CN102446404A - Short-range wireless signal extension device receiver and transmitter, and method thereof - Google Patents
Short-range wireless signal extension device receiver and transmitter, and method thereof Download PDFInfo
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- CN102446404A CN102446404A CN2010105129970A CN201010512997A CN102446404A CN 102446404 A CN102446404 A CN 102446404A CN 2010105129970 A CN2010105129970 A CN 2010105129970A CN 201010512997 A CN201010512997 A CN 201010512997A CN 102446404 A CN102446404 A CN 102446404A
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Abstract
The invention provides a short-range wireless signal extension device receiver and transmitter and a method thereof, which are used for extending the transmission range of a short-range wireless signal remote controller. The method comprises the following steps: receiving a short-range wireless signal; carrying out n-times sampling on the short-range wireless signal to generate a short-range wireless sampled signal, wherein n is a real number greater than or equal to 2; and transmitting the short-range wireless sampled signal in a wireless transmission or wired transmission mode.
Description
Technical field
The present invention relates to a kind of short range radio signals telepilot, relate in particular to a kind of short range radio signals extension apparatus and method thereof in order to the transmission range of extending the short range radio signals telepilot.
Background technology
Domestic electric appliances more and more many in the at present general family all use infrared remote controller to control domestic electric appliance, and especially each device of home audio-visual devices all has its specific telepilot to control.Generally speaking, the coverage of infrared remote controller is not far usually, approximately all in 10 meters.In addition, the emission angle of the infrared signal of infrared remote controller also only has between 30～45 degree.Therefore, if the distance of in check domestic electric appliance and infrared remote controller is too far away, perhaps exceed its emission angle, then infrared remote controller can't successfully be controlled domestic electric appliance.
Please with reference to Fig. 1, Fig. 1 is apart from synoptic diagram too far away between infrared remote controller and the in check optical disc player.In Fig. 1, infra-red remote control system 1 comprises infrared remote controller 13, optical disc player 12 and TV 11, and wherein TV 11 uses the video-audio transmission line to link each other with optical disc player 12.Infrared remote controller 13 and the distance between the optical disc player 12 of Fig. 1 are too far away, and can't successfully use infrared remote controller 13 to control optical disc player 12.
Please with reference to Fig. 2, Fig. 2 is to use infrared ray extension apparatus (IR Blaster) to extend the synoptic diagram of infrared remote controller transmission range.Among Fig. 2, infra-red remote control system 2 comprises infrared ray extension apparatus 24, infrared remote controller 23, optical disc player 22 and TV 21, and wherein TV 21 uses the video-audio transmission line to link each other with optical disc player 22.The infrared signal that infrared ray extension apparatus 24 meeting receiving infrared-ray telepilots 23 are sent; And pass on infrared signal to optical disc player 22; With the transmission range of extension infrared remote controller 23, and solve further between infrared remote controller 23 and the optical disc player 22 apart from problem too far away.
Please with reference to Fig. 3, Fig. 3 is the synoptic diagram that in check optical disc player exceeds the emission angle of infrared remote controller.In Fig. 3, infra-red remote control system 3 comprises infrared remote controller 33, optical disc player 32 and TV 31, and wherein TV 31 uses the video-audio transmission line to link each other with optical disc player 32.The optical disc player 32 of Fig. 3 exceeds the emission angle of infrared remote controller 33, and can't successfully use infrared remote controller 33 to control optical disc player 32.
Please with reference to Fig. 4, Fig. 4 is to use the infrared ray extension apparatus to expand the synoptic diagram of the emission angle of infrared remote controller.Among Fig. 4; Infra-red remote control system 4 comprises infrared ray extension apparatus transmitter 45, infrared ray extension apparatus receiver 44, infrared remote controller 43, optical disc player 42 and TV 41, and wherein TV 41 uses the video-audio transmission line to link each other with optical disc player 42.The infrared signal that infrared ray extension apparatus receiver 44 meeting receiving infrared-ray telepilots 43 are sent; And infrared signal decoded and demodulation; With acquisition control information, and will control information and give infrared ray extension apparatus transmitter 45 with the radio signal propagation technology.Infrared ray extension apparatus transmitter 45 receives and has the wireless signal of controlling information, and wireless signal being decoded with demodulation and with after obtaining the control information, the control information is carried out modulation and encryption, gives optical disc player 42 to produce infrared signal.Through the assistance of infrared ray extension apparatus transmitter 45 with infrared ray extension apparatus receiver 44, the emission angle of infrared remote controller 43 can be expanded, and solves the problem that optical disc player 42 exceeds the emission angle of infrared remote controller 43 further.
