CN101673453B - Anti-lose anti-theft system and method thereof for searching target and regulating beacon energy grade - Google Patents
Anti-lose anti-theft system and method thereof for searching target and regulating beacon energy grade Download PDFInfo
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- CN101673453B CN101673453B CN2009101927894A CN200910192789A CN101673453B CN 101673453 B CN101673453 B CN 101673453B CN 2009101927894 A CN2009101927894 A CN 2009101927894A CN 200910192789 A CN200910192789 A CN 200910192789A CN 101673453 B CN101673453 B CN 101673453B
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Abstract
The invention relates to an anti-lose anti-theft system, comprising at least one pair of RF beacon transceivers; wherein one RF beacon transceiver is fixed or carried on target to be monitored and protected, the other RF beacon transceiver is carried on an operator in charge of protecting the target, the two RF beacon transceivers alternately transmit RF beacon, and when one RF beacon transceiver can not receive the RF beacon transmitted by the other RF beacon transceiver, the RF beacon transceiver gives an alarm. The anti-lose anti-theft system also has a search mode and function of intelligent regulation of RF beacon energy grade, and the invention respectively provides the method for searching a target and the method for intelligent regulation of RF beacon energy grade of the anti-lose anti-theft system. The anti-lose anti-theft system has low cost, small volume, convenient carrying, low energy consumption and wide application range.
Description
Technical field
The present invention relates to a kind of system that prevents that the stolen or pet of valuables, old man, child etc. from going astray from the group, relate in particular to a kind of anti-lose anti-theft system based on radio frequency beacon location technology.
Background technology
For preventing valuables stolen and old man, child or pet daily life needs such as go astray from the group; Exploitation is necessary based on the anti-lose anti-theft system of location technology; Learn in time that not only protected target gets into precarious position stolen or that go astray from the group; And, in time find this protection target, thereby prevent infringement or dangerous the generation through localization method.
Location technology commonly used at present is such as satellite positioning tech, base station location technology, wireless sensor network location technology or other location technologies; Basically all be then or other similar geometric models on the principle according to triangulation location; Measure certain several distance value in the geometric model through appropriate method; Confirm the relative position of target, thereby realize the purpose of location.Also have the Doppler wireless direction finding technology technological based on the radio direction finding (RDF) of directional antenna in addition, confirm target direction through these technology, and then find target with in early days.
The prior art defective:
Based on triangulation location then or the location technology of other similar geometric models; All need at first set up the huge facility that covers applied environment; Need depend on 24 satellites such as the GPS location technology around the different orbital motions of the earth; Though it is free that Current GPS is used, indoor grade can't receiving satellite signal the place, just can not locate.And based on the location technology of wireless sensor network, such as the RFID location technology, need at first set up several to receive base stations and be covered in whole applied environment, construction cost is high, system complex, and limited environment for use.
Equipment such as the radio direction finding (RDF) technology of employing directional antenna receives huge antenna and the restriction of receiver volume weight, makes it can only be used for steamer mostly, and is vehicle-mounted and airborne are not suitable for the product for civilian use, more can not accomplish portable use.
Doppler's wireless direction-finding technology equally also needs the bigger receiving antenna array of volume, and need to be equipped with expensive receiver, volume and the big limitations of price Doppler's wireless direction-finding The Application of Technology field.
Therefore, it is low preferably to develop a kind of cost, and the convenient application anti-lose anti-theft system is so that satisfy the daily life needs.
Summary of the invention
The purpose of this invention is to provide low, the simple and easy portable anti-lose anti-theft system of a kind of cost.
For realizing above-mentioned purpose; The present invention provides a kind of anti-lose anti-theft system; Comprise at least one pair of radio frequency beacon transceiver; Wherein a radio frequency beacon transceiver is fixed or is carried at by on the target of monitor protection, and another radio frequency beacon transceiver is carried on one's body the operator who has a responsibility for protecting target, and this alternately sends the less radio-frequency beacon each other to radio frequency beacon transceiver; When one of them radio frequency beacon transceiver did not receive the radio frequency beacon that another radio frequency beacon transceiver sends, this radio frequency beacon transceiver gave the alarm.
Concrete; This radio frequency beacon transceiver comprises a RF receiving and transmission module, a control treatment module, a human-machine interface module and a power supply; RF receiving and transmission module is used for receiving the instruction of self-controller; Produce and perhaps stop to produce the radio frequency beacon; And the radio frequency signal that receives the CF that sends out from another radio frequency beacon transceiver, and transform and be demodulated to original signal and be sent to this control treatment module, be connected with data-interface through the SPI communication interface between this RF receiving and transmission module and the control treatment module; The SPI communication interface is used for carrying out the configuration operation of control treatment module to RF receiving and transmission module, and data-interface is used for carrying out the data transmission of control treatment module to RF receiving and transmission module.
Preferably; This control treatment module also comprises beacon energy intelligence adjustment module; Energy value in order to regulate the less radio-frequency beacon that alternately sends each other between the radio frequency beacon transceiver is in an optimum capacity value; Wherein this optimum capacity value is meant in the predefined alarm range of operator, during the radio frequency beacon that can receive the other side mutually between the radio frequency beacon transceiver and sent, and the minimum energy value of this radio frequency beacon.
