CN105118249A - Searching method of wireless anti-lost device - Google Patents
Searching method of wireless anti-lost device Download PDFInfo
- Publication number
- CN105118249A CN105118249A CN201510482412.8A CN201510482412A CN105118249A CN 105118249 A CN105118249 A CN 105118249A CN 201510482412 A CN201510482412 A CN 201510482412A CN 105118249 A CN105118249 A CN 105118249A
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- loss device
- main frame
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- searching
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/24—Reminder alarms, e.g. anti-loss alarms
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
- G01S11/02—Systems for determining distance or velocity not using reflection or reradiation using radio waves
- G01S11/06—Systems for determining distance or velocity not using reflection or reradiation using radio waves using intensity measurements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
- G01S3/14—Systems for determining direction or deviation from predetermined direction
- G01S3/16—Systems for determining direction or deviation from predetermined direction using amplitude comparison of signals derived sequentially from receiving antennas or antenna systems having differently-oriented directivity characteristics or from an antenna system having periodically-varied orientation of directivity characteristic
- G01S3/20—Systems for determining direction or deviation from predetermined direction using amplitude comparison of signals derived sequentially from receiving antennas or antenna systems having differently-oriented directivity characteristics or from an antenna system having periodically-varied orientation of directivity characteristic derived by sampling signal received by an antenna system having periodically-varied orientation of directivity characteristic
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a searching method of a wireless anti-lost device. A searching process comprises the following steps that in a searching mode, a user puts a host in front of a user body in a flat mode, the host is close to the body and is turned a circle; during a process of turning the circle, the host continuously receives signals from the anti-lost device and detects a signal intensity of each signal so as to form a group of data records; the signal with the minimum intensity in the data records is searched, the signal is data when the user holds a back side of the host to the anti-lost device and an index value of the data in a data record sequence is i; the number of the data records is n and an included angle of an anti-lost device position and a reference direction satisfies the following equation: alpha=(i/n)*360degree+180degree, wherein a right front direction of the user is taken as the reference direction; the host displays an anti-lost device distance estimation value and a direction of the anti-lost device. The host can determine the distance estimation value of the anti-lost device and the host and the direction so that the user can conveniently and rapidly search an object with the anti-lost device.
Description
[technical field]
The present invention relates to wireless anti-loss device, particularly relate to a kind of searching method of wireless anti-loss device.
[background technology]
Utilize the electronic anti-theft apparatus product that 2.4G wireless communication technology realizes, comprise bluetooth 4.0 anti-loss device, now very general.Electronic anti-theft apparatus, built-in wireless transmit/receive units, carries out radio communication with cycle regular hour and anti-lost main frame.Anti-lost main frame is by the break-make of radio communication, and whether judgment object is in electromagnetic field effective coverage; By the intensity of wireless signal, estimation anti-loss device is from the distance of main frame.
The searching method of application number a kind of anti-lost objects based on TOF wireless distance finding that has been the disclosure of the invention of CN201410014958.6, the more than one anti-loss device handset with needing anti-lost objects to bind mutually is set, the wirelessly same anti-loss device machine tool wireless connections of all anti-loss device handsets, and the mobile phone that carries with user of anti-loss device machine tool or tablet terminal are by bluetooth approach wireless connections, wherein the distance calculating anti-loss device handset and anti-loss device machine tool is responsible for by anti-loss device machine tool, and range information conveyed to mobile phone or tablet terminal in order to display and further process information by bluetooth approach, so just can avoid that of the prior art to have communication distance short and bring the range information of estimation to be easy to be subject to around alien influence and cause the defect that lost efficacy.
The similar products of existing anti-loss device and same principle, the distance of main frame and anti-loss device is estimated by signal intensity, but the wireless signal of usual adopted 2.4GHz frequency range, more serious by human body interference ratio, people knows from experience absorption and stops most wireless signal, when causing having human body stop and do not have human body to stop between main frame and anti-loss device, signal intensity difference can reach more than the searching method of the wireless anti-loss device of 30d, and Distance Judgment loses measurement reference.And being aware of distance range, main frame also cannot know the direction residing for anti-loss device.The low-power consumption bluetooth based on TICC2540 of a kind of Chi Da company exploitation is looked for something anti-loss device, having adjustable distance is 0-30 rice, in the scope of diameter 30 meters, iff knowing distance, do not know the roughly direction of anti-loss device, bring very large difficulty can to searching anti-loss device.
[summary of the invention]
The technical problem to be solved in the present invention is to provide a kind of distance value can not only knowing anti-loss device, can also judge the searching method of the wireless anti-loss device in direction, anti-loss device position.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is, a kind of searching method of wireless anti-loss device, and search procedure comprises the following steps:
101, under searching modes, user holds main frame and lies in health front, and main frame is near health, and a circle of turning;
102, in the process of turning a circle, main frame continuous reception, from the signal of anti-loss device, detects the signal intensity of each signal, forms one group of data record;
103, find the signal that in data record, intensity is minimum, this signal is that user holds main frame back to data during anti-loss device, and the index value of these data in data records series is i;
104, the number of data record is n, and anti-loss device position is °+180 °, angle α=(i/n) × 360 of reference direction relative to user dead ahead;
105, the direction of main frame display anti-loss device range estimation value and anti-loss device.
