CN101998583A - Disaster relief card access method of multifunctional life rescue system for disaster site - Google Patents

Abstract

The invention discloses a disaster relief card access method of a multifunctional life rescue system for a disaster site, which is characterized by comprising a receiving instrument access control method and a relief card access control method, a receiving instrument is wirelessly interactively communicated with a relief card, wherein the receiving instrument access control method comprises a relief card counting process and a relief card information process. The invention has the remarkable advantages of providing a disaster relief card random access method of the multifunctional life rescue system for the disaster site specially aiming at the special environment after a disaster occurs in, effectively overcoming the defects of the traditional access method and the traditional positioning method under the disaster environment, and reliably obtaining position information and personnel information of trapped person.

Description

A kind of disaster scene multi-functional life salvage system aid card accidental access method

Technical field

The present invention relates to radio communication and public safety field, specifically, be the scene to take place, trapped personnel implemented a kind of disaster scene multi-functional life salvage system aid card accidental access method of location based on multi-functional life salvage system in disasters such as earthquake, mud-rock flows.

Technical background

Frequent natural calamity such as earthquake in recent years,, mud-rock flow, landslide take place.Because relatively lagging behind of present technological means is to these also accurately early warning of sudden geology disaster.In case disaster takes place, often cause that the house collapses, personnel are buried, the people's life security suffers serious threat.In order better to save the life that the back trapped personnel takes place disaster, study effective rescue means, the reliable rescue aid of exploitation is imperative.

Multi-functional life salvage system is a kind of life search and rescue system of dynamically setting up under disaster environment, and the receiving instrument that aid card of being carried by trapped personnel and rescue personnel hand constitutes.The rescue personnel utilizes receiving instrument that aid card is carried out and wakes start-up operation up, the aid card that the startup trapped personnel is carried sends quick access information, and set up the essential information of acquisition request trapped personnel by wireless connections, offer help with the location for launching the trapped personnel rescue effectively.

In actual disaster scene, the signal receiver that life aid card that trapped personnel is carried and rescue personnel carry is formed MP-to-MP (Multi-Point-to-Multi-Point) structure.At first, because bury, particular surroundings such as ruins makes in the rescue system that the reliability of link data transmission does not have guarantee between the aid card and receiving instrument; Secondly, because many-sided restrictions such as aid card volume, cost, power consumption, power supply make it be difficult to realize precise synchronization, this also makes and is difficult to adopt for example access control protocols such as TDMA, CDMA; Moreover may there be the mutual interference of control command phase in a plurality of receiving instruments that rescue site exists in the search and rescue process.

Make the access communications between life salvage system aid card and the receiving instrument have multiple uncertain factor and interference for these reasons, and aid card insert efficiently, aid card information is obtained and the aid card location is the key of rapid deployment rescue.Still there is not at present access protocol based on the life salvage system yet.

Summary of the invention

The invention provides a kind of disaster scene multi-functional life salvage system aid card accidental access method based on multi-functional life salvage system, specific environment after taking place at disaster especially, can effectively overcome the existing deficiency of localization method under disaster environment, accurately obtain the positional information and the personal information of trapped personnel.

For achieving the above object, the present invention is based upon on the basis of multi-functional life salvage system.

Multi-functional life salvage system is made up of at least one life aid card and at least one life signal receiving instrument, the life aid card can send to the external world when disaster takes place and include the signal of wearing information such as personnel identity, and the life signal receiving instrument is implemented trapped personnel is located by the signal that receives.

Wherein the life aid card is provided with human body thermal infrared sensor module and heart acquisition sensor module;

The output of described human body thermal infrared sensor module is connected the thermal infrared input of the first low-power scm module;

The output of described heart acquisition sensor module is connected the electrocardio input of the first low-power scm module;

The modulation end of the described first low-power scm module is with first the wireless modulation-demodulation module is two-way is connected;

The described first wireless modulation-demodulation module is through first dual-mode antenna and described life signal receiving instrument radio communication;

Described life signal receiving instrument is provided with the second wireless modulation-demodulation module, and this second wireless modulation-demodulation module is through the 3rd dual-mode antenna and the described first dual-mode antenna radio communication;

The described second wireless modulation-demodulation module is also with second the low-power scm module is two-way is connected;

The video end of the described second low-power scm module is connected on the input of LCD driver module, and the output of LCD driver module is connected with the LCD display module;

The audio frequency end of the described second low-power scm module is connected on the digital input end of D/A modular converter;

The analog output of described D/A modular converter is connected on audio frequency filtering/amplification module input, and the output of described audio frequency filtering/amplification module is connected with loud speaker.

The data-interface end group of the described first low-power scm module is two-way to be connected with big capacity Flash memory.