This anti-lose anti-theft system also has-search pattern; This system can get into search pattern after wherein a radio frequency beacon transceiver gives the alarm; The method of its ferret out comprises: step 1; One first radio frequency beacon transceiver is fixed in by on the monitored object, and this radio frequency beacon transceiver sends a radio frequency beacon according to the certain rule circulation; Step 2 is carried at one second radio frequency beacon transceiver and has a responsibility for protecting this by on one's body the operator of monitored object, in order to receiving the radio frequency beacon that sends out from this first radio frequency beacon transceiver, and shows radio frequency beacon reception condition; Step 3, the operator arbitrarily attempts all directions and walks about, and receives the radio frequency beacon that this first radio frequency beacon transceiver sends up to this second radio frequency beacon transceiver; Step 4, the operator attempts moving toward different direction, judges whether to receive the power of this radio frequency beacon or this radio frequency beacon, roughly to judge the direction of localizing objects; Step 5, the operator advances along the direction of the localizing objects that this is roughly judged, receives stronger radio frequency beacon signal up to this second radio frequency beacon transceiver; Step 6, repeating step four and step 5 successively, up to localizing objects in visual range.
In order to save energy consumption; This anti-theft anti-loss system also has the function that intelligence is regulated the radio frequency beacon energy grade of its emission; Its method of regulating beacon energy grade comprises step 1; Set an alarm range; During a pair of radio frequency beacon transceiver furthest of this anti-lose anti-theft system, the beacon minimum energy value when this sends beacon to receiving the other side between the radio frequency beacon transceiver each other is defined as the highest energy grade in this alarm range, and this is to radio frequency beacon transceiver when nearest; Beacon minimum energy value when this sends beacon to receiving the other side between the radio frequency beacon transceiver each other is defined as the minimum energy grade, between this highest energy grade and minimum energy grade, distributes the beacon of the different-energy grade of a predetermined number; Step 2, arbitrary radio frequency beacon transceiver are sent an energy grade and are higher than after the beacon of minimum energy grade, with the energy grade reduction one-level of next beacon to be sent; Step 3 judges whether next beacon can be received and reply by the other side, if then reduce the energy grade of the next beacon that will launch again; Step 4, repeating step three is minimum one-level up to the energy grade of the beacon of being launched.
The present invention also provides a kind of anti-lose anti-theft system to regulate the method for beacon energy grade; It comprises: step 1; Set an alarm range; In this alarm range during a pair of radio frequency beacon transceiver furthest of this anti-lose anti-theft system; Beacon minimum energy value when this sends beacon to receiving the other side between the radio frequency beacon transceiver each other is defined as the highest energy grade; When nearest, the beacon minimum energy value when this sends beacon to receiving the other side between the radio frequency beacon transceiver each other is defined as the minimum energy grade to radio frequency beacon transceiver for this, between this highest energy grade and minimum energy grade, distributes the beacon of the different-energy grade of a predetermined number; Step 2 is set the signal intensity displayed value thresholding of a radio frequency beacon, when arbitrary radio frequency beacon transceiver receives beacon; All read once the signal intensity displayed value of current beacon,, surpass the thresholding of this setting if this signal intensity displayed value is enough big; Then attempt reducing the energy grade that next time is about to the beacon of emission, judge then whether the beacon of this energy grade can be received by the other side, if can be received by the other side; Then continue to reduce the energy grade of beacon, up to the signal intensity displayed value less than this thresholding, if can not be received by the other side; The energy grade that then keeps current beacon, and the beacon emissions of constantly attempting reduction one-level energy.
The present invention provides a kind of anti-lose anti-theft system to regulate the method for beacon energy grade again; It comprises: step 1; Set an alarm range; In this alarm range during a pair of radio frequency beacon transceiver furthest of this anti-lose anti-theft system; Beacon minimum energy value when this sends beacon to receiving the other side between the radio frequency beacon transceiver each other is defined as the highest energy grade; When nearest, the beacon minimum energy value when this sends beacon to receiving the other side between the radio frequency beacon transceiver each other is defined as the minimum energy grade to radio frequency beacon transceiver for this, between this highest energy grade and minimum energy grade, distributes the beacon of the different-energy grade of a predetermined number; Step 2; Controlling this radio frequency beacon transceiver sends the incompatible replacement of a beacon group and sends single beacon; The beacon combination is made up of two adjacent single beacons of energy grade; Use beacon Sx and beacon S (x+1) expression respectively, the energy grade of beacon S (x+1) is higher than beacon Sx, and judges whether the other side can receive the beacon combination; Step 3 if can not receive Sx, but is received S (x-1), and then this radio frequency beacon transceiver keeps sending this beacon combination; Step 4; If can receive beacon Sx; Then the beacon combination is adjusted to S (x-1) and Sx, repeating step two can not receive the beacon S (x-n) that wherein energy grade is low up to the other side's radio frequency beacon transceiver; But can receive till the high beacon S (x-n+1) of energy grade, and make this radio frequency beacon transceiver keep sending this beacon combination S (x-n) and S (x-n+1); Step 5; If can not receive beacon S (x+1); Then the beacon combination is adjusted to S (x+1) and S (x+2), repeating step two can not receive the beacon S (x+m) that wherein energy grade is low up to the other side's radio frequency beacon transceiver; But can receive till the high beacon S (x+m+1) of energy grade, and make this radio frequency beacon transceiver keep sending this beacon combination S (x+m) and S (x+m+1).
