 |
|||||||
 |
 |
 |
 |
 |
 |
 |
 |
|
|||||||
|
|
|
|
|
|
|
|
The BMS-1000 System is composed of up to 32 pairs of ultrasonic transmitter/receivers. Each channel of ultrasonic transducers connects to the BMS controller which, in turn, connects to an optional ink-spray marking system. The controller can also communicate with Ultrasonic Arrays’ MeasureMate Process Monitoring Software. This system provides on-screen monitoring of the internal bond integrity for each panel as well as real-time views of press performance, by opening. The system software includes a variety of printed reports and has options for encoders, weigh scales, thickness monitors, and alarm outputs.
The standard BMS system has multiple outputs for an ink marking system or sorting. Multi-zone output is available for spraying the exact location of the defect. Any of these output configurations can attach to your panel sorter PLC, your own ink-marking system, or an optional factory-installed, frame-mounted inking system.
The BMS-1000 is designed to be a reliable system and has the following safeguards built in:
1. Channel blocked alarm - If a channel becomes blocked due to debris, a flag will appear on the BMS display and MeasureMate PC. A relay will also change state (alarm). These conditions will clear when the fault has been removed.
2. Maximum % defect alarm - If panel defects exceed a programmed percentage, a relay will change state (alarm).
3. Slim line sensors - Causes debris to fall to the floor rather than being trapped, covering sensors, causing a blocked channel.
4. System error alarm - A “system error” relay output is triggered on whenever panels are being transferred through the BMS and the system is not working.
5. Good panel output - Fail safe feature ensuring that only good panels are shipped.
CONTROL
An operator interface consisting of a 24-button keypad and a very bright, one-quarter SVGA display allows easy access to all system status and setup parameters. The system features a fully menu-driven interface with three levels of password protection and extensive context-sensitive help.
Control over defect rejection is specified by entering the defect (blow) length through the operator interface (keypad and display) with resolution to 0.1 inches.
CALIBRATION
Calibration is automatic. The electronics self-calibrate the system at every gap between panels. The system learns what panels of a particular thickness and composition acoustically “look like” the first time a product is run. After that, the controller automatically adjusts internal variables, to calibrate the system to each product manufactured. Variables are saved in one of the 99 product locations and are used the next time the product is manufactured.
DEFECT SIZE DETERMINATION
The size of defect that is to be considered unacceptable is adjustable for each of the 99 products. A highly accurate defect length is calculated internally by the BMS-1000 using either a timing method for constant speed lines or by using a tachometer input for variable speed lines. The minimum size of defect that can be detected in the cross-machine direction is dependent upon the coverage (number of channels). A tech note is available from UAI that explains the relationship between the number of sensors and defect size.
REPEATIBILITY
The accuracy and repeatability of the BMS-1000 is due to the removal of ambiguity in the ultrasonic signal that is transmitted through the wood panel. Factors that can result in ambiguity are acoustic and electromagnetic noise, environmental, panel temperature, product thickness and density. All of these factors can have a negative effect on the accuracy of the system and the ability to reliably detect a defect or poor bond quality. UAI bond data is normalized (the affects of all of these variables are removed from the raw data so that only the influence of bond remains). Defect severity and size are set at installation for each product and need no further adjustment since the system is continually self calibrating.
SPECIFICATIONS
Maximum Panel Thickness: 1.75" (Hot); 5.5" (Cold)
Minimum Panel Thickness: 0.18"
Maximum Number of Channels: 32
INSPECTION RATE
250 samples per second per channel (4,000 maximum)
FREQUENCY
The BMS controller automatically synthesizes and drives each sensor pair at its resonant frequency to maximize the signal to noise ratio of each sensor. Driving the sensors at resonance reduces the noise floor, permitting increased sensitivity for defect detection/bond measurement without degrading system performance due to external noise. Conventional blow detectors do not have this feature.
ELECTRICAL
100/110/220 volts CA, 50/60 Hz
INTERFACE
Settings and adjustments are made with a full function 24-button keypad, 3.5” x 5” SVGA display (320x240 resolution)
Tachometer/Encoder input: Optional
Multi-opening Press Software: Optional via RS-422
ENVIRONMENTAL
Ambient: 20° to 60° C
SENSORS
Airhood: 3.50” diameter x 12”
Transducers: 1.5” diameter (active area)
Minimum Spacing: 3.5”
OUTPUTS
RS-422
Relay Outputs
Standard: 2 per system
Optional: 1 per channel
Ink spray marking system is optional
Printed panel and alarm reports with Ultrasonic Arrays’ MeasureMate Bond Monitoring Software.