CN202059375U - Device for automatic fault detection and hot standby of power amplifier - Google Patents
Device for automatic fault detection and hot standby of power amplifier Download PDFInfo
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- CN202059375U CN202059375U CN2011201625755U CN201120162575U CN202059375U CN 202059375 U CN202059375 U CN 202059375U CN 2011201625755 U CN2011201625755 U CN 2011201625755U CN 201120162575 U CN201120162575 U CN 201120162575U CN 202059375 U CN202059375 U CN 202059375U
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Abstract
The utility model discloses a device for the automatic fault detection and the hot standby of a multi-channel power amplifier, which comprises a signal router forming a plurality of independent channels, a multi-channel digital signal processor, a multi-channel power amplifier and a plurality of loudspeakers, wherein the independent channels are divided into working channels and standby channels. The device for the automatic fault detection and the hot standby of the multi-channel power amplifier also comprises a signal generator for generating a testing signal in each working channel of the digital signal processor, a sound mixer for carrying out sound-mixing processing on an audio signal and the testing signal in each working channel of the digital signal processor, a signal detection unit for respectively and continuously sampling an output signal of each working channel of the power amplifier, a switch switching unit for correspondingly replacing the working channels in which faults occur by the standby channels, and a signal processing and controlling unit for judging the working channels in which the faults occur according to the testing signals sampled by the signal detection unit and controlling the signal router to replace the working channels in which the faults occur by the channels of the digital signal processor on the standby channels.
Description
Technical field
A kind of multi-channel audio power amplifier fault that relates to the utility model automatically detects and the equipment of backup, specifically, relates to and a kind ofly guarantees that sound reinforcement system can stablize that the fault of the multi-channel power amplifier of operate as normal detects automatically and the device of Hot Spare.
Background technology
In hard-wired public address application of arenas and various mobile theatrical performance public address application, need to use a large amount of audio-frequency power amplifiers, satisfy the performance demand to drive various audio amplifier.Because power amplifier often is operated under the high-power state, the power amplifier heating is serious, occurring the part power amplifier easily damages, if a certain power amplifier breaks down, then corresponding audio amplifier will quit work, and in public address is used, often an audio amplifier correspondence covers a public address zone, any one audio amplifier is not worked, and all will cause wherein normally public address of a public address zone, has a strong impact on performing effect.
Can stablize operate as normal in order to ensure sound reinforcement system, equipment major parts such as the source of sound in the public address link, control desk and processor all provide backup functionality, and many equipment are also supported automatic Hot Spare.But in the public address of specialty performance was used, power amplifier was the higher equipment of the rate of breaking down at present, but backup also rests on manual backup, promptly need to reserve the backup power amplifier, when certain power amplifier breaks down, need operating personnel's manual switchover.Adopt this mode, one comes switch operating loaded down with trivial details, need to connect a large amount of circuits, and the operating time is longer, also can cause substantial influence to performance.
The utility model content
At above deficiency, the utility model provides a kind of and has guaranteed that sound reinforcement system can stablize that the fault of the multi-channel power amplifier of operate as normal automatically detects and the device of Hot Spare, when any one power amplifier in the multi-channel power amplifier breaks down, system will be automatically replaces power amplifier in the service aisle that breaks down to the power amplifier in the backup path, to guarantee public address link no-failure operation.
The fault of power amplifier of the present utility model detects automatically and the device of Hot Spare comprises the signal router that is used to form n independent power amplifier channel, the digital signal processor of n passage, power amplifier and n loud speaker of n passage, it is characterized in that, wherein the 1st ~ m power amplifier passage is service aisle, the m ~ n power amplifier passage is backup path, and it also comprises the Hot Spare unit of backup path being replaced the service aisle that breaks down.
Described Hot Spare unit comprises:
Be used in the 1st ~ n of digital signal processor passage, producing the signal generator of test signal;
Be used for respectively audio signal and test signal in each passage of the 1st ~ m passage of digital signal processor are carried out the mixer that audio mixing is handled;
Be used for the detecting signal unit of the test signal of the output signal of the 1st ~ m passage of lasting sampled power amplifier respectively;
The switch switching unit that is used for service aisle that the replacement of backup path correspondence is broken down;
The test signal that is used for adopting according to detecting signal unit is judged the service aisle that breaks down, and the control signal router replaces with one of the passage of the digital signal processor on the alternate channel signal processing and the control unit of the passage of the digital signal processor on the service aisle that breaks down.
