CN105759142B - A kind of calibration method and system of wearable device skin capacitance threshold value - Google Patents
A kind of calibration method and system of wearable device skin capacitance threshold value Download PDFInfo
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- CN105759142B CN105759142B CN201610097162.0A CN201610097162A CN105759142B CN 105759142 B CN105759142 B CN 105759142B CN 201610097162 A CN201610097162 A CN 201610097162A CN 105759142 B CN105759142 B CN 105759142B
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
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Abstract
The invention discloses a kind of calibration methods and system of wearable device skin capacitance threshold value.The calibration method, including：The back of wearable device is placed in air, detects the capacitance C1 of capacitance detecting piece；The back of wearable device is positioned on copper sheet, detects the capacitance C2 of the capacitance detecting piece；Skin capacitance threshold value is calculated, the skin capacitance threshold value=(C2 C1) × P+C1, wherein P is preset proportion coefficient, using wearable device skin capacitance threshold value of the skin capacitance threshold value as after calibrating.The present invention utilizes capacitance characteristic of the capacitance detecting piece in different material, the skin capacitance threshold value of wearable device to producing calculates, wearable device skin capacitance threshold value after using the skin capacitance threshold value that is calculated as calibration, to determine the optimal skin capacitance threshold value of wearable device, as judge wearable device whether the threshold value with skin contact, effectively improve the accuracy of capacitance detecting piece detection skin, the requirement to technique in production is reduced simultaneously, greatly reduces production cost.
Description
Technical field
The present invention relates to technical field of intelligent equipment more particularly to a kind of calibration sides of wearable device skin capacitance threshold value
Method and system.
Background technology
The difference of other materials in the capacitance of skin and life is the effective auxiliary for judging whether to wear wearable device
Means.The method needs to place one piece of copper sheet at wrist-watch back, for detecting capacitance, however, due to production technology, it is raw
Each wrist-watch that output is come, the capacitance with skin contact have certain difference, this causes, and it is easy to appear erroneous judgements.At present
General way is the criterion for using fixed skin capacitance threshold value as contact skin, and the method is influenced by production technology
Seriously, must be requested that capacitance of each wrist-watch produced on same substance is maintained at a range being not much different,
But it is difficult to accomplish and cost is very high in technique.Based on the bad situation of capacitance detecting piece conformity of production, how capacitance is improved
The technical issues of accuracy for detecting skin is current urgent need to resolve.
Invention content
The present invention provides a kind of calibration methods and system of wearable device skin capacitance threshold value, utilize capacitance detecting piece
Capacitance characteristic in different material, the skin capacitance threshold value of the wearable device to producing calculates, to calculate
The skin capacitance threshold value arrived is as the wearable device skin capacitance threshold value after calibration, to determine the optimal skin of wearable device
Skin capacitance threshold value, as judge wearable device whether the threshold value with skin contact, effectively improve capacitance detecting piece detection skin
Accuracy, while reduce requirement to technique in production, greatly reduce production cost.
To realize above-mentioned design, the present invention uses following technical scheme：
On the one hand, a kind of calibration method of wearable device skin capacitance threshold value is provided.The calibration method, including：
The back of wearable device is placed in air, detects the capacitance C1 of capacitance detecting piece；
The back of wearable device is positioned on copper sheet, detects the capacitance C2 of the capacitance detecting piece；
Skin capacitance threshold value, the skin capacitance threshold value=(C2-C1) × P+C1 is calculated, wherein P is preset proportion
Coefficient, using wearable device skin capacitance threshold value of the skin capacitance threshold value as after calibrating.
Preferably, it is described to be calculated after skin capacitance threshold value, it further includes：Skin capacitance threshold value write-in can be worn
It wears in the flash of equipment, so that wearable device reads out the skin capacitance threshold value in each booting from flash, makees
Judge whether the threshold value with skin contact for wearable device.
