A kind of portable high-gain wireless energy transmission machineTechnical field
The present invention relates to wireless energy transfer fields, more particularly, to a kind of portable high-gain wireless energy transmissionMachine.
Background technique
Wireless energy transfer (WPT:Wireless Power Transmission) technology gets rid of the constraint of cable, mainEnergy is wirelessly transferred to terminal by modes such as radiation, magnetic resonance, inductive couplings.In 1891,Nikola Tesla has carried out wireless power transfer experiment, it was demonstrated that the feasibility of wireless energy transfer.The U.S. and Japan are at thisThe research in a field is more deep, has significant progress in high power occasion, and repeatedly carried out high-power wireless energyTransmission experiment is measured, baby plane delivery of energy is given, has also lighted the LED light except 500 meters.
WPT technology is as a revolutionary technology, in the gradually maturing of high power occasion.For micromodule equipmentSpeech, there has also been preferable development for WPT technology.However the experiment of present WPT technology or application substantially can only laboratory intoRow is difficult because the transmitting terminal of most of WPT experiment is formed by connecting by the experimental facilities of laboratory valuableness in general fieldThe field test and business application of WPT technology are carried out in scape.
In today of WPT technology gradually commercialization, it is really necessary to invent have high-gain, high efficiency, highly directive, it is low atOriginally, portable wireless energy transmission machine, to meet the needs of test of WPT technology actual scene and commercialization.
Summary of the invention
The present invention is to solve the defect of the above prior art, provides a kind of portable wireless energy transmission machine, hasThe advantages of high-gain, high efficiency and highly directive wireless energy transmission.
To realize the above goal of the invention, the technical solution adopted is that:
A kind of portable high-gain wireless energy transmission machine, including power module, microstrip antenna, master controller further includeThere are DDS signal source module, emission of radio frequency signals module and power amplifier module；
Wherein the output end of power module and power amplifier module, master controller, emission of radio frequency signals module feeder earConnection；Master controller is connect with the control terminal of DDS signal source module, the output end and emission of radio frequency signals of DDS signal source moduleThe input terminal of module connects, and the output end of emission of radio frequency signals module passes through the input of SMA pin and box sub and power amplifier moduleThe output end of end connection, power amplifier module is connect by SMA pin and box sub with microstrip antenna.
The course of work of wireless energy transmission machine is as follows: power module is power amplifier module, master controller, radiofrequency signalTransmitting module provides low ripple, efficient stabilizes the output voltage.DDS signal source module generates phase according to the control of master controllerThe transmitting signal of waveform and frequency is answered, it is then input to emission of radio frequency signals module, emission of radio frequency signals by output endSignal generates corresponding RF energy to module based on the received, and the RF energy of generation is then sent to power amplifier module,Power amplifier module amplifies RF energy, and the RF energy being exaggerated then is radiated space by microstrip antennaIn.
In above scheme, emitted energy is just emitted by microstrip antenna after amplification, to increase receiving endIt receives power, increase transmission range.
Preferably, the power amplifier module includes two feeder ears, respectively drain electrode feeder ear and grid feeder ear；InstituteState wireless energy transmission machine further include have the first insurance circuit, the second insurance circuit, third insurance circuit, the 4th insurance circuit,Boost module, voltage reduction module, the first relay, the second relay and third relay；
The output end of power module passes through the first insurance circuit, boost module, the first relay and power amplifier moduleDrain feeder ear connection；
The output end of power module passes through the second insurance circuit, voltage reduction module, the second relay and power amplifier moduleThe connection of grid feeder ear；
The output end of power module passes through third insurance circuit, the feeder ear of third relay and emission of radio frequency signals moduleConnection；
The output end of power module is connected by the feeder ear of the 4th insurance circuit and master controller；
The master controller is connect with the control terminal of the first relay, the second relay and third relay.
