CN101894451B - Passive remote control unit and remote control method - Google Patents
Passive remote control unit and remote control method Download PDFInfo
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- CN101894451B CN101894451B CN 200910107464 CN200910107464A CN101894451B CN 101894451 B CN101894451 B CN 101894451B CN 200910107464 CN200910107464 CN 200910107464 CN 200910107464 A CN200910107464 A CN 200910107464A CN 101894451 B CN101894451 B CN 101894451B
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Abstract
The invention discloses a passive remote control unit and a remote control method. The passive remote control device comprises an antenna for receiving a first electromagnetic wave and emitting a second electromagnetic wave, and a surface acoustic wave sensor coupled with the antenna for converting the received first electromagnetic wave into a surface acoustic wave and converting the surface acoustic wave after processing into the second electromagnetic wave which is emitted by the antenna based on a remote control action. Based on a controlled device in the invention, the remote control method comprises the following steps: emitting the first electromagnetic wave; receiving the second electromagnetic wave which is delayed to be reflected back; and identifying the remote control action based on the second electromagnetic wave which is delayed to be reflected back and generating a corresponding remote control command based on the identified remote control action. The remote control unit in the invention utilizes the surface acoustic sensor to realize passive remote control so as to achieve full miniaturization and simplification and low manufacturing cost.
Description
Technical field
The present invention relates to wireless remote controller and remote control thereof, more particularly, relate to a kind of passive remote control unit and remote control thereof that utilizes surface acoustic wave (surface acoustic wave, SAW) technology.
Background technology
Household appliances such as televisor, VCD/DVD videocorder, sound equipment, karaoke machine, air conditioner etc. all use the operation of infrared and radio telepilot, and infrared remote controller need to use external power source, mostly uses the battery of two AAA for a long time.According to statistics, the annual refuse battery quantity that produces because of the use of telepilot is enough to around the earth four circles half, therefore the infrared and radio telepilot has become the significant burden of earth environmental protection up to billions of.And, the directive property of infrared data transmission also so that the use of infrared remote controller be very restricted.Therefore, less radio-frequency (RF) the telepilot technical development with non-directive characteristics comes into one's own gradually, and various high-order electronic products are equipped with the RF telepilot gradually.For example, the RF telepilot that is equipped with in more existing liquid crystal TV sets adopts the ZigBee Radio Transmission Technology, and wireless frequency is the 2.4GHz frequency band; The RF telepilot of Wii and PS3 game machine then adopts Bluetooth technology, and wireless frequency also is the 2.4GHz frequency band.But these RF telepilots are because need to have the rf processing circuitry of relative complex and semiconductor devices to produce remote signal, and still quite power consumption is therefore can't be designed to exempt from battery forms.Because the telepilot of existing use infrared ray or radio frequency data transmission technology all needs to use external power source, profile and the size of telepilot also are limited by very large.
Surface acoustic wave techniques is to utilize surface acoustic wave to come the emerging technology of the various functions of analog electronics.The principle of work of surface acoustic wave sensor is, the input transducer of piezoelectric substrate left end is transformed into surface acoustic wave by inverse piezoelectric effect with the electromagnetic wave of inputting, this surface acoustic wave is propagated along the piezoelectric substrate surface, and finally the output transducer by piezoelectric substrate the right is transformed into electromagnetic wave again with surface acoustic wave.By the acoustical signal of propagating at piezoelectric substrate is carried out various processing, surface acoustic wave sensor can utilize the characteristic of sound-electric transducing to realize various passive application.Because slow 100,000 times than electromagnetic wave of the velocity of propagation of surface acoustic wave, and easily take a sample on the travel path of surface acoustic wave and process, therefore, surface acoustic wave techniques can make electron device realize subminiaturization and simplification.
Summary of the invention
First technical matters that the present invention will solve is, need to use battery and defective that structure and shape are restricted for the telepilot of prior art, a kind of remote control recognition device that battery can be realized the passive remote control unit of distant control function and be mated that need not is provided.
Second technical matters to be solved by this invention be, utilizes infrared or radio frequency data transmission and so that telepilot needs the defective of charged pool, provide a kind of remote control thereof that can utilize passive remote control unit to carry out remote control for existing remote control thereof.
For solving above first technical matters, the invention provides a kind of passive remote control unit, comprising: an antenna, in order to receive one first electromagnetic wave and emission one second electromagnetic wave; One surface acoustic wave sensor is coupled to described antenna, converts surface acoustic wave in order to first electromagnetic wave that will receive, and converts described the second electromagnetic wave after described surface acoustic wave is processed to via described antenna transmission according to a remote control actions.In the preferred embodiment, described surface acoustic wave sensor comprises: put on the acoustic surface wave propagation space with a stress deformation body of the center resonant frequency of change surface acoustic wave in order to will push action; The surface acoustic wave that will convert to after surface acoustic wave also will be processed in order to first electromagnetic wave that will receive converts second an electromagnetic interdigital transducer to; To surface acoustic wave encode the reflection a reverberator.Described antenna is the coil antenna that is coupled on the described surface acoustic wave sensor.In another preferred embodiment, described surface acoustic wave sensor comprises: a substrate; Be located at the surface acoustic wave that will convert to after surface acoustic wave also will be processed with first electromagnetic wave that will receive in the described substrate and convert second an electromagnetic interdigital transducer to; Be located at the reverberator in the described substrate, described reverberator comprises one group of reflection bar that order is according to certain rules arranged, in order to reflected sound surface wave successively.And described substrate surface is provided with one group of contact, wherein the corresponding guidance command in each contact.
