CN102045091A - Short range data transmission device and method based on electromagnetic induction - Google Patents
Short range data transmission device and method based on electromagnetic induction Download PDFInfo
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- CN102045091A CN102045091A CN2010106182062A CN201010618206A CN102045091A CN 102045091 A CN102045091 A CN 102045091A CN 2010106182062 A CN2010106182062 A CN 2010106182062A CN 201010618206 A CN201010618206 A CN 201010618206A CN 102045091 A CN102045091 A CN 102045091A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a short range data transmission device based on electromagnetic induction, which comprises a data transmitting party and a data receiving party, wherein the data transmitting party modulates carriers according to data to be transmitted; modulation signals obtained through modulation are converted into analog signals; the analog signals are modulated and transmitted by a transmitting coil of the data transmitting party; when the data receiving party approaches the transmitting coil, an induction coil in the transmitting coil induces the analog signals transmitted by the data receiving party so as to receive the transmitted signals; and the transmitted signals are modulated and demodulated to form the transmitted data. The invention also discloses a short range data transmission method based on electromagnetic induction. The device can perform wireless data transmission in a short range (10cm) under the condition of lower power consumption.
Description
Technical field
The present invention relates to a kind of in-plant data transmission device and method, can be applicable to closely occasion such as transfer of data, range finding.
Background technology
Between the data receiver of communication and data receiver, can adopt wired mode or wireless mode to carry out communication.Wire communication is usually used in closer distance, but both sides need provide corresponding physics contact, owing to the restriction of space and standard, is unfavorable for adopting wired mode to carry out communication in some portable equipments (as communication terminal); The restriction that wireless telecommunications then do not have cable, lead to connect can be carried out the expansion of communication interface easily, and the signal of telecommunication can be transmitted larger distance.
But in some occasion, when particularly relating to data security, the effective range of wireless telecommunications need be limited within the nearer distance (＜10cm), existing wireless telecommunications means can not be carried out better controlled to communication distance.
In order to realize safe wireless telecommunications, data receiver and data receiver can transmit some control informations by some accessory channel.Before carrying out wireless telecommunications, data receiver sends control information by accessory channel, and the data receiver receives and sets up wireless telecommunications again after the control information of accessory channel and connect.After communication connects foundation, data receiver transmits the information such as being connected heartbeat of keeping of wireless telecommunications with the data receiver by accessory channel, when exceeding the effective communication scope, the data receiver promptly disconnects the wireless connections of setting up with data receiver because of receiving the information such as connecting heartbeat of keeping by accessory channel.By accessory channel, the distance of wireless telecommunications can be controlled within the effective range.
Summary of the invention
In order to realize the wireless telecommunications under the situation closely, the invention provides a kind of data transmission device and method based on electromagnetic induction, these apparatus and method can be set up accessory channel for wireless telecommunications, thereby the restriction of the effective range of wireless telecommunications is had in the nearer distance (＜10cm).
A kind of closely data transmission device based on electromagnetic induction comprises data receiver and data receiver.
Described data receiver comprises microprocessor MCU, D/A conversion circuit DAC, sends signal conditioning circuit and sends coil.Microprocessor MCU modulates carrier wave according to the digital signal that will send, modulation signal is converted to analog signal by D/A conversion circuit DAC, after described transmission signal conditioning circuit is nursed one's health, output shape and amplitude all satisfy the signal of wireless transmission distance requirement, send by sending coil.
The data that the present invention will be transmitted are digital signal, before transmission, digital signal need be modulated on the analog signal (carrier wave), are suitable for the modulation signal of wireless transmission with generation.Described data receiver adopts microprocessor MCU according to the digital signal that will send carrier wave to be modulated, and carrier wave is the cyclical signal of 100Hz～100KHz.Described modulation system is frequency modulation or amplitude modulation.When adopting mode of frequency regulation, digital signaling zero respective frequencies A, digital signal 1 respective frequencies B; When adopting the amplitude modulation mode, digital 0 respective amplitude 0, data 1 respective amplitude of control information is the full width of cloth.
