CN109991535A - A kind of flash on-off control system and its input flash detection circuit - Google Patents
A kind of flash on-off control system and its input flash detection circuit Download PDFInfo
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- CN109991535A CN109991535A CN201910319585.6A CN201910319585A CN109991535A CN 109991535 A CN109991535 A CN 109991535A CN 201910319585 A CN201910319585 A CN 201910319585A CN 109991535 A CN109991535 A CN 109991535A
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/56—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere for ensuring operation of the switch at a predetermined point in the ac cycle
Abstract
This application discloses a kind of input flash detection circuits, including zero crossing comparison module, output resistance, discharge capacity, isolation optocoupler and switch detection module；The output end of zero crossing comparison module is connect with the cathode input terminal of the first end of output resistance, isolation optocoupler respectively；The second end of output resistance is connect with the anode input terminal of the first end of discharge capacity, isolation optocoupler respectively；The second end of discharge capacity and the second input terminal of zero crossing comparison module connect；The output end of the input terminal and isolation optocoupler that switch detection module connects, and the on-off for exporting isolation optocoupler detects signal；Flash occurs for the conducting phenomenon mark direct-flow input signal of isolation optocoupler；When the conduction interval time of isolation optocoupler being greater than the signal period of ac input signal, flash occurs for mark ac input signal.The application significantly reduces system power dissipation, improves product competitiveness and economic benefit.Disclosed herein as well is a kind of flash on-off control systems, it may have above-mentioned beneficial effect.
Description
Technical field
This application involves Smart Home technical field, in particular to a kind of flash on-off control system and its input flash inspection
Slowdown monitoring circuit.
Background technique
Existing traditional switch such as household wall switch often only carries out a switch state after carrying out switch motion
Switching, if will switch and be held off after that is, such switch is pressed by touching in the on-state, until pressed by touching next time.
In this way, traditional switch will be unable to the intelligent control method suitable for smart home.This is because in Modern Smart Home technology
In, for convenience of being used to use, the remote controls mode such as WIFI is mostly used to carry out intelligent starting electrical equipment, and traditional switch is turning off
The power supply that entire circuit will be cut off afterwards, so that WIFI module itself can not work on power, thus can not also start electricity consumption and set
It is standby.Thus, it is desirable to realize Modern Smart Home control using a kind of flash switch different from traditional switch operating mode.With
Traditional switch is different, flash switch pressed by touching after only can instant cut-off or Voltage Drop, then voltage can be enabled to then return to
Ortho states, in this way, the power supply of electrical equipment is not cut off in user's touching by flash switch on the line, WIFI module can still carry out work
Make, electrical equipment starting or closing can be controlled by remote control command after when detecting that flash switch is touched.Flash
Detection circuit is to switch the circuit whether acted for detecting flash, is realizing isolation using isolation optocoupler device
On the basis of carry out flash detection.However, isolation optocoupler is to be within the most of the time in the flash detection circuit of the prior art
On state, conducting electric current is at least 1mA, therefore can generate higher system power dissipation.In consideration of it, providing in a kind of solution
The scheme for stating technical problem is that those skilled in the art urgently pay close attention to.
Summary of the invention
The application's is designed to provide a kind of flash on-off control system and its input flash detection circuit, so as to effective
Ground reduces system power dissipation, improves the economic benefit of product.
In order to solve the above technical problems, in a first aspect, this application discloses a kind of input flash detection circuit, including zero passage
Comparison module, output resistance, discharge capacity, isolation optocoupler and switch detection module；
First input end of the first input end of the zero crossing comparison module as the input flash detection circuit, it is described
Second input terminal of second input terminal of zero crossing comparison module as the input flash detection circuit, the zero crossing comparison module
Output end connect respectively with the cathode input terminal of the first end of the output resistance, the isolation optocoupler；The output resistance
Second end connect respectively with the anode input terminal of the first end of the discharge capacity, the isolation optocoupler；The discharge capacity
Second end connect with the second input terminal of the zero crossing comparison module；The input terminal of the switch detection module is isolated with described
The output end of optocoupler connects, and output end of the output end of the switch detection module as the input flash detection circuit is used
Signal is detected in the on-off for exporting the isolation optocoupler；The zero crossing comparison module is used to carry out zero passage detection to input signal,
And discharge loop is provided for the discharge capacity in the input signal zero passage；
If the input signal is direct current signal, direct current signal described in the conducting phenomenon mark of the isolation optocoupler occurs
Flash；If the input signal is AC signal, it is greater than the AC signal when the conduction interval time of the isolation optocoupler
Signal period when, indicate that flash occurs for the AC signal.
