KR20100078818A - Apparatus for measuring the thickness of strand, system for measuring the thickness of strand and method for measuring the thickness of strand therewith - Google Patents

Abstract

The present invention relates to a slab thickness measuring apparatus, a slab thickness measuring system and a slab thickness measuring method using the same. More particularly, the upper and lower surfaces of the slab being continuously cast in direct contact with the transducer to be driven by real-time online control of the slab The present invention relates to a slab thickness measuring apparatus capable of continuously and accurately measuring thickness, a slab thickness measuring system, and a slab thickness measuring method using the same.

Apparatus for measuring the thickness of the cast steel according to the present invention includes a support body portion extending in the vertical direction, the master gauge portion to drive in a horizontal direction from one side of the support body portion, the sensor support portion and the sensor coupled horizontally to both ends of the support body portion And a sensor unit coupled in a direction intersecting one end of the support and driving a pair of transducers in a vertical direction to measure a displacement value for calculating the thickness of the slab by contact with the slab.

Casting, segment, transducer, thickness measurement, LVDT

Description

Apparatus for measuring the thickness of strand, system for measuring the thickness of strand and method for measuring the thickness of strand therewith}

The present invention relates to a slab thickness measuring apparatus, a slab thickness measuring system and a slab thickness measuring method using the same. More particularly, the upper and lower surfaces of the slab being continuously cast in direct contact with the transducer to be driven by real-time online control of the slab The present invention relates to a slab thickness measuring apparatus capable of continuously and accurately measuring thickness, a slab thickness measuring system, and a slab thickness measuring method using the same.

In general, precisely measuring the thickness of the cast steel during the casting process is essential for accurately calculating the pressure drop for cutting the cast steel to a certain size or for detecting the bulging amount of the cast steel or reducing the center segregation.

By the way, since the temperature of the cast steel cast and the surrounding atmosphere of cast steel is 1000 degreeC or more high temperature state, there existed various difficulties in directly measuring the thickness of a cast steel in real time. That is, the measuring device for measuring the thickness of the cast steel is exposed to a high temperature atmosphere for a long time, the measuring device malfunctions, there is a problem that the reliability of the measurement data is degraded due to the thermal deformation of the measuring device.

In addition, the casting equipment is composed of a plurality of segments (segment) for forming a set of a plurality of rolls passing the cast inwards are arranged along the casting direction, the interval between the rolls and the rolls within the segment consists of several tens of millimeters There was a space limitation in installing a measuring device that can directly measure the thickness of the cast steel.

Looking at the conventional slab thickness measuring apparatus and method, it is divided into a contactless and a contact type according to the contact with the cast.

Conventional non-contact methods include radiation transmission method, eddy current detection method or cast method (application number Korea 10-2002-0082918, application number Korea 10-2000-0083164, application number Korea 10-2000-0065719, Application No. 10-2000-0052441, Application No. Korea 10-1999-0064526) The radiation transmission method or the eddy current detection method transmits radiation to a slab or applies an eddy current to the slab and detects the density of radiation or eddy current that has passed through the slab. It is a method of calculating the thickness of the cast steel, the cast shooting method is a method of taking the cast as an image image and converts it to the thickness of the cast steel.

By the way, the conventional slab thickness measuring apparatus using a non-contact system is expensive and difficult to install in a narrow casting space because it was made large. In addition, it requires a lot of accessories and due to the characteristics of the casting process, it is difficult to accurately measure the thickness of the cast due to the signal distortion and interference caused by the poor operating conditions that generate high heat, steam and dust.

On the other hand, the conventional contact method (application number Japanese Patent No. 5-226690) is provided with a light emitting device at the end of the contact rod in contact with the upper and lower surfaces of the cast steel, and calculate the thickness of the cast steel through the displacement value of the light emitting mechanism As a way, the conventional slab thickness measuring apparatus using such a contact method has had to configure a separate measuring device to measure the displacement of the light emitting device.

In order to solve the above problems, the present invention is installed in a casting space having a poor thermal environment, it can be measured continuously and accurately using a contact probe driven by real-time online control of the thickness of the hot cast being cast The present invention provides a cast steel thickness measuring apparatus, a cast steel thickness measuring system, and a cast steel thickness measuring method using the same.

