CN202453405U - Alternating current detection circuit and automatic power-off circuit with power-off zero power consumption - Google Patents
Alternating current detection circuit and automatic power-off circuit with power-off zero power consumption Download PDFInfo
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- CN202453405U CN202453405U CN2011205203714U CN201120520371U CN202453405U CN 202453405 U CN202453405 U CN 202453405U CN 2011205203714 U CN2011205203714 U CN 2011205203714U CN 201120520371 U CN201120520371 U CN 201120520371U CN 202453405 U CN202453405 U CN 202453405U
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Abstract
The utility model discloses an alternating current detection circuit and an automatic power-off circuit with power-off zero power consumption. The alternating current detection circuit comprises a resistor R1, a resistor R2, a capacitor C1, a filter element C2, a diode D1, a diode D2, a photoelectric tube U1, and a diode D3 or a triode P1, wherein the positive electrode end of the diode D1 is connected with the negative electrode end of the diode D2, and the connecting end is an endpoint X; the negative electrode end of the diode D1 is connected with the positive electrode end of the diode D2, and the connecting end is an endpoint Y; and two ends of the resistor R1 are connected with the endpoint X and the endpoint Y respectively. The automatic power-off circuit with the power-off zero power consumption is provided with the alternating current detection circuit and is used as a current detection device. The alternating current detection circuit and the automatic power-off circuit have the advantages that current can be convenient to detect, a circuit structure is easy to miniaturize, a socket can be disconnected from an external power supply completely after electrical equipment is switched off and the like.
Description
Technical field
The utility model relates to the automatic power-down circuit of a kind of alternating current testing circuit and outage zero-power.
Background technology
What the mode of current detecting was common has following several types: resistance in series detects, current transformer detects and Hall device detects.These several types of detections all have relative merits separately.Resistance detection only is applicable in the circuit of little electric current.In the testing circuit of big electric current; If adopt the insertion loss that detects in the resistance series loop big; Its dissipated power reaches several watts even tens of watts; This not only requires the volume of resistance bigger, and other precision resistance of milliohm level is difficult to find the special double requirements that the detection mode of resistance in series is difficult to look after detection sensitivity and tolerates big electric current under the very big situation of load current variation range.Generally can not adopt this mode in this case; In the detection electric current of big electric current, common is exactly the mode that adopts current transformer to detect, and its shortcoming is that mutual inductor is easy to generate magnetic saturation and causes the error that detects, and volume is big, is difficult to integrated.Ear detects and also is usually used in the current detecting suddenly, and it is to convert current signal into magnetic signal to carry out through the mode that Hall device converts electric signal to.There is insensitive problem in it to little current detection circuit.
In daily life, electrical equipments such as TV, sound equipment, STB, video disc player and air-conditioning have distant control function usually, and the user can shut down easily, makes these equipment be in holding state, so that saves energy.But the electrical equipment that is in holding state is understood consumed power, and equipment is in holding state for a long time, will cause the waste of a large amount of electric energy.At work; Staff does not After Hours pull up plug or close socket usually with behind the shut down of computer, makes computer main equipment and auxiliary devices such as display, printer be in the state of energising; These equipment all still can consume certain electric energy, have caused a large amount of waste of power resources.
Existing energy-conservation socket with automatic circuit break function; After socket cut off, the internal circuit of socket itself still was in "on" position, so also can cause a unit waste of power resources; Can not socket and electrical equipment be cut off the power supply together, can cause waste of power resources.Application number is that the Chinese utility model patent of CN201020172576.3 provides a kind of computer special intelligent type energy-conservation insert row; Comprise assemblies such as single-chip microcomputer governor circuit, trigger pip receiving element, reference voltage circuit, direct current+5V voltage generation circuit, direct current+24V voltage generation circuit, current sampling detecting unit, gate-controlled switch device, computer main equipment power source special socket, peripheral hardware supply socket, mode conversion switch and wireless transmitting unit; Can be behind shut down of computer powered-down automatically; But the same shortcoming that exists socket itself always to be in the state of energising power consumption of this patent, and there are shortcomings such as complex structure, cost of manufacture height with above-mentioned two patents.
