CN105548961A - Positioning method, shopping cart, server, and shopping cart positioning system - Google Patents
Positioning method, shopping cart, server, and shopping cart positioning system Download PDFInfo
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- CN105548961A CN105548961A CN201610044038.8A CN201610044038A CN105548961A CN 105548961 A CN105548961 A CN 105548961A CN 201610044038 A CN201610044038 A CN 201610044038A CN 105548961 A CN105548961 A CN 105548961A
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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
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
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Abstract
The invention relates to a positioning method, a shopping cart, a server, and a shopping cart positioning system. The positioning method comprises the steps: determining the transmission time duration of transmitting a wireless signal to each base station; calculating the product of the transmission speed of the wireless signal with the transmission time duration, and obtaining the distances with the base stations; and enabling the distances to be transmitted to the server, so as to enable the server to calculate the position information of the shopping cart according to the distances and the position information of each base station. According to the scheme of the invention, the method can quickly achieve the positioning of the shopping cart so that a worker carries out the arrangement and recovery of the shopping cart. Moreover, the positioning method also can guarantee that the shopping cart cannot be lost.
Description
Technical field
The present invention relates to communication technical field, in particular, relate to localization method, shopping cart, server and shopping cart positioning system.
Background technology
At present, in supermarket, usually can be provided with shopping cart, shopping cart can be utilized to load the article bought to make user.
After user uses shopping cart, shopping cart may be placed on the optional position in supermarket by user conveniently, arranges so be not easy to very much staff and reclaim shopping cart; And when staff's supervision is not tight, shopping cart may be released supermarket by user, thus causes the loss of shopping cart.
Therefore, how to be convenient to staff and shopping cart to be arranged and reclaims, and avoid shopping cart to lose, become the technical matters needing solution at present badly.
Summary of the invention
The invention provides a kind of localization method, shopping cart, server and shopping cart positioning system, to position shopping cart fast.
According to the first aspect of the embodiment of the present invention, a kind of localization method is provided, comprises:
Determine the transmission duration sending wireless signal to each base station;
Calculate transmission speed and the long-pending distance obtained between described each base station of described transmission duration of described wireless signal;
Distance between described each base station is sent to server, with the positional information making the positional information calculation of described server each base station according to the Distance geometry between described and described each base station go out described shopping cart.
Optionally, describedly determine that the step of the transmission duration sending wireless signal to each base station comprises:
When sending wireless signal to each base station, the time sending wireless signal to described each base station is defined as the very first time;
When receiving the wireless signal that described each base station sends, obtain the second time existed in the wireless signal of described each base station transmission, described second time is the time that described each base station receives wireless signal;
The difference calculating described second time and the described very first time obtains transmitting duration.
Optionally, describedly determine that the step of the transmission duration sending wireless signal to each base station comprises:
When sending wireless signal to each base station, the time sending wireless signal to described each base station was defined as the 3rd time;
When receiving the wireless signal that described each base station sends, the time receiving the wireless signal that described each base station sends was defined as the 4th time;
Obtain the 5th time and the 6th time that exist in the wireless signal of described each base station transmission, described 5th time is the time that described each base station receives wireless signal, and described 6th time is the time that described each base station sends wireless signal;
According to described 3rd time, described 4th time, described 5th time and described 6th time, calculate the transmission duration sending wireless signal to each base station.
Optionally, described distance between described each base station is sent to server after, also comprise:
When receiving the alarm command that described server sends, export alarm.
According to the second aspect of the embodiment of the present invention, a kind of localization method is provided, comprises:
Receive that shopping cart sends and between each base station distance;
Obtain the positional information of described each base station;
According to the positional information of described each base station and and described each base station between distance, calculate the positional information of described shopping cart.
Optionally, the described positional information according to described each base station and and described each base station between distance, after calculating the positional information of described shopping cart, also comprise:
Judge that the positional information of described shopping cart is whether in predeterminable area;
When the positional information of described shopping cart is not in predeterminable area, export warning information, and send alarm command to described shopping cart.
