Predictive tube failure detection for pump

Patent metadata

Field	Value
Publication number	US-12510065-B2
Application number	US-202418436915-A
Country	US
Kind code	B2
Filing date	Feb 8, 2024
Priority date	Feb 15, 2023
Publication date	Dec 30, 2025
Grant date	Dec 30, 2025

Abstract

A pump system can include a tube disposed about a rotor. The rotor can be configured to drive fluid through the tube as the rotor rotates. The tube can be replaceable when the tube fails. The pump system can include a processor configured to determine a predicted number of revolutions of the rotor before the tube fails based on a number n of past tube failure detection (TFD) events. Each past TFD event can have a corresponding nth TFD value based at least in part on the number of revolutions the rotor had rotated before the tube failed. When n=0, the predicted number of revolutions can be set to a putative value, and when n=1, the predicted number of revolutions can be based at least in part on the first TFD value and the putative value.

First claim

What is claimed is:

1 . A pump system comprising:
a motor having a drive shaft; a pump head comprising:
a housing;
a rotor disposed within the housing and connectable to the drive shaft so as to be rotatable therewith;
a tube within the housing and disposed about the rotor, wherein the rotor is configured to drive fluid through the tube as the rotor rotates, wherein the tube is replaceable when the tube fails; and
a tube failure detection sensor, which sends a signal when a tube failure has occurred; and
a processor which is configured to receive a signal from the tube failure detection sensor and to determine the number of revolutions of the rotor before having received the signal, the processor further configured to determine a predicted number of revolutions of the rotor before the tube fails based on a number n of past tube failure detection (TFD) events, each past TFD event having a corresponding n th TFD value based at least in part on the number of revolutions the rotor had rotated before the tube failed, wherein:
when n=0, the predicted number of revolutions is set to a putative value, and
when n=1, the predicted number of revolutions is based at least in part on the first TFD value and the putative value.

2 . The system of claim 1 , wherein when n=2, the predicted number of revolutions is based at least in part on the second TFD value and the first TFD value.

3 . The system of claim 2 , wherein when n=3, the predicted number of revolutions is based at least in part on the third TFD value, the second TFD value, and the first TFD value.

4 . The system of claim 3 , wherein when n>3, the predicted number of revolutions is based at least in part on the n th TFD value, the (n−1) th TFD value, and the (n−2) th TFD value.

5 . The system of claim 1 , wherein the putative value is based at least in part on the maximum tube life.

6 . The system of claim 1 , wherein when n=1, the predicted number of revolutions is based at least in part on the average of the first TFD value and the putative value.

7 . The system of claim 1 , wherein when n=1, the predicted number of revolutions is based at least in part on the average of the first TFD value counted twice and the putative value.

8 . The system of claim 2 , wherein when n=2, the predicted number of revolutions is based at least in part on the average of the first TFD value counted twice and the second TFD value.

9 . The system of claim 4 , wherein when n>3, the predicted number of revolutions is based at least in part on the average of the n th TFD value, the (n−1) th TFD value, and the (n−2) th TFD value.

10 . The system of claim 1 , further comprising an alarm configured to warn the user when the number of revolutions approaches the predicted number of revolutions within a threshold percentage.

11 . The system of claim 10 , wherein the threshold percentage is 5% or less.

12 . The system of claim 1 , further comprising a cover sensor and a pump head cover, wherein the cover sensor is configured to detect opening of the pump head cover.

13 . The system of claim 12 , further comprising a user input interface configured to allow the user to indicate whether the tube failed and/or has been changed.

14 . The system of claim 13 , wherein when the user indicates the tube failed, the n th TFD value equals the number of revolutions the rotor had rotated.

15 . The system of claim 13 , wherein when the user indicates that the tube did not fail but has been changed, the n th TFD value equals the number of revolutions the rotor had rotated plus an additional percentage.

16 . The system of claim 15 , wherein the additional percentage is 5% or less.

17 . The system of claim 13 , wherein when the user indicates the tube failed, the n th TFD value is not recorded if the number of revolutions the rotor had rotated is not within a threshold percentage of the previous predicted number of revolutions.

18 . The system of claim 17 , wherein the threshold percentage is at least 60%.

19 . A pump system comprising:
a motor having a drive shaft; a pump head comprising:
a housing;
a rotor disposed within the housing and connectable to the drive shaft so as to be rotatable therewith; and
a tube within the housing and disposed about the rotor, wherein the rotor is configured to drive fluid through the tube as the rotor rotates, wherein the tube is replaceable when the tube fails; and
a processor configured to determine a predicted number of revolutions of the rotor before the tube fails based on a number n of past tube failure detection (TFD) events, each past TFD event having a corresponding n th TFD value based at least in part on the number of revolutions the rotor had rotated before the tube failed, wherein:
when n=0, the predicted number of revolutions is set to a putative value, and
when n=2, the predicted number of revolutions is based at least in part on the second TFD value and the first TFD value.

20 . The system of claim 19 , wherein when n=3, the predicted number of revolutions is based at least in part on the third TFD value, the second TFD value, and the first TFD value.

21 . The system of claim 20 , wherein when n>3, the predicted number of revolutions is based at least in part on the n th TFD value, the (n−1) th TFD value, and the (n−2) th TFD value.

22 . A pump system comprising:
a motor having a drive shaft; a pump head comprising:
a housing;
a rotor disposed within the housing and connectable to the drive shaft so as to be rotatable therewith;
a tube within the housing and disposed about the rotor, wherein the rotor is configured to drive fluid through the tube as the rotor rotates, wherein the tube is replaceable when the tube fails; and
a tube failure detection sensor, which sends a signal when a tube failure has occurred;
a display which is configured to display the number of revolutions of the rotor before having received the signal; a user input device which permits the user to input the number of revolutions of the rotor before having received the signal; and a processor configured to determine a predicted number of revolutions of the rotor before the tube fails based on a number n of past tube failure detection (TFD) events, each past TFD event having a corresponding n th INPUT TFD value based at least in part on the input number of revolutions the rotor had rotated before the tube failed, wherein:
when n=0, the predicted number of revolutions is set to a putative value, and
when n=1, the predicted number of revolutions is based at least in part on the first INPUT TFD value and the putative value.

23 . The system of claim 22 , wherein when n=2, the predicted number of revolutions is based at least in part on the second INPUT TFD value and the first INPUT TFD value.

24 . The system of claim 23 , wherein when n=3, the predicted number of revolutions is based at least in part on the third INPUT TFD value, the second INPUT TFD value, and the first INPUT TFD value.

25 . The system of claim 24 , wherein when n>3, the predicted number of revolutions is based at least in part on the n th INPUT TFD value, the (n−1) th INPUT TFD value, and the (n−2) th INPUT TFD value.

Assignees

• Blue White Ind Ltd

Inventors

• Murphy Patrick Michael
• Gledhill Iii Robert E
• Phan Quang
• Dinh Jonathan Trong
• Nguyen John T

Classifications

• A61M5/14232

  Roller pumps · CPC title

• F04B2201/0803

  Leakage · CPC title

• F04B43/12 Primary

  having peristaltic action · CPC title

• F04B51/00

  Testing machines, pumps, or pumping installations · CPC title

• F04B49/10

  Other safety measures · CPC title