KR102559766B1 - Measurement system of oxygen concentration and water level in manhole for water and sewerage - Google Patents

Abstract

The embodiment relates to a system for measuring the oxygen concentration and water level inside a manhole for water supply and sewage, and more specifically, the oxygen concentration and water level inside the manhole for water supply and sewage are combined and measured using a multipurpose ultrasonic water level sensor.
Specifically, these systems are located inside manholes. In installing a device for measuring oxygen concentration, an oxygen sensor is added as a parallel circuit to the existing water level sensor without installing a separate oxygen concentration meter in consideration of efficiency and economy. That is, to this end, it is a method of providing a multipurpose ultrasonic water level gauge that measures the oxygen concentration and water level inside the manhole for water supply and sewage by merging. In addition, since an oxygen sensor is added to the water level gauge to change a single type converter circuit, the measurement is performed in connection therewith.
So, accordingly, one embodiment secures safety in terms of maintenance while maintaining the main function of manhole operation.
More specifically, the oxygen concentration and water level inside the manhole are measured at the same time to prevent the use of dual equipment by workers inside the water and sewerage, who previously use an oxygen meter and an ultrasonic water level meter, to increase work efficiency and economic feasibility.

Description

Measurement system of oxygen concentration and water level in manhole for water and sewerage}

The content disclosed herein relates to a system for measuring the oxygen concentration and water level inside a manhole for water supply and sewage, and more specifically, a system for measuring the oxygen concentration and water level inside a manhole for water supply and sewage by using a multipurpose ultrasonic water level sensor.

In general, a sewage treatment system consists of a manhole pumping station facility that sends inflow sewage to a treatment plant and a facility that treats the sewage. These facilities are operated and managed by operating and controlling pumps according to water level and flow rate.

In particular, in the case of a manhole pumping station, a water level gauge is installed in a manhole at a depth of 3 to 10 m underground, and the pump is operated according to the measured water level to control the flow rate. In this way, during maintenance work on various facilities in the manhole, suffocation accidents due to oxygen deficiency and harmful gases occur frequently because the space is narrow and airtight, and countermeasures against this are urgently needed.

Accordingly, workers working on the water supply and sewage pipes use an oxygen concentration meter and an ultrasonic water level gauge to check the internal condition when entering the manhole. In addition, if the oxygen concentration measured by sufficient ventilation is maintained at 18% or more, or if ventilation is impossible, asphyxiation accidents in the manhole occur frequently even though wearing a respirator and entering the manhole interior. More accurate internal monitoring and prompt external alarm device is required.

So, in order to solve this problem, if an oxygen concentration measuring device, which has not been installed in the prior art, is installed in the manhole, the oxygen concentration and alarm inside can be checked from the outside, and accidents can be prevented.

KR 10-2012-0141490 B1 KR 10-2019-1940224 B1

The disclosed content is to review the efficiency and economic feasibility of installing a device for measuring the oxygen concentration. By adding an oxygen sensor to the existing water level sensor as a parallel circuit without installing a separate oxygen concentration meter, the main function of manhole operation is maintained. It is intended to provide an oxygen concentration and water level measurement system inside a manhole for water and sewage that secures safety in terms of maintenance.

More specifically, the oxygen concentration and water level inside the manhole are measured at the same time, preventing the use of dual equipment by workers inside the water and sewerage systems, who previously use an oxygen meter and an ultrasonic water level meter, to increase work efficiency and economic feasibility.

Additionally, this problem is not limited to those mentioned above, but is to provide a multi-purpose ultrasonic water level gauge that can be used for other purposes by integrating and measuring the oxygen concentration and water level inside the manhole for water supply and sewage.

In addition, since the oxygen sensor was added to the water level gauge to change the converter circuit, it was improved in connection with this.

The oxygen concentration and water level measurement system inside the manhole for water and sewage according to the embodiment,

inside the manhole In installing a device for measuring oxygen concentration, an oxygen sensor is added as a parallel circuit to the existing water level sensor without installing a separate oxygen concentration meter in consideration of efficiency and economy. That is, to this end, it is a method of providing a multipurpose ultrasonic water level gauge that measures the oxygen concentration and water level inside the manhole for water supply and sewage by merging. In addition, since an oxygen sensor is added to the water level gauge to change a single type converter circuit, the measurement is performed in connection therewith.

According to the embodiments, according to the multipurpose ultrasonic level meter for combined measurement of oxygen concentration and water level inside a manhole for water supply and sewage disclosed in the present specification made as described above, the following effects can be obtained.

First, inside the manhole In installing a device for measuring oxygen concentration, safety is secured in terms of maintenance while maintaining the main function of manhole operation by adding an oxygen sensor as a parallel circuit to the existing water level sensor without installing a separate oxygen concentration meter in consideration of efficiency and economic feasibility. And also, in connection with this It has the effect of increasing the measurement accuracy of the water level gauge inside the manhole.

