JPS5810691B2 - Ultrasonic measuring device - Google Patents
Ultrasonic measuring deviceInfo
- Publication number
- JPS5810691B2 JPS5810691B2 JP54167656A JP16765679A JPS5810691B2 JP S5810691 B2 JPS5810691 B2 JP S5810691B2 JP 54167656 A JP54167656 A JP 54167656A JP 16765679 A JP16765679 A JP 16765679A JP S5810691 B2 JPS5810691 B2 JP S5810691B2
- Authority
- JP
- Japan
- Prior art keywords
- ultrasonic
- measuring device
- present
- receiver
- circuit
- 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.)
- Expired
Links
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Description
【発明の詳細な説明】 本発明は、超音波による界面測定装置に関する。[Detailed description of the invention] The present invention relates to an ultrasonic interface measuring device.
従来から液−沈澱物（汚泥等）または懸濁液（エマルジ
ョン等）の界面の検出をする超音波による界面測定装置
は、定在波の性質のため、送受信器間の距離の変化や送
信周波数の変化によって受信感度が変化し精確な測定が
できないおそれを有していた。Conventional ultrasonic interface measurement devices that detect interfaces between liquids and sediments (sludge, etc.) or suspensions (emulsions, etc.) have been known to detect interfaces between liquids and sediments (sludge, etc.) or suspensions (emulsions, etc.). There was a risk that the reception sensitivity would change due to changes in the signal, making it impossible to make accurate measurements.
本発明者は、超音波の送受信間の距離や送信周波数が多
少変化しても受信感度が変化しない超音波レベル計につ
いて種々研究の結果、本発明を達成したのである。The present inventor has achieved the present invention as a result of various research into an ultrasonic level meter in which the receiving sensitivity does not change even if the distance between transmitting and receiving ultrasonic waves or the transmitting frequency changes slightly.
本発明は、一つの周波数に頼らず広範囲の周波数、即ち
送信周波数を周期的に変化させて、検出し、その最大値
を受信器とすることによって、波。The present invention does not rely on one frequency, but periodically changes a wide range of frequencies, that is, the transmission frequency, detects the waves, and uses the maximum value as the receiver.
の性質の影響を受けることなくして、誤差なく安定した
測定ができる超音波による界面測定装置（超音波レベル
計）を提供することを目的とする。An object of the present invention is to provide an ultrasonic interface measuring device (ultrasonic level meter) that can perform stable measurements without errors without being affected by the properties of the ultrasonic level meter.
本発明は、超音波の送信器と受信器とをある距離をおい
て相対向させた超音波検出器部と、該検出器部に加える
送信周波数をある一定期間をもって、ある一定範囲で送
信周波数を連続的に、くり返して変化させる周波数変調
回路と、多種の受信信号の中から常に最大のものを選択
使用する整流回路とから成る超音波による界面測定装置
である。The present invention includes an ultrasonic detector section in which an ultrasonic transmitter and a receiver are opposed to each other at a certain distance, and a transmission frequency applied to the detector section within a certain range over a certain period of time. This ultrasonic interface measuring device consists of a frequency modulation circuit that continuously and repeatedly changes the frequency, and a rectifier circuit that always selects and uses the largest one from among a variety of received signals.
超音波による界面測定装置は、発信器と受信器との間に
介在する物の物理的性質によって、発信器から発射され
た超音波と受信器で受信された超音波との減衰の度合が
異なり、その差をとらえることによって、発信器と受信
器との間に介在する物、例えば懸濁液の界面が検出され
るのである。In an ultrasonic interface measurement device, the degree of attenuation between the ultrasonic waves emitted from the transmitter and the ultrasonic waves received by the receiver differs depending on the physical properties of the object intervening between the transmitter and receiver. , by capturing the difference, the interface of an object intervening between the transmitter and the receiver, such as a suspension, can be detected.
例えば、レベル計の検出器部が水中にあるときは超音波
の伝りが良で受信感度が犬となり、懸濁液中や空中にあ
るとき超音波の伝りが悪く受信感度が小となるのである
。For example, when the detector section of a level meter is underwater, the ultrasonic waves propagate well and the reception sensitivity is low; when it is in suspension or in the air, the ultrasonic waves propagate poorly and the reception sensitivity is low. It is.
次に、本発明の実施態様を記載する。Next, embodiments of the invention will be described.
図面は、本発明の正面図、第２図は本発明の波形図、第
３図は本発明の電子回路のフ宅ツク図、第４図は本発明
の使用状態の説明図、を示す。The drawings are a front view of the present invention, FIG. 2 is a waveform diagram of the present invention, FIG. 3 is a block diagram of the electronic circuit of the present invention, and FIG. 4 is an explanatory diagram of the state of use of the present invention.
