论文部分内容阅读
现代海洋仪器正向连续自动记录和自动化方面发展着。目前,电测式的海洋温度测量仪器,大都是由测温传感器、探测电缆和自动记录的二次仪表组成。常用的测温传感器,主要有金属电阻式的、半导体热敏电阻式的和热电偶式的。热电偶式传感器具有很好的复制性和稳定性,采用薄膜式热电偶也可以得到很小的热惯性。其缺点是灵敏度较低,在海水温度变化范围内只有1毫伏左右;同时,探测电缆必须采用和热电偶一样的材料制造;此外,在二次仪表中还必须给热电偶的冷端配上足够准确的冷端补偿器。由于这些原因,它在海洋温度测量方面的应用就受到了限制。
Modern marine instruments are being developed for continuous automatic recording and automation. At present, most of the measuring instruments for measuring oceanic temperature are composed of a temperature sensor, a probing cable and an automatically recorded secondary instrument. Commonly used temperature sensor, mainly metal resistance, semiconductor thermistor and thermocouple type. Thermocouple sensors have good reproducibility and stability, with thin-film thermocouples can also get a small thermal inertia. The disadvantage is the lower sensitivity, seawater temperature range of only 1 millivolt; the same time, the detection cable must be made of the same material and thermocouple; In addition, the secondary instrument must also be coupled to the cold end of the thermocouple Accurate cold junction compensator. For these reasons, its use in ocean temperature measurement is limited.