Should have two kinds of patterns of alarm and search based on the anti-lose anti-theft system of radio frequency beacon location technology, and not need infrastructure, easy to use, cost is low; Volume is little, is easy to integrated; Applied range, for example large-scale indoor venue child/old men such as GPS blind area, market, exhibition venue, supermarket, stadium, hospital, cinema are anti-loses or article anti-theft, and pet is anti-loses etc.; Its intelligence is regulated the function of beacon energy grade, ensures that it is low in energy consumption, and the just sustainable power supply of button cell for a long time.
Description of drawings
Fig. 1 is the less radio-frequency beacon transceiver function module map that the present invention's one preferred embodiment provides;
Fig. 2 is the circuit diagram of the chip that RF receiving and transmission module adopts in the less radio-frequency beacon transceiver among Fig. 1;
Fig. 3 is the energy pulse sequence synoptic diagram of less radio-frequency beacon transceiver emission among Fig. 1;
Fig. 4 is a pulse train energy distribution area schematic;
Fig. 5 is the method synoptic diagram that adopts less radio-frequency beacon transceiver location; And
Fig. 6 is the synoptic diagram the when searchers is further near localizing objects among Fig. 5.
Embodiment
Specify the structure and the principle of the anti-lose anti-theft system that the present invention's one preferred embodiment provided below in conjunction with diagram.But embodiment only is used for explaining summary of the invention, and does not limit claim scope of the present invention.
The anti-lose anti-theft system that this embodiment provides comprises that one is fixed or is carried at by the first radio frequency beacon transceiver (being called for short first machine) on the monitor protection target, and is carried at operator's second radio frequency beacon transceiver (being called for short second machine) on one's body.This first machine and second machine all have the function of the radiofrequency signal of transmitting and receiving; And alternately send beacon between the two each other, promptly first machine sends beacon, and second machine receives after the beacon from first machine; Then launch beacon to first machine; First machine receives after the beacon from second machine, and continues to send beacon to second machine, so circulation.The beacon that this first machine and second machine are launched can be the same; But for fear of particular surroundings the influence that possibly cause; The beacon that they are launched separately also can be different, promptly carries different information, is that first machine or second machine emit with differentiation.
Second machine can be through the wireless mode transmitting control commands to first machine, and first machine of controlling is according to necessarily requiring work, such as the ON/OFF that can control first machine, and parameters such as the frequency of the wireless beacon that first machine of controlling emits, energy intensity, cycle.
As shown in Figure 1, radio frequency beacon transceiver comprises RF receiving and transmission module, control treatment module, human-machine interface module and power supply.RF receiving and transmission module and control treatment module; And the communication interface between control treatment module and the human-machine interface module can be any communication interface of actual use; In the present embodiment; Through SPI communication interface and general purpose I/O interface communication, pass through general purpose I/O interface communication between control treatment module and the human-machine interface module between RF receiving and transmission module and the control treatment module.
RF receiving and transmission module has the radio frequency beacon concurrently and receives and emission function.RF receiving and transmission module forms by following Fig. 2 structure based on the CC1020 of TI company chip and peripheral resolution element thereof in the present embodiment; The CC1020 chip of TI company has reception and emission function simultaneously; In addition, its CC1100 chip too, the RF receiving and transmission module that therefore forms based on the CC1100 chip also is applicable to the present invention; The formed RF receiving and transmission module of other circuit structures is also included within the present invention, and it is can launch the less radio-frequency beacon also can receive the less radio-frequency beacon and get final product at all.
Control treatment module can be based on the embedded system of 8,16 or 32 level controllers/processor, also can be other embedded systems, and it must comprise that at least one works in the SPI communication interface of holotype, and at least 3 with data I/O interface.
Human-machine interface module mainly is to be used for letting the operator judge whether beacon is launched or be received or be not received; Man-machine interface can be pointed out through " toot " sound and received a beacon; Also can point out and receive a beacon through LED light; The reception condition that can also show beacon through the mode of LCD display also is not received through hummer caution beacon.
The mode of man-machine interface; Can select different modes according to different application environments; All be to be used for prompting operation person to receive a beacon in a word, adopt CC1020 arrowband radio transmitting and receiving chip as the beacon receiver in the present embodiment, controller/processor module can be read the intensity of the wireless signal that receives through the SPI communication interface; Therefore in the present embodiment; Except can sound or LED come identification beacon through " toot ", also can shield to come the intensity level of shows signal through LCD, judge the reception condition of beacon.
In system works, first machine constantly sends beacon to second machine, and second machine is received after the beacon; Can return a beacon to first machine; First machine continue to send beacon then, and second machine is replied first machine after receiving the beacon that first machine sends again, and so the cycle goes on.Close between first machine and second machine; It is close between operator and the quilt protection target; When second machine is in the scope that beacon energy covered of first machine; Beacon between first machine and second machine receives and normally keeps down, and any one moves and causes that distance becomes big between them when first machine and second machine, surpasses the scope that energy covered of beacon; Make second machine or first machine any one when not receiving the beacon that the other side sends, the man-machine interface part on the side who does not receive will be reported to the police.In actual use; One machine is carried on the person; And another machine is placed on one's body object, pet of being guarded or the child/old man who needs protection, if wherein a machine does not receive the answer beacon from another machine within a certain period of time, then the part of the man-machine interface on this machine will produce corresponding actions; Such as hummer can activating alarm sound, perhaps LED light flicker etc.
