CN112218409A - Protection device for preventing lamp from flickering - Google Patents

Protection device for preventing lamp from flickering Download PDF

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Publication number
CN112218409A
CN112218409A CN202011002499.1A CN202011002499A CN112218409A CN 112218409 A CN112218409 A CN 112218409A CN 202011002499 A CN202011002499 A CN 202011002499A CN 112218409 A CN112218409 A CN 112218409A
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China
Prior art keywords
voltage
electrically connected
lamp
unit
current
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CN202011002499.1A
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Chinese (zh)
Inventor
王伟海
柳绪明
谷晓燕
邢润
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Shijiazhuang Zhongxin Ruierwei Technology Development Co ltd
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Shijiazhuang Zhongxin Ruierwei Technology Development Co ltd
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Priority to CN202011002499.1A priority Critical patent/CN112218409A/en
Publication of CN112218409A publication Critical patent/CN112218409A/en
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/34—Voltage stabilisation; Maintaining constant voltage
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/20—Controlling the colour of the light
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

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  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

The invention relates to the field of lamp illumination, in particular to a protection device for preventing a lamp from flickering. The mains supply access unit in the device comprises a fuse tube and a piezoresistor, and is used for safely introducing mains supply into the device and the lamp. The rectification filtering unit, the first voltage stabilizing unit and the second voltage stabilizing unit are used for converting alternating-current voltage of the mains supply into stable direct-current voltage. The signal acquisition unit is used for acquiring the working current of the lamp and the voltage parameter of the mains supply and calculating the active power of the lamp. The signal processing unit identifies the current working state of the lamp according to the parameters acquired and calculated by the signal acquisition unit and sends a command voltage signal to the signal indication unit. When the lamp runs abnormally, the signal processing unit sends a command voltage signal to the execution unit. The triode in the execution unit responds to the command voltage signal sent by the signal processing unit, so that the electromagnetic coil of the electromagnetic relay forms a loop, and the electromagnetic relay cuts off the power supply of the lamp.

Description

Protection device for preventing lamp from flickering
Technical Field
The invention relates to the field of lamp illumination, in particular to a protection device for preventing a lamp from flickering.
Background
When people use the lamp for illumination, the phenomenon of lamp flicker is often encountered, thereby greatly influencing the production and the life of people in an illumination area. The reasons for this are mainly the following. First, the voltage instability of the mains supply results in power supply interruption. Secondly, the driving module of the lamp is aged to cause the output voltage to be unstable. Thirdly, the lamp bulb is aged to cause the light emitting process to be unstable.
Disclosure of Invention
In view of this, the present invention provides a protection device for preventing lamp flicker. The device comprises a mains supply access unit, a rectification filtering unit, a first voltage stabilizing unit, a second voltage stabilizing unit, a signal acquisition unit, a signal processing unit, a signal display unit and an execution unit. The device collects the working current of the lamp and the voltage of the mains supply through the signal collection unit, and calculates the active power of the lamp. The signal processing unit identifies the current working state of the lamp according to the parameters acquired and calculated by the signal acquisition unit, and if lamp flicker, current, voltage, power fluctuation and other abnormalities occur, the signal processing unit sends a command voltage signal to the execution unit to turn off the lamp, so that lamp flicker is prevented from causing light pollution.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a protective device to prevent lamp flicker, comprising:
the input end of the commercial power access unit is electrically connected with a commercial power supply and is used for introducing the voltage of the commercial power supply into the device and the lamp;
the input end of the rectification filtering unit is electrically connected with the output end of the commercial power access unit and is used for converting the commercial power supply voltage into unidirectional pulsating direct-current voltage;
the input end of the first voltage stabilizing unit is electrically connected with the output end of the rectifying and filtering unit and is used for converting the unidirectional pulsating direct-current voltage into a stable 12V direct-current voltage;
the input end of the second voltage stabilizing unit is electrically connected with the output end of the first voltage stabilizing unit and is used for converting the 12V direct-current voltage into a stable 3.3V direct-current voltage;
a first input end of the signal acquisition unit is electrically connected with an output end of the second voltage stabilizing unit and is used for providing 3.3V direct-current working voltage for the signal acquisition unit; the second input end of the LED lamp is electrically connected with a second input end N3 of the lamp and is used for collecting the current value of the lamp; the third input end of the power supply is electrically connected with the output end of the commercial power access unit and is used for collecting the voltage value of the commercial power supply; a first output end of the lamp outputs a current signal of the lamp; the second output end outputs an active power signal of the lamp;
a first input end of the signal processing unit is electrically connected with an output end of the second voltage stabilizing unit and is used for providing 3.3V direct-current working voltage for the signal processing unit; the second input end of the signal acquisition unit is electrically connected with the first output end of the signal acquisition unit; the third input end of the signal acquisition unit is electrically connected with the second output end of the signal acquisition unit; a first output end of the lamp failure signal output module outputs a lamp failure signal; the second output end of the lamp outputs a lamp working signal; the third output end outputs an execution signal;
the signal display unit comprises a green indicator light and a red indicator light, wherein the green indicator light is electrically connected with the first output end of the signal processing unit, and the red indicator light is electrically connected with the second output end of the signal processing unit; and
the first input end of the execution unit is electrically connected with the output end of the first voltage stabilizing unit and is used for providing 12V direct current working voltage for the execution unit; the second input end of the commercial power switching-in unit is electrically connected with the output end of the commercial power switching-in unit; the third input end of the signal processing unit is electrically connected with the third output end of the signal processing unit; the first output end is electrically connected with the input end of the lamp.
