CN203535729U - Audio signal transmission system - Google Patents
Audio signal transmission system Download PDFInfo
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- CN203535729U CN203535729U CN201320724360.7U CN201320724360U CN203535729U CN 203535729 U CN203535729 U CN 203535729U CN 201320724360 U CN201320724360 U CN 201320724360U CN 203535729 U CN203535729 U CN 203535729U
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Abstract
The utility model discloses an audio signal transmission system. The audio signal transmission system comprises: a plurality of signal acquisition circuits which are connected in a parallel manner, wherein each signal acquisition circuit includes a sound sensor used for acquiring sound information of a corresponding zone, and a demodulation and filtering circuit used for carrying out demodulation and filtering for the sound information, and converting the sound information into digital signals; an amplifier, wherein the amplifier is connected with the signal acquisition circuits through a switch circuit which is conducted with a set signal acquisition circuit according to a switch driving signal, and the amplifier is used for amplifying a digital signal of the set signal acquisition circuit; an output device, which is used for outputting the amplified digital signal; a controller, which is connected with the switch circuit, generates the switch driving signal according to a control instruction, and is used for carrying out alarm judgement for the digital signal of the set signal acquisition circuit; and a human-machine interaction panel which is used for inputting the control instruction. With audio signal transmission system, accuracy of alarm judgement is guaranteed.
Description
Technical field
The utility model relates to safety alarm device technical field, more particularly, relates to a kind of audio frequency signal transmission system.
Background technology
The embodiments of the present invention that be intended to for stating in claims this part provide background or context.Description herein can comprise the concept that can probe into, but the concept of having expected or having probed into not necessarily.Therefore, unless at this, point out, the content of describing in this part is not prior art for the application's instructions and claims, and not because be included in just admit it is prior art in this part.
Along with scientific and technological progress, thief's theft technical ability is high-technicalization more and more also, because also more and more higher to the requirement of the safety alarm device of property.At present, the safety alarm device generally using both at home and abroad has infrared warning device, ultrasonic alarm, microwave alarm, Vibration alarm device and human body sensing warning device etc.
Above-mentioned warning device has its intrinsic service condition, thereby make its usability there is limitation, as infrared detection device, be easy to be subject to the restriction of installation environment, Vibration alarm device can only detect vibration and be ignorant of judging and easily cause false alarm by oscillatory type, microwave sounding is because penetration power is strong, easily be subject to external interference, above various reasons, all can affect the correctness of warning.
Audio frequency signal transmission system has solved the problems referred to above, and it adopts acoustic information as alarm decision signal, according to the acoustic information of search coverage, has judged whether invader, and then makes reporting to the police and process.But traditional audio frequency signal transmission system, can not carry out alarm decision to low frequency signal, accuracy is low.
Utility model content
For solving the problems of the technologies described above, the utility model provides a kind of audio frequency signal transmission system, and described audio frequency signal transmission system can be monitored low frequency signal, has improved the accuracy of reporting to the police.
For achieving the above object, the utility model provides following technical scheme:
An audio frequency signal transmission system, described audio frequency signal transmission system comprises:
Many signal acquisition circuits in parallel, described signal acquisition circuit comprises: for gathering the sound transducer of corresponding search coverage acoustic information; For described acoustic information being carried out to be converted to after demodulation and filtering are processed the demodulation filtering circuit of digital signal;
The amplifier being connected with described signal acquisition circuit by on-off circuit, described on-off circuit is according to the signal acquisition circuit conducting of switching drive signal and setting, and described amplifier is for amplifying the digital signal of the signal acquisition circuit of described setting;
Be connected with described amplifier, for the output device that the digital signal after amplifying is exported;
Be connected with described on-off circuit, according to steering order, generate described switching drive signal, for the digital signal of the signal acquisition circuit of described setting being carried out to the controller of alarm decision, when being judged as warning, described controller sends to report to the police and drives signal to be used for driving warning device to report to the police;
For inputting the man-machine interaction panel of described steering order.
Preferably, in above-mentioned audio frequency signal transmission system, also comprise:
8 groups of malfunction indicator lamp, described malfunction indicator lamp connects one to one by fault and level displaing circuit and described signal acquisition circuit, when the digital signal of arbitrary bars Acquisition Circuit is less than setting threshold, described fault and level displaing circuit are controlled the malfunction indicator lamp corresponding with described signal acquisition circuit and are opened circuit.
