SU714264A1 - Two-coordinate device for indicating flaws - Google Patents

Description

(54) TWO-COORDINATE DEVICE FOR AGMETKY DEFECTS

I

This invention relates to flaw detection and can be used in the metallurgical and machine-building industry.

According to the main author. St. N9 619846 a two-coordinate device for marking defects is known, containing markers; -, flaw detector with pre-phase -. Lem, scanner, mounted transducer, transducer position sensor, clock generator and circuits connected to it, coincidence of the marker switching circuit.

The synchronization pulse shaper is designed as a trigger counter, the capacity of which is equal to the number of markers, the decoder connected to the output of the counter, and the counting sensor connected to the outputs of the zero setting of the counter. The scanner is made in the form of a tooth-shaped disk installed with the possibility of rotation around its axis with the number of teeth cynicism

KOV and flag attached to the disk; the transducer is mounted on a disk near the shaft of the teeth, and the transducer position sensor and the origin sensor are fixed relative to the disk, which interacts with its teeth with the transducer position sensor, and the flag with the origin sensor.

Claims (1)

In the known device, the applied defect label is always constant and not associated with the product scanning step, since each switching circuit generates a pulse of a definite duration, while the corresponding sector detector is activated for the duration of the action of the Tt oro. The length of the defective mesh is chosen equal to or greater than the step. control and consider that the length of the detected defect is equal to this step, the detection by the flaw detector of shorter defects is unreliable — the defect may not fall under the flaw detector sensor. During the defectoscopy of the product in the process flow, the unequalModern and the scanning step of the items have been moved, which degrades the accuracy of the defect mark. The purpose of the design is to improve the accuracy of the defect mark. The goal is achieved by the fact that each marker switching circuit is designed as a trigger, one input of which is connected to the output of the coincidence circuit, another input - to the decoder output corresponding to this matching coincidence circuit, and the trigger output is connected to the marker. The drawing shows a functional diagram of the device. The two-coordinate device for marking a defect® contains a decoder 1, a matching circuit 2 and a marker switching circuit 3 (not shown in the drawing). Each 3 koiu ASCHMG circuit represents a trigger, one input is connected to the output of the 2 matching circuit, and the second input is connected to the corresponding coincidence circuit of the decoder 1. The output of the trigger is connected to the marker. The device works as follows. After one revolution of the flaw detector's sensor (not shown in the drawing) around the monitored product, all the triggers by the falling edge of the clock pulses, alternately coming from the decoder 1, are brought to the state when their left turns on and off. For each subsequent turn of the sensor of the dektoskop, the picture repeats — Syu:} or the pulses from the decoder 1 in the same sequence arrive on the left half of the composition of the triggers, 6d / 1 LL 1 1 1 1 1 7 44 but their position does not change (left half the triggers are already energized) and all the markers still remain off. When a signal from a defect appears, it passes through one of the 2 coincidence schemes, which is currently open at the second input by the potential from the entrance of the decoder, and enters the right half of the trigger controlling the operation of the corresponding sector marker. This trigger is overturned; its rights become half excited and turn on the marker. The trigger and the marker remain: in this position during the scan period, i.e. until the next (through one turn of the sensor, flaw detector) sync pulse arrives from the decoder to the left half of the trigger and returns it to its initial state, as a result of which the timer will turn OFF. The device will make it possible to reduce the amount of stripping of near-defective areas and repacking of controlled steel with a regulated allowable extent of the defect. Claims of the invention Two-coordinate device for marking defects according to ed. St. Ms 619846, characterized in that, in order to improve the accuracy of defect marking, each marker switching circuit is designed as a trigger, one input of which is connected to the output of the matching circuit, another input - to the corresponding output of the decryptrath corresponding to this circuit, and the output of the trigger is connected to the marker .