CN103560837B - Real-time medical communication system based on current coupling type human body communications and communication method thereof - Google Patents
Real-time medical communication system based on current coupling type human body communications and communication method thereof Download PDFInfo
- Publication number
- CN103560837B CN103560837B CN201310586022.6A CN201310586022A CN103560837B CN 103560837 B CN103560837 B CN 103560837B CN 201310586022 A CN201310586022 A CN 201310586022A CN 103560837 B CN103560837 B CN 103560837B
- Authority
- CN
- China
- Prior art keywords
- signal
- human body
- patch electrode
- module
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The invention discloses a real-time medical communication system based on current coupling type human body communications and a communication method of the real-time medical communication system, and belongs to the field of human body communications, wherein the problem that an existing whole system of capacity coupling type human body communications is poor in adaptation and stability is mainly solved. The real-time medical communication system comprises a power module, a transmitter and a receiver, wherein the transmitter and the receiver are respectively connected with the power module and installed on a human body. The communication method of the real-time medical communication system comprises the steps that a medical signal of the human body is converted into a differential current signal suitable for transmission of human tissues through the transmitter, the differential current signal is transmitted to a patch electrode through a guide line and is injected into the human tissues through the patch electrode, a voltage signal in the human tissues is collected and transmitted to the receiver, and the receiver detects voltage of two different positions on the human body so as to obtain the medical signal. Information is transmitted by safely and stably using the human body as a medium without affecting the normal physiological status of a person, and the real-time medical communication system based on the current coupling type human body communications and the communication method of the real-time medical communication system are suitable for being popularized and used on a large scale.
Description
Technical field
The present invention relates to a kind of medical communication system and communication means, be specifically related to a kind of real time medical communication system based on current coupling type human body communication and communication means thereof, belong to human body communication field.
Background technology
Human body communication (Intra-body Communication, IBC) be a kind of emerging short distance " wireless " communication mode, its maximum feature is the transmission ature of coal utilizing human body as ultra-weak electronic signal, with realize human body surface, inside, surrounding etc. all can and the electronic installation of human contact between transfer of data and share, compare and common are line and wireless connect technology, IBC not only eliminates miscellaneous line, has the features such as power consumption is little, radiation is faint, with low cost, fail safe is good concurrently simultaneously.The human body communication technology of present stage can realize body surface, signal between a series of Wearable/implantable medical transducer/instruments such as body is interior is mutual and shared, thus builds physiology signal acquisition, basic platform-the body area network of analysis and treament, to reducing equipment cost, improve care quality while the step that simplifies the operation, this novel health supervision pattern, for user, is not only conducive to Collaborative Control and the Parameter fusion of each transducer, is convenient to user and makes tentatively to self health status, objective, comprehensive evaluation, more by physiological parameter that human body base station/server will detect, evaluation result is by public network (GSM, 3G) be sent to the service platform of community or hospital, make last diagnostic for health care professional, be particularly useful for needs real-time, continuously, the medical monitoring occasion of the various human body physiological characteristics parameter of long-time detection, such as chronic disease, geriatric disease patient, the monitoring of disabled person and sportsman, the status monitoring of spacefarer.
Present stage, human body communication technology can be divided into capacitively coupled and current coupling two class, the whole system of capacitively coupled is made up of transmitting terminal, human body, receiving terminal three part, transmitting terminal and receiving terminal have signal patch electrode and coupled patch electrode over the ground respectively, signal patch electrode is used for sending and detection signal, this patch electrode can with human contact, also can near the skin of human body; Over the ground coupled patch electrode be mainly used for produce signal to earth-return.These all can only concentrate on human body surface and carry out, communication is also only limitted to the communication on surface to surface, organization internal cannot be goed deep into, this is due in the transmitting procedure of signal, transmitting terminal and receiving terminal must be formed earth-return, therefore this mode is not suitable for implanted human body communication, and due to the uncertainty in loop in human body transmission's process, make transceiver design difficulty larger, in this external communication process, the similar outside radiation dispersion field of the working method of coupled patch electrode over the ground, uncertain factor is too large, very easily be subject to outside electromagnetic interference, thus cause the adaptability of system and stability to reduce.The patch electrode that current coupling sexual type human body communication and capacitively coupled human body communication difference are dispensing device and receiving system directly and human contact, and do not need to occur to be coupled over the ground with ground, for the placement of equipment relaxes condition, and power consumption very low (only needing 8uW), therefore it is applicable to the communication technology of implanted equipment.
