KR100916237B1 - 3-dimension measuring system of hopper using radial rays - Google Patents

Abstract

SUMMARY OF THE INVENTION An object of the present invention is to provide a three-dimensional measurement system of a hopper using radiation capable of three-dimensional measurement of raw material levels in a hopper using a radioisotope and a refractory brick condition in the hopper and easy self-calibration. .

The measuring system of the present invention is an annular rail 501 and a gear 502 provided on the base 503 around the cylindrical hopper 14, and rotates along the rail and the gear by the driving of a motor and the horizontal of the hopper. The source part rotating table 200 and the detection part rotating table 400 which are installed to face each other on the central axis, and the radiation source part 100 which is installed in the respective source part and the detecting part rotating table to emit radiation and detect the emitted radiation And a control unit 620 for generating a control signal of the radiation source unit 100, a control signal of the radiation source unit 100, and a driving control signal for each rotating stage, and a level meter unit for processing the detection signal of the radiation detection unit 300 ( 630, and a computer 601 for providing a radiation device control signal to the level meter unit and control unit, processing, outputting, and storing the received raw material level information.

Radiation, raw material level, isotope, hopper, 3d

Description

3-Dimension measuring system of hopper using radial rays

1 is a conceptual diagram illustrating raw material level measurement using conventional radiation.

2 is a diagram illustrating a raw material level measurement state of a conventional radiation method.

3 is an explanatory view of a raw material level measurement error of a conventional radiation method.

Figure 4 is a block diagram of the system related to the measurement of the hopper using the radiation of the present invention.

5 is a plan view of the measurement system of the present invention.

6 is a perspective view showing the installation state of the radiation source portion of the present invention.

7 is a perspective view showing an installation state of the radiation detection unit of the present invention.

8 is a cross-sectional view of FIG. 4.

9 is a cross-sectional view of FIG. 6.

10 is a cross-sectional view of FIG. 7.

11 is an explanatory diagram for a raw material height calculation method according to the present invention.

12A and 12B are explanatory diagrams of a raw material density calculation method according to the present invention.

13 is a graph of density and radiation dose values of raw materials.

14 is a three-dimensional screen output state diagram of the measurement state in accordance with the present invention.

15A, 15B, and 15C are flowcharts illustrating the operation process of raw material measurement, hopper inspection, and calibrator of the present invention, respectively.

※ Explanation of symbols about main part of drawing ※

14 hopper 100: radiation source portion

200: source part rotating table 210: plate

211: plate case 212: plate support

213: drive shaft 220: plate driving motor

221: plate encoder 230: calibration switching device

231: rotary worm shaft 232: switching drive motor

233: switching encoder 234: drive gear

235: support band 240: source portion support

241: drive base 242: rotating motor

243: encoder 244: fixed base

300: radiation detector 301: detector

400: detection unit rotating table 401: detection unit support

402: drive base 403: rotary motor

404: encoder 405: fixed base

410: drive gear 501: rail

502: gear 503: base

510: cable 511: cable drum

512 correction box 601 computer                 

602: monitor 603: three-dimensional screen

620: control unit 630: level system unit

The present invention relates to a three-dimensional measurement system of a hopper using radiation, and more specifically, to measure the level of the raw material inside the hopper in three dimensions by using a gamma ray radioisotope, and to determine the state of the refractory brick in the hopper. The invention relates to a three-dimensional measurement system of a hopper using radiation that enables self-calibration and occasional sample measurement.

As is well known, radiation techniques are used to measure raw materials in hoppers.

FIG. 1 is a measurement conceptual view illustrating how a raw material level measurement in a hopper using a conventional radioisotope is performed. The raw material 1 used in an ironworks is charged into a hopper through a gate 13 of a hopper. It is transported by falling to the belt 2 through the control gate 12, which is sealed to the outside in a high temperature state such as a shaft kiln of lime, and the surface flow of the raw material is severe. In a difficult environment, the gamma ray radioisotope 101 is transmitted to the hopper on one side, and the radiation detector 301 measures the amount of radiation that is blocked by the raw material in the hopper or the amount of radiation transmitted in the absence of the raw material. The amount of raw material in the hopper is measured.

2 is a cross-sectional view showing a conventional raw material level measurement, the radiation 102 from the radioisotope 101 installed on one outer wall 10 of the hopper 14 penetrates the refractory brick 11 and faces the opposite outer wall 10. The radiation 102 that reaches the detector 301 attached thereto is converted into light energy across the synthesizer inside the detector 301, and the converted light energy is changed from MPM to electrical energy for controlling in the amplifier. Step up to the voltage value to be used as, and the level of the raw material (1) is measured using the detector value thus obtained.

However, the raw material level measurement in the hopper by the conventional method may bring an error depending on the situation.

