Cascade filtering method and device for portable relative gravimeter

A cascade filtering and gravimeter technology, which is applied in the field of surveying and mapping, can solve the problems such as the influence of motion disturbance on the measurement accuracy of the portable relative gravimeter, and achieve the effects of suppressing the disturbance influence, reducing the calculation pressure, and reducing the filter order.

Pending Publication Date: 2022-04-26
HUAZHONG PHOTOELECTRIC TECH INST (CHINA SHIPBUILDING IND CORP THE NO 717 INST)
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Problems solved by technology

[0003] Aiming at the technical problems existing in the prior art, the present invention provides a cascade filtering method and device for a portable relative gravimeter, which can solve the problem that the measurement accuracy of the portable relative gravimeter is affected by motion disturbances

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  • Cascade filtering method and device for portable relative gravimeter
  • Cascade filtering method and device for portable relative gravimeter
  • Cascade filtering method and device for portable relative gravimeter

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Embodiment Construction

[0036] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0037] Such as figure 1 As shown, the embodiment of the present invention provides a cascaded filter device for a portable relative gravimeter. The device includes a digital leveling module, a downsampling module and a FIR filter module.

[0038] The digital leveling module is used to carry out digital leveling to the gravimeter before the gravimeter is measured;

[0039] The down-sampling module is used to down-sample the output data of the gravimeter;

[0040] The FIR filter module is used to filter the down-sampled gravimeter output data to obtain the final output result of the gravimeter.

[0041] Based on the above device, the embodiment of the present invention also provides a cascade filtering method of a ...

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Abstract

The invention relates to a cascade filtering method and device for a portable relative gravimeter, and the scheme comprises two-stage filtering: firstly carrying out the downsampling of the output data of the gravimeter, and then sending the downsampled output data of the gravimeter into an FIR filter for filtering, and obtaining the final output result of the gravimeter. According to the technical scheme, the output precision of the gravimeter is high, high-frequency noise can be suppressed in advance through down-sampling processing of the cascade filter, and the measurement precision is improved. Meanwhile, the scheme saves computing resources, and downsampling processing of the cascade filter can reduce the order of the filter, so that the operation pressure is reduced.

Description

technical field [0001] The invention relates to the technical field of surveying and mapping, in particular to a cascade filtering method and device for a portable relative gravimeter. Background technique [0002] As a measuring instrument capable of sensing environmental gravity information, portable relative gravimeters can not only directly reflect the spatial distribution characteristics of mineral resources and facilitate resource exploration and utilization, but also provide original reference gravity information for military strikes. However, in the actual gravity measurement process, external motion disturbances are often coupled with the gravity field, and are simultaneously measured by the gravity sensor, thereby causing measurement errors. Therefore, it is necessary to adopt an effective method that can separate the motion disturbance from the actual gravity field to improve the accuracy of gravity measurement. Contents of the invention [0003] Aiming at the ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H17/02H03H17/06G01V7/00
CPCH03H17/0283H03H17/06G01V7/00H03H2017/0081
Inventor 冷悦吴明强车驰骋乐晋韩继韬周平璜艾文宇王世博刘元峰廖世康
Owner HUAZHONG PHOTOELECTRIC TECH INST (CHINA SHIPBUILDING IND CORP THE NO 717 INST)
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