CN110365373A - Near field communication system based on magnetic field coding - Google Patents
Near field communication system based on magnetic field coding Download PDFInfo
- Publication number
- CN110365373A CN110365373A CN201910680842.9A CN201910680842A CN110365373A CN 110365373 A CN110365373 A CN 110365373A CN 201910680842 A CN201910680842 A CN 201910680842A CN 110365373 A CN110365373 A CN 110365373A
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- magnetic field
- main control
- terminal circuit
- control mcu
- circuit
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- 230000005291 magnetic effect Effects 0.000 title claims abstract description 75
- 238000004891 communication Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 claims description 5
- 238000005070 sampling Methods 0.000 claims description 4
- 230000005294 ferromagnetic effect Effects 0.000 claims description 3
- 230000002045 lasting effect Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 230000008859 change Effects 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/40—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by components specially adapted for near-field transmission
- H04B5/48—Transceivers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/60—Jamming involving special techniques
- H04K3/62—Jamming involving special techniques by exposing communication, processing or storing systems to electromagnetic wave radiation, e.g. causing disturbance, disruption or damage of electronic circuits, or causing external injection of faults in the information
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
-
- 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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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses the near field communication systems encoded based on magnetic field, including transmitting terminal circuit and receiving terminal circuit；The receiving terminal circuit is made of main control MCU and geomagnetic sensor circuit, and main control MCU controls the variation of geomagnetic sensor real time scan absolute force；The transmitting terminal circuit is made of main control MCU and coil circuit, and main control MCU control coil circuit issues the electromagnetic signal of specific coding；The transmitting terminal circuit generates magnetic field by MCU control coil and generates interference to the earth magnetic field of receiving end near circuitry, and receiving terminal circuit acquires absolute force by geomagnetic sensor and receives changes of magnetic field information to sense changes in magnetic fields, then is decoded processing.The present invention realizes contactless unidirectionally controlled and communication, at low cost, low in energy consumption, high reliablity, without private communication chip, it can be achieved that simple communication and control using change of magnetic field strength.
Description
Technical field
The present invention relates to internet of things field, more particularly to the near field communication system based on magnetic field coding.
Background technique
Major part internet of things product, which requires, at present does low power dissipation design, reduces battery power supply pressure and improves cruising ability,
It so needs to achieve the purpose that in the product free time by circuit suspend mode to reduce power consumption.And portioned product has high-grade waterproof
It is required that this just needs to consider the disposable and tamper-proof of structure when product design.On the product of some no button designs, how
Carrying out simple control operation to product becomes after a difficult point, especially product enter autonomous dormant state, can not call out manually
It wakes up.
Summary of the invention
In view of the above-mentioned problems, being realized contactless unidirectional the invention proposes the near field communication system encoded based on magnetic field
Control and communication solve contactless communication and control problem of the internet of things product under high performance water proof requirement.
The present invention through the following technical solutions to achieve the above objectives:
Based on the near field communication system of magnetic field coding, including transmitting terminal circuit and receiving terminal circuit；
The receiving terminal circuit is made of main control MCU and geomagnetic sensor circuit, and it is real-time that main control MCU controls geomagnetic sensor
Scan absolute force variation；The transmitting terminal circuit is made of main control MCU and coil circuit, main control MCU control coil circuit hair
The electromagnetic signal of specific coding out；
The transmitting terminal circuit generates magnetic field by MCU control coil and does to the earth magnetic field generation of receiving end near circuitry
It disturbs, receiving terminal circuit acquires absolute force by geomagnetic sensor to sense changes in magnetic fields, receive changes of magnetic field information, then into
Row decoding process.
Further scheme is that the main control MCU of the transmitting terminal circuit carries out transmitting magnetic by built-in timer driving coil
Field signal operation, coil magnetic field duration are managed by main control MCU built-in timer.
Further scheme is that geomagnetic sensor background scanning is arranged in the main control MCU of the receiving terminal circuit, when earth magnetism senses
After device sense changes in magnetic fields, main control MCU opening timing device carries out magnetic field signal scanning and real-time decoding, executes letter after successfully decoded
Number corresponding instruction operation.
Further scheme is that the main control MCU of the transmitting terminal or receiving end can be single-chip microcontroller, is also possible to functional form
SOC, and support built-in timer module, it supports IO output switching signal, supports external chip driving.
Further scheme is that the transmitting terminal circuit needs receiving end need to be kept electric in communication close to receiving terminal circuit
Road is stationary, around interferes without ferromagnetic object, restarts transmitting terminal transmitting magnetic field signal, receiving end receives magnetic field signal simultaneously
It decodes, the corresponding control action of signal is executed after successfully decoded.
