CN202794508U - Microphone array based voice locating device applied to rescue - Google Patents
Microphone array based voice locating device applied to rescue Download PDFInfo
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- CN202794508U CN202794508U CN201220454032.5U CN201220454032U CN202794508U CN 202794508 U CN202794508 U CN 202794508U CN 201220454032 U CN201220454032 U CN 201220454032U CN 202794508 U CN202794508 U CN 202794508U
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Abstract
The utility model discloses a microphone array based voice locating device applied to rescue. The voice locating device comprises a microphone array, a front-mounted frequency-selecting amplifying circuit, a multichannel synchronous sampling module, a data signal processing unit, a data storage module and a target location real-time display module, the data signal processing unit is connected with the data storage module, the multichannel synchronous sampling module and the target location real-time display module, the multichannel synchronous sampling module is connected with the front-mounted frequency-selecting amplifying circuit, and the microphone array is merely connected with the front-mounted frequency-selecting amplifying circuit. According to the microphone array based voice locating device applied to rescue,, under the rescue environment of low signal to noise ratio, multipurpose location can be achieved, the speed is fast, the cost is low, the accuracy is high, a certain of timeliness is achieved, and the implementation is easy to achieve.
Description
Technical field
The invention belongs to the sound localization technical field, particularly a kind of voice locating device based on microphone array that is applied to rescue.
Background technology
The position that the single microphone system obtains between high-quality sound-source signal requirement sound source and the microphone is relatively fixing, and is far apart from sound source when microphone, perhaps exists under the reverberation and the situation of interference to a certain degree, can make the quality degradation of pickoff signals.In order to solve these limitation of single microphone system, people have proposed to carry out with microphone array the method for speech processes, because the microphone array system has many advantages than the single microphone system: the microphone array system has the space selectivity characteristic; Allow target within the specific limits mobile and do not change reciever to; Be convenient to automatic detection, location to moving target.
Mainly the microphone array technology is used for the directions such as voice obtain, speech recognition, auditory localization abroad.Flanagan was incorporated into microphone array in the voice enhancing of convention in 1985, and developed a lot of actual products.Silverman was incorporated into speech recognition system with microphone array in 1987, and the voice that again Array Signal Processing were used under the mobile environment in 1992 obtain, and are applied to afterwards Speaker Identification.Nineteen ninety-five Flanagan catches sound with Array Signal Processing under the reverberation environment.Silverman in 1996 and Brandstein begin to be applied in the auditory localization, are used for determining and real-time follow-up speaker's position.Especially in this field of auditory localization, external research is gone first than us really, domesticly mainly the microphone array technology is used in the directions such as video monitoring.Look the research and development that there is Related product in company etc. such as China North Industries Group Corporation, Haikang prestige.And aspect acoustic detection and identification with respect to comparatively backward abroad, up to the present also do not have the microphone array product of autonomous property right.Existing Microphone Array Speech positioning system adopts the audio codec of Codec class as the core of collection signal mostly, this design is difficult to accomplish true synchronization in the above sound signal collecting of two-way, and the signal gain amplifier is not continuously adjustable, only have fixing several yield values optional, sample frequency neither be controlled continuously, only there are several fixing sample frequency values available, some has the environment of particular requirement to voice signal yield value or sample frequency value under, used very large inconvenience; When needs gather the above voice signal of two-way, the Codec codec must at first spread out of the hardware ID number of oneself, then just can transfer out the data of collection, so that digital signal processing unit identification is the data which road Acquisition Circuit is passed back, this is so that each startup collection all needs to carry out this step, reduce to a certain extent system performance, affected the real-time of system.
The phonetic hearing location has irreplaceable advantage than existing visual pattern location, at first, field of vision is limited at less than in 180 ° the scope, and can not pass lighttight barrier, be subject to easily the impact of ambient light power, therefore simple to rely on robot vision to obtain the precision that external information positions relatively low.Than the voice positioning system, some life detection instrument systems mainly rely on the electric field (being produced by heart) that catches the generation of human body ultralow frequency electric wave to find the position of " living person ", when running into barrier metallization, because this electric field is vulnerable to the interference of metal, even conductively-closed, thereby life-detection instrument detects apart from being had a strong impact on, the voice positioning system has relatively simple in structure, be easy to realize that relatively economical is difficult for affecting advantages such as detecting distance because of barrier.
