JP2003208687A - Apparatus for processing measurement information used in steel manufacturing equipment and breakout prediction method using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technology not causing increase of the wiring number and complication of wiring even if measurement positions increase, and capable of dispensing with use of a compensation conduction wire especially when applying the technology to temperature measurement. <P>SOLUTION: This processor comprises a plurality of measurement probes detecting measurement information showing states of steel production equipment or steel products produced thereby as electrical signals, and a calculation device applying a specific process to the measurement information. The measurement probes are mutually are crossover-wired and are connected in a serial chain-like state to reduce the number of conductors connecting the measurement probes and the calculation device compared to the number of the measurement probes. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention detects a physical or chemical state of a steel manufacturing facility and a steel product manufactured by the steel manufacturing facility as an electric signal, and the detected measurement information can be transmitted to a place apart from a measurement site. The present invention relates to a processing device that guides and processes.

[0002]

2. Description of the Related Art In steelworks and the like, it is important to maintain the quality of products by obtaining information on the physical or chemical state of steel manufacturing equipment and the steel products manufactured by the equipment. Here, the steel manufacturing equipment is defined as a concept including steel making equipment such as a continuous casting machine, rolling equipment (hot rolling, cold rolling), and a building housing these equipment groups. For example, in a continuous casting machine, it is important to predict breakout and detect the position of the molten steel surface, but these have been conventionally implemented by the following methods. The breakout prediction method and the molten steel molten metal surface position detection method are disclosed in Japanese Patent Nos. 1676492 and 16
As described in No. 22792, in order to carry out these with a continuous casting machine, as shown in FIGS. 11 and 12, a plurality of temperature measuring probes A are arranged on the anti-melting steel side of the copper plate of the mold 1, and these temperature measuring probes A are arranged. This is performed by analyzing the temperature information output by each of the temperature probes A. The temperature measuring probe A protects a thermocouple element 2 such as a platinum wire with a metal coating having excellent corrosion resistance and heat resistance, or a protective tube 3 (usually
(Made of high-purity alumina), a connector plug 4 is provided at the rear end of these protective tubes, and the thermocouple wire is connected to the compensating lead wire 9 via the connector terminal provided on the connector plug 4. The temperature is measured by bringing the temperature-sensitive portion such as the metal coating portion or the tip of the protective tube 3 into close contact with the mold copper plate. In order to prevent the entry of cooling water or the like, it is said that it is preferable to adopt a structure using a stopper ring or packing as described in, for example, Utility Model Registration 1987039. In this temperature measurement, conventionally, an electromotive force, which is an analog signal (voltage) generated between the thermocouple wires 2 and 2, is connected to the compensating lead wire 9 via a connector terminal and led out to the outside of the protective tube, and this analog signal is output. The signal was converted to the temperature (° C.) by the temperature converter where the signal was guided to the temperature converter 10 arranged far away.

[0003]

However, the temperature measuring device including the temperature measuring probe, the temperature converter, and the compensating lead wire connecting both of them has various problems. First of all, since the output of the temperature measuring probe A is guided to the temperature converter 10 by using the compensating lead wire 9, the compensating lead wire which is several times more expensive than the general lead wire is the connector 4
The quantity is required, and the whole becomes extremely expensive. Further, as shown in FIG. 11, the temperature measuring probe, the compensating lead wire, and the temperature converter must be handled as one set,
Therefore, for example, when installing temperature measuring probes at 20 locations and performing breakout prediction, 20 sets of the temperature measuring probe, the compensating lead wire, and the temperature converter, which are one set, are required. As a result, as many as 20 compensating lead wires were protruding toward the outside of the mold. Then, when replacing the mold, all of the 20 or more compensating lead wires had to be manually connected or disconnected. In addition, one terminal is provided in the middle of the compensating lead wire and 20
Although some efforts have been made to connect the compensating lead wire of the book in advance and then remove it, the replacement of the mold has been troublesome.

Further, since the temperature measuring probe, the compensating lead wire and the temperature converter are handled as one set, even if only one of the 20 compensating lead wires is broken, these 1
There was a waste of having to replace the entire set and discarding the parts that were still usable. Also in FIG.
In the case where the temperature converter 10 is shared as shown by, it is necessary to reconnect 20 sets of wiring to the temperature converter 10, resulting in enormous labor, time and cost.

