JP3488562B2 - How to prevent cavitation of road surface moisture sensor - Google Patents
How to prevent cavitation of road surface moisture sensorInfo
- Publication number
- JP3488562B2 JP3488562B2 JP31582795A JP31582795A JP3488562B2 JP 3488562 B2 JP3488562 B2 JP 3488562B2 JP 31582795 A JP31582795 A JP 31582795A JP 31582795 A JP31582795 A JP 31582795A JP 3488562 B2 JP3488562 B2 JP 3488562B2
- Authority
- JP
- Japan
- Prior art keywords
- road surface
- moisture sensor
- surface moisture
- heater
- control
- 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 - Fee Related
Links
Landscapes
- Road Paving Structures (AREA)
- Control Of Temperature (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、従来の路面水分セ
ンサに内蔵されている電熱ヒ−タ回路（固定抵抗）の通
電方式の改良により、単位時間当たりの降雪量が多い場
合に生じることがある路面水分センサ上の空洞化現象の
発生防止方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention may occur when the amount of snowfall per unit time is large due to the improvement of the energization method of the electric heat heater circuit (fixed resistance) incorporated in the conventional road surface moisture sensor. The present invention relates to a method for preventing the occurrence of a cavitation phenomenon on a road surface moisture sensor.
【０００２】[0002]
【従来の技術】本出願人は先に特願平７−１１９０５４
号として、ロ−ドヒ−ティングの自動制御機構を発明し
た。この発明は、積雪寒冷地帯において、車道或は歩道
上に降雪があると、車両のスリップ事故或は歩行者の転
倒事故等の危険があるため、路面下に電熱ヒ−タ等を埋
設し自動的に降雪を融雪するロ−ドヒ−ティングの自動
制御機構である。この融雪装置は、路面の温度を検知す
る路面温度センサおよび降雪を電熱ヒ−タにより融雪し
てその水分を検知する水分センサが別々の場所に埋設さ
れており、コンクリ−トやアスファルト舗装工事を行う
場合、夫々のセンサを路面と同一平面上に設置する作業
は困難であり、また、温度センサと別の場所に埋設した
水分センサは、別の場所で検知した温度センサの温度に
より水分センサ容器内の電熱ヒ−タを制御するため、誤
差を生じる場合があったので、これら２個のセンサを１
個にまとめ、設置作業の困難さも半減させ、路面と同一
平面に埋設された１個の容器の路面側には水分センサを
設け、かつ水分センサは水分センサ上の降雪を融雪する
ために温度センサの信号により水分センサ容器内の固定
式の電熱ヒ−タに通電し加熱する方式である。2. Description of the Related Art The applicant has previously filed Japanese Patent Application No. 7-119054.
As an issue, he invented an automatic control mechanism for road heating. According to the present invention, when snow falls on a roadway or a sidewalk in a snowy cold region, there is a risk of a vehicle slip accident or a pedestrian falling accident. It is an automatic control mechanism for road heating that effectively melts snow. In this snow melting device, a road surface temperature sensor that detects the temperature of the road surface and a moisture sensor that detects the water content of the snow by melting the snow with an electric heat heater are buried in different places, and concrete and asphalt pavement work is performed. When doing so, it is difficult to install each sensor on the same plane as the road surface, and the moisture sensor embedded in a different location from the temperature sensor is Since there was a case where an error was caused because the electric heater inside was controlled,
In order to reduce the difficulty of installation work by half, install a moisture sensor on the road side of one container buried in the same plane as the road surface, and use a temperature sensor to melt the snow on the moisture sensor. In this system, a fixed electric heating heater in the moisture sensor container is energized and heated by the signal.
