CN106769730A - The autonomous modification method of laser diode power - Google Patents
The autonomous modification method of laser diode power Download PDFInfo
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- CN106769730A CN106769730A CN201611254806.9A CN201611254806A CN106769730A CN 106769730 A CN106769730 A CN 106769730A CN 201611254806 A CN201611254806 A CN 201611254806A CN 106769730 A CN106769730 A CN 106769730A
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- 238000012545 processing Methods 0.000 claims description 39
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N15/075—Investigating concentration of particle suspensions by optical means
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
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Abstract
The invention discloses a kind of autonomous modification method of laser diode power, including：Step (1)：Concavees lens, the first photoelectric receiving tube are set gradually in the light path of laser；Step (2)：The photoelectric receiving tube of both sides interval setting second of the first photoelectric receiving tube, the 3rd photoelectric receiving tube；Step (3)：Calculate luminous power P1, luminous power P2, luminous power P3；Step (4)：Record decay luminous power Pr1, decay luminous power Pr2, decay luminous power Pr3；Step (5)：Calculate the first photoelectric receiving tube, the second photoelectric receiving tube, the attenuation coefficient of the 3rd photoelectric receiving tube；Step (6)：Calculate the first photoelectric receiving tube, the second photoelectric receiving tube, the concentration of the 3rd each Autonomous test of photoelectric receiving tube；Step (7)：Calculate the first photoelectric receiving tube, the second photoelectric receiving tube, the respective detection correction value of the 3rd photoelectric receiving tube；Step (8)：Calculate average detected correction value.The invention is easy to operate, with accuracy higher.
Description
Technical field
The invention is related to laser diode techniques field, more particularly to a kind of autonomous side of amendment of laser diode power
Method.
Background technology
During existing laser diode use, laser diode is influenceed by itself service life, by one
After the use of section time, its power output occurs a certain degree of decay, is now carrying out detection work using laser diode
When making, influenceed by power output decay, detection data can have certain error.
But the correction means of existing laser diode power, more using the circuit for changing laser diode input, from
And increase the input power of laser diode and be modified, the method does not have theoretical foundation to support, after increase input power,
The power output of laser diode can not be held, and then when being detected, larger error easily occur, be declined for power
Subtract correction effect not good enough.
The content of the invention
The purpose of the invention is to provide a kind of autonomous modification method of laser diode power, the method operation side
Just, coordinated without complicated device, it is not required that artificial assistance, it is thus only necessary to which processing module is calculating the dense of thing to be detected
During angle value, while detecting the power of laser diode, this method practicality is higher, and use cost is low, workable, after amendment
Data have accuracy higher.
The above-mentioned purpose of the invention is achieved by the following technical programs.
A kind of autonomous modification method of laser diode power, the described method comprises the following steps：
Step (1)：Concavees lens, the first photoelectric receiving tube are set gradually in the light path of laser diode transmitting laser；
Step (2)：The both sides of first photoelectric receiving tube are respectively separated the second photoelectric receiving tube of setting, the 3rd photoelectricity and connect
Closed tube, first photoelectric receiving tube, second photoelectric receiving tube, the orientation of the 3rd photoelectric receiving tube with it is described
The light path of laser diode transmitting laser is vertical；
Step (3)：After the laser diode is opened, connect using first photoelectric receiving tube, second photoelectricity
Closed tube, the 3rd photoelectric receiving tube receive the laser scattered by the concavees lens that the laser diode sends, and pass through
Processing module calculates the luminous power P1 that the first photoelectric receiving tube detection is obtained, and the second photoelectric receiving tube detection is obtained
Luminous power P2, the luminous power P3 that the 3rd photoelectric receiving tube detection is obtained；
