CN104486709A - Wireless microphone system based on frequency signal modulating technology - Google Patents
Wireless microphone system based on frequency signal modulating technology Download PDFInfo
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- CN104486709A CN104486709A CN201410778968.7A CN201410778968A CN104486709A CN 104486709 A CN104486709 A CN 104486709A CN 201410778968 A CN201410778968 A CN 201410778968A CN 104486709 A CN104486709 A CN 104486709A
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Abstract
The invention discloses a wireless microphone system based on a frequency signal modulating technology. A frequency regulating signal is added into a voice frequency and radio frequency signal, frequency aligning and regulating functions of a wireless microphone are realized by adopting a mode of demodulating a constant-frequency signal on a receiver; the frequency aligning operable distance is long, the interferences are small, and linear frequency aligning is not needed. Moreover, the wireless microphone system is used for regulating the frequency on the microphone, and the operator does not need to walk to a position in front of the receiver to operate and regulate during regulation, so that the use is very convenient and accurate. The transmission of a frequency modulated signal is realized by the sound frequency carrier, and an extract transmission communication device is not needed to be arranged, so that the production cost of the microphone is greatly reduced.
Description
Technical field
The present invention relates to a kind of wireless microphone system, particularly based on the wireless microphone system of frequency signal modulation technology.
Background technology
Existing wireless microphone be all adopt infraredly to carry out microphone frequency range to frequently to mode frequently, but infrared operating distance is short, and could use in the scope needing microphone to take receiver 1 meter, it is very inconvenient to use.Microphone and receiver arrange the production cost that infrared device or other radio-frequency (RF) component all can increase wireless microphone system.And current wireless microphone system, when regulating frequency, all needs to operate on the receiver, therefore when needs regulate microphone tranmitting frequency, need to go to the enterprising line operate adjustment of receiver, it is very inconvenient to use.
Summary of the invention
For solving the problem, the object of the present invention is to provide a kind of to frequency operating distance length, the wireless microphone system based on frequency signal modulation technology that can reduce production cost and die sinking cost.
The present invention solves the technical scheme that its problem adopts:
Based on the wireless microphone system of frequency signal modulation technology, comprise wireless microphone radiating circuit and wireless microphone receiving circuit, described wireless microphone radiating circuit comprises the audio input end connected successively, FM modulation module, power amplification circuit and transmitting antenna, also comprise MCU module, for regulating the frequency adjustment module of microphone rf frequency and for frequency-fixed signal being loaded into the PILOT modulation module in FM modulation module, described frequency adjustment is connected with MCU module, MCU module exports corresponding frequency information to PILOT modulation module according to frequency adjustment module, PILOT modulation module is loaded in FM modulation module by determining frequency information, described wireless microphone receiving circuit comprises the reception antenna connected successively, FM demodulation module, audio output, also comprise for by frequency-fixed signal demodulation PILOT demodulation module out, MCU module and for regulating the frequency regulation block of receive frequency, the output of described FM demodulation module is connected with the input of PILOT demodulation module, the output of PILOT demodulation module is connected with MCU module, the output of MCU module is connected with FM demodulation module by frequency regulation block.
Further, described MCU module is connected with the control end of FM modulation module, and first during regulating frequency, audio signal and frequency-fixed signal are modulated in a default frequency by FM modulation module, after signal sends, MCU module control FM modulation module regulates its carrier frequency for regulated frequency.
Further, described frequency adjustment module is the frequency adjustment button be arranged on microphone casing body.
The invention has the beneficial effects as follows: the wireless microphone system based on frequency signal modulation technology that the present invention adopts, by adding frequency adjusting signals in audio radio-frequency signal, the mode demodulating frequency-fixed signal at receiver place achieve wireless microphone to frequently and Frequency Adjustment Function, to frequently can operating distance long, interference is few, without the need to straight line to frequently, and the present invention regulates frequency at microphone place, without the need to going to the adjustment of receiver advance line operate during adjustment, it is very convenient, accurate to use.Because the present invention utilizes sound carrier to achieve the transmission of FM signal, without the need to arranging extra transport communication device, greatly save the production cost of microphone.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and example, the invention will be further described.
