JPS5910348A - Monitoring device for inside of treating column - Google Patents

Abstract

PURPOSE:To eliminate the laboriousness in operation and to enable full automation, by monitoring remotely and automatically the sepn. plane of ion exchange resins. CONSTITUTION:A transparent body 3a of glass or the like is fitted into a monitoring window 3, and a detection part 9 for luminance is disposed so as to face to said body apart at a spacing from the body 3a. The part 9 is driven by a vertical movable means and is moved vertically along the window 3. A detection part 10 for position is fixed to the part 9, and moves vertically and integrally with the part 9. A scale plate 11 for position extends vertically along the window 3 apart from the part 10 at a spacing in front thereof, and when the part 9 moves vertically, the part 10 moves vertically along the plate 11. A formation part 14 for luminance code is connected to the part 9, and a formation part 15 for position code is connected to the part 10.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an in-processing tower monitoring device that monitors changes in the color of packing in a processing tower along the position within the tower. The present invention relates to a monitoring device suitable for monitoring the separation status of an ion exchange resin and an anion exchange resin.

As is well known, liquid treatment devices for obtaining pure water from wastewater using ion exchange resins are widely used. In this liquid processing device, as the processing operation progresses, part of the ion exchange resin reacts with cations, and the other part reacts with anions to remove these ions. When the reaction progresses to a certain extent, the ion exchange resin becomes nearly saturated with cations or anions, and a large amount of ions leak into the treated water, resulting in loss of treatment function.

Therefore, the ion exchange resin that has become nearly saturated must be regenerated by a regeneration operation, but the ion exchange resin that is saturated with each cation and anion must be regenerated with a regeneration treatment agent that corresponds to each ion. be. In other words, the cation exchange resin that has reacted with cations and has become nearly saturated is regenerated by sulfuric acid, etc., and the anion exchange resin that has become nearly saturated by reacting with anions is regenerated with caustic soda, etc. .

For such regeneration treatment, it is necessary to separate both resins in advance, so separation is carried out using the difference in specific gravity between the two resins and based on the difference in sedimentation speed.

In the resin regeneration tower for the above-mentioned separation operation, it is necessary to monitor the normality of the separation operation, and conventionally, visual monitoring was performed with the naked eye.

Generally, cation exchange resins and anion exchange resins have a color difference (for example, cation exchange resins are dark brown and ion exchange resins are yellowish brown), and this color difference is used for visual monitoring.

That is, a monitoring window extending in the vertical direction is provided on the side wall of the resin regeneration tower, and through the monitoring window, the anion exchange resin, which has a low specific gravity and a slow sedimentation rate and forms an upper layer due to backwash separation, is separated.
The progress of the separation process and the separation can be determined by visually monitoring the layered structure consisting of the cation exchange resin that forms the lower layer and the position of the separation surface of each layer based on the color difference, as it has a high specific gravity and a fast sedimentation rate. The purpose was to monitor the normality of the distribution of both resins when they were used.

Therefore, when visual monitoring work related to the separation operation of ion exchange resin is required, the operation must be temporarily interrupted and the operator must go back and forth between the operation panel and the regeneration tower installation location. There was a drawback that the operation could not be fully automated.

In addition, going back and forth between the control panel and the regeneration tower installation site is a cumbersome task, and furthermore, when the above-mentioned device is used in nuclear power facilities, there is the drawback that there is a risk of increased radiation exposure. Therefore, it was not favorable in terms of occupational safety and health.

The purpose of the present invention is to solve the problems of complete automation based on the above-mentioned prior art, and to solve the problem of complete automation based on the above-mentioned conventional technology, the object of the present invention is to obtain information from a brightness detection section that moves up and down along a monitoring window bored in the side wall of a processing tower, typically a resin regeneration tower. The above drawbacks are eliminated by automatically and remotely monitoring the separation surface position of two types of objects with different colors (brightness) inside the processing tower, typically ion exchange resins, based on the brightness signals generated by the process. However, it is an object of the present invention to provide an excellent in-processing tower monitoring device that eliminates the difficulties and enables complete automation of operation.

