GB2620074A - Position-sensing via impedance estimation of a multi-coil electro-mechanical actuator - Google Patents
Position-sensing via impedance estimation of a multi-coil electro-mechanical actuator Download PDFInfo
- Publication number
- GB2620074A GB2620074A GB2315494.1A GB202315494A GB2620074A GB 2620074 A GB2620074 A GB 2620074A GB 202315494 A GB202315494 A GB 202315494A GB 2620074 A GB2620074 A GB 2620074A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- electromagnetic actuator
- sensing coil
- sensing
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000010355 oscillation Effects 0.000 claims abstract 10
- 238000006073 displacement reaction Methods 0.000 claims abstract 7
- 238000013507 mapping Methods 0.000 claims 15
- 238000000034 method Methods 0.000 claims 11
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R29/00—Monitoring arrangements; Testing arrangements
- H04R29/001—Monitoring arrangements; Testing arrangements for loudspeakers
- H04R29/003—Monitoring arrangements; Testing arrangements for loudspeakers of the moving-coil type
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
- G01R31/2829—Testing of circuits in sensor or actuator systems
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/016—Input arrangements with force or tactile feedback as computer generated output to the user
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/007—Protection circuits for transducers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2400/00—Loudspeakers
- H04R2400/03—Transducers capable of generating both sound as well as tactile vibration, e.g. as used in cellular phones
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Acoustics & Sound (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Otolaryngology (AREA)
- Health & Medical Sciences (AREA)
- Electromagnetism (AREA)
- General Health & Medical Sciences (AREA)
- Human Computer Interaction (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
A system may include an electromagnetic actuator and a processing subsystem configured to apply a low-frequency actuation signal on an actuation coil of the electromagnetic actuator to drive mechanical displacement of the electromagnetic actuator, apply high-frequency electrical stimulus to a sensing coil of the electromagnetic actuator, and sense a change in high-frequency impedance of the sensing coil in response to the high-frequency electrical stimulus over a full cycle of oscillation of the electromagnetic actuator.
Claims (33)
1. A system comprising: an electromagnetic actuator; and a processing subsystem configured to: apply a low-frequency actuation signal on an actuation coil of the electromagnetic actuator to drive mechanical displacement of the electromagnetic actuator; apply high-frequency electrical stimulus to a sensing coil of the electromagnetic actuator; and sense a change in high-frequency impedance of the sensing coil in response to the high-frequency electrical stimulus over a full cycle of oscillation of the electromagnetic actuator .
2. The system of Claim 1, wherein the actuation coil and the sensing coil are the same coil.
3. The system of Claim 1, wherein the actuation coil and the sensing coil are different coils.
4. The system of any of Claims 1-3, the processing subsystem further configured to: apply high-frequency electrical stimulus to a second sensing coil of the electromagnetic actuator; and sense a change in high-frequency impedance of the second sensing coil in response to the high-frequency electrical stimulus over a full cycle of oscillation of the electromagnetic actuator.
5. The system of any of Claims 1-3, the processing subsystem further configured to: apply a second low-frequency actuation signal on a second actuation coil of the electromagnetic actuator to drive mechanical displacement of the electromagnetic actuator; apply high-frequency electrical stimulus to a second sensing coil of the electromagnetic actuator; and sense a change in high-frequency impedance of the sensing coil in response to the high-frequency electrical stimulus over a full cycle of oscillation of the electromagnetic actuator.
6. The system of Claim 5, wherein the second actuation coil and the second sensing coil are the same coil.
7. The system of Claim 5, wherein the second actuation coil and the second sensing coil are different coils.
8. The system of Claim 5, wherein: the actuation coil is the same coil as the second sensing coil; and the second actuation coil is the same coil as the sensing coil.
9. The system of any of Claims 5-8, the processing subsystem further configured to: define a first mapping of the high-frequency impedance of the sensing coil as a first function of a position of the electromagnetic actuator based on sensed change in response to the high-frequency electrical stimulus applied to the sensing coil; and define a second mapping of the high-frequency impedance of the sensing coil as a second function of the position of the electromagnetic actuator based on sensed change in response to the high-frequency electrical stimulus applied to the second sensing coil.
10. The system of Claim 9, the processing subsystem further configured to merge the first mapping and the second mapping in order to calibrate the first function to the second function .
11. The system of any of Claims 1-10, the processing subsystem further configured define a mapping of a high-frequency impedance of the sensing coil as a function of a position of the electromagnetic actuator based on sensed change in response to the high-frequency electrical stimulus applied to the sensing coil.
