A welding practice board automatic detection system and method

Abstract

The invention discloses an automatic detection system and method for a welding practice board, which relates to the field of detection technology, and comprises: a control module, a camera and a welding practice board; the control module is respectively connected to the welding practice board and the camera for communication; the control module is used to control the working states of the welding practice board and the camera, and the control module is also used to provide a working voltage for the welding practice board; the welding practice board is fixed in front of the camera; compared with the prior art, the welding practice board is divided into a plurality of detection areas through a K210 main control board, and whether the LED lights in the detection areas are on is detected to detect whether the welding in the detection areas is normal, and the number of normal marks is used to calculate the score, thereby realizing automatic inspection of the welding quality of the welding practice board and statistical results.

Description

Technical Field

[0001] The present invention relates to the field of detection technology, and in particular to an automatic detection system and method for a welding practice board. Background Art

[0002] In the process of electrical teaching, it is very important for students to master the soldering of SMD components. However, with the existing soldering practice boards, teachers need to check the quality of students' soldering one by one and record students' scores manually, which is very cumbersome.

[0003] For example, a SMD component welding practice board disclosed in Chinese invention CN102819974A includes a welding practice area and a welding assessment area. The welding practice area is provided with soldering pads for various common SMD components. The welding assessment area and the welding practice area are designed on the same printed circuit board. An LED test circuit for testing the welding status of components is provided in the welding assessment area. The invention uses LED to determine whether the welding circuit is normal, but teachers are still required to check one by one and manually count the scores. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the above defects in the prior art, how to automatically check the welding quality of the welding practice board and calculate the results.

[0006] 2. Technical Solution

[0007] In order to solve the above problems, a welding practice board automatic detection system is provided, which includes a control module, a camera and a welding practice board;

[0008] The control module is respectively connected to the welding practice board and the camera for communication;

[0009] The control module is used to control the working state of the welding practice board and the camera, and the control module is also used to provide working voltage for the welding practice board;

[0010] The welding practice board is fixed in front of the camera. An indicator light is provided on the welding practice board. The control module divides the welding practice board into several detection areas according to the image collected by the camera. The control module drives each detection area in turn. If the indicator light in the driven detection area lights up, the control module marks the detection area as normal; if the indicator light in the driven detection area does not light up, the control module marks the detection area as faulty.

[0011] Among them, the welding practice board automatic detection system also includes an LCD screen, which is used to display the image collected by the camera and also to display the mark of normal or faulty detection area.

[0012] The welding practice board includes a first practice area, in which a 555 oscillator circuit is arranged. The 555 oscillator circuit is used to practice welding of 0603 resistor and capacitor packages, 0805 light-emitting diode packages and SOP8 packages.

[0013] Among them, a dual triode astable oscillation circuit is also set up in the first practice area. The dual triode astable oscillation circuit is used to practice the welding of 0603 resistor and capacitor packages, 0805 light-emitting diode packages, and SOT23 packages.

[0014] The welding practice board includes a second practice area, in which a 3-8 decoder circuit is also provided. The 3-8 decoder circuit is used to practice the welding of 0603 resistor and capacitor packages, 0805 light-emitting diode packages, and SOP16 packages.

[0015] Among them, the control module is the K210 main control board.

[0016] Among them, the welding practice board is connected to the control module through the TTL serial port.

[0017] Among them, the control module divides the welding practice board into several detection areas through the library function of OPENMV.

[0018] A welding practice board automatic detection method, the method is implemented by the following welding practice board automatic detection system, the system includes a control module, a camera and a welding practice board;

[0019] The control module is respectively connected to the welding practice board and the camera for communication;

[0020] The control module is used to control the working state of the welding practice board and the camera, and the control module is also used to provide working voltage for the welding practice board; an indicator light is provided on the welding practice board;

[0021] The automatic detection method of the welding practice board includes the following steps:

[0022] Step 1. Fix the welding practice board in front of the camera;

[0023] Step 2: The control module divides the welding practice board into several detection areas according to the images collected by the camera;

[0024] Step 3: The control module drives each detection area in turn. If the indicator light in the driven detection area is on, the control module marks the detection area as normal; if the indicator light in the driven detection area is not on, the control module marks the detection area as faulty.

