JPH0769437B2 - Snow cover - Google Patents
Snow coverInfo
- Publication number
- JPH0769437B2 JPH0769437B2 JP2416434A JP41643490A JPH0769437B2 JP H0769437 B2 JPH0769437 B2 JP H0769437B2 JP 2416434 A JP2416434 A JP 2416434A JP 41643490 A JP41643490 A JP 41643490A JP H0769437 B2 JPH0769437 B2 JP H0769437B2
- Authority
- JP
- Japan
- Prior art keywords
- snow
- signal
- sensor
- detection
- value
- 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.)
- Expired - Lifetime
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Measuring Volume Flow (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、積雪の深さ計測に利用
する。BACKGROUND OF THE INVENTION The present invention is used for measuring the depth of snow.
【０００２】本発明は、検出ポールの着雪あるいは積雪
中の空洞のような異常を除外し、積雪深の値を正確に測
定することができる積雪計に関する。The present invention relates to a snow meter capable of accurately measuring the value of the snow depth by excluding abnormalities such as snow accretion on a detection pole or cavities in the snow.
【０００３】[0003]
【従来の技術】従来、この種の積雪計は図１に示すよう
に、検出ポール１と、この検出ポール１の地表面ＧＬか
らの距離に連続的に対応する検出点に配置された積雪の
有無を出力信号として送出する複数のセンサ３と、この
センサ３の出力信号を入力し積雪深の信号を出力する回
路手段（プリント基板）２とを備え、センサ３は図２に
示すように、検出ポール１内の回路手段（プリント基
板）２上にセパレータ１a を介在して配置された発光素
子31および受光素子32を含む。このように構成された従
来の積雪計は、発光素子31が発生する光 (音波あるいは
電波の場合もある) を積雪層に反射させ、どの検出点ま
での受光素子32が反射光を受けたかによって積雪量を測
定していた。図１に示す場合では検出点Ｔ4 以上は積雪
層がないために光は反射されず、したがって光が反射さ
れる検出点Ｔ1 〜Ｔ3 までが積雪量として測定されてい
た。2. Description of the Related Art Conventionally, as shown in FIG. 1, a snow meter of this type has a detection pole 1 and a snow cover arranged at a detection point continuously corresponding to the distance of the detection pole 1 from the ground surface GL. The sensor 3 is provided with a plurality of sensors 3 for transmitting the presence / absence as output signals, and a circuit means (printed circuit board) 2 for receiving the output signals of the sensors 3 and outputting a signal of snow depth. The sensor 3 is, as shown in FIG. The detection pole 1 includes a light emitting element 31 and a light receiving element 32 which are arranged on a circuit means (printed circuit board) 2 with a separator 1a interposed. The conventional snow meter constructed in this way reflects the light (which may be sound waves or radio waves) generated by the light-emitting element 31 on the snow layer, and depending on which detection point the light-receiving element 32 receives the reflected light. I was measuring the amount of snow. In the case shown in FIG. 1, light is not reflected at the detection points T 4 and above because there is no snow layer, and therefore the detection points T 1 to T 3 at which the light is reflected were measured as the amount of snow.
【０００４】[0004]
【発明が解決しようとする課題】このような従来の積雪
計は、積雪が地表面ＧＬ上に一様に積層されている場合
には正確な積雪深を検出することができるが、気象状況
の変化によっては図８に示すように検出ポール１に着雪
してしまうことがしばしばみられ、実際の積雪深の値は
Ｔa であるにもかかわらずＴb あるいはＴc の高さをも
って積雪深としてしまう問題がある。また、図９に示す
ように実際の積雪深はＴa であるにもかかわらず空洞が
あるためＴd の高さをもって積雪深の値としてしまう問
題がある。Such a conventional snow gauge can detect an accurate snow depth when the snow is evenly stacked on the ground surface GL, but it can Depending on the change, it is often seen that the detection pole 1 snows as shown in FIG. 8, and although the actual snow depth value is T a , the snow depth is at the height of T b or T c. There is a problem that ends up. Further, as shown in FIG. 9, there is a problem that the height of T d is taken as the value of the snow depth because there is a cavity even though the actual snow depth is T a .