Optionally, the switch detection module includes pull-up resistor and the first power supply；
First output end of the isolation optocoupler is connect by the pull-up resistor with first power supply, and as described
Switch the output end of detection module, the second output terminal ground connection of the isolation optocoupler.
Optionally, the switch detection module further includes the first output end and the second output for being connected to the isolation optocoupler
Protection capacitor between end.
It optionally, further include the input resistance being connect with the first input end of the zero crossing comparison module.
It optionally, further include the pressure stabilizing being connected between the first input end of the zero crossing comparison module and the second input terminal
Pipe.
Optionally, the zero crossing comparison module includes first resistor, second resistance, 3rd resistor, the 4th resistance, first
PMOS tube, the second PMOS tube, the first NMOS tube, the second NMOS tube, reference voltage source, comparator and phase inverter；First electricity
The first end of resistance, the source electrode of first PMOS tube, the source electrode of second PMOS tube, the reference voltage source the first power supply
Input terminal homogeneously connects, and the first input end as the zero crossing comparison module；It is the second end of the first resistor, described
The drain electrode of the first end of second resistance, first PMOS tube homogeneously connects；The second end of the second resistance, the third
The first end of resistance, the comparator normal phase input end homogeneously connect；The output end of the reference voltage source and the ratio
Inverting input terminal compared with device connects；The second end of the 3rd resistor, the first end of the 4th resistance, first NMOS tube
Drain electrode homogeneously connect；The grid of first PMOS tube, first NMOS tube grid, the comparator output
It holds, the input terminal of the phase inverter homogeneously connects；The grid, described of the output end of the phase inverter, second PMOS tube
The grid of second NMOS tube homogeneously connects；The drain electrode of second PMOS tube is connect with the drain electrode of second NMOS tube, and
Output end as the zero crossing comparison module；The of the second source input terminal of the reference voltage source, the 4th resistance
Two ends, the source electrode of first NMOS tube, second NMOS tube source electrode homogeneously connect, and as the Zero-cross comparator mould
Second input terminal of block.
Second aspect, this application discloses a kind of flash on-off control systems, including flash switch, rectification module, pressure regulation
Module, control module, drive module and any input flash detection circuit as described above；
The first end of flash switch for connect with AC power source, the second end that the flash switchs respectively with it is described
Rectification module is connected with the input terminal of the input flash detection circuit；The output end of the rectification module and the voltage regulating module
Input terminal connection, for AC rectification to be exported direct current；The output end of the voltage regulating module and the control module
Feeder ear connection, for providing corresponding operating voltage for the control module；The feeder ear of the drive module with it is described whole
The output end of flow module connects, and the output end of the drive module is connect with electrical equipment, for driving the electrical equipment；Institute
The input terminal for stating control module is connect with the output end of the input flash detection circuit, the output end of the control module and institute
The input terminal connection for stating drive module, for being determined according to the on-off detection signal of the input flash detection circuit output
The switching state of the flash switch, and electrical equipment is controlled according to the switching state and carries out state switching.
It optionally, further include filter module, the input terminal of the filter module is connect with the output end of the rectification module,
The output end of the filter module is connect with the input terminal of the voltage regulating module.
Optionally, the rectification module is specially bridge rectifier module.
Optionally, the control module and the drive module include wireless communication unit, and the control module is specific
The switching state for being switched according to the flash, Xiang Suoshu drive module send the wireless control directives of state switching.
Input flash detection circuit provided herein includes zero crossing comparison module, output resistance, discharge capacity, isolation
Optocoupler and switch detection module；The first input end of the zero crossing comparison module inputs the first of flash detection circuit as described
Input terminal, second input terminal of the second input terminal of the zero crossing comparison module as the input flash detection circuit are described
The output end of zero crossing comparison module is connect with the cathode input terminal of the first end of the output resistance, the isolation optocoupler respectively；
The second end of the output resistance is connect with the anode input terminal of the first end of the discharge capacity, the isolation optocoupler respectively；
The second end of the discharge capacity is connect with the second input terminal of the zero crossing comparison module；The input of the switch detection module
End is connect with the output end of the isolation optocoupler, and the output end of the switch detection module is as the input flash detection circuit
Output end, for export the isolation optocoupler on-off detect signal；The zero crossing comparison module be used for input signal into
Row zero passage detection, and discharge loop is provided in the input signal zero passage for the discharge capacity；If the input signal is
Direct current signal, then flash occurs for direct current signal described in the conducting phenomenon mark of the isolation optocoupler；If the input signal is to hand over
Signal is flowed, then when the conduction interval time of the isolation optocoupler being greater than the signal period of the AC signal, indicates the friendship
It flows signal and flash occurs.
