CN203504759U - Wireless sensor node based on Modbus protocol and network composed of wireless sensor node - Google Patents
Wireless sensor node based on Modbus protocol and network composed of wireless sensor node Download PDFInfo
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- CN203504759U CN203504759U CN201320493220.3U CN201320493220U CN203504759U CN 203504759 U CN203504759 U CN 203504759U CN 201320493220 U CN201320493220 U CN 201320493220U CN 203504759 U CN203504759 U CN 203504759U
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The utility model discloses a wireless sensor node based on the Modbus protocol, and the node comprises a communication module, a microprocessor, and a sensor module. The communication module is connected with the microprocessor, and is used for achieving wireless-network communication. The sensor module is connected with the microprocessor, and is used for collecting sensing data and transmitting the sensing data to the microprocessor for processing. The node is in the state of timing awaking. When the time of timing awaking arrives, the communication module monitors an air radio wave. If a local-machine communication signal is monitored, the communication module receives data, or else, the communication module is in the state of dormancy. According to a network based on the above node, the node is in the state of dormancy when there is no data needs to be received, thereby preventing power consumption during no operation. Only when the data transmission is carried out, is the node awakened for communication, thereby preventing the node from generating a large quantity of power consumption caused by working for a long time, increasing the ad-hoc network function, and improving adaptability.
Description
Technical field
The utility model relates to technical field of image processing, relates in particular to a kind of wireless sensor node based on Modbus agreement and the network of formation thereof.
Background technology
In recent years, due to the fast development of various new technologies, make the cost of wireless sensor network, also promote it in the research of the basic fields such as route, energy source optimization, data fusion, promote its application in agricultural production simultaneously.Wireless sensor network is flexible with its Node configuration, compatible strong, the wiring of data acquisition and the advantage such as maintenance cost is low, in greenhouse information gathering and environment control field, is also applied widely.
At present, technical scheme wireless sensor network node being applied in greenhouse information gathering is as follows:
(1) adopt multiple radio frequency, user or supplier uses self-defined communications protocol, or modifies on the basis of existing communication agreement, and transducer developer also can build wireless sensor network according to the self-defined related protocol of the demand of oneself.Part manufacturer releases the agreement of its support when releasing radio frequency chip, as the ANT of NORDIC company, and the Digi mesh of Digi company, third company also can release corresponding wireless communication agreement, as tinyOS etc.
(2) adopt standard Zigbee, WiFi the ripe communication protocol such as bluetooth, 6LoWPAN, the general 2.4G frequency range that adopts, owing to thering is corresponding international standard, support, adopt the wireless sensor network current application of this agreement comparatively extensive, there is at present more ripe technical scheme, but this scheme is because protocol stack is comparatively complicated, and energy loss-rate is also very high, and only operative sensor node can be mutually general.
(3) adopt the transducer design separated with wireless receiving and dispatching terminal, this kind of application scheme is to be mainly transformed into wireless device for traditional wireline equipment, can wireless transparent transceiver terminal be installed with lower cost, is connected by serial ports with relevant device.This scheme employing wireless transparent transmission or the device with protocol conversion are realized the fusion of two kinds of networks.Equipment such as current Modbus protocol network is widely used at aspects such as PLC, collector, controllers, if these equipment need to be combined with wireless senser, needs to provide associated gateway equipment.The application of current Modbus agreement in industry spot is comparatively extensive, the relevant device of supporting is more, if but adopt private radio transducer, need to revise relevant device agreement, to adapt to wireless sensor network, and can not carry out seamless combination with legacy equipment, increase scientific research cost.
