Real-time monitoring and early warning device and early warning method for content of free silicon dioxide in industrial and mining dust

Abstract

The invention relates to the technical field of industrial and mining dust monitoring, and discloses a real-time monitoring and early warning device for the content of free silicon dioxide in industrial and mining dust, the real-time monitoring and early warning device comprises a rear shell and a front shell, the rear shell and the front shell are fixedly connected to form a device main body, the outer side surface of the rear shell is provided with a display module, and the top surface of the rear shell is provided with a sound-light alarm module. A preprocessing module, a measuring module and a data acquisition and transmission module are respectively arranged in the device main body, the preprocessing module is distributed at the front side in the device main body, the measuring module is installed at the middle position in the device main body, and the measuring module comprises a measuring light source, an optical fiber system, an integrating sphere and a light intensity signal detection module. Through a multi-angle and multi-channel measurement mode, the accuracy of data can be improved, errors caused by single-angle measurement are reduced, and the concentration value of silicon dioxide is more accurate, so that the reliability of dust monitoring is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial and mining dust monitoring, and in particular to a real-time monitoring and early warning device and method for free silicon dioxide content in industrial and mining dust. Background Art

[0002] Monitoring free silica (Crystalline Silica) is crucial in industrial and mining environments, particularly in mining areas, primarily due to the potential health risks posed by free silica dust. Free silica is a highly pathogenic component of mining dust, and when inhaled, it can lead to a range of serious health problems. Monitoring free silica levels can promptly detect changes in the concentration of harmful substances in dust, prevent occupational diseases, and protect worker health.

[0003] Traditional sampling and immobilization methods utilize specialized samplers or filtration devices to collect dust samples from the air and immobilize free silica through chemical or physical adsorption. Quantitative analysis is then performed using appropriate chemical or spectroscopic methods. Traditional sampling methods rely on laboratory analysis, lack real-time data feedback, and lack sufficient sensitivity for monitoring at low concentrations or under specific circumstances.

[0004] To this end, we propose a real-time monitoring and early warning device and method for the free silica content in industrial and mining dust. Summary of the Invention

[0005] The present invention mainly solves the above technical problems and provides a real-time monitoring and early warning device and early warning method for the free silicon dioxide content in industrial and mining dust.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a real-time monitoring and early warning device for the free silica content in industrial and mining dust, comprising a rear shell and a front shell, the rear shell and the front shell being fixedly connected to form a device body, a display module being provided on the outer side of the rear shell, and an audible and visual alarm module being provided on the top surface of the rear shell; The interior of the device body is respectively provided with a preprocessing module, a measurement module and a data acquisition and transmission module. The preprocessing module is distributed on the front side of the interior of the device body. After the dust sample enters the device body, the preprocessing module is responsible for preliminary filtering or processing the dust entering the measuring device to ensure the quality of the sample. The measurement module is installed in the middle position inside the device body.

[0007] Preferably, the measurement module includes a measurement light source, an optical fiber system, an integrating sphere and a light intensity signal detection module.

[0008] Preferably, the data acquisition and transmission module includes a host computer data acquisition module and a PLC data acquisition module. After receiving the scattered light, the light intensity signal detection module transmits the signal to the host computer data acquisition module and the PLC data acquisition module.

[0009] A real-time monitoring and early warning method for the free silicon dioxide content in industrial and mining dust comprises the following steps: S1. Dust sample collection and input; S2. Dust sample processing and measurement preparation; S3, conduction and scattering of optical signals; S4, data collection and transmission; S5. Data analysis and early warning; After the dust sample is preliminarily filtered and processed by the pre-processing module, the sample enters the measurement module. When irradiated by the measuring light source, the light signal is absorbed or scattered by the free silica component in the dust. The scattered light signal is introduced into the integrating sphere through the optical fiber system for multi-angle collection, and then transmitted to the light intensity signal detection module through multiple channels for measurement. The light intensity signal is converted into a digital signal and transmitted to the data acquisition and transmission module, and then transmitted to the computer for processing through the host computer data acquisition module and the PLC data acquisition module. The concentration of free silica in the dust is calculated based on the real-time measured scattered light intensity and combined with the preset algorithm, and an early warning is issued through the set threshold.

[0010] Preferably, in S1, the dust sample in the industrial and mining environment first enters the pretreatment module inside the device body, and the pretreatment module performs preliminary filtering or processing. The dust sample processed by the pretreatment module enters the measurement module, and in the measurement module, the dust sample will be optically measured.

