CN105743530B - Intelligent electronic guide system based on wireless sensor network and method - Google Patents
Intelligent electronic guide system based on wireless sensor network and method Download PDFInfo
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- CN105743530B CN105743530B CN201610237622.5A CN201610237622A CN105743530B CN 105743530 B CN105743530 B CN 105743530B CN 201610237622 A CN201610237622 A CN 201610237622A CN 105743530 B CN105743530 B CN 105743530B
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3827—Portable transceivers
- H04B1/385—Transceivers carried on the body, e.g. in helmets
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/401—Circuits for selecting or indicating operating mode
Abstract
A kind of intelligent electronic guide system and method based on wireless sensor network, including two parts of host and slave, wherein host are supplied to tour guide to use, and slave is supplied to tourist to use；Host is made of microprocessor, wireless digital RF receiving and transmission module, FM FM transmissions module, display alarm module, Keysheet module and MCI；Slave is made of microprocessor, wireless digital RF receiving and transmission module, FM FM receptions module, display alarm module, Keysheet module and earplug.Host is often mounted in box body.And it is avoided in the prior art in conjunction with its method so that safeguarding framework that is highly difficult, damaging pedestal, causing the cumbersome defect decomposed；It is not necessary to be intended to same background terminal request when needing audible communication permit that audible communication can be carried out, can thus improve the efficiency of transmission of transmission line, and allow tour guide that can obtain corresponding reaction in time after obtaining host.
Description
Technical field
The invention belongs to electronic guide technical fields, and in particular to a kind of smart electronics based on wireless sensor network are led
Swim system and method.
Background technology
Intelligent electronic guide system includes two parts of host and slave, and wherein host is supplied to tour guide to use, and slave carries
Tourist is supplied to use, complete intelligent visitor management, wireless speech explanation and commentary standardization.Host is by microprocessor, nothing
Line number word RF receiving and transmission module, FM FM transmissions module, display alarm module, Keysheet module and MCI compositions；Slave is by micro-
Manage device, wireless digital RF receiving and transmission module, FM FM receptions module, display alarm module, Keysheet module and earplug composition.
The explanation of tour guide inputs FM FM transmission modules after the MCI of host acquisitions, then launches；The frequency modulation of slave
Receiving module receives FM signals, is output to earplug.Record has the CD, recorder or MP3 of standard commentary can be defeated by standard interface
Enter to host, is emitted by the FM FM transmission modules of host, realize the standardization of commentary.And the FM FM transmissions of slave
The network of module and receiving module composition is that wireless speech explains network.Host is often mounted in box body.
And pedestal is very universal support device, tour guide is often coupled the box body to allow host to carry out via pedestal
The application of setting position, such box body, which can be played preferably, avoids particulate contaminant from involving in space residing for host, and another party
Face sets up box body to after on pedestal, and finger is extended to maintenance of the execution to host in box body toward contact, however existing box
Body framework is often very big to the limitation of the scope of activities of finger so that maintenance is highly difficult, in addition because box body is finishing operation
Assembly, with pedestal connection must connecting piece as binding rivet, the unavoidable framework that must damage pedestal can also make
At the cumbersome of decomposition.
In addition a fairly large number of in guides so far, several tour guides need to carry out audio friendship in real time
Stream thus needs to combine the input FM FM transmission modules after the MCI of host acquisitions, then launches, thus can be real
Now audible communication is carried out for tour guide's audio-frequency information for being acquired of scene, however the need of the audible communication along with several tour guides
The increase asked will often be interfered with each other, cannot be recognized at all once carrying out audible communication with a large amount of tour guide's real-time synchronizations occur
The audio specifically conducted a sightseeing tour so that audible communication cannot achieve.
In order to solve this problem, tour guide is allowed for by the way that the MCI acquisitions of host are used alone to carry out audible communication, is led
The problem that the service efficiency that the MCI of host is acquired is not high is caused, although in order to solve this problem, being also proposed background terminal
Sending and receiving for operating audio signal is carried out, is often allowed in this way so that the semaphore increase transmitted, influences transmission line
Efficiency of transmission；In addition because of the lag of transmission line, there may be the distortions of audio signal.
