CN104680733B

CN104680733B - Device for searching article in a kind of simple type domestic room based on WIFI

Info

Publication number: CN104680733B
Application number: CN201310623394.1A
Authority: CN
Inventors: 徐峥
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-11-30
Filing date: 2013-11-30
Publication date: 2017-10-10
Anticipated expiration: 2033-11-30
Also published as: CN104680733A

Abstract

The present invention provides a kind of hand-held device for searching article of indoor WIFI of family expenses, helps user to be quickly found out the thing of oneself.The present apparatus looks for something equipment by the less hand-held mobile WIFI of a volume and the smaller wireless tag device of one or more volumes is constituted.Hand-held mobile WIFI equipment is WIFI access points, including WIFI transceiver modules, antenna, display module, micro treatment module, sound module, input module etc..Wireless identification tag is that wireless messages point includes micro treatment module, WIFI transceiver modules, antenna, sound module etc..Wireless identification tag is attached to the back side of object, and when user needs to find article, WIFI connections are set up using hand-held WIFI equipment and wireless identification tag.User can specify specific wireless identification tag（To the object in requisition for searching）Send sound.According to the signal intensity of wireless identification tag, handheld device estimates that oneself arrives the distance of wireless identification tag, and is shown on screen, and when user moves, distance change is also be reflected on screen.User is by distance and acoustic information, with regard to that can be quickly found out the thing of oneself.

Description

Device for searching article in a kind of simple type domestic room based on WIFI

Technical field

The application is related to device for searching article in a kind of simple type domestic room based on WIFI.

Background technology

In daily life, we often encounter, and thing is placed on family, but can not remember situation where, such as Car key, wallet, certificate, long-term no data etc..Pass through this WIFI device for searching article, it is intended that people can be helped more The thing of oneself is found soon.WIFI is now widely used for indoor environment, operates mainly in 2.4G and 5G frequencies, wherein 5G Less easily disturbed by other wireless devices.WIFI can also support multiple information points to be linked into an access point simultaneously.

The content of the invention

It is an object of the present invention to provide a kind of hand-held device for searching article of indoor WIFI, helps user to be quickly found out oneself Thing.The present apparatus is looked for something equipment and the smaller wireless mark of one or more volumes by the less hand-held mobile WIFI of a volume Label apparatus is constituted.Wireless identification tag is attached to the back side of object, when user needs to find article, is set using hand-held WIFI Standby and wireless identification tag sets up WIFI connections.User can specify specific wireless identification tag（To the object in requisition for searching）Send sound Sound.According to the signal intensity of wireless identification tag, handheld device substantially estimates that oneself arrives the distance of wireless identification tag, and is shown in screen On, when user moves, distance change is also be reflected on screen.User is by distance and acoustic information, with regard to that can be quickly found out The thing of oneself.

The present apparatus includes the smaller wireless mark of a volume less hand-held mobile WIFI equipment and one or more volumes Label apparatus.Hand-held mobile WIFI equipment is WIFI access points, including WIFI transceiver modules, antenna, display module, microprocessor mould Block, sound module, input module etc..WIFI transceiver modules, antenna is used to launch, and receives WIFI signal；Micro treatment module is used for WIFI signal intensity is analyzed, approximate distance is estimated and reflects onto display screen；Enter key is used for user and sets article and corresponding Wireless identification tag, when finding thing, the wireless identification tag for oneself needing to find is specified by enter key（That is object）.Wireless identification tag is nothing Line information point includes micro treatment module, WIFI transceiver modules, antenna, sound module.WIFI transceiver modules, antenna is used to launch, Receive WIFI signal；Micro treatment module is used to handle the instruction that WIFI access points are sent, and sound module sends sound, and user can be with The position of label is judged according to sound source.

It is an advantage of the invention that WIFI handheld devices, wireless identification tag is more compact, it is easy to which carrying is used, and is particularly suitable for family Use；Wireless identification tag needs certification when connecting handheld device, communication data is by encryption, relatively safety；A set of product can make Multiple wireless identification tags are used, label correspondence multiple objects are adapted to easily forgetful crowd.

Brief description of the drawings

Fig. 1 is the flow chart of apparatus of the present invention embodiment.

Fig. 2 is the product schematic diagram of apparatus of the present invention.

Embodiment

When user is found using equipment, the hand-held equipment of looking for something of WIFI（That is access point）, wireless identification tag（That is information point）With Firm power sends wireless signal.Wireless messages point is added to the services set indications that WAP is issued by certification SSID, packet coded communication each other.User can select the object for needing to find on a handheld device（Post behind Wireless identification tag）, allow this wireless identification tag to send lasting sound, untill finding.

