CN105605665A - Electric heater control device based on ZigBee technology - Google Patents

Abstract

The invention discloses an electric heater control device based on the ZigBee technology. The electric heater control device comprises a main control chip, the input end of the main control chip is provided with a ZigBee coordinator and a CC2530 radio frequency module, a sensor is arranged on an electric heater in each room, ZigBee wireless sensor nodes are connected with the corresponding sensors and connected with the ZigBee coordinator and the CC2530 radio frequency module in a wireless connection mode, and the output end of the main control chip is sequentially provided with an Ethernet network chip and a PC monitoring center device. According to the electric heater control device based on the ZigBee technology, measured environmental temperature, smog and other signals are transmitted to a single chip microcomputer STM32, and the single chip microcomputer STM conducts intelligent processing on the data and then gives out commands to conduct control; meanwhile the data are transmitted to a monitoring center through a wireless sensor network, the monitoring center conducts analysis processing on the data, security personnel conduct monitoring on the application situation of the electric heaters of people through the data, modern information management of application of the electric heaters is enhanced, and work efficiency is improved.

Description

A kind of electric heater control device based on ZigBee technology

Technical field

The present invention relates to automatic control control technology, especially a kind of electric heater control device based on ZigBee technology.

Background technology

Along with scientific and technological development, people are more and more higher to the requirement of quality of life, in pursuing comfortable life, the most important thing is people's life security. In cold weather, people can be equipped with some heaters and keep out the cold, such as air-conditioning, electric blanket, electric heater etc., enjoy these electric equipments bring warm in people often ignored safety. The electric heater of selling on the market, is all mechanical mostly, and the simple functions of only opening and closing does not meet the safety standard that electrical equipment uses completely. Particularly, in the time that people sleep at night, opening for a long time often electric heater, this just causes electric heater excess Temperature and initiation fire, has brought great potential safety hazard to people's life and property. Design a kind of electric heater equipment of intelligence in order to solve this phenomenon.

Because multi-line can bring more potential safety hazard to the use of electric heater, and use also inconvenience, so consider wireless technology to apply in the middle of transfer of data. And ZigBee technology, with advantages such as its low-power consumption, low cost, low rates, becomes one of the most very powerful and exceedingly arrogant wireless communication technology in conventional wireless technology, be widely used in the various fields such as home intelligence, Industry Control. Nowadays electric heater is all mechanically actuated mostly, and is to be all based upon on the basis that cable connects, and often volume and power consumption are large, have increased the risk that electric heater uses, more and more inadaptable in real time now, continuously, work for a long time.

Summary of the invention

Technical problem to be solved by this invention is: provide a kind of simple in structure, the electric heater control device based on ZigBee technology of working stability, to overcome the deficiencies in the prior art.

The present invention is achieved in that

A kind of electric heater control device based on ZigBee technology, comprise main control chip, at the input of main control chip, ZigBee telegon and CC2530 radio-frequency module are set, on the electric heater in every house, sensor is set, ZigBee wireless sensor node connects with corresponding sensor, ZigBee wireless sensor node is connected with ZigBee telegon and CC2530 radio-frequency module by wireless connections mode, sets gradually Ethernet chip and PC Surveillance center device at the output of main control chip.

In aforesaid a kind of electric heater control device based on ZigBee technology, described main control chip adopts STM32F103ZET6 as core main body, utilizes the wireless star-network topological structure of ZigBee in main control chip that multiple sensor information is passed in main control chip.

In aforesaid a kind of electric heater control device based on ZigBee technology, described sensor comprises temperature sensor and Smoke Sensor.

Owing to having adopted technique scheme, compared with prior art, the signal such as environment temperature, smog of measurement is passed to STM32 single-chip microcomputer by the present invention, and STM32 carries out Intelligent treatment to these data, then sends instruction and makes control. Data are transferred to Surveillance center by wireless sensor network simultaneously, and Surveillance center is to these data analysis processing, and Security Personnel monitors people's electric heater service condition by these data. Before fire, Security Personnel can hurry to the scene and inform and carry out in time fire fighting measure, provides safeguard greatly to people's life security and property, has strengthened the modernization information management of electric heater use and has improved operating efficiency.

