CN104244147A - Intelligent canning method of wireless microphone receiver - Google Patents
Intelligent canning method of wireless microphone receiver Download PDFInfo
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- CN104244147A CN104244147A CN201410475276.5A CN201410475276A CN104244147A CN 104244147 A CN104244147 A CN 104244147A CN 201410475276 A CN201410475276 A CN 201410475276A CN 104244147 A CN104244147 A CN 104244147A
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Abstract
The invention discloses an intelligent canning method of a wireless microphone receiver. The method comprises the following steps that first, the receiver forms the frequency to be retrieved by a link from the lowest point of the frequency range within which the receiver can work; second, whether the gain data of the link are within a preset range or not is judged, if yes, a frequency point serves as a usable frequency point, and relevant data are recorded; third, if the gain data are not within the set range, whether the current frequency is the highest point frequency or not is judged, if not, a next retrieval frequency is generated, and then the second step is repeated; fourth, when a qualified usage frequency has not been monitored yet while the current frequency is the highest point frequency, the gain of the receiving link is reduced, and then the second step is repeated. According to the intelligent canning method of the wireless microphone receiver, the set frequency range of the intelligent scanning receiver can be realized, and noise interference and third-order intermodulation interference generated by a wireless microphone can be effectively reduced. The interference rejection capacity and the environmental adaptation capacity of products are substantially improved, and the cost of engineering installation is reduced.
Description
[technical field]
The present invention relates to wireless microphone receiver, particularly relate to a kind of intelligent scanning method of wireless microphone receiver.
[background technology]
Common amusement wireless microphone system is substantially all working in the mode of simplex.For a long time, due to this simplex mode, make the installation of wireless microphone very loaded down with trivial details.Example is installed as with the wireless microphone system in a KTV at whole-sale price, common way fits up plane graph according to this KTV, first the frequency point allocation in each room is good, and then corresponding allocation table, is adjusted to corresponding frequency by the receiver in each room and hand-held transmitting.And then roomed for institute wireless microphone is all opened, then see if there is crosstalk, the phenomenons such as noise interference, more corresponding carry out frequency trim.Sometimes even there will be interference too strong, and cannot the phenomenon of normal mounting.
[summary of the invention]
The technical problem to be solved in the present invention be to provide a kind of wireless microphone receiver antijamming capability and adaptive capacity to environment high, the intelligent scanning method of the wireless microphone receiver that project installation cost is low.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is, a kind of intelligent scanning method of wireless microphone receiver, is characterized in that, comprise the following steps:
101) receiver is from the minimum point of the frequency range that can work, forms the frequency that link will be retrieved;
102) judge that the gain data of link is whether in the gain ranging of setting; If in the gain ranging in setting, this frequency as available frequency, is recorded related data by microprocessor;
103) if the gain data of link is not in the gain ranging of setting, then judge whether ongoing frequency is peak frequency; If not, then according to the number of frequency steps of setting, generate next retrieval frequency; Then step 102 is repeated);
104) frequency if ongoing frequency peaks, does not monitor qualified frequency of utilization yet, then reduce the gain of receiver, and then repeat step 102)
The intelligent scanning method of above-described wireless microphone receiver, the link of wireless microphone receiver comprises microprocessor, Anneta module, RF Amplifier Module, the table filtering of radio frequency multi-Channel Acoustic and control module, the attenuation module of frequency generation module, frequency mixing module, intermediate frequency sound table filtration module, demodulation module, audio frequency and control signal processing module and adjustable attenuation, demodulation module and attenuation module serial connection are in a link, the control termination microprocessor of attenuation module, the link gain of demodulation module is according to output termination microprocessor; Described radio frequency multi-Channel Acoustic table filtering and control module are the table filtering of radio frequency multi-Channel Acoustic and control module, the control termination microprocessor of the table filtering of radio frequency multi-Channel Acoustic and control module; The control procedure of intelligent scanning method comprises the following steps:
201) after starting intelligent scanning, receiver, from the minimum point of the frequency range that can work, by Microprocessor S3C44B0X frequency generation module, forms the frequency that link will be retrieved together with frequency mixing module, control multi-channel rf filtration module simultaneously, select corresponding radio frequency sound table filtering channel;
202) microprocessor is by demodulator circuit module, obtains the gain data of this frequency link, the gain data judging link whether set gain ranging in; If in the gain ranging in setting, microprocessor is using this frequency as available frequency, and record related data, then exits scanning work;
203) if the gain data of link is not in the gain ranging of setting, then judge whether ongoing frequency is peak frequency; If not, then according to the number of frequency steps of setting, generate next retrieval frequency; Then step 202 is repeated);
204) frequency if ongoing frequency peaks, does not monitor qualified frequency of utilization yet, Microprocessor S3C44B0X attenuation module, reduces the gain of receiver, and then repeats step 202).
