KR101072434B1 - Optical Signal Switching Apparatus and Method for Measuring temperature of Reheating Material using The Same - Google Patents

Abstract

An optical signal switching device and a method for measuring a temperature of a heating material using the same are provided.

The optical signal switching device of the present invention is disposed on one inner side of the casing of the inner matte, a plurality of light transmitting parts connected to the light receiving unit disposed at a plurality of measuring points of the measurement object, and the light transmitting unit to the rotating body provided in the casing An optical signal switching unit including a beam separation wall provided to selectively pass only one optical signal of a plurality of optical signals, and a reflector disposed at a central side of the rotating body to reflect an optical signal that has been selectively passed; A light concentrator disposed to face the reflector, wherein the rotor comprises a disc disposed outside the casing and mounted on a drive shaft of the drive motor passing through the casing, and the beam separating wall is the rotation disc. It is mounted vertically along the entire circumference, characterized in that it comprises a light passing hole formed in the corresponding area of the plurality of light transmission unit The.

According to the present invention, there is provided an optical signal switching device for switching a plurality of optical signals (infrared rays) for measuring the temperature of the object to measure a plurality of measurement signals through one pyrometer sensor In particular, it can be used to measure the temperature of the slab passing through the preheating zone, heating zone and cracking zone in the furnace at a low cost and with a simplified measuring system, thereby reducing the cost of construction and maintenance of the slab temperature measurement system of the furnace. A more improved effect can be obtained.

Optical fiber, pyrometer, pyrometer, furnace, slab

Description

Optical Signal Switching Apparatus and Method for Measuring temperature of Reheating Material using The Same}             

1 is an overall configuration diagram showing a system for measuring the temperature of the slab which is the heating material of the preheating zone, the heating zone and the cracking zone in the conventional heating furnace.

FIG. 2 is a schematic representation of a pointer pyrometer sensor measuring the temperature of the slab in FIG.

3 is a perspective view showing an optical signal switching device according to the present invention

Figure 4 is a structural diagram showing the operation of the optical signal switching device of the present invention

5 is an overall configuration diagram showing a temperature measuring method of a slab as a heating material in a heating furnace using the optical signal switching device of FIG.

6 is a perspective view illustrating a light condenser and a pyrometer sensor connected thereto in the optical signal switching device of FIG.

7 is a perspective view illustrating a light receiving unit for receiving an optical signal (infrared ray) of a slab which is a heating material in FIGS. 3 and 5;

Explanation of symbols on the main parts of the drawings                 

1 .... optical signal switch 10 .... casing

20 .... light transmitting part 30 .... rotator

32 .... drive motor 34 .... drive shaft

40 .... Ray Pass 42

50 .... Reflector 60 .... Optical Switch

70 .... Light Condenser 74 ..... Sensor

C .... Controls

The present invention relates to an optical signal switching device and a method for measuring a temperature of a heating material using the same, and more particularly, by switching a plurality of optical signals (infrared rays) for measuring the temperature of an object to convert a plurality of measurement signals into one pyrometer ( It provides an optical signal switching device that makes it possible to measure through a pyrometer sensor. In particular, it can be used to measure the temperature of the slab passing through the preheating zone, heating zone, and cracking zone in the furnace at a low cost and with a simplified measurement system. The present invention relates to an optical signal switching device for facilitating the construction and maintenance of a slab temperature measuring system of a heating furnace, as well as a cost, and a method for measuring the temperature of a heating material using the same.

In the case of measuring the surface temperature of an object having a high temperature, since the temperature of the object is high, the temperature of the object is measured in a non-contact manner without direct contact. An apparatus for measuring the temperature of such a pyrometer is called a pyrometer. .

 In other words, the measurement of temperature is generally called a thermometer, while a pyrometer measuring high temperature objects is a resistance thermometer, a thermistor thermometer, and a thermoelectric device that applies a change in thermoelectric power. Thermometers, bimetal thermometers using two different metals bonded together, and aneroid thermometers using a change in pressure or a vapor tension are used.

However, the temperature that can be measured as thermometers of these pyrometers is up to approximately 150 ° C., and the object having a temperature higher than that becomes higher in heat radiation, and changes its color or intensity by changing from red to incandescent colors. Special thermometers are used to measure temperature and temperature. These types of thermometers include photometers, radiation thermometers, photoelectric thermometers, and color thermometers.

