CN108337418A - A kind of intelligent dual-mode law-enforcing recorder based on Android platform - Google Patents
A kind of intelligent dual-mode law-enforcing recorder based on Android platform Download PDFInfo
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- CN108337418A CN108337418A CN201810276684.6A CN201810276684A CN108337418A CN 108337418 A CN108337418 A CN 108337418A CN 201810276684 A CN201810276684 A CN 201810276684A CN 108337418 A CN108337418 A CN 108337418A
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- 238000004891 communication Methods 0.000 claims abstract description 33
- 230000015654 memory Effects 0.000 claims abstract description 22
- 238000007726 management method Methods 0.000 claims description 30
- 238000013500 data storage Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 3
- 230000006870 function Effects 0.000 abstract description 24
- 230000004297 night vision Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 230000037452 priming Effects 0.000 description 2
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 1
- 230000009429 distress Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 230000002618 waking effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
Abstract
The present invention is suitable for law-enforcing recorder technical field, provides a kind of intelligent dual-mode law-enforcing recorder based on Android platform comprising：The whole network leads to communication module, preposition photographing module, voice talk module, first power management module, power module wirelessly communicate locating module, touch control display module, the first memory module, Android platform chip, first key-press module, second source management module, voice acquisition module, video recording photographing module, second memory module, control module, the second key-press module and USB interface.The present invention is by providing a kind of law-enforcing recorder including Android platform chip and control module, control module is set to have video recording and recording control function, Android platform chip realizes speech talkback, takes pictures and communicate location control function, so that law-enforcing recorder does not need complete machine unlatching when realizing recording function, only control module is needed to work, Android platform chip suspend mode or can not work, to effectively reduce the power consumption of law-enforcing recorder.
Description
Technical field
The invention belongs to law-enforcing recorder technical fields more particularly to a kind of intelligent dual-mode based on Android platform to enforce the law and remember
Record instrument.
Background technology
It is the law enforcement work of law enfrocement official in the appearance of law-enforcing recorder technical field, various portable intelligent law-enforcing recorders
Bring facility.Common law-enforcing recorder, which is generally configured with, takes pictures, records a video and sound-recording function, is able to record holding for law enfrocement official
Method process provides evidence for subsequent dispute processing and Safeguarding Lawful Rights.
However, existing law-enforcing recorder is when realizing recording function, it usually needs complete machine turns on into working condition, work(
Consumption is higher, cannot be satisfied prolonged continuous law enforcement job requirements.
Invention content
In view of this, an embodiment of the present invention provides a kind of intelligent dual-mode law-enforcing recorder based on Android platform, with solution
Certainly existing law-enforcing recorder takes pictures in realization, records a video or when sound-recording function, it usually needs complete machine turns on into working condition, work(
Consumption is higher, cannot be satisfied the problem of continuously enforcing the law job requirements for a long time.
The embodiment of the present invention provides a kind of intelligent dual-mode law-enforcing recorder based on Android platform comprising：
The whole network leads to communication module；
Preposition photographing module；
Voice talk module；
First power management module；
The power module being connect with first power management module；
Wirelessly communicate locating module；
Touch control display module；
First memory module；
It connects and controls described the whole network and lead to communication module, the preposition photographing module, the voice talk module, described the
The work of one power management module, the wireless communication locating module, the touch control display module and first memory module
The Android platform chip of state；
It is connect with the Android platform chip, triggers the first power management module described in the Android platform chip controls and connect
On-off opens the power supply that the power module provides and is switched on controlling the intelligent dual-mode law-enforcing recorder based on Android platform
Or shutdown, control the voice talk module, described the whole network leads to communication module or the wireless communication locating module is opened to send out
Go out distress signal, controls the voice talk module and described the whole network leads to communication module or the wireless communication locating module is opened
It opens to realize the first key-press module of speech talkback；
It is connect with first power management module, and the power module is obtained by first power management module
Electric energy second source management module；
Voice acquisition module；
Video recording photographing module；
Second memory module；
Connect and control the voice acquisition module, it is described video recording photographing module and second memory module work shape
State, and the control module being connect with the Android platform chip；
It is connect with the control module, triggers the control module and control the voice acquisition module unlatching with live pick-up
Or record under RECORD mode, it controls the video recording photographing module and opens to enter the second button of RECORD mode or exposal model
Module.
