DISTANCE SENSOR
CM3-30 and CMP3-30
TECHNICAL MANUAL
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Contact information
Noptel Oy
Address:
Tel.:
E-mail:
Technical support:
Teknologiantie 2, FI-90590 Oulu, Finland
+358 40 181 4351
[email protected]
Web site: www.noptel.fi
Downloads:
Documents :
http://www.noptel.fi/eng/nms/index.php?doc=7_downloads/5_manuals&group=MSC
Software:
http://www.noptel.fi/eng/nms/index.php?doc=7_downloads/7_software&group=MSC
Firmware:
http://www.noptel.fi/eng/nms/index.php?doc=7_downloads/
Ask from [email protected]
Document Information :
Document Title:
Document Version:
Released:
Current printing
Document ID :
Document Status:
CM3 and CMP3 Technical Manual
1.4
05.06.2015
5.6.2015
N40840EE
Released
Measurement laser classification
The CM3-30 and CMP3-30 are classified in Finland in Laser class 1 according to the
international standard EN 60825-1:2007 (IEC 60825-1:2007).
Finnish Institute of Occupational Health, February 27, 2009
The national regulations in most countries usually require the equipment to be reclassified in the concerned country.
In Finland the transmitter has received the below described label as the proof of the
classification. The labels have to be made in the target country in accordance with the
national regulations.
CLASS 1 LASER PRODUCT
EN 60825-1:2007
Fig. 1.
Laser classification label for sensors without a laser pointer
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Laser pointer classification
Optional laser pointer is Class 3R (3A) laser product. A Class 3R laser is considered safe
if handled carefully, with restricted beam viewing. With the laser pointer, the maximum
permissible exposure (MPE) can be exceeded, but with a low risk of injury.
LASER RADIATION
AVOID DIRECT EYE
EXPOSURE
Laser beam
CLASS 3R LASER
PRODUCT
EN 60825-1:2007
Fig. 2.
Laser warning labels for sensors with the laser pointer.
Disposal
Do not dispose this product as unsorted municipal waste.
In the European Union all electrical and electronic products, batteries, and accumulators
must be taken to separate collection at the end of their working life.
Copyright Notice
Specifications, and implementation subject to change without notice due to continuous
research and development.
Copyright © 2013 Noptel Oy, Oulu, Finland
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1
2
Introduction ............................................................................................................................. 6
1.1
CM3-30 ..........................................................................................................................................6
1.2
CMP3-30 ........................................................................................................................................7
1.3
Basic connection ............................................................................................................................7
1.4
Measurement principle.................................................................................................................8
1.5
Reference point and aiming beam ...............................................................................................8
Structure................................................................................................................................... 9
2.1
Optomechanical structure ............................................................................................................9
2.2
Electronics .....................................................................................................................................9
2.3
Mechanical structure and casing ...............................................................................................10
2.4
Laser pointer (option) .................................................................................................................10
3
Operation................................................................................................................................ 11
4
Connection ............................................................................................................................. 13
5
Communication and software ............................................................................................... 17
5.1
CM Configuration Software ......................................................................................................17
5.2
CM_Win.exe ................................................................................................................................17
5.3
HyperTerminal............................................................................................................................18
6
Typical technical specifications ............................................................................................ 19
7
Dimensions............................................................................................................................. 20
8
Handling and maintenance ................................................................................................... 21
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1 INTRODUCTION
The CM3 and CMP3 laser distance sensors are designed for both portable and fixed
applications. They measure ranges from 3 to 30 metres in natural targets with poor
reflectivity (10%). If the reflectivity of the surface is between 40 to 90% the operating
range is two to three times longer. With a reflector the operating range is up to 380 metres.
The sensors are small and lightweight, and the airtight structure is meant to withstand
outdoor use in varying temperatures. The sensors can be connected to a control system
via RS-232 or RS-422 port, analogue output and digital I/O-lines.
Sensors are usable as a proximity switch, or a distance or a speed meter. They have
several operation modes:







ASCII mode (setup and distance measurement)
Binary mode (distance data in serial port in binary format)
Trigger window mode (proximity switch)
Speed measurement mode with one or two sensors
Vehicle classification
Capture mode (data collection into internal memory)
Continuous speed mode
Full descriptions about modes can be found in CM Distance Sensors Configuration
and API Guide.
1.1 CM3-30
Fig. 3.
CM3-30 Distance sensor
The optical distance meter with a narrow laser beam (1.9 mrad) is suitable for measuring
small targets. This sensor is also considered for distance triggering and speed
measurements with two sensors.