To be placed on distance far away when household electrical appliance equipment, or barrier (like wall or decoration) is arranged and have influence on when receiving, and then infrared ray extension apparatus radio signal propagation technology capable of using infrared signal that infrared remote controller is launched is sent to farther place.Yet present infrared facility need or only be supported specific infra-red code through prior learning infrared ray control sign indicating number, just can successfully pass on infrared signal.In other words, traditional infrared ray extension apparatus must be decoded to infrared signal, and must the wireless excessively mode of decoded control Zixuntong be delivered to the other end, being used for extending the transmission range of infra-red signal, and the control domestic electric appliance.
Traditional infrared ray extension apparatus is if only support specific infrared ray control sign indicating number, and then its group/cording quantity that can support is limited, and may invade the patent of particular vendor, and the legal issue of deriving.
Traditional infrared ray extension apparatus then need use a specific infrared remote controller to learn if need prior learning infrared ray control sign indicating number.So will change the custom that the user uses infrared remote controller, and bring inconvenience.In addition, extra infrared remote controller causes obscuring of user easily, and domestic electric appliance of every use all wants the user to use this extra infrared remote controller to come to switch earlier, also can let the user at a loss as to what to do.
Summary of the invention
The embodiment of the invention provides a kind of short range radio signals extension method, and in order to extend the transmission range of short range radio signals telepilot, it comprises: receive short range radio signals; Short range radio signals is carried out n doubly take a sample, to produce the short-distance radio sampled signal, wherein n is more than or equal to 2; And the short-distance radio sampled signal sent out with wireless transmission method or wire transmission mode.
The embodiment of the invention provides a kind of short range radio signals extension method; In order to extend the transmission range of short range radio signals telepilot; It comprises: receive wire signal through wired passage; Perhaps receive wireless signal, and in wired signal or wireless signal, obtain short-distance radio sampled signal together with carrier wave through radio channel; Short-distance radio sampled signal to together with carrier wave reduces, to obtain the short-distance radio recovering signal; And give controlled domestic electric appliance with the short range wireless transmission mode to the short-distance radio recovering signal.
The embodiment of the invention provides a kind of short range radio signals extension apparatus receiver, in order to extend the transmission range of short range radio signals telepilot.Short range radio signals extension apparatus receiver comprises short range radio signals receiving element, sample of signal unit and signal transmitter unit.The short range radio signals receiving element receives short range radio signals, short range radio signals is not decoded and demodulation, and directly short range radio signals is offered the sample of signal unit.The sample of signal unit carries out n to short range radio signals doubly takes a sample, and to produce the short-distance radio sampled signal, wherein n is more than or equal to 2.The signal transmitter unit sends out the short-distance radio sampled signal with wireless transmission method or wire transmission mode.
The embodiment of the invention provides a kind of short range radio signals extension apparatus transmitter, in order to extend the transmission range of short range radio signals telepilot.Short range radio signals extension apparatus transmitter comprises signal receiving unit, signal reduction unit and short range radio signals transmitter unit.Signal receiving unit receives wire signal through wired passage, perhaps receives wireless signal through radio channel, and in wired signal or wireless signal, obtains the short-distance radio sampled signal.The signal reduction unit reduces to the short-distance radio sampled signal, to obtain the short-distance radio recovering signal.The short range radio signals transmitter unit is not decoded and demodulation to the short-distance radio recovering signal, and directly gives controlled domestic electric appliance with the short range wireless transmission mode with the short-distance radio recovering signal.
Based on above-mentioned, short range radio signals extension apparatus that the embodiment of the invention provided and method thereof can be extended the transmission range (comprising the increase of transmission range and the expansion of emission angle) of short range radio signals telepilot.This short range radio signals extension apparatus and method thereof do not need extra short range radio signals telepilot to learn and operate; And can under the custom that does not change the user, let the user utilize original short range radio signals telepilot to control domestic electric appliance.In addition, this short range radio signals extension apparatus and method thereof need not be decoded and demodulation to the short range radio signals that receives, and therefore can not offend other dealers' short range radio signals encoding and decoding patent.
