CN110972052A - Audio self-checking circuit and self-checking method - Google Patents
Audio self-checking circuit and self-checking method Download PDFInfo
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- CN110972052A CN110972052A CN201911239884.5A CN201911239884A CN110972052A CN 110972052 A CN110972052 A CN 110972052A CN 201911239884 A CN201911239884 A CN 201911239884A CN 110972052 A CN110972052 A CN 110972052A
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000004458 analytical method Methods 0.000 claims abstract description 16
- 238000004364 calculation method Methods 0.000 claims abstract description 8
- 230000003321 amplification Effects 0.000 claims description 12
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 12
- 238000001228 spectrum Methods 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 238000012360 testing method Methods 0.000 claims description 4
- 238000010998 test method Methods 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract description 2
- 230000005236 sound signal Effects 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 2
- 206010049418 Sudden Cardiac Death Diseases 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 208000019622 heart disease Diseases 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
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- 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
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/38—Applying electric currents by contact electrodes alternating or intermittent currents for producing shock effects
- A61N1/39—Heart defibrillators
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10527—Audio or video recording; Data buffering arrangements
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10527—Audio or video recording; Data buffering arrangements
- G11B2020/10537—Audio or video recording
- G11B2020/10546—Audio or video recording specifically adapted for audio data
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- Heart & Thoracic Surgery (AREA)
- Biomedical Technology (AREA)
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Abstract
The invention discloses an audio self-checking circuit and a self-checking method, comprising a signal generating unit, a playback circuit, a playback device, a pickup device, a recording circuit and a signal analyzing unit, wherein the signal generating unit is used for generating a sound signal; the signal generating unit generates a preset playback signal with a specific data format, the preset playback signal is transmitted to the playback circuit to be processed and amplified, then the playback device is driven to play sound, the pickup device collects the sound played by the playback device and transmits the sound to the recording circuit to be processed and converted, and then the signal analyzing unit analyzes the sound to obtain an analyzed data format; and judging whether the audio circuit is normal or not by comparing whether the analyzed data format is consistent with the data format of the preset playback signal or not. The invention can simultaneously implement self-checking to the playback circuit and the recording circuit, thereby realizing the closed-loop detection of the system; the self-checking signal of a specific data format is adopted, so that the sensitivity and specificity of voice analysis are improved, the calculation complexity of the voice analysis is reduced, and the self-checking reliability and timeliness are improved.
Description
Technical Field
The invention belongs to the technical field of automatic external defibrillators, and particularly relates to an audio self-checking circuit and a self-checking method.
Background
The american heart disease association (AHA) has long established that Automated External Defibrillators (AEDs) are the most effective means of achieving rapid electrical defibrillation therapy after sudden cardiac death. The key feature of AED is that it is used for many thousands of days, so self-test is very important for AED. The audio is the key function of the AED to play the role of emergency treatment, including playing the audio to guide the operator to operate, and recording the audio to record the rescue process on site, so the audio self-check is very important for the AED.
The conventional self-checking method of the audio circuit system is to independently self-check the playback and the recording, and only can detect the circuit layer, for example, the paper cone of a playback device is damaged and can not play the sound, and can not be detected; the sound pick-up film of the recording self-test is damaged, so that the recording can not be carried out, and the sound pick-up film can not be detected. Even if closed-loop self-checking is expected to be carried out on playback and recording, the real voice signal has rich frequency spectrum, the voice recognition technology is complex, the calculated amount is large, and the processor resource of the defibrillator is difficult to realize.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the problems, the invention provides an audio self-checking circuit and a self-checking method, which can realize reliable and comprehensive audio circuit self-checking.
The technical scheme is as follows: in order to realize the purpose of the invention, the technical scheme adopted by the invention is as follows: an audio self-checking circuit comprises a signal generating unit, a playback circuit, a playback device, a pickup device, a recording circuit and a signal analyzing unit; the output of the signal generating unit is connected with the playback circuit, the output of the playback circuit is connected with the playback device, the pickup device collects signals sent by the playback device and transmits the signals to the recording circuit, and the output of the recording circuit is transmitted to the signal analyzing unit.
