Pre-tightened parallel six-dimensionality acceleration sensor and measuring and sensitivity analyzing method thereof

An acceleration sensor and preloading technology, which is applied in the field of inertial measurement, can solve the problems that it is difficult for the rotation center of the flexible spherical hinge to completely coincide at one point, cannot apply a preloading load, and is difficult to process, and is conducive to miniaturization, Real-time measurement and low processing difficulty

Inactive Publication Date: 2018-11-13
NANJING FORESTRY UNIV
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Problems solved by technology

But its shortcoming is that the triple compound hinge is introduced in the parallel mechanism, the structure is complex and the processing is difficult. In actual engineering, it is difficult to ensure that the rotation centers of

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  • Pre-tightened parallel six-dimensionality acceleration sensor and measuring and sensitivity analyzing method thereof
  • Pre-tightened parallel six-dimensionality acceleration sensor and measuring and sensitivity analyzing method thereof
  • Pre-tightened parallel six-dimensionality acceleration sensor and measuring and sensitivity analyzing method thereof

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Embodiment Construction

[0067] The structure and working process of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0068] First, refer to figure 1 As shown, the present invention provides a pre-tightened parallel six-dimensional acceleration sensor, which includes a housing 1, a cubic mass 2 and eight pre-tightened branch chains 3, which will be introduced separately below.

[0069] The housing 1 is a rigid structure, which is designed as a T-shaped structure in this embodiment, and has a plate-shaped horizontal part with legs and a vertical part with a roughly cubic structure. Set cavity.

[0070] The cube-mass 2 is arranged in the accommodating cavity of the casing 1 , and each wall surface of the casing 1 is parallel to each surface of the cube-mass 2 one by one.

[0071] please combine figure 2 , The pre-tightening branch chain 3 includes a first ball joint connecting rod 4, a second ball joint connecting rod 5...

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Abstract

The invention discloses a pre-tightened parallel six-dimensionality acceleration sensor and a measuring and sensitivity analyzing method thereof. An eight-branch-chain parallel mechanism is adopted asan elastic body structure of the sensor, so that the sensor has higher rigidity and higher load bearing capacity; pre-tightening force can be applied on piezoelectric ceramic through a pre-tighteningdevice, so that after pre-tightening, the sensor can effectively avoid output signal distortion of the piezoelectric ceramic, and the sensor has higher measuring accuracy. The measuring method can realize real-time measuring of six-dimensionality acceleration by only compiling a program in a computer in advance. By the sensitivity analyzing method, a force coordination equation is established bydigging an inherent constraint relation in a sensor parallel mechanism, statically indeterminate solving of a sensitivity model of the sensor is converted into statically determinate problem solving,then an analytical expression of sensitivity of the sensor is acquired through derivation, so that theoretical guidance is provided for structural optimization design of subsequent sensors.

Description

technical field [0001] The invention belongs to the technical field of inertial measurement, and in particular relates to a pre-tightened parallel six-dimensional acceleration sensor, a measurement method and a sensitivity analysis method thereof. Background technique [0002] As a key component for obtaining information, acceleration sensors play an important role in fields such as engineering vibration measurement, industrial control, inertial navigation and guidance. The theory and technology of traditional low-dimensional acceleration sensors have been perfected day by day, and various acceleration sensor products on the market are not uncommon, but most of them are single-axis sensors. With the diversified development of information and the improvement of information measurement requirements, people are no longer limited to the measurement of pure linear acceleration and pure angular acceleration parameters, and put forward higher requirements for acceleration sensors. ...

Claims

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Application Information

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IPC IPC(8): G01P15/18G01P15/09G01P21/00
CPCG01P15/09G01P15/18G01P21/00
Inventor 张文妍王艳李成刚
Owner NANJING FORESTRY UNIV
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