In above scheme, since the circuit structure of wireless energy transmission machine includes master controller, so between all partsIt is specific as follows there are work-based logic relationship:
S1 power module is powered to master controller, and main controller controls make DDS signal source module generate respective waveforms and frequencyThe transmitting signal of rate, meanwhile, third relay is connected in main controller controls, emission of radio frequency signals module recovery power supply, radio frequencyThe transmitting signal that DDS signal source module generates is converted to corresponding RF energy by signal emission module；
S2. main controller controls make the first relay, the conducting of the second relay, so that power amplifier module is started to work,Power amplifier module amplifies RF energy, and the RF energy being exaggerated then is radiated space by microstrip antennaIn.
In above scheme, the first insurance circuit, the second insurance circuit, third insurance circuit, the 4th insurance circuit are addedEffect, which essentially consists in, prevents electric current is excessive from burning module.
Preferably due to which emission of radio frequency signals module, power amplifier module can generate biggish heat in the process of workAmount, heat dissipation not in time in the case where emission of radio frequency signals module, the temperature in power amplifier module can increase quickly, influenceEmission of radio frequency signals module, the normal work of power amplifier module.The work of transmitter is influenced in order to avoid temperature is excessively high, just mustEmission of radio frequency signals module, the temperature of power amplifier module must be monitored.For this purpose, wireless energy transmission provided by the inventionMachine is specially provided with the first temperature sensor and second temperature sensor, the first temperature sensor and second temperature sensor attachmentOn emission of radio frequency signals module, power amplifier module, and it connect it with master controller.First temperature sensor and the second temperatureDegree sensor is for acquiring emission of radio frequency signals module, the real time temperature situation of power amplifier module and sending it to main controlDevice, master controller is in the emission of radio frequency signals module acquired in real time, in the higher situation of the temperature of power amplifier module, Ke YitongIt crosses control and disconnects the first relay, the second relay and third relay to stop power amplifier module, emission of radio frequency signals mouldThe work of block, to avoid temperature excessively high and damage power amplifier module, emission of radio frequency signals module.
Preferably, the master controller selects single-chip microcontroller.
Preferably, for the ability for enhancing emission of radio frequency signals module, power amplifier module radiates, the radiofrequency signal hairPenetrate module, the bottom of power amplifier module is pasted with radiating copper sheet.
Preferably, the emission of radio frequency signals module is WiFi module, ZigBee wireless module or bluetooth radio module.
Preferably, the microstrip antenna is the microstrip directional antenna based on air chamber.Microstrip directional day based on air chamberLine has highly directive and preferable front and back ratio, and transmitting gain with higher and emission effciency, transmitting gain reach8.4dB, emission effciency reach 96.4%.
Compared with prior art, the beneficial effects of the present invention are:
1) wireless energy transmission machine provided by the invention has biggish frequency bandwidth, has preferable serious forgiveness.
2) wireless energy transmission machine provided by the invention uses independent power amplifier module, with higher, stableGain and saturation output power.
3) wireless energy transmission machine provided by the invention uses the microstrip directional antenna based on air chamber, small in size, andHas the advantages of high-gain, high radiation efficiency, highly directive.
4) wireless energy transmission machine integrated level provided by the invention is high, has advantage small in size, that light weight and cost is low.
Detailed description of the invention
Fig. 1 is the circuit topology figure of wireless energy transmission machine.
Fig. 2 is the control flow chart of master controller.
Specific embodiment
The attached figures are only used for illustrative purposes and cannot be understood as limitating the patent；
Below in conjunction with drawings and examples, the present invention is further elaborated.
Embodiment 1
As shown in Figure 1, the structure that the present invention provides wireless energy transmission machine mainly includes power supply structure, functional structure and auxiliaryHelp structure three parts.
Wherein, as shown in Figure 1, the component that this part of functional structure mainly includes has microstrip antenna, master controller, logic to openPass, DDS signal source module, emission of radio frequency signals module and power amplifier module.Wherein, master controller and DDS signal source moduleControl terminal connection, the output end of DDS signal source module connect with the input terminal of emission of radio frequency signals module, emission of radio frequency signalsThe output end of module is connected by the input terminal of SMA pin and box sub and power amplifier module, and the output end of power amplifier module is logicalSMA pin and box sub is crossed to connect with microstrip antenna.Wherein logic switch is for determining whether master controller works.