Further, the utility power access unit further includes:
the first end of the fuse tube F is electrically connected with the L end of the live wire of the mains supply and is used for preventing the device and the lamp from being damaged by abnormal current of the mains supply; and
a first end of the piezoresistor RV is electrically connected with a second end of the protective tube, and an L1 wiring pin is led out; the second end of the connecting wire is electrically connected with the end N of the zero line of the mains supply, and an N1 connecting pin is led out; the device is used for preventing the device and the lamp from being damaged by abnormal voltage of the mains supply.
Further, the rectifying and filtering unit further includes:
an input end L2 of the rectifier diode D1 is electrically connected to an L1 terminal pin of the mains supply access unit, and is configured to perform half-wave rectification on a mains supply to convert a bidirectional mains supply voltage into a unidirectional pulsating direct-current voltage; and
the first filter capacitor E1 is an active capacitor, the input end of the first filter capacitor E1 is electrically connected with the output end of the rectifier diode D1, and a direct-current voltage HV wiring pin is led out; the output end of the power supply is grounded; the rectifying diode D1 is used for filtering out the alternating current component in the pulsating direct current voltage output by the rectifying diode D1.
Further, the first voltage stabilization unit further includes:
the first voltage stabilizer U1 is a three-pin non-isolated switch type voltage stabilizer, and a pin D of the first voltage stabilizer U1 is electrically connected with an HV wiring pin of the rectification filter unit and is used for introducing pulsating direct current voltage into the first voltage stabilizing unit;
a first voltage regulator circuit, a first input end of which is electrically connected to the VDD pin of the first voltage regulator U1, and a second input end of which is electrically connected to the CS pin of the first voltage regulator U1, for reducing the dc regulated voltage output by the first voltage regulator U1 to a dc regulated voltage of 12V; and
a first end of the divider resistor R2 is electrically connected with the output end of the first voltage stabilizing circuit, and a CV1 wiring pin is led out; the second end of the first switch is grounded; and the second filter capacitor E2 in the first voltage stabilizing circuit form an RC filter circuit.
Further, the second voltage stabilizing unit further includes:
the second voltage stabilizer U2 is a three-pin linear voltage stabilizer, the VIN end of the second voltage stabilizer U2 is electrically connected with the CV1 wiring pin of the first voltage stabilizing unit through a first current limiting resistor R3, the VSS end of the second voltage stabilizer U2 is grounded, and the VOUT end of the second voltage stabilizer U2 outputs 3.3V direct current stabilized voltage; and
the third filter capacitor E3 is a polar capacitor, the input end of the third filter capacitor E3 is electrically connected with the VOUT end of the second voltage stabilizer U2, and a CV2 wiring pin is led out; the output terminal is grounded.
Further, the signal acquisition unit further includes:
the power metering chip U3 is an eight-pin built-in clock single-phase socket meter metering chip, and the VDD end of the power metering chip U3 is electrically connected with the CV2 wiring pin of the second voltage stabilizing unit and is used for providing 3.3V direct-current working voltage for the operation of the power metering chip U3, and meanwhile, the VDD end is grounded through a first bypass capacitor C4; the GND end and the SEL end are both grounded; the CFi end outputs a current signal of the lamp; the CF end outputs an active power signal of the lamp;
the first input end N4 of the current acquisition circuit is electrically connected with the second input end N3 of the lamp, the second input end N2 of the current acquisition circuit is electrically connected with the N1 wiring pin of the commercial power access unit, the first output end of the current acquisition circuit is electrically connected with the IP end of the electric energy metering chip U3, and the second output end of the current acquisition circuit is electrically connected with the IN end of the electric energy metering chip U3 and is used for acquiring the working current signal of the lamp; and
voltage acquisition circuit, its first input L3 with the L1 wiring foot electric property of commercial power access unit links to each other, its second input N5 with the N1 wiring foot electric property of commercial power access unit links to each other, its output with electric energy metering chip U3's VP end electric property links to each other for gather mains power supply's voltage signal.
Further, the signal processing unit further includes:
the microcontroller U4 is an eight-pin 8-bit microcontroller, the VDD terminal of the microcontroller U4 is electrically connected with the CV2 connection pin of the second voltage stabilizing unit, and is used for providing 3.3V direct-current working voltage for the operation of the microcontroller U4, and the VDD terminal is grounded through a second bypass capacitor C5; the VSS end is grounded; the RA5 end of the electric energy meter is electrically connected with the CF end of the electric energy metering chip U3; the RA4 end of the electric energy meter is electrically connected with the CFi end of the electric energy metering chip U3; the RA0 end outputs the working signal of the lamp; the RA1 end outputs the fault signal of the lamp; the terminal RA2 outputs an execution signal.
Further, the signal display unit further includes:
the green indicator light is a green light emitting diode LEDG, the input end of the green indicator light is electrically connected with the RA0 end of the microcontroller U4 through a second current limiting resistor R12, and the output end of the green indicator light is grounded and used for indicating working signals of a lamp; and
the input end of the red indicator lamp is electrically connected with the RA1 end of the microcontroller U4 through a third current limiting resistor R13, and the output end of the red indicator lamp is grounded and used for indicating a fault signal of a lamp.
