CN102196395B - Post-disaster rescue emergency control mode starting method and mobile terminal - Google Patents
Post-disaster rescue emergency control mode starting method and mobile terminal Download PDFInfo
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- CN102196395B CN102196395B CN2011101402677A CN201110140267A CN102196395B CN 102196395 B CN102196395 B CN 102196395B CN 2011101402677 A CN2011101402677 A CN 2011101402677A CN 201110140267 A CN201110140267 A CN 201110140267A CN 102196395 B CN102196395 B CN 102196395B
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Abstract
The invention discloses a post-disaster rescue emergency control mode starting method and a mobile terminal. The method comprises the following steps of: presetting mutually orthogonal two paths of control signals; receiving activation control signals, and performing related operation on the activation control signals and the two paths of control signals respectively; and when the results of the related operation of the activation control signals and the two paths of control signals are opposite is determined, starting an emergency control mode. By adopting the scheme provided by the invention, the time of starting the emergency control mode can be reasonably judged, furthermore, the algorithm of starting the emergency control mode can be started by judging according to multiple times of related operation results, and the sensitivity of a system is improved. By reasonably prolonging the related time to improve the receiving sensitivity in the embodiment, the probability that the mobile terminal monitors the activation control signals is greatly increased, so that the saved probability of trapped persons is increased.
Description
Technical field
The present invention relates to the post-disaster search and rescue technical field, relate in particular to a kind of post-disaster search and rescue emergency control pattern startup method and portable terminal.
Background technology
Natural calamity has the moment generation, destroys characteristics such as violent, that monitoring and prediction is difficult, social influence is far-reaching, and for example, disasters such as destructive strong earthquake, landslide cause huge harm and loss for national economic development and people life property safety.Natural calamity example many times proves both at home and abroad, and loss is extremely important the emergency relief technical merit for disaster mitigation after the calamity.
China is also very weak at disaster emergency relief technical elements at present, mainly relies on manpower, rescue dogs and life-detection instrument to carry out life detection, to seek the survivor.Manpower and rescue dogs detection efficient are lower, and influenced seriously by surrounding enviroment.Existing life-detection instrument all exist be subjected to site environment influence big, the search volume scope is little, search speed slow, lack shortcomings such as quick stationkeeping ability, does not satisfy after the calamity ruins pile things on trapped personnel demand of search and rescue fast on a large scale far away.
To be subjected to environmental impact serious in order to solve in the prior art life-detection instrument, causes the low problem of search efficiency, a kind ofly is suggested based on life detection method and system after the calamity of mobile phone.This system is made up of mobile phone (portable terminal) and some life-detection instruments (a main survey meter and some from survey meter).After the condition of a disaster took place, trapped personnel mobile phone (portable terminal) was if search is cried for help less than normal communications signal, and then the signal that sends of mobile terminal to search life-detection instrument is set up urgent link link.Portable terminal is encoded self identification sign indicating number and life-information automatically and is sent to life-detection instrument, life-detection instrument is according to the unique identification of the portable terminal in the distress signal, determine portable terminal and carry out positioning action, finally determine the position of trapped personnel, effectively sue and labour.
In this system, under the situation that signal to noise ratio becomes very low behind the barriers such as life-detection instrument signal process body of wall, portable terminal is set up in the process that links with life-detection instrument, lack a kind of effective activation algorithm, portable terminal can't effectively detect, judge the activation control signal that life-detection instrument sends and set up link with it and carry out follow-up positioning action.
Summary of the invention
The embodiment of the invention provides a kind of post-disaster search and rescue emergency control pattern startup method and portable terminal, thereby can't effectively detect the problem that activation control signal starts the emergency control pattern in the prior art in order to solve.
A kind of post-disaster search and rescue emergency control pattern startup method, this method comprises:
Default mutually orthogonal two path control signal;
Receive activation control signal, carry out related operation with described two path control signal respectively;
When determining that the result of described activation control signal and two path control signal related operation is opposite, start the emergency control pattern.
