CN202663499U - Visual intercommunication device for hearing loss group - Google Patents
Visual intercommunication device for hearing loss group Download PDFInfo
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- CN202663499U CN202663499U CN 201120567631 CN201120567631U CN202663499U CN 202663499 U CN202663499 U CN 202663499U CN 201120567631 CN201120567631 CN 201120567631 CN 201120567631 U CN201120567631 U CN 201120567631U CN 202663499 U CN202663499 U CN 202663499U
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Abstract
The utility model provides a visual intercommunication device for a hearing loss group. The visual intercommunication device for the hearing loss group comprises a door machine and an indoor terminal, wherein the indoor terminal comprises a main control chip, a door machine interface, a video decoding circuit, an audio circuit, an LM386 circuit, a communication coding and decoding circuit and a power supply circuit and is characterized by further comprising an antenna driving circuit and an earphone. The visual intercommunication device for the hearing loss group employs the antenna driving circuit to connect with the LM386 circuit, is used for sending indoor sound for the hearing loss group and making the hearing loss group access to the sound of the indoor terminal through the matched earphone, successively makes an intercommunication function for the hearing loss group be applied in an intercommunication field, brings about convenience for the hearing loss group and improves cost performance of products.
Description
Technical field
The utility model belongs to security protection intercommunication field, particularly has the visual intercommunication device for the hearing loss crowd.
Background technology
At present, existing security protection intercommunication series products only uses for the normal people of hearing, does not consider the crowd of power hard of hearing, such as the old man of family etc.The talk back equipment indoor terminal for the hearing loss crowd of chamois, the indoor set audio frequency adopts wireless transmission, full built-in aerial design, the crowd of power hard of hearing can very clearly hear intercommunication sound in front of the door, and adopts GUI to show, the interface is clear, novel; The tinkle of bells can oneself be selected and record, and can control the sound size on the interface, and can capture in front of the door the machine video image and unblank, and machine video, audio frequency, control signal adopt the transmission of two lines in front of the door.The portable and smart exquisiteness of outward appearance has the Smart Home function.
The utility model content
The technical problems to be solved in the utility model is to provide a kind of visual intercommunication device for the hearing loss crowd.
The utility model is achieved in that a kind of visual intercommunication device for the hearing loss crowd, comprises in front of the door machine and indoor terminal, and described indoor terminal comprises:
Main control chip is used for OSD demonstration and IO control;
The machine interface is connected in front of the door machine, video decode circuit, voicefrequency circuit, communication coding-decoding circuit and power circuit in front of the door, as the interface that carries out video, audio frequency, communication transfer and power supply access with machine in front of the door;
The video decode circuit is connected to main control chip and machine interface in front of the door, is used for FM video demodulator and vision signal and transforms;
Voicefrequency circuit is connected to main control chip and reaches in front of the door machine interface, for machine and indoor terminal carry out the audio frequency intercommunication in front of the door;
The LM386 circuit is connected to voicefrequency circuit, is used for the Audio power amplifier that indoor terminal receives sound;
The communication coding-decoding circuit is connected to main control chip and reaches in front of the door machine interface, is used for the Code And Decode of communication code;
Power circuit is connected to main control chip and machine interface in front of the door, is used for system power supply;
It is characterized in that described indoor terminal also comprises:
Antenna drive circuit is connected to the LM386 circuit, is used for driving to the antenna of sound in the hearing loss crowd dispatcher's office;
Earphone is connected by wired or wireless with indoor terminal, is used for answering the sound of indoor terminal to the hearing loss crowd.
Described indoor terminal also comprises: the LCD Interface circuit, be connected to main control chip, and be used for the liquid crystal display screen display interface; The LCD backlight circuit is connected to main control chip, is used for liquid crystal display screen demonstration backlight.
Described indoor terminal also comprises: usb circuit, be connected to main control chip, and be used for upgrading main control chip program; Reset circuit is connected to main control chip, is used for providing systematic reset signal.
Described main control chip adopts the RK2708 chip.
Described video decode circuit is to reconcile chip LA72910 by the FM video FM code signal is decoded into the CVBS signal, then by the TVP5150 chip CVBS signal is changed into 656 signals that main control chip can receive.
Described voicefrequency circuit comprises that a both hands-free voice transforms chip MC34118.
Described communication coding and decoding circuit adopt the two-wire system communication, decode with the LM567 chip, encode with the 74HC1G08 chip.
Described antenna drive circuit comprises TPA3001 chip and antenna, and the voice signal after will amplifying through LM386 circuit volume carries out secondary with the TPA3001 chip and amplifies, and then is connected to antenna and is transmitted to the earphone reception.
