ABB传感器PFEA111-112中英文手册(15)

PFCL 301E测量张力也测量压力。

If the T(sinα+sinβ) is larger than the tare weight, the load cell will be in tension. 如果T(sinα+sinβ)大于皮重，测压单元将受力。 To get the capacity of each load cell: 获得每个压头的能力：

1. Divide (FR –Tare) by two if FR is greater than or equal to (Tare *two).

如果FR 大于或等于两倍的皮重，将（FR –Tare）分为两个。 2. Divide Tare by two if FR is smaller than (Tare*two). 如果FR 比两倍的皮重小，将皮重分为两个。 B5.2 Inclined Mounting 倾斜安装

Sometimes it is necessary to mount the load cell on an inline due to mechanical design constraints of the machine or the need to have a proper force component applied to the load cell. 有时因机械设计的约束或需要给压头上施加的力是适当的分量。

In this case, the incline angle modifies the tare load and the force components as shown. 这种情况下，同轴的角度改变所显示的皮重和分力。

B.6 Force Calculation for Measurement with a Single Load Cell

单压头的张力计算

In some cases, it is sufficient to measure the tension with only a single load cell mounted at one end of the roll. The roll should nevertheless be supported at both ends.

在某种情况下，在辊的一端使用一个就足够了。但辊必须两边支撑。 B.6.1 The Most Common and Simple Solution十分通用和简单的方法

The most obvious and simple solution is horizontal mounting with the web evenly distributed and centered on the roll.

最明显的和简单的解决方案是幅面在辊的中心水平均匀分布。

As long as the roll is supported at both ends, the same calculations given in Section B.5, Mounting Alternatives, Calculating Force and Calculating Wrap Gain are valid. 尽管辊两端都有支撑，B.5提供了同样的计算方法。 NOTE注意

The accuracy of a single load cell measurement is highly dependent on how well the center of force can be determined. Since the cross-directional stress distribution generally is somewhat uneven, this is not easily done. The load cell will, however, produce a stable and repeatable measurement.

要使压头得到一个稳定和可重复的测量，因单个压头测量的精度在很大程度上取决于如何确定好的力的中心，而由于横向的应力分布总不会很均匀的，这很难办到。 B.6.2 Force Calculation when the Web is not Centered on the Roll 幅面不居中时力的计算

Use the calculations below for horizontal and inclined mounting when the web is not centered on the roll.

当幅面不在张力辊中央时水平和倾向安装用以下计算。

The applied force at the load cell will be proportional to the distance between the tension force center and the load cell centerline.

在压头上施加的力到张力中心和称重传感器中心线之间的距离成比例。 Calculation procedure: 计算程序： 1. Horizontal or inclined mounting?

是水平或倾斜安装？

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2. Calculate FR and FRT , see Section B.5, Mounting Alternatives, Calculating Force and

Calculating Wrap Gain

计算FR 和FRT ,参照B.5，装配可选，计算张力和计算增益。 3. Use the following equations: 用以下公式：

FR for single load cell = FR *(L-b)/L 单压头的FR = FR *(L-b)/L

FRT for single load cell = FRT *(L-a)/L 单压头的FRT = FRT*(L-a/L

FRtot for single load cell = FR for single load cell + FRT for single load cell 单压头的FRtot= 单一测压单元的FR + 单一测压单元的FRT Where: 其中：

L = Distance between load cell centerline and the opposite bearing centerline L=测压单元中心线和对应轴承中心线的距离 …… 此处隐藏：817字，全部文档内容请下载后查看。喜欢就下载吧 ……