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Piezoelectric Self-Sensing Actuator and Its Filtering Method for Electric Field Interference

A technology of electric field interference and actuators, applied in piezoelectric devices/electrostrictive devices, piezoelectric/electrostrictive/magnetostrictive devices, circuits, etc., can solve problems such as sensor electric field interference, and achieve the elimination of electric field interference, Achieve integrated, easily modular effects

Active Publication Date: 2019-01-11
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of electric field interference in the sensor part after integrating the functions of one or several pieces of piezoelectric materials and use them as actuators and sensors at the same time, and provide a piezoelectric self-sensing actuator and filter for electric field interference method

Method used

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  • Piezoelectric Self-Sensing Actuator and Its Filtering Method for Electric Field Interference
  • Piezoelectric Self-Sensing Actuator and Its Filtering Method for Electric Field Interference

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specific Embodiment approach 1

[0019] Specific implementation mode one: the following combination figure 1 and figure 2 Describe this embodiment, the piezoelectric self-sensing actuator described in this embodiment includes three insulating layers 2, multiple actuator piezoelectric ceramics 3 and sensor piezoelectric ceramics 4,

[0020] Multi-piece actuator piezoelectric ceramics 3 are mechanically connected in series and electrically connected in parallel to form a piezoelectric stack. A piece of insulating layer 2 is respectively arranged on the upper surface and the lower surface of the piezoelectric stack, and the sensor piezoelectric ceramic 4 is arranged on the piezoelectric stack. On the insulating layer 2 on the upper surface of the electric stack, an insulating layer 2 is arranged on the upper surface of the sensor piezoelectric ceramic 4 .

[0021] In this embodiment, the actuator piezoelectric ceramic 3 and the sensor piezoelectric ceramic 4 are integrated based on the structure, and the three...

specific Embodiment approach 2

[0022] Specific implementation mode two: the following combination Figure 1 to Figure 6 Describe this embodiment, the filtering method of the electric field interference of the piezoelectric self-sensing actuator described in this embodiment, the filtering method is applicable to the above-mentioned piezoelectric self-sensing actuator,

[0023] Apply a driving voltage U to the piezoelectric stack P (t), while applying an external load force F above the sensor piezoelectric ceramic 4;

[0024] The filtering method is as follows: the charge amplifier 5 is used to collect the output charge of the sensor piezoelectric ceramic 4, and the charge amplifier 5 converts the collected charge signal into a voltage signal output; the computer 7 is used to collect the driving voltage U P (t);

[0025] Computer 7 will drive the voltage U P (t) Carry out Fourier expansion to form the superposition of sine wave voltages of different amplitudes and frequencies, calculate the external load f...

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Abstract

A piezoelectric self-sensing actuator and a filtering method for electric field interference thereof belong to the technical field of filtering. The invention aims to solve the problem that one or several pieces of piezoelectric material are used as an actuator and a sensor at the same time after their functions are integrated, and the sensor part has electric field interference. The multi-piece actuator piezoelectric ceramics of the piezoelectric self-sensing actuator is mechanically connected in series and electrically connected in parallel to form a piezoelectric stack. The upper surface and the lower surface of the piezoelectric stack are respectively provided with an insulating layer, and the sensor piezoelectric The ceramic is arranged on the insulating layer on the upper surface of the piezoelectric stack; the filtering method is as follows: a charge amplifier is used to collect the output charge of the piezoelectric ceramic of the sensor, and the charge amplifier converts the collected charge signal into a voltage signal for output; a computer is used to collect the driving voltage; After processing, the true value of the output voltage obtained by the sensor piezoelectric ceramics under the action of the external load force is obtained. The invention is used for filtering electric field interference of piezoelectric self-sensing actuators.

Description

technical field [0001] The invention relates to a piezoelectric self-sensing actuator and a filtering method for electric field interference thereof, belonging to the technical field of filtering. Background technique [0002] Many application fields require the functions of detection, control and execution at the same time, and the realization of these functions usually requires actuators and sensors at the same time. The actuator produces displacement or force to complete the desired control action; the sensor measures physical quantities such as displacement or force, which is necessary for both the execution function and the sensing function in a closed-loop system, and if independent actuators and sensors work together , not only the control scheme is more complex and requires a larger installation and assembly space, but it is also not conducive to the development of the system in the direction of miniaturization and integration. Piezoelectric materials are a class of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L41/083H01L41/09H01L41/113H10N30/50H10N30/20H10N30/30
CPCH10N30/50H10N30/20H10N30/302
Inventor 单小彪梁云雷谢涛
Owner HARBIN INST OF TECH