Described antenna drive circuit also comprises a regulating circuit that is connected to form by resistance R 1, R2, R10, R11, is used for regulating the rank of TPA3001 chip multiplication factor.
Described earphone comprises inside antenna, AD620 amplification chip and toy trumpet, receives signal by inside antenna, then is amplified to toy trumpet by AD620.
The utility model has the advantage of: the utility model adopts antenna drive circuit to be connected to the LM386 circuit, be used for to sound in the hearing loss crowd dispatcher's office and answer the sound of indoor terminal by supporting earphone to the hearing loss crowd, success will be applied to for hearing loss crowd's intercommunication function the intercommunication field, the crowd provides convenience for hearing loss, has promoted the cost performance of product.
Description of drawings
In conjunction with the embodiments the utility model is further described with reference to the accompanying drawings.
Fig. 1 is the overall system diagram of the visual intercommunication device for the hearing loss crowd of the present utility model.
Fig. 2 is the circuit diagram of main control chip of the present utility model.
Fig. 3 is the connection layout of usb circuit of the present utility model.
Fig. 4 is the connection layout of reset circuit of the present utility model.
Fig. 5 and Fig. 5 the-the 1st, the connection layout of video decode circuit of the present utility model.
Fig. 6 is the connection layout of voicefrequency circuit of the present utility model.
Fig. 7 is the connection layout of LM386 circuit of the present utility model.
Fig. 8 is the connection layout of LCD Interface circuit of the present utility model.
Fig. 9 is the connection layout of communication coding-decoding circuit of the present utility model.
Figure 10 and Figure 10 the-the 1st, the connection layout of power circuit of the present utility model.
Figure 11 is the connection layout of LCD backlight circuit of the present utility model.
Figure 12 is the connection layout of antenna drive circuit of the present utility model.
Figure 13 is the circuit connection diagram of earphone of the present utility model.
Figure 14 is the connection layout of constant-current source circuit of the present utility model.
Embodiment
See also Fig. 1, it is the overall system diagram of the visual intercommunication device for the hearing loss crowd of the present utility model, a kind of visual intercommunication device for the hearing loss crowd, comprise in front of the door machine and indoor terminal, described indoor terminal comprises: main control chip, machine interface in front of the door, the video decode circuit, voicefrequency circuit, the LM386 circuit, the communication coding-decoding circuit, power circuit, constant-current source circuit, antenna drive circuit, earphone, the LCD Interface circuit, the LCD backlight circuit, usb circuit and reset circuit, described video decode circuit, voicefrequency circuit, the communication coding-decoding circuit, power circuit, the LCD Interface circuit, the LCD backlight circuit, usb circuit and reset circuit are connected respectively to main control chip, the LM386 circuit is connected between voicefrequency circuit and the antenna drive circuit, the video decode circuit, voicefrequency circuit, the communication coding-decoding circuit is connected respectively in front of the door machine interface, and power circuit is connected in front of the door machine interface after by constant-current source circuit.
Seeing also Fig. 2, is the circuit diagram of main control chip of the present utility model.Described main control chip adopts the RK2708 chip to be used for OSD demonstration and IO control, and it has the ARM+DSP dual core processor; Built-in 8-bits hardware ECC algorithm is supported complete series NAND FLASH; Built-in TFT controller supports 260,000 looks to show, supports various LCDs; The USB high-speed transfer, the highest writing rate can reach 4MB; Built-in high-performance audio converter (CODEC) is exported perfect tonequality; Support SD/SDHC/MMC card expansion.
Seeing also Fig. 3, is the connection layout of usb circuit of the present utility model.Described USB interface is used for the RK2708 chip is carried out program upgrade, as long as plug the USB line, just can carry out ROMPaq to indoor set, for refresh routine has brought convenience.
Seeing also Fig. 4, is the connection layout of reset circuit of the present utility model.Described reset circuit is connected to main control chip and is used for providing systematic reset signal.
Seeing also Fig. 5 and Fig. 5-1, is the connection layout of video decode circuit of the present utility model.Described video decode circuit is connected to main control chip and machine interface in front of the door, mainly is by LA72910 the FM code signal to be decoded into the CVBS signal, then by TVP5150 the CVBS signal is changed into 656 signals that GL2708 can receive.