Cast steel thickness measuring apparatus according to the present invention for achieving the above object is a support body portion extending in the vertical direction, a master gauge portion for driving in a horizontal direction from one side of the support body portion, horizontal to both ends of the support body portion And a sensor unit coupled in a direction intersecting with one end of the sensor support unit to be coupled to each other and driving a pair of transducers in a vertical direction to measure a displacement value for calculating the thickness of the cast unit by contact with the cast steel. .

In addition, the cast steel thickness measuring system according to the present invention for achieving the above object is a measurement unit for providing an initial position value and a displacement value for calculating the thickness of the cast steel in direct contact with the cast steel, the operation of the measuring unit A client command for inputting a driving command to display a cast steel measurement data and casting information including the thickness of the cast steel in real time on-line; and driving control of the measuring unit through the driving command, wherein the initial position value and displacement And a server unit converting a value into the cast measurement data and providing the cast measurement data and casting information to the client unit.

In addition, the method for measuring the thickness of the cast steel according to the present invention for achieving the above object is to recognize the vertical length of the master gauge does not cause thermal deformation, by directly contacting a pair of transducers on the upper and lower surfaces of the master gauge Measuring an initial position value, measuring a displacement value by directly contacting the pair of transducers with upper and lower surfaces of the cast steel, and using the vertical length of the master gauge, the initial position value and the displacement value, Calculating the thickness of the bias.

According to the present invention, it is possible to install on a narrow casting space in a segment exposed to a poor thermal environment, so that the thickness of the cast can be easily measured in a direct contact method.

In addition, the cast steel thickness measuring apparatus is manufactured using a heat-resistant alloy and provided with a cooling means therein to ensure excellent operation reliability and measurement data even in a high temperature atmosphere around the cast steel and the cast steel.

In addition, by including the cast steel thickness measuring device on the network connected online and real-time online control, there is a convenience that can check the measurement data and casting information of the cast steel in real time in a remote place.

Therefore, the slab thickness measuring apparatus, the slab thickness measuring system and the slab thickness measuring method using the same according to the present invention by making it easy to determine the abnormality of the slab through the thickness measurement of the slab in the casting process, thereby making it possible to manufacture a quality cast There is an effect of improving the productivity of the casting process.

Hereinafter, with reference to the accompanying drawings will be described an embodiment according to the present invention in more detail. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the embodiments are intended to complete the disclosure of the present invention, and to those skilled in the art the scope of the invention. It is provided for complete information. Like reference numerals in the drawings refer to like elements.

1 is a view showing the installation state of the cast steel thickness measuring apparatus according to an embodiment of the present invention, Figure 2 is a side view seen from the direction A shown in FIG.

1 to 2, the slab thickness measuring apparatus 100 according to an embodiment of the present invention is the slab (S) passing through a plurality of segments (10) aligned along the casting direction, that is, high temperature heat A device for measuring the thickness (t) of a core piece, the space between a plurality of rollers (11, 12, 13, 14) embedded in the segment (10), that is, horizontally along each other along the advancing direction of the cast (S). It is installed vertically in the spaced space between the adjacent upper rollers (11, 13) and the spaced space between the lower rollers (12, 14). Since the spacing space between the rolls 11 and 13 and the rolls 12 and 14 in the segment 10 is narrow, the hot slab thickness measuring apparatus 100 according to the present embodiment has a width w ₂ of the spacing space of the roll. It is designed to have a width w ₁ of a size smaller than). Of course, as the pitch between the rolls, that is, the width w ₂ of the separation space increases, the width w ₁ of the cast steel thickness measuring apparatus 100 may also increase.

On the other hand, in order to install the slab thickness measuring apparatus 100 in the segment 10, various methods such as a welding method, a bolt fastening method can be used.

3 is an internal configuration diagram of a slab thickness measuring apparatus according to an embodiment of the present invention, Figure 4 is an internal configuration diagram of the sensor unit shown in FIG.

3 to 4, the slab thickness measuring apparatus 100 according to an embodiment of the present invention is a support body portion 110 and a side of the support body portion 110 extending in the vertical direction (y direction) In the direction intersecting the master gauge portion 120 and the sensor support portion 130 and the sensor support portion 130 are horizontally coupled to both ends of the support body portion in the horizontal direction (x direction) in the It comprises a sensor unit 140 for driving the transducer 146 in the vertical direction (y direction) to measure the displacement value for calculating the thickness (t) of the slab by contact with the slab (S).