Preferably, it after in the flash that the skin capacitance threshold value is written to wearable device, further includes：To institute
It states preset proportion FACTOR P to be adjusted, the skin pricktest is recalculated according to formula skin capacitance threshold value=(C2-C1) × P+C1
Hold threshold value.
Preferably, it is described that the skin capacitance threshold is recalculated according to formula skin capacitance threshold value=(C2-C1) × P+C1
After value, further include：The skin capacitance threshold value recalculated is written in the flash of wearable device, with to wearable device
Skin capacitance threshold value calibrated.
Preferably, the value range of the preset proportion FACTOR P is 0.5-0.6.
On the other hand, a kind of calibration system of wearable device skin capacitance threshold value is provided.The calibration system, including：
Air capacitive detection module for the back of wearable device to be placed in air, detects the electricity of capacitance detecting piece
Capacitance C1；
Copper sheet capacitive detection module for the back of wearable device to be positioned over copper sheet, detects the capacitance detecting
The capacitance C2 of piece；
Computing module, for being calculated skin capacitance threshold value, the skin capacitance threshold value=(C2-C1) × P+C1,
Middle P is preset proportion coefficient, using wearable device skin capacitance threshold value of the skin capacitance threshold value as after calibrating.
Preferably, it further includes：
Writing module, for the skin capacitance threshold value to be written in the flash of wearable device, so that wearable device
The skin capacitance threshold value is read out from flash in each booting, is judged whether as wearable device with skin contact
Threshold value.
Preferably, the computing module is additionally operable to：The preset proportion FACTOR P is adjusted, according to formula skin pricktest
Hold threshold value=(C2-C1) × P+C1 and recalculate the skin capacitance threshold value.
Preferably, said write module is additionally operable to：The skin capacitance threshold value write-in wearable device recalculated
In flash, calibrated with the skin capacitance threshold value to wearable device.
Preferably, the value range of the preset proportion FACTOR P is 0.5-0.6.
Compared with prior art, beneficial effects of the present invention are：The back of wearable device is placed in air, detection electricity
Hold the capacitance C1 of detection lug；The back of wearable device is positioned on copper sheet, detects the capacitance of the capacitance detecting piece
C2；Skin capacitance threshold value, the skin capacitance threshold value=(C2-C1) × P+C1 is calculated, wherein P is preset proportion coefficient,
Wearable device skin capacitance threshold value after using the skin capacitance threshold value as calibration.The present invention is using capacitance detecting piece not
Capacitance characteristic in commaterial, the skin capacitance threshold value of the wearable device to producing calculates, with what is be calculated
Skin capacitance threshold value is as the wearable device skin capacitance threshold value after calibration, to determine the optimal skin pricktest of wearable device
Hold threshold value, as judge wearable device whether the threshold value with skin contact, effectively improve capacitance detecting piece detect skin standard
True property, while the requirement in production to technique is reduced, greatly reduce production cost.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, institute in being described below to the embodiment of the present invention
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the present invention
Example for those of ordinary skill in the art, without creative efforts, can also be implemented according to the present invention
The content of example and these attached drawings obtain other attached drawings.
Fig. 1 is the calibration method of a kind of wearable device skin capacitance threshold value provided in the specific embodiment of the invention
The method flow diagram of first embodiment.
Fig. 2 is the calibration method of a kind of wearable device skin capacitance threshold value provided in the specific embodiment of the invention
The method flow diagram of second embodiment.
Fig. 3 is the calibration system of a kind of wearable device skin capacitance threshold value provided in the specific embodiment of the invention
The block diagram of first embodiment.
Fig. 4 is the calibration system of a kind of wearable device skin capacitance threshold value provided in the specific embodiment of the invention
The block diagram of second embodiment.
