CN204408355U - A kind of broadcast and monitoring system - Google Patents
A kind of broadcast and monitoring system Download PDFInfo
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- CN204408355U CN204408355U CN201520092390.XU CN201520092390U CN204408355U CN 204408355 U CN204408355 U CN 204408355U CN 201520092390 U CN201520092390 U CN 201520092390U CN 204408355 U CN204408355 U CN 204408355U
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Abstract
The utility model discloses a kind of broadcast and monitoring system, comprise broadcast system and monitoring system, broadcast system comprises broadcast voice signal input, audio frequency pre-amplification circuit, power amplification circuit and loud speaker, monitoring system comprises monitoring audio amplifier circuit, and the output termination monitoring audio amplifier circuit monitors audio signal output end; Also comprise broadcast voice signal testing circuit and audio signal commutation circuit; The output of the sampling ending connecting audio pre-amplification circuit of broadcast voice signal testing circuit, exports the control signal input of termination audio signal commutation circuit; The output of power amplification circuit connects loud speaker by audio signal commutation circuit, and loud speaker connects the input monitoring audio amplifier circuit by audio signal commutation circuit.The utility model utilizes the voice input device of loud speaker as monitoring system of broadcast system, and two cover systems can share outside run, and circuit is simple, and cost is lower.
Description
[technical field]
The utility model relates to teller machines, particularly relates to a kind of broadcast and monitoring system.
[background technology]
In existing sounding electronic product, broadcast capability and monitor function separate, and namely a kind of sounding electronic product can only realize broadcast capability or monitor function, and can not realize this two kinds of functions in identical product.Now general sound is put product and is only had single power amplifier function or loudspeaker horn sound reproduction function, obviously, which has limited the use of product at special occasions.
In the occasion that some are special, occasion as large in flows of the people such as railway station, school, dancing hall, squares, not only to play music, broadcast carrys out normative order and guide people's normal life, also need monitoring condition sound simultaneously, prevent unexpected and dangerous generation, offer help in time and give first aid to, obviously in these occasions, the general single product with playing function cannot meet the demands.
The patent No. is that the utility model patent of CN201320616301.8 discloses a kind of broadcast based on PLC technology and monitoring system, comprises audio signal gathering-device, signal processor, modulator, power amplifier A, bidirectional, processor A, signal coupling network A, signal coupling network B, bidirectional, processor B, frequency converter, demodulator, audio frequency are put in advance, power amplifier B and audio signal playing device; The output of audio signal gathering-device is successively by being connected to 220VAC civil power by signal coupling network A after signal processor, modulator, power amplifier A, bidirectional, processor A, bidirectional, processor B by signal coupling network B from 220VAC civil power download audio modulation signal, and successively by frequency converter, demodulator, audio frequency put in advance with power amplifier B after be connected audio signal playing device.Although this utility model can understand rapidly the sound situation grasping illegal invasion, safety and protection system guardian utilizes broadcast system to give a warning to illegal invasion, but which employs broadcast and monitoring system two cover system, two cover systems connect up respectively, circuit structure is complicated, cost is higher.
[summary of the invention]
The technical problems to be solved in the utility model is to provide a kind of circuit structure simply, does not need other wiring, lower-cost broadcast and monitoring system.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is, a kind of broadcast and monitoring system, comprise broadcast system and monitoring system, broadcast system comprises broadcast voice signal input, audio frequency pre-amplification circuit, power amplification circuit and loud speaker; Monitoring system comprises monitoring audio amplifier circuit, and the output termination monitoring audio amplifier circuit monitors audio signal output end; Also comprise, broadcast voice signal testing circuit and audio signal commutation circuit; The output of the sampling ending connecting audio pre-amplification circuit of broadcast voice signal testing circuit, exports the control signal input of termination audio signal commutation circuit; The output of power amplification circuit connects loud speaker by audio signal commutation circuit, and loud speaker connects the input monitoring audio amplifier circuit by audio signal commutation circuit.
Above-described broadcast and monitoring system, audio signal commutation circuit comprises single-chip microcomputer, relay drive circuit and relay, and the output of broadcast voice signal testing circuit connects the control signal input of single-chip microcomputer; First control signal of single-chip microcomputer exports the control signal input of termination power amplification circuit, the second control signal output contact relay drive circuit control end of single-chip microcomputer, relay drive circuit output contact relay; Relay is double-point double-throw switch, and the fixed contact of double-point double-throw switch connects loud speaker, and the first moving contact connects the output of power amplification circuit, and the second moving contact connects the input monitoring audio amplifier circuit.
