CN101447120A - Remote control system without standby power consumption based on radio frequency identification and remote control method - Google Patents
Remote control system without standby power consumption based on radio frequency identification and remote control method Download PDFInfo
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Abstract
本发明属于无线遥控技术领域，涉及一种基于无线射频识别的零待机功耗遥控系统，包括遥控器和至少一个执行器，其中，所述的遥控器用于发射对执行器进行控制的射频波信号，并接收来自控制器的反馈信号；所述执行器用于接收射频能量和接收来自遥控器的射频波信号，一方面将射频能量转换成直流稳定工作电压，以向自身供电，另一方面根据遥控器发来的射频波信号所携带的控制信息，驱动电子开关以及各执行电路执行相应的控制动作。本发明同时提供一种此种遥控系统所采用的遥控方法。采用本发明的遥控系统和遥控方法，能够真正实现电器待机状态下完全与市电断开，从而达到了节能的目的。
The invention belongs to the technical field of wireless remote control, and relates to a zero-standby power consumption remote control system based on radio frequency identification, including a remote controller and at least one actuator, wherein the remote controller is used to transmit radio frequency wave signals for controlling the actuator , and receive feedback signals from the controller; the actuator is used to receive radio frequency energy and receive radio frequency wave signals from the remote control, on the one hand, convert the radio frequency energy into DC stable working voltage to supply power to itself, on the other hand, according to the remote control The control information carried by the radio frequency signal sent by the device drives the electronic switch and each execution circuit to perform corresponding control actions. The invention also provides a remote control method adopted by the remote control system. By adopting the remote control system and the remote control method of the present invention, it is possible to completely disconnect the electric appliance from the mains in the standby state, thereby achieving the purpose of energy saving.
Description
Technical field
The invention belongs to the wireless remote control technology field, relate to a kind of telechirics.
Background technology
Wireless remote control is meant the noncontact Long-distance Control of realization to controlled object, is widely used in Industry Control, Aero-Space, field of household appliances.Telechirics generally is made up of telepilot and actuator two parts.Telepilot generally is made up of several parts such as instruction key, order number circuit, modulation circuit, driving circuit, radiating circuits.The order number circuit produces the corresponding instruction coded signal, and the order number signal is modulated carrier wave, is undertaken outwards being launched by radiating circuit after the power amplification by driving circuit again.Actuator generally is made up of several parts of receiving circuit, amplifying circuit, demodulator circuit, instruction decoding circuit, driving circuit and executive circuit.Receiving circuit receives the modulated coded order signal of telepilot emission, and is sent to demodulator circuit after amplifying.Demodulator circuit is reduced to coded signal with the modulation signal demodulation.Command decoder is deciphered the coded order signal, drives the operation that executive circuit is realized various instructions by driving circuit at last.At present, the Jue Daduoshuo instruction transmission mode that wireless remote-control system adopted all is the unidirectional sending mode from the telepilot to the actuator.
Along with improving constantly and office automation, informationalized deepening continuously of family life quality, increasing family and office electric equipment have all possessed distant control function.When people enjoyed satisfied life and conveniently work, the remote control standby power problems of electric equipment was also put in face of the people.Remote control standby power consumption (hereinafter to be referred as stand-by power consumption) is meant that electric equipment after the shutdown that uses a teleswitch, is the function that realizes that remote control is at any time opened, and electrical equipment still need keep the energy that part consumed of work.In total electric energy that electric equipment consumed, this part energy consumption is counted as dead wight loss.The survey report of Organization for International Economic Cooperation claims that the energy that various countries consume because of standby accounts for 3% to 13% of energy consumption sum, and the standby energy consumption of China is higher than average level.A sample survey of China CECP shows that the average standby power consumption of Chinese city family has accounted for about 10% of the total power consumption of family, is equivalent to " pilot burner " that each family is using one 15 to 30 watts.
With the air-conditioning is example, estimate according to the data that family's sample survey of the energy-conservation association of China provides, average standby energy consumption power is 3.47 watts, used calculating in two months in 1 year by an air-conditioning, the annual unused time reaches 7300 hours, most of user still is communicated with power supply when shutdown, be in holding state, one air-conditioning year standby energy consumption just reach 25 kilowatt hours, air-conditioning recoverable amount with 1.3 hundred million in the whole nation is estimated, the unconscious power consumption that the annual only air-conditioning standby in the whole nation is caused just reaches more than 3,000,000,000 kilowatt hours, is equivalent to the annual electricity generating capacity of a medium-sized water-power plant.
At present, the energy-conservation problem that become international, the Chinese government also is devoted to build " conservation-minded society ".As an important applied field of wireless remote control, the low-power-consumption remote control standby method of family expenses and office electric equipment more and more is subjected to people's attention.