The utility model content
The utility model is the weak point that exists in the above-mentioned prior art for avoiding; The automatic power-down circuit of a kind of alternating current testing circuit and outage zero-power is provided; Can detect electric current easily and make circuit mechanism be easy to miniaturization, making electrical equipment close rear socket can break off with external power supply fully.
The utility model is the technical solution problem, and a kind of alternating current testing circuit is provided.
Alternating current testing circuit, its design feature are to comprise resistance R 1, resistance R 2, capacitor C 1, filter element C2, diode D1, diode D2 and photoelectric tube U1; The negative pole end of the positive terminal of said diode D1 and diode D2 interconnects, and link is end points X; The positive terminal of the negative pole end of said diode D1 and diode D2 interconnects, and link is end points Y; The two ends of said resistance R 1 are connected with end points Y with end points X respectively; One end of said capacitor C 1 is connected with said end points Y, and the other end of said capacitor C 1 is connected with the link C of said photoelectric tube U1 through said resistance R 2; The end of said filter element C2 is connected with said end points Y, and the other end of said filter element C2 is connected with the link D of said photoelectric tube U1; Said end points X is connected with the link D of said photoelectric tube U1; Also comprise diode D3 (like Fig. 1) or triode P1 (like Fig. 2 and Fig. 3), said triode P1 is NPN type or positive-negative-positive; The positive terminal of said diode D3 is connected between said capacitor C 1 and the resistance R 2, and the negative pole end of said diode D3 is connected with the link D of photoelectric tube U1; Perhaps, the base stage of said triode P1 is connected with said end points Y through resistance R 3, and the collector of said triode P1 is connected between said capacitor C 1 and the resistance R 2, and the emitter of said triode P1 is connected with the link D of said photoelectric tube U1.
Said filter element C2 is electric capacity or low-pass filter.
The utility model also provides a kind of automatic power-down circuit that is provided with the outage zero-power of above-mentioned alternating current testing circuit.
Be provided with the automatic power-down circuit of the outage zero-power of described alternating current testing circuit, it is characterized in that, also comprise from resetting normal open switch K, gate-controlled switch device, master control output terminal, auxiliary device output terminal, delay unit, control module and feed circuit; Said alternating current testing circuit is used to detect the output current of master control output terminal; Said being in parallel with the gate-controlled switch device from the normal open switch K that resets is connected, and two connected nodes are respectively node A and Node B; Said node A is connected with second terminal of external power source input end; Said Node B is connected with the alternating current testing circuit, and the alternating current testing circuit is serially connected in the output loop of master control; Said alternating current testing circuit also is connected with control module through delay unit, and control module is connected with the gate-controlled switch device; Said feed circuit are used to alternating current testing circuit, delay unit and control module WV are provided; Two terminals of auxiliary device output terminal are connected with the first terminal of Node B with the external power source input end respectively; Said alternating current testing circuit, delay unit and control module all are connected with feed circuit and by feed circuit power supply are provided.
Said gate-controlled switch device is relay, thyristor or solid-state relay, also can be the automatic control switch that can be controlled break-make by external signal of other kinds.
