Magnetostrictive sensors take advantage of the efficient coupling. This difference would affect the test results and the identification of defects. Pdf measurement system for a magnetostrictive torque sensor. Since the output is direct, no signal electronic processing is required if interfaced with controllers or measurement instruments.
Temposonics magnetostrictive linear transducers, temposonics magnetostrictive linear transducers are the smart choice for motion control, position feedback and level measurement, examples of magnetostrictive linear transducer applications. Pdf on magnetostrictive transducer applications researchgate. A magnetostrictive material is placed in the core, which works as an actuator when a. The level transmitter is a magnet, which is integrated into the float. It is necessary to study the effect of tensile force on the. Generally unaffected by temperature, the mpxr features a large, buoyant, and robust float making it suitable for. However, they are a very useful tool because they can provide measurements without the need for physical contact. If a magnetostrictive material is magnetized, it strains. Find magnetostrictive sensor related suppliers, manufacturers, products and specifications on globalspec a trusted source of magnetostrictive sensor information.
Joglers lgt6000 series level transmitter is the first magnetostrictive level sensor that is specifically designed for sight glass automation. The upper casing having an approximate bell shape has an upper end that is provided with an opening and a lower end that is provided with a notch. It consists of floater kits, measuring rod and 316l protection tube, probe head and communication cable. The magnetic field sensor 122 detects the magnetic field strength and or changes in the magnetic field strength and or changes in the magnetic field direction. Magnetostrictive transduction is used in sonars, acoustic devices, active vibration, and position control and fuel injection systems. Manufacturers and suppliers of sensors and measuring devices based on magnetostrictive measurement principles magnetostrictive sensor technology.
Review of magnetostrictive patch transducers and applications. Magnetostrictive sensors take advantage of the efficient coupling between the. Posichron easymount magnetostrictive sensors asm en. This technology is very durable and highly accurate. By using a proven draw wire sensor design that has been completely reengineered for reliability and performance from the ground up, cpi removes the difficulties of using a rodtype sensor in long stroke applications where longevity is of paramount concern. The magnetostrictive sensor thus consists of a primary sensor in a region of the shaft which is magnetically coded. In addition to the magnetostrictive waveguide, the tube also houses the optional temperature sensor and the sensing elements.
The development of materials that exhibit strong magnetostrictive effects, such as terfenold that is a giant. Overview of magnetostrictive sensor technology frederick. Magnetostrictive linear position sensor direct replacement cpi. The mpx liquid level sensor is a rugged, precise level sensor built to last for years and withstand harsh, high turbidity environments in hazardous locations. If needed, mts offers different external service tools for modifying sensor parameters inside the active electrical stroke minimum. Magnetostrictive sensors take advantage of the efficient coupling between the elastic and magnetic states of a material to facilitate sensing a quantity of interest. The lgt6000 contains a low profile waveguide that can be mounted internally into wetted or externally against nonwetted on most sight. The magnetostrictive sensor 120 consists of a magnetized region 121 of the shaft 110 and of a magnetic field sensor 122.
The position is detected via the solid extractable driving rod. Magnetostrictive sensor configurations that measure motion, stress or force, torque, magnetic fields and target. Tspdms discriminating magnetostrictive sensor installation manual franklin fueling systems 3760 marsh rd. Magnetic and magnetostrictive theory pertinent to magnetostrictive sensor technology is provided. The first application of the magnetostrictive phenomena was possibly made in a magnetostrictive delay line, and the phenomena have been widely applied in the design of sensors that measure position, mass, field and others. Magnetostrictive transducermagnetostriction,working. Magnetostrictive sensor performance in long stroke hydraulic applications. A thin strip of amorphous magnetic alloy was bonded onto the surface of the shaft, formed into a chevron shape, then the torque applied to the shaft was detected from the difference in the inductance of the detection coil wound around the strip. Its electronics module can be exchanged quickly and easily. Such a device can be used as a sensor and also for actuation as the transducer characteristics is very high due to the bidirectional coupling between mechanical and magnetic states of the material. A magnetostrictive position sensor measures the distance between a position magnet and the head end of the sensing rod. A good example of a magnetostrictive level probe sensor is the flexstem mpxf.
Download pdf info publication number wo2015078724a1. Magnetostrictive type torque sensor 93 a highly sensitive, noncontact torque sensor was developed using amorphous magnetic alloy. The most important application for our btl magnetostrictive linear position sensors in rod design is in hydraulic drive units. Magnetostriction is the change in shape of materials under the influence of an external magnetic field. And due to the special sensor design based on our mts engineers knowhow, the sensor principle operation is unaffected by external influences, e. Magnetostrictive linear position sensor direct replacement. Its unique design, plus a wide range of cursor configurations, ensures easy installation and total compatibility with cylinder manufacturer specifications. Magnetostrictive linear position sensors that withstand possible explosion hazards are also available for zone 2. Magnetostrictive linear position mag100 tsm sensors s. Magnetostrictive linearposition sensors control design.
