CN102879804B - Life detection method and the life detectors based on the method - Google Patents
Life detection method and the life detectors based on the method Download PDFInfo
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- CN102879804B CN102879804B CN201210369884.9A CN201210369884A CN102879804B CN 102879804 B CN102879804 B CN 102879804B CN 201210369884 A CN201210369884 A CN 201210369884A CN 102879804 B CN102879804 B CN 102879804B
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Abstract
The present invention relates to field of rescue equipment, be specifically related to a kind of life detection method and the life detectors based on the method.The method comprises the keying sequence comprising multiple encrypted message according to forming initial fields one group; Response rule and encrypted message are sent to same direction successively; After sending encrypted message, gather the audio-frequency information in environment at every turn; Audio-frequency information is carried out contrast information of obtaining a result with response rule and forms object information sequence; Keying sequence and object information sequence are carried out matching operation, calculates similarity degree and judge whether this direction has survivor; The position of survivor is calculated by multipoint positioning mode.This detector comprises directional loudspeaker, acoustic pickup, microphone, the first amplifying circuit, the second amplifying circuit and password message processor.Can fast to survivor's travel direction location by said method and detector, just accurately determined the position of survivor afterwards by multipoint positioning mode by the position of mobile directional loudspeaker, field headquarters of going forward side by side is rescued.
Description
Technical field
The present invention relates to field of rescue equipment, be specifically related to a kind of life detection method and the life detectors based on the method.
Background technology
Because natural cause or mankind's activity often cause various geologic hazard or disaster to occur, such as earthquake, rubble flow, mine landslide, permeable etc.People can bury or under shutoff by these disasters or disaster, if can not get timely rescue probably cause personnel death.
" gold 72 hours " is the gold rescue phase after geologic hazard occurs, and this is the common recognition on rescue () boundary.Rescue circle is thought, there is one " gold 72 hours " after disaster occurs, at this moment in section, the survival rate of the victims of the disaster is high.Often dig one block of soil, many picks one point of ground more, can breathe freely to the wounded and the chance of life.In all previous violent earthquake all over the world, the internationalization rescue in 72 hours is the most effective rescue mode.
But because survivor is by buried underground, rescue personnel often cannot find the position of survivor in time, can only excavate, to meeting survivor by carrying out blindly.This enforcement rescue party tropism is not strong, and efficiency is low, sometimes even may cause secondary injury to survivor owing to moving or cutting Surface mulch thing.
Summary of the invention
The invention provides a kind of life detection method;
Present invention also offers a kind of life detectors based on the method.
Life detection method provided by the present invention and the life detectors based on the method can by the positions of sound localization survivor.
In order to achieve the above object, technical scheme of the present invention is achieved in that
Life detection method, comprises the following steps:
The keying sequence of multiple encrypted message is comprised according to forming initial fields one group;
Encrypted message in the response preset rule and described keying sequence is amplified successively;
The response preset rule after amplifying and encrypted message are sent to same direction successively;
After sending encrypted message, gather the audio-frequency information in environment at every turn;
Described audio-frequency information is amplified;
Audio-frequency information after amplifying and the response rule preset are contrasted, and information of obtaining a result successively, composition object information sequence;
Keying sequence and object information sequence are carried out matching operation, calculates the similarity degree of keying sequence and object information sequence, judge whether the party upwards has survivor accordingly;
The position of survivor is calculated by multipoint positioning mode.
Further, in aforesaid life detection method, describedly specifically to comprise the following steps: according to forming initial fields one group of step comprising the keying sequence of multiple encrypted message
Select a kind of chaotic maps mode;
According to selected chaotic maps, by giving initial value, generate the chaos Number Sequence that a group comprises multiple chaos number;
Draw the threshold value of chaos Number Sequence;
Each chaos number in chaos Number Sequence is compared with threshold value successively, and according to the transformation rule preset, comparative result is converted to encrypted message, composition keying sequence.
Further, in aforesaid life detection method, described step of being undertaken contrasting by the response rule preset after amplifying specifically comprises the following steps:
Audio-frequency information is carried out discrete Fourier transform (DFT), obtains environment audio-frequency information amplitude frequency curve;
Environment audio-frequency information amplitude frequency curve and the regulation amplitude frequency curve preset are contrasted.
Further, in aforesaid life detection method, described step of keying sequence and object information sequence being carried out matching operation comprises the following steps: further
Keying sequence and object information sequence are carried out matched filter operation, obtains matched filter operation result;
Matching threshold is set;
Matched filter operation result and matching threshold are compared.