The dual-tone multifrequency end of the described first low-power scm module is with first the dual-tone multifrequency module is two-way is connected;

The wireless receiving and dispatching end of the described first dual-tone multifrequency module is with first the analog-modulated demodulation module is two-way is connected;

The described first analog-modulated demodulation module is through second dual-mode antenna and described life signal receiving instrument radio communication;

Described life signal receiving instrument is provided with the second analog-modulated demodulation module, and this second analog-modulated demodulation module is through the 4th dual-mode antenna and the described second dual-mode antenna radio communication;

The two-way connection of wireless receiving and dispatching end of the described second analog-modulated demodulation module and the second dual-tone multifrequency module;

The two-way connection of dual-tone multifrequency end of the described second dual-tone multifrequency module and the described first low-power scm module.

Described life aid card also is provided with first power module, and this first power module is each unit module power supply in the described life aid card;

Described life signal receiving instrument also is provided with the second source module, and this second source module is each unit module power supply in the described life signal receiving instrument.

The radio frequency operation frequency of the described first analog-modulated demodulation module and second dual-mode antenna is chosen as 88MHz～108MHz frequency modulation frequency range;

The radio frequency operation frequency of described second analog-modulated demodulation module and the 4th dual-mode antenna is chosen as 88MHz～108MHz frequency modulation frequency range.

The radio frequency operation frequency of the described first wireless modulation-demodulation module and first dual-mode antenna is chosen as the 433MHz ISM band;

The radio frequency operation frequency of described second wireless modulation-demodulation module and the 3rd dual-mode antenna is chosen as the 433MHz ISM band.

Described life aid card stores carrier's identity information and blood group information, can detect the existence of sign of life, utilize the sign of life signal triggering, with framings such as carrier's identity information and blood group information, add beacon signal, constitute distress signal, launch with the RF-wise periodic breaks;

The life signal receiving instrument receives the radiofrequency signal that the life aid card sends, and after demodulation, extracts carrier's identity information and blood group information etc., and storage also shows these information by LCD, simultaneously the rescue information by the voice broadcast trapped personnel.

The life aid card is in the low-power consumption standby state at ordinary times, when disaster takes place when, the rescue personnel carries the life signal receiving instrument and arrives the scene of search and rescue, wake the life aid card that trapped personnel is carried up by the life signal receiving instrument, the life aid card utilizes the vital sign of human body thermal infrared sensor and heart acquisition sensor induction trapped personnel, exist signal as triggering signal with this sign of life, framings such as the identity information of trapped personnel and blood group information, add beacon signal, constitute distress signal, by Digital Microwave modulation system or analog fm mode, digital signal is modulated on the carrier frequency, launch with the RF-wise periodic breaks at last; The rescue personnel searches the radiofrequency signal of launching from the life aid card by the life signal receiving instrument, in case search, behind Digital Microwave demodulation or analog demodulator, extract carrier's identity information and blood group information etc., storage also shows these information by LCD, simultaneously the rescue information by the voice broadcast trapped personnel; Utilize beacon signal and wireless location algorithm to implement trapped personnel search location, instruct the rescue personnel on purpose to implement rescue work.

A kind of disaster scene multi-functional life salvage system aid card accidental access method of the present invention's statement, its key is: be made up of receiving instrument connection control method and aid card connection control method, wherein the receiving instrument connection control method comprises that aid card is added up flow process and aid card information is obtained flow process, realizes that the wireless interaction of receiving instrument and aid card is communicated by letter.

The aid card of A1, described receiving instrument statistics flow process is according to following steps:

Step 1.1, receiving instrument parameter initialization;

Step 1.2, the broadcasting of receiving instrument down channel start and wake instruction n1 time up, wake the aid card in the receiving instrument signal coverage up;

Step 1.3, receiving instrument switch to up channel, enter listening period;

Step 1.4, receiving instrument judge whether the access request of aid card transmission and the sequence number of aid card, if receive the sequence number of the request of access and aid card, then write down the sequence number of aid card, this aid card of hypnosis, listening period is counted the n zero clearing, enters step 1.5;

If do not receive the sequence number of the request of access and aid card, then listening period is counted n=n+1, enters step 1.5;

Step 1.5, judge that listening period counts n and whether reach n2 time,, then return described step 1.3, enter new listening period if do not reach n2 time;

Reach n2 time if listening period is counted n, then enter step 1.6;

Step 1.6, judge whether the access request and the sequence number information of aid card, if insert request and sequence number information, then judging does not have subject of salvage;

If the request of access and sequence number information are arranged, then carry out aid card signal resolution and quantity n3 statistics.

