Dynavision B Series User manual

B-Series B800 Sensor
Version 5.1.4.4

2
Copyright, © 2006, LMI Technologies, Inc. All rights reserved.
Proprietary
This document, submitted in confidence, contains proprietary information which shall not
be reproduced or transferred to other documents or disclosed to others or used for
manufacturing or any other purpose without prior written permission of LMI Technologies
Inc.
No part of this publication may be copied, photocopied, reproduced, transmitted,
transcribed, or reduced to any electronic medium or machine readable form without prior
written consent of LMI Technologies, Inc.
Trademarks and Restrictions
DynaVision, chroma+scan®, Selcom®, FireSync®, and Sensors That See® are
registered trademarks of LMI Technologies, Inc. Any other company or product names
mentioned herein may be trademarks of their respective owners. Information in this
manual is subject to change.
This product is designated for use solely as a component and as such it does not comply
with the standards relating to laser products specified in U.S. FDA CFR Title 21 Part
1040.
LMI Technologies, Inc.
1673 Cliveden Ave.
Delta, BC V3M 6V5
Canada
Telephone: [phone]
Facsimile: [phone]
www.sensorsthatsee.com

3
Table of Contents
1Overview .................................................................................................................4
2Laser Safety............................................................................................................6
2.1 General Information ..........................................................................................6
2.2 Laser Classification...........................................................................................7
2.2.1 Laser Classes ..........................................................................................7
2.2.2 User Precautions & OEM Responsibilities................................................8
2.2.3 Class 3B/lllb OEM Responsibilities...........................................................8
2.3 Requirements on laser systems sold or used in the USA ................................10
2.4 B800 laser safety specification........................................................................10
3Sensor Description ..............................................................................................11
3.1 General ...........................................................................................................11
3.2 Performance Specifications.............................................................................11
3.3 Electrical Power Requirements .......................................................................11
3.4 Dimensions .....................................................................................................12
4Maintenance .........................................................................................................13
4.1 Preventative Maintenance Procedures............................................................13
4.2 Welding and the Scanner Frame.....................................................................13
5Connecting the Hardware....................................................................................14
5.1 Connection Overview ......................................................................................14
5.2 Mounting .........................................................................................................15
5.2.1 Sensor Positioning .................................................................................15
5.2.1.1 Relative to the Target...................................................................................... 15
5.2.1.2 Relative to other sensors ................................................................................ 16
5.2.2 Chain Spacing........................................................................................17
5.3 Cabling/Power.................................................................................................19
5.3.1 Connector and Cable Part Numbers.......................................................20
6OEM Design..........................................................................................................21
6.1 Design Requirements......................................................................................21
6.1.1 System Calibration .................................................................................21
6.1.1.1 Determine Laser Alignment Offset/Delay........................................................ 21
6.1.1.2 Determine Range Offset ................................................................................. 21
6.2 Design Recommendations ..............................................................................22
6.2.1 Sensor Mounting....................................................................................22
6.2.2 Baffle Plates...........................................................................................22
6.2.3 Photocells ..............................................................................................23
6.2.4 Scanner Frame ......................................................................................23
7Getting Started .....................................................................................................24
7.1 Powering up....................................................................................................24
7.2 Connecting......................................................................................................25
7.3 Sensor Diagnostics .........................................................................................26
7.4 Application development .................................................................................26
7.5 Ranges ...........................................................................................................27
8Warranty ...............................................................................................................28
8.1 Warranty policies.............................................................................................28
8.2 Return policy...................................................................................................28
9Getting Help..........................................................................................................29

Section 1
1 Overview
The DynaVisionB800 sensor by LMI Technologies Inc. is designed for use in a lumber
profile scanner to supply a 3 dimensional profile for lumber recovery optimization. B800
based scanning systems are primarily designed to provide true shape, 3D
measurements of lumber to enable computerized optimization of lumber processing
centres such as edgers, trimmers, and sorters.
Raw boards are fed through the scanner using cross-transfer mechanism such as chains
equipped with lugs. Each set of lugs "pushes" a raw board (flitch) through the scanner.
Travel distance is measured using an opto-mechanical encoder attached to the motor.
While the flitch is traveling under the scanner, each encoder pulse triggers the sensor to
take range measurements at intervals of 3.00" along the length of the target. These
measurements are retrieved by a NetPowerHub interface module, stored in it’s internal
data buffers and made available to the scanner computer once the target board
completely passes through.