The searching method of above-described wireless anti-loss device, comprises the following steps:
201, user enters searching modes by main frame touch screen interface main control system, and main frame, after receiving the data message that anti-loss device sends, notifies that in return information anti-loss device enters searching modes;
202, after anti-loss device enters searching modes, improve to the frequency of the transmission data of main frame, proceed to quick transmission state, and reply and enter searching modes in transmission packet;
203, main frame receives after anti-loss device entered the message of searching modes, notifies user by the interface display of display screen.
The searching method of above-described wireless anti-loss device, comprises the following steps:
To in step 102 to the smoothing filtering of data record that a circle of turning obtains, after removing the data record of data records series head and afterbody redundancy, carry out step 103 simultaneously.
The searching method of above-described wireless anti-loss device, comprises the following steps:
Obtain the highest signal strength value s in data records series in a circle process of turning, the index value of highest signal strength value s is k; K=(i+n/2) MODn; According to s value, obtain corresponding range estimation value by tabling look-up; Wherein MOD is for asking mould.
The main frame of the searching method of the present invention is wireless anti-loss device can by judging that anti-loss device is from the distance valuation of main frame and direction, and person easy to use finds the object of wearing anti-loss device faster.
[accompanying drawing explanation]
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is the search system block diagram of the wireless anti-loss device of the embodiment of the present invention.
Fig. 2 is embodiment of the present invention full twist measured signal strength test figure.
Fig. 3 is that the embodiment of the present invention holds mobile phone searching anti-loss device schematic diagram.
Embodiment]
The searching method of the embodiment of the present invention is wireless anti-loss device uses the smart mobile phone of band bluetooth 4.0 as wireless host, and anti-loss device has the wireless transmitter of bluetooth 4.0 low power consumption protocol.Smart mobile phone is controlled bluetooth anti-loss device by mobile phone terminal application software.
Generally, between anti-loss device and main frame, carry out radio communication with fixed time interval, send a packet by anti-loss device, reply immediately after main frame receives.Whether main frame and anti-loss device all can by the whether successes of radio communication, judge mutually within coverage.Communication completes instantaneously, and as 1 second once communicated, communication required time is 1ms, and all the other 999ms are the time not having to communicate.When not communicating, anti-loss device and main frame all can enter into park mode.Under park mode, anti-loss device is except the device waken up for next call duration time, and all the other functional modules are all in closed condition.Main frame is except the functional module waken up for the next synchronous communication time, and all the other functions can be in suspended state.
When user needs to find anti-loss device, come by following steps:
Smart mobile phone described in native system, is general popular mobile phone, only needs function of Bluetooth communication, does not need other special hardware unit.Determine direction and lean on be people turn and software calculate.
Operate and control mobile phone by mobile phone interface and enter anti-loss device searching modes, mobile phone, after receiving the data message that anti-loss device sends, controls bluetooth interface device and replys, notify that anti-loss device enters searching modes in return information.
After anti-loss device enters searching modes, adjust short in transmission data cycle of mobile phone, the commitment defini interval as mobile phone and anti-loss device is at ordinary times 1s, becomes 10ms after entering searching modes., become quick transmission state, and reply and enter searching modes in transmission packet.
Mobile phone receives after anti-loss device entered the message of searching modes, notifies user by the interface display of display screen.
User holds mobile phone and lies in health dead ahead, and mobile phone, near health, to be turned clockwise a circle with even speed, then made main frame enter computing mode by touch-screen input command.The consuming time of a circle of turning does not limit, and it is Millisecond that radio communication sends the cycle, and the uneven meeting of speed of turning brings error to result of calculation.Use electronic compass that data can be allowed more accurate, but add the restriction to mobile phone model, a lot of mobile phone does not have electronic compass, and mobile phone preparation electronic compass can as the preferred version of smart mobile phone of the present invention.
In the process of turning a circle, mobile phone continuous reception from the signal of anti-loss device, and detects the signal intensity of each signal, forms one group of data record.
Mobile phone, by the data record in the process of turning, calculates the position of anti-loss device.Comprise the deflection that anti-loss device range estimation value and anti-loss device position and user dead ahead (major axis of smart mobile phone or minor axis) are reference direction, be shown to user by user interface.
Cell phone software calculates the method for anti-loss device position:
To the smoothing filtering of signal strength data sequence A of a circle of turning, get rid of other Outliers, recording filtered data sequence is B.Smothing filtering adopts window average filtering method.
Removal data sequence head and afterbody user are in static part.When user is in static, signal intensity is constant or drift about among a small circle.Do not start the data before significantly changing in data sequence to abandon, after turning, data are stopped and are not had vicissitudinous data also to abandon.The threshold value that judgement " significantly changes " is drawn by the experience of test.The sequence removed after stationary part data is designated as C, and the data amount check comprised in C sequence is designated as n.
