• 목록
• 답변
• 글쓰기
• 게시판 리스트 옵션
  • 수정
  • 삭제

The power utilization will be accessed for example by displaying net pages using any machine that's connected to the local server or the internet. Cite:Bochuan Wang, Xixiu Wu, Zhuqing Xia, Xin Yang, and Zhining Yang, "Research on the Characteristics of the Low Voltage Power Line Carrier Communication Channel," Journal of Advances in Computer Networks vol. The sensible meter system 50 is a many-to-one information communication topology. The strategy consists of coupling a minimum of one resistor to a excessive voltage portion of the good meter. This bias condition allows the IR LED diode to operate at a voltage bias situation to maximise the sensitivity of the optically coupled isolator and minimize the present consumption. The IF LED 9 is biased within the ahead conduction region using a voltage supply VB 8. This bias situation is determined by choosing a present-limiting resistor RD 10 that's equal to the distinction of bias voltage source VB eight and the forward voltage VF of the IR LED diode divided by the forward present IF of the IR LED diode. FIG. 3 is an illustration of circuit design for a present sensing portion of voltage and present sensors 39 within the smart meter 3 of FIG. 2 for a single-phase power line system.

Using optically coupled isolators, the sensed voltages in the high voltage energy traces are optically coupled and electrically remoted to the low voltage circuits. These voltages are optically coupled and electrically isolated to the inputs of the low voltage circuits by utilizing optically coupled isolators. An optical transistor 57 has a base terminal B that is optically coupled to the IF LED which is a low voltage portion 102. The collector terminal C is linked to the VDD terminal 56. The emitter terminal E is connected to the first terminal of a resistor RL 58 within the emitter follower configuration. FIG. Three is an illustration of circuit design for current sensing transistor in an emitter follower configuration with load resistor linked to the emitter. FIG. 7 is an illustration of circuit for voltage and present sensing for the emitter follower configuration for a 3-phase power line utility. The common energy dissipated in resistive loads, e.g. household appliances, could be calculated because the product of root-mean-squares of present and voltage averaged over a time period. There may be a need to enhance system efficiency, reliability, testability and manufacturability of the good meter in the course of the product manufacturing and prototyping. But for non-resistive loads, comparable to AC motors, the common AC energy can be calculated by the direct product of present and voltage averaged over a time period.

The first terminal of a small shunt resistor RS 7 is related in sequence with the new line of energy line pair 6 which is a excessive voltage portion 100; the opposite power line 5 is the neutral or floor line. A smart meter system voltage and present sensing are carried out as voltage drops across a shunt resistor in collection with the power line or from a voltage divider connected throughout the facility traces. A transformer-less technique and system for voltage and present sensing using voltage drops across resistors is disclosed. The current invention is expounded typically to meters for measuring energy and more notably to a smart meter system. The sensible meter three includes a energy supply 35, a battery backup 36, a liquid crystal show or LCD display 37, a RF controller System-on-Chip (SOC) 38, and voltage and present sensors 39. The battery backup 36 offers a non-interruptible energy provide within the event of a power failure. In a second aspect, a way of sensing voltage inside a sensible meter is disclosed. FIG. 1 is an illustration of smart meter system.

FIG. 2 is an illustration of a wise meter in accordance with an embodiment. FIG. 1 is an illustration of the smart meter system 50 in accordance with an embodiment. FIG. 2 is an illustration of a sensible meter three in accordance with an embodiment. Although the current invention has been described in accordance with the embodiments proven, one in all abnormal ability in the art will readily acknowledge that there might be variations to the embodiments and those variations can be throughout the spirit and scope of the present invention. The following description is offered to enable one in every of abnormal talent within the art to make and use the invention and is offered in the context of a patent utility and its necessities. Accordingly, many modifications may be made by one among abnormal ability within the artwork without departing from the spirit and scope of the present invention. Thus, the present invention is just not intended to be restricted to the embodiments shown, however is to be accorded the widest scope in line with the rules and features described herein.