CN109818673A - A signal transmitting module circuit of visible light communication wireless broadcasting system - Google Patents
A signal transmitting module circuit of visible light communication wireless broadcasting system Download PDFInfo
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- CN109818673A CN109818673A CN201910225980.8A CN201910225980A CN109818673A CN 109818673 A CN109818673 A CN 109818673A CN 201910225980 A CN201910225980 A CN 201910225980A CN 109818673 A CN109818673 A CN 109818673A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
本发明涉及可见光通信无线广播系统信号发射模块电路，包括：信号匹配电路、Delta‑Sigma调制电路及LED灯板电路；其中信号匹配电路包括：语音信号接口、阻抗匹配及直流隔离、信号放大三个部分；R3与JS‑Signal并联，R3一端接地；电容C1一端与R3和JS‑Signal相连接，C1的另一端接R1的一端，R1的另一端接N1的2脚，同时2脚还与R2的一端相连，R2的另一端接N1的6脚；另外N1的3脚接R4的一端，R4的另一端接地。本发明的有益效果是：使日常LED照明与生活中的广播系统结合在一起，并具有较高的信噪比与灵敏度；这样可以有效缓解当前社会的频谱压力，并使广播系统具有较高的稳定性。除此之外，LED的功耗低，节能环保。
The invention relates to a signal transmitting module circuit of a visible light communication wireless broadcasting system, comprising: a signal matching circuit, a Delta-Sigma modulation circuit and an LED lamp board circuit; wherein the signal matching circuit includes three parts: a voice signal interface, impedance matching and DC isolation, and signal amplification part; R3 is connected in parallel with JS‑Signal, one end of R3 is grounded; one end of capacitor C1 is connected with R3 and JS‑Signal, the other end of C1 is connected with one end of R1, the other end of R1 is connected with pin 2 of N1, and pin 2 is also connected with R2 One end of R2 is connected to one end of R2, the other end of R2 is connected to pin 6 of N1; the other end of pin 3 of N1 is connected to one end of R4, and the other end of R4 is grounded. The beneficial effects of the invention are as follows: the daily LED lighting is combined with the broadcasting system in life, and has higher signal-to-noise ratio and sensitivity; in this way, the spectrum pressure of the current society can be effectively relieved, and the broadcasting system has a higher performance. stability. In addition, LED has low power consumption, energy saving and environmental protection.
Description
Technical field
The present invention relates to optical communication fields, and more specifically, it is related to a kind of novel visible communication system receiving module.Tool
Body is related to Audio Signal Processing, Delta-Sigma modulation technique, LED driving.
Background technique
Current visible light communication is not popularized, it is seen that and optic communication wireless broadcast system signal emission module product is less, and one
As be used for experimental study, in order to which system building is convenient, generally use PWM modulation, but the signal-to-noise ratio of this modulation system and sensitive
It spends lower.Although experiment is more convenient, it is unfavorable for the subsequent popularization and application, multipath effect and noise problem of experimental products
It is difficult to be received by market.In addition to this, current wireless broadcast system poor anti jamming capability, vulnerable to other signal interferences, and
It needs to seize frequency spectrum resource with other wireless devices.This visible light communication wireless broadcast system has strong antijamming capability, noise
Than high, the characteristics of being not take up radio spectrum resources, have a extensive future, practical value is higher.
Summary of the invention
It is an object of the invention to overcome the shortcomings of conventional wireless broadcast system, provide a kind of cost relatively reasonable visible
Optic communication wireless broadcast system signal emission module circuit.
Visible light communication wireless broadcast system signal emission module circuit includes: Signal Matching circuit, Delta-Sigma tune
Circuit processed and LED lamp panel circuit；Wherein Signal Matching circuit includes: voice signal interface, impedance matching and DC isolation, signal
Amplify three parts；R3 is in parallel with JS-Signal, the one end R3 ground connection；The one end capacitor C1 is connected with R3 and JS-Signal, C1
Another termination R1 one end, 2 feet of another termination N1 of R1, while 2 feet are also connected with one end of R2, another termination N1 of R2
6 feet；In addition 3 feet of N1 connect one end of R4, the other end ground connection of R4.
