Hello,
I need help on my project. I know laser is also used as measurement device, but the traditional laser measurement device uses point laser but i want to implement the same with line laser with triangulation method. I'm from Computer science background so I'm good in programming not that much in hardware. So please help me out..
What do you want to measure? Your question takes it for granted that we know, but I don't.
Johan_Ha:
What do you want to measure? Your question takes it for granted that we know, but I don't.
I'm trying to measure distance of multiple object at same time with line laser also the gap or space between the each objects.
Ok. So you aim your laser at first object and get the distance. You turn your laser at second object, measure the angle you twisted your laser and measure the distance.
Johan_Ha:
Ok. So you aim your laser at first object and get the distance. You turn your laser at second object, measure the angle you twisted your laser and measure the distance.
Thank you for your replies and it gives me hope. Actually i want to measure the distance at the same time with one shot with the laser. I have given my query in drawn format for clear understanding of what I'm really trying to do, Please find the image file in the attachment. I also want to know how to detect the line laser with CCD or CMOS sensors for further processing.
How does the laser divide into two beams? How will the beams be aimed to exactly hit the objects?
Johan_Ha:
How does the laser divide into two beams? How will the beams be aimed to exactly hit the objects?
I want to use LINE Laser like the one in the below attached image not the POINT Laser.
LiDAR can do this for you (and a lot more).
Ok, so the line is aimed at a sector. Inside this sector it hits various objects. It should recognise two objects of your interest. But the light also hits other objects in the background. If we'd get a scan of say a 90 degree sector, we'd get a distance for each degree. Or each 10th of degree. Depending on some accuracy. Say we have an array of 900 values, which are the distances to anything in the sector. From here we would pick two directions that could be the two objects we are interested in. This could work! But I still think a single laser beam would be a better approach. A mirror would aim the laser and make the 90 degree sweep. Make it fast enough so it would feel like a one shot.
aggu:
Thank you for your replies and it gives me hope. Actually i want to measure the distance at the same time with one shot with the laser. I have given my query in drawn format for clear understanding of what I'm really trying to do, Please find the image file in the attachment. I also want to know how to detect the line laser with CCD or CMOS sensors for further processing.
Perhaps you missed the section on distance measuring with a laser. You have to pulse the laser and measure the time for the pulse to return to the receiver. You have not shown how you will do either.
Paul
Johan_Ha:
Ok, so the line is aimed at a sector. Inside this sector it hits various objects. It should recognise two objects of your interest. But the light also hits other objects in the background. If we'd get a scan of say a 90 degree sector, we'd get a distance for each degree. Or each 10th of degree. Depending on some accuracy. Say we have an array of 900 values, which are the distances to anything in the sector. From here we would pick two directions that could be the two objects we are interested in. This could work! But I still think a single laser beam would be a better approach. A mirror would aim the laser and make the 90 degree sweep. Make it fast enough so it would feel like a one shot.
Thank you so much Johan_Ha now i got some idea. Now the next thing is how to detect the laser with either of the CCD or CMOS sensor or any other, For example the BAR CODE Scanner. Do i need to do image processing or something like that. The traditional pointed laser comes with receiver but i could not find any LINE laser diode with a detector in it. Could you please tell me a way to detect the LINE Laser and how the get the data.
The gap distance shown in the diagram attached to reply #4 cannot be determined by one shot of any type of laser distance sensor.
You get only one distance measurement per shot. So, make more than one measurement, scanning across the object field. The Lidar Lite should work well.
jremington:
The gap distance shown in the diagram attached to reply #4 cannot be determined by one shot of any type of laser distance sensor.You get only one distance measurement per shot. So, make more than one measurement, scanning across the object field. The Lidar Lite should work well.
yeah i know that, but my idea is to build Laser 3D scanner like system with Laser Triangulation Principle. With this i can get all the data to do stuffs. But the thing is now im stuck at how to detect the LINE laser either with CMOS and CCD sensors.
Your image is missing information. What is to be measured and based on what? I hate guessing.
But the thing is now im stuck at how to detect the LINE laser either with CMOS and CCD sensors.
Not an Arduino problem.