恶劣环境中的电子产品。产品验证和确认

K. Stentoft, M. L. Petersen
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引用次数: 5

摘要

由于电子产品几乎用于任何产品,并且无处不在,因此对强大的电子产品的需求不断增加。客户希望工业产品无论在什么位置都能运行至少5年无故障。为了能够设计出在恶劣环境下坚固耐用的产品,必须了解和理解客户的具体条件。接下来,整个产品和单个部件的要求必须有适当的规定。最终产品应能够通过坚固性测试,如腐蚀性气体、湿度和污染。对单个零部件供应商的要求应包括在恶劣环境下的清洁度和寿命数据。丹佛斯为新产品开发了一个简单的三步“侵略性sub - 3”测试程序,包括暴露在盐雾、侵略性气体和循环湿度中。这些测试显示与现实生活场景非常吻合,但由于未知因素太多,无法确定相对于客户环境的确切加速度因子。然而,可以进行各种应力水平的寿命试验,从而确定单个或少数应力源的加速因子。其他“必须”测试包括粉尘测试、冷凝湿度测试和温度循环。分析市场反馈也非常重要,从而获得更多关于客户和产品的知识,从而能够不断改进。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Electronics in harsh environments - product verification and validation
The demand for robust electronics is continuously increasing, as electronics is used in almost any products and placed everywhere. The customer expects industrial products to operate at least 5 years without failures, no matter the location. In order to be able to design products which are robust against harsh environments, the specific conditions at the customers must be known and understood. Following, the requirements for the entire product and the single parts must be specified properly. The final product shall be able to pass robustness tests, such as aggressive gases, humidity and contamination. Requirements to the suppliers of single parts and components shall include cleanliness and lifetime data in harsh environments. Danfoss has developed a simple three step 'aggressive sub 3' test procedure for new products, which involves exposure in salt mist, aggressive gasses and cyclic humidity. These tests show good conformity with real life scenarios, but exact acceleration factors relative to the customer environment can not be established, since too many factors are unknown. However it is possible to make life tests with various stress levels and thereby determine acceleration factors for single or few stressors. Other 'must' tests are dust tests, condensing humidity tests and temperature cycling. It is also very important to analyze market feed-backs and thereby get more knowledge about the customers and the products, to be able to make ongoing improvements.
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