JPH08105905A - Detecting device of traveling position and traveling speed of pig - Google Patents

Detecting device of traveling position and traveling speed of pig

Info

Publication number
JPH08105905A
JPH08105905A JP6239086A JP23908694A JPH08105905A JP H08105905 A JPH08105905 A JP H08105905A JP 6239086 A JP6239086 A JP 6239086A JP 23908694 A JP23908694 A JP 23908694A JP H08105905 A JPH08105905 A JP H08105905A
Authority
JP
Japan
Prior art keywords
signal
pig
traveling
speed
receiving side
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP6239086A
Other languages
Japanese (ja)
Inventor
Yasushi Yonemura
康 米村
Takashi Imaoka
隆司 今岡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokyo Gas Co Ltd
Original Assignee
Tokyo Gas Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tokyo Gas Co Ltd filed Critical Tokyo Gas Co Ltd
Priority to JP6239086A priority Critical patent/JPH08105905A/en
Publication of JPH08105905A publication Critical patent/JPH08105905A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To transmit a signal on the basis of a set frequency pattern from a pig, and receive the signal on a receiving side, whereby a measuring person can grasp the position and traveling speed of the pig only by being on the receiving side. CONSTITUTION: In a pig 10 constituted to be traveled within a conduit 11, a signal is generated according to a data related to the frequency pattern of a set signal, and transmitted to a transmitter 14, and the transmitter 14 modulates the signal from a signal generator 13 into a carrier wave, and transmits it to a receiving side. On the other hand, the same data as the frequency pattern of the signal to transmit L on the pig 10 is generated synchronously with the timing of transmitting from the transmitter 14 to the receiving side, and compared and collated with the received signal to calculate the delay time δt of the received signal. Further, the traveling position is determined from the delay time δt of the signal and the speed of the radio wave, and the traveling speed is determined from the frequency shift of the signal.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、導管内を走行させるよ
うしたピグから、所定時間ごとに周波数を変えるように
した信号を発信し、この信号に基づいて、ピグの位置、
走行速度を把握するようにした、ピグの走行位置および
走行速度検出装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention transmits a signal whose frequency is changed at a predetermined time from a pig running in a conduit, and based on this signal, the position of the pig,
The present invention relates to a traveling position of a pig and a traveling speed detecting device for grasping traveling speed.

【0002】[0002]

【従来の技術】従来、地中に敷設した導管内を走行させ
るようにしたピグには、腐食減肉等の欠陥を検査するた
めの検査用ピグ、導管内の清掃のためのクリーニングピ
グ、さらに、導管内面の形状を検査をするためのキャリ
パーピグがある。
2. Description of the Related Art Conventionally, a pig which is designed to run in a conduit laid in the ground includes an inspection pig for inspecting for defects such as corrosion thinning, a cleaning pig for cleaning the inside of the conduit, There is a caliper pig for inspecting the shape of the inner surface of the conduit.

【0003】ところで、ピグを導管内において走行させ
る際、ピグが導管のどの位置を走行中であるか、常時把
握するようにすると、作業進行上、好都合なことが多
い。このようなピグを走行させる導管のうち、例えばガ
ス管において、鋼管製のものは、溶接によって接合構成
されることから、ピグ1が溶接線Mを通過する時に生ず
る音を捉えることにより、ピグ1の位置を把握するよう
にしている。なお、ピグ1が溶接線Mを通過する時に生
ずる音とは、内径が他の箇所よりも管壁全周にわたって
狭い溶接箇所をピグ1が通過する際に発生する打撃音の
ことである。かかるピグ1の通過音は、埋設された導管
2に地表から接触するように、適所に設けた沈下棒3に
聴音器Rを取り付けて、この聴音器Rにより、拾うこと
ができる(図4参照)。
[0003] By the way, when the pig is traveling in the conduit, it is often convenient for the progress of work if the position of the conduit in which the pig is traveling is always known. Among the conduits for running the pig, for example, a gas pipe made of steel pipe is joined by welding, and therefore, the sound generated when the pig 1 passes through the welding line M is detected, so that the pig 1 I try to understand the position of. The sound generated when the pig 1 passes through the welding line M is an impact sound generated when the pig 1 passes through a welding portion having an inner diameter narrower over the entire circumference of the pipe wall than other portions. The sound passing through the pig 1 can be picked up by the sounding device R by attaching the sounding device R to the sinking rod 3 provided at a proper position so as to contact the buried conduit 2 from the ground surface (see FIG. 4). ).

