CN106533242A - Intelligent strong and weak current safe conversion apparatus and safe conversion method therefor - Google Patents
Intelligent strong and weak current safe conversion apparatus and safe conversion method therefor Download PDFInfo
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- CN106533242A CN106533242A CN201710015976.XA CN201710015976A CN106533242A CN 106533242 A CN106533242 A CN 106533242A CN 201710015976 A CN201710015976 A CN 201710015976A CN 106533242 A CN106533242 A CN 106533242A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
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Abstract
The invention relates to an intelligent strong and weak current safe conversion apparatus, and solves the shortcomings in the prior art. A technical scheme is adopted as follows: the intelligent strong and weak current safe conversion apparatus comprises a switch power supply circuit, a control module, a load determining circuit, a switching circuit and a weak current detection circuit, wherein the input end of the switch power supply circuit is connected with the mains supply; the weak current output end of the switch power supply circuit is connected with the weak current input end of the switching circuit; the control module is powered by the switch power supply circuit, connected with the output end of the load determining circuit, and connected with the control end of the switching circuit; the detection input end of the load determining circuit is connected with the mains supply; the detection output end of the load determining circuit is connected with the strong current input end of the switching circuit; the output end of the load determining circuit is connected with the control module; the control end of the switching circuit is connected with the control module; the weak current input end of the switching circuit is connected with the output end of the switch power supply circuit; the strong current input end of the switching circuit is connected with the detection output end of the load determining circuit; the grounding end of the switching circuit is connected with the weak current detection circuit; and the neutral earthing end of the switching circuit is connected with a null line of the mains supply.
Description
Technical field
The present invention is a kind of safe voltage conversion equipment, more particularly to a kind of intelligent strong and weak electricity safety switching device and its
Safe conversion method.
Background technology
Socket at present commercially, switch are directly connected on above the forceful electric power of civil power, and various countries' standard is different, substantially divides
For 110VAC or so and 220VAC or so, they are applied in all occasions for having electricity, sometimes very dangerous, such as：Family
When having child in front yard etc., after human body imprudence is touched, it may be possible to fatal threat.So if releasing intelligence
Strong, weak electricity conversion equipment, whether energy automatic decision has really is supported on above loop, if resistive load, even compare
Faint load, such as：0.5W, can open forceful electric power, if Switching Power Supply, the capacitive load of resistance-capacitance depressurization class, also can intelligence
Forceful electric power can be opened after determining, if do not loaded, human safety voltage can be switched to, typically conventional 24V or 12V most insures,
It is ensured that human body Long Term Contact does not have any problem.Tool understands, and does not also have real intelligent decision and control at present on the market
Forceful electric power（Civil power 110VAC and 220VAC is the more commonly used）With light current（Safe voltage is below 36V）Voltage between converting means
Put, including safety socket on the market, be all from structure ensureing not touch copper sheet, but copper sheet itself or band forceful electric power
, it is not real safety, simply plays a part of isolation, if isolation is bad, still can causes human electric shock.
The content of the invention
The purpose of the present invention is that also do not have real intelligence to sentence on the market at present for solving to exist in current technology scheme
Disconnected and control forceful electric power（Civil power 110VAC and 220VAC is the more commonly used）With light current（Safe voltage is below 36V）Voltage between
Conversion equipment, including safety socket on the market, be all from structure ensureing not touch copper sheet, but copper sheet itself is still
With forceful electric power, it is not real safety, simply plays a part of isolation, if isolation is bad, still can causes human electric shock
Problem, this invention provides a kind of intelligent strong and weak electricity safety switching device.
