CN201061167Y - An Indoor Positioning System Based on Wireless Transmission Network - Google Patents

Abstract

The utility model relates to an indoor positioning system based on a wireless transmission network, which comprises a wireless network and an upper management server; the wireless network comprises a mobile node, a billboard node, a transmission node, and a central processing node which transmitting wireless signals in sequence, and the central processing node is connected with the upper management server through a computer communication interface; each node comprises a wireless communication module, a central processor, a memory and a power supply module which are mutually connected. The utility model has the advantages that the accurate indoor positioning is realized.

Description

An Indoor Positioning System Based on Wireless Transmission Network

(1) Technical field

The utility model relates to a wireless positioning system, in particular to an indoor positioning system and a positioning method based on a wireless transmission network.

(2) Background technology

In recent years, with the increasing demand for positioning information, outdoor positioning systems such as GPS have been used more and more widely, providing great help to various users who work in open outdoor environments. At the same time, coal mines, hospitals, airports, exhibition halls, shopping centers, warehouses, underground parking lots, etc. all need to use accurate indoor positioning information to achieve efficient management of available space, personnel or inventory materials, and improve their own functions. The GPS positioning system is only suitable for outdoor use, and the development and design of the indoor positioning system have also aroused people's attention. At present, most science and technology museums have not adopted a positioning system. Most of the audiences of science and technology museums are children, and it is difficult for children to find them in the museum.

(3) Contents of utility model

In order to make up for the deficiencies of the prior art, the utility model provides an indoor positioning system and positioning method based on a wireless transmission network capable of personnel positioning query.

The utility model is achieved through the following technical solutions:

The indoor positioning system based on the wireless transmission network of the utility model is special in that: the system is composed of a wireless network and an upper management server; Node, the central processing node is connected with the upper management server through the computer communication interface; each node includes a wireless communication module, a central processing unit, a memory, and a power supply module connected to each other.

In the indoor positioning system based on the wireless transmission network of the present invention, the wireless network further includes a card issuing node and a card receiving node that directly send wireless signals to the central processing node. The card-issuing node is placed at the entrance to know the start of the visitor's visit, and the card-receiving node is placed at the exit to know the end of the visitor's tour route, so as to facilitate the statistics of a visitor's location and visit information.

In the indoor positioning system based on the wireless transmission network of the present invention, due to the limited energy of the battery, energy saving should be considered, and each node also includes a charging circuit connected to the power module.

The beneficial effect of the utility model is that the indoor precise positioning is realized, the structure is simple, the reliability is high, the wireless node has the advantages of small size, rechargeable, anti-interference, low power consumption, etc., and is mainly used in science and technology museums to realize Personnel positioning and exhibit attention design, booth current population statistics, can also be used as exhibits in science and technology museums, and can also be used for positioning in other places, such as coal mines, hospitals, airports, fire protection and many other industries.

(4) Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described.

Accompanying drawing is the structural representation of the utility model.

Figure 1 is a system hardware connection diagram, Figure 2 is a block diagram of a central processing node, Figure 3 is a charging circuit diagram, and Figure 4 is a work flow chart.

(5) Specific implementation methods

Accompanying drawing 1-4 is a kind of specific embodiment of the present utility model.

The indoor positioning system based on the wireless transmission network of the utility model is composed of a wireless network and an upper management server; the wireless network includes a mobile node, a booth node, a transmission node, and a central processing node that sequentially transmit wireless signals, and the central processing node communicates through a computer. The interface is connected to the upper management server; the wireless network also includes a card issuing node and a card receiving node that directly send wireless signals to the central processing node, and these two nodes are respectively placed at the entrance and exit of the room. Each node includes a wireless communication module connected to each other, a central processing unit and a memory, a power module, and a charging circuit connected to the power module. as shown in picture 2. Each node is the same in hardware design, but different in transmission distance and software function realization.

The indoor positioning system based on the wireless transmission network of the utility model realizes a self-organizing network by using wireless nodes and upper management servers, and is mainly used in science and technology museums. Specifically, static nodes are deployed in the science and technology management, and personnel carry a mobile node with them. Through the central processing node, the location of personnel is transmitted to the upper management server in real time, and the upper management server realizes functions such as positioning and query of science popularization exhibits and personnel in the museum, and can also be used to demonstrate wireless sensor network technology. The system needs to be used with the background control software and database.

