Test & Measurement

Digital Measurement

Siemens (Munich, Germany) offers Flender Gearlog digital measurement technology for gears that captures values relating to rotational speed, torque, temperature, and vibration using special sensors that record important physical variables. The aim is to compare operational load spectra with the fatigue strength of individual gear unit components over time to match up the gear unit and the working machine for the long term. The system adds up these readings in parallel with machine capacity utilization. The measurement results are logged, saved, and digitally depicted in compressed form. Operators are able to visualize the results at any time or read them out in the form of a dataset. The measurements enable conclusions to be drawn about the applied load and loading capacity of gears, and can be used to identify possible sources of damage, capacity reserves, and overloading in the measured gear.

For Free Info Visit http://info.hotims.com/61064-401

Posted in: Products, Manufacturing & Prototyping, Test & Measurement
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Handheld Meter

The OMEGA® HHTP21 handheld particulate, humidity, and temperature meter from OMEGA Engineering (Stamford, CT) measures fine and coarse particle pollution from many different sources. Features include fine particulate matter (PM2.5) measurement, health index (0 to 9) detection and alarm, PM2.5 time weighted average reading, data hold and max/min with time stamp function, six-color LED indication air quality at good/moderate/poor, and preset warning point of buzzer alarm, LED, and alarm output. The meter monitors particulate pollution in burning plants, petrochemical facilities, thermal power plants, restaurants, hospitals, mining facilities, metal refineries, and commercial and public buildings.

For Free Info Visit http://info.hotims.com/61064-403

Posted in: Products, Manufacturing & Prototyping, Test & Measurement
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Bit Error Rate Tester

Keysight Technologies (Santa Rosa, CA) introduced the M8040A bit error rate tester (BERT) for testing PAM-4 and NRZ devices that operate up to 64 GBaud. Engineers in validation labs and R&D who characterize receivers on the physical layer for the next generation of data center interconnects can use the device for test setups and repeatable results. The pattern generator module provides built-in deemphasis, jitter injection, and an optional second channel. Users can select PAM-4 and NRZ in the user interface, eliminating the need for external combiners, cabling, and de-skew to provide PAM-4 signals. For best signal quality, remote heads reduce the distance to the device under test.

For Free Info Visit http://info.hotims.com/61064-402

Posted in: Products, Manufacturing & Prototyping, Test & Measurement
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Friction Tester

Paul N. Gardner Co. (Pompano Beach, FL) offers a compact CFT friction tester that provides detailed information of the slip characteristics of packaging material. Surface slip is a key factor when printing, erecting, or filling packaging materials on an automatic line. The CFT measures both static and dynamic coefficients of friction. A sample of 2.5 × 2.5" with a weight acting over the entire surface area is moved over another sample at a given speed. Static and dynamic coefficients of friction (COF) are automatically calculated and displayed on-screen. Features include graphical representation of forces during test, and pre-loaded ISO/ASTM/TAPPI test methods.

For Free Info Visit http://info.hotims.com/61064-404

Posted in: Products, Manufacturing & Prototyping, Test & Measurement
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Signal Analyzer

The MS2840A signal analyzer from Anritsu (Richardson, TX) features frequency coverage of 9 kHz to 44.5 GHz and close-in SSB phase noise performance. Frequency coverage can be extended to the millimeter wave (mmWave) range. The analyzer can conduct wideband and narrowband measurements on next-generation 4G/5G designs, micro wave and mmWave wireless backhaul, 79 GHz band automobile radar, satellite communications, and VHF/UHF Private Mobile Radio (PMR). The unit’s oscillator achieves phase noise performance of –123 dBc/Hz at 1 GHz measurement frequency, and 10 kHz offset frequency.

For Free Info Visit http://info.hotims.com/61064-405

Posted in: Products, Manufacturing & Prototyping, Test & Measurement
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Using PXI to Build a High-Performance MEMS Microphone Testing System

The demand for increasing microphone signal quality from handheld mobile devices has led to the development of microphone signal processing technologies such as: HD audio, noise cancellation, active noise cancellation, beam forming, directional reception, stereo sound field reconstruction, and speech recognition. As well, devices incorporating multiple microphones are becoming more and more popular. Several newly released smart phones now integrate multiple MEMS (Micro Electrical-Mechanical System) microphones for improved background noise cancellation. All flagship smart phone models in introduced in 2015 featured three or more MEMS microphones to support HD audio, ambient noise cancellation, noise filtering, directional reception and speech recognition. Popularity of MEMS microphones is expected to grow.

