JPH02291937A - Valve leakage detection - Google Patents
Valve leakage detectionInfo
- Publication number
- JPH02291937A JPH02291937A JP11245589A JP11245589A JPH02291937A JP H02291937 A JPH02291937 A JP H02291937A JP 11245589 A JP11245589 A JP 11245589A JP 11245589 A JP11245589 A JP 11245589A JP H02291937 A JPH02291937 A JP H02291937A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- detected
- leakage
- ultrasonic waves
- leaks
- 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
Links
Landscapes
- Examining Or Testing Airtightness (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
産業上の利用分野
本発明は水道用バルブ等のバルブの漏れ検出方法に関す
るものである．
従来の技術
従来、水道用バルブの漏れを検出する方法としては、音
聴棒を用いる方法が知られている。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for detecting leaks in valves such as water valves. 2. Description of the Related Art Conventionally, a method using a listening rod is known as a method for detecting leakage in water valves.
又、水道管路からの漏れを検出する方法としては、加速
度ピックアップを用いた漏水探知器も一最に知られてい
る．
発明が解決しようとする課題
ところが、水道用バルブの全閉時の漏れの有無を音聰棒
により検出するには、熟練が必要であるという問題があ
り、また可聴域の周波数帯の音による検出であるなめ、
可聴域の漏水音を発生しないような微少な、漏れの検出
は行えないという問題がある．
また、加速度ピックアップを用いた漏水探知器は、水道
管路における漏水による振動を検出するものであり、水
道用バルブの全閉時の漏れにより発生する微弱な振動を
検出するのは困難であり、かつ発生する音または振動が
バルブの形式や口径によって異なるためにバルブの漏れ
検出に適用することはできない。Additionally, water leak detectors using acceleration pickups are the most well-known method for detecting leaks from water pipes. Problems to be Solved by the Invention However, there is a problem in that skill is required to detect the presence or absence of leakage when a water valve is fully closed using a sound rod. Name that is,
The problem is that it is not possible to detect small leaks that do not produce audible leak sounds. In addition, water leak detectors that use acceleration pickups detect vibrations caused by water leaks in water pipes, and it is difficult to detect the weak vibrations that occur due to leaks when water valves are fully closed. Moreover, the generated sound or vibration varies depending on the type and diameter of the valve, so it cannot be applied to valve leak detection.
本発明は、上記従来の問題点に鑑み、特別な熟練技術を
要せずに容易にバルブの全閉時の漏れを微少な漏れにつ
いても検出することができるバルブの漏れ検出方法を提
供することを目的とするものである．
課題を解決するための手段
本発明は、上記問題点を解決するために、検出対象のバ
ルブの適当箇所にセンサを接触させてバルブから発生す
る超音波を検出し、その超音波の周波数分布特性を分析
し、予め検出して記憶されているバルブの漏れ時に発生
する超音波の周波数分布特性データと比較し、漏れの有
無を検出することを特徴とする。In view of the above conventional problems, the present invention provides a valve leak detection method that can easily detect even minute leaks when the valve is fully closed without requiring special skill. The purpose is to Means for Solving the Problems In order to solve the above-mentioned problems, the present invention detects the ultrasonic waves generated from the valve by bringing a sensor into contact with an appropriate part of the valve to be detected, and detects the frequency distribution characteristics of the ultrasonic waves. The present invention is characterized in that the presence or absence of leakage is detected by comparing the frequency distribution characteristic data of the ultrasonic waves generated when a valve leaks, which has been detected and stored in advance, with the data analyzed.
作用
上記構成によれば、漏水によって発生する超音波をセン
サにて検出し、その周波数分析を行って周波数一強度分
布特性を得、一方漏れにより発生する超音波の周波数一
強度分布特性をバルブ形式やバルブ口径毎に予め検出し
ておくことによって、上記得られた検出データと比鮫す
ることにより漏れを確実に検出でき、さらに超音波を用
いているので、可聴域の漏れ音を発生しないような微少
な漏れら検出することができる．
実施例
以下、本発明の一実施例を図面に基づいて説明する．
１は、漏れ検出を行う対象のバルブであり、その弁棒２
にＸ１着されたバルブ開閉用のキャップ３の上端にセン
サ４を接触させる。センサ４は、バルブ１の全閉時にそ
の漏れにより発生した超音波を検出して電気信号に変換
する。センサ４にて検出した信号は増幅回路にて増幅し
、検出した超音波の周波数分析を行い、計測データの周
波数分布′特性を得る．
一方、予め各種形式及び口径のバルブにおける漏れ発生
時に出る超音波の周波数分布特性を検出してその周波数
分布特性データをＲＯＭまたはＲＡＭに記憶しておき、
バルブの形式及び口径を指示すると、そのバルブの漏れ
発生時の超音波の周波数分布特性を読み出すことができ
るようにしておく．
そして、上記検出対象のバルブ１のバルブ形式及び口径
に関するデータを入力して前記ＲＯＭ又はＲＡＭに記憶
されているデータを読み出すことにより比較データを得
、次に上記計測データとこの比較データを比較すること
によってそのバルブ１の漏れの有無を判断し、その結果
を表示する．以上のように、本実施例によると、検出対
象のバルブ１のバルブ形式及び口径に関するデータを入
力するとともに、センサ４をバルブ１のキャップ３の上
端に接触させるという極めて簡単な作業でそのバルブ１
の漏れの有無を検出することができる。Effect According to the above configuration, the ultrasonic waves generated by water leakage are detected by the sensor, and their frequency is analyzed to obtain the frequency-intensity distribution characteristics, while the frequency-intensity distribution characteristics of the ultrasonic waves generated by the leakage are detected in the form of a valve. By detecting each valve diameter in advance and comparing it with the detection data obtained above, leaks can be detected reliably.Furthermore, since ultrasonic waves are used, leakage noise in the audible range can be avoided. It is possible to detect even the smallest leaks. EXAMPLE Hereinafter, an example of the present invention will be explained based on the drawings. 1 is a valve to be detected for leakage, and its valve stem 2
The sensor 4 is brought into contact with the upper end of the cap 3 for opening and closing the valve, which is attached to the X1. The sensor 4 detects ultrasonic waves generated by leakage when the valve 1 is fully closed, and converts it into an electrical signal. The signal detected by the sensor 4 is amplified by an amplifier circuit, and the frequency of the detected ultrasonic wave is analyzed to obtain the frequency distribution' characteristics of the measurement data. On the other hand, the frequency distribution characteristics of ultrasonic waves emitted when leakage occurs in valves of various types and diameters are detected in advance, and the frequency distribution characteristics data is stored in ROM or RAM.