【0004】[0004]

【発明が解決しようとする課題】しかしながら、上述の
ような方法では、 多くの箇所での計測が必要、 測定者が聴音器により、ピグ1の通過音を拾うという
作業であるので、正確な位置の特定が困難、 ピグ1の通過に合わせて測定者も移動しなければなら
ないか、複数の測定者が必要、といった不都合がある。 本発明は、このような不都合を改善するためになされた
ものであって、導管内を走行させるようしたピグから、
所定時間ごとに周波数を変えるようにした信号を発信
し、この信号に基づいて、ピグの位置、走行速度を把握
するようにした、ピグの走行位置および走行速度検出装
置を提供することを目的とする。
However, in the method as described above, it is necessary to perform measurement at many points, and the operator must pick up the passing sound of the pig 1 with the aid of a hearing aid. Is difficult to identify, the measurer must move in accordance with the passage of the pig 1, or a plurality of measurers are required. The present invention has been made in order to improve such inconvenience, and from a pig adapted to run in a conduit,
An object of the present invention is to provide a traveling position and traveling speed detection device for a pig, which emits a signal whose frequency is changed every predetermined time and grasps the position and traveling speed of the pig based on this signal. To do.

【0005】[0005]

【課題を解決するための手段】前記した課題を解決する
ために、本発明は、導管内を走行させるようにしたピグ
において、信号を発振する時間間隔と、時間間隔ごとの
信号の周波数をあらかじめ設定するための信号設定手段
と、信号設定手段に基づいて信号を発生する信号発生器
と、その信号を受信側に送信する送信器とを備え、前記
受信側において、送信器からの信号を受信する受信器
と、この受信信号によりピグの走行速度および走行位置
を求める速度位置導出手段とを有し、この速度位置導出
手段は、ピグにおける信号設定手段による設定した信号
と同信号を格納する格納手段と、この格納手段からの信
号と前記受信信号とを比較照合する比較手段とを備え、
前記ピグの送信器から設定にかかる信号を受信側の受信
器に送信する一方、前記速度位置導出手段における格納
手段から同期的に前記設定にかかる信号と同信号を比較
手段に送出し、その受信信号と格納手段からの信号とを
比較照合して遅れ時間を求め、信号の遅れ時間と電波の
速度とから走行速度および走行位置を求める構成とした
ことを特徴とする。
SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the present invention, in a pig adapted to run in a conduit, a time interval for oscillating a signal and a frequency of the signal for each time interval are set in advance. A signal setting unit for setting, a signal generator that generates a signal based on the signal setting unit, and a transmitter that transmits the signal to a receiving side, and the receiving side receives the signal from the transmitter. And a speed position derivation means for obtaining the traveling speed and traveling position of the pig based on the received signal, and the speed position derivation means stores the same signal as the signal set by the signal setting means in the pig. Means and comparing means for comparing and collating the signal from the storage means with the received signal,
While transmitting the setting signal from the pig transmitter to the receiver on the receiving side, the storing unit in the velocity position deriving unit synchronously sends the setting signal and the same signal to the comparing unit and receives the signal. It is characterized in that the signal and the signal from the storage means are compared and collated to obtain the delay time, and the traveling speed and the traveling position are obtained from the signal delay time and the radio wave velocity.

