MQ-W3CR-DC12-24VEM [ETC]
Triple Beam Trigonometric Area Reflective Photoelectric Sensors; 三重梁三角区反射型光电传感器
| 型号： | MQ-W3CR-DC12-24VEM |
| 厂家： | 
ETC |
| 描述： | Triple Beam Trigonometric Area Reflective Photoelectric Sensors |
| 文件： | 总6页 (文件大小：239K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MQ-W
SERIES
Triple Beam Trigonometric
Area Reflective Photoelectric Sensors
Very accurate detection by triple beam triangulation sensing method in a compact package.
Environmental resistance
Immersion protected construction
(equivalent to IEC IP67)
High speed detection: Max. 2 ms
Light-ON/Dark-ON output is wire
selectable.
Operating voltage of 12 to 24 V DC
Adjuster and Indicators
Adjustment
indicator LED
Distance adjustment dial
MQ-W3 type
MW-W20 type
Operation
Indicator LED
(Comply with EMC directive MQ-W-EM type only)
* Original
Sensor
Adjustment
indicator LED
Distance adjustment dial
No-miss operation regardless of
back-grounds
FEATURES
Accurate detection regardless of
color, material, or shape of objects
Area reflective type sensor can detect
white or black object at the same dis-
tance. In case of diffuse reflective type,
it is difficult to detect objects of various
color with the same sensitivity setting.
MQ-W area reflective type sensor is
useful for such a case.
Area reflective type sensor does not
detect objects beyond the set range.
Resistant to lens surface soiling
Area reflective type sensor detects the
distance by the angle, not the intensity
of received light. Even if the lens sur-
face is soiled by dust or any powdery
material, there is a little variation of
sensing range.
MQ-W70 type
Operation
Indicator LED
SENSING RANGES
Sensing range (m ft.)
0.2 .656
0.03 .098
MQ-W3 types
0.7 2.297
MQ-W20 types
MQ-W70 types
PRODUCT TYPE
Detection method
Range
Rated operating voltage Control output
Light source
Infrared LED
Red LED
Part number
*1 CE types
MQ-W3A-DC12-24VEM
MQ-W3A-DC12-24V
NPN
PNP
NPN
PNP
MQ-W3AR-DC12-24V MQ-W3AR-DC12-24VEM
MQ-W3C-DC12-24V MQ-W3C-DC12-24VEM
0.03 m .098 ft.
Infrared LED
Red LED
MQ-W3CR-DC12-24V MQ-W3CR-DC12-24VEM
MQ-W20A-DC12-24V MQ-W20A-DC12-24VEM
MQ-W20AR-DC12-24V MQ-W20AR-DC12-24VEM
MQ-W20C-DC12-24V MQ-W20C-DC12-24VEM
MQ-W20CR-DC12-24V MQ-W20CR-DC12-24VEM
MQ-W70A-DC12-24V MQ-W70A-DC12-24VEM
MQ-W70C-DC12-24V MQ-W70C-DC12-24VEM
Infrared LED
Red LED
Triple beam area
reflective type
12 to 24 V DC
0.2 m .656 ft.
0.7 m 2.297 ft.
Infrared LED
Red LED
NPN
PNP
Infrared LED
1 These suffix EM types conform to CE. These types have the grounding connection inside of housing
*
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MQ-W
SPECIFICATIONS
1) Ratings
Rated operating voltage
12 to 24 V DC
30 mA or less (excluding load)
100 mA or less
Operating side
Load side
Rated current consumption
Output current capacity
2) Performance
Detection principle
Detection method
Type
Triple beam triangulation sensing method
Area reflective type
Amplifier selfcontained DC type
MQ-W3A-DC12-24V
MQ-W20A-DC12-24V
MQ-W20AR-DC12-24V
MQ-W20C-DC12-24V
MQ-W20CR-DC12-24V
MQ-W3AR-DC12-24V
MQ-W3C-DC12-24V
MQ-W3CR-DC12-24V
MQ-W70A-DC12-24V
MQ-W70C-DC12-24V
Part number
Sensing range
0.03 m .098 ft.
0.2 m .656 ft.
0.7 m 2.297 ft.
Detectable distance
0.02 to 0.04 m .066 to .131 ft.
