CN111707865A - Intelligent lamp switch detection circuit and implementation method thereof - Google Patents
Intelligent lamp switch detection circuit and implementation method thereof Download PDFInfo
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- CN111707865A CN111707865A CN202010708766.0A CN202010708766A CN111707865A CN 111707865 A CN111707865 A CN 111707865A CN 202010708766 A CN202010708766 A CN 202010708766A CN 111707865 A CN111707865 A CN 111707865A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/2506—Arrangements for conditioning or analysing measured signals, e.g. for indicating peak values ; Details concerning sampling, digitizing or waveform capturing
- G01R19/2509—Details concerning sampling, digitizing or waveform capturing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16576—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing DC or AC voltage with one threshold
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/17—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values giving an indication of the number of times this occurs, i.e. multi-channel analysers
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses an intelligent lamp switch detection circuit, which comprises an AC/DC power supply circuit and an AC sampling circuit, wherein the input ends of the AC/DC power supply circuit and the AC sampling circuit are both connected with a mains supply, the output end of the AC/DC power supply circuit is respectively connected with a DC voltage reduction and stabilization circuit and the input end of a DC/DC dimming circuit, the output end of the AC sampling circuit is connected with the input end of a photoelectric isolation circuit, the photoelectric isolation circuit and the DC voltage reduction and stabilization circuit are both connected with a control circuit, and the output end of the DC/DC dimming circuit is connected with the input end of an LED light source; the invention also discloses an implementation method of the intelligent lamp switch detection circuit. The invention detects the pulse width signal of the commercial power, and the switch detection of the intelligent lamp is not influenced by the discharge time of the driving power supply in the intelligent lamp; the intelligent lamp on-off detection precision is higher, and the millisecond-level lamp on-off detection is realized; compared with an ADC (analog to digital converter) switch detection method, the method has the advantages of lower cost and less occupied resources for a control system.
Description
Technical Field
The invention belongs to the technical field of detection of intelligent lamp switches, and particularly relates to an intelligent lamp switch detection circuit and an implementation method thereof.
Background
The intelligent LED lamp supports APP, an intelligent sound box, sensor linkage and other control means. The traditional switch control is changed, and the purpose of controlling lighting according to needs is achieved. The following use scenes need the power supply of the switch lamp to be matched with the microprocessor inside the intelligent lamp for realization: in practical application of the intelligent lamp, the intelligent lamp can normally work only by restoring the intelligent lamp to a factory state and then re-distributing the network due to the problems of network distribution information loss and configuration information error caused by improper operation of a user; the traditional lamp switch control is considered, and the control of segmented dimming is added in the switch control; after the power is off, the intelligent lamp is in an off-line network-off state, and a user is timely reminded in the power-off state. At present, the method is mainly realized by a method of detecting the power-on time and counting the times through a quick switch of a physical switch and sampling the voltage at the moment of power-on and power-off through an ADC (analog-to-digital converter).
The factory reset of the intelligent lamp is realized by a method of detecting the power-on time and counting the times through a quick switch of a physical switch and sampling the voltage at the moment of power-on and power-off through an ADC (analog-to-digital converter). However, in practical applications, the above two methods still have the following problems:
1. the intelligent lamp is internally provided with the wireless communication SOC and the microprocessor, the ripple requirement on power supply is high, and the filter capacitor needs to be increased for the driving power supply. Therefore, the method for restoring the factory settings through the on-off detection of the physical switch depends on the discharge time of the power supply, and if the discharge time is too long, the power-off time of the physical switch is prolonged to ensure that the wireless communication SOC and the microprocessor are sufficiently powered off. If the control on the discharging time is not good, the switch detection is not accurate, the expected effect cannot be achieved, and the operation experience of a user is influenced;
2. in order to solve the problem of too long discharge time, a conventional solution is to add discharge resistors in the front and rear stages of the power supply terminals of the wireless communication SOC and the microprocessor. When the power is cut off, the residual electric quantity is quickly released through the discharge resistor. However, the discharge resistor is added, so that the efficiency of the whole lamp is reduced, and the standby power consumption is increased.
