JPH0421921U - - Google Patents
Info
- Publication number
- JPH0421921U JPH0421921U JP6323090U JP6323090U JPH0421921U JP H0421921 U JPH0421921 U JP H0421921U JP 6323090 U JP6323090 U JP 6323090U JP 6323090 U JP6323090 U JP 6323090U JP H0421921 U JPH0421921 U JP H0421921U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- transducer
- distance
- ultrasonic
- reflected
- 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
- 238000005259 measurement Methods 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 claims description 2
- 230000002238 attenuated effect Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Description
第１図は本考案の１実施例の構成を示すブロツ
ク図、第２図は第１図に示す実施例の動作を説明
する波形図、第３図は従来の超音波距離計の構成
を示すブロツク図、第４図は第３図に示す超音波
距離計の動作を説明する波形図、第５図は第３図
に示す超音波距離計の問題点を説明する波形図で
ある。
１０……演算回路、１１……超音波発振回路、
１３……送受波器、１４……測定対象物、１５…
…受信アンプ、１６……比較器、１７……出力回
路、２０……アツテネータ、２１……演算回路、
ＳＴ……スタート信号、ＲＳ１〜ＲＳ４……受信
信号、ＳＨ……閾値、ＣＳ，ＣＳ１……比較信号
、ＫＳ……制御信号。
Fig. 1 is a block diagram showing the configuration of one embodiment of the present invention, Fig. 2 is a waveform diagram explaining the operation of the embodiment shown in Fig. 1, and Fig. 3 shows the structure of a conventional ultrasonic distance meter. 4 is a waveform diagram illustrating the operation of the ultrasonic distance meter shown in FIG. 3, and FIG. 5 is a waveform diagram illustrating problems with the ultrasonic distance meter shown in FIG. 3. 10... Arithmetic circuit, 11... Ultrasonic oscillation circuit,
13... Transducer/receiver, 14... Measurement object, 15...
...Receiving amplifier, 16...Comparator, 17...Output circuit, 20...Attenuator, 21...Arithmetic circuit,
ST...start signal, RS1 to RS4...received signal, SH...threshold value, CS, CS1...comparison signal, KS...control signal.
Claims (1)
から反射する反射パルスを受信する送受波器と、
この送受波器に電気駆動パルスを供給する超音波
発振回路と、前記送受波器で受けた前記反射パル
スに対応した受信信号を受信する受信アンプと、
制御信号に応じて所定期間のあいだこの受信信号
を減衰させて出力信号として出力するアツテネー
タと、この出力信号を所定の閾値と比較して比較
信号を出力する比較器と、前記超音波パルスの送
出から前記比較信号を受信するまでの時間を計測
して測定対象物までの距離を測定し距離信号とし
て送出すると共に前記送受波器で残留振動が発生
している前記所定期間内のみ受信信号を減衰させ
る前記制御信号を出力する演算手段とを具備し、
前記残留振動を検出レベル以下に抑えて測定可能
範囲を拡大することを特徴とする超音波距離計。 a transducer that transmits ultrasonic pulses to a measurement target and receives reflected pulses reflected from the measurement target;
an ultrasonic oscillation circuit that supplies electrical drive pulses to the transducer; a receiving amplifier that receives a reception signal corresponding to the reflected pulse received by the transducer;
an attenuator that attenuates the received signal for a predetermined period according to a control signal and outputs it as an output signal; a comparator that compares this output signal with a predetermined threshold value and outputs a comparison signal; and a transmitter of the ultrasonic pulse. The distance to the object to be measured is measured by measuring the time from the time to receiving the comparison signal, and the distance signal is transmitted as a distance signal, and the received signal is attenuated only during the predetermined period when residual vibration is occurring in the transducer. a calculation means for outputting the control signal to cause the
An ultrasonic distance meter characterized by expanding the measurable range by suppressing the residual vibration below a detection level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6323090U JPH0421921U (en) | 1990-06-15 | 1990-06-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6323090U JPH0421921U (en) | 1990-06-15 | 1990-06-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0421921U true JPH0421921U (en) | 1992-02-24 |
Family
ID=31593094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6323090U Pending JPH0421921U (en) | 1990-06-15 | 1990-06-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0421921U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60174972A (en) * | 1983-11-04 | 1985-09-09 | エンドレス・ウント・ハウザ−・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング・ウント・コンパニ− | Sound wave or ultrasonic range finder |
-
1990
- 1990-06-15 JP JP6323090U patent/JPH0421921U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60174972A (en) * | 1983-11-04 | 1985-09-09 | エンドレス・ウント・ハウザ−・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング・ウント・コンパニ− | Sound wave or ultrasonic range finder |
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