In addition, workers performing repair and installation work inside the water and sewer pipes use an oxygen concentration meter and an ultrasonic water level gauge to check the internal condition just before entering the manhole. In addition, the oxygen concentration measured by sufficient ventilation is maintained at 18% or more, or if ventilation is impossible, it is effective to have a more accurate internal monitoring and quick external alarm function for the existing work method in which suffocation accidents in the manhole frequently occur even though entering the inside of the manhole after wearing a respiratory protection device.

In addition, in order to prevent workers inside the manhole from suffocating, the oxygen concentration measurement and the water level measurement are performed at the same time to ensure the maximum safety of the workers inside the water supply and sewage system. In addition, there is an effect of providing efficiency and economic efficiency in the use of equipment for workers who previously needed dual equipment by separately using the oxygen meter and the ultrasonic level gauge.

In particular, since values related to oxygen concentration and water level are important information directly related to human accidents, it is possible to obtain measured values with reduced errors by adding a correction circuit to the oxygen sensor and ultrasonic water level sensor in order to grasp more precise measured values.

In addition, the external display unit and alarm unit of the multipurpose ultrasonic water level meter for combined measurement of oxygen concentration and water level inside the manhole for water supply and sewage observe the internal state of the manhole in real time even from the outside of the manhole.

In addition, the real-time measurement information measured by the sensor unit and the control module is stored in the control unit of the device itself, and even when not working, past records can be extracted through an external storage device to collect information about the working environment. In addition, it is to provide a multipurpose ultrasonic level meter capable of receiving an operator's settings through a button unit and displaying specific information in detail on a display unit or omitting some of it.

1 is a view for conceptually explaining a system for measuring oxygen concentration and water level inside a manhole for water supply and sewage according to an embodiment;
2 is a view showing an overall oxygen concentration and water level measurement system inside a manhole for water supply and sewage according to an embodiment;
3 is a block diagram showing the configuration of a converter unit applied to a system for measuring oxygen concentration and water level inside a manhole for water supply and sewage according to an embodiment;
4 is a view sequentially showing the operation of the oxygen concentration and water level measurement system inside the manhole for water supply and sewage according to an embodiment;
5 is a front view showing an overall configuration in which a multi-purpose ultrasonic water level gauge applied to a system for measuring oxygen concentration and water level inside a manhole for water supply and sewage according to an embodiment is mounted inside a manhole;

First, prior to the description, in constructing the water level measuring device, the water level is measured by transmitting ultrasonic waves in a frequency band that humans cannot hear, and calculating the time interval and speed between the transmitted ultrasonic waves and the received ultrasonic waves reflected in a medium (e.g., liquid such as water). And, moreover, it is possible to control ultrasonic sensors installed in multiple locations with one transducer.

Prior to the description, the term "defense function" described in this specification means preventing errors in water level measurement by minimizing interference in water level measurement by frequencies other than the reception frequency of ultrasonic waves required for actual water level measurement (in the embodiment, it means a frequency returned after colliding with an installation structure) in measuring the water level.

1 is a diagram for conceptually explaining a system for measuring oxygen concentration and water level inside a manhole for water supply and sewage according to an embodiment.

As shown in Figure 1, the system of one embodiment is inside the manhole In installing a device for measuring oxygen concentration, safety is secured in terms of maintenance while maintaining the main function of manhole operation by adding an oxygen sensor as a parallel circuit to the existing water level sensor without installing a separate oxygen concentration meter in consideration of efficiency and economic feasibility.

More specifically, the oxygen concentration and water level inside the manhole are measured at the same time to prevent the use of dual equipment by workers inside the water and sewerage, who previously use an oxygen meter and an ultrasonic water level meter, to increase work efficiency and economic feasibility.

To this end, the system according to an embodiment measures the oxygen concentration and water level inside the manhole for water supply and sewage by merging, and provides a multi-purpose ultrasonic water level gauge 100 with improved accuracy.

In addition, since the converter circuit 200 is changed by adding an oxygen sensor in the water level gauge, the PLC 300 is connected to this to effectively measure it.

In addition, through the external display and alarm unit of the multipurpose ultrasonic water level meter for combined measurement of oxygen concentration and water level inside the manhole for water and sewage, the inside state of the manhole is observed in real time from the outside of the manhole, and even if an accident occurs, respond quickly to prevent human accidents caused by suffocation inside the manhole.

Therefore, through this, in one embodiment, workers performing repair and installation work inside the water supply and sewage pipes check the internal state using an oxygen concentration meter and an ultrasonic water level gauge just before entering the inside of the manhole. In addition, the oxygen concentration measured by sufficient ventilation is maintained at 18% or more, or if ventilation is impossible, it is effective to have a more accurate internal monitoring and quick external alarm function for the existing work method in which suffocation accidents in the manhole frequently occur even though entering the inside of the manhole after wearing a respiratory protection device.

FIG. 2 is a view showing an overall oxygen concentration and water level measurement system inside a manhole for water supply and sewage according to an embodiment.

As shown in FIG. 2, the oxygen concentration and water level measurement system inside the manhole for water supply and sewage according to one embodiment is first installed inside the manhole connected to the sewer pipe as before, and monitors the state inside the manhole. It relates to a system for measuring the water level inside the manhole for water supply and sewage.

