CN210536956U

CN210536956U - WiFi terminal direction-finding device based on double antennas

Info

Publication number: CN210536956U
Application number: CN201922274477.XU
Authority: CN
Inventors: 王辉; 王毅宏; 廖宁; 林山; 郑汉军; 许光锋; 闫浩
Original assignee: Xiamen Anscen Network Technology Co ltd
Current assignee: Xiamen Anscen Network Technology Co ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-05-15
Anticipated expiration: 2029-12-17

Abstract

The utility model discloses a wiFi terminal direction-finding device based on dual antenna, put, first wiFi receiving module, second wiFi receiving module, signal processing module, wireless communication module, power module and mobile terminal management module including first wiFi antenna of qxcomm technology, first wave filter, first low noise. The utility model discloses a two antennas realize the quick location to wiFi terminal, and the equipment volume is less simultaneously, convenient to carry, and the location is accurate, is favorable to the large tracts of land to be promoted.

Description

WiFi terminal direction-finding device based on double antennas

Technical Field

This patent relates to the wireless network field, especially relates to a wiFi terminal direction-finding device based on two antennas.

Background

With the progress of science and technology, electronic devices around people are increasing day by day, wherein Wifi devices have huge use amount due to the special function of the Wifi devices in the field of wireless communication. In various environments such as shopping malls, cells, outdoors and the like, WiFi devices are almost ubiquitous, and therefore in some specific cases, workers may need to perform direction finding on known or unknown WiFi hotspots and terminal devices.

The existing WiFi direction-finding positioning method mainly adopts a triangulation positioning method, a triangular array is formed by direction-finding reference points at 3 different positions, and the intensity or the arrival time of a WiFi hotspot is measured at the same time. The system of the device is too complex, and the difficulty of the matching of the subsystems and the data processing is high. Another common technique is single-point approximation positioning, which generally measures the intensity value of a WiFi hotspot through a 360-degree rotatable directional antenna, and performs positioning in cooperation with a certain optimization algorithm. The technical advantage is that the device only needs one antenna, is simple and reliable in design and production, but has larger volume of the directional antenna, high design difficulty and low direction-finding angle resolution under some special scenes, and more depending on experience in actual operation is used for positioning detection.

Therefore, it is very necessary to design a WiFi terminal direction-finding device that is simple and small, convenient to use, and accurate in positioning.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems of complex equipment, overlarge volume, inconvenient use and the like existing when the WiFi terminal direction-finding device is used, the utility model provides a WiFi terminal direction-finding device based on double antennas, which comprises a first omnidirectional WiFi antenna, a first filter, a first low-noise amplifier, a first WiFi receiving module, a second omnidirectional WiFi antenna, a second filter, a second low-noise amplifier, a second WiFi receiving module, a signal processing module, a wireless communication module, a power supply module and a mobile terminal management module, wherein the first omnidirectional WiFi antenna, the first filter, the first low-noise amplifier and the first WiFi receiving module are sequentially connected, the second omnidirectional antenna, the second filter, the second low-noise amplifier and the second WiFi receiving module are sequentially connected, the first WiFi receiving module and the second WiFi receiving module are respectively connected with the signal processing module, the signal processing module is respectively connected with the power supply module and the wireless communication module, the wireless communication module is connected with the mobile terminal management module.

Preferably, the interval between the first omnidirectional WiFi antenna and the second omnidirectional WiFi antenna is 5-6cm, so that the influence of clutter can be reduced, and the anti-interference capability is improved.

Preferably, the wireless communication module includes one or more of bluetooth communication, infrared communication and WiFi communication, which is beneficial to adapting to wireless transmission in different environments.

Preferably, the mobile terminal management module comprises one of a mobile phone, a tablet and a computer, and is used for displaying real-time data of the WiFi terminal direction-finding device.

Preferably, the signal processing module is configured to analyze and restore the received WiFi signal, and extract information such as names and signal strengths of all WiFi terminals in the current environment.

Preferably, the lengths of the radio frequency coaxial lines between the first omnidirectional WiFi antenna and the second omnidirectional WiFi antenna and between the first WiFi receiving module and the second WiFi receiving module are the same.

The utility model provides a modified wiFi terminal direction-finding device based on dual antenna, put, first wiFi receiving module, second wiFi receiving module, signal processing module, wireless communication module, power module and mobile terminal management module including first wiFi antenna of qxcomm technology, first wave filter, first low noise. The utility model discloses a two antennas realize the quick location to wiFi terminal, and the equipment volume is less simultaneously, convenient to carry, and the location is accurate, is favorable to the large tracts of land to be promoted.

Drawings

The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments and together with the description serve to explain the principles of the invention. Other embodiments and many of the intended advantages of embodiments will be readily appreciated as they become better understood by reference to the following detailed description. The elements of the drawings are not necessarily to scale relative to each other. Like reference numerals designate corresponding similar parts.

