RU108597U1 - DEVICE FOR NON-CONTACT MEASURING LENGTH OF ROLL MATERIAL - Google Patents

Abstract

 A non-contact device for measuring the length of the rolled material, comprising a device holder, an optical measuring element and measurement processing means onto which an optical signal of an optical measuring element reflected from the rolled material is projected, characterized in that the device further comprises an input / output unit and a personal computer with operator means, in this case, an LED, a first and a second lens are used as an optical measuring element, and as a processing means For measurements, an image processor is used, with the device holder with an optical measuring element fixed motionless in close proximity to the moving roll material, the first lens focuses the light from the LED on the surface of the moving roll material, and the second lens reflects light reflected from the material to the sensor processor image processing, the output of which is connected to the corresponding input of the input-output block, the output of which is connected to the corresponding input of the PC.

Description

The utility model relates to measuring devices using optical means for measuring the length of moving objects and can be used to measure linear linear dimensions in the production and packaging of rolled products, in particular: cold rolled products, wires and cables, rubber and plastic products, textile and fabric materials , pulp and paper and non-woven material, as well as other roll materials. The scope of the utility model can be transport, storage and packaging technologies.

The invention is known "Device for measuring footage in an electric drive of a rewinding machine" (Copyright certificate No. 1781535 according to IPC G01B 7/02, BI No. 46 for 1992), containing a measuring element (in the known multi-pulse angular displacement sensor).

The known invention has all the disadvantages inherent in contact meters.

The contact principle has a number of significant drawbacks. These are low accuracy of measuring the length of moving objects, high wear of equipment, a large amount of periodic maintenance, high cost of equipment due to the presence of a large number of mechanical parts that have undergone precise metalworking. Measurement errors occur during slipping and attrition of the measuring wheel, which leads to the transfer of the excess length of the rolled material to the next link in the production cycle and, ultimately, to the customer. This disadvantage of the contact prototype is systemic, since reducing slippage due to an increase in its adhesion to a moving object on the one hand increases equipment wear and tear, on the other hand, limits the scope of its application in terms of rolled materials that may be damaged by such adhesion.

The closest in technical essence to the claimed technical solution is the invention "Device for measuring distances" (Copyright certificate No. 1776987 according to IPC G01B 11/14, BI No. 43 for 1992), containing a housing (in the claimed device holder), optical measuring element and means of processing measurements (in the known - optical converter).

A disadvantage of the known device (prototype) is that it is mainly intended for measuring fixed distances and is not suitable for measuring the length of a moving roll, and even more so for solving the inverse problem when it is necessary to measure a given any length with high accuracy.

In addition, the known device, oriented to solve a narrow special problem, is not endowed with modern PC-based automation tools, which is necessary for effective management with documentation and reporting functions in conditions of intensive and accurate production.

The technical result and the purpose of the claimed utility model is to expand the functionality of the prototype by providing non-contact measurement of the length of the rolled material while increasing the accuracy of measurement and increasing the degree of automation of the device.

The specified technical result is achieved by the fact that the device of non-contact measurement of the length of the rolled material containing the device holder, an optical measuring element and measuring processing means, onto which the optical signal of the optical measuring element reflected from the rolled material is projected, and that the device further comprises an input / output unit and a personal computer with operator means, and an LED, first and second, are used as an optical measuring element lenses, and an image processing sensor is used as a measurement processing tool, with the device holder with an optical measuring element fixed motionless in close proximity to the moving roll material, the first lens focuses the light from the LED onto the surface of the moving roll material, and the second lens, collecting the light reflected from the material feeds it to the image processing sensor processor, the output of which is connected to the corresponding input of the input-output unit, the output of which is connected busy with the appropriate PC input.

The figures 1, 2, 3, 4, and 5 respectively show: a sketch of a device, an example of a sequence of images from a roll surface, an example of embedding a device in an existing production line, an example of a block diagram of an input-output unit of an optical coordinate pointing device, and an example block diagram of an algorithm programs for measuring the length of roll material.

The device comprises (Fig. 1) an LED 1, a first lens 2, an image processor 3, an input-output unit 4, a second lens 5, a device holder 6, and a personal computer 7.

The measured moving web material 8 is not part of the device and is shown for explanation. Also for explanation, the production line 9 is shown (Fig. 3).

The non-contact measuring device for the length of the rolled material 8 comprising a device holder 6, an optical measuring element and measurement processing means onto which an optical signal of the optical measuring element reflected from the rolled material is projected further comprises an input-output unit 4 and a personal computer 7 with operator means, LED 1, first 2 and second 5 lenses are used as an optical measuring element, and a sensor is used as a measurement processing means p-processor 3 image processing, and the holder 6 of the device with an optical measuring element is fixed motionless in close proximity to the moving roll material 8, the first lens 2 focuses the light from the LED 1 on the surface of the moving roll material 8, and the second lens 5, collecting reflected from the material the light feeds it to the sensor processor 3 of the image processing, the output of which is connected to the corresponding input of the input-output unit 4, the output of which is connected to the corresponding input of the PC.