Brief description of the drawings

Accompanying drawing 1 is structural framing figure of the present invention;

Accompanying drawing 2 is wireless sensor gateway protocol conversion illustratons of model in the present invention;

Accompanying drawing 3 is telegon networking flow charts in the present invention;

Accompanying drawing 4 is STM32 structured flowcharts in the present invention;

Accompanying drawing 5 is power module circuitry figure in the present invention;

Accompanying drawing 6 is ethernet gateway schematic diagrams in the present invention;

Accompanying drawing 7 is the button of display and LED circuit schematic diagrams on PC Surveillance center device in the present invention;

Accompanying drawing 8 is remaining sensor catenation principle figure of STM32 in the present invention;

Accompanying drawing 9 is in the present invention, to control software flow pattern;

Accompanying drawing 10 is NC network coordination device node software flow charts in the present invention.

Detailed description of the invention

Embodiments of the invention: a kind of electric heater control device based on ZigBee technology, as shown in Figure 1, comprise main control chip 1, at the input of main control chip 1, ZigBee telegon and CC2530 radio-frequency module 2 are set, sensor 3 is set on the electric heater in every house, ZigBee wireless sensor node 4 connects with corresponding sensor 3, ZigBee wireless sensor node 4 is connected with ZigBee telegon and CC2530 radio-frequency module 2 by wireless connections mode, sets gradually Ethernet chip 5 and PC Surveillance center device 6 at the output of main control chip 1.

Wherein this main control chip 1 adopts STM32F103ZET6 as core main body, utilizes the wireless star-network topological structure of ZigBee in main control chip that multiple sensor information is passed in main control chip, and this sensor 3 comprises temperature sensor and Smoke Sensor.

The principle of the present embodiment is: the ZigBee integrated information gateway in this implementation column is the protocol converter being based upon in application layer, connects ZigBee wireless network and Ethernet, and its wireless sensor gateway protocol conversion model as shown in Figure 2. ZigBee sensor node is sent to gateway by the data that collect according to ZigBee communication protocol, ZigBee coordinator node on gateway is responsible for the payload of resolution data, then transfers to STM32 processor Control ethernet the core of the card sheet ENC28J60 to be responsible for data to send on Ethernet.

The workflow of ZigBee integrated information gateway is: first set up a ZigBee-network by the ZigBee coordinator node being incorporated in gateway, the ZigBee-network in end sensor node meeting automatic search space, joins after finding in this network. In the time that remote monitoring computer need to obtain the data of some sensor nodes, only need to send corresponding node address and control instruction to Ethernet interface. Gateway obtains by Ethernet interface after the instruction of remote computer, will be by ZigBee telegon to corresponding sensor node sending controling instruction. After sensor node receives orders, just the data of sensor are beamed back remote monitoring computer by the rightabout along source path.

Particular hardware design

One, ZigBee wireless sensing network design

1, the selection of ZigBee wireless network topology structure

ZigBee-network is supported starlike, tree-shaped and netted three kinds of network topology structures, is respectively star-network successively, tree (bunch) mesh network and mesh network. These three kinds of network topology structures are compared, and concerning star-network, child node completely can be battery-powered, and what power consumption was larger just only has one of telegon; And for tree-shaped and mesh network, its telegon and multiple router all need a large amount of electric energy; In reliability, simple in structure due to Star Network, child node directly and telegon communicate; Other two kinds of networks will pass through route transmission, once routing node paralysis, child node will lose and the communicating by letter of host node; Star Network propagation delay time is less than peer-to-peer network; The most important thing is that Star Network cost is lower. The design selects star network.

To sum up analyze, consider that the design verifies feasibility and some key propertys of designed system under the environment of residential quarter by designing the information such as temperature, smog collecting, for further research from now on lays the first stone, therefore do not need too complicated network design. So the design selects the topological structure of Star Network as wireless sensor network, realize radio warmer Design of Monitoring and Control System.

2, the establishment of ZigBee wireless network

As shown in Figure 3, after FFD coordinator unit is activated, the efficient channel that first carries out physical layer to give tacit consent to carries out energy scan to coordinator node networking flow process, disturbs to detect the network overlapped and PANID conflict that may exist. And the channel detecting is carried out to channel sequence by energy value. Then carry out active scan process to select 16 unique PANID, set up the network of oneself. After a new network is established, ZigBee router and terminal device just can join this network and suffer.

