Measuring Distance With Laser Sensor Technology

Manufacturing inspection applications that once required simple presence and absence detection of an object now ask sensors to solve demanding measurement and quality control tasks. Obtaining accurate and stable measurements is crucial to ensure consistent product quality and continuous production.

Laser sensor technology can solve these inspection applications with high-speed, high-precision performance. It can be used on multiple materials, reflective surfaces and colors, allowing manufacturers to collect continuous measurements in a range of industries, including applications with moving processes, stamped or machine parts, and soft or sticky parts.

Advanced laser sensors comprise a rugged, self-contained housing, a pinpoint laser emitter, a linear imager and user configurable outputs. Laser sensors require no external controller for adjustments. Operators can simply place the laser sensor in any location—including inaccessible areas of the machine or harsh environments—and make all necessary adjustments and configurations through various software tools.

 
Source: Banner Engineering
Automatic laser power and measurement rate control ensure reliable measurement under changing or challenging target conditions.

Linear Imagers
The linear imager is one of the primary components of a modern-day laser distance sensor, defined as the eye of the sensor, and is made of hundreds or thousands of pixels arranged in a line. Some advanced laser sensors operate based on the principle of optical triangulation, which incorporates the linear imager. The linear image is used to detect precisely where the target is in front of the sensor—ultimately resulting in an accurate, stable measurement. A laser emitter transmits visible laser light through a lens, towards a target or object. The laser light is reflected diffusely from the surface of the target, where a receiver lens on the sensor then focuses that reflected light, creating a spot of light on the linear imager.

The target's distance from the sensor determines the angle the light travels through the receiver lens; this angle then determines where the received light will hit the linear imager. If the target is far away (at the maximum specified range), then the light will fall toward the end of the imager closest to the laser emitter. Alternatively, if the target is at its closest position (at the minimum specified range), then the light will land at the opposite end of the imager farthest away from the laser emitter. The position of the light on the linear imager is calibrated in the factory for all valid target distances. The received light is processed through analog and digital electronics and analyzed by the digital signal processor (DSP), which determines the distance to the current target relative to the start of the measurement range very precisely by calculating the location of the received light on the linear imager and updating the sensor output to indicate the correct target distance.

Read more of this article: http://www.bannerengineering.com/en-US/ljyhs

More News:

  • Patent Dispute Settled Between Rockwell Automation and Beckhoff Automation

    Rockwell Automation's linear motor business, including its recent Jacobs Automation acquisition, has developed a substantial portfolio of patents comprising over 100 issued patents on linear motor technology alone.

  • Mergers, Acquisitions Alliances and Noteworthy News in Robotics

    Iten Industries, manufacturer of advanced composite components and materials headquartered in Ashtabula, Ohio, is now offering additive manufacturing and 3D printing services.

  • U.S. Economy Looks Up for Manufacturing Industries

    The August PMI is led by the highest recorded New Orders Index since April 2004, when it registered 67.1%.

  • ASME Forum Ignites 21st-Century Engineering

    Founder and president of HMI/SCADA software developer Iconics, Russ Agrusa, said the company is focusing on how to harness big data on any device and in any class of applications, and turn it into predictive analytics in manufacturing and business intelligence.

  • New Customer Care Center for Endress+Hauser

    To help customers keep up with today's challenges, Endress+Hauser's new, state-of-the-art Customer Center is suited to greet visitors with a top-notch certified training facility with multiple classrooms and its largest yet PTU controlled by Rockwell Automation's PlantPAx system for real-world process simulation with over 120 measuring points.

  • The Rise of Aluminum in the Industrial Sector

    It is not just price that makes aluminum appealing when put alongside copper in the production of items like electrical wires and cables, though.

  • Maverick Acquires CQS Innovation Expanding Process Expertise in the Life Sciences Industry

    The acquisition expands Maverick's size and scale as a global organization with 19 office locations and 500+ engineering professionals. In addition, Chris Roerig, current president of CQS Innovation, will join Maverick as industry manager for life sciences.

  • ISA Offers Cybersecurity Certificate Program

    The program consists of passing a course on using the ANSI/ISA-62443 standards to secure industrial control systems. The course is available in the classroom or online. Students must also pass a written exam in the classroom or online.

  • Fieldbus Groups 'Unite'

    The combined power of both organizations will aim to protect the investments that end users in process automation have made in HART and Foundation fieldbus communication technologies.

  • Guess Who Just Turned 125 Years Old?

    ABB recently celebrated its 125th anniversary in Finland.

All news »

What are your comments?

Join the discussion today. Login Here.

Comments

No one has commented on this page yet.

RSS feed for comments on this page | RSS feed for all comments