JP2010085306A - Dirt prevention apparatus of interface level meter - Google Patents

Dirt prevention apparatus of interface level meter Download PDF

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JP2010085306A
JP2010085306A JP2008256168A JP2008256168A JP2010085306A JP 2010085306 A JP2010085306 A JP 2010085306A JP 2008256168 A JP2008256168 A JP 2008256168A JP 2008256168 A JP2008256168 A JP 2008256168A JP 2010085306 A JP2010085306 A JP 2010085306A
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vibrator
amplifier
cleaning
measurement
signal
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Mitsugi Sano
貢 佐野
Naotaka Matsushita
尚孝 松下
Tonshaku To
敦灼 董
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Honda Electronics Co Ltd
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Honda Electronics Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem wherein circuits are complicated by needing a gate circuit for switching a measuring signal and a cleaning signal to each other. <P>SOLUTION: A dirt prevention apparatus includes: connecting the input terminal of a first amplifier 13 to the output terminal of a control device 12; connecting a cleaning vibrator 14 to the output terminal of the first amplifier 13; connecting the input terminal of a second amplifier 15 to the output terminal of the control device 12; connecting a measuring vibrator 16 to the output terminal of the second amplifier 15; connecting the input terminal of a third amplifier 17 to the measuring vibrator 16; in addition, allowing the output terminal of the third amplifier 17 to connect the control device 12; mounting the ring-like measuring vibrator 16 to the inner bottom part of a sensor case 18; and mounting the cleaning vibrator 14 to the hole of the center of the ring-like measuring vibrator 16. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、沈殿層などの沈殿物の深さを検出する界面レベル計の汚れを防止する界面レベル計の汚れ防止装置に関するものである。   The present invention relates to a contamination preventing device for an interface level meter that prevents contamination of an interface level meter that detects the depth of a precipitate such as a sediment layer.

沈殿層１の液体２の沈殿物３の層を検出する超音波センサ４に通常の増幅度を有する第１の増幅器６及び第１の増幅器６の増幅度の数倍の増幅度を有する第２の増幅器７の出力端子が接続され、この第１，第２の増幅器６，７の入力側に第１の増幅器６又は第２の増幅器７を選択する第１のゲート８が接続され、さらに、第１のケート８に発振器９が接続され、又、第１，第２の増幅器の６，７の出力側に第２のゲート１０を介して出力端子ａが接続され、さらに、制御装置１１は発振器９の出力、第１のゲート８及び第２のゲート１０の切り換えを制御するように接続されている。     The ultrasonic sensor 4 for detecting the layer 3 of the precipitate 2 in the liquid 2 of the precipitation layer 1 has a normal amplification factor and a second amplification factor several times the amplification factor of the first amplifier 6. An output terminal of the first amplifier 6 is connected to a first gate 8 for selecting the first amplifier 6 or the second amplifier 7; and An oscillator 9 is connected to the first gate 8, and an output terminal a is connected to the output sides of the first and second amplifiers 6 and 7 via a second gate 10. The output of the oscillator 9 is connected to control the switching of the first gate 8 and the second gate 10.

このように構成された従来の界面レベル計の汚れ防止装置では、制御装置１１からの信号で発振器９を動作してパルス信号を出力すると、発振器９からのパルス信号は通常の計測のための増幅度を有する第１の増幅器６で増幅され、増幅されたパルス信号は超音波センサ４に入力され、それと同時に、制御装置１１に内蔵されたタイマがセットされ、超音波波振動子４で発生した超音波は沈殿槽１の沈殿物３で反射され、第２のゲート１０を介して出力端子ａから計測装置へ送信され、制御装置１１のタイマがタイムアップされるまで継続し、タイムアップされると、第１のゲート８を第２の増幅器７に接続し、第２のゲート１０を遮断し、発振器９からのパルス信号は増幅器７で通常の数倍の増幅度で増幅され、この強力なパルス信号は超音波センサ４に入力され、この強力なパルス信号で超音波センサ４が励振され、超音波センサ４の発射面に付着している汚れを超音波励振して除去することができる。   In the conventional interface level meter antifouling device configured as described above, when the oscillator 9 is operated by a signal from the control device 11 to output a pulse signal, the pulse signal from the oscillator 9 is amplified for normal measurement. The amplified pulse signal is input to the ultrasonic sensor 4, and at the same time, a timer built in the control device 11 is set and generated by the ultrasonic wave transducer 4. The ultrasonic wave is reflected by the sediment 3 in the sedimentation tank 1 and transmitted from the output terminal a to the measuring device via the second gate 10 and continues until the timer of the control device 11 is timed up. Then, the first gate 8 is connected to the second amplifier 7, the second gate 10 is cut off, and the pulse signal from the oscillator 9 is amplified by the amplifier 7 with a normal amplification factor of several times. Pulse signal is super Is input to the wave sensor 4, this powerful a pulse signal the ultrasonic sensor 4 is excited, the dirt adhering to the firing surface of the ultrasonic sensor 4 can be removed by exciting ultrasound.