Please contact mts for specifications that are critical to your needs. Theory of operation a magnetostrictive position sensor measures the distance between. Version matrix lmt magnetostrictive english pdf technical description. The lower casing includes a diskshaped member and a barshaped member that are integral with each other. At the point being measured liquid level there is a cylindrical float with permanent magnets acting as a position transducer, whose field lines run at right angles to the impulse magnetic field. Amsys gmbh located in mainz, germany offers a full line of innovative pressure sensors. A magnetostrictive material is placed in the core, which works as an actuator when a magnetic field is produced by passing a current through the drive coil. Design and application of magnetostrictive ms materials. Magnetostrictive sensor technology and its applications. The variation of materials magnetization due to the applied magnetic field changes the magnetostrictive strain until reaching its saturation value. A highly sensitive, noncontact torque sensor was developed using amorphous magnetic alloy. An advantage of the magnetostrictive sensor, over other types of linear position sensors, is the ability to read the position magnet even when there is a barrier between the position magnet and the sensing rod. The housing for the btljdexcta12 model series is robust and pressureencapsulated. Magnetostriction is a phenomenon only found in ferromagnetic materials such as iron, nickel, cobalt and their alloys.
Posichron position sensors rely on the timeofflight principle for determining positions. In this paper, a general description is first given of the physical principles of the mss. A magnetostrictive load sensor includes an upper casing, a lower casing, a coil, and a bobbin. Magnetostrictive level sensor for harsh environments. Effect of tensile force on magnetostrictive sensors for.
Typical sensors may measure temperature, pressure, flow, force, or position, and the type of measurement and the sensor technology chosen dictates the parameters that drive the specification and the size of the appropriate sensor. All these features are combined into precise mts position sensors which offer high. The sensor circuitry emits pulses of current through the wire, generating a circular magnetic field. The portfolio extends from pressure measurement cells made. The temposonics technology, based on magnetostriction, does not rely on moving parts and is not exposed to mechanical stress. Hightemperature magnetostrictive sensor installation procedure the following is a procedure that was developed during the qualification of the magnetostrictive sensor mss technology for hightemperature applications. Magnetostrictive transducers ch i i magnetostrictive materials transduce or convert magnetic energy characteristics. A timer precisely measures the elapsed time between the generation of the pulse and the return of the acoustic signal. Since the speed of the ultrasonic wave in the waveguide is precisely known, the time required to receive the return signal can be converted into a linear position measurement with both high accuracy and repeatability.
Therefore, we have proposed a new magnetostrictive type torque sensor ieee trans. Thank you for purchasing an mpx series magnetostrictive level sensor from apg. Inside the probe tube there is a rigid wire made of magnetostrictive material. Balluff magnetostrictive linear position sensors have achieved a worldwide reputation for accuracy, stability, and rocksolid reliability. It is also perfectly suited for dual levels, where an interface between to liquids must be measured. Thin film magnetostrictive sensors can sometimes be hard to use, as some signal processing is required to convert the signal into the desired output.
The mpx level sensor provides highly accurate and repeatable level readings in a wide variety of liquid level measurement applications. Magnetostrictive linearposition sensors sizing and applying magnetostrictive linearposition sensors technical paper linearposition sensors all specifications are subject to change. Sens2b does not manufacture or sell any sensors or measuring devices. Pdf download for overview of magnetostrictive sensor technology open. With special advantages such as high stability, highprecision, noncontact measurement, greasy dirt resistance, various output methods, etc. The map magnetostrictive transducers provide a direct voltage or current analog output proportional to the magnetic cursors position. This is a 58 diameter stainless steel probe, sealed on one end, with the magnetostrictive waveguide in its center. This involves the sensor sending an electromagnetic impulse through a magnetostrictive waveguide, which is reflected as a mechanicalelastic density wave by a movable position magnet. Existing and potential applications for magnetostrictive sensors are numerous because the newer magnetostrictive materials, fabricated both in crystalline and amorphous form, can. Xt200 series magnetostrictive level probe can accurately measure the product level, water level and temperature of tank, and transmit data to console in real time. Nonlinear magnetostrictive transducer comsol multiphysics. The transducer has a steel housing enclosing a drive coil. Joglers lgt6000 series level transmitter is the first magnetostrictive level sensor that is specifically designed for sight. Dec 11, 2009 typical sensors may measure temperature, pressure, flow, force, or position, and the type of measurement and the sensor technology chosen dictates the parameters that drive the specification and the size of the appropriate sensor.