According to the third aspect of the embodiment of the present invention, a kind of shopping cart is provided, comprises:
Determination module, for determining the transmission duration sending wireless signal to each base station;
Computing module, the long-pending distance obtained between described each base station of transmission speed and described transmission duration for calculating described wireless signal;
Sending module, for the distance between described each base station is sent to server, with the positional information making the positional information calculation of described server each base station according to the Distance geometry between described and described each base station go out described shopping cart.
Optionally, described determination module comprises:
First determines submodule, for when sending wireless signal to each base station, the time sending wireless signal to described each base station is defined as the very first time;
First obtains submodule, and for when receiving the wireless signal that described each base station sends, obtain the second time existed in the wireless signal of described each base station transmission, described second time is the time that described each base station receives wireless signal;
First calculating sub module, the difference for calculating described second time and the described very first time obtains transmitting duration.
Optionally, described determination module comprises:
Second determines submodule, for when sending wireless signal to each base station, the time sending wireless signal to described each base station is defined as the 3rd time;
3rd determines submodule, for when receiving the wireless signal that described each base station sends, the time receiving the wireless signal that described each base station sends is defined as the 4th time;
Second obtains submodule, for obtaining the 5th time and the 6th time that exist in the wireless signal of described each base station transmission, described 5th time is the time that described each base station receives wireless signal, and described 6th time is the time that described each base station sends wireless signal;
Second calculating sub module, for according to described 3rd time, described 4th time, described 5th time and described 6th time, calculates the transmission duration sending wireless signal to each base station.
Optionally, also comprise:
Alarm modules, for when receiving the alarm command that described server sends, exports alarm.
According to the fourth aspect of the embodiment of the present invention, a kind of server is provided, comprises:
Receiver module, for receiving that shopping cart sends and between each base station distance;
Acquisition module, for obtaining the positional information of described each base station;
Computing module, for according to the positional information of described each base station and and described each base station between distance, calculate the positional information of described shopping cart.
Optionally, also comprise:
Judge module, for judging that the positional information of described shopping cart is whether in predeterminable area;
Output module, during for the positional information at described shopping cart not in predeterminable area, exports warning information, and sends alarm command to described shopping cart.
According to the 5th aspect of the embodiment of the present invention, provide a kind of shopping cart positioning system, comprise shopping cart, server and at least two base stations;
Described shopping cart, for determining the transmission duration sending wireless signal to described each base station, calculate transmission speed and the long-pending distance obtained between described each base station of described transmission duration of described wireless signal, the distance between described each base station is sent to server;
Described server, for receiving that shopping cart sends and between each base station distance, obtain the positional information of described each base station, according to the positional information of described each base station and and described each base station between distance, calculate the positional information of described shopping cart.
Compared with prior art, the technical scheme that the present embodiment provides has the following advantages and feature:
In scheme provided by the invention, shopping cart can determine the transmission duration sending wireless signal to each base station, and goes out the distance between each base station according to the transmission speed of wireless signal and transmission duration calculation.Server after receiving that shopping cart sends and distance between each base station, just can according to the positional information of each base station and and each base station between distance, calculate the positional information of shopping cart.Therefore, scheme provided by the invention can position shopping cart fast, thus is convenient to staff and arranges shopping cart and reclaim, and can also ensure that shopping cart can not be lost.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The process flow diagram of a kind of localization method that Fig. 1 provides for the embodiment of the present invention.
The process flow diagram of the another kind of localization method that Fig. 2 provides for the embodiment of the present invention.
Fig. 3 is the module diagram of a kind of shopping cart according to an exemplary embodiment.
Fig. 4 is the module diagram of a kind of server according to an exemplary embodiment.