The beacon that less radio-frequency beacon transceiver sends can be the rf pulse sequence that successively decreases successively of round-robin energy according to certain rules; The rule that pulse train is sent is as shown in Figure 3; Certain hour at interval between adjacent two pulse trains, each pulse train is made up of 5 beacon pulses again, one regular time of interval between these 5 beacon pulses; First beacon pulse energy in 5 beacon pulses is maximum; Second beacon pulse energy taken second place, and successively decreases successively, and to the last the energy of a beacon pulse is minimum.
Certainly, the beacon pulse number that each pulse train comprises is not limited to 5, and should set according to practical application effect; The time interval between the adjacent pulse sequence is also set according to practical application effect, is 2.5 seconds among the embodiment; The energy size interval of each pulse in the pulse train; Be set at first arteries and veins energy 0.01 milliwatt in an embodiment, second pulse energy 0.1 milliwatt, the 3rd pulse energy 1 milliwatt; The 4th pulse energy 5 milliwatts; The 5th pulse energy 10 milliwatts, the energy distribution state of setting according to other modes is still at this patent protection domain; The duration of each pulse in the pulse train is set at first pulse 1 second in the present embodiment, all the other 4 pulses 0.5 second, and other setting meanss are still at this patent protection domain; The time interval in the pulse train between each pulse is set at 1 second in the present embodiment, other setting meanss are still at this patent protection domain.
As shown in Figure 4, for each independent pulse train, the energy overlay area that first impulse radiation is come out is to border, 1 district, and second pulse energy covers border, 2 district, and the like, cover within the border, 5 district to the 5th pulse energy.A burst is just sent at the every interval of less radio-frequency beacon transmitter several seconds; Each sequence comprises 5 signal pulses, and the energy of these 5 pulses is and reduces gradually to distribute, and the energy of first pulse is maximum; Second pulse energy taken second place, and last pulse energy is minimum.Like this, when 5 pulses of a burst emit successively, be the near zone at center with less radio-frequency beacon transceiver position, just formed a scope and reduced the energy distribution of drawing close one by one to the center.This distribution mode is accomplished along with the emission of a burst and is finished, and and then interval less radio-frequency beacon transceiver in a few second is launched the next signal sequence again.Like this, the surrounding space at radio frequency beacon transceiver place has formed a wireless energy that successively decreases in gradient in time and covered, and the circulation of this coverage mode is being carried out.
In addition, the beacon that less radio-frequency beacon transceiver sends is the radio-frequency pulse with certain energy of schedule time circulation transmission at interval, each one schedule time of pulse persistance.Owing to the energy of beacon pulse can successively decrease along with the increase of space length; Therefore; When beacon was other radio-frequency pulse of energy level, the surrounding space at radio frequency beacon transceiver place had formed a wireless energy that successively decreases in gradient with the space and has covered; And along with the circulation of radio frequency beacon is sent, this coverage mode circulation is being carried out.
When fixing or be carried at the energy coverage of being left the beacon of another machine emission by first machine on the monitor protection target and any machine in operator's second machine on one's body of being carried at; Thereby do not receive the signal of another machine; Its human-machine interface module promptly gives the alarm, and there are danger stolen or that lost in caution operator or protected target.At this moment, the operator is the position of ferret out immediately, generally speaking; When just giving the alarm, protected target also nearby, the alarm song that first machine on the target sends also can be heard by the operator; The operator is through following sound, visual or call out and can also target be given for change; But if valuables when stolen the robber walk very fast, perhaps fail in time to notice alarm, protect target to leave the operator far the time; Can start the search positioning function of this radio frequency beacon transceiver, promptly get into its search pattern.
Introduce the localization method based on this anti-lose anti-theft system of radio frequency beacon location technology below in conjunction with diagram, below diagram is an example with system's transmission radio frequency beacon pulse train.
The operator at first holds its second machine that carries act and exceeds the crown, and high as far as possible, arbitrarily attempts all directions then and walks about; Till receiving first beacon, represent that second machine has been in the first area of the beacon that first machine that target carries emitted this moment, the operator notes the current general direction that moves; The operator at first was placed on second machine before the own chest and antenna was pressed close to about about the 2 centimetres distances of chest, puts 1 like Fig. 5 second seat in the plane according to method as shown in Figure 5 this moment; Then in the face of this direction continues to move,, stop to move to till stably receive first beacon; Health is turned over 180 degree, the direction that moved just now dorsad, keep second machine the invariant position of front and aerial position in the front 2 centimetres of left and right sides constant; Put 2 like Fig. 5 second seat in the plane; Check whether second machine also still can receive first beacon this moment, if can receive, and the quality of first beacon that observation post receives; If represent to receive a beacon through " toot " sound, then this beacon quality of reception is through " toot " react by the sonority of sound.If second machine is in the beacon quality at 2 places, position and before not turning round body; Second machine is compared when position 1, the beacon degradation, the direction that expression was moved just now is the orientation at target place just; Otherwise continue rotation through health; Use the same method,, judge the general orientation of target according to the quality of received beacon.
Method shown in Figure 5 is to utilize the attenuation of human body to radio frequency signal, and the directivity characteristics of 403MHz to 470MHz radio magnetic wave signal, carries out the judgement in orientation.
