JPS5689074A - Sound wave detector - Google Patents
Sound wave detectorInfo
- Publication number
- JPS5689074A JPS5689074A JP16734079A JP16734079A JPS5689074A JP S5689074 A JPS5689074 A JP S5689074A JP 16734079 A JP16734079 A JP 16734079A JP 16734079 A JP16734079 A JP 16734079A JP S5689074 A JPS5689074 A JP S5689074A
- Authority
- JP
- Japan
- Prior art keywords
- piezoelectric element
- filters
- signal
- outputs
- electric signals
- 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
- 238000001514 detection method Methods 0.000 abstract 1
- 230000002194 synthesizing effect Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
- G01S7/523—Details of pulse systems
- G01S7/526—Receivers
- G01S7/527—Extracting wanted echo signals
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
PURPOSE:To make signal to noise ratio good by segmenting the electric signals which a piezoelectric element has generated by receiving reflected waves to plural systems by their generation times, passing these to filter circuts of respectively suited characteristics and combining these. CONSTITUTION:The ultrasonic wave pulses generated by a piezoelectric element 1 are reflected by reflectors a-d of different depths of a target 2, and these reflected waves are converted to electric signals by the piezoelectric element 1. These are applied simultaneously to gate circuit groups 61-64, and the gate circuits open one by one for a fixed time only. The outputs thereof a are passed through filters 71-74 of different characteristics having the impulse response waveforms coinciding with the signal waveforms in the respective time sections which are inverted of their time axes. The outputs are next synthesized in a synthesizing circuit 8 and the synthesized signal is applied to and displayed in a display device 5. Hence, the SN ratio and detection efficiency are improved by processing the signals with the filters which are respectively different according to the distances up to the points of reflection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16734079A JPS5689074A (en) | 1979-12-21 | 1979-12-21 | Sound wave detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16734079A JPS5689074A (en) | 1979-12-21 | 1979-12-21 | Sound wave detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5689074A true JPS5689074A (en) | 1981-07-20 |
Family
ID=15847910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16734079A Pending JPS5689074A (en) | 1979-12-21 | 1979-12-21 | Sound wave detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5689074A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60164248A (en) * | 1984-02-06 | 1985-08-27 | Toshiba Corp | Ultrasonic wave diagnostic apparatus |
-
1979
- 1979-12-21 JP JP16734079A patent/JPS5689074A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60164248A (en) * | 1984-02-06 | 1985-08-27 | Toshiba Corp | Ultrasonic wave diagnostic apparatus |
| JPH0326607B2 (en) * | 1984-02-06 | 1991-04-11 | Tokyo Shibaura Electric Co |
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