CN103905957A - Multifunctional amplifying and warning system - Google Patents
Multifunctional amplifying and warning system Download PDFInfo
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- CN103905957A CN103905957A CN201410130258.3A CN201410130258A CN103905957A CN 103905957 A CN103905957 A CN 103905957A CN 201410130258 A CN201410130258 A CN 201410130258A CN 103905957 A CN103905957 A CN 103905957A
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Abstract
The invention provides a multifunctional amplifying and warning system. The multifunctional amplifying and warning system can achieve the dual functions of amplifying and warning and achieve the function of free external sound input. A chip which relates to the multifunctional amplifying and warning system mainly comprises a high-performance low-noise operational amplifier NE5532, a SP3T switch SEM133TNarda, a double-tone oscillator, an electret microphone and a power amplifier LM1875BTL, wherein the double-tone oscillator is composed of two NE555 ICs. The multifunctional amplifying and warning system is provided with three input ports and two output ports. An input end collects a signal to be amplified of environmental noise and a signal to be amplified of additive environmental noise through the electret microphone, a differential operation circuit performs differential operation on the two input signals to remove the noise, a sound signal output by the differential operation circuit enters a tone control circuit, and therefore control over a high tone and a low tone is achieved. A warner produces output voltage with phase-to-phase frequency through the double-tone oscillator which is composed of the two NE555 ICs. Output signal voltage is the sum of high-frequency voltage and low-frequency voltage. A difference channel is composed of two triodes with the same polarity, and the symmetrical design has excellent effect on offsetting the temperature drift of the circuit.
Description
Technical field
The invention belongs to electronic technology application in daily life, particularly a kind of multi-functional amplifying has the Circuits System of warning function concurrently, can realize triple functions.
Background technology
At present, amplify and be widely used in the various aspects of daily life with warning circuit, such as meeting, broadcast, fire alarm early warning, and the indispensable part of some large scale electronic equipments.But what we contacted at ordinary times amplifies or warning device, can only realize wherein a kind of function, and traditional single channel is adopted sound input and is very easily subject to the interference of outside noise.And, in tone control electronic circuit, often there will be temperature to float effect, affect the effect that audio frequency amplifies.
Summary of the invention
The object of the invention just shortcoming based on existing in above-mentioned prior art, with not enough, proposes a kind of multi-functional amplifying and warning system circuit, uses convenient, function is more comprehensive, can be used alone, also can be used as certain part of electronic apparatus system, be aided with other control circuits and use.
Multi-functional amplifying and warning system provided by the invention, comprises audio frequency amplifier section, selects report to the police part and outer sound importation; The acoustic-electric conversion input of audio frequency amplifier section adopts two parallel inputs, comprise first sound power conversion circuit and rising tone power conversion circuit, two acoustic-electric change-over circuits are input to difference ratio computing circuit respectively after audio frequency amplifies, and the output of calculus of differences circuit connects conversion and selects control circuit after tone control circuit; The part of selecting to report to the police is made up of the alternate alarm signal generation module of height, and the output of this module is connected conversion and selected control circuit by polar capacitor; Outer sound importation also connects conversion simultaneously and selects control circuit; Conversion is connected electroacoustic transformed load with selecting control circuit after LM1875BTL power amplification circuit.
Described calculus of differences circuit adopts the identical and temperature coefficient of polarity to be ± symmetrical structure of the resistance parallel connection of 100ppm/ DEG C, has well eliminated the temperature of circuit and has floated effect, has promoted stiffness of system; In the time of tone control circuit, warning circuit and the work of outer sound input circuit You Yi road, all the other two inputs, in holding state, have reduced the power consumption of circuit, have effectively realized energy-conserving and environment-protective.
Described double input end carries out entering the tone control circuit being made up of NE5532 after calculus of differences; NE5532 is high-performance low-noise amplifier, has good noiseproof feature, good actuating force and quite high small-signal and power supply bandwidth.LM1875BTL power amplifier is with respect to OCL circuit or OTL circuit, and advantage is that power utilization rate is 4 times of first two circuit, has effectively promoted power utilization rate, has saved the energy.
