SINGLE POINT PROFILE SENSORS
Single point profile sensors are laser distance measurement devices. They operate on the triangulation principle, projecting a single laser spot onto the target.
Single point sensors are capable of profiling a contour of a target along the direction of part travel, or measuring displacement in a fast moving process. They are frequently used to measure thickness, height, and surface roughness, as well as monitor target position for closed loop control.
Single Points have very high sampling rates (up to 32,000 Hz), which makes them ideal for monitoring high-speed operations. Also, they can rapidly and automatically respond to targets with surfaces that change in color or reflectivity.
MULTI-POINT PROFILE SENSORS
Multi-point profile sensors are a simple extension to single-point profile sensors. These sensors project and image multiple laser spots from a single package, which provides multiple discrete profiles as the target moves past the sensor.
Functionally, multi-point sensors are equivalent to mounting a number of single point sensors side by side, but offer many advantages:
- Acquisition cost usually lower than multiple sensors
- Simplified mounting – only one mount required
- Simplified cabling – needs only a single cable set
- Factory pre-calibrated with laser spots aligned
Multipoint sensors can rapidly and automatically respond to targets with surfaces that change in color or reflectivity. They are primarily used in lumber mill applications to optimize cutting paths and maximize yield.