Wireless simultaneous interpretation system with switchable working modes

Abstract

In order to overcome the problem that the existing underwater wireless signal transmission system cannot adapt to underwater equipment with different power supply requirements and command update requirements, the present invention proposes a wireless signal transmission system with switchable working modes. The primary side coil in the present invention is composed of N primary side sub-coils with the same structural parameters that are coaxial and layered. Correspondingly, the primary side power compensation circuit is composed of N-1 primary side power compensation sub-circuits. By controlling and changing the function of the primary side sub-coil and selecting the corresponding primary side power compensation sub-circuit, the power transmission power and information transmission rate are changed, so as to achieve a working mode that adopts different power transmission powers and information transmission rates according to the different needs of underwater equipment, prevent serious overflow of information transmission rate and the occurrence of too slow charging speed, so that the output power of the underwater charging base station can be effectively utilized to the greatest extent, and improve the overall efficiency of power supply and command update of underwater equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical communications. Background Art

[0002] As underwater equipment such as AUV (autonomous underwater vehicle), underwater mining robots, and underwater detection robots play an increasingly important role in ocean exploration, the endurance of underwater equipment has gradually become one of the key constraints on its work. In view of the special working environment and requirements of underwater equipment, building an underwater wireless charging system based on underwater charging base stations can enhance the working time of underwater equipment. In order to ensure the controllability and stability of the charging process, and to increase the interaction between underwater equipment and underwater charging base stations, underwater signal and energy simultaneous transmission technology has become an inevitable trend of development.

[0003] The charging and communication capabilities in the underwater signal-energy simultaneous transmission technology only work at close range. When the underwater equipment in operation receives a far-field command from the land base station (the far-field command requires it to return to the underwater charging base station for power replenishment and command update), the underwater equipment will return to the underwater charging base station and send a request command to the underwater charging base station. After receiving the request command, the underwater charging base station will update the underwater equipment with information such as power replenishment and task instructions through the underwater wireless signal-energy simultaneous transmission system. However, the underwater wireless signal-energy simultaneous transmission system currently installed on the underwater charging base station can only work with a preset, fixed power transmission power (charging power) and information transmission rate (communication rate). When facing underwater equipment of different types and different tasks, the fixed power transmission power and information transmission rate are often unsatisfactory. For example, for underwater mining robots with mining functions and underwater detection robots whose main task is exploration, it is obvious that underwater mining robots pay more attention to underwater power replenishment, while underwater detection robots pay more attention to underwater information interaction. When these two underwater robots return to the underwater charging base station, the underwater mining robot needs to update relatively simple instructions, which often only involve the update of the mining area and mining path. In the process of the underwater charging base station supplying power and updating instructions through the existing underwater wireless signal energy simultaneous transmission system, it is very likely to face serious overflow of information transmission rate and insufficient power supply, resulting in the communication function of the underwater signal energy simultaneous transmission system being idle for too long after the instruction is updated and just waiting for the completion of power supply. For underwater detection robots, it is possible to face serious overflow of power supply, resulting in the update of instructions not being completed after the power supply is completed, and the power supply function of the underwater signal energy simultaneous transmission system being idle for too long. It can be seen from this that the existing underwater signal energy simultaneous transmission system cannot adapt to underwater equipment with different power supply needs and instruction update needs, and the functions of the underwater signal energy simultaneous transmission system cannot be efficiently utilized, resulting in the extension of the entire power supply and instruction update cycle, which reduces the overall efficiency of power supply and instruction update of underwater equipment. Summary of the invention

[0004] In order to overcome the technical problem that the existing underwater wireless signal and energy simultaneous transmission system cannot adapt to underwater equipment with different power supply requirements and command update requirements, the present invention proposes a wireless signal and energy simultaneous transmission system with switchable working modes.

