CN205299727U - Electric heater controlling means based on zigBee technique - Google Patents

Abstract

The utility model discloses an electric heater controlling means based on zigBee technique, which comprises a master control chip, input at main control chip sets up zigBee coordinator and CC2530 radio frequency module, set up the sensor on the electric heater in every house, the zigBee wireless sensor node is connected with the sensor that corresponds, the zigBee wireless sensor node passes through wireless connection and is connected with zigBee coordinator and CC2530 radio frequency module, output at main control chip sets gradually ethernet chip and PC control central device, the utility model discloses transmit the singlechip for STM32 with measuring ambient temperature, smog equisignal, STM32 carries out intelligence to these data to be handled, then control is made in the give -out order. Data transmit the surveillance center to through wireless sensor network simultaneously, and the surveillance center carries out analysis processes to these data, and the security personnel monitors people's electric heater in service behavior through these data, have strengthened the modernized information management of electric heater use and have improved work efficiency.

Description

A kind of electric heater based on ZigBee technology controls device

Technical field

This utility model relates to automatic control control technology, and especially a kind of electric heater based on ZigBee technology controls device.

Background technology

Along with the development of science and technology, people are more and more higher to the requirement of quality of life, while pursuing comfortable life, it is most important that the life security of people. When 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 while people often have ignored safety. The electric heater sold on the market, is all mechanical mostly, the only simple functions of on an off, does not meet the safety criterion that electrical equipment uses completely. Particularly when people sleep at night time, often open electric heater for a long time, this results in that electric heater temperature is too high and initiation fire, brings great potential safety hazard to the life of people and property. The electric heater equipment of a kind of intelligence is designed in order to solve this phenomenon.

Owing to multi-line brings more potential safety hazard can to the use of electric heater, and use also inconvenient, it is contemplated that wireless technology is applied in the middle of data transmission. And ZigBee technology is with advantages such as its low-power consumption, low cost, low rates in conventional wireless technology, becomes one of the most very powerful and exceedingly arrogant wireless communication technology, be widely used in the various fields such as home intelligence, Industry Control. Nowadays electric heater is all mechanically actuated mostly, and is all built upon on the basis that cable connects, and often volume and power consumption are big, add the risk that electric heater uses, more and more inadaptable current in real time, continuously, work for a long time.

Summary of the invention

Technical problem to be solved in the utility model is: provide a kind of simple in construction, and the electric heater based on ZigBee technology of working stability controls device, to overcome the deficiencies in the prior art.

This utility model is achieved in that

A kind of electric heater based on ZigBee technology controls device, including main control chip, input at main control chip arranges ZigBee coordinator and CC2530 radio-frequency module, the electric heater in every house arranges sensor, ZigBee wireless sensor node connects with corresponding sensor, ZigBee wireless sensor node is connected with ZigBee coordinator and CC2530 radio-frequency module by radio connection, and the outfan at main control chip sets gradually Ethernet chip and PC Surveillance center device.

Aforesaid a kind of electric heater based on ZigBee technology controls in device, and described main control chip adopts STM32F103ZET6 as core main body, utilizes the wireless star-network topological structure of ZigBee in main control chip multiple sensor information to be passed in main control chip.

Aforesaid a kind of electric heater based on ZigBee technology controls in device, and described sensor includes temperature sensor and Smoke Sensor.

Owing to have employed technique scheme, compared with prior art, the signals such as the ambient temperature of measurement, smog are passed to STM32 single-chip microcomputer by this utility model, and these data are carried out Intelligent treatment by STM32, then send instruction and make control. Data are transferred to Surveillance center by wireless sensor network simultaneously, and these data are analyzed processing by Surveillance center, and people's electric heater service condition is monitored by Security Personnel by these data. Before fire, Security Personnel can hurry to the scene and carry out informing and carrying out fire fighting measure in time, provides safeguard greatly to the life security of people and property, strengthens the modernization information management of electric heater use and improves work efficiency.