The intelligent scanning method of above-described wireless microphone receiver, when the attenuation of attenuation module arrives the maximum of default, do not retrieve available frequency yet, then system exits retrieving, again from step 201 after adjusting the environment for use of receiver) restart to retrieve.
The intelligent scanning method of above-described wireless microphone receiver, when multiple stage receiver installed by needs, first from First receiver, from step 201) retrieval, after First receiver scans available frequency, then by the set of frequency of First receiver wireless microphone transmitting terminal to this Frequency point; Before the installation completing whole receiver, each wireless microphone transmitting terminal setting frequency can not be closed.
The intelligent scanning method of above-described wireless microphone receiver, when receiver supporting two or two are with wireless microphone, each wireless microphone receiver is independent performs scanning successively, the frequency that each link of microprocessor records is corresponding, and ensure to be interposed between more than 3MHz between each link frequency.
The intelligent scanning method of above-described wireless microphone receiver, the table filtering of radio frequency multi-Channel Acoustic and control module comprise the different Surface Acoustic Wave Filter of a plurality of centre frequency and two channel selecting control chips; A plurality of Surface Acoustic Wave Filter is connected between two channel selecting control chips and forms plurality of channels, and the control end of two channel selecting control chips connects microprocessor respectively, and microprocessor directly selects control switch by I/O control channel.
The intelligent scanning method of above-described wireless microphone receiver, described link comprises intermediate frequency amplification module and gain amplification module, the output termination gain amplification module of attenuation module, the output termination frequency mixing module of gain amplification module, the output termination intermediate frequency sound table filtration module of frequency mixing module, the output termination intermediate frequency amplification module of intermediate frequency sound table filtration module, the output termination demodulation module of intermediate frequency amplification module, the output ending connecting audio of demodulation module and control signal processing module; The control signal input termination microprocessor of audio frequency and control signal processing module.。
The intelligent scanning method of above-described wireless microphone receiver, the output termination RF Amplifier Module of Anneta module, the output termination radio frequency multi-Channel Acoustic table filtering of RF Amplifier Module and control module, the output termination attenuation module of the table filtering of radio frequency multi-Channel Acoustic and control module.
The intelligent scanning method of wireless microphone receiver of the present invention, can realize the frequency range of intelligent scanning receiver setting, and effectively can reduce the third order intermodulation interference of noise interference and wireless microphone self generation.Simultaneously can noiseless frequency in automatic search frequency range, thus the manual allocation saved is loaded down with trivial details, and after environment for use changes, active link can be re-established fast, the anti-interference of product and adaptive capacity to environment are increased substantially, alleviates burden and the project installation cost of project installation simultaneously.
[accompanying drawing explanation]
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is the link block diagram of prior art wireless microphone receiver.
Fig. 2 is the link block diagram of embodiment of the present invention wireless microphone receiver.
Fig. 3 is the block diagram of the table filtering of embodiment of the present invention radio frequency multi-Channel Acoustic and control module.
Fig. 4 is the flow chart of embodiment of the present invention wireless microphone receiver intelligent scanning method.
[embodiment]
The link of embodiment of the present invention wireless microphone receiver comprises microprocessor, Anneta module, RF Amplifier Module, the table filtering of radio frequency multi-Channel Acoustic and control module, frequency generation module, frequency mixing module, intermediate frequency sound table filtration module, demodulation module, intermediate frequency amplification module, gain amplification module, the attenuation module of audio frequency and control signal processing module and adjustable attenuation.