5
Access to the sensor data is based on standard TCP/IP and UDP Ethernet network
protocol allowing the DynaVisionB800 to be interfaced to many hardware and OS
platforms.
Each B800 sensor provides data for a 2 foot (610 mm) section (the length of each B800
sensor) of the material to be scanned. The sensors may be mounted above and below
the target (Top/Bottom scanning) or above the target only (Top only scanning).
Top/Bottom scanning allows true thickness measurements at each laser beam. Top
only scanning provides thickness profiles at each laser beam relative to an arbitrary fixed
reference point.
The sensors are designed to be used in conjunction with the NetPowerHub (NPH) and
the MBstation which collects measurements from all installed heads and stores them for
use by the client’s computer. A fully populated NetPowerHub permits top/bottom
scanner designs of up to 24 feet (6.1 m) and 48 feet (12.2 m) for top only systems.
The B800 sensor generates measurement samples at 2 kHz. Each pulse generated by
an encoder connected to the NetPowerHub/MBstation, causes the current range
readings for all heads on the frame (scan line) to be collected.
B800 sensors are kept in synch with one another via a synchronization signal that is
transmitted from the NetPowerHub/MBstation to each sensor. This ensures that the
range data sampled at the same point in time across the board.
The following components are available from LMI Technologies Inc.:
B800 sensors laser-based distance sensors.
NetPowerHub/MBstation Distributes individually fused power and serial
communications to the B800 heads.
B-series Software CD CD-ROM containing software libraries, system
installation, diagnostic and demonstration
programs, and software documentation.
The following may be ordered directly from DNA Cables of Burnaby, BC, Canada
(ph: 604-439-1099) or LMI :
Integrated Power Cable Connectorized cable for power and serial
communications.

Section 2
2 Laser Safety
2.1 General Information
The laser light sources used in LMI Sensors are semiconductor lasers emitting visible
light.
LMI Laser Sensors have a 2/ll, 3R/llla or 3B/lllb classification depending on model.
Class 2/ll and 3R/llla sensors are referred to as “products” indicating that they fully
comply with the standards relating to laser products specified in IEC 60825-1 and U.S.
FDA CFR Title 21 Part 1040 except for deviations pursuant to Laser Notice No. 50,
dated July 26, 2001.
Class 3B/lllb sensors are sold only to qualified OEM’s as “components” for incorporation
into their own equipment. The sensors do not incorporate safety items which the OEM is
required to provide in their own equipment (e.g. remote interlocks, key control). As such
these sensors do not fully comply with the standards relating to laser products specified
in IEC 60825-1 and FDA CFR Title 21 Part 1040.
Caution!
Use of controls or adjustments or performance of procedures other than
those specified herein may result in hazardous radiation exposure.

7
1. International Standard IEC 60825-1 (2001-08) Consolidated edition, Safety of
laser products – Part 1: Equipment classification, requirements and user’s guide
2. Technical Report TR 60825-10, safety of laser products – Part 10. Application
guidelines and explanatory notes to IEC 60825-1
3. Laser Notice No. 50, FDA and CDRH http://www.fda.gov/cdrh/rad-health.html
2.2 Laser Classification
2.2.1 Laser Classes
Class 2/ll laser products:
Class 2/ll laser products would not cause
permanent damage to the eye under
reasonably foreseeable conditions of
operation, provided that any exposure can
be terminated by the blink reflex (assumed
to take 0.25 sec). Because classification
assumes the blink reflex, the wavelength of
light must be in the visible range (400 nm to
700 nm). The Maximum Permissible
Exposure (MPE) for visible radiation for 0.25
second is 25 Watt per square meter, which
is equivalent to 1 mW entering an aperture
of 7 mm diameter (the assumed size of the
pupil).
Class 3R/llla laser products:
Class 3R/llla laser products emit radiation
where direct intrabeam viewing is potentially
hazardous, but the risk is lower than for
3B/lllb lasers. Fewer manufacturing
requirements and control measures for
users apply than for 3B/lllb lasers.
Class 3B/lllb laser components:
Class 3B/lllb components are unsafe for eye
exposure. Usually only ocular protection
would be required. Diffuse reflections are
safe if viewed for less than 10 seconds.
Labels reprinted here are
examples relevant to the laser
classes. For detailed
specifications observe the label
on your laser sensor