The configuration of the present invention in accordance with the above object is such that when automatically and remotely monitoring the separation status of an object to be monitored in a treatment tower, typically an ion exchange resin, a monitoring device extending vertically on the side wall of the treatment tower is provided. While moving the brightness detector up and down along the window, a brightness signal representing the brightness of the object to be monitored is generated at a number of monitoring positions on the monitoring window, and furthermore, the brightness signal representing the brightness of the object to be monitored at a number of monitoring positions is generated on the monitoring window, and the monitoring position through which the brightness detector is passing is detected. A position signal representing the position is generated by the position detection section, a series of luminance data based on both signals is readably stored in the luminance data storage section, and then the arithmetic processing section generates a series of luminance data read from the luminance data storage section. Both the brightness data and a series of standard brightness data read from the standard brightness data storage unit, that is, brightness data preset corresponding to the brightness of the monitored object near the separation surface position in the separation completion state. Based on the above-mentioned evaluation function, an evaluation value is calculated for determining the consistency between the luminance pattern of the series of luminance data and a reference luminance pattern represented by the series of reference luminance data, and The above evaluation value is calculated for each relative position while changing the relative positional relationship of the pattern corresponding to the brightness button, and based on a series of evaluation values, the consistency between the brightness button and the reference brightness pattern is determined. The gist of this invention is to calculate the best relative position of both patterns, further calculate the separation plane position based on the relative position, and display this on the display unit.

The structure and operation of the embodiment of the present invention will be described below with reference to FIGS. 1 to 6.

FIG. 1 is a block diagram showing the configuration of the above embodiment. A treatment tower 1 is filled with objects 2 to be monitored, typically a negative/positive ion exchange resin, and a monitoring window is provided on the side wall of the treatment tower 1. 3 extends in the vertical direction, a sluicing water jet pipe 4 is disposed at the bottom of the treatment tower 1, and a water guide pipe 5 extends from the limb pipe 4 and is connected to a discharge pipe of a sluicing water pump 6. , the water suction pipe 7 of the pump 6 is connected to a water source (not shown).

An air pipe B is connected to the top of the treatment tower 1, and air is forced into the tower 1.

A transparent body 3a such as glass is fitted into the monitoring window 3, and a brightness detection unit 9 is disposed opposite to the transparent body 3a with a gap in between.

The brightness detection unit 9 is driven by a lifting means (not shown),
It moves up and down along the monitoring window 3. A position detecting section 10 is fixed to the detecting section 9 and moves up and down together with the detecting section 9.

In front of the position detection unit 10, a position scale plate 11 extends vertically along the monitoring window 3 across a gap, so that when the brightness detection unit 9 moves up and down, the position detection unit 10 Position scale plate 1
It moves up and down along 1. The position scale plate 11 is made of, for example, a black body, and has horizontal stripes (scale lines) made of a reflector such as a metal coating so as to divide the vertical movement range of the brightness detection unit 9, that is, the length of the monitoring window 3 into 200 equal parts. is engraved. An upper limit detection section 12 and a lower limit detection section 13 are provided at the upper and lower ends of the scale plate 11, respectively.
will be placed.

A luminance code generation unit 14 is connected to the luminance detection unit 9, and a position code generation unit 15 is connected to the position detection unit 10.

The output terminals of the luminance code generation section 14 and the position code generation section 15 are respectively connected to the code assembly section 16.
The output terminal of is connected to the input terminal of a luminance data storage section 1T consisting of a RAM.

An address signal line 17a extending from the control unit 18 is provided as an address terminal and a control terminal of the luminance data storage head.

17b and control signal line 17c are connected to each other.

A data line extending from the position code generating section 15 and a clock oscillator 18a are connected to an input terminal of the control section 1B.

An address signal line 17d extending from the control section 18 is connected to an address terminal of the reference brightness data storage section 19 made of ROM.

