CN203070064U - Wireless sensor network monitoring node - Google Patents

Abstract

A wireless sensor network monitoring node, including a wireless processor module and a power supply module, the wireless processor module is connected to a monitoring module for data collection, and connected to a control module to realize device control, wherein the monitoring module includes an air temperature and humidity sensor, a soil moisture sensor and a soil temperature sensor; the control module includes four relays, respectively controlling irrigation equipment, ventilation fan equipment, skylight equipment and supplementary light equipment, and the power supply module supplies power for the wireless processor module, monitoring module and control module. The new model integrates monitoring and control functions. The wireless sensor network nodes can not only monitor environmental information but also control external equipment to provide a reliable platform for precise agricultural control. The utility model can choose 12V solar energy and battery power supply or 5V adapter power supply. , and the control module circuit is simple, low in cost, safe and reliable.

Description

A wireless sensor network monitoring node

technical field

The utility model belongs to the technical field of wireless sensor applications, in particular to a wireless sensor network monitoring node.

Background technique

With the development of wireless sensor network technology, wireless sensor network has been widely used in the fields of industry, commerce, medicine, consumption, military and agriculture. The wireless sensor network nodes transmit the collected surrounding environment information to the base management platform in the form of single-hop or multi-hop, and the base management platform processes and analyzes the information. At present, the wireless sensor network in the agricultural field is mainly used for real-time monitoring and collection of environmental information such as air temperature and humidity, illuminance, soil moisture, soil temperature, etc., and does not realize the control of equipment. However, the final purpose of collecting agricultural environmental information is to realize automatic and precise control of farmland equipment. Control the start and stop of fans, irrigation and other executive equipment to achieve the adjustment effect on the greenhouse environmental indicators.

Contents of the invention

In order to overcome the above-mentioned shortcomings of the prior art, the purpose of this utility model is to provide a wireless sensor network monitoring node, which has both monitoring and control functions, and is suitable for the environment of agricultural greenhouses.

In order to achieve the above object, the technical solution adopted by the utility model is:

A wireless sensor network monitoring node, including a wireless processor module and a power supply module, the wireless processor module is connected to a monitoring module for data collection, and connected to a control module to realize device control, wherein the monitoring module includes an air temperature and humidity sensor, a soil moisture sensor and a soil temperature sensor; the control module includes four relays, which respectively control irrigation equipment, ventilation fan equipment, skylight equipment and supplementary light equipment, and the power module supplies power to the wireless processor module, monitoring module and control module.

The wireless processor module adopts the CC2530 processor chip as the core, and a JTAG interface unit, a reset unit and a wireless sensor network working state indicating unit are arranged around the chip.

The four relays of the control module have the same structure, and the P0.4, P0.6, P1.6, and P1.7 ports of the CC2530 chip are respectively connected to the input ports of two TLP521 optocoupler relays. When the output of the P0.4 port is low When the level is high, the input terminal of the optocoupler relay is turned on, and then the normally open contact is turned on to make the corresponding equipment operate; when the P0. The equipment stopped working.

The power supply module is powered by a 12V battery and a 5V adapter. The power supply is selected by a toggle switch, and a stable voltage of 5V and 3.3V is provided by an AMS1117 voltage regulator chip, and the stable voltage of 3.3V is input to the positive voltage LDO regulator chip at the same time. , provide a pulse current of 2.5V/10mA for the soil temperature sensor.

Compared with the prior art, the beneficial effects of the utility model are:

(1) Integrating monitoring and control functions, wireless sensor network nodes can not only monitor environmental information but also control external devices, providing a reliable platform for precise agricultural control.

(2) The power supply is optional, you can choose 12V solar and battery power supply, or you can choose 5V adapter power supply.

(3) The circuit of the control module is simple, low in cost, safe and reliable.

Description of drawings

Accompanying drawing is a structural block diagram of the utility model.

Detailed ways

The implementation of the utility model will be described in detail below in conjunction with the accompanying drawings and examples.

As shown in the attached figure, a wireless sensor network monitoring node includes a wireless processor module and a power supply module, the wireless processor module is connected to the monitoring module for data collection, and connected to the control module to realize device control.

Among them, the wireless processor module includes a CC2530 processor chip and its peripheral circuits, a JTAG interface unit, a reset unit and a wireless sensor network working state indication unit. The CC2530 chip and its peripheral circuits are the core of the system. This chip integrates the industry-standard enhanced 8051 CPU and RF transceiver adapted to 2.4-GHz IEEE802.15.4. It only needs very few external components to meet the needs of the mesh network system. . CC2530 is a low-power series product specially designed for wireless sensor network nodes. Its power supply voltage is 2-3.6V, and this design uses 3.3V power supply. The maximum current of CC2530 in normal working mode is only 29mA. In addition, there are four low-power sleep modes that can be selected. The sleep current in the sleep mode with the lowest power consumption is only 1uA. In addition, the 12-bit ADC of 8 channels and the DMA of 5 channels make it have good data processing capability. The JTAG interface unit can be connected to a PC through an emulator to realize program download and online debugging. The reset unit is composed of a capacitor, a resistor and a light touch button RESET1 to ensure the stable operation of the node module. LED1LED3 is connected to the P1.0, P1.1 and P1.4 ports of CC2530 through resistors to indicate the working status of the wireless sensor network.