Most of families and the employed power supply of office electric equipment all are Switching Power Supplies.Switching Power Supply is for linear power supply, and its principle of work is: 1. the AC power input becomes direct current through rectifying and wave-filtering; 2. by high-frequency PWM (pulse-length modulation) Signal-controlled switch pipe, this direct current is added on the elementary winding of switch transformer; 3. the switch transformer secondary winding induces HF voltage, through the rectifying and wave-filtering supply load; 4. output feeds back to control circuit by certain circuit, and control PWM dutycycle is to reach the purpose of voltage stabilizing.With respect to traditional linear power supply, Switching Power Supply has higher power-efficient, can reduce power attenuation effectively.
The power attenuation of Switching Power Supply mainly is divided into switching loss and conduction loss two classes, specifically comprises: switching tube turn-on consumption, switching tube turn-off power loss, switching tube conduction loss, ohmic loss (voltage detecting, current detecting and startup), diode losses, transformer and inductor loss, condenser loss etc.At holding state, main circuit current is less, so switching tube conduction loss, diode losses are very little.Loss this moment is mainly opened with turn-off power loss, transformer and inductor loss, condenser loss, ohmic loss etc. by switching tube and is constituted, and wherein most of loss is increased with the increase of frequency.In addition, responsible remote controller signal receives the microprocessor of handling also needs to keep power supply at holding state.
The technology of traditional reduction Switching Power Supply stand-by power consumption mainly comprises standby frequency reducing and standby burst technology.Standby frequency reducing technology is to utilize the frequency that reduces oscillator under the holding state to realize the standby power limitation function; The standby burst technology is to adopt step working method to realize the technology of low standby power loss.In addition, the discrete component that adopts low energy-consumption electronic device and integrated chip to replace in the circuit also can reduce idling consumption.
Though adopt above traditional power supply standby power method for limiting can reduce the stand-by power consumption of electric equipment to a certain extent, but because electrical equipment incomplete and civil power disconnection under holding state, so can't fundamentally eliminate these meaningless energy losses.
(Radio Frequency Identification, RFID) technology is a kind of of automatic identification technology to radio-frequency (RF) identification, carries out the noncontact bidirectional data communication by wireless radio frequency mode, and related data is discerned and obtained to target.
The most basic rfid system is made up of three parts:
1. electronic tag: electronic tag is being stored the relevant information that need be identified article, is placed on usually on the article that need identification, and its institute's canned data can be read and write by the noncontact mode by recognizer.
2. recognizer: recognizer is the equipment that can utilize radio-frequency technique read-write electronic labeling information.
3. antenna: antenna is the equipment that transmits and receives radiofrequency signal between electronic tag and recognizer.At electronic tag and recognizer two ends an antenna is arranged respectively.
The basic thought of passive RFID system is: oneself does not have power supply electronic tag, and its work capacity need obtain from the radio frequency beam that recognizer sends.Remote-controlled power switch part among the present invention just is being based on this NE BY ENERGY TRANSFER and obtaining mode realization.
The concise and to the point workflow of passive RFID system is as follows: recognizer produces induction current by the radiofrequency signal of emitting antenna transmission certain frequency when label enters the emitting antenna perform region, label obtains energy and is activated; Label sends information such as self identification sign indicating number by built-in aerial; System's receiving antenna receives the carrier signal of sending from label, is sent to recognizer through the antenna adjustments device, and recognizer carries out the demodulation sign indicating number to the signal that receives, and delivers to the backstage main system then and carries out relevant treatment; Main system is judged the legitimacy of this card according to identification code, and makes corresponding processing and control at different settings, sends the action of command signal control executing mechanism.
Wireless sensor network (Wireless Sensor Network, WSN) form by being deployed in cheap microsensor nodes a large amount of in the monitored area, the network system of the self-organization of a multi-hop that forms by communication, its objective is the information of perceived object in perception collaboratively, collection and the processing network's coverage area, and send to the observer.Along with MEMS (micro electro mechanical system) (Micro-Electro-Mechanism System, MEMS), SOC (system on a chip) (SOC, Systemon Chip), the develop rapidly of radio communication and low-power-consumption embedded technology, the power consumption of WSN node and cost have all obtained further reduction.
Summary of the invention
The present invention is directed to the above-mentioned deficiency of prior art, a kind of zero stand-by power consumption telechirics is provided.Adopt telechirics of the present invention, can really realize complete and civil power disconnection under the electric appliance standby state, thereby reach purpose of energy saving.For this reason, the present invention adopts following technical scheme:
A kind of zero stand-by power consumption telechirics based on radio frequency identification comprises telepilot and at least one actuator, and wherein, described telepilot is used to launch the rf wave signal that actuator is controlled, and receives the feedback signal of self-controller; Described actuator is used for received RF energy and the rf wave signal that receives from telepilot, convert radio-frequency (RF) energy to the DC stabilization operating voltage on the one hand, to power to self, the entrained control information of rf wave signal of sending according to telepilot on the other hand drives electronic switch and each executive circuit and carries out the control corresponding action.