Compared with present technology, the utility model beneficial effect is embodied in:
The alternating current testing circuit of the utility model adopts that sample resistance R1 is parallelly connected with two or two groups of reverse parallel connection diodes to be connected in series in the load as taking a sample then.Two of reverse parallel connection or two groups of diodes play the protective effect to resistance; Under the big current work state; Actual in the electric current of resistance less (being about 0.75/R); Power consumption also can less (being about 0.5/R), the permission electric current decision the when maximum of this testing circuit detects electric current by the diode forward conducting of two or two groups reverse parallel connections.Because the clamping action of two diodes, the peak-peak voltage at R two ends should be the about 0.75V of saturation conduction voltage of diode.The maximum characteristics of this circuit are: 1) thus change to further control through the electric current that the size that changes sample resistance can detect load very easily and to provide convenience; 2) output terminal and test side are isolated, be convenient to signal is further handled, thereby it are all very convenient to be used for the detection of high pressure or extra high voltage line electric current; 3) all-semiconductor device is convenient to integrated and miniaturization, can all part integrated modulars be produced, and is integrated into four end detection means; 4), can also the circuit of high-frequency high-power output be detected and control because the frequency response speed of semiconductor devices is fast, and this structural circuit not only can be used for the detection of industrial frequency AC electric current; 5) test section need not other dc power supply, only need circuit be connected in the testing circuit to get final product.This circuit is used for device standby to be detected very convenient.When the equipment operate as normal, its working current is bigger, and is also bigger in the pressure drop at resistance two ends; Output terminal output this moment pulse switch signal, if equipment is in standby (little current status) or off-mode, then output terminal interrupts; No signal output shows as the high impedance open-circuit condition.
When the telepilot that the user presses main equipment cuts out main equipment when closing computer host box (or user), when main equipment is in holding state when being in off-mode (or computer), the output current of master control output terminal will reduce.The alternating current testing circuit detects the output current of master control output terminal when very low; Under the cooperation of delay unit; Send a signal through certain delay to control module; When control module receives the signal of control module transmission, will discharge or close the gate-controlled switch device, cut off all power supplies thereafter.Because the gate-controlled switch device all directly links to each other with the external power source input end with the normal open switch K that resets certainly; Thereby the power-down circuit of the utility model, main equipment and auxiliary device all can cut off the power supply; Thereby realize the outage fully of automatic power-down circuit and electrical equipment, realize the purpose of zero-power.The automatic power-down circuit of the utility model has and can make electrical equipment close rear socket can to break off, realize advantages such as electrical equipment and socket outage back zero-power with external power supply fully.
Description of drawings
Fig. 1 is the electrical block diagram of first embodiment of the alternating current testing circuit of the utility model.
Fig. 2 is the electrical block diagram of second embodiment of the alternating current testing circuit of the utility model.
Fig. 3 is the electrical block diagram of the 3rd embodiment of the alternating current testing circuit of the utility model.
Fig. 4 is the electrical block diagram of the automatic power-down circuit of the utility model.
Label among Fig. 1～Fig. 4: 1 the first terminal, 2 second terminals, 3 the 3rd terminals, 4 external power source input ends.
Below pass through embodiment, and combine accompanying drawing that the utility model is described further.
Embodiment
Referring to Fig. 1～Fig. 4, the alternating current testing circuit comprises resistance R 1, resistance R 2, capacitor C 1, filter element C2, diode D1, diode D2 and photoelectric tube U1; The negative pole end of the positive terminal of said diode D1 and diode D2 interconnects, and link is end points X; The positive terminal of the negative pole end of said diode D1 and diode D2 interconnects, and link is end points Y; The two ends of said resistance R 1 are connected with end points Y with end points X respectively; One end of said capacitor C 1 is connected with said end points Y, and the other end of said capacitor C 1 is connected with the link C of said photoelectric tube U1 through said resistance R 2; The end of said filter element C2 is connected with said end points Y, and the other end of said filter element C2 is connected with the link D of said photoelectric tube U1; Said end points X is connected with the link D of said photoelectric tube U1; Also comprise diode D3 (like Fig. 1) or triode P1 (like Fig. 2 and Fig. 3), said triode P1 is NPN type or positive-negative-positive; The positive terminal of said diode D3 is connected between said capacitor C 1 and the resistance R 2, and the negative pole end of said diode D3 is connected with the link D of photoelectric tube U1; Perhaps, the base stage of said triode P1 is connected with said end points Y through resistance R 3, and the collector of said triode P1 is connected between said capacitor C 1 and the resistance R 2, and the emitter of said triode P1 is connected with the link D of said photoelectric tube U1.