Specific embodiment
For make present invention solves the technical problem that, the technical solution that uses and the technique effect that reaches it is clearer, below
The technical solution of the embodiment of the present invention will be described in further detail with reference to attached drawing, it is clear that described embodiment is only
It is part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those skilled in the art exist
All other embodiments obtained under the premise of creative work are not made, shall fall within the protection scope of the present invention.
It please refers to Fig.1, is a kind of wearable device skin capacitance threshold value provided in the specific embodiment of the invention
The method flow diagram of the first embodiment of calibration method.As shown in the figure, this method, including：
Step S101：The back of wearable device is placed in air, detects the capacitance C1 of capacitance detecting piece.
The capacitance detecting piece is located on the inside of the back of wearable device, and the back of wearable device is placed in air,
Detect the capacitance C1 of capacitance detecting piece at this time.Preferably, the wearable device includes：Smartwatch and intelligent wrist etc..
Step S102：The back of wearable device is positioned on copper sheet, detects the capacitance C2 of the capacitance detecting piece.
Step S103：Skin capacitance threshold value, the skin capacitance threshold value=(C2-C1) × P+C1 is calculated, wherein P is
Preset proportion coefficient, using wearable device skin capacitance threshold value of the skin capacitance threshold value as after calibrating.
Capacitance detecting piece has following characteristic：1. for detecting the capacitance detecting piece of skin by factors such as circuit, structures
Influence, the capacitance that detected on same substance of individual for the different wearable devices produced has larger difference；
2. for every wearable device, be placed in life the capacitance on most of object and being positioned on skin have it is certain
Difference, it is generally minimum as the capacitance in air；3. it is placed on the capacitance of metallic copper on piece and is placed on human skin
Capacitance it is very close.These characteristics based on capacitance detecting piece carry out electricity to every wearable device that generation is completed
Hold calibration, to determine the optimal skin capacitance threshold value of wearable device, to improve the accuracy of capacitance detecting piece detection skin.
Formula skin capacitance threshold value=(C2-C1) × P+C1 is to be based on obtained from a large amount of experimental data, according to this formula to skin
Capacitance threshold value carries out calculating calibration, can obtain the optimal skin capacitance threshold value of wearable device.
Preferably, the value range of the preset proportion FACTOR P is 0.5-0.6.The preset proportion FACTOR P can be carried out
Setting to obtain the optimal skin capacitance threshold value of wearable device, improves the accuracy of capacitance detecting piece detection skin.
In conclusion the present embodiment utilizes capacitance characteristic of the capacitance detecting piece in different material, it can to what is produced
The skin capacitance threshold value of wearable device is calculated, using the skin capacitance threshold value that is calculated as calibration after wearable device
Skin capacitance threshold value, with determine wearable device optimal skin capacitance threshold value, as judge wearable device whether with skin
The threshold value of skin contact, effectively improves the accuracy of capacitance detecting piece detection skin, while reduces the requirement in production to technique,
Greatly reduce production cost.
It please refers to Fig.2, is a kind of wearable device skin capacitance threshold value provided in the specific embodiment of the invention
The method flow diagram of the second embodiment of calibration method.As shown in the figure, this method, including：
Step S201：The back of wearable device is placed in air, detects the capacitance C1 of capacitance detecting piece.
The capacitance detecting piece is located on the inside of the back of wearable device, and the back of wearable device is placed in air,
Detect the capacitance C1 of capacitance detecting piece at this time.Preferably, the wearable device includes：Smartwatch and intelligent wrist etc..
Step S202：The back of wearable device is positioned on copper sheet, detects the capacitance C2 of the capacitance detecting piece.
The back of wearable device is positioned on copper sheet, detects the capacitance C2 of capacitance detecting piece at this time.
Step S203：Skin capacitance threshold value, the skin capacitance threshold value=(C2-C1) × P+C1 is calculated, wherein P is
Preset proportion coefficient, using wearable device skin capacitance threshold value of the skin capacitance threshold value as after calibrating.