The USB interface being connect with the Android platform chip and the control module.
In one embodiment, it includes that the 4G the whole networks being connect with the Android platform chip lead to that described the whole network, which leads to communication module,
Antenna and 4G the whole networks lead to deck；
The voice talk module includes the intercommunication MIC and loudspeaker being connect with the Android platform chip；
The wireless communication locating module include the GPS module being connect with the Android platform chip, Beidou positioning module,
The antenna of WiFi module, bluetooth module and NFC module, the GPS module and the Beidou positioning module is non-ceramic antenna, institute
It is 2.4G and 5G bimodulus WiFi modules to state WiFi module, and the bluetooth module is the bluetooth module of bluetooth 4.0 and the above version, institute
NFC module is stated to be set on the battery or battery cover of the intelligent dual-mode law-enforcing recorder based on Android platform and body can be read
Part card；
The touch control display module includes the LCD and multi-point touch-control panel being connect with the Android platform chip；
First key-press module includes the machine open/close button being connect with the Android platform chip, emergency button and language
Sound intercom push key.
In one embodiment, the power module includes connecting with first power management module and removably leading
The capacity of battery and non-removable secondary cell, the main battery is more than the secondary cell.
In one embodiment, first memory module includes the first TF card being connect with the Android platform chip
Slot, MCP memories and the detachable encryption TF card for being installed on the first TF card slot.
In one embodiment, the voice acquisition module includes the video recording recording MIC being connect with the control module；
Second key-press module includes the key shoot button being connect with the control module, a key camera button, one
Key record button and a key label button.
In one embodiment, second memory module includes the ROM, RAM being connect with the control module, is located at institute
It states the second TF card seat and non-dismountable formula inside the intelligent dual-mode law-enforcing recorder based on Android platform and is installed on described second
The data storage TF card of TF card seat.
In one embodiment, the video recording photographing module include the night-viewable camera that is connect with the control module with
And it is set to several night vision light filling infrared lamps and the double-colored temperature white light of several dim light light fillings of the night-viewable camera.
In one embodiment, the Android platform chip passes through I/O interfaces, UART interface and UVC protocol interfaces respectively
It is connect with the control module, the USB interface passes through UVC protocol interfaces and the Android platform chip and the control module
Connection.
In one embodiment, the Android platform chip is 8909 chips of Android Qualcomm, the control mould
Block is Ambrella A12 chips.
In one embodiment, further include the earphone interface being connect with the Android platform chip and with it is described first electricity
Two charging contacts of source control module connection.
The present invention makes control module have by providing a kind of law-enforcing recorder including Android platform chip and control module
Priming picture and recording control function, Android platform chip realize speech talkback, take pictures and communicate location control function so that enforce the law
Recorder does not need complete machine unlatching when realizing recording function, it is only necessary to which control module works, and Android platform chip can suspend mode or not
Work, to effectively reduce the power consumption of law-enforcing recorder.
Description of the drawings
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description be only the present invention some
Embodiment for those of ordinary skill in the art without having to pay creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the basic structure signal of the intelligent dual-mode law-enforcing recorder provided in an embodiment of the present invention based on Android platform
Figure；
Fig. 2 is the concrete structure signal of the intelligent dual-mode law-enforcing recorder provided in an embodiment of the present invention based on Android platform
Figure.
Specific implementation mode
In being described below, for illustration and not for limitation, it is proposed that such as tool of particular system structure, technology etc
Body details, to understand thoroughly the embodiment of the present invention.However, it will be clear to one skilled in the art that there is no these specific
The present invention can also be realized in the other embodiments of details.In other situations, it omits to well-known system, device, electricity
The detailed description of road and method, in case unnecessary details interferes description of the invention.