In the present embodiment, the support body 110 is installed perpendicular to the plurality of rollers 11, 12, 13, 14 (see FIG. 2) provided in the segment 10 (see FIG. 2). Accordingly, the cast steel thickness measuring apparatus 100 is likely to deform because it is exposed for a long time in a poor installation environment in which water vapor and dust are generated and maintained at a high temperature. In order to prevent this, the cooling body is circulated inside the support body part 110, the master gauge part 120, the sensor support part 130, and the sensor part 140 constituting the cast steel thickness measuring apparatus 100 according to the present invention. Cooling water circuits 111, 121, 131, and 141 are provided, respectively.

In addition, the cast steel thickness measuring apparatus 100 is made of a heat-resistant alloy excellent in heat resistance to withstand high temperatures of 1000 ℃ or more. As the heat resistant alloy used in the present embodiment, an Inconel-based or stainless steel heat-resistant alloy is used, and a stainless steel heat-resistant alloy having a lower heat resistance than the Inconel-based heat-resistant alloy is applied to the slab thickness measuring apparatus 100. In this case, more powerful cooling means are required, and thus the configuration of the cooling water circuits 111, 121, 131, and 141, the temperature of the cooling water, and the type of cooling water are different.

The master gauge unit 120 measures an initial position value, which is a reference for calculating the displacement value measured by the sensor unit 140 as the thickness t of the cast steel, and for this purpose, is coupled to the central portion of the support body 110. Is connected to the master gauge cylinder 125 and the piston 126 of the master gauge cylinder 125, the cooling chamber 127 and the cooling chamber that is forward or backward in one horizontal direction (x direction) of the support body 110 And a master gage 128 which is fixed to the inside of 127 and serves as a reference for the initial position value.

The master gauge 128 is made of an Inconel material that maintains a constant length at all times even when exposed to high temperature and maintains a constant length at all times. In addition, when measuring the initial position value, the upper and lower surfaces of the master gauge 128 to which the pair of transducers 146 directly contact are made flat. The cooling chamber 127 for wrapping and fixing the position of the master gauge 128 on the side is provided with a cooling water circuit 121 through which cooling water is circulated, and cooling water is injected and discharged to one side of the master gauge cylinder 125. An injection tube 122 and an outlet tube 123 are provided. In addition, a compressed air supply pipe 124 into which compressed air as a power source is injected is provided to drive the master gauge cylinder 125 adjacent to the injection pipe 122 and the discharge pipe 123. The upper and lower ends of the cooling chamber 127 are open so that when the master gauge 128 is supported inside the cooling chamber 127, the upper and lower end surfaces of the cooling chamber 127 are open to the flat upper surface of the master gauge 128. The lower surface is exposed.

In the master gauge unit 120 configured as described above, the master gauge 128 is stopped at a position close to the master gauge cylinder 125 before the measurement of the thickness t of the cast steel, and then the measurement of the thickness t of the cast steel is started. Initial position value by a pair of transducers 146 which are pushed in the horizontal direction (x direction) and move between the upper sensor 140a and the lower sensor 140b and directly contact the upper and lower surfaces of the master gauge 128. This is measured. When the measurement of the initial position value is completed, the master gauge 128 returns to the position before the measurement start. However, the vertical length of the master gauge 128 that does not cause thermal deformation before the master gauge 120 is driven, that is, before the initial position value is measured, is recognized by the operator.

The sensor support part 130 is horizontally coupled to both ends of the support body part 110 such that the sensor part 140 is positioned above and below the slab S.

The sensor support unit 130 is divided into an upper sensor support unit 130a coupled to the upper end of the support body unit 110 and a lower sensor support unit 130b coupled to the lower end of the support body unit 110. Cooling water circuits 131 through which cooling water is circulated are formed, respectively. In one side of the upper sensor support 130a and the lower sensor support 130b, an injection tube 132 and a discharge tube 133 for supplying and discharging the cooling water to the cooling water circuit 131 are protruded.

As a difference between the upper sensor support 130a and the lower sensor support 130b, the upper sensor 140a may be rotated inside the upper sensor support 130a in a direction intersecting one end of the upper sensor support 130a. The rotating cylinder 135 is provided. In this embodiment, by allowing the upper sensor 140a to be rotated, the tail of the cast steel (S) is abnormally bent when the casting is completed, and the tail hits the upper sensor 140a when passing through the slab thickness measuring apparatus 100. To prevent damage or breakage. The rotary cylinder 135 is driven by the compressed air provided through the compressed air supply pipe 134 provided on one side of the upper sensor support 130a.