しかしながら、従来の界面レベル計の汚れ防止装置では、１つの超音波センサ４によって計測と洗浄を行っているので、計測用の信号と洗浄用の信号を切り換えるためのゲート回路を必要とし、回路が複雑になるという問題がある。
特開平９−３１８４２１ However, in the conventional interface level meter antifouling device, since measurement and cleaning are performed by one ultrasonic sensor 4, a gate circuit for switching between the measurement signal and the cleaning signal is required. There is a problem of complexity.
JP-A-9-318421

解決しようとする問題点は、計測用の信号と洗浄用の信号を切り換えるためのゲート回路を必要とし、回路が複雑になるという問題があった。   The problem to be solved is that a gate circuit for switching between a measurement signal and a cleaning signal is required, and the circuit becomes complicated.

本発明は、沈殿槽に装着されるセンサケースと、該センサケース内に装着した計測用振動子及び洗浄用振動子と、該洗浄用振動子が接続される第１の増幅器と、前記計測用振動子が接続される第２の増幅器及び第３の増幅器と、前記第１の増幅器に洗浄用信号を出力し、第２の増幅器に計測用信号を出力し、第３の増幅器で計測用振動子からの信号を増幅して入力する制御装置と、前記第１の増幅器によって出力された洗浄用信号を前記洗浄用振動子に入力して自動洗浄するものであり、又、前記センサケースに装着される洗浄用振動子はリング状に形成された計測用振動子の中心孔に装着されるものであり、さらに、 前記センサケースに装着される洗浄用振動子と計測用振動子は円盤状に形成され、重ねて前記センサケース内に装着されるものである。   The present invention includes a sensor case mounted in a sedimentation tank, a measurement vibrator and a cleaning vibrator mounted in the sensor case, a first amplifier to which the cleaning vibrator is connected, and the measurement The second amplifier and the third amplifier to which the vibrator is connected, the cleaning signal is output to the first amplifier, the measurement signal is output to the second amplifier, and the measurement vibration is output by the third amplifier. A control device for amplifying and inputting a signal from a child, and a cleaning signal output by the first amplifier is input to the cleaning vibrator for automatic cleaning, and is attached to the sensor case. The cleaning vibrator is attached to the center hole of the measurement vibrator formed in a ring shape, and the cleaning vibrator and the measurement vibrator attached to the sensor case are disc-shaped. Formed and stacked in the sensor case It is intended.

本発明の界面レベル計の汚れ防止装置は、洗浄用振動子と計測用振動子を別に構成し、１つのセンサケースに装着することにより、ゲート回路を必要とせず、回路構成が簡単になるという利点がある。   According to the present invention, the interface level meter antifouling device has a cleaning vibrator and a measurement vibrator separately and is attached to one sensor case, so that a gate circuit is not required and the circuit configuration is simplified. There are advantages.

本発明では、計測用振動子及び洗浄用振動子とがセンサケースに装着されて沈殿槽に設置され、第１の増幅器に洗浄用振動子が接続され、第２の増幅器及び第３の増幅器に計測用振動子が接続され、制御装置によって、第１の増幅器に洗浄用信号を出力し、第２の増幅器に計測用信号を出力し、第３の増幅器で計測用振動子からの信号を増幅して制御装置に入力し、第１の増幅器によって出力された洗浄用信号を洗浄用振動子に入力して自動洗浄するものである。   In the present invention, the measurement vibrator and the washing vibrator are attached to the sensor case and installed in the sedimentation tank, the washing vibrator is connected to the first amplifier, and the second amplifier and the third amplifier are connected. A measurement vibrator is connected, and a control device outputs a cleaning signal to the first amplifier, a measurement signal to the second amplifier, and a third amplifier amplifies the signal from the measurement vibrator Then, the signal is input to the control device, and the cleaning signal output by the first amplifier is input to the cleaning vibrator for automatic cleaning.

