GB2231961A - Liquid level sensing circuit - Google Patents

Liquid level sensing circuit Download PDF

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Publication number
GB2231961A
GB2231961A GB8911475A GB8911475A GB2231961A GB 2231961 A GB2231961 A GB 2231961A GB 8911475 A GB8911475 A GB 8911475A GB 8911475 A GB8911475 A GB 8911475A GB 2231961 A GB2231961 A GB 2231961A
Authority
GB
United Kingdom
Prior art keywords
probes
buzzer
signal
produce
drip transfusion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB8911475A
Other versions
GB8911475D0 (en
Inventor
Wen-Bing Peng
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PENG WEN BING
Original Assignee
PENG WEN BING
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by PENG WEN BING filed Critical PENG WEN BING
Priority to GB8911475A priority Critical patent/GB2231961A/en
Publication of GB8911475D0 publication Critical patent/GB8911475D0/en
Publication of GB2231961A publication Critical patent/GB2231961A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/16831—Monitoring, detecting, signalling or eliminating infusion flow anomalies
    • A61M5/1684—Monitoring, detecting, signalling or eliminating infusion flow anomalies by detecting the amount of infusate remaining, e.g. signalling end of infusion
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
    • G01F23/241—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid for discrete levels
    • G01F23/242—Mounting arrangements for electrodes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
    • G01F23/241—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid for discrete levels
    • G01F23/243—Schematic arrangements of probes combined with measuring circuits
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/18—General characteristics of the apparatus with alarm
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3317—Electromagnetic, inductive or dielectric measuring means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3379—Masses, volumes, levels of fluids in reservoirs, flow rates
    • A61M2205/3386—Low level detectors

Landscapes

  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Anesthesiology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Vascular Medicine (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

A circuit for connection to liquid level sensing probes (4) includes an IC driving a buzzer to produce an audio alarm signal when the probes are not in contact with the liquid. The IC is powered by a battery V via a current limiting resistor R. The probes may be mounted in a drip transfusion bottle or a flower vase. <IMAGE>

Description

TITLE Drip transfusion bottle alarm device BACKGROUND OF THE INVENTION The present invention is to provide a drip transfusion bottle alarm device to automatically produce an audio alarm signal when the drip transfusion solution is fully consumed.
Regular hospitalized patients commonly have to take drip transfusion treatment. Because drip transfusion takes several hours each time, the patient or the family of the patient may be unaware of the dangerous that the transfusion solution has been completely consumed. In order to prevent from any accidents, the patient or the family of the patient shall have to keep watching the performing of the drip transfusion. However, to keep watching the performing of a drip transfusion is time-consuming and strenuous because a drip transfusion process requires several hours to complete.
SUMMARY OF THE INVENTION The main object of the present invention is to provide a drip transfusion bottle alarm device which includes a pair of probes set at the inner bottom of a drip transfusion bottle to detect the solution level so as to give an IC with a signal to drive a buzzer to produce audio alarm signal when the probes are not in contact with the solution.
Another object of the present invention is to provide a drip transfusion bottle alarm device which may be used to match with vase or the like to detect the water level and provide an audio alarm signal automatically when the water is reduced to a predetermined level.
The above and other objects, features and advantages of the present invention may be fully understood from the following detailed description of the preferred embodiments considered in connection with the annexed drawings as hereunder.
BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a control circuit of the present invention.
Figure 2 is an enlarged schematic drawing of the present invention.
Figure 3 illustrates the application of the present invention to match with a drip transfusion bottle.
Figure 4 illustrates the application of the present invention to match with a vase.
CODES (1) IC (2) Mercury dry cell (3) Resistor (R) (4) Probe (5) Buzzer (6) Drip transfusion bottle (7) Vase (8) PC Board DETAILED~DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to Figures 1 and 2, a drip transfusion bottle alarm device is including a PC board (8) for mounting thereon of an IC (1), a mercury dry cell V (2) to provide the IC (1) with necessary working power, a resistor R (3) connected to the IC (1) in series to limit the current, a buzzer X (5) connected to the IC (1) in parallel to provide audio sound signal, two probes (4) connected to the two input terminals of the IC (1) to project therebeyond.
When the two probes (4) are set in a water solution during operation, the IC (1) receives no signal input. Therefore, no output is produced from the IC (1), and the buzzer X (5) does not produce audio sound signal. When one or both of the two probes (4) leave away from the water solution, a signal will be received by the IC (1) through its input terminals. Thus, the IC (1) will provide an output signal to drive the buzzer X (5) to produce an audio sound of alarm signal.
When the present invention is used to match with a drip transfusion bottle (6) as shown in Figure 3, the probes (4) are directly inserted into the bottle (8) and set at the inner bottom. As soon as the drip transfusion solution is reduced to a level below the position of the probes (4), the IC (1) will immediately produce a signal to drive the buzzer (5) to give an audio alarm signal to give warning.
The present invention may be used to match with a vase (7) as shown in Figure 4. In this embodiment, the probes (4) are inserted into the vase (7) and positioned at the inner bottom area to detect the water level in the vase (7). If the vase (7) is made of harden material through which the probes (4) couldn1t penetrate, the conductor pins of the probes (4) may be extended to let the probes (4) be set inside the vase (7) at the inner bottom from the top opening, as indicated in the dotted lines. When the water level drops down to a position below the proves (4), the IC (1) will immediately drive the buzzer (5) to produce an audio alarm signal.
In conclusion, the present invention is to provide such an alarm device to automatically give an audio alarm signal as soon as the water level drops down to a position below the probes of the present invention which were set in the water.