Step (4)：When the processing module calculates first photoelectric receiving tube, second photoelectric receiving tube, described
When the luminous power that the detection of 3rd photoelectric receiving tube is obtained starts to reduce, the decay that the first photoelectric receiving tube detection is obtained is recorded
Luminous power Pr1, the decay luminous power Pr2 that the second photoelectric receiving tube detection is obtained, the 3rd photoelectric receiving tube is detected
The decay luminous power Pr3 for arriving；
Step (5)：First photoelectric receiving tube, second photoelectric receiving tube, institute are calculated by the processing module
The attenuation coefficient that the 3rd each Autonomous test of photoelectric receiving tube is obtained is stated, the attenuation coefficient of first photoelectric receiving tube is denoted as K1,
The attenuation coefficient of second photoelectric receiving tube is denoted as K2, and the attenuation coefficient of the 3rd photoelectric receiving tube is denoted as K3, K1=
Pr1/P1, K2=Pr2/P2, K3=Pr3/P3；
Step (6)：First photoelectric receiving tube, second photoelectric receiving tube, institute are calculated by the processing module
The concentration of the thing to be detected that the 3rd each Autonomous test of photoelectric receiving tube is obtained is stated, it is to be checked that the first photoelectric receiving tube detection is obtained
The concentration for surveying thing is PMr1, and the concentration of the thing to be detected that the second photoelectric receiving tube detection is obtained is PMr2, the 3rd light
The concentration of the thing to be detected that electric reception pipe detection is obtained is PMr3；
Step (7)：First photoelectric receiving tube, second photoelectric receiving tube, institute are calculated by the processing module
The detection correction value of the concentration of the thing to be detected that the 3rd each Autonomous test of photoelectric receiving tube is obtained is stated, first photoelectric receiving tube
Detection correction value is PMc1, PMc1=PMr1/K1, and the detection correction value of second photoelectric receiving tube is PMc2, PMc2=
PMr2/K2, the detection correction value of the 3rd photoelectric receiving tube is PMc3, PMc3=PMr3/K3；
Step (8)：Average detected correction value is calculated by the processing module, the average detected correction value is denoted as
PMc0, PMc0=(PMc1+PMc2+PMc3)/3.
Be scattered for the laser that the laser diode sends by the concavees lens by the present invention, then by first light
Electric reception pipe, second photoelectric receiving tube, the 3rd photoelectric receiving tube receive that the laser diode sends by institute
The laser of concavees lens scattering is stated, and first photoelectric receiving tube, second photoelectricity are recorded by the processing module respectively
The luminous power of the laser that reception pipe, the 3rd photoelectric receiving tube are received, when the laser diode just comes into operation, i.e.,
When the laser diode normally can stably work, the luminous power P1 that the first photoelectric receiving tube detection is obtained, institute
The luminous power P2 that the detection of the second photoelectric receiving tube is obtained is stated, the 3rd photoelectric receiving tube detects that the luminous power P3 for obtaining can
The correspondence laser diode is in normal operating conditions, and work as first photoelectric receiving tube, second photoelectric receiving tube,
When the luminous power of the laser that the 3rd photoelectric receiving tube is received begins to decline, now because the concavees lens are to the shadow of laser
After sound is fixed, therefore laser diode is through use after a while described in this interval scale, power attenuation state is entered,
Power should now be proceeded by independently to correct, the processing module records the decay light that the first photoelectric receiving tube detection is obtained
Power P r1, the decay luminous power Pr2 that the second photoelectric receiving tube detection is obtained, the 3rd photoelectric receiving tube detection is obtained
Decay luminous power Pr3, the influence due to the concavees lens to laser is fixed, therefore the concavees lens also will not be to described
The decay of laser diode is impacted, and the attenuation coefficient of first photoelectric receiving tube is K1, second photoelectric receiving tube
Attenuation coefficient be K2, the attenuation coefficient of the 3rd photoelectric receiving tube is K3, K1=Pr1/P1, K2=Pr2/P2, K3=