【0006】[0006]

【作用】ピグを導管内に導入して走行させる際、ピグの
信号設定手段において、発振すべき信号の周波数パター
ン、すなわち発振する時間間隔と、発振する時間ごとの
周波数を設定しておき、この設定された信号の周波数パ
ターンに基づいて、信号発生器において信号を発生し、
送信器から、受信側に向けて送信する。受信側において
は、前記ピグの信号設定手段による設定された信号の周
波数パターンと同じデータを同期的に取り出し、前記受
信した信号と比較して、信号の遅れ時間を求め、信号の
遅れ時間に電波速度を乗じて位置を求めることができ
る。さらに受信信号の周波数のシフトから走行速度を導
き出すことができる。従って、測定者は、ピグからの信
号を受ける受信側にいれば、ピグの現在位置、走行速度
を把握することができるので人手がかからず、ピグの位
置を正確に把握することができるので、作業進行上、好
都合である。
When the pig is introduced into the conduit to run, the signal setting means of the pig sets the frequency pattern of the signal to be oscillated, that is, the oscillating time interval and the frequency for each oscillating time. Generates a signal in the signal generator based on the frequency pattern of the set signal,
Transmit from the transmitter to the receiving side. On the receiving side, the same data as the frequency pattern of the signal set by the signal setting means of the pig is taken out synchronously, compared with the received signal, the delay time of the signal is obtained, and the radio wave is set to the signal delay time. The position can be determined by multiplying the velocity. Further, the traveling speed can be derived from the shift of the frequency of the received signal. Therefore, if the measurer is on the receiving side that receives the signal from the pig, the measurer can grasp the current position and traveling speed of the pig, so that no labor is required and the position of the pig can be accurately grasped. It is convenient for work progress.

【0007】[0007]

【実施例】次に、本発明にかかるピグの走行位置および
走行速度検出装置について、一実施例を挙げ、以下詳細
に説明する。図1にピグ10を、地中に埋設した導管1
1内を走行させるところを示す。このピグ10は、導管
11内を走行する際、後述する装置によって、走行位置
および走行速度を把握できるようにしたものである。前
記ピグ10は、導管11内径に対応して、摺動可能なよ
うに寸法が設定され、導管11の一端側に設けたランチ
ャー(導管内にピグを誘導して走行させるための発射
器){図示省略}から導管11内に誘導され、導管11
内を通流する流体の圧力によって、導管11内を走行す
る構成である。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a pig traveling position and traveling speed detecting device according to the present invention will be described in detail below with reference to an embodiment. A conduit 1 in which a pig 10 is buried in the ground in FIG.
1 shows a place where the vehicle runs inside 1. When the pig 10 is traveling in the conduit 11, the traveling position and traveling speed can be grasped by a device described later. The pig 10 has a dimension corresponding to the inner diameter of the conduit 11 and is set to be slidable, and is a launcher provided at one end of the conduit 11 (a launcher for guiding and running the pig in the conduit). The conduit 11 is guided into the conduit 11 from
It is configured to travel inside the conduit 11 by the pressure of the fluid flowing therein.

【0008】以上のようなピグ10には、図2に示すよ
うに信号を発振する時間間隔と、時間間隔ごとの信号の
周波数をあらかじめ設定するための信号設定手段12
と、信号設定手段12に基づいて信号を発生する信号発
生器13と、その信号を受信側に送信する送信器14と
が搭載されている。また、前記受信側は、送信器14か
らの信号を受信する受信器15と、この受信信号により
ピグ10の走行速度および走行位置を求める速度位置導
出手段16とによって構成している。この速度位置導出
手段16は、ピグ10における信号設定手段12による
設定した信号と同信号を格納する格納手段17と、この
格納手段17からの信号と前記受信信号とを比較照合す
る比較手段18とを備えている。
In the pig 10 as described above, a signal setting means 12 for presetting a time interval for oscillating a signal and a signal frequency for each time interval as shown in FIG.
A signal generator 13 for generating a signal based on the signal setting means 12 and a transmitter 14 for transmitting the signal to the receiving side are mounted. The receiving side is composed of a receiver 15 which receives a signal from the transmitter 14, and a speed position deriving means 16 which obtains the traveling speed and the traveling position of the pig 10 based on the received signal. The speed position derivation means 16 includes a storage means 17 for storing the same signal as the signal set by the signal setting means 12 in the pig 10, and a comparison means 18 for comparing and collating the signal from the storage means 17 with the received signal. Is equipped with.

