CN103606717B - The detection adapter of protection against electric shock charging method and band suspended voltage measuring ability - Google Patents
The detection adapter of protection against electric shock charging method and band suspended voltage measuring ability Download PDFInfo
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- CN103606717B CN103606717B CN201310648795.2A CN201310648795A CN103606717B CN 103606717 B CN103606717 B CN 103606717B CN 201310648795 A CN201310648795 A CN 201310648795A CN 103606717 B CN103606717 B CN 103606717B
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- 238000001514 detection method Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title abstract description 12
- 239000003381 stabilizer Substances 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 abstract description 5
- 206010014357 Electric shock Diseases 0.000 description 11
- 230000010165 autogamy Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
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- H02J7/0077—
Abstract
The present invention relates to the detection adapter of a kind of protection against electric shock charging method and band suspended voltage measuring ability.The method is the detection based on suspended voltage, when charging, detects the suspended voltage between charger output and the earth, when suspended voltage is greater than safe voltage, disconnects the input of charger.The detection adapter that band suspended voltage of the present invention detects coordinates existing user's charger to use; it can detect the suspended voltage between charger output and the earth in real time; and judge its whether dangerous voltage; when occurring that the abnormal conditions such as charger electric leakage produce dangerous voltage; automatically the input of charger can be cut off; stop power supply, thus avoid electric shock accidents occurs, protection personal safety.
Description
Technical field:
The present invention relates to power supply, technical field of charger products, refer in particular to the detection adapter of a kind of protection against electric shock charging method based on suspended voltage detection and band suspended voltage measuring ability.
Background technology:
The Charger (portable round) of most electronic product such as smart mobile phone, digital product is all 2pin, and their " ground wire " is connected on product casing, and this is not ground wire truly, therefore just there is suspended voltage between charger and the earth.In the ordinary course of things, suspended voltage is less, and due to the resistance approach infinity between charger (suspended voltage source) and the earth, so human body is at contact charging device or when using the electronic product charged, substantially there is no electric current by human body, electric shock accidents can not occur.But under particular circumstances, suspended voltage is also detected and even reaches more than 220V more than the human safety voltage of 36V, so just there is potential safety hazard undoubtedly.At present, a lot of USB connects device housings major part for metal shell after exporting charger, charger is when giving equipment charge, if charger electric leakage or user in wet condition human contact to metal shell, then civil power, human body, form loop between the earth, just likely electric shock or Danger Electric shock risk occur.And in actual life, also frequently have and be electrically shocked the even dead electric shock accidents that waits because using the products such as the mobile phone that charging and occur.But do not have associated mechanisms or enterprise these to be taked to corresponding defensive measure always or do relevant improvement for product.
Summary of the invention:
An object of the present invention is the above-mentioned weak point of prior art, provides a kind of protection against electric shock charging method detected based on suspended voltage.
The technical solution used in the present invention is: a kind of protection against electric shock charging method, and the method is the detection based on suspended voltage, when charging, detects the suspended voltage between charger output and the earth, when suspended voltage is greater than safe voltage, disconnects the input of charger.
Another object of the present invention is to provide a kind of detection adapter with suspended voltage measuring ability, to realize safe charging.
This detection adapter has 3pin and exchanges input plug, master control circuit plate, 2pin output plughole, USB output port and USB detection connecting line, and described master control circuit plate is provided with basic power supply circuits, control circuit and suspended voltage testing circuit; One end that described USB detects connecting line is USB plug, and the other end has two branch end, and one of them branch end is connected with described suspended voltage testing circuit, and another branch end is connected with described USB output port; Described 3pin exchanges input plug and is connected with the basic power supply circuits of master control circuit plate and 2pin output plughole respectively, and a normal closing type relay is also connected with between 3pin interchange input plug and 2pin output plughole, described normal closing type relay is also connected with the control circuit on master control circuit plate.
Specifically, described suspended voltage testing circuit includes two bridge rectifiers, a filter circuit, a voltage-stabiliser tube and a comparator, wherein, an input of each bridge rectifier connects its USB plug, another input end grounding by described USB detection connecting line; The output of each bridge rectifier is connected with the positive input terminal of comparator after circuit, voltage-stabiliser tube after filtering; The negative input end of comparator connects basic power supply circuits, the output connection control circuit of comparator.
Comparator in described suspended voltage testing circuit is also connected with reset switch.
Described master control circuit plate is also provided with the red led and green indicating lamp that are connected with control circuit.
The detection adapter that band suspended voltage of the present invention detects coordinates existing user's charger to use; it can detect the suspended voltage between charger output and the earth in real time; and judge its whether dangerous voltage; when occurring that the abnormal conditions such as charger electric leakage produce dangerous voltage; automatically the input of charger can be cut off; stop power supply, thus avoid electric shock accidents occurs, protection personal safety.
Accompanying drawing illustrates:
Fig. 1 is the structured flowchart of the principle of charging method of the present invention and the detection adapter of band suspended voltage measuring ability;
Fig. 2 is the internal circuit schematic diagram of the detection adapter of band suspended voltage measuring ability of the present invention.
