CN205670824U - Frequency conversion wireless microphone structure - Google Patents
Frequency conversion wireless microphone structure Download PDFInfo
- Publication number
- CN205670824U CN205670824U CN201620552059.6U CN201620552059U CN205670824U CN 205670824 U CN205670824 U CN 205670824U CN 201620552059 U CN201620552059 U CN 201620552059U CN 205670824 U CN205670824 U CN 205670824U
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- chip microcomputer
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Abstract
The utility model discloses a kind of frequency conversion wireless microphone structure, this structure includes UHF transmitting terminal and UHF receiving terminal, and UHF receiving terminal is USB Dongle equipment, passes through wireless two-way communication between UHF transmitting terminal and UHF receiving terminal；UHF receiving terminal includes that housing, the USB plug being arranged on housing forward end and the receiving terminal single-chip microcomputer being placed in housing, UHF receive chip and usb audio chip, the communication ends of receiving terminal single-chip microcomputer is connected with UHF transmitting terminal wireless two-way, UHF receives chip and is provided with MUTE pin, UHF receives the MUTE pin of chip and is connected with the input of receiving terminal single-chip microcomputer, UHF receives chip and is connected alternately with receiving terminal single-chip microcomputer, and UHF receives the outfan of chip by usb audio chip connection USB plug.This utility model makes wireless microphone to avoid interference, and noise will not occur, and acoustical quality is good, and the granting work of mike is the most convenient.
Description
Technical field
This utility model relates to microphone techniques field, particularly relates to a kind of frequency conversion wireless microphone structure.
Background technology
In existing wireless microphone structure, transmitter and receiver frequency is fixing, or manually adjust.
The working frequency range of the wireless microphone owing to using at present, usually VHF wave band or UHF waveband, frequency is fixed, or is led to
Crossing manual mode and adjust frequency, we are the most fixed frequency wheat at this.Because VHF wave band or UHF waveband long distance of signal transmission
(spacious place may reach 5-30 rice) and ability through walls (can penetrate 2-4 wall) are stronger, if this fixed frequency wheat is one
The when that a little karaoke chambers using, allotment and the granting of mike are the most cumbersome, because if certain 2 room 2 is to mike
Frequency has overlap or difference too near, can cause string frequency interference, can produce a large amount of noise, even can allow the wireless microphone cannot be normal
Work.So before providing mike, it is ensured that the operating frequency of the mike in each room staggers as far as possible.Meanwhile, in nothing
During line wave transmissions, Intermodulation Interference can be produced, the new frequency recalled mutually, other mikes can be interfered again.Institute
With Intermodulation Interference to be avoided, the granting work of mike is bothered by this very much.
Utility model content
For weak point present in above-mentioned technology, this utility model provides a kind of frequency conversion wireless microphone structure, wheat
Gram wind in use will not produce string frequency interference and third order intermodulation is disturbed.
For achieving the above object, this utility model provides a kind of frequency conversion wireless microphone structure, including UHF transmitting terminal and
UHF receiving terminal, described UHF receiving terminal is USB Dongle equipment, by wireless between described UHF transmitting terminal and UHF receiving terminal
Two-way communication；Described UHF receiving terminal includes housing, the USB plug being arranged on housing forward end and the receiving terminal list being placed in housing
Sheet machine, UHF receive chip and usb audio chip, and the communication ends of described receiving terminal single-chip microcomputer is with UHF transmitting terminal wireless two-way even
Connecing, described UHF receives chip and is provided with MUTE pin, and described UHF receives the MUTE pin of chip and the defeated of receiving terminal single-chip microcomputer
Entering end to connect, described UHF receives chip and is connected alternately with receiving terminal single-chip microcomputer；Described UHF receives the outfan of chip and passes through USB
Audio chip connects USB plug, and USB plug can be inserted into Android TV or Android is play in box.
Wherein, described UHF transmitting terminal includes microphone body, the UHF that is placed in microphone body launches antenna, UHF sends out
Core shooting sheet and transmitting terminal single-chip microcomputer；Wireless two-way communication between described receiving terminal single-chip microcomputer and the communication ends of transmitting terminal single-chip microcomputer,
Described transmitting terminal single-chip microcomputer is connected alternately with UHF transmitting chip, and the outfan of described UHF transmitting chip launches antenna with UHF
Connect；After described receiving terminal single-chip microcomputer frequency sweep completes, this frequency between receiving terminal single-chip microcomputer and transmitting terminal single-chip microcomputer, is used to carry out
UHF communicates.
