CN103606717A - Anti-electric shock charging method and detection adapter with floating voltage detection function - Google Patents
Anti-electric shock charging method and detection adapter with floating voltage detection function Download PDFInfo
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- CN103606717A CN103606717A CN201310648795.2A CN201310648795A CN103606717A CN 103606717 A CN103606717 A CN 103606717A CN 201310648795 A CN201310648795 A CN 201310648795A CN 103606717 A CN103606717 A CN 103606717A
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- 238000000034 method Methods 0.000 title claims abstract description 14
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- 238000001914 filtration Methods 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 abstract description 7
- 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
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Abstract
The invention relates to an anti-electric shock charging method and a detection adapter with a floating voltage detection function. The method is floating voltage-based detection. During charging, the floating voltage between a charger output end and the ground is detected. When the floating voltage is greater than the safety voltage, the charger input is switched off. The detection adapter with a floating voltage detection function provided by the invention is used in cooperation with an existing user charger, can detect the floating voltage between the charger output end and the ground in real time, and can judge whether dangerous voltage exists. When charger electric leakage and other abnormal situations appear and dangerous voltage is generated, the charger input is switched off automatically to stop power supply, thereby avoiding electric shock accidents and protecting personal safety.
Description
Technical field:
The present invention relates to power supply, technical field of charger products, refer in particular to a kind of protection against electric shock charging method detecting based on suspended voltage and with the detection adapter of suspended voltage measuring ability.
Background technology:
The Charger (portable round) of the electronic products such as most smart mobile phones, digital product is all 2pin, and their " ground wire " is to be connected on product casing, and this is not ground wire truly, so between charger and the earth, just has suspended voltage.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 while using the electronic product charging, substantially do not have electric current to pass through human body, electric shock accidents can not occur.Yet under specific environment, suspended voltage is also detected more than human safety voltage over 36V even reaches 220V, so just exists undoubtedly potential safety hazard.At present, after a lot of USB output chargers, connecing device housings most of is metal shell, and charger is when giving equipment charge, if charger electric leakage or user's staff under wet environment touch metal shell, civil power, human body, between the earth, form loop, electric shock or Danger Electric shock risk just likely occur.And in actual life, also frequently have because using the products such as mobile phone that charging to be electrically shocked the even dead electric shock accidents that waits and occur.Yet there are not associated mechanisms or enterprise these to be taked to corresponding defensive measure always or do relevant improvement for product.
Summary of the invention:
One of object of the present invention is the above-mentioned weak point of prior art, and a kind of protection against electric shock charging method detecting based on suspended voltage is provided.
The technical solution used in the present invention is: a kind of protection against electric shock charging method, 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 2pin output plughole with the basic power supply circuits of master control circuit plate respectively, and at 3pin, exchange between input plug and 2pin output plughole and be also connected with a normal closing type relay, described normal closing type relay is also connected with the control circuit on master control circuit plate.
Particularly, 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, and the output of comparator connects control circuit.
Comparator in described suspended voltage testing circuit is also connected with reset switch.
On described master control circuit plate, be also provided with red led and the green indicating lamp being connected with control circuit.
The detection adapter that band suspended voltage of the present invention detects is to coordinate 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; can automatically cut off the input of charger; stop power supply, thereby avoid occurring electric shock accidents, protection personal safety.
Accompanying drawing explanation:
Fig. 1 is the principle of charging method of the present invention and with the structured flowchart of the detection adapter of 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 can realize safe charging by a kind of detection adapter with suspended voltage measuring ability.
Particularly, 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 (making suspended voltage testing circuit 123 carry out voltage detecting to the USB output port of user's charger 2) with described suspended voltage testing circuit 123, another branch end is connected (the electric energy of the USB output port of user's charger 2 is led to the adapter USB output port 14 detecting on adapter 1) with the adapter USB output port 14 of described detection adapter 1; Described 3pin exchanges input plug 11 and is connected with 2pin output plughole 13 with the basic power supply circuits 121 of master control circuit plate 12 respectively, and at 3pin, exchange between input plug 11 and 2pin output plughole 13 and be also connected with a normal closing type relay K1, described normal closing type relay K1 is also connected with the control circuit 122 on master control circuit plate 12; It is abnormal or while surpassing safe voltage that the USB output port voltage that user's charger 2 detected when suspended voltage testing circuit 123 has; suspended voltage testing circuit 123 sends signal opens control circuit 122 control normal closing type relay K1; cut off 3pin on detection adapter 1 and exchange the circuit between input plug 11 and 2pin output plughole 13; cut off the input of user's charger 2; adapter USB output port 14 outputs on the detection adapter 1 that makes the charger USB output port 22 of user's charger 2 and be attached thereto are zero, thereby guarantee user's personal safety.
In use, the 2pin input plug 21 of user's charger 2 is connected with the 2pin output port 13 that detects adapter 1, USB is detected to the USB plug of connecting line 15 and the charger USB output port 22 of user's charger 2 is connected, the USB plug of the USB charging wire of user's charger 2 autogamys is connected with the adapter USB output port 14 detecting on adapter 1, and the other end of the USB charging wire of user's charger 2 autogamys connects the electrical appliances such as mobile phone.
Particularly, described suspended voltage testing circuit 123 includes two bridge rectifier BD2/BD3, a filter circuit consisting of capacitor C 5 and resistance R 22, a voltage-stabiliser tube ZD1 and a comparator U2, wherein, an 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 the USB+ of suspended voltage over the ground and the USB-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, and the output of comparator U2 connects control circuit 122.