Further, in aforesaid life detection method, comprise further between the step that the step of the described audio-frequency information gathered after at every turn sending encrypted message in environment and being carried out by described audio-frequency information is amplified:
Described audio-frequency information is carried out filtration and remove noise.
Life detectors, comprise directional loudspeaker, acoustic pickup, microphone, the first amplifying circuit, the second amplifying circuit and password message processor;
Described password message processor, described microphone, described first amplifying circuit and described directional loudspeaker connect successively; Described acoustic pickup, described second amplifying circuit and described password message processor connect successively;
Described password message processor is used for:
Comprise the keying sequence of multiple encrypted message according to forming initial fields one group, and the encrypted message in described keying sequence is sent to microphone successively;
The response rule preset is sent to microphone;
The audio-frequency information of acoustic pickup collection and the response rule preset are contrasted, and information of obtaining a result successively, composition object information sequence;
Keying sequence and object information sequence are carried out matching operation, calculates the similarity degree of keying sequence and object information sequence, judge whether the party upwards has survivor accordingly;
Described microphone is used for: receive described encrypted message and respond rule, and being sent to the first amplifying circuit;
Described first amplifying circuit is used for: receive and amplify described encrypted message and respond rule, afterwards the encrypted message after amplification and response rule is sent to described directional loudspeaker;
Described directional loudspeaker is used for: receive the described encrypted message after amplifying and respond rule, and sending to predetermined direction;
Described acoustic pickup is used for: gather the audio-frequency information in environment, and be sent to described second amplifying circuit;
Described second amplifying circuit is used for: receive and amplify described audio-frequency information, afterwards the audio-frequency information after amplification is sent to described password message processor.
Further, in aforesaid life detectors, described password message processor comprises encrypted message generation unit and encrypted message judging unit;
Described encrypted message generation unit is used for:
Store chaotic maps mode, transformation rule and respond rule;
Chaotic maps mode is selected according to instruction; According to selected chaotic maps, by giving initial value, generate the chaos Number Sequence that a group comprises multiple chaos number;
Draw the threshold value of chaos Number Sequence;
Each chaos number in chaos Number Sequence is compared with threshold value successively, and according to the transformation rule preset, chaos Number Sequence is converted to encrypted message, composition keying sequence; Encrypted message in described keying sequence is sent to microphone successively;
The response rule preset is sent to microphone;
Described encrypted message judging unit is used for: keying sequence and object information sequence are carried out matching operation, calculates the similarity degree of keying sequence and object information sequence, judges whether the party upwards has survivor accordingly.
Further, in aforesaid life detectors, described encrypted message generation unit comprises input subelement, controls subelement, cryptographic libraries and encrypted message storing sub-units; Described control subelement is connected with described input subelement, described cryptographic libraries and described encrypted message storing sub-units respectively;
Described input subelement is used for: the instruction and the initial value that receive user, and is sent to control subelement;
Described control subelement is used for:
From described cryptographic libraries, selecting corresponding chaotic maps mode according to described instruction, according to selected chaotic maps, by giving initial value, generating the chaos Number Sequence that a group comprises multiple chaos number;
Draw the threshold value of chaos Number Sequence; Each chaos number in chaos Number Sequence is compared with threshold value successively, and according to the transformation rule preset, comparative result is converted to encrypted message, composition keying sequence;
Encrypted message in described keying sequence is sent to successively microphone and described encrypted message storing sub-units;
The response rule preset is sent to microphone;
Described cryptographic libraries is used for: store chaotic maps mode, transformation rule and respond rule;
Described encrypted message storing sub-units is used for: store described keying sequence.
Further, in aforesaid life detectors, described password message processor comprises display subelement further; Described display subelement is connected with described control subelement;
Described display subelement is used for: show described instruction, described initial value, described keying sequence and described object information sequence.
Further, in aforesaid life detectors, also signal processing circuit is comprised; Described acoustic pickup is connected by described signal processing circuit with described second amplifying circuit;
Described signal processing circuit is used for: the audio-frequency information gathered by described acoustic pickup carries out being sent to described second amplifying circuit after noise is removed in filtration.
Compared with prior art, life detection method provided by the invention and based on the life detectors of the method by comprising the keying sequence of multiple encrypted message according to forming initial fields one group, through being sent by directional loudspeaker after using the first amplifying circuit to be amplified by encrypted message afterwards, the encrypted message after being exaggerated can be made to be disseminated to assigned direction, and the people on other direction cannot hear; And also pre-set response rule is also sent in the lump simultaneously, allow survivor know.Acoustic pickup can gather the audio-frequency information in environment afterwards, password message processor is imported into after the second amplifying circuit amplifies, afterwards the audio-frequency information after amplifying and the response rule preset are contrasted, and information of obtaining a result successively, composition object information sequence; Finally keying sequence and object information sequence are carried out matching operation, calculate the similarity degree of keying sequence and object information sequence, judge whether the party upwards has survivor accordingly.
