Gap analysis in axial piston pumps
So far, gap measurements inside the pumps were not possible because of the extreme requirements. The sensors must be resistant to high speeds, high pressures up to 1,000 bar and temperatures above 100 °C. Furthermore, the pumps are extremely compact, which significantly limits the space available for integration of sensors. Thanks to the extremely small sensor designs and their high pressure and temperature stability, the eddyNCDT inductive miniature sensors are ideal for this application. The eddyNCDT 3300 eddy current measuring system, which is one of the most powerful systems in the world, is therefore used on the test rig for evaluating the pumps. |
Monitoring free-standing structures
High, free-standing structures such as cranes are monitored using inclination sensors which provide early warnings of a possible tip over in order to avoid accidents. |
Wear measurement in the bearing
In modern marine diesel engines, the crankshaft bearing is subject to regular maintenance intervals. For predictive maintenance, inductive sensors (eddy current sensors) are used to permanently monitor the bearing wear. Despite harsh ambient conditions such as high temperatures, lubricants and pressures, the sensors measure the bearing movement reliably in long-term use. |
Piston position in the hydraulic cylinder
In modern hydraulic cylinders, the piston position is detected continuously. Therefore, inductive long-stroke sensors from Micro-Epsilon are used which are directly integrated in the hydraulic cylinder. Its robust design enables the sensor to provide stable measurement values despite pressure and oil. |
Position detection of the piston in the hydraulic cylinder
In order to detect the piston position of hydraulic cylinders, magnetostrictive and inductive sensors are directly integrated in the sensor. Therefore, the magneto-inductive sensor mainSENSOR is an alternative. The face-mounted magnet transfers its magnetic field to the piston rod. The sensor mounted outside then detects the magnetic field distribution along the rod and converts this into a linear output signal, which corresponds to the piston position. |
Position detection of the piston in the hydraulic cylinder
In agricultural machines, acceleration sensors monitor the mower in order to recognize collisions. When colliding with a stone, the mower will experience a movement that is detected by the acceleration sensors. When the mower is immediately switched off, damages can be reduced or avoided.
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Jib lengths of mobile cranes
The current jib length is important when calculating the torque of the load on the crane. This length is measured with an integrated draw-wire sensor. This simple and telescopic measuring principle makes wire sensors predestined for the task. The sensors can also be retrofitted.
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Precision synchronized lifting system
Synchronized lifting systems enable the raising and lowering of heavy loads controlled for distance and force or the controlled forward feed of large components. To achieve this, eight or more cylinders are connected to a central high pressure hydraulic system (700 bar). The travel displacement of each individual cylinder must be measured as the actual value for the synchronized movement and supplied to the closed/open loop controller. Draw-wire displacement sensors of the wireSENSOR Series P60 are employed for this task.
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Displacement measurement on slag transporter
Draw-wire sensors are used to reduce the standstill time of slag transporters during the loading and unloading. They are installed on the tipping cylinder and the support cylinder. In this way, the signal of a limit switch no longer has to be waited for. Depending on the load state, the transporter can start the journey earlier. The sensor also withstands this demanding environment using a special case and wire extensions.
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Lift height of a catering vehicle
Catering vehicles play an important role in passenger air traffic. They are responsible for there being enough foodstuffs on board. It is especially difficult with the Airbus A380 to reach the loading hatch with the vehicle. Therefore, the load area of the scissor platform is also maneuverable. Draw-wire sensors are perfectly suitable for measuring this displacement.
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