As further embodiment, the zero stand-by power consumption telechirics based on radio frequency identification of the present invention,
Described telepilot comprises antenna, radio-frequency module, microcontroller module, and described antenna is used to transmit and receive the rf wave signal; Described radio-frequency module comprises radio frequency receiving unit and radio-frequency transmissions part, is connected between microcontroller module and the antenna, is used for the modulation and demodulation signal; Described microcontroller module is used to receive the feedback signal that transmits from radio-frequency module, and decoding back obtains the relevant information of electrical equipment, and passes to radio-frequency module after being used for mailing to the control signal coding of electrical equipment, sends control signal corresponding to actuator;
Described actuator comprises antenna, radio-frequency module, microcontroller module, power supply generation module and electronic switch, and described antenna is used to transmit and receive the rf wave signal, and is used for the received RF energy; Described radio-frequency module comprises radio frequency receiving unit and radio-frequency transmissions part, is connected between microcontroller module and the antenna, is used for the modulation and demodulation signal; Described microcontroller module is used to receive the control signal that transmits from radio-frequency module, decoding rear drive electronic switch and each executive circuit are carried out the control corresponding action, and be used for sending feedback information to telepilot with passing to radio-frequency module behind the electrical equipment correlation behavior information coding; Described power supply generation module is used for the radio-frequency (RF) energy with antenna induction, is transformed into the DC stabilization operating voltage of actuator.
As preferred implementation, described telepilot microcontroller module comprises that microcontroller and coupled respectively coding-decoding circuit and local oscillation signal produce circuit, described coding-decoding circuit links to each other with microprocessor, be used for encoding according to the steering order that microprocessor transmits, formation offers the baseband signal of radio-frequency module, and sends to microprocessor after being used for the baseband signal that receives from radio-frequency module decoded;
Described telepilot radio-frequency module sending part branch comprises shaping circuit, amplitude limiter circuit, frequency mixer, bandwidth-limited circuit, power amplification circuit, the antennafier that connects successively, after the processing of signal through shaping circuit and amplitude limiter circuit of coding-decoding circuit output, form modulation signal with the local oscillation signal mixing, modulation signal amplifies through band-pass filter, power amplifier, being sent to antennafier again amplifies, form final transmitting, transmitting of transmitting of antennafier circuit delivered to antenna by circulator;
Described telepilot radio-frequency module receiving unit comprises 90 ° of phase shift power dividers, the identical demodulator circuit of two-way, voltage comparator, by circulator the signal that returns is passed to 90 ° of phase shift power dividers, with the signal branch two paths of signals that is orthogonal, this two paths of signals is delivered to the identical demodulator circuit of two-way simultaneously respectively and is handled; Signal after the two-way demodulator circuit is handled respectively amplifies after addition once more, after removing DC component, capacitive coupling delivers to voltage comparator, the reference voltage that voltage comparator will amplify complete restituted signal voltage in back and setting relatively after, be reduced into baseband signal, handle through delivering to coding-decoding circuit after the shaping.
Described actuator radio-frequency module sending part branch comprises modulation circuit and amplifying circuit, and the digital baseband coded signal that the microcontroller resume module is good carries out the ASK amplitude modulation(PAM), after amplifying, delivers to antenna transmission and gives telepilot;
Described actuator radio-frequency module receiving unit comprises that envelope produces circuit and detecting circuit, will carry out demodulation from the modulation signal that antenna receives, and recovers digital baseband signal, delivers to the microcontroller module again and carries out decoding processing;
Described actuator power supply generation module comprises electromagnetic coupled circuit, full-wave bridge rectifier circuit, low-pass filter circuit, mu balanced circuit, the amplitude limiter circuit that connects successively.
The present invention provides a kind of zero stand-by power consumption remote control thereof based on radio frequency identification simultaneously, this method is set up short haul connection between telepilot and at least one actuator, the electrical equipment that is subjected to actuator control is realized that zero stand-by power consumption starts and control, comprise the following steps: to launch the rf wave signal that actuator is controlled, and receive the feedback signal of self-controller by telepilot; By actuator received RF energy and the rf wave signal that receives from telepilot, convert radio-frequency (RF) energy to the DC stabilization operating voltage on the one hand, to power to self, the entrained control information of rf wave signal of sending on the other hand according to telepilot, drive electronic switch and each executive circuit and carry out the control corresponding action, the electronic switch that links to each other with electrical equipment to be controlled, complete and civil power disconnection under holding state.