In this way just can fast to survivor's travel direction location of surviving, just accurately determined the position of survivor afterwards by multipoint positioning mode by the position of mobile directional loudspeaker, field headquarters of going forward side by side is rescued.
Accompanying drawing explanation
In order to be illustrated more clearly in the specific embodiment of the invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The process flow diagram of the life detection method that Fig. 1 provides for the embodiment of the present invention one;
The process flow diagram of the life detection method that Fig. 2 provides for the embodiment of the present invention two;
Fig. 3 is the process flow diagram according to forming initial fields keying sequence in the embodiment of the present invention two;
Fig. 4 is the process flow diagram in the embodiment of the present invention two, keying sequence and object information sequence being carried out to matching operation;
The one-piece construction schematic diagram of the life detectors that Fig. 5 provides for the embodiment of the present invention three;
The one-piece construction schematic diagram of the life detectors that Fig. 6 provides for the embodiment of the present invention four;
The structural representation of the encrypted message generation unit that Fig. 7 provides for the embodiment of the present invention four;
The one-piece construction schematic diagram of the loudspeaker support that Fig. 8 provides for the embodiment of the present invention four;
The locus schematic diagram of the localization method that Fig. 9 provides for the embodiment of the present invention four;
The triangle polyester fibre algorithm schematic diagram of the localization method that Figure 10 to 12 provides for embodiment four.
Reference numeral: 1-directional loudspeaker, 2-acoustic pickup, 3-microphone, 4-first amplifying circuit, 5-second amplifying circuit, 6-password message processor; 7-signal processing circuit, 8-encrypted message generation unit, 9-encrypted message judging unit, 10-inputs subelement, and 11-controls subelement, 12-cryptographic libraries, 13-encrypted message storing sub-units, 14-shows subelement, 15-base, 16-rack, 17-bearing, 18-urceolus, 19-threaded hole, 20-bolt, 21-oscillating bearing.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly; clear, complete description is carried out below by technical scheme of the present invention; based on the embodiment in the present invention; other embodiments all that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belong to the scope that the present invention protects.
As shown in Figure 1, embodiments of the invention one provide a kind of life detection method, comprise the following steps:
101) keying sequence of multiple encrypted message is comprised according to forming initial fields one group;
102) encrypted message in the response preset rule and described keying sequence is amplified successively;
103) response the preset rule after amplifying and encrypted message are sent to same direction successively;
104) after sending encrypted message, gather the audio-frequency information in environment at every turn;
105) described audio-frequency information is amplified;
106) audio-frequency information after amplifying and the response rule preset are contrasted, and information of obtaining a result successively, composition object information sequence;
107) keying sequence and object information sequence are carried out matching operation, calculate the similarity degree of keying sequence and object information sequence, judge whether the party upwards has survivor accordingly;
108) position of survivor is calculated by multipoint positioning mode.
In this way just can fast to survivor's travel direction location of surviving, just accurately determined the position of survivor afterwards by multipoint positioning mode by the position of mobile directional loudspeaker, field headquarters of going forward side by side is rescued.
When searching for, scene may have a variety of sound, and these sound are mixed in likely just consistent with certain response once together.Also likely the response of survivor is very faint, has been flooded by these sound.Therefore the accuracy improving result is as much as possible needed.
Can be addressed this problem preferably by the mode sending keying sequence.What send due to this method is a keying sequence, and survivor needs to send order according to password and respond rule to send response successively; Carry out contrast to the audio-frequency information in environment according to response rule more afterwards obtain object information sequence and carry out matching operation.The mode responded by continuous several times like this can avoid above-mentioned situation preferably, reduces because caused impact is flooded in ambient sound or response.
In order to improve Effect on Detecting further, can the method that embodiment one provides be improved.Embodiment two provides a kind of life detection method after improvement, as shown in Figure 2, comprises the following steps:
201) keying sequence of multiple encrypted message is comprised according to forming initial fields one group;
202) encrypted message in the response preset rule and described keying sequence is amplified successively;
203) response the preset rule after amplifying and encrypted message are sent to same direction successively;
204) after sending encrypted message, gather the audio-frequency information in environment at every turn;
205) described audio-frequency information is carried out filtration and remove noise;
206) described audio-frequency information is amplified;
207) audio-frequency information after amplifying and the response rule preset are contrasted, and information of obtaining a result successively, composition object information sequence;
208) keying sequence and object information sequence are carried out matching operation, calculate the similarity degree of keying sequence and object information sequence, judge whether the party upwards has survivor accordingly;
209) position of survivor is calculated by multipoint positioning mode.
