Admixture dispensing and concrete mixer monitoring system

• US 6,042,259 A
• Filed: 03/03/1999
• Issued: 03/28/2000
• Est. Priority Date: 07/31/1996
• Status: Expired due to Term

• Current Assignee: Construction Research & Technology GmbH (BASF SE)
• Original Assignee: MBT Holding AG
• Inventors: Whitehead, Michael, Hines, Kelly
• Primary Examiner(s): Cooley, Charles E.
• Application Number:
  US09/261,672
• Time in Patent Office: 391 Days
• Field of Search: 366/1, 366/2, 366/6, 366/8, 366/16-19, 366/30, 366/33, 366/40, 366/132, 366/140, 366/142, 366/151.1, 366/34, 366/152.1, 366/182.1, 366/348, 366/349, 364/528, 364/528.1, 364/528.18
• US Class Current: 366/17
• CPC Class Codes: B28C 7/024 by measuring properties of the mixture, e.g. moisture, electrical resistivity, density
• CPC Class Codes: B28C 7/0418 control systems therefor

Abstract

An admixture dispensing and concrete mixer monitoring system which determines the correct amount of admixture, such as a stabilizer, to dispense in a load of unused concrete or for washing out a concrete mixer includes an admixture dispensing unit linked to a computer system. The computer system includes a processor which controls and monitors the operation of the dispensing unit which includes an admixture piping system and a water piping system. The processor is linked to various pumps, meters and valves in the admixture and water piping systems to control the flow of admixture and water into the concrete mixer. Additionally, the computer system provides questions and prompts to the user to assist in accurately and quickly determining the correct amount of admixture to deposit in the concrete mixer. The computer system also allows the tracking of multiple delivery or mixing trucks and their content status at multiple mixing plants to assist in the scheduling thereof.

Claims

1. A concrete mixer monitoring system comprising:

means for inputting a content status of at least one concrete mixer, wherein said content status is one of returning from a job site empty, returning from a job site with unused concrete, going to a job site and is currently empty, and going to a job site and currently contains unused concrete;

means for ascertaining the temperature of the unused concrete, if present in the at least one concrete mixer;

means for calculating at least one of a quantity of admixture, a quantity of water, and a quantity of other concrete ingredients to be delivered to the concrete mixer depending upon the content status of said concrete mixer; and

means for storing the identity and the content status of the at least one concrete mixer, and for storing the quantity of admixture, the quantity of water, and the quantity of other concrete ingredients which were calculated.

2. The concrete mixer monitoring system according to claim 1, wherein the calculating means comprises:

means for storing in look-up tables data for determining admixture quantities to be dispensed;

means for storing in memory input questions to be answered by a user;

means for processing the answers provided by the user to select which stored look-up table to access to determine admixture quantities; and

means for determining a quantity of admixture from said selected look-up table and the answers provided by the user.

3. The concrete mixer monitoring system according to claim 1 further including:

means for depositing at least one of the calculated quantity of admixture, the calculated quantity of water, and the calculated quantity of other concrete ingredients in the concrete mixer, and

means for storing the fact that at least one of the calculated quantity of admixture, the calculated quantity of water, and the calculated quantity of other concrete ingredients were deposited.

4. The concrete mixer monitoring system according to claim 1 further including:

means for retrieving from the means for storing the identity of concrete mixers stored in memory;

means for selecting from said means for storing at least one concrete mixer for use based upon predetermined selection criteria; and

means for retrieving from the means for storing at least one of the calculated quantity of admixture, the calculated quantity of water, and the calculated quantity of other concrete ingredients to be deposited in the selected concrete mixer.

5. The concrete mixer monitoring system according to claim 4 further including:

means for depositing at least one of the calculated quantity of admixture, the calculated quantity of water, and the calculated quantity of other concrete ingredients in the concrete mixer, and

means for storing the fact that at least one of the calculated quantity of admixture, the calculated quantity of water, and the calculated quantity of other concrete ingredients were deposited.

6. The concrete mixer monitoring system according to claim 4 further including means for storing the fact that at least one of the calculated quantity of admixture, the calculated quantity of water, and the calculated quantity of other concrete ingredients were deposited.

7. The concrete mixer monitoring system according to claim 1 further including means for storing the fact that at least one of the calculated quantity of admixture, the calculated quantity of water, and the calculated quantity of other concrete ingredients were deposited.