CN214337903U - Underwater omnidirectional magnetic induction communication circuit - Google Patents
Underwater omnidirectional magnetic induction communication circuit Download PDFInfo
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- CN214337903U CN214337903U CN202120555179.2U CN202120555179U CN214337903U CN 214337903 U CN214337903 U CN 214337903U CN 202120555179 U CN202120555179 U CN 202120555179U CN 214337903 U CN214337903 U CN 214337903U
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- 230000006698 induction Effects 0.000 title claims abstract description 93
- 230000006854 communication Effects 0.000 title claims abstract description 59
- 238000004891 communication Methods 0.000 title claims abstract description 59
- 238000004804 winding Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 238000012544 monitoring process Methods 0.000 abstract description 5
- 238000012806 monitoring device Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007175 bidirectional communication Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The utility model discloses an omnidirectional magnetic induction communication circuit under water, including magnetic induction coil and omnidirectional magnetic induction receiving and transmitting circuit. The magnetic induction coils are composed of three mutually orthogonal magnetic induction sub-coils and are used in pairs; the omnidirectional magnetic induction receiving and transmitting circuit is arranged in the waterproof sealed cabin and comprises a clock circuit, an external interface, a low-power-consumption processor, a modulation and demodulation circuit, a multi-path analog switch and a receiving and transmitting change-over switch. The low-power consumption processor is in signal connection with the clock circuit, the external interface and the modulation and demodulation circuit, the multi-path analog switch is in signal connection with the modulation and demodulation circuit and the receiving and transmitting switch, and the receiving and transmitting switch is in signal connection with the magnetic induction coil. The utility model avoids the problem that the traditional magnetic induction communication can only be used on the premise of direction alignment, realizes the underwater medium-distance non-directional communication, and realizes the underwater medium-short distance two-way communication with low cost; the underwater environment monitoring device is suitable for various underwater environment monitoring fields and has wide application prospect.
Description
Technical Field
The utility model belongs to the technical field of magnetic induction communication, concretely relates to utilize magnetic induction communication circuit of qxcomm technology under water of three-dimensional quadrature magnetic induction coil realization.
Background
With the continuous development of the demands of marine environment protection, marine resource exploration and the like, high and new technologies in the marine field are deeply researched gradually. Development of a series of underwater information technologies such as underwater sensing data collection, natural disaster early warning, ecological environment monitoring, underwater robot navigation and the like, a medium-short distance communication method capable of realizing underwater omnidirectional communication is urgently needed. Taking an underwater sensor network with wider application as an example, in the marine environment monitoring application with more densely distributed nodes, the underwater high-efficiency communication technology can not only improve the environment monitoring efficiency, but also greatly reduce the power consumption of the sensor network in information transmission. At present, underwater communication is mainly underwater acoustic communication, the underwater acoustic communication distance is large, but the underwater acoustic communication has the defects of small bandwidth, large delay, obvious multipath effect and the like, and particularly faces the problems of high price and the like, so that the underwater acoustic communication is not suitable for medium-short distance underwater application occasions. Another feasible method is underwater optical communication, which mainly includes LED optical communication and laser communication, and the underwater optical communication has a large communication bandwidth, but can only be applied to a clear water environment with high visibility, and a precise angle alignment method is required. The definition of the water body in a general scene is difficult to meet the requirement, so the application range of underwater optical communication is very limited. As a novel underwater communication mode, underwater three-dimensional omnidirectional magnetic induction communication not only solves the problems of high price and the like of underwater acoustic communication, but also effectively solves the problem that underwater optical communication seriously depends on the alignment direction. The communication quality of the conventional magnetic induction can be optimal when the communication transceiving coils are perpendicular to the same central axis, and reliable communication in any direction cannot be realized.
Disclosure of Invention
To the technical problem, the utility model discloses utilize three-dimensional qxcomm technology magnetic induction coil's magnetic induction intensity rather than the geometric relation of position and angle, provided an omnidirectional magnetic induction communication circuit under water based on three-dimensional orthogonal coil to guarantee that receiving and dispatching coil can both obtain better response magnetic flux in any position, provide technical support for obtaining better communication link of magnetic induction quality under water.
