摘要
铁路安全继电器是铁路系统中的重要执行元件,必须定期对其电气特性进行测量.针对继电器诸多型号对线圈电源高测量精度、宽动态范围的要求,开发了一种继电器电气特性测试系统,其中用AD620、OP27运算放大器搭建了合理的前端模拟信号调理电路,并使用了带有片内可调增益和数字滤波器的Σ-Δ型24位模数转换器AD7714,实现了继电器电气特性的自动测量和自动显示.
The railway safety relay is an important executable component in railway system, whose electrical characteristics must be tested timely. Relay embraces various categories, whose power supply must be of high measuring precision and wide dynamic range. One relay electrical characteristics test system was realized here. The preceding analog signal conditioning circuit was constituted with amplifier AD620 and OP27. And 24 bits ∑ - Δ ADC AD7714 that was integrated with programmable gain and digital filter was used. The relay electrical characteristics can be tested and displayed automatically.
出处
《郑州大学学报（工学版）》
CAS
2006年第4期62-65,共4页
Journal of Zhengzhou University（Engineering Science）
基金
河南省自然科学基金资助项目(0411010300)
河南省教育厅自然科学基金资助项目(2004510005)
关键词
安全继电器
信号调理
特性测试
safety relay
signal conditioning
characteristic test
