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怎么选购加速度传感器 - http://www.jmxinfeng.com - Added on 2014-11-21 11:23:56 怎么选购加速度传感器 怎么选购加速度传感器 模仿输出vs数字输出: 这个是最早需求考虑的。这个取决于你系统中和加速度传感器之间的接口。通常模仿输出的电压和加速度是成份额的,比方2.5V对应0g的加速度,2.6V对应于0.5g的加速度。数字输出通常运用脉宽调制(PWM)信号。 假如你运用的微操控器只需数字输入,比方BASICStamp,那你就只能挑选数字输出的加速度传感器了,可是问题是你有必要占用额外的一个时钟单元用来处置PWM信号,一起对处置器也是一个不小的担负。 假如你运用的微操控器有模仿输入口,比方PIC/AVR/OOPIC,你可以非常简单的运用模仿接口的加速度传感器,所需求的即是在程序里参加一句相似"acceleration=read_adc()"的指令,并且处置此指令的速度只需几微秒。 丈量轴数量: 关于大都项目来说,两轴的加速度传感器现已能满意大都使用了。关于某些特殊的使用,比方UAV,ROV操控,三轴的加速度传感器可能会合适一点。 最大丈量值: 假如你只需丈量机器人有关于地上的倾角,那一个±1.5g加速度传感器就足够了。可是假如你需求丈量机器人的动态性能,±2g也应当足够了。要是你的机器人会有比方俄然启动或许中止的状况出现,那你需求一个±5g的传感器。 活络度 通常来说,越活络越好。越活络的传感器对必定范围内的加速度改变更灵敏,输出电压的改变也越大,这样就对比简单丈量,然后获得更准确的丈量值。 带宽 这儿的带宽实际上指的是刷新率。也即是说每秒钟,传感器会发作多少次读数。关于通常只需丈量倾角的使用,50HZ的带宽应当足够了,可是关于需求进行动态性能,比方振荡,你会需求一个具有上百HZ带宽的传感器。 电阻/缓存机制 - [Read More] |
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