Existing voice locating device mostly is applied to video conference call, the fields such as radio communication, and the personnel that will be applied to based on the voice location technology of microphone array search and rescue or the rescue robot field is a major progress in this field, undeniable, described voice positioning system is searched and rescued or rescue robot is executed the task the particular location of trapped personnel is provided when searching and rescuing trapped personnel personnel, for search and rescue provide definite target location, improved to a great extent rescue efficiency, also striven for the valuable time for rescue, therefore described voice positioning system has great practical significance and using value in personnel's search and rescue or rescue robot field; Except the few application of described voice location technology and personnel's search and rescue or rescue robot field, the inventor also finds, picking up sound at existing microphone array is the positional information that all needs to pass back microphone,, be used for identification and be the signal which microphone is passed back perhaps pass the Acquisition Circuit that links to each other with microphone back ID number; Existing microphone array locating device mostly can only be located single target, and the signal to noise ratio (S/N ratio) of environment is required when using highlyer, and this brings a lot of inconvenience when reality is used.
Summary of the invention
The object of the present invention is to provide a kind ofly under the not high rescue environment of signal to noise ratio (S/N ratio), can realize multiobject location, and speed is fast, cost is low, precision is high, has certain real-time, the voice locating device based on microphone array that is applied to rescue that is easy to realize.
The technical solution that realizes the object of the invention is:
A kind of voice locating device based on microphone array that is applied to rescue, described system comprises microphone array, preposition selective frequency amplifier circuit, multi-channel synchronous sampling module, data signal processing unit, the real-time display module of data memory module and target location; Data signal processing unit links to each other with data memory module, multi-channel synchronous sampling module and target location three modules of real-time display module; The multi-channel synchronous sampling module also links to each other with preposition selective frequency amplifier circuit; Microphone array only links to each other with preposition selective frequency amplifier circuit.
The present invention compared with prior art, its remarkable advantage:
(1) will be applied to based on the voice location technology of microphone array personnel searches and rescues or the rescue robot field, having irreplaceable advantage with traditional vision location with comparing based on the life detection of electric field, is that personnel search and rescue or the much progress in rescue robot field.
(2) described microphone array locating device is applied to can be applicable to the not high environment of signal to noise ratio (S/N ratio) on personnel's search and rescue or the rescue robot.
(3) described microphone array locating device has adjustable gain amplifier, does not simultaneously need to pass back the positional information of microphone, and this is and has the microphone array location technology now and compare one of outstanding advantages that the present invention has.
(4) described microphone array locating device is supported the multi-channel high-speed synchronous acquisition, and acquisition rate can be by software control, and maximum rate can reach more than 50 times of voice band maximum frequency.
(5) described microphone array locating device has the efficient storage structure, can record and preserve multichannel image data, can export to outside the system in order to be further analyzed by digital signal processing unit.
(6) described microphone array locating device has certain real-time, can be on the real-time display module in target location display-object is relatively and the positional information of microphone array in real time.
(7) described microphone array locating device can improve by algorithm, realizes multiobject location, and this is that this compares the another outstanding advantages that the present invention has with existing microphone array location technology.
Below in conjunction with accompanying drawing the present invention is described in further detail.
Description of drawings
Fig. 1 is the structural representation block diagram based on the voice locating device of microphone array that the present invention is applied to rescue.
Fig. 2 is the microphone array structural representation based on the voice locating device of microphone array that the present invention is applied to rescue.
Fig. 3 is the memory module schematic block diagram based on the voice locating device of microphone array that the present invention is applied to rescue.
Fig. 4 be the present invention be applied to rescue based on the digital signal processing unit of the voice locating device of microphone array and real-time display module connecting interface schematic block diagram.
