原标题：Renesas智能家居/家庭能量管理系统(HEMS)解决方案

　　家庭能量管理系统(HEMS)将数字家电的互联实现家庭网络,防止罪犯入侵以及灾害预防的保安功能,远程操控,统一管理以及家庭自动化.在未来的智能家居HEMS系统将成为用户所选择的方向之一.想要组建HMES的话首先必须配置一个中控系统,它是整个HEMS解决方案的核心所在.有了这个系统才能够实现家中所有设备的管理,与家中的电视,空调,洗衣机,冰箱,电力系统,照明等设施相互连接.通过搭载的标准对以上的电器设施进行控制,以实现自动节能的目标.

　　通过实现智能家居来保护全球环境已经是刻不容缓的环保举措。产品的轻松使用、以高性能、多功能来满足今后生活方式的需求与环保理念已不再相互抵触。而使二者并存的正是“智能”家居，它采用的是一个能减轻对环境造成负荷的综合系统。

　　为了保护环境，瑞萨电子认真考虑实现智能家居需要哪些技术。瑞萨电子以低功耗和高效率技术为首的最尖端解决方案为支柱，运用在各个领域积累的丰富经验和独有技术，提供能满足客户实现智能家居的最佳平台。

　　想要组建HMES的话首先必须配置一个中控系统，这个中控系统是整个HEMS解决方案的核心所在，有了这个才能够实现家中所有设备的管理，可以与家中的电视、空调、洗衣机、冰箱、电力系统、照明等设施相互连接。通过搭载的标准对以上的电器设施进行控制，以实现自动节能的目标。

　　除了对家用电器的控制外HEMS还能够显示家庭的太阳光发电的蓄电池、家电设备的链接以及使用电量、充电、发电量以及热水储藏量等情况进行实时的监测。

　　当今的电子产品已经从功能单一的传统产品发展到多项功能的智能化产品，手机、家电等设施都已经逐步的实现智能化操作，设备与设备之间已经可以时间有效的互联，摆脱了过去“各自为政”的局面。

　　The benefits of energy-saving electronic monitoring and control systems for ‘smart houses’ are becoming better known, and sales of home energy management system (HEMS) products are expanding quickly in Japan and around the world. Simultaneously, operational protocols and standards are being set, enabling easy configuration optimization. Renesas is helping system engineers save time when developing better products for the smart home and HEMS markets.

　　Collecting energy usage data and controlling consumption intelligently Growth in the worldwide ‘smart house’ market is accelerating rapidly, driven in large part by rising environmental awareness and growing government support. This huge sales opportunity encourages system engineers to combine and apply information technology and embedded electronics in new ways to better manage energy usage within households.

　　A home energy management system (HEMS) reduces energy consumption and thus it is the core feature of a smart house. Electronics interconnects all of the energy consuming and producing devices.

　　图1。智能家居HEMS框图

　　A HEMS installation lets residents see and act on updated status information and makes them aware of consumption trends they wouldn’t otherwise notice. Armed with these data, they can implement socially responsible conservation measures that decrease their utility bills. And by submitting consumption information to service providers for analysis, they can learn how to obtain maximum benefits。

　　Supplying simple, reliable solutions to HEMS equipment designers.

　　Standardized communication components open up vast HEMS markets. Renesas provides advanced solutions that accelerate the development of products that interconnect seamlessly. Our advanced semiconductors, modules and support products let system engineers focus on features that add value and gain market advantages.

　　A typical system for controlling room lighting and temperature shows some of the components Renesas provides for energy management applications, including those that use three popular communication methods: ZigBee RF4CE wireless, Wi-SUN wireless, and PLC (power-line communication).

　　图2.管理整个家庭的家庭局域网(HAN)框图

　　Renesas’ networking solutions let HEMS installers select the best communication protocols for each remotely located system element. Our transmitter/receiver (modem) modules are thoroughly tested and approved, offering regulatory compliance that simplifies product development.

　　Renesas manufactures multiple types of microcomputers for HEMS central controllers. Our chips readily handle the requisite monitoring, evaluating and energy-consumption optimization tasks.

　　Our 16-bit RL78/L1C MCU, for example, is an excellent choice for central control units. Besides interfacing with communications modules, it can implement LCD panels, audio outputs, touch-key operation, sensor control, and USB communication and charging. Its support includes the RL78/L1C HMI solutions kit, a valuable system development tool.

　　As figure 6 shows, this solutions kit implements touch-key input and audio output for user-friendly control panels without external IC support. A general-purpose I/O port handles the touch-key input, and a digitally amplified PWM circuit implements the audio output. The MCU’s UART ports interface to all types of serial communication links.

　　图3.RL78/L1C人机接口(HMI)开发板框图

　　For HEMS installations that require central controllers with greater capabilities, we recommend the MPUs in the RZ/A1 series. These new chips achieve up to 1000 DMIPS throughput and have up to 10MB of on-chip RAM. They support full WXGA touch-screen displays for exceptional HMI (human-machine interface) performance and integrate many other on-chip peripheral functions.

　　The remotely located sensors, switches and actuators to which a HEMS central controller connects can use lower-performance MCUs. We generally recommend RL78 chips for such applications.

　　The R0K578L1CD000BR is an RL78/L1C HMI (human machine interface) evaluation kit that includes a segmented LCD display circuit, an audio playback circuit, and a capacitive touch circuit. With this kit, users can develop and evaluate USB products and HMI for home appliances, healthcare equipment, and other products with communication functions with ease.

　　图4.RL78/L1C人机接口(HMI)开发板外形图

　　RL78/L1C人机接口(HMI)开发板主要特性:

　　Built-in segmented LCD display, touch input, and audio playback functionality Makes it easy to develop and evaluate human machine interface for home appliances, healthcare equipment, and other products

　　Built-in touch detection makes it easy to improve the design of a product

　　Audio middleware for audio playback and speech rate conversion

　　Internal voltage boosting enables LCD display with low power consumption

　　Built-in sensor control system for M2M