply, and then exits through the first cooling duct opening.

4. The controller according to claim 1, characterized in that, The number of the aforementioned light source output interfaces ranges from 1 to 8, and the number of the aforementioned light source output aviation interfaces ranges from 1 to 2.

5. The controller according to claim 1, characterized in that, The display panel is also provided with a network port socket and a serial port socket, both of which are connected to the driver board; the network port socket is used to maintain network communication between the controller and the industrial computer, and the serial port socket is used to maintain serial communication between the controller and the industrial computer.

6. The controller according to claim 1, characterized in that, The display panel is also provided with a power input socket, which is connected to the power source.

7. The controller according to claim 1, characterized in that, The display panel is also provided with an external signal trigger socket, which is connected to the driver board; the external signal trigger socket is used to receive external trigger signals to the controller.

8. The controller according to claim 1, characterized in that, The display panel is also provided with function setting buttons, which are connected to the driver board; the function setting buttons are used to set the parameters of the controller.

9. The controller according to claim 1, characterized in that, The display panel is also equipped with a digital tube, which is connected to the driver board; the digital tube is used to display the value of the setting parameters.

10. The controller according to claim 1, characterized in that, The copper pillars consist of at least four.

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