Described data receiver comprises induction coil, received signal conditioning circuit and microprocessor MCU.Described data receiver is during near the transmission coil of data receiver, described induction coil receives the analog signal that data receiver sends, this analog signal is nursed one's health through described signal conditioning circuit, thereby the shape of obtaining and amplitude all satisfy the required signal of data demodulates, and this signal carries out demodulation by microprocessor MCU.
Signal after described data receiver's the signal conditioning circuit conditioning remains analog signal, before demodulation, need be converted into digital signal, and conversion method can adopt comparator and A/D conversion circuit ADC.When adopting the comparator conversion, the analog signal of signal conditioning circuit output and reference voltage compare and obtain impulse wave, and this impulse wave is input to microprocessor MCU and carries out demodulation; When adopting A/D conversion circuit ADC, the analog signal of signal conditioning circuit output can be directly changed into digital signal, carries out demodulation by microprocessor MCU; For part microprocessor MCU, the analog signal of signal conditioning circuit output satisfies the input requirement of its I/O pin, and the I/O pin that the analog signal of signal conditioning circuit output can be input to microprocessor MCU carries out demodulation.
The present invention also provides a kind of closely data transmission method based on electromagnetic induction, comprises the steps:
1, data receiver is modulated (frequency modulation or amplitude modulation) according to data to be transmitted to carrier signal, and modulation signal sends by sending coil through the conditioning back.
2, the data receiver receives the modulation signal of transmission.
In the data receiver was in the effective field scope of the modulation signal that data receiver sends, data receiver's induction coil can be sensed the modulation signal that is sent, and receives.
3, the signal of demodulate reception obtains the data that transmitted.
The signal that receives of induction obtains and transmits the pulse signal of signal correction after relatively with reference voltage through nursing one's health after, thus the data that the built-in processor MCU pulse signals demodulation acquisition of data receiver is transmitted.
The method of the invention can be carried out closely the (＜10cm) wireless data transmission in the scope under the situation of lower power consumption.
Description of drawings
Fig. 1 is a schematic representation of apparatus of the present invention;
Fig. 2 is the logic diagram of the data receiver of device of the present invention;
Fig. 3 is embodiment 1 data receiver's of a device of the present invention logic diagram;
Fig. 4 is embodiment 2 data receivers' of a device of the present invention logic diagram;
Fig. 5 is embodiment 3 data receivers' of a device of the present invention logic diagram;
Embodiment
Below the specific embodiment of the present invention is done and elaborated.
The logic diagram of described data receiver as shown in Figure 2.Data receiver embedded micro-processor MCU 101, D/A conversion circuit DAC 102, signal conditioning circuit 103 and transmitting coil 104.Microprocessor MCU 101 is electrically connected with D/A conversion circuit DAC 102, and D/A conversion circuit DAC 102 is electrically connected with signal conditioning circuit 103, and signal conditioning circuit 103 is electrically connected with transmitting coil 104.Microprocessor MCU 101 produces the numeral output of modulation signal, and the modulation signal through D/A conversion circuit DAC 102 is converted to simulation sends from transmitting coil 104 after the signal process signal conditioning circuit 103 after the modulation is nursed one's health.
Described data receiver's first embodiment as shown in Figure 3.Data receiver's embedded micro-processor 203, comparator 204, signal conditioning circuit 202 and induction coil 201.Microprocessor MCU 203 is electrically connected with comparator 204, and comparator 204 is electrically connected with signal conditioning circuit 202, and signal conditioning circuit 202 is electrically connected with induction coil 201.Transfer to comparator 204 after modulation signal that induction coil 201 is sensed is nursed one's health through signal conditioning circuit 202 and compare with reference voltage, relatively the impulse wave that produces of back is input to microprocessor MCU 203 and carries out the data that demodulation obtains transmitting.