The technical solution adopted for the present invention to solve the technical problems is：A kind of intelligent strong and weak electricity safety switching device, by
Mains-supplied, including：
Switching power circuit, switching power circuit input are electrically connected with city, the light current outfan of switching power circuit and switching
The light current input connection of circuit；
Control module, is powered by switching power circuit, is connected with the outfan of load judgment circuit, the control end with switching circuit
Connection；
Load judgment circuit, the detection input of load judgment circuit are electrically connected with city, the detection output of load judgment circuit
It is connected with the forceful electric power input of switching circuit, load judgment circuit output end is connected with control module；
Switching circuit, the control end of switching circuit are connected with control module, the light current input of switching circuit and switch power supply
The outfan connection on road, the forceful electric power input of switching circuit are connected with the detection output of load judgment circuit, switching circuit
Earth terminal is connected with weak electricity measuring circuit, and the connecting to neutral end of switching circuit is connected with civil power zero line；
Weak electricity measuring circuit：The earth terminal of weak electricity measuring circuit is connected with the earth terminal of switching circuit, the control of weak electricity measuring circuit
End processed is connected with control module.The present invention by according to load difference, intelligent decision short circuit, open circuit, human contact, it is resistive bear
Load, capacitive load etc., perfectly solve socket, switch etc. using the unsafe problem of class occasion, have filled up the vacuum in market
Demand, it will produce huge economical, societal benefits.
Preferably, the load judgment circuit includes：
Current transformer ZT1, diode D3, diode D4, amplifier U3A, resistance R14, resistance R17 and electric capacity C21, electric current are mutual
The 4th Duan Yu cities electrical connection of sensor ZT1, the 3rd end of current transformer ZT1 are connected with the forceful electric power input of switching circuit, electricity
The negative input end of the first end of current transformer ZT1 anode, the negative electrode of diode D4 and amplifier U3A respectively with diode D3
Connection, second end of current transformer ZT1 anode respectively with diode D4, the negative electrode of diode D3 and amplifier U3A's
Positive input terminal connects, the plus earth of diode D4, and the negative electrode of diode D4 passes through the outfan of resistance R14 and amplifier U3A
Connection, the outfan of amplifier U3A are connected with the first end of resistance R17, and second end of resistance R17 is connected with control module, electricity
Second end of resistance R17 is grounded by electric capacity C21.
Preferably, the switching circuit includes：Audion Q1, audion Q2, resistive load R20, resistance R18, resistance
R19, resistance R25 and capacitive load C23, diode D5, diode D6, relay RY1, socket ACL2, socket ACN2, relay
RY1 includes relay coil and double-point double-throw switch, and switching circuit is also connected with the control power end of switching power circuit,
The emitter stage of audion Q2 is connected with the light current outfan of switching power circuit, emitter stage and the audion Q2 of audion Q2
Base stage between connected by resistance R25, the base stage of audion Q2 is connected with control module connector, audion Q2's
Colelctor electrode is connected with the first normally-closed contact of double-point double-throw switch；
First normally opened contact of double-point double-throw switch and the three-terminal link of current transformer ZT1, the second of double-point double-throw switch
Normally opened contact is connected with civil power zero line；
The negative electrode of diode D5 is connected with the light current outfan of switching power circuit, the anode of diode D5 and the collection of audion Q1
Electrode connects, and the negative electrode of diode D5 is connected with the anode of diode D5 by relay coil, and the emitter stage of audion Q1 connects
Ground, the base stage of audion Q1 are connected with a connector of control module by resistance R18, and the base stage of audion Q1 passes through resistance
R19 is connected with the emitter stage of audion Q1；
First movable contact of double-point double-throw switch is connected with socket ACL2, the second movable contact and the socket ACN2 of double-point double-throw switch
Connection, socket ACL2 are connected with socket ACN2 by resistive load R20, and socket ACL2 also passes through capacitive load C23 and socket
ACN2 connects.
Preferably, the weak electricity measuring circuit include resistance R21, resistance R22, resistance R26, resistance R24, resistance R23,
The first end of diode D6 and electric capacity C22, resistance R21 is connected with second end of resistance R22, and the first end of resistance R22 is by electricity
Resistance R23 ground connection, the first end of resistance R24 are connected with the first end of resistance R22, and second end of resistance R24 is connect by electric capacity C22
Ground, second end of resistance R24 are connected with the anode of diode D6, and the negative electrode of diode D6 is connected with control power end, diode
The anode of D6 is connected with control module connector, and second end of resistance R21 passes through one of resistance R26 and control module
Connector connects, and second end of resistance R21 is connected with the second normally-closed contact of double-point double-throw switch.
