Driven by the wave of smart homes, various traditional household electrical appliances in our daily lives have been labeled “smart†by manufacturers, such as smart scales, smart patch panels, smart routers, and smart desk lamps. However, it seems that the intelligence of one thing has not been widely valued. It is the floor.
According to foreign media reports, a U.S. company called Elizabeth Redmond has developed a Powerleap smart floor. The main function of this product is to use the principle of pressure sensing to generate electricity according to the user's stampede. At present, the floor has been tested at Heathrow Airport in London, UK.
It is understood that each inch of the Powerleap floor is equipped with an electromagnetic sensor, which uses the pressure and micro-deformation generated by people walking or running to generate electromagnetic induction and generate electricity. The inventor Laurence Kemball-Cook said in an interview with the media that every step the user takes on the floor generates a power output of 7 watts, which can be stored in a battery or on the home grid for subsequent use. In addition, the unassuming Powerleap is actually expensive. According to Elizabeth Redmond, the cost per square meter costs about US$ 1,600 (more than RMB 10,000).
Another smart home product similar to Powerleap is the GravitySpace floor from the Hasso Plattner Institute in Potsdam, Germany. This floor can sense the contact and pressure of the object with the floor, and then use intelligent algorithms to determine the user's position and posture, and analyze whether there is a user falling or falling.
GravitySpace's prototype was equipped with a 6.4cm-thick glass plate and below it was an infrared camera and a layer of rubber-wrapped pressure-sensitive film. Every tiny contact between the object and the floor triggers the light deflection between the infrared light and the pressure sensitive film. The camera below captures and creates the footprint image in real time. After accurate analysis by computer algorithms, it can determine whether the user is standing still. Sitting, falling or walking.
Researchers said that GravitySpace's remote monitoring capabilities will have a very broad market as the population of the entire society ages more and more. Users can monitor the movement and wrestling of the elderly at home through the Internet and smart phones.
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The main function of the PWM Solar Controller is to manage the charging and discharging process between solar panels and batteries in solar power generation systems. It is a traditional charge controller that controls the charging voltage and current through pulse width modulation technology to maintain the charging state of the battery and protect the battery.
Main effect:
Charging control: PWM Solar Controller controls the charging voltage and current through pulse width modulation technology to ensure that the battery is charged at an appropriate voltage and current to prolong the service life of the battery.
Overcharge protection: The PWM Solar Controller can monitor the charging status of the battery, and when the battery is fully charged, it will automatically stop charging to avoid battery damage caused by overcharging.
Over-discharge protection: PWM Solar Controller can monitor the discharge state of the battery. When the battery power is lower than a certain level, it will automatically stop discharging to avoid battery damage caused by over-discharge.
Differences from other charge controllers:
Modulation technology: PWM Solar Controller uses pulse width modulation technology to control the charging and discharging voltage and current to maintain the charging state of the battery. In contrast, MPPT Solar Controller uses maximum power point tracking technology to adjust the output voltage and current of solar panels in real-time to achieve maximum power output.
Energy conversion efficiency: Compared with the MPPT Solar Controller, the energy conversion efficiency of the PWM Solar Controller is lower. Because the pulse width modulation technology cannot adjust the operating point of the Solar Panel in real-time, the output power of the solar panel may not be maximized.
Application Scenario: PWM Solar Controller is a traditional charge controller suitable for small-scale, low-power solar power generation systems. The MPPT Solar Controller is suitable for larger-scale, high-power solar power generation systems to improve energy utilization efficiency.
Overall, the main role of the PWM Solar Controller is to manage the charging and discharging process in the solar power generation system and protect the battery from damage. Compared with MPPT Solar Controller, it uses traditional pulse width modulation technology, and the energy conversion efficiency is lower. Suitable for small-scale, low-power solar power generation systems. The MPPT Solar Controller uses maximum power point tracking technology, which can improve the energy utilization efficiency of solar panels, and is suitable for larger-scale, high-power solar power generation systems.
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