CN106960557A - A kind of multiple antennas automatic switching control equipment and method based on RSSI - Google Patents
A kind of multiple antennas automatic switching control equipment and method based on RSSI Download PDFInfo
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- CN106960557A CN106960557A CN201710097276.XA CN201710097276A CN106960557A CN 106960557 A CN106960557 A CN 106960557A CN 201710097276 A CN201710097276 A CN 201710097276A CN 106960557 A CN106960557 A CN 106960557A
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- rssi
- radio frequency
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention discloses a kind of multiple antennas automatic switching control equipment based on RSSI and method, including 1 wireless radio frequency modules, 8 SMA antennal interfaces, 7 relays and accessory power supply and control switching circuit.8 SMA antennal interfaces, it is 65 degree of directional aerial to be respectively connected to 1 wireless radio frequency modules, 1 omnidirectional antenna and 6 launch angles.Relay, accessory power supply and control switching circuit are used for the self adaptation switch operating for realizing multiple antennas.The present invention realizes that adaptive multi-antenna switches by the detection to RSSI and packet loss, can effectively improve cyberspace reusability, increase network's coverage area and save energy ezpenditure etc..Solve large area monitoring system (such as large area rice terrace) because environmental disturbances cause monitoring system packet loss high, information gathering poor real greatly the problems such as.
Description
Technical field
The present invention relates to based on hybrid antenna wireless sensor networking, and in particular to a kind of multiple antennas based on RSSI
Automatic switching control equipment and method.
Background technology
Wireless sensor network (WSN) is used as one of key technology of Internet of Things.The extensive of domestic and foreign scholars is caused
Concern, it is one of current study hotspot that WSN technology is applied into environmental monitoring and ecological Studies.WSN has self-organizing, low work(
The features such as consumption, high reliability, wireless sensor network is combined with farmland parameter sensors, a wide range of, multiple spot agriculture can be achieved
The on-line real time monitoring of field parameter, has important to accelerating the agricultural production level of informatization, the quality of raising crops and yield
Meaning.
Agricultural monitoring system based on wireless sensor network is general to be supervised by sensor node, aggregation node and telecommunication network
Survey terminal composition.The ambient parameter that each sensor node of specified monitored area is responsible for monitoring needed for gathering is distributed in, it is such as empty
After temperature and moisture, intensity of illumination, gas concentration lwevel, soil moisture water gradation parameter, aggregation node is sent to.Saved again by convergence
Point is uploaded to remote server by GPRS module.And sensor node and aggregation node are received and the ability of forwarding packet is removed
Beyond relevant with selected wireless radio frequency modules, the antenna that its wireless radio frequency modules is carried also is be unable to do without.
Major part Wireless Sensor Network Routing Protocol is all based on omnidirectional antenna technology at present, in recent years, wireless
Also gradually it is concerned using the research of directional aerial in sensor network.Compared with omnidirectional antenna, directional aerial, which has, improves net
The advantages of network spatial multiplex ratio, increase network's coverage area, saving energy ezpenditure.
The content of the invention
In view of the shortcomings of the prior art, it is based on RSSI's (received signal strength indicator) it is an object of the invention to provide a kind of
Multiple antennas automatic switching control equipment and method, by the detection to RSSI and packet loss, realize that adaptive antenna switches.
To achieve the above object, a kind of technical scheme of the multiple antennas automatic switching control equipment based on RSSI of the present invention is：Bag
Include 1 wireless radio frequency modules, 8 SMA antennal interfaces, 7 relays, accessory power supplys and control switching circuit.
The device includes 1 wireless radio frequency modules, 8 SMA antennal interfaces and 7 relays.Wireless radio frequency modules antenna
The common port of interface and No. 1 relay is together connected to No. 1 SMA antennal interface.No. 1 relay normally-closed contact is connected to No. 2 SMA
Antennal interface simultaneously accesses omnidirectional antenna.Remaining 2-7 relays normally-closed contact is sequentially connected 3-7 SMA antennal interfaces simultaneously respectively
Access the directional aerial that launch angle is 65 degree.No. 1 relay normally open contact is connected to No. 2 relay common ports.No. 2 relays
Normally opened contact is connected to No. 3 relay common ports.No. 3 relay normally open contacts are connected to No. 4 relay common ports.No. 4 relays
Device normally opened contact is connected to No. 5 relay common ports.No. 5 relay normally open contacts are connected to No. 6 relay common ports.No. 6 after
Electrical equipment normally opened contact is connected to No. 7 relay common ports.No. 7 relay normally open contacts are connected to No. 8 SMA antennal interfaces.
In 8 SMA antennal interfaces, No. 1 SMA antennal interface connects wireless radio frequency modules antennal interface.No. 2 SMA antennas
Interface connects omnidirectional antenna.Remaining 3-8 SMA antennal interface connects the directional aerial that launch angle is 65 degree.