Preferably, the control module is to include two analog digital conversion AD mouths, an input port and two delivery outlets
Single-chip microcomputer.
A kind of safe conversion method of intelligent strong and weak electricity, it is adaptable to intelligence strong and weak electricity safety switching device as above,
Load judgment circuit judges situation about loading in forceful electric power work, has sensed no current by current transformer ZT1, and
Amplify through amplifier U3A and be converted into voltage so that the voltage for detecting enters an analog digital conversion AD mouth of control module
MCU-AD1 judges to be currently operating in underloading, heavy duty or no-load condition；
Switching circuit judged loadtype and switched the output of forceful electric power or light current by relay RY1, when electricity on control device or
When being converted into light current from forceful electric power, the control mouth MCU-IO1 output low level of control module, audion Q1 disconnect, relay RY1 works
Make in normally-closed contact, now start to judge that load is resistive load, capacitive load or zero load；
The determination methods of resistive load：
In 1 second, safe voltage has directly been connected to socket by audion Q2 by the control audion Q2 conductings of control unit MCU
On ACL2, if there is resistive load outside, then the current loop of safe voltage will be connected to socket by resistive load R20
ACN2, then by resistance R21, R22 and the partial pressure of resistance R23, obtains the magnitude of voltage of resistive load, by current-limiting resistance R24
It is connected in control module, different voltages is obtained according to the size of resistive load, MCU is so as to judging it is short circuit, open circuit or people
Body is contacted, if short circuit or human contact's situation would not switch to forceful electric power, has carried out the protection of safety；
The determination methods of capacitive load：
As judged within 1 second without resistive load above, the delivery outlet MCU-IO2 level that can arrange control module at lower 1 second is that pulse is defeated
Go out, the voltage of an alternation will be produced, capacitive load electric capacity C23 there will be electric current to pass through, so as to form loop, now electric current will be logical
Cross resistance R26 and be connected to control module, directly determine whether voltage to determine whether capacitive load；
Unloaded determination methods：
Resistive load was judged above by 1 second, the another method for judging capacitive load in 1 second draws the presence for whether having real load,
If both above load is all judged as NO, then be exactly unloaded；
According to above-mentioned judgement, if resistive or capacitive load, control module drives audion Q1 conductings, relay RY1 works
Make in normally opened contact, accessory power outlet ACL2 and ACN2 switches to forceful electric power to export.
The present invention substantial effect be：Difference according to load, intelligent decision short circuit, open circuit, human body are connect by the present invention
Tactile, resistive load, capacitive load etc., perfectly solve socket, switch etc. using the unsafe problem of class occasion, have filled up city
The vacuum requirement of field, it will produce huge economical, societal benefits.
Description of the drawings
Fig. 1 is the circuit theory diagrams of control module in the present invention；
Fig. 2 is the circuit theory diagrams of breaker in middle power circuit of the present invention；
Fig. 3 is the circuit theory diagrams of load judgment circuit in the present invention；
Fig. 4 is the circuit theory diagrams of switching circuit in the present invention.
Specific embodiment
Below by specific embodiment, and accompanying drawing is combined, technical scheme is described in further detail.
Embodiment：
A kind of intelligent strong and weak electricity safety switching device（Referring to accompanying drawing 1 to accompanying drawing 4）, by mains-supplied, including：
Switching power circuit, switching power circuit input are electrically connected with city, the light current outfan of switching power circuit and switching
The light current input connection of circuit；
Control module, is powered by switching power circuit, is connected with the outfan of load judgment circuit, the control end with switching circuit
Connection；
Load judgment circuit, the detection input of load judgment circuit are electrically connected with city, the detection output of load judgment circuit
It is connected with the forceful electric power input of switching circuit, load judgment circuit output end is connected with control module；
Switching circuit, the control end of switching circuit are connected with control module, the light current input of switching circuit and switch power supply
The outfan connection on road, the forceful electric power input of switching circuit are connected with the detection output of load judgment circuit, switching circuit
Earth terminal is connected with weak electricity measuring circuit, and the connecting to neutral end of switching circuit is connected with civil power zero line；
Weak electricity measuring circuit：The earth terminal of weak electricity measuring circuit is connected with the earth terminal of switching circuit, the control of weak electricity measuring circuit
End processed is connected with control module.