Fig. 5 is the module diagram of a kind of shopping cart positioning system according to an exemplary embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, carry out clear, complete description to the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The process flow diagram of a kind of localization method that Fig. 1 provides for the embodiment of the present invention.Localization method shown in Fig. 1, may be used in the equipment such as shopping cart.Localization method provided by the invention can position shopping cart fast, thus is convenient to staff and arranges shopping cart and reclaim, and can also ensure that shopping cart can not be lost.The method comprises the following steps.
Step S11, determine the transmission duration sending wireless signal to each base station.
Wherein, method provided by the invention can be applied to shopping cart, and shopping cart provided by the invention, except common components, can also comprise the parts such as wireless module, controller and battery.Server provided by the invention can be the equipment such as desktop computer or notebook computer.Base station provided by the invention also can comprise the parts such as wireless module, controller and battery, and in the present invention, the quantity of base station is at least two.
Shopping cart can be real-time send wireless signal to each base station, and determine the transmission duration sending wireless signal to each base station.Shopping cart determines that the mode sending the transmission duration of wireless signal to each base station has multiple, briefly introduces two kinds of modes below.
Under first kind of way is applied to the clock of shopping cart and the identical scene of clock of each base station, determine that the step sending the transmission duration of wireless signal to each base station can comprise following sub-step: when sending wireless signal to each base station, the time sending wireless signal to each base station is defined as the very first time; When receiving the wireless signal that each base station sends, obtain the second time existed in the wireless signal of each base station transmission, the second time was the time that each base station receives wireless signal; The difference calculating the second time and the very first time obtains transmitting duration.
In first kind of way, shopping cart needs to send wireless signal to base station, and the time sending wireless signal to base station is defined as the very first time.Receive the wireless signal of shopping cart transmission in base station after, base station all needs to record the time receiving the wireless signal that shopping cart sends, and this time was defined as the second time, and the second time can be sent to shopping cart by wireless signal by base station.When shopping cart receives the wireless signal of base station transmission, shopping cart can obtain the second time existed in the wireless signal of base station transmission, and calculates the difference of the second time and the very first time, thus obtains the transmission duration of shopping cart transmission wireless signal to base station.
Under the second way is applied to the clock of the shopping cart scene not identical with the clock of each base station, determine that the step sending the transmission duration of wireless signal to each base station can comprise following sub-step: when sending wireless signal to each base station, the time sending wireless signal to each base station was defined as the 3rd time; When receiving the wireless signal that each base station sends, the time receiving the wireless signal that each base station sends was defined as the 4th time; Obtain the 5th time and the 6th time that exist in the wireless signal of each base station transmission, the 5th time was the time that each base station receives wireless signal, and the 6th time was the time that each base station sends wireless signal; According to the 3rd time, the 4th time, the 5th time and the 6th time, calculate the transmission duration sending wireless signal to each base station.
In the second way, shopping cart needs to send wireless signal to base station, and the time sending wireless signal to base station was defined as the 3rd time.Receive the wireless signal of shopping cart transmission in base station after, base station all needs to record the time receiving the wireless signal that shopping cart sends, and this time was defined as the 5th time; The time sending wireless signal to shopping cart was defined as the 6th time by base station, and sent the wireless signal with the 5th time and the 6th time to shopping cart.When shopping cart receives the wireless signal of base station transmission, the time that base station can be sent wireless signal by shopping cart was defined as the 4th time, and obtained the 5th time and the 6th time that exist in the wireless signal of base station transmission.Finally, shopping cart according to the 3rd time, the 4th time, the 5th time and the 6th time, can calculate the transmission duration sending wireless signal to each base station.
