초록 ▼

The method of monitoring the state of an elongated object resides in the synthesis of the characteristics of an extended line (3) of transmission of wave energy, providing for employing said line (3) as a space-distributed responsive element and also as the channel transmitting information on variat

The method of monitoring the state of an elongated object resides in the synthesis of the characteristics of an extended line (3) of transmission of wave energy, providing for employing said line (3) as a space-distributed responsive element and also as the channel transmitting information on variation of a monitored parameter of an elongated object (1). By situating said line (3) in the zone of monitoring the elongated object (1), shaping in said line (3) a reference signal of a predetermined space- and time-related pattern, and obtaining a measurement signal, the processing of these signals yields continuous distribution of the monitored parameter and a capacity of evaluating the state of the elongated object (1). The apparatus for monitoring the state of an elongated object comprises a series connection of a source (21) of modulated wave energy, a first spatial filter (23), the extended line (3) of transmission of wave energy, a second spatial filter (27), a data processing unit (22) and a video display terminal (31). The extended line (3) of transmission of wave energy is a multimode waveguide with a reference channel (13) and a measurement channel (1, 4), said channels being interactingly coupled.

대표청구항 ▼

A method of monitoring the state of an elongated object, comprising the steps of selecting an element responsive to variation of a parameter being monitored representative of the state of an elongated object (1), selecting an extended line (3) of transmission of wave energy capable of carrying the i

A method of monitoring the state of an elongated object, comprising the steps of selecting an element responsive to variation of a parameter being monitored representative of the state of an elongated object (1), selecting an extended line (3) of transmission of wave energy capable of carrying the information on variation of the monitored parameter representative of the state of the elongated object (1), integrating said selected responsive element in said extended line (3) of transmission of wave energy, locating said integrated responsive element and extended line (3) of transmission of wave energy in the zone of monitoring on a predetermined coordinate (S), along which the monitored parameter representative of the state of the elongated object (1) tends to vary, shaping and feeding, to the input of the extended line (3) of transmission of wave energy, a time-modulated reference signal transformable in the course of propagation along said line (3) in accordance with variation of the monitored parameter representative of the state of the elongated object (1), measuring the parameters of the converted reference signal at the output of the extended line (3) of transmission of wave energy, and determining the physical and mechanical characteristics of the state of the elongated object (1) on the predetermined coordinate (S), along which the monitored parameter tends to vary, in accordance with the measured parameters of the converted reference signal, which comprises the additional steps of selecting the extended line (3) of transmission of wave energy, providing for propagation of signals therein in the form of modes with known-space- and time-dependent patterns of physical fields, providing in the extended line (3) of transmission of wave energy at least one reference channel (13) and at least one measurement channel (14) with known decelerations of the phase velocities of the modes in each said channel, providing for directional interaction along the extended line (3) of transmission of wave energy in the fields of the modes in at least one reference channel (13) and in at least one measurement channel (14), depending on variation of the monitored parameter, for obtaining in the measurement channel (14) a signal varying in the course of propagation of the signal in the reference channel (13) in accordance with variation of the monitored parameter representative of the state of the elongated object (1), shaping said time-modulated reference signal in the form of time-modulated oscillation of physical fields and converting this oscillation into a signal with a predetermined spatial pattern of the fields of the modes, converting the fields of the modes at the outputs of at least one reference channel and at least one measurement channel (14) of the extended line (3) of transmission of wave energy into exclusively time-dependent electric signals for determining the physical and mechanical characteristics of the state of the elongated object (1) on the predetermined coordinate (S), along which the monitored parameter tends to vary, extracting the amplitude of the electric signal at the output of the reference channel (13), amplifying the electric signal at the output of the measuring channel (14) in inverse proportion to the value of the amplitude of the electric signal at the output of the reference channel (13), and employing linear scale transformation relating the value of the differential of decelerations of the phase velocities of the modes in the reference channel (13) and in the measurement channel (14) of the extended line (3) of transmission of wave energy to the current time of monitoring and the count of the dimension of the coordinate (S) along the extended line (3) of transmission of wave energy.