In order to illustrate technical solutions according to the invention, illustrated below by specific embodiment.
As shown in Figure 1, the embodiment of the present invention provides a kind of intelligent dual-mode law-enforcing recorder based on Android platform, packet
It includes：The whole network leads to communication module 110, preposition photographing module 120, voice talk module 130, the first power management module 140, power supply
Module 150, wireless communication locating module 160, touch control display module 170, the first memory module 180, Android platform chip 190,
First key-press module 100, second source management module 210, voice acquisition module 220, photographing module 230 of recording a video, the second storage
Module 240, control module 250, the second key-press module 260, USB interface 270.
In the present embodiment, the first power management module 140 is connect with power module 150；
Android platform chip 190 and the whole network lead to communication module 110, preposition photographing module 120, voice talk module 130, the
One power management module 140, wireless communication locating module 160, touch control display module 170 and the connection of the first memory module 180 are simultaneously
Control the working condition of each module connected to it；
First key-press module 200 is connect with Android platform chip 190, for triggering the control of Android platform chip 190 first
The power supply that power management module 140 is switched on or switched off the offer of power module 150 is held with controlling the intelligent dual-mode based on Android platform
Method recorder is switched on or shutdown, 190 control voice intercommunication module 130 of triggering Android platform chip, the whole network lead to communication module 110 or
It wirelessly communicates locating module 160 to open to send an SOS, 190 control voice intercommunication module 130 of triggering Android platform chip
And the whole network leads to communication module 110 or wireless communication locating module 160 is opened to realize speech talkback；
Second source management module 210 is connect with the first power management module 140, and passes through the first power management module
140 obtain the electric energy of power module 150；
Control module 250 connect and controls with voice acquisition module 220, video recording photographing module 230 and the second memory module 240
Make the working condition of these modules connected to it；
Second key-press module 260 is connect with control module 250, is used for 250 control voice acquisition module of trigger control module
220 unlatchings are recorded with live pick-up or under RECORD mode, are additionally operable to the control video recording photographing module 230 of trigger control module 250
It opens to enter RECORD mode or exposal model；
USB interface 270 is connect with Android platform chip 190 and control module 250.
As shown in Fig. 2, in one embodiment, it includes being connect with Android platform chip 190 that the whole network, which leads to communication module 110,
The exceedingly high line 111 of 4G the whole networks and 4G the whole networks lead to deck 112.
In a particular application, 4G the whole networks lead to the SIM that deck is used to install and connect the arbitrary network standard of operator's offer
Card.The network formats specifically supported have：GSM:850/1800/1900、WCDMA:B1/B5/B8、TD-SCDMA:B34/B39、
CDMA-2000 1X:BC0、CDMA-EVD0：BC0、LTE-TDD:B38/B39/B40/B41、LTE-FDD:B1/B3/B5/B8 etc..
In a particular application, preposition photographing module includes any type of front camera, can specifically be selected mobile whole
General miniature webcam is held, pixel of taking pictures need not have AF automatic focusing functions in 500W or so.Front camera is by pacifying
Tall and erect platform chip drives and controls, and the video or image of shooting are used as Jingwutong's function, what front camera was shot
Data are stored in the first memory module.
As shown in Fig. 2, in one embodiment, voice talk module 130 includes pair being connect with Android platform chip 190
It says and uses MIC131 and loudspeaker 132.
In a particular application, when opening video recording photographing module one key recording function of realization by the second key-press module, control
Module triggers loudspeaker by Android platform chip and sends out video recording prompt tone.
As shown in Fig. 2, in one embodiment, power module 150 includes being connect with the first power management module 140 and can
The main battery 151 and non-removable secondary cell 152 of dismounting, the capacity of main battery 151 are more than the capacity of secondary cell 152.
In a particular application, polymer battery core may be used in main battery, and capacity exists in 3000mAh or more, secondary cell capacity
100mAh or so, secondary cell can ensure to be able to maintain that during replacing main battery video recording photographing module work one section when
Between so that video recording photographing module can continue to shoot with video-corder the video of a period of time, ensure the uninterrupted of video process, the work of secondary cell
Make state specifically to be controlled by second source management module by control module.
In a particular application, wireless communication locating module includes the GPS module being connect with Android platform chip, Big Dipper positioning
The antenna of module, WiFi module, bluetooth module and NFC module, GPS module and Beidou positioning module is non-ceramic antenna, WiFi
Module is 2.4G and 5G bimodulus WiFi modules, and bluetooth module is the bluetooth module of bluetooth 4.0 and the above version, NFC module setting
In on the battery or battery cover of the intelligent dual-mode law-enforcing recorder based on Android platform and identity card can be read.
As shown in Fig. 2, in one embodiment, touch control display module 170 includes being connect with Android platform chip 190
LCD171 and multi-point touch-control panel 172.
In a particular application, the size of LCD and multi-point touch-control panel can be selected according to actual needs, for example, LCD
Can be 2.4 cun, resolution ratio be 320*480 liquid crystal display.
In a particular application, the first key-press module includes the machine open/close button being connect with Android platform chip, emergency button
With speech talkback button, these buttons can be physical button, can also be the touch controlled key realized by multi-point touch-control panel,
Machine open/close button is triggered for triggering the booting of Android platform chip controls law-enforcing recorder or shutdown, emergency button for a key
Android platform chip controls the whole network leads to communication module, voice talk module or wireless communication locating module and sends an SOS, language
Sound intercom push key opens voice talk module for key triggering Android platform chip and the whole network leads to communication module or channel radio
Believe locating module, realizes speech talkback function.
As shown in Fig. 2, in one embodiment, the first memory module 180 includes connect with Android platform chip 190
One TF card slot (not shown), MCP memories 181 and the detachable encryption TF card 182 for being installed on the first TF card slot.
In a particular application, the video of preposition photographing module shooting and image data are stored in encryption TF card.
In a particular application, Android platform chip is specially 8909 chips of Android Qualcomm.
In a particular application, the first power management module and second source management module are specially power management chip.
In a particular application, voice acquisition module includes the video recording recording MIC being connect with control module, the video and audio recording
It is mainly used for being directly realized by sound-recording function with MIC or realizes sound-recording function while video recording.
In a particular application, video recording photographing module includes the night-viewable camera being connect with control module and be set to can
The double-colored temperature white light of several night vision light filling infrared lamps and several dim light light fillings of night vision cam.The mirror of night-viewable camera
The aperture size of head is 1.8,120 degree of horizontal angle or more；It may include two and light filling infrared lamp, support i-cut night visions
Handoff functionality；It may include the double-colored temperature white light of two dim light light fillings.
Night-viewable camera is controlled by control module, and stabilization function, night vision light filling infrared lamp and i-cut night visions are cut
Function is changed by control module come drive control, dim light light filling with double-colored temperature white light by Android platform chip controls, can night
When realizing recording function depending on camera, dim light light filling is set as torch mode with white light.
Night-viewable camera and video recording recording are stored in the second memory module with the audio-video document that MIC is obtained jointly, pacify
Tall and erect platform chip controls relevant configuration option, the transmission control mould of audio and video by USB interface according to UVC transmission control protocols
It is the external flash disk patterns of UMS that the second road code stream that block obtains, which does figure and passes with video preview, configuration control module, realizes video playback
Function.To ensure power saving, under local RECORD mode, control Android platform chip enters deep sleep mode, simultaneously closes off OTG
Function, when waking up Android platform chip, OTG functions, which synchronize, to be waken up.
As shown in Fig. 2, in one embodiment, the second memory module 240 includes being connect with control module 250
ROM241, RAM242, the second TF card seat being based on inside the intelligent dual-mode law-enforcing recorder of Android platform (do not show in figure
Go out) and non-dismountable formula be installed on the data storage TF card 243 of the second TF card seat.
In a particular application, the audio, video data storage of video recording photographing module and voice acquisition module acquisition is stored with data
Use TF card.When needing the second road code stream to scheme to pass as 4G, voice data and language that control module acquires voice acquisition module
After the voice data of sound intercommunication module acquisition is overlapped, it is re-used as 4G figures and passes.
In a particular application, the second key-press module include the key shoot button being connect with control module, a key camera shooting press
Key, a key record button and a key label button.These buttons are to be set to the intelligent dual-mode law enforcement record based on Android platform
The physical button of instrument.
As shown in Fig. 2, in one embodiment, Android platform chip 190 passes through I/O interfaces 280, UART interface respectively
290 and UVC protocol interfaces 300 are connect with control module 250, and USB interface 270 passes through UVC protocol interfaces 250 and Android platform core
Piece 190 and control module 250 connect.
In a particular application, USB interface is realized by UVC Communication Control agreement trigger control modules to work(of recording a video, take pictures
Control module is set as UMS flash disk patterns by the setting of energy and the transmission of video of the second road code stream by OTG agreements, depending on
Frequency plays back；UART interface realizes that Android is flat by customized Communication Control agreement between Android platform chip and control module
Platform chip carries out relevant instruction transmission and scheme control to control module；I/O interfaces realize Android platform chip to controlling mould
Block does other relevant controls and operation.
In a particular application, control module is specially Ambrella A12 chips.
In one embodiment, the intelligent dual-mode law-enforcing recorder based on Android platform further includes connecting with Android platform chip
The earphone interface connect and two charging contacts being connect with the first power management module.
In a particular application, earphone interface is specially 3.5 earphone interfaces of standard, and two charging contacts, which are specifically as follows, to be set
The pin for being used to connect mains supply or wireless charging for being placed in the intelligent dual-mode law-enforcing recorder bottom based on Android platform touch
Point.
The present invention makes control module have by providing a kind of law-enforcing recorder including Android platform chip and control module
Priming picture and recording control function, Android platform chip realize speech talkback, take pictures and communicate location control function so that enforce the law
Recorder does not need complete machine unlatching when realizing recording function, it is only necessary to which control module works, and Android platform chip can suspend mode or not
Work, to effectively reduce the power consumption of law-enforcing recorder.
Embodiment described above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although with reference to aforementioned reality
Applying example, invention is explained in detail, it will be understood by those of ordinary skill in the art that：It still can be to aforementioned each
Technical solution recorded in embodiment is modified or equivalent replacement of some of the technical features；And these are changed
Or replace, the spirit and scope for various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution should all
It is included within protection scope of the present invention.
Claims (10)
1. a kind of intelligent dual-mode law-enforcing recorder based on Android platform, which is characterized in that including：
The whole network leads to communication module；
Preposition photographing module；
Voice talk module；
First power management module；
The power module being connect with first power management module；
Wirelessly communicate locating module；
Touch control display module；
First memory module；
It connects and controls described the whole network and lead to communication module, the preposition photographing module, the voice talk module, first electricity
The working condition of source control module, the wireless communication locating module, the touch control display module and first memory module
Android platform chip；
Connect with the Android platform chip, trigger described in the Android platform chip controls the first power management module connect or
It disconnects the power supply that the power module provides and is switched on or closes to control the intelligent dual-mode law-enforcing recorder based on Android platform
Machine controls the voice talk module, described the whole network leads to communication module or wireless communication locating module unlatching is asked with sending out
Rescue signal, control the voice talk module and described the whole network lead to communication module or wireless communication locating module unlatching with
Realize the first key-press module of speech talkback；
It is connect with first power management module, and obtains the electricity of the power module by first power management module
The second source management module of energy；
Voice acquisition module；
Video recording photographing module；
Second memory module；
The voice acquisition module, the working condition of the video recording photographing module and second memory module are connected and control,
And the control module being connect with the Android platform chip；
Connect with the control module, trigger the control module control the voice acquisition module open with live pick-up or
It records under RECORD mode, controls the video recording photographing module and open to enter the second button mould of RECORD mode or exposal model
Block.
