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Impact-type piezoelectric acceleration transducer

A piezoelectric acceleration and sensor technology, applied in the field of shock vibration, can solve the problems of few acceleration sensors and the inability of the sensors to meet the requirements of use, and achieve the effect of convenient adjustment

Active Publication Date: 2012-11-28
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some special occasions, sensors relying on a single output mode can no longer meet the requirements of use
Combining the characteristics of the analog output sensor with the output of the switch sensor can meet the needs of some special occasions, but there are still few acceleration sensors with both analog and switch output.

Method used

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  • Impact-type piezoelectric acceleration transducer
  • Impact-type piezoelectric acceleration transducer

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Embodiment Construction

[0017] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0018] as attached figure 1 It shows that the impact piezoelectric acceleration sensor of the present invention includes a cross elastic beam 1, a piezoelectric module, an impact pad 4, a base 5, an upper cover 8, a positive lead 9 and a negative lead 10, wherein the cross elastic beam 1 is a cross-shaped planar structure , with a circular via hole in the center; the base core 6 is an inverted T-shaped cylindrical step structure, an annular groove is provided on the step surface of the step structure, and a threaded section is processed on the cylindrical surface on the step surface; the piezoelectric module includes a mass block 2 , the piezoelectric material 3, the base core 6 and the insulating nut 7, wherein the piezoelectric material 3 and the mass block 2 are sequentially set on the stepped surface of the base core 6, and the insulating nut 7 is conn...

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Abstract

The invention relates to an impact-type piezoelectric acceleration transducer, and belongs to the technical field of impact vibration. The transducer comprises a cross-shaped elastic beam, a mass block, a piezoelectric material, an impact cushion, a base, a foundation core, an insulation nut, a spacing cover and a leading wire, wherein the mass block, the piezoelectric material and the foundation core form a piezoelectric module; the cross-shaped elastic beam supports a piezoelectric module, and prepressing resisting power is provided for the cross-shaped elastic beam by the spacing cover; as long as the inertial force suffered by the transducer is greater than the prepressing resisting power, the cross-shaped elastic beam can move, thus the transducer has characteristics of a switch; and when the piezoelectric module and the impact cushion are collided, the transducer outputs analog quantity acceleration signals. The piezoelectric acceleration transducer provided by the invention has the characteristics of simple structure, adjustable switch displacement, obvious output signal characteristics, and easiness in subsequent treatment.

Description

technical field [0001] The invention relates to a piezoelectric acceleration sensor, in particular to a piezoelectric acceleration sensor with switching and analog output characteristics, and belongs to the technical field of shock vibration. Background technique [0002] At present, the output of acceleration sensors is generally divided into analog output and switch output, such as piezoelectric acceleration sensors and acceleration threshold switches. The sensors of these two output modes have their own advantages and disadvantages. In some special occasions, sensors relying on a single output mode can no longer meet the requirements of use. Combining the characteristics of the analog output sensor with the output of the switch sensor can meet the needs of some special occasions. However, there are still few acceleration sensors with both analog and switch outputs. Contents of the invention [0003] In view of this, the present invention provides an impact piezoelectri...

Claims

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Application Information

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IPC IPC(8): G01H11/08
Inventor 石庚辰于润祥隋丽王俊张有进彭洪生
Owner BEIJING INSTITUTE OF TECHNOLOGYGY