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Navigation device with turntable for index measuring and method for operating the navigation device

A technology of navigation equipment and turntable, which is used in navigation, mapping and navigation, navigation and other directions through speed/acceleration measurement. Increase, power consumption increase, effect of low power consumption

Active Publication Date: 2018-04-17
NORSROP GRUMAN LITEF GMBKH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, especially when using the navigation system over a longer period of time, the intensive use of the turntable can lead to wear or wear of the mechanically moving parts and thus to inaccuracies in the mechanical rotation of the turntable, especially in the end positions or Aspects of precision in rotational position
These inaccuracies can lead to increased navigation errors over time due to the increasingly inaccurate positioning of the turntable, and to a reduction in the useful life of the overall device due to lack of accuracy.

Method used

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  • Navigation device with turntable for index measuring and method for operating the navigation device
  • Navigation device with turntable for index measuring and method for operating the navigation device
  • Navigation device with turntable for index measuring and method for operating the navigation device

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Embodiment Construction

[0040] figure 1 A schematic top view of a navigation device with a turntable 1 is shown, which carries an inertial measurement unit 2 and is able to rotate about an axis 3 together with the inertial measurement unit 2 .

[0041] The inertial measurement unit 2 may be, for example, a MEMS measurement unit. The construction of MEMS measuring cells is known from the prior art and will therefore not be described further.

[0042] The orientation of the turntable 1 can be seen by the arrows marked on the turntable 1 .

[0043] figure 1 In a, the turntable 1 and the inertial measurement unit 2 are in the first position.

[0044] In the overturning measurement, when the unshown rotary drive device receives the corresponding rotation control signal, the rotation of the turntable 1 is triggered, and the turntable 1 together with the inertial measurement unit 2 ( figure 1 b) Rotate to the swivel position deflected by 180 degrees ( figure 1 c). It can be seen from the change of the...

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Abstract

The invention relates to a navigation device comprising a turntable (1) which can be rotated about an axis (3) in at least two different rotary positions, in accordance with a rotary control signal. An inertial measuring unit (2) is arranged on the rotary table (1) which can be rotated with the rotary table (1). The quality of the measurement data can be determined by the initial measuring unit (2) with the help of an evaluation device. When the determined quality does not reach a predetermined minimum quality, the rotary table (1) rotates in the respective other rotary position.

Description

technical field [0001] The invention relates to a navigation device with a turntable suitable for rollover measurements, and to a method of operating the navigation device. Background technique [0002] For the navigation of moving objects, eg in the field of shipping, there are documented requirements for navigation aids, eg documented in IMOA.821. If the navigation device has an inertial sensor system (for example an inertial measurement unit), this must be correspondingly powerful and accurate, which entails considerable costs. [0003] In applications with smaller budgets, it is often sufficient to use inexpensive navigation equipment which inevitably uses less accurate sensing devices. It has been found that some sensor errors related to navigation performance can be estimated and compensated by means of rollover measurements and by mathematical methods. In this way, the requirements specified in the standard can be met even with simpler sensors. [0004] However, de...

Claims

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Application Information

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IPC IPC(8): G01C21/16G01C25/00
CPCG01C25/005G01C21/166G01C21/183G01C25/00
Inventor U·赫伯斯U·普罗布斯特M·德克
Owner NORSROP GRUMAN LITEF GMBKH
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