CN206658221U - A kind of wireless system of ringing a bell based on FM SCA - Google Patents
A kind of wireless system of ringing a bell based on FM SCA Download PDFInfo
- Publication number
- CN206658221U CN206658221U CN201720414250.9U CN201720414250U CN206658221U CN 206658221 U CN206658221 U CN 206658221U CN 201720414250 U CN201720414250 U CN 201720414250U CN 206658221 U CN206658221 U CN 206658221U
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- sca
- signal
- ringing
- bell
- connection
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Abstract
The utility model discloses a kind of wireless system of ringing a bell based on FM SCA, including being provided with the frequency modulation broadcast emission system of SCA modulators and with frequency modulation broadcast emission system wireless connection and being provided with the FM SCA of SCA demodulators and wirelessly ringing a bell receiver, described frequency modulation broadcast emission system includes the sending control system communicated to connect successively according to signal transmission direction, ASK modulators, communication is connected with the Signal averaging device of SCA modulators, communication is connected with the FM modulators and sender unit of main carrier signal generator, described reception control system includes communicating the digital signal reception serial ports of the connection of the reshaper compared with of connection successively according to signal transmission direction, data signal detachment device and the control command resolver being connected with control device of ringing a bell.The beneficial effects of the utility model are：Utility model can reach the purpose that remote wireless control rings a bell using existing resource, and the utility model has the advantages that wide coverage, control accuracy are high, error is small, additionally it is possible to saves construction cost.
Description
Technical field
Campus the tinkle of bells control field is the utility model is related to, is that a kind of wireless ring a bell based on FM-SCA is specifically
System.
Background technology
Wireless data transfer module typically operates in 433MHz and 2.4GHz two ISM bands at present.2.4GHz frequency range
Transmission rate is high, but penetrability is bad, is easily hindered.433MHz band characteristic is just the opposite.Need to cross over multiple buildings, and
Communicated in interior of building, it is contemplated that 433MHz frequency range is current main-stream way.Because 433MHZ frequencies are higher, accordingly
Transmission range it is lower than frequency signal transmission distance it is near.Because transmission loss is directly proportional to frequency, i.e. the higher biography of frequency
Defeated loss is bigger；In other words in the case of same transmission loss, transmission range is inversely proportional with frequency, i.e., frequency is higher, transmission distance
From shorter.Loss calculation formula when wireless signal transmits in atmosphere：
Los=32.44+20lgd+20lgf
Los is transmission loss, unit dB
D is distance, and unit is Km
F is working frequency, and unit is MHz
So in order to improve the transmission range of wireless signal, the frequency of signal is only reduced.But according to National Radio pipe
The regulation of reason, the frequency of different frequency range are to use according to regulations, and must not arbitrarily be used.
Utility model content
The purpose of this utility model is to provide a kind of wireless system of ringing a bell based on FM-SCA, and the system is in current frequency modulation
The frequency band of broadcast is added wireless digital signal and is transmitted to realize the purpose rung a bell using wireless digital signal remote control.
The utility model is achieved through the following technical solutions：A kind of wireless system of ringing a bell based on FM-SCA, including set
There is the frequency modulation broadcast emission system of SCA modulators and with frequency modulation broadcast emission system wireless connection and being provided with SCA demodulators
FM-SCA wirelessly ring a bell receiver.
Described frequency modulation broadcast emission system include communicated to connect successively according to signal transmission direction sending control system,
SCA modulators, communication are connected with the Signal averaging device of audio modulation signal input unit, communication is connected with main carrier signal
The FM modulators and sender unit of device.
Described SCA modulators include the ASK modulators that communication link is connected to subcarrier signal generator；Described ASK is adjusted
Compressor reducer is connected between device and Signal averaging device processed.
Power amplifier is connected between described FM modulators and sender unit.
Described sending control system includes communicating the control command dispensing device of connection, data signal combination unit successively
Serial ports is sent with the data signal with the communication connection of ASK modulators；When described data signal combination unit communication is connected with GPS
Between reception device.
Described FM-SCA wirelessly rings a bell receiver including communicating being sent out with signal for connection successively according to signal transmission direction
Send device connection signal receiver, FM demodulator, SCA demodulators, receive control system and control device of ringing a bell.
Described SCA demodulators include communicating the band logical being connected with FM demodulator of connection successively according to signal transmission direction
Wave filter, rectifier, low pass filter, limiter and compare reshaper.
Described reception control system includes communicating the connection of the reshaper compared with of connection successively according to signal transmission direction
Digital signal reception serial ports, data signal detachment device and the control command resolver being connected with control device of ringing a bell；Institute
The control command resolver stated is connected with time display apparatus.
Also include the audio signal bandpass filtering being connected with FM demodulator for communicating connection successively according to signal transmission direction
Device, audio-frequency amplifier and the audio control apparatus being connected with control command resolver.
Tuned amplifier is connected between described signal receiver and FM demodulator.