【０００３】従来例を図面に基づいて説明する。図１、
図２および図３は従来例のロ−ドヒ−ティングの自動制
御機構を示す。従来のロ−ドヒ−ティング自動制御機構
は、省エネルギ−で融雪することを目的としたものであ
り、寒くても降雪を検知しない間はロ−ドヒ−タに通電
されない機構を有するものである。ロ−ドヒ−タ制御盤
に設けられた作動機構により、路面水分センサからの信
号、路面温度センサからの信号により、電熱ヒ−タおよ
びロ−ドヒ−タへの通電を制御するもので、路面温度セ
ンサの信号によるロ−ドヒ−タの設定作動温度をＴ1 と
し、路面温度センサの信号による電熱ヒ−タの設定作動
温度をＴ2 とし、Ｔ1 を１℃、Ｔ2 を０．５℃に設定し
た場合について図３により説明する。A conventional example will be described with reference to the drawings. Figure 1,
2 and 3 show an automatic control mechanism for conventional road heating. The conventional road-hiding automatic control mechanism is aimed at energy-saving and melting snow, and has a mechanism in which the load heater is not energized while snow is not detected even in cold weather. . The operation mechanism provided on the load heater control panel controls the energization of the electric heat heater and the load heater by the signal from the road surface moisture sensor and the signal from the road surface temperature sensor. The set operating temperature of the road heater according to the signal of the temperature sensor is T 1 , the set operating temperature of the electric heater according to the signal of the road surface temperature sensor is T 2, and T 1 is 1 ° C. and T 2 is 0.5. The case of setting at ° C will be described with reference to FIG.
【０００４】先ず、路面水分センサにより降雪の有無を
検知する。水分有りと検知した場合は、この時点でロ−
ドヒ−タへの通電は可能となるが、もう１つの条件が満
足されなければ通電されない。即ち、路面水分センサが
水分有りと検知した場合は、この時点で電熱ヒ−タへの
通電はＯＦＦとなるが、ロ−ドヒ−タへの通電は路面温
度センサの信号が路面温度センサの設定作動温度Ｔ1 、
即ち１℃より低い場合にのみ通電される。ロ−ドヒ−タ
に通電され、舗装面上の降雪が融雪されると共に舗装道
路中に埋設された路面水分センサ容器も加熱され、路面
水分センサ容器内の路面温度センサも加熱され路面温度
センサが路面温度センサの設定作動温度Ｔ1 、即ち１℃
より高い温度を検知するとロ−ドヒ−タへの通電はＯＦ
Ｆとなる。また、路面水分センサが水分を検知しない場
合は、路面温度センサの信号が例えば０℃であってもロ
−ドヒ−タへは通電されない。しかしながら、電熱ヒ−
タの設定作動温度Ｔ2 より低いため電熱ヒ−タへの通電
は行われ路面水分センサ面および路面温度センサが加熱
される。したがって、路面水分センサ面に降雪があれ
ば、常に融雪することができる。また、路面温度センサ
も加熱されるため、路面温度センサの信号が電熱ヒ−タ
の設定作動温度Ｔ2 即ち０．５℃より高くなった場合に
は、電熱ヒ−タへの通電はＯＦＦとなる。First, the presence or absence of snowfall is detected by a road surface moisture sensor. If it is detected that there is water,
The heater can be energized, but it will not be energized unless another condition is satisfied. That is, when the road surface moisture sensor detects that there is water, the electric power to the electric heating heater is turned off at this point, but the electric power to the load heater is set by the signal from the road surface temperature sensor. Operating temperature T 1 ,
That is, electricity is supplied only when the temperature is lower than 1 ° C. The road heater is energized, the snow on the pavement is melted, the road surface moisture sensor container buried in the paved road is also heated, and the road surface temperature sensor in the road surface moisture sensor container is also heated and the road surface temperature sensor is The set operating temperature T 1 of the road surface temperature sensor, that is, 1 ° C.
If a higher temperature is detected, the load heater will be turned off.
It becomes F. If the road surface moisture sensor does not detect water, the road heater is not energized even if the signal from the road surface temperature sensor is, for example, 0 ° C. However, electric heat
Since the temperature is lower than the set operating temperature T 2 of the heater, the electric heater is energized to heat the road surface moisture sensor surface and the road surface temperature sensor. Therefore, if there is snowfall on the road surface moisture sensor surface, it is possible to always melt the snow. Further, since the road surface temperature sensor is also heated, when the signal of the road surface temperature sensor becomes higher than the set operating temperature T 2 of the electric heating heater, that is, 0.5 ° C., the power supply to the electric heating heater is turned off. Become.