Summary of the invention
The object of the present invention is to provide a kind of real time medical communication system based on current coupling type human body communication and communication means thereof, mainly solve the problem that existing capacitively coupled human body communication causes the adaptability of whole system because of the dependence to earth-return, stability declines.
To achieve these goals, the technical solution used in the present invention is as follows:
A kind of real time medical communication system based on current coupling type human body communication, comprise power module, be connected with power module respectively, be installed on the transmitter and receiver on human body simultaneously, for connecting the first patch electrode of human body and transmitter, second patch electrode, connect the 3rd patch electrode of human body and receiver, 4th patch electrode, described transmitter comprises the modulation module based on FPGA, the DDS module be connected with the modulation module based on FPGA, to be connected with DDS module and single ended voltage for being connected the first patch electrode and the second patch electrode changes difference current module, described receiver comprises the signal receiving module be connected with tissue with the 4th patch electrode by the 3rd patch electrode, the analog multiplier connected in turn, phase shifter, phase-locked loop, based on the demodulation module of FPGA, analog multiplier is connected with signal receiving module.
Particularly, the described modulation module based on FPGA comprises the frequency divider for being connected with external clock signal, the selector be connected with frequency divider, the differential phase coding device be connected with selector respectively and internal clock signal generation module, the driver be connected with differential phase coding device respectively and the serial/parallel converter for connecting medical-therapeutic treatment of human body signal, driver and DDS model calling.The described demodulation module based on FPGA comprises the serial/parallel converter connected in turn, sample decision device, parallel/serial converter, and serial/parallel converter is connected with phase-locked loop, and parallel/serial converter is connected with external screen.
Further, described single ended voltage conversion difference current module comprise connect in turn for the voltage regulator circuit to input voltage regulation, for single-ended voltage signal being converted to the single ended voltage slip voltage division circuit of differential voltage signal, being used for differential voltage signal to convert to the Voltage-current conversion circuit of differential current signal, voltage regulator circuit is connected with DDS module, and Voltage-current conversion circuit is connected with the first patch electrode, the second patch electrode.
Described signal receiving module comprise connect in turn for measure the voltage difference on human body between two diverse locations instrument amplifier circuit, for suppressing the band pass filter circuit of interference signal, for providing the voltage regulator circuit of enough voltage for rear class signal transacting, described instrument amplifier circuit is connected with the 3rd patch electrode, the 4th patch electrode, and voltage regulator circuit is connected with analog multiplier with the demodulation module based on FPGA respectively.
Again further, the described driver DDS module that to be AD9834, DDS module be based on AD9834, analog multiplier is MC1496, and phase shifter is 74LS123, and phase-locked loop is CD4046.
Based on a communication means for the real time medical communication system of current coupling type human body communication, comprise the following steps:
(1) the medical-therapeutic treatment of human body signal collected is converted to the differential current signal of applicable tissue transmission by transmitter, send patch electrode to by wire;
(2) differential current signal that transmitter is sent by the patch electrode connecting transmitter injects tissue, and the voltage signal that the patch electrode connecting receiver gathers in tissue sends receiver to;
(3) receiver obtains medical signal by the voltage between two diverse locations in patch electrode human body, and is presented on screen.
Particularly, specifically comprise the following steps in described step (1):
(1a) the medical-therapeutic treatment of human body signal collected converts the medical-therapeutic treatment of human body signal of serial input to parallel data by serial/parallel converter, then sends into differential phase coding device;
(1b) external clock signal enters selector by frequency divider, internal clock signal generation module produces internal clock signal and enters selector simultaneously, then by differential phase coding device, the signal of input difference phase encoder is converted to the logical signal represented by the relation between last code element two orthogonal signalling and current symbol two orthogonal signalling;
(1c) logical signal after differential phase coding is by producing the signal of needs after AD9834 driver, the control then by accepting FPGA based on the DDS module of AD9834 produces qpsk modulation signal;
(1d) finally by single ended voltage conversion difference current module, qpsk modulation signal is converted to the differential current signal of the 1mA transmitted in applicable tissue, inject tissue by the first patch electrode and the second patch electrode.