3 is a cross-sectional view showing a problem of the prior art, and since the radioisotope 101 and the detector 301 are fixed to the outer wall 10 of the hopper 14, raw materials are not normally accumulated in the hopper 14. When the raw material 21 is generated, the radiation meter recognizes that there is no raw material 1 even though there is no more raw material 1 that can actually be sent to the belt 2.

Therefore, normal raw material level control cannot be performed, and if any part of the refractory brick 11 is broken due to long use, heat is transferred to the outer wall 10 when the damaged part 20 of the refractory brick is generated. It can cause an accident.

In particular, when a measurement deviation occurs due to the change in the internal environment of the hopper 14 and the deterioration of the equipment, the calibration work should be performed. Since the work must be performed by two or more workers, the calibration work is difficult and difficult. There is a drawback to not being able to work.

The present invention is to solve the above-mentioned problems, the object of the present invention is to use a radioisotope, three-dimensional measurement of the raw material level in the hopper and the refractory brick state of the inside of the hopper can be easily measured and self-correction To provide a three-dimensional measurement system of the hopper using a radiation.

Measuring system of the present invention for achieving the above object is the measuring system of the present invention is an annular rail and gear provided on the base of the cylindrical hopper circumference, and rotates along the rail and gear by the drive of the motor and the horizontal of the hopper A source part swivel and a detection part swivel installed opposite to each other on a central axis, a radiation source part and a radiation detection part installed at each of the source part and the detection part swivel to emit radiation and detect the emitted radiation, and the radiation source part A control unit for generating a control signal and a drive control signal for the source part rotating table 200 and the detecting part rotating table 400, and a level meter unit for processing the detection signal of the radiation detector, and a radiation device in the level meter unit and the control unit. A computer that provides a control signal and processes and outputs and stores received raw material level information. It characterized in that it comprises.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

Figure 4 is a block diagram of the internal measurement of the hopper using the radiation of the present invention, Figure 5 is a plan view of the system of the present invention, Figure 6 is a perspective view showing the installation state of the radiation source of the present invention, Figure 7 is a view of the present invention 8 and 9 are cross-sectional structural views of the radiation source unit and the radiation detection unit, respectively.

As referred to herein, an annular rail 501 and a gear 502 are installed on the base 503 provided around the hopper 14.

The driving unit base 241 is provided with a source part supporter 240 for supporting the radioisotope radiated from the radiation source part 100 with sufficient intensity, and moves the radioisotope to a calibration position and a measurement position thereon. The calibration switching device 230 is installed to play a role. These are installed on the source rotating table 200.

The calibration switching device rotates the worm shaft 231 and the switching drive motor 232 for driving it, the rotation measurement switching encoder 233 for detecting the rotation state of the switching drive motor 232, the switching drive motor 232 It is attached to the source supporter 240 with a support band 235 and a bolt to fix.

The radioisotope 101 is installed on the upper part of the calibration switching device 230, and the raw material does not transmit the dose intensity of the radiation 102 to the front portion where the radiation 102 is emitted from the radioisotope 101. The plate 210 to attenuate the weak dose value of the intensity enough to penetrate and the plate case 211 containing the plate is installed, the opening and closing operation of the plate 210 by the plate driving motor 220 The opening and closing state of the plate encoder 221 is measured.

The devices are installed in the driving unit base 241 and the rotating motor 242 for driving the rotation, the rotation measuring encoder 243 for detecting the rotation state of the rotating motor 242, the fixed base for fixing the rotating motor 242 The driving gear 234 fixed to the driving unit base 241 and connected by the shaft 244 is installed to be engaged with the gear 502 installed in the base 503.

The cable 510 for transmitting a position control signal to the power supply and encoder 243 to the rotary motor 242 is installed together with a cable drum 511 to facilitate the movement of the cable.

The radiation detection unit 300 shown in detail in FIG. 7 is installed on the detection unit rotating table 400 rotating along the rail on the base.

The base 503 installed along the circumference of the hopper 14 is provided with a rail 501 and a gear 502 for driving in a circle thereon, and the drive base 402 has a sufficient strength for the detector 301. A detector support 401 is provided to support the rotary motor 403 for driving the drive unit base 402, a rotation measurement encoder 404 for detecting a rotation state of the rotary motor 403, and a rotation motor 403. The driving gear 410 is fixed to the driving unit base 402 by a fixed base 405 for fixing the shaft and is connected to the gear 502 installed in the base 503.

The cable 510 which transmits a position control signal to the power and encoder 404 to the rotating motor 403 is a command and measurement of the three-dimensional measurement system of the hopper using the cable drum 511 and the radiation to facilitate the movement of the cable A computer 601 that analyzes and stores the values, a control unit 620 that controls all of the control parts of the hopper's three-dimensional measurement system using radiation, and a level meter that measures the values of the detectors and sends them to the computer. It is installed together with the unit 630.

