JPS6474492A - Road surface snowfall depth meter - Google Patents
Road surface snowfall depth meterInfo
- Publication number
- JPS6474492A JPS6474492A JP23120487A JP23120487A JPS6474492A JP S6474492 A JPS6474492 A JP S6474492A JP 23120487 A JP23120487 A JP 23120487A JP 23120487 A JP23120487 A JP 23120487A JP S6474492 A JPS6474492 A JP S6474492A
- Authority
- JP
- Japan
- Prior art keywords
- road surface
- depth
- time
- gate signal
- transmitter receiver
- 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
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
PURPOSE:To prevent mismeasurement due to noise by taking no measurement if there is a received signal at specific time when the depth of road surface snow fall is measured by utilizing the going and returning propagation time of an ultrasonic wave pulse. CONSTITUTION:A transmitter receiver 1 provided at a position of 5-6m from a road surface sends an ultrasonic wave pulse, and finding a distance X to a snow surface from the time up to the reception of a reflected wave and subtracts it from the distance H to the road surface H to measure the depth D of snow fall. A transmission and reception timing circuit 5 generates a sent timing signal with 1ms width at intervals of 100ms and also generates a 1st received gate signal corresponding to the reflected wave of the position of 1-1.5m from the transmitter receiver and a 2nd received gate signal corresponding to the reflected position of 0-1m from the surface surface. A CPU 9 decides a noise such as the engine tone of an automobile when the transmitter receiver 1 at the time of the 1st received gate signal, thereby halting the arithmetic operation of the snowfall depth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23120487A JPH0760187B2 (en) | 1987-09-17 | 1987-09-17 | Road area snow depth meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23120487A JPH0760187B2 (en) | 1987-09-17 | 1987-09-17 | Road area snow depth meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6474492A true JPS6474492A (en) | 1989-03-20 |
| JPH0760187B2 JPH0760187B2 (en) | 1995-06-28 |
Family
ID=16919971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23120487A Expired - Lifetime JPH0760187B2 (en) | 1987-09-17 | 1987-09-17 | Road area snow depth meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0760187B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019105675A1 (en) | 2017-11-30 | 2019-06-06 | Unilever Plc | Detergent composition comprising protease |
| WO2020058096A1 (en) | 2018-09-18 | 2020-03-26 | Unilever Plc | Detergent composition |
| EP3882346A1 (en) | 2013-05-29 | 2021-09-22 | Danisco US Inc. | Novel metalloproteases |
| WO2024050339A1 (en) | 2022-09-02 | 2024-03-07 | Danisco Us Inc. | Mannanase variants and methods of use |
-
1987
- 1987-09-17 JP JP23120487A patent/JPH0760187B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3882346A1 (en) | 2013-05-29 | 2021-09-22 | Danisco US Inc. | Novel metalloproteases |
| WO2019105675A1 (en) | 2017-11-30 | 2019-06-06 | Unilever Plc | Detergent composition comprising protease |
| WO2020058096A1 (en) | 2018-09-18 | 2020-03-26 | Unilever Plc | Detergent composition |
| WO2024050339A1 (en) | 2022-09-02 | 2024-03-07 | Danisco Us Inc. | Mannanase variants and methods of use |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0760187B2 (en) | 1995-06-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment |
Free format text: PAYMENT UNTIL: 20080628 Year of fee payment: 13 |