A self-checking method of an audio circuit comprises the following steps:
(1) the signal generating unit outputs a preset playback signal with a specific data format and transmits the preset playback signal to the playback circuit;
(2) the playback circuit processes and amplifies a preset voice signal and drives a playback device to play sound;
(3) the sound pickup device collects the sound played by the sound playing device and transmits the sound to the recording circuit for processing and conversion;
(4) the signal analysis unit analyzes the signal transmitted by the recording circuit to obtain the data format of the signal;
(5) and comparing whether the analyzed data format is consistent with the data format of the preset playback signal, if so, the self-checking of the audio circuit is normal, and if not, the self-checking of the audio circuit is failed.
Further, in the step 2, if the signal generation unit outputs an analog signal, the playback circuit filters and amplifies a preset voice signal; if the signal generating unit outputs digital signals, the playback circuit performs digital-to-analog conversion, filtering and amplification on the preset voice signals.
Further, in step 3, if the signal analysis unit needs to receive the analog signal, the recording circuit filters and amplifies the signal transmitted by the sound pickup device; if the signal analysis unit needs to receive the digital signal, the recording circuit filters, amplifies and converts the analog signal transmitted by the pickup device.
Further, in the step 5, the comparison calculation process is as follows: presetting the amplitude of a voice signal to be A0 and the frequency to be F0, carrying out amplitude amplification on the signal transmitted by the signal generating unit by A1 times by the sound reproduction circuit, carrying out frequency spectrum shift to be F1Hz, attenuating the amplitude of the sound reproduction device to be 1/A2 by the sound pickup device, carrying out frequency spectrum shift to be F2Hz, carrying out amplitude amplification on the signal transmitted by the sound pickup device by A3 times by the sound recording circuit, and carrying out frequency spectrum shift to be F3 Hz; the amplitude of the analyzed signal is AX, and the frequency is FX; then the inverse calculation is performed on the analyzed signal, and the amplitude: AX/A3 a2/a1, frequency: FX + F3+ F2+ F1; compare A0 with AX, F0 with FX.
Has the advantages that: the invention realizes the closed loop detection of the system by simultaneously implementing self-checking on the playback circuit and the recording circuit; the self-checking signal of a specific data format is adopted, so that the sensitivity and specificity of voice analysis are improved, the calculation complexity of the voice analysis is reduced, and the self-checking reliability and timeliness are improved.
Drawings
FIG. 1 is a schematic block diagram of an audio self-test circuit;
fig. 2 is a flow chart of a self-test method of an audio circuit.
Detailed Description
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
As shown in fig. 1, the audio self-checking circuit of the present invention includes a signal generating unit 11, a playback circuit 12, a playback device 13, a sound collecting device 14, a recording circuit 15, and a signal analyzing unit 16. The output of the signal generating unit 11 is connected with a playback circuit 12, the output of the playback circuit 12 is connected with a playback device 13, a sound collecting device 14 collects the signals sent by the playback device 13 and transmits the signals to a recording circuit 15, and the output of the recording circuit 15 is transmitted to a signal analyzing unit 16.
As shown in fig. 2, the audio circuit self-test method of the present invention includes the steps of:
s21 the signal generating unit outputs a preset playback signal of a specific data format, which is generated to encode the frequency, amplitude and phase of the signal.
For example, a signal with a single frequency and a single amplitude, such as a sinusoidal signal with a frequency of 1KHz and an amplitude of 1Vpp, is used; or signals of multiple frequencies and multiple amplitudes, such as a sinusoidal signal with a frequency of 1KHz and an amplitude of 1Vpp and a sinusoidal signal with a frequency of 100Hz and an amplitude of 0.5 Vpp. Or modulating the sinusoidal signal with the frequency of 1KHz and the amplitude of 1Vpp by adopting frequency modulation, such as the sinusoidal signal with the frequency of 100 Hz; or amplitude modulation, for example, a sinusoidal signal with an amplitude of 0.5Vpp, at a frequency of 1KHz and an amplitude of 1 Vpp. The purpose of the modulation is to improve the sensitivity and specificity of the speech analysis.
[ S22] the playback circuit processes and amplifies a preset voice signal. If the signal generating unit generates an analog signal, the playback circuit performs filtering and amplification; if the signal generating unit outputs digital signals, the playback circuit performs digital-to-analog conversion, filtering and amplification.
Filtering is used to filter out circuit and environment induced interference, such as by band pass filtering with a bandwidth in the range of 20Hz to 20KHz, for filtering out sounds inaudible to the human ear. Amplification is used to power amplify the input signal to drive the sound reproducing device, for example to 0.5W, to meet the power specifications of the defibrillator.