The specific technical scheme is as follows:
the underwater omnidirectional magnetic induction communication circuit comprises a magnetic induction coil and an omnidirectional magnetic induction receiving and generating circuit, wherein the magnetic induction coil consists of three mutually orthogonal magnetic induction sub-coils which are used in pairs; the omnidirectional magnetic induction transceiver circuit comprises a clock circuit, an external interface, a low-power-consumption processor, a modulation and demodulation circuit, a multi-path analog switch and a transceiver switch; the low-power-consumption processor is in signal connection with the clock circuit, the external interface and the modulation and demodulation circuit, the modulation and demodulation circuit is in signal connection with the multi-path analog switch, the multi-path analog switch is in signal connection with the receiving and transmitting switch, and the receiving and transmitting switch is in signal connection with the magnetic induction coil; the omnidirectional magnetic induction receiving and transmitting circuit is arranged in the waterproof sealed cabin.
Furthermore, the magnetic induction coils are formed by winding waterproof enameled wires with the diameter of 10cm, the number of the windings of each coil is 20, and the magnetic induction coils are connected with the sealed cabin of the omnidirectional magnetic induction receiving and generating circuit through the watertight parts.
Furthermore, the clock circuit adopts a PCF8523 chip.
Furthermore, the external interface adopts an RS-232 interface.
Furthermore, the low-power processor adopts an STM32L series low-power single chip microcomputer.
Furthermore, the multi-path analog switch adopts an ADG333A chip which can realize the switching of the working modes of the three-path magnetic induction coil.
Furthermore, the modulation chip of the modulation and demodulation circuit selects ATA5276, the demodulation chip selects AS3933, and the ASK carrier frequency is 125 KHz.
Furthermore, the receiving and transmitting switch adopts a quick response relay which is responsible for switching receiving and transmitting states.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the underwater omnidirectional communication is realized by adopting the three orthogonal induction coils, the problem that the traditional magnetic induction communication can be used only on the premise of direction alignment is solved, and the underwater medium-distance non-directional communication is realized.
(2) The utility model has low cost, compared with the current underwater communication mode, the price is reduced by dozens of times, and the bidirectional communication of about ten meters underwater is realized with extremely low cost; can be well applied to various current underwater environment monitoring fields, and has wide application prospect.
Drawings
Fig. 1 is a schematic view of the application of the present invention;
fig. 2 is a block diagram of the omnidirectional magnetic induction transceiver circuit function module of the present invention;
fig. 3 is a schematic diagram of the magnetic induction resonance formed by the transceiver coil of the present invention.
Detailed Description
The technical solution of the present invention will be further explained with reference to the accompanying drawings.
The utility model discloses an omnidirectional magnetic induction communication circuit under water mainly comprises three routes magnetic induction coil and the omnidirectional magnetic induction receiving and transmitting circuit of quadrature of each other, and the circuit passes through connector signal connection with the magnetic induction coil of three routes quadrature of each other. The omnidirectional magnetic induction receiving and transmitting circuit comprises an omnidirectional magnetic induction transmitting circuit and an omnidirectional magnetic induction receiving circuit, the omnidirectional magnetic induction transmitting circuit and the omnidirectional magnetic induction receiving circuit are placed in the waterproof sealed cabin, the three-dimensional orthogonal transmitting coil and the three-dimensional orthogonal receiving coil are formed by winding waterproof enameled wires, and the three-dimensional orthogonal transmitting coil and the three-dimensional orthogonal receiving coil are connected with the cabin of the omnidirectional magnetic induction transmitting circuit and the omnidirectional magnetic induction receiving circuit through the watertight part.
