CN103969625A - Wireless positioning method - Google Patents
Wireless positioning method Download PDFInfo
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- CN103969625A CN103969625A CN201410225627.7A CN201410225627A CN103969625A CN 103969625 A CN103969625 A CN 103969625A CN 201410225627 A CN201410225627 A CN 201410225627A CN 103969625 A CN103969625 A CN 103969625A
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- point
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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
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/18—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using ultrasonic, sonic, or infrasonic waves
- G01S5/28—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using ultrasonic, sonic, or infrasonic waves by co-ordinating position lines of different shape, e.g. hyperbolic, circular, elliptical or radial
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
Abstract
The invention provides a wireless positioning method and belongs to the field of wireless positioning. An entity involved in the method comprises a to-be-measured point and at least three fixing points, and the method comprises the following steps: setting all the fixing points on one plane, measuring the distance between the to-be-measured point and each fixing point by using different IP control instructions under a wireless fidelity (WIFI) network respectively, and determining the position of the to-be-measured point through the distances. The method is narrow in application range and is required to be barrier-free, the precision is improved, the cost is reduced, and a good supplement is provided for application of a wireless positioning technology.
Description
Technical field
The invention belongs to wireless positioning field, be specifically related to a kind of wireless location method.
Background technology
Society, wireless location technology has multiple, because have nothing in common with each other in the place of the regional extent of wireless location and use, therefore the difference of the mode of wireless location is also very large.Such as realizing the wireless location that wide scope and precision are not high, can choice for use satnav.Such as GPS of America location, Russia's " GLONASS " location, and the Big Dipper of China location.Realize a zone location (2-10 square kilometre) in a big way, precision even can be used difference satnav to add the technology of inertial positioning in the location in 2 centimetres at decimeter grade.For the indoor environment and the not high location of precision prescribed that have obstruct, can adopt WLAN to add the location technology of RFID.
Summary of the invention
The object of the invention is to solve the difficult problem existing in above-mentioned prior art, a kind of wireless location method is provided.
The present invention is achieved by the following technical solutions:
A kind of wireless location method, the entity that described method relates to comprises tested point and at least three point of fixity, by all point of fixity settings in one plane, use respectively IP steering orders different under WIFI network, measure the distance of tested point and each point of fixity, then determine the position of tested point by these distances.
The described distance of measuring tested point and each point of fixity is achieved in that
The first step: tested point uses WIFI network to send IP steering order to point of fixity, and the time T IME1 of recording instruction transmission.
Second step: point of fixity, after the IP instruction receiving from WIFI, sends ultrasound wave to tested point.
The 3rd step: tested point receives ultrasonic signal, and record receives hyperacoustic time T IME2.
The 4th step: tested point calculates the distance of tested point and this point of fixity, and the aerial transmission speed of ultrasound wave is: V
air=340 meter per seconds.Therefore distance is between the two: S=V
air* (TIME2-TIME1);
Each point of fixity is repeated to four steps above, obtain the distance of tested point and each point of fixity.
Communication between measurement point and each point of fixity is to adopt different transmission frequencies and receive frequency.
The described position by the definite tested point of these distances is achieved in that
Taking each point of fixity as the centre of sphere, the distance taking measurement point to this point of fixity is drawn ball as radius, tries to achieve the position of tested point by the intersection point of each spheroid respectively.
For the situation of three point of fixity, three spheroids intersect at 2 points, and the tested point calculating is positioned under the plane at point of fixity place, are obtaining after the coordinate figure of two intersection points, the intersection point being positioned on the plane of point of fixity place is given up, and the coordinate figure of remaining intersection point is the position of tested point.
The single-chip microcomputer of described method on described tested point is provided with memory function and computing function, and the position of trying to achieve tested point is to complete by the single-chip microcomputer on tested point.
The position of trying to achieve tested point in described method completes by data center, and tested point, by being sent to data center with the range data of point of fixity, completes calculating by data center.
Then each data that gather are calculated the coordinate information of tested point are deposited in database server by described apps server.
Compared with prior art, the invention has the beneficial effects as follows: the present invention adopts hyperacoustic wireless location technology, its scope of application is that region reaches 3 millimeters in the scope of 20*20 rice and its precision.Compare with existing location technology, the applicable regional extent of the inventive method less and require without hindrance every, improved precision, reduced cost, supplement for the application of wireless location technology provides well.