Wherein, described UHF receiving terminal also includes the receiving terminal 2.4G antenna being placed in housing, and described receiving terminal single-chip microcomputer sets
It is equipped with the 2.4G module being connected with receiving terminal 2.4G antenna；Described UHF transmitting terminal also includes the transmitting being placed in microphone body
End 2.4G antenna, described transmitting terminal single-chip microcomputer is provided with the 2.4G module being connected with transmitting terminal 2.4G antenna；Described receiving terminal
After 2.4G antenna is connected with transmitting terminal 2.4G antenna wireless, between receiving terminal single-chip microcomputer and transmitting terminal single-chip microcomputer, carry out wireless two-way
Communication.
Wherein, this UHF receiving terminal also includes the UHF reception antenna being placed in housing, and described UHF receives chip and connects with UHF
Receipts antenna connects；Described UHF receive between chip and receiving terminal single-chip microcomputer and between transmitting terminal single-chip microcomputer and UHF transmitting chip all
Connected alternately by I2C bus.
Wherein, described microphone body is provided with the power button of its power on/off of control.
The beneficial effects of the utility model are: compared with prior art, the frequency conversion wireless microphone that this utility model provides
Structure, by wireless two-way communication between UHF transmitting terminal and UHF receiving terminal, and UHF receiving terminal arrange UHF receive chip and
Receiving terminal single-chip microcomputer, after UHF receiving terminal receives the start of UHF transmitting terminal, receiving terminal single-chip microcomputer can be scanned ambient idle
Frequency, scan free time frequency after, this frequency of wireless transmission uses this to UHF transmitting terminal, UHF transmitting terminal and UHF receiving terminal
Frequency carries out UHF communication, is modulated on UHF frequency by the sound of mike simultaneously and launches.The improvement of said structure so that
The frequency that this microphone structure can be prevented effectively between multiple mike occurs that overlapping or difference too closely causes string frequency interference
Phenomenon so that wireless microphone can avoid interference, and noise will not occur, and acoustical quality is good, and the granting work of mike
The most convenient.
Accompanying drawing explanation
Fig. 1 is the structural representation of frequency conversion wireless microphone structure of the present utility model；
Fig. 2 is the internal work block diagram of UHF receiving terminal in this utility model；
Fig. 3 is the internal work block diagram of UHF transmitting terminal in this utility model.
Main element symbol description is as follows:
10, UHF transmitting terminal 11, UHF receiving terminal
12, Android plays box 101, microphone body
102, UHF launches antenna 103, UHF transmitting chip
104, transmitting terminal single-chip microcomputer 105, transmitting terminal 2.4G antenna
106, power button 107, miaow core
111, housing 112, USB plug
113, receiving terminal single-chip microcomputer 114, UHF receive chip
115, usb audio chip 116, receiving terminal 2.4G antenna
117, UHF reception antenna.
Detailed description of the invention
In order to more clearly state this utility model, below in conjunction with the accompanying drawings this utility model is further described.
Referring to Fig. 1-3, frequency conversion wireless microphone structure of the present utility model, including UHF transmitting terminal 10 and UHF receiving terminal
11, UHF receiving terminals 11 are USB Dongle equipment, pass through wireless two-way communication between UHF transmitting terminal 10 and UHF receiving terminal 11；
UHF receiving terminal 11 includes housing 111, the USB plug 112 being arranged on housing 111 front end and the receiving terminal list being placed in housing 111
Sheet machine 113, UHF receive chip 114 and usb audio chip 115, the communication ends of receiving terminal single-chip microcomputer 113 and UHF transmitting terminal 10 nothing
Line is bi-directionally connected, and UHF receives chip 114 and is provided with MUTE pin, and UHF receives MUTE pin and the receiving terminal monolithic of chip 114
The input of machine 113 connects, and UHF receives chip 114 and is connected alternately with receiving terminal single-chip microcomputer 113, and UHF receives chip 114
Outfan connects USB plug 112 by usb audio chip 115, and USB plug 112 can be inserted into Android TV or Android plays box
In；The audio signal to be modulated that miaow core 107 sends through receiving the process of chip 114 by receiving terminal single-chip microcomputer 113 and UHF
After, obtaining modulated audio signal, this audio signal is sent to USB plug 112, thus USB through usb audio chip 115
The signal that the Android TV of plug 112 connection or Android broadcasting box 12 obtain is modulated.It is provided with in microphone body 10
Control the power button 106 of its power on/off.
