ULTRASONIC THICKNESS GAUGE Russian patent published in 2002 - IPC

FIELD: nondestructive testing in metallurgy, mechanical engineering and other branches of industry. SUBSTANCE: invention can specifically be employed to measure thickness of structures and articles under various kinds of machining. Ultrasonic thickness gauge has synchronizer, generator of sounding pulses, integrated ultrasonic converter and receiving amplifier, quartz generator connected in series and arithmetic-logic unit and indicator connected in series. Gauge is supplemented with signal storage circuit, digital-to-analog converter and unit setting processing conditions and indicating signal. Receiving amplifier has gain factor controlled automatically. Arithmetic-logic unit comes in the form of microprocessor with function of control over preset processing condition of signals, of control over gain factor of receiving amplifier and calculation of thickness of examined object by data from coherent signal storage circuit. First synchronizing output of synchronizer is connected to input of generator of sounding pulses, controlling output of arithmetic-logic unit is coupled with control bus through digital- to-analog converter to input of control over gain factor of receiving amplifier and directly to first controlling input of coherent signal storage circuit whose signal input is connected to output of receiving amplifier. Data output/input of coherent signal storage circuit is connected with data bus to data input/output of arithmetic-logic unit and synchronizing and second controlling inputs of coherent signal storage circuit are connected to second synchronizing and controlling outputs of synchronizer whose third synchronizing output is connected to input of unit setting processing conditions and indicating signals whose activation and address outputs are connected correspondingly to activation and address inputs of synchronizer. Clock input of synchronizer is connected to output of quartz generator. Electromagnetic-acoustic converter is used in the capacity of ultrasonic converter. EFFECT: increased measurement precision, widened range of measured thicknesses. 2 cl, 2 dwg