By specifying the type and diameter of the valve, it is possible to read out the frequency distribution characteristics of the ultrasonic waves when a leak occurs in that valve. Comparison data is obtained by inputting data regarding the valve type and diameter of the valve 1 to be detected and reading the data stored in the ROM or RAM, and then comparing the measurement data and this comparison data. By this, it is determined whether or not there is a leak in the valve 1, and the result is displayed. As described above, according to this embodiment, data regarding the valve type and diameter of the valve 1 to be detected can be inputted, and the valve 1 can be
The presence or absence of leakage can be detected.
発明の効果
本発明のバルブの漏れ検出方法によれば、以上のように
漏水によって発生する超音波をセンサにて検出してその
周波数分析を行い、予め検出されているバルブ形式や口
径毎の周波数分布特性データと比較することにより漏れ
を確実に検出でき、さらに超音波を用いているので、可
聴域の漏れ音を発生しないような微少な漏れも検出する
ことができ、従って特別な熟練技術を要せずに容易にバ
ルブの全開時の漏れを微少な漏れについても検出するこ
とができるという大なる効果を発揮する．Effects of the Invention According to the valve leakage detection method of the present invention, as described above, ultrasonic waves generated by water leakage are detected by a sensor, and their frequency is analyzed. Leakage can be reliably detected by comparing it with distribution characteristic data, and since ultrasonic waves are used, even minute leaks that do not produce audible leakage noise can be detected. It has the great effect of being able to easily detect even minute leaks when the valve is fully open, without the need for a full-open valve.
第１図は本発明にかかるバルブの漏れ検出方法の一実施
例の動作説明図である。
１・・・バルブ、２・・・弁棒、３・・・キャップ、４
・・・センサ．
代理人 森 本 義 弘FIG. 1 is an explanatory diagram of the operation of an embodiment of the valve leak detection method according to the present invention. 1...Valve, 2...Valve stem, 3...Cap, 4
...Sensor. Agent Yoshihiro Morimoto
Claims (1)
バルブから発生する超音波を検出し、その超音波の周波
数分布特性を分析し、予め検出して記憶されているバル
ブの漏れ時に発生する超音波の周波数分布特性データと
比較し、漏れの有無を検出することを特徴とするバルブ
の漏れ検出方法。1. Detect the ultrasonic waves generated by the valve by touching the sensor to an appropriate location on the valve to be detected, analyze the frequency distribution characteristics of the ultrasonic waves, and detect the leakage of the valve that has been detected and stored in advance. A method for detecting leakage in a valve, characterized by detecting the presence or absence of a leak by comparing it with frequency distribution characteristic data of ultrasonic waves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11245589A JPH02291937A (en) | 1989-05-01 | 1989-05-01 | Valve leakage detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11245589A JPH02291937A (en) | 1989-05-01 | 1989-05-01 | Valve leakage detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02291937A true JPH02291937A (en) | 1990-12-03 |
Family
ID=14587067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11245589A Pending JPH02291937A (en) | 1989-05-01 | 1989-05-01 | Valve leakage detection |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02291937A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005214666A (en) * | 2004-01-27 | 2005-08-11 | Japan Nuclear Cycle Development Inst States Of Projects | Leak detection apparatus and method |
| WO2014017305A1 (en) * | 2012-07-23 | 2014-01-30 | 株式会社フジキン | Leak detection device, and fluid controller having same |
| US10641412B2 (en) | 2012-09-28 | 2020-05-05 | Rosemount Inc. | Steam trap monitor with diagnostics |
-
1989
- 1989-05-01 JP JP11245589A patent/JPH02291937A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005214666A (en) * | 2004-01-27 | 2005-08-11 | Japan Nuclear Cycle Development Inst States Of Projects | Leak detection apparatus and method |
| WO2014017305A1 (en) * | 2012-07-23 | 2014-01-30 | 株式会社フジキン | Leak detection device, and fluid controller having same |
| JP2014021029A (en) * | 2012-07-23 | 2014-02-03 | Fujikin Inc | Leakage detector and fluid controller having the same |
| US9702781B2 (en) | 2012-07-23 | 2017-07-11 | Fujikin Incorporated | Leakage detection device and fluid controller including same |
| US10641412B2 (en) | 2012-09-28 | 2020-05-05 | Rosemount Inc. | Steam trap monitor with diagnostics |
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