Described test signal is not the signal of people's ear institute perception for exceeding the normal hearing upper limit.
The test signal that described signal generator produces can be different, also can be identical, and the signal generator the best here is the sine wave signal generator of 20kHz.
Described detecting signal unit comprises:
Be used for audio signal is carried out isolation processing, to form the isolation coupling unit of sine wave signal;
Be used for the sine wave signal that isolates is carried out the buffering amplifying unit that signal amplifies;
Be used for that the sine wave signal after amplifying is carried out shaping and handle, to form the shaping unit of square-wave signal.
Described signal processing and control unit comprise:
Respectively the sampled signal of each detecting signal unit sample detecting is continued the counter of statistics;
Judge the service aisle that breaks down according to the result of counters count, and the control signal router replaces with one of the passage of the digital signal processor on the alternate channel microprocessor unit of the passage of the digital signal processor on the service aisle that breaks down.
The beneficial effects of the utility model: the utility model is divided into service aisle and backup path by the power amplifier that will be formed with a plurality of autonomous channels, input at each service aisle increases a test signal, respectively the output of the power amplifier on each service aisle is monitored sampling in real time by detecting signal unit then, if the detecting signal unit on each service aisle can continue to detect sampled signal (test signal), then prove the power amplifier operate as normal on this service aisle, if the detecting signal unit on one of them or the several service aisle can not continue to detect sampled signal, power amplifier cisco unity malfunction on this service aisle then is described, then can be by signal processing and control unit and switch switching unit with the corresponding power amplifier of replacing on the service aisle that breaks down of the power amplifier on the backup path, to guarantee that the loud speaker on each original service aisle still can operate as normal; And test signal of the present utility model adopts the sine wave of 20kHz, can not be the perception of people's ear institute, can not influence the effect of overall sound, also is convenient to sample accurately and handle, and accuracy rate is high.
Description of drawings
Fig. 1 is the structure principle chart of the device of automatic detection of the fault of power amplifier of the present utility model and Hot Spare;
Fig. 2 is that schematic diagram is implemented in fault detect of the present utility model;
Fig. 3 is that Hot Spare of the present utility model is implemented schematic diagram;
Fig. 4 is the realization schematic diagram of signal router of the present utility model;
Fig. 5 is the realization schematic diagram of digital signal processor of the present utility model;
Fig. 6 is the realization schematic diagram of switch switching unit of the present utility model;
Fig. 7 is the circuit theory diagrams of the isolation coupling unit of detecting signal unit of the present utility model;
Fig. 8 is the circuit theory diagrams of buffering amplifying unit of the present utility model and square wave shaping unit.
Embodiment
Below in conjunction with accompanying drawing the utility model is further set forth.
As shown in Figure 1, the device of automatic detection of the fault of power amplifier of the present utility model and Hot Spare, it comprises the signal router that is used to form n independent power amplifier channel, the digital signal processor of n passage, power amplifier and n loud speaker of n passage, wherein the 1st ~ m power amplifier passage is service aisle, the m ~ n power amplifier passage is backup path, and it also comprises the Hot Spare unit of backup path being replaced the service aisle that breaks down.
Described Hot Spare unit comprises: the signal generator that is used for producing test signal in the 1st ~ n of digital signal processor passage; Be used for respectively audio signal and test signal in each passage of the 1st ~ m passage of digital signal processor are carried out the mixer that audio mixing is handled; Be used for the detecting signal unit of the test signal of the output signal of the 1st ~ m passage of lasting sampled power amplifier respectively; The switch switching unit that is used for service aisle that the replacement of backup path correspondence is broken down; The test signal that is used for adopting according to detecting signal unit is judged the service aisle that breaks down, and the control signal router replaces with one of the passage of the digital signal processor on the alternate channel signal processing and the control unit of the passage of the digital signal processor on the service aisle that breaks down.
Wherein, above-mentioned test signal is not the signal of people's ear institute perception for exceeding the normal hearing upper limit, and the test signal that increases in each described service aisle can be different, also can be identical, test signal of the present utility model is paid the utmost attention to the sine wave signal into unified 20kHz.
Described detecting signal unit comprises: be used for audio signal is carried out isolation processing, to form the isolation coupling unit of sine wave signal; Be used for the sine wave signal that isolates is carried out the buffering amplifying unit that signal amplifies; Be used for that the sine wave signal after amplifying is carried out shaping and handle, to form the shaping unit of square-wave signal.
