CN104360191B - Detection means and detection method that a kind of charger insertion is extracted - Google Patents
Detection means and detection method that a kind of charger insertion is extracted Download PDFInfo
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Abstract
The present invention discloses the detection means and detection method that a kind of charger insertion is extracted, wherein, detection means includes：Charging inlet, insertion interrupt detection unit, extract and interrupt detection unit, timer, voltage acquisition unit, insertion counter, extract counter and state determination unit；The present invention judges that charger is insertion or extraction state according to whether insertion counter and the count value extracted in counter are more than the 3rd threshold value CT.Can effectively it be removed when charger is plugged in the voltage dithering signal produced by VIN pins, the accurately and efficiently detection for realize charger insertion, extracting by the method for the present invention.
Description
Technical field
Application field, more particularly to the detection that a kind of insertion of charger is extracted are detected the present invention relates to Mobile terminal charger
Device and detection method.
Background technology
In the prior art, it is that the voltage on charging input pin is detected according to mobile terminal that charger, which inserts or pull out detection,
Change to realize.For example, think that charger is inserted when detecting the voltage on the pin higher than predetermined threshold value, work as detection
Voltage on to the pin thinks that charger is extracted when being less than predetermined threshold value.
However, but have more complicated situation in practical operation, for example, the action of user's plug charger is slightly slowly or slightly
It hurry up, can make to produce some voltage dithering signals on charging output pin, dither signal will make mobile terminal repeated detection to plug
Charger；For example, being an operation for acting slightly slow insertion charger for a user, mobile terminal is but because voltage
Dither signal detects charger extraction again at once after first detecting charger insertion, then detects charger insertion, so
Testing result is inaccurate, it is impossible to reflect actual conditions.
For such case, also have in the prior art by the method that power-up appearance is filtered at charging output pin,
But this method not only increases production cost, and effect is not satisfactory：Although electric capacity selects to filter more greatly very much
Shake but it can make normally plug detection and become slow in reacting, electric capacity selects too small then to filter that to shake effect poor；Hardware Engineer
Generally require to do substantial amounts of experiment, and this electric capacity is selected according to experimental data, so process is complicated, it has not been convenient to actual behaviour
Make.
Therefore, prior art has yet to be improved and developed.
The content of the invention
In view of above-mentioned the deficiencies in the prior art, it is an object of the invention to provide the detection dress that a kind of insertion of charger is extracted
Put and detection method, it is intended to solve that existing detection method is slow in reacting, effect is poor, process is complicated, inconvenient operation the problem of.
Technical scheme is as follows：
The detection means that a kind of charger insertion is extracted, wherein, including：Charging inlet, insertion interrupt detection unit, extracted
Interrupt detection unit, timer, voltage acquisition unit, insertion counter, extraction counter and state determination unit；
The charging inlet, including two be used for the pin that is connected with charger, described two pins are respectively that VIN draws
Pin and grounding pin, when charger is connected with charging inlet, VIN pins are used for input charging voltage and charging current；
Detection unit is interrupted in the insertion, for detecting whether VIN pins produce interruption；
Described extract interrupts detection unit, for detecting whether VIN pins produce interruption；
The timer, interrupts detection unit by insertion or extraction is interrupted when detection unit detects interruption and started, by shape
State identifying unit has judged to close after state；
Voltage acquisition unit, the charging voltage of the VIN pins for obtaining charging inlet；
Counter is inserted, when being more than first threshold VH for obtaining the charging voltage of VIN pins when voltage acquisition unit, is made
Insertion counter adds 1, extracts counter O reset；
Counter is extracted, when being less than Second Threshold VL for obtaining the charging voltage of VIN pins when voltage acquisition unit, is made
Extract counter and add 1, insert counter O reset；
Whether state determination unit, be more than the 3rd threshold value for the count value in insertion counter and extraction counter
CT judges that charger is insertion or extraction state.
The detection means that described charger insertion is extracted, wherein, the interruption that detection unit detection is interrupted in the insertion is
Level interrupt：Set and produce interrupt signal when charging voltage is more than VH at VIN pins；Described extract interrupts detection unit detection
Interrupt as level interrupt：Set and produce interrupt signal when charging voltage is less than VL at VIN pins.
The detection means that described charger insertion is extracted, wherein, the insertion, which is interrupted detection unit and extracted, interrupts inspection
Unit is surveyed, controls whether to enable by state determination unit.
