INCREASING HOME SECURITY
Ing. Gustavo Marín Sánchez, MSc
Intelligent sensors are revolutionizing sensor technology by adding features such as wireless communication, integrated microcontroller and other functions, which greatly increase the degree of reliability and safety in the home.
Intelligent sensors can be used to solve virtually any sensing application including safety applications and solutions for industrial and home use, creating the perfect basis for reliable and efficient control of processes and for protecting people from accidents.
These sensors can communicate with each other and with a central station wirelessly. The installation is very simple because they work on batteries, so it is enough to fix them in the desired place by means of screws or a simple tape with contact paste.
These sensors can work independently or can create "networks" of communication between them or with a central station, sending, receiving and sharing information on the status of each one of them. Unlike "traditional" sensors that do not make decisions regarding the measured parameters, the "Smart Sensors" can intervene in the sampling process of the variables, even modifying the characteristics of the measured values, for this, some of them they incorporate microcontrollers and other devices.
An intelligent sensor, then, is a device that can perform a number of intelligent functions, including self-testing, calibrating and adapting to the measurement conditions. Some of the functions they can perform are: amplification, analog and digital signal processing, and wireless communication. Intelligent sensor are, self-learning and self-adapting devices that can obey commands and instructions from a central station, and are capable of controlling themselves and other appliances
We can then say that an intelligent sensor is a combination or integration of a sensor, an analog interface circuit, an analog-to-digital converter or A / D converter, a bus interface and all wireless connectivity in a single unit or chip
Conventional sensors suffer from a number of shortcomings such as: their characteristics change over time, that is, they do not maintain accuracy and other characteristics, they have little or no ability to adapt to changes in the environment, most of them require a "hardware" or circuit for the conditioning of the signal needed in the control applications and generally need to be close to the circuits or units responsible for receiving their signals
Intelligent sensors, on the other hand, can self-calibrate and perform a series of tests to verify the reliability of the measurements, for example if the values are within the expected parameters, compare with previous readings or other sensors and make decisions about them