CN-122026632-A - Underground wireless energy information co-transmission system and axial deviation detection method thereof

CN122026632ACN 122026632 ACN122026632 ACN 122026632ACN-122026632-A

Abstract

The invention provides an underground wireless energy communication system and an axial deviation detection method thereof, which relate to the technical field of wireless energy transmission, the system comprises a transmitting coil, a primary side main circuit and a primary side communication circuit which are connected with the transmitting coil, a receiving coil, a secondary side main circuit and a secondary side communication circuit which are connected with the receiving coil, a detection coil and a secondary side deviation detection circuit which is connected with the detection coil, the secondary side offset detection circuit is also connected with a secondary side communication circuit, and an additional detection coil is added on the secondary side of the coupler, the offset distance between the current primary and secondary side coils is deduced by means of the change of the output voltage of the detection coil, and the position information is fed back to the primary side through a wireless communication link of the primary and secondary sides. According to the characteristics of the wireless energy communication system, the offset distance detection function can be realized by only using one set of additional detection coils and a common voltage sampling device matched with the additional detection coils, and the device has the outstanding advantages of high efficiency, low cost and high detection precision.

Inventors

XU XINGAN
WANG SHENG
XUE DEDONG
ZHENG CHUNFENG
SHEN QIONG
ZHAN MIN
ZHANG ZHANRUI
WANG YAO
ZHANG LEI
GUO PEIWEN

Assignees

中国海洋石油集团有限公司
中海油能源发展股份有限公司

Dates

Publication Date: 20260512
Application Date: 20251222

Claims (10)

1. The underground wireless energy communication system is characterized by comprising a transmitting coil, a primary side main circuit and a primary side communication circuit which are connected with the transmitting coil, a receiving coil, a secondary side main circuit and a secondary side communication circuit which are connected with the receiving coil, a detecting coil and a secondary side offset detecting circuit which is connected with the detecting coil, wherein the secondary side offset detecting circuit is also connected with the secondary side communication circuit; The transmitting coil, the receiving coil and the detecting coil are of a cylindrical structure, and the detecting coil and the receiving coil are arranged up and down and have fixed distance to form a sleeve type coupling mechanism together with the transmitting coil; the secondary side communication circuit obtains the detection voltage of the secondary side offset detection circuit, obtains the axial offset distance of the sleeve type coupling mechanism according to the detection voltage and the relation between the preset detection voltage and the offset distance, and sends the axial offset distance to the primary side communication circuit.
2. The downhole wireless energy co-transmission system of claim 1, wherein the relationship between the detected voltage and the offset distance is determined by: acquiring detection voltages at different axial offset distances; And performing function fitting according to different axial offset distances and corresponding detection voltages to obtain a functional relation between the detection voltages and the offset distances.
3. The underground wireless energy communication system of claim 2, wherein the transmitting coil is an inner cylinder coil, the receiving coil is an outer cylinder coil, and the detecting coil is located right above or right below the receiving coil.
4. The underground wireless energy communication system of claim 3, wherein the transmitting coil, the receiving coil and the detecting coil are wound by litz wires with the same wire diameter, the number of turns of the transmitting coil and the receiving coil is the same, and the number of turns of the detecting coil is not more than one tenth of the number of turns of the transmitting coil and the receiving coil.
5. The underground wireless energy communication system of claim 4, wherein the transmitting coil, the receiving coil and the detecting coil are all resonance-compensated by adopting series compensation capacitors.
6. The underground wireless energy communication system of claim 5, wherein the secondary side offset detection circuit is further provided with a series detection resistor, and the voltage of the series detection resistor is the detection voltage.
7. A downhole wireless energy co-transmission system according to any of claims 2-6, wherein the functional relationship between the detection voltage and the offset distance is expressed as: , Wherein, the Is a function of the different constants of the two, Which represents the detected voltage, and which represents the detected voltage, Representing the offset distance.
8. The method for detecting axial offset of a downhole wireless energy co-transmission system according to any one of claims 1 to 7, comprising the steps of: The secondary side communication circuit obtains the detection voltage of the secondary side offset detection circuit; And the secondary side communication circuit obtains the axial offset distance of the sleeve type coupling mechanism according to the received detection voltage and the relation between the preset detection voltage and the offset distance and sends the axial offset distance to the primary side communication circuit.
9. The method for detecting axial offset of a downhole wireless energy co-transmission system according to claim 8, wherein the relation between the detected voltage and the offset distance is determined by: acquiring detection voltages at different axial offset distances; And performing function fitting according to different axial offset distances and corresponding detection voltages to obtain a functional relation between the detection voltages and the offset distances.
10. The method for detecting axial offset of a downhole wireless energy co-transmission system according to claim 9, wherein the functional relationship between the detection voltage and the offset distance is expressed as: , Wherein, the Is a function of the different constants of the two, Which represents the detected voltage, and which represents the detected voltage, Representing the offset distance.