CM3 is a good choices for profile measurement applications. Thanks to the narrow beam,
it enables to measure even little details of the profile shape.
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1.2 CMP3-30
Fig. 4.
CMP3-30 Distance sensor
This measuring device with a wider laser beam (16 mrad) is suitable for measuring large
targets and reflectors, and enables speed measurements utilizing one sensor.
All measurement functions have been designed for both models (CM and CMP). Hence
the selection of the sensor depends on the opto-mechanical requirements in the
application.
1.3 Basic connection
The sensor is connected to a PC via a serial communication port using the accompanying
cable in the package. The cable has connector for the sensor at the one end and the
other end is open wired. Connection is made as shown in the tables in Chapter 4. An
adapter for RS232 to USB or RS422 to USB can be used. Furthermore an external power
supply for the sensor is needed. See voltage values in Chapter 6.
A triggering from the sensor could be used for external equipment (camera, other CM or
CMP sensor, etc.). Measured distance is also available as voltage of 0 to 4 V from
analogue output pin.
Camera, etc. (option)
Triggering (Digital Out)
Serial Port
Power Supply
Fig. 5.
Connection of the sensor to the computer. The camera is an option.
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1.4 Measurement principle
The sensor uses pulsed time-of-flight technology for distance measurement. In this
technology the short laser pulses are transmitted to the target and the reflected pulses
are received into the receiver detection electronics. The time between the transmitted and
received pulses is then calculated. The computing of time to distance is based on the
constant speed of light.
This principle allows very fast distance measurement with poorly reflecting targets. The
pulsing rate can be up to 6 kHz depending on the sensor version.
1.5 Reference point and aiming beam
Reference point
Fig. 6.
CM3-30 and CMP3-30 reference point
Measurement beam:
The reference point is in the back edge of the black front panel. The calibration has been
made in a 9-metre range to the target with reflectivity of 10%.
Pointer beam (option):
The pointer beam is directed parallel to the measurement beam. They are placed on the
opposite side of the front panel, and the difference between the centres of the beams is
47 mm. The receiver is in the middle.
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2 STRUCTURE
2.1 Optomechanical structure
CM3 and CMP3 have same order of optical transmitter, receiver and laser pointer.
Transmitter
Receiver
Pointer
Fig. 7.
Front view of CM3-30 Distance sensor
The effective lens diameters of CM3 are 20 mm. The effective receiver lens diameter of
CMP3 is 17 mm and transmitter 6 mm.
The laser beam of CM3 is horizontal and rectangular. The divergence is about
1.9 x 0.7 mrad, giving a beam size of about 60 x 20 mm at a 30 m range. Same
dimensions of CMP3 are 16 x 16 mrad and 480 x 480 mm at a 30 m. A focused beam of
CMP3 is available as an option (FB). The divergences are 15 x 2 mrad and dimensions
450 x 60 mm.
2.2 Electronics
The sensor consists of four (4) main parts:
 Controller electronics for distance calculation and user interface
 Time to Digital Converter
 Receiver and transmitter electronics
Receiver
Controller
Time to
Digital
Converter
Transmitter
Fig. 8.
Basic structure of electronics.
The electronics is highly integrated and includes Noptel's own ASIC's (Application
Specific Integrated Circuits) for time calculation and other internal operations.
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2.3 Mechanical structure and casing
The sensor has a very solid internal structure, and it withstands the harsh environment
conditions. The rear and front panels are connected by a special casing forming an airtight
structure. The front panel includes lenses and rear panel airtight connector and a nitrogen
valve. The sensor is nitrogen filled, allowing use in varying temperatures and
environments.
Do not open the cover or the valve in the rear panel. Opening them releases nitrogen and
may cause moisture problems inside the sensor.
The protecting class of the cable connector is IP50. If the sensor is used outdoors without
protective cover or cap, the cable connector should be protected using bend relief, which
raises the protecting class to IP65. In any case the cable should be mounted so that water
does not flow directly to the connector.
Fig. 9.
Cable alternatives and connection to the sensor.
2.4 Laser pointer (option)
All models are available with a separate built-in laser pointer. It is aligned parallel with the
transmitter beam.
The laser pointer does not show the exact point of measurement, but a point in the area
of measurement. It is intended to help the setting up of the sensor in fixed installations,
but can also be used as a pointer in portable use.
CAUTION! The pointer is CLASS 3R laser product.
AVOID DIRECT EYE EXPOSURE!
