CN205265682U - Wireless communicator - Google Patents
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- CN205265682U CN205265682U CN201521131367.3U CN201521131367U CN205265682U CN 205265682 U CN205265682 U CN 205265682U CN 201521131367 U CN201521131367 U CN 201521131367U CN 205265682 U CN205265682 U CN 205265682U
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- 238000001228 spectrum Methods 0.000 claims abstract description 27
- 238000012546 transfer Methods 0.000 claims abstract description 13
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- 238000012856 packing Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 abstract description 21
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000035515 penetration Effects 0.000 abstract description 3
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 8
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- 230000005611 electricity Effects 0.000 description 2
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- 238000012544 monitoring process Methods 0.000 description 2
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- QVFWZNCVPCJQOP-UHFFFAOYSA-N chloralodol Chemical compound CC(O)(C)CC(C)OC(O)C(Cl)(Cl)Cl QVFWZNCVPCJQOP-UHFFFAOYSA-N 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
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- 230000007613 environmental effect Effects 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
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Abstract
The utility model provides a wireless communicator relates to the communication technology field. Wireless communicator is including host system, spread spectrum processing module and the radio -frequency antenna of order connection, host system for acquire the packet that the host computer sent, and will target data transfer to spread spectrum processing module in the packet, spread spectrum processing module, be used for with target data encode and spread spectrum to generate target signal, the radio -frequency antenna, be used for with target signal sends to the remote site module. This wireless communicator uses spread spectrum processing module to carry out the spread spectrum processing to the signal through before sending target signal through the radio -frequency antenna, makes the remote site module receive again. After carrying out spread spectrum communication, can improve penetration capacity, communication distance's effect to because the interference killing feature is strong, so it also can correctly be decoded to the signal under the more weak condition of signal, also be exactly the reception sensitivity height, consequently, guaranteed the communication quality that wireless communicator used under the environment of district.
Description
Technical field
The utility model relates to communication technique field, in particular to wireless communicator.
Background technology
In daily life, be unable to do without the consumption to resources such as water, gas and electricity, the water meter in family andGas meter carries out Auto-counting by the water yield and tolerance that family is consumed, while forming a certain sectionThe water energy of Jian Neigai family, gas consumption total amount. Water conservancy company and natural gas companies basisThe difference of the result that the last time checks meter and this result of checking meter is calculated the water in a period of timeEnergy, gas consumption, and then determine charge according to unit price. Current domestic residencePeople's community user counting cost by gas meter mode mainly contain the person of checking meter visit manual check meter, the person of checking meter holdsPOS machine is visited and is checked meter, IC-card table etc. Although IC-card table has solved charging problem preferably,But the unresolved problem of checking meter, a lot of enterprises still have to arrange manually to visit and check meter. The person of checking meterVisit the cycle of checking meter be bimester or many months, need to drop into a large amount of human and material resources, and numberPoor according to real-time, be difficult to according to meter reading data analysis client's consumption Changing Pattern with for reporting the accomplishment of a task or termination of a missionRate. Along with the growth of urban population, the increase of skyscraper, and the increasing of housing vacancy rateGreatly, the workload of checking meter of manually visiting increases day by day, and operation management expense progressively increases, and holds very muchBe prone to Lou and copy, estimate the problem of copying. In addition, resident's privacy consciousness is more and more stronger, copies visitingTable gradually produce conflict, dislike, also making visits check meter more and more difficult. In this backgroundUnder, wireless long-distance meter-reading technology is arisen at the historic moment, and rises just at home.
Wireless Data Transmission is the core content of radio meter register, and its general principle is to have utilized to penetrateFrequently technology. Radio frequency (RadioFrequency) refers to that frequency is higher, can be used for launching nothingThe frequency of line electricity, general normal finger tens is to the frequency range of hundreds of megahertz, i.e. VHF-UHF frequency range.
