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Manufactured archtectural concrete pavers and wall blocks are growing in demand because they last longer than site- poured concrete and because they offer fantastic choices of color, shape and texture. Furthermore, concrete pavers are relatively simple to install and do not require a mason's training.
An OEM machine maker who has for years been making equipment for the concrete block industry, is addressing a quality asurance issue by integrating Acuity laser displacement sensors into a non-contact height measurement system. Using AR700 sensors (previously AR600 model), the system measures the height of molded concrete blocks as a conveyor passes them beneath a measurement archway.
The measurement environment is industrial in nature and the integrator took measures to block airborurne dust from collecting on the sensitive optics of the laser sensor. The product, called the "Blockqualifier", is placed in service downstream from the block casting machine. Uncured bricks are placed on a steel palette which is conveyed beneath the archway of the Block Qualifier system. As it passes beneath, the AR700 sensors gage the height profile of the blocks. This information is displayed on an operator's screen and processed in software algorithms to determine if they are within dimensional specification.