The load judgment circuit includes：
Current transformer ZT1, diode D3, diode D4, amplifier U3A, resistance R14, resistance R17 and electric capacity C21, electric current are mutual
The 4th Duan Yu cities electrical connection of sensor ZT1, the 3rd end of current transformer ZT1 are connected with the forceful electric power input of switching circuit, electricity
The negative input end of the first end of current transformer ZT1 anode, the negative electrode of diode D4 and amplifier U3A respectively with diode D3
Connection, second end of current transformer ZT1 anode respectively with diode D4, the negative electrode of diode D3 and amplifier U3A's
Positive input terminal connects, the plus earth of diode D4, and the negative electrode of diode D4 passes through the outfan of resistance R14 and amplifier U3A
Connection, the outfan of amplifier U3A are connected with the first end of resistance R17, and second end of resistance R17 is connected with control module, electricity
Second end of resistance R17 is grounded by electric capacity C21.
The switching circuit includes：Audion Q1, audion Q2, resistive load R20, resistance R18, resistance R19, resistance
R25 and capacitive load C23, diode D5, diode D6, relay RY1, socket ACL2, socket ACN2, relay RY1 include
Relay coil and double-point double-throw switch, switching circuit are also connected with the control power end of switching power circuit,
The emitter stage of audion Q2 is connected with the light current outfan of switching power circuit, emitter stage and the audion Q2 of audion Q2
Base stage between connected by resistance R25, the base stage of audion Q2 is connected with control module connector, audion Q2's
Colelctor electrode is connected with the first normally-closed contact of double-point double-throw switch；
First normally opened contact of double-point double-throw switch and the three-terminal link of current transformer ZT1, the second of double-point double-throw switch
Normally opened contact is connected with civil power zero line；
The negative electrode of diode D5 is connected with the light current outfan of switching power circuit, the anode of diode D5 and the collection of audion Q1
Electrode connects, and the negative electrode of diode D5 is connected with the anode of diode D5 by relay coil, and the emitter stage of audion Q1 connects
Ground, the base stage of audion Q1 are connected with a connector of control module by resistance R18, and the base stage of audion Q1 passes through resistance
R19 is connected with the emitter stage of audion Q1；
First movable contact of double-point double-throw switch is connected with socket ACL2, the second movable contact and the socket ACN2 of double-point double-throw switch
Connection, socket ACL2 are connected with socket ACN2 by resistive load R20, and socket ACL2 also passes through capacitive load C23 and socket
ACN2 connects.
The weak electricity measuring circuit includes resistance R21, resistance R22, resistance R26, resistance R24, resistance R23, diode D6
With electric capacity C22, the first end of resistance R21 connected with second end of resistance R22, and the first end of resistance R22 is connect by resistance R23
Ground, the first end of resistance R24 are connected with the first end of resistance R22, and second end of resistance R24 is grounded by electric capacity C22, resistance
Second end of R24 is connected with the anode of diode D6, and the negative electrode of diode D6 is connected with control power end, the anode of diode D6
It is connected with a connector of control module, second end of resistance R21 is connected with a connector of control module by resistance R26
Connect, second end of resistance R21 is connected with the second normally-closed contact of double-point double-throw switch.
The control module is the single-chip microcomputer for including two analog digital conversion AD mouths, an input port and two delivery outlets.
