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Mixer waveform analysis for monitoring and controlling concrete

A technology for concrete, mixing tanks, applied in the field of information on quantities and/or properties, capable of solving the problems of wasting energy and time, premature

Inactive Publication Date: 2012-05-09
VERIFI INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If this number is greater than actually required to obtain complete mixing, unnecessary energy and time are wasted
If this number is less than actually required to obtain complete mixing, unmixed material may be discharged from the tank prematurely

Method used

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  • Mixer waveform analysis for monitoring and controlling concrete
  • Mixer waveform analysis for monitoring and controlling concrete
  • Mixer waveform analysis for monitoring and controlling concrete

Examples

Experimental program
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Embodiment Construction

[0027] As used herein, the term "cement" is meant to include Portland cement or cement that otherwise acts as a binder for binding together fine aggregate (such as sand), coarse aggregate (such as crushed stone or gravel), or mixtures thereof. Materials for Portland cement substitutes.

[0028] Such cementitious materials may further include fly ash, granulated blast furnace slag, limestone or natural pozzolan, which may be combined with Portland cement or used to replace or replace a portion of Portland cement without seriously compromising hydration properties. Incidentally, "mortar" means cement or cement mixture with fine aggregate such as sand; while "concrete" more precisely means mortar also containing coarse aggregate such as crushed stone or gravel. The term "cementitious material" may be used interchangeably with the term "concrete", as concrete is most commonly provided by ready-mix trucks with rotatable mixing tanks, but as used herein, the term "concrete" does not...

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PUM

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Abstract

Method and system for motoring and obtaining information about quantity and characteristics of cementitious material In a rotating mixing drum. The present invention involves analysis of a sequence of values corresponding to a waveform reflecting the hydraulic pressure required to turn a concrete mixing drum at successive instances during rotation. Preferred embodiments involve the conversion of this time-domain data into the frequency-domain. Behavior of multiple harmonics can be examined in real time and further information obtained regarding physical properties of the concrete. Rheology or other properties can be adjusted by introducing a liquid into the concrete, based on a comparison between time-domain and / or frequency-domain values derived from a sample concrete in the drum and previously stored time-domain and / or frequency-domain values, which are preferably correlated with physical characteristics of concrete, such as slump, slump flow, load weight, and other factors.

Description

technical field [0001] The present invention relates to the manufacture of concrete, and more particularly to monitoring and obtaining information about the amount of cementitious material in a mixing tank and / or A method by which information about characteristics can be obtained and evaluated. Background technique [0002] The "slump" or flow of concrete in ready-to-mix delivery trucks is monitored by using sensors to monitor the energy required to rotate the mixing tank (eg US 4,008,093) and / or the torque applied to the tank by hydraulic pressure (eg US 5,713,633). known. The higher the amperage or hydraulic pressure required to turn the tank at a given rate, the harder or less flowable (lower slump) the concrete mix. [0003] The automatic control system allows the regulation of slump during transport by adding water or other liquids, enabling concrete mixer trucks to transport concrete over long distances. Hydraulic pressure sensors coupled to the hydraulic transmissi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/38
CPCB28C7/026G01N33/383G05D21/02
Inventor E. 克勒S. 费尔迪诺R. 卡利
Owner VERIFI INC
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