JPH0238963A - Data gathering device for control over film resistance of underground buried pipe - Google Patents

Abstract

PURPOSE:To perform intermittent measurement continuously for a long time without any person's intervention by storing an instrument body which incorporates a device main body for storing data as time-series data in a terminal box and gathering data. CONSTITUTION:Wires W1 and W2 connected to both ends of a shunt resistance 22 provided to feed wiring 21 extending from the buried pipe 1 to an Mg anode 20 and wiring W3 from a Zr matching electrode 23 are connected to the device main body 11 and the instrument body 3 is put in the terminal box 2. Data on the earth potential and current of the buried pipe 1 is converted into digital data by an A/O converting means 5 which is controlled by a timer means 10 and a control means 9 and stored as the time-series data in a storage means 6 in order. External equipment 7 is carried a prescribed time later and the instrument body 3 is taken out and connected to a gathering device main body 11; and the time-series data stored on the storage means 6 is transferred and recorded on recording paper 18.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a data collection device for managing coating film resistance of underground pipes such as gas pipes.

[Conventional technology and its problems]

An insulating coating is formed on the outside surface of underground pipes to prevent corrosion, but this coating is often damaged by construction work by other companies near the underground pipe. Therefore, it is necessary to manage the coating resistance to clarify the presence or absence of damage and the date and time of damage.

Conventionally, such coating film resistance has been measured by a method using a resistance direct reading type recorder or a method using recorders corresponding to the tube-to-ground potential and current respectively. These methods will be explained with reference to Fig. 5. First, the former method is as shown in Fig. 5 (a). The wiring from the pipe is connected to a recorder e having a built-in resistance calculation means, and changes in the tube-to-ground potential and current are recorded on a recording paper f, and the resistance is digitally displayed. In the latter method, as shown in Fig. 5(b), the buried pipe is temporarily energized through the temporary energizing wiring Q to the energizing electrode C, and at this time, if the buried pipe is connected, the buried pipe is checked. [Between poles d and the temporary energizing wiring Q
Recorders e and e connected respectively between the shunt resistors installed in
' Record changes in tube ground potential and current respectively by M1f
, f', and the coating film resistance is calculated based on such records.

However, as described above, the method using recording paper is vulnerable to bad weather such as rain and consumes a lot of power, making it difficult to carry out continuous measurements over long periods of time using batteries.
Since the 8N device is large, it is difficult to secure a storage space for continuous measurements, and although daily measurements can be performed manually, continuous measurements over long periods of time cannot be performed unattended. In this way, with conventional methods, it is not possible to measure continuously over a long period of time, so the date and time when the coating resistance decreased is often not clear, and therefore it is difficult to identify other companies that caused damage to underground pipes. The problem is that it is not easy.

In addition to the above method, there is a simple method of measuring the resistance between the terminal of the buried pipe and the ground using a lamp tester or megger, but this method does not allow continuous measurement over a long period of time, Accuracy is also poor.

The present invention aims to solve the above-mentioned conventional problems.

(Means for Solving the Problems) The configuration of the present invention will be explained with reference to FIGS. 1 to 4 corresponding to the embodiments. An edible terminal, a container 3 that can be stored in Lubox 2, includes an analog data input means 4 corresponding to the ground potential and current of the underground pipe 1, and an A/D conversion means for converting the analog data into digital data. 5, storage means 6 for storing the digital data as time series data,
A data communication means 8 for transmitting stored time series data to an external device 7, a device main body 11 comprising these tiqw means 9 and a timekeeping means 10, and a battery 12 for operating the above means. It is built-in.

Next, the invention described in item 2 provides an analog data input means corresponding to the ground potential and current of the underground pipe 1 to a container body 3 that can be stored in the anti-corrosion terminal box 2 of the underground pipe 1. 4, A/D conversion means 5 for converting the analog data into digital data, calculation means 13 for calculating resistance from input data, and storage means 6 for storing digital data corresponding to the resistance as time series data. , a data communication means 8 for transmitting stored time-series data to an external device 7, a device body 11 comprising a control means 9 and a clock means 10, and a battery 12 for operating the above means. It has a built-in

Next, in the invention described in Item 3, in the invention described in Item 1 or 2, a waterproof cap 14 is provided on one side of the vessel body 3, and when the waterproof cap 14 is in an open state, The device 7 and the data communication means 8 are electrically connected to each other.

Next, the invention described in item 4 is based on the invention described in item 1 or 2, in which a waterproof cap 14 is provided on one side of the container body 3 with a portion a made transparent, and the collecting device body An operation indicator lamp 15 is provided at a location corresponding to 11.

Next, in the invention described in item 5, in the invention described in item 1, the external device 7 includes a control means 16 for sending a data transfer command to the collection device main body 11 via the data communication means 8;
The ground potential of the buried pipe 1 and 12I! transferred from the collection device main body 11 via the data communication means 8! , and a recording means 19 for recording the calculated resistance on a recording paper 18 over time in accordance with the data collection period.

