CN207304768U - A kind of vehicle-mounted user terminal - Google Patents

Abstract

The utility model discloses a kind of vehicle-mounted user terminal, and the vehicle-mounted user terminal is by power module, controller, extensible processor, camera, GPS receiver module, 3G communication modules, display module, expansion connection module and wireless communication module composition.The controller, using CXD3142 digital signal processing chips, the controller is connected with power module, camera, GPS receiver module, 3G communication modules, display module, extensible processor and wireless communication module respectively.The user's terminal is directed to the demand for needing to transmit the wide-band-message such as vehicle location and video, transmitted using the 3G mobile communications networks with broadband transmittability, as a result of the AVS standards with China's independent intellectual property rights, international monopoly recovery risk is evaded, while the transmittability of 3G network ensure that quality monitoring.In addition, have the advantages that reliability is high, speed is fast, cost is low, small, low in energy consumption, environmental suitability is strong using the video user terminal based on DSP.

Description

A kind of vehicle-mounted user terminal

Technical field

It the utility model is related to user terminal technical field, more particularly to a kind of vehicle-mounted user terminal.

Background technology

Video monitoring is widely used in the fields such as safety monitoring, industrial monitoring and traffic monitoring at present.Video monitoring system Substantially undergo 3 stages：It is the TV monitor system based on analog signal first, its function is single, is easily disturbed and is not easy to expand Exhibition；Then there is the frequency image monitoring system based on PC machine, its termination function is stronger, but expensive, and stability is poor；In recent years, As embedded technology is ripe, embedded video acquisition processing system has reliability height, speed is fast, cost is low, small, work( Consume the advantages that low, environmental suitability is strong.

As a kind of application scenarios of video monitoring, vehicle monitoring is widely used to fortune paper money, public security, logistics, vehicle certainly The fields such as dynamic navigation, vehicle anti-theft, fire-fighting, contingency tasks and public transport intelligent traffic administration system.Vehicle monitoring system usually utilizes GPS The new and high technology such as (global positioning system), GLS (GIS-Geographic Information System), mobile communications network and computer communication network, is realized Vehicle is accurately positioned, route tracks, Real-Time Scheduling, alarm are sought help, the monitoring of information service, straighforward operation and vehicle-state.System In operation, mobile terminal uploads the composite broadband monitoring information such as gps data and video by wireless and computer network；In monitoring The heart carries out information processing, and monitor command can be also sent to mobile terminal or transmits information on services.

At present, 3G network is the mobile communications network that the current coverage in China is most extensive, technology is the most ripe, and is had Certain multimedia messaging capabilities, so, domestic vehicle monitoring system is mainly based upon GPRS network and carrys out transmission monitoring information, Compared with conventional mobile communication system, its communication quality greatly improves, and has high transmission rate.In addition, vehicle monitoring The selection of video standard in system is also increasingly valued by people, because it is automobile video frequency, monitoring product produces on a large scale The basis of industry, this is urgent problem in the prior art.

Utility model content

The purpose of this utility model is to provide a kind of vehicle-mounted user terminal, the system in view of the deficiencies of the prior art, Need to transmit the demand of the wide-band-message such as vehicle location and video for new generation of wireless vehicle monitoring system, using with broadband The 3G mobile communications networks transmission of transmittability, as a result of the AVS standards with China's independent intellectual property rights, has evaded state Border patent recovery risk, while the transmittability of 3G network ensure that quality monitoring.In addition, using the video user based on DSP Terminal has the advantages that reliability is high, speed is fast, cost is low, small, low in energy consumption, environmental suitability is strong.

Technical solution is as follows used by the utility model：

A kind of vehicle-mounted user terminal, the vehicle-mounted user terminal by power module, controller, extensible processor, camera, GPS receiver module, 3G communication modules, display module, expansion connection module and wireless communication module composition, it is characterised in that：

The controller, using CXD3142 digital signal processing chips, the controller respectively with power module, shooting Head, GPS receiver module, 3G communication modules, display module, extensible processor and wireless communication module connection；

The power module uses D/C power converter MC34063A and power supply changeover device chip TPS75003；

The extensible processor uses Spartan3E Series FPGA chips XC3S250E-PQ208.4Cm；

The expansion connection module includes serial communication interface and USB interface, and wherein serial communication interface uses SP3232E chips, USB interface use ADV7125 chips；

Preferably, the GPS receiver module uses GP3SF1513F1-S chips, and the GPS receiver module is by GPS positioning Information is sent to controller by serial port.

Preferably, the 3G communication modules select ZTE MU301 modules, which supports TD-SCDMA/H SDPA Automatically switch with GPRS/EDGE networks, which is connected by serial port with controller, completes information transmit-receive.

Preferably, the display module uses LCD12864 display modules.

Preferably, the wireless communication module uses nRF24L01 radio frequency chips.

The technical solution of the utility model, which can be obtained beneficial effect, to be included passing through real-time data acquisition, and by collection Data are transmitted to long-range central server, and server can carry out it accident analysis, and timely automated alarm, patrol officer are led to The information of detection can clearly be checked by crossing display module, save the manpower and materials of later period maintenance.

Brief description of the drawings

Fig. 1 is the schematic diagram of the vehicle-mounted user terminal；

Fig. 2 is the circuit diagram of power module；

Fig. 3 is the circuit diagram of display module.

Embodiment

In order to better illustrate the utility model, in conjunction with specific embodiment and Figure of description technical solution is made into The explanation of one step.Although having recorded these specific embodiments in embodiment, so it is not limited to the utility model, appoints What those of ordinary skill in the art, without departing from the spirit and scope of the utility model, when can make a little Change and retouch, therefore the scope of protection of the utility model is when subject to those as defined in claim.

The schematic diagram of the vehicle-mounted user terminal is as shown in Figure 1.The vehicle-mounted user terminal is by power module, controller, extension Processor, camera, GPS receiver module, 3G communication modules, display module, expansion connection module and wireless communication module group Into.The controller, using CXD3142 digital signal processing chips, the controller respectively with power module, camera, GPS Receiving module, 3G communication modules, display module, extensible processor and wireless communication module connection.The power module uses D/C power converter MC34063A and power supply changeover device chip TPS75003.The extensible processor is using Spartan3E series Fpga chip XC3S250E-PQ208.4Cm, the expansion connection module includes serial communication interface and USB interface, wherein going here and there Port communications interface uses SP3232E chips, and USB interface uses ADV7125 chips, and the GPS receiver module uses GPS positioning information is sent to controller by GP3SF1513F1-S chips, the GPS receiver module by serial port.The 3G leads to Believe that module selects ZTE MU301 modules, which supports TD-SCDMA/H SDPA and GPRS/EDGE network to automatically switch, The communication module is connected by serial port with controller, completes information transmit-receive.The display module shows mould using LCD12864 Group.The wireless communication module uses nRF24L01 radio frequency chips.

The design is using Sony Corporation dedicated signal processors part CXD3142 as signal processor.CXD3142R is special For exporting low-power consumption, the efficient signal processor that signal is handled to Ye, Cy, Mg and G complementary colors single CCD：Have Automatic exposure and from trend equilibrium function.Composite video signal and the output of YUV8 position digital signals can be exported at the same time.It is internally integrated 9 Position A/D converter circuit for generating synchronous signals, external synchronizing circuit and clock control circuit.In addition, CXD3142R also has string Port communications function.User can be in PC machine in pre-set DSP register value, DSP is downloaded to by serial ports, and to image Signal carries out the processing such as automatic exposure and automatic white balance.

In order to realize real-time pre-processed digital video signal data, increase set expandability.The equipment add it is a piece of by The Spartan3E Series FPGAs based on the manufacture of 90am techniques of Xilinx companies production are as extensible processor, its model XC3S250E-PQ208.4Cm, this FPGA have higher cost performance, have 250,000 system doors, 5508 logic units in it (LC), 612 configurable logic blocks (CLB) .12 special multiplier of block RAM of 216Kbit, 158 available I/O interfaces, 4 digital dock administrative units (DCM).

The communication of controller DSP and extensible processor FPGA is completed by 11 buses.It is 8 data lines respectively, row, Field sync signal and data clock bus.Because CXD3142RDSP exports the digital video signal of PAL (line-by-line inversion) standard. This pal video signal is converted into VGA forms by FPGA.YUV (4: 2: 2) format signal is converted into RGB (5: 6: 5) lattice first Formula, then by the use of 2 SDRAM as frame buffer, using field interpolation algorithm, completes to be interlaced to conversion line by line, and by frame per second by 25Hz is lifted to 60Hz, at the same produce SVGA forms, frame frequency is the row of 60Hz, field sync signal.Extensible processor connects with extension Mouth mold block is connected, and expansion connection module includes serial communication interface and USB interface, and wherein serial communication interface uses SP3232E chips, SP3232E can produce the RS-232C voltage levels of 2Vee, the series from the supply voltage of+3.0~+5.5V Chip is suitable for+3.3V systems, and the driver full load typical data rate of SP3232E devices is 235kb/s.USB interface is adopted With ADV7125 chips, USB interface is output to after the expanded interface module conversion of view data of amplification, can be existed when needed The image that real-time display gathers on VGA displays.

Due to using SP3232E devices, its driving force is limited, which is only applicable to short range transmission.If Transmitted at a distance, data can be sent by wireless communication module, the wireless communication module using nRF24L01 without The interface of line radio frequency chip, the CE of nRF24L01 radio-frequency modules, SCK, MISO, MOSI, the external 1K resistance of CSN and controller connects Connect, the external 1K resistance of IRQ is connected with microcontroller external interrupt pin, all can trigger controller after one frame data of often transmission or reception External interrupt.

The GP3SF1513F1-S that GPS receiver module selects Shenzhen interstellar communication development in science and technology Co., Ltd to produce (is used The exploitation of SiRF single-chips is completed), it has the characteristics that compact, powerful, power consumption is extremely low and performance is stablized.It can connect Receive 20 GPS satellite informations, antenna only need to can receive signal close to vehicle window (receiving sensitivity reaches -159dBm).Controller Control to GPS mainly receives GPS positioning information by serial port.

3G communication modules select the ZTE MU301 modules of Zhongxing Telcom Co Ltd, it supports TD-SCDMA/HSDPA and GPRS/ EDGE network automatically switches (downstream rate is 2.8Mbps, upper behavior 384Kbps during TD-SCDMA/HSDPA patterns).Controller By serial ports its AT order can be called to complete information transmit-receive.

Camera has selected the Vimicro camera with USB interface.This camera is cheap, and imaging effect is good, body Preferable cost performance is revealed.At the same time, multiple peripheral interfaces have also been reserved on circuit board, so as to expanded function.

The circuit diagram of power module is as shown in Figure 2.Externally input 12V DC power supply is converted into by power module Unite operating voltage needed for each module.Voltage needed for controller DSP is 3.3V and 5V.Voltage needed for extensible processor FPGA is 1.2V, 2.5V and 3.3V.The design is using the D/C power converter MC34063A of MOTOROLA companies by 12V DC voltage conversion Into 5V DC voltages, the power supply changeover device TPS75003 of TeXas Iastrument8 companies is selected to be converted into 5V vertical compression power supplys 1.2V, 2.5V and 3.3v DC voltage.

As shown in figure 3, the module uses LCD12864 display modules, its supply voltage is the circuit diagram of display module 4.5V~5V, operating current 3mA, is internally integrated character library.

The vehicle-mounted user terminal can gather video information, can carry out continuous real-time video monitoring if desired, can also lead to Triggering is crossed to start video monitoring (key monitoring region that such as vehicle set by gps satellite, meet that user alarms, unknown situation is looked into Ask etc.).Remote monitoring center can implement monitoring vehicle certain and shake control function, such as the car body control such as igniting limitation, oil circuit break-make System.

The scope of protection of the utility model is not limited to the above embodiments, it is clear that those skilled in the art can be right The present invention carries out various changes and deformation without departing from scope and spirit of the present invention.If these changes and deformation belong to this reality In the range of new claim and its equivalent technologies, then the intention of the utility model also comprising these changes and deforms It is interior.

Claims (5)

1. a kind of vehicle-mounted user terminal, the vehicle-mounted user terminal is by power module, controller, extensible processor, camera, GPS Receiving module, 3G communication modules, display module, expansion connection module and wireless communication module composition, it is characterised in that：

The controller, using CXD3142 digital signal processing chips, the controller respectively with power module, camera, GPS receiver module, 3G communication modules, display module, extensible processor and wireless communication module connection；

The power module uses D/C power converter MC34063A and power supply changeover device chip TPS75003；

The extensible processor uses Spartan3E Series FPGA chips XC3S250E-PQ208.4Cm；

The expansion connection module includes serial communication interface and USB interface, and wherein serial communication interface uses SP3232E cores Piece, USB interface use ADV7125 chips.

2. vehicle-mounted user terminal according to claim 1, it is characterised in that：

The GPS receiver module uses GP3SF1513F1-S chips, and the GPS receiver module passes through GPS positioning information serial Mouth is sent to controller.

3. vehicle-mounted user terminal according to claim 1, it is characterised in that：

The 3G communication modules select ZTE MU301 modules, which supports TD-SCDMA/H SDPA and GPRS/EDGE Network automatically switches, which is connected by serial port with controller, completes information transmit-receive.

4. vehicle-mounted user terminal according to claim 1, it is characterised in that：

The display module uses LCD12864 display modules.

5. vehicle-mounted user terminal according to claim 1, it is characterised in that：

The wireless communication module uses nRF24L01 radio frequency chips.