【０００５】本発明はこのような問題を解決するもの
で、着雪や空洞の存在を判別して積雪深の値を正確に得
ることができる積雪計を提供することを目的とする。The present invention solves such a problem, and an object of the present invention is to provide a snow gauge capable of accurately determining the value of the snow depth by determining the presence of snow and the presence of a cavity.
【０００６】[0006]
【課題を解決するための手段】本発明は、地表面に立設
される検出ポールと、この検出ポールの地表面からの距
離に対応する多数の検出点に配置され、その検出点にお
ける積雪の有無を出力信号として送出するセンサと、こ
の出力信号を入力とし積雪深を出力する回路手段とを備
えた積雪計において、前記回路手段は、測定時刻に測定
レンジ全長にわたる前記センサの出力信号を取込む手段
と、この手段により取込まれた測定レンジ全長にわたる
前記センサの出力信号をデータとして記憶する記憶手段
と、あらたに取込まれた前記データと少し前の測定時刻
の前記データとを比較し、前記センサごとの変化のうち
非合理的な変化を自動的に除外する比較処理手段とを備
えたことを特徴とする。According to the present invention, a detection pole which is erected on the ground surface and a large number of detection points corresponding to the distances of the detection pole from the ground surface are provided. In a snow meter equipped with a sensor for sending the presence / absence as an output signal, and a circuit means for receiving the output signal and outputting the snow depth, the circuit means captures the output signal of the sensor over the entire measurement range at a measurement time. Means for storing the output signal of the sensor over the entire length of the measurement range captured by this means as data, and the data newly captured and the data at a measurement time slightly before. And a comparison processing unit that automatically excludes an irrational change among the changes for each sensor.
【０００７】前記センサは発光素子およびその発光素子
の出力光を受光する受光素子とを含む光反射検出形のセ
ンサであり、前記比較処理手段は、複数の検出ポールに
ついて共通に設けられることが望ましい。The sensor is a light reflection detection type sensor including a light emitting element and a light receiving element for receiving the output light of the light emitting element, and the comparison processing means is preferably provided in common for a plurality of detection poles. .
【０００８】[0008]
【作用】地表面に立設された検出ポールの地表面からの
距離に対応する多数の検出点の積雪の有無をセンサが検
出し、回路手段がこの検出信号を入力し積雪深出力とし
て送出する。このようにして送出された測定レンジ全長
にわたる積雪深出力をあらかじめ定められた測定時刻に
データとして記憶しておき、あらたに取込まれたデータ
と比較して各センサごとの変化のうちの非合理的な変化
を自動的に除外する。The sensor detects the presence or absence of snow at a large number of detection points corresponding to the distance from the ground surface of the detection pole erected on the ground surface, and the circuit means inputs this detection signal and sends it as the snow depth output. . The snow depth output over the entire length of the measurement range sent in this way is stored as data at a predetermined measurement time, and compared with the newly acquired data, it is irrational of the changes for each sensor. Automatic changes are automatically excluded.
【０００９】例えば、「反射有」の信号を「１」とし、
「反射無」の信号を「０」とすると、信号「１」の状態
から信号「０」の状態になった位置を検出部全長にわた
り記憶し、この新たに記憶した位置と前回計測して記憶
された位置との変化に基づいて着雪あるいは空洞状態か
ら合理的に積雪深の値を判断する。For example, the signal "with reflection" is set to "1",
When the signal of "no reflection" is set to "0", the position from the state of signal "1" to the state of signal "0" is stored over the entire length of the detection unit, and the newly stored position and the previous measurement are stored. The snow depth value is reasonably determined from the snow accretion or the hollow state based on the change from the determined position.