Core part of the new concept is a strong position magnet mounted inside the hydraulic cylinder. A return signal is generated from the precise location where the magnetic field of a float intersects the wire. A lowenergy pulse, generated by the jupiter electronics, travels the length of the magnetostrictive wire. Design and application of magnetostrictive ms materials a. Magnetostrictive sensor used for model development and experimental veri. Abb brings the next generation magnetostrictive level transmitter to make measurement easy for customers. As sensors become integrated in more applications, interest in magnetostrictive sensor technology has blossomed. Level detection multiple sensor manufacturer supplier. Each cycle occurs ten times per second, providing real. Jupiter models are designed to attach quickly and easily, via standard clamps, to atlas and gemini magnetic level indicators or can be directly inserted into a wide variety of process vessels. Mag100 is a magnetostrictive position transducer designed for use with hydraulic cylinders in mobile application. The absolute, linear position sensors provided by mts sensors rely on the companys proprietary temposonics magnetostrictive technology, which can determine position with a high level of precision and robustness.
Please take a few minutes to familiarize yourself with your mpx and this manual. Magnetostrictive probes and level sensors xtsensors. The shaft can be made of ferromagnetic material for the pcme process, which provides a good basis for a pcme sensor. Magnetostrictive type torque sensor sae international. The magnetostrictive sensor is gaining widespread use because of its innate accuracy, reliability, and ability to. Discriminating magnetostrictive sensor installation manual. A thin strip of amorphous magnetic alloy was bonded onto the surface of the shaft, formed into a chevron shape, then the torque applied to the shaft was detected from the difference in the inductance of the. Abb are manufacturers and suppliers of level detection instruments that use multiple sensor technology for the measurement of liquid level and interface. Overview of magnetostrictive sensor technology smart materials. May 22, 2018 magnetostrictive sensors rely on the weidemann effect to measure position or velocity. The er sensor has an aluminum cylinder with a guided driving rod which contains both the sensor element and the electronics. Nov 21, 2017 in the coming era of the internet of things iot, wireless sensor networks that monitor, detect, and gather data will play a crucial role in advancements in public safety, human healthcare, indust. Grunwald dublin city university, school of mechanical and manufacturing engineering, glasnevin, dublin 9, ireland, email.
Magnetostrictive sensors rely on the weidemann effect to measure position or velocity. Conversely, if an external force produce a strain in a magnetostrictive material thean external force produce a strain in a magnetostrictive material, the. The sensor is insensitive to dirt, oil, water and mechanical shock loads and has a very high measuring accuracy. Pdf this paper provides an overview of magnetostrictive transducer technology. Unlike other technologies that rely on frequencies traveling through the air, the magnetostrictive probe is not as sensitive to such variables as temperature, humidity, and the like. High temperature magnetostrictive sensor installation. Download limit exceeded you have exceeded your daily download allowance. Wo2015078724a1 magnetostrictive sensor for actuators in. These instructions cover bonding of the mss strips to a pipe, but not installation of wire coils over the strips. Magnetostrictive sensors magnetostrictive measurement.
The magnetostrictive sensor mss is a type of transducer which can generate and detect timevarying stresses or strains in ferromagnetic materials. Based on the principle expressed by equations 5 and 6, it is possible to measure the magnetic flux density in a magnetic circuit by the voltage induced in a flux. When a wire is subjected to a magnetic field oriented parallel to its length, and a current is passed through the wire, the wire experiences torsional strain at the location where the magnetic field occurs. This a 58 diameter stainless steel probe, sealed on one end, with the magnetostrictive waveguide in its center. When the longitudinal mode guided waves based on magnetostrictive effect were employed to inspect the bridge cables, we found that there was a large difference in the signals amplitude of the same specification cable under different tensile force. They are exceptionally wellsuited for use in hydraulic cylinders for position feedback, for molding and rolling mills, or for elevator and hoisting technology. Magnetostrictive transducermagnetostriction,working principle,diagram,magnetostrictive effect,magnetostrictive actuators,sensors,applications. Magnetic and magnetostrictive theory pertinent to magnetostrictive sensor.
Overview of magnetostrictive sensor technology frederick t. The sensor itself originates from the magnetostrictive, noncontact and wearfree posichron sensor line. In addition to the magnetostrictive waveguide, the tube also houses the optional temperature sensor and the detector electronics. Effect of tensile force on magnetostrictive sensors for generating. Aug 01, 2011 magnetostriction transducers a magnetostriction transducer is a device that is used to convert mechanical energy into magnetic energy and vice versa. It is therefore extremely accurate, with a resolution of only a few millimeters. Sp400 flexible type magnetostrictive liquid level sensor request price pdf download magnetostrictive probe is mainly composed of electric house, temperature sensors, protection steel pipe, magnetostrictive waveguide wire and floaters with magnet inside. This current produces a circular magnetic field along a wire made of magnetostrictive material, which is held under tension inside the sensor tube. The jupiter magnetostrictive level transmitter provides a 420 ma output, proportional to the level being measured. Mpx magnetostrictive level sensors user manual for the mpxe, mpxr, and mpxg.