According to above-mentioned three kinds of schemes, wireless sensor network implementation has multiple, but also needs to consider the requirement of the aspects such as radio-frequency range, communication distance, power consumption are how many, networking mode.Greenhouse employing wireless transducer has very high requirement to facility environment adaptability, stability, such scheme is except outdoor utility wireless senser, because wireless sensor node can not adapt to hot and humid environment, cause wireless frequency drift, product stability is inadequate; Most wireless sensor nodes adopt complicated communications protocol, directly cause offered load large, and in actual moving process, power consumption is bigger than normal, are difficult to control, and cause real-time property not strong when network is huge; A lot of wireless sensers only support single-sensor to realize simple function collection, and to reduce to greatest extent power consumption, the node of simultaneously measuring multiple sensors much adopts solar cell, high capacity cell, can increase integral node and hardware cost.
In sum, the load in existing scheme, network being produced is large, and power consumption is also very large in the course of the work.
Utility model content
(1) technical problem that will solve
For above-mentioned defect, the technical problems to be solved in the utility model is how to reduce offered load and the power consumption of wireless sensor network node.
(2) technical scheme
For addressing the above problem, the utility model provides a kind of wireless sensor node based on Modbus agreement, comprising: communication module, microprocessor and sensor assembly;
Described communication module is connected with described microprocessor, for realizing wireless communication;
Described sensor assembly is connected with described microprocessor, for gathering sensing data, and sends to described microprocessor to process described sensing data;
Described wireless sensor node has the networking of search command function, in timing wake-up state, when reaching timing wake-up during the time, described communication module is intercepted air radio magnetic wave, if listen to the machine signal of communication, described communication module receives data, otherwise described communication module enters resting state.
Further, described communication module is wireless radio frequency modules.
Further, described microprocessor is single-chip microcomputer.
Further, described sensor assembly comprises: analog sensor, pulse transducer and digital sensor.
Further, described wireless sensor node also comprises Circuit tuning module, described Circuit tuning module is connected with described pulse transducer with described analog sensor respectively, the analog signal of described analog sensor collection is converted to standard voltage signal, converts the high-voltage pulse signal of described pulse transducer collection to calibration pulse signal.
Further, described digital sensor is connected with described microprocessor, and the data of described digital sensor collection directly send described microprocessor to and process.
Further, described wireless sensor node also comprises module is set, the described module that arranges comprises that node serial number arranges module and transducer kind arranges module, described node serial number arranges module for this wireless sensor node is numbered, and described transducer kind arranges module and adopts toggle switch to arrange the kind of transducer.
Further, described wireless sensor node also comprises power supply modular converter, described power supply modular converter comprises: power module, booster circuit and power supply management module, described power module provides power supply for described wireless sensor node, the power supply that described booster circuit provides described power module carries out voltage transitions, voltage after conversion is input to described microprocessor module, and described power supply management module is connected with described sensor assembly, for described sensor assembly provides power supply.
For addressing the above problem, the utility model also provides a kind of wireless sensor network based on Modbus agreement, except comprising above-mentioned wireless sensor node, also comprise: gateway node, at least one wireless sensor node is connected with described gateway node, based on Modbus agreement, forms star network.
Further, described wireless sensor network also comprises: routing node, and at least one routing node is connected with described gateway node, and each routing node is connected with wireless sensor node described at least one, based on Modbus agreement, forms tree network.
(3) beneficial effect
The utility model provides a kind of wireless sensor node based on Modbus agreement and the network of formation thereof, and wireless sensor node comprises: communication module, microprocessor and sensor assembly; Communication module is connected with microprocessor, for realizing wireless communication; Sensor assembly is connected with microprocessor, for gathering sensing data, and sends to microprocessor to process sensing data.Wireless sensor node is in timing wake-up state, when the timing wake-up time then, communication module is intercepted air radio magnetic wave, if listen to signal of communication, communication module receives data, otherwise communication module enters resting state.The utility model also provides based on above-mentioned wireless sensor node and has carried out based on Modbus agreement the network that networking obtains, latticed form is star network or tree network, simplify wireless communication network architecture, when not having data to receive, sensor node, in resting state, avoids also producing power consumption when it is not worked, only when carrying out transfer of data, just sensor node is waken up, communicate, can avoid the long-term total mistake of sensor node to produce a large amount of power consumptions, realize super low-power consumption.Simultaneously, in sensor node other sensor node work during in resting state, can also reduce offered load.Wireless sensor node network in the utility model is owing to can supporting multiple sensors, can according to demand the kind of transducer be selected and be changed, simultaneously because this network builds based on Modbus agreement, can also increase the MANET function of network, can adapt to large-scale application, range of application is wider, has improved generality and the adaptability of wireless sensor node network.
