Beta-ray particulate matter sampling spot auxiliary visual judgment system

Abstract

The utility model belongs to the technical field of beta-ray particulate matter identification. The utility model provides a beta-ray particulate matter sampling spot auxiliary visual judgment device. The beta-ray particulate matter sampling spot auxiliary visual judgment device comprises a paper tape wheel, a tensioning wheel, a paper collecting wheel, a beta detector, a C14 source pressure head, an I-type visual sensor, an I-type visual sensor, a sliding block with a guide rail, a photoelectric switch, an air inlet pipe and a filter paper tape. The utility model aims to solve the problem of online judgment of abnormal data of an existing beta-ray particulate matter online monitoring system, improve the checking capability of the abnormal data of particulate matters, reduce the operation and maintenance fault processing times, provide real particulate matter judgment capability and improve the accuracy of the abnormal data of the particulate matters. And the judgment of abnormal data of the particulate matter concentration caused by instrument problems or actual conditions cannot be determined is reduced.

Description

Technical Field

[0001] This invention belongs to the field of beta-ray particulate matter identification technology. Background Technology

[0002] Traditional beta-ray particulate matter monitoring systems use filter paper strips to enrich particulate matter, and calculate the particulate matter concentration by detecting the C14 electron beam energy of clean and sampled filter paper using a beta detector. In practical applications, various factors can cause data anomalies, resulting in sudden increases or decreases. Because monitoring stations are often geographically dispersed, it is difficult to determine whether such sudden data changes are true or abnormal, requiring personnel to visit the sampling sites for verification.

[0003] Traditional beta-ray particulate matter monitors use encoder signals to control the distance of paper tape spots. The rotation of the paper tape drives the encoder, and the distance the paper tape spots move is determined by the encoder's rotation angle. The main control circuit board then controls the take-up motor to stop the paper tape, thus determining the paper tape's position. In practical applications, paper tape spot control may fail due to overall paper tape looseness or encoder malfunction, resulting in inconsistent and fluctuating spot movement distances.

[0004] Traditional particulate matter monitors use encoders to determine paper tape breaks. If the paper tape moves and the encoder receives no signal, it is considered a paper tape break, and the equipment stops operating. However, considering that a loose paper tape or encoder malfunction could cause the encoder to fail to receive a signal, incorrectly determining a paper tape break, equipment shutdown would disrupt operation.

[0005] In traditional beta-ray particulate matter monitors, the paper tape usage depends entirely on the estimation and judgment of maintenance personnel based on the on-site conditions. Due to the dispersed locations of the monitoring stations, the paper tape often runs out, and maintenance personnel then have to go to the site to replace it, affecting the continuity of data. Summary of the Invention

[0006] In view of this, the present invention provides an auxiliary visual determination method for β-ray particulate matter sampling spots, comprising: a paper tape wheel, a tension wheel, a take-up wheel, a β detector, a C14 source pressure head, a type I visual sensor, a type II visual sensor, a guide rail slider, a photoelectric switch, an air inlet pipe, and a filter paper tape. The paper tape wheel is used to mount blank paper tape; the tension wheel is used to support and tighten the paper tape; the take-up wheel is used to collect the collected paper tape; the C14 source pressure head is used to release a β-ray electron beam; the type I visual sensor is located to the right of the C14 source pressure head and is used to photograph the sampling spots on the enriched paper tape; the type II visual sensor is used to inspect the blank paper tape before sampling, and simultaneously works with the guide rail slider to move above the paper tape wheel to photograph the blank paper tape to determine the amount of paper tape and the usage time; the guide rail slider is used to move the type II visual sensor above the paper tape wheel; the photoelectric switch is used to determine the position of the type II visual sensor; the air inlet pipe is used to collect ambient air particulate matter onto the filter paper tape, and the filter paper tape is used for particulate matter enrichment.

[0007] Furthermore, the Type I vision sensor, in conjunction with the paper tape spots, performs sampling and judgment. The position of the sampling spots determines the distance the paper tape has traveled. As the take-up roller moves the paper tape, the Type I vision sensor acquires image signals of the paper tape. When a complete circular pattern is captured at the center, the Type I vision sensor transmits the signal to the control system. The control system then stops the take-up roller, thus determining the distance the paper tape has traveled.

[0008] Furthermore, the Type II vision sensor inspects blank paper tapes and periodically moves above the paper tape wheel via a guide rail slider and photoelectric switch. By collecting the thickness of the paper tape, it determines the remaining lifespan of the paper tape.