【０００５】図１は従来のロ−ドヒ−ティングの自動制
御機構であり、舗装部分１０の舗装面１１と、陽極１、
陰極２および絶縁部分３とからなる路面水分センサが同
一平面になるように路面水分センサ容器４を埋設した図
を示す。更に単位時間当たりの降雪量が多い場合、降雪
面１２の下部に空洞部１３が発生している状態を示して
いる。本発明においても同様な機構が採用されるが、電
熱ヒ−タへの出力制御方法が異なるため、空洞部１３は
発生しない。路面水分センサ容器４の大きさは特に限定
されないが、一例として９０〜１１０×９０〜１１０×
４０〜６０ｍｍ程度で有る。舗装部分１０の下部には路
面上に降雪した場合に融雪するためのロ−ドヒ−タ９が
埋設され、路面水分センサ容器４の中には、路面温度セ
ンサ５および電熱ヒ−タ７等が内蔵されている。各セン
サおよび電熱ヒ−タは、図示しないリ−ド線により、路
面水分センサ容器４のリ−ド線用孔８を通りロ−ドヒ−
タ制御盤（図示せず）に連絡し、ロ−ドヒ−タ９も図示
しないリ−ド線により前記ロ−ドヒ−タ制御盤に連絡し
ている。このロ−ドヒ−タ制御盤はロ−ドヒ−タ９が埋
設されている舗装道路または舗装歩道の近傍に設けられ
ている。FIG. 1 shows a conventional road-hiding automatic control mechanism. The paving surface 11 of the paving portion 10 and the anode 1,
The figure which embedded the road surface moisture sensor container 4 so that the road surface moisture sensor which consists of the cathode 2 and the insulating part 3 may become the same plane is shown. Further, when the amount of snowfall per unit time is large, a state is shown in which a cavity 13 is generated below the snowfall surface 12. The same mechanism is adopted in the present invention as well, but the method of controlling the output to the electric heating heater is different, so that the cavity 13 is not generated. The size of the road surface moisture sensor container 4 is not particularly limited, but as an example, 90 to 110 × 90 to 110 ×
It is about 40 to 60 mm. A road heater 9 is embedded in the lower portion of the pavement portion 10 for melting snow when it snows on the road surface. In the road surface moisture sensor container 4, a road surface temperature sensor 5 and an electric heat heater 7 are provided. It is built in. Each sensor and the electric heat heater pass through a lead wire hole 8 of the road surface moisture sensor container 4 by a lead wire (not shown) and a load heater.
A loader control panel (not shown), and the load heater 9 is also connected to the load heater control panel by a lead wire (not shown). This load heater control panel is provided in the vicinity of the paved road or sidewalk in which the road heater 9 is buried.
【０００６】図２は図１の平面図で、舗装面に現れるの
はこの部分だけで有る。図２において、１は路面水分セ
ンサの陽極、２は陰極および３は絶縁部分を示す。この
陽極、陰極および絶縁部分からなる路面水分センサは路
面に露出しており、この上を自動車或は人が通り踏みつ
けるため、衝撃に耐えられるように路面水分センサ容器
４内において補強されている。FIG. 2 is a plan view of FIG. 1, and only this portion appears on the pavement surface. In FIG. 2, 1 is an anode of the road surface moisture sensor, 2 is a cathode, and 3 is an insulating portion. The road surface moisture sensor consisting of the anode, the cathode and the insulating portion is exposed on the road surface, and is reinforced in the road surface moisture sensor container 4 so as to withstand an impact because an automobile or a person walks on it.
【０００７】この方式は、単位時間当たりの降雪量が通
常の場合は良好に作動し問題ないが、単位時間当たりの
降雪量が多い場合には路面水分センサ容器内の電熱ヒ−
タによる加熱が大き過ぎるため、路面水分センサ容器直
上の降雪は電熱ヒ−タにより徐々に融解するが、路面水
分センサ容器周囲の積もった降雪と、路面水分センサの
更に上方にある降雪はブリッジを形成し、路面水分セン
サ容器の上部に空洞化現象が発生することがある。This method works well when the amount of snowfall per unit time is normal, and there is no problem, but when there is a large amount of snowfall per unit time, the electric heat heat inside the road surface moisture sensor container is used.