Accompanying drawing explanation
Fig. 1 is the composition schematic diagram of a kind of wireless sensor node based on Modbus agreement of the utility model;
Fig. 2 is the starshaped net topology figure of a kind of wireless sensor network based on Modbus agreement of the utility model;
Fig. 3 is the tree network topology structure chart of a kind of wireless sensor network based on Modbus agreement of the utility model;
Fig. 4 is the composition structure chart of circuit board in the wireless sensor node of the utility model based on Modbus agreement;
Fig. 5 is the outside drawing of the wireless sensor node instrument of the utility model based on Modbus agreement;
Layout when Fig. 6 is the wireless sensor node apparatus installation of the utility model based on Modbus agreement.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples are used for illustrating the utility model, but are not used for limiting scope of the present utility model.
A kind of wireless sensor node based on Modbus agreement is provided in the present embodiment, and it forms schematic diagram as shown in Figure 1, comprising: communication module 11, microprocessor 12 and sensor assembly 13;
Wireless sensor node has the networking of search command function, in timing wake-up state, when the timing wake-up time then, 11 pairs of air radio magnetic waves of communication module are intercepted, if listen to the machine signal of communication, communication module receives data, otherwise communication module 11 enters resting state.
Above-mentioned wireless sensor node utilizes sensor assembly image data, sends the data to microprocessor and processes, and microprocessor is obtaining of user sensor data not only, also for realizing wireless communication.This wireless sensor node is in timing wake-up state, reaching timing wake-up was just waken up during the time, intercept air radio wave, if do not listen to signal of communication, this wireless sensor node enters resting state, to save power consumption, while only listening to signal of communication, just by communication module, receive data, and be automatically linked into resting state when reception data complete, by this energy-conservation die change formula, can the power consumption of radio communication be dropped to minimum.
Preferably, communication module 11 is wireless radio frequency modules, and the wireless communication module in the present embodiment adopts ACP240, and this radio-frequency module has lower power consumption, possesses multiple energy saving modes simultaneously.
Preferably, microprocessor 12 is single-chip microcomputer, for sensing data, puts into and obtains and realize the functions such as wireless communication, and the microprocessor in the present embodiment adopts MSP430 series monolithic.MSP430 series is a kind of 16 super low-power consumptions of producing of Texas Instruments (TI), the mixed-signal processor (Mixed Signal Processor) with reduced instruction set computer (RISC), be referred to as mixed-signal processor, be because it is for practical application request, the analog circuit of a plurality of difference in functionalitys, digital circuit blocks and microprocessor are integrated on a chip.MSP430 series monolithic has that disposal ability is strong, the advantage such as aboundresources in fast operation, super low-power consumption and sheet.Concrete, in the present embodiment, single-chip microcomputer model is MSP430F249.
Preferably, the sensor assembly in the present embodiment 13 comprises: analog sensor 131, pulse transducer 132 and digital sensor 133.Analog sensor 131 is for obtaining analog sensed data, pulse transducer 132 is for obtaining high-voltage pulse signal, due to the equal data digital signal not of analog sensed data and high-voltage pulse signal, so also will adjust it, obtain being just transferred to microprocessor 11 after digital signal and process.
The above-mentioned three kinds of transducers of just take in the present embodiment describe as example, and the kind of transducer can also be carried out other selections according to application demand in actual applications.