In order to solve above first technical matters, the present invention also provide a kind of be arranged at by in the equipment of remote control with a remote control recognition device with telechiric device cooperating of surface acoustic wave sensor, comprise: an antenna, in order to launch the first electromagnetic wave and reception from the second electromagnetic wave of described telechiric device; One signal processing module in order to process described the second electromagnetic wave, identifies remote control actions and generates corresponding guidance command based on the described remote control actions that identifies according to described the second electromagnetic wave.In the preferred embodiment, described signal processing module identifies an extruding action according to the skew of described the second electromagnetic center resonant frequency, and generates described extruding and move corresponding guidance command.Described signal processing module also can be further according to the time of the extruding action that identifies and the guidance command of number of times generation correspondence.In another preferred embodiment, described signal processing module is determined corresponding contact position according to the pulse that is attenuated in described the second electromagnetic wave or disappear, and the generation guidance command corresponding with described contact position.Described signal processing module also can become an identification code with other pulse code with the pulse that is attenuated in described the second electromagnetic wave or disappear, and generates the guidance command corresponding with described identification code.
In order to solve above first technical matters, the present invention provides again a kind of passive remote control unit, comprising: an antenna, in order to receive the first electromagnetic wave and a plurality of the second electromagnetic waves of emission; The array of a plurality of surface acoustic wave sensors, each surface acoustic wave sensor is coupled to described antenna, the first electromagnetic wave that each surface acoustic wave sensor in described a plurality of surface acoustic wave sensor will receive respectively converts surface acoustic wave to, and by each self-corresponding reverberator described surface acoustic wave is encoded and to convert described a plurality of the second electromagnetic wave after processing to via described antenna transmission; Wherein, any one carries out modulation treatment according to an extruding action to described surface acoustic wave and converts corresponding the second electromagnetic wave in described a plurality of surface acoustic wave sensor.In the preferred embodiment, described passive remote control unit also comprises a plurality of squeeze buttons of corresponding a plurality of remote control actions, and described a plurality of squeeze buttons are associated with described a plurality of surface acoustic wave sensors respectively.
In order to solve above first technical matters, the present invention also provide a kind of be arranged at by in the equipment of remote control with a remote control recognition device with telechiric device cooperating of a plurality of surface acoustic wave sensors, comprise: an antenna, in order to launch the first electromagnetic wave and reception from a plurality of second electromagnetic waves of described telechiric device; One signal processing module in order to process described a plurality of the second electromagnetic wave, identifies the extruding action to extract an identification code according to described a plurality of the second electromagnetic waves, judges corresponding remote control actions according to described identification code.In the preferred embodiment, skew occurs according to second electromagnetic center resonant frequency in described a plurality of the second electromagnetic waves and identifies described extruding action in described signal processing module.
In order to solve above second technical matters, the invention provides a kind of passive remote control thereof for passive remote control unit, described method comprises: receive the first electromagnetic wave; Convert described the first electromagnetic wave to surface acoustic wave, and according to a remote control actions described surface acoustic wave is processed; Convert the surface acoustic wave after the described processing to second electromagnetic wave; Launch described the second electromagnetic wave.In the preferred embodiment, described method modulates to change the center resonant frequency of described surface acoustic wave to described surface acoustic wave according to an extruding action.In the preferred embodiment, described method further comprises: before converting the surface acoustic wave after the described processing to second electromagnetic wave, by a reverberator to the reflection of encoding of described surface acoustic wave; Wherein, described by a reverberator to described surface acoustic wave encode the reflection step further comprise: the one group of reflection bar of arranging according to certain rules by described reverberator reflects described surface acoustic wave successively, generates the spike train corresponding with arranging of described one group of reflection bar.In another preferred embodiment, described method is according to the acoustic energy of touch action decay by the surface acoustic wave at place, contact.
In order to solve above second technical matters, the present invention also provides a kind of passive remote control thereof, and described method comprises: launch the first electromagnetic wave; The second electromagnetic wave that receive delay is reflected back; The second electromagnetic wave that returns according to described delayed reflex identifies remote control actions and generates corresponding guidance command based on the described remote control actions that identifies.In the preferred embodiment, described method identifies an extruding action according to the skew of described the second electromagnetic center resonant frequency, and generates described extruding and move corresponding guidance command.In another preferred embodiment, described method identifies an extruding action according to the skew of described the second electromagnetic center resonant frequency, and extract the coded identification code of electromagnetic wave that skew occurs described center resonant frequency, generate corresponding guidance command according to described identification code.In the preferred embodiment, described method is determined corresponding contact position and is generated the guidance command corresponding with described contact position according to the pulse that is attenuated in described the second electromagnetic wave or disappear again.Perhaps, described method becomes an identification code with the pulse that is attenuated in described the second electromagnetic wave or disappear with other pulse code, generates the guidance command corresponding with described identification code.