Since the heating by the heater is too large, the snowfall directly above the road surface moisture sensor container gradually melts due to the electric heater, but the snowfall around the road surface moisture sensor container and the snowfall above the road surface moisture sensor container form a bridge. When formed, a cavitation phenomenon may occur in the upper portion of the road surface moisture sensor container.
【０００８】更に電熱ヒ−タにより融解した水分は、路
面水分センサ容器周囲の雪に毛細管現象により吸収され
る結果、路面水分センサ表面は電熱ヒ−タの発熱により
乾燥した状態となり、路面に積雪があるにもかかわらず
路面水分センサからの信号は積雪なしという信号とな
り、誤報を生じる結果となる。Further, the water melted by the electric heat heater is absorbed into the snow around the road surface moisture sensor container by the capillary phenomenon, and as a result, the surface of the road surface moisture sensor becomes dry due to the heat generated by the electric heat heater, and snow is accumulated on the road surface. Despite the presence, the signal from the road surface moisture sensor becomes a signal that there is no snow, resulting in a false alarm.
【０００９】[0009]
【発明が解決しようとする課題】本発明はこれらの問題
点を解決し、路面水分センサ上の空洞化現象の発生を防
止し、舗装面上の降雪を融雪することができる路面水分
センサの空洞化現象の防止方法を提供することを目的と
する。The present invention solves these problems, prevents the occurrence of a cavitation phenomenon on the road surface moisture sensor, and can melt the snowfall on the pavement surface of the road surface moisture sensor. It is an object of the present invention to provide a method for preventing the oxidization phenomenon.
【００１０】上記問題点を解決し、本発明の目的を達成
するため本発明に係る路面水分センサの空洞化現象の防
止方法は次のように構成したことを特徴とする。すなわ
ち、舗装面の降雪を融雪するため、路面温度センサ、路
面水分センサおよび各センサの信号により舗装面下に埋
設したロードヒータ等に通電する制御盤とを備え、舗装
面と同一平面に陽極と陰極と絶縁部分とからなる路面水
分センサを備え、且つこの路面水分センサを支持する路
面水分センサ容器内に路面水分センサ上の降雪を融雪す
るための電熱ヒータとを内蔵させた自動融雪機構におけ
る路面水分センサの空洞化現象の防止方法において、路
面温度センサおよび路面水分センサからの信号を処理す
るセンサ入力演算回路、制御条件設定回路、制御回路、
ロードヒータ用制御周期設定回路、電熱ヒータ制御周期
設定回路および出力演算回路の通電制御回路を設けるこ
とによりロードヒータの１サイクル周期内に、上記通電
制御回路で得られた出力％時間だけロードヒータおよび
電熱ヒータが同時に出力するように制御し、更に、電熱
ヒータは電熱ヒータの通電サイクル内に上記通電制御回
路で得られた出力％だけ出力するように制御し、路面水
分センサの表面温度を路面温度に追従した自己温度制御
を行うことを可能とすることにより、単位時間当たりの
降雪量が多い場合に生じる路面水分センサ上の空洞化現
象を防止することを特徴とする。具体的には路面水分セ
ンサ用電熱ヒータ回路の通電時間を１サイクル当たりｔ
秒間とするサイクル制御方式を路面水分センサ用電熱ヒ
ータ制御周期設定回路に用い、ロードヒータの出力％に
連動した出力とすることにより路面水分センサ上の空洞
化現象を防止することを特徴とする。In order to solve the above problems and achieve the object of the present invention, the method for preventing the cavitation phenomenon of the road surface moisture sensor according to the present invention is configured as follows. That is, in order to melt the snowfall on the pavement surface, a road surface temperature sensor, a road surface moisture sensor, and a control panel that energizes the road heater and the like buried under the pavement surface according to the signals of each sensor, and an anode on the same plane as the pavement surface comprising a road surface moisture sensor comprising a cathode and an insulating portion, and put into an automatic snow melting mechanism is built in the electric heater for melting snow snowfall on the road surface moisture sensor to the road surface moisture sensor in the container for supporting the road surface moisture sensor
In a method of preventing a cavitation phenomenon of a road surface moisture sensor, a sensor input arithmetic circuit that processes signals from a road surface temperature sensor and a road surface moisture sensor, a control condition setting circuit, a control circuit,
By providing a load heater control cycle setting circuit, an electric heater control cycle setting circuit, and an energization control circuit for an output calculation circuit , the above energization is performed within one cycle of the load heater.