Such as, suppose that the clock of shopping cart is different from the clock of base station.First, shopping cart needs to send wireless signal to base station, and the time sending wireless signal to base station is defined as t1.Receive the wireless signal of shopping cart transmission in base station after, base station all needs to record the time receiving the wireless signal that shopping cart sends, and this time is defined as t2; The time sending wireless signal to shopping cart is defined as t3 by base station, and sends the wireless signal with t2 and t3 to shopping cart.When shopping cart receives the wireless signal of base station transmission, the time that base station can be sent wireless signal by shopping cart is defined as t4, and obtains t2 and t3 existed in the wireless signal of base station transmission.Finally, shopping cart gets t1, t2, t3 and t4, because the clock of shopping cart is different with the clock of base station, and the time difference of shopping cart and base station is unknown, shopping cart sends transmission duration from wireless signal to base station is also unknown, so need the time difference supposing shopping cart and base station to be td, shopping cart sends transmission duration from wireless signal to base station is tt, then, following linear equation in two unknowns group is listed: (t2-td)-t1=tt, t4-(t3-td)=tt.Because t1, t2, t3 and t4 are known, tt and td is unknown, so can solve tt and td, thus the transmission duration that shopping cart can obtain sending to base station wireless signal is tt.
The long-pending distance obtained between each base station of step S12, the transmission speed calculating wireless signal and transmission duration.
Wherein, after shopping cart determines to send the transmission duration of wireless signal to each base station, transmission speed due to wireless signal is known, so the transmission speed that shopping cart can calculate wireless signal is long-pending with transmission duration, thus obtains the distance between shopping cart and each base station.
Such as, suppose existence 3 base stations, be respectively base station A, base station B and base station C, shopping cart has determined that the transmission duration to base station A transmission wireless signal is t1, the transmission duration sending wireless signal to base station B is t2, the transmission duration sending wireless signal to base station C is t3, transmission speed due to wireless signal is known v, so shopping cart can calculate transmission speed v and the long-pending distance d1 obtained between the A of base station of transmission duration t1 of wireless signal, and calculate transmission speed v and the long-pending distance d2 obtained between the B of base station of transmission duration t2 of wireless signal, and calculate transmission speed v and the long-pending distance d3 obtained between the C of base station of transmission duration t3 of wireless signal.
Step S13, the distance between each base station is sent to server, go out the positional information of shopping cart to make server according to the positional information calculation of each base station of the Distance geometry between each base station.
Wherein, owing to being previously stored with the positional information of each base station in server, so shopping cart needs the distance between each base station to be sent to server, so that server goes out the positional information of shopping cart according to the positional information calculation of each base station of the Distance geometry between each base station.
In addition, calculate the positional information of shopping cart at server after, server just can judge shopping cart whether in safety zone, and when server judges that shopping cart is not in safety zone, server can send alarm command to shopping cart.When shopping cart receives the alarm command of server transmission, shopping cart just can utilize alarm device to export alarm.
In the embodiment shown in fig. 1, shopping cart can determine the transmission duration sending wireless signal to each base station, and goes out the distance between each base station according to the transmission speed of wireless signal and transmission duration calculation.Server after receiving that shopping cart sends and distance between each base station, just can according to the positional information of each base station and and each base station between distance, calculate the positional information of shopping cart.Therefore, scheme provided by the invention can position shopping cart fast, thus is convenient to staff and arranges shopping cart and reclaim, and can also ensure that shopping cart can not be lost.
Fig. 2 is the process flow diagram of another localization method according to an exemplary embodiment, and as shown in Figure 2, the localization method shown in Fig. 2, may be used in server.Fig. 2 is the embodiment cooperatively interacted with Fig. 1, in the embodiment shown in Figure 2, introduces and explain in the embodiment that the part identical with the embodiment shown in Fig. 1 can be shown in Figure 1.Method shown in Fig. 2 comprises the following steps.
In the step s 21, that shopping cart sends and between each base station distance is received.
Wherein, after the distance that shopping cart calculates between shopping cart and each base station, the distance between each base station just can be sent to server by shopping cart, and server just can receive that shopping cart sends and between each base station distance.