[0011] Preferably, said S3, S3 includes S301, S302 and S303; S301: The optical fiber system guides the optical signal of the sample into the subsequent detection system to ensure minimal optical signal transmission loss; S302: The light signal enters the integrating sphere, which collects scattered light signals from multiple angles to ensure that signals are received from different directions. S303: The scattered light signal is transmitted to the light intensity signal detection module through multiple channels of the integrating sphere. The concentration of free silica in the dust is determined by the scattered light intensity at different angles. Each channel in the integrating sphere corresponds to a specific scattering angle.

[0012] Preferably, the S4, S4 includes S401 and S402. After receiving the scattered light, the light intensity signal detection module converts the light signal into a digital signal and transmits it to the data acquisition and transmission module. The data acquisition and transmission module is composed of a host computer data acquisition module and a PLC data acquisition module. The host computer data acquisition module and the PLC data acquisition module work together to transmit the measurement data from the field equipment to the computer respectively.

[0013] Preferably, the S5 includes S501. In S501, the computer data analysis module calculates the concentration of free silica in the dust according to the real-time measured scattered light intensity data using a preset algorithm. The preset algorithm includes the following formula: The formula for the change of light intensity is: ; The scattering intensity of dust and the concentration of free silica The following relationship formula exists: ; Light travel time and path length The following relationship exists: ; The mathematical model for calculating the free silica concentration in dust is derived by the following steps: Step 1: Through the measured light intensity data and Calculate the light intensity attenuation: ; Step 2: Calculate the intensity of the scattered light: ; Step 3: Calculate the free silica concentration : ; Combining the above formulas, the final free silica concentration calculation formula is: .

[0014] Preferably, the S5 further includes S502, when the concentration of free silicon dioxide exceeds a set safety threshold, the system will trigger an early warning, and the early warning method includes an audible and visual alarm module and a display module.

[0015] The present invention provides a real-time monitoring and early warning device and method for the free silicon dioxide content in industrial and mining dust. It has the following beneficial effects: (1) This device and method for real-time monitoring and early warning of the content of free silica in industrial and mining dust can effectively filter out impurities in the sample and ensure the quality of the measured sample by performing multi-stage processing and optical measurement on the dust sample. Under the action of the pre-processing module, it can remove larger particles and impurities and eliminate these interference factors, thereby avoiding negative impact on the measurement results. In the measurement module, the optical measurement method uses an optical fiber system and an integrating sphere to collect scattered light signals at multiple angles, and detects the intensity of the scattered light through a light intensity signal detection module to determine the concentration of free silica in the dust. The multi-angle and multi-channel measurement method can improve the accuracy of the data, reduce the error caused by single-angle measurement, make the silica concentration value more accurate, and thus improve the reliability of dust monitoring; (2) The device and method for real-time monitoring and early warning of the free silica content in industrial and mining dust can monitor the concentration of free silica in dust efficiently and in real time by utilizing the relationship between light scattering and the characteristics of free silica, without relying on traditional chemical analysis methods. The technical method of optical measurement has many significant advantages, especially when performing real-time dust monitoring in industrial and mining environments, it can provide a faster, more accurate and efficient solution to achieve real-time monitoring of the free silica concentration in dust; (3) This is a real-time monitoring and early warning device and method for the free silica content in industrial and mining dust. During the data analysis phase after data collection and transmission, the computer system can comprehensively judge the concentration of free silica in the dust based on the different angular intensities of the multi-channel scattered light signals and issue an early warning. By capturing the scattered light details through the angular sensitivity of multiple channels, the system can accurately judge the concentration changes of free silica particles, and even small concentration fluctuations can be captured in time. In this way, the solution improves the sensitivity and accuracy of the early warning, can effectively identify potential harmful dust concentration fluctuations, issue early warnings in a timely manner, and ensure the safety of workers and the environment; (4) This is a real-time monitoring and early warning device and method for the content of free silica in industrial and mining dust. The data acquisition and transmission module is composed of a host computer data acquisition module and a PLC data acquisition module working together to ensure that the measured data can be transmitted from the on-site equipment to the computer for processing and display in real time. The dual cooperation of the host computer module and the PLC data acquisition module effectively guarantees both on-site data acquisition and data transmission, thereby ensuring the stability and accuracy of data transmission. The light intensity signal detection module converts the measured scattered light signal into a digital signal and transmits it through the data acquisition module. This solution ensures the timely update and processing of on-site dust concentration data through real-time data transmission and a stable data processing mechanism, so that it can quickly respond to environmental changes and promptly discover potential risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0017] The structures, proportions, sizes, etc. disclosed in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not intended to limit the conditions under which the present invention can be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes should still fall within the scope of the technical contents disclosed in the present invention without affecting the efficacy and objectives that can be achieved by the present invention.