An arithmetic processing section 20 is connected to the output terminals of the luminance data storage section 1T and the reference luminance data storage section 19.
The display unit 21 is connected to the output terminal of the display unit 21 .

Furthermore, the output terminals of the upper and lower limit detectors 12 and 13 are connected to the scan controller 22, code generator 15, and controller 1B, respectively, and a control signal line extends from the position code generator 15 to the luminance code generator 14. , are respectively connected to the control unit 1B.

A control signal line extends from the control section 18 to the scanning control section 22 and the arithmetic processing section 20.

In the above configuration, during the resin separation operation, the treatment tower 1 is filled with a mixture of ion exchange resins as the object to be monitored 2, and the sluicing water pump 6 is operated.
While spouting sluicing water upwards inside the tower from the sluicing water spouting pipe 4 at a specific flow rate, the monitored object 2 is
to precipitate.

When monitoring the separation status of the resin, the brightness detection unit 9 is moved by an appropriate elevating means, for example, JP-A-56-105
When lowered along the monitoring window 3 using a color difference detector driving means such as that disclosed in No. 760, the detection unit 9 detects the luminance corresponding to the color of the monitored object 2 at each position on the monitoring window 3. A brightness signal S1 representing the brightness is output. The brightness detection unit 9 irradiates the monitored object 2 with a light beam through the monitoring window 3, and passes the reflected light beam through a filter having a different transmittance depending on the wavelength, so as to correspond to the color of the monitored object 2. It converts into luminance and further converts it into an electric signal using a photoelectric exchange element to obtain a luminance signal Sl.
The color difference detector disclosed in No. 331 is used.

When the brightness detection section 9 descends, the position detection section 10 descends along the position scale plate 11, and outputs a position signal (pulse) S2 every time it passes a scale line on the scale plate 11, and then outputs a position signal (pulse) S2. , outputs a number of position signals S2 corresponding to the amount of movement. The position detecting section 10 is composed of, for example, a known reflective photocoupler.

Upon receiving the position signal S2, the position code generating section 15 including a reversible counter counts the signal and calculates the amount of movement of the brightness detecting section 9, that is, the brightness detecting section 9 represented by the distance from the top of the monitoring window 3.
The position code (corresponding to the position) S3 is output.

The position code S3 represents each monitoring position on the monitoring window 3, and each time the position code S3 changes, in other words, each time the position detection unit 10 passes a scale line, the brightness detection unit 9 A monitoring operation is performed.

Now, when the position detection section 10 passes the scale line, the position code generation section 15 counts the position signal S2, changes the position code S3, and sends a control signal S to the luminance code generation section 14.
In response to this, the luminance code generation section 14 samples and holds the luminance signal 81 supplied from the luminance detection section 9 at this time, converts it into a digital quantity,
It is output as a luminance code S5.

The code assembling unit 16 generates the changed position code S3 and brightness code S5.
are assembled into one luminance data S6 and supplied to the input terminal of the luminance data storage section 1T.

During this time, the control unit 18 receives the control signal S4, sends a write command signal S7 to the control terminal of the luminance data storage unit 1T through the control signal line 17c, shifts it to the write mode, and then sets the position code S3 to the address. The luminance data storage unit 17 is sent as a signal S8 through the address signal line 17b.
Transfer to the address terminal of.

Thus, a series of brightness data at the first monitoring point obtained regarding a large number of monitoring positions that the brightness detection unit 9 passes through while descending from the top (upper limit monitoring position) to the bottom (lower limit monitoring position) of the monitoring window 3. S6 is stored at an address corresponding to each monitoring position.

When the brightness detection section 9 descends to the lower limit monitoring position, the lower limit detection section 13 detects this and sends the lower limit signal S9 to the scanning control section 2.
2, the data is sent to each of the position code generation section 15 and the control section 1B.

When the two scan control sections receive the lower limit signal S9, they stop the lifting means (not shown) to stop the luminance detection section 9 from descending, and when the position code generation section 15 receives the signal S9, it stops the lowering means (not shown). , enter subtraction mode.

