System and method for obtaining vacuum in middle school physics experiment

Abstract

The invention belongs to the technical field of vacuum, and discloses a system and a method for obtaining the vacuum in a middle school physics experiment. The system for obtaining the vacuum in the middle school physics experiment includes a power supply module, a pressure intensity detection module, a gas concentration detection module, a main control module, an air exhaust module, an illumination module, a device fault diagnosis module, and a display module. The gas concentration detection module adopts a continuously adjustable single-frequency light source of 2.3 [mu]m-2.8 [mu]m, the wavelength of a light signal generated by a light source can be adjusted according to a maximum absorption peak of a to-be-detected gas, and measurement of a plurality of gases having different absorptionpeaks is achieved; the detection precision of gas concentration is greatly improved; and at the same time, the device fault diagnosis module adopts a combined classification method to achieve diagnosis of faults of vacuum equipment components, and the precision of fault diagnosis is significantly improved.

Description

technical field [0001] The invention belongs to the field of vacuum technology, in particular to a system and method for obtaining vacuum in middle school physics experiments. Background technique [0002] Vacuum refers to the state of gas below one atmospheric pressure in a given space; originally it refers to void, that is, the space where there is nothing. Vacuum in industry and vacuum science means that when the pressure in the container is lower than atmospheric pressure, the part below atmospheric pressure is called vacuum; air refers to the mixture of gases in the earth's atmosphere, and air belongs to the mixture, which is mainly composed of nitrogen , oxygen, rare gases (helium, neon, argon, krypton, xenon, radon, hydrogen), carbon dioxide and other substances (such as water vapor, impurities, etc.). However, in the process of obtaining a vacuum in the existing middle school physics experiments, the error of measuring the gas concentration by electrochemical method...

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Problems solved by technology

[0004] (1) In the process of obtaining vacuum in the existing middle school physics experiment, the error of measuring gas concentration by electrochemical method is relatively large, the light source stability of ultraviolet absorption method is not good, and the light source of single wavelength used in near infrared spectroscopy is difficult Measure a variety of gases with different absorption peaks; at the same time, there is no efficient method for obtaining vacuum equipment fault diagnosis, some algorithms lack versatility, and some algorithms have low accuracy, which is difficult to meet the needs

[0005] (2) the barometer that middle school physics experiment utilizes in the prior art is easily affected by temperature, reduces the precision of detection; Traditional algorithm falls into local convergence in data processing, can not obtain reliable vacuum data in physics experiment, reduces work efficiency

[0006] (3) The processing system used in middle school physics experiments in the prior art cannot effectively cluster and mine data, thereby reducing the speed of system operation

[0007] (4) When using the vacuum degree sensor to detect the vacuum degree inside the container in the middle school physics experiment in the prior art, the traditional compensation algorithm is used to compensate the detected vacuum degree value, which cannot effectively reduce the measurement error and reduce the compensation accuracy. Reliable detection value, resulting in easy damage to the air pump

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