A kind of safe conversion method of intelligent strong and weak electricity, it is adaptable to intelligence strong and weak electricity safety switching device as above,
Load judgment circuit judges situation about loading in forceful electric power work, has sensed no current by current transformer ZT1, and
Amplify through amplifier U3A and be converted into voltage so that the voltage for detecting enters an analog digital conversion AD mouth of control module
MCU-AD1 judges to be currently operating in underloading, heavy duty or no-load condition；
Switching circuit judged loadtype and switched the output of forceful electric power or light current by relay RY1, when electricity on control device or
When being converted into light current from forceful electric power, the control mouth MCU-IO1 output low level of control module, audion Q1 disconnect, relay RY1 works
Make in normally-closed contact, now start to judge that load is resistive load, capacitive load or zero load；
The determination methods of resistive load：
In 1 second, safe voltage has directly been connected to socket by audion Q2 by the control audion Q2 conductings of control unit MCU
On ACL2, if there is resistive load outside, then the current loop of safe voltage will be connected to socket by resistive load R20
ACN2, then by resistance R21, R22 and the partial pressure of resistance R23, obtains the magnitude of voltage of resistive load, by current-limiting resistance R24
It is connected in control module, different voltages is obtained according to the size of resistive load, MCU is so as to judging it is short circuit, open circuit or people
Body is contacted, if short circuit or human contact's situation would not switch to forceful electric power, has carried out the protection of safety；
The determination methods of capacitive load：
As judged within 1 second without resistive load above, the delivery outlet MCU-IO2 level that can arrange control module at lower 1 second is that pulse is defeated
Go out, the voltage of an alternation will be produced, capacitive load electric capacity C23 there will be electric current to pass through, so as to form loop, now electric current will be logical
Cross resistance R26 and be connected to control module, directly determine whether voltage to determine whether capacitive load；
Unloaded determination methods：
Resistive load was judged above by 1 second, the another method for judging capacitive load in 1 second draws the presence for whether having real load,
If both above load is all judged as NO, then be exactly unloaded；
According to above-mentioned judgement, if resistive or capacitive load, control module drives audion Q1 conductings, relay RY1 works
Make in normally opened contact, accessory power outlet ACL2 and ACN2 switches to forceful electric power to export.
The present embodiment by the difference according to load, intelligent decision short circuit, open circuit, human contact, resistive load, capacitive load etc.,
Socket, switch etc. are perfectly solved using the unsafe problem of class occasion, the vacuum requirement in market has been filled up, it will is produced huge
Big economical, societal benefits.
Embodiment described above is one kind preferably scheme of the present invention, not the present invention is made any pro forma
Limit, also have other variants and remodeling on the premise of without departing from the technical scheme described in claim.
Claims (6)
1. a kind of intelligent strong and weak electricity safety switching device, by mains-supplied, it is characterised in that include：
Switching power circuit, switching power circuit input are electrically connected with city, the light current outfan of switching power circuit and switching
The light current input connection of circuit；
Control module, is powered by switching power circuit, is connected with the outfan of load judgment circuit, the control end with switching circuit
Connection；
Load judgment circuit, the detection input of load judgment circuit are electrically connected with city, the detection output of load judgment circuit
It is connected with the forceful electric power input of switching circuit, load judgment circuit output end is connected with control module；
Switching circuit, the control end of switching circuit are connected with control module, the light current input of switching circuit and switch power supply
The outfan connection on road, the forceful electric power input of switching circuit are connected with the detection output of load judgment circuit, switching circuit
Earth terminal is connected with weak electricity measuring circuit, and the connecting to neutral end of switching circuit is connected with civil power zero line；
Weak electricity measuring circuit：The earth terminal of weak electricity measuring circuit is connected with the earth terminal of switching circuit, the control of weak electricity measuring circuit
End processed is connected with control module.
