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A piezoelectric strain combined micro-vibration measuring device

A measuring device and combined technology are applied in the field of force sensors to achieve the effects of improving reliability, increasing sensitivity and high integration.

Active Publication Date: 2018-12-21
BEIJING INST OF SPACECRAFT SYST ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] At present, there is no literature report on this kind of ultra-low frequency micro-vibration measurement system at home and abroad.

Method used

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  • A piezoelectric strain combined micro-vibration measuring device
  • A piezoelectric strain combined micro-vibration measuring device
  • A piezoelectric strain combined micro-vibration measuring device

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Embodiment Construction

[0031] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0032] The technical solution adopted by the present invention to solve the technical problem is: a piezoelectric strain combined micro-vibration measuring device, the measuring frequency of which can cover 0-1000 Hz.

[0033] Such as figure 1 Shown is a structural schematic diagram of a piezoelectric strain combined micro-vibration measuring device. It can be seen from the figure that a piezoelectric strain combined micro-vibration measuring device includes a chassis 1, a piezoelectric strain combined force sensor 2 and a table 3; wherein the chassis 1 is located at the bottom ; The piezoelectric strain combined force sensor 2 is fixedly installed on the upper surface of the chassis 1; the table 3 is fixedly installed on the upper surface of the piezoelectric strain combined force sensor 2;

[0034] Such as figure 2 Shown is a schematic diag...

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Abstract

The invention relates to a combined piezoelectric strain vibration measurement device and relates to the force sensor field for wideband measurement. The measurement device comprises a chassis, four combined piezoelectric strain force sensors and a table top, wherein the chasis and the table top are connected through the combined piezoelectric strain force sensors, the combined piezoelectric strain force sensors respectively comprise a foundation, a compaction screw, a casing, a piezoelectric sheet protection sheet, a piezoelectric sheet set, a column, a stress concentration hole and a piezoelectric sheet, the casing is fixed on the foundation, the cross section is a hollow quadrangle, each inner wall is disposed with one piezoelectric sheet protection sheet, an inner side of the piezoelectric sheet protection sheet is disposed with the piezoelectric sheet set, each piezoelectric sheet set comprises multiple stretching-compression type piezoelectric sheets and multiple cutting type piezoelectric sheets, a strain sheet is attached to a circular cross section portion of the column, the strain sheet is symmetric about an axis of the column, and six-dimensional force of the table top can be inducted through the strain sheet and the piezoelectric sheets. The measurement device is advantaged in that a vibration force and a vibration torque of a micro disturbance source can be accurately measured, a measurement scope is wide, and measurement reliability is high.

Description

technical field [0001] The invention relates to the field of a force sensor for wide-band measurement, in particular to a piezoelectric strain combined micro-vibration measuring device. Background technique [0002] The six-dimensional force sensor is a common type of mechanical measurement equipment, which is used to measure the reaction force and moment of the connection interface or moving parts to the supporting structure. The disturbing force caused by the movement of moving parts on the spacecraft is also usually measured with a six-dimensional force sensor. [0003] There are many kinds of moving parts used in spacecraft, and the disturbance characteristics are different, which also put forward different requirements for measurement equipment. For flexible accessory drive mechanisms such as solar wing drive mechanism and antenna drive mechanism, the disturbance force includes not only the broadband disturbance generated by the drive motor itself, but also the low fre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01H11/08
CPCG01H11/08
Inventor 李劲东王光远郝刚刚吴蓓蓓管帅赵煜金涛
Owner BEIJING INST OF SPACECRAFT SYST ENG
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