Preferably, this method also comprises:
Described activation control signal is compared with the related operation result's of two path control signal absolute value;
When definite described comparative result during less than threshold value M, start the emergency control pattern.
Preferably, this method also comprises:
Described activation control signal and two path control signal are carried out the computing of N correlations respectively;
When the result who determines the computing of N correlations is contrary, start the emergency control pattern.
Preferably, described N is the number of times of serial correlation computing, or sets the number of times of described related operation in the duration; The value of N is set according to actual needs, and the preferable value of serial correlation operation times is 10.
Preferably, described reception activation control signal comprises:
In the time can't receiving normal communications signal, search also receives activation control signal.
Preferably, when determining that detecting pattern is met an urgent need in startup, receive activation control signal.
A kind of portable terminal is applied to post-disaster search and rescue, and this portable terminal comprises memory cell, receiving element, arithmetic element and pattern start unit, wherein,
Described memory cell is used for default mutually orthogonal two path control signal and storage;
Described receiving element is used for receiving activation control signal and sending described arithmetic element;
Described arithmetic element is used for described activation control signal is carried out related operation with described two path control signal respectively, and operation result is sent described pattern start unit;
Described pattern start unit is used for judging whether the operation result of two path control signal is opposite, if start the emergency control pattern.
Preferably, this portable terminal also comprises first counting unit, is used for default threshold value M;
When described pattern start unit determines that the related operation result's of described activation control signal and two path control signal absolute value differs less than threshold value M, start the emergency control pattern; Perhaps, when the operation result of described pattern start unit N definite two path control signal in default duration is opposite, start the emergency control pattern.
Preferably, this portable terminal also comprises second counting unit, is used for the frequency threshold value N of a default related operation;
When the operation result of described pattern start unit N continuous time definite two path control signal is opposite, start the emergency control pattern.
Preferably, this portable terminal also comprises monitoring means, is used for starting/closing emergent detecting pattern.
The embodiment of the invention has proposed a kind of post-disaster search and rescue emergency control pattern startup method, can be under the extremely low situation of signal to noise ratio, after receiving emergency control mode activation control signal, by carrying out related operation with the mutually orthogonal control signal of forwards/reverse two-way, thereby judge the opportunity that the emergency control pattern starts.Further, thereby can judge the algorithm that starts the emergency control pattern according to related operation result repeatedly, improve the sensitivity of system.Meanwhile, the embodiment of the invention improves receiving sensitivity by reasonable prolongation correlation time, and the probability that makes portable terminal monitor activation control signal increases greatly, thereby the quilt that has increased trapped personnel is rescued probability.
Description of drawings
Fig. 1 is the main realization principle flow chart of the embodiment of the invention;
Fig. 2 provides the structural representation of portable terminal 1 for the embodiment of the invention;
Fig. 3 provides the structural representation of portable terminal 2 for the embodiment of the invention;
Fig. 4 provides the structural representation of portable terminal 3 for the embodiment of the invention.
Embodiment
Because in the existing post-disaster search and rescue technical scheme, need to set up to link then between life-detection instrument and the portable terminal and just can carry out follow-up work such as search and rescue location, the prerequisite of setting up link is the activation control signal that the life-detection instrument emission must be searched for and receive to portable terminal accurately, start the emergency control pattern, thereby the extremely low activation control signal of signal to noise ratio how to search for and receive the life-detection instrument emission accurately from noisy background noise is the problem that the embodiment of the invention is mainly paid close attention to.
The portable terminal of embodiment of the invention indication can be a kind of terminal equipment of embedded correlation function module, also can be improved mobile phone terminal, by built-in correlation module in mobile phone terminal, finishes correlation function.Take full advantage of the popularization of mobile phone terminal, finish post-disaster search and rescue work.
Be explained in detail to the main realization principle of embodiment of the invention technical scheme, embodiment and to the beneficial effect that should be able to reach below in conjunction with each accompanying drawing.