Have various sound in environment, the spontaneous phenomenons such as such as flowing water, wind, Rolling Stone all can be sounded, and the animal in environment, insect also can be sounded.If the survivor survived has heard encrypted message and made response, these responses just can be mingled with in other sound in the environment collected together.But due to the mixture that received sound is muli-sounds, so the response telling survivor from mixture is wanted to be very difficult.Especially when survivor is distant, or physical demands serious when, the deep fades because initial volume is lower or distant, all can cause the response volume that collects very faint, in very possible capped other sound in the environment, rescue personnel cannot be differentiated.
Sound is produced by the vibration of object, has the frequency Sum fanction of himself, and its frequency Sum fanction of different sound is different.First the frequency Sum fanction of sound various in general environment can be stored, then contrast with the audio-frequency information collected, isolate ambient sound and removed, the sound collected is filtered.
As shown in Figure 3, when carrying out step 201, can be realized by following concrete steps:
2011) a kind of chaotic maps mode is selected;
2012) according to selected chaotic maps, by giving initial value, the chaos Number Sequence that a group comprises multiple chaos number is generated;
2013) threshold value of chaos Number Sequence is drawn;
2014) each chaos number in chaos Number Sequence is compared with threshold value successively, and according to the transformation rule preset, comparative result is converted to encrypted message, composition keying sequence.
Wherein, chaotic maps mode has Logistic mapping, Henon mapping, tent maps, Kent to map.After input initial value, according to the chaotic maps mode that step 2011 is selected, by giving initial value, producing N number of real-valued chaos number, forming real-valued chaos array [C
1, C
2... C
n];
The maximal value L of real-valued chaos number is produced according to step 2012
maxwith minimum value L
min, carry out step 2013, calculated threshold σ, formula is as follows:
Real-valued chaos sequence [the C in step 2014, step 2012 produced
1, C
2... C
n] threshold value that calculates with step 2013 compares, and according to the transformation rule preset, real-valued chaos sequence is converted to binary chaotic sequence [B
1, B
2..B
n], as keying sequence, transformation rule is as follows:
Such encrypted message changed out only comprises 0 and 1, responds and also only has two kinds, for the easy memory of survivor, and is easy to realize.
Such as, responding rule is: if survivor hears " 1 ", then brief large acoustical response word (such as declaiming a "Yes") of survivor or send a sound (sound that such as stone knocks); If survivor hears " 0 ", then survivor is brief loud responds twice same word (such as declaiming twice "Yes" continuously) continuously or doublely sends same sound (such as double stone knocks and sounds).
And step 207 also contrasts by following concrete steps:
2071) audio-frequency information is carried out discrete Fourier transform (DFT), obtain environmental audio signal amplitude frequency curve;
2072) environmental audio signal amplitude frequency curve and the regulation amplitude frequency curve preset are contrasted.
Wherein, step 2071 can be realized by following concrete steps: when sending out first encrypted message, setting i=1;
(1) the M point audio-frequency information in environment is gathered, and to M point rescue site audio-frequency information x
mm () carries out discrete Fourier transform (DFT), formula is as follows:
(2) according to discrete Fourier transform (DFT) result in step (1), the amplitude frequency curve of collected environmental audio signal is shown.
Afterwards, in step 2072, environmental audio signal amplitude frequency curve and the regulation amplitude frequency curve preset are contrasted, find out i-th code signal that survivor sends.
Continue to make i=i+1, and repeat step 2071 and step 2072, terminate until send encrypted message.
Like this when a higher peak value appears in certain frequency place in environmental audio signal amplitude frequency curve, be just considered to survivor and have issued a sound, corresponding become object information be exactly " 1 "; If when twice similar peak value appears in some cline frequency place in environmental audio signal amplitude frequency curve, be just considered to that survivor is double have issued same sound, corresponding become object information be exactly " 0 ".By that analogy, a succession of object information sequence be made up of 0 and 1 can finally just be obtained.
Afterwards, as shown in Figure 4, step 208 can according to following concrete steps process:
2081) keying sequence and object information sequence are carried out matched filter operation, obtain matched filter operation result;
2082) matching threshold is set;
2083) matched filter operation result and matching threshold are compared.
When carrying out matched filter operation preferably according to the following formula:
Wherein,
with
be respectively of keying sequence B
of individual sampled point value and object information sequence X
individual sampled point value.