[0005]

The present invention has been made in order to solve the above problems, and as a result of intensive studies by the inventors, the temperature measuring probes are wired to form a serial chain. The inventors have found that the above problems can be solved by connecting such wires, and have completed the present invention.
The invention can be applied not only to temperature information but also to measurement of other physical state quantities and chemical state quantities. The present invention based on such an idea, a plurality of installed measurement probes that detect measurement information indicating the state of a steel manufacturing facility or a steel product manufactured thereby by an electric signal, and perform a specific process on the measurement information. A device composed of an arithmetic unit, wherein the measurement probes are wired in series and connected in a serial chain, and the number of conducting wires connecting the measurement probe and the arithmetic unit is made smaller than the number of the measurement probes. It is a processing device. By adopting such a configuration, output signals from a plurality of probes are combined and flow on the same conducting wire, and the number of wirings can be drastically reduced.

It is preferable that an analog / digital converter and a transmitter are incorporated in the connector plugs of the plurality of measurement probes installed, and that power is supplied to them from outside the probe through a lead wire. By doing so, it becomes possible to combine the signals of different measurement probes on the common conductor and distribute them, and when using a temperature measuring element, the compensating conductor which was required in the past is not necessary. You can

The measuring elements incorporated in the plurality of measuring probes are those for detecting the physical and chemical state quantities of the object to be measured as analog electric signals, and for example, thermocouples, strain gauges, vibrators, etc. are applied. it can.

It is preferable that the analog / digital converter and the transmitter built in the connector plug are integrally formed together with the connector terminal on a common printed circuit board. As a result, the assembly of the measurement probe is facilitated and at the same time, it can be integrated into one chip.

Such an apparatus can be used, for example, for predicting breakout in a continuous casting machine. As applied to breakout prediction, the temperature measuring probe is placed at the melt level near the melt level in the cast in the mold and at the melt level remote position where there is no melt in the cast in the mold. . This temperature measuring probe has the structure of the above-mentioned measuring probe. The distribution pattern of the frequency components included in the temperature waveform with respect to the time change detected at each of the parts is analyzed by the plurality of temperature measuring probes. When the distribution pattern of the frequency component detected at the remote position of the molten metal level is similar to the distribution pattern of the frequency component detected at the near position of the molten metal level, which should not be the case under normal conditions, it is judged as a sign of breakout. It is a thing.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The concept of a "measuring probe" in the present invention will be described prior to describing the embodiments. The measuring probe has a measuring element, a function of converting an analog signal output by the measuring element into a digital signal, and a function of transmitting the converted digital signal to the outside of the probe. The measuring element is for detecting a physical or chemical state quantity of an object to be measured, and is an element for outputting a measurement result as an analog electric signal. Although application to a measuring element that outputs a digital electric signal is not prohibited, there is no point in performing analog / digital conversion on a measuring element that outputs a digital signal. However, it is forbidden to use a measurement probe using a measurement element that directly outputs such a digital signal in combination with a measurement probe that converts the analog signal output of the measurement element into a digital signal by the method of the present invention. Absent.

Examples of the measuring element include a thermocouple, a resistance temperature measuring element, a strain gauge, and an oxygen measuring element. These are measuring elements that do not require external power supply for operation, but instead of these, they may be elements that operate by receiving external power supply. Further, it does not matter whether the measuring element is a passive element or an active element. The analog / digital converter converts the analog signal output by the measuring element into a digital signal. The transmitter is a device that sends out the digital signal output from the analog / digital converter via a conductor. In addition to these, an amplifier may be mounted to enhance the signal output of the analog / digital converter.

