CN112333636A - Device and method for indoor object searching - Google Patents
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- H04W4/02—Services making use of location information
- H04W4/021—Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
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- G06F16/9537—Spatial or temporal dependent retrieval, e.g. spatiotemporal queries
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10019—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers.
- G06K7/10079—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers. the collision being resolved in the spatial domain, e.g. temporary shields for blindfolding the interrogator in specific directions
- G06K7/10089—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers. the collision being resolved in the spatial domain, e.g. temporary shields for blindfolding the interrogator in specific directions the interrogation device using at least one directional antenna or directional interrogation field to resolve the collision
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- G10L15/00—Speech recognition
- G10L15/22—Procedures used during a speech recognition process, e.g. man-machine dialogue
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/33—Services specially adapted for particular environments, situations or purposes for indoor environments, e.g. buildings
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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Abstract
The invention provides a device and a method for indoor object searching, wherein the device comprises an article, a positioning module, a handheld module and a control module, and the method comprises the following steps of S1: sending an object searching instruction containing target object information by using a handheld module; s2: carrying out keyword matching on the object searching instruction, and if the matching is successful, entering S3; if the matching fails, returning to S1; s3: the control module acquires coordinate positions of a target object and the handheld module; s4: the control module calculates the position relation and the distance between the target object and the handheld module and plans a path; s5: the control module sends the planned path to the handheld module; s6: the handheld module identifies information on the object electronic tag and sends the information to the control module; s7: and the control module sends the information comparison result to the handheld module. The invention can update and identify the position and information of the article in real time, and assist people with inconvenient actions to realize fast indoor object searching.
Description
Technical Field
The invention relates to the technical field of article positioning, in particular to an indoor article searching device and method.
Background
In real life, when people who are disabled to move, such as old people and blind people, look for objects indoors, the people are easily injured due to the fact that the placing positions of the objects cannot be known in time.
In the prior art, in order to help people with inconvenient actions, an RFID technology is generally adopted to locate articles and then prompt the positions of the articles and walking paths, however, in the implementation logic in the prior art, the articles are placed at fixed positions to form a fixed azimuth anchor point, and once the positions of the articles are changed, the prior art cannot identify the positions of the articles, so that the whole technical scheme cannot be realized, and the requirements of real life cannot be met.
Disclosure of Invention
In order to solve the problems, the application provides an indoor object searching device and method, which can be used for positioning and planning paths of objects in real time and meet the requirements of life.
The invention discloses the following technical scheme:
the embodiment of the invention provides a device for indoor object searching, which comprises:
the system comprises articles, wherein any article is provided with an electronic tag containing article identity information;
the positioning module comprises a plurality of positioning base stations and is used for positioning indoor articles and the handheld module in real time;
the handheld module is used for sending an object searching instruction and an article identification instruction to the control module and receiving control information fed back by the control module;
and the control module is used for receiving the object searching instruction and the article identification instruction sent by the handheld module, sending article position information and path information to the handheld module by using the positioning module, and feeding back article information according to the article identification instruction.
Further, the hand-held module comprises:
the active RFID label is used for identity identification and position identification;
the electronic tag reader-writer is used for triggering and comparing the information of the electronic tag on the article;
the first information sending unit is used for sending an object searching instruction to the control module;
and the first information receiving unit is used for receiving the control information fed back by the control module.
Further, the first information sending unit sends the object searching command through one or more of the following input modes: mechanical keys, voice recognition, a selection switch and keyboard input.
Further, the control module includes:
the second information receiving unit is used for receiving the instruction information sent by the first information sending unit or the electronic tag reader;
the first position acquisition unit is used for acquiring the position information of the handheld module;
a second position acquisition unit for acquiring position information of the target item;
the path planning unit is used for calculating an acquisition path between the handheld module and the target object;
the information comparison unit is used for comparing the article information sent by the electronic tag reader;
and the information feedback unit is used for sending the path information or the article information to the handheld module.
With the above device, the present invention also provides a method for indoor object finding, which comprises:
s1: sending an object searching instruction containing target object information by using a handheld module;
s2: carrying out keyword matching on the object searching instruction, and if the matching is successful, entering S3; if the matching fails, returning to S1;
s3: the control module acquires coordinate positions of a target object and the handheld module;
s4: the control module calculates the position relation and the distance between the target object and the handheld module and plans a path;
s5: the control module sends the planned path to the handheld module;
s6: the handheld module identifies information on the object electronic tag and sends the information to the control module;
s7: and the control module sends the information comparison result to the handheld module.
Further, in any process of steps S1-S5, if the handheld module re-issues a new object-finding instruction, the process jumps to step S1 again for execution.
Further, in step S6, the method for identifying the electronic tag of the article by the handheld module includes: and when the distance between the handheld module and the target object is smaller than a set threshold value, the handheld module starts the identification of the object electronic tag.
The invention has the beneficial effects that:
compare in prior art with the processing mode of object position solidification, this application is after the identification process of accomplishing an object, when the people uses article, because be in the threshold value within range between electronic tags on the article and the handheld module always, the electronic tags of object can be in the activated state always, when the people does not use article, article leave the electronic tags that just can make the object after the human certain distance and close, at this moment, the disappearance position of object signal will be as in the newest position update of object to control module, realize the real-time update of article position.
