Impedance head

Impedance headIt is a transducer element for measuring mechanical impedance and a sensor for measuring point impedance. Its performance has a significant impact on the test results. Piezoelectric typeImpedance headIt is a commonly used transducer element in mechanical impedance measurement of structures, which can simultaneously measure the signals of force and acceleration at the same point of the structure, thus facilitating the measurement of the impedance at the origin of the structure.

The measurement of mechanical impedance of a structure involves modal analysis and dynamic characterization of the structureSexual research

foundation,So forImpedance=HeadAccuracy of mechanical impedance data obtainedAnd its impact

Modal analysis is a fast, effective, accurate, and economical method for studying the dynamic characteristics of components and structures. Mechanical impedance as a description of motion(admittance)parameters,It is a very important test quantity in modal analysis experiments. Due to impedance=head(acceleration-force sensor)The quality itself is very light,Therefore, it is widely used in modal analysis experiments.

The adopted sensor element structure optimizes sensor performance. Therefore, this device can simultaneously measure dynamic acceleration and force at the same position of the test structure. By using internal crystal insulation and channel phase matching, it is possible to collect driving points with spatiotemporal consistency（DPdata In modal testing research, driving points（DP） Data is crucial because any error directly affects the modal shape. By utilizing the measurement value provided by this impedance sensor, the required impedance transfer function can be easily and accurately derived.DFT1500Type impedance=head, due to its structure, can ignore strain sensitivity; Enable it to perform measurements on flexible structures. The sensitivity of acceleration and force is not affected by installation The influence of torque or mass load. Built in features such as high sensitivity, low noise, and high stiffness, etc***At the same time as precision, the input requirements for force are reduced to a low level. In many cases, this is very appropriate because it can both reduce the applied stress to a low level and ignore test fatigue. Each impedance=head is equipped with two sensor elements, and PiezotronInterconnection of microelectronic circuits; This circuit converts the charge signal generated by piezoelectric elements into a low impedance usable signal High level voltage signal.