The detection means that described charger insertion is extracted, wherein, the state determination unit decision state is：Work as insertion
When the count value of counter is more than CT, charger insertion is judged, then reset insertion counter and extract counter, timeing closing
Detection unit is interrupted in device, forbidden energy insertion, is enabled to extract and is interrupted detection unit；When the count value for extracting counter is more than CT, sentence
Determine charger extraction, then reset insertion counter, extract counter, Off Timer, forbidden energy, which is extracted, interrupts detection unit, makes
Can insertion interruption detection unit.
The detection means that described charger insertion is extracted, wherein, VH is more than VL.
The detection means that described charger insertion is extracted, wherein, CT is 20.
A kind of detection method for the detection means that charger insertion as described above is extracted, wherein, including step：
A, when insertion interrupt detection unit or extract interrupt detection unit detect interruption when, start timer；
B, judge whether timer is overtime, step C is performed if time-out, whether overtime timer is otherwise continued waiting for；
C, voltage acquisition unit obtain the charging voltage V0 of the VIN pins of charging inlet；
D, the relation for comparing V0 and VH and VL；
E, when V0 be more than VH when, then insertion counter plus 1, extract counter O reset；When V0 is less than VL, then meter is extracted
Number device adds 1, inserts counter O reset；
F, state determination unit judge charging according to whether the count value of insertion counter and extraction counter is more than CT
Device is insertion or extraction state.
Described detection method, wherein, when current state is that charger extracts state, methods described includes step：
A1, when insertion interrupt detection unit detect interruption when, forbidden energy insertion interrupt detection unit, start timer；
B1, judge whether timer is overtime, if then performing step C1, whether overtime otherwise continue waiting for timer；
C1, voltage acquisition unit obtain the charging voltage V0 of the VIN pins of charging inlet；
D1, the relation for comparing V0 and VH and VL, step E1 is performed if V0 is more than VH, if V0 is less than VL and performs step F1,
Other situations then perform step G1；
E1, insertion counter added 1, and counter O reset will be extracted, step H1 is performed afterwards；
F1, counter will be extracted add 1, and counter O reset will be inserted, step J1 is performed afterwards；
G1, counter O reset will be inserted, and counter O reset will be extracted, step B1 is performed afterwards；
H1, state determination unit judge whether the count value for inserting counter is more than CT, if then performing step I1, otherwise
Return to step B1；
I1, judgement charger insertion mobile terminal are simultaneously reported, and then reset insertion counter, are extracted counter, closing is fixed
When device, forbidden energy insertion interrupt detection unit, enable extract interrupt detection unit；
J1, state determination unit judge whether the count value for extracting counter is more than CT, if then performing K1, otherwise return
Step B1；
K1, judgement charger are extracted mobile terminal but not reported, and then reset insertion counter, extract counter, closing
Timer, forbidden energy, which is extracted, interrupts detection unit, enables insertion and interrupts detection unit.
Described detection method, wherein, when current state is charger insert state, methods described includes step：
A2, when extract interrupt detection unit detect interruption when, forbidden energy extract interrupt detection unit, start timer；
B2, judge whether timer is overtime, if then performing step C2, whether overtime otherwise continue waiting for timer；
C2, voltage acquisition unit obtain the charging voltage V0 of the VIN pins of charging inlet；
D2, the relation for comparing V0 and VH and VL, step E2 is performed if V0 is more than VH, if V0 is less than VL and performs step F2,
Other situations then perform step G2；
E2, insertion counter added 1, and counter O reset will be extracted, step H2 is performed afterwards；
F2, counter will be extracted add 1, and counter O reset will be inserted, step J2 is performed afterwards；
G2, counter O reset will be inserted, and counter O reset will be extracted, step B2 is performed afterwards；
H2, state determination unit judge whether the count value for inserting counter is more than CT, if then performing step I2, otherwise
Return to step B2；
I2, judgement charger insert mobile terminal but not reported, and then reset insertion counter, extract counter, closing
Detection unit is interrupted in timer, forbidden energy insertion, is enabled to extract and is interrupted detection unit；
J2, state determination unit judge whether the count value for extracting counter is more than CT, if then performing K2, otherwise return
Step B2；
K2, judgement charger are extracted mobile terminal and reported, and then reset insertion counter, extract counter, closing is fixed
When device, forbidden energy extract interrupt detection unit, enable insertion interrupt detection unit.