Description

Underground wireless energy information co-transmission system and axial deviation detection method thereof Technical Field The invention relates to the technical field of wireless power transmission, in particular to an underground wireless energy information co-transmission system and an axial deviation detection method thereof. Background Compared with the traditional wired charging mode, the wireless power transmission (Wireless Power Transfer, WPT) technology has the advantages of strong environmental adaptability, high safety, flexibility, convenience and the like, and is widely applied to the fields of transportation and the like. In WPT systems, the magnetic coupling mechanism is used as a core for energy transmission, and the offset determines the efficiency, power and other output characteristics of the system to a great extent. In the underground wireless power supply system, due to the problems of external force, precision and the like, the pick-up coil of the WPT system can be deviated, when the deviation occurs between the secondary side receiving coil and the primary side transmitting coil, the coupling between the coils is reduced compared with the coupling between the secondary side receiving coil and the primary side transmitting coil when the secondary side receiving coil and the primary side transmitting coil are aligned, and the problems of reduced output power and transmission efficiency of the system and the like are caused. Disclosure of Invention The invention aims to provide an underground wireless energy communication and transmission system and an axial deviation detection method thereof, which are used for solving the technical problem that in the prior art, the power and efficiency are reduced due to deviation in an underground wireless power supply system. The preferred technical solutions of the technical solutions provided by the present invention can produce a plurality of technical effects described below. In order to achieve the above purpose, the present invention provides the following technical solutions: The invention provides an underground wireless energy communication system, which comprises a transmitting coil, a primary side main circuit and a primary side communication circuit which are connected with the transmitting coil, a receiving coil, a secondary side main circuit and a secondary side communication circuit which are connected with the receiving coil, a detecting coil and a secondary side offset detecting circuit which is connected with the detecting coil, wherein the secondary side offset detecting circuit is also connected with the secondary side communication circuit; The transmitting coil, the receiving coil and the detecting coil are of a cylindrical structure, and the detecting coil and the receiving coil are arranged up and down and have fixed distance to form a sleeve type coupling mechanism together with the transmitting coil; the secondary side communication circuit obtains the detection voltage of the secondary side offset detection circuit, obtains the axial offset distance of the sleeve type coupling mechanism according to the detection voltage and the relation between the preset detection voltage and the offset distance, and sends the axial offset distance to the primary side communication circuit. Preferably, the relation between the detection voltage and the offset distance is determined by: acquiring detection voltages at different axial offset distances; And performing function fitting according to different axial offset distances and corresponding detection voltages to obtain a functional relation between the detection voltages and the offset distances. Preferably, the transmitting coil is used as an inner cylinder coil, the receiving coil is used as an outer cylinder coil, and the detecting coil is located right above or right below the receiving coil. Preferably, the transmitting coil, the receiving coil and the detecting coil are wound by litz wires with the same wire diameter, the turns of the transmitting coil and the receiving coil are the same, and the turns of the detecting coil are not more than one tenth of the turns of the transmitting coil and the receiving coil. Preferably, the transmitting coil, the receiving coil and the detecting coil all adopt series compensation capacitors for resonance compensation. Preferably, the secondary side offset detection circuit is further provided with a series detection resistor, and the voltage of the series detection resistor is the detection voltage. Preferably, the functional relationship between the detection voltage and the offset distance is expressed as: , Wherein, the Is a function of the different constants of the two,Which represents the detected voltage, and which represents the detected voltage,Representing the offset distance. The invention also provides an axial deviation detection method of the underground wireless energy communication system, which is characterized by compr