CN104901990B - Sensor flexibility access system and its flexible cut-in method based on Internet of Things - Google Patents
Sensor flexibility access system and its flexible cut-in method based on Internet of Things Download PDFInfo
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Abstract
The present invention relates to a kind of sensor flexibility access system based on Internet of Things, including an at least sensor, at least an at least terminal node, a user application terminal, at least a coordinator；The terminal node includes an at least flexible interface.The present invention relates to a kind of sensor flexibility cut-in method based on Internet of Things, including setting a terminal node, setting a coordinator and a user application terminal；The sensor accessed is connected to the flexible interface of the corresponding sensor；And the sensor is registered in the operating system of terminal node.The invention has the advantages that can additionally access different type, the sensor of different purposes on existing internet-of-things terminal node, it is compatible on software and hardware with terminal module to realize the awareness apparatus such as different sensors.Sensor flexibility access technology economy provided by the invention based on Internet of Things, efficiently, reliable, favorable expandability, good compatibility.
Description
Technical field
The present invention relates to a kind of sensor flexibility access system based on Internet of Things and its flexible cut-in methods.
Background technology
Technology of Internet of things is quickly grown, and is had become the world information after computer internet and mobile radio communication and is produced
Industry third wave.The Future Information developing direction and strategy of countries in the world, from different directions to Internet of Things lean on into.
Internet of Things can substantially be divided into three layers, sensing layer, network layer and application layer.Internet-of-things terminal node, which is used as, is in object
The equipment of networking pyramid bottom serves as data acquisition, preliminary treatment conversion, the effect to upper layer transport, is in Internet of Things
Key equipment, could be by various external sensible tidal data recoverings and processing, and by number by the conversion and acquisition of internet-of-things terminal
It is transferred to according to by various communication modes in internet.Therefore the development level of Internet of Things is largely dependent on internet-of-things terminal
Research and development and application level.
Internet-of-things terminal equipment is the core composition that Internet of Things perceives.Current traditional internet-of-things terminal is mostly for certain
The application of one specific area and the simple function terminal developed, the general external interface of the Terminal Type is less, only meets single application
Or the part extension of single application, in addition to this application, other can not be applied in the case of without hardware modifications
In conjunction, it is impossible to change with application and carry out function modifications and expansion etc., versatility and compatibility are poor, restrict internet-of-things terminal and set
Standby use and popularization.
The content of the invention
The present invention provides a kind of sensor flexibility access system based on Internet of Things and its flexible cut-in method, effectively solves
Sensor interface in the prior art is less, obtains the technical problems such as data class single, poor compatibility.
To solve the above problems, the present invention provides following technical solution：
A kind of sensor flexibility access system based on Internet of Things is coordinated including an at least sensor, a terminal node, one
Device and a user application terminal；
The sensor, for gathering the environmental data around the sensor；
The user application terminal, for inputting operation instruction and showing the environmental data；
The terminal node, for obtaining the environmental data from the sensor and sending the environmental data to described
Coordinator；
The coordinator, for obtaining the environmental data, the transmission environmental data to described from the terminal node
User application terminal and the transmission operational order are to the terminal node；
The terminal node includes：
An at least flexible interface, for obtaining the environmental data from the sensor；
One modal processor, for carrying out format conversion processing to the environmental data；And
One node wireless communication module refers to for transmitting the environmental data to the coordinator and the transmission operation
It makes to the modal processor；
The coordinator includes a coordinator communication module, for obtaining the environmental data, transmits the operational order
To the terminal node；The coordinator communication module is corresponding with the node wireless communication module, with communication
Realize data exchange；
The sensor is connected to the terminal node by the flexible interface, and the terminal node is with side wireless communication
Formula is connected to the coordinator, and the coordinator is connected to the user application terminal by data cable.
Further, the flexible interface is the flexible sensor translation interface of the corresponding sensor, each sensor
It is connected to corresponding flexible interface.
Further, the operational order includes setting the setting of the flexible interface to instruct and for reading
State the reading instruction of environmental data.
Further, the coordinator communication module and the node wireless communication module are all 2.4G radio communication molds
Block.
