Collocated multitone acoustic beam and electromagnetic flux leakage evaluation downhole
US-10465509-B2 · Nov 5, 2019 · US
Underground measuring apparatus
US11505915B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11505915-B2 |
| Application number | US-201916720584-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 19, 2019 |
| Priority date | Sep 25, 2019 |
| Publication date | Nov 22, 2022 |
| Grant date | Nov 22, 2022 |
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- Title
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Abstract
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The present invention is aimed to reduce power consumption of a measuring apparatus. A measuring apparatus according to the present invention is to be disposed in an excavation section of an underground excavator. The measuring apparatus according to the present invention includes a first measurement module, a second measurement module, and an information processor. The first measurement module includes a triaxial first accelerometer and a triaxial first magnetometer for performing highly-accurate measurement. The second measurement module includes a triaxial second accelerometer and a triaxial second magnetometer for performing measurement during excavation. The information processor controls the first measurement module and the second measurement module and obtains a position and an attitude of the excavation section based on output data of the first measurement module or the second measurement module. Further, the second accelerometer and the second magnetometer are MEMS sensors.
First claim
Opening claim text (preview).
What is claimed is: 1. A measuring apparatus that is to be disposed in an excavation section of an underground excavator and supplied with power from a battery disposed in the excavation section, the measuring apparatus comprising: a first measurement module that includes a triaxial first accelerometer and a triaxial first magnetometer for performing highly-accurate measurement; a second measurement module that includes a triaxial second accelerometer and a triaxial second magnetometer for performing measurement during excavation; and an information processor that controls the first measurement module and the second measurement module, obtains a position and an attitude of the excavation section based on output data of the first measurement module or the second measurement module, and has a function of turning off power supply of the first measurement module while maintaining power supply of the second measurement module, wherein the second accelerometer and the second magnetometer are MEMS sensors; and the information processor turns off power supply of the first measurement module before the start of excavation. 2. The measuring apparatus according to claim 1 , wherein the information processor corrects an error of output data of the second measurement module based on output data of the first measurement module. 3. The measuring apparatus according to claim 1 , wherein the information processor corrects calibration data for the second measurement module based on output data of the first measurement module.
Assignees
Inventors
Classifications
involving use of the magnetic field of the earth · CPC title
- E02F9/264Primary
Sensors and their calibration for indicating the position of the work tool · CPC title
using electromagnetic energy or detectors therefor · CPC title
operating with magnetic or electric fields produced or modified either by the surrounding earth formation or by the detecting device (with electromagnetic waves G01V3/30) · CPC title
with follow-up actions (e.g. control signals sent to actuate the work tool) · CPC title
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- What does patent US11505915B2 cover?
- The present invention is aimed to reduce power consumption of a measuring apparatus. A measuring apparatus according to the present invention is to be disposed in an excavation section of an underground excavator. The measuring apparatus according to the present invention includes a first measurement module, a second measurement module, and an information processor. The first measurement module…
- Who is the assignee on this patent?
- Japan Aviation Electronics Ind Ltd
- What technology area does this patent fall under?
- Primary CPC classification E02F9/264. Mapped technology areas include Fixed Constructions.
- When was this patent published?
- Publication date Tue Nov 22 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).