Beneficial effect：The present invention by insertion counter and extract counter count, then according to count value come
It is insertion or extraction state to judge charger, can effectively be removed when charger is plugged and drawn in VIN by the method for the present invention
Voltage dithering signal produced by pin, the accurately and efficiently detection for realize charger insertion, extracting.
Brief description of the drawings
The structured flowchart for the detection means preferred embodiment that Fig. 1 extracts for a kind of charger insertion of the invention.
The method flow diagram for the detection method first embodiment that Fig. 2 extracts for a kind of charger insertion of the invention.
The method flow diagram for the detection method second embodiment that Fig. 3 extracts for a kind of charger insertion of the invention.
The method flow diagram for the detection method 3rd embodiment that Fig. 4 extracts for a kind of charger insertion of the invention.
Embodiment
The present invention provides the detection means and detection method that a kind of charger insertion is extracted, to make the purpose of the present invention, skill
Art scheme and effect are clearer, clear and definite, and the present invention is described in more detail below.It should be appreciated that tool described herein
Body embodiment only to explain the present invention, is not intended to limit the present invention.
Referring to Fig. 1, the structural frames for the detection means preferred embodiment that Fig. 1 extracts for a kind of charger insertion of the invention
Figure, as illustrated, it includes：Charging inlet 10, insertion interrupt detection unit 20, extract interrupt detection unit 30, timer 40,
Voltage acquisition unit 50, insertion counter 60, extraction counter 70 and state determination unit 80；
The charging inlet 10, including two be used for the pin that is connected with charger, described two pins are respectively VIN
Pin and grounding pin, VIN pins are charging input pin, and when charger is connected with charging inlet 10, VIN pins are used for
Input charging voltage and charging current；
Detection unit 20 is interrupted in the insertion, for detecting whether VIN pins produce interruption；It is single that detection is interrupted in the insertion
The interruption of the detection of member 20 is level interrupt：Set when charging voltage is more than first threshold VH at VIN pins and produce interrupt signal.
The insertion interrupts detection unit 20 and is controlled whether to enable by state determination unit 80.
Described extract interrupts detection unit 30, for detecting whether VIN pins produce interruption；Described extract interrupts detection list
The interruption of the detection of member 30 is level interrupt：Set when charging voltage is less than Second Threshold VL at VIN pins and produce interrupt signal.
The interruption detection unit 30 of extracting is controlled whether to enable by state determination unit 80.
The timer 40, is interrupted detection unit 20 or is extracted to interrupt when detection unit 30 detects interruption and opened by insertion
It is dynamic, judged to close after state by state determination unit 80；After timer 40 starts, every 10 milliseconds of trigger voltage acquiring units
50 obtain the charging voltage of VIN pins.
Voltage acquisition unit 50, the charging voltage of the VIN pins for obtaining charging inlet 10；
Counter 60 is inserted, the charging voltage for obtaining VIN pins when voltage acquisition unit 50 is more than first threshold VH
When, insertion counter 60 plus 1, extract counter 70 and reset；
Counter 70 is extracted, the charging voltage for obtaining VIN pins when voltage acquisition unit 50 is less than Second Threshold VL
When, extraction counter 70 plus 1, insertion counter 60 is reset；
State determination unit 80, for according to insertion counter 60 and extracting whether the count value in counter 70 is more than the
Three threshold value CT judge that charger is insertion or extraction state.
The decision state of state determination unit 80 is：When the count value for inserting counter 60 is more than CT, charging is judged
Device is inserted, and is then reset insertion counter 60 and is extracted counter 70, detection unit is interrupted in Off Timer 40, forbidden energy insertion
20, enable to extract and interrupt detection unit 30；When the count value for extracting counter 70 is more than CT, judge that charger is extracted, then
Reset insertion counter 60, extract counter 70, Off Timer 40, forbidden energy, which is extracted, interrupts detection unit 30, enables in insertion
Disconnected detection unit 20.
Wherein, VH is more than VL.For example, VH is 4V, VL is 1V.
