一、概述 SG-821汽车行驶记录仪检定装置，是山东赛格测试仪器有限公司自主开发研制的以非接触速度传感器为测速单元的智能化测试仪器，系统采用32位微处理器配合实时多任务操作系统，用以对各种汽车行驶记录仪进行模拟测试和实车测试，仪器符合GB/T 19056-2012《汽车行驶记录仪》以及JJG(鲁）57-2007《汽车行驶记录仪》检定规程 ，满足GB/T21861-2014的测试要求，是计量技术部门、公安交通检测机构理想的检测设备。系统采用大屏幕液晶显示，汉字提示，实时显示行驶速度、距离、时间等多项测试数据，清晰直观。 系统还标配RS232接口及SD存储卡接口，测试数据（速度、距离、时间等）以文件形式存储在SD卡上，用户利用系统机或笔记本电脑可以方便地对该数据进行二次分析处理。本系统速度最小分辨率为0.01 km/h。二、 主要测试项目l 车速试验：试验距离、试验时间、平均车速、最低车速、最高车速。八种测试模式可选：两种开始条件，四种结束条件灵活组合多种测试模式。l 道路试验：连续记录车辆行驶过程中的速度、行驶距离、时间等参数，用于汽车行驶记录仪进行速度误差和里程误差的实车道路测试。l 模拟测试：输出多种模拟速度信号，对汽车行驶记录仪进行速度误差的模拟测试。l 定位测试：对汽车行驶记录仪进行经纬度定位测试、时间校准。三、技术性能指标l 电 源：内置：DC9.6v ；外接：DC12V / 5A l 外形尺寸：210 X 150 X 60 mm（SG-821）l 重 量：2.0 kg(SG-821 包含内置电池)l 使用温度：-20℃～45℃l RS232接口：波特率9600，8位数据位，1位停止位，无校验l 测量范围与精度：
| 序号 | 项 目 | 测 量 范 围 | 分 辨 率 | 精 度 |
| 1 | 速度 | 0～300.0 km/h | 0.01 km/h | 0.5% |
| 2 | 距离 | 0～999999.999 m | 1 mm | 0.5% |
| 3 | 时间 | 0～99999.999 s | 1 ms | 0.3% |
| 4 | 输出频率 | 10～14222.22 Hz | 1% |
Shandong Saige testing Instruments Co., Ltd., mainly engaged in the design, production of electronic testing and analysis instruments and optical sensing systems and microcomputer measurement and control systems high-tech companies, The instruments produced have been serialized, and the production license of measuring instruments issued by the State Technical Supervision Bureau has been obtained.
The company has advanced and complete experimental equipment and high quality engineers and technicians, and the personnel structure is reasonable. There are computer software and hardware, automatic control, instrumentation, automotive machinery design professionals, to ensure the advanced nature and reliability of the product. Our company also has a technical team of installation, debugging and maintenance through practical training, the customer after-sales service has a good guarantee.
After many years of operation, the company has established a good quality image in the domestic automobile testing industry. It has provided a single or complete set of testing instruments for transportation management, agricultural machinery, public security, technical supervision departments and colleges and universities. And has obtained the general user consistent high praise.
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