measurements
Non-contact measurement with light
Here you can see the measured variables that we can record with our sensors.
We as ASTECH GmbH offer sensors, measuring systems and system solutions for numerous industrial measuring tasks.
Distance (LDM)
Description: By means of laser radiation and special measuring procedures the laser distance sensors of the LDM series are capable of measuring the distance between themselves and almost any natural surface. Depending on the deployed type they can reach distances of up to 300 m with a precision down to the millimetre and achieve measuring frequencies of up to 30 kHz. The devices of the LDM series use harmless laser radiation in the visible (red, 650nm, laser class 2) or invisible (infrared, 935nm, laser class 1) range of the spectrum.
Applications:
Distance measurement onto ship bodies in harbours Cement storage Collision avoidance Length measurement of steel billets Position and presence detection of steel coils in rolling mills Position detection of coil along the reel in winding machines Drill hole measurement Title of example application
Presence (CR)
Description: The presence and the correct position of assembly parts can often be assessed by the resulting color effect, as it usually depends on the distance and the angle.
Presence (LDM)
Description: The LDMs use the measured distance to detect the presence of an object within a specific, programmable measuring range independently. All laser distance sensor have one or two freely-programmable digital switching outputs to signal the results.
Quantity (CR)
Description: Color marks and colored objects can be detected by using a color sensor. The industry-suitable evaluation modules determine the quantity and can use multipliers to convert it, for example, into a length. ASTECH offers the complete one-source system.
Applications:
Acceleration (VLM)
Description: The measuring device VLM records the surface velocity of the measuring object optically and contact-free from the distance. This takes place independently from its color, brightness or surface structure. Due to the measuring principle the device works slip-free and records high accelerations, too.
Applications:
Width (LDM)
Description: Broad objects can be geometrically measured with the laser distance sensors of the LDM series. Mostly, two devices are arranged opposed to one another, thus determining the distance to the measuring object between them. From the measured distances and the known distance between the sensors it is possible to calculate variables such as length, width, thickness or diameter. This is mainly executed in a superior control or calculator units. Widths, lengths and thicknesses can then be used for calculating volume or surface.
Thickness (LDM)
Description: If several laser distance sensors are appropriately arranged above and below the material, the recorded distance values can be used to determine the thickness profile of strip material. In such cases, the use of devices with a PROFIBUS interface is especially convenient, as all devices can easily be connected with a superior control, where the thickness profile is calculated by using the measured distance values and the known positions of the measuring devices.
Diameter (LDM)
Description: Broad objects can be geometrically measured with the laser distance sensors of the LDM series. In order to measure the diameter of a roll, only the distance to the axis needs to be known. Via the programmable offset and the scaling factor the measuring device is parameterized in a way that the diameter is directly output.
Applications:
Color (CR)
Description: CROMLAVIEW color sensors are based on the three-range procedure and they process colors according to human perception. Color-sensitive filters, which emulate the tristimulus function of the human eye, facilitate the correct recognition of color values. In terms of color information, opaque solid objects can be evaluated in the epi-illumination method, transparent liquids in the transmitted light method and self-luminous objects in the active mode.
Applications:
Abrasion measurement (Research and development) Coating inspection (black on black recognition) Coating inspection (Clear coat detection) Coating inspection of foam material (Conveyor belt) Egg yolk color classification (Laboratory) Color inspection Color inspection Color inspection Color mark detection Color measurement of salmon meat PET preform inspection
Fill level (LDM)
Description: The detection of the fill level of solid materials in silos can easily be realised with the devices of the LDM series. Mounted at the top of the silo the distance sensor measures the distance to the angle of repose of the poured-in material permanently. Signaling of the fill level is executed via the freely-programmable analog output. At the same time, reaching the limit values "Full" and "Empty" can be realised via the digital switching outputs which can also be adjusted.
Applications:
Velocity 1 (LDM)
Description: With the laser distance sensor LDM301A a special measuring modus is available, in which the velocity of the measured objects is calculated based on the change of the recorded distance values.
Applications:
Velocity 2 (LDM)
Description: With the PC software LDMSpeed the laser distance sensor LDM41A can be used for the measurement of the velocity of individual objects. The ability to measure extremely slow movements contactless is especially advantageous.
Applications:
Velocity of object surfaces (VLM)
Description: The measuring device VLM records the surface velocity of the measuring object optically and contact-free from the distance. This takes place independently from its color, brightness or surface structure. Due to the measuring principle the device works slip-free and records high accelerations, too.
Position detection (CR)
Description: The position of an object with different surfaces can be detected with a dual-channel differential color sensor. The position can be detected on the basis of the sign of the color difference between the two surfaces of the object.
Applications:
Length (LDM)
Description: Broad objects can be geometrically measured with the laser distance sensors of the LDM series. Usually two devices are arranged opposed to one another, thus determining the distance to the measuring object between them. From the measured distances and the previously known distance between the sensors it is possible to calculate variables such as length, width, thickness or diameter. This is mainly executed in a superior control or calculator units. Widths, lengths and thicknesses can then be used for calculating volume or surface.
Length (VLM)
Description: The measuring device VLM records the surface velocity of the measuring object optically and contact-free from the distance. This takes place independently from its color, brightness or surface structure. Due to the measuring principle the device works slip-free and records high accelerations, too. The length of the object is calculated from the measured object velocity and the measuring time. It is possible to determine endless lengths and the length of individual objects.
Position (CR)
Description: The position of print marks and printed images is detected by using CROMLAVIEW high velocity color sensors in the sub millimeter range with high track speeds. They can for example be used for register controls.
Position (VLM)
Description: The measuring device VLM records the surface velocity of the measuring object optically and contact-free from the distance. The length of the object is calculated from the measured object velocity and the measuring time. This facilitates the determination of the position of a passing object.
Position (LDM)
Description: Measuring devices of the LDM series can be used for the detection of the position of large objects, such as machines or vehicles. They can measure the distance between themselves and almost any natural surface contactless. The programmable offset of the distance measurement can then be used to shift the zero point and to indicate the vertical movement directly. Parameterization with an appropriate scaling factor facilitates direct output in a predetermined unit (m, feet, yards)
Degree of stretching and Skin pass level (VLM)
Description: The measuring device VLM records the surface velocity of the measuring object optically and contact-free from the distance. This takes place independently from its color, brightness or surface structure. The measuring principle of the device allows for slip-free operation and records high accelerations, too. Due to the high precision of measurements several sensors can be used to detect slight differential velocity, such as the degree of stretching and skin pass level.
Applications:
Impact energy (VLM)
Description: The measuring device VLM records the surface velocity of the measuring object optically and contact-free from the distance. This takes place independently from its color, brightness or surface structure. The measuring principle of the device allows for slip-free operation and records high accelerations, too. The mass and velocity of an object are used to determine its kinetic energy.
Applications:
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