If threshold value is δ, the threshold value in step 2082 is calculated by following formula:
Carry out step 2083 afterwards.If
object information sequence [X is described
1, X
2... X
n] and keying sequence [B
1, B
2... B
n] similarity very high, namely judge that this direction exists survivor; If
object information sequence [X is described
1, X
2... X
n] and keying sequence [B
1, B
2... B
n] similarity lower, namely there is not survivor in this direction.
Whether the sending direction so just can judging encrypted message fast and accurately exists survivor.
Embodiments of the invention three provide a kind of life detectors, as shown in Figure 5, comprise directional loudspeaker 1, acoustic pickup 2, microphone 3, first amplifying circuit 4 and the second amplifying circuit 5 and password message processor 6;
Password message processor 6, microphone 3, first amplifying circuit 4 and described directional loudspeaker 1 connect successively; Acoustic pickup 2, second amplifying circuit 5 and password message processor 6 connect successively;
Password message processor 6 for:
Comprise the keying sequence of multiple encrypted message according to forming initial fields one group, and the encrypted message in described keying sequence is sent to microphone 3 successively;
The response rule preset is sent to microphone 3;
Audio-frequency information and the response rule preset are contrasted, and information of obtaining a result successively, composition object information sequence; Keying sequence and object information sequence are carried out matching operation, calculates the similarity degree of keying sequence and object information sequence, judge whether the party upwards has survivor accordingly;
Microphone 3 for: receive encrypted message and respond rule, and being sent to the first amplifying circuit 4;
First amplifying circuit 4 for: receive and amplify described encrypted message and respond rule, afterwards by amplify after encrypted message and respond rule be sent to directional loudspeaker 1;
Directional loudspeaker 1 for: receive the described encrypted message after amplifying and respond rule, and to send to predetermined direction;
Acoustic pickup 2 for: gather the audio-frequency information in environment, and be sent to the second amplifying circuit 5;
Second amplifying circuit 5 for: receive and amplify described audio-frequency information, afterwards by amplify after audio-frequency information be sent to password message processor 6.
By comprising the keying sequence of multiple encrypted message according to forming initial fields one group, through being sent by directional loudspeaker 1 after using the first amplifying circuit 4 to be amplified by encrypted message afterwards, the encrypted message after being exaggerated can be made to be disseminated to assigned direction, and the people on other direction cannot hear.And also pre-set response rule is also sent in the lump simultaneously, allow survivor know.Acoustic pickup 2 can gather the audio-frequency information in environment afterwards, password message processor 6 is sent to after the second amplifying circuit 5 amplifies, afterwards the audio-frequency information after amplifying and the response rule preset are contrasted, and information of obtaining a result successively, composition object information sequence; Finally keying sequence and object information sequence are carried out matching operation, calculate the similarity degree of keying sequence and object information sequence, judge whether the party upwards has survivor accordingly.
In this way just can fast to survivor's travel direction location of surviving, afterwards by the position of mobile directional loudspeaker 1 with point to the position just accurately determining survivor by multipoint positioning mode, field headquarters of going forward side by side is rescued.
In order to improve the performance of life detectors, embodiments of the invention four provide a kind of follow-on life detectors, as shown in Figure 6, directional loudspeaker 1, acoustic pickup 2, microphone 3, first amplifying circuit 4, second amplifying circuit 5, password message processor 6 and signal processing circuit 7 is comprised; Wherein, password message processor 6 comprises again encrypted message generation unit 8 and encrypted message judging unit 9 further;
Password message processor 6, microphone 3, first amplifying circuit 4 and directional loudspeaker 1 connect successively; Acoustic pickup 2, signal processing circuit 7, second amplifying circuit 5 and password message processor 6 connect successively; Second amplifying circuit 5 is second amplifying circuit;
Described encrypted message generation unit 8 for:
Store chaotic maps mode, transformation rule and respond rule;
Chaotic maps mode is selected according to instruction;
According to selected chaotic maps, by giving initial value, generate the chaos Number Sequence that a group comprises multiple chaos number;
Draw the threshold value of chaos Number Sequence;
Each chaos number in chaos Number Sequence is compared with threshold value successively, and according to the transformation rule preset, comparative result is converted to encrypted message, composition keying sequence;
Encrypted message in described keying sequence is sent to microphone 3 successively;
The response rule preset is sent to microphone 3;
Encrypted message judging unit 9 for: keying sequence and object information sequence are carried out matching operation, calculate the similarity degree of keying sequence and object information sequence, judge whether the party upwards has survivor accordingly;
Described microphone 3 for: receive encrypted message and respond rule, and being sent to the first amplifying circuit 4;
First amplifying circuit 4 for: receive and amplify described encrypted message and respond rule, afterwards by amplify after encrypted message and respond rule be sent to directional loudspeaker 1;
Directional loudspeaker 1 for: receive the described encrypted message after amplifying and respond rule, and to send to predetermined direction;
Acoustic pickup 2 for: gather the audio-frequency information in environment, and be sent to the second amplifying circuit 5;
Signal processing circuit 7 carries out being sent to the second amplifying circuit 5 after noise is removed in filtration for: the audio-frequency information gathered by acoustic pickup 2.