After new network is set up, all other nodes (FFD or RFD) all send as the child node in network the request of networking, find the network in its communication range. If find network, node selects a father node to propose networking request according to the obtained network information, and waits for the request response of father node. Father node is received one and is networked after application, by make the judgement that whether allows to add network according to solicited message, adds if allow, and father node sends request response, notice child node. Child node receives after request response, will obtain 16 network address that a father node distributes to it as the unique identify label in network, and so far node successfully adds this network. Distribute by the network address of one-level level like this, all nodes in network area are by the network structure of composition certain forms.

3, the establishment of Star Network and the realization of communicating by letter

The design sends to supervisory control comuter by the temperature of collection, smog information data by Ethernet with CC2530 telegon, the feasibility of verifying native system with this, and telegon adopts the realization of Star Network and each inter-node communication. CC2530 telegon is set up a new network by NLMENETWORKFORMATIONrequest primitive: after telegon powers on, first initializtion protocol stack, then Internet detects scanning to MAC layer to the peak energy of each candidate channel by sending MLMESCAN primitive, result is returned by MLMESCANconfirm primitive, and telegon utilizes the channel that this Information Selection is suitable. Select after suitable channel, set up one oneself network and select a unique indications (PAN identifier), and be written as the MACPANID attribute of MAC layer by MLME primitive. Once select PAN identifier, just network has been set up in explanation, now Internet management entity sends the MLMESTART primitive new network that brings into operation to MAC layer, after this can allow the ZigBee equipment of terminal node to be connected with it, accept the data of each node of their transmission, and be transferred to monitoring PC by Ethernet and process. If there are abnormal conditions, Surveillance center's meeting and alarm, Security Personnel just can take corresponding fire prevention measure in time, avoids the generation of fire.

After terminal node powers on, first application layer sends NLME_NETWORK_DISCOVERY primitive to Internet, in primitive, comprise needs scanning channel parameter and sweep time parameter, Internet is received after primitive, sends MLME_SCAN_request primitives MAC layer carry out active scan to MAC layer. Once MAC layer receives the non-vanishing beacon of effective length in scanning process, to send MLME_BEACON_NOTYFY_indication primitive to Internet, Internet sends NLME_NETWORK_DISCOVEIW_confirm primitive to application layer after receiving primitive, receive after this primitive, application layer has obtained the network condition of current vicinity, selects a network to add. Then send NLME_JOIN_request primitive, the network PAN identifier parameter of wanting to add is set, then Internet sends MLME_ASSOCIATE_request primitive for interconnection network to MAC layer, if successful connection, Internet will be received the successful connection of MLME_ASSOCIATE_confirm primitive confirmation network, and the new equipment connecting is increased in adjacency list, then Internet sends MLME_JOIN_confirm primitive to application layer, and terminal device successfully adds network. Terminal acquisition node adds after network success, and the beacon that it send by telegon is realized and being synchronizeed with telegon, starts to gather data value separately by the cycle, and sends data to telegon.

Two, STM32 flush bonding module design

System be STM32 microprocessor STM32F103ZET6 taking the integrated ethernet mac in inside as core, ethernet control chip ENC28J60, net mouth transformer H1102NC, memory SD card, the module compositions such as display module and data acquisition. Structure as shown in Figure 4.

Be a kind of ZigBee radio warmer monitoring system based on STM32 kernel due to what design herein, realize the communication issue of ZigBee wireless network and Ethernet. Gateway mainly exists in the mode of telegon, then be sent to Surveillance center by the Ethernet interface of STM32 in ZigBee-network. Therefore STM32 module can be reduced to data acquisition module, power module, control module and key-press module.

STM32 workflow is that data acquisition module is that CC2530 telegon sends to STM32 by data and processes, then by ethernet controller ENC28J60, data is sent to PC, realizes the real-time monitoring to the information such as indoor temperature, smog.

Three, the Hardware Design

The hardware platform of system be STM32 series processors STM32F103ZET6 taking the integrated ethernet mac in inside as core, temperature sensor, Smoke Sensor, ethernet control chip ENC28J60 and CC2530 are the module compositions such as ZigBee radio receiving transmitting module. Between ZigBee radio sensing network telegon CC2530 and STM32 embedded ethernet gateway, utilize serial UART bus communication, form radio warmer control system.