As it can be seen that compared with the prior art, input flash detection circuit provided herein, using zero crossing comparison module,
The specific connection structure of discharge capacity and isolation optocoupler so that discharge capacity only input signal be reduced to reference voltage moment into
Row electric discharge, and detected using electric discharge phenomena of the isolation optocoupler to discharge capacity, thus whether can be generated according to electric discharge phenomena
Either its periodic law realizes the flash detection to direct current or ac input signal respectively.Since isolation optocoupler is only of short duration
It is in the conductive state in discharge process, therefore system power dissipation is significantly reduced, effectively improve product competitiveness and economy
Benefit.Flash on-off control system provided herein includes above-mentioned input flash detection circuit, is equally had above-mentioned beneficial
Effect.
Detailed description of the invention
In order to illustrate more clearly of the technical solution in the prior art and the embodiment of the present application, below will to the prior art and
Attached drawing to be used is needed to make brief introduction in the embodiment of the present application description.Certainly, in relation to the attached drawing of the embodiment of the present application below
A part of the embodiment in only the application of description is not paying creativeness to those skilled in the art
Under the premise of labour, other attached drawings can also be obtained according to the attached drawing of offer, other accompanying drawings obtained also belong to the application
Protection scope.
Fig. 1 is the structural schematic diagram of input flash detection circuit provided herein in a specific embodiment；
Fig. 2 is the structural schematic diagram of input flash detection circuit provided herein in another specific embodiment；
Fig. 3 is the circuit structure diagram of zero crossing comparison module provided herein in a specific embodiment；
Fig. 4 is the structural block diagram of flash on-off control system provided herein in a specific embodiment；
Fig. 5 is the structural block diagram of flash on-off control system provided herein in another specific embodiment.
Specific embodiment
The core of the application is to provide a kind of flash on-off control system and its input flash detection circuit, so as to effective
Ground reduces system power dissipation, improves the economic benefit of product.
In order to which technical solutions in the embodiments of the present application is more clearly and completely described, below in conjunction with this Shen
Please attached drawing in embodiment, technical solutions in the embodiments of the present application is introduced.Obviously, described embodiment is only
Some embodiments of the present application, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall in the protection scope of this application.
As previously mentioned, flash switch can for by touched only enabled after circuit occur moment flash, then again restore electricity
Way switch.Specifically, flash switch carries out a switch motion for the switching twice of detonator circuit on off operating mode: opening in flash
Pass is touched on time, and circuit is switched to off state by state, enables Voltage Drop or power-off；It is opened in touching by i.e. flash is terminated
When pass is released, circuit is switched on state, and voltage recovery is enabled to restore, and determines automatically alternatively, flash switch internal may be provided with
When resilient structures circuit recovery is switched on state automatically after moserial turn-off time reaches default fixed duration.Due to
Circuit disconnects and the whole process time of conducting is shorter, and therefore, flash switch is primary by the generation of rear military order circuit by touching every time
Flash.
The embodiment of the present application discloses a kind of input flash detection circuit, and shown referring to Fig.1, which includes Zero-cross comparator
Module, output resistance Ro, discharge capacity Ci, isolation optocoupler OC and switch detection module；
First input end of the first input end of zero crossing comparison module as input flash detection circuit, zero crossing comparison module
The second input terminal as input flash detection circuit the second input terminal, the output end of zero crossing comparison module respectively with output electricity
Hinder the first end of Ro, the cathode input terminal connection of isolation optocoupler OC；The second end of output resistance Ro is respectively with discharge capacity Ci's
The anode input terminal connection of first end, isolation optocoupler OC；Second input of the second end and zero crossing comparison module of discharge capacity Ci
End connection；The input terminal of switch detection module is connect with the output end of isolation optocoupler OC, switchs the output end conduct of detection module
The output end for inputting flash detection circuit, the on-off for exporting isolation optocoupler OC detect signal；Zero crossing comparison module for pair
Input signal carries out zero passage detection, and provides discharge loop in input signal zero passage for discharge capacity Ci；
If input signal Vin is direct current signal, flash occurs for the conducting phenomenon mark direct current signal of isolation optocoupler OC；If
Input signal Vin is AC signal, then when the conduction interval time of isolation optocoupler OC being greater than the signal period of AC signal, mark
Flash occurs for will AC signal.
As shown in Figure 1, input flash detection circuit provided herein, specifically using isolation optocoupler OC to electric discharge electricity
The discharge process for holding Ci is detected, to realize the detection to input signal flash phenomenon.Wherein, the input signal Vin
It can be specially AC signal, such as alternating current, then can be dodged by the first input end access firewire for inputting flash detection circuit, by input
Second input terminal of disconnected detection circuit accesses zero curve；The input signal Vin can also be specially direct current signal, then can dodge input
The positive terminal of the first input end access direct current signal of disconnected detection circuit, the second input for inputting flash detection circuit is terminated
Ground.