Such as, suppose existence 3 base stations, be respectively base station A, base station B and base station C, the shopping cart distance calculated between shopping cart and base station A is d1, distance between shopping cart and base station B is d2, distance between shopping cart and base station C is d3, and the distance d1 between each base station, d2 and d3 just can be sent to server by shopping cart.Server just can receive that shopping cart sends and between each base station distance d1, d2 and d3.
In step S22, obtain the positional information of each base station.
Wherein, the positional information of base station can be coordinate information.If each base station and shopping cart are all in one plane, so coordinate information can be represented by X-axis and Y-axis, and such as, coordinate information can utilize (x, y) to represent; If each base station and shopping cart may not in one plane, so coordinate information can be represented by X-axis, Y-axis and Z axis, and such as, coordinate information can utilize (x, y, z) to represent.
Because the position of each base station pre-sets, so the positional information of each base station is also known, the positional information of each base station can be input in server by staff in advance, so that server can get.
For each base station and shopping cart are in same plane, the coordinate axis with X-axis and Y-axis can be utilized to represent the positional information of each base station.
Such as, super incity shopping cart can only use at the Stall in market, so each base station can be arranged on shopping cart in same plane, so the coordinate axis with X-axis and Y-axis can be utilized to represent the positional information of each base station.Suppose to there are 3 base stations in supermarket, be respectively base station A, base station B and base station C, so in advance base station A can be placed on (0 of coordinate axis, 0) on point, base station B is placed on (100 of coordinate axis, 0), on point, base station C is placed on (0,100) point of coordinate axis.The coordinate information that so server just can get these three base stations is respectively (0,0), (100,0) and (0,100).
For each base station and shopping cart are not in same plane, the coordinate axis with X-axis, Y-axis and Z axis can be utilized to represent the positional information of each base station.
Such as, super incity shopping cart can use at the Stall in market and second floor, and the coordinate axis with X-axis, Y-axis and Z axis can be utilized to represent the positional information of each base station.Suppose to there are 3 base stations in supermarket, be respectively base station A, base station B and base station C, so can in advance base station A be placed on (0,0,0) point of coordinate axis, base station B is placed on (100 of coordinate axis, 0,0), on point, base station C is placed on (50 of coordinate axis, 50,50) on point.The coordinate information that so server just can get these three base stations is respectively (0,0,0), (100,0,0) and (50,50,50).
In step S23, according to the positional information of each base station and and each base station between distance, calculate the positional information of shopping cart.
Wherein, that shopping cart sends and between each base station distance is received at server, and after getting the positional information of each base station, server just can according to the positional information of each base station and and each base station between distance, calculate the positional information of shopping cart.
Introduce each base station and the mode that calculate the positional information of shopping cart of shopping cart in same plane and not in same plane below respectively.
For each base station and shopping cart are in same plane, refer to the computing method of following example.
Such as, suppose in-site installation 2 base stations, be respectively base station A and base station B, it is D1 that shopping cart has calculated with the distance of base station A, is D2 with the distance of base station B.The coordinate of these two base stations is respectively base station A (x1, y1) and base station B (x2, y2), and these two coordinates are all known, and staff pre-deposits in server.After the distance D1 and D2 with these two base stations is sent to server by shopping cart, server just gets distance D1 and the D2 of shopping cart and these two base stations; Then, server can obtain coordinate (x1, y1) and (x2, the y2) of these two base stations pre-deposited; Finally, suppose that the coordinate of shopping cart is for (x, y), server can list following system of equations: (x1-x)
2+ (y1-y)
2=D1, (x2-x)
2+ (y2-y)
2=D2, because x1, y1, x2, y2, D1 and D2 are known, so can solve above-mentioned system of equations and obtain the coordinate (x, y) of shopping cart, thus makes server obtain the positional information of shopping cart.
For each base station and shopping cart are not in same plane, refer to the computing method of following example.
