JP2020085597A - Device, method, and system for monitoring in-board powder dust - Google Patents

Abstract

To provide an in-board powder dust monitoring device which can contribute to prevention of grounding faults by grasping environments in a control board in real time.SOLUTION: The in-board powder dust monitoring device includes: a dust sensor 2 serving as a first detection unit for detecting the amount of floating power dust which instantly enters a control board; a comb-like sensor 3 serving as a second detection unit for detecting the amount of deposited power dust in the control board; a first determination unit 15 for determining whether the amount of the flowing power dust has become larger than a threshold value; a second determination unit 16 for determining whether the amount of the deposited powder dust has become larger than the threshold value; and a display unit 20 for displaying the determination that one of the amount of the floating power dust and the amount of the deposited power dust has become larger than the threshold value.SELECTED DRAWING: Figure 1

Description

The present invention relates to an in-panel dust monitoring device and method for monitoring dust that enters and accumulates in a control panel, and an in-panel dust monitoring system.

The control panel includes, for example, a control panel installed remotely such as railroad and meteorological environment measurement, and a control panel installed in a factory with a lot of dust such as steel, cement, and a power plant. In these control panels, a large amount of dust that has entered instantaneously or a large amount of dust that has accumulated over time may cause poor electrical insulation in the control panel, which may eventually lead to a ground fault.

As a dust sensor for detecting such dust, there is a technique described in Patent Document 1, for example. This technology detects the amount of dust by irradiating light from a pulse-driven light source and detecting scattered light synchronized with the generated pulse with a light receiving element, and measuring the difference between the maximum value and the average value of the light receiving element output in a certain period. Is larger than a predetermined value and is identified as dust.

Japanese Patent No. 4470351

By the way, in the control panel, it detects the amount of dust that has invaded instantaneously or the amount of dust that has accumulated over time, and before the electrical insulation failure occurs in the control panel, the surrounding environment where the control panel is installed, or It is desired that the maintenance time of the fan filter installed on the control panel can be known in advance.

Therefore, it is an object of the present invention to provide an in-panel dust monitoring device and method, and an in-panel dust monitoring system that can contribute to preventive maintenance against a ground fault by grasping the environment in the control panel in real time. And

In order to achieve such an object, the invention according to claim 1 detects the amount of suspended dust that instantly enters the control panel, and the amount of accumulated dust accumulated in the control panel. A second detection unit, a first determination unit that determines whether the amount of floating dust detected by the first detection unit exceeds a preset threshold, and a second detection unit that detects the second dust detection unit. When a second determination unit that determines whether the accumulated dust amount exceeds a preset threshold value, or any one of the first determination unit and the second determination unit determines that the threshold value is exceeded. And a display unit for displaying that fact.

In addition, in the invention described in claim 2, in addition to the configuration described in claim 1, the display unit detects the amount of suspended dust detected by the first detection unit and the detection by the second detection unit. It is characterized by having a dust amount display unit for displaying the accumulated dust amount, and an alarm display unit for displaying an alarm when the above threshold values are exceeded.

Further, in the invention described in claim 3, in addition to the configuration described in claim 1 or 2, the first detection unit is a dust sensor, and the dust sensor is a count value of the suspended dust amount, It is characterized by detecting any of the suspended dust concentrations.

In addition, in the invention described in claim 4, in addition to the structure according to any one of claims 1 to 3, the second detection unit is a comb-shaped sensor, and the comb-shaped sensor includes an electrode. And a capacitance value that changes based on the amount of accumulated dust accumulated on the electrode portion is detected.

Further, the invention according to claim 5 is, in addition to the configuration according to claim 3 or 4, the time between the amount of the floating dust detected by the dust sensor and the amount of the accumulated dust detected by the comb sensor. It is characterized in that it further comprises a recording unit for recording the progress.

Further, the invention according to claim 6 is the first detection step of detecting the amount of floating dust that instantaneously enters the control panel, and the second detection step of detecting the amount of accumulated dust accumulated in the control panel. And a first determination step of determining whether or not the amount of floating dust detected in the first detection step exceeds a preset threshold value, and the amount of accumulated dust detected in the second detection step in advance. A second determination step of determining whether the set threshold value has been exceeded, and a display indicating that when either of the first determination step and the second determination step determines that the threshold value has been exceeded. And a process.