For letting the above-mentioned feature and advantage of the present invention can be more obviously understandable, hereinafter is special lifts embodiment, and cooperates appended graphic elaborating as follows.
Description of drawings
Fig. 1 is apart from synoptic diagram too far away between infrared remote controller and the in check optical disc player.
Fig. 2 is to use infrared ray extension apparatus (IR Blaster) to extend the synoptic diagram of infrared remote controller transmission range.
Fig. 3 is the synoptic diagram that in check optical disc player exceeds the emission angle of infrared remote controller.
Fig. 4 is to use the infrared ray extension apparatus to expand the synoptic diagram of the emission angle of infrared remote controller.
Fig. 5 is to use the sample of signal synoptic diagram of the short range radio signals extension method of the embodiment of the invention.
Fig. 6 is the calcspar of the short range radio signals extension apparatus that provides of the embodiment of the invention.
Fig. 7 is the process flow diagram of the short range radio signals extension method that provides of the embodiment of the invention.
Fig. 8 is the process flow diagram of another short range radio signals extension method of providing of the embodiment of the invention.
Reference numeral:
1～4: the infra-red remote control system; 11,21,31,41: TV;
12,22,32,42: optical disc player; 13,23,33,43: infrared remote controller;
24: the infrared ray extension apparatus; 44: infrared ray extension apparatus receiver;
45: infrared ray extension apparatus transmitter; 61: short range radio signals extension apparatus receiver;
611: the short range radio signals receiving element; 62: short range radio signals extension apparatus transmitter;
612: the sample of signal unit; 613: the signal transmitter unit;
621: the short range radio signals transmitter unit; 622: the signal reduction unit;
623: signal receiving unit; 71～73,81～83: step.
Embodiment
The embodiment of the invention provides a kind of short range radio signals extension method, the transmission range that it uses the short range radio signals extension apparatus to extend the short range radio signals telepilot.Above-mentioned short range radio signals extension apparatus comprises receiver and transmitter, and wherein receiver is near the short range radio signals telepilot, and transmitter is then near domestic electric appliance.Near the short range radio signals extension apparatus receiver of short range radio signals telepilot with the short range radio signals that receives under situation without decoding and demodulation; Directly carry out n and take a sample doubly that (n is for more than or equal to 2 real number; Can be round values or non-integer numerical value; N can for example be 2.8 or 3), with the short range radio signals sampled signal of generation, and then use wireless transmission method (for example wireless radiofrequency transmission) together with carrier wave; Produce wireless signal, to give corresponding short range radio signals extension apparatus transmitter with the short-distance radio sampled signal by this.The n expression of doubly taking a sample, sampling frequency by short range radio signals the use carrier signal frequency range n doubly, and short range radio signals the frequency range frequency of its carrier wave (carrier wave of short range radio signals) no better than.In addition; If the frequency of carrier wave is not limited to CF; And use the receiver of short range radio signals extension method to support the reception of multiband, then the n with the maximum frequency of multiband doubly takes a sample to short range radio signals, to guarantee that short range radio signals is undistortedly by sampling and reduction.
Need to prove; Short range radio signals of the present invention is meant the wireless signal that power is lower and transmission range is short; And said short range radio signals even possibly be the wireless signal that emission angle limits to some extent for example is infrared signal, Bluetooth transmission signal, far infrared signal or near infrared ray signal etc.In addition, the said wireless signal that passes with wireless transmission method is meant the wireless signal that power is big than short range radio signals and transmission range is long than short range radio signals, and even possibly be the unconfined wireless signal of emission angle.
Short range radio signals extension apparatus transmitter near domestic electric appliance can receive this wireless signal; And in wireless signal, obtain the short-distance radio sampled signal; To obtain original short-distance radio recovering signal (if the mistake of not having transmission or handling, the short-distance radio recovering signal equals short range radio signals).Behind reduction short-distance radio sampled signal, can this short-distance radio recovering signal be used the short range wireless transmission mode near the short range radio signals extension apparatus transmitter of domestic electric appliance, directly transfer to controlled domestic electric appliance.