Telechiric device of the present invention utilizes the characteristic of the sound-electric transducing of surface acoustic wave sensor to realize passive remote control, has substituted the telechiric device that needs to use battery.Because surface acoustic wave sensor to the susceptibility of pressure, by the different remote control actions of identification user to telechiric device, just can determine various guidance command.Thereby this telechiric device need not to configure complicated button and auxiliary circuit, even one key just can finish a plurality of straighforward operations, so that the sufficient miniaturization of telechiric device and simplification, can staff one, carry, and passive decipherment distance can far reach 20 meters, is not subject to the impacts such as human body, metal object.Because simple in structure, the manufacturing cost of this telechiric device is lower, suitable for mass production.In addition, combine by pressure sensing characteristic and radio-frequency (RF) identification characteristic with surface acoustic wave sensor, the present invention has realized that also structure relatively simply but still can realize the passive remote control unit of the complicated distant control function of existing telepilot.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the schematic diagram according to the passive telechirics of the embodiment of the invention;
Fig. 2 is the logic diagram according to the passive remote control unit of one embodiment of the invention;
Fig. 3 is the principle of work schematic diagram according to the passive remote control unit of one embodiment of the invention;
Fig. 4 is the structural representation according to the passive remote control unit of one embodiment of the invention;
Fig. 5 is the logic diagram of the remote control recognition device that comprises of controlled plant shown in Figure 1;
Fig. 6 is the process flow diagram according to the passive remote control thereof of one embodiment of the invention;
Fig. 7 is the operational flowchart according to the remote control recognition device of one embodiment of the invention;
Fig. 8 is the schematic diagram of the second embodiment of passive remote control unit of the present invention;
Fig. 9 is the structural representation according to the passive remote control unit of second embodiment of the invention;
Figure 10 is the process flow diagram according to the passive remote control thereof of second embodiment of the invention;
Figure 11 is the operational flowchart according to the remote control recognition device of second embodiment of the invention;
Figure 12 a is the inner structure schematic diagram of the 3rd embodiment of passive remote control unit of the present invention;
Figure 12 b is the external structure schematic diagram of the 3rd embodiment of passive remote control unit of the present invention;
Figure 13 a is the schematic diagram according to the passive remote control unit reflected sound surface wave of third embodiment of the invention, a plurality of pulses when wherein showing the no touch action;
Figure 13 b is the schematic diagram according to the passive remote control unit reflected sound surface wave of third embodiment of the invention, a plurality of pulses when wherein showing touch action;
Figure 14 is the process flow diagram according to the passive remote control thereof of third embodiment of the invention;
Figure 15 is the operational flowchart according to the remote control recognition device of third embodiment of the invention;
Figure 16 is the operational flowchart according to the remote control recognition device of fourth embodiment of the invention.
Embodiment
Be the schematic diagram according to the passive telechirics 100 of one embodiment of the invention as shown in Figure 1, wherein controlled plant 100 can be controlled by passive remote control unit 120.This controlled plant 100 can comprise various digital household appliances, such as but not limited to televisor, video recorder, multimedia player etc.This controlled plant 100 is provided with remote control recognition device 112, in order to the remote signal of identifying passive remote control unit 120 and the guidance command that generates inside.
The logic diagram according to the passive remote control unit 120 of one embodiment of the invention as shown in Figure 2.The surface acoustic wave sensor 220 that passive remote control unit 120 comprises antenna 210 and couples with it.In conjunction with shown in Figure 1, the electromagnetic wave that antenna 210 sends in order to receive the remote control recognition device, 220 pairs of these electromagnetic waves of surface acoustic wave sensor are processed, and another electromagnetic wave that will generate by antenna 210 is again launched.
Fig. 3 shows the example that surface acoustic wave sensor is processed electromagnetic wave.After antenna 310 receives electromagnetic wave, through interdigital transducer (interdigital transducer, IDT) 321 this electromagnetic wave is changed into surface acoustic wave.This surface acoustic wave reflects through the reverberator (having comprised identification code) 323 of having programmed in the process of communication space 322 propagation on piezoelectric substrate surface, change into electromagnetic wave through interdigital transducer 321 again, launch through antenna 310, finish the delayed reflex process.In this electromagnetic delayed reflex process, if the user pushes surface acoustic wave sensor, the piezoelectric membrane of surface acoustic wave sensor will produce deformation, so that the velocity of propagation of surface acoustic wave changes, thereby the center resonant frequency of surface acoustic wave is offset, and then changes electromagnetic frequency characteristic.The electromagnetic frequency characteristic of launching by identifying this passive remote control unit just can be declared and know time and the number of times that whether pushes action and extruding action, thereby obtain different guidance commands.About the embodiment of the definition of extruding action and guidance command will provide follow-up.
The structural representation according to the passive remote control unit 400 of the present invention's one specific embodiment as shown in Figure 4.Figure 4 shows that the miniature passive telechiric device 400 of ring form, comprise coil antenna 410, interdigital transducer 421, stress deformation body 422 and reverberator 423.This stress deformation body 422 puts on the acoustic surface wave propagation space so that surface acoustic wave is modulated in order to will push action.Reverberator 423 can comprise that the coding surface acoustic wave that described a plurality of reflection bars are reflected back converts the electromagnetic wave that contains coded message to through interdigital transducer with tactic a plurality of reflection bar according to certain rules, and by coil antenna 410 emissions.Therefore, can have unique identification code according to the passive remote control unit of the embodiment of the invention, clash in the identifying in the time of can preventing that a plurality of telepilots together.
The logic diagram of the remote control recognition device 112 that the controlled plant among the Fig. 1 of being shown in Figure 5 comprises.This remote control recognition device comprises antenna 510, transmitting/receiving switch 520, local oscillation circuit 530, signal emission module 540, signal receiving module 550, signal processing module 560.Local oscillation circuit 530 produces the inquiry electromagnetic wave in the intermittent scanning mode, converts high frequency (for example 915MHz centre frequency) electromagnetic wave to through signal emission module 540, launches via antenna 510.After remote control recognition device 112 sends the inquiry electromagnetic wave, because the inquiry electromagnetic wave propagate, process in the surface acoustic wave sensor and return course in all need the time and have delay, so carry out electromagnetic wave emission and the conversion that receives by transmitting/receiving switch 520.After remote control recognition device 112 receives the electromagnetic wave that passive remote control unit (for example Fig. 2 or passive remote control unit shown in Figure 4) returns via antenna 510,550 pairs of these electromagnetic waves of signal receiving module carry out frequency down-converts and A/D conversion, and the data analysis that obtains after 560 pairs of A/D conversions of signal processing module is processed.For example, signal processing module 560 can identify the electromagnetic wave that returns whether because of the be squeezed skew of generative center resonance frequency of surface acoustic wave sensor.Accordingly, remote control recognition device 112 can identify the extruding action that occurs on the passive remote control unit, and then declares and know corresponding guidance command.For example, signal processing module 560 can identify the pulse that whether being attenuated is arranged or disappear in the electromagnetic wave that returns, and then declares and know corresponding guidance command.Again for example, signal processing module 560 can identify the coded message that comprises in the electromagnetic wave that returns, and then declares and know corresponding guidance command.The electromagnetic analyzing and processing of relevant remote control recognition device to being reflected back will provide more detailed introduction in subsequent descriptions.