Stable search first beacon and confirm general orientation after, hand-held second machine of operator continues to move forward, till can receiving second beacon; As shown in Figure 6, adopt the position that uses the same method second machine and antenna and be placed on the front, health turns over 180 degree then; Whether the front and back received beacon number of contrast changes; If the beacon number that receives in the time of back to the direction of advancing just now reduces, then the expression direction of advancing just now is exactly a target direction, if perhaps the number of front and back beacon does not change; Then can be through being afraid of the quality of two disconnected received beacons; Judge target direction, the method for judgement is the same to be stated, little by little receives other beacons successively.When the operator progressively near target, second machine can receive after all beacons that first machine sends, and shows target this moment just in 10 meters radius of the position that the operator belongs to, to be easy to just find target at such scope human eye.
When beacon is one to have the radio-frequency pulse of certain energy, rather than during pulse train, searching method is also roughly the same, and the direction that the operator finds beacon intensity to strengthen promptly is the direction at target place.
In order to improve precision and the efficient of judging signal, also can confirm the target azimuth based on RSSI (Received Signal StrengthIndicator receives the intensity indication of signal) value.Based on digitized reception signal intensity indication; Be RSSI, substitute in the such scheme and judge the reception signal intensity through people's sensation, and with digitized signal strength information; Convert azimuth information to and intuitively show, can improve locating accuracy and efficient.The radio frequency beacon transceiver of this scheme, second machine that carries of operator especially, its human-machine interface module requires to increase the function of the RSSI value that beacon is provided, and adopts the LCD display module as its human-machine interface module usually.
Wherein the RF receiving and transmission module of second machine receives the less radio-frequency beacon of the CF that sends out from first machine, and calculates the RSSI value of current beacon simultaneously, is sent to control treatment module.Control treatment module can be based on the embedded system of 8,16 or 32 level controllers/processor; Also can be other embedded systems; It must comprise that at least one works in the SPI communication interface of holotype; And several number is used for the data communication between satisfied and RF receiving and transmission module and the LCD display module according to the I/O interface.The RSSI value that control treatment module will be accomplished the RSSI value of the current beacon that receives and the beacon that received before compares; Computer Processing algorithm through certain carries out analyzing and processing; Draw target direction information; Can also draw the information such as general distance of target, control treatment module is stored through the RSSI value to received beacon of a period of time, dynamically shows the change procedure of RSSI again through the LCD display module; This change procedure combines corresponding graphical interfaces, can improve the efficient of target search largely.The LCD display module can adopt existing graphic dot matrix LCD module, figure/character pattern LCD module or special segment encode Liquid Crystal Module customized; Mainly be used for the result of instant playback control treatment module; The RSSI value that comprises the beacon that receives; And show RSSI value change curve, and the general information such as target range of coming out of assessing, to confirm the target azimuth more easily and efficiently.
Because not only can the transmitting/receiving wireless beacon between first machine and second machine, can also utilize beacon to come mutual communication to transmit information, so in order to reduce the energy emission intensity of beacon, energy value that can dynamic and intelligent ground adjusting beacon between first machine and second machine.Do like this and on the one hand can save electric energy, also be of value in addition and reduce wireless radiation.Specific as follows:
At first set the maximum magnitude that institute will guard, i.e. alarm range, target is then reported to the police above this scope, otherwise does not report to the police.According to the size of alarm range, distribute a certain number of beacon energy grade then, the corresponding alarm range of beacon that energy grade is maximum, along with the dwindling of monitoring scope, beacon energy grade also reduces then.Carry the energy grade information of this beacon on the beacon of being launched.
Begin most first machine and second machine are all launched the beacon of least energy intensity, if first machine and the second machine close, they can both normally receive and dispatch beacon separately so, so can not report to the police.If wherein any one moves for first machine and second machine; Cause distance between them to surpass the scope that is covered of this minimum beacon energy, promptly any one can not receive the beacon that the other side sends at the appointed time between them, and the energy grade that then can not receive the beacon that a side of beacon will be immediately will send it automatically increases one-level; Send then; If do not receive still that at the appointed time the other side replys the beacon of returning, then continuing increases the energy grade of one-level beacon again, and then sends; So till can receiving at the appointed time that the other side replys the beacon of returning, stop the increase of beacon power.All do not receive the beacon that the other side replys if increase power grade always; And power grade has been increased to the superlative degree; Represent that then the distance between first machine and second machine has exceeded alarm distance, the human-machine interface module on first machine and second machine begins to report to the police.After this can be configured to get into automatically emission peak power beacon state in order to get into search condition from the anti-state of losing, report to the police first machine that is fixed afterwards or is carried on the target, be beneficial to the operator and hold of the search of second machine target.
If when the automatic increase of a side who does not receive beacon power grade is constantly attempted emission then; An other side is after the beacon that receives the bigger one-level of energy grade, and the energy grade that beacon is sent in automatic increase next time is consistent with the energy grade of the beacon that receives.In alarm range; Because the distance between first machine and second machine zooms out, the beacon energy grade that causes transmitting between first machine and second machine is elevated, and when the distance between first machine and second machine becomes near; In order to reduce energy consumption; Need reduce the energy grade of beacon again, in this specific embodiment, can adopt three kinds of methods to reduce the energy grade of beacon:
A kind of is after energy grade of every transmission is higher than the beacon of minimum energy grade; The energy grade of the next beacon that and then will send reduces one-level; If next beacon can be received and reply by the other side; Then reducing the energy grade of the next beacon that will launch again, so attempt, is minimum one-level up to the energy grade of the beacon of being launched.