Accompanying drawing explanation

Accompanying drawing 1 is structural framing figure of the present utility model;

Accompanying drawing 2 is wireless sensor gateway protocol conversion illustraton of model in this utility model;

Accompanying drawing 3 is coordinator networking flow chart in this utility model;

Accompanying drawing 4 is STM32 structured flowchart in this utility model;

Accompanying drawing 5 is power module circuitry figure in this utility model;

Accompanying drawing 6 is ethernet gateway schematic diagram in this utility model;

Accompanying drawing 7 is button and the LED circuit schematic diagram of display on PC Surveillance center device in this utility model;

Accompanying drawing 8 is sensor catenation principle figure more than STM32 in this utility model;

Accompanying drawing 9 is control software design flow chart in this utility model;

Accompanying drawing 10 is NC network coordination device node software flow chart in this utility model.

Detailed description of the invention

Embodiment of the present utility model: a kind of electric heater based on ZigBee technology controls device, as shown in Figure 1, including main control chip 1, input at main control chip 1 arranges ZigBee coordinator and CC2530 radio-frequency module 2, the electric heater in every house arranges sensor 3, ZigBee wireless sensor node 4 connects with corresponding sensor 3, ZigBee wireless sensor node 4 is connected with ZigBee coordinator and CC2530 radio-frequency module 2 by radio connection, and the outfan at main control chip 1 sets gradually Ethernet chip 5 and PC Surveillance center device 6.

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 to pass in main control chip by multiple sensor information, and this sensor 3 includes temperature sensor and Smoke Sensor.

The principle of the present embodiment is: the protocol converter that the ZigBee integrated information gateway in this enforcement row is built upon in application layer, connects ZigBee wireless network and Ethernet, and its wireless sensor gateway protocol conversion model is as shown in Figure 2. The data collected are sent to gateway according to ZigBee communication agreement by ZigBee sensor node, ZigBee coordinator node on gateway is responsible for the payload of resolution data, then transfers to STM32 processor control Ethernet card chip ENC28J60 to be responsible for transmitting data on Ethernet.

The workflow of ZigBee integrated information gateway is: first set up a ZigBee-network by the ZigBee coordinator node that is incorporated in gateway, end sensor node can ZigBee-network in automatic search volume, join after finding in this network.When remotely monitoring computer needs the data obtaining some sensor node, it is only necessary to send corresponding node address and control instruction to Ethernet interface. After gateway obtains the instruction of remote computer by Ethernet interface, ZigBee coordinator will be passed through and send control instruction to corresponding sensor node. The data of sensor are just beamed back along the rightabout of source path after receiving order and are remotely monitored computer by sensor node.

Particular hardware designs

One, ZigBee wireless sensing network design

1, the selection of ZigBee wireless network topology structure

ZigBee-network supports starlike, tree-shaped and netted three kinds of network topology structures, is star-network respectively successively, sets (bunch) shape network and mesh network. These three network topology structure is compared, and for star-network, child node completely can be battery-powered, and what power consumption was relatively larger just only has coordinator one; And for tree-shaped with mesh network, its coordinator and multiple router are required for substantial amounts of electric energy; In reliability, due to the simple in construction of Star Network, child node directly communicates with coordinator; Other two kinds of networks to pass through route and transmit, once routing node paralysis, the communication that child node will lose with 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 the design be under the environment of residential quarter by designing the temperature that collects, the information such as smog verify feasibility and some key propertys of designed system, lay the first stone for research further from now on, therefore do not need too complicated network design. So the design selects Star Network as the topological structure of wireless sensor network, realize radio warmer Design of Monitoring and Control System.

2, the establishment of ZigBee wireless network

Coordinator node networking flow process is as it is shown on figure 3, after FFD coordinator unit is activated, the efficient channel first carrying out physical layer is given tacit consent to carries out energy scan, to detect that may be present network overlapped and PANID conflict interference. And the channel detected is carried out channel sequence by energy value. Then perform active scan process to select unique 16 PANID, set up the network of oneself. After a new network is established, ZigBee router and terminal unit 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 finding network, node selects a father node to propose networking request according to the acquired network information, and waits the request response of father node. After father node receives the application that networks, the judgement that will be made whether to allow to add network according to solicited message, if allowing to add, then father node sends request response, notifies child node. Child node distributes to its 16 network address as the unique identity in network using obtaining a father node after receiving request response, and so far node is successfully joined this network. So being distributed by the network address of one-level level, all nodes in network area are by the network structure of composition certain forms.