The utility model compared with prior art, has advantages below and beneficial effect：
（1）The utility model can reach the purpose that remote wireless control rings a bell using existing resource, and this practicality is new
Type has the advantages that wide coverage, control accuracy are high, error is small, additionally it is possible to saves construction cost；
（2）The utility model uses compressor reducer, and the signal that can export ASK modulators is compressed, to avoid SCA from adjusting
The signal interference that the signal of device output processed is exported by ASK modulators, so as to improve the accuracy and stability of signal transmission.
Brief description of the drawings
Fig. 1 is the schematic diagram of frequency modulation broadcast emission system；
Fig. 2 is that FM-SCA wirelessly rings a bell the schematic diagram of receiver.
Embodiment
The utility model is described in further detail with reference to embodiment, but embodiment of the present utility model is not
It is limited to this.
Embodiment 1：
In the present embodiment, a kind of wireless system of ringing a bell based on FM-SCA, including it is provided with the frequency modulation broadcasting of SCA modulators
Emission system and with frequency modulation broadcast emission system wireless connection and being provided with the FM-SCA of SCA demodulators and wirelessly ringing a bell reception
Device.As shown in figure 1, the transmission that described frequency modulation broadcast emission system includes communicating to connect successively according to signal transmission direction controls
System, SCA modulators, communication is connected with the Signal averaging device of audio modulation signal input unit, communication is connected with main carrier letter
The FM modulators and sender unit of number generator, wherein sending control system use MSP430F449 single-chip microcomputers, FM modulators
Using SN761633 FM modulators.Described SCA modulators include the ASK modulation that communication link is connected to subcarrier signal generator
Device, ASK modulators are connected between sending control system and Signal averaging device, and described ASK modulators use and are based on CD4046
The ASK modulators of integrated circuit.Described Signal averaging device uses modulates audio signals device.Described sending control system includes
The control command dispensing device, data signal combination unit and the numeral letter with the communication connection of ASK modulators of connection are communicated successively
Number send serial ports.
As shown in Fig. 2 described FM-SCA wirelessly rings a bell, receiver includes communicating connection successively according to signal transmission direction
Signal receiver, FM demodulator are connected with sender unit, SCA demodulators, receives control system and control device of ringing a bell.Institute
The FM demodulator stated uses the FM demodulator based on MC3361 monolithic narrow-band FM receiving circuits, and control device of ringing a bell uses base
In SSR-10DA relays, control device of ringing a bell is connected with electric bell.Described reception control system uses MSP430F449 monolithics
Machine.Tuned amplifier is connected between described signal receiver and FM demodulator.Described reception control system include according to
Signal transmission direction communicates the digital signal reception serial ports of the connection of the reshaper compared with of connection, data signal detachment device successively
The control command resolver being connected with control device of ringing a bell.Described SCA demodulators include according to signal transmission direction according to
It is secondary communication connection with FM demodulator connection bandpass filter, rectifier, low pass filter, limiter and compared with reshaper.
The data in work and rest timetable of ringing a bell are read by sending control system compared with current time, it is equal then full
Foot is rung a bell condition, and sending control system sends the information rung a bell, and information after SCA modulators modulates by being changed into 67kHz frequency modulation
Signal, signal are sent in Signal averaging device again, with audio modulation signal input unit caused by stereo composite signal be added,
The signal of superposition carries out second of frequency modulation after FM modulators to main carrier fo, then launches through sender unit.
Signal receiver receives the signal of sender unit transmitting, carries out first time demodulation by FM demodulator, then pass through
Cross SCA demodulators and carry out second of demodulation.The index of modulation of demodulation determines reception signal output amplitude for the first time, and solves for the second time
The index of modulation of tune then determines the noise of reception signal.Read what is received after demodulating twice, then by reception control system
Ring a bell signal, then order, control electric bell work are sent to control device of ringing a bell.By by FM stereophonic signals with wirelessly ringing a bell
Data signal mixed transport, it is more farther than the distance that 433MHz signal is wirelessly transferred under identical transmission power.Simultaneously being capable of profit
With existing FM power amplifier and transmitting antenna, play a part of saving construction cost.It is same to enter also realize radio broadcasting
System.
Embodiment 2：
On the basis of above-described embodiment, in the present embodiment, when the combination unit communication of described data signal is connected with GPS
Between reception device, described gps time reception device uses GR87 modules.The effect of gps time receiving module allows main frame
Time is synchronous with Beijing time, prevents the unstability of local clock crystal oscillator from bringing the error of timing, therefore receive mould with gps time
Block can accurate timing, avoid the time difference, improve the precision of control.In the present embodiment, other parts not described with above-mentioned reality
The content for applying example is identical.
Embodiment 3：
On the basis of above-described embodiment, in the present embodiment, it is connected between described ASK modulators and Signal averaging device
Compressor reducer.20% is compressed to the 67kHz FM signals by being obtained after SCA modulators modulates by using compressor reducer, energy
It is enough avoided to produce interference to stereo composite signal caused by audio modulation signal input unit, so as to improve signal transmission
Stability and accuracy.In the present embodiment, other parts not described are identical with the content of above-described embodiment.
