CN204143471U - Based on the positioning system of RFID technique - Google Patents

Abstract

The utility model provides a positioning system based on RFID technology. The positioning system includes: a plurality of RFID tags placed at different positions in the positioning area; an RFID reader carried in the positioning area to be determined On the active object of the position, it is used to detect the RFID tag within the detection range of the RFID reader; the positioning server is connected to the RFID reader, used to receive the tag information from the RFID reader, and according to the received tag information to realize the positioning of the active object to be positioned. The embodiment of the utility model solves the technical problems of low positioning accuracy of the positioning system in the prior art, high positioning cost, and high difficulty in engineering application design and construction, and achieves the technical effect of effectively reducing the positioning cost and improving the positioning accuracy.

Description

Positioning system based on RFID technology

technical field

The utility model relates to the technical field of positioning, in particular to a positioning system based on RFID (Radio Frequency Identification, radio frequency identification) technology.

Background technique

The core of production safety is human safety, and it has become a trend to introduce a personnel location monitoring system into the industrial production safety management system. Industrial factories urgently need to use personnel tracking and positioning equipment to automatically track the personnel entering and leaving the job site in real time around the clock, so as to keep track of the location and activity track of each employee on the job site, as well as the location distribution of the workers.

At present, there are some indoor personnel positioning technologies and methods based on RFID technology. In these methods, the main implementation method is to arrange RFID readers in the field area, and then the personnel carry RFID tags, so that the RFID readers read the The information of the RFID tags within the range (that is, tag data), and then transmit the read tag data to the remote server through Ethernet or field bus.

However, due to the difficulty in design and construction of the RFID reader, the high comprehensive cost, and the limited reading distance, it is difficult to make the RFID reader cover the entire industrial site, and the positioning accuracy of the system is very limited. If a disaster occurs on the industrial site, the positioning accuracy is not high. , the most effective rescue cannot be carried out.

For the above problems, no effective solution has been proposed yet.

Utility model content

The embodiment of the utility model provides a positioning system based on RFID technology to solve the technical problems of low positioning accuracy and high positioning cost of the positioning system in the prior art. The system includes:

A plurality of RFID tags, the plurality of RFID tags are placed in different positions in the positioning area;

An RFID reader, carried on the active object to be positioned in the positioning area, for detecting RFID tags within the detection range of the RFID reader;

A positioning server, connected to the RFID reader, is used to receive the tag information from the RFID reader, and realize the positioning of the moving object to be positioned according to the received tag information.

In one embodiment, the RFID tag is a passive RFID radio frequency tag.

In one embodiment, the RFID reader is a handheld terminal or a card-shaped device.

In one embodiment, the movable object to be positioned is a person, and the RFID reader is provided with a component that can be fixed with the person.

In one embodiment, the component capable of being fixed to a person includes: a buckle, a ring-shaped belt, or a ring-shaped wrist strap.

In one embodiment, the RFID reader is provided with a wireless sending module, and the positioning server is provided with a wireless receiving module, and the RFID reader communicates with the wireless receiving module through the wireless sending module and the wireless receiving module. The positioning server is connected wirelessly.

In one embodiment, the wireless mode includes at least one of the following: ZigBee, GPRS, WIFI, and Bluetooth.

In one embodiment, the above positioning system further includes: a display terminal, connected to the positioning server, configured to receive the positioning information sent from the positioning server, and display the positioning information.

In the embodiment of the utility model, a positioning system based on RFID technology is provided. In this system, RFID tags are placed in the positioning area, and RFID readers are placed on the objects to be positioned, so that the number of RFID readers can be effectively reduced. The amount of usage can save costs. At the same time, if you need to improve the positioning accuracy, you only need to add RFID tags, and you don’t need to add additional RFID readers. This solves the problem of low positioning accuracy, high positioning costs, and engineering applications in the existing technology. The technical problems of difficult design and construction have been solved, and the technical effect of effectively reducing the positioning cost has been achieved.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the utility model, constitute a part of the application, and do not constitute a limitation to the utility model. In the attached picture:

Fig. 1 is a kind of system architecture diagram of the positioning system based on RFID technology according to the utility model embodiment;

2 is another system architecture diagram of a positioning system based on RFID technology according to an embodiment of the present invention;

Fig. 3 is another system architecture diagram of a positioning system based on RFID technology according to an embodiment of the present invention.

Fig. 4 is a flowchart of a method for using a positioning system based on RFID technology according to an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below in combination with the embodiments and accompanying drawings. Here, the exemplary implementation of the utility model and its description are used to explain the utility model, but not as a limitation to the utility model.

