Posted tagged ‘sensor’

NANO GENERATOR

August 23, 2011

01-cellphone-charger-nanogenerator

After six years of intensive effort, scientists are reporting development of the first commercially viable Nano generator, a flexible chip that can use body movements — a finger pinch now en route to a pulse beat in the future — to generate electricity.

This development represents a milestone toward producing portable electronics that can be powered by body movements without the use of batteries or electrical outlets.

The latest improvements have resulted in a Nano generator powerful enough to drive commercial liquid-crystal displays, light-emitting diodes and laser diodes. By storing the generated charges using a capacitor, the output power is capable to periodically drive a sensor and transmit the signal wirelessly.

01-nanogenerator-energize LED light and LCD display-future power generaration technologies-power production by body movement

If we can sustain the rate of improvement, the Nano generator may find a broad range of other applications that require more power.


Example:

  • Personal electronic devices powered by footsteps activating Nano generators inside the sole of a shoe;
  • Implanted insulin pumps powered by a heart beat; and
  • Environmental sensors powered by Nano generators flapping in the breeze.

01-heart-powered-pacemaker-insulin pumping by nano generator

Preparation:

The key to the technology is zinc oxide (ZnO) nanowires. ZnO nanowires are piezoelectric — they can generate an electric current when strained or flexed. That movement can be virtually any body movement, such as walking, a heartbeat, or blood flowing through the body. The nanowires can also generate electricity in response to wind, rolling tires, or many other kinds of movement.

01-concept-NanoGenerator-Zinc oxide Nano wires

The diameter of a ZnO nanowire is so small that 500 of the wires can fit inside the width of a single human hair. Scientist found a way to capture and combine the electrical charges from millions of the Nano scale zinc oxide wires. They also developed an efficient way to deposit the nanowires onto flexible polymer chips, each about a quarter the size of a postage stamp. Five Nano generators stacked together produce about 1 micro Ampere output current at 3 volts — about the same voltage generated by two regular AA batteries (about 1.5 volts each).

While a few volts may not seem like much, it has grown by leaps and bounds over previous versions of the Nano generator. “Additional nanowires and more Nano generators, stacked together, could produce enough energy for powering larger electronics, such as an iPod or charging a cell phone.”

NANO GENERATOR

August 23, 2011

01-cellphone-charger-nanogenerator

After six years of intensive effort, scientists are reporting development of the first commercially viable Nano generator, a flexible chip that can use body movements — a finger pinch now en route to a pulse beat in the future — to generate electricity.

This development represents a milestone toward producing portable electronics that can be powered by body movements without the use of batteries or electrical outlets.

The latest improvements have resulted in a Nano generator powerful enough to drive commercial liquid-crystal displays, light-emitting diodes and laser diodes. By storing the generated charges using a capacitor, the output power is capable to periodically drive a sensor and transmit the signal wirelessly.

01-nanogenerator-energize LED light and LCD display-future power generaration technologies-power production by body movement

If we can sustain the rate of improvement, the Nano generator may find a broad range of other applications that require more power.


Example:

  • Personal electronic devices powered by footsteps activating Nano generators inside the sole of a shoe;
  • Implanted insulin pumps powered by a heart beat; and
  • Environmental sensors powered by Nano generators flapping in the breeze.

01-heart-powered-pacemaker-insulin pumping by nano generator

Preparation:

The key to the technology is zinc oxide (ZnO) nanowires. ZnO nanowires are piezoelectric — they can generate an electric current when strained or flexed. That movement can be virtually any body movement, such as walking, a heartbeat, or blood flowing through the body. The nanowires can also generate electricity in response to wind, rolling tires, or many other kinds of movement.

01-concept-NanoGenerator-Zinc oxide Nano wires

The diameter of a ZnO nanowire is so small that 500 of the wires can fit inside the width of a single human hair. Scientist found a way to capture and combine the electrical charges from millions of the Nano scale zinc oxide wires. They also developed an efficient way to deposit the nanowires onto flexible polymer chips, each about a quarter the size of a postage stamp. Five Nano generators stacked together produce about 1 micro Ampere output current at 3 volts — about the same voltage generated by two regular AA batteries (about 1.5 volts each).

While a few volts may not seem like much, it has grown by leaps and bounds over previous versions of the Nano generator. “Additional nanowires and more Nano generators, stacked together, could produce enough energy for powering larger electronics, such as an iPod or charging a cell phone.”

SMART GLASS WITH SPD TECH

August 22, 2011

Electro-chromatic mirrors system:

01-electrochromatic rearview mirrors-auto dimming mirrors

Electro chromatic mirrors / Auto dimming mirrors use a combination of opto electronic sensors and complex electronics (sensors, circuit boards, micro-controllers, etc.) that constantly monitor ambient light and the intensity of light shining directly on the mirror. As soon as sensors detect glare, the electro chromatic surface of the mirror becomes darker to protect driver’s eyes and their concentration.

01-electrochromatic exterior rear view mirrors-auto dimming side view mirrors

The electro chromatic technology usually is applied to the inside rearview mirror / Side view mirror, where it basically saves you the trouble of flipping the mirror manually if blinded by the light which increases driving safety.

Working operation of Electro chromatic mirrors:

This auto dimming rearview mirror is installed on higher end vehicles. It consists of two lenses that sandwich an electro chromic (electronic color changing) gel. The inside sides of the lenses are coated with a transparent conductive layer coating and the deepest lens has a reflective coating.

01-electrochromatic rearview glare free mirrors-automatically darken by opto electronic sensor

This gel, when charged with electricity darkens, then clear once the glare is no longer detected. The mirror uses a forward sensor which measures the outside ambient light, and a rearward sensor to look for glare. When dark enough, it sends current to the electrostatic gel, darkening it a rate which is related to the level of ambient darkness and rearward glare. When the outside ambient light increases, the current decreases, until the gel is clear again at daylight light levels.

Electro chromatic auto dimming rear view mirror