The load heater and the output% time obtained by the control circuit
The electric heater is controlled to output at the same time.
The heater is turned on and off during the energization cycle of the electric heater.
When the amount of snowfall per unit time is large, it is possible to perform self-temperature control that follows the surface temperature of the road surface moisture sensor by controlling to output only the output% obtained on the road. It is characterized by preventing the cavitation phenomenon on the road surface moisture sensor that occurs. Specifically, the energizing time of the electric heater circuit for the road surface moisture sensor is t per cycle.
A cycle control system of 2 seconds is used for an electric heater control cycle setting circuit for a road surface moisture sensor, and an output linked to the output% of the load heater is used to prevent a cavitation phenomenon on the road surface moisture sensor.
【００１１】[0011]
【発明の実施の形態】本発明の路面水分センサの空洞化
現象の防止方法においても同様な路面温度センサ、路面
水分センサ、路面水分センサ容器、電熱ヒ−タおよびロ
−ドヒ−タ等が用いられるが、空洞化現象を防止するた
め図４および図５に示される如く異なる制御機構が用い
られる。BEST MODE FOR CARRYING OUT THE INVENTION In the method for preventing the cavitation phenomenon of a road surface moisture sensor according to the present invention, the same road surface temperature sensor, road surface moisture sensor, road surface moisture sensor container, electric heat heater and load heater are used. However, different control mechanisms are used as shown in FIGS. 4 and 5 to prevent the cavitation phenomenon.
【００１２】図４により本発明の路面水分センサの空洞
化現象の防止方法について説明する。舗装道路表面と同
一表面になるように設けられた路面水分センサ容器４に
内蔵される路面水分センサ１aおよび路面温度センサ５
の信号をリード線（図示せず）によりリード線用孔８を
通して道路脇に設けられたロードヒータ制御盤（図示せ
ず）に送信する。ロードヒータ制御盤はこの送信された
信号により、水分センサ容器４内の電熱ヒータ７への通
電およびロードヒータ９への通電をＯＮ−ＯＦＦする。
本発明の路面水分センサの空洞化現象の防止方法におい
ては、路面水分センサ１ａおよび路面温度センサ５の信
号により直接電熱ヒータ７への通電およびロードヒータ
９への通電をＯＮ−ＯＦＦするのではなく、それらのア
ナログ信号を先ずセンサ入力演算回路に入力する。セン
サ入力演算回路は、このアナログ信号をデジタル信号に
変換し制御条件設定回路に入力する。制御条件設定回路
では設定した値とセンサ入力値を比較し、比較された変
換信号．は制御回路に入力され、設定されたフローチャ
ートの経路に従って制御データを出力する。制御回路か
ら出力された制御データは出力演算回路へ入力されると
ともに、前記ロードヒータ制御盤内に設けられたロード
ヒータ用制御周期設定回路で設定された制御周期の値と
演算され、ロードヒータのＯＮ−ＯＦＦを出力する．ま
た制御データと路面温度を比較し、路面温度が上昇し設
定値に達した場合は制御周期内でも停止する回路となっ
ている。この出力回路は制御回路で得られた出力％を基
に、t分周期内でその出力％の分だけ出力する。また以
上のロードヒータの出力制御と平行して路面水分センサ
内の電熱ヒータのＯＮ−ＯＦＦ制御もこの出力演算回路
で行う。従来は電熱ヒータ出力の調整は直列に入れた可
変抵抗器で行っていたが、本発明においては路面水分セ
ンサ用電熱ヒータ制御周期設定回路を設けサイクル制御
方式を採用し１サイクルをt秒間とし、出力時間はロー
ドヒータの１周期t分の出力％と同じ％で出力する制御
回路とした。A method of preventing the cavitation phenomenon of the road surface moisture sensor according to the present invention will be described with reference to FIG. Road surface moisture sensor 1a and road surface temperature sensor 5 built in a road surface moisture sensor container 4 provided on the same surface as the paved road surface
Transmitting a signal to the leads (not shown) by the load heater control panel provided on the roadside via a lead wire hole 8 (not shown). The load heater control panel turns on / off the energization of the electric heater 7 and the energization of the load heater 9 in the moisture sensor container 4 based on the transmitted signal.
