JP6145243B2 - Water pipe monitoring device - Google Patents

Description

  The present invention relates to a water pipe monitoring device that monitors the presence or absence of occurrence of water leaks, water hammers, etc. in water pipes, the actual use situation of water, and the like.

  Conventionally, sound pressure detection devices and data recording devices have been installed in many fire hydrants and air valves installed in the middle of water pipes to automatically detect sound pressure for a long time and automatically record data on memory cards. The sound pressure data recorded and recorded on the many memory cards is input to a computer to be processed, analyzed, and stored to monitor the water pipe (see Patent Document 1).

  However, in this method, the operator must go around the installation location of the data recording device, collect the memory card one by one, take time to collect the data, and input the sound pressure data to the computer. It was not possible to know the occurrence of water leakage, water hammer, etc., and the actual usage of water.

  In order to eliminate such inconvenience, a data collection device in which a sound pressure detection device and a data recording device are integrated, and a portable data analysis device, the operator carries the data analysis device while traveling around. A water line monitoring device has been developed that wirelessly transmits sound pressure data from a data collection device to a data analysis device.

  According to the above water pipe monitoring device, it is not necessary to collect memory cards one by one, and the labor of the worker can be greatly reduced. It is possible to immediately check the actual usage situation.

JP-A-6-186126

  In the water pipe monitoring device, sound pressure data can be recorded over a plurality of days in the data collection device, and the data analysis device receives the sound pressure data and displays the numerical value on the display device. In addition, it was confirmed whether water leaks, water hammers, etc. occurred and the actual conditions of water use.

  However, in the data analyzer, the sound pressure data is numerically displayed to check whether or not water leakage has occurred. Judgments vary depending on skill and experience, and judgment errors are likely to occur.

  In addition, in the data analyzer, by confirming the actual usage status of water by displaying the sound pressure data numerically, if the sound pressure data numerically displayed on the display device is not printed on the paper by the output device, Progress information etc. cannot be grasped reliably.

  The present invention has been made to solve such problems, and it does not require the skill and experience of an operator to determine whether or not water leakage has occurred, and even without printing on paper. An object of the present invention is to provide a water pipe monitoring device that can easily grasp progress information and the like.

In order to achieve the above object, a water pipe monitoring device according to the present invention includes a plurality of data collection devices provided with sound pressure sensors installed in ancillary facilities of water pipes, and data collected by these data collection devices and wirelessly. A water pipe monitoring device comprising a display device and a portable data analysis device for transmitting and receiving the sound pressure value at predetermined intervals over a predetermined time of day Measuring, recording, extracting and storing the minimum sound pressure value at the measured time, comparing the minimum sound pressure value data with a plurality of arbitrarily set sound pressure threshold values, and the minimum sound pressure value data And the sound pressure threshold value, the presence or absence of an abnormality such as water leakage is determined, and the old data is deleted and the latest predetermined number of days of data is retained. , The worker During the rotation, the sound pressure value data, the minimum sound pressure value data, and the determination result over a predetermined time are received from the plurality of data collection devices, and the determination result mark corresponding to the determination result is displayed on the screen of the display device. And a minimum sound pressure value is displayed.

Here, it is preferable that the determination result mark can be easily grasped visually if a design corresponding to the level LV of the determination result is used.

In particular, it is preferable to use a design of a heel as the determination result mark so that the numbers 1 to 3 of the heel correspond to the levels LV1 to LV1 of the determination result.

Further, the data analysis device displays sound pressure value data received from the data collection device in various graphs on the screen of the display device.

In particular, it is preferable to display the transition of the minimum sound pressure value in the latest predetermined number of days as the graph.

  Further, even a steady sound in a pipe line is fluctuating, and in order to remove the instantaneous minimum value as invalid sound pressure value data, it is preferable to employ a discontinuous removal filter.

  According to the water pipe monitoring device of the present invention, the presence or absence of leakage or the like is determined based on the set sound pressure threshold, and the level is displayed as a graphic by the determination result mark. There is no difference in judgment and no judgment mistakes occur.

  Further, since the sound pressure value data can be displayed on the screen as various graphs in the data analyzer, it is not necessary to print on the paper surface by the output device, and the progress information and the like can be grasped visually.

It is explanatory drawing of a water pipe monitoring apparatus. It is an external view of a data collection device. It is an external view of a data analyzer. It is explanatory drawing which shows the outline | summary of the data processing in a water pipe monitoring apparatus. It is explanatory drawing which shows the data preserve | saved in a data collection device. It is explanatory drawing which shows the determination flow performed in a data collection device. It is a figure which shows the display screen of the data analyzer at the time of data reception. It is a figure which shows the display screen of the data analyzer at the time of data alignment. It is the figure which displayed on the screen the graph which shows transition of the minimum sound pressure value. It is the figure which displayed on the screen the graph which shows the distribution of the sound pressure value in 1 day. It is the figure which displayed on the screen the graph which shows the sound pressure value distribution in 1 day divided into 6 parts.

  First, the water pipe monitoring device of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the water pipe monitoring device 1 is composed of a plurality of data collection devices 2 and a data analysis device 3, and the data collection device 2 and the data analysis device 3 transmit commands and data wirelessly. Send and receive.

As shown in FIG. 2, the data collection device 2 has a sound pressure sensor 21 disposed at the lower end and an antenna 22 and a gripping member 23 disposed at the upper end.
Then, the gripping member 23 is gripped and carried, and as shown in FIG. 1, the gripping member 23 is installed in auxiliary equipment such as a control valve, a fire hydrant, and a meter of the water pipe L.

As shown in FIG. 3, the data analysis device 3 has a display device 32 and operation buttons 33 arranged on the surface portion of a casing 31 and an antenna 34 arranged on the upper end portion.
Then, the data received from the data collection device 2 can be processed and analyzed, and numerical display, graph display, graphic display, etc. can be performed on the display device 32.

The data collection device 2 records the sound pressure value at a predetermined interval (1 to 60 seconds) for 2 hours (2 to 4 o'clock) in the midnight time zone when there are few living sounds, and the minimum sound pressure in the measured 2 hours The value is the sound pressure data used for water leakage determination.
The water leakage sound is generated continuously, and there is basically no sudden change in sound volume. The cause of sudden increase in sound may be life sound, operation sound of electrical equipment such as vending machines, etc., but it does not continue to be generated for 2 hours. Therefore, if the minimum sound pressure value is monitored, the magnitude of the sound originally generated from the water pipe line can be known.
If a predetermined threshold value is set based on the volume of the sound that is originally generated, the location showing the minimum sound pressure value that greatly exceeds this threshold value is assumed that some abnormal sound is occurring, and water leakage occurs. It can be determined that it has occurred.

In the data collection device 2, as shown in FIG. 4, sound pressure values are measured and recorded at predetermined intervals for 2 hours per day. Further, the minimum sound pressure value measured for 2 hours is extracted and stored.
Then, as shown in FIG. 5, the sound pressure value and the minimum sound pressure value over 2 hours are stored over a plurality of days (maximum 35 days). Here, the storage is continued after the 35th day, but in this case, the old data is deleted, and the latest 35 days of data are always stored.

  Next, an abnormal state determination method such as water leakage executed in the data collection device 2 will be described with reference to a determination flowchart shown in FIG.

As the target data for the abnormal state determination, the sound pressure value data of the most recent day is used. First, invalid sound pressure value data is removed from these sound pressure value data by a discontinuous removal filter.
The data collection device 2 detects water leakage using the minimum sound pressure value in the pipeline, but even the steady sound in the pipeline fluctuates, and the instantaneous minimum value is used as the minimum sound pressure. If it is grasped as a value, the abnormal state determination will be wrong.
Therefore, in order to remove such a local minimum value as invalid sound pressure value data, a discontinuous removal filter is employed.

The discontinuous removal filter removes sound pressure value data that satisfies the following condition 1 and satisfies the condition 2 or 3 as invalid sound pressure value data.

Condition 1. The sound pressure value data that is less than the sound pressure value with the highest occurrence frequency is selected as a removal target.
Condition 2. The sound pressure value data that exists independently and is not connected to other sound pressure values is targeted for removal.
Condition 3. Sound pressure value data with a count number that is not more than 1% (rounded up to the nearest decimal point) of the most frequently occurring sound pressure value is removed from the population.

  First, if sound pressure value data as shown in Table 1 is obtained, the data to be removed is less than 15 dB according to Condition 1, and further underlined in Table 1 according to Condition 2. As shown, the data is 0 dB and 3 dB.

Next, since the number of counts in the sound pressure value of the most frequently occurring frequency is 220, 1% (rounded up after the decimal point) is 3.
Therefore, according to the condition 3, the data to be removed is 5 dB and 6 dB as shown by the underline in Table 2.

  Therefore, if invalid sound pressure value data is removed from the sound pressure value data as shown in Table 1 by the discontinuous removal filter, sound pressure value data as shown in Table 3 is obtained.

  As described above, as can be seen from Table 3, 8 dB can be extracted as the minimum sound pressure value data used as the target data for the abnormal state determination.