Second amplifying circuit 5 for: receive and amplify described audio-frequency information, afterwards by amplify after audio-frequency information be sent to password message processor 6.
The life detectors that embodiment two provides are compared with embodiment one, password message processor 6 is further divided into again encrypted message generation unit 8 and encrypted message judging unit 9, and add signal processing circuit 7, the second amplifying circuit 5 is set to second amplifying circuit.
Have various sound in environment, the spontaneous phenomenons such as such as flowing water, wind, Rolling Stone all can be sounded, and the animal in environment, insect also can be sounded.If the survivor survived hears the encrypted message that directional loudspeaker 1 sends and made response, these are received by acoustic pickup 2 in responding and being just mingled with in the environment other sound together.But due to the mixture that received sound is muli-sounds, so rescue personnel wants the response telling survivor from mixture to be very difficult.Especially when survivor is distant, or physical demands serious when, the deep fades because initial volume is lower or distant, the response volume that acoustic pickup 2 all can be caused to collect is very faint, in very possible capped other sound in the environment, rescue personnel cannot be differentiated.
Sound is produced by the vibration of object, has the frequency Sum fanction of himself, and its frequency Sum fanction of different sound is different.The frequency Sum fanction of sound various in general environment can be stored by signalization treatment circuit 7, the audio-frequency information then sent with acoustic pickup 2 contrasts, and isolates ambient sound and is removed, can play the effect of filtering noise.
Contrast with response rule again after secondary amplification being carried out to the audio-frequency information after filtering noise by second amplifying circuit afterwards, just more easily tell the response of survivor.
By password message processor 6 being segmented, its function is optimized, Each performs its own functions does not interfere with each other for each parts, cooperatively interacts, can reach better Effect on Detecting.
As shown in Figure 7, encrypted message generation unit 8 also can be made up of input subelement 10, control subelement 11, cryptographic libraries 12, encrypted message storing sub-units 13 and display subelement 14 further; Control subelement 11 respectively with described input subelement 10, cryptographic libraries 12, encrypted message storing sub-units 13 and show subelement 14 and be connected;
Input subelement 10 for: receive the instruction of user and initial value, and be sent to and control subelement 11;
Control subelement 11 for: from described cryptographic libraries 12, select corresponding chaotic maps mode according to described instruction, according to selected chaotic maps, by give initial value, generate the chaos Number Sequence that a group comprises multiple chaos number;
Draw the threshold value of chaos Number Sequence; Each chaos number in chaos Number Sequence is compared with threshold value successively, and according to the transformation rule preset, comparative result is converted to encrypted message, composition keying sequence;
Encrypted message in described keying sequence is sent to successively microphone 3 and described encrypted message storing sub-units 13;
Described instruction, described initial value, described keying sequence and described object information sequence are sent to display subelement 14;
The response rule preset is sent to microphone 3;
Cryptographic libraries 12 for: store chaotic maps mode, transformation rule and respond rule;
Described encrypted message storing sub-units 13 for: store described keying sequence;
Display subelement 14 for: show described instruction, described initial value, described keying sequence and described object information sequence.
The function of life detectors can be made so more comprehensive, improve the accuracy of detection.
When searching for, directional loudspeaker 1 generally all needs to be fixed, can not arbitrarily movement, otherwise to judging that the source place responded can have a negative impact.
Present invention also offers a kind of loudspeaker support for fixed directional loudspeaker 1, comprise base 15 and rack 16; Rack 16 is vertically arranged on base 15; Directional loudspeaker 1 is placed in rack 16 one end away from base 15.So just, the object of fixed directional loudspeaker 1 can be realized.
But when searching for other direction, directional loudspeaker 1 is needed to go to required direction, if only use simple fixed mount fixed directional loudspeaker 1, then needing fixed mount to rotate together with directional loudspeaker 1 when rotating directional loudspeaker 1, bothering very much.At this moment bearing 17 can be set on base 15; Rack 16 is connected by bearing 17 with base 15.So just, simple turning function can be realized, will loudspeaker support entirety not rotate.
When searching for, may also can need to adjust the height of directional loudspeaker 1.Loudspeaker support can be made to comprise urceolus 18 further, and urceolus 18 is vertically arranged on base 15; The bottom of rack 16 is stretched in urceolus 18; And fastening assembly is set between urceolus 18 and rack 16.