The invention according to claim 7 is any one of claims 1 to 5, which is installed in each of a plurality of control panels, and is provided with a transmission unit that transmits a signal indicating the amount of floating dust and the amount of accumulated dust. Centralized monitoring provided with an in-panel dust monitoring device according to claim 1, a receiving unit that receives a signal transmitted from each transmitting unit of the plurality of in-panel dust monitoring devices, and a display unit that displays the signal And a device.

According to the invention described in claim 1, the first determination unit determines whether the amount of floating dust detected by the first detection unit exceeds a preset threshold value, and the second detection unit detects it. The second determination unit determines whether the accumulated dust amount exceeds a preset threshold value, and the display unit displays when either the first determination unit or the second determination unit determines that the threshold value is exceeded. By displaying that fact, it is possible to contribute to preventive maintenance against a ground fault by grasping the environment inside the control panel in real time.

Further, according to the invention of claim 2, the display unit displays a dust amount that displays the amount of floating dust detected by the first detection unit and the amount of accumulated dust detected by the second detection unit. Since it has a unit and an alarm display unit that displays an alarm when each threshold is exceeded, the monitoring staff can surely grasp the environment inside the control panel in real time.

According to the invention of claim 3, the first detection unit is a dust sensor, and this dust sensor detects either the count value of the amount of suspended dust or the concentration of suspended dust. The amount of dust can be reliably detected.

Further, according to the invention described in claim 4, the second detection unit is a comb-shaped sensor, and the comb-shaped sensor has an electrode portion, and is based on the amount of accumulated dust accumulated on the electrode portion. Since the electrostatic capacitance value that changes with time is detected, it is possible to reliably detect the accumulated dust amount.

In addition, according to the invention described in claim 5, since a recording unit for recording the time course of the amount of suspended dust detected by the dust sensor and the amount of accumulated dust detected by the comb sensor is further provided, the suspended dust is It is possible to estimate the time course of the amount of dust and the amount of accumulated dust, and it is possible to determine in advance the cleaning time in the control panel.

According to the invention of claim 6, it is determined in the first determination step whether the amount of floating dust detected in the first detection step exceeds a preset threshold value, and the second detection step is performed. Displayed when it is judged in the second judgment step whether the amount of accumulated dust detected by the operator exceeds a preset threshold value, and in the first judgment step and the second judgment step that either exceeds each threshold value. By displaying that fact on the section, it is possible to contribute to preventive maintenance against a ground fault by grasping the environment inside the control panel in real time.

Further, according to the invention described in claim 7, the transmitter is installed in each of the plurality of control panels, and a transmitter for transmitting a signal indicating the amount of suspended dust and the amount of accumulated dust is provided. Concentrated with the in-panel dust monitoring device according to any one of claims, a receiving unit that receives a signal transmitted from each transmitting unit of these in-panel dust monitoring devices, and a display unit that displays this signal By providing a monitoring device, it is possible to prevent electrical insulation failure in a large number of monitoring panels by performing centralized monitoring in real time with this centralized monitoring device, and to prevent a ground fault. It can contribute to preventive maintenance.

It is a block diagram which shows the in-panel dust monitoring apparatus which concerns on one Embodiment of this invention. 3 is a flowchart showing the operation of the control device of FIG. 1. It is a block diagram which shows the in-panel dust monitoring system which concerns on one Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[One Embodiment of Dust Monitoring Device in Board]
1 and 2 show an embodiment of the in-panel dust monitoring device of the present invention. FIG. 1 is a block diagram showing an in-panel dust monitoring device according to an embodiment of the present invention. FIG. 2 is a flowchart showing the operation of the control device of FIG.

In addition, the in-panel dust monitoring device of the present embodiment is installed in a control panel remotely installed such as railroad and meteorological environment measurement, or in a factory with a large amount of dust such as steel, cement, and a power plant. Installed on the control panel.

As shown in FIG. 1, the in-panel dust monitoring device 1 of the present embodiment is installed in a control panel (not shown), and has a dust sensor 2 as a first detection unit and a comb-shaped sensor 3 as a second detection unit. And a control device 10, a display unit 20, and a setting operation unit 4.