Specifically, the system according to one embodiment largely includes a sensor module 100, a converter unit 200, and a main control unit 300. In particular, since this sensor module 100 is configured in a multi-purpose ultrasonic water level gauge method of an embodiment, the oxygen concentration and water level inside the manhole for water supply and sewage are combined and measured, and accuracy is improved.

And also in this case, these sensors and converters are connected through RS-485 serial communication, connected to the control center through TCP/IP, and the ultrasonic level gauge and oxygen sensor are connected in parallel to transmit and receive sensing information.

The sensor module 100 is provided inside the manhole and collectively measures the oxygen concentration and water level inside the manhole for different purposes from a multi-purpose ultrasonic level gauge. In addition, in this case, the multi-purpose ultrasonic water level gauge includes a first ultrasonic water level sensor and a flange at the bottom, an optical oxygen sensor installed in parallel to face each other in the lateral direction at the top in conjunction with the first ultrasonic water level sensor, and a resistive or contact type level sensor (second water level sensor). In addition, in this case, the amount of oxygen inside the manhole is measured optically by an oxygen sensor, the water level inside the manhole is measured by an ultrasonic method by an ultrasonic water level sensor, and the level sensor transmits a contact signal according to a change in water level. The water level inside the manhole is measured.

The converter unit 200 is a single-type converter, which collectively removes noise from each signal for each use in the multipurpose ultrasonic level meter measured by the sensor module 100, converts it to digital, calculates and transmits the measured value, and the measured value for each use is interlocked with a contact signal to generate an alarm.

The main control unit 300 provides the measurement values for each use of the multipurpose ultrasonic water level meter transmitted by the converter unit 200 to an external registration management information processing device, receives different control signals according to the measurement results, and performs different alarm operations according to the control signals. In addition, an alarm is provided internally using a contact signal according to a change in the measured value for each purpose in the multipurpose ultrasonic level meter.

Meanwhile, in this case, the main control unit 300 is also as follows.

For example, the main control unit 300 includes a battery unit, a DC/DC unit, a button input unit, a first communication unit, a control module, a main control unit, an alarm on/off unit, an analog I/O control unit, an alarm unit, and a display unit.

Here, the battery unit provides power for measuring the oxygen concentration and water level inside the manhole. That is, power is supplied so that each device (ie, each unit, for example, the sensor module 100, etc.) is driven.

The DC/DC unit converts the power of the battery unit or external power into operation power of a sensor for each purpose of the multipurpose ultrasonic level gauge, for example, into 24V power.

The button input unit receives user setting information and setting change information for measuring the oxygen concentration and water level inside the manhole. For example, the user finds a record of stored past information or receives an input for changing system settings.

The first communication unit receives the measurement value for each purpose transmitted by the converter unit 200 and outputs it to the registration management information processing device. For example, various types of information are input and output using an internal transmission method such as RS232/485.

The control module detects whether the device of the multipurpose ultrasonic level gauge is opened or closed, whether voltage is applied or in a state of a battery unit, and an internal temperature failure, thereby detecting a normal operating state of the multipurpose ultrasonic level gauge, that is, whether or not there is a failure.

The main control unit provides the measurement values for each purpose transmitted by the converter unit 200 to an external registration management information processing device, receives different control signals according to the measurement results, and outputs different alarm signals and display information according to the control signals. In addition, an alarm signal and display information are output differently according to information of a normal operating state detected by the control module. In addition, the main control unit differently controls the opening and closing operation of the device door according to the control signal and the normal operating state. For example, such a main control unit transmits information to be displayed on the display unit when the amount of oxygen inside the manhole measured by the oxygen sensor exceeds a preset reference amount, and when it is less than the alarm unit, an alarm signal is generated so that an alarm sound is generated. On the other hand, when the water level inside the manhole measured by the ultrasonic water level sensor and the level sensor is less than a preset reference water level, the display unit transmits information to be displayed, and when it exceeds, the alarm unit sounds an alarm. An alarm signal is generated. In addition, when the internal temperature of the multipurpose ultrasonic water level meter measured by the temperature sensor is less than a preset reference value, information is displayed on the display unit, and an alarm signal is generated so that an alarm sound is generated in the alarm unit when it exceeds. In addition, an alarm signal is generated so that an alarm sound is generated in the alarm unit only when the opening of the manhole internal state measurement system is detected according to the opening signal of the control module detected by the opening and closing sensor. The alarm signal is generated so that an alarm sound is generated in the alarm unit only when the voltage of the battery unit measured by the voltage sensor is less than a preset reference voltage.

The alarm on/off unit outputs an alarm signal differently by using a contact signal according to a change in measured values (ie, an oxygen alarm value and a water level alarm value) for each purpose in the multipurpose ultrasonic level meter under the control of the main control unit. For example, when this alarm value is lower than a set value, an alarm signal is output.

The analog I/O control unit inputs/outputs signals related to opening and closing of the device door by the main control unit.