Such as, suppose in-site installation 3 base stations, be respectively base station A, base station B and base station C, it is D1 that shopping cart has calculated with the distance of base station A, is D2 with the distance of base station B, is D3 with the distance of base station C.The coordinate of these three base stations is respectively base station A (x1, y1, z1), base station B (x2, y2, z2) and base station C (x3, y3, z3), and these three coordinates are all known, and staff pre-deposits in server.After distance D1, D2 and D3 with these three base stations is sent to server by shopping cart, server just gets distance D1, D2 and D3 of shopping cart and these three base stations; Then, server can obtain coordinate (x1, y1, z1), (x2, y2, the z2) and (x3, y3, z3) of these three base stations pre-deposited; Finally, suppose that the coordinate of shopping cart is for (x, y, z), server can list following system of equations: (x1-x)
2+ (y1-y)
2+ (z1-z)
2=D1, (x2-x)
2+ (y2-y)
2+ (z2-z)
2=D2, (x3-x)
2+ (y3-y)
2+ (z3-z)
2=D3, because x1, y1, z1, x2, y2, z2, x3, y3, z3, D1, D2 and D3 are known, so can solve above-mentioned system of equations and obtain coordinate (x, the y of shopping cart, thus make server obtain the positional information of shopping cart z).
Certainly the quantity for base station can be not limited to above-mentioned example, but for each base station and shopping cart are in same plane, the minimum number of base station is two; For each base station and shopping cart are not in same plane, the minimum number of base station is three.
In addition, calculate the positional information of shopping cart at server after, server can also judge that the positional information of shopping cart is whether in predeterminable area, to determine shopping cart whether safety.When server judges that the positional information of shopping cart is not in predeterminable area, illustrate that shopping cart may be stolen or Misuse, server can export warning information, and sends alarm command to shopping cart, to make shopping cart report to the police, thus be convenient to staff and can go and find out what's going on timely.When the positional information of shopping cart is in predeterminable area, illustrate that shopping cart is normally used, so just without the need to reporting to the police.
In the embodiment shown in Figure 2, shopping cart can determine the transmission duration sending wireless signal to each base station, and goes out the distance between each base station according to the transmission speed of wireless signal and transmission duration calculation.Server after receiving that shopping cart sends and distance between each base station, just can according to the positional information of each base station and and each base station between distance, calculate the positional information of shopping cart.Therefore, scheme provided by the invention can position shopping cart fast, thus is convenient to staff and arranges shopping cart and reclaim, and can also ensure that shopping cart can not be lost.
Fig. 3 is the module diagram of a kind of shopping cart according to an exemplary embodiment.With reference to Fig. 3, this shopping cart comprises determination module 11, computing module 12 and sending module 13.Wherein:
Determination module 11, for determining the transmission duration sending wireless signal to each base station.
Computing module 12, the long-pending distance obtained between each base station of transmission speed and transmission duration for calculating wireless signal.
Sending module 13, for the distance between each base station is sent to server, goes out the positional information of shopping cart to make server according to the positional information calculation of each base station of the Distance geometry between each base station.
Optionally, determination module 11 can comprise following submodule: first determines submodule, for when sending wireless signal to each base station, the time sending wireless signal to each base station is defined as the very first time.First obtains submodule, and for when receiving the wireless signal that each base station sends, obtain the second time existed in the wireless signal of each base station transmission, the second time was the time that each base station receives wireless signal.First calculating sub module, the difference for calculating the second time and the very first time obtains transmitting duration.
Optionally, determination module 11 can comprise following submodule: second determines submodule, for when sending wireless signal to each base station, the time sending wireless signal to each base station is defined as the 3rd time.3rd determines submodule, for when receiving the wireless signal that each base station sends, the time receiving the wireless signal that each base station sends is defined as the 4th time.Second obtains submodule, and for obtaining the 5th time and the 6th time that exist in the wireless signal of each base station transmission, the 5th time was the time that each base station receives wireless signal, and the 6th time was the time that each base station sends wireless signal.Second calculating sub module, for according to the 3rd time, the 4th time, the 5th time and the 6th time, calculates the transmission duration sending wireless signal to each base station.
