High-low brightness constant current time-sharing line scanning control system and control method based on machine vision

Abstract

The invention discloses a high-low brightness constant current time-sharing line scanning control system and control method based on machine vision, and the system comprises: 1, a high-low brightness constant current time-sharing line scanning control system based on machine vision, which comprises a main control module; a brightness high-speed switching module; the constant-current light source driving module comprises a first voltage following circuit, an FPGA (Field Programmable Gate Array) control branch and an LED light source driving branch; a large and small power switching module; a heat dissipation module; a temperature detection module; the control method of the high-low brightness constant-current time-sharing linear scanning control system based on machine vision comprises the following steps: S1, inserting an LED light source; s2, the first brightness adjusting signal is sent to a brightness high-speed switching module, and the second brightness adjusting signal is sent to a constant-current light source driving module; s3, the high and low power switching module is switched into high power or low power; s4, switching the heat dissipation module into high-power heat dissipation or low-power heat dissipation; and S5, the temperature detection module carries out multi-point position temperature measurement on the machine vision environment.

Description

Technical Field

[0001] The present invention relates to the technical field of machine vision systems, and in particular to a control method for a high-low brightness constant current time-sharing line scanning control system based on machine vision. Background Art

[0002] In the field of automated machine vision, linear light sources are widely used, such as defect detection in the lithium battery industry, etc. Therefore, it is particularly important for linear light sources to have a stable working environment and a good service life.

[0003] However, current automated machine vision systems have the following drawbacks: 1. The constant voltage system is used, and the linear light source works unstably; 2. The high and low brightness switching of the linear light source is not fast enough, which does not meet the requirements of products that require high-speed detection; 3. The power of its machine vision system is difficult to adjust. Under a certain power, the heat dissipation module is not environmentally friendly and also has certain noise pollution. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned defects in the prior art and provide a high-low brightness constant current time-sharing line scanning control system and control method based on machine vision, which is used to solve the problems of unstable operation of the linear light source using a constant voltage system in the prior art machine vision system, insufficient fast switching of high and low brightness, and poor power adjustment of the machine vision system.

[0005] To achieve the above object, the present invention is implemented through the following two aspects: In a first aspect, the present invention provides a high-low brightness constant current time-sharing line scanning control system based on machine vision, comprising: Main control module; A high-speed brightness switching module, the high-speed brightness switching module is used to receive a first brightness adjustment signal sent by the main control module at high speed; A constant current light source driving module, the constant current light source driving module comprises a first voltage follower circuit, an FPGA control branch and an LED light source driving branch, the voltage input signal end of the first voltage follower circuit is used to receive a second brightness adjustment signal sent by a brightness high-speed switching module at high speed, the FPGA control branch comprises a fifth MOSFET tube, the LED light source driving branch comprises a second MOSFET tube, and the voltage output signal end of the first voltage follower circuit is respectively connected to the drain of the fifth MOSFET tube of the FPGA control branch and the gate of the second MOSFET tube of the LED light source driving branch; A high-power and low-power switching module, which is used to receive a high-power signal or a low-power signal sent by the main control module and adjust the machine vision environment power to high power or low power; The heat dissipation module, the main control module drives and outputs the heat dissipation module according to the high-power signal or the low-power signal; The temperature detection module is used to detect the temperature of multiple points in the machine vision environment and feed back the temperature of multiple points in the machine vision environment to the main control module.

[0006] Preferably, the main control module is a core board chip.

[0007] Preferably, the high-speed brightness switching module is a digital-to-analog converter, which is used to receive the first brightness adjustment signal sent by the main control module at high speed as a digital signal, and the second brightness adjustment signal broadcast to the voltage input signal end of the first voltage follower circuit of the constant current light source driving module is an analog signal.

[0008] Preferably, the FPGA control branch of the constant current light source driving module further includes an FPGA signal input terminal connected to the gate of a fifth MOSFET tube, and the source of the fifth MOSFET tube is grounded.

[0009] Preferably, the LED light source driving branch of the constant current light source driving module also includes a current limiting resistor connected to the drain of the second MOSFET tube and an LED light source port connected in parallel to the current limiting resistor and used to install the LED light source, and the source of the second MOSFET tube is grounded.

