CN210380861U

CN210380861U - Wireless communication device

Info

Publication number: CN210380861U
Application number: CN201920807806.XU
Authority: CN
Inventors: 杨恒旭
Original assignee: Zhongke Xinsheng Suzhou Technology Co ltd
Current assignee: Zhongke Xinsheng Suzhou Technology Co ltd
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2020-04-21
Anticipated expiration: 2029-05-31

Abstract

The utility model discloses a wireless communication device, including at least one ultrasonic wave passageway, every the ultrasonic wave passageway is including setting up the first transducer and the connection in metal protective screen one side the first signal processing circuit of first transducer sets up the second transducer and the connection at the metal protective screen opposite side the second signal processing circuit of second transducer. The wireless communication device adopts ultrasonic waves which are not in the hearing range of human ears as an information conversion medium to pass through the metal barrier for information transmission, and information is transmitted at high speed without errors under the condition of not damaging the integrity of the metal barrier. The wireless communication device adopts the electromagnetic acoustic transducer to realize non-contact ultrasonic emission and reception with the metal barrier, so that the installation procedures of the wireless communication device are reduced, meanwhile, the rapid disassembly is realized, and the cost is reduced.

Description

Wireless communication device

Technical Field

The utility model relates to an ultrasonic transmission field, in particular to wireless communication device.

Background

In some industrial or military applications, it is necessary to transmit information through the outer shells of sealed metal tanks or containers (such as spacecraft, hyperbaric oxygen tanks, nuclear reaction devices, etc.), and the traditional wireless communication technology using electromagnetic waves as information carriers cannot be used due to the shielding effect of the metal shells of these tanks and containers. Currently, the most common and direct method is to punch holes on the outer shells of these metal cabins or containers for wired communication, which destroys the structural integrity of the metal outer shells, inevitably reduces the safety factor and increases the maintenance cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a wireless communication device utilizes the ultrasonic wave to pierce through the shell transmission information of the sealed metal cabin body and container effectively, realizes the high-speed transmission of being errorless of information under the condition of the shell integrality of the metal cabin body or container not destroyed.

In order to solve the technical problem, the technical scheme of the utility model is that:

a wireless communication device comprises at least one ultrasonic channel, wherein each ultrasonic channel comprises a first transducer arranged on one side of a metal barrier and a first signal processing circuit connected with the first transducer, and a second transducer arranged on the other side of the metal barrier and a second signal processing circuit connected with the second transducer.

Preferably, the first transducer is in direct contact with or has an air gap between them, and the second transducer is in direct contact with or has an air gap between them.

Preferably, a first impedance matching circuit is arranged between the first signal processing circuit and the first transducer, and a second impedance matching circuit is arranged between the second signal processing circuit and the second transducer.

Preferably, the first signal processing circuit includes a first Radio Frequency (RF) switch, a transmitting end signal processing circuit and at most one receiving end signal processing circuit, and one end of the first RF switch is electrically connected to the first impedance matching circuit, and the other end of the first RF switch is electrically connected to the transmitting end signal processing circuit and at most one receiving end signal processing circuit. The second signal processing circuit comprises a second radio frequency switch, a receiving end signal processing circuit and at most one transmitting end signal processing circuit, one end of the second radio frequency switch is electrically connected with the second impedance matching circuit, and the other end of the second radio frequency switch is electrically connected with the receiving end signal processing circuit and at most one transmitting end signal processing circuit.

Preferably, the transmitting end signal processing circuit comprises a first Field Programmable Gate Array (FPGA), a first digital-to-analog converter (DAC) and a Power Amplifier (PA), the first field programmable gate array, the first digital-to-analog converter, the power amplifier and the first radio frequency switch or the second radio frequency switch are electrically connected in sequence, a digital signal is selected as a signal source and is input into the first FPGA, the first FPGA codes, modulates, filters and the like the input signal, the output signal is converted into an analog signal by the first DAC, and the analog signal is output by the PA, the first RF switch or the second RF switch.