That is, these pyrometers measure the temperature of the object without directly contacting the object to be measured, and can be conveniently used to measure the temperature of an object or a moving object, which is usually far away, and by using a double optical fiber, A device that collects the generated light (infrared) signal and measures it as a connected sensor is called a pyrometer sensor.

On the other hand, the sludge produced in the steel mill is produced as a slab through a refining process and a reproducing process, such a slab is subjected to a heating furnace before being put into the rolling process, in Figure 1 the internal heating material of the conventional heating furnace The system for measuring the temperature of the phosphor slab is shown.

That is, as shown in Figure 1, the interior of the heating furnace 100 is largely composed of preheating zone, heating zone, cracks, continuous to move the interior of the heating furnace using a working beam (110) Heating of the slabs is carried out.

However, the temperature of each slab 120a, 120b, 120c passing through each preheating zone, heating zone, and cracking zone of the heating furnace 100 should be measured for each section, which means that the slab is heated according to the operation temperature. This can be done by determining whether the slab will continue on the next heating table or crack.

On the other hand, as shown in Figures 1 and 2, the temperature measurement method of the slab (120a) (120b) (120c) of the conventional heating furnace is infrared rays generated in the slab at the point of passing through the slab of each preheating zone, heating table and cracks. And pointer-type pyrometers 130a, 130b, 130c arranged to sense the temperature of the slab in a non-contact manner.

In other words, the pointer-type pyrometer is a form of measuring the temperature of the object through an integrated sensor by collecting light (infrared) signal generated at the measurement point of the object.

Therefore, in the slab temperature measuring method, which is a heating material of a conventional heating furnace, each pointer type pyrometer should be installed at each slab temperature measuring point. The construction of a system for measuring the heating material temperature of the furnace is expensive, and the system for processing the detection signal generated by each pyrometer is complicated, so that the overall measuring system for measuring the slab temperature of the furnace is In addition to the increased structure, there are several problems, such as maintenance of the temperature measuring system, for example, because the pyrometers are easily damaged by the heat of the furnace and require frequent replacement.

Accordingly, a switching device for receiving optical (infrared) signals generated from a temperature measurement object and placing low-cost optical signal receivers at a plurality of temperature measuring points, and selectively transmitting optical signals from them to the pyrometer. In this case, since only one sensor device such as an expensive pyrometer is used and several low-cost light-receiving units are used, the burden on the overall measuring equipment, space, or cost will be reduced.

In particular, it would be more desirable to use it in a furnace, for example, where a large number of measurement points are required.

Moreover, no optical signal switching device has been proposed which is very simple and precisely switches the optical signal.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to switch a plurality of optical signals (infrared rays) for measuring the temperature of an object to convert a plurality of measurement signals into a single pyrometer sensor. It provides an optical signal switching device that makes it possible to measure by means of heating, in particular using it to measure the temperature of the slab passing through the preheating zone, heating zone and crack zone in the furnace at a low cost and with a simplified measurement system. In addition to the construction and maintenance of the slab temperature measurement system of the furnace, and to provide an optical signal switching device and a method of measuring the temperature of the heating material using the same to reduce the cost.

The present invention as a technical aspect for achieving the above object, the casing having an inner space of the matt state;

A plurality of light transmission parts disposed at one inner side of the casing and connected to light receiving parts disposed at a plurality of measurement points of a measurement object;

A beam separation wall provided to selectively pass only one optical signal of the plurality of optical signals of the light transmitting part to the circumferential side of the rotating body rotatably provided in the inner space of the casing, and disposed at the center side of the rotating body and selectively passing through An optical signal switching unit including a reflector reflecting the received optical signal; And,

An optical condenser for condensing an optical signal while being disposed in the casing to face the reflector;

It is configured to selectively switch the optical signal of a plurality of measuring points, including
The rotating body is composed of a disc disposed on the outside of the casing and mounted on the drive shaft of the drive motor passing through the casing, the beam separation wall is vertically mounted along the circumference of the rotating body which is the rotating disc, the plurality of light transmission portion Provided is an optical signal switching device including an optical passage hole formed in a corresponding region.

