Excreta sampling toilet and inline specimen analysis system and method

Patent metadata

Field	Value
Publication number	US-12339200-B2
Application number	US-202117800744-A
Country	US
Kind code	B2
Filing date	Feb 19, 2021
Priority date	Feb 19, 2020
Publication date	Jun 24, 2025
Grant date	Jun 24, 2025

Abstract

An excreta sample capture device includes a primary influent pipe that receives influent from a toilet(s) and includes an upstream end and a downstream end. The excreta sample capture device also includes a first valve positioned at the downstream end of the primary influent pipe, and a second valve positioned between the upstream end and the downstream end of the primary influent pipe. In some cases, an excreta sample capture device further includes spray jet positioned above the second valve and a sample extraction vessel located downstream from the second valve. A method of using an excreta sample capture device includes receiving influent in the primary influent pipe, initiating a closing of the first valve, opening the second valve, and capturing a sample of the excreta.

First claim

What is claimed is:

1. An excreta sample capture device comprising:
a primary influent pipe that receives influent from one or more toilets;
a first valve positioned at a downstream end of the primary influent pipe; and
a second valve positioned underneath and between an upstream end of the primary influent pipe and the downstream end of the primary influent pipe;
an optical imaging sensor or a camera;
a sample extraction vessel located downstream of the second valve;
a spray jet positioned above the second valve;
a controller and one or more storage media having instructions stored thereon that when executed by the controller, direct the controller to at least:
initiate closing of the first valve;
capture, via the optical imaging sensor or the camera, an image of the influent;
determine, from the captured image of the influent, a Bristol scale value of excreta within the influent;
adjust, based on the determined Bristol scale value of the excreta within the influent, a pressure of a jet of liquid provided via the spray jet;
provide, via the spray jet, the pressure adjusted jet of liquid across the excreta within the influent to cause liquification of at least some of that excreta; and
collect, via the sample extraction vessel, a sample of the excreta that is liquified by the pressure adjusted jet of liquid.

2. The device of claim 1 , wherein the instructions further direct the controller to
initiate opening of the second valve prior to collecting the excreta that is liquified by the pressure adjusted jet of liquid.

3. The device of claim 2 , further comprising:
a sensor located upstream of the second valve; and
instructions that direct the controller to receive, via the sensor, an indication that the influent containing the excreta is being received in the primary influent pipe.

4. The device of claim 3 , wherein the sensor is a turbidity sensor.

5. The device of claim 3 , further comprising instructions that direct the controller to determine, from the indication received via the sensor, a consistency of the excreta.

6. The device of claim 1 , further comprising:
a third valve positioned upstream of the first valve; and
a secondary influent pipe positioned underneath the third valve that reconnects to piping downstream of the primary influent pipe.

7. The device of claim 6 , wherein the third valve is radially adjacent to the second valve and the secondary influent pipe is sized to permit liquid, but not solids, to pass through.

8. The device of claim 1 , further comprising at least one of an optical sensor, a gas sensor, an acoustic sensor, or a thermal sensor.

9. A method of using an excreta sample capture device, comprising:
receiving influent in a primary influent pipe;
initiating a closing of a first valve positioned at a downstream end of the primary influent pipe;
capturing, via an optical imaging sensor or camera, an image of the influent;
determining, from the captured image of the influent, a Bristol scale value of excreta within the influent;
adjusting, based on the determined Bristol scale value of the excreta within the influent, a pressure of a jet of liquid provided via a spray jet positioned above a second valve;
providing, via the spray jet, the pressure adjusted jet of liquid across the excreta within the influent to cause liquification of at least some of that excreta;
opening the second valve positioned underneath and between an upstream end of the primary influent pipe and the downstream end of the primary influent pipe; and
collecting, via a sample extraction vessel positioned downstream of the second valve, a sample of the excreta that is liquified by the pressure adjusted jet of liquid.

10. The method of claim 9 , further comprising:
opening a third valve positioned upstream of the first valve until liquid from the influent has been drained from the primary influent pipe;
closing the third valve.

11. The method of claim 10 , wherein the third valve is radially adjacent to the second valve.

12. The method of claim 9 , further comprising:
closing the second valve;
opening the first valve; and
providing a sufficient amount of water to flush any remaining excreta downstream of the first valve.

13. One or more storage media having instructions stored thereon that when executed by a controller, direct the controller to at least:
in response to receiving influent in a primary influent pipe, close a first valve positioned at a downstream end of the primary influent pipe;
capture, via an optical imaging sensor or a camera, an image of the influent;
determine, from the captured image of the influent, a Bristol scale value of excreta within the influent;
adjust, based on the determined Bristol scale value of the excreta within the influent, a pressure of a jet of liquid provided via a spray jet positioned above a second valve;
open the second valve positioned underneath and between an upstream end of the primary influent pipe and the downstream end of the primary influent pipe;
provide, via the spray jet positioned above the second valve, the pressure adjusted jet of liquid across the excreta within the influent to cause liquification of at least some of that excreta; and
collect, via a sample extraction vessel located downstream from the second valve, a sample of the excreta that is liquified by the pressure adjusted jet of liquid.

Assignees

• Univ Duke

Inventors

• Grego Sonia
• Hawkins Brian T
• Sellgren Katelyn L
• Stoner Brian R

Classifications

• G06T2207/30004

  Biomedical image processing · CPC title

• G06T7/0012

  Biomedical image inspection · CPC title

• G01N2001/205

  using a valve · CPC title

• G01N1/38

  Diluting, dispersing or mixing samples · CPC title

• E03C1/26 Primary

  Object-catching inserts or similar devices for waste pipes or outlets (E03C1/28 takes precedence) · CPC title