STABILOGRAPH Russian patent published in 1997 - IPC

FIELD: medical engineering. SUBSTANCE: device has platform, sensors provided with supports which carry platform, and instrument transducers, inputs and outputs of which serve as inputs and outputs of sensors. Device has also sensor signal amplifiers, decoder, low-pass filters, analog-to-digital converter, data control, display and processing unit, inverting and operating amplifiers, adder, digital-to-analog converters programmed amplifiers, and reference voltage source. Outputs of instrument converters are connected to inputs of sensor signal amplifiers, first inputs of instrument converters are interconnected, and second inputs of instrument converters are also combined. Outputs of sensor signal amplifiers are connected to inputs of decoder the outputs of which are connected to inputs of low-pass filters. Analog-to-digital converter is connected to data control, display and processing unit, inverting amplifier input is connected to first inputs of instrument converters, and its output is connected to second inputs of instrument converters. Inverting amplifier input is also connected to operating amplifier output, the input of which is connected to adder output. Second, third and fourth inputs of adder are connected to second, third and fourth inputs of decoder and to corresponding outputs of sensor signal amplifiers. First and fifth inputs of decoder are connected to outputs of first and second digital-to-analog converters. Outputs of low-pass filters are connected to inputs of first and second programmed amplifiers, digital inputs of which are connected to SCALE bus of data control, display and processing unit, and outputs are connected to first and second inputs of analog-to-digital converter. Digital inputs of first and second digital-to-analog converter are connected to X BIAS and Y BIAS buses of data control, display and processing unit. Output of reference voltage source is connected to reference input of analog-to-digital converter, to reference input of digital-to-analog converters and to first input of adder. Instrument converter is made as tensoresistor half-bridge, and data control, display and processing unit is based on personal computer. EFFECT: higher accuracy of measurements. 2 cl, 4 dwg