JP2001174473A - Motor vehicle traffic measuring device - Google Patents
Motor vehicle traffic measuring deviceInfo
- Publication number
- JP2001174473A JP2001174473A JP35735899A JP35735899A JP2001174473A JP 2001174473 A JP2001174473 A JP 2001174473A JP 35735899 A JP35735899 A JP 35735899A JP 35735899 A JP35735899 A JP 35735899A JP 2001174473 A JP2001174473 A JP 2001174473A
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- Prior art keywords
- vehicle traffic
- vehicle
- measuring device
- magnetic field
- road surface
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- Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、道路交通管制や駐
車場管理等に用いる車両の通行検知や通行量の計測等の
ための車両通行計測装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle traffic measuring device for detecting traffic of a vehicle and measuring a traffic volume used for road traffic control, parking lot management and the like.
【０００２】[0002]
【従来の技術】従来、道路交通管制に関する車両通行計
測技術は、愛知県の場合、約１０年前まではフラックス
ゲート磁界センサによる車体残留磁気検知方式が採用さ
れていたが、交流給電や消費電力が大きいなどの問題が
あり、その後現在まで、道路面上空５．５ｍに位置した
水平ポールからの超音波発信と反射波の受信による信号
処理の方式が採用されている。2. Description of the Related Art Conventionally, in the case of Aichi Prefecture, a vehicle gate residual magnetism detection method using a fluxgate magnetic field sensor was adopted as a vehicle traffic measurement technology for road traffic control until about 10 years ago. The signal processing method by transmitting ultrasonic waves and receiving reflected waves from a horizontal pole located 5.5 m above the road surface has been adopted until now.
【０００３】この超音波方式は、超音波のドプラー効果
により車両速度および車体長を計測し、光ファイバーに
よる伝送ネットワークで中央の管制コンピュータに信号
を集中させている。In this ultrasonic system, a vehicle speed and a vehicle length are measured by the Doppler effect of ultrasonic waves, and signals are concentrated on a central control computer through a transmission network using optical fibers.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、この超
音波方式の車両検知装置の設置状況は、１台あたりの設
置が高価であるため、予算面の制約により、愛知県の場
合、その設置段数は設置必要箇所総数の１０パーセント
以下であるのが現状である。しかも、この車両検知装置
は主要道路のみに設置されており、実施すべき生活道路
の交通計測は行われていないのが現状である。However, the installation status of this ultrasonic vehicle detection device is expensive because the installation per vehicle is expensive, so in the case of Aichi Prefecture due to budget constraints, the number of installation stages is limited. At present, it is 10% or less of the total number of locations required for installation. In addition, this vehicle detection device is installed only on the main road, and at present, traffic measurement on a living road to be performed is not performed.
【０００５】したがって、超音波方式より高精度で、か
つ、生活道路等にも簡単に設置できる低価格の車両通行
計測装置の開発が要求されている。[0005] Therefore, there is a need for the development of a low-cost vehicle traffic measuring device that is more accurate than the ultrasonic method and can be easily installed on a living road or the like.
【０００６】一方、上述の車両通行の固定点検出ネット
ワークとは別に、人手による交通量調査が年間を通じて
行われているが、人件費が高いこと、実施に当たって天
候や時間帯の制限が大きいことなどの問題があり、それ
による調査は不十分である。[0006] On the other hand, apart from the above-mentioned vehicle traffic fixed point detection network, manual traffic volume surveys are conducted throughout the year. However, labor costs are high, and the restrictions on weather and time zones in implementing the survey are large. And the investigation is insufficient.
【０００７】したがって、電源自立型で可搬設置が可能
な車両通行計測装置による交通量調査の自動化が要求さ
れている。[0007] Therefore, there is a demand for automation of traffic volume surveys by a vehicle traffic measurement device that is self-contained and can be installed in a portable manner.