In addition, for the transmission of the object searching instruction, various transmission modes are provided, and various requirements of actual life are met.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is a flow chart of an embodiment of the method of the present invention;
FIG. 3 is a schematic diagram of the positioning algorithm of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments. It will be appreciated by those of skill in the art that the following specific examples or embodiments are a series of presently preferred arrangements of the invention to further explain the principles of the invention, and that such arrangements may be used in conjunction or association with one another, unless it is expressly stated that some or all of the specific examples or embodiments are not in association or association with other examples or embodiments. Meanwhile, the following specific examples or embodiments are only provided as an optimized arrangement mode and are not to be understood as limiting the protection scope of the present invention.
Examples
The embodiment of the invention provides a device for finding objects indoors, which comprises a control terminal at the upper left corner, a positioning system consisting of three base stations, a person holding a handheld end and various articles attached with electronic tags, as shown in figure 1.
The shape of the handheld end can be defined according to the actual situation, for convenience of use, the handheld end can be made into a glove shape, and each unit on the handheld end can be set as follows:
active RFID tag: taking a person as an article in the system, and judging the position relationship between the person and the required article through a positioning system;
handheld RFID reader: when the old people take the article, the passive RFID tag is activated by the handheld RFID reader, the electronic tag sends radio frequency information to the reader, the reader compares the processed information with information in a terminal database, and the article information obtained after comparison is displayed;
bluetooth module 1: the earphone function is used for receiving an input voice signal and sending the voice signal to the terminal;
bluetooth module 2: and a loudspeaker function, namely outputting the direction prompt (southeast, northwest) of the article.
It should be noted that, in practical use, the bluetooth module 1 may be replaced by a mechanical key, a selection switch, a keyboard input, and the like.
With the above apparatus, an embodiment of the present invention further provides a method for indoor object finding, as shown in fig. 2, the method includes the following steps:
s1: and sending an object searching instruction containing target object information by using the handheld module. With the combination of the above device, the steps are specifically: .
S2: carrying out keyword matching on the object searching instruction, and if the matching is successful, entering S3; if the matching fails, return is made to S1.
The specific implementation process of step S2 is as follows: and carrying out voice recognition through science news and carrying out keyword matching according to a voice recognition result. If the keyword is not in the database or the result is not recognized, giving a prompt: if the article is not matched, please re-input the voice; if the system identifies the keyword, prompting: it is good to understand that i will locate an item for you.
S3: and giving the coordinate position of the object by combining the voice recognition result through an indoor article positioning system set up by the third group.
S4: and calculating the position relation and distance between the coordinates of the person and the coordinates of the object, and giving a corresponding voice prompt through Bluetooth voice.
S5: the control module sends the planned path to the handheld module; and if the old people inquire the distance of the target object again in the process of walking to the target object, recalculating the distance relation between the old people and the coordinates of the object, and prompting by voice. Or the old people can be actively prompted by voice when the distance between the old people and the article is farther and farther.
S6: the coordinates of the middle-aged and old people and the coordinates of the target object can be updated in real time in the whole navigation process, and when the distance between the two coordinates is smaller than a certain threshold value, the handheld module identifies the information on the object electronic tag and sends the information to the control module.
S7: the program will call the item information obtained by the first group of handheld RFID systems and compare it with the result of the voice recognition, and if the result is the same, it will prompt to take the correct item.
In the implementation process of the method, the following principle is adopted for the implementation of positioning:
sensor position of indoor positioning system referring to fig. 1, the whole positioning involves the following devices: a wireless communication base station: 3, the number of the cells is 3; a radio frequency tag: 4 building system reference tags +1 glove built-in tags + n article identification tags.
Based on the positioning system shown in fig. 1, the present application adopts a triangulation algorithm:
the basic principle of RFID location is to read characteristic information (such as identity ID, received signal strength, etc.) of a target RFID tag through a set of fixed readers, and determine the location of the tag.
The relationship between the received signal strength of a wireless signal and the signal transmission distance can be represented by equation (1), where RSSI is the received signal strength, d is the distance between the transceiving nodes, and n is the signal propagation factor.
RSSI＝-(A+10·n lgd) (1)
Three base stations A, B and C which are not collinear and an unknown terminal D are arranged on the plane, the distances from the three base stations to the terminal D are measured to be R1, R2 and R3 respectively, three intersected circles can be drawn by taking the coordinates of the three base stations as the circle center and the distances from the three base stations to the unknown terminal as the radius, and as shown in figure 3, the unknown node coordinates are the intersection points of the three circles.
The two-dimensional system building process by utilizing the principle comprises the following steps: a server side acquires A, B, C reference label signals captured by three base stations; calculating the distance between the label and the base station according to the formula (1); selecting the position of the label 1 as a coordinate origin; selecting a connecting line of the label 1 and the label 2 as an x-axis direction, and selecting a connecting line of the label 1 and the label 4 as a y-axis direction; according to the actual placement position of the label, the positive direction of the x axis is defined as east, and the positive direction of the y axis is defined as south; and establishing a two-dimensional plane coordinate system corresponding to the three-dimensional world.