図１は本発明の実施例の界面レベル計の汚れ防止装置のブロック図で、制御装置１２の出力端子に第1の増幅器１３の入力端子が接続され、この第１の増幅器１３の出力端子に洗浄用振動子１４が接続され、又、制御装置１２の出力端子に第２の増幅器１５の入力端子が接続され、第２の増幅器１５の出力端子に計測用振動子１６が接続され、さらに、計測用振動子１６に第３の増幅器１７の入力端子が接続され、又、第３の増幅器１７の出力端子は制御装置１２が接続されており、又、図２及び図３に示すように、センサケース１８の内底部にリング状の計測用振動子１６が装着され、リング状の計測用振動子１６の中心の孔に洗浄用振動子１４が装着されている。   FIG. 1 is a block diagram of a contamination prevention device for an interface level meter according to an embodiment of the present invention. An input terminal of a first amplifier 13 is connected to an output terminal of a control device 12, and an output terminal of the first amplifier 13 is connected to the output terminal. The cleaning vibrator 14 is connected, the input terminal of the second amplifier 15 is connected to the output terminal of the control device 12, the measurement vibrator 16 is connected to the output terminal of the second amplifier 15, The measurement amplifier 16 is connected to the input terminal of the third amplifier 17, and the output terminal of the third amplifier 17 is connected to the control device 12, and as shown in FIGS. 2 and 3, A ring-shaped measurement vibrator 16 is attached to the inner bottom portion of the sensor case 18, and a cleaning vibrator 14 is attached to the center hole of the ring-shaped measurement vibrator 16.

このように構成された本実施例の界面レベル計の汚れ防止装置では、制御装置１２を駆動して、第２の増幅器１５に計測用信号を出力すると、第２の増幅器１５で計測用信号が増幅され、計測用振動子１６に入力されると、計測用振動子１６から照射された超音波が沈殿槽内の液体に照射され、沈殿槽内の沈殿物３で反射され、再び計測用振動子１６に入力されるので、第３の増幅器１７で増幅されて制御装置１２に入力され、計測用振動子１６から沈殿物までの深さが計測される。   In the interface level meter contamination preventing apparatus of this embodiment configured as described above, when the control device 12 is driven and a measurement signal is output to the second amplifier 15, the measurement signal is output from the second amplifier 15. When amplified and input to the measurement vibrator 16, the ultrasonic wave irradiated from the measurement vibrator 16 is irradiated to the liquid in the precipitation tank, reflected by the sediment 3 in the precipitation tank, and again measured vibration. Since it is input to the child 16, it is amplified by the third amplifier 17 and input to the control device 12, and the depth from the measuring vibrator 16 to the deposit is measured.

ここで、制御装置１に装着されたタイマで予め決められた時間が経過すると、制御装置１２から第１の増幅器１３に洗浄用信号が出力されるので、第１の増幅器１３で洗浄用信号が増幅されて洗浄用振動子１４に入力されることにより、洗浄用振動子１４から強力な超音波が発生し、センサケース１８の外面に付着した汚れを除去することができる。     Here, when a predetermined time elapses with a timer attached to the control device 1, a cleaning signal is output from the control device 12 to the first amplifier 13, so that the cleaning signal is output from the first amplifier 13. By being amplified and input to the cleaning vibrator 14, powerful ultrasonic waves are generated from the cleaning vibrator 14, and the dirt attached to the outer surface of the sensor case 18 can be removed.

図４は本発明の他の実施例の界面レベル計の汚れ防止装置に使用されるセンサケースの側面断面図で、１４は洗浄用振動子、１６は計測用振動子、１８はセンサケースで、これらの構成は上記実施例と同じであるが、本実施例では、洗浄用振動子１４と計測用振動子１６はそれぞれ円盤状に構成され、洗浄用振動子１４の上に計測用振動子１６が積層されて、センサケース１８の内底部に装着されている。   FIG. 4 is a side cross-sectional view of a sensor case used in an anti-contamination device for an interface level meter according to another embodiment of the present invention, wherein 14 is a cleaning vibrator, 16 is a measurement vibrator, and 18 is a sensor case. Although these configurations are the same as those in the above embodiment, in this embodiment, the cleaning vibrator 14 and the measurement vibrator 16 are each formed in a disk shape, and the measurement vibrator 16 is disposed on the cleaning vibrator 14. Are stacked and attached to the inner bottom of the sensor case 18.

