车载硬盘录像机属于传统嵌入式硬盘录像机的细分市场，它是随着数字视音频编码技术在车辆上应用而发展起来的一个新兴专用产品。车载硬盘录像机结合了数字视音频编***、恶劣环境大容量数据硬盘存储、汽车电子、无线视频网传、GPS卫星定位等先进技术，实现对客运行业、特种车辆行业以及其他相关领域的视音频监控。
VCRS belongs to the market segment of traditional embedded VCRS, which is a new special product developed with the application of digital video and audio coding technology in vehicles. Vehicle-mounted hard disk video recorder is a combination of digital audio encoding * * *, bad environment, large capacity hard disk data storage, automotive electronics, wireless video network transmission, advanced technology such as GPS satellite positioning, implementation of passenger transport industry, special vehicle industry and other related audio monitoring.
车载DVR基础
近年来，随着机器视觉技术的发展，国内部分厂家的嵌入式硬盘录像机已经支持部分智能分析功能，并有智能分析功能产品在车载硬盘录像机上应用。目前，已有车载硬盘录像机加入了人脸检测和车牌识别智能模块，可通过智能模块进行分析处理人脸信息和车牌信息。未来还将根据各行业客户的需求增加其他智能模块。
另外，车载硬盘录像机增加GPS定位模块可实时了解车辆所在位置经纬度、高度、速度、方向等信息;车载硬盘录像机的GPS卫星定位功能需与无线传输相结合，可提供车辆调度系统车辆位置相关信息。车载硬盘录像机如能通过本地显示液晶屏进行GPS导航，则可增加车载硬盘录像机产品的附加值。
Vehicle-mounted
DVR foundation
In recent years, with the development of machine vision technology, embedded hard disk video recorder has supported part of some domestic manufacturer intelligent analysis function, and intelligent analysis function in the car on the hard disk video recorder application products. At present, an intelligent module for face detection and license plate recognition has been added into the on-board hard disk video recorder, which can analyze and process face information and license plate information. In the future, other intelligent modules will be added according to the needs of customers in various industries.
In addition, the on-board hard disk video recorder can add GPS positioning module to understand the information of longitude, latitude, altitude, speed and direction of the vehicle's position in real time. The GPS satellite positioning function of the on-board hard disk video recorder should be combined with wireless transmission to provide vehicle location information of the vehicle scheduling system. If the VCRS can conduct GPS navigation through local LCD, it can increase the added value of VCRS products.
车载DVR技术
一、必备条件
车载硬盘录像机的出现解决了相关部门的困惑。车载数字硬盘录像机是安装于移动车辆上，集数字录像、监控、娱乐、广告等功能于一体的专用嵌入式数字硬盘录像机。它必须满足的条件有：能使用车载电源、小型化、防震、能记录行车信息和能实现增值。这里对以上几个必要条件作一下简单阐述：
1、电源
车载DVR一直工作在车辆行驶的环境中，就必须要防震、防尘、防潮。同时，设备对输入电压适应范围大，因为在车辆行驶的过程中，会有刹车、爬坡、点火及车辆电气设备的老化等，这都会使车辆的输出电压产生不同幅度的波动，因此车载设备本身必须具有宽电压输入能力来适应电压变化，进行抗电磁兼容设计，同时在工艺上需要进行防震和防尘处理。
2、高度集成小型化
车载DVR不是单纯的对图像进行录像，必须有丰富的功能来满足现代车辆监控的要求，能对各种情况做出应对。一般的嵌入式数字硬盘录像机长宽都差不多在400mm，由于车辆上的空间有限，机箱太大不便于安装比如座位下面就安装不了，因而机器的小型化就成了一个必须满足的要求，为了便于安装如座位下面，现一般要求长宽不超过300×200mm。
3、防震
由于车况、路况的不同，防震、特别是对硬盘的防震处理就成了对车载数字硬盘录像机的最基本要求。在车载数字硬盘录像机中最容易损坏的部件是硬盘，因此一定要解决好车载的避震问题，我们采用专利的防震结构，具有硬盘悬挂避震和机箱悬挂避震的双避震设计。不同于市场上采用弹簧、橡胶垫作为防震材料的结构，虽然在垂直受力方向上能起到一定的防震作用，但实际上在行车状态下特别是在恶劣的路况条件下其振动方向是不规则的，长时间使用必然会导致设备发生故障。
4、行车信息记录功能
行车信息记录功能分为两部分。其一，行车音视频信息记录功能。其二，行车的车速、转向、刹车等信息记录功能。其中行车音视频信息记录功能是一般的车载数字硬盘录像都能满足的，面对车速等由传感器传出的信息进行记录黑匣子功能是现阶段较为先进的车载数字硬盘录像机才具备的功能，可准确记录汽车的行驶状态，如：左转、右转、刹车、倒车、车速以及车辆行驶的其它信息，并存储的信息可通过标准接口实现数据输出。通过系统分析软件，可以有效地对车辆进行合理的调度管理，提高行车安全，减少车辆违规肇事。
5、实现增值媒体播放功能
车载数字硬盘录像机在实现音、视频信息记录功能的同时，能否提供新的增值服务，比如能否编制、插播广告、娱乐节目等。这又是广大客户对车载数字硬盘录像机提出的新要求，并也成了车载数字硬盘录像机产品是否先进的又一标准。
Vehicle-mounted DVR technology
1. Necessary conditions
The advent of VCRS has solved the confusion of the relevant departments. Vehicle-mounted digital hard disk video recorder (DVR) is a special embedded digital hard disk video recorder installed on mobile vehicles, which integrates digital video recording, monitoring, entertainment, advertising and other functions. It must meet the following conditions: power supply, miniaturization, shockproof, record driving information and value added. Here is a brief description of the above necessary conditions:
1, the power supply
Vehicle DVR has been working in the vehicle driving environment, so it must be shock-proof, dustproof and moisture-proof. At the same time, the equipment to adapt to the large range of input voltage, because in the process of vehicle driving, there will be a brake, climbing, ignition and vehicle electrical equipment aging, etc., this will make the output voltage of the vehicle produces different amplitude fluctuations, therefore on-board equipment itself must have ability to adapt to wide voltage input voltage change, resistance to electromagnetic compatibility design, at the same time on craft to shock and dustproof.
2. Highly integrated and miniaturized
Vehicle-mounted DVR is not only for video recording. It must have rich functions to meet the requirements of modern vehicle monitoring and respond to various situations. General embedded digital hard disk video recorder aspect is about the same in 400 mm, due to the limited space on the vehicle, chassis is too big for ease of installation such as seat can't install below, therefore the miniaturization of machine has become a must meet the requirements, to facilitate the installation, such as under the seat, the general requirements width less than 300 x 200 mm.
3, shockproof
Due to the different car conditions and road conditions, the shock prevention, especially the shock treatment of the hard disk, has become the most basic requirement for the on-board digital hard disk video recorder. In on-board digital hard disk video recorder is the most easy to damage the parts in the hard disk, so be sure to solve the problem of good vehicle suspension, we adopt patent shockproof structure, suspension shock absorber with hard disk and the design of the double suspension chassis suspension shock absorber. Using springs, rubber mat is different from the market as the structure of the vibration absorber, although in the vertical stress direction can have certain shock effect, but actually in the driving state, especially in bad road conditions under the condition of the vibration direction is irregular, the long time use will inevitably lead to equipment failure.
4. Vehicle information recording function
The driving information recording function is divided into two parts. First, the vehicle audio and video information recording function. Second, driving speed, steering, braking and other information recording functions. With the audio and video information of driving vehicle digital hard disk video recording function is generally can meet, in the face of the speed by the information from the sensors such as records of black box function is at present advanced automotive digital hard disk video recorder didn't have the function, can accurately record the car driving state, such as: turn left, turn right, brake, reversing, speed and other vehicle traffic information, and store the information can be through a standard interface for data output. Through the system analysis software, the vehicle can be effectively scheduled and managed, the vehicle safety can be improved, and the vehicle violation can be reduced.
5. Realize value-added media playback function
While realizing the function of voice and video information recording, the on-board digital hard disk video recorder can provide new value-added services, such as whether to compile, insert advertisements and entertainment programs. This is a large number of customers on the vehicle digital hard disk VCR new requirements, and has become the vehicle digital hard disk VCR product advanced standards.