12. A method comprising: applying a low-frequency actuation signal on an actuation coil of the electromagnetic actuator to drive mechanical displacement of the electromagnetic actuator; applying high-frequency electrical stimulus to a sensing coil of the electromagnetic actuator; and sensing a change in high-frequency impedance of the sensing coil in response to the high-frequency electrical stimulus over a full cycle of oscillation of the electromagnetic actuator.
13. The method of Claim 12, wherein the actuation coil and the sensing coil are the same coil.
14. The method of Claim 12, wherein the actuation coil and the sensing coil are different coils.
15. The method of any of Claims 12-14, further comprising: applying high-frequency electrical stimulus to a second sensing coil of the electromagnetic actuator; and sensing a change in high-frequency impedance of the second sensing coil in response to the high-frequency electrical stimulus over a full cycle of oscillation of the electromagnetic actuator.
16. The method of any of Claims 12-14, further comprising: applying a second low-frequency actuation signal on a second actuation coil of the electromagnetic actuator to drive mechanical displacement of the electromagnetic actuator; applying high-frequency electrical stimulus to a second sensing coil of the electromagnetic actuator; and sensing a change in high-frequency impedance of the sensing coil in response to the high-frequency electrical stimulus over a full cycle of oscillation of the electromagnetic actuator.
17. The method of Claim 16, wherein the second actuation coil and the second sensing coil are the same coil.
18. The method of Claim 16, wherein the second actuation coil and the second sensing coil are different coils.
19. The method of Claim 16, wherein: the actuation coil is the same coil as the second sensing coil; and the second actuation coil is the same coil as the sensing coil.
20. The method of any of Claims 16-19, further comprising: defining a first mapping of the high-frequency impedance of the sensing coil as a first function of a position of the electromagnetic actuator based on sensed change in response to the high-frequency electrical stimulus applied to the sensing coil; and defining a second mapping of the high-frequency impedance of the sensing coil as a second function of the position of the electromagnetic actuator based on sensed change in response to the high-frequency electrical stimulus applied to the second sensing coil.
21. The method of Claim 20, further comprising merging the first mapping and the second mapping in order to calibrate the first function to the second function.
22. The method of any of Claims 12-21, further comprising defining a mapping of a high-frequency impedance of the sensing coil as a function of a position of the electromagnetic actuator based on sensed change in response to the high- frequency electrical stimulus applied to the sensing coil.
23. An integrated circuit comprising: one or more outputs configured to: apply a low-frequency actuation signal on an actuation coil of the electromagnetic actuator to drive mechanical displacement of the electromagnetic actuator; and apply high-frequency electrical stimulus to a sensing coil of the electromagnetic actuator; and sensing circuitry configured to sense a change in high-frequency impedance of the sensing coil in response to the high-frequency electrical stimulus over a full cycle of oscillation of the electromagnetic actuator.
24. The integrated circuit of Claim 23, wherein the actuation coil and the sensing coil are the same coil .
25. The integrated circuit of Claim 23, wherein the actuation coil and the sensing coil are different coils.
26. The integrated circuit of any of Claims 23-25, wherein: the one or more outputs are further configured to apply high-frequency electrical stimulus to a second sensing coil of the electromagnetic actuator; and the sensing circuitry is further configured to sense a change in high-frequency impedance of the second sensing coil in response to the high-frequency electrical stimulus over a full cycle of oscillation of the electromagnetic actuator.
27. The integrated circuit of any of Claims 23-25, wherein: the one or more outputs are further configured to: apply a second low-frequency actuation signal on a second actuation coil of the electromagnetic actuator to drive mechanical displacement of the electromagnetic actuator; and apply high-frequency electrical stimulus to a second sensing coil of the electromagnetic actuator; and the sensing circuitry is further configured to sense a change in high-frequency impedance of the sensing coil in response to the high-frequency electrical stimulus over a full cycle of oscillation of the electromagnetic actuator.
28. The integrated circuit of Claim 27, wherein the second actuation coil and the second sensing coil are the same coil.
29. The integrated circuit of Claim 27, wherein the second actuation coil and the second sensing coil are different coils.
30. The integrated circuit of Claim 27, wherein: the actuation coil is the same coil as the second sensing coil; and the second actuation coil is the same coil as the sensing coil.
31. The integrated circuit of any of Claims 27-30, the sensing circuitry further configured to: define a first mapping of the high-frequency impedance of the sensing coil as a first function of a position of the electromagnetic actuator based on sensed change in response to the high-frequency electrical stimulus applied to the sensing coil; and define a second mapping of the high-frequency impedance of the sensing coil as a second function of the position of the electromagnetic actuator based on sensed change in response to the high-frequency electrical stimulus applied to the second sensing coil.
32. The integrated circuit of Claim 31, the sensing circuitry further configured to merge the first mapping and the second mapping in order to calibrate the first function to the second function .