Preferably, wireless sensor node in the present embodiment also comprises: Circuit tuning module 14, Circuit tuning module 14 is connected with pulse transducer 132 with analog sensor 131 respectively, the analog signal that analog sensor 131 is gathered is converted to standard voltage signal, Circuit tuning module 14 act as adjustment analog signal, make non-standard analog signal be converted to standard voltage signal, just can send to afterwards microprocessor 11 to process.Circuit tuning module 14 is connected with pulse transducer 132, convert the high-voltage pulse signal of pulse transducer collection to calibration pulse signal, the effect of Circuit tuning module 14 is converted to high-voltage pulse signal the calibration pulse signal that can measure of standard through isolation, calibration pulse signal is herein 3V pulse signal.
The digital sensor 133 of sensor assembly 13 is connected with microprocessor 11 directly, and the data that digital sensor 133 gathers do not need Circuit tuning module 14 to adjust, and directly send microprocessor 11 to and process.
Preferably, wireless sensor node in the present embodiment also comprises: module 15 is set, comprise that node serial number arranges module 151 and transducer kind arranges module 152, node serial number arranges module 151 for this wireless sensor node is numbered, adopting BCD encoder is that each node forming in wireless sensor network is numbered, transducer kind arranges module 152 and adopts toggle switch to arrange the kind of transducer, and the corresponding relation of specific coding and transducer kind is as shown in table 1.
Table 1
Preferably, wireless sensor node in the present embodiment also comprises: power supply modular converter 16, power supply modular converter comprises: power module 161, booster circuit 162 and power supply management module 163, power module 161 is for wireless sensor node provides power supply, and in the present embodiment, power supply is No. 1 alkaline battery of 2 joint.The power supply that 162 pairs of power modules of booster circuit provide carries out voltage transitions, voltage after conversion is input to microprocessor module, in the present embodiment, in booster circuit 162, adopting TPS61221 is miniature low input boost converter, cell voltage is converted to the normal voltage of 3.3V, for microprocessor 11 is powered.Power supply management module 163 is connected with sensor assembly 13, for sensor assembly 13 provides power supply.The present embodiment also adopts mains switch chip XC8102 to be respectively every channel sensor simultaneously provides power supply to supply with.
Owing to supporting star network and tree network at nodes, meet the complete demand of group that production is set, a kind of wireless sensor network based on Modbus agreement that carries out networking formation based on the above-mentioned wireless sensor node based on Modbus agreement is also provided in the present embodiment, except comprising above-mentioned wireless sensor node 10, also comprise: gateway node 20, at least one wireless sensor node 10 is connected with gateway node 20, based on Modbus agreement, form star network, starshaped net topology as shown in Figure 2.
Star sensor node forms star network as child node and gateway node, gateway node (being generally PC or collector, the controller of supporting Modbus agreement) directly and sensor node with Modbus agreement, communicate, transducer is always in low-power consumption mode, relevant while reading register instruction when having, just waken system starts pick-up transducers data, and the data that gather are sent to the gateway node of far-end, to reduce power consumption.In the present embodiment, adopt Modbus agreement, because it has MANET function.
Wireless sensor network can also be tree-like networking mode, in network except sensor node 10 and gateway node 20 also comprise: routing node 30, at least one routing node 30 is connected with gateway node 20, each routing node 30 is connected with at least one wireless sensor node 10, based on Modbus agreement, form tree network, tree network topology structure as shown in Figure 3.
In tree network, gateway node 20 is as network center, the part using sensor node 10 as routing node 30, and routing node 30, for extended network scale and communication distance, increases 0x42 instruction and builds tree network.
By gateway node 20, send networking instruction, the node that instruction can arrive can both have response, the node with response is classified as routing node 30 by system, its can collection itself transducer, the function also with routing function, transmission networking request simultaneously, the node that those are failed to networking is classified as the child node of routing node management, other routing node receive networking instruction ultramagnifier be routing node 30, do not add this routing node.If certain node damages, gateway node 20 does not collect this data.If routing node 30 damages, the node of its management will receive that other routing node 30 networking signals build new network, and network total length is short, and cost is lower, and node is also easy to expand.