Further, the execution unit further includes:
a first coil pin of the electromagnetic relay KT is electrically connected with a CV1 wiring pin of the first voltage stabilizing unit and is used for providing 12V direct-current working voltage for the operation of an electromagnetic coil LX2 of the electromagnetic relay KT; a first load pin L4 is electrically connected with an L1 wiring pin of the mains supply access unit; the second load pin L5 is electrically connected to the first input terminal L6 of the lamp;
a triode Q, the collector of which is electrically connected with the second coil pin of the electromagnetic relay KT, the base of which is electrically connected with the RA2 end of the microcontroller U4 through a fourth current limiting resistor R14, and the emitter of which is grounded; the circuit is used for responding to an execution signal of the microcontroller U4 and controlling the electrification of an electromagnetic coil LX2 of the electromagnetic relay KT;
a freewheeling diode D4, an input terminal of which is electrically connected with the second coil pin of the electromagnetic relay KT and an output terminal of which is electrically connected with the first coil pin of the electromagnetic relay KT; after the commercial power supply is powered off, the electromagnetic relay is used for releasing the electric energy in an electromagnetic coil LX2 of the electromagnetic relay KT; and
and two ends of an arc extinguishing capacitor C9 are respectively and electrically connected with a first load pin L4 and a second load pin L5 of the electromagnetic relay, and are used for relieving peak voltage generated when the electromagnetic relay KT is connected with or disconnected from a mains supply.
Due to the adoption of the technical scheme, the invention has the technical progress that:
a protection device for preventing lamp flicker comprises a mains supply access unit, a rectification filtering unit, a first voltage stabilizing unit, a second voltage stabilizing unit, a signal acquisition unit, a signal processing unit, a signal display unit and an execution unit.
The commercial power access unit isolates other units and lamps of the device from a commercial power supply, and the other units and lamps of the device can be prevented from being damaged by abnormal current and voltage in the commercial power supply through the characteristics of the fuse tube F and the piezoresistor RV.
The first voltage stabilizer U1 in the first voltage stabilizing unit can convert the unidirectional pulsating dc voltage output by the rectifying and filtering unit into a relatively stable dc voltage with a high voltage value, and then the first voltage stabilizing unit converts the dc voltage with the high voltage value into a dc voltage of 12V. Meanwhile, two ends of a second filter capacitor E2 of the first voltage stabilizing circuit are connected with a voltage dividing resistor R2 in parallel, so that the second filter capacitor E2 and the voltage dividing resistor R2 jointly form an RC filter circuit, the discharging process of the second filter capacitor E2 is delayed, and the capability of the second filter capacitor E2 for keeping 12V direct-current voltage stable is improved.
The VIN end of the second voltage stabilizer U2 in the second voltage stabilizing unit is electrically connected with the 12V voltage output end of the first voltage stabilizing unit through the first current limiting resistor R3, so that the second voltage stabilizer U2 can be prevented from being damaged by abnormal current. The VOUT terminal of the second regulator U2 outputs a stable dc voltage of 3.3V, and is also grounded through a third filter capacitor E3. The third filter capacitor E3 not only can further filter out the alternating current component in the 3.3V direct current voltage, but also can discharge when the 3.3V direct current voltage fluctuates by utilizing the self energy storage effect, so that the 3.3V direct current voltage is more stable.
The VDD end of the electric energy metering chip U3 in the signal acquisition unit is grounded through a first bypass capacitor C4, and alternating current components in 3.3V direct current voltage input to the VDD end can be filtered out, so that the purity of the 3.3V direct current voltage is ensured, and the working stability of the electric energy metering chip U3 is improved. Meanwhile, the electric energy metering chip U3 can continuously acquire lamp current signals input by an IP end and an IN end of the electric energy metering chip U3 and mains supply voltage signals input by a VP end of the electric energy metering chip U3 according to a fixed frequency. Since the SEL terminal of the power metering chip U3 is grounded, the potential thereof is always 0, so as to ensure that the CFi terminal of the power metering chip U3 only outputs the collected lamp current signal. After the electric energy metering chip U3 is processed through operation, the current signal of the lamp is transmitted to the microcontroller U4 through the CFi end of the electric energy metering chip U3, and the active power signal of the lamp is transmitted to the microcontroller U4 through the CF end of the electric energy metering chip U.
The VDD end of the microcontroller U4 in the signal processing unit is grounded through a second bypass capacitor C5, and alternating current components in 3.3V direct current voltage input to the VDD end can be filtered out, so that the purity of the 3.3V direct current voltage is ensured, and the working stability of the microcontroller U4 is improved. An RA4 end of the microcontroller U4 receives a lamp current signal output by a CFi end of the electric energy metering chip U3, an RA5 end of the microcontroller U4 receives a lamp active power signal output by a CF end of the electric energy metering chip U3, and the running state of the lamp is judged through an integrated circuit built in the microcontroller U4. When the lamp runs normally, the RA0 end of the microcontroller U4 outputs 3.3V direct-current voltage and drives the green indicator light to light. When the lamp flickers, the RA1 end of the microcontroller U4 outputs 3.3V direct-current voltage and drives a red indicator lamp to light; meanwhile, the terminal RA2 outputs 3.3V DC voltage, and the DC voltage is added to the base of the transistor Q in the execution unit, so that the transistor Q becomes a passage. Meanwhile, the microcontroller U4 can repeat the above judgment process according to a fixed frequency, and refresh the voltage output states of the three terminals RA0, RA1 and RA2 according to a new judgment result.