When the control unit 18 receives the lower limit signal S9, it starts timing a specific monitoring interval period ΔT using a built-in timer, and during this period, the brightness detection unit 9 remains at the lower limit monitoring position.

During that time, the control section 18 controls the luminance data storage section 1.
A read command signal S7 is sent to the control terminal of T to shift it to read mode 1, and then a control pulse 810 is sent to the arithmetic processing unit 20 in response to a high-speed clock pulse from the clock pulse oscillator 18a. Furthermore, in response to the response pulse Sll output in accordance with the progress of the arithmetic processing in the processing section 20, the built-in address counter is incremented at high speed to generate an address signal 88', which is used as an address signal. Luminance data storage unit 1T through signal line 17b
By supplying the data to the address terminal of , a series of luminance data S6 at the first monitoring time point stored in the storage unit 1T is read out sequentially in accordance with the progress of the arithmetic processing and transferred to the arithmetic processing unit 2G.

At this time, similarly, the control unit 18 receives the response pulse Sll' from the arithmetic processing unit 20, increments another address counter at high speed, generates an address signal 812, and transfers it to the address signal line. 17d to the address terminal of the reference brightness data storage section 19, a series of reference brightness data srs set uniquely to the device and stored in the storage section 19 is sequentially read out in accordance with the progress of arithmetic processing. The data is transferred to the arithmetic processing unit 20. During this time, the arithmetic processing unit 20 executes arithmetic processing to be described later.

Subsequently, when the monitoring interval period ΔT has elapsed, that is, when the second monitoring time point is detected, the control section 18 sends an activation signal 814 to the scanning control section 22, and the control section 22 receives the lower limit signal S.
9 and the activation signal 814, the operation of the lifting means not shown in 1 is reversed, and this time, the brightness detection unit 9 is set to the monitoring window 3.
rise along.

At this time, since the position code generating section 15 has already shifted to the subtraction mode, the position detecting section 1111
Each time the upper scale line is passed, a built-in reversible counter is incremented in a decreasing direction, thereby generating a position code S3 representing the monitoring position that the brightness detection unit 8 is passing through.

Thus, a series of brightness data S6 at the second monitoring point
is stored in the luminance data storage unit 1T in the same way as when descending, but when ascending, the control unit 18 responds to the lower limit signal S9 to generate the upper digit word address signal 815 as an area designation signal.
is supplied to the brightness data storage unit 11, so a series of brightness data during ascent is stored in a different storage area from that during descent, i.e.
A series of luminance data at a monitoring time point preceding the first monitoring time point is stored in such a way as to update the data in the stored area.

When the brightness detection part B rises and reaches the upper limit monitoring position,
The upper limit detection section 12 detects this and sends an upper limit signal 816 to each of the scan control section 22, position code generation section 15, and control section 1B.

"Receiving the 1st limit signal 8ta, the scan control unit 2
2 stops the elevating means, the position code generating section 15 shifts to the addition mode again, and furthermore, the control section 18 now outputs the series of luminance data S6 at the second monitoring point in accordance with the progress of the arithmetic processing. The data is transferred to the arithmetic processing unit 20.

When the brightness detection section 9 subsequently descends, a series of brightness data S6 at the third monitoring point is transferred to the arithmetic processing section 20, and the same operation is repeated thereafter.

Next, the operation of arithmetic processing in the arithmetic processing section 20 will be explained as follows.

In FIG. 2, the curved line is a graph representing the change in brightness along the monitoring position represented by a series of brightness data S6 generated at a specific monitoring point, and the horizontal axis is the brightness e(Nl
, the vertical axis indicates the monitoring position a (N).

In the illustrated example, any monitoring position among n monitoring positions a(1) to a(n) is 1.2.3...
・Using the brightness data number N that changes in the range of 11, a(
N), and its monitoring position a(Nl
The brightness at is expressed as e(Nl).

