CN209927718U

CN209927718U - Remote measurement device based on fluorescence technology

Info

Publication number: CN209927718U
Application number: CN201920037804.7U
Authority: CN
Inventors: 毕晨家; 郭金家; 栾晓宁
Original assignee: Ocean University of China
Current assignee: Ocean University of China
Priority date: 2019-01-10
Filing date: 2019-01-10
Publication date: 2020-01-10
Anticipated expiration: 2029-01-10

Abstract

The utility model discloses a remote measurement's device based on fluorescence technique, its characterized in that: a focusing module, a collecting module and a computer. The utility model uses a continuous laser with the wavelength of 405nm and a micro optical fiber spectrometer, thereby greatly reducing the volume and the weight of the device and realizing miniaturization; the utility model discloses used two kinds of methods to get rid of the interference of background light: under the condition that the background light is stable, the interference of the background light is removed by storing the dark background and using a dimming background method; under the condition that the background light is unstable, the interference of the background light is removed through the time sequence control of the delay signal generator to the laser and the spectrometer.

Description

Remote measurement device based on fluorescence technology

Technical Field

The invention belongs to the technical field of optical instruments and is based on a fluorescence technology.

Background

Fluorescence technology refers to the fact that certain substances emit light with a wavelength longer than an excitation wavelength in a very short time after being excited by light with a certain wavelength, the light is called fluorescence, and different fluorescent substances have different excitation spectra and emission spectra, so that the substances can be identified by the fluorescence.

Disclosure of Invention

The utility model aims at providing a remote measurement's device based on fluorescence technique gets rid of the interference of background light through two kinds of methods to and optimize the lectotype to used laboratory glassware, reduce the volume and the whole quality of device, realize the miniaturization.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a device for remote measurement based on fluorescence technology, comprising: a focusing module, a collecting module and a computer. The focusing module comprises a laser, a reflector and a prism, the collecting module comprises a Newton type reflecting telescope, a collecting convex lens, a delay signal generator, an optical fiber coupler and a spectrometer, and the optical fiber coupler is located at the focus of the convex lens.

The apparatus for remote measurement based on fluorescence technology according to claim 1, wherein the apparatus for remote measurement based on fluorescence technology is characterized in that: a continuous laser with a wavelength of 405nm was used.

The apparatus for remote measurement based on fluorescence technology of claim 1, wherein the collection module is characterized in that: a miniature fiber optic spectrometer is used.

The apparatus for remote measurement based on fluorescence technology of claim 1, wherein the collection module is characterized in that: when the background light is stable, the interference of the background light is removed by saving the dark background and using a dimming background method.

The apparatus for remote measurement based on fluorescence technology of claim 1, wherein the collection module is characterized in that: under the condition that the background light is unstable, the interference of the background light is removed through the time sequence control of the delay signal generator to the laser and the spectrometer.

The utility model has the advantages of it is following:

1. compared with the traditional fluorescence remote measurement, the utility model selects the continuous laser with small volume and the micro fiber spectrometer, thereby greatly reducing the volume and the mass of the whole device and realizing the miniaturization;

2. the utility model can remove the interference of background light by using two methods;

3. the utility model can be used in dangerous occasions where some testers in chemical engineering, strong radiation and the like can not directly or closely use instruments and devices to operate, and the safety of the testers is ensured;

4. the utility model has multiple analysis capabilities, and can detect solid, liquid, gas and suspended particles;

5. the utility model has the capability of judging the sample source, and can classify and judge the sample source by comparing with the database;

6. the utility model discloses the test is fast, need not carry out the preliminary treatment to the sample, and the qualitative analysis of sample element just can be accomplished to tens seconds.

The utility model is simple in operation, the attached drawing explains:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a control diagram of a delay signal generator for a laser and spectrometer;

FIG. 3 is a spectrum of a humic acid sample at 4.5m according to the present invention;

in the figure: the device comprises a 1-405nm continuous laser, a 2-reflector, a 3-prism, a 4-Newton type reflecting telescope, a 5-focusing convex lens, a 6-micro optical fiber spectrometer, a 7-delay signal generator, an 8-sample, a 9-computer and a 10-optical fiber coupler.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings.

As shown in fig. 1, a device for remote measurement based on fluorescence technology is characterized by comprising: the device comprises a focusing module, a collecting module and a computer; the focusing module includes: the device comprises a continuous laser 1, a reflector 2 and a prism 3, wherein the laser with the emission wavelength of 405nm, the reflector 2 and the prism 3 are emitted from the continuous laser, and the collection module comprises a Newton's reflection telescope 4, a focusing convex lens 5, a micro optical fiber spectrometer 6, a delay signal generator 7 and an optical fiber coupler 10; the optical fiber coupler is positioned at the focus of the focusing convex lens 5, and the micro optical fiber spectrometer 6 and the laser 1 are connected with the computer 9 and the delay signal generator 7.

The laser 1 emits laser with the wavelength of 405nm, the laser is reflected by the reflecting mirror 2 and acts on the surface of a sample 8 to be detected through the triangular prism 3, the laser interacts with the sample substance to be detected to generate a fluorescence signal, the fluorescence optical signal is collected by the Newton's reflecting telescope 4, the light signal is focused by the focusing convex lens 5 and enters the micro optical fiber spectrometer 6 through the optical fiber coupler 10, and the signal light is analyzed through the spectrometer 6 and finally the purpose of detecting the sample to be detected is achieved.

As shown in fig. 2, when the background light changes greatly, the delay signal generator is required to control the timing of the laser and the spectrometer, and both the laser and the micro fiber spectrometer in the device are in the external trigger operating mode. Two channels of the time delay signal generator output two paths of TTL signals which are respectively used as external trigger signals of a laser and a spectrometer, wherein the signal of one channel is used for triggering the laser, the frequency is set to be 10Hz, the signal of the other channel is used for triggering the spectrometer, the frequency is set to be 20Hz (the frequency is twice of the frequency of the laser), the laser emits light when the TTL signals are at a high level, the spectrometer stores a fluorescence spectrum containing background light, the laser does not emit light when the TTL signals are at a low level, and the spectrometer stores the background light spectrum, so that the difference between the fluorescence spectrum containing the background light and the background light spectrum in a period is reduced, and the interference of the background light is removed; the method is applicable when the background light is stable, but a simpler realization method is that a time delay signal generator is not used, the background light spectrum is collected once to be used as a difference subtraction template, and then the collected spectrum is subjected to difference subtraction with the background light spectrum, so that the interference of the background light is removed.

Claims

1. The utility model provides a device of remote measurement based on fluorescence technique, its characterized in that has contained focus module, collection module and computer, focus module includes laser instrument, reflector, prism, the collection module includes Newton's formula reflection telescope, collects convex lens, delay signal generator, fiber coupler and spectrum appearance, and fiber coupler is located convex lens's focus department.

2. The apparatus for remote measurement based on fluorescence technology of claim 1, wherein the focusing module is characterized in that: a continuous laser with a wavelength of 405nm was used.

3. The apparatus for remote measurement based on fluorescence technology of claim 1, wherein the collection module is characterized in that: a miniature fiber optic spectrometer is used.

4. The apparatus for remote measurement based on fluorescence technology of claim 1, wherein the collection module is characterized in that: when the background light is stable, the interference of the background light is removed by saving the dark background and using a dimming background method.

5. The apparatus for remote measurement based on fluorescence technology of claim 1, wherein the collection module is characterized in that: under the condition that the background light is unstable, the interference of the background light is removed through the time sequence control of the delay signal generator to the laser and the spectrometer.