An electromagnetic relay KT in the execution unit is a normally closed electromagnetic relay, a first coil pin of the electromagnetic relay KT is electrically connected with a CV1 wiring pin of the first voltage stabilizing unit, a second coil pin of the electromagnetic relay KT is electrically connected with a collector of a triode Q, and an emitter of the triode Q is grounded. When the RA2 end of the microcontroller U4 does not output 3.3V of dc voltage, the triode Q is in an open circuit state, so that the electromagnetic coil LX2 of the electromagnetic relay KT cannot form a loop, the switch of the electromagnetic relay KT is not sucked up, and the lamp is in a power supply state. When the RA2 end of the microcontroller U4 outputs 3.3V of direct-current voltage, the triode Q is in a closed state, so that the electromagnetic coil LX2 of the electromagnetic relay KT forms a loop, the switch of the electromagnetic relay KT is attracted, and the lamp is in a power-off state.
When the end RA2 of the microcontroller U4 suddenly interrupts 3.3V of direct current voltage, the triode Q is changed from a closed circuit state to an open circuit state, so that the electromagnetic coil LX2 of the electromagnetic relay KT is changed from a closed circuit state to an open circuit state, and the residual electric energy in the electromagnetic coil LX2 is released through the freewheeling diode D4 connected with the electromagnetic coil LX2 in parallel, so that the electromagnetic coil LX2 is prevented from being damaged.
The switch of the electromagnetic relay KT can generate peak voltage at the opening and closing moment, and the arc extinguishing capacitor C9 connected in parallel with the switch can relieve the peak voltage, so that the burning corrosion phenomenon of the node of the electromagnetic relay KT is relieved.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
the device is adopted to supply power to the lamp, so that the lamp can be prevented from being damaged by abnormal current and voltage in the mains supply, the working current of the lamp and the voltage parameter of the mains supply can be collected according to a certain frequency, and the working state of the lamp is judged. And when the lamp has the abnormalities such as flicker, current, voltage and power abnormality, the lamp is turned off, so that the lamp flicker is prevented from causing light pollution. Meanwhile, the device can repeat the judgment process according to a certain frequency, and makes corresponding action again on the running state of the lamp.
The above description is only illustrative of the technical solutions and not restrictive.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
FIG. 1 is a functional block diagram of the present invention;
fig. 2 is a schematic circuit diagram of a commercial power access unit according to the present invention;
FIG. 3 is a schematic circuit diagram of a rectifying and filtering unit according to the present invention;
FIG. 4 is a schematic circuit diagram of a first voltage stabilization unit according to the present invention;
FIG. 5 is a schematic circuit diagram of a second voltage stabilization unit according to the present invention;
FIG. 6 is a schematic diagram of a circuit structure of a signal acquisition unit according to the present invention;
FIG. 7 is a circuit diagram of a signal processing unit according to the present invention;
FIG. 8 is a circuit diagram of a signal display unit according to the present invention;
FIG. 9 is a circuit diagram of an execution unit according to the present invention;
FIG. 10 is a schematic view of a wiring structure of the lamp of the present invention;
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system architectures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
The invention provides a protection device for preventing a lamp from flickering, which can be known from the attached figure 1 of the specification, and comprises:
and the input end of the commercial power access unit is electrically connected with a commercial power supply and is used for introducing the voltage of the commercial power supply into the device and the lamp. When abnormal current and voltage occur in the mains supply, the device and the lamp can be prevented from being damaged.
And the input end of the rectification filtering unit is electrically connected with the output end of the commercial power access unit and is used for converting the voltage of the commercial power supply into unidirectional pulsating direct-current voltage.
And the input end of the first voltage stabilizing unit is electrically connected with the output end of the rectifying and filtering unit and is used for converting the unidirectional pulsating direct-current voltage into a stable 12V direct-current voltage.
And the input end of the second voltage stabilizing unit is electrically connected with the output end of the first voltage stabilizing unit and is used for converting the 12V direct current voltage into stable 3.3V direct current voltage.
The first input end of the signal acquisition unit is electrically connected with the output end of the second voltage stabilizing unit and is used for providing 3.3V direct-current working voltage for the signal acquisition unit; the second input end of the LED lamp is electrically connected with a second input end N3 of the lamp and is used for collecting the current value of the lamp; the third input end of the power supply is electrically connected with the output end of the commercial power access unit and is used for collecting the voltage value of the commercial power supply; a first output end of the lamp outputs a current signal of the lamp; and the second output end outputs an active power signal of the lamp.
The first input end of the signal processing unit is electrically connected with the output end of the second voltage stabilizing unit and is used for providing 3.3V direct-current working voltage for the signal processing unit; the second input end of the signal acquisition unit is electrically connected with the first output end of the signal acquisition unit; the third input end of the signal acquisition unit is electrically connected with the second output end of the signal acquisition unit; a first output end of the lamp failure signal output module outputs a lamp failure signal; the second output end of the lamp outputs a lamp working signal; and a third output terminal thereof outputs an execution signal.
