CN203982508U - A kind of digital Electroacooustic alarm - Google Patents
A kind of digital Electroacooustic alarm Download PDFInfo
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- CN203982508U CN203982508U CN201420426855.6U CN201420426855U CN203982508U CN 203982508 U CN203982508 U CN 203982508U CN 201420426855 U CN201420426855 U CN 201420426855U CN 203982508 U CN203982508 U CN 203982508U
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Abstract
The utility model relates to a kind of digital Electroacooustic alarm, and it comprises main control unit, and described main control unit is connected with audio frequency input block, alert sound unit, digital power amplifier unit, and the output terminal of digital power amplifier unit connects loudspeaker; Described digital power amplifier unit, audio frequency input block, alert sound unit are all connected with high power switching power supply unit with main control unit; The depletion of the utility model pipe is little, and thermal value reduces greatly, and single power can reach 2400W, and has adopted current protection technology, meets the needs of power amplifier completely; Adopted digital power amplifier technology, digital power amplifier circuit is most of adopts conventional discrete component to form, and peak power output can reach 2400W, carrying the high-power while, greatly reduces costs; Have that volume is little, loss is low, thermal value is little, output efficiency high; Required heating radiator reduces, and complete machine weight significantly alleviates, and has saved cost, has improved efficiency, has reduced the consumption of electric energy.
Description
Technical field
The utility model relates to a kind of warning horn, relates in particular to a kind of digital Electroacooustic alarm.
Background technology
Electroacoustic air-raid alarm is alarm sound delivery apparatus main in current civil air defense construction work, the Electroacooustic alarm product of China generally adopts the form of high-power linear power supply and analog amplifier at present, although some product has adopted Switching Power Supply, but the power of Switching Power Supply is all less, need to could meet with multiple power modules the requirement of high-power (2400W), and employing analog amplifier, power tube is in linear working state, when work, thermal value is large, efficiency is lower, need very large heating radiator, cause equipment volume greatly and very heavy, install and use inconvenient, digital power amplifier on domestic market adopts the special power amplifier module of ready-made import mostly, high-power power amplifier module also only has several hectowatts, and expensive.In addition, traditional Electroacooustic alarm function singleness, can only be used as warning horn, at ordinary times in idle state, causes the wasting of resources.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of can meet high-power requirement, digital Electroacooustic alarm easy to use, the problem existing to solve prior art.
For solving the problems of the technologies described above, the technical solution of the utility model is a kind of digital Electroacooustic alarm, it comprises main control unit, and described main control unit is connected with audio frequency input block, alert sound unit, digital power amplifier unit, and the output terminal of digital power amplifier unit connects loudspeaker; Described digital power amplifier unit, audio frequency input block, alert sound unit are all connected with high power switching power supply unit with main control unit;
The current foldback circuit that described high power switching power supply unit comprises main power circuit and protection main power circuit, described main power circuit is made up of the interchange input filter circuit connecting successively, rectification circuit, DC filtering circuit, pwm control circuit, PWM driving circuit, pwm power output circuit and transformation rectifying and wave-filtering voltage-stabilizing output circuit.Described high power switching power supply unit is also included as pwm control circuit provides the auxiliary power circuit of normal working voltage;
Described digital power amplifier unit comprises the triangle wave generating circuit and the analog audio input circuit that are connected with main control unit respectively, triangle wave generating circuit is all connected with waveform comparator with analog audio input circuit, and waveform comparator, pwm signal polarity transformation circuits, pwm signal driving circuit, pwm signal power amplification circuit, High frequency filter audio output circuit are connected successively with loudspeaker; Described High frequency filter audio output circuit is also connected with main control unit by testing circuit.
Described main control unit comprises main control singlechip, main control singlechip is connected with keystroke handling circuit, driving display circuit, sound circuit, Audio conversion treatment circuit respectively, sound circuit, audio frequency input block, alert sound unit are all connected with the input end of Audio conversion treatment circuit, and the output terminal of Audio conversion treatment circuit is connected with monitoring circuit, digital power amplifier unit respectively.
Described main control singlechip is ATMEGA16 single-chip microcomputer.
Described triangle wave generating circuit is made up of gun stocks and peripheral resistance-capacitance device.
Power amplifier in described pwm signal power amplification circuit is MOSFET pipe.