[0010] Preferably, the first voltage follower circuit includes an operational amplifier, the voltage input signal terminal of the first voltage follower circuit is the non-inverting input terminal of the operational amplifier, the voltage output signal terminal of the first voltage follower circuit is the output terminal of the operational amplifier, the negative feedback signal terminal of the first voltage follower circuit is the inverting input terminal of the operational amplifier, and the negative feedback signal terminal of the first voltage follower circuit is connected to the source of the second MOSFET tube of the LED light source driving branch.

[0011] Preferably, an optimized capacitor is connected between the voltage output signal terminal and the negative feedback signal terminal of the first voltage follower circuit.

[0012] Preferably, a constant current identification circuit module is also included, which includes an LM317 voltage regulator module and a second voltage follower circuit, the output end of the LM317 voltage regulator module is used to collect the LED light source voltage, the voltage signal input end of the second voltage follower circuit is connected to the output end of the LM317 voltage regulator module, and the voltage signal output end of the second voltage follower circuit is connected to the main control module.

[0013] Preferably, the high-power and low-power switching module includes a first MOSFET tube and a relay, the gate of the first MOSFET tube is used to receive a high-power signal or a low-power signal sent by the main control module, the drain of the first MOSFET tube is connected to the control end of the relay, the source of the first MOSFET tube is grounded, the switch end of the relay includes a high-power end and a low-power end which are controlled and switched by the control end respectively, the high-power end or the low-power end is connected to a step-down conversion circuit for powering the machine vision system, the heat dissipation module includes several fan modules, and the temperature detection module includes multiple temperature control sensors.

[0014] In a second aspect, the present invention provides a control method for a high-low brightness constant current time-sharing line scanning control system based on machine vision, which is implemented by a high-low brightness constant current time-sharing line scanning control system based on machine vision as described in the first aspect, and the steps include: S1: Insert the LED light source into the constant current light source driver module; S2: The main control module sends the first brightness adjustment signal to the brightness high-speed switching module, and the brightness high-speed switching module then sends the second brightness adjustment signal to the voltage signal input end of the first voltage follower circuit of the constant current light source driving module, and connects the voltage signal output end of the first voltage follower circuit of the constant current light source driving module to the gate of the second MOSFET tube of the LED light source driving branch, so that the LED light source current of the LED light source driving branch is constant, and the drain of the fifth MOSFET tube of the FPGA control branch is connected to the voltage signal output end of the first voltage follower circuit of the constant current light source driving module, so as to control the switch of the LED light source driving branch; S3: The main control module is used to control the high and low power switching module to switch the machine vision environment power to high power or low power; S4: The main control module switches the heat dissipation module to high-power heat dissipation or low-power heat dissipation according to the high-power signal or the low-power signal; S5: The temperature detection module measures the temperature at multiple points in the machine vision environment, feeds back the temperature measurement signals at multiple points to the main control module, and further adjusts the heat dissipation power of the heat dissipation module.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention realizes that the current of the LED light source is constant when the brightness is certain through the constant current light source driving module. The constant current of the LED light source can ensure its working stability and improve the service life of the LED light source.

[0016] 2. The present invention realizes constant current time-sharing line scanning of LED light source through constant current light source driving module, and can also quickly switch the LED light source between high and low brightness, so as to adapt to products that require high-speed detection, and the LED light source can quickly adjust the brightness, so as to more flexibly adapt to machine vision environments that require different brightness detection.

[0017] 3. The present invention uses a high and low power switching module. In a machine vision environment with a lower brightness requirement, the heat dissipation module can be switched to operate at low power. In this case, not much heat dissipation is required, and the heat dissipation of the system can be reduced, thereby achieving energy saving and reducing environmental noise problems. In a machine vision environment with a higher brightness requirement, the heat dissipation module can meet the heat dissipation problem in the high power mode. At the same time, the temperature detection module will be able to monitor the temperature in real time and adjust the ambient temperature inside the system in real time, and can further accurately control the power of the heat dissipation module, thereby achieving the optimal working environment of the machine vision environment.