3. The switch is combined with the ADC power supply voltage sampling method, so that accurate voltage collection can be realized, and the switch can be collected. However, the circuit is complex, and the microprocessor resources are occupied greatly.
Disclosure of Invention
The present invention is directed to a detection circuit for an intelligent light switch, so as to solve the problems mentioned in the background art. The intelligent lamp switch detection circuit provided by the invention has the characteristic that the switch detection of the intelligent lamp is not influenced by the discharge time of the driving power supply in the intelligent lamp.
The invention also aims to provide a realization method of the intelligent lamp switch detection circuit.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an intelligence lamp switch detection circuitry, including AC/DC power supply circuit and AC sampling circuit, wherein, AC/DC power supply circuit and AC sampling circuit's input all is connected with the commercial power, AC/DC power supply circuit's output is connected with DC step-down voltage stabilizing circuit and DC/DC dimming circuit's input respectively, AC sampling circuit's output is connected with photoelectric isolation circuit's input, photoelectric isolation circuit and DC step-down voltage stabilizing circuit all are connected with control circuit, DC/DC dimming circuit's output is connected with the input of LED light source.
Further, the AC sampling circuit includes a resistor R2, a resistor R3, and a diode D1, wherein one end of the resistor R2 is connected to the live line L of the utility power, the other end of the resistor R2 is connected to the resistor R3, the other end of the resistor R3 is connected to the diode D1, and the other end of the diode D1 is connected to the photo-isolation circuit.
In the invention, the photoelectric isolation circuit further comprises a photoelectric coupler U1, wherein a pin 1 of the photoelectric coupler U1 is connected with a diode D1, a pin 2 of the photoelectric coupler U1 is connected with a zero line N of commercial power, and a pin 3 of the photoelectric coupler U1 is connected with a ground terminal.
In the invention, the 4 feet of the photocoupler U1 is connected with the resistor R1 and the control circuit, and the other end of the resistor R1 is connected with the DC voltage reduction and stabilization circuit.
In the invention, the output end of the DC voltage reduction and stabilization circuit is connected with a capacitor C2, and the other end of the capacitor C2 is grounded.
Further in the present invention, the control circuit is an MCU or a wireless SOC.
Further, in the invention, the output voltage of the DC voltage reduction and stabilization circuit is 3.3V.
Further in the present invention, the wireless SOC is a bluetooth chip.
Further, the method for implementing the intelligent lamp switch detection circuit comprises the following steps:
the AC sampling circuit is connected with a mains supply, and is connected with the photoelectric isolation circuit after acquiring the alternating current sinusoidal signal after voltage reduction;
converting the level signal into a level signal through a photoelectric isolation circuit and then connecting the level signal with a level detection IO port of a control circuit;
thirdly, the output end of the DC voltage reduction and stabilization circuit is connected with a capacitor C1, so that the intelligent lamp can still work after being powered off;
fourthly, detecting the power-on and power-off time through pulse width detection of the control circuit, storing the response mark in an internal Flash and accumulating the response mark;
and fifthly, executing a corresponding working mode after the time sequences of power-on and power-off are accumulated to a preset value.
Further, in the present invention, the method for implementing the intelligent lamp switch detection circuit includes that the AC sampling circuit includes a resistor R2, a resistor R3 and a diode D1, wherein one end of the resistor R2 is connected to a live wire L of the utility power, the other end of the resistor R2 is connected to a resistor R3, the other end of the resistor R3 is connected to a diode D1, the other end of the diode D1 is connected to a photoelectric isolation circuit, the photoelectric isolation circuit includes a photocoupler U1, a pin 1 of the photocoupler U1 is connected to a diode D1, a pin 2 of the photocoupler U1 is connected to a neutral wire N of the utility power, a pin 3 of the photocoupler U1 is connected to a ground terminal, a pin 4 of the photocoupler U1 is connected to a resistor R1 and a control circuit, the other end of the resistor R1 is connected to a DC step-down voltage regulator circuit, an output end of the DC voltage regulator circuit is connected to a capacitor C2, the other end of the capacitor C2, the output voltage of the DC voltage reduction and stabilization circuit is 3.3V, and the wireless SOC is a Bluetooth chip.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention detects the pulse width signal of the commercial power, and the switch detection of the intelligent lamp is not influenced by the discharge time of the driving power supply in the intelligent lamp;
2. the intelligent lamp on-off detection precision is higher, and the millisecond-level lamp on-off detection is realized;
3. compared with an ADC (analog to digital converter) switch detection method, the method has the advantages of lower cost and less occupied resources for a control system.