3, Star Network set up and the realization communicated

The temperature of collection, smog information data are sent to monitoring calculation machine by Ethernet with CC2530 coordinator by the design, verify the feasibility of native system with this, and coordinator adopts the realization of Star Network and each inter-node communication. CC2530 coordinator sets up a new network by NLMENETWORKFORMATIONrequest primitive: after coordinator powers on, first initializtion protocol stack, then the peak energy of each candidate channel is carried out detecting scanning to MAC layer by Internet by sending MLMESCAN primitive, result is returned by MLMESCANconfirm primitive, and coordinator utilizes this information to select suitable channel.After selecting suitable channel, then 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 have selected PAN identifier, just illustrate to have been set up network, now Internet management entity sends MLMESTART primitive to MAC layer and brings into operation new network, hereafter the ZigBee equipment that can allow terminal node is connected, accept the data of each node of they transmission, and be transmitted to monitoring PC process by Ethernet. If there being 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, primitive comprises needs scanning channel parameter and sweep time parameter, after Internet receives primitive, to MAC layer send MLME_SCAN_request primitives MAC layer perform active scan. The beacon that MAC layer is not zero upon receipt of effective length in scanning process, MLME_BEACON_NOTYFY_indication primitive will be sent to Internet, Internet sends NLME_NETWORK_DISCOVEIW_confirm primitive to application layer after receiving primitive, after receiving this primitive, namely application layer obtains current contiguous network condition, selects a network to add. Then NLME_JOIN_request primitive is sent, the network PAN identifier parameter being intended to add is set, then Internet is used for connecting network to MAC layer transmission MLME_ASSOCIATE_request primitive, if successful connection, Internet will receive MLME_ASSOCIATE_confirm primitive and confirm network successful connection, and the new equipment connected is increased in adjacency list, then Internet sends MLME_JOIN_confirm primitive to application layer, and terminal unit is successfully joined network. After terminal acquisition node adds network success, the beacon that namely it sent by coordinator realizes Tong Bu with coordinator, starts to gather respective data value by the cycle, and transfers data to coordinator.

Two, STM32 flush bonding module design

System be the STM32 microprocessor STM32F103ZET6 to be internally integrated ethernet mac is core, ethernet control chip ENC28J60, net mouth transformer H1102NC, memorizer SD card, and the module such as display module and data acquisition forms. Structure is as shown in Figure 4.

It it is that a kind of ZigBee radio warmer based on STM32 kernel monitors system due to what design herein, it is achieved the communication issue of ZigBee wireless network and Ethernet. Gateway mainly exists in ZigBee-network in the way of coordinator, and the Ethernet interface again through STM32 is sent to Surveillance center. Therefore STM32 module can be reduced to data acquisition module, power module, controls module and key-press module.

STM32 workflow is data acquisition module and CC2530 coordinator transmits data to STM32 process, transfers data to PC again through ethernet controller ENC28J60, it is achieved the monitor in real time to the information such as indoor temperature, smog.

Three, the Hardware Design

The hardware platform of system is the STM32 series processors STM32F103ZET6 to be internally integrated ethernet mac is core, and temperature sensor, Smoke Sensor, ethernet control chip ENC28J60 and CC2530 are the module compositions such as ZigBee radio receiving transmitting module. Utilize serial UART bus communication between ZigBee radio sensing network coordinator CC2530 and STM32 embedded ethernet gateway, constitute radio warmer and control system.

1, the hardware designs of ZigBee coordinator

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

For building a complete ZigBee coordinator, peripheral circuit needs 32MHz crystal oscillator XTAL1 to provide clock source, radio frequency part to need high-precision inductance (L321, L331, L341), electric capacity (C341) and PCB microwave transmission line to mate the impedance of RF input and output for internal microprocessor. Wherein 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.