0.04 to 0.2 m .131 to .656 ft.
0.2 to 0.7 m .656 to 2.297 ft.
White drawing paper
1ꢀ1 cm .394ꢀ.394 inch
White drawing paper
2ꢀ2 cm .787ꢀ.787 inch
White drawing paper
7.5ꢀ7.5 cm 2.953ꢀ2.953 inch
Standard target
Detectable target
Opaque, translucent
Hysteresis
10% or less the set range
20% or less of the set range
9.6 to 30 V DC ripple (P-P) included
Operating voltage range
Response time (freq.)
Initial insulation resistance
Initial breakdown voltage
Vibration resistance
Shock resistance
2 ms or less (250 times per second or less)
Min. 20 MΩ between a lead wire and external housing (at 500 V DC)
Between a lead wire and external housing: 500 Vrms for 1 min
10 to 55 Hz (1 cycle/min), double amplitude 1.5 mm .059 inch (2 h each on 3 axes)
980 m/s2 {approx. 100 G} (6 times each on 3 axes)
Diecast case immersion protected (equivalent to IEC IP67)
10,000 lux or less
Protective construction
Incandescent lamp
Sunlight
Usable ambient
light level
30,000 lux or less
Ambient temperature
Ambient humidity
–25 to 55°C –13 to +131°F (non-icing condition)
Max. 85% RH (non-condensing condition)
Storage temperature
–25 to 55°C –13 to +131°F
Operation indicator: Red LED ON with light entry
Adjustment indicator: Red LED ON with sufficient volume of lights
Indicator
Light source
Infrared LED/Red LED (R is added to the suffix of W3(20)A(C) in the part No.)
Note: Unless otherwise specified, the measurement conditions comprise rated operating voltage, power supply by battery, 20°C 68°F ambient
temperature, standard target and 200 lux or less illuminance on the receiver surface.
3) Output circuit diagram
NPN Output type
PNP Output type
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MQ-W
DATA
1. Operating range characteristics
MQ-W3 types
MQ-W20 types
MQ-W70 types
For 200 mm .656 ft.
For 150 mm .492 ft.
200
For 40 mm .131 ft.
40
.656
.131
Moving direction
600
Standard target
For 700 mm 2.297 ft.
For 500 mm 1.641 ft.
150
1.969
30
(white drawing paper
.492
Moving direction
.098
10×10 mm .394×.394 inch)
For 30 mm .098 ft.
For 20 mm .066 ft.
Standard target
Moving direction
400
(white drawing paper 20×
20
100
Standard target
1.312
.066
20 mm .787×.787 inch)
.328
(white drawing paper 75×
For 100 mm .328 ft.
75 mm 2.953×2.953 inch)
200
50
For 300 mm .984 ft.
For 50 mm .164 ft.
10
.656
.164
10
.394
10
10
.394 5
.197
.394
10
.394
10
5
0 5
.197
.197
Operating range (mm)
(inch)
5 .394
0
5
.197
5
0
.394
.197 Operating range (mm)
(inch)
.197
Operating range (mm)
(inch)
2. Projector beam diameter characteristics
Light beam diameter is determined as the region where the amount of light is decreased to 1/e2 (e]2.72) when the largest amount of light is
assumed as 1.
MQ-W3 types
MQ-W20 types
MQ-W70 types
2.5 dia. 2.3 dia. 4.0 dia. (mm
.098 .091 .157 inch)
23.0 dia. 33.0 dia. 39.0 dia. (mm
.906 1.299 1.535 inch)
6.7 dia. 6.9 dia. 7.4 dia. 8.3 dia. (mm
.264 .272 .291 .327 inch)
0
50
.164
100
.328
150
.492
200 (mm ft.)
.656
0
300
.989
500
1.641
700 (mm ft.)
2.287
0
20
30
40 (mm ft.)
.066 .098 .131
3 Detectable target characteristics
MQ-W3 types
MQ-W20 types
MQ-W70 types
Distance setting 700 mm
2.297 ft.
700
Distance setting 40 mm
.131 ft.
2.297
40
Standard target
.131
Standard target
600
(white drawing paper 75×75 mm
2.953×2.953 inch)
(white drawing paper 10×10 mm
.394×.394 inch)
1.969
Distance setting 200 mm
.656 ft.
