The working principle of the electronic scale is stopped by the weighing object or the truck on the weighing platform. Under the action of gravity, the electronic platform scale conveys the gravity to the sensor, resulting in the deformation of the elastomer attached to the sensor. The strain gauges and bridges on the strain girders lose their balance. The output is proportional to the weight of the electrical signal. The signal is amplified by a linear amplifier and then converted into a digital signal by A/D. The weight signal is generated by the microprocessor in the instrument. Display the weight directly after processing. After configuring the printer to print the weighing data; such as computer configuration, the number may be entered directly metered weight management system for integrated management <br> <br> look at the configuration of the electronic scales
(1) Weighing platform (load-bearing and force-transmitting mechanism) It is all mechanical systems that transfer the weight or square of the object to be weighed to the load cell, including load-bearing platform, scale bridge structure, hanging connection unit, safety limit device, etc. The market is mainly steel scales.
(2) The load cell is generally called a primary conversion element, which can convert the weight or force acting on it into a power (voltage, current, frequency, etc.) output according to a certain functional relationship (generally a linear relationship);
(3) Weighing display instrument is generally called secondary display instrument, which is used for the value of electric signal output by 2B0 quantity load sensor, and displays the weight value in pointer or digital form (modern measuring instruments also include data processing, Printing device, etc.);
A variety of mechanical feeders, including drag-chain conveyors and rotary pocket feeders, historically have been used to volumetrically control the flow of fuel to coal pulverizers on power generators. Most power generation in the United States has relied on burning fossil fuels in steam boilers, with coal as the fuel of choice. By the 1920s, pulverized-firing (the burning in suspension of finely ground coal particles) evolved as means to more complete fuel combustion and higher system efficiencies and facilitated the use of larger boilers.
In the 1950s, Arthur J. Stock (1900-1986) successfully combined the weighing and control of material flow into a single device, now known as the Gravimetric Feeder. The first installation was placed in continuous operation at Niagara Mohawk Power Corporation's Dunkirk Station in 1957.
Ralph Hardgrove, a Babcock & Wilcox retiree who joined Stock Equipment Company in 1961 (at 70 years of age), led the feeder's development into general industry acceptance by the mid-1960s, when most large coal-fired boilers included gravimetric feed systems in their design.
The first Stock gravimetric feeder operated from 1957 to 1992, to be replaced by current gravimetric microprocessor-controlled design. This feeder was donated to Stock Equipment, refitted, and refurbished for public display in the engineering plant.
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