The control device 10 includes input signal acquisition units 11 and 12, signal output units 13 and 14, a first determination unit 15, a second determination unit 16, and a PC (Personal Computer) communication unit as a recording unit. 17 is provided. The signal output unit 13 includes a signal output unit 13a and an alarm contact output unit 13b, and similarly, the signal output unit 14 includes a signal output unit 14a and an alarm contact output unit 14b. The display unit 20 includes a dust amount display unit 21 and an alarm display unit 22.

The dust sensor 2 is installed, for example, in the vicinity of the cooling air intake port of the control panel, and measures a minute amount of dust instantaneous value. Specifically, as the dust sensor 2, for example, a light scattering type dust sensor is used, and suspended dust is counted. This light-scattering type dust sensor takes in air (dust) into a flow path inside the sensor, and when the dust passes through the flow path, the light from the light source hits the dust and scatters the light. The scattered light is received by the light receiver, and this light is converted into a voltage, so that when the voltage value exceeds a certain threshold value, it is counted as dust.

That is, the dust sensor 2 integrates the measured dust counts in a unit time, and uses the integrated value as a measured value. For example, the number of counts in 10 seconds is the measured value.

The dust sensor 2 of the present embodiment may output the concentration of suspended dust (μg/m ³ ). When outputting the airborne dust concentration, use the measured concentration value as it is. As a criterion for this measurement value, the control device 10 outputs an alarm and the measurement value itself is output as an analog signal (for example, 4 to 20 mA).

The comb sensor 3 is installed, for example, at the bottom of the control panel and detects dust accumulated in the control panel. Specifically, the comb-shaped sensor 3 has an electrode portion (detection portion), and when dust is deposited on this electrode portion, the capacitance value of the electrode portion increases. Then, as the dust accumulation amount of the electrode portion increases, the electrostatic capacitance value rises. Therefore, by monitoring the electrostatic capacitance value, the change in the dust accumulation amount can be known.

The comb sensor 3 AD-converts the measured electrostatic capacitance value and takes it in as a measured value. In this case, a range (range) of capacitance values is set in advance, the percentage of the measured value taken in is calculated in that range, and in the same manner as the dust sensor 2 according to the percentage. Output.

The input signal capturing section 11 of the control device 10 captures a detection signal of the amount of suspended dust or the dust concentration detected by the dust sensor 2, while the input signal capturing section 12 collects the accumulated dust detected by the comb sensor 3. Capture the amount detection signal.

The analog signal output unit 13a of the signal output unit 13 outputs a signal indicating the amount of floating dust or the concentration of floating dust captured by the input signal capturing unit 11 as an analog signal. The analog signal output unit 14a of the signal output unit 14 outputs a signal indicating the amount of accumulated dust captured by the input signal capturing unit 12 as an analog signal.

The alarm contact output unit 13b of the signal output unit 13 outputs an alarm contact output of the amount of floating dust or the concentration of floating dust. The alarm contact output unit 14b of the signal output unit 14 outputs an alarm contact output of the accumulated dust amount.

The first determination unit 15 determines whether the amount of floating dust or the concentration of floating dust captured by the input signal capturing unit 11 exceeds a preset threshold value. The second determination unit 16 determines whether the amount of accumulated dust captured by the input signal capturing unit 12 exceeds a preset threshold value. The threshold values determined by the first determination unit 15 and the second determination unit 16 are set by the setting input unit 4 as described above. It is desirable that these threshold values are set to values that are significantly lower than the values that cause electrical insulation failure in the control panel.

The dust amount display unit 21 of the display unit 20 displays the amount of floating dust or the concentration of floating dust captured by the signal capturing unit 11 and the amount of accumulated dust captured by the signal capturing unit 12.

When the alarm display unit 22 of the display unit 20 determines that one of the first determination unit 15 and the second determination unit 16 exceeds the respective threshold value, it displays an alarm to that effect. Specifically, the alarm display unit 22 displays an image to that effect on a display unit such as a display, or lights up or blinks a display unit such as a lamp or an LED (Light Emitting Diode) to display an alarm about an abnormal state. Alternatively, a sound generator such as a horn, bell, or buzzer is sounded to give an alarm notification. Therefore, the warning display of the warning display unit 22 in the present embodiment includes an image display or a warning display.

The PC communication unit 17 records (logging) the time course of the amount of suspended dust detected by the dust sensor 2 or the concentration of suspended dust detected by the dust sensor 2 and the amount of accumulated dust detected by the comb sensor 3 using dedicated software. Since the control device 10 outputs an analog signal, logging is performed by connecting to a PC.

