CN104901990A - Sensor flexible access system based on internet of things and flexible access method thereof - Google Patents
Sensor flexible access system based on internet of things and flexible access method thereof Download PDFInfo
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Abstract
The invention relates to sensor flexible access system based on internet of things. The sensor flexible access system comprises at least one sensor, at least one terminal node, at least one user application terminal and at least one coordinator; the terminal node comprises at least one flexible joint. The invention relates to a sensor flexible access method based on the Internet of things. The method comprises the steps as follows: setting one terminal node, one coordinator and one user application, connecting the accessed sensor to the flexible joint corresponding to the sensor; registering the sensor in an operating system of the terminal node. The advantage of the invention is that the system and the method realize compatibility of different sensing equipment such as sensors and terminal module on soft hardware because the sensors in different types with different uses can be accessed additionally on the terminal nodes of the current internet of things. The sensor flexible access technology based on the internet of things provided by the invention is economical, efficient, reliable, excellent expansibility and compatibility.
Description
Technical field
The present invention relates to the flexible connecting system of a kind of transducer based on Internet of Things and flexible cut-in method thereof.
Background technology
Technology of Internet of things development rapidly, has become the world information industry third wave after computer internet and mobile radio communication.The Future Information developing direction of countries in the world and strategy, all from different directions to Internet of Things lean on into.
Internet of Things roughly can be divided into three layers, sensing layer, network layer and application layer.Internet-of-things terminal node is as the equipment being in Internet of Things pyramid bottom, serve as data acquisition, preliminary treatment transforms, to the effect of upper layer transport, it is the key equipment in Internet of Things, by conversion and the collection of internet-of-things terminal, by various external sensible tidal data recovering and process, and data could be transferred in the Internet by various communication modes.Therefore the development level of Internet of Things largely depends on research and development and the application level of internet-of-things terminal.
Internet-of-things terminal equipment is the core composition of Internet of Things perception.The simple function terminal that current traditional internet-of-things terminal is mostly the application for a certain specific area and develops, the general external interface of this Terminal Type is less, only meet the part expansion of single application or single application, except this application, when without being applied in other occasions when hardware modifications, function modifications and expansion etc. can not be carried out with application change, versatility and compatible poor, govern use and the popularization of internet-of-things terminal equipment.
Summary of the invention
The invention provides the flexible connecting system of a kind of transducer based on Internet of Things and flexible cut-in method thereof, efficiently solve the technical problems such as the sensor interface existed in prior art is less, acquisition data class is single, poor compatibility.
For solving the problem, the invention provides following technical scheme:
The flexible connecting system of transducer based on Internet of Things, comprises at least one transducer, a terminal node, a telegon and a user application terminal;
Described transducer, for gathering the environmental data around described transducer;
Described user application terminal, for entering the operating instructions and showing described environmental data;
Described terminal node, for obtaining described environmental data from described transducer and sending described environmental data to described telegon;
Described telegon, for obtaining described environmental data from described terminal node, transmitting described environmental data to described user application terminal, and transmits described operational order to described terminal node;
Described terminal node comprises:
At least one flexible interface, for obtaining described environmental data from described transducer;
One modal processor, for carrying out format conversion processing to described environmental data; And
One node wireless communication module, for transmitting described environmental data to described telegon, and transmits described operational order to described modal processor;
Described telegon comprises a telegon communication module, for obtaining described environmental data, transmits described operational order to described terminal node; Described telegon communication module is corresponding with described node wireless communication module, realizes exchanges data with communication;
Described transducer is connected to described terminal node by described flexible interface, and described terminal node is connected to described telegon with communication, and described telegon is connected to described user application terminal by data wire.
Further, described flexible interface is the flexible sensor translation interface of corresponding described transducer, and each transducer is connected to the flexible interface corresponding with it.
Further, described operational order comprises and arranges instruction and the reading command for reading described environmental data for what arrange described flexible interface.
Further, described telegon communication module and described node wireless communication module are all 2.4G wireless communication module.