[0005] The technical solution adopted by the present invention is:

[0006] A wireless signal-energy simultaneous transmission system with switchable working modes comprises a primary side circuit and a secondary side circuit; the primary side circuit comprises a high-frequency inverter, a signal generator and a primary side communication compensation circuit;

[0007] Its special features are:

[0008] The wireless signal energy simultaneous transmission system also includes a control unit;

[0009] The primary side circuit also includes a primary side coil, a primary side electric energy compensation circuit and a relay;

[0010] The primary side coil includes N primary side sub-coils with the same structural parameters, coaxial and layered arrangement;

[0011] The primary side power compensation circuit is used to put the power transmission part in the primary side circuit into a resonant state;

[0012] The relay is controlled by the control unit:

[0013] Through the action of the relay, the power carrier output by the high-frequency inverter is injected into the adjacent m primary-side sub-coils through the primary-side power compensation circuit, so that they serve as charging coils;

[0014] Through the action of the relay, the information carrier output by the signal generator and compensated by the primary side communication compensation circuit is injected into the remaining adjacent Nm primary side sub-coils through the primary side power compensation circuit, so that they serve as communication coils;

[0015] 1≤m<N, N≥3;

[0016] The method for determining m is as follows: the value obtained by rounding up the quotient of the electric energy supply power required by the underwater equipment divided by the electric energy supply power of a single primary side sub-coil is m; if the calculated value of m is greater than N, set m=N-1;

[0017] The working mode switching of the N primary side sub-coils is controlled by relays, and the primary side circuit can realize N-1 working modes;

[0018] The primary side power compensation circuit comprises N-1 primary side power compensation sub-circuits, which are respectively used to put the power transmission part of the primary side circuit into a resonant state in the N-1 working modes.

[0019] Furthermore, the charging coil is closer to the underwater charging base station side, and the communication coil is closer to the underwater equipment side.

[0020] Further, N primary-side sub-coils are connected in parallel.

[0021] Further, if Nm≥2, the information carrier is injected into Nm primary-side sub-coils at different carrier frequencies.

[0022] Furthermore, the primary side circuit also includes a DC-DC conversion module, the input end of the DC-DC conversion module is connected to the underwater charging base station, and the output end of the DC-DC conversion module is connected to the input end of the high-frequency inverter.

[0023] Furthermore, the control unit is integrated in a base station control cabin of the underwater charging base station.

[0024] Furthermore, the secondary side circuit includes a secondary side coil, a secondary side power compensation circuit, a rectifier, a battery charger, a filter circuit and a secondary side communication compensation circuit.

[0025] The advantages of the present invention are:

[0026] 1. The primary side coil in the wireless signal transmission system of the present invention is composed of N primary side sub-coils with the same structural parameters which are coaxially and layered. Correspondingly, the primary side power compensation circuit is composed of N-1 primary side power compensation sub-circuits. By controlling and changing the functions of the primary side sub-coils and selecting the corresponding primary side power compensation sub-circuits, the proportion of the primary side power transmission channel and the information transmission channel can be changed, thereby changing the power transmission power and information transmission rate in the wireless signal transmission process, so as to achieve working modes with different power transmission powers and information transmission rates according to different requirements of underwater equipment, prevent serious overflow of information transmission rate and excessively slow charging speed, so that the output power of the underwater charging base station can be effectively utilized to the greatest extent, thereby improving the overall efficiency of power supply and command update of underwater equipment.

[0027] 2. The present invention adopts a frequency division multiplexing method. When there are multiple primary side sub-coils as communication coils, the information carrier is injected into these primary side sub-coils at different carrier frequencies, so that the information carriers of different channels are transmitted at different frequencies, thereby achieving the purpose of reducing crosstalk.

[0028] 3. In the present invention, the primary side sub-coils constituting the primary side coil are connected in parallel, so that the inductance value of the primary side circuit fluctuates less when the working mode is switched, and thus there is no need to change the carrier frequency to a large extent to maintain the waveform stability. The small range of carrier frequency adjustment (change) reduces the difficulty of designing the filter circuit in the secondary side circuit.