The components and materials used in the device are widely used in Russian industry.

The most complex (after PC 7) element is the sensor processor 3 (Fig. 1) of image processing, in which the author used a typical ADNS-3060 chip, which has the following technical characteristics:

Parameter Name Value Resolution dots (pixels) per inch 400-800 Image rate, frames / sec 500, 1000, 1500, 2000, 2300, 6400

The maximum possible speed, m / s 1,5 Acceleration when moving, m / s squared 150 Distance to reflective surface, mm 2.3-5.0 Recommended Operating Temperature Range 0 to 40 degrees Celsius Operating temperature limit from -40 degrees to +85 degrees Celsius

Block 4 input-output (figure 4) implements the hardware interface of standard input-output ports for direct communication with PC 7: RS 232, PS / 2 or USB.

Instead of LED 1 and lenses 2 and 5, a computer mouse-type manipulator, which is an optical pointing device, can be used as an optical measuring element. The connecting cable, which is part of the optical pointing device (manipulator), must be connected to the corresponding port of a personal computer (PC) 7.

The device operates as follows:

The holder 6 of the device is built into an existing production line directly above the (under) fixed backup roll or at the point of maximum tension (pressure) of the rolled material 8 (Fig.3). The device can be used in the original case of the manufacturer or built into the design of the production line. In this case, the holder 6 of the device must provide a rigid mount, preventing the free movement of the device in any plane, as well as damping vibration of the structure.

Figure 4 shows the structural diagram of the block 4 input-output optical coordinate-pointing device, in accordance with which a software method for measuring the length of the rolled material is implemented.

The software for measuring the length of the rolled material 8 is implemented by regular means of software libraries included in all the main high-level programming languages (C, C ++, Pascal, Borland, Delphi, etc.), since it implies maintenance of a standard pointing device connected through any of the standard ports (RS232, PS / 2, USB, HID). This is true for all common personal computer operating systems that use a mouse-type manipulator as a pointing device. Using the LED 6 and the lens 2 focusing its light, a portion of the surface of the moving material 8 is illuminated under the device. Light reflected from this surface in turn, it is collected by another lens 5 and enters the receiving sensor of the microcircuit of the sensor-processor 3 of the image processing. The image processor takes pictures of the surface at a frequency of, for example, 6400 frames / sec through an integrated image acquisition system (SPI). Each image is a square matrix, for example, 22 by 22 pixels in size, the color of each of which is encoded with 8 bits i.e. one byte, which corresponds to 256 shades of gray. Based on the analysis of the sequence of images of different contents (Fig. 2), the integrated digital signal processor (DSP) inside the microcircuit 3 calculates the increments corresponding to the relative movement of the device and the object along the X and Y axes. The values of the coordinate increments are transmitted to the input-output unit 4 which implements the hardware interface of standard input-output ports (RS232, RS / 2 or USB) for direct communication with a personal computer 7.

Further processing of the obtained information is carried out in accordance with the program used, downloaded to PC 7, for example, according to the algorithm presented in figure 5.

The software is beyond the scope of this technical solution and is not considered here. We only note that the software processing ends with the calculation of the absolute movement of the web material 8, the values and time stamps for taking into account the measured length of the web material 8 and maintaining production activity protocols (start of work, shutdowns, downtime, equipment reboot, completion of work).

The inventive device for non-contact measurement of the length of the rolled material 8 with minimal implementation costs allows you to:

make measurements on any type of surface, its color and material (cable, woven and non-woven materials, plastic, film, metal and others);

replace traditional contact wheel gauges;

to provide higher than that of the prototype, the accuracy of measuring the length of the rolled material 8 (accurate to pixel size);

reduce periodic maintenance;

reduce unproductive production waste;

increase the yield of commercial length;

to record in full the production process;

Improve process chain feedback.

Claims (1)

A non-contact measuring device for the length of the rolled material, comprising a device holder, an optical measuring element and measurement processing means onto which an optical signal of an optical measuring element reflected from the rolled material is projected, characterized in that the device further comprises an input / output unit and a personal computer with operator means, in this case, an LED, a first and a second lens are used as an optical measuring element, and as a processing means For measurements, an image processing sensor processor is used, the device holder with an optical measuring element being fixed motionless in close proximity to the moving roll material, the first lens focuses the light from the LED onto the surface of the moving roll material, and the second lens reflects light reflected from the material to the sensor processor image processing, the output of which is connected to the corresponding input of the input-output block, the output of which is connected to the corresponding input of the PC.