JPS6247983U - - Google Patents
Info
- Publication number
- JPS6247983U JPS6247983U JP14121085U JP14121085U JPS6247983U JP S6247983 U JPS6247983 U JP S6247983U JP 14121085 U JP14121085 U JP 14121085U JP 14121085 U JP14121085 U JP 14121085U JP S6247983 U JPS6247983 U JP S6247983U
- Authority
- JP
- Japan
- Prior art keywords
- output
- circuit
- ultrasonic pulse
- pulse doppler
- doppler device
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Control Of Amplification And Gain Control (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
Description
第１図はこの考案の一実施例を示す概略ブロツ
ク図、第２図は第１図の実施例の各部の信号の波
形図、第３図はエコー信号が無いときとあるとき
の対数増幅器の出力を示す波形図である。
１…トランスデユーサ、２…対数アンプ、３…
スイツチ回路、４…位相検波回路、９…検波回路
、１０…ローパスフイルタ、１１…積分器、１２
…ホールド回路、１３…比較器、１５…遅延回路
。
Fig. 1 is a schematic block diagram showing an embodiment of this invention, Fig. 2 is a waveform diagram of signals at various parts of the embodiment of Fig. 1, and Fig. 3 shows the logarithmic amplifier when there is no echo signal and when there is an echo signal. FIG. 3 is a waveform diagram showing the output. 1...transducer, 2...logarithmic amplifier, 3...
Switch circuit, 4... Phase detection circuit, 9... Detection circuit, 10... Low pass filter, 11... Integrator, 12
...Hold circuit, 13...Comparator, 15...Delay circuit.
Claims (1)
有する超音波パルスドツプラー装置において、前
記エコー信号の有無を検出するための手段を設け
、前記エコー信号が無いときには当該超音波パル
スドツプラー装置の出力をカツトオフするように
したことを特徴とする、超音波パルスドツプラー
装置。 (2) 前記エコー信号の有無を検出する手段は、 前記対数アンプの出力を包絡線検波する包絡線
検波回路と、 前記包絡線検波回路の出力を積分する積分回路
と、 前記積分回路の出力をホールドするホールド回
路と、 前記ホールド回路の出力を基準電圧と比較する
比較回路とを含む、実用新案登録請求の範囲第(1
)項記載の超音波パルスドツプラー装置。[Claims for Utility Model Registration] (1) In an ultrasonic pulse Doppler device having a logarithmic amplifier for amplifying echo signals, means for detecting the presence or absence of the echo signal is provided, and when there is no echo signal, An ultrasonic pulse Doppler device, characterized in that the output of the ultrasonic pulse Doppler device is cut off. (2) The means for detecting the presence or absence of the echo signal includes: an envelope detection circuit that performs envelope detection on the output of the logarithmic amplifier; an integrator circuit that integrates the output of the envelope detection circuit; Utility model registration claim No. 1 includes a hold circuit that holds the hold circuit and a comparison circuit that compares the output of the hold circuit with a reference voltage.
) The ultrasonic pulse Doppler device described in item 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14121085U JPH0351753Y2 (en) | 1985-09-13 | 1985-09-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14121085U JPH0351753Y2 (en) | 1985-09-13 | 1985-09-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6247983U true JPS6247983U (en) | 1987-03-24 |
| JPH0351753Y2 JPH0351753Y2 (en) | 1991-11-07 |
Family
ID=31048791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14121085U Expired JPH0351753Y2 (en) | 1985-09-13 | 1985-09-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0351753Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003194921A (en) * | 2001-12-21 | 2003-07-09 | Furuno Electric Co Ltd | Input signal processor and distance measuring apparatus |
| JP2011203076A (en) * | 2010-03-25 | 2011-10-13 | Toshiba Corp | Ils apparatus |
-
1985
- 1985-09-13 JP JP14121085U patent/JPH0351753Y2/ja not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003194921A (en) * | 2001-12-21 | 2003-07-09 | Furuno Electric Co Ltd | Input signal processor and distance measuring apparatus |
| JP2011203076A (en) * | 2010-03-25 | 2011-10-13 | Toshiba Corp | Ils apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0351753Y2 (en) | 1991-11-07 |
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