Shown in Figure 6 is process flow diagram according to the passive remote control thereof 600 that is used for passive remote control unit of one embodiment of the invention.The method 600 is applicable to ring-shaped passive remote control unit 400 shown in Figure 4.The method 600 is begun by step 602.In step 604, the antenna 410 of passive remote control unit 400 receives electromagnetic wave.In step 606, interdigital transducer 421 converts the electromagnetic wave that receives to surface acoustic wave.In step 608, in the acoustic surface wave propagation process, the user will push action by stress deformation body 422 and put on the acoustic surface wave propagation space, change the frequency characteristic of the surface acoustic wave in propagating.In step 610, the surface acoustic wave after interdigital transducer 421 changes frequency characteristic converts the second electromagnetic wave to.In step 612, antenna 410 these second electromagnetic waves of emission.Then, the method finishes in step 614.
The process flow diagram according to the remote control thereof 700 of the remote control recognition device of one embodiment of the invention as shown in Figure 7.The straighforward operation that this remote control thereof 700 cooperates passive remote control unit shown in Figure 4 400 to carry out applicable to remote control recognition device shown in Figure 5 112.The method 700 is begun by step 702.In step 704, remote control recognition device 112 is launched the inquiry electromagnetic wave off and on by antenna 510.For example, remote control recognition device 112 can be launched this electromagnetic wave based on the controlled plant electrifying startup.In step 706, remote control recognition device 112 receives the electromagnetic wave that is returned by the passive remote control unit delayed reflex by antenna 510.In step 708,550 pairs of electromagnetic waves that receive of signal receiving module carry out frequency down-converts and A/D conversion, and the data analysis that signal processing module 560 obtains after A/D is changed is processed, and obtains electromagnetic center resonant frequency offset information.In step 710, signal processing module 560 has judged whether that according to this center resonant frequency offset information the extruding action occurs.If not, return step 704 and continue emission inquiry electromagnetic wave; If there is the extruding action to occur, continue execution in step 712, identify time and the number of times of extruding action.Then in step 714, signal processing module 560 is processed corresponding remote control actions based on the extruding actuation time and the number of times that identify according to predefined remote control parameter.
In one embodiment of the present of invention, controlled device can pre-defined following remote control parameter:
1) crushing failure at high speed once operates corresponding to upwards changing platform (channel up); Repeat the time of this extruding action and intermittently wanted at least the interval 1 second.
2) quick continuously extruded twice (within 500 milliseconds of times) are corresponding to changing platform (channeldown) operation downwards; Repeat the time of this extruding action and intermittently wanted at least the interval 1 second.
3) continue extruding 2 seconds, enter the volume adjusting mode of operation, controlled plant will access the volume bar.During the volume adjusting mode of operation:
A) crushing failure at high speed once strengthens operation corresponding to volume; Repeat the time of this extruding action and intermittently wanted at least the interval 1 second.
B) quick continuously extruded twice (within 500 milliseconds of times), reduce operation corresponding to volume; Repeat the time of this extruding action and intermittently wanted at least the interval 1 second.
C) not extruding is moved to surpass 10 seconds, automatically withdraws from the volume adjusting mode of operation.
4) continue extruding 10 seconds, corresponding to the electric power on/off machine operation.
5) if the remote control recognition device does not detect the existence of passive remote control unit, namely do not receive the electromagnetic wave that is reflected back, think that then the user leaves, surpass 10 minutes, with automatic shutdown.
6) if the remote control recognition device surpasses 1 hour does not detect the extruding action, controlled plant will provide the automatic shutdown prompting, owe without any action the controlled plant automatic shutdown such as 10 seconds.
The schematic diagram of the passive remote control unit 800 of second embodiment of the invention as shown in Figure 8.This passive remote control unit 800 has and the similar operation and control interface of traditional remote controller, and the distant control function suitable with traditional remote controller is provided, but has relatively simple circuit structure and need not battery.As shown in Figure 8, this passive remote control unit 800 has a plurality of squeeze buttons, comprises power switch button 810, changes platform button 820, tuning amount button 830 and channel selection button 840.
The inside implementation structure schematic diagram of passive remote control unit 800 shown in Figure 8 as shown in Figure 9.Corresponding to a plurality of buttons among Fig. 8, passive remote control unit 800 is provided with the array of a plurality of surface acoustic wave sensors (for example surface acoustic wave sensor 920,930,940,950) that couple with antenna 910, and each surface acoustic wave sensor wherein is associated with a squeeze buttons on the passive remote control unit operation and control interface.And each surface acoustic wave sensor has the unique identifier by the reverberator coding.For example, the reverberator 922 of surface acoustic wave sensor 920 comprises four spaced reflection bars, is encoded into identification code " 110101 ", corresponding to channel selection button " 1 "; The reverberator 932 of surface acoustic wave sensor 930 comprises four spaced reflection bars, is encoded into identification code " 111001 ", corresponding to channel selection button " 3 "; The reverberator 942 of surface acoustic wave sensor 940 comprises four spaced reflection bars, is encoded into identification code " 100111 ", reduces button corresponding to volume; The reverberator 9252 of surface acoustic wave sensor 950 comprises four spaced reflection bars, is encoded into identification code " 110011 ", corresponding to changing the platform button downwards.Therefore, to the extruding of a certain button on this passive remote control unit 800 action can be by this button association the identification code of surface acoustic wave sensor identify.