Second method is when receiving beacon each time, all reads once the RSSI value of current beacon; If the RSSI value is enough big, surpass the thresholding of setting, then attempt reducing the energy grade that next time is about to the beacon of emission; And then emission sees whether can be received, if could would continue to reduce the energy grade of beacon, up to RSSI value less than the thresholding of presetting; Otherwise the energy grade that keeps current beacon, and the beacon emissions of constantly attempting reduction one-level energy.
The third method comprises step 1; Set an alarm range; In this alarm range during a pair of radio frequency beacon transceiver furthest of this anti-lose anti-theft system; Beacon minimum energy value when this sends beacon to receiving the other side between the radio frequency beacon transceiver each other is defined as the highest energy grade; When nearest, the beacon minimum energy value when this sends beacon to receiving the other side between the radio frequency beacon transceiver each other is defined as the minimum energy grade to radio frequency beacon transceiver for this, between this highest energy grade and minimum energy grade, distributes the beacon of the different-energy grade of a predetermined number; Step 2; Controlling this radio frequency beacon transceiver sends the incompatible replacement of a beacon group and sends single beacon; The beacon combination is made up of two adjacent single beacons of energy grade; Use beacon Sx and beacon S (x+1) expression respectively, the energy grade of beacon S (x+1) is higher than beacon Sx, and judges whether the other side can receive the beacon combination; Step 3 if can not receive Sx, but is received S (x-1), and then this radio frequency beacon transceiver keeps sending this beacon combination; Step 4; If can receive beacon Sx; Then the beacon combination is adjusted to S (x-1) and Sx, repeating step two can not receive the beacon S (x-n) that wherein energy grade is low up to the other side's radio frequency beacon transceiver; But can receive till the high beacon S (x-n+1) of energy grade, and make this radio frequency beacon transceiver keep sending this beacon combination S (x-n) and S (x-n+1); Step 5; If can not receive beacon S (x+1); Then the beacon combination is adjusted to S (x+1) and S (x+2), repeating step two can not receive the beacon S (x+m) that wherein energy grade is low up to the other side's radio frequency beacon transceiver; But can receive till the high beacon S (x+m+1) of energy grade, and make this radio frequency beacon transceiver keep sending this beacon combination S (x+m) and S (x+m+1).
Specifically; Be the method that adopts multibeacon, each beacon that sends is actually an incompatible replacement of beacon group and sends single beacon, and the beacon combination is made up of two adjacent single beacons of energy grade; Two independent beacons in the beacon combination are with beacon Sx and beacon S (x+1) expression; Wherein x representes the numbering of beacon combination, and beacon group is share Sx and S (x+1) expression, and the energy grade of beacon Sx and beacon S (x+1) is adjacent.In system's operation at the beginning, the beacon of transmission is the beacon combination that beacon S0 and beacon S (0+1) (being S1) are formed, numbering 0 expression minimum energy grade.Can receive S0 and S1 in the beacon combination respectively if receive a side at beacon, represent that current energy grade is minimum, energy does not need to turn down again.If beacon receives a side and does not receive the S1 among the beacon combination S0S1; So because the power grade of S1 than the big grade of S0; Certainly S0 does not receive yet, and this moment, the beacon take over party increased the emitting power grade of beacon combination automatically, i.e. beacon combination becoming S1S2; If the other side can receive S2 and still not receive S1 this moment; Represent between first machine and second machine to set up heartbeat contact (promptly alternately sending beacon between first machine and second machine each other), and the setting of the energy grade of beacon combination at present is only that first machine and second machine will be kept this beacon combination heartbeat is got in touch down continuously through beacon.And if the take over party does not still receive S2 after the beacon combination becomes S1S2; Then beacon emissions side does not receive the other side's answer at the appointed time, and just continuing increases grade, i.e. a S2S3 with the energy grade of beacon combination; So continue; Can receive beacon group up to the take over party and only be combined into, beacon combination becoming this moment SnSn+1, what the take over party was received is the Sn+1 beacon in the beacon combination; And the Sn beacon can not be received owing to the little one-level of energy grade, and the heartbeat between such first machine and second machine has just been set up.Distance shortens again between first machine and second machine; Two beacons during the beacon that causes transmitting party to emit makes up can both receive the side of being received that promptly Sm and the S (m+1) among the beacon combination SmS (m+1) is received, when then the take over party replys beacon; The current beacon energy grade of receiving is reduced one-level; Become S (m-1) Sm, still can two beacons in the beacon combination all be received, then continue to reduce the energy grade of beacon combination if receive a side this moment; Can only receive a bigger beacon of energy during beacon makes up and the less beacon of another one energy does not receive up to a side who receives; Represent that beacon energy has reached preferably configuration this moment, keep heartbeat with the energy of this beacon between first machine and second machine, in the beacon combination that wherein a side receives, occur the situation that two beacons all receive or all do not receive again; Above-mentioned energy adjustment process above continuing again realizes that finally the energy of beacon is in optimal level.
Do not receive once in a while in order to prevent the beacon that environmental factor causes, thereby cause between first machine and second machine accidental unnecessary power adjustment that occurs, can increase Rule of judgment, just under the continuous situation that does not receive beacon more than 2 or 3 times, carry out the power adjustment.Simultaneously this also help beacon be not with the minimum energy level emission in, constantly attempt for the energy grade that reduces beacon reducing beacon energy the endless loop that possibly cause.