Further, CT is 20.That is when the count value of insertion counter is more than 20, then charger insertion is judged, or extract
When the count value of counter is more than 20, then judge that charger is extracted, this method is filled when can more effectively remove charger plug
Voltage dithering signal produced by electric input pin, ensures that the testing result finally obtained is more accurate by multiple stored count
Really.
Based on the above method, the present invention also provides a kind of detection for the detection means that charger insertion as described above is extracted
Method, as shown in Fig. 2 it includes step：
S1, when insertion interrupt detection unit or extract interrupt detection unit detect interruption when, start timer；
S2, judge whether timer is overtime, step S3 is performed if time-out, whether overtime timer is otherwise continued waiting for；
S3, voltage acquisition unit obtain the charging voltage V0 of the VIN pins of charging inlet；
S4, the relation for comparing V0 and VH and VL；
S5, when V0 be more than VH when, then insertion counter plus 1, extract counter O reset；When V0 is less than VL, then extract
Counter adds 1, inserts counter O reset；
S6, state determination unit judge charging according to whether the count value of insertion counter and extraction counter is more than CT
Device is insertion or extraction state.
By the above method, it can be compared according to the count value of insertion counter and extraction counter with CT, judge tired
Whether the count value of meter meets threshold requirement, so as to judge insertion or extraction, this is avoided because of voltage dithering signal
The error detection of generation, slows up while will not also make normally to plug detection, good filtration effect of the invention, and detection efficiency
It is high.
Specifically, when current state is that charger extracts state, as shown in figure 3, methods described includes step：
S101, when insertion interrupt detection unit detect interruption when, forbidden energy insertion interrupt detection unit, start timer；
S102, judge whether timer is overtime, if then performing step S103, otherwise continue waiting for whether timer surpasses
When；
S103, voltage acquisition unit obtain the charging voltage V0 of the VIN pins of charging inlet；
S104, the magnitude relationship for judging V0 and VH and VL, step S105 is performed if V0 is more than VH, if V0 is performed less than VL
Step S106, other situations then perform step S107；Wherein, VH is more than VL, and other situations include V0 and are less than or equal to VH and are more than
Equal to VL.
S105, insertion counter added 1, and counter O reset will be extracted, step S108 is performed afterwards；
S106, counter will be extracted add 1, and counter O reset will be inserted, step S110 is performed afterwards；
S107, counter O reset will be inserted, and counter O reset will be extracted, step S102 is performed afterwards；
S108, state determination unit judge whether the count value for inserting counter is more than CT, if then performing step S109,
Otherwise return to step S102；
S109, judgement charger insertion mobile terminal are simultaneously reported, and then reset insertion counter, are extracted counter, closing
Detection unit is interrupted in timer, forbidden energy insertion, is enabled to extract and is interrupted detection unit；
S110, state determination unit judge whether the count value for extracting counter is more than CT, if then performing S111, otherwise
Return to step S102；
S111, judgement charger are extracted mobile terminal but not reported, and then reset insertion counter, extract counter, pass
Timer is closed, forbidden energy, which is extracted, interrupts detection unit, enables insertion and interrupts detection unit.
Specifically, when current state is charger insert state, as shown in figure 4, methods described includes step：
S201, when extract interrupt detection unit detect interruption when, forbidden energy extract interrupt detection unit, start timer；
S202, judge whether timer is overtime, if then performing step C2, whether overtime otherwise continue waiting for timer；
S203, voltage acquisition unit obtain the charging voltage V0 of the VIN pins of charging inlet；
S204, the magnitude relationship for judging V0 and VH and VL, step S205 is performed if V0 is more than VH, if V0 is performed less than VL
Step S206, other situations then perform step S207；
S205, insertion counter added 1, and counter O reset will be extracted, step S208 is performed afterwards；
S206, counter will be extracted add 1, and counter O reset will be inserted, step S210 is performed afterwards；
S207, counter O reset will be inserted, and counter O reset will be extracted, step S202 is performed afterwards；
S208, state determination unit judge whether the count value for inserting counter is more than CT, if then performing step S209,
Otherwise return to step S202；
S209, judgement charger insert mobile terminal but not reported, and then reset insertion counter, extract counter, pass
Timer is closed, detection unit is interrupted in forbidden energy insertion, enable to extract and interrupt detection unit；
S210, state determination unit judge whether the count value for extracting counter is more than CT, if then performing S211, otherwise
Return to step S202；
S211, judgement charger are extracted mobile terminal and reported, and then reset insertion counter, extract counter, closing
Timer, forbidden energy, which is extracted, interrupts detection unit, enables insertion and interrupts detection unit.