Capacitance detecting piece has following characteristic：1. for detecting the capacitance detecting piece of skin by factors such as circuit, structures
Influence, the capacitance that detected on same substance of individual for the different wearable devices produced has larger difference；
2. for every wearable device, be placed in life the capacitance on most of object and being positioned on skin have it is certain
Difference, it is generally minimum as the capacitance in air；3. it is placed on the capacitance of metallic copper on piece and is placed on human skin
Capacitance it is very close.These characteristics based on capacitance detecting piece carry out electricity to every wearable device that generation is completed
Hold calibration, to determine the optimal skin capacitance threshold value of wearable device, to improve the accuracy of capacitance detecting piece detection skin.
Formula skin capacitance threshold value=(C2-C1) × P+C1 is to be based on obtained from a large amount of experimental data, according to this formula to skin
Capacitance threshold value carries out calculating calibration, can obtain the optimal skin capacitance threshold value of wearable device.Preferably, the preset proportion
The value range of FACTOR P is 0.5-0.6.The preset proportion FACTOR P can be configured, to obtain the optimal of wearable device
Skin capacitance threshold value, improve the accuracy of capacitance detecting piece detection skin.
Step S204：The skin capacitance threshold value is written in the flash of wearable device, so that wearable device is every
The skin capacitance threshold value is read out during secondary booting from flash, judges whether the threshold with skin contact as wearable device
Value.
Step S205：The preset proportion FACTOR P is adjusted, according to formula skin capacitance threshold value=(C2-C1) × P
+ C1 recalculates the skin capacitance threshold value.
Preferably, it after in the flash that the skin capacitance threshold value is written to wearable device, further includes：Step
S206：The preset proportion FACTOR P is adjusted, is recalculated according to formula skin capacitance threshold value=(C2-C1) × P+C1
The skin capacitance threshold value.From life from the point of view of the different capacitance characteristics of various substances, preset proportion FACTOR P takes 0.5 to 0.6 left side
The right side is finely adjusted with this ratio value range and can reach calibration effect well.If the calibration of skin capacitance threshold value is ineffective, right
Preset proportion FACTOR P is adjusted, and recalculates skin capacitance threshold value, to improve the accuracy of detection.
Step S206：The skin capacitance threshold value recalculated is written in the flash of wearable device, to be set to wearable
Standby skin capacitance threshold value is calibrated.
In the flash of skin capacitance threshold value write-in wearable device recalculated, the skin being written before is replaced
Capacitance threshold value is calibrated again with the skin capacitance threshold value to wearable device.
The present embodiment utilizes capacitance characteristic of the capacitance detecting piece in different material, to the wearable device produced
Skin capacitance threshold value is calculated, using the skin capacitance threshold value that is calculated as calibration wearable device skin capacitance threshold value
Preset proportion FACTOR P is adjusted in basis, and the skin capacitance threshold value of wearable device is calibrated again, with determine can
The optimal skin capacitance threshold value of wearable device, as judge wearable device whether the threshold value with skin contact, effectively improve
Capacitance detecting piece detects the accuracy of skin, while reduces the requirement in production to technique, greatly reduces production cost.
It is the calibration system of a kind of wearable device skin capacitance threshold value provided in the specific embodiment of the invention below
Embodiment, the embodiment of the embodiment of system based on above-mentioned method realizes that not most description in systems please refers to aforementioned
The embodiment of method.
It please refers to Fig.3, is a kind of wearable device skin capacitance threshold value provided in the specific embodiment of the invention
The block diagram of the first embodiment of calibration system.As shown in the figure, the system, including：
Air capacitive detection module 31, for the back of wearable device to be placed in air, detection capacitance detecting piece
Capacitance C1.
Preferably, the wearable device includes：Smartwatch and intelligent wrist etc..
Copper sheet capacitive detection module 32 for the back of wearable device to be positioned over copper sheet, detects the capacitance inspection
Survey the capacitance C2 of piece.