1, the hardware design of ZigBee telegon

The CC2530 chip that ZigBee coordinator module adopts TI company to produce designs, CC2530 chip not only has the 2.4GHz less radio-frequency front end that meets IEEE802.15.4 specification, and at Embedded the 8051MCU of 8, have the resources such as 8 tunnels inputs configurable 12 ADC, 4 timers, 21 programmable I/O pins.

For building a complete ZigBee telegon, peripheral circuit needs 32MHz crystal oscillator XTAL1 to provide clock source for internal microprocessor, and radio frequency part need to have high-precision inductance (L321, L331, L341), electric capacity (C341) and PCB microwave transmission line to mate the impedance of RF input and output. Wherein the serial ports pin of CC2530 (P0_2 and P0_3) is connected with UART serial ports (PA_2 and the PA_3) pin of STM32.

1, crystal oscillator design: two clock crystal oscillators of CC2530 need of work, first is 32MHz, for wireless receiving and dispatching provides clock; Second is 32.068KHz, for sleep pattern provides clock. C191 and C211 are the load capacitance of 32MHz crystal oscillator, capacitance depends on the size of load capacitance, CL=I/ (1/C191+1/C211)+Cf, and wherein CL representative value is 16pF, C puppet 2～5pF, ensure crystal oscillator generation frequency accurately and stable. So the representative value of C19l and C211 is 27pF.

2, biasing resistor design: R261 is the precision resistance of current reference generator. Its value is 43K ohm.

3, balun: be made up of capacitor C 341 and inductance L 341, L33l, L321 and PCB microwave transmission line, total meets the requirement of RF I/O impedance matching (50Q).

4, the decoupling of power supply: if decoupling capacitor C421 is for power filter, to improve the stability of chip operation.

1), power module design

That power module adopts is low-power dissipation power supply chip LP2985, and this chip is generally used for battery powered occasion (as portable digital camera), can ensure the output current of 150mA, extremely low drain voltage, and output voltage precision is 0.01V. Input voltage range is 4 ~ 10V, output voltage range 2.5 ~ 5V. In practical application, select LP2985-3.3V voltage stabilizing chip. Fig. 5 is shown in by circuit diagram.

2), UART serial interface circuit design

In order to realize communicating by letter of sensor network telegon and Ethernet, the data that collect by telegon are transferred to supervisory control comuter by Ethernet, must design UART serial interface circuit. The serial ports pin (P0_2 and P0_3) of CC2530 is connected with UART serial ports (PA_2 and the PA_3) pin of STM32.

3), debug i/f circuit design

On coordinator node circuit board, have the downloader interface circuit of ten pins, for the debugging that downloads, wherein Pin3 and Pin4 are downloading wires, and Pin1 is PWR(3.3V power supply), Pin2 is GND(ground connection), Pin8 is that RESET(resets). All the other interfaces are I/O mouths of expansion. The interface that corresponds to CC2530 is respectively:

Pin5：RXD0-CC2530P1_5;

Pin6：RXD0-CC2530P1_4;

Pin7：RXD0-CC2530P1_6;

Pin9：RXD0-CC2530P1_7;

2, the hardware design of ethernet gateway

The design adopts STMicw Electronics to produce the STM32 series processors STM32F103ZET6 of high performance ARMCortex-M3 kernel as the processor of embedded ethernet gateway. Its dominant frequency can reach 72MHz, interior high-speed memory (up to the flash memory of 128K byte and the SRAM of 20K byte), abundant enhancing I/O port and the peripheral hardware that is connected to two APB buses, the ADC that comprises 2 12,3 general 16 bit timing devices and a PWM timer, also comprise standard and advanced communication interface: reach 2 I2C and SPI, 3 USART, USB and a CAN. These abundant peripheral configuration can meet the design's needs.

Ethernet chip adopts the independent ethernet controller ENC28J60 of U.S. Microchip company, and its employing speed, is conveniently connected with STM32 processor as communication port up to the SPI interface of 10Mb/s, has greatly reduced the complexity of PCB layout. Inner integrated MAC layer and the phy controller of compatible IEEE802.3 rule of ENC28J60, its packet filtering function able to programme and high-speed SRAM buffer can receive efficiently, storage, transceiving data bag, alleviates processing and the Memory Load of STM32 processor. Wherein ethernet gateway schematic diagram as shown in Figure 6.