Embodiment:
Below in conjunction with specific embodiments and the drawings, the present invention is further described.
As shown in Fig. 1 ~ Fig. 2, the secure charging method that the present invention discloses is the detection based on suspended voltage, when charging, detects the suspended voltage between charger output and the earth, when suspended voltage is greater than safe voltage, disconnects the input of charger.
Charging method of the present invention realizes safe charging by a kind of detection adapter with suspended voltage measuring ability.
Specifically, this detection adapter 1 has 3pin and exchanges input plug 11, master control circuit plate 12,2pin output plughole 13, adapter USB output port 14 and USB detection connecting line 15, and described master control circuit plate 12 is provided with basic power supply circuits 121, control circuit 122 and suspended voltage testing circuit 123; One end that described USB detects connecting line 15 is USB plug (being used for connecting the USB output port of user's charger 2), the other end has two branch end, one of them branch end is connected with described suspended voltage testing circuit 123 (making suspended voltage testing circuit 123 can carry out voltage detecting to the USB output port of user's charger 2), and another branch end is connected with the adapter USB output port 14 of described detection adapter 1 (leading the adapter USB output port 14 detected on adapter 1 with the electric energy of the USB output port by user's charger 2); Described 3pin exchanges input plug 11 and is connected with the basic power supply circuits 121 of master control circuit plate 12 and 2pin output plughole 13 respectively, and a normal closing type relay K1 is also connected with between 3pin interchange input plug 11 and 2pin output plughole 13, described normal closing type relay K1 is also connected with the control circuit 122 on master control circuit plate 12; Namely when suspended voltage testing circuit 123 detects that the USB output port voltage of user's charger 2 has exception or exceedes safe voltage; suspended voltage testing circuit 123 sends signal and makes control circuit 122 control normal closing type relay K1 to open; cut off the circuit detected on adapter 1 between 3pin interchange input plug 11 and 2pin output plughole 13; namely the input of user's charger 2 is cut off; adapter USB output port 14 on the charger USB output port 22 making user's charger 2 and the detection adapter 1 be attached thereto exports and is zero, thus ensures user's personal safety.
Namely in use, the 2pin input plug 21 of user's charger 2 is connected with the 2pin output port 13 detecting adapter 1, the charger USB output port 22 of the USB plug and user's charger 2 that USB are detected connecting line 15 is connected, the USB plug of the USB charging wire of user's charger 2 autogamy be connected with the adapter USB output port 14 detected on adapter 1, the other end of the USB charging wire of user's charger 2 autogamy connects the electrical appliances such as mobile phone.
Specifically, described suspended voltage testing circuit 123 includes two bridge rectifier BD2/BD3, a filter circuit be made up of electric capacity C5 and resistance R22, an a voltage-stabiliser tube ZD1 and comparator U2, wherein, one input of each bridge rectifier BD2/BD3 detects connecting line 15 by described USB and connects its USB plug, another input end grounding, to be connected with the charger USB output port 22 of user's charger 2 in use, record USB+ and USB-of suspended voltage over the ground of charger USB output port 22; The output of each bridge rectifier BD2/BD3 is connected with the positive input terminal of comparator U2 after circuit, voltage-stabiliser tube ZD1 after filtering; The negative input end of comparator U2 connects basic power supply circuits 121, the output connection control circuit 122 of comparator U2.
Described master control circuit plate 12 is also provided with the red led be connected with control circuit 122 and green indicating lamp.Wherein, red led LED1 lights when voltage has exception detecting, the input of reminding user charger is in off-state; Green indicating lamp LED2 lights under normal circumstances at voltage, and reminding user charger is in normal connection status, can use safely.
Circuit diagram shown in composition graphs 2, the specific works process that the present invention detects adapter is:
The suspended voltage over the ground of USB+/USB-connects voltage-stabiliser tube ZD1 after rectification, filtering, when the suspended voltage over the ground of USB+/USB-is all less than the voltage of the voltage-stabiliser tube ZD1 other end, voltage-stabiliser tube ZD1 not conducting, therefore comparator anode is without input, its output output low level, now diode D6 not conducting, therefore control relay circuit not conducting, normal closing type relay K1 does not work, and basic charging circuit keeps conducting to product charging and green indicating lamp LED1 is luminous.
When there are abnormal conditions, as long as when the suspended voltage over the ground of USB+/USB-has one to be greater than reference voltage (the safe voltage 36V in such as the present embodiment), the breakdown conducting of voltage-stabiliser tube ZD1, and input as the anode of comparator U2, now, the input of comparator anode inputs higher than negative terminal, the output OUT2 of comparator exports high level, now diode D6 conducting, red led LED2 also conducting is luminous, green indicating lamp LED1 is then shorted extinguishing, and normal closing type relay K1 conducting action disconnect, then basic charging circuit is made to disconnect, 2pin output plughole L2/N2 stops exporting, no longer power to user's charger 2, therefore the USB output port of user's charger 2 does not export, also the danger occurring to get an electric shock would not be had.