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advantage of the present invention and good effect:
The present invention is based on audio-amplifying circuit, comparatively single mainly for the effect in current alarm, on the basis of audio-amplifying circuit, realize several functions.Solve the shortcoming that common alarm can only be reported to the police, when warning, can also carry out people's vocal input and report warning or notice, come can effectively inform evacuation route or urgent counter-measure in accident or alarm, and each function can switch rapidly temporarily, improve and processed the ageing of reply.Aspect noise, performance is good, and stiffness of system is high, and native system is realized miscellaneous function among can also being applied to other Circuits System as local circuit.
design brief description of the drawings
Fig. 1 is the circuitry structure chart of patent of the present invention.
Fig. 2 is the calculus of differences circuit in patent circuit of the present invention.
Fig. 3 is the double tone oscillator circuit in patent circuit of the present invention, i.e. the alternate alarm signal generation module of height.
Fig. 4 is the circuitry schematic diagram of patent of the present invention.
Below in conjunction with drawings and Examples, patent of the present invention is further illustrated.
Embodiment
embodiment 1:
As shown in Figure 1, multi-functional amplifying and warning system provided by the invention, comprises audio frequency amplifier section, selects report to the police part and outer sound importation; The acoustic-electric conversion input of audio frequency amplifier section adopts two parallel inputs, comprise first sound power conversion circuit and rising tone power conversion circuit, two acoustic-electric change-over circuits are input to difference ratio computing circuit respectively after audio frequency amplifies, and the output of difference ratio computing circuit connects conversion and selects control circuit after tone control circuit; The part of selecting to report to the police is made up of the alternate alarm signal generation module of height, and the output of this module connects conversion and selects control circuit; Outer sound importation also connects conversion simultaneously and selects control circuit; Conversion is connected electroacoustic transformed load with selecting control circuit after LM1875BTL power amplification circuit.
In Fig. 1, have three tunnels and enter conversion and select control circuit, the signal of choosing enters LM1875BTL power amplification circuit, then converts electrical signals to voice signal output through electroacoustic transformed load.
Fig. 2 left side circuit is the calculus of differences circuit taking NE5532 as core, and two-way input signal, from the parallel two-way resistance terminal input of symmetry, exports audio amplifier circuit to by capacitance terminal after calculus of differences; Fig. 2 right side circuit is double tone oscillator, corresponding with the alternate alarm signal generation module of height in Fig. 1, can produce the alternate voltage waveform signal of height frequency, it is made up of two NE555, the output of first NE555 is received the Vc end of second NE555 as input, and 5 ends of second NE555 are subject to the modulation of first output voltage u1.What add due to 5 pin is square-wave signal, when u1 is high level, by interlaminated resistance, 5 pin voltages is raised, and the charging interval of timing capacitor is elongated, and frequency reduces; In the time that u1 is low level, make 5 pin lower voltages, the timing capacitor charging interval shortens, and the proper cycle shortens, and frequency raises, so the frequency of its output waveform is alternate variation.
After leading up in three tunnel signal elements, all the other two paths of signals unit are in holding state; The signal passing through, through LM1875BTL power amplification circuit, is finally delivered to acoustic-electric transformed load, realizes the functions such as audio frequency amplification, Realtime Alerts or outer sound input.
Claims (3)
1. multi-functional amplifying and warning system, is characterized in that, this system comprises audio frequency amplifier section, selects report to the police part and outer sound importation; The acoustic-electric conversion input of audio frequency amplifier section adopts two parallel inputs, comprise first sound power conversion circuit and rising tone power conversion circuit, two acoustic-electric change-over circuits are input to difference ratio computing circuit respectively after audio frequency amplifies, and the output of difference ratio computing circuit connects conversion and selects control circuit after tone control circuit; The part of selecting to report to the police is made up of the alternate alarm signal generation module of height, and the output of this module connects conversion and selects control circuit; Outer sound importation also connects conversion simultaneously and selects control circuit; Conversion is connected electroacoustic transformed load with selecting control circuit after LM1875BTL power amplification circuit.
2. multi-functional amplifying and warning system according to claim 1, it is characterized in that described calculus of differences circuit adopts the symmetrical structure of the identical and temperature coefficient of polarity for the resistance parallel connection of ± 100ppm/ DEG C, well eliminate the temperature of circuit and floated effect, promoted stiffness of system; In the time that circuit is selected to lead up to, all the other two inputs, in holding state, have reduced the power consumption of circuit, have effectively realized energy-conserving and environment-protective.