Fig. 1 is the theory diagram of wireless microphone radiating circuit of the present invention;
Fig. 2 is the theory diagram of wireless microphone receiving circuit of the present invention.
Embodiment
Shown in Fig. 2, the present invention is based on the wireless microphone system of frequency signal modulation technology, comprise wireless microphone radiating circuit and wireless microphone receiving circuit, described wireless microphone radiating circuit comprises the audio input end connected successively, FM modulation module, power amplification circuit and transmitting antenna 1, also comprise MCU module, for regulating the frequency adjustment module of microphone rf frequency and for frequency-fixed signal being loaded into the PILOT modulation module in FM modulation module, described frequency adjustment is connected with MCU module, MCU module exports corresponding frequency information to PILOT modulation module according to frequency adjustment module, PILOT modulation module is loaded into determining frequency information in FM modulation module.During transmission, user regulates the tranmitting frequency of microphone by the frequency adjustment module on microphone, MCU module sends to PILOT modulation module according to the adjustment of user by determining information frequently accordingly, PILOT is the frequency-fixed signal of microphone, by PILOT modulation module, frequency-fixed signal is loaded in FM modulation module, and be modulated in audio signal, audio signal is exported by transmitting antenna 1 after power amplification circuit amplifies, and the audio signal of therefore launching can comprise microphone signal and the frequency adjusting signals of microphone simultaneously.Described frequency adjustment module is the frequency adjustment button be arranged on microphone casing body.
Further, described MCU module is connected with the control end of FM modulation module, and first during regulating frequency, audio signal and frequency-fixed signal are modulated in a default frequency by FM modulation module, after signal sends, MCU module control FM modulation module regulates its carrier frequency for regulated frequency.
Described wireless microphone receiving circuit comprises the reception antenna 2, FM demodulation module, the audio output that connect successively, also comprise for by frequency-fixed signal demodulation PILOT demodulation module out, MCU module and for regulating the frequency regulation block of receive frequency, the output of described FM demodulation module is connected with the input of PILOT demodulation module, the output of PILOT demodulation module is connected with MCU module, and the output of MCU module is connected with FM demodulation module by frequency regulation block.During reception, radiofrequency signal is demodulated into audio signal and exports from audio output by FM demodulation module, meanwhile, PILOT demodulation module demodulates frequency-fixed signal in restituted signal, and MCU is according to the receive frequency of described frequency-fixed signal control frequency adjusting module adjustment FM demodulation module.
The present invention by adding frequency adjusting signals in audio radio-frequency signal, the mode demodulating frequency-fixed signal at receiver place achieve wireless microphone to frequently and Frequency Adjustment Function, to frequently can operating distance long, interference is few, without the need to straight line to frequently, and the present invention regulates frequency at microphone place, without the need to going to the adjustment of receiver advance line operate during adjustment, it is very convenient, accurate to use.Because the present invention utilizes sound carrier to achieve the transmission of FM signal, without the need to arranging extra transport communication device, greatly save the production cost of microphone.
The above, just preferred embodiment of the present invention, the present invention is not limited to above-mentioned execution mode, as long as it reaches technique effect of the present invention with identical means, all should belong to protection scope of the present invention.
