Device and method for detecting liquid level of infusion drip chamber

A liquid level detection and drip bucket technology, applied in flow monitors, instruments introduced into the body, etc., can solve the problems of large volume, no automatic correction function, and high cost

Active Publication Date: 2014-01-22
中电湘江数据服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the existing problems in the actual medical infusion drip funnel liquid level detection, such as too large volume, inconvenient installation, high cost, no automatic correction function, etc., the present invention prov

Method used

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  • Device and method for detecting liquid level of infusion drip chamber
  • Device and method for detecting liquid level of infusion drip chamber
  • Device and method for detecting liquid level of infusion drip chamber

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Experimental program
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Effect test

Embodiment approach 1

[0026] like figure 1 As shown, the infrared emitting tube and the infrared receiving tube are respectively installed on both sides of the dropping funnel, and the two are placed in parallel. Fix the position of the pair of tubes. In order to reduce the interference of external light and facilitate use, it can be fixed in a housing. There is a gap between the infrared emitting tube and the infrared receiving tube. When there is no other medium in the middle, the infrared emitting tube The invisible infrared light emitted by the tube can be irradiated in the infrared receiving tube in a straight line. The anode of the infrared emitting tube is connected to the positive pole of the power supply, and the other end is connected to the negative narrow pulse source through a current limiting resistor. The narrow pulse frequency is 100Hz and the pulse width is 0.5ms; through the infrared emitting tube, infrared light with a wavelength of 940nm is emitted through the gap. On the oppos...

Embodiment approach 2

[0028] When using a pair of infrared emitting tubes and infrared receiving tubes, only one liquid level can be detected accurately. Into the refinement detection, such as Figure 4 As shown, this embodiment adopts two pairs of infrared emitting tubes and receiving tubes, which can accurately detect the liquid level changes of the two layers; similarly, three or more pairs can be used to achieve more detailed liquid level detection.

[0029] A method for detecting the liquid level of an infusion dripping funnel, using the described liquid level detection device for an infusion dripping funnel, first determining the reference height of the liquid level of the infusion dripping funnel, setting an infrared emitting tube and an infrared receiving tube in parallel on the infusion dripping funnel and level with the reference height;

[0030] Input a pulse signal with a fixed frequency at the pulse input terminal through the pulse generator and emit infrared light corresponding to th...

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Abstract

The invention discloses a device and a method for detecting the liquid level of an infusion drip chamber. The device comprises a fixed shell and a detection circuit unit arranged in the fixed shell, the fixed shell is sleeved on the infusion drip chamber, the detection circuit unit comprises an infrared transmitting tube and an infrared receiving tube, the infusion drip chamber is positioned between the infrared transmitting tube and the infrared receiving tube, an infrared probe irradiates the liquid level by the aid of the principle of rectilinear propagation and refraction of light, pulse signals are transmitted and received by a corresponding receiving device, analog signals received by a pulse receiving end are sampled, and the liquid level is detected according to the received analog signals, so that the method for detecting the liquid level is high in anti-jamming capability and low in power consumption. By the aid of an error comparing and average filtering algorithm, sampling accuracy is improved, and liquid level fluctuation caused by man-made or other factors can be effectively filtered, so that the method for detecting the liquid level is high in accuracy rate and can remove liquid level fluctuation and the like.

Description

technical field [0001] The invention relates to a device and method for detecting the liquid level of an infusion drip funnel. Background technique [0002] At present, liquid level detection often adopts two forms: contact type and non-contact type: contact type such as float type, pressure type, blowing type, etc. This type of detection method is designed based on the liquid level detection of the fixed liquid tank, and generally has the following defects: 1) must contact the measured liquid or the measured container, it is not easy to install, and may cause pollution to the measured liquid; 2) the output It is an analog current or voltage, and some are displayed by mechanical pointers, which cannot be used for remote monitoring; 3) The system is generally suitable for static liquid level measurement, and it is inaccurate for fluctuating liquid level measurement caused by human interference; 4) General liquid level detection in After a certain period of time, due to the p...

Claims

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Application Information

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IPC IPC(8): A61M5/172
Inventor 杨建章刘娟胡强彭启伍科汪勋廖建平王小平曾涛任继岳
Owner 中电湘江数据服务有限公司
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