Today feilong bought a Chinese colander, and made a gain antenna for my wireless adapter.Colander,looks mediocrel,but the by it seems improved the wireless singals. So feilog have a research on it, url is http://feilong.org/zhaoli-loushao-en
What is a Chinese colander? It is a traditional Chinese cooking utensil,also known as strainer (zhào lí), with a long handle, used for fishing things, like fishing dumplings, chinese twisted crullers and others.
The principle is，when cooking and fishing something，the soup leaves out from the mesh, then the food and the soup is separated.
Chinese colander was made of Bamboo or wicker in ancient times. Nowadays, with lead wire or woven wire.
Japanese has a similar utensil named by strainer. But there are essential differences between the two. Strainer has become a part of Japanese cuisine, similar to a small basket which is used for food preparation or serving. A Chinese colander always has a handle, and it is larger than a teaspoon.
New invention, "adjustable mesh of colander ," interesting? made of stainless steel sheets,0.5mm thick in theoretical.each colander needs double-layer sheets.Adjustable mesh,clean, easy to use.
1.colander with diameter of 150mm
Every cubic meter of steer can be stamped into 72000 sheets (36000 colanders).Steel density is 7.93 g/cm3.Every ton of steel can be be stamped into 9079 sheets(4539 colanders).The price of steel in Wuxi city is 21,500 yuan/ton.So the cost of one colander is 4.736 yuan (21500/4539).
2.colander with diameter of 190mm
Every cubic meter of steer can be stamped into 50000 sheets (25000 colanders).Steel density is 7.93 g/cm3.Every ton of steel can be be stamped into 6305 sheets(3152 colanders).The price of steel in Wuxi city is 21,500 yuan/ton.So the cost of one colander is 6.821 yuan (21500/3152).
3.The accessory of each colander weigh 50 grams.
Every ton of steel can be made into 20000 accessories.So it costs 1.075 yuan/accessory.
4.Colander with diameter of 150mm, weight 180 grams (total 230 grams, the accessory 50 grams).
Each ton of steel can be made into 5555 set of Colander. Steel price 21,500 yuan/ton.So each set of colander costs 4.945 yuan(3.87 yuan plus accessories 1.075 yuan). Making the mesh diameter greater than 10mm can reduce the weight.
5.Colander with diameter of 150mm, weight 300 grams (total 350 grams, the part 50 grams)
Each ton of steel can be made into 3333 set of Colander. Steel price 21500 yuan/ton.So each set of colander costs 7.525 yuan(6.45 yuan plus accessories 1.075 yuan). Making the mesh diameter greater than 10mm can reduce the weight.
6.Produce 3000 sets of colanders daily, then 1.095 million sets a year(3000 × 365 days)
Feilong notes: As a colander shapes like of spider web, it is often translated as Spider, in fact an accurate translation is colander filter, more accurate translation is a spider colander, meaning spider-like filter. For this kind of colander is unique in China, it can be called ZhaoLi or LouShao or Chinese Colander.
A colander can be used as a gain antenna on a usb wireless adapter: http://feilong.org/antenna-colander-en