问题 问答题

IC卡家用膜式燃气表的工作原理是什么?

答案

参考答案:

IC卡燃气表是在膜式燃气表的基础上加上控制部分、阀门、信号获取装置、电源、显示装置等部件,通过卡座与IC卡交互而得到相应的控制信息,在控制信息的基础上,微处理器做相应的处理。当一个计量单位(一般是0.01m3或0.1m3)的燃气经过后,磁敏元件就发出一个脉冲信号给主控制电路用以计数。IC卡燃气表通过主控制电路对燃气表进气阀门进行开关控制,从而达到控制用户用气的目的。如果燃气表内剩余量为零时,主控制电路就关闭阀门,燃气就不能通过,这时需要用户到燃气部门进行购气。燃气部门通过售气系统软件对IC卡进行操作,将一定气量信息写入卡内,用户再将卡插入IC卡燃气表内,燃气表将卡内信息读入表内存储器,主控电路就会打开阀门,燃气就可以通过。IC卡燃气表的信息(气存量、开关闭状态、电池状态等)可通过液晶显示了解。

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When it comes to eating smart for your heart, stop thinking about short-term solutions and simplify your life with a straightforward approach that will serve you well for years to come.

Smart eating goes beyond analyzing every bite of food you lift  36  your mouth. “In the past we used to believe that  37  amounts of individual nutrients were the 38 to good health,” Linda Van Horn, professor of the American Heart Association's Nutrition Committee. "But now we have a 39 understanding of healthy eating and the kinds of food necessary to  40  not only heart disease but disease  41  general," she adds.

Scientists now  42 on the broader picture of the balance of food eaten  43  several days or a week  44 than on the number of milligrams of this or that  45  at each meal.

Fruits, vegetables and whole grains, for example, provide nutrients and plant-based compounds 46 to good health. “The more we learn, the more  47  we are by the wealth of essential substances they  48 ," Van Horn continues, "and how they  49  with each other to keep us healthy."

You'll automatically be  50  the right heart-healthy track if vegetables, fruits and whole grains make 51  three quarters of the food on your dinner plate. 52  in the remaining one quarter with lean meat or chicken, fish or eggs.

The foods you choose to eat as well as those you choose to  53  clearly contribute to your well-being. Without a  54 , each of the small decisions you make in this can make a big 55  on your health in the years to come.

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