Next, the operation of the control device 10 in the present embodiment will be described based on FIG.

As shown in FIG. 2, first, in step S1, the input signal capturing unit 11 captures a detection signal of the amount of suspended dust or the concentration of suspended dust from the dust sensor 2. Then, the analog signal output unit 13 outputs the detection signal of the amount of floating dust or the concentration of floating dust captured by the input signal capturing unit 11 as an analog signal (step S2).

Further, in step S3, the input signal capturing section 12 captures a detection signal of the accumulated dust amount from the comb-shaped sensor 3. Then, the analog signal output unit 14 outputs the detection signal of the amount of accumulated dust captured by the input signal capturing unit 12 as an analog signal (step S4).

Next, the first determination unit 15 determines whether the amount of suspended dust or the concentration of suspended dust captured by the input signal capturing unit 11 exceeds a preset threshold value (step S5). When the amount of suspended dust or the concentration of suspended dust exceeds the threshold value (step S5: Yes), the process proceeds to step S6. In step S6, the alarm display unit 22 displays an alarm and the alarm contact output unit 13b outputs an alarm contact output of the amount of suspended dust or the concentration of suspended dust.

On the other hand, when the amount of suspended dust or the concentration of suspended dust does not exceed the threshold value (step S5: No), the process proceeds to step S7. In step S7, the second determination unit 16 determines whether the amount of accumulated dust captured by the input signal capturing unit 12 has exceeded a preset threshold value. When the accumulated dust amount exceeds the threshold value (step S7: Yes), the process proceeds to step S8. In step S8, the alarm display unit 22 displays an alarm, and the alarm contact output unit 14b outputs an alarm contact output of the accumulated dust amount. When the accumulated dust amount does not exceed the threshold value (step S7: No), the process returns to step S1.

Here, the sampling time for fetching the detection signal of the amount of floating dust or the concentration of floating dust from the dust sensor 2 is always fetched or set to an extremely short time since a minute dust instantaneous value is measured. The sampling time for fetching the detection signal of the dust accumulation amount from the comb-shaped sensor 3 is set to be longer than that of the dust sensor 2 because it takes a certain amount of time for the dust to accumulate.

As described above, according to the present embodiment, the first determination unit 15 determines whether the amount or concentration of suspended dust detected by the dust sensor 2 exceeds a preset threshold value, and the comb sensor 3 detects it. Displayed when the second determination unit 16 determines whether the accumulated dust amount exceeds a preset threshold value, and when either the first determination unit 15 or the second determination unit 16 determines that the threshold value is exceeded. By displaying that fact on the section 20, by grasping the environment inside the control panel in real time, it is possible to prevent electrical insulation failure and contribute to preventive maintenance against a ground fault. be able to.

Further, according to the present embodiment, the display unit 20 includes the dust amount display unit 21 that displays the dust amount detected by the dust sensor 2 and the comb sensor 3, and the alarm display unit that displays an alarm when the threshold values are exceeded. 22, the monitor member can surely grasp the environment inside the control panel in real time.

Furthermore, according to the present embodiment, the dust sensor 2 detects either the count value of the amount of suspended dust or the concentration of suspended dust, so that the amount of suspended dust can be reliably detected.

According to the present embodiment, the comb-shaped sensor 3 has the electrode portion and detects the capacitance value that changes based on the amount of dust accumulated on the electrode portion, so that the amount of accumulated dust can be reliably detected. be able to.

Further, according to the present embodiment, since the PC communication unit 17 for recording the time course of the amount of floating dust by the dust sensor 2 and the amount of accumulated dust by the comb sensor 3 is further provided, the amount of floating dust and the amount of accumulated dust are The passage of time can be estimated, and the time for cleaning the inside of the control panel can be determined in advance.

[One Embodiment of Dust Monitoring System in Board]
FIG. 3 is a block diagram showing an in-panel dust monitoring system according to an embodiment of the present invention. In the present embodiment, the same parts as those of the in-panel dust monitoring device of the one embodiment will be designated by the same reference numerals, and different configurations and operations will be described. Further, in FIG. 3, only the in-panel dust monitoring device 1a is shown as an internal configuration, but in the present embodiment, a large number of in-panel dust monitoring devices 1a,... 1n are installed and have the same internal configuration. It is assumed that

As shown in FIG. 3, a large number of in-panel dust monitoring devices 1a,... 1n are used for remote control panels such as railways and meteorological environment measurement, and dust such as steel, cement, and power plants. It is assumed that they are installed on the control panel installed in the factory where there are many cases.