The adjustment of dynamic beaconing power helps saving electric energy, reduces electromagnetic radiation, and the method that the beacon that adopts alternate manner to realize during this type of is used is dynamically adjusted also belongs to protection scope of the present invention.
Anti-lose anti-theft system based on this less radio-frequency beacon location technology can be used in combination with the very ripe GPS positioning system of present prior art, is used to remedy gps system in location indoor or position, the situation of blocking inferior GPS blind area.When gps signal was normal, equipment when gps signal disappears, was starting point with last GPS position through the GPS location, carries out target monitoring and fixed-position searching through less radio-frequency beacon locator meams.
The anti-lose anti-theft system that this less radio-frequency beacon transceiver is formed is low in energy consumption, and volume is very little, so be well suited for being applied to children, the old man guards on the anti-loss device, perhaps is used for the anti-necklace of losing of pet.Also can be used for the objects such as parcel that other deposit valuables, volume is little, is difficult for finding.
The hunting zone of less radio-frequency beacon location technology according to the invention relies on the maximum wireless power that can emit with less radio-frequency beacon transceiver; Increase radio transmitted power; And corresponding increase beacon pulse number; Promptly increase the area grade of hunting zone, just can correspondingly enlarge the scope that to search for.Less radio-frequency beacon transceiver adopts the free radio frequency band of ISM of 402MHz to 470MHz in the present embodiment; Emissive power is no more than 10 milliwatts; Usable range is from the zone of 200 meters to 500 meters of radiuses; Maximum can cover 1 kilometer range, and concrete hunting zone is looked the actual environment situation and decided, and is fit to most of applied environments.Need add large coverage, can apply for increasing beacon emissions power and increase beacon quantity.
The less radio-frequency beacon frequency scope that the present invention adopts adopts the system of the beacon location technology of other radio bands also should be included within the protection domain of the present invention in 402MHz to 470MHz scope; The less radio-frequency beacon power scope that the present invention adopts is between 10 milliwatt to 0.1 milliwatts and be successively that the mode of successively decreasing distributes, and adopts the system of the beacon location technology of other distribute power also should be included within protection scope of the present invention; The present invention adopts a beacon transceiver to be installed on the target, adopts one or more than one radio frequency beacon transceiver to search for, and adopts the radio frequency beacon transceiver of other scales also should be included within protection scope of the present invention.
Though detailed explanation and introduction have been done in the front; Also there are corresponding detailed synoptic diagram and specific embodiment to do aid illustration; But to one skilled in the art, in the claim scope, obviously various improvement can be arranged, this does not break away from the spirit and scope of the present invention; Therefore, above-mentioned corresponding explanation and respective embodiments and do not mean that limitation of the present invention.
Claims (5)
1. anti-lose anti-theft system; Comprise at least one pair of radio frequency beacon transceiver; Wherein a radio frequency beacon transceiver is fixed or is carried at by on the target of monitor protection, and another radio frequency beacon transceiver is carried on one's body the operator who has a responsibility for protecting target, and this alternately sends the less radio-frequency beacon each other to radio frequency beacon transceiver; When one of them radio frequency beacon transceiver does not receive the radio frequency beacon that another radio frequency beacon transceiver sends; This radio frequency beacon transceiver gives the alarm, and wherein, this radio frequency beacon transceiver comprises a RF receiving and transmission module, a control treatment module, a human-machine interface module and a power supply; RF receiving and transmission module is used for receiving the instruction from control treatment module; Produce or stop to produce the radio frequency beacon, and the radio frequency signal that receives the CF that sends out from another radio frequency beacon transceiver, and transform and be demodulated to original signal and be sent to this control treatment module; Be connected with data-interface through the SPI communication interface between this RF receiving and transmission module and the control treatment module; The SPI communication interface is used for carrying out the configuration operation of control treatment module to RF receiving and transmission module, and data-interface is used for carrying out the data transmission of control treatment module to RF receiving and transmission module, it is characterized in that; The rf pulse sequence that the radio frequency beacon of this RF receiving and transmission module emission successively decreases for the energy that sends according to the certain rule circulation successively; This certain rule is meant one schedule time of interval between adjacent two pulse trains, and each pulse train is made up of the beacon pulse of predetermined number, each one schedule time of beacon pulse persistance.
2. anti-lose anti-theft system as claimed in claim 1; It is characterized in that; This control treatment module also comprises beacon energy intelligence adjustment module, is in an optimum capacity value in order to the energy value of regulating the less radio-frequency beacon that alternately sends each other between the radio frequency beacon transceiver, and wherein this optimum capacity value is meant in the predefined alarm range of operator; During the radio frequency beacon that can receive the other side mutually between the radio frequency beacon transceiver and sent, the minimum energy value of this radio frequency beacon.