[0018] 4. In summary, the present invention provides a high-low brightness constant current time-sharing line scanning control system and control method based on machine vision. First, a constant current light source driving module is designed to better ensure the brightness stability and service life of the LED light source, so as to better detect the product; second, a brightness high-speed switching module is designed. When the detected product runs at high speed, the machine vision environment has good high-speed switching, so as to more efficiently meet the product detection; third, a large and small power switching module and a corresponding heat dissipation module are designed. When the machine vision environment is used for the detection of low-power products, the main control module will switch to the low-power mode. In the low-power mode, the fan speed will match it to achieve efficient use, environmental protection and quietness. When switched to the high-power mode, the fan speed will increase, thereby meeting the heat dissipation problem in the high-power mode. At the same time, the temperature detection module adjusts the ambient temperature of the machine vision environment in real time, thereby achieving the optimal working environment of the machine vision environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the module principle of a high-low brightness constant current time-sharing line scanning control system based on machine vision provided by an embodiment of the present invention; Figure 2 is a circuit diagram of a high-low brightness constant current time-sharing line scanning control system based on machine vision provided by an embodiment of the present invention; (wherein, Figure 2 The circuit diagram includes Figure 3 Master template 1, Figure 4 Brightness high-speed switching module 2, Figure 5 Constant current light source driver module 3, Figure 6 Constant current identification circuit module 30, Figure 7 Large and small power switching module 4, Figure 8 Buck conversion circuit 40, Fig. 9 The heat dissipation module 5 and Fig.10 Temperature detection module 6) Figure 3 : is a circuit diagram of a main control module provided by an embodiment of the present invention; ( Figure 3 The main control module 1 includes an MCP4922 SDI signal, and the MCP4922 SDI signal is a brightness high-speed switching module 2 for high-speed receiving a first brightness adjustment signal sent by the main control module 1) Figure 4 is a circuit diagram of a brightness high-speed switching module provided by an embodiment of the present invention; Figure 5 is a circuit diagram of a constant current light source driving module provided by an embodiment of the present invention; Figure 6 is a circuit diagram of a constant current identification circuit module provided by an embodiment of the present invention; Figure 7 is a circuit diagram of a high-low power switching module provided by an embodiment of the present invention; Figure 8 is a circuit diagram of a buck conversion circuit provided by an embodiment of the present invention; Fig. 9 is a circuit diagram of a heat dissipation module provided by an embodiment of the present invention; Fig.10 is a circuit diagram of a temperature detection module provided by an embodiment of the present invention.

[0021] Included in the figure are: 1. Main control module; 2. High-speed brightness switching module; 3. Constant current light source driving module; 30. Constant current identification circuit module; 301. LM317 voltage regulator module; 302. Second voltage follower circuit; 31. First voltage follower circuit; 315. Optimized capacitor; 32. FPGA control branch; 33. LED light source driving branch; 335. Current limiting resistor; 4. High and low power switching module; 40. Buck conversion circuit; 5. Heat dissipation module; 50. Fan module; 6. Temperature detection module; 60. Temperature control sensor. DETAILED DESCRIPTION

[0022] The technical scheme in this embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in this embodiment of the present invention. Obviously, the described embodiment is one embodiment of the present invention, not all embodiments of the present invention. Based on this embodiment of the present invention, all other embodiments of the present invention obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1 to Figure 1 1. The embodiment of the present invention provides a high-low brightness constant current time-sharing line scanning control system and control method based on machine vision, which includes the following two aspects: In a first aspect, an embodiment of the present invention provides a high-low brightness constant current time-sharing line scanning control system based on machine vision, comprising: Main control module 1; The high-speed brightness switching module 2 is used to receive the first brightness adjustment signal (such as the attached Figure 3 and 4 MCP4922 SDI signal as shown); The constant current light source driving module 3 includes a first voltage follower circuit 31, an FPGA control branch 32 and an LED light source driving branch 33. The voltage input signal terminal of the first voltage follower circuit 31 (such as the attached Figure 5 The DAC1 signal shown in the figure is used to receive the second brightness adjustment signal (as shown in the figure) sent by the brightness high-speed switching module 2 at high speed. Figure 5 The FPGA control branch 32 includes a fifth MOSFET tube (as shown in the attached Figure 5 The LED light source driving branch 33 includes a second MOSFET tube (as shown in the figure). Figure 5 The Q2 symbol shown in FIG. 1 is a voltage output signal terminal of the first voltage follower circuit 31 (as shown in FIG. Figure 5 The first terminal signal of the operational amplifier shown in the figure) is respectively connected to the drain of the fifth MOSFET tube of the FPGA control branch 32 and the gate of the second MOSFET tube of the LED light source driving branch 33; The high and low power switching module 4 is used to receive the high power signal or low power signal (such as the attached Figure 7 V switch signal as shown) and adjust the machine vision environment power to high power or low power; The heat dissipation module 5 and the main control module 1 are based on the high power signal or the low power signal (such as the attached Figure 7 The V switch signal shown in the figure) drives the heat dissipation module 5 to output; The temperature detection module 6 is used to detect the temperature at multiple points in the machine vision environment and feed back the temperature at multiple points in the machine vision environment to the main control module 1 .

