SU1522425A1 - Simulator of heat image for thermovision camera - Google Patents

Abstract

The invention relates to television, more specifically to a group of test equipment of television equipment and can be used to control thermal imaging (TIR) cameras. The purpose of the invention is to simulate a thermal image continuously moving in one direction. The simulator contains a test object 1, the surface of which is combined with the object plane of the optical system 4. A heater 6 and a temperature sensor 7 are connected to test object 1, which are connected to the output and input of the thermostating unit 8, respectively. The test object 1 is made in the form of a disk with the possibility of rotation around the center. Alternating sections 2 and 3 of equal width with different radiation coefficients on the front surface of the test object form a spiral with a center coinciding with the axis of rotation of the disk. 2 Il.

Description

/

Ke yu

four;

tc

SP

S

ifiia.i

The invention relates to television, more precisely to a group of test and control devices of television (TV) equipment, and can be used to control thermal imaging (TPR) cameras using pyroelectric, vidicons as converters, during production and adjustment.

 The aim of the invention is to simulate a thermal image continuously moving in one direction inenvoi.

Fig. 1 shows a structural electrical circuit of the device; in fig. 2 - the front surface of the disk.

The thermal imaging simulator for the SAT camera (Fig. 1) contains a test. the object, made in the form of a disk ,,. A spiral formed on the surface of the disk is formed by sections 2 and 3 having different emission coefficients. The center of the helix is aligned with the axis of rotation of the disk. The mec surface of object 1 is aligned with the object ploskosti of the optical system 4, the image plane 5 is optically coupled to the object plane of the TIR of the camera. A heater 6 and a temperature sensor 7 are connected to test object 1, which are connected to the output and input of the thermostating unit 8, respectively.

The disk of the test object 1 is connected via a reducer 9 to the electric motor 10. On the front surface of the disk of the test object 1 (Fig. 2), zone 1 1 is highlighted, projected onto the target of radiation of the TPW camera (the target is aligned with the image plane 5), and the arrows show the direction of rotation of the test object 1 and the movement of the bands in the image on the target,

The test object must be made of heat-conducting material, such as brass, and have a thickness of 5-10 mm to ensure temperature uniformity. The test pattern can be made by applying coatings with a different emissivity, or by cutting a wedge-shaped groove, while the optical axis can be aligned with the axis of rotation or shifted relative to it.

The device works as follows.

but-

ten

-

15

20 t-25 st AOR

,

50

55

The test object 1 is placed in the subject plane of the optical system A, and the camera controlled by the TPR is positioned so that the target of the radiation receiver is aligned with the plane 5 of the image. To form an image with different spatial frequency, the helix pattern formed by sections 2, 3 of the surface of the test object 1 with different radiation coefficients can be performed with variable pitch or with a constant step the disk of the test object 1 can be interchangeable. The test object 1 is heated with the help of heater 6 to a predetermined temperature, which is monitored by temperature sensor 7 and maintained through; thermostating unit 8. The difference in the emission coefficients of sections 2 and 3 necessitates the radiation contrast in the image of test object 1 in plane 5. The test object disk 1 is rotated by the electric motor 10 through a gear 9. The part of the image used, limited by the size of the target of the pyroelectric vidicon, forms working area 1. The disk of the test object 1 moves the image of the bands formed by the fragments of the spiral of the test object 1 in the working area in the radial direction with a speed

;. ,, -f "p,

where LC is the spiral image step;

fgp - frequency of rotation of the disk of the test object, the invention

A thermal imaging simulator for a thermal imaging camera containing an optical system and a movable test object, on the front surface of which alternate sections of equal width with different radiation coefficients are placed, on the back surface of the test object are placed a temperature sensor and a heater, whose input is connected to the output of the thermostating unit, the input of which is connected to the output of the temperature sensor, that is, so that, in order to imitate a thermal image, continuously moving in one direction, the mobile test object is made in the form of a disk with the possibility of rotation around the center, and alternating sections of equal width with different

51522425

 radiation coefficients on the front helix with the center coinciding with the surface of the test object form a disk disk.

/ e.

Claims (1)

Claim A thermal image simulator for a thermal imaging camera, containing an optical system and a movable test object, on the front surface of which 45 alternating sections of equal width with different emissivity are placed, a temperature sensor and a heater are placed on the back surface of the test object, the input of which is connected to the output of the thermostatic control unit , the input of which is connected to the output of the temperature sensor, on the left and right. with the fact that, in order to simulate a thermal image continuously moving in one direction, the movable test object is made in the form of a disk with the possibility of rotation around the center, and alternating sections of equal width with different ³ 1522425 ° emissivity on the front spiral with the center, coinciding with the price surface of the test object form ^T P ^OM D ^claim · I Compiled by G. Rosatkevich 'Editor L. Veselovskaya Tehred L. Serdyukova Corrector, O. Zille' 'Order 6981/57 Circulation 626 Signed VNIIIPI of the State Committee for Inventions and Discoveries at the State Committee for Science and Technology 113035, Moscow, Zh-35, Raushskaya nab., D. 4/5 Production and Publishing Plant Patent, Uzhgorod, st. Gagarina, 101