CN113984607A - Light path calibration method, device and system based on transmission method dust meter - Google Patents
Light path calibration method, device and system based on transmission method dust meter Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 111
- 239000000428 dust Substances 0.000 title claims abstract description 56
- 230000005540 biological transmission Effects 0.000 title claims abstract description 55
- 230000003287 optical effect Effects 0.000 claims abstract description 95
- 238000009434 installation Methods 0.000 claims abstract description 8
- 238000012545 processing Methods 0.000 claims description 26
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- 239000004071 soot Substances 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 2
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- 230000007547 defect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000005250 beta ray Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
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- 238000005259 measurement Methods 0.000 description 1
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- 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
- 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
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Abstract
The invention provides a method, equipment and a system for calibrating an optical path based on a transmission method dust meter, wherein the method for calibrating the optical path based on the transmission method dust meter comprises the following steps: driving a light source to emit a light beam; collecting an electric signal correspondingly generated by an optical signal returned by the light source through the optical path; the light path comprises an emission mirror surface for collimating the light beam and a reflection mirror surface for reflecting and focusing; analyzing the deviation degree of the electric signal and a preset calibration voltage; and displaying the deviation degree. The invention can visually present the calibration state of the light path to an installer, and the installer only needs to observe the deviation information displayed by the screen to know the deviation degree in the installation process so as to determine whether the light path is calibrated, thereby reducing the installation difficulty and danger of operators.
Description
Technical Field
The invention belongs to the technical field of light path calibration, relates to a light path calibration method, and particularly relates to a light path calibration method, device and system based on a transmission method dust meter.
Background
At present, the main modes applied to the on-line monitoring of smoke particles discharged by smoke of a fixed pollution source include an optical transmission method, an optical scattering method, a contact charge method and the like, and an extraction type beta-ray method and the like. Among various dust meters for measuring the concentration of dust particles, the optical transmission method has the advantages of convenience in use, low maintenance cost, high precision of high-concentration dust measurement and the like, and is a priority type for online monitoring of dust concentration by flue gas.
The traditional transmission method dust meter adopts a method in the process of light path calibration, which mainly utilizes the reflection principle of light to judge, namely, the light is emitted from an emitting end and then is focused to human eyes through an eyepiece to be observed and identified through a reflector.
Therefore, how to provide a method, a device and a system for calibrating an optical path based on a transmission method dust meter to solve the defects that the prior art cannot provide a simple, intuitive and safer way to assist an installer in calibrating the optical path, and the like, is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above drawbacks of the prior art, an object of the present invention is to provide a method, an apparatus and a system for calibrating an optical path based on a transmission method dust meter, so as to solve the problem that the prior art cannot provide a simple, intuitive and safer way to assist an installer in calibrating an optical path.
In order to achieve the above and other related objects, an aspect of the present invention provides a method for calibrating an optical path based on a transmission method dust meter, including: driving a light source to emit a light beam; collecting an electric signal correspondingly generated by an optical signal returned by the light source through the optical path; the light path comprises an emission mirror surface for collimating the light beam and a reflection mirror surface for reflecting and focusing; analyzing the deviation degree of the electric signal and a preset calibration voltage; and displaying the deviation degree.
In an embodiment of the invention, the preset calibration voltage is a voltage value acquired every preset distance in a simulation test process by using the light source to calibrate the optical path on the optical platform before the optical path calibration method is applied to an installation site.
In an embodiment of the invention, at the same time of the step of displaying the deviation degree, the method for calibrating the light path based on the transmission method dust meter further includes: and displaying the electric signal and the preset calibration voltage.
In an embodiment of the invention, after the step of analyzing the deviation degree between the electrical signal and a preset calibration voltage, the method for calibrating the light path based on the transmission method dust meter further includes: generating a light source emission angle adjusting instruction according to the deviation degree; and adjusting the emission angle of the light source based on the light source emission angle adjusting instruction.
In an embodiment of the invention, after the step of adjusting the emission angle of the light source, the method for calibrating the light path based on the transmission-type dust meter further includes: continuously acquiring an electric signal generated by the light source corresponding to the optical signal returned by the light path, and analyzing the deviation degree of the electric signal and the preset calibration voltage; and continuously adjusting the emission angle of the light source according to the variation trend of the deviation degree, and reducing the deviation degree until the light path calibration requirement is met.
In an embodiment of the invention, the optical path calibration requirement indicates that a deviation degree between the electrical signal and a preset calibration voltage is within a preset range.