[0024] The main control module 1 is a core board chip.

[0025] The brightness high-speed switching module 2 is a digital-to-analog converter, and the brightness high-speed switching module 2 is used to receive the first brightness adjustment signal sent by the main control module 1 at a high speed as a digital signal (such as the attached Figure 3 and 4 The second brightness adjustment signal used to be sent to the voltage input signal terminal of the first voltage follower circuit 31 of the constant current light source driving module 3 is an analog signal (such as the MCP4922 SDI signal shown in the figure). Figure 4 and 5 Specifically, the brightness high-speed switching module 2 is a MCP4922 digital-to-analog converter.

[0026] The FPGA control branch 32 of the constant current light source driving module 3 also includes an FPGA signal input terminal connected to the gate of the fifth MOSFET tube, and the source of the fifth MOSFET tube is grounded.

[0027] The LED light source driving branch 33 of the constant current light source driving module 3 also includes a current limiting resistor 335 connected to the drain of the second MOSFET tube and an LED light source port connected in parallel to the current limiting resistor 335 and used to install the LED light source. The source of the second MOSFET tube is grounded.

[0028] The first voltage follower circuit 31 includes an operational amplifier. The voltage input signal terminal of the first voltage follower circuit 31 (such as the attached Figure 5 The third terminal signal of the operational amplifier shown in the figure) is the non-inverting input terminal of the operational amplifier, and the voltage output signal terminal of the first voltage follower circuit 31 (as shown in the figure) is the non-inverting input terminal of the operational amplifier. Figure 5 The first terminal signal of the operational amplifier shown in the figure) is the output terminal of the operational amplifier, and the negative feedback signal terminal of the first voltage follower circuit 31 (as shown in the figure) is the output terminal of the operational amplifier. Figure 5 The fourth terminal signal of the operational amplifier shown in the figure is the inverting input terminal of the operational amplifier, and the negative feedback signal terminal of the first voltage follower circuit 31 is connected to the source of the second MOSFET tube of the LED light source driving branch 33.

[0029] An optimized capacitor 315 is connected between the voltage output signal terminal of the first voltage follower circuit 31 and its negative feedback signal terminal. By optimizing the capacitor 315, the brightness of the LED light source can be adjusted more smoothly.

[0030] The high-low brightness constant current time-sharing line scanning control system based on machine vision also includes a constant current identification circuit module 30, which includes an LM317 voltage regulator module 301 and a second voltage follower circuit 302. The output end of the LM317 voltage regulator module 301 is used to collect the LED light source voltage (mainly collecting the voltage of the current limiting resistor 335), the voltage signal input end of the second voltage follower circuit 302 is connected to the output end of the LM317 voltage regulator module 301, and the voltage signal output end of the second voltage follower circuit 302 is connected to the main control module 1. The main control module 1 determines and identifies how large the LED light source current constant current value needs to be output based on the LED light source voltage signal at the voltage signal output end of the second voltage follower circuit 302.

[0031] The large and small power switching module 4 includes a first MOSFET tube (such as the attached Figure 7 Q1 symbol shown) and relays (as shown in the attached Figure 7 The RELAY symbol shown in the figure), the gate of the first MOSFET tube is used to receive the high-power signal or the low-power signal sent by the main control module 1, the drain of the first MOSFET tube is connected to the control end of the relay, the source of the first MOSFET tube is grounded, the switch end of the relay includes a high-power end and a low-power end which are respectively controlled and switched by the control end, the high-power end or the low-power end is connected to a step-down conversion circuit 40 for powering the machine vision system, the heat dissipation module 5 includes a plurality of fan modules 50, and the temperature detection module 6 includes a plurality of temperature control sensors 60.