In the method for preventing the cavitation phenomenon of the road surface moisture sensor according to the present invention, the energization to the electric heater 7 and the load heater 9 are not turned on and off directly by the signals of the road surface moisture sensor 1a and the road surface temperature sensor 5. , it enters the first sensor input arithmetic circuit the analog signals. The sensor input arithmetic circuit converts this analog signal into a digital signal and inputs it to the control condition setting circuit. Control the control condition setting circuit compares the values and sensor input value set, the compared converted signal. Is input to the control circuit and outputs control data in accordance with the set route of the flowchart. The control data output from the control circuit is input to the output calculation circuit, and is also calculated with the value of the control cycle set by the load heater control cycle setting circuit provided in the load heater control panel to calculate the load heater. Outputs ON-OFF. In addition, the control data is compared with the road surface temperature, and when the road surface temperature rises and reaches a set value, the circuit is stopped even within the control cycle. Based on the output% obtained by the control circuit, this output circuit outputs only the output% within the period of t minutes. Further, in parallel with the above output control of the load heater , ON / OFF control of the electric heater in the road surface moisture sensor is also performed by this output calculation circuit. Conventionally, the adjustment of the electric heater output was performed by a variable resistor inserted in series, but in the present invention, an electric heater control period setting circuit for a road surface moisture sensor is provided and a cycle control system is adopted to set one cycle to t seconds, The output time is a control circuit that outputs the same% as the output% for one cycle t of the load heater.
【００１３】次に、図５によりサイクル制御方式を具体
的に説明する。図５の上段に示すロ−ドヒ−タの出力の
サイクルを、ロ−ドヒ−タ用制御周期設定回路により１
サイクル６分と設定し、出力演算回路において、路面温
度センサおよび路面水分センサの信号による制御条件設
定回路からの信号と比較して、ロ−ドヒ−タの全出力の
６０％で良いと出力演算された場合、ロ−ドヒ−タの出
力は１サイクル６分間の６０％、即ち３．６分間出力さ
れる。また、図５の下段に示す電熱ヒ−タの出力のサイ
クルを路面水分センサ用電熱ヒ−タ制御周期設定回路に
おいて５秒間と設定した場合、出力演算回路において電
熱ヒ−タの通電サイクルもロ−ドヒ−タ用の出力％と連
動させ、電熱ヒ−タの通電サイクルである５秒間の６０
％、即ち３秒間通電される方式とした。Next, the cycle control system will be specifically described with reference to FIG. The output cycle of the load heater shown in the upper part of FIG.
The cycle is set to 6 minutes, and the output calculation circuit calculates that 60% of the total output of the road heater is sufficient as compared with the signal from the control condition setting circuit based on the signals of the road surface temperature sensor and the road surface moisture sensor. If this is done, the load heater output is 60% of one cycle of 6 minutes, that is, 3.6 minutes. Further, when the output cycle of the electric heat heater shown in the lower part of FIG. 5 is set to 5 seconds in the electric heat heater control period setting circuit for the road surface moisture sensor, the energizing cycle of the electric heat heater is also changed in the output arithmetic circuit. -In conjunction with the output% for the heater, 60 for 5 seconds, which is the energization cycle of the electric heater.
%, That is, a system in which electricity is supplied for 3 seconds.
