BOTDA1000 · 分布式光纤温度应变分析仪
BOTDA双端接入，适合可形成回路的沿线应变与温度监测。
BOTDA1000布里渊光时域分析仪
BOTDA1000 Brillouin Optical Time-Domain Analyzer
产品原理与应用 Principle and applications
基于受激布里渊散射，利用沿光纤相向传播的泵浦光与探测光测量布里渊增益谱，并依据时域定位获得沿线温度或轴向应变分布。双端光路需要形成泵浦与探测光的接入路径，可通过回路光纤返回设备端。
Uses stimulated Brillouin scattering between counter-propagating pump and probe light to measure the Brillouin gain spectrum. Time-domain localization provides temperature or axial-strain profiles. The two-ended optical path requires pump/probe access, which may be routed back to the instrument using a fiber loop.
单通道标准60 km，长距离配置最高120 km；1–4通道。用于长输油气管道、海底光电复合缆、架空线、大坝与桥梁等连续状态监测。标准通信单模光纤可作为传感介质，具体纤型需校准。
Standard range is 60 km per channel, with up to 120 km in a long-range configuration and 1–4 channels. Applications include pipelines, submarine composite cables, overhead lines, dams and bridges. Standard single-mode telecom fiber can serve as the sensor and must be calibrated for its fiber type.
布里渊频移同时受温度与轴向应变影响。测量应变时需要温度补偿，测量温度时需要消除或约束应变影响；单条频移曲线不能独立分离两个未知量。
Brillouin frequency shift responds to both temperature and axial strain. Strain measurement requires temperature compensation; temperature measurement requires strain isolation or correction. One frequency-shift trace cannot independently determine both unknown quantities.
采用光学传感与传输，抗电磁干扰；支持连续沿线测量、事件定位、光纤故障监测及长期状态管理。危险区域的光缆与整套系统按相应使用条件选配。
Optical sensing and transmission resist EMI and support continuous profiles, event location, fiber-fault monitoring and long-term condition management. Select the cable and complete system for the applicable hazardous-area conditions.
量程、空间分辨率、平均时间与测量精度存在配置关联，长距离与最高分辨率不一定同时达到。温度量程取决于传感光纤及护套；应变需通过可靠机械耦合传递至光纤。
Range, spatial resolution, averaging time and accuracy are configuration-dependent and not necessarily achieved simultaneously. Temperature range depends on the fiber and jacket; strain requires reliable mechanical transfer into the fiber.
技术参数 Technical specifications
| 参数 / Parameter | 规格 / Specification |
|---|---|
| 光纤类型 / Fiber Type | 单模光纤 / Single-mode fiber |
| 监测距离 / Sensing Range | 每个通道监测距离 60 km（长距离为 120 km） 60 km per channel (up to 120 km for long-distance configuration) |
| 通道数 / Number of Channels | 1~4 通道 / 1 to 4 channels |
| 光缆接口类型 / Optical Connector Type | 单模 FC/APC（SC/APC 可选） Single-mode FC/APC (SC/APC optional) |
| 测量时间 / Measurement Time | ≤60 s（对应量程、分辨率及平均设置） ≤60 s under the specified range, resolution and averaging settings |
| 温度测量范围 / Temperature Measurement Range | -60°C ~ +300°C（取决于光纤类型） -60°C to +300°C (depending on fiber type) |
| 温度测量精度 / Temperature Accuracy | ±1°C（沿线，按对应量程与测试配置） ±1°C (along the fiber under the specified range and test configuration) |
| 温度分辨率 / Temperature Resolution | 优于 0.1°C / Better than 0.1°C |
| 应变测量范围 / Strain Measurement Range | -10000 με ~ +10000 με |
| 应变测量精度 / Strain Accuracy | ±20 με（沿线，按对应量程与测试配置） ±20 με (along the fiber under the specified range and test configuration) |
| 应变分辨率 / Strain Resolution | 2 με |
| 采样间隔 / Sampling Interval | < 1 m |
| 空间分辨率 / Spatial resolution | 0.5 ~ 5 m |
| 系统定位误差 / System Positioning Error | ≤ 1 m |
| 主机工作环境 / Operating Environment | 温度范围：-10°C ~ +50°C，相对湿度：<95%RH（无凝露） Temperature: -10°C to +50°C; Relative humidity: <95%RH (non-condensing) |
| 主机通讯接口 / Communication Interfaces | 以太网 (TCP/IP)、RS 232/RS485、USB Ethernet (TCP/IP), RS-232/RS485, USB |
| 电源 / Power Supply | AC220V ~ AC240V, 50Hz |
| 数据存储 / Data Storage | 500G 硬盘（可扩展） 500 GB hard disk (expandable) |
| 配套操作系统 / Supported Operating System | 原平台支持Windows 2000及以上；实际兼容版本与驱动按交付软件确认 Original platform specifies Windows 2000 or later; confirm actual OS and driver compatibility for the supplied software |
| 尺寸 / Dimensions | 483 × 447 × 133 mm（19 寸标准机柜机架式安装） 483 × 447 × 133 mm (19-inch standard rack-mount installation) |
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