The alarm unit expresses and outputs an alarm sound through, for example, an alarm buzzer, according to the alarm signal output by the main control unit.

The display unit displays display information output by the main control unit. For example, the water level and oxygen concentration inside the manhole, the temperature inside the control module, the voltage of the battery unit, and opening/closing information of the multipurpose ultrasonic water level gauge are displayed.

Additionally, a device applied to this multi-purpose ultrasonic level gauge will be described in more detail.

First, such an ultrasonic water level gauge is composed of a transducer that installs a detector capable of transmitting and receiving ultrasonic signals at a location to measure the water level, controls the ultrasonic signal transmitted and received through the detector, and measures the water level using information transmitted and received.

After the detectors are installed in a plurality of positions, it is possible to control a plurality of detectors through a single transducer, and the detectors may be set to ultrasonic waves of the same frequency band or different frequency bands.

In addition, a control device applied to this method is, for example, as follows.

First, the controller, that is, the control operation unit measures the oxygen concentration and water level by filtering the received optical information and ultrasonic waves as light information and ultrasonic waves are transmitted and received.

In this case, the control operation unit generates ultrasonic waves by vibrating the vibrator electrically or mechanically, and transmits the generated ultrasonic waves to a frequency band setting unit that changes the generated ultrasonic waves to match the set frequency band of the detector.

The frequency band setting unit sets the frequency band according to the frequency band usable in the installed detector, for example, sets it to 10 to 50 kHz ultrasonic waves according to the measurement distance. For reference, the narrower the frequency band of ultrasonic waves, the longer distances can be measured. Then, the ultrasonic wave changed by the frequency band setting unit to match the frequency band set by the detector is transmitted to the ultrasonic transmitter, and the ultrasonic wave transmitted through the detector is reflected on the medium and transmitted to the control operation unit again through the level receiver). In this case, not only the ultrasonic wave reflected from the medium but also the ultrasonic wave reflected from the installed structure (for example, a working ladder, pipe, etc.) is received and transmitted to the control operation unit. Thus, the received ultrasonic wave is transmitted to the level converter, and at this time, the level converter measures the time difference and speed of the transmitted ultrasonic wave and the received ultrasonic wave, and outputs the signal as a signal proportional to the distance to measure the water level. Additionally, in this case, in order to measure the water level using only the received ultrasonic waves reflected on the medium among the received ultrasonic waves, the ultrasonic waves reflected from the structure are removed through the converter to minimize interference in the water level measurement.

3 is a block diagram showing the configuration of a converter unit applied to a system for measuring oxygen concentration and water level inside a manhole for water and sewage according to an embodiment.

As shown in FIG. 3, the converter unit according to one embodiment is additionally provided with a correction circuit for increasing the accuracy of the measured value measured by the sensor unit, so as to provide a multipurpose ultrasonic water level meter for measuring the oxygen concentration and water level inside the manhole for water supply and sewage.

To this end, the converter unit includes a finite impulse response (FIR) filter to use a digital filter in which noise is blocked by a low-pass filter.

For example, the converter unit is composed of a difference equation expressed by [Equation 1] for the FIR filter included in the digital filter.

[Equation 1]

(Where y [n] is the current output value of the FIR filter, M is the order of the FIR filter, b [k] is the coefficient value of the FIR filter, x [n] is the current input value of the FIR filter, and x [n-k] is the past input value of the FIR filter)

Additionally, when [Equation 1] expresses the structure of the FIR filter, a sample delay for x[n], which is a measurement value measured by the sensor unit and transmitted as a current input value of the FIR filter of the converter unit, is used. Specifically, according to an embodiment, a sample delay of an interval according to a PID (Proportiona Intergral Differential) function related to a characteristic difference between an oxygen sensor and a water level sensor is input, and a value is input. In addition, this PID function is a specific calculation formula that shows sample delay in the same range in each sensor through calculations such as convolution and logarithm that combine the characteristics of the oxygen sensor and the water level sensor. Therefore, when parallel measurement is performed according to an embodiment through this, since the sample delay is configured identically from this configuration, the measurement value is obtained effectively.

Therefore, through this, the total value of the coefficient value of the FIR filter up to the highest order term is added to the difference equation that comes out as the output value of the FIR filter. Therefore, it is characterized in that the measured value corrected through the digital filter is transmitted to the control unit.

When the measured value corrected by the FIR filter is within a preset reference range, the converter unit recognizes the measured value as a normal measured value of the FIR filter and transmits the measured value to the control unit. On the other hand, if the measured value corrected by the FIR filter exceeds a preset reference range, it is recognized as an abnormal measured value of the FIR filter, and the abnormal measured value is deleted and then remeasured by the sensor unit to obtain a normal measured value from the filter unit.

4 is a diagram sequentially illustrating the operation of a system for measuring oxygen concentration and water level inside a manhole for water supply and sewage according to an embodiment.

As shown in FIG. 4, the system according to one embodiment is first installed inside a manhole connected to a sewage pipe as before, and measures the water level inside the manhole for water supply and sewage by monitoring the state inside the manhole.

