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An Atmospheric Visibility Measuring and Forecasting Instrument

A technology of atmospheric visibility and measurement modules, which can be used in measurement devices, transmittance measurement, weather condition prediction, etc., and can solve problems such as large model simulation errors and difficult predictions

Active Publication Date: 2017-11-03
上海宜先环保仪器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005]Second, the model simulation has a large error in complex terrain;
[0006]Third, the calculation of the model requires a strong professionalism, so it is very difficult to predict the changes caused by the changes in the surrounding environment of the observation point

Method used

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  • An Atmospheric Visibility Measuring and Forecasting Instrument
  • An Atmospheric Visibility Measuring and Forecasting Instrument

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: Forecast function implementation plan:

[0030] The testing process is as follows:

[0031] 1. Open the first solenoid valve and close the second solenoid valve. At this time, the ambient gas passes through the dryer (drying tube) to remove moisture, and then passes through the filter membrane to remove the aerosol and form zero gas, and then enters the measurement module of the extinction system. 2. Measure the extinction or visibility value at this time to obtain instrument background data. 3. Close the first solenoid valve, open the second solenoid valve, adjust the relative humidity to the relative humidity after 1 hour according to the forecast value, and measure the relative humidity data at this time. 4. After deducting the background extinction, it is calculated according to the formula: forecast extinction coefficient = measured extinction coefficient × forecasted PM2.5 mass / calculated current PM2.5 mass. In the formula, the PM2.5 quality forecast ...

Embodiment 2

[0032] Embodiment 2: Analysis function implementation plan:

[0033] The testing process is as follows:

[0034] 1. Open the first solenoid valve and close the second solenoid valve. At this time, the ambient gas passes through the dryer to remove moisture, and then passes through the filter membrane to go out of the aerosol to form zero gas and enter the measurement module of the extinction system. 2. Measure the extinction or visibility value at this time to obtain instrument background data. 3. Close the first solenoid valve, open the second solenoid valve, and set multiple relative humidity adjustments from bottom to high, which can be 40%, 50%, 60%, 70%, 75%, 80%, 85%, 90% , sequentially measure the above relative humidity data. 4. After deducting the background extinction, the response curve of visibility to relative humidity can be obtained for theoretical research.

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Abstract

The invention discloses an atmospheric visibility measuring and forecasting instrument. The relative humidity is the most important meteorological element affecting the atmospheric visibility, and the relative humidity is the primary factor determining the visibility under the condition that the physical and chemical properties of the aerosol do not change significantly. The instrument can automatically adjust the relative humidity to the relative humidity of the forecast time period to realize the forecast function of visibility. In addition, the instrument can also realize the measurement of visibility under different relative humidity, and this function will play an important role in theoretical research. The instrument includes an aerosol sampling module, a relative humidity control module, an extinction coefficient measurement module, and a data processing module, and is characterized in that: in the relative humidity control module, the drier is connected to the extinction coefficient measurement module in two ways respectively, wherein One path is connected to the extinction coefficient measurement module through the filter and the first solenoid valve, and the other path is connected to the extinction coefficient measurement module through the humidity control assembly and the second solenoid valve.

Description

Technical field: [0001] The invention relates to a visibility measuring and forecasting instrument, and a forecasting and measuring method, belonging to the technical field of atmospheric measurement. Background technique: [0002] The impression of relative humidity on atmospheric visibility has been widely concerned, because the particle size and extinction characteristics of aerosols will change significantly under high relative humidity, which will have a significant impact on visibility. [0003] So far, the forecast work of atmospheric visibility is mainly calculated by the method of model calculation. The core idea is to calculate the particle size, number concentration, and chemical composition information of aerosols that conform to the future real situation through the model, and calculate the visibility situation based on the future temperature, humidity, and pressure information. With the deepening of the research, the accuracy of the method of model calculation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/59G01W1/10
Inventor 张泽锋常嘉成严家德王静吕晶晶
Owner 上海宜先环保仪器有限公司