Preferably, in above-mentioned audio frequency signal transmission system, also comprise:
One end is connected with described controller, the charactron that the other end is connected with described man-machine interaction panel, and described charactron is for showing the numeral number of the signal acquisition circuit of current and described on-off circuit conducting.
Preferably, in above-mentioned audio frequency signal transmission system, described output device is amplifirer.
Preferably, in above-mentioned audio frequency signal transmission system, described output device is the LED lamp being connected with described amplifier by level displaing circuit.
Preferably, in above-mentioned audio frequency signal transmission system, described output device comprises:
Amplifirer with described control linkage;
The LED lamp being connected with described amplifier by level displaing circuit.
Preferably, in above-mentioned audio frequency signal transmission system, described warning device is audible alarm unit and/or signal lamp warning device.
Preferably, in above-mentioned audio frequency signal transmission system, described sound transducer is inputted by optical fiber and/or the input of 485 signals is connected with described demodulation filtering circuit.
From technique scheme, can find out, the acoustic information of the corresponding search coverage of each signal acquisition circuit collection of audio frequency signal transmission system provided by the utility model is converted to digital signal through demodulation process, carry out again filtering and process the interfere information in digital signal described in filtering, then by controlling the conducting state of described on-off circuit, on the one hand, can to the digital signal of the signal acquisition circuit of setting, amplify by described amplifier, and by output device, the digital signal after amplifying is exported, security monitoring personnel can carry out alarm decision according to the Output rusults of described output device, due to filtering undesired signal, can prevent that undesired signal is exaggerated and be exported by described output device, so can export low frequency signal, guaranteed the accuracy of reporting to the police, on the other hand, by demodulation and filtering, process, also avoided the impact of undesired signal on controller judgement, make controller to carry out automatic alarm judgement to low frequency signal, guaranteed the accuracy of automatic alarm judgement.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The structural representation of a kind of audio frequency signal transmission system that Fig. 1 provides for the utility model embodiment.
In figure, 1, on-off circuit, 2, amplifier, 3, controller, 4, warning device, 5, man-machine interaction panel, 6, demodulation filtering circuit, 7, optical fiber input, 8,485 signals inputs, 9, amplifirer, 10, level displaing circuit, 11, LED lamp, 12, charactron, 13, fault and level displaing circuit, 14, LED lamp group.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
Traditional audio frequency signal transmission system is narrow bandwidth signal transmission just as described in the background section, can not be able to not carry out alarm decision to low frequency signal, and accuracy is low.
For addressing the above problem, the utility model embodiment provides a kind of audio frequency signal transmission system, with reference to figure 1, described audio frequency signal transmission system comprises: many barss Acquisition Circuit, on-off circuit 1, amplifier 2, output device, controller 3, warning device 4 and man-machine interaction panel 5.
In the present embodiment, described audio frequency signal transmission system is provided with 8 signal acquisition circuits in parallel, and described signal acquisition circuit comprises: be arranged on and set search coverage, for gathering the sound transducer (figure not shown described sound transducer) of this search coverage acoustic information; Be connected with described sound transducer for described acoustic information being carried out to demodulation and filtering processing, thereby described acoustic information be converted to the demodulation filtering circuit 6 of digital signal.Each signal acquisition circuit is all connected with described controller 3 and amplifier 2 by described on-off circuit 1.
In the present embodiment, described sound transducer is inputted 7 by optical fiber simultaneously and is realized and being connected of described demodulation filtering circuit 6 with 8 two kinds of port connected modes of 485 signals input, in other embodiments, can also adopt any in above-mentioned two kinds of port connected modes to realize the connection between the two.
The switching drive signal that described on-off circuit 1 sends over according to described controller 3, with the signal acquisition circuit conducting of setting, thereby the digital signal of this signal acquisition circuit can be sent to described controller 3 and amplifier 2, the digital signal of the signal acquisition circuit by 3 pairs of described settings of described controller is carried out alarm decision, and the digital signal of the signal acquisition circuit by 2 pairs of described settings of described amplifier is amplified.