In this state, one embodiment first installs the sensor module as described above. According to one embodiment, the sensor module is provided inside the manhole to collectively measure the oxygen concentration and water level inside the manhole for different purposes from a multipurpose ultrasonic water level gauge.

In this case, the multi-purpose ultrasonic water level gauge consists of a first ultrasonic water level sensor and a flange at the bottom, an optical oxygen sensor and a contact type level sensor (second water level sensor) installed in parallel to face each other in the lateral direction on the upper part in conjunction with the first ultrasonic water level sensor. These contents utilize the feature that the optical type and the contact type are installed in parallel on the side, and can be used for both purposes in conjunction with the main detection below.

Next, the converter unit collectively removes noise for each signal for each use in the multipurpose ultrasonic level meter measured by the sensor module, converts the noise into digital, calculates the measured value, and transmits the measured value. In addition, in this case, the measured value for each purpose is interlocked with the contact signal to generate an alarm.

Then, the main control unit provides the measurement value for each use of the multipurpose ultrasonic level meter transmitted by the converter unit to the external registration management information processing device, receives a different control signal according to the measurement result, and performs an alarm operation differently according to the control signal.

For example, when the control signal is out of a set reference value, an alarm is sounded through an alarm unit to inform the operator quickly.

In addition, an alarm is also provided internally using a contact signal according to a change in the measured value for each purpose in the multipurpose ultrasonic water level meter. That is, for example, when the set value is exceeded according to the change in the value for measuring the water level, a corresponding contact signal is used to determine whether or not there is danger, and an alarm is sounded through the alarm unit.

As described above, one embodiment is inside the manhole In installing a device for measuring oxygen concentration, an oxygen sensor is added as a parallel circuit to the existing water level sensor without installing a separate oxygen concentration meter in consideration of efficiency and economy. That is, to this end, it is a method of providing a multipurpose ultrasonic water level gauge that measures the oxygen concentration and water level inside the manhole for water supply and sewage by merging. In addition, since an oxygen sensor is added to the water level gauge to change a single type converter circuit, the measurement is performed in connection therewith.

So, accordingly, one embodiment secures safety in terms of maintenance while maintaining the main function of manhole operation.

More specifically, the oxygen concentration and water level inside the manhole are measured at the same time to prevent the use of dual equipment by workers inside the water and sewerage, who previously use an oxygen meter and an ultrasonic water level meter, to increase work efficiency and economic feasibility.

5 is a view for explaining an installation method of an oxygen concentration and water level measuring system inside a manhole for water supply and sewage according to an embodiment.

As shown in FIG. 5 , in the installation method according to an embodiment, when the space is narrow or the structure is installed in a place where there are many installed structures, transmitted ultrasonic waves may be reflected on the medium as well as the installed structure and received through the detector.

The received ultrasonic wave may be an ultrasonic wave that is reflected from an actual medium and an ultrasonic wave that is reflected from an installed structure.

Additionally, this measurement method is as follows.

First, after confirming the set frequency band of the installed detector, the ultrasonic wave is changed to the set frequency band of the detector by the frequency band setting unit.

At this time, the frequency band set in the detector is set according to the water level measurement distance, and is changed to a 50 kHz band for short-distance measurement (within 2 m), a 40 kHz band for medium-distance measurement (within 5 m), and a 20 kHz band for long-distance measurement (within 10 m) and transmitted to the detector.

The detector transmits ultrasonic waves changed to a set frequency band through an ultrasonic transmitter, and the transmitted ultrasonic waves transmit ultrasonic waves at a location where the water level is to be measured.

Ultrasonic waves transmitted from the detector collide with the medium and are reflected back, and the received ultrasonic waves are transmitted to the controller. Then, the control unit calculates the distance value using the difference between the transmission time of the transmitted ultrasonic wave and the reception time difference and speed when the ultrasonic wave hits the medium and returns, and measures the water level by the calculated distance value.

At this time, among the received frequencies, the frequency reflected by hitting the actual medium and the frequency reflected by hitting the installed structure are filtered and distinguished, and then the frequency reflected by hitting the structure is excluded from the water level measurement through the masking function. By calculating the water level, the accuracy of the water level measurement is increased.

So, after measuring the water level by the time difference and speed of the transmitted and received ultrasonic waves, if the measured water level is out of the preset water level range, a separate control signal is transmitted to operate the pump to introduce or discharge water to adjust the water level to the set range.

On the other hand, this configuration also enables efficient management by converting the information differently according to situations such as actual configuration format for each sensor device when converting each sensor information in this way.

To this end, the converter unit operates as follows, for example.

a) First, when sensor information is converted in this way, an information conversion operation is differently controlled for each number of current sensor devices.

b) Then, in the case of controlling the information conversion operation, a map table for converting a mapping relationship between a request command value and a set reference output operation value for each measured value of a plurality of different sensor devices or voltage levels is registered in advance.

Therefore, since the information conversion operation is differently corrected and controlled according to the voltage level currently stored by the map table, it is driven according to different voltages.

c) Additionally, in this case, the map table includes information for converting a mapping relationship between a request command value and a set reference output operation value for each of a plurality of different numbers of sensor devices and sensor device types.