Be noted that in other application, also can use wire transmission mode (for example household power communication transmission) to come to replace respectively above-mentioned wireless transmission method and wireless signal with wire signal.In addition, wire signal can for example be power line communication transmission (home plug) signal, and wireless signal can for example be radiofrequency signal, wireless frequency hopping (frequency hopping) signal or the wireless signal with check code (check sum).
Please with reference to Fig. 5, Fig. 5 is to use the sample of signal synoptic diagram of the short range radio signals extension method of the embodiment of the invention.In Fig. 5; Carrier wave for example is the short-distance radio carrier signal of 38 KHzs (KHz); The control information for example is a plurality of 0 and the 1 numerical digit signal formed, and the short range radio signals that the short range radio signals telepilot is transmitted is produced by controlling information modulation short-distance radio carrier signal.Then, short range radio signals can be carried out n doubly take a sample (n is for more than or equal to any real number of 2, this example in this n be 3), to produce the short-distance radio sampled signal, wherein the short-distance radio sampled signal can be a plurality of combinations of continuous 0 and 1.The short-distance radio sampled signal can be obtained by short range radio signals extension apparatus transmitter, and the short-distance radio sampled signal can be reduced, to produce the short-distance radio recovering signal.Under the situation of the mistake of not having transmission or handling, the short-distance radio recovering signal equals short range radio signals.
Then, please with reference to Fig. 6, Fig. 6 is the short range radio signals extension apparatus receiver that provides of the embodiment of the invention 61 and the calcspar of short range radio signals extension apparatus transmitter 62.Comprise short range radio signals receiving element 611, the sample of signal unit 612 and signal transmitter unit 613 that tandem in regular turn couples near the short range radio signals extension apparatus receiver 61 of short range radio signals telepilot, comprise signal receiving unit 623, the signal reduction unit 622 and short range radio signals transmitter unit 621 that tandem in regular turn couples near 62 of the short range radio signals extension apparatus transmitters of controlled domestic electric appliance.
The short range radio signals that short range radio signals receiving element 611 receives from the short range radio signals telepilot, but short range radio signals is not decoded and demodulation, and directly short range radio signals is offered sample of signal unit 612.The 612 pairs of short range radio signals in sample of signal unit are carried out n and are doubly taken a sample, and to produce the short-distance radio sampled signal, wherein n is the real number more than or equal to 2, and n can for example be 2.8 or 3.Signal transmitter unit 613 sends out the short-distance radio sampled signal with wireless transmission method or wire transmission mode.In other words, signal transmitter unit 613 with generation wireless signal or wire signal, and is sent to radio channel or wired passage after the short-distance radio sampled signal is carried out modulation and encodes.
Wire transmission mode can be the power line communication transmission technology, and wire signal possibly be the power line communication transmission signals.Wireless transmission method can or have the transmission of wireless signals mode of check code for radio signal transmission mode, wireless signal frequency hopping transmission mode, and wireless signal maybe be for radiofrequency signal, wireless Frequency Hopping Signal, have the wireless signal of check code.If will guarantee to control the correctness of information, then can adopt transmission of wireless signals mode to realize wireless transmission method with check code.If will make wireless signal can use preferable frequency range to transmit, then can adopt wireless signal frequency hopping transmission mode to realize wireless transmission method.
Receive wireless signal or the wire signal that the short range radio signals extension apparatus receiver 61 near telepilot is produced near the short range radio signals extension apparatus transmitter of controlled domestic electric appliance 62.Wherein, signal receiving unit 623 receives wire signal through wired passage, perhaps receives wireless signal through radio channel, and in wired signal or wireless signal, obtains the short-distance radio sampled signal.In other words, 623 pairs of wire signals of signal receiving unit or wireless signal carry out demodulation and decoding, to obtain the short-distance radio sampled signal.622 pairs of short-distance radio sampled signals of signal reduction unit reduce, to obtain short-distance radio recovering signal (if the mistake of not having transmission or handling, the short-distance radio recovering signal equals short range radio signals).Short range radio signals transmitter unit 621 is not decoded and demodulation to the short-distance radio recovering signal; And directly give controlled domestic electric appliance with the short-distance radio recovering signal with the short range wireless transmission mode, the short-distance radio recovering signal that just directly passes on is given controlled domestic electric appliance.