8
2.2.2 User Precautions & OEM Responsibilities
The specific user precautions as specified in IEC 60825-1 and FDA CFR Title 21 Part
1040 are:
Requirements Class 2/ll Class 3R/3a Class 3B/3b
Laser safety officer Not required Not required Required
Remote interlock Not required Not required Required**
Key control Not required Not required
Required**
Cannot remove key
when in use
Beam attenuator Not required Not required Required**
Emission indicator Not required Not required Required**
Warning signs Not required Not required Required**
Beam path Not required Terminate beam at
useful length
Terminate beam at
useful length
Specular reflection Not required
Prevent
unintentional
reflections
Prevent unintentional
reflections
Power-On delays Not required Not required Required**
Eye protection Not required Not required Required under
special conditions
Training Not required
Required for
operator and
maintenance
personnel
Required for operator
and maintenance
personnel
LMI Class 3B/lllb laser components do not incorporate the safety items indicated by an
asterisk ** in the table above. These items must be added and completed by the OEM
in the system design.
2.2.3 Class 3B/lllb OEM Responsibilities
LMI Technologies has filed reports with the FDA to assist the OEM in achieving
certification of their laser products. The OEM can reference these reports by an
accession number that will be provided upon request.

9
A detailed description of the safety items that must be added to the OEM design is listed
below:
Remote Interlock
A remote interlock connection must be present in Class IIIB laser systems. This permits
remote switches to be attached in serial with the keylock switch on the controls. The
deactivation of any remote switches must prevent power from being supplied to any
lasers.
Key Control
A key operated master control to the lasers that prevents any power from being supplied
to the lasers while in the OFF position. The key can be removable in the OFF position
but the switch must not allow the key to be removed from the lock while in the ON
position.
Beam Attenuators
A permanently attached method of preventing human access to the laser radiation other
than switches, power connectors or key control must be employed. On some LMI laser
sensors, the beam attenuator is supplied with the sensor as an integrated mechanical
shutter.
Emission Indicator
It is required that the controls that operate the sensors incorporate a visible or audible
indicator when power is applied and the lasers are operating. If distance (>2 m between
sensor and controls) or mounting of sensors intervenes with observation of these
indicators, a second power-on indicator should be mounted at some readily observable
position. When mounting the warning indicators, it is important not to mount them in a
location that would require human exposure to the laser emissions.
Power-On Delays
A delay circuit is required that illuminates warning indicators for a short period of time
prior to supplying power to the lasers.

10
Warning Signs
Laser warning signs must be located in the vicinity of the sensor such that they will be
readily observed. Examples of laser warning signs are:
2.3 Requirements on laser systems sold or used in the USA
The OEM’s laser system which incorporates laser components or laser products
manufactured by LMI Technologies requires certification by the FDA.
It is the responsibility of the OEM to achieve and maintain this certification.
OEM’s are recommended to obtain the information booklet Regulations for the
Administration and Enforcement of the Radiation Control for Health and Safety Act of
1968: HHS Publication FDA 88-8035.
This publication, containing the full details of laser safety requirements, can be obtained
directly from the FDA, or downloaded from their website at http://www.fda.gov/cdrh.
2.4 B800 laser safety specification
Laser Classification: 3B/IIIb laser component
Peak Power: 100mW
Emitted Wavelength: 660nm
FDA Example IEC Example