On described master control circuit plate 12, be also provided with red led and the green indicating lamp being connected with control circuit 122.Wherein, red led LED1 has when abnormal and lights voltage being detected, and reminding user charger is inputted in off-state; Green indicating lamp LED2 lights under normal circumstances at voltage, and reminding user charger, in normal connection status, can be used safely.
In conjunction with the circuit diagram shown in Fig. 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, not conducting of voltage-stabiliser tube ZD1, therefore comparator anode is without input, its output output low level, not conducting of now not conducting of diode D6, so control relay circuit, normal closing type relay K1 does not work, and basic charging circuit keeps conducting luminous to product charging and green indicating lamp LED1.
When there are abnormal conditions, for example, when as long as the suspended voltage over the ground of USB+/USB-has one to be greater than reference voltage (the safe voltage 36V in the present embodiment), the breakdown conducting of voltage-stabiliser tube ZD1, and the anode input of device U2 as a comparison, now, the input of comparator anode is inputted higher than negative terminal, the output OUT2 output high level of comparator, now diode D6 conducting, red led LED2 also conducting is luminous, green indicating lamp LED1 is extinguished by short circuit, and normal closing type relay K1 conducting action disconnect, then make basic charging circuit disconnect, 2pin output plughole L2/N2 stops output, no longer to 2 power supplies of user's charger, therefore not output of the USB output port of user's charger 2, just do not have the danger that electric shock occurs yet.
Comparator U2 in described suspended voltage testing circuit 123 is also connected with reset switch 16, after abnormal conditions are got rid of, press reset switch 16 and make comparator U2 output OUT2 and anode input short circuit, comparator U2 feeds back formation, because comparator U2 positive input voltage level is now lower than negative signal voltage level, comparator U2 reversion, output low level, control circuit 122 disconnects, and red LED lamp is extinguished, normal closing type relay K1 stops action and recovers normally off, thereby user can be recycled.
The detection adapter that band suspended voltage of the present invention detects is to coordinate 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; can automatically cut off the input of charger; stop power supply, thereby avoid occurring electric shock accidents, protection personal safety.
Claims (5)
1. a protection against electric shock charging method, is characterized in that: 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.
2. 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 2pin output plughole with the basic power supply circuits of master control circuit plate respectively, and at 3pin, exchange between input plug and 2pin output plughole and be also connected with a normal closing type relay, described normal closing type relay is also connected with the control circuit on master control circuit plate.
3. the detection adapter with suspended voltage measuring ability according to claim 2, 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, and the output of comparator connects control circuit.
4. the detection adapter with suspended voltage measuring ability according to claim 3, is characterized in that: the comparator in described suspended voltage testing circuit is also connected with reset switch.
5. the detection adapter with suspended voltage measuring ability according to claim 2, is characterized in that: on described master control circuit plate, be also provided with red led and the green indicating lamp being connected with control circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| 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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| 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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| CN103606717A true CN103606717A (en) | 2014-02-26 |
| CN103606717B CN103606717B (en) | 2015-10-07 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682500A (en) * | 2015-02-15 | 2015-06-03 | 庄景阳 | Radio wave signal induction charging power-off protection device |
| CN104682499A (en) * | 2015-02-15 | 2015-06-03 | 庄景阳 | Charging protection device with voltage induction power-off function |
| CN104682498A (en) * | 2015-02-15 | 2015-06-03 | 庄景阳 | Dual-mode mobile phone charging protection device |
| CN104682510A (en) * | 2015-02-15 | 2015-06-03 | 庄景阳 | Human body induction power interruption charging protection device |
| CN104682504A (en) * | 2015-02-15 | 2015-06-03 | 庄景阳 | 360-degrees mobile phone charging protector |
| 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 |
| CN104682507A (en) * | 2015-02-15 | 2015-06-03 | 庄景阳 | Motion-sensing dual-mode charging protecting device |
| CN104682509A (en) * | 2015-02-15 | 2015-06-03 | 庄景阳 | Slider mobile phone charging protection device |
| CN105445532A (en) * | 2014-09-10 | 2016-03-30 | 国网河南省电力公司平顶山供电公司 | Method for judging whether reactive compensation device lightning arrester is electrified |
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| CN102338838A (en) * | 2010-07-26 | 2012-02-01 | 英业达股份有限公司 | Creepage detection circuit |
| CN202888925U (en) * | 2012-10-25 | 2013-04-17 | 陆镇椿 | Charging protector for electric vehicle |
| CN103176093A (en) * | 2011-12-23 | 2013-06-26 | 海洋王照明科技股份有限公司 | Leakage detection circuit |
| 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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2013
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105445532A (en) * | 2014-09-10 | 2016-03-30 | 国网河南省电力公司平顶山供电公司 | Method for judging whether reactive compensation device lightning arrester is electrified |
| 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 |
| CN104682500A (en) * | 2015-02-15 | 2015-06-03 | 庄景阳 | Radio wave signal induction charging power-off protection device |
| CN104682499A (en) * | 2015-02-15 | 2015-06-03 | 庄景阳 | Charging protection device with voltage induction power-off function |
| CN104682498A (en) * | 2015-02-15 | 2015-06-03 | 庄景阳 | Dual-mode mobile phone charging protection device |
| CN104682510A (en) * | 2015-02-15 | 2015-06-03 | 庄景阳 | Human body induction power interruption charging protection device |
| CN104682504A (en) * | 2015-02-15 | 2015-06-03 | 庄景阳 | 360-degrees mobile phone charging protector |
| 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 |
| CN104682507A (en) * | 2015-02-15 | 2015-06-03 | 庄景阳 | Motion-sensing dual-mode charging protecting device |
| CN104682509A (en) * | 2015-02-15 | 2015-06-03 | 庄景阳 | Slider mobile phone charging protection device |
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| CN103606717B (en) | 2015-10-07 |
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