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Piezoelectric self-perception performer and filtering method of electric field interference thereof

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 integration and improve the effect of precision

Active Publication Date: 2017-03-08
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-perception performer and filtering method of electric field interference thereof
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  • Piezoelectric self-perception performer and filtering method of electric field interference thereof

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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

The invention provides a piezoelectric self-perception performer and a filtering method of electric field interference thereof, and belongs to the technical field of filtering. A problem that electric field interference exists in parts of sensors since one or more sheets of piezoelectric materials are subjected to functional integration and then used as performers and sensors is solved. Multiple sheets of performer piezoelectric ceramics of the piezoelectric self-perception performer are serially connected physically and parallelly connected electrically so as to form a piezoelectric stack. Insulation layers are respectively arranged on the upper surface and the lower surface of the piezoelectric stack. Sensor piezoelectric ceramics are arranged on the insulation layer of the upper surface of the piezoelectric stack. The filtering method comprises steps that an electric charge amplifier is adopted to acquire output electric charge of the sensor piezoelectric ceramics; the electric charge charger converts the acquired electric charge signals to voltage signals for output; a computer is used for acquiring driving voltage; and after processing, an output voltage real value acquired during external load force of the sensor piezoelectric ceramics is acquired. The filtering method is used for filtering of electric field interference of the piezoelectric self-perception performer.

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 Applications(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