Described output device is connected with described amplifier 2, for the digital signal after amplifier 2 is amplified, exports.In the present embodiment, described output device comprises: with described control linkage, amplifirer 9 that the digital signal after amplifying is carried out to voice output; The LED lamp 11 being connected with described amplifier 2 by level displaing circuit 10.
In other embodiments, described output device can only adopt described amplifirer 9 or only adopt the LED lamp 11 being connected with described amplifier 2 by level displaing circuit 10.
Owing to processing through demodulation and filtering, filtering the interfere information in acoustic information, so for low frequency signal, owing to having removed undesired signal, after amplifying, can directly by power amplifier 9 devices or LED etc., export by described amplifier 2, and then security monitoring personnel can carry out alarm decision according to the acoustic information of described amplifirer 9 outputs or the illumination information of described LED lamp, judged whether invader.
Described controller 3 can be single-chip microcomputer, and described controller 3 is connected with each signal acquisition circuit by described on-off circuit 1.Described controller 3 generates described switching drive signal according to the steering order of described man-machine interaction panel 5 inputs, for driving described on-off circuit 1 to make itself and the signal acquisition circuit conducting of setting.
After the signal acquisition circuit conducting of described on-off circuit 1 and setting, described controller 3 obtains the digital signal of the signal acquisition circuit of described setting, and according to described digital signal, the search coverage at the sound transducer place of the signal acquisition circuit of described setting is carried out to alarm decision.When being judged as warning, described controller 3 sends to report to the police and drives signals to be used for driving warning device 4 to report to the police.
Owing to processing through demodulation and filtering, filtering the interfere information in acoustic information, so for low frequency signal, owing to having removed undesired signal, controller 3 also can be identified and low frequency signal is carried out to alarm decision, can detect other low frequency signal.
When carrying out alarm decision, can be by setting minimum reference threshold, controller 3, by described digital signal and described minimum reference threshold are contrasted, when described digital signal is greater than described lowest threshold, can be judged to be warning, thinks and has invader.Owing to can carrying out the identification of low frequency signal, reduced described lowest threshold, improve the accuracy of security alarm.
Described warning device 4 can be audible alarm unit and/or signal lamp warning device.Described warning device 4 is connected with described controller 3 by serial ports.
Described man-machine interaction panel can be keyboard, by keyboard to single-chip microcomputer (controller) input control order, so that signal acquisition circuit and on-off circuit 1 conducting set.Can carry out to described 8 road signal acquisition circuits the numbering of 1-8, by described keyboard input 1-8 during any one numeral, described single-chip microcomputer is controlled signal acquisition circuit and on-off circuit 1 conducting corresponding with this numeral by generating corresponding switching drive signal.
For the ease of observing intuitively current and described on-off circuit 1, to the signal acquisition circuit of conducting, be the signal acquisition circuit of which numbering, an one end can be set to be connected with described controller 3, the charactron 12 that the other end is connected with described man-machine interaction panel 5, the numeral number of the signal acquisition circuit being connected by the current and described on-off circuit of described charactron 12 demonstration.
In order to find in time to open circuit because sound transducer fault causes the signal of respective signal Acquisition Circuit (output signal is 0) or artificial destruction sensor causes the signal of respective signal Acquisition Circuit to open circuit,
Described audio frequency signal transmission system also comprises: LED lamp group 14, described LED lamp group 14 is 8 groups of malfunction indicator lamp, described malfunction indicator lamp connects one to one with described signal acquisition circuit by fault and level displaing circuit 13, when the digital signal of arbitrary bars Acquisition Circuit is less than setting threshold, described fault and level displaing circuit are controlled the malfunction indicator lamp corresponding with described signal acquisition circuit and are opened circuit.
Show state by the LED lamp group corresponding with signal acquisition circuit can judge whether the sound transducer of this signal acquisition circuit breaks down or be considered to destruction like this.
