冻雨和冰检测器 / 0871LH1
冰冻预警
保护路面、输电线路、飞机、航行器和风力发电机等设备
保护路面、输电线路、飞机、航行器和风力发电机等设备
概览
0871LH1 是一款监测冰冻现象的传感器，可有效防止电力和通信线路的损坏，预警道路危险，预警风力机叶片或飞机机翼的冰冻。
优势与特点
- 可用于帮助防止损毁电力线，以及预警道路结冰、飞机机翼结冰和风力电机翼片结冰等危险
- 当冰累积到0.5 mm厚时，自己自动除霜
图像
技术说明
0871LH1 采用共振频率来监测冰冻现象。主体为镍合金杆，自然共振频率为40kHz。杆部如果出现冻冰，附加的质量会导致共振频率降低。当频率降低到130 Hz (或冰层达到 0.02英寸厚)时，内部加热器会自动加热为传感器除冰。
风能应用：1、0871LH1 用来监测风力涡轮机叶片上的结冰现象，避免冰块甩出造成的危险；2、冰块会导致叶片、轴承和齿轮箱的负载失去平衡；3、降低涡轮机的输出功率。
产品规格
| Measurement Description | Ice detected/no ice detected |
| Range | State dependent (ICE = 1, NO ICE = 0) |
| Set Point | Ice signal activates when probe ice thickness exceeds 0.5 mm ±0.13 mm (0.02 in. ±0.006 in.) |
| Output Format | RS-422 output operates at 9600 bps. |
| Operating Temperature Range | -55° to +71°C |
| Storage Temperature Range | -65° to +90°C |
| Random Vibration | 7.9 grms (DO-160C, Category E) |
| Shock | DO-160C |
| Operating Voltage | 18 to 29.5 Vdc |
| Base Diameter | 7.32 cm (2.88 in.) |
| Base Height | 3.81 cm (1.5 in.) |
| Strut Diameter | 3.10 cm (1.22 in.) |
| Strut Height | 2.54 cm (1.0 in.) |
| Plate Dimensions | 7.37 x 7.37 x 0.22 cm (2.9 x 2.9 x 0.085 in.) |
| Rod Diameter | 0.64 cm (0.25 in.) |
| Rod Height | 2.54 cm (1.0 in.) |
| Weight | 0.3 kg (0.7 lb) |
Power Draw @ 24 Vdc |
|
| Sensing Mode | 5 W (maximum) |
| Deicing Mode | 27 W (maximum) |
Operating Modes |
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| Sensing | Operating with no ice or with probe ice thickness below the set point |
| Deicing | Operating with probe ice thickness exceeding the set point |
Discrete Output Signals |
|
| Ice Signal (No Icing) | Open |
| Ice Signal (Icing Detected) | Ground |
| Status Signal (Operating Correctly) | Ground |
| Status Signal (Failure Detected) | Open |
RS-422 Output Signals |
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| Ice Signal |
|
| Fail State |
|
Built-in Test (BIT) |
|
| Commanded | Performed at initial power-up. If a failure is detected and verified, the ice detector stops detecting and annunciating icing conditions, the heaters are disabled, and a failure is annunciated. |
| Continuous | Hardware and software BIT verifies that internal electronics are functioning properly. |
Electrical Connectors |
|
| Mechanical | MS27474T10B199PN |
| Mating | MS27474T10B199SN |
相关技术文档
常见问题解答
0871LH1: 3
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This depends on the climate conditions. The maximum heating up time is 25 s.
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The sensor determines if there is an ICE or NO ICE condition. If the sensor is covered in ice, it reports an ICE condition and turns on the heater to defrost itself.