SICK WTV4F Manual Del Usuario página 126

86 调试
126
WTV4F 为带背景抑制功能的漫反射光电传感器。根据待检物体及后面可能存在的背
景的反射比，在已设置触发感应距离 (x) 与背景之间保持最小距离 (y)。
检查使用条件：
使用随附的图表调整触发感应距离和与物体或背景的距离及物体的反射能力（x = 触
发感应距离，y = 已设置的触发感应距离和背景（白色，90%）之间的最小距离，反
射比：6% = 黑色 1，18% = 灰色 2，90% = 白色 3（以 DIN 5033 规定的标准
白为基准））。我们建议使用低反射比的物体进行设置。
背景抑制功能的最小距离 (= y) 可以从插图
示例：x = 20 mm，y = 1,2 mm。即，当与传感器距离 > 1,2 mm 时，才能抑制背
景（白色，90%）。
Minimum distance in mm (y) between the set sensing
range and white background (90 % remission)
y
7
(0.28)
6
(0.24)
5
(0.20)
4
(0.16)
1
3
1%/90%
(0.12)
6%/90%
2
2
(0.08)
3
1
18%/90% 3 4
(0.04)
90%/90% x
0
0 10 20 30 40 50
(0.39) (0.79) (1.18) (1.57) (1.97)
Distance in mm (inch)
Recommended sensing range for
the best performance
插图 116: 特征曲线
High-glossy object, angle of acceptance
α
20
15
10
5
0
–5
–10
–15 Example:
Set sensing range x = 30 mm
Angle of acceptance between –12° and +5°
–20
x
0 10 20 30 40 50
(0.39) (0.79) (1.18) (1.57) (1.97)
Distance in mm (inch)
Recommended sensing range for
the best performance
插图 118: 光斑尺寸
High-glossy object, angle of acceptance
β
20
15
10
5
0
–5
–10
–15
–20
x
0 10 20 30 40 50
(0.39) (0.79) (1.18) (1.57) (1.97)
Distance in mm (inch)
Recommended sensing range for
the best performance
插图 120: 光斑尺寸
插图 116
1
2
2
Example:
Safe suppression of the background
3
2
White background (90 %)
4
2
0
x y
Black object (6 % remission)
Set sensing range x = 20 mm
Needed minimum distance to white
background y = 1.2 mm
A
插图 117: 条状图
Transparent pane of glass in front of background
(18 % remission), angle of acceptance
α
10
5
–α +α
0
x
–5
–10
0
d = 10 mm
d = 40 mm
d = 80 mm
Recommended sensing range for
the best performance
插图 119: 光斑尺寸
Transparent pane of glass in front of background
(18 % remission), angle of acceptance
β
10
5
0
–β +β
x
–5
Example:
Set sensing range x = 30 mm
Angle of acceptance between –7° and +7°
–10s
0
d = 10 mm
d = 40 mm
d = 80 mm
Recommended sensing range for
the best performance
插图 121: 光斑尺寸
中如下确定：
5 15 30
15 50
15 50
15 50
10 20 30 40 50
(0.39) (0.79) (1.18) (1.57) (1.97)
Distance in mm (inch)
D
C
B
–α
x
Example:
Set sensing range x = 30 mm
Distance object to background d ≥ 200 mm
Angle of acceptance between –4° and + 7°
10 20 30 40 50 x
(0.39) (0.79) (1.18) (1.57) (1.97)
Distance in mm (inch)
d = 120 mm
d ≥ 200 mm
–β
x
Example:
Set sensing range x = 30 mm
Distance object to background d ≥ 200 mm
Angle of acceptance between –6° and +6°
x
10 20 30 40 50
(0.39) (0.79) (1.18) (1.57) (1.97)
Distance in mm (inch)
d = 120 mm
d ≥ 200 mm
8025302.1BBX / 2021-05-12 | SICK
Subject to change without notice
BluePilot
E
F
+α
d
+β
d