Brief description of the drawings
Fig. 1 is positioning principle figure.
Fig. 2 is the step block diagram of the inventive method.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail:
As shown in Figure 1, ultrasound wave positioning principle and GPS positioning principle are similar for principle of the present invention.The point of fixity that at least three known location are set in the region positioning at needs is respectively O, E, F.In Fig. 1, D point is for needing the point of determined position.If be positioned at object to be positioned that D orders and can obtain the distance of line segment DE, DF, DO, according to three-point fix principle, can accurately obtain the position that D is ordered.Measure the distance of DE, DO, DF herein by the mechanism of different frequency ultrasonic transmission/reception.
Known most ultrasound waves are orientated reflective locator meams as and are measured the distance between emissive source and object, as radar for backing car, indoor by wall location etc.What adopt herein is the mechanism in multi-emitting source, does not adopt reflection mode.Now describe as an example of range determination between DE point example.
The first step: D point uses WIFI network to send IP steering order to E point, and the time T IME1 of recording instruction transmission.
Second: E point, after the IP instruction receiving from WIFI, sends ultrasound wave to D point.
The 3rd: D point receives ultrasonic signal, and record receives hyperacoustic time T IME2.
The 4th step: D point calculates the distance of DE, and the aerial transmission speed of ultrasound wave is: V
air=340 meter per seconds.Therefore the distance between DE is: S
dE=V
air* (TIME2-TIME1).
Can use respectively IP instructions different under WIFI network to measure S according to the way of above four steps
dO=DO, S
dFthe distance of=DF.All frequencies that transmit and receive all can not be identical, in order to avoid confusion reigned.
Respectively taking O, E, F as the centre of sphere, S
dO, S
dE, S
dFfor radius is drawn ball.Three spheroids intersect at 2 points, the point of fixity positioning is arranged on a plane, the measuring point D to be checked calculating is positioned under point of fixity, after utilizing formula to calculate, obtain two coordinate figures, the Z coordinate of one of them coordinate is greater than point of fixity coordinate, this group coordinate information is given up, remaining point is the D point being positioned.
In theory by three point of fixity just can process decision chart 1 in the D position of ordering, but in order to improve the precision of location, the point of fixity often arranging exceedes three, point of fixity is more in principle, the precision of measurement is higher.Through experiment, 4 point of fixity are set and position, precision can reach 3 millimeter.Can meet the needs of general location.
The equipment that D is ordered adopts single-chip microcomputer and ultrasound wave transmitter module and ultrasound wave receiver module to form.
Being calculated as follows of three-point fix:
As shown in Figure 1, the known coordinate that setting O is ordered is O (x1, y1, z1), and the coordinate that E is ordered is E (x2, y2, z2), and the coordinate that F is ordered is F (x3, y3, z3).The coordinate of unknown point D is D (x, y, z).If the distance that O point is ordered to D is S1, the distance that E point is ordered to D is S2, and the distance that F point is ordered to D is S3.Three known points and a unknown point establish an equation under meeting.
(x-x1)
2+(y-y1)
2+(z-z1)
2＝S1
2(1)
(x-x2)
2+(y-y2)
2+(z-z2)
2＝S2
2(2)
(x-x3)
2+(y-y3)
2+(z-z3)
2＝S3
2(3)
Solving equation group (1) (2) (3).Can calculate the coordinate figure of unknown point D.Thereby realize location.The point of fixity positioning is arranged on a plane, and the measuring point D to be checked calculating is positioned under point of fixity, obtains two coordinate figures after utilizing formula to calculate, and the Z coordinate of one of them coordinate is greater than point of fixity coordinate, this group coordinate information is given up.
For rectification error, make for the calculating of D point position more accurate.Can add the mechanism of multiple known fixed points.The coordinate of setting the 4th known fixed point G is G (x4, y4, z4), and the distance that G point is ordered to D is S4.Meet following equation:
(x-x4)
2+(y-y4)
2+(z-z4)
2＝S4
2(4)
Form respectively system of equations (1) (2) (3), (1) (2) (4), (1) (3) (4), (2) (3) (4).Above-mentioned system of equations is solved to the coordinate figure that obtains four groups of D and order (x ', y ', z '), and (x ", y ", z "), (x ' ", y ' ", z ' "), (x " ", y " ", z " ").The actual coordinate of D is by asking arithmetic mean to obtain to above-mentioned four groups of coordinate figures.As formula (6), (7), (8).