The process flow diagram according to the passive remote control thereof 1000 of second embodiment of the invention as shown in figure 10.The method 1000 is applicable to Fig. 8 and passive remote control unit shown in Figure 9.The method 1000 is begun by step 1002.In step 1004, receive electromagnetic wave by antenna 910; In step 1006, each surface acoustic wave sensor in a plurality of surface acoustic wave sensors that couple with antenna 910 converts respectively the electromagnetic wave that receives to surface acoustic wave, the reverberator of this each surface acoustic wave sensor by separately is to the reflective condition of the surface acoustic wave corresponding unique identifier of encoding out, for example, the surface acoustic wave sensor 920 that is associated with channel selection button " 1 " is by its reverberator 922 reflected sound surface waves, to surface acoustic wave coding " 110101 ".Whether in step 1008, confirming has any button to be extruded on the passive remote control unit 800.If in the step 1010, a surface acoustic wave sensor that is associated with the button that is extruded carries out modulation treatment according to this extruding action to surface acoustic wave, then continues execution in step 1012.For example, if the user pushes channel selection button " 1 ", the surface acoustic wave sensor 920 that is associated with this button will push the surface acoustic wave that action is applied thereto propagation, change the center resonant frequency of this surface acoustic wave.If in step 1008 on the passive remote control unit 800 without any extruding action, show that the user does not carry out any straighforward operation.Then, in the step 1012, the surface acoustic wave that is reflected back through the reverberator of each surface acoustic wave sensor is converted respectively to corresponding the second electromagnetic wave again in each surface acoustic wave sensor.In step 1014, by a plurality of second electromagnetic waves of these a plurality of surface acoustic wave sensors generations of antenna 910 emissions.Then, the method 1000 finishes in step 1016.By passive remote control unit shown in Figure 9 and remote control thereof shown in Figure 10, the passive remote controller that the present invention can implementation structure oversimplifies.
The process flow diagram according to the remote control thereof 1100 of the remote control recognition device of second embodiment of the invention as shown in figure 11.The straighforward operation that this remote control thereof 1100 cooperates Fig. 8 and passive remote control unit 800 shown in Figure 9 to carry out applicable to remote control recognition device shown in Figure 5.The method 1100 is begun by step 1102.In step 1104, the local oscillation circuit 530 of remote control recognition device 112 sends the inquiry electromagnetic wave in the mode of intermittent scanning, is processed into frequency electromagnetic waves by signal emission module 540 and sends by antenna 510.In step 1106, remote control recognition device 112 receives a plurality of electromagnetic waves that returned by passive remote control unit 800 delayed reflexs by antenna 510.In step 1108, signal processing module 560 is processed a plurality of electromagnetic waves that receive, and analyzes each electromagnetic center resonant frequency offset information in these a plurality of electromagnetic waves.In step 1110, signal processing module 560 has judged whether to occur any extruding action according to electromagnetic center resonant frequency offset information.If described a plurality of electromagnetic center resonant frequency all is not offset, show without any the extruding action to occur, namely the user does not carry out any straighforward operation, and method 1100 is returned step 1104 and is continued scanning.If according to certain electromagnetic center resonant frequency in described a plurality of electromagnetic waves skew occuring in the step 1110 declares and knows the extruding action has occured, then in step 1112, signal processing module 560 extracts and is judged to know this electromagnetic coded message that extruding action (being that skew has occured center resonant frequency) has occured.For example, if the channel selection button " 1 " on the passive remote control unit 800 is pushed by the user, the electromagnetic wave that related surface acoustic wave sensor 920 is reflected back is detected the extruding action occurs, and therefrom extracts corresponding identification code " 110101 ".Then in step 1114, signal processing module 560 is processed corresponding remote control actions according to predefined identification code.For example, pre-defined identification code " 110101 " is corresponding to channel selection button " 1 ", and then signal processing module 560 will generate the guidance command of selecting the 1st channel according to the identification code that extracts " 110101 " from electromagnetic wave.
It is the schematic diagram of the passive remote control unit 1200 of third embodiment of the invention shown in Figure 12 a and Figure 12 b.This passive remote control unit 1200 provides the remote control scheme of a kind of distant control function between passive remote control unit shown in Figure 4 400 and Fig. 8, passive remote control unit 800 shown in Figure 9, but has with the passive remote control unit 400 same simple structures shown in 4 and need not battery.Shown in Figure 12 a, this passive remote control unit 1200 comprises substrate 1230 and is arranged on antenna 1210, interdigital transducer 1220 and reverberator 1240 in the substrate 1230, and antenna 1210 couples with interdigital transducer 1220.Substrate 1230 is preferably the glass substrate with better sound wave transport properties.Antenna 1210 is used for receiving and emitting electromagnetic wave.The electromagnetic wave that interdigital transducer 1220 receives antenna 1210 converts surface acoustic wave to and propagates along substrate 1230.Reverberator 1240 comprises that along the acoustic surface wave propagation direction by one group of reflection bar dredging the solid matter row, for example reflection bar 1241, for successively surface acoustic wave being reflected.Obviously, among other embodiment of the present invention, this group of reflection bar can be arranged by other rules, for example is listed as to white-out by close.This group of reflection bar can by the known method of prior art for example etching method be formed in the substrate 1230.After the surface acoustic wave of reverberator 1240 reflections is received by interdigital transducer 1220, change and change into another electromagnetic wave, launch by antenna 1210.