[0032] In a second aspect, a control method of a high-low brightness constant current time-sharing line scanning control system based on machine vision is implemented by a high-low brightness constant current time-sharing line scanning control system based on machine vision as in the first aspect above, and the steps include: S1: Insert the LED light source into the constant current light source driving module 3; Among them, the voltage of the current limiting resistor 335 connected in parallel with the LED light source changes, the constant current identification circuit module 30 samples the voltage value of the current limiting resistor 335 and transmits the voltage value sampling signal to the main control module 1 through the second voltage follower circuit 302, and the main control module 1 uses this to determine and identify how much constant current value of the LED light source current needs to be output (the constant current value of the LED light source current is the first brightness adjustment signal); S2: The main control module 1 sends the first brightness adjustment signal to the brightness high-speed switching module 2, and the brightness high-speed switching module 2 then sends the second brightness adjustment signal to the voltage signal input end of the first voltage follower circuit 31 of the constant current light source driving module 3, and the voltage signal output end of the first voltage follower circuit 31 of the constant current light source driving module 3 is connected to the gate of the second MOSFET tube of the LED light source driving branch 33, so that the LED light source current of the LED light source driving branch 33 is constant, and the drain of the fifth MOSFET tube of the FPGA control branch 32 is connected to the voltage signal output end of the first voltage follower circuit 31 of the constant current light source driving module 3, so that the switch of the LED light source driving branch 33 can be controlled; The second brightness adjustment signal can adjust the brightness of the LED light source; S3: The main control module 1 is used to control the high and low power switching module 4 to switch the machine vision environment power to high power or low power, so that the entire machine vision environment is switched to a high power environment or a low power environment; S4: The main control module 1 switches the heat dissipation module 5 to high-power heat dissipation or low-power heat dissipation according to the high-power signal or the low-power signal; S5: The temperature detection module 6 measures the temperature at multiple points in the machine vision environment, and feeds back the temperature measurement signals at the multiple points to the main control module 1, and further adjusts the heat dissipation power of the heat dissipation module 5.

[0033] The embodiments of the present invention provide a high-low brightness constant current time-sharing line scanning control system and control method based on machine vision, which have the advantages of: First: The constant current light source driver module 3 is designed to better ensure the brightness stability and service life of the LED light source, so as to better detect the product; Second: A high-speed brightness switching module 2 is designed. When the product being inspected runs at high speed, the machine vision environment has good high-speed switching, which can more efficiently meet the product inspection requirements; Third: a high and low power switching module 4 and a corresponding heat dissipation module 5 are designed. When the machine vision environment is used for the detection of low-power products, the main control module 1 will switch to the low-power mode. In the low-power mode, the fan speed will match it to achieve efficient use, environmental protection and silence. When switching to the high-power mode, the fan speed will increase to meet the heat dissipation problem in the high-power mode. At the same time, the temperature detection module 6 adjusts the ambient temperature of the machine vision environment in real time to achieve the optimal working environment of the machine vision environment.

[0034] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high and low brightness constant current time-sharing line scanning control system based on machine vision, characterized in that ,include: Main control module (1); A high-speed brightness switching module (2), the high-speed brightness switching module (2) being used for receiving at high speed a first brightness adjustment signal sent by the main control module (1); A constant current light source driving module (3), the constant current light source driving module (3) comprising a first voltage follower circuit (31), an FPGA control branch (32) and an LED light source driving branch (33), the voltage input signal end of the first voltage follower circuit (31) being used for high-speed receiving a second brightness adjustment signal sent by a brightness high-speed switching module (2), the FPGA control branch (32) comprising a fifth MOSFET tube, the LED light source driving branch (33) comprising a second MOSFET tube, and the voltage output signal end of the first voltage follower circuit (31) being respectively connected to the drain of the fifth MOSFET tube of the FPGA control branch (32) and the gate of the second MOSFET tube of the LED light source driving branch (33); A high-power and low-power switching module (4), the high-power and low-power switching module (4) being used to receive a high-power signal or a low-power signal sent by the main control module (1) and adjust the machine vision environment power to high power or low power; A heat dissipation module (5), wherein the main control module (1) drives and outputs the heat dissipation module (5) according to a high-power signal or a low-power signal; A temperature detection module (6), wherein the temperature detection module (6) is used to detect the temperature at multiple points in the machine vision environment and feed back the temperature at multiple points in the machine vision environment to the main control module (1).

2. According to claim 1, a high and low brightness constant current time-sharing line scanning control system based on machine vision is characterized in that , the main control module (1) is a core board chip.

3. According to the machine vision-based high and low brightness constant current time-sharing line scanning control system of claim 1, it is characterized in that The high-speed brightness switching module (2) is a digital-to-analog converter, and the high-speed brightness switching module (2) is used to receive a first brightness adjustment signal sent by the main control module (1) at a high speed, which is a digital signal, and the second brightness adjustment signal, which is used to be broadcast to the voltage input signal end of the first voltage follower circuit (31) of the constant current light source driving module (3), is an analog signal.

