CN1764092A - Method for preventing transmitting-receiving disturbance of electronic input apparatus signal - Google Patents
Method for preventing transmitting-receiving disturbance of electronic input apparatus signal Download PDFInfo
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- CN1764092A CN1764092A CN 200410086407 CN200410086407A CN1764092A CN 1764092 A CN1764092 A CN 1764092A CN 200410086407 CN200410086407 CN 200410086407 CN 200410086407 A CN200410086407 A CN 200410086407A CN 1764092 A CN1764092 A CN 1764092A
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Abstract
The method for an electronic equipment to avoid receive and send frequency interference comprises: connecting host computer with unidirectional multi-frequency channel receiving unit; matching with software program, setting different start frequencies for receive and transmit signal frequency channel to mouse, keyboard, remote control arrangement and voice input device, forming signal receive and transmit identification without mutual interference; to input signal from multiple equipments of same type, executing frequency hopping automatically according to set channel and way, changing frequency channel, and forming detection identification and interference preventing for signal from unidirectional send and auto frequency hopping electronic equipment.
Description
Technical field
The present invention relates to a kind of method for preventing transmitting-receiving disturbance of electronic input apparatus signal, relating in particular to a kind of utilization has the automatic frequency-hopping function, is assembled in the signal receiving end on the main frame, the frequency that cooperates the setting of opening the beginning frequency channels that different electronic input apparatus transmit, carry out identification and automatic frequency-hopping that signal receives, avoid frequency interferences and the difficult method of signal identification between signal that electronic input apparatus launches simultaneously.
Background technology
The configuration and the use of computer at present, because the restriction on equipment cost and the space, main frame of normal employing connects electronic equipments such as a plurality of mouses, keyboard, remote controller, acoustic input dephonoprojectoscope, provides many people to utilize a plurality of input equipments to share a main frame; Or be the cooperation multimedia function, and connect electronic equipments such as mouse, keyboard, remote controller, acoustic input dephonoprojectoscope respectively.Traditionally, it is as signal transmission media and control by switch that known described a plurality of electronic equipments are connected with the signal transmission of computer, and it is wired that this transmission connects, in concrete connection and use, can be subjected to the restriction of connecting line length, also there is the mixed and disorderly problem of vision in wiring in connecting line aspect safeguarding, and its impeding property and line body imperfect maintenance or damaged by rats etc. also can cause the problems such as bad of transmitting.
Maturation along with the wireless receiving and dispatching transmission technology, such as the WLAN LAN of the two-way multi-channel signal transmitting-receiving of radio frequency (RF) wireless transmit-receive technology and tool and blue teeth wireless transmit-receive technology etc., be applied to electronic equipment, as mouse, keyboard, remote controller, the signal emission of acoustic input dephonoprojectoscope (as wireless microphone etc.) etc. and intercomputer with receive, described WLAN LAN and blue teeth wireless transmit-receive technology, be to adopt the frequency specification of 2.4GHz for its signal transmitting and receiving, and the bidirectional transmit-receive frequency is set at the change of carrying out frequency between 2420MHz～2460MHz more, promptly only provide the two-way signaling transmitting-receiving at the frequency range of 40MHz, therefore, when in a certain regional extent, having a plurality of electronic equipments to transmit simultaneously, the easily phase mutual interference of frequency between the signal of each electronic equipment bidirectional transmit-receive of generation, make main frame intactly received signal can't judge that maybe the signal of reception is launched maybe by which electronic equipment to discern correct signal content, cause the difficulty in the use.
Content of the present invention
One of main purpose of the present invention, provide a kind of method for preventing transmitting-receiving disturbance of electronic input apparatus signal, mainly utilize the automatic frequency-hopping function of receiving element, and the identification frequency of setting that opens the beginning frequency channels that transmits of different electronic input apparatus, finish identification and automatic frequency-hopping that signal receives, detecting identification and the interference of carrying out the signal of unidirectional emission multichannel automatic frequency-hopping electronic input apparatus emission prevent.