Because radio communication has without outstanding advantages such as wiring line, mobility are good, wirelessTransfer of data apply to more and more widely community radio meter register, district vehicles monitoring, remote control,Remote measurement, micro radio network, gate control system, community call, industrial data acquisition system,Wireless identification tag, identification, non-contact RF smart card, micro radio data terminal, peaceFull fire prevention system, wireless remote-control system, biological signal collecting, hydrometeorology monitoring, machinePeople controls etc. in field. But radio communication also has outstanding shortcoming: wireless signal aloftDo not carry the baby, can interfere with each other; Wireless signal emission will consume larger electric current etc. For this reason," micropower (short distance) the wireless device management temporary provisions " that China issues for 1998 are rightThe frequency range that product for civilian use radio communication is used and transmitting power have strict restriction, general10mW-50mW, to reduce phase mutual interference, and reduces power consumption. Wherein 400-470MHzThe transmission power limit value of frequency range is 50mW, and other band transmit Power Limitation values are generally lowIn 50mW (except model toy can reach 1W).
The feature of community radio meter register applied environment is that (1) table meter intersperses among baroqueIn residential building, require the communication module of kilowatt meter recorder and table meter to have stronger penetration capacity; (2)Table is counted the dry cell power supply of generally sampling, and electric weight is limited, requires again table meter collector and wirelessModule works in super low-power consumption pattern, i.e. park mode as far as possible.
As shown in Figure 1, wireless communicator is generally by main control unit 11 (optional), wireless numberForm according to processing unit 12 (wireless chip) and radio-frequency antenna 13, can high speed transmission dataSignal, generally all supports transparent transmission pattern, the data former state from external equipment is turnedSend out or receive into.
In concrete application, in residential quarter, have and be much unfavorable for what wireless module usedFactor. As more in shelter (as building, wall, trees etc.), have directly caused signal meetingSignificantly decay; And for example, the interference source existing in residential building is more, has directly caused nothingThe signal that line communicator is sent has been subject to more interference, makes distorted signals. Correlation techniqueIn, technical staff can adopt the mode of setting up repeater to ensure intensity and the letter of wireless signalThe ratio of making an uproar. But, use repeater, must need to configure separately a set of software algorithm, and shouldAlgorithm is comparatively complicated. Meanwhile, owing to having increased repeater, the time delay meeting of communication enters oneStep increases, and once repeater goes wrong, the communication of overall circuit just can be paralysed.
To sum up, in correlation technique, in residential quarter, carry out wireless tabling look-up, in communityThe existence of shelter and interference source, efficiency is difficult to be guaranteed.
Utility model content
The purpose of this utility model is to provide wireless communicator, to improve the logical of radio meter registerLetter ability.
First aspect, the utility model embodiment provide wireless communicator, comprising:
The main control module, spread processing module and the radio-frequency antenna that are linked in sequence;
Main control module, the packet that sends for obtaining host computer, and by packetTarget data is sent to spread processing module;
Spread processing module, for encoding target data and spread spectrum, to generate targetSignal;
Radio-frequency antenna, for being sent to echo signal opposite end module.
In conjunction with first aspect, the utility model embodiment provides the first of first aspect canCan embodiment, wherein, also comprise: be connected to main control module and spread processing module itBetween SPI interface.
In conjunction with first aspect, the utility model embodiment provides the second of first aspect canThe embodiment of energy, wherein, spread processing module comprises:
Be linked in sequence modulation spectrum-spreading unit between radio-frequency antenna and SPI interface, encoder,Packet constructor;
Packet constructor is target data bag for packing target data;
Encoder, for target data bag is encoded, with generating reference signal;
Modulation spectrum-spreading unit, for modulating and spread spectrum with reference to signal, to generate targetSignal.
In conjunction with first aspect, the utility model embodiment provides the third of first aspect canThe embodiment of energy, wherein, spread processing module also comprises:
The demodulation unit, the forward direction that are linked in sequence between radio-frequency antenna and SPI interface entangleWrong unit and the unit of extracting;
Demodulation unit, separates mediation for the spread-spectrum signal that opposite end module is sentDespreading processing;
Forward error correction unit, for will be through demodulation process, and through despreading expansion after treatmentFrequently signal carries out correction process;
The unit of extracting, for the spread-spectrum signal after correction process is resolved, with lifeBecome to receive data.
In conjunction with first aspect, the utility model embodiment provide the 4th kind of first aspect canCan embodiment, wherein, extract between unit and SPI interface, be also connected with first advancedThe first register of removing from mould.
In conjunction with first aspect, the utility model embodiment provide the 5th kind of first aspect canThe embodiment of energy wherein, is also connected with elder generation between packet constructor and SPI interfaceEnter the second register of first removing from mould.