WAP counts access SSID wireless messages point simultaneously, is received by the unique MAC Address record of other side Wireless signal strength, estimation distance each other, and being shown on screen.Algorithm is as follows：

Signal is sent in information point, when access point receives signal, it is known that the constant emission power of information point, antenna increases Benefit；The receiving power day of access point, line gain, we can calculate and obtain space attenuation：

Free space path Loss=| Transmit Signal (information point Tx）+Gain（Information point antenna）+Gain （Access point antenna）- Received signal (access points）|

Obtain after space attenuation, it is known that WIFI frequency（2.4G or 5G）, the equation decayed using the exterior space, calculation The distance gone out between the two：

Loss（dB)=20log(d)+20log(f)-27.55

d=10^{[Loss+27.55-20log(f)]/20]}

Loss in formula is exactly space attenuation, and linear module is dB；D is access point and information point distance, and linear module is m；F is the frequency 2.4G or 5G that WIF is used, and linear module is MHz；Gain is antenna gain, and unit is dB, Transmit Signal is the signal intensity that information point is sent, and unit is dB, and Received Signal are the signal intensities that access point is received, Unit is dB.

It is worth noting that, this algorithm is primarily adapted for use in the few ecotopia of disturbing factor.Indoor disturbing factor is more, especially It is concrete, and fragment of brick, metal frame can cause the substantial amounts of decay of signal, refraction etc..It is possible to label just within 2 meters, still In other room, the central signal for just every wall, causing hand-held equipment of looking for something to receive it is very weak even without.In handheld device In can preset, if signal attenuation is too big or without signal, screen can point out user to look for object may be in other room Between, user can arrive in other rooms and find.

User knows hand-hold wireless access point apparatus to the approximate distance of wireless tag information point from screen.User moves When, distance change is also be reflected on screen.User can be by apart from the whole position of oneself of harmony tone, being eventually found thing Body and wireless identification tag.

Claims

1. a kind of device for searching article in simple type domestic room based on WIFI, it is characterised in that the simple type domestic room based on WIFI Interior device for searching article includes：

The hand-held mobile WIFI of small volume looks for something equipment i.e. WIFI access points, and hand-held mobile WIFI equipment of looking for something includes WIFI transceiver modules, antenna, display module, micro treatment module, sound module, input module：WIFI transceiver modules, antenna is used for Transmitting, receives WIFI signal；Micro treatment module is used to handle the instruction of user's enter key, analyzes WIFI signal intensity, estimation access The distance between point and information point, and be shown on display screen, after user's movement, distance change is shown on screen, user It may determine that oneself distance from object；Enter key is used for user and sets article and corresponding wireless identification tag, when finding thing, User specifies the wireless identification tag (i.e. object) for oneself needing to find by enter key；

One or more 802.11 wireless identification tags are WIFI information points, and wireless identification tag is attached to the back side of object, wireless identification tag Include micro treatment module, WIFI transceiver modules, antenna, sound module：WIFI transceiver modules, antenna is used to launch, and receives WIFI Signal；Micro treatment module is used for the instruction for handling the searching label that WIFI access points are sent, and sound module is sent lasting sound Sound, causes the attention of user, and user can judge the approximate location of label and object according to sound source；

The hand-held equipment i.e. WAPs of looking for something of WIFI, wireless identification tag is wireless messages point, sends wireless communication with firm power Number, wireless messages point is added to the services set indications SSID that WAP is issued, packet each other by certification Coded communication, WAP counts access SSID wireless messages point simultaneously, is received by the unique MAC Address record of other side Wireless signal strength, estimation distance each other, and being shown on screen；Algorithm is as follows：Signal is sent in information point, is connect When access point receives signal, it is known that the constant emission power of information point, antenna gain；The receiving power of access point, antenna increases Benefit, we can calculate and obtain space attenuation：

Free space path Loss=| Transmit Signal (information point Tx)+Gain (information point antenna)+Gain (connects Access point antenna)-Received signal (access point) |

Obtain after space attenuation, it is known that WIFI frequency (2.4G or 5G), the equation decayed using the exterior space calculates two The distance between person：

Loss (dB)=20log (d)+20log (f) -27.55

D=10^ [Loss+27.55-20log (f)]/20] }

Loss in formula is exactly space attenuation, and linear module is dB；D is access point and information point distance, and linear module is m；F is Frequency 2.4G or 5G that WIF is used, linear module is MHz；Gain is antenna gain, and unit is dB, Transmit Signal It is the signal intensity that information point is sent, unit is dB, and Received Signal are the signal intensities that access point is received, and unit is dB。