Above-described broadcast and monitoring system, comprise Control Room, and Control Room comprises teller machines and audiomonitor, and teller machines connects broadcast voice signal input, and audiomonitor connects monitoring audio signal output end.
Above-described broadcast and monitoring system, described monitoring audio amplifier circuit is high resistant instrument amplifier.
Above-described broadcast and monitoring system, broadcast voice signal testing circuit comprises amplifying circuit and switching tube, the output of the input ending connecting audio pre-amplification circuit of amplifying circuit, exports the control end of termination switching tube; The first end of switching tube connects DC power anode by current-limiting resistance, the second end ground connection, and the first end of switching tube connects the control signal input of single-chip microcomputer as the output of broadcast voice signal testing circuit.
Above-described broadcast and monitoring system, amplifying circuit comprises operational amplifier, the first resistance, the first electric capacity, the first voltage stabilizing didoe and the second voltage stabilizing didoe; The in-phase input end of operational amplifier connects the first output of audio frequency pre-amplification circuit by the second resistance, inverting input connects the second output of audio frequency pre-amplification circuit by the 3rd resistance and the second electric capacity, and output connects the control end of switching tube by the 3rd electric capacity and the 4th resistance; First resistance and the first electric capacity are connected across between the inverting input of operational amplifier and output respectively; After the anode of the first voltage stabilizing didoe and the second voltage stabilizing didoe is interconnected, negative electrode connects inverting input and the output of operational amplifier respectively.
Above-described broadcast and monitoring system, described switching tube is metal-oxide-semiconductor, the grid of metal-oxide-semiconductor connects the output of amplifying circuit, the drain electrode of metal-oxide-semiconductor connects DC power anode by current-limiting resistance, source ground, the drain electrode of metal-oxide-semiconductor connects the control signal input of single-chip microcomputer as the output of broadcast voice signal testing circuit.
Broadcast of the present utility model and monitoring system utilize the loud speaker of broadcast system as monitoring system voice input device, two cover systems can share outside wiring, and circuit is simple, and cost is lower.
Broadcast of the present utility model and monitoring system can be monitored the ambient sound of place environment, on square, the large place of market, the stream of people such as station can Timeliness coverage and process accident and emergency case, working condition in high-risk workplaces such as some factories, power station, collieries by sound monitoring instrument and equipment, is convenient to carry out maintenance and maintenance work in time.
[accompanying drawing explanation]
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is the theory diagram of the broadcast of the utility model embodiment and monitoring system.
Fig. 2 is the circuit theory diagrams of the utility model embodiment broadcast voice signal testing circuit.
Fig. 3 is the circuit diagram of the utility model embodiment relay drive circuit.
[embodiment]
The principle of the broadcast of the utility model embodiment and monitoring system as depicted in figs. 1 and 2, comprise broadcast system and monitoring system, broadcast system comprises teller machines, audio frequency pre-amplification circuit, power amplification circuit and loud speaker, monitoring system comprises monitors audio amplifier circuit and audiomonitor, monitors the output termination audiomonitor of audio amplifier circuit.In addition, broadcast voice signal testing circuit and audio signal commutation circuit is also comprised.The output of the sampling ending connecting audio pre-amplification circuit of broadcast voice signal testing circuit, exports the control signal input of termination audio signal commutation circuit.The output of power amplification circuit connects loud speaker by audio signal commutation circuit, and loud speaker connects the input monitoring audio amplifier circuit by audio signal commutation circuit.
When broadcast voice signal testing circuit certain time (such as 5 seconds) does not detect the audio signal such as music, broadcast transmitting out from the teller machines Control Room, loud speaker is connected to monitoring audio amplifier circuit by audio signal commutation circuit, and speaker operation is in microphone modes.Now the audio signal such as ambient sound is received by the loud speaker as apparatus for receiving audio, and carry out power amplification through monitoring audio amplifier circuit, Output rusults after amplification is transported to the audiomonitor in Control Room through tone frequency channel wire, in Control Room, so just can understand on-the-spot situation in time, carry out the Emergency Preparedness of emergency case.When broadcast voice signal testing circuit detects the audio signal such as music, broadcast transmitting out from Control Room teller machines, loud speaker is connected to power amplification circuit by audio signal commutation circuit, and loud speaker returns to normal broadcast pattern.
