CN210052474U

CN210052474U - Advertising board

Info

Publication number: CN210052474U
Application number: CN201920788144.6U
Authority: CN
Inventors: 蒋昊文; 欧阳志光
Original assignee: Dongguan Xinjiang Digital Media Co Ltd
Current assignee: Dongguan Xinjiang Digital Media Co Ltd
Priority date: 2019-05-28
Filing date: 2019-05-28
Publication date: 2020-02-11
Anticipated expiration: 2029-05-28

Abstract

The utility model relates to a billboard, including the tablet face that is used for pasting the advertising information, tablet face top is equipped with the LED lamp D2 who is used for illuminating the tablet face, still includes working circuit, working circuit contains pyroelectric infrared sensor P1, first amplifier, comparator, 555 timer U1, second amplifier and opto-coupler U2, pyroelectric infrared sensor P1's signal output part is connected to the negative-going input of comparator through first amplifier, and reference voltage is connected to the positive-going input of comparator, and the output of comparator is connected to 555 timer U1's trigger end, and 555 timer U1's signal output part is connected to the positive pole of the luminotron of opto-coupler U2 through the second amplifier, the negative pole ground connection of luminotron, working circuit's power is connected to ground behind the photic ware of LED lamp D2, opto-coupler U2 of establishing ties. The utility model discloses a bill-board has the man-hour automatic lamp-on at night, and unmanned automatic lamp-off at night has energy-conserving effect.

Description

Advertising board

Technical Field

The utility model relates to a billboard.

Background

The LED lamp of the existing billboard does not have an induction function, and advertisement information on the billboard is displayed to passers by adopting a mode of always lighting at night, so that the mode has higher power consumption and no energy-saving effect.

SUMMERY OF THE UTILITY MODEL

The utility model provides an energy-saving billboard for improving the defects in the prior art.

Therefore, the advertising board comprises a board surface used for attaching advertising information, an LED lamp D2 used for illuminating the board surface is arranged at the top of the board surface, and the advertising board further comprises a working circuit, wherein the working circuit comprises a pyroelectric infrared sensor P1, a first amplifier, a comparator, a 555 timer U1, a second amplifier and an optical coupler U2, the signal output end of the pyroelectric infrared sensor P1 is connected to the negative input end of the comparator through the first amplifier, the positive input end of the comparator is connected with reference voltage, the output end of the comparator is connected to the trigger end of the 555 timer U1, the signal output end of the 555 timer U1 is connected to the anode of a light emitting tube of the optical coupler U2 through the second amplifier, the cathode of the light emitting tube is grounded, and the power supply of the working circuit is connected to the ground after being connected with the LED lamp D2 and the light receiver of the optical coupler U2 in series.

Furthermore, the first amplifier is provided with an operational amplifier Q1C, a resistor R1, a resistor R2 and a resistor R3, the signal output end of the pyroelectric infrared sensor P1 is connected to the positive input end of the operational amplifier Q1C through a resistor R2, the negative input end of the amplifier Q1C is grounded through a resistor R1, one end of the resistor R3 is connected to the negative input end of the operational amplifier Q1C, and the other end of the resistor R3 is connected to the output end of the operational amplifier Q1C.

Further, a capacitor C1 is included, and the output terminal of the operational amplifier Q1C is grounded through a capacitor C1.

Further, the reference voltage comparator further comprises a sliding resistor RF1, two ends of the sliding resistor RF1 are respectively connected with a power supply and a ground of the working circuit, and a slide of the sliding resistor RF1 is connected with a positive input end of the comparator so as to provide the reference voltage for the comparator.

Further, the comparator comprises an operational amplifier Q2C, a resistor R4 and a resistor R5, wherein the output end of the operational amplifier Q2C is connected to the trigger end of the 555 timer U1 through a resistor R5, and the positive input end of the operational amplifier Q2C is connected to the output end of the operational amplifier Q2C through a resistor R4 and a resistor R5.

Further, a button KW1 is further included, and the reset end of the 555 timer U1 is connected to the ground through the button KW 1.

Furthermore, the second amplifier is provided with an operational amplifier Q3C, a resistor R8, a resistor R9 and a resistor R10, the signal output end of the 555 timer U1 is connected to the positive input end of the operational amplifier Q2C through a resistor R9, the negative input end of the amplifier Q3C is grounded through a resistor R8, one end of the resistor R10 is connected to the negative input end of the operational amplifier Q3C, and the other end of the resistor R10 is connected to the output end of the operational amplifier Q3C.

Further, the LED lamp further comprises a resistor R11, and the resistor R11 is connected in series on a connection path between the LED lamp D2 and the light receiver of the optical coupler U2.

Further, the 555 timer U1 is composed of NE555 chips.

When a night working circuit works, a pyroelectric infrared sensor P1 detects infrared ray change around a billboard by utilizing a pyroelectric effect, when a person approaches the billboard, the pyroelectric infrared sensor P1 senses charges to generate electromotive force, the electromotive force is amplified by a first amplifier 1 and then is compared with reference voltage at the positive input end of a comparator 2, when the potential exceeds the reference voltage, high level is output to a 555 timer U1 to trigger the 555 timer U1 to output pulses with a specific duty ratio, the pulses are amplified by a second amplifier 3 and then are output to an optical coupler U2, the conduction of the optical coupler U2 and the optical receiver are controlled, and an LED lamp D2 is powered to shine; after the person leaves the billboard, the electromotive force output by the pyroelectric infrared sensor P1 falls back to the lower of the reference voltage, so that the 555 timer U1 is turned off, and the LED lamp D2 is powered off, thereby realizing the automatic lighting of the billboard when someone is at night and the automatic lighting of the billboard when nobody is at night, and achieving the purpose of energy saving.

Drawings

The present invention is further explained by using the drawings, but the embodiments in the drawings do not constitute any limitation to the present invention, and for those skilled in the art, other drawings can be obtained according to the following drawings without any inventive work.

Fig. 1 is a circuit diagram of the working circuit on the billboard of the utility model.

Detailed Description

The invention is further described with reference to the following examples.

The utility model discloses a bill-board includes the conventional tablet face that is used for pasting and establishes advertising information, and tablet face top is equipped with the LED lamp D2 that is used for illuminating the tablet face.

Referring to fig. 1, the billboard is provided with a working circuit, and the working circuit comprises a pyroelectric infrared sensor P1, a first amplifier 1, a comparator 2, a 555 timer U1, a second amplifier 3 and an optical coupler U2.

The first amplifier 1 comprises an operational amplifier Q1C, a resistor R1, a resistor R2 and a resistor R3, wherein a signal output end of the pyroelectric infrared sensor P1 is connected to a positive input end of the operational amplifier Q1C through a resistor R2, a negative input end of the amplifier Q1C is grounded through the resistor R1, one end of a resistor R3 is connected with a negative input end of the operational amplifier Q1C, the other end of the resistor R3 is connected with an output end of the operational amplifier Q1C, the amplification factor of the first amplifier 1 is adjusted by setting a ratio between the R3 and the R1, and the output signal of the pyroelectric infrared sensor P1 is amplified in the positive direction. Furthermore, a capacitor C1 is connected to the ground at the output end of the operational amplifier Q1C, and noise in the pyroelectric infrared sensor P1 is filtered by selecting a proper capacitance value.

The output end of the first amplifier 1 is connected to the negative input end of the operational amplifier Q2C, the positive input end of the operational amplifier Q2C is connected to the slide of the slide resistor RF1, and two ends of the slide resistor RF1 are respectively connected to the power supply and the ground of the working circuit, so as to provide the reference voltage for the positive input end of the operational amplifier Q2C. The reference voltage may be manually adjusted by a sliding resistor RF 1. The periphery of the operational amplifier Q2C is provided with a resistor R4 and a resistor R5, the output end of the operational amplifier Q2C is connected to the trigger end of a 555 timer U1 through a resistor R5, and the positive input end of the operational amplifier Q2C is connected to the output end of the operational amplifier Q2C through a resistor R4 and a resistor R5. The hysteresis comparator 2 is formed by matching the operational amplifier Q2C, the resistor R4 and the resistor R5, the hysteresis comparator 2 outputs a high level to the 555 timer U1 for triggering when a signal amplified by the pyroelectric infrared sensor P1 is greater than a reference voltage and the reference voltage.

The 555 timer U1 is composed of an NE555 chip, and the periphery thereof is set according to a standard circuit of the NE555 chip, which is not described herein.

Referring to fig. 1, a signal output end of the 555 timer U1 is connected to a positive input end of an operational amplifier Q2C through a resistor R9, a negative input end of an amplifier Q3C is grounded through a resistor R8, one end of the resistor R10 is connected to a negative input end of an operational amplifier Q3C, and the other end of the resistor R10 is connected to an output end of an operational amplifier Q3C, wherein the operational amplifier Q3C, the resistor R8, the resistor R9, and the resistor R10 form a second amplifier 3 for performing positive amplification on an output signal of the 555 timer U1. The signal after positive amplification is output to the anode of the luminous tube of the optocoupler U2, the cathode of the luminous tube is grounded, and the luminous tube is driven to emit light through the signal. The power supply of the working circuit is connected with the LED lamp D2 and the light receiver of the optocoupler U2 in series and then connected to the ground, and when the light-emitting tube emits light, the light receiver is conducted to enable the LED lamp D2 to be powered and illuminated. Further, a resistor R11 is connected in series to a connection path between the LED lamp D2 and the light receiver of the optocoupler U2 to prevent the branch where the LED lamp D2 is located from idling when the light receiver is turned on.

The working circuit is powered on at night to work, and in the working process of the working circuit, the pyroelectric infrared sensor P1 detects infrared changes around the billboard by utilizing the pyroelectric effect, when a person approaches the billboard, the pyroelectric infrared sensor P1 senses charges to generate electromotive force, the electromotive force is amplified by the first amplifier 1 and then is compared with reference voltage at the positive input end of the comparator 2, when the potential exceeds the reference voltage, high level is output to the 555 timer U1 to trigger the 555 timer U1 to output pulses with specific duty ratios, the pulses are amplified by the second amplifier 3 and then are output to the optocoupler U2 to control the conduction of the optocoupler U2 light receiver, and further the LED lamp D2 is powered on and shines. After a person leaves the billboard, the electromotive force output by the pyroelectric infrared sensor P1 falls back to a reference voltage, so that the 555 timer U1 is turned off, the LED lamp D2 is powered off, the billboard is automatically turned on when the person is at night, and is automatically turned off when no person is at night, and the purpose of energy conservation is achieved.

Further, a button KW1 is arranged at a reset end of the 555 timer U1, one end of the button KW1 is connected with the reset end, the other end of the button KW is connected with the ground, and a user can turn off the lamp manually through the button.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the protection scope of the present application, and although the present application is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present application without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. The utility model provides a billboard, is including being used for pasting the tablet face of establishing advertising information, and tablet face top is equipped with LED lamp D2 that is used for lightening the tablet face, characterized by: still include the working circuit, the working circuit contains pyroelectric infrared sensor P1, first amplifier, comparator, 555 timer U1, second amplifier and opto-coupler U2, pyroelectric infrared sensor P1's signal output part is connected to the negative-going input of comparator through first amplifier, and reference voltage is connected to the positive-going input of comparator, and the output of comparator is connected to 555 timer U1's trigger end, and 555 timer U1's signal output part is connected to the positive pole of opto-coupler U2's luminotron through the second amplifier, the negative pole ground connection of luminotron, be connected to ground behind the photic ware of working circuit's the power series connection LED lamp D2, opto-coupler U2.

2. A billboard according to claim 1, in which: the first amplifier is provided with an operational amplifier Q1C, a resistor R1, a resistor R2 and a resistor R3, the signal output end of the pyroelectric infrared sensor P1 is connected to the positive input end of the operational amplifier Q1C through a resistor R2, the negative input end of the amplifier Q1C is grounded through a resistor R1, one end of the resistor R3 is connected with the negative input end of the operational amplifier Q1C, and the other end of the resistor R3 is connected with the output end of the operational amplifier Q1C.

3. A billboard according to claim 2, in which: the circuit also comprises a capacitor C1, and the output end of the operational amplifier Q1C is grounded through a capacitor C1.

4. A billboard according to claim 1 or 2, in which: the reference voltage circuit further comprises a sliding resistor RF1, two ends of the sliding resistor RF1 are respectively connected with a power supply and a ground of the working circuit, and a slide of the sliding resistor RF1 is connected with a positive input end of the comparator so as to provide the reference voltage for the comparator.

5. A billboard according to claim 4, in which: the comparator comprises an operational amplifier Q2C, a resistor R4 and a resistor R5, wherein the output end of the operational amplifier Q2C is connected to the trigger end of the 555 timer U1 through a resistor R5, and the positive input end of the operational amplifier Q2C is connected to the output end of the operational amplifier Q2C through a resistor R4 and a resistor R5.

6. A billboard according to claim 1, in which: also included is a button KW1, the reset terminal of the 555 timer U1 is connected to ground through button KW 1.

7. A billboard according to claim 1 or 2, in which: the second amplifier is provided with an operational amplifier Q3C, a resistor R8, a resistor R9 and a resistor R10, the signal output end of the 555 timer U1 is connected to the positive input end of the operational amplifier Q2C through a resistor R9, the negative input end of the amplifier Q3C is grounded through a resistor R8, one end of the resistor R10 is connected with the negative input end of the operational amplifier Q3C, and the other end of the resistor R10 is connected with the output end of the operational amplifier Q3C.

8. A billboard according to claim 1, in which: the LED lamp also comprises a resistor R11, wherein the resistor R11 is connected in series on a connecting path between the LED lamp D2 and a light receiver of the optical coupler U2.

9. A billboard according to claim 1, in which: the 555 timer U1 is composed of NE555 chips.