In conjunction with first aspect, the utility model embodiment provide the 6th kind of first aspect canThe embodiment of energy, wherein, is connected by serial line interface with host computer at main control module.
In conjunction with first aspect, the utility model embodiment provide the 7th kind of first aspect canThe embodiment of energy, wherein, main control module comprises: identification circuit and transfer circuit;
Identification circuit, whether the packet sending for identifying host computer, there is targetIdentification code, if exist, controls transfer circuit work;
Transfer circuit, for being sent to spread processing module by the target data of packet.
In conjunction with first aspect, the utility model embodiment provide the 8th kind of first aspect canThe embodiment of energy, wherein, main control module is MCU.
In conjunction with first aspect, the utility model embodiment provide the 9th kind of first aspect canThe embodiment of energy, wherein, spread processing module is Sub-GHz cake core.
The wireless communicator that the utility model embodiment provides, adopts spread processing technology, withOf the prior art in order to reach increase signal transmission distance, and use repeater to carry out transferMode transmit signal and compare, it by having increased spread processing mould in wireless communicatorPiece, makes main control module after having obtained the packet that host computer sends, by packetIn target data (need to send to the data of opposite end module) be sent to spread processing module,Then, spread processing module is encoded target data and spread processing, and then generates orderMark signal, and last, by radio-frequency antenna, echo signal is sent, so that opposite end module energyEnough receive. After carrying out spread spectrum communication, can improve penetration capacity, communication distanceEffect, and because antijamming capability is strong, so it also can in the situation that signal is weakSignal is correctly decoded, and namely receiving sensitivity height, therefore, has ensured radio communicationThe communication quality that device uses under cell environment.
For above-mentioned purpose of the present utility model, feature and advantage can be become apparent,Preferred embodiment cited below particularly, and coordinate appended accompanying drawing, be described in detail below.
Brief description of the drawings
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, below will be to realityExecute the accompanying drawing of required use in example and be briefly described, should be appreciated that the following drawings only showsGo out some embodiment of the present utility model, therefore should not be counted as the restriction to scope,For those of ordinary skill in the art, do not paying under the prerequisite of creative work, alsoCan obtain other relevant accompanying drawings according to these accompanying drawings.
Fig. 1 shows the basic structure of wireless communicator in correlation technique;
Fig. 2 shows the basic knot of the wireless communicator that the utility model embodiment providesStructure;
Fig. 3 shows spread processing in the wireless communicator that the utility model embodiment providesThe structure enlarged drawing of module.
Detailed description of the invention
Below in conjunction with accompanying drawing in the utility model embodiment, in the utility model embodimentTechnical scheme be clearly and completely described, obviously, described embodiment is onlyThe utility model part embodiment, instead of whole embodiment. Conventionally accompanying drawing hereinThe assembly of middle description and the utility model embodiment of illustrating can come with various configurationArrange and design. Therefore, to the embodiment's of the present utility model providing in the accompanying drawingsDescribe in detail and be not intended to limit claimed scope of the present utility model, but only showShow selected embodiment of the present utility model. Based on embodiment of the present utility model, this area skillThe every other embodiment that art personnel obtain under the prerequisite of not making creative work,All belong to the scope of the utility model protection.
Under the environment of existing long-distance meter-reading system, the staff that tables look-up can be by wirelessThe mode of transmitted signal, obtains the data that in man of resident family, collector collects. Wherein,Collector can be counted the water meter in man of resident family, gas meter, and according to the result of countingGenerate corresponding statistics. When the staff that tables look-up need to obtain statistics,Only need to pass through handheld device (wireless communicator) and send instruction to collector, just can makeCollector returns to corresponding statistics. Table look-up staff after knowing statistics,Just can determine that certain resident family should pay according to the content of statistics and corresponding expenses standardExpense, or also statistics directly can be uploaded to the webserver, so that managementPlatform can be known statistics.
But, when the staff that tables look-up uses wireless communicator to send instruction to collector,The command signal that is easy to send is easy to be disturbed by other things in environment. CommonThe interference source being used as shelter and resident. Shelter can cause wireless communicator to sendCommand signal significantly decay, distortion, and finally cause collector getting instructionWhen signal, cannot distinguish the content of command signal; Interference source is (as other signals produceDevice) interfering signal that generates, may produce superposition by and instruction signal, sameCan make command signal distortion, and finally cause collector cannot receive command signal. Similar, in other long-distance meter-reading systems, the part that need to carry out wireless transmission exists this to ask equallyTopic.
