Liquid transport method and liquid transport apparatus
a liquid transport and liquid technology, applied in the direction of positive displacement liquid engines, pump control, piston pumps, etc., can solve the problem of not being suitable for mass production
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first embodiment
Liquid Transport Apparatus
General Configuration
[0044]FIG. 1 is a general perspective view of a liquid transport apparatus 1. FIG. 2 is an exploded view of the liquid transport apparatus 1. As illustrated in these drawings, a side (biological body side) where the liquid transport apparatus 1 is adhered is referred to as “down” and an opposite side may be referred to as “up” in the description.
[0045]The liquid transport apparatus 1 is an apparatus configured to transport liquid. The liquid transport apparatus 1 includes a main body 10, a cartridge 20, and a patch 30. The main body 10, the cartridge 20, and the patch 30 are separable as illustrated in FIG. 2, and are assembled integrally when in use as illustrated in FIG. 1. The liquid transport apparatus 1 is preferably used for infusing liquid stored in the cartridge 20 (for example, insulin) regularly, for example by adhering the patch 30 to the biological body. In the case where the liquid stored in the cartridge 20 is finished up,...
second embodiment
[0093]FIG. 17 is a schematic drawing illustrating an example of the pump unit 5 of a second embodiment.
[0094]In the second embodiment, a method of detecting the rotational angle of the cam 11 in Step S23 of the pump original point determination process is changed. In other words, the projecting portions 11A of the cam 11 each are provided with a position detection mark M1 such as a thin line or cross lines as illustrated in FIG. 17. The image of the cam 11 captured in Step S22 is analyzed to detect positions of the marks M1, and the rotational angle of the cam is detected on the basis of the result of detection. The reason why the position detection marks M1 are marked on the projecting portions 11A of the cam 11 is that a displacement of the marks M1 with respect to the rotation by an angle corresponding to one count of the signal ROT_A is sufficiently large because the marks M1 are apart from the rotating shaft of the cam 11, and hence the edge detection with high degree of accura...
third embodiment
[0096]FIG. 18 is a schematic drawing illustrating an example of the pump unit 5 of a third embodiment. The third embodiment will be described with reference also to FIG. 9 and FIG. 10.
[0097]In the third embodiment as well, a method of detecting the rotational angle of the cam 11 in Step S23 of the pump original point determination process is changed. In other words, positions of the fingers 22 are detected by image analysis, and the rotational angle of the cam 11 may be determined on the basis of the result of detection. As a method of detecting the positions of the fingers 22, for example, the edges of the fingers 22 are detected by using the image captured in Step S22 for example, and the rotational angle of the cam 11 may be determined from the detected positions of the fingers 22. For example, in a manner that the cam 11 reaches the reference position in FIG. 9 when the fingers 22A to 22G are at the positional relationship as illustrated in FIG. 10B, the positional relationship ...
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