図中、第１図において、１は超音波送信器部、２は超音
波受信器部、３は送信器部１と受信器部２とを、互に対
向して、上下または左右に、一定間隔ｌに保持する検出
部材の、ケーシング４への取付蔀、４は電子回路部が収
納されたケーシング、を示し、第３図において、６は周
波数変調回路、７は発信回路、８は送信回路、９は受信
回路、１０は整流回路、１１は出力回路、１２は出力接
点、を示す。In the figure, in FIG. 1, 1 is an ultrasonic transmitter section, 2 is an ultrasonic receiver section, and 3 is a transmitter section 1 and a receiver section 2, which are arranged vertically or horizontally, facing each other, at a fixed angle. 4 is a casing in which an electronic circuit is housed, and 6 is a frequency modulation circuit, 7 is an oscillation circuit, and 8 is a transmission circuit. , 9 is a receiving circuit, 10 is a rectifier circuit, 11 is an output circuit, and 12 is an output contact.
本発明によれば、被検出物にレベル計を装置することに
よって、多種の定在波（第２図の４２０゜ハ参照）を一
定周期をもって連続的に変化させてつくる周波数変調回
路（その周期には電源周波数５０または６０Ｈｚを利用
するのが好ましい）と多種周波数の受信信号から常に最
大のものを選択検出する整流回路とを備えていることに
より、ｌまたは周波数の変化があっても、互に補い合う
ことで受信感度の変化が起らず、即ちできるだけ多くの
異なった周波数を使用しているため、何れかの定在波の
最大値（第２図酬こみられるように振動（振幅）最大の
部分が受信器の受信面に当る）が選択検知されるので、
平均的には常に一定の感度が得られて安定した測定値が
得られるのである。According to the present invention, by installing a level meter on the object to be detected, a frequency modulation circuit (its period (It is preferable to use a power supply frequency of 50 or 60 Hz for By complementing each other, there is no change in reception sensitivity, that is, by using as many different frequencies as possible, the maximum value of any standing wave (as shown in Figure 2), the maximum vibration (amplitude) (the part that hits the receiving surface of the receiver) is selectively detected, so
On average, a constant sensitivity is always obtained and stable measurement values can be obtained.
本発明は、燃料油、潤滑油、ペイント、ラッカ、インキ
、飲料、ローション、油水混液、貯水等液体中に挾雑物
などが混在するものの界面検出に有効に使用されるもの
である。INDUSTRIAL APPLICABILITY The present invention is effectively used for detecting the interface of liquids such as fuel oil, lubricating oil, paint, lacquer, ink, beverage, lotion, oil/water mixture, and stored water that contain foreign substances.
図面は、本発明の一実施例を示すもので、第１図は本発
明の正面図、第２図は本発明の波形図、第３図は本発明
の電子回路のブロック図、を示す。The drawings show an embodiment of the present invention; FIG. 1 shows a front view of the invention, FIG. 2 shows a waveform diagram of the invention, and FIG. 3 shows a block diagram of an electronic circuit of the invention.
Claims (1)
対向して設けられた超音波検出器を備えた超音波による
界面測定器において、周波数変調回路と整流回路とを備
えて成り、一定周期をもって多数の周波数を多種の定在
波を発信させ、該送信周波の最大値を選択受信して安定
した測定を可態にしたことを特徴とする超音波測定装置
。1. An ultrasonic interface measuring device equipped with an ultrasonic detector in which an ultrasonic transmitter and a receiver are placed facing each other at a desired distance, which comprises a frequency modulation circuit and a rectification circuit. An ultrasonic measuring device characterized by transmitting various types of standing waves at a large number of frequencies at a constant period, and selectively receiving the maximum value of the transmitted frequencies to enable stable measurement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54167656A JPS5810691B2 (en) | 1979-12-25 | 1979-12-25 | Ultrasonic measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54167656A JPS5810691B2 (en) | 1979-12-25 | 1979-12-25 | Ultrasonic measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5690215A JPS5690215A (en) | 1981-07-22 |
| JPS5810691B2 true JPS5810691B2 (en) | 1983-02-26 |
Family
ID=15853793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP54167656A Expired JPS5810691B2 (en) | 1979-12-25 | 1979-12-25 | Ultrasonic measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5810691B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6137081A (en) * | 1984-07-30 | 1986-02-21 | Yoshikawa Shokuhin Kogyo Kk | Method for removing oil of raw fried bean curd and device therefor |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6479620A (en) * | 1987-09-22 | 1989-03-24 | Naoyuki Omatoi | Ultrasonic liquid-level meter |
| US5251482A (en) * | 1990-07-16 | 1993-10-12 | Hughes Aircraft Company | Low frequency acoustic fuel sensor |
| JP2854423B2 (en) * | 1991-02-15 | 1999-02-03 | 株式会社カイジョー | Interface device for suspended foreign matter |
| DE19927865B4 (en) † | 1999-05-07 | 2005-12-01 | Leuze Electronic Gmbh & Co Kg | Device for detecting objects |
-
1979
- 1979-12-25 JP JP54167656A patent/JPS5810691B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6137081A (en) * | 1984-07-30 | 1986-02-21 | Yoshikawa Shokuhin Kogyo Kk | Method for removing oil of raw fried bean curd and device therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5690215A (en) | 1981-07-22 |
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