The inventor considers that the existing positioning systems based on RFID technology all adopt RFID tags installed on the objects to be positioned, and RFID readers are installed in the positioning area, and the RFID readers read the IDs of the RFID tags entering its detection range. Then return the read ID to the server for processing, so that the server can determine the location of the object according to the returned ID and the location of the reader who returned the information. In this way, if you want to improve the location If the accuracy is high, it is necessary to place more RFID readers in the positioning area. However, the cost of general RFID readers is very high, and large-scale deployment will require high costs.

For this reason, the inventor thinks that reverse thinking can be used to realize positioning. Specifically, the positioning tag can be set in the positioning area, and then the object to be positioned carries an RFID reader after entering the positioning area. If you want to improve the positioning accuracy, Simply increase the number of RFID tags in the system, which can effectively reduce the cost of positioning.

Specifically, in this example, a positioning system based on RFID technology is provided, as shown in Figure 1, including:

A plurality of RFID tags 101, the plurality of RFID tags are placed in different positions of the positioning area;

The RFID reader 102 is carried on the active object to be positioned in the positioning area, and is used to detect the RFID tag within the detection range of the RFID reader, and send the detected RFID tag identification to the positioning server;

The positioning server 103 is connected with the RFID reader, and is used to receive the tag information from the RFID reader, and realize the positioning of the active object to be positioned according to the received tag information.

In the above embodiment, a positioning system based on RFID technology is provided. In this system, RFID tags are placed in the positioning area, and RFID readers are placed on the objects to be located, so that the use of RFID readers can be effectively reduced. At the same time, if you need to improve the positioning accuracy, you only need to add RFID tags, and no additional RFID readers are needed, thus solving the problems of low positioning accuracy, high positioning cost, and engineering application design in the existing technology. , The technical problem of difficult construction has achieved the technical effect of effectively reducing the positioning cost.

Considering the cost of the tag, the RFID tag 101 used in this example is preferably a passive RFID radio frequency tag. Specifically, as shown in Figure 1, RFID tags can be installed on the wall, or on the ground, equipment, pipelines, etc. The specific laying can be independently selected according to actual needs.

In a specific implementation process, the aforementioned RFID reader 102 may be placed on a moving object, such as a moving object such as a person, an animal, or an automatic sweeping robot.

Take the inspection personnel of the factory building as the active object to be located, and the factory building as an example for illustration. In order to make it easy for the personnel to be located to carry this RFID reader, it can be set as a handheld terminal, or it can be installed on it. Set a component that can be fixed with a person, or make it a device that can be placed in a pocket, for example, set a belt on the RFID reader so that the person to be positioned can directly wear it on the waist, which can be effective Improve the convenience and comfort of wearing. Further, the parts that can be fixed with people can be: buckles, ring belts, etc., as long as they are easy to carry, for example, they can also be made into wristbands, or Make it in the form of a card and put it in your pocket.

Specifically, because the RFID reader 102 is carried by the object to be positioned, the detected signal needs to be sent back to the positioning server for processing. Therefore, a communication module needs to be set in it, and this communication module also needs to be wireless. Correspondingly, a wireless receiving module needs to be provided in the positioning server 103, a wireless transmitting module is provided in the RFID reader 102, and the RFID reader 102 is wirelessly connected to the positioning server through the built-in wireless transmitting module and the wireless receiving module, wherein , the above-mentioned wireless methods may include but not limited to at least one of the following: ZigBee, GPRS, WIFI, Bluetooth, and other wireless methods may also be used, which are not limited in this application.

As shown in Figure 2, a data communication system 104 can also be set between the positioning server 103 and the RFID reader 102, and the information that the RFID reader 102 needs to transmit to the positioning server 103 is forwarded to the positioning server 103 by the data communication system 104 .

As shown in Figure 3, the positioning system based on RFID technology can also be provided with a display terminal 105. This display terminal can be a computer, or a smart phone, etc. The main function of this display terminal is to receive information from the location The positioning information sent by the server 103 is displayed and processed. The positioning server 103 and the display terminal 105 may be connected in a wired or wireless manner, which is not limited in this application.

As shown in Figure 4, it is the method of using the positioning system based on RFID technology in the above-mentioned Figures 1 to 3, which mainly includes the following steps:

Step 401: placing multiple RFID tags at different positions in the positioning area;

Step 402: placing the RFID reader on the active object to be located within the positioning area;

Step 403: When the active object to be positioned moves within the positioning area, the RFID reader detects the RFID tags within the detection range of the RFID reader, and sends the detected tag information to the positioning server;

Step 404: The positioning server locates the active object to be positioned according to the tag information.