[0009] The purpose of this invention is to solve the problem of online judgment of abnormal data in existing beta-ray particulate matter online monitoring systems, improve the ability to review abnormal particulate matter data, reduce the number of maintenance fault handling operations, provide a true particulate matter discrimination capability, reduce the judgment of abnormal particulate matter concentration data due to the inability to determine whether it is caused by instrument problems or actual conditions, and reduce the maintenance work of maintenance personnel.

[0010] The purpose of this invention is to solve the problem of uneven paper tape spots in existing beta-ray particulate matter online monitoring systems, eliminate the traditional encoder structure, and precisely control the spot movement distance of the particulate matter paper tape.

[0011] The purpose of this invention is to solve the problem of equipment shutdown caused by the existing encoder detecting paper tape breakage. The encoder structure is eliminated, and a vision sensor module is used to determine the thickness of the paper tape and its remaining service life. The service life is displayed on the instrument and simultaneously sent to the management personnel to remind the equipment maintenance unit to replace the paper tape in a timely manner.

[0012] The main technical advantage of this invention lies in its ability to trace the source of a sample spot. By analyzing the enriched substances on the spot, it determines whether the current data anomaly is genuine. For example, the presence of foreign objects in the sampling spot can cause a sudden increase in concentration, which traditional particulate matter instruments cannot detect. Similarly, if the sampling spot is uneven or the sampling pump suddenly stops during the collection process, the spot image will also show low values. If the sampling spot is deep and the particulate matter concentration is very low, or if the sampling spot is shallow and the concentration is very high, it indicates an instrument malfunction.

[0013] The significant technical advantage of this invention lies in its ability to eliminate the encoder structure and utilize a vision sensor module to achieve more precise movement distance control through the acquisition of speckle images.

[0014] The significant technical advantage of this invention lies in eliminating the encoder structure and using a vision sensor module. By acquiring images from the vision sensor, the thickness of the paper tape on the paper tape pulley is collected, and the remaining service life of the paper tape is determined based on the thickness, thereby improving the intelligence level of the particulate matter meter. Attached Figure Description

[0015] Figure 1 This is a diagram of a visual aid system for identifying beta-ray particulate matter sampling spots.

[0016] Figure 2 This is a top view of a beta-ray particulate matter sampling spot-assisted visual determination system.

[0017] Among them, 1 is the paper belt pulley, 2 is the tensioning pulley, 3 is the take-up pulley, 4 is the β detector, 5 is the C14 source pressure head, 6 is the type I vision sensor, 7 is the type II vision sensor, 8 is the slider with guide rail, 9 is the photoelectric switch, 10 is the air inlet pipe, and 11 is the filter paper belt. Detailed Implementation

[0018] Beta-ray absorption principle: Beta particles (i.e., electrons) emitted from a C14 radioactive source have strong penetrating power. When they pass through an absorbing material of a certain thickness, their intensity gradually decreases as the thickness of the absorbing layer increases. The attenuation of low-energy beta rays depends only on the mass of the absorbing material and is independent of other physical properties of the absorbing material.

[0019] Filter paper tape: refers to the carrier used by the instrument to enrich the collected particulate matter during measurement.

[0020] Sampling spot: During instrument measurement, particulate matter forms a circular particulate matter enrichment spot at the enrichment location of the paper tape. The concentration of particulate matter is calculated by measuring the intensity of the β-ray electron beam before and after sampling using a detector.

[0021] β detector: β rays enter the plastic scintillator through the shielding window and interact with it, exciting the molecules of the plastic scintillator; when the molecules de-excite, they emit fluorescent photons; the fluorescent photons are converted into electrons by the photomultiplier tube and amplified, outputting a current pulse; this pulse is amplified, shaped, and discriminated before outputting a standard TTL signal.

[0022] C14 radioactive source: emits a low-energy beta-ray electron beam.

[0023] Visual recognition sensor: It performs real-time image acquisition according to a specific program, analyzes and processes the acquired images, transmits and stores them, and makes judgments, marking non-compliant images and sending them to the required platform.

[0024] Visual imaging paper feeding scheme: In the particulate matter monitoring instrument, the take-up roller drives the paper belt to move. The type I visual sensor detects the movement of the sampling spot. When the sampling spot moves to the center position of the time sensor, the position is determined. The visual sensor sends a signal to the control terminal. The control terminal sends a signal to stop the take-up roller from rotating, the pressure head drops, and the movement distance of the sampling spot is confirmed, thus accurately controlling the movement distance of the sampling spot.