Standard target
(white drawing paper 20×20 mm
.787×.787 inch)
500
200
1.641
.656
Distance setting 30 mm
Distance setting 400 mm
30
400
.098 ft.
1.312 ft.
.098
1.312
300
Distance setting 100 mm
.984
100
.328 ft.
Distance setting 200 mm
.656 ft.
.328
200
Distance setting 20 mm
.066 ft.
.656
20
Distance setting 40 mm
.131 ft.
.066
100
.328
0
0
10
0.015
100
0
100
0.155
1000
1.55
1,000
1.55
10,000
15.5
0.155
Target size (mm2 inch2)
Target size (mm2 inch2)
Target size (mm2 inch2)
4. Material characteristics
Comparision between MQ-W20A and former product
Condition: Target (40ꢀ60 mm 1.575ꢀ2.362 inch),
target assumed as natural shape
For the former product (diffuse reflective type),
depending upon the object material, the operating
range varied greatly, but for the triple beam type
there a little variation.
MQ-W3 types
Condition: Target (40ꢀ60 mm 1.575ꢀ2.362
MQ-W20 types
Condition: Target (40ꢀ60 mm 1.575ꢀ2.362
inch), natural shape
inch), natural shape
White
drawing
paper
White
drawing
paper
White drawing
paper
Former pruduct
Black
drawing
paper
Black
drawing
paper
Corrugated
carton
Triple beam type (MQ-W20A)
Veneer panel
Veneer panel
Veneer panel
Corrugated
paper
Corrugated
paper
×
×
Black rubber
Black rubber
Black rubber
Black frosted
finish
Copper clad
printed circuit
board
Copper clad
printed circuit
board
Copper clad
printed circuit
board
White acrylic
Blue acrylic
Mirror
White acrylic
Blue acrylic
Mirror
Aluminum
panel
Mirror
10
.033
20
.066
30
.098
40
.131
100
200
300
400
500
600
50
.164
100
.328
150
.492
200
.656
.328 .656 .984 1.132 1.641 1.969
Distance range (mm ft.)
Distance range (mm ft.) × : Impossible
Distance range (mm ft.)
182
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MQ-W
DIMENSIONS mm inch
Outline dimensions
Dimensions with the mounting bracket**
attached
1. MQ-W3 types
Adjustment indicator LED
12.6 12.2
.496 .480
4.2 DIA.
(17)
(.669)
10.7
.165
.421
4.4
Distance adjustment dial
3.3
Operation indicator LED
.173
3.3
2.2
4.4
.130
.130
.087
25.4 0.2
.173
2-M4 (P = 0.6) tapped
M.S.:* M4 or #6
24.4
1 inch
7.3
.287
6.3
(1 inch)
1
.039
.248
6.3
.248
32
1.260
6.3
.248
25.4 0.2
1 inch
44.8
1.764
11.7
.461
3.3
24
.945
.130
10.9
.429
4
16.6
.654
25.4
4
General tolerance:
0.5 .020
1.4
.157
.157
.055
1 inch
2. MQ-W20 types
Outline dimensions
Dimensions with the mounting bracket**
attached
Adjustment indicator LED
12.6 12.2
.496 .480
4.2 DIA.
.165
(17)
(.669)
10.7
.421
Distance adjustment dial
Operation indicator LED
4.4
.173
2.2
3.3
.130
3.3
.130
4.4
.173
(1 inch)
.087
24.4
25.4 0.2
1 inch
7.3
.287
6.3
2-M4 (P = 0.6) tapped
M.S.:* M4 or #6
.248
1
.039
7.5
.295
25.4 0.2
7.5
1 inch
32
44.8
.295
1.260
1.764
10.5
.413
3.3
24
.945
.130
10.9
.429
16.6
.654
4
4
.157
1.4
.157
.055
General tolerance:
0.5 .020
25.4
1 inch
3. MQ-W70 types
Outline dimensions
Dimensions with the mounting bracket**
attached
Adjustment indicator LED
4.2 DIA.
.165
18.6 18.2
.732 .717
(22)
(.866)
