公开(公告)号：US3113282A

公开(公告)日：1963-12-03

申请号：US23092362

申请日：1962-10-16

Applicant: GEN MOTORS CORP

Inventor： COLEMAN RICHARD B

IPC: G01F23/68

CPC classification number: G01F23/68

公开(公告)号：US3106693A

公开(公告)日：1963-10-08

申请号：US20242462

申请日：1962-06-14

Applicant: LIQUIDOMETER CORP

Inventor： DE GIERS CLARENCE A

IPC: G01F23/68 ,  G01F23/70

CPC classification number: G01F23/70 ,  G01F23/68

公开(公告)号：US2627660A

公开(公告)日：1953-02-10

申请号：US14648050

申请日：1950-02-27

Applicant: SMITH PHILIP N

Inventor： SMITH PHILIP N

IPC: G01F23/00 ,  G01F23/44 ,  G01F23/68 ,  G01K1/02

CPC classification number: G01F23/68 ,  G01F23/0023 ,  G01F23/44 ,  G01K1/024

公开(公告)号：US1072642A

公开(公告)日：1913-09-09

申请号：US1912712683

申请日：1912-08-01

Applicant: PAP KAROLY

Inventor： PAP KAROLY

CPC classification number: G01F23/68

公开(公告)号：US443063A

公开(公告)日：1890-12-16

申请号：US443063D

CPC classification number: G01F23/68

公开(公告)号：US16182A

公开(公告)日：1856-12-09

申请号：US16182D

CPC classification number: G01F23/68

公开(公告)号：US12072226B2

公开(公告)日：2024-08-27

申请号：US17310912

申请日：2020-02-26

Applicant: MultiDimension Technology Co., Ltd.

Inventor： James Geza Deak ,  Elamparithi Visvanathan

IPC: G01F23/72 ,  G01F23/68 ,  G01R33/09

CPC classification number: G01F23/72 ,  G01F23/68 ,  G01R33/098

Abstract: A digital liquid level sensor based on a magnetoresistive sensor cross-point array includes tunnel magnetoresistance (TMR) magnetic sensor chips; a microcontroller electrically connected to a row decoder and a column decoder. The TMR magnetic sensor chips include magnetic tunnel junction (MTJ) elements. Diodes are connected between each row of MTJ elements and a row lead or a column lead. The TMR magnetic sensor chips are addressed using data decoded by the row decoder and the column decoder. The microcontroller is used for scanning addresses of the TMR magnetic sensor chips for the address of an MTJ element in the highest active state, converting the address value into a liquid level value in a linear proportional relationship therewith, and transmitting the liquid level value to an output interface. The power consumption of a sensor element is greatly minimized by powering only one sensor chip element each time.

公开(公告)号：US11809157B2

公开(公告)日：2023-11-07

申请号：US17208398

申请日：2021-03-22

Applicant: FISHER CONTROLS INTERNATIONAL LLC

Inventor： Kurtis K. Jensen ,  Andrew M. Prusha ,  Joseph F. DeMonte

IPC: G01F23/36 ,  G05B19/406 ,  G01F23/68

CPC classification number: G05B19/406 ,  G01F23/68 ,  G05B2219/41301

Abstract: The disclosed techniques enable the installation of a level sensor capable of continuously detecting a level of fluid in a vessel or tank and capable of being integrated in a larger control system. Advantageously, sensor head of the disclosed level sensor can be installed on existing installations with an existing displacer or float and an existing member or rod. The disclosed techniques thus enable process plants to easily and affordably replace pneumatic level sensors with a more environmentally friendly option.

公开(公告)号：US20190033118A1

公开(公告)日：2019-01-31

申请号：US15661877

申请日：2017-07-27

Applicant: PRATT & WHITNEY CANADA CORP.

Inventor： Eric TAILLON

IPC: G01F23/30

CPC classification number: G01F23/30 ,  G01F23/64 ,  G01F23/68 ,  G01F23/706 ,  G01F23/74

Abstract: Methods and systems for measuring a level of a fluid. A first output is obtained from first sensing elements at a first electrical circuit, the first sensing elements configured to produce the first output based on a position of a floater movable along a floater path. The position of the floater is determined at the first electrical circuit based on the first output. A second output is obtained from second sensing elements at a second electrical circuit, the second electrical circuit being isolated from the first electrical circuit, at least one of the first sensing elements being interleaved with at least one of the second sensing elements, the second sensing elements configured to produce the second output based on the position of the floater. The position of the floater is determined at the second electrical circuit based on the second output.

公开(公告)号：US09541024B2

公开(公告)日：2017-01-10

申请号：US14661609

申请日：2015-03-18

Applicant: Ford Global Technologies, LLC

Inventor： Aed M. Dudar

IPC: G01F25/00 ,  F02D41/22 ,  G01F23/30 ,  F02D41/04 ,  F16K31/06 ,  F02D41/24

CPC classification number: F02D41/222 ,  B60K35/00 ,  B60K2015/03217 ,  F02D41/0032 ,  F02D41/021 ,  F02D41/04 ,  F02D41/22 ,  F02D41/2451 ,  F02M25/0836 ,  F02M37/0082 ,  F16K31/06 ,  G01F23/303 ,  G01F23/68 ,  G01F25/0061 ,  Y02T10/40

Abstract: Methods and systems are provided for monitoring fuel level indicator noise in a sealed fuel tank system. In one example, the method includes comparing the outputs of a fuel level indicator and fuel tank pressure sensor in a sealed tank. If the outputs of both the fuel level indicator and the fuel tank pressure sensor outputs are noisy, then it may be determined that the fuel level indicator noise is mechanical in nature. However, if the fuel level indicator output is noisy while the fuel tank pressure sensor output is not noisy in the sealed tank, then it may be determined that the fuel tank pressure sensor noise is electrical in nature.

Abstract translation: 提供了用于监测密封燃料箱系统中的燃料液位指示器噪声的方法和系统。 在一个示例中，该方法包括比较密封罐中的燃料液位指示器和燃料箱压力传感器的输出。 如果燃料液位指示器和燃油箱压力传感器输出两者的输出都是噪声的，则可以确定燃油液位指示器噪声本质上是机械的。 然而，如果在密封箱中燃油箱压力传感器输出不嘈杂的情况下燃料油位指示器输出噪音，则确定燃油箱压力传感器噪声本质上是电气的。