The details of the present invention will be described below with reference to the drawings. 1 and 2 show an example of obtaining temperature information of a mold of a continuous casting machine. Mold 1 for continuous casting machine (not shown)
In order to obtain the temperature information of, the wall surface of the four faces of the mold 1 of the continuous casting machine is conventionally left with a wall thickness of several mm to several tens of mmm from the back side of the wall surface on the molten steel contact side to the inner surface. 20 sets with the measurement probe A penetrated deep into the wall (12 sets are shown in the figure)
Although the temperature measuring probes were arranged to some extent, these temperature measuring probes were replaced with analog / digital converter built-in type measuring probes in this embodiment. The temperature probe A used in this embodiment has a set of thermocouple element 2, analog / digital converter 5, amplifier 17, and transmitter 6 built therein. The external appearance is a structure in which a connector plug 4 is attached to a protective tube 3, a thermocouple wire 2 is internally provided in the protective tube 3, and an analog / digital converter 5, an amplifier 17, and a transmitter 6 are provided in the connector plug 4. Built in. The temperature measuring probe A having such a configuration is shown in FIG.
As shown in, multiple points are arranged on the side surface of the mold 1. For example,
Assuming that the number is 20 sets, these 20 sets of temperature measuring probes are connected in series in a crossover manner by a pair of inexpensive general conductors 7a. It is the general conductor that is used here, not the compensation conductor. Since the lead wires are connected in series, the length thereof is one tenth or less as compared with the conventional one in which the compensating lead wires drawn out from the respective temperature measuring probes are wired in parallel. Further, since all the crossover conductive wires can be housed in the back plate of the mold, the water cooling structure of the mold 1 can be used for cooling the conductive wires, and it is not exposed to dust around the outside of the mold, and the probability of damage is drastically reduced. And the life can be significantly extended.

A specific method of connecting the wires is to sequentially connect the temperature measuring probe of the first set to the temperature measuring probe of the second set with a pair of inexpensive general conductive wires in a crossover manner, and finally to the last two.
The digital arithmetic unit 8 is connected by a pair of general conductive wires 7b extending from the connector 4 of the thermocouple of the 0th set. Therefore, what is out of the mold 1 is a pair of inexpensive general conductors 7b.
Will only be. At the time of mold replacement, only the general conductor 7b needs to be attached and detached. The analog / digital converter 5, the amplifier 18, and the transmitter 6 in the connector plug 4 were supplied with electric power from the side of the digital arithmetic unit 8 through the general conductor 7b. A specific temperature value of the temperature information in the digital signal format transmitted to the digital arithmetic unit 8 through the general conductor 7b is calculated by the digital arithmetic unit.

In the present invention, electronic components such as an analog / digital converter and a transmitter are built in the connector plug of the measurement probe, so it is necessary to avoid exposing the connector to high temperatures. As a result of a test conducted by the present inventor, it has been confirmed that it is preferable to use the measuring probe having such an electronic circuit at 70 ° C. or lower as a use condition. Therefore, it is preferable to prevent the temperature of the connector from becoming too high by providing a dedicated cooling structure around the connector or by diverting the existing cooling structure of the mold.

Although the description here relates to temperature measurement, the physical quantity to be measured is not limited to temperature. Then, by analyzing the fluctuation frequency distribution pattern of the measurement information obtained by the device of the present invention online, it is possible to predict and detect not only various information about the object to be measured but also the deterioration tendency and wear state of the measuring element. Become. Therefore, erroneous detection due to deterioration of the measuring element can be eliminated. Examples of the information regarding the object to be measured include position detection of the molten steel molten metal level in the mold, a breakout prediction system, and the like, and extremely accurate measurement regarding these is possible.

Further, according to the present invention, since the temperature information is obtained as a digital signal, long-term temperature fluctuations caused by fluctuations in the casting speed and atmospheric temperatures that occur during normal operation, mold vibrations, and mold vibrations If it is understood by distinguishing it from short-term temperature fluctuations caused by fluctuations in the molten steel surface level, etc., the instantaneous cycle that tends to be different from the information contained in the temperature waveform output by the temperature probe. An extremely accurate breakout prediction system can be constructed by extracting and analyzing only the signal of. In addition, it is considered that the solidification non-uniformity that occurs in the mold is caused by the mold vibration and the fluctuation of the molten metal surface level.For these as well, it is possible to obtain high accuracy by analyzing the cycle of mold vibration online using a strain gauge. It is possible to obtain various analysis information. As described above, according to the present invention, various information important for maintaining product quality can be measured online in a continuous casting machine, and an abnormal situation can be immediately dealt with. Hereinafter, examples in which the present invention is specifically applied to an operation site will be described. Although strain gauges and optical sensors are used in the following embodiments, these include analog / digital converters, amplifiers and transmitters in addition to their respective elements, and are defined as measurement probes in the present invention. However, the names of commonly used strain gauges and optical sensors will be used as they are.