Further, specifically comprise the following steps in described step (3):
(2a) medical signal obtained by voltage on the 3rd patch electrode and the 4th patch electrode human body between two diverse locations is obtained by signal receiving module, MC1496 analog multiplier, 74LS123 phase shifter, CD4046 phase-locked loop the demodulation module that carrier signal sends into based on FPGA successively and carries out demodulation;
(2b) demodulation module that the modulated digital signal sent by signal receiving module is sent into based on FPGA simultaneously carries out demodulation.
Again further, based in the demodulation module of FPGA, comprise the following steps:
(1i) by serial/parallel converter, the carrier signal sent into and modulated digital signal are generated code element, then through oversampling decision device, after input sync signal, obtain the logical signal of transmission simultaneously;
(2i) again by the logical signal that determines by parallel/serial converter, be converted to data simultaneously after input sync signal and output in screen and show.
Compared with prior art, the present invention has following beneficial effect:
(1) the present invention can under the normal physiological condition not affecting people, safety, and the stable human body that utilizes realizes information transmission as medium, has easy to connect, low-power consumption, is not subject to outside noise interference, to plurality of advantages such as external radiation are less;
(2) patch electrode of dispensing device of the present invention and receiving system directly and human contact, do not need to occur to be coupled over the ground with ground, for the placement of equipment relaxes condition, and power consumption very low (only needing 8uW), due to transmitting terminal and receiving terminal directly and contact tissue, do not need to be coupled over the ground with ground, be therefore applicable to the communication technology of implanted equipment;
(3) the present invention utilizes human body as communication conductor, it can avoid complicated connecting line, along with the development of microelectric technique, implantable medical device will be more and more small, the space shared by implanted equipment needed for human body communication also just becomes more and more less, the wound brought to human body also becomes more and more less, therefore has very large science and market prospects;
(4) electric current that transmitting terminal patch electrode of the present invention sends flows through human body, directly be coupled with receiving terminal patch electrode, so current coupling anti-electromagnetic interference capability is very strong, ratio capacitance coupling is more stable, thus be conducive to realizing high-speed communication, because its wanted carrier frequency is low, voltage and current is all very little, communication security, is applicable to large-scale promotion and uses very much.
Accompanying drawing explanation
Fig. 1 is system block diagram of the present invention.
Fig. 2 is human body upper arm patch electrode details drawing of the present invention.
Fig. 3 is the present invention-embodiment single ended voltage conversion difference current modular circuit schematic diagram.
Fig. 4 is the present invention-embodiment signal receiving module circuit theory diagrams.
Fig. 5 is the simulation result figure of the present invention-embodiment.
Fig. 6 is the actual test result figure of the present invention-embodiment.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described, and embodiments of the present invention include but not limited to the following example.
Embodiment
As shown in Fig. 1-Fig. 4, a kind of real time medical communication system based on current coupling type human body communication, it is characterized in that, comprise power module, be connected with power module respectively, be installed on the transmitter and receiver on human body simultaneously, for connecting the first patch electrode of human body and transmitter, second patch electrode, connect the 3rd patch electrode of human body and receiver, 4th patch electrode, described transmitter comprises the modulation module based on FPGA, the DDS module be connected with the modulation module based on FPGA, to be connected with DDS module and single ended voltage for being connected the first patch electrode and the second patch electrode changes difference current module, described receiver comprises the signal receiving module be connected with tissue with the 4th patch electrode by the 3rd patch electrode, the analog multiplier connected in turn, phase shifter, phase-locked loop, based on the demodulation module of FPGA, analog multiplier is connected with signal receiving module.
The described modulation module based on FPGA comprises the frequency divider for being connected with external clock signal, the selector be connected with frequency divider, the differential phase coding device be connected with selector respectively and internal clock signal generation module, the driver be connected with differential phase coding device respectively and the serial/parallel converter for connecting medical-therapeutic treatment of human body signal, driver and DDS model calling.The described demodulation module based on FPGA comprises the serial/parallel converter connected in turn, sample decision device, parallel/serial converter, and serial/parallel converter is connected with phase-locked loop, and parallel/serial converter is connected with external screen.
