A bouncing backpack is more comfortable to carry and generates electricity.
With a shock-absorbing backpack, the electricity it generates can power LEDs and other devices, and it is easy to carry. It works like a car’s suspension when the bag is worn, and the impact needs to be minimized.
The bag hangs on the sliding rails; with the help of the rails, the pair moves the household system up and down with a rubber rope. It reduces the amount of electricity by 21% through the contents of the pack jiggling pack.
How does a power-generating backpack work?
In China, Jia Cheng of Tsinghua University says, “As the body moves, the center of mass moves up and down,” which developed the prototype with its peers. A standard bag runs with this mass centre, but the pulley system cancels this movement, then the relative motion of the bag and the body uses the Triboelectric Nanogenerator (TENG). This converts mechanical energy into electricity.
The TENG of the bag can convert 14% of the bag’s movement into electrical energy when worn while walking. The team was capable of using it in fluorescent lights, electric diodes, or an electric watch.
To lighten the system, the energy efficiency of the TENG further improves.
“It’s a very exciting step forward for electronic devices and green electronics without electricity,” said Chan Hwang at the University of Edinburgh Napier in the UK. “In TENG’s energy capability to lighten the system, he would like to see more improvements,” said Chan Hwang as the present version weighs 3 kg.
“This model is actually a bit heavy, but I think we can reduce the weight in the future as well as improve the power density performance and use in real life,” says Chiang. He also agrees on both objectives. He hopes to carry the next version to 1kg.
Power bags for military use in different countries
The US Office of Naval Research initially approached Rome was contracted to develop a bag that could generate electricity from the movement of the wearer’s body (see bag produces a mighty punch). The military has found that soldiers have always relied heavily on electronic devices such as GPS systems, night vision sites, and computers, meaning they replace batteries with food and medical equipment. For the soldiers, the ONR was looking for a way to increase their power.
Rome says, “It wasn’t the best way with heel colloid devices the way people are trying to do it, my knowledge of biomechanics made me recognize it.” In which the skimming action between the load and the frame of the bag generates electricity alternately. This mechanism also reduced the body’s power, which they doubted, and this idea gave birth to a new ergonomic bag that further developed. To bring the bag to market, Rome has formed a company called Lightning Pack.
A robot squid propels itself through the water with rhythm.
The robotic squid that moves to a rhythm can match real animal power performance, a tactic that could be useful in designing the next generation of submarines. They use their fins carefully, and the whole squid has small fins. When they have to move forward and tear at high speed, they suck and drain the water.
To build robots, researchers have tried to mimic things like jets. At the University of Southampton in the UK, Gabriel Weymouth now leads a team that has found a way to improve its performance.
Eight 3D printed plastic ribs on a robotic squid covered with rubber skin
Weymouth and his colleagues developed an umbrella-like robot with eight 3D-printed plastic ribs covered with rubber skirts. It flexes outwards to suck in the water and contracts to get it out, which provides forcing. The researchers experimented with operating the robot at a range of different opening and closing frequencies, comparing its energy input and output to measure its efficiency.
On the natural mechanism of the machine, they found that firing to move water pulses is 100 times more efficient, at which the robot naturally tends at higher or lower speeds; in nature, the ablest squid found matching. Weymouth says, “It is absolutely a sweet spot and a lot better.
The robotic squid can benefit from its elastic body.
By operating in this sweet spot, the robotic squid can take advantage of its flexible body to shut down and help its next force, similar to how pushing someone on a swing at just the right moment makes them swing slightly higher each time. Previous research has shown that many animals adopt a similar strategy of using natural resonances to improve their movement.
With less risk for future submarines and wildlife, Weymouth hopes the design can be changed more efficiently, as the apparatus will be soft, unlike props. “There isn’t really any use of propellers,”he says.They plan to upgrade the robot because the present version can only go in a straight line.
Smart speakers could hear your heart beating from across the room.
By accidentally bouncing ultrasound waves, the computer can measure your pulse to detect the tiny chest movements caused by your heart pumping and from your body and analyzing the reflection. This system can one day run on home smart speaker devices.
Heartbeat monitoring with smart speakers
Heartbeat monitoring plays an essential role in patient care and medical diagnosis, a common practice among medical professionals. To monitor these signals, dedicated equipment is continuously used. For monitor, the heartbeat, electrocardiograms (ECG) with 3-12 electrodes are attached to the target’s chest.
In Beijing, at the Chinese Academy of Sciences University, researchers and the University of Massachusetts Amherst at a frequency of 48 kHz used a laptop connected to a speaker to send ultrasound chips. Then, to record the heartbeat, they used a standard microphone.