[0029] 4. The present invention can realize the dynamic allocation of power transmission power and information transmission rate according to the different power supply power requirements and command update requirements of underwater equipment by only improving the primary side circuit located at the underwater charging base station, without improving the secondary side circuit located at the underwater equipment side. Therefore, no change is required on the underwater equipment side, and the weight and volume of the underwater equipment will not be further increased. The strict requirements on weight and size of the technical indicators of long flight time and long range of underwater equipment can be met. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the principle of the wireless signal energy simultaneous transmission system of the present invention (taking the charging of the aircraft battery pack as an example).

[0031] Figure 2 This is an example of the structure of the primary side coil in the wireless signal transmission system of the present invention. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0033] like Figure 1-2 As shown, the wireless signal transmission system with switchable working modes provided by the present invention includes a primary side circuit and a secondary side circuit.

[0034] The primary side circuit includes a high-frequency inverter, a primary side coil, a primary side power compensation circuit, a relay, a signal generator, a primary side communication compensation circuit and a control unit (not shown in the figure). When the underwater charging base station is not equipped with a DC-DC conversion module, the primary side circuit also includes a DC-DC conversion module.

[0035] The high-frequency inverter is used to convert the direct current output by the DC-DC conversion module into high-frequency alternating current.

[0036] The primary side coil includes N primary side sub-coils with the same structural parameters; the N primary side sub-coils are coaxially and layeredly arranged and connected in parallel in the primary side circuit; N≥3.

[0037] The primary side power compensation circuit is used to put the power transmission part (energy transfer part) in the primary side circuit into a resonant state.

[0038] The relay is controlled by the control unit to switch the working mode of the primary side sub-coil. Preferably, the control unit can be integrated in the base station control cabin of the underwater charging base station.

[0039] The signal generator is used to convert the binary code sent by the underwater charging base station into an information carrier.

[0040] The primary-side communication compensation circuit is used to put the information transmission part (communication part) of the primary-side circuit in a resonant state.

[0041] The relay is controlled by the control unit. Through the control of the relay, it can be achieved that: the power carrier output by the high-frequency inverter is injected into the adjacent m primary side sub-coils closer to the underwater charging base station through the primary side power compensation circuit to make them serve as charging coils; the information carrier output by the signal generator and compensated by the primary side communication compensation circuit is injected into the remaining Nm adjacent primary side sub-coils through the primary side power compensation circuit to make them serve as communication coils; therefore, the number of charging coils and communication coils can be adjusted through the switching control of the relay, thereby achieving the adjustment of the total power of power transmission and the total rate of information transmission to adapt to underwater equipment with different power supply requirements and instruction update requirements. Through the switching control of the primary side sub-coils, when the number of primary side sub-coils used for power transmission is more, the total number of turns of the charging coil is more, the coupling coefficient is higher, the transmission power is greater, the magnetic field energy of the primary side is stronger, so that the power that can be obtained by the secondary side is greater, and the power of power transmission is higher. When the number of primary side sub-coils used for information transmission is more, the more information transmission paths there are, and the higher the information transmission rate is. Preferably, when there are multiple primary side sub-coils used as communication coils, the present invention can use different carrier frequencies for different primary side sub-coils when injecting information carriers into these primary side sub-coils, that is, use frequency division multiplexing to achieve the purpose of reducing crosstalk.

[0042] The N primary side sub-coils in the wireless signal and energy simultaneous transmission system of the present invention are regarded as an integral primary side coil. Through the above switching process of the primary side sub-coils, it can be known that the wireless signal and energy simultaneous transmission system of the present invention has N-1 working modes. The equivalent parameters of the overall primary side coil in different working modes must be different. Therefore, it is necessary to match the required power compensation parameters for each working mode, so that the power transmission part of the primary side circuit can form a resonant state in each working mode to achieve the maximum charging efficiency. Therefore, the primary side power compensation circuit of the present invention includes N-1 primary side power compensation sub-circuits, and these N-1 primary side power compensation sub-circuits correspond one-to-one to the N-1 working modes, and these N-1 primary side power compensation sub-circuits are all connected to the high-frequency inverter, the primary side communication compensation circuit and the relay. Before charging, the control unit integrated in the base station control cabin of the underwater charging base station calculates the required number of charging coils and communication coils according to the request instruction received from the underwater equipment (the request instruction contains the power demand for electric energy replenishment and the information transmission rate demand), and then sends a control instruction to the relay to activate the relay. Through the relay switching control, the electric energy carrier output by the high-frequency inverter is injected into the corresponding primary side sub-coil through the corresponding primary side electric energy compensation sub-circuit, so that the information carrier output by the signal generator and compensated by the primary side communication compensation circuit is injected into the corresponding primary side sub-coil through the corresponding primary side electric energy compensation sub-circuit, realizing the switching of N-1 working modes. The implementation method of the control unit and the single primary side electric energy compensation sub-circuit in the present invention is an existing conventional method, which will not be repeated here.