Described single ended voltage conversion difference current module comprise connect in turn for the voltage regulator circuit to input voltage regulation, for single-ended voltage signal being converted to the single ended voltage slip voltage division circuit of differential voltage signal, being used for differential voltage signal to convert to the Voltage-current conversion circuit of differential current signal, voltage regulator circuit is connected with DDS module, and Voltage-current conversion circuit is connected with the first patch electrode, the second patch electrode.Described voltage regulator circuit comprises the resistance R1 with DDS model calling, the swept resistance R2 be connected with resistance R1, the sliding end ground connection of swept resistance R2, be connected to the operational amplifier U1 between resistance R1 and swept resistance R2, described single ended voltage slip voltage division circuit comprises the resistance R3 be connected with operational amplifier U1 output, the operational amplifier U2 that inverting input is connected with resistance R3, be connected to the resistance R4 between operational amplifier U2 inverting input and output, the resistance R5 be connected with operational amplifier U2 in-phase input end, the other end ground connection of resistance R5, the resistance R6 in parallel with resistance R3 and resistance R7 after series connection, the other end ground connection of resistance R7, be connected to the operational amplifier U3 between resistance R6 and resistance R7.
Described Voltage-current conversion circuit comprises the operational amplifier U4 that in-phase input end is connected with operational amplifier U2, the operational amplifier U8 that in-phase input end is connected with operational amplifier U4 output, the electric capacity C21 be connected with operational amplifier U8 common port, the other end of electric capacity C21 is connected with the first outside patch electrode, the swept resistance R11 be simultaneously connected with operational amplifier U4 inverting input and operational amplifier U8 inverting input, the operational amplifier U9 that output is connected with swept resistance R11 sliding end, be connected to the electric capacity C3 between operational amplifier U9 inverting input and output, the resistance R12 be connected with operational amplifier U9 inverting input, the other end ground connection of resistance R12, be connected to the resistance R13 between operational amplifier U8 output and operational amplifier U9 in-phase input end, the electric capacity C4 be connected with operational amplifier U9 in-phase input end, the other end ground connection of electric capacity C4, the operational amplifier U5 that in-phase input end is connected with operational amplifier U3 output, the operational amplifier U6 be connected with operational amplifier U5 output, the electric capacity C31 be connected with operational amplifier U6 common port, the other end of electric capacity C31 is connected with the second outside patch electrode, the swept resistance R8 be simultaneously connected with operational amplifier U5 inverting input and operational amplifier U6 inverting input, the operational amplifier U7 that output is connected with the sliding end of swept resistance R8, be connected to the electric capacity C1 between operational amplifier U7 inverting input and output, the resistance R9 be connected with operational amplifier U7 inverting input, be connected to the resistance R10 between operational amplifier U6 output and operational amplifier U7 in-phase input end, the electric capacity C2 be connected with operational amplifier U7 in-phase input end, the other end ground connection of electric capacity C2.
Described signal receiving module comprise connect in turn for measure the voltage difference on human body between two diverse locations instrument amplifier circuit, for suppressing the band pass filter circuit of interference signal, for providing the voltage regulator circuit of enough voltage for rear class signal transacting, described instrument amplifier circuit is connected with the 3rd patch electrode, the 4th patch electrode, and voltage regulator circuit is connected with analog multiplier with the demodulation module based on FPGA respectively.Described instrument amplifier circuit comprises the electric capacity C5 be connected with the 3rd patch electrode, the operational amplifier U10 that in-phase input end is connected with electric capacity C5, the electric capacity C7 between operational amplifier U10 inverting input and output and resistance R15 is connected to after parallel connection, the resistance R14 be connected with operational amplifier U10 inverting input, the electric capacity C9 connected in turn, resistance R17 and electric capacity C11, electric capacity C9 is connected with operational amplifier U10 output, the resistance R20 in parallel with electric capacity C11 and operational amplifier U12 after in parallel, the operational amplifier U11 that inverting input is connected with resistance R14, the in-phase input end of operational amplifier U11 is connected with the 4th patch electrode by electric capacity C6, the electric capacity C8 between operational amplifier U11 inverting input and output and resistance R16 is connected to after parallel connection, be connected to the electric capacity C10 between operational amplifier U11 output and operational amplifier U12 and resistance R18 in turn, the electric capacity C12 be connected with operational amplifier U12 in-phase input end after in parallel and resistance R19, the other end ground connection of electric capacity C12 and resistance R19.