Section 3
3 Sensor Description
3.1 General
Each sensor projects 8 laser beams onto a target surface at 3" (76.2 mm) spacing.
Each beam produces a laser spot which is detected by one or both integrated CCD line
cameras and the respective target range is calculated using the triangulation method.
The arrangement of the cameras allows ranges to be calculated for all lasers at the
actual scan rate of the CCD without overlapping spots.
The B800 sensor uses only solid state components including solid state lasers.
Reliability is improved by avoiding the use of beam splitters, spinning mirrors, or other
mechanical devices. All components are mounted in a solid aluminum CNC machined
package which can be installed directly in the sawmill environment.
3.2 Performance Specifications
Standoff Distance 17” (432mm)
Measurement Range 14” (356mm)
Measurement Resolution ±0.008"
3.3 Electrical Power Requirements
B800 sensor - +15 to +24 VDC (600mA @ 24VDC)

12
3.4 Dimensions
1

Section 4
4 Maintenance
The sensor does not contain any user serviceable parts! Any attempt to open the unit
may damage it and will void the warranty.
As an optical apparatus, it is critical that the internal space within the sensor remains
clean and moisture free. Therefore, all servicing of the sensor must be performed at
LMI’s manufacturing facility in a controlled environment.
4.1 Preventative Maintenance Procedures
Since the DynaVisionsensors operate optically, the primary maintenance procedure is
keeping the heads clean of sawdust, oil and pitch. The following maintenance tasks
should be performed regularly to keep the system in good working order.
•Turn power off prior to cleaning sensors!
•Using clean air, blow off the top and bottom head baffle plates and sensors. Do
not use any air which may contain water or oil as it may coat the glass lenses on
the sensors, resulting in scanning errors.
•Clean the glass windows on each sensor using a soft, lint free cloth and isopropyl
alcohol.
Do not pressure wash the sensors as this can cause severe damage.
4.2 Welding and the Scanner Frame
DynaVisionsensors are optical apparatus, and care must be taken to ensure that
nothing affects their optical performance.
The camera used inside each sensor can be damaged by very intense light.
Additionally, the debris generated while welding is normally hot enough to mar or imbed
itself in the surface of the glass lenses covering the lasers and camera. Therefore, it is
recommended that the sensor heads are shielded before any welding takes place in a
close proximity of the scanner frame

Section 5
5 Connecting The Hardware
5.1 Connection Overview
Figure 5.1 – Bx00 to MB Station Connection
MBstation/NPH-66
Bx00 Sensors
Encoder
Input
DC
Power In
Ethernet
Cable
Photocell
Input
Bx Cable

15
5.2 Mounting
The sensors are held in place at three points (mounting holes). It’s suggested that the
sensors be mounted onto studs attached to the frame rather than bolted directly to the
frame itself. This allows the installation of shims to aim the scan head in case the frame
is not aligned correctly. You should be able to pivot all sensors so that they can be
aligned such that the top and bottom pairs have their lasers shining directly into each
others windows.
5.2.1 Sensor Positioning
5.2.1.1 Relative To The Target
The B800 sensor field of view for taking measurements starts at a distance of 17” from
the face of the sensor (Measurement Offset) and extends 14” (Measurement Range).
Depending on the possible sizes of the target material and whether or not the system will
be a Top-only or Top-Bottom scanner, this will influence the distance to place the
sensors above and/or below the material transfer. Keep in mind that the closer the
sensors are placed to the transfer, the greater the opportunity for objects to occlude the
view of one or more of the sensor’s cameras.
For many applications, the sensors are positioned about 23 inches away from the top of
the transfer chain. This reduces the chance of an occlusion occurring and places the
target in the middle of the scanning range of the sensor. For Top-Bottom scan systems,
this creates an overlapping scan area
Figure 5.2 – Top-Bottom sensor showing the overlapping scan area

