Wireless Electrical Energy Transmission

WEET, wireless electrical energy transmission is now an issue to transfer electrical power on large-scale and longer distances; because wireless energy transfer system is not a new question. Electrical energy transmission networking systems already use wireless energy transfer technology or unlike direct electrical connection. WEET system will be clear if you review your knowledge about the basic working principle of electrical transformers.

Now today’s target is to transfer electricity without wire from the source to the consumer’s end on a large scale. Already there are many demonstrations and operational stuff regarding wireless electricity transfer on a normal scale, like- mobile battery chargers, operating TV, laptops, etc. devices.

What Is the Wireless Electrical Energy Transmission Technology?

Engineers’ are searching for a practical technology to transmit electrical energy

You Should Know all About Fire Extinguisher Using Guide

Firefighting and Portable Fire Extinguisher Using Guide

Millions of fire incidents happen each year at the workplace around the world, resulting in huge casualties and deaths. Just being familiar with and following simple firefighting and fire extinguisher using basic guidelines, it’s possible to save valuable life and properties. Including all working personnel in the workplace, everybody should know the basic rules to use a fire extinguisher and evacuation procedure if fired anywhere.

Types of Fire Extinguishers

Types of fire extinguishers are not the same for every country. Someone follow their own standard, but NFPA standards are very well-known and followed by many countries.

The Guide to Understand the Fire Precautions at Your Workplace

Fig: Fire Extinguisher operating instruction

What to do if there is a fire in your workplace?

If there is a fire, the first priority is to ensure that everybody can reach a safe place quickly. Putting the fire off is totally second priority. The recorded danger from fire in the workplace is the spreading of the fire and generated heat and smoke seriously. If there is no enough system to detect fire and generate alarm to safe escape, the fire can trap people or they may be overcome by the heat and the smoke before they can evacuate.

How Manage the Risk of Working near on Water and Prevent Accident?

The Efficient Managing Procedure for the Risk of Working near Water and Prevent Accidents

Working near water is a common danger in many industries. The water can come from any number of sources: rain, snow melt, wastewater, and runoff from industrial processes. It's important to understand how to prevent accidents that can occur when working near water.

How Calculate Lux and Lumen of Light Illumination in a Surface?

What is the Relation between  Lux, Lumen, and Illumination?

Lux is the luminous intensity which is also said as candela per meter squared. It is the amount of light falling on a surface.

Basically, lux means daylight, brightness, and illumination. For ‘light of the world’ the Vulgate has lux Mundi. ‘At first light’ is prima luce.

The Lux value of any light source is not a static value so cannot be part of a standard specification. Only the manufacturer can determine and specify the total lumen output.

Lux is a measure of the perceived brightness level per unit area. 1 lux = 1 lumen / sq miter.

What Is Lumen?

Lumen is the measure of visible light emitted by a light source.  It is also referred to as "luminous flux" or sometimes as "luminous power".

Lumen means a source of light, a lamp, an opening in the wall that lets in the light; it can also mean glory or excellence. In the plural, lumina can mean ‘eyes’. But there is also a certain amount of overlap between the two words.

A typical incandescent bulb provides about 860-lumen output for 60 W input so about 14 lumens/watt.

An LED will give about 800 lumens for 10 Watts so about 80 lumens/watt.

No practical light source will achieve 683 lumens/watt because in that light everything is just different intensity of green.

Let's consider the mathematical example below to understand the relation between lux and lumen of light:

A flux of 1000 lumens, concentrated into an area of one square meter, lights up that square meter with an illuminance of 1000 lux. The same 1000 lumens, spread out over ten square meters, produce a dimmer illuminance of only 100 lux. Mathematically, 1 lx = 1 lm/m2. or, lux = lumens / (solid angle * distance^2)

For graphical understanding look at the following single graph to find the relationship between Lux and Lumen.

Case Study-01: 
The calculation of the lighting fixture’s lumen and diameter of illumination at the surface when known the following values:

Required illumination at the surface is 1390 Lux
The distance from Lighting Fixture to the illumination surface is 3 Meters.
The Fixture Beam Angle is 10 Degrees.