[0025] 3. Beneficial effects of the present invention

[0026] The K210 main control board divides the welding practice board into several detection areas, and detects whether the LED lights in the detection area are on to detect whether the welding in the detection area is normal, and calculates the score based on the number of normal marks, thereby realizing automatic inspection of the welding quality of the welding practice board and statistical results. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a module diagram of an embodiment of the present invention;

[0028] Figure 2 It is the principle diagram of the 555 oscillation circuit of the present invention;

[0029] Figure 3 It is the principle diagram of the dual triode astable oscillation circuit of the present invention;

[0030] Figure 4 It is the circuit principle diagram of 3-8 decoder of the present invention;

[0031] Figure 5 This is a schematic diagram of an LED circuit connected to a flexible PCB of the present invention;

[0032] Figure 6 It is the control circuit principle diagram of the present invention;

[0033] Figure 7 This is a schematic diagram of the functional pin connection circuit of the K210 main control board of the present invention;

[0034] Figure 8 It is a schematic diagram of the connection circuit between the K210 main control board and the camera of the present invention;

[0035] Fig. 9 It is a schematic diagram of the connection circuit between the K210 main control board and the liquid crystal screen of the present invention. DETAILED DESCRIPTION

[0036] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0037] like Figure 1-6 As shown, in this embodiment, the control module is a K210 main control board, and the welding practice board includes a first practice area, a second practice area, a third practice area and a control circuit:

[0038] The first practice area includes 555 oscillator circuit and dual triode astable oscillator circuit. The 555 oscillator circuit is used to practice the welding of 0603 resistor and capacitor package, 0805 LED package and SOP8 package. When the welding of this circuit is normal, the LED D2 flashes. The dual triode astable oscillator circuit is used to practice the welding of 0603 resistor and capacitor package, 0805 LED package and SOT23 package. When the welding of this circuit is normal, the LED D3 and the LED D4 flash alternately.

[0039] The second practice area is the 3-8 decoder circuit, which is used to practice the welding of 0603 resistor and capacitor packages, 0805 LED packages, and SOP16 packages. LEDs D6 to D19 can be lit in different combinations according to different input signals from network tags KEY1 to KEY3. In this embodiment, after the circuit is welded normally, LEDs D6 to D19 are all lit.

[0040] The third practice area is an LED circuit connected to a flexible PCB, which is used to practice the welding of 0603 resistor and capacitor packages, 0805 LED packages, and SOT23 with flexible PCBs. LEDs D5 to D18 can be lit in different combinations according to different input signals from network labels LED_MC1 to LED_MC7. In this embodiment, after the circuit is welded normally, all LEDs D5 to D18 are lit.

[0041] The control circuit is used to control the lighting combination mode of the LED lights in the second practice area and the third practice area. In this embodiment, the model of ICU2 is STM32F103C8T6;

[0042] The K210 main control board provides 3.3V working voltage for the welding practice board, and the welding practice board communicates with the K210 main control board via the TTL serial port.

[0043] Connect the completed welding practice board to the K210 main control board, provide 3.3V power to the welding practice board through the K210 main control board, and realize the two boards communicating through the TTL serial port;

[0044] The welding practice board automatic detection system realizes automatic detection through the following steps:

[0045] Step 1. Fix the welding surface of the welding practice board in front of the camera;

[0046] Step 2: The K210 main control board obtains the image of the welding machine practice board through the camera;

[0047] Step 3, the K210 main control board uses the OPENMV library function to divide the 555 oscillator circuit in the first practice area into the first detection area, the dual triode astable oscillator circuit into the second detection area, the 3-8 decoder circuit in the second practice area into the third detection area, and the LED circuit connected to the flexible PCB in the third practice area into the fourth detection area;

[0048] Step 4: For each detection area of ​​the K210 main control board, if the LED light in the driven detection area is on, the detection area is marked as normal; if the LED light in the driven detection area is not on, the detection area is marked as faulty;

[0049] Step 5: The K210 main control board counts the number of normal marks and calculates the score according to the preset score weight.