The output termination RF Amplifier Module of Anneta module, the output termination radio frequency multi-Channel Acoustic table filtering of RF Amplifier Module and control module, the output termination attenuation module of the table filtering of radio frequency multi-Channel Acoustic and control module.The output termination gain amplification module of attenuation module, the output termination frequency mixing module of gain amplification module, the output termination intermediate frequency sound table filtration module of frequency mixing module, the output termination intermediate frequency amplification module of intermediate frequency sound table filtration module, the output termination demodulation module of intermediate frequency amplification module, the output ending connecting audio of demodulation module and control signal processing module.
The control termination microprocessor of attenuation module, the link gain of demodulation module is according to output termination microprocessor; Microprocessor, according to the pad value of the size adjustment attenuation module of link gain data, changes link gain, makes antenna efficiency in the gain ranging of setting.
The table filtering of radio frequency multi-Channel Acoustic and control module comprise the different Surface Acoustic Wave Filter of multiple centre frequency and two channel selecting control chips; Multiple Surface Acoustic Wave Filter is connected between two channel selecting control chips and forms multiple passage, and the control end of two channel selecting control chips connects microprocessor respectively, and microprocessor directly selects control switch by I/O control channel.
The control signal input termination microprocessor of audio frequency and control signal processing module.
Embodiment of the present invention wireless microphone receiver link is on the basis of conventional receiver link, add attenuation module and gain amplification module (two-stage radio-frequency gain amplification module) corresponding with it, by radio frequency multi-Channel Acoustic table filtering single for routine and control module, change controlled multi-channel rf sound table filtering control module into.Simultaneously by the compound frequency mixing module (namely mixing and intermediate frequency amplification are built in an IC) of routine, be revised as independently frequency mixing module, intermediate frequency sound table filtration module and intermediate frequency amplification module.
Attenuation module is the rf gain for regulating whole link.After it is placed on multi-channel rf sound table filtering selection control module, by regulating attenuation, the noise interference invading current communications link can be effectively reduced, coordinate gain amplification module thereafter, the work of normal communications signal can be ensured.Attenuation module, be an attenuator in fact, attenuation module is integrated chip, as HMC542A, is connected with microprocessor by SPI interface, performs gain reduction.The gain-adjusted of conventional receiver link attenuation module is fixing, and the attenuation module of the embodiment of the present invention regulates attenuation automatically according to link gain situation)
Processing circuitry of intermediate frequency comprises frequency mixing module, intermediate frequency sound table filtration module and intermediate frequency amplification module.Contain intermediate frequency in conventional mixer module to amplify, this mode effectively cannot remove the interference of third order intermodulation.Amplification and mixing are separated by the above embodiment of the present invention, add intermediate frequency filtering, so just can effectively reduce the interference of third order intermodulation, significantly strengthen the antijamming capability of receiver simultaneously.
Multi-channel rf sound table filtering control module improves on the basis of routine single sound table filtration module.It utilizes multiple arrowbands Surface Acoustic Wave Filter, is combined into an overall rf filtering module.Traditional radio frequency multi-Channel Acoustic table filtering and control module, only have a Surface Acoustic Wave Filter, and its bandwidth ratio is comparatively large, and do not control by CPU.This Surface Acoustic Wave Filter can only be wide in range the action of execution bandpass filtering.The multi-channel rf sound table filtering control module of the embodiment of the present invention, be made up of multiple Surface Acoustic Wave Filter and two channel selecting control chips, select bandwidth narrower, and the Surface Acoustic Wave Filter that centre frequency is different, by the mode that original link communication frequency range is divided into multiple frequency range to combine, select tape passband rate that can be more careful.Frequency range after the segmentation of multi-channel rf sound table filtering control module is narrower, and feature more targetedly, more effectively carries out He Ne laser, simultaneously also can better filtering noise information interference.
After embodiment of the present invention wireless microphone receiver starts intelligent scanning function, receiver starts with the minimum point of the frequency range that present receiving machine can work, corresponding frequencies is generated by Microprocessor S3C44B0X frequency generation module, coordinate the frequency that frequency mixing module formation link will be retrieved, control multi-channel rf filtering control module simultaneously, select corresponding radio frequency sound table filtering channel.
