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A Resonant Sensing Piezoelectric Stack Sensing Actuator

A piezoelectric stack and actuator technology, which is applied to the measurement of the property force of piezoelectric devices, piezoelectric effect/electrostrictive or magnetostrictive motors, instruments, etc., and can solve the problems of reducing the performance of actuators , to achieve the effect of improving stability and anti-interference ability, reducing size and strong anti-interference ability

Active Publication Date: 2019-08-06
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the internal actuators of the existing sensing actuators generate interference electric fields that interfere with the sensors, thereby causing performance degradation of the actuators, the present invention proposes a resonant sensing piezoelectric stack sensing actuator. The technology adopted The scheme is as follows:

Method used

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  • A Resonant Sensing Piezoelectric Stack Sensing Actuator
  • A Resonant Sensing Piezoelectric Stack Sensing Actuator
  • A Resonant Sensing Piezoelectric Stack Sensing Actuator

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Embodiment 1

[0029] Embodiment 1 proposes a piezoelectric stack sensing actuator with resonant sensing, such as figure 1 As shown, the sensor actuator includes a package cavity 1, a fixed sleeve 2, a piezoelectric stack 3, a transmission mechanism 4, a sensor 5, a thrust rod 6, a pretension spring 7 and an end cover 8; the fixed sleeve The cylinder 2 , the piezoelectric stack 3 , the conduction mechanism 4 , the sensor 5 , the thrust rod 6 , and the pretension spring 7 are all encapsulated inside the encapsulation cavity 1 through the end cap 8 .

[0030] A resonant sensor piezoelectric stack sensor actuator proposed in this embodiment combines the sensor and actuator together, and highly integrates the simple structure-integrated sensor actuator, in the same sensor actuator Combine the two types of structural integration and functional integration, so that it has a structurally integrated structure, and at the same time integrates sensors and actuators, making it functionally integrated, ...

Embodiment 2

[0032] This embodiment is a further limitation of the resonant sensing piezoelectric stack sensing actuator described in Embodiment 1, such as figure 1 As shown, the fixing sleeve 2 is arranged at the bottom of the packaging cavity 1; one end of the piezoelectric stack 3 is fixed in the hole of the fixing sleeve 2, and the other end is fixed in the In the slot hole of the bottom surface of the transmission mechanism 4; the sensor 5 is arranged inside the transmission mechanism 4; the upper bottom surface of the transmission mechanism 4 is equipped with a thrust rod 6; the end cover 8 is provided with an opening; The thrust rod 6 passes through the opening of the end cover 8 to receive external force.

[0033]Quartz specifically has force-frequency characteristics. When the quartz resonator is subjected to stress, the resonant frequency will change accordingly and have a linear relationship with the applied stress, and the frequency stability of the quartz crystal is excellent ...

Embodiment 3

[0036] This embodiment is a further definition of the resonant sensing piezoelectric stack sensor actuator described in Embodiment 1. The lower bottom surface of the closed cavity 1 is a closed bottom surface; the upper surface of the closed cavity 1 The opening of the bottom surface further forms a cavity structure, and an internal thread is provided on the inner wall of the cavity close to the upper bottom surface; two lead holes are provided on the cavity of the closed cavity 1; the lead holes are used to connect the inside of the cavity Existing signal lines are guided outside the cavity.

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Abstract

The invention provides a resonant sensing piezoelectric stack sensing actuator, which belongs to the technical field of sensor and actuator integration. The sensor actuator comprises a package chamber, a fixed sleeve, a piezoelectric stack, a conductive mechanism, a sensor, a thrust rod and an end cap. The fixed sleeve, the piezoelectric stack, the conductive mechanism, the sensor, the thrust rodand a preloaded spring are packaged in the package chamber through the end cap. The resonant sensing piezoelectric stack sensing actuator has the advantages of high stability, strong anti-interferenceability and the like.

Description

technical field [0001] The invention relates to a resonance-type piezoelectric stack sensing actuator, which belongs to the technical field of integration of sensors and actuators. Background technique [0002] Sensor-actuator is a means of integrating the functions of traditional sensors and actuators. Sensor-actuators are divided into structural integration and function integration. The classification is based on the integration of sensors and actuators. The main difference lies in sensing and execution. Whether the function is assumed and realized by the same device. As far as the structure-integrated piezoelectric sensor-actuator is concerned, its sensing function and execution function are respectively undertaken by two independent devices; in contrast, the function-integrated sensor-actuator uses the same device to realize sensing and execution. Function. In the process of sensor-actuator integration, because the actuator part of the sensor-actuator will cause comple...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/00G01L1/16
CPCG01L1/162H02N2/008
Inventor 单小彪董欣罗佩琳谢涛
Owner HARBIN INST OF TECH