Described each functional unit is positioned at casing, on the front panel of casing, be mainly furnished with power switch, power stage switch, amplify/controlling alarm lock, amplifier power supply switch, stop key, detection key, microphonoscope volume knob, circuit volume knob, monitor volume knob, malfunction indicator lamp, broadcast pilot lamp, microphone/circuit input socket, stand by station microphone socket, power stage connection terminal, accumulator and reserved connection terminal and alarm pilot lamp.
Described main control unit is connected with serial ports remote control unit.
The beneficial effects of the utility model: 1, adopt high power switching power supply technology, replace traditional high-power linear power supply, because power tube is operated on off state, pipe depletion is little, thermal value reduces greatly, single power can reach 2400W, and has adopted current protection technology, meets the needs of power amplifier completely; 2, adopted digital power amplifier technology, digital power amplifier circuit is most of adopts conventional discrete component to form, and peak power output can reach 2400W, carrying the high-power while, greatly reduces costs; Compared with traditional analog amplifier, have that volume is little, loss is low, thermal value is little, output efficiency high; 3, thermal value is few more a lot of than traditional Electroacooustic alarm, and therefore required heating radiator reduces, and complete machine weight significantly alleviates, and has saved cost, has improved efficiency, has reduced the consumption of electric energy.
Brief description of the drawings
Fig. 1 is theory diagram of the present utility model.
Fig. 2 is front panel schematic diagram of the present utility model.
Fig. 3 is rear panel schematic diagram of the present utility model.
Fig. 4 is the circuit diagram of the audio frequency input block of Fig. 1.
Fig. 5 is the circuit diagram of the alert sound unit of Fig. 1.
Fig. 6 is the theory diagram of the main control unit of Fig. 1.
Fig. 7 is the circuit diagram of the high power switching power supply unit of Fig. 1.
Fig. 8 is the theory diagram of the digital power amplifier unit of Fig. 1.
Fig. 9 is the circuit diagram of the serial ports remote control unit of Fig. 1.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As shown in Figure 1, the utility model comprises audio frequency input block, alert sound unit, main control unit, digital power amplifier unit and high power switching power supply unit, described main control unit is connected with audio frequency input block, alert sound unit, digital power amplifier unit, and the output terminal of digital power amplifier unit connects loudspeaker; Described digital power amplifier unit, audio frequency input block, alert sound unit are all connected with high power switching power supply unit with main control unit.
As shown in Figure 2, each functional unit of the present utility model is positioned at casing, on the front panel of casing, be mainly furnished with power switch 1, power stage switch 2, amplify/controlling alarm lock 3, amplifier power supply switch 4, stop key 5, detect key 6, microphonoscope volume knob 7, circuit volume knob 8, monitor volume knob 9, malfunction indicator lamp 10, broadcast pilot lamp 11, microphone/circuit input socket 12, stand by station microphone socket 13, power stage connection terminal 14, accumulator and reserved connection terminal 15 and alarm pilot lamp 16; As shown in Figure 3, on the rear panel of casing, be furnished with power output socket 17, antenna 18, serial Remote Control Interface (15 core standard computer socket) 19, DC 48V input end 20, AC 220V input end 21 and GND earthing rod 22.
Described power switch 1, accumulator and reserved connection terminal 15 connect high power switching power supply unit, power stage switch 2 connects digital power amplifier unit, amplify/controlling alarm lock 3, amplifier power supply switch 4, stop key 5, detect key 6, microphonoscope volume knob 7, circuit volume knob 8, monitor volume knob 9, malfunction indicator lamp 10, broadcast pilot lamp 11, alarm pilot lamp 16 connects main control unit, microphone/circuit input socket 12 connects audio frequency input block, stand by station microphone socket 13 connects alert sound unit, power stage connection terminal 14 connects power stage switch 2, power output socket 17 connects power stage connection terminal 14, serial Remote Control Interface (15 core standard computer socket) 19 connects serial ports remote control unit, DC 48V input end 20 connects accumulator and reserved connection terminal 15, AC 220V input end 21 connects power switch 1, GND earthing rod 22 connect boxes, antenna 18 is for subsequent use.
Illustrate the principle of each functional module below:
As shown in Figure 4, the signal of realizing microphone and circuit when audio frequency input block is mainly used in amplifying is input to main control unit, after signal input, after signal being amplified by main control unit, needs this signal to switch and be input to digital power amplifier unit according to function.
