Apparatus and method for liquid level measurement in a sounding tube
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G01S-013/08
G01S-015/08
G01F-023/00
출원번호
US-0027690
(2001-12-21)
발명자
/ 주소
Wilkie, Neil T.
Topputo, Michael L.
출원인 / 주소
Ohmart VEGA Corporation
대리인 / 주소
Wood, Herron & Evans, L.L.P.
인용정보
피인용 횟수 :
12인용 특허 :
5
초록▼
A level sensing apparatus for attachment to a vessel to measure levels of contents in a tank of the vessel. The level sensing apparatus includes a housing, a transmitter disposed within and operatively connected to said housing, and an antenna operatively connected to the transmitter for directing e
A level sensing apparatus for attachment to a vessel to measure levels of contents in a tank of the vessel. The level sensing apparatus includes a housing, a transmitter disposed within and operatively connected to said housing, and an antenna operatively connected to the transmitter for directing electrical and/or mechanical waves in a direction away from the transmitter. The antenna is further adapted to receive electrical and/or mechanical waves. The level sensing apparatus further includes a mounting system affixing the level sensing apparatus to a vessel. The mounting system is adapted such that the mounting system can be placed in a first position while the transmitter is affixed to the vessel, wherein levels of contents in a tank can be measured with electrical and/or mechanical waves, or in a second position while the transmitter is affixed to the vessel, wherein levels of contents in a tank can be measured manually.
대표청구항▼
A level sensing apparatus for attachment to a vessel to measure levels of contents in a tank of the vessel. The level sensing apparatus includes a housing, a transmitter disposed within and operatively connected to said housing, and an antenna operatively connected to the transmitter for directing e
A level sensing apparatus for attachment to a vessel to measure levels of contents in a tank of the vessel. The level sensing apparatus includes a housing, a transmitter disposed within and operatively connected to said housing, and an antenna operatively connected to the transmitter for directing electrical and/or mechanical waves in a direction away from the transmitter. The antenna is further adapted to receive electrical and/or mechanical waves. The level sensing apparatus further includes a mounting system affixing the level sensing apparatus to a vessel. The mounting system is adapted such that the mounting system can be placed in a first position while the transmitter is affixed to the vessel, wherein levels of contents in a tank can be measured with electrical and/or mechanical waves, or in a second position while the transmitter is affixed to the vessel, wherein levels of contents in a tank can be measured manually. transponder the transceiver device checks the crypto-code signal to determine motor vehicle access authorization of the transponder; wherein the transceiver device actuates a motor vehicle access function associated with the respective transmitter of the transceiver device upon determining that the transponder has proper motor vehicle access authorization. 3. The device of claim 2 wherein: each transmitter of the transceiver device is positioned at separate locations within the motor vehicle, wherein each transmitter of the transceiver device transmits a respective code signal in a transmission region adjacent to the location of the transmitter in the motor vehicle. 4. The device of claim 2 wherein: the transmitters of the transceiver device transmit respective code signals using a low frequency carrier signal, the transceiver unit of the transceiver device transmits the key interrogation signal using a high frequency signal, and the transmitter of the transponder transmits the response signal and the crypto-code signal using a high frequency carrier signal. 5. The device of claim 4 wherein: the low frequency carrier signal falls within a range of 1 KHZ and 135 KHZ. 6. The device of claim 4 wherein: the high frequency carrier signal falls within a range of 1 MHZ and 10 GHZ. 7. The device of claim 2 wherein: the code signals transmitted by the respective transmitters of the transceiver device are time slot coded so that the code signals are transmitted periodically in respective time intervals. 8. The device of claim 2 wherein: the code signals transmitted by the respective transmitters of the transceiver device include different codes. 9. The device of claim 2 wherein: the code signals, the key interrogation signal, the response signal, and the crypto-code signals are phase locked. 10. The device of claim 2 wherein: a transceiver device is operable to identify simultaneously a plurality of transponders by using anti-collision protocol. 11. The device of claim 2 wherein: the transceiver unit of the transceiver device has a plurality of antennas each corresponding to a respective transmitter of the transceiver device for receiving the response signal and the crypto-code signal, wherein each antenna is directed in the direction in which the respective transmitter of the transceiver device transmits. 12. The device of claim 2 wherein: the transponder includes a reception coil for charging a battery of the transponder. 13. The access control device of claim 2 wherein: the transponder has a ferrite core antenna. 14. The device of claim 2 wherein: the transponder has an air coil antenna. 15. The device of claim 2 wherein: the transponder has a manually operable HF transmission button for transmitting a signal to the transceiver unit of the transceiver device. 16. A keyless method for checking access authorization in motor vehicles, the method comprising: transmitting respective code signals from a plurality of transmitters of a transceiver device in a motor vehicle; transmitting a key interrogation signal from a transceiver unit of the transceiver device; receiving the code signals with a receiver of a mobile transponder; receiving the key interrogation signal with the receiver of the mobile transponder; transmitting a response signal from a transmitter of the mobile transponder upon the receiver of the transponder receiving a code signal from a respective transmitter of the transceiver device, the response signal indicative of the respective transmitter of the transceiver device; transmitting a crypto-code signal from the transmitter of the transponder upon the receiver of the transponder receiving a key interrogation signal from the transceiver unit of the transceiver device; receiving the response signal and the crypto-code signal with the transceiver unit of the transceiver device; checking the crypto-code signal to determine motor vehicle access autho rization of the transponder with the transceiver device upon the transceiver unit of the transceiver device receiving a crypto-code signal from the transmitter of the transponder; and actuating a motor vehicle access function associated with the respective transmitter of the transceiver device using the transceiver device upon the transceiver device determining that the transponder has proper motor vehicle access authorization. 