For example, in a warehouse, there are 50 RFID tags set according to predetermined rules or distances, and the staff wear RFID readers and enter the warehouse, then the RFID readers worn by the staff can detect the tags on their own after entering the warehouse. If there is an RFID tag detected within this range, then the ID of the RFID tag is obtained, and then the ID is returned to the positioning server, because the positioning server stores the ID of the RFID tag and its location The corresponding relationship, then you can simply determine the approximate location of the staff. Furthermore, if you want to improve the accuracy of detection and positioning, you can place more RFID tags, which is more convenient for precise positioning. Considering that in the process of actual operation, one RFID reader may detect multiple RFID tags at the same time. At this time, you can select the RFID tag with strong signal to read according to the signal strength of the RFID tag. In the above example, the corresponding relationship between the ID of the RFID tag and its location is stored in the positioning server, so it is only necessary to provide the ID of the RFID tag to the positioning server, and the corresponding relationship can also be stored in the RFID reader. In this way, after the RFID reader obtains the identification of the RFID tag, it can directly determine its approximate location, and then inform the positioning server of the determined location information, without the need for a positioning server to perform matching. There is another way to realize that the RFID tag stores its own location information, that is, when the RFID reader detects the RFID tag, it has already directly obtained the location information from the RFID tag. The logo is set to its location information and so on. That is, the one-to-one correspondence between the position information and the identification of the RFID tag can be stored in the positioning server, can also be stored in the RFID reader, and the position information can also be directly stored in the passive RFID tag.

In the process of specific implementation, the tag information sent by the RFID reader to the positioning server may be the tag identification of the RFID tag within the detection range of the RFID reader, or the position information of the RFID tag within the detection range of the RFID reader. Specifically, the location information may be carried in the RFID tag, or determined by the RFID reader according to the correspondence between the tag identifier and the location information stored by itself. If the tag information is the tag identification of the RFID tag, then the positioning server realizes the positioning of the active object to be positioned according to the tag information, which may include: the positioning server determines the position of the RFID tag according to the correspondence between the tag identification and the position information stored by itself information, and realize the positioning of the active object to be positioned according to the determined position information.

In order to achieve the purpose of saving the power of the RFID reader, the RFID reader does not need to perform detection all the time, but can perform detection according to a predetermined time interval, for example: perform detection every 2 minutes and so on.

In the process of specific implementation, the positioning server 103 should be able to realize parallel operation, that is, it can process the information read by multiple RFID readers at the same time, and realize the positioning of multiple objects to be positioned at the same time. Specifically, the positioning server 103 103 receives the identifications of the RFID tags sent by multiple RFID readers in parallel, and realizes the positioning of multiple active objects to be positioned in parallel according to the one-to-one correspondence between the pre-stored RFID tags and the placement positions, wherein the RFID tags The one-to-one correspondence with the placement location is stored in the form of a table, text or database. Further, since it is necessary to locate a plurality of objects to be positioned, it is necessary to set an identification for each RFID reader, and establish a corresponding relationship between the identification of the reader and the user (that is, the object to be located), then in When the RFID reader sends the detected tag information to the positioning server, the RFID reader also needs to send the identification of the RFID reader to the positioning server. Which active object to locate.

Describe below in conjunction with a specific embodiment, as shown in Figure 3, this positioning system based on RFID technology includes: RFID positioning tag, RFID reader, data communication system, positioning server, display terminal (for example: intelligent terminal or client computers, etc.), wherein the positioning server, intelligent terminal and client computer can be connected to the data communication system through network cables, optical fibers or wirelessly, wherein the RFID positioning tags are fixed on the industrial site, and the RFID readers are connected wirelessly In the data communication system, the RFID reader is connected to the positioning tag through radio frequency communication.

Specifically, the RFID positioning tag can be a passive RFID radio frequency tag, for example, a UHF (UltraHigh Frequency, UHF) passive tag can be selected, each positioning tag contains a unique ID, and the positioning tag is fixed on the site where personnel positioning is required area. An RFID reader is worn by the located object to detect and transmit location data of the located object.

At the same time, set a unique corresponding ID for the RFID reader. This ID can be the MAC address in network communication. The data communication system provides a data transmission channel between the RFID reader and the upper device. You can choose but not limited to the following one or A variety of communication methods: ZigBee, GPRS, WiFi, or Bluetooth, etc., preferably, WiFi wireless network communication can be used.

