CN106488378A - A kind of speaker loop state detection means - Google Patents
A kind of speaker loop state detection means Download PDFInfo
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- CN106488378A CN106488378A CN201611260748.0A CN201611260748A CN106488378A CN 106488378 A CN106488378 A CN 106488378A CN 201611260748 A CN201611260748 A CN 201611260748A CN 106488378 A CN106488378 A CN 106488378A
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- speaker
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- 238000001514 detection method Methods 0.000 title claims abstract description 26
- 238000002955 isolation Methods 0.000 claims abstract description 8
- 238000004804 winding Methods 0.000 claims description 9
- 238000011897 real-time detection Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 2
- 238000012952 Resampling Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R29/00—Monitoring arrangements; Testing arrangements
- H04R29/001—Monitoring arrangements; Testing arrangements for loudspeakers
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The invention discloses a kind of speaker loop state detection means, including：Speaker loop, DC voltage module, compare output module, photoelectric isolation module, divider resistance and detection main frame；Speaker loop includes audio input end, capacitance CA1, capacitance CA2 and multiple speaker；The positive pole of multiple speakers, one end of DC voltage module, one end of divider resistance and compare the positive input of output module and all connected by CA1 and the first audio input end, the negative pole of multiple speakers, the other end of DC voltage module, the other end of divider resistance and compare the reverse input end of output module and all pass through CA2 and the connection of the second audio input end.It is an advantage of the current invention that according to the magnitude of voltage comparing on speaker loop and default reference voltage, accurately detection speaker loop state, and can in urgent broadcast and non-emergent broadcast real-time detection, there is advantage with low cost simultaneously.
Description
Technical field
The present invention relates to a kind of speaker loop state detection means.
Background technology
In fire emergence evacuation broadcast system, the scope that broadcast message is issued is big and distance is remote, on a speaker loop,
Multiple speakers often to be connected, the distance in this loop sometimes can reach hundreds of upper km, could meet the need of fire-fighting emergent
Ask；In order to solve long-distance transmissions, the output voltage of power amplifier typically can bring up to 100V, uploads in speaker loop
The audio signal of defeated 100V.
The short circuit in speaker loop and open circuit detection, are key functions of fire emergence evacuation broadcast system, existing do
Method is after installation and debugging finish, and the impedance to whole loop and speaker is once sampled, after by Single-chip Controlling, regularly
Impedance to loop and speaker detects, then detected value and sampled value before is contrasted to judge loop state, this
Plant detection mode and there are some problems：1) troublesome poeration, change every time circuit or increased and decreased speaker will resampling.2)
It is unable to the reflection speaker loop state of entirely accurate, if having a small amount of speaker near circuit end, and loop is at these
Break before speaker, this detection mode is possible to can't detect.3) asking of loop detection can not be carried out in urgent broadcast
Topic.
Content of the invention
In order to overcome the deficiencies in the prior art, it is an object of the invention to provide a kind of speaker loop state detection dress
Put, it can solve the problems, such as the inconvenience of the detection of the state in speaker loop.
The purpose of the present invention employs the following technical solutions realization：
A kind of speaker loop state detection means, including：Speaker loop, DC voltage module, compare output module,
Photoelectric isolation module, divider resistance R and detection main frame；Speaker loop include audio input end, capacitance CA1, every directly electricity
Hold CA2 and multiple speaker, audio input end includes the first audio input end and the second audio input end；
The positive pole of multiple speakers, one end of DC voltage module, one end of divider resistance R and just compare output module
All connected by capacitance CA1 and the first audio input end to input, the negative pole of multiple speakers, DC voltage module
The other end, the other end of divider resistance R and compare the reverse input end of output module all by capacitance CA2 and the second audio frequency
Input connects；The outfan of relatively output module passes through photoelectric isolation module and detection main frame connects.
Preferably, described speaker includes positive pole, negative pole, capacitance C1, audio-frequency transformer L1 and loudspeaker, audio frequency becomes
One end of the armature winding of depressor L1 passes through capacitance C1 and positive pole connects, the other end of the armature winding of audio-frequency transformer L1
Connect with negative pole, the secondary windings of audio-frequency transformer L1 and loudspeaker connect.