Described data receiver's second embodiment as shown in Figure 4.Data receiver's embedded micro-processor 203, A/D conversion circuit 205, signal conditioning circuit 202 and induction coil 201.Microprocessor MCU 203 is electrically connected with A/D conversion circuit 205, and A/D conversion circuit 205 is electrically connected with signal conditioning circuit 202, and signal conditioning circuit 202 is electrically connected with induction coil 201.Transfer to A/D conversion circuit 205 after the modulation signal that induction coil 201 is sensed is nursed one's health through signal conditioning circuit 202 and be converted to digital signal, the digital signal after the conversion is input to microprocessor MCU 203 and carries out the data that demodulation obtains transmitting.
Described data receiver's the 3rd embodiment as shown in Figure 5.Data receiver's embedded micro-processor 203, signal conditioning circuit 202 and induction coil 201.Microprocessor MCU 203 signal conditioning circuits 202 are electrically connected, and signal conditioning circuit 202 is electrically connected with induction coil 201.Be directly inputted to microprocessor MCU 203 after the modulation signal that induction coil 201 is sensed is nursed one's health through signal conditioning circuit 202 and carry out the data that demodulation obtains transmitting.
No matter be external comparator, external A/D conversion circuit or directly receive microprocessor that its basic principle all is that signal and reference signal after the conditioning are compared.External comparator is directly to compare analog signal, is higher than reference voltage and obtains signal 1, is lower than reference voltage and obtains signal 0; External ADC is the digital signal after relatively changing, and is higher than certain value and thinks signal 1, and it is main for being signal 0 to be lower than certain value, and this threshold value can think to be exactly a reference voltage; Directly receive microprocessor, this pin is actually a digital input pin of microprocessor, and this pin can be thought digital signal 1 to the voltage signal that is higher than a certain level, is lower than certain voltage and thinks digital signaling zero.
Claims (9)
1. closely data transmission device based on electromagnetic induction, comprise data receiver and data receiver, described data receiver is modulated carrier wave according to data to be sent, the modulation signal that modulation obtains is converted to analog signal earlier, transmission coil by data receiver sends after nursing one's health again, described data receiver is during near described transmission coil, induction coil is wherein sensed the analog signal that the data receiver sends, thereby receive described transmission signal, after conditioning and demodulation, promptly obtain the data that transmit again.
2. data transmission device according to claim 1, it is characterized in that, described data receiver comprises the first microprocessor (101) that is electrically connected successively, D/A conversion circuit (102), first signal conditioning circuit (103) and transmitting coil (104), described first microprocessor (101) is realized the modulation to carrier wave, the modulation signal that modulation obtains is converted to analog signal by described D/A conversion circuit (102), described first signal conditioning circuit (103) is nursed one's health the analog signal of conversion, in order to send by described transmission coil (104).
3. data transmission device according to claim 1 and 2, it is characterized in that, described data receiver comprises second microprocessor (203) that is electrically connected successively, comparator (204), secondary signal modulate circuit (202) and induction coil (201), described induction coil (201) induction receives described transmission signal, and the described secondary signal modulate circuit of process (202) is nursed one's health, signal and reference voltage after described comparator (204) will be nursed one's health compare, the impulse wave that produces relatively is input to described second microprocessor (203) and carries out demodulation, the data that obtain transmitting.
4. data transmission device according to claim 1 and 2, it is characterized in that, described data receiver comprises second microprocessor (203) that is electrically connected successively, A/D conversion circuit (205), secondary signal modulate circuit (202) and induction coil (201), described induction coil (201) induction receives described transmission signal, and the described secondary signal modulate circuit of process (202) is nursed one's health, conversion of signals after described A/D conversion circuit (205) will be nursed one's health is a digital signal, digital signal after the conversion is input to described second microprocessor (203) and carries out demodulation, the data that obtain transmitting.