At the scene of searching and rescuing, can set a region of search in advance, and do at least three aid cards around this zone and add up flow process, by three beam searches, again the n3 that searches for three times is added up, find out the wherein on all four aid card of sequence number information, just can be defined as the aid card in this zone, the information of other information inconsistencies may be the aid card outside the region of search, needs further to add up in a plurality of zones.Through the n3 bar information after the screening is aid card resource information more accurately.

The aid card information of A2, described receiving instrument is obtained flow process according to following steps:

Arbitrary information in step 2.1, the selected n3 bar aid card is extracted the sequence number of this aid card;

Step 2.2, activate this aid card, keep hypnosis other aid card according to the aid card sequence number;

Step 2.3, judge whether to obtain the information of described activation aid card, if do not obtain the information of described activation aid card, judge whether that then this aid card has been carried out n4 time to be activated, if also do not arrive n4 activation, then return described step 2.2, activate if carried out n4 time, then enter step 2.4;

If obtained the information of described activation aid card, then directly enter step 2.4;

Step 2.4, discharge this aid card;

Step 2.5, judge whether to finish the release of all n3 bar aid cards; If do not finish, then return described step 2.1;

If finished the release of n3 bar aid card, the information of then finishing is obtained;

Aid card information is obtained flow process and also need be repeated at least three positions of search and rescue region, and main cause is that the life signal receiving instrument is in sensing point A ₁, B ₁, C ₁Receive each the life aid card communication signal that is waken up successively in n3 the life aid card and storage, estimate distance vector d between each life aid card and the life signal receiving instrument according to received signal intensity _A1, d _B1, d _C1Again according to described distance vector d _A1, d _B1, d _C1In element d _A1i, d _B1i, d _C1i, adopt trilateration to calculate the positional information of trapped personnel;

Sensing point A ₁, sensing point B ₁, sensing point C ₁Coordinate be respectively (x _A1, y _A1, z _A1), (x _B1, y _B1, z _B1), (x _C1, y _C1, z _C1), the coordinate of life aid card be (z), there are following formula in x, y:

$\left\{\begin{array}{c}\sqrt{{\left(x-x_{a1}\right)}^2+{(y-y_{a1})}^2+{(z-z_{a1})}^2}=d_{a1i}\\ \sqrt{{(x-x_{b1})}^2+{(y-y_{b1})}^2+{(z-z_{b1})}^2}=d_{b1i}\\ \sqrt{{(x-x_{c1})}^2+{(y-y_{c1})}^2+{(z-z_{c1})}^2}=d_{c1i}\end{array}\right.$

The coordinate that can obtain trapped personnel is:

$\left(\begin{array}{c}x\\ y\\ z\end{array}\right)={\left(\begin{array}{ccc}2(x_{b1}-x_{a1})& 2(y_{b1}-y_{a1})& 2(z_{b1}-z_{a1})\\ 2(x_{c1}-x_{a1})& 2(x_{c1}-x_{a1})& 2(x_{c1}-x_{a1})\\ 2(x_{c1}-x_{b1})& 2(x_{c1}-x_{b1})& 2(x_{c1}-x_{b1})\end{array}\right)}^{-1}\left(\begin{array}{c}{x}_{b1}^2-x_{a1}^2+y_{b1}^2-y_{a1}^2+{\mathrm{<figure-callout\; id="1"\; label="z\; b"\; filenames="HSA00000344206800011.png,HSA00000344206800031.png"\; state="\{\{state\}\}">z</figure-callout>}}_b^1-{\mathrm{<figure-callout\; id="1"\; label="z\; a"\; filenames="HSA00000344206800011.png,HSA00000344206800031.png"\; state="\{\{state\}\}">z</figure-callout>}}_a^1+d_{a1i}^2-d_{b1i}^2\\ x_{\mathrm{<figure-callout\; id="1"\; label="c"\; filenames="HSA00000344206800011.png,HSA00000344206800031.png"\; state="\{\{state\}\}">c</figure-callout>}1}^2-x_{a1}^2+{\mathrm{<figure-callout\; id="1"\; label="y\; c"\; filenames="HSA00000344206800011.png,HSA00000344206800031.png"\; state="\{\{state\}\}">y</figure-callout>}}_c^1-{\mathrm{<figure-callout\; id="1"\; label="y\; a"\; filenames="HSA00000344206800011.png,HSA00000344206800031.png"\; state="\{\{state\}\}">y</figure-callout>}}_a^1+{\mathrm{<figure-callout\; id="1"\; label="z\; c"\; filenames="HSA00000344206800011.png,HSA00000344206800031.png"\; state="\{\{state\}\}">z</figure-callout>}}_c^1-z_{a1}^2+d_{a1i}^2-d_{c1i}^2\\ x_{\mathrm{<figure-callout\; id="1"\; label="c"\; filenames="HSA00000344206800011.png,HSA00000344206800031.png"\; state="\{\{state\}\}">c</figure-callout>}1}^2-x_{\mathrm{<figure-callout\; id="1"\; label="b"\; filenames="HSA00000344206800011.png,HSA00000344206800031.png"\; state="\{\{state\}\}">b</figure-callout>}1}^2+{\mathrm{<figure-callout\; id="1"\; label="y\; c"\; filenames="HSA00000344206800011.png,HSA00000344206800031.png"\; state="\{\{state\}\}">y</figure-callout>}}_c^1-{\mathrm{<figure-callout\; id="1"\; label="y\; b"\; filenames="HSA00000344206800011.png,HSA00000344206800031.png"\; state="\{\{state\}\}">y</figure-callout>}}_b^1+{\mathrm{<figure-callout\; id="1"\; label="z\; c"\; filenames="HSA00000344206800011.png,HSA00000344206800031.png"\; state="\{\{state\}\}">z</figure-callout>}}_c^1-{\mathrm{<figure-callout\; id="1"\; label="z\; b"\; filenames="HSA00000344206800011.png,HSA00000344206800031.png"\; state="\{\{state\}\}">z</figure-callout>}}_b^1+d_{b1i}^2-d_{c1i}^2\end{array}\right)$

