[특허]Electronic faucet with a capacitive sensing system and a method therefor

Masco Corporation of Indiana

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특허 상세정보

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Electronic faucet with a capacitive sensing system and a method therefor

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F16K-037/00
미국특허분류(USC)	137/001; 137/624.11; 137/551; 137/801; 251/129.04; 004/623
출원번호	US-0642462 (2011-04-20)
등록번호	US-8776817 (2014-07-15)
국제출원번호	PCT/US2011/033241 (2011-04-20)
§371/§102 date	20121019 (20121019)
국제공개번호	WO2011/133665 (2011-10-27)
발명자 / 주소	Sawaski, Joel D. Veros, Michael J.
출원인 / 주소	Masco Corporation of Indiana
대리인 / 주소	Faegre Baker Daniels LLP
인용정보	피인용 횟수 : 8 인용 특허 : 350

초록

An electronic faucet (10) comprises a spout (12) having a passageway configured to conduct fluid flow through the spout, an electrically operable valve coupled to the passageway, and a single capacitive sensor (26) coupled to a portion of the faucet. The single capacitive sensor provides both a touch sensor and a proximity sensor for the electronic faucet.

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1. An electronic faucet comprising: a spout having a passageway configured to conduct fluid flow through the spout;an indicator;an electrically operable valve coupled to the passageway;a single capacitive sensor coupled to a portion of the faucet, the single capacitive sensor providing both a touch sensor and a proximity sensor for the electronic faucet; anda controller coupled to the capacitive sensor, the controller being configured to monitor an output signal from the capacitive sensor to detect when a portion of the faucet is touched by a user and to detect when a user's hands are located in a detection area located near the spout, the controller being configured to actuate the electrically operable valve to start fluid flow through the spout in a first touch mode of operation in response to detecting either of a tap or a grab of the spout and to actuate the electrically operable valve to start fluid flow through the spout in response to detecting a user's hands in the detection area via a second hands-free mode of operation, and wherein the controller further actuates the indicator in first and second distinguishable patterns to provide an indication whether the faucet is operating in the first touch mode of operation or the second hands-free mode of operation. 2. The faucet of claim 1, wherein the capacitive sensor includes an electrode coupled to the spout. 3. The faucet of claim 1, wherein the controller is configured to operate the faucet in one of the first mode of operation in which the proximity sensor is inactive and the second mode of operation in which the proximity sensor is active. 4. The faucet of claim 3, wherein the controller toggles the faucet between the first mode of operation and the second mode of operation in response to a predetermined pattern of touching of the faucet. 5. The faucet of claim 3, further comprising a manual valve located in series with the electrically operable valve, and a manual handle configured to control the manual valve, and wherein the controller toggles the faucet between the first mode of operation and the second mode of operation in response to substantially simultaneous touching of the spout and the handle. 6. The faucet of claim 3, further comprising a mode selector switch coupled to the controller to change between the first mode of operation and the second mode of operation. 7. The faucet of claim 3, wherein the controller is also coupled to the electrically operable valve to control the electrically operable valve is response to changes in the output signal from the capacitive sensor. 8. The faucet of claim 7, wherein the controller toggles the electrically operable valve from a closed position to an open position in response to detecting a user's hands in the detection area when the faucet is in the second mode of operation. 9. The faucet of claim 1, further comprising a manual valve located in series with the electrically operable valve, and a manual handle configured to control the manual valve. 10. The faucet of claim 9, wherein the controller determines which one of the spout and the manual valve handle is touched by a user based upon an amplitude of the output signal from the capacitive sensor. 11. The faucet of claim 9, further comprising a faucet body hub, the manual valve handle being movably coupled to the faucet body hub to control the manual valve, the manual valve handle being electrically coupled to the faucet body hub, and wherein the spout is coupled to the faucet body hub by an insulator so that the spout is electrically isolated from the faucet body hub. 12. The faucet of claim 11, wherein the capacitive sensor includes a single electrode coupled to one of the spout and the manual valve handle. 