To achieve the above and other related objects, another aspect of the present invention provides an optical path calibration apparatus, comprising: a processor and a memory; the memory is used for storing a computer program, and the processor is used for executing the computer program stored by the memory so as to enable the optical path calibration equipment to execute the optical path calibration method based on the transmission method dust meter.
To achieve the above and other related objects, a final aspect of the present invention provides a light path calibration system based on a transmission method dust meter, including: the optical path device and the optical path calibration equipment; the light path device comprises an emission mirror surface for collimating the light beam and a reflection mirror surface for reflecting and focusing; the light path calibration equipment comprises a light source transmitting unit, a light source receiving unit, a signal processing unit and a data display unit; the signal processing unit sends a driving signal to the light source emission unit; the light source emission unit drives the light source to emit light beams according to the driving signal; the light beam is collimated through the emission mirror surface and is focused on the light source receiving unit through the reflection mirror surface to generate an electric signal; the light source receiving unit transmits the electric signal to the signal processing unit; the signal processing unit analyzes the deviation degree of the electric signal and a preset calibration voltage; sending the deviation degree to the data display unit; the data display unit displays the deviation degree.
In an embodiment of the invention, the light source emitting unit includes a light source driving circuit and an LED cold light source; the light source driving circuit drives the LED cold light source to emit light beams according to the driving signal; the light source receiving unit comprises a photoelectric conversion circuit and a photodiode; the photoelectric diode converts the optical signal focused by the reflector into the electric signal, and the photoelectric conversion circuit performs filtering amplification processing on the electric signal; the signal processing unit comprises a main control module and an ADC (analog to digital converter) acquisition module; the ADC acquisition module converts the analog electric signal into a digital electric signal and transmits the digital electric signal to the main control module, and the main control module analyzes the deviation degree of the electric signal and a preset calibration voltage; and sending the deviation degree to the data display unit.
In an embodiment of the present invention, the optical path calibration system based on the transmission method dust meter further includes: an angle adjusting unit; the angle adjusting unit is connected with the light source emitting unit; the signal processing unit generates a light source emission angle adjusting instruction according to the deviation degree and sends the light source emission angle adjusting instruction to the angle adjusting unit; the angle adjusting unit drives the light source emitting unit to move based on the light source emitting angle adjusting instruction, and the emitting angle of the light source is adjusted.
As described above, the method, the device and the system for calibrating the optical path based on the transmission method dust meter have the following advantages:
the invention utilizes the photoelectric detector to calibrate the light path, and the signal processing unit acquires the voltage information converted by the intensity of the received light source to judge whether the light path of the system is calibrated or not, and an installer only needs to observe the deviation information displayed by a screen to know the deviation degree in the installation process so as to determine whether the light path is calibrated or not, thereby reducing the installation difficulty and the danger of operators.
Drawings
Fig. 1 is a schematic flow chart illustrating a method for calibrating an optical path based on a transmission-method dust meter according to an embodiment of the present invention.
Fig. 2 is a flowchart illustrating an angle adjustment method of the optical path calibration method based on the transmission method soot instrument according to an embodiment of the present invention.
Fig. 3 is a schematic structural connection diagram of an optical path calibration apparatus according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of an optical path calibration system based on a transmission method dust meter according to an embodiment of the present invention.
Fig. 5 is a schematic diagram illustrating an application of the optical path calibration system based on the transmission method dust meter in an embodiment of the invention.
Description of the element reference numerals
1 Signal processing unit
11 ARM module
12 ADC acquisition module
2 light source emission unit
21 light source driving circuit
22 LED white cold light source
3 data display unit
4 light source receiving unit
41 photoelectric conversion circuit
42 Photodiode (PD)
5 optical path device
51 emission mirror
52 receiving mirror
S11-S16
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the drawings only show the components related to the present invention rather than the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
The light path calibration method, the device and the system based on the transmission method dust meter can intuitively present the light path calibration state to an installer, and the installer only needs to observe the deviation information displayed on a screen to know the deviation degree in the installation process so as to determine whether the light path is calibrated or not, so that the installation difficulty and the danger of operators are reduced.
The principle and implementation of the method, apparatus and system for calibrating an optical path based on a transmission method dust meter according to the present embodiment will be described in detail below with reference to fig. 1 to 5, so that those skilled in the art can understand the method, apparatus and system for calibrating an optical path based on a transmission method dust meter without creative work.
Referring to fig. 1, a schematic flow chart of an embodiment of a method for calibrating an optical path based on a transmission method soot analyzer according to the present invention is shown. As shown in fig. 1, the optical path calibration method based on the transmission method dust meter specifically includes the following steps:
and S11, driving the light source to emit light beams.