And the signal display unit comprises a green indicator light and a red indicator light, wherein the green indicator light is electrically connected with the first output end of the signal processing unit, and the red indicator light is electrically connected with the second output end of the signal processing unit.
The first input end of the execution unit is electrically connected with the output end of the first voltage stabilizing unit and is used for providing 12V direct-current working voltage for the execution unit; the second input end of the controller is electrically connected with the output end of the commercial power access unit; the third input end of the signal processing unit is electrically connected with the third output end of the signal processing unit; the first output end is electrically connected with the input end of the lamp.
As an embodiment, referring to fig. 2, the mains access unit further includes:
the first end of the fuse tube F with the model number of T5A/250V is electrically connected with the L end of the live wire of the mains supply, and the fuse tube F is used for preventing the mains supply from generating abnormal current to damage the device and the lamp.
A piezoresistor RV with the model number of 7D471, wherein the first end of the piezoresistor RV is electrically connected with the second end of the protective tube, and an L1 wiring pin is led out; the second end of the connecting wire is electrically connected with the end N of the zero line of the mains supply, and an N1 connecting pin is led out; the device is used for preventing the device and the lamp from being damaged by abnormal voltage of the mains supply.
In this embodiment, as shown in fig. 2 and 3, the rectifying and filtering unit further includes:
the input end L2 of the rectifying diode D1 of model M7 is electrically connected to the L1 connection pin of the mains supply access unit, and is used for performing half-wave rectification on the mains supply to convert the bidirectional mains supply voltage into unidirectional pulsating dc voltage.
The input end of the first filter capacitor E1 with the polarity and the capacity of 1 muF is electrically connected with the output end of the rectifier diode, and a direct-current voltage HV wiring pin is led out; the output end of the power supply is grounded; the rectifying diode D1 is used for filtering out the ac component in the pulsating dc voltage output from the rectifying diode D1, and at the same time, the pulsating dc voltage is smoother.
In this embodiment, as shown in fig. 3 and 4, the first voltage stabilizing unit further includes:
the first voltage stabilizer U1 is a three-pin non-isolated switch type voltage stabilizer with the model number of KP3110, and a pin D of the first voltage stabilizer U1 is electrically connected with an HV wiring pin of the rectifying and filtering unit and used for introducing pulsating direct current voltage into the first voltage stabilizing unit.
The first input end of the first voltage stabilizing circuit is electrically connected with the VDD pin of the first voltage stabilizer U1, and the second input end of the first voltage stabilizing circuit is electrically connected with the CS pin of the first voltage stabilizer U1, so as to reduce the dc stabilizing voltage output by the first voltage stabilizer U1 to 12V.
A first end of the divider resistor R2 with the resistance value of 3.3 Komega is electrically connected with the output end of the first voltage stabilizing circuit, and a CV1 wiring pin is led out; the second terminal of which is grounded. The voltage dividing resistor R2 and a second filter capacitor E2 in the first voltage stabilizing circuit form an RC filter circuit, wherein the capacity of the second filter capacitor E2 is 220 muF, the RC filter circuit not only can further filter alternating current components in 12V direct current voltage, but also can discharge when the 12V direct current voltage fluctuates by utilizing the self energy storage effect, so that the 12V direct current voltage is more stable. The voltage dividing resistor R2 can delay the discharging process of the second filter capacitor E2, and the capability of the second filter capacitor E2 for stabilizing 12V direct-current voltage is further improved.
In this embodiment, as shown in fig. 4 and 5, the second voltage stabilizing unit further includes:
a VIN end of the second voltage stabilizer U2, namely a three-pin linear voltage stabilizer with the model number of ME6208A33, is electrically connected with a CV1 wiring pin of the first voltage stabilizing unit through a first current limiting resistor R3 with the resistance value of 100 omega so as to prevent the second voltage stabilizer U2 from being damaged by abnormal current; the VSS end is grounded, and the VOUT end outputs 3.3V direct current stable voltage;
the input end of the polar third filter capacitor E3 with the capacity of 100 muF is electrically connected with the VOUT end of the second voltage stabilizer U2, and a CV2 wiring pin is led out; the output terminal is grounded. The third filter capacitor E3 not only can further filter out the alternating current component in the 3.3V direct current voltage, but also can discharge when the 3.3V direct current voltage fluctuates by utilizing the self energy storage effect, so that the 3.3V direct current voltage is more stable.
In this embodiment, as shown in fig. 2, 5, 6, and 10, the signal acquisition unit further includes:
the power metering chip U3 is an eight-pin built-in clock single-phase socket meter metering chip with the model number of BL0937, and the VDD end of the power metering chip U3 is electrically connected with a CV2 wiring pin of the second voltage stabilizing unit and is used for providing 3.3V direct-current working voltage for the operation of the power metering chip; meanwhile, the VDD terminal is grounded through a first bypass capacitor C4 with the capacity of 0.1 muF, so that the alternating current component in the 3.3V direct current voltage input to the VDD terminal can be filtered out, and the purity of the 3.3V direct current voltage is ensured. The GND end and the SEL end of the electric energy metering chip U3 are both grounded, the CFi end of the electric energy metering chip U3 outputs a current signal of the lamp, and the CF end of the electric energy metering chip U3 outputs an active power signal of the lamp.