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3 OPERATION
The sensor has several operation modes. The mode is selected either in parameters or
by a command via the serial interface. The commands and their operation are explained
in CM Distance Sensors Configuration and API Guide.
0
ASCII mode / Configuration Mode
The sensor sends measurement results in ASCII format according to the user’s
commands and parameter settings. In this mode the sensor receives commands such as
parameter change and state control or operation mode selection.
1
Continuous ASCII mode
The sensor sends measurement results in ASCII format continuously according to the
parameter settings.
2
Continuous Binary mode
The sensor sends measurement data in binary format according to parameter settings
until <esc>.
3
Binary mode, HW controlled
The sensor sends measurement data in binary format according to parameter settings.
The measurement is controlled by the trigger-input-line.
4
Binary mode, serial controlled
The sensor sends measurement data in binary format according to parameter settings.
The measurement is controlled by serial communication.
5
Trigger window mode
The sensor controls the measurement results in the trigger window, and according to
parameters it gives trigger-output-signal and sends trigger distance to serial port. In this
mode the profile of the target can also be measured.
6
Speed measurement mode with two sensors
The sensor works as the second sensor and waits for the trigger-input-signal from the
first sensor. Having received the trigger signal, it waits its own trigger activation and
calculates speed using parameter values.
7
Speed measurement mode with one sensor
The sensor waits for the target to be in the trigger window and then starts measuring the
change of distance to the target in the selected window and calculates the speed of the
target.
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8
Capture mode, HW controlled
The sensor records 1000 samples into its memory having been activated by a trigger in
line and after the recording sends the values in ASCII format to the serial line.
9
Capture mode, serial controlled
The sensor records 1000 samples into its memory after activation via the serial
communication line. Results are sent in ASCII format to the serial line.
10
Continuous speed mode
In this mode the sensor gives speed values whenever it can detect movement in the
measurement range. The target may move into any direction. The mode gives accurate
speed values only if the shape of the target and the measurement geometry do not affect
the measurement. The best measurement results are achieved when the target is far, or
it is followed during the measurement.
11
Size mode
In this mode the sensor operates in the same way as in Mode 7, but the accurate speed
algorithm is not used. The mode is used to get rough classification data from traffic.
12
Multilane speed measurement mode
The mode is designed to be used at the side of the road on the level of vehicles. The
mode provides the possibility to catch the speeds of vehicles travelling on more than one
lane.
13
Movement trigger mode
In this mode the sensor gives a trigger when distance to a target changes. For example
the sensor can trigger to the opening of a door, but does not react to people passing
between the sensor and the door.
Power save mode:
The power save mode is intended for portable use, where battery life is limited. This mode
is not available in the 24-volt version. In ASCII mode the sensor automatically goes into
power save mode after each measurement (if not otherwise defined in parameters). Upon
start measurement command the sensor is activated, and it makes the defined
measurement and returns to the power save mode.
In Binary mode the power save mode is not in use.
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4 CONNECTION
The connector X1 (see Fig. 11) is used for user interface as communication, power,
analogue out, and digital I/O. Serial interface variations are RS-232 or RS-422. The
connector is airtight.
The connection is made by using the cable in the package. The one end of the cable is
open wired and it should be connected to the suitable connector according to the tables
below.
Fig. 10.
Connection cable.
X1 contact numbers of the I/O-connector and wire colours of the cable for RS-232:
X1
Pin no
1
2
3
4
5
6
7
Shield


Wire
Colour
White
Brown
Green
Yellow
Gray
Pink
Blue
Signal
+ U in (see technical specifications)
RS Gnd , U in Gnd
RS-232 Tx
RS-232 Rx
Trigger output
Analogue output
Trigger input
GND/case
D9 PC
Pin no
5
2
3
Trigger output (VOL< 0.5V,4.5V<VOH<5V, Rs=1kΩ, active low)
Trigger input (VIL<0.99V, VIH>2.31V, MAX 5V )
X1 contact numbers of the I/O-connector and wire colours of the cable for RS-422:
X1
Pin no
1
2
3
4
5
6
7
Shield


Wire
Colour
White
Brown
Green
Yellow
Gray
Pink
Blue
Signal
+ U in (see technical specifications)
Gnd
RS-422 Rx+
RS-422 RxRS-422 Tx+
RS-422 TxTrigger input/output **)
GND/case
D9 PC
Pin no
7
3
4
8
Trigger input
(VIL<0.99V, VIH>2.31V, MAX 5V )
RS-422 maximum common mode voltage = -0.5 to 5 V
Note: Digital and analogue outputs are not available with RS-422 serial interface.