After length rack 16 being stretched into urceolus 18 adjusts, play fixation by fastening assembly, loudspeaker support can be made to possess the ability of adjustment directional loudspeaker 1 height.
Described fastening assembly can have various ways, the bolt 20 such as comprising the threaded hole 19 on the sidewall being arranged on urceolus 18 and coordinate with threaded hole 19; Described bolt 20 stretches into one end of urceolus 18 and rack 16 offsets.
In addition, as shown in Figure 8, also urceolus 18 can be coordinated with bearing 17, like this by rotate urceolus 18 can reach change towards object, the length that change rack 16 stretches into urceolus 18 can reach the object changing height, and the investigative range of directional loudspeaker 1 is more comprehensive.
The oscillating bearing 21 adjusting angle between the sending direction of directional loudspeaker 1 and surface level also can be set on the top of rack 16.
As shown in Fig. 9 to Figure 12, the concrete grammar realizing survivor location is described below in conjunction with example:
(1) according to rescue site terrain environment, adjustment rack 16 is positioned at suitable height, and is fixed by threaded hole 19 and bolt 20.
(2) directional loudspeaker 1 is made to be arranged in Fig. 9 A1 position by step (1), rolling bearing 17 and oscillating bearing 21 adjust the direction of directional loudspeaker 1, suppose to turn to the sensing of directional loudspeaker 1 and z-axis angle is α 1 when oscillating bearing 21, bearing 17 turns to the sensing of directional loudspeaker 1 and x-axis angle when being β 1, detects this direction and there is survivor.
(3) mobile directional loudspeaker support, directional loudspeaker 1 is made to be arranged in Fig. 9 A2 position, rolling bearing 17 and oscillating bearing 21 adjust the direction of directional loudspeaker 1 again, suppose to turn to the sensing of directional loudspeaker 1 and z-axis angle is α 2 when oscillating bearing 21, bearing 17 turns to the sensing of directional loudspeaker 103 and x-axis angle when being β 2, detects this direction and there is survivor.
It should be noted that, when step (3) rotates directional loudspeaker 1, the sensing of directional loudspeaker 1 in the sensing of directional loudspeaker and step (2) be made to have intersection point.
In fig .9, suppose that C point represents survivor, the spacing of A1 and A2 is L, according to Figure 10 to Figure 12, calculates | A1B1|, | A1C|, | B1C|, computing formula is as follows:
|A1B1|=|B1C|cot(α1)
|A1C|=|B1C|csc(α1)
Just the position of survivor can accurately be drawn according to the method described above.
When adjusting, also can place multiple measuring appliance on loudspeaker support, the data such as angle, azel are monitored in real time, can digital independent be facilitated like this, be convenient to calculate.
Last it is noted that above embodiment and specific embodiment are only in order to illustrate technical scheme of the present invention, be not intended to limit; Although reference aforementioned embodiments and specific embodiment are to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in aforementioned embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment of the present invention and specific embodiment technical scheme.
Claims (5)
1. life detection method, is characterized in that, comprises the following steps:
The keying sequence of multiple encrypted message is comprised according to forming initial fields one group;
Encrypted message in the response preset rule and described keying sequence is amplified successively;
The response preset rule after amplifying and encrypted message are sent to same direction successively;
After sending encrypted message, gather the audio-frequency information in environment at every turn;
Described audio-frequency information is amplified;
Audio-frequency information after amplifying and the response rule preset are contrasted, and information of obtaining a result successively, composition object information sequence;
Keying sequence and object information sequence are carried out matching operation, calculates the similarity degree of keying sequence and object information sequence, judge whether the party upwards has survivor accordingly;
The position of survivor is calculated by multipoint positioning mode;
Wherein, describedly specifically to comprise the following steps: according to forming initial fields one group of step comprising the keying sequence of multiple encrypted message
Select a kind of chaotic maps mode;
According to selected chaotic maps, by giving initial value, generate the chaos Number Sequence that a group comprises multiple chaos number;
Draw the threshold value of chaos Number Sequence;
Each chaos number in chaos Number Sequence is compared with threshold value successively, and according to the transformation rule preset, comparative result is converted to encrypted message, composition keying sequence;
Wherein, described audio-frequency information after amplifying and the response rule step of carrying out contrasting preset specifically to be comprised the following steps:
Audio-frequency information is carried out discrete Fourier transform (DFT), obtains environment audio-frequency information amplitude frequency curve;
Environment audio-frequency information amplitude frequency curve and the regulation amplitude frequency curve preset are contrasted;
Wherein, described step of keying sequence and object information sequence being carried out matching operation comprises the following steps: further
Keying sequence and object information sequence are carried out matched filter operation, obtains matched filter operation result;
Matching threshold is set;
Matched filter operation result and matching threshold are compared.