In order to achieve the above object, method for preventing transmitting-receiving disturbance of electronic input apparatus signal of the present invention mainly utilizes the receiving element with unidirectional multi-frequency channel to connect main frame, receiving element cooperates software program, corresponding mouse, keyboard, different types of electronic input apparatus such as remote control and acoustic input dephonoprojectoscope, set the different frequencies that opens beginning receiving and transmitting signal frequency channels, form no mutual interference signals transmitting-receiving identification, and for signal emission with a plurality of electronic equipments in the kind, cooperate described software program, when received signal is interfered, automatically according to multi-hop frequency domain channel and the frequency hopping mode set, carry out frequency hopping, the conversion frequency channel, detecting identification and the interference of carrying out the signal of unidirectional emission multichannel automatic frequency-hopping electronic input apparatus emission prevent.
Brief description of drawings
Fig. 1 is the signal transmitting and receiving Organization Chart of the specific embodiment of the invention;
Fig. 2 is that the specific embodiment of the invention is set the schematic diagram that various types of electronic input apparatus opens beginning receiving and transmitting signal frequency channels and frequency hopping channel;
Fig. 3 is the receiving element automatic frequency-hopping operational flowchart of the specific embodiment of the invention;
Fig. 4 is that specific embodiment of the invention signal receives with automatic frequency-hopping and prevents the operational flowchart that disturbs.
In the accompanying drawing, the list of parts of each label representative is as follows:
1-main frame 2-electronic input apparatus
11-receiving element 20-electronic equipment
200～212-flow process, 300～310-flow process
Embodiment
In order to make those skilled in the art further understand feature of the present invention and technology contents, see also following about detailed description of the present invention and accompanying drawing, accompanying drawing only provide with reference to and usefulness is described, be not to be used for limiting the present invention.
Fig. 1 is the signal transmitting and receiving Organization Chart of specific embodiment of the invention method for preventing transmitting-receiving disturbance of electronic input apparatus signal, described signal transmitting and receiving framework comprises: the receiving element 11 that connects main frame 1, and a plurality of various types of electronic input apparatus 2 that contain the wireless signal transmission function, described various types of electronic input apparatus 2 can further comprise a plurality of identical electronic equipments 20, and can operate by the user and launch input data or command signal.
Described various types of electronic input apparatus 2, in the specific embodiment framework, it can be mouse, keyboard, remote control or acoustic input dephonoprojectoscope etc., in the wherein various types of electronic input apparatus 2, the electronic equipment 20 that further comprises a plurality of identical type electronic input apparatus 2, as in mouse kind electronic input apparatus, including a plurality of mouses, include a plurality of keyboards in the keyboard classes electronic equipment, include a plurality of remote controls in the remote control kind class of electronic devices, include a plurality of acoustic input dephonoprojectoscopes in the acoustic input dephonoprojectoscope kind class of electronic devices, to provide many people to operate respectively, import the emission of data or command signal.
Described various types of electronic input apparatus 2, be set with different signal tranmitting frequencies respectively, make receiving element 11 to set the corresponding receive frequency channel that begins that opens at receiving element 11 and signal receiving end according to different signal tranmitting frequencies, there is not mutual interference signals transmitting-receiving identification, the signal emission simultaneously of a plurality of electronic equipments 20 in the same kind, then can according to the different beginning receive frequency channels that opens the first different frequency hopping channels be set respectively by receiving element 11, as shown in Figure 2, in the present invention's one specific embodiment, with the keyboard type electronic input apparatus to open beginning receive frequency channel and the first frequency hopping channel setting be 2481MHz; Mouse electron-like input equipment to open beginning receive frequency channel and the first frequency hopping channel setting be 2479MHz; Remote control electron-like input equipment to open beginning receive frequency channel and the first frequency hopping channel setting be 2477MHz etc., set by that analogy and form sub-received signal channel, like this, the frequency hopping mode that can cooperate software program to set, automatically when being interfered, carries out signal transmitting and receiving continuous frequency hopping, the modulating frequency channel is in case the interference of stop signal.
A plurality of same electronic device 20 in the described same kind, can further be preset with the independent different identification signal frequencies that produce respectively, in order to form the emission of consecutive signal with input data, order, like this, when receiving element 11 receives the signal of launching from a plurality of same electronic device 20, can cooperate the automatic frequency-hopping function of receiving element 11 settings by the different identification signal frequencies of setting, obtain the effect that prevents of better signal transmitting and receiving interference.
