SU151497A1 - Device for visual inspection of the workpiece surface with deep bore - Google Patents

Description

Devices are known for visually monitoring the surface of a workpiece with deep bore using a television set equipped with a tube with a long afterglow screen.

The described device differs from the known ones in that it is made of electrical sensors of the angle of rotation of the product and the electronic switch controlled by them, intended for supplying a short-duration beam-triggering pulse to the tube. The beam is blocked by the next frame synchronizing frame pulse.

These differences of the described device provide high accuracy of observation by obtaining on the TV screen alternately still images of individual sections of the surface of the tested product.

The drawing shows a kinematic diagram of the device described.

Sensor 1 of the angle of rotation of the product generates command pulses into two annular shift registers 2 and 3 through a valve, which, together with sensor 1, controls all circuits constituting an electronic switch. The command received from sensor 5 opens valve 4 and the impulses from sensor / go to registers 2 and 3. The register is an annular circuit, the number of bits of which is one less than the number of viewing sectors.

From each register bit 5 and conditionally received for the first, register-2 and register 2 signals are fed to coincidence circuit 6, from the output of which is given permission for the beam of the tube of video-receiving device 7 and locking the valve 4.

The beam is unlocked when there is a resolution from the coincidence circuit 6 by the next frame sync pulse, and

No. 151497-: -i -.

beam locking — subsequent frame synchronization pulse.,

Thus, on the screen of the video receiver, an image corresponding to one cadu is obtained. Due to the use of a tube with a long afterglow, the image on the screen is maintained for a time equal to the required afterglow duration.

The switching of the circuit to the review of the sequentially located sections of the test surface is carried out using the registers 2 to 3, the matching circuit 6, the valve 9 opening delay circuit, the valve 9 control circuit and the valve 4.

After the application of the n pulse from the sensor / (the n is the number of incoming pulses during the turnaround of the part), the first bits of registers 2 and 3 will go to the initial state. The signal from the coincidence circuit 6 gives permission for the unlocking of the beam and, through the valve control circuit 9, closes valve 4. A pulse from sensor 5, which follows the sensor’s n pulse, opens valve 4 through recalculation system 8 and valve control circuit 9. At high speeds rotation of the part, when the time of one revolution is menlima the duration of the screen afterglow, using the recalculation scheme 8, the pulse that opens the valve 4 is delayed by the time corresponding to the whole number of revolutions of the part. In this case, the sequence of viewing areas of the monitored surface is not exploded, and the time between frames can be chosen longer than the duration of the screen afterglow. Since the number of bits in register 2 is n-Y, and in the register it is equal to n, and the operation of circuit 6 coincides only when the bit of register 2, received conventionally but first, is in the initial state , then the signal at the output of the scheme coincides ,,., „

Nothing will appear each time through the turnover ratio at the location of the origin point at the beginning of each scanned sector.

Subject invention

A device for visually monitoring the surface of a workpiece with a deep bore using a television set equipped with a tube with a long glare of the screen, characterized in that, in order to improve the accuracy of observation by obtaining alternately still images of individual surface areas of the tested product on the TV screen electric sensors of an angle of rotation of a product and the electronic switch controlled by them intended for - giving on a tube of a short time GOVERNMENTAL gate pulse beam of which locking is performed next synchronizing frame pulse circuit.