IoT applications utilizing excess heat in electrical lighting fixtures

The development of IoT instrumentation will always be strongly influenced by the properties of the power supply system. A large number of IoT nodes creates a danger of extra expenditures when changing the battery. For this reason, the development of supply nodes tends to prefer systems capable of battery-less operation, obtaining energy from other sources. This article deals with an alternative method of electrical energy acquisition form the excessive heat appearing in LED lighting fixtures utilizing large-area LED chips. A Peltier cell was used for the conversion of heat energy to electrical energy, connected as thermo-electric generator into the thermal chain

Energy consumption optimization for thermal energy harvester applications

This paper demonstrates the concept of node consumption reduction for IoT applications. The main emphasis is placed on the autonomy of the whole device, which must be independent of external power supply. That is why energy harvesting based on temperature principle is used for power supply. One of the parameters monitored is the service uptime. The concept of intelligent control of the individual parts of the equipment leads to significant energy savings. This control requires the use of low power components, but only their appropriate connection and mutual monitoring of their operating modes leads to the desired savings. This algorithm can be adapted to the needs of IoT nodes focused on real-time performance applications or the process tracking slow low power applications. This concept will ultimately be adapted to a wireless node for monitoring position and temperature for use in medical applications to monitor the patient's position on the bed or position while moving

IoT monitoring system for farmers

Článek se zabývá návrhem a testováním monitorovacího systému pro potřeby farmářů. Systém sestává z integrovaných autonomních BLE beacon, které jsou umístěny na sledovaných objektech (v našem modelovém případě se jedná o skot). Tyto beacony vysílají v určených periodách svoje identifikační údaje společně sdalšími doplňkovými informacemi, které následně slouží pro provedení přesného zaměření sledovaného objektu ve sledovaném prostoru (louka, pastva, ohradník)..the Technology Agency of the Czech Republic under the DELTA support programme for applied research, experimental development and innovation No. TF06000066and partially by the EU projects (Energy for Smart Objects (EnSO), No. 692482-2, Wide band gap Innovative SiC for Advanced Power (WInSiC4AP), No. 737483), project of Technology Agency of the Czech Republic No. TH03010205 MEMS sensors with optical scanning (MEMS-ESO) and by Smart Access Control for Smart Buildings (SACON), No. 12708.This paper discusses the concept, design and testing monitoring system for the needs of farmers.The system consists of integrated autonomous BLE beacons, which are located on monitored objects (in our model case, cattle). These beacons transmit their identification data in specified periods together with other additional information, which is then used to perform the precise targeting of the monitored object in the monitored area (meadow, grazing, fence)

IoT applications utilizing excess heat in electrical lighting fixtures

Vývoj IoT zařízení bude vždy silně ovlivněn možnostmi napájení systému. Značný počet uzlů IoT (node) vytváří nebezpečí dodatečných nákladů při výměně baterii. Z tohoto důvodu se vývoj napájení uzlů zaměřuje na zařízení, která mohou pracovat bez baterie a energii získávají z jiných zdrojů. Tento článek se zaměřuje na alternativní získání elektrické energie z odpadního tepla vznikajícího při provozu LED svítidel obsahující velkoplošné LED čipy. Pro konverzi odpadní tepelné energie na elektrickou energii je využit Peltiérův článek zapojený ve funkci termogenerátoru do teplotního řetězce.The development of IoT instrumentation will always be strongly influenced by the properties of the power supply system. A large number of IoT nodes creates a danger of extra expenditures when changing the battery. For this reason, the development of supply nodes tends to prefer systems capable of battery-less operation, obtaining energy from other sources. This article deals with an alternative method of electrical energy acquisition form the excessive heat appearing in LED lighting fixtures utilizing large-area LED chips. A Peltier cell was used for the conversion of heat energy to electrical energy, connected as thermo-electric generator into the thermal chain

Intense Redox-Driven Chiroptical Switching with a 580 mV Hysteresis Actuated Through Reversible Dimerization of an Azoniahelicene

Electrochemical reduction of an azoniahelicene affords a dimer, accompanied by a strong change in the electronic circular dichroism. The fast dimerisation event leads to a >500 mV shift of the oxidation potential, affording a large area of bistability, where the chiroptical signal only depends on the redox history

Helquats: a facile, modular, scalable route to novel helical dications

The synthesis and properties of helical extended diquat (helquat), and derivatives that bear resemblance to diquat and azoniahelicene, was reported. Triyne with elongated tethers connecting the heterocyclic moiety with the pendant alkyne functionalities undergoing cycloisomerization give helquat featuring two seven-membered rings. The seven helquats reported are accessed uniformly in three steps from commercially available starting materials, entailing a Sonogashira coupling, bisquaternization, cycloisomerization, and 2+2+2 cycloisomerization. The evidence for the reversible electrochemical Weiz-type manifold and regular columnar stacks in crystal structures suggest the potential of helquats as electroactive functional elements