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Optical flow measuring device and method of operation

A technology of flow measurement device and optical sensor, which is applied in the direction of measurement device, fluid velocity measurement, test/calibration device, etc., can solve the problems of calculation cost, increase the overall cost and complexity of flow measurement device, and reduce the occurrence of errors The effect of chance

Active Publication Date: 2015-07-29
FLUKE ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, these additional components add to the overall cost and complexity of the flow measurement device, and since these devices are often implemented using microprocessors, this in turn creates a computational cost

Method used

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  • Optical flow measuring device and method of operation
  • Optical flow measuring device and method of operation
  • Optical flow measuring device and method of operation

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Embodiment Construction

[0055] Referring now to the accompanying drawings, figure 1 Shown is a level sensor pair used in a flow measurement device for checking medical injection devices. figure 1 Light emitting diodes 10 (the abbreviation "LED" is used in place of "light emitting diodes" throughout) and photodetectors 12 are shown, placed on opposite sides of a vessel or pipe 14 . LED 10 and photodetector 12 are configured as a horizontal line sensor pair.

[0056] At least one other pair of level sensors is positioned on the generally vertical conduit 14 to detect when liquid 16 in the conduit 14 moves between two different levels defined by these sensor pairs. A commonly used test liquid 16 when inspecting medical injectable devices is water due to its ready availability and its inherent chemical and optical properties. Since the volume defined between these two levels is known, the flow rate can be deduced simply by dividing this known volume by the measured time for the liquid to travel between...

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PUM

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Abstract

A flow measuring device, comprising a container for receiving a flow of liquid, a plurality of optical sensors associated with the container, each of the plurality of optical sensors producing an output signal dependent upon the presence of liquid reaching a level in the container associated with each optical sensor, means for modifying the output signal in accordance with at least one predetermined temperature compensation factor, and means for calculating a flow rate from the time at which the liquid traverses between two levels in the container.

Description

technical field [0001] The present disclosure relates to flow measurement devices and methods of operating the devices. In particular, the present disclosure relates to an optical flow measurement device for inspecting medical injection devices that compensates for temperature effects on the optical sensor. Background technique [0002] When treating a patient, it is important that the patient receives the correct dose of the drug or drug, which is administered with a medical injection device. Medical injection devices have been known to the public for many years and are often used where manual administration by a healthcare professional is impractical, unreliable or prohibitively expensive. For example, medical injection devices can deliver doses at flow rates as low as 0.1 ml per hour. They can deliver doses every minute or so or pills can be delivered repeatedly on demand by the patient, up to a maximum number per hour (e.g., with patient-controlled analgesia), or they ...

Claims

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Application Information

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IPC IPC(8): G01F1/708G01P5/26G01F1/7086
CPCG01F25/00G01F1/7086G01F23/292G01F1/007G01F23/2927
Inventor M·C·布朗K·N·麦克曼
Owner FLUKE ELECTRONICS