このように構成された本実施例の界面レベル計の汚れ防止装置でも前記実施例と同様の効果をえることができる。   The same effect as that of the above-described embodiment can be obtained even in the contamination preventing device for the interface level meter of this embodiment configured as described above.

なお、上記実施例では、計測用振動子と洗浄用振動子を逆に装着しても同様の効果をえることがことができる。   In the above embodiment, the same effect can be obtained even if the measurement vibrator and the washing vibrator are mounted in reverse.

本発明の実施例の界面レベル計の汚れ防止装置のブロック図である。It is a block diagram of the contamination prevention apparatus of the interface level meter of the Example of this invention. 本発明の実施例の界面レベル計の汚れ防止装置のセンサケースの側面断面図である。It is side surface sectional drawing of the sensor case of the stain | pollution | contamination prevention apparatus of the interface level meter of the Example of this invention. 図２のセンサケースの平面図である。It is a top view of the sensor case of FIG. 本発明の他の実施例の界面レベル計の汚れ防止装置のセンサケースの側面断面図である。It is side surface sectional drawing of the sensor case of the stain | pollution | contamination prevention apparatus of the interface level meter of the other Example of this invention. 従来の界面レベル計の汚れ防止装置のブロック図である。It is a block diagram of the antifouling device of the conventional interface level meter.

符号の説明Explanation of symbols

１２ 制御装置
１３ 第１の増幅器
１４ 洗浄用振動子
１５ 第２の増幅器
１６ 計測用振動子
１７ 第２の増幅器
１８ センサケース DESCRIPTION OF SYMBOLS 12 Control apparatus 13 1st amplifier 14 Cleaning vibrator 15 2nd amplifier 16 Measuring vibrator 17 2nd amplifier 18 Sensor case

Claims (3)

沈殿槽に装着されるセンサケースと、該センサケース内に装着した計測用振動子及び洗浄用振動子と、該洗浄用振動子が接続される第１の増幅器と、前記計測用振動子が接続される第２の増幅器及び第３の増幅器と、前記第１の増幅器に洗浄用信号を出力し、第２の増幅器に計測用信号を出力し、第３の増幅器で計測用振動子からの信号を増幅して入力する制御装置と、前記第１の増幅器によって出力された洗浄用信号を前記洗浄用振動子に入力して自動洗浄することを特徴とする界面レベル計の汚れ防止装置。   A sensor case mounted in the sedimentation tank, a measurement vibrator and a cleaning vibrator mounted in the sensor case, a first amplifier to which the cleaning vibrator is connected, and the measurement vibrator are connected The second amplifier and the third amplifier, the cleaning signal is output to the first amplifier, the measurement signal is output to the second amplifier, and the signal from the measurement vibrator is output by the third amplifier. And a control apparatus for amplifying and inputting the signal, and a cleaning signal output from the first amplifier for inputting the cleaning signal to the cleaning vibrator for automatic cleaning. 前記センサケースに装着される洗浄用振動子はリング状に形成された計測用振動子の中心孔に装着されることを特徴とする請求項１記載の界面レベル計の汚れ防止装置。 2. The apparatus for preventing contamination of an interface level meter according to claim 1, wherein the cleaning vibrator attached to the sensor case is attached to a central hole of a measurement vibrator formed in a ring shape. 前記センサケースに装着される洗浄用振動子と計測用振動子は円盤状に形成され、重ねて前記センサケース内に装着されることを特徴とする請求項１記載の界面レベル計の汚れ防止装置。 2. The apparatus for preventing contamination of an interface level meter according to claim 1, wherein the cleaning vibrator and the measurement vibrator attached to the sensor case are formed in a disc shape and are attached to the sensor case in an overlapping manner. .
JP2008256168A 2008-10-01 2008-10-01 Dirt prevention apparatus of interface level meter Pending JP2010085306A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020027097A (en) * 2018-01-15 2020-02-20 株式会社デンソー Liquid level detection device
JP2021067656A (en) * 2019-10-28 2021-04-30 Ｊｆｅスチール株式会社 Interface measuring device, tar decanter, and interface measuring method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020027097A (en) * 2018-01-15 2020-02-20 株式会社デンソー Liquid level detection device
JP2021067656A (en) * 2019-10-28 2021-04-30 Ｊｆｅスチール株式会社 Interface measuring device, tar decanter, and interface measuring method

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