In FIG. 3, a curve B is a graph representing a change in luminance along a reference position, which is represented by a series of reference luminance data 81B stored in the reference luminance data storage unit 19;
The horizontal axis shows the brightness DtN), and the vertical axis shows the reference position b (N).

In the illustrated example, p reference positions b(1) to l) (p)
Any reference position among them is 1.2.3...
... is expressed as b (p) using a reference brightness data number P that changes within a range of p, and the reference brightness at the reference position b (P) is expressed as D (P).

Note that b (t) is the center position of the reference position b (p).

The reference brightness represented by the curve B represents the change in brightness of the monitored object 2 along the reference position in the vicinity of the separation plane position under a state in which the separation operation is completed.

A series of reference luminance data representing the luminance changes is specified uniquely to the apparatus including the monitored object based on the actual measurement results of the luminance changes, and is stored in the reference luminance data storage section 19 in advance.

FIG. 4 is a flowchart of arithmetic processing in the arithmetic processing section 20.

During arithmetic processing, the arithmetic processing unit 20 that has started (FIG. 4 a) first sets a large constant I+1 in register Q and 1 in register NUM as initial conditions (FIGS. 4 and 4 c). .

Here, register Q is a register for storing the minimum of the sum of absolute values of the difference between luminance and reference luminance,
Register NUM is a register for storing the relative position of the reference luminance pattern with respect to the luminance pattern, that is, the shift amount of the reference luminance pattern.

Subsequently, the processing unit 2θ specifies the brightness data number N as 1, reads out the brightness data representing the brightness C(1) at the monitoring position a(1) from the brightness data storage unit 1T, and further reads the reference brightness data. Specify the number P as 1 and set the reference position ifb (1
] is read out from the reference luminance data storage section 19 (FIG. 4d).

At this time, register 8UM is cleared at the same time (FIG. 4d).

Here, the register SUM is a register for storing the sum of the absolute values of the differences between the brightness and the reference brightness.

Subsequently, the processing unit 20 calls a subprogram (FIG. 4e) to calculate the absolute value of the difference between the brightness and the reference brightness,
Store this in register B (Fig. 4 e'), then add the contents of register B to the contents of register SUM, and update the contents of register SUM with the addition result (Fig. 4 e). , returns to the program (Fig. 4e).

After that, it is determined whether N is equal to the shift amount of the reference brightness pattern (Fig. 4 f), and until N reaches the shift amount, N is incremented (Fig. 4 g), and the brightness data is stored. The next address in the section 17 is designated and the next luminance data is read out.

At this time, the reference luminance data number P remains at 1, which represents the minimum reference position, so regarding the reference luminance data,
Only the extended reference brightness data representing the extended reference brightness D(1) is repeatedly used in an extended manner.

Hereafter, by repeatedly executing the same process, 1≦N
The sum of the absolute values of the differences between the luminance and the reference luminance D(1) in the range <NUM is calculated.

Such arithmetic processing (Fig. 4c-g) is performed by superimposing the curve B shown in Fig. 3 on the curve A shown in Fig. 2, and forming double-sided lines A and H.
The relative position of curve B on FIG. 2 is the upward shift amount,
That is, with respect to the portion occupied in FIG. 2 by the lower straight portion I31 specified by the NUM and whose end point position q+ is specified by the NUM, that is, the first calculation area L1, it is sandwiched between the double-sided lines A and H. This corresponds to the process of calculating the area of a portion.

However, at the stage of the above operation example, NUM=1, so
The end point position Q+ of the lower straight part Bl is the monitoring position a(1),
That is, since it corresponds to N=1, the lower straight portion 13. does not appear on FIG. 2 (after all, no calculation is performed in the first calculation area.