Microprocessor monitors frequency generation module, after generated frequency is stable, by demodulation module, obtains the gain data of this frequency link.Then these data are contrasted whether in the gain ranging required.If in claimed range, then illustrate that this frequency is clean, and operable frequency.The related data of this frequency of microprocessor records, then exits scanning work.
If data are not in claimed range, then judge whether ongoing frequency is peak frequency.If not, then according to the retrieval stepping of receiver setting, generate next retrieval frequency.Then repeat monitoring frequency stablize and read this frequency gain, and contrast corresponding data.
If frequency does not monitor qualified frequency of utilization after arriving peak yet.Then now need to control attenuation module, increase the attenuation of attenuation module, after reducing the gain of receiver, repeat retrieving again.
Attenuation module performs decay when decaying link gain according to default amount, if the attenuation of attenuation module arrives the maximum (now the gain of receiver is minimum) of default, do not retrieve available frequency yet, then system exits retrieval actions, now with regard to needing, the environment for use of receiver being adjusted, again performing retrieval actions afterwards.
When utilizing this intelligent scanning method installing engineering, user only needs from First receiver, performs intelligent scanning, after scanning available frequency, then by the set of frequency of wireless microphone transmitting terminal to this Frequency point.It should be noted that in order to avoid adjacent two receivers retrieve same Frequency point, before completing installation, each wireless microphone transmitting terminal setting frequency, can not close.So just can receiver be effectively avoided to scan repetition rate.
When receiver two or more wireless microphones supporting, each receiver needs independently to perform scanning successively, in order to avoid scanning repetition frequency, and the frequency of each link of microprocessor records, and ensure that each link gaps is at more than 3MHz.The correctness of scanning is ensured with this.
The above embodiment of the present invention has the following advantages:
1. effectively can reduce the interference of extraneous noise frequency, can effectively suppress the third order intermodulation in microphone system to be disturbed simultaneously.Enhance receiver greatly to the adaptive capacity of environment and antijamming capability.
2. effectively can reduce burden and the set-up time of wireless microphone system installation.And after environment for use changes, receiver can be adjusted in time, make the maintenance of user to system more simple and efficient.
Claims (8)
1. an intelligent scanning method for wireless microphone receiver, is characterized in that, comprise the following steps:
101) receiver is from the minimum point of the frequency range that can work, forms the frequency that link will be retrieved;
102) judge that the gain data of link is whether in the gain ranging of setting; If in the gain ranging in setting, this frequency as available frequency, is recorded related data by microprocessor;
103) if the gain data of link is not in the gain ranging of setting, then judge whether ongoing frequency is peak frequency; If not, then according to the number of frequency steps of setting, generate next retrieval frequency; Then step 102 is repeated);
104) frequency if ongoing frequency peaks, does not monitor qualified frequency of utilization yet, then reduce the gain of receiver, and then repeat step 102).
2. the intelligent scanning method of wireless microphone receiver according to claim 1, it is characterized in that, the link of wireless microphone receiver comprises microprocessor, Anneta module, RF Amplifier Module, the table filtering of radio frequency multi-Channel Acoustic and control module, the attenuation module of frequency generation module, frequency mixing module, intermediate frequency sound table filtration module, demodulation module, audio frequency and control signal processing module and adjustable attenuation, demodulation module and attenuation module serial connection are in a link, the control termination microprocessor of attenuation module, the link gain of demodulation module is according to output termination microprocessor; Described radio frequency sound table filtration module is the table filtering of radio frequency multi-Channel Acoustic and control module, the control termination microprocessor of the table filtering of radio frequency multi-Channel Acoustic and control module; The control procedure of intelligent scanning method comprises the following steps:
201) after starting intelligent scanning, receiver, from the minimum point of the frequency range that can work, by Microprocessor S3C44B0X frequency generation module, forms the frequency that link will be retrieved together with frequency mixing module, control multi-channel rf filtration module simultaneously, select corresponding radio frequency sound table filtering channel;
202) microprocessor is by demodulator circuit module, obtains the gain data of this frequency link, the gain data judging link whether set gain ranging in; If in the gain ranging in setting, microprocessor is using this frequency as available frequency, and record related data, then exits scanning work;
203) if the gain data of link is not in the gain ranging of setting, then judge whether ongoing frequency is peak frequency; If not, then according to the number of frequency steps of setting, generate next retrieval frequency; Then step 202 is repeated);
204) frequency if ongoing frequency peaks, does not monitor qualified frequency of utilization yet, Microprocessor S3C44B0X attenuation module, reduces the gain of receiver, and then repeats step 202).
