Liquid level detection device and system

Abstract

The invention relates to a liquid level detection device and system, in particular to the field of liquid level detection. The liquid level detection device provided by the invention comprises a container, a light-transmitting part, a first metal film layer, a metal floating layer and a second metal film layer, when a to-be-detected liquid level needs to be detected, the device is placed on the to-be-detected liquid level, light irradiates on the second metal film layer, the metal floating layer and the first metal film layer to excite the surface plasmon effect, and when the liquid height changes, due to the fact that the floating heights of the multiple metal units of the metal floating layer change, the coupling distance between the first metal film layer and the second metal film layer is changed, and then the coupling strength between the first metal film layer and the second metal film layer is changed, so that the intensity of the output light passing through the light transmitting part at the hole position is changed, the intensity of the output light is detected, and the height of the liquid level to be measured is obtained according to the corresponding relation between the intensity of the output light and the height of the liquid level to be measured.

Description

technical field [0001] The present application relates to the field of liquid level detection, in particular, to a liquid level detection device and system. Background technique [0002] The liquid level measurement in the prior art is generally through electrical or optical measuring devices. The optical measurement method is generally to measure the reflected light to complete the measurement of the liquid level. Measurement of liquid level. [0003] However, whether it is electrical measurement or optical measurement, the water resistance and sealing of the device need to be considered, which makes the device for measuring the liquid level more complicated, and if the measurement is inflammable and explosive substances, both electrical and optical are prone to danger. Contents of the invention [0004] The purpose of the present invention is to provide a liquid level detection device and system for the above-mentioned deficiencies in the prior art, so as to solve the p...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a liquid level detection device and system for the above-mentioned deficiencies in the prior art, so as to solve the problem that both electrical measurement and optical measurement in the prior art need to consider the waterproofness and airtightness of the device, so that The device for measuring the liquid level is relatively complicated, and if it measures flammable and explosive substances, both electrical and optical problems are prone to dangerous problems

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