As shown in Figure 1, the main realization principle process of the embodiment of the invention is as follows:
In order to judge the signal activation control signal whether life-detection instrument sends that receives accurately, the control signal of the default two-way quadrature of portable terminal is designated as forward road control signal and reverse road control signal.Suppose that forward road control signal is identical with signal to be detected, reverse road control signal is quadrature with it, and then under ideal state, correlated results obtained positive maximum after forward road control signal was correlated with, and oppositely the road control signal obtains negative maximum.
Portable terminal detects and receives activation control signal, and carries out related operation with the forwards/reverse two path control signal respectively.The method of related operation can adopt multiple existing methods such as integration method, repeats no more herein.
Under the situation of actual environment very noisy, when the activation control signal of doping noise carried out related operation, if forward road control signal correlated results is being for just, so because oppositely the road control signal is anti-phase fully, the result was certainly for bearing; If forward road control signal is for negative, so oppositely the road control signal is for just.Can determine that with this portable terminal enters the state of emergency, start the emergency control pattern, carry out subsequent operations such as automatic life detection.
Especially, portable terminal is not at every moment to monitor to receive the activation control signal that life-detection instrument sends, but when judgement can't receive normal signal of communication, just begins search and receive activation control signal.
Especially, can be used for the emergent detecting pattern of On/Off in the inner embedded module of portable terminal, only when detecting pattern was met an urgent need in unlatching, portable terminal just can be when not receiving normal communications signal, and search also receives activation control signal.Here, the emergent detecting pattern of On/Off can independently be set according to user's needs, and can adjust at any time.
After activation control signal and two path control signal related operation, need the result of related operation be compared, if the result of forwards/reverse two path control signal difference related operation is opposite, illustrate that then portable terminal enters the state of emergency, need to start the emergency control pattern.If the forwards/reverse two path control signal result of related operation respectively is not opposite, then need to continue monitoring and receive activation control signal, carry out related operation again.
Here, the result of related operation positive and negative refers to symbol positive and negative of operation result, thereby the related operation result here is opposite, in other words, and the result's of two path control signal related operation opposite in sign.
Especially, in order to guarantee the accuracy of judged result, when the related operation result of forwards/reverse two path control signal is opposite, whether the absolute value that also needs to judge the result of this related operation differs greatly, if differ greatly, still think that the result who judges is insincere, need to continue monitoring and receive activation control signal, carry out related operation again.
General, can set a threshold value M, when the difference of forwards/reverse two paths of signals related operation result's absolute value during less than threshold value M, think that portable terminal enters the state of emergency, need to start the emergency control pattern.Otherwise, when the difference of forwards/reverse two paths of signals related operation result's absolute value during more than or equal to threshold value M, need to continue monitoring and receive activation control signal, carry out related operation again.The threshold value M here sets according to actual needs, and can adjust as required.
Here, for the calculating of the difference of two path control signal related operation result's absolute value, carry out on the opposite basis of two path control signal related operation result confirming, if the result of related operation is not opposite, then there is no need to carry out follow-up operation.
Especially, for the accuracy that guarantees to judge, generally need to set a threshold value N, the activation control signal that receives is carried out the computing of N correlations with the forwards/reverse two path control signal respectively, and the result of comparison operation, when having only the result of N correlations computing to be contrary, just be defined as portable terminal and enter the state of emergency, start the emergency control pattern.
General, the N here can be the number of times of related operation in the duration of setting, as long as have the result of N correlations computing opposite in the duration of setting, just can determine to start the emergency control pattern.Another situation, N can be the number of times of continuous related operation, that is to say, result that must the computing of N continuous correlations is opposite the time, could determine to start the emergency control pattern.The value of N can be set according to actual conditions, and can adjust as required.In the practical application, the value of serial correlation operation times N can be 10.
