SAE J1455测试考虑因素

SAE J1455是与汽车市场相关的产品的“转移”测试规范。适合开发旁路和越野车辆以及重型卡车的测试计划。

当您认为40%至60%的汽车汽车由电子零件组成时,SAE J1455是一种确保可靠性性能的有价值的资源。元素被认证以执行SAE J1455。

SAE J1455应该被视为设计指南

规范基于主要北美卡车制造商和部件供应商的测试结果。SAE J1455中所呼出的测试不应更换实际操作规范。

SAE J1455考虑因素

对基于SAE J1455开发测试计划的客户仍需要确定:

Number of cycles

知道最终的测试将是一个短的硬脑膜tion of environmental exposure. Consider the location and function of the product and remember the number of cycles should not represent an accelerated test in order to try and determine reliability/durability. That is a different test all together. Consider停止/哈斯测试to establish operating limits and reliability data.

通过/失败标准

应该在测试开始之前确定这一点。它听起来很简单,但如果未发现通过/失败,则可能导致使用可疑结果测试的额外时间和费用。如果您正在将测试外包给独立的实验室,并且不会见证测试,则识别通过/失败尤为重要。需要清除测试技术人员的检验说明,以便在测试数据中注明它们。

Sample Size

How many samples are necessary to draw reasonable conclusions about how the product will behave under test? An independent test lab will also want to know this information to help determine which test equipment to utilize for the test.

测试序列

一般来说,SAE建议最后(即,休克振动)放置最严重的环境测试。通常首先进行温度循环以便机械地调节测试制品。

结合测试

确实,SAE J1455中所涉及的许多环境条件在现实世界的条件下同时发生。通常,组合的曝光可能具有比一次暴露于一个条件的更严重/重要的结果。SAE网站这里有两个非常相关的例子:

  • 温度和振动 - 产品设计和安装位置是否易于同时组合的温度和振动?
  • Humidity with both high and low temp exposure – This combination can be very important as it relates to seal integrity of electrical components under test. Humidity is water. It will condensate at high temps, possibly penetrate seals. At low temps, water can freeze inside the component if the seal has failed.
我应该执行什么J1455测试?

SAE has identified 13 environments that will likely have an impact on components installed on a vehicle.

记得在决定选择哪种测试时,请考虑将湿度与高低温度和温度有振动。对于以下每个条件,SAE J1455给出:(a)环境的定义,(b)环境对性能的影响,(c)推荐的测试方法。

  • Temperature (Includes Thermal Shock)
  • 湿度 - 有两个推荐的湿度周期。一个是一个8小时的温度/湿度循环,第二个是在压力下的温度/湿度循环,以发现塑料封装的半导体中的缺陷。
  • Salt Spray (SAE recommendsASTM B117.
  • 浸没/飞溅水,化学品油
  • 蒸汽清洁/压力洗涤
  • 灰尘/沙子和砾石轰击
  • Altitude
  • Vibration
  • 震惊
  • General Electrical Environment
  • Steady State Electrical
  • Transient/Noise/Electrostatic
  • 电磁兼容性(EMC)
  • 电磁干扰(EMI)
位置,位置,位置

Refer to Section 5 of the spec to determine the location on the vehicle the component will be installed. This helps refine the tests to select. There are further location sub-categories, but here are the basics:

  • Underhood
  • Interior Cab
  • 驾驶室的内部船尾
  • 机壳
  • 驾驶室外观

例如,热冲击试验的温度最小和最大极端基于车辆上的部件的位置变化。SAE J1455包含概述极端温度的表。最小温度为-40c至最大+ 307c的最大温度,基于组件的位置。

SAE J1455测试的成本是多少?

这取决于。样本大小,循环次数,结合环境条件都在测试成本中发挥作用。询问测试数据而不是正式报告将节省成本。

元素can help advise on how long the individual test profiles in SAE J1455 take and will work with you to determine the most efficient and cost effective scheduling possible.

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