In addition it is of the invention, also including a kind of multiple antennas automatic switching method based on RSSI, comprise the following steps：
A, to wireless radio frequency modules carry out initialization basic configuration；
B, setting radio-frequency module transmission power are minimum；
C, switching radio-frequency module antenna are omnidirectional antenna；
Whether d, the RSSI value for obtaining and judging radio-frequency module are more than set threshold value；
If RSSI value is more than set threshold value in e, step d, into normal transceiver mode, this wheel work is completed.Otherwise open
Begin switched directional antennae, and return to step d in turn；If after the complete all directional aerials of poll, RSSI value still be not up to threshold value, then without
Line radio-frequency module increases one-level transmission power.And return to step d.
The present invention compared with prior art, has the following advantages that and beneficial effect：
(1) reasonable in design, strong applicability of the invention, by the way of electric-controlled type self adaptation switching antenna.Make to be based on the dress
The wireless sensor networking performance put is more excellent.
(2) present invention can increase network's coverage area, and then increase monitoring area.
(3) relay uses photoelectrical coupler in inputting and exporting internal circuit, it is to avoid output end is to prime control
The influence of circuit；
(4) circuit PMOS is controlled in device, power consumption is lower.
(5) circuit is controlled to be powered using direct current 5V in device, low-voltage power supply can ensure that the safety of operator.
Brief description of the drawings
Fig. 1 is the present invention a kind of multiple antennas automatic switching control equipment and method structural representation based on RSSI；
Fig. 2 is principle of the invention figure；
Fig. 3 is inventive antenna switch operating flow chart；
Embodiment
With reference to embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not
It is limited to this.
As shown in figure 1, the present apparatus includes 1 wireless radio frequency modules, 8 SMA antennal interfaces, 7 relays, auxiliary electricity
Source and control switching circuit.Antenna can be switched according to the RSSI value self adaptation of radio-frequency module.Wireless radio frequency modules antennal interface and
The common port of No. 1 relay is together connected to No. 1 SMA antennal interface.No. 1 relay normally-closed contact is connected to No. 2 SMA antennas and connect
Mouth simultaneously accesses omnidirectional antenna.Remaining 2-7 relays normally-closed contact is sequentially connected 3-7 SMA antennal interfaces and accessed respectively to be covered
Lid scope is 65 degree of directional aerial.No. 1 relay normally open contact is connected to No. 2 relay common ports.No. 2 relay normally opens are touched
Point is connected to No. 3 relay common ports.No. 3 relay normally open contacts are connected to No. 4 relay common ports.No. 4 relay normally opens
Contact portion is to No. 5 relay common ports.No. 5 relay normally open contacts are connected to No. 6 relay common ports.No. 6 relays are normal
Contact portion is opened to No. 7 relay common ports.No. 7 relay normally open contacts are connected to No. 8 SMA antennal interfaces.
On the other hand, the present invention also provides a kind of multiple antennas automatic switching method based on RSSI, comprises the following steps：
A, to wireless radio frequency modules carry out initialization basic configuration；
B, setting radio-frequency module transmission power are minimum；
C, switching radio-frequency module antenna are omnidirectional antenna；
Whether d, the RSSI value for obtaining and judging radio-frequency module are more than set threshold value；
If RSSI value is more than set threshold value in e, step d, into normal transceiver mode, this wheel work is completed.Otherwise open
Begin switched directional antennae, and return to step d in turn；If after the complete all directional aerials of poll, RSSI value still be not up to threshold value, then without
Line radio-frequency module increases one-level transmission power.And return to step d.
Above-described embodiment is preferably embodiment, but embodiments of the present invention are not by above-described embodiment of the invention
Limitation, other any Spirit Essences without departing from the present invention and the change made under principle, modification, replacement, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (6)
1. a kind of multiple antennas automatic switching control equipment based on RSSI, it is characterised in that described device includes 1 less radio-frequency mould
Block, 8 SMA antennal interfaces, 7 relays, 6 directional aerials, 1 omnidirectional antenna, accessory power supplys and control switching circuit, institute
Stating control switching circuit controls the relay switching wireless radio frequency modules to connect by one of described 8 SMA antennal interfaces
It is connected to a directional aerial or the omnidirectional antenna.
2. a kind of multiple antennas automatic switching control equipment based on RSSI according to claim 1, it is characterised in that：8 SMA
In antennal interface, No. 1 SMA antennal interface connects wireless radio frequency modules antennal interface；No. 2 SMA antennal interfaces connect the omnidirectional antenna；
Remaining 3-8 SMA antennal interface connects six directional aerials that launch angle is 65 degree.
