How to Level measurement?

Distance measurement method and distance measurement system,Eddy current mold level measuring device and mold level measuring method

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Level measurement refers to instrumentation techniques designed to measure the height of a fluid or solid within a containing vessel.

Distance measurement method and distance measurement system

InactiveCN106896368AHigh precisionSimple structureProgramme control in sequence/logic controllersElectromagnetic wave reradiationProgrammable logic controllerLevel measurement

The invention discloses a distance measurement method and distance measurement system, wherein the method includes the following steps: a pulse laser emits a laser signal; a photodiode APD array receives a return signal which is returned after the laser signal encounters a measured target, and transmits the received return signal to a timing chip; the timing chip determines the flight time of a rail train to the measured target according to the laser signal and the return signal, and transmits the determined flight time to a Programmable Logic Controller (PLC), and the timing chip reaches ns-level measurement accuracy; and the PLC determines distance between the rail train and the measured target according to the received flight time. The distance measurement method provided by the invention solves the technical problems of complicated measurement structure and low accuracy brought by adoption of a direct counting mode in related technologies, improves measurement accuracy, and simplifies the structure.

Owner:CRRC QINGDAO SIFANG CO LTD

Eddy current mold level measuring device and mold level measuring method

InactiveUS20160033318A1Testing/calibration apparatusLevel indicators by physical variable measurementMeasurement deviceLevel measurement

The measuring device includes: a detecting section including a coil which detects a change in a value of impedance caused by a change in a mold level; an amplifying section which amplifies an output of the detecting section; a pre-pouring calibration section which determines a reference value of a positive feedback ratio of the amplifying section in environmental conditions before pouring of molten metal; and a mold oscillation signal calibration section which obtains a standard value of difference in an output of the measuring device, the standard value of difference corresponding to a known value of amplitude of mold oscillation when the positive feedback ratio is the reference value, obtains a deviation of measurement based on a difference between the maximum value and the minimum value of the output in mold oscillation and the standard value, and corrects the positive feedback ratio within a predetermined range including the reference value.

Eddy current mold level measuring device and mold level measuring method

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Owner:NIRECO CORP

2 results about "Level measurement" patented technology

Distance measurement method and distance measurement system

Eddy current mold level measuring device and mold level measuring method

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