CN2816801Y

CN2816801Y - Underwater dissolved oxygen measuring sensor

Info

Publication number: CN2816801Y
Application number: CN 200520086394
Authority: CN
Inventors: 荆淼; 兰举生; 曹为; 王进祖; 李文龙; 鲍建; 夏达英; 徐之海; 王文举; 兰鲁光
Original assignee: First Institute of Oceanography SOA; Anhui Institute of Optics and Fine Mechanics of CAS
Current assignee: First Institute of Oceanography SOA; Anhui Institute of Optics and Fine Mechanics of CAS
Priority date: 2005-08-17
Filing date: 2005-08-17
Publication date: 2006-09-13
Anticipated expiration: 2015-08-17

Abstract

The utility model relates to an underwater dissolved oxygen measuring sensor. The utility model comprises an oxygen sensing diaphragm, a fluorescent measuring probe sealed in a housing, and a light trap which is connected with the lower part of the fluorescent measuring probe, wherein the fluorescent measuring probe is composed of a light source, a lens assembly which is axially assembled, a light filter, and a circuit board for fixing a photoelectric detector. The utility model is characterized in that the measuring sensor also comprises a temperature sensor arranged above a connecting seat; the light trap is formed by that a connecting seat at the upper part, a plurality of shading caps and pad columns which are alternately overlapped under the connecting seat, and an extinctive cavity at the lower part are sequentially connected in series through a long bolt. The axle wire of the light source and the normal of the circuit board are fixed to the circuit board in a small angle of 8 DEG to 12 DEG. The utility model with the structure not only has small volume and light weight, but also can realize all-day and all-weather monitoring on site. The utility model is suitable for measuring in deeper ocean and in adverse sea circumstances.

Description

Dissolved oxygen sensing sensor under water

Technical field

The utility model relates to a kind of sensor that is used on the on-the-spot optical measuring device that detects dissolved oxygen DO in the water body in waters---dissolved oxygen sensing sensor under water.

Background technology

Measure the existing multiple corresponding survey sensor of dissolved oxygen DO in the water body, obviously survey sensor is the key device of dissolved oxygen measuring device.Anionic polystyrene exchange membrane electrochemistry oxygen sensor etc. all is based on the lambda sensor of electrode type in recent years, but because marking current is slow from producing the process that arrives balance, has limited measuring speed; And the ventilated membrane of electrode is aging easily, and it need rely on the redox reaction of electrode itself to measure the concentration of oxygen, need to consume the oxygen of sample in the mensuration process, so the serious constraint that its measuring accuracy and response time all are subjected to coefficient of diffusion is the major defect of these class methods.

The optical fiber oxygen sensor based on palycyclic aromatic fluorescent quenching technology and optical fiber technology of Chu Xianing in recent years, be to be made the oxygen sensing film by the fluorescent reagent of oxygen molecule quencher and be coupled in optical fiber end to adopt light emitting diode be the fluorescence excitation light source with producible, combine with the photodiode detection system, obtained can be used for the on-the-spot optical fiber oxygen sensor that detects dissolved oxygen DO in the water body.But sensor needs to carry out light transmission with the glimmering fibre bundle of expensive quartz.Again at the scene during actual measurement, its device more various (have controller waterborne with underwater sensor and be connected above water and the optical transmission cable of underwater portion), and need operating personnel to operate when measuring, can not round-the-clock, the round-the-clock monitoring, be not suitable for the ocean than working in deep layer measurement and severe sea condition (high sea) environment, therefore, it uses the restriction that is subjected to a certain degree widely.

Summary of the invention

Therefore the objective of the invention is for realize on-the-spot round-the-clock, round-the-clock monitoring, be fit to that the ocean is measured than deep layer and severe sea condition (high sea) environment in carry out the dissolved oxygen sensing sensor of the sensor of testing-under water, to remedy the deficiencies in the prior art.

The utility model comprises the oxygen sensing film sheet, is sealed in the continuous light trapping of fluorescence measurement probe and below thereof in the housing, and the fluorescence measurement probe is the lens combination by light source and axial assembling, optical filter and fixing photodetector in the circuit board, it is characterized in that it also comprises a temperature sensor that is arranged on the Connection Block top, and light trapping is that top is Connection Block, it is overlapped into shading for a plurality of sun-shading caps are alternate with the pad post down and surveys cavity, the bottom is the delustring cavity, and relies on long bolt to connect fixing successively.

Above-mentioned light source is two blue light emitting second tube sheets, and the axis of each light source is for becoming 8 ° of-12 ° of low-angles fixing in the circuit board with the normal of wiring board.

Description of drawings

Further specify the utility model below in conjunction with accompanying drawing.

Fig. 1, the utility model general structure synoptic diagram.

Fig. 2, the utility model divide two-part decomposition texture synoptic diagram.

Cavity decomposition texture synoptic diagram is surveyed in Fig. 3, the utility model shading.

Fig. 4, the utility model the oxygen sensing film sheet and sealed window glass sheet gummed profile.