二、车载DVR的功能特性
1、车载电源保证在宽电压DC8V-32V范围内稳定工作，具有DC12V输出供给摄像机工作
2、实现图像无线远程传输，智能远程控制
3、录像回放清晰度最高可达DVD画质，保证全实时，可以音视频同步记录
4、节目段锁定功能，保证录像时不被覆盖
5、公交车语音报站功能可选
6、可以记录车速、转向、刹车等信息选项，可以输入记录行车路线、车牌号码
7、按时间、录像段号检索功能
8、光碟内容可直接拷贝到硬盘，硬盘内容也可直接、拷贝到光碟，方便快捷
9、主板、单板设计，机箱防震处理，保证整机护震效果
10、特殊的活动硬盘装置，无需任何工具，便可方便抽取、安装硬盘。杜绝了以往使用电脑硬盘出现的发热、硬盘盒松动而产生的故障IDE线和电源需通过硬盘盒转接
11、支持两个硬盘，硬盘容量不受限制
12、体积小，携带方便，有利于防震。
车载DVR应用导向
车载硬盘录像机根据不同行业应用要求，可进行多种功能定制。
1、客运行业定制功能分析
客运行业对车载硬盘录像机的需求除简单的车载视频监控功能外，还需要无线网络视频监控(以了解车内外实时情况)、GPS卫星定位、车辆调度、车辆语音报站、车辆行驶信息纪录、多媒体娱乐广告播放等功能。
2、警用车辆定制功能分析
公安行业对车载硬盘录像机的主要功能有：视频监控、无线网传、云台控制等。交警更关注如何进行违章取证，主要需求有：车牌识别、黑名单比对等。城管和运管等行业也有与交警类似的需求。
3、金融行业定制功能分析
金融行业运钞车辆要求车载硬盘录像机稳定可靠工作，并在发生突发事件时能即时地将视频和报警信息上传到管理中心平台，并可与监控中心平台进行互动。
4、汽车电子定制功能
车载硬盘录像机还应和汽车电子相关功能进行结合，例如：汽车行驶数据采集与上传普遍采用CAN总线技术，车载硬盘录像机也应具备CAN总线接入与分析处理功能，通过硬盘纪录车辆行驶的相关信息，并对重要数据进行分析和处理。
5、其他交通工具车载硬盘录像机应用
轨道交通、船舶、航空等行业也有实时监控的需求，这些行业除了需增加硬盘减震加固处理外，还需注意此类项目所使用的电源和普通汽车电源的差别，例如：列车提供车载设备的电源大多为DC48V或DC110V，而普通车载电源为DC12V或DC24V。
Ii. Function characteristics of vehicle DVR
1. The on-board power supply ensures stable operation within the range of wide voltage dc8v-32v, with DC12V output for the camera
2. Realize wireless remote transmission of images and intelligent remote control
3. The video playback resolution can reach the highest quality of DVD, ensure full real-time, and record audio and video synchronously
4. Program segment locking function ensures that video recording is not covered
5. Bus voice station function is optional
6. You can record the speed, steering, braking and other information options, and you can enter the driving route and license plate number
7. Search by time and video segment number
8. The contents of the CD can be directly copied to the hard disk, and the contents of the hard disk can also be directly copied to the CD, which is convenient and fast
9. Design the main board and single board, and handle the case against vibration, so as to ensure the shock protection effect of the whole machine
10. The special movable hard disk device can be easily extracted and installed without any tools. Avoid the previous use of computer hard disk heating, hard disk box loose caused by the failure of IDE line and power needs to be transferred through the hard disk box
11. Support two hard disks with unlimited capacity
12. Small size, easy to carry and good shock resistance.
Vehicle-mounted DVR application guidance
According to the application requirements of different industries, the on-board hard disk video recorder can be customized with various functions.
1. Customized function analysis of the passenger transport industry
Passenger transportation industry demand for car DVR besides simple on-board video monitoring function, also need a wireless network video monitoring (to learn in a real-time condition inside and out), GPS satellite positioning, vehicle scheduling, vehicle record voice stops, the vehicle information, multimedia entertainment advertising, and other functions.
2. Customized function analysis of police vehicles
The main functions of the public security industry are video monitoring, wireless transmission and cloud platform control. Traffic police pay more attention to how to collect illegal license, the main requirements are: license plate recognition, blacklist comparison and so on. Industries such as urban management and transportation have similar needs to traffic police.
3. Customized function analysis in the financial industry
Financial industry car vehicle car hard disk video recorder is stable and reliable work, and in the case of emergency can instantly upload video and alarm information to management center platform, and can interact with the monitoring center platform.
4. Automotive electronic customization function
Vehicle-mounted hard disk video recorder and combination with automobile electronic related functions, such as: the car is generally used to upload data acquisition and CAN bus technology, automotive hard disk video recorder should also have a CAN bus access and analysis processing functions, through hard disk record vehicle traffic information, and analyze the important data and processing.
5. Other vehicle on-board hard disk video recorder application
Rail transport, shipbuilding, aviation and other industries have the demand of real-time monitoring, these industries in addition to the hard disk may be increased to shock absorption reinforcement, still need to pay attention to such projects used by the difference of power supply and ordinary car power supply, for example: provide on-board equipment of the power train mostly DC48V or DC110V, and ordinary car for DC12V or DC24V power supply.