The form of above-mentioned employing Modbus protocol host transmission message is as shown in table 2.
Table 2
| Main frame sends | Byte number | The information sending | |
| Slave addresses | |||
| 1 | 0x01 | Be sent to address and be 01 | |
| Function code | |||
| 1 | 0x03 | Read register | |
| |
2 | 0x0000 | Initial address is 0000 |
| |
2 | 0x0005 | Read 3 registers (totally 6 bytes) |
| |
2 | 0x85C9 | CRC code low level is front, high-order rear |
Sensor node phase response message form is as shown in table 3.
Table 3
| Slave response | Byte number | The information of returning | |
| Slave addresses | |||
| 1 | 01 | The slave that is 01 from | |
| Function code | |||
| 1 | 03 | Read register | |
| Read |
1 | |
5 registers are totally 10 bytes |
| Register 0 | 2 | 0 | Address is the content of 0000 |
| Register | |||
| 1 | 2 | 0 | Address is the content of 0001 |
| Register | |||
| 2 | 2 | 0 | Address is the content of 0002 |
| Register | |||
| 3 | 2 | 0 | Address is the content of 0003 |
| Register | |||
| 4 | 2 | 0 | Address is the content of 0004 |
| CRC code | |||
| 2 | XXXX | By slave, calculate CRC code |
It is as shown in table 4 that wherein 0x42 node is searched networking command format.
Table 4
| Address field | Instruction | The network address | Node address | Node species | CRCH | CRCL |
| 0x01 | 0X42 | 0X01 | 0X05 | ? | 0x21 | 0x9D |
In table 4, the network address represents routing node address; Node address represents the address of each Node configuration; Node species be respectively gateway node with 0x01 represent, routing node with 0x02 represent, sensor node represents with 0x03; CRCH is cyclic redundancy check (CRC) code (Cyclic Redundancy Check) high position; CRCL is cyclic redundancy check (CRC) code (Cyclic Redundancy Check) low level.
Below above-mentioned wireless sensor network is described based on Modbus agreement in greenhouse:
Wherein Modbus agreement is a kind of all-purpose language being applied on electronic controller.By this agreement, controller each other, controller is for example, via communicating by letter between network (Ethernet) and miscellaneous equipment.It has become a universal industrial standard.The control appliance of producing according to Modbus agreement different vendor can be linked to be industrial network, carries out centralized monitor.This protocol definition controller can be familiar with the message structure using, and no matter they through which kind of network communicate.The equipment of Modbus protocol network is at PLC(programmable logic controller (PLC) at present, Programmable Logic Controller), the aspect such as collector, controller is widely used, if these equipment need to be combined with wireless senser, needs to provide associated gateway equipment.
When communicating by letter on a Modbus protocol network, this agreement has determined that each controller need know their device address, the message that identification is sent by address, and which kind of action decision will produce.If need to respond, controller also sends generation feedback information by Modbus agreement.On other network, frame or the pack arrangement of the message conversion that has comprised Modbus agreement for using on this network.The method that solves save land location, routed path and error detection according to concrete network has also been expanded in this conversion.This agreement is supported traditional RS-232, RS-422, RS-485 and ethernet device.Many industrial equipments, comprise PLC, DCS(Distributed Control Systems, scattered control system), intelligent instrument etc. all using Modbus agreement as the communication standard between them.
In the present embodiment, in wireless sensor node, the composition structure of circuit board is as shown in Figure 4, except comprising above-mentioned communication module 11, microprocessor 12, sensor assembly 13, Circuit tuning module 14, arranging module 15 and power supply modular converter 16, also comprise: at an edge of circuit board, be also provided with pad pasting keystroke interface 17 and mains switch 18.Pad pasting keystroke interface 17 is for connecting the pad pasting that is affixed on watchcase 2 on instrument, and pad pasting provides node reset and status display function.
