RU98108124A

RU98108124A - METHOD FOR CONTROLING INTERNAL SURFACE OF SMOKE PIPE AND DEVICE FOR ITS IMPLEMENTATION

Info

Publication number: RU98108124A
Application number: RU98108124/28A
Authority: RU
Inventors: В.А. Акатьев; Л.Н. Тимашова; В.Я. Колючкин; В.Н. Рязанов; Г.М. Нигметов; М.А. Шахраманьян; В.И. Ларионов; А.А. Суслонов; С.П. Сущев
Original assignee: Товарищество с ограниченной ответственностью "Центр исследований экстремальных ситуаций"
Filing date: 1998-04-27
Publication date: 2000-02-10

Claims

1. A method of monitoring the inner surface of the chimney, including highlighting the inner surface of the chimney, sighting the highlighted area on the inner surface of the chimney, judging the state of the surface according to the image, characterized in that the backlight is formed by laser radiation in the form of a ring on the inner surface of the chimney, transforming the image of the highlighted section in the transverse plane of the pipe, and a judgment on the state of the surface is made by the degree and shape of distortion of the obtained annular image said transverse plane.

2. The method according to claim 1, characterized in that the backlight is moved along the longitudinal axis of the pipe while moving the transformable image.

3. The method according to claim 1, characterized in that the judgment on the state of the surface is carried out in accordance with the mathematical expression
ΔZ = ΔY / (tgα-tgβ),
where ΔZ is the true value of the depth of the defect;
ΔY is the measured value of the curvature of the annular image in the transverse plane;
α is the angle of incidence of the laser beam on the pipe surface, defined as the angle between the axis of the probe laser beam and the normal to the controlled surface of the pipe;
β is the angle of sight, defined as the angle between the direction of sight to the controlled surface of the pipe and the normal to this surface.

4. Device for monitoring the inner surface of the chimney, containing a backlight source, a video system made of at least one camera with the ability to view the image of the inner surface of the pipe, characterized in that the laser source equipped with a conical reflector of electromagnetic radiation is selected as the backlight, which are installed along the longitudinal axis of the pipe, an optical system has been introduced, configured to project an annular image of the inner surface of the pipe in its transverse w plane and introduced receiver mounted in said transversal plane of the tube.

5. The device according to claim 4, characterized in that the optical system is made of a mirror lens, a curvature compensator, a camera lens mounted along the longitudinal axis of the pipe in front of the receiver.

6. The device according to claim 4, characterized in that a lens is introduced to form a laser beam mounted along the longitudinal axis of the tube between the backlight and the conical reflector.

7. The device according to claim 6, characterized in that the backlight is made of semiconductor lasers, and the conical reflector is made in the form of elements of a system of reflectors, each of the semiconductor lasers is located at the same distance from the longitudinal axis of the pipe in one transverse plane with the possibility of laser direction beam to one of the elements of the reflector system by means of lenses for forming a laser beam mounted between semiconductor lasers and the corresponding elements of the reflector system .

8. The device according to claim 4, characterized in that an electronic processing unit is introduced, the input of which is connected to the output of the receiver and which is designed to record the video signal of the receiver or to transmit it via wired or wireless communication lines to a video monitor located outside the pipe, or for converting the video signal into digital form to assess the depth of the defect.