The in-panel dust monitoring device 1a according to the present embodiment is provided with a transmission unit 25 that transmits a display signal of the display unit 20. Specifically, the transmission unit 25 transmits the dust amount display signal displayed on the dust amount display unit 21 and the alarm display signal displayed on the alarm display unit 22 to the centralized monitoring device 30.

The centralized monitoring device 30 includes a receiving unit 31, a dust amount display unit 32, and an alarm display unit 33. The reception unit 31 of the centralized monitoring device 30 receives the dust amount display signal and the alarm display signal transmitted from the transmission unit 25. The received dust amount display signal and the alarm display signal are displayed on the dust amount display unit 32 and the alarm display unit 33 of the centralized monitoring device 30, respectively.

As described above, in the present embodiment, the environment of the plurality of control panels installed at various locations is centrally monitored by the centralized monitoring device 30 in real time, so that electrical insulation failure is caused in each of the multiple monitoring panels. Can be prevented. As a result, a large number of monitoring panels can contribute to preventive maintenance against a ground fault.

It should be noted that each of the embodiments described above is described to facilitate understanding of the present invention, and is not described to limit the present invention.

For example, in each of the above-described embodiments, the dust sensor 2 detects the amount or concentration of suspended dust, and the comb sensor 3 detects the amount of accumulated dust. A meter may be installed, threshold values may be set for these temperature and humidity, and an alarm may be displayed even when the threshold values are exceeded. With this configuration, it is possible to further improve the monitoring accuracy.

Further, in each of the above-described embodiments, the setting operation unit 4 is connected to the dust sensor 2 and the comb sensor 3, and the dust sensor 2 and the comb sensor 3 are set with a threshold value or the like for outputting an alarm contact. However, not limited to this, the control device 10 may set all the ranges and thresholds.

1, 1a, 1n In-board dust monitoring device 2 Dust sensor (first detection unit)
3 Comb-type sensor 3 (second detector)
4 setting operation unit 10 control device 11 input signal capturing unit 12 input signal capturing unit 13 signal output unit 13a analog signal output unit 13b alarm contact output unit 14 signal output unit 14a analog signal output unit 14b alarm contact output unit 15 1st Determination unit 16 second determination unit 17 PC communication unit (recording unit)
20 display unit 21 dust amount display unit 22 alarm display unit 25 transmission unit 30 centralized monitoring device 31 receiving unit 32 dust amount display unit 33 alarm display unit

To achieve the foregoing object, the invention of claim 1 includes a first detection unit for detecting an instantaneous value of airborne dust amount intrusions in the control panel, the deposition quantity of dust deposited on the control panel A second detection unit for detecting the above, a first determination unit for determining whether the instantaneous value of the amount of suspended dust detected by the first detection unit exceeds a preset threshold value, and the second determination unit A second determination unit that determines whether the amount of accumulated dust detected by the detection unit exceeds a preset threshold value, and one of the first determination unit and the second determination unit sets each of the threshold values. When it is determined that it exceeds, it is determined whether or not the instantaneous value of the amount of floating dust exceeds the threshold value in the display unit that displays that fact, and the instantaneous value of the amount of floating dust exceeds the threshold value. If the instantaneous value of the suspended dust amount does not exceed the threshold value while displaying that effect on the display unit when it exceeds, the accumulated dust amount exceeds the threshold value by the second determination unit after that. A control device that determines whether the amount of accumulated dust exceeds the threshold value and controls the display unit to display that effect .

Further, in the invention described in claim 4, in addition to the configuration described in claim 3 , the second detection unit is a comb-shaped sensor, and the comb-shaped sensor has an electrode portion It is characterized in that a capacitance value that changes based on the amount of the accumulated dust accumulated on the portion is detected.

In addition to the configuration according to claim 4 , the invention according to claim 5 is the time course of the amount of the suspended dust detected by the dust sensor and the amount of accumulated dust detected by the comb sensor. It is characterized by further comprising a recording unit for recording.