In this case, the light transmitting unit is disposed at a predetermined angle along the fixing member fixed to the casing and spaced apart from the beam star wall on the rotating body, the angle is preferably configured to correspond to the rotating angle of the rotating body.

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In this case, the light condenser passes through a casing and is connected to a pyrometer sensor electrically connected to a control unit, and the pyrometer sensor rotates the rotating body so as to control the positions of the beam passing wall and the reflector through the control unit. It is configured to be electrically connected to the drive motor for driving the.

In addition, the light receiving unit may be disposed in the preheating zone, the heating zone, the cracking zone for measuring the temperature of the heating material can be used in the temperature measuring system of the heating material.

Next, as another technical aspect of the present invention, the light receiving unit for receiving an infrared light signal generated in the slab in the preheating zone, the heating zone, the cracking zone of the heating furnace, respectively, and the light receiving portion of the optical signal switching device By connecting the optical transmission unit and the optical cable, connecting the optical condenser of the switching device with the pyrometer sensor as an optical cable, and connecting the sensor with a control unit electrically connected to the drive motor of the optical signal switching device, In addition, the present invention provides a method for measuring a temperature of a heating material using an optical signal switching device configured to selectively measure the temperature of a slab passing through a heating zone and a crack zone through switching of an optical signal.
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

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3 is a perspective view showing an optical signal switching device according to the present invention, Figure 4 is a structural diagram showing the operation of the optical signal switching device of the present invention, Figure 5 is a heating in a heating furnace using the optical signal switching device of FIG. Fig. 6 is a schematic view showing a temperature measuring method of a slab, which is a material, and FIG. 6 is a perspective view illustrating a light condenser and a pyrometer sensor connected thereto in the optical signal switching device of FIG. 3. 5 is a perspective view showing a light receiving unit for receiving an optical signal (infrared ray) of a slab which is a heating material.

3 and 4 show the optical signal switch device 1 of the present invention, the optical signal switching device 1 of the present invention is largely the casing 10, the light transmitting unit 20 and the optical switching unit ( 60), and the light condensing unit 70, and these components 10, 20, 60, 70 in detail as follows.

First, as shown in FIG. 3, the casing 10 of the present invention is configured to have a matte internal space in which light is completely blocked, for example, to absorb light (infrared rays) from the outside. It may be an injection provided in black plastic.

At this time, the inside of the casing (10) should be completely blocked from the light (light) from the outside, which is when the light is introduced into the normal light signal includes a noise light to perform a precise optical signal switching operation It is important because you can't.

Next, FIG. 3 and FIG. 4 show the light transmitting unit 20 of the optical signal switching device 1 of the present invention, and the light transmitting unit 20 of the present invention is the inside of the casing 10. The light receiving unit 80 (see FIG. 7) arranged on one side and arranged at a plurality of measurement points of the measurement object is connected as an optical cable 22.

In this case, the light transmitting unit 20 is spaced apart from the beam separation wall 40 on the rotating body 30 and fixed to the casing 10 at a predetermined angle (a) along the fixing member (see 24 of FIG. 3). In FIG. 3, three light transmitting units 20 are illustrated, but may be arranged in correspondence to the number of measurement points of an object. In this case, the angle a between the light transmitting units 20 is a rotating body described below. It should correspond to the rotation angle of 30, for example, if the rotating body rotates at intervals of 30 degrees at a time, the interval of the light transmission unit 20 should also be adjusted to this.

In addition, the fixing member 24 is formed to have a circular curvature and be disposed at a horizontal position corresponding to the rotating body.

Next, FIG. 3 and FIG. 4 show the switching unit 60 of the optical signal switching device 1 according to the present invention. The switching unit 60 of the present invention is located in the inner space of the casing 10. A beam separation wall 40 provided to selectively pass only one optical signal S of the plurality of optical signals S1-3 of the light transmission unit 20 on the circumferential side of the rotatable body 30 rotatably provided; and It is comprised by the reflector 50 arrange | positioned at the center side of the said rotating body 30, and reflecting the optical signal S selected and passed.

At this time, the reflector 50 uses a conventional mirror.

In addition, as shown in Figures 3 and 4, the rotating body 30 is composed of a disc disposed on the drive shaft 34 of the drive motor 32 is disposed outside the casing 10 and passes through the casing. As described above, the rotation angle of the drive shaft by the operation of the drive motor should be substantially coincident with the rotation angle of the disc, which is the rotor 30.

