RU2660758C1 - Moving object size control system - Google Patents

Abstract

FIELD: measuring equipment.

SUBSTANCE: invention relates to measuring equipment and can be used in machine building and metallurgy, for example, in the moving in the confined space object size measuring, in particular in the technological process, for example, to control the blanks length moving along the cold cutting saws conveyors. As a measuring sensor, the claimed moving object size control system comprises laser range finder connected to the information processing unit and mounted at an angle to the object surface, indication unit, which is connected to the information processing unit and the laser rangefinder by the communication cable, and orientation device, on which the laser range finder is rigidly fixed. At that, the laser range finder laser beam is directed to the object's movement trajectory at an angle necessary to hit the object end face.

EFFECT: enabling the moving object size measuring ability by the laser range finder orientation.

1 cl, 1 dwg, 1 tbl

Description

The invention relates to measuring technique and can be used in mechanical engineering and metallurgy, for example, when measuring the size of an object moving in a limited space, in particular in a technological process, for example, to control the lengths of workpieces moving along conveyors of cold cutting saws.

Known interference device for measuring the movement of objects (Copyright certificate of the Russian Federation No. 1663416, class G 01 B 11/16, publ. 07/15/1991, bull. No. 26), containing a device for monochromatic radiation, two dispersion prisms with a telescopic system and two reflectors, moreover, the second reflector is made in the form of a multi-stage mirror.

When the device is operating, light beams from sources are directed to a dispersion prism, after passing through which they converge into one beam, which is split by a telescopic system into a flat beam.

Next, the beam is divided by a beam splitter into two, which, reflected from the mirror and the reflector, are split by wavelengths of the dispersion prism into two beams and form interference patterns in the form of bands with different intensities.

The disadvantage of this device is that when the measurement limits are changed, the use of the active area of the light transducer changes due to the different area of the holes in the diaphragm corresponding to different measurement limits. This leads to a change in the value of the output electric signal corresponding to the measurement limit, and to a change in the characteristics of the photoelectric measurement circuit and requires calibration or additional settings.

A device is known (RF patent No. 2247936, class G 01 B 7/00, G 01 B 7/16, published March 10, 2005), which contains three identical distance sensors connected to the corresponding transducers, and an information processing unit. Two distance sensors are installed relative to the controlling object differentially, and the third is rigidly fixed at a constant and known distance from the surface of the controlled object. The information processing unit contains an addition unit, two subtraction units, three multiplication units, two division units, and a memory unit. As an informative quantity characterizing the movement of an object, the movement of a point located on one of the faces of the object is taken. The magnitude of the deformation is determined by the integral deformation of the object between its extreme points.

The disadvantage of this device is the high cost of measuring equipment.

Closest to the claimed device is a system for controlling the size of a moving object (RF patent for utility model No. 55965, class G 01 B 11/00, G 01 B 11/02, publ. 08.27.2006) containing a sensor for the presence of the object, and in Two laser range finders located on both sides and at the same level as the object are used as measuring sensors, while the rays of the laser range finders are directed towards each other and perpendicular to the direction of the object’s movement, and with the simultaneous parallel movement of 2 objects, an additional a laser rangefinder that set below the moving object, wherein the laser beam is pointing up at an angle necessary to contact the side surface of the object.

The disadvantage of this control system is the low reliability of determining the length of an object during its movement.

The technical result of the invention is the ability to measure the size of a moving object by orienting the laser rangefinder, and the laser beam is directed toward the trajectory of the object at an angle necessary to hit the end surface of the object and display the measurement results.

The technical result is achieved due to a complex for controlling the size of a moving object, containing as a measuring sensor a laser range finder connected to the information processing unit and installed at an angle to the surface of the object, an indication unit that is connected to the information processing unit and the laser range finder via a communication cable, and a device orientation, on which the laser rangefinder is rigidly fixed, and the laser beam of the laser rangefinder is directed to the trajectory of a moving object at an angle Required to hit the end surface of the object.

The invention is illustrated in the drawing.

Figure 1 shows a functional diagram that implements the proposed technical solution.

The control system for the size of a moving object contains a laser rangefinder 1, an information processing unit 2, an indication unit 3, and a device 4 for orienting the laser rangefinder.

The principle of operation of the complex is based on the use of a laser range finder, which allows the non-contact method to determine the distance to the surface of a moving object by measuring the time delay between the sent and reflected laser radiation.

The complex works as follows.

The laser range finder 1 of the complex senses the end face of a moving object (workpiece) 5 by laser radiation and measures the distance to it (end face). To ensure a mutual position between the trajectory of the object and the laser beam using the orienting device 4, the angular position of the laser rangefinder 1 relative to the trajectory of the object (workpiece) is pre-oriented. The readings of the laser range finder 1 are digitally transmitted to the information processing unit 2. The information processing unit 2 collects information about the distance from the range finder to the surface of the workpiece end face, calculates the values of its current length and transfers information to the display unit 3. Display unit 3 shows the length of the workpiece.

The complex is designed to control the lengths of each of the cut billets moving along the conveyors of cold cutting saws.

Complex implementation example

The complex includes:

- laser rangefinder;

- device for orienting the laser rangefinder

- information processing unit;

- indication unit;

- power and communication cables.

The laser range finder 1 and the orienting device 4 are rigidly fixed to each other and are located directly on the side of the cold cutting saw conveyor. The information processing unit 2 and the display unit 3 are located at the processing station and are connected to the laser rangefinder 1 by communication and power cables.

Example.

A complex for controlling the size of a moving object was developed and tested at EVRAZ Nizhny Tagil Metallurgical Plant JSC in the wheel bandage shop on cold cutting saws.

Technical characteristics of the device are shown in table 1

Table 1

Options
Value Accuracy of measuring the length of the workpiece, mm ± 3 Reliability of measurements,%, not less 95 Number of measurements on one workpiece, times, no less than 3 Ambient temperature in place
placement of laser rangefinders, ° C from 0 to 40
The orientation angle of the laser rangefinder relative to the path of the object (workpiece). 10 ° to 12º Supply voltage 220 Power consumption one hundred

The advantage of the proposed complex for controlling the size of a moving object is its high reliability and reliability of measurements when determining the length of a moving object.

Thus, the claimed technical solution fully fulfills the technical result.

The analysis of the prior art, including a search by patents and scientific and technical information and identification of sources containing information about analogues of the claimed technical solution, allowed us to establish that the applicant did not find sources characterized by features identical to all the essential features of the claimed invention.

Therefore, the claimed invention meets the criterion of "novelty."

The claimed invention can be implemented industrially in mass production using well-known technical means, technologies and materials and meets the requirements of the criterion of "industrial applicability".

Claims (1)

A system for controlling the size of a moving object, containing as a measuring sensor a laser range finder (1) connected to an information processing unit (2) and installed at an angle to the surface of the object, characterized in that it further comprises an indication unit (3), which is connected to the unit information processing and a laser range finder (1) through a communication cable, and an orienting device (4) on which the laser range finder (1) is rigidly fixed, and the laser beam of the laser range finder (1) is directed to the trajectory of the moving object Project (5) at an angle necessary to hit the end surface of the object.

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