Linear Position Sensor
Linear Position Sensor Application Notes. Would you like to discuss an application? Call us today 856-727-0250
Most snow plows utilize hydraulic actuators to raise and lower the plow blade, change the blade’s left-to-right surface contact angle, and adjust the plow blade’s front-to-back tilt angle. Typically, these plow positioning functions are under the plow operator’s control. However, the operator’s productivity can be improved and plow maintenance reduced if plow position feedback is made available to the operator in the vehicle’s cab. A further benefit to plow fleet operators is that the position sensors’ output could be transmitted along with the GPS location of the plow vehicles to a remote site, where the plow operating parameters can be logged and evaluated for productivity and maintenance analysis. In addition, there can be electronic systems on board the plow vehicle that utilize various sensors to evaluate snow pack compaction and related factors to automatically control the most important plow position parameters.
There has been a revolution in the position sensor market with the development of low cost, high precision, inductive LVIT Technology developed by H. G. Schaevitz LLC dba Alliance Sensors Group in Moorestown, NJ.
LVIT Technology (Linear Variable Inductive Transducer) has significant advantages over LVDTs and Potentiometers having an excellent stroke-to-length ratio and using contactless, inductive technology; giving you best of all worlds at a cost-effective price. The LRS-18 series are designed for dimension or position measuring applications in factory automation and in various industrial and commercial applications such as automotive testing, mil/aero test stands, robotic arms, and packaging equipment.
Alliance Sensors Group, a division of H.G. Schaevitz, LLC, has developed a linear position sensing technology called LVIT that offers an excellent price-to-performance ratio compared to other linear position sensing technologies such as LVDTs, linear potentiometers, and magnetostrictive devices. Furthermore, LVITs can offer the best stroke-to-length ratio of any contactless linear position sensor, because their overall length only increases by a relatively small percentage beyond their stroke.
Mechanical installation: An ASG ME-7 in-cylinder position sensors is embedded into a 48 mm diameter
cavity in the rear endcap of a hydraulic cylinder. It may be inserted from the front of an unassembled
cylinder or from the rear of a cylinder with a two-piece endcap with a separate end cover.
Mechanical installation: MR-7 in-cylinder position sensors are designed to be inserted into an o-ring port machined into the rear endcap of the hydraulic cylinder. Standard MR-7s use an SAE J1926-1 -8 port with a 3/4-16 UNF thread. Metric threaded versions use an ISO 1649-1 port with a M18 x 1.5 thread. Both ports are Illustrated below. For either size port, the sensor's male thread comes with a Viton o-ring installed.
SAE J1926-1 -8 Port
Recommendations for DC power supplies and USB-based data acquisition hardware for use with ASG's signal conditioners and DC-operated sensors
DC Power Supplies
There are two distinct types of DC power supplies that convert the AC power line voltage into
An ongoing challenge in the USA is that our transportation infrastructure is aging, as attested to by the increasing traffic and the resulting load limits being placed on bridges. In the present technological world, bridge monitoring does not have to rely on periodic human inspections, but could rely instead on electronically monitoring a bridge’s health, so it can be maintained and repaired well before any structural integrity problem could develop.
Bridge expansion and contraction due to seasonal heating and cooling is a common problem found in civil engineering. To combat this problem, engineers put expansion joints in the bridge to absorb these changes. This problem is compounded with railway bridges, where the expansion of a mile long section of rail could be as much as 4 ft over a temperature change in some climates of 100 degrees F. This could lead to rail buckling, known in the industry as “sun kink”, as shown below, and the derailment of a train.
ME Series Linear Position Sensor Installed in a Hydraulic Cylinder
Alliance Sensors Group offers in-cylinder position sensors to replace magnetostrictive technology at a lower installed and ownership costs. The LVIT ME series embedded sensor is placed in the same location as the other technologies as shown above. The sensor uses the gun drilled hole in the rod and piston assembly as the target. Typically a 10mm dia. hole is drilled but other sizes can be sensed. The unit is provided with a cable outlet for the electrical connections.
Alliance Sensors' LVIT Linear Position Sensors offer SenSet™ Field Programmability. SenSet™ allows the installer to very simply and quickly exactly match the full scale electrical output of a sensor to the actual mechanical movement range of the device in which the sensor is installed
An established but disruptive technology is now displacing older technologies being used for in-cylinder hydraulic actuator position feedback. LVIT Technology™ is an inductive technology which has been replacing both magnetostrictive sensors that use time-of-flight measurement technology and resistive potentiometers to offer a very rugged sensor that does not wear out.
Our Technical Support Staff: We have more than 150 years and three generations in the position sensor business and are expert application engineers at what we sell. We have real world experience and know how to solve your measurement challenges. Need help technical help with your measurement application? Call us today 856-727-0250.
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