12.7
.500
45.0
Distance adjustment dial
Operation indicator LED
4.4
.173
1.772
4
3.5
.138
3.5
45 0.2
1-49/64
.157
.138
4.4
.173
4.5 DIA.
.177
9.1
.358
1
.039
8.1
.319
44
(1-3/4 inch)
2-M4 (P = 0.6) tapped
M.S.:* M4 or #6
13
.512
52
2.047 45 0.2
1-49/64
13
.512
12.5
.492
15.5
.610
68.2
2.685
3.5
12.5
.492
.138
24
12.4
.488
.945
1.6
.063
17.4
.685
36.6
1.441
General tolerance:
0.5 .020
*M.S.: mounting screw
45
1-49/64
**The mounting bracket is enclosed in the inner carton.
CONNECTING DIAGRAM
Make connection to B side with pink wire for
Light ON
Operating condition
With light
Make connection to v side with pink wire for
Dark ON
Output tran- intercepted ON
Common use
sistor
With light
Note: When switching a power source, make
ground connection to the frame ground termi-
nal or to the ground terminal. This will assure
more stable operation.
entering ON
Operation
indicator LED
Lights with light entering
183
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MQ-W
OPERATING PRINCIPLES
Detection principle of new triple beam area reflective series
$ Optical triangulation sensing method
The light beam projected by the LED,
passing through the condensing lens of
the light projector, is applied to the sur-
face of the target to be detected. One
part of the diffused reflected light rays
passes through the light receiver lens
producing a spot on the position sensi-
tive device. When the detectable target
is at a position A that is at a compara-
tively near distance as shown in Fig. 1,
a spot is produced at (a). When the tar-
get is at a position B that is far, a spot
is produced at (b). Accordingly, if any
spot position on the position sensitive
device is detected, the distance to the
target can be determined. This is the
principle of optical triangulation range
measurement.
Fig. 1 Optical triangulation range
measurement method
Other examples of this method are
the automatic focusing and camera
range measurement systems.
$ Triple beam type range sensing principle
The MQ photoelectric sensor area
reflective type has adapted this optical
triangulation range measurement prin-
ciple, but in order to improve the relia-
bility of the detection of the sensor, a
more elaborate method has been
devised. First, light receivers are posi-
tioned symmetrically on either side of
the axis of the light projector, compos-
ing a triple beam arrangement. As
shown in Fig. 2, when the moving
detectable target is at the edge of the
projected light beam, the spot reflected
from the target is at a location different
from the point where the spot is pro-
duced when the beam is completely
intercepted, generating a range mea-
surement difference of +∆X, but with
the triple beam composition, the sym-
metrically arranged position sensitive
device (2) has a spot produced con-
versely at a –∆X difference position,
and by means of averaging both range
measurement signals, the correct range
measurement can be made. This
results in significantly improved
repeatability and background suppres-
sion.
Fig. 2 Triple beam range measure-
ment method
By averaging the range measure-
ment signals of the 2 light receiving
systems, the range measurement
difference is cancelled.
$ Optical system of the triple beam photoelectric sensor
In the MQ photoelectric sensor area
reflective type, it is necessary to give
special consideration to the lens. In
order to improve the precision, an
aspherical lens, having limited spherical
and coma aberration, is used.
In addition, as shown in Fig. 4, a photo
diode having 2 output terminals is used.
By comparing the output currents from
the 2 PSDs, there is no relationship to
the level of the incident light. Thus, the
ratio of reflection from the detectable
target exerts no influence and the
range measurement and detection can
be interpreted accuracy.
Fig. 3 Light beam trace of the lens
Fig. 4 PSD (position sensitive
device) construction
By making a calculation of the ratio
(a) is a spherical lens, and (b) is the
aspherical lens. Because there is no
aberration in (b), range measure-
ment precision is high.
of I
1
and I , the light spot position
2
can be detected.
$ Operating principle of area reflective method
The operation of the MQ photoelectric
sensor area reflective type is explained
in Fig. 5. After the output from the 2
PSD elements is added, the I/V value is
converted and the logarithm deter-
mined. By subtraction, the distance sig-
nal in (I
1
/I ) is obtained. This can be
2
optionally set, and with the distance
adjustment control, comparison with the
produced value can be made to detect
whether the target is or is not within the
distance range.
Fig. 5 Signal processing circuit block diagram
184
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MQ-W
CAUTIONS
3) If a load greater than 100 mA is con-
nected, the output section will be
damaged, so sufficient care should be
taken.