[0043] In the present invention, 1≤m<N, and the present invention gives priority to the power demand for electric energy replenishment, m is specifically determined according to the power demand for electric energy replenishment of the underwater equipment, and the value obtained by rounding up the quotient obtained by dividing the power supply power required by the underwater equipment by the power supply power of a single primary side sub-coil is m. Considering the actual application, there may be a situation where the power demand for electric energy replenishment overflows the transmission upper limit of the underwater wireless signal transmission system of the present invention, and the calculated m is greater than N at this time. In view of this situation, the present invention sets in the control unit: when the calculated m is greater than N, let m=N-1, that is, at this time, only one of the primary side sub-coils is injected with an information carrier to use it as a communication coil, and the remaining primary side sub-coils are used as charging coils.

[0044] When the present invention uses relays to control the information carrier injection and the power carrier injection into the primary side sub-coil, the power carrier is injected into the adjacent m primary side sub-coils and set them as charging coils, and the information carrier is injected into the remaining Nm adjacent primary side sub-coils and set them as communication coils. This is because if the communication coil and the charging coil are arranged alternately, a bidirectional current will be induced in the coil to produce more complex crosstalk; and this setting method of the present invention will reduce this crosstalk and reduce the workload of subsequent crosstalk removal.

[0045] Furthermore, the present invention takes into account the information transmission path and interference. If the information carrier is injected into the adjacent Nm primary side sub-coils closer to the underwater charging base station side to make them serve as communication coils, the transmission path of the information carrier is: signal generator-primary side communication compensation circuit-primary side electric energy compensation sub-circuit-communication coil-charging coil-secondary side coil. At this time, the transmission path of the information carrier is longer and will be more interfered by the charging coil. Therefore, the present invention chooses to use the adjacent Nm primary side sub-coils closer to the secondary side as communication coils during control. At this time, the transmission path of the information carrier is: signal generator-primary side communication compensation circuit-primary side electric energy compensation sub-circuit-communication coil-secondary side coil. At this time, the transmission path of the information carrier is shorter and the interference from the charging coil is relatively small.

[0046] The secondary side circuit includes a secondary side coil, a secondary side electric energy compensation circuit, a rectifier, a battery charger, a filter circuit and a secondary side communication compensation circuit.

[0047] The secondary side coil is coupled to the primary side coil, and an induced current is generated under the excitation of the alternating magnetic field generated by the primary side coil, thereby realizing the transmission of electric energy and information from the primary side to the secondary side.

[0048] The secondary side power compensation circuit is used to put the power transmission part (energy transfer part) in the secondary side circuit into a resonant state.

[0049] The rectifier is used to convert the induced current generated by the secondary side coil into direct current.

[0050] The battery charger is used to convert the direct current into the voltage required for charging the underwater equipment battery pack (such as the aircraft battery pack).

[0051] The filter circuit is used to filter the information carrier received by the secondary side coil to achieve accurate decoding of the communication information.

[0052] The secondary-side communication compensation circuit is used to put the information transmission part (communication part) of the secondary-side circuit in a resonant state.

[0053] The implementation of the secondary side coil, the secondary side power compensation circuit, the rectifier, the battery charger, the filter circuit and the secondary side communication compensation circuit are all existing conventional methods and will not be described in detail here.