In summary, the present invention by insertion counter and extract counter count, then according to count value come
It is insertion or extraction state to judge charger, can effectively be removed when charger is plugged and drawn in VIN by the method for the present invention
Voltage dithering signal produced by pin, the accurately and efficiently detection for realize charger insertion, extracting.
It should be appreciated that the application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can
To be improved or converted according to the above description, all these modifications and variations should all belong to the guarantor of appended claims of the present invention
Protect scope.
Claims (8)
1. the detection means that a kind of charger insertion is extracted, it is characterised in that including：Charging inlet, insertion interrupt detection unit,
Extract and interrupt detection unit, timer, voltage acquisition unit, insertion counter, extraction counter and state determination unit；
The charging inlet, including two be used for the pin that is connected with charger, described two pins be respectively VIN pins and
Grounding pin, when charger is connected with charging inlet, VIN pins are used for input charging voltage and charging current；
Detection unit is interrupted in the insertion, for detecting whether VIN pins produce interruption；
Described extract interrupts detection unit, for detecting whether VIN pins produce interruption；
The timer, interrupts detection unit by insertion or extraction is interrupted when detection unit detects interruption and started, sentenced by state
Order member has judged to close after state；
Voltage acquisition unit, the charging voltage of the VIN pins for obtaining charging inlet；
Counter is inserted, when being more than first threshold VH for obtaining the charging voltage of VIN pins when voltage acquisition unit, makes insertion
Counter adds 1, extracts counter O reset；
Counter is extracted, when being less than Second Threshold VL for obtaining the charging voltage of VIN pins when voltage acquisition unit, makes extraction
Counter adds 1, inserts counter O reset；
State determination unit, for according to insertion counter and extract counter in count value whether be more than the 3rd threshold value CT come
Judge that charger is insertion or extraction state;
The interruption that detection unit detection is interrupted in the insertion is level interrupt：Set and produced when charging voltage is more than VH at VIN pins
Raw interrupt signal；The interruption for extracting interruption detection unit detection is level interrupt：Charging voltage at VIN pins is set to be less than
Interrupt signal is produced during VL.
2. the detection means that charger insertion according to claim 1 is extracted, it is characterised in that detection is interrupted in the insertion
Detection unit is interrupted in unit and extraction, controls whether to enable by state determination unit.
3. the detection means that charger insertion according to claim 2 is extracted, it is characterised in that the state determination unit
Decision state is：When the count value for inserting counter is more than CT, judges charger insertion, then reset insertion counter and pull out
Go out counter, detection unit is interrupted in Off Timer, forbidden energy insertion, enable to extract and interrupt detection unit；When extraction counter
When count value is more than CT, judge that charger is extracted, then reset insertion counter, extract counter, Off Timer, forbidden energy is pulled out
Go out and interrupt detection unit, enable insertion and interrupt detection unit.
4. the detection means that charger insertion according to claim 1 is extracted, it is characterised in that VH is more than VL.
5. the detection means that charger insertion according to claim 1 is extracted, it is characterised in that CT is 20.
6. a kind of detection method for the detection means that charger insertion as claimed in claim 1 is extracted, it is characterised in that including
Step：
A, when insertion interrupt detection unit or extract interrupt detection unit detect interruption when, start timer；
B, judge whether timer is overtime, step C is performed if time-out, whether overtime timer is otherwise continued waiting for；
C, voltage acquisition unit obtain the charging voltage V0 of the VIN pins of charging inlet；
D, the relation for comparing V0 and VH and VL；
E, when V0 be more than VH when, then insertion counter plus 1, extract counter O reset；When V0 is less than VL, then counter is extracted
Plus 1, insert counter O reset；
F, state determination unit are to judge charger according to whether the count value of insertion counter and extraction counter is more than CT
Insertion or extraction state.
