CZS-3600 material magnetostriction measuring instrument
Key words: Magnetostriction, energy conversion efficiency K33, quantity magnetostriction coefficient (λ)
Magnetostriction (Magnetostriction) effect refers to the phenomenon that when an object is magnetized in a magnetic field, it will stretch or shorten in the direction of magnetization. The magnetostrictive effect can be described by the magnetostrictive coefficient (or strain) λ, λ= (LH-L0) /L0, where L0 is the original length and LH is the length of the substance after it is extended (or shortened) under the action of an external magnetic field. Generally, the λ of ferromagnetic substances is very small, about one part in a million. There are three main categories of magnetostrictive materials: the first category is magnetostrictive metals and alloys, such as nickel-based alloys and iron-based alloys; The second type is ferrite
magnetostrictive materials such as Ni-Co and Ni-Co-Cu ferrite materials. These two kinds of materials are called transmission magnetic extension materials, and their λ values (between 20 and 80ppm); The third category is rare earth intermetallic compound magnetostrictive materials, such as TbDy-Fe material Tbo0.3Dy0.7Fe1.95 alloy material λ reached 1500~2000ppm, than the first two types of materials λ 1~2 orders of magnitude larger. Rare earth giant magnetostrictive materials have large magnetostrictive strain λ. High energy conversion efficiency (expressed by electromechanical coupling coefficient K33); Its elastic modulus varies with the magnetic field and can be regulated. Short response time; Good frequency characteristics, wide working frequency band; Good stability, high reliability, no fatigue, no overheating failure problems. Magnetostrictive materials have wide application prospects in sonar hydroacoustic transducer technology, electroacoustic transducer technology, ocean exploration and development technology, micro-displacement drive, vibration reduction and anti-vibration, noise reduction and anti-noise system, intelligent wing, robot, automation technology, fuel injection technology, valves, pumps, wave oil recovery and other high-tech fields.
This instrument is specially designed for measuring the magnetostrictive properties of materials, not only measuring the magnetostrictive coefficient (λ), but also measuring the dynamic magnetostrictive coefficient (D33) and the magnetoelectromechanical coupling coefficient (K33).
Technical parameters:
1. Variation range of magnetic field strength:
Standard type: 0~0.2T, the highest stepping accuracy is 0.01Oe.
Enhanced type: 0~2.0T, the highest stepping accuracy is 1.0Oe.
2. Measurement range of magnetostriction coefficient: 1με~104με.
3. The highest sensitivity of the measurement of the strictive coefficient (the minimum interval of the data can be resolved) : better than 0.1με.
4. Measurement accuracy of dynamic magnetostriction coefficient: 2.5%; Modulating magnetic field: 1~10 Oe; Frequency 100Hz~5kHz.
5. Measurement accuracy of magnetoelectromechanical coupling coefficient: 2.5%; Frequency range: 100Hz~102kHz.
6. Magnetic field measurement: 1Oe~30000 Oe; Maximum accuracy: 0.3% (@ probe temperature 25±20℃, 0~5000Oe).
7. Relative accuracy: better than ±1%; Repeatability is better than ±1%.
8.Sample pressure range: 0~30MPa 9.Instrument and computer interface: USB2.0/RS485/RS232.
10. Data acquisition and control software functions:
A. Running windows 7;
B. Software setting all measurement and control parameters of the instrument (such as measurement mode; Range, sensitivity, amplitude of scanning magnetic field and data sampling interval, etc., automatically saved when the instrument measurement status software exits);
C. Real-time display of collected data and curves during measurement;
D. The measurement results can be saved as data files for Origin and other data processing software to call and process, and can also be saved and printed on the computer screen to display the result interface;
E. With data smoothing, derivative, curve correction and other data processing functions;