The monitoring module includes air temperature and humidity sensors, soil moisture sensors and soil temperature sensors, which mainly complete the monitoring of air temperature and humidity, soil moisture and soil temperature. The SP3 interface of CC2530 is used to connect the SHT10 air temperature and humidity sensor, the SP2 interface is used to connect the EC-5 soil moisture sensor, and the SP1 interface is used to connect the DS18B20 soil temperature sensor. The SHT10 air temperature and humidity sensor integrates a digital sensor with only four pins, namely power supply, ground, SCL, and DATA. Its power supply voltage is 2.4V-5.5V, and this design uses 3.3V power supply. The P1.2 and P0.0 ports of the CC2530 chip are connected to the 3.3V power supply through a pull-up resistor and connected to the SHT10 sensor for transmitting clock signals and data signals respectively. The EC-5 soil moisture sensor requires a periodic 2.5V/10mA power supply and is in sleep mode when not in use, reducing power consumption. The output analog signal is connected to the P0.1 port with A/D conversion function of the CC2530 chip, and the analog signal and digital signal are converted by the 12-bit A/D converter inside the CC2530 without additional A/D conversion chip, reducing cost while having reliable accuracy. The DS18B20 soil temperature sensor is a digital sensor that only needs three pins, namely power supply, ground and data output. Its power supply range is 3-5.5V. This design uses 3.3V power supply. The P1.5 port of the CC2530 chip is connected to the output of the DS18B20 soil temperature sensor and connected to the 3.3V power supply through a pull-up resistor to collect soil temperature information.

The control module includes four-way relays, which control irrigation equipment, ventilation fan equipment, skylight equipment and supplementary light equipment respectively. Through four-way relay control, irrigation, ventilation fan, skylight and supplementary light equipment can be controlled respectively. The P0.4, P0.6, P1.6, and P1.7 ports of the CC2530 chip are respectively connected to the input terminals of two TLP521 optocoupler relays. Because the four-way relay control adopts the same principle, here we only take one of the circuits as an example to illustrate: the selected relay model is SRD-5VDC-SL-C, which is a 5V weak current control relay for 220V strong current. When the P0.4 port outputs a low level, the input terminal of the optocoupler relay is turned on and then the output terminal outputs a 5V level to drive the relay drive circuit composed of a resistor and a triode. The normally open contact of the relay is turned on to drive the external equipment to operate, and the indicator light is on . When the P0.4 port outputs a high level, the optocoupler relay cannot be turned on and the relay drive circuit does not work, the normally open contact of the relay is disconnected, the external equipment stops running and the indicator light is off.

The power module supplies power to the wireless processor module, the monitoring module and the control module. The power module in this design supports 12V battery power supply and 5V adapter power supply, and can provide stable voltages of 5V, 3.3V, and 2.5V. Select the corresponding power interface through the toggle switch to select the power supply. 5V and 3.3V are provided by two AMS1117 regulator chips respectively. AMS1117 is a three-terminal linear regulator circuit with positive voltage output and low dropout voltage. It has the functions of current limiting and overheating cut-off protection. It is small in size and simple in peripheral circuits, making it an ideal choice for portable devices. Among them, the 3.3V stable voltage is input to the positive voltage LDO regulator chip at the same time to provide a pulse current of 2.5V/10mA for the soil temperature sensor. The P0.5 port of the CC2530 chip is connected to the CE pin of the positive voltage LDO regulator chip. to control its output.

The working process of the present utility model is:

The data collected by the monitoring module on the monitoring node is sent to the base management platform through the wireless processor module. The base management platform compares the data with the corresponding threshold, and sends corresponding control commands for irrigation, ventilation, ventilation or supplementary light to the monitoring node according to the comparison result , the wireless processor module drives the external device to complete the corresponding action through the control module, thereby realizing the remote communication of information and the remote control of the device.

Claims (4)

1. wireless sensor network monitor node, comprise wireless processor module and power module, it is characterized in that, wireless processor module connects monitoring modular and carries out data acquisition, connect the control of control module realization equipment, wherein, described monitoring modular comprises aerial temperature and humidity sensor, soil moisture sensor and soil moisture sensor; Described control module comprises No. four relays, controls irrigation equipment, ventilating fan equipment, day window apparatus and light filling lamp apparatus respectively, and described power module is wireless processor module, monitoring modular and control module power supply.

2. wireless sensor network monitor node according to claim 1, it is characterized in that, it is core that described wireless processor module adopts the CC2530 processor chips, is provided with a jtag interface unit, a reset unit and a wireless sensor network duty indicating member around chip.

3. wireless sensor network monitor node according to claim 2, it is characterized in that, four road relay construction unanimities of described control module, the P0.4 of CC2530 chip, P0.6, P1.6, P1.7 mouth are connected to the input end of two TLP521 light coupling relay respectively, when P0.4 mouth output low level, the conducting of light coupling relay input end, and then the normally opened contact conducting makes relevant device turn round; When P0.4 mouth output high level, light coupling relay can not conducting, and then relay normally open contact disconnects and makes relevant device shut down.

4. wireless sensor network monitor node according to claim 1, it is characterized in that, described power module adopts 12V storage battery power supply and the power supply of 5V adapter, use toggle switch to select power supply, provide 5V and 3.3V burning voltage by a slice AMS1117 voltage stabilizing chip respectively, wherein the 3.3V burning voltage is input in the positive voltage LDO adjuster chip simultaneously, and the pulse current of 2.5V/10mA is provided for soil moisture sensor.

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