The electronic power meter sensor module was developed as a part of a global intelligent management system for domestic power consumption management (TELEC) 1 for energy optimisation, both in terms of client costs and energy saving. Abs ract tThere is an increasing concern for the intelligent management of domestic power consumption based on intelligent sensors and actuators (attached to domestic appliances). This paper describes the electronic power meter sensor module of an intelligent management system being developed which is based on a network of functionally independent intelligent sensor and actuator modules. The actuator architecture has different modules to interface and read values from sensors and to communicate with other actuators.The management process is based in data acquired by intelligent sensors and actuators and controls home appliances based on environmental conditions and energy profiles, as well as several factors related to the comfort, commodity and security of users.The main project strategy was the development of a generic system composed of independent functional units (sensor and actuator modules) that can operate in a distributed control mode or under central controller supervision. This configuration gives the user a larger set of control options, as the control of a single appliance, a single space or division or the whole house.The electronic power meter sensor module is responsible for measuring energy and instantaneous and average power. Its functionalities allow it to be used for simple domestic electric power measurement applications. Moreover, it can store power consumption profiles and automatically identify and detect malfunctions of home appliance connected to the network at a given moment. The communication with external devices is implemented using standard serial interfaces.The block diagram of an actuator is illustrated in Fig. 1.

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A two-stage Fully differential Differential Difference AmpliJier (FDDA) cell is presented. The input linear transconductance ports and the two stage topology are referred and the open-loop characteristics discussed. Based on this fully differential analogue cell, a new fully differential variable gain instrumentation ampliJier is proposed. This new topology is based on the previous described FDDA cell, with a voltage-controlled differential transconductance cell used on the feedback loop of the ampllJer to control the ampli3er's gain. The gains can be continuously tuned within one decade variation range by a controlling voltage V, This decade range is set by two equal feedback resistors Rg Simulation results are discussed and applications of these analogue building blocks in a modular architecture for smart sensor development are referred

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A modular architecture for designing and fast prototyping of smart sensor microsystems, combining both monolithic and hybrid technologies, is presented. nte architecture comprises several modules for analogue sensor signals conditioning and processing, as well as their digital conversion and firther digital processing. A microprocessor-based module is also included for added control and digital processing capability. nte modules are, in general, both hardware and sofiiare programmable and their finctional models are included in a computer assisted design environment, which complements the system and provides great flexibility for the systematic development and prototyping of smart sensor microsystems with local information processing capability.