The invention further relates to a kind of sensor flexibility cut-in methods based on Internet of Things, include the following steps：
One terminal node is set, and the terminal node includes an at least flexible interface and a modal processor, the flexibility
Interface is equipped with an operating system to correspond to the flexible sensor converting interface of the sensor accessed in the modal processor；
One coordinator and a user application terminal are set, and terminal node passes through number to the coordinator described in wireless connection
The application terminal is connected to the coordinator according to line；
The sensor accessed is connected to the flexible interface of the corresponding sensor；And
The sensor is registered in the operating system.
Further, the sensor is registered in the operating system, is included the following steps：
Create a virtual-sensor equipment chained list；
A virtual unit is registered in the virtual-sensor equipment chained list, the virtual unit includes virtual device information
And virtual drive interface；
Obtain corresponding sensor information and sensor driver by access sensor；And
The sensor information is assigned to the virtual device information, and the sensor driver is assigned to institute
State virtual drive interface.
Further, the virtual device information includes species, model and the function of the virtual unit, the virtual drive
Mobile interface writes function access port including an initialization function access port, a reading function access port and one；The biography of the sensor
Sensor information includes species, model and the function of the sensor；The sensor driver includes a sensor initializing
Function, a sensor read function and a sensor writes function.
Further, the sensor driver is assigned to the virtual drive interface, including：By the sensor
The address assignment of initialization function gives the initialization function access port；The sensor is read into the address assignment of function to described
Read function access port；And the sensor is write into the address assignment of function and writes function access port to described.
The invention has the advantages that a kind of flexible access system and its flexible cut-in method are provided, by the flexible access of sensor
To internet-of-things terminal node.Different type, the sensor of different purposes can be additionally accessed on existing internet-of-things terminal node, it is real
It is compatible on software and hardware with terminal module the awareness apparatus such as different sensors have been showed.The present invention by it is a kind of it is economical, efficiently,
Reliable way realizes the sensor flexibility access technology based on Internet of Things, favorable expandability, good compatibility.
Description of the drawings
Fig. 1 is the structure diagram of the sensor flexibility access system based on Internet of Things in the present invention；
Fig. 2 is the flow chart of the sensor flexibility cut-in method based on Internet of Things in the present invention；
Fig. 3 is the method flow diagram for registering the sensor in the present invention in the operating system of terminal node；
Fig. 4 is the sensor registration process schematic diagram newly accessed in the present invention.
Specific embodiment
Below in conjunction with the attached drawing specific embodiment that the present invention will be described in detail, those skilled in the art is made to become apparent from geography
How solution realizes the present invention.It will be appreciated that though the present invention describes its preferred embodiment, however these are pair
It the elaboration of embodiment rather than limits the scope of the invention.
As shown in Figure 1, the present invention relates to a kind of sensor flexibility access system based on Internet of Things, including at least one sensing
Device 1, a terminal node 2, a coordinator 3 and a user application terminal 4；Wherein, sensor 1 is all for gathering the sensor
The environmental data enclosed；For inputting operation instruction and showing the environmental data, the operational order includes for user application terminal 4
For the setting instruction for setting the flexible interface and for reading the reading of environmental data instruction；Terminal node 2 is used
In obtaining the environmental data from the sensor and send the environmental data to the coordinator；Coordinator 3 is used for from institute
It states terminal node and obtains the environmental data, the transmission environmental data to the user application terminal and the transmission behaviour
It instructs to the terminal node.
Terminal node 2 includes：
An at least flexible interface 21,22, for obtaining the environmental data from the sensor；
One modal processor 23, for carrying out format conversion processing to the environmental data；And
One node wireless communication module 24, for transmitting the environmental data to the coordinator and the transmission operation
It instructs to the modal processor；
Coordinator 3 includes a coordinator communication module 31, for obtaining the environmental data, the transmission operational order extremely
Terminal node 2；Coordinator communication module 31 is corresponding with node wireless communication module 24, realizes that data are handed over communication
It changes.
