US9605822B2 - Head of Solar Street Light - Google Patents

2. The lamp housing of the Invention is made of plastic containing tiny bubbles which has advantages of light weight, sturdy and durable structure, high temperature resistance and low cost. Due to the countless tiny bubbles in the plastic and uncirculated air inside the bubbles, the air in the bubbles will expand and spill out under high temperature and then form plural air chambers in the plastic in the process of manufacturing bubble-containing plastic. As temperature decreases, the air in the air chambers will return to normal. The extremely scarce amount of the air makes the air chambers almost in vacuum state and due to the uncirculated residual air, the plastic containing tiny bubbles will have extremely low thermal conductivity. The Invention adopts the aforementioned lamp housing made of plastic containing tiny bubbles, making the thermal conductivity of the lamp housing lower, thus preventing the temperature of the lamp housing from rising under the sunlight and conducting heat to the battery and the control system in the lamp housing.

Why isn't there any low-cost airlines for overseas travels?

Yes there is, such as Jet Star, Virgin Atlantic, Air Asia, Ryan Air, etc

How about inventing a "fuel” that will not erupt into fire?

Yes, of course, inventors and researchers have always been looking into alternative ways to power planes. Apparently none of first four power sources is used for commercial air transportation, because they are unreliable and/or limiting the range. Fission nuclear power could provide reliability and range, but radiation issues forbid the use of this technology. Fusion remains science fiction for time being.Instead, chemical fuels are used because of their very high power density, their perceived abundance, and low cost. Any power storage of high density is potentially dangerous. Just imagine a massive spring that would have enough mechanical energy stored to power a heavy long range aircraft. In case of a mechanical failure, the full amount of energy would be released in an instant. That would be just as disastrous as chemical fuel going into flames.

I need low cost LiDAR. Where i can found it? And what is the model name ?

You could try taking a laser range finder apart since they work the same way and you might be able to find a cheap used one, you could use a cheaper sensor like the one in the link below which uses IR instead of a laser but is otherwise very similar, or you could use an ultrasonic sensor like the kind made Arduino and use sound instead of light. I also wanted to add that ebay has a lot of laser range finders for around $30 which should have the sensor in them.

how can i make low cost long lasting sachets for every room in my house?

Make any kind you want, using any filler you prefer, and buy the essential oils in the scents you like. When the scent fades, add some more oil. This method makes the sachets permanent.

Low cost, moderately accurate water depth measurement

Measuring water in open channels is a basic element of water conservation. With the increasing demand for improved water management techniques, there is a serious need for low-cost and accurate water-measuring devices like flow meters & Liquid Level sensors. Ever since the development of the Parshall flume, attempts have been made to simplify the construction and improve the accuracy of water-measuring devices in open channels. The circular flume is an appropriate device for measuring flow through furrows because its circular shape fits to the natural shape of a furrow, reducing the possibility of lateral flow around the flume. The device also has been used successfully in lined and unlined canals.High costs have prevented the use of water measuring flumes by growers. However, recently a practical water measuring device has been designed that can be used by growers at low cost: the circular flume.This is just my raw information which i've shared with you, further you can also study about it

Can I get a detailed cost estimate for a low cost 2bhk?

Hi,If this is your first home and you must be very excited about your dream home. :)You can invest in property near in Thane location, 2 BHK apartment, RERA carpet area 488 sqft with best amenities.You can inquire on 9594577833