In addition, shown in Figure 12 b, passive remote control unit 1200 also can arrange on substrate 1230 surfaces one group of contact 1250, and each contact wherein can corresponding guidance command, and for example contact 1251 can be corresponding to upwards changing the platform order.During passive remote control unit 1200 work, not have to touch under the situation that stops (being that the user does not carry out any straighforward operation), the reflection bar of reverberator 1240 can be according to its reflection interval of arranging successively by growing the spike train that shortens, shown in Figure 13 a.When the user with on the finger touch substrate 1230 during a certain contact, when for example contact 1251 is touched, finger is with the acoustic energy that partly even fully absorbs by the surface acoustic wave of contact 1251, the pulse of reflection is attenuated or complete obiteration after the contact 1251 that is touched in the spike train that causes interdigital transducer 1220 to receive, shown in Figure 13 b.Comprised this change through interdigital transducer 1220 conversions and by the electromagnetic wave that antenna 1210 is launched.Therefore, remote control recognition device in the controlled plant (for example remote control recognition device 112 shown in Figure 5) can detect this change, determine the contact and be touched, and can determine according to the pulse that is attenuated or disappears that detects the position of the contact that is touched.The pre-defined corresponding guidance command of a plurality of contact positions on the passive remote control unit 1200 in the remote control recognition device, for example, pre-defined contact 1251 is corresponding to upwards changing the platform order.Therefore, the remote control recognition device can generate the guidance command corresponding with this contact according to the position of the contact that is touched of determining.Or, in another embodiment of the present invention, remote control recognition device in the controlled plant is encoded train of impulses and other train of impulses of being attenuated in the reflection electromagnetic wave that receives or disappearing respectively, the train of impulses that for example will be attenuated or disappear is encoded to " 0 ", other train of impulses is encoded to " 1 ", then the remote control recognition device can be determined the identification code of guidance command corresponding to the contact that is touched, and generates the guidance command corresponding with this identification code according to definition in advance.
The process flow diagram according to the passive remote control thereof 1400 of third embodiment of the invention as shown in figure 14.The method 1400 is applicable to the passive remote control unit 1200 shown in Figure 12 a and Figure 12 b.The method 1400 is begun by step 1402.In step 1404, receive electromagnetic wave by antenna 1210; In step 1406, the interdigital transducer 1220 that couples with antenna 1210 converts the electromagnetic wave that receives to surface acoustic wave along substrate 1230 propagation.In step 1408, confirm whether the user touches any contact on the passive remote control unit 1400.If in the step 1410, the acoustic energy of the surface acoustic wave by this contact is by user's finger part or absorb fully, then continues execution in step 1412.For example, if the user with finger touch contact 1251, the acoustic energy by these 1251 places, contact is by finger part or absorb fully.If the user does not touch passive remote control unit 1200 in step 1408, show that the user does not carry out any straighforward operation.In step 1412, one group of reflection bar of reverberator 1240 is the reflected sound surface wave successively, produces the time interval corresponding with arranging of this group reflection bar by the long spike train that shortens.Wherein, the pulse corresponding to reflection after the contact 1251 that is touched is partly decayed or complete obiteration.Then, in the step 1414, again converted to the second electromagnetic wave of correspondence by interdigital transducer 1220 through the surface acoustic wave of aforementioned reflection.In step 1416, by antenna 1410 these second electromagnetic waves of emission.Then, the method 1400 finishes in step 1418.By passive remote control unit shown in Figure 12 and remote control thereof shown in Figure 14, the present invention can realize a kind of touch remote controller.
The process flow diagram according to the remote control thereof 1500 of the remote control recognition device of third embodiment of the invention as shown in figure 15.The straighforward operation that this remote control thereof 1500 cooperates the passive remote control unit 1200 shown in Figure 12 a and Figure 12 b to carry out applicable to remote control recognition device shown in Figure 5 112.The method 1500 is begun by step 1502.In step 1504, remote control recognition device 112 is launched the inquiry electromagnetic wave off and on by antenna 510.In step 1506, remote control recognition device 112 receives the electromagnetic wave that is returned by passive remote control unit 1200 delayed reflexs by antenna 510.In step 1508,550 pairs of electromagnetic waves that receive of signal receiving module carry out frequency down-converts and A/D conversion, and the data analysis that signal processing module 560 obtains after A/D is changed is processed.In step 1510, whether signal processing module 560 foundations have pulse to be attenuated or disappear to have judged whether that the contact is touched.If not, return step 1504, remote control recognition device 112 continues emission inquiry electromagnetic wave; Be attenuated or disappear if detected pulse, continue execution in step 1512, determine the position of corresponding contact according to the pulse that is attenuated or disappears that detects.Then in step 1514, signal processing module 560 generates corresponding guidance command according to predefined positional information, processes remote control actions.
The process flow diagram according to the remote control thereof 1600 of the remote control recognition device of fourth embodiment of the invention as shown in figure 16.The straighforward operation that this remote control thereof 1600 cooperates the passive remote control unit 1200 shown in Figure 12 a and Figure 12 b to carry out applicable to remote control recognition device shown in Figure 5 112.The method 1600 is similar to method 1500 shown in Figure 15.Method 1600 is by step 1602 beginning, and in step 1604, remote control recognition device 112 is launched the inquiry electromagnetic wave off and on by antenna 510.In step 1606, remote control recognition device 112 receives the electromagnetic wave that is returned by passive remote control unit 1200 delayed reflexs by antenna 510.In step 1608,550 pairs of electromagnetic waves that receive of signal receiving module carry out frequency down-converts and A/D conversion, and the data analysis that signal processing module 560 obtains after A/D is changed is processed.In step 1610, whether signal processing module 560 foundations have pulse to be attenuated or disappear to have judged whether that the contact is touched.If not, return step 1604, remote control recognition device 112 continues emission inquiry electromagnetic wave; If having detected pulse is attenuated or disappears, continue execution in step 1612, the pulse that is attenuated or disappears that signal processing module 560 will detect and other pulse are encoded respectively, the pulse code that for example will be attenuated or disappear is " 0 ", be " 1 " with other pulse code, thereby determine an identification code, this identification code namely is the identification code of the corresponding guidance command in contact that is touched.Then in step 1614, signal processing module 560 generates the guidance command corresponding with this identification code according to definition in advance, processes remote control actions.