【００１０】これにより、着雪や空洞が生じた場合でも
その状態を自動的に判別することが可能となり、正確な
積雪深の計測を行うことができる。With this, even if snow accretion or a cavity occurs, the state thereof can be automatically discriminated, and the accurate snow depth can be measured.
【００１１】[0011]
【実施例】次に、本発明実施例を図面に基づいて説明す
る。図１は従来例および本発明実施例の構成を示す図、
図２は従来例および本発明実施例のセンサの構成を示す
図（図１に示すＡ−Ａ′断面図）、図３は本発明実施例
の回路手段の構成を示すブロック図である。Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a diagram showing a configuration of a conventional example and an embodiment of the present invention,
FIG. 2 is a diagram showing a structure of a sensor of a conventional example and an embodiment of the present invention (a sectional view taken along the line AA 'shown in FIG. 1), and FIG. 3 is a block diagram showing a structure of a circuit means of the embodiment of the present invention.
【００１２】本発明実施例は、地表面ＧＬに立設された
検出ポール１と、この検出ポール１の地表面ＧＬからの
距離に対応する多数の検出点Ｔ1 〜Ｔn に配置され、そ
の検出点Ｔ1 〜Ｔn における積雪の有無を出力信号とし
て送出するセンサ３と、この出力信号を入力とし積雪深
を出力するプリント基板により構成された回路手段２と
を備え、さらに、本発明の特徴として、回路手段２に
は、測定時刻に測定レンジ全長にわたるセンサ３の出力
信号を取込むセンサ出力取込み手段21と、このセンサ出
力取込み手段21により取込まれた測定レンジ全長にわた
るセンサ３の出力信号をデータとして記憶する記憶手段
22と、あらたに取込まれた前記データと少し前の測定時
刻の前記データとを比較し、センサ３ごとの変化のうち
非合理的な変化を自動的に除外する比較処理手段23とを
備える。In the embodiment of the present invention, the detection pole 1 erected on the ground surface GL and a large number of detection points T 1 to T n corresponding to the distance of the detection pole 1 from the ground surface GL are arranged. The sensor 3 for sending out the presence or absence of snowfall at the detection points T 1 to T n as an output signal, and the circuit means 2 constituted by a printed board for receiving the output signal and outputting the snowfall depth are further provided. Characteristically, the circuit means 2 includes a sensor output capturing means 21 for capturing the output signal of the sensor 3 over the entire measurement range at the measurement time, and an output of the sensor 3 over the entire measurement range captured by the sensor output capturing means 21. Storage means for storing signals as data
22 and a comparison processing unit 23 that compares the newly captured data with the data at a measurement time slightly before, and automatically excludes an irrational change among the changes of each sensor 3.
【００１３】本実施例では、センサ３は図２に図１のＡ
−Ａ′断面で示すように、発光素子31およびその発光素
子31の出力光を受光する受光素子32とを含む光反射検出
形のセンサを用いるものとして説明するが、音波あるい
は電波を用いて検出することも可能である。In this embodiment, the sensor 3 is shown in FIG.
As will be described with reference to the -A 'cross section, a light reflection detection type sensor including a light emitting element 31 and a light receiving element 32 that receives the output light of the light emitting element 31 is used, but the detection is performed using sound waves or radio waves. It is also possible to do so.
【００１４】比較処理手段23は、各地に配置された複数
の検出ポールについて共通に設けられる。The comparison processing means 23 is commonly provided for a plurality of detection poles arranged in various places.
【００１５】次に、このように構成された本発明実施例
の動作について説明する。図４は本発明実施例における
処理動作の概要を説明する図である。Next, the operation of the embodiment of the present invention thus constructed will be described. FIG. 4 is a diagram for explaining the outline of the processing operation in the embodiment of the present invention.