3. multi-functional amplifying and warning system according to claim 1, is characterized in that described double input end carries out entering the tone control circuit being made up of NE5532 after calculus of differences; NE5532 is high-performance low-noise amplifier, has good noiseproof feature, good actuating force and quite high small-signal and power supply bandwidth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410130258.3A CN103905957A (en) | 2014-04-02 | 2014-04-02 | Multifunctional amplifying and warning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410130258.3A CN103905957A (en) | 2014-04-02 | 2014-04-02 | Multifunctional amplifying and warning system |
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| CN103905957A true CN103905957A (en) | 2014-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410130258.3A Pending CN103905957A (en) | 2014-04-02 | 2014-04-02 | Multifunctional amplifying and warning system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105157818A (en) * | 2015-08-28 | 2015-12-16 | 苏州市博得立电源科技有限公司 | Portable environmental noise measuring instrument |
| CN108315741A (en) * | 2018-02-08 | 2018-07-24 | 中国特种设备检测研究院 | A kind of pipe current detection device |
| CN110581929A (en) * | 2019-09-12 | 2019-12-17 | 周操操 | Alarm circuit of radiotherapy system |
| JP2021029040A (en) * | 2019-08-09 | 2021-02-25 | 新コスモス電機株式会社 | Signal processing circuit and alarm unit |
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|---|---|---|---|---|
| CN2038650U (en) * | 1988-11-01 | 1989-05-31 | 山东省生建摩托车厂 | Electronic radio set with alarm unit |
| CN2058795U (en) * | 1989-08-16 | 1990-06-27 | 王志华 | Antinoise micorphone |
| CN2938667Y (en) * | 2006-08-09 | 2007-08-22 | 上海航天机电设备有限公司 | Power amplification controller for fire emergency broadcast |
| CN200997682Y (en) * | 2007-01-26 | 2007-12-26 | 刘鉴明 | Special loundspaker for increasing speech resolution in conference |
| CN201673564U (en) * | 2010-05-26 | 2010-12-15 | 郑州欧丽信大电子信息股份有限公司 | Portable electronic alarm |
| CN201765649U (en) * | 2010-05-26 | 2011-03-16 | 郑州欧丽信大电子信息股份有限公司 | Electroacooustic alarm |
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2014
- 2014-04-02 CN CN201410130258.3A patent/CN103905957A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2038650U (en) * | 1988-11-01 | 1989-05-31 | 山东省生建摩托车厂 | Electronic radio set with alarm unit |
| CN2058795U (en) * | 1989-08-16 | 1990-06-27 | 王志华 | Antinoise micorphone |
| CN2938667Y (en) * | 2006-08-09 | 2007-08-22 | 上海航天机电设备有限公司 | Power amplification controller for fire emergency broadcast |
| CN200997682Y (en) * | 2007-01-26 | 2007-12-26 | 刘鉴明 | Special loundspaker for increasing speech resolution in conference |
| CN201673564U (en) * | 2010-05-26 | 2010-12-15 | 郑州欧丽信大电子信息股份有限公司 | Portable electronic alarm |
| CN201765649U (en) * | 2010-05-26 | 2011-03-16 | 郑州欧丽信大电子信息股份有限公司 | Electroacooustic alarm |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105157818A (en) * | 2015-08-28 | 2015-12-16 | 苏州市博得立电源科技有限公司 | Portable environmental noise measuring instrument |
| CN108315741A (en) * | 2018-02-08 | 2018-07-24 | 中国特种设备检测研究院 | A kind of pipe current detection device |
| CN108315741B (en) * | 2018-02-08 | 2020-04-03 | 中国特种设备检测研究院 | Pipeline current detection device |
| JP2021029040A (en) * | 2019-08-09 | 2021-02-25 | 新コスモス電機株式会社 | Signal processing circuit and alarm unit |
| CN110581929A (en) * | 2019-09-12 | 2019-12-17 | 周操操 | Alarm circuit of radiotherapy system |
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Application publication date: 20140702 |
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