Embodiment
A kind of voice locating device based on microphone array that is applied to rescue of the present invention, described system comprises microphone array, preposition selective frequency amplifier circuit, multi-channel synchronous sampling module, data signal processing unit, the real-time display module of data memory module and target location; Data signal processing unit links to each other with data memory module, multi-channel synchronous sampling module and target location three modules of real-time display module; The multi-channel synchronous sampling module also links to each other with preposition selective frequency amplifier circuit; Microphone array only links to each other with preposition selective frequency amplifier circuit.
Data signal processing unit is connected with data memory module by parallel external memory interface, data signal processing unit is connected with the multi-channel synchronous sampling module by the SPI protocol interface, and data signal processing unit is connected by the real-time display module in universal serial port and target location.
Microphone array adopts planar ten font structure, and is arranged symmetrically, and the microphone of opposite position is a pair of.
The multi-channel synchronous sampling module is enabled the port number that equates with number of microphone.
Every pair of passage of multi-channel synchronous sampling module shares one group of preposition selective frequency amplifier circuit.
The core component of digital signal processing unit is digital signal processor, it has the interface of supporting a plurality of dissimilar external memory storage expansions, the internal bus of supporting the direct access access module is carried in inside, and described digital signal processor carries a plurality of multichannel buffered serial port modules that expand to universal serial port and SPI protocol interface; Its interface that is connected with the real-time display module in target location possesses RS232 data fan-out capability simultaneously.
Data memory module comprises the storer of three class difference in functionalitys: i.e. synchronous DRAM, electrically erasable programmable ROM and synchronized SRAM.
The real-time display module in target location carries universal serial port, has the hardware circuit of energy feedback operation state in the real-time display module serial ports in target location, has the hardware circuit of supporting to touch input.
Its signal trend is: microphone array picks up environmental sound signal of living in, each microphone picks up one road voice signal, all be sent in the preposition selective frequency amplifier circuit, preposition selective frequency amplifier circuit has high precision to the amplification of signal, high noise rejection ratio, hang down zero point drift and low phase drift characteristics in voice band, redundant information in the signal of its output beyond the voice band is by filtering, signal in the voice band will be exaggerated, and gain amplifier is adjustable controlled, be admitted to the multi-channel synchronous sampling module through amplifying signal, sample according to the sample frequency of setting, the signal that is quantized is stored in the data memory module with data mode, before the voice location algorithm of system starts, the user need real-time display module input resolve parameter from the target location, after obtaining these parameters, system positions in data memory module and resolves, and calculates behind the target position information to show in real time on the real-time display module in target location.
In conjunction with Fig. 1, the present invention is a kind of voice locating device based on microphone array that is applied to rescue, it is characterized in that described system comprises microphone array, preposition selective frequency amplifier circuit, the multi-channel synchronous sampling module, data signal processing unit, the real-time display module in data memory module and target location, wherein microphone array adopts planar ten font structure, preposition selective frequency amplifier circuit adopts adjustable gain amplifier design, consisted of by the polytype storage chip in the data memory module, digital signal processing module adopts high performance digital processing chip (DSP), the real-time display module in target location also resolves the parameter input equipment as target localization except the real-time display-object position.The voice positioning system of microphone array of the present invention, except microphone array, other assemblies all are integrated on the circuit board.Preposition selective frequency amplifier circuit among Fig. 1, adopt high precision, low zero point drift and the Design of Amplification Circuit of low phase drift in voice band, in multiobject location algorithm, some algorithm need to be used the phase information of voice signal, this problem has been considered in the design of preposition selective frequency amplifier circuit, thereby the hardware circuit design of employing low phase drift in voice band, the phase drift of this design in voice band almost approaches normal value, even run into the precision that some situation need to improve signal phase, also can in algorithm, use phase compensation to be improved.Adopt the SPI protocol interface between multi-channel synchronous sampling module and the digital signal processing unit.