Like Fig. 1, when electric current flow through sample resistance from exporting out end flow direction input in end, its electric current part was charged to C1 through D3, at this time not conducting of photoelectric tube U1; The last charging voltage of C1 is the conduction voltage drop that the pressure drop of electric current on sample resistance deducts D3, and the last voltage of C1 is that the positive right-hand member of left end is for negative; When electric current flows from input in end process sample resistance conversely when output terminal out flows; The photoelectric tube that one part of current flows through U1 carries out reverse charging to C1; The voltage that at this time is added in the photoelectric tube two ends is UR1+UC1, and the photoelectric tube two ends have enough exciting currents to produce the output signal by output terminal.In order to improve circuit the sensitivity of current detecting is reduced the resistance of sample resistance simultaneously, D3 can select the less germanium semiconductor class diode of conduction voltage drop for use, and its saturation conduction pressure drop has only about 0.3V.In order further to reduce the resistance of sample resistance; Increase efficient; Reduce and insert loss, can change diode D3 into triode, utilize the pressure drop of triode saturation conduction to have only the characteristics about 0.1V to make the alternating current half cycle more abundant the charging of capacitor C 1; UR1+UC1 is responsive more to the variation of alternating current, thereby makes detection output more responsive quick to the input end change in current.Two kinds of the employing triode connect method and see respectively shown in Fig. 2 and Fig. 3.
Said filter element C2 is electric capacity or low-pass filter.
Be provided with the automatic power-down circuit of the outage zero-power of described alternating current testing circuit, also comprise from resetting normal open switch K, gate-controlled switch device, master control output terminal, auxiliary device output terminal, delay unit, control module and feed circuit; Said alternating current testing circuit is used to detect the output current of master control output terminal; Said being in parallel with the gate-controlled switch device from the normal open switch K that resets is connected, and two connected nodes are respectively node A and Node B; Said node A is connected with second terminal 2 of external power source input end 4; Said Node B is connected with the alternating current testing circuit; The alternating current testing circuit is serially connected in the output loop of master control; The alternating current testing circuit is connected with a terminal of master control output terminal, and another terminal of master control output terminal is connected with the first terminal 1 of external power source input end; Said alternating current testing circuit also is connected with control module through delay unit, and control module is connected with the gate-controlled switch device; Said feed circuit are used to alternating current testing circuit, delay unit and control module WV are provided; Two terminals of auxiliary device output terminal are connected with the first terminal 1 of Node B and external power source input end 4 respectively; Said alternating current testing circuit, delay unit and control module all are connected with feed circuit and by feed circuit power supply are provided.Usually be in the state of disconnection from the normal open switch K that resets.During start, press, connect circuit from the normal open switch K that resets, adhesive at once of gate-controlled switch device or conducting, even normal open switch shutoffs that reset this moment, owing to the adhesive or the conducting of gate-controlled switch type device, the main control equipment output terminal is normal power supply all.If do not open main equipment (main equipment is under standby or the off-mode) this moment always; Its master control output is in low current or no current output state; Be serially connected in the current detection circuit process certain delay under the cooperation of delay unit in the main output loop, send the signal that discharges or close to control module, at this moment the gate-controlled switch device discharges or closes; Turn-off all power devices, comprise supplying power of circuit itself.If after pressing reset switch K; Gate-controlled switch device time-delay (delay time is variable through changing component parameters) is opened main equipment, at this moment the main equipment operate as normal before turn-offing; Main output loop output current is bigger; The alternating current testing circuit sends signal, stops the work of delay unit, avoids sending release or shutdown signal to the gate-controlled switch device.At this moment, the gate-controlled switch device can be in adhesive or conducting state always, keeps the normal power supply continuously of master control output terminal and attached apparatus of output terminal.Delay unit has only participation work under the state of master control at low current, and when the master control running current reached certain value, delay unit was not worked.