Described identification signal frequency, in specific embodiment, be the signal frequencies that a plurality of position rearranges, and can adopt as various figure places such as 4bit, 5bit, 6bit... and arrange, to offer in the various types of electronic equipment 2 a plurality of electronic equipments 20 with the unlike signal frequency emission.
The described receiving element 11 that is connected in main frame 1, in specific embodiment of the invention framework, it is the receiving terminal of a RF transmit-receive technology, input data, the command signal of described each electronic input apparatus 2 of unidirectional reception and 20 emissions of a plurality of electronic equipment, and receiving element 11 has the automatic frequency-hopping function, can receive when being interfered automatically to stride according to frequency hopping mode of setting and order at signal to skip to another frequency channels and carry out signal and receive.
The automatic frequency-hopping mode of described receiving element 11 as shown in Figure 2, in the method for the invention, it is 2401MHz～2481MHz that receiving element 11 cooperates software program to set its receive frequency, contain 80 frequency channels, the frequency variation of each frequency channels is 5MHz, simultaneously, receiving element 11 further cooperates software program to set a plurality of frequency hopping channels, in specific embodiment shown in Figure 2, be set at 16 frequency hopping channels and describe, like this, when carrying out the frequency hopping change each time, to produce the frequency variation of 5 frequency channels, the operation of its reality is shown in the frequency hopping operating process of Fig. 3:
With various types of electronic input apparatus 2 corresponding sub-received signal channels in, be to open beginning receive frequency channel and the first frequency hopping channel for the main frequency channels that transmits that receives, as flow process 200 by what set;
Receiving element 11 receives the signal of electronic input apparatus 2 or electronic equipment 20 emissions, as flow process 202, the reception of described signal is to be begun to carry out signal and received by open beginning receive frequency channel and the first frequency hopping channel that each electronic input apparatus 2 is set, and whether be subjected to the judgement that signal disturbs immediately, as flow process 204;
If signal receives and is not interfered, then continue to carry out signal and receive by described frequency channels, electronic input apparatus 2 or electronic equipment 20 operate as normal are as flow process 206;
Be interfered if judge the signal reception, then, for example stride and jump to the 6th frequency hopping channel, as flow process 208 by the 1st frequency hopping channel automatically according to the frequency frequency hopping change of the frequency channels of setting; Judge once more whether the signal reception is interfered, as flow process 210, if signal still is interfered, then continue frequency hopping to the 11 frequency hopping channels, as flow process 212, but frequency hopping changes to glitch-free accepting state with frequency channels so constantly, if be interfered in each frequency hopping channel signals reception, just carry out a frequency hopping again and arrive the frequency hopping channel of next setting, so just can produce and continue frequency hopping automatically, the channel that the change signal receives, and (as shown in Figure 2, the keyboard type electronic input apparatus is set at 2481MHz further to cooperate beginning receive frequency channel and the 1st frequency hopping channel setting different of opening of various types of electronic input apparatus 2, the mouse class is set at 2479MHz, the remote control class is set at 2477MHz) correctly and intactly receive the signal that each electronic equipment 20 is launched.
According to embodiment method for preventing transmitting-receiving disturbance of electronic input apparatus signal framework of the present invention and frequency hopping mode, cooperate Fig. 4 to describe the operating process of described method for preventing transmitting-receiving disturbance of electronic input apparatus signal of the present invention in detail below:
The user sets different begin the receive frequency channel and the first frequency hopping channels of opening according to various types of electronic input apparatus 2, and as flow process 300, wherein said keyboard type electronic input apparatus is set at 2481MHz; The mouse class is set at 2479MHz; The remote control class is set at 2477MHz, as shown in Figure 2, forms sub-received signal channel setting;
By the frequency hopping rate of the striding number of channel of software program setting frequency hopping mode, as flow process 302, setting each time as Fig. 2 institute example, frequency hopping is to stride to jump 5 frequency channels;
A plurality of electronic equipments 20 in various types of electronic input apparatus 2 and the described same kind are launched opening the beginning signal frequency and importing data, order the consecutive signal of forming, as flow process 304 by setting;
Receiving element opens beginning receiving and transmitting signal frequency channels identification frequency according to what receive various types of electronic input apparatus 2, and the signal frequency of various types of electronic input apparatus 2 emissions of identification makes various types of electronic input apparatus operate as normal, transmits, as flow process 306;
Receiving element transmits for a plurality of electronic equipments 20 in the same kind that receives simultaneously, when received signal is interfered, carries out frequency hopping according to the frequency hopping mode of setting automatically, and the conversion frequency channel transmits with correct and complete reception, as flow process 308;
With the transmitting of a plurality of electronic equipments 20 in the kind, identification is correct according to correct and complete reception for receiving element, and continues to receive the input data or the command signal of each electronic equipment 20 emission, as flow process 310.
