US 12,748,059 B2Granted

Method and system of full-field three dimensional displacement measurement via microwave sensing

AssigneeShanghai Jiao Tong University

InventorsZhike Peng, Yuyong Xiong, Yingjie Gou, Guang Meng

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Abstract

A method and system of full-field 3D displacement measurement via microwave sensing relates to the field of displacement measurement, such as deformation and vibration measurement. A structure coordinate system (SCS) is established based on a target under measurement, and a device coordinate system (DCS) is established based on microwave transceivers. Measuring points are mapped from the SCS into range-angle heatmaps of the microwave transceivers and thereby matched. Displacement time series of the measuring points on the target under measurement are monitored, obtaining initial 3D displacement time series of the target under measurement in the DCS. Based on a transformation relationship from the DCS to the SCS, transformed 3D displacement time series of the target under measurement in the SCS are calculated. The present application enables automatic full-field selection and matching of measuring points in microwave sensing based 3D displacement measurement in complex applications.

Claims17

Dependent claims

A method of full-field three-dimensional (3D) displacement measurement via microwave sensing, comprising:

selecting reference targets and establishing a structure coordinate system (SCS) based on a target under measurement;
calculating coordinates of microwave transceivers in the SCS based on distances between the microwave transceivers and the reference targets;
wherein the microwave transceivers comprise a first microwave transceiver, a second microwave transceiver and a third microwave transceiver;
establishing a device coordinate system (DCS) based on the calculated coordinates of the first microwave transceiver, the second microwave transceiver and the third microwave transceiver in the SCS;
calculating coordinates of the target under measurement in range-angle heatmaps of the microwave transceivers based on coordinates of the target under measurement and the microwave transceivers in the SCS, and matching measuring points of the target under measurement in the range-angle heatmaps of the microwave transceivers;
monitoring displacement time series of the target under measurement by the first microwave transceiver, the second microwave transceiver and the third microwave transceiver, thereby obtaining initial 3D displacement time series of the target under measurement in the DCS;
establishing a coordinate transformation relationship from the DCS to the SCS based on the DCS and the SCS;
and
calculating transformed 3D displacement time series of the target under measurement in the SCS based on the coordinate transformation relationship and the initial 3D displacement time series.

6 more elements

A system of full-field three-dimensional (3D) displacement measurement via microwave sensing, comprising:

a reference target module configured to be able to select reference targets and to establish a structure coordinate system (SCS) based on a target under measurement;
a coordinate calculation unit configured to be able to calculate coordinates of microwave transceivers in the SCS based on distances between the microwave transceivers and the reference targets;
wherein the microwave transceivers comprise a first microwave transceiver, a second microwave transceiver and a third microwave transceiver;
a 3D displacement calculation module configured to be able to establish a device coordinate system (DCS) based on the calculated coordinates of the first microwave transceiver, the second microwave transceiver and the third microwave transceiver in the SCS;
a measuring point matching and selection module configured to be able to calculate coordinates of the target under measurement in range-angle heatmaps of the microwave transceivers based on coordinates of the target under measurement and the microwave transceivers in the SCS, and to match measuring points of the target under measurement in the range-angle heatmaps of the microwave transceivers;
a microwave sensing and control module configured to be able to monitor displacement time series of the target under measurement using the first microwave transceiver, the second microwave transceiver and the third microwave transceiver;
the 3D displacement calculation module further configured to be able to obtain initial 3D displacement time series of the target under measurement in the DCS;
a coordinate transformation relationship calculation unit configured to be able to establish a coordinate transformation relationship from the DCS to the SCS based on the DCS and the SCS;
and
an SCS 3D displacement transformation unit configured to be able to calculate transformed 3D displacement time series of the target under measurement in the SCS based on the coordinate transformation relationship and the initial 3D displacement time series.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 19/002,905Filed 27 Dec 2024 · continuation in part
Priority: CN 202411103757.312 Aug 2024
Published: US 2026/0043755 A112 Feb 2026
Granted: 29 Sep 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

G01N 22/00
Investigating or analysing materials by the use of microwaves or radio waves
G01B 15/06
Measuring arrangements characterised by the use of electromagnetic waves or particle radiation, e.g. by the use of microwaves, X-rays, gamma…
G01N
Investigating or analysing materials by determining their chemical or physical properties
G01B
Measuring length, thickness or similar linear dimensions