33. The integrated circuit of any of Claims 23-32, the sensing circuitry further configured define a mapping of a high-frequency impedance of the sensing coil as a function of a position of the electromagnetic actuator based on sensed change in response to the high-frequency electrical stimulus applied to the sensing coil.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US202163186169P | 2021-05-09 | 2021-05-09 | |
| US17/568,248 US11948739B2 (en) | 2021-05-09 | 2022-01-04 | Minimizing transient artifact of position estimate in inductively-sensed electromagnetic actuator system with shared inductive sensor |
| PCT/US2022/020022 WO2022240475A1 (en) | 2021-05-09 | 2022-03-11 | Position-sensing via impedance estimation of a multi-coil electro-mechanical actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2620074A true GB2620074A (en) | 2023-12-27 |
Family
ID=81328097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2315494.1A Pending GB2620074A (en) | 2021-05-09 | 2022-03-11 | Position-sensing via impedance estimation of a multi-coil electro-mechanical actuator |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB2620074A (en) |
| WO (1) | WO2022240475A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2499026A (en) * | 2012-02-03 | 2013-08-07 | Canon Kk | A loudspeaker driver with sensing coils for sensing the position and velocity of a voice-coil |
| US20170256145A1 (en) * | 2014-02-13 | 2017-09-07 | Nxp B.V. | Multi-tone haptic pattern generator |
| US20180321748A1 (en) * | 2017-05-08 | 2018-11-08 | Cirrus Logic International Semiconductor Ltd. | Integrated haptic system |
| US20190103829A1 (en) * | 2017-09-29 | 2019-04-04 | Apple Inc. | Closed-loop control of linear resonant actuator using back emf and inertial compensation |
-
2022
- 2022-03-11 GB GB2315494.1A patent/GB2620074A/en active Pending
- 2022-03-11 WO PCT/US2022/020022 patent/WO2022240475A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2499026A (en) * | 2012-02-03 | 2013-08-07 | Canon Kk | A loudspeaker driver with sensing coils for sensing the position and velocity of a voice-coil |
| US20170256145A1 (en) * | 2014-02-13 | 2017-09-07 | Nxp B.V. | Multi-tone haptic pattern generator |
| US20180321748A1 (en) * | 2017-05-08 | 2018-11-08 | Cirrus Logic International Semiconductor Ltd. | Integrated haptic system |
| US20190103829A1 (en) * | 2017-09-29 | 2019-04-04 | Apple Inc. | Closed-loop control of linear resonant actuator using back emf and inertial compensation |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022240475A1 (en) | 2022-11-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102406688B1 (en) | Keyboard sensor systems and methods | |
| Kejı́k et al. | A low-cost inductive proximity sensor for industrial applications | |
| US11380470B2 (en) | Methods to control force in reluctance actuators based on flux related parameters | |
| CN103424128B (en) | Offset error compensation system and method in sensor | |
| WO2017036695A1 (en) | Actuator and sensor device based on electroactive polymer | |
| US7190159B2 (en) | Integral hall effect limit switch for control valve stem position sensor | |
| Ikeda et al. | High-precision positioning using a self-sensing piezoelectric actuator control with a differential detection method | |
| RU2554592C2 (en) | Method and device to record magnetic fields | |
| KR20160005657A (en) | Method for measuring a physical parameter and electronic circuit for implementing the same | |
| GB2620074A (en) | Position-sensing via impedance estimation of a multi-coil electro-mechanical actuator | |
| US9909944B2 (en) | Thin film sensor | |
| EP2009456A3 (en) | Radio frequency sensor systems, electromagnetic sensor arrays, and methods of manufacture | |
| EP2338032A2 (en) | Position sensor | |
| CN109643755A (en) | Magnetic Sensor and current sensor | |
| US20050192765A1 (en) | Signal measurement and processing method and apparatus | |
| US6496019B1 (en) | Temperature compensated pressure sensor network | |
| US11333481B2 (en) | Device and sensor for contactless distance and/or position determination of a measurement object | |
| Greenough et al. | The properties and applications of magnetostrictive rare-earth compounds | |
| JP2001314092A (en) | Method and device for temperature compensation of piezoelectric element | |
| EP2261682B1 (en) | Proximity sensor | |
| TW201300747A (en) | Force sensing device and force sensing system | |
| CN107192938A (en) | A kind of hardware signal processing method of silicon piezoresistive transducer | |
| WO2019121174A1 (en) | Magnetoresitive magnetic field sensor bridge with compensated cross-axis effect | |
| Wu et al. | Self-sensing of a solenoid valve via phase detection | |
| KR20200087219A (en) | Inductive sensor with reference sensor |