Method and Device for the Assessment of Fluid Collection Networks

• US 20090105969A1
• Filed: 10/23/2008
• Published: 04/23/2009
• Est. Priority Date: 10/23/2007
• Status: Active Grant

• Current Assignee: David J. Saylor
• Original Assignee: David J. Saylor
• Inventors: Saylor, David J.
• Granted Patent: US 7,836,760 B2
• Time in Patent Office: Days
• US Class Current: 702/47
• CPC Class Codes: G01D 21/00 Measuring or testing not otherwise provided for
• CPC Class Codes: G01D 9/005 Solid-state data loggers
• CPC Class Codes: G01F 1/20 by detection of dynamic effects of the flow
• CPC Class Codes: G01F 1/32 using swirl flowmeters
• CPC Class Codes: G01F 1/68 by using thermal effects
• CPC Class Codes: G01F 1/684 Structural arrangements; Mounting of elements, e.g. in relation to fluid flow
• CPC Class Codes: G01F 15/063 using electrical means
• CPC Class Codes: G01F 15/0755 involving digital counting
• CPC Class Codes: G01F 23/00 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

Abstract

The improved monitoring device includes a data acquisition device with an accelerometer inside a bendable tube. One end of the tube is connected to a pole that may be secured to the top of a sewer manhole, while the other end is submerged in a fluid flow. The tilt, oscillations, and pressure exerted upon the tube due to fluid flow are measured and recorded. An improved method includes installing several monitoring devices into sewer system manholes, recording fluid level and flow, reading the recorded data, and displaying the data in chart or map form. Data may be displayed in two or three dimensional maps that may be overlaid with information of topography, street maps, and single or multiple sewer systems. Data displayed on the maps may include fluid flow rates, fluid levels, derivatives and integrals of flow rates, and differences in fluid levels or flow between monitoring devices.

Claims

1. A fluid flow monitoring and analysis device structured for monitoring a fluid flow rate within a community sanitary or storm sewer collection network, the fluid flow monitoring and analysis device being removeably secured proximate to a manhole opening in the community sewer collection network, the fluid flow monitoring and analysis device comprising:

a fastening mechanism secured proximate to the manhole opening in the sewer collection network;

a rigid pole attached to the fastening mechanism;

a flexible shaft moveable by the fluid flow, the flexible shaft including

a stationary end fixedly attached to the rigid pole and

a mobile end submerged in the fluid flow; and

a data acquisition device disposed in the mobile end of the flexible shaft, the data acquisition device including

an accelerometer for producing a tilt signal corresponding to an orientation of the accelerometer,

a pressure sensor for producing a pressure signal corresponding to a fluid pressure exerted upon the pressure sensor,

a data storage device for receiving and recording the pressure signal and tilt signal, and

a data transmission device for transmitting the pressure signal and the tilt signal to a data reader.

2. The fluid flow monitoring and analysis device of claim 1 further comprising:

the flexible shaft including a hollow core extending from the mobile end to the stationary end, the hollow core including a first diameter at the mobile end of the flexible shaft;

a cylindrical waterproof compartment circumscribed about and encapsulating the data acquisition device, a threaded end proximate to the mobile end of the flexible shaft;

an end cap with

a threaded section cooperating with the threaded end,

a pressure orifice distant from the threaded section, and

a tapered surface extending between the threaded section and the pressure orifice;

a hydrophobic fluid enclosed in a pressure tube, the hydrophobic fluid

contacting the fluid flow,

extending to the pressure orifice, and

exerting a force upon the pressure sensor of the data acquisition device.

3. A fluid monitor for monitoring and measuring a fluid flow level and velocity within a sewer collection network, the fluid monitor comprising:

a flexible shaft with an anchored end and a mobile end, the mobile end moving in response to the fluid flow level and velocity; and

a data acquisition device disposed in the mobile end of the flexible shaft, the data acquisition device including

an accelerometer generating an acceleration signal in response to a stimulus selected from a group consisting of movement of the data acquisition device and orientation of the data acquisition device; and

a data storage device for receiving and recording the acceleration signal.

4. The fluid monitor of claim 3 with the data acquisition device further comprising:

a pressure sensor detecting a pressure on the data acquisition device, the pressure sensor generating a pressure signal; and

the data storage device both receiving and recording the pressure signal.

5. The fluid monitor of claim 4 with the data acquisition device further comprising

a front compartment casing including

a first outer surface of greater circumference proximate to the mobile end of the flexible shaft,

a second outer surface of lesser circumference contacting an interior surface of the flexible shaft, and

a front face with a tube orifice, the front face extending from the first outer surface;

and

a pressure tube

passing through the tube orifice,

connecting to the pressure sensor, and

contacting the fluid flow; and

a hydrophobic fluid within the pressure tube.

6. The fluid monitor of claim 4 further comprising:

an inductively chargeable battery providing power to the data acquisition device; and

a linear generator moved by the fluid flow and providing power to the data acquisition device.

7. The fluid monitor of claim 3 further comprising:

a pole with

a top portion near a manhole accessing opening of the sewer collection network, and

a bottom portion, the bottom portion secured to the anchored end of the flexible shaft.