The above-mentioned zero stand-by power consumption remote control thereof based on radio frequency identification specifically can comprise the following steps:
(1) telepilot microcontroller module will be passed to radio-frequency module after will mailing to the control signal coding of electrical equipment, send control signal corresponding to actuator;
(2) the telepilot radio-frequency module is modulated this control signal;
(3) control signal after the telepilot antenna will be modulated is launched in the mode of rf wave signal;
(4) the actuator antenna receives rf wave signal and the radio-frequency (RF) energy by the emission of telepilot antenna;
(5) actuator power supply generation module is transformed into the radio-frequency (RF) energy of antenna induction the DC stabilization operating voltage of actuator and starts actuator work step by step;
(6) the actuator radio-frequency module is demodulated to control signal with the rf wave signal that antenna receives;
(7) actuator microcontroller module receives the control signal that transmits from radio-frequency module, decoding rear drive electronic switch and each executive circuit are carried out the control corresponding action, and will pass to radio-frequency module behind the electrical equipment correlation behavior information coding, and send feedback signal by a day alignment telepilot;
(8) the telepilot antenna receives the feedback signal of being sent by actuator;
(9) this feedback signal of telepilot radio-frequency module demodulation;
(10) control module is used to receive the feedback signal that transmits from radio-frequency module, and the decoding back obtains the relevant information of electrical equipment.
Among the present invention, the rf wave signal is preferably the electromagnetic wave of ultrahigh frequency to microwave region; Can adopt short haul connection modes such as WSN, ZigBee, WiMax or bluetooth between telepilot and the actuator.
Telechirics of the present invention and remote control thereof have following outstanding technique effect:
1. adopted the powering mode of passive RFID system owing to the powering mode of telechirics under the holding state,, really realized the Zero-power-consumption standby of electrical equipment, saved a large amount of standby energy consumptions so the electrical equipment under the holding state is complete and electric main disconnects.
2. utilize the many tag recognition and the communication capacity of ultrahigh frequency RFID recognizer, can realize a plurality of electric equipments of telepilot remote control simultaneously.Adopt certain anti-collision algorithms just can avoid the collision problem of many electrical equipment remote control effectively.
3. utilize ultrahigh frequency/microwave two-way wireless communication pattern, can realize the information feedback of electrical equipment, as this machine operation conditions, payload security information, running environment parameter etc. to telecontrol panel.This bidirectional data communication pattern has changed the alternative order sending mode of conventional remote control, for the realization of expanded functions such as man-machine interaction, Based Intelligent Control provides the technology prerequisite.
4. the field of remote control of technology such as the data communication of WSN, network management being introduced electrical equipment can lay the first stone for the intellectuality of household and office.
Description of drawings
The overall hardware block diagram of Fig. 1 telepilot;
Fig. 2 telepilot structured flowchart;
Fig. 3 actuator structure block diagram;
Fig. 4 remote control system of TV set work synoptic diagram;
Fig. 5 telepilot radio-frequency module sending part parallel circuit schematic diagram;
Fig. 6 telepilot radio-frequency module receiving unit circuit theory diagrams;
Fig. 7 actuator radio-frequency module sending part parallel circuit schematic diagram;
Fig. 8 actuator radio-frequency module receiving unit circuit theory diagrams;
Fig. 9 actuator power supply generation module circuit theory diagrams;
The principle of work block diagram of Figure 10 SSR;
The realization circuit diagram of Figure 11 SSR.
Embodiment
The present invention utilizes rf wave energy that telepilot sends to provide work capacity for the electronic switch control module of electrical equipment inside, electronic switch is positioned at the electric main input end of electrical equipment, really realize complete and civil power disconnection under the electric appliance standby state, thereby reached purpose of energy saving.
The present invention with reference to the hardware configuration of WSN node, makes every effort at utmost reduce the work energy consumption of hardware cost and system in the design process of hardware of telechirics.
In addition, in the present invention, ultrahigh frequency or microwave wireless communication have been adopted in the two-way communication between telepilot and the actuator, communicate by letter different with the unidirectional infrared waves that conventional remote control systems is adopted.Functional requirement, frequency limitation and the cost etc. of considering native system are all multifactor, two-way wireless communication pattern between telepilot and the actuator can be specifically with reference to several comparatively ripe short-range wireless communication protocol, as WSN, ZigBee, WiMax, bluetooth etc.The pattern of this bidirectional data communication also provides possibility for the further function expansion of this telechirics.
Below in conjunction with drawings and Examples the present invention is further described.
