The probe's linearity, temperature and dynamic characteristics are analyzed base on principal theory of eddy-current displacement sensor, such as the influence of the coil Q value to the linearity characteristic, influence of the diameter of coil to the linearity characteristic, influence of coil resistance to the temperature characteristic, influence of the measuring coil to the syntony loop.

This paper introduced a method of measuring the diameter of uncoiler of aluminum strip cold mill by using the ultrasonic transducer,and the diameter of coiler can be obtained through calculating. It improved the reliability of measuring diameter of coil.

In a non-linear non-diagonal GMI sensor for weak magnetic field, the pickup coil parameters, including the length, the diameter of coil tube, the number of turns as well as the diameter of the coil wire, in relation to the sensor sensitivity are investigated.

The helical coil springs with equal helical angle and variable diameter of coils have many special uses in industry, but its design and calculating method has not been established. Based on the establishment of basic equation,this paper provides a complete set of design and calculating method, including load-deflection characteristics, hold-load of each coil, maximum stress of each coil, interrelating parameters and the influence of helical angle and taper angle, etc. This method fills...

The helical coil springs with equal helical angle and variable diameter of coils have many special uses in industry, but its design and calculating method has not been established. Based on the establishment of basic equation,this paper provides a complete set of design and calculating method, including load-deflection characteristics, hold-load of each coil, maximum stress of each coil, interrelating parameters and the influence of helical angle and taper angle, etc. This method fills up the gap in calculating this type of spring and it is practical.

This paper introduced a method of measuring the diameter of uncoiler of aluminum strip cold mill by using the ultrasonic transducer,and the diameter of coiler can be obtained through calculating.It improved the reliability of measuring diameter of coil.

In a non-linear non-diagonal GMI sensor for weak magnetic field, the pickup coil parameters, including the length, the diameter of coil tube, the number of turns as well as the diameter of the coil wire, in relation to the sensor sensitivity are investigated. The results showed that the sensitivity is directly proportional to the ac driving frequency, and the number of turn density of the pick-up coil. With smaller wire diameter and smaller coil diameter, the sensor...

In a non-linear non-diagonal GMI sensor for weak magnetic field, the pickup coil parameters, including the length, the diameter of coil tube, the number of turns as well as the diameter of the coil wire, in relation to the sensor sensitivity are investigated. The results showed that the sensitivity is directly proportional to the ac driving frequency, and the number of turn density of the pick-up coil. With smaller wire diameter and smaller coil diameter, the sensor sensitivity improves. With a 1 000 turns coil, a sensitivity of 3.518×10-2V/Am-1 was achieved in the testing range of ±400 A/m. Its resolution is up to 10-7A/m and can be worked up to 150℃. This shows great potential for weak magnetic field detection and other applications. The experimental results are explained, taking account for Faraday inductive law and coil parameters.