SU786062A1 - Television device for analysis of temperature fields and objects - Google Patents

Description

a video signal allocation unit, and the second input - with the output of the strobe formation unit, and a subdetector and measuring unit connected in series to the output of the controllable key.

The drawing shows a structural electrical circuit of the proposed device.

The device for analyzing the temperature fields of the objects 1 contains a source 2 of the reference radiation, a swiveling mirror 3 transmitting a television tube (PTT) 4 a gates shaping unit 5, a color reproducing unit 6, a video signal shaping unit 7, a block 8 for allocating the water signal, a control key 9, pseudo-color conversion unit 10, video detector II, measurement unit 12, black-and-white reproducing unit (QBVB) 13, comparator AND, level setting unit 15 and signal normalization unit 16.

The psa oTaeT device is as follows.

The signal from the object under study I hits the PTT 4 input (while the pivoting mirror 3 is in such a position that it does not interfere with the radiation flow from the object I to fall on the PTT 4 input), the video signal from the PTT 4 is fed to the input of block 7 and to the input of block 8 The horizontal and vertical sync pulses from the output of ChBVB 13 are fed to the input of block 5, which produces a rectangular (strobe) signal (in the form of a bright rectangle against the image of the object on the screen of ChBVB 13. The strobe signal from the output of block 5 enters the input of block 7 whose output connect CHBVB ene with an input 13 and an input unit 10.

The video signal from the output of block 8 is fed to the first input of the control key 9, cutting out from the common video signal only that part of it which is determined by the duration and position of the strobe signal from the output of block 5. The cut video signal goes to the video detector 11 (where it is detected and amplified ) and further to the measuring unit 12.

At the same time, the video signal from the output of block 8 is fed to one of the inputs of comparator 14, the response level of which is controlled by block 15. At the output of comparator 14, a signal appears that is proportional to the excess of the amplitude of the video signal above the predetermined operation level of the comparator 14. Converted and the normalized video signal from the output of block 16 is fed to the input of block 7.

Thus, from the output of block 7 to the input of ChBWB 13 and the input of block 10, a signal is received, which (depending on the desire of the operator) can form on the crane ChBVB 13:

- Normal thermal image of the object under study 1;

- Gate square signal (in the form of a bright rectangle);

- image of areas (zones) of the object under study 1. in which the level of the signal type exceeds a predetermined level;

-any possible combinations of the listed images.

If it is necessary to measure the temperature (at a given point or area) of the object under study 1, it is possible to respectively use two modes of operation of the device.

1. Temperature measurement mode in the region bounded by the geometric contours of the bright rectangle formed by the strobe signal;

When implementing this mode, you can use two measurement methods:

- a method of directly measuring the amplitude of the video signal (proportional to the temperature of the object) within the strobe pulse using the readings of the digital measuring unit 12. and the compensation method of measurement, if necessary, to obtain high-precision temperature measurements. At the same time, the flow from source 2 and its brightness, proportional to temperature, is directed to the entrance of the PTT 4 by means of the rotary mirror 3, so that the video signal recorded by measuring unit 12 becomes equal to the selected video signal from the object under study 1. The temperature value in this case is read by source 2.

I. Temperature measurement mode using signal generation above a predetermined level using a comparator 14, block 15 and block 16, when the temperature can be read using the coarse to the exact count in block 15 (which specifies the level of the temperature to be measured).

The video signal from block 7 is also fed to block 10, which consists of a series of amplitude discriminators that extract signals of different levels from the video signal that correspond to different color shades. On the screen of the color reproducing unit 6, there may be (if necessary) a color image of the object under study 1 similar to the black-and-white image on the CHBVB 13 screen.

Claims (1)

Invention Formula A television device for analyzing the temperature fields of objects containing a transmitting television tube optically connected with the object under study and through a swiveling mirror with a source of reference radiation, a video signal generating unit whose first input is connected to the output of a transmitting television tube, and the output to a black and white reproduction unit and through a pseudo-equivalent transformation unit with a color reproducing unit, and a strobe formation unit, the input of which is connected with the output of the cheri-white reproducing About the unit, and the output with the second input of the video signal forming unit, characterized in that, in order to increase the accuracy of determining the characteristics of the temperature fields of the lenses, a block of the video signal constant component (gala, input of which is connected with the output of the transmitting television tube, the comparator, the first input of which is connected to the output of the selection block of the constant component of the video signal, the level setting block whose output is connected to the second input of the comparator, the signal normalization flea whose input to the output of the signal normalization unit is connected to the third input of the video signal conditioning unit, a control key, the first input of which is connected to the output of the video signal extraction unit and the second input to the output of the gate forming unit, and connected in series to the output of the control key is a video detector and a measuring unit. Sources of information taken into account in the examination I. Patent of Germany No. 1473258, cl. H 04 N 7/02, 1969 (prototype). / 6