As shown in Figure 1, audio signal commutation circuit comprises single-chip microcomputer, relay drive circuit and relay, and the output of broadcast voice signal testing circuit connects the control signal input of single-chip microcomputer.First control signal of single-chip microcomputer exports the control signal input of termination power amplification circuit, the second control signal output contact relay drive circuit control end of single-chip microcomputer, relay drive circuit output contact relay.Relay is double-point double-throw switch, and the fixed contact of double-point double-throw switch connects loud speaker, and the first moving contact connects the output of power amplification circuit, and the second moving contact connects the input monitoring audio amplifier circuit.
When broadcast voice signal testing circuit certain time (such as 5 seconds) does not detect the audio signal such as music, broadcast transmitting out from the teller machines Control Room, broadcast voice signal testing circuit is to single-chip microcomputer output low level control signal, first control signal output pin of single-chip microcomputer is to the control pin output low level control signal of power amplification circuit (power amplifier chips TDA8932), and power amplification circuit is closed audio frequency and exported.
Meanwhile, single-chip microcomputer second control signal output pin output low level control signal, worked by relay drive circuit control relay, the connection of power amplification circuit and loud speaker is switched to loud speaker to be connected with monitoring audio amplifier circuit, now, acoustical signal, in microphone modes, is converted to the signal of telecommunication by speaker operation.Ambient sound monitored audio amplifier circuit (high resistant instrument amplifier) after loud speaker receives amplifies, loud speaker exports as high impedance 16 Ω audio frequency exports, audio signal after amplification flows to the monitoring reception equipment in Control Room, the impedance of monitoring reception equipment also should be high impedance, thus completes the monitoring to ambient sound.
When broadcast voice signal testing circuit detects the audio signal such as music, broadcast transmitting out from Control Room teller machines, broadcast voice signal testing circuit exports high-level control signal to single-chip microcomputer, first control signal output pin of single-chip microcomputer exports high-level control signal to the control pin of power amplification circuit (power amplifier chips TDA8932), and power amplification circuit recovers audio frequency and exports.
Meanwhile, second control signal output pin of single-chip microcomputer exports high-level control signal, worked by relay drive circuit control relay, loud speaker is connected with monitoring audio amplifier circuit the connection being switched to power amplification circuit and loud speaker, now, loud speaker returns to normal broadcast pattern, now power amplification circuit exports as Low ESR, loud speaker also corresponds to impedance speakers, power amplification circuit exports and converts electrical signals to acoustical signal through loud speaker, realizes the broadcasting of music, broadcast etc.
As shown in Figure 2, broadcast voice signal testing circuit comprises amplifying circuit and metal-oxide-semiconductor Q1.
Amplifying circuit comprises operational amplifier U3B, resistance R1, electric capacity C1, voltage stabilizing didoe D1 and voltage stabilizing didoe D2.
The in-phase input end of operational amplifier U3B meets the first output P2 of audio frequency pre-amplification circuit by resistance R2, the inverting input of operational amplifier U3B meets the second output P1. operational amplifier U3B of audio frequency pre-amplification circuit output by resistance R3 and electric capacity C2 connects the grid end of metal-oxide-semiconductor Q1 by electric capacity C3 and resistance R4.
Between the inverting input that resistance R1 and electric capacity C1 is connected across operational amplifier U3B respectively and output, resistance R1 and R3 determines the multiplication factor of this operational amplifier, and electric capacity C1 is the anti-oscillating capacitance keeping operational amplifier steady operation.After the anode of voltage stabilizing didoe D1 and voltage stabilizing didoe D2 is interconnected, negative electrode connects inverting input and the output of operational amplifier U3B respectively, act as the overload protection of operational amplifier U3B.
The drain electrode of metal-oxide-semiconductor Q1 meets DC power anode+5V by current-limiting resistance R30, source ground, and the drain electrode of metal-oxide-semiconductor Q1 meets the control signal input P3 of single-chip microcomputer as the output of broadcast voice signal testing circuit.
The broadcast of the above embodiment of the utility model and monitoring system utilize the voice input device of loud speaker as monitoring system of broadcast system, and two cover systems can share outside wiring, and circuit is simple, and cost is lower.
The broadcast of the above embodiment of the utility model and monitoring system can be monitored the ambient sound of place environment, on square, the large place of market, the stream of people such as station can Timeliness coverage and process accident and emergency case, working condition in high-risk workplaces such as some factories, power station, collieries by sound monitoring instrument and equipment, is convenient to carry out maintenance and maintenance work in time.