Further scheme is that the main control MCU of the receiving terminal circuit is set as geomagnetic sensor backstage in suspend mode and continues
Scanning feeds back to one interrupt signal of main control MCU, main control MCU opening timing device when perceiving changes of magnetic field to reduce power consumption
Field scan sampling is carried out, decoding operate is done according to coding rule in the magnetic field data stream of a fixed duration.
The beneficial effects of the present invention are:
The present invention realizes contactless unidirectionally controlled and communication using change of magnetic field strength, at low cost, low in energy consumption, reliably
Property it is high, without private communication chip, it can be achieved that simple communication and control.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
In required practical attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the one of the present embodiment
A little embodiments for those of ordinary skill in the art without creative efforts, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the systematic schematic diagram of the embodiment of the present invention.
Fig. 2 is the transmitting terminal flow chart of the embodiment of the present invention.
The receiving end flow chart of the position Fig. 3 the embodiment of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, technical solution of the present invention will be carried out below
Detailed description.Obviously, the described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art without making creative work it is obtained it is all its
Its embodiment belongs to the range that the present invention is protected.
In any embodiment, as shown in Figure 1-3, the application based on magnetic field coding near field communication system, including hair
Penetrate terminal circuit and receiving terminal circuit；
The receiving terminal circuit is made of main control MCU and geomagnetic sensor circuit, and it is real-time that main control MCU controls geomagnetic sensor
Scan absolute force variation；The transmitting terminal circuit is made of main control MCU and coil circuit, main control MCU control coil circuit hair
The electromagnetic signal of specific coding out；
The transmitting terminal circuit generates magnetic field by MCU control coil and does to the earth magnetic field generation of receiving end near circuitry
It disturbs, receiving terminal circuit acquires absolute force by geomagnetic sensor to sense changes in magnetic fields, receive changes of magnetic field information, then into
Row decoding process.
The main control MCU of the transmitting terminal circuit carries out transmitting magnetic field signal operation, line by built-in timer driving coil
Circle magnetic field duration is managed by main control MCU built-in timer.
Geomagnetic sensor background scanning is arranged in the main control MCU of the receiving terminal circuit, when geomagnetic sensor perception magnetic field becomes
After change, main control MCU opening timing device carries out magnetic field signal scanning and real-time decoding, and the corresponding instruction of signal is executed after successfully decoded
Operation.
The main control MCU of the transmitting terminal or receiving end can be single-chip microcontroller, be also possible to functional form SOC, and built in support
Timer module supports IO output switching signal, supports external chip driving.
The transmitting terminal circuit needs receiving terminal circuit need to be kept stationary in communication, week close to receiving terminal circuit
No ferromagnetic object interference is enclosed, transmitting terminal transmitting magnetic field signal is restarted, receiving end receives magnetic field signal and decodes, successfully decoded
The corresponding control action of signal is executed afterwards.
The main control MCU of the receiving terminal circuit is set as the lasting scanning in geomagnetic sensor backstage in suspend mode to reduce function
Consumption, one interrupt signal of main control MCU is fed back to when perceiving changes of magnetic field, and main control MCU opening timing device carries out field scan
Sampling, does decoding operate according to coding rule in the magnetic field data stream of a fixed duration.
In a specific embodiment, as shown in Figure 1, transmitting terminal circuit generates magnetic field to reception by MCU control coil
Earth magnetic field near terminal circuit generates interference, and receiving terminal circuit acquires absolute force by geomagnetic sensor to perceive magnetic field
Variation receives changes of magnetic field information, then is decoded processing.
It is operated as shown in Fig. 2, main control MCU carries out transmitting magnetic field signal by built-in timer driving coil, coil magnetic field
Duration is managed by main control MCU built-in timer.
As shown in figure 3, geomagnetic sensor background scanning is arranged in main control MCU, it is main after geomagnetic sensor sense changes in magnetic fields
It controls MCU opening timing device and carries out magnetic field signal scanning and real-time decoding, the corresponding instruction operation of signal is executed after successfully decoded.
In the present embodiment, transmitting terminal and receiving end main control MCU can be single-chip microcontroller, and it is (such as blue to be also possible to functional form SOC
Tooth SOC etc.), but must support built-in timer module, it supports IO output switching signal, supports external chip driving etc..
In the present embodiment, transmitting terminal circuit needs receiving terminal circuit need to be kept static in communication close to receiving terminal circuit
It is motionless.
In the present embodiment, receiving end main control MCU needs to be arranged the lasting scanning in geomagnetic sensor backstage in suspend mode to reduce
Power consumption, one interrupt signal of main control MCU is fed back to when perceiving changes of magnetic field, and main control MCU opening timing device carries out magnetic field and sweeps
Sampling is retouched, decoding operate is done according to coding rule in the magnetic field data stream of a fixed duration.