2. life detection method as claimed in claim 1, is characterized in that, comprises further between the step that the step of the described audio-frequency information gathered after at every turn sending encrypted message in environment and being carried out by described audio-frequency information is amplified:
Described audio-frequency information is carried out filtration and remove noise.
3. life detectors, is characterized in that, comprise directional loudspeaker, acoustic pickup, microphone, the first amplifying circuit, the second amplifying circuit and password message processor;
Described password message processor, described microphone, described first amplifying circuit and described directional loudspeaker connect successively; Described acoustic pickup, described second amplifying circuit and described password message processor connect successively;
Described password message processor is used for:
Comprise the keying sequence of multiple encrypted message according to forming initial fields one group, and the encrypted message in described keying sequence is sent to microphone successively;
The response rule preset is sent to microphone;
Described microphone is used for: receive described encrypted message and respond rule, and being sent to the first amplifying circuit;
Described first amplifying circuit is used for: receive and amplify described encrypted message and respond rule, afterwards the encrypted message after amplification and response rule is sent to described directional loudspeaker;
Described directional loudspeaker is used for: receive the described encrypted message after amplifying and respond rule, and sending to predetermined direction;
Described acoustic pickup is used for: gather the audio-frequency information in environment, and be sent to described second amplifying circuit;
Described second amplifying circuit is used for: receive and amplify described audio-frequency information, afterwards the audio-frequency information after amplification is sent to described password message processor;
Described password message processor also for, the audio-frequency information of acoustic pickup collection and the response rule that presets to be contrasted, and information of obtaining a result successively, composition object information sequence;
Keying sequence and object information sequence are carried out matching operation, calculates the similarity degree of keying sequence and object information sequence;
According to the keying sequence of calculating and the similarity degree of object information sequence, judge whether described predetermined direction has survivor;
Wherein, described password message processor comprises encrypted message generation unit and encrypted message judging unit;
Described encrypted message generation unit is used for:
Store chaotic maps mode, transformation rule and respond rule;
Chaotic maps mode is selected according to instruction; According to selected chaotic maps, by giving initial value, generate the chaos Number Sequence that a group comprises multiple chaos number;
Draw the threshold value of chaos Number Sequence;
Each chaos number in chaos Number Sequence is compared with threshold value successively, and according to the transformation rule preset, chaos Number Sequence is converted to encrypted message, composition keying sequence; Encrypted message in described keying sequence is sent to microphone successively;
The response rule preset is sent to microphone;
Described encrypted message judging unit is used for: keying sequence and object information sequence are carried out matching operation, calculates the similarity degree of keying sequence and object information sequence, judges whether described predetermined direction has survivor accordingly;
Wherein, described encrypted message generation unit comprises input subelement, controls subelement, cryptographic libraries and encrypted message storing sub-units; Described control subelement is connected with described input subelement, described cryptographic libraries and described encrypted message storing sub-units respectively;
Described input subelement is used for: the instruction and the initial value that receive user, and is sent to control subelement;
Described control subelement is used for:
From described cryptographic libraries, selecting corresponding chaotic maps mode according to described instruction, according to selected chaotic maps, by giving initial value, generating the chaos Number Sequence that a group comprises multiple chaos number;
Draw the threshold value of chaos Number Sequence; Each chaos number in chaos Number Sequence is compared with threshold value successively, and according to the transformation rule preset, comparative result is converted to encrypted message, composition keying sequence;
Encrypted message in described keying sequence is sent to successively microphone and described encrypted message storing sub-units;
The response rule preset is sent to microphone;
Described cryptographic libraries is used for: store chaotic maps mode, transformation rule and respond rule;
Described encrypted message storing sub-units is used for: store described keying sequence.
4. life detectors as claimed in claim 3, it is characterized in that, described password message processor comprises display subelement further; Described display subelement is connected with described control subelement;
Described display subelement is used for: show described instruction, described initial value, described keying sequence and described object information sequence.
5. as the life detectors in claim 3 to 4 as described in any one, it is characterized in that, also comprise signal processing circuit; Described acoustic pickup is connected by described signal processing circuit with described second amplifying circuit;
Described signal processing circuit is used for: the audio-frequency information gathered by described acoustic pickup carries out being sent to described second amplifying circuit after noise is removed in filtration.
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| CN101458326B (en) * | 2007-12-14 | 2011-04-27 | 南京理工大学 | Life detecting device based on pseudocode phase-modulated continuous wave system |
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