Furthermore, in the invention described in Item 6, in the invention described in Item 2, the external device 7 includes a control means 16 for sending a data transfer command to the collection device main body 11 via the data communication means 8;
Recording means 1 for recording time-series data corresponding to resistance, transferred from the collection device main body 11 via the data communication means 8, on a recording paper 18 over time in accordance with the data collection period.
It has two features.

(Operation and Examples) The operation of the present invention having the above configuration will be explained based on the drawings corresponding to the embodiments. First, in the present invention, at the location of the anticorrosion terminal box 2 of the underground pipe 1, wires Wl and W2 are connected to both ends of the shunt resistor 22 provided in the current-carrying wire 21 extending from the underground pipe 1 to the 8g anode 20. and the wiring W3 from the In comparison electrode 23 is connected to the analog data input means 4 of the device main body 11 via the connector 24, and in this state, the device main body 11 is operated and the device body 3 is stored in the terminal box 2. do. Reference numeral 25 is a lid of the terminal box 2.

Therefore, the analog data corresponding to the ground potential and current of the buried pipe 1, which are inputted to the analog input means 4 through the above-mentioned intervals PJWt, W2, and W3, are controlled by the control means 9 based on the time measurement means 10. The /D conversion means 5 converts the data into digital data at preset time intervals. The analog input means 4 inputs the above-mentioned intervals IW+, W2, W
3 is for converting the analog data input through A/D conversion means 5 into a signal state suitable for A/D conversion by the A/D conversion means 5, and is constituted by suitable elements such as a podium, a multiplexer, etc.

Therefore, in the invention described in item 1, the respective data thus converted into digital data, that is, the digital data corresponding to the ground potential and the current, are sequentially input to the storage means 6, The data is stored as time-series data. On the other hand, in the invention described in item 2, the calculation means 1
3, the resistance is calculated from each of the above-mentioned input data, and digital data corresponding to the calculated resistance is sequentially input to the storage means 6 and stored as time-series data.

As described above, the device body 11 can sequentially store and collect data corresponding to the ground potential and current or resistance of the buried pipe 1 at preset time intervals as time-series data. 11 does not require components that consume large amounts of power, such as a means for recording on recording paper, so it is easy to achieve low consumption I power, and therefore the built-in battery 12
This enables continuous, intermittent measurements over long periods of time without anyone being present.

When the predetermined measurement time has elapsed in this way, the external device 7 is carried near the terminal box 2, the container 3 is taken out from the terminal box 2, and the data communication means 8 of the collection device main body 11 is and the data communication means 26 of the external device 7 are connected by a communication cable 29 via connectors 27 and 28, respectively. Thereafter, when a data transfer command is issued from the 111111 means 16 of the external device 7 to the control means 9 of the collection device main body 11 via the communication cable 29, the control means 9 that received this command stores the data in the storage means 6. The time-series data that is present is transferred to the external device 7 via the data communication means 8, the communication cable 29, and the data communication means 26.

In the invention described in item 5, the external device 7 first uses the calculation means 17 from the time series data corresponding to the ground potential and current of the buried pipe 1 transferred from the collection device main body 11 as described above. , the resistance is calculated for each corresponding elapsed time, and then the calculated resistance is recorded over time on the record 118 by one recording means corresponding to the data collection period by the collection device main body 11.

On the other hand, in the invention described in item 6, the external device 7 transmits the time-series data corresponding to the ground resistance of the buried iiQ tube 1 transferred from the collection device main body 11 as described above to the collection device main body 11. The recording means 19 records the data on the recording paper 18 over time in accordance with the data collection period.

As described above, the present invention can continuously collect data corresponding to the ground resistance of the buried pipe 1 at appropriate time intervals over a long period of time, and the collected data can be collected at each time point during the collection period. Since it can be displayed chronologically on the recording paper 18 corresponding to the time, it is possible to easily and clearly detect the date and time when the resistance decreased, that is, the date and time when the buried pipe 1 received an old damage. Therefore J! I! It is also easy to identify other companies that caused damage to pipe 1.

As mentioned above, since the container 3 is a small IIl structure that is stored inside the terminal box 2, there is no need to secure a new storage space during the data convergence period of 1 m, and it is easy to waterproof, so the terminal box Combined with the fact that it is stored in a storage compartment 2, it is possible to perform continuous measurements unaffected by bad weather such as rain.

The waterproof structure of the container body 3 includes, for example, as shown in FIG. 4, a waterproof cap 14 is provided on one side of the container body 3.
4 is in the open state, in addition to replacing the battery 12, the external device 7 and the data communication means 8 are electrically connected,
During the data collection period, the configurations flW+, W2, W
By storing all the components other than the interface section between the data input means 4 and the data input means 4 in the container body 3 through the waterproof gap 14, waterproofing can be effectively achieved. In this case, the waterproof cap 14 on one side of the vessel 3
If a part a of the data collection device 3 is made transparent and an operation indicator lamp 15 is provided at a corresponding location on the collection device main body 11, an operator can operate the device from the outside of the device body 3 as needed at a timely time after data collection has started. The status can be checked, making management easier.

