US 11,693,105 B2Granted

Electromagnetic wave field data processing method and apparatus, and medium

AssigneeInstitute of Geology and Geophysics, Chinese Academy of Sciences

InventorsChangmin Fu, Qingyun Di, Miaoyue Wang, Meigen Zhang, Xiaotian Wang

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Abstract

An electromagnetic wave field data processing method is provided and includes determining loss-free electromagnetic wave field data corresponding to electromagnetic wave field data according to the electromagnetic wave field data; performing first amplitude compensation on the electromagnetic wave field data and the loss-free electromagnetic wave field data; extracting waveform information; determining a first sequence corresponding to the electromagnetic wave field data and a second sequence corresponding to the loss-free electromagnetic wave field data which meet a preset condition respectively from the waveform information, determining time sequences corresponding to the first sequence and the second sequence; and determining an attenuation coefficient of the electromagnetic wave field data according to a first preset mode and performing second amplitude compensation on the electromagnetic wave field data according to the attenuation coefficient.

Claims9

Dependent claims

An electromagnetic wave field data processing method, comprising:

determining loss-free electromagnetic wave field data corresponding to actual electromagnetic wave field data according to the actual electromagnetic wave field data;
performing a first amplitude compensation on the actual electromagnetic wave field data and the loss-free electromagnetic wave field data, wherein the first amplitude compensation is to compensate an amplitude error caused by geometrical attenuation to the actual electromagnetic wave field data and the loss-free electromagnetic wave field data;
extracting waveform information of electromagnetic waves in the actual electromagnetic wave field data and waveform information of electromagnetic waves in the loss-free electromagnetic wave field data;
determining a first characteristic value sequence corresponding to the actual electromagnetic wave field data and a second characteristic value sequence corresponding to the loss-free electromagnetic wave field data which meet a preset condition respectively from the waveform information of the electromagnetic waves in the actual electromagnetic wave field data and the waveform information of the electromagnetic waves in the loss-free electromagnetic wave field data, and determining time sequences corresponding to the first characteristic value sequence and the second characteristic value sequence;
and
determining an attenuation coefficient of the actual electromagnetic wave field data according to a first preset mode, and performing a second amplitude compensation on the actual electromagnetic wave field data according to the attenuation coefficient, wherein the second amplitude compensation is to compensate an amplitude error caused by the attenuation coefficient to the actual electromagnetic wave field data;
wherein determining an attenuation coefficient of the actual electromagnetic wave field data according to a first preset mode comprises:
inputting the first characteristic value sequence, the second characteristic value sequence and the time sequences into a formula
ln
⁢
χ
⁡
(
x
,
t
)
G
⁡
(
x
,
t
)
=
-
β
⁢
t
+
b
to determine the attenuation coefficient of the actual electromagnetic wave field data,
wherein X(x,t) is the actual electromagnetic wave field data, G(x,t) is the loss-free electromagnetic wave field data, β is the attenuation coefficient, t is time, x is a distance from a field source to a receiving point, and b is a constant.

30 more elements

An electromagnetic wave field data processing apparatus, comprising:

a first determination unit, configured to determine loss-free electromagnetic wave field data corresponding to actual electromagnetic wave field data according to the actual electromagnetic wave field data;
a first compensation unit, configured to perform a first amplitude compensation on the actual electromagnetic wave field data and the loss-free electromagnetic wave field data, wherein the first amplitude compensation is to compensate an amplitude error caused by geometrical attenuation to the actual electromagnetic wave field data and the loss-free electromagnetic wave field data;
an extraction unit, configured to extract waveform information of electromagnetic waves in the actual electromagnetic wave field data and waveform information of electromagnetic waves in the loss-free electromagnetic wave field data;
a second determination unit, configured to determine a first characteristic value sequence corresponding to the actual electromagnetic wave field data and a second characteristic value sequence corresponding to the loss-free electromagnetic wave field data which meet a preset condition respectively from the waveform information of the electromagnetic waves in the actual electromagnetic wave field data and the waveform information of the electromagnetic waves in the loss-free electromagnetic wave field data, and determine time sequences corresponding to the first characteristic value sequence and the second characteristic value sequence;
and
a second compensation unit, configured to determine an attenuation coefficient of the actual electromagnetic wave field data according to a first preset mode and a perform second amplitude compensation on the actual electromagnetic wave field data according to the attenuation coefficient, wherein the second amplitude compensation is to compensate an amplitude error caused by the attenuation coefficient to the actual electromagnetic wave field data;
wherein determining an attenuation coefficient of the actual electromagnetic wave field data according to a first preset mode comprises:
inputting the first characteristic value sequence, the second characteristic value sequence and the time sequences into a formula
ln
⁢
χ
⁡
(
x
,
t
)
G
⁡
(
x
,
t
)
=
-
β
⁢
t
+
b
to determine the attenuation coefficient of the actual electromagnetic wave field data,
wherein X(x,t) is the actual electromagnetic wave field data, G(x,t) is the loss-free electromagnetic wave field data, β is the attenuation coefficient, t is time, x is a distance from a field source to a receiving point, and b is a constant.

30 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/420,702Filed 30 Apr 2020
Priority: CN 202010237891.830 Mar 2020
Published: US 2023/0021093 A119 Jan 2023
Granted: 4 Jul 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

G01S 13/58
Systems of measurement based on relative movement of target: velocity or trajectory determination systems; Sense-of-movement determination systems
G01S 7/40
Of systems according to group G01S13/00: means for monitoring or calibrating
G01S 13/885
Radar or analogous systems specially adapted for specific applications: for ground probing
G01S
Radio direction-finding