Described band pass filter circuit comprises the electric capacity C13 connected in turn, electric capacity C14, operational amplifier U13, resistance R23, resistance R24, operational amplifier U14, electric capacity C13 is connected with operational amplifier U12 output, one end is connected between electric capacity C13 and electric capacity C14, the resistance R21 that the other end is connected with operational amplifier U13 inverting input, the resistance R22 be connected with operational amplifier U13 in-phase input end, the other end ground connection of resistance R22, one end is connected between resistance R23 and resistance R24, the electric capacity C15 that the other end is connected with operational amplifier U14 inverting input, the electric capacity C16 be connected with operational amplifier U14 in-phase input end, the other end ground connection of electric capacity C16, described voltage regulator circuit comprises the operational amplifier U15 be connected with operational amplifier U14 output, be connected to the swept resistance R26 between operational amplifier U15 inverting input and output, the sliding end of swept resistance R26 is connected with operational amplifier U15 output, the resistance R25 be connected with operational amplifier U15 inverting input, the other end ground connection of resistance R25, the output of operational amplifier U15 is connected with analog multiplier with demodulation module respectively.
The described driver DDS module that to be AD9834, DDS module be based on AD9834, analog multiplier is MC1496, and phase shifter is 74LS123, and phase-locked loop is CD4046.
Based on a communication means for the real time medical communication system of current coupling type human body communication, comprise the following steps:
(1) the medical-therapeutic treatment of human body signal collected is converted to the differential current signal of applicable tissue transmission by transmitter, send patch electrode to by wire;
(2) differential current signal that transmitter is sent by the patch electrode connecting transmitter injects tissue, and the voltage signal that the patch electrode connecting receiver gathers in tissue sends receiver to;
(3) receiver obtains medical signal by the voltage between two diverse locations in patch electrode human body, and is presented on screen.
Described step specifically comprises the following steps in (1):
(1a) the medical-therapeutic treatment of human body signal collected converts the medical-therapeutic treatment of human body signal of serial input to parallel data by serial/parallel converter, then sends into differential phase coding device;
(1b) external clock signal enters selector by frequency divider, internal clock signal generation module produces internal clock signal and enters selector simultaneously, then by differential phase coding device, the signal of input difference phase encoder is converted to the logical signal represented by the relation between last code element two orthogonal signalling and current symbol two orthogonal signalling;
(1c) logical signal after differential phase coding is by producing the signal of needs after AD9834 driver, the control then by accepting FPGA based on the DDS module of AD9834 produces qpsk modulation signal;
(1d) finally by single ended voltage conversion difference current module, qpsk modulation signal is converted to the differential current signal of the 1mA transmitted in applicable tissue, inject tissue by the first patch electrode and the second patch electrode.
Single ended voltage conversion difference current module, it realizes mainly containing three part compositions: voltage regulator circuit, by regulating the adjustment of R2 realization to input voltage, then forming follower by operational amplifier U1 and exporting; Single ended voltage slip voltage division circuit, single-ended voltage signal divides two-way after sending into, the positive input of one route operational amplifier U3, the anti-phase input of a route operational amplifier U2, finally obtains differential voltage signal at the output of operational amplifier U2 and operational amplifier U3; Voltage-current conversion circuit, this circuit selects current feedback operational amplifier U6 and operational amplifier U8, as main element.
Described step specifically comprises the following steps in (3):
(2a) medical signal obtained by voltage on the 3rd patch electrode and the 4th patch electrode human body between two diverse locations is obtained by signal receiving module, MC1496 analog multiplier, 74LS123 phase shifter, CD4046 phase-locked loop the demodulation module that carrier signal sends into based on FPGA successively and carries out demodulation;
(2b) demodulation module that the modulated digital signal sent by signal receiving module is sent into based on FPGA simultaneously carries out demodulation.
Signal receiving module, the effect of this module is the signal that process patch electrode detects, this signal can demodulated module well be identified, it realizes mainly containing three part compositions: instrument amplifier circuit, do difference to the voltage between two electrodes this signal to be amplified, for rear class process provides gain simultaneously; Band pass filter circuit, selects the signal in 1kHz-1MHz frequency band as the signal of next stage process; Voltage regulator circuit, because signal is by having decay after filter, by this module by the voltage of the Signal Regulation after filtered device decay to applicable rear class process.