An example of cable connector type: FGG.1B.307.CLAD62 (Lemo)
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**) Direction of Trigger input/output depends on operation mode:
Operation mode
1
2
3
4
5
6
7
8
9
Description
Normal mode
Binary mode
Binary mode with HW triggering
Binary mode with serial triggering
Trigger window mode
Speed measurement mode with two sensors
Speed measurement mode with one sensor
Capture mode with HW triggering
Capture mode with serial triggering
X1
Fig. 11.
X1
X2
Direction
Input
NA
Input
NA
Output
Input
Output
Input
NA
X2
Rear view of CM3-30 and CMP3-30 sensors.
User interface (connector type EEG.1B.307.CLN, mfg. Lemo)
Valve (do not open, used only in authorised service)
Schematic diagrams of I/O connections and ESD protections are presented in next two
pages.
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5 COMMUNICATION AND SOFTWARE
The sensor uses RS-232 communication and one COM port in the PC. The main principle
is that the sensor is part of the user's system and it is controlled by the user's program
using commands presented in CM Distance Sensors Configuration and API Guide. The
sensor can be controlled with a suitable terminal program supporting COM ports. For
example HyperTerminal in Windows, PC-Plus and similar ones can be used. Windows
95/98 as well as Win XP work normally well with COM ports. Win 2000 may however
present some problems.
You can also use one of Noptel’s software if they can be used in your computer.
5.1 CM Configuration Software
CM Configuration Software was made for configuring the sensor and testing the
operation. Furthermore, it makes automatic setting of measurement window easier in
triggering and speed measurement applications.
The configuration can be stored into working or permanent memory of the sensor.
Furthermore storing into file and reading from file are possible.
Software can be downloaded from http://www.noptel.fi
5.2 CM_Win.exe
This Windows software is dedicated for simple graphical representation of the
measurements results with the CM3 or CMP3 sensors. It may have some problems in
Win2000 in the serial port handling. In Win 95/98 and XP it should work well. The program
operates in both ASCII and Binary mode, and it was designed exclusively for experiment
use.
Software can be downloaded from http://www.noptel.fi
PROGRAM MENUS:
CM Win:
The CM Win menu is dedicated for communication and measurement settings and event
handling. The user is able to change COM port number, measuring interval, filtering and
sounds for distance, speed, and acceleration. In the events table the user can set limits
for measurement. If the measured distance is within these limits, the software will give a
sound signal or run the program the user has selected.
Views:
The Views menu is dedicated for selecting different display methods. Metre displays show
the distance, speed, and acceleration which also have their own chart displays.
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Reports:
The Reports menu is dedicated for printing and saving session measurements.
5.3 HyperTerminal
Hyper terminal (or other similar terminal programs) can be used to see the measurement
results in a ASCII form, to change parameter settings, to select operation mode, and to
save the data. Follow the instructions of the software supplier. The connection works in
all Windows systems, 95/98/2000/XP, etc.
The user is able to control the sensor in HyperTerminal by defining the communication
parameters according to sensor parameters and by selecting the used COM port in
File/Properties. The connection is activated and deactivated by Call and Disconnect.
Measurement data recording starts after defining the file name in Transfer/Capture text
where recording can also be stopped. Definitions can be stored and later on recalled
automatically.
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6 TYPICAL TECHNICAL SPECIFICATIONS
Distance range 1)
Distance range 2)
Beam divergence
Linearity @3 - 30 m, R = 10%
Precision, single shot 3)
Repeatability 4)
Temperature drift
Long term stability
Operating temperature
Supply voltage 8) 11)
Power consumption, 9) @ full speed
Measuring rate 5)
Wave Length 6)
Weight
Protection
Size (H/L/W)
Laser class 7)
Interface RS-232
Digital Input
Digital Output
Analogue Output
Interface RS-422 (opt.) 10)
Digital Input or Output
1)
2)
3)
[m]
[m]
[mrad]
[mm]
[mm]
[mm]
[mm]
[mm]
[°C]
[V]
[W]
[kHz]
[nm]
[g]
[mm]
[V]
CM3-30
3 - 50
3 - 380
1.9
± 50
5 - 20
1-5
10
10
-20 - +50
8.0 - 30.0
2.9 – 2.1
Up to 3.2
905
375
Nitrogen filled
36/132/78
1
1
1
1
0…4
1
1
CMP3-30
1 - 50
1 - 380
16
± 50
5 - 20
1-5
10
10
-20 - +50
8.0 - 30.0
2.9 - 2.1
Up to 3.2
905
300
Nitrogen filled
36/82/78
1
1
1
1
0…4
1
1
Natural surface with 28% reflectivity (R).