Preferably, described divider resistance R is connected in parallel on the positive pole and negative pole of the farthest speaker of audio input end.
Compared to existing technology, the beneficial effects of the present invention is：According to the magnitude of voltage comparing on speaker loop and default
Reference voltage, accurately detection speaker loop state, and can in urgent broadcast and non-emergent broadcast real-time detection, with
When there is advantage with low cost.
Brief description
Fig. 1 is the circuit connection diagram of the detection means of the present invention；
Fig. 2 is the circuit connection diagram of the speaker of the present invention.
Specific embodiment
Below, in conjunction with accompanying drawing and specific embodiment, the present invention is described further：
A kind of speaker loop state detection means, as shown in figure 1, include：Speaker loop, DC voltage module, ratio
Compared with output module, photoelectric isolation module, divider resistance R and detection main frame.Speaker loop includes audio input end, capacitance
CA1, capacitance CA2 and multiple speaker (S1, S2 ... Sn), audio input end includes the first audio input end and second
Audio input end.
The positive pole of multiple speakers, one end of DC voltage module and compare the positive input of output module all by every
Straight electric capacity CA1 and the first audio input end connect, the negative pole of multiple speakers, the other end of DC voltage module and compare output
The reverse input end of module is all connected by capacitance CA2 and the second audio input end；The outfan of relatively output module leads to
Cross photoelectric isolation module and detection main frame connects；Divider resistance R is connected in parallel on the positive pole apart from the farthest speaker of audio input end
On negative pole.
As shown in Fig. 2 described speaker includes positive pole, negative pole, capacitance C1, audio-frequency transformer L1 and loudspeaker, audio frequency
One end of the armature winding of transformator L1 is passed through capacitance C1 and positive pole and is connected, the armature winding of audio-frequency transformer L1 another
End and negative pole connect, and the secondary windings of audio-frequency transformer L1 and loudspeaker connect.
The operation principle of this detection means is：On speaker loop, a DC voltage module in parallel, makes DC voltage
Module applies DC voltage as detectable voltage signals, compares the voltage that output module detects divider resistance R two ends, and with default
Reference voltage be compared output comparison signal, comparison signal by photoelectric isolation module send to detection main frame, detection master
Machine judges the state in speaker loop according to comparison signal.
Described comparison signal includes two paths of signals：First comparing signals A 0 and the second comparing signals A 1；When first compares letter
Number and when the second comparison signal is low level, speaker loop is normal；When the first comparison signal is high level, and the second ratio
During compared with signal for low level, open a way in speaker loop；When the first comparison signal is low level, and the second comparison signal is high electricity
At ordinary times, speaker loop short circuit.
The capacitance C1 of speakers built can filter the DC voltage of detectable voltage signals, it is to avoid detectable voltage signals
The audio signal of interference speaker.
This device may be used on the 100V speaker loop of power amplifier output, and this device operation and installation is simple, increases
Subtract speaker and will not produce impact to condition adjudgement, speaker loop state can be accurately reflected, and can in urgent broadcast and
Real-time detection during non-emergent broadcast, has advantage with low cost simultaneously.
It will be apparent to those skilled in the art that can technical scheme as described above and design, make other various
Corresponding change and deformation, and all these change and deformation all should belong to the protection domain of the claims in the present invention
Within.
Claims (3)
1. a kind of speaker loop state detection means is it is characterised in that including speaker loop, DC voltage module, comparing
Output module, photoelectric isolation module, divider resistance R and detection main frame；Speaker loop includes audio input end, capacitance
CA1, capacitance CA2 and multiple speaker, audio input end includes the first audio input end and the second audio input end；
The positive pole of multiple speakers, one end of DC voltage module, one end of divider resistance R and compare output module forward direction defeated
Enter end all pass through capacitance CA1 and the first audio input end connection, the negative pole of multiple speakers, DC voltage module another
End, the other end of divider resistance R and compare the reverse input end of output module all by capacitance CA2 and the second audio input
End connects；The outfan of relatively output module passes through photoelectric isolation module and detection main frame connects.