Computing module 33, for being calculated skin capacitance threshold value, the skin capacitance threshold value=(C2-C1) × P+C1,
Wherein P is preset proportion coefficient, using wearable device skin capacitance threshold value of the skin capacitance threshold value as after calibrating.
Preferably, the value range of the preset proportion FACTOR P is 0.5-0.6.
In conclusion the present embodiment utilizes capacitance characteristic of the capacitance detecting piece in different material, it can to what is produced
The skin capacitance threshold value of wearable device is calculated, using the skin capacitance threshold value that is calculated as calibration after wearable device
Skin capacitance threshold value, with determine wearable device optimal skin capacitance threshold value, as judge wearable device whether with skin
The threshold value of skin contact, effectively improves the accuracy of capacitance detecting piece detection skin, while reduces the requirement in production to technique,
Greatly reduce production cost.
It please refers to Fig.4, is a kind of wearable device skin capacitance threshold value provided in the specific embodiment of the invention
The block diagram of the second embodiment of calibration system.As shown in the figure, the system, including：
Air capacitive detection module 41, for the back of wearable device to be placed in air, detection capacitance detecting piece
Capacitance C1.
Preferably, the wearable device includes：Smartwatch and intelligent wrist etc..
Copper sheet capacitive detection module 42 for the back of wearable device to be positioned over copper sheet, detects the capacitance inspection
Survey the capacitance C2 of piece.
Computing module 43, for being calculated skin capacitance threshold value, the skin capacitance threshold value=(C2-C1) × P+C1,
Wherein P is preset proportion coefficient, using wearable device skin capacitance threshold value of the skin capacitance threshold value as after calibrating.
Preferably, the value range of the preset proportion FACTOR P is 0.5-0.6.The preset proportion FACTOR P can be carried out
Setting to obtain the optimal skin capacitance threshold value of wearable device, improves the accuracy of capacitance detecting piece detection skin.
Writing module 44, for the skin capacitance threshold value to be written in the flash of wearable device, so that wearable set
It is standby that the skin capacitance threshold value is read out from flash in each booting, judge whether to connect with skin as wearable device
Tactile threshold value.
Preferably, the computing module 43 is additionally operable to：The preset proportion FACTOR P is adjusted, according to formula skin
Capacitance threshold value=(C2-C1) × P+C1 recalculates the skin capacitance threshold value.
If the calibration of skin capacitance threshold value is ineffective, preset proportion FACTOR P can be adjusted, recalculate skin pricktest
Hold threshold value, to improve the accuracy of detection.From life from the point of view of the different capacitance characteristics of various substances, preset proportion FACTOR P takes
0.5 to 0.6 or so, it is finely adjusted with this ratio value range and can reach calibration effect well.
Preferably, said write module 44, is additionally operable to：The skin capacitance threshold value write-in wearable device recalculated
In flash, calibrated with the skin capacitance threshold value to wearable device.
In the flash of skin capacitance threshold value write-in wearable device recalculated, the skin being written before is replaced
Capacitance threshold value is calibrated again with the skin capacitance threshold value to wearable device.
In conclusion calibration system the present embodiment of wearable device skin capacitance threshold value provided in this embodiment utilizes electricity
Hold capacitance characteristic of the detection lug in different material, the skin capacitance threshold value of the wearable device to producing calculates,
Wearable device skin capacitance threshold value after using the skin capacitance threshold value that is calculated as calibration, to preset proportion FACTOR P into
Row is adjusted, and the skin capacitance threshold value of wearable device is calibrated, to determine the optimal skin capacitance threshold of wearable device
Value, as judge wearable device whether the threshold value with skin contact, effectively improve capacitance detecting piece detect skin accuracy,
The requirement to technique in production is reduced simultaneously, greatly reduces production cost.