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the main body of the device of the present invention; Figure 2 This is a diagram of the module architecture included in the main body of the device of the present invention; Figure 3 This is the overall monitoring flow chart of the present invention; Figure 4 This is a flow chart of dust sample collection, pretreatment and detection in the present invention; Figure 5 This is a flow chart of data collection, transmission, analysis and early warning in the present invention.

[0019] Legend: 1. Rear shell; 2. Front shell; 3. Measurement module; 4. Sound and light alarm module; 5. Preprocessing module; 6. Display module; 7. Data acquisition and transmission module; 70. Host computer data acquisition module; 71. PLC data acquisition module; 301. Measuring light source; 303. Optical fiber system; 306. Integrating sphere; 310. Light intensity signal detection module. DETAILED DESCRIPTION

[0020] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] A real-time monitoring and early warning device for free silica content in industrial and mining dust comprises a rear housing 1 and a front housing 2, which are fixedly connected to form a device body. A display module 6 is provided on the outer side of the rear housing 1, and an audible and visual alarm module 4 is provided on the top surface of the rear housing 1. A preprocessing module 5, a measurement module 3, and a data acquisition and transmission module 7 are provided inside the device body. Specifically, the pre-processing module 5 is distributed on the front side of the interior of the device body. After the dust sample enters the device body, the pre-processing module 5 is responsible for preliminary filtering or processing the dust entering the measuring device to ensure the quality of the sample. The measuring module 3 is installed in the middle position inside the device body. The measuring module 3 includes a measuring light source 301, an optical fiber system 303, an integrating sphere 306 and a light intensity signal detection module 310. The measuring light source 301 provides a light source to illuminate the dust in the sample. The light signal is absorbed or scattered by the free silica in the dust. The optical fiber system 303 guides the signal to the subsequent detection module to ensure minimal loss during signal transmission. The integrating sphere 306 collects scattered light signals from multiple angles and receives signals from the sample through different channels. The light intensity signal detection module 310 finally detects the intensity of the scattered light and judges the concentration of free silica in the dust through the signal. Furthermore, the data acquisition and transmission module 7 includes a host computer data acquisition module 70 and a PLC data acquisition module 71. The host computer data acquisition module 70 and the PLC data acquisition module 71 work together to transmit the measurement data from the field equipment to the computer for further processing. After the light intensity signal detection module 310 receives the scattered light, it transmits the signal to the host computer data acquisition module 70 and the PLC data acquisition module 71. The above multiple groups of modules cooperate with each other to transmit the data to the computer system for further analysis.

[0022] A real-time monitoring and early warning method for the free silicon dioxide content in industrial and mining dust comprises the following steps: S1. Dust sample collection and input; The dust samples in the industrial and mining environment first enter the pre-processing module 5 inside the main body of the device. The pre-processing module 5 performs preliminary filtration or processing to ensure that the dust samples entering the measurement module meet the test requirements and eliminate the influence of oversized particles, impurities, etc. on the measurement results. The pre-processing module performs preliminary filtration and processing on the dust to ensure the quality of the measurement samples, thereby improving the accuracy of dust monitoring.

[0023] S2, dust sample processing and measurement preparation; S201: The dust sample processed by the pre-processing module 5 enters the measuring module 3, where the dust sample undergoes optical measurement; S202: The measuring light source 301 irradiates the dust in the sample. The light signal is absorbed or scattered by the free silica component in the sample dust. Dust particles of different particle sizes and shapes have different absorption and scattering characteristics of light. In particular, free silica will have a significant impact on the light signal of a specific wavelength.

[0024] S3, conduction and scattering of optical signals; S301: The optical fiber system 303 guides the optical signal from the sample to the subsequent detection system to ensure that the optical signal is minimally lost during transmission; S302: Entering the integrating sphere 306, the integrating sphere 306 collects scattered light signals at multiple angles to ensure that signals emitted by the sample are received from different directions; S303: The scattered light signal is transmitted to the light intensity signal detection module 310 through multiple channels of the integrating sphere 306. The light intensity signal detection module 310 determines the concentration of free silica in the dust by detecting the scattered light signal intensity at different angles; Specifically, the scattered light signal is transmitted to the light intensity signal detection module 310 through multiple channels within the integrating sphere 306. The channels within the integrating sphere 306 correspond to a single scattering angle. The existence of the channels can collect light signals scattered from the dust sample at different angles. The signal of each channel can respectively reflect the light intensity information at different scattering angles, providing more comprehensive data support for the light intensity signal detection module 310. By detecting light signals at different angles, the scattering characteristics of free silica particles in dust can be accurately captured. There is a certain correlation between the intensity of these scattered lights and the particle size, morphology and concentration of silica. For example, free silica particles may produce strong scattering of light signals of certain wavelengths, but weaker scattering of light signals of other wavelengths. These subtle differences are captured through the angular sensitivity of multiple channels, thereby providing more accurate concentration data.