Preferably, when the signal source is an analog signal, the transmitting-end signal processing circuit further includes a first analog-to-digital converter (ADC), the first ADC is electrically connected to the first field programmable gate array, and when the analog signal is input, the analog signal is analog-to-digital converted into a digital signal by the first ADC, and then the digital signal is input to the first FPGA for encoding, modulating, filtering, and the like.

Preferably, the receiving end signal processing circuit includes an attenuator, a Low Noise Amplifier (LNA), a second analog/digital converter and a second field programmable gate array, the first radio frequency switch or the second radio frequency switch, the attenuator, the low noise amplifier, the second analog/digital converter and the second field programmable gate array are electrically connected in sequence, a signal is output to the attenuator, is adjusted to a proper amplitude by the attenuator and the LNA, is converted into a digital signal by the second ADC, and is sent to the second FPGA, and the signal processing circuit in the second FPGA performs processing such as filtering, synchronization, demodulation, equalization, decoding and the like on the signal, restores an original signal, and finally directly outputs the original signal in the form of the digital signal.

Preferably, the receiving-end signal processing circuit further comprises a second digital-to-analog converter, the second digital-to-analog converter is electrically connected with the second field programmable gate array, and digital signals output by the second FPGA are converted into analog signals through the second DAC and output.

Preferably, the first transducer and the second transducer both use electromagnetic acoustic transducers.

Preferably, the electromagnetic transducer includes a magnet having a static magnetic field direction perpendicular to a surface of the metal barrier, and a coil provided as a pancake coil.

Preferably, the electromagnetic transducer comprises a magnet and a coil, the active area of the coil being perpendicular to the magnetic field and parallel to the surface of the metallic barrier.

Compared with the prior art, the utility model has the advantages of it is following: wireless communication device adopts the ultrasonic wave not in the human ear hearing scope to pass through the metal barrier as information conversion media and is used for information transfer, realizes under the condition that does not destroy metal barrier integrality, the high-speed errorless transmission of information. The wireless communication device adopts the electromagnetic acoustic transducer to realize non-contact ultrasonic emission and reception with the metal barrier, so that the installation procedures of the wireless communication device are reduced, meanwhile, the rapid disassembly is realized, and the cost is reduced.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for helping the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. The skilled person in the art can, under the teaching of the present invention, choose various possible shapes and proportional dimensions to implement the invention according to the specific situation. In the drawings:

fig. 1 is a schematic structural diagram of a wireless communication device according to a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of an electromagnetic acoustic transducer according to a first embodiment of the present invention;

fig. 3 is a schematic structural diagram of a wireless communication device according to a second embodiment of the present invention.

Shown in the figure: 1. a metal barrier; 2. a first transducer; 21. a magnet; 22. a coil; 3. a second transducer; 41. a first analog/digital converter; 42. a first field programmable gate array; 43. a first digital-to-analog converter; 44. a power amplifier; 52. an attenuator; 53. a low noise amplifier; 54. a second analog/digital converter; 55. a second field programmable gate array; 56. a second digital-to-analog converter; 6. a first impedance matching circuit; 7. a second impedance matching circuit; 8. a first radio frequency switch; 9. a second radio frequency switch.

Detailed Description

In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a single embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Example one

Referring to fig. 1 and 2, a wireless communication device comprises at least one ultrasonic channel, wherein each ultrasonic channel comprises a first transducer 2 arranged on one side of a metal barrier 1 and a first signal processing circuit connected with the first transducer 2, and a second transducer 3 arranged on the other side of the metal barrier and a second signal processing circuit connected with the second transducer 3. Compared with a system using a piezoelectric transducer, the electromagnetic type acoustic transducer does not need good coupling between the transducer and the metal barrier, installation procedures are reduced, quick disassembly is realized, and cost is reduced. The electromagnetic acoustic transducer includes a magnet 21 and a coil 22, and referring to fig. 2(a), the direction of the static magnetic field of the magnet 21 is perpendicular to the surface of the metal barrier 1, the coil 22 is provided as a flat coil, so that a radially polarized shear wave can be excited, and fig. 2(a) illustrates only the positions of the magnet and the coil, but does not limit the relative positions of the N-pole and the S-pole in the magnet, and referring to fig. 2(b), the effective region of the coil 22 is perpendicular to the magnetic field and parallel to the surface of the metal barrier 1, so that a linearly polarized longitudinal wave can be excited.