Because ultrasonic sensor is difficult to accomplish distinguished launching site is not provided by frequency, so the present invention has introduced WIFI mechanism.Use the largest benefit of wireless WIFI to be, the equipment on anchor point D can be accomplished the simplest.The position calculation of ordering for D also can be completed by host computer.Because WIFI adopts the transmission of 802.1g radio magnetic wave, its velocity of propagation is the light velocity, relatively hyperacoustic transfer rate, and it is consuming time negligible.Its positioning flow as shown in Figure 2.
For the calculating of D point position, be divided into two kinds of modes according to actual needs, the first is to calculate D point coordinate (this mode does not need data center) by D point device.The second is to be sent to host computer with the range data of point of fixity.Calculated by host computer.First kind of way needs the Single Chip Microcomputer (SCM) system on D point to have storage and computing function, if need graphical demonstration also will load cartographic information.If can not load at D point in actual use the computer system of high handling property, can the choice for use second way.
The location information data of storing Back ground Information and timing acquiring in database, basic data comprises cartographic information; The information such as coordinate information, IP address of the point of fixity having arranged.The positional information of timing acquiring comprises the IP address of unknown point, time, the coordinate information etc. of each location.Then each data that gather are calculated and are deposited the coordinate information of tested point in database by apps server.In apps server, can set up B/S program, user can pass through positional information and the movement track of browser Real-Time Monitoring tested point in terminal.
Tested point and data center adopt TCP/IP mode communicate, for guaranteeing sending to of locator data, employing be that connection-oriented Transmission Control Protocol transmits, the apps server of data center is that service end is opened monitoring service, tested point is client.
Hyperacoustic transmission range is relevant with the power of ultrasonic generator, because hyperacoustic transmission range is limited, this system is not suitable for the location of wide scope.If the scope of activities of tested point can adopt more greatly the method for setting up point of fixity to expand usable floor area more.Just can realize location as long as the scope that arranges of point of fixity is no more than the coverage of WIFI network in theory, but in actual applications, increasing of point of fixity quantity also can increase the burden that point of fixity network performance detects and position data is calculated.
Technique scheme is one embodiment of the present invention, for those skilled in the art, the invention discloses on the basis of application process and principle, be easy to make various types of improvement or distortion, and be not limited only to the described method of the above-mentioned embodiment of the present invention, therefore previously described mode is just preferred, and does not have restrictive meaning.
Claims (8)
1. a wireless location method, it is characterized in that: the entity that described method relates to comprises tested point and at least three point of fixity, by all point of fixity settings in one plane, use respectively IP steering orders different under WIFI network, measure the distance of tested point and each point of fixity, then determine the position of tested point by these distances.
2. method according to claim 1, is characterized in that: described in measure tested point and each point of fixity distance be achieved in that
The first step: tested point uses WIFI network to send IP steering order to point of fixity, and the time T IME1 of recording instruction transmission.
Second step: point of fixity, after the IP instruction receiving from WIFI, sends ultrasound wave to tested point.
The 3rd step: tested point receives ultrasonic signal, and record receives hyperacoustic time T IME2.
The 4th step: tested point calculates the distance of tested point and this point of fixity, and the aerial transmission speed of ultrasound wave is: V
air=340 meter per seconds.Therefore distance is between the two: S=V
air* (TIME2-TIME1);
Each point of fixity is repeated to four steps above, obtain the distance of tested point and each point of fixity.
3. method according to claim 2, is characterized in that: the communication between measurement point and each point of fixity is to adopt different transmission frequencies and receive frequency.
4. method according to claim 2, is characterized in that: the described position by the definite tested point of these distances is achieved in that
Taking each point of fixity as the centre of sphere, the distance taking measurement point to this point of fixity is drawn ball as radius, tries to achieve the position of tested point by the intersection point of each spheroid respectively.
5. method according to claim 4, it is characterized in that: for the situation of three point of fixity, three spheroids intersect at 2 points, the tested point calculating is positioned under the plane at point of fixity place, obtaining after the coordinate figure of two intersection points, the intersection point being positioned on the plane of point of fixity place is given up, and the coordinate figure of remaining intersection point is the position of tested point.
