CN113314058A - Museum entrance is with propaganda display device - Google Patents
Museum entrance is with propaganda display device Download PDFInfo
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- CN113314058A CN113314058A CN202110632304.XA CN202110632304A CN113314058A CN 113314058 A CN113314058 A CN 113314058A CN 202110632304 A CN202110632304 A CN 202110632304A CN 113314058 A CN113314058 A CN 113314058A
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- 229910052751 metal Inorganic materials 0.000 claims abstract description 55
- 239000002184 metal Substances 0.000 claims abstract description 55
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 230000000694 effects Effects 0.000 claims abstract description 14
- 230000008054 signal transmission Effects 0.000 claims description 6
- 230000033228 biological regulation Effects 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 230000017525 heat dissipation Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F27/00—Combined visual and audible advertising or displaying, e.g. for public address
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Acoustics & Sound (AREA)
- Computer Networks & Wireless Communication (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Abstract
The invention belongs to the technical field of propaganda and display, and particularly relates to a propaganda and display device for an entrance of a museum, which comprises a metal shell, wherein a cavity is arranged in the metal shell, a back plate capable of being opened and closed is arranged at the front end of the metal shell, a display screen can be embedded on the back plate, an integrated circuit and a loudspeaker are further arranged in the built-in cavity of the metal shell, a noise collector electrically connected with the integrated circuit is arranged in the built-in cavity of the metal shell, a signal emission mechanism is movably clamped on the inner wall of the built-in cavity of the metal shell, and the top end of the signal emission mechanism penetrates through the metal shell. Has the advantages that: the invention can regulate and control the propaganda audio frequency of public buildings such as museums in real time, thereby achieving the effect of intelligently regulating the volume aiming at the flow of people and improving the effect to the maximum extent.
Description
Technical Field
The invention belongs to the technical field of propaganda and display, and particularly relates to a propaganda and display device for an entrance of a museum.
Background
Museums are places for collecting, showing and researching physical objects representing natural and human cultural heritages, are organizations, buildings, places or social public organizations for classified management of collected objects and providing knowledge, education and appreciation for the public, are non-profit permanent organizations, are open to the public, provide services for social development and aim at learning, education and entertainment.
The entrance of museum needs a lot of propaganda show devices, traditional uses manpower, and now most adopt the device to replace, carries out effects such as propaganda, guide, and traditional propaganda equipment audio frequency is usually fixed, can't play a role when the people are many, and the flow of people is little again becomes one of the source of noise.
To this end, we propose a propaganda showing device at the entrance of a museum to solve the above problems.
Disclosure of Invention
The invention aims to solve the problems and provides a propaganda and display device for a museum entrance, which can adjust the volume adaptive crowd.
In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a museum entrance is with propaganda display device, includes metal casing, metal casing embeds there is the cavity, and its front end is equipped with the backplate that can open and shut, can the gomphosis have a display screen on the backplate, still install integrated circuit and speaker in metal casing's the built-in cavity, be equipped with the noise collector of being connected with the integrated circuit electricity in metal casing's the built-in cavity, still activity block has signal emission mechanism on the inner wall of metal casing built-in cavity, signal emission mechanism's top is run through metal casing and is extended and go out.
In foretell museum entrance is with propaganda display device, noise collector and speaker set up respectively in metal casing's distal end both sides, and noise collector and speaker pass through signal emission mechanism and external equipment constitution intelligent regulation module.
In the propaganda and display device for the entrance of the museum, a plurality of first sound holes are formed in the surface of the back plate, which is close to the loudspeaker.
In foretell museum entrance is with propaganda display device, signal emission mechanism is including dividing the spout of locating on two offside inner walls of metal casing, equal sliding connection has the slider in the spout, and is a plurality of a connecting rod of fixedly connected with between the slider, connecting rod span noise collector and speaker, many signal emission poles have side by side on the connecting rod, signal emission pole and internal integrated circuit electric connection, and the metal casing is run through at the top.
In foretell museum entrance is with propaganda display device, fixedly connected with driving motor is still gone back to metal casing's outside, driving motor's drive shaft runs through to in the metal casing, its upper portion movable mounting has a cam disc, the cam disc contacts with the connecting rod, signal transmission pole still overlaps and is equipped with the spring that is used for cooperating the cam disc.
In foretell museum entrance is with propaganda display device, the side of spout is equipped with the breach, and the position of breach is less than cam disc flat placement point, the slider is cylindricly for better through the breach roll-off.
In foretell museum entrance is with propaganda display device, it is a plurality of be equipped with same fan assembly on the signal transmission pole, fan assembly embeds has a plurality of fan passageways, and with integrated circuit electric connection, the thermovent that is used for cooperating fan assembly is seted up to metal casing's bottom.
In the above propaganda and display device for entrance of museum, the intelligent adjusting module comprises the following steps:
s1, normal initial segment playing: fixedly electrifying at the placing position, then lifting the signal transmitting rod, starting the loudspeaker to play the preset volume decibel, and synchronously displaying the volume decibel on the display screen;
s2, noise control and regulation: after the step S1 is finished, noise collection is carried out for 3-5min, the noise collector carries out noise collection and converts the noise into an electric signal, the electric signal is transmitted out through signal transmission, and external computing equipment carries out dynamic intelligent adjustment, so that the volume of the loudspeaker is synchronously increased when the noise is high, and the volume of the loudspeaker is reduced when people are few and the noise is low;
s3, low noise and energy saving: when the crowd decibel is lower than a set certain decibel for a long time, only the noise collector is reserved for power-on operation, and the loudspeaker and the display screen are closed for energy-saving operation.
In the propaganda and display device for entrance of museum, according to the steps in the above-mentioned S1-S3, the device is collected to the external intelligent computing device through the multiple devices, the number of people in each place of the area, that is, the flow direction, is judged through detecting the noise volume and the duration of different positions, and the number of people is collected into a dynamic graph to form the flow trend graph of people.
Compared with the prior art, this museum entrance is with propaganda display device's advantage lies in:
1. the invention can regulate and control the propaganda audio frequency of public buildings such as museums in real time by the matching of the arranged loudspeaker, the noise collector and the signal transmitting mechanism, thereby achieving the effect of intelligently regulating the volume according to the flow of people and improving the effect of the public buildings to the maximum extent.
2. The invention can collect the information of a plurality of devices in an audio data gathering mode, thereby carrying out monitoring calculation, monitoring the trend and the position of the pedestrian volume in real time and effectively helping personnel in the hall to carry out personnel scheduling and other operations.
Drawings
FIG. 1 is a schematic view of an external structure of a propaganda and display device for entrance of a museum according to the present invention;
FIG. 2 is a schematic view of the backside structure of FIG. 1;
FIG. 3 is an internal exploded view of a promotional display for entry to a museum according to the present invention;
FIG. 4 is an exploded view of the cam disk and signal emitting lever of FIG. 3;
FIG. 5 is an enlarged view of a portion of FIG. 3 at A;
fig. 6 is a partially enlarged view at B in fig. 3.
In the figure, 1 a metal shell, 2 a back plate, 3 a display screen, 4 loudspeakers, 5 a noise collector, 6 a signal emission mechanism, 7 a first sound hole, 8 sliding grooves, 9 sliding blocks, 10 connecting rods, 11 a signal emission rod, 12 a driving motor, 13 a cam plate, 14 springs, 15 gaps, 16 fan sets, 17 heat dissipation ports, 18T-shaped plates, 19 upper sections, 20 lower sections, 21 knobs and 22 second sound holes.
Detailed Description
The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.
Examples
As shown in fig. 1-6, a propaganda display device is used at museum entrance, including metal casing 1, metal casing 1 is the square body shape, metal casing 1 mainly uses the aluminum alloy material, but not only can use a material in this embodiment, still can include the enough high material of structural strength such as rigid plastic, metal casing 1 embeds there is the cavity to be used for holding electronic components, in addition still be equipped with external electrical power generating system and be used for the power supply, built-in battery, supply power through the mode of plugging in, metal casing 1's back fixedly connected with T shaped plate 18, be used for the help to carry out the wall fixed, T shaped plate 18 can carry out forms such as joint or riveting and fix, thereby make metal casing 1 can be comparatively convenient carry out the fixed of optional position, especially to the various museums of difficult destruction its wall surface.
The front end of metal casing 1 is equipped with backplate 2 that can open and shut, backplate 2 is metal decking, mode through the block is connected with metal casing 1, the mode of opening mainly prizes through edge gap department, the thickness and the size of backplate 2 can refer to the drawing standard, can the coincide has display screen 3 on backplate 2, display screen 3 fixes on backplate 2, but integrative dismantlement, still install integrated circuit and speaker 4 in metal casing 1's the built-in cavity, display screen 3 and the also electric connection of inside integrated circuit, display screen 3 and speaker 4 are synchronous respectively shows picture and sound, the sound that a plurality of first sound hole 7 are used for in metal casing 1 is spread outward to the position that backplate 2's surface is close to speaker 4 has been seted up.
The built-in cavity of the metal shell 1 is provided with a noise collector 5 electrically connected with the integrated circuit, the noise collector 5 is used for collecting surrounding environment noise, the noise collector 5 and the loudspeaker 4 are controlled and regulated by the same set of equipment, generally, it is known that in the museum environment, various sounds exist and can be changed into uniform background noise when being gathered together, the background noise greatly influences the normal operation effect of the loudspeaker 4, but the collection is not feasible only through the same position of the noise collector 5, the loudspeaker 4 is one of the objects which are easy to be targeted, therefore, the noise collector 5 can actively evade the audio signal sent by the loudspeaker 4 when in operation and ignore the audio signal, thereby preventing the interference between the two, the collection range of the noise collector 5 is 0-50 decibels, the sound-collecting device is divided into three levels, namely 0-5 decibel, 6-50 decibel and more than 50 decibel, the three levels correspond to silence, step-by-step adjustment and maximum audio frequency respectively, the noise collector 5 and the loudspeaker 4 are respectively arranged on two sides of the far end of the metal shell 1 and used for reducing the influence on the noise collector 5 to the maximum extent, the purpose of the level setting is to perform logic judgment and adjustment better, the limitation on the scheme is not represented, and other types of modes can be adopted according to local conditions.
The inner wall of the built-in cavity of the metal shell 1 is movably clamped with a signal transmitting mechanism 6, the top end of the signal transmitting mechanism 6 penetrates through the metal shell 1 and extends out to prevent signals from being shielded, the transmission effect of the signals is improved, the signal transmitting mechanism 6 comprises sliding grooves 8 which are respectively arranged on the inner walls of two opposite sides of the metal shell 1, sliding blocks 9 are respectively connected in the sliding grooves 8 in a sliding mode, the sliding blocks 9 can freely slide in the sliding grooves 8, notches 15 are arranged on the side edges of the sliding grooves 8, the positions of the notches 15 are lower than the flat placing point of a cam disc 13, the main purpose is to enable the sliding blocks 9 to slide out of the notches 15 in a mode of the cam disc 13, the lifting and accidental falling in the daily operation process are prevented, the stability of the equipment in operation is improved, the mode is stable and reliable, a certain locking function is achieved, and the sliding blocks 9 are cylindrical and are convenient to slide and enter and exit in the notches 15, for better sliding out movement through the notch 15.
Connecting rod 10 of fixedly connected with between a plurality of sliders, connecting rod 10 strides across noise collector 5 and speaker 4, all need earlier moving connecting rod 10 when needing to dismantle maintenance or debugging noise collector 5 and speaker 4 or its internal component, and moving connecting rod 10's mode is exactly through slider 9 removal from breach 15 roll-off, thereby connecting rod 10 is fallen in holistic dismantlement, many signal emission pole 11 have on the connecting rod 10 side by side, signal emission pole 11 can be wifi signal transmission's mode, signal emission pole 11 and internal integrated circuit electric connection, and metal casing 1 is run through at the top, because there is the invasion such as rivers that lead to easily in the clearance between signal emission pole 11 and the metal casing 1, consequently still the cover is equipped with the sealing washer and improves the leakproofness between metal casing 1 and signal emission pole 11.
The signal emitting rod 11 is of a two-section structure and is divided into an upper section 19 and a lower section 20, a signal emitting device is assembled inside the upper section 19, the lower section 20 is a solid section and is mainly used for being fixedly connected with the connecting rod 10, so that the effect of convenient and independent replacement is achieved, the upper section 19 is connected with an internal circuit and bears the effect of real-time signal transmission and reception, the same fan group 16 is arranged on the signal emitting rods 11, the fan group 16 is used for internal heat dissipation and can move up and down along with the signal emitting rod 11, so that quick heat dissipation of different parts is achieved, according to the remote of a heat collection effect, in a limited environment, the fixed air flow does not easily achieve the effect of drainage and dredging on certain pickled purposeful parts, so that the fixed air flow is necessary to move, the defect is broken, and the museum propaganda instrument in the scheme is easy to be in a long-term external high-temperature environment, therefore, in the present type of optimization device, a plurality of fan channels are built in the fan set 16, and the number of the fan channels is not limited, and the fan channels can be adapted equally and electrically connected with the integrated circuit.
The bottom of the metal shell 1 is provided with a heat dissipation port 17 for matching with a fan set 16 for air flow exchange, the exterior of the metal shell 1 is also fixedly connected with a driving motor 12, a driving shaft of the driving motor 12 penetrates into the metal shell 1, the upper part of the driving motor is movably provided with a cam disc 13, the cam disc 13 is contacted with a connecting rod 10, a spring 14 for matching with the cam disc 13 is further sleeved on the signal transmitting rod 11, the mounting spring 14 and the cam disc 13 can be regarded as further improvement of the scheme, manual adjustment can be carried out under the condition that the spring 14 is not matched with the cam disc 13, real-time automatic adjustment can be carried out through the spring 14 and the cam disc 13, and the position of the fan set 16 can be coordinated, the shape of the cam disc 13 is shown in the drawing and is butted on the driving shaft of the driving motor 12, a position (not shown in the drawing) is arranged on the driving shaft of the driving motor 12 and is hollow, the hollow part is in threaded connection with a knob 21, and the cam disc 13 is assembled and disassembled by disassembling and assembling the knob 21, so that the signal emitting rod 11 and other parts can be further disassembled;
the noise collector 5 and the loudspeaker 4 form an intelligent adjusting module with external equipment through a signal transmitting mechanism 6, and the intelligent adjusting module comprises the following steps:
s1, normal initial segment playing: fixedly electrifying at a placing position, then lifting a signal emitting rod 11, starting a loudspeaker 4 to play at a preset volume decibel after finishing basic electrifying operation, wherein the set volume is 20 decibels, synchronously displaying a display screen 3 along with the preset volume decibel, starting in a fixed mode at an initial stage, and not carrying out logic judgment according to the grading, thereby finishing the debugging and system stabilizing stages after starting;
s2, noise control and regulation: after the step S1 is finished, noise collection is carried out for 3-5min, operation level judgment logic is prepared at the stage, when noise is collected, an audio frequency wave band emitted by the loudspeaker 4 can be actively eliminated through setting of a computer, the noise collector 5 carries out noise collection and conversion to form an electric signal, the electric signal is emitted through signal emission, the emission frequency is 10 times/min, external computing equipment carries out dynamic intelligent adjustment after computing, therefore, the volume of the loudspeaker 4 is synchronously increased when noise is high, the volume of the loudspeaker 4 is reduced when people have little noise, and the intelligent adjustment effect is achieved;
s3, low noise and energy saving: when the crowd decibel is lower than a set certain decibel for a long time, such as 5 decibels, only the noise collector 5 is kept for electrifying operation, and the loudspeaker 4 and the display screen 3 are closed for energy-saving operation;
according to the steps in the S1-S3, the number of people in each place of the region, namely the flow direction, is judged by detecting the noise volume and the duration of different positions through the arranged multiple devices, and the number of people is collected into an external intelligent computing device, and the flow direction is collected into a dynamic graph to form a flow trend graph of the people.
Although the terms of the metal housing 1, the back plate 2, the display screen 3, the speaker 4, the noise collector 5, the signal emitting mechanism 6, the first sound hole 7, the slide groove 8, the slider 9, the connecting rod 10, the signal emitting rod 11, the driving motor 12, the cam plate 13, the spring 14, the notch 15, the fan set 16, the heat dissipating port 17, the T-shaped plate 18, the upper section 19, the lower section 20, the knob 21, the second sound hole 22, etc., are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (9)
1. The utility model provides a museum entrance is with propaganda display device, includes metal casing, metal casing embeds there is the cavity, and its front end is equipped with the backplate that can open and shut, can the gomphosis have a display screen on the backplate, still install integrated circuit and speaker in metal casing's the built-in cavity, a serial communication port, be equipped with the noise collector of being connected with the integrated circuit electricity in metal casing's the built-in cavity, still activity block has signal emission mechanism on the inner wall of the built-in cavity of metal casing, signal emission mechanism's top is run through metal casing and is extended and go out.
2. The propaganda and display device for entrance of museum according to claim 1, wherein the noise collector and the speaker are respectively disposed at two sides of the far end of the metal casing, and the noise collector and the speaker form an intelligent adjusting module with external devices through the signal transmitting mechanism.
3. The apparatus as claimed in claim 1, wherein the surface of the back plate has a plurality of first sound holes formed therein near the speaker.
4. The apparatus as claimed in claim 2, wherein the signal emitting mechanism comprises sliding grooves formed on two opposite inner walls of the metal casing, sliding blocks are slidably connected to the sliding grooves, a connecting rod is fixedly connected between the sliding blocks, the connecting rod spans the noise collector and the speaker, a plurality of signal emitting rods are juxtaposed on the connecting rod, the signal emitting rods are electrically connected to the internal integrated circuit, and the top of the signal emitting rods penetrates through the metal casing.
5. The propaganda display device used at the entrance of a museum according to claim 4, wherein a driving motor is fixedly connected to the outside of the metal casing, a driving shaft of the driving motor penetrates into the metal casing, a cam disc is movably mounted at the upper part of the driving motor and contacts with the connecting rod, and a spring used for matching with the cam disc is further sleeved on the signal transmitting rod.
6. The propaganda and display device used at the entrance of a museum according to claim 5, wherein the side edge of the sliding groove is provided with a notch, the position of the notch is lower than the flat placing point of the cam disc, and the sliding block is cylindrical and is used for better sliding out through the notch.
7. The apparatus as claimed in claim 4, wherein the signal emitting rods are provided with a fan set, the fan set is provided with a plurality of fan channels and electrically connected to the integrated circuit, and the bottom of the metal casing is provided with a heat dissipating port for cooperating with the fan set.
8. The apparatus as claimed in claim 4, wherein the intelligent adjusting module comprises the following steps:
s1, normal initial segment playing: fixedly electrifying at the placing position, then lifting the signal transmitting rod, starting the loudspeaker to play the preset volume decibel, and synchronously displaying the volume decibel on the display screen;
s2, noise control and regulation: after the step S1 is finished, noise collection is carried out for 3-5min, the noise collector carries out noise collection and converts the noise into an electric signal, the electric signal is transmitted out through signal transmission, and external computing equipment carries out dynamic intelligent adjustment, so that the volume of the loudspeaker is synchronously increased when the noise is high, and the volume of the loudspeaker is reduced when people are few and the noise is low;
s3, low noise and energy saving: when the crowd decibel is lower than a set certain decibel for a long time, only the noise collector is reserved for power-on operation, and the loudspeaker and the display screen are closed for energy-saving operation.
9. The apparatus for publicity and exhibition at the entrance of museum according to claim 8, wherein the above steps from S1 to S3 are performed by providing a plurality of devices to be collected to an external intelligent computing device, detecting the amount of noise and the duration of noise at different positions to determine the number of people in each area, i.e. the flow direction, and collecting the number of people into a dynamic graph to form the flow trend graph of people.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110632304.XA CN113314058A (en) | 2021-06-07 | 2021-06-07 | Museum entrance is with propaganda display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110632304.XA CN113314058A (en) | 2021-06-07 | 2021-06-07 | Museum entrance is with propaganda display device |
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| CN113314058A true CN113314058A (en) | 2021-08-27 |
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| CN202110632304.XA Pending CN113314058A (en) | 2021-06-07 | 2021-06-07 | Museum entrance is with propaganda display device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101459414A (en) * | 2007-12-12 | 2009-06-17 | 群康科技(深圳)有限公司 | Video and audio playing device and volume control method |
| CN203120141U (en) * | 2013-03-15 | 2013-08-07 | 西南大学 | Self-adaption volume regulating and controlling device of advertisement terminal |
| CN206451498U (en) * | 2016-12-20 | 2017-08-29 | 厦门中汇智自动化科技有限公司 | A kind of advertisement putting information display device |
| CN111897510A (en) * | 2020-07-30 | 2020-11-06 | 成都新潮传媒集团有限公司 | Volume adjusting method and device of multimedia equipment and computer readable storage medium |
-
2021
- 2021-06-07 CN CN202110632304.XA patent/CN113314058A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101459414A (en) * | 2007-12-12 | 2009-06-17 | 群康科技(深圳)有限公司 | Video and audio playing device and volume control method |
| CN203120141U (en) * | 2013-03-15 | 2013-08-07 | 西南大学 | Self-adaption volume regulating and controlling device of advertisement terminal |
| CN206451498U (en) * | 2016-12-20 | 2017-08-29 | 厦门中汇智自动化科技有限公司 | A kind of advertisement putting information display device |
| CN111897510A (en) * | 2020-07-30 | 2020-11-06 | 成都新潮传媒集团有限公司 | Volume adjusting method and device of multimedia equipment and computer readable storage medium |
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Application publication date: 20210827 |
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