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Precise diameter measuring is our job, quality assurance is our commitment

We design and manufacture high accuracy Laser Micrometers and Laser Gauges for non-contact diameter measurement and control. Suitable for on-line or off-line application, to check a number of different products, to improve process efficiency by reducing scrap and manpower, to assure dimensional consistency and product quality.

What is a Laser Gauge?

ils80A Laser Gauge is an instrument suitable for outside diameter measurement, featuring

• Contact-less operation
• High Accuracy
• High Speed

 


Working Principle

A transmitting unit emits a laser beam that scans at a very high and known speed across the measuring range.

Every object placed in the measuring field interrupts the laser beam and casts its shadow into the receiver.
By measuring the shadow time, the outside diameter of the part can be exactly computed.

In addition to the diameter measurement, by checking other combinations of light / shadow segments, it is possible to measure any other dimension related to the shadow cast by the part.

Signal processing electronics convert time into diameter and dedicated software packages provide additional features like:

  • diameter display,
  • tolerance checking,
  • part sorting,
  • machine feed-back and process control,
  • statistical analysis and reporting,
  • computer interface

What is an Intelligent Laser Sensor?

ils13 pcAn Intelligent Laser Sensor is a Laser Gauge with built in microprocessor electronics, to process the optical signal in order to get the diameter value without using any additional external electronic unit. All measured data are transmitted in a digital format to external units such as a PC, NC or PLC through a standard RS232/RS485/Ethernet serial line.
The basic sensor software installed into the sensor computes the diameter (or the other dimensions selected) and provides data transmission.
More specific functions, such as machine feed-back, tolerance check or statistical analysis are performed by the User’ s external Electronic Unit equipped with a serial interface and suitable communication driver written by the user. Due to their specific features, the Intelligent Laser Sensors are an ideal component for Machine Manufacturers or O.E.M. (Original Equipment Manufacturer) Customers.

 

The Dedicated Measuring and Control Systems

sistemaIn addition to computing and transmitting the diameter (or any other measurable dimension), the software installed into the sensor can perform more complex functions required by the specific application. Dedicated software displays the diameter, checks the tolerance status and sorts any out of specification part, provides automatic machine regulation, prints statistical reports for Process Control and Quality Certification,
allows the interfacing to external computers and, generally speaking, provides any other performance that is required by the specific application.To provide a suitable interface to the user and to the machine, the intelligent laser sensor can be connected to some external units made by Aeroel, like a Display Module or Operator Interface Panel, etc.

These units have no local “intelligence” and are connected to the sensor through the RS485 serial line: the application software loaded into the sensor drives the external units and sets the overall system functions and performance.

The application software installed into the sensor can be modified / replaced by loading a new package through the Ethernet line: in this way it is possible to guarantee the software correction / up-grading and the remote service

Laser Gauge, Electronic Control Unit and Application Software combine together to build a Dedicated Laser Measuring System, which is suitable to perform complex measuring and control tasks.

How Does It Works?

The AEROEL laser gauges series XLS use a visible Laser Diode as a high intensity, monochromatic light source: a thin beam of this light is then collimated onto the object to be measured. The laser beam is deflected at constant speed by a turning mirror positioned at the focus of a transmitting lens, so as to obtain a parallel-moving scanning beam in the measuring field. During the scanning period, the laser beam intercepts the object being measured and casts its shadow onto the receiver.

The duration of the shadow is proportional to the transversal dimension of the measured object, while the duration of the light is related to the object position in the measuring field. Inside the receiver a lens gathers all the light from the transmitter and concentrates it on a high-speed photo diode. The photodiode signal, after suitable manipulation, is processed by the microprocessor which calculates the edge detection times and takes the measurement of the diameter and the position. Other measurements that are determined by edge detection can also be measured with great precision and in fractions of a second: in whichever case where the edges of one or more shades can represent the dimension to be measured, laser gauges are the ideal solution to the problem of control.

In practice, the instrument consists of a transmitter that contains the laser diode and the optical/mechanical scanning system and a receiver fitted with the detection photodiode and the electronics to process the optical signal. The electronic system inside the gauge consists of 4 boards that are common to all Aeroel gauges (Unica system)

 

schemaBoard 1: supply unit

Board 2: motor and diode laser driver

Board 3
: video signal processing and edge detecting

Board 4
: CPU and communications

 


At board 3 output there are binary signals (impulses) which when transmitted to an Aeroel CE-10 or IBU electronic unit allow the piece diameter and position to be calculated. In this case the signals are processed by the microprocessor in the external electronic unit -: the XLS gauges are thereby compatible with the previous generation ALS gauges to all effects. The signal processing methods and performance of the gauge are determined by the external unit’s EPROM resident software.

Board 4, fitted with its own Flash memory resident software and reprogrammable externally, allows internal processing of the measurements and use of the gauge as a real intelligent sensor : the results of the measurements are transmitted externally by means of Ethernet / Rs232 / Rs485 communication lines. The measurement type and method and the communication protocols essentially depend on the software installed in the gauge and are described in the software manual.

DUAL AXIS WORKING DIAGRAM


Logo UeLogo MinisteroFriuli venezia GiluliaFonfo SviluppoProgetto cofinanziato con il Fondo Europeo di Sviluppo Regionale del Programma Operativo Regionale del Friuli Venezia Giulia Obiettivo "Competitività Regionale e Occupazione" programmazione 2007/2013