【0009】前記信号設定手段12は、外部からインプ
ットされた送信すべき信号の周波数パターンにかかるデ
ータを格納し、所定のタイミングで、そのデータを取り
出して前記信号発生器13に与える構成である。前記送
信すべき信号の周波数パターンの一例を示すと、図3の
通りである。すなわち、図に示すように、発生する信号
は、例えばt1秒ごとに、第一回目は周波数1KHz、
1秒おいて第二回目は周波数2KHz、第三回目は周
波数3KHz、というように、発振するごとに周波数を
変えるようにしている。このように、発振するたびに周
波数を変えるのは、ピグ10が観測点から遠くまで走行
してしまった場合、信号の送信時刻と受信した時刻との
時間のずれ、すなわち、受信信号の遅れ時間δtが大き
くなり、次の信号発生時刻に受信した時刻が重なったり
すると、毎回同じ周波数の信号では、第何番目の信号か
特定が困難となるからである。なお、信号発生の時間間
隔、周波数は、それぞれ、導管11、ピグ10の走行速
度、ガス圧、他の条件を勘案して、種々変えて設定する
ことができる。
The signal setting means 12 is configured to store data relating to a frequency pattern of a signal to be transmitted, which is input from the outside, take out the data at a predetermined timing, and give the data to the signal generator 13. An example of the frequency pattern of the signal to be transmitted is shown in FIG. That is, as shown in the figure, the generated signal is, for example, every t 1 seconds, the first time has a frequency of 1 KHz,
At t 1 seconds, the frequency is changed to 2 KHz for the second time and 3 KHz for the third time, so that the frequency is changed at each oscillation. In this way, the frequency is changed each time it oscillates because when the pig 10 runs far from the observation point, the time difference between the signal transmission time and the reception time, that is, the delay time of the reception signal This is because if δt becomes large and the times received at the next signal generation time overlap, it becomes difficult to identify the number of the signal with the same frequency signal each time. The time interval and frequency of signal generation can be set variously in consideration of the traveling speed of the conduit 11 and the pig 10, the gas pressure, and other conditions.

【0010】前記信号発生器13は、信号の周波数パタ
ーンにかかるデータにより、信号を発生して送信器14
に送出し、送信器14は、信号発生器13からの信号を
搬送波に変調し、受信側に送信するものである。
The signal generator 13 generates a signal based on the data related to the frequency pattern of the signal, and the transmitter 14
The transmitter 14 modulates the signal from the signal generator 13 into a carrier wave and transmits the carrier wave to the receiving side.

【0011】一方、受信側において、速度位置導出手段
16は、格納手段17から、ピグ10における信号設定
手段12による送信すべき信号の周波数パターンと同じ
データを、送信器14から受信側に送信するタイミング
に同期して、比較手段18に送出する構成としている。
また、速度位置導出手段16は、比較手段18におい
て、格納手段17からの前記送信すべき信号の周波数パ
ターンと同じデータと、受信器15において受信した信
号とを比較照合し、受信器15において受信した信号の
遅れ時間δtを算出する機能を備えている。さらに、速
度位置導出手段16は、信号の遅れ時間δtと電波の速
度とから走行位置を求めると共に、信号の周波数シフト
から走行速度を求める機能を有している。
On the other hand, on the receiving side, the velocity position deriving means 16 transmits from the storing means 17 the same data as the frequency pattern of the signal to be transmitted by the signal setting means 12 in the pig 10 from the transmitter 14 to the receiving side. The data is sent to the comparison means 18 in synchronization with the timing.
Further, the velocity position deriving means 16 compares and collates the same data as the frequency pattern of the signal to be transmitted from the storing means 17 with the signal received by the receiver 15 in the comparing means 18, and receives in the receiver 15. It has a function of calculating the delay time δt of the signal. Further, the speed position deriving means 16 has a function of obtaining the traveling position from the signal delay time δt and the speed of the radio wave, and also obtaining the traveling speed from the frequency shift of the signal.