4) If the wiring to the photoelectric sen-
sors run parallel to high voltage or
power lines, due to inductive noise,
mis-operation or damage can occur.
Wiring should be run in separate.
5) Wire 0.3 mm2 .0005 inch2 AWG22 or
larger should be used for wiring up to a
length of 100 m 328 ft..
6) When the photoelectric sensors
being mounted, if the unit is struck by a
hammer or other heavy tool, the func-
tion can be impaired. Sufficient care
should be taken.
7) The changeover from Light-ON (light
entry ON) to Dark-ON (light intercepted
OFF) can be carried out with the pink
lead wire. For Light-ON, connect the
pink wire to the B side, and for Dark-
ON, connect the pink wire to the v
side.
These products are not
Adjustment
Distance adjustment dial
indicator LED
safety sensors and are
not designed or intended
to be used to protect life
and prevent bodily injury
or property damage.
MQ-W3 type
MW-W20 type
Operation
Indicator LED
Adjustment
indicator LED
Distance adjustment dial
1. Ambient environment
1) Use within the range of ambient
temperature of –25 to +55°C –13 to
+131°F.
2) Use within a range of 9.6 V to 30 V
DC (ripple P-P included) for operating
voltage.
MQ-W70 type
Operation
Indicator LED
3) Use with an ambient light level at the
light receiving surface of less than
10,000 lux for incandescent lamp and
less than 30,000 lux for sunlight.
4) Use a surge absorber as the internal
circuit may be damaged if external
surge voltage exceeds 500 V
[ (1.2ꢀ50) µs of single polarity full-
wave voltage].
Notes:
1. If the adjustment indicator LED does
not light in the adjustment of 3) as pre-
scribed, or if the position between 2)
and 3) is less than 2 graduations,
change the position of the detection
surface and repeat the procedure of 1)
to 4), or try to determine the source of
external factors such as variation in
ambient temperature, variation in target
position, etc., that creating the problem.
2. The difference in detection distance
due to the colors of the target is virtual-
ly non-existent, but if the actual target is
one where the reflectivity is extremely
low (target which have a frosted finish
produced by black rubber), or where
the reflectivity is extremely high (mirror,
glass, or truly reflectting target), confir-
mation should be done with the actual
target.
3. Distance adjustment
1) Set the detecting surface of the pho-
toelectric sensor in the detecting direc-
tion and temporarily fasten it.
2) While no target in the detection
region, set the distance adjustment dial
to maximum (FAR) and slowly turn it
counterclockwise.
Continue turning the control counter-
clockwise until the operation indicator
LED (OPE.) is extinguished. This is the
adjustment position. If the indicator
LED is extinguished at the maximum
position, that is the adjustment position.
3) With target in the detection area, set
the dial in the minimum position
(NEAR) and turn the control clockwise
to locate the position where the indica-
tor LED turns ON. If the indicator LED
goes ON at the minimum position, then
NEAR is the adjustment position.
4) Set the control to a point midway
between the locations found in 2) and
3) above.
5) Avoid using in a location with high
concentrations of steam, dust, or corro-
sive gas.
6) The sensor is of immersion protected
type, but this does not mean that it can
be used in water or where there is
direct impingement of rain for detecting
objects.
4. Detector
1) Keep the detector surface clean as
excessive dust or dirt on the detector
surface will decrease the margin of the
distance range.
2) The front surface of the lens is made
of polycarbonate. This material is resis-
tant to water, weak acids and alkalis,
aliphatic hydrocarbons, oils, etc., but it
is not resistant to ketones, esters, halo-
genated hydrocarbons, or aromatic
hydrocarbons.
2. Connections
1) Check all wiring before applying
power since incorrect wiring may dam-
age the internal circuit.
5) Securely fasten the photoelectric
sensor. When fastening, the sensor
should be sufficiently secure so that it
will not shift under vibration of shock.
2) Use a load relay with a rated operat-
ing voltage of 12 V DC or 24 V DC. The
voltage applied to the load relay is the
operating voltage of the photoelectric
sensor minus the internal voltage drop
(1.2 V). Voltage fluctuations should be
taken into account.
185
03/2003
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