16
5.2.1.2 Relative To Other Sensors
For optimum performance sensors should be mounted so their position is offset by a
minimum of ½ inch from the sensors immediately adjacent to them. This ensures each
sensor’s cameras have a clear field of view of only it’s own lasers.
For systems with both Top and Bottom mounted sensors, each Top-Bottom pair of
sensors should have the same offset distance.
The diagram below illustrates the relative positioning of sensors in a system.
Figure 5.3 – B800 sensor offset (staggering) configuration
In Top-Bottom scanner systems, each Top-Bottom pair of sensors should be positioned
so that the lasers are pointed directly into the aperture windows of the opposing sensor.
The mounting holes of the B800 heads have been slotted to allow precise side to side
positioning to align opposing lasers.

17
5.2.2 Chain Spacing
Any chains that run between B800 sensors (2 foot centers) must have chain guides as
narrow as possible. This may be achieved by eliminating the side rails at the point that
the laser would strike it and let the chain only travel on the bottom center guide. It is
mandatory to keep each sensor’s field-of-view unobstructed and to prevent lasers from
hitting the chain.
The illustration below shows a B800 sensor mounted on the bottom of a frame with the
chain run through it’s field of view. This is an example of improper chain spacing. In this
case lasers 3 and 5 are not visible to Camera 1 and laser 4 is hitting the chain. No
range data will be reported for lasers 3 and 5 in this example because they are not seen
by both cameras.
Important! Both cameras must have a clear view of each laser in order to provide
range information.
The highly reflective surface and constant movement of the chain hit by laser 4 will
interfere with the sensor’s ability to give accurate range data at that point. It will also
cause the sensor to give range data while no board is present in the scanner.
Figure 5.4 - Improper Chain Spacing
One of the
Camera’s Field
of View

18
Board
Chain
guard
The illustration below shows an example of proper chain spacing. The chains are run
between sensors giving both cameras on each sensor a clear view of every laser
throughout the sensor’s measurement range. In addition, no lasers are hitting the chain
or other metal objects.
Figure 5.5 - Proper Chain Spacing

19
5.3 Cabling/Power
With all power OFF, plug the integrated power cable into each sensor. Ensure that the
cables are fully pushed into place and the hold down sleeve is screwed on hand tight.
Warning! Ensure the power is off when installing or removing a power cable from a scan head.
A single four pair plenum grade (i.e. industrial) shielded CAT5 cable is run to each head
from the NPH. The power cable connector used is a DIN 41 326 Standard 8 pin circular
connector. Pin outs are below as viewed from the solder side:
8
4
2
5
31
7 6
VDC+
VDC-
SerDat+
SerClk-
SerDat-
SerClk+
RxTx+
RxTx-
Figure 5.6 – Pin out of Connector from the soldering side
Name Description
VDC+/- DC power (VDC+) and Ground return (VDC-)
RxTx+/- Asynchronous 19.4 Kbaud serial bi-directional pair (RS-485)
SerClk+/- High speed Serial Clock pair
SerDat+/- High Speed Serial Data pair
Each of the four twisted pairs in the CAT5 cable are connected to one of the RS-485
differential or power/ground (+/-) pairs.
The B800 sensor has been specially designed to work with high source resistance
power supplies, thus allowing more inexpensive power cabling to be used (such as
CAT5 cable).
Note!
Use of CAT5 cable assumes a 24V supply, and a maximum cable length of 90 meterres.
The CAT5 cable DC resistance is about 25 ohms per thousand feet, or about 2.5 ohms
for the 100 foot round trip on a 50 foot cable. The B800 draws about 600 mA at 24 volts,
so a 1.5V drop occurs on the cable. Lower voltages (such as 15V) cause the switching
power supplies in the B800 sensor to draw more current, and will make the voltage drop
on the cable larger.

20
5.3.1 Connector and Cable Part Numbers
The manufacturer and part number for the cable end of the power cable is Amphenol
C091 31H008 101 2. The cable is 4 pair shielded CAT5 Ethernet cable, can be either
solid core or stranded, and has a variety of manufacture