【0012】本発明にかかるピグ10の走行位置および
走行速度検出装置は、以上のように構成されるものであ
り、次にその作用を説明する。ピグ10を導管11内に
導入して走行させる際、ピグ10の信号設定手段12に
おいて、発振すべき信号の周波数パターン、すなわち発
振する時間間隔(t1)と、発振する時間ごとの周波数
(第一回目1KHz、第二回目2KHz、……)を設定
しておき、この設定された信号の周波数パターンに基づ
いて、信号発生器13において信号を発生し、送信器1
4から、受信側に向けて送信する。受信側において、速
度位置導出手段16は、前記ピグ10の信号設定手段1
2による設定された信号の周波数パターンと同じデータ
を格納手段17から同期的に取り出し、比較手段18に
おいて前記受信した信号と比較照合し、信号の遅れ時間
δtを求め、信号の遅れ時間δtからピグ10の走行速
度を求めることができ、さらに信号の遅れ時間δtに電
波速度を乗じて位置を求めることができる。従って、測
定者は、受信側にいるだけで、ピグ10の現在位置、走
行速度を把握することができるので人手がかからず、ピ
グ10の位置を正確に把握することができ、作業進行
上、好都合である。
The traveling position and traveling speed detecting device of the pig 10 according to the present invention is constructed as described above. Next, its operation will be described. When the pig 10 is introduced into the conduit 11 to run, the signal setting means 12 of the pig 10 oscillates a frequency pattern of a signal to be oscillated, that is, an oscillation time interval (t 1 ) and an oscillation time-dependent frequency (first (1KHz for the first time, 2KHz for the second time, etc.) is set, and a signal is generated by the signal generator 13 based on the frequency pattern of the set signal, and the transmitter 1
4 to the receiving side. On the receiving side, the velocity position deriving means 16 is the signal setting means 1 of the pig 10.
The same data as the frequency pattern of the signal set by 2 is synchronously taken out from the storage means 17, and compared with the received signal in the comparison means 18 to obtain the signal delay time δt, and the signal delay time δt is used. The traveling speed of 10 can be calculated, and the position can be calculated by multiplying the signal delay time δt by the radio wave speed. Therefore, the measurer can grasp the current position and traveling speed of the pig 10 only by being on the receiving side, and therefore the operator can grasp the position of the pig 10 accurately without any labor. , Convenient.

【0013】[0013]

【発明の効果】以上、本発明によれば、測定者は、受信
側にいるだけで、ピグの現在位置、走行速度を把握する
ことができるので人手がかからず、種々の作業進行の向
上に寄与することができる。
As described above, according to the present invention, since the measurer can grasp the current position and traveling speed of the pig only by being on the receiving side, no labor is required, and various work progress is improved. Can contribute to.

【0014】[0014]

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明にかかるピグを導管内を走行させるとこ
ろを示す模式的な説明図である。
FIG. 1 is a schematic explanatory view showing how a pig according to the present invention travels in a conduit.

【図2】図1に示すピグに適用された走行位置および走
行速度検出装置の一例を示す概略ブロック構成図であ
る。
FIG. 2 is a schematic block configuration diagram showing an example of a traveling position and traveling speed detection device applied to the pig shown in FIG.

【図3】図2に示す走行位置および走行速度検出装置に
おいて、設定される信号の周波数パターンの一例をを示
すグラフである。
FIG. 3 is a graph showing an example of a frequency pattern of a signal set in the traveling position and traveling speed detection device shown in FIG.

【図4】従来において、導管内を走行するピグの走行位
置を把握するための手段の一例を示す模式的な説明図で
ある。
FIG. 4 is a schematic explanatory view showing an example of conventional means for grasping a traveling position of a pig traveling in a conduit.

【符号の説明】 10 ピグ 11 導管 12 信号設定手段 13 信号発生器 14 送信器 15 受信器 16 速度位置導出手段 17 格納手段 18 比較手段[Explanation of Codes] 10 Pig 11 Conduit 12 Signal Setting Means 13 Signal Generator 14 Transmitter 15 Receiver 16 Speed Position Deriving Means 17 Storage Means 18 Comparing Means

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 FI 技術表示箇所 // G01N 29/26 501 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display part // G01N 29/26 501