2. device as claimed in claim 1 is it is characterised in that described speaker includes positive pole, negative pole, capacitance C1, sound
Frequency power transformer L1 and loudspeaker, one end of the armature winding of audio-frequency transformer L1 passes through capacitance C1 and positive pole connects, and audio frequency becomes
The other end of the armature winding of depressor L1 and negative pole connect, and the secondary windings of audio-frequency transformer L1 and loudspeaker connect.
3. device as claimed in claim 1 it is characterised in that described divider resistance R be connected in parallel on farthest apart from audio input end
The positive pole and negative pole of speaker on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611260748.0A CN106488378A (en) | 2016-12-30 | 2016-12-30 | A kind of speaker loop state detection means |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611260748.0A CN106488378A (en) | 2016-12-30 | 2016-12-30 | A kind of speaker loop state detection means |
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| Publication Number | Publication Date |
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| CN106488378A true CN106488378A (en) | 2017-03-08 |
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| CN201611260748.0A Pending CN106488378A (en) | 2016-12-30 | 2016-12-30 | A kind of speaker loop state detection means |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107172558A (en) * | 2017-06-08 | 2017-09-15 | 浙江工业大学 | A kind of novel horn fault detection method |
| CN109429139A (en) * | 2017-08-24 | 2019-03-05 | 霍尼韦尔腾高电子***（广州）有限公司 | Real-time and non real-time detection method, device and the broadcast system of loudspeaker subregion |
| CN110350473A (en) * | 2018-04-03 | 2019-10-18 | 中兴通讯股份有限公司 | A kind of control circuit, method and device |
| CN110996243A (en) * | 2019-12-16 | 2020-04-10 | 广州市迪士普音响科技有限公司 | Loudspeaker on-line detection system |
| CN112218223A (en) * | 2020-10-30 | 2021-01-12 | 四川久远智能消防设备有限责任公司 | Differential constant-voltage audio output bus loudspeaker disconnection detection circuit |
| CN112770244A (en) * | 2020-12-22 | 2021-05-07 | 北京城建智控科技有限公司 | Method and device for detecting line fault of loudspeaker and audio playing equipment |
| WO2022156153A1 (en) * | 2021-01-19 | 2022-07-28 | 广州市保伦电子有限公司 | Remote broadcast line detection apparatus |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107172558A (en) * | 2017-06-08 | 2017-09-15 | 浙江工业大学 | A kind of novel horn fault detection method |
| CN109429139A (en) * | 2017-08-24 | 2019-03-05 | 霍尼韦尔腾高电子***（广州）有限公司 | Real-time and non real-time detection method, device and the broadcast system of loudspeaker subregion |
| CN109429139B (en) * | 2017-08-24 | 2021-06-15 | 霍尼韦尔腾高电子***（广州）有限公司 | Real-time and non-real-time detection method and device for loudspeaker partition and broadcasting system |
| CN110350473A (en) * | 2018-04-03 | 2019-10-18 | 中兴通讯股份有限公司 | A kind of control circuit, method and device |
| CN110996243A (en) * | 2019-12-16 | 2020-04-10 | 广州市迪士普音响科技有限公司 | Loudspeaker on-line detection system |
| CN112218223A (en) * | 2020-10-30 | 2021-01-12 | 四川久远智能消防设备有限责任公司 | Differential constant-voltage audio output bus loudspeaker disconnection detection circuit |
| CN112770244A (en) * | 2020-12-22 | 2021-05-07 | 北京城建智控科技有限公司 | Method and device for detecting line fault of loudspeaker and audio playing equipment |
| WO2022156153A1 (en) * | 2021-01-19 | 2022-07-28 | 广州市保伦电子有限公司 | Remote broadcast line detection apparatus |
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Application publication date: 20170308 |