The first input end N4 of the current acquisition circuit is electrically connected with the second input end N3 of the lamp, the second input end N2 of the current acquisition circuit is electrically connected with the N1 wiring pin of the commercial power access unit, the first output end of the current acquisition circuit is electrically connected with the IP end of the electric energy metering chip U3, and the second output end of the current acquisition circuit is electrically connected with the IN end of the electric energy metering chip U3, so that the current acquisition circuit is used for acquiring the working current signal of the lamp.
And a first input end L3 of the voltage acquisition circuit is electrically connected with an L1 wiring pin of the mains supply access unit, a second input end N5 of the voltage acquisition circuit is electrically connected with an N1 wiring pin of the mains supply access unit, and an output end of the voltage acquisition circuit is electrically connected with a VP end of the electric energy metering chip U3 and is used for acquiring a voltage signal of the mains supply.
In this embodiment, as shown in fig. 5, 6, and 7, the signal processing unit further includes:
the microcontroller U4 is an eight-pin 8-bit microcontroller with the model number of 12F1501, and the VDD end of the microcontroller U4 is electrically connected with a CV2 wiring pin of the second voltage stabilizing unit and is used for providing 3.3V direct-current working voltage for the operation of the microcontroller U4; meanwhile, the VDD terminal is grounded through a second bypass capacitor C5 with the capacity of 0.1 muF, so that the alternating current component in the 3.3V direct current voltage input to the VDD terminal can be filtered out, and the purity of the 3.3V direct current voltage is ensured. The VSS end of the microcontroller U4 is grounded, the RA5 end of the microcontroller U4 is electrically connected with the CF end of the electric energy metering chip U3, the RA4 end of the microcontroller U5 is electrically connected with the CFi end of the electric energy metering chip U3, the RA0 end of the microcontroller U3578 outputs a working signal of a lamp, the RA1 end of the microcontroller U2 outputs a fault signal of the lamp, and the RA2 end of the microcontroller U2 outputs an execution signal.
In this embodiment, as shown in fig. 7 and 8, the signal display unit further includes:
the green indicating lamp is a green light emitting diode LEDG, the input end of the green indicating lamp is electrically connected with the RA0 end of the microcontroller U4 through a second current limiting resistor R12 with the resistance value of 2.2K omega, and the output end of the green indicating lamp is grounded and used for indicating working signals of the lamp.
The red indicator light is a red light emitting diode LEDR, the input end of the red indicator light is electrically connected with the RA1 end of the microcontroller U4 through a third current limiting resistor R13 with the resistance value of 2.2K omega, and the output end of the red indicator light is grounded and used for indicating a fault signal of the light.
In this embodiment, as shown in fig. 2, 4, 7, 9, and 10, the execution unit further includes:
the normally open type electromagnetic relay KT is JQC-3FF-012-1ZST, and a first coil pin of the normally open type electromagnetic relay KT is electrically connected with a CV1 connection pin of a first voltage stabilizing unit and is used for providing 12V direct current working voltage for the operation of an electromagnetic coil LX2 of the electromagnetic relay KT; a first load pin L4 is electrically connected with an L1 wiring pin of the mains supply access unit; the second load pin L5 is electrically connected to the first input terminal L6 of the lamp.
A triode Q, the collector of which is electrically connected with the second coil pin of the electromagnetic relay KT, the base of which is electrically connected with the RA2 end of the microcontroller U4 through a fourth current limiting resistor R14 with the resistance value of 2.2K omega, and the emitter of which is grounded; the electromagnetic coil LX2 is used for responding to an execution signal of the microcontroller U4 and controlling the electrification of the electromagnetic coil LX2 of the electromagnetic relay KT;
a fly-wheel diode D4 with the model number of M7, the input end of which is electrically connected with a second coil pin of the electromagnetic relay KT, and the output end of which is electrically connected with a first coil pin of the electromagnetic relay KT; after the commercial power supply is cut off, the electromagnetic coil LX2 of the electromagnetic relay KT is used for releasing the electric energy.
Two ends of an arc extinguishing capacitor C9 with the capacity of 1nF are respectively and electrically connected with a first load pin L4 and a second load pin L5 of the electromagnetic relay, and the arc extinguishing capacitor C9 is used for relieving peak voltage generated when the electromagnetic relay KT is connected or disconnected with a mains supply, so that the burning erosion phenomenon of the node of the electromagnetic relay KT is reduced.
It is noted that, in the present patent application, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Furthermore, the terms "comprises," comprising, "or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus, and the phrase" comprising a.once.a.limited element does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.