Thereby obtain the positional information of trapped personnel.

The flow process of B1, described aid card connection control method is:

Step 3.1, aid card initialization, aid card is in the down channel listening state;

Step 3.2, judge whether aid card receives the instruction that wakes up that receiving instrument sends;

If do not receive and wake instruction up, then continue to judge whether to receive and wake instruction up;

If receive and wake instruction up, then enter step 3.3;

Step 3.3, execution back off algorithm are set and are inserted the request transmission time point, insert request and sequence number information in the transmission of transmission point turn-on time, open backoff counter;

If all aid cards all send the request of access at one time, receiving instrument just is difficult to obtain one by one and discern the access request of all aid cards, therefore needs aid card to set one at random and sends some turn-on time, and access request transmission time each other staggers.

Step 3.4, judge whether to receive the hypnosis instruction that contains this aid card sequence number; If receive the hypnosis instruction, then enter step 3.5;

Receiving instrument once activates an aid card, and other aid cards are avoided occurring signal and disturbed by hypnosis.

If do not receive the hypnosis instruction, judge then whether backoff counter reduces to zero, if do not reduce to zero, then return described step 3.4, if backoff counter reduces to zero, then switch to data feedback channel, send the access request that contains this aid card sequence number for n5 time continuously, switch to down channel, return described step 3.3;

Step 3.5, record send the sequence number of the receiving instrument of hypnosis instruction, close backoff counter, are in the down channel listening state;

If other regional receiving instrument is being worked, the access request that this response aid card is sent responds, and aid card can be got back to initial condition, continues to wait for.

If the receiving instrument of one's respective area is being worked, aid card is received the activation instruction or the hypnosis instruction of receiving instrument, all looks this receiving instrument and is the ownership receiving instrument, and only the instruction to this receiving instrument responds.

Step 3.6, judge whether to receive the activation instruction that contains this aid card sequence number, if do not receive activation instruction, judge then whether the time of waiting for activation instruction is overtime, if it is not overtime, then continue to judge whether to receive the activation instruction that contains this aid card sequence number, if wait for that the time of activation instruction is overtime, then return described step 3.1;

If receive activation instruction, then enter step 3.7;

Step 3.7, send this aid card canned data;

Step 3.8, judge whether to receive and contain releasing order of this aid card sequence number,, then return described step 3.1 if receive and release order;

Receiving instrument sends and releases order, and removes the attaching relation between receiving instrument and the aid card, and aid card can receive the information command of other receiving instruments.

If do not receive, then enter step 3.8;

Step 3.8, judgement wait for whether the time of releasing order is overtime, if wait for that the time of releasing order is not overtime, then return described step 3.6;

If wait for that the time of releasing order is overtime, then return described step 3.1.

Remarkable result of the present invention is: the accidental access method that a kind of disaster scene multi-functional life salvage system aid card is provided, specific environment after taking place at disaster especially, can effectively overcome existing cut-in method and the deficiency of localization method under disaster environment, reliably obtain the positional information and the personal information of trapped personnel.