As shown in fig. 1, induction coils a, b, c represent sub-coils of the magnetic induction transmitter coil perpendicular to the z, y, x axes, respectively, and coil A, B, C represents a sub-coil of the magnetic induction receiver coil perpendicular to the z, y, x axes; b is1、B2、B3The magnetic induction intensities induced by the sub-coils A, B, C of the respective induction nodes; r represents the distance between the sensing node and the transmitting node.
Three routes magnetic induction transmitting coil a, b, c of quadrature of each other be source signal coil, produce two liang of mutual orthogonal distribution magnetic fields in three-dimensional space in proper order, again by the three-dimensional quadrature magnetic induction receiving coil A, B, C at a distance of R induction not equidirectional magnetic induction respectively, finally obtain the data signal the same with source signal coil. The reverse is also possible.
The relation formula of the distance R and the magnetic field intensity B is as follows:
wherein u is0The magnetic permeability is N, the number of turns is N, R is the radius of the induction coil, I is the current passing through the induction coil, R is the distance from the center of the coil to the measured point, and I is the distance in the directions of x, y and z. And solving the magnetic field intensity in the x, y and z directions, and calculating the final magnetic field intensity by vector addition.
As shown in fig. 2, the underwater omnidirectional magnetic induction communication circuit's functional module mainly includes: the device comprises a clock circuit, an external interface, a low-power-consumption processor, a modulation circuit, a demodulation circuit, two paths of multi-path analog switches, a receiving and transmitting switch and a magnetic induction coil. The low-power-consumption processor is respectively in signal connection with the clock circuit, the external interface, the modulation circuit and the demodulation circuit are respectively in signal connection with the two paths of multi-path analog switches, the two paths of multi-path analog switches are respectively in signal connection with the receiving and transmitting switch, and the receiving and transmitting switch is in signal connection with the magnetic induction coils A, B, C or a, b and c.
The three orthogonal magnetic induction coils are formed by winding enameled wires with the diameter of 10cm, and the number of the windings of each coil is 20. The clock circuit adopts a PCF8523 chip to provide accurate time information for the whole system; the external interface adopts a standard RS-232 interface to input and output communication data; the low-power processor adopts an STM32L series low-power singlechip and is responsible for the operation of the whole system; the two-way multi-path analog switch adopts an ADG333A chip to realize the working mode switching of the three-way magnetic induction coil; the modulation circuit and the demodulation circuit are responsible for modulating and demodulating ASK signals, the ASK carrier frequency is 125KHz, the ATA5276 is selected AS a modulation chip, and the AS3933 is selected AS a demodulation chip. The receiving and transmitting switch adopts a quick relay and is mainly responsible for switching receiving and transmitting states. The power supply circuit reduces the voltage of the 3.7V lithium battery to 3.3V, and increases the voltage to 5V and 12V, and power is provided for each circuit module respectively. The magnetic induction resonance principle of the underwater transceiving coil is shown in fig. 3, the left side is an omnidirectional magnetic induction transmitting circuit, and a series resonance circuit is adopted; the right side is the omni-directional magnetic induction receiving circuit, using a parallel resonant circuit, where L is 345uH, C is 4.7nF, the resonant frequency f is 125kHz, and the coil diameter is set to 10 cm.
The underwater omnidirectional magnetic induction communication circuit is used in pairs, and the working principle is as follows: the underwater omnidirectional magnetic induction communication circuit at the transmitting end receives sensor data or instructions from an external interface and then transmits the sensor data or instructions to the low-power-consumption processor, and the low-power-consumption processor triggers the modulation circuit, the multi-path analog switch and the receiving and transmitting switch, modulates the data and then transmits the modulated data to the induction coils a, b and c. The induction coil A, B, C induction data of the underwater omnidirectional magnetic induction communication circuit at the receiving end is transmitted to the receiving-transmitting change-over switch, the multi-path analog switch and the demodulation circuit, the demodulated signal is output to the low-power processor, and data output is carried out through an external interface. The principle of reverse communication is the same as described above, and thus bidirectional half-duplex communication can be achieved.