Invention content
It is an object of the invention to provide a kind of intelligent electronic guide system and method based on wireless sensor network, avoids
In the prior art so that safeguarding framework that is highly difficult, damaging pedestal, causing the cumbersome defect decomposed；Just additionally by the invention
It can identify that tour guide inputs FM FM transmission modules after the MCI acquisition audio-frequency informations that the time can use host in time, so
After launch carry out audible communication so that It is not necessary to which being intended to that the request of same background terminal permits when needing audible communication can not
Audible communication can be carried out, the efficiency of transmission of transmission line can be thus improved, and allows tour guide can be timely after obtaining host
Obtain corresponding reaction.
A kind of smart electronics based on wireless sensor network in order to overcome the deficiencies in the prior art, the present invention provides
The solution of guide system and method, it is specific as follows：
A kind of intelligent electronic guide system based on wireless sensor network, including two parts of host and slave, wherein
Host is supplied to tour guide to use, and slave is supplied to tourist to use；Host is by microprocessor, wireless digital RF receiving and transmission module, FM
FM transmission module, display alarm module, Keysheet module and MCI compositions；Slave is by microprocessor, wireless digital radio-frequency receiving-transmitting
Module, FM FM receptions module, display alarm module, Keysheet module and earplug composition；
The microprocessor of the host is the same as wireless digital RF receiving and transmission module, FM FM transmissions module, display alarm module
And Keysheet module is connected, the FM FM transmissions module is connected with MCI；
The same microprocessor of microprocessor of the slave, wireless digital RF receiving and transmission module, FM FM receptions module, display
Alarm module and Keysheet module are connected, and the FM FM receptions module is connected with earplug；
The host is mounted in box, and in addition the box body A3 of the box is cube structure, in addition the box body A3
Lower wall surface and a side wall face on be provided with cavity, the lower wall surface constitutes the first cavity A31 for being coupled strainer, the side wall
Face constitutes the second cavity A32 with outer type, and the position of the second cavity A32 is with the upper wall surface for being opened in the box body A3
The first arch ditch road A311 and be opened in the box body A3 side wall face the second arch ditch road A312；It further include union body
With the first longitudinally disposed strip ditch road A11 and the second strip ditch road A21 being laterally arranged, institute on A6, the union body A6
The periphery for stating lower wall surface is rabbeted in the first strip ditch road A11, and the second strip ditch road A21 interlockings are in pedestal wall surface A4
Periphery A41 or the location hole A42 on pedestal wall surface A4 periphery A43 position；
The microprocessor of the host is also connected with WIFI module, and the WIFI module is the same as the terminal for carrying WIFI function
It is connected.
The method of intelligent electronic guide system based on wireless sensor network is that steps are as follows：
Acquisition module, identification module, manipulation signal constructing module and manipulation module, the acquisition are also run in slave
Module is used for obtaining sending by the background terminal of the audio signal of several operating personnel in handling for power information
If the audio signal of dry passage；If the identification module is used for the sender of the audio signal judgement audio signal by dry passage
Number；The manipulation signal constructing module is used for manipulating letter by sender's number of the audio signal and the critical value construction of setting
Number；The manipulation module is used for manipulating that audio signal can be transmitted；The identification module contains clutter identification submodule and sound
The derivation submodule of sender's number of frequency signal, if described clutter identification submodule be used for the audio signal of pair dry passage into
Row audio clutter identifies；If the derivation submodule of sender's number of the audio signal is used in audio signal being audio number