【００１６】検出ポール１に配置されたセンサ３から、
あらかじめ定められた測定時刻に測定レンジ全長にわた
り測定された出力信号（反射ありの場合：「１」、反射
なしの場合：「０」）を回路手段２のセンサ出力取込み
手段21が取込み、記憶手段22が連続した信号「１」の状
態から信号「０」の状態になる位置のデータを記憶す
る。From the sensor 3 arranged on the detection pole 1,
The sensor output capturing means 21 of the circuit means 2 captures the output signal (with reflection: "1", without reflection: "0") measured over the entire length of the measurement range at a predetermined measurement time, and the storage means. 22 stores the data of the position where the continuous signal "1" changes from the signal "0".
【００１７】所定時間経過後あらたにセンサ３からの出
力信号が取込まれたときに、比較処理手段23が前回記憶
された位置データと比較して変化量を算出し、基本判
断、着雪判断、および空洞判断の各処理を行う。When the output signal from the sensor 3 is newly taken in after the lapse of a predetermined time, the comparison processing means 23 calculates the amount of change by comparing with the previously stored position data, and makes a basic judgment and a snowfall judgment. , And cavity determination processing.
【００１８】まず、基本判断処理では、連続した信号
「１」の状態中に信号「０」の状態が１ビットだけある
場合には信号「１」、すなわち「反射あり」の状態が連
続しているものとし、地表面ＧＬからみて連続した信号
「１」の状態の中に２ビット以上信号「０」の状態があ
ったときには信号「１」の状態の上限値を今回の積雪深
の位置として判断し、算出された変化量からみて下方向
に地表面ＧＬから信号「１」の状態が連続している場合
には信号「１」の状態の上限位置を積雪深の値とする。First, in the basic judgment processing, when there is only one bit of the signal "0" in the continuous signal "1", the signal "1", that is, the "reflective" state is continuously generated. If there is a signal "0" of 2 bits or more in the continuous signal "1" when viewed from the ground surface GL, the upper limit of the signal "1" is set as the position of the snow depth this time. If the state of the signal “1” is continuous from the ground surface GL in the downward direction based on the calculated change amount, the upper limit position of the state of the signal “1” is set as the value of the snow depth.
【００１９】次に、着雪判断処理では、算出された変化
量よりも今回の積雪深の位置が測定時間間隔内に降雪し
得る最大積雪深を考慮して、定めた値以上にプラス側に
変化があったときは、算出された変化量を積雪深とし、
次の測定時の比較値としてその積雪深の位置を記憶手段
22に記憶する。また、地表面ＧＬから信号「１」の状態
が連続した後に２ビット以上の信号「０」の状態があっ
て再び信号「１」の状態がある場合には、信号「１」の
状態の上限値を今回の積雪深の位置とする。Next, in the snow accretion determination process, the position of the present snow depth is considered to be the maximum snow depth which can fall within the measurement time interval rather than the calculated change amount, and the value is shifted to the plus side above the predetermined value. When there is a change, the calculated amount of change is taken as the snow depth,
Means for storing the position of the snow depth as a comparison value for the next measurement
Remember in 22. In addition, when there is a signal “0” of 2 bits or more and then a signal “1” again after the signal “1” continues from the ground surface GL, the upper limit of the state of the signal “1” The value is the position of the depth of snow this time.
【００２０】さらに、空洞判断処理では、連続した信号
「１」の状態から信号「０」となる位置が前回算出した
変化量よりも測定時間間隔内に溶け得る最大量を考慮
し、定めた値よりも変化があるか否かを判断し、その判
断の結果により前述の基本判断または着雪判断処理と同
様の処理を行う。Further, in the cavity determination processing, a value determined in consideration of the maximum amount of the position where the signal "0" changes from the state of continuous signal "1" within the measurement time interval rather than the previously calculated change amount. It is determined whether there is a change, and the same processing as the above-described basic determination or snow accretion determination processing is performed according to the result of the determination.
【００２１】図５は本発明実施例における回路手段の具
体的な処理動作の流れを示すフローチャートである。FIG. 5 is a flow chart showing the flow of a concrete processing operation of the circuit means in the embodiment of the present invention.
