DD141200A1 - THERMAL RADIATION METER AND HEAT RADIATION MEASURING SYSTEM - Google Patents

Description

1 0 1 26

7.5.1979 54 537/17

W armestrahlmessmesser and Warmestrahlmigsmeßsystem Anwendungsgeb eet the invention

The invention relates to the temperature measuring technique and in particular relates to heat radiation meter.

The present invention can be used successfully in various fields of economics, such as' temperature measurements of flame, plasma, and Plussigkeits-. Radiation and gas streams, in the power measurement of the laser radiation, are applied. , ·

Characteristic of the known technical solutions

At present, there are a variety of technological processes in which a laser beam for welding, cutting, heat treatment u. Ä. Is exploited. The successful realization of these processes often requires accurate metering of the power of a laser beam. In this case, a control of the radiation power without interruption of the laser beam is required.

It is a heat radiation meter (US-PS 3282100, Kl. 73-190,

210 1

7.5.1979 54 537/17

1966), which includes a sensing element brought into a radiant heat, to which a recording device for a change in temperature of the sensing element is connected under the action of heat radiation In the relevant knife, the sensing element is in the form of a tangle of entangled electroconductive thread which is fixed immovably and to which a heat ray, for example a laser beam, is directed After the change in the electrical resistance of the current-conducting filament, the value of the power of the laser beam to be measured is determined.

In the present device, however, the power measurement of the laser beam is accompanied by a complete interruption of the laser beam, which is inadmissible in a number of cases, v / eil this measurement method leads to the interruption of the workflow »

In addition, measurements can be made only with a low power of the laser beam, because the thread is overheated and the sensing element fails »

In addition, the sensing element in the measuring device concerned is influenced by the external conditions (for example by air movement, accidental contamination).

A measurement of the density distribution of the heat radiation power in the cross section of the beam can not be made either.

210 1

7.5.1979 54 537/17

Zie l of the invention

The aim of the present invention is to improve the control of the technological processes using thermal radiation.

Explanation of the essence of the invention

The invention has for its object to provide a heat radiation meter, the structural design allows it to increase the accuracy of the heat radiation in continuous operation and the reliability of the device au.

According to the invention, the object is achieved in that in the heat radiation meter, which contains a brought into a warm ray sensing element 'is connected to a recording device for Temperatüränderung the sensing element under the action of heat radiation, according to the invention, the sensing element with the possibility of displacement is arranged at a stabilized speed in the heat beam.

Suitably, the heat radiation meter includes a drive with a Ausgangsv / elle, whose axis of rotation is transverse or along the heat ray and on which the sensing element is arranged.

The heat radiometer contains a sensing element carrying the main disc, which sits perpendicular to the axis of rotation on the output shaft of the drive »

'7.5.1979 54 537/17

In addition, it is expedient that in the 7 / ärmestrahlungsmesser, in which the sensing element is designed in the form of an electrically conductive thread, the current-conducting thread according to the invention in the plane of rotation of the main disk is wavy bent and arranged on the circumference.

In the case of the arrangement of the axis of rotation of the output shaft of the drive transverse to the heat radiation of the heat radiation meter is a tube in which the heat radiation is included, and provided with the possibility of rotation on this tube element and a rigidly connected to the element and the drive console provided ,

In addition, it makes sense that in the case of the arrangement of the axis of rotation of the output shaft of the drive transverse to the heat radiation of the heat radiation meter includes an additional disc which sits on the output shaft of the drive parallel to the main disc and to which the sensing element is attached, wherein the distance between the main - and the additional disc exceeds the cross section of the heat ray »

It is desirable that in the heat radiation meter in which the sensing element is in the form of an electrically conductive thread, the current conducting thread according to the invention in a zigzag between the main and the additional disc is stretched.

The main and additional discs are made of dielectric.