Then, please with reference to Fig. 7, Fig. 7 is the process flow diagram of the performed short range radio signals extension method of present embodiment medium or short range wireless signal extension apparatus receiver 61.In step 71, receive short range radio signals, and short range radio signals is not carried out demodulation and decoding.In step 72, short range radio signals is carried out n doubly take a sample, to produce the short-distance radio sampled signal.In step 73, the short-distance radio sampled signal is transferred out with wireless transmission method or wire transmission mode.
Then, please with reference to Fig. 8, Fig. 8 is the process flow diagram of the performed short range radio signals extension method of present embodiment medium or short range wireless signal extension apparatus transmitter 62.In step 81, receive wire signal through wired passage, or receive wireless signal, and in wired signal or wireless signal, obtain the short-distance radio sampled signal through radio channel.In step 82, the short-distance radio sampled signal is reduced, to obtain the short-distance radio recovering signal.In step 83, send the short-distance radio recovering signal to controlled domestic electric appliance with the short range wireless transmission mode.
In sum, the embodiment of the invention provides the short range radio signals extension apparatus, can under the custom that does not change the user, let the user utilize original short range radio signals telepilot to control domestic electric appliance.For example when the user will control optical disc player; Do not need to utilize again extra short range radio signals telepilot to learn and operate; As long as use the short range radio signals telepilot of original optical disc player just can provide the short range radio signals extension apparatus to control original domestic electric appliance through the embodiment of the invention easily with the custom in past.In addition, the short range radio signals extension apparatus that the embodiment of the invention provided therefore as far as the developer, can not invaded the short range radio signals encoding and decoding patent of particular vendor because do not relate to Code And Decode yet, and the unnecessary legal issue of deriving.
Though the present invention discloses as above with embodiment; Right its is not that any person of ordinary skill in the field is not breaking away from the spirit and scope of the present invention in order to qualification the present invention; When doing a little change and retouching, so protection scope of the present invention is when being as the criterion with what claim defined.
Claims (15)
1. a short range radio signals extension method in order to extend a transmission range of a short range radio signals telepilot, is characterized in that, comprising:
Receive a short range radio signals;
This short range radio signals is carried out n doubly take a sample, to produce a short-distance radio sampled signal, wherein n is the real number more than or equal to 2; And
This short-distance radio sampled signal is sent out with a wireless transmission method or a wire transmission mode.
2. short range radio signals extension method according to claim 1 is characterized in that, wherein directly this short range radio signals that contains a carrier wave is carried out n and doubly takes a sample, and this short range radio signals is not decoded and demodulation.
3. short range radio signals extension method according to claim 2; It is characterized in that; Wherein a frequency of this carrier wave is not limited to CF; Use a receiver of this short range radio signals extension method to support the reception of a multiband, use the n of a maximum frequency of this multiband doubly this short range radio signals to be taken a sample, to guarantee that this short range radio signals is undistortedly by sampling and reduction.
4. short range radio signals extension method according to claim 1; It is characterized in that; Wherein this wire transmission mode is a power line communication transmission technology, and this wireless transmission method is that a radio signal transmission mode, a wireless signal frequency hopping transmission mode or have the transmission of wireless signals mode of check code.
5. short range radio signals extension method according to claim 1 is characterized in that, wherein this short range radio signals is produced a short-distance radio carrier signal modulation by a control information.
6. a short range radio signals extension method in order to extend a transmission range of a short range radio signals telepilot, is characterized in that, comprising:
Receive a wire signal through a wired passage, perhaps receive a wireless signal, and obtain a short-distance radio sampled signal in this wire signal or this wireless signal certainly through a radio channel;
This short-distance radio sampled signal is reduced, to obtain a short-distance radio recovering signal; And
Give a controlled domestic electric appliance to this short-distance radio recovering signal with a short range wireless transmission mode.
7. short range radio signals extension method according to claim 6 is characterized in that, the wherein not decoded and demodulation of this short-distance radio recovering signal, and directly give this controlled domestic electric appliance with this short range wireless transmission mode.
8. short range radio signals extension method according to claim 6 is characterized in that, wherein this wire signal is a power line communication transmission signals, and this wireless signal is the wireless signal that a radiofrequency signal, a wireless Frequency Hopping Signal or have check code.
9. short range radio signals extension method according to claim 6 is characterized in that, wherein this short-distance radio recovering signal is produced by a control information modulation one short-distance radio carrier signal.