7. detection method according to claim 6, it is characterised in that when current state is that charger extracts state, institute
Stating method includes step：
A1, when insertion interrupt detection unit detect interruption when, forbidden energy insertion interrupt detection unit, start timer；
B1, judge whether timer is overtime, if then performing step C1, whether overtime otherwise continue waiting for timer；
C1, voltage acquisition unit obtain the charging voltage V0 of the VIN pins of charging inlet；
D1, the relation for comparing V0 and VH and VL, step E1 is performed if V0 is more than VH, if V0 is less than VL and performs step F1, other
Situation then performs step G1；
E1, insertion counter added 1, and counter O reset will be extracted, step H1 is performed afterwards；
F1, counter will be extracted add 1, and counter O reset will be inserted, step J1 is performed afterwards；
G1, counter O reset will be inserted, and counter O reset will be extracted, step B1 is performed afterwards；
H1, state determination unit judge whether the count value for inserting counter is more than CT, if then performing step I1, otherwise return
Step B1；
I1, judgement charger insertion mobile terminal are simultaneously reported, and then reset insertion counter, are extracted counter, Off Timer,
Detection unit is interrupted in forbidden energy insertion, is enabled to extract and is interrupted detection unit；
J1, state determination unit judge whether the count value for extracting counter is more than CT, if then performing K1, otherwise return to step
B1；
K1, judgement charger are extracted mobile terminal but not reported, and then reset insertion counter, extract counter, timeing closing
Device, forbidden energy, which is extracted, interrupts detection unit, enables insertion and interrupts detection unit.
8. detection method according to claim 6, it is characterised in that when current state is charger insert state, institute
Stating method includes step：
A2, when extract interrupt detection unit detect interruption when, forbidden energy extract interrupt detection unit, start timer；
B2, judge whether timer is overtime, if then performing step C2, whether overtime otherwise continue waiting for timer；
C2, voltage acquisition unit obtain the charging voltage V0 of the VIN pins of charging inlet；
D2, the relation for comparing V0 and VH and VL, step E2 is performed if V0 is more than VH, if V0 is less than VL and performs step F2, other
Situation then performs step G2；
E2, insertion counter added 1, and counter O reset will be extracted, step H2 is performed afterwards；
F2, counter will be extracted add 1, and counter O reset will be inserted, step J2 is performed afterwards；
G2, counter O reset will be inserted, and counter O reset will be extracted, step B2 is performed afterwards；
H2, state determination unit judge whether the count value for inserting counter is more than CT, if then performing step I2, otherwise return
Step B2；
I2, judgement charger insert mobile terminal but not reported, and then reset insertion counter, extract counter, timeing closing
Detection unit is interrupted in device, forbidden energy insertion, is enabled to extract and is interrupted detection unit；
J2, state determination unit judge whether the count value for extracting counter is more than CT, if then performing K2, otherwise return to step
B2；
K2, judgement charger are extracted mobile terminal and reported, and then reset insertion counter, extract counter, Off Timer,
Forbidden energy, which is extracted, interrupts detection unit, enables insertion and interrupts detection unit.
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| CN104836290B (en) * | 2015-05-07 | 2017-11-10 | 惠州Tcl移动通信有限公司 | The detection method and detecting system that a kind of Mobile terminal charger insertion is extracted |
| CN106019170B (en) * | 2016-05-18 | 2019-04-09 | Oppo广东移动通信有限公司 | A kind of power supply adaptor detection device |
| CN106532848B (en) * | 2016-12-14 | 2020-09-22 | 惠州Tcl移动通信有限公司 | Charger detection opportunity acquisition control method and system based on mobile terminal |
| CN107317061A (en) * | 2017-05-27 | 2017-11-03 | 北京新能源汽车股份有限公司 | Power battery management method, system and automobile |
| CN109950939B (en) * | 2017-12-20 | 2021-09-24 | 炬芯科技股份有限公司 | Charger state detection circuit, device circuit, and charger state detection method |
| DE102018201159A1 (en) * | 2018-01-25 | 2019-07-25 | Robert Bosch Gmbh | Hand tool |
| CN108391261B (en) * | 2018-02-28 | 2021-11-23 | 惠州Tcl移动通信有限公司 | Bluetooth search detection method, detection device, storage medium and mobile terminal |
| CN110441623A (en) * | 2018-05-04 | 2019-11-12 | 神讯电脑(昆山)有限公司 | Onboard charger plug-pull detecting circuit |
| CN114116546A (en) * | 2021-11-19 | 2022-03-01 | Oppo广东移动通信有限公司 | Device unplugging reporting method and device, computer readable medium and electronic device |
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| CN104360191A (en) | 2015-02-18 |
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