For existing CDMA mobile communication system commonly used, the end level of making an uproar under the normal temperature situation is-113dBm/1.2288M, consider the fluctuating level of making an uproar at the bottom of the wireless environment of the receiver noise factor of 5dB and 2dB, thus under the normal condition, the CDMA noise should be-106dBm about.
Consider that existing portable terminal crystal oscillator is in 15ppm, then behind the 26.64ms portable terminal time possible deviation may to reach 400ns (be half-chip, 1.2288M code check), along with the chip time migration of portable terminal transmission signal, the gain effect of the longer time of integration obviously descends.Comprehensive above factor, the time of activation control signal and forwards/reverse two path control signal related operation is elected 10ms as, can reach to obtain the 40dB storage gain.General, receiving sensitivity finally can reach-106dBm-40dB=-146dBm.And the lifting capacity of ultimate sensitivity can also be in allowed limits continues to increase according to the reasonable prolongation of correlation time.
Especially, be example with a practical application below, further specify the particular content of the embodiment of the invention.
After supposing one earthquake, a trapped personnel is bottled up by a reinforced concrete wall and an elevator door, and the mobile phone that trapped personnel is carried (portable terminal) needs outwards to signal must be through the obstruction of above-mentioned cement wall and elevator door.According to the related data record, CDMA frequency range (being about 800MHz) signal penetrates the about 23.8dBm of reinforced concrete wall loss, the about 25.2dBm of elevator door loss.
Mobile phone if there has not been normal communications signal, begins to search for emergency control mode activation control signal under the situation of opening the emergency monitoring pattern, down link penetrated the ruins surplus and was this moment:
The down link ruins penetrate surplus=positioning equipment transmitting power (Pt)+transmitter antenna gain (dBi) (Gt)+receiving antenna gain (Gr)-life detection mobile phone terminal receiving sensitivity (Ps)-space path loss (Lp).
General, wherein, life detection terminal positioning device transmitting power is about 0dBm (10W); Transmitter antenna gain (dBi) is about the 20dB forward; Receiving antenna gain is about the 2dB forward; The space path loss is about 65dB in the time of 50 meters, about 45dB in the time of 5 meters; Life detection mobile phone terminal receiving sensitivity is about-146dBm (establishing the speed that transmits is 1Mb, and be 10ms correlation time).
Here, the down link ruins that calculate penetrate surplus (50 meters apart from time) and are 40+20+2+146-65-23.8-25.2=102dB.
This sensitivity enough detects activation control signal accurately, and sets up link and carry out follow-up operation.
We suppose that the activation control signal of life-detection instrument emission is mapped as level: 1-1 1-1 1-1 1-1 1-1...; Forward road control signal is mapped as level: 1-1 1-1 1-1 1-1 1-1...; Oppositely the road control signal is mapped as level :-1 1-1 1-1 1-1 1-1 1....
Suppose in the process of each related operation have 10,000 chips to carry out correlation computations.So, if there is not noise jamming, clearly control signal correlated results in forward road is 10000, and oppositely the road control signal is-10000, namely is respectively maximum and minimum value.Adding under the noise conditions, the level of activation control signal may become: 100-50 100-100... still becomes in any case, so long as control signal and forwards/reverse two-way carry out when relevant, because two paths of signals is anti-phase fully, so must have one positive one negatively, portable terminal can be judged accordingly and starts the emergency control pattern.For preventing contingency, we get 10 as judging and threshold value, when positive negative test occurs ten times, can determine that portable terminal enters the emergency control pattern.So far pattern startup is finished.
Correspondingly, the embodiment of the invention also provides portable terminal, and as shown in Figure 2, this portable terminal comprises memory cell 100, receiving element 200, arithmetic element 300 and pattern start unit 400, and watch box is as follows:
The control signal of the default two-way quadrature of portable terminal is designated as forward road control signal and reverse road control signal.Suppose that forward road control signal is identical with signal to be detected, reverse road control signal is quadrature with it, and then under ideal state, correlated results obtained positive maximum after forward road control signal was correlated with, and oppositely the road control signal obtains negative maximum.