Pr3/P3, and during laser diode decay, the concentration of the thing to be detected that the first photoelectric receiving tube detection is obtained is
PMr1, the concentration of the thing to be detected that the second photoelectric receiving tube detection is obtained is PMr2, the 3rd photoelectric receiving tube detection
The concentration of the thing to be detected for obtaining is PMr3, and the numerical value of PMr1/PMc1, PMr2/PMc2, PMr3/PMc3 and respective decay
Coefficient is also identical, i.e. PMr1/PMc1=Pr1/P1, PMr2/PMc2=Pr2/P2, PMr3/PMc3=Pr3/P3；Therefore described the
The detection correction value PMc1=PMr1/K1 of one photoelectric receiving tube, the detection correction value PMc2=of second photoelectric receiving tube
PMr2/K2, the detection correction value PMc3=PMr3/K3 of the 3rd photoelectric receiving tube；It is final to be subtracted using the method averaged
It is small, average detected correction value PMc0, PMc0=(PMc1+PMc2+PMc3)/3 is obtained, so as to reduce the error for randomly generating；Profit
The laser diode is received with first photoelectric receiving tube, second photoelectric receiving tube, the 3rd photoelectric receiving tube
The laser scattered by the concavees lens for sending, first photoelectric receiving tube, described the are obtained by the processing module
Two photoelectric receiving tubes, the corresponding attenuation coefficient of the 3rd photoelectric receiving tube, then attenuation correction is carried out by formula；The method is grasped
Facilitate, coordinated without complicated device, it is not required that artificial assistance, it is thus only necessary to which the processing module is calculating described
During the concentration value of thing to be detected, while detecting the power of the laser diode, this method practicality is higher, and use cost is low,
Workable, revised data have accuracy higher.
Preferably, place is respectively provided with second photoelectric receiving tube, institute at equal intervals for the both sides of first photoelectric receiving tube
State the 3rd photoelectric receiving tube；
Second photoelectric receiving tube, the 3rd photoelectric receiving tube are arranged on first photoelectric receiving tube at equal intervals
Both sides, can as much as possible cause first photoelectric receiving tube, second photoelectric receiving tube, the 3rd opto-electronic receiver
The laser situation by scattering that pipe is received is close, reduces error.
Specifically, the thing to be detected is the gas or little particle in air ambient.
Specifically, the laser diode, the concavees lens, first photoelectric receiving tube orientation it is recessed with described
The key light overlapping of axles of lens；
First photoelectric receiving tube can receive the laser without concavees lens scattering, to reduce error.
Specifically, first photoelectric receiving tube, second photoelectric receiving tube, the 3rd photoelectric receiving tube receive institute
After stating laser, optical power signals are converted into power electric signal using photoelectric conversion circuit, recycle the photoelectric conversion circuit
The power electric signal is sent to the processing module.
Specifically, first photoelectric receiving tube, second photoelectric receiving tube, the 3rd photoelectric receiving tube receive institute
After stating the laser scattered in laser, convert optical signals to scatter electric signal using photoelectric conversion circuit, recycle described
The scattering electric signal is sent to the processing module by photoelectric conversion circuit.
Preferably, in the step (3), after the laser diode starts, the processing module real-time continuous calculate institute
State the first photoelectric receiving tube, second photoelectric receiving tube, the 3rd photoelectric receiving tube and detect the luminous power for obtaining, when described
The luminous power that first photoelectric receiving tube, second photoelectric receiving tube, the 3rd photoelectric receiving tube detection are obtained tends towards stability
When, then assert that the laser diode enters stable state, first photoelectric receiving tube under start recording stable state, institute
State the second photoelectric receiving tube, the 3rd photoelectric receiving tube and detect the luminous power for obtaining, i.e. P1, P2, P3；
When the laser diode starts, due to just starting, the power of the laser diode may ripple
It is dynamic, therefore, need to treat that the power of the laser diode remains stable, i.e., after described laser diode enters stable state, note
Power under record stable state, can ensure the accuracy of data.