Optionally, shopping cart can also comprise alarm modules.Wherein, alarm modules is used for, when receiving the alarm command that server sends, exporting alarm.
Fig. 4 is the module diagram of a kind of server according to an exemplary embodiment.With reference to Fig. 4, this server comprises receiver module 21, acquisition module 22 and computing module 23.Wherein:
Receiver module 21, for receiving that shopping cart sends and between each base station distance.
Acquisition module 22, for obtaining the positional information of each base station.
Computing module 23, for according to the positional information of each base station and and each base station between distance, calculate the positional information of shopping cart.
Optionally, server can also comprise judge module and output module.Wherein, judge module, for judging that the positional information of shopping cart is whether in predeterminable area; Output module, during for the positional information at shopping cart not in predeterminable area, exports warning information, and sends alarm command to shopping cart.
Fig. 5 is the module diagram of a kind of shopping cart positioning system according to an exemplary embodiment.With reference to Fig. 5, this shopping cart positioning system comprises shopping cart 31, server 32 and at least two base stations 33.Wherein:
Shopping cart 31, for determining the transmission duration sending wireless signal to each base station 33, calculating transmission speed and the long-pending distance obtained between each base station 33 of transmission duration of wireless signal, the distance between each base station 33 is sent to server 32.
Server 32, for receiving shopping cart 31 sends and distance between each base station 33, obtains the positional information of each base station 33, according to the positional information of each base station 33 and and each base station 33 between distance, calculate the positional information of shopping cart 31.
About the device in above-described embodiment, wherein the concrete mode of modules executable operations has been described in detail in about the embodiment of the method, will not elaborate explanation herein.
In sum, scheme provided by the invention can increase substantially the degree of accuracy of shopping cart positioning system, and the location cost of shopping cart is low, thus makes the location of supermarket to shopping cart more convenient and efficient.And by obtaining the positional information of shopping cart, supermarket can also provide navigation Service to client, the commodity that client can find oneself to want easily, improves customer satisfaction.In addition, by monitoring the position of each shopping cart, supermarket can obtain client at residence time in a certain sales counter or region and motion track, thus judges the shopping hobby of client, improves the precision of marketing.
About the device in above-described embodiment, wherein the concrete mode of modules executable operations has been described in detail in about the embodiment of the method, will not elaborate explanation herein.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection domain of claim.
Claims (13)
1. a localization method, is characterized in that, comprising:
Determine the transmission duration sending wireless signal to each base station;
Calculate transmission speed and the long-pending distance obtained between described each base station of described transmission duration of described wireless signal;
Distance between described each base station is sent to server, with the positional information making the positional information calculation of described server each base station according to the Distance geometry between described and described each base station go out described shopping cart.
2. localization method according to claim 1, is characterized in that, describedly determines that the step of the transmission duration sending wireless signal to each base station comprises:
When sending wireless signal to each base station, the time sending wireless signal to described each base station is defined as the very first time;
When receiving the wireless signal that described each base station sends, obtain the second time existed in the wireless signal of described each base station transmission, described second time is the time that described each base station receives wireless signal;
The difference calculating described second time and the described very first time obtains transmitting duration.
3. localization method according to claim 1, is characterized in that, describedly determines that the step of the transmission duration sending wireless signal to each base station comprises:
When sending wireless signal to each base station, the time sending wireless signal to described each base station was defined as the 3rd time;
When receiving the wireless signal that described each base station sends, the time receiving the wireless signal that described each base station sends was defined as the 4th time;
Obtain the 5th time and the 6th time that exist in the wireless signal of described each base station transmission, described 5th time is the time that described each base station receives wireless signal, and described 6th time is the time that described each base station sends wireless signal;
According to described 3rd time, described 4th time, described 5th time and described 6th time, calculate the transmission duration sending wireless signal to each base station.