The present embodiment also provides the sensor node instrument forming based on foregoing circuit plate, the outward appearance of this instrument as shown in Figure 5, foregoing circuit plate 22 is fixed on to instrument lower casing 5 inner bottom parts by four screws 21, because circuit board and screw are all in instrument internal, so not shown in Fig. 5.Pad pasting is attached to watchcase 2 its cables on instrument and by perforate 3, is connected to the pad pasting interface of circuit board 22, and instrument upper casing 2 passes through four screws with instrument lower casing 5, and sealing ring 4 is fixed as one; Instrument lower casing 5 has two holes 6, for waterproof port is installed, by water joint transducer, is connected with 22 sensor assembly 13 on internal circuit board.Finally also need screw 1 by upper casing 2 and be fixedly connected on lower casing 5.
In use procedure, above-mentioned node instrument is fixed on fixed support plate 23 by 4 screws 8, antenna outlet 9 is on instrument lower casing 5 tops, so layout during wireless sensor node apparatus installation as shown in Figure 6.Supporting bracket 23 wherein can also be wall or the special supporting construction for stationary nodes instrument arranging.
The operation of node instrument time need to first be opened internal circuit switching plate 18, after the complete bright and 1s such as pad pasting state indication, closes and shows node normal operation.Node instrument in resting state, needs outside collecting device to support standard Modbus agreement just can activate node, according to agreement image data through program initialization.
In sum, the wireless sensor node based on Modbus agreement that the present embodiment provides and the wireless sensing of formation thereof, standard Modbus agreement is directly embedded in wireless sensor network, and agreement is supplemented to revision, make it not only meet support standard agreement but also can meet adhoc mode; By toggle switch, be easy to just can select the kind of transducer, the sensing data of transducer can be the various species such as aerial temperature and humidity, soil temperature and humidity, blade face humiture, wind speed and direction, illumination, radiation, light quantum, soil EC value; Completely airtight by using Modbus agreement can realize sensor node, make it more adapt to greenhouse adverse circumstances.
With existing technology comparison, the wireless sensor node of the present embodiment and the advantage of radio sensing network are: network configuration is simple, agreement load is low, in application process, support that the equipment of Modbus agreement can both be very fast with wireless sensor network node communication, passive type application model, node is for a long time in resting state, when outside need data, just can wake node up, gather and send data, significantly reduce power consumption, extend network time; Increase MANET function, can realize Mesh network, can adapt to fairly large application, meet in the group's functional need of large area greenhouse; General sensor interface, supports greenhouse multiple sensors, only needs more emat sensor kind, and in-site measurement parameter satisfies the demands.
Above execution mode is only for illustrating the utility model; and be not limitation of the utility model; the those of ordinary skill in relevant technologies field; in the situation that not departing from spirit and scope of the present utility model; can also make a variety of changes and modification; therefore all technical schemes that are equal to also belong to category of the present utility model, and scope of patent protection of the present utility model should be defined by the claims.
Claims (10)
1. the wireless sensor node based on Modbus agreement, is characterized in that, comprising: communication module, microprocessor and sensor assembly;
Described communication module is connected with described microprocessor, for realizing wireless communication;
Described sensor assembly is connected with described microprocessor, for gathering sensing data, and sends to described microprocessor to process described sensing data;
Described wireless sensor node has the networking of search command function, in timing wake-up state, when reaching timing wake-up during the time, described communication module is intercepted air radio magnetic wave, if listen to the machine signal of communication, described communication module receives data, otherwise described communication module enters resting state.
2. wireless sensor node as claimed in claim 1, is characterized in that, described communication module is wireless radio frequency modules.