[0025] Visual imaging method for determining paper tape remaining balance: In particulate matter monitoring instruments, the remaining paper tape is periodically assessed, typically once a week. A guide rail slider moves a Type II visual sensor towards the paper tape, stopping at the photoelectric switch position. The Type II visual sensor module then acquires an image of the paper tape. Based on the acquired image, an internal algorithm model analyzes the image to calculate the remaining lifespan of the paper tape, storing this information in the instrument. When the remaining paper tape is low, a signal is sent to the equipment management unit, notifying maintenance personnel to prepare paper tape for replacement. Example

[0026] The purpose of this invention is to solve the problem of online judgment of abnormal data in existing beta-ray particulate matter online monitoring systems, improve the ability to review abnormal particulate matter data, reduce the number of maintenance fault handling operations, provide a true particulate matter discrimination capability, reduce the judgment of abnormal particulate matter concentration data due to the inability to determine whether it is caused by instrument problems or actual conditions, and reduce the maintenance work of maintenance personnel.

[0027] The purpose of this invention is to solve the problem of uneven paper tape spots in existing beta-ray particulate matter online monitoring systems, eliminate the traditional encoder structure, and precisely control the spot movement distance of the particulate matter paper tape.

[0028] The purpose of this invention is to solve the problem of equipment shutdown caused by the existing encoder detecting paper tape breakage. The encoder structure is eliminated, and a vision sensor module is used to determine the thickness of the paper tape and its remaining service life. The service life is displayed on the instrument and simultaneously sent to the management personnel to remind the equipment maintenance unit to replace the paper tape in a timely manner.

[0029] The core of this invention lies in adding an image acquisition unit to the traditional beta-ray particulate matter monitoring system. Through the image acquisition unit, images of sampling spots are acquired, and through image processing, the abnormal values ​​are analyzed and determined to be caused by foreign objects falling, paper tape breakage, or sampling failure resulting in no sampling spots. This plays a key role in tracing the source of abnormal particulate matter.

[0030] The core of this invention lies in adding an image acquisition unit to the traditional beta-ray particulate matter monitoring system. Through the image acquisition unit, images of the sampling spots are acquired, and through image processing, more precise control of the movement distance is achieved.

[0031] The core of this invention lies in adding a visual sensor module to the traditional beta-ray particulate matter monitoring system. By acquiring images from the visual sensor, the thickness of the paper tape on the paper tape pulley is collected. Based on the thickness determination, the remaining service life of the paper tape is determined, thereby improving the intelligence level of the particulate matter instrument.

[0032] This invention provides an auxiliary visual determination method for β-ray particulate matter sampling spots, comprising: a paper belt wheel, a tension wheel, a take-up wheel, a β detector, a C14 source pressure head, a type I visual sensor, a type II visual sensor, a slider with guide rail, a photoelectric switch, an air inlet pipe, and a filter paper belt.

[0033] The paper tape wheel is used to install blank paper tape.

[0034] The tensioning wheel is used to support and tighten the paper tape.

[0035] The paper collection wheel is used to collect the collected paper strips.

[0036] The C14 source pressure head is used to release a beta-ray electron beam.

[0037] The Type I vision sensor is located on the right side of the C14 source pressure head and is used to capture sampling spots on the enriched paper tape.

[0038] The Type II vision sensor is located to the left of the C14 source pressure head and is used to inspect blank paper tape before sampling. At the same time, it moves with a guide rail slider above the paper tape wheel to take pictures of the blank paper tape to determine the amount of paper tape and the usage time.

[0039] The guide rail slider is fixed above the Type II vision sensor and is used to move the Type II vision sensor above the paper tape wheel.

[0040] The photoelectric switch is fixed near the Type II vision sensor and is used to determine the position of the Type II vision sensor.

[0041] The air intake pipe is used to collect ambient air particulate matter onto the filter paper tape.

[0042] The filter paper strip is used for the enrichment of particulate matter.

[0043] Furthermore, the Type I vision sensor, in conjunction with the paper tape spots, performs sampling and judgment. The position of the sampling spots determines the paper tape's travel distance. As the take-up roller moves the paper tape, the Type I vision sensor acquires image signals of the paper tape. When a complete circular pattern is captured at the center, the Type I vision sensor transmits the signal to the control system. The control system then stops the take-up roller, thus determining the paper tape's travel distance.

[0044] Furthermore, the Type II vision sensor inspects blank paper tapes and periodically moves above the paper tape wheel via a guide rail slider and photoelectric switch. By collecting the thickness of the paper tape, it determines the remaining lifespan of the paper tape.

[0045] The working method of this utility model:

[0046] 1. Ambient air particulate matter enters the instrument sampling unit through the cutter and is enriched on the filter paper belt, where the particulate matter is enriched into a spherical shape.

[0047] 2. A C14 radioactive source emits a beta-ray electron beam, which is detected by a beta detector as it passes through clean and sampled filter paper.