1. overall technological scheme and hardware block diagram
In present design, telechirics should have following function or characteristics: 1. use this telechirics to switch between work/holding state by control apparatus, and when electrical equipment was in holding state, the power of consumption was zero; 2. use this telechirics can realize all distant control functions of traditional remote controller, promptly the user does not need to change use habit; 3. use this telechirics can realize that a telepilot controls a plurality of electrical appliances, thereby realize the network management of family and office electric equipment; 4. use this telechirics can realize man-machine two-way information interaction, for household and office intellectuality are laid a good foundation.
Designed whole telechirics based on above function and characteristics.The whole hardware of this telechirics comprises telepilot and two parts of actuator.Telepilot is responsible for producing and sending remote control command signal, refers generally to the telecontrol panel part in user's hand; Actuator is positioned at electrical equipment inside, is responsible for the relevant steering order of judging that execution receives.The remote-controlled power switch of this telechirics has partly adopted the design of passive RFID tags principle of work, and promptly actuator relies on the rf wave energy of telepilot emission to realize the operation of start fully, thereby has realized the zero-power of electric appliance standby.After electrical equipment enters duty, the operating voltage of actuator changes civil power into and provides, communication pattern between this moment telepilot and the actuator has adopted ultrahigh frequency/microwave wireless communication pattern (concrete realization can with reference to technology such as WSN, ZigBee, WiMax, bluetooths), makes system have stronger functional expansionary and lower operating cost.
The overall hardware block diagram of telepilot is as shown in Figure 1:
2. the composition of telepilot
The function of telepilot is that user's control commands is sent to actuator to realize corresponding distant control function, and the information such as the state of returning and option of operation that actuator can be sent in addition are presented on the panel display screen with for reference and select.Telepilot is made up of antenna, radio-frequency module, microcontroller module, button and display screen.
The telepilot structured flowchart is as shown in Figure 2:
(1) antenna
Antenna is the equipment that transmits and receives the rf wave signal.Under frequency of operation of determining and bandwidth condition, the rf wave that the antenna emission is produced by radio-frequency module, and receive the rf wave that reflects from the electrical equipment receiving end.
(2) radio-frequency module
Radio-frequency module is made up of sending module and receiver module, is responsible for transmitting and receiving rf wave.Launch by antenna by radio-frequency module modulation back from the baseband signal that the microcontroller module transmits; The rf wave signal that transmits from antenna is also by passing to the microcontroller module after the radio-frequency module demodulation.
(3) microcontroller module
The microcontroller module is made up of microcontroller, encoding and decoding and error correction circuit, clock and power supply.The feedback signal that it can the received RF module transmits, the decoding back obtains the relevant information of electrical equipment, passes to radio-frequency module after maybe will mailing to the control signal coding of electrical equipment, finishes control corresponding.
(4) button and display screen
Button is used to produce control signal, and the microcontroller module uses different baseband codings to represent different control signals.Display screen is used to show associative operation and option and various electrical equipment feedback informations etc.Button and display screen are the indispensable parts of telecontrol panel, need satisfy people's use habit during design.
3. the composition of actuator
Actuator is positioned at the inside of electric equipment.Its function is to receive the various steering orders that telepilot sends, and is discerned and judges back driving circuit execution correlation function, simultaneously the information such as electrical equipment state of storing in the storer is sent back to telepilot, and is for reference.Actuator is made up of antenna, radio-frequency module, microcontroller module, power supply generation module and electronic switch.
The actuator structure block diagram is as shown in Figure 3:
(1) antenna
Antenna is mainly used in and transmits and receives the rf wave signal.In addition, when electrical equipment was in holding state, the working power of actuator also came from the radio-frequency (RF) energy that antenna receives.
(2) radio-frequency module
Radio-frequency module is made up of sending module and receiver module, mainly finishes the modulation and demodulation function of signal.
(3) microcontroller module
The microcontroller module is made up of microcontroller, encoding and decoding and error correction circuit, storer, clock and reset circuit.The control signal that it can the received RF module transmits, the decoding back driving circuit is carried out the control corresponding action, or passes to radio-frequency module behind the electrical equipment correlation behavior information coding with memory stores, sends feedback information to telepilot.
(4) power supply generation module
Owing to adopted the powering mode of passive RFID tags under the electric appliance standby state, actuator needs a power supply generation module.The effect of this module is to respond to radio-frequency (RF) energy from the radio-frequency field of antenna ends, finally provides the DC stabilization operating voltage for actuator through corresponding circuit conversion.When electrical equipment switched to duty by holding state, this module quit work, and actuator changes mains-supplied into.
(5) electronic switch
Actuator is realized the switching of electrical equipment under work and holding state by the break-make of control electronic switch.Electronic switch is positioned at the electric main input end of electrical equipment, so when electrical equipment was in the remote control standby state, complete and civil power disconnected.Electronic switch can use controlled discrete on-off element such as controllable silicon, field effect transistor, triode, metal-oxide-semiconductor to realize, also can use assembling devices such as relay, contactor to realize.
