CN101625861A - Speech detecting instrument independent of air conduction - Google Patents
Speech detecting instrument independent of air conduction Download PDFInfo
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- CN101625861A CN101625861A CN200910023558A CN200910023558A CN101625861A CN 101625861 A CN101625861 A CN 101625861A CN 200910023558 A CN200910023558 A CN 200910023558A CN 200910023558 A CN200910023558 A CN 200910023558A CN 101625861 A CN101625861 A CN 101625861A
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Abstract
The invention discloses a speech detecting instrument independent of air conduction. A dot frequency millimeter wave phase controlled oscillator generates radar waves which are converted to two ways by a directional couplet; one way of radar waves are sent to an antenna and the other way of radar waves are attenuated, balanced and mixed with radar echo signals from a circulator, amplified by signals and filtered to obtain speech or other broad spectrum acoustics signals. A millimeter wave radar detects speech signals, which has the advantages which a plurality of air conduction speech detection methods do not have; as the system has the advantages of non-contact, safety, real time, convenient carrying, low cost and the like; therefore, the technique breakthroughs the traditional voice detection mode using an acoustic sensor and air as medium, thus greatly expanding application thereof, having extensive application prospect and market expansion value.
Description
Technical field
The invention belongs to the detection and the acquisition technique field of voice signal, particularly a kind of speech detecting instrument that does not rely on air transmitted.
Background technology
Voice are that the mankind exchange and obtain one of important channel of information.Yet present widely used speech signal collection system almost only limits to a kind of conduction mode of sound, i.e. the air transmitted pattern of voice.It is meant with the air is the medium conducted acoustic waves and is the mode of people's ear (or microphone etc.) institute's perception.But the acquisition method of this voice has suitable limitation, and is poor as the noiseproof feature of voice, directional performance is poor, can gather weakness such as distance is little.
The non-air conduction detection system of voice then can be broken these restrictions.It is meant be not the medium that information is propagated with the air, and conducts voice by means of other medium (as radar wave).This mode is surveyed the voice signal that breaks traditions and logging mode, overcomes the deficiency of traditional voice acquisition of signal method, and has some new characteristics.As the good directionality of voice, noise robustness is strong, and operating distance is far away etc.Can be widely used in simultaneously fields such as acoustic signal detection under the oriented detection, strong noise environment of medical rehabilitation, voice, weak vibration signal non-contact detecting, have broad application prospects.
At present, the one piece of article that only has Zong-Wen Li in 1996 year to deliver in the relevant research both at home and abroad, this piece article is inferred may exist a kind of like this technology, can utilize radar wave to detect voice signal, and has provided relevant theoretical derivation.But it does not provide the particular hardware implementation method of utilizing radar wave to detect voice signal, does not see relevant later stage research yet.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned prior art, a kind of speech detecting instrument that does not rely on air transmitted is provided, and this speech detecting instrument can remedy the deficiency of traditional voice detection system, has some simultaneously as good directionality, noise robustness is strong, and operating distance far waits new feature.
For achieving the above object, the technical solution used in the present invention is: comprise some a millimeter wave phase controlled oscillator frequently and a directional coupler that is connected with the output terminal of millimeter wave phase controlled oscillator frequently, the output of this directional coupler divides two-way, one the tunnel links to each other with circulator, another road links to each other with balanced mixer, circulator also links to each other with antenna and balanced mixer respectively, and the output terminal of balanced mixer links to each other with signal amplification/wave filter.
The output of signal amplification/wave filter of the present invention also links to each other with computing machine through analog to digital converter; Point is the high frequency continuous wave of the high stability of a millimeter wave phase controlled oscillator frequency of generation between 10～100GHz frequently; Circulator mails to antenna with the signal of directional coupler output through circulator, and the echoed signal with antenna outputs to balanced mixer through circulator simultaneously, and stops the echoed signal of the antenna directional coupler that is coupled back; Antenna will be launched by the higher-frequency radar ripple of circulator output, and the echoed signal of synchronous receiving radar, and the type of antenna 4 comprises various large-scale, small-sized, miniature parabola antenna, plate aerial or lens antenna; Balanced mixer carries out balanced mixing with the output of directional coupler and the output signal of circulator, and its output signal is voice and other wide spectrum acoustic signal that will obtain; The signal that signal amplification/wave filter uses the bandpass filtering frequency in 60Hz～8000Hz frequency band range that balanced mixer 5 is exported amplifies and synchronous filtering.
The present invention is by some millimeter wave phase controlled oscillator generation frequently radar wave, transfer two-way to through directional coupler, one the tunnel mails to antenna through circulator, balanced mixing is carried out with the radar echo signal that comes through circulator in another road after decaying, obtain voice or other wide spectrum acoustic signal again after signal amplification and filtering.Has the not available advantage of multiple air transmitted speech detection method owing to utilize millimetre-wave radar to survey voice signal, again since native system have noncontact, safety, real-time, be easy to carry, advantage such as low cost, therefore to have broken through traditional be the speech detection pattern of medium with acoustic sensor with the air to present technique, expanded its application greatly, had broad application prospects and market popularization value.
Description of drawings
Fig. 1 is an one-piece construction synoptic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
Referring to Fig. 1, a directional coupler 2 that the present invention includes some millimeter wave phase controlled oscillator 1 frequently and be connected with the output terminal of millimeter wave phase controlled oscillator 1 frequently, the output of this directional coupler 2 divides two-way, one the tunnel links to each other with circulator 3, another road links to each other with balanced mixer 5, circulator 3 also links to each other with antenna 4 and balanced mixer 5 respectively, and the output terminal of balanced mixer 5 links to each other with signal amplification/wave filter 6, and signal amplification/wave filter 6 links to each other with computing machine 8 through analog to digital converter 7.