To this, in correlation technique, can adopt the mode that repeater is set to ensure that signal can not loseVery. But, using repeater, must need to configure a set of software algorithm separately, and this calculationMethod is comparatively complicated. More, owing to being provided with repeater, communication delay is increased, andAnd in the time that certain repeater breaks down, can make the paralysis of whole piece communication line.
In view of this, the application provides wireless communicator, as shown in Figures 2 and 3, comprising:
The main control module, spread processing module and the radio-frequency antenna that are linked in sequence;
Main control module 102, the packet sending for obtaining host computer 101, and by numberBe sent to spread processing module 103 according to the target data in bag;
Spread processing module 103, for encoding target data and spread spectrum, to generateEcho signal;
Radio-frequency antenna 104, for being sent to echo signal opposite end module 105.
Main control module 102 need to receive the packet that host computer 101 sends, main control module102 normally adopt the mode of serial ports to be connected with host computer 101. Host computer 101 passes throughReceive instruction, or the inner mode that generates instruction produces packet, and then be sent to master controlModule 102. In in packet, have two kinds of forms, one is instruction, and one is data.If instruction is the control instruction that wireless communicator is assigned, main control moduleWhat in 102 packets that receive in judgement, carry is after instruction, can be according in instructionHolding control wireless communicator inside moves. If the content in packet is data,Need these data to be passed to opposite end module 105. As the description in above, directly pass throughRadio-frequency antenna 104 will directly send after data encoding, may cause the content distortion sending.Use repeater to carry out transfer and have too certain drawback.
Therefore, main control module 102 carries data (, number of targets in specified data bagAccording to) time, target data can be sent to spread processing module 103. Spread processing afterwardsModule 103, except encoding in a conventional manner, also needs the signal after codingCarry out spread processing, to increase echo signal place frequency bandwidth. And last, pass through radio frequencyAntenna 104 sends echo signal, so that opposite end module 105 can receive. NeedBright, wireless communicator and opposite end module 105, do not refer in particular to wireless kilowatt meter reading-out system middle fingerOne/mono-fixed kind equipment, can send wireless signal, or, can send simultaneously and connectThe device of receiving wireless signal can be all the wireless communicator that the application provides. Wherein,Main control module 102 is preferably MCU, and spread processing module 103 is preferably SEMTECHThe broadband communication wireless chip based on LoRa modulation technique of the up-to-date issue of company, anti-interferenceProperty is strong, and power consumption is little, the high receiving sensitivity of can realize-148dbm, and ability through walls is strong,Be applicable to the Wireless Data Transmission application under complex environment, spread processing module 103 is chosen asSub-GHz cake core.
It should be noted that, the spread processing module 103 in wireless communicator is believed targetNumber carry out after spread processing, opposite end module 105 is in order to read normally this signal,After receiving echo signal, need to use corresponding despread unit to echo signal placeReason. Certainly the working mechanism that, despread unit is used with spread processing module 103 is relativeAnswer, otherwise, also just cannot reduce to echo signal.
Further, main control module 102 and spread processing module 103 normally connect by physicsMouth/physical transmission line connects. In order to improve and to ensure main control module 102 and spread spectrum placeBetween reason module 103, accuracy and the promptness of transfer of data, can pass through SPI interface 106Be connected between main control module 102 and spread processing module 103. Main control module 102 obtainsTo target data be also by SPI interface 106, be sent to spread processing module 103.
Concrete, as shown in Figure 3, spread processing module 103 comprises:
The modulation spectrum-spreading unit being linked in sequence between radio-frequency antenna 104 and SPI interface 1061035, encoder 1036, packet constructor 1037;
Packet constructor 1037 is target data bag for packing target data;
Encoder 1036, for target data bag is encoded, with generating reference signal;
Modulation spectrum-spreading unit 1035, for modulating and spread spectrum with reference to signal, to generateEcho signal.
Wherein, by modulation spectrum-spreading unit 1035 modulate and spread spectrum after, to obtain be mouldAnalog signal.