Example 1 An example of obtaining mold vibration information of a mold of a continuous casting machine (not shown) will be described. For each of the four wall surfaces of the rectangular-shaped mold of the continuous casting machine, one set of strain gauges (strain measurement probes) was arranged on the back side of the wall surface on the molten steel contact side, for a total of four sets.
One set of strain gauges includes a strain gauge element, a protective tube for protecting the strain gauge element, and a connector plug for guiding an electric signal output from the strain gauge element to an external device. In addition, the connector plug has a built-in analog / digital converter, amplifier, and transmitter.
The four sets of strain gauges are connected to each other in a bridging manner by a pair of inexpensive general conductors, and the strain gauges are connected in series. We decided to store all the general conducting wires connected in a crossover shape in the back plate of the mold. The connector plug of the fourth set of strain gauges and the digital arithmetic unit are connected by a pair of inexpensive general conductive wires. Then, power is supplied to the connector terminal from the digital arithmetic unit. Therefore, only a pair of inexpensive general conductors were exposed from the mold to the outside. At the time of mold replacement, it was sufficient to attach and detach only this general conducting wire.

(Embodiment 2) An optical sensor (light measuring probe) was arranged between the conveying rolls of the rolling mill to install a device for obtaining temperature information on the surface of the rolled thin plate. The optical sensors were arranged at 10 positions in the width direction of the thin plate. An analog / digital converter and transmitter were built into the connector at the top. The analog / digital converter, amplifier, and transmitter are all integrated in one IC chip. The ten sets of photosensors were wired together by a pair of inexpensive general conductors, and the photosensors were connected in series. Since there was a space where there was no clearance through the general conductor, we decided to wirelessly transmit the digital signal to the digital arithmetic unit. The connector plug of the tenth set of optical sensors and the digital arithmetic unit are connected by a pair of inexpensive general conductive wires. Therefore, only a pair of inexpensive general conductors are exposed outside the surface temperature measuring device for the thin plate. When exchanging the transport roll, it was sufficient to attach and detach only this general conductor.

(Example 3) 100 strain gauges (strain measuring probes), 100 temperature measuring probes and 10 optical sensors (light measuring probes) were arranged on the floor surface, wall surfaces and columns in the factory building. Each has one connector plug, and the connector plug has a built-in analog / digital converter, amplifier, and transmitter. The measuring elements arranged on the floor were connected by a general conductor, but the measuring element group arranged on the pillar and the measuring element group arranged on the floor were wirelessly transmitted without using a conductor. In this manner, the connectors were sequentially connected by the general conductor in a serial transmission manner, and the connector plug of the last thermocouple and the digital arithmetic unit were connected by a pair of inexpensive general conductors. All analog electric signals obtained from these are AD-converted, amplified by an amplifier, and connected to a transmitter. When transmitting from the AD converter to the amplifier, each digital signal has an ID so that it can be identified which thermocouple signal and which strain gauge signal.
Are sequentially given. With the digital computing device, it is now possible to instantly determine whether the vehicle is on the floor, wall, or pillar inside the factory building, making it possible to operate the vehicle automatically.

(Embodiment 4) In order to measure the furnace body temperature and furnace body vibration of a converter (not shown), ten thermoelectric elements were passed from the outside of the refractory wall through the space between the iron shell of the converter and the refractory wall. Pairs and 10 strain gauges (strain measuring probes) were placed. The vibration of the furnace body was placed in the water-cooled jacket of the iron shell, and packing and stopper rings were used for water resistance. In order to measure the temperature to estimate the wear of the wall surface of the refractory inside the converter, the steel shell is pierced into the refractory and the thermocouple covered with a protective tube and a connector is embedded and sealed there. did. In the past, compensating conductors were connected to each thermocouple and strain gauge, so a bundle of as many as 20 conductors had to be passed through the converter trunnion, and the structure was complicated, and mold replacement work was required. So it took a day. Therefore, this time, all the thermocouples and strain gauges were replaced with the converter built-in connector plug of the present invention. Further, the numbers of thermocouples and strain gauges were increased to 50 each. Adjacent strain gauges were connected in series with each other by inexpensive general conductors in series, and the last general conductors of the strain gauges were connected to a digital arithmetic unit arranged away from the converter furnace body. In case of damage to this conductor, the transmission chip with a built-in connector plug has a wireless function that allows transmission between the connector plug of the last strain gauge and the digital arithmetic unit without using any conductor. . Therefore, it is not necessary to pass the bundle of conductors into the trunnion supporting the converter furnace body, and only a pair of inexpensive general conductors are exposed outside the furnace body. At the time of replacement, all that is required is to attach / detach this general conducting wire, which reduces the work load and shortens the work time.

