JPS6415692A - Snow depth measuring apparatus - Google Patents

Snow depth measuring apparatus

Info

Publication number
JPS6415692A
JPS6415692A JP62171159A JP17115987A JPS6415692A JP S6415692 A JPS6415692 A JP S6415692A JP 62171159 A JP62171159 A JP 62171159A JP 17115987 A JP17115987 A JP 17115987A JP S6415692 A JPS6415692 A JP S6415692A
Authority
JP
Japan
Prior art keywords
time
peak time
snow
data
compared
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
Application number
JP62171159A
Other languages
Japanese (ja)
Other versions
JPH079469B2 (en
Inventor
Masamichi Ando
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koito Industries Ltd
Original Assignee
Koito Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Koito Industries Ltd filed Critical Koito Industries Ltd
Priority to JP62171159A priority Critical patent/JPH079469B2/en
Publication of JPS6415692A publication Critical patent/JPS6415692A/en
Publication of JPH079469B2 publication Critical patent/JPH079469B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

PURPOSE:To eliminate a measuring error when the surface of snow is soft, by employing a shorter value of either one of an actually measured peak time and an estimated peak time. CONSTITUTION:The signal detected by an ultrasonic wave transmitter-receiver 1 is compared, corrected and operated by a CPU 4 to measure snow quantity. The correction value proportional to the measured receiving signal is predetermined and added to the beginning time of the receiving signal used for determining the reciprocating required time at the time of the transmission and reception of an ultrasonic wave. When the level of a reflected wave reaches 1/several ten that at a time when there is no snow on a road surface, a correction value determined separately is further subtracted drom the value to which the correction value is added to obtain an estimated peak time. The estimated peak time is compared with an actually measured peak time and the shorter value is set to a peak time and temp. correction is applied thereto. Further, the obtained data is compared with the average data of past N data to judge whether said data is disturbance noise. By this method, a measuring error is eliminated even when the surface of snow is soft.
JP62171159A 1987-07-10 1987-07-10 Snow depth measuring device Expired - Lifetime JPH079469B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62171159A JPH079469B2 (en) 1987-07-10 1987-07-10 Snow depth measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62171159A JPH079469B2 (en) 1987-07-10 1987-07-10 Snow depth measuring device

Publications (2)

Publication Number Publication Date
JPS6415692A true JPS6415692A (en) 1989-01-19
JPH079469B2 JPH079469B2 (en) 1995-02-01

Family

ID=15918082

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62171159A Expired - Lifetime JPH079469B2 (en) 1987-07-10 1987-07-10 Snow depth measuring device

Country Status (1)

Country Link
JP (1) JPH079469B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020501127A (en) * 2016-09-22 2020-01-16 シグニファイ ホールディング ビー ヴィＳｉｇｎｉｆｙ Ｈｏｌｄｉｎｇ Ｂ．Ｖ． Flood location and notification via intelligent lighting

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11211846A (en) * 1998-01-22 1999-08-06 Yokogawa Electric Corp Snow depth meter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020501127A (en) * 2016-09-22 2020-01-16 シグニファイ ホールディング ビー ヴィＳｉｇｎｉｆｙ Ｈｏｌｄｉｎｇ Ｂ．Ｖ． Flood location and notification via intelligent lighting
US11064591B2 (en) 2016-09-22 2021-07-13 Signify Holding B.V. Flooding localization and signalling via intelligent lighting

Also Published As

Publication number Publication date
JPH079469B2 (en) 1995-02-01

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