SU185576A1 - DEVICE FOR VERIFICATION OF FILM MATRIXES - Google Patents

Description

A device for testing film matrices is known comprising a measuring head, a probe and a detachable conductor.

The proposed device is characterized in that it is equipped with a heat insulating chamber, an electric heater with a winding made in the form of a toroid, and a pantograph mechanism with a pattern. The removable conductor is mounted on the measuring head together with the probe.

This makes it possible to increase the accuracy of checking the matrices, check them in a wide range of temperatures, and reduce interference with the removal of signals from films.

FIG. 1 shows schematically an apparatus for inspecting film matrices; in fig. 2 - device table; in fig. 3 - measuring head; in fig. 4 - pantograph.

The device contains a heat insulating chamber / to obtain a temperature of -f-60 ° C inside it. The chamber is made of two aluminum enclosures 2 and 5 inserted one into the other, between which the heat insulating material 4 is laid. The door 5 is tightly closed.

A cross 7 is fastened on the frame 6. A table 8 slides along the bottom base of the frame. The cross serves to transmit a rotational movement to the measuring head 9 through sector 10 from the drive 11 and for supplying and discharging the measuring head to the table and from it using a screw 12. Cable 13 passes inside the cross and connects the measuring head to the electrical measuring equipment. On the table is placed the matrix 14, heated to a temperature of -j-180 ° C. The matrix is placed on the copper pad 15 and pressed against the four stops 16 by a spring 17. On the surface of the pad the slides

contacts 18 and 19 of the measuring head (Fig. 3).

The winding of the heater 20 is made in the form of a toroid, which allows the matrix to be free from external magnetic fields. To fix the temperature of the matrix in the pillow 15 of the thermocouple 21.

The table is rigidly connected to the pantograph 22 through the rack 23. Inside it, pins 24, 25 from the thermocouple and the heater are placed. Under the action of the pantograph, the table moves with the heat shield 26, which isolates the internal cavity of the chamber from the environment.

The measuring head (Fig. 3) serves

for applying magnetic fields to the magnetic elements of the matrix and removing signals from them. The head is easily removed and put on the crosspiece to replace the probe 27.

magnetic elements. The probe is two, located at an angle of 90 °, copper busbars 28, 29, glued to the fluoroplastic core 30 and placed in a copper screen 31. There are slots in the working part of the tire.

Removable conductor 32 is fastened in two clamps 33 and 34. Clamp 33 tensions the conductor, and clamp 34 installs it in the center of the probe. One end of the detachable conductor is soldered to the high-frequency connector 35 with contact 18, the other to contact 19. The removable conductor is installed parallel to the table surface by an eccentric 36. Six high-frequency connectors 38 are located in the housing 37 to connect the probe to the measuring equipment.

The design of the measuring head allows simultaneous rotation of the probe and the detachable conductor relative to the matrix spot.

The pantograph 22 (Fig. 4) serves to supply the magnetic elements of the matrix under the probe of the measuring head. It consists of two systems of levers 39, 40 mounted on the plate 41 and interconnected by a carriage 42. The removable template 43 mounted on the plate is a checked matrix 5 times as large. The system of levers 39 transfers the movement of the lock 44 according to the pattern 43 to the carriage 42, reduced 5 times. A system of levers 40 performs parallel movement of the carriage. The pantograph is rigidly attached to the bottom of the chamber.

A coil 45, consisting of four pairwise connected windings, eliminates the earth's magnetic field around the array. Sector 10 and actuator 11 serve to rotate the measuring head relative to the matrix dot by an angle of + 25 °. The sector has a scale 46, with divisions for reading the angle of rotation of the head with an accuracy of +30.

A measuring head is removed to eliminate the earth’s magnetic field inside the chamber.

A compass is placed on the table and a current is passed through the roller 45, and the compass needle must be in an indifferent position. The tested matrix is placed on the table, the measuring head is brought to it by the screw 12 so that there is no more than 0.2 mm gap between the matrix and the detachable conductor. The pins 18, 19 of the head should touch the nodushchiki table. The sector scale is set to " O and, selecting any magnetic matrix element by the template, brings it under the gauge using a pantograph.

Then turn on the electrical part of the installation and, turning the sector, experience the magnetic element of the matrix. Moving the pantograph retainer according to the pattern, the whole matrix is tested.

If it is necessary to check the matrix at a temperature of + 180 ° C, turn on the heater

0 table, and at -60 ° C dry ice is put in box 47, the door of the chamber is tightly closed and liquid nitrogen is periodically poured through the opening in the chamber until the temperature in the chamber –BOC is obtained. The opening in the chamber is closed with a stopper 48 and a flap 49.

Subject invention

A device for checking film matrices containing a measuring head, a probe and a detachable conductor, characterized in that, in order to increase the accuracy of the test

matrices, the possibility of testing them in a wide range of temperatures and reducing noise when removing signals from films, it contains a heat-insulating chamber, an electric heater with a winding and a pantograph mechanism with a template, the detachable conductor mounted on the measuring head together with a probe, and the winding the heater is made in the form of a toroid.

f (6

9

VIVA

I f

35

18 34

38

9

il

l

“/ //

43

ltU