JPS561349A - Measuring method of propagation time of sound wave and finding position - Google Patents
Measuring method of propagation time of sound wave and finding positionInfo
- Publication number
- JPS561349A JPS561349A JP7790379A JP7790379A JPS561349A JP S561349 A JPS561349 A JP S561349A JP 7790379 A JP7790379 A JP 7790379A JP 7790379 A JP7790379 A JP 7790379A JP S561349 A JPS561349 A JP S561349A
- Authority
- JP
- Japan
- Prior art keywords
- sound wave
- wave
- maximum value
- propagation time
- arrival
- 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
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
PURPOSE: To accurately measure the propagation time of a sound wave by correcting according to the maximum value of the wave form of the received sound wave, the threshold for discriminating the maximum value, the propagation speed of the first arrival wave, and the propagation speed of the arrival wave having the maximum value.
CONSTITUTION: The output from a microphone 4 is detected by an envelop detection circuit 7. The envelop detection output is supplied for a peak detection circuit 8 to detect a peak value, which is discriminated from a prescribed level in a level discrimination circuit 9. Outputs from the peak detection circuit 8, the level discrimination circuit 9, and a pulse oscillator 3 are supplied for an operational circuit 10. Time needed for a sound wave to reach a threshold is corrected according to the maximum value in the amplitude distribution of received signals, the speed of the first arrival wave of the sound wave, and the speed of the arrival wave having the maximum value. Thus, the propagation time of the first arrival wave of the received sound wave can be calculated, and displayed on an indicator 16.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54077903A JPS5825225B2 (en) | 1979-06-19 | 1979-06-19 | Sound wave propagation time measurement method and position locating method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54077903A JPS5825225B2 (en) | 1979-06-19 | 1979-06-19 | Sound wave propagation time measurement method and position locating method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS561349A true JPS561349A (en) | 1981-01-09 |
JPS5825225B2 JPS5825225B2 (en) | 1983-05-26 |
Family
ID=13647025
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54077903A Expired JPS5825225B2 (en) | 1979-06-19 | 1979-06-19 | Sound wave propagation time measurement method and position locating method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5825225B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019023662A (en) * | 2018-11-13 | 2019-02-14 | パイオニア株式会社 | Processing device |
WO2019220760A1 (en) * | 2018-05-15 | 2019-11-21 | 三菱重工サーマルシステムズ株式会社 | Position measuring system, air conditioning system, terminal device, position estimation device, position estimation method, sound wave outputting method, and program |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6338316U (en) * | 1986-08-27 | 1988-03-11 |
-
1979
- 1979-06-19 JP JP54077903A patent/JPS5825225B2/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019220760A1 (en) * | 2018-05-15 | 2019-11-21 | 三菱重工サーマルシステムズ株式会社 | Position measuring system, air conditioning system, terminal device, position estimation device, position estimation method, sound wave outputting method, and program |
JP2019200091A (en) * | 2018-05-15 | 2019-11-21 | 三菱重工サーマルシステムズ株式会社 | Positioning system, air conditioning system, terminal device, location estimation device, location estimation method, sound wave output method and program |
JP2019023662A (en) * | 2018-11-13 | 2019-02-14 | パイオニア株式会社 | Processing device |
Also Published As
Publication number | Publication date |
---|---|
JPS5825225B2 (en) | 1983-05-26 |
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