Technology
Mitsubishi Electric Engineering developed a batteryless, wireless sensor system that utilizes
oscillation generation. The system consists of an oscillation generator that
uses spring and a control board that incorporates sensor and radio unit. The
generator amplifies imperceptible vibrations by virtue of the resonance of the
spring and collects electricity. The company exercised its ingenuity to allow
the spring to generate electricity even with a small number of vibrations. The
new sensor is maintenance-free and long-life because replacing batteries is not
required.
The test model
generates feeble electricity even with vibrations of less than 10 Hz. The
sensor measures such data as lighting intensity, temperature, and humidity with
generated electricity and sends them through the control board. The company
simplified the circuit design to curb power consumption. The test model employs
the intermittent control that sends a signal for every 10 seconds. The company
developed this sensor for the remote control in places where human cannot work
with safety, such as on the ocean and on the steel tower. It has not decided
whether or not the new sensor is produced on a commercial basis, but the test
model can be build at less than 100,000 yen. The company is now checking the
responses from the market to explore its marketability.
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