[ S23] the playback device is driven to play sound. The playback device receives the driving signal from the playback circuit and plays the sound.
[ S24] the sound pickup device picks up sound played by the sound playing device.
S25 the sound pickup device transmits the collected sound signal to the recording circuit for processing and conversion.
If the signal analysis unit needs to receive the analog signal, the recording circuit filters and amplifies the signal transmitted by the pickup device; if the signal analysis unit needs to receive the digital signal, the recording circuit filters, amplifies and converts the analog signal transmitted by the pickup device.
Filtering is used to filter out circuit and environment induced interference, such as band pass filtering with bandwidth ranging from 20Hz to 20KHz, for filtering out sounds outside the range of human hearing. The amplification is used for carrying out voltage amplification on the input signal so as to facilitate back-end analysis and improve the anti-noise capability.
[ S26] the signal analysis unit analyzes the signal transmitted by the recording circuit to obtain the data format of the signal. The analysis process includes demodulating the modulated signal and extracting frequency, amplitude and phase data of the signal.
(S27) comparing the analyzed data format with the preset playback signal data format to determine whether the playback circuit, playback device, pickup device and recording circuit are normal.
The comparison process can calculate the processes of signal amplification, attenuation, spectrum conversion and the like of the playback circuit, the recording circuit and the transmission environment in the transmission process. The preset signal amplitude is A0, the frequency is F0, the sound reproduction circuit 12 amplifies the signal transmitted by the signal generation unit 11 by A1 times, the frequency spectrum is shifted by F1Hz, the sound pickup device 14 attenuates the amplitude of the sound reproduction device 13 to 1/A2, the frequency spectrum is shifted by F2Hz, the sound recording circuit 15 amplifies the signal transmitted by the sound pickup device 14 by A3 times, and the frequency spectrum is shifted by F3 Hz. The amplitude of the resolved signal is AX and the frequency is FX. Then the inverse calculation is performed on the analyzed signal, and the amplitude: AX/A3 a2/a1, frequency: FX + F3+ F2+ F1. Compare A0 with AX, F0 with FX.
Because the data specification of the preset playback signal is known, including frequency, amplitude and phase, during calculation and comparison, data near the data specification of the preset playback signal can be intensively calculated and compared, for example, for a sinusoidal signal with the preset playback signal frequency of 1KHz and the amplitude of 1Vpp, only the sinusoidal signal with the preset playback signal frequency of 1KHz and the amplitude of 1Vpp is calculated and compared.
(S28) obtaining a conclusion according to the comparison result, if the analyzed data format is consistent with the data format of the preset playback signal, the audio circuit is normal; and if the analyzed data format is inconsistent with the data format of the preset playback signal, the audio circuit fails.
Claims (5)
1. An audio self-checking circuit is characterized by comprising a signal generating unit (11), a playback circuit (12), a playback device (13), a pickup device (14), a recording circuit (15) and a signal analyzing unit (16);
the output of the signal generating unit (11) is connected with a playback circuit (12), the output of the playback circuit (12) is connected with a playback device (13), a sound pickup device (14) collects signals sent by the playback device (13) and transmits the signals to a recording circuit (15), and the output of the recording circuit (15) transmits the signals to a signal analyzing unit (16).
2. A method for self-testing an audio circuit, comprising the steps of:
(1) the signal generating unit outputs a preset playback signal with a specific data format and transmits the preset playback signal to the playback circuit;
(2) the playback circuit processes and amplifies a preset voice signal and drives a playback device to play sound;
(3) the sound pickup device collects the sound played by the sound playing device and transmits the sound to the recording circuit for processing and conversion;
(4) the signal analysis unit analyzes the signal transmitted by the recording circuit to obtain the data format of the signal;
(5) and comparing whether the analyzed data format is consistent with the data format of the preset playback signal, if so, the self-checking of the audio circuit is normal, and if not, the self-checking of the audio circuit is failed.
3. The audio circuit self-checking method according to claim 2, wherein in the step 2, if the signal generating unit outputs an analog signal, the playback circuit filters and amplifies a preset voice signal; if the signal generating unit outputs digital signals, the playback circuit performs digital-to-analog conversion, filtering and amplification on the preset voice signals.
