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Visual sensor working state testing method
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A visual sensor, working state technology, applied in instruments, image data processing, computing, etc., can solve problems such as large errors, eye fatigue or damage, and large time costs
Pending Publication Date: 2021-03-05
易思维(杭州)科技有限公司
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[0004] At present, the method of verifying the working status of the visual sensor is manual observation and testing. The tester sends a single command to the sensor through the host computer, and then observes whether the status of the sensor is consistent with the status of the issued command. This method has the following disadvantages: test efficiency Low, it takes a lot of time to test the entire working path; observing the brightness of the light source or image quality with the naked eye has large errors and is prone to misjudgment; visual sensors are often used for strong light sources or lasers, etc. Long-term naked eye testing will cause eye fatigue or damage
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Embodiment 1
[0034] A method for testing the working state of a glue detection visual sensor, such as figure 1 As shown, the glue detection visual sensor includes 3 uniformly distributed cameras and built-in light sources that project three primary colors (red, green, blue);
[0035] The test steps are as follows:
[0036] Change the color of the light source according to the actual detection state, and the light source illuminates the color target I (such as figure 2 shown), the color of the color target corresponds to the color of the light source; the camera of the visual sensor collects the target image and transmits it to the processor;
[0037] The light source projects red, green, and blue light according to the preset process; the target image collected by each camera contains all the colors of the color target, and the image collected by the camera is marked as the target image I;
[0038] The processor processes the received target image I, calculates the average gray level of...
Embodiment 2
[0048] A method for testing the working state of a visual sensor, the present embodiment takes four camera visual sensors as an example, such as Figure 4 As shown, the visual sensor includes four cameras and external light sources that project three primary colors (red, green, blue);
[0049] In this embodiment, the color setting of target 1 is as follows Figure 5 As shown, the color of the color target corresponds to the color of the light source, and the image collected by the camera is the target image I;
[0050] Follow the principle that the gray values of the different colors in the target image used in the target image II have a difference of at least 10 in gray value, such as Image 6As shown, the color target II has four colors of red, green, blue, and purple, which are consistent with the number of cameras. Each camera captures different color areas of the target image, and the target image collected by the camera is marked as target image II;
[0051] The test...
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Abstract
The invention provides a visual sensor working state test method, a visual sensor is provided with a light source, and the test steps are as follows: the light source can project any two-color light or three-color light in three primary colors; the color of the color target is the same as that of the light projected by the light source; a target image acquired by the camera is marked as a target image I; or the color targets have a plurality of different colors, the number of the cameras is two or more, and target images collected by the cameras are marked as target images II; the processor processes the received target image I and judges whether the color of the light projected by the light source is the same as a preset color or not; or the processor processes the received target image II and judges whether the working camera is a preset camera or not. In the whole testing process, a tester does not need to monitor the state of the sensor, only an upper computer needs to be operatedfor data information comparison, and the testing process is simple, efficient and high in precision.
Description
technical field [0001] The invention relates to the application field of visual sensors, in particular to a method for testing the working state of a visual sensor. Background technique [0002] Vision sensors are used to obtain the raw images required by the entire machine vision system, including one or more cameras, sometimes with laser projectors, light sources and other auxiliary equipment. Taking automobile glue detection as an example, the existing glue detection sensor is equipped with multiple cameras and matched with light sources. Realize all-round detection of rubber strips. [0003] For the above-mentioned gluing detection sensor, the current gluing detection process is mainly divided into two steps: the teaching process and the measurement process. The teaching process is to use the relevant prior information to test the switching of the light source color and the switching of the camera. This process obtains the camera and light source color that should be u...
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Application Information
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