On the other hand, in addition to this, when converting information in this way, these devices perform the conversion according to each sensor device, so that the conversion is performed quickly and smoothly according to various methods and situations.

To this end, the map table operates as follows.

a) First of all, as described above, in the case of differently controlling the information conversion operation, each of the I/O port configurations is matrixed for each of a plurality of different sensor devices from the set I/O port format below.

Also, any one or more ports among these I/O ports are diversified for each type of sensor device.

In addition, the I/O port format differently combines and matches matrix type I/O ports for each of a plurality of different sensor devices.

b) Accordingly, whenever the information conversion operation is differently controlled, conversion is performed according to each sensor device by matrix diversification of the conversion operation for each sensor device or for each type from the I/O port format.

On the other hand, this configuration collects the measured values and provides them to the management information processing device to monitor remotely, by safely providing information from the following configuration in a cryptographic manner so that the administrator can smoothly diagnose the failure.

First, remote diagnosis (particularly, failure diagnosis) is as follows.

In the case of this monitoring service, replacement diagnosis is performed on the multi-purpose ultrasonic water level gauge, so the target is appropriately replaced and continuously and stably operated.

To this end, the management information processing device also performs the following operations.

First, the management information processing device compares the standard driving amount characteristic information of the multipurpose ultrasonic level gauge and the current driving amount characteristic information for each device type from a diagnosis model when state information is transmitted for each sensor in the multipurpose ultrasonic level gauge.

As a result of the comparison, when the difference value between the reference driving amount characteristic information and the current driving amount characteristic information corresponds to a preset reference difference value, it is diagnosed as normal.

On the other hand, as a result of the comparison, when the difference value between the reference driving amount characteristic information and the current driving amount characteristic information does not correspond to the reference difference value, replacement is diagnosed, so that the object is smoothly maintained.

And, in this case, the replacement method is performed as follows.

a) First of all, the replacement method defines a method of classifying and learning driving amount based on required time and state information for each of a plurality of different devices and surrounding situations in case of replacement diagnosis of an object.

b) At this time, the learning method is as follows.

1) A driving amount data set is extracted based on a data set representing a plurality of different devices, operation of a driving device for each surrounding situation, and characteristics of a surrounding situation state.

2) Next, the driving amount data set extracted in this way is attributed by reflecting a plurality of different places and surrounding situation information.

3) Then, on the basis of the result attributed in this way, driving amount characteristics maintaining the same driving amount for a period representing a persistence characteristic (or identification) for each method are determined.

4) Also normalize these results.

5) Therefore, based on these results, driving amount characteristic information is set for each method, and independent (standard driving amount characteristic information) and dependent (drive amount) variables that create information predicting the driving amount for each of a number of different devices and surrounding situations.

6) Then, the set results are generated as learning and training data.

7) So, through this, a replacement method is constructed and provided from the result generated in this way.

Next, in this state, specifically, information from the following configuration is safely provided in a cryptographic manner, so that the manager side smoothly diagnoses the failure.

That is, in this configuration, when information is provided first, n pieces of distributed information (the number of measured values or the number of managers) are generated by using the corresponding secret key and exclusive OR characteristics for each number of measured values or the number of managers. For example, the manager side is also a management information processing device (remote ground), a manager terminal, and a management information processing device at the work site. For reference, the measured value is each sensed information. On the other hand, by using this information, n partial secret keys are generated, and encrypted distributed data and partial secret keys are stored in each of the n numbers, thereby encrypting. In this case, the distributed data is also divided by measurement value or manager side.

Briefly explaining this background, as terminals become high-performance/high-capacity, the importance of protecting and managing important data inside the terminal is emerging.

In order to protect and manage such important data, a method of encrypting important data of a terminal and storing them in an external storage device for backup has been conventionally used.

However, when important data is stored in one external storage device, a problem in which important data is easily leaked may occur if the storage device is hacked.

Therefore, in storing important data in an external storage device, a more secure method is required.

On the one hand, in particular, and also, in this case, the method of inputting an arbitrary initial value and secret key is blocked by using scrambling, thereby performing data distribution and storage more effectively.

To this end, first, in the case of encryption in this way, information is encrypted from the following encryption configuration and provided respectively.

In addition, the encryption configuration is as follows.

a) In other words, when receiving information to be monitored, one different secret key is selected according to the shape or length of the plain text based on the AES encryption method.

In addition, cipher text is obtained by repeatedly executing one of a plurality of different rounds selected according to the size of the secret key.

In addition, the function for each round applies ARIA (Academy Research Institute Agency) encryption format including round key addition, permutation layer, and spreading layer.

b) Therefore, before performing the round key addition operation through this, modulation is performed by first performing an exclusive OR with n-1 scramblers (n is each number) from the plaintext and the secret key.

c) Then, set this modulation information into n partial secret keys, and provide one different partial secret key to each of the n objects.

d) Therefore, when the modulation is performed in this way, the cipher text is obtained by repeatedly executing a round-by-round function including round key addition operation of one round according to the size of the secret key.