Drawings
FIG. 1 is a schematic circuit diagram of the present invention;
FIG. 2 is a schematic diagram of an AC sampling circuit and a photo-isolation circuit according to the present invention;
FIG. 3 is a flow chart of the detection control of the power switch of the intelligent lamp according to the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
Referring to fig. 1-3, the present invention provides the following technical solutions: the utility model provides an intelligence lamp switch detection circuitry, including AC/DC power supply circuit and AC sampling circuit, wherein, AC/DC power supply circuit and AC sampling circuit's input all is connected with the commercial power, AC/DC power supply circuit's output is connected with DC step-down voltage stabilizing circuit and DC/DC dimming circuit's input respectively, AC sampling circuit's output is connected with photoelectric isolation circuit's input, photoelectric isolation circuit and DC step-down voltage stabilizing circuit all are connected with control circuit, DC/DC dimming circuit's output is connected with the input of LED light source.
Further, the AC sampling circuit includes a resistor R2, a resistor R3, and a diode D1, wherein one end of the resistor R2 is connected to the live line L of the utility power, the other end of the resistor R2 is connected to the resistor R3, the other end of the resistor R3 is connected to the diode D1, and the other end of the diode D1 is connected to the photo-isolation circuit.
By adopting the technical scheme, the AC sampling circuit obtains an alternating current sinusoidal signal (a half-wave signal of 50 Hz) through the diode D1 after voltage division is carried out on the AC sampling circuit in series through the resistor R2 and the resistor R3.
Further, the photoelectric isolation circuit comprises a photoelectric coupler U1, a pin 1 of the photoelectric coupler U1 is connected with a diode D1, a pin 2 of the photoelectric coupler U1 is connected with a zero line N of commercial power, and a pin 3 of the photoelectric coupler U1 is connected with a grounding end.
By adopting the technical scheme, the alternating current sinusoidal signal is converted into the level signal through the photoelectric isolation circuit.
Furthermore, a pin 4 of the photocoupler U1 is connected with the resistor R1 and the control circuit, and the other end of the resistor R1 is connected with the DC step-down voltage stabilizing circuit.
By adopting the technical scheme, the resistor R1 is a pull-up resistor output by the electric coupler U1, and when a light emitting diode in the electric coupler U1 is in a cut-off state, a high level is output; when the light emitting diode inside the electric coupler U1 is in a conducting state, outputting low level; and the reliable detection of the switching level by the control circuit is facilitated.
Furthermore, the output end of the DC voltage reduction and stabilization circuit is connected with a capacitor C2, and the other end of the capacitor C2 is grounded.
By adopting the technical scheme, the capacitor C2 can maintain the set working time of the control circuit after power failure.
Further, the control circuit is an MCU or a wireless SOC, and the present embodiment is preferably a wireless SOC, and the wireless SOC is a bluetooth chip.
Further, the output voltage of the DC voltage reduction and stabilization circuit is 3.3V.
Further, the implementation method of the intelligent lamp switch detection circuit provided by the invention comprises the following steps:
the AC sampling circuit is connected with a mains supply, and is connected with the photoelectric isolation circuit after acquiring the alternating current sinusoidal signal after voltage reduction;
converting the level signal into a level signal through a photoelectric isolation circuit and then connecting the level signal with a level detection IO port of a control circuit;
thirdly, the output end of the DC voltage reduction and stabilization circuit is connected with a capacitor C1, so that the intelligent lamp can still work after being powered off;
fourthly, detecting the power-on and power-off time through pulse width detection of the control circuit, storing the response mark in an internal Flash and accumulating the response mark;
and fifthly, executing a corresponding working mode after the time sequences of power-on and power-off are accumulated to a preset value.
