CN218634350U - Detection circuit for mobile lighting equipment - Google Patents
Detection circuit for mobile lighting equipment Download PDFInfo
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- CN218634350U CN218634350U CN202222599802.1U CN202222599802U CN218634350U CN 218634350 U CN218634350 U CN 218634350U CN 202222599802 U CN202222599802 U CN 202222599802U CN 218634350 U CN218634350 U CN 218634350U
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- 238000001514 detection method Methods 0.000 title claims abstract description 55
- 230000009467 reduction Effects 0.000 claims abstract description 37
- 238000004146 energy storage Methods 0.000 claims abstract description 17
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 230000035807 sensation Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 2
- 239000003990 capacitor Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 7
- 230000004907 flux Effects 0.000 description 2
- 101100489717 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) GND2 gene Proteins 0.000 description 1
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Abstract
The utility model belongs to the technical field of the electronic circuit, a detection circuitry for removing lighting apparatus is related to, include: the LED lamp voltage-reducing circuit comprises a DC-DC voltage-reducing circuit, a constant current circuit, a control chip and a voltage-reducing detection circuit, wherein the voltage input end of the DC-DC voltage-reducing circuit is used for being connected with the energy storage battery, the voltage output end of the DC-DC voltage-reducing circuit is used for being connected with an LED lamp, the constant current circuit is connected with the feedback end of the DC-DC voltage-reducing circuit, the voltage-reducing detection circuit is connected with the voltage output end of the DC-DC voltage-reducing circuit, and the control chip is simultaneously connected with the DC-DC voltage-reducing circuit, the constant current circuit and the voltage-reducing detection circuit. The method has the advantage that the condition that the mobile lighting equipment cannot be adjusted when the brightness is switched due to the fact that whether the set brightness reaches the set value or not cannot be judged when the voltage reduction chip works in the straight-through area can be avoided.
Description
Technical Field
The utility model belongs to the technical field of the electronic circuit, a detection circuitry for removing lighting apparatus is related to.
Background
In a common mobile lighting device driving LED circuit, when DC-DC voltage reduction is used, the working state of a DC voltage reduction chip cannot be accurately detected in the process of battery power reduction, so that the actual value of LED brightness (luminous flux or current) in the current state cannot be judged, the theoretical output brightness (luminous flux or current) is changed when the brightness is switched, and actually, as the DC chip works in a direct-connection area (the DC chip works in a voltage reduction area when a battery is fully charged, the conduction voltage value of the LED can be reached, and the maximum brightness is output; in another circuit with the application of the photosensitive sensor, when an object is shielded in front of the mobile lighting equipment, the brightness needs to be reduced, and the safety is improved; if the actual brightness of the LED is not the set value at the moment, the circuit cannot accurately judge under the shielding condition, and the brightness of the head of the mobile lighting equipment cannot be reduced when the head of the mobile lighting equipment is shielded, so that the potential safety hazard of the mobile lighting equipment in use is increased.
Disclosure of Invention
An object of the utility model is to prior art not enough, provide a detection circuitry for mobile lighting equipment, can avoid step-down chip because can't judge the luminance of settlement and whether reach the setting value at direct district during operation, and lead to the mobile lighting equipment unable condition of adjusting to appear when switching luminance.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a detection circuit for a mobile lighting device, comprising: the LED lamp voltage-reducing circuit comprises a DC-DC voltage-reducing circuit, a constant current circuit, a control chip and a voltage-reducing detection circuit, wherein the voltage input end of the DC-DC voltage-reducing circuit is used for being connected with the energy storage battery, the voltage output end of the DC-DC voltage-reducing circuit is used for being connected with an LED lamp, the constant current circuit is connected with the feedback end of the DC-DC voltage-reducing circuit, the voltage-reducing detection circuit is connected with the voltage output end of the DC-DC voltage-reducing circuit, and the control chip is simultaneously connected with the DC-DC voltage-reducing circuit, the constant current circuit and the voltage-reducing detection circuit.
Further, the DC-DC voltage reduction circuit includes: the model of the voltage reduction chip is MT3128.
Further, the step-down detection circuit includes: the power supply circuit comprises a first MOS tube Q1 and an eleventh resistor, wherein the source electrode of the first MOS tube Q1 is used for being connected with the positive connecting end of the energy storage battery, the grid electrode of the first MOS tube is connected with the voltage output end of the DC-DC voltage reduction circuit, the drain electrode of the first MOS tube is connected with the first end of the eleventh resistor, the second end of the eleventh resistor is grounded, and the connecting end between the drain electrode of the first MOS tube and the eleventh resistor is connected with the voltage detection end of the control chip.
Further, the detection circuit further includes: and the light sensation detection circuit is connected with the control chip.
Further, the detection circuit further includes: the input end of the linear voltage stabilizing circuit is connected with the energy storage battery, and the output end of the linear voltage stabilizing circuit is connected with the voltage input end of the control chip.
Further, the detection circuit further includes: and the switching circuit is connected with the control chip.
Further, the model of the control chip is SC92L8532.
The utility model has the advantages that:
through the arrangement of the voltage reduction detection circuit, when the mobile lighting equipment works, the voltage reduction detection circuit can detect a voltage signal of a voltage output end of the DC-DC voltage reduction circuit and send the voltage signal to the control chip, so that the control chip can judge the working state of the DC-DC voltage reduction circuit and output a corresponding control signal to adjust the output brightness of the LED lamp, and the situation that the mobile lighting equipment cannot be adjusted when the brightness is switched due to the fact that whether the set brightness reaches a set value or not when the voltage reduction chip works in a direct connection area is avoided.
Drawings
FIG. 1 is a schematic diagram of a DC-DC step-down circuit according to the present invention;
FIG. 2 is a schematic diagram of the constant current circuit of the present invention;
FIG. 3 is a schematic diagram of the voltage drop detection circuit of the present invention;
FIG. 4 is a schematic diagram of the optical sensing circuit of the present invention;
FIG. 5 is a schematic diagram of the middle linear voltage regulator circuit of the present invention;
FIG. 6 is a schematic diagram of a control chip according to the present invention;
fig. 7 is a schematic diagram of the switching circuit according to the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as fixed or detachable connections or as an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Referring to fig. 1, 2, 3 and 6, a detection circuit for a mobile lighting device includes: the LED lamp voltage-reducing circuit comprises a DC-DC voltage-reducing circuit, a constant current circuit, a control chip U4 and a voltage-reducing detection circuit, wherein the voltage input end of the DC-DC voltage-reducing circuit is used for being connected with the energy storage battery, the voltage output end of the DC-DC voltage-reducing circuit is used for being connected with an LED lamp, the constant current circuit is connected with the feedback end of the DC-DC voltage-reducing circuit, the voltage-reducing detection circuit is connected with the voltage output end of the DC-DC voltage-reducing circuit, and the control chip U4 is simultaneously connected with the DC-DC voltage-reducing circuit, the constant current circuit and the voltage-reducing detection circuit. In this embodiment, the model of the control chip U4 is SC92L8532.
Through setting up the step-down detection circuit for mobile lighting equipment is at the during operation, step-down detection circuit can detect the voltage signal of DC-DC step-down circuit voltage output end, and send voltage signal to control chip U4, make control chip can judge the operating condition of DC-DC step-down circuit, and output corresponding control signal and adjust the output luminance of LED lamp, thereby avoid the step-down chip because can't judge whether the luminance of settlement reaches the setting value when the through area is worked, lead to mobile lighting equipment to appear the unable condition of adjusting when switching luminance.
In one embodiment, referring to fig. 1, the DC-DC voltage reduction circuit includes: the LED lamp voltage reduction circuit comprises a voltage reduction chip U1, wherein an input end IN of the voltage reduction chip U1 is connected with a positive connecting end BAT + of an energy storage battery, a capacitor C3, a capacitor C2 and a capacitor C1 are sequentially connected between the input end IN of the voltage reduction chip U1 and the positive connecting end of the energy storage battery, the other ends of the capacitor C3, the capacitor C2 and the capacitor C1 are all grounded, a pin AVIN 1 of the voltage reduction chip U1 is connected with a capacitor C4 and then grounded, a pin PG 20 of the voltage reduction chip U1 is connected with a resistor R1 and then grounded, a pin AGND 5 of the voltage reduction chip U1, a pin GND 9, a pin GND 10, a pin GND2 and a pin GND 17 are all grounded, a pin SS 3 of the voltage reduction chip U1 is connected with a capacitor C5 and then grounded, a voltage output end SW of the voltage reduction chip U1 is connected with an anode of the LED lamp after being connected with the inductor L1, a capacitor C6, a capacitor C7 and a capacitor C8 are sequentially connected between the other end FB 3 and the other end FB 3 of the voltage reduction chip and the resistor R3 are connected with a feedback resistor FB 3, and the other end FB 3 of the constant current feedback resistor R2 of the voltage reduction chip. In this embodiment, the model of the voltage reduction chip is MT3128.
In one embodiment, referring to fig. 2, the constant current circuit includes: amplifier U2, be connected with the negative pole link of LED lamp behind amplifier U2's the 1 st link connecting resistance R6, still be connected with resistance R10 behind the resistance R6 between the negative pole link of LED lamp, resistance R10's other end ground connection, amplifier U2's No. 2 link ground connection, amplifier U2's No. 3 link is connecting resistance R8 in proper order, be connected with control chip U4's pulse width modulation end P2.4 behind the resistance R7, still connect gradually resistance R9 and electric capacity C11 between amplifier U2's No. 3 link and the resistance R8, resistance R9 and electric capacity C11's the other end all ground connection, still be connected with electric capacity C12 between resistance R8 and the resistance R7, electric capacity C12's the other end ground connection.
In one embodiment, the step-down detection circuit includes: the power supply circuit comprises a first MOS tube Q1 and an eleventh resistor R11, wherein the source electrode of the first MOS tube Q1 is used for being connected with the positive connecting end of the energy storage battery, the grid electrode of the first MOS tube Q1 is connected with the voltage output end of the DC-DC step-down circuit, the drain electrode of the first MOS tube Q1 is connected with the first end of the eleventh resistor R11, the second end of the eleventh resistor R11 is grounded, and the connecting end between the drain electrode of the first MOS tube Q1 and the eleventh resistor R11 is connected with the voltage detection end P2.5 of the control chip U4.
When dimming: the long press switch SW can adjust the switching of the LEDs between different brightnesses, when the voltage of the energy storage battery can provide enough electric quantity to support the LED lamp to normally switch all brightnesses, the voltage output end SW of the voltage reduction chip U1 is connected to the grid electrode of the first MOS tube Q1, the source electrode of the first MOS tube Q1 is connected with the positive connecting end BAT + of the energy storage battery, the drain electrode of the first MOS tube Q1 is connected to one end of an eleventh resistor R11 and is simultaneously connected to the voltage detection end P2.5 of the control chip U4, when the voltage detection end P2.5 of the control chip U4 is at a high level and a low level, the voltage reduction chip U1 is judged to work in a voltage reduction state, when the electric quantity of the energy storage battery cannot support all brightnesses, particularly the highest brightness, the voltage reduction chip U1 works in a through state, the voltage output end SW of the voltage reduction chip U1 is at a high level, therefore the grid electrode of the first MOS Q1 is not conducted, the drain electrode of the first MOS Q1 is connected to a low level through the other end of the eleventh resistor R11, the control chip U4 is detected by the voltage detection end P2.5, the stable pulse width reaches the low level, the pulse width, the pulse output voltage is judged to be not reduced from the brightness, the brightness of the brightness is judged to be reduced by the brightness, and the brightness of the current brightness is controlled by the brightness, and the brightness is reduced by the brightness, and the brightness is controlled by the brightness is not reduced by the brightness, and the brightness is not reduced by the brightness is judged to be reduced by the brightness, and the brightness is not reduced by the brightness of the brightness.
In one embodiment, referring to fig. 4, the detection circuit further includes: and the light sensation detection circuit is connected with the control chip. Specifically, the polished rod detection circuit includes: photosensitive sensor U5, no. 12 pins P2.6 of photosensitive sensor U5's No. 1 pin VOUT connection control chip U4, photosensitive sensor U5's No. 1 pin VOUT still is connected with resistance R13, resistance R13's other end ground connection, photosensitive sensor U5's No. 2 pin VCC connection control chip U4's No. 17 pin P0.5, photosensitive sensor U5's No. 3 pin G1 and No. 4 pin G2 all ground connection, and establish ties with photosensitive sensor U5's No. 1 pin VOUT behind No. 3 pin G1 of photosensitive sensor U5 and No. 4 pin G2's the end connection resistance R12 that is connected.
When an object is shielded in front of the mobile lighting equipment, the control chip U4 detects that the voltage reduction chip works in a voltage reduction state or a direct-connection state once, when the mobile lighting equipment works in the voltage reduction state, if a shielding object exists in front of the mobile lighting equipment at the moment, the light sensation detection circuit outputs different voltage signals (the No. 1 pin VOUT outputs different voltages when the photosensitive sensor U5 does or does not have the shielding object and is connected to the No. 12 pin P2.6 of the control chip U4, and the control chip U4 detects the voltage to judge whether the shielding object exists or not) and can accurately judge whether the shielding object exists or not according to a voltage value preset by a program at the moment; when the mobile lighting device works in a direct-through state, the control chip U4 controls the pulse width modulation end P2.4 to output a frequency, the duty ratio is decreased from 100% until the voltage reduction state is judged, the control chip U4 controls the duty ratio of the pulse width modulation end P2.4 to be kept unchanged (another voltage value is preset for the duty ratio by a program), if a shielding object exists in front of the mobile lighting device at the moment, the light sensation detection circuit outputs different voltage signals, the control chip U4 compares and judges the shielding object, the brightness is accurately detected, and therefore the safe brightness is reduced, and the potential safety hazard of the mobile lighting device in use is reduced.
In one embodiment, referring to fig. 5, the detection circuit further includes: and the input end of the linear voltage stabilizing circuit is connected with the energy storage battery, and the output end of the linear voltage stabilizing circuit is connected with the voltage input end of the control chip. Specifically, the linear voltage regulator circuit includes: linear voltage regulation chip U3, the positive link BAT + of energy storage battery is connected to linear voltage regulation chip U3's voltage input end VIN, linear voltage regulation chip U3's earthing terminal GND ground connection, linear voltage regulation chip U3's voltage output end OUT connects control chip's voltage input end VDD, linear voltage regulation chip U3's voltage input end VIN still connects behind the electric capacity C13 and is connected with linear voltage regulation chip U3's earthing terminal GND, linear voltage regulation chip U3's voltage output department VOUT still connects behind electric capacity C14 and is connected with linear voltage regulation chip U3's earthing terminal GND, be connected with diode D1 between linear voltage regulation chip U3's voltage input end VIN and the positive link of energy storage battery.
In one embodiment, referring to fig. 7, the detection circuit further includes: and the switching circuit is connected with the control chip. Specifically, the switching circuit includes: one end of the switch SW1 is grounded, and the other end of the switch SW1 is connected with a No. 15 pin P2.1 of the control chip U1.
The above-mentioned embodiments are only one of the preferred embodiments of the present invention, and the general changes and substitutions performed by those skilled in the art within the technical scope of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A detection circuit for a mobile lighting device, comprising: the LED lamp voltage-reducing circuit comprises a DC-DC voltage-reducing circuit, a constant current circuit, a control chip and a voltage-reducing detection circuit, wherein the voltage input end of the DC-DC voltage-reducing circuit is used for being connected with an energy storage battery, the voltage output end of the DC-DC voltage-reducing circuit is used for being connected with an LED lamp, the constant current circuit is connected with the feedback end of the DC-DC voltage-reducing circuit, the voltage-reducing detection circuit is connected with the voltage output end of the DC-DC voltage-reducing circuit, and the control chip is simultaneously connected with the DC-DC voltage-reducing circuit, the constant current circuit and the voltage-reducing detection circuit.
2. The detection circuit for a mobile lighting device according to claim 1, wherein the DC-DC voltage reduction circuit comprises: the model of the voltage reduction chip is MT3128.
3. A detection circuit for a mobile lighting device according to claim 1, wherein the buck detection circuit comprises: the source electrode of the first MOS tube is used for being connected with the positive connecting end of the energy storage battery, the grid electrode of the first MOS tube is connected with the voltage output end of the DC-DC step-down circuit, the drain electrode of the first MOS tube is connected with the first end of the eleventh resistor, the second end of the eleventh resistor is grounded, and the connecting end between the drain electrode of the first MOS tube and the eleventh resistor is connected with the voltage detection end of the control chip.
4. A detection circuit for a mobile lighting device according to any one of claims 1-3, wherein the detection circuit further comprises: and the light sensation detection circuit is connected with the control chip.
5. A detection circuit for a mobile lighting device according to claim 1, wherein the detection circuit further comprises: and the input end of the linear voltage stabilizing circuit is connected with the energy storage battery, and the output end of the linear voltage stabilizing circuit is connected with the voltage input end of the control chip.
6. A detection circuit for a mobile lighting device according to claim 1, wherein the detection circuit further comprises: and the switching circuit is connected with the control chip.
7. The detection circuit for the mobile lighting device, as set forth in claim 1, wherein the control chip is model number SC92L8532.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222599802.1U CN218634350U (en) | 2022-09-30 | 2022-09-30 | Detection circuit for mobile lighting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222599802.1U CN218634350U (en) | 2022-09-30 | 2022-09-30 | Detection circuit for mobile lighting equipment |
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| Publication Number | Publication Date |
|---|---|
| CN218634350U true CN218634350U (en) | 2023-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222599802.1U Active CN218634350U (en) | 2022-09-30 | 2022-09-30 | Detection circuit for mobile lighting equipment |
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| Country | Link |
|---|---|
| CN (1) | CN218634350U (en) |
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- 2022-09-30 CN CN202222599802.1U patent/CN218634350U/en active Active
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Address after: Building 2, Cuiheng International Science and Technology Innovation Center, No. 21 Beichen Road, Cuiheng New District, Zhongshan City, Guangdong Province, 528400, 604 Patentee after: Aolei Technology Group Co.,Ltd. Country or region after: China Address before: Room 527, Unit 1, Building 2, Qian'an Garden, No. 18 Cuicheng Road, Cuiheng New District, Nanlang Street, Zhongshan City, Guangdong Province, 528400 Patentee before: Zhongshan Aolei Technology Co.,Ltd. Country or region before: China Address after: Room 527, Unit 1, Building 2, Qian'an Garden, No. 18 Cuicheng Road, Cuiheng New District, Nanlang Street, Zhongshan City, Guangdong Province, 528400 Patentee after: Zhongshan Aolei Technology Co.,Ltd. Country or region after: China Address before: 518000 A2 fifth floor, Fuhai information port, Qiaotou community, Fuhai street, Shenzhen, Guangdong, Baoan District Patentee before: Shenzhen Olight E-Commerce Technology Co.,Ltd. Country or region before: China |
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