In the case of the arrangement of the axis of rotation of the output shaft of the drive along the heat ray is the sensing element

5 -210 1

7.5.1.979 54 537/17

in the form of at least one strip. This is made of a material in which the longitudinal dimensions change with temperature, wherein the width of the strip is smaller than the cross section of the heat ray, the length of the strip is greater than the cross section of the heat ray and the plane of the strip itself perpendicular to the axis of rotation of Output shaft is located. As a register for a Temperaturänderung a longitudinal motion encoder for measuring a deformation of the strip in the axial direction of the output shaft of the drive is utilized. -.

The strip can also be made of bimetal.

In addition, it is useful 'that in the case of the embodiment of the sensing element in the form of a strip, the arrangement of the strip on the output shaft of the drive by means of a bracket which is rigidly mounted on this output shaft in such a way that the ends of the strip on the bracket are fixed and the center of the strip 3 is contacted as its fulcrum with the input of the encoder for a longitudinal movement, wherein the strip shields the bracket from the heat radiation.

In the same embodiment of the Pühlelementes the strip or the plurality of strips can be rigidly fixed at one end to the output shaft of the drive and the encoder can for longitudinal movement arranged at the free end of the strip mirror on which a light beam from a radiator for a light beam is directed "and one in the beam path of a reflected light

210 1 26

7.5.1979 54 537/17

Bündeis lying reading scale included «

As a mirror, it is preferable to utilize a polished surface formed at the free end of the strip.

To determine the heat radiation energy distribution over the cross section of the heat radiation, a heat radiation measuring system is used, which according to the invention comprises at least three 7 / poor radiation meters.

The present invention provides the function in continuous operation, also reduces the residence time of the FUhI element in the heat radiation zone and increases the intensity of its cooling, which further increases the reliability of the thermal radiation meter.

In addition, the present invention ensures such a rotational speed of the sensing element, which eliminates the influence of the measurement accuracy for the heat radiation by random air currents and ambient temperature fluctuations at the site of the heat radiation meter.

In addition, the present invention makes it possible to change the rotational speed of the Eühlelementes to detect a large power range of the heat radiation.

Execution at play

The invention will be explained in more detail below using an exemplary embodiment. In the accompanying drawings show:

2 1 O 126

7.5.1979 54 537/17

1i is an overall circuit diagram of the heat radiation meter with a main disk;

Pig. 2: a view in the direction of arrow A of FIG. 1;

FIG. 3 shows the heat radiometer according to FIG. 1 in the case where the axis of rotation of the output shaft of the drive lies in the direction of the heat ray. FIG.

4 shows a view in the direction of arrow B according to FIG. 3;

FIG. 5 shows the heat radiometer of FIG. 1 with a tube in which a heat transfer trajectory is enclosed and around which the drive rotates; FIG.

Fig. 6 is a view in the direction of arrow C of FIG. 1;

Fig. 7: device of Figure 1 with an additional disc. ,

.Fig. 8: a view in the direction of arrow D according to FIG. 7;

Fig. 9i is an overall circuit diagram * of the thermal radiation meter in which the sensing element is in the form of a strip for the case when the strip is attached to a bracket;

FIG. 10: a view in the direction of the arrow E according to FIG. 9; FIG.

Fig. 11: Device according to Fig. 9 in the event that the strip with one end to the output shaft of

8 - 21 O 1

May 7, 1979 54 537/17

Drive is attached; Pig * 12: a view in the direction of arrow P of FIG. 10;

13 is an overall circuit diagram of the heat radiation measuring system j constructed on the basis of a heat radiation meter of FIG

FIG. 14 is a view in the direction of arrow G in FIG. 13; FIG.