17. The method of claim 16 further comprising: positioning each transmitter of the transceiver device at separate locations within the motor vehicle, wherein transmitting respective code signals from a plurality of transmitters of a transceiver device in a motor vehicle includes transmitting a respective code signal in a transmission region adjacent to the location of the transmitter in the motor vehicle. 18. The method of claim 16 wherein: transmitting respective code signals includes transmitting respective code signals using a low frequency carrier signal, and transmitting a key interrogation signal, a response signal, and a crypto-code signal includes transmitting a key interrogation signal, a response signal, and a crypto-code signal using a high frequency carrier signal. 19. The method of claim 16 wherein: the respective codes signals transmitted by the transmitters of the transceiver device are time slot coded so that the code signals are transmitted periodically in respective time intervals. 20. The method of claim 16 wherein: the respective code signals transmitted by the transmitters of the transceiver device include different codes. a first detection circuit and including a second detection circuit connected to said one end of said door contact chain for indicating tat said first detection circuit is operational. 8. The device according to claim 7 wherein said second detection circuit includes at least one LED that is lighted to generate an operating signal indicating tat said first detection circuit is operational. 9. The device according to claim 8 wherein said one LED is turned off to indicate that said first detection circuit is not operational. 10. A device for signaling the position of an elevator car in an elevator installation during a passenger evacuation, the elevator installation including a plurality of landing door safety contacts connected in series in a door contact chain, each of the landing door safety contacts being associated with a separate landing door at one of a plurality of floors served by the elevator car, each of the landing door safety contacts being normally closed and being opened in response to the presence of the elevator ear at the associated landing door; comprising: a source of electrical power connected to one end of a door contact chain; and a detection circuit adapted to be connected to an end of the door contact chain opposite said electrical power source, said detection circuit being responsive to power provided by said electrical power source for indicating to a rescuer person adjacent a controller for an elevator car a presence of the elevator car at one of the landing doors, whereby when said electrical power source and said detection circuit are connected to the door contact chain, said detection circuit generates a first indication signal when all the landing door safety contacts of the door contact chain are closed representing an absence of the elevator car from the landing doors and generates a second indication signal when one of the landing door safety contacts is open representing a presence of the elevator car at the associated landing door. 11. The device according to claim 10 wherein said detection circuit includes at least one LED that is lighted to generate said first indication signal and is turned off to generate said second indication signal. 12. The device according to claim 10 wherein said detection circuit includes at least one LED that is lighted to generate said first indication signal, an inverter transistor connected in series with said one LED, an opto-coupler for actuating said inverter transistor and a capacitor connected between said door contact and said opto-coupler. 13. The device according to claim 10 wherein said electrical power source includes a frequency generator connected to the door contact chain through a capacitor. 14. The device according to claim 10 wherein said electrical power source includes adjacent an elevator control unit associated with the elevator car. 15. A device for signaling the position of an elevator car during a passenger evacuation, comprising: a plurality of landing door safety contacts connected in series in a door contact chain, each said landing door safety contact being associated with a separate lauding door at one of a plurality of floors served by the elevator ear, each said landing door safety contact being normally closed and being opened in response to the presence of the elevator car at the associated landing door; a source of electrical power connected to one end of said door contact chain; and a detection circuit connected to an end of said door contact chain opposite said electrical power source and mounted remotely from an area of the landing doors, said detection circuit being responsive to power provided by said electrical power source for indicating to a rescuer person a presence of the elevator car at one of the landing doors, said detection circuit generating a first indication signal when all said landing door safety contracts are closed representing an absence of the elevator car from the landing doors and generating a se
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이 특허에 인용된 특허 (5)
Wilke Neil T. ; Topputo Michael L., Apparatus and method for liquid level measurement and content purity measurement in a sounding tube.
Josef Fahrenbach DE; Jurgen Motzar DE; Jurgen Dietmeier DE; Gunter Rapp DE, Fluid level measuring device measuring fluid level in a container at high temperatures and/or high pressures and/or in a chemically aggressive environment using microwaves.
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