【００２２】回路手段２のセンサ出力取込み手段21が検
出ポール１の各センサ３から出力された信号を取込み、
連続した信号「１」の状態から信号「０」となる位置を
記憶手段22に記憶し、連続した信号「１」の状態の間に
２ビット以上の連続した信号「０」の状態があるか否か
を判断する。The sensor output taking-in means 21 of the circuit means 2 takes in the signals outputted from the respective sensors 3 of the detection pole 1,
The position where the signal "0" is changed from the state of continuous signal "1" is stored in the storage means 22, and whether there is a state of continuous signal "0" of 2 bits or more between the states of continuous signal "1". Determine whether or not.
【００２３】２ビット以上の連続した信号「０」の状態
がなければ、信号「１」の状態の上限位置と10分前に測
定した値とを比較し、小さければ信号「１」の状態の上
限位置を記憶手段22に比較値として記憶し、信号「１」
の状態の上限位置を積雪深の値とする。大きければ信号
「１」の状態の上限位置と10分前に測定した値に６cmを
加えた値とを比較し、等しいか、あるいは大きければ着
雪と判断して信号「１」の状態の上限位置を記憶手段22
に比較値として記憶し、10分前に測定した値を積雪深の
値とする。If there is no continuous signal "0" of 2 bits or more, the upper limit position of the signal "1" is compared with the value measured 10 minutes before. The upper limit position is stored in the storage means 22 as a comparison value, and the signal "1" is stored.
The upper limit position of the condition of is the value of the snow depth. If it is larger, the upper limit position of the signal "1" is compared with the value obtained by adding 6 cm to the value measured 10 minutes ago, and if it is equal or larger, it is judged that it is snowing and the upper limit of the signal "1" state Position storage means 22
The value measured 10 minutes before is used as the value of snow depth.
【００２４】前述の判断処理で連続した信号「１」の状
態の間に２ビット以上の連続した信号「０」の状態があ
る場合には、地表面ＧＬより最初に２ビット以上信号
「０」となった位置と10分前に測定した値とを比較し、
大きい場合にはさらに地表面ＧＬより最初に２ビット以
上信号「０」となった位置と10分前の測定値に６cmを加
えた値とを比較し、大きい場合には着雪と判断し信号
「１」の状態の上限位置を比較値として記憶し、10分前
の測定値を積雪深の値とする。When there is a continuous signal "0" of 2 bits or more between the continuous signal "1" in the above-mentioned judgment processing, the signal "0" of 2 bits or more is first sent from the ground surface GL. Compare the position that became and the value measured 10 minutes ago,
If it is larger, the position where the signal "0" is more than 2 bits first from the ground surface GL is compared with the value obtained by adding 6 cm to the measured value 10 minutes ago. The upper limit position in the state of "1" is stored as a comparison value, and the measurement value 10 minutes before is used as the snow depth value.
【００２５】地表面ＧＬからみて最初に２ビット以上信
号「０」となった位置が10分前に測定した値に６cmを加
えた値よりも小さければ、これも着雪と判断して信号
「１」の状態の上限位置を比較値として記憶し、信号
「１」の状態の上限位置を積雪深の値とする。If the position where the signal "0" is initially 2 bits or more when viewed from the ground surface GL is smaller than the value obtained by adding 6 cm to the value measured 10 minutes ago, this is also judged to be snowing and the signal " The upper limit position in the state of "1" is stored as a comparison value, and the upper limit position in the state of signal "1" is set as the snow depth value.
【００２６】また、地表面ＧＬからみて最初に２ビット
以上信号「０」となった位置が10分前の測定値より小さ
ければ、地表面より最初に２ビット以上信号「０」とな
った位置が10分前に測定した値から６cm差引いた値と比
較し、大きければ着雪と判断して信号「１」の状態の上
限位置を比較値として記憶し、信号「１」の状態の上限
位置を積雪深の値とする。If the position where the signal "0" is initially 2 bits or more as viewed from the ground surface GL is smaller than the measured value 10 minutes ago, the position where the signal "0" is initially 2 bits or more from the ground surface. Is compared with the value obtained by subtracting 6 cm from the value measured 10 minutes before, and if it is larger, it is judged that it is snowing and the upper limit position of the signal “1” state is stored as a comparison value, and the upper limit position of the signal “1” state is stored. Is the value of snow depth.
