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預付費水表都有哪些種類?

瀏覽次數: 日期:2012-9-29

  預付費水表屬于智能水表的范疇,一般.是以速度(機械)式水表作為基表,常見的類型有IC卡水表、TM卡水表、射頻卡水表、代碼數據交換式水表和定量水表等。
  (1)IC卡水表
  IC卡水表是一種以IC卡為數據交換載體的預付費水表。我們常見的如IC卡公用電話所使用的IC卡和一些帶有芯片的銀行卡等就是IC卡。在卡的一個面上有一塊芯片,芯片上的觸點可與外界接觸來傳輸數據。按IC卡與外界數據傳送的形式等來分,有接觸型IC卡和非接觸型(又稱射頻感應型)IC卡兩種我們一般所說的IC卡水表通常指的是接觸型IC卡。
  (2)射頻卡水表
  射頻卡是一種非接觸式的IC卡。非接觸型.IC卡帶有射頻收發電路及其相關電路,不向外引出觸點。我們常用的公交IC卡就屬于這種類型.。射頻卡水表就是以射頻卡為數據交換載體的預付費水表。它的功能與IC卡水表基本相同。
  (3) TM卡水表
  TM卡水表也是一種非接觸式的智能預付費水表。它所使用的TM卡在飯店門鎖上應用較多,是一種具有IC卡功能的碰觸式存儲卡。
  (4)代碼數據交換式水表
  代碼數據交換式水表是一種采用代碼交換數據技術的智能預付費水表。代碼數據交換式水表使用一組變形的數據碼,而不是使用某種具體的數據交換載體(如IC卡)來傳輸和交換預付的·水購.置量數據。
  (5)定量水表是一種采用電氣控制或數控方式,在一定范圍內設置和控制用水量的水表。這是在IC卡類預付費表研制成功前的同類型表,常用于工業生產過程(如化工生產、建筑工程混凝土攪拌等)和投幣取水的場合。

所屬類別: 儀表常識

該資訊的關鍵詞為:

66彩
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