The invention still further relates to the flexible cut-in method of a kind of transducer based on Internet of Things, comprise the steps:
Arrange a terminal node, described terminal node comprises at least one flexible interface and a modal processor, and described flexible interface is the flexible sensor converting interface of the transducer that correspondence is access in, and is provided with an operating system in described modal processor;
Arrange a telegon and a user application terminal, terminal node described in wireless connections, to described telegon, connects described application terminal to described telegon by data wire;
The transducer be access in is connected to the flexible interface of corresponding described transducer; And
Described transducer is registered in described operating system.
Further, in described operating system, register described transducer, comprise the steps:
Create a virtual-sensor equipment chained list;
In described virtual-sensor equipment chained list, register a virtual unit, described virtual unit comprises virtual unit information and virtual drive interface;
Obtain the corresponding sensor information and the transducer driver that are access in transducer; And
Give described virtual unit information by described sensor information assignment, and give described virtual drive interface by described transducer driver assignment.
Further, described virtual unit information comprises the kind of described virtual unit, model and function, and described virtual drive interface comprises an initialization function access port, and reads function access port and and write function access port; The sensor information of described transducer comprises the kind of described transducer, model and function; Described transducer driver comprises a sensor initializing function, function read by a transducer and function write by a transducer.
Further, give described virtual drive interface by described transducer driver assignment, comprising: by the address assignment of described sensor initializing function to described initialization function access port; The address assignment described transducer being read function to described in read function access port; And the address assignment described transducer being write function to described in write function access port.
The invention has the advantages that, a kind of flexible connecting system and flexible cut-in method thereof are provided, transducer flexibility is accessed to internet-of-things terminal node.Existing internet-of-things terminal node additionally can access the transducer of dissimilar, different purposes, achieve different sensor awareness apparatus and the compatibility of terminal module on software and hardware.The present invention realizes the flexible access technology of transducer based on Internet of Things by a kind of economy, efficient, reliable mode, and favorable expandability, compatibility are good.
Accompanying drawing explanation
Fig. 1 is the structural representation based on the flexible connecting system of the transducer of Internet of Things in the present invention;
Fig. 2 is the flow chart based on the flexible cut-in method of the transducer of Internet of Things in the present invention;
Fig. 3 is the method flow diagram registering described transducer in the present invention in the operating system of terminal node;
Fig. 4 is the transducer registration process schematic diagram of new access in the present invention.
Embodiment
Describe the specific embodiment of the present invention in detail below in conjunction with accompanying drawing, those skilled in the art is more clearly understood and how to realize the present invention.Although should be appreciated that and the invention describes its preferred specific embodiments, but these are the elaboration to embodiment, instead of limit the scope of the invention.
As shown in Figure 1, the present invention relates to the flexible connecting system of a kind of transducer based on Internet of Things, comprise at least one transducer 1, terminal node 2, telegon 3 and a user application terminal 4; Wherein, transducer 1 is for gathering the environmental data around described transducer; User application terminal 4 is for entering the operating instructions and showing described environmental data, and described operational order comprises and arranges instruction and the reading command for reading described environmental data for what arrange described flexible interface; Terminal node 2 is for obtaining described environmental data from described transducer and sending described environmental data to described telegon; Telegon 3 for obtaining described environmental data from described terminal node, transmitting described environmental data to described user application terminal, and transmits described operational order to described terminal node.
Terminal node 2 comprises:
At least one flexible interface 21,22, for obtaining described environmental data from described transducer;
One modal processor 23, for carrying out format conversion processing to described environmental data; And
One node wireless communication module 24, for transmitting described environmental data to described telegon, and transmits described operational order to described modal processor;
Telegon 3 comprises a telegon communication module 31, for obtaining described environmental data, transmitting described operational order to terminal node 2; Telegon communication module 31 is corresponding with node wireless communication module 24, realizes exchanges data with communication.
