CN105407615A - Flashlight for automatically adjusting brightness with change of irradiation distance - Google Patents
Flashlight for automatically adjusting brightness with change of irradiation distance Download PDFInfo
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- CN105407615A CN105407615A CN201511002490.XA CN201511002490A CN105407615A CN 105407615 A CN105407615 A CN 105407615A CN 201511002490 A CN201511002490 A CN 201511002490A CN 105407615 A CN105407615 A CN 105407615A
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- chip
- port
- button
- electric capacity
- distance detection
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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
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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]
- H05B45/10—Controlling the intensity of the light
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention provides a flashlight for automatically adjusting brightness with the change of an irradiation distance, and discloses a light source for automatically adjusting the brightness with the change of the irradiation distance. The flashlight comprises an ultrasonic distance detection module, a switch, a button, a flashlight body, a snoot, an optical filter, an led lamp, a front fixing ring, a back fixing ring, a circuit board and other parts. The distance detection module can detect the distance between an irradiated object aligned to the light source and the light source in real time and transmit the information to a singlechip through an I/O port, the singlechip receives the signal, outputs PWM waves with different duty ratios, controls a driving module to output different voltages and provides different current for the high-power led lamp through a resistor, in order to adjust the brightness of the light source and automatically adjust the light intensity of the light source with the change of the irradiation distance, so that an illumination effect is guaranteed to be basically unchanged in the case of light source jitter or distance change. The flashlight provided by the invention automatically changes the illumination brightness according to the distance, and meanwhile, the illumination brightness corresponding to the same irradiation distance can also be changed by the button to realize human-friendly adjustment.
Description
Technical field
The present invention relates to a kind of tunable light source, particularly relate to the flashlight changing automatically adjust light strength with irradiation distance.
Background technology
Existing partial illumination device, can change brightness of illumination, adaptating lighting requirement to a certain extent by button or switch artificially.But because light source position changes or shake, irradiation distance will change, and the actual light being irradiated to body will increase or reduce, the requirement of permanent brightness illumination under given conditions cannot be met.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of flashlight changing automatically adjust light strength with irradiation distance.
In order to achieve the above object, the technical solution adopted in the present invention is as follows: a kind of flashlight changing automatically adjust light strength with irradiation distance, comprises ultrasonic distance detection module, switch, button, snoot, cylindrical shell, filter, LED lamp, front retainer plate, rear retainer plate, circuit board, two joints No. 1 battery; Wherein, described ultrasonic distance detection module is fixed on cylindrical shell front portion; Front retainer plate and cylindrical shell front portion are threaded connection, and are embedded with filter in the middle part of front retainer plate; The anterior internal fixtion of cylindrical shell has snoot; LED lamp is fixed bottom snoot; Inner barrel places No. 1 battery of two joint serial connections; Switch and button is embedded with in the middle part of cylindrical shell; Cylindrical shell rear portion and rear retainer plate are by screw thread compact siro spinning technology; Circuit board is embedded between cylindrical shell front portion and snoot; Described two joints No. 1 battery is connected with circuit board by switch; Ultrasonic distance detection module, button are all connected with circuit board with LED lamp.
Further, described circuit board comprises main control module, power module and driver module; Wherein, described power module is all connected with main control module with driver module;
Described main control module comprises single-chip microcomputer U1, reset circuit and crystal oscillating circuit; Wherein, described reset circuit is reset button S2; Reset button S2 one end is connected with the reseting port of single-chip microcomputer, other end ground connection; Described crystal oscillating circuit comprises crystal oscillator XTAL, nonpolar electric capacity C2 and nonpolar electric capacity C3; Be connected with the first external clock input port of single-chip microcomputer after one end of described nonpolar electric capacity C2 is connected with one end of crystal oscillator XTAL, be connected with the second external clock input port of single-chip microcomputer after one end of nonpolar electric capacity C3 is connected with the other end of crystal oscillator XTAL; The other end of nonpolar electric capacity C2 and the equal ground connection of the other end of nonpolar electric capacity C3;
Described power module comprises voltage stabilizing chip U3 and electric capacity C1; Wherein, the input port of described voltage stabilizing chip U3 saves No. 1 battery of connecting through switch and two and is connected; The grounding ports ground connection of voltage stabilizing chip U3; The output port of voltage stabilizing chip U3 is as power port, and it connects the power port of single-chip microcomputer U1 after being connected with one end of electric capacity C1; The other end ground connection of electric capacity C1;
Described driver module comprises driving chip U4 and resistance R1; Wherein, described driving chip U4 Enable Pin with export the output port of termination voltage stabilizing chip U3 of powering; The digital voltage input port of driving chip U4 is connected with the PWM output port of single-chip microcomputer U1; The analog voltage output port of driving chip U4 is connected with one end of resistance R1, and the other end of resistance R1 is connected with the positive pole of LED lamp, the minus earth of LED lamp;
Described ultrasonic distance detection module is ultrasonic distance detection chip U2, and the control end of ultrasonic distance detection chip U2 is all connected with the I/O port of single-chip microcomputer U1 with receiving terminal; The power port of ultrasonic distance detection chip U2 is connected with the output port of voltage stabilizing chip U3; The grounding ports ground connection of ultrasonic distance detection chip U2;
One end of described button and the I/O port of single-chip microcomputer U1, the other end ground connection of button.
Further, the power bracket of described LED lamp is between 1W-3W.
The present invention is compared with background technology, and the beneficial effect had is:
1, can automatically detect irradiating object and light source distance, reduce light-source brightness apart from time near, during distance, increase light-source brightness, under ensureing some particular requirement, the requirement of permanent brightness illumination.
2, while automatically changing brightness of illumination according to distance, also can change brightness of illumination corresponding to same irradiation distance by button, realize hommization and regulate.
Accompanying drawing explanation
Fig. 1 is profile of the present invention;
Fig. 2 is perspective view of the present invention;
Fig. 3 is vertical view of the present invention;
Fig. 4 is circuit connection diagram of the present invention;
In figure, sound wave distance detection module 1, switch 2, button 3, snoot 4, cylindrical shell 5, filter 6, LED lamp 7, front retainer plate 8, rear retainer plate 9, circuit board 10.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further illustrated.
As Figure 1-3, the present invention includes ultrasonic distance detection module 1, switch 2, button 3, snoot 4, cylindrical shell 5, filter 6, LED lamp 7, front retainer plate 8, rear retainer plate 9, circuit board 10, two joint No. 1 battery; Wherein, described ultrasonic distance detection module 1 is fixed on cylindrical shell 5 front portion; Front retainer plate 8 and cylindrical shell 5 front portion are threaded connection, be embedded with filter 6 in the middle part of front retainer plate 8, make light soft for focused ray; The anterior internal fixtion of cylindrical shell 5 has snoot 4, for converging light; LED lamp 7 is fixed bottom snoot 4; Two joints No. 1 battery is placed in cylindrical shell 5 inside; Be embedded with switch 2 and button 3 in the middle part of cylindrical shell 5, switch 2 is for control circuit break-make, and button 3 is for manual adjustments brightness; Cylindrical shell 5 rear portion and rear retainer plate 9 are by screw thread compact siro spinning technology; Circuit board 10 is embedded between cylindrical shell 5 front portion and snoot 4; Described two joints No. 1 battery is connected with circuit board 10 by switch 2; Ultrasonic distance detection module 1, button 3 are all connected with circuit board 10 with LED lamp 7.
As shown in Figure 4, circuit board 10 comprises main control module, power module and driver module; Wherein, described power module is all connected with main control module with driver module.
Described main control module comprises single-chip microcomputer U1, reset circuit and crystal oscillating circuit; Wherein, described reset circuit is reset button S2; Reset button S2 one end is connected with the reseting port of single-chip microcomputer, other end ground connection, when pressing reset button S2, and the reseting port ground connection of single-chip microcomputer U1, single-chip microcomputer U1 resets; Described crystal oscillating circuit comprises crystal oscillator XTAL, nonpolar electric capacity C2 and nonpolar electric capacity C3; Be connected with the first external clock input port of single-chip microcomputer after one end of described nonpolar electric capacity C2 is connected with one end of crystal oscillator XTAL, be connected with the second external clock input port of single-chip microcomputer after one end of nonpolar electric capacity C3 is connected with the other end of crystal oscillator XTAL; The other end of nonpolar electric capacity C2 and the equal ground connection of the other end of nonpolar electric capacity C3; Crystal oscillating circuit provides the crystal oscillator frequency needed for work for single-chip microcomputer U1; Described single-chip microcomputer U1 can adopt atmel corp's model to be the product of ATmega128, but is not limited thereto;
Described power module comprises voltage stabilizing chip U3 and electric capacity C1; Wherein, the input port of described voltage stabilizing chip U3 saves No. 1 battery of connecting through switch 2 (i.e. switch S 3) and two and is connected, the minus earth of two series connection No. 1 battery, then be input as 3V voltage, after voltage stabilizing chip U3 boosts, obtain 5V voltage at the output port of voltage stabilizing chip U3, be single-chip microcomputer U1 and each module for power supply; The grounding ports ground connection of voltage stabilizing chip U3; The output port of voltage stabilizing chip U3 is as power port, and it connects the power port of single-chip microcomputer U1 after being connected with one end of electric capacity C1; The other end ground connection of electric capacity C1; Described power module can adopt cloud brightness XL6009DC-DC boost module, but is not limited thereto;
Driver module comprises driving chip U4 and resistance R1; Wherein, Enable Pin and the output port exporting the termination voltage stabilizing chip U3 that powers of described driving chip U4, for controlling the output enable of driving chip U4; The digital voltage input port of driving chip U4 is connected with the PWM output port of single-chip microcomputer U1; The analog voltage output port of driving chip U4 is connected with one end of resistance R1, and the other end of resistance R1 is connected with the positive pole of LED lamp 7, the minus earth of LED lamp 7; The PWM output port of single-chip microcomputer U1 is connected by the PWM ripple of output different duty, controls the output voltage of the analog voltage output port of driving chip U4, thus changes loop current, control LED lamp 7 brightness; Described driver module can adopt L298N driver module, but is not limited thereto.
Ultrasonic distance detection module 1 is ultrasonic distance detection chip U2, and the control end (Trig end) of ultrasonic distance detection chip U2 is all connected with the I/O port of single-chip microcomputer U1 with receiving terminal (Echo holds); The power port of ultrasonic distance detection chip U2 is connected with the output port of voltage stabilizing chip U3; The grounding ports ground connection of ultrasonic distance detection chip U2; Single-chip microcomputer U1 sends the square wave of 8 40khz by I/O port automatically to the high level signal trigger module of the control end of ultrasonic distance detection chip U2 (Trig end) more than 10us, whether automatic detection has signal to return, when having signal to return, export a high level by the receiving terminal (Echo end) of ultrasonic distance detection chip U2, the time that receiving terminal (Echo end) the detection high level of ultrasonic distance detection chip U2 continues is exactly that ultrasonic wave is from being transmitted into the time returned; Described ultrasonic distance detection module can adopt model to be the product of HC-SR04, but is not limited thereto.
One end of button 3 (i.e. button S1) and the I/O port of single-chip microcomputer U1, the other end ground connection of button 3; When pressing the button 3, single-chip microcomputer U1 detects that level changes, thus the PWM ripple duty ratio that the PWM output port (PB4 port) changing single-chip microcomputer U1 exports, manual adjustments brightness can be realized.The power bracket of described LED lamp 7 is between 1W-3W.
The course of work of the present invention is as follows:
When Closing Switch 2 (i.e. switch S 3), major loop conducting, the 3V voltage feeding power module that two No. 1 serial battery provide, powers for main control module, ultrasonic distance detection module 1 and driver module after power module boosting.
The I/O port of single-chip microcomputer U1 sends the high level signal of a 15us to the control end of ultrasonic distance detection chip U2 (Trig end), now, ultrasonic distance detection module 1 works, and sends the square wave of 8 40khz, and whether detection has signal to return automatically; When there being signal to return, a high level is exported by the receiving terminal (Echo end) of ultrasonic distance detection chip U2, when the I/O Port detecting of single-chip microcomputer U1 sets high to level, start timer and carry out timing, the time that high level continues is exactly that ultrasonic wave is from being transmitted into the time returned.The distance between irradiating object and light source is calculated: distance=(the high level time * velocity of sound (340m/s))/2 according to timing result.According to the difference of distance length, the PWM output port of single-chip microcomputer U1 is connected the different PWM ripple of (PB4 port) output duty cycle, and irradiation distance longer then PWM ripple duty ratio is larger.Be connected PWM ripple that (PB4 port) export of the PWM output port of single-chip microcomputer U1 sends into the digital voltage input port of driving chip U4, the analog voltage output port of driving chip U4 exports the voltage mated with PWM duty ratio, and the resistance R1 through connecting, carry the electric current of corresponding size to LED lamp 7, maximum current is no more than 100mA, thus makes to produce the light that LED lamp 7 sends different brightness.If press the button 3, the I/O Port detecting of the single-chip microcomputer U1 be connected with one end of button 3 changes to level, then the PWM ripple duty ratio sent under all detecting distance is all multiplied by a scale factor k by single-chip microcomputer U1.Press the button 3 numbers to be respectively with corresponding scale factor k: k=1.5 when pressing 1 time, k=2 when pressing twice, k=0.5 when pressing No. 3 buttons 3, k=1 when pressing No. 4 buttons 3.Pressing No. 4 buttons 3 is a circulation, and number of times recalculates.Under achieving 4 kinds of different brightness conditions in this way, light intensity irradiation distance changes and automatically changes.
The light that LED lamp 7 sends, first collects through snoot 4, is converged for 6 two times, and make emergent ray softer by anterior filter.In the middle of lighting process, the every 100ms of single-chip microcomputer U1 controls ultrasonic distance detection module 1 and carries out once distance detection, and the change according to return value adjusts output intensity in real time, and when ensureing light source shake or distance change, illuminating effect is substantially constant.
Above-mentioned embodiment is used for explaining and the present invention is described, instead of limits the invention, and in the protection range of spirit of the present invention and claim, any amendment make the present invention and change, all fall into protection scope of the present invention.
Claims (3)
1. one kind changes the flashlight of automatically adjust light strength with irradiation distance, it is characterized in that, comprise ultrasonic distance detection module (1), switch (2), button (3), snoot (4), cylindrical shell (5), filter (6), LED lamp (7), front retainer plate (8), rear retainer plate (9), circuit board (10), two joints No. 1 battery; Wherein, described ultrasonic distance detection module (1) is fixed on cylindrical shell (5) front portion; Front retainer plate (8) and cylindrical shell (5) front portion are threaded connection, and front retainer plate (8) middle part is embedded with filter (6); Cylindrical shell (5) anterior internal fixtion has snoot (4); The fixing LED lamp (7) in snoot (4) bottom; No. 1 battery of two joint serial connections is placed in cylindrical shell (5) inside; Cylindrical shell (5) middle part is embedded with switch (2) and button (3); Cylindrical shell (5) rear portion and rear retainer plate (9) are by screw thread compact siro spinning technology; Circuit board (10) is embedded between cylindrical shell (5) front portion and snoot (4); Described two joints No. 1 battery is connected with circuit board (10) by switch (2); Ultrasonic distance detection module (1), button (3) are all connected with circuit board (10) with LED lamp (7).
2. the flashlight changing automatically adjust light strength with irradiation distance according to claim 1, it is characterized in that, described circuit board (10) comprises main control module, power module and driver module; Wherein, described power module is all connected with main control module with driver module;
Described main control module comprises single-chip microcomputer U1, reset circuit and crystal oscillating circuit; Wherein, described reset circuit is reset button S2; Reset button S2 one end is connected with the reseting port of single-chip microcomputer, other end ground connection; Described crystal oscillating circuit comprises crystal oscillator XTAL, nonpolar electric capacity C2 and nonpolar electric capacity C3; Be connected with the first external clock input port of single-chip microcomputer after one end of described nonpolar electric capacity C2 is connected with one end of crystal oscillator XTAL, be connected with the second external clock input port of single-chip microcomputer after one end of nonpolar electric capacity C3 is connected with the other end of crystal oscillator XTAL; The other end of nonpolar electric capacity C2 and the equal ground connection of the other end of nonpolar electric capacity C3;
Described power module comprises voltage stabilizing chip U3 and electric capacity C1; Wherein, the input port of described voltage stabilizing chip U3 saves No. 1 battery of connecting through switch (2) and two and is connected; The grounding ports ground connection of voltage stabilizing chip U3; The output port of voltage stabilizing chip U3 is as power port, and it connects the power port of single-chip microcomputer U1 after being connected with one end of electric capacity C1; The other end ground connection of electric capacity C1;
Described driver module comprises driving chip U4 and resistance R1; Wherein, described driving chip U4 Enable Pin and export feeder ear and all connect the output port of voltage stabilizing chip U3; The digital voltage input port of driving chip U4 is connected with the PWM output port of single-chip microcomputer U1; The analog voltage output port of driving chip U4 is connected with one end of resistance R1, and the other end of resistance R1 is connected with the positive pole of LED lamp (7), the minus earth of LED lamp (7);
Described ultrasonic distance detection module (1) is that the control end of ultrasonic distance detection chip U2, ultrasonic distance detection chip U2 is all connected with the I/O port of single-chip microcomputer U1 with receiving terminal; The power port of ultrasonic distance detection chip U2 is connected with the output port of voltage stabilizing chip U3; The grounding ports ground connection of ultrasonic distance detection chip U2;
One end of described button 3 is connected with the I/O port of single-chip microcomputer U1, the other end ground connection of button 3.
3. the flashlight changing automatically adjust light strength with irradiation distance according to claim 2, it is characterized in that, the power bracket of described LED lamp (7) is between 1W-3W.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511002490.XA CN105407615A (en) | 2015-12-28 | 2015-12-28 | Flashlight for automatically adjusting brightness with change of irradiation distance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511002490.XA CN105407615A (en) | 2015-12-28 | 2015-12-28 | Flashlight for automatically adjusting brightness with change of irradiation distance |
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| CN105407615A true CN105407615A (en) | 2016-03-16 |
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Cited By (4)
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| CN105974426A (en) * | 2016-05-20 | 2016-09-28 | 深圳展景世纪科技有限公司 | Eye protection method and device based on light emitting device |
| CN109595483A (en) * | 2018-12-28 | 2019-04-09 | 厦门东昂光电科技有限公司 | A kind of handheld illuminating device |
| US11441895B2 (en) | 2018-03-12 | 2022-09-13 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Control method, depth camera and electronic device |
| CN116709614A (en) * | 2023-08-02 | 2023-09-05 | 深圳爱图仕创新科技股份有限公司 | Light control method, light control device, computer equipment and computer readable storage medium |
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Application publication date: 20160316 |
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