The USB interface being connect with the Android platform chip and the control module.
2. the intelligent dual-mode law-enforcing recorder based on Android platform as described in claim 1, which is characterized in that described the whole network is logical
Communication module includes that the exceedingly high line of 4G the whole networks being connect with the Android platform chip and 4G the whole networks lead to deck；
The voice talk module includes the intercommunication MIC and loudspeaker being connect with the Android platform chip；
The wireless communication locating module includes the GPS module, Beidou positioning module, WiFi being connect with the Android platform chip
The antenna of module, bluetooth module and NFC module, the GPS module and the Beidou positioning module is non-ceramic antenna, described
WiFi module is 2.4G and 5G bimodulus WiFi modules, and the bluetooth module is the bluetooth module of bluetooth 4.0 and the above version, described
NFC module is set on the battery or battery cover of the intelligent dual-mode law-enforcing recorder based on Android platform and can read identity
Card；
The touch control display module includes the LCD and multi-point touch-control panel being connect with the Android platform chip；
First key-press module includes the machine open/close button being connect with the Android platform chip, emergency button and voice pair
Say button.
3. the intelligent dual-mode law-enforcing recorder based on Android platform as described in claim 1, which is characterized in that the power supply mould
Block includes being connect with first power management module and dismountable main battery and non-removable secondary cell, the main battery
Capacity be more than the secondary cell.
4. the intelligent dual-mode law-enforcing recorder based on Android platform as described in claim 1, which is characterized in that described first deposits
Storage module includes the first TF card slot being connect with the Android platform chip, MCP memories and detachable is installed on described the
The encryption TF card of one TF card slot.
5. the intelligent dual-mode law-enforcing recorder based on Android platform as described in claim 1, which is characterized in that the voice is adopted
It includes the video recording recording MIC being connect with the control module to collect module；
Second key-press module includes a key shoot button, a key camera button, a key record being connect with the control module
Tone keys and a key label button.
6. the intelligent dual-mode law-enforcing recorder based on Android platform as described in claim 1, which is characterized in that described second deposits
Storage module includes the ROM, RAM being connect with the control module, enforcing the law positioned at the intelligent dual-mode based on Android platform records
The second TF card seat and non-dismountable formula inside instrument are installed on the data storage TF card of the second TF card seat.
7. the intelligent dual-mode law-enforcing recorder based on Android platform as described in claim 1, which is characterized in that the video recording is taken the photograph
As module includes the night-viewable camera being connect with the control module and several nights for being set to the night-viewable camera
Depending on light filling infrared lamp and the double-colored temperature white light of several dim light light fillings.
8. the intelligent dual-mode law-enforcing recorder based on Android platform as described in claim 1, which is characterized in that the Android is flat
Platform chip is connect by I/O interfaces, UART interface and UVC protocol interfaces with the control module respectively, and the USB interface passes through
UVC protocol interfaces are connect with the Android platform chip and the control module.
9. the intelligent dual-mode law-enforcing recorder based on Android platform as described in claim 1, which is characterized in that the Android is flat
Platform chip is 8909 chips of Android Qualcomm, and the control module is AmbrellaA12 chips.
10. the intelligent dual-mode law-enforcing recorder based on Android platform as described in claim 1, which is characterized in that further include with
The earphone interface of the Android platform chip connection and two charging contacts being connect with first power management module.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109862322A (en) * | 2019-02-19 | 2019-06-07 | 深圳市研诺达科技有限公司 | A kind of audio-visual acquisition equipment of 4G based on the transmission of UVC data |
| CN110342352A (en) * | 2019-07-01 | 2019-10-18 | 比亦特网络科技（天津）有限公司 | A kind of elevator Internet of Things information interaction system |
| CN112887644A (en) * | 2021-03-25 | 2021-06-01 | 上海凡卓通讯科技有限公司 | 5G law enforcement record terminal system |
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