In this case, the beam separation wall 40 is vertically mounted along the circumference of the rotating body which is the rotating disc, the height of which is to be at least so high that the optical signal emitted from the light transmission unit 20 is blocked, the plurality of light transmission unit The light passing hole is formed in the corresponding area in which the 20 is installed, that is, the light beam wall 40 formed by the rotating body 30 so that only the optical signal S transmitted from one light transmitting unit 20 passes. 42 is integrally formed through.

At this time, it is important that the position of the light passing hole 42 is always the same as the position of the plurality of light transmission unit 20 and the center of the light of one of the light signal (S1-S3) emitted from the plurality of light transmission unit Only the signal S should be passed through and reflected as a mirror on the rotating body described above.

Next, FIGS. 3 and 4 show the light condensing part 70 of the optical signal switching device 1 of the present invention, and the light condensing part 70 of the present invention is located inside the casing 10. It is configured to condense the selected optical signal S while being disposed opposite to the reflector 50.

That is, the light condenser 70 passes through a casing and is connected to the pyrometer sensor 74 as an optical cable 72, and at the same time, the sensor 74 separates an optical signal beam through the rotation of the rotating body. ) And the control unit C electrically connected to the driving motor 32 for controlling the position of the reflector 50.

Therefore, referring to the operation of the optical signal switching device 1 of the present invention through FIG. 4, the optical signal received by the light receiving unit 80 disposed at a plurality of measurement points, for example, the optical signal of infrared rays according to the temperature of the slab. The arc is emitted along the optical cable 22 to the plurality of light transmission units 20 in the casing 10 of the switching device 1.

At this time, the control unit C operates the driving motor 32 to match the optical signal of the light transmission unit 20 corresponding to the desired measurement point among the plurality of measurement points with the passage hole 42 of the beam-by-beam wall 40. The position of the through hole is controlled integrally with the rotating body 30.

Therefore, the optical signal emitted from the desired light transmission unit 20 is condensed by the light concentrating unit 70 via a reflector 50 which is a mirror in the matt casing, and the condensed optical signal is connected to the optical cable 72. It is transmitted to the pyrometer sensor 74, the measured value of the measurement object measured by this sensor is transmitted to the control unit (C), the control unit to advance the slab of a specific process, for example, a heating furnace based on this. Determine the price.

As a result, the switching device 1 of the present invention selectively switches the optical signals while using a plurality of photoreceptors 80, and measures them as an expensive pyrometer sensor. ) Uses low cost, and one expensive sensor can be used.

This simplifies the structure of the measurement system, thereby reducing costs while facilitating construction and maintenance.

That is, the light receiving unit 80 may be disposed in a preheating zone, a heating zone, and a cracking zone for measuring slab temperature, which is a heating material of the heating furnace, and may be used in a temperature measuring system of the heating furnace.

Next, FIG. 5 shows a method for measuring a temperature of slab, which is a heating material of a heating furnace, using the optical signal switching device 1 according to the present invention.                     

That is, as shown in Figure 5, first, the light receiving unit 80 for receiving an optical signal (infrared rays) generated in the slab 120a, 120b, 120c in the preheating zone, heating zone, cracking zone of the heating furnace 100. Each of the photo-receiving unit 80, as shown in FIG. 7, has a heat resistant block 82 attached to the furnace wall of the heating furnace 100 to prevent burnout by heat, and the heat resistant block 82 In the upper part of the), a light receiving unit 80, for example, a light receiving unit of the lens assembly, is installed to receive infrared rays of different wavelength bands according to the temperature of the slab through the block.

Next, the light receiving unit 80 is connected to the light transmitting unit 20 of the optical signal switching device 1 of the present invention through the optical cable 22, the light collecting unit 70 of the optical signal switching device 1 ) Is connected to the optical cable extension pyrometer sensor 74 as the optical cable 72.

In this case, the sensor 74 is connected to the control unit C electrically connected to the driving motor 32 of the optical signal switching device 1.

6 shows an optical cable extension type pyrometer condenser 70 and a sensor 74 thereof used in the slab temperature measurement of the heating furnace of the present invention.