In conjunction with Fig. 2, the microphone array based on the voice locating device of microphone array that the present invention is applied to rescue adopts planar ten font structure, consider the balance of cost and precision, select to adopt six microphone sensor, distribute as shown in Figure 2: six microphones are divided into three pairs, the first microphone 1 and second microphone 2 partner, and the 3rd microphone 3 and the 4th microphone 4 partner, and the 5th microphone 5 and the 6th microphone 6 partner; Horizontal direction is distributed four microphone sensor, is respectively: the first microphone 1, second microphone 2, the 3rd microphone 3 and the 4th microphone 4, and vertical direction is distributed two microphone sensor, is respectively: the 5th microphone 5 and the 6th microphone 6; Distance between the first microphone 1 and the second microphone 2 equates with distance between the 5th microphone 5 and the 6th microphone 6, the 3rd microphone 3 is positioned at the center of the first microphone 1 and initial point, same the 4th microphone 4 is positioned at the center of second microphone 2 and initial point, correspondingly, be matched microphones quantity, adopt the sampling of six Channel Synchronous, and sampling output order is according to set design sequence output, therefore, when the sampling module data are exported, do not need again data to be judged from the problem of which microphone, therefore there is no need the positional information of microphone is passed to digital signal processing module omitted Acquisition Circuit that differentiation links to each other with microphone ID number.Being allocated as follows of microphone and acquisition channel: the first microphone 1 takies first passage, second microphone 2 takies second channel, and the 3rd microphone 3 takies third channel, and the 4th microphone 4 takies four-way, the 5th microphone 5 takies Five-channel, and the 6th microphone 6 takies the 6th passage.Under the rescue environment of reality, the importance of personnel's to be rescued horizontal direction positional information will be far longer than the positional information of vertical direction, and therefore as shown in Figure 2, in surface level direction four microphone sensor that distributed, vertical direction has been distributed two sensors.Obviously four microphones of horizontal direction bearing accuracy in the face of can greatly improving the standard for the rescue trapped personnel provides than vertical direction positional information more accurately, has improved the success ratio of rescue to a great extent.
Such as Fig. 3, the voice locating device based on microphone array that the present invention is applied to rescue, its data memory module is made of the storer of three types, is respectively: synchronous DRAM, electrically erasable programmable ROM, synchronously static random storage.This storage organization has improved data storage efficiency to a great extent.Described voice positioning system based on microphone has certain real-time, digital signal processor adopts the DSP of high primary frequency as core processor, 3 class storeies shown in Figure 3 link to each other with digital signal processor by the external memory storage expansion bus, for improving data access speed, this external memory storage expansion connected mode all adopts parallel mode.Described external memory storage is the fastest from storage speed synchronized SRAM read or write speed, secondly is synchronous DRAM; The highest from integrated level synchronous DRAM integrated level, low price, the synchronized SRAM integrated level is minimum, and is expensive.The function of 3 class storeies is different in the described system, electrically erasable programmable ROM need to be solidificated in program code in the described voice positioning system with storage, system in a single day power up can be automatically in the electrically erasable programmable ROM loading procedure start positioning function.Synchronized SRAM be used for to be preserved the original sound data from passing back, because its characteristic that has outage not lose, so these data can export to outside the native system, are used for other and further analyze or preserve as record; In addition, synchronized SRAM is also preserved the user and is resolved parameter from what display module was inputted; If the user does not input before once resolving and resolves parameter, then system default will adopt the parameter of resolving of preserving last time automatically.Synchronous DRAM is as system positioning calculation space, and the calculated amount of multiple goal location algorithm is large, and the required space of resolving is large, so data memory module adopts 2 large capacity synchronous dynamic random access memories.Exchanges data in the described data memory module between 3 class storeies can realize with direct mode fast by the bus of digital signal processor inside.
In conjunction with Fig. 4, the voice locating device based on microphone array that the present invention is applied to rescue, the real-time display module in its target location links to each other with digital signal processing unit by the UART serial ports, and this UART serial ports has RS232 data fan-out capability also as native system data export mouth simultaneously.The real-time display module in target location has user's inputting interface, and the user can be by the parameter of inputting interface input system positioning calculation.
