Sensor technology developed for quality control (Part 2)

Thanks to advances in laser metering technology, sensors can now measure tougher targets (including clear, reflective and low-contrast targets) and can handle a wide variety of testing tasks. Look up with only one sensor.

In addition, with IO-Link communication, monitoring the performance of the sensor becomes easier, identifying trends in test results and even predicting when maintenance is needed to fix problems. try as simple as a dirty lens before the sensor breaks.

Dual mode sensors: Check more with fewer devices

One way smart sensors with cost-effective dual mode are to allow users to check multiple conditions with one device. In a recent application in electronics manufacturing, a single-mode dual laser distance sensor has been used for fault-tolerant integrated circuit chips in pocket-sized rollers.

Error request for this application requires determining the following conditions:

• Will a chip be successfully placed on a product? This is determined by the distance. Without the chip, the distance between the sensor and the target would be too large.
• Is more than one chip in each pocket? This is also determined by distance. If a second chip is stacked on top of the first chip, the distance between the sensor and the target will be too small.
• Is the chip positioned right above it to the right? This is determined by the contrast, because one side of the chip is darker than the other. The intensity of the light returning to the receiver’s receiver is lower if the dark side of the chip is facing up.

Usually in the old way, an application like this would need at least two sensors: one to detect changes in distance and one to detect contrast. With dual mode, a laser distance sensor can accurately detect all three conditions (missing, duplicated or chips deviated downwards) with only the same device.

Reliable measurement and uncovering challenging goals

In addition to allowing more testing with just one device, the dual-mode sensor can also verify the presence of targets that other laser and LED-based sensors often struggle to detect. include clear and reflective goals. Because they measure distances, laser sensors are also ideal for reliable testing in low-contrast applications where other sensors struggle (e.g. verifying the height of the spikes on internal tires. automotive industry).

Smart sensors can also detect if very little light is returned to the receiver, for example when dark objects are detected. The sensor will automatically adjust its exposure settings to further increase measurement efficiency and stronger measurement signals.

Productivity and Quality Office