The heat radiation meter contains a drive 1 (FIG. 1) with an output shaft 2 whose axis of rotation 3 lies transversely to a heat beam 4. According to this embodiment sits on the shaft 2 perpendicular to the axis of rotation 3 of this shaft 2, a main disc 5 · The disc 5 is made of dielectric. In the heat beam 4th is arranged with the possibility of a displacement with a stabilized speed, a sensing element which is designed in the present variant in the form of an electrically conductive thread 6 (Fig .1, 2), which in the plane of rotation of the main disc 5 (Fig. 2) wavy bent and attached to the periphery thereof * The measuring device also includes a recording device 7 for a change in temperature under the action of heat radiation, at the inputs via collector rings 8, the ends 9 of the thread are connected *

In Figo 3 and 4, one of the reproduced in Fig. 1, 2 circuit of the heat radiation meter similar circuit is shown only in that the axis 3 of the output shaft '2 of the drive 1 is arranged in the direction of WÄ'rmesträhls 4. , ,

210 1

7.5.1979 54 537/17

In the other embodiment, the heat radiation meter includes a tube 11 (FIG. 5) fastened to a support foot 10, in which the heat radiation 4 is enclosed. The support foot 10 is arranged on a platform 12. On the tube 11 is a with a arranged on the platform 12 motor 14 via a belt drive 15 coupled element 13 in the form of a ring, hereinafter a ring 13 »rotatably arranged. The belt drive 15 has a traction sheave 16, a drive belt 17 and a driven pulley 18. The ring 13 and the drive 1 are rigidly connected to one another by a bracket 19 (FIGS. 5, 6) in such a way that the axis 3 of the output shaft 2 of this drive 1 lies transversely to the beam 4. The drive 1 is connected to the outputs 20 of a feed source (not shown in the drawing) via contact rings 21 (FIG. 5) arranged on the ring 13. The collector rings 8 (Fig. 5 » S) are connected to the inputs of the device 7 via a further pair of collector rings 22 arranged on the ring 13.

In a further embodiment, the heat radiation meter includes an additional disk 23 (FIGS. 7, 8) mounted on the drum 2 parallel to the main disk 5. The disk 23 is made of dielectric. The distance between the disks 5 and 23 (FIG. 7) must exceed the cross section of the heat beam 4. The sensing element according to the present variant is also embodied in the form of a zig-zag between the disks 5 and 23 (FIG. 7), tensioned and arranged on the circumference of the electrically conductive thread 6. Otherwise, this circuit is analogous to the circuit shown in FIG. ,

- 210 1

7.5 * 1979 54 537/17

In yet another embodiment of the thermal radiation meter, the sensing element is in the form of a bimetallic strip 24 (Figures 9, 10). The width of the strip 24 (Figure 10) must be below the cross section of the heat beam 4 and its length across -. Crossing of the beam 4. The knife has a bracket 25 (FIG. 9) arranged on the shaft 2. At the ends of the bracket 25, the ends of the strip are fixed so that the strip 24 shields the bracket 25 against the heat beam 4. As a device 7 (Fig. 3, 5, 6, 7), a well-known encoder 26 (Fig. 9) is used for longitudinal movement, the input 27 of which is contacted with the center of the strip 24 as its fulcrum.

In yet another embodiment of the heat radiation meter, the sensing element is in the form of two strips 2.8, 29 (FIGS. II, 12) fastened at one end to the shaft 2 such that the plane of each strip 28, 29 is perpendicular to the heat beam 4.

The longitudinal motion encoder 26 includes mirrors 30 attached to the free ends of the strips 28 and 29, respectively. Upon rotation of the skins 2, a light tint 32 from a radiator 33 is incident on the mirrors 30 (eg, the mirror 30) a light beam alternately. In the beam path of a reflected light beam 34 is a reading scale 35 »

The present invention is a combination of three apparatuses according to the invention, shown in FIG. 3, of FIG. 13 (FIG. 13), composed of a / y radiation measuring system.

210 1

7.5.1979 54 537/17

The measuring devices 36 (Pig · 14) are offset from one another by an angle of 120 ° in the manner that their current-conducting threads β cover the cross-section of the heat beam 4.

The heat radiometer works as follows.

The brought into the heat radiation sensing element takes part of their energy. As a result, the temperature of the sensing element increases · The sensing element rotates at a stabilized speed and stabilizes its temperature to a predetermined level.