As preferred: the Delta-Sigma modulation circuit includes integrator, comparator, level shifting circuit and 1Bit
DAC；
Integrator are as follows: 6 feet of N1 connect one end of R5, and 2 feet of another termination N2 of R5,2 feet of N2 connect C2's at the same time
One end, 6 feet of another termination N2 of C2；4 feet and 7 feet of N2 are grounded through capacitor C3, C4 respectively；The feed circuit of integrator is R6
One termination N2 2 feet, one end of another termination C5 of R6, C5 the other end ground connection；The ungrounded end of a termination C5 of R7, R7
Another termination U1 4 feet, be used for deglitch pulse；
Comparator are as follows: 6 feet of N2 connect one end of R8,9 feet of another termination N3B of R8, the 10 feet ground connection of N3B；It is same with this
When, 7 feet of N3B connect one end of R9, and another termination+9V of R9, R9 is pull-up resistor；Start-up circuit is that 4 feet of N3A meet R10
One end, one end of another termination R11 of R10, and the junction of R10 and R11 meets+9V；5 feet of another termination N3A of R11；
One end of the 5 feet connection R12 of R3A, one end of another termination C6 of R12, and the junction ground connection of R12 and C6 at the same time；
4 feet of another termination N3A of C6；A reset button RST1 is bridged at the both ends of C6；In addition to this, 12 feet of N3A connect N3B's
7 feet；
Level shifting circuit are as follows: the base stage of Q1 and Q2 connects together, and is attempted by 7 feet of N3B；The transmitting of Q1 emitter and Q2
Pole connection is attempted by the grid of Q3；The collector of Q1 meets+9V, and the collector of Q2 meets -9V；The source electrode of Q3 meets+9V, and drain electrode connects
One end of R13, one end of another termination R14 of R13, another termination -25V of R14；
1Bit DAC: being realized the split-phase of 1Bit signal stream by U2, is formed two-way complementary drive signals, is realized half-bridge circuit
Upper lower switch controls respectively；1,3,5 feet of U2 connect the junction of R13 and R14, while connecing the anode of D1；The cathode of D1 meets -25V+
5V；2,4,6 feet of U2 connect, and connect simultaneously with 9,11,13 feet of U2 again after connection；8,10,12 feet of U2 connect 6 feet of U1；
Half-bridge circuit in 1Bit DAC: U1 is half-bridge drive circuit, and the amplification for realizing 1Bit signal is cooperated with Q4, Q5；5 feet of U1 connect
1 foot of 13 feet of U2, U1 connects power supply and connects the anode of D2 simultaneously, and the cathode of D2 connects 2 feet of U1,2 feet of U1 again with one end of C6
It is connected, the other end of C6 is connected with 4 feet of U1；3 feet of U1 connect one end of R15, one end of another termination R16 of R15, R16's
4 feet of another termination U1；The cathode of D3 connects 3 feet of U1 simultaneously, and the anode of D3 connects the junction of R15 and R16；The grid of Q4 meets D3
Anode, the drain electrode of Q4 meets+25V, and the source level of Q4 connects 4 feet of U1；8 feet of U1 connect one end of R17, another termination R18's of R17
One end, 7 feet of another termination U1 of R18 and meets -25V；The cathode of D4 connects 8 feet of U1, and the anode of D4 meets the company of R17 and R18
Place is met, the grid of Q5 connects the anode of D4, and the drain electrode of Q5 connects 4 feet of U1, and the source level of Q5 connects 7 feet of U1.
As preferred: the LED lamp panel circuit includes: that multiple white light LEDs and current-limiting resistance RL1 are formed, rectangular distribution,
Every row is connected by N number of LED and is formed, then is formed by N row parallel connection；J1, which is accessed, by modulated signal drives LED operation.
The beneficial effects of the present invention are: make daily LED illumination and life in broadcast system be combined together, and have compared with
High signal-to-noise ratio and sensitivity.The frequency spectrum pressure of current social can be effectively relieved in this way, and keep broadcast system with higher
Stability.In addition to this, LED's low in energy consumption, energy conservation and environmental protection.
Detailed description of the invention
Fig. 1 is the voice signal match circuit figure of the invention patent；
Fig. 2 is the Delta-Sigma modulation circuit figure of the invention patent；
Fig. 3 is the white light LEDs lamp plate circuit of the invention patent.
Specific embodiment
The present invention is described further below with reference to embodiment.The explanation of following embodiments is merely used to help understand this
Invention.It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, also
Can be with several improvements and modifications are made to the present invention, these improvement and modification also fall into the protection scope of the claims in the present invention
It is interior.
A kind of visible light communication wireless broadcast system transmitting module that cost is relatively reasonable is provided, realizes that voice signal enters
Signal Matching circuit increases input impedance, realizes impedance matching.Appropriate amplitude is amplified to voice signal adjusting simultaneously.By
Delta-Sigma modulation, including enter integrator, comparator, level shifting circuit, 1Bit DAC.Finally with modulated mould
Quasi- signal driving white light LEDs work, makes comprising voice signal information in the sightless flicker frequency of its naked eyes, by illumination and signal
Propagation is combined together.
This Novel photo-communication wireless broadcast system transmitting module, comprising: Signal Matching circuit, the Signal Matching circuit
It plays and voice signal is accessed into circuit, realize impedance matching, and the effect that signal is amplified；And Delta-Sigma modulation electricity
Road, the modulation circuit realizes the modulation of voice signal and the power amplification of signal, to drive LED circuit, wherein modulation circuit
By integrator, comparator, start-up circuit, level translation circuit, 1Bit DAC composition；And LED lamp panel circuit, modulation circuit it
Signal afterwards drives LED circuit by current-limiting resistance, realizes illumination and the propagation of signal.
The Signal Matching circuit is an inverting amplifier realized with LT1220.
Integrator in the Delta-Sigma modulation circuit is by LT1220 and feedback loop R5-R6, C5 composition.
Comparator in the Delta-Sigma modulation circuit is zero-crossing comparator.
Start-up circuit in the Delta-Sigma modulation circuit is reset circuit, by LM319 and resistance capacitance and again
Position button composition.
Level translation circuit in the Delta-Sigma modulation circuit is made of Q1-Q3, R13-R14.
1Bit DAC in the Delta-Sigma modulation circuit is the split-phase that 1Bit signal stream is realized by U2, is formed
Two-way complementary drive signals realize that the upper lower switch of half-bridge circuit controls respectively；It is half-bridge drive circuit by U1, with Q4, Q5
The amplification of 1Bit signal is realized in cooperation.
The LED lamp panel circuit has 16 and 1 current-limiting resistance of white light-emitting diodes.
By start-up circuit, pressing RST1 makes entire module resets, realizes that N3A starting moment is defeated using slow rise of capacitance voltage
Low level out realizes that Q5 takes the lead in being connected.So that voice signal is accessed JS-Signal, by Signal Matching circuit, realizes impedance matching
Amplify with signal, then hence into integrator, comparator exports the square wave of positive negative level, using level translation circuit, finally
By 1Bit DAC.Prime is adjusted the audio that circuit has pre-processed by audio by filtering interpolation and believed by Delta-Sigma modulation
Number become the high-accuracy digital signal of high sampling rate, the high of low precision is then modulated by Sigma-Delta modulator and is sampled
Then the digital signal of rate is converted into analog signal by switching circuit DAC, to drive LED operation.
As shown in Figure 1, voice signal match circuit, voice signal meets JS-Signal, and JS-Signal is connected in parallel on the both ends R3；
The one end R3 ground connection, one end of another termination C1, one end of another termination R1 of C1,2 feet of another termination N1 of R1, while 2 feet
Also it is connected with one end of R2,6 feet of another termination N1 of R2；In addition 3 feet of N1 connect one end of R4, the other end ground connection of R4.This
Circuit is typical see-saw circuit.It realizes impedance matching, and signal is amplified.
As shown in Fig. 2, Delta-Sigma modulation module is by integrator, comparator, level shifting circuit, 1Bit DAC group
At.The principle of integrating circuit is that 6 feet of N1 connect one end of R5, and 2 feet of another termination N2 of R5,2 feet of N2 meet C2 at the same time
One end, 6 feet of another termination N2 of C2；In addition to this, 4 feet of N2 and 7 feet are grounded through capacitor C3, C4 respectively.Integrator
2 feet for the termination N2 that feed circuit is R6, one end of another termination C5 of R6, the other end ground connection of C5.A termination C5 of R7
Ungrounded end, 4 feet of another termination U1 of R7, be used for deglitch pulse.The principle of comparator in Delta-Sigma module
One end of R8,9 feet of another termination N3B of R8, the 10 feet ground connection of N3B are connect for 6 feet of N2；At the same time, 7 feet of N3B meet R9
One end, another termination+9V of R9, R9 is pull-up resistor.Start-up circuit is that 4 feet of N3A connect one end of R10, the other end of R10
One end of R11 is connect, and the junction of R10 and R11 meets+9V；5 feet of another termination N3A of R11；5 feet of R3A at the same time
Connect the junction ground connection of one end of R12, one end of another termination C6 of R12, and R12 and C6；Another termination N3A's of C6
4 feet；A reset button RST1 is bridged at the both ends of C6.In addition to this, 12 feet of N3A connect 7 feet of N3B.In addition to this,
The principle of level translation circuit in Delta-Sigma module is that the base stage of Q1 and Q2 connects together, and is attempted by 7 feet of N3B；Q1
The connection of the emitter of emitter and Q2 is attempted by the grid of Q3；The collector of Q1 meets+9V, and the collector of Q2 meets -9V.The source of Q3
Pole meets+9V, and drain electrode meets one end of R13, one end of another termination R14 of R13, another termination -25V of R14.1Bit DAC is first
The split-phase of 1Bit signal stream is realized by U2, is formed two-way complementary drive signals, is realized that the upper lower switch of half-bridge circuit controls respectively；
Wherein, 1,3,5 feet of U2 connect the junction of R13 and R14, while connecing the anode of D1；The cathode of D1 meets -25V；2,4,6 feet of U2
Connect, connects simultaneously with 9,11,13 feet of U2 again after connection；8,10,12 feet of U2 connect 6 feet of U1.It realizes in 1Bit DAC
Half-bridge circuit, it is characterised in that: U1 is half-bridge drive circuit, and the amplification for realizing 1Bit signal is cooperated with Q1, Q2.5 feet of U1 connect
1 foot of 13 feet of U2, U1 connects power supply and connects the anode of D2 simultaneously, and the cathode of D2 connects 2 feet of U1,2 feet of U1 again with one end of C6
It is connected, the other end of C6 is connected with 4 feet of U1.3 feet of U1 connect one end of R15, one end of another termination R16 of R15, R16's
4 feet of another termination U1；The cathode of D3 connects 3 feet of U1 simultaneously, and the anode of D3 connects the junction of R15 and R16；The grid of Q4 meets D3
Anode, the drain electrode of Q4 meets+25V, and the source level of Q4 connects 4 feet of U1.8 feet of U1 connect one end of R17, another termination R18's of R17
One end, 7 feet of another termination U1 of R18 and meets -25V；The cathode of D4 connects 8 feet of U1, and the anode of D4 meets the company of R17 and R18
Place is met, the grid of Q5 connects the anode of D4, and the drain electrode of Q5 connects 4 feet of U1, and the source level of Q5 connects 7 feet of U1.
As shown in figure 3, LED lamp panel circuit is made of 16 white light LEDs and current-limiting resistance RL1, rectangular distribution, every row by
4 LED connect to be formed, then are formed by 4 row parallel connections.J1, which is accessed, by modulated signal drives LED operation.
Claims (3)
1. a kind of visible light communication wireless broadcast system signal emission module circuit characterized by comprising Signal Matching electricity
Road, Delta-Sigma modulation circuit and LED lamp panel circuit；Wherein Signal Matching circuit includes: voice signal interface, impedance
Match and DC isolation, signal amplify three parts；R3 is in parallel with JS-Signal, the one end R3 ground connection；The one end capacitor C1 and R3 and
JS-Signal is connected, one end of another termination R1 of C1,2 feet of another termination N1 of R1, at the same 2 feet also with one end of R2
It is connected, 6 feet of another termination N1 of R2；In addition 3 feet of N1 connect one end of R4, the other end ground connection of R4.
2. visible light communication wireless broadcast system signal emission module circuit according to claim 1, it is characterised in that: institute
Stating Delta-Sigma modulation circuit includes: integrator, comparator, level shifting circuit and 1Bit DAC；
Integrator are as follows: 6 feet of N1 connect one end of R5, and 2 feet of another termination N2 of R5,2 feet of N2 connect one end of C2 at the same time,
6 feet of another termination N2 of C2；4 feet and 7 feet of N2 are grounded through capacitor C3, C4 respectively；The feed circuit of integrator is the one of R6
Terminate 2 feet of N2, one end of another termination C5 of R6, the other end ground connection of C5；The ungrounded end of a termination C5 of R7, R7's is another
4 feet of one termination U1；
Comparator are as follows: 6 feet of N2 connect one end of R8,9 feet of another termination N3B of R8, the 10 feet ground connection of N3B；At the same time,
7 feet of N3B connect one end of R9, and another termination+9V of R9, R9 is pull-up resistor；Start-up circuit is that 4 feet of N3A connect the one of R10
End, one end of another termination R11 of R10, and the junction of R10 and R11 meets+9V；5 feet of another termination N3A of R11；With
One end of 5 feet of this while R3A connection R12, one end of another termination C6 of R12, and the junction ground connection of R12 and C6；C6
Another termination N3A 4 feet；A reset button RST1 is bridged at the both ends of C6；In addition to this, 12 feet of N3A connect the 7 of N3B
Foot；
Level shifting circuit are as follows: the base stage of Q1 and Q2 connects together, and is attempted by 7 feet of N3B；The emitter of Q1 emitter and Q2 connect
It connects on the grid for being attempted by Q3；The collector of Q1 meets+9V, and the collector of Q2 meets -9V；The source electrode of Q3 meets+9V, and drain electrode connects R13's
One end, one end of another termination R14 of R13, another termination -25V of R14；
1Bit DAC: being realized the split-phase of 1Bit signal stream by U2, forms two-way complementary drive signals, realizes the upper and lower of half-bridge circuit
Switch controls respectively；1,3,5 feet of U2 connect the junction of R13 and R14, while connecing the anode of D1；The cathode of D1 meets -25V+5V；
2,4,6 feet of U2 connect, and connect simultaneously with 9,11,13 feet of U2 again after connection；8,10,12 feet of U2 connect 6 feet of U1；1Bit
Half-bridge circuit in DAC: U1 is half-bridge drive circuit, and the amplification for realizing 1Bit signal is cooperated with Q4, Q5；5 feet of U1 connect U2's
1 foot of 13 feet, U1 connects power supply and connects the anode of D2 simultaneously, and the cathode of D2 connects 2 feet of U1, and 2 feet of U1 are connected with one end of C6 again,
The other end of C6 is connected with 4 feet of U1；3 feet of U1 connect one end of R15, one end of another termination R16 of R15, the other end of R16
Connect 4 feet of U1；The cathode of D3 connects 3 feet of U1 simultaneously, and the anode of D3 connects the junction of R15 and R16；The grid of Q4 is meeting D3 just
Pole, the drain electrode of Q4 meet+25V, and the source level of Q4 connects 4 feet of U1；8 feet of U1 connect one end of R17, and the one of another termination R18 of R17
End, 7 feet of another termination U1 of R18 and meets -25V；The cathode of D4 connects 8 feet of U1, and the anode of D4 connects the connection of R17 and R18
Place, the grid of Q5 connect the anode of D4, and the drain electrode of Q5 connects 4 feet of U1, and the source level of Q5 connects 7 feet of U1.
3. visible light communication wireless broadcast system signal emission module circuit according to claim 1, it is characterised in that: institute
Stating LED lamp panel circuit includes: multiple white light LEDs and current-limiting resistance RL1 composition, and rectangular distribution, every row is by N number of LED series connection shape
At, then formed by N row parallel connection；J1, which is accessed, by modulated signal drives LED operation.
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| CN201910225980.8A CN109818673B (en) | 2019-03-25 | 2019-03-25 | A visible light communication wireless broadcast system signal transmitting module circuit |
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| CN201910225980.8A CN109818673B (en) | 2019-03-25 | 2019-03-25 | A visible light communication wireless broadcast system signal transmitting module circuit |
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