[0025] S4, data collection and transmission; S401: After receiving the scattered light, the light intensity signal detection module 310 converts the light signal into a digital signal and transmits it to the data acquisition and transmission module 7; S402: The data acquisition and transmission module 7 is composed of a host computer data acquisition module 70 and a PLC data acquisition module 71. The host computer data acquisition module 70 and the PLC data acquisition module 71 work together to transmit measurement data from the field equipment to the computer. The host computer data acquisition module 70 is mainly responsible for transmitting real-time data to the computer for processing and display, while the PLC data acquisition module 71 is responsible for real-time collection and monitoring of field data, ensuring that measurement data can be transmitted from the field equipment to the computer for processing and display in real time. The dual cooperation of the host computer module 70 and the PLC data acquisition module 71 effectively guarantees both field data acquisition and data transmission, thereby ensuring the stability and accuracy of data transmission.

[0026] S5. Data analysis and early warning; S501: After the computer system receives data from the host computer data acquisition module 70, it enters the data analysis stage. In S501, the computer data analysis module calculates the concentration of free silica in the dust based on the real-time measured scattered light intensity data using a preset algorithm. In dust, light attenuation is mainly due to absorption and scattering. Therefore, the Beer-Lambert law is used to describe the change in light intensity. The formula is as follows: ; To measure the emission intensity of the light source; is the received light intensity after passing through the dust sample; is the absorption coefficient of free silica; is the scattering coefficient of free silica; is the effective path length of the dust sample.

[0027] Under specific conditions, the scattering intensity of dust is related to the concentration of free silica. The following relationship exists: ; is the scattered light intensity; is the scattering coefficient of free silica; is the concentration of free silica is the optical path length.

[0028] According to the above formula, the scattered light intensity and free silica concentration Directly proportional.

[0029] Assume that the speed of light in air is constant , the travel time of light and the path length The following relationships exist: ;; in, is the travel time of light; is the optical path length; The speed of light in a vacuum atmosphere; Based on the above light attenuation and scattering relationship, the mathematical model for calculating the concentration of free silica in dust is derived through the following steps: Step 1: Through the measured light intensity data and Calculate the light intensity attenuation: ; Step 2: Calculate the intensity of the scattered light: ; Step 3: Calculate the free silica concentration : Based on the relationship between scattered light intensity and concentration, the scattering coefficient is known. and path length Calculate the free silica concentration :

[0030] By combining the above formulas, the final free silica concentration calculation formula is: .

[0031] Through the above formula, the computer data analysis module can obtain the real-time measured light intensity data ( and ), combined with the preset algorithm, the concentration of free silica in the dust is calculated By utilizing the relationship between light scattering and the characteristics of free silica, the concentration of free silica in dust can be monitored efficiently and in real time without relying on traditional chemical analysis methods. The technical method of optical measurement has many significant advantages, especially when conducting real-time dust monitoring in industrial and mining environments. It can provide a faster, more accurate and efficient solution to achieve real-time monitoring of the concentration of free silica in dust.

[0032] S502: When the concentration of free silica exceeds the set safety threshold, the system will trigger an early warning. When the concentration of free silica exceeds the set safety threshold, the system will trigger an early warning. The early warning method includes the sound and light alarm module 4 and the display module 6. The alarm is output through multiple signals to ensure that safety personnel can quickly understand the concentration of free silica in the dust and take corresponding safety measures in time to ensure the safety of on-site workers.

[0033] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A real-time monitoring and early warning device for the content of free silicon dioxide in industrial and mining dust, comprising a rear shell (1) and a front shell (2), wherein the rear shell (1) and the front shell (2) are fixedly connected to form a device body, a display module (6) is provided on the outer side surface of the rear shell (1), and an audible and visual alarm module (4) is provided on the top surface of the rear shell (1); Its characteristics are: The interior of the device body is respectively provided with a pre-processing module (5), a measuring module (3) and a data acquisition and transmission module (7). The pre-processing module (5) is distributed on the front side of the interior of the device body. After the dust sample enters the device body, the pre-processing module (5) is responsible for preliminary filtering or processing the dust entering the measuring device to ensure the quality of the sample. The measuring module (3) is installed in the middle position of the interior of the device body.