【００１４】[0014]
【発明の効果】以上説明してきたように、本発明は上述
のとおり構成されているため、次に記載するような効果
を奏する。
１）路面水分センサ用電熱ヒ−タの出力をロ−ドヒ−タ
への通電サイクルと連動するサイクル制御方式としたた
め、路面温度センサの極端な温度変化が防止でき、路面
温度に追従した路面温度信号を発信することができる。
２）路面水分センサ用電熱ヒ−タの出力をロ−ドヒ−タ
への通電サイクルと連動するサイクル制御方式としたた
め、路面水分センサ表面の極端な温度変化が防止でき、
空洞化現象の発生を防止できる。As described above, since the present invention is configured as described above, it has the following effects. 1) Because the output of the electric heat heater for the road surface moisture sensor is a cycle control system that works in conjunction with the energization cycle to the road heater, extreme temperature changes of the road surface temperature sensor can be prevented, and the road surface temperature that follows the road surface temperature can be prevented. A signal can be emitted. 2) Since the output of the electric heat heater for the road surface moisture sensor is a cycle control system that works in conjunction with the energization cycle to the road heater, it is possible to prevent extreme temperature changes on the surface of the road surface moisture sensor,
It is possible to prevent the cavitation phenomenon from occurring.
【図１】従来のロ−ドヒ−ティング自動制御機構を示
す。降雪面の下部に空洞部が発生している。本発明にお
いても同様な機構が採用されるが、電熱ヒ−タへの出力
制御方法が異なるため、空洞部は発生しない。FIG. 1 shows a conventional road heating automatic control mechanism. There is a cavity at the bottom of the snowfall surface. The same mechanism is adopted in the present invention as well, but the method of controlling the output to the electric heating heater is different, so that no cavity is generated.
【図２】図１の平面図。FIG. 2 is a plan view of FIG.
【図３】従来のロ−ドヒ−ティング自動制御フロ−チャ
−ト。FIG. 3 is a conventional road heating automatic control flow chart.
【図４】本発明の路面水分センサの空洞化現象の防止方
法に採用されるロ−ドヒ−タおよび電熱ヒ−タに通電す
る制御機構のフロ−チャ−ト。FIG. 4 is a flow chart of a control mechanism for energizing a load heater and an electric heat heater used in a method for preventing a cavitation phenomenon of a road surface moisture sensor according to the present invention.
【図５】本発明のサイクル制御を示す説明図。FIG. 5 is an explanatory diagram showing cycle control of the present invention.
１ 陽極 １ａ 路面水分センサ ２ 陰極、 ３ 絶縁部分、 ４ 路面水分センサ容器、 ５ 路面温度センサ、 ７ 電熱ヒ−タ、 ８ リ−ド線用孔、 ９ ロ−ドヒ−タ、 １０ 舗装部分、 １１ 舗装面、 １２ 降雪面、 １３ 空洞部、 Ｔ1 路面温度センサのロ−ドヒ−タ設定作動温度、 Ｔ2 路面温度センサの電熱ヒ−タ設定作動温度。1 Anode 1a Road surface moisture sensor 2 Cathode, 3 Insulation part, 4 Road surface moisture sensor container, 5 Road surface temperature sensor, 7 Electric heating heater, 8 Lead wire hole, 9 Road heater, 10 Pavement part, 11 Pavement surface, 12 Snowfall surface, 13 Cavity, T 1 Road surface temperature sensor load heater set operating temperature, T 2 Road surface temperature sensor electric heater set operating temperature.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 鈴木 節雄 宮城県仙台市太白区郡山一丁目２番１号 北日本電線株式会社内 (56)参考文献 特開 平３−95324（ＪＰ，Ａ) 特開 平５−51910（ＪＰ，Ａ) 特公 昭62−37161（ＪＰ，Ｂ１) (58)調査した分野(Int.Cl.7，ＤＢ名) G05D 23/00 - 23/32 E01C 1/00 - 17/00 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Setsuo Suzuki 1-2-1, Koriyama, Taichiro-ku, Sendai-shi, Miyagi Kita Nippon Electric Cable Co., Ltd. (56) Reference JP-A-3-95324 (JP, A) JP Hei 5-51910 (JP, A) JPB 62-37161 (JP, B1) (58) Fields investigated (Int.Cl. 7 , DB name) G05D 23/00-23/32 E01C 1/00-17 / 00
Claims (2)
センサ、路面水分センサおよび各センサの信号により舗
装面下に埋設したロードヒータ等に通電する制御盤とを
備え、舗装面と同一平面に陽極と陰極と絶縁部分とから
なる路面水分センサを備え、且つこの路面水分センサを
支持する路面水分センサ容器内に路面水分センサ上の降
雪を融雪するための電熱ヒータとを内蔵させた自動融雪
機構における路面水分センサの空洞化現象の防止方法に
おいて、 路面温度センサおよび路面水分センサからの信号を処理
するセンサ入力演算回路、制御条件設定回路、制御回
路、ロードヒータ用制御周期設定回路、電熱ヒータ制御
周期設定回路および出力演算回路の通電制御回路を設け
ることによりロードヒータの１サイクル周期内に、上記
通電制御回路で得られた出力％時間だけロードヒータお
よび電熱ヒータが同時に出力するように制御し、更に、
電熱ヒータは電熱ヒータの通電サイクル内に上記通電制
御回路で得られた出力％だけ出力するように制御し、路
面水分センサの表面温度を路面温度に追従した自己温度
制御を行うことを可能とすることにより、単位時間当た
りの降雪量が多い場合に生じる路面水分センサ上の空洞
化現象を防止することを特徴とする路面水分センサの空