3. a kind of multiple antennas automatic switching control equipment based on RSSI according to claim 2, it is characterised in that：Described device is also
Including a wireless radio frequency modules antennal interface, also, the common port of the wireless radio frequency modules antennal interface and No. 1 relay
Together it is connected to No. 1 SMA antennal interface；No. 1 relay normally-closed contact is connected to No. 2 SMA antennal interfaces and accesses omnidirectional antenna；
Remaining 2-7 relays normally-closed contact is sequentially connected 2-7 SMA antennal interfaces and accesses the orientation that launch angle is 65 degree respectively
Antenna；No. 1 relay normally open contact is connected to No. 2 relay common ports；No. 2 relay normally open contacts are connected to No. 3 relays
Common port；No. 3 relay normally open contacts are connected to No. 4 relay common ports；No. 4 relay normally open contacts are connected to No. 5 relays
Device common port；No. 5 relay normally open contacts are connected to No. 6 relay common ports；No. 6 relay normally open contacts be connected to No. 7 after
Electrical equipment common port；No. 7 relay normally open contacts are connected to No. 8 SMA antennal interfaces.
4. a kind of multiple antennas automatic switching control equipment based on RSSI according to claim 3, it is characterised in that：The device according to
The RSSI value of radio-frequency module switches antenna by the relay.
5. a kind of multiple antennas automatic switching control equipment based on RSSI according to claim 1, it is characterised in that：The auxiliary electricity
Source is electrically the direct current 5V power supplys after transformation, rectification, filtering, voltage stabilizing.
6. a kind of multiple antennas automatic switching method based on RSSI, the multiple antennas that it is used for described in one of claim 1-5 is automatic
Switching device, it is characterised in that comprise the following steps：
A, wireless radio frequency modules are initialized；
B, setting wireless radio frequency modules transmission power are minimum；
The antenna that c, switching are connected to wireless radio frequency modules is the omnidirectional antenna；
Whether d, the RSSI value for obtaining and judging wireless radio frequency modules are more than set threshold value；
If RSSI value is more than set threshold value in e, step d, into normal transceiver mode, this wheel work is completed；Otherwise wheel is started
Stream switching is connected to the antenna of wireless radio frequency modules for directional aerial 1-6, and return to step d；If the complete all directional aerials of poll
Afterwards, the RSSI value is still not up to the threshold value, then wireless radio frequency modules increase one-level transmission power, and return to step c.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710097276.XA CN106960557A (en) | 2017-02-22 | 2017-02-22 | A kind of multiple antennas automatic switching control equipment and method based on RSSI |
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| CN201710097276.XA CN106960557A (en) | 2017-02-22 | 2017-02-22 | A kind of multiple antennas automatic switching control equipment and method based on RSSI |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108365883A (en) * | 2018-05-17 | 2018-08-03 | 郑州天点科技有限公司 | A kind of adjustable network device based on omnidirectional antenna and directional aerial |
| CN108462543A (en) * | 2018-01-31 | 2018-08-28 | 厦门致联科技有限公司 | A kind of control method of underground communication device |
| TWI662803B (en) * | 2018-05-28 | 2019-06-11 | 華碩電腦股份有限公司 | Antenna system and resetting method therefor |
| WO2019173983A1 (en) * | 2018-03-14 | 2019-09-19 | Nokia Shanghai Bell Co., Ltd. | Methods, devices and computer readable medium for transmission scheme |
| CN111337554A (en) * | 2020-03-13 | 2020-06-26 | 山东航向电子科技有限公司 | Multi-mode compatible GNSS-R soil humidity microwave remote sensing device and using method thereof |
| US10750518B2 (en) | 2018-05-28 | 2020-08-18 | Asustek Computer Inc. | Antenna system and restarting method thereof |
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| CN205726076U (en) * | 2016-06-27 | 2016-11-23 | 深圳市飞鲨电子有限公司 | A kind of video reception circuit of wireless video eyeglass |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108462543A (en) * | 2018-01-31 | 2018-08-28 | 厦门致联科技有限公司 | A kind of control method of underground communication device |
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| WO2019173983A1 (en) * | 2018-03-14 | 2019-09-19 | Nokia Shanghai Bell Co., Ltd. | Methods, devices and computer readable medium for transmission scheme |
| US11490340B2 (en) | 2018-03-14 | 2022-11-01 | Nokia Solutions And Networks Oy | Setting directional or non-directional antenna mode based on transmission power |
| CN108365883A (en) * | 2018-05-17 | 2018-08-03 | 郑州天点科技有限公司 | A kind of adjustable network device based on omnidirectional antenna and directional aerial |
| TWI662803B (en) * | 2018-05-28 | 2019-06-11 | 華碩電腦股份有限公司 | Antenna system and resetting method therefor |
| US10750518B2 (en) | 2018-05-28 | 2020-08-18 | Asustek Computer Inc. | Antenna system and restarting method thereof |
| CN111337554A (en) * | 2020-03-13 | 2020-06-26 | 山东航向电子科技有限公司 | Multi-mode compatible GNSS-R soil humidity microwave remote sensing device and using method thereof |
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Application publication date: 20170718 |