4. The audio circuit self-test method of claim 2, wherein in the step 3, if the signal analysis unit needs to receive the analog signal, the recording circuit filters and amplifies the signal transmitted by the pickup device; if the signal analysis unit needs to receive the digital signal, the recording circuit filters, amplifies and converts the analog signal transmitted by the pickup device.
5. The audio circuit self-checking method of claim 2, wherein in the step 5, the comparison calculation process is: presetting the amplitude of a voice signal to be A0 and the frequency to be F0, carrying out amplitude amplification on the signal transmitted by the signal generating unit by A1 times by the sound reproduction circuit, carrying out frequency spectrum shift to be F1Hz, attenuating the amplitude of the sound reproduction device to be 1/A2 by the sound pickup device, carrying out frequency spectrum shift to be F2Hz, carrying out amplitude amplification on the signal transmitted by the sound pickup device by A3 times by the sound recording circuit, and carrying out frequency spectrum shift to be F3 Hz; the amplitude of the analyzed signal is AX, and the frequency is FX; then the inverse calculation is performed on the analyzed signal, and the amplitude: AX/A3 a2/a1, frequency: FX + F3+ F2+ F1; compare A0 with AX, F0 with FX.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911239884.5A CN110972052A (en) | 2019-12-06 | 2019-12-06 | Audio self-checking circuit and self-checking method |
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| CN201911239884.5A CN110972052A (en) | 2019-12-06 | 2019-12-06 | Audio self-checking circuit and self-checking method |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6140519A (en) * | 1984-08-01 | 1986-02-26 | Matsushita Electric Ind Co Ltd | Apparatus for measuring sound field |
| CN1489283A (en) * | 2003-08-12 | 2004-04-14 | 余小宁 | High fidelity audio signal amplifying method |
| CN2836166Y (en) * | 2005-09-22 | 2006-11-08 | 上海宝钢设备检修有限公司 | Listening device |
| CN101370000A (en) * | 2008-10-17 | 2009-02-18 | 北京星河亮点通信软件有限责任公司 | Multi-carrier implementing method and apparatus for TD-SCDMA system |
| CN104485117A (en) * | 2014-12-16 | 2015-04-01 | 福建星网视易信息***有限公司 | Method and system for detecting sound recording equipment |
| CN106488376A (en) * | 2016-10-28 | 2017-03-08 | 努比亚技术有限公司 | The method and apparatus that a kind of audio components to mobile terminal carry out fault diagnosis |
| CN109362016A (en) * | 2018-09-18 | 2019-02-19 | 北京小鸟听听科技有限公司 | Audio-frequence player device and its test method and test device |
| CN109623877A (en) * | 2019-01-21 | 2019-04-16 | 广州高新兴机器人有限公司 | Self checking method, self-checking system and the computer storage medium of robot |
| CN111050265A (en) * | 2019-11-27 | 2020-04-21 | 深圳易科声光科技股份有限公司 | Automatic audio link detection method and device |
-
2019
- 2019-12-06 CN CN201911239884.5A patent/CN110972052A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6140519A (en) * | 1984-08-01 | 1986-02-26 | Matsushita Electric Ind Co Ltd | Apparatus for measuring sound field |
| CN1489283A (en) * | 2003-08-12 | 2004-04-14 | 余小宁 | High fidelity audio signal amplifying method |
| CN2836166Y (en) * | 2005-09-22 | 2006-11-08 | 上海宝钢设备检修有限公司 | Listening device |
| CN101370000A (en) * | 2008-10-17 | 2009-02-18 | 北京星河亮点通信软件有限责任公司 | Multi-carrier implementing method and apparatus for TD-SCDMA system |
| CN104485117A (en) * | 2014-12-16 | 2015-04-01 | 福建星网视易信息***有限公司 | Method and system for detecting sound recording equipment |
| CN106488376A (en) * | 2016-10-28 | 2017-03-08 | 努比亚技术有限公司 | The method and apparatus that a kind of audio components to mobile terminal carry out fault diagnosis |
| CN109362016A (en) * | 2018-09-18 | 2019-02-19 | 北京小鸟听听科技有限公司 | Audio-frequence player device and its test method and test device |
| CN109623877A (en) * | 2019-01-21 | 2019-04-16 | 广州高新兴机器人有限公司 | Self checking method, self-checking system and the computer storage medium of robot |
| CN111050265A (en) * | 2019-11-27 | 2020-04-21 | 深圳易科声光科技股份有限公司 | Automatic audio link detection method and device |
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