CN209105174U - A kind of public network intercom based on 4G modem - Google Patents
A kind of public network intercom based on 4G modem Download PDFInfo
- Publication number
- CN209105174U CN209105174U CN201822175797.5U CN201822175797U CN209105174U CN 209105174 U CN209105174 U CN 209105174U CN 201822175797 U CN201822175797 U CN 201822175797U CN 209105174 U CN209105174 U CN 209105174U
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- CN
- China
- Prior art keywords
- modem
- public network
- network intercom
- key
- connects
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- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 13
- 230000002452 interceptive Effects 0.000 claims abstract description 5
- RZVAJINKPMORJF-UHFFFAOYSA-N p-acetaminophenol Chemical compound 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Abstract
The utility model discloses a kind of public network intercoms based on 4G modem, it constitutes control unit only with 4G modem, the 4G modem connects LDO by SPI connection TFT liquid crystal display, and by GPIO interface, and is electrically connected by LDO with TFT liquid crystal display；The 4G modem connects Charge Management IC, the Charge Management IC control connection battery by USB interface, and the battery connects 4G modem；The 4G modem passes through the external interactive key of GPIO interface；The 4G modem connects indicator light by GPIO interface；The 4G modem carries audio codec by PCM and IIC control.This programme uses the single system scheme being made of 4G modem, and monolithic stability is reliable, while can effectively reduce cost.
Description
Technical field
The utility model relates to intercom technologies, and in particular to public network intercom technology.
Background technique
Public network intercom is in a development ramp up, relatively compares and traditional intercom industry, public network intercommunication equipment
The advantages such as standby networking is convenient, no distance limitation, and encryption is strong.
Public network intercom mainly uses the integrated mode of 4G modem (modem)+MCU, such mode knot at present
Structure is complicated, while at high cost, so that existing public network intercom has centainly bad for traditional intercom in price
Thus gesture reduces competitive advantage of the public network intercom in intercom industry, thus largely effect on public network intercom application and
It promotes.
It can be seen that how to carry out cost optimization to public network intercom, the cost variance with traditional intercom is reduced, is increased
Public network intercom is in the competitive advantage of intercom industry, the problem of being this field urgent need to resolve.
Utility model content
For the problems of existing public network intercom, a kind of new public network intercom scheme is needed.
For this purpose, the purpose of this utility model is to provide a kind of public network intercoms based on 4G modem, to overcome
The problems of existing public network intercom.
In order to achieve the above object, the public network intercom provided by the utility model based on 4G modem, the public affairs
Net intercom constitutes control unit only with 4G modem, and the 4G modem passes through SPI connection TFT liquid crystal display
Screen, and LDO is connected by GPIO interface, and be electrically connected with TFT liquid crystal display by LDO；The 4G modem passes through USB
Interface connects Charge Management IC, the Charge Management IC control connection battery, and the battery connects 4G modem；The 4G
Modem passes through the external interactive key of GPIO interface；The 4G modem connects indicator light by GPIO interface；Institute
It states 4G modem and audio codec is carried by PCM and IIC control.
Further, the interactive key include flashlight control button, volume plus-minus key, switch key, transmitting by
Key, channel knob, function button.
Further, independent seat is set in the public network intercom and fills component, the independent seat fills component and Charge Management
IC connection.
Further, the 4G modem is also connected with SIM card.
Further, if the 4G modem is also connected with dry aerial.
Public network intercom scheme provided by the utility model, it is whole using the single system scheme being made of 4G modem
Body is reliable and stable, while can effectively reduce cost.
Detailed description of the invention
The utility model is further illustrated below in conjunction with the drawings and specific embodiments.
Fig. 1 is the circuit design block diagram of public network intercom in the utility model.
Specific embodiment
In order to be easy to understand the technical means, creative features, achievement of purpose, and effectiveness of the utility model, under
Face combines and is specifically illustrating, and the utility model is further described.
This example is complicated for existing public network intercom scenario-frame, and problem at high cost carrys out structure only with 4G modem
At the control unit (or control centre) of entire public network intercom, single system scheme thus is constituted, realizes reliable and stable public affairs
Net intercom scheme.
Referring to Fig. 1 which shows the hardware circuit design block diagram for the inexpensive public network intercom that this example provides.It can by figure
Know, using 4G modem as core, it can be achieved that screen is shown, key interaction and audio play the hardware system of this public network intercom
Deng.
The hardware system 100 of this public network intercom is mainly by 4G modem (110), TFT liquid crystal display 120, power supply system
System 130, button assembly 140, indicating lamp component 150 and audio system 160, which cooperate, to be constituted.
Wherein, 4G modem (110) control connects TFT liquid crystal display 120 to realize the man-machine display of entire intercom
Interaction.4G modem (110) is control centre, connects TFT liquid crystal display 120 by SPI interface, and GPIO (111) is controlled
System connection LDO (low pressure difference linear voltage regulator) 121, then connection TFT liquid crystal is controlled by LDO (low pressure difference linear voltage regulator) 121
Display screen 120.
Thus in the man-machine display interaction schemes constituted, using 4G modem as control core, it is logical to carry TFT liquid crystal display
SPI realization display data transmissions are crossed, carrying LDO realizes voltage conversion, above and below GPIO control realization TFT liquid crystal display
Electricity.It is not more than the screen of 320*240, using resolution ratio for the TFT liquid crystal display 120 in this example to guarantee that display is stablized
Property.