Receiving element 200 is used for receiving activation control signal and sending arithmetic element 300.
When life-detection instrument transmission activation control signal, portable terminal needs the corresponding activation control signal that receives.Receiving element 200 is used for receiving as required relevant activation control signal, and sends to arithmetic element 300.
Here, the result of related operation positive and negative refers to symbol positive and negative of operation result, thereby the related operation result here is opposite, in other words, and the result's of two path control signal related operation opposite in sign.
Preferably, as shown in Figure 3, also comprise first counting unit 500 in the portable terminal that above-described embodiment provides, be used for the difference threshold M of the absolute value of a default related operation.
When pattern start unit 400 determines that the related operation result's of activation control signal and two path control signal absolute value differs less than threshold value M, start the emergency control pattern.
Here, first counting unit 500 can be used for predetermined threshold value M, also can adjust threshold value M.Pattern start unit 400 with the comparison of the operation result of two path control signal after, the difference of absolute value of operation result of determining two path control signal illustrate that portable terminal enters the state of emergency during less than M, needs startup emergency control pattern.The purpose of doing like this can effectively improve the sensitivity that portable terminal starts the emergency control pattern.Here, for the calculating of the difference of two path control signal related operation result's absolute value, carry out on the opposite basis of two path control signal related operation result confirming, if the result of related operation is not opposite, then there is no need to carry out follow-up operation.
Preferably, also comprise second counting unit 600 in the portable terminal that above-described embodiment provides, be used for the frequency threshold value N of a default related operation.
When the operation result of pattern start unit 400 N continuous time definite two path control signal is opposite, start the emergency control pattern; Perhaps, when the operation result of pattern start unit 400 N definite two path control signal in default duration is opposite, start the emergency control pattern.
Here, second counting unit 600 can be used for predetermined threshold value N, also can adjust threshold value N.After the operation result comparison of pattern start unit 400 with two path control signal, when determining that the operation result of two path control signal is opposite, counter adds 1, and the related operation result of continuation comparison two path control signal next time, operation result up to N continuous time definite two path control signal is opposite, illustrate that then portable terminal enters the state of emergency, need to start the emergency control pattern.The purpose of doing like this can effectively improve the sensitivity that portable terminal starts the emergency control pattern.
General, the N here can be the number of times of related operation in the duration of setting, as long as have the result of N correlations computing opposite in the duration of setting, just can determine to start the emergency control pattern.Another situation, N can be the number of times of continuous related operation, that is to say, result that must the computing of N continuous correlations is opposite the time, could determine to start the emergency control pattern.The value of N can be set according to actual conditions, and can adjust as required.In the practical application, the value of N can be 10.
Preferably, as shown in Figure 4, also comprise detecting unit 700 in the portable terminal that above-described embodiment provides, be used for starting/closing emergent detecting pattern.
Detecting unit 700 can be according to user's needs startup or the emergent detecting pattern of turning-off mobile terminal, only under the prerequisite that starts emergent detecting pattern, the receiving element 200 of portable terminal, arithmetic element 300, pattern start unit 400, first counting unit 500 and second technical unit 600 can be started working.
Preferably, based on device shown in Figure 2, auxiliary unit additional among Fig. 3 to Fig. 4 can mutually combine, and obtains function portable terminal more comprehensively.
In sum, the embodiment of the invention has proposed a kind of post-disaster search and rescue emergency control pattern startup method, can be under the extremely low situation of signal to noise ratio, after receiving emergency control mode activation control signal, the signal mutually orthogonal by the forwards/reverse two-way carries out related operation, thereby judges the opportunity that the emergency control pattern starts.Further, thereby can judge the algorithm of opening the emergency control pattern according to related operation result repeatedly, improve the sensitivity of system.Meanwhile, the embodiment of the invention improves receiving sensitivity by reasonable prolongation correlation time, and the probability that makes portable terminal monitor activation control signal increases greatly, thereby the quilt that has increased trapped personnel is rescued probability.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. post-disaster search and rescue emergency control pattern startup method is characterized in that this method comprises:
Portable terminal is preset mutually orthogonal two path control signal; Described two path control signal wherein one tunnel identical with the activation control signal of life-detection instrument emission;
The described activation control signal that portable terminal will receive carries out related operation with described two path control signal respectively;
When portable terminal determines that the result of described activation control signal and two path control signal related operation is opposite, start the emergency control pattern, to set up linking between described life-detection instrument and the portable terminal, search and rescue the location.
