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Specific gravity hydrometer

A liquid specific gravity and liquid technology, applied in the field of detection instruments, can solve the problems of being easily affected by the external environment, time-consuming operation, large manual errors, etc., and achieve the effects of improving measurement sensitivity and resolution, less sample consumption, and easy operation.

Inactive Publication Date: 2015-05-27
李学金 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, there are many instruments for measuring the specific gravity of liquids on the market. The operation and reading of the medical refractometer are manual processes, which may cause large manual errors; cumbersome and easily affected by the external environment

Method used

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Effect test

Embodiment 1

[0031] Embodiment one: adopt spectral detection, the light that light source produces is broadband white light, detector adopts spectrometer, under the environment that satisfies resonance condition, normalized spectrum (the ratio of the spectrum that the second detector detects with the first detector ) will appear a resonant absorption peak, such as figure 2 Shown is a schematic diagram of a resonant absorption peak in the normalized spectrum of a liquid hydrometer with a metal layer that can generate surface plasmon on the surface of the sensing part under the condition of using a white light source; this resonant absorption peak can sensitively follow the liquid The corresponding detector detects the change of the position of the resonant absorption peak with the specific gravity of the liquid. In the case of using a white light source, the position of the lowest point of the resonant absorption peak changes with the specific gravity of the liquid as follows: image 3 sho...

Embodiment 2

[0032] Embodiment two: adopt light intensity detection, the light that light source produces is monochromatic light, and what its corresponding detector detects is exactly the variation of light intensity absorption intensity with liquid specific gravity, and the first detector and the second detector can be photosensitive diodes, It can also be a photoresistor. Such as Figure 4 Shown is a liquid hydrometer with a metal layer that can generate surface plasmons attached to the surface of the sensing part. Under the condition of using a monochromatic light source in the wavelength range of 650-700nm, the normalized light intensity (the second detector and the first The ratio of the light intensity detected by the detector) the change law of the intensity with the specific gravity of the liquid. The specific working process of the liquid hydrometer is: the monochromatic light source is coupled to the first detector 2 through the first conductive component 4, and at the same tim...

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Abstract

The invention is applicable to the field of measuring instruments, and provides a specific gravity hydrometer. The specific gravity hydrometer comprises a light source, a first conduction component, a first detector, a second detector, a processing module, and a second conduction component provided with a sensing part, wherein light emitted by the light source is coupled to the first detector by the first conduction component, and passes through the sensing part to form sensing light with specific gravity information of a to-be-detected liquid; the sensing light is coupled to the second detector by the second conduction component; the first detector and the second detector are connected with the processing module; two light signals are processed by the detectors and then sent to the processing module; and the processing module is used for performing operation processing on the two optical signals, obtaining a rate of specific gravity according to a corresponding relation between a prestored liquid specific gravity value and an operation result and outputting the rate of specific gravity. The specific gravity hydrometer adopts an optical fiber surface plasma resonance technology or a micro-nano optical fiber technology, so that no manual intervention is required in the measuring process; the operation is simple and convenient; the amount of sample consumption is less; the volumes of the sensors are reduced; and the measuring sensitivity and the resolution capacity are improved.

Description

technical field [0001] The invention belongs to the field of detection instruments, in particular to a liquid hydrometer. Background technique [0002] At present, there are many instruments for measuring the specific gravity of liquids on the market. The operation and reading of the medical refractometer are manual processes, which may cause large manual errors; It is cumbersome and easily affected by the external environment. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a hydrometer, which aims to provide a hydrometer with small volume, high sensitivity and resolution, and no manual operation. [0004] The invention provides a liquid hydrometer, comprising: [0005] light source; [0006] The first detector is used to convert the received reference optical signal into a first electrical signal; [0007] The second detector is used to convert the received sensing light signal into a second electrical sign...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N9/24
Inventor 李学金陈郁芝周华胜
Owner 李学金
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