Dual-system ice layer thickness measuring device

Abstract

A dual-system ice layer thickness measuring device belongs to the field of automatic detection technology. The measuring device has high precision and durability, and is mainly used in the technical fields of water conservancy and hydrology. It is used for freezing river ice, lake ice and sea ice. Automatic detection of layer thickness. It is characterized in that it is a dual-system ice thickness measuring device for high-precision forecasting of water conservancy and hydrological ice conditions, and the whole set of measuring device is composed of a transmission system and a measuring system. The dual system means that the transmission system is composed of two sets of identical screw transmission systems, namely the front transmission system and the rear transmission system. The measuring device has a high measurement accuracy, which can reach ±2mm, and is an automatic monitoring device; the invention The measurement method of the measuring device is intuitive, similar to the most commonly used clamping measurement methods in the machinery industry (such as calipers and micrometers), and realizes high-precision measurement of ice thickness. It is suitable for automatic measurement of ice thickness on coastal sea ice or river ice or lake ice in rivers around hydrological stations.

Description

technical field [0001] The invention relates to a dual-system ice layer thickness measuring device, which belongs to the technical field of automatic detection. The measuring device has high precision and durability, and is mainly applicable to technical fields such as water conservancy and hydrology, and is used to freeze river ice, lake ice and sea ice The thickness of the ice layer is automatically detected. Background technique [0002] At present, my country lacks advanced technical means for continuous automatic detection of ice thickness in solving the problems of the Yellow River ice flood in the north, the safety of water transfer under the ice in winter in the South-to-North Water Diversion Project, and the changes in the production and consumption of polar sea ice. The methods currently used can be summarized into the following categories: one is the direct measurement method, which relies on manual ice digging or drilling to directly measure the ice thickness and...

AI Technical Summary

Problems solved by technology

There are roughly the following devices and methods: ①The electromagnetic induction ice thickness measuring instrument produced in Denmark - EMI sea ice thickness detector, this detection system realizes automatic non-contact detection, but it is almost impossible to realize real-time monitoring, and the cost is relatively high high

②Sonar detection method, this method is to put a set of sonar devices under the ice, and can use sonar to accurately judge the ice-water interface, but cannot judge the upper interface between air and ice, and the measurement error is relatively large

The measurement of this method must rely on the marine anti-icing platform, and there are many factors that affect the accuracy, such as illumination field of view noise, CCD performance, lens distortion, quantization error, frame memory and CCD out of sync, etc.

④ The device and method for measuring sea ice thickness declared by the China Polar Research Center in 2009 (patent number: ZL 200910046071.4) uses a combination of electromagnetic induction and laser technology to measure sea ice thickness. Due to the high cost of the device, Inconvenient installation and other factors have not yet been popularized

In the process of actual use, it is found that the inventive product also has some shortcomings: mainly due to the influence of moisture contained on the surface of the sensor, resulting in large errors in measurement results

On this basis, I improved it to a capacitive sensing ice thickness measurement sensor. This sensor is relatively stable during use, but the problem is that the accuracy is not high, which is ±1cm, and it cannot adapt to ice thermodynamics research on ice thickness change parameters. requirements

[0003]Generally stated: With the further improvement of national economic development, the high accuracy requirements for water conservancy and hydrological and ice forecasts are getting higher and higher, which can no longer adapt to the new situation under the request

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