The CC2530 type processor that modal processor 23 is produced for Texas Instruments; Flexible interface 21,22 is the flexible sensor translation interface (the corresponding different types of transducer of different types of conversion interface) of corresponding described transducer, this flexible sensor interface is provided for the self-defined GPIO pin that is connected with transducer 11 and power pins, according to access transducer 1(transducer 11) difference, the self-defined pin of different flexible converting interfaces is set.After setting the flexible interface of internet-of-things terminal node 2, just can start different transducers to be connected in internet-of-things terminal joint 2.Transducer 11,12 is connected to terminal node 2 by flexible interface 21,22, and each transducer is connected to the flexible interface corresponding with it, and transducer 11 is connected to flexible interface 21, and transducer 12 is connected to a flexible interface 22.Telegon communication module 31 and node wireless communication module 24 are all 2.4G wireless communication module, radio-frequency antenna and power amplifier is utilized to realize data transmit-receive, terminal node 2 is connected to telegon 3 with communication, telegon 3 will be ordered and data packing generates corresponding wireless request bag, be sent to terminal node 2; Described environmental data packing is generated wireless respond packet by terminal node 2, is sent to telegon 3, realizes exchanges data between terminal node 2 and telegon 3 with wireless request bag, wireless respond packet form.Telegon 3 is connected to user application terminal 4 by RS232 serial port data line, and user application terminal 4 sends serial ports request bag to telegon 3, and telegon 3 returns serial ports respond packet to user application terminal 4.
After transducer 11 hardware components has accessed, also need to utilize software to obtain the driver of transducer 11,12.In the operating system of terminal node, create a virtual-sensor equipment chained list, in this virtual unit chained list, there is the interface of various types of virtual unit information interface and driver, wherein, the interface of described virtual unit information interface and described driver exists with the form of function pointer, for realizing the access of transducer driver, the function pointer of described interface is only needed to point to corresponding driver, after all drivers and facility information access of transducer, just in virtual unit chained list, a virtual unit is defined, the operation to transducer of any application layer is afterwards all the operation to this virtual unit.
The flexible connecting system of a kind of transducer based on Internet of Things of the present invention, by transducer by can normally work after flexible interface connecting system.By the method for transducer by flexible interface connecting system, comprise hardware access and software access, refer to and hereafter illustrate.At work, user is by after the transmit operation instruction of user application terminal 3, operational order is sent to telegon 4 by serial port data line by user application terminal 3, and described operational order comprises and arranges instruction and the reading command for reading described environmental data for what arrange described flexible interface.Corresponding response is made in the order that telegon 1 sends according to user terminal, and order is changed into wireless communication data frame, sends to each terminal node 2 by communication, and terminal node 2 can resolve the order of wherein each kind and data after receiving data.When user send be for arrange described flexible interface instruction is set time, according to this instruction sensors configured 11, terminal node 2 transfers the driver of respective sensor 11 type, realizes the wireless telecommunications with transducer 11 by the communication succession corresponding with this transducer 11 type and communication instruction; When user send be reading command for reading described environmental data time, terminal node 2 sends the data read command of transducer 11 after resolving instruction, wait for transducer 11 return data.Transducer 11 is by after described wireless network return data, and terminal node 2 therefrom parses required data according to corresponding sensor communication data format, and constructs wireless data packet, is sent to telegon 4; After telegon 4 receives data, result is changed into the data communication protocol between telegon and application terminal, after end application detects the data that telegon 4 sends, the data of transducer and specifying information are presented to user by user application terminal 3, and user just obtains data.
Subordinate list 1
| Address | Sensor type code | Function code | Data (optional) |
| 2 bytes | 1 byte | 1 byte | N byte |
See subordinate list 1, this table is the command format of user terminal to the serial ports request bag of telegon, its communication mode is that serial ports RS232 communicates, wherein address is divided into two kinds, telegon address and terminal node address, telegon address is fixed as 0x0000, and terminal node address is from 0x0002 to 0xFFF0,0x0001 is default addresses for use, and 0xFFFF is broadcast address; Sensor type code refers to that the flexibility that will operate is linked into title, the type code of the transducer of terminal node; Function code is used for representing the order code name of user operation, and 0x00 represents initializing sensor, and 0x01 represents and arranges transducer, 0x02 represents read sensor data, 0x03 represents complicated order, and 0x04 represents and checks the operating state of telegon, and 0x06 represents and wakes terminal node up.Data bit is the operand relevant with order, and the several number of different command operations is different.
