公开(公告)号：US20240302226A1

公开(公告)日：2024-09-12

申请号：US18599247

申请日：2024-03-08

Applicant: TDK Corporation

Inventor： Tetsuya SASAHARA ,  Ken UNNO ,  Masanori KOBAYASHI ,  Tetsuo HATA ,  Lucie OUEDRAOGO

IPC: G01L1/22 ,  G01L1/16

CPC classification number: G01L1/2262 ,  G01L1/16 ,  G01L1/2281

Abstract: A strain measuring system includes a piezoelectric element and a resistor provided on an object. The system also includes a resistance detection circuit to detect a change in resistance of the resistor, and a piezoelectric effect detection circuit to detect a piezoelectric effect of the piezoelectric element. A strain calculation circuit detects a strain changing time while the strain of the object is changing using a detection result from the piezoelectric effect detection circuit, calculates a change in resistance of the resistor during the strain changing time, and calculates a degree of strain of the object using a calculation result of the change in resistance.

公开(公告)号：US11965789B2

公开(公告)日：2024-04-23

申请号：US17885370

申请日：2022-08-10

Applicant: Intuitive Surgical Operations, Inc.

Inventor： Ashwinram Suresh

IPC: G01L5/00 ,  A61B90/00 ,  G01L1/22 ,  G01L5/1627

CPC classification number: G01L1/2262 ,  A61B90/06 ,  G01L1/2281 ,  G01L1/2287 ,  G01L5/1627 ,  A61B2090/064

Abstract: A force sensor comprising a beam having a longitudinal axis and a proximal end portion and a distal end portion; a first Wheatstone bridge disposed on a first face of the beam, including multiple tension gauge resistors and multiple compression gauge resistors; a second Wheatstone bridge disposed on the first face of the beam, including multiple tension gauge resistors and multiple compression gauge resistors; wherein at least one tension gauge resistor and at least one compression gauge resistor from each of the first and second Wheatstone bridges is disposed at a proximal end portion of the beam; wherein at least one tension gauge resistor and at least one compression gauge resistor from each of the first and second Wheatstone bridges is disposed at a distal end portion of the beam.

公开(公告)号：US11947734B2

公开(公告)日：2024-04-02

申请号：US18320630

申请日：2023-05-19

Applicant: GOERTEK INC.

Inventor： Hirotada Taniuchi

IPC: G06F3/03 ,  G01L1/22

CPC classification number: G06F3/03 ,  G01L1/2262 ,  G01L1/2281

Abstract: An apparatus and a method for force sensing, and an electronic device. The apparatus includes at least one first sensor, at least one second sensor, and a comparator. The at least one first sensor generates a first signal, the at least one second sensor generates a second signal, and the comparator receives both the first signal and the second signal. The first signal is determined by deformation of a deformable portion and temperature at the deformable portion, and the second signal is determined by the temperature at the deformable portion. The comparator determines whether the deformable portion deforms based on the first signal, the second signal, and the threshold signal, and further generates the third signal which is in the active state in response to the determination being positive. The apparatus can make an accurate response when the deformation of the deformable portion serves as an input operation.

公开(公告)号：US20190187014A1

公开(公告)日：2019-06-20

申请号：US16330776

申请日：2017-09-07

Applicant: LUFTHANSA TECHNIK AG

Inventor： Christian Werner-Spatz ,  Malte Blume-Werry ,  Jens Friedrichs ,  Marc Bauer ,  Detlev Wulff

IPC: G01L5/13

CPC classification number: G01L5/133 ,  G01L1/2281 ,  G01L25/00

Abstract: A method determines a thrust force of an aircraft engine that is attached to an aircraft by a force transferring element having a strain gauge for determining its strain state and a temperature sensor for measuring a surface temperature of the force transferring element adjacent to the strain gauge. The method includes: determining the surface temperature; determining a strain of the force transferring element; determining the strain state of the force transferring element based on the determined strain and compensating for temperature effects by taking into account the surface temperature, the compensation of the temperature effects taking into account both static and transient influences; and calculating the thrust force of the aircraft engine from the determined strain state.

公开(公告)号：US20190003914A1

公开(公告)日：2019-01-03

申请号：US15636886

申请日：2017-06-29

Applicant: Rosemount Inc.

Inventor： David Alexander Andrew ,  David Matthew Strei

IPC: G01L19/14 ,  G01L19/06 ,  G01L19/00 ,  G01L1/22

CPC classification number: G01L19/147 ,  G01L1/2281 ,  G01L9/00 ,  G01L9/0075 ,  G01L19/0038 ,  G01L19/0069 ,  G01L19/0645

Abstract: A pressure sensor assembly for use in sensing a pressure of a process fluid in a high temperature environment includes an elongate sensor housing configured to be exposed to the process fluid and having a cavity formed therein. A pressure sensor is positioned in the cavity of the elongate sensor housing. The pressure sensor has at least one diaphragm that deflects in response to applied pressure and includes an electrical component having an electrical property which changes as a function of deflection of the at least one diaphragm which is indicative of applied pressure. A flexible membrane in contact with the at least one diaphragm is disposed to seal at least a portion of the cavity of the sensor housing from the process fluid and flexes in response to pressure applied by the process fluid to thereby cause deflection of the at least one diaphragm.

公开(公告)号：US09947255B2

公开(公告)日：2018-04-17

申请号：US15274942

申请日：2016-09-23

Applicant: Apple Inc.

