The following two parts will be briefly introduced. Regardless of whether the LED is presented as a part or a finished product, the following modes can be utilized and the basic verification of the LED product can be achieved.
Product life verification
In the electronics industry, in order to claim the life of a product, three methods are usually used.
(1) Life Prediction Method (Prediction)
Method: According to MIL HDBK 217 Part Count and Part stress principles, software is used to calculate the life of the product.
Advantages: Short time and low cost. Disadvantages: The result is very different from the actual product life.
(2) Lifetime measurement method (Demonstration)
Method: Using Acceleration model, the Acceleration factor was obtained and the actual sample was provided. The sample was measured by an environmental test simulator to obtain the product life. At present, the acceleration model adopts the highest Arrhenius model (high temperature acceleration), Coffin-Manson model (temperature cycle acceleration) and Hallberg-Peck (humidity acceleration).
Advantages: The result is more realistic than the prediction method and high acceptance in the industry. Disadvantages: High cost and time-consuming method
(3) Field return method (Field return)
Method: Recycle the use of product users in the market.
Advantages: The result is equal to the real life shortcomings: Time and cost are longer, market use conditions are difficult to obtain, usually only the brand field self-storing the above three methods for obtaining product life is most adopted by the industry by life measurement method, because it can not only exempt the result In addition to the shortcomings of the actual gap, and it is measured by actual measurement, regardless of the acceptance of both buyers and sellers.
This ploughing cultivator is centered on a rotating column and surrounded by ploughing knives. The land ploughed by our machines is very loose, the soil has been improved, fertilizer and soil conservation. Through cultivated land, the surface soil layer of a year is turned to the lower layer, so soil maturation is accelerated, which is conducive to promoting the journey of soil aggregate structure, thickening the living soil layer, deepening the cultivation layer, and increasing the living soil layer.
Rotary ploughing Cultivator Machine Technical Parameters:
1. Cutter shaft: single-axis
2. Tilling width: 2000 mm
3. Size: 2250*750*980 mm
4. Rated power: 51.5-65KW
5. Weight: 386KG
Typical Applications: can be worked in paddy field, dryland or hilly ground.
If you have any questions, please contact us directly. Crawler tractor for agriculture are produced by Hunan Nongfu with high quality and good appearance.
welcome you can visit our factory for inquiry, please send mail directly to us.
Rotary ploughing Cultivator Machine
Tiller Cultivator, Small Tractor Cultivator, mini tillage machine, rotary tiller
Hunan NongFu Machinery&Electronic.Co., Ltd. , https://www.nfagmachine.com