Method of controlling water supply by a sensitive faucet capable of automatically adjusting a detected distance

Abstract

A method of controlling water supply by a sensitive faucet capable of automatically adjusting a detected distance comprises steps of: (A) automatically adjusting a detected distance which uses a transmitting unit to emit a pulse to a background, detects a reflection value of the pulse and adjusts the pulse width via a controlling unit; (B) defining a background value which emits the pulse to the background and detects the reflected pulse for setting the reflection value as a background value; and (C) determining a user state which periodically emits the pulse, detects the reflected pulse and determines a user state according to the reflection value for the controlling unit to control a faucet unit open to supply water. Accordingly, the sensitive faucet automatically adjusts a detected distance, for saving water and electricity.

1 . A method of controlling water supply by a sensitive faucet capable of automatically adjusting a detected distance comprises:
 (A) a step of automatically adjusting a detected distance which uses a transmitting unit to emit a pulse to a background, then uses a monitoring unit to detect a reflection value of said pulse that is reflected from said background as a reflected pulse and send said reflection value to a controlling unit, and then adjusts a pulse width of said transmitting unit according to said reflection value, wherein when said reflection value is higher than a predetermined value stored in said controlling unit, said reflection value considerably causes said pulse width of said transmitting unit to decrease and emits another corresponding pulse, so that when said reflection value is lower than or close to said predetermined value, said pulse width of said transmitting unit is thence saved in said controlling unit;   (B) a step of defining a background value which emits said pulse toward said background and detects said reflected pulse according to said pulse width of said transmitting unit saved in said controlling unit in said step (A), so that said reflection value of said reflected pulse is defined as a background value and stored in said controlling unit for setting to a standby state; and   (C) a step of determining a user state which periodically emits said pulse, detects said reflected pulse, and determines a user state according to said reflection value of said reflected pulse, wherein when said reflection value is higher than said background value, said controlling unit controls a faucet unit open to supply water and continuously emits said pulse and detects said reflected pulse, so that when said reflection value is close to said background value, said controlling unit closes said faucet unit and sets to a standby state, facilitating to attain a sensitive faucet that is able to automatically adjust a detected distance, determine said user state in light of said reflection value and use said controlling unit to control said faucet open to supply water for saving water and electricity.   
     
     
         2 . The method as claimed in  claim 1 , wherein a water saving mode is actuated while said faucet unit in said step (C) is set open to supply water; said water saving mode automatically stops supplying water after a predetermined period of water supplying, so that said sensitive faucet is then set to a standby state. 
     
     
         3 . The method as claimed in claim.  1 , wherein said water saving mode automatically stops supplying water after said faucet unit is set open for 30 seconds. 
     
     
         4 . The method as claimed in  claim 1 , wherein when said reflection value of said reflected pulse in said step (C) is larger than said background value and is set static within a predetermined time, said reflection value of said reflected pulse considerably causes said background value to increase. 
     
     
         5 . The method as claimed in  claim 4 , wherein said controlling unit controls said faucet unit open to supply water and automatically closes said faucet unit after supplying water for 30 seconds, and after closing said faucet unit, when said reflection value of said reflected pulse is larger than said background value and is set static within 3 seconds, said reflection value of said reflected pulse considerably causes said background value to increase. 
     
     
         6 . The method as claimed in  claim 1 , wherein a fixed value is stored in said controlling unit and said background value is the sum of said reflection value and said fixed value. 
     
     
         7 . The method as claimed in  claim 4 , wherein a fixed value is stored in said controlling unit, and said background value is the sum of said reflection value and said fixed value. 
     
     
         8 . The method as claimed in  claim 1 , wherein said transmitting unit in said step (C) emits said pulse to said background and detects said reflected pulse at intervals of 0.3 seconds. 
     
     
         9 . The method as claimed in  claim 1 , wherein said faucet uses a battery as a resource and said controlling unit activates an alarm device by flashing for warning when said battery provides with insufficient electricity.