According to or audio data and audio clutter data set, then sender's number of audio signal be incremented by one；If audio signal
Only clutter data, then sender's number of audio signal remain unchanged；The identification module also screens out son containing clutter
Module, the clutter screen out submodule and are used for screening out audio noise signal；The identification module is also containing audio signal
To locate to identify that submodule, the audio signal are believed to locate to identify submodule for identifying whether audio signal is originated from audio
Number storage unit then screen out and described believe derived from audio if the audio signal is derived from the storage unit of audio signal
Number storage unit audio signal.Further, if the critical value that the manipulation signal constructing module is used for setting is more than
Or equal to the audio signal sender's number when, just construction is used for transmitting the manipulation signal of audio signal；If setting
Critical value be less than the audio signal sender's number when, with regard to construction forbid transmit audio signal manipulation signal；
The audio signal sent in this way by terminal of the acquisition with WIFI function；If by the audio signal of dry passage
Judge sender's number of audio signal；The critical value construction of the sender's number and setting that rely on the audio signal again manipulates letter
Number；By the manipulation signal audio signal can be sent to manipulate；
If the audio signal by dry passage judges that the mode of sender's number of audio signal contains：Execute audio clutter
Identification；If audio signal is the set of audio data or audio data and audio clutter data, the then transmission of audio signal
Square number is incremented by one；If audio signal is only clutter data, then sender's number of audio signal remains unchanged；If described
Audio signal is derived from the storage unit of audio signal, then screens out the audio letter of the storage unit derived from audio signal
Number；
Described relies on the method that sender's number of the audio signal and the critical value of setting construct manipulation signal, tool again
Body is：If the critical value of setting is greater than or equal to sender's number of the audio signal, just construction is used for transmitting sound
The manipulation signal of frequency signal；If the critical value of setting is less than sender's number of the audio signal, construction is forbidden
Transmit the manipulation signal of audio signal.
The service efficiency that can effectively avoid the MCI of host in the prior art from acquiring according to the present invention is not high, transmission
Semaphore increases, influences the efficiency of transmission of transmission line and in addition because of the lag of transmission line, there may be audio signals
The defect of distortion；The first arch ditch road A311 and second that the present invention is carried via the second positions cavity A32 of the box body of box
Arch ditch road A312 can be easy to allow tour guide's finger to enter and execute maintenance in box body, in addition the first arch ditch road A311 and the
The framework of two arch ditch road A312 can also efficiently avoid twinkling effect of the box body to tour guide, in addition via on the union body A6
The the first longitudinally disposed strip ditch road A11 carried and the second strip ditch road A21 being laterally arranged, when being coupled to execution,
The periphery of the lower wall surface is rabbeted in the first strip ditch road A11, and the second strip ditch road A21 interlockings are in pedestal wall surface
The position of the periphery A43 of the periphery A41 or the location hole A42 on pedestal wall surface A4 of A4, because having respectively formed laterally and longitudinally
Two positions connection, allow box body to be securely bound up on pedestal wall surface；To when being decomposed, must only heave out box
Body shuts down union body just via pedestal wall surface, so box body compares current framework, more easily tour guide can be allowed to safeguard
And it realizes and is easier to allow detaching between box body and pedestal wall surface.
Description of the drawings
Fig. 1 is the structure chart of the intelligent electronic guide system based on wireless sensor network of the present invention.
Fig. 2 is the side view of hollow cavity.
Fig. 3 is the structural schematic diagram of shell.
Fig. 4 is the side view of Fig. 3.
Fig. 5 is the plan view of Fig. 3.
Fig. 6 is part connection diagram.