Based in the demodulation module of FPGA, comprise the following steps:
(1i) by serial/parallel converter, the carrier signal sent into and modulated digital signal are generated code element, then through oversampling decision device, after input sync signal, obtain the logical signal of transmission simultaneously;
(2i) again by the logical signal that determines by parallel/serial converter, be converted to data simultaneously after input sync signal and output in screen and show.
Connect by using Quartus ii9.0 and Modelsim6.4a and adjust, and Multisim11.0 emulation, obtain result as figure 5 illustrates, waveform 1, waveform 2 is transmitter patch electrode detection waveform respectively, waveform 3 is the waveform obtained after realizing waveform 1-waveform 2 by oscilloscope internal algorithm, and waveform 4 is the waveforms exported by receiver.
By actual fabrication circuit board, and the result result as shown in Figure 6 of actual testing human communication, waveform 2 is waveforms when dividing current module from the slip of QPSK modulation module input single ended voltage in transmitter, and waveform 1 is the waveform exported by receiver.
According to above-described embodiment, just the present invention can be realized well.
Claims (8)
1. the real time medical communication system based on current coupling type human body communication, it is characterized in that, comprise power module, be connected with power module respectively, be installed on the transmitter and receiver on human body simultaneously, for connecting the first patch electrode of human body and transmitter, second patch electrode, connect the 3rd patch electrode of human body and receiver, 4th patch electrode, described transmitter comprises the modulation module based on FPGA, the DDS module be connected with the modulation module based on FPGA, to be connected with DDS module and single ended voltage for being connected the first patch electrode and the second patch electrode changes difference current module, described receiver comprises the signal receiving module be connected with tissue with the 4th patch electrode by the 3rd patch electrode, the analog multiplier connected in turn, phase shifter, phase-locked loop, based on the demodulation module of FPGA, analog multiplier is connected with signal receiving module, the described modulation module based on FPGA comprises the frequency divider for being connected with external clock signal, the selector be connected with frequency divider, the differential phase coding device be connected with selector respectively and internal clock signal generation module, the driver be connected with differential phase coding device respectively and the serial/parallel converter for connecting medical-therapeutic treatment of human body signal, driver and DDS model calling, the described demodulation module based on FPGA comprises the serial/parallel converter connected in turn, sample decision device, parallel/serial converter, and serial/parallel converter is connected with phase-locked loop, and parallel/serial converter is connected with external screen.
2. a kind of real time medical communication system based on current coupling type human body communication according to claim 1, it is characterized in that, described single ended voltage conversion difference current module comprise connect in turn for the voltage regulator circuit to input voltage regulation, for single-ended voltage signal being converted to the single ended voltage slip voltage division circuit of differential voltage signal, being used for differential voltage signal to convert to the Voltage-current conversion circuit of differential current signal, voltage regulator circuit is connected with DDS module, and Voltage-current conversion circuit is connected with the first patch electrode, the second patch electrode.
3. a kind of real time medical communication system based on current coupling type human body communication according to claim 2, it is characterized in that, described signal receiving module comprises the instrument amplifier circuit for measuring the voltage difference on human body between two diverse locations connected in turn, for suppressing the band pass filter circuit of interference signal, for providing the voltage regulator circuit of enough voltage for rear class signal transacting, described instrument amplifier circuit and the 3rd patch electrode, 4th patch electrode is connected, voltage regulator circuit is connected with analog multiplier with the demodulation module based on FPGA respectively.
4. a kind of real time medical communication system based on current coupling type human body communication according to claim 3, it is characterized in that, described driver is AD9834, DDS module is the DDS module based on AD9834, analog multiplier is MC1496, and phase shifter is 74LS123, and phase-locked loop is CD4046.
5. the communication means of a kind of real time medical communication system based on current coupling type human body communication according to claim 1 ~ 4 any one, is characterized in that, comprise the following steps:
(1) the medical-therapeutic treatment of human body signal collected is converted to the differential current signal of applicable tissue transmission by transmitter, send patch electrode to by wire;
(2) differential current signal that transmitter is sent by the patch electrode connecting transmitter injects tissue, and the voltage signal that the patch electrode connecting receiver gathers in tissue sends receiver to;
(3) receiver obtains medical signal by the voltage between two diverse locations in patch electrode human body, and is presented on screen.