2. the method for claim 1 is characterized in that, this method also comprises:
Described activation control signal is compared with the related operation result's of two path control signal absolute value;
When definite described comparative result during less than threshold value M, start the emergency control pattern.
3. method as claimed in claim 1 or 2 is characterized in that, this method also comprises:
Described activation control signal and two path control signal are carried out the computing of N correlations respectively;
When the result who determines the computing of N correlations is contrary, start the emergency control pattern.
4. method as claimed in claim 3 is characterized in that, described N is the number of times of serial correlation computing, or sets the number of times of described related operation in the duration; The value of N is set according to actual needs, and the preferable value of serial correlation operation times is 10.
5. the method for claim 1 is characterized in that, described reception activation control signal comprises:
In the time can't receiving normal communications signal, search also receives activation control signal.
6. as claim 1 or 5 described methods, it is characterized in that, when determining that detecting pattern is met an urgent need in startup, receive activation control signal.
7. a portable terminal is applied to post-disaster search and rescue, it is characterized in that, this portable terminal comprises memory cell, receiving element, arithmetic element and pattern start unit, wherein,
Described memory cell is used for default mutually orthogonal two path control signal and storage; Described two path control signal wherein one tunnel identical with the activation control signal of life-detection instrument emission;
Described receiving element is used for receiving activation control signal and sending described arithmetic element;
Described arithmetic element is used for described activation control signal is carried out related operation with described two path control signal respectively, and operation result is sent described pattern start unit;
Described pattern start unit is used for judging whether the operation result of two path control signal is opposite, if startup emergency control pattern to set up linking between described life-detection instrument and the portable terminal, is searched and rescued the location.
8. portable terminal as claimed in claim 7 is characterized in that, this portable terminal also comprises first counting unit, is used for default threshold value M;
When described pattern start unit determines that the related operation result's of described activation control signal and two path control signal absolute value differs less than threshold value M, start the emergency control pattern.
9. as claim 7 or 8 described portable terminals, it is characterized in that this portable terminal also comprises second counting unit, be used for the frequency threshold value N of a default related operation;
When the operation result of described pattern start unit N continuous time definite two path control signal is opposite, start the emergency control pattern; Perhaps, when the operation result of described pattern start unit N definite two path control signal in default duration is opposite, start the emergency control pattern.
10. portable terminal as claimed in claim 7 is characterized in that, this portable terminal also comprises monitoring means, is used for starting/closing emergent detecting pattern.
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| CN101877682A (en) * | 2009-04-29 | 2010-11-03 | 雷凌科技股份有限公司 | Method for detecting state of transmission channel and wireless communication system |
| EP2259084A1 (en) * | 2009-06-03 | 2010-12-08 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method and wireless device for detecting a movement |
| CN101917692A (en) * | 2010-06-17 | 2010-12-15 | 吕笑 | Mobile terminal, life detection instrument, post-disaster search and rescue system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101877682A (en) * | 2009-04-29 | 2010-11-03 | 雷凌科技股份有限公司 | Method for detecting state of transmission channel and wireless communication system |
| EP2259084A1 (en) * | 2009-06-03 | 2010-12-08 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method and wireless device for detecting a movement |
| CN101917692A (en) * | 2010-06-17 | 2010-12-15 | 吕笑 | Mobile terminal, life detection instrument, post-disaster search and rescue system and method |
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