Chapter 4 Description of Functions
4-2
4
4-1
Features of HL-D3 Series
4-1-1
Multi-zone Beam Control (MZBC)
The displacement sensor using the conventional line laser radiates the line
beam with uniform light intensity distribution. When the reflection rate or
detected light intensity of the target workpiece in the same field is a lmost
constant, the displacement detection accuracy was obtained by optimizing the
radiation level.
However, if a part with largely different reflection rate also exists in the same
field, it is difficult to control the optimum light intensity in all part s.
When the light intensity is decreased to optimize the part with high deflection
(white part), the detected light intensity is in short at the part with low refle c-
tion rate (black part) or part with high slope, and the displacement measurement
value is unstable. In contrast, when the light intensity is increased to optimize
the part with low reflection rate, the detected light intensity is saturated at the
part with high reflection rate and it is difficult to achieve stability.
The HL-D3 series divides the measuring range into segments. The sensitivity
is controlled for each segment zone (beam power control unit) for optimiz a-
tion. This is called multi-zone beam control (MZBC) function.
Since the displacement of each part is measured at the optimum light intensity
for each zone, there is not saturation or shortage of light intensity. The mea s-
urement value is stable.
白黒混在ワークにライン
ビームを照射
受
光
量
白部分
黒部分
光量不足
光量飽和
<従来方法>
受
光
量
白部分
黒部分
<MZBC機能>
近い受光量
Radiating line beam to the
black and white mixed
workpiece
D
e
te
ct
e
d
li
g
h
t i
n
te
n
si
ty
Light
intensity
saturation
Insufficient
light intensity
White part Black part
White part Black part
<Conventional method>
D
e
te
ct
e
d
li
g
h
t i
n
te
n
si
ty
Close detected
light intensity
<MZBC function>
Summary of Contents for HL-D3 Series
Page 9: ...Preface 7 ...
Page 27: ...Preface 24 MEMO ...
Page 43: ...Chapter 1 Before Use 1 16 1 MEMO ...
Page 219: ...Chapter 4 Description of Functions 4 140 4 MEMO ...
Page 298: ...1 Apx Appendix 1 Index 2 ...
Page 304: ......