In the present embodiment, magnetic field coding method is not specifically limited, and can be made the appropriate adjustments as the case may be, if only needed
Two or three kind of control operation is done, then can be realized using the changes of magnetic field of fixed duration, for example fixed magnetic field variation in 2 seconds is
Shutdown, fixed magnetic field variation in 5 seconds is reset etc..It operates, is then needed using a byte if necessary to more complicated control
(Byte) information flow of 8 bits (bit) is realized, first defines the magnetic signature of bit value 0 and 1, further according to control byte value
To emit corresponding Magnetic Field stream.For example the magnetic field of 500 milligauss intensity of clock for 1 seconds is bit 0,0 Gauss of clock for 1 seconds is strong
The magnetic field of degree is bit 1, then the changes of magnetic field stream of a 8 seconds length can indicate the information of a byte.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Specific technical features described in the above specific embodiments, in not lance
In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.Various embodiments of the present invention can be combined randomly, only
Want it without prejudice to thought of the invention, it should also be regarded as the disclosure of the present invention.
Claims (6)
1. the near field communication system based on magnetic field coding, it is characterised in that: including transmitting terminal circuit and receiving terminal circuit；
The receiving terminal circuit is made of main control MCU and geomagnetic sensor circuit, and main control MCU controls geomagnetic sensor real time scan
Absolute force variation；The transmitting terminal circuit is made of main control MCU and coil circuit, and main control MCU control coil circuit issues special
It delimits the organizational structure the electromagnetic signal of code；
The transmitting terminal circuit generates magnetic field by MCU control coil and generates interference to the earth magnetic field of receiving end near circuitry,
Receiving terminal circuit acquires absolute force by geomagnetic sensor and receives changes of magnetic field information to sense changes in magnetic fields, then carries out
Decoding process.
2. the near field communication system according to claim 1 based on magnetic field coding, it is characterised in that: the transmitting terminal circuit
Main control MCU by built-in timer driving coil carry out transmitting magnetic field signal operation, coil magnetic field duration is by main control MCU
Built-in timer management.
3. the near field communication system according to claim 1 based on magnetic field coding, it is characterised in that: the receiving terminal circuit
Main control MCU be arranged geomagnetic sensor background scanning, after geomagnetic sensor sense changes in magnetic fields, main control MCU opening timing device
Magnetic field signal scanning and real-time decoding are carried out, the corresponding instruction operation of signal is executed after successfully decoded.
4. the near field communication system according to claim 2 or 3 based on magnetic field coding, it is characterised in that: the transmitting terminal
Or the main control MCU of receiving end can be single-chip microcontroller, be also possible to functional form SOC, and support built-in timer module, support IO defeated
Switching signal out supports external chip driving.
5. the near field communication system according to claim 1 based on magnetic field coding, it is characterised in that: the transmitting terminal circuit
It needs receiving terminal circuit need to be kept stationary in communication close to receiving terminal circuit, around interfered without ferromagnetic object, then open
Dynamic transmitting terminal emits magnetic field signal, and receiving end receives magnetic field signal and decodes, and it is dynamic that the corresponding control of signal is executed after successfully decoded
Make.
6. the near field communication system according to claim 1 based on magnetic field coding, it is characterised in that: the receiving terminal circuit
Main control MCU be set as the lasting scanning in geomagnetic sensor backstage in suspend mode to reduce power consumption, it is anti-when perceiving changes of magnetic field
One interrupt signal of main control MCU of feeding, main control MCU opening timing device carries out field scan sampling, in the magnetic of a fixed duration
Decoding operate is done according to coding rule in field data stream.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910680842.9A CN110365373A (en) | 2019-07-25 | 2019-07-25 | Near field communication system based on magnetic field coding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910680842.9A CN110365373A (en) | 2019-07-25 | 2019-07-25 | Near field communication system based on magnetic field coding |
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| Publication Number | Publication Date |
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| CN110365373A true CN110365373A (en) | 2019-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910680842.9A Pending CN110365373A (en) | 2019-07-25 | 2019-07-25 | Near field communication system based on magnetic field coding |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113518332A (en) * | 2021-04-19 | 2021-10-19 | Tcl通讯（宁波）有限公司 | Mobile terminal data processing method and device, terminal equipment and storage medium |
| CN114900207A (en) * | 2022-05-12 | 2022-08-12 | 烟台艾睿光电科技有限公司 | Non-contact communication method and scanning equipment capable of realizing non-contact communication |
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| US20140239945A1 (en) * | 2013-02-26 | 2014-08-28 | Diablo Controls, Inc. | Two-Wire Probe with Communication Capability |
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Application publication date: 20191022 |