Further, methods described also includes step (9)：When K1, K2, K3 any two are less than 60%, the treatment
Module recognizes that the laser diode is in abnormality；
When the attenuation coefficient is less than 60%, the laser diode is then in abnormality, and staff can be carried out
Change or maintenance work, to ensure being normally carried out for follow-up work.
Compared with prior art, the invention beneficial effect is：
1st, the invention obtains signal using the first photoelectric receiving tube, the second photoelectric receiving tube, the 3rd photoelectric receiving tube,
Attenuation coefficient is obtained by processing module, attenuation correction is carried out by formula；The method is easy to operate, enters without complicated device
Row coordinates, it is not required that artificial assistance, it is thus only necessary to which processing module is when the concentration value of thing to be detected is calculated, while detecting laser
The power of diode, this method practicality is higher, and use cost is low, workable, and revised data have standard higher
True property.
2nd, the processing module of the invention calculates attenuation coefficient, when attenuation coefficient is less than 60%, laser diode
Abnormality is then in, even if making up error by autonomous amendment, cannot also avoid impacting final detection result, this
When staff can be changed or maintenance work, to ensure being normally carried out for follow-up work.
Brief description of the drawings
Fig. 1 is the FB(flow block) of the autonomous modification method of laser diode power of embodiment 1.
Fig. 2 is the FB(flow block) of the autonomous modification method of laser diode power of embodiment 2.
Specific embodiment
Clear, complete description is carried out to the technical scheme of each embodiment of the invention below with reference to accompanying drawing, it is clear that
Described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Created based on the present invention
The embodiment made, the resulting all other implementation on the premise of creative work is not made of those of ordinary skill in the art
Example, belongs to the scope that the invention is protected.
It is term " " center ", " on ", D score, "left", "right", " perpendicular, it is necessary to explanation in the description of the invention
Directly ", the orientation or position relationship of the instruction such as " level ", " interior ", " outward " are, based on orientation shown in the drawings or position relationship, to be only
Described with simplified for the ease of description the invention, must had rather than the device or element for indicating or implying meaning specific
Orientation, with specific azimuth configuration and operation, therefore it is not intended that limitation to the invention.Additionally, term " the
One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that indicating or implying relative importance.
, it is necessary to explanation, unless otherwise clearly defined and limited, term " is pacified in the description of the invention
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integratedly
Connection；Can mechanically connect, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary,
Can be two connections of element internal.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
Concrete meaning of the language in the invention.
The invention is described in further detail below by specific embodiment and with reference to accompanying drawing.
Embodiment 1
As shown in figure 1, a kind of autonomous modification method of laser diode power, specifically includes following steps：Step (1)：
Concavees lens, the first photoelectric receiving tube are set gradually in the light path of laser diode transmitting laser；Step (2)：First opto-electronic receiver
The both sides of pipe are respectively separated the second photoelectric receiving tube of setting, the 3rd photoelectric receiving tube, the first photoelectric receiving tube, the second opto-electronic receiver
Pipe, the orientation of the 3rd photoelectric receiving tube are vertical with the light path of laser diode transmitting laser；Step (3)：When the pole of laser two
After pipe is opened, receive what laser diode sent using the first photoelectric receiving tube, the second photoelectric receiving tube, the 3rd photoelectric receiving tube
By the laser that concavees lens are scattered, the first photoelectric receiving tube is calculated by processing module and detects the luminous power P1 for obtaining, second
The luminous power P2 that photoelectric receiving tube detection is obtained, the luminous power P3 that the detection of the 3rd photoelectric receiving tube is obtained；Step (4)：Work as treatment
Module calculates the first photoelectric receiving tube, the second photoelectric receiving tube, the 3rd photoelectric receiving tube and detects that the luminous power for obtaining starts to reduce
When, the decay luminous power Pr1 that record the first photoelectric receiving tube detection is obtained, the decay light work(that the detection of the second photoelectric receiving tube is obtained
Rate Pr2, the decay luminous power Pr3 that the detection of the 3rd photoelectric receiving tube is obtained；Step (5)：First photoelectricity is calculated by processing module
The attenuation coefficient that reception pipe, the second photoelectric receiving tube, the 3rd each Autonomous test of photoelectric receiving tube are obtained, by the first photoelectric receiving tube
Attenuation coefficient is denoted as K1, and the attenuation coefficient of the second photoelectric receiving tube is denoted as K2, and the attenuation coefficient of the 3rd photoelectric receiving tube is denoted as K3,
K1=Pr1/P1, K2=Pr2/P2, K3=Pr3/P3；Step (6)：First photoelectric receiving tube, second are calculated by processing module
The concentration of the thing to be detected that photoelectric receiving tube, the 3rd each Autonomous test of photoelectric receiving tube are obtained, the first photoelectric receiving tube detection is obtained
The concentration of thing to be detected be PMr1, the concentration of thing to be detected that the detection of the second photoelectric receiving tube is obtained is PMr2, the 3rd photoelectricity
The concentration of the thing to be detected that reception pipe detection is obtained is PMr3；Step (7)：By processing module calculate the first photoelectric receiving tube,
The detection correction value of the concentration of the thing to be detected that the second photoelectric receiving tube, the 3rd each Autonomous test of photoelectric receiving tube are obtained, the first light
The detection correction value of electric reception pipe is PMc2 for the detection correction value of PMc1, PMc1=PMr1/K1, the second photoelectric receiving tube,
PMc2=PMr2/K2, the detection correction value of the 3rd photoelectric receiving tube is PMc3, PMc3=PMr3/K3；Step (8)：By treatment
Module calculates average detected correction value, and average detected correction value is denoted as PMc0, PMc0=(PMc1+PMc2+PMc3)/3；Wherein,
Thing to be detected is gas or little particle in air ambient.
Be scattered for the laser that laser diode sends by concavees lens by the present invention, then by the first photoelectric receiving tube, the
Two photoelectric receiving tubes, the 3rd photoelectric receiving tube receive the laser scattered by concavees lens that laser diode sends, and by place
Reason module records the light work(of the laser that the first photoelectric receiving tube, the second photoelectric receiving tube, the 3rd photoelectric receiving tube are received respectively
Rate, when laser diode just comes into operation, i.e., when laser diode normally can stably work, the first photoelectric receiving tube
The luminous power P1 that detection is obtained, the luminous power P2 that the detection of the second photoelectric receiving tube is obtained, the 3rd photoelectric receiving tube detection is obtained
Luminous power P3 can correspond to laser diode and be in normal operating conditions, and when the first photoelectric receiving tube, the second opto-electronic receiver
When the luminous power of the laser that pipe, the 3rd photoelectric receiving tube are received begins to decline, the now influence due to concavees lens to laser is
It is fixed, therefore after this interval scale laser diode is through use after a while, power attenuation state is entered, should now open
Beginning carries out power and independently corrects, and processing module records the decay luminous power Pr1 that the detection of the first photoelectric receiving tube is obtained, the second photoelectricity
The decay luminous power Pr2 that reception pipe detection is obtained, the decay luminous power Pr3 that the detection of the 3rd photoelectric receiving tube is obtained, due to recessed
Influence of the mirror to laser is fixed, therefore concavees lens will not also impact to the power attenuation of laser diode itself,
The attenuation coefficient of one photoelectric receiving tube is K1, and the attenuation coefficient of the second photoelectric receiving tube is K2, the decay of the 3rd photoelectric receiving tube
Coefficient is K3, K1=Pr1/P1, K2=Pr2/P2, K3=Pr3/P3, and during laser diode decay, the inspection of the first photoelectric receiving tube
The concentration of the thing to be detected for measuring is PMr1, and the concentration of the thing to be detected that the detection of the second photoelectric receiving tube is obtained is PMr2, the
The concentration of the thing to be detected that the detection of three photoelectric receiving tubes is obtained is PMr3, and PMr1/PMc1, PMr2/PMc2, PMr3/PMc3
Numerical value is also identical with respective attenuation coefficient, i.e. PMr1/PMc1=Pr1/P1, PMr2/PMc2=Pr2/P2, PMr3/PMc3=
Pr3/P3；Therefore the detection correction value PMc1=PMr1/K1 of the first photoelectric receiving tube, the detection correction value of the second photoelectric receiving tube
PMc2=PMr2/K2, the detection correction value PMc3=PMr3/K3 of the 3rd photoelectric receiving tube；The final method using averaging
Reduce, average detected correction value PMc0, PMc0=(PMc1+PMc2+PMc3)/3 is obtained, so as to reduce the error for randomly generating；
Using the first photoelectric receiving tube, the second photoelectric receiving tube, the 3rd photoelectric receiving tube receive laser diode send by recessed
The laser of mirror scattering, the first photoelectric receiving tube, the second photoelectric receiving tube, the 3rd photoelectric receiving tube correspondence are obtained by processing module
Attenuation coefficient, then attenuation correction is carried out by formula；The method is easy to operate, is coordinated without complicated device, also not
Artificial assistance is needed, it is thus only necessary to which processing module is when the concentration value of thing to be detected is calculated, while detecting the work(of laser diode
Rate, this method practicality is higher, and use cost is low, workable, and revised data have accuracy higher.
Wherein, be scattered for the laser that laser diode sends by concavees lens, when concavees lens are scattered to laser, can make
Into the decay of laser energy, and the attenuation degree of laser energy with by the distance dependent inside concavees lens, due in concavees lens
Portion's thickness is narrower, therefore can be considered that concavees lens are identical to the attenuation degree of laser energy, therefore when laser diode is normally used
When, by the laser power after scattering for the normal power of laser diode subtracts attenuation value of the concavees lens to power, and work as
When the power of laser diode starts decay, the laser power after scattering is that the decay power of laser diode subtracts concavees lens pair
The attenuation value of power, therefore when the first photoelectric receiving tube, the second photoelectric receiving tube, the 3rd photoelectric receiving tube receive the pole of laser two
Pipe send by concavees lens scatter laser when, the laser diode power for detecting and the laser diode for detecting decline
Subtract power to remove outside laser diode own power influence of fading, the decay that also concavees lens are caused, and concavees lens are caused declines
Subtracting degree can be considered as approximate fixation.
Preferably, place is respectively provided with the second photoelectric receiving tube, the 3rd photoelectricity and connects at equal intervals for the both sides of the first photoelectric receiving tube
Closed tube；
Second photoelectric receiving tube, the 3rd photoelectric receiving tube are arranged on the both sides of the first photoelectric receiving tube at equal intervals, when sharp
Light is by after concavees lens scattering, the second photoelectric receiving tube, the 3rd photoelectric receiving tube can receive laser, the second opto-electronic receiver
Pipe, the azimuthal symmetry of the 3rd photoelectric receiving tube, the air conditions of surrounding are approximate, and the concentration with detectable substance is also approximate, to the greatest extent can may be used
Energy ground causes the laser feelings by scattering that the first photoelectric receiving tube, the second photoelectric receiving tube, the 3rd photoelectric receiving tube are received
Condition is close, reduces error.
In the present embodiment, the primary optical axis of laser diode, concavees lens, the orientation of the first photoelectric receiving tube and concavees lens
Overlap；
First photoelectric receiving tube can receive the laser without concavees lens scattering, to reduce error.
In the present embodiment, after the first photoelectric receiving tube, the second photoelectric receiving tube, the 3rd photoelectric receiving tube receive laser, profit
Optical power signals are converted into power electric signal with photoelectric conversion circuit, recycle photoelectric conversion circuit to send power electric signal
To processing module.
In the present embodiment, the first photoelectric receiving tube, the second photoelectric receiving tube, the 3rd photoelectric receiving tube occur in receiving laser
After the laser of scattering, convert optical signals to scatter electric signal using photoelectric conversion circuit, recycle photoelectric conversion circuit to dissipate
Electric signal is sent to processing module.
In the step of the present embodiment (3), after laser diode starts, processing module real-time continuous calculate the first opto-electronic receiver
The luminous power that pipe, the detection of the second photoelectric receiving tube, the 3rd photoelectric receiving tube are obtained, when the first photoelectric receiving tube, the second photoelectricity connect
When the luminous power that closed tube, the detection of the 3rd photoelectric receiving tube are obtained tends towards stability, then assert that laser diode enters stable state, opens
Begin to record the first photoelectric receiving tube under stable state, the second photoelectric receiving tube, the 3rd photoelectric receiving tube and detect the light work(for obtaining
Rate, i.e. P1, P2, P3；
When laser diode starts, due to just starting, the power of laser diode may fluctuate, therefore,
Need to treat that the power of laser diode remains stable, i.e., after laser diode enters stable state, the work(under record stable state
Rate, can ensure the accuracy of data.
Embodiment 2
As shown in Fig. 2 the present embodiment provides a kind of autonomous modification method of laser diode power, the difference with embodiment 1
It is, the autonomous modification method of this laser diode power, also including step (9)：When K1, K2, K3 any two are less than 60%,
Processing module identification laser diode is in abnormality；
Processing module calculates attenuation coefficient, and when attenuation coefficient is less than 60%, laser diode is then in abnormality,
Even if making up error by autonomous amendment, cannot also avoid impacting final detection result, now staff can enter
Row is changed or maintenance work, to ensure being normally carried out for follow-up work.
Finally it should be noted that：Above example is only used to illustrate the technical scheme of the invention, rather than its limitations；
Although being described in detail to the invention with reference to the foregoing embodiments, it will be understood by those within the art that：
It can still modify to the technical scheme described in previous embodiment, or to which part or all technical characteristic
Carry out equivalent；And these modifications or replacement, the essence of appropriate technical solution is departed from the invention embodiment
Technical scheme.
Claims (8)
1. the autonomous modification method of a kind of laser diode power, it is characterised in that the described method comprises the following steps：
Step (1)：Concavees lens, the first photoelectric receiving tube are set gradually in the light path of laser diode transmitting laser；
Step (2)：The both sides of first photoelectric receiving tube are respectively separated the second photoelectric receiving tube of setting, the 3rd opto-electronic receiver
Pipe, first photoelectric receiving tube, second photoelectric receiving tube, the orientation of the 3rd photoelectric receiving tube swash with described
The light path of optical diode transmitting laser is vertical；
Step (3)：After the laser diode is opened, using first photoelectric receiving tube, second photoelectric receiving tube,
3rd photoelectric receiving tube receives the laser scattered by the concavees lens that the laser diode sends, by processing mould
Block calculates the luminous power P1 that the first photoelectric receiving tube detection is obtained, the light work(that the second photoelectric receiving tube detection is obtained
Rate P2, the luminous power P3 that the 3rd photoelectric receiving tube detection is obtained；
Step (4)：When the processing module calculates first photoelectric receiving tube, second photoelectric receiving tube, the described 3rd
When the luminous power that photoelectric receiving tube detection is obtained starts to reduce, the decay light work(that the first photoelectric receiving tube detection is obtained is recorded
Rate Pr1, the decay luminous power Pr2 that the second photoelectric receiving tube detection is obtained, what the 3rd photoelectric receiving tube detection was obtained
Decay luminous power Pr3；
Step (5)：First photoelectric receiving tube, second photoelectric receiving tube, described the are calculated by the processing module
The attenuation coefficient that each Autonomous test of three photoelectric receiving tubes is obtained, K1 is denoted as by the attenuation coefficient of first photoelectric receiving tube, described
The attenuation coefficient of the second photoelectric receiving tube is denoted as K2, and the attenuation coefficient of the 3rd photoelectric receiving tube is denoted as K3, K1=Pr1/P1,
K2=Pr2/P2, K3=Pr3/P3；
Step (6)：First photoelectric receiving tube, second photoelectric receiving tube, described the are calculated by the processing module
The concentration of the thing to be detected that each Autonomous test of three photoelectric receiving tubes is obtained, the thing to be detected that the first photoelectric receiving tube detection is obtained
Concentration be PMr1, the concentration of the thing to be detected that second photoelectric receiving tube detection is obtained is PMr2, and the 3rd photoelectricity connects
The concentration of the thing to be detected that closed tube detection is obtained is PMr3；
Step (7)：First photoelectric receiving tube, second photoelectric receiving tube, described the are calculated by the processing module
The detection correction value of the concentration of the thing to be detected that each Autonomous test of three photoelectric receiving tubes is obtained, the detection of first photoelectric receiving tube
Correction value is PMc1, PMc1=PMr1/K1, and the detection correction value of second photoelectric receiving tube is PMc2, PMc2=PMr2/
K2, the detection correction value of the 3rd photoelectric receiving tube is PMc3, PMc3=PMr3/K3；
Step (8)：Average detected correction value is calculated by the processing module, the average detected correction value is denoted as PMc0,
PMc0=(PMc1+PMc2+PMc3)/3.
2. the autonomous modification method of laser diode power according to claim 1, it is characterised in that first photoelectricity connects
Place is respectively provided with second photoelectric receiving tube, the 3rd photoelectric receiving tube at equal intervals for the both sides of closed tube.
3. the autonomous modification method of laser diode power according to claim 1, it is characterised in that the thing to be detected is
Gas or little particle in air ambient.
4. the autonomous modification method of laser diode power according to claim 1, it is characterised in that the pole of the laser two
Pipe, the concavees lens, the key light overlapping of axles of the orientation of first photoelectric receiving tube and the concavees lens.
5. the application method of the autonomous modification method of laser diode power according to claim 1, it is characterised in that described
After first photoelectric receiving tube, second photoelectric receiving tube, the 3rd photoelectric receiving tube receive the laser, turned using photoelectricity
Change circuit and optical power signals are converted into power electric signal, recycle the photoelectric conversion circuit to send the power electric signal
To the processing module.
6. the application method of the autonomous modification method of laser diode power according to claim 1, it is characterised in that described
Scattered in first photoelectric receiving tube, second photoelectric receiving tube, the 3rd photoelectric receiving tube reception laser
After laser, convert optical signals to scatter electric signal using photoelectric conversion circuit, recycle the photoelectric conversion circuit described
Scattering electric signal is sent to the processing module.
7. the application method of the autonomous modification method of laser diode power according to claim 1, it is characterised in that described
In step (3), after the laser diode starts, the processing module real-time continuous calculate first photoelectric receiving tube, institute
The second photoelectric receiving tube, the 3rd photoelectric receiving tube luminous power that obtains of detection are stated, when first photoelectric receiving tube, described
When the luminous power that second photoelectric receiving tube, the 3rd photoelectric receiving tube detection are obtained tends towards stability, then the laser two is assert
Pole pipe enters stable state, first photoelectric receiving tube, second photoelectric receiving tube under start recording stable state, institute
State the luminous power that the detection of the 3rd photoelectric receiving tube is obtained, i.e. P1, P2, P3.
8. the application method of the autonomous modification method of laser diode power according to claim 1, it is characterised in that described
Method also includes step (9)：When K1, K2, K3 any two are less than 60%, the processing module recognizes the laser diode
In abnormality.
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