Tài liệu Sensors in Intelligent Buildings P2 pptx

view). Nevertheless, in terms of industrial applications, other characteristics be￾sides the transduction principle become more important, namely technology, ma￾terials, accuracy, and costs. The insides of sensor systems become less important

from an application perspective.

All sensor systems are facing a noticeable upward trend in performance require￾ments for maintenance, down-time, reliability, fault tolerance, fault recovery, and

adaptability. Industrial applications in the area of consumer goods are also subject

to cost pressure, where the value of electronic products has risen while costs have

continuously fallen in past decades.

Current trends in sensor systems can be summarized as follows (see Figure

1.1-10):

1. Higher performance of sensors. Sensor accuracy and linearity, both classical prob￾lems of sensor systems, have been improved in all areas. Today’s sensor systems

also work under better conditions and with higher reliability. Greater demands for

environmental protection have led to the development of highly reliable sensors.

Development efforts are still focused on maintenance-free sensors with long life

expectancy and low electric power dissipation.

New sensors have been developed, such as torque sensors, accelerometers,

acoustic sensors, pattern information-sensing devices, and smell sensors. Olfac￾tory sensors and voice recognition combined with synthetic speech generation

technology will make remote-controlled home appliances a reality.

1.1 Sensors in Intelligent Buildings: Overview and Trends 19

Fig. 1.1-10 Trends in sensor systems