Modal processor 23 is the CC2530 type processors of Texas Instruments' production；Flexible interface 21,22 is corresponding institute
State the flexible sensor translation interface of sensor（Different types of conversion interface corresponds to different types of sensor）, flexibility biography
Sensor interface provides the self-defined GPIO pin and power pins that are connected with sensor 11, according to the sensor of access
1（Sensor 11）Difference, the self-defined pin of different flexible converting interfaces is set.Set the soft of internet-of-things terminal node 2
After property interface, it can start different sensors being connected in internet-of-things terminal section 2.Sensor 11,12 passes through flexibility
Interface 21,22 is connected to terminal node 2, and each sensor is connected to corresponding flexible interface, and sensor 11 is connected to soft
Property interface 21, sensor 12 are connected to a flexible interface 22.Coordinator communication module 31 is all with node wireless communication module 24
2.4G wireless communication modules realize data transmit-receive using radio-frequency antenna and power amplifier, and terminal node 2 is with communication
Coordinator 3 is connected to, order and data are packaged and generate corresponding wireless request bag by coordinator 3, are sent to terminal node 2；Eventually
The environmental data is packaged and generates wireless response bag by end node 2, coordinator 3 is sent to, between terminal node 2 and coordinator 3
Data exchange is realized with wireless request bag, wireless response packet form.Coordinator 3 is connected to user by RS232 serial port data lines
Application terminal 4, user application terminal 4 send serial ports request bag to coordinator 3, and the return serial ports response bag of coordinator 3 to user should
With terminal 4.
After the completion of the access of 11 hardware components of sensor, it is also necessary to the driver of sensor 11,12 is obtained using software.
In the operating system of terminal node, a virtual-sensor equipment chained list is created, in the virtual unit chained list, is had various types of
The virtual device information interface of type and the interface of driver, wherein, the virtual device information interface and the driver
Interface exist in the form of function pointer, for realize sensor driver access, it is only necessary to by the function of the interface
Pointer is directed toward corresponding driver, after all drivers and the facility information access of sensor, just in void
It proposes in standby chained list and forms a virtual unit, the operation to sensor of any application layer afterwards is all that this is virtually set
Standby operation.
A kind of sensor flexibility access system based on Internet of Things of the present invention, sensor is connect by flexible interface
It can be worked normally after entering system.By sensor by the method for flexible interface access system, connect including hardware access and software
Enter, explanation as detailed below.At work, after user sends operational order by user application terminal 3, user application terminal 3
Operational order is sent to by coordinator 4 by serial port data line, the operational order includes setting the flexible interface
Instruction is set and for reading the reading of environmental data instruction.Coordinator 1 is made according to the order that user terminal is sent
Corresponding response, and order is changed into wireless communication data frame, each terminal node 2 is sent to by communication, eventually
End node 2 can parse one of the various order and data after receiving data.What it is when user's transmission is described soft for setting
Property interface setting instruction when, according to the instruction sensors configured 11, terminal node 2 transfers the driving of 11 type of respective sensor
Program realizes the wireless telecommunications with sensor 11 by communication succession corresponding with 11 type of sensor and communication instruction；
When user send be for reading the reading of the environmental data instruction when, send sensor after 2 analysis instruction of terminal node
11 data read command waits 11 returned data of sensor.After sensor 11 is by the wireless network returned data, eventually
End node 2 therefrom parses required data according to corresponding sensor communication data format, and constructs wireless data packet,
It is sent to coordinator 4；After coordinator 4 receives data, the data that result is changed between coordinator and application terminal are led to
Agreement is interrogated, after end application detects the data that coordinator 4 is sent, the data of sensor and specifying information are passed through
User application terminal 3 is presented to the user, and user has just obtained data.
Subordinate list 1
| Address | Sensor type code | Function code | Data（It is optional） |
| 2 bytes | 1 byte | 1 byte | N byte |
Referring to subordinate list 1, which is the instruction format of user terminal to the serial ports request bag of coordinator, and communication mode is string
Mouth RS232 communications, wherein address is divided into two kinds, and coordinator address and terminal node address, coordinator address are fixed as 0x0000,
From 0x0002 to 0xFFF0,0x0001 is default addresses for use for terminal node address, and 0xFFFF is broadcast address；Sensor type code refers to
The flexibility to be operated is linked into the title of the sensor of terminal node, type code；Function code is used for representing the life of user's operation
Code name is made, 0x00 represents initializing sensor, and 0x01 represents to set sensor, and 0x02 represents to read sensing data, 0x03 tables
Show complicated order, 0x04 represents to check the working condition of coordinator, and 0x06 represents to wake up terminal node.Data bit is and order phase
The operand of pass, the several numbers of different command operations are different.