6. method according to claim 5, is characterized in that: the single-chip microcomputer of described method on described tested point is provided with memory function and computing function, and the position of trying to achieve tested point is to complete by the single-chip microcomputer on tested point.
7. method according to claim 5, is characterized in that: the position of trying to achieve tested point in described method completes by data center, and tested point, by being sent to data center with the range data of point of fixity, completes calculating by data center.
8. method according to claim 7, is characterized in that: then each data that gather are calculated the coordinate information of tested point is deposited in database server by described apps server.
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|---|---|---|---|
| CN201410225627.7A CN103969625A (en) | 2014-05-21 | 2014-05-21 | Wireless positioning method |
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|---|---|---|---|
| CN201410225627.7A CN103969625A (en) | 2014-05-21 | 2014-05-21 | Wireless positioning method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105203996A (en) * | 2015-09-16 | 2015-12-30 | 上海智臻智能网络科技股份有限公司 | Mobile device and indoor positioning method, system and device as well as anchor nodes thereof |
| CN106249263A (en) * | 2016-07-06 | 2016-12-21 | 北京南科大蓝色科技有限公司 | A kind of high-precision point positioning method based on electronic chart |
| CN106291463A (en) * | 2016-07-27 | 2017-01-04 | 南京崇山通信科技有限公司 | A kind of indoor orientation method combined based on WiFi and sound wave |
| CN106570925A (en) * | 2016-10-25 | 2017-04-19 | 北京强度环境研究所 | General 3D model rendering method |
| CN107290723A (en) * | 2017-06-22 | 2017-10-24 | 北京地平线信息技术有限公司 | Sound localization method, device and electronic equipment |
| CN107846721A (en) * | 2017-10-23 | 2018-03-27 | 林楚莲 | A kind of alignment system and its method based on Wi Fi direct-connecting technologies |
| CN108139460A (en) * | 2015-12-07 | 2018-06-08 | 谷歌有限责任公司 | Coordinate alignment system using the cloud of ultrasonic pulse and radio signal |
| CN109462851A (en) * | 2018-12-28 | 2019-03-12 | 北京奇安信科技有限公司 | Fishing hot spot detecting method, device, electronic equipment and storage medium |
-
2014
- 2014-05-21 CN CN201410225627.7A patent/CN103969625A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105203996A (en) * | 2015-09-16 | 2015-12-30 | 上海智臻智能网络科技股份有限公司 | Mobile device and indoor positioning method, system and device as well as anchor nodes thereof |
| CN108139460A (en) * | 2015-12-07 | 2018-06-08 | 谷歌有限责任公司 | Coordinate alignment system using the cloud of ultrasonic pulse and radio signal |
| CN106249263A (en) * | 2016-07-06 | 2016-12-21 | 北京南科大蓝色科技有限公司 | A kind of high-precision point positioning method based on electronic chart |
| CN106291463A (en) * | 2016-07-27 | 2017-01-04 | 南京崇山通信科技有限公司 | A kind of indoor orientation method combined based on WiFi and sound wave |
| CN106291463B (en) * | 2016-07-27 | 2018-10-23 | 南京崇山通信科技有限公司 | A kind of indoor orientation method combined based on WiFi and sound wave |
| CN106570925A (en) * | 2016-10-25 | 2017-04-19 | 北京强度环境研究所 | General 3D model rendering method |
| CN107290723A (en) * | 2017-06-22 | 2017-10-24 | 北京地平线信息技术有限公司 | Sound localization method, device and electronic equipment |
| CN107290723B (en) * | 2017-06-22 | 2019-11-05 | 北京地平线信息技术有限公司 | Sound localization method, device and electronic equipment |
| CN107846721A (en) * | 2017-10-23 | 2018-03-27 | 林楚莲 | A kind of alignment system and its method based on Wi Fi direct-connecting technologies |
| CN109462851A (en) * | 2018-12-28 | 2019-03-12 | 北京奇安信科技有限公司 | Fishing hot spot detecting method, device, electronic equipment and storage medium |
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Application publication date: 20140806 |
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| WD01 | Invention patent application deemed withdrawn after publication |