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WATER-LEVEL DETECTING SYSTEM AND WATER-LEVEL DETECTING METHOD

  • US 20140260602A1
  • Filed: 10/24/2013
  • Published: 09/18/2014
  • Est. Priority Date: 03/18/2013
  • Status: Abandoned Application
First Claim
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1. A water-level detecting system comprising:

  • a water receiving module located in a vending machine;

    the water receiving module comprising a water tank, a floating block received in the water tank, and a connecting portion connected to the floating block;

    a first sliding rheostat connected to the connecting portion;

    a varicap connected to the first sliding rheostat;

    a frequency-to-voltage converter connected to the varicap;

    a comparing module connected to the frequency-to-voltage converter; and

    an indicator module connected to the comparing module;

    wherein the floating block is moveable by water in the water tank to slide a sliding terminal of the first sliding rheostat, a capacitance of the varicap is changeable when the sliding terminal of the first sliding rheostat is slide, a voltage of the frequency-to-voltage converter is changeable according to the capacitance of the varicap, the comparing module is configured to compare the voltage of the frequency-to-voltage converter with a predetermined voltage, and the indicator module is luminous when the voltage of the frequency-to-voltage converter is greater than the predetermined voltage.

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