Therefore, when the temperature of the slabs 120a, 120b, 120c passing through the preheating zone, the heating zone, and the cracking zone of the heating furnace 100 is received by the light receiving unit 80 as infrared light signals, respectively, the switching device through the cable. Emitted by the light transmission unit 20 of (1), the control unit (C) in the case of measuring the desired measurement point, for example, slab temperature of the preheating stage, by rotating the drive motor 32 to transmit the light transmission associated with the preheating measurement point The light passing hole 42 of the part 20 and the beam separation wall 40 is matched.                     

As a result, the slab temperature of the preheating zone is measured by the sensor 74 which is collected by the light condenser 70 through the reflector 50 and connected by an optical cable as an optical signal, and the measured value (temperature of the slab) is transmitted to the controller C. Thus, the entire furnace is driven, for example, when the temperature of the slab reaches the set temperature, the slab is moved.

Accordingly, when the optical signal switching device 1 of the present invention is used, since the optical signal received at each measuring point of the heating furnace is processed by only one condenser and a pyrometer sensor through the switching device, the heating material of the heating furnace is The temperature measuring system can be greatly simplified, and only one pyrometer, an expensive sensor, can be used to reduce the cost of building and maintaining the temperature measuring system.

As described above, according to the optical signal switching device of the present invention, by selectively connecting one of a plurality of measurement optical signals to one sensor mechanism, an expensive sensor mechanism can be used but only one measurement point can be diversified. It provides the effect of facilitating maintenance and especially reducing the cost.

In addition, according to the method for measuring the temperature of a heating material using such an optical signal switching device, a light-receiving unit that easily generates a small phase due to heat is used at low cost, and these optical signals are treated as one condensing and sensor mechanism. In other words, it provides another excellent effect of reducing costs while facilitating the construction or maintenance of a system for measuring the temperature of the slab as a heating material.                     

While the invention has been shown and described in connection with specific embodiments so far, it will be appreciated that the invention can be varied and modified without departing from the spirit or scope of the invention as set forth in the claims below. It will be appreciated that those skilled in the art can easily know.

Claims (6)

A casing having a matt interior space; A plurality of light transmission parts disposed at one inner side of the casing and connected to light receiving parts disposed at a plurality of measurement points of a measurement object; A beam separation wall provided to selectively pass only one optical signal of the plurality of optical signals of the light transmitting part to the circumferential side of the rotating body rotatably provided in the inner space of the casing, and disposed at the center side of the rotating body and selectively passing through An optical signal switching unit including a reflector reflecting the received optical signal; And, An optical condenser for condensing an optical signal while being disposed in the casing to face the reflector; It is configured to selectively switch the optical signal of a plurality of measuring points, including The rotating body is composed of a disc disposed on the outside of the casing and mounted on the drive shaft of the drive motor passing through the casing, the beam separation wall is vertically mounted along the circumference of the rotating body which is the rotating disc, the plurality of light transmission portion An optical signal switching device comprising an optical passage hole formed in a corresponding region. The method of claim 1, wherein the light transmitting unit is disposed at a predetermined angle along the fixing member fixed to the casing and spaced apart from the beam separation wall on the rotating body, the angle is configured to correspond to the rotating angle of the rotating body Optical signal switching device. delete The light collecting part of claim 1, wherein the light collecting part is connected to a pyrometer sensor electrically connected to a control part through a casing, and the pyrometer sensor controls the position of the beam-by-wall passing hole and the reflector through the control part. Optical signal switching device characterized in that it is electrically connected to a drive motor for driving the rotation of the rotating body. The optical signal switching device of claim 1, wherein the light receiving unit is disposed in a preheating zone, a heating zone, and a cracking zone for measuring the heating material temperature of the heating furnace, and used in a heating material temperature measuring system of the heating furnace. In the preheating zone, the heating zone, and the cracking zone of the heating furnace, a light receiving unit for receiving an infrared light signal generated from a heating material is provided, respectively. Connecting the optical light receiving unit with an optical cable of the optical signal switching device according to claim 1 with an optical cable, connecting the optical light collecting unit of the switching device with a pyrometer sensor as an optical cable, By connecting the sensor with a control unit electrically connected to the drive motor of the optical signal switching device, an optical signal switching device configured to selectively measure the temperature of the slab passing through the preheating zone, the heating zone, and the cracking zone by switching the optical signal. Method of measuring temperature of heating material.

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