Claims (9)

1. A protection device for preventing lamp flicker, comprising:
the input end of the commercial power access unit is electrically connected with a commercial power supply and is used for introducing the voltage of the commercial power supply into the device and the lamp;
the input end of the rectification filtering unit is electrically connected with the output end of the commercial power access unit and is used for converting the commercial power supply voltage into unidirectional pulsating direct-current voltage;
the input end of the first voltage stabilizing unit is electrically connected with the output end of the rectifying and filtering unit and is used for converting the unidirectional pulsating direct-current voltage into a stable 12V direct-current voltage;
the input end of the second voltage stabilizing unit is electrically connected with the output end of the first voltage stabilizing unit and is used for converting the 12V direct-current voltage into a stable 3.3V direct-current voltage;
a first input end of the signal acquisition unit is electrically connected with an output end of the second voltage stabilizing unit and is used for providing 3.3V direct-current working voltage for the signal acquisition unit; the second input end of the LED lamp is electrically connected with a second input end N3 of the lamp and is used for collecting the current value of the lamp; the third input end of the power supply is electrically connected with the output end of the commercial power access unit and is used for collecting the voltage value of the commercial power supply; a first output end of the lamp outputs a current signal of the lamp; the second output end outputs an active power signal of the lamp;
a first input end of the signal processing unit is electrically connected with an output end of the second voltage stabilizing unit and is used for providing 3.3V direct-current working voltage for the signal processing unit; the second input end of the signal acquisition unit is electrically connected with the first output end of the signal acquisition unit; the third input end of the signal acquisition unit is electrically connected with the second output end of the signal acquisition unit; a first output end of the lamp failure signal output module outputs a lamp failure signal; the second output end of the lamp outputs a lamp working signal; the third output end outputs an execution signal;
the signal display unit comprises a green indicator light and a red indicator light, wherein the green indicator light is electrically connected with the first output end of the signal processing unit, and the red indicator light is electrically connected with the second output end of the signal processing unit; and
the first input end of the execution unit is electrically connected with the output end of the first voltage stabilizing unit and is used for providing 12V direct current working voltage for the execution unit; the second input end of the commercial power switching-in unit is electrically connected with the output end of the commercial power switching-in unit; the third input end of the signal processing unit is electrically connected with the third output end of the signal processing unit; the first output end is electrically connected with the input end of the lamp.
2. The protection device of claim 1, wherein the mains access unit further comprises:
the first end of the fuse tube F is electrically connected with the L end of the live wire of the mains supply and is used for preventing the device and the lamp from being damaged by abnormal current of the mains supply; and
a first end of the piezoresistor RV is electrically connected with a second end of the protective tube, and an L1 wiring pin is led out; the second end of the connecting wire is electrically connected with the end N of the zero line of the mains supply, and an N1 connecting pin is led out; the device is used for preventing the device and the lamp from being damaged by abnormal voltage of the mains supply.
3. The protection device for preventing the flickering of the lamp according to claim 2, wherein the rectifying and filtering unit further comprises:
an input end L2 of the rectifier diode D1 is electrically connected to an L1 terminal pin of the mains supply access unit, and is configured to perform half-wave rectification on a mains supply to convert a bidirectional mains supply voltage into a unidirectional pulsating direct-current voltage; and
the first filter capacitor E1 is an active capacitor, the input end of the first filter capacitor E1 is electrically connected with the output end of the rectifier diode D1, and a direct-current voltage HV wiring pin is led out; the output end of the power supply is grounded; the rectifying diode D1 is used for filtering out the alternating current component in the pulsating direct current voltage output by the rectifying diode D1.
4. The protection device for preventing the flickering of the lamp according to claim 3, wherein the first voltage stabilization unit further comprises:
the first voltage stabilizer U1 is a three-pin non-isolated switch type voltage stabilizer, and a pin D of the first voltage stabilizer U1 is electrically connected with an HV wiring pin of the rectification filter unit and is used for introducing pulsating direct current voltage into the first voltage stabilizing unit;
a first voltage regulator circuit, a first input end of which is electrically connected to the VDD pin of the first voltage regulator U1, and a second input end of which is electrically connected to the CS pin of the first voltage regulator U1, for reducing the dc regulated voltage output by the first voltage regulator U1 to a dc regulated voltage of 12V; and
a first end of the divider resistor R2 is electrically connected with the output end of the first voltage stabilizing circuit, and a CV1 wiring pin is led out; the second end of the first switch is grounded; and the second filter capacitor E2 in the first voltage stabilizing circuit form an RC filter circuit.
5. The protection device for preventing the flickering of the lamp according to claim 4, wherein the second voltage stabilization unit further comprises:
the second voltage stabilizer U2 is a three-pin linear voltage stabilizer, the VIN end of the second voltage stabilizer U2 is electrically connected with the CV1 wiring pin of the first voltage stabilizing unit through a first current limiting resistor R3, the VSS end of the second voltage stabilizer U2 is grounded, and the VOUT end of the second voltage stabilizer U2 outputs 3.3V direct current stabilized voltage; and
the third filter capacitor E3 is a polar capacitor, the input end of the third filter capacitor E3 is electrically connected with the VOUT end of the second voltage stabilizer U2, and a CV2 wiring pin is led out; the output terminal is grounded.
6. The protection device for preventing the flickering of the lamp according to claim 5, wherein the signal acquisition unit further comprises:
the power metering chip U3 is an eight-pin built-in clock single-phase socket meter metering chip, and the VDD end of the power metering chip U3 is electrically connected with the CV2 wiring pin of the second voltage stabilizing unit and is used for providing 3.3V direct-current working voltage for the operation of the power metering chip U3, and meanwhile, the VDD end is grounded through a first bypass capacitor C4; the GND end and the SEL end are both grounded; the CFi end outputs a current signal of the lamp; the CF end outputs an active power signal of the lamp;
the first input end N4 of the current acquisition circuit is electrically connected with the second input end N3 of the lamp, the second input end N2 of the current acquisition circuit is electrically connected with the N1 wiring pin of the commercial power access unit, the first output end of the current acquisition circuit is electrically connected with the IP end of the electric energy metering chip U3, and the second output end of the current acquisition circuit is electrically connected with the IN end of the electric energy metering chip U3 and is used for acquiring the working current signal of the lamp; and
voltage acquisition circuit, its first input L3 with the L1 wiring foot electric property of commercial power access unit links to each other, its second input N5 with the N1 wiring foot electric property of commercial power access unit links to each other, its output with electric energy metering chip U3's VP end electric property links to each other for gather mains power supply's voltage signal.