As shown in Figure 5, alert sound unit is made up of AT89C2051 single-chip microcomputer and peripheral circuit thereof, and for generation of the alert tone signal of people's air defense, therefore alert tone signal is continuous, pure true to nature, and signal to noise ratio (S/N ratio) is high.Alert sound unit is mainly for generation of three kinds of alarm signals of people's air defense: alarm in advance, air raid alarm, sound all clear, the multiple alarm such as the condition of a disaster alarm, fire alarm.Alert tone signal is input to main control unit, need to this signal switching be input to digital power amplifier unit by main control unit according to function.
As shown in Figure 6, main control unit comprises that model is the main control singlechip of ATMEGA16, described main control unit comprises main control singlechip, main control singlechip is connected with keystroke handling circuit, driving display circuit, sound circuit, Audio conversion treatment circuit respectively, sound circuit, audio frequency input block, alert sound unit are all connected with the input end of Audio conversion treatment circuit, and the output terminal of Audio conversion treatment circuit is connected with monitoring circuit, digital power amplifier unit respectively.The major function of main control unit is as follows: the serial communication of realization and electroacoustic alarm controller, process front panel keys signal; According to the instruction of the state of panel button or the reception of serial ports remote control unit, complete the control to alert sound unit, realize the granting of alarm, and control driving display circuit and indicate corresponding duty; The instruction receiving according to the state of panel control lock or serial ports remote control unit, complete amplify, the switching of broadcast, alarm condition, and complete monitor function; The failure message detecting according to testing circuit, diagnosis actual fault point, and with lighting malfunction indicator lamp on panel and two kinds of modes of failure voice report are pointed out; While using central station or GPS module, can realize voice time-telling function.
As shown in Figure 7, current foldback circuit and auxiliary power circuit that high power switching power supply unit comprises main power circuit, protection main power circuit, it is the direct supply of 58V/22A that doubleway output is provided.Described main power circuit is made up of the interchange input filter circuit connecting successively, rectification circuit, DC filtering circuit, pwm control circuit, PWM driving circuit, pwm power output circuit and transformation rectifying and wave-filtering voltage-stabilizing output circuit, AC220V is transformed to two-way DC58V/22A voltage stabilizing output, provide working power to digital power amplifier, and ensure that line voltage can ensure stable output in 180V～260V wide-voltage range, ensures power amplifier steady operation; Auxiliary power circuit is made up of three end PWM on-off circuit TOP222 and peripheral circuit thereof, and its effect is in powering on, and AC220V is transformed to DC12V, offers the pwm control circuit SG3525A of main power circuit, can normally work; Current foldback circuit can ensure, in the time that working current is abnormal, to make main power circuit break-off, in order to avoid fault expands.It is the charging of standby accumulator jar that high power switching power supply unit is also provided with charging circuit, to meet when without alternating current, adopts the needs of DC battery jar power supply.
As shown in Figure 8, digital power amplifier unit comprises the triangle wave generating circuit and the analog audio input circuit that are connected with main control unit respectively, triangle wave generating circuit is all connected with waveform comparator with analog audio input circuit, and waveform comparator, pwm signal polarity transformation circuits, pwm signal driving circuit, pwm signal power amplification circuit, High frequency filter audio output circuit are connected successively with loudspeaker; Described High frequency filter audio output circuit is also connected with main control unit by testing circuit.Triangle wave generating circuit is made up of phase inverter CD4069 and peripheral capacitance resistance ware, and the triangular signal frequency of generation is about 300kHz, as the benchmark comparison signal that generates pulse-width signal.Switch the alert sound of output or the simulating signal such as amplify from main control unit, through amplifier TL082 analog audio input circuit, be input to LM311 waveform comparator with the triangular signal of triangle wave generating circuit generation simultaneously and carry out waveform comparison, export more afterwards the pwm signal that width changes with sound signal, pass through again polarity transformation circuits, make pwm signal change two opposite polarity balanced signals into and export by non-equilibrium, offer pwm signal driving circuit.Pwm signal driving circuit is mainly completed by gate circuit.After the pwm signal of balance is input to pwm signal driving circuit 2010S and further amplifies, drive pwm signal power amplification circuit to carry out power amplification.Pwm signal power amplification circuit is rear class bridge-type power amplification circuit, adopts high speed MOSFET pipe, and owing to being operated on off state, so power consumption is less, thermal value is few, and efficiency is high.Through the pwm power signal amplifying, after High frequency filter audio output circuit, therefrom restore simulated audio signal, finally output to loudspeaker.Testing circuit is sampled to power output signal, and the reference value comparison with setting, produces the discernible low and high level signal of single-chip microcomputer, detects the duty of power amplifier for main control unit.