Specific implementation mode
Invention content is described further with reference to the accompanying drawings and examples：
Referring to Fig.1 shown in-Fig. 6, the intelligent electronic guide system based on wireless sensor network, including host and slave two
A part, wherein host are supplied to tour guide to use, and slave is supplied to tourist to use, and complete intelligent visitor management, wireless speech solution
It says and the standardization of commentary；Host is accused by microprocessor, wireless digital RF receiving and transmission module, FM FM transmissions module, display
Alert module, Keysheet module and MCI compositions；Slave is by microprocessor, wireless digital RF receiving and transmission module, FM FM reception moulds
Block, display alarm module, Keysheet module and earplug composition；
The microprocessor of the host is the same as wireless digital RF receiving and transmission module, FM FM transmissions module, display alarm module
And Keysheet module is connected, the FM FM transmissions module is connected with MCI；
The same microprocessor of microprocessor of the slave, wireless digital RF receiving and transmission module, FM FM receptions module, display
Alarm module and Keysheet module are connected, and the FM FM receptions module is connected with earplug；
The host is mounted in box, and in addition the box body A3 of the box is cube structure, in addition the box body A3
Lower wall surface and a side wall face on be provided with cavity, the lower wall surface constitutes the first cavity A31 for being coupled strainer, the side wall
Face constitutes the second cavity A32 with outer type, and the position of the second cavity A32 is with the upper wall surface for being opened in the box body A3
The first arch ditch road A311 and be opened in the box body A3 side wall face the second arch ditch road A312；It further include union body
With the first longitudinally disposed strip ditch road A11 and the second strip ditch road A21 being laterally arranged, institute on A6, the union body A6
The periphery for stating lower wall surface is rabbeted in the first strip ditch road A11, and the second strip ditch road A21 interlockings are in pedestal wall surface
The position of the periphery A43 of the periphery A41 or the location hole A42 on pedestal wall surface A4 of A4；
The microprocessor of the host is also connected with WIFI module, and the WIFI module is the same as the terminal for carrying WIFI function
It is connected.
The method of intelligent electronic guide system based on wireless sensor network is that steps are as follows：
Acquisition module, identification module, manipulation signal constructing module and manipulation module, the acquisition are also run in slave
Module is used for obtaining sending by the background terminal of the audio signal of several operating personnel in handling for power information
If the audio signal of dry passage；If the identification module is used for the sender of the audio signal judgement audio signal by dry passage
Number；The manipulation signal constructing module is used for manipulating letter by sender's number of the audio signal and the critical value construction of setting
Number；The manipulation module is used for manipulating that audio signal can be transmitted；The identification module contains clutter identification submodule and sound
The derivation submodule of sender's number of frequency signal, if described clutter identification submodule be used for the audio signal of pair dry passage into
Row audio clutter identifies；If the derivation submodule of sender's number of the audio signal is used in audio signal being audio number
According to or audio data and audio clutter data set, then sender's number of audio signal be incremented by one；If audio signal
Only clutter data, then sender's number of audio signal remain unchanged；The identification module also screens out son containing clutter
Module, the clutter screen out submodule and are used for screening out audio noise signal；The identification module is also containing audio signal
To locate to identify that submodule, the audio signal are believed to locate to identify submodule for identifying whether audio signal is originated from audio
Number storage unit then screen out and described believe derived from audio if the audio signal is derived from the storage unit of audio signal
Number storage unit audio signal.Further, if the critical value that the manipulation signal constructing module is used for setting is more than
Or equal to the audio signal sender's number when, just construction is used for transmitting the manipulation signal of audio signal；If setting
Critical value be less than the audio signal sender's number when, with regard to construction forbid transmit audio signal manipulation signal；
The audio signal sent in this way by terminal of the acquisition with WIFI function；If by the audio signal of dry passage
Judge sender's number of audio signal；The critical value construction of the sender's number and setting that rely on the audio signal again manipulates letter
Number；By the manipulation signal audio signal can be sent to manipulate；
If the audio signal by dry passage judges that the mode of sender's number of audio signal contains：Execute audio clutter
Identification；If audio signal is the set of audio data or audio data and audio clutter data, the then transmission of audio signal
Square number is incremented by one；If audio signal is only clutter data, then sender's number of audio signal remains unchanged；If described
Audio signal is derived from the storage unit of audio signal, then screens out the audio letter of the storage unit derived from audio signal
Number；
Described relies on the method that sender's number of the audio signal and the critical value of setting construct manipulation signal, tool again
Body is：If the critical value of setting is greater than or equal to sender's number of the audio signal, just construction is used for transmitting sound
The manipulation signal of frequency signal；If the critical value of setting is less than sender's number of the audio signal, construction is forbidden
Transmit the manipulation signal of audio signal.
