MULTICHANNEL DEFORMATION RECORDER Russian patent published in 2018 - IPC G01B7/16 

FIELD: measuring equipment.

SUBSTANCE: invention relates to a measuring technique, namely to means for measuring relative deformations. Multichannel deformation recorder, each channel of which contains a deformation sensor in the form of a strain gage, which is part of the bridge circuit, an analog-to-digital converter and an internal power supply, characterized in that in each channel the strain gage is included in the Wheatstone measuring bridge circuit, in addition, a spark protection barrier for supplying the Wheatstone bridge circuit consisting of a series-connected fuse, limiting and ballast resistors, two bi-directional voltage regulator diodes, the first terminals of which are combined and connected to the second terminal of the limiting resistor and the first terminal of the ballast resistor, and the second outputs of bidirectional voltage regulator diodes are combined and connected to the negative terminal of the internal power source, to the positive terminal of which the first fuse terminal is connected, the outputs of the spark protection barrier for feeding the Wheatstone bridge circuit are connected to a single diagonal of the Wheatstone bridge circuit, the other diagonal of which is connected to the corresponding inputs of the analog-to-digital converter, also the first and second spark-proof barriers are introduced into the recorder, the input of the first of which is connected to the output of the personal computer, and the output is connected to the corresponding inputs of the analog-to-digital converter of each channel, the input of the second spark-proof barrier is connected to the corresponding terminals of the external power supply, and the output is connected to the corresponding inputs of the internal power supply and the corresponding inputs of the analog-to-digital converter of each channel, the first and second spark-proof barrier including a fuse whose first terminal is connected to the positive input terminal of the barrier, a second terminal connected to the first terminal of the resistor, the second terminal of which is connected to the first terminals of two bi-directional voltage regulator diodes, the second terminals of which are combined and connected to the negative terminal of the spark protection barrier.

EFFECT: increase the accuracy of measurements of relative deformations in the region of small amplitude values and provide protection against the transition of the supply network voltage in the circuit connecting the logger and the strain gauges.

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