Sheet metal visual inspection acquisition terminal and method

Abstract

The invention discloses a sheet metal visual inspection acquisition terminal and method. The terminal includes a visual capture unit, a part measurement platform and a light homogenizing unit. The light homogenizing unit includes a delay board, a controller, light sensors, a computer control switch, a frame, and a light homogenizing board and dedicated light tubes, wherein the light homogenizing board is installed in the frame, the dedicated light tubes and the light sensors are evenly mounted on the light homogenizing board, the light homogenizing board is divided into multiple units, a lightshielding board is arranged on each unit, each light shielding board, the dedicated light tubes and the light sensors are connected to the controller, and the controller compares the light level information transmitted by the light sensors with a preset value and then automatically adjusts the number of the light shielding boards and the dedicated light tubes to be turned on. In this way, the light homogenizing unit can automatically realize the best light supplement effect according to the actual situation to remove the shadow of a part placed on the part measurement platform and improve theaccuracy of measuring the object to be measured. The method has direct and eye-catching measurement results and a low misjudgment rate.

Description

technical field

[0001] The invention relates to the field of sheet metal detection, in particular to a sheet metal visual detection acquisition terminal and method. Background technique

[0002] Traditional inspection methods in sheet metal manufacturing: Manual measurement methods such as vernier calipers and tape measures cannot guarantee product quality. The first piece of sheet metal parts is particularly important, which directly affects the quality and efficiency of the entire manufacturing process. Therefore, how to improve the quality of the first piece Inspection has become a crucial goal in the sheet metal manufacturing industry. With the advancement of science and the improvement of technology, computer vision imaging technology is becoming more and more mature, and the use of computer vision imaging for size measurement has become the new darling of the entire manufacturing industry, which solves the bottleneck of the inability to accurately and intelligently mea...

Examples

Embodiment 1

[0033] Such as figure 1 As shown, the present invention includes a sheet metal visual detection acquisition terminal, including a visual capture unit 1, a part measurement platform 2 and a uniform light unit 3. The visual capture unit 1 includes a box body, a special camera and a corner nut, and the corner nut is connected to the box. body, the professional camera is installed in the box body through the camera base, the box body connected to the professional camera can rotate the position, and the special camera is facing the part measurement platform 2; Switches, frames, dodging panels and special lamps, the dosing board is installed in the frame, multiple special lamps and photosensitive sensors are evenly installed on the dosing board, the dosing board is divided into multiple units, each unit is equipped with a shading Each shading plate, multiple special lamps and multiple photosensitive sensors are connected to the controller. The controller compares the light brightnes...

Embodiment 2

[0038] Present embodiment is preferably as follows on the basis of embodiment 1: the area of ​​shading plate is at 4cm 2 -8cm 2 between. Set the area of ​​the shading plate to a smaller area, and control the closing of the shading plate through the controller to achieve accurate light supplement. The light fill accuracy can reach between 1% and 3%, which can fully meet the needs of various types of parts. light needed.

[0039] A temperature sensor is also connected to the time delay board, and a heat dissipation unit is arranged at the bottom of the sheet metal visual detection and collection terminal 3 of the uniform light unit, and the temperature sensor is connected to the heat dissipation unit. Due to the severe heat generated by the special lamp tube, if it is not dissipated in time, it will easily cause damage to the components. The temperature sensor in this solution can collect the temperature of the uniform light unit and transmit the temperature to the delay board...

Embodiment 3

[0044] The sheet metal visual detection collection method includes the following steps:

[0045] Step A) Connect the computer control switch to an external computer terminal, open the terminal, and place the part to be tested on the part measurement platform;

[0046] Step B) import the CAD graphics file corresponding to the part to be tested at the computer terminal;

[0047] Step C) The controller on the uniform light unit compares the light information fed back by the photosensitive sensor with the preset value, and then automatically adjusts the number of open shading plates and special lamps, and then obtains the actual outline of the part through the digital camera ;

[0048] Step D) comparing the actual contour drawing of the part to be tested with the CAD graphics of the part to be tested;

[0049] Step E) setting color deviation bands, representing different deviation ranges through different colors;

[0050] Step F) displaying the deviation state of the part;

[...

technical field

[0001] The invention relates to the field of sheet metal detection, in particular to a sheet metal visual detection acquisition terminal and method. Background technique

[0002] Traditional inspection methods in sheet metal manufacturing: Manual measurement methods such as vernier calipers and tape measures cannot guarantee product quality. The first piece of sheet metal parts is particularly important, which directly affects the quality and efficiency of the entire manufacturing process. Therefore, how to improve the quality of the first piece Inspection has become a crucial goal in the sheet metal manufacturing industry. With the advancement of science and the improvement of technology, computer vision imaging technology is becoming more and more mature, and the use of computer vision imaging for size measurement has become the new darling of the entire manufacturing industry, which solves the bottleneck of the inability to accurately and intelligently mea...

Examples

Embodiment 1

[0033] Such as figure 1 As shown, the present invention includes a sheet metal visual detection acquisition terminal, including a visual capture unit 1, a part measurement platform 2 and a uniform light unit 3. The visual capture unit 1 includes a box body, a special camera and a corner nut, and the corner nut is connected to the box. body, the professional camera is installed in the box body through the camera base, the box body connected to the professional camera can rotate the position, and the special camera is facing the part measurement platform 2; Switches, frames, dodging panels and special lamps, the dosing board is installed in the frame, multiple special lamps and photosensitive sensors are evenly installed on the dosing board, the dosing board is divided into multiple units, each unit is equipped with a shading Each shading plate, multiple special lamps and multiple photosensitive sensors are connected to the controller. The controller compares the light brightnes...

Embodiment 2

[0038] Present embodiment is preferably as follows on the basis of embodiment 1: the area of ​​shading plate is at 4cm 2 -8cm 2 between. Set the area of ​​the shading plate to a smaller area, and control the closing of the shading plate through the controller to achieve accurate light supplement. The light fill accuracy can reach between 1% and 3%, which can fully meet the needs of various types of parts. light needed.

[0039] A temperature sensor is also connected to the time delay board, and a heat dissipation unit is arranged at the bottom of the sheet metal visual detection and collection terminal 3 of the uniform light unit, and the temperature sensor is connected to the heat dissipation unit. Due to the severe heat generated by the special lamp tube, if it is not dissipated in time, it will easily cause damage to the components. The temperature sensor in this solution can collect the temperature of the uniform light unit and transmit the temperature to the delay board...

Embodiment 3

[0044] The sheet metal visual detection collection method includes the following steps:

[0045] Step A) Connect the computer control switch to an external computer terminal, open the terminal, and place the part to be tested on the part measurement platform;

[0046] Step B) import the CAD graphics file corresponding to the part to be tested at the computer terminal;

[0047] Step C) The controller on the uniform light unit compares the light information fed back by the photosensitive sensor with the preset value, and then automatically adjusts the number of open shading plates and special lamps, and then obtains the actual outline of the part through the digital camera ;

[0048] Step D) comparing the actual contour drawing of the part to be tested with the CAD graphics of the part to be tested;

[0049] Step E) setting color deviation bands, representing different deviation ranges through different colors;

[0050] Step F) displaying the deviation state of the part;

[...

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