This is an intelligent, autonomous sensor system devised for
identification and
measurement of temperature and activity in large
scale animal husbandry. The device is injected in the animal and
monitors activity and temperature. The autonomous sensor system is
powered by a small lithium battery, measures movement and temperature
by means of a thermistor and two accelerometers and stores the data in
an on-board memory. When the device is wirelessly activated the data or
identification code is transmitted to an external receiver/PC for
processing and visualization.
The figure shows the final packaged
sensor systems, the internal operations and setup of the device and the
wireless link. All electronics, including the battery and the ferrite
coil for transmission and reception, are encapsulated in a glass
capsule. The size of the final sensor system is
7.28mm by 3.05mm. The device lifetime is more than 14 months on a single battery.