(Embodiment 5) A strain gauge (strain measuring probe) and an accelerometer (acceleration measuring probe) are attached to a housing housing and a roll check of a rolling mill at a plurality of positions, respectively, and rolling load and vibration are measured. We performed rolling control to control the temperature and equipment diagnosis related to the possibility of abnormal vibration and chatter marks on the copper plate. The strain gauge has a strain gauge element, the accelerometer has an acceleration element, and both the strain gauge and the accelerometer have an analog / digital converter, an amplifier, and a transmitter. As shown in FIG. 3, the strain gauge 11 is attached to a housing 17 in which four rolls of an upper backup roll 13, an upper work roll 14, a lower work roll 15, and a lower backup roll 16 are attached side by side in the vertical direction as shown in FIG.
There are a total of four places on the left and right sides of the inlet and the outlet, and the accelerometers 12 are attached on the left and right sides of the upper and lower work rolls 14 and 15 at a total of eight places. The four strain gauges 11 and the eight accelerometers 12 are wired by using the general conductor 7a, and the strain gauge 11 located at the end of the crossover is provided by the general conductor 7b at a position away from the rolling mill. It was connected to a digital processing unit. The general conductors 7a and 7b are not only a communication transmission line but also a power supply line.
The output signals of the strain gauges 11 and the accelerometers 12 are given IDs to distinguish the signals from each other. 5 and 6 show the frequency components analyzed after Fourier transforming the output signal waveform from the strain gauge. FIG. 5 shows a vibration frequency distribution in a normal state, and FIG. 6 shows a vibration frequency distribution in an abnormal state. The two small peaks in the graph of FIG. 5 represent the natural vibration of the rolling mill. On the other hand, the large peak on the right side of the graph of FIG. 6 represents the natural vibration of the rolling mill when the steel plate and the rolling mill are connected. When this vibration becomes large, the steel plate vibrates (chatters), so that scratches called chatter marks occur on the surface of the steel plate. In controlling the rolling mill, it is important to control so that this large peak does not appear. According to the present embodiment, the load of the rolling mill can be easily measured, the chattering of the steel sheet can be prevented from occurring, or the occurrence of chattering can be immediately grasped. According to the present embodiment, the conventional load cell can be eliminated, and the control system can be applied as it is. Further, in the present embodiment, since a single type of cable is used for wiring different types of measuring elements, it is possible to easily pass the wiring even inside a complicated rolling mill.

(Embodiment 6) A plurality of temperature measuring probes are arranged on each of the four surfaces of the mold, and a breakout prediction system is constructed based on temperature information obtained from these temperature measuring probes. Each temperature probe has an analog / digital converter,
An amplifier and a transmitter were incorporated, and an ID was given to the output signal in order to distinguish the temperature information of each temperature measuring probe. The temperature waveform with the horizontal axis representing the time axis output from each temperature measuring probe was Fourier-transformed to analyze its frequency component. The results are shown in FIGS. Breakout is an outer shell (shell) formed by cooling and hardening molten steel in the upper region of the mold when continuously pulling out slabs from the mold, due to mold vibration and fluctuations in the molten metal level. Its thickness varies,
This is a phenomenon in which molten steel erupts when the portion that becomes excessively thin ruptures, but such a situation is dangerous and must be absolutely avoided. Predicting the occurrence is extremely important. In this embodiment, this is done by frequency analysis of the temperature waveform. That is, the temperature change of each part of the mold with respect to the time axis is captured as a waveform, and the frequency component of this waveform is analyzed to detect the sign of breakout from the phenomena that cause the waveform variation. In order to carry out such a measurement, the temperature measuring probe is deeply inserted into the perforation provided in the mold, and the temperature sensing part is arranged so as to approach the inner surface of the mold, and the outer shell of the outer shell adhered to the inner surface of the mold is formed. It is configured so that the influence of the thickness on the inner surface of the mold can be detected. An outer shell is formed on the inner wall of the mold above the mold into which the molten steel is poured. This outer shell is formed as a result of the injected molten steel being cooled at the inner wall of the mold, and this outer shell becomes thicker as it moves downward from the molten metal level, and at a position far from the molten metal level, Almost the entire area of the cross section is in a cured state, and the temperature at these positions becomes stable. FIG. 7 is a graph obtained by measuring the time change of the temperature waveform at a position close to the molten metal level and Fourier transforming this. In this figure, 2 in the high band
Although there are two peaks, the peak on the left is due to the fluctuation of the molten steel level and the peak on the right is due to the natural vibration of the mold. Further, the deterioration of the temperature measuring element itself can be determined from the state of the graph in the low band. That is, as shown in FIG. 8, if the measurement result in the state in which the normal operation of the temperature measuring element is confirmed is represented by the curve s, it is in a substantially parallel relationship with this, and the curve u showing the same tendency, Since u is shifted from the curve s due to the difference in operating conditions, it is determined that the temperature measuring element is not abnormal. On the other hand, when the measurement result is the curve s, the tendency is obviously different from the curve s,
In such a case, it is determined that the temperature measuring element has deteriorated. Thus, by paying attention to the measurement result in the low band, the reliability itself of the measurement result in the high band can be confirmed. The evaluation of the measurement results in the high band can be understood by analyzing the measurement results detected by the temperature measuring element (thermocouple) arranged at a position close to the molten metal level and the temperature measuring element (thermocouple) arranged at a far position. . Figure 9 shows the measurement results with a thermocouple placed near the level of the molten metal,
FIG. 10 shows the measurement results obtained by a thermocouple located far from the molten metal level. At the position close to the molten metal level (shown in FIG. 9), two peaks appearing due to the fluctuation of the molten metal level and the natural vibration of the mold show a solid line even at a position distant from the molten metal level (shown in FIG. 10). If it is detected as shown, it is determined to be abnormal. When the mold is moved away from the molten metal level, the inside of the mold is almost in a state of being cooled and hardened, and it should not be affected by the fluctuation of the molten metal level or the natural vibration of the mold. That is, if it is normal, it should show an attenuation tendency with a gentle curve as shown by the broken line in FIG. On the other hand, as described above, if the fluctuation of the molten metal level and the influence of the mold natural vibration are exerted even at the position far from the molten metal level as shown by the solid line in FIG. It means that the inside of the mold at the position is not in a stable cooling and hardening state, which means that there is a risk of breakout.