In particular, the Light source may be a LED (Light-Emitting Diode) cold Light source, preferably an LED white cold Light source.
S12, collecting an electric signal generated correspondingly by an optical signal returned by the light source through the optical path; the optical path includes an emission mirror surface for collimating the light beam and a reflection mirror surface for reflection and focusing.
Specifically, a light beam emitted by the LED cold light source is first collimated by the emission mirror, and then is reflected by the emission mirror and focused on a PD (photo detector or photodiode).
And S13, analyzing the deviation degree of the electric signal and the preset calibration voltage.
In an embodiment, the preset calibration voltage is a voltage value acquired at intervals of a preset distance in a simulation test process when the light path calibration method is applied to an installation site and the light path calibration is performed on an optical platform by using the light source.
Specifically, the preset calibration voltage is a preset maximum value, defined as Umax, the whole optical path calibration system based on the transmission method dust meter is placed on an optical platform for optical path calibration, the voltage value collected by an ADC (Analog-to-digital converter) collection module is recorded at intervals of 0.5m or other reasonable preset distances, and then the voltage value is written into a main control module, such as an ARM (Advanced RISC Machines, RISC microprocessor) module. The optical platform refers to a detection platform simulating a field environment.
And S14, displaying the deviation degree.
In an embodiment, in step S14, the method for calibrating an optical path based on a transmission-method soot analyzer further includes: and displaying the electric signal and the preset calibration voltage.
It should be noted that the display of the deviation degree in the present invention includes a deviation degree value or any comparison information that can intuitively obtain the deviation degree. For example, if the electrical signal is a voltage value U, and the preset calibration voltage is Umax, the displayed deviation degree may be a difference value between U and Umax, or two values of U and Umax may be displayed separately, or may be displayed in various statistical chart forms, for example, U represents a first histogram, Umax represents a second histogram, and the deviation degree may be directly known by a difference between the heights of the two histograms, or "the deviation degree changes or the deviation degree increases" may be indicated by text. Furthermore, the angle adjustment direction of the next step can be displayed so as to guide an installer to finish the light path calibration work more quickly. For example, after the deviation degrees of two consecutive times become smaller, the angle adjustment direction of the next step is displayed to the installer as the same direction adjustment; and after the deviation degrees of the two successive times are increased, displaying the next angle adjustment direction to the installer as the opposite direction adjustment or displaying corresponding prompt information according to the functional relation between the deviation degree change and the light source emission angle.
In practical application, a bias voltage exists in the light path calibration process, when the light beam completely deviates from the reflecting mirror surface, the acquired voltage is the bias voltage Ubios of the system, and since the bias voltage exists in both U and Umax, the comparison between the U-Ubios and the Umax-Ubios has no great influence, namely the deviation between the U-Ubios and the Umax-Ubios.
Fig. 2 is a flowchart illustrating an angle adjustment method of the optical path calibration method based on the transmission method soot instrument according to an embodiment of the present invention. As shown in fig. 2, after step S13, the optical path calibration method based on the transmission method dust meter further includes the following steps:
and S15, generating a light source emission angle adjusting instruction according to the deviation degree.
Therefore, the light path calibration can display the deviation degree to an installer, assist the installer to complete manual adjustment of the light source emission angle more quickly and safely, and can automatically send out an adjustment instruction according to the analysis of the deviation degree to realize the automatic completion of the light path calibration process.
And S16, adjusting the emission angle of the light source based on the light source emission angle adjusting instruction.
In an embodiment, after the step of adjusting the emission angle of the light source, the method for calibrating the light path based on the transmission-type dust meter further includes:
continuously acquiring an electric signal generated by the light source corresponding to the optical signal returned by the light path, and analyzing the deviation degree of the electric signal and the preset calibration voltage;
and continuously adjusting the emission angle of the light source according to the variation trend of the deviation degree, and reducing the deviation degree until the light path calibration requirement is met.
Therefore, by continuously adjusting the reacquisition process, the whole method forms closed-loop feedback until the light path calibration is completed.
In an embodiment, the optical path calibration requirement indicates that a deviation degree between the electrical signal and a preset calibration voltage is within a preset range.
Specifically, the preset range may be a voltage difference of a few tenths of a millivolt or other range values reasonably set according to installation calibration requirements.