1), debug i/f circuit design

On STM32 embedded ethernet gateway circuit plate, have program debugging interface circuit, by the debugging that downloads of J-LINK emulator, wherein Pin1 is SWDCLK, and Pin2 is SWDIO, and Pin3 is GND(ground connection). The interface that corresponds to STM32F103ZET6 is respectively: PA13-46 pin, PA14-49 pin.

3, lcd touch controller

In the design, add the FSMC interface of STM32 to drive LCD screen, used touch screen controller to detect contact coordinate. The situation to networking on liquid crystal display that realizes dynamically shows in real time, and touches input control networking. STM32 chip is by driving chip to control liquid crystal display and touch-screen. The design uses ILI9341 chip controls liquid crystal display, by TSC2046 chip controls touch-screen.

Normal and the liquid crystal display of touch-screen supports the use, be combined into one can be mutual input-output system. Except familiar resistance, capacitance plate, the kind of touch-screen also has ultrasonic wave screen, infrared screen. The general principle of touch screens is dividing potential drop, and it is made up of one deck or two-layer resistive material, and in a termination reference voltage Vref of resistive material, other end ground connection, forms a uniform electric field along coordinate direction. In the time that touch-screen is squeezed, resistive material contacts with lower electrode, and resistive material is divided into two parts, thereby at the voltage of touch point, reflected the distance of the Vref end of touch point and resistive material, and be linear relationship, and the voltage of this contact can be recorded by ADC. Change direction of an electric field, with same method, can record the coordinate of other direction.

4, button and LED

In order to facilitate the debugging of software, the design has adopted 3 LED lamps to carry out instruction program running status, by pressing the pattern of key assignments ZigBee networking. That PE5 and PE6 connect respectively is KEY1 and KEY2, and low level detects effectively. PC3, PC4, PC5 meet respectively LED1, LED2, LED3, when IO mouth during to low level LED bright. Its schematic diagram as shown in Figure 8.

5, STM32 and acquisition module hardware circuit

The design mainly carries out Real-time Collection by STM32ZET6 to the signal such as temperature, smog, and to the data analysis gathering. When electric heater works long hours, cause excess Temperature, exceed safe temperature range, STM32 will give the alarm and notify user. If user not or sleep soundly in the situation that, after a period of time reports to the police, the Security Personnel of Surveillance center will take measures to alerts user. If there is fire, it is abnormal that smoke alarm can collect smog in time, and inform adjacent node users by Zigbee network, is uploaded to Surveillance center simultaneously. Multiple safety measures has ensured the use of electric heater, has all brought guarantee to people's life and property. The schematic diagram of this part as shown in Figure 8.

Annexation and the application of in this implementation column, installing adopt a set of software matching with device in this implementation column to specifically describe for better showing,

Four, the Software for Design of system

1, STM32 electric heater control Software for Design

The design carries out Real-time Collection by STM32ZET6 temperature and smog information to external world, and the signal of collection is compared with the scope of setting respectively, then makes corresponding operation; Upload the data to Surveillance center by Zigbee network simultaneously, facilitate Security Personnel to understand in real time each user's electric heater service condition, carry out prevention and the fire extinguishing measure of fire. Its software flow as shown in Figure 9.

As shown in Figure 9, when temperature is not in safe range, will report to the police and tell user; When extremely, being likely and having caught fire appears in smog, at this moment STM32ZET6, by control relay, realizes the power-off of electric heater, so but may have fire will notify in time Security Personnel to rush towards on-the-spot fire extinguishing.

2, ZigBee telegon Software for Design

The design's Z-Stack2006 protocol stack that TI company provides free development platform as CC2530 telegon, the exploitation of Z-Stack2006 protocol stack is mainly the amendment to application ccf layer (AF layer) and application support sublayer (APS layer), and correspondingly adds the driver of oneself; Internet is to provide with the form in storehouse, can add the state of network and requester network by calling interface function, and MAC layer and physical layer do not need to change yet.