8. The fluid monitor of claim 7 further comprising:

the pole being attached to an expansion device secured to the manhole access opening, the expansion device including

an extendable and retractable mobile post with a post cap adapted to, in the extended position, contact the manhole access opening, and

a locking portion for maintaining the mobile post in the extended position.

9. The fluid monitor of claim 8 with the mobile shaft further comprising:

a screw-type positioning mechanism in the mobile post for adjusting the length of the mobile post,

a pivot point between the post cap and the locking portion, and

a compressible cushion in the post cap.

10. The fluid monitor of claim 8 further comprising:

a clamping device operated by a tension knob, the clamping device securing the expansion device to the pole.

11. The fluid monitor of claim 3 further comprising:

a battery providing power to the data acquisition device; and

a wireless transmission component for transferring the acceleration signal to a data reader.

12. The fluid monitor of claim 3 further comprising the mobile end of the flexible shaft further including

a plurality of thermal flow sensors both embedded in the mobile end and radially disposed about the data acquisition device, each thermal flow sensor including

a heat source thermally connected to a heat sensor in thermal communication with the fluid flow,

the heat sensor measuring a temperature

during an ambient temperature period and

during a cool down period where a rate of temperature change is indicative of a velocity of the fluid flow.

13. A method of using the fluid monitor of claim 3 comprising:

positioning the mobile end of the fluid monitor in the fluid flow before a rain event;

recording the acceleration signal to the data storage device before, during, and after a rain event; and

transferring the accelerometer signal from the data storage device to a computer readable medium.

14. A fluid monitoring system for monitoring a sewer system fluid flow within a manhole of a community sewer collection network, the manhole including a substantially vertical housing embedded below a ground level, a fluid entrance opening in the vertical housing, a fluid exit opening in the vertical housing, and a round substantially horizontal access opening above the fluid entrance opening and the fluid exit opening, the round horizontal access opening including a diameter greater than 2 feet, the fluid monitoring system comprising:

a securing mechanism secured to the vertical housing near the horizontal access opening;

a vertically oriented spanning mechanism attached to the securing mechanism;

a flexible shaft attached to the vertically oriented spanning mechanism, a portion of the flexible shaft submerged in the fluid flow; and

an accelerometer attached to the flexible shaft.

15. The fluid monitoring system of claim 14 wherein the securing mechanism includes

an extendable and retractable mobile rod with a rod cap structure, in an extended position, to contact the vertical housing near the horizontal access opening, and

a locking portion for maintaining the mobile rod in the extended position.

16. The fluid monitoring system of claim 15 further comprising:

a screw-type positioning mechanism in the mobile rod for adjusting the length of the mobile rod,

a pivot point in the mobile rod, and

a cushion connected to the rod cap.

17. The fluid monitoring system of claim 14 further comprising:

the securing mechanism being secured to the vertically oriented spanning mechanism by a clamping device operable by a rotatable knob.

18. The fluid monitoring system of claim 14 further comprising:

a pressure sensor proximate to the flexible shaft and structured for detecting a pressure.

19. The fluid monitoring system of claim 18 further comprising:

a pressure tube connecting to the pressure sensor and contacting the fluid flow, and a hydrophobic fluid inside the pressure tube.

20. A fluid monitor for monitoring and measuring the velocity of a fluid flow, the fluid monitor comprising:

an extendable and retractable expansion device securable to an access opening, the expansion device including

an extendable and retractable mobile shaft with a shaft cap adapted, in an extended position, to be secured proximate to the access opening, and

a locking portion for maintaining the mobile shaft in the extended position; and

a pole secured to the expansion device.

21. The fluid monitor of claim 20 with the mobile shaft further comprising:

a screw-type positioning mechanism in the mobile shaft for adjusting the length of the mobile shaft, and

the mobile shaft including a pivot point.

22. The fluid monitor of claim 20 further comprising:

a flexible tube with an anchored end and a mobile end, the mobile end immersed in the fluid flow and moveable by the fluid flow, the anchored end being secured to the pole and being substantially less moveable by the fluid flow than the mobile end;

a data acquisition device disposed at least partially inside the flexible tube and proximate to the mobile end, the data acquisition device including

a pressure sensor structured for detecting a pressure and generating a pressure signal; and

a data storage device for receiving and storing the pressure signal.

23. The fluid monitor of claim 22 further comprising:

a battery providing power to the data acquisition device; and

a wireless transmission component for transferring the stored pressure signal to a data reader.

24. The fluid monitor of claim 22 further comprising:

a pressure tube extending from the pressure sensor in pressure communication with the fluid flow; and

a hydrophobic fluid within the pressure tube.

25. The fluid monitor of claim 24 further comprising:

an accelerometer generating an acceleration signal in response to movement and/or orientation of the data acquisition device, and

the data storage device for receiving and storing the acceleration signal.

26. A method of using the fluid monitor of claim 22 comprising:

positioning the mobile end of the flexible tube in the fluid flow;

recording the pressure signal to the storage device before, during, and after a rain event; and

transferring the pressure signal from the storage device to a computer readable medium.