CN114143943A - Lamp control circuit - Google Patents
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- CN114143943A CN114143943A CN202111458850.2A CN202111458850A CN114143943A CN 114143943 A CN114143943 A CN 114143943A CN 202111458850 A CN202111458850 A CN 202111458850A CN 114143943 A CN114143943 A CN 114143943A
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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
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/105—Controlling the light source in response to determined parameters
- H05B47/115—Controlling the light source in response to determined parameters by determining the presence or movement of objects or living beings
- H05B47/13—Controlling the light source in response to determined parameters by determining the presence or movement of objects or living beings by using passive infrared detectors
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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
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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
- H05B45/37—Converter circuits
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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
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/105—Controlling the light source in response to determined parameters
- H05B47/115—Controlling the light source in response to determined parameters by determining the presence or movement of objects or living beings
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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
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/16—Controlling the light source by timing means
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- 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
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses a lamp control circuit. The lamp control circuit comprises a microwave module, an infrared detection unit, a first signal conditioning circuit, a second signal conditioning circuit, a main control circuit, a lamp driving circuit and an LED. The first signal conditioning circuit processes signals output by the infrared detection unit and outputs first detection signals to the main control circuit, the second signal conditioning circuit conditions signals output by the microwave module and outputs second detection signals to the main control circuit, and the main control circuit outputs control signals to the lamp driving circuit according to the first detection signals and the second detection signals so as to drive the LED to emit light. The invention provides a lamp control circuit which can realize automatic lamp turning-off of a trench lamp in a railway trench, prolong the service life of the trench lamp and save a large amount of electric energy.
Description
Technical Field
The embodiment of the invention relates to an integrated circuit technology, in particular to a lamp control circuit.
Background
When a railway is overhauled, a train is driven to a trench with the depth of 500 meters and the length of 1.5 meters, after the train is stopped stably, an overhaul worker goes into the trench and heads up to inspect wheels and a bogie of a carriage of the train, and because no light or insufficient light exists in the trench, the railway overhauling operation in the trench needs trench lamps for lighting support, one set of trench lamps are generally arranged every 2 meters in the trench, and 250 sets of trench lamps are needed for one trench with the length of 500 meters.
When the overhaul is finished and the overhaul personnel leave the trench, the overhauled train of carriages can be pulled by the locomotive to drive away from the trench, and after the locomotive leaves, the trench lamp is still on, so that huge waste of electric energy is caused.
Disclosure of Invention
The invention provides a lamp control circuit, which is used for automatically turning off a lamp in a railway trench, prolonging the service life of the lamp and saving a large amount of electric energy.
The lamp control circuit comprises a microwave module, an infrared detection unit, a first signal conditioning circuit, a second signal conditioning circuit, a main control circuit, a lamp driving circuit and an LED;
the output end of the infrared detection unit is connected with the input end of the first signal conditioning circuit, and the output end of the first signal conditioning circuit is connected with the first input end of the main control circuit; the output end of the microwave module is connected with the input end of a second signal conditioning circuit, the output end of the second signal conditioning circuit is connected with the second input end of the main control circuit, the output end of the main control circuit is connected with the input end of the lamp driving circuit, and the output end of the lamp driving circuit is connected with the LED; the first signal conditioning circuit is used for processing the signals output by the infrared detection unit and then outputting first detection signals to the main control circuit, the second signal conditioning circuit is used for conditioning the signals output by the microwave module and then outputting second detection signals to the main control circuit, and the main control circuit is used for outputting control signals to the lamp driving circuit according to the first detection signals and the second detection signals so as to drive the LED to emit light.
Optionally, the infrared detection unit is configured to output a first detection signal as a first signal when detecting that the living body approaches the first signal conditioning circuit; when the microwave module detects that the living body moves, a second detection signal output by the second signal conditioning circuit is a second signal; the main control circuit is used for controlling the LED to emit light when the first detection signal is a first signal and the second detection signal is a second signal, and controlling the LED to be turned off when the first detection signal is a non-first signal after detection after the LED is controlled to emit light for a preset time in a delayed mode.
Optionally, the infrared detection unit includes an infrared probe, a first resistor, a second resistor, a first capacitor, a second capacitor, and a third capacitor;
the first end of the first resistor is connected with a first voltage input end of the infrared probe, the second end of the first resistor is connected with a first power supply end through a second resistor, the first end of the first capacitor is connected with the first end of the first resistor, the second end of the first capacitor is connected with a second power supply end, the first end of the second capacitor is connected with the second end of the first capacitor, the second end of the second capacitor is connected with the second end of the first resistor, and the third capacitor is connected with the second capacitor in parallel; and a second voltage input end of the infrared probe is connected with a second power supply end, and an output end of the infrared probe is used as an output end of the infrared detection unit.
Optionally, the first signal conditioning circuit includes a filtering unit, a first amplifying unit, and a second amplifying unit;
the input end of the filtering unit is used as the input end of the first signal conditioning circuit, the output end of the filtering power supply is connected with the input end of the first amplifying unit, the output end of the first amplifying unit is connected with the input end of the second amplifying unit, and the output end of the second amplifying unit is used as the output end of the first signal conditioning circuit.
Optionally, the filtering unit includes a third resistor, a fourth capacitor, a fifth capacitor, and a sixth capacitor;
the first end of the fourth capacitor is connected with the input end of the filtering unit, the second end of the fourth capacitor is connected with the second power supply end, and the third resistor and the fifth capacitor are connected with the fourth capacitor in parallel;
the first end of the sixth capacitor is connected with the output end of the filtering unit, the second end of the sixth capacitor is connected with the second power supply end, and the fourth resistor is connected between the first end of the fourth capacitor and the first end of the sixth capacitor.
Optionally, the first amplifying unit includes a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, a fifth resistor, a sixth resistor, and a first operational amplifier;
the positive input end of the first operational amplifier is connected with the input end of the first amplifying unit, the seventh capacitor is connected between the positive input end and the reverse input end of the first operational amplifier, and the eighth capacitor is connected between the reverse input end and the second power supply end of the first operational amplifier;
the first end of the ninth capacitor is connected with the second power supply end, the second end of the ninth capacitor is connected with the reverse input end of the first operational amplifier through a fifth resistor, the sixth resistor is connected between the reverse input end and the output end of the first operational amplifier, and the tenth capacitor is connected with the sixth resistor in parallel.
Optionally, an eleventh capacitor, a pull-up resistor, and a pull-down resistor are further connected between the output terminal of the first amplifying unit and the input terminal of the second amplifying unit;
the second amplification unit includes: a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a fifteenth capacitor, a seventh resistor, an eighth resistor, a ninth resistor and a second operational amplifier;
the positive input end of the second operational amplifier is connected with the input end of the second amplifying unit, the twelfth capacitor is connected between the positive input end and the reverse input end of the second operational amplifier, and the thirteenth capacitor is connected between the reverse input end and the second power supply end of the second operational amplifier;
the first end of the fourteenth capacitor is connected with the second power supply end, the second end of the fourteenth capacitor is connected with the inverting input end of the second operational amplifier through the seventh resistor, the eighth resistor is connected between the inverting input end and the output end of the second operational amplifier, the fifteenth capacitor is connected with the eighth resistor in parallel, and the ninth resistor is connected between the output end of the second operational amplifier and the output end of the second amplifying unit.
Optionally, the microwave module is connected to the input terminal of the second signal conditioning circuit through a third signal conditioning circuit,
the third signal conditioning circuit comprises a sixteenth capacitor, a seventeenth capacitor, a tenth resistor and an eleventh resistor;
a first voltage input end and a second voltage input end of the microwave module are respectively connected with a first power supply end and a second power supply end, a signal output end of the microwave module is connected with a first end of a tenth resistor, and a second end of the tenth resistor is connected with an input end of a second signal processing unit through a sixteenth capacitor;
a first end of the seventeenth capacitor is connected to the second power supply end, a second end of the seventeenth capacitor is connected to a second end of the tenth resistor, a first end of the eleventh resistor is connected to a second end of the tenth resistor, and a second end of the eleventh resistor is connected to the first power supply end.
Optionally, the second signal conditioning circuit comprises:
an eighteenth capacitor, a nineteenth capacitor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a third operational amplifier and a fourth operational amplifier;
the reverse input end of the third operational amplifier is connected with the input end of the second signal conditioning circuit, and the positive input end of the third operational amplifier is connected with the positive input end of the fourth operational amplifier; the eighteenth capacitor is connected between the inverting input end and the output end of the third operational amplifier; the twelfth resistor is connected with the eighteenth capacitor in parallel; the first end of the nineteenth capacitor is connected with the output end of the third operational amplifier, the second end of the nineteenth capacitor is connected with the inverting input end of the fourth operational amplifier through the thirteenth resistor, the fourteenth resistor is connected between the inverting input end and the output end of the fourth operational amplifier, the first end of the fifteenth resistor is connected with the output end of the fourth operational amplifier, and the second end of the fifteenth resistor is connected with the output end of the second signal conditioning circuit.
Optionally, the main control circuit is further connected with a control key; the lamp driving circuit comprises a buck converter, a diode, a sixteenth resistor and an inductor, wherein a power supply end of the buck converter is connected with a first power supply end, an output end of the buck converter is connected with one end of the LED through the inductor, the diode is connected between the output end of the buck converter and the first power supply end, and the sixteenth resistor is connected between the other end of the LED and the first power supply end.
The invention provides a lamp control circuit, which can realize automatic lamp turning-off of lamps in a railway trench after an operator leaves the trench by combining an infrared detection unit, a microwave module and other circuits, can prolong the service life of the lamps and can save a large amount of electric energy.
Drawings
Fig. 1 is a block diagram of a lamp control circuit according to a first embodiment of the present invention;
fig. 2 is a lamp control circuit according to a second embodiment of the present invention;
fig. 3 is another lamp control circuit according to a second embodiment of the present invention;
fig. 4 is a further lamp control circuit according to the second embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a block diagram of a lamp control circuit according to a first embodiment of the present invention, which is applicable to control of a lamp in a railway trench, and referring to fig. 1, the lamp control circuit includes a microwave module 10, an infrared detection unit 20, a first signal conditioning circuit 30, a second signal conditioning circuit 40, a main control circuit 50, a lamp driving circuit 60, and an LED;
the output end of the infrared detection unit 20 is connected with the input end of the first signal conditioning circuit 30, and the output end of the first signal conditioning circuit 30 is connected with the first input end of the main control circuit 50; the output end of the microwave module 10 is connected with the input end of the second signal conditioning circuit 40, the output end of the second signal conditioning circuit 40 is connected with the second input end of the main control circuit 50, the output end of the main control circuit 50 is connected with the input end of the lamp driving circuit 60, and the output end of the lamp driving circuit 60 is connected with the LED; the first signal conditioning circuit 30 is configured to process a signal output by the infrared detection unit 20 and output a first detection signal PIR to the main control circuit 50, the second signal conditioning circuit 40 is configured to condition a signal output by the microwave module 10 and output a second detection signal WM to the main control circuit 50, and the main control circuit 50 is configured to output a control signal to the lamp driving circuit 60 according to the first detection signal PIR and the second detection signal WM to drive the LED to emit light.
Specifically, the infrared detection unit 20 can detect a living body within a certain distance, for example, when a person works, the infrared detection unit 20 can detect infrared light emitted by the person, the infrared detection unit 20 converts the infrared light into an electrical signal, the electrical signal output by the infrared detection unit 20 is transmitted to the first signal conditioning circuit 30, the first signal conditioning circuit 30 outputs a first detection signal PIR to the main control circuit 50 after processing, that is, the signal is processed into a signal suitable for the main control circuit 50, and the main control circuit 50 controls the LED through the lamp driving circuit 60 according to the first detection signal PIR. The microwave module 10 can detect the movement of a living body, for example, when a person works, the microwave module 10 can detect the movement of the person, the microwave module 10 converts a microwave signal of the movement of the person into an electrical signal, the electrical signal output by the microwave module 10 is transmitted to the second signal conditioning circuit 40, the second signal conditioning circuit 40 outputs a second detection signal WM to the main control circuit 50 after processing, that is, the signal is processed into a signal suitable for the main control circuit 50, and the main control circuit 50 controls the LED through the lamp driving circuit 60 according to the second detection signal WM.
The embodiment of the invention provides a lamp control circuit, wherein an infrared detection unit can detect that an operator is in a trench, a microwave module can detect that the operator moves in the trench, electric signals output by the infrared detection unit and the microwave module are transmitted to a main control circuit, and the main control circuit outputs a control signal to a lamp driving circuit according to a first detection signal and a second detection signal so as to drive an LED to emit light. When the operator leaves, the main control circuit continues to detect the electric signals output by the infrared detection unit and the microwave module after the LED is controlled to emit light in a delayed mode for a preset time, and when the first detection signal is not the first signal after detection, the LED is controlled to be turned off. Therefore, by combining the infrared detection unit with circuits such as the microwave module and the like, the automatic turning-off of the lamp in the railway trench can be realized after the operator leaves the trench, the service life of the lamp can be prolonged, and a large amount of electric energy can be saved.
Example two
Fig. 2 is a lamp control circuit according to a second embodiment of the present invention. Fig. 3 is another lamp control circuit according to a second embodiment of the present invention. Fig. 4 is a further lamp control circuit according to the second embodiment of the present invention. On the basis of the above embodiment, with reference to fig. 2, fig. 3 and fig. 4, the infrared detection unit 20 is configured to detect that the first detection signal PIR output by the first signal conditioning circuit 30 is the first signal when the approaching of the living body is detected; when the microwave module 10 detects that the living body moves, a second detection signal WM output by the second signal conditioning circuit 40 is a second signal; the main control circuit 50 is configured to control the LED to emit light when the first detection signal PIR is a first signal and the second detection signal WM is a second signal, and control the LED to turn off when the detected first detection signal PIR is a non-first signal after the LED is controlled to emit light for a preset time in a delayed manner.
Specifically, the infrared detection unit 20 may select a pyroelectric detector, which converts the radiant heat energy of the infrared ray into electric energy to output an electric signal to represent the intensity of the infrared ray. When the infrared detection unit cannot detect the human body, no signal is output or a zero-voltage signal is output; when the infrared detection unit 20 detects an infrared light emitted by a person, the infrared detection unit 20 outputs a first signal through the first signal conditioning circuit 30, the first signal may be a non-zero voltage, and the first signal conditioning circuit 30 outputs the first signal to the main control circuit 50.
The microwave module 10 may select a radar sensor, which is an electronic device that detects a target using electromagnetic waves, and irradiates the target by emitting electromagnetic waves and receives an echo of the target, thereby obtaining information such as a distance, a distance change rate, an azimuth, and an angle from the target to an electromagnetic wave emitting point. The microwave module 10 does not output a signal or output a zero voltage signal when not detecting the movement of the living body; when the microwave module 10 detects the movement of the living body, the microwave module 10 outputs a second signal through the second signal conditioning circuit 40, the second signal may be a non-zero voltage signal, and the second signal conditioning circuit 40 outputs the second signal to the main control circuit 50. When the first detection signal PIR is the first signal and the second detection signal WM is the second signal, the main control circuit 50 indicates that the activity of the person is detected, and the main control circuit outputs a control signal to the lamp driving circuit according to the first detection signal and the second detection signal, so that the LED can be controlled to emit light, and the preset light emitting time is set. And detecting and updating the first signal and the second signal after the preset light-emitting time is over, wherein the main control circuit 50 indicates that no personnel activity is detected and the operator leaves when the first detection signal PIR is the first signal and the second detection signal WM is the non-second signal, and controls the LED to be turned off, so that the automatic light turning-off of the lamp in the railway trench can be realized after the operator leaves the trench.
With continued reference to fig. 2, optionally, the infrared detection unit 20 includes an infrared probe IR, a first resistor R1, a second resistor R2, a first capacitor C1, a second capacitor C2, and a third capacitor C3;
a first end of a first resistor R1 is connected with a first voltage input end of the infrared probe IR, a second end of a first resistor R1 is connected with a first power supply end VCC through a second resistor R2, a first end of a first capacitor C1 is connected with a first end of a first resistor R1, a second end of a first capacitor C1 is connected with a second power supply end VSS, a first end of a second capacitor C2 is connected with a second end of a first capacitor C1, a second end of the second capacitor C2 is connected with a second end of a first resistor R1, and a third capacitor C3 is connected with a second capacitor C2 in parallel; a second voltage input terminal of the infrared probe IR is connected to the second power source terminal VSS, and an output terminal of the infrared probe IR serves as an output terminal of the infrared detection unit 20.
Specifically, the infrared probe IR may be a passive infrared probe IR, the passive infrared probe IR passively receives infrared rays emitted from a living body when operating, the passive infrared probe IR operates by detecting infrared rays emitted from a human body, the infrared probe IR collects external infrared radiation and collects the external infrared radiation to an infrared sensing source, the infrared sensing source generally employs a pyroelectric element, and the infrared probe IR releases charges when receiving changes in infrared radiation temperature, so that an output end of the infrared probe IR outputs a high-level signal.
Optionally, the first signal conditioning circuit 30 includes a filtering unit 310, a first amplifying unit 320, and a second amplifying unit 330;
the input end of the filtering unit 310 is used as the input end of the first signal conditioning circuit 30, the output end of the filtering power supply is connected with the input end of the first amplifying unit 320, the output end of the first amplifying unit 320 is connected with the input end of the second amplifying unit 330, and the output end of the second amplifying unit 330 is used as the output end of the first signal conditioning circuit 30.
Specifically, the filtering unit 310 may be a filter, or may be a filtering circuit composed of a capacitor and a resistor. The filtering unit 310 can effectively filter the output dc component of the output terminal of the infrared probe IR, reduce the dc component in the pulsating ac voltage as much as possible, and retain the ac component thereof, so that the ripple factor of the output voltage is reduced, and the waveform becomes smoother, thereby avoiding the interference of smaller life bodies to the circuit.
Optionally, the filtering unit 310 includes a third resistor R3, a fourth resistor R4, a fourth capacitor C4, a fifth capacitor C5, and a sixth capacitor C6;
a first end of the fourth capacitor C4 is connected to the input end of the filter unit 310, a second end of the fourth capacitor C4 is connected to the second power source terminal VSS, and the third resistor R3 and the fifth capacitor C5 are both connected in parallel with the fourth capacitor C4; a first terminal of the sixth capacitor C6 is connected to the output terminal of the filter unit 310, a second terminal of the sixth capacitor C6 is connected to the second power source terminal VSS, and the fourth resistor R4 is connected between the first terminal of the fourth capacitor C4 and the first terminal of the sixth capacitor C6.
Specifically, the infrared detection unit 20 outputs a high-level signal with a dc component, and the fourth capacitor C4, the fifth capacitor C5, and the sixth capacitor C6 filter the high-level signal to reduce the ripple.
Optionally, the first amplifying unit 320 includes a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, a fifth resistor R5, a sixth resistor R6, and a first operational amplifier OA 1;
a forward input terminal of the first operational amplifier OA1 is connected to the input terminal of the first amplifying unit 320, a seventh capacitor C7 is connected between the forward input terminal and the inverting input terminal of the first operational amplifier OA1, and an eighth capacitor C8 is connected between the inverting input terminal of the first operational amplifier OA1 and the second power supply terminal VSS;
a first terminal of a ninth capacitor C9 is connected to the second power source terminal VSS, a second terminal of the ninth capacitor C9 is connected to the inverting input terminal of the first operational amplifier OA1 through a fifth resistor R5, a sixth resistor R6 is connected between the inverting input terminal and the output terminal of the first operational amplifier OA1, and a tenth capacitor C10 is connected in parallel to the sixth resistor R6.
Specifically, the first amplification unit 320 may amplify the voltage signal at the output terminal of the filtering unit 310. Illustratively, the first operational amplifier OA1 may select a non-inverting amplifier. The voltage signal at the output terminal of the filtering unit 310 is amplified by the first amplifying unit 320 and output to the second amplifying unit 330.
Optionally, an eleventh capacitor C11, a pull-up resistor, and a pull-down resistor are further connected between the output terminal of the first amplifying unit 320 and the input terminal of the second amplifying unit 330;
optionally, the second amplifying unit 330 includes: a twelfth capacitor C12, a thirteenth capacitor C13, a fourteenth capacitor C14, a fifteenth capacitor C15, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, and a second operational amplifier OA 2;
a forward input terminal of the second operational amplifier OA2 is connected to the input terminal of the second amplifying unit 330, a twelfth capacitor C12 is connected between the forward input terminal and the inverting input terminal of the second operational amplifier OA2, and a thirteenth capacitor C13 is connected between the inverting input terminal of the second operational amplifier OA2 and the second power source terminal VSS;
a first terminal of a fourteenth capacitor C14 is connected to the second power source terminal VSS, a second terminal of the fourteenth capacitor C14 is connected to the inverting input terminal of the second operational amplifier OA2 through a seventh resistor R7, an eighth resistor R8 is connected between the inverting input terminal and the output terminal of the second operational amplifier OA2, a fifteenth capacitor C15 is connected in parallel to the eighth resistor R8, and a ninth resistor R9 is connected between the output terminal of the second operational amplifier OA2 and the output terminal of the second amplifying unit 330.
Specifically, the second amplification unit 330 may amplify the voltage signal at the output terminal of the first amplification unit 320. Illustratively, the second operational amplifier OA2 may select a non-inverting amplifier. The voltage signal at the output terminal of the first amplifying unit 320 is amplified by the second amplifying unit 330 to output a first signal to the main control circuit 50, and the output terminal of the second amplifying unit 330 is used as the output terminal of the first signal conditioning circuit 30 to output a first detection signal PIR to the main control circuit 50.
With continued reference to fig. 3, optionally, microwave module 10 is coupled to an input of second signal conditioning circuit 40 via a third signal conditioning circuit 70,
the third signal conditioning circuit 70 includes a sixteenth capacitor C16, a seventeenth capacitor C17, a tenth resistor R10, and an eleventh resistor R11;
a first voltage input end and a second voltage input end of the microwave module 10 are respectively connected with a first power supply terminal VCC and a second power supply terminal VSS, a signal output end of the microwave module 10 is connected with a first end of a tenth resistor R10, and a second end of the tenth resistor R10 is connected with an input end of a second signal processing unit through a sixteenth capacitor C16;
a first terminal of the seventeenth capacitor C17 is connected to the second power source terminal VSS, a second terminal of the seventeenth capacitor C17 is connected to the second terminal of the tenth resistor R10, a first terminal of the eleventh resistor R11 is connected to the second terminal of the tenth resistor R10, and a second terminal of the eleventh resistor R11 is connected to the first power source terminal VCC.
Specifically, the third signal conditioning circuit 70 mainly filters the dc component in the microwave module 10, so as to reduce the fluctuation, reduce the ripple coefficient of the output voltage, and smooth the waveform, so as to avoid the interference of fine movement caused by external reasons to the circuit.
The microwave module 10 can select the motion detector MDU2000, the pin 1 of the motion detector MDU2000 is connected to the first power terminal VCC, the pin 3 of the motion detector MDU2000 is connected to the second power terminal VSS, when the motion detector MDU2000 detects the movement of the living body, the motion detector MDU2000 converts the signal of the movement of the living body into an electrical signal, the electrical signal is output to the third signal conditioning circuit 70 through the pin 2 of the motion detector MDU2000, the conditioned electrical signal is input to the second signal conditioning circuit 40 by the third signal conditioning circuit 70, and the second signal conditioning circuit 40 outputs the second signal, thereby controlling the light emission or the light extinction of the LED.
Optionally, the second signal conditioning circuit 40 comprises: an eighteenth capacitor C18, a nineteenth capacitor C19, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a third operational amplifier OA3 and a fourth operational amplifier OA 4;
the inverting input of the third operational amplifier OA3 is connected to the input of the second signal conditioning circuit 40, and the forward input of the third operational amplifier OA3 is connected to the forward input of the fourth operational amplifier OA 4; the eighteenth capacitor C18 is connected between the inverting input and the output of the third operational amplifier OA 3; the twelfth resistor R12 is connected in parallel with the eighteenth capacitor C18; a first terminal of a nineteenth capacitor C19 is connected to the output terminal of the third operational amplifier OA3, a second terminal of the nineteenth capacitor C19 is connected to the inverting input terminal of the fourth operational amplifier OA4 through a thirteenth resistor R13, a fourteenth resistor R14 is connected between the inverting input terminal and the output terminal of the fourth operational amplifier OA4, a first terminal of a fifteenth resistor R15 is connected to the output terminal of the fourth operational amplifier OA4, the second detection signal WM is output to the main control circuit 50, and a second terminal of a fifteenth resistor R15 is connected to the output terminal of the second signal conditioning circuit 40.
Specifically, the third operational amplifier OA3, the twelfth resistor R12 and the eighteenth capacitor C18 amplify the electrical signal in the third signal conditioning circuit 70 for the first time, the fourth operational amplifier OA4 and the fourteenth resistor R14 amplify the electrical signal in the third signal conditioning circuit 70 for the second time, and the second signal conditioning circuit 40 outputs the second signal to the main control circuit 50, so as to control the LED to emit light or extinguish.
Illustratively, when the output end of the infrared probe IR outputs a high level signal, and the output end of the microwave module 10 outputs the high level signal, the first signal conditioning circuit 30 processes the first signal and outputs the processed signal to the main control circuit 50, the second signal conditioning circuit 40 processes the second signal and outputs the processed signal to the main control circuit 50, and when the first detection signal PIR is the first signal and the second detection signal WM is the second signal, the main control circuit 50 further controls the LED to emit light according to the circuit conditions. After the LED is controlled to emit light in a delayed mode for a preset time, when a first detection signal PIR is a non-first signal after detection, the LED is controlled to be turned off.
With continued reference to fig. 4, optionally, the main control circuit 50 is further connected to a control key S1; the lamp driving circuit 60 includes a buck converter SW, a diode, a sixteenth resistor R16 and an inductor, the power supply terminal of the buck converter SW is connected to the first power supply terminal VCC, the output terminal of the buck converter SW is connected to one end of the LED through the inductor, the diode is connected between the output terminal of the buck converter SW and the first power supply terminal VCC, and the sixteenth resistor R16 is connected between the other end of the LED and the first power supply terminal VCC.
Specifically, the main control circuit 50 may be some peripheral circuits of the chip SN2711 and the chip working normally, the pin 1 of the chip SN2711 is connected to the first power end VCC, the first power end VCC supplies power, when the power is turned on, the pin 2 of the chip SN2711 inputs the first signal, the pin 3 of the chip SN2711 inputs the second signal, the pin 4 and the pin 7 of the chip SN2711 are suspended, and the pin 5 of the chip SN2711 is connected to the control key S1 to control the on/off of the main control circuit 50. Pin 8 of the chip SN2711 is grounded, and pin 6 of the chip SN2711 outputs a control signal.
The embodiment of the invention provides a lamp control circuit which directly controls an LED to emit light or extinguish through a main control circuit and a control key. The circuit provides a first signal and a second signal for the main control circuit through the infrared detection unit and the microwave module, when the activity of people is detected, the main control circuit outputs a control signal to the lamp driving circuit according to the first signal and the second signal, the LED can be controlled to emit light, and the light emitting preset time is set. The main control circuit detects and updates the first signal and the second signal after the preset light-emitting time is over, when the first detection signal is the first signal and the second detection signal is the non-second signal, the fact that personnel movement is not detected is indicated, an operator leaves the trench, the LED is controlled to automatically extinguish, and automatic light turning-off of the lamp in the railway trench can be achieved after the operator leaves the trench. The phenomenon that the operator forgets to turn off the lamp after leaving the trench is avoided, the automatic turning off of the lamp in the railway trench is realized, the service life of the lamp can be prolonged, and a large amount of electric energy can be saved.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A lamp control circuit is characterized by comprising a microwave module, an infrared detection unit, a first signal conditioning circuit, a second signal conditioning circuit, a main control circuit, a lamp driving circuit and an LED;
the output end of the infrared detection unit is connected with the input end of the first signal conditioning circuit, and the output end of the first signal conditioning circuit is connected with the first input end of the main control circuit; the output end of the microwave module is connected with the input end of the second signal conditioning circuit, the output end of the second signal conditioning circuit is connected with the second input end of the main control circuit, the output end of the main control circuit is connected with the input end of the lamp driving circuit, and the output end of the lamp driving circuit is connected with the LED; the first signal conditioning circuit is used for processing the signal output by the infrared detection unit and then outputting a first detection signal to the main control circuit, the second signal conditioning circuit is used for conditioning the signal output by the microwave module and then outputting a second detection signal to the main control circuit, and the main control circuit is used for outputting a control signal to the lamp driving circuit according to the first detection signal and the second detection signal so as to drive the LED to emit light.
2. The lamp control circuit of claim 1, wherein the infrared detection unit is configured to output a first detection signal as the first signal when detecting that the living body is approaching; when the microwave module detects that the living body moves, a second detection signal output by the second signal conditioning circuit is a second signal; the main control circuit is used for controlling the LED to emit light when the first detection signal is a first signal and the second detection signal is a second signal, and controlling the LED to be turned off when the first detection signal is a non-first signal after detection after the LED is controlled to emit light for a preset time in a delayed mode.
3. The lamp control circuit of claim 1, wherein the infrared detection unit comprises an infrared probe, a first resistor, a second resistor, a first capacitor, a second capacitor, and a third capacitor;
the first end of the first resistor is connected with a first voltage input end of the infrared probe, the second end of the first resistor is connected with a first power supply end through the second resistor, the first end of the first capacitor is connected with the first end of the first resistor, the second end of the first capacitor is connected with a second power supply end, the first end of the second capacitor is connected with the second end of the first capacitor, the second end of the second capacitor is connected with the second end of the first resistor, and the third capacitor is connected with the second capacitor in parallel; and a second voltage input end of the infrared probe is connected with the second power supply end, and an output end of the infrared probe is used as an output end of the infrared detection unit.
4. The lamp control circuit of claim 1, wherein the first signal conditioning circuit comprises a filtering unit, a first amplifying unit, and a second amplifying unit;
the input end of the filtering unit is used as the input end of the first signal conditioning circuit, the output end of the filtering power supply is connected with the input end of the first amplifying unit, the output end of the first amplifying unit is connected with the input end of the second amplifying unit, and the output end of the second amplifying unit is used as the output end of the first signal conditioning circuit.
5. The lamp control circuit of claim 4, wherein the filter unit comprises a third resistor, a fourth capacitor, a fifth capacitor and a sixth capacitor;
a first end of the fourth capacitor is connected with the input end of the filtering unit, a second end of the fourth capacitor is connected with a second power supply end, and the third resistor and the fifth capacitor are both connected with the fourth capacitor in parallel;
the first end of the sixth capacitor is connected to the output end of the filtering unit, the second end of the sixth capacitor is connected to the second power supply end, and the fourth resistor is connected between the first end of the fourth capacitor and the first end of the sixth capacitor.
6. The lamp control circuit of claim 4, wherein the first amplifying unit comprises a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, a fifth resistor, a sixth resistor, and a first operational amplifier;
the positive input end of the first operational amplifier is connected with the input end of the first amplifying unit, the seventh capacitor is connected between the positive input end and the negative input end of the first operational amplifier, and the eighth capacitor is connected between the negative input end and the second power supply end of the first operational amplifier;
a first end of the ninth capacitor is connected to the second power source end, a second end of the ninth capacitor is connected to the inverting input end of the first operational amplifier through the fifth resistor, the sixth resistor is connected between the inverting input end and the output end of the first operational amplifier, and the tenth capacitor is connected in parallel with the sixth resistor.
7. The lamp control circuit according to claim 4, wherein an eleventh capacitor, a pull-up resistor and a pull-down resistor are further connected between the output terminal of the first amplifying unit and the input terminal of the second amplifying unit;
the second amplification unit includes: a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a fifteenth capacitor, a seventh resistor, an eighth resistor, a ninth resistor and a second operational amplifier;
the forward input end of the second operational amplifier is connected with the input end of the second amplifying unit, the twelfth capacitor is connected between the forward input end and the reverse input end of the second operational amplifier, and the thirteenth capacitor is connected between the reverse input end and a second power supply end of the second operational amplifier;
a first end of the fourteenth capacitor is connected to the second power source end, a second end of the fourteenth capacitor is connected to the inverting input end of the second operational amplifier through the seventh resistor, the eighth resistor is connected between the inverting input end and the output end of the second operational amplifier, the fifteenth capacitor is connected in parallel with the eighth resistor, and the ninth resistor is connected between the output end of the second operational amplifier and the output end of the second amplifying unit.
8. The lamp control circuit of claim 1, wherein the microwave module is connected to the input of the second signal conditioning circuit via a third signal conditioning circuit,
the third signal conditioning circuit comprises a sixteenth capacitor, a seventeenth capacitor, a tenth resistor and an eleventh resistor;
a first voltage input end and a second voltage input end of the microwave module are respectively connected with a first power supply end and a second power supply end, a signal output end of the microwave module is connected with a first end of the tenth resistor, and a second end of the tenth resistor is connected with an input end of the second signal processing unit through the sixteenth capacitor;
a first end of the seventeenth capacitor is connected to the second power source end, a second end of the seventeenth capacitor is connected to a second end of the tenth resistor, a first end of the eleventh resistor is connected to a second end of the tenth resistor, and a second end of the eleventh resistor is connected to the first power source end.
9. The lamp control circuit of claim 8, wherein the second signal conditioning circuit comprises:
an eighteenth capacitor, a nineteenth capacitor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a third operational amplifier and a fourth operational amplifier;
the reverse input end of the third operational amplifier is connected with the input end of the second signal conditioning circuit, and the positive input end of the third operational amplifier is connected with the positive input end of the fourth operational amplifier; the eighteenth capacitor is connected between the inverting input end and the output end of the third operational amplifier; the twelfth resistor is connected with the eighteenth capacitor in parallel; a first end of the nineteenth capacitor is connected to the output end of the third operational amplifier, a second end of the nineteenth capacitor is connected to the inverting input end of the fourth operational amplifier through the thirteenth resistor, the fourteenth resistor is connected between the inverting input end and the output end of the fourth operational amplifier, a first end of the fifteenth resistor is connected to the output end of the fourth operational amplifier, and a second end of the fifteenth resistor is connected to the output end of the second signal conditioning circuit.
10. The lamp control circuit of claim 1, wherein the master control circuit is further connected with a control button; the lamp driving circuit comprises a buck converter, a diode, a sixteenth resistor and an inductor, wherein a power supply end of the buck converter is connected with a first power supply end, an output end of the buck converter is connected with one end of the LED through the inductor, the diode is connected between the output end of the buck converter and the first power supply end, and the sixteenth resistor is connected between the other end of the LED and the first power supply end.
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| CN202111458850.2A CN114143943A (en) | 2021-12-02 | 2021-12-02 | Lamp control circuit |
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| CN202111458850.2A CN114143943A (en) | 2021-12-02 | 2021-12-02 | Lamp control circuit |
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| CN210518955U (en) * | 2019-08-16 | 2020-05-12 | 三峡大学 | Automatic dimming control system for lamp |
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