The protection scope of the method for calibrating the optical path based on the transmission method dust meter is not limited to the execution sequence of the steps listed in the embodiment, and all the solutions of adding, subtracting and replacing the steps in the prior art according to the principle of the invention are included in the protection scope of the invention.
Fig. 3 is a schematic structural connection diagram of an optical path calibration apparatus according to an embodiment of the present invention. As shown in fig. 3, this embodiment provides an optical path calibration apparatus, which specifically includes: a processor and a memory; the memory is used for storing a computer program, and the processor is used for executing the computer program stored by the memory so as to enable the optical path calibration equipment to execute the steps of the optical path calibration method based on the transmission method dust meter.
The Processor may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the Integrated Circuit may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete gate or transistor logic device, discrete hardware component.
The Memory may include a Random Access Memory (RAM), and may further include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory.
Specifically, the signal processing unit in the optical path calibration device comprises a processor and a memory; the memory is used for storing a computer program, and the processor is used for executing the computer program stored by the memory so as to enable the optical path calibration equipment to execute the steps of the optical path calibration method based on the transmission method dust meter.
Fig. 4 is a schematic structural diagram of an optical path calibration system based on a transmission method dust meter according to an embodiment of the present invention. As shown in fig. 4, the optical path calibration system based on the transmission method dust meter of the present invention includes: an optical path device 5 and the optical path calibration equipment; the optical path calibration device comprises a signal processing unit 1, a light source transmitting unit 2, a data display unit 3 and a light source receiving unit 4; the optical path means 5 comprises an emission mirror 51 for collimating the light beam and a reflection mirror 52 for reflection and focusing.
The signal processing unit 1 sends a driving signal to the light source emitting unit 2.
The light source emitting unit 2 drives the light source to emit light beams according to the driving signal.
The light beam is collimated by the emitting mirror 51, and focused on the light source receiving unit 4 through the reflecting mirror 52 to generate an electric signal.
The light source receiving unit 4 transmits the electrical signal to the signal processing unit 1.
The signal processing unit 1 analyzes the degree of deviation between the electric signal and a preset calibration voltage; the degree of deviation is sent to the data display unit 3.
The data display unit 3 displays the degree of deviation.
Fig. 5 is a schematic diagram illustrating an application of the optical path calibration system based on the transmission method soot analyzer in an embodiment of the present invention. As shown in fig. 5, a specific structure or component of each unit in the optical path calibration system based on the transmission method dust meter is presented.
The light source emission unit 2 comprises a light source driving circuit 21 and an LED cold light source 22; the light source driving circuit 21 drives the LED cold light source 22 to emit a light beam according to the driving signal.
The light source receiving unit 4 includes a photoelectric conversion circuit 41 and a photodiode 42; the photodiode 42 converts the optical signal focused by the mirror surface into the electrical signal, and the photoelectric conversion circuit 41 performs filtering and amplification processing on the electrical signal.
The signal processing unit 1 comprises a main control module 11 and an ADC acquisition module 12; the ADC acquisition module 12 converts the analog electrical signal into a digital electrical signal, and transmits the digital electrical signal to the main control module 11, and the main control module 11 analyzes the deviation degree between the electrical signal and a preset calibration voltage; and sending the deviation degree to the data display unit. For example, the main control module may be an ARM module or any one of a single chip microcomputer and a microprocessor capable of performing a deviation degree analysis function.
In an embodiment, the optical path calibration system based on the transmission method dust meter further includes: an angle adjusting unit.
The angle adjusting unit is connected with the light source emitting unit 2.
And the signal processing unit generates a light source emission angle adjusting instruction according to the deviation degree and sends the light source emission angle adjusting instruction to the angle adjusting unit.
The angle adjusting unit drives the light source emitting unit to move based on the light source emitting angle adjusting instruction, and the emitting angle of the light source is adjusted.
The principle of the optical path calibration system based on the transmission method dust meter corresponds to the optical path calibration method based on the transmission method dust meter one to one, and the optical path calibration system based on the transmission method dust meter can realize the optical path calibration method based on the transmission method dust meter, but the realization device of the optical path calibration method based on the transmission method dust meter includes but is not limited to the structure of the optical path calibration system based on the transmission method dust meter, which is listed in the embodiment, and all structural deformation and replacement of the prior art, which are made according to the principle of the invention, are included in the protection scope of the invention.
