Nitrogen blowing instrument automatic control device and monitoring control method

Abstract

The invention relates to the technical field of detection, and particularly relates to a nitrogen blowing instrument automatic control device which mainly comprises an information acquisition system,a fixed moving mechanism and a control system. Technical improvement is carried out on the basis of existing nitrogen blowing instrument equipment, ascending and descending of a nitrogen blowing pipeand a transparent test tube can be controlled respectively, a nitrogen blowing condition of a sample in the test tube is monitored and adjusted in real time, the nitrogen blowing pipe is automaticallyclosed and ascended after the requirement is met, and the transparent test tube also ascends to the position above a liquid level of a water bath environment; and an audio-video prompt is sent. The device replaces manual operation, realizes automation, improves the detection quality and efficiency, and overcomes defects of inaccurate liquid level height judgment and inaccurate judgment on a concentration end node in the concentration process in the prior art.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to an automatic control device and a monitoring control method for a nitrogen blowing instrument. Background technique [0002] The nitrogen blowing instrument is often used to concentrate the sample during the inspection process. Before the nitrogen blowing, the operator must observe and manually adjust the distance between the nitrogen blowing pipe and the sample and the depth of the test tube immersed in the constant temperature water bath. During the nitrogen blowing process Because the sample concentration in each test tube takes different time, it is necessary to observe the distance between the sample liquid surface and the nitrogen blowpipe at all times. If it is too large, you need to manually adjust the distance from the nitrogen blowpipe to the sample liquid surface. The time it takes for the sample to meet the concentration requirements is inconsistent, so it is necess...

AI Technical Summary

Problems solved by technology

However, the ultrasonic liquid level gauge used in the literature is sensitive to temperature. At the same time, when there is water mist, it will affect the accuracy of the measurement, and the measurement has a certain blind area, and the volume is large. When the diameter of the test tube is small, it is not convenient to arrange. Compared with the traditional Nitrogen blowing device, the equipment is too complicated and expensive; in addition, due to the uncertain concentration of different sample solutions, the method of determining the end time of concentration according to the height of the sample solution is not applicable

[0004] Most of the existing technologies only consider the control of the nitrogen blowpipe and the height of the liquid level during the concentration process. In addition, only the rise and fall of the test tube or the nitrogen blowpipe is controlled separately, and the test tube cannot be controlled to enter and exit the water bath. Manual operation is still required; The low concentration of the sample solution leads to complicated liquid surface churning. The liquid level measurement device used in the prior art cannot accurately collect and judge the actual height of the liquid level, resulting in low accuracy of the control process and the inability to achieve optimal concentration efficiency; in addition, The lifting device in the prior art is too complicated to be suitable for test tubes with different diameters, especially small diameter test tubes, resulting in increased nitrogen consumption and reduced concentration efficiency, and cannot realize the simultaneous control of more than one group of different concentrated samples

Images