Except carry out the frequency bandwidth of adjustment aim signal with spectrum-spreading unit, also need by separatingExpand unit, ensure that wireless communicator can receive and read by the wireless signal of spread spectrum,, spread processing module 103 also comprises:
The demodulation unit being linked in sequence between radio-frequency antenna 104 and SPI interface 1061031, forward error correction unit 1032 and the unit 1033 of extracting;
Demodulation unit 1031, enters for the spread-spectrum signal that opposite end module 105 is sentRow demodulation expands to be processed;
Forward error correction unit 1032, for will be through demodulation process, and after despreading is processedSpread-spectrum signal carry out correction process;
The unit 1033 of extracting, for the spread-spectrum signal after correction process is resolved,Receive data to generate.
Wherein, the working mechanism of demodulation unit 1031 and modulation spectrum-spreading unit 1035 canTo be corresponding, namely in a set of wireless kilowatt meter reading-out system, the specification of spread spectrum and despreadingIdentical. Can simplification system arrange.
Forward error correction unit 1032, can eliminate the error code receiving in signal, and finally logicalCrossing the unit 1033 of extracting parses valid data. It should be noted that the unit of extracting1033 working method should be pre-set, and it extracts the mode of data from signalTo carry out according to set mode.
Further, between unit 1033 and SPI interface 106, be also connected with advanced person extractingThe first register 1034 of first removing from mould. And at packet constructor 1037 and SPI interfaceBetween 106, be also connected with the second register 1038 of first-in first-out type.
Wherein, the first register 1034 and the second register 1038 can be same depositingDevice can be also two separate registers.
As the description in above, in the packet that host computer 101 sends, may there be two kindsContent, the one, instruction, the 2nd, data, main control module 102 after receiving packet,First the work of doing is content entrained in identification data bag. , main control module 102Comprise: identification circuit and transfer circuit;
Identification circuit, whether the packet sending for identifying host computer 101, existTarget identifying code, if exist, controls transfer circuit work;
Transfer circuit, for being sent to spread processing module by the target data of packet103. The mode that identification circuit is distinguished content in packet is the content in read data packet(can be the content of assigned address, as packet header, bag tail), and judge in the content readingWhether there is identification code, by judging whether identification code exists, just can specified data bag inWhether carry target data. And then, can control transfer circuit and whether work.
The wireless communicator that on the whole the application provides, it compared with prior art, shouldWireless communicator adopts up-to-date spread spectrum radio communication chip, strong interference immunity, and power consumption is little, connectsReceive highly sensitively, ability through walls is strong, is applicable to the Wireless Data Transmission application under complex environment.The utility model has been applied to concentrator and the wireless POS in wireless kilowatt meter reading-out system, realBorder is tested and is shown, module, in low-power consumption application, is no more than answering of 50mW in transmitting powerWith under restrictive condition, penetrable more than 10 layers residential building concrete floor or wall are realized reliableCommunication, horizon communication distance exceedes 3000 meters, and quantity through walls and communication distance are all than conventional narrowBand communication module is improved more than 2 times, can better meet the environmental requirement of community radio meter register.
The above, be only detailed description of the invention of the present utility model, but of the present utility modelProtection domain is not limited to this, is anyly familiar with those skilled in the art in this practicalityIn the technical scope of novel exposure, can expect easily changing or replacing, all should be encompassed in this realityWithin novel protection domain. Therefore, protection domain of the present utility model should be described with powerThe protection domain that profit requires is as the criterion.
Claims (10)
1. wireless communicator, is characterized in that, comprising:
The main control module, spread processing module and the radio-frequency antenna that are linked in sequence;
Described main control module, the packet sending for obtaining host computer, and by described numberBe sent to spread processing module according to the target data in bag;
Described spread processing module, for described target data is encoded and spread spectrum, withGenerate echo signal;
Described radio-frequency antenna, for being sent to opposite end module by described echo signal.
2. wireless communicator according to claim 1, is characterized in that, also comprises:Be connected to the SPI interface between described main control module and described spread processing module.
3. wireless communicator according to claim 2, is characterized in that, described expansionFrequently processing module comprises:
Be linked in sequence modulation spectrum-spreading unit between radio-frequency antenna and SPI interface, encoder,Packet constructor;
Described packet constructor is target data bag for packing target data;
Described encoder, for described target data bag is encoded, believes with generating referenceNumber;
Described modulation spectrum-spreading unit, for described reference signal is modulated and spread spectrum, withGenerate described echo signal.