Posted in: White Papers, Electronics, Data Acquisition, Sensors, Test & Measurement
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Hermetic Seal Leak Detection Apparatus with Variable Size Test Chamber

A streamlined, cost-effective, sensitive approach to detecting leaks in hermetic seals.

Marshall Space Flight Center, Alabama

NASA’s Marshall Space Flight Center has developed a unique apparatus ideal for use in nondestructive testing (NDT) of hermetic seals of containers or instrumentation. The device is capable of detecting both large and small leaks and can be calibrated to characterize the relative leak rate. Its simple design does not require specialized gases for pressurization and detection, and eliminates the need for expensive instrumentation such as a mass spectrometer to analyze leaks and achieve high sensitivity. Low in cost and simple to manufacture, the patent-pending technology is ideal for use in many industries, from aerospace applications to food packaging and commercial goods.

Posted in: Briefs, Test & Measurement, Containers, Seals and gaskets, Non-destructive tests, Test equipment and instrumentation
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Extreme Low Frequency Acoustic Measurement System

This system detects and locates atmospheric clear air turbulence and severe weather.

Langley Research Center, Hampton, Virginia

NASA’s Langley Research Center has developed a system to detect and locate atmospheric clear air turbulence (CAT) by means of a ground-based infrasonic array to serve as an early warning system for aircraft. This system could augment existing systems such as pilot reports (PIREPs), airborne lidar, and airborne radar. The NASA system offers a benefit since the existing electromagnetic methods lack targets at 30,000-40,000 feet and will not detect CAT. Because CAT and severe storms emit infrasound that propagates over vast distances through the Earth’s atmosphere, the Langley system offers an excellent early warning opportunity. The system has been able to detect known events — such as detection of the launch of the Space Shuttle in Florida all the way from Virginia. It also has correlated data with NOAA’s PIREPs information.

Posted in: Briefs, Test & Measurement, Measurements, Weather and climate, Acoustics, Turbulence
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Low-Temperature Radiometer

This technology can look for heat leaks and reflected flux in low-temperature thermal vacuum systems.

Goddard Space Flight Center, Greenbelt, Maryland

Many present and future NASA missions require high-performance, large-scale cryogenic systems, such as the sunshields and cold instruments for the James Webb Space Telescope (JWST). Testing these systems is problematic because of both the size and the low heat loads allowed. The heat loads can be greatly influenced by non-ideal blackbody characteristics of the test chamber, and by stray heat from warmer parts of the system and ground support equipment. Previously, stray thermal energy was not directly measured, but inferred from deviations in the expected results, which leads to errors in thermal modeling and in lack of knowledge of the thermal performance of the item under test. Technologists at NASA Goddard Space Flight Center have developed a radiometer to help identify the sources of stray heat and to make non-contact thermal emission measurements of such materials as vapor-deposited aluminum on Kapton and multilayer insulation blankets, as well as background measurements of non-ideal chamber effects such as light leaks and radiation bounces.

Posted in: Briefs, Test & Measurement, Optics, Radiation, Thermal testing, Satellites
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Lightweight Internal Device to Measure Tension in Hollow-Braided Cordage

This device has applications in industries commonly using cordage, such as shipping, sailing, and lifting.

NASA’s Jet Propulsion Laboratory, Pasadena, California

The suspension system of parachutes is typically made from ropes (referred to as cordage). Measuring loads in the suspension system cordage has thus far proven very challenging because of the dynamic nature of the parachute. The suspension lines must be deployed along with the parachute, and experience rapid acceleration and dynamic motion as the parachute inflates. The addition of bulky load cells to the suspension lines would change the dynamics of the system and corrupt the data.

Posted in: Briefs, Test & Measurement, Suspension systems, Measurements, Fibers, Tensile Strength
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