2. intelligent strong and weak electricity safety switching device according to claim 1, it is characterised in that the load judgment circuit bag
Include：
Current transformer ZT1, diode D3, diode D4, amplifier U3A, resistance R14, resistance R17 and electric capacity C21, electric current are mutual
The 4th Duan Yu cities electrical connection of sensor ZT1, the 3rd end of current transformer ZT1 are connected with the forceful electric power input of switching circuit, electricity
The negative input end of the first end of current transformer ZT1 anode, the negative electrode of diode D4 and amplifier U3A respectively with diode D3
Connection, second end of current transformer ZT1 anode respectively with diode D4, the negative electrode of diode D3 and amplifier U3A's
Positive input terminal connects, the plus earth of diode D4, and the negative electrode of diode D4 passes through the outfan of resistance R14 and amplifier U3A
Connection, the outfan of amplifier U3A are connected with the first end of resistance R17, and second end of resistance R17 is connected with control module, electricity
Second end of resistance R17 is grounded by electric capacity C21.
3. intelligent strong and weak electricity safety switching device according to claim 2, it is characterised in that the switching circuit includes：
Audion Q1, audion Q2, resistive load R20, resistance R18, resistance R19, resistance R25 and capacitive load C23, diode D5,
Diode D6, relay RY1, socket ACL2, socket ACN2, relay RY1 include relay coil and double-point double-throw switch, cut
Change circuit to be also connected with the control power end of switching power circuit,
The emitter stage of audion Q2 is connected with the light current outfan of switching power circuit, emitter stage and the audion Q2 of audion Q2
Base stage between connected by resistance R25, the base stage of audion Q2 is connected with control module connector, audion Q2's
Colelctor electrode is connected with the first normally-closed contact of double-point double-throw switch；
First normally opened contact of double-point double-throw switch and the three-terminal link of current transformer ZT1, the second of double-point double-throw switch
Normally opened contact is connected with civil power zero line；
The negative electrode of diode D5 is connected with the light current outfan of switching power circuit, the anode of diode D5 and the collection of audion Q1
Electrode connects, and the negative electrode of diode D5 is connected with the anode of diode D5 by relay coil, and the emitter stage of audion Q1 connects
Ground, the base stage of audion Q1 are connected with a connector of control module by resistance R18, and the base stage of audion Q1 passes through resistance
R19 is connected with the emitter stage of audion Q1；
First movable contact of double-point double-throw switch is connected with socket ACL2, the second movable contact and the socket ACN2 of double-point double-throw switch
Connection, socket ACL2 are connected with socket ACN2 by resistive load R20, and socket ACL2 also passes through capacitive load C23 and socket
ACN2 connects.
4. intelligent strong and weak electricity safety switching device according to claim 3, it is characterised in that the weak electricity measuring circuit bag
Include resistance R21, resistance R22, resistance R26, resistance R24, resistance R23, diode D6 and electric capacity C22, the first end of resistance R21 with
The second end series connection of resistance R22, the first end of resistance R22 are grounded by resistance R23, and the first end of resistance R24 is with resistance R22's
First end connects, and second end of resistance R24 is grounded by electric capacity C22, and second end of resistance R24 is connected with the anode of diode D6
Connect, the negative electrode of diode D6 is connected with control power end, and the anode of diode D6 is connected with control module connector, electricity
Second end of resistance R21 is connected with a connector of control module by resistance R26, second end of resistance R21 and DPDT
The second normally-closed contact connection of switch.
5. intelligent strong and weak electricity safety switching device according to claim 3, it is characterised in that the control module is to include
There is the single-chip microcomputer of two analog digital conversion AD mouths, an input port and two delivery outlets.
