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To reduce the power consumption we use outdoor sensors which wake up the microcontroller with power management for the indoor ultrasonic and PIR sensors which provide a majority voting mechanism to enhance the sensing reliability.
In this paper we design and implement an embedded surveillance system by use of multi-frequency ultrasonic sensors with multiple Pyroelectric Infrared sensors (PIR). The ultrasonic sensor module consists of a transmitter and a receiver which are placed in a line; however, ultrasonic sensors with the same frequency are disturbed by crosstalk with each other and have a high miss rate. To overcome these...
In this paper we design and implement an embedded surveillance system with multiple Pyroelectric Infrared sensors (PIR) and ultrasonic sensors which turn on the embedded surveillance system according to the signals triggered by their majority voting mechanism (MVM). The PIR sensors are used to detect changes in human temperature and environment temperature, but have a high miss rate in the case of...
In this paper we design and implement a surveillance system based on an embedded system with multiple ultrasonic sensor modules to enhance the system's reliability. The ultrasonic sensor module includes a transmitter and a receiver, and they are placed in a line direction. Because the ultrasonic air transmission will spread a beam angle, we use multiple ultrasonic receivers to receive the ultrasonic...
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