Special Coverage

Active Aircraft Pylon Noise Control System
Unmanned Aerial Systems Traffic Management
Method of Bonding Dissimilar Materials
Sonar Inspection Robot System
Applying the Dynamic Inertia Measurement Method to Full-Scale Aerospace Vehicles
Method and Apparatus for Measuring Surface Air Pressure
Fully Premixed, Low-Emission, High-Pressure, Multi-Fuel Burner
Self-Healing Wire Insulation
Home

Laser Repair System

New Wave Research, Inc. (Fremont, CA) has introduced the QuikLaze 200 laser repair system equipped with the BDS1000 industrial microscope. The QuikLaze 200 and BDS1000 combine to create a rugged optomechanical platform that readily withstands 3g. The repair system includes beam-shaping optics, high-efficiency beam delivery, and a camera port. Other features include a high-speed, high-resolution rotational X-Y shutter for accurate cutting control, a quick exchange of DI cartridge with easy-access door, and an option for 3-4X high laser energy density.

Posted in: Products, Products

Read More >>

High Resolution Camera

The new 2.0MP Flea®2 camera from Point Grey Research® Inc. (Scottsdale, AZ) delivers full resolution 1624 x 1224 images at 14 frames per second. It incorporates the Sony® ICX274 1/1.8" progressive scan CCD image sensor with square pixel array. The ultra-compact camera has jackscrew connectors for secure locking, pixel binning, and in-field firmware upgrades. Additional features include on-camera color processing and white balance, automatic synchronization of multiple cameras, external trigger and strobe output, and low power consumption. The 2.0MP Flea2, model FL2-20S4, is available in monochrome and color.

Posted in: Products, Products

Read More >>

Gigabit Ethernet Camera

JAI (San Jose, CA) offers the TM-2040GE, a high resolution, high performance Gigabit Ethernet camera. The TM-2040GE offers two-megapixel UXGA resolution of 1600 × 1200 pixels at 34 frames per second. The camera features JAI’s high fidelity front-end circuitry and low noise power supply with a typical signal-to-noise ratio of greater than 58 dB. Monochrome and Bayer CFA color models are equipped with standard GigE Vision Gigabit Ethernet digital interfaces. Uses for the TM-2040GE cameras span a wide range of machine vision, medical, and intelligent transportation system applications, where high speed and high resolution are required.

Posted in: Products, Products

Read More >>

Wireless Measurement of Contact and Motion Between Contact Surfaces

A magnetic-field-response contact sensor is used. This method uses a magnetic-fieldresponse contact sensor that is designed to identify surface contact and motion between contact locations. The sensor has three components: (1) a capacitorinductor circuit with two sets of electrical contact pads, (2) a capacitor with a set of electrical contact pads, and (3) an inductor with a set of electrical contact pads. A unique feature of this sensor is that it is inherently multifunctional. Information can be derived from analyzing such sensor response attributes as amplitude, frequency, and bandwidth. A change in one attribute can be due to a change in a physical property of a system. A change in another attribute can be due to another physical property, which has no relationship to the first one.

Posted in: Briefs, Electronics & Computers

Read More >>

Wireless Measurement of Rotation and Displacement Rate

A magnetic field response sensor is used in these measurements. A magnetic field response sensor is designed to measure displacement or rotation rate without a physical connection to a power source, microprocessor, data acquisition equipment, or electrical circuitry. The sensor works with the magnetic field response recorder, which was described in “Magnetic- Field- Response Measurement- Acquisition System,” NASA Tech Briefs, Vol. 30, No. 6 (June 2006), page 28. These sensors are wirelessly powered and interrogated, and the measurement acquisition system and sensors are extremely lightweight.

Posted in: Briefs, Electronics & Computers

Read More >>

Tachometers Derived From a Brushless DC Motor

Neither excitation of the motor nor mechanical brushes is necessary. The upper part of the figure illustrates the major functional blocks of a direction-sensitive analog tachometer circuit based on the use of an unexcited two-phase brushless dc motor as a rotation transducer. The primary advantages of this circuit over many older tachometer circuits include the following:

Posted in: Briefs, Electronics & Computers

Read More >>

VCO PLL Frequency Synthesizers for Spacecraft Transponders

Two documents discuss a breadboard version of advanced transponders that, when fully developed, would be installed on future spacecraft to fly in deep space. These transponders will be required to be capable of operation on any deepspace- communications uplink frequency channel between 7,145 and 7,235 MHz, and any downlink frequency channel between 8,400 and 8,500 MHz. The document focuses on the design and operation of frequency synthesizers for the receiver and transmitter. Heretofore, frequency synthesizers in deep-space transponders have been based on dielectric resonator oscillators (DROs), which do not have the wide tuning bandwidth necessary to tune over all channels in the uplink or downlink frequency bands. To satisfy the requirement for tuning bandwidth, the present frequency synthesizers are based on voltage-controlled- oscillator (VCO) phase-locked loops (PLLs) implemented by use of monolithic microwave integrated circuits (MMICs) implemented using inGaP heterojunction bipolar transistor (HBT) technology. MMIC VCO PLL frequency synthesizers similar to the present ones have been used in commercial and military applications but, until now, have exhibited too much phase noise for use in deep-space transponders. The present frequency synthesizers contain advanced MMIC VCOs, which use HBT technology and have lower levels of flicker (1/f) phase noise. When these MMIC VCOs are used with high-speed MMIC frequency dividers, it becomes possible to obtain the required combination of frequency agility and low phase noise. This work was done by Scott Smith, Narayan Mysoor, James Lux, and Brian Cook of Caltech for NASA’s Jet Propulsion Laboratory. For further information, contact iaoffice@jpl.nasa.gov.

Posted in: Briefs, Electronics & Computers

Read More >>

The U.S. Government does not endorse any commercial product, process, or activity identified on this web site.