4. localization method according to claim 1, is characterized in that, described distance between described each base station is sent to server after, also comprise:
When receiving the alarm command that described server sends, export alarm.
5. a localization method, is characterized in that, comprising:
Receive that shopping cart sends and between each base station distance;
Obtain the positional information of described each base station;
According to the positional information of described each base station and and described each base station between distance, calculate the positional information of described shopping cart.
6. localization method according to claim 5, is characterized in that, the described positional information according to described each base station and and described each base station between distance, after calculating the positional information of described shopping cart, also comprise:
Judge that the positional information of described shopping cart is whether in predeterminable area;
When the positional information of described shopping cart is not in predeterminable area, export warning information, and send alarm command to described shopping cart.
7. a shopping cart, is characterized in that, comprising:
Determination module, for determining the transmission duration sending wireless signal to each base station;
Computing module, the long-pending distance obtained between described each base station of transmission speed and described transmission duration for calculating described wireless signal;
Sending module, for the distance between described each base station is sent to server, with the positional information making the positional information calculation of described server each base station according to the Distance geometry between described and described each base station go out described shopping cart.
8. shopping cart according to claim 7, is characterized in that, described determination module comprises:
First determines submodule, for when sending wireless signal to each base station, the time sending wireless signal to described each base station is defined as the very first time;
First obtains submodule, and for when receiving the wireless signal that described each base station sends, obtain the second time existed in the wireless signal of described each base station transmission, described second time is the time that described each base station receives wireless signal;
First calculating sub module, the difference for calculating described second time and the described very first time obtains transmitting duration.
9. shopping cart according to claim 7, is characterized in that, described determination module comprises:
Second determines submodule, for when sending wireless signal to each base station, the time sending wireless signal to described each base station is defined as the 3rd time;
3rd determines submodule, for when receiving the wireless signal that described each base station sends, the time receiving the wireless signal that described each base station sends is defined as the 4th time;
Second obtains submodule, for obtaining the 5th time and the 6th time that exist in the wireless signal of described each base station transmission, described 5th time is the time that described each base station receives wireless signal, and described 6th time is the time that described each base station sends wireless signal;
Second calculating sub module, for according to described 3rd time, described 4th time, described 5th time and described 6th time, calculates the transmission duration sending wireless signal to each base station.
10. shopping cart according to claim 7, is characterized in that, also comprises:
Alarm modules, for when receiving the alarm command that described server sends, exports alarm.
11. 1 kinds of servers, is characterized in that, comprising:
Receiver module, for receiving that shopping cart sends and between each base station distance;
Acquisition module, for obtaining the positional information of described each base station;
Computing module, for according to the positional information of described each base station and and described each base station between distance, calculate the positional information of described shopping cart.
12. servers according to claim 11, is characterized in that, also comprise:
Judge module, for judging that the positional information of described shopping cart is whether in predeterminable area;
Output module, during for the positional information at described shopping cart not in predeterminable area, exports warning information, and sends alarm command to described shopping cart.
13. 1 kinds of shopping cart positioning systems, is characterized in that, comprise shopping cart, server and at least two base stations;
Described shopping cart, for determining the transmission duration sending wireless signal to described each base station, calculate transmission speed and the long-pending distance obtained between described each base station of described transmission duration of described wireless signal, the distance between described each base station is sent to server;
Described server, for receiving that shopping cart sends and between each base station distance, obtain the positional information of described each base station, according to the positional information of described each base station and and described each base station between distance, calculate the positional information of described shopping cart.
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| CN201610044038.8A CN105548961A (en) | 2016-01-22 | 2016-01-22 | Positioning method, shopping cart, server, and shopping cart positioning system |
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| CN201610044038.8A CN105548961A (en) | 2016-01-22 | 2016-01-22 | Positioning method, shopping cart, server, and shopping cart positioning system |
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