In the embodiment shown in FIG. 4, a portion a of the waterproof cap 14 is a hole, and a transparent plate 30 is made to correspond to the hole so that the portion a is transparent.

Each component of the collection device body 11 described above can be configured as appropriate, such as using a microcomputer, and the external device 7 can also be configured as appropriate, such as a hand belt computer.

In the embodiment of FIG. 4, numeral 31 is an external ':Ii source connector, and 32 is an O-ring.

〔Effect of the invention〕

As described above, the present invention stores data corresponding to the ground potential and current or resistance of buried pipes as digital time-series data without integrating components that consume a large amount of power, such as recording means on recording paper. The main body of the measuring device is built into the device along with the battery, and the device is stored in a terminal box to collect the data, so there is no need to secure a new storage location for the measuring device, and it is also waterproof. Because it is easy to use, it is not affected by the weather, and the built-in battery allows for continuous, unattended measurements over a long period of time, for example, half a year.

After the predetermined collection period ends, the time-series data collected and stored in the collection device is transferred to an external device connected via a communication cable, and the external device calculates the ground resistance of the buried pipe. Since it can be displayed chronologically on the recording paper corresponding to each time during the collection period, it is possible to easily and clearly detect the date and time when the buried pipe was damaged. This has the effect of making it easy to identify other companies that have given the information. In particular, during the data collection period, the instrument body can be effectively waterproofed by storing all of its components except for a certain part, which will prevent it from being affected by the weather. In addition to ensuring continuous measurement over a long period of time, the waterproof cap is partially transparent so that the operation indicator lamp on the device body can be viewed from here, making it possible to confirm operation at a timely point during data collection. This has the effect of being easy to perform and easy to manage.

[Brief explanation of the drawing]

Figures 1 to 4 correspond to embodiments of the present invention, with Figure 1 being a schematic explanatory diagram showing the outline of the overall configuration, Figures 2 and 3.
The figure is a system explanatory diagram of the main part configuration, FIG. 4 is an explanatory perspective view of the main part constitution, and FIGS. 5(a) and 5(b) are schematic explanatory diagrams of a conventional example. Code 1... Underground pipe, 2... Corrosion prevention terminal box, 3... Vessel body, 4... Analog data input means, 5... A/D conversion means, 6... Memory means, 7.
... External device, 8... Data communication means, 9... Control means, 10... Timing means, 11... Device main body 1.1
2...Battery, 13...Calculating means, 14...Waterproof cap, 15...Operation display lamp, 16...Controlling means, 17...Calculating means, 18...Recording paper, 19・・・
・Recording means, 2o... seasonal anode, 21... energizing wiring,
22... Shunt resistor, 23... Zn reference electrode, 2
4... Connector, 25... Lid, 26... Data communication means, 27. 28... Connector, 29... Communication cable, 30... Transparent plate, 31... External power connector, 32...0 ring, Vvh, W2,
W3...Wiring.

Claims (6)

[Claims] (1) Analog data input means corresponding to the ground potential and current of the underground pipe, and A for converting the analog data into digital data, in a container that can be stored in a terminal box for corrosion protection of underground pipes. /D conversion means; storage means for storing the digital data as time series data;
The device is characterized by having a built-in device main body comprising a data communication means for transmitting stored time series data to an external device, a control means and a timing means, and a battery for operating the above means. Data collection device for coating resistance management of underground pipes. (2) Analog data input means corresponding to the ground potential and current of the underground pipe, and A for converting the analog data into digital data, in a container that can be stored in a terminal box for corrosion protection of underground pipes. /D conversion means, calculation means for calculating resistance from input data, storage means for storing digital data corresponding to the resistance as time series data, and data for transferring the stored time series data to external equipment. 1. A data collection device for managing coating film resistance of underground pipes, comprising a device main body comprising a communication means, a control means and a timing means, and a built-in battery for operating the above means. (3) In the data collection device described in paragraph 1 or 2, a waterproof cap is provided on one side of the device, and when the waterproof cap is open, the electrical connection between the external device and the data communication means is established. A data collection device for managing coating film resistance of underground pipes. (4) In the data collection device described in paragraph 1 or 2, a partially transparent waterproof cap is provided on one side of the device, and an operation indicator lamp is provided at a corresponding location on the device body. Data collection device for coating resistance management of underground pipes. (5) In the data collection device described in paragraph 1, the external device includes a control means for sending a data transfer command to the collection device main body via the data communication means, and a control means for sending a data transfer command to the collection device main body via the data communication means. a calculation means for calculating the resistance from time-series data corresponding to the ground potential and current of the buried pipe transferred from the underground pipe; and a recording means for recording the calculated resistance over time on a recording paper corresponding to the data collection period. A data collection device for controlling coating film resistance of underground pipes. (6) In the data collection device according to item 2, the external device includes a control means for sending a data transfer command to the collection device main body via the data communication means, and a control device that sends a data transfer command to the collection device main body via the data communication means. A data collection device for managing coating film resistance of underground pipes, which is provided with a recording means for recording time-series data corresponding to the resistance transferred from the underground pipe over time on recording paper corresponding to the data collection period.