When the determination result in FIG. 4f is YES, the final luminance data number of the first calculation area, that is, the shift amount NUM, is temporarily stored in register E (FIG. 4h), and then, While incrementing both the brightness data number N and the reference brightness data number P (FIG. 4i), the brightness data storage unit I
From T, a series of luminance data following luminance data number N=NUM is sequentially read out, and from the reference luminance data storage section 19, a series of reference luminance data following luminance data number P=1 is sequentially read out. , in the same manner as described above, calls the subprogram (FIG. 4j), calculates the sum of the absolute values of the differences between the luminance and the reference luminance, and calculates the sum of the absolute values of the differences between the luminance and the reference luminance until P reaches the maximum reference position p, that is, the reference luminance data storage unit 19 to standard brightness o
By repeatedly performing the calculation for the above summation until reading out the final (pth) reference luminance data representing tp) (Fig. 4k), the luminance and reference luminance in the range NUM≦N<NUM10p are calculated. The sum of the absolute values of the differences is calculated.

Such arithmetic processing (FIG. 4 1-k) is shown in FIG.
Regarding the portion occupied in FIG. 2 by the intermediate curved portion B of the curve B in FIG. 3, which is superimposed while maintaining the relative positional relationship specified by This corresponds to the process of calculating the area of the sandwiched portion.

Subsequently, the processing unit 20 processes (
Figure 4 1), while incrementing N (Figure 4 1n)
, calls the subprogram and calculates the value of N corresponding to P=p, that is, the number following the luminance data number representing the monitoring position q3 corresponding to the end point position q2 of the intermediate curved portion B2 of the curve B in FIG. By repeatedly performing the same calculation as described above for the luminance data of NUM
The sum of the absolute values of the differences between the brightness and the reference brightness in the range +p≦N≦n is calculated.

At this time, the reference brightness data number P remains at p representing the maximum reference position, so regarding the reference brightness data,
Only the extended reference brightness data representing the extended reference brightness D (p) is repeatedly used in an extended manner.

This calculation process (FIG. 4 1-n) is performed with respect to the portion occupied in FIG. 2 by the upper straight line portion B3 of the curve B in FIG. 3 superimposed on FIG. 2, that is, the third calculation region L3. This corresponds to the process of calculating the area of the portion sandwiched between both lines A%B.

Continuing, if the judgment in Figure 4 1 is yes, this time NU
The sum S for the monitoring positions a(1) to a(n) of the absolute value of the difference between each luminance and each reference luminance constituting each point of the luminance button and the reference luminance pattern in the relative positional relationship specified by M.
The contents of register Q, which stores the total SUM calculated in the relative positional relationship specified by UM and the previous NUM (at the stage of the above operation example, NUM = 1, so register Q contains: 1n stored in the process shown in Figure 4 remains.).
If and only if is smaller than Q, then the contents of register Q are updated with a smaller SUM (FIG. 4p), and register Q stores the smallest SUM.

Subsequently, in the step of the fourth diagram, the value of N stored in the register E, that is, the upward shift of the reference luminance pattern)
The separation plane position is calculated by reading UM, adding the reference brightness data number t representing the center position b (tl) of the reference position b (p), and subtracting 1, and temporarily storing this in register G. memorize it (Fig. 4q).

Such arithmetic processing (Fig. 4q) is performed as shown in Fig. 3.
Since the separation plane position is specified as the reference position b (center position b(t) of Pl) corresponding to the central part of the intermediate curved part B2 of the curve B, as shown in FIG. 2, the lower straight part Bl of the curve B If the relative position of curve B with respect to curve A is specified by the value read as Nl, that is, the upward shift amount NUM, then the end point position q+ of This is based on the fact that the position of the separation plane can be identified from the central part.

Then, until NUM becomes (n-p)+1, that is, until the end point position 92' of the intermediate curved part B2 of the curve B in FIG. 2 reaches the monitoring position a (n) (FIG. 4 r) ,NUM
is incremented (S in FIG. 4), and the above series of arithmetic operations are repeatedly executed while shifting the curve B upward.

For example, when the arithmetic processing continues and NUM=No, the curve B occupies the relative position shown by curve B' in Figure 2, and the first calculation area is at L1' in the figure. Thus, the area Ql of the portion sandwiched between the lower straight portion Bl' of the curve B' representing the extended reference brightness D(1) and the curve A is calculated.