The corresponding relationship between the positioning tag ID and the actual location of the field area is stored in the positioning server. Preferably, it can be stored in the form of a database or a document. There are APP software and application programs installed on the smart terminal and the client computer. These APP software and The application program can obtain the location information of personnel from the positioning server, and has the functions of real-time location tracking of personnel, safety warning and so on.

In the specific implementation, the RFID reader worn on the object to be positioned is used to obtain the location information in the positioning tag, so as to realize the location of the monitored object, and the location data obtained by the RFID reader and its own ID are obtained by means of a wireless network. Sent to the positioning server for processing. However, from the perspective of communication methods, positioning servers and data communication systems can transmit information and data through wired communication methods (such as network cables, optical fibers, etc.), while data communication systems and RFID readers are connected wirelessly. Yes, information and data are transmitted through wireless communication.

In this example, the personnel positioning system can support the work of multiple RFID readers at the same time, and for each positioned object, it only needs to wear one RFID reader, and the applicable positioned objects are not limited to patrolling in industrial environments. It is also suitable for children, patients, the elderly, objects, etc. that need to be monitored in a specific environment.

When implementing it, the RFID reader can be worn on a certain part of the body of the positioned object. Considering that wearing it on the waist will give the positioned object the greatest wearing comfort, the RFID reader can be worn on the waist of the positioned object. This also does not affect the physical activity of the located object.

In this example, in order to realize the positioning function of indoor personnel and improve the accuracy and effect of positioning, a reverse positioning system and method for indoor personnel based on RFID technology are provided, wherein the RFID positioning tag is an ordinary RFID radio frequency tag with The advantage of low cost makes it suitable for a large number of flexible deployments in complex industrial environments. Data communication can be flexibly selected to communicate with ZigBee, GPRS, WiFi, Bluetooth and other communication methods according to the actual environment on site. RFID readers are the most popular on the market. Visible handheld terminals with RFID card reading function and data transmission function, etc.

The software platform of the system has the functions of real-time positioning and tracking of personnel, safety warning, emergency quick search and other functions, and is mainly aimed at personnel positioning in the indoor environment of industrial factories. In normal production and life, the management of the personnel positioning system can be used to perform real-time positioning and track tracking of the positions and trajectories of each staff member. Specific location information for rescue.

From the above description, it can be seen that the embodiment of the utility model has achieved the following technical effects: a positioning system based on RFID technology is provided, in which the RFID tag is placed in the positioning area, and the RFID reader is placed On the object to be positioned, it can effectively reduce the usage of RFID readers and save costs. At the same time, if you need to improve the positioning accuracy, you only need to add RFID tags, and no additional RFID readers are needed, thus solving the problems in the prior art. The technical problems of the positioning system, such as low positioning accuracy, high positioning cost, and difficulty in engineering design and construction, have achieved the technical effect of effectively reducing the positioning cost.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. For those skilled in the art, various modifications and changes may be made to the embodiments of the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (8)

1. based on a positioning system for RFID technique, it is characterized in that, comprising:

Multiple RFID label tag, described multiple RFID label tag is placed on the diverse location of locating area;

RFID reader, is carried in moving object to be positioned in described locating area, for detecting the RFID label tag in described RFID reader sensing range;

Location-server, is connected with described RFID reader, for receiving the label information from described RFID reader, and realizes the location to described moving object to be positioned according to the label information received.

2. positioning system as claimed in claim 1, it is characterized in that, described RFID label tag is passive RFID radio-frequency (RF) tag.

3. positioning system as claimed in claim 1, it is characterized in that, described RFID reader is handheld terminal or card-like equipment.

4. positioning system as claimed in claim 1, is characterized in that, described moving object to be positioned is behaved, and described RFID reader is provided with the parts that can realize fixing with people.

5. positioning system as claimed in claim 4, it is characterized in that, the described parts realizing fixing with people comprise: buckle, ring-like belt or ring-type wrist strap.

6. positioning system as claimed in claim 1, it is characterized in that, wireless sending module is provided with in described RFID reader, wireless receiving module is provided with in described location-server, described RFID reader, by described wireless sending module and described wireless receiving module, is wirelessly connected with described location-server.

7. positioning system as claimed in claim 6, is characterized in that, described wireless mode comprise following one of at least: ZigBee, GPRS, WIFI, bluetooth.

8. the positioning system according to any one of claim 1 to 7, is characterized in that, also comprises: display terminal, is connected with described location-server, for receiving the locating information sended over from described location-server, and shows described locating information.