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Testing Principle and Classification of Flux Meter
Release time:
2019-09-15
Source:
Www.fe2100.com
A fluxmeter is a magnetic measuring instrument that measures magnetic flux (quantity). It is used for the measurement of space magnetic field and the magnetic study of materials. The fluxmeter is a magnetic field measuring instrument that determines the magnetic flux according to the degree of deflection of the movable frame when the magnetic flux changes in the measurement coil. The fluxmeter is a magnetic field measuring instrument that determines the magnetic flux according to the degree of deflection of the movable frame when the magnetic flux changes in the measurement coil.
magnetic flux meterIt is a magnetic measuring instrument that measures magnetic flux (quantity). It is used for the measurement of space magnetic field and the magnetic study of materials. The fluxmeter is a magnetic field measuring instrument that determines the magnetic flux according to the degree of deflection of the movable frame when the magnetic flux changes in the measurement coil. The fluxmeter is a magnetic field measuring instrument that determines the magnetic flux according to the degree of deflection of the movable frame when the magnetic flux changes in the measurement coil. In the closed loop formed by the measuring coil and the movable frame winding of the fluxmeter, when the magnetic flux Φ in the measuring coil changes, an induced current passes through the frame winding, causing the frame to produce a certain bias α,Φ and α are proportional, the magnetic flux (Wb) is Φ =(cα/N)× 10-3, where c is the impact coefficient of the fluxmeter, mWb/lattice, standard fluxmeter, c = 1;N is the number of turns of the measuring coil. The magnetic flux is related to the product of the magnetic field strength h at the location and the average cross-sectional area s of the measuring coil, so the magnetic field strength H = φ/S = (cα/NS)× 10-3
The magnetic flux is measured directly, and the magnetic field strength is calculated.
magnetic flux meterCalibration is required before use to ensure the accuracy of the measurement. Flux meter is made by using the principle of electronic integration, digital display of the measured magnetic flux size of the instrument, it can detect magnetic materials, not only can measure the magnetic flux value can also be directly detected on the performance of magnetic products, so as to achieve the purpose of controlling product quality, magnetic flux meter has a peak hold function, can be quantitative acquisition of instantaneous pulse magnetic field, which can detect the size of pulse magnetic field. The commonly used magnetic flux meter has magnetoelectric magnetic flux meter, electronic magnetic flux meter, digital integral magnetic flux meter.
magnetoelectric type
magnetic flux meter
A magnetoelectric system galvanometer without opposing moments. The pointer driven by the movable part can stay at any position on the scale and work in an extremely over-damping state. When in use, the moving coil is connected with an external magnetic flux detection coil. When the magnetic flux linked by the detection coil changes, the induced electromotive force is generated in the coil, which makes
magnetic flux meterThe pointer is deflected from the original position α1 to the new position α2, and the difference between the two positions (Δα = α2 − α1) is proportional to the time integral of the induced electromotive force, and thus to the change in magnetic flux Δφ. The magnetoelectric magnetometer is divided by milliweber, also known as milliweber meter. It is equipped with an adjustment mechanism, which can adjust the pointer to zero point or other convenient reading position before reading. But its sensitivity is low, only 0.1 milliweber/division. If higher sensitivity is required, an impact galvanometer or an electronic, digital integral fluxmeter must be used.
electronic magnetic flux meter
It is composed of electronic integrator and indicating instrument. The integrator is composed of an integrated amplifier and a resistance-capacitance feedback; the indicator meter can be a mechanical indicator meter or a digital voltmeter. When the magnetic flux linked in the detection coil changes Δφ, electromotive force e is induced in the coil. at this time, the output voltage e0 of the integrator =-nΔφ/RC(n is the number of turns of the detection coil, r is the resistance, and c is the integral capacitor), and the change amount of the magnetic flux linked with the detection coil can be read from the indicator meter. The sensitivity of the electronic fluxmeter in the 1980 s can reach about 10-3 milliWeber/division, which is much higher than that of the magnetoelectric fluxmeter, but still lower than that of the impact galvanometer.
digital integral flux meter
It consists of a voltage-frequency converter and a counter. The voltage e induced by the flux change Δφ in the detection coil is converted by the voltage-frequency converter into a pulse train whose repetition frequency is proportional to the value of e at different times. The counter makes a total count of the pulse chain, and the total count N is proportional to Δφ, so as to obtain the change of the magnetic flux.
Hunan Yongyi Technology Co., Ltd.Development of production
FE-201 flux meterand
FE-210B flux meterIt is a professional magnetic measuring instrument. Based on the simple and practical design concept, we are committed to designing magnetic measurement products with convenient operation and practical functions for users. The instrument is designed with strong practical functions such as polarity judgment. Digital fluxmeter is a magnetic measuring instrument designed and produced by using low drift electronic integration devices. Complete test response, no loss of data during the test, high test accuracy, and small drift are the main features of this instrument. In the process of using the pull method to test the magnetic flux of the sample, the fast pull and slow pull data can be consistent, repeated measurement and recovery test, especially excellent characteristics.
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