- May 30, 2010
May 30, 2010 - MicroStrain released EH-Link, a hybrid energy harvesting wireless sensor node that collects energy from multiple sources including strain, vibration, thermal gradients, ambient light, and thermal and electromagnetic fields. In addition to multiple harvesting inputs, the EH-Link features an on-board triaxial accelerometer, relative humidity sensor, temperature sensor, and signal conditioning for a Wheatstone bridge which is compatible with strain gauges, load cells, torque sensors, pressure transducers, and magnetic sensors, all in a miniature package. EH-Link has two energy harvesting inputs and is compatible with piezoelectric, electro-dynamic, solar, RF field, and thermoelectric harvesters. The primary input can operate from AC or DC sources from 3 V to 20 V. The ultralow voltage (ULV) input can be powered from Peltier thermoelectric generators (TEGs), or thermopiles. The ULV input can operate from as low as 0.02 Vdc and up to 0.6 Vdc making the node operable from temperature differentials below 5 ˚C with TEGs. It can also operate in ambient light levels well below that required for solar cell use with traditional electronics. Sophisticated energy conversion and conservation methods allow the EH-Link to operate from a fraction of the power normally required for a wireless sensor node. The module is versatile and is designed to operate as part of MicroStrains 802.15.4 wireless sensor network. Each node in the wireless network is assigned a unique 16-bit address or an optional 96-bit EPC code for self-powered active sensor RFID applications. MicroStrains energy harvesting technology is protected by US Patents both issued and pending. To promote experimentation with the product and discovery of new applications, MicroStrain is offering an advanced Pioneer Kit for early adopters which includes an EH-Link, Software Developer Kit, tester board, two harvesters, and a wireless base station. The kit will allow engineers to test out a variety of sensing applications and harvesters to optimize their particular requirements.