The service efficiency that can effectively avoid the MCI of host in the prior art from acquiring according to the present invention is not high, transmission
Semaphore increases, influences the efficiency of transmission of transmission line and in addition because of the lag of transmission line, there may be audio signals
The defect of distortion；The first arch ditch road A311 and second that the present invention is carried via the second positions cavity A32 of the box body of box
Arch ditch road A312 can be easy to allow tour guide's finger to enter and execute maintenance in box body, in addition the first arch ditch road A311 and the
The framework of two arch ditch road A312 can also efficiently avoid twinkling effect of the box body to tour guide, in addition via on the union body A6
The the first longitudinally disposed strip ditch road A11 carried and the second strip ditch road A21 being laterally arranged, when being coupled to execution,
The periphery of the lower wall surface is rabbeted in the first strip ditch road A11, and the second strip ditch road A21 interlockings are in pedestal wall surface
The position of the periphery A43 of the periphery A41 or the location hole A42 on pedestal wall surface A4 of A4, because having respectively formed laterally and longitudinally
Two positions connection, allow box body to be securely bound up on pedestal wall surface；To when being decomposed, must only heave out box
Body shuts down union body just via pedestal wall surface, so box body compares current framework, more easily tour guide can be allowed to safeguard
And it realizes and is easier to allow detaching between box body and pedestal wall surface.The material of the box body A3 is acrylic material, can be easier
Check the inside state.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this profession
Member, without departing from the scope of the present invention, when the technology contents using the disclosure above make a little change or modification
For the equivalent embodiment of equivalent variations, as long as be without departing from technical solution of the present invention content, according to the technical essence of the invention,
Within the spirit and principles in the present invention, to any simple modification, equivalent replacement and improvement etc. made by above example, still
Belong within the protection domain of technical solution of the present invention.
Claims (2)
1. a kind of intelligent electronic guide system based on wireless sensor network, which is characterized in that including host and slave two
Part, wherein host are supplied to tour guide to use, and slave is supplied to tourist to use；Host is received by microprocessor, wireless digital radio frequency
Send out module, FM FM transmissions module, display alarm module, Keysheet module and MCI compositions；Slave by microprocessor, without line number
Word RF receiving and transmission module, FM FM receptions module, display alarm module, Keysheet module and earplug composition；
The microprocessor of the host with wireless digital RF receiving and transmission module, FM FM transmissions module, display alarm module and
Keysheet module is connected, and the FM FM transmissions module is connected with MCI；
The same microprocessor of microprocessor of the slave, wireless digital RF receiving and transmission module, FM FM receptions module, display alarm
Module and Keysheet module are connected, and the FM FM receptions module is connected with earplug；
The host is mounted in box, and in addition the box body of the box is cube structure, in addition the lower wall surface of the box body
Be provided with cavity on a side wall face, the lower wall surface constitutes the first cavity for being coupled strainer, and the side wall face is constituted with outer
The second cavity that portion is coupled, the position of second cavity with the upper wall surface for being opened in the box body the first arch ditch Lu Yukai
The second arch ditch road in the side wall face of the box body；Further include union body, with longitudinally disposed the on the union body
The periphery on one strip ditch road and the second strip ditch road being laterally arranged, the lower wall surface is rabbeted in the first strip ditch road,
The position on the periphery of location hole of the second strip ditch road interlocking on the periphery of pedestal wall surface A4 or pedestal wall surface；
The microprocessor of the host is also connected with WIFI module, and the WIFI module is connected with the terminal with WIFI function
It connects；
The box body is acrylic material.
