Concrete sensor system

Patent metadata

Field	Value
Publication number	US-11897167-B2
Application number	US-202218074899-A
Country	US
Kind code	B2
Filing date	Dec 5, 2022
Priority date	Jan 17, 2019
Publication date	Feb 13, 2024
Grant date	Feb 13, 2024

Abstract

A mixer vehicle includes a mixer drum, a first acceleration sensor, a second acceleration sensor, and a controller. The first acceleration sensor is configured to produce first acceleration signals and the second acceleration sensor is configured to measure accelerations within the mixer drum to produce second acceleration signals. The controller is configured to receive the first acceleration signals from the first acceleration sensor and second acceleration signals from the second acceleration sensor. The controller is further configured to determine a presence of material within the mixer drum based on the first acceleration signals and the second acceleration signals. The controller is further configured to determine one or more properties of the material within the mixer drum based on the first acceleration signals and the second acceleration signals.

First claim

The invention claimed is:

1. A mixer vehicle comprising:
a mixer drum;
a first accelerometer and a second accelerometer, wherein the first accelerometer is configured to produce baseline acceleration signals and the second accelerometer is configured to measure accelerations within the mixer drum to produce disturbed acceleration signals; and
a controller configured to:
obtain the baseline acceleration signals and the disturbed acceleration signals from the first accelerometer and the second accelerometer as the mixer drum rotates;
determine an amount of noise in the disturbed acceleration signals relative to the baseline acceleration signals based on a comparison between the baseline acceleration signals and the disturbed acceleration signals; and
use the amount of noise in the disturbed acceleration signals to determine a presence of material and one or more properties of the material within the mixer drum.

2. The mixer vehicle of claim 1 , wherein the one or more properties include a degree of homogeneity of the material, a slump of the material, and a consistency of the material.

3. The mixer vehicle of claim 2 , wherein the controller is further configured to:
determine the slump of the material based on an amount of noise in the disturbed acceleration signals using an empirical relationship that defines slump of the material as a function of the amount of noise; and
use the consistency of the material to determine whether water should be added to or removed from the material.

4. The mixer vehicle of claim 1 , wherein using the amount of noise in the disturbed acceleration signals to determine the presence of the material comprises determining the presence of material based on a signal to noise ratio of the disturbed acceleration signals.

5. The mixer vehicle of claim 1 , wherein the controller is further configured to determine an entry angle and an exit angle of the material within the mixer drum based on the baseline acceleration signals and the disturbed acceleration signals.

6. The mixer vehicle of claim 5 , wherein the controller is further configured to determine any of a volume, and a weight based on the entry angle and the exit angle of the material.

7. The mixer vehicle of claim 6 , wherein the controller is further configured to validate the weight of the material within the mixer drum by comparing the weight determined based on the entry angle and the exit angle of the material to a weight determined by a concrete buildup algorithm.

8. The mixer vehicle of claim 6 , wherein the controller is further configured to use the weight of the material to adjust an operation of one or more systems or devices of the mixer vehicle.

9. The mixer vehicle of claim 1 , wherein the second accelerometer is positioned inside of the mixer drum and passes through the material as the mixer drum rotates, the second accelerometer producing the disturbed acceleration signals as a result of passing through the material; and
wherein the first accelerometer is positioned outside of the mixer drum.

10. The mixer vehicle of claim 1 , wherein the controller is further configured to determine at least one of an orientation and an angular speed of the mixer drum based on at least one of the baseline acceleration signals and the disturbed acceleration signals.

11. The mixer vehicle of claim 10 , wherein the controller is further configured to automatically adjust an orientation of the mixer drum based on the orientation such that a solar panel disposed on the mixer drum points in an upwards direction.

12. The mixer vehicle of claim 1 , wherein the first accelerometer and the second accelerometer are positioned on a probe, wherein the probe comprises a urethane cover.

13. A sensing system for a concrete mixer vehicle, the sensing system comprising a processing circuit configured to:
obtain baseline acceleration signals from a first accelerometer and disturbed acceleration signals from a second accelerometer, wherein the second accelerometer is positioned within a mixer drum of the concrete mixer vehicle and produces the disturbed acceleration signals;
determine an amount of noise in the disturbed acceleration signals relative to the baseline acceleration signals based on a comparison between the baseline acceleration signals and the disturbed acceleration signals; and
use the amount of noise in the disturbed acceleration signals to determine a presence of material and one or more properties of the material within the mixer drum.

14. The sensing system of claim 13 , wherein the one or more properties include a degree of homogeneity of the material, a slump of the material, and a consistency of the material.

15. The sensing system of claim 14 , wherein the processing circuit is further configured to:
determine the slump of the material based on an amount of noise in the disturbed acceleration signals using an empirical relationship that defines a slump of the material as a function of the amount of noise; and
use the consistency of the material to determine whether water should be added to or removed from the material.

16. The sensing system of claim 13 , wherein using the amount of noise in the disturbed acceleration signals to determine the presence of the material comprises determining the presence of material based on a signal to noise ratio of the disturbed acceleration signals.

17. The sensing system of claim 13 , wherein the processing circuit is further configured to determine:
an entry angle and an exit angle of the material within the mixer drum based on the baseline acceleration signals and the disturbed acceleration signals; and
any of a volume or a weight based on the entry angle and the exit angle of the material within the mixer drum.

18. The sensing system of claim 13 , wherein the second accelerometer is positioned inside of the mixer drum and passes through the material as the mixer drum rotates, the second accelerometer producing the disturbed acceleration signals as a result of passing through the material; and
wherein the first accelerometer is positioned outside of the mixer drum.

19. A method for determining a slump of a material within a concrete mixer drum, the method comprising:
providing a first accelerometer and a second accelerometer on a probe that extends into the concrete mixer drum, wherein the first accelerometer is disposed outside of the concrete mixer drum and is configured to produce baseline acceleration signals as the concrete mixer drum rotates, and the second accelerometer is disposed within the concrete mixer drum on the probe and is configured to produce disturbed acceleration signals as the concrete mixer drum rotates and the probe passes through the material;
determining an indication of an amount of noise in the disturbed acceleration signals based on a comparison of the baseline acceleration signals and the disturbed acceleration signals; and
using the amount of noise in the disturbed acceleration signals to estimate the slump of the material within the concrete mixer drum.

20. The method of claim 19 , further comprising:
adjusting an operation of the concrete mixer drum using the slump of the material within the concrete mixer drum.

Assignees

• Oshkosh Corp

Inventors

• Datema Bryan S
• Clifton Cody D
• Vagle Jarrod M
• Gong Xiang
• Wei Zhenyi

Classifications

• B28C5/422 Primary

  Controlling or measuring devices (B28C5/4227 takes precedence) · CPC title

• B28C5/4234

  Charge or discharge systems therefor · CPC title

• B28C7/024

  by measuring properties of the mixture, e.g. moisture, electrical resistivity, density · CPC title

• B28C7/026

  by measuring data of the driving system, e.g. rotational speed, torque, consumed power · CPC title

• B28C7/028

  by counting the number of revolutions performed, or by measuring the mixing time · CPC title