Fig. 1 is a circuit structure diagram of the WiFi terminal direction-finding device based on dual antenna of the present invention;

fig. 2 is the utility model discloses a wiFi terminal direction-finding device's whole structure chart based on dual antenna.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention.

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In this embodiment, as shown in fig. 1, the utility model discloses a WiFi terminal direction-finding device based on dual antenna includes that first qxcomm technology WiFi antenna 1, first wave filter 2, first low noise put 3, first WiFi receiving module 4, second qxcomm technology WiFi antenna 5, second wave filter 6, second low noise put 7, second WiFi receiving module 8, signal processing module 9, wireless communication module 10, power module 11 and mobile terminal management module 12. Before the device is used, the first WiFi receiving module 4 and the second WiFi receiving module 8 are calibrated, signals with the same time sequence are generated at the two antenna interfaces through a standard signal generator, signal arrival time is respectively recorded by methods of discriminating phases of waveforms and the like, the arrival time is automatically calibrated by comparing difference values, and high-precision phase synchronization and calibration are guaranteed.

After the WiFi terminal direction-finding device is started, the WiFi terminal 13 to be tested sends signals to the first omnidirectional WiFi antenna 1 and the second omnidirectional WiFi antenna 5, the two antennas are the same in length and are vertically arranged on the outer side of the device, the interval does not exceed half of the wavelength, namely, L is C/2 f, the influence of noise waves is favorably reduced, the anti-interference capability is improved, meanwhile, the WiFi terminal direction-finding device is used as a horizontal base line, a horizontal vertical line of the WiFi terminal direction-finding device is used as a normal line, the distance between the two omnidirectional WiFi antennas is L, the included angle between the normal line and a WiFi hotspot is α, the distance difference between the WiFi terminal to be tested and the two antennas is L sin α, the phase difference between the two antennas is-2 pi L sin α f/C, wherein f is 2.4G, C is the speed of light, the time difference of arrival of the phase difference △ t is t2-t1, the WiFi terminal direction-finding device and the WiFi terminal 13 to be obtained by comparing, the time difference t is t, the time difference △ t is t2-t 2, the same, the WiFi terminal to be preferably, the WiFi terminal to be processed, the WiFi terminal to be processed by the WiFi terminal, the WiFi terminal to be processed by the WiFi terminal 13, the WiFi terminal to be processed by the WiFi terminal to be.

The utility model provides a modified wiFi terminal direction-finding device based on dual antenna, put 3, first wiFi receiving module 4, second wiFi of qxcomm technology antenna 5, second wave filter 6, second low noise including first wiFi antenna of qxcomm technology 1, first wave filter 2, first low noise and put 7, second wiFi receiving module 8, signal processing module 9, wireless communication module 10, power module 11 and mobile terminal management module 12. The utility model discloses a two antennas realize the quick location to wiFi terminal, and the equipment volume is less simultaneously, convenient to carry, and the location is accurate, is favorable to the large tracts of land to be promoted.

It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit and scope of the invention. In this way, if these modifications and changes are within the scope of the claims of the present invention and their equivalents, the present invention is also intended to cover these modifications and changes. The word "comprising" does not exclude the presence of other elements or steps than those listed in a claim. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. Any reference signs in the claims shall not be construed as limiting the scope.

Claims

1. A WiFi terminal direction-finding device based on double antennas is characterized by comprising a first omnidirectional WiFi antenna, a first filter, a first low-noise amplifier, a first WiFi receiving module, a second omnidirectional WiFi antenna, a second filter, a second low-noise amplifier, a second WiFi receiving module, a signal processing module, a wireless communication module, a power supply module and a mobile terminal management module, the first omnidirectional WiFi antenna, the first filter, the first low-noise amplifier and the first WiFi receiving module are connected in sequence, the second omnidirectional WiFi antenna, the second filter, the second low-noise amplifier and the second WiFi receiving module are connected in sequence, the first WiFi receiving module and the second WiFi receiving module are respectively connected with the signal processing module, the signal processing module is respectively connected with the power supply module and the wireless communication module, and the wireless communication module is connected with the mobile terminal management module.

2. The WiFi terminal direction-finding device of claim 1, wherein the first omni-directional WiFi antenna and the second omni-directional WiFi antenna are spaced apart by 5-6 cm.

3. The WiFi terminal direction-finding device of claim 1, wherein the wireless communication module comprises one or more combination of bluetooth communication, infrared communication and WiFi communication.

4. The WiFi terminal direction-finding device of claim 1, wherein the mobile terminal management module comprises one of a mobile phone, a tablet and a computer, and is used for displaying real-time data of the WiFi terminal direction-finding device.

5. The WiFi terminal direction-finding device of claim 1, wherein the signal processing module is configured to analyze and recover the received WiFi signal.

6. The WiFi terminal direction-finding device of claim 1, wherein the lengths of the rf coaxial lines between the first omni-directional WiFi antenna and the first WiFi receiving module and between the second omni-directional WiFi antenna and the second WiFi receiving module are the same.