The zero crossing comparison module specifically using built-in reference voltage source Ref and comparator U to input signal Vin into
Row zero passage detection, and internal circuit on state can be switched in input signal Vin zero passage, it is put to be provided for discharge capacity Ci
Electrical circuit, and then realize and the flash of input signal Vin is detected.
Specifically, if the input signal Vin of input flash detection circuit is AC signal, in the electricity of input signal Vin
When pressure value is higher, discharge capacity Ci is in charged state.During this period, since B point voltage is not higher than A point voltage always, so
Luminescent device (light emitting diode shown in Fig. 1) in isolation optocoupler OC is not turned on, so that in isolation optocoupler OC
Photosensitive switch (phototriode shown in Fig. 1) is also at off state.And when input signal Vin reduces example to a certain extent
When such as zero passage, the conducting structure of zero crossing comparison module internal circuit switches, and provides discharge loop for discharge capacity Ci；At this point, by
It cannot be mutated in capacitor both end voltage, B point voltage will be above A point voltage, and discharge capacity Ci will be provided along zero crossing comparison module
Discharge loop discharge so that isolation optocoupler OC be connected, and the conducting duration of isolation optocoupler OC depend on discharge capacity
The duration of the discharge current of Ci.With the variation of input signal Vin, when input signal Vin increases again, discharge capacity
Ci restores charged state again, and isolation optocoupler OC is then still in an off state.
By above process analysis it is found that for ac input signal Vin, in one ac cycle, discharge capacity Ci
Electric discharge phenomena only occur once, that is, occur at the time of input signal Vin is reduced to a certain extent such as zero passage, therefore, accordingly
Ground, also only conducting is primary by isolation optocoupler OC, so, in the case where normal condition, that is, do not have flash, isolation optocoupler OC's
The signal period of ac input signal Vin is equal to per the adjacent interval time be connected twice.Generally, used exchange is defeated
Entering signal Vin is alternating current, signal period 20ms.Once affecting input letter however, flash has occurred in input signal Vin
The continuity of number Vin will certainly enable the conduction interval time of isolation optocoupler OC be greater than the originally fixed signal period, thus
Determine that flash has occurred in input signal Vin.
On the other hand, in normal state, defeated if the input signal Vin of input flash detection circuit is direct current signal
The voltage value for entering signal Vin is higher, and B point voltage is not higher than A point voltage always, so isolation optocoupler OC is in an off state.And
Once flash occurs for input signal Vin, then discharge capacity Ci will carry out primary of short duration discharge process during flash, with after
Also occurs primary of short duration conducting phenomenon from optocoupler OC.Accordingly, for direct-flow input signal Vin, when detecting isolation optocoupler OC
Conducting phenomenon when, that is, can determine that flash has occurred in input signal Vin.
It should also be noted that, either for ac input signal or direct-flow input signal, in above-mentioned detection process
In, since the discharge process of discharge capacity Ci can terminate quickly, the on state of isolation optocoupler OC is moment to complete switching
, isolation optocoupler OC is in off state within the most of the time, is not turned on electric current, therefore significantly reduce system function
Consumption.
In addition, those skilled in the art can voluntarily select and design the particular circuit configurations of switch detection module, as long as
Can be according to the on state of the on-off detection signal acquisition isolation optocoupler OC of its output, the application is to this and without limit
It is fixed.
Input flash detection circuit provided herein include zero crossing comparison module, output resistance Ro, discharge capacity Ci,
Isolation optocoupler OC and switch detection module；The first input end of zero crossing comparison module is defeated as input flash detection circuit first
Enter to hold, second input terminal of the second input terminal of zero crossing comparison module as input flash detection circuit, zero crossing comparison module
Output end is connect with the cathode input terminal of the first end of output resistance Ro, isolation optocoupler OC respectively；The second end of output resistance Ro
It is connect respectively with the anode input terminal of the first end of discharge capacity Ci, isolation optocoupler OC；The second end and zero passage of discharge capacity Ci
Second input terminal of comparison module connects；The input terminal of switch detection module is connect with the output end of isolation optocoupler OC, switch inspection
Output end of the output end of module as input flash detection circuit is surveyed, the on-off for exporting isolation optocoupler OC detects signal；
Zero crossing comparison module is used to carry out zero passage detection to input signal, and provides electric discharge in input signal zero passage for discharge capacity Ci
Circuit；If input signal is direct current signal, flash occurs for the conducting phenomenon mark direct current signal of isolation optocoupler OC；If input letter
Number be AC signal, then when the conduction interval time of isolation optocoupler OC be greater than AC signal signal period when, mark exchange letter
Number occur flash.