The operation of the present invention configured as described above will be described in detail with reference to the flowchart of FIGS. 15A, 15B, and 15C showing the measuring system of the present invention and the operation flow of the measuring system shown in FIGS.

First, in a general measurement state, the portion with the radiation source portion 100 is located at an angle of 0 degrees, and the portion with the radiation detection portion 300 is positioned at 180 degrees with respect to the radiation source portion 100, that is, at the opposite side. The computer 601 sends the drive control signals of the radiation source unit 100 and the radiation detection unit 300 to the control unit 620.

Accordingly, the control unit 620 sends a drive control signal to the rotary motor 242 installed in the drive unit base 241 and detects the changed position value using the encoder 243 and moves it to an angle of 0 degrees, and at the same time the control unit ( 620 outputs a drive control signal to the rotation motor 403 installed in the drive base 402, and moves the drive base 402 to a position of 180 degrees while detecting the changed position value using the encoder 404.

After completion of the movement, the control unit 620 sends the measurement position completion information to the computer 601, and the computer 601 sends a command to the control unit 620 to switch the calibration changer 230 to the measurement state as a next step. It becomes.

According to this control command, the control unit 620 issues a drive command to the switching drive motor 232 of the calibration switching device 230 and changes the switching drive motor until it receives a signal indicating that the switching encoder 233 has moved to the measurement position. After moving 232), when the movement is completed, the movement completion information is sent to the calibration switch measuring position to the computer 601.

When the position setting is completed, in order to measure the height of the raw material, the computer 601 issues a control command to close the plate to the control unit 620, and the control unit 620 that receives the command is a plate driving motor (installed on the plate 210). 220 is operated until the plate encoder 221 receives a signal that the plate is closed, and when the plate 210 is closed, the control unit 620 sends the plate 210 close completion information to the computer.

11 schematically illustrates a method of calculating the raw material height using radiation in the present invention, wherein the radiation "a" is a weak radiation amount attenuated by the plate, and thus "a1" shielded by the raw material cannot be transmitted. Only "a2" without raw materials is allowed to pass through. That is, "a" is the sum of "a1" which is shielded by the raw material and cannot be transmitted, and "a2" which does not exist and is transparent. At this time, the measurement of the raw material height using the dose value of "a2" is calculated | required by the following formula.

L = L1-(a2 × L1 / a)

Where L is an arbitrary raw material height, L1 is the lowest raw material height, L2 is the highest raw material height, a is the radiation dose value at the lowest raw material height, and a2 is the radiation dose value at any raw material height.

After the height of the raw material is measured as described above, the computer 601 commands the control unit 620 to open the plate 210 and sends the open completion signal to the computer 601 when the plate 210 is opened.

12A and 12B are explanatory diagrams of a raw material density calculation method according to the present invention, in which the radiation dose “b” in which the plate is completely open is transmitted even when the raw material is filled in the hopper.

Here, even if the raw materials in the two hoppers have the same raw material height, the radiation dose "b '" value is different by the difference because the density of the raw material through which radiation is transmitted is different as the position of "x, y, z" changes. Is obtained. This is shown in a graph as shown in FIG. 13, which is expressed as follows.

b '= b × e ^-μT

Where b 'is the transmitted radiation dose value, b is the radiation dose value before transmission, e is the natural log, μ is the absorption coefficient of the raw material, and T is the density of the raw material.

Through the density value of the raw material obtained by the above formula it is possible to distinguish between Figure 12a and Figure 12b and it is possible to know how the raw material accumulated in the shape.

The height and density values of the raw materials thus obtained are sent to the computer 601 for analysis and storage. After the processing of the result values, the computer 601 clocks the radiation source unit 100 and the radiation detection unit clockwise to the control unit 620. Send a command to move 300 by a certain angle (eg, 10 degrees).

The control unit 620 precisely and slowly drives the rotary motor 242 installed in the drive base 241 until it is measured that the angle of movement is 10 degrees on the encoder 243, and at the same time, the control unit 620 drives the drive base 402. The motor is rotated precisely and slowly until it is measured that the rotary motor 403 installed at the encoder has moved to an angle of 190 degrees from the encoder 404.

After the driving is completed, the control unit 620 transmits the angle 10 degree movement completion information to the computer 601, the computer 601 again measures the height and density of the raw material and analyzes and stores the result value.

This process is repeated until the whole angle is measured at 360 degrees and the entire hopper of 360 degrees is measured at each position. It is calculated and displayed on the monitor 602 in a three-dimensional graphic as shown in FIG. 14, and the measurement result value reduces errors through learning.

If the measured value is larger than the specified deviation value or if the user thinks that the calibration is necessary, it is automatically performed on the computer 601, or the user is in the mode icon 605 in the screen of the computer 601 monitor 601. You can manually perform a calibration by clicking on the icon.