The present invention sets the different receiving and transmitting signal frequency channels that begins that opens according to described to various types of electronic input apparatus, and to be set be the first frequency hopping channel, there is not mutual interference signals transmitting-receiving identification, and the input signal of launching for congener a plurality of electronic equipments cooperates described software program, when received signal is interfered, automatically carry out frequency hopping according to the frequency hopping channel of setting, the conversion frequency channel, detecting identification and the interference of carrying out the signal of unidirectional emission multichannel automatic frequency-hopping electronic input apparatus emission prevent.
The above only is the preferred embodiments of the present invention, be not so promptly limit claim of the present invention, the equivalent structure transformation that every utilization specification of the present invention and accompanying drawing content are done, or directly or indirectly be used in other relevant technical field, all in like manner be included in the claim of the present invention.
Claims (10)
1. method for preventing transmitting-receiving disturbance of electronic input apparatus signal, it is characterized in that, be used for the electronic input apparatus signal transmitting-receiving and disturb the device that prevents, this device comprises that one has the receiving element of multi-frequency channel and multi-hop frequency domain channel, described receiving element is connected in main frame as signal receiving end, and a plurality of electronic input apparatus are as the signal transmitting terminal, signal to described signal receiving end unidirectional emission input, described signal transmitting and receiving interference preventing method comprises: utilize the receiving element with unidirectional multi-frequency channel to connect main frame, the corresponding different types of electronic input apparatus of described receiving element is set the different receiving and transmitting signal frequency channels that begins that opens, and forms no mutual interference signals transmitting-receiving identification; Input signal for congener a plurality of electronic equipment emissions, when received signal is interfered, automatically according to the frequency hopping mode of setting, carry out frequency hopping, the conversion frequency channel, received signal, detecting identification and the interference of carrying out the signal of unidirectional emission multichannel automatic frequency-hopping electronic input apparatus emission prevent.
2. method for preventing transmitting-receiving disturbance of electronic input apparatus signal as claimed in claim 1 is characterized in that, a plurality of frequency channels of described receiving element and frequency hopping mode are set by software program and operation automatically.
3. method for preventing transmitting-receiving disturbance of electronic input apparatus signal as claimed in claim 1 is characterized in that, a plurality of frequency channels of described receiving element are respectively the different transmitting-receiving frequencies with setpoint frequency difference.
4. method for preventing transmitting-receiving disturbance of electronic input apparatus signal as claimed in claim 1 is characterized in that, a plurality of frequency hopping channels of described receiving element will produce the frequency variation of a plurality of frequency channels of setting when carrying out the frequency hopping change each time.
5. method for preventing transmitting-receiving disturbance of electronic input apparatus signal as claimed in claim 1 is characterized in that, the frequency hopping mode of described receiving element comprises:
When receiving the signal of various types of electronic input apparatus emission, by set open beginning receive frequency channel and the first frequency hopping channel is the main frequency channels that transmits that receives;
When receiving element receives the signal of described electronic input apparatus and electronic equipment emission, whether be subjected to the judgement that signal disturbs;
If signal receives and is not interfered, then continue to carry out signal and receive described electronic input apparatus and electronic equipment operate as normal by described frequency channels;
Be interfered if judge the signal reception, then automatically according to the frequency frequency hopping change of the frequency channels of setting, carry out frequency hopping, change receive frequency channel is correctly and intactly to receive the signal of described various types of electronic input apparatus and electronic equipment emission.
6. method for preventing transmitting-receiving disturbance of electronic input apparatus signal as claimed in claim 5, it is characterized in that, the frequency hopping mode of described method further comprises: described receiving element is when judging that the signal reception is interfered, automatically the frequency frequency hopping according to the frequency channels of setting changes, carry out frequency hopping, change the receiving channels channel, and automatically perform the channel channel that frequency hopping is operated the no signal interference constantly, correctly and intactly to receive the signal of various types of electronic input apparatus and electronic equipment emission.