[0048] 3. The Type I vision sensor is used to photograph the sampling spots of the enriched filter paper strip and upload the images of the sampling spots.

[0049] 4. The Type I vision sensor is used for precise control of the paper tape's movement distance. The enriched sampling spots are captured by images. When the sampling spots move, the vision sensor captures images. The movement stops when the center of the sampling spot in the image reaches the center of the vision module.

[0050] 5. The Type II vision sensor is used to accurately determine the remaining usage period of the paper tape. By acquiring images through the Type II vision sensor, unused paper tape is photographed and sampled. Based on the internal model algorithm and image processing analysis, the remaining usage days of the paper tape are determined.

[0051] 6. A specific combination of sampling spots and image processing acquisition enables intelligent automatic calculation of data efficiency. By statistically analyzing the spot pass rate, the system automatically calculates the long-term data efficiency of the equipment for monthly, quarterly, and yearly operation.

[0052] 7. Under a specific combination of sampling spots and image acquisition, for each spot acquired, the system automatically stores and analyzes the spots, and then analyzes and judges them according to the algorithm. Based on the correspondence between the color depth and concentration of the spots and the damage, foreign objects, etc. of the spot pattern, the system marks the faults. After marking, the data is uploaded and the data review is completed automatically.

[0053] The sampling spots mainly fall into the following categories.

[0054] The first type is where the sampling spots are normal, uniform, and without missing spots. The color of the sampling spots corresponds to the current data concentration range, and is marked with N.

[0055] The second type is when the sampling spots are normal, the normal spots are uniform and without missing spots, and the color of the sampling spots does not correspond to the current data concentration range, and is marked as HN.

[0056] The third type is abnormal sampling spots, such as spots with tails, unevenness, burrs, gaps, etc. These have little impact on the data but need to be processed in time and marked with HM.

[0057] The fourth type is abnormal spots, where there are foreign objects in the spots, such as dust, insects, etc., which have a significant impact on the data. These spots are marked HQ and the data is invalidated. At the same time, the spots with foreign objects at the time of sampling are uploaded.

[0058] The fifth type is spot abnormality, where the paper tape has holes, which has a significant impact on the data. It is marked as HW, the data is invalidated, and the current sampling spot paper tape hole information is uploaded.

[0059] The sixth type is when the paper tape breaks, resulting in no paper tape for taking pictures, which affects the operation of the equipment, marks it as WZ, invalidates the data, and shuts down the equipment.

[0060] The main technical advantage of this invention lies in its ability to trace the source of a sample spot. By analyzing the enriched substances on the spot, it determines whether the current data anomaly is genuine. For example, the presence of foreign objects in the sampling spot can cause a sudden increase in concentration, which traditional particulate matter instruments cannot detect. Similarly, if the sampling spot is uneven or the sampling pump suddenly stops during the collection process, the spot image will also show low values. If the sampling spot is deep and the particulate matter concentration is very low, or if the sampling spot is shallow and the concentration is very high, it indicates an instrument malfunction.

[0061] The significant technical advantage of this invention lies in its ability to eliminate the encoder structure and utilize a vision sensor module to achieve more precise movement distance control through the acquisition of speckle images.

[0062] The significant technical advantage of this invention lies in eliminating the encoder structure and using a vision sensor module. By acquiring images from the vision sensor, the thickness of the paper tape on the paper tape pulley is collected, and the remaining service life of the paper tape is determined based on the thickness, thereby improving the intelligence level of the particulate matter meter.

Claims

1. A method for visually assisting in the determination of beta-ray particulate matter sampling spots, characterized in that, include: Paper roll pulley, tension pulley, take-up pulley, β detector, C14 source pressure head, Type I vision sensor, Type II vision sensor, slider with guide rail, photoelectric switch, air inlet pipe, filter paper belt. The paper tape pulley is used to mount blank paper tape. The tensioning wheel is used for supporting and tightening the paper tape. The paper collection wheel is used to collect the collected paper strips. The C14 source pressure head is used to release a beta-ray electron beam. The Type I vision sensor is located to the right of the C14 source pressure head and is used to sample and photograph the enriched paper tape. The Type II vision sensor is located to the left of the C14 source pressure head and is used for inspecting blank paper tapes before sampling. The guide rail slider is fixed above the Type II vision sensor and is used to move the Type II vision sensor above the paper tape pulley. The photoelectric switch is fixed near the Type II vision sensor and is used to determine the position of the Type II vision sensor. The air intake pipe is used to collect ambient air particulate matter onto the filter paper tape. The filter paper strip is used for the enrichment of particulate matter.

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