Described signal processing and control unit comprise: the counter that respectively sampled signal of each detecting signal unit sample detecting is continued statistics; Judge the service aisle that breaks down according to the result of counters count, and the control signal router replaces with one of the passage of the digital signal processor on the alternate channel microprocessor unit of the passage of the digital signal processor on the service aisle that breaks down.
It is shown in Figure 2 that principle is implemented in fault detect of the present utility model, in the digital signal processor on each passage except that the audio signal processor of routine, increase sine wave signal generator and one 2 * 1 mixer of a 20kHz, the sine wave signal of 20kHz is as the test signal of power amplifier operating state, this signal has exceeded normal person's upper limit of hearing, can be by the perception of people's ear institute.Export to power amplifier jointly behind this signal and the audio input signal audio mixing, signal is output after power amplifier amplifies, the detecting signal unit of feeding simultaneously, detecting signal unit is made up of isolation coupling unit, buffering amplifying unit and square wave shaping unit, detect the sampling test signal by detecting signal unit, and being converted into the square-wave signal output of 20kHz, square-wave signal is exported to the counter of signal processing and control unit, confession detection power amplifier operating state.The operation principle of fault detect is as follows: the counter of signal processing and control unit carries out continuous counter to counter, judge whether to continue the square-wave signal of input 20KHz, as in three cycles (0.05 millisecond of each cycle), all fail to detect square-wave signal, judge that then this power amplifier does not have signal output, thereby judging this power amplifier breaks down, counter adopts the mode of microprocessor software counting to work, extremely short to the failure judgment response time, as being basis for estimation with three detection signal cycles, only 0.15 millisecond of response time is for sound reinforcement system, this time is very short, and people's ear is difficult to discover.
The circuit theory of the isolation coupling unit in the detecting signal unit as shown in Figure 7, it is made up of resistance R 13, capacitor C 43 and transformer T1, this circuit adopts isolating transformer T1 to carry out isolation coupling.
The buffering amplifying unit in the detecting signal unit and the circuit theory of square wave shaping unit are as shown in Figure 8, the function of each element is as follows: U20A and peripheral cell thereof constitute 10 times of amplifiers, detection signal (test signal) is amplified, U20B and peripheral cell constitute comparator, the test signal of sine wave is converted to square-wave signal, exports to microprocessor and count.
The Hot Spare principle of multi-channel power amplifier as shown in Figure 3, this example has n platform power amplifier, its intermediate power amplifier 1 ~ n is a service aisle, power amplifier n is a backup path, when system entered normal operating conditions, audio input signal 1 was exported to digital signal processing circuit 1 through signal router, exported to power amplifier 1 after treatment, switch 1 adhesive (open switch n+1) this moment, the signal after the amplification is exported to power amplification and is exported 1 port (loud speaker 1).When power amplifier 1 breaks down, signal processing and control unit are exported to digital signal processing circuit n with audio input signal 1 through signal router, export to power amplifier n after treatment, this moment, switch 1 was opened, switch n+1 adhesive, like this, the signal after the amplification is still exported to power amplification and is exported 1 port (loud speaker 1), and this operation principle is applicable to that simultaneously a plurality of backup path back up a plurality of service aisles.
Be that example explains with the power amplifier of 8 passages only below, and wherein the 1st ~ 7 passage is service aisle, the 8th passage is a backup path:
As Fig. 4, Fig. 5 and shown in Figure 6, the signal router of the device of automatic detection of the fault of power amplifier of the present utility model and Hot Spare, this example has 8 tunnel inputs and 8 tunnel outputs, 8 road input signals and 8 tunnel output signals are routing configuration arbitrarily, it is made up of the buffer amplifier circuit and the 8*16 switching matrix of 8 passages, 8 passage buffer amplifier circuits are responsible for input signal is cushioned amplification, signal after the amplification is exported to switching matrix, switching matrix is the 8*16 analog switch matrix, 8 the tunnel export to the multi channel signals processor, and 8 passages are exported to signal deteching circuit.Originally be exemplified as 8 channel digital signal processors, signal processing and control unit can dispose the parameter of each digital signal processor in real time according to the operating state of power amplifier, it is by the digital signal processing circuit of 8 passages, 8 passage buffer amplifier circuits, sine wave signal generator and mixer are formed, 8 channel digital signal treatment circuits are responsible for the audio signal of input is carried out equilibrium, processing such as time-delay and compression amplitude limit, sine wave signal generator is used to produce the sine wave signal as the 20kHz of the detection signal of power amplifier operating state, mixer mixes output with sine wave signal and the audio signal of 20kHz, and buffer amplifier circuit is responsible for audio signal is cushioned amplification output.Originally be exemplified as 8 channel power amplifiers, signal processing and control unit can dispose the on off state of each switch according to the operating state of power amplifier.Detecting signal unit is responsible for detecting the operating state of each output power amplifier.Various functions such as the fault detect of the responsible whole device of signal processing and control unit and fault power backup, adopt 32 MCU monolithic computers and EEPROM holder to form, MCU monitors the operating state of each power amplifier in real time, when finding that any power amplifier passage breaks down, to back up switching immediately, the concurrent indication of being out of order.Switch switching unit has 15 switches, is controlled the attracting state of each switch as required in real time by signal processing and control unit.
