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实用新型
CN204425040U 具有精确计算CPU使用率的智能变电站测控装置 失效 - 权利终止

具有精确计算CPU使用率的智能变电站测控装置
摘要：
本实用新型公开了一种具有精确计算CPU使用率的智能变电站测控装置，包括中央处理器、液晶显示屏、若干只按键、同步动态随机存储器、闪存、时钟电路、网络控制器、5口交换芯片，特征是：中央处理器的计数端与可编程计数器的计数端连接，由中央处理器控制可编程计数器计数。中央处理器可获取用于CPU使用率计算的N秒（10≥N≥5）内计数基准数值C基准，以及N秒内系统各个空闲时段计数值的和C合，通过以下公式计算出CPU使用率：CPU使用率＝1－C合／C基准。可编程计数器实现了对测控装置CPU使用率的精确计算，克服了由于构建测控装置的VxWorks操作系统无法提供CPU使用率数据、采用纯软件方法无法准确计算CPU使用率的缺点。
摘要（英）：

The utility model discloses an intelligent transformer station measurement and control apparatus capable of accurately calculating a CPU utilization rate, comprising a CPU, a liquid crystal display screen, a plurality of buttons, an SDRAM, a flash memory, a clock circuit, a network controller, and a five-port exchange chip, and characterized in that the counting end of the CPU is in connection with the counting end of a programmable counter; the CPU controls the programmable counter. The CPU can obtain an N (10>=N>=5) second counting benchmark value C benchmark used for calculating a CPU utilization rate, and each idle period counting value and C combination in an N second system; the CPU utilization rate can be calculated according to the following formula: CPU utilization rate=1-C combination/C benchmark. The programmable counter can accurately calculate the CPU utilization rate of the measurement and control apparatus, and overcomes the problem that a VxWorks operation system constructing the measurement and control apparatus can not supply CPU utilization rate data, and the CPU utilization rate can not be accurately calculated by employing a pure software method.

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