Minimum distance can be down to 0.5 m but it can reduce the accuracy. With a target of >90%
reflectivity (white surface) the measuring range is 0...80 m.
ER-versions are available as an option. The distance ranges are up to 75 m with R = 28%.
Reflector or prism
Depending on the distance to the target and target reflectivity
1
Precision depends on averaging by multiplier .
√𝑁
4)
5)
6)
7)
8)
9)
10)
11)
N = quantity of measurements
Depending on the measurement speed and target
Higher measuring rates are available as an option
Wavelength of the optional laser pointer is about 650 nm
Optional laser pointer is of laser class 3R
Minimum power consumption is at 15 V and maximum at 8 V
Pointer on 0.2 W more is needed
RS-232 and RS-422 are alternatives
Special version supply voltage 5 – 13 V
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7 DIMENSIONS
CM3-30
CMP3-30 is otherwise similar, but the length of the sensor is 82 mm
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8 HANDLING AND MAINTENANCE
The sensor is protected against environmental hazards, (rain, dust, snow, vibration, etc.),
but as an optoelectronic equipment it requires careful handling and maintenance.
Sunshine and rain protection
The sensor has to be protected from direct sunshine and rain. Water on the lenses
reduces the power of measuring signal.
ESD protection
An extra protection near the sensor is needed at outdoor assemblies.
Storage
When the system is not in use, it is recommended to keep the equipment in a safe place,
protected from dust, moisture and mechanical shocks, or when it is not possible remove
the sensors from their installation bases and keep them in their own protective covers.
Cleaning the optical surfaces
When starting measurement, it is recommended to clean the optical surfaces from dust
and moisture, which might appear during transportation or storage.
Handling
The sensor includes optical parts, electronics, and precision mechanism. Handle the
sensor with care, do not drop it on the ground, and avoid all unnecessary mechanical
shocks to the sensor.
Connectors and cable
The sensors have an electrical connector on the rear panel. The connector is of rugged
type and weatherproof. Avoid dust and moisture penetrating into the connector and
causing bad connection in the signal lines.
At outdoor assemblies a bend relief (GMF.1B.062.072EN) for cable connector is needed.
It’s strongly recommended to turn the cable downwards as near to the sensor as possible
so that trickle water doesn’t penetrate into the connector (see Fig. 12).
Fig. 12.
Recommendation of the cable curvature.
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Limited Warranty
The product has been thoroughly tested and inspected before shipment. All parts
(excluding accumulators) are warranted to be free of defects in material and workmanship
for one (1) year from the date of the shipment.
The Warranty is always subject to the concurrence of the following three conditions:
 (1) No claims under this Warranty will be honoured unless notice of a defect
affecting any specific item of Products is given to Noptel within the warranty
period; and
 (2) Any specific item of Products considered by the Buyer to be covered by this
Warranty shall be returned, at the Buyer’s cost, to Noptel Oy together with a
copy of sale document showing the date of purchase within one (1) month from
the day of notice as set out above; and
 (3) Noptel Oy shall find such an item of Product returned to Noptel Oy as set
forth above defective due to faulty workmanship or use of defective materials.
If Noptel Oy finds the Product to be defective, Noptel Oy’s liability under this Warranty is
limited to repair or replacement of the Product free of charge, Ex Works (EXW), Oulu,
Finland, or credit for an amount equal to the invoiced value of the defective Product.
 When sending a Product for the repair, please attach an explanation of the
defect to the shipment in order to expedite and facilitate service.
 This Warranty excludes all consequential damages.
 The Warranty will terminate, if an unauthorised person opens the sensors
during the warranty period.
 This Warranty does not cover defects caused by misuse or improper handling,
installation or maintenance of the products.
 Always follow the rules and hints for the proper handling and maintenance
given by the manufacturer. The sensors contain no user serviceable parts.
Manufacturer or dealer is not liable for damages caused by erroneous
measurements or inadequate treatment.
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DISTANCE SENSOR
CM3-30 and CMP3-30
TECHNICAL MANUAL
Contact information
Noptel Oy
Address:
Tel.:
E-mail:
Technical support:
Teknologiantie 2, FI-90590 Oulu, Finland
+358 40 181 4351
[email protected]
Web site: www.noptel.fi