Calculation:
Required Lux at Surface (E2) =1390 Lux.
Distance between Lighting Fixture and Surface (D) = 3 Meters.
Fixture Beam Angle (ϕ)= 10°
Irradiance at 1.0 meter (E1)= DxDxE2
Irradiance at 1.0 meter (E1)=1390x3x3 =12510 Lumen / M2
Irradiance at 1.0 meter (E1)= 12510 Lumen / M2
Solid Angle of The Lamp (Ω) =2xπx(1-COS(ϕ/2))
Solid Angle of The Lamp (Ω) =2×3.14x(1-COS(10/2)) =6.28x(1-0.996)
Solid Angle of the Lamp (Ω) =0.0239 Steradian.
Required Lumen of Lighting Fixtures= E1x Ω
Required Lumen of Lighting Fixtures=12510×0.0239
Required Lumen of Lighting Fixtures=299 Lumen.
Illumination Diameter at surface =0.018xDx ϕ
Illumination Diameter at surface =0.018x3x10
Illumination Diameter at surface =0.54 Meter.

Case Study-2:
The calculation of the lighting fixture’s lumen and diameter of illumination at the surface when known the following values:.
Required illumination at the surface is 22 Lux
The lighting Fixture Lumen is 1547 Lumen.
The distance from Lighting Fixture to the illumination surface is 4 Meters.

Calculation:
Required Lux at Surface (E2) =22 Lux.
Distance between Lighting Fixture and Surface (D) = 4 Meters.
Irradiance at 1.0 meter (E1)= DxDxE2
Irradiance at 1.0 meter (E1)=4x4x22 =352 Lumen / M2
Irradiance at 1.0 meter (E1)= 352 Lumen / M2
Solid Angle of The Lamp (Ω) = Lumen of Lighting Fixtures / E1
Solid Angle of the Lamp (Ω) =1547 / 352
Solid Angle of the Lamp (Ω) =4.394 Steradian.
Solid Angle of The Lamp (Ω) =2xπx(1-COS(ϕ/2))
39 =2×3.14x(1-COS(ϕ/2))
Fixture Beam Angle (ϕ)=145°
Illumination Diameter at surface =0.018xDx ϕ
Illumination Diameter at surface =0.018x4x145
Illumination Diameter at surface =10.44 Meters.

Lux Meter

Sponsored:

A lux meter is a device that uses for measuring brightness. A lux meter works by using a photocell to capture light. The meter then converts this light to an electrical current. It specifically measures the intensity with which the brightness appears to the human eye.

Common Digital Lux Meter Available at Local Market :

1. The Dr. Meter Digital Illuminance Meter
2. The Greatist Digital LCD Lux Meter
3. The Tondaj Digital Luxmeter Light Meter
4. The Maximum Horticulture LX-1010B Digital Luxmeter Light Meter
5. The CEM DT-1309 Professional Digital Lux Meter

Power Tools Inspection and Taking Care

 Inspection and repair of power tools

It is very essential to check your equipment at regular intervals. If they have any damage, repair or replace them.

CRACK OR LOSE HANDLE: 

Damaged wooden handles are prone to breakage due to injury. Therefore, it is necessary to replace them. However, if the handle is not partially damaged, rub it until it is smooth enough for further use. Finish the process by coating it with linseed oil.

MUSHROOMED HEADS ON WEDGES AND chisels: 

A mushroom head means that the edge of the wedges wears out due to overuse. In this situation, the end of the tool may break. To avoid this problem, keep the wedges sharp. Sharpen it every six months for better results.

These are some tips to make your electronic equipment last longer and clean. The continuous inspection helps to maintain them in perfect condition. 

Power Tools Cleaning

When it comes to power tools, cleaning and maintaining them can be a daunting task. Before cleaning power tools, make sure these are turned off and unplugged. Wipe off all its dust with a piece of cloth or a brush. Use machine oil to keep the moving parts of the tool in good working condition.

Keep Toolbox Clean

As well as keeping tools clean, it's also important to take care of your toolbox and clean it regularly. Empty the toolbox and wipe it down with a clean cloth. If you use a leather bag, be sure to condition the leather.

Oiling of Electronic Equipment

Tools that have a cutting surface need to be lightly oiled to prevent rust. Also, check these tools and their surfaces to make sure they are in good condition.

Safely Storage of Equipment

If you don't store tools properly, there's no use in cleaning them. For a large collection of appliances, cabinets can be a good choice. After using these tools, store them in an orderly and organized manner. This method will not only help you access them quickly but will also keep them safe.

Electronic equipment should not rub against each other when stored. Keep all equipment in a dry area and protect them from moisture, dust, and direct sunlight.