Title:
LIQUID LEVEL DETECTION SYSTEM AND LIQUID LEVEL DETECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2020/097847
Kind Code:
A1
Abstract:
A liquid level detection system and a liquid level detection method therefor. The detection system comprises a light source (1), a light guide medium (2), a photoelectric conversion receiver (3), and a processing module (4). The light guide medium (2) has an incident surface (21), a first reflecting surface (22), and a light-exiting surface (23). The first reflecting surface (22) comprises a first sub-reflecting surface (22a) and a second sub-reflecting surface (22b) with liquid level (90) as a dividing line. A light beam emitted from the light source (1) is incident to the light guide medium (2) via the incident surface (21), then to the first reflecting surface (22), and finally to the photoelectric conversion receiver (3) via the light-exiting surface (23). The refraction angles generated when the light beam is irradiated on the first sub-reflecting surface (22a) and the second sub-reflecting surface (22b) at the same angle are different, and the light intensity loss is different. Therefore, a mutation position presents in the finally generated light intensity image. The mutation position is the position of the liquid level (90), so that the position of the liquid level (90) can be obtained according to the change position of the light intensity of the light beam after passing through the light guide medium (2). When the liquid concentration and temperature change or are limited by the environment, the light intensity of the light beam at the junction of the first sub-reflecting surface (22a) and the second sub-reflecting surface (22b) also changes, so as to ensure test accuracy.
Inventors:
LI YANG (CN)
Application Number:
PCT/CN2018/115616
Publication Date:
May 22, 2020
Filing Date:
November 15, 2018
Export Citation:
Assignee:
HIZERO TECH CO LTD (CN)
International Classes:
G01F23/292
Foreign References:
| CN101788320A | 2010-07-28 | |||
| CN101782419A | 2010-07-21 | |||
| CN1243946A | 2000-02-09 | |||
| CN201974214U | 2011-09-14 | |||
| DE102011089703B3 | 2013-05-23 | |||
| FR2672390B1 | 1994-12-30 |
Attorney, Agent or Firm:
SCIHEAD IP LAW FIRM (CN)
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