Human body induction atmosphere lamp

Abstract

A human body induction atmosphere lamp comprises an infrared human body induction circuit, a USB interface, a rechargeable battery, a charging management circuit, a power supply selection circuit, a switching circuit, a voltage stabilizing circuit, a booster circuit, an atmosphere lamp and a single-chip microcomputer. The output end of the infrared human body induction circuit is connected with the input end of the single-chip microcomputer. The input end of the charging management circuit is connected with the USB interface, and the output end is connected with the rechargeable battery; the first and second input ends of the power supply selection circuit are respectively connected with the USB interface and the rechargeable battery, and the output end of the power supply selection circuit is respectively connected with the first conduction end of the switching circuit and the input end of the voltage stabilizing circuit; the output end of the voltage stabilizing circuit is connected with the power input end of the infrared human body induction circuit and the power input end of the single-chip microcomputer. The input end of the booster circuit is connected with the second conduction end of the switching circuit, and the output end is connected with the power input end of the atmosphere lamp; the output end of the single-chip microcomputer is connected with the controlled end of the switching circuit and the data input end of the atmosphere lamp. The system is good in energy-saving effect and flexible in power utilization mode.

Description

Technical Field

[0001] The utility model relates to lighting technology, in particular to atmosphere lamp technology. Background Art

[0002] Atmosphere lamps have been widely used in the lighting field. Conventional atmosphere lamps are controlled by switches, unable to sense the presence or absence of people and the ambient light brightness. As long as the switch is turned on, the lamp will light up even when there is no one, resulting in waste of energy. In addition, most of the existing atmosphere lamps rely solely on battery power supply, with a single power supply method, causing inconvenience to users. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a human body induction atmosphere lamp with good energy-saving effect and flexible power usage mode.

[0004] The utility model provides a human body induction atmosphere lamp, which includes an infrared human body induction circuit, a USB interface, a rechargeable battery, a charging management circuit, a power supply selection circuit, a switch circuit, a voltage stabilization circuit, a boost circuit, an atmosphere lamp and a single-chip microcomputer; the output end of the infrared human body induction circuit is connected to the input end of the single-chip microcomputer; the input end of the charging management circuit is connected to the USB interface, and the output end of the charging management circuit is connected to the positive pole of the rechargeable battery; the first input end and the second input end of the power supply selection circuit are respectively connected to the USB interface and the positive pole of the rechargeable battery, and the output end of the power supply selection circuit is respectively connected to the first conduction end of the switch circuit and the input end of the voltage stabilization circuit. The power supply selection circuit is used to connect the output end of the power supply selection circuit to the second input end when the USB interface is not connected to the power supply, and connect the output end of the power supply selection circuit to the first input end when the USB interface is connected to the power supply; the output end of the voltage stabilization circuit is respectively connected to the power supply input end of the infrared human body induction circuit and the power supply input end of the single-chip microcomputer; the input end of the boost circuit is connected to the second conduction end of the switch circuit, and the output end of the boost circuit is connected to the power supply input end of the atmosphere lamp; the output end of the single-chip microcomputer is respectively connected to the controlled end of the switch circuit and the data input end of the atmosphere lamp.

[0005] The utility model has at least the following advantages:

[0006] 1. The embodiment of the utility model is provided with an infrared human body induction circuit, which can automatically turn on or off the atmosphere lamp by sensing human activities. If there is no one, the lamp will not light up, avoiding waste of energy and improving the energy-saving effect;

[0007] 2. The embodiment of the utility model has a USB interface power supply method and a rechargeable battery power supply method. While using the USB interface to supply power, it can also charge the rechargeable battery, thus avoiding the problem of being unable to use when the battery is out of power or charging, and facilitating the use of users. Description of the Drawings

[0008] Figure 1 The circuit schematic diagram of the human body induction atmosphere lamp according to the embodiment of the present utility model is shown. Specific embodiments

[0009] The following further describes the present utility model with reference to the accompanying drawings.

[0010] Figure 1 The circuit principle schematic diagram of the human body induction atmosphere lamp according to the embodiment of the present utility model is shown. Please refer to Figure 1 , the human body induction atmosphere lamp according to the embodiment of the present utility model includes an infrared human body induction circuit 1, a USB interface 21, a rechargeable battery 22, a charging management circuit 23, a power supply selection circuit 3, a switch circuit 4, a voltage stabilizing circuit 51, a boosting circuit 52, an atmosphere lamp 6 and a single-chip microcomputer 7.

[0011] The output end of the infrared human body induction circuit 1 is connected to the input end of the single-chip microcomputer 7. In this embodiment, the infrared human body induction circuit 1 includes a pyroelectric infrared sensor PIR1, a resistor R9, a resistor R10, a capacitor C6 and a capacitor C7, and the model of the pyroelectric infrared sensor PIR1 is P924M-S. The digital signal output pin REL of the pyroelectric infrared sensor PIR1 is connected to the P3.2 pin of the single-chip microcomputer 7. When a human body is sensed, the pyroelectric infrared sensor outputs a high level to the P3.2 pin of the single-chip microcomputer.

[0012] The input end of the charging management circuit 23 is connected to the USB interface 21, and the output end of the charging management circuit 23 is connected to the positive electrode of the rechargeable battery 22. In this embodiment, the charging management circuit 23 includes a charging management chip IC2 with the model of TP4056, a resistor R3, a resistor R6, a resistor R7, a capacitor C2, a capacitor C4, a light-emitting diode D3 and a light-emitting diode D4. The VCC pin of the charging management chip IC2 is connected to the common connection point of the first end of the resistor R3, the first end of the capacitor C2 and the CE pin of the charging management chip IC2; the CHRG pin of the charging management chip IC2 is connected to the first end of the resistor R6, and the second end of the resistor R6 is connected to the cathode of the light-emitting diode D3; the STDBY pin of the charging management chip is connected to the first end of the resistor R7, and the second end of the resistor R7 is connected to the cathode of the light-emitting diode D4; the common connection point of the second end of the resistor R3, the anode of the light-emitting diode D3 and the anode of the light-emitting diode D4 is connected to the USB interface 21, the BAT pin of the charging management chip IC2 is respectively connected to the positive electrode of the rechargeable battery 22 and the first end of the capacitor C4, and the second ends of the capacitor C4 and the capacitor C2 are both grounded.

[0013] When the USB interface 21 is connected to a power source, the charging management chip IC2 charges the rechargeable battery 22. When the charging current drops to 1 / 10 of the set value after reaching the final floating charge voltage, the charging management chip IC2 terminates the charging. In this embodiment, the USB interface 21 is a Type-C interface, and the rechargeable battery 22 is a lithium battery.

[0014] The first input terminal and the second input terminal of the power selection circuit 3 are respectively connected to the positive electrodes of the USB interface 21 and the rechargeable battery 22. The output terminal of the power selection circuit 3 is respectively connected to the first conducting terminal of the switch circuit 4 and the input terminal of the voltage stabilizing circuit 51. The power selection circuit 3 is configured to connect the output terminal of the power selection circuit 3 to the second input terminal (i.e., select the rechargeable battery to supply power) when the USB interface 21 is not connected to a power source, and connect the output terminal of the power selection circuit 3 to the first input terminal (i.e., select the USB interface to supply power) when the USB interface 21 is connected to a power source.

[0015] In this embodiment, the power selection circuit 3 includes a diode D2, a switching transistor Q2, and a resistor R8. The common connection point of the anode of the diode D2, the first end of the resistor R8, and the controlled terminal of the switching transistor Q2 constitutes the first input terminal of the power selection circuit 3. The second conducting terminal of the switching transistor Q2 constitutes the second input terminal of the power selection circuit 3. The common connection point of the cathode of the diode D2 and the first conducting terminal of the switching transistor Q2 constitutes the output terminal of the power selection circuit 3. The second end of the resistor R8 is grounded. The switching transistor Q2 is configured to conduct when the USB interface 21 is not connected to a power source and cut off when the USB interface 21 is connected to a power source. Optionally, the switching transistor Q2 is a PMOS transistor, and the controlled terminal, the first conducting terminal, and the second conducting terminal of the switching transistor Q2 are respectively the gate, the source, and the drain of the PMOS transistor. When a USB power source is connected, the gate of the switching transistor Q2 is at a high level, and the switching transistor Q2 is cut off. The current supplies power to other components after passing through the diode D2. When the USB power source is not connected, the gate of the switching transistor Q2 is at a low level, and the switching transistor Q2 conducts. The rechargeable battery 22 supplies power to other electronic components.

[0016] The output terminal of the voltage stabilizing circuit 51 is respectively connected to the power input terminals of the infrared human body sensing circuit 1 and the single-chip microcomputer 7 to supply power to the infrared human body sensing circuit 1 and the single-chip microcomputer 7. In this embodiment, the voltage stabilizing circuit 51 uses a low dropout linear regulator. The model of the low dropout linear regulator is HT7333. After the low dropout linear regulator stabilizes the voltage of the rechargeable battery or the USB interface to 3.3V, it supplies power to the infrared human body sensing circuit 1 and the single-chip microcomputer 7.

[0017] The input end of the boost circuit 52 is connected to the second conducting end of the switch circuit 4, and the output end of the boost circuit 52 is connected to the power input end of the atmosphere lamp 6. In this embodiment, the boost circuit 52 uses a boost chip IC1 with the model number MT3608 produced by Aerospace Minxin Technology Co., Ltd. The atmosphere lamp 6 is powered by 5V. The highest voltage of the lithium battery is 4.2V, and the output voltage of the USB interface 21 is 5V. After the 5V voltage passes through the power selection circuit 3, the voltage drop of the diode D2 needs to be subtracted. The boost circuit 52 boosts the voltage at the second conducting end of the switch circuit 4 to 5V and then supplies power to the atmosphere lamp 6.

[0018] The output ends of the single-chip microcomputer 7 are respectively connected to the controlled end of the switch circuit 4 and the data input end of the atmosphere lamp 6. In this embodiment, the switch circuit 4 includes a PMOS transistor Q1. The controlled end, the first conducting end, and the second conducting end of the switch circuit 4 are respectively the gate, the source, and the drain of the PMOS transistor Q1. The single-chip microcomputer 7 is connected to the gate of the PMOS transistor Q1 through the P1.7 pin, and controls the power supply of the boost circuit 52 to the atmosphere lamp 6 by controlling the conduction and cut-off of the PMOS transistor Q1.

[0019] The atmosphere lamp 6 includes multiple RGB-LED light source chips with the model number WS2812B ( Figure 1 In the example, the number of RGB-LED light source chips is four, namely RGB-LED light source chips D5 to D8). Multiple RGB-LED light source chips are connected in series. The DO pin of the previous RGB-LED light source chip is connected to the DIN pin of the next RGB-LED light source chip. The DIN pin of the first RGB-LED light source chip (i.e., the data input end of the aforementioned atmosphere lamp 6) is connected to the output end of the single-chip microcomputer 7. The output signal of the single-chip microcomputer is input to the DIN pin of the first RGB-LED light source chip, and the subsequent signal is output from the DOUT pin of each RGB-LED light source chip to the next-level RGB-LED light source chip.

[0020] In this embodiment, the single-chip microcomputer 7 uses a single-chip microcomputer with the model number STC8G1K08. When the single-chip microcomputer 7 receives the high-level signal output by the pyroelectric infrared sensor, it controls the PMOS transistor Q1 to conduct, enables the boost circuit 52 to work, and outputs the pre-stored signal data to the atmosphere lamp 6 to turn on the atmosphere lamp 6. When there is no one, the PMOS transistor Q1 is cut off, and the human body induction atmosphere lamp of the embodiment of the present utility model does not light up, thereby avoiding waste of energy and achieving the effect of energy saving.

[0021] In order to achieve better energy-saving effects, further, the human body induction atmosphere lamp of the present utility model is further provided with a photosensitive circuit 8. The output end of the photosensitive circuit 8 is connected to the input end of the single-chip microcomputer 7, and the output end of the voltage stabilizing circuit 51 is connected to the power input end of the photosensitive circuit 8 to supply power to the photosensitive circuit 8. The photosensitive circuit 8 is used to detect the intensity of ambient light and send a detection signal to the single-chip microcomputer 7.

[0022] In some specific embodiments, the photosensitive circuit includes a photosensitive triode Q3, a resistor R11, and a capacitor C8. The common connection point of the collector of the photosensitive triode Q3, the first end of the resistor R11, and the first end of the capacitor C8 is connected to the input end of the single-chip microcomputer 7. The second end of the resistor R11 is connected to the output end of the voltage stabilizing circuit 51, and the emitter of the photosensitive triode Q3 and the second end of the capacitor C8 are grounded. When the ambient light becomes brighter, the voltage of the P1.1 pin of the single-chip microcomputer 7 drops. When the ambient light becomes darker, the voltage of the P1.1 pin of the single-chip microcomputer 7 rises. In some specific embodiments, the single-chip microcomputer 7 controls the atmosphere lamp 6 to light up only when a high level is received at the P3.2 pin and the voltage of the P1.1 pin is greater than a preset voltage threshold, that is, the human body induction atmosphere lamp does not work during the day and only works when a human body is sensed to be approaching at night, thereby achieving better energy-saving effects.

[0023] Further, the human body induction atmosphere lamp of the present utility model is provided with a key. The output end of the key is connected to the input end of the single-chip microcomputer 7. In the example in the figure, three keys S1, S2, and S3 are provided. By pressing different keys, functions such as brightness switching, light color switching, and lighting time switching can be achieved.

[0024] The embodiment of the present utility model has a USB interface power supply mode and a rechargeable battery power supply mode. While using the USB interface to supply power, it can also charge the rechargeable battery, thereby avoiding the problem of being unable to use when the battery runs out of power or is charging, and facilitating the use of users.

[0025] The above are only the preferred embodiments of the utility model and are not used to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the utility model shall be included within the protection scope of the utility model.

Claims

1. Human body sensing atmosphere lamp, characterized in that, It includes an infrared human body induction circuit, a USB interface, a rechargeable battery, a charging management circuit, a power supply selection circuit, a switching circuit, a voltage stabilizing circuit, a boost circuit, an atmosphere lamp and a single-chip microcomputer; The output end of the infrared human body induction circuit is connected to the input end of the single-chip microcomputer; The input end of the charging management circuit is connected to the USB interface, and the output end of the charging management circuit is connected to the positive pole of the rechargeable battery; The first input end and the second input end of the power supply selection circuit are respectively connected to the USB interface and the positive pole of the rechargeable battery. The output end of the power supply selection circuit is respectively connected to the first conduction end of the switching circuit and the input end of the voltage stabilizing circuit. The power supply selection circuit is used to connect the output end of the power supply selection circuit to the second input end when the USB interface is not connected to the power supply, and connect the output end of the power supply selection circuit to the first input end when the USB interface is connected to the power supply; The output end of the voltage stabilizing circuit is respectively connected to the power supply input end of the infrared human body induction circuit and the power supply input end of the single-chip microcomputer; The input end of the boost circuit is connected to the second conduction end of the switching circuit, and the output end of the boost circuit is connected to the power supply input end of the atmosphere lamp; The output end of the single-chip microcomputer is respectively connected to the controlled end of the switching circuit and the data input end of the atmosphere lamp.

2. The human body induction atmosphere lamp according to claim 1, characterized in that, The power supply selection circuit includes a diode D2, a switching tube Q2 and a resistor R8; The common connection point of the anode of the diode D2, the first end of the resistor R8 and the controlled end of the switching tube Q2 forms the first input end of the power supply selection circuit. The second conduction end of the switching tube Q2 forms the second input end of the power supply selection circuit. The common connection point of the cathode of the diode D2 and the first conduction end of the switching tube Q2 forms the output end of the power supply selection circuit. The second end of the resistor R8 is grounded; The switching tube Q2 is used to conduct when the USB interface is not connected to the power supply and cut off when the USB interface is connected to the power supply.

3. The human body induction atmosphere lamp according to claim 2, wherein The switching tube Q2 is a PMOS tube. The controlled end, the first conduction end and the second conduction end of the switching tube Q2 are respectively the gate, the source and the drain of the PMOS tube.

4. The human body induction atmosphere lamp according to claim 1, characterized in that, The switching circuit includes a PMOS tube Q1. The controlled end, the first conduction end and the second conduction end of the switching circuit are respectively the gate, the source and the drain of the PMOS tube Q1.

5. The human body induction atmosphere lamp according to claim 1, characterized in that The voltage stabilizing circuit uses a low-dropout linear voltage regulator.

6. The human body induction atmosphere lamp according to claim 1, characterized in that, The charging management circuit includes a charging management chip of model TP4056, a resistor R3, a resistor R6, a resistor R7, a capacitor C2, a capacitor C4, a light-emitting diode D3 and a light-emitting diode D4; The VCC pin of the charging management chip is connected to the common connection point of the first end of resistor R3, the first end of capacitor C2, and the CE pin of the charging management chip; the CHRG pin of the charging management chip is connected to the first end of resistor R6, and the second end of resistor R6 is connected to the cathode of light-emitting diode D3; the STDBY pin of the charging management chip is connected to the first end of resistor R7, and the second end of resistor R7 is connected to the cathode of light-emitting diode D4; the common connection point of the second end of resistor R3, the anode of light-emitting diode D3, and the anode of light-emitting diode D4 is connected to the USB interface, the BAT pin of the charging management chip is respectively connected to the positive electrode of the charging battery and the first end of capacitor C4, and the second ends of capacitor C4 and capacitor C2 are both grounded.

7. The human body induction atmosphere lamp according to claim 1, characterized in that, The atmosphere lamp includes multiple RGB-LED light source chips of model WS2812B. The multiple RGB-LED light source chips are connected in series. The DO pin of the previous RGB-LED light source chip is connected to the DIN pin of the next RGB-LED light source chip, and the DIN pin of the first RGB-LED light source chip is connected to the output end of the single-chip microcomputer.

8. The human body induction atmosphere lamp according to claim 1, characterized in that, The human body sensing atmosphere lamp includes a photosensitive circuit. The output end of the photosensitive circuit is connected to the input end of the single-chip microcomputer, and the output end of the voltage stabilizing circuit is connected to the power input end of the photosensitive circuit; the photosensitive circuit is used to detect the intensity of ambient light and send a detection signal to the single-chip microcomputer.

9. The human body induction atmosphere lamp according to claim 1, characterized in that, The human body sensing atmosphere lamp includes a button. The output end of the button is connected to the input end of the single-chip microcomputer.

10. The human body induction atmosphere lamp according to claim 1, characterized in that, The USB interface is a Type-C interface, and the charging battery is a lithium battery.

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