4. According to the machine vision-based high and low brightness constant current time-sharing line scanning control system of claim 1, it is characterized in that The FPGA control branch (32) of the constant current light source driving module (3) further comprises an FPGA signal input terminal connected to the gate of a fifth MOSFET tube, and the source of the fifth MOSFET tube is grounded.

5. According to the machine vision-based high and low brightness constant current time-sharing line scanning control system of claim 1, it is characterized in that The LED light source driving branch (33) of the constant current light source driving module (3) further comprises a current limiting resistor (335) connected to the drain of the second MOSFET tube and an LED light source port connected in parallel to the current limiting resistor (335) and used to install the LED light source, and the source of the second MOSFET tube is grounded.

6. A high-low brightness constant current time-sharing line scanning control system based on machine vision according to claim 1 or 5, characterized in that The first voltage follower circuit (31) comprises an operational amplifier, a voltage input signal end of the first voltage follower circuit (31) is a non-inverting input end of the operational amplifier, a voltage output signal end of the first voltage follower circuit (31) is an output end of the operational amplifier, a negative feedback signal end of the first voltage follower circuit (31) is an inverting input end of the operational amplifier, and the negative feedback signal end of the first voltage follower circuit (31) is connected to the source of the second MOSFET tube of the LED light source driving branch (33).

7. The high and low brightness constant current time-sharing line scanning control system based on machine vision according to claim 6 is characterized in that An optimized capacitor (315) is connected between the voltage output signal terminal and the negative feedback signal terminal of the first voltage follower circuit (31).

8. According to the machine vision-based high and low brightness constant current time-sharing line scanning control system of claim 1, it is characterized in that , further comprising a constant current identification circuit module (30), the constant current identification circuit module (30) comprising an LM317 voltage stabilizing module (301) and a second voltage follower circuit (302), the output end of the LM317 voltage stabilizing module (301) being used to collect the LED light source voltage, the voltage signal input end of the second voltage follower circuit (302) being connected to the output end of the LM317 voltage stabilizing module (301), and the voltage signal output end of the second voltage follower circuit (302) being connected to the main control module (1).

9. The high and low brightness constant current time-sharing line scanning control system based on machine vision according to claim 1 is characterized in that The high-power and low-power switching module (4) includes a first MOSFET tube and a relay, the gate of the first MOSFET tube is used to receive a high-power signal or a low-power signal sent by the main control module (1), the drain of the first MOSFET tube is connected to the control end of the relay, the source of the first MOSFET tube is grounded, the switch end of the relay includes a high-power end and a low-power end that are controlled and switched by the control end respectively, the high-power end or the low-power end is connected to a step-down conversion circuit (40) for powering the machine vision system, the heat dissipation module (5) includes a plurality of fan modules (50), and the temperature detection module (6) includes a plurality of temperature control sensors (60).

10. A control method for a high-low brightness constant current time-sharing line scanning control system based on machine vision, characterized in that: The method is implemented by a high-low brightness constant current time-sharing line scanning control system based on machine vision as claimed in any one of claims 1 to 9, wherein the steps include: S1: inserting the LED light source into the constant current light source driving module (3); S2: the main control module (1) sends a first brightness adjustment signal to the brightness high-speed switching module (2), and the brightness high-speed switching module (2) then sends a second brightness adjustment signal to the voltage signal input end of the first voltage follower circuit (31) of the constant current light source driving module (3), and the voltage signal output end of the first voltage follower circuit (31) of the constant current light source driving module (3) is connected to the gate of the second MOSFET tube of the LED light source driving branch (33), so that the LED light source current of the LED light source driving branch (33) is constant, and the drain of the fifth MOSFET tube of the FPGA control branch (32) is connected to the voltage signal output end of the first voltage follower circuit (31) of the constant current light source driving module (3), so that the switch of the LED light source driving branch (33) can be controlled; S3: The main control module (1) is used to control the high and low power switching module (4) to switch the machine vision environment power to high power or low power; S4: the main control module (1) switches the heat dissipation module (5) to high-power heat dissipation or low-power heat dissipation according to the high-power signal or the low-power signal; S5: The temperature detection module (6) measures the temperature at multiple points in the machine vision environment, feeds back the temperature measurement signals at the multiple points to the main control module (1), and further adjusts the heat dissipation power of the heat dissipation module (5).

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