Advances in technology allows electronic devices to perform a function similar to the size of an increasingly shrinking.
Recently, the site Techreview peeling a wireless computer sensor size is only one cubic millimeter. Supermini tool serves as an implant that is placed in the eyes of a patient with glaucoma disease.
Despite their small size, these electronic devices are incorporating various types of hardware, includes a processor, memory, pressure sensors, solar cells, thin film lithium battery and a transmitter.
Tools made by scientists from the University of Michigan it is useful to read the pressure in the eyes of glaucoma patients for 24 hours, and transmits the data to doctors who handle patients.
Pressure by the sensor readings taken every 15 minutes, and the device that will store them in memory, before the device is then uploading them to an external device. This means solar cells is only 0.007 square millimeters in size are constantly supplying the battery.
These solar cells must be illuminated by the sun about 1.5 hours or at least exposed to outdoor light for 10 hours.
According to engineers from the University of Michigan, Dennis Sylvester, the main challenge of this tool is not the size of the electrical circuit is very small, but his little electric power can be supplied by the battery. All components are designed to use as little electricity as possible.
Therefore, the scientists made their device with 180-nanometer processing technology, not the 32-nanometer. Therefore, the smaller the electrical circuit, the more leaks. Meanwhile, the memory cell is also designed to work on the voltage 400 millivolts, not 1 volt.
Pressure sensors only consume an average of 5.3 nanowatt. The processor works at 100 kilohertz (kHz) rather than 1 GHz as in most phones. And there is the memory has a capacity of 4 kilobits.
With the capacity of small, wireless transmitter device responsible for sending data wirelessly from memory into a larger storage area that were located 10 cm from the location of the implant tool.
Such small sensors is of course also be made for various purposes other biomedical monitoring, such as tracing the development of tumors, oversee the development of certain pollutants in the environment, or provide observation system for security purposes. (Art)
• VIVAnews
0 comments:
Post a Comment