When the user presses the telepilot of main equipment or turn-off the main equipment power switch when closing main equipment when closing host computer (or user), the output current of master control output terminal will reduce.The output current that the alternating current testing circuit detects the master control output terminal is very low; Under the cooperation of delay unit; Through after the time-delay of Preset Time, send the signal that discharges or close the gate-controlled switch device to control module, when control module receives cut-off signals; Discharge the gate-controlled switch device, break off all connections with external power source.Circuit is in not electriferous state.Because the gate-controlled switch device all directly links to each other with the external power source input end with the normal open switch K that resets certainly; Thereby the power-down circuit of the utility model, main equipment and auxiliary device all can cut off the power supply; Thereby realize the outage fully of automatic power-down circuit and electrical equipment, realize the purpose of zero-power.
Said gate-controlled switch device is relay, thyristor or solid-state relay, also can be the automatic control switch that can be controlled break-make by external signal of other kinds.
This circuit is schemed as follows as the electric current electrical measurement unit principle of the automatic power-down circuit of outage zero-power is total: after reset switch is pressed; Gate-controlled switch type device conducting or adhesive under the effect of control circuit; If master control apparatus of output terminal normal boot-strap, then enough big through the electric current that detects treatment circuit, the photoelectricity receiving end of U1 presents interrupted conducting state; Let the delay capacitor of delay circuit discharge through photoelectric receiving tube; The electric charge that charges on the delay capacitor is constantly through the discharge of U1 photoelectricity receiving end, and delay circuit can't send the signal that discharges (or cutting out) gate-controlled switch type device to control circuit, and gate-controlled switch type device will be kept conducting or attracting state always.At this moment attached apparatus of output terminal also keeps to such an extent that the electrician makes state with the open state of the equipment of master control always.If the master control apparatus of output terminal does not have normal boot-strap or is in holding state; At this time be not enough to make the optoelectronic switch conducting through the electric current of testing circuit is less; The photoelectric tube of its receiving end is in high resistant or off state; Delay capacitor can't send the signal that turn-offs or discharge the controllable type switching device through delay circuit after the certain delay through the discharge of U1 output terminal to control circuit.At this time because K switch is a self-resetting switch; Be in off state under the normal condition; Along with the disconnection of controllable type switching device or close, self power supply of whole master control output terminal and auxiliary device output terminal and this circuit etc. is all cut off, thereby realizes the purpose of outage zero-power.
Device standby cuts off the power supply in the socket automatically, and described automatic power-down circuit can be set.Socket also comprises main equipment interface and auxiliary device interface, and said master control output terminal is connected with the main equipment interface, and said auxiliary device output terminal is connected with the auxiliary device interface.In this socket, the plug of main equipment interface and main frame plugs, and the auxiliary device interface is connected with the auxiliary device plug.By the break-make electricity of automatic power-down circuit control main equipment interface, auxiliary device interface, after the main process equipment shutdown, make internal circuit, main equipment, the auxiliary device of whole socket all cut off the power supply fully, realize the zero-power of consumer and socket.The 3rd terminal 3 of external power source input end 4 is an earth terminal, and said the 3rd terminal 3 is connected with the earth terminal of main equipment interface and the earth terminal of auxiliary device interface respectively.Main equipment interface and auxiliary device interface are connected earth terminal, can improve the safety in utilization of socket.