In addition, whenever the ciphertext (format) is obtained, the scrambler systematically disappears in the round key addition operation, and the operation result is obtained in the same format as the commercial Advanced Encryption Standard (AES).

On the other hand, in addition to this point, in the case of encryption in this way, the distributed storage method of data uses the prior art as another example to distribute data from the following configuration, so that effective distributed storage can be performed on the other hand.

For example, in this configuration, n-1 scrambles are first made, that is, a secret key is formed by subtracting one from the number of targets, and n pieces of distributed data are generated using the secret key.

More specifically, by selecting a t-1 order random polynomial (f(x)) having a constant term as secret data, and substituting values from 1 to n to x of the t-1 order random polynomial (f(x)), n pieces of distributed information can be generated. In this case, t represents the number of distributed data required to recover secret data.

Then, a specific secret key is constructed.

Next, n-1 random keys, that is, n-1 scrambles are generated, and both the secret key and the n-1 random keys are bitwise XORed.

Then, this information can be set as n partial secret keys, and one different partial secret key can be transmitted to each of the n objects.

Then, each of the n pieces of distributed data is encrypted with a secret key to generate n pieces of encrypted distributed information.

Then, each of the n pieces of encrypted distributed data is transmitted to corresponding n objects and stored. For reference, this method is also used in the same way as the above method.

Therefore, prior to transmitting the encrypted distributed data, a process of authenticating whether n objects are legitimate users may be performed.

On the other hand, for reference, if this method is encrypted in this way, the process of restoring the distributed and stored data will be described here.

First, when receiving a request for recovery of secret data, encrypted distributed data is received from at least t storages among n objects. In this case, prior to receiving encrypted distributed data, an authentication process with t objects may be performed.

And construct the secret key

For example, if a secret key is stored inside, this secret key is used, otherwise, a secret key is constructed separately. And in this case, if the secret key cannot be constructed internally, the secret key can be obtained through n objects.

Acquisition of the secret key through the n objects may include authenticating with each of the n objects, receiving a partial secret key from the n objects, and bitwise XORing all of the received n partial secret keys to generate a secret key. This method is additionally used together with the two methods described above.

Then, t pieces of distributed data are generated by decrypting t pieces of encrypted distributed data with a secret key.

And also, secret data is recovered using t pieces of distributed data.

To explain the secret data recovery process in more detail, a t-1 order random polynomial (f(x)) is recovered using t pieces of distributed data, a constant term of the t-1 order random polynomial (f(x)) is confirmed, and the constant term can be recovered as secret data.

On the other hand, in addition, in this case, this configuration keeps the information consistent from the following operation, so that information is quickly transferred and change management is smooth.

a) To this end, first of all, in this configuration, the main control unit and the device registration information and a table storing real information including state information for each different use are identically provided with each other, and a matching relationship for the table is preset and registered.

b) Next, in this state, when information in the tables is mutually changed, the tables are each synchronized according to the matching relationship.

c) Then, when synchronizing the table, the database is matched by diversifying information for each type of information for each use by a plurality of different types of measurement devices.

In addition, in this case, the multipurpose ultrasonic level gauge performs the following operations in parallel in connection with the above operations, so that information is delivered more quickly and changes and other matters are more widely managed.

d) For example, in this configuration, first, the corresponding interface unit has an output port table therein, and the output port table diversifies and inputs and outputs corresponding information for each facility, device type, and information type in the same way as the table.

e) Then, when transmitting such information, the information is diversified from the output port table and transmitted to the batch main control unit to perform notification.

f) In addition, when information is transmitted, when information in the table is changed in conjunction with the table, information on the output port table is also synchronized and changed, and the matching relationship is also provided with the matching relationship with the output port table to operate in combination with each other.

Meanwhile, in this case, the main control unit also uses this method to facilitate management such as keeping information consistent between the management information processing device and the manager terminal.

To this end, the main control unit uses the same method as above and is as follows.

a) That is, the main control unit first has a plurality of different external and on-site management information processing devices or manager terminals and a table storing device registration information and actual information mutually identical to each other, and sets and registers matching relationships with the tables in advance.

b) Next, in this state, when information in the tables is mutually changed, the tables are each synchronized according to the matching relationship.

c) Then, when synchronizing the table, the database is matched by diversifying information for each type of information for each use by a plurality of different types of measurement devices.

In addition, in this case, the main control unit performs the following operations in parallel in connection with the above operations, so as to deliver information more rapidly and manage matters such as changes more broadly.

d) For example, in this configuration, first, the corresponding interface unit has an output port table therein, and the output port table diversifies and inputs and outputs corresponding information for each facility, device type, and information type in the same way as the table.

f) Then, when transmitting such information, the information is diversified from the output port table and transmitted to the batch management information processing device or the manager terminal, respectively, to perform notification.

e) In addition, when information is transmitted, when information in the table is changed in conjunction with the table, information on the output port table is also synchronized and changed, and the matching relationship is also provided with the matching relationship for the output port table to operate in combination with each other.