If the sensing element is designed in the form of a current-conducting thread 6 (FIG. 1), its ends 9 are connected to a device 7 which is calibrated in power units of heat radiation and measures a change in the electrical resistance of this thread 6.

If the current-conducting thread 6 (Fig. 1, 2) is fastened to the circumference of the main disk 5 and the axis of rotation 3 of the shaft of the drive 1 is arranged transversely to the heat beam 4, the heat radiation meter measures the power of the heat beam 4 with a uniform power density distribution over the cross section this · heat ray 4 ·

If the axis 3 (FIG. 3, _S 4) is directed along the heat ray 4, the heat radiation meter measures the integrated power of this heat ray 4 ·

The advantage of these two variants is the fact that with minimal heat radiation.4 (FIGS. 1, 2, 3, 4) the

12 - 2 1

7.5.1979 54 537/17

Continuity of the waves of the current-conducting thread 6 increases with increasing speed of the shaft 2 «The plane of the convolution of the waves of the thread 6 coincides with the plane of. Effect of external forces occurring in their nature as centrifugal forces.

Such an optimal configuration makes it possible to use a thread β of minimum cross-sectional area and thus to minimize the inertia of the device. "

In the case where the drive 1 by means of the bracket 19 (Fig. 5 »S) is rigidly connected to the tube 13 arranged on the ring 13, the current-conducting thread 6, the possibility of an additional rotational movement to the enclosed in the tube 11 Heat ray 4 auszufuhren. In this case, the heat radiation meter measures the spatial power density distribution over an arbitrary cross section of the heat beam 4.

If the electrically conductive yarn is stretched in a zigzag between the discs 5 and 23 6 ₍₁ 8 Fig. I), the device measures the integrated performance of the heat beam 4 '

If the sensing element is designed in the form of a strip 24 (FIG. 9, 10) or in the form of two strips 28, 29 (FIGS. 11, 12), the device 7 used is a sensor 26 calibrated in units of heat radiation for longitudinal movement "

13 - 210 1

7.5.1979 54 537/17

under the effect of radiation, the strip 24 (Fig. 9-10) or the strips 28,29 (Figs. 11-12) are deformed, and according to the magnitude of this deformation, the power of the heat ray 4 is judged after a corresponding calibration.

The center of the strip 24 (Figures 9, 10), the ends of which are secured to the bracket 25, is contacted directly with the input 27 of the encoder 26 measuring the magnitude of this deformation.

The strips 28, 29 (FIGS. 11, 12) are deformed when the beam 4 is cut, causing a change in position of the mirrors 30 and 31 with respect to a narrow light beam 32. This causes a change in position of the reflected light beam 34 * The size of this change is registered by means of the reading scale 35 of the encoder 26.

In place of the mirrors 30, 31, a polished surface (not shown) formed at the free ends of the strips 28, 29 may be utilized.

For determining the position of the power peak of the heat beam 4, the heat radiation measuring system composed of three heat radiation meters 36 (FIGS. 13, 14) is utilized. The mutual displacement of the devices 36 by an angle of 120 makes it possible at the same time to measure the integrated power and to determine the position of the peak power of the heat radiation in the cross section of the heat beam 4.

The present invention is characterized by high tech-

210 1

7.5.1979 54 537/17

nisch-wirtschaftliehe indicators. As a result, measurements are made that lie within the wide power range of the heat rays.

Another advantage of the present invention is also the ease of replacement of the elements upon failure. In addition, the small dimensions of the solution according to the invention make it possible to arrange them practically at any point of the path of movement of the heat beam. ,

Claims (8)