Assuming the position node D (x, y), coordinates of three points A, B, C are known as (x1, y1), (x2, y2), (x3, y3), and distances to D are D1、d2、d3The position of D can then be solved by any two of the following equations:
and after the solution is completed, the RFID label is matched with the article name database, and the article coordinate is updated in real time.
It should be noted that, due to the error of the signal measurement, the above formula may be solved, so the following 3 cases are referred to:
1) when 3 circles have a common area, the common area necessarily has 3 intersection points, and the 3 intersection points are used as triangles, so that the coordinate of the label to be detected is the coordinate of the inner center of the triangle.
2) When two are intersected without a public area, two public areas are inevitable. And (3) taking the middle point of the connecting line of the two intersection points of the two circle intersection areas, and making a triangle by using the 3 middle points, wherein the inner center of the triangle is the coordinate of the inner center of the label to be detected.
3) Abandoning when 3 circles do not intersect, accepting the next group of nearest 3 reference labels, if the intersection condition is not found for 3 times, using the positions made by the 3 reference labels as triangles, and the center of the triangles is the position of the label to be detected.
By combining the above principle and steps, the old people find the mobile phone as an example to demonstrate the whole implementation process:
the elderly issue instructions: i want to find the handset. The glove receiver receives a voice command and sends the voice command to a computer end, voice recognition is carried out, the result of the voice recognition is that 'the user wants to find a mobile phone', then the position coordinate of the mobile phone and the position coordinate of the user are called from an indoor positioning system (real-time refreshing), then the relation of the two coordinates is judged, the general position of an article of the old is prompted through voice (the old is used as an original point), when the old takes the article (the distance between the two coordinates is smaller than a certain threshold value), a passive electronic tag is activated by a handheld rf (radio identification) reader-writer, information of the taken article is returned, at the moment, a background program can judge whether the correct article is taken, and voice prompt is sent.
It should be noted that the above-described embodiments allow those skilled in the art to more fully understand the specific structure of the present invention, but do not limit the invention in any way. Therefore, although the present invention has been described in detail in the specification and drawings and the examples, it will be understood by those skilled in the art that the present invention may be modified and equivalents may be substituted; all technical solutions and modifications thereof which do not depart from the spirit and scope of the present invention are intended to be covered by the scope of the present invention.
Claims (7)
1. An apparatus for indoor object searching, comprising:
the system comprises articles, wherein any article is provided with an electronic tag containing article identity information;
the positioning module comprises a plurality of positioning base stations and is used for positioning indoor articles and the handheld module in real time;
the handheld module is used for sending an object searching instruction and an article identification instruction to the control module and receiving control information fed back by the control module;
and the control module is used for receiving the object searching instruction and the article identification instruction sent by the handheld module, sending article position information and path information to the handheld module by using the positioning module, and feeding back article information according to the article identification instruction.
2. The apparatus of claim 1, wherein the hand-held module comprises:
the active RFID label is used for identity identification and position identification;
the electronic tag reader-writer is used for triggering and comparing the information of the electronic tag on the article;
the first information sending unit is used for sending an object searching instruction to the control module;
and the first information receiving unit is used for receiving the control information fed back by the control module.
3. The device as claimed in claim 2, wherein the first information sending unit sends the object-searching command by one or more of the following input methods: mechanical keys, voice recognition, a selection switch and keyboard input.
4. The apparatus of claim 2, wherein the control module comprises:
the second information receiving unit is used for receiving the instruction information sent by the first information sending unit or the electronic tag reader;
the first position acquisition unit is used for acquiring the position information of the handheld module;
a second position acquisition unit for acquiring position information of the target item;
the path planning unit is used for calculating an acquisition path between the handheld module and the target object;
the information comparison unit is used for comparing the article information sent by the electronic tag reader;
and the information feedback unit is used for sending the path information or the article information to the handheld module.
5. A method for indoor object finding, which is implemented by the device of any one of claims 1-4, the method comprising:
s1: sending an object searching instruction containing target object information by using a handheld module;
s2: carrying out keyword matching on the object searching instruction, and if the matching is successful, entering S3; if the matching fails, returning to S1;
s3: the control module acquires coordinate positions of a target object and the handheld module;
s4: the control module calculates the position relation and the distance between the target object and the handheld module and plans a path;
s5: the control module sends the planned path to the handheld module;
s6: the handheld module identifies information on the object electronic tag and sends the information to the control module;
s7: and the control module sends the information comparison result to the handheld module.
6. The method as claimed in claim 5, wherein in any of steps S1-S5, if the handheld module re-issues a new object-seeking command, the process goes back to step S1.
7. The method for indoor article finding according to claim 5, wherein in step S6, the method for identifying the electronic tag of the article by the handheld module is: and when the distance between the handheld module and the target object is smaller than a set threshold value, the handheld module starts the identification of the object electronic tag.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113051944A (en) * | 2021-03-24 | 2021-06-29 | 海南电网有限责任公司信息通信分公司 | Wireless distributed rapid object searching method and system |
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