6. the communication means of a kind of real time medical communication system based on current coupling type human body communication according to claim 5, it is characterized in that, described step specifically comprises the following steps in (1):
(1a) the medical-therapeutic treatment of human body signal collected converts the medical-therapeutic treatment of human body signal of serial input to parallel data by serial/parallel converter, then sends into differential phase coding device;
(1b) external clock signal enters selector by frequency divider, internal clock signal generation module produces internal clock signal and enters selector simultaneously, then by differential phase coding device, the signal of input difference phase encoder is converted to the logical signal represented by the relation between last code element two orthogonal signalling and current symbol two orthogonal signalling;
(1c) logical signal after differential phase coding is by producing the signal of needs after AD9834 driver, the control then by accepting FPGA based on the DDS module of AD9834 produces qpsk modulation signal;
(1d) finally by single ended voltage conversion difference current module, qpsk modulation signal is converted to the differential current signal of the 1mA transmitted in applicable tissue, inject tissue by the first patch electrode and the second patch electrode.
7. the communication means of a kind of real time medical communication system based on current coupling type human body communication according to claim 6, it is characterized in that, described step specifically comprises the following steps in (3):
(2a) medical signal obtained by voltage on the 3rd patch electrode and the 4th patch electrode human body between two diverse locations is obtained by signal receiving module, MC1496 analog multiplier, 74LS123 phase shifter, CD4046 phase-locked loop the demodulation module that carrier signal sends into based on FPGA successively and carries out demodulation;
(2b) demodulation module that the modulated digital signal sent by signal receiving module is sent into based on FPGA simultaneously carries out demodulation.
8. the communication means of a kind of real time medical communication system based on current coupling type human body communication according to claim 7, is characterized in that, based in the demodulation module of FPGA, comprises the following steps:
(1i) by serial/parallel converter, the carrier signal sent into and modulated digital signal are generated code element, then through oversampling decision device, after input sync signal, obtain the logical signal of transmission simultaneously;
(2i) again by the logical signal that determines by parallel/serial converter, be converted to data simultaneously after input sync signal and output in screen and show.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310586022.6A CN103560837B (en) | 2013-11-20 | 2013-11-20 | Real-time medical communication system based on current coupling type human body communications and communication method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310586022.6A CN103560837B (en) | 2013-11-20 | 2013-11-20 | Real-time medical communication system based on current coupling type human body communications and communication method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103560837A CN103560837A (en) | 2014-02-05 |
| CN103560837B true CN103560837B (en) | 2015-07-15 |
Family
ID=50015007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310586022.6A Expired - Fee Related CN103560837B (en) | 2013-11-20 | 2013-11-20 | Real-time medical communication system based on current coupling type human body communications and communication method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103560837B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103871137B (en) * | 2014-03-11 | 2017-02-08 | 中国科学院深圳先进技术研究院 | Access control system and method |
| CN104702792A (en) * | 2015-03-20 | 2015-06-10 | 小米科技有限责任公司 | State control method and device, electronic device of terminal screen |
| CN105550503A (en) * | 2015-12-08 | 2016-05-04 | 刘益和 | Community medical system based on current coupled mode intra-body communication and realization method thereof |
| CN106250802B (en) * | 2015-12-28 | 2019-11-29 | 北京智谷睿拓技术服务有限公司 | The method and apparatus for identifying object |
| CN106618499B (en) * | 2016-12-14 | 2020-11-10 | 深圳先进技术研究院 | Fall detection device, fall detection method and device |
| CN108768467B (en) * | 2018-05-25 | 2021-06-29 | 恒玄科技(上海)股份有限公司 | Communication system and communication method for enhancing near field communication by using human body |
| CN112932476A (en) * | 2019-11-26 | 2021-06-11 | Oppo广东移动通信有限公司 | Information prompting method and related equipment |