In order to reduce electrical reflections in the channel, on the one hand to increase the transmission efficiency in the channel and on the other hand to avoid damage to the first transducer 2 and the second transducer 3, impedance matching is required both when signals are input to the first transducer 2 and the second transducer 3, a first impedance matching circuit 6 is arranged between the first signal processing circuit and the first transducer 2, and a second impedance matching circuit 7 is arranged between the second signal processing circuit and the second transducer 3.

The first signal processing circuit comprises a first radio frequency switch 8, a transmitting end signal processing circuit and at most one receiving end signal processing circuit, one end of the first radio frequency switch 8 is electrically connected with the first impedance matching circuit 6, and the other end of the first radio frequency switch is electrically connected with the transmitting end signal processing circuit and at most one receiving end signal processing circuit. The second signal processing circuit comprises a second radio frequency switch 9, a receiving end signal processing circuit and at most one transmitting end signal processing circuit, one end of the second radio frequency switch 9 is electrically connected with the second impedance matching circuit 7, and the other end of the second radio frequency switch is electrically connected with the receiving end signal processing circuit and at most one transmitting end signal processing circuit. The first signal processing circuit and the second signal processing circuit are arranged correspondingly.

The transmitting end signal processing circuit comprises a first analog/digital converter 41, a first field programmable gate array 42, a first digital/analog converter 43 and a power amplifier 44, wherein the first analog/digital converter 41, the first field programmable gate array 42, the first digital/analog converter 43, the power amplifier 44 and the first radio frequency switch 8 or the second radio frequency switch 9 are electrically connected in sequence. The transmitting end source can be an analog signal or a digital signal. If the signal source is an analog signal, the signal is input to the first ADC 41, and after the analog signal is converted into a digital signal by the first ADC 41, the digital signal is input to the first FPGA 42. If the source is a digital signal, it is directly input to the first FPGA 42. After the digital signal is input into the first FPGA 42, the first FPGA 42 performs encoding, modulation, filtering, and the like, outputs the signal to the first DAC43 to be converted into an analog signal, generates maximum power output through the PA 44, and outputs the maximum power output through the first RF switch 8 or the second RF switch 9.

The receiving end signal processing circuit comprises an attenuator 52, a low noise amplifier 53, a second analog/digital converter 54, a second field programmable gate array 55 and a second digital/analog converter 56, wherein the first RF switch 8 or the second RF switch 9, the attenuator 52, the low noise amplifier 53, the second analog/digital converter 54, the second field programmable gate array 55 and the second digital/analog converter 56 are electrically connected in sequence. The signal is output to the attenuator 52 through the first RF switch 8 or the second RF switch 9, is adjusted to a proper amplitude through the attenuator 52 and the LNA 53, is converted into a digital signal through the second ADC 54, and is sent to the second FPGA 55, and the signal processing circuit in the second FPGA 55 performs processing such as filtering, synchronization, demodulation, equalization, decoding and the like on the signal, restores the original signal, and finally is directly output in the form of a digital signal. If the output signal is an analog signal, the output digital signal is converted into an analog signal by the second DAC 56.

Referring to fig. 1, the first signal processing circuit includes a transmitting end signal processing circuit and a receiving end signal processing circuit, and the first signal processing circuit and the second signal processing circuit are symmetrically distributed.