10. a short range radio signals extension apparatus receiver in order to extend a transmission range of a short range radio signals telepilot, is characterized in that, comprising:
One short range radio signals receiving element receives a short range radio signals, this short range radio signals is not decoded and demodulation, and this short range radio signals directly is provided;
One sample of signal unit carries out n to this short range radio signals and doubly takes a sample, and to produce a short-distance radio sampled signal, wherein n is the real number more than or equal to 2; And
One signal transmitter unit sends out this short-distance radio sampled signal with a wireless transmission method or a wire transmission mode.
11. short range radio signals extension apparatus receiver according to claim 10; It is characterized in that; Wherein this wire transmission mode is a power line communication transmission technology, and this wireless transmission method is that a radio signal transmission mode, a wireless signal frequency hopping transmission mode or have the transmission of wireless signals mode of check code.
12. short range radio signals extension apparatus receiver according to claim 10 is characterized in that, wherein this short range radio signals is produced a short-distance radio carrier signal modulation by a control information.
13. a short range radio signals extension apparatus transmitter in order to extend a transmission range of a short range radio signals telepilot, is characterized in that, comprising:
One signal receiving unit receives a wire signal through a wired passage, perhaps receives a wireless signal through a radio channel, and obtains a short-distance radio sampled signal in this wire signal or this wireless signal certainly;
One signal reduction unit reduces to this short-distance radio sampled signal, to obtain a short-distance radio recovering signal; And
One short range radio signals transmitter unit is not decoded and demodulation to this short-distance radio recovering signal, and is directly given a controlled domestic electric appliance with a short range wireless transmission mode with this short-distance radio recovering signal.
14. short range radio signals extension apparatus transmitter according to claim 13; It is characterized in that; Wherein this wire signal is a power line communication transmission signals, and this wireless signal is the wireless signal that a radiofrequency signal, a wireless Frequency Hopping Signal or have check code.
15. short range radio signals extension apparatus transmitter according to claim 13 is characterized in that, wherein this short-distance radio recovering signal is produced by a control information modulation one short-distance radio carrier signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105129970A CN102446404A (en) | 2010-10-12 | 2010-10-12 | Short-range wireless signal extension device receiver and transmitter, and method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105129970A CN102446404A (en) | 2010-10-12 | 2010-10-12 | Short-range wireless signal extension device receiver and transmitter, and method thereof |
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| CN102446404A true CN102446404A (en) | 2012-05-09 |
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| CN2010105129970A Pending CN102446404A (en) | 2010-10-12 | 2010-10-12 | Short-range wireless signal extension device receiver and transmitter, and method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105575082A (en) * | 2014-10-14 | 2016-05-11 | 庆富造船股份有限公司 | Learning-type remote control system |
| CN109147292A (en) * | 2017-06-27 | 2019-01-04 | 关隆股份有限公司 | The radiofrequency signal extension method of wireless control system |
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| US20070133994A1 (en) * | 2005-12-09 | 2007-06-14 | Topseed Technology Corp. | Automatic frequency hopping remote controller |
| CN201111721Y (en) * | 2007-09-30 | 2008-09-10 | 武汉尚信科技有限公司 | Device for extending infrared remote-controlling signal transmission distance by radio wave |
| CN201194405Y (en) * | 2008-02-22 | 2009-02-11 | 中国科学院软件研究所 | Wireless sensor network node apparatus for speech collection and transmission |
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| US20070133994A1 (en) * | 2005-12-09 | 2007-06-14 | Topseed Technology Corp. | Automatic frequency hopping remote controller |
| CN1835041A (en) * | 2006-03-24 | 2006-09-20 | 四川长虹电器股份有限公司 | Remote signal converting system and method thereof |
| CN201111721Y (en) * | 2007-09-30 | 2008-09-10 | 武汉尚信科技有限公司 | Device for extending infrared remote-controlling signal transmission distance by radio wave |
| CN201194405Y (en) * | 2008-02-22 | 2009-02-11 | 中国科学院软件研究所 | Wireless sensor network node apparatus for speech collection and transmission |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105575082A (en) * | 2014-10-14 | 2016-05-11 | 庆富造船股份有限公司 | Learning-type remote control system |
| CN109147292A (en) * | 2017-06-27 | 2019-01-04 | 关隆股份有限公司 | The radiofrequency signal extension method of wireless control system |
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Application publication date: 20120509 |