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 導管内を走行させるようにしたピグに
おいて、信号を発振する時間間隔と、時間間隔ごとの信
号の周波数をあらかじめ設定するための信号設定手段
と、信号設定手段に基づいて信号を発生する信号発生器
と、その信号を受信側に送信する送信器とを備え、前記
受信側において、送信器からの信号を受信する受信器
と、この受信信号によりピグの走行速度および走行位置
を求める速度位置導出手段とを有し、この速度位置導出
手段は、ピグにおける信号設定手段による設定した信号
と同信号を格納する格納手段と、この格納手段からの信
号と前記受信信号とを比較照合する比較手段とを備え、
前記ピグの送信器から設定にかかる信号を受信側の受信
器に送信する一方、前記速度位置導出手段における格納
手段から同期的に前記設定にかかる信号と同信号を比較
手段に送出し、その受信信号と格納手段からの信号とを
比較照合して遅れ時間を求め、信号の遅れ時間と電波の
速度とから走行速度および走行位置を求める構成とした
ことを特徴とするピグの走行位置および走行速度検出装
置。
1. In a pig adapted to run in a conduit, a time interval for oscillating a signal, a signal setting means for setting a frequency of the signal for each time interval in advance, and a signal based on the signal setting means. A signal generator for generating and a transmitter for transmitting the signal to a receiving side are provided, and at the receiving side, a receiver for receiving a signal from the transmitter, and a traveling speed and a traveling position of a pig by the received signal. A speed position deriving unit for obtaining the speed position is provided, and the speed position deriving unit compares the signal set by the signal setting unit in the pig with the same signal, and compares the signal from the storing unit with the received signal. And a comparison means to
While transmitting the setting signal from the pig transmitter to the receiver on the receiving side, the storing unit in the velocity position deriving unit synchronously sends the setting signal and the same signal to the comparing unit and receives the signal. The traveling position and traveling speed of a pig characterized in that the signal and the signal from the storage means are compared and collated to obtain the delay time, and the traveling speed and traveling position are obtained from the signal delay time and the speed of the radio wave. Detection device.
JP6239086A 1994-10-03 1994-10-03 Detecting device of traveling position and traveling speed of pig Pending JPH08105905A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6239086A JPH08105905A (en) 1994-10-03 1994-10-03 Detecting device of traveling position and traveling speed of pig

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6239086A JPH08105905A (en) 1994-10-03 1994-10-03 Detecting device of traveling position and traveling speed of pig

Publications (1)

Publication Number Publication Date
JPH08105905A true JPH08105905A (en) 1996-04-23

Family

ID=17039620

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6239086A Pending JPH08105905A (en) 1994-10-03 1994-10-03 Detecting device of traveling position and traveling speed of pig

Country Status (1)

Country Link
JP (1) JPH08105905A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002195817A (en) * 2000-12-26 2002-07-10 Tokyo Gas Co Ltd Method for switching measurement of in-pipe traveling device
US9535039B2 (en) 2014-04-30 2017-01-03 Control Devices, Inc. Acoustic transmitter and method for underwater pipeline inspection gauges
JP2017510449A (en) * 2014-01-06 2017-04-13 ウレッシュ アーゲーUresh Ag Aseptic duct pig with identification means
JP2018519153A (en) * 2015-06-29 2018-07-19 アイゼンマン ソシエタス オイロペア Pigs and coating equipment for coating equipment
CN109143216A (en) * 2018-09-12 2019-01-04 中国石油天然气股份有限公司 Pipe cleaner detector

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002195817A (en) * 2000-12-26 2002-07-10 Tokyo Gas Co Ltd Method for switching measurement of in-pipe traveling device
JP2017510449A (en) * 2014-01-06 2017-04-13 ウレッシュ アーゲーUresh Ag Aseptic duct pig with identification means
US10753525B2 (en) 2014-01-06 2020-08-25 Uresh Ag Aseptic pipeline pig with identification means
US9535039B2 (en) 2014-04-30 2017-01-03 Control Devices, Inc. Acoustic transmitter and method for underwater pipeline inspection gauges
JP2018519153A (en) * 2015-06-29 2018-07-19 アイゼンマン ソシエタス オイロペア Pigs and coating equipment for coating equipment
US11149897B2 (en) 2015-06-29 2021-10-19 Eisenmann Se Pig for a coating device, and coating system
CN109143216A (en) * 2018-09-12 2019-01-04 中国石油天然气股份有限公司 Pipe cleaner detector

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