Subordinate list 2
| Length | Node address | Sensor type code | Function code | State | Data (optional) |
| 1 byte | 2 bytes | 1 byte | 1 byte | 1 byte | N byte |
See subordinate list 2, this table is the command format of telegon to the serial ports response data packet of user terminal, and wherein, length position refers to that telegon return data total length comprises certainly in interior; Node address refers to the address of the tag contact sending these data; Sensor type code, with table 1, represents title, the type code of the transducer of operation; The effect of function code is with table 1; State is used for representing the result of command execution, and 0xFE represents failure, and 0xFF represents and runs succeeded.Data are used for representing the data of the request of returning, and different command is different.
Subordinate list 3 telegon is to the command format of the wireless request packet of terminal node
| Prefix | Sensor type code | Node ID | Function code | Data (optional) |
| 1 byte | 1 byte | 1 byte | 1 byte | N byte |
See subordinate list 3, this table is the command format of telegon to the wireless request packet of terminal node, and wherein prefix is used for realizing the retransmission mechanism of data, often sends and once adds 1, and whether what be used for judging receiving is the data of repetition.Sensor type code function is with table 1 and table 2; Node ID is used for representing the address of terminal node that will operate; Function code is used for representing different operational orders, and function is identical with subordinate list 1; Data bit effect is identical with subordinate list 1, command operation data, and different command operating data is below different, and some order does not have operand.
Subordinate list 4 terminal node is to the command format of the wireless data respond packet of telegon
| Prefix | Sensor type code | Node ID | Function code | Mode bit | Data bit (optional) |
| 1 byte | 1 byte | 1 byte | 1 byte | 1 byte | N byte |
See subordinate list 4, this table is the command format of terminal node to the wireless data respond packet of telegon, and what wherein prefix was used for judging whether sending is same data, and initial value is 0, just on original basis, adds 1 after receiving a secondary data afterwards at every turn.Sensor type code function is identical with subordinate list 1; Node ID, function code returns with to send over request command the same, and meaning is too; Mode bit is used for representing request command executing state, if 0xFE represents perform failure, runs succeeded if 0xFF then represents.Data bit is used for representing the data of command request.
As shown in Figure 2, the invention still further relates to the flexible cut-in method of a kind of transducer based on Internet of Things, comprise the steps:
Step S1) terminal node is set, described terminal node comprises at least one flexible interface and a modal processor; Described flexible interface is the flexible sensor converting interface that correspondence is access in transducer, is provided with an operating system in described modal processor; Described modal processor is the CC2530 type processor that Texas Instruments produces, and described operating system is the OSAL real time operating system in Zigbee protocol stack that CC2530 type processor is corresponding.
Step S2) telegon and a user application terminal are set, terminal node described in wireless connections, to described telegon, connects described application terminal to described telegon by data wire;
Step S3) transducer be access in is connected to the flexible interface of corresponding described transducer; And
Step S4) in described operating system, register described transducer.
Wherein, on this flexible sensor interface, be provided for the self-defined GPIO pin that is connected with transducer and power pins, different according to the environment sensing equipment of access, the self-defined pin of different flexible converting interfaces is set.Described transducer, described terminal node, described telegon and described user application terminal are with above the flexible connecting system of described a kind of transducer based on Internet of Things is identical, and its internal structure is without the need to repeating.Above-mentioned steps 1)-3) be hardware access part in the present invention, step 4) is software access part, namely utilizes software to obtain the driver of transducer 11,12.