Although various embodiments have been described above, the present invention is not only particularly effective for application to steel manufacturing sites, but also excellent when applied to other equipment related to steel manufacturing equipment. Take effect.

[0024]

According to the first aspect of the invention, since the measurement probes are wired to each other and connected in series, the number of wires drawn from the measurement probe can be significantly reduced. Can derive signals from all measurement probes with one wire. Therefore, even when the measurement information is obtained from a large number of points, the measurement signals can be taken out from a large number of measurement probes without increasing the number of wires. In addition, since the number of wires is small, the measurement probe can be easily installed, and the measurement probe can be installed in a complicated part which has been difficult to install due to the difficulty of wiring in the related art. Even when the wiring needs to be cooled, it can be applied very easily even when other cooling means is diverted or provided independently.

According to the second aspect of the present invention, when the connector plug has the analog / digital converter built therein and the power is supplied to the analog plug through the signal-conducting lead wire, the measurement probe outputs the output. It is possible to combine the digital signals to be distributed on a common conductor and distribute them, and the separation on the receiving side becomes easy. Moreover, since the communication line and the power line are shared, the dedicated power line is not required. Also, especially when using a temperature probe,
It also eliminates the need to use expensive compensation leads.

When various measuring elements are used as in the invention according to claim 3, the number of wirings can be increased while arranging a large number of measuring probes for various physical and chemical state quantities. Can be measured without. Moreover, it is also possible to transmit measurement information regarding different physical quantities through a common conductor.

According to the invention of claim 4, analog /
If the digital converter and the transmitter are integrally formed on a common printed circuit board together with the connector terminals, the device can be downsized and can be integrated into a single chip, and the analog / digital converter and the transmitter can be formed. It is possible to provide a measurement probe incorporating the at low cost.

According to the invention of claim 5, claims 1 to
When the temperature inside the mold is analyzed using the measurement probe described in 4, the breakout prediction can be performed online, and effective measures for preventing the breakout can be executed early. .

[Brief description of drawings]

FIG. 1 is an explanatory view showing a measurement probe attached to a mold.

FIG. 2 is an explanatory view showing a state in which measurement probes are installed at a plurality of points on a wall surface of a mold.

FIG. 3 is a side view showing the outline of a rolling mill.

FIG. 4 is a front view showing an outline of a rolling mill.

FIG. 5 is a graph showing a vibration frequency distribution of a rolling mill in a normal state.

