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Simultaneous in-situ sea water salinity and temperature measuring method and device

A detection device and seawater salt technology, which is applied to the simultaneous online detection of seawater salinity and temperature, and the field of seawater salinity measurement. It can solve the problems that it is impossible to give temperature parameters at the same time, the probe is large in size, and it is easy to introduce errors, etc., so that it is easy to carry Good installation and measurement stability and low signal transmission loss

Inactive Publication Date: 2002-10-16
TSINGHUA UNIV
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Problems solved by technology

Its disadvantage is that it adopts a transmissive structure, and the probe is large in size, and the probe part of this sensor has a photoelectric device PSD, which is likely to cause unsafe factors underwater; in the process of long-distance signal transmission, the light of the signal- The three conversions of electricity-optical-electricity are cumbersome and easy to introduce errors; the resolution of the measurement is low
[0005] It is impossible for the above studies to give the temperature parameter in the test process at the same time, but this parameter is the most critical parameter that directly affects the salinity measurement

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  • Simultaneous in-situ sea water salinity and temperature measuring method and device

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Embodiment Construction

[0028] The simultaneous on-line detection method and device for seawater salinity and temperature proposed by the present invention are further described in conjunction with the accompanying drawings for its measurement principle and the structure of the measurement device.

[0029] figure 1 It is a schematic diagram of the overall structure and measurement principle of the device. When the system works, first turn on the power supply 10, start the computer 21, and the light beam sent by the LED light source 11 with a pigtailed fiber in a wide spectral range passes through the optical fiber cable and the collimator 12 (fixed) with low loss, low noise and seawater corrosion resistance. On the sensor frame) to the sensor probe, the optical fiber and the collimator are connected through a standard optical fiber connector; the light source adopts a light-emitting diode with a central wavelength of 880nm and a spectral half-width of at least 90nm. The light successively passes thr...

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Abstract

The present invention belongs to the field of optical fiber sensing and sea water measuring technology. The in-situ simultaneous sea water salinity and temperature detecting device includes optical source, transmission fiber, power supply, CCD, collimating lens with tail fiber, glass window, measuring water trough, sensor probe comprising temperature sensing reflecting unit and receiving fiber array, image collecting and processing module and computer with software and calibrating data. The temperature sensing reflecting unit incldues absorbing semiconductor chip, right angle prism and heat conducting material. The salinity. measurement is completed by detecting the position change of loight spot in CCD photosensitive surface caused by the refractive index change owing to different salinity; while the temperature is measured by detecting the light strength change in semiconducotr material caused by temperature.

Description

technical field [0001] The invention relates to a method and device for measuring seawater salinity, in particular to a method and device for simultaneous online detection of seawater salinity and temperature, belonging to the technical fields of optical fiber sensing and seawater measurement. technical background [0002] The development and utilization of marine resources has promoted the continuous development of marine technology, especially in recent years, the monitoring of marine environment and the protection and utilization of water resources that have been widely concerned at home and abroad have led more and more researchers to explore the detection technology of marine parameters. . Salinity and temperature are two important parameters of seawater. As we all know, the measurement of salinity is seriously affected by temperature, and its influence can be measured by the change of seawater refractive index related to salinity. Some data show that: in Under the con...

Claims

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Application Information

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IPC IPC(8): G01N21/41G01N35/00
Inventor 赵勇廖延彪
Owner TSINGHUA UNIV
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