Embodiment 1: a kind of voice locating device based on microphone array that is applied to rescue comprises microphone array, preposition selective frequency amplifier circuit, multi-channel synchronous sampling module, data signal processing unit, the real-time display module of data memory module and target location; Data signal processing unit links to each other with data memory module, multi-channel synchronous sampling module and target location 3 modules of real-time display module; The multi-channel synchronous sampling module also links to each other with preposition selective frequency amplifier circuit; Microphone array only links to each other with preposition selective frequency amplifier circuit.
Data signal processing unit is connected with data memory module by parallel external memory interface, data signal processing unit is connected with the multi-channel synchronous sampling module by the SPI protocol interface, and data signal processing unit is connected by the real-time display module in universal serial port and target location.
Microphone array adopts planar ten font structure, has six microphones, and is divided into three pairs, and the first microphone 1 and second microphone 2 partner, and the 3rd microphone 3 and the 4th microphone 4 partner, and the 5th microphone 5 and the 6th microphone 6 partner; Horizontal direction is distributed four microphone sensor, is respectively: the first microphone 1, second microphone 2, the 3rd microphone 3 and the 4th microphone 4, and vertical direction is distributed two microphone sensor, is respectively: the 5th microphone 5 and the 6th microphone 6; Distance between the first microphone 1 and the second microphone 2 equates with distance between the 5th microphone 5 and the 6th microphone 6, the 3rd microphone 3 is positioned at the centre position of the first microphone 1 and cross structure initial point, and same the 4th microphone 4 is positioned at the centre position of second microphone 2 and cross structure initial point.
The multi-channel synchronous sampling module is enabled the port number that equates with number of microphone; Six sampling channels of multi-channel synchronous sampling module are divided into three pairs, and first passage and second channel are a pair of, and third channel and four-way are a pair of, and Five-channel and the 6th passage are a pair of; Six microphones that microphone array comprises and six passages of multi-channel synchronous sampling module are corresponding one by one, the corresponding relation of microphone and sampling channel is respectively: the first microphone 1 takies first passage, second microphone 2 takies second channel, the 3rd microphone 3 takies third channel, the 4th microphone 4 takies four-way, the 5th microphone 5 takies Five-channel, and the 6th microphone 6 takies the 6th passage; Every pair of passage of multi-channel synchronous sampling module shares one group of preposition selective frequency amplifier circuit.
The core component of digital signal processing unit is digital signal processor, it has the interface of supporting a plurality of dissimilar external memory storage expansions, the internal bus of supporting the direct access access module is carried in inside, and described digital signal processor carries a plurality of multichannel buffered serial port modules that expand to universal serial port and SPI protocol interface; Its interface that is connected with the real-time display module in target location possesses RS232 data fan-out capability simultaneously.
Data memory module comprises two synchronous DRAMs, an electrically erasable programmable ROM and a synchronized SRAM.
The real-time display module in target location carries universal serial port, has the hardware circuit of energy feedback operation state in the real-time display module serial ports in target location, has the hardware circuit of supporting to touch input.
Embodiment 2: a kind of voice locating device based on microphone array that is applied to rescue comprises microphone array, preposition selective frequency amplifier circuit, multi-channel synchronous sampling module, data signal processing unit, the real-time display module of data memory module and target location; Data signal processing unit links to each other with data memory module, multi-channel synchronous sampling module and target location 3 modules of real-time display module; The multi-channel synchronous sampling module also links to each other with preposition selective frequency amplifier circuit; Microphone array only links to each other with preposition selective frequency amplifier circuit.
Data signal processing unit is connected with data memory module by parallel external memory interface, data signal processing unit is connected with the multi-channel synchronous sampling module by the SPI protocol interface, and data signal processing unit is connected by the real-time display module in universal serial port and target location.
Microphone array adopts planar ten font structure, has four microphones, and is divided into two pairs, and horizontal direction and vertical direction are respectively arranged a pair of, and wherein, the distance between the two pairs of microphones equates.
