CN104931463A

CN104931463A - Conical space compression plasma detection system

Info

Publication number: CN104931463A
Application number: CN201410096280.0A
Authority: CN
Inventors: 刘明; 郭闯
Original assignee: Yiheng Technology (beijing) Co Ltd
Current assignee: Yiheng Technology (beijing) Co Ltd
Priority date: 2014-03-17
Filing date: 2014-03-17
Publication date: 2015-09-23

Abstract

The invention discloses a conical space compression plasma detection system, a space compression technology is applied in plasma detection, and the ability of plasma detection of various elements and the detection lower limit are enhanced. The conical space compression plasma detection system is a system which can independently complete element detection and material component content detection; the system is mainly composed of a light source module, a conical compression module, a sample module, a detection module, a logic module and a display module; the logic control module is connected with the control module, the detection module and the display module; the control module achieves manipulation of the light source module and the detection module; the light source module completes work of light on the sample module through the conical compression module; the detection module is used for collecting information of the sample module and transmitting to the logic module. The plasma detection system has better detection precision and lower detection lower limit than those of a traditional system, and can realize zero pretreatment of samples.

Description

Cone space plasma compression detection system

Technical field

The invention belongs to detection system, be specifically related to a kind of detection system realizing strengthening plasma detection by cone space compression.

Background technology

Plasma detects, and be a kind of spectrum detection technique risen gradually in recent years by measurement of species spatial induction plasma spectrometry, it is the one of atomic emission spectrum.Up to the present, plasma technique is the known technology that uniquely can detect the spectrum of all elements in any environment; Also can detect the various sample form being in solid, liquid, powder, gas form simultaneously.Simultaneously plasma detection technique also have measuring speed fast, can the lot of advantages such as long-range non-cpntact measurement, system architecture composition be simple.The advantage a lot of based on plasma detection technique and versatility, the detection technique that someone is referred to as " omnipotent ".

Simultaneously it does not need to sample carry out pre-service, can Simultaneous multi element analysis, device simple, highly sensitive and destructive little, the advantage because of its uniqueness has now been employed and the numerous areas such as metallurgy, environment, archaeology, address, medical science.

But traditional plasma detects exists some problems, such as Monitoring lower-cut is enough not low, cause the minimum value that detects of a lot of constituent content higher than national Specification value, the all-round popularization detected to plasma like this adds difficulty to food security and environment measuring.Largely can reduce Monitoring lower-cut by the present invention, make more detections meet corresponding state-set standard.

Cone space enhanced squeezing plasma detection system has outstanding feature: (1), lower Monitoring lower-cut, farthest meet different industries user demand, can detect corresponding national master gauge fixed number value; (2), detect the plasma space compression that induces of sample surfaces, strengthen plasma intensity that detecting module detects; (3), unique taper and aspheric surface composite design, being combined by both, the normal service efficiency of laser instrument is not affected: (4), enhancing are suitable for wide while space compression plasma yet, owing to being the space compression inducing plasma, strengthen at detecting module place, therefore be applicable to the detection of any material.

Summary of the invention

The object of the invention is to provide a kind of cone space enhanced squeezing plasma detection system, this detection system better can detect element kind in material, and has lower Monitoring lower-cut; It has the outstanding features such as nulling sample pre-service, zero consumptive material demand, zero damage.

For achieving the above object, the present invention adopts following scheme:

A kind of cone space enhanced squeezing plasma detection system, it can complete independently inspection work, assist without the need to miscellaneous equipment, detection system is made up of light source module, conical compression module, sample block, control module, detecting module, logic module and display module;

Light source module is mainly made up of laser, and the wavelength of laser can be 1064,532,355,266,213 or 193nm, also can be other light source.

The controlled module of detecting module controls, detecting module certain hour after light source module sends light carries out collection signal, the Signal transmissions gathered is to logic module, logic module calculates element kind and content contained by tie substance, logic module also needs to send instruction to control module simultaneously, makes control module perform corresponding control information, because steering order needed for different material is different, could realize optimal detection like this, reach lowest detection lower limit.

Wherein in some embodiments, described conical compression module makes taper and aspheric surface, and inwall has certain wavelength high reverse--bias, while detecting module place strengthens, does not affect the normal service efficiency of laser instrument.

Adopt above-mentioned cone space enhanced squeezing plasma detection system to realize a detection, comprise the following steps:

1., logic module provides corresponding instruction and is sent to control module, detection material placed above Yang Ping module correspondence position, and control module, according to instruction, gives light source module and detecting module instruction respectively;

2., light source module receives LASER Light Source bright dipping after instruction, is irradiated to detected sample surfaces, to induce etc. three-dimensional;

3., plasmon is in the internal reflection of conical compression module and transmission, at detecting module, place is compressed to maximum intensity, and detecting module starts collection signal immediately, transfers signals to logic module after collection, logic module process is obtained a result and to be presented on display module, completes whole testing process.

Present invention improves conventional plasma to detect:

1, Monitoring lower-cut is high, and many detections can not detect national Specification numerical value;

2, plasma detected intensity is weak;

3, enhancement method is expensive, mainly realizes strengthening the three-dimensional intensity such as detection material induces by increasing laser instrument;

4, under strengthening effect versatility, traditional plasma detects, and strengthens general just for single-element.

There is due to cone space plasma compression detection system the distinguishing features such as sample zero pre-service, zero consumptive material demand and zero damage, detect compared with conventional plasma again and there is lower detection limit, more broad applicability and superelevation cost performance.

Accompanying drawing explanation

Structural drawing of the present invention shown in Fig. 1;

Conical compression module signal connection layout embodiment illustrated in fig. 2;

Embodiment

For feature of the present invention, technological means and the specific purposes reached, function can be understood further, resolve the advantages and spirit of the present invention, by the present invention is further elaborated by the following examples.

The present invention has put forward a kind of design proposal of plasma detection system, provides the method for inspection that has more low-detection lower limit.

The structural drawing of example of the present invention is see accompanying drawing 1, and conical compression plasma schematic diagram is Fig. 2, and lower end connects Yang Ping module (3), and side connects detecting module (5), and inwall X is for having wavelength 150-450nm high reverse--bias.

Patent of the present invention forms primarily of light source module (1), conical compression module (2), sample block (3), control module (4), detecting module (5), logic module (6) and display module (7) seven part.

This patent centering realizes Time-sharing control to light source module (1) and detecting module (5) by control module (4) and to have cooperated corresponding function, the corresponding instruction that control module (4) provides according to logic module (6), sets out the time delay between (1) bright dipping of control light source module and detecting module (5) collection.

Secondly focused on by fibre-optical probe front end can more effective collection plasmon signal for detecting module (5), is transferred to logic module (6), more accurately to complete computing below and result exports.

The present invention in use, (solid-state, liquid state all can directly be fixed directly detection sample can be fixed to correspondence position in sample block (3), can directly fix after gaseous compressed), without the need to pre-service, particularly by the pre-service of chemical reagent.

Conical compression module (2) is an indispensable part in whole plasma detection system, it is responsible for the more effective plasma compression gone out by monitoring material spatial induction to the probe segment of detecting module (5), makes it possible to obtain stronger plasma signal.

In detection material process, set corresponding test item and information, start detection, within short several seconds, just directly can demonstrate testing result, without the need to the abundant reaction stand-by period that traditional chemical detects.Achieve multiple element simultaneously, at once detect.

In some application examples, can the crops such as Chinese herbal medicine, grain or fruit be directly placed in sample block (3), then set corresponding parameter, start detection by logic module (6), metal species and content contained by these crops can be obtained immediately.

Advantage of the present invention:

1, lower Monitoring lower-cut, farthest meets different industries user demand, can detect corresponding national master gauge fixed number value;

2, plasma detection place has stronger signal, and the plasma gone out by tested substance spatial induction is effectively compressed to detecting module probe place, thus obtains stronger signal;

3, unique plasmon space compression, detection system compression module of the present invention is not affecting under laser service efficiency prerequisite, according to plasmon feature, achieves one and plasma compression is gone out method to detecting module.

4, strengthen and be suitable for wide, owing to being realize collection signal by plasmon compression to strengthen, therefore all detection samples are all effective, are applicable to all samples and detect.

The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.

Claims

1. a cone space plasma compression detection system, it is characterized in that, described plasma detection system forms (7) by light source module (1), conical compression module (2), sample block (3), control module (4), detecting module (5), logic module (6) and display module and forms;

Described light source module (1) is by LASER Light Source, also can be other light sources such as fluorescence, is realized going out photocontrol by control module (4), goes out photocontrol needs and detecting module (5) and works in coordination with, and mates specific time delay use;

Described conical compression module (2) realizes laser in light source module (1) and is radiated at sample block (3) above after sample, induce the space compression of plasma, realized the plasma space management and control induced by little cone space.Simultaneously little cone space inwall has ultraviolet light wave band high-reflecting film, and wavelength coverage is 150-450nm, this wavelength on light source module light almost without any impact.Little cone space, in conjunction with detecting module (5), makes corresponding plasma farthest enter into module (5), strengthens detectability;

Described module (3) realizes, to detecting the fixing of sample and clamping, ensureing the accuracy detected, and sample block the difference of kind per sample can carry out correspondence adjustment, realizes gas, solid, fluid sample and all can fix, in order to detection;

Described logic module (6) realize to the coordination of whole system with normally work, and complete corresponding testing result and output to display module (7), detected data foundation can be set rule simultaneously and store.

Described conical compression module (2) to be combined with aspheric surface by low-angle circular cone and to realize, be fixed on sample block (3) and inspire sample plasma place, meanwhile also fix detecting module (5), the plasma making the light source in light source module (1) induce sample in sample block (3) realizes spatially isoionic compression by conical compression module (2), strengthen Detection results, structural drawing is Fig. 2.

2. cone space plasma compression detection system according to claim 1, the laser part wavelength that it is characterized in that in light source module (1) is 1064,532,355,266,213 or 193nm.

3. cone space plasma compression detection system according to claim 1, it is characterized in that, described conical compression module (2), low-angle taper and aspheric surface is adopted to realize, and inwall has a wavelength range high reverse--bias, wavelength coverage is 150-450nm, and the plasma of compression is reflexed to detecting module (5) by conical compression module, realize probe portion plasma density to strengthen, improve detectability and reduce Monitoring lower-cut.

4. cone space plasma compression detection system according to claim 1, it is characterized in that, described detecting module (5) is by Optical Fiber Transmission and be added with optically focused Coupling optics at fiber-optic probe end, realizes the collection of at utmost plasma signal.

5. adopt a cone space plasma compression detection system described in any one of Claims 1 to 4, it is characterized in that, comprise the following steps:

1., logic module (6) process detecting module (5) image data, display module (7) is transferred to after process, finally present testing result, herewith logic module (6) is also responsible for sending instruction to control module (4) therewith, has worked in coordination with detection;

2., when the present invention detects, the corresponding mass that control module (4) receives logic module (6) controls light source module (1) and detecting module (5) respectively, in testing process, after light source bright dipping in light source module (1), detecting module (5) gathers plasma signal after setting time delay;

3., before the present invention detects, be fixed on by detection sample above sample block (3), this module ensure that the relative position uniqueness of detected sample, after demarcating like this, can ensure the accuracy of detected sample material content;

4., conical compression module (2) ensure that and excites tested substance surface to produce the required energy of plasma, and compact structure designs, the use of compound aspheric mirror ensures while space compression plasma, do not affect the service efficiency of laser in light source module (1), better plasma signal can be strengthened, meanwhile reduce volume, add system stability.