4. the workflow of telechirics
With the televisor is example, and the workflow of this telechirics is as follows:
When (1) televisor is in holding state and civil power disconnect fully, each module of the inner actuator of televisor is in dormant state;
(2) as user during by the TV set power key on the telecontrol panel in setting about, the television startup instruction is launched by the antenna of telepilot through after the coded modulation;
(3) antenna of actuator is transformed to direct-flow steady voltage with the radio-frequency field energy of sensing through corresponding processing of circuit and offers microcontroller, the correlation module of actuator is activated and the status information of this televisor is returned to telepilot as confirmation, and communication link is set up;
(4) actuator send microcontroller after with the control signal demodulating and decoding that receives, and microcontroller is judged to be the relay closes that the starting-up signal rear drive is positioned at the electric main input end is communicated with power supply, and televisor enters open state;
(5) actuator changed mains-supplied into after televisor entered open state, and each module keeps state of activation, waited for other subsequent control instructions;
(6) actuator can be regularly sends information such as the running status as televisor of storing in the storer, TV guide to telepilot, and telepilot is presented at these information on the display screen, selects for the user.
The present invention is an example with a kind of typical zero stand-by power consumption telechirics based on the RFID technology, and its signal transmission frequency is 900MHz, below is that the circuit of its several key parts is formed and the principle of work description.
5. the realization of telepilot radio-frequency module
(1) circuit of sending module is formed
The circuit of this part is formed as shown in Figure 5.Its principle of work is as follows:
1. MCU receives the steering order from button, starts application program, and corresponding instruction is sent to coding-decoding circuit;
2. coding circuit is encoded according to the steering order that MCU transmits, and the formation baseband signal delivers to shaping circuit and amplitude limiter circuit is handled, and the signal after the processing is sent to frequency mixer (up-conversion);
3. the ASK modulation is carried out in frequency mixer baseband signal and local oscillation signal mixing that coding circuit is sent here;
4. modulation signal amplifies through band-pass filter, power amplifier, is sent to antennafier again and amplifies, and forms final transmitting;
5. circulator is delivered to antenna with the power signal that the antennafier circuit transmits, and sends to the remote control receiving end of electrical equipment.
(2) circuit of receiver module is formed
The receiving circuit of this part has adopted the zero intermediate frequency reception programme, and circuit is formed as shown in Figure 6.Its principle of work is as follows:
1. actuator is received the signal that telepilot sends, and obtains to be activated behind the energy, begins to carry out the control corresponding instruction, and the response message of returning is sent to the antenna of telepilot in the backscattered modulation mode;
2. behind the antenna receiving signal, the signal that returns is passed to 90 ° of phase shift power dividers, with the signal branch two-way that is orthogonal by circulator.This two paths of signals is delivered to two identical demodulator circuits simultaneously and is handled;
3. the signal after the two-way demodulator circuit is handled respectively amplifies after addition once more, after removing DC component, capacitive coupling delivers to voltage comparator, the reference voltage that voltage comparator will amplify complete restituted signal voltage in back and setting relatively after, be reduced into the baseband signal that the electrical equipment receiving end returns, handle through delivering to coding-decoding circuit after the shaping;
4. coding-decoding circuit is decoded the baseband signal that receives and is carried out CRC check, gives MCU then;
5. MCU is presented at the electrical equipment relevant information of receiving on the display screen, selects and reference for the user.
6. the realization of actuator radio-frequency module
(1) circuit of sending module is formed
As shown in Figure 7, this module mainly is made up of ASK modulation circuit and amplifier.Its major function is that the digital baseband coded signal that the microcontroller resume module is good carries out the ASK amplitude modulation(PAM), after amplifying, delivers to antenna transmission and gives telepilot.
(2) circuit of receiver module is formed
As shown in Figure 8, this module mainly is made up of envelope generation circuit and detecting circuit.The major function of this part is that the ASK am signals that will receive on the antenna carries out demodulation, recovers digital baseband signal, delivers to the microcontroller module again and carries out decoding processing.
(3) circuit of power supply generation module is formed
Because what antenna ends was sensed from radio-frequency field is the voltage source of an alternation, so need a current rectifying and wave filtering circuit to be translated into direct supply.Because the actuator internal circuit is the DC source except requiring power supply, also must be able to not surpass the voltage breakdown of devices such as metal-oxide-semiconductor, triode, so need to introduce the amplitude limit module.The circuit of power supply generation module is formed as shown in Figure 9.