The invention according to claim 6 is the first detection step of detecting the instantaneous value of the amount of floating dust that enters the control panel , and the second detection step of detecting the amount of accumulated dust that accumulates in the control panel. Step, a first determination step of determining whether the instantaneous value of the amount of suspended dust detected in the first detection step exceeds a preset threshold value, and the first determination step detected in the second detection step A second determination step of determining whether the amount of accumulated dust exceeds a preset threshold value, and when either of the first determination step and the second determination step determines that either exceeds the threshold value, In the display step of displaying a message , it is determined whether the amount of floating dust exceeds the threshold value in the first determination step, and if the instantaneous value of the amount of floating dust exceeds the threshold value, in the display step On the other hand, when the instantaneous value of the suspended dust amount does not exceed the threshold value, it is then determined in the second determination step whether the accumulated dust amount exceeds the threshold value, and the accumulated dust amount is And a control step of controlling the display step to display that fact when the threshold value is exceeded .

The control device 10 includes input signal acquisition units 11 and 12, signal output units 13 and 14, a first determination unit 15, a second determination unit 16, and a PC (Personal Computer) communication unit as a recording unit. 17 is provided. The signal output unit 13 includes an analog signal output unit 13a and an alarm contact output unit 13b, and similarly, the signal output unit 14 includes an analog signal output unit 14a and an alarm contact output unit 14b. The display unit 20 includes a dust amount display unit 21 and an alarm display unit 22.

The first determination unit 15 determines whether the amount of floating dust or the concentration of floating dust captured by the input signal capturing unit 11 exceeds a preset threshold value. The second determination unit 16 determines whether the amount of accumulated dust captured by the input signal capturing unit 12 exceeds a preset threshold value. The threshold values determined by the first determination unit 15 and the second determination unit 16 are set by the setting operation unit 4 as described above. It is desirable that these threshold values are set to values that are significantly lower than the values that cause electrical insulation failure in the control panel.

Claims (7)

A first detection unit for detecting the amount of suspended dust that instantly enters the control panel;
A second detector for detecting the amount of accumulated dust accumulated in the control panel;
A first determination unit that determines whether the amount of suspended dust detected by the first detection unit exceeds a preset threshold value;
A second determination unit that determines whether the amount of accumulated dust detected by the second detection unit exceeds a preset threshold value;
A display unit that displays that when either the first determination unit or the second determination unit determines that the threshold value has been exceeded,
An in-panel dust monitoring device comprising: The display unit is a dust amount display unit that displays the amount of floating dust detected by the first detection unit and the amount of accumulated dust detected by the second detection unit, and an alarm when the threshold values are exceeded. The in-panel dust monitoring device according to claim 1, further comprising an alarm display unit for displaying. The said 1st detection part is a dust sensor, This dust sensor detects either the count value of the said floating dust amount, or a floating dust concentration, The board|substrate of Claim 1 or 2 characterized by the above-mentioned. Internal dust monitoring device. The second detection unit is a comb-shaped sensor, and the comb-shaped sensor has an electrode unit, and detects a capacitance value that changes based on the amount of the accumulated dust accumulated on the electrode unit. The in-panel dust monitoring device according to any one of claims 1 to 3, wherein: 5. The recording unit according to claim 3, further comprising a recording unit that records a time course of the amount of the suspended dust detected by the dust sensor and the amount of the accumulated dust detected by the comb sensor. The in-panel dust monitoring device according to the item 1. A first detection step of detecting the amount of floating dust that instantly enters the control panel;
A second detection step of detecting the amount of accumulated dust accumulated in the control panel;
A first determination step of determining whether the amount of floating dust detected in the first detection step exceeds a preset threshold value;
A second determination step of determining whether the amount of accumulated dust detected in the second detection step exceeds a preset threshold value;
A display step for displaying that when either one of the first determination step and the second determination step has exceeded the threshold value,
A method for monitoring dust inside a panel, comprising: The in-panel dust monitoring device according to any one of claims 1 to 5, wherein the in-panel dust monitoring apparatus is installed in each of a plurality of control panels, and a transmission unit that transmits a signal indicating the amount of floating dust and the amount of accumulated dust is provided. ,
A centralized monitoring device provided with a display unit for receiving signals respectively transmitted from the respective transmitting units of the plurality of in-panel dust monitoring devices and displaying these signals,
An in-panel dust monitoring system characterized by comprising:

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