1), the workflow of ZigBee telegon

After powering on, ZigBee radio sensing network telegon first CC2530 is initialized, then create a wireless network, a selected PANID, as the network identity of telegon, creates routing table, then externally issue broadcast frame, notice sensor node can add this network. Fashionable when there being child node application to add, for each child node is distributed address. The data that gather are sent to STM32 processor by UART, and by Ethernet card chip, ENC28J60 sends to data on Ethernet. Network coordinator node software flow process as shown in figure 10.

Five, the overall test of system

1, the overall test of system

For the performance of verification system, carry out some tests, gather indoor temperature, the smog information of electric heater. Concrete steps and test result are as follows:

1), the establishment of debug platform

In the middle of debugging, building by 3 wireless terminal devices of hardware platform realizes. The design's combined debugging completes completely at the scene. By the signal processing gathering, whether the correctness of checking wireless network transmission data, stability and monitoring PC can carry out correct management to the data that collect. House temperature adopts the temperature sensor TISC506 configuring in ZigBee wireless terminal module to gather. The hardware using of whole system is arranged in pairs or groups as follows: 3 wireless terminal devices, and one of them network coordinator that is the design, the wireless senser child node that another is network, adopts STM32 and ethernet controller practical function.

2), system testing

Creating after the software and hardware of whole system, is to carry out the every design objective of overall debugging with checking system with that.

The test of Star Network communication efficiency and Ethernet data management function.

After the star-like cordless communication network of ZigBee builds, telegon, by the control of STM32 gateway, sends control command to sensor network, and terminal node carries out data acquisition and uploads according to order.

(1) send to telegon the parameter that A/D samples by monitoring system, after the passage of sampling time interval and sampling, the parameter that sensor network nodes specifies by monitoring system starts data acquisition, and data are pooled to coordinator node upload to STM32 gateway system and carry out data processing, and upload to Surveillance center.

(2) result that the data result gathering through the each terminal node sensor of contrast and STM32 gateway ethernet communication show, finds that the two result is consistent, proves that this gateway transfer of data is accurately. And can accurately judge the working condition of electric heater, program is stable.

Six, sum up and look forward to

As a kind of brand-new Information acquisi-tion technology, ZigBee radio sensing network has the advantage that is different from other acquisition of information means, as supported without permanent plant, can rapid deployment, there is the networking of being easy to simultaneously, be not subject to the constraint etc. of cable network. In sensor network, gateway is most important for the monitoring of sensor network, and processing with FEEDBACK CONTROL to information is the most important function of sensor network gateway.

The design, by the application of wireless sensor network, using indoor electric warmer as application, has designed the ZigBee wireless sensing monitoring system based on STM32 processor, has completed the hardware principle design of the electric heater I/O module based on ZigBee technology; By the analysis to Zigbee protocol stack and carried out the overall Software for Design of system in conjunction with the application of CC2530, complete the communication of CC2530 to Ethernet data, STM32 is to indoor temperature, smog real time information sampling. The data that realized collecting are carried out Real-time Monitor Management. Finally to designed system row test, substantially reached re-set target, there is good using value.

The description of such scheme is the invention that can understand and use for ease of those skilled in the art. Person skilled in the art obviously can easily make various amendments to embodiment. Therefore, the invention is not restricted to above-mentioned solid yardage case, those skilled in the art's the method according to this invention, not departing from improvement and the amendment that category of the present invention makes all should be within protection scope of the present invention.

Claims (3)

1. the electric heater control device based on ZigBee technology, comprise main control chip (1), it is characterized in that: at the input of main control chip (1), ZigBee telegon and CC2530 radio-frequency module (2) are set, sensor (3) is set on the electric heater in every house, ZigBee wireless sensor node (4) connects with corresponding sensor (3), ZigBee wireless sensor node (4) is connected with ZigBee telegon and CC2530 radio-frequency module (2) by wireless connections mode, set gradually Ethernet chip (5) and PC Surveillance center device (6) at the output of main control chip (1).

2. a kind of electric heater control device based on ZigBee technology according to claim 1, it is characterized in that: described main control chip (1) adopts STM32F103ZET6 as core main body, utilizes the wireless star-network topological structure of ZigBee in main control chip that multiple sensor information is passed in main control chip.

3. a kind of electric heater control device based on ZigBee technology according to claim 1, is characterized in that: described sensor (3) comprises temperature sensor and Smoke Sensor.