As it can be seen that input flash detection circuit provided herein, using zero crossing comparison module, discharge capacity and is isolated light
The specific connection structure of coupling so that discharge capacity is only reduced to reference voltage moment to discharge in input signal, and using every
It is detected from electric discharge phenomena of the optocoupler to discharge capacity, thus whether can be generated according to electric discharge phenomena or its periodic law divides
The flash of direct current or ac input signal Shi Xian not detected.It is led since isolation optocoupler is only in of short duration discharge process
Logical state, therefore system power dissipation is significantly reduced, effectively improve product competitiveness and economic benefit.
Referring to FIG. 2, Fig. 2 is the knot of input flash detection circuit provided herein in another specific embodiment
Structure block diagram.
As shown in Fig. 2, on the basis of the above, as a kind of preferred embodiment, the switch in the present embodiment is detected
Module includes pull-up resistor Rp and the first power Vcc；The first output end of isolation optocoupler OC passes through the electricity of pull-up resistor Rp and first
Source Vcc connection, and the output end as switch detection module, the second output terminal ground connection of isolation optocoupler OC.
Specifically, when isolation optocoupler OC is in an off state, the output of switch detection module shown in Fig. 2 is because of pull-up resistor
The effect of Rp and be high level；When isolation optocoupler OC conducting, the output of detection module is switched because the ground connection of isolation optocoupler OC is made
With and be low level.Since the conducting duration of isolation optocoupler OC is very short relative to shutdown duration, on state is corresponding
Low level is just presented as a negative pulse on waveform.
On the basis of the above, the switch detection as shown in Fig. 2, as a kind of preferred embodiment, in the present embodiment
Module further includes the protection capacitor Cs being connected between the first output end of isolation optocoupler OC and second output terminal.
As a kind of preferred embodiment, on the basis of the above, as shown in Fig. 2, the input flash in the present embodiment
Detection circuit further includes the input resistance Ri connecting with the first input end of zero crossing comparison module.As for the specific of input resistance Ri
Resistance value size, those skilled in the art designed, designed and can realize according to actual use situation, the application to this not into
Row limits.
On the basis of the above, the input flash as shown in Fig. 2, as a kind of preferred embodiment, in the present embodiment
Detection circuit further includes the voltage-stabiliser tube D being connected between the first input end of zero crossing comparison module and the second input terminal.
Specifically, settable voltage-stabiliser tube D carries out input protection to comparator U.In addition, in practical applications, comparator U and
Reference voltage source Ref can be specifically chosen related packaged integrated chip.
As a kind of preferred embodiment, as shown in Fig. 2, the capacitance of discharge capacity Ci is 56nF；The resistance value of output resistance Ro
For 1.5k Ω.
Specifically, the parameter size of discharge capacity Ci and output resistance Ro are rationally set, it can be to discharge current and electric discharge
Duration is rationally adjusted, wherein being rapidly completed for discharge process is conducive to improve detection speed and precision.
Referring to Fig. 3, the embodiment of the present application discloses a kind of circuit structure of zero crossing comparison module.The zero crossing comparison module
Including first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the first PMOS tube P1, the second PMOS tube P2,
One NMOS tube N1, the second NMOS tube N2, reference voltage source Ref, comparator U and phase inverter；
The first end of first resistor R1, the source electrode of the first PMOS tube P1, the second PMOS tube P2 source electrode, reference voltage source
The first power input of Ref homogeneously connects, and the first input end as zero crossing comparison module；The second of first resistor R1
The drain electrode at end, the first end of second resistance R2, the first PMOS tube P1 homogeneously connects；The second end of second resistance R2, third electricity
The normal phase input end of the first end, comparator U that hinder R3 homogeneously connects；The output end of reference voltage source Ref is anti-with comparator U's
The connection of phase input terminal；The drain electrode of the second end of 3rd resistor R3, the first end of the 4th resistance R4, the first NMOS tube N1 homogeneously interconnects
It connects；The grid of first PMOS tube P1, the grid of the first NMOS tube N1, the output end of comparator U, phase inverter input terminal mutually
Connection；The output end of phase inverter, the grid of the second PMOS tube P2, the second NMOS tube N2 grid homogeneously connect；2nd PMOS
The drain electrode of pipe P2 is connect with the drain electrode of the second NMOS tube N2, and the output end as zero crossing comparison module；Reference voltage source Ref's
Second source input terminal, the second end of the 4th resistance R4, the source electrode of the first NMOS tube N1, the second NMOS tube N2 source electrode mutually
Connection, and the second input terminal as zero crossing comparison module.