The technical principle of the present invention is described above in association with specific embodiment.These descriptions are intended merely to explain the present invention's
Principle, and it cannot be construed to limiting the scope of the invention in any way.Based on explanation herein, the technology of this field
Personnel would not require any inventive effort the other specific embodiments that can associate the present invention, these modes are fallen within
Within protection scope of the present invention.
Claims (10)
1. a kind of calibration method of wearable device skin capacitance threshold value, which is characterized in that including：
The back of wearable device is placed in air, detects the capacitance C1 of capacitance detecting piece；
The back of wearable device is positioned on copper sheet, detects the capacitance C2 of the capacitance detecting piece；
Skin capacitance threshold value, the skin capacitance threshold value=(C2-C1) × P+C1 is calculated, wherein P is preset proportion coefficient,
Wearable device skin capacitance threshold value after using the skin capacitance threshold value as calibration.
2. calibration method according to claim 1, which is characterized in that it is described to be calculated after skin capacitance threshold value, also
Including：By in the flash of skin capacitance threshold value write-in wearable device so that wearable device in each booting from
The skin capacitance threshold value is read out in flash, judges whether the threshold value with skin contact as wearable device.
3. calibration method according to claim 2, which is characterized in that described that skin capacitance threshold value write-in is wearable
After in the flash of equipment, further include：The preset proportion FACTOR P is adjusted, according to formula skin capacitance threshold value=
(C2-C1) × P+C1 recalculates the skin capacitance threshold value.
4. calibration method according to claim 3, which is characterized in that described according to formula skin capacitance threshold value=(C2-
C1 it after) × P+C1 recalculates the skin capacitance threshold value, further includes：The skin capacitance threshold value write-in recalculated can be worn
It wears in the flash of equipment, is calibrated with the skin capacitance threshold value to wearable device.
5. calibration method according to claim 1, which is characterized in that the value range of the preset proportion FACTOR P is
0.5-0.6。
6. a kind of calibration system of wearable device skin capacitance threshold value, which is characterized in that including：
Air capacitive detection module for the back of wearable device to be placed in air, detects the capacitance of capacitance detecting piece
C1；
Copper sheet capacitive detection module for the back of wearable device to be positioned over copper sheet, detects the capacitance detecting piece
Capacitance C2；
Computing module, for skin capacitance threshold value, the skin capacitance threshold value=(C2-C1) × P+C1 to be calculated, wherein P is
Preset proportion coefficient, using wearable device skin capacitance threshold value of the skin capacitance threshold value as after calibrating.
7. calibration system according to claim 6, which is characterized in that further include：
Writing module, for the skin capacitance threshold value to be written in the flash of wearable device, so that wearable device is every
The skin capacitance threshold value is read out during secondary booting from flash, judges whether the threshold with skin contact as wearable device
Value.
8. calibration system according to claim 7, which is characterized in that the computing module is additionally operable to：To the preset ratio
Example FACTOR P is adjusted, and the skin capacitance threshold value is recalculated according to formula skin capacitance threshold value=(C2-C1) × P+C1.
9. calibration system according to claim 8, which is characterized in that said write module is additionally operable to：What is recalculated
In the flash of skin capacitance threshold value write-in wearable device, calibrated with the skin capacitance threshold value to wearable device.
10. calibration system according to claim 6, which is characterized in that the value range of the preset proportion FACTOR P is
0.5-0.6。
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106249302A (en) * | 2016-08-12 | 2016-12-21 | 华为技术有限公司 | Wearable device and wearable device wear detection device |
| CN109508111A (en) * | 2018-09-29 | 2019-03-22 | 维沃移动通信有限公司 | A kind of touch event detection method and device |
| CN110132318A (en) * | 2019-04-30 | 2019-08-16 | 努比亚技术有限公司 | A kind of detection components and detection method of wrist machine wearing state |
| CN114485739B (en) * | 2021-12-27 | 2022-11-29 | 荣耀终端有限公司 | Parameter calibration method and wearable device |
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