The multi-channel synchronous sampling module is enabled the port number that equates with number of microphone; Four sampling channels of multi-channel synchronous sampling module are divided into two pairs, and first passage and second channel are a pair of, and third channel and four-way are a pair of; Four microphones that microphone array comprises and four passages of multi-channel synchronous sampling module are corresponding one by one, the corresponding relation of microphone and sampling channel is respectively: the first microphone takies first passage, second microphone takies second channel, the 3rd microphone takies third channel, and the 4th microphone takies four-way; Every pair of passage of multi-channel synchronous sampling module shares one group of preposition selective frequency amplifier circuit.
The core component of digital signal processing unit is digital signal processor, it has the interface of supporting a plurality of dissimilar external memory storage expansions, the internal bus of supporting the direct access access module is carried in inside, and described digital signal processor carries a plurality of multichannel buffered serial port modules that expand to universal serial port and SPI protocol interface; Its interface that is connected with the real-time display module in target location possesses RS232 data fan-out capability simultaneously.
Data memory module comprises a synchronous DRAM, an electrically erasable programmable ROM and a synchronized SRAM.
The real-time display module in target location carries universal serial port, has the hardware circuit of energy feedback operation state in the real-time display module serial ports in target location, has the hardware circuit of supporting to touch input.
Embodiment 3: a kind of voice locating device based on microphone array that is applied to rescue comprises microphone array, preposition selective frequency amplifier circuit, multi-channel synchronous sampling module, data signal processing unit, the real-time display module of data memory module and target location; Data signal processing unit links to each other with data memory module, multi-channel synchronous sampling module and target location 3 modules of real-time display module; The multi-channel synchronous sampling module also links to each other with preposition selective frequency amplifier circuit; Microphone array only links to each other with preposition selective frequency amplifier circuit.
Data signal processing unit is connected with data memory module by parallel external memory interface, data signal processing unit is connected with the multi-channel synchronous sampling module by the SPI protocol interface, and data signal processing unit is connected by the real-time display module in universal serial port and target location.
Microphone array adopts planar ten font structure, have ten microphones, and be divided into five pairs, horizontal direction is arranged three pairs, vertical direction is arranged two pairs, wherein, six microphone placed points of horizontal direction equidistantly distribute in the horizontal direction together with cross structure initial point, and cross structure initial point is between middle two microphones; Four microphone placed points of vertical direction equidistantly distribute in the vertical direction together with cross structure initial point, and spacing is identical with horizontal-direction pitch, and cross structure initial point is also between middle two microphones; On each direction, two microphones equidistant with cross structure initial point partner.
The multi-channel synchronous sampling module is enabled the port number that equates with number of microphone; Ten sampling channels of multi-channel synchronous sampling module are divided into five pairs, first passage and second channel are a pair of, and third channel and four-way are a pair of, and Five-channel and the 6th passage are a pair of, the 7th passage and the 8th passage are a pair of, and the 9th passage and the tenth passage are a pair of; Ten microphones that microphone array comprises and ten passages of multi-channel synchronous sampling module are corresponding one by one, the corresponding relation of microphone and sampling channel is similar to embodiment 1, every pair of microphone takies a pair of sampling channel, be respectively: the first microphone takies first passage, second microphone takies second channel, the 3rd microphone takies third channel, the 4th microphone takies four-way, the 5th microphone takies Five-channel, the 6th microphone takies the 6th passage, and the 7th microphone takies the 7th passage, and the 8th microphone takies the 8th passage, the 9th microphone takies the 9th passage, and the tenth microphone takies the tenth passage; Every pair of passage of multi-channel synchronous sampling module shares one group of preposition selective frequency amplifier circuit.
The core component of digital signal processing unit is digital signal processor, it has the interface of supporting a plurality of dissimilar external memory storage expansions, the internal bus of supporting the direct access access module is carried in inside, and described digital signal processor carries a plurality of multichannel buffered serial port modules that expand to universal serial port and SPI protocol interface; Its interface that is connected with the real-time display module in target location possesses RS232 data fan-out capability simultaneously.