Specifically, reference voltage source Ref for outputting reference voltage to comparator U inverting input terminal, comparator U according to
The voltage swing relationship of its positive and negative phase input terminal exports comparison result signal.When the electricity of the input signal Vin of zero crossing comparison module
When pressing higher, comparator U exports high level, after inverted device reverse phase, the second PMOS tube P2 conducting, the second NMOS tube N2 shutdown,
Output resistance Ro and discharge capacity Ci in subsequent conditioning circuit access circuit by the second PMOS tube P2, and discharge capacity Ci is in charging
State.When the reversed zero passage of input signal Vin of zero crossing comparison module is reduced to certain threshold value and zero passage by higher voltage value
When, the output of comparator U is flipped, become low level, after inverted device reverse phase, and the second PMOS tube P2 shutdown, the 2nd NMOS
The internal circuit conducting structure that pipe N2 conducting, i.e. switching change zero crossing comparison module, enables the second PMOS tube P2 cooperate subsequent electricity
Isolation optocoupler OC in road is that discharge capacity Ci forms discharge loop, and then the isolation optocoupler OC for flowing through discharge current is enabled to lead
It is logical.
Flash on-off control system provided herein is introduced below.
Referring to Fig. 4, Fig. 4 is the knot of flash on-off control system in a specific embodiment provided by the present embodiment
Structure block diagram, including flash switch 1, rectification module 2, voltage regulating module 3, control module 4, drive module 5 and as described above
A kind of input flash detection circuit 6；
The first end of flash switch 1 for being connect with AC power source, the second end of flash switch 1 respectively with rectification module 2
It is connected with the input terminal of input flash detection circuit 6；The output end of rectification module 2 is connect with the input terminal of voltage regulating module 3, is used for
AC rectification is exported into direct current；The output end of voltage regulating module 3 is connect with the feeder ear of control module 4, for being control mould
Block 4 provides corresponding operating voltage；The feeder ear of drive module 5 is connect with the output end of rectification module 2, drive module 5 it is defeated
Outlet is connect with electrical equipment, for driving electrical equipment；The input terminal of control module 4 is defeated with input flash detection circuit 6
Outlet connection, the output end of control module 4 are connect with the input terminal of drive module 5, for defeated according to input flash detection circuit 6
On-off detection signal out determines the switching state of flash switch 1, and controls electrical equipment progress state according to switching state and cut
It changes.
Specifically, described AC power source generallys use alternating current, and flash switch 1 accesses alternating current and connecting with firewire.
Alternating current from alternating current successively after over commutation, pressure regulation, works for supplying control module 4 and drive module 5.Wherein, it controls
Molding block 4 is used to receive the on-off detection signal for the isolation optocoupler OC that input flash detection circuit 6 is exported, thus according to isolation
The conducting situation of optocoupler OC judges the action situation of flash switch 1, and then carries out state switching control to electrical equipment.Due to dodging
It disconnects and closes 1 only flash when being acted, do not continue dump, therefore subsequent conditioning circuit such as control module 4 etc. remains to
Normal power supply and work.
Since alternating current is the alternating current that frequency is 50Hz, control module 4 specifically can detect isolation optocoupler at this time
When the conduction interval duration of OC is greater than 20ms, determine that the input signal of input flash detection circuit 6 is sent out because flash switch 1 acts
Flash has been given birth to, the carry out state switching such as electrical equipment such as intelligent lamp thus can be controlled, such as specifically can be by electrical equipment by opening
It opens state switching to be in off state, or open state is switched to by closed state, or be switched to by high power state low
Power rating etc..Wherein, control module 4 specifically can control electrical equipment and sending corresponding instruction to drive module 4
Carry out state switching.
Flash on-off control system provided herein specifically uses previously described input flash detection circuit, benefit
With the specific connection structure of comparator, discharge capacity and isolation optocoupler, so that discharge capacity is only reduced to benchmark in input signal
Voltage instantaneous is discharged, and is detected using electric discharge phenomena of the isolation optocoupler to discharge capacity, thus existing using electric discharge
The periodic law of elephant is detected to whether flash switch acts, and then the switching state control electricity consumption based on flash switch is set
It is standby.Due to isolation optocoupler only in of short duration discharge process it is in the conductive state, significantly reduce system power dissipation, effectively
Ground improves product competitiveness and economic benefit.
Referring to Fig. 5, Fig. 5 is the knot of flash on-off control system provided herein in another specific embodiment
Structure block diagram.