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Best Quality 60W Solar Street Light in Pakistan
Rated 5.00 out of 5 based on 3 customer ratings Rated 5.00 out of 5 based on 3 customer ratings With growing concerns on electricity shortages and keeping in view high fares, Ultronics has introduced Solar Street Lights with 60 Watts power. This solar street light is a complete solution for people choosing to move on alternate energy solutions. This solar light is built with high quality ABS Material that stands tall under tough conditions. An ideal selection for housing societies, parks, factories, mines and open warehouses this light is IP65 certified which means it is completely water proof. Back up Time: 6-8 hours (on full mode) when charged under bright sunlight1. how can i made a circuit for solar street light?You could be using leds or a compact fluoro for this. These will be for use with a 12V battery. It may be you want to reconsider using 40W, as less power is much more feasible. About 10W of CFL or LED supply will be the same as a 40W incandescant lamp, and last much longer. If using leds you will need an efficient switch mode current regulated source to drive them. You can expect similar efficiency to a compact fluorescent lamp. The leds will need heatsinks. The size of the battery and the panel are critical parts of the design. The power supply would be a 12V battery. The light runs at night only. WIth some care the solar panel itself can be used as a sensor to switch on the lights by measuring the battery voltage. When under charge it will be around 13.85V, using a float charger. The current is inherently limited by the panel. A simple but effective charger is to connect the solar panel by a switch (P channel mosfet as a high side switch or relay) when the voltage is below 13 volts and disconnect it when the voltage approaches 14V (lead acid battery). Use a reverse blocking diode with the panel. Note that gel type batteries are not very suitable for operation in sunlight in the tropics at least. When the battery is below 12.6V consider it as night time. Otherwise use a separate sensor for sunlight. Thus you have three voltage comparators for these 3 voltages. These can be a schmidt trigger with the correct hysteresis. You need a reference supply. A small 5V regulator is simple. This uses a solar panel designed for charging a 12V battery, meaning it has 36 cells. The OC voltage at standard conditions is 22V. Look up data sheets specs for panels. If the lamp runs 12h per day, and the power is 10W, then it uses 120Wh per day. With a 12V system this is 10Ah. The battery needs to be at least 10Ah, especially considering overcast days, and the need to not discharge it below 50% of capacity. This looks like a 40Ah battery therefore. The maximum charge rate should not exceed 4A (10h rate). The solar panels must provide 10Ah per day too, but... The battery takes 140% of its discharge to recharge, so now 14Ah per day. Allow extra to catch up after a period of overcast weather, at least 20Ah per day. The rated current occurs with full sun. There is an equivalent of full sun hours for your region, likely 2-5h a day. In the tropics 5h per day. Thus we need 20Ah in 5 hours, so a current of 4A. This agrees nicely with a 40Ah battery. So for a 10W lamp operating 12h a day in the tropics we need something like a 40Ah battery, and a 4 amp x 36 cell panel. This will be rated around 15V * 4A = 60W. A bigger panel is ok within reason, but should have a bigger battery so it does not charge too quickly. A bigger battery may be needed to increase the lifetime, and allow a reasonable number of days without sun if overcast weather lasts more than a day or too. The electronics should all be designed for outdoor use, vermin proof, including rats to ants, weather-proof and able to operate at 60C ambient temperature. The link below has an example of a P channel mosfet high side switch driven by a voltage comparator. Use a 10A or more rated switch and the comparator needs a reference so it turns on at 14V and off at 13V.2. All in One Solar Street Light Manufacturer with Best Price in IndiaAll In One Solar Street Lights All In One solar street light is a new-age form of lighting solution integrating solar panels, charge controller, LED light and battery. These lights are available in two varieties, with infrared motion sensors and without, as part of the unit. All In One solar street lights are becoming popular due to their compact design and multiple other advantages. Motion sensors help to adjust the LED brightness intelligently in All In One street lights. Infrared (IR) and passive infrared (PIR) motion sensors are used for motion sensed detection of emitted/reflected infrared energy. The All In One solar street lights with motion sensor switch on in the evening and after a time delay of 30 seconds, the lights automatically reduce their brightness to 20%. Motion sensor is capable of detecting infrared waves that radiate from moving objects, thereby electronically increasing the brightness of the lights. Once motion is detected, there is 100% brightness and if there is no motion detected in the area after the time delay, the light gets automatically adjusted to a dim mode of 20%. The biggest advantage of solar street lights with motion sensors is that they add a sense of security and safety to your property while providing better battery