Claim for invention 1. Warm trahlujigsmess he, which contains a brought into a heat radiation sensing element to which a recorder for a temperature change of Fühlememehtes under the effect of heat radiation is characterized in that therein the sensing element with the possibility of a shift with a stabilized speed in the heat beam C4 ) is arranged. , 2. Heat radiation meter according to item 1, characterized in that it comprises a drive (1) with an output shaft (2) whose axis of rotation (3) transversely or along the tfärmestrahls (4) and on which the sensing element is arranged. 3 * heat radiation meter according to point 2, characterized in that it contains a sensing element carrying the main disc (5) on the output shaft (2) of the drive (I) 'perpendikular su whose axis of rotation (3) sitting. .- ' Heat radiation meter according to point 3 »in which the sensing element in the form of an electrically conductive thread (6) is executed, characterized in that the current-conducting thread (6) in the plane of rotation of the main disc (5) bent wave-shaped and is arranged on the circumference» 7.5.1979 54 537/17 Heat radiation meter according to points 2 to 4, characterized in that in the case of the arrangement of the axis of rotation (3) of the output shaft (2) of the drive (1) transversely to the heat beam (4) a tube (II), in which the heat ray (4 ) and includes a member (13) arranged with the possibility of rotation on said tube (II) and a bracket (19) rigidly connected to said member (13) and the drive (I). Heat radiation meter according to items 2 and 3, characterized in that, in the case of the arrangement of the axis of rotation (3) of the output shaft (2) of the drive (I) transversely to the heat beam (4), it has an additional disc (23) mounted on the External shaft (2) of the drive (I) parallel to the main disc (5) sits and on which the sensing element is fixed, wherein the distance between the main disc (5) and the additional disc (23) exceeds the cross section of the heat beam (4). 7 · -Y / radiometer according to item 6, in which the sensing element is in the form of a current-conducting thread (6), characterized in that the current-conducting thread (6) zigzags between the main disc (5) and the additional disc (23) is curious. 8. heat radiation meter according to item 3 to 7, characterized in that the main disc (5) and the additional disc (23) are made of a dielectric * 9 "heat radiation meter according to point 2, characterized in that in the case of Anoi'dnung the axis of rotation (3) ι? ν 210 126 7.5.1979 54 537/17 the output shaft (2) of the drive (I) along the heat ray (4) the sensing element is in the form of at least one strip (24, 28, 29) made of a material in which the longitudinal dimensions change with temperature, wherein the width of the strip (24, 28, 29) is smaller than the cross section of the heat beam (4), the length of the strip (24, 28, 29) is greater than the cross section of the heat beam (4) and the plane de-3 strip (24, 28, 29) itself perpendicular to the axis of rotation (3) of the output shaft (2), while as a recorder (7) for a Temperatüränderung a sensor (26) for a longitudinal movement for measuring a deformation of the strip (24, 28, 29 ) in the axial direction of the output line (.2) of the drive (I) is used. 10. heat radiation meter according to item 9, characterized in that the strip (24, 28, 29) is made of bimetal « 11. heat radiation meter according to item 9 and 10, characterized in that im.Falle the embodiment of the sensing element in the form of a strip (24) the arrangement of the strip (24) on the output shaft (2) of the drive (I) by means of a bracket (25 ) which is rigidly mounted on the output member (2) in such a manner that the ends of the tab (24) on the bracket (25) are fixed and the center of the strip (24) as its fulcrum with the input (27) of the encoder (26) is contacted for longitudinal movement, wherein the strip (24) the bracket (25) from the heat beam (4) -abschirmt. -. 18; - £ 1 0 ί 7.5.1979 54 537/17 Thermal radiation meter according to items 9 and 10, characterized in that in the case of the design of the sensor element in the form of a strip (28, 29) or numerous strips (28, 29) the strip (28, 29) or the plurality of strips (28 , 29) are rigidly fixed at one end to the output shaft (2) of the drive (I) and the transmitter (26) for longitudinal movement at the free end of the strip (28, 29) arranged mirror (30, 31) »on the a light beam (32) is directed by a radiator (33) for a light beam, and a read-out scale lying in the beam path of a reflected light beam (34) (35). Heat radiation meter according to item 11, characterized in that a polished surface executed at the free end of the strip (28, 29) is utilized as the mirror (30, 31) 1-4 * heat radiation measuring system, characterized in that it consists of at least three heat radiation meters (36) in accordance with points I to 4 Rierzu ^ SLSeiten'Zeidinungen