【００２７】地表面より最初に２ビット以上信号が
「０」となった位置が10分前に測定した値から６cm差引
いた値に対して等しいか、あるいは小さい場合には、空
洞があると判断して、信号「１」の連続から信号「０」
となる位置の値と10分前に測定した値との絶対値差を算
出し、10分前に測定した値に一番近い位置を検索して10
分前に測定した値と比較する。If the position where the signal becomes "0" for 2 bits or more first from the ground surface is equal to or smaller than the value obtained by subtracting 6 cm from the value measured 10 minutes ago, it is judged that there is a cavity. Then, from the continuation of the signal "1", the signal "0"
Calculate the absolute value difference between the value at the position and the value measured 10 minutes before, and search for the position closest to the value measured 10 minutes before 10
Compare with the value measured minutes before.
【００２８】検索した位置の値の方が大きければ、さら
に検索した位置と１０分前に測定した値に６ｃｍを加え
た値と比較し、検索した値の方が大きいか、あるいは等
しければ、信号「１」の状態の上限位置を比較値として
記憶し、１０分前に測定した値を積雪深の値とする。If the value at the searched position is larger, the searched position is compared with the value measured 10 minutes before and 6 cm is added, and the searched value is larger, or the like.
In Kere, store the upper limit position of the state of the signal "1" as the comparison value, the value measured in 10 minutes before the value of deep snow.
【００２９】また、検索した位置が10分前に測定した値
よりも小さく、かつ検索した位置が10分前に測定した値
に６cmを加えた値よりも等しいか、あるいは小さい場合
には、信号「１」の状態の上限位置を比較値として記憶
し、信号「１」の状態の上限位置を積雪深の値とする。If the searched position is smaller than the value measured 10 minutes before, and the searched position is equal to or smaller than the value measured 6 minutes before the addition of 6 cm, the signal is The upper limit position in the state of "1" is stored as a comparison value, and the upper limit position in the state of signal "1" is set as the snow depth value.
【００３０】図６は本発明実施例における10分前の積雪
状態の例を示す図、図７(a) 〜(e) は本発明実施例にお
ける積雪状態に対する判断処理の例を示す図である。各
図中破線は10分前の積雪深の値を示す比較値である。FIG. 6 is a diagram showing an example of a snow accumulation state 10 minutes before in the embodiment of the present invention, and FIGS. 7 (a) to 7 (e) are diagrams showing an example of judgment processing for the snow accumulation state in the embodiment of the present invention. . The broken line in each figure is a comparison value indicating the value of the snow depth 10 minutes before.
【００３１】10分前の積雪が図６に示す状態にあったと
すると、図７(a) の場合は地表面ＧＬからみて信号
「１」が信号「０」になった位置と10分前の積雪深の値
との差が６cmより小さく、地表面ＧＬから信号「１」の
状態が連続していることを示し、同図(b) の場合は地表
面からみて信号「１」が信号「０」になった位置と10分
前の積雪深の値との差が−６cm以下であり、地表面から
信号「１」が地表面ＧＬから連続していることを示し、
同図(c) の場合は地表面ＧＬからみて信号「１」が信号
「０」になった位置と10分前の積雪深の値との差が６cm
以上であることを示す。Assuming that the snowfall 10 minutes ago is in the state shown in FIG. 6, in the case of FIG. 7A, the position at which the signal "1" becomes the signal "0" as seen from the ground surface GL and 10 minutes before The difference from the value of the snow depth is less than 6 cm, indicating that the condition of signal "1" is continuous from the ground surface GL. In the case of the figure (b), the signal "1" is the signal "1" when viewed from the ground surface. The difference between the position of "0" and the value of snow depth 10 minutes ago is -6 cm or less, indicating that the signal "1" from the ground surface is continuous from the ground surface GL,
In the case of the same figure (c), the difference between the position where the signal "1" becomes the signal "0" and the value of the snow depth 10 minutes before is 6 cm when viewed from the ground surface GL.