100: sensor module
200: converter unit
300: main control unit

Claims (3)

In the system installed inside the manhole connected to the sewer pipe to measure and monitor the water level in the manhole,
The system
A multipurpose ultrasonic water level gauge composed of a sensor module for collectively measuring the water level and oxygen concentration of the manhole;
a single-type converter unit that converts the sensing values of the water level and oxygen concentration measured by the multipurpose ultrasonic water level gauge into digital batches;
a main control unit that differently controls an alarm operation according to the digital value converted by the single type converter unit; and
a management information processing device for monitoring water level and oxygen concentration information of a manhole from a remote location according to the control information of the main control unit; including,

The sensor module
Ultrasonic water level sensor for detecting the main water level of the manhole installed on the bottom; and
A contact type water level sensor and an optical oxygen sensor installed in parallel to face the upper side in conjunction with the main water level detection of the ultrasonic type water level sensor to collectively detect the sub level and oxygen concentration of the manhole; Including,
The main control unit is
1) Through the single converter unit, the contact type water level sensor and the optical oxygen sensor are connected as a whole to each other through the contact point opposite to each other,
2) generating a sub-level alarm signal and an oxygen concentration alarm signal using a contact signal according to a change in the sub-level measurement value of the contact-type water level sensor and the oxygen concentration measurement value of the optical oxygen sensor;
The management information processing device
a first process of receiving, by the main control unit, state information for each of the ultrasonic water level sensor, the contact water level sensor, and the optical water level sensor in the sensor module of the multipurpose ultrasonic water level gauge;
a second process of comparing standard drive amount characteristic information and current drive amount characteristic information for each sensor of a multipurpose ultrasonic water level meter for each sensor device type from a set diagnostic model according to each state information received; and
a third process of diagnosing as normal when the difference value between the reference driving amount characteristic information and the current driving amount characteristic information as a result of the comparison corresponds to a preset reference difference value, and diagnosing as replacement when not corresponding; including,
In the second process, the set diagnosis model is
In the case of replacement diagnosis, a 2-1 process of defining a method of classifying and learning a driving amount based on required time and state information for each of a plurality of different sensor devices and surrounding situations;
a 2-2 process of extracting a driving amount data set based on a data set representing a driving operation for each of a plurality of different sensor devices and surrounding conditions, and a driving amount data set;
a 2-3 step of attributing the extracted driving amount data set by reflecting a plurality of different installation locations and surrounding situation information;
a 2-4 step of determining a driving amount characteristic maintaining the same driving amount for a period indicating a sustaining characteristic for each defined method based on the attributed result;
Steps 2-5 of normalizing the determined result;
A second-sixth step of setting driving amount characteristic information for each method defined based on the normalization result, and setting reference driving amount characteristic information and driving amount as independent and dependent variables to generate information predicting a driving amount for each of a plurality of different sensor devices and surrounding situations; and
Steps 2-7 of generating the set results as learning and training data;
Oxygen concentration and water level measurement system inside the manhole for water and sewage, characterized in that it comprises a.
The method of claim 1,
The multipurpose ultrasonic water level gauge
a) a main control unit and a table storing real information including device registration information and state information for different uses are equally provided to each other, and a matching relationship for the table is set and registered in advance;
b) when information in the table is changed with each other, each table is synchronized according to the matching relationship;
c) in the case of synchronizing the table, diversifying information for each type of information for each use by a plurality of different types of measuring devices to match the database;

The multipurpose ultrasonic water level gauge
d) In the corresponding interface unit, an output port table is provided inside, and the output port table diversifies and inputs and outputs corresponding information for each equipment and device type and information type in the same way as the table,
e) In the case of transmitting information, the information is diversified from the output port table and transmitted to the collective main control unit to perform notification;
f) In case of transmitting information, when information in the table is changed in conjunction with the table, information on the output port table is synchronized and changed;
The matching relationship is also provided with a matching relationship for the output port table to operate in combination with each other; Oxygen concentration and water level measurement system inside the manhole for water and sewage, characterized by a.
The method of claim 2,
The main control unit,
a) a plurality of different management information processing devices or managers terminals having a table that stores actual information including device registration information and state information for different uses identically to each other, and matching relationships with the tables are set and registered in advance;
b) when information in the table is changed with each other, each table is synchronized according to the matching relationship;
c) When synchronizing the table, the database is matched by diversifying information for each type of information for each use of a number of different types of measuring devices;

The main control unit,
d) In the corresponding interface unit, an output port table is provided inside, and the output port table diversifies and inputs and outputs corresponding information for each equipment and device type and information type in the same way as the table,
e) In the case of transmitting information, the information is diversified from the output port table and transmitted to a batch management information processing device or a manager terminal to perform notification,
f) In addition, when transmitting information, when changing information in the table in conjunction with the table, information on the output port table is also synchronized and changed,
The matching relationship is also provided with a matching relationship for the output port table to operate in combination with each other; Oxygen concentration and water level measurement system inside the manhole for water and sewage, characterized by a.

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