Seeing also Fig. 6, is the connection layout of voicefrequency circuit of the present utility model.Described voicefrequency circuit is connected to main control chip and reaches in front of the door machine interface, for machine and indoor terminal carry out the audio frequency intercommunication in front of the door; It mainly comprises a ML34118 chip, MC34118 is that the quasi-duplex both hands-free voice transforms chip, formed by amplifier, level detector, attenuator, monitor, filter and control unit, in order to improve the gain of Speaker or Mic binary channels, the communication of realization quasi-duplex, adopted balanced detector and for the complementary compression method of monitoring signal, made the phone have " loudspeaker " effect.Chip has three kinds of operating state: full gain+6dB, minimal attenuation-46dB and free time-20dB.If one passage is+6dB, other one must be-46dB, and perhaps the input of this attenuator of while-20dB. is from seven aspects: monitor, dialing tone detector, volume level detector and AGC detector are received/sent out to I/O level detector, noise.
Seeing also Fig. 7, is the connection layout of LM386 circuit of the present utility model.Described LM386 circuit is connected to voicefrequency circuit and is used for the Audio power amplifier that indoor terminal receives sound; LM386 chip power output: 1.5W, operating voltage: 5V-18V, the low-power consumption shutdown mode and the internal heat turn-off protection that possess external control are machine-processed.Its gain can be configured by non-essential resistance.Need not coupling capacitance, shunt capacitance and buffer network, only need few peripheral components.
Seeing also Fig. 8, is the connection layout of LCD Interface circuit of the present utility model.Described LCD Interface circuit adopts 4.3 cun Sunsang screen interfaces; Wherein, LCD_HSYNC provides line synchronizing signal, and LCD_VSYNC provides field sync signal, and LCD_DEN shows enable signal.Each of RGB (LCD0-LCD17) three roadbed chrominance signals all uses an independent data wire to transmit.
Seeing also Fig. 9, is the connection layout of communication coding-decoding circuit of the present utility model.Described communication coding and decoding circuit adopt the two-wire system communication, decode with the LM567 chip, encode with the 74HC1G08 chip, and it is 345.6KHz that carrier wave carries out frequency division by crystal oscillator.
Seeing also Figure 10 and Figure 10-1, is the connection layout of power circuit of the present utility model.Described power circuit mainly is comprised of two TPS5430, one provides 5V to RT9011, RT9167, RT9284 and peripheral circuit power supply, RT9011 is converted into two groups of 3.3V and powers to GL2708, and RT9167 is converted into 3.3V to the screen power supply, and RT9284 is converted into 1.27V and powers to GL2708.One provides 12V to TPA3001, LM386, relay and peripheral circuit power supply.
Seeing also Figure 11, is the connection layout of LCD backlight circuit of the present utility model.Described LCD backlight circuit adopts MP3302 to drive, and MP3302 can use the PWM light modulation, adopts the brightness of Controlled in Current Mode and Based screen, and its 195MV feedback voltage has reduced the loss of energy, and has improved efficient, if when opening a way overvoltage, MP3302 can close voluntarily.
Seeing also Figure 12, is the connection layout of antenna drive circuit of the present utility model.Described antenna drives and adopts the TPA3001 chip controls, and it is to carry out secondary with TPA3001 again after amplifying by LM386 circuit volume to amplify, and then is connected to antenna, and J6 is antenna.R1, R2, R10, R11 can regulate the rank of multiplication factor, also can regulate by the gui interface on the interface.Behind the antenna transmission, adopt special earphone to receive afterwards and answer to crowd hard of hearing.
TPA3001 is 20W monophony hige efficiency class D amplifier, has power source short-circuit protection, and the bottom has heat radiating fins, and can eliminate heating.Can drive the loudspeaker of 4 ohm or 8 ohm, need not filter, only need a ferrite bean to reduce EMI.The gain of amplifying is by GAIN0, GAIN1 control, is adjustable as 12,18,23.6, the 36dB gain.
Seeing also Figure 13, is the circuit connection diagram of earphone of the present utility model.After the audio emission of indoor terminal, earphone receives signal by inside antenna L1, then be amplified to toy trumpet J1 by the AD620 chip, after crowd hard of hearing is with upper earphone, just can hear sound, adjustable resistance VR1 can regulate the size of sound, can be regulated according to the hearing of oneself by the user.
Seeing also Figure 14, is the connection layout of constant-current source circuit of the present utility model.The power supply of described constant-current source circuit is except supplying with in front of the door machine, and audio frequency, video and communication code stream also transmit at this power line, and this circuit also has overcurrent and short-circuit protection simultaneously.
During use, main control chip RK2708 by the communication coding-decoding circuit and in front of the door machine carry out communication, control voicefrequency circuit, LM386 circuit and antenna drive circuit and video decode circuit, give received sound and the video image of indoor transmission, be positioned at indoor power user hard of hearing by listening to sound by earphone, and carry out communication by the image that the indoor terminal liquid crystal display screen shows, make indoor terminal carry out video intercom with machine in front of the door, capture picture, the action such as the front lock that opens the door.