Inventor： Zhen Zhang ,  Izhar Ahmed ,  Hoon Sik Kim

IPC: G09G5/00 ,  G09G3/00

CPC classification number: G09G3/006 ,  G01L1/2281 ,  G09G3/20 ,  G09G3/32 ,  G09G2300/0426 ,  G09G2330/12 ,  G09G2380/02 ,  G11C19/28 ,  H01L27/3276 ,  H01L51/0031 ,  H01L51/0097

Abstract: An electronic device may have a flexible display such as an organic light-emitting diode display. A strain sensing resistor may be formed on a bent tail portion of the flexible display to gather strain measurements. Resistance measurement circuitry in a display driver integrated circuit may make resistance measurements on the strain sensing resistor and a temperature compensation resistor to measure strain. A crack detection line may be formed from an elongated pair of traces that are coupled at their ends to form a loop. The crack detection line may run along a peripheral edge of the flexible display. Crack detection circuitry may monitor the resistance of the crack detection line to detect cracks. The crack detection circuitry may include switches that adjust the length of the crack detection line and thereby allow resistances to be measured for different segments of the line.

公开(公告)号：US20180073944A1

公开(公告)日：2018-03-15

申请号：US15640473

申请日：2017-07-01

Applicant: Apple Inc.

Inventor： Daniel J.B. Bechstein

IPC: G01L1/22

CPC classification number: G01L1/2281 ,  G01B7/16 ,  G01L1/2287 ,  G01L1/2293 ,  G01L1/26

Abstract: Embodiments are directed to a strain sensor having a thermally conductive element and methods related to the use thereto. In one aspect, an embodiment includes a substrate. A first strain-sensitive element may be positioned on a first surface of the substrate and a second strain-sensitive element may be positioned on a second surface of the substrate. The embodiment may further include a thermally conductive post positioned within the substrate and extending beyond at least one of the first or second surfaces. The embodiment may further include a thermally conductive plate separated from the substrate and attached to the thermally conductive post.

公开(公告)号：US20180053455A1

公开(公告)日：2018-02-22

申请号：US15274942

申请日：2016-09-23

Applicant: Apple Inc.

Inventor： Zhen Zhang ,  Izhar Ahmed ,  Hoon Sik Kim

IPC: G09G3/00

CPC classification number: G09G3/006 ,  G01L1/2281 ,  G09G3/20 ,  G09G3/32 ,  G09G2300/0426 ,  G09G2330/12 ,  G09G2380/02 ,  G11C19/28 ,  H01L27/3276 ,  H01L51/0031 ,  H01L51/0097

Abstract: An electronic device may have a flexible display such as an organic light-emitting diode display. A strain sensing resistor may be formed on a bent tail portion of the flexible display to gather strain measurements. Resistance measurement circuitry in a display driver integrated circuit may make resistance measurements on the strain sensing resistor and a temperature compensation resistor to measure strain. A crack detection line may be formed from an elongated pair of traces that are coupled at their ends to form a loop. The crack detection line may run along a peripheral edge of the flexible display. Crack detection circuitry may monitor the resistance of the crack detection line to detect cracks. The crack detection circuitry may include switches that adjust the length of the crack detection line and thereby allow resistances to be measured for different segments of the line.

公开(公告)号：US20180039363A1

公开(公告)日：2018-02-08

申请号：US15786007

申请日：2017-10-17

Applicant: Shanghai Tianma Micro-Electronics Co., Ltd.

Inventor： Liang LIU ,  Feng LU ,  Zaiwen ZHU

IPC: G06F3/041 ,  G06F3/045 ,  G02F1/1333

CPC classification number: G06F3/0412 ,  G01L1/205 ,  G01L1/2281 ,  G02F1/13338 ,  G06F3/0414 ,  G06F3/045

Abstract: An array substrate, a touch display panel, and a touch display device are provided. The array substrate includes a plurality of pressure sensors. Each pressure sensor includes a first input terminal electrically connected to a first power input terminal, and a second input terminal electrically connected to a second power input terminal. The array substrate also includes a first connection line between the first input terminal of each pressure sensor and the first power input terminal. The first connection line has a first line resistance. In addition, the array substrate includes a second connection line between the second input terminal of each pressure sensor and the second power input terminal. The second connection line has a second line resistance. Further, the array substrate includes a ratio of a resistance of each pressure sensor to a sum of the corresponding first line resistance and second line resistance is the same.

公开(公告)号：US09851845B2

公开(公告)日：2017-12-26

申请号：US14793987

申请日：2015-07-08

Applicant: Apple Inc.

Inventor： John S. Smith ,  Manu Agarwal

IPC: G06F3/041 ,  G06F3/044 ,  G06F3/045 ,  G01L1/18 ,  G01L1/20 ,  G01L1/16 ,  G01L1/00 ,  G01L1/22 ,  G01L25/00

CPC classification number: G06F3/0418 ,  G01L1/18 ,  G01L1/2281 ,  G01L1/2293 ,  G01L25/00 ,  G06F3/0414

Abstract: An optically transparent force sensor element compares a force reading from a first strain-sensitive film element with a second strain-sensitive film element, having a compliant and thermally conductive intermediate layer positioned therebetween to compensate for temperature changes. While in the idle state, the optically transparent force sensor can be periodically calibrated to account for additional changes in temperature.