Similarly, in the second calculation region L2', the area Q2 of the part sandwiched between the curved part B2' of the curve B' and the curve A is calculated,
Furthermore, in the third calculation region L3', the extended reference luminance D (
The area Q3 of the portion sandwiched between the upper straight portion B3' of the curve H' representing pl and the curve A is calculated.

Then, the above calculation is performed as described above, 1≦N U M≦n
When executed within the shift amount range of −p + 1, the register Q stores the minimum sum of the absolute values of the differences between the luminance and the reference luminance for 1≦N≦n, that is, the value sandwiched between curves A and B. The smallest area among the areas of the parts is memorized, and
The register G stores the separation plane position defined by the curve B giving the minimum value, that is, the shift amount of the reference luminance pattern, so the arithmetic processing unit 20 stores the contents of the registers Q and G. is outputted to the display unit 21 (see t in Fig. 4).
) (Fig. 4 U).

In addition to the separation surface position, the minimum area given the separation surface position is visually displayed from the display section 21, so the operator can perform separation based on the minimum area. It is possible to estimate the clarity of the surface and, by extension, the degree of progress of the separation operation.

To be more specific, in general, the curve A representing the brightness pattern along the monitoring position changes depending on the progress of the separation operation (21), and the curve A illustrated in FIG. 2 indicates the separation completion state. It shows the brightness pattern under conditions close to .

The intermediate curved portion of the curved person matches well with that of the curve B under the final state of completion of separation.

The graphs in FIGS. 5 and 6 illustrate the brightness patterns at each stage of the separation operation until such a state is reached.

In the brightness pattern illustrated in FIG. 5, since the objects to be monitored are generally in a mixed state, the brightness changes slowly, and the minimum value of the area between the lines A and B is extremely small. It becomes a large value.

On the other hand, in the brightness batan illustrated in FIG. 6, the object to be monitored, which has a large specific gravity, continues to sink and accumulates at the bottom, so the change in brightness becomes somewhat steep at the bottom, resulting in curve A. , B decreases considerably.

In the configuration of the above embodiment, monitoring positions a(1) to a
(The entire area of NL is sandwiched between lines A and B (28
) Since the area of the curve A is calculated, the change in the upper and lower ends of the curve A also controls the area, and as illustrated in Figures 5 and 6, the brightness change represented by the curve A When the area changes as the separation operation progresses, the area also changes significantly accordingly, and there is a practical benefit that the area more sensitively reflects the progress of the separation operation.

Moreover, when forming the lower straight part B and the upper straight part B3 of the curve B necessary to secure the above-mentioned practical benefits, reference brightness data representing the reference brightness 'D(11) of the lower straight part B1 is used. By repeatedly using the reference brightness data representing the reference brightness D (p) of the upper straight portion B3 as extended reference brightness data as many times as desired, the straight line portion Bl
, B3 are formed in the arithmetic processing process, the reference luminance data storage section 19 stores the linear portions B1 . There is no need to store a series of reference brightness data representing Bs, and it is sufficient to store only a series of reference brightness data representing intermediate curved portion B2, which has the advantage of keeping the capacity of the storage section to a minimum. .

However, as described above, the configuration of calculating the area of the part sandwiched between both lines A and H over the entire monitoring position using the extended reference brightness data is not essential, and if necessary, it is necessary to use the extended reference brightness data. It is sufficient to calculate the relative positions of both lines A and B such that the curve B representing the brightness pattern and the curve A representing the brightness pattern match even partially.
Using only the intermediate curved portion B2, the area of the curve A corresponding to the curved portion B2, that is, only between the monitoring positions corresponding to the upper and lower ends of the curved portion B2 occupying the relative position specified by NUM. It may be configured to calculate.