In the embodiment, a control circuit level pulse width detection IO is set to be edge triggered, when an input level is changed, a timer in the control circuit starts timing, when a lamp is in a power-on state, the control circuit acquires a 50Hz pulse width signal, and the power-on time of the intelligent lamp is acquired by counting the pulse width signal; when the lamp is in power-off state, the AC sampling circuit outputs a low-level signal, the photoelectric isolation circuit keeps a high-level output state, the control circuit judges that the intelligent lamp is in the power-off state, and the power-off mark is stored in an internal Flash; after detecting that the intelligent lamp is powered off, the control circuit is set to be in a low power consumption mode; the photoelectric isolation circuit isolates the circuit of the commercial power from the weak current circuit, and the reliability of the circuit is further ensured.
In the embodiment, the wireless SOC adopts a Shanghai Tailing micro TLSR8250 Bluetooth chip as a core and is formed by matching peripheral circuits such as a crystal oscillator, a reset circuit, a radio frequency low-pass circuit, a power supply filter and the like; the AC/DC power supply circuit is a rectifying and filtering circuit consisting of an MB10F rectifying bridge and an electrolytic capacitor and converts an AC power supply into a DC power supply; the DC voltage reduction and stabilization circuit adopts a DC voltage reduction circuit with BP6519 of a crystal rich source as a core and converts a high-voltage direct-current power supply into a low-voltage power supply for supplying power to a control power supply; the DC/DC dimming circuit is a BP5778 linear dimming circuit of a crystal bright source, brightness control of two LED light sources is realized, and the DC voltage reduction and voltage stabilization circuit, the DC/DC dimming circuit and the AC/DC power supply circuit are all known conventional circuits; a photoelectric coupler U1 of the photoelectric isolation circuit adopts PC817 produced by Orlon electronics; diode D1 is a common 4007 rectifier tube; the capacitor C1 is an electrolytic capacitor of 22uF, and the low-power-consumption mode can work normally for more than 10 seconds after the wireless SOC is powered off.
In this embodiment, after the intelligent lamp is powered on, the wireless SOC enters a pulse width detection mode through initialization, when the detected signal output by the optoelectronic isolation circuit is a level pulse signal of 50Hz continuously, the wireless SOC determines that the intelligent lamp is powered on, simultaneously starts to record the detected pulse number and converts the pulse number into power-on time, when the detected time is equal to a set threshold, records that the secondary power-on time mark is stored in Flash inside the wireless SOC, when the detected signal output by the optoelectronic isolation circuit is high continuously, the intelligent lamp is powered off, the wireless SOC is controlled to enter a low power consumption mode, the electric quantity stored in the capacitor C2 is ensured to maintain the wireless SOC to work for a longer time, and simultaneously the wireless SOC records the high level time, when the detected high level time is equal to the set threshold, the power-off time mark is stored in Flash of the wireless SOC, and the wireless SOC records effective power-on and power-off mark bits, and executing the intelligent lamp to enter a reset or segmented dimming control mode, and executing the switch action which is completed or does not meet the time sequence requirement, clearing the recorded power-on and power-off zone bits, and waiting for the next round of switch detection.
According to the method, through actual measurement, the on-off time detection of the intelligent lamp within 50ms-20s can be detected by a pulse width detection mode and a method for enabling the wireless SOC to enter low power consumption during power failure, and the detection accuracy rate is more than 99%. The detection accuracy and range are larger than those of a method only recording power-on time, and the cost and dependence on wireless SOC resources are superior to those of an AD sampling method.
In conclusion, the intelligent lamp pulse width detection circuit detects the pulse width signal of the mains supply, and the switch detection of the intelligent lamp is not influenced by the discharge time of the driving power supply in the intelligent lamp; the intelligent lamp on-off detection precision is higher, and the millisecond-level lamp on-off detection is realized; compared with an ADC (analog to digital converter) switch detection method, the method has the advantages of lower cost and less occupied resources for a control system.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides an intelligence lamp switch detection circuitry which characterized in that: the LED light source comprises an AC/DC power supply circuit and an AC sampling circuit, wherein the input ends of the AC/DC power supply circuit and the AC sampling circuit are both connected with a mains supply, the output end of the AC/DC power supply circuit is respectively connected with a DC voltage reduction and stabilization circuit and the input end of a DC/DC dimming circuit, the output end of the AC sampling circuit is connected with the input end of a photoelectric isolation circuit, the photoelectric isolation circuit and the DC voltage reduction and stabilization circuit are both connected with a control circuit, and the output end of the DC/DC dimming circuit is connected with the input end of an LED light source.