As shown in Figure 3, in described operating system, register described transducer, comprise the steps:
Step S401) in described operating system, create a virtual-sensor equipment chained list; Described virtual-sensor equipment chained list may be used for storing different types of sensor information and the variety classes transducer driver corresponding with it;
Step S402) in described virtual-sensor equipment chained list, register a virtual unit, described virtual unit comprises virtual unit information and virtual drive interface; Described virtual unit information comprises the kind of described virtual unit, model and function, and described virtual drive interface comprises an initialization function access port, and reads function access port and and write function access port; The sensor information of described transducer comprises the kind of described transducer, model and function; Described transducer driver comprises a sensor initializing function, function read by a transducer and function write by a transducer;
Step S403) obtain the corresponding sensor information and the transducer driver that are access in transducer; User can obtain sensor information and the transducer driver of this transducer by official's data (as documents such as transducer specifications) of consulting transducer, then it is inputed to the operating system of described terminal node by user application terminal; The sensor information of described transducer comprises kind, the model and function etc. of described transducer; Described transducer driver comprises a sensor initializing function, function read by a transducer and function etc. write by a transducer; And
Step S404) give described virtual unit information interface by described sensor information assignment, and give described virtual drive interface by described transducer driver assignment.
The interface of various types of virtual unit information interface and driver is had, to store the sensor information and the transducer driver that are access in transducer in virtual unit chained list.Wherein, the interface of described virtual unit information interface and described driver exists with the form of function pointer, only needs the function pointer of described interface to point to the access that corresponding driver can realize transducer driver.After all drivers and facility information access of transducer, just in virtual unit chained list, a virtual unit is defined, this virtual unit is identical with the transducer be access in, and the operation to transducer of any application layer is after this all the operation to this virtual unit.
Give described virtual drive interface by described transducer driver assignment, comprising: by the address assignment of described sensor initializing function to described initialization function access port, perform virtual initialization function; The address assignment described transducer being read function to described in read function access port, perform and virtually read function; And the address assignment described transducer being write function to described in write function access port, perform and virtually write function.Certainly, described transducer driver also may comprise other can perform function, dissimilar according to transducer, and its concrete driver is also different.
Such as, as shown in Figure 4, after determining the transducer be access in, determine the sensor information corresponding with it and transducer driver by official's data of consulting transducer 11, its driver comprises initialization function, reads function, writes function etc.Terminal node operating system is in virtual perception equipment chained list, new registration one is to should the virtual perception equipment 13 of transducer 11, by the sensor information assignment of transducer 11 to the virtual unit information of new registration, transducer driver is substituting to virtual device driver.Specifically, transducer driver is substituting to virtual device driver, refers to, in an operating system, by Init function (sensor initializing function) address assignment to the Init function access port (initialization function access port) of virtual unit 13, perform virtual initialization function; By Read function (function read by transducer) address assignment to the Read function access port (reading function access port) of virtual unit 13, perform and virtually read function; By Write function (function write by transducer) address assignment to the Write function access port (writing function access port) of virtual perception equipment 13, perform and virtually write function; .Completed the registration of the transducer 11 newly added by above step, achieve the flexibility access of transducer 11.In time will operating transducer 11, operating system finds the virtual perception facility information 13 of new registration in virtual perception equipment chained list, and operation virtual I nit function completes the initialization to transducer 13; Run virtual Write function, just complete the write operation to transducer 13; Run virtual Read function, complete thus transducer read operation.Described virtual drive interface obtains described transducer driver, and after described virtual device driver runs, software access procedure completes, and now transducer 11 can normally use.Now, virtual unit forms a virtual-sensor, and user can be operated this virtual-sensor by user application terminal, comprises parameter configuration, obtains data, stores data etc.
In like manner, terminal node operating system is in virtual perception equipment chained list, new registration one is to should the virtual perception equipment 14 of transducer 12, by the information assignment of transducer 12 to the virtual perception facility information of new registration, in transducer 12, by Init function address assignment to the Init function access port of virtual unit 14, by Read function address assignment to the Read function access port of virtual unit 14, by Write function address assignment to the Write function access port of virtual perception equipment 14.Completed the registration of the transducer 12 newly added by above step, achieve the flexibility access of transducer 12.In time will operating transducer 12, operating system finds the virtual perception facility information 14 of new registration in virtual perception equipment chained list, and operation virtual I nit function completes the initialization to transducer 14; Run virtual Write function, just complete the write operation to sensors A; Run virtual Read function, complete thus transducer read operation.After described virtual device driver runs, software access procedure completes, and now transducer 12 can normally use.