In this embodiment, the upper sensor support portion 130a and the lower sensor support portion 130b are horizontally coupled to both ends of the straight support body portion 110, but as a modified example, the support body portion 110 has a “b” shape or the like. Alternatively, a part of the sensor support 130 may be integrally formed with the support body 110 by being deformed into a "c" shape.

The sensor unit 140 is coupled to one end of the upper sensor support unit 130a and coupled to the one end of the lower sensor support unit 130b and the upper sensor 140a which advances or retracts the transducer 146 downward. It is coupled in the cross direction includes a lower sensor (140b) for advancing or retracting the transducer 146 toward the upper direction. The upper sensor 140a and the lower sensor 140b may be positioned to face each other in a straight line along the vertical direction (y direction) to accurately measure the thickness t of the cast steel S.

In this embodiment, the upper sensor 140a and the lower sensor 140b have the same configuration. However, the lower sensor 140b is simply coupled to one end of the lower sensor support 130b, but the upper sensor 140a is rotatably coupled to the upper sensor support 130a, and the upper sensor 140a and the upper sensor for this purpose. The rotating part 138 is provided between the support parts 130b.

An internal configuration of the upper sensor 140a will be described, and a difference from the lower sensor 140b will be described.

The upper sensor 140a is coupled in a direction intersecting with one end of the upper sensor support part 130a, and the sensor body 145 and the lower surface of the sensor body 145, the inner space of which is empty so that the cooling gas (gas) passes through. A driving rod 147 through which the sensor part protective cover 146a and the transducer 146 are attached to one end and provided in an inner space of the sensor body 145 and connected to the other end of the driving rod 147 is driven. A transducer drive cylinder 148 for reciprocating the rod 147 in a vertical direction, a contact displacement sensor 149a attached to one side of the transducer drive cylinder 148 and measuring a displacement value of the transducer drive cylinder 148; A linear variable differential transformer (LVDT) sensor 149b and a sensor provided at one side of the outer circumferential surface of the driving rod 147 located in the inner space of the sensor body 145 to measure the displacement value of the driving rod 147. One side and the outer peripheral surface of the drive bar 147 located in the inner space of the body 145 It is coupled between one side of the inner surface of the thermo body 145 includes an elastic member 149c for pushing the transducer 146 to the upper surface of the cast (S) to more strongly contact the transducer 146 to the cast (S).

(In the lower sensor 140b, the driving rod 147 penetrates the upper surface of the hull body 145 to drive up and down)

The sensor body 145 exposed to a high temperature environment is provided with a coolant circuit 141 through which coolant is circulated, and an injection tube 142 through which coolant is injected and discharged on the opposite side of one end surface through which the probe 146 passes. ) And the discharge pipe 143 is formed to protrude. In addition, a cooling gas supply pipe 142a through which a cooling gas is supplied is formed between the injection pipe 142 and the discharge pipe 143 to cool the internal space of the sensor body 145. The cooling gas that enters the inside of the sensor body 145 through the cooling gas supply pipe 142a cools the inside of the sensor body 145, and then the lower or upper surface of the sensor body 145 through which the driving bar 147 penetrates. It is discharged to the outside through. At this time, the cooling gas induction cover 145 is coupled between the sensor body 145 and the sensor unit protection cover 146a to guide the discharge flow of the cooling gas in a predetermined direction. On the other hand, the compressed air supply pipe 144 for providing compressed air as a power source to the transducer drive cylinder 148 for driving the transducer 146 is provided on one side of the sensor body 145.

Referring to Figure 5 the thickness measurement method according to the present invention for measuring the thickness (t) of the cast using a cast thickness measuring device configured as described above is as follows.

First, the vertical length L of the master gauge 128 used in the slab thickness measuring apparatus is measured and recognized in various ways. The master gauge 128 is a standard of measurement because the length is not deformed unlike other parts, even if the slab thickness measuring device is exposed to high temperature, it is used as a correction means when measuring the thickness (t) of the slab.

Initial position by a pair of transducers 146 in direct contact with the upper and lower surfaces of the master gauge 128 before the cast (S) passes through the slab thickness measuring device using this master gauge 128 The values S _up and S _down are measured. At this time, the initial position value is measured by the contact displacement sensor 149a (see FIG. 4) provided in the upper sensor 140a and the lower sensor 140b.