13. A method of controlling fluid flow in an electronic faucet having a spout, a passageway configured to conduct fluid flow through the spout, an electrically operable valve coupled to the passageway, a manual valve located in series with the electrically operable valve, and a manual handle configured to control the manual valve, the method comprising: providing a single capacitive sensor coupled to a portion of the faucet;monitoring an output signal from the capacitive sensor to detect when a user touches at least one of the spout and the manual valve handle and to detect when a user's hands are located in a detection area located near the faucet;controlling the electrically operable valve is response to the step of monitoring the output signal, the controlling step including starting fluid flow through the spout in a first touch mode of operation in response to detecting either of a tap or a grab of the spout and starting fluid flow through the spout in response to detecting a user's hands in the detection area via a second hands-free mode of operation; andactuating an indicator in first and second distinguishable patterns to provide an indication whether the faucet is operating in the first touch mode of operation of operation or the second hands-free mode of operation. 14. The method of claim 13, wherein in the first mode of operation of the faucet the proximity sensor is inactive and in the second mode of operation of the faucet the proximity sensor is active; and further comprising selectively changing between the first and second modes of operation. 15. The method of claim 14, wherein the step of selectively changing between the first and second modes of operation comprises toggling the faucet between the first mode of operation and the second mode of operation in response to detecting a predetermined pattern of touching at least one of the spout and the manual valve handle. 16. The method of claim 15, wherein the predetermined pattern includes substantially simultaneous touching of the spout and the manual valve handle. 17. The method of claim 14, wherein the step of selectively changing between the first and second modes of operation comprises actuating a mode selector switch. 18. The method of claim 13, wherein the monitoring step includes distinguishing between a user tapping one of the spout and the manual valve handle, a user grabbing the spout, and a user grabbing the manual valve handle. 19. The method of claim 13, further comprising toggling the electronic valve between open and closed positions in response to detecting a user touching one of the spout and the manual valve handle during the monitoring step. 20. The method of claim 13, wherein the capacitive sensor includes an electrode coupled to one of the spout and the manual valve handle. 21. The method of claim 20, wherein the electrode is coupled to the spout, and wherein the manual valve handle is at least partially formed from a conductive material, and further comprising an insulator located between the spout and the manual valve handle to capacitively couple the conductive manual valve handle to the electrode. 22. The method of claim 20, wherein the electrode is coupled to one of the spout and the manual valve handle by a single wire. 23. The method of claim 14, further comprising toggling the electrically operable valve from a closed position to an open position in response to detecting a user's hands in the detection area when the faucet is in the second mode of operation. 24. The method of claim 23, further comprising toggling the electrically operable valve from the open position to the closed position in response to detecting that the user's hands have been removed from the detection area. 25. The method of claim 24, further comprising delaying toggling the electrically operable valve from the open position to the closed position for a predetermined time after detecting that the user's hands have been removed from the detection area, and maintaining the valve in the open position if the user's hands are subsequently detected in the detection area within the predetermined time. 26. The method of claim 13, wherein the monitoring step includes distinguishing between a user tapping the spout and a user grabbing the spout, and wherein the controlling step includes starting fluid flow through the spout in response to detecting a user's hands in the detection area via a hands-free mode of operation, maintaining fluid flow via a touch mode if a tap of the spout is detected within a time period less than a predetermined time after the hands-free mode is initiated, and shutting off fluid flow through the spout if a tap of the spout is detected at a time greater than the predetermined time after initiation of the hands-free mode. 27. The method of claim 26, wherein the controlling step further comprises maintaining fluid flow through the spout via the touch mode if a grab of the spout is detected within a time period less than the predetermined time after initiation of the hands-free mode, and maintaining fluid flow via the hands-free mode if a grab of the spout is detected at a time greater than the predetermined time after initiation of the hands-free mode. 28. The method of claim 13, wherein the monitoring step includes distinguishing between the user tapping a spout and a user grabbing a spout, and wherein the controlling step includes starting fluid flow through the spout in a touch mode of operation in response to detecting either of a tap or a grab of the spout, maintaining fluid flow through the spout in the touch mode in response to detecting the user's hands in the detection area or in response to a grab of the spout, and shutting off fluid flow through the spout in response to detecting a subsequent tap of the spout.

이 특허에 인용된 특허 (350)

이 특허를 인용한 특허 피인용횟수: 8

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Electronic faucet with a capacitive sensing system and a method therefor

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Electronic faucet with a capacitive sensing system and a method therefor

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