Known by foregoing description, the acoustic information of the corresponding search coverage of each signal acquisition circuit collection of the audio frequency signal transmission system that the present embodiment provides is converted to digital signal through demodulation process, carry out again filtering and process the interfere information in digital signal described in filtering, then by controlling the conducting state of described on-off circuit, on the one hand, can to the digital signal of the signal acquisition circuit of setting, amplify by described amplifier, and by output device, the digital signal after amplifying is exported, security monitoring personnel can carry out alarm decision according to the Output rusults of described output device, due to filtering undesired signal, can prevent that undesired signal is exaggerated and be exported by described output device, so can export low frequency signal, guaranteed the accuracy of reporting to the police, on the other hand, by demodulation and filtering, process, equally also avoided the impact of undesired signal on controller judgement, make controller to carry out automatic alarm judgement to low frequency signal, guaranteed equally the accuracy of automatic alarm judgement.
It should be noted that, in this article, the verb of mentioning " comprises ", those elements or the element step or the existence of step of recording in application documents do not got rid of in " comprising " and paradigmatic use thereof.Article before element " one " or " one " do not get rid of the existence of a plurality of this elements.
Although described spirit of the present invention and principle with reference to some embodiments, but should be appreciated that, the present invention is not limited to disclosed embodiment, the division of each side is not meant that to the feature in these aspects can not combine to be benefited yet, and this division is only the convenience in order to explain.The present invention is intended to contain interior included various modifications and the equivalent arrangements of spirit and scope of claims.The scope of claims meets the most wide in range explanation, thereby comprises all such modifications and equivalent structure and function.
Claims (8)
1. an audio frequency signal transmission system, is characterized in that, comprising:
Many signal acquisition circuits in parallel, described signal acquisition circuit comprises: for gathering the sound transducer of corresponding search coverage acoustic information; For described acoustic information being carried out to be converted to after demodulation and filtering are processed the demodulation filtering circuit of digital signal;
The amplifier being connected with described signal acquisition circuit by on-off circuit, described on-off circuit is according to the signal acquisition circuit conducting of switching drive signal and setting, and described amplifier is for amplifying the digital signal of the signal acquisition circuit of described setting;
Be connected with described amplifier, for the output device that the digital signal after amplifying is exported;
Be connected with described on-off circuit, according to steering order, generate described switching drive signal, for the digital signal of the signal acquisition circuit of described setting being carried out to the controller of alarm decision, when being judged as warning, described controller sends to report to the police and drives signal to be used for driving warning device to report to the police;
For inputting the man-machine interaction panel of described steering order.
2. audio frequency signal transmission system according to claim 1, is characterized in that, also comprises:
8 groups of malfunction indicator lamp, described malfunction indicator lamp connects one to one by fault and level displaing circuit and described signal acquisition circuit, when the digital signal of arbitrary bars Acquisition Circuit is less than setting threshold, described fault and level displaing circuit are controlled the malfunction indicator lamp corresponding with described signal acquisition circuit and are opened circuit.
3. audio frequency signal transmission system according to claim 1, is characterized in that, also comprises:
One end is connected with described controller, the charactron that the other end is connected with described man-machine interaction panel, and described charactron is for showing the numeral number of the signal acquisition circuit of current and described on-off circuit conducting.
4. audio frequency signal transmission system according to claim 1, is characterized in that, described output device is amplifirer.
5. audio frequency signal transmission system according to claim 1, is characterized in that, described output device is the LED lamp being connected with described amplifier by level displaing circuit.
6. audio frequency signal transmission system according to claim 1, is characterized in that, described output device comprises:
Amplifirer with described control linkage;
The LED lamp being connected with described amplifier by level displaing circuit.
7. according to the audio frequency signal transmission system described in claim 1-6 any one, it is characterized in that, described warning device is audible alarm unit and/or signal lamp warning device.
8. according to the audio frequency signal transmission system described in claim 1-6 any one, it is characterized in that, described sound transducer is inputted by optical fiber and/or the input of 485 signals is connected with described demodulation filtering circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320724360.7U CN203535729U (en) | 2013-11-15 | 2013-11-15 | Audio signal transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320724360.7U CN203535729U (en) | 2013-11-15 | 2013-11-15 | Audio signal transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203535729U true CN203535729U (en) | 2014-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320724360.7U Expired - Fee Related CN203535729U (en) | 2013-11-15 | 2013-11-15 | Audio signal transmission system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203535729U (en) |
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2013
- 2013-11-15 CN CN201320724360.7U patent/CN203535729U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140409 Termination date: 20211115 |