In addition, when the slab S passes through the segment 10 (see FIG. 2), the transducer 146 is perpendicular to the upper sensor 140a and the lower sensor 140b which are spaced apart from the upper and lower sides of the slab S, respectively. When the transducer 146 is in direct contact with the upper and lower surfaces of the cast (S) by moving in the direction, the value detected by the displacement measuring magnetic sensor 149b is measured as a displacement value (V _up , V _down ).

Therefore, the thickness t of the cast steel S is calculated as in the following equation.

t = L + (S _up -V _up ) + (S _down -V _down )

Thus, through the cast steel thickness measuring apparatus 100 and the cast steel thickness measuring method according to an embodiment of the present invention can accurately measure the thickness of the cast (S) as shown in the experimental example shown in FIG. Here, FIG. 6 is a result of measuring the thickness of the cast steel continuously for 10 hours using the cast steel thickness measuring apparatus 100 and stagnation of the cast steel (S) every hour and directly measured the thickness of the cast steel using a vernier caliper. A graph showing the results together.

As shown in the graph, the results were consistent within the range of 0.1%, and the results of operating the device for 10 hours or more under the harsh conditions of high temperature and high humidity showed that the reliability of the cast measurement data from the start to the end of the measurement was excellent. have.

Hereinafter will be described with respect to the slab thickness measurement system using the slab thickness measuring apparatus according to the present invention described above.

Figure 7 is a block diagram of a slab thickness measurement system according to an embodiment of the present invention.

Referring to FIG. 7, the slab thickness measuring system according to an embodiment of the present invention includes a measuring unit 300 and a measuring unit 300 that directly contact the slab and provide an initial position value and a displacement value for calculating the thickness of the slab. A driving command for operating the 300 is input, and the client unit 400 for displaying the cast steel measurement data including the thickness of the cast steel and casting information in real time online, and the driving control of the measuring unit 300 through the driving command. The server unit 500 converts the initial position value and the displacement value into the slab measurement data and provides the slab measurement data and the casting information to the client unit 400.

The measuring unit 300 measures the initial position value by directly contacting the transducer to the master gauge which is not subjected to thermal deformation, and the slab thickness measuring apparatus 100 for measuring the displacement value by directly contacting the transducer to the upper and lower surfaces of the cast steel, It is connected to one side of the slab thickness measuring apparatus 100 is composed of a supply unit 200 for providing a power source and a coolant.

Here, the slab thickness measuring apparatus 100 includes a master gauge portion having a support body portion extending in a vertical direction, a master gauge driven in a horizontal direction from one side of the support body portion, and a sensor coupled horizontally to both ends of the support body portion. And a sensor unit coupled to the one end of the support and the sensor support and measuring the displacement value for driving the pair of transducers in the vertical direction to calculate the thickness of the cast by contact with the cast.

The client unit 400 may be connected to the cast steel thickness measuring system in real time online and input a driving command, and may be installed in a remote place as a unit for checking the result (casting data and cast adjustment beams). It is composed of at least one terminal 410 that can be used at the same time or at different places.

By the way, in the present embodiment, when using a plurality of terminals 410 are connected to the slab thickness measurement system at the same time in different remote places, the slab thickness measurement by inputting the driving command of the slab thickness measuring apparatus 100 Since there is a possibility of confusion in driving the device 100, the system is constructed to undergo a user authentication step in order to access the slab thickness measurement system through the plurality of terminals 410. On the other hand, through all the terminals 410 made of user authentication can be viewed in real time without limitation the cast measurement data and casting information, but to input a drive command for driving the cast steel thickness measuring apparatus 100 associated with the casting process It is possible to establish additional user authentication steps to screen users.

The server unit 500 drives and controls the measurement unit 300 through a drive command input from the client unit 400, and transmits casting information to the main server 520 and the main server 520 in which the cast steel measurement data is stored. The data conversion unit 560 for converting the initial position value and the displacement value of the cast slab measured by the casting information providing server 540 and the measuring unit 300 provided in real time to the slab measurement data transmitted to the main server 520 Include. The continuous casting information stored in the casting information providing server 540 is updated in real time by inputting new information by the terminal 410 of the client unit 400.

The main server 520 includes a control unit (not shown) for controlling the slab thickness measuring apparatus 100 and the supply unit 200 of the measuring unit 300, and various signals transmitted to the control unit are power line communication ( Controlled by Power Line Communication (PLC).