Subordinate list 2
| Length | Node address | Sensor type code | Function code | State | Data（It is optional） |
| 1 byte | 2 bytes | 1 byte | 1 byte | 1 byte | N byte |
Referring to subordinate list 2, which is instruction format of the coordinator to the serial ports response data packet of user terminal, wherein, length
Position is referred to coordinator returned data total length including itself；Node address refers to the address for the tag contact for sending the data；It passes
Sensor type codes represent title, the type code of the sensor of operation with table 1；The effect of function code is the same as table 1；State is used for table
Show that order performs as a result, 0xFE represents failure, 0xFF expressions run succeeded.Data are used for representing the data for returning to request, no
It is different with ordering.
3 coordinator of subordinate list is to the instruction format of the wireless request data packet of terminal node
| Prefix | Sensor type code | Node ID | Function code | Data（It is optional） |
| 1 byte | 1 byte | 1 byte | 1 byte | N byte |
Referring to subordinate list 3, which is instruction format of the coordinator to the wireless request data packet of terminal node, and wherein prefix is used
It realizes the retransmission mechanism of data, often sends once plus 1, whether be the data that repeat for judge to receive.Sensor class
The same Tables 1 and 2 of type code function；Node ID is used for representing the address for the terminal node that will be operated；Function code is used for representing difference
Operational order, function is identical with subordinate list 1；Data bit acts on, command operation data identical with subordinate list 1, behind different command
Operation data is different, some order no operand.
4 terminal node of subordinate list is to the instruction format of the wireless data response bag of coordinator
| Prefix | Sensor type code | Node ID | Function code | Mode bit | Data bit（It is optional） |
| 1 byte | 1 byte | 1 byte | 1 byte | 1 byte | N byte |
Referring to subordinate list 4, which is instruction format of the terminal node to the wireless data response bag of coordinator, and wherein prefix is used
To determine whether what is sent is same data, initial value 0 receives a data afterwards just on original basis every time afterwards
It is upper to add 1.Sensor type code function is identical with subordinate list 1；Node ID, function code are returned and sended over as request command, anticipate
It is adopted same；Mode bit is used for representing that request command performs state, if 0xFE expressions perform failure, if 0xFF then tables
Show and run succeeded.Data bit is used for representing the data of command request.
As shown in Fig. 2, the invention further relates to a kind of sensor flexibility cut-in method based on Internet of Things, including walking as follows
Suddenly：
Step S1）One terminal node is set, and the terminal node includes an at least flexible interface and a modal processor；Institute
Flexible interface is stated as the corresponding flexible sensor converting interface by access sensor, an operation system is installed in the modal processor
System；The modal processor is the CC2530 type processors of Texas Instruments' production, and the operating system is at CC2530 type
Manage the OSAL real time operating systems in the corresponding Zigbee protocol stack of device.
Step S2）One coordinator and a user application terminal be set, terminal node described in wireless connection to the coordinator,
The application terminal is connected to the coordinator by data cable；
Step S3）The sensor accessed is connected to the flexible interface of the corresponding sensor；And
Step S4）The sensor is registered in the operating system.
Wherein, on the flexible sensor interface, provide the self-defined GPIO pin being connected with sensor and
Power pins, it is different according to the environment sensing equipment of access, the self-defined pin of different flexible converting interfaces is set.The sensing
Device, the terminal node, the coordinator and the user application terminal and a kind of the above sensing based on Internet of Things
Device flexibility access system is identical, and internal structure need not repeat.Above-mentioned steps 1）-3）Part, step are accessed for hardware in the present invention
Rapid 4）Part is accessed for software, i.e., the driver of sensor 11,12 is obtained using software.
