Terminal Height Measurement

Project Background

Measurement Background

To ensure the quality and safety of product terminals and optimize their performance, manufacturers need to strictly control every step of the production process, including the dimensional precision of terminals. 3D terminal height detection aims to achieve precise measurement of the physical dimensions of product terminal heights through 3D height detection tools.

Measurement Item

Terminal height

Solution

AI-Vision uses the cropping tool to cut out the terminal section, creates an ROI array at the terminal position, and uses the height tool for one-click measurement.

Design Concept

Execution Result Display

Project Process

I. Initialization

1. Select Load Point Cloud to obtain the point cloud
   

2. Select 3D Crop tool to crop out excess noise.
   

II. Preprocessing

Position Adjustment

1. Use the 3D Square Probe tool to find the left and top straight lines of the point cloud.

2. Use the 3D Geometry Intersection tool to calculate the intersection point of the two lines detected in the previous step.

3. Use the 3D Position Adjustment tool to adjust the positioning to the intersection point of the two lines.

Plane Fitting

1. Use the Create ROI tool to select the reference area.

2. Use the 3D Plane Fitting tool to fit the plane based on the area selected in the previous tool and set it as the zero plane.

Crop Terminal Area

Use the 3D Point Cloud Crop tool to set the z range and crop out the terminal area.

Terminal Height Measurement

Achieve the measurement of all terminal heights through a loop array ROI. Each loop measures the height of two adjacent columns of terminals. The method for measuring terminal height: terminal measurement height - reference area measurement height.

1. Use the Lua Script tool to initialize the loop start value and initial box; Provide the loop start value 1 and the box position information for the first row of two adjacent terminals.

SetIntVariable("loop", 1)
SetFloatArrayVariable("h_dif", {})

SetFloatVariable("box_sx", 0.635)
SetFloatVariable("box_sy", -4.844)
SetFloatVariable("box_sz", -0.362)
SetFloatVariable("box_ex", 0.881)
SetFloatVariable("box_ey", -4.690)
SetFloatVariable("box_ez", 0.354)

SetFloatVariable("box_d_sx", 1.200)
SetFloatVariable("box_d_sy", -5.173)
SetFloatVariable("box_d_sz", -0.204)
SetFloatVariable("box_d_ex", 1.284)
SetFloatVariable("box_d_ey", -5.029)
SetFloatVariable("box_d_ez", 0.400)

2. Use the Marker tool to mark the loop start.

3. Use the Lua Script tool to output the first row boxes of two adjacent terminal columns and the reference box positions for calculating height based on the box position information output from the previous Lua script.

SetBox("box", box_sx, box_sy, box_sz, box_ex, box_ey, box_ez)

SetBox("box2", box_sx + 0.4, box_sy, box_sz, box_ex + 0.4, box_ey, box_ez)

SetBox("box_d", box_d_sx, box_d_sy, box_d_sz, box_d_ex, box_d_ey, box_d_ez)

4. Use the Create ROI Array tool, using the box output from the previous step as the manual mode input area, and array one column of boxes based on calculated number of rows, columns, and row/column spacing.

5. Use the 3D Height tool to calculate the height of all boxes within the area of the column of boxes arrayed using the Create ROI Array tool in the previous step.

6. Use the Lua Script tool, bind the height data of adjacent two terminal columns and the reference height data of the baseline position for calculating height, calculate the terminal height and save it to the CSV file.

-- 生成csv文件
--csv文件初始化
csvHead = ""
--将count修改成您需要保存的列数
for i=1,18,1 do     
    --将"Name"修改为"您需要的列名"   
    csvHead = csvHead .. "H" .. i .. ","
end
csvHead = csvHead .. "\n"
--创建文件，脚本第一次运行时，没有就创建
--将"./Save.csv"修改为"您想要保存的文件名.csv"
if FileExists("./Save.csv") == false then
    PrintToFile("./Save.csv", csvHead)
end

save_h = ""

for i=1, #input1, 1 do
    
    save_h = save_h .. (input0[i] - input1[i]) .. ","
end
save_h = save_h .. "\n"

for i=1, #input1, 1 do
    
    save_h = save_h .. (input2[i] - input1[i]) .. ","
end
save_h = save_h .. "\n"

if FileExists("./Save.csv") == true then
    PrintToFile("./Save.csv", save_h)
end

7. Use the Variable Setting tool to increment the loop variable by 1.

8. Use the Conditional Branch tool to implement the following: when the loop is greater than or equal to 15, the conditional branch is not executed and the project ends. When the loop is less than 15, jump to the loop marker to continue executing the next loop to calculate the height of the next two columns of terminals.

9. Use the Lua Script tool to set the box position values for the first row of the next two terminal columns For the first 7 groups and the last 7 groups of terminals.

if loop ~= 8 then
    SetFloatVariable("box_sx", box_sx + 1)
    SetFloatVariable("box_ex", box_ex + 1)
    SetFloatVariable("box_d_sx", box_d_sx + 1)
    SetFloatVariable("box_d_ex", box_d_ex + 1)
else
    SetFloatVariable("box_sx", box_sx + 3)
    SetFloatVariable("box_ex", box_ex + 3)
    SetFloatVariable("box_d_sx", box_d_sx + 3)
    SetFloatVariable("box_d_ex", box_d_ex + 3)
end

10. Use the Jump tool to jump to the loop start marker.