Find the minimum value m of data sequence C, m is user and holds cell phone back to data during anti-loss device, and the index value of record m in data sequence is i.
The clockwise angle α in anti-loss device and user dead ahead is °+180 °, (i/n) × 360.
By calculating formula (i+2/n) MODn, (MOD is for asking mould), the index value that user is just obtaining data record to mobile phone during anti-loss device is k, gets the signal strength values s that k is corresponding in sequence C.S is data when not having human body to block, and is the most accurately for estimated distance.By the method for tabling look-up, search corresponding range estimation value by s value.The table looked into draws by testing empirical value.
The above embodiment of the present invention is when anti-loss device leaves user's visual line of sight, and user can obtain the azimuth-range valuation of the object wearing anti-loss device by search.When being convenient to search the indoor article or outdoor children and pet of wearing anti-loss device.
Claims (4)
1. a searching method for wireless anti-loss device, is characterized in that, search procedure comprises the following steps:
101, under searching modes, user holds main frame and lies in health front, and main frame is near health, and a circle of turning;
102, in the process of turning a circle, main frame continuous reception, from the signal of anti-loss device, detects the signal intensity of each signal, forms one group of data record;
103, find the signal that in data record, intensity is minimum, this signal is that user holds main frame back to data during anti-loss device, and the index value of these data in data records series is i;
104, the number of data record is n, and anti-loss device position is °+180 °, angle α=(i/n) × 360 of reference direction relative to user dead ahead;
105, the direction of main frame display anti-loss device range estimation value and anti-loss device.
2. the searching method of wireless anti-loss device according to claim 1, is characterized in that, comprise the following steps:
201, user enters searching modes by main frame touch screen interface main control system, and main frame, after receiving the data message that anti-loss device sends, notifies that in return information anti-loss device enters searching modes;
202, after anti-loss device enters searching modes, improve to the frequency of the transmission data of main frame, proceed to quick transmission state, and reply and enter searching modes in transmission packet;
203, main frame receives after anti-loss device entered the message of searching modes, notifies user by the interface display of display screen.
3. the searching method of wireless anti-loss device according to claim 1, is characterized in that, comprise the following steps:
To in step 102 to the smoothing filtering of data record that a circle of turning obtains, after removing the data record of data records series head and afterbody redundancy, carry out step 103 simultaneously.
4. the searching method of wireless anti-loss device according to claim 1, is characterized in that, comprise the following steps:
Obtain the highest signal strength value s in data records series in a circle process of turning, the index value of highest signal strength value s is k; K=(i+n/2) MODn; According to s value, obtain corresponding range estimation value by tabling look-up; Wherein MOD is for asking mould.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510482412.8A CN105118249A (en) | 2015-08-03 | 2015-08-03 | Searching method of wireless anti-lost device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510482412.8A CN105118249A (en) | 2015-08-03 | 2015-08-03 | Searching method of wireless anti-lost device |
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| CN105118249A true CN105118249A (en) | 2015-12-02 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108387862A (en) * | 2018-01-26 | 2018-08-10 | 珠海慧联科技有限公司 | A kind of orientation method based on bluetooth equipment |
| CN108387863A (en) * | 2018-01-26 | 2018-08-10 | 珠海慧联科技有限公司 | A kind of collaboration orientation method and device based on bluetooth equipment |
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| WO2014157295A1 (en) * | 2013-03-27 | 2014-10-02 | 株式会社メガチップス | Lost child search system, recording medium, and lost child search method |
| CN104459675A (en) * | 2014-12-03 | 2015-03-25 | 吕云亭 | Ranging-based object positioning and tracking method and positioning equipment using method |
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2015
- 2015-08-03 CN CN201510482412.8A patent/CN105118249A/en active Pending
Patent Citations (5)
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| CN1808169A (en) * | 2005-01-19 | 2006-07-26 | 北京创先泰克科技有限公司 | System for automatically measuring opposite direction between two objects and implementing method therefor |
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| CN101673453A (en) * | 2009-09-28 | 2010-03-17 | 广州中沙桥汽车用品有限公司 | Anti-lose anti-theft system and method thereof for searching target and regulating beacon energy grade |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN108387862A (en) * | 2018-01-26 | 2018-08-10 | 珠海慧联科技有限公司 | A kind of orientation method based on bluetooth equipment |
| CN108387863A (en) * | 2018-01-26 | 2018-08-10 | 珠海慧联科技有限公司 | A kind of collaboration orientation method and device based on bluetooth equipment |
| CN108387863B (en) * | 2018-01-26 | 2021-08-06 | 珠海慧联科技有限公司 | Bluetooth device-based cooperative orientation method and device |
| CN108387862B (en) * | 2018-01-26 | 2021-08-06 | 珠海慧联科技有限公司 | Orientation method based on Bluetooth equipment |
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Application publication date: 20151202 |
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