7. The protection device for preventing the flickering of the lamp according to claim 6, wherein the signal processing unit further comprises:
the microcontroller U4 is an eight-pin 8-bit microcontroller, the VDD terminal of the microcontroller U4 is electrically connected with the CV2 connection pin of the second voltage stabilizing unit, and is used for providing 3.3V direct-current working voltage for the operation of the microcontroller U4, and the VDD terminal is grounded through a second bypass capacitor C5; the VSS end is grounded; the RA5 end of the electric energy meter is electrically connected with the CF end of the electric energy metering chip U3; the RA4 end of the electric energy meter is electrically connected with the CFi end of the electric energy metering chip U3; the RA0 end outputs the working signal of the lamp; the RA1 end outputs the fault signal of the lamp; the terminal RA2 outputs an execution signal.
8. The protection device for preventing the flickering of the lamp according to claim 7, wherein the signal display unit further comprises:
the green indicator light is a green light emitting diode LEDG, the input end of the green indicator light is electrically connected with the RA0 end of the microcontroller U4 through a second current limiting resistor R12, and the output end of the green indicator light is grounded and used for indicating working signals of a lamp; and
the input end of the red indicator lamp is electrically connected with the RA1 end of the microcontroller U4 through a third current limiting resistor R13, and the output end of the red indicator lamp is grounded and used for indicating a fault signal of a lamp.
9. The protection device for preventing the flickering of the lamp according to claim 8, wherein the execution unit further comprises:
a first coil pin of the electromagnetic relay KT is electrically connected with a CV1 wiring pin of the first voltage stabilizing unit and is used for providing 12V direct-current working voltage for the operation of an electromagnetic coil LX2 of the electromagnetic relay KT; a first load pin L4 is electrically connected with an L1 wiring pin of the mains supply access unit; the second load pin L5 is electrically connected to the first input terminal L6 of the lamp;
a triode Q, the collector of which is electrically connected with the second coil pin of the electromagnetic relay KT, the base of which is electrically connected with the RA2 end of the microcontroller U4 through a fourth current limiting resistor R14, and the emitter of which is grounded; the circuit is used for responding to an execution signal of the microcontroller U4 and controlling the electrification of an electromagnetic coil LX2 of the electromagnetic relay KT;
a freewheeling diode D4, an input terminal of which is electrically connected with the second coil pin of the electromagnetic relay KT and an output terminal of which is electrically connected with the first coil pin of the electromagnetic relay KT; after the commercial power supply is powered off, the electromagnetic relay is used for releasing the electric energy in an electromagnetic coil LX2 of the electromagnetic relay KT; and
and two ends of an arc extinguishing capacitor C9 are respectively and electrically connected with a first load pin L4 and a second load pin L5 of the electromagnetic relay, and are used for relieving peak voltage generated when the electromagnetic relay KT is connected with or disconnected from a mains supply.
CN202011002499.1A 2020-09-22 2020-09-22 Protection device for preventing lamp from flickering Pending CN112218409A (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008025237A1 (en) * 2006-08-23 2008-03-06 Mile Marker (Shenzhen) Limited Motor control device and its control method
CN104039059A (en) * 2013-03-06 2014-09-10 深圳市海洋王照明工程有限公司 Fault display circuit and lamp
CN104039055A (en) * 2014-06-25 2014-09-10 何祥喜 Dual-purpose intelligent control circuit for lamp
CN104582181A (en) * 2015-01-08 2015-04-29 达诺尔电气(集团)有限公司 Lamp information collecting control device
CN105406441A (en) * 2015-12-15 2016-03-16 陈泽 Power ground fault protection circuit
CN109361169A (en) * 2018-12-21 2019-02-19 益和电气集团股份有限公司 A kind of switch cabinet status comprehensive indicator and state indication method
CN209930557U (en) * 2018-12-29 2020-01-10 浙江阳光城市照明工程有限公司 Driver circuit of LED lamp

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008025237A1 (en) * 2006-08-23 2008-03-06 Mile Marker (Shenzhen) Limited Motor control device and its control method
CN104039059A (en) * 2013-03-06 2014-09-10 深圳市海洋王照明工程有限公司 Fault display circuit and lamp
CN104039055A (en) * 2014-06-25 2014-09-10 何祥喜 Dual-purpose intelligent control circuit for lamp
CN104582181A (en) * 2015-01-08 2015-04-29 达诺尔电气(集团)有限公司 Lamp information collecting control device
CN105406441A (en) * 2015-12-15 2016-03-16 陈泽 Power ground fault protection circuit
CN109361169A (en) * 2018-12-21 2019-02-19 益和电气集团股份有限公司 A kind of switch cabinet status comprehensive indicator and state indication method
CN209930557U (en) * 2018-12-29 2020-01-10 浙江阳光城市照明工程有限公司 Driver circuit of LED lamp

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Application publication date: 20210112