4. wireless communicator according to claim 3, is characterized in that, described expansionFrequently processing module also comprises:
The demodulation unit, the forward direction that are linked in sequence between radio-frequency antenna and SPI interface entangleWrong unit and the unit of extracting;
Described demodulation unit, separates for the spread-spectrum signal that opposite end module is sentMediation despreading processing;
Described forward error correction unit, for will be through described demodulation process, and through described solutionExpand described spread-spectrum signal after treatment and carry out correction process;
The described unit of extracting, for entering the described spread-spectrum signal after described correction processRow is resolved, to generate reception data.
5. wireless communicator according to claim 4, is characterized in that, describedExtract and between unit and described SPI interface, be also connected with the first register of first-in first-out type.
6. wireless communicator according to claim 3, is characterized in that, describedBetween packet constructor and described SPI interface, being also connected with second of first-in first-out type depositsDevice.
7. wireless communicator according to claim 1, is characterized in that, describedMain control module is connected by serial line interface with described host computer.
8. wireless communicator according to claim 1, is characterized in that, described masterControl module comprises: identification circuit and transfer circuit;
Described identification circuit, the packet sending for identifying described host computer, whetherThere is target identifying code, if exist, control described transfer circuit work;
Described transfer circuit, for being sent to described expansion by the target data of described packetFrequently processing module.
9. wireless communicator according to claim 1, is characterized in that, described masterControl module is MCU.
10. wireless communicator according to claim 1, is characterized in that, described expansionFrequently processing module is Sub-GHz cake core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521131367.3U CN205265682U (en) | 2015-12-30 | 2015-12-30 | Wireless communicator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521131367.3U CN205265682U (en) | 2015-12-30 | 2015-12-30 | Wireless communicator |
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| CN205265682U true CN205265682U (en) | 2016-05-25 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106251601A (en) * | 2016-08-31 | 2016-12-21 | 广西捷佳润科技股份有限公司 | The special remote wireless controller of agricultural |
| CN106330402A (en) * | 2016-08-30 | 2017-01-11 | 中兴长天信息技术（南昌）有限公司 | LORA wireless transmission system error encoding method for Internet of Things |
| CN106406202A (en) * | 2016-10-21 | 2017-02-15 | 合肥工业大学 | Building environment safety monitoring device based on LoRa technology |
| CN106452478A (en) * | 2016-10-21 | 2017-02-22 | 何怡刚 | LoRa wireless radio frequency communication device used for health-state real-time monitoring |
| CN106603525A (en) * | 2016-12-09 | 2017-04-26 | 杭州古北电子科技有限公司 | Bidirectional wireless communication protocol based on Sub-GHz small wireless radio frequency device |
| CN106652417A (en) * | 2017-01-13 | 2017-05-10 | 成都中科慧源科技有限公司 | Double-module wireless communication concentrator |
| CN109091132A (en) * | 2018-06-28 | 2018-12-28 | 西安交通大学 | A kind of device measuring intracranial pressure |
-
2015
- 2015-12-30 CN CN201521131367.3U patent/CN205265682U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106330402A (en) * | 2016-08-30 | 2017-01-11 | 中兴长天信息技术（南昌）有限公司 | LORA wireless transmission system error encoding method for Internet of Things |
| CN106251601A (en) * | 2016-08-31 | 2016-12-21 | 广西捷佳润科技股份有限公司 | The special remote wireless controller of agricultural |
| CN106406202A (en) * | 2016-10-21 | 2017-02-15 | 合肥工业大学 | Building environment safety monitoring device based on LoRa technology |
| CN106452478A (en) * | 2016-10-21 | 2017-02-22 | 何怡刚 | LoRa wireless radio frequency communication device used for health-state real-time monitoring |
| CN106452478B (en) * | 2016-10-21 | 2018-12-21 | 何怡刚 | A kind of LoRa radio frequency communication devices for health status real-time monitoring |
| CN106603525A (en) * | 2016-12-09 | 2017-04-26 | 杭州古北电子科技有限公司 | Bidirectional wireless communication protocol based on Sub-GHz small wireless radio frequency device |
| CN106652417A (en) * | 2017-01-13 | 2017-05-10 | 成都中科慧源科技有限公司 | Double-module wireless communication concentrator |
| CN109091132A (en) * | 2018-06-28 | 2018-12-28 | 西安交通大学 | A kind of device measuring intracranial pressure |
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