Various signals controlled by the controller include an operation start or stop signal by a driving command input from the client unit 400, an apparatus error signal of the slab thickness measuring apparatus 100, and the supply unit 200.

When a device error signal is generated and transmitted to the main server 520, the control unit immediately sends a protection signal to the measurement unit 300 to prevent damage or damage of the measurement unit 300 to stop the operation of the measurement unit 300. Or two-way communication is made to drive the measurement unit 300 differently through a series of processes.

In addition, the control unit converts the initial position value and the displacement value measured in the measuring unit 300 to the slab measurement data and stores it in a storage unit (not shown) of the main server 520.

The data converter 560 converts the initial position value and the displacement value of the analog format measured by the slab thickness measuring apparatus 100 into a digital signal, and transmits the converted slab measurement data to the main server 520. The cast measurement data thus transferred is stored in the main server 520 and is again provided to the client unit 400 by a request of the client unit 400 for reading.

The hot slab thickness measuring apparatus according to the present invention configured as described above can be installed in a narrow space in the segment, and the thickness of the hot slab passing through the segment can be easily measured in a direct contact method. In addition, by using a heat-resistant alloy material that can withstand high temperatures and having a cooling water circuit therein, it is possible to secure excellent operation reliability and measurement data even in poor environments around cast steel and cast steel.

On the other hand, by building a network measurement system using the hot cast thickness measuring device as described above, the thickness of the cast can be measured in real time online, and thus the measured data and continuous casting information of the cast can be easily checked at a remote location. There is convenience.

Therefore, the hot cast thickness measuring apparatus and the network measuring system using the same according to the present invention have the effect of improving the productivity of the continuous casting process and at the same time easily determine the abnormality of the cast can produce a cast having excellent internal quality. .

As mentioned above, although this invention was demonstrated with reference to the above-mentioned Example and an accompanying drawing, this invention is not limited to this, It is limited by the following claims. Therefore, it will be apparent to those skilled in the art that the present invention may be variously modified and modified without departing from the technical spirit of the following claims.

1 is a view showing the installation state of the cast steel thickness measuring apparatus according to an embodiment of the present invention.

FIG. 2 is a side view seen from the direction A shown in FIG. 1; FIG.

Figure 3 is an internal configuration of the cast steel thickness measuring apparatus according to an embodiment of the present invention.

4 is a diagram illustrating an internal configuration of a sensor unit illustrated in FIG. 3.

5 is a view schematically showing a process of calculating the thickness of the cast steel.

Figure 6 is a graph showing an experimental example using the slab thickness measuring apparatus and the slab thickness measuring method according to an embodiment of the present invention.

Figure 7 is a block diagram of a slab thickness measurement system according to an embodiment of the present invention.

<Description of Signs of Major Parts of Drawings>

100: hot cast thickness measuring device 120: master gauge

128: master gauge 130: sensor support

135: rotation cylinder 140: sensor

145: sensor body 146: transducer

149a: contact displacement sensor 149b: displacement measuring magnetic sensor

111, 121, 131, 141: cooling water circuit

300: measuring unit 400: client unit

500: server unit

S: hot casting t: hot casting thickness

Claims (18)