【０００８】本発明は、上記状況に鑑みて、簡便で、設
置も容易な車両通行計測装置を提供することを目的とす
る。The present invention has been made in view of the above circumstances, and has as its object to provide a vehicle traffic measuring device that is simple and easy to install.
【０００９】[0009]
【課題を解決するための手段】本発明は、上記目的を達
成するために、〔１〕車両通行計測装置において、磁界
センサと信号処理装置と記録装置と電源とそれらを内蔵
する非磁性材料の道路面設置鋲とを具備することを特徴
とする。According to the present invention, in order to achieve the above object, there is provided [1] a vehicle traffic measuring device which comprises a magnetic field sensor, a signal processing device, a recording device, a power supply, and a non-magnetic material containing them. And a road surface setting stud.
【００１０】〔２〕上記〔１〕記載の車両通行計測装置
において、前記磁界センサは磁気インピーダンス効果に
よる磁界センサであることを特徴とする。[2] In the vehicle traffic measuring device according to the above [1], the magnetic field sensor is a magnetic field sensor based on a magnetic impedance effect.
【００１１】〔３〕上記〔１〕記載の車両通行計測装置
において、前記道路面設置鋲は直径が略３００ｍｍ以
下、高さが略２２ｍｍ以下であることを特徴とする。[3] In the vehicle traffic measuring device according to the above [1], the road surface setting studs have a diameter of about 300 mm or less and a height of about 22 mm or less.
【００１２】〔４〕上記〔１〕記載の車両通行計測装置
において、前記磁界センサは道路に沿って２個配置さ
れ、この磁界センサの検出信号の信号処理によって車両
の通過方向、通過速度、車両の車体長、通過加速度を計
測することを特徴とする。[4] In the vehicle traffic measuring device according to the above [1], the two magnetic field sensors are arranged along a road, and the direction of the vehicle, the speed of the vehicle, the speed of the vehicle, The vehicle length and the passing acceleration are measured.
【００１３】〔５〕上記〔１〕記載の車両通行計測装置
において、前記磁界センサの出力電圧を交流結合回路
と、絶対値回路と、比較回路とを通してパルス電圧列に
変換し、パルス間隔が０．４秒以内のパルス群は１台の
車両の磁気信号であると判定することを特徴とする。[5] In the vehicle traffic measuring device according to [1], the output voltage of the magnetic field sensor is converted into a pulse voltage train through an AC coupling circuit, an absolute value circuit, and a comparison circuit, and the pulse interval is set to 0. The pulse group within 4 seconds is determined to be a magnetic signal of one vehicle.
【００１４】〔６〕上記〔１〕記載の車両通行計測装置
において、前記電源は電池と薄型蓄電器の組み合わせを
用いることを特徴とする。[6] In the vehicle traffic measuring device according to the above [1], the power supply uses a combination of a battery and a thin battery.
【００１５】〔７〕上記〔６〕記載の車両通行計測装置
において、前記電池は乾電池又は太陽電池であることを
特徴とする。[7] In the vehicle traffic measuring device according to the above [6], the battery is a dry battery or a solar battery.
【００１６】〔８〕上記〔１〕記載の車両通行計測装置
において、前記信号処理装置はマイクロコンピュータを
有し、前記記録装置は半導体メモリからなることを特徴
とする。[8] In the vehicle traffic measuring device according to the above [1], the signal processing device has a microcomputer, and the recording device comprises a semiconductor memory.
【００１７】[0017]
〔９〕上記〔１〕記載の車両通行計測装置
において、前記道路面設置鋲には発信装置及び非金属窓
を備え、前記記録装置の情報を、前記道路面設置鋲の非
金属窓を通して無線によって前記道路面設置外部に発信
することを特徴とする。[9] In the vehicle traffic measurement device according to [1], the road surface installation stud includes a transmitting device and a non-metal window, and information of the recording device is wirelessly transmitted through the non-metal window of the road surface installation stