CN111853581A - Desk lamp for detecting height of bracket and adjusting luminous flux and implementation method thereof - Google Patents

Desk lamp for detecting height of bracket and adjusting luminous flux and implementation method thereof Download PDF

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Publication number
CN111853581A
CN111853581A CN202010861564.XA CN202010861564A CN111853581A CN 111853581 A CN111853581 A CN 111853581A CN 202010861564 A CN202010861564 A CN 202010861564A CN 111853581 A CN111853581 A CN 111853581A
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China
Prior art keywords
height
luminous flux
bracket
desk lamp
lamp
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Pending
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CN202010861564.XA
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Chinese (zh)
Inventor
吴彬强
邹校炜
佘猷美
周朝阳
李正甲
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Hengdian Group Tospo Lighting Co Ltd
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Hengdian Group Tospo Lighting Co Ltd
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Priority to CN202010861564.XA priority Critical patent/CN111853581A/en
Publication of CN111853581A publication Critical patent/CN111853581A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S6/00—Lighting devices intended to be free-standing
    • F21S6/002—Table lamps, e.g. for ambient lighting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • F21V23/0442—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/06—Systems determining the position data of a target
    • G01S15/08—Systems for measuring distance only
    • 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
    • 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
    • H05B45/32—Pulse-control circuits
    • H05B45/325—Pulse-width modulation [PWM]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Abstract

The invention discloses a desk lamp for detecting the height of a bracket and adjusting luminous flux, which comprises a base, wherein a height adjusting bracket is arranged on one side above the base, and a lamp holder is arranged at the upper end of the height adjusting bracket; an ultrasonic transmitter, an ultrasonic receiver, a main controller, a light source driver and a light source are arranged inside the lamp cap, and a voltage reducer is arranged inside the base, wherein the main controller and the light source driver are respectively connected with the voltage reducer, the ultrasonic transmitter and the ultrasonic receiver are respectively connected with the main controller, and the light source driver is connected with the light source; the invention also discloses a realization method of the desk lamp for detecting the height of the bracket and adjusting the luminous flux. The invention can adjust the luminous flux of the light source according to the height of the lamp holder, solves the problem that the brightness can not be automatically adjusted according to the height in the prior art, and reduces the energy consumption of the desk lamp; the brightness of the irradiated surface of the invention is uniform, the eyestrain of a user can be relieved, and the invention has good economic benefit and application prospect.

Description

Desk lamp for detecting height of bracket and adjusting luminous flux and implementation method thereof
Technical Field
The invention belongs to the technical field of table lamps, and particularly relates to a table lamp for detecting height of a bracket and adjusting luminous flux and an implementation method thereof.
Background
Along with the improvement of living standard and the attention to health of people, the requirements of people on the table lamp are higher and higher, the height of a bracket of the table lamp is required to be adjusted, and the brightness of the table lamp is required to be changed when the height is required to be changed, so that the relative brightness of the table lamp on a table top is constant, and the crowding state of the table top is reduced. Most of the table lamps in the market can only adjust the height of the table lamp and cannot automatically adjust the brightness of the table lamp along with the height of the table lamp, so that the brightness value of the table lamp irradiated on a table top cannot keep a relatively stable value; or only the brightness can be adjusted without changing the height of the bracket. Therefore, the prior art has the following defects:
1. the LED driving current is consistent, and the brightness of part of LEDs cannot be adjusted independently.
2. The brightness of the irradiated surface is not uniform at different heights, and the brightness of the irradiated surface cannot be automatically adjusted along with the difference of the heights, so that the output luminous flux of the desk lamp is adjusted.
Disclosure of Invention
The invention aims to provide a desk lamp for detecting the height of a bracket and adjusting the luminous flux so as to solve the problems in the prior art. The desk lamp with the adjustable luminous flux for detecting the height of the bracket has the characteristic that the luminous flux of a light source can be adjusted according to the height of the lamp holder.
The invention also aims to provide a realization method of the desk lamp for detecting the height of the bracket and adjusting the luminous flux.
In order to achieve the purpose, the invention provides the following technical scheme: a desk lamp for detecting the height of a bracket and adjusting luminous flux comprises a base, wherein a height adjusting bracket is arranged on one side above the base, and a lamp holder is arranged at the upper end of the height adjusting bracket;
in the invention, an ultrasonic transmitter, an ultrasonic receiver, a main controller, a light source driver and a light source are arranged inside the lamp cap, and a voltage reducer is arranged inside the base, wherein the main controller and the light source driver are respectively connected with the voltage reducer, the ultrasonic transmitter and the ultrasonic receiver are respectively connected with the main controller, and the light source driver is connected with the light source.
In the invention, the height adjusting bracket further comprises an upper pipe, a knob and a lower pipe, wherein the lower pipe is arranged above the base, the upper pipe is embedded in the lower pipe and is in sliding connection with the lower pipe, the knob is meshed at the upper end of the lower pipe, and the end part of the knob is abutted against the outer wall of the upper pipe.
In the invention, the lower tube and the base as well as the lamp holder and the upper tube are respectively connected in a rotating way through damping rotating shafts.
Further, the method for implementing the table lamp capable of adjusting the luminous flux by detecting the height of the bracket comprises the following steps:
when the height needs to be adjusted, the knob is unscrewed, the upper pipe is adjusted to enable the lamp holder to move to a needed position, and then the knob is screwed down to fix the upper pipe, so that the position of the lamp holder is fixed;
secondly, or the height or angle of the lamp holder is adjusted by adjusting the included angle between the lower tube and the base or the included angle between the lamp holder and the upper tube;
when the lamp holder is adjusted to a certain height, the main controller detects the height between the lamp holder and the irradiation surface;
and (IV) adjusting the luminous flux of the light source according to the height between the lamp cap and the irradiation surface.
In the invention, further, in the step (three), the method for detecting the height between the lamp head and the irradiation surface adopts a round-trip time detection method;
further in the present invention, the calculation formula in step (three) is: h is T × V/2, where H is the height of the lamp head from the irradiation surface, T is the time difference between the emission of the ultrasonic transmitter and the reception of the ultrasonic receiver, V is 331.4+0.607 × Tc, and Tc is the ambient temperature;
further, in the present invention, in the step (four), the method for adjusting the luminous flux adopts a PWM dimming method;
further in the present invention, the PWM dimming method comprises:
(a) according to the relationship between luminous flux and illumination intensity:
Figure BDA0002648317510000031
(b) obtained according to the formula
Figure BDA0002648317510000032
(c) Obtained according to the formula
Figure BDA0002648317510000033
Figure BDA0002648317510000034
(d) Obtained according to the formula
Figure BDA0002648317510000035
(e) And obtaining the proportional relation between the luminous flux and the PWM according to the formula, and obtaining that the PWM duty ratio is H1 (H1) when the height H1 is obtained2/Hmax2；
Further in the present invention, in the method (a), E is illuminance,
Figure BDA0002648317510000036
is the luminous flux, S is the unit area;
further in the present invention, in the method (b),
Figure BDA0002648317510000037
is the maximum luminous flux when the desk lamp PWM outputs 100%,
Figure BDA0002648317510000038
luminous flux at height H1, Es is an angle
Figure BDA0002648317510000039
The illuminance per unit area of (1), S1 and S2 are angles
Figure BDA00026483175100000310
Unit area of (a).
Compared with the prior art, the invention has the beneficial effects that:
1. the invention can adjust the luminous flux of the light source according to the height of the lamp holder, solves the problem that the brightness can not be automatically adjusted according to the height in the prior art, and reduces the energy consumption of the desk lamp;
2. the brightness of the irradiated surface of the invention is uniform, the eyestrain of a user can be relieved, and the invention has good economic benefit and application prospect.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged schematic view of FIG. 1 at A according to the present invention;
FIG. 3 is a schematic diagram of the connection of components of the present invention;
FIG. 4 is a diagram illustrating the relationship of formulas in the present invention;
in the figure: 1. a base; 2. a height adjustment bracket; 21. feeding a pipe; 22. a knob; 23. a lower pipe; 3. a lamp cap; 4. a pressure reducer; 5. an ultrasonic transmitter; 6. an ultrasonic receiver; 7. a main controller; 8. a light source driver; 9. a light source.
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.
Example 1
Referring to fig. 1-4, the present invention provides the following technical solutions: a desk lamp for detecting the height of a bracket and adjusting luminous flux comprises a base 1, wherein a height adjusting bracket 2 is arranged on one side above the base 1, and a lamp holder 3 is arranged at the upper end of the height adjusting bracket 2;
the inside of lamp holder 3 is equipped with ultrasonic transmitter 5, ultrasonic receiver 6, main control unit 7, light source driver 8 and light source 9, and the inside of base 1 disposes step-down transformer 4, and wherein, main control unit 7 and light source driver 8 are connected with step-down transformer 4 respectively, and ultrasonic transmitter 5 and ultrasonic receiver 6 are connected with main control unit 7 respectively, and light source driver 8 is connected with light source 9.
Further, the method for implementing the table lamp capable of adjusting the luminous flux by detecting the height of the bracket comprises the following steps:
when the height needs to be adjusted, the knob 22 is unscrewed, the upper pipe 21 is adjusted to move the lamp holder 3 to a required position, and then the knob 22 is screwed down to fix the upper pipe 21, so that the position of the lamp holder 3 is fixed;
(II) or adjusting the height or angle of the lamp holder 3 by adjusting the included angle between the lower tube 23 and the base 1 or the included angle between the lamp holder 3 and the upper tube 21;
thirdly, when the lamp holder 3 is adjusted to a certain height, the main controller 7 detects the height between the lamp holder 3 and the irradiation surface;
and (IV) adjusting the luminous flux of the light source 9 according to the height between the lamp cap 3 and the irradiation surface.
In the invention, in the step (three), the method for detecting the height between the lamp head 3 and the irradiation surface adopts a round-trip time detection method;
further in the present invention, the calculation formula in step (three) is: h is T × V/2, where H is the height of the lamp head 3 from the irradiation surface, T is the time difference between the emission of the ultrasonic transmitter 5 and the reception of the ultrasonic receiver 6, V is 331.4+0.607 × Tc, and Tc is the ambient temperature;
further, in the present invention, in the step (four), the method for adjusting the luminous flux adopts a PWM dimming method;
further in the present invention, the PWM dimming method comprises:
(a) according to the relationship between luminous flux and illumination intensity:
Figure BDA0002648317510000051
(b) obtained according to the formula
Figure BDA0002648317510000052
(c) Obtained according to the formula
Figure BDA0002648317510000053
Figure BDA0002648317510000054
(d) Obtained according to the formula
Figure BDA0002648317510000055
(e) And obtaining the proportional relation between the luminous flux and the PWM according to the formula, and obtaining that the PWM duty ratio is H1 (H1) when the height H1 is obtained2/Hmax2；
Further in the present invention, in the method (a), E is illuminance,
Figure BDA0002648317510000056
is the luminous flux, S is the unit area;
further in the present invention, in the method (b),
Figure BDA0002648317510000057
is the maximum luminous flux when the desk lamp PWM outputs 100%,
Figure BDA0002648317510000058
luminous flux at height H1, Es is an angle
Figure BDA0002648317510000059
The illuminance per unit area of (1), S1 and S2 are angles
Figure BDA00026483175100000510
Unit area of (a).
Example 2
The present embodiment is different from embodiment 1 in that: height adjustment support 2 includes upper tube 21, knob 22 and low tube 23, and wherein, low tube 23 sets up in the top of base 1, and upper tube 21 imbeds in the inside of low tube 23, and with low tube 23 sliding connection, the upper end meshing of low tube 23 has knob 22, and knob 22's tip is contradicted with the outer wall of upper tube 21.
By adopting the technical scheme, the height of the lamp holder 3 is adjusted by adjusting the position of the upper tube 21.
Example 3
The present embodiment is different from embodiment 1 in that: the lower tube 23 and the base 1 and the lamp head 3 and the upper tube 21 are rotatably connected through damping rotating shafts respectively.
By adopting the technical scheme, the height or angle of the lamp holder 3 can be adjusted by adjusting the included angle between the lower tube 23 and the base 1 or the included angle between the lamp holder 3 and the upper tube 21.
The voltage reducer 4 in the invention is preferably a BP8519C chip; the ultrasonic transmitter 5 and the ultrasonic receiver 6 are preferably of the T/R40-15 type; the main controller 7 is preferably an STM32 singlechip; the light source driver 8 is preferably an MBI6656 chip.
Examples of the experiments
Defining the highest height adjusting point Hmax0.8m of the desk lamp; the highest output luminous flux is 1200 lm;
when the lamp head 3 is adjusted to a certain height, the main controller 7 counts the time difference T from the signal transmitted by the ultrasonic transmitter 5 to the signal received by the ultrasonic receiver 6 to be 2.8ms, and takes the value 346.575 according to the H ═ T × V/2 and the theoretical value H ═ 0.49m according to the PWM (H1) ═ H12/Hmax2The duty cycle theoretical value output is 37%.
The measured height is 0.5m, the measured luminous flux is 450LM, which is 37.5% of the maximum luminous flux, and the design requirement is met.
In conclusion, the luminous flux of the light source can be adjusted according to the height of the lamp cap, the problem that the brightness cannot be automatically adjusted according to the height in the prior art is solved, and the energy consumption of the desk lamp is reduced; the brightness of the irradiated surface of the invention is uniform, the eyestrain of a user can be relieved, and the invention has good economic benefit and application prospect.
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 a detect desk lamp of support altitude mixture control luminous flux, includes base (1), its characterized in that: a height adjusting bracket (2) is arranged on one side above the base (1), and a lamp holder (3) is arranged at the upper end of the height adjusting bracket (2);
the inside of lamp holder (3) is equipped with ultrasonic transmitter (5), ultrasonic receiver (6), main control unit (7), light source driver (8) and light source (9), and the inside of base (1) disposes step-down transformer (4), and wherein, main control unit (7) and light source driver (8) are connected with step-down transformer (4) respectively, and ultrasonic transmitter (5) and ultrasonic receiver (6) are connected with main control unit (7) respectively, and light source driver (8) are connected with light source (9).
2. The desk lamp of claim 1, wherein the desk lamp comprises: altitude mixture control support (2) include top tube (21), knob (22) and low tube (23), and wherein, low tube (23) set up in the top of base (1), and top tube (21) embedding is in the inside of low tube (23), and with low tube (23) sliding connection, the upper end meshing of low tube (23) has knob (22), and the tip of knob (22) is contradicted with the outer wall of top tube (21).
3. A desk lamp for detecting height-adjusted luminous flux of a stand as set forth in claim 2, wherein: the lower tube (23) and the base (1) and the lamp holder (3) and the upper tube (21) are respectively connected in a rotating way through damping rotating shafts.
4. A desk lamp with a height adjustable light flux detecting bracket according to any one of claims 1-3, comprising the following steps:
when the height needs to be adjusted, the knob (22) is unscrewed, the upper pipe (21) is adjusted to enable the lamp holder (3) to move to a needed position, and then the knob (22) is screwed down to fix the upper pipe (21), so that the position of the lamp holder (3) is fixed;
secondly, or the height or angle of the lamp holder (3) is adjusted by adjusting the included angle between the lower tube (23) and the base (1) or the included angle between the lamp holder (3) and the upper tube (21);
when the lamp holder (3) is adjusted to a certain height, the main controller (7) detects the height between the lamp holder (3) and the irradiation surface;
and (IV) adjusting the luminous flux of the light source (9) according to the height between the lamp cap (3) and the irradiation surface.
5. The method for realizing the desk lamp capable of adjusting the luminous flux by detecting the height of the bracket as claimed in claim 4, wherein the method comprises the following steps: in the step (III), a round-trip time detection method is adopted as a method for detecting the height between the lamp holder (3) and the irradiation surface.
6. The method for realizing the desk lamp capable of adjusting the luminous flux by detecting the height of the bracket as claimed in claim 5, is characterized in that: the calculation formula in the step (three) is as follows: h is T V/2, wherein H is the height of the lamp holder (3) from the irradiation surface, T is the time difference from the signal transmitted by the ultrasonic transmitter (5) to the signal received by the ultrasonic receiver (6), V is 331.4+0.607 Tc, and Tc is the ambient temperature.
7. The method for realizing the desk lamp capable of adjusting the luminous flux by detecting the height of the bracket as claimed in claim 4, wherein the method comprises the following steps: in the step (IV), the method for adjusting the luminous flux adopts a PWM dimming method.
8. The method for implementing a desk lamp with a height-adjustable light flux bracket according to claim 7, wherein the method comprises the following steps: the PWM dimming method comprises the following steps:
(a) according to the relationship between luminous flux and illumination intensity:
Figure FDA0002648317500000021
(b) obtained according to the formula
Figure FDA0002648317500000022
(c) Obtained according to the formula
Figure FDA0002648317500000023
Figure FDA0002648317500000024
(d) Obtained according to the formula
Figure FDA0002648317500000025
(e) And obtaining the proportional relation between the luminous flux and the PWM according to the formula, and obtaining that the PWM duty ratio is H1 (H1) when the height H1 is obtained2/Hmax2。
9. The method for implementing a desk lamp with a height-adjustable light flux bracket according to claim 8, wherein the method comprises the following steps: in the method (a), E is the illuminance,
Figure FDA0002648317500000026
s is a unit area.
10. The method for implementing a desk lamp with a height-adjustable light flux bracket according to claim 8, wherein the method comprises the following steps: in the method (b), the step of (c),
Figure FDA0002648317500000031
is the maximum luminous flux when the desk lamp PWM outputs 100%,
Figure FDA0002648317500000032
luminous flux at height H1, Es is an angle
Figure FDA0002648317500000033
The illuminance per unit area of (1), S1 and S2 are angles
Figure FDA0002648317500000034
Unit area of (a).
CN202010861564.XA 2020-08-25 2020-08-25 Desk lamp for detecting height of bracket and adjusting luminous flux and implementation method thereof Pending CN111853581A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005259437A (en) * 2004-03-10 2005-09-22 Mitsubishi Electric Corp Table lamp
CN102625546A (en) * 2012-04-18 2012-08-01 张家炎 Automatic dimming constant light control system
CN104735869A (en) * 2015-03-09 2015-06-24 江苏建筑职业技术学院 Lamplight control system based on vision comfort level and control method
CN110324940A (en) * 2019-07-27 2019-10-11 深圳市仰光照明设计有限公司 A kind of lamps and lanterns intelligence control system
CN110622623A (en) * 2017-05-15 2019-12-27 昕诺飞控股有限公司 Illumination system capable of maintaining a blackcurrant lux level at an eye regardless of a distance from a user
CN212319480U (en) * 2020-08-25 2021-01-08 横店集团得邦照明股份有限公司 Desk lamp for detecting height adjustment luminous flux of bracket

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005259437A (en) * 2004-03-10 2005-09-22 Mitsubishi Electric Corp Table lamp
CN102625546A (en) * 2012-04-18 2012-08-01 张家炎 Automatic dimming constant light control system
CN104735869A (en) * 2015-03-09 2015-06-24 江苏建筑职业技术学院 Lamplight control system based on vision comfort level and control method
CN110622623A (en) * 2017-05-15 2019-12-27 昕诺飞控股有限公司 Illumination system capable of maintaining a blackcurrant lux level at an eye regardless of a distance from a user
CN110324940A (en) * 2019-07-27 2019-10-11 深圳市仰光照明设计有限公司 A kind of lamps and lanterns intelligence control system
CN212319480U (en) * 2020-08-25 2021-01-08 横店集团得邦照明股份有限公司 Desk lamp for detecting height adjustment luminous flux of bracket

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