7. method for preventing transmitting-receiving disturbance of electronic input apparatus signal as claimed in claim 1, it is characterized in that, the difference that described various types of electronic input apparatus has setting opens beginning receiving and transmitting signal frequency channels, and set the first frequency hopping channel that described initial receiving and transmitting signal frequency channels is described kind electronic input apparatus, form no mutual interference signals transmitting-receiving identification.
8. method for preventing transmitting-receiving disturbance of electronic input apparatus signal as claimed in claim 1, it is characterized in that, described various types of electronic input apparatus is mouse, keyboard, remote controller or acoustic input dephonoprojectoscope, described various types of electronic input apparatus comprises a plurality of identical electronic equipments, comprises mouse, keyboard, remote controller or acoustic input dephonoprojectoscope.
9. method for preventing transmitting-receiving disturbance of electronic input apparatus signal, it is characterized in that, be used for the electronic input apparatus signal transmitting-receiving and disturb the device that prevents, this device comprises that one has the receiving element of multi-frequency channel and multi-hop frequency domain channel, described receiving element is connected in main frame as signal receiving end, and a plurality of electronic input apparatus are as the signal transmitting terminal, and to the signal of described signal receiving end unidirectional emission input, the step of described signal transmitting and receiving interference preventing method comprises:
Described receiving element provides a plurality of signal transmitting and receiving frequency channels;
Described receiving element is set the frequency hopping rate of the striding number of channel of a plurality of frequency hopping channels and each frequency hopping channel of carrying out according to described a plurality of frequency channels;
What described receiving element was set various types of electronic input apparatus opens beginning receiving and transmitting signal frequency channels, and sets that described to open beginning receiving and transmitting signal frequency channels be the first frequency hopping channel;
The consecutive signal that a plurality of electronic input apparatus emissions in described various types of electronic input apparatus and the same kind are made up of identification signal frequency and input data, order;
Described receiving element opens beginning receiving and transmitting signal frequency channels identification frequency according to the described various types of electronic input apparatus that receives, the signal of the described various types of electronic input apparatus emission of identification, and described various types of electronic input apparatus operate as normal transmits;
Described receiving element reception transmits with a plurality of electronic input apparatus in the kind, when received signal is interfered, carries out frequency hopping according to the frequency hopping channel of described setting automatically, and the conversion frequency channel is with the signal of correct and complete reception emission;
With the transmitting of a plurality of electronic input apparatus in the kind, identification is correct according to correct and complete reception for described receiving element, and continues to receive the input data or the command signal of each electronic input apparatus emission.
10. method for preventing transmitting-receiving disturbance of electronic input apparatus signal, it is characterized in that, the described electronic input apparatus signal that is used for is received and dispatched the device that interference prevents, this device comprises that one has the receiving element of multi-frequency channel and multi-hop frequency domain channel, described receiving element is connected in main frame as signal receiving end, and a plurality of electronic input apparatus are as the signal transmitting terminal, and to the signal of described signal receiving end unidirectional emission input, described signal transmitting and receiving interference preventing method comprises:
Described receiving element provides a plurality of signal transmitting and receiving frequency channels;
Described receiving element is set the frequency hopping rate of the striding number of channel of a plurality of frequency hopping channels and each frequency hopping channel of carrying out according to described a plurality of frequency channels;
Described receiving element is set the receiving and transmitting signal frequency channels that begins that opens of described various types of electronic input apparatus, and the described beginning receiving and transmitting signal frequency channels that opens is set at the first frequency hopping channel;
The consecutive signal that a plurality of electronic input apparatus emissions in described various types of electronic input apparatus and the same kind are made up of identification signal frequency and input data, order;
Described receiving element opens beginning receiving and transmitting signal frequency channels identification frequency according to the described various types of electronic input apparatus that receives, and the signal of the described various types of electronic input apparatus emission of identification makes described various types of electronic input apparatus operate as normal, transmits;
Described receiving element receives the described signal that contains the different identification signal frequencies that described each electronic equipment sets with a plurality of electronic input apparatus emissions in the kind, carry out signal and disturb judgement, and when received signal is interfered, automatically carry out frequency hopping according to the frequency hopping channel of described setting, the conversion frequency channel transmits with correct and complete reception;
Described identification is correct with the transmitting of a plurality of electronic input apparatus in the kind according to correct and complete reception for described receiving element, and continues to receive the input data or the command signal of described each electronic input apparatus emission.