[0054] Example:

[0055] In this embodiment, the primary side coil includes three primary side sub-coils, and a single primary side sub-coil can achieve an electric energy supply power of 1kw and an information transmission rate of 500kbps.

[0056] If the power required for a certain type of AUV that needs to be replenished is 1780w, and the required information transmission rate is 400kbps, 1780 / 1000 is rounded up to 2, then the control unit sends a control instruction to the relay, and the relay performs switching control to inject power carriers into the two adjacent primary side sub-coils closer to the underwater charging base station to use them as charging coils, and inject information carriers into the remaining one primary side sub-coil to use it as a communication coil.

[0057] If the power replenishment power required by another type of AUV that needs to be replenished is 1780w, and the required information transmission rate is 900kbps, then 1780 / 1000 is rounded up to 2, and 900 / 500 is rounded up to 2, and a total of 4 primary side sub-coils are required; but in this embodiment, there are only 3 primary side sub-coils. At this time, the power replenishment demand is met first, and the control unit sends a control instruction to the relay to inject power carrier into the two adjacent primary side sub-coils closer to the underwater charging base station to use them as charging coils, and inject information carrier into the remaining 1 primary side sub-coil to use it as a communication coil.

Claims

1. A wireless signal-energy simultaneous transmission system with switchable working modes, comprising a primary side circuit and a secondary side circuit; the primary side circuit comprises a high-frequency inverter, a signal generator and a primary side communication compensation circuit; Features: The wireless signal energy simultaneous transmission system also includes a control unit; The primary side circuit also includes a primary side coil, a primary side electric energy compensation circuit and a relay; The primary side coil includes N primary side sub-coils with the same structural parameters, coaxial and layered arrangement; The primary side power compensation circuit is used to put the power transmission part in the primary side circuit into a resonant state; The relay is controlled by the control unit: Through the action of the relay, the power carrier output by the high-frequency inverter is injected into the adjacent m primary-side sub-coils through the primary-side power compensation circuit, so that they serve as charging coils; Through the action of the relay, the information carrier output by the signal generator and compensated by the primary side communication compensation circuit is injected into the remaining adjacent Nm primary side sub-coils through the primary side power compensation circuit, so that they serve as communication coils; 1≤m<N, N≥3; The method for determining m is as follows: the value obtained by rounding up the quotient of the electric energy supply power required by the underwater equipment divided by the electric energy supply power of a single primary side sub-coil is m; if the calculated value of m is greater than N, set m=N-1; The working mode switching of the N primary side sub-coils is controlled by relays, and the primary side circuit can realize N-1 working modes; The primary side power compensation circuit comprises N-1 primary side power compensation sub-circuits, which are respectively used to put the power transmission part of the primary side circuit into a resonant state in the N-1 working modes.

2. The wireless simultaneous transmission system with switchable working modes according to claim 1 is characterized in that: The charging coil is closer to the underwater charging base station, and the communication coil is closer to the underwater equipment.

3. The wireless simultaneous transmission system with switchable working modes according to claim 1 is characterized in that: N primary-side sub-coils are connected in parallel.

4. The wireless simultaneous transmission system with switchable working modes according to claim 1 is characterized in that: If Nm≥2, the information carrier is injected into the Nm primary-side sub-coils at different carrier frequencies.

5. The wireless simultaneous transmission system with switchable working modes according to any one of claims 1 to 4, characterized in that: The primary side circuit also includes a DC-DC conversion module, the input end of the DC-DC conversion module is connected to the underwater charging base station, and the output end of the DC-DC conversion module is connected to the input end of the high-frequency inverter.

6. The wireless simultaneous transmission system with switchable working modes according to claim 5 is characterized in that: The control unit is integrated in the base station control cabin of the underwater charging base station.

7. The wireless simultaneous transmission system with switchable working modes according to claim 4 is characterized in that: The secondary side circuit includes a secondary side coil, a secondary side electric energy compensation circuit, a rectifier, a battery charger, a filter circuit and a secondary side communication compensation circuit.

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