CN204697059U

CN204697059U - Near field communication means

Info

Publication number: CN204697059U
Application number: CN201520342382.6U
Authority: CN
Inventors: 钟志明; 叶隽; 刘瑞谦
Original assignee: XIAMEN INNOV INFORMATION TECHNOLOGY Co Ltd
Current assignee: XIAMEN INNOV INFORMATION TECHNOLOGY Co Ltd
Priority date: 2015-05-25
Filing date: 2015-05-25
Publication date: 2015-10-07
Anticipated expiration: 2025-05-25

Abstract

The utility model provides a kind of near field communication means, comprising: MCU module, oscillating circuit and comparator, and the output of described MCU module is electrically connected with oscillating circuit; Oscillating circuit is electrically connected with the first input end of comparator, and the output of comparator is electrically connected with the input of MCU module; When signal is launched, MCU module launches the signal of telecommunication, and the signal of telecommunication vibrates through oscillating circuit, produces and emitting electromagnetic wave; During Signal reception, induced electricity magnetic wave generates the signal of telecommunication, and the signal of telecommunication produces vibration at oscillating circuit, and the signal of telecommunication after vibration is compared by comparator and exports MCU module to.

Description

Near field communication means

Technical field

The utility model relates to wireless communication field, particularly relates to a kind of near field communication means.

Background technology

Current near field communication means, or need special radio frequency chip (as 13.56MHz RFID technique), or need complicated waveform transformation circuit (as 125KHz RFID technique), cost is all higher, and uses dumb.

Application number be 201210023614.2 patent document disclose a kind of near field communication system, comprise a pair near-field communication equipment, be provided with the front surface of display floater and the rear surface relative with front surface above each near-field communication equipment has, and be provided with the battery lead plate being called field coupled device that can perform mutual field coupled in back-surface side; Closer to each other and the distance between the field coupled device of near-field communication equipment in the rear surface of two near-field communication equipments is such as within 3cm, the change of the induction field then produced by a field coupled device is detected by another field coupled device, thus between near-field communication equipment, perform electric field communication.

Summary of the invention

Technical problem to be solved in the utility model is: provide a kind of near field communication means, when low cost, can realize near-field communication neatly.

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:

A kind of near field communication means, comprising: MCU module, oscillating circuit and comparator, the output of described MCU module is electrically connected with oscillating circuit; Oscillating circuit is electrically connected with the first input end of comparator, and the output of comparator is electrically connected with the input of MCU module.

The beneficial effects of the utility model are, the output of MCU module is electrically connected with oscillating circuit, thus MCU module produces vibration when launching the signal of telecommunication mated with oscillating circuit, form electromagnetic radiation in the air, as long as the signal of telecommunication mated with oscillating circuit can be launched; Oscillating circuit is electrically connected with the first input end of comparator, thus compares by comparator the signal that oscillating circuit produces and export satisfactory electric signal waveform to MCU module, thus the reception of settling signal; Device is simple, without the need to designing special chip, does not also need complicated waveform transformation circuit.

Accompanying drawing explanation

Fig. 1 is the utility model embodiment one near field communication means structure chart;

Fig. 2 is the utility model embodiment one near field communication means circuit theory diagrams;

Fig. 3 is the flow chart that the utility model embodiment two near field communication method signal is launched;

Fig. 4 is the flow chart of the utility model embodiment two near field communication method Signal reception.

Label declaration:

1, MCU module; 2, oscillating circuit; 3, comparator.

Embodiment

By describing technology contents of the present utility model in detail, realized object and effect, accompanying drawing is coordinated to be explained below in conjunction with execution mode.

The design of the utility model most critical is: the signal of telecommunication is vibrated by oscillating circuit, produces and emitting electromagnetic wave; The signal of telecommunication after oscillating circuit vibration compares the satisfactory signal of telecommunication of output through comparator.