life. Features of All In One Solar Street Lights Controllers used in All In One solar street lights PWM or MPPT charge controllers are used in All In One solar street lights. PWM controller acts as a switch between the battery and solar panel. The battery is charged with constant 3-stage charging, i.e., bulk, float and absorb. Pulse width modulation or PWM is the technique to modulate the pulse width to change the voltage and frequency of energy from solar panel to charge the battery. One of the greatest pros of PWM controllers is that it helps to prevent overcharging while charging the battery. As for the cost, PWM controllers are less expensive compared to MPPT controllers. MPPT (maximum power point) controller offers an indirect connection between the battery and the solar panel. The DC/DC converter takes extra photovoltaic voltage and transforms this into additional current at lower voltage. MPPT controllers adjust the voltage to maintain the most efficient level of power. In cooler conditions, MPPT controllers are observed to be more effective than PWM controllers due to their ability to capture extra PV voltage. Solar panels used in All In One solar street lights Though both monocrystalline and polycrystalline solar panels are used in solar street lights, polycrystalline solar panels are most commonly used in All In One solar street lights due to their cost effectiveness. Since most of the All In One solar street lights use motion sensors, they do not require solar panels with more wattage. Batteries used in All In One solar street lights Lithium ion phosphate (LiFePO4) batteries are widely used in All In One solar street lights due to their multiple advantages. LiFePO4 batteries offer upper and lower voltage protection and longer lifespan. These batteries can operate in different temperature range and are maintenance free. LiFePo4 batteries are the perfect choice for All In One solar street lights due to their relatively small and light feature. Lithium-ion as well as lead acid batteries are also used in some All In One solar street lights. Light source used in All In One solar street light LED light source is used in as it consumes less energy and gives higher luminosity. Installation of All In One solar street lights Compared to integrated solar street lights, the installation of All In One solar street lights can be carried out easily. The All In One solar street light can be effortlessly mounted due to its compact size and also due to the fact that there are no wires or cables to connect. They can be installed either on a pole or on a wall. The pole should be fixed to a flat ground without inclination. The light fixture should be installed to the pole before erecting the pole. The pole should go at least 3 feet deep inside the ground. The basic cage must be secured to the ground using concrete. It is essential to place the poles at even widths to provide uniform brightness to the entire area. The poles must be placed in the right position and angle so that the panels get sufficient direct sunlight throughout the day. Since All In One solar street lights have dusk to dawn feature, they need very minimal maintenance once installed. Rain water washes away most of the dust and dirt off the solar panels; however, routine cleaning of the panels helps the efficiency of All In One solar street lights. The solar panels can be cleaned by wiping them with a soft cloth or spraying water with a jet spray. Occasionally, you may inspect the installation bracket and the mounting arm to look for any damage. The All In One solar street lights are automatic in its function. They are operated with infrared motion sensor which helps to detect movement in its field and illuminate the lights, thereby ensuring security. Also, the controller can be set to operate in a timer-based manner where in the lights operate in full brightness for the first four hours and then later, in lower light for rest of the time. With the motion sensor and dimming options, the All In One solar street lights tend to save energy, thereby guaranteeing longer life to the lighting fixture. No cable work or electric equipment is needed, so the installation/construction cost is lesser. No need of manual intervention after installation, so the management cost is lesser. The lights are powered solely by using solar energy and no conventional energy is used, so the operation cost is lesser. Installation is easier and faster and maintenance is very minimal. Compared to integrated solar street lights, All In One street lights are less expensive. Since All In One solar street light requires direct sunlight to give its full potential at night, it may not be able to meet requirement of the areas with insufficient sunlight. Since having shadows may obstruct the sunlight to fall onto the solar panels to charge them efficiently, installation sites may be limited. Initial investment to purchase All In One solar street light is high compared to traditional lighting system. However, the benefit of advantages is far beyond the shortcomings of disadvantages. With the technological advancement, All In One solar street lights will be more and more used in the coming future.3. Recycling light from solar street lights.?No,the theroy for solar street light work in night is get the electrcity from the battery,the power in batter can last 1-2 days
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