FIG. 6 is a graph showing the vibration frequency distribution of the rolling mill in an abnormal state.

FIG. 7 is a graph showing the frequency distribution of the temperature waveform on the mold wall surface.

FIG. 8 shows the frequency distribution of the temperature waveform on the mold wall surface,
The graph which shows the abnormality detection example of a measurement probe.

FIG. 9 shows the frequency distribution of the temperature waveform on the wall surface of the mold,
The graph which shows the example of a measurement in the position near a molten metal level.

FIG. 10 is a graph showing an example of measurement at a position far from the molten metal surface level in the frequency distribution of the temperature waveform on the mold wall surface.

FIG. 11 is an explanatory view showing a measurement probe attached to a mold, which is a conventional example.

FIG. 12 is an explanatory view showing a conventional example, in which measurement probes are installed at a plurality of positions on a wall surface of a mold.

[Explanation of symbols]

1 mold 2 Thermocouple wires 3 Thermocouple wire protection tube 4 connectors 5 analog / digital converter 6 transmitter 7a General conductor 7b General conductor 8 Digital computing device 9 compensation lead wire 10 Temperature converter 11 strain gauge A measuring probe 12 Accelerometer 13 Upper backup roll 14 Top work crawl 15 Lower work roll 16 Lower backup roll 17 amp

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) C21C 5/46 C21C 5/46 Z G01D 21/00 G01D 21/00 G G01K 7/02 G01K 7/02 E (72) Inventor Kyoji Okumura 2-6-3 Otemachi, Chiyoda-ku, Tokyo Within Nippon Steel Co., Ltd. (72) Inventor Kazuharu Hanazaki 1-7-40 Mishimae, Takatsuki-shi, Osaka Helus Electronite Co., Ltd. In-house (72) Inventor Yukio Terauchi 1-7-40 Mishimae, Takatsuki-shi, Osaka Herous Electro Night Co., Ltd. (72) Inventor Hiroaki Kosaka 1-7-40 Mishimae, Takatsuki-shi, Osaka HELEUS ELECTRO Knight's F term (reference) 2F073 AA02 AA40 AB02 BB04 BC01 CC03 CD16 CD24 FG04 GG04 GG05 GG09 2F076 BA01 BD05 BD07 BD10 BD12 BD13 BD19 BE05 BE09 BE 17 4E004 MC11 MC12 MC16 MC24 NC01 4K070 BE03 BE10 BE20

Claims (5)

[Claims] 1. A steel production facility and a plurality of installed measurement probes for detecting measurement information indicating a state of a steel product produced by the equipment as an electric signal, and an arithmetic unit for performing a specific process on the measurement information. In the device described above, the measurement probes are wired in series and connected in series, and the number of conductors connecting the measurement probes and the arithmetic unit is smaller than the number of the measurement probes. Measurement information processing equipment used in steel manufacturing equipment. 2. A plurality of measuring probe connector plugs that are installed are operated by receiving electric power from the outside of the probe through a conducting wire, and convert an analog signal output by a measuring element incorporated in the measuring probe into a digital signal. An analog / digital converter and a transmitter for operating by receiving electric power from the outside through the analog / digital converter and transmitting the converted digital signal to the outside of the probe through a lead wire are incorporated. An apparatus for processing measurement information used in the steel manufacturing facility according to claim 1. 3. A measuring element incorporated in a plurality of measuring probes includes at least one of a thermocouple, a strain gauge, and a vibrator for detecting physical and chemical state quantities of an object to be measured as an analog electric signal. The processing device for measuring information used in the steel manufacturing facility according to claim 1 or 2, characterized in that. 4. An analog / built-in connector plug
The processing device for measuring information used in a steel manufacturing facility according to any one of claims 1 to 3, wherein the digital converter and the transmitter are integrally formed with a connector terminal on a common printed circuit board. . 5. A mold for drawing out a slab in a continuous casting machine, at a molten surface level close position where a molten part is present in the in-mold slab and a molten surface level remote position where there is no molten part in the in-mold slab. , The measurement probe according to any one of claims 1 to 4 is arranged, and the distribution pattern of the frequency components included in the temperature waveform with respect to the time change detected at each of the parts is analyzed, and the melt level remote position is measured. The distribution pattern of the frequency components detected in
When it is similar to the distribution pattern of the frequency component detected at the position close to the level of the molten metal that should not be similar in the normal state,
A breakout prediction method that judges a sign of breakout.