As shown in figure 3, registering the sensor in the operating system, include the following steps：
Step S401）A virtual-sensor equipment chained list is created in the operating system；The virtual-sensor equipment
Chained list can be used for storing different types of sensor information and corresponding variety classes sensor driver；
Step S402）A virtual unit is registered in the virtual-sensor equipment chained list, the virtual unit includes void
Intend facility information and virtual drive interface；The virtual device information includes species, model and the function of the virtual unit, institute
It states virtual drive interface and writes function access port including an initialization function access port, a reading function access port and one；The biography
The sensor information of sensor includes species, model and the function of the sensor；The sensor driver includes a sensing
Device initialization function, a sensor read function and a sensor writes function；
Step S403）Obtain corresponding sensor information and sensor driver by access sensor；User is by looking into
Read official's data of sensor（Such as sensor specification document）The sensor information and sensor of the sensor can be obtained
Driver, then it is inputted by user application terminal to the operating system of the terminal node；The sensing of the sensor
Device information includes species, model and function of the sensor etc.；The sensor driver includes a sensor initializing
Function, a sensor read function and a sensor writes function etc.；And
Step S404）The sensor information is assigned to the virtual device information interface, and the sensor is driven
Dynamic program is assigned to the virtual drive interface.
There is the interface of various types of virtual device information interfaces and driver in virtual unit chained list, to store
By the sensor information and sensor driver of access sensor.Wherein, the virtual device information interface and the driving
The interface of program exists in the form of function pointer, it is only necessary to which the function pointer of the interface is directed toward corresponding driver is
The access of sensor driver can be achieved.After all drivers and the facility information access of sensor, just in void
It proposes to form a virtual unit in standby chained list, the virtual unit is identical with the sensor accessed, after this any
Application layer is all operation to the virtual unit to the operation of sensor.
The sensor driver is assigned to the virtual drive interface, including：By the sensor initializing letter
Several address assignments gives the initialization function access port, performs virtual initialization function；The sensor is read to the ground of function
Location is assigned to the reading function access port, performs virtual reading function；And the sensor is write into the address assignment of function to institute
It states and writes function access port, execution virtually writes function.Certainly, the sensor driver may further include other executable letters
Number, according to the different type of sensor, specific driver is also different.
For example, as shown in figure 4, after determining the sensor accessed, determined by the official's data for consulting sensor 11
Corresponding sensor information and sensor driver, driver include initialization function, read function, write function
Deng.In virtual perception equipment chained list, the virtual perception of the correspondence of new registration one sensor 11 is set terminal node operating system
Standby 13, the sensor information of sensor 11 is assigned to the virtual device information of new registration, sensor driver is substituting to
Virtual device driver.Specifically, sensor driver is substituting to virtual device driver, refers to, in an operating system, will
Init functions（Sensor initializing function）Address assignment is to the Init function access ports of virtual unit 13（Initialization function accesses
Mouthful）, perform virtual initialization function；By Read functions（Sensor reads function）Address assignment is to the Read functions of virtual unit 13
Access port（Read function access port）, perform virtual reading function；By Write functions（Sensor writes function）Address assignment is to virtual sense
Know the Write function access ports of equipment 13（Write function access port）, perform and virtually write function；.It is completed newly by above step
The registration of the sensor 11 of addition realizes the flexible access of sensor 11.When to be operated to sensor 11, operating system
The virtual perception facility information 13 of new registration is found in virtual perception equipment chained list, virtual Init functions is run and completes to passing
The initialization of sensor 13；Virtual Write functions are run, just complete the write operation to sensor 13；Virtual Read functions are run, by
This is completed to sensor read operation.The virtual drive interface obtains the sensor driver, the virtual device driver
After operation, software access procedure is completed, and sensor 11 can be used normally at this time.At this point, virtual unit forms a virtual biography
Sensor, user can operate the virtual-sensor by user application terminal, including parameter configuration, acquisition data, deposit
Store up data etc..