Description of drawings

Fig. 1 is the structured flowchart of multi-functional life salvage system;

Fig. 2 is application scenarios description figure of the present invention, the zone that has a plurality of needs rescues in the disaster scene, zone shown in frame of broken lines among the figure, the aid card that on behalf of trapped personnel, the open circles in the rescue area wear, extra-regional PDA is the life signal receiving instrument, the life signal receiving instrument is carried out the aid card statistics and is obtained with information, and aid card 2 is according to receiving instrument instruction execution access procedure, the work that each PDA can independently not disturb;

Fig. 3 is an aid card statistics flow chart in the receiving instrument connection control method;

Fig. 4 is that aid card information is obtained flow chart in the receiving instrument connection control method;

Fig. 5 is an aid card connection control method flow chart;

Fig. 6 is that receiving instrument is determined trapped personnel schematic diagram to be positioned one by one, the aid card that the non-trapped personnel of figure hollow core circle representative is worn, filled circles, it is the life aid card that the representative of D point is activated, the representative of grey circle is by the life aid card of the life aid card of hypnosis and absence of vital signs, PDA represents the life signal receiving instrument, and A1, B1, C1 represent three measurement points of receiving instrument.

Embodiment

With regard to specific embodiment the present invention is described in further detail below.

As shown in Figure 1, 2: multi-functional life salvage system is made up of at least one life aid card and at least one life signal receiving instrument, the life aid card can send to the external world when disaster takes place and include the signal of wearing information such as personnel identity, and the life signal receiving instrument is implemented trapped personnel is located by the signal that receives.

Wherein the life aid card is provided with human body thermal infrared sensor module and heart acquisition sensor module;

The output of described human body thermal infrared sensor module is connected the thermal infrared input of the first low-power scm module;

The output of described heart acquisition sensor module is connected the electrocardio input of the first low-power scm module;

The modulation end of the described first low-power scm module is with first the wireless modulation-demodulation module is two-way is connected;

The described first wireless modulation-demodulation module is through first dual-mode antenna and described life signal receiving instrument radio communication;

Described life signal receiving instrument is provided with the second wireless modulation-demodulation module, and this second wireless modulation-demodulation module is through the 3rd dual-mode antenna and the described first dual-mode antenna radio communication;

The described second wireless modulation-demodulation module is also with second the low-power scm module is two-way is connected;

The video end of the described second low-power scm module is connected on the input of LCD driver module, and the output of LCD driver module is connected with the LCD display module;

The audio frequency end of the described second low-power scm module is connected on the digital input end of D/A modular converter;

The analog output of described D/A modular converter is connected on audio frequency filtering/amplification module input, and the output of described audio frequency filtering/amplification module is connected with loud speaker.

The data-interface end group of the described first low-power scm module is two-way to be connected with big capacity Flash memory.

The dual-tone multifrequency end of the described first low-power scm module is with first the dual-tone multifrequency module is two-way is connected;

The wireless receiving and dispatching end of the described first dual-tone multifrequency module is with first the analog-modulated demodulation module is two-way is connected;

The described first analog-modulated demodulation module is through second dual-mode antenna and described life signal receiving instrument radio communication;

Described life signal receiving instrument is provided with the second analog-modulated demodulation module, and this second analog-modulated demodulation module is through the 4th dual-mode antenna and the described second dual-mode antenna radio communication;

The two-way connection of wireless receiving and dispatching end of the described second analog-modulated demodulation module and the second dual-tone multifrequency module;

The two-way connection of dual-tone multifrequency end of the described second dual-tone multifrequency module and the described first low-power scm module.

Described life aid card also is provided with first power module, and this first power module is each unit module power supply in the described life aid card;

Described life signal receiving instrument also is provided with the second source module, and this second source module is each unit module power supply in the described life signal receiving instrument.

Shown in Fig. 3,4,5: the multi-functional life salvage system aid card accidental access method of a kind of disaster scene, its key is: be made up of receiving instrument 1 connection control method and aid card 2 connection control methods, wherein receiving instrument 1 connection control method comprises that aid card is added up flow process and aid card information is obtained flow process, and realization receiving instrument 1 is communicated by letter with the wireless interaction of aid card 2.

As shown in Figure 3: the aid card of A1, described receiving instrument 1 statistics flow process is according to following steps:

Step 1.1, receiving instrument 1 parameter initialization;

Step 1.2, the broadcasting of receiving instrument 1 down channel start and wake instruction n1 time up, wake the aid card 2 in receiving instrument 1 signal coverage up;

Step 1.3, receiving instrument 1 switch to up channel, enter listening period;

Step 1.4, receiving instrument 1 judge whether from the access request of aid card 2 and the sequence number of aid card 2, if receive the sequence number of the request of access and aid card 2, then write down the sequence number of aid card 2, this aid card 2 of hypnosis, listening period is counted the n zero clearing, enters step 1.5;

The initial value that listening period is counted n is zero.