7. the realization of electronic AC switch circuit
Electronic AC switch is responsible for the break-make of the mains supply of control apparatus, to realize the switching of electrical equipment between work and holding state.Electronic AC switch has a variety of implementations, and this patent only provides the circuit implementation method of a kind of solid-state relay (SSR).
Figure 10 is the principle of work block diagram of solid-state relay.See that on the whole SSR has two input ends and two output terminals, during work as long as add certain control signal at input end, " the leading to " and " breaking " between just can the control output end, realization switching function.Each functional module principle of work is as follows.
1. the function of coupled circuit is for the contact between input end and the output terminal among the disconnection SSR on circuit, to prevent the influence of output terminal to input end.The element that coupled circuit uses is a photo-coupler, and it is active in one's movements, the class of insulation height between the response speed height, input/output terminal.Because the load of input end is a light emitting diode, this makes the input end of SSR be easy to accomplish and the incoming signal level coupling, can directly be connected with the MCU output interface during use, controlled by logic level.
2. the function of trigger circuit is to produce satisfactory trigger pip, the driving switch circuit working, but, increased the zero passage control circuit because on-off circuit when not having the system circuit of special control, will produce Radio frequency interference (RFI) and pollute electrical network with higher hamonic wave or spike etc. for this reason.So-called " zero passage " is meant: when adding control signal, during alternating voltage zero-crossing, SSR is on-state; And after disconnecting control signal, when SSR will wait for the point of interface (zero potential) of the positive half cycle of alternating current and negative half period, SSR just was an off-state.This design can prevent the interference of higher hamonic wave and to the pollution of electrical network.
3. absorb circuit and design, generally use " R-C " series connection to absorb circuit or non-linear resistance (piezoresister) for impact and the interference to switching device bidirectional triode thyristor pipe such as the spike that prevents from from power supply, to transmit.
The realization circuit of concrete SSR electronic AC switch as shown in figure 11.
Claims (10)
1. the zero stand-by power consumption telechirics based on radio frequency identification comprises telepilot and at least one actuator, and wherein, described telepilot is used to launch the rf wave signal that actuator is controlled, and receives the feedback signal of self-controller; Described actuator is used for received RF energy and the rf wave signal that receives from telepilot, convert radio-frequency (RF) energy to the DC stabilization operating voltage on the one hand, to power to self, the entrained control information of rf wave signal of sending according to telepilot on the other hand drives electronic switch and each executive circuit and carries out the control corresponding action.
2. the zero stand-by power consumption telechirics based on radio frequency identification according to claim 1 is characterized in that described telepilot comprises antenna, radio-frequency module, microcontroller module, and described antenna is used to transmit and receive the rf wave signal; Described radio-frequency module comprises radio frequency receiving unit and radio-frequency transmissions part, is connected between microcontroller module and the antenna, is used for the modulation and demodulation signal; Described microcontroller module is used to receive the feedback signal that transmits from radio-frequency module, and decoding back obtains the relevant information of electrical equipment, and passes to radio-frequency module after being used for mailing to the control signal coding of electrical equipment, sends control signal corresponding to actuator;
Described actuator comprises antenna, radio-frequency module, microcontroller module, power supply generation module and electronic switch, and described antenna is used to transmit and receive the rf wave signal, and is used for the received RF energy; Described radio-frequency module comprises radio frequency receiving unit and radio-frequency transmissions part, is connected between microcontroller module and the antenna, is used for the modulation and demodulation signal; Described microcontroller module is used to receive the control signal that transmits from radio-frequency module, decoding rear drive electronic switch and each executive circuit are carried out the control corresponding action, and be used for sending feedback information to telepilot with passing to radio-frequency module behind the electrical equipment correlation behavior information coding; Described power supply generation module is used for the radio-frequency (RF) energy with antenna induction, is transformed into the DC stabilization operating voltage of actuator.
3. the zero stand-by power consumption telechirics based on radio frequency identification according to claim 2 is characterized in that,
Described telepilot microcontroller module comprises that microcontroller and coupled respectively coding-decoding circuit and local oscillation signal produce circuit, described coding-decoding circuit links to each other with microprocessor, be used for encoding according to the steering order that microprocessor transmits, formation offers the baseband signal of radio-frequency module, and sends to microprocessor after being used for the baseband signal that receives from radio-frequency module decoded;
Described telepilot radio-frequency module sending part branch comprises shaping circuit, amplitude limiter circuit, frequency mixer, bandwidth-limited circuit, power amplification circuit, the antennafier that connects successively, after the processing of signal through shaping circuit and amplitude limiter circuit of coding-decoding circuit output, form modulation signal with the local oscillation signal mixing, modulation signal amplifies through band-pass filter, power amplifier, being sent to antennafier again amplifies, form final transmitting, transmitting of transmitting of antennafier circuit delivered to antenna by circulator;
Described telepilot radio-frequency module receiving unit comprises 90 ° of phase shift power dividers, the identical demodulator circuit of two-way, voltage comparator, by circulator the signal that returns is passed to 90 ° of phase shift power dividers, with the signal branch two paths of signals that is orthogonal, this two paths of signals is delivered to the identical demodulator circuit of two-way simultaneously respectively and is handled; Signal after the two-way demodulator circuit is handled respectively amplifies after addition once more, after removing DC component, capacitive coupling delivers to voltage comparator, the reference voltage that voltage comparator will amplify complete restituted signal voltage in back and setting relatively after, be reduced into baseband signal, handle through delivering to coding-decoding circuit after the shaping.