As shown in figure 5, as a kind of preferred embodiment, flash provided by the present embodiment is opened on the basis of above content
Closing control system further includes filter module 7, and the input terminal of filter module 7 is connect with the output end of rectification module 2, filter module 7
Output end connect with the input terminal of voltage regulating module 3.
Specifically, in order to further increase the power supply quality of direct current, filter module 7 can also be set to rectification module 2
The direct current of output is filtered.
Wherein, on the basis of above content, as a kind of preferred embodiment, rectification module 2 is specially bridge rectifier module.
Certainly, those skilled in the art can also select other kinds of rectifier circuit structure according to actual use situation.
On the basis of above content, as a kind of preferred embodiment, control module 4 and drive module 5 include channel radio
Believe unit, control module 4 is specifically used for the switching state according to flash switch 1, sends the wireless of state switching to drive module
Control instruction.
Specifically, as previously mentioned, in smart home application scenarios, control module 4 is specific can also be single by wireless communication
It is first to be carried out wireless communication with matched intelligent power equipment, to complete the state switching control to electrical equipment.Wherein, described
Wireless communication unit may particularly include but be not limited to WIFI communication unit or bluetooth-communication unit.
The specific embodiment of flash on-off control system provided herein and input flash as described above are examined
Slowdown monitoring circuit can correspond to each other reference, just repeat no more here.
Each embodiment is described in a progressive manner in the application, the highlights of each of the examples are with other realities
The difference of example is applied, the same or similar parts in each embodiment may refer to each other.
It should be noted that in present specification, the relational terms of such as " first " and " second " etc are used merely to
One entity or operation and another entity or operate is distinguished, without necessarily requiring or implying these entities or
There are any actual relationship or orders between person's operation.In addition, the terms "include", "comprise" or its any other
Variant is intended to non-exclusive inclusion, so that process, circuit, article or equipment including a series of elements are not only
It including those elements, but also including other elements that are not explicitly listed, or further include for this process, circuit, object
Product or the intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...",
Be not precluded is including that there is also other identical elements in the process of the element, circuit, article or equipment.
Technical solution provided herein is described in detail above.Specific case used herein is to this Shen
Principle and embodiment please is expounded, the circuit for the application that the above embodiments are only used to help understand and its
Core concept.It should be pointed out that for those skilled in the art, in the premise for not departing from the application principle
Under, can also to the application, some improvement and modification can also be carried out, these improvement and modification are also fallen into the protection scope of the application.
Claims (10)
1. a kind of input flash detection circuit, which is characterized in that including zero crossing comparison module, output resistance, discharge capacity, isolation
Optocoupler and switch detection module；
First input end of the first input end of the zero crossing comparison module as the input flash detection circuit, the zero passage
Second input terminal of comparison module as it is described input flash detection circuit the second input terminal, the zero crossing comparison module it is defeated
Outlet is connect with the cathode input terminal of the first end of the output resistance, the isolation optocoupler respectively；The of the output resistance
Two ends are connect with the anode input terminal of the first end of the discharge capacity, the isolation optocoupler respectively；The of the discharge capacity
Two ends are connect with the second input terminal of the zero crossing comparison module；The input terminal of the switch detection module and the isolation optocoupler
Output end connection, output end of the output end of the switch detection module as the input flash detection circuit, for defeated
The on-off of the isolation optocoupler detects signal out；The zero crossing comparison module is used for input signal progress zero passage detection, and
Discharge loop is provided when the input signal zero passage for the discharge capacity；
If the input signal is direct current signal, direct current signal described in the conducting phenomenon mark of the isolation optocoupler dodges
It is disconnected；If the input signal is AC signal, it is greater than the AC signal when the conduction interval time of the isolation optocoupler
When the signal period, indicate that flash occurs for the AC signal.
2. input flash detection circuit according to claim 1, which is characterized in that the switch detection module includes pull-up
Resistance and the first power supply；
First output end of the isolation optocoupler is connect by the pull-up resistor with first power supply, and as the switch
The output end of detection module, the second output terminal ground connection of the isolation optocoupler.
3. input flash detection circuit according to claim 2, which is characterized in that the switch detection module further includes connecting
Connect the protection capacitor between the first output end and second output terminal of the isolation optocoupler.
4. input flash detection circuit according to claim 3, which is characterized in that further include and the zero crossing comparison module
First input end connection input resistance.
5. input flash detection circuit according to claim 4, which is characterized in that further include being connected to the Zero-cross comparator
Voltage-stabiliser tube between the first input end of module and the second input terminal.
