Lel-М /A-Line 32D (DDM-M) eng

Lel-M / A-Line 32D (DDM-M) / - a system of continuous monitoring of the technical condition of dangerous production facilities of enterprises of oil and gas, petrochemical, chemical and other industries under the jurisdiction of Rostechnadzor of the Russian Federation.

The hardware system Lel-M / A-Line 32D (DDM-M) / is implemented as a distributed system for collecting and processing diagnostic data and consists of a central computing station (DCS), electrical cabinets of electrical isolation and power supply (CSR), control modules, measuring and switching (MUIK), concentrators and a set of digital multifunctional measuring modules in explosion-proof design (IHR).

Specifications:

The main elements of the system:

The Lel-M / A-Line 32D (DDM-M) / system consists of the same type of basic devices and has a common control core based on a central computing station. The central computer station provides for the accumulation and complete analysis of all the obtained data, their display, decision making and the formation of control commands for multifunctional measuring modules and executive equipment.

A switching cabinet is a device designed to provide power and galvanic isolation of concentrators and measuring lines.
KSHGR provides galvanic isolation between the primary voltage 220V / 50Hz and the secondary DC voltage 48 V supplied to the IHR cascading line, as well as optocoupler optical isolation in the data transmission channels. The control, measurement and switching module is designed to measure analog signals from sensors, generate analog control signals for external actuators and switch (switch) measuring and actuating circuits.

Structurally, the MUIC is a holder with an installed carrier (motherboard), in which slots the channel boards are installed:

CI - measuring channel of the current loop for registration of slowly changing parameters from primary or secondary converters equipped with a current output of 4–20 mA;

KU - current loop control channel for controlling various devices equipped with current control input 4–20 mA;

КР - switching channel providing switching of external circuits with the help of a relay according to a given algorithm.

The measuring line (MSMP cascading line) is a control, synchronization, data transmission and power supply channel that provides connection of multifunctional measuring modules to a hub or a CRG.

A hub is an explosion-proof communication device that provides support for several measuring lines for connecting multifunctional measuring modules and is equipped with a high-speed digital communication channel (Ethernet) for communication with a central computing station.   A multifunctional measuring module is a device that provides galvanic isolation of measuring channels, reception of analog signals from diagnostic and parametric sensors, their conversion into digital form and subsequent processing.

Each module may contain a combination of up to three of any measurement or generation of control signals for the executive equipment:

AE - channel for registration of acoustic waves, the channel contains analog and digital frequency filters, amplifier, analog-digital converter, digital amplitude comparator, computing devices for calculating the characteristics of AE-signals;

ITP - measuring channel of the current loop for registration of slowly varying parameters from primary or secondary converters equipped with a current output of 4–20 mA;

UTP - current loop control channel for controlling various devices equipped with a 4-20 mA current control input;

MI is a bridge meter channel for measuring the deviation of resistance in the arms of a resistive bridge sensor from the initial value.

Sensors - primary converters of physical quantities into electrical signals

Acoustic emission transducers

They are used to record acoustic emission signals arising from the plastic deformation of solid media, the development of defects (cracks, microcracks, delamination, corrosion, hydrogen embrittlement, etc.), friction, leaks (passing of liquid and gaseous media through through defects).

Pressure transducers

Used to record the values ​​of overpressure, rarefaction, overpressure-discharge, absolute pressure, pressure difference and hydrostatic pressure (level) of liquid and gaseous, including aggressive media, in the test objects.

Strain gauges (strain gauges)

Used to assess the stress-strain state of the structure.

Corrosion sensors

They are used to measure the corrosion rate by the method of electrical resistance (ER - electric resistance) or by the method of linear polarization (LPR - linear polarization resistance).

Vibration sensors (vibration velocity sensors with current output)

Designed to convert into a direct current of the mean-square values ​​of vibration velocity at controlled points of installations and equipment.

Temperature sensors (resistance thermometers, thermoelectric converters)

Designed to measure the temperature of liquid and gaseous media.

Temperature sensors (resistance thermometers, thermoelectric converters)

Designed to measure the temperature of the working surface of the test object.

Comprehensive diagnostic monitoring systems (CMD) are based on several methods of non-destructive testing, ensuring the timely detection of all types of structural and operational defects in controlled areas with high accuracy.

Purpose

Increasing the level of operational safety of objects, achieved by detecting changes in the technical state in real time.
Timely detection of damage accumulation sites, determination of their nature and degree of danger.
Continuous monitoring (monitoring) of the technical condition of objects in the course of their operation based on various methods of non-destructive testing, stress-strain state, measurement of operating parameters of the technological process and tracking factors affecting the damageability of an object.