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Inertia measurement device for deep-sea inertia navigation

An inertial measurement device and inertial navigation technology, which is applied in directions such as navigation through speed/acceleration measurement, can solve problems such as impact of the measurement device, impact on measurement accuracy, and large errors, and achieve improved accuracy, high precision, and good anti-vibration performance Effect

Inactive Publication Date: 2009-09-16
ZHEJIANG UNIV
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Problems solved by technology

[0005] The current inertial measurement devices generally do not use vibration reduction measures, so when navigating in deep sea, especially when the vehicle is diving and working in a complex environment in deep sea, the violent shaking will cause impact on the measuring device and affect its measurement accuracy
Due to the random measurement error of the accelerometer itself, the method of using only one accelerometer for measurement in the three directions also brings a large error

Method used

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  • Inertia measurement device for deep-sea inertia navigation
  • Inertia measurement device for deep-sea inertia navigation
  • Inertia measurement device for deep-sea inertia navigation

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Embodiment 1

[0021] The structure of the inertial measurement device of the present invention includes: 6 accelerometers, 3 gyroscopes, sensor brackets, vibration-damping materials, vibration-damping inner and outer brackets and installation surfaces.

[0022] The assembly process of the IMU structure is as follows: Figure 1~4 shown. Such as figure 1 As shown, six accelerometers 2 are respectively installed in the six cavities of the sensor bracket 1 . The two accelerometers of the large range and the small range are installed coaxially and concentrically, and the three groups of accelerometers are perpendicular to each other. Three gyroscopes 3 are vertically installed on three faces of the hexahedron. The sensor bracket 1 is a regular hexahedron, the details are as follows Figure 5 shown. In the figure, 6 cylindrical holes 1d are coaxial in pairs, and 3 groups of cylindrical holes are perpendicular to each other. The cylindrical hole is used to install the accelerometer 2. There ...

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Abstract

The invention relates to an inertia measurement device for deep-sea inertia navigation, which consists of six accelerometers, three gyros, a sensor bracket, a damping material, damping internal and external brackets and a mounting surface. The accelerometers and the gyros are arranged at the regular hexahedral sensor bracket. The damping internal bracket is fixed at the sensor bracket, the damping material is fixed at the damping internal bracket, the internal bracket is connected with the external bracket through the damping material and finally connected to the mounting surface, and the mounting surface is provided with a positioning surface for positioning at initial alignment. The measurement device is used for measuring the inertia of the deep-sea inertia navigation, and has the advantages of high precision and good damping property.

Description

technical field [0001] The invention relates to a structure of an inertial measurement device, which is used for the measurement of acceleration and angular velocity in deep sea and other conditions without reference, and a computer processes the information to obtain position information to achieve the purpose of navigation. technical background [0002] The inertial navigation system is an active navigation system that does not rely on external information and does not radiate energy to the outside. The working environment of inertial navigation includes air, ground and sea. Especially in deep-sea navigation, since the GPS navigation method cannot obtain GPS signals in the deep sea, the navigation at this time can only be carried out by the active navigation method of inertial navigation. [0003] Inertial navigation systems are based on Newton's classical laws of mechanics. According to Newton's second law, an external force will produce a proportional acceleration on a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/16
Inventor 叶凌云宋开臣程佳
Owner ZHEJIANG UNIV
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