The above is shown.
【００３２】また、同図(d) の場合は信号「１」から信
号「０」になる位置が二つ以上あり、地表面ＧＬからみ
て最初に信号「１」から信号「０」になる位置と10分前
の積雪深の値との差が±６cmより小さいことを示し、同
図(e) の場合は信号「１」から信号「０」になる位置が
二つ以上あり、地表面からみて信号「１」が信号「０」
になる位置と10分前の積雪深の値との差が６cm以上ある
ことを示す。In the case of FIG. 3D, there are two or more positions where the signal "1" changes to the signal "0", and the position where the signal "1" changes to the signal "0" first when viewed from the ground surface GL. And the difference in snow depth 10 minutes before is less than ± 6 cm. In the case of (e) in the figure, there are two or more positions from signal "1" to signal "0". Look at the signal "1" and the signal "0"
It shows that there is a difference of 6 cm or more between the position at and the value of the snow depth 10 minutes ago.
【００３３】このような判断処理により図５に示す動作
が行われる。The operation shown in FIG. 5 is performed by such a determination process.
【００３４】[0034]
【発明の効果】以上説明したように本発明によれば、検
出ポールに着雪があったり、あるいは空洞が生じていて
も、同一信号の連続性、および前の測定時刻における積
雪深の値と今回測定時における積雪深の値との変化量に
基づく判断を行うことができ、正しい積雪深の値を得る
ことができる効果がある。As described above, according to the present invention, the continuity of the same signal and the value of the snow depth at the previous measurement time and the present value even if the detection pole has snow or a cavity is present. It is possible to make a judgment based on the amount of change from the value of the snow depth at the time of measurement, and it is possible to obtain the correct value of the snow depth.
【図面の簡単な説明】[Brief description of drawings]
【図１】 従来例および本発明実施例の構成を示す図。FIG. 1 is a diagram showing a configuration of a conventional example and an example of the present invention.
【図２】 従来例および本発明実施例のセンサの構成を
示す図。FIG. 2 is a diagram showing a configuration of a sensor of a conventional example and an example of the present invention.
【図３】 本発明実施例の回路手段の構成を示すブロッ
ク図。FIG. 3 is a block diagram showing the configuration of circuit means according to an embodiment of the present invention.
【図４】 本発明実施例における処理動作の概要を説明
する図。FIG. 4 is a diagram illustrating an outline of a processing operation according to the embodiment of the present invention.
【図５】 本発明実施例における回路手段の具体的な処
理動作の流れを示すフローチャート。FIG. 5 is a flowchart showing the flow of a specific processing operation of the circuit means in the embodiment of the present invention.
【図６】 本発明実施例における10分前の積雪状態の例
を示す図。FIG. 6 is a diagram showing an example of a snow cover state 10 minutes before in the embodiment of the present invention.
【図７】 (a) 〜(e) は本発明実施例における積雪状態
に対する判断処理の例を示す図。7 (a) to 7 (e) are diagrams showing an example of determination processing for a snow cover state in the embodiment of the present invention.
【図８】 従来例における着雪状態時の計測を説明する
図。FIG. 8 is a diagram for explaining measurement in a snow accretion state in a conventional example.
【図９】 従来例における空洞発生時の計測を説明する
図。FIG. 9 is a diagram for explaining measurement when a cavity is generated in a conventional example.