3. the intelligent scanning method of wireless microphone receiver according to claim 2, it is characterized in that, when the attenuation of attenuation module arrives the maximum of default, do not retrieve available frequency yet, then system exits retrieving, again from step 201 after adjusting the environment for use of receiver) restart to retrieve.
4. the intelligent scanning method of wireless microphone receiver according to claim 2, it is characterized in that, when multiple stage receiver installed by needs, first from First receiver, from step 201) retrieval, after First receiver scans available frequency, then by the set of frequency of First receiver wireless microphone transmitting terminal to this Frequency point; Before the installation completing whole receiver, each wireless microphone transmitting terminal setting frequency can not be closed.
5. the intelligent scanning method of wireless microphone receiver according to claim 1, it is characterized in that, when receiver supporting two or two are with wireless microphone, each wireless microphone receiver is independent performs scanning successively, the frequency that each link of microprocessor records is corresponding, and ensure to be interposed between more than 3MHz between each link frequency.
6. the intelligent scanning method of wireless microphone receiver according to claim 2, is characterized in that, the table filtering of radio frequency multi-Channel Acoustic and control module comprise the different Surface Acoustic Wave Filter of a plurality of centre frequency and two channel selecting control chips; A plurality of Surface Acoustic Wave Filter is connected between two channel selecting control chips and forms plurality of channels, and the control end of two channel selecting control chips connects microprocessor respectively.
7. the intelligent scanning method of wireless microphone receiver according to claim 2, it is characterized in that, described link comprises intermediate frequency amplification module and gain amplification module, the output termination gain amplification module of attenuation module, the output termination frequency mixing module of gain amplification module, the output termination intermediate frequency sound table filtration module of frequency mixing module, the output termination intermediate frequency amplification module of intermediate frequency sound table filtration module, the output termination demodulation module of intermediate frequency amplification module, the output ending connecting audio of demodulation module and control signal processing module; The control signal input termination microprocessor of audio frequency and control signal processing module.
8. the intelligent scanning method of wireless microphone receiver according to claim 2, it is characterized in that, the output termination RF Amplifier Module of Anneta module, the output termination radio frequency multi-Channel Acoustic table filtering of RF Amplifier Module and control module, the output termination attenuation module of the table filtering of radio frequency multi-Channel Acoustic and control module.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108683976A (en) * | 2018-05-15 | 2018-10-19 | 深圳市创视微智能技术有限公司 | Wireless microphone converter technique based on one-way communication |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100142735A1 (en) * | 2008-12-10 | 2010-06-10 | Samsung Electronics Co., Ltd. | Audio apparatus and signal calibration method thereof |
| CN101827295A (en) * | 2009-12-23 | 2010-09-08 | 杨志豪 | Wireless microphone and anti-interference method thereof |
| CN103747375A (en) * | 2013-12-27 | 2014-04-23 | 杨志豪 | A method for automatically installing a wireless microphone |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100142735A1 (en) * | 2008-12-10 | 2010-06-10 | Samsung Electronics Co., Ltd. | Audio apparatus and signal calibration method thereof |
| CN101827295A (en) * | 2009-12-23 | 2010-09-08 | 杨志豪 | Wireless microphone and anti-interference method thereof |
| CN103747375A (en) * | 2013-12-27 | 2014-04-23 | 杨志豪 | A method for automatically installing a wireless microphone |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108683976A (en) * | 2018-05-15 | 2018-10-19 | 深圳市创视微智能技术有限公司 | Wireless microphone converter technique based on one-way communication |
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