The explanation of technical terms that the utility model relates to:

Please refer to Fig. 1 and Fig. 2,

A kind of near field communication means, comprising: MCU module 1, oscillating circuit 2 and comparator 3, the output of described MCU module 1 is electrically connected with oscillating circuit 2; Oscillating circuit 2 is electrically connected with the first input end of comparator 3, and the output of comparator 3 is electrically connected with the input of MCU module 1.

The beneficial effect of above-mentioned near field communication means is, the output of MCU module 1 is electrically connected with oscillating circuit 2, thus MCU module 1 produces vibration when launching the signal of telecommunication mated with oscillating circuit 2, form electromagnetic radiation in the air, as long as the signal of telecommunication mated with oscillating circuit 2 can be launched; Oscillating circuit 2 is electrically connected with the first input end of comparator 3, thus compares by comparator 3 signal waveform that oscillating circuit 2 produces and export the satisfactory signal of telecommunication to MCU module 1, thus the reception of settling signal; Device is simple, without the need to designing special chip, does not also need complicated waveform transformation circuit.

Further, described oscillating circuit 2 comprises the first resistance R1, electric capacity C and inductance L, and described electric capacity C, the first resistance R1 and inductance L are electrically connected successively.

Further, described inductance L is wire-wound inductor.

From foregoing description, described inductance L can be used as emission source or the reception antenna of near field electromagnetic ripple.

Further, described comparator 3 also comprises the second input, described second input electrical connection generating circuit from reference voltage.

From foregoing description, the voltage that comparator 3 is produced by comparison reference voltage and oscillating circuit 2 exports the signal of telecommunication.

Further, described electric capacity C, the first resistance R1 and inductance L are series connection.

Further, described electric capacity C, the first resistance R1 and inductance L are in parallel.

Further, described generating circuit from reference voltage comprises: power supply VCC, the second resistance R2 and the 3rd resistance R3, and described second resistance R2 and the 3rd resistance R3 is series between power supply and ground.

From foregoing description, generating circuit from reference voltage by dividing potential drop for comparator provides reference voltage.

Please refer to Fig. 3 and Fig. 4,

A kind of near field communication method that above-mentioned near field communication means is corresponding, comprises signal and launches and Signal reception,

Described signal transmitting comprises:

S11, MCU module launch the signal of telecommunication;

S12, the signal of telecommunication vibrate through oscillating circuit, produce and emitting electromagnetic wave;

Described Signal reception comprises:

S21, induced electricity magnetic wave generate the signal of telecommunication;

S22, the signal of telecommunication produce vibration at oscillating circuit;

The signal of telecommunication after S23, vibration is compared by comparator and exports MCU module to.

The beneficial effect of above-mentioned near field communication method is: the signal of telecommunication that MCU module is launched generates electromagnetic waves through oscillating circuit vibration, is transmitted into aerial, the transmitting of settling signal; Respond to aerial electromagnetic wave and generate the signal of telecommunication, the signal of telecommunication compares its waveform by comparator after vibration, exports the satisfactory signal of telecommunication to MCU module, thus the reception of settling signal; Simple and flexible.

Further, comparator is by comparing the signal of telecommunication after vibration and reference voltage generation output.

Please refer to Fig. 1 and Fig. 2, embodiment one of the present utility model is:

A kind of near field communication means, comprising: MCU module 1, oscillating circuit 2 and comparator 3, the output of described MCU module 1 is electrically connected with oscillating circuit 2; Oscillating circuit 2 is electrically connected with the first input end of comparator 3, and the output of comparator 3 is electrically connected with the input of MCU module 1; Described oscillating circuit 2 comprises the first resistance R1, electric capacity C and inductance L, and described electric capacity C, the first resistance R1 and inductance L are electrically connected successively, and described electric capacity C, the first resistance R1 and inductance L can be that to connect also can be in parallel; Described inductance L is wire-wound inductor; Described comparator 3 also comprises the second input, described second input electrical connection generating circuit from reference voltage; Described generating circuit from reference voltage comprises: power supply, the second resistance R2 and the 3rd resistance R3, and described second resistance R2 and the 3rd resistance R3 is series between power supply and ground.