１ 検出ポール １a セパレータ ２ 回路手段（プリント基板） ３ センサ 21 センサ出力取込み手段 22 記憶手段 23 比較処理手段 31 発光素子 32 受光素子 1 Detection Pole 1a Separator 2 Circuit Means (Printed Circuit Board) 3 Sensor 21 Sensor Output Acquisition Means 22 Storage Means 23 Comparison Processing Means 31 Light Emitting Element 32 Light Receiving Element
Claims (3)
出点に配置され、その検出点における積雪の有無を出力
信号として送出するセンサと、 この出力信号を入力とし積雪深を出力する回路手段とを
備えた積雪計において、 前記回路手段は、設定された時刻に繰り返して前記多数の検出点に対応す
る前記センサについて連続して前記センサの出力信号を
取込む手段と、 前回のデータを記憶する手段と、 取り込んだその多数の検出点に対応するセンサについて
連続する「有」または「無」の出力信号について、連続
する「無」の出力信号があるか否かを判定して連続する
「無」の出力信号の前の地表面から連続する「有」の信
号を前回のデータと比較する積雪深さの比較値とする判
定手段と、 この比較値を前回のデータと比較し前回のデータとの差
異が測定時刻間隔内であらかじめ設定された最大積雪量
または最大溶融量を越える場合には、新たなデータを無
効にする比較判定手段と を備えた ことを特徴とする積雪
計。1. A detection pole which is erected on the ground surface, and a sensor which is arranged at a large number of detection points corresponding to the distance of the detection pole from the ground surface, and which outputs the presence or absence of snow at the detection points as an output signal. And a circuit means for receiving the output signal and outputting the snow depth, the circuit means repeatedly corresponding to the plurality of detection points at a set time.
Output signal of the sensor continuously for the sensor
And capturing means, means for storing the previous data, the sensor corresponding to the number of detection points taken
Continuous for "Yes" or "No" output signal
Continue by judging whether or not there is a “none” output signal
The "Yes" signal that continues from the ground surface before the "No" output signal
No. is compared with the previous data to determine the snow depth comparison value.
And the comparison means and this comparison value is compared with the previous data and the difference between the previous data
The maximum amount of snowfall that the difference is preset within the measurement time interval
Or, if the maximum melting amount is exceeded, no new data is available.
A snow gauge characterized in that it is provided with a comparison and determination means that is effective .
子の出力光を受光する受光素子とを含む光反射検出形の
センサである請求項１記載の積雪計。2. The snow cover meter according to claim 1, wherein the sensor is a light reflection detection type sensor including a light emitting element and a light receiving element for receiving the output light of the light emitting element.
について共通に設けられた請求項１記載の積雪計。3. The snow meter according to claim 1, wherein the comparison processing means is provided in common for a plurality of detection poles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2416434A JPH0769437B2 (en) | 1990-12-27 | 1990-12-27 | Snow cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2416434A JPH0769437B2 (en) | 1990-12-27 | 1990-12-27 | Snow cover |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04252988A JPH04252988A (en) | 1992-09-08 |
| JPH0769437B2 true JPH0769437B2 (en) | 1995-07-31 |
Family
ID=18524657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2416434A Expired - Lifetime JPH0769437B2 (en) | 1990-12-27 | 1990-12-27 | Snow cover |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0769437B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001051068A (en) * | 1999-08-17 | 2001-02-23 | Hightech Research Kk | Freezing detection sensor and its sensor element |
| GB2543690A (en) * | 2015-06-09 | 2017-04-26 | Gill Corp Ltd | A depth gauge |
| EP3312551B1 (en) * | 2016-10-24 | 2019-05-15 | Gill Corporate Limited | A depth gauge |
| US10215887B2 (en) | 2016-10-25 | 2019-02-26 | Gill Corporate Limited | Depth gauge |
| JP6853454B2 (en) * | 2017-06-23 | 2021-03-31 | 国立研究開発法人防災科学技術研究所 | Snow depth meter and snow depth measurement method using multiple optical sensors |
-
1990
- 1990-12-27 JP JP2416434A patent/JPH0769437B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04252988A (en) | 1992-09-08 |
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