Generally speaking, the present invention has disclosed a kind of telechirics, comprise controlled plant and passive remote control unit, wherein the remote control recognition device that comprises of controlled plant is with the mode emitting electromagnetic wave of gap scanning, passive remote control unit receives electromagnetic wave, utilize surface acoustic wave sensor to convert this electromagnetic wave to surface acoustic wave, converting electromagnetic wave to after according to user's remote control actions surface acoustic wave being processed launches again, electromagnetic wave after this conversion also codified has identification code, in order to distinguish the straighforward operation from different surface acoustic wave sensors.The remote control recognition device of controlled plant carries out the signal processing and identification and goes out remote control actions, and can extract identification code after receiving the electromagnetic wave that the passive remote control unit delayed reflex returns, and generates the guidance command control controlled plant that is associated.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1. a passive remote control unit is characterized in that, comprising:
One antenna is in order to receive one first electromagnetic wave and emission one second electromagnetic wave;
One surface acoustic wave sensor, be coupled to described antenna, convert surface acoustic wave in order to first electromagnetic wave that will receive, and time and the number of times of the extruding of foundation one remote control actions, convert described the second electromagnetic wave after described surface acoustic wave processed to via described antenna transmission, finish the delayed reflex process
Described remote control actions comprises the crushing failure at high speed of described surface wave sensor and continues extruding;
Described surface acoustic wave sensor comprises:
Put on the acoustic surface wave propagation space with a stress deformation body of the center resonant frequency of change surface acoustic wave in order to will push action;
The surface acoustic wave that will convert to after surface acoustic wave also will be processed in order to first electromagnetic wave that will receive converts second an electromagnetic interdigital transducer to;
To surface acoustic wave encode the reflection a reverberator, described surface acoustic wave reflects through the reverberator of having programmed in the process of the communication space propagation on the piezoelectric substrate surface of described stress deformation body, changes into described the second electromagnetic wave through described interdigital transducer again;
In this electromagnetic delayed reflex process, when surface acoustic wave sensor is squeezed, the piezoelectric membrane of described surface acoustic wave sensor produces deformation, so that the velocity of propagation of described surface acoustic wave changes, thereby the center resonant frequency of described surface acoustic wave is offset, and then changes electromagnetic frequency characteristic.
2. passive remote control unit according to claim 1 is characterized in that, described antenna is the coil antenna that is coupled on the described surface acoustic wave sensor.
3. passive remote control unit according to claim 1 is characterized in that, described surface acoustic wave sensor comprises:
One substrate, described interdigital transducer and described reverberator are located in the described substrate; Described reverberator comprises according to certain rules one group of reflection bar that order is arranged, in order to reflected sound surface wave successively.
4. remote control recognition device, be arranged at by in the equipment of remote control with a telechiric device cooperating with surface acoustic wave sensor, it is characterized in that, described remote control recognition device comprises:
One antenna is in order to launch the first electromagnetic wave and reception from the second electromagnetic wave of described telechiric device;
One signal processing module, in order to described the second electromagnetic wave is carried out frequency down-converts and A/D conversion, and the data analysis processing to obtaining after the A/D conversion, identify time and the number of times of remote control actions extruding according to described the second electromagnetic wave, and based on described guidance command corresponding to remote control actions generation that identifies
Described remote control actions comprises the crushing failure at high speed of described surface wave sensor and continues extruding; Described signal processing module identifies an extruding action according to the skew of described the second electromagnetic center resonant frequency, and generates described extruding and move corresponding guidance command;
Described signal processing module is determined corresponding contact position according to the pulse that is attenuated in described the second electromagnetic wave or disappear, and the generation guidance command corresponding with described contact position.
Perhaps, described signal processing module becomes an identification code with the pulse that is attenuated in described the second electromagnetic wave or disappear with other pulse code, generates the guidance command corresponding with described identification code.
5. a passive remote control unit is characterized in that, comprising:
One antenna is in order to receive the first electromagnetic wave and a plurality of the second electromagnetic waves of emission;
The array of a plurality of surface acoustic wave sensors, each surface acoustic wave sensor is coupled to described antenna, the first electromagnetic wave that each surface acoustic wave sensor in described a plurality of surface acoustic wave sensor will receive respectively converts surface acoustic wave to, and by each self-corresponding reverberator surface acoustic wave is encoded and to convert described a plurality of the second electromagnetic wave to via described antenna transmission after processing, finish the delayed reflex process;
Wherein, any one carries out modulation treatment to described surface acoustic wave and converts corresponding the second electromagnetic wave to according to time and the number of times of an extruding action in described a plurality of surface acoustic wave sensors,
Wherein, described extruding action comprises described surface acoustic wave sensor crushing failure at high speed and continues extruding;
Described surface acoustic wave sensor comprises:
Put on the acoustic surface wave propagation space with a stress deformation body of the center resonant frequency of change surface acoustic wave in order to will push action;
The surface acoustic wave that will convert to after surface acoustic wave also will be processed in order to first electromagnetic wave that will receive converts second an electromagnetic interdigital transducer to;
To the reverberator that surface acoustic wave is encoded and reflected, described surface acoustic wave reflects through the reverberator of having programmed in the process of the communication space propagation on piezoelectric substrate surface, changes into described the second electromagnetic wave through described interdigital transducer again;
In this electromagnetic delayed reflex process, when surface acoustic wave sensor is squeezed, the piezoelectric membrane of described surface acoustic wave sensor produces deformation, so that the velocity of propagation of described surface acoustic wave changes, thereby the center resonant frequency of described surface acoustic wave is offset, and then changes electromagnetic frequency characteristic.
