DEVICE FOR MEASURING GROUND DEFORMATION Russian patent published in 2017 - IPC E21C39/00 G01V9/00 

FIELD: measuring equipment.

SUBSTANCE: device for measuring ground deformation relates to the field of measuring equipment, particularly to the method of measuring the relative displacements of two points on the ground surface or selected areas of the engineering and construction structures, spaced at the considerable distances occurring due to exposure to exogenous and natural processes. The device for measuring the ground deformation consists of a rope 1 fixed to the anchor 2, which, having passed the route bends, falls onto the shaft 4 of the motor 5 through the mobile unit 3 with a large reduction ratio and the angle sensor of the shaft rotation. The motor is fixed to the housing base 5 of the device measuring system. There are always a few rope turns on the motor shaft 4, that is provided by the braked buffer coil 6 with a sufficient rope reserve capable of measuring even with significant anchor movements. The device for measuring the rope tensile force 7 is introduced in the system, by which the rope tensile force is measured. Voltage from the device for measuring the rope tensile force 7 is input to the signal processing unit 8, the output of which is connected to the input of the motor controlling unit 9, where the difference signal is formed between the digital signal from the device for measuring the rope tensile force and introduced into its memory with a value corresponding to the particular threshold force value F₀ - the predetermined small tensile force. The outputs from the unit 9 are connected respectively to the motor 5 and the signal converting unit 10 from the motor controlling unit by the value of the anchor movements. Calculation of the anchor movement values is carried out in the output signal converting unit 10 from the unit 9 by the value of the anchor movements. An encoder 11 is introduced into the measuring circuit to obtain an independent information about the anchor movements, connected to the input of the signal converting unit 12 from the encoder by the value of the anchor movements. The outputs of the units 10 and 12 are connected to the input of the signal comparing unit 13, in which conclusion on the danger degree of the developing processes is made based on the data analysis of the deformation values and due to the geological features of the observation object.

EFFECT: improving the measurement accuracy.

1 dwg