Oscillating circuit is made up of electric capacity C, the first resistance and inductance L, wherein electric capacity C and inductance L determine frequency of oscillation jointly, this frequency is consistent with the signal frequency that MCU module 1 is launched, and the first resistance R1 provides circuit damping, limits oscillation amplitude and oscillatory extinction coefficient; Described inductance L is wire-wound inductor, can be used as emission source or the reception antenna of near field electromagnetic ripple.

When near field communication means is in emission state, MCU module 1 launches the signal of telecommunication, and the described signal of telecommunication generates electromagnetic waves after oscillating circuit 2 vibrates, and the electromagnetic wave of generation is transmitted in the air by inductance L; When near field communication means is in accepting state, inductance L responds to the generation signal of telecommunication in magnetic field, the signal of telecommunication wherein mated with oscillating circuit 2 vibrates through oscillating circuit 2, the signal of telecommunication after vibration samples comparator 3 by the first input end of comparator 3, reference voltage is from the second input input comparator of comparator 3, comparator 3 determines its output voltage by the voltage levels comparing first input end and the input of two inputs, and the voltage signal of output is transferred to MCU module 1.

Please refer to Fig. 3 and Fig. 4, embodiment two of the present utility model is:

A kind of near field communication method, comprises signal and launches and Signal reception,

Described signal transmitting comprises:

MCU module launches the signal of telecommunication;

The signal of telecommunication vibrates through oscillating circuit, produces and emitting electromagnetic wave;

Described Signal reception comprises:

Induced electricity magnetic wave generates the signal of telecommunication;

The signal of telecommunication produces vibration at oscillating circuit;

The signal of telecommunication after vibration is compared by comparator and exports MCU module to; Comparator produces export by comparing the signal of telecommunication after vibration and reference voltage, and by the electric signal transmission that exports to MCU module.

In sum, the near field communication means that the utility model provides, MCU module is launched the signal that mates with oscillating circuit and is vibrated through oscillating circuit and generates electromagnetic waves, and by the inductive emitter in oscillating circuit in the air, thus launched by signal, and do not need extra antenna; Inductance in oscillating circuit senses electromagnetic wave and generates the signal of telecommunication, and the signal oscillations post-sampling mated with oscillating circuit is to comparator, thus remove and the unmatched signal of telecommunication of oscillating circuit, compare with reference voltage through comparator after letter after vibration, thus the satisfactory electric signal transmission of final output is to MCU unit, thus receive the signal meeting coupling.

The foregoing is only embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every equivalents utilizing the utility model specification and accompanying drawing content to do; or be directly or indirectly used in relevant technical field, be all in like manner included in scope of patent protection of the present utility model.

Claims

1. A near-field communication device, characterized in that, comprising: an MCU module, an oscillating circuit and a comparator, the output of the MCU module is electrically connected to the oscillating circuit; the oscillating circuit is electrically connected to the first input of the comparator, The output terminal of the comparator is electrically connected with the input terminal of the MCU module.

2 . The near field communication device according to claim 1 , wherein the oscillating circuit comprises a first resistor, a capacitor, and an inductor, and the capacitor, the first resistor, and the inductor are electrically connected in sequence. 3 .

3. The near field communication device according to claim 2, wherein the inductance is a wire wound inductance.

4. The near field communication device according to claim 1, wherein the comparator further comprises a second input terminal, and the second input terminal is electrically connected to a reference voltage generating circuit.

5. The near field communication device according to claim 2, wherein the capacitor, the first resistor and the inductor are connected in series.

6. The near field communication device according to claim 2, wherein the capacitor, the first resistor and the inductor are connected in parallel.

7. The near field communication device according to claim 4, wherein the reference voltage generation circuit comprises: a power supply, a second resistor and a third resistor, the second resistor and the third resistor are connected in series between the power supply and the ground between.