6. remote control recognition device, be arranged at by in the equipment of remote control with a telechiric device cooperating with a plurality of surface acoustic wave sensors, it is characterized in that, described remote control recognition device comprises:
One antenna is in order to launch the first electromagnetic wave and reception from a plurality of second electromagnetic waves of described telechiric device;
One signal processing module, in order to described a plurality of the second electromagnetic waves are carried out frequency down-converts and A/D conversion, and the data analysis processing to obtaining after the A/D conversion, identify time and the number of times of extruding action according to described a plurality of the second electromagnetic waves, to extract an identification code, judge corresponding remote control actions according to described identification code
Wherein, described extruding action comprises crushing failure at high speed and continues extruding;
Skew occurs according to second electromagnetic center resonant frequency in described a plurality of the second electromagnetic waves and identifies described extruding action in described signal processing module;
Described signal processing module is determined corresponding contact position according to the pulse that is attenuated in described the second electromagnetic wave or disappear, and the generation guidance command corresponding with described contact position;
Perhaps, described signal processing module becomes an identification code with the pulse that is attenuated in described the second electromagnetic wave or disappear with other pulse code, generates the guidance command corresponding with described identification code.
7. a passive remote control thereof that is used for passive remote control unit is characterized in that, described method comprises:
Receive the first electromagnetic wave;
Convert described the first electromagnetic wave to surface acoustic wave by surface acoustic wave sensor, and according to time and number of times that a remote control actions is pushed, described surface acoustic wave is processed;
Convert the surface acoustic wave after the described processing to second electromagnetic wave;
Launch described the second electromagnetic wave, finish the delayed reflex process,
Wherein, described remote control actions comprises crushing failure at high speed and continues extruding;
The step that described foundation one remote control actions is processed described surface acoustic wave further comprises: the center resonant frequency of described surface acoustic wave being modulated to change described surface acoustic wave according to an extruding action;
Described surface acoustic wave reflects through the reverberator of having programmed in the process of the communication space propagation on piezoelectric substrate surface, changes into described the second electromagnetic wave again;
In this electromagnetic delayed reflex process, when surface acoustic wave sensor is squeezed, the piezoelectric membrane of described surface acoustic wave sensor produces deformation, so that the velocity of propagation of described surface acoustic wave changes, thereby the center resonant frequency of described surface acoustic wave is offset, and then changes electromagnetic frequency characteristic.
8. method according to claim 7 is characterized in that, described method further comprises: before converting the surface acoustic wave after the described processing to second electromagnetic wave, by a reverberator to the reflection of encoding of described surface acoustic wave.
9. method according to claim 7 is characterized in that, the step that described foundation one remote control actions is processed described surface acoustic wave further comprises: according to the acoustic energy of touch action decay by the surface acoustic wave at place, contact.
10. a passive remote control thereof is characterized in that, described method comprises:
Launch the first electromagnetic wave;
The second electromagnetic wave that receive delay is reflected back;
The second electromagnetic wave that returns according to described delayed reflex identifies time and the number of times of remote control actions extruding, and generates the guidance command of correspondence based on the described remote control actions that identifies,
Wherein, described remote control actions comprises crushing failure at high speed and continues extruding;
The step that described foundation the second electromagnetic wave identifies remote control actions further comprises: identify an extruding action according to the skew of described the second electromagnetic center resonant frequency, and generate described extruding and move corresponding guidance command;
Described surface acoustic wave reflects through the reverberator of having programmed in the process of the communication space propagation on piezoelectric substrate surface, changes into described the second electromagnetic wave again;
In this electromagnetic delayed reflex process, when surface acoustic wave sensor is squeezed, the piezoelectric membrane of described surface acoustic wave sensor produces deformation, so that the velocity of propagation of described surface acoustic wave changes, thereby the center resonant frequency of described surface acoustic wave is offset, and then changes electromagnetic frequency characteristic.
11. method according to claim 10 is characterized in that, the step that described foundation the second electromagnetic wave identifies remote control actions further comprises:
Skew according to described the second electromagnetic center resonant frequency identifies an extruding action;
Extract the coded identification code of the second electromagnetic wave that skew has occured described center resonant frequency;
Generate corresponding guidance command according to described identification code.
12. method according to claim 10, it is characterized in that, the step that described foundation the second electromagnetic wave identifies remote control actions further comprises: determine corresponding contact position according to the pulse that is attenuated in described the second electromagnetic wave or disappear, and the generation guidance command corresponding with described contact position.
13. method according to claim 10, it is characterized in that, the step that described foundation the second electromagnetic wave identifies remote control actions further comprises: the pulse that is attenuated in described the second electromagnetic wave or disappear is become an identification code with other pulse code, generate the guidance command corresponding with described identification code.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102175358A (en) * | 2010-12-06 | 2011-09-07 | 北京理工大学 | Passive wireless surface acoustic wave stress sensor adopting three-layer stress transferring model |
| CN102403981B (en) * | 2011-11-09 | 2014-07-23 | 武汉烽火富华电气有限责任公司 | Resonance type surface acoustic wave passive wireless array sensing system and method thereof |
| CN106571019A (en) * | 2015-10-30 | 2017-04-19 | 深圳市瑞迪飞科技有限公司 | Passive short-distance control device, method, system and electronic key |
| CN206946704U (en) * | 2017-07-28 | 2018-01-30 | 深圳Tcl新技术有限公司 | Remote control |
| CN111483896A (en) * | 2020-04-02 | 2020-08-04 | 浙江工业大学 | Non-contact elevator key pressing method based on ultrasonic box |
| CN114486008B (en) * | 2022-01-26 | 2023-08-04 | 中国电子科技集团公司第七研究所 | Flexible microstrip line, back scattering touch perception system and measuring method thereof |
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