In the first signal processing circuit, the transmitting end signal processing circuit includes a first analog/digital converter 41, a first field programmable gate array 42, a first digital/analog converter 43 and a power amplifier 44 which are electrically connected in sequence, the power amplifier 44, a first radio frequency switch 8, a first impedance matching circuit 6 and a first transducer 2 are electrically connected in sequence, and the first field programmable gate array 42 controls the on-off of the first radio frequency switch 8. The receiving end signal processing circuit comprises an attenuator 52, a low noise amplifier 53, a second analog-to-digital converter 54, a second field programmable gate array 55 and a second digital-to-analog converter 56 which are electrically connected in sequence, wherein the attenuator 52, the first radio frequency switch 8, the first impedance matching circuit 6 and the first transducer 2 are electrically connected in sequence. The signal source is input into the first FPGA 42, the signal source is subjected to encoding, modulation, filtering and the like through the first FPGA 42, the output signal is transmitted to the first DAC43 to be converted into an analog signal, the maximum power output is generated through the PA 44, the first transducer 2 is driven after passing through the first RF switch 8 and the first impedance matching circuit 6, the first transducer 2 excites ultrasonic waves in the metal barrier under the excitation of the driving signal, the ultrasonic waves penetrate through the metal barrier and are captured and converted into electric signals by the second transducer 3, the electric signals are output to the second RF switch 9 through the second impedance matching circuit 7, and the original signal output is restored through the receiving end signal processing circuit. Similarly, a transmitting end signal processing circuit in the second signal processing circuit processes the signal source, and then the signal source passes through the second RF switch 9 and the second impedance matching circuit 7, and drives the second transducer 3, the second transducer 3 excites ultrasonic waves in the metal barrier under the excitation of the driving signal, the ultrasonic waves penetrate through the metal barrier, and then are captured and converted into electric signals by the first transducer 2, and the electric signals are output to the first RF switch 8 through the first impedance matching circuit 6, and are adjusted to appropriate amplitudes through the attenuator 52 and the LNA 53, and then are converted into digital signals through the second ADC 54 and sent to the second FPGA 55, and the signal processing circuit in the second FPGA 55 performs processing such as filtering, synchronization, demodulation, equalization, decoding and the like on the signals, and restores original signals. The input end and the output end of the transducer are respectively provided with a radio frequency switch, the radio frequency switches carry out transceiving multiplexing on the transducer, and a time division duplex mode is adopted, so that the transducer can be alternately used by a transmitting circuit and a receiving circuit, and the function of bidirectional communication of the wireless communication device is realized. Compared with a scheme of realizing frequency division duplex by using a duplexer, the time division duplex scheme adopted by using the RF switch has the advantages of strong adaptability, low device cost and the like. The FPGA comprises a transmitting signal processing circuit and a receiving signal processing circuit, and the scheme of signal processing in the FPGA can be selected as a single carrier scheme or an orthogonal frequency division multiplexing scheme according to the actually required data transmission rate, so that the first FPGA 42 in the transmitting end signal processing circuit can be simultaneously used as the second FPGA 55 in the receiving end signal processing circuit on the same side. When the wireless communication device performs bidirectional transmission, the first FPGA 42 includes a transmitting and receiving signal processing circuit, and needs to control the operation of the first RF switch 8 according to a synchronization flag carried in a signal.

Example two

Referring to fig. 3, the first signal processing circuit includes a transmitting end signal processing circuit, and the second signal processing circuit includes a receiving end signal processing circuit.

Each ultrasonic channel comprises a first analog-to-digital converter 41, a first field programmable gate array 42, a first digital-to-analog converter 43, a power amplifier 44, a first impedance matching circuit 6 and a first transducer 2 which are arranged on one side of the metal barrier and electrically connected in sequence, a second transducer 3, a second impedance matching circuit 7, an attenuator 52, a low noise amplifier 53, a second analog-to-digital converter 54, a second field programmable gate array 55 and a second digital-to-analog converter 56 which are arranged on the other side of the metal barrier and electrically connected in sequence, after a signal source is input into the first ADC 41 or the first FPGA 42, the first FPGA 41 carries out coding, modulation, filtering and other processing, outputs a signal to the first DAC43 to be converted into an analog signal, generates maximum power output through the PA 44, drives the first transducer 2 after passing through the first impedance matching circuit 6, the first transducer 2 excites ultrasonic waves in the metal barrier under the excitation of a driving signal, the ultrasonic waves penetrate through the metal barrier, then the ultrasonic waves are captured and converted into electric signals by the second transducer 3, the electric signals are output to the attenuator 52 through the second impedance matching circuit 7, the amplitude of the electric signals is adjusted to be proper through the attenuator 52 and the LNA 53, the electric signals are converted into digital signals through the second ADC 54 and then are sent to the second FPGA 55, the signals are filtered, synchronized, demodulated, equalized, decoded and the like through a signal processing circuit in the second FPGA 55, original signals are restored and output in the form of the digital signals, or the original signals pass through a receiving end, and the one-way communication of the communication device is realized. When the communication device carries out unidirectional communication, only one-direction signal is input, so that the arrangement of a radio frequency switch in a circuit can be omitted.

