zigbeeieee802154網(wǎng)絡(luò)應(yīng)用實(shí)例畢業(yè)論文外文翻譯-展示頁(yè)
2025-05-27 18:09本頁(yè)面
【正文】 ential unit on a monthly basis. An AMR can do more than simply deliver the total monthly usage data。 it can gather detailed usage information, automatically detect leaks and equipment problems, and help in tamper detection. ZigBeebased wireless devices not only perform monitoring tasks, they can manage the usage peak by municating with the appliances inside the house. For example, when there is a surge in electricity usage, a ZigBeeenabled electric water heater can be turned off for a short period of time to reduce the peak power consumption. Irrigation Systems A sensorbased irrigation system can result in efficient water management. Sensors across the landscaping field can municate to the irrigation panel the soil moisture level at different depths. The controller determines the watering time based on moisture level, plant type, time of day, and the season. A distributed wireless sensor work eliminates the difficulty of wiring sensor stations across the field and reduces the maintenance cost. Light Control Systems Light control is one of the classic examples of using ZigBee in a house or mercial building. In traditional light installation, to turn on or off the light it is necessary to bring the wire from the light to a switch. Installation of a new recess light, for example, requires new wiring to a switch. If the recess light and the switch are equipped with ZigBee devices, no wired connection between the light and the switch is necessary. In this way, any switch in the house can be assigned to turn on and off a specific light. Figure is an example of wireless connections between wall switches and lights. In our example, the lights are located in a residential building entrance, living area, and hallway. The wall switch in the entrance can turn on and off any of the four lights. The living area wall switch, in contrast, municates only with the lights in the living area. Living area lights are in close proximity to each other, and therefore a single ZigBee device can be used for both lights. The concept of using binding tables (see Section ) is applicable in the example of Figure . Wall switch 1 is logically connected to all four lights. Wall switch 2 is bound only to the lights in the living area. One of the devices in the work has the task of storing and updating the binding table. A ZigBeeenabled recess light can be more expensive than a regular recess light, but the installation cost of a ZigBeeenabled light is lower because it requires no additional wiring to a wall switch. Using wireless remotes to control the lights is not a new concept. ZigBee provides the opportunity to implement this concept on a large scale by ensuring long battery life and interoperability of products from various vendors in a reliable and lowcost work. In addition to potential cost savings, ZigBeeenabled lights can have other benefits in a house. For example, the ZigBee devices embedded in the recess lights can act as routers to relay a message across the house, or the lights can be programmed to dim whenever the television set is turned on. The ZigBee light control mechanism has been used for street light controls as well. Multizone HVAC Systems The multizone control system allows a single heating, ventilation, and airconditioning (HVAC) unit to have separate temperature zones in the
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