[0050] The score weight can be set according to actual needs. In this example, the score weight of each detection area is 25%.

[0051] The LCD screen is used to display the image captured by the camera, and is also used to display the mark of normal or faulty detection area, as well as the score finally calculated by K210.

[0052] The K210 main control board divides the welding practice board into several detection areas, and detects whether the LED lights in the detection area are on to detect whether the welding in the detection area is normal, and counts the number of normal marks to calculate the score, thereby realizing automatic inspection of the welding quality of the welding practice board and statistical results.

[0053] The above implementation modes are only used to illustrate the present invention, but not to limit the present invention. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also belong to the scope of the present invention. The patent protection scope of the present invention should be defined by the claims.

Claims

1. An automatic detection system for welding practice boards, characterized in that: The system includes a control module, a camera and a welding practice board; The control module is respectively connected to the welding practice board and the camera for communication; The control module is used to control the working states of the welding practice board and the camera, and the control module is also used to provide working voltage for the welding practice board; The welding practice board is fixed in front of the camera, and an indicator light is provided on the welding practice board. The control module divides the welding practice board into several detection areas according to the image collected by the camera and through the library function of OPENMV. The control module drives each detection area in turn. If the indicator light in the driven detection area is on, the control module marks the detection area as normal. If the indicator light in the driven detection zone is not illuminated, the control module marks the detection zone as faulty; The control module is a K210 main control board, which counts the number of normal marks and calculates the score according to a preset score weight; The welding practice board includes a first practice area, in which a 555 oscillator circuit is arranged, and the 555 oscillator circuit is used to practice welding of 0603 resistor and capacitor packages, 0805 light-emitting diode packages and SOP8 packages; The first practice area is also provided with a dual triode astable oscillator circuit, which is used to practice welding of 0603 resistor and capacitor packages, 0805 light-emitting diode packages, and SOT23 packages; The 555 oscillator circuit in the first practice area is divided into the first detection area, and the dual triode astable oscillator circuit is divided into the second detection area.

2. The automatic detection system for welding practice board according to claim 1, characterized in that: The welding practice board automatic detection system also includes a liquid crystal screen, which is used to display the image collected by the camera and also to display a mark indicating whether the detection area is normal or faulty.

3. The automatic detection system for welding practice board according to claim 2, characterized in that: The welding practice board includes a second practice area, in which a 3-8 decoder circuit is also arranged. The 3-8 decoder circuit is used to practice welding of 0603 resistor and capacitor packages, 0805 light-emitting diode packages, and SOP16 packages.

4. The automatic detection system for welding practice board according to claim 1, characterized in that: The welding practice board is connected to the control module through a TTL serial port.

5. A method for automatically detecting a welding practice board, characterized in that: The method is implemented by the following welding practice board automatic detection system, which includes a control module, a camera and a welding practice board; The control module is respectively connected to the welding practice board and the camera for communication; The control module is used to control the working status of the welding practice board and the camera, and the control module is also used to provide working voltage for the welding practice board; an indicator light is provided on the welding practice board; The welding practice board includes a first practice area, in which a 555 oscillator circuit is arranged, and the 555 oscillator circuit is used to practice welding of 0603 resistor and capacitor packages, 0805 light-emitting diode packages and SOP8 packages; The first practice area is also provided with a dual triode astable oscillator circuit, which is used to practice the welding of 0603 resistor and capacitor packages, 0805 light-emitting diode packages, and SOT23 packages; the automatic detection method of the welding practice board includes the following steps: Step 1, fix the welding practice board in front of the camera; Step 2, the control module divides the welding practice board into several detection areas according to the image collected by the camera and through the library function of OPENMV; the 555 oscillation circuit in the first practice area is divided into the first detection area, and the dual triode astable oscillation circuit is divided into the second detection area; Step 3, the control module drives each detection area in turn, and if the indicator light in the driven detection area is on, the control module marks the detection area as normal; If the indicator light in the driven detection area is not on, the control module marks the detection area as a fault. The control module is a K210 main control board. The K210 main control board counts the number of normal marks and calculates the score according to a preset score weight.

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