1, crystal oscillator design: two clock crystal oscillators of CC2530 job demand, first is 32MHz, provides clock for wireless receiving and dispatching; Second is 32.068KHz, provides clock for sleep pattern. C191 and C211 is 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, it is ensured that the generation frequency of crystal oscillator 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: being made up of electric capacity C341 and inductance L341, L33l, L321 and PCB microwave transmission line, total meets the requirement of RF input/output 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 (such as portable digital photographing unit), it is possible to ensureing the output electric current of 150mA, extremely low drain voltage, output voltage precision is 0.01V. Input voltage range is 4 ~ 10V, output voltage range 2.5 ~ 5V. Practical application is selected LP2985-3.3V voltage stabilizing chip. Circuit diagram See Figure 5.

2), UART serial interface circuit design

In order to realize the communication of sensor network coordinator and Ethernet, the data collected by coordinator are transferred to monitoring calculation machine by Ethernet, must design UART serial interface circuit. 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), debugging interface circuit design

Having the downloader interface circuit of ten pins on coordinator node circuit board, be used for the debugging that downloads, wherein Pin3 and Pin4 is downloading wire, and Pin1 is PWR(3.3V power supply), Pin2 is GND(ground connection), Pin8 is that RESET(resets). All the other interfaces are the I/O mouths of extension. The interface corresponding to CC2530 is respectively as follows:

Pin5:RXD0-CC2530P1_5;

Pin6:RXD0-CC2530P1_4;

Pin7:RXD0-CC2530P1_6;

Pin9:RXD0-CC2530P1_7;

2, the hardware designs of ethernet gateway

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

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

1), debugging interface circuit design

Having program debugging interface circuit on STM32 embedded ethernet gateway circuit plate, downloaded debugging by J-LINK emulator, wherein Pin1 is SWDCLK, Pin2 be SWDIO, Pin3 is GND(ground connection). The interface corresponding to STM32F103ZET6 is respectively as follows: PA13 46 foot, PA14 49 foot.

3, lcd touch controller

The design adds the FSMC interface of STM32 to drive LCD screen, use touch screen controller detection contact coordinate. Realize the situation of networking is dynamically shown by liquid crystal display screen in real time, and touch input controls networking. STM32 chip controls liquid crystal display screen and touch screen by driving chip. The design uses ILI9341 chip controls liquid crystal display screen, by TSC2046 chip controls touch screen.

Touch screen often supports the use with liquid crystal display screen, 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 ultimate principle of touch screens is dividing potential drop, and it is made up of one layer or two-layer resistive material, a termination reference voltage Vref of resistive material, other end ground connection, forms a uniform electric field along coordinate direction. When touch screen is squeezed, resistive material contacts with lower electrode, and resistive material is divided into two parts, thus at the voltage of touch point, reflect the distance of touch point and the Vref end of resistive material, and be linear relationship, and the voltage of this contact can be recorded by ADC. Change direction of an electric field, in the same way, can record the coordinate of other direction.

4, button and LED

In order to facilitate the debugging of software, the design have employed 3 LED and carrys out instruction program running status, by the pattern by key assignments ZigBee networking. That PE5 and PE6 connects respectively is KEY1 and KEY2, and low level detection is effectively. PC3, PC4, PC5 meet LED1, LED2, LED3 respectively, and when I/O port is to low level, LED is bright. Its schematic diagram is as shown in Figure 8.

5, STM32 and acquisition module hardware circuit

The signal such as temperature, smog is carried out Real-time Collection mainly through STM32ZET6 by the design, and the data gathered are analyzed. When electric heater works long hours, causing that temperature is too high, exceed safe temperature range, STM32 will send alert notification user. If user not when or when sleeping soundly, after a period of time reports to the police, alerts user will be taken measures by the Security Personnel of Surveillance center. If there is fire, it is abnormal that smoke alarm can collect smog in time, and informs adjacent node users by Zigbee network, is uploaded to Surveillance center simultaneously. Multiple safety measures ensure that the use of electric heater, all brings guarantee to the life of people and property. The schematic diagram of this part is as shown in Figure 8.

For better showing annexation and the application of device in this enforcement row, a set of software matched with device in this enforcement row is adopted to specifically describe,

Four, the software design of system

1, STM32 electric heater controlling software design

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

As it is shown in figure 9, when temperature is not in safety range, will report to the police and inform the user that; When smog occurs abnormal, it is likely to catch fire, at this moment STM32ZET6 is by controlling relay, it is achieved the power-off of electric heater, but is likely to have fire so to notify that Security Personnel rushes towards on-the-spot fire extinguishing in time.