3. wireless sensor node as claimed in claim 1, is characterized in that, described microprocessor is single-chip microcomputer.
4. wireless sensor node as claimed in claim 1, is characterized in that, described sensor assembly comprises: analog sensor, pulse transducer and digital sensor.
5. wireless sensor node as claimed in claim 4, it is characterized in that, described wireless sensor node also comprises Circuit tuning module, described Circuit tuning module is connected with described pulse transducer with described analog sensor respectively, the analog signal of described analog sensor collection is converted to standard voltage signal, converts the high-voltage pulse signal of described pulse transducer collection to calibration pulse signal.
6. wireless sensor node as claimed in claim 4, is characterized in that, described digital sensor is connected with described microprocessor, and the data of described digital sensor collection directly send described microprocessor to and process.
7. wireless sensor node as claimed in claim 1, it is characterized in that, described wireless sensor node also comprises module is set, the described module that arranges comprises that node serial number arranges module and transducer kind arranges module, described node serial number arranges module for this wireless sensor node is numbered, and described transducer kind arranges module and adopts toggle switch to arrange the kind of transducer.
8. wireless sensor node as claimed in claim 1, it is characterized in that, described wireless sensor node also comprises power supply modular converter, described power supply modular converter comprises: power module, booster circuit and power supply management module, described power module provides power supply for described wireless sensor node, the power supply that described booster circuit provides described power module carries out voltage transitions, voltage after conversion is input to described microprocessor module, described power supply management module is connected with described sensor assembly, for described sensor assembly provides power supply.
9. the wireless sensor node based on Modbus agreement based on described in claim 1-8 any one carries out the wireless sensor network of networking formation, it is characterized in that, described wireless sensor network also comprises: gateway node, at least one wireless sensor node is connected with described gateway node, based on Modbus agreement, forms star network.
10. wireless sensor node as claimed in claim 9, it is characterized in that, described wireless sensor network also comprises: routing node, at least one routing node is connected with described gateway node, each routing node is connected with wireless sensor node described at least one, based on Modbus agreement, forms tree network.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104639618A (en) * | 2015-01-13 | 2015-05-20 | 南京康尼机电股份有限公司 | Wireless networking system and method of working parameters of rail vehicle equipment or mechanism |
| CN106292312A (en) * | 2015-06-10 | 2017-01-04 | 美的集团股份有限公司 | The control method of ZigBee pairing packet and equipment |
| CN107994915A (en) * | 2017-11-22 | 2018-05-04 | 广西英格利科技有限公司 | A kind of general Sub1G wireless low-power consumptions sensing node |
| CN110978963A (en) * | 2019-12-26 | 2020-04-10 | 科大讯飞股份有限公司 | Vehicle-mounted air purification method and system and vehicle-mounted data processing method and device |
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2013
- 2013-08-13 CN CN201320493220.3U patent/CN203504759U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104639618A (en) * | 2015-01-13 | 2015-05-20 | 南京康尼机电股份有限公司 | Wireless networking system and method of working parameters of rail vehicle equipment or mechanism |
| CN104639618B (en) * | 2015-01-13 | 2018-03-30 | 南京康尼机电股份有限公司 | The wireless networking system and method for a kind of railway vehicle device or mechanism running parameter |
| CN106292312A (en) * | 2015-06-10 | 2017-01-04 | 美的集团股份有限公司 | The control method of ZigBee pairing packet and equipment |
| CN106292312B (en) * | 2015-06-10 | 2018-12-18 | 美的集团股份有限公司 | The control method and equipment of ZigBee pairing grouping |
| CN107994915A (en) * | 2017-11-22 | 2018-05-04 | 广西英格利科技有限公司 | A kind of general Sub1G wireless low-power consumptions sensing node |
| CN110978963A (en) * | 2019-12-26 | 2020-04-10 | 科大讯飞股份有限公司 | Vehicle-mounted air purification method and system and vehicle-mounted data processing method and device |
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