The above is only the preferred embodiment of the present invention; should be understood that; those skilled in the art are under the prerequisite not departing from the principle of the invention and technical scheme, and can also make some improvements and modifications to this, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (8)
1., based on the flexible connecting system of transducer of Internet of Things, it is characterized in that, comprise at least one transducer, a terminal node, a telegon and a user application terminal;
Described transducer, for gathering the environmental data around described transducer;
Described user application terminal, for entering the operating instructions and showing described environmental data;
Described terminal node, for obtaining described environmental data from described transducer and sending described environmental data to described telegon;
Described telegon, for obtaining described environmental data from described terminal node, transmitting described environmental data to described user application terminal, and transmits described operational order to described terminal node;
Described terminal node comprises:
At least one flexible interface, for obtaining described environmental data from described transducer;
One modal processor, for carrying out format conversion processing to described environmental data; And
One node wireless communication module, for transmitting described environmental data to described telegon, and transmits described operational order to described modal processor;
Described telegon comprises a telegon communication module, for obtaining described environmental data, transmits described operational order to described terminal node; Described telegon communication module is corresponding with described node wireless communication module, realizes exchanges data with communication;
Described transducer is connected to described terminal node by described flexible interface, and described terminal node is connected to described telegon with communication, and described telegon is connected to described user application terminal by data wire.
2., as claimed in claim 1 based on the flexible connecting system of transducer of Internet of Things, it is characterized in that, described flexible interface is the flexible sensor translation interface of corresponding described transducer, and each transducer is connected to the flexible interface corresponding with it.
3. as claimed in claim 1 based on the flexible connecting system of transducer of Internet of Things, it is characterized in that, described operational order comprises and arranges instruction and the reading command for reading described environmental data for what arrange described flexible interface.
4., as claimed in claim 1 based on the flexible connecting system of transducer of Internet of Things, it is characterized in that, described telegon communication module and described node wireless communication module are all 2.4G wireless communication module.
5., based on the flexible cut-in method of transducer of Internet of Things, it is characterized in that, comprise the steps:
Arrange a terminal node, described terminal node comprises at least one flexible interface and a modal processor, and described flexible interface is the flexible sensor converting interface of the transducer that correspondence is access in, and is provided with an operating system in described modal processor;
Arrange a telegon and a user application terminal, terminal node described in wireless connections, to described telegon, connects described application terminal to described telegon by data wire;
The transducer be access in is connected to the flexible interface of corresponding described transducer; And
Described transducer is registered in described operating system.
6., as claimed in claim 5 based on the flexible cut-in method of transducer of Internet of Things, it is characterized in that, in described operating system, register described transducer, comprise the steps:
Create a virtual-sensor equipment chained list;
In described virtual-sensor equipment chained list, register a virtual unit, described virtual unit comprises virtual unit information interface and virtual drive interface;
Obtain the corresponding sensor information and the transducer driver that are access in transducer; And
Give described virtual unit information interface by described sensor information assignment, and give described virtual drive interface by described transducer driver assignment.
7. as claimed in claim 6 based on the flexible cut-in method of transducer of Internet of Things, it is characterized in that, described virtual unit information comprises the kind of described virtual unit, model and function, and described virtual drive interface comprises an initialization function access port, and reads function access port and and write function access port; The sensor information of described transducer comprises the kind of described transducer, model and function; Described transducer driver comprises a sensor initializing function, function read by a transducer and function write by a transducer.
8. as claimed in claim 6 based on the flexible cut-in method of transducer of Internet of Things, it is characterized in that, give described virtual drive interface by described transducer driver assignment, comprising: by the address assignment of described sensor initializing function to described initialization function access port; The address assignment described transducer being read function to described in read function access port; And the address assignment described transducer being write function to described in write function access port.
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