A support body extending in the vertical direction; A master gauge driving in a horizontal direction from one side of the support body; Sensor support parts coupled horizontally to both ends of the support body part; And A sensor unit coupled in a direction intersecting with one end of the sensor support unit and driving a pair of transducers in a vertical direction to measure a displacement value for calculating the thickness of the cast steel by contact with the cast steel; Cast steel thickness measuring apparatus comprising a. The method of claim 1, The supporting body portion is a slab thickness measuring device is installed vertically between a plurality of rollers provided in the segment of the casting device. The method of claim 1, Cast body thickness measuring apparatus is formed in the support body portion, the master gauge portion, the sensor support portion and the sensor portion, a coolant circuit through which a coolant is circulated. The method of claim 1, The support body portion, the master gauge portion, the sensor support portion and the body of the sensor portion is cast steel thickness measuring apparatus made of a heat-resistant alloy of Inconel-based or stainless steel. The method of claim 1, The master gauge unit, the thickness of the cast unit for measuring the initial position value for calculating the displacement value measured in the sensor unit as the thickness of the cast steel. The method of claim 5, The master gauge portion, A master gauge cylinder coupled to a central portion of the support body; A cooling chamber connected to the piston of the master gauge cylinder to move forward or backward in one horizontal direction of the support body and having a cooling water circuit therein; And A master gauge fixed to the inside of the cooling chamber to serve as a reference for the initial position value; Cast steel thickness measuring apparatus comprising a. The method of claim 1, The sensor support portion, An upper sensor support part horizontally coupled to an upper end of the support body part; A lower sensor support part horizontally coupled to a lower end of the support body part; Including, The inside of the upper sensor support portion cast thickness measuring apparatus is provided with a rotating cylinder for rotating the sensor unit coupled in the direction crossing the one end of the upper sensor support. The method of claim 7, wherein The sensor unit includes: an upper sensor coupled to a direction crossing one end of the upper sensor support part to move the probe forward or backward toward a lower direction; And a lower sensor coupled to one end of the lower sensor support to move the transducer forward or backward in an upward direction. The upper sensor and the lower sensor is the thickness of the cast slab facing in a straight line in the vertical direction. The method of claim 8, The upper sensor or the lower sensor, A sensor body coupled in a direction intersecting with one end of the sensor support part and passing a cooling gas to an empty inner space; A driving rod that penetrates one end surface of the sensor body and is attached to the probe having a sensor part protective cover; A probe drive cylinder provided in an inner space of the sensor body to drive the drive rod in a vertical direction; A contact displacement sensor provided at one side of the transducer driving cylinder to measure a displacement value of the transducer driving cylinder; And A displacement measuring magnetic sensor provided on one side of the driving rod in an inner space of the sensor body to measure a displacement value of the driving rod; Cast steel thickness measuring apparatus comprising a. The method of claim 8, Slab thickness measuring apparatus further comprises an elastic member for pushing the transducer to the upper surface or the lower surface of the slab in the inner space of the sensor body. The method of claim 9, Cooling gas passing through the inner space of the sensor body is cast thickness measurement device is discharged to the outside through the one end surface of the sensor body through which the drive rod penetrates. A measuring unit providing an initial position value and a displacement value in direct contact with the cast steel to calculate the thickness of the cast steel; A client unit to which a driving command for operating the measuring unit is input, and which displays cast measurement data including the thickness of the cast steel and casting information online in real time; A server unit which drives the measurement unit through the drive command, converts the initial position value and the displacement value into the slab measurement data and provides the slab measurement data and casting information to the client unit; Cast thickness measurement system comprising a. The method of claim 12, The measuring unit, A slab thickness measuring device for measuring the initial position value by directly contacting the transducer with a master gauge which is not subjected to thermal deformation, and measuring the displacement value by directly contacting the probe with upper and lower surfaces of the slab; A supply unit connected to one side of the slab thickness measuring device to provide a power source and a coolant; Cast thickness measurement system comprising a. The method of claim 13, The cast steel thickness measuring device, A support body extending in the vertical direction; A master gauge part having the master gauge driven in a horizontal direction from one side of the support body part; Sensor support parts coupled horizontally to both ends of the support body part; And A sensor unit coupled to the one end of the sensor support unit and measuring the displacement value for driving the pair of transducers in a vertical direction to calculate the thickness of the slab by contact with the slab; Cast thickness measurement system comprising a. The method of claim 12, The client unit is composed of at least one terminal installed in a remote place, the cast steel thickness measuring system is required to authenticate the user to connect the terminal to the server unit. The method of claim 12, The server unit, A main server for controlling driving of the measuring unit by the driving command input from the client unit, and converting and storing the initial position value and the displacement value measured by the measuring unit into the slab measurement data; Casting information providing server for providing the casting information to the main server; And A data converter converting the initial position value and the displacement value measured by the measuring unit into a digital signal and transmitting the digital signal to the main server; Cast thickness measurement system comprising a. Recognizing the vertical length of the master gauge which does not cause thermal deformation; Measuring an initial position value by directly contacting a pair of transducers on upper and lower surfaces of the master gauge; Measuring a displacement value by directly contacting the pair of transducers with upper and lower surfaces of a cast steel; And Calculating a thickness of the cast steel using the vertical length of the master gauge, the initial position value, and the displacement value; Cast thickness measurement method comprising a. The method of claim 17, In calculating the thickness of the cast steel, The thickness of the slab is calculated by summing the difference between the initial position value and the displacement value to the vertical length of the master gauge.

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