SensoPart Introduces FT 25-RLAP ToF Sensor For Precise Measurement

SensoPart has released a new compact, time-of-flight (ToF) sensing device. The FT 25-RLAP features the ability to detect objects as far as 1.5 m away, to remove false positives from reflective materials and surfaces, and to narrow in on just the area that needs to be scanned for objects or workpieces.

SensoPart’s FT 25-RLAP TOF sensors can be used to detect and position objects moving on a track. Image used courtesy of SensoPart

Challenges in Time of Flight (ToF) Sensing

ToF sensing is a way to measure the distance or position of items. The device emits light, often from a laser, and measures the time it takes to receive the reflection. The distance can then be accurately calculated based on the speed of light. This method makes it useful for checking clearances, positioning workpieces for process operations, and so on.

While this works fantastically in theory, the reality is that ToF sensing has some challenges. Shiny objects nearby can reflect ambient light and fool the sensor. Consider a manufacturing environment filled with highly polished stainless steel surfaces, like those encountered in food and beverage manufacturing. The reflections from these surfaces can fool the sensor. The same is true for reflective materials, such as vests, gloves, etc, worn by employees in heavy manufacturing. Additionally, flashing lights, which are common in any manufacturing environment, can also cause false positives on the average ToF sensor.

The FT 25-RLAP ToF sensor features background noise suppression and window mode to narrow in on its targets. Image used courtesy of SensoPart

The FT 25-RLAP ToF Sensor

To address common ToF sensing challenges, the FT 25-RLAP sensors feature background noise suppression and window mode. The background noise suppression algorithm removes some of the reflections from objects in the environment, leading to more accurate measurements and fewer false positive strikes. The sensor’s window mode enables users to define an area of importance in the sensor’s view, eliminating even more background noise. It also allows the sensor to be installed in more locations, as unnecessary background items can simply be removed from the sensor’s view.

Outside of those key features, the device has a small footprint, measuring only 34 mm x 20 mm x 12 mm, yet can detect objects as far away as 1.5 m. Each FT 25-RLAP is IO-Link compatible with the 1.1.4 specification, meaning it can be easily integrated with existing industrial automation hardware.

Analog and switching outputs are also available, and operators can switch between modes with the press of a button. The analog output can be programmed with two teach points, and data is linear between those points. Those two teach points can be used to offset and remove some of the background as well.

The FT 25-RLAP is designed to bring compact precision measurement to various applications, including logistics, robotics, and manufacturing. Image used courtesy of SensoPart

Object Detection and Positioning

While the FT 25-RLAP can be used for numerous positioning and detection purposes, SensoPart calls out several specific applications. The ability to detect accurate positioning makes it well suited for packaging operations where finished workpieces must be placed in boxes for shipping, as well as picking operations where robotic manipulators are gripping objects to move them. Also, the accuracy is fine enough that the FT 25-RLAP can be used in robotic assembly operations, where small components and tight control are required.