| CN114665982A (en) * | 2022-02-28 | 2022-06-24 | 浙江大学 | Circuit and method based on human body channel communication |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203554458U (en) * | 2013-11-20 | 2014-04-16 | 张双 | Real-time medical communication system based on current coupling type human body communication |
-
2013
- 2013-11-20 CN CN201310586022.6A patent/CN103560837B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203554458U (en) * | 2013-11-20 | 2014-04-16 | 张双 | Real-time medical communication system based on current coupling type human body communication |
Non-Patent Citations (4)
| Title |
|---|
| Marc Simon Wegmueller et al.BPSK & * |
| QPSK Modulated Data Communication for Biomedical Monitoring Sensor Network.《Engineering in Medicine and Biology Society》.2006,第2071-2074页. * |
| 基于DDS技术的全数字QPSK调制器的设计;张楠等;《工矿自动化》;20090731(第7期);第105-107页 * |
| 电流耦合型人体通信准静态建模与收发器设计;高跃明等;《电子测量与仪器学报》;20120831;第26卷(第8期);第733-736页，图3-4 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103560837A (en) | 2014-02-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103560837B (en) | Real-time medical communication system based on current coupling type human body communications and communication method thereof | |
| Chen et al. | Design of galvanic coupling intra-body communication transceiver using direct sequence spread spectrum technology | |
| CN103479353B (en) | Wireless warning system and wireless warning method for bedridden incontinent patients | |
| CN101651369A (en) | Wireless energy supply and wireless acquisition system of nerve tract implanted electrode based on vlsivery large scale integrated circuit | |
| An et al. | A novel indoor healthcare with time hopping-based visible light communication | |
| CN203554458U (en) | Real-time medical communication system based on current coupling type human body communication | |
| Liao et al. | Path loss analysis and transceiver development for human body communication-based signal transmission for wearable robot control | |
| Rapin et al. | Two-wire bus combining full duplex body-sensor network and multilead biopotential measurements | |
| Wei et al. | Design and implementation of galvanic coupling intra-body communication transceivers using differential phase shift keying | |
| CN111419182A (en) | Nonlinear health analysis system | |
| CN201878140U (en) | Low-voltage power line carrier communication module | |
| CN110279410A (en) | Portable minisize is wireless stomach electricity collector | |
| CN204500736U (en) | A kind of fatigue driving brain electricity supervising device | |
| Seyedi et al. | An energy-efficient pulse position modulation transmitter for galvanic intrabody communications | |
| CN201117104Y (en) | Infrared data interface used for measuring high-voltage current | |
| CN112003653B (en) | Method and device for testing frequency hopping frequency in built-in test of frequency hopping communication equipment | |
| Bregar et al. | Multi-functional wireless body sensor-Analysis of autonomy | |
| CN201750893U (en) | Family remote electrocardiogram monitoring system based on ZigBee technology | |
| CN102006131B (en) | Environmental simulator device based on cognitive radio | |
| CN205667544U (en) | Based on AVR and the pulse monitoring device being wirelessly transferred | |
| CN101766485B (en) | Wireless mobile real-time acquisition device for electroencephalograph of small animals | |
| Tang et al. | A 2Mbps Human Body Communication Transceiver Based on Body Antenna Effect | |
| CN201185922Y (en) | Electrocardiogram monitor system based on bluetooth communication | |
| CN210721825U (en) | Wireless data transmission signal conversion equipment based on LORA Internet of things | |
| CN218158181U (en) | Multifunctional electric power measurement and control terminal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: NEIJIANG NORMAL UNIVERSITY Free format text: FORMER OWNER: ZHANG SHUANG Effective date: 20141029 Owner name: THE ENGINEERING TECHNOLOGY COLLEGE OF CHENGDU UNIV Effective date: 20141029 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 637165 NANCHONG, SICHUAN PROVINCE TO: 641100 NEIJIANG, SICHUAN PROVINCE |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20141029 Address after: 641100, Dong Tong Road, Xilin street, Dongxing District, Sichuan, Neijiang, 705 Applicant after: Neijiang Normal University Applicant after: THE ENGINEERING & TECHNICAL COLLEGE OF CHENGDU UNIVERSITY OF TECHNOLOGY Address before: 637165 Nanchong City, Sichuan province Gaoping District longxing Township Changxin Street No. 86 of No. 59 Applicant before: Zhang Shuang |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150715 Termination date: 20191120 |