4. the zero stand-by power consumption telechirics based on radio frequency identification according to claim 2 is characterized in that,
Described actuator radio-frequency module sending part branch comprises modulation circuit and amplifying circuit, and the digital baseband coded signal that the microcontroller resume module is good carries out the ASK amplitude modulation(PAM), after amplifying, delivers to antenna transmission and gives telepilot;
Described actuator radio-frequency module receiving unit comprises that envelope produces circuit and detecting circuit, will carry out demodulation from the modulation signal that antenna receives, and recovers digital baseband signal, delivers to the microcontroller module again and carries out decoding processing;
Described actuator power supply generation module comprises electromagnetic coupled circuit, full-wave bridge rectifier circuit, low-pass filter circuit, mu balanced circuit, the amplitude limiter circuit that connects successively.
5. according to any described zero stand-by power consumption telechirics of claim 1 to 4, it is characterized in that described rf wave signal is the electromagnetic wave that ultrahigh frequency arrives microwave region based on radio frequency identification.
6. according to any described zero stand-by power consumption telechirics of claim 1 to 4, it is characterized in that, adopt short haul connection modes such as WSN, ZigBee, WiMax or bluetooth between telepilot and the actuator based on radio frequency identification.
7. zero stand-by power consumption remote control thereof based on radio frequency identification, it is characterized in that, this method is set up short haul connection between telepilot and at least one actuator, the electrical equipment that is subjected to actuator control is realized that zero stand-by power consumption starts and control, comprise the following steps: to launch the rf wave signal that actuator is controlled, and receive the feedback signal of self-controller by telepilot; By actuator received RF energy and the rf wave signal that receives from telepilot, convert radio-frequency (RF) energy to the DC stabilization operating voltage on the one hand, to power to self, the entrained control information of rf wave signal of sending on the other hand according to telepilot, drive electronic switch and each executive circuit and carry out the control corresponding action, the electronic switch that links to each other with electrical equipment to be controlled, complete and civil power disconnection under holding state.
8. the zero stand-by power consumption remote control thereof based on radio frequency identification according to claim 7 is characterized in that described remote control thereof comprises the following steps:
(1) telepilot microcontroller module will be passed to radio-frequency module after will mailing to the control signal coding of electrical equipment, send control signal corresponding to actuator;
(2) the telepilot radio-frequency module is modulated this control signal;
(3) control signal after the telepilot antenna will be modulated is launched in the mode of rf wave signal;
(4) the actuator antenna receives rf wave signal and the radio-frequency (RF) energy by the emission of telepilot antenna;
(5) actuator power supply generation module is transformed into the radio-frequency (RF) energy of antenna induction the DC stabilization operating voltage of actuator and starts actuator work step by step;
(6) the actuator radio-frequency module is demodulated to control signal with the rf wave signal that antenna receives;
(7) actuator microcontroller module receives the control signal that transmits from radio-frequency module, decoding rear drive electronic switch and each executive circuit are carried out the control corresponding action, and will pass to radio-frequency module behind the electrical equipment correlation behavior information coding, and send feedback signal by a day alignment telepilot;
(8) the telepilot antenna receives the feedback signal of being sent by actuator;
(9) this feedback signal of telepilot radio-frequency module demodulation;
(10) control module is used to receive the feedback signal that transmits from radio-frequency module, and the decoding back obtains the relevant information of electrical equipment.
9. according to claim 7 or 8 described zero stand-by power consumption remote control thereofs, it is characterized in that described rf wave signal is the electromagnetic wave that ultrahigh frequency arrives microwave region based on radio frequency identification.
10. according to claim 7 or 8 described zero stand-by power consumption remote control thereofs, it is characterized in that, adopt short haul connection modes such as WSN, ZigBee, WiMax or bluetooth between telepilot and the actuator based on radio frequency identification.
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| CNA2008101543654A CN101447120A (en) | 2008-12-23 | 2008-12-23 | Remote control system without standby power consumption based on radio frequency identification and remote control method |
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Open date: 20090603 |