Imec and Holst Centre announce that they have made a micromachined harvester for vibration energy with a record output power of 489 µW. Measurements and simulation show that the harvester is also suited for shock-induced energy harvesting in car tires, where it could power built-in sensors. In a tire, at 45 mph, the new device can deliver a constant 42 µW, which is enough to power a simple wireless sensor node. These results, obtained within the research centre’s program for Micropower Generation and Storage, are presented at the 2011 IEEE International Electron Devices Meeting (IEDM) in Washington (December 7-9).
Imec’s innovative harvester consists of a cantilever with a piezoelectric layer sandwiched between metallic electrodes, forming a capacitor. At the tip of the cantilever a mass is attached, which translates the macroscopic vibration into a vertical movement – putting strain on the piezoelectric layer and generating a voltage across the capacitor. As piezoelectric material, AlN (aluminum nitride) was chosen. The harvesters are packaged with a 6-inch wafer scale vacuum packaging process. The micromachining production process is compatible with low-cost mass-production fabrication. [via]
Car tires harvest energy - [Link]
Freescale Semiconductor introduced the MM912J637 intelligent battery sensor (IBS), which accurately measures the voltage, current and temperature of lead-acid batteries and calculates the battery state, all while operating in harsh automotive conditions. The ability to accurately assess these battery parameters is becoming more important with increases in the number of hybrid vehicles on the road and overall electronic content in vehicles, as well as the introduction of start-stop systems. [via]
Freescale introduces intelligent sensor for car battery monitoring - [Link]
The largest field test for vehicle-to-vehicle and vehicle-to-infrastructure communication (car-to-X communication) worldwide is about to get under way. Scientists, auto makers and communication companies as well as public-sector institutions have teamed up to develop a system that allows cars to share information on traffic conditions and impending hazards. The aim is to promote a safer, more efficient flow of traffic. Researchers from the Technische Universität München (TUM) are currently involved in devising the test scenarios that 120 vehicles will use to put the system dubbed simTD through its paces on Germany’s roads next spring.
Notice traffic blocks before they are visible. Recognize risky situations before they get out of hand. Reach your destination on time, safe and relaxed. The “Safe and Intelligent Mobility – Test Field Germany (simTD)” research project is pursuing these aims. The idea is to electronically network vehicles and infrastructure by means of car-to-X communication. A fleet of 120 vehicles fitted with the system developed by the simTD consortium is about to demonstrate how this works in practice on the highways, rural and urban roads in and to the north of Frankfurt am Main over several months. [via]
Intelligent cars alert each other to hazards - [Link]
BYU-student-built electric car sets land speed record at Salt Flats – [via]
An electric car designed and built by BYU engineering students set a world land speed record for its weight class, averaging 155.8 mph over its two required qualifying runs, one of which was clocked at 175 mph.
The milestone marks the end of a seven-year quest of more than 130 students, led by Perry Carter, who just retired as an associate professor.
“This is a wonderful closure to 31 years of teaching at BYU and many projects,” Carter said after the record was certified. “But this is the one that takes the cake. I’m done.”
BYU-student-built electric car sets land speed record at Salt Flats - [Link]
The “Schluckspecht E” electric vehicle built by a team at the University of Applied Sciences in Offenberg, Germany has broken the world record for the longest distance travelled on a single charge. The world record attempt was made at the Bosch test track in Boxberg with the vehicle travelling a total distance of 1631.5 km (1,013.76 miles), breaking the previous record of 1,003 km (623 miles) set by the Japan Electric Vehicle Club last year. [via]
Electric vehicle travels world record 1,000 miles+ on a single charge - [Link]
This project got started with the culmination of several things seeing several cellphone hacks over the years on Hack A Day, owning a car with a remote starter, having an office that is too far away from the parking lot to use the normal key fob and the ultimate motivator… winter weather! Of course some people think you’re crazy when you want a feature that just isn’t “out of the box”. Those are not the kind of people I would be expecting to read this. I figured I would document my little project and hopefully you enjoy it.
Remote Starter Extender Project - [Link]
Car battery and charging system monitor
This project is about making a simple electronic voltage monitor system for car’s battery and its charging system. It plugs into the car’s cigarette lighter receptacle and displays the instantaneous output voltage across the battery terminals on a 4-digit seven segment LED display. This helps you to get early warnings for possible battery and its charging system problems.
Voltage monitor for car’s battery and its charging system - [Link]
New multifunctional car key chip provides useful tools for car owners – [via]
NXP Semiconductors has developed a new chip for use in ‘smart’ multifunctional car keys. The chip enables the GPS coordinates of the parking location to be stored in the key and to be retrieved again using a smartphone compatible with Near Field Communications (NFC) technology. Next, the parking location can be displayed on your smartphone using a suitable application such as Google Maps.
Smart Key reveals car location on parking lot - [Link]
400W car power amplifier. Based on a push-pull converter with TL494 (KA7500) driver, 500W of power is enough for four TDA7294 integrated amplifiers. Three three-digit multimeters on front-panel shows actual battery voltage, temperature, and estimated output power.
4x100W car audio amplifier – [Link]