Claims (1)

  1. What is claimed is:
    Wlat~is~claimed is A drip transfusion bottle alarm device, including a PC board having mounted thereon an IC, a mercury dry cell V to provide said IC (1) with necessary working power, a resistor R to connect to said IC in series to limit the current, a buzzer X to connect to said IC (1) in parallel to provide audio sound signal, two probes to connect to the two input terminals of said IC to project therebeyond, wherein the said two probes which are set in a water solution produce a signal to said IC when they are not in contact with the water solution, so as to further drive said buzzer to produce an audio alarm signal.
GB8911475A 1989-05-18 1989-05-18 Liquid level sensing circuit Withdrawn GB2231961A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8911475A GB2231961A (en) 1989-05-18 1989-05-18 Liquid level sensing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8911475A GB2231961A (en) 1989-05-18 1989-05-18 Liquid level sensing circuit

Publications (2)

Publication Number Publication Date
GB8911475D0 GB8911475D0 (en) 1989-07-05
GB2231961A true GB2231961A (en) 1990-11-28

Family

ID=10656988

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8911475A Withdrawn GB2231961A (en) 1989-05-18 1989-05-18 Liquid level sensing circuit

Country Status (1)

Country Link
GB (1) GB2231961A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2246438A (en) * 1990-07-28 1992-01-29 Fisher Thomas James A water level warning device
GB2277592A (en) * 1993-05-01 1994-11-02 Robert Delster Jordan Water overflow detector/alarm
WO2001021132A1 (en) * 1999-09-21 2001-03-29 Kevin Orton Apparatus for electrically preparing injectable substances
EP1666018A1 (en) * 1999-09-21 2006-06-07 Kevin R. Orton Container for electrically preparing injectable substances

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1548895A (en) * 1975-04-14 1979-07-18 Edwards H J Infusion fluid level detector
EP0008508A1 (en) * 1978-08-23 1980-03-05 LUCAS INDUSTRIES public limited company Liquid level sensing apparatus
GB2034040A (en) * 1978-11-11 1980-05-29 Hibbing Ltd Improvements in or Relating to Liquid Level Alarms
GB2065336A (en) * 1979-11-23 1981-06-24 Mackenzie J R S Automatic level control system for an oil contaminant
GB2074545A (en) * 1980-04-22 1981-11-04 Abdul Al Razak M F Liquid dispensing apparatus
GB2166870A (en) * 1984-07-30 1986-05-14 Dominic N Loiacono Liquid level detection

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1548895A (en) * 1975-04-14 1979-07-18 Edwards H J Infusion fluid level detector
EP0008508A1 (en) * 1978-08-23 1980-03-05 LUCAS INDUSTRIES public limited company Liquid level sensing apparatus
GB2034040A (en) * 1978-11-11 1980-05-29 Hibbing Ltd Improvements in or Relating to Liquid Level Alarms
GB2065336A (en) * 1979-11-23 1981-06-24 Mackenzie J R S Automatic level control system for an oil contaminant
GB2074545A (en) * 1980-04-22 1981-11-04 Abdul Al Razak M F Liquid dispensing apparatus
GB2166870A (en) * 1984-07-30 1986-05-14 Dominic N Loiacono Liquid level detection

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2246438A (en) * 1990-07-28 1992-01-29 Fisher Thomas James A water level warning device
GB2277592A (en) * 1993-05-01 1994-11-02 Robert Delster Jordan Water overflow detector/alarm
WO2001021132A1 (en) * 1999-09-21 2001-03-29 Kevin Orton Apparatus for electrically preparing injectable substances
EP1666018A1 (en) * 1999-09-21 2006-06-07 Kevin R. Orton Container for electrically preparing injectable substances

Also Published As

Publication number Publication date
GB8911475D0 (en) 1989-07-05

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)