RFXCOM RFXtrx433 Spezifikationen PDF herunterladen (Seite 13)

Chapter 2. Related Work/Fundamentals 6

and take a picture of him. However, such disturbances can be prevented by simulating

activities in the house by switching lights on and oﬀ or by making noises.

These examples demonstrate the diversity of HA, by showing only a small part of all possibilities.

Technical innovations and an expanding product range will reduce limitations step by step and

enable its users to allow their dreams to come true.

2.2.2. Structure

HA systems consists of many diﬀerent devices, which can be connected by using diﬀerent technolo-

gies. Each node can range between simple, pre-programmed behaviour and sophisticated built-in

intelligence. They can be classiﬁed in the following three categories:

Sensors: Sensors can sense changes or actions in the environment. After optional processing,

they pass the information to other devices. Typical sensors are: Motion sensors, cameras,

humidity sensors, temperature sensors.

Actuators: Actuators can inﬂuence the state of their surroundings. They retrieve their actions

from a paired sensor or logic device. Examples are: Shutter motors, power switches, light

dimmers, heaters.

Logic: Logic can interpret actions from sensor data and actuators’ states and construe actions

from them. Examples are: computers and heater controls.

Sensors

Actuators

switch1 remote1

light1

shutter1

switch2

light2

motion

sensor

light3

switch1 remote1

light1 shutter1

switch2

light2

BUS

System 1 System 2

Figure 2.2.: Two HA systems with diﬀerent topologies: The left one is a loosely connected system,

where each transmitter is assigned to only one or two receivers. The right system

uses a bus network that connects the devices bidirectionally to each other.

Diﬀerent components of HA systems rely on diﬀerent network technologies, which normally operate

decentralized. The amount of connections depends on the technology used. Figure 2.2 shows two

diﬀerent systems: The left system is loosely connected, as each sensor is assigned to only one or

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 94 95

Keine Kommentare

RFXCOM RFXtrx433 Spezifikationen Seite 13