2, ZigBee coordinator software design

The design has used Z Stack2006 protocol stack that TI company provides free as the development platform of CC2530 coordinator, the exploitation of Z Stack2006 protocol stack is mainly to the amendment applying 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, and can be added the state of network and requester network, MAC layer and physical layer does not need to change by calling interface function yet.

1), the workflow of ZigBee coordinator

First CC2530 is initialized after powering on by ZigBee radio sensing network coordinator, then creating a wireless network, a selected PANID, as the network identity of coordinator, creates routing table, then externally issuing broadcast frame, notice sensor node can add this network. Fashionable when there being child node application to add, distribute address for each child node. The data gathered are sent to STM32 processor by UART, Ethernet card chip ENC28J60 transmit data on Ethernet. Network coordinator node software flow is as shown in Figure 10.

Five, the overall test of system

1, the overall test of system

In order to verify the performance of system, carry out some tests, acquire the indoor temperature of electric heater, smog information. Concrete steps and test result are as follows:

1) establishment of platform, is debugged

In the middle of debugging, building of hardware platform is realized by 3 wireless terminal devices. The combined debugging of the design completes completely at the scene. By the signal processing gathered, whether the checking wireless network transmission correctness of data, stability and monitoring PC can carry out correct management to the data collected. House temperature adopts the temperature sensor TISC506 of configuration in ZigBee wireless terminal module to gather. The hardware of whole system adopts following collocation: 3 wireless terminal devices, and one of them is the network coordinator of the design, and another is the wireless senser child node of network, adopts STM32 and ethernet controller to realize function.

2), system test

After creating the software and hardware of whole system, it is by the debugging every design objective with checking system of entirety with that.

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

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

(1) sent the parameter of A/D sampling to coordinator 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 tidal data recovering to coordinator node is uploaded to STM32 gateway system carry out data process, and upload to Surveillance center.

(2) result shown through the data result and STM32 gateway ethernet communication that contrast each terminal node sensor acquisition, it has been found that the two result is consistent, it was demonstrated that the transmission of this gateway data is accurately. And the working condition of electric heater can accurately be judged, program is stable.

Six, sum up and look forward to

As a kind of brand-new Information acquisition technology, ZigBee radio sensing network has the advantage being different from other acquisition of information means, as supported without fixing equipment, can rapid deployment, simultaneously have be prone to networking, not by the constraint etc. of cable network. In sensor network, gateway is most important for the monitoring of sensor network, and carrying out information processing with feedback control is the most important function of sensor network gateway.

The design application by wireless sensor network, using indoor electric warmer as application, devises the ZigBee wireless sensing monitoring system based on STM32 processor, completes the hardware principle design of the electric heater I/O module based on ZigBee technology; Having carried out the overall software design of system by the analysis to Zigbee protocol stack the application in conjunction with CC2530, completed the CC2530 communication to Ethernet data, STM32 is to indoor temperature, smog real time information sampling. Achieve and the data collected are carried out Real-time Monitor Management. The finally test to designed system row, has basically reached target, has had good using value.

The description of such scheme is the utility model being understood that for ease of those skilled in the art and using. Embodiment obviously easily can be made various amendment by person skilled in the art. Therefore, this utility model is not limited to above-mentioned solid yardage case, and those skilled in the art should within protection domain of the present utility model according to method of the present utility model, the improvement made without departing from this utility model category and amendment.

Claims (3)

1. the electric heater based on ZigBee technology controls device, including main control chip (1), it is characterized in that: the input at main control chip (1) arranges ZigBee coordinator and CC2530 radio-frequency module (2), the electric heater in every house arranges sensor (3), ZigBee wireless sensor node (4) connects with corresponding sensor (3), ZigBee wireless sensor node (4) is connected with ZigBee coordinator and CC2530 radio-frequency module (2) by radio connection, outfan at main control chip (1) sets gradually Ethernet chip (5) and PC Surveillance center device (6).

2. a kind of electric heater based on ZigBee technology according to claim 1 controls device, 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 multiple sensor information to be passed in main control chip.

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