When a command to start calibration is output from the computer 601 to the control unit 620, the control unit 620 moves the rotary motor 242 of the drive base 241 in which the radiation source unit 100 is located by an angle of 0 degrees from the encoder. Move until you reach.

At the same time, the rotary motor 403 of the driving unit base 402 having the radiation detection unit 300 is moved until the angle of 300 degrees is measured by the encoder 404. When the position movement is completed, the control unit 620 is a computer ( The computer 601, which has received the information of the calibration position completion, is sent to the control unit 620, and the control unit 620 sends the calibration position shift command and the shutter 210 open control command to the control unit 620.

The control unit 620 drives the rotary motors installed in the calibration switching device 230 and the plate 210 until the encoder recognizes the calibration position and the open position. When the drive is completed, the control unit 620 sends a message that the calibration wait is completed. The computer 601, which has sent and received the message, measures the radiation dose value and stores the data obtained therein as calibration data, compensating and calibrating by adding or subtracting it compared with the recently measured calibration data, and measuring the calibration data. When the signal exceeds the allowable range set in comparison with the prior art, a signal indicating that the detector is abnormal is displayed.

If there is no raw material inside the hopper, if the time exceeds the value set by the computer 401, the fireproof brick inspection operation is automatically performed, or if the user wants the firebrick inspection, the computer 601 monitor 602 screen is displayed. You can also perform the inspection manually by clicking on the icon labeled Inspection in the mode icon 605.

When the computer 601 sends a control command to the control unit 620 to start firebrick inspection, the control unit 620 issues a drive command to the rotating motor 242 installed in the drive base 241 and the changed position value is an encoder. Use (243) to detect and move to an angle of 0 degrees.

At the same time, the control unit 620 issues a drive command to the rotary motor 403 installed in the drive base 402 and moves the drive base 402 to a position of 180 degrees while detecting the changed position value using the encoder 404. .

When the movement is complete, the control unit 620 sends a message that the refractory brick measurement standby position completion computer 601. Then, the computer 601 checks whether the calibration switching device 230 is switched to the measurement state or the plate 210 is closed, and if both are satisfied, the fire brick inspection operation is performed.

If at least one of the calibration switching device 230 and the shutter 210 is not in the desired position, the computer sends a control command to the control unit 620 and moves it to a position where the firebrick can be inspected.

When the setting of the above conditions is completed, the computer 601 starts the firebrick inspection.

When measured once, the measurement for 10 seconds and the measured value is sent to the computer to analyze and store the refractory brick inspection data, and after processing the result value computer (601) to the control unit 620 clockwise radiation source unit (100) and the control command to move the radiation detection unit 300 by an angle of 10 degrees, and the control unit 620 is said to move the rotary motor 242 installed in the drive base 241 by an angle of 10 degrees from the encoder 243 Drive slowly and precisely until the measurement, and at the same time, the control unit 620 drives the rotary motor 403 installed in the drive unit base 402 slowly and precisely until it is measured that the angle of 190 degrees from the encoder 404 is completed. .

When the movement of the position is completed, the control unit 620 sends the angle 10 degree movement completion message to the computer 401.

Accordingly, the computer analyzes and stores the measured results and repeats the process until the entire measurement is made over 360 degrees. ) To find out the location and location of the broken bricks.

In addition, based on the inspection data measured in this way, the damaged area indication 604 is displayed on the monitor 602, and if the damaged state is large, a message indicating that the refractory brick repair is required is displayed on the monitor 602.

As described above, the present invention enables three-dimensional level measurement of the hopper using radiation, so that the amount of raw material in the hopper can be accurately measured, and the condition of the refractory brick inside the hopper can be accurately checked, thus preliminary inspection of equipment accidents. It has a preventable effect on it.

In addition, the present invention is able to stably control the raw material supply according to the accurate measurement of the amount of raw material in the hopper, and when the sample test is required through the calibration device, it is designed to enable simple sample testing from time to time to improve the diagnosis and measurement of the equipment condition. It brings effects that can be improved.

Claims (1)

The annular rail 501 and the gear 502 provided on the base 503 around the cylindrical hopper 14, and rotate along the rail and the gear by the driving of the motor and face each other on the horizontal center axis of the hopper The source part swivel 200 and the detection part swivel 400 to be installed, the source part swivel and the detection part swivel installed in the radiation source unit 100 and the radiation detection unit 300 for emitting radiation and detecting the emitted radiation And a control unit 620 for generating a control signal of the radiation source unit 100 and a driving control signal for the source unit rotating table 200 and the detecting unit rotating table 400 and the detection signal of the radiation detecting unit 300. And a computer 601 for providing a radiation device control signal to the level system unit and the control unit and processing and outputting and storing the received raw material level measurement information. Three-dimensional measuring system of hopper using radiation.

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