User presses the power button 106 of UHF transmitting terminal, sends start-up command and receive to UHF after UHF transmitting terminal 10 start
End 11, UHF receiving terminal 11 starts frequency sweep after receiving instruction；Receiving terminal single-chip microcomputer 113 reads the frequency index value remembered last time,
And look into frequency meter, by the frequency configuration found be UHF receive chip 114 currently receive frequency, and detect UHF and receive chip
The MUTE pin of 114；If be detected that MUTE pin is low level, then show that this frequency is occupied;Look into frequency meter again, then will look into
To frequency configuration be UHF receive chip reception frequency, then detect UHF receive chip 114 MUTE foot, the most repeatedly, directly
To detecting that UHF receives the level of MUTE foot of chip 114 and is output as height, then this frequency is unoccupied and be the frequency of free time,
Then this frequency sweep of receiving terminal single-chip microcomputer 113 completes；This free time frequency index value is sent to UHF transmitting terminal, by this free time frequency
Point index value is set as the transmitting frequency of UHF transmitting terminal, and the sound of mike is modulated on this free time frequency；And preserve this frequency
Index value, as the starting point of mike start next time frequency sweep.
Compared to the situation of prior art, the frequency conversion wireless microphone structure that this utility model provides, UHF transmitting terminal with
By wireless two-way communication between UHF receiving terminal, and UHF reception chip and receiving terminal single-chip microcomputer, UHF are set at UHF receiving terminal
After receiving terminal receives the start of UHF transmitting terminal, receiving terminal single-chip microcomputer can be scanned the frequency of ambient idle, scans the free time
Frequency after, this frequency of wireless transmission carries out UHF to UHF transmitting terminal, UHF transmitting terminal and UHF receiving terminal with this frequency and communicates, with
Time the sound of mike be modulated on UHF frequency launch.The improvement of said structure so that this microphone structure can have
Effect avoids the frequency between multiple mike to occur, and overlapping or difference too closely causes the phenomenon of string frequency interference so that wireless Mike
Wind energy enough avoids interference, and noise will not occur, and acoustical quality is good, and the granting work of mike is the most convenient.It addition, UHF connects
Receiving end is a USB Dongle equipment, is directly inserted in Android TV or Android is play on box, and mixes K song software, just can enter
Row the Internet K sings, and overturns traditional K and sings mode.
In the present embodiment, the UHF transmitting sky that UHF transmitting terminal 10 includes microphone body 101, is placed in microphone body
Line 102, UHF transmitting chip 103 and transmitting terminal single-chip microcomputer 140；Receiving terminal single-chip microcomputer 113 and the communication of transmitting terminal single-chip microcomputer 104
Wireless two-way communication between end, transmitting terminal single-chip microcomputer 104 is connected alternately with UHF transmitting chip 103, and UHF transmitting chip 103
Outfan is launched antenna 102 with UHF and is connected；After receiving terminal single-chip microcomputer 113 frequency sweep completes, receiving terminal single-chip microcomputer 113 and transmitting terminal
This frequency is used to carry out UHF communication between single-chip microcomputer 104；This frequency is sent to UHF transmitting chip by transmitting terminal single-chip microcomputer 104
Sound is modulated on this free time frequency by 103, UHF transmitting chips 103, and is launched by UHF transmitting antenna 102.UHF sends out
Penetrate the upper UHF of end and launch the design of antenna 102 so that mike can not only realize wireless wireless receiving, and it is strong to receive signal, connects
Receive and do not affected by distance.
