CN211018656U - Display system of multimedia exhibition hall - Google Patents
Display system of multimedia exhibition hall Download PDFInfo
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- CN211018656U CN211018656U CN201921751997.9U CN201921751997U CN211018656U CN 211018656 U CN211018656 U CN 211018656U CN 201921751997 U CN201921751997 U CN 201921751997U CN 211018656 U CN211018656 U CN 211018656U
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Abstract
The utility model discloses a display system of a multimedia exhibition hall, which comprises a mobile terminal, a network switch, a PC, a lighting lamp, a projector, a display, a sound, a stage lamp, a camera and a wireless control device, wherein the mobile terminal is connected with the PC and the wireless control device through the network switch; the network switch is internally provided with a circuit board, the circuit board is provided with a power supply module, and the power supply module comprises a voltage input end, a transformer, a first diode, a voltage output end, a first resistor, a first triode, a second resistor, a second triode, a third resistor, a third triode, a fourth resistor, a fifth resistor, a second diode and a first capacitor. Implement the utility model discloses, following beneficial effect has: the safety and the reliability of the circuit are higher.
Description
Technical Field
The utility model relates to an exhibition room field, in particular to multi-media exhibition room's display system.
Background
The multimedia exhibition hall is the main direction of exhibition and display development of museums, science and technology museums, theme venues and the like. The application of various leading-edge display technologies is considered for the design of the whole exhibition hall, and harmony between the applied technical means, equipment and historical culture contents to be represented and the overall exhibition form environment must be considered. The roaming world hypermedia center deeply excavates the background and significance contained in the exhibition object by combining and applying media such as videos, audios, animations, pictures, characters and the like, realizes the dynamic exhibition form which is difficult to realize by common exhibition means, has longitudinal deep dissection and transverse correlation expansion, promotes the coordination of the vision, the hearing and other senses and behaviors of audiences, creates brand-new visiting experience, and improves the enjoyment and exploration interests of the audiences. The power supply part of some devices in the traditional multimedia exhibition hall lacks the corresponding circuit protection function, for example: the lack of current protection results in poor safety and reliability of the circuit.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to prior art's above-mentioned defect, provide the security of a circuit and the higher multi-media exhibition room's of reliability display system.
The utility model provides a technical scheme that its technical problem adopted is: the display system for the multimedia exhibition hall is constructed and comprises a mobile terminal, a network switch, a PC (personal computer), a lighting lamp, a projector, a display, a sound box, a stage lamp, a camera and a wireless control device, wherein the mobile terminal is connected with the PC and the wireless control device through the network switch;
a circuit board is arranged in the network switch, a power supply module is arranged on the circuit board and comprises a voltage input end, a transformer, a first diode, a voltage output end, a first resistor, a first triode, a second resistor, a second triode, a third resistor, a third triode, a fourth resistor, a fifth resistor, a second diode and a first capacitor, the voltage input end is connected with one end of a primary coil of the transformer, the other end of the primary coil of the transformer is connected with a collector electrode of the third triode, one end of a secondary coil of the transformer is connected with an anode of the first diode, the other end of a secondary coil of the transformer is grounded, one end of the first resistor is respectively connected with a collector electrode of the first triode, a collector electrode of the second triode and a base electrode of the third triode, the other end of the first resistor is connected with the base electrode of the first triode, the emitter electrode of the first triode is respectively connected with one end of the second resistor, the base electrode of the second triode, one end of the third resistor, the collector electrode of the fourth triode and one end of the fifth resistor, the emitter electrode of the second triode is grounded, the emitter electrode of the third triode is respectively connected with the other end of the third resistor, one end of the fourth resistor and the emitter electrode of the fourth triode, the other end of the fourth resistor is grounded, the cathode of the first diode is respectively connected with the voltage output end, one end of the first resistor, the other end of the second resistor and the anode of the second diode, the base electrode of the fourth triode is respectively connected with the cathode of the second diode, the other end of the fifth resistor and one end of the first capacitor, and the other end of the first capacitor is grounded, the model of the second diode is S-272T.
In the display system of the multimedia exhibition room, the power supply module further includes a sixth resistor, one end of the sixth resistor is connected with the collector of the fourth triode, one end of the sixth resistor is connected with the other end of the third resistor and one end of the fifth resistor, and the resistance of the sixth resistor is 32k Ω.
In the display system of the multimedia exhibition hall, the power supply module further comprises a third diode, an anode of the third diode is connected with a collector of the first triode, a cathode of the third diode is respectively connected with a base of the third triode and a collector of the second triode, and a model of the third diode is S-562T.
In the display system of the multimedia exhibition hall of the present invention, the first triode is an NPN-type triode.
In the display system of the multimedia exhibition hall of the present invention, the second triode is an NPN-type triode.
In the display system of the multimedia exhibition hall of the present invention, the third triode is an NPN-type triode.
In the exhibition system of the multimedia exhibition hall, the fourth triode is a PNP type triode.
Implement the utility model discloses a display system in multimedia exhibition room has following beneficial effect: owing to be equipped with mobile terminal, the network switch, the PC, the light, the projector, the display, the stereo set, the stage lamp, camera and wireless control equipment, be equipped with the circuit board in the network switch, be equipped with power module on the circuit board, power module includes voltage input end, the transformer, first diode, voltage output end, first resistance, first triode, the second resistance, the second triode, the third resistance, the third triode, the fourth resistance, the fifth resistance, second diode and first electric capacity, the second diode is used for carrying out current-limiting protection, therefore the security and the reliability of circuit are higher.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of a display system of a multimedia exhibition hall according to the present invention;
fig. 2 is a schematic circuit diagram of the power supply module in the embodiment.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the embodiment of the display system of the multimedia exhibition hall of the present invention, a schematic structural diagram of the display system of the multimedia exhibition hall is shown in fig. 1. In fig. 1, the display system of the multimedia exhibition hall comprises a mobile terminal 1, a network switch 2, a PC 3, an illuminating lamp 4, a projector 5, a display 6, a sound 7, a stage lamp 8, a camera 9 and a wireless control device 10, wherein the mobile terminal 1 is connected with the PC 3 and the wireless control device 10 through the network switch 2, the PC 3 is connected with the projector 5, the display 6 and the camera 9 through a wired mode, the PC 3, the illuminating lamp 4, the projector 5, the display 6, the sound 7, the stage lamp 8 and the camera 9 are all connected with the wireless control device 10 through a wireless mode, and the mobile terminal 1 is in two-way communication with the PC 3 and the wireless control device 10.
In this embodiment, the mobile terminal 1 may be a smart phone or a tablet computer. The wireless control device 10 is provided with a digital input/output pin, an analog input/output pin, an RS485 interface, an RJ45 network interface, a wifi network interface, and the like.
In this embodiment, one PC 3 controls two displays 6, the PC 3 stores or downloads content to be displayed from a network and displays the content to the mobile terminal 1 through the network, the mobile terminal 1 is connected to the wireless control device 10 through the network, and the wireless control device 10 is connected to each display device. Meanwhile, the mobile terminal 1 is connected to the PC 3 through a network, and the PC 3 controls the display 6, the stereo 7, the stage lamp 8, the camera 9 and other playing contents, and controls the actions of the stereo 7, the illuminating lamp 4, the stage lamp 8 and other actions. In this embodiment, because each device can be connected through the network, the display system of the whole multimedia exhibition room is more flexible to realize and is convenient to maintain.
In this embodiment, the mobile terminal 1, the PC 3, the illuminating lamp 4, the projector 5, the display 6, the audio 7, the stage lamp 8, the camera 9, and the wireless control device 10 are all implemented by using a structure in the prior art, and the working principle thereof is also the working principle in the prior art, which is not described in detail herein.
In this embodiment, a circuit board is disposed in the network switch 2, and a power supply module is disposed on the circuit board. Fig. 2 is a schematic circuit diagram of the power supply module in this embodiment. In fig. 2, the power supply module includes a voltage input terminal Vin, a transformer T, a first diode D1, a voltage output terminal Vo, a first resistor R1, a first transistor Q1, a second resistor R2, a second transistor Q2, a third resistor R3, a third transistor Q3, a fourth transistor Q4, a fourth resistor R4, a fifth resistor R5, a second diode D2, and a first capacitor C1, wherein the voltage input terminal Vin is connected to one end of a primary coil of the transformer T, the other end of the primary coil of the transformer T is connected to a collector of the third transistor Q3, one end of a secondary coil of the transformer T is connected to an anode of the first diode D1, the other end of the secondary coil of the transformer T is grounded, one end of the first resistor R1 is connected to a collector of the first transistor Q1, a collector of the second transistor Q2, and a base of the third transistor Q3, and the other end of the first resistor R1 is connected to a base 1 of the first transistor Q2, an emitter of the first triode Q1 is connected to one end of the second resistor R2, a base of the second triode Q2, one end of the third resistor R3, a collector of the fourth triode Q4 and one end of the fifth resistor R5, an emitter of the second triode Q2 is grounded, an emitter of the third triode Q3 is connected to the other end of the third resistor R3, one end of the fourth resistor R4 and an emitter of the fourth triode Q4, the other end of the fourth resistor R4 is grounded, a cathode of the first diode D1 is connected to the voltage output terminal Vo, one end of the first resistor R1, the other end of the second resistor R2 and an anode of the second diode D2, a base of the fourth triode Q4 is connected to a cathode of the second diode D2, the other end of the fifth resistor R5 and one end of the first capacitor C1, and the other end of the first capacitor C1 is grounded.
In this embodiment, the second diode D2 is a current limiting diode for current limiting protection. The current limiting protection principle is as follows: when the current of the branch where the second diode D2 is located is large, the current of the branch where the second diode D2 is located can be reduced by the second diode D2, so that the branch is kept in a normal operating state, and the components in the circuit are not burned out due to the large current, so that the safety and reliability of the circuit are high. It should be noted that in the present embodiment, the second diode D2 has a model number of S-272T. Of course, in practical applications, the second diode D2 may also be another type of diode with similar functions.
In this embodiment, a voltage input terminal Vin is transformed by a transformer T, and then outputs a voltage through a voltage output terminal Vo after passing through a first diode D1, and an input terminal overcurrent protection circuit is formed by a third triode Q3, a fourth resistor R4, a second triode Q2, and other elements in the circuit. In normal operation, the fourth transistor Q4 is disabled because the emitter voltage is less than the base voltage. When the power supply output current is too large, the current of the third transistor Q3 sharply increases, and the voltage on the fourth resistor R4 rapidly rises, i.e., the emitter voltage of the fourth transistor Q4 rapidly rises. When the emitter junction voltage of the fourth triode Q4 rises to 0.7V, the fourth triode Q4 is in saturated conduction, the voltage on the fourth resistor R4 is directly applied to the base of the second triode Q2, so that the second triode Q2 is conducted, the third triode Q3 is cut off, and an overcurrent protection effect is achieved, the first resistor R1 and the first triode Q1 in the circuit form an output end overvoltage protection circuit, when the voltage of the output end is too high, the first triode Q1 is conducted through the voltage of the first resistor R1, the base of the second triode Q2 is also electrically conducted, and therefore the third triode Q3 is cut off, and the electric load is effectively protected.
In this embodiment, the first transistor Q1 is an NPN transistor, the second transistor Q2 is an NPN transistor, the third transistor Q3 is an NPN transistor, and the fourth transistor Q4 is a PNP transistor. Certainly, in practical applications, the first transistor Q1, the second transistor Q2, and the third transistor Q3 may also be PNP transistors, and the fourth transistor Q4 may also be NPN transistors, but the structure of the circuit is also changed accordingly.
In this embodiment, the power supply module further includes a sixth resistor R6, one end of the sixth resistor R6 is connected to the collector of the fourth transistor Q4, and one end of the sixth resistor R6 is connected to the other end of the third resistor R3 and one end of the fifth resistor R5, respectively. The sixth resistor R6 is a current limiting resistor, and is used for current limiting protection of the collector current of the fourth transistor Q4. The current limiting protection principle is as follows: when the collector current of the fourth triode Q4 is large, the sixth resistor R6 can reduce the collector current of the fourth triode Q4 to keep the fourth triode Q4 in a normal operating state, so that the device in the circuit is not burned out due to too large current, and the safety and reliability of the circuit are further enhanced. It should be noted that in the embodiment, the resistance value of the sixth resistor R6 is 32k Ω, and certainly, in practical applications, the resistance value of the sixth resistor R6 may be adjusted according to specific situations, that is, the resistance value of the sixth resistor R6 may be increased or decreased according to specific situations.
In this embodiment, the power supply module further includes a third diode D3, an anode of the third diode D3 is connected to a collector of the first transistor Q1, and a cathode of the third diode D3 is connected to a base of the third transistor Q3 and a collector of the second transistor Q2, respectively. The third diode D3 is a current limiting diode for current limiting protection. The current limiting protection principle is as follows: when the current of the branch where the third diode D3 is located is large, the current of the branch where the third diode D3 is located can be reduced by the third diode D3, so that the branch can be kept in a normal operating state, and the components in the circuit cannot be burned out due to the large current, so as to further enhance the safety and reliability of the circuit. It should be noted that in the present embodiment, the model of the third diode D3 is S-562T, and certainly, in practical applications, other models of diodes with similar functions may be adopted as the third diode D3.
In short, in this embodiment, since the current-limiting diode is disposed in the power supply module, the safety and reliability of the circuit are high.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A display system of a multimedia exhibition hall is characterized by comprising a mobile terminal, a network switch, a PC (personal computer), a lighting lamp, a projector, a display, a sound box, a stage lamp, a camera and a wireless control device, wherein the mobile terminal is connected with the PC and the wireless control device through the network switch;
a circuit board is arranged in the network switch, a power supply module is arranged on the circuit board and comprises a voltage input end, a transformer, a first diode, a voltage output end, a first resistor, a first triode, a second resistor, a second triode, a third resistor, a third triode, a fourth resistor, a fifth resistor, a second diode and a first capacitor, the voltage input end is connected with one end of a primary coil of the transformer, the other end of the primary coil of the transformer is connected with a collector electrode of the third triode, one end of a secondary coil of the transformer is connected with an anode of the first diode, the other end of a secondary coil of the transformer is grounded, one end of the first resistor is respectively connected with a collector electrode of the first triode, a collector electrode of the second triode and a base electrode of the third triode, the other end of the first resistor is connected with the base electrode of the first triode, the emitter electrode of the first triode is respectively connected with one end of the second resistor, the base electrode of the second triode, one end of the third resistor, the collector electrode of the fourth triode and one end of the fifth resistor, the emitter electrode of the second triode is grounded, the emitter electrode of the third triode is respectively connected with the other end of the third resistor, one end of the fourth resistor and the emitter electrode of the fourth triode, the other end of the fourth resistor is grounded, the cathode of the first diode is respectively connected with the voltage output end, one end of the first resistor, the other end of the second resistor and the anode of the second diode, the base electrode of the fourth triode is respectively connected with the cathode of the second diode, the other end of the fifth resistor and one end of the first capacitor, and the other end of the first capacitor is grounded, the model of the second diode is S-272T.
2. The system as claimed in claim 1, wherein the power supply module further comprises a sixth resistor, one end of the sixth resistor is connected to the collector of the fourth transistor, one end of the sixth resistor is connected to the other end of the third resistor and one end of the fifth resistor, respectively, and the resistance of the sixth resistor is 32k Ω.
3. The system as claimed in claim 2, wherein the power supply module further comprises a third diode, an anode of the third diode is connected to the collector of the first transistor, a cathode of the third diode is connected to the base of the third transistor and the collector of the second transistor, respectively, and the third diode has a model number of S-562T.
4. The multimedia hall presentation system of any one of claims 1 to 3 wherein the first transistor is an NPN transistor.
5. The multimedia exhibition hall of any one of claims 1 to 3, wherein said second transistor is an NPN transistor.
6. The multimedia exhibition hall of any one of claims 1 to 3, wherein said third transistor is an NPN transistor.
7. The multimedia exhibition hall of any one of claims 1 to 3, wherein said fourth transistor is a PNP transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921751997.9U CN211018656U (en) | 2019-10-17 | 2019-10-17 | Display system of multimedia exhibition hall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921751997.9U CN211018656U (en) | 2019-10-17 | 2019-10-17 | Display system of multimedia exhibition hall |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211018656U true CN211018656U (en) | 2020-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921751997.9U Active CN211018656U (en) | 2019-10-17 | 2019-10-17 | Display system of multimedia exhibition hall |
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| CN (1) | CN211018656U (en) |
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- 2019-10-17 CN CN201921751997.9U patent/CN211018656U/en active Active
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