JPH04177192A - Ultrasonic distance meter - Google Patents
Ultrasonic distance meterInfo
- Publication number
- JPH04177192A JPH04177192A JP30389290A JP30389290A JPH04177192A JP H04177192 A JPH04177192 A JP H04177192A JP 30389290 A JP30389290 A JP 30389290A JP 30389290 A JP30389290 A JP 30389290A JP H04177192 A JPH04177192 A JP H04177192A
- Authority
- JP
- Japan
- Prior art keywords
- pulse signal
- distance
- ultrasonic pulse
- distance measurement
- reflection
- 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
- 238000005259 measurement Methods 0.000 abstract 3
- 230000005540 biological transmission Effects 0.000 abstract 2
- 238000001914 filtration Methods 0.000 abstract 2
- 230000001702 transmitter Effects 0.000 abstract 2
Abstract
PURPOSE: To improve response, prevent erroneous function due to jamming and at the same time increase the accuracy of distance measurement by setting a predetermined center frequency of the ultrasonic pulse signal emitted by itself as a standard.
CONSTITUTION: An ultrasonic pulse transmitter and receiver means 20 transmits an ultrasonic pulse signal having a determined center frequency and receives the ultrasonic pulse signal having returned due to the reflection from an object. A distance measurement means 30 measures the distance between the objects based on the information of transmission and reception of the pulse at the transmitter and receiver means 20 and indicates the measured distance on an indicator 6. A judgement means 40 compares the maximum amplitude of the received wave not subjected to band-pass filtering and the amplitude of the received wave subjected to band-pass filtering, judges by the comparison whether or not the received pulse signal wave is the reflection of the transmission by itself and determines with a control means 60 whether or not to indicate on the indicator 6 the distance measured with the distance measurement means 30 based on the judged result.
COPYRIGHT: (C)1992,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2303892A JP2820315B2 (en) | 1990-11-13 | 1990-11-13 | Ultrasonic ranging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2303892A JP2820315B2 (en) | 1990-11-13 | 1990-11-13 | Ultrasonic ranging device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04177192A true JPH04177192A (en) | 1992-06-24 |
| JP2820315B2 JP2820315B2 (en) | 1998-11-05 |
Family
ID=17926521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2303892A Expired - Fee Related JP2820315B2 (en) | 1990-11-13 | 1990-11-13 | Ultrasonic ranging device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2820315B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103645478A (en) * | 2013-12-20 | 2014-03-19 | 奇瑞汽车股份有限公司 | Ultrasonic distance measuring device |
-
1990
- 1990-11-13 JP JP2303892A patent/JP2820315B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103645478A (en) * | 2013-12-20 | 2014-03-19 | 奇瑞汽车股份有限公司 | Ultrasonic distance measuring device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2820315B2 (en) | 1998-11-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| S111 | Request for change of ownership or part of ownership |
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|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
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| R360 | Written notification for declining of transfer of rights |
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| FPAY | Renewal fee payment (prs date is renewal date of database) |
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| FPAY | Renewal fee payment (prs date is renewal date of database) |
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| R370 | Written measure of declining of transfer procedure |
Free format text: JAPANESE INTERMEDIATE CODE: R370 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313117 |
|
| R350 | Written notification of registration of transfer |
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| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100828 Year of fee payment: 12 |
|
| LAPS | Cancellation because of no payment of annual fees |