If do not receive the sequence number of the request of access and aid card 2, then listening period is counted n=n+1, enters step 1.5;

Step 1.5, judge that listening period counts n and whether reach n2 time,, then return described step 1.3, enter new listening period if do not reach n2 time;

Reach n2 time if listening period is counted n, promptly n=n2 then enters step 1.6;

Step 1.6, judge whether the access request and the sequence number information of aid card 2, if insert request and sequence number information, then judging does not have subject of salvage;

If the request of access and sequence number information are arranged, then carry out the signal resolution and the quantity n3 statistics of aid card 2.

At the scene of searching and rescuing, can set a region of search in advance, and do at least three aid cards around this zone and add up flow process, by three beam searches, again the n3 that searches for three times is added up, find out the wherein on all four aid card 2 of sequence number information, just can be defined as the aid card 2 in this zone, the information of other information inconsistencies is the aid cards 2 outside the region of search.Through the n3 bar information after the screening is aid card 2 resource informations more accurately.。

As shown in Figure 4: the aid card information of A2, described receiving instrument 1 is obtained flow process according to following steps:

Arbitrary information in step 2.1, the selected n3 bar aid card 2 is extracted the sequence number of this aid card 2;

Step 2.2, activate this aid card 2, keep hypnosis other aid card according to aid card 2 sequence numbers;

Step 2.3, judge whether to obtain the information of described activation aid card 2, if do not obtain the information of described activation aid card 2, judge whether that then this aid card 2 has been carried out n4 time to be activated, if also do not arrive n4 activation, then return described step 2.2, activate if carried out n4 time, then enter step 2.4;

If obtained the information of described activation aid card 2, then directly enter step 2.4;

Step 2.4, discharge this aid card 2;

Step 2.5, judge whether to finish the release of all n3 bar aid cards 2; If do not finish, then return described step 2.1;

If finished the release of n3 bar aid card 2, the information of then finishing is obtained;

Aid card information is obtained flow process and also need be repeated at least three positions of search and rescue region, and main cause is:

As shown in Figure 6: the life signal receiving instrument is in sensing point A ₁, B ₁, C ₁Receive each the life aid card communication signal and the storage that are waken up successively in n3 the life aid card, estimate the distance vector d of each life aid card and life signal receiving instrument according to received signal intensity _A1, d _B1, d _C1

Again according to described distance vector d _A1, d _B1, d _C1In element d _A1i, d _B1i, d _C1i, adopt trilateration to calculate the positional information of trapped personnel;

Sensing point A ₁, sensing point B ₁, sensing point C ₁Coordinate be respectively (x _A1, y _A1, z _A1), (x _B1, y _B1, z _B1), (x _C1, y _C1, z _C1), the coordinate of life aid card be (z), there are following formula in x, y:

$\left\{\begin{array}{c}\sqrt{{\left(x-x_{a1}\right)}^2+{(y-y_{a1})}^2+{(z-z_{a1})}^2}=d_{a1i}\\ \sqrt{{(x-x_{b1})}^2+{(y-y_{b1})}^2+{(z-z_{b1})}^2}=d_{b1i}\\ \sqrt{{(x-x_{c1})}^2+{(y-y_{c1})}^2+{(z-z_{c1})}^2}=d_{c1i}\end{array}\right.$

The coordinate that can obtain trapped personnel is:

$\left(\begin{array}{c}x\\ y\\ z\end{array}\right)={\left(\begin{array}{ccc}2(x_{b1}-x_{a1})& 2(y_{b1}-y_{a1})& 2(z_{b1}-z_{a1})\\ 2(x_{c1}-x_{a1})& 2(x_{c1}-x_{a1})& 2(x_{c1}-x_{a1})\\ 2(x_{c1}-x_{b1})& 2(x_{c1}-x_{b1})& 2(x_{c1}-x_{b1})\end{array}\right)}^{-1}\left(\begin{array}{c}{\mathrm{<figure-callout\; id="1"\; label="x\; b"\; filenames="HSA00000344206800011.png,HSA00000344206800031.png"\; state="\{\{state\}\}">x</figure-callout>}}_b^1-x_{a1}^2+{\mathrm{<figure-callout\; id="1"\; label="y\; b"\; filenames="HSA00000344206800011.png,HSA00000344206800031.png"\; state="\{\{state\}\}">y</figure-callout>}}_b^1-y_{a1}^2+{\mathrm{<figure-callout\; id="1"\; label="z\; b"\; filenames="HSA00000344206800011.png,HSA00000344206800031.png"\; state="\{\{state\}\}">z</figure-callout>}}_b^1-z_{a1}^2+d_{a1i}^2-d_{b1i}^2\\ x_{\mathrm{<figure-callout\; id="1"\; label="c"\; filenames="HSA00000344206800011.png,HSA00000344206800031.png"\; state="\{\{state\}\}">c</figure-callout>}1}^2-x_{a1}^2+{\mathrm{<figure-callout\; id="1"\; label="y\; c"\; filenames="HSA00000344206800011.png,HSA00000344206800031.png"\; state="\{\{state\}\}">y</figure-callout>}}_c^1-y_{a1}^2+{\mathrm{<figure-callout\; id="1"\; label="z\; c"\; filenames="HSA00000344206800011.png,HSA00000344206800031.png"\; state="\{\{state\}\}">z</figure-callout>}}_c^1-z_{a1}^2+d_{a1i}^2-d_{c1i}^2\\ x_{\mathrm{<figure-callout\; id="1"\; label="c"\; filenames="HSA00000344206800011.png,HSA00000344206800031.png"\; state="\{\{state\}\}">c</figure-callout>}1}^2-{\mathrm{<figure-callout\; id="1"\; label="x\; b"\; filenames="HSA00000344206800011.png,HSA00000344206800031.png"\; state="\{\{state\}\}">x</figure-callout>}}_b^1+{\mathrm{<figure-callout\; id="1"\; label="y\; c"\; filenames="HSA00000344206800011.png,HSA00000344206800031.png"\; state="\{\{state\}\}">y</figure-callout>}}_c^1-{\mathrm{<figure-callout\; id="1"\; label="y\; b"\; filenames="HSA00000344206800011.png,HSA00000344206800031.png"\; state="\{\{state\}\}">y</figure-callout>}}_b^1+{\mathrm{<figure-callout\; id="1"\; label="z\; c"\; filenames="HSA00000344206800011.png,HSA00000344206800031.png"\; state="\{\{state\}\}">z</figure-callout>}}_c^1-{\mathrm{<figure-callout\; id="1"\; label="z\; b"\; filenames="HSA00000344206800011.png,HSA00000344206800031.png"\; state="\{\{state\}\}">z</figure-callout>}}_b^1+d_{b1i}^2-d_{c1\mathrm{<figure-callout\; id="2"\; label="i"\; filenames="HSA00000344206800011.png"\; state="\{\{state\}\}">i</figure-callout>}}^2\end{array}\right)$

Thereby obtained the accurate location information of trapped personnel.

As shown in Figure 5: the flow process of B1, described aid card 2 connection control methods is:

Step 3.1, aid card 2 initialization, aid card 2 is in the down channel listening state;

Step 3.2, judge whether aid card 2 receives the instruction that wakes up that receiving instrument 1 sends;

If do not receive and wake instruction up, then continue to judge whether to receive and wake instruction up;

If receive and wake instruction up, then enter step 3.3;

Step 3.3, execution back off algorithm are set and are inserted the request transmission time point, insert request and sequence number information in the transmission of transmission point turn-on time, open backoff counter;

If all aid cards 2 all send the request of access at one time, receiving instrument 1 is difficult to obtain one by one and discern the access request of all aid cards 2, therefore needs aid card 2 to set one at random and sends some turn-on time, and access request transmission time each other staggers.

Step 3.4, judge whether to receive the hypnosis instruction that contains this aid card 2 sequence numbers; If receive the hypnosis instruction, then enter step 3.5;

Receiving instrument 1 once activates an aid card 2, and other aid card 2 is avoided occurring signal and disturbed by hypnosis.

If do not receive the hypnosis instruction, judge then whether backoff counter reduces to zero, if do not reduce to zero, then return described step 3.4, if backoff counter reduces to zero, then switch to data feedback channel, send the access request that contains this aid card 2 sequence numbers for n5 time continuously, switch to down channel, return described step 3.3;

Step 3.5, record send the sequence number of the receiving instrument 1 of hypnosis instruction, close backoff counter, are in the down channel listening state;

Be set at ownership receiving instrument 1.

If other regional receiving instrument 1 is being worked, the access request that this response aid card 2 is sent responds, and aid card 2 can be got back to initial condition, continues to wait for.

If the receiving instrument of one's respective area 1 is being worked, aid card 2 is received the activation instruction or the hypnosis instruction of receiving instrument 1, all looks this receiving instrument 1 and is ownership receiving instrument 1, and only the instruction to this receiving instrument 1 responds.

Step 3.6, judge whether to receive the activation instruction that contains this aid card sequence number, if do not receive activation instruction, judge then whether the time of waiting for activation instruction is overtime, if it is not overtime, then continue to judge whether to receive the activation instruction that contains this aid card sequence number, if wait for that the time of activation instruction is overtime, then return described step 3.1;

If receive activation instruction, then enter step 3.7;

Step 3.7, send this aid card canned data;

Step 3.8, judge whether to receive and contain releasing order of this aid card sequence number, if receive and release order, as step 3.1 as described in then returning;

Receiving instrument 1 sends and releases order, and removes the attaching relation between receiving instrument 1 and the aid card 2, and aid card 2 can receive the information command of other receiving instruments 1.