As shown in Figure 9, in the utility model, middle control unit is also connected with serial ports remote control unit.When this serial ports remote control unit is mainly used in warning horn main control unit and external electroacoustic alarm controller or built-in control terminal serial communication, to the buffering of inputoutput data, to reduce the impact of external circuit on main control unit, ensure communication data transmitting.
The key technical indexes of the present utility model:
1, alarm signal source standard: derived digital signal
2, alarm kind: yellow alert, air raid alarm, sound all clear, the condition of a disaster alarm, fire alarm
3, power supply mode: AC/DC
AC-input voltage: AC180V～260V
DC input voitage: DC48V/50AH
4, direct current supply continuous working period >=0.5h
5, working temperature :-20 DEG C-+45 DEG C
6, physical dimension: 500 × 360 × 150mm3
7, weight: 22kg
8, output power: 2 × 1200W ± 20% (2 × 3 Ω/alarm signal)
>=2 × 480W (2 × 3 Ω/sinusoidal signal)
9, output impedance: 2 × 3 Ω
10, frequency response: 300Hz～8kHz/ ± 2dB
11, harmonic distortion :≤2%
12, microphone input sensitivity: 20mV/600 Ω
13, circuit input sensitivity: 200mV/10k Ω
14, signal to noise ratio (S/N ratio): >=70dB
Functional characteristics of the present utility model:
The utility model can be realized manual granting alarm in advance, air raid alarm, sounds all clear, the condition of a disaster alarm, fire alarm, the function such as test, amplify.If the machine connects electroacoustic alarm controller or built-in control terminal, coordinates with central station and also can realize call, broadcast, give the correct time (option) and time show function, be to realize manufacturing products for both peacetime and wartime us, people's air defense to one of desirable terminal device of civil defence conversion.This terminal adopts humanized design in addition, to different faults, can bright malfunction indicator lamp, and also can provide corresponding failure voice prompting.
A) alarm function
The multiple alarms such as the utility model can be provided alarm in advance, air raid alarm, sounds all clear, the condition of a disaster alarm, fire alarm, the mode of granting has two kinds, a kind of for by operational alarm device the machine button, realizes and manually provides alarm.Another kind is for the utility model is equipped with electroacoustic alarm controller or built-in control terminal, can be by the operating platform of central station, and carry out remote control and provide alarm.
B) amplify and broadcast capability
The utility model provides microphone input and two kinds of sound amplification functions of circuit input, can be used as at ordinary times sound amplifier and uses, and amplifies or external sound source signal for scene.For example: on-the-spot meeting, relay news or weather forecast etc.In addition, this product, by receiving after the broadcasting instructions of central station, can enter broadcast state, and under this state, the voice signal of central station can be reported away by this warning horn terminal, is suitable for teleconference, long-range report important announcement etc.
By above functional description, can find out the utility model except using as the specialized equipment of people's air defense wartime, also can be used as at ordinary times the multi-functional product for civilian use uses, for people's life provides service, embody well the manufacturing products for both peacetime and wartime us of people's air defense product, save social resources, the feature of serving the people.
Claims (7)
1. a digital Electroacooustic alarm, it comprises main control unit, it is characterized in that: described main control unit is connected with audio frequency input block, alert sound unit, digital power amplifier unit, and the output terminal of digital power amplifier unit connects loudspeaker; Described digital power amplifier unit, audio frequency input block, alert sound unit are all connected with high power switching power supply unit with main control unit;
The current foldback circuit that described high power switching power supply unit comprises main power circuit and protection main power circuit, described main power circuit is made up of the interchange input filter circuit connecting successively, rectification circuit, DC filtering circuit, pwm control circuit, PWM driving circuit, pwm power output circuit and transformation rectifying and wave-filtering voltage-stabilizing output circuit; Described high power switching power supply unit is also included as pwm control circuit provides the auxiliary power circuit of normal working voltage;
Described digital power amplifier unit comprises the triangle wave generating circuit and the analog audio input circuit that are connected with main control unit respectively, triangle wave generating circuit is all connected with waveform comparator with analog audio input circuit, and waveform comparator, pwm signal polarity transformation circuits, pwm signal driving circuit, pwm signal power amplification circuit, High frequency filter audio output circuit are connected successively with loudspeaker; Described High frequency filter audio output circuit is also connected with main control unit by testing circuit.