2. The real-time monitoring and early warning device for free silicon dioxide content in industrial and mining dust according to claim 1 is characterized by: The measuring module (3) comprises a measuring light source (301), an optical fiber system (303), an integrating sphere (306), and a light intensity signal detection module (310).

3. The real-time monitoring and early warning device for free silicon dioxide content in industrial and mining dust according to claim 2 is characterized in that: The data acquisition and transmission module (7) comprises a host computer data acquisition module (70) and a PLC data acquisition module (71); after receiving the scattered light, the light intensity signal detection module (310) transmits the signal to the host computer data acquisition module (70) and the PLC data acquisition module (71).

4. A real-time monitoring and early warning device and method for free silicon dioxide content in industrial and mining dust, characterized by: The method comprises the following steps: S1. Dust sample collection and input; S2. Dust sample processing and measurement preparation; S3, conduction and scattering of optical signals; S4, data collection and transmission; S5. Data analysis and early warning; After the dust sample is preliminarily filtered and processed by the pre-processing module (5), the sample enters the measuring module (3) and is irradiated by the measuring light source (301). The light signal is absorbed or scattered by the free silica component in the dust. The scattered light signal is introduced into the integrating sphere (306) through the optical fiber system (303) for multi-angle collection and then transmitted to the light intensity signal detection module (310) through multiple channels for measurement. The light intensity signal is converted into a digital signal and transmitted to the data acquisition and transmission module (7). It is transmitted to the computer for processing through the host computer data acquisition module (70) and the PLC data acquisition module (71). The concentration of free silica in the dust is calculated based on the real-time measured scattered light intensity and combined with the preset algorithm, and an early warning is issued through the set threshold.

5. The method for real-time monitoring and early warning of the free silicon dioxide content in industrial and mining dust according to claim 4, characterized in that: In the aforementioned S1, the dust sample in the industrial and mining environment first enters the pre-processing module (5) inside the main body of the device, and the pre-processing module (5) performs preliminary filtration or processing. The dust sample processed by the pre-processing module (5) enters the measuring module (3), and in the measuring module (3), the dust sample is optically measured.

6. The method for real-time monitoring and early warning of the free silicon dioxide content in industrial and mining dust according to claim 4, characterized in that: Said S3, S3 includes S301, S302 and S303; S301: The optical fiber system (303) guides the optical signal of the sample into the subsequent detection system to ensure that the optical signal transmission loss is minimal; S302: The light signal enters the integrating sphere (306), and the integrating sphere collects scattered light signals from multiple angles to ensure that signals are received from different directions; S303: The scattered light signal is transmitted to the light intensity signal detection module (310) through multiple channels of the integrating sphere (306), and the concentration of free silica in the dust is determined by the scattered light intensity at different angles. Each channel in the integrating sphere (306) corresponds to a specific scattering angle.

7. The method for real-time monitoring and early warning of the free silicon dioxide content in industrial and mining dust according to claim 4, characterized in that: Said S4, S4 includes S401 and S402. After receiving the scattered light, the light intensity signal detection module (310) converts the light signal into a digital signal and transmits it to the data acquisition and transmission module (7). The data acquisition and transmission module (7) is composed of a host computer data acquisition module (70) and a PLC data acquisition module (71). The host computer data acquisition module (70) and the PLC data acquisition module (71) work together to transmit the measurement data from the field equipment to the computer.

8. The method for real-time monitoring and early warning of the free silicon dioxide content in industrial and mining dust according to claim 4, characterized in that: Said S5, S5 includes S501, in S501, the computer data analysis module calculates the concentration of free silica in the dust according to the real-time measured scattered light intensity data through a preset algorithm, and the preset algorithm includes the following formula: The formula for the change of light intensity is: ; The scattering intensity of dust and the concentration of free silica have the following relationship formula: ; There is the following relationship between the travel time of light and the path length: ; The mathematical model for calculating the free silica concentration in dust is derived by the following steps: Step 1: Through the measured light intensity data and Calculate the light intensity attenuation: ; Step 2: Calculate the intensity of the scattered light: ; Step 3: Calculate the free silica concentration : ; Combining the above formulas, the final free silica concentration calculation formula is: .

9. The method for real-time monitoring and early warning of free silicon dioxide content in industrial and mining dust according to claim 4, characterized in that: Said S5, S5 also includes S502, when the concentration of free silicon dioxide exceeds the set safety threshold, the system will trigger an early warning, and the early warning method includes an audible and visual alarm module (4) and a display module (6).

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