2. The intelligent lamp switch detection circuit of claim 1, wherein: the AC sampling circuit comprises a resistor R2, a resistor R3 and a diode D1, wherein one end of the resistor R2 is connected with a live wire L of a mains supply, the other end of the resistor R2 is connected with a resistor R3, the other end of the resistor R3 is connected with a diode D1, and the other end of the diode D1 is connected with a photoelectric isolation circuit.
3. The intelligent lamp switch detection circuit of claim 2, wherein: the photoelectric isolation circuit comprises a photoelectric coupler U1, wherein a pin 1 of the photoelectric coupler U1 is connected with a diode D1, a pin 2 of the photoelectric coupler U1 is connected with a zero line N of commercial power, and a pin 3 of the photoelectric coupler U1 is connected with a grounding end.
4. The intelligent lamp switch detection circuit of claim 3, wherein: the 4 feet of the photoelectric coupler U1 are connected with the resistor R1 and the control circuit, and the other end of the resistor R1 is connected with the DC voltage reduction and stabilization circuit.
5. The intelligent lamp switch detection circuit of claim 1, wherein: the output end of the DC voltage reduction and stabilization circuit is connected with a capacitor C2, and the other end of the capacitor C2 is grounded.
6. The intelligent lamp switch detection circuit of claim 1, wherein: the control circuit is an MCU or a wireless SOC.
7. The intelligent lamp switch detection circuit of claim 1, wherein: the output voltage of the DC voltage reduction and stabilization circuit is 3.3V.
8. The intelligent lamp switch detection circuit of claim 6, wherein: the wireless SOC is a Bluetooth chip.
9. The method for implementing the intelligent lamp switch detection circuit according to any one of claims 1 to 8, comprising the following steps:
the AC sampling circuit is connected with a mains supply, and is connected with the photoelectric isolation circuit after acquiring the alternating current sinusoidal signal after voltage reduction;
converting the level signal into a level signal through a photoelectric isolation circuit and then connecting the level signal with a level detection IO port of a control circuit;
thirdly, the output end of the DC voltage reduction and stabilization circuit is connected with a capacitor C1, so that the intelligent lamp can still work after being powered off;
fourthly, detecting the power-on and power-off time through pulse width detection of the control circuit, storing the response mark in an internal Flash and accumulating the response mark;
and fifthly, executing a corresponding working mode after the time sequences of power-on and power-off are accumulated to a preset value.
10. The implementation method of the intelligent lamp switch detection circuit according to claim 9, wherein: the AC sampling circuit includes a resistor R2, the device comprises a resistor R3 and a diode D1, wherein one end of a resistor R2 is connected with a live wire L of a mains supply, the other end of the resistor R2 is connected with a resistor R3, the other end of the resistor R3 is connected with a diode D1, the other end of the diode D1 is connected with a photoelectric isolation circuit, the photoelectric isolation circuit comprises a photoelectric coupler U1, a pin 1 of the photoelectric coupler U1 is connected with the diode D1, a pin 2 of the photoelectric coupler U1 is connected with a zero line N of the mains supply, a pin 3 of the photoelectric coupler U1 is connected with a ground terminal, a pin 4 of the photoelectric coupler U1 is connected with the resistor R1 and a control circuit, the other end of the resistor R1 is connected with a DC voltage reduction and voltage regulation circuit, an output end of the DC voltage reduction and voltage regulation circuit is connected with a capacitor C2, the other end of the capacitor C2 is grounded, the control circuit is an MCU or a wireless SOC, an.
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| CN202010708766.0A CN111707865A (en) | 2020-07-22 | 2020-07-22 | Intelligent lamp switch detection circuit and implementation method thereof |
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| CN202010708766.0A CN111707865A (en) | 2020-07-22 | 2020-07-22 | Intelligent lamp switch detection circuit and implementation method thereof |
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2020
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