  Next, the minimum sound pressure value data is compared with an arbitrarily set sound pressure threshold value (LV1, LV2, LV3: LV1 <LV2 <LV3).

When the minimum sound pressure value data is smaller than LV1, it is determined that there is no abnormality. Next, when the minimum sound pressure value data is smaller than LV2, smaller than LV3, larger than LV3,
It is determined that each of the levels LV1 to 3 is abnormal.

  The result thus determined is stored in the data collection device 2 and transmitted to the data analysis device 3 as shown in FIG.

As shown in FIG. 4, the data analysis device 3 receives sound pressure value data, minimum sound pressure value data, and determination results over a period of two hours from a plurality of data collection devices 2, 2,.
FIG. 7 is a diagram showing a display screen of the display device 32 at the time of data reception. A reception mark 41 is displayed at the upper left, a determination result mark 42 and a minimum sound pressure value 43 are displayed at the center.
Further, the identification number 44 of each data collection device 2, 2... Is displayed on the left side, and the data reception date 45 is displayed on the right side.

  Here, as the determination result mark 42, a design of 雫 is used, and as the 雫 becomes 1 to 3, it corresponds to the abnormality determination of the levels LV1 to LV3.

  FIG. 8 is a diagram showing a display screen of the display device 32 at the time of data alignment. When the black and white display of the data list is reversed, the sound pressure value data of the data collection device 2 can be displayed in various graphs.

  FIG. 9 is a diagram in which a graph showing the transition of the minimum sound pressure value is displayed on the screen, and a change in the minimum sound pressure value during the measurement period can be confirmed.

  FIG. 10 is a diagram in which a graph showing the distribution of sound pressure values in one day is displayed on the screen, and the distribution of sound pressure values measured in one day can be confirmed.

FIG. 11 is a diagram in which a graph showing the distribution of sound pressure values in one day divided into six is displayed on a screen, and changes in sound pressure values in one day can be confirmed in time series.

  As described above, the water pipe monitoring device of the present invention determines whether or not water leakage has occurred based on the set sound pressure threshold value, and displays the level of the design with the determination result mark 42. There is no difference in judgments such as water leakage, and no judgment mistakes occur.

  Further, since the sound pressure value data can be displayed on the screen as various graphs in the data analyzer, it is not necessary to print on the paper surface by the output device, and the progress information and the like can be grasped visually.

  Furthermore, since the discontinuous removal filter is employed to remove the instantaneous local minimum value in the pipeline as invalid sound pressure value data, the accuracy of determining whether or not water leakage has occurred can be further improved.

DESCRIPTION OF SYMBOLS 1 Water pipe monitoring equipment 2 Data collection apparatus 21 Sound pressure sensor 22 Antenna 3 Data analysis apparatus 32 Display apparatus 34 Antenna 42 Judgment result mark 43 Minimum sound pressure value 44 Identification number 45 Data reception date L Water pipe line

Claims (6)

Is installed in ancillary facilities of water conduit, a plurality of data collection devices arranged the sound pressure sensor, to transmit and receive data by radio with these data collection devices, and portable data analyzer arranged the display device, from A water pipe monitoring device configured,
The data collection device measures and records sound pressure values at predetermined intervals over a predetermined time in a day, extracts and stores the minimum sound pressure value at the measured time, and stores the minimum sound pressure value data. compared to a plurality of sound pressure threshold value set arbitrarily, depending on the magnitude of the sound pressure threshold value and the minimum sound pressure value data, to determine the presence or absence of abnormal water leakage or the like, it erases the old data, It holds the latest predetermined number of days of data,
The data analysis device receives sound pressure value data, minimum sound pressure value data, and determination results over a predetermined time from a plurality of the data collection devices while an operator circulates a water pipe, and displays the same. The water pipe monitoring device , wherein a determination result mark and a minimum sound pressure value corresponding to the determination result are displayed on the screen . The water pipe monitoring device according to claim 1, wherein the determination result mark uses a design corresponding to a level LV of the determination result . 3. The water line monitoring device according to claim 2, wherein the determination result mark is a design of ridges, and the numbers 1 to 3 of the ridges correspond to the determination result levels LV1 to LV3 . The water pipe according to any one of claims 1 to 3, wherein the data analysis device displays sound pressure value data received from the data collection device as various graphs on a screen of the display device. Monitoring device. 5. The water line monitoring device according to claim 4, wherein a transition of the minimum sound pressure value in the latest predetermined number of days is displayed as the graph . The water supply according to any one of claims 1 to 5, wherein the data collection device further employs a discontinuous removal filter that removes an instantaneous local minimum value in a pipeline as invalid sound pressure value data. Pipe line monitoring device.

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