In the present embodiment, UHF receiving terminal 11 also includes the receiving terminal 2.4G antenna 116 being placed in housing 111, receiving terminal list
The 2.4G module being connected with receiving terminal 2.4G antenna 116 it is provided with on sheet machine 113；UHF transmitting terminal 10 also includes being placed in mike
Transmitting terminal 2.4G antenna 105 in body 101, transmitting terminal single-chip microcomputer 104 is provided with and is connected with transmitting terminal 2.4G antenna 105
2.4G module；After receiving terminal 2.4G antenna 116 and transmitting terminal 2.4G antenna 105 wireless connections, receiving terminal single-chip microcomputer 113 and transmitting
Wireless two-way communication is carried out between end single-chip microcomputer 104.This UHF receiving terminal 11 also includes the UHF reception antenna being placed in housing 111
117, UHF receive chip 114 is connected with UHF reception antenna 117；UHF receive between chip 114 and receiving terminal single-chip microcomputer 113 and
All it is connected alternately by I2C bus between transmitting terminal single-chip microcomputer 104 with UHF transmitting chip 103.
Intermodulation Interference, refers to when two or more interference signals are concurrently applied to receiver, due to nonlinear effect, this
The combination frequency of two interference is exactly equal to sometimes or passes through receiver close to useful signal frequency, and wherein three rank are mutual
Adjust the most serious.
Third order intermodulation refers to, when two signals are in a linear structure, make a signal owing to non-linear factor exists
Second harmonic and the first-harmonic of another signal produce beat (mixing) produced parasitic signal afterwards.The second harmonic of such as F1 is
2F1, he creates parasitic signal 2F1-F2 with F2.Owing to a signal is second harmonic (second order signal), another signal is
Fundamental signal (first order signal), they two synthesize three rank signals, and wherein 2F1-F2 is referred to as third order intermodulation signal, and it is to adjust
Produce during system.Beat Signal is produced again because of being the phase inter-modulation of the two signal, so this newly generated letter
It is known as third order intermodulation distortion signal.The process producing this signal is referred to as third order intermodulation distortion.Connect owing to F2, F1 signal compares
Closely, also result in 2F1-F2,2F2-F1 and can interfere with original baseband signal F1, F2.Here it is third order intermodulation interference.Since can go out
, the most also there is the intermodulation of high-order on existing three rank, in fact because the intermodulation exponent number more high signal intensity produced is the most weak, so three rank are mutual
Tune is main interference.
In the present embodiment, frequency meter is located in the ROM form of receiving terminal single-chip microcomputer, looks into frequency meter and make during for frequency conversion
With.Frequency in frequency meter uses third order intermodulation principle to obtain, and therefore frequency will not produce third order intermodulation interference between any two.
Such as 701MHz-780MHz interval has 80 frequencies altogether, it is assumed that be an effective frequency at interval of 1MHz, then these frequency numbers
According to for 701MHz, 702MHz, 703MHz, 704 ... 780MHz.According to above third order intermodulation principle, this instrument can calculate this 80
In individual frequency, the third order intermodulation frequency of intermodulation two-by-two, such as can calculate the third order intermodulation frequency of 701MHz and 702MHz,
This frequency of 2X701-702=700MHz, 700MHz is not interval at 701MHZ-780MHz, it is not necessary to process；Another third order intermodulation
Frequency, 2X702-701=703MHz, this frequency is in the frequency meter of input, so this frequency to be rejected from frequency meter.With
Reason, by same method, can calculate third order intermodulation frequency produced by 701MHZ and 703MHZ the two frequency, for 699MHZ
With 705MHZ, 705MHZ are in incoming frequency table, so to be rejected.The like, can calculate in 80 frequencies, reject
Removing third order intermodulation frequency two-by-two, last remaining frequency is: 702,704,705,710,711,713,714,728,729,
731,732,737,738,740,741, unit is MHz.Come to 15 frequencies, if dual microphone, just take even number, i.e. before
14 frequencies.These 14 frequencies are exactly the frequency that will not produce third order intermodulation interference between any two, using these frequencies as constant
Form is placed in the ROM form of single-chip microcomputer, looks into frequency meter when of for frequency conversion.