Similarly, terminal node operating system is in virtual perception equipment chained list, the correspondence of new registration one sensor 12
The information of sensor 12 is assigned to the virtual perception facility information of new registration by virtual perception equipment 14, will in sensor 12
Init function addresses are assigned to the Init function access ports of virtual unit 14, and Read function addresses are assigned to virtual unit 14
Write function addresses are assigned to the Write function access ports of virtual perception equipment 14 by Read function access ports.More than
Step completes the registration of the sensor 12 newly added in, realizes the flexible access of sensor 12.When being operated to sensor 12
When, operating system finds the virtual perception facility information 14 of new registration in virtual perception equipment chained list, and operation is virtual
Init functions complete the initialization to sensor 14；Virtual Write functions are run, just complete the write operation to sensors A；Operation
Virtual Read functions, are thus completed to sensor read operation.After the virtual device driver operation, software access procedure is completed,
Sensor 12 can be used normally at this time.
The above is only the preferred embodiment of the present invention, it is noted that those skilled in the art exist
On the premise of not departing from the principle of the invention and technical solution, several improvements and modifications can also be made to this, these are improved and profit
Decorations also should be regarded as protection scope of the present invention.
Claims (3)
1. a kind of sensor flexibility cut-in method based on Internet of Things, which is characterized in that include the following steps：
One terminal node is set, and the terminal node includes an at least flexible interface and a modal processor, the flexible interface
To correspond to the flexible sensor converting interface of the sensor accessed, an operating system is installed in the modal processor；
One coordinator and a user application terminal are set, and terminal node passes through data cable to the coordinator described in wireless connection
The application terminal is connected to the coordinator；
The sensor accessed is connected to the flexible interface of the corresponding sensor；And
The sensor is registered in the operating system；
The sensor is registered in the operating system, is included the following steps：
Create a virtual-sensor equipment chained list；
A virtual unit is registered in the virtual-sensor equipment chained list, the virtual unit includes virtual device information interface
And virtual drive interface；
Obtain corresponding sensor information and sensor driver by access sensor；And
The sensor information is assigned to the virtual device information interface, and the sensor driver is assigned to institute
State virtual drive interface.
2. the sensor flexibility cut-in method based on Internet of Things as described in claim 1, which is characterized in that the virtual unit
Information includes species, model and the function of the virtual unit, the virtual drive interface include an initialization function access port,
One reading function access port and one write function access port；Species of the sensor information of the sensor including the sensor,
Model and function；The sensor driver includes a sensor initializing function, a sensor reads function and a sensing
Device writes function.
3. the sensor flexibility cut-in method based on Internet of Things as described in claim 1, which is characterized in that by the sensor
Driver is assigned to the virtual drive interface, including：By the address assignment of the sensor initializing function to described first
Beginningization function access port；The sensor is read into the address assignment of function to the reading function access port；And by the sensing
The address assignment that device writes function writes function access port to described.
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| CN108900997B (en) * | 2018-07-10 | 2020-11-24 | 常州信息职业技术学院 | Method for detecting industrial process equipment chain by using distributed wireless sensor network |
| CN111385320A (en) * | 2018-12-28 | 2020-07-07 | 深圳市云海物联科技有限公司 | Method and device for expanding Internet of things system |
| CN110166291A (en) * | 2019-05-17 | 2019-08-23 | 贵州航天智慧农业有限公司 | A kind of multi-protocols device management method based on single port |
| CN110380913A (en) * | 2019-08-19 | 2019-10-25 | 贵州航天智慧农业有限公司 | A kind of multi-protocols device management method and system based on single port |
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| CN102427417A (en) * | 2011-12-08 | 2012-04-25 | 北京工业大学 | System and method for remotely controlling Internet of things access equipment |
| CN102905281A (en) * | 2012-11-01 | 2013-01-30 | 江苏科技大学 | Wireless sensing network (WSN) combined sensing device and working method thereof |
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| CN101631394A (en) * | 2009-08-21 | 2010-01-20 | 华东理工大学 | Multi-interface coordinator of wireless sensor network |
| CN102427417A (en) * | 2011-12-08 | 2012-04-25 | 北京工业大学 | System and method for remotely controlling Internet of things access equipment |
| CN102905281A (en) * | 2012-11-01 | 2013-01-30 | 江苏科技大学 | Wireless sensing network (WSN) combined sensing device and working method thereof |
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