Embodiment 4：
On the basis of above-described embodiment, in the present embodiment, it is connected between described FM modulators and sender unit
Power amplifier.By setting power amplifier to improve the distance that signal transmits, and the requirement to antenna size is reduced, with
This is advantageously implemented remote control and saves production cost.In the present embodiment, other parts not described are and above-described embodiment
Content it is identical.
Embodiment 5：
On the basis of above-described embodiment, in the present embodiment, FM-SCA wirelessly rings a bell receiver also including being passed according to signal
Defeated direction communicates the audio signal bandpass filter being connected with FM demodulator, audio-frequency amplifier and and the control command of connection successively
The audio control apparatus of resolver connection.Broadcast energy supply can be realized with this.
It is described above, only it is preferred embodiment of the present utility model, any formal limit is not done to the utility model
System, every any simple modification made according to the technical essence of the utility model to above example, equivalent variations, each falls within
Within the scope of protection of the utility model.
Claims (10)
- A kind of 1. wireless system of ringing a bell based on FM-SCA, it is characterised in that：Frequency modulation broadcasting including being provided with SCA modulators is sent out Penetrate system and with frequency modulation broadcast emission system wireless connection and being provided with the FM-SCA of SCA demodulators and wirelessly ringing a bell receiver.
- A kind of 2. wireless system of ringing a bell based on FM-SCA according to claim 1, it is characterised in that：Described frequency modulation is wide Sending control system, SCA modulator, communication of the emission system including communicating to connect successively according to signal transmission direction is broadcast to be connected with The Signal averaging device of audio modulation signal input unit, communication are connected with the FM modulators and signal hair of main carrier signal generator Send device.
- A kind of 3. wireless system of ringing a bell based on FM-SCA according to claim 2, it is characterised in that：Described SCA is adjusted Device processed includes the ASK modulators that communication link is connected to subcarrier signal generator；Between described ASK modulators and Signal averaging device It is connected with compressor reducer.
- A kind of 4. wireless system of ringing a bell based on FM-SCA according to claim 2, it is characterised in that：Described FM modulation Power amplifier is connected between device and sender unit.
- A kind of 5. wireless system of ringing a bell based on FM-SCA according to any one of claim 2,3,4, it is characterised in that： Described sending control system includes communicating the control command dispensing device of connection, data signal combination unit and and ASK successively The data signal of modulator communication connection sends serial ports；Described data signal combination unit communication is connected with gps time reception Device.
- 6. a kind of wireless system of ringing a bell based on FM-SCA according to any one of claim 1,2,3,4, its feature exist In：Described FM-SCA wirelessly rings a bell receiver including communicating connecting with sender unit for connection successively according to signal transmission direction Connect signal receiver, FM demodulator, SCA demodulators, receive control system and control device of ringing a bell.
- A kind of 7. wireless system of ringing a bell based on FM-SCA according to claim 6, it is characterised in that：Described SCA solutions Device is adjusted to include the bandpass filter being connected with FM demodulator, rectifier, low pass for communicating connection successively according to signal transmission direction Wave filter, limiter and compare reshaper.
- A kind of 8. wireless system of ringing a bell based on FM-SCA according to claim 7, it is characterised in that：Described reception control System processed includes communicating digital signal reception serial ports, the number of the connection of the reshaper compared with of connection successively according to signal transmission direction Word signal detachment device and the control command resolver being connected with control device of ringing a bell；Described control command resolver connects It is connected to time display apparatus.
- A kind of 9. wireless system of ringing a bell based on FM-SCA according to claim 8, it is characterised in that：Also include according to letter Number transmission direction communicate successively the audio signal bandpass filter being connected with FM demodulator of connection, audio-frequency amplifier and with control The audio control apparatus of command analysis device connection.
- 10. a kind of wireless system of ringing a bell based on FM-SCA according to any one of claim 7,8,9, its feature exist In：Tuned amplifier is connected between described signal receiver and FM demodulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720414250.9U CN206658221U (en) | 2017-04-19 | 2017-04-19 | A kind of wireless system of ringing a bell based on FM SCA |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720414250.9U CN206658221U (en) | 2017-04-19 | 2017-04-19 | A kind of wireless system of ringing a bell based on FM SCA |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206658221U true CN206658221U (en) | 2017-11-21 |
Family
ID=60318332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720414250.9U Expired - Fee Related CN206658221U (en) | 2017-04-19 | 2017-04-19 | A kind of wireless system of ringing a bell based on FM SCA |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206658221U (en) |
-
2017
- 2017-04-19 CN CN201720414250.9U patent/CN206658221U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171121 Termination date: 20210419 |
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| CF01 | Termination of patent right due to non-payment of annual fee |