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Liquid level detecting device

A technology for liquid level detection and liquid level height, which is applied in the direction of measuring devices, liquid level indicators, lubrication indicating devices, etc., and can solve problems such as ineffectiveness and low precision

Inactive Publication Date: 2004-07-21
大纒直之
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, even in the case of detecting the liquid level, since it is impossible to correctly determine a specific liquid level, only a very low-precision liquid level can be detected, which does not actually work

Method used

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Examples

Experimental program
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no. 1 example

[0058] Next, the liquid level detection device of the present invention will be described with reference to the drawings. First, a first embodiment of the liquid level detection device of the present invention will be described. figure 1 is a schematic diagram showing the use state of the liquid level detection device of the present invention; figure 2 It is a sectional view of the first embodiment of the liquid level detection device of the present invention. in addition, figure 2 yes figure 1 A magnified view of the dotted line in . The liquid level detection device 10 of the present invention, for example, is that the columnar part is inserted into the tank substantially vertically from the top of a container such as a tank, and the liquid 17 is contacted with the liquid level detection part below to measure the liquid level. detection.

[0059] figure 2 The liquid level detection device 10 of the present invention shown in the figure has a total length of approx...

no. 2 example

[0075] Next, a second embodiment of the liquid level detection device of the present invention will be described. Figure 5 It is a sectional view of the second embodiment of the liquid level detection device of the present invention. Figure 5 Liquid level detection device 10 of the present invention shown in, and figure 2 The liquid level detection device in is the same, also is to be made of light-transmitting member 21, light-emitting device 22, light-receiving device 23, light-shielding wall 24, silicon rubber 26, but silicon rubber 26 only exists near light-emitting device 22.

[0076] Figure 5 In the liquid level detection device 10 of the present invention shown in , the light emitted by the light emitting device 22 passes through the silicon rubber 26 and becomes scattered light, and this scattered light is irradiated on the liquid level detection part. The light returned after being reflected by the liquid level detection part, for example, is reflected repeatedl...

no. 3 example

[0079] Next, a third embodiment of the liquid level detecting device of the present invention will be described. Figure 6 It is a sectional view of the third embodiment of the liquid level detection device of the present invention. Figure 6 Liquid level detection device 10 of the present invention shown in, and figure 2 The liquid level detection device in the same, also is to be made of light-transmitting member 31, light-emitting device 32, light-receiving device 33, light-shielding wall 34, silicon rubber 36, but silicon rubber 36 only exists in the whole inner wall of light-transmitting member 31 ( near the liquid level detection part).

[0080] exist Figure 6 In the liquid level detection device 10 of the present invention shown in , the light that reaches the non-interface between the liquid 17 and the light-transmitting member 31 is also converted into scattered light by the silicone rubber 36 . Therefore, with figure 2 Like the first embodiment shown in 5 and ...

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PUM

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Abstract

The present invention aims at attaining a liquid surface level detecting apparatus, which can be used in various detection targets and usage environments without selecting a detection target, can efficiently irradiate a light to a liquid surface level detecting unit and detect a variation in a light reception amount of a light receiving means at a high sensibility, and can be excellent in durability, easy to manufacture, and be actually used. By placing a light shielding means 14 so as not to directly irradiate the light from a light emitting means 12 to a light receiving means 13, the light from the light emitting means is scattered by an optically scattering means 16, and a part of that scattering light is radiated to an outside by the liquid surface level detecting unit on a light radiating means (an optically transmitting member) 11. On the other hand, the scattering light, which is reflected without being radiated, is received by the light receiving means, and the change in that light reception amount is detected. Consequently, if a liquid 17 exists in the outside, a light amount, which is reflected by a boundary between the liquid and the light radiating means and returned to an inside of the light radiating means, is reduced, and the light reception amount in the light receiving means is also reduced. Thus, by measuring the change in the light reception amount, it is possible to detect a liquid surface level of the liquid.

Description

technical field [0001] The present invention relates to a device for detecting the liquid level of a liquid which is contained in a container such as a storage tank, a pipe, or a barrel, and which is difficult to see from the outside. In particular, it relates to a detection device for detecting the liquid level using scattered light. Background technique [0002] Figure 7 It is a sectional view of an example of a conventional liquid level detection device using light reflection by a prism. Figure 7 The liquid level detection device 100 shown in is composed of the following various parts: a columnar light-transmitting member 102 made of fluorine-based resin or glass with one end (hereinafter referred to as a prism part 101) cut into a prescribed shape; The light emitting device 103 facing the prism part 101 and emitting light along the length direction of the light-transmitting member 102; A light receiving device 104 for returning reflected light in the longitudinal direc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F23/292
CPCG01F23/2924G01F23/2925G01F23/2927G01F23/2922
Inventor 大缠直之
Owner 大纒直之