Compared with the prior art, the utility model provides an adopt three orthogonal induction coil's novel underwater magnetic induction communication method, the non-direction influence only considers the optimal condition, and two coils are the same size promptly, and just when being totally just to the time, then y ═ R, formula 1 simplifies this moment, and the relation is as follows:
the underwater two-way communication with a medium distance of about 10 meters is realized at extremely low cost, and the problem that the traditional magnetic induction communication can be communicated only by depending on direction alignment is solved. The technical indexes that can be achieved are as follows: communication rate: 1200 bps; communication distance: not less than 10 m; omni-directional communication channel: three channels; communication error rate: <1 e-5.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all the modifications and equivalents of the technical spirit of the present invention to any simple modifications of the above embodiments are within the scope of the technical solution of the present invention.
Claims (8)
1. The underwater omnidirectional magnetic induction communication circuit comprises a magnetic induction coil and an omnidirectional magnetic induction receiving and transmitting circuit, and is characterized in that:
the magnetic induction coils consist of three mutually orthogonal magnetic induction sub-coils and are used in pairs;
the omnidirectional magnetic induction transceiver circuit comprises a clock circuit, an external interface, a low-power-consumption processor, a modulation and demodulation circuit, a multi-path analog switch and a transceiver switch; the low-power-consumption processor is in signal connection with the clock circuit, the external interface and the modulation and demodulation circuit, the modulation and demodulation circuit is in signal connection with the multi-path analog switch, the multi-path analog switch is in signal connection with the receiving and transmitting switch, and the receiving and transmitting switch is in signal connection with the magnetic induction coil;
the omnidirectional magnetic induction receiving and transmitting circuit is arranged in the waterproof sealed cabin.
2. The underwater omnidirectional magnetic induction communication circuit of claim 1, wherein: the magnetic induction coils are formed by winding waterproof enameled wires with the diameter of 10cm, the number of the windings of each coil is 20, and the magnetic induction coils are connected with a sealed cabin of the omnidirectional magnetic induction receiving and generating circuit through a watertight part.
3. The underwater omnidirectional magnetic induction communication circuit of claim 1, wherein: the clock circuit adopts a PCF8523 chip.
4. The underwater omnidirectional magnetic induction communication circuit of claim 1, wherein: the external interface adopts an RS-232 interface.
5. The underwater omnidirectional magnetic induction communication circuit of claim 1, wherein: the low-power processor adopts STM32L series low-power consumption singlechip.
6. The underwater omnidirectional magnetic induction communication circuit of claim 1, wherein: the multi-path analog switch adopts an ADG333A chip which can realize the switching of the working modes of the three-path magnetic induction coil.
7. The underwater omnidirectional magnetic induction communication circuit of claim 1, wherein: the modulation chip of the modulation and demodulation circuit selects ATA5276, the demodulation chip selects AS3933, and the ASK carrier frequency is 125 KHz.
8. The underwater omnidirectional magnetic induction communication circuit of claim 1, wherein: the receiving and transmitting switch adopts a quick response relay which is responsible for switching receiving and transmitting states.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120555179.2U CN214337903U (en) | 2021-03-18 | 2021-03-18 | Underwater omnidirectional magnetic induction communication circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120555179.2U CN214337903U (en) | 2021-03-18 | 2021-03-18 | Underwater omnidirectional magnetic induction communication circuit |
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| CN214337903U true CN214337903U (en) | 2021-10-01 |
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| CN202120555179.2U Expired - Fee Related CN214337903U (en) | 2021-03-18 | 2021-03-18 | Underwater omnidirectional magnetic induction communication circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114650084A (en) * | 2022-04-06 | 2022-06-21 | 浙江大学 | Underwater magnetic induction communication omnidirectional receiving and transmitting antenna circuit and circuit parameter design method |
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2021
- 2021-03-18 CN CN202120555179.2U patent/CN214337903U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114650084A (en) * | 2022-04-06 | 2022-06-21 | 浙江大学 | Underwater magnetic induction communication omnidirectional receiving and transmitting antenna circuit and circuit parameter design method |
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