Distance measurement can be done with contact and non-contact technologies.
Contact technologies are mainly used for measuring small distances and small displacements and high precision
Non-contact measurements, predominantly based on LASER technology, is a reliable and consolidated technique for measuring small, medium and large distances and above all on moving objects, easily deformed or at high temperatures.
The advantage of non-contact measurement is that you can also measure moving or easily deformed objects. Furthermore, the non-contact distance measurement allows the detection of movements or positions of objects at great distances or located in areas that are difficult to reach.
There are many families of products designed for distance measurement and almost all have characteristics of connection with data acquisition systems and process control.
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Product families for distance measurement
Industrial LASER distance meters
Industrial laser distance meters are instruments used to measure theremote and contactless movement in industrial environments or in the field of geological monitoring.
These devices use a beam of laser light to measure the distance between two points accurately and reliably, with an accuracy of up to tenths of a millimetre.
One of the most important features of industrial laser distance meters is theirs ability to work in long range and in difficult environmental conditions.
Thanks to their precision, these instruments can be used in a wide range of applications, including those that require extremely accurate measurement, such as civil engineering, quality control and industrial manufacturing.
Linear transducers
Il linear displacement transducer it is a device used to measure small displacements, usually less than one metre, and very often with very high precision and resolution.
The linear transducers have high precision and repeatability even in harsh working conditions and in the presence of contaminants.
Linear position transducers are robust and reliable, created specifically for the industrial sector, they ensure a long operational life. They offer measuring ranges from 0,2mm to 10mm in high accuracy versions and up to 300-1000mm in standard accuracy versions.
Economical, miniaturized, pressurized, spring-loaded, with or without built-in electronics versions are available. All linear transducers can be connected to amplifiers with analogue, RS232, USB or fieldbus outputs.
Comparators
The comparator is a measuring instrument used for measurements of linear displacement, oscillations, straightness, form errors, positions and in some cases vibrations.
The comparator uses a linear transducer, integrated in the measuring instrument, and a display to indicate the displacement of the rod. The end of the rod, called the probe, is in contact with the surface of the object being measured.
The type of probe can be chosen based on the use and shape of the contact point. Point, ball, plate, chisel or rolling bearing probes are available.
The comparators offered by INNOVACHECK are made with miniaturized indicators and with very low consumption, so much so that they can be easily powered by a common button cell battery. The comparator displays are normally made with a resolution of 0,01 mm (hundredths), 0,001 mm (thousandths). Some special models of comparators can also reach sub-micron resolutions.
Triangulation LASER sensors
Triangulation laser sensors are non-contact measuring instruments widely used in various industries. These sensors adopt triangulation technology for measure the distance between the sensor and the object surface, thus allowing to obtain with high precision the measurements of displacements required by the production processes.
La triangulation technology it is based on the emission of a laser beam which is projected onto the object surface and reflected towards the sensor.
Laser triangulation sensors offer many advantages over traditional measuring instruments. First, they allow you to make non-contact measurements, which means that there is no risk of damaging the object surface that is being measured. Also you can measure moving or easily deformed objects. Furthermore, the triangulation laser sensors are particularly precise and they can detect even small displacements with an accuracy of a few microns.
Technical insight
Distance measurement is a key element in industrial applications.
Laser measuring sensors, laser distance meters, optical sensors and linear transducers are indispensable tools for distance measurement in an industrial environment.
Thanks to their precision and their ability to detect even the slightest changes in the position of the objects, they guarantee maximum efficiency in processing and operator safety. Furthermore, thanks to the technical documentation provided by the manufacturers, it is possible to select the best solution for the specific needs of the application in which they are to be used.
Distance measurements in the railway sector
In particular, in railway field, it is essential to know the distance between the train and the object that is on the railway line, such as the control signal.
To make this possible, laser measuring sensors are used which allow the distance between the train and the signal to be evaluated simply and effectively.
Thanks to their precision, laser sensors can also be used to monitor the position of trains inside railway depots.
Distance measurements in the metallurgical sector
In the metallurgical field, distance measurement is essential to ensure production safety and the quality of the finished product.
Laser distance meters are used to check the distance between the parts that make up industrial machines, ensuring precision machining and correct assembly of the components.
Furthermore, these sensors can also be used to measure the width of bands of steel or other materials, ensuring the correct size of the production.
Distance measurements in the heavy construction sector
In the heavy construction sector, distance measurement is essential to ensure operator safety and to assess the size of the construction site. x
The range of laser sensors offers a wide choice of solutions capable of measuring the distance, height and speed of objects.
Furthermore, these sensors can also be used in the design phase, allowing you to create accurate 3D models representing the construction site that contain information about the distance, location and shape of the various elements.
Distance measurements on construction sites
On construction sites, distance measurement is essential for ensuring the accuracy of constructions and for installing components. Laser measurement sensors make it possible to determine the length of beams or pillars before their installation, ensuring greater efficiency in processing and reducing the risk of errors.
Furthermore, these sensors can also be used to measure the distance between the walls and ceilings of buildings, allowing information to be obtained on the total area of living spaces.
Distance measurements in the field of environmental monitoring
Environmental monitoring is another field where distance measurement is crucial.
Laser sensors can be used to measure the distance between buildings and mountains or trees, allowing information to be obtained about the distribution of features in the landscape.
Additionally, these sensors can be used to monitor soil solidity by measuring the distance between the soil surface and the foundations of structures. In this way, the risk of landslides or other natural disasters can be prevented.
Distance measurements in the precision mechanics sector
In recent decades, distance measurement in an industrial environment has become increasingly important in the field of precision engineering.
Engineers have the need to monitor, position and precisely control their machinery, and distance sensors can provide them with the required information.
In particular, LVDT (Linear Variable Differential Transformer) linear sensors and transducers are widely used for distance measurement in industrial environments.
This type of sensor works by measuring changes in the length of an iron core within a copper coil. At the same time, a sine wave is applied to the coil, creating a magnetic field which induces an EMF (Electro Motive Force) within the coil.
By measuring the induced voltage, it is possible to determine the position of the nucleus, and therefore the distance between the sensor and the object to be measured. This technology is highly accurate, reliable and robust, making it the ideal choice for many industrial applications.
Among the features offered, there are the possibility to measure the stroke length and absolute position with high precision, the possibility to choose between different interface options, such as analog, digital or fieldbus, and the possibility of carrying out measurements at high speed.
Contacts and advice
For more information or for an application consultancy you can contact:
RODER SRL
Via Aldo Moro 15/A – Oglianico (TO) – Italy
Telephone : +39-0124-34301
Mail: info@roder.it
Systems and integration division website: http://www.roder.it
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