Data memory module comprises two synchronous DRAMs, an electrically erasable programmable ROM and a synchronized SRAM.
The real-time display module in target location carries universal serial port, has the hardware circuit of energy feedback operation state in the real-time display module serial ports in target location, has the hardware circuit of supporting to touch input.
Claims (10)
1. voice locating device based on microphone array that is applied to rescue, it is characterized in that: described system comprises microphone array, preposition selective frequency amplifier circuit, multi-channel synchronous sampling module, data signal processing unit, the real-time display module of data memory module and target location; Data signal processing unit links to each other with data memory module, multi-channel synchronous sampling module and target location three modules of real-time display module; The multi-channel synchronous sampling module also links to each other with preposition selective frequency amplifier circuit; Microphone array only links to each other with preposition selective frequency amplifier circuit.
2. a kind of voice locating device based on microphone array that is applied to rescue according to claim 1, it is characterized in that: described data signal processing unit is connected with data memory module by parallel external memory interface, data signal processing unit is connected with the multi-channel synchronous sampling module by the SPI protocol interface, and data signal processing unit is connected by the real-time display module in universal serial port and target location.
3. a kind of voice locating device based on microphone array that is applied to rescue according to claim 1 is characterized in that: described microphone array adopts planar ten font structure, and is arranged symmetrically, and the microphone of opposite position is a pair of.
4. a kind of voice locating device based on microphone array that is applied to rescue according to claim 1, it is characterized in that: described multi-channel synchronous sampling module is enabled the port number that equates with number of microphone.
5. a kind of voice locating device based on microphone array that is applied to rescue according to claim 1, it is characterized in that: every pair of passage of described multi-channel synchronous sampling module shares one group of preposition selective frequency amplifier circuit.
6. a kind of voice locating device based on microphone array that is applied to rescue according to claim 1, it is characterized in that: the core component of described digital signal processing unit is digital signal processor, it has the interface of supporting a plurality of dissimilar external memory storage expansions, the internal bus of supporting the direct access access module is carried in inside, and described digital signal processor carries a plurality of multichannel buffered serial port modules that expand to universal serial port and SPI protocol interface; Its interface that is connected with the real-time display module in target location possesses RS232 data fan-out capability simultaneously.
7. a kind of voice locating device based on microphone array that is applied to rescue according to claim 1, it is characterized in that: described data memory module comprises the storer of three class difference in functionalitys: i.e. synchronous DRAM, electrically erasable programmable ROM and synchronized SRAM.
8. a kind of voice locating device based on microphone array that is applied to rescue according to claim 1, it is characterized in that: the real-time display module in described target location carries universal serial port, have the hardware circuit of energy feedback operation state in the real-time display module serial ports in target location, have the hardware circuit of supporting to touch input.
9. a kind of voice locating device based on microphone array that is applied to rescue according to claim 3, it is characterized in that: described microphone array has six microphones, and be divided into three pairs, the first microphone (1) and second microphone (2) partner, the 3rd microphone (3) and the 4th microphone (4) partner, and the 5th microphone (5) and the 6th microphone (6) partner; Horizontal direction is distributed four microphone sensor, be respectively: the first microphone (1), second microphone (2), the 3rd microphone (3) and the 4th microphone (4), vertical direction is distributed two microphone sensor, is respectively: the 5th microphone (5) and the 6th microphone (6); Distance between the first microphone (1) and the second microphone (2) equates with distance between the 5th microphone (5) and the 6th microphone (6), the 3rd microphone (3) is positioned at the centre position of the first microphone (1) and cross structure initial point, and same the 4th microphone (4) is positioned at the centre position of second microphone (2) and cross structure initial point.
10. a kind of voice locating device based on microphone array that is applied to rescue according to claim 7, it is characterized in that: described synchronous DRAM is provided with two.
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2012
- 2012-09-07 CN CN201220454032.5U patent/CN202794508U/en not_active Expired - Lifetime
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