Furthermore, in the configuration of the above embodiment, as an evaluation function for determining the consistency between the brightness pattern and the reference brightness pattern, the sum of the absolute values of the differences in brightness forming the pattern is calculated;
In other words, although the above evaluation function is not limited to this, it is sufficient to determine the consistency of both patterns, so we use the actually measured function based on the statistical maximum nine method. It is optional to employ various evaluation functions including a function for estimating a population of brightness data in which each brightness data forming a brightness bump appears with the highest probability.

As described above, when monitoring the separation plane position of an object to be monitored, the present invention can distinguish between a brightness pattern represented by a series of actually measured brightness data and a reference brightness pattern represented by a preset series of reference brightness data. With regard to matching, the present invention is configured to determine the relative positions of both patterns while shifting them, and calculate the separation plane position based on the relative position of both patterns that provides the best matching between both patterns. According to
With a simple configuration, the separation surface position of the object to be monitored can be automatically and remotely monitored, and there is no need to interrupt operation for monitoring, making it possible to fully automate the separation operation. It has excellent effects.

Furthermore, since there is no need for operators to go back and forth between the operation panel and the regeneration tower installation site for monitoring work, monitoring work is extremely easy, and not only can continuous monitoring be performed, but also in the case of nuclear equipment. However, it also has the advantage of not being exposed to the risk of radiation exposure.

[Brief explanation of the drawing]

The figures relate to an embodiment of the present invention; FIG. 1 is a block diagram showing its configuration, FIG. 2 is a graph showing a luminance button and a reference luminance pattern superimposed, and FIG. 3 is a graph showing a reference luminance pattern. , FIG. 4 is a flowchart of the arithmetic processing in the arithmetic processing unit 20, FIGS. 5 and 6 are graphs illustrating the relationship between the brightness button and the reference brightness pattern, and FIG. 5 shows the initial stage of the separation operation. Figure 6 shows it in the middle period. 1...Processing tower 2...Monitored object 3...Monitoring window 9...Brightness detection section 10...Position detection section 11. ...Position scale plate 14...Brightness code generation section 15...
...Position code generation unit 16...Code assembly unit
17...Brightness data storage unit 18...Control unit 1S...Standard brightness data storage unit 20.
... Arithmetic processing section 21 ... Display section 22
...Scan control unit patent applicant Ebara Corporation

Claims (2)

[Claims] (1) A monitoring window 3 extending vertically on the side wall of the treatment tower 1 and a plurality of monitoring positions that move up and down along the monitoring window 3 and are set at specific intervals in the vertical direction of the monitoring window 3. A brightness detection means 9 outputs a brightness signal representing the brightness of the monitored object 2; a position detection means 10 detects a monitoring position of the brightness detection means 9 on the monitoring window; and a position detection means 10 outputs a position signal representing the position; Based on the signal and the position signal (in a processing tower internal monitoring device having a brightness data storage means 17 that readably stores a series of brightness data), the brightness of the monitored object 2 near the separation surface position under the separation completion state is determined. A reference luminance data storage means 19 readably stores a series of reference luminance data representing a correspondingly preset reference luminance, and a series of luminance data read from the luminance data storage means 1T and the reference luminance data storage means 19. An arithmetic processing means 20 that determines the separation plane position of the object to be monitored 2 and outputs a separation plane position signal based on both of the read series of reference brightness data; The arithmetic processing means 20 is equipped with a separation plane position display means 21 for displaying the luminance "bump" represented by a series of luminance data regarding all or a part of the monitoring position at any monitoring time, and a series of reference luminance data. According to a specific evaluation function for determining the consistency of the reference brightness pattern represented by In the processing tower, the relative position of the brightness pattern and the reference brightness pattern is calculated based on the value, and the position of the separation plane is calculated based on the relative position. monitoring equipment. (2) The arithmetic processing means 20 generates a luminance button representing a series of luminance data regarding all monitoring positions at an arbitrary monitoring point, a series of reference luminance data, and the same reference as each of the data at both ends of the data. The method according to claim 1, characterized in that the relative position of a series of extended reference brightness data formed by extending the brightness data and the reference brightness pattern h represented by both patterns is calculated to achieve the best matching. Monitoring device inside the treatment tower.