Operation principle is as follows: after system powers on, whether 8 outputs of signal processing and control unit elder generation sense switch switch unit are in normal operating conditions (promptly do not have open circuit and do not have short circuit), after confirming normally, adhesive switch 1～switch 8, at this moment, power amplifier 1～7 enters operating state, and power amplifier 8 is in Status of Backups, at this moment, the output of No. 8 power amplifiers is connected to 8 inputs of switch switching unit.After system enters operating state, signal processing and control unit detect status input signal and power amplifier output state signal in real time, as the power amplifier that detects the 1st passage breaks down, and signal processing and control unit will transmit control signal immediately to signal router, digital signal processor and switch switching circuit.At first the input signal 1 with signal router is routed to signal output 8, simultaneously all parameters of digital signal processor of the 1st passage are copied to the digital signal processor of the 8th passage, switch 1 and the switch 8 of handling back control switch commutation circuit are off-state, switch 9 is an attracting state, at this moment, the power amplifier of the 8th passage switches to operating state.So far, finish the backup of fault power amplifier 1 is switched, all a series of actions are finished automatically fast by system, and switching time is short, and the power amplifier outside need not to change any connection line, satisfies various public address demands.
The above only is a better embodiment of the present utility model, the utility model is not limited to above-mentioned execution mode, in implementation process, may there be local small structural modification, if various changes of the present utility model or modification are not broken away from spirit and scope of the present utility model, and belong within claim of the present utility model and the equivalent technologies scope, then the utility model also is intended to comprise these changes and modification.
Claims (6)
1. the fault of a power amplifier automatically detects and the device of Hot Spare, it comprises the signal router that is used to form n independent power amplifier channel, the digital signal processor of n passage, power amplifier and n loud speaker of n passage, it is characterized in that, wherein the 1st ~ m power amplifier passage is service aisle, the m ~ n power amplifier passage is backup path, and it also comprises the Hot Spare unit of backup path being replaced the service aisle that breaks down.
2. the fault of power amplifier according to claim 1 automatically detects and the device of Hot Spare, it is characterized in that described Hot Spare unit comprises:
Be used in the 1st ~ n of digital signal processor passage, producing the signal generator of test signal;
Be used for respectively audio signal and test signal in each passage of the 1st ~ m passage of digital signal processor are carried out the mixer that audio mixing is handled;
Be used for the detecting signal unit of the test signal of the output signal of the 1st ~ m passage of lasting sampled power amplifier respectively;
The switch switching unit that is used for service aisle that the replacement of backup path correspondence is broken down;
The test signal that is used for adopting according to detecting signal unit is judged the service aisle that breaks down, and the control signal router replaces with one of the passage of the digital signal processor on the alternate channel signal processing and the control unit of the passage of the digital signal processor on the service aisle that breaks down.
3. the device of automatic detection of the fault of power amplifier according to claim 2 and Hot Spare is characterized in that described test signal is not the signal of people's ear institute perception for exceeding the normal hearing upper limit.
4. the fault of power amplifier according to claim 3 automatically detects and the device of Hot Spare, it is characterized in that, the test signal that described signal generator produces can be different, also can be identical, and the signal generator the best here is the sine wave signal generator of 20kHz.