洞化現象の防止方法。1. In order to melt snowfall on a pavement surface, a road surface temperature sensor, a road surface moisture sensor, and a control panel for energizing a road heater or the like buried under the pavement surface according to signals from the sensors are provided, and the same surface as the pavement surface. An automatic snowmelter having a road surface moisture sensor consisting of an anode, a cathode and an insulating portion, and an electric heater for melting snowfall on the road surface moisture sensor in a road surface moisture sensor container supporting the road surface moisture sensor. Method for preventing cavitation of road surface moisture sensor in mechanism <br /> Sensor input arithmetic circuit for processing signals from road surface temperature sensor and road surface moisture sensor, control condition setting circuit, control circuit, load heater control By providing the cycle setting circuit, the electric heater control cycle setting circuit, and the energization control circuit of the output arithmetic circuit , the above-mentioned operation can be performed within one cycle of the load heater.
The load heater and the output% time obtained by the energization control circuit
And the electric heater is controlled to output at the same time.
The electric heater has the above-mentioned energization control during the energization cycle of the electric heater.
When the amount of snowfall per unit time is large by controlling to output only the output% obtained by the control circuit and enabling the self-temperature control that follows the surface temperature of the road surface moisture sensor to the road surface temperature. A method for preventing the cavitation phenomenon of a road surface moisture sensor, comprising preventing the cavitation phenomenon on a road surface moisture sensor.
間を１サイクル当たり、ｔ秒間とするサイクル制御方式
を路面水分センサ用電熱ヒータ制御周期設定回路に用
い、ロードヒータの出力％に連動した出力とすることを
特徴とする請求項１に記載の路面水分センサの空洞化現
象の防止方法。2. An electric heater heater control cycle setting circuit for a road surface moisture sensor, which uses a cycle control system in which the energization time of the electric heater circuit for a road surface moisture sensor is t seconds per cycle , and an output linked to the output% of the load heater is used. To do
The method for preventing a cavitation phenomenon of a road surface moisture sensor according to claim 1 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31582795A JP3488562B2 (en) | 1995-11-10 | 1995-11-10 | How to prevent cavitation of road surface moisture sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31582795A JP3488562B2 (en) | 1995-11-10 | 1995-11-10 | How to prevent cavitation of road surface moisture sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09134221A JPH09134221A (en) | 1997-05-20 |
| JP3488562B2 true JP3488562B2 (en) | 2004-01-19 |
Family
ID=18070048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31582795A Expired - Fee Related JP3488562B2 (en) | 1995-11-10 | 1995-11-10 | How to prevent cavitation of road surface moisture sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3488562B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007132883A (en) * | 2005-11-14 | 2007-05-31 | Nagoya Electric Works Co Ltd | Method for detecting water on road surface, and device therefor |
| KR101381410B1 (en) * | 2013-01-04 | 2014-04-18 | (주) 동서엔지니어링 | One-behavior 3d girder bridge |
| CN109901639B (en) * | 2019-03-30 | 2020-08-18 | 中国空气动力研究与发展中心低速空气动力研究所 | Electric heating ice prevention/removal control system structure of airplane model |
-
1995
- 1995-11-10 JP JP31582795A patent/JP3488562B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09134221A (en) | 1997-05-20 |
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