Abstract: The present application provides a piezoelectric sensor, comprising: a base member, having an inverted conical structure at one end; a piezoelectric sensing element, disposed at the other end of the base member; a mass block, disposed on the piezoelectric sensing element; a charge amplifier, disposed above the mass block and electrically connected to the piezoelectric sensing element. The process of installing the piezoelectric sensor provided in the technical solution of the present application on the ground is simple and fast, and its low-frequency response sensitivity is high.

Abstract: The present application refers to the field of sensors, and in particular to a charge output structure, comprising a base, having an insulating member, a piezoelectric element and a mass block successively arranged from inside to outside and radially sleeved thereon; and a pretightening member, sleeved on an outer periphery of the mass block and having an annular structure capable of applying a radial pretightening force to the insulating member, the piezoelectric element and the mass block through shrinking with rise of temperature. Also provided is a piezoelectric acceleration sensor having the above charge output structure. The present application greatly enhances the contact stiffness of the whole structure, thereby achieves better frequency response and resonance of the whole structure.

Abstract: The present disclosure relates to the technical field of sensors, in particular to a piezoelectric ceramic structure, comprising at least one first piezoelectric layer and at least one second piezoelectric layer stacked on each other, wherein the first piezoelectric layer having a first structure in which a piezoelectric coefficient decreases as temperature increases, and the second piezoelectric layer having a second structure in which a piezoelectric coefficient increases as temperature increases, and an electrode layer is disposed between the first piezoelectric layer and the second piezoelectric layer, and disposed on exposed end surfaces of the first piezoelectric layer and the second piezoelectric layer. A piezoelectric acceleration sensor having the above piezoelectric ceramic structure is also provided. The present disclosure provides a piezoelectric ceramic structure with good high temperature properties and a piezoelectric acceleration sensor having the same.

Abstract: The present application provides a piezoelectric sensor, comprising: a base member, having an inverted conical structure at one end; a piezoelectric sensing element, disposed at the other end of the base member; a mass block, disposed on the piezoelectric sensing element; a charge amplifier, disposed above the mass block and electrically connected to the piezoelectric sensing element. The process of installing the piezoelectric sensor provided in the technical solution of the present application on the ground is simple and fast, and its low-frequency response sensitivity is high.