Claims (10)
1. one kind can comprise in front of the door machine and indoor terminal for hearing loss crowd's visual intercommunication device, and described indoor terminal comprises:
Main control chip is used for OSD demonstration and IO control;
Machine interface in front of the door is as the interface that carries out video, audio frequency, communication transfer and power supply access with machine in front of the door;
The video decode circuit is connected to main control chip and machine interface in front of the door, is used for FM video demodulator and vision signal and transforms;
Voicefrequency circuit is connected to main control chip and reaches in front of the door machine interface, for machine and indoor terminal carry out the audio frequency intercommunication in front of the door;
The LM386 circuit is connected to voicefrequency circuit, is used for the Audio power amplifier that indoor terminal receives sound;
The communication coding-decoding circuit is connected to main control chip and reaches in front of the door machine interface, is used for the Code And Decode of communication code;
Power circuit is connected to main control chip and machine interface in front of the door, is used for system power supply;
It is characterized in that described indoor terminal also comprises:
Antenna drive circuit is connected to the LM386 circuit, is used for driving to the antenna of sound in the hearing loss crowd dispatcher's office;
Earphone is connected by wired or wireless with indoor terminal, is used for answering the sound of indoor terminal to the hearing loss crowd.
2. described visual intercommunication device for the hearing loss crowd according to claim 1, it is characterized in that: described indoor terminal also comprises: the LCD Interface circuit, be connected to main control chip, be used for the liquid crystal display screen display interface; The LCD backlight circuit is connected to main control chip, is used for liquid crystal display screen demonstration backlight.
3. described visual intercommunication device for the hearing loss crowd according to claim 1, it is characterized in that: described indoor terminal also comprises: usb circuit, be connected to main control chip, be used for upgrading main control chip program; Reset circuit is connected to main control chip, is used for providing systematic reset signal.
4. described visual intercommunication device for the hearing loss crowd according to claim 1, it is characterized in that: described main control chip adopts the RK2708 chip.
5. described visual intercommunication device for the hearing loss crowd according to claim 1, it is characterized in that: described video decode circuit is to reconcile chip LA72910 by the FM video FM code signal is decoded into the CVBS signal, then by the TVP5150 chip CVBS signal is changed into 656 signals that main control chip can receive.
6. described visual intercommunication device for the hearing loss crowd according to claim 1, it is characterized in that: described voicefrequency circuit is to comprise that a both hands-free voice transforms chip MC34118.
7. described visual intercommunication device for the hearing loss crowd according to claim 1, it is characterized in that: described communication coding and decoding circuit adopt the two-wire system communication, decode with the LM567 chip, encode with the 74HC1G08 chip.
8. described visual intercommunication device for the hearing loss crowd according to claim 1, it is characterized in that: described antenna drive circuit comprises TPA3001 chip and antenna, voice signal after will amplifying through LM386 circuit volume carries out secondary with the TPA3001 chip and amplifies, and then is connected to antenna and is transmitted to the earphone reception.
9. the visual intercommunication device for the hearing loss crowd according to claim 8, it is characterized in that: described antenna drive circuit also comprises a regulating circuit that is connected to form by resistance R 1, R2, R10, R11, is used for regulating the rank of TPA3001 chip multiplication factor.
10. described visual intercommunication device for the hearing loss crowd according to claim 1, it is characterized in that: described earphone comprises inside antenna, AD620 amplification chip and toy trumpet, receive signal by inside antenna, then be amplified to toy trumpet by AD620.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120567631 CN202663499U (en) | 2011-12-30 | 2011-12-30 | Visual intercommunication device for hearing loss group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120567631 CN202663499U (en) | 2011-12-30 | 2011-12-30 | Visual intercommunication device for hearing loss group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202663499U true CN202663499U (en) | 2013-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120567631 Expired - Fee Related CN202663499U (en) | 2011-12-30 | 2011-12-30 | Visual intercommunication device for hearing loss group |
Country Status (1)
| Country | Link |
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| CN (1) | CN202663499U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102547240A (en) * | 2011-12-30 | 2012-07-04 | 福建省冠林科技有限公司 | Visible talk back equipment used by crowds with hearing loss |
-
2011
- 2011-12-30 CN CN 201120567631 patent/CN202663499U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102547240A (en) * | 2011-12-30 | 2012-07-04 | 福建省冠林科技有限公司 | Visible talk back equipment used by crowds with hearing loss |
| CN102547240B (en) * | 2011-12-30 | 2017-01-25 | 福建省冠林科技有限公司 | Visible talk back equipment used by crowds with hearing loss |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130109 Termination date: 20141230 |
|
| EXPY | Termination of patent right or utility model |