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| CN 200410086407 CN1764092A (en) | 2004-10-20 | 2004-10-20 | Method for preventing transmitting-receiving disturbance of electronic input apparatus signal |
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| CN 200410086407 CN1764092A (en) | 2004-10-20 | 2004-10-20 | Method for preventing transmitting-receiving disturbance of electronic input apparatus signal |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100461227C (en) * | 2007-02-14 | 2009-02-11 | 湖南万友智能技术发展有限公司 | Industrial radio remote controller |
| CN101202594B (en) * | 2006-12-15 | 2012-03-21 | 致伸科技股份有限公司 | Method for exchanging frequency of wireless peripheral unit |
| CN103391113A (en) * | 2013-07-03 | 2013-11-13 | 深圳雷柏科技股份有限公司 | Wireless keyboard mouse and frequency hopping RF (Radio Frequency) communication transmitting and receiving method and device thereof |
| CN104731383A (en) * | 2013-12-19 | 2015-06-24 | 深圳市启望科文技术有限公司 | Air mouse, controlled equipment and control method and device based on air mouse |
| CN105185074A (en) * | 2015-07-29 | 2015-12-23 | 芜湖美的厨卫电器制造有限公司 | Frequency hopping method for household appliance radio frequency remote control and household appliance radio frequency remote control system |
| CN108226880A (en) * | 2017-12-29 | 2018-06-29 | 努比亚技术有限公司 | Ultrasonic distance detects anti-tampering method, apparatus and storage medium |
| CN108988981A (en) * | 2017-06-02 | 2018-12-11 | 罗德施瓦兹两合股份有限公司 | Jamming equipment and interference method |
| CN114124150A (en) * | 2021-12-13 | 2022-03-01 | 上海布鲁可积木科技有限公司 | Building block remote control-based frequency hopping communication method, system, medium and building block toy |
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2004
- 2004-10-20 CN CN 200410086407 patent/CN1764092A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101202594B (en) * | 2006-12-15 | 2012-03-21 | 致伸科技股份有限公司 | Method for exchanging frequency of wireless peripheral unit |
| CN100461227C (en) * | 2007-02-14 | 2009-02-11 | 湖南万友智能技术发展有限公司 | Industrial radio remote controller |
| CN103391113A (en) * | 2013-07-03 | 2013-11-13 | 深圳雷柏科技股份有限公司 | Wireless keyboard mouse and frequency hopping RF (Radio Frequency) communication transmitting and receiving method and device thereof |
| CN104731383A (en) * | 2013-12-19 | 2015-06-24 | 深圳市启望科文技术有限公司 | Air mouse, controlled equipment and control method and device based on air mouse |
| CN104731383B (en) * | 2013-12-19 | 2017-12-29 | 深圳市启望科文技术有限公司 | A kind of mouse of navigating, controlled plant and control method and device based on boat mouse |
| CN105185074A (en) * | 2015-07-29 | 2015-12-23 | 芜湖美的厨卫电器制造有限公司 | Frequency hopping method for household appliance radio frequency remote control and household appliance radio frequency remote control system |
| CN108988981A (en) * | 2017-06-02 | 2018-12-11 | 罗德施瓦兹两合股份有限公司 | Jamming equipment and interference method |
| CN108988981B (en) * | 2017-06-02 | 2024-01-05 | 罗德施瓦兹两合股份有限公司 | Interference device and interference method |
| CN108226880A (en) * | 2017-12-29 | 2018-06-29 | 努比亚技术有限公司 | Ultrasonic distance detects anti-tampering method, apparatus and storage medium |
| CN108226880B (en) * | 2017-12-29 | 2021-11-02 | 努比亚技术有限公司 | Method and device for preventing interference in ultrasonic distance detection and storage medium |
| CN114124150A (en) * | 2021-12-13 | 2022-03-01 | 上海布鲁可积木科技有限公司 | Building block remote control-based frequency hopping communication method, system, medium and building block toy |
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Open date: 20060426 |