Modular Data Acquisition
Distributed Measurement and Control
High-Performance Test
Automated Test System Development Software
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Provides support for NI data acquisition and signal conditioning devices.
Provides support for Ethernet, GPIB, serial, USB, and other types of instruments.
Provides support for NI GPIB controllers and NI embedded controllers with GPIB ports.
修改时间 07-23-2012 01:39 AM
小弟想做一个振动信号采集测试的系统,有些个问题想在此请教一下
1.我们一般用的振动传感器,给出的信号都是电荷量,然后通过电荷放大器转换成电压量,然后给数据采集设备——先前采购的NI设备中,有一块专门测量振动信号的板卡,迷惑,都是电压信号,这种板卡和普通的模拟量采集卡功能上有什么区别?
2.论坛里有没做过这方面的兄弟,有没有用过直接输出电压量的振动传感器?或者说都得第一个问题里那种传输模式
修改时间 07-25-2012 10:08 AM
做过。
PCB Piezotronics 有直接输出电压量的振动传感器。
修改时间 07-29-2012 08:35 PM
这个问题我来帮你解答:首先振动测量的信号通常都是微弱电信号,很受普通板卡的制约,需要外加激励。基于这种情况NI的DSA包含了高动态范围,高精度,以及抗混叠,数字滤波器,0.4mA激励的特点。
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