3. the method for an anti-lose anti-theft system ferret out as claimed in claim 1, it comprises:
Step 1; One first radio frequency beacon transceiver is fixed in by on the monitored object; This radio frequency beacon transceiver sends a radio frequency beacon according to certain rule circulation, and this radio frequency beacon that sends according to the certain rule circulation is meant the rf pulse sequence that the energy that sends according to the certain rule circulation successively decreases successively, and this certain rule is meant between adjacent two pulse trains a schedule time at interval; Each pulse train is made up of the beacon pulse of predetermined number, each one schedule time of beacon pulse persistance;
Step 2 is carried at one second radio frequency beacon transceiver and has a responsibility for protecting this by on one's body the operator of monitored object, in order to receiving the radio frequency beacon that sends out from this first radio frequency beacon transceiver, and shows radio frequency beacon reception condition;
Step 3, the operator arbitrarily attempts all directions and walks about, and receives the radio frequency beacon that this first radio frequency beacon transceiver sends up to this second radio frequency beacon transceiver;
Step 4, the operator attempts moving toward different direction, judges whether to receive the power of this radio frequency beacon or this radio frequency beacon, roughly to judge the direction of localizing objects;
Step 5, the operator advances along the direction of the localizing objects that this is roughly judged, receives stronger radio frequency beacon signal up to this second radio frequency beacon transceiver;
Step 6, repeating step four and step 5 successively, up to localizing objects in visual range.
4. the method for an anti-lose anti-theft system adjusting beacon energy grade as claimed in claim 1 comprises:
Step 1; Set an alarm range; In this alarm range during a pair of radio frequency beacon transceiver furthest of this anti-lose anti-theft system; Beacon minimum energy value when this sends beacon to receiving the other side between the radio frequency beacon transceiver each other is defined as the highest energy grade; When nearest, the beacon minimum energy value when this sends beacon to receiving the other side between the radio frequency beacon transceiver each other is defined as the minimum energy grade to radio frequency beacon transceiver for this, between this highest energy grade and minimum energy grade, distributes the beacon of the different-energy grade of a predetermined number;
Step 2, arbitrary radio frequency beacon transceiver are sent an energy grade and are higher than after the beacon of minimum energy grade, with the energy grade reduction one-level of next beacon to be sent;
Step 3 judges whether next beacon can be received and reply by the other side, if then reduce the energy grade of the next beacon that will launch again;
Step 4, repeating step three is minimum one-level up to the energy grade of the beacon of being launched.
5. the method for an anti-lose anti-theft system adjusting beacon energy grade as claimed in claim 1 comprises:
Step 1; Set an alarm range; In this alarm range during a pair of radio frequency beacon transceiver furthest of this anti-lose anti-theft system; Beacon minimum energy value when this sends beacon to receiving the other side between the radio frequency beacon transceiver each other is defined as the highest energy grade; When nearest, the beacon minimum energy value when this sends beacon to receiving the other side between the radio frequency beacon transceiver each other is defined as the minimum energy grade to radio frequency beacon transceiver for this, between this highest energy grade and minimum energy grade, distributes the beacon of the different-energy grade of a predetermined number;
Step 2 is set the signal intensity displayed value thresholding of a radio frequency beacon, when arbitrary radio frequency beacon transceiver receives beacon; All read once the signal intensity displayed value of current beacon,, surpass the thresholding of this setting if this signal intensity displayed value is enough big; Then attempt reducing the energy grade that next time is about to the beacon of emission, judge then whether the beacon of this energy grade can be received by the other side, if can be received by the other side; Then continue to reduce the energy grade of beacon, up to the signal intensity displayed value less than this thresholding, if can not be received by the other side; The energy grade that then keeps current beacon, and the beacon emissions of constantly attempting reduction one-level energy.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101927894A CN101673453B (en) | 2009-09-28 | 2009-09-28 | Anti-lose anti-theft system and method thereof for searching target and regulating beacon energy grade |
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| CN2009101927894A CN101673453B (en) | 2009-09-28 | 2009-09-28 | Anti-lose anti-theft system and method thereof for searching target and regulating beacon energy grade |
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| CN101673453B true CN101673453B (en) | 2012-03-14 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103680049A (en) * | 2012-09-03 | 2014-03-26 | 成都槟果科技有限公司 | Loss-resistant device based on GPS (Global Position System) positioning |
| CN103729982B (en) * | 2014-01-08 | 2015-12-09 | 杭州晟元数据安全技术股份有限公司 | A kind of implementation method of Multifunctional lose-preventing device |
| CN104980521B (en) * | 2015-06-30 | 2018-12-25 | 北京奇虎科技有限公司 | It is a kind of for the control method of Intelligent lost-proof type equipment, proxy server and system |
| CN105120422B (en) * | 2015-07-17 | 2018-05-18 | 轻客智能科技（江苏）有限公司 | The method of 2 bluetooth positioning |
| CN105118249A (en) * | 2015-08-03 | 2015-12-02 | 深圳市爱的扣扣科技有限公司 | Searching method of wireless anti-lost device |
| CN109416867B (en) * | 2016-07-04 | 2022-05-03 | 索尼公司 | Robot, robot system, and recording medium |
| CN106912003A (en) * | 2017-02-22 | 2017-06-30 | 上海斐讯数据通信技术有限公司 | A kind of short distance hunting system and object method for searching |
| CN107800698A (en) * | 2017-10-27 | 2018-03-13 | 上海京颐科技股份有限公司 | Baby's recognition methods and device, storage medium, terminal |
| CN108765900B (en) * | 2018-06-28 | 2020-10-02 | 珠海格力电器股份有限公司 | Method and system for preventing intelligent equipment from being lost by using wearable equipment |
| CN110021127A (en) * | 2019-03-25 | 2019-07-16 | 深圳市联智物联网科技有限公司 | A kind of storage theft protection for devices management system |
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