5. according to claim 1 and 2 described data transmission devices, it is characterized in that, described data receiver comprises microprocessor (203), signal conditioning circuit (202) and the induction coil (201) that is electrically connected successively, be directly inputted to described second microprocessor (203) after the analog signal that described induction coil (201) is sensed is nursed one's health through described secondary signal modulate circuit (202) and carry out demodulation, the data that obtain transmitting.
6. the closely data transmission method based on electromagnetic induction comprises the steps:
(1) data receiver is modulated carrier signal according to data to be transmitted, and modulation signal sends through the transmission coil of conditioning back by data receiver;
(2) data receiver receives the modulation signal of transmission.
In the time of in the data receiver is in the effective field scope that data receiver sends coil, data receiver's induction coil can be sensed the modulation signal that is sent, and receives;
(3) signal of data receiver's demodulate reception obtains the data transmitted.
Thereby the data that the signal that induction receives is transmitted through the demodulation acquisition after conditioning.
7. data transmission method according to claim 6, it is characterized in that, in the described step (3), the signal that data receiver's induction receives is after conditioning, through comparing the pulse signal that obtains and transmit signal correction with reference voltage, the built-in microprocessor pulse signals of data receiver is carried out demodulation, thereby obtains the data that data receiver transmits.
8. data transmission method according to claim 7 is characterized in that, relatively the realizing by comparator of described and reference voltage.
9. data transmission method according to claim 7 is characterized in that, relatively the realizing by A/D conversion circuit of described and reference voltage.
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Cited By (8)
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| CN102780953A (en) * | 2011-05-06 | 2012-11-14 | 奥迪康有限公司 | Receiver and method for retrieving an information signal from a magnetic induction signal |
| CN103546199A (en) * | 2012-07-17 | 2014-01-29 | 阿里巴巴集团控股有限公司 | Information transmission method and terminal equipment |
| CN103905093A (en) * | 2012-12-27 | 2014-07-02 | 联想(北京)有限公司 | Control method, control apparatus and electronic device |
| CN103925869A (en) * | 2014-03-31 | 2014-07-16 | 浙江大学 | Angle measuring method based on wireless power transmission and electromagnetic induction |
| CN105021163A (en) * | 2015-07-14 | 2015-11-04 | 深圳乐行天下科技有限公司 | Optical scanning device |
| CN106371089A (en) * | 2016-08-31 | 2017-02-01 | 上海阪辉新能源科技有限公司 | Wireless distance sensing device |
| CN108259069A (en) * | 2018-01-02 | 2018-07-06 | 上海闻泰电子科技有限公司 | Data transmission system |
| CN109120309A (en) * | 2017-06-23 | 2019-01-01 | 中兴通讯股份有限公司 | File acquisition method and device, file transmitting method and device, storage medium |
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| CN102780953B (en) * | 2011-05-06 | 2017-03-01 | 奥迪康有限公司 | For fetching receptor and the method for information signal from magnetic strength induction signal |
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| CN103546199B (en) * | 2012-07-17 | 2015-07-29 | 阿里巴巴集团控股有限公司 | Information transferring method and terminal equipment |
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| CN103925869B (en) * | 2014-03-31 | 2016-06-08 | 浙江大学 | Based on the angle measurement method of wireless power transmission and electromagnetic induction |
| CN105021163A (en) * | 2015-07-14 | 2015-11-04 | 深圳乐行天下科技有限公司 | Optical scanning device |
| CN106371089A (en) * | 2016-08-31 | 2017-02-01 | 上海阪辉新能源科技有限公司 | Wireless distance sensing device |
| CN109120309A (en) * | 2017-06-23 | 2019-01-01 | 中兴通讯股份有限公司 | File acquisition method and device, file transmitting method and device, storage medium |
| CN108259069A (en) * | 2018-01-02 | 2018-07-06 | 上海闻泰电子科技有限公司 | Data transmission system |
| CN108259069B (en) * | 2018-01-02 | 2021-08-24 | 上海闻泰电子科技有限公司 | Data transmission system |
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Application publication date: 20110504 |