Sensors/Data Acquisition

Free Space Optical Receiver for Data Detection and Radio Science Measurements

This technique is intended to save power, bandwidth, and scheduling demands on the spacecraft. NASA’s Jet Propulsion Laboratory, Pasadena, California For deep space communication systems, the decision of whether or not to suppress the transmitted carrier has always been an issue. For certain missions that use high data rates, the available bandwidth might be a limiting factor. In such cases, it is preferred to use a completely suppressed carrier system that is more bandwidth efficient.

Posted in: Briefs, TSP, Data Acquisition, Sensors

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Physical Characterization of Radiated and Non-Radiated Materials to Temperatures Less than 50 K

Coefficient of thermal expansion and Young’s modulus of the materials are determined via custom analytical equipment that can allow temperatures down to 20 K. NASA’s Jet Propulsion Laboratory, Pasadena, California Solar-array panels will experience very low temperatures of 50 K for the proposed Europa Clipper Mission (ECM). Solar-array panels will also undergo thermal cycling from 50 K to 133 K during the mission due to Jovian eclipsing. Unfortunately, there was no knowledge of the physical properties of the materials planned to be used down to ≈50 K, making it difficult to assess their reliability under such extreme cryogenic temperature conditions.

Posted in: Briefs, TSP, Data Acquisition, Sensors

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Sensor Beacons

EM Microelectronic (Marin, Switzerland) offers the EMBC02 sensor beacon, which integrates a 3- axis accelerometer. By attaching the device to objects or people, both proximity and motion can be monitored with a smartphone or tablet application. The EMBC02 can be programmed to transmit proximity, identification data, motion data (movements, vibrations, acceleration), as well as specific motion-based alarms based on accelerometer data originating from shock, free-fall, or taps. To maximize battery life, data is beaconed only when required, e.g. while in motion, or when an alarm condition occurs. The FCC/CE/IC-certified device is weatherproof and includes a multi-function input button and two LEDs for user feedback. For Free Info Visit http://info.hotims.com/55589-155

Posted in: Products, Sensors

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Temperature Sensors

Maxim Integrated (San Jose, CA) has introduced the MAXREFDES42# IOLink resistance temperature detector (RTD). The design’s integrated analog front end (AFE) also identifies overvoltage, shorts, and open circuits. The temperature appears immediately on an LED display.

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Sensor System

Olea Sensor Networks (Sunnyvale, CA) has announced its OleaVision™ sensor system, which differentiates between live animate beings and inanimate objects up to a five-meter distance. To distinguish between human and animal presence and movement, the technology “sees” through walls, regardless of whether the monitored subject is moving or motionless. The sensor can be used in a variety of markets, including automotive/transportation, industrial, smart home and security systems (for pedestrian and bystander detection), collision avoidance, fire safety, and energy management.

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Load Cells

Interface (Scottsdale, AZ) has released the Model 6AXX series of 6-Axis Load Cells. With six full bridges providing mV/V output on six independent channels, the load cells measure forces simultaneously in three mutually perpendicular axes, and three simultaneous torques about those same axes.

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Accelerometers

The SDI Model 1510 Series from Silicon Designs (Kirkland, WA) offers vibration measurements. The analog surface mount (LCC) MEMS variable capacitive accelerometers incorporate a micromachined variable capacitive sensing element and custom integrated circuit.

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