STI: Safety laser scanners guard areas near machines


A safety laser scanner, among newest technologies to be used for machine area safeguarding, uses a small optical sensor, pulses laser light to monitor surroundings, compares results to a predefined zone, and sends a stop signal to connected machinery when an intrusion is detected, according to Scientific Technologies Inc.

Its advantage over other technologies, STI says, is “versatility and non-intrusive presence.” Unlike hard guards such as fences or safety floor mats, the laser scanner works without physical barriers so is perfect for equipment that requires regular maintenance and cleaning. “Fewer hardguards are needed, allowing sweepers, forklifts, and loaders to transit through its protection area.”

STI explains that “Safety laser scanners function by using a‘time of flight’ measurement to determine distance. The scanner emits a light pulse; the light then hits the first object in its path and is reflected back to the scanner. Then the scanner compares the distance against the known size of its safety zone. If the scanner senses an intrusion into the safety zone, it sends a stop signal to the guarded machinery. This sequence is repeated as the optical assembly rotates, scanning the guarded area.”

The advice came in STI’s 850-page “2006-2007 Engineering Guide to Machine and Process Safeguarding,” which includes tutorial information and product examples for safety laser scanners, perimeter access guards, safety light curtains, resource modules, safety mats and area guards, safety interlock switches, and safety monitoring relays. Hydraulic press-brake guards, safety contact strips and edges, two-hand controls, enabling switches, and process safeguards are also featured. New product categories include safety awareness signs, disconnect switches and motor starters, as well as cutting and turning machine safety.

—Mark T. Hoske, editor-in-chief, Control Engineering,

No comments
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
This eGuide illustrates solutions, applications and benefits of machine vision systems.
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
Make Big Data and Industrial Internet of Things work for you, 2017 Engineers' Choice Finalists, Avoid control design pitfalls, Managing IIoT processes
Engineering Leaders Under 40; System integration improving packaging operation; Process sensing; PID velocity; Cybersecurity and functional safety
Mobile HMI; PID tuning tips; Mechatronics; Intelligent project management; Cybersecurity in Russia; Engineering education; Road to IANA
This article collection contains several articles on the Industrial Internet of Things (IIoT) and how it is transforming manufacturing.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

SCADA at the junction, Managing risk through maintenance, Moving at the speed of data
Flexible offshore fire protection; Big Data's impact on operations; Bridging the skills gap; Identifying security risks
The digital oilfield: Utilizing Big Data can yield big savings; Virtualization a real solution; Tracking SIS performance
click me