Claims (4)
1. the alternating current testing circuit is characterized in that, comprises resistance R 1, resistance R 2, capacitor C 1, filter element C2, diode D1, diode D2 and photoelectric tube U1; The negative pole end of the positive terminal of said diode D1 and diode D2 interconnects, and link is end points X; The positive terminal of the negative pole end of said diode D1 and diode D2 interconnects, and link is end points Y; The two ends of said resistance R 1 are connected with end points Y with end points X respectively; One end of said capacitor C 1 is connected with said end points Y, and the other end of said capacitor C 1 is connected with the link C of said photoelectric tube U1 through said resistance R 2; The end of said filter element C2 is connected with said end points Y, and the other end of said filter element C2 is connected with the link D of said photoelectric tube U1; Said end points X is connected with the link D of said photoelectric tube U1;
Also comprise diode D3 or triode P1, said triode P1 is NPN type or positive-negative-positive; The positive terminal of said diode D3 is connected between said capacitor C 1 and the resistance R 2, and the negative pole end of said diode D3 is connected with the link D of photoelectric tube U1; Perhaps, the base stage of said triode P1 is connected with said end points Y through resistance R 3, and the collector of said triode P1 is connected between said capacitor C 1 and the resistance R 2, and the emitter of said triode P1 is connected with the link D of said photoelectric tube U1.
2. alternating current testing circuit according to claim 1 is characterized in that, said filter element C2 is electric capacity or low-pass filter.
3. be provided with the automatic power-down circuit of the outage zero-power of claim 1 or 2 described alternating current testing circuits; It is characterized in that, also comprise from resetting normal open switch K, gate-controlled switch device, master control output terminal, auxiliary device output terminal, delay unit, control module and feed circuit; Said alternating current testing circuit is used to detect the output current of master control output terminal; Said being in parallel with the gate-controlled switch device from the normal open switch K that resets is connected, and two connected nodes are respectively node A and Node B; Said node A is connected with second terminal (2) of external power source input end (4); Said Node B is connected with the alternating current testing circuit, and the alternating current testing circuit is serially connected in the output loop of master control; Said alternating current testing circuit also is connected with control module through delay unit, and control module is connected with the gate-controlled switch device; Said feed circuit are used to alternating current testing circuit, delay unit and control module WV are provided; Two terminals of auxiliary device output terminal are connected with the first terminal (1) of Node B and external power source input end (4) respectively; Said alternating current testing circuit, delay unit and control module all are connected with feed circuit and by feed circuit power supply are provided.
4. the automatic power-down circuit of outage zero-power according to claim 3 is characterized in that, said gate-controlled switch device is relay, thyristor or solid-state relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205203714U CN202453405U (en) | 2011-12-13 | 2011-12-13 | Alternating current detection circuit and automatic power-off circuit with power-off zero power consumption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205203714U CN202453405U (en) | 2011-12-13 | 2011-12-13 | Alternating current detection circuit and automatic power-off circuit with power-off zero power consumption |
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| Publication Number | Publication Date |
|---|---|
| CN202453405U true CN202453405U (en) | 2012-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205203714U Expired - Fee Related CN202453405U (en) | 2011-12-13 | 2011-12-13 | Alternating current detection circuit and automatic power-off circuit with power-off zero power consumption |
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| Country | Link |
|---|---|
| CN (1) | CN202453405U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495267A (en) * | 2011-12-13 | 2012-06-13 | 合肥工业大学 | Alternating current detection circuit and automatic power-off circuit with zero power-off power consumption |
| CN109100557A (en) * | 2018-08-07 | 2018-12-28 | 六安市同心畅能电子科技有限公司 | Electronic active photoelectric current inductor |
-
2011
- 2011-12-13 CN CN2011205203714U patent/CN202453405U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495267A (en) * | 2011-12-13 | 2012-06-13 | 合肥工业大学 | Alternating current detection circuit and automatic power-off circuit with zero power-off power consumption |
| CN109100557A (en) * | 2018-08-07 | 2018-12-28 | 六安市同心畅能电子科技有限公司 | Electronic active photoelectric current inductor |
| CN109100557B (en) * | 2018-08-07 | 2020-11-20 | 六安市同心畅能电子科技有限公司 | Electronic active photoelectric current transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120926 Termination date: 20141213 |
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| EXPY | Termination of patent right or utility model |