Because in the detection process of voice and other acoustic signal, the voice signal that actual acquisition is returned is subjected to the influence of various interference, so the radar voice signal also needs to change also as calculated through analog to digital converter usually, and the machine processing just can reach better quality.
The high frequency continuous wave of a high stability of some millimeter wave phase controlled oscillator 1 generation frequently, its frequency is between 10～100GHz;
The signal that directional coupler 2 will be put millimeter wave phase controlled oscillator 1 output frequently is divided into two-way: the one tunnel transports to antenna 4 via circulator 3, and another road outputs to balanced mixer 5 after overdamping;
Balanced mixer 5 carries out balanced mixing with the output of directional coupler and the output signal of circulator, and its output signal is voice and other acoustic signal that will obtain;
Signal amplification/wave filter 6 amplifies the signal of balanced mixer 5 outputs and synchronous filtering, uses the bandpass filtering frequency in 60Hz～4000Hz frequency band range.
Although what the present invention discussed is a kind of speech detecting instrument that does not rely on air transmitted, but usable range of the present invention is not limited in the detection of voice signal, because high frequency millimetre-wave radar ripple has the high characteristics of sensitivity, therefore the present invention also can be widely used in the detection of all kinds of wide spectrum acoustic signals, comprise and utilize conventional microphone to collect, the atomic weak acoustics and the detection of vibration signal;
The antenna of employing of the present invention comprises antennas such as parabola, flat board, lens, but antenna of the present invention is not limited to these antenna kind, say on the stricti jurise, any can launch and the antenna of receiving radar ripple signal can both be used by native system, but its performance is high more certainly good more;
The present invention utilizes millimetre-wave radar detection voice signal to have multiple air transmitted speech detection side The not available advantage of method is if break away from traditional acoustic sensor of must settling near sound source Restriction does not have any constraint to detected object, and can penetrate certain medium and barrier detects, Thereby be expected in such as speech, report, stage performance, occasion, the complicated acoustic enviroment such as make a phone call The oriented detection of voice, faint broadband acoustic signals detect, the disaster assistance (wound in earthquake, the landslide The member seeks), speech detection, evaluation, recovery and the monitor system of hospital clinical, struggle against terror, state Be used widely in the fields such as family's safety, again because millimeter wave speech detection radar system has non-connecing Touch, safety (transmitting power is lower ten times than mobile phone power), real-time, be easy to carry, low cost etc. is excellent Point, so native system has been broken through traditional with acoustic sensor and the speech detection mould take air as medium Formula has been expanded its application greatly, has broad application prospects and market popularization value.
Claims (7)
1, a kind of speech detecting instrument that does not rely on air transmitted, it is characterized in that: comprise some a millimeter wave phase controlled oscillator (1) frequently and a directional coupler (2) that is connected with the output terminal of millimeter wave phase controlled oscillator (1) frequently, the output of this directional coupler (2) divides two-way, one the tunnel links to each other with circulator (3), another road links to each other with balanced mixer (5), circulator (3) also links to each other with antenna (4) and balanced mixer (5) respectively, and the output terminal of balanced mixer (5) links to each other with signal amplification/wave filter (6).
2, the speech detecting instrument that does not rely on air transmitted according to claim 1 is characterized in that: the output of said signal amplification/wave filter (6) also links to each other with computing machine (8) through analog to digital converter (7).
3, the speech detecting instrument that does not rely on air transmitted according to claim 1 is characterized in that: said millimeter wave phase controlled oscillator (1) frequently produces the high frequency continuous wave of the high stability of a frequency between 10～100GHz.
4, the speech detecting instrument that does not rely on air transmitted according to claim 1, it is characterized in that: said circulator (3) mails to antenna (4) with the signal of directional coupler (2) output through circulator (3), echoed signal with antenna (4) outputs to balanced mixer (5) through circulator (3) simultaneously, and stops the echoed signal of antenna (4) directional coupler (2) that is coupled back.
5, the speech detecting instrument that does not rely on air transmitted according to claim 1, it is characterized in that: said antenna (4) will be launched by the higher-frequency radar ripple of circulator (3) output, and the echoed signal of synchronous receiving radar, the type of antenna (4) comprises various large-scale, small-sized, miniature parabola antenna, plate aerial or lens antenna.
6, the speech detecting instrument that does not rely on air transmitted according to claim 1, it is characterized in that: said balanced mixer (5) carries out balanced mixing with the output of directional coupler (2) and the output signal of circulator (3), and its output signal is voice and other wide spectrum acoustic signal that will obtain.
7, the speech detecting instrument that does not rely on air transmitted according to claim 1 is characterized in that: the signal that said signal amplification/wave filter (6) uses the bandpass filtering frequency in 60Hz～8000Hz frequency band range that balanced mixer 5 is exported amplifies and synchronous filtering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910023558A CN101625861A (en) | 2009-08-11 | 2009-08-11 | Speech detecting instrument independent of air conduction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910023558A CN101625861A (en) | 2009-08-11 | 2009-08-11 | Speech detecting instrument independent of air conduction |
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| CN101625861A true CN101625861A (en) | 2010-01-13 |
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| CN200910023558A Pending CN101625861A (en) | 2009-08-11 | 2009-08-11 | Speech detecting instrument independent of air conduction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113628617A (en) * | 2020-05-09 | 2021-11-09 | 西安电子科技大学青岛计算技术研究院 | Intelligent voice equipment control method based on millimeter wave radar |
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2009
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113628617A (en) * | 2020-05-09 | 2021-11-09 | 西安电子科技大学青岛计算技术研究院 | Intelligent voice equipment control method based on millimeter wave radar |
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Open date: 20100113 |