The wireless transmission network-based indoor positioning system of the present invention, as shown in Figure 1, is to place a booth node on each exhibit by deploying some static nodes in the science and technology museum. If some exhibits have a relatively large area, they can be placed Multiple booth nodes, number these nodes and store them in the background database, and then place some transmission nodes for forwarding information in appropriate positions, responsible for uploading the data information uploaded by the booth nodes to the central processing node, and two other Special nodes, that is, card-issuing nodes and card-receiving nodes, can know the beginning and end of a visitor's tour route, so as to count information such as a visitor's location and visit. All the data information of each node is finally transmitted to the central processing node. The central processing node communicates with the management server through the serial port. Finally, the management server can input the tourist number to be searched to know the tourist's location or visiting route and other information. The central processing node is composed of an information center and a data repository.

In the indoor positioning system based on the wireless transmission network of the utility model, each node is powered by a 780mA.h lithium battery. Due to the limited energy of the battery, the energy will be exhausted after a period of use, so in addition to considering energy saving in the software, A charging circuit is also provided on the node. As shown in Figure 3, 4V~6V is used for charging, and U1 is a battery charger. The charger is equipped with a channel transistor LED, which has current sensing and reverse discharge protection functions, which can simplify the number of components required for design. 1 of U1 The pin is the status indicator, the LED can be used as the charging indicator light, the light is on when charging, and the light is off when the battery is fully charged. The 3 pin of U1 is the battery control output, U2 is the lithium battery, U3 is the voltage regulator, and the Pin 5 is the voltage output pin, which is 3.3V, and can directly supply power to the chip, c3 is a bypass capacitor, which can reduce output noise, and c4 is an output capacitor.

In the indoor positioning system based on the wireless transmission network of the utility model, the wireless network adopts the ZigBee protocol, which realizes a layered tree network topology structure, and can dynamically self-organize to form a network. After the central processing node restarts, all the following nodes can Dynamic self-organization joins the network, which reduces the complexity of network deployment and construction, and can flexibly change the topology of the network according to the needs of the site.

The indoor positioning method based on wireless transmission network of the present utility model, as shown in Figure 4, comprises the following steps:

a. Number the mobile node at the entrance of the room and send it to the tourists, register at the card issuing node, so that the tourists and the mobile node numbers correspond one by one, and then the mobile node reports information to the card issuing node, and the mobile node is carried by the tourists at the booth. At regular intervals, it actively sends information to the booth node. If the visitor walks to the exit of the room, the mobile node sends information to the card receiving node;

b. The card issuing node or card receiving node directly transmits information to the central processing node, or the booth node transmits information to the central processing node through certain steps;

The steps for the booth node to transmit information to the central processing node are:

b1. After receiving the information of the mobile node, the booth node closest to the visitor judges its signal strength value and signal quality, calculates the location of the mobile node according to a certain signal attenuation model, that is, the location of the visitor, and then reports the information to the transmission node.

b2. The transmission node transmits the information to the central processing node;

c. After the central processing node compares and analyzes the information, it finally determines the location information of the visitor according to the distance from the booth node, and after simple storage, it is transmitted to the management server through a wired method;

d. Query the specific location of visitors, the number of visits to exhibits and other information through the management server.

In the indoor positioning system based on the wireless transmission network of the utility model, the task of the upper management system is to mainly provide detailed introduction of the exhibition area, query of the visitor's visit route, Functions such as positioning in the tourist functional area, statistics of the attention of the exhibition area, query of the current number of visitors in the exhibition area, and display of the network topology.

Claims (3)

1. indoor locating system based on wireless-transmission network, it is characterized in that: it is made up of wireless network and upper management server; Wireless network comprises mobile node, exhibition booth node, transmission node, the central processing node of transmitting wireless signals successively, and central processing node is connected with upper management server by the computer communication interface; Each node all comprises interconnected wireless communication module, central processing unit and memory, power module.

2. the indoor locating system based on wireless-transmission network according to claim 1 is characterized in that: wireless network also comprises hair fastener node and the receipts card node that directly sends wireless signal to central processing node.

3. the indoor locating system based on wireless-transmission network according to claim 1 is characterized in that: each node also all includes the charging circuit that is connected on the power module.

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