This 4G modem (110) controls power-supply system 130 to constitute the charging system of entire intercom.This power supply system first
System 130 is mainly made of the mutual cooperation of Charge Management IC (131), battery 132 and usb 1 33, Charge Management IC (131)
Control connection battery 132, the supply port of battery 132 and 4G modem (110) are attached；Meanwhile Charge Management IC (131)
It is attached by usb 1 33 and 4G modem (110).
On this basis, this example further adds an independent seat and fills component 134, the independent seat fill component 134 directly with
Charge Management IC (131) is attached.The specific structure of component 134 is filled for the independent seat, can be set according to actual needs,
Existing conventional structure such as can be used, guarantee reliability and reduce cost.
This 4G modem (110) control connection button assembly 140, realizes the interaction of key class.In this example, 4G modem
(110) various keys are directly connected to by GPIO (111), realize different keypress function interactions.
Button assembly 140 in this example mainly includes flashlight control button 141, volume plus-minus key 142, switchs and press
Key 143, transmitting key 144, channel rotation 145, function button 146 etc..It, can be according to reality for the specific constructive form of this key
Depending on demand.
This 4G modem (110) control connection indicating lamp component 150 indicates interaction to realize.In this example, 4G modem
(110) it is directly connected to control triode by GPIO (111) and realizes indicator light correlation function.
In this example includes three kinds of indicator lights formed by BJT (bipolar junction transistor): tri-colour LED 151,
Press key lamp 152 and flashlight 153, three is set side by side, and is attached respectively by GPIO (111) with 4G modem (110).
This 4G modem (110) control connects audio system 160 to realize speech enabled.Audio system in this example
160 are mainly made of Audio codec (audio codec) 161, loudspeaker 162, the mutual cooperation of MIC module 163.Wherein,
Audio codec (161) and 4G modem (110) is attached, and connects loudspeaker 162 by audio frequency power amplifier module 164；It should
Audio codec (161) is also directly connected to MIC module 163；The Audio codec (161) as needed can also connect earphone
165。
Thus it in the speech enabled scheme constituted, can be carried by PCM audio stream and IIC control by 4G modem (110)
Audio codec (audio codec) 161 realize that the basic function of speech enabled, audio pass through MIC module 163 and input
Into Audio codec (161), 4G modem (110) are transferred to after Audio codec (161) decoding；Audio output is by 4G
Modem (110) is transferred to Audio codec (161), if necessary to biggish volume, can be carried out by audio frequency power amplifier module 164
Processing, then reach loudspeaker 162.
On this basis, 4G modem (110) of this example in is if be also directly connected to dry aerial by antenna structure
170。
Meanwhile 4G modem (110) of this example in is also directly connected to SIM card module 180.
This example is based on the single system public network intercom scheme that 4G modem (110) are constituted, and can not only realize public network pair
It says the basic function of machine, and guarantees stability, while the cost of entire public network intercom can also be effectively reduced, effectively improve
The competitiveness of public network intercom.
Basic principles, main features, and advantages of the present invention has been shown and described above.Current row
The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments
Only illustrate the principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model is also
It will have various changes and improvements, these various changes and improvements fall within the scope of the claimed invention.The utility model
Claimed range is defined by the appending claims and its equivalent thereof.
Claims (5)
1. the public network intercom based on 4G modem, which is characterized in that the public network intercom is only with 4G modulation /demodulation
Device constitutes control unit, and the 4G modem is connected by SPI connection TFT liquid crystal display, and by GPIO interface
LDO, and be electrically connected by LDO with TFT liquid crystal display；The 4G modem connects Charge Management IC, institute by USB interface
Charge Management IC control connection battery is stated, the battery connects 4G modem；The 4G modem is connect by GPIO
The external interactive key of mouth；The 4G modem connects indicator light by GPIO interface；The 4G modem passes through PCM
It is controlled with IIC and carries audio codec.
2. public network intercom according to claim 1, which is characterized in that the interactive key include flashlight control by
Key, volume plus-minus key, switch key, transmitting key, channel knob, function button.
3. public network intercom according to claim 1, which is characterized in that state and independent seat is arranged in public network intercom fills group
Part, the independent seat fill component and connect with Charge Management IC.
4. public network intercom according to claim 1, which is characterized in that the 4G modem is also connected with SIM card.
5. public network intercom according to claim 1, which is characterized in that the 4G modem is also connected with several days
Line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822175797.5U CN209105174U (en) | 2018-12-24 | 2018-12-24 | A kind of public network intercom based on 4G modem |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822175797.5U CN209105174U (en) | 2018-12-24 | 2018-12-24 | A kind of public network intercom based on 4G modem |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209105174U true CN209105174U (en) | 2019-07-12 |
Family
ID=67163241
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822175797.5U Active CN209105174U (en) | 2018-12-24 | 2018-12-24 | A kind of public network intercom based on 4G modem |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209105174U (en) |
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2018
- 2018-12-24 CN CN201822175797.5U patent/CN209105174U/en active Active
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Denomination of utility model: A public network interphone based on 4G modem Effective date of registration: 20211217 Granted publication date: 20190712 Pledgee: Societe Generale Bank Co.,Ltd. Qingpu Branch of Shanghai Pledgor: SHANGHAI SHUGUO TECHNOLOGY Co.,Ltd. Registration number: Y2021310000141 |