2. digital Electroacooustic alarm according to claim 1, it is characterized in that: described main control unit comprises main control singlechip, main control singlechip is connected with keystroke handling circuit, driving display circuit, sound circuit, Audio conversion treatment circuit respectively, sound circuit, audio frequency input block, alert sound unit are all connected with the input end of Audio conversion treatment circuit, and the output terminal of Audio conversion treatment circuit is connected with monitoring circuit, digital power amplifier unit respectively.
3. digital Electroacooustic alarm according to claim 2, is characterized in that: described main control singlechip is ATMEGA16 single-chip microcomputer.
4. digital Electroacooustic alarm according to claim 1, is characterized in that: described triangle wave generating circuit is made up of gun stocks and peripheral resistance-capacitance device.
5. digital Electroacooustic alarm according to claim 1, is characterized in that: the power amplifier in described pwm signal power amplification circuit is MOSFET pipe.
6. digital Electroacooustic alarm according to claim 1, it is characterized in that: described each functional unit is positioned at casing, on the front panel of casing, be mainly furnished with power switch (1), power stage switch (2), amplify/controlling alarm lock (3), amplifier power supply switch (4), stop key (5), detect key (6), microphonoscope volume knob (7), circuit volume knob (8), monitor volume knob (9), malfunction indicator lamp (10), broadcast pilot lamp (11), microphone/circuit input socket (12), stand by station microphone socket (13), power stage connection terminal (14), accumulator and reserved connection terminal (15) and alarm pilot lamp (16).
7. according to the arbitrary described digital Electroacooustic alarm of claim 1～6, it is characterized in that: described main control unit is connected with serial ports remote control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420426855.6U CN203982508U (en) | 2014-07-30 | 2014-07-30 | A kind of digital Electroacooustic alarm |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420426855.6U CN203982508U (en) | 2014-07-30 | 2014-07-30 | A kind of digital Electroacooustic alarm |
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| CN203982508U true CN203982508U (en) | 2014-12-03 |
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| CN201420426855.6U Expired - Lifetime CN203982508U (en) | 2014-07-30 | 2014-07-30 | A kind of digital Electroacooustic alarm |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107347171A (en) * | 2017-08-25 | 2017-11-14 | 东莞中拓机械技术开发有限公司 | A kind of pulsewidth modulation 600W+150W（PFC）Power amplifier module |
| CN107371095A (en) * | 2017-08-25 | 2017-11-21 | 东莞中拓机械技术开发有限公司 | A kind of pulsewidth modulation 350W 600W+150W power amplifier modules |
| CN107622631A (en) * | 2017-09-22 | 2018-01-23 | 郑州欧丽信大电子信息股份有限公司 | Digital electroacoustic alarm controls all-in-one |
| CN110415482A (en) * | 2019-08-29 | 2019-11-05 | 重庆金泓和瑞科技有限公司 | A kind of campus intelligent alarm work system |
-
2014
- 2014-07-30 CN CN201420426855.6U patent/CN203982508U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107347171A (en) * | 2017-08-25 | 2017-11-14 | 东莞中拓机械技术开发有限公司 | A kind of pulsewidth modulation 600W+150W（PFC）Power amplifier module |
| CN107371095A (en) * | 2017-08-25 | 2017-11-21 | 东莞中拓机械技术开发有限公司 | A kind of pulsewidth modulation 350W 600W+150W power amplifier modules |
| CN107371095B (en) * | 2017-08-25 | 2023-12-22 | 东莞精恒电子有限公司 | Pulse width modulation 350W-600W+150W power amplifier module |
| CN107347171B (en) * | 2017-08-25 | 2023-12-22 | 东莞精恒电子有限公司 | Pulse width modulation 600W+150W (PFC) power amplifier module |
| CN107622631A (en) * | 2017-09-22 | 2018-01-23 | 郑州欧丽信大电子信息股份有限公司 | Digital electroacoustic alarm controls all-in-one |
| CN110415482A (en) * | 2019-08-29 | 2019-11-05 | 重庆金泓和瑞科技有限公司 | A kind of campus intelligent alarm work system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141203 |