- 品牌/商標:P+F
- 企業(yè)類型:貿(mào)易商
- 原產(chǎn)地:德國
對于噪聲免疫力,插在前面的脈沖輸入濾波器
的頻率轉(zhuǎn)換器。輸入頻率(包括噪聲
高于這個濾波器的極限頻率的頻率)
不能再進行處理。該設(shè)備然后檢測
靜止(無脈沖) 。這種不受歡迎的情況可以
可以避免的,如果低于測量安全邊際
保持設(shè)備的頻率。在這種情況下,它也
重要的是要注意的窄脈沖的脈沖寬度。
頻率測量功能
后部分介紹了檢測的動態(tài)脈沖
信號(頻率測量) 。相關(guān)設(shè)備的功能
可供任何應用方案。
停頓和轉(zhuǎn)速監(jiān)測
跳閘值監(jiān)測涉及到監(jiān)測是否
輸入頻率低于(閔報警)或高于
(馬克斯報警)給定的跳閘值。
小/報警
在閔報警的情況下(見圖23) ,
測量值進行監(jiān)控未能達成
跳變點,而報警監(jiān)控該值是否
超標。輸入滯后,以防止輸出
不斷改變其狀態(tài)時測得的值
點附近的振蕩。的操作模式可以是
交換機的輸出是否是主動或被動選擇
的跳閘點到達。
By forming a mean value over several cycles, it is possible
to damp the signal, although larger variations will still be
apparent. Eff ects with diff erent cycle durations generally
only occur with non-symmetrically formed segment plates;
even diff erently aligned screw heads on a shaft can lead to
variations in cycle duration. That is why it often makes sense
to work with just one operation element per revolution at
higher rotational speeds.
Limits to the Procedure for Measuring Cycle
What happens if the rotational speed drops sharply, i. e. the
machine brakes quickly? To begin with, it is not possible to
detect any further pulses. An integrated measuring procedure
must be activated for this purpose. Even when the machine
is stopped, the frequency cannot be immediately set to 0 Hz.
In theory, the asymptotically decreasing process can take an
infi nite amount of time.