If do not receive, then enter step 3.8;

Step 3.8, judgement wait for whether the time of releasing order is overtime, if wait for that the time of releasing order is not overtime, then return described step 3.6;

If wait for that the time of releasing order is overtime, then return described step 3.1.

Claims (1)

1. disaster scene multi-functional life salvage system aid card accidental access method, it is characterized in that: communicate by letter with aid card (2) wireless interaction by receiving instrument (1), be made up of receiving instrument (1) connection control method and aid card (2) connection control method, wherein receiving instrument (1) connection control method comprises that aid card is added up flow process and aid card information is obtained flow process;

The aid card of A1, described receiving instrument (1) statistics flow process is according to following steps:

Step 1.1, receiving instrument (1) parameter initialization;

Step 1.2, the broadcasting of receiving instrument (1) down channel start and wake instruction n1 time up, wake the aid card (2) in receiving instrument (1) signal coverage up;

Step 1.3, receiving instrument (1) switch to up channel, enter listening period;

Step 1.4, receiving instrument (1) judge whether the sequence number from the access request of aid card (2) and aid card (2), if receive the sequence number of the request of access and aid card (2), then write down the sequence number of aid card (2), this aid card of hypnosis (2), listening period is counted the n zero clearing, enters step 1.5;

If do not receive the sequence number of the request of access and aid card (2), then listening period is counted n=n+1, enters step 1.5;

Step 1.5, judge that listening period counts n and whether reach n2 time,, then return described step 1.3, enter new listening period if do not reach n2 time;

Reach n2 time if listening period is counted n, then enter step 1.6;

Step 1.6, judge whether the access request and the sequence number information of aid card (2), if insert request and sequence number information, then judging does not have subject of salvage;

If the request of access and sequence number information are arranged, then carry out the signal resolution and the quantity n3 statistics of aid card (2);

The aid card information of A2, described receiving instrument (1) is obtained flow process according to following steps:

Arbitrary information in step 2.1, the selected n3 bar aid card (2) is extracted the sequence number of this aid card (2);

Step 2.2, activate this aid card (2), keep hypnosis other aid card according to aid card (2) sequence number;

Step 2.3, judge whether to obtain the information of the aid card (2) of described activation, if do not obtain the information of described activation aid card (2), judge whether that then this aid card (2) has been carried out n4 time to be activated, if also do not arrive n4 activation, then return described step 2.2, activate if carried out n4 time, then enter step 2.4;

If obtained the information of described activation aid card (2), then directly enter step 2.4;

Step 2.4, discharge this aid card (2);

Step 2.5, judge whether to finish the release of all n3 bar aid cards (2); If do not finish, then return described step 2.1;

If finished the release of n3 bar aid card (2), the information of then finishing is obtained;

The flow process of B1, described aid card (2) connection control method is:

Step 3.1, aid card (2) initialization, aid card (2) is in the down channel listening state;

Step 3.2, judge whether aid card (2) receives the instruction that wakes up that receiving instrument (1) sends;

Wake instruction up if confiscate, then continue to judge whether to receive and wake instruction up;

If receive and wake instruction up, then enter step 3.3;

Step 3.3, execution back off algorithm are set and are inserted the request transmission time point, insert request and sequence number information in the transmission of transmission point turn-on time, open backoff counter;

Step 3.4, judge whether to receive the hypnosis instruction that contains this aid card (2) sequence number; If receive the hypnosis instruction, then enter step 3.5;

If do not receive the hypnosis instruction, judge then whether backoff counter reduces to zero, if do not reduce to zero, then return described step 3.4, if backoff counter reduces to zero, then switch to data feedback channel, send n5 time continuously and contain the access request of this aid card (2) sequence number and switch to down channel, return described step 3.3;

Step 3.5, record send the sequence number of the receiving instrument (1) of hypnosis instruction, close backoff counter, are in the down channel listening state;

Step 3.6, judge whether to receive the activation instruction that contains this aid card sequence number, if do not receive activation instruction, judge then whether the time of waiting for activation instruction is overtime, if it is not overtime, then continue to judge whether to receive the activation instruction that contains this aid card sequence number, if wait for that the time of activation instruction is overtime, then return described step 3.1;

If receive activation instruction, then enter step 3.7;

Step 3.7, send this aid card canned data;

Step 3.8, judge whether to receive and contain releasing order of this aid card sequence number,, then return described step 3.1 if receive and release order;

If do not receive, then enter step 3.8;

Step 3.8, judgement wait for whether the time of releasing order is overtime, if wait for that the time of releasing order is not overtime, then return described step 3.6;

If wait for that the time of releasing order is overtime, then return described step 3.1.

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