Force sensor explosion vision system in these robot applications

Industrial robots have not been able to monitor the environment around them for many years. As more and more different sensors are introduced into the robot , they can now “feel” what they are dealing with and “see” what they are doing or who is around them. However, force sensing is less popular than visual systems, although it is as useful as vision and sometimes even more useful. The visual system is powerful, but it doesn't solve all the problems, and it's expensive. Let's take a look at which applications, the force sensor can completely blast the visual system, saving you money and practicality.

Force sensing can be obtained by a force sensor embedded in the robot arm, and most of the collaborative robots on the market are already available. I have embedded force feedback loops on the Uniro robots, they can do what I want. The only downside to using a built-in force sensor is that you don't have a device with the same precision to "read" the force. Most of the built-in force sensors measure the force by reading the current of the robot. Of course, some force sensors use other means, such as determining the amount of force applied to the material based on its deformation.

Constant force

Torque sensors were first manufactured for applications such as sanding and polishing. Because these applications are difficult to automate, because the robot needs some force feedback to determine that it is not enough force.

By introducing a force feedback loop into your program, you can easily automate these applications and achieve consistent manufacturing processes. In this case, you need to use an external device instead of an embedded solution from a robot manufacturer.

2. Target positioning

We often come into contact with customers who generally believe that the only way to locate and quantify parts is to use a vision sensor. But in reality this is not the only solution. It is undeniable that the vision system is a good way to locate or quantify components, but it is also feasible to use force sensors to find and detect components. Determining their position on the XY plane is one thing, and determining their height is another matter. In fact, to do this, you need a 3D vision system. If it's a bunch of objects, you don't need to know the exact tree of the whole object. Just look at the pile of objects every time. The robot only needs to determine the height of the pile of objects and then adjust its grip height continuously.

Another search function that uses a force sensor is the "free mode" of the sensor. This may be due to the failure to take full advantage of the parameters of the FT sensor. The "Free Mode" or "Zero Gravity" mode will allow you to "liberate" the robot's axis, which will enable it to improve its compliance. For example, if you want to tighten a part on a CNC machine, you can free up 2 axes to make the part fit perfectly, while still maintaining a certain grip. This allows the force to act entirely on the center of the component without additional force on the axis of the robot.

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