Comparator U2 in described suspended voltage testing circuit 123 is also connected with reset switch 16, after abnormal conditions are got rid of, pressing reset switch 16 makes comparator U2 output OUT2 and anode input short circuit, and comparator U2 feeds back formation, because now comparator U2 positive input voltage level is lower than negative signal voltage level, comparator U2 reverses, output low level, control circuit 122 disconnects, and red LED lamp is extinguished, normal closing type relay K1 stops action recovering normally off, thus user can be recycled.
The detection adapter that band suspended voltage of the present invention detects coordinates existing user's charger to use; it can detect the suspended voltage between charger output and the earth in real time; and judge its whether dangerous voltage; when occurring that the abnormal conditions such as charger electric leakage produce dangerous voltage; automatically the input of charger can be cut off; stop power supply, thus avoid electric shock accidents occurs, protection personal safety.
Claims (4)
1. the detection adapter with suspended voltage measuring ability, it is characterized in that: this detection adapter has 3pin and exchanges input plug, master control circuit plate, 2pin output plughole, USB output port and USB detection connecting line, and described master control circuit plate is provided with basic power supply circuits, control circuit and suspended voltage testing circuit; One end that described USB detects connecting line is USB plug, and the other end has two branch end, and one of them branch end is connected with described suspended voltage testing circuit, and another branch end is connected with described USB output port; Described 3pin exchanges input plug and is connected with the basic power supply circuits of master control circuit plate and 2pin output plughole respectively, and a normal closing type relay is also connected with between 3pin interchange input plug and 2pin output plughole, described normal closing type relay is also connected with the control circuit on master control circuit plate.
2. the detection adapter of band suspended voltage measuring ability according to claim 1, it is characterized in that: described suspended voltage testing circuit includes two bridge rectifiers, a filter circuit, a voltage-stabiliser tube and a comparator, wherein, one input of each bridge rectifier detects connecting line by described USB and connects its USB plug, another input end grounding; The output of each bridge rectifier is connected with the positive input terminal of comparator after circuit, voltage-stabiliser tube after filtering; The negative input end of comparator connects basic power supply circuits, the output connection control circuit of comparator.
3. the detection adapter of band suspended voltage measuring ability according to claim 2, is characterized in that: the comparator in described suspended voltage testing circuit is also connected with reset switch.
4. the detection adapter of band suspended voltage measuring ability according to claim 1, is characterized in that: described master control circuit plate is also provided with the red led and green indicating lamp that are connected with control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310648795.2A CN103606717B (en) | 2013-12-04 | 2013-12-04 | The detection adapter of protection against electric shock charging method and band suspended voltage measuring ability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310648795.2A CN103606717B (en) | 2013-12-04 | 2013-12-04 | The detection adapter of protection against electric shock charging method and band suspended voltage measuring ability |
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| Publication Number | Publication Date |
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| CN103606717A CN103606717A (en) | 2014-02-26 |
| CN103606717B true CN103606717B (en) | 2015-10-07 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105445532B (en) * | 2014-09-10 | 2018-02-13 | 国网河南省电力公司平顶山供电公司 | A kind of method for judging whether reactive power compensator arrester is powered |
| CN104682509A (en) * | 2015-02-15 | 2015-06-03 | 庄景阳 | Slider mobile phone charging protection device |
| CN104682498A (en) * | 2015-02-15 | 2015-06-03 | 庄景阳 | Dual-mode mobile phone charging protection device |
| CN104682500A (en) * | 2015-02-15 | 2015-06-03 | 庄景阳 | Radio wave signal induction charging power-off protection device |
| CN104682505A (en) * | 2015-02-15 | 2015-06-03 | 庄景阳 | Protection device for controlling angle shifting power interruption by virtue of rolling balls during charging of mobile phone |
| CN104682504A (en) * | 2015-02-15 | 2015-06-03 | 庄景阳 | 360-degrees mobile phone charging protector |
| CN104682507A (en) * | 2015-02-15 | 2015-06-03 | 庄景阳 | Motion-sensing dual-mode charging protecting device |
| CN104682510A (en) * | 2015-02-15 | 2015-06-03 | 庄景阳 | Human body induction power interruption charging protection device |
| CN104682499A (en) * | 2015-02-15 | 2015-06-03 | 庄景阳 | Charging protection device with voltage induction power-off function |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101179199A (en) * | 2007-11-08 | 2008-05-14 | 宇龙计算机通信科技(深圳)有限公司 | Terminal and charging method thereof |
| CN102338838A (en) * | 2010-07-26 | 2012-02-01 | 英业达股份有限公司 | Creepage detection circuit |
| CN103176093A (en) * | 2011-12-23 | 2013-06-26 | 海洋王照明科技股份有限公司 | Leakage detection circuit |
| CN202888925U (en) * | 2012-10-25 | 2013-04-17 | 陆镇椿 | Charging protector for electric vehicle |
| CN203596395U (en) * | 2013-12-04 | 2014-05-14 | 东莞市东颂电子有限公司 | Detection adaptor with suspension voltage detection function |
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