6. input flash detection circuit according to any one of claims 1 to 5, which is characterized in that the Zero-cross comparator mould
Block includes first resistor, second resistance, 3rd resistor, the 4th resistance, the first PMOS tube, the second PMOS tube, the first NMOS tube,
Two NMOS tubes, reference voltage source, comparator and phase inverter；
The first end of the first resistor, the source electrode of first PMOS tube, the source electrode of second PMOS tube, benchmark electricity
First power input of potential source homogeneously connects, and the first input end as the zero crossing comparison module；First electricity
The drain electrode of the second end of resistance, the first end of the second resistance, first PMOS tube homogeneously connects；The second resistance
Second end, the first end of the 3rd resistor, the comparator normal phase input end homogeneously connect；The reference voltage source
Output end is connect with the inverting input terminal of the comparator；The second end of the 3rd resistor, the first end of the 4th resistance,
The drain electrode of first NMOS tube homogeneously connects；The grid, described of the grid of first PMOS tube, first NMOS tube
The output end of comparator, the phase inverter input terminal homogeneously connect；The output end of the phase inverter, second PMOS tube
Grid, second NMOS tube grid homogeneously connect；The drain electrode of second PMOS tube and second NMOS tube
Drain electrode connection, and the output end as the zero crossing comparison module；The second source input terminal of the reference voltage source, described
The second end of four resistance, the source electrode of first NMOS tube, second NMOS tube source electrode homogeneously connect, and as described
Second input terminal of zero crossing comparison module.
7. a kind of flash on-off control system, which is characterized in that including flash switch, rectification module, voltage regulating module, control mould
Block, drive module and such as input flash detection circuit as claimed in any one of claims 1 to 6；
The first end of flash switch for connect with AC power source, the second end that the flash switchs respectively with the rectification
Module is connected with the input terminal of the input flash detection circuit；The output end of the rectification module is defeated with the voltage regulating module
Enter end connection, for AC rectification to be exported direct current；The power supply of the output end of the voltage regulating module and the control module
End connection, for providing corresponding operating voltage for the control module；The feeder ear of the drive module and the rectification mould
The output end of block connects, and the output end of the drive module is connect with electrical equipment, for driving the electrical equipment；The control
The input terminal of molding block is connect with the output end of the input flash detection circuit, the output end of the control module and the drive
The input terminal of dynamic model block connects, described in the on-off detection signal for being exported according to the input flash detection circuit determines
The switching state of flash switch, and electrical equipment is controlled according to the switching state and carries out state switching.
8. flash on-off control system according to claim 7, which is characterized in that it further include filter module, the filtering
The input terminal of module is connect with the output end of the rectification module, and the output end of the filter module is defeated with the voltage regulating module
Enter end connection.
9. flash on-off control system according to claim 8, which is characterized in that the rectification module is specially that bridge-type is whole
Flow module.
10. flash on-off control system according to any one of claims 7 to 9, which is characterized in that the control module and
The drive module includes wireless communication unit, and the control module is specifically used for the switching switched according to the flash
State, Xiang Suoshu drive module send the wireless control directives of state switching.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910319585.6A CN109991535B (en) | 2019-04-19 | Flash switch control system and input flash detection circuit thereof | |
| PCT/CN2019/084484 WO2020211114A1 (en) | 2019-04-19 | 2019-04-26 | Flash switch control system and input flash detection circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910319585.6A CN109991535B (en) | 2019-04-19 | Flash switch control system and input flash detection circuit thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109991535A true CN109991535A (en) | 2019-07-09 |
| CN109991535B CN109991535B (en) | 2024-04-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110412977A (en) * | 2019-08-29 | 2019-11-05 | 青岛亿联客信息技术有限公司 | A kind of test device for flash control equipment |
| CN114002622A (en) * | 2021-10-28 | 2022-02-01 | 上海电气风电集团股份有限公司 | Communication detection method, system and readable storage medium |
| CN116800246A (en) * | 2023-06-09 | 2023-09-22 | 陕西星环聚能科技有限公司 | Isolation circuit and fusion shooting device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110412977A (en) * | 2019-08-29 | 2019-11-05 | 青岛亿联客信息技术有限公司 | A kind of test device for flash control equipment |
| CN114002622A (en) * | 2021-10-28 | 2022-02-01 | 上海电气风电集团股份有限公司 | Communication detection method, system and readable storage medium |
| CN114002622B (en) * | 2021-10-28 | 2024-02-27 | 上海电气风电集团股份有限公司 | Communication detection method, device and readable storage medium |
| CN116800246A (en) * | 2023-06-09 | 2023-09-22 | 陕西星环聚能科技有限公司 | Isolation circuit and fusion shooting device |
| CN116800246B (en) * | 2023-06-09 | 2024-04-09 | 陕西星环聚能科技有限公司 | Isolation circuit and fusion shooting device |
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