Wherein: 1, light source; 2, window glass sheet 3, the oxygen sensing film sheet; 4, lens combination; 5, optical filter; 6, photodetector; 7, temperature sensor; 8, cavity is surveyed in shading; 9, delustring cavity; 10, wiring board; 11, counterweight hanging ring; 12, Connection Block; 13, pad post; 14, sun-shading cap; 15, long bolt; 16, protective sleeve; 17, fluorescence measurement probe; 18, light trapping;

Embodiment

As Fig. 1, Fig. 2, the utility model comprises light trapping 18 two parts that fluorescence measurement probe 17 in the oxygen sensing film sheet 3, seal casinghousing and bottom thereof are connected, and wherein light trapping is that venetian blind type light shield and cylindrical shell can adapt to severe sea condition and than the deep layer marine environment.

The utility model comprises the oxygen sensing film sheet 3, be sealed in the light trapping 18 that interior fluorescence measurement probe 17 of housing and below thereof are connected, and fluorescence measurement probe 17 is the fluorescence receiver lens groups 4 by light source 1 and axial assembling, optical filter 5 and fixing 10 photodetector 6 in the circuit board, it is characterized in that it also comprises a temperature sensor 7 that is arranged on the Connection Block top, and light trapping 18 is that top is Connection Block 12, it is a plurality of sun-shading caps 14 and the pad post 13 alternate shading detection cavitys 8 that are overlapped into down, and the bottom is a delustring cavity 9, and relies on long bolt 15 to be connected in series successively or to connect fixedly to form.Above-mentioned delustring cavity 9 is a tack circular cone cavity, as Fig. 3.Cavity 8 is surveyed in this shading and delustring cavity 9 is for eliminating the interference of veiling glare to measuring, as Fig. 2.And temperature sensor 7 is to be the influence of compensate for ambient variation of temperature to measuring accuracy.

As Fig. 4, the oxygen sensing film sheet 3 tops are sealed window glass sheet 2, and are integral with protective sleeve 16 glue envelope.

Above-mentioned light source 1 is two blue light-emitting diodes, and the centre wavelength of light source 1 is the single wavelength light source of 460nm, and model is XH-383BC-02, therefore saves existing light source 1 lens before and the optical system of optical filter composition.

As Fig. 2, the axis of above-mentioned light source 1 is that 8 ° of-12 ° of low-angles are fixed on integrated photodiode on the wiring board 10 for becoming α with the normal of wiring board 10, and from the global design of instrument, the pitch angle is excessive, certainly will need to increase the radial dimension of instrument, be unfavorable for miniaturization.The pitch angle is too small, and the one, cause the reflection ray of 460nm emission light on the window mirror to enter in the lens barrel of fluorescence receiver lens group 4 easily, form noise (, also will avoid) though stopping of optical filter arranged; Photodetector 6 models are OPT-301, and this photodetector 6 is vertically mounted on the wiring board 10.Temperature sensor 7 is a thermistor, and model is SJMFE-395-103F.

Consider hanging conveniently of in-site measurement, the bottom centre place that surveys cavity 8 in shading installs a counterweight hanging ring 11, and is used to hang mass.

The utility model of constructing thus, not only volume is little, in light weight, and can realize that field monitoring, round-the-clock monitoring, suitable ocean are than measuring in deep layer and the severe sea condition environment.

Claims

1, dissolved oxygen sensing sensor under water, comprise the oxygen sensing film sheet (3), be sealed in the light trapping (18) that fluorescence measurement is popped one's head in (17) and the below is connected in the housing, and fluorescence measurement probe (17) is the fluorescence receiver lens group (4) by light source (1) and axial assembling, the wiring board of optical filter (5) and fixed light electric explorer (6), it is characterized in that it also comprises a temperature sensor (7) that is arranged on Connection Block (12) top, and light trapping (18) is that top is Connection Block (12), it is overlapped into shading for a plurality of sun-shading caps (14) are alternate with pad post (13) down and surveys cavity (8), and the bottom is delustring cavity (9), and relies on long bolt (15) to be connected successively fixedly to form.

2, the sensor of dissolved oxygen sensing under water as claimed in claim 1, it is characterized in that light source (1) in the described fluorescence measurement probe (17) be fixed therein axis for the normal of wiring board (10) between become on 8 ° of-12 ° of low-angle wiring boards (10).

3, the sensor of dissolved oxygen sensing under water as claimed in claim 1 is characterized in that light source (1) is two blue light-emitting diodes.

4, the sensor of dissolved oxygen sensing under water as claimed in claim 1 is characterized in that photodetector (6) is the integrated photodiode that is vertically mounted on the wiring board (10).

5, the sensor of dissolved oxygen sensing under water as claimed in claim 1 is characterized in that above-mentioned the oxygen sensing film sheet (3) top is sealed window glass sheet (2), and is integral with protective sleeve (16) glue envelope.

6, the sensor of dissolved oxygen sensing under water as claimed in claim 1 is characterized in that it is tack circular cone cavity that optical cavity body (9) is visited in above-mentioned shading.

7, the sensor of dissolved oxygen sensing under water as claimed in claim 1 is characterized in that the bottom centre place that surveys cavity (8) in shading installs a counterweight hanging ring (11).

8, the sensor of dissolved oxygen sensing under water as claimed in claim 1 is characterized in that said temperature sensor (7) model is the thermistor of SJMFE-395-103F.