The wireless communication device is used for occasions needing to penetrate through the container wall of a sealed metal cabin body to transmit data, such as a hyperbaric oxygen chamber, a spacecraft, a submersible vehicle and the like, can eliminate the need of drilling for wired data communication, and does not need to be in contact with the surface of a metal wall. The wireless communication device utilizes ultrasonic waves as carriers of information and energy, and can penetrate through the sealed metal shell to transmit the information and the electric energy in a wireless mode, so that the reliability of the metal shell is improved, and the maintenance cost is reduced.

It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided would be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of the subject matter that is disclosed herein is not intended to forego such subject matter, nor should the applicants be construed as having contemplated such subject matter as being part of the disclosed subject matter.

Claims

1. A wireless communication device, comprising at least one ultrasonic channel, each of said ultrasonic channels comprising a first transducer disposed on one side of a metallic barrier and a first signal processing circuit electrically connected to said first transducer, a second transducer disposed on the other side of the metallic barrier and a second signal processing circuit electrically connected to said second transducer.

2. The wireless communication device of claim 1, wherein the first transducer is in direct contact with or has an air gap disposed therebetween, and wherein the second transducer is in direct contact with or has an air gap disposed therebetween.

3. The wireless communication device of claim 1, wherein a first impedance matching circuit is disposed between the first signal processing circuit and the first transducer, and wherein a second impedance matching circuit is disposed between the second signal processing circuit and the second transducer.

4. The wireless communication device according to claim 1, wherein the first signal processing circuit comprises a transmitting-side signal processing circuit and at most one receiving-side signal processing circuit, and a first rf switch electrically connecting the transmitting-side signal processing circuit and at most one receiving-side signal processing circuit at one end and the first transducer at the other end; the second signal processing circuit comprises a receiving end signal processing circuit and at most one transmitting end signal processing circuit, and a second radio frequency switch, one end of the second radio frequency switch is electrically connected with the receiving end signal processing circuit and at most one transmitting end signal processing circuit, and the other end of the second radio frequency switch is electrically connected with the second energy converter.

5. The wireless communication device according to claim 4, wherein the transmitting end signal processing circuit comprises a first field programmable gate array, a first digital-to-analog converter and a power amplifier, and the first field programmable gate array, the first digital-to-analog converter, the power amplifier and the first radio frequency switch or the second radio frequency switch are electrically connected in sequence.

6. The wireless communication device of claim 5, wherein the transmit-side signal processing circuit further comprises a first analog-to-digital converter electrically connected to the first field programmable gate array.

7. The wireless communication apparatus according to claim 4, wherein the receiving-end signal processing circuit comprises an attenuator, a low noise amplifier, a second analog/digital converter and a second field programmable gate array, and the first radio frequency switch or the second radio frequency switch, the attenuator, the low noise amplifier, the second analog/digital converter and the second field programmable gate array are electrically connected in sequence.

8. The wireless communication device of claim 7, wherein the receiving-end signal processing circuit further comprises a second digital-to-analog converter electrically connected to the second field programmable gate array.

9. The wireless communication device of claim 1, wherein the first transducer and the second transducer each use electromagnetic acoustic transducers.

10. The wireless communication device of claim 9, wherein the electromagnetic acoustic transducer comprises a magnet and a coil, the static magnetic field of the magnet is perpendicular to the surface of the metal barrier, and the coil is a flat coil.

11. The wireless communication device of claim 9, wherein the electromagnetic transducer comprises a magnet and a coil, and wherein the coil has an active area that is perpendicular to the magnetic field and parallel to the surface of the metallic barrier.