In summary, the method, the device and the system for calibrating the light path based on the transmission method dust meter utilize the photoelectric detector to calibrate the light path, the signal processing unit acquires the voltage information converted from the intensity of the received light source to judge whether the light path of the system is calibrated, and an installer only needs to observe the deviation information displayed on the screen to know the deviation degree in the installation process to determine whether the light path is calibrated, so that the installation difficulty and the danger of operators are reduced. The invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A method for calibrating an optical path based on a transmission method dust meter is characterized by comprising the following steps:
driving a light source to emit a light beam;
collecting an electric signal correspondingly generated by an optical signal returned by the light source through the optical path; the light path comprises an emission mirror surface for collimating the light beam and a reflection mirror surface for reflecting and focusing;
analyzing the deviation degree of the electric signal and a preset calibration voltage;
and displaying the deviation degree.
2. The optical path calibration method based on the transmission method dust meter as claimed in claim 1, characterized in that:
the preset calibration voltage is a voltage value acquired at preset intervals in the simulation test process by using the light source to calibrate the light path on the optical platform before the light path calibration method is applied to an installation site.
3. The method for calibrating an optical path based on a transmission dust meter according to claim 1, wherein the step of displaying the deviation degree further comprises:
and displaying the electric signal and the preset calibration voltage.
4. The method for calibrating an optical path based on a transmission method dust meter according to claim 1, wherein after the step of analyzing the degree of deviation between the electrical signal and a preset calibration voltage, the method for calibrating an optical path based on a transmission method dust meter further comprises:
generating a light source emission angle adjusting instruction according to the deviation degree;
and adjusting the emission angle of the light source based on the light source emission angle adjusting instruction.
5. The method for calibrating an optical path based on a transmission dust meter according to claim 4, wherein after the step of adjusting the emission angle of the light source, the method for calibrating an optical path based on a transmission dust meter further comprises:
continuously acquiring an electric signal generated by the light source corresponding to the optical signal returned by the light path, and analyzing the deviation degree of the electric signal and the preset calibration voltage;
and continuously adjusting the emission angle of the light source according to the variation trend of the deviation degree, and reducing the deviation degree until the light path calibration requirement is met.
6. The optical path calibration method based on the transmission method dust meter, according to claim 5, is characterized in that:
the light path calibration requirement means that the deviation degree of the electric signal and a preset calibration voltage is within a preset range.
7. An optical path calibration apparatus, comprising: a processor and a memory;
the memory is used for storing a computer program, and the processor is used for executing the computer program stored by the memory to enable the optical path calibration equipment to execute the optical path calibration method based on the transmission method dust meter according to any one of claims 1 to 6.
8. An optical path calibration system based on a transmission method dust meter is characterized by comprising the following components: an optical path device and an optical path calibration apparatus as claimed in claim 7; the light path device comprises an emission mirror surface for collimating the light beam and a reflection mirror surface for reflecting and focusing; the light path calibration equipment comprises a light source transmitting unit, a light source receiving unit, a signal processing unit and a data display unit;
the signal processing unit sends a driving signal to the light source emission unit;
the light source emission unit drives the light source to emit light beams according to the driving signal;
the light beam is collimated through the emission mirror surface and is focused on the light source receiving unit through the reflection mirror surface to generate an electric signal;
the light source receiving unit transmits the electric signal to the signal processing unit;
the signal processing unit analyzes the deviation degree of the electric signal and a preset calibration voltage; sending the deviation degree to the data display unit;
the data display unit displays the deviation degree.
9. The optical path calibration system based on the transmission method dust meter as claimed in claim 8, wherein:
the light source emission unit comprises a light source driving circuit and an LED cold light source; the light source driving circuit drives the LED cold light source to emit light beams according to the driving signal;
the light source receiving unit comprises a photoelectric conversion circuit and a photodiode; the photoelectric diode converts the optical signal focused by the reflector into the electric signal, and the photoelectric conversion circuit performs filtering amplification processing on the electric signal;
the signal processing unit comprises a main control module and an ADC (analog to digital converter) acquisition module; the ADC acquisition module converts the analog electric signal into a digital electric signal and transmits the digital electric signal to the main control module, and the main control module analyzes the deviation degree of the electric signal and a preset calibration voltage; and sending the deviation degree to the data display unit.
10. The optical path calibration system based on the transmission method dust meter as claimed in claim 8, further comprising: an angle adjusting unit;
the angle adjusting unit is connected with the light source emitting unit;
the signal processing unit generates a light source emission angle adjusting instruction according to the deviation degree and sends the light source emission angle adjusting instruction to the angle adjusting unit;
the angle adjusting unit drives the light source emitting unit to move based on the light source emitting angle adjusting instruction, and the emitting angle of the light source is adjusted.
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