In order to detect the small current signal,this kind of electric current sensor changed the resistance of two InSb-In magneto resistance elements simultaneously,and a signal processing circuit which can enlarge its output voltage greatly was designed.

In order to detect the small current signal,this kind of electric current sensor changed the resistance of two InSb-In magneto resistance elements simultaneously,and a signal processing cir- cuit which can enlarge its output voltage greatly was designed.

In this paper laminated piezoelectric composite materials with orthotropic properties,and struc tures performances of orthotropic piezoelectric sensing elements and actuation elements are studied.

Piezoelectric composite material (PCM) is an important branch of modern sensor and actuator materials with wide applications in smart structures.

This paper discusses the significance of the typical sensory experiments in college physics experiment education Using capacitance sensors as an example,it also describes the principles,methods and results of the experiment,in which the height of the conducting liquid and the proportion of the mixed liquid with polar medium are teste

This paper studies the characteristics of cylindrical electrode used as the conductive liquid height sensor,and describes the experiment principles,methods,processes and results by using this device to measure the height of conductive liquid,meanwhile,shows the function of it to physical experiment education.