| Controller for a Scanning Tunneling Microscopy
The STM technology allows visualization of conductive or semi-conductive
samples at better than atomic-scale resolution. The technique is based
on the detection of a very small tunnel current (~ 1 nA) between an
exceedingly sharp metallic tip and the sample. A control loop is used
to keep the current constant by keeping the tip at about 1 nm from
the sample. The surface is scanned along X and Y axes while recording
the height of the tip, thus yielding the topology of the sample.
SIGNAL RANGER tasks:
- Automatic approach to creating the tunnel junction
- Digital control loop to stabilize the tunnel current and tip
position
- Linearization of the current/position relationship
- Real-time compensation of the capacitive coupling (typical
noise)
- Image acquisition, real-time data compression and transmission
to PC
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Digital controllers for Hydraulic test applications
Tiab produce flexible digital controllers for Hydraulic test applications and provide bespoke solutions using
the Signal-Ranger DSP board series. The efficiency and flexibility of the Signal-Ranger board means they can be
readily adapted to handle a wide variety of very specific applications.
SIGNAL RANGER tasks:
- Real time data acquisition, signal monitoring and replay of data
- Real-time oscilloscope and data logging
- Real-time signal generators with sweep control (sine, triangle, square)
- Real-time PID control for up to twelve axes, and up to 25KHz loop closure
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Material Test System
Test Resources, Inc., has developed a new generation Imacon 2350
servo-control system, powered by the DSP Signal Ranger board, for
mechanical testing. It can handle a variety of test systems, including
servo-hydraulic and servo-electric materials test systems, bi-axial
and multi-axial structural test rigs as well as vibration test systems.
SIGNAL RANGER tasks:
- Unified high-performance and drive independent control system
- Accepts feedbacks from LVDT’s, strain bridges, accelerometers
and encoders
- Up to 20 kHz servo-loop update frequency and the capability
to handle up to 8 independent servo-control channels
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Multi-Channel Speech Acquisition and Processing System
To upgrade the Clarinet Merlin Receiving System (CMRS) used by the U.S. Navy, Space and Naval Warfare
Systems Command, Long Wave Inc. developed a decoder that uses the Signal Ranger DSP board provided by Soft dB.
This system is an unmanned, remote operated, shore based receiving system designed to receive coded emergency signals from the Submarine
emergency Communications Transmitter buoys. The CMRS decodes a valid message and processes the decoded message into properly formatted CMRS messages.
LongWave Inc. is ahead of its competitors because the DSP Signal Ranger board enhances the performance by as much as 10 dB.
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PID Controller (Proportional-Integral-Derivative Controller)
The PID Controller ( Proportional-Integral-Derivative Controller) can be easily implemented on the Signal Ranger Mk2 DSP board and the SR2_Analog16 I/O expansion board.
PID controller is often used in industrial control systems. It compares a measured value from a process with a reference set point value. The difference (or "error" signal) is then processed to calculate a new value for a manipulated process output that brings the process measured value back to its desired setpoint.
An example of a PID controller for the SR- Mk2 DSP board is available for free (LabView VIs and DSP code are also provided). The example includes a friendly PC interface that allows the real time adjustment of the P, I and D parameters.
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Educational Laboratory
The international TEAM Project (Tele-Education in Aerospace and Mechatronics) is a research
and educational virtual laboratory via Internet. It is composed of work stations located in universities from different countries.
TEAM uses the Signal Ranger DSP board as a teaching tool in the field of control.
Consult also:
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Sound Masking System
The Smart SMS sound masking system developed by Soft dB uses the DSP board. This system
allows to reduce audible distractions and increase speech privacy in office environments.
The Smart SMS, a state-of-the-art product, provides a unique auto-adjustment process (patent
pending 2,471,674) that ensures to generate the desired noise masking spectrum.
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| Biomedical Technologies
Santos Signal Processing (SSP) is a high-technology biomedical 8-channel
data acquisition and processing program, developed around the Signal
Ranger DSP board and using LabView 6.1. It was developed at
the Cyclotron RI Center, Division of Cyclotron Nuclear Medicine
at the Tohoku University in Japan.
SIGNAL RANGER tasks:
- Real-time measurement of 8 vital signs and parameters
- Real-time parallel processing of each of the individual signals
- Real-time visualization of each of the individual signals
For more information, contact Mr. Sasaki at Iwate Cube R&D Co.
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Motion Systems
D-Box Technology uses the Signal Ranger board to sample motion profiles
in a real environment for ODYSSEE motion systems. The ODYSSEE motion
systems is an innovative patented technology that creates a virtual
reality moving experience for the home theater by lifting the seating
and occupants up on a four-point suspension.
SIGNAL RANGER tasks:
- Real-time DSP integration of the 4 acceleration signals
- Extraction of the position profiles in 3 degrees of freedom
to drive the platform
- KineLink stream synthesis, to drive 2 separate Odyssee platforms
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