6. a kind of safe conversion method of intelligent strong and weak electricity, it is adaptable to the safe converting means of intelligence strong and weak electricity as claimed in claim 4
Put, it is characterised in that
Load judgment circuit judges situation about loading in forceful electric power work, has sensed no current by current transformer ZT1, and
Amplify through amplifier U3A and be converted into voltage so that the voltage for detecting enters an analog digital conversion AD mouth of control module
MCU-AD1 judges to be currently operating in underloading, heavy duty or no-load condition；
Switching circuit judged loadtype and switched the output of forceful electric power or light current by relay RY1, when electricity on control device or
When being converted into light current from forceful electric power, the control mouth MCU-IO1 output low level of control module, audion Q1 disconnect, relay RY1 works
Make in normally-closed contact, now start to judge that load is resistive load, capacitive load or zero load；
The determination methods of resistive load：
In 1 second, safe voltage has directly been connected to socket by audion Q2 by the control audion Q2 conductings of control unit MCU
On ACL2, if there is resistive load outside, then the current loop of safe voltage will be connected to socket by resistive load R20
ACN2, then by resistance R21, R22 and the partial pressure of resistance R23, obtains the magnitude of voltage of resistive load, by current-limiting resistance R24
It is connected in control module, different voltages is obtained according to the size of resistive load, MCU is so as to judging it is short circuit, open circuit or people
Body is contacted, if short circuit or human contact's situation would not switch to forceful electric power, has carried out the protection of safety；
The determination methods of capacitive load：
As judged within 1 second without resistive load above, the delivery outlet MCU-IO2 level that can arrange control module at lower 1 second is that pulse is defeated
Go out, the voltage of an alternation will be produced, capacitive load electric capacity C23 there will be electric current to pass through, so as to form loop, now electric current will be logical
Cross resistance R26 and be connected to control module, directly determine whether voltage to determine whether capacitive load；
Unloaded determination methods：
Resistive load was judged above by 1 second, the another method for judging capacitive load in 1 second draws the presence for whether having real load,
If both above load is all judged as NO, then be exactly unloaded；
According to above-mentioned judgement, if resistive or capacitive load, control module drives audion Q1 conductings, relay RY1 works
Make in normally opened contact, accessory power outlet ACL2 and ACN2 switches to forceful electric power to export.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710015976.XA CN106533242B (en) | 2017-01-10 | 2017-01-10 | Intelligent strong and weak current safety conversion device and safety conversion method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710015976.XA CN106533242B (en) | 2017-01-10 | 2017-01-10 | Intelligent strong and weak current safety conversion device and safety conversion method thereof |
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| Publication Number | Publication Date |
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| CN106533242A true CN106533242A (en) | 2017-03-22 |
| CN106533242B CN106533242B (en) | 2023-05-23 |
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| CN201710015976.XA Active CN106533242B (en) | 2017-01-10 | 2017-01-10 | Intelligent strong and weak current safety conversion device and safety conversion method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108134273A (en) * | 2017-12-08 | 2018-06-08 | 刘冰冰 | The safety electric outlet circuit of low pressure detection control |
| CN108574280A (en) * | 2018-07-09 | 2018-09-25 | 四川微源科技有限公司 | electrical safety device |
| CN108958444A (en) * | 2018-07-26 | 2018-12-07 | 烟台职业学院 | A kind of power switch circuit and control method of vulnerabilities scan forceful electric power |
| CN109038791A (en) * | 2017-06-12 | 2018-12-18 | 天津市中力防雷技术有限公司 | A kind of power-supply device |
| CN117767965A (en) * | 2024-01-10 | 2024-03-26 | 荣耀终端有限公司 | Power supply and load switching circuit, low noise amplifier and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109038791A (en) * | 2017-06-12 | 2018-12-18 | 天津市中力防雷技术有限公司 | A kind of power-supply device |
| CN108134273A (en) * | 2017-12-08 | 2018-06-08 | 刘冰冰 | The safety electric outlet circuit of low pressure detection control |
| CN108134273B (en) * | 2017-12-08 | 2023-12-12 | 刘冰冰 | Power safety socket circuit controlled by low-voltage detection |
| CN108574280A (en) * | 2018-07-09 | 2018-09-25 | 四川微源科技有限公司 | electrical safety device |
| CN108958444A (en) * | 2018-07-26 | 2018-12-07 | 烟台职业学院 | A kind of power switch circuit and control method of vulnerabilities scan forceful electric power |
| CN108958444B (en) * | 2018-07-26 | 2021-04-23 | 烟台职业学院 | Power switch circuit for controlling strong current by weak current and control method |
| CN117767965A (en) * | 2024-01-10 | 2024-03-26 | 荣耀终端有限公司 | Power supply and load switching circuit, low noise amplifier and electronic equipment |
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