Claims (3)
1. based on the wireless microphone system of frequency signal modulation technology, it is characterized in that: comprise wireless microphone radiating circuit and wireless microphone receiving circuit, described wireless microphone radiating circuit comprises the audio input end connected successively, FM modulation module, power amplification circuit and transmitting antenna, also comprise MCU module, for regulating the frequency adjustment module of microphone rf frequency and for frequency-fixed signal being loaded into the PILOT modulation module in FM modulation module, described frequency adjustment is connected with MCU module, MCU module exports corresponding frequency information to PILOT modulation module according to frequency adjustment module, PILOT modulation module is loaded in FM modulation module by determining frequency information, described wireless microphone receiving circuit comprises the reception antenna connected successively, FM demodulation module, audio output, also comprise for by frequency-fixed signal demodulation PILOT demodulation module out, MCU module and for regulating the frequency regulation block of receive frequency, the output of described FM demodulation module is connected with the input of PILOT demodulation module, the output of PILOT demodulation module is connected with MCU module, the output of MCU module is connected with FM demodulation module by frequency regulation block.
2. the wireless microphone system based on frequency signal modulation technology according to claim 1, it is characterized in that: described MCU module is connected with the control end of FM modulation module, first during regulating frequency, audio signal and frequency-fixed signal are modulated in a default frequency by FM modulation module, after signal sends, MCU module control FM modulation module regulates its carrier frequency for regulated frequency.
3. the wireless microphone system based on frequency signal modulation technology according to claim 1, is characterized in that: described frequency adjustment module is the frequency adjustment button be arranged on microphone casing body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410778968.7A CN104486709A (en) | 2014-12-15 | 2014-12-15 | Wireless microphone system based on frequency signal modulating technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410778968.7A CN104486709A (en) | 2014-12-15 | 2014-12-15 | Wireless microphone system based on frequency signal modulating technology |
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| CN104486709A true CN104486709A (en) | 2015-04-01 |
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| CN201410778968.7A Pending CN104486709A (en) | 2014-12-15 | 2014-12-15 | Wireless microphone system based on frequency signal modulating technology |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104918187A (en) * | 2015-05-13 | 2015-09-16 | 深圳市好兄弟电子有限公司 | Wireless microphone system frequency matching method |
| CN105554598A (en) * | 2015-12-14 | 2016-05-04 | 恩平市亿歌电子有限公司 | Automatic frequency-matching multi-channel wireless microphone system and working method thereof |
| CN110224773A (en) * | 2019-05-07 | 2019-09-10 | 张德明 | A kind of FM tuning methods of vehicle-mounted K song system |
| CN111756665A (en) * | 2019-03-29 | 2020-10-09 | 比亚迪股份有限公司 | Method and device for automatically matching karaoke songs and vehicle |
| CN115361631A (en) * | 2022-07-28 | 2022-11-18 | 昆明理工大学 | Wireless microphone system and method thereof |
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| CN101142772A (en) * | 2005-04-05 | 2008-03-12 | 诺基亚公司 | Method and device for low-power fm transmission of audio data to rds capable fm radio receiver |
| US20080176524A1 (en) * | 2007-01-18 | 2008-07-24 | Circuit Design Inc. | FM transmitter device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104918187A (en) * | 2015-05-13 | 2015-09-16 | 深圳市好兄弟电子有限公司 | Wireless microphone system frequency matching method |
| CN104918187B (en) * | 2015-05-13 | 2017-02-22 | 深圳市好兄弟电子有限公司 | Wireless microphone system frequency matching method |
| CN105554598A (en) * | 2015-12-14 | 2016-05-04 | 恩平市亿歌电子有限公司 | Automatic frequency-matching multi-channel wireless microphone system and working method thereof |
| CN111756665A (en) * | 2019-03-29 | 2020-10-09 | 比亚迪股份有限公司 | Method and device for automatically matching karaoke songs and vehicle |
| CN111756665B (en) * | 2019-03-29 | 2022-03-18 | 比亚迪股份有限公司 | Method and device for automatically matching karaoke songs and vehicle |
| CN110224773A (en) * | 2019-05-07 | 2019-09-10 | 张德明 | A kind of FM tuning methods of vehicle-mounted K song system |
| CN115361631A (en) * | 2022-07-28 | 2022-11-18 | 昆明理工大学 | Wireless microphone system and method thereof |
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Application publication date: 20150401 |
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