RU1784884C - Device for extend length material discreet elements structure examining - Google Patents

Abstract

SUMMARY OF THE INVENTION: the controlled material passes through a comb guide with an angle of inclination of the teeth relative to the longitudinal axis 15-25, at the base of which there are inputs of a multichannel receiving element that fixes the illumination behind each element. The output signal of the multi-channel receiving element is compared with a threshold value for a given controlled element and, if it exceeds the threshold value, the comparator generates an error signal. 2 ill.

Description

The invention relates to controls and can be used to analyze discrete components of long material.

A device is known comprising lamellas with flags, each of which is associated with a corresponding discrete element of lengthy material. The flags are configured to intersect the optical axis of the optocoupler when the material breaks.

The device has a number of significant drawbacks: to monitor the condition of the material, it is necessary to hang a flag on each of its components, which leads to the drawing of the material; the device does not allow determining the structure, comparing it with the reference of each discrete element and determining which element is broken.

A device containing a illuminator, a line of optical fibers, a photodetector and an actuator is known. This device is not suitable for monitoring discrete structures, since interrogation is carried out by means of a vibration mechanism. The control is carried out by the average light transmission of the material, and not by each specific element.

Closest to the invention is a device for controlling the structure, comprising a linear illuminator and a multi-channel receiving element with a device for sequentially polling channels, a comparator, a clock with a synchronizer, a set of level switches with a switch, an error signal processing device

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This device does not allow controlling structures with various components.

The purpose of the invention is to improve the accuracy of control of multi-element materials by increasing the signal-to-noise ratio,

This goal is achieved by the fact that in the device for controlling the structure of discrete elements of long material containing a linear illuminator, guides for the material to be monitored, a small receiving element with a device for sequential channel polling, a comparator, a clock with a synchronizer, a set of level switches with a switch, an error signal processing device, while the comparator input is connected to the output of a multi-channel receiving element and a set of level sensors, its output d with an error signal processing device, and the clock generator is connected to the input of the switch of the set of level adjusters, the guides for the material being controlled are made in the form of a comb with the angle of inclination of the teeth relative to their longitudinal axes in the range from 15 to 25 °.

Figure 1 presents a structural diagram of a device; Figure 2 is a general view of the material guide.

The device consists of a comb of guides 1 of the controlled material 2 (for example, wire, metal strips, synthetic threads, etc.), inside which the ends of the optical fibers 3 are mounted, the other ends of which are connected to the corresponding inputs of the optical switch 4, the output of which is optically coupled to a photodetector 5, which constitute a multi-channel receiving element with a serial channel interrogation device. A illuminator 6 is installed above the comb of the guides. The output of the photodetector 5 is connected to the input of the comparator 7, the output of which is connected to the inputs of the indicator 8 and the actuator 9 of the machine stop connected in parallel. The threshold input of the comparator 7 is connected to the output of the switch 10, the information inputs of which are connected to a set of level switches 11, and the control inputs of the optical switch 4 and the switch 10 are connected to the corresponding outputs of the operation synchronizer 12, the input of which is connected to the output of the clock generator 13.

The shape of the guides 1 is made in such a way that when passing through its grooves of material 2, the ends of the optical fibers 3 are completely blocked and light enters them

only through material 2. For this, the bevel angle of the guides 1 relative to their longitudinal axes is within a range of 15-25 °. This angle allows the material 2 to pass through the grooves of the guide 1 with virtually no additional tension and at the same time completely block the light channel of the light guide 3.

The device operates as follows, the rewound controlled material 2 is fed into the guides 1. The luminous flux passes through the material 2 and passes through the optical fiber 3 to the input of the optical switch 4. The output of the optical switch 4 is connected to the photodetector 5. The electric signal received from the photodetector 5, carries information about the state of material 2, i.e. about its thickness

color, etc. To compare with the reference value (state of the material), a set of level switches 11 is used, the corresponding one of which is connected to the input of the switch 10, the output of which is connected

the input of the comparator 7. The interrogation of the components of the material 2 is carried out sequentially, by means of an optical switch 4, sequentially connecting the optical fibers 3 with the photodetector 5. For

control switches 4 and 10 (sequential polling of the optical fibers 3 and the corresponding connection to the comparator 7 of the master level 11) uses the synchronizer 12 of the switches, which

can be performed, for example, in the form of a counter, the input of which is connected to the output of the clock generator 13, and the counting outputs with the corresponding inputs of the switches 4 and 10.

If the signal from the comparator 7 exceeds a predetermined level, the comparator 7 gives a control action on the actuator 9 and indicator 8. The execution of the guides 1 at an angle

allows the material 2 to occupy the entire space above the light guide 3. The selected angle, in turn, does not create practically braking when the material 2 is moving. This device allows to increase

control accuracy by controlling each element making up the material and expanding technological capabilities due to the possibility of controlling the components of the material.

Claims (1)

The claims Device for controlling the structure of discrete elements of long material, containing a linear illuminator, guides for the controlled material, a multi-channel receiving element with a serial channel polling device, a comparator, a clock pulse generator with a synchronizer, a set of level switches with a switch, an error signal processing device, while the comparator input is connected to the outputs of a multi-channel receiving element and a set of level sensors, its output is connected to a testing device an error signal, and the generator pulses are connected to the input of the switch of a set of level adjusters, characterized in that, in order to increase the accuracy of control by increasing the signal-to-noise ratio, the guides for the controlled material are made in the form of a comb with the angle of inclination of the teeth relative to their longitudinal axes in the range from 15 to 25 °. L innings / Fig