2. the method according to intelligent electronic guide system of the claim 1 based on wireless sensor network is, which is characterized in that step
It is rapid as follows：
Acquisition module, identification module, manipulation signal constructing module and manipulation module, the acquisition module are also run in slave
For obtain sent by the background terminal of the audio signal of several operating personnel in being handled for power information it is several
The audio signal in channel；If the identification module is used for sender's number of the audio signal judgement audio signal by dry passage；
The manipulation signal constructing module is used for manipulating letter by sender's number of the audio signal and the critical value construction of setting
Number；The manipulation module is used for manipulating that audio signal can be transmitted；The identification module contains clutter identification submodule and sound
The derivation submodule of sender's number of frequency signal, if described clutter identification submodule be used for the audio signal of pair dry passage into
Row audio clutter identifies；If the derivation submodule of sender's number of the audio signal is used in audio signal being audio number
According to or audio data and audio clutter data set, then sender's number of audio signal be incremented by one；If audio signal
Only clutter data, then sender's number of audio signal remain unchanged；The identification module also screens out son containing clutter
Module, the clutter screen out submodule and are used for screening out audio noise signal；The identification module is also containing audio signal
To locate to identify that submodule, the audio signal are believed to locate to identify submodule for identifying whether audio signal is originated from audio
Number storage unit then screen out and described believe derived from audio if the audio signal is derived from the storage unit of audio signal
Number storage unit audio signal；Further, if the critical value that the manipulation signal constructing module is used for setting is more than
Or equal to the audio signal sender's number when, just construction is used for transmitting the manipulation signal of audio signal；If setting
Critical value be less than the audio signal sender's number when, with regard to construction forbid transmit audio signal manipulation signal；
The audio signal sent in this way by terminal of the acquisition with WIFI function；If the audio signal by dry passage judges
Sender's number of audio signal；The critical value of the sender's number and setting that rely on the audio signal again constructs manipulation signal；
By the manipulation signal audio signal can be sent to manipulate；
If the audio signal by dry passage judges that the mode of sender's number of audio signal contains：Audio clutter is executed to know
Not；If audio signal is the set of audio data or audio data and audio clutter data, then the sender of audio signal
Number is incremented by one；If audio signal is only clutter data, then sender's number of audio signal remains unchanged；If the sound
Frequency source signal then screens out the audio signal of the storage unit derived from audio signal in the storage unit of audio signal；
Described relies on the method that sender's number of the audio signal and the critical value of setting construct manipulation signal again, specifically
For：If the critical value of setting is greater than or equal to sender's number of the audio signal, just construction is used for transmitting audio
The manipulation signal of signal；If the critical value of setting is less than sender's number of the audio signal, forbid passing with regard to construction
The manipulation signal of transfer audio signal.
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| CN201610237622.5A CN105743530B (en) | 2016-04-14 | 2016-04-14 | Intelligent electronic guide system based on wireless sensor network and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610237622.5A CN105743530B (en) | 2016-04-14 | 2016-04-14 | Intelligent electronic guide system based on wireless sensor network and method |
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| CN105743530B true CN105743530B (en) | 2018-09-14 |
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| CN101408815A (en) * | 2007-09-21 | 2009-04-15 | 索尼株式会社 | Input device and electronic apparatus |
| CN202749568U (en) * | 2012-06-01 | 2013-02-20 | 旭丽电子(广州)有限公司 | Plug device and electronic device provided with same |
| CN203277129U (en) * | 2013-05-22 | 2013-11-06 | 乐清市超泰电子有限公司 | Toggle switch |
| CN104536716A (en) * | 2014-11-28 | 2015-04-22 | 张家港市华孚实业有限公司 | Heat preserving assembly for oil-well production |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102014006464A1 (en) * | 2014-05-06 | 2015-11-12 | Mann + Hummel Gmbh | Humidifying device, for example, for a fuel cell |
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2016
- 2016-04-14 CN CN201610237622.5A patent/CN105743530B/en not_active Expired - Fee Related
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|---|---|---|---|---|
| CN101408815A (en) * | 2007-09-21 | 2009-04-15 | 索尼株式会社 | Input device and electronic apparatus |
| CN202749568U (en) * | 2012-06-01 | 2013-02-20 | 旭丽电子(广州)有限公司 | Plug device and electronic device provided with same |
| CN203277129U (en) * | 2013-05-22 | 2013-11-06 | 乐清市超泰电子有限公司 | Toggle switch |
| CN104536716A (en) * | 2014-11-28 | 2015-04-22 | 张家港市华孚实业有限公司 | Heat preserving assembly for oil-well production |
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| 基于无线传感器网络的智能电子导游系统;安文魁;《西安电子科技大学》;20060101;第3.1.2节 * |
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