5. the fault of power amplifier according to claim 4 automatically detects and the device of Hot Spare, it is characterized in that described detecting signal unit comprises:
Be used for audio signal is carried out isolation processing, to form the isolation coupling unit of sine wave signal;
Be used for the sine wave signal that isolates is carried out the buffering amplifying unit that signal amplifies;
Be used for that the sine wave signal after amplifying is carried out shaping and handle, to form the shaping unit of square-wave signal.
6. the fault of power amplifier according to claim 5 automatically detects and the device of Hot Spare, it is characterized in that described signal processing and control unit comprise:
Respectively the sampled signal of each detecting signal unit sample detecting is continued the counter of statistics;
Judge the service aisle that breaks down according to the result of counters count, and the control signal router replaces with one of the passage of the digital signal processor on the alternate channel microprocessor unit of the passage of the digital signal processor on the service aisle that breaks down.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011201625755U CN202059375U (en) | 2011-05-20 | 2011-05-20 | Device for automatic fault detection and hot standby of power amplifier |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011201625755U CN202059375U (en) | 2011-05-20 | 2011-05-20 | Device for automatic fault detection and hot standby of power amplifier |
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| CN102231621A (en) * | 2011-05-20 | 2011-11-02 | 广州励丰声光科技有限公司 | Hot backup method and hot backup device for multi-channel power amplifier |
| CN103207364A (en) * | 2012-01-12 | 2013-07-17 | 延锋伟世通汽车电子有限公司 | Automatic detection system of automotive audio power amplifier |
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- 2011-05-20 CN CN2011201625755U patent/CN202059375U/en not_active Expired - Lifetime
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| CN102231621A (en) * | 2011-05-20 | 2011-11-02 | 广州励丰声光科技有限公司 | Hot backup method and hot backup device for multi-channel power amplifier |
| CN103207364A (en) * | 2012-01-12 | 2013-07-17 | 延锋伟世通汽车电子有限公司 | Automatic detection system of automotive audio power amplifier |
| CN103207364B (en) * | 2012-01-12 | 2016-08-03 | 延锋伟世通汽车电子有限公司 | A kind of automatic checkout system of automotive audio power amplifier |
| CN103872996A (en) * | 2012-12-07 | 2014-06-18 | 京信通信系统（中国）有限公司 | Multichannel circuit of base station power amplifier and control method of multichannel circuit |
| CN103872996B (en) * | 2012-12-07 | 2017-06-23 | 京信通信系统（中国）有限公司 | The multi-channel circuit and its control method of base station power amplifier |
| CN103916144B (en) * | 2013-01-05 | 2016-09-28 | 北京北广科技股份有限公司 | Very low frequency long-wave transmitter power amplifier unit self-adapting correction method and device |
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| CN106160679A (en) * | 2015-04-08 | 2016-11-23 | 钟武清 | A kind of professional audio amplifier |
| CN105307097A (en) * | 2015-10-09 | 2016-02-03 | 湖南康通电子科技有限公司 | Online monitoring method for audio power amplifier and system thereof |
| CN108419199A (en) * | 2017-02-10 | 2018-08-17 | 阿里巴巴集团控股有限公司 | Fault detection method, device and the equipment of acoustic signals, readable medium |
| CN107659883A (en) * | 2017-09-12 | 2018-02-02 | 中兴通讯股份有限公司 | A kind of audio system management method and device, computer-readable recording medium |
| CN107708039A (en) * | 2017-09-30 | 2018-02-16 | 努比亚技术有限公司 | Control method, mobile terminal and the computer-readable recording medium of voicefrequency circuit |
| CN107947745B (en) * | 2017-12-12 | 2018-09-25 | 江苏海湾电气科技有限公司 | Audio-frequency power amplifier with self-checking function |
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| CN114727187A (en) * | 2022-04-02 | 2022-07-08 | 头领科技（昆山）有限公司 | Audio output device state detection chip and earphone |
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| CP01 | Change in the name or title of a patent holder |
Address after: 885 A410 room, Shenzhou Road, Science Town, Guangzhou hi tech Industrial Development Zone, Guangdong 510663, China Patentee after: Guangzhou Leafun Culture Technology Co., Ltd. Address before: 885 A410 room, Shenzhou Road, Science Town, Guangzhou hi tech Industrial Development Zone, Guangdong 510663, China Patentee before: Guangzhou Leafun Acoustic-Optic Technology Co.,Ltd. |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20111130 Effective date of abandoning: 20140226 |
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| RGAV | Abandon patent right to avoid regrant |