This utility model can could support up 12 pairs of wheats (or 24 wheats) and work simultaneously, will not produce in a limited space
Raw string frequency interference and third order intermodulation are disturbed.This structure is without being manually set both sides' frequency.Use the completeest in karaoke chamber or family
Entirely enough reach demand, will not the puzzlement of cause the user frequency crosstalk.UHF receiving terminal uses USB Dongle equipment, standard
USB Audio equipment, plug and play, free drive move, support WINDOWS structure, Android structure, Linux structure.
UHF typically refers to superfrequency radio wave, Ultra High Frequency (UHF) refer to frequency be 300 ~
3000MHz, wavelength is in the radio wave of 1m-1dm.The radio wave of this wave band is also called decimetric wave.
Only several specific embodiments of the present utility model disclosed above, but this utility model is not limited to this,
The changes that any person skilled in the art can think of all should fall into protection domain of the present utility model.
Claims (5)
1. a frequency conversion wireless microphone structure, it is characterised in that include UHF transmitting terminal and UHF receiving terminal, described UHF receives
End is USB Dongle equipment, passes through wireless two-way communication between described UHF transmitting terminal and UHF receiving terminal；Described UHF receiving terminal
The USB plug including housing, being arranged on housing forward end and the receiving terminal single-chip microcomputer being placed in housing, UHF receive chip and USB sound
Frequently chip, the communication ends of described receiving terminal single-chip microcomputer is connected with UHF transmitting terminal wireless two-way, and described UHF receives chip and is provided with
MUTE pin, described UHF receives the MUTE pin of chip and is connected with the input of receiving terminal single-chip microcomputer, and described UHF receives chip
It is connected alternately with receiving terminal single-chip microcomputer；Described UHF receives the outfan of chip and connects USB plug by usb audio chip, and
USB plug can be inserted into Android TV or Android is play in box.
Frequency conversion wireless microphone structure the most according to claim 1, it is characterised in that described UHF transmitting terminal includes Mike
Wind body, the UHF being placed in microphone body launch antenna, UHF transmitting chip and transmitting terminal single-chip microcomputer；Described receiving terminal monolithic
Wireless two-way communication between the communication ends of machine and transmitting terminal single-chip microcomputer, described transmitting terminal single-chip microcomputer connects alternately with UHF transmitting chip
Connect, and the outfan of described UHF transmitting chip is launched antenna with UHF and is connected；After described receiving terminal single-chip microcomputer frequency sweep completes, receive
This frequency is used to carry out UHF communication between end single-chip microcomputer and transmitting terminal single-chip microcomputer.
Frequency conversion wireless microphone structure the most according to claim 2, it is characterised in that described UHF receiving terminal also includes putting
In the receiving terminal 2.4G antenna of housing, described receiving terminal single-chip microcomputer is provided with the 2.4G mould being connected with receiving terminal 2.4G antenna
Block；Described UHF transmitting terminal also includes the transmitting terminal 2.4G antenna being placed in microphone body, and described transmitting terminal single-chip microcomputer is arranged
There is the 2.4G module being connected with transmitting terminal 2.4G antenna；Described receiving terminal 2.4G antenna is connected with transmitting terminal 2.4G antenna wireless
After, carry out wireless two-way communication between receiving terminal single-chip microcomputer and transmitting terminal single-chip microcomputer.
Frequency conversion wireless microphone structure the most according to claim 2, it is characterised in that this UHF receiving terminal also includes being placed in
UHF reception antenna in housing, described UHF receives chip and is connected with UHF reception antenna；Described UHF receives chip and receiving terminal
All it is connected alternately by I2C bus between single-chip microcomputer and between transmitting terminal single-chip microcomputer with UHF transmitting chip.
Frequency conversion wireless microphone structure the most according to claim 2, it is characterised in that be provided with in described microphone body
Control the power button of its power on/off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620552059.6U CN205670824U (en) | 2016-06-11 | 2016-06-11 | Frequency conversion wireless microphone structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620552059.6U CN205670824U (en) | 2016-06-11 | 2016-06-11 | Frequency conversion wireless microphone structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205670824U true CN205670824U (en) | 2016-11-02 |
Family
ID=57191691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620552059.6U Active CN205670824U (en) | 2016-06-11 | 2016-06-11 | Frequency conversion wireless microphone structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205670824U (en) |
-
2016
- 2016-06-11 CN CN201620552059.6U patent/CN205670824U/en active Active
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |