CN210351401U - Multifunctional conference all-in-one machine - Google Patents
Multifunctional conference all-in-one machine Download PDFInfo
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- CN210351401U CN210351401U CN201920948661.5U CN201920948661U CN210351401U CN 210351401 U CN210351401 U CN 210351401U CN 201920948661 U CN201920948661 U CN 201920948661U CN 210351401 U CN210351401 U CN 210351401U
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Abstract
The utility model discloses a multifunctional conference all-in-one machine, which comprises a central processing unit, a conference video acquisition module, a wireless communication module, a voice acquisition module, a voice playing module, a touch display screen and a power module, wherein the conference video acquisition module is connected with the central processing unit through the wireless communication module; the power module comprises a voltage input end, a first resistor, a second resistor, a first triode, a second triode, a first diode, a second voltage stabilizing diode, a third triode, a fourth diode, a third resistor, a fourth resistor, a third diode, a positive voltage output end and a negative voltage output end. The utility model discloses circuit structure is comparatively simple, the cost is lower, the security and the reliability of convenient maintenance, circuit are higher.
Description
Technical Field
The utility model relates to a meeting all-in-one circuit field, in particular to multi-functional meeting all-in-one.
Background
With the popularization of conference technology, all-in-one conference machines with large sizes and small sizes have entered modern conference rooms. Mobile terminals such as mobile phones and tablets are connected with the same router through the all-in-one machine, and wireless screen projection control of the mobile terminals can be achieved by opening the client. Is a practical choice for modern meetings, reports, speeches and training.
The conference all-in-one machine continuously erupts from 2017, and is very enthusiastic in 18 years, the conference all-in-one machine integrates the requirements of enterprise conference demonstration, interactive communication, writing and marking, remote video and the like, the traditional conference mode is revolutionarily changed, and the digital business interactive conference is comprehensively realized. The conference all-in-one machine is simple and convenient to use, the conference efficiency is high, conference exhibition and result recording are achieved, and the use experience is greatly improved.
Fig. 1 is a schematic circuit diagram of a power supply portion of a conventional all-in-one conference machine, and it can be seen from fig. 1 that the power supply portion of the conventional all-in-one conference machine has many components, a complex circuit structure, high hardware cost and inconvenient maintenance. In addition, because the power supply part of the traditional conference all-in-one machine lacks corresponding circuit protection functions, for example: the safety and reliability of the circuit are poor due to the lack of the current-limiting protection function.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, a circuit structure is comparatively simple, the cost is lower, the security and the higher multi-functional meeting all-in-one of reliability of convenient maintenance, circuit is provided.
The utility model provides a technical scheme that its technical problem adopted is: the multifunctional conference all-in-one machine comprises a central processing unit, a conference video acquisition module, a wireless communication module, a voice acquisition module, a voice playing module, a touch display screen and a power supply module, wherein the conference video acquisition module is connected with the central processing unit through the wireless communication module, the voice acquisition module is connected with the central processing unit and used for acquiring the voice of the current conference site, the voice playing module is connected with the central processing unit and used for playing the acquired voice, the touch display screen is connected with the central processing unit and used for acquiring external touch information and displaying the information, and the power supply module is connected with the central processing unit and used for supplying power;
the power supply module comprises a voltage input end, a first resistor, a second resistor, a first triode, a second triode, a first diode, a second voltage stabilizing diode, a third triode, a fourth diode, a third resistor, a fourth resistor, a third diode, an anode voltage output end and a cathode voltage output end, wherein the voltage input end is respectively connected with an emitting electrode of the first triode, an anode of the first diode, one end of the first resistor and an anode of the fourth diode, a base electrode of the first triode is connected with a collector electrode of the second triode, a collector electrode of the first triode is respectively connected with a cathode of the first diode, a cathode of the second voltage stabilizing diode and the anode voltage output end, the other end of the first resistor is respectively connected with one end of the second resistor, a base electrode of the second triode, an anode of the second voltage stabilizing diode and a collector electrode of the third triode, the cathode of the fourth diode is respectively connected with the base of the third triode, one end of the fourth resistor and the anode of the third diode, the other end of the second resistor, the emitter of the second triode, the emitter of the third triode and one end of the third resistor are all grounded, the other end of the fourth resistor is respectively connected with the other end of the third resistor, the cathode of the third diode and the negative voltage output end, and the model of the fourth diode is S-452T.
In the multifunctional conference all-in-one machine, power module still includes first electric capacity, the one end of first electric capacity respectively with the other end of first resistance, the one end of second resistance and the base of second triode are connected, the other end of first electric capacity respectively with the positive pole of second zener diode and the collecting electrode of third triode are connected, the capacitance value of first electric capacity is 180 pF.
In the multifunctional conference all-in-one machine, the power module further comprises a fifth diode, an anode of the fifth diode is connected with an emitting electrode of the voltage input end, the first triode and an anode of the fourth diode respectively, a cathode of the fifth diode is connected with one end of the first resistor and an anode of the first diode respectively, and a model of the fifth diode is E-822.
In the multifunctional conference all-in-one machine of the present invention, the first triode is a PNP type triode.
In the multifunctional conference all-in-one machine of the present invention, the second triode is an NPN type triode.
In the multifunctional conference all-in-one machine of the present invention, the third triode is an NPN type triode.
In the multifunctional conference all-in-one machine, the wireless communication module is a bluetooth module, a WiFi module, a GSM module, a GPRS module, a CDMA2000 module, a WCDMA module, a TD-SCDMA module, a Zigbee module or a LoRa module.
Implement the utility model discloses a multifunctional conference all-in-one has following beneficial effect: the conference video monitoring system is provided with a central processing unit, a conference video acquisition module, a wireless communication module, a voice acquisition module, a voice playing module, a touch display screen and a power supply module; the power module includes voltage input end, first resistance, the second resistance, first triode, the second triode, first diode, the second zener diode, the third triode, the fourth diode, the third resistance, the fourth resistance, the third diode, positive pole voltage output and negative pole voltage output, this power module compares with the power supply part of traditional multi-functional meeting all-in-one, its components and parts that use are less, owing to saved some components and parts, can reduce the hardware cost like this, in addition, the fourth diode is used for carrying out current-limiting protection, therefore circuit structure is comparatively simple, the cost is lower, convenient maintenance, 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 circuit diagram of a power supply portion of a conventional integrated conference machine;
fig. 2 is a schematic structural diagram of an embodiment of the multifunctional conference all-in-one machine of the present invention;
fig. 3 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 multifunctional conference all-in-one machine of the present invention, the structural schematic diagram of the multifunctional conference all-in-one machine is shown in fig. 1. In fig. 1, the multifunctional conference all-in-one machine comprises a central processing unit 1, a conference video acquisition module 2, a wireless communication module 3, a voice acquisition module 4, a voice playing module 5, a touch display screen 6 and a power supply module 7, wherein the conference video acquisition module 2 is connected with the central processing unit 1 through the wireless communication module 3, and is used for acquiring a current picture of a conference in real time, and is transmitted to a participant or multiple parties through a network by the central processing unit 1, the voice acquisition module 4 (comprising a plurality of microphones) is connected with the central processing unit 1 and is used for acquiring a voice of a current conference site, and after the central processing unit 1 performs noise reduction processing on the voice, the voice is output to the central processing unit 1 and is transmitted to the participant or multiple parties through the network.
The voice playing module 5 (including multiple speakers) is connected with the central processing unit 1 and is used for playing collected voice, specifically, the central processing unit 1 receives voice transmitted by a conference counterpart or multiple parties, and outputs the voice through the multiple speakers of the voice playing module 5.
The touch display screen 6 is connected with the central processing unit 1 and used for acquiring external touch information and displaying the information. Specifically, the touch display screen 6 sends the acquired external touch information to the central processing unit 1 for recognition and processing, and displays the processing result on the touch display screen 6.
In this embodiment, the central processing unit 1 employs an STM32 chip. The power module 7 is connected with the central processing unit 1 and used for supplying power to the central processing unit 1.
In this embodiment, the wireless communication module 3 is a bluetooth module, a WiFi module, a GSM module, a GPRS module, a CDMA2000 module, a WCDMA module, a TD-SCDMA module, a Zigbee module, or a LoRa module. Through setting up multiple wireless communication mode, not only can increase wireless communication mode's flexibility, can also satisfy the demand of different users and different occasions. Especially, when adopting the loRa module, its communication distance is far away, and communication performance is comparatively stable, is applicable to the occasion that requires highly to communication quality.
Fig. 3 is a schematic circuit diagram of the power module in this embodiment, in fig. 3, the power module 7 includes a voltage input terminal Vin, a first resistor R1, a second resistor R2, a first transistor Q1, a second transistor Q2, a first diode D1, a second zener diode D2, a third transistor Q3, a fourth diode D4, a third resistor R3, a fourth resistor R4, a third diode D3, a positive voltage output terminal Vo + and a negative voltage output terminal Vo —, the voltage input terminal Vin is respectively connected to an emitter of the first transistor Q1, an anode of the first diode D1, one end of the first resistor R1 and an anode of the fourth diode D4, a base of the first transistor Q1 is connected to a collector of the second transistor Q1, a collector of the first transistor Q1 is respectively connected to a cathode of the first diode D1, a cathode of the second zener diode D2 and a positive voltage output terminal 2, and a collector of the first resistor R1 is respectively connected to one end of the second resistor R2, The base of the second triode Q2, the anode of the second voltage-stabilizing diode D2 and the collector of the third triode Q3 are connected, the cathode of the fourth diode D4 is respectively connected with the base of the third triode Q3, one end of a fourth resistor R4 and the anode of the third diode D3, the other end of the second resistor R2, the emitter of the second triode Q2, the emitter of the third triode Q3 and one end of the third resistor R3 are all grounded, and the other end of the fourth resistor R4 is respectively connected with the other end of the third resistor R3, the cathode of the third diode D3 and the negative voltage output end Vo-.
Compared with the power supply part of the traditional multifunctional conference all-in-one machine in the figure 1, the power supply module 7 has the advantages of fewer used components, simpler circuit structure and convenience in maintenance, and can reduce the hardware cost due to the fact that some components are saved. The fourth diode D4 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 fourth diode D4 is located is large, the current of the branch where the fourth diode D4 is located can be reduced by the fourth diode D4, so that the branch is kept in a normal working state, and the components in the circuit are not burned out due to too large current, so that the safety and reliability of the circuit are high, and the technical effect better than that of the conventional technology is achieved by fewer components.
It should be noted that in the present embodiment, the fourth diode D4 has a model number S-452T. Of course, in practical applications, the fourth diode D4 may also be another type of diode with similar functions.
The working principle of the power module 7 is as follows: the linear voltage stabilizing circuit comprises a first resistor R1, a second resistor R2, a first triode Q1, a second triode Q2 and a second zener diode D2, an overcurrent protection circuit is formed by a third resistor R3, a fourth diode D4, a fourth resistor R4, a third diode D3 and a third triode Q3, the fourth diode D4 and the fourth resistor R4 are connected in series, the third resistor R3 serves as a current detection resistor, when the current flowing through the third resistor R3 reaches a set value, the third triode Q3 is switched on, the second triode Q2 and the first triode Q1 are switched off, and the overcurrent protection function is achieved. The first diode D1 is adopted to enable the current passing through the first triode Q1 to be very small when the linear voltage stabilizing circuit is in short circuit, so that the first triode Q1 is prevented from being burnt, and the function of short circuit protection is achieved.
In this embodiment, the first transistor Q1 is a PNP transistor, the second transistor Q2 is an NPN transistor, and the third transistor Q3 is an NPN transistor. Of course, in practical applications, the first transistor Q1 may also be an NPN-type transistor, and the second transistor Q2 and the third transistor Q3 may also be PNP-type transistors, but the circuit structure is also changed accordingly.
In this embodiment, the power module 7 further includes a first capacitor C1, one end of the first capacitor C1 is respectively connected to the other end of the first resistor R1, one end of the second resistor R2, and the base of the second transistor Q2, and the other end of the first capacitor C1 is respectively connected to the anode of the second zener diode D2 and the collector of the third transistor Q3. The first capacitor C1 is a coupling capacitor for preventing interference between the second transistor Q2 and the third transistor Q3, so as to further enhance the safety and reliability of the circuit.
The effect of the coupling capacitor is: an ac signal is passed from a previous stage to a next stage. The coupling method is also a direct coupling and a transformer coupling method. The direct coupling efficiency is highest, the signal is not distorted, but the adjustment of the front and rear two-stage working points is complex and mutually involved. In order to prevent the working point of the next stage from being affected by the previous stage, the previous stage and the next stage need to be separated in terms of direct current, and meanwhile, the alternating current signal can be smoothly transmitted from the previous stage to the next stage. They can both transmit AC signals and cut off DC, so that the working points of the front and rear stages are not involved. However, the difference is that the phase of the signal is delayed a little when the signal is transmitted by a capacitor, and the high frequency component of the signal is lost a little when the signal is transmitted by a transformer. Generally, a capacitor is commonly used as a coupling element in small signal transmission, and a transformer is commonly used as a coupling element in large signal or strong signal transmission. The utility model discloses in adopt first electric capacity C1 as coupling element, can make the operating point of back one-level not receive the influence of preceding one-level like this, also make the operating point of third triode Q3 not receive the influence of second triode Q2 exactly. The first capacitor C1 is an inter-stage coupling capacitor, and functions to isolate the dc bias circuits of the front and rear stages of the second transistor Q2 and the third transistor Q3, so as to prevent the static operating points of the front and rear stages from affecting each other. The working principle of the method utilizes the working principle of interstage coupling electricity in the prior art, and the mastiff is not described herein.
It should be noted that, in the present embodiment, the capacitance of the first capacitor C1 is 180 pF. Of course, in practical applications, the capacitance value of the first capacitor C1 may be adjusted accordingly, that is, the capacitance value of the first capacitor C1 may be increased or decreased accordingly.
In this embodiment, the power module 7 further includes a fifth diode D5, an anode of the fifth diode D5 is connected to the voltage input terminal Vin, the emitter of the first transistor Q1, and an anode of the fourth diode D4, respectively, and a cathode of the fifth diode D5 is connected to one end of the first resistor R1 and the anode of the first diode D1, respectively. The fifth diode D5 is a current limiting diode for current limiting protection. The current limiting protection principle is as follows: when the current of the branch in which the fifth diode D5 is located is large, the current of the branch in which the fifth diode D5 is located can be reduced by the fifth diode D5, so that the branch can be kept in a normal operating state, and the device in the circuit cannot be burned out due to the large current, so that the safety and reliability of the circuit are further enhanced.
It should be noted that in the present embodiment, the fifth diode D5 has a model number E-822. Of course, in practical applications, the fifth diode D5 may also be another type of diode with similar functions.
The central processing unit 1, the conference video acquisition module 2, the voice acquisition module 4, the voice playing module 5 and the touch display screen 6 are all realized by adopting structures in the prior art, the working principle of the central processing unit is also the working principle in the prior art, and the mastiff description is omitted here.
In a word, in this embodiment, compared with the power supply part of the conventional multifunctional conference all-in-one machine, the power supply module 7 has fewer used components, simpler circuit structure and convenient maintenance, and can reduce the hardware cost due to the saving of some components. In addition, since the power supply module 7 is provided with a current limiting diode, 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 multifunctional conference all-in-one machine is characterized by comprising a central processing unit, a conference video acquisition module, a wireless communication module, a voice acquisition module, a voice playing module, a touch display screen and a power supply module, wherein the conference video acquisition module is connected with the central processing unit through the wireless communication module, the voice acquisition module is connected with the central processing unit and used for acquiring voice of a current conference site, the voice playing module is connected with the central processing unit and used for playing the acquired voice, the touch display screen is connected with the central processing unit and used for acquiring external touch information and displaying the information, and the power supply module is connected with the central processing unit and used for supplying power;
the power supply module comprises a voltage input end, a first resistor, a second resistor, a first triode, a second triode, a first diode, a second voltage stabilizing diode, a third triode, a fourth diode, a third resistor, a fourth resistor, a third diode, an anode voltage output end and a cathode voltage output end, wherein the voltage input end is respectively connected with an emitting electrode of the first triode, an anode of the first diode, one end of the first resistor and an anode of the fourth diode, a base electrode of the first triode is connected with a collector electrode of the second triode, a collector electrode of the first triode is respectively connected with a cathode of the first diode, a cathode of the second voltage stabilizing diode and the anode voltage output end, the other end of the first resistor is respectively connected with one end of the second resistor, a base electrode of the second triode, an anode of the second voltage stabilizing diode and a collector electrode of the third triode, the cathode of the fourth diode is respectively connected with the base of the third triode, one end of the fourth resistor and the anode of the third diode, the other end of the second resistor, the emitter of the second triode, the emitter of the third triode and one end of the third resistor are all grounded, the other end of the fourth resistor is respectively connected with the other end of the third resistor, the cathode of the third diode and the negative voltage output end, and the model of the fourth diode is S-452T.
2. The multifunctional conference all-in-one machine as claimed in claim 1, wherein the power module further comprises a first capacitor, one end of the first capacitor is respectively connected with the other end of the first resistor, one end of the second resistor and the base of the second triode, the other end of the first capacitor is respectively connected with the anode of the second zener diode and the collector of the third triode, and the capacitance value of the first capacitor is 180 pF.
3. The multifunctional conference all-in-one machine of claim 2, wherein the power module further comprises a fifth diode, an anode of the fifth diode is respectively connected with the voltage input end, an emitter of the first triode and an anode of the fourth diode, a cathode of the fifth diode is respectively connected with one end of the first resistor and an anode of the first diode, and the fifth diode is E-822 in model.
4. The multifunctional conference all-in-one machine of any one of claims 1 to 3, wherein the first triode is a PNP type triode.
5. The multifunctional integrated conference machine according to any one of claims 1 to 3, wherein the second triode is an NPN triode.
6. The multifunctional conference all-in-one machine of any one of claims 1 to 3, wherein the third triode is an NPN type triode.
7. The multifunctional conference all-in-one machine of any one of claims 1 to 3, wherein the wireless communication module is a Bluetooth module, a WiFi module, a GSM module, a GPRS module, a CDMA2000 module, a WCDMA module, a TD-SCDMA module, a Zigbee module or a LoRa module.
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| CN201920948661.5U CN210351401U (en) | 2019-06-21 | 2019-06-21 | Multifunctional conference all-in-one machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112653869A (en) * | 2020-12-29 | 2021-04-13 | 南方电网深圳数字电网研究院有限公司 | Intelligent conference all-in-one machine, intelligent conference system and intelligent conference implementation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112653869A (en) * | 2020-12-29 | 2021-04-13 | 南方电网深圳数字电网研究院有限公司 | Intelligent conference all-in-one machine, intelligent conference system and intelligent conference implementation method |
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