And as power supply structure this respect, as shown in Figure 1, mainly include master switch, power module, the first insurance circuit,Second insurance circuit, third insurance circuit, the 4th insurance circuit, boost module, voltage reduction module, the first relay, the second relayDevice and third relay, master switch is for determining whether power module powers outward.In the present embodiment, power amplifier module includesTwo feeder ears, respectively drain electrode feeder ear and grid feeder ear；Wherein, the output end of power module passes through the first insurance electricityThe drain electrode feeder ear connection on road, boost module, the first relay and power amplifier module；The output end of power module passes through secondThe grid feeder ear connection of insurance circuit, voltage reduction module, the second relay and power amplifier module；The output end of power module is logicalCross third insurance circuit, third relay is connect with the feeder ear of emission of radio frequency signals module；The output end of power module passes throughThe connection of the feeder ear of 4th insurance circuit and master controller；The master controller and the first relay, the second relay and thirdThe control terminal of relay connects.
Wherein, power module is used to provide 5V/1A and 5V/2.4A is always exported, and output has low ripple, higher efficiencyThe characteristics of, and as four insurance circuits, then the fuse of different capacity value can be used in practical applications.For example, powerThe best power supply value of the drain electrode feeder ear of amplification module is 6V, and electric current 0.5-2A, the voltage of grid feeder ear is 0.6V, then withThe performance number for the fuse that drain electrode feeder ear, grid feeder ear connect should be respectively 72V-1.35A and 72V-50mA.For another example,The performance number for the fuse connecting with emission of radio frequency signals module should be 30V-1100mA, to mention for emission of radio frequency signals moduleFor 1W power, or the performance number of fuse connecting with master controller should be 72V-500mA, provide power supply electricity for master controllerPressure.
As for supplementary structure this respect, as shown in Figure 1, mainly include the first temperature sensor and second temperature sensor,First temperature sensor and second temperature sensor are mounted on emission of radio frequency signals module, on power amplifier module, and make its withMaster controller connection.First temperature sensor and second temperature sensor are for acquiring emission of radio frequency signals module, power amplificationThe real time temperature situation of module simultaneously sends it to master controller, master controller the emission of radio frequency signals module acquired in real time,In the higher situation of the temperature of power amplifier module, can be disconnected by control the first relay, the second relay and third afterElectric appliance stops the work of power amplifier module and emission of radio frequency signals module, to avoid temperature excessively high and damage module.ThanSuch as, when the temperature of power amplifier module and emission of radio frequency signals module is more than 75 °, main controller controls close the first relayDevice, the second relay and third relay.In the specific implementation process, supplementary structure further includes having radiating copper sheet, radiating copperPiece is mounted on the bottom of emission of radio frequency signals module, power amplifier module, is used for emission of radio frequency signals module, power amplifier moduleBottom.
Fig. 2 is the control logic figure of master controller, and in conjunction with Fig. 2, the course of work that can obtain wireless energy transmission machine is as follows:
S1 power module is powered to master controller, and main controller controls make DDS signal source module generate respective waveforms and frequencyThe transmitting signal of rate, meanwhile, third relay is connected in main controller controls, emission of radio frequency signals module recovery power supply, radio frequencyThe transmitting signal that DDS signal source module generates is converted to corresponding RF energy by signal emission module；
S2. main controller controls make the first relay, the conducting of the second relay, so that power amplifier module is started to work,Power amplifier module amplifies RF energy, and the RF energy being exaggerated then is radiated space by microstrip antennaIn.
In above scheme, DDS signal source module can produce the sine wave of 0-40MHz, square wave；Or as needed, outputTwo sine waves or square wave, master controller be adjusted the transmitting frequency of signal of DDS signal source module output, peak-to-peak value andWaveform.Emission of radio frequency signals module can produce the WIFI signal of 20-24dBm, adjustable in WIFI frequency range larger range frequency, havePreferable serious forgiveness.Power amplifier module has super large bandwidth, has preferable serious forgiveness, and power amplifier module has 34dBmSaturation output power and 32dBm 1dB compression point；The power amplifier module gain ranging with higher, gain 10-31dB。
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pairThe restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above descriptionTo make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all thisMade any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of inventionProtection scope within.