Study on the Flow Field Calibration Technology of Electromagnetic Current Meter Water Tank
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摘要: 采用实验水槽和水槽天车,设计校准试验方法,开展多组海流测量试验,对电磁海流计计量性能进行技术分析。结果显示,流速最大示值误差绝对值是1 cm/s,流向最大示值误差绝对值为2°。实验水槽流场校准技术为电磁海流计海流参数量值传递提供了一种新的有效途径。Abstract: In this paper, an experimental water tank and a tank crane are used to design a calibration test method. By carrying out multiple sets of ocean current measurement experiments, the measurement performance of the electromagnetic ocean current meter is technically analyzed. The results show that the absolute value of the maximum indication error of the flow velocity is 1 cm/s, and the absolute value of the maximum indication error of the flow direction is 2°. The tank flow field calibration technology provides a new and effective way for the ocean current parameter value transfer of electromagnetic current meters.
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Key words:
- electromagnetic current meter /
- calibration technology /
- water tank
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表 1 参试仪器信息
Table 1. Information of test instruments
标准海流计
(Nortek威龙海流计)被校海流计
(ALEC电磁海流计)流速 测量范围 0~4 m/s 0~2 m/s 准确度 ±0.5%V±1 mm/s ±10 mm/s 流向 测量范围 0~360° 0~360° 准确度 ±2° ±4° 表 2 1#海流计流速试验数据(部分)
Table 2. Test data of 1# current meter (part)
单位:cm/s 时间 标准海流计
(威龙海流计)被校海流计
(电磁海流计)示值误差 16:58:23 10.4 10.2 −0.2 17:03:54 31.0 31.3 0.3 17:07:15 52 51.5 −0.5 17:10:09 104 103.5 −0.5 17:13:01 140 139.5 −0.5 17:15:48 199 200 1 表 3 2#海流计流速试验数据(部分)
Table 3. Test data of 2# current meter (part)
单位:cm/s 时间 标准海流计
(威龙海流计)被校海流计
(电磁海流计)示值误差 16:58:23 10.4 10.1 −0.3 17:03:54 31.0 31.5 0.5 17:07:15 52 52.5 0.5 17:10:09 104 104.0 0 17:13:01 140 134.5 0.5 17:15:48 199 200 1 表 4 1#海流计流向试验数据(部分)
Table 4. Flow direction test data of 1# current meter (part)
单位:° 时间 标准海流计
(威龙海流计)被校海流计
(电磁海流计)示值误差 16:58:23 181 179 −2 17:03:54 180 178 −2 17:07:15 180 178 −2 17:10:09 181 179 −2 17:13:01 181 182 1 17:15:48 180 179 −1 表 5 2#海流计流向试验数据(部分)
Table 5. Flow direction test data of 2# current meter (part)
单位:° 时间 标准海流计
(威龙海流计)被校海流计
(电磁海流计)示值误差 16:58:23 181 180 −1 17:03:54 180 179 −1 17:07:15 180 180 0 17:10:09 181 182 1 17:13:01 181 182 1 17:15:48 180 179 −1 -
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