Claims (7)
1. broadcast and a monitoring system, comprise broadcast system and monitoring system, broadcast system comprises broadcast voice signal input, audio frequency pre-amplification circuit, power amplification circuit and loud speaker; Monitoring system comprises monitoring audio amplifier circuit, the output termination monitoring audio amplifier circuit monitors audio signal output end, it is characterized in that, comprise broadcast voice signal testing circuit and audio signal commutation circuit, the output of the sampling ending connecting audio pre-amplification circuit of broadcast voice signal testing circuit, exports the control signal input of termination audio signal commutation circuit; The output of power amplification circuit connects loud speaker by audio signal commutation circuit, and loud speaker connects the input monitoring audio amplifier circuit by audio signal commutation circuit.
2. broadcast according to claim 1 and monitoring system, is characterized in that, audio signal commutation circuit comprises single-chip microcomputer, relay drive circuit and relay, and the output of broadcast voice signal testing circuit connects the control signal input of single-chip microcomputer; First control signal of single-chip microcomputer exports the control signal input of termination power amplification circuit, the second control signal output contact relay drive circuit control end of single-chip microcomputer, relay drive circuit output contact relay; Relay is double-point double-throw switch, and the fixed contact of double-point double-throw switch connects loud speaker, and the first moving contact connects the output of power amplification circuit, and the second moving contact connects the input monitoring audio amplifier circuit.
3. broadcast according to claim 1 and monitoring system, is characterized in that, comprises Control Room, and Control Room comprises teller machines and audiomonitor, and teller machines connects broadcast voice signal input, and audiomonitor connects monitoring audio signal output end.
4. broadcast according to claim 1 and monitoring system, is characterized in that, described monitoring audio amplifier circuit is high resistant instrument amplifier.
5. broadcast according to claim 1 and monitoring system, is characterized in that, broadcast voice signal testing circuit comprises amplifying circuit and switching tube, the output of the input ending connecting audio pre-amplification circuit of amplifying circuit, exports the control end of termination switching tube; The first end of switching tube connects DC power anode by current-limiting resistance, the second end ground connection, and the first end of switching tube connects the control signal input of single-chip microcomputer as the output of broadcast voice signal testing circuit.
6. broadcast according to claim 5 and monitoring system, is characterized in that, amplifying circuit comprises operational amplifier, the first resistance, the first electric capacity, the first voltage stabilizing didoe and the second voltage stabilizing didoe; The in-phase input end of operational amplifier connects the first output of audio frequency pre-amplification circuit by the second resistance, inverting input connects the second output of audio frequency pre-amplification circuit by the 3rd resistance and the second electric capacity, and output connects the control end of switching tube by the 3rd electric capacity and the 4th resistance; First resistance and the first electric capacity are connected across between the inverting input of operational amplifier and output respectively; After the anode of the first voltage stabilizing didoe and the second voltage stabilizing didoe is interconnected, negative electrode connects inverting input and the output of operational amplifier respectively.
7. broadcast according to claim 5 and monitoring system, it is characterized in that, described switching tube is metal-oxide-semiconductor, the grid of metal-oxide-semiconductor connects the output of amplifying circuit, the drain electrode of metal-oxide-semiconductor connects DC power anode by current-limiting resistance, source ground, the drain electrode of metal-oxide-semiconductor connects the control signal input of single-chip microcomputer as the output of broadcast voice signal testing circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520092390.XU CN204408355U (en) | 2015-02-10 | 2015-02-10 | A kind of broadcast and monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520092390.XU CN204408355U (en) | 2015-02-10 | 2015-02-10 | A kind of broadcast and monitoring system |
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| CN204408355U true CN204408355U (en) | 2015-06-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105071886A (en) * | 2015-08-24 | 2015-11-18 | 苏州华启智能科技有限公司 | Audio bus multiplexing system of vehicle-mounted broadcast system |
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- 2015-02-10 CN CN201520092390.XU patent/CN204408355U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105071886A (en) * | 2015-08-24 | 2015-11-18 | 苏州华启智能科技有限公司 | Audio bus multiplexing system of vehicle-mounted broadcast system |
| CN105071886B (en) * | 2015-08-24 | 2017-12-19 | 苏州华启智能科技有限公司 | A kind of vehicle-mounted broadcasting system audio bus-sharing system |
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Effective date of registration: 20160809 Address after: 3, building 2, building 2, 523000 Industrial Zone, Daling mountain town, Dongguan, Guangdong Patentee after: Guangdong core electroacoustic technology Co., Ltd. Address before: 518000 Guangdong city of Shenzhen province Baoan District City Avenue Xixiang Airlines turn Gushu Industrial Park building A.B building A floor four floor of the South South A. A Patentee before: Xin electricity Wei Science and Technology Ltd. of Shenzhen |