Mach-zehnder type atomic interferometric gyroscope
US-2020333139-A1 · Oct 22, 2020 · US
Geoid measurement method, geoid measurement apparatus, geoid estimation device, and geoid calculation data collection device
US11585657B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11585657-B2 |
| Application number | US-202217826702-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 27, 2022 |
| Priority date | Jul 24, 2018 |
| Publication date | Feb 21, 2023 |
| Grant date | Feb 21, 2023 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A geoid calculation data is collected easily. A geoid calculation data collection device of the present invention comprises an inertial measurement data acquisition part, a comparison data acquisition part, and a recording part. In the inertial measurement data acquisition part, data related to velocity, position, and attitude angle is acquired as inertially-derived data based on an output of an inertial measurement part having a three-axis gyro and a three-axis accelerometer attached to a moving body. In the comparison data acquisition part, data related to velocity is acquired as comparison data from a source other than the inertial measurement part. In the recording part, inertially-derived data and comparison data are recorded in association with each other. In the inertial measurement part, a bias stability is acquired that allows error arising from plumb line deviation to be distinguished to a predetermined degree.
First claim
Opening claim text (preview).
What is claimed is: 1. A geoid calculation data collection device comprising: an inertial measurement data acquisition part that acquires data related to velocity, position, and attitude angle as inertially-derived data based on an output of an inertial measurement part having a three-axis gyro and a three-axis accelerometer attached to a moving body; a comparison data acquisition part that acquires data related to velocity as comparison data from a source other than the inertial measurement part; and a recording part that records the inertially-derived data and the comparison data in association with each other, wherein the inertial measurement part has a bias stability that allows error arising from plumb line deviation to be distinguished to a predetermined degree. 2. The geoid calculation data collection device according to claim 1 , wherein the inertially-derived data and the comparison data is used to apply a Kalman filter in which the plumb line deviation is included in the state variables in order to estimate state variables including a plumb line deviation. 3. A geoid calculation data collection device comprising: an inertial measurement data acquisition part, provided with an inertial measurement part having a three-axis gyro and a three-axis accelerometer to be attached to a moving body, and that acquires data related to velocity, position, and attitude angle as inertially-derived data; a comparison data acquisition part that acquires data related to velocity as comparison data from a source other than the inertial measurement part; and a recording part that records the inertially-derived data and the comparison data in association with each other, wherein the inertial measurement part has a bias stability that allows error arising from plumb line deviation to be distinguished to a predetermined degree. 4. The geoid calculation data collection device according to claim 3 , wherein the inertially-derived data and the comparison data is used to apply a Kalman filter in which the plumb line deviation is included in the state variables in order to estimate state variables including a plumb line deviation.
Assignees
Inventors
Classifications
Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels (G01C3/20, G01C3/30 take precedence) · CPC title
specially adapted for use on moving platforms, e.g. ship, aircraft · CPC title
Combined instruments indicating more than one navigational value, e.g. for aircraft; Combined measuring devices for measuring two or more variables of movement, e.g. distance, speed or acceleration · CPC title
Determining velocity · CPC title
Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00 · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US11585657B2 cover?
- A geoid calculation data is collected easily. A geoid calculation data collection device of the present invention comprises an inertial measurement data acquisition part, a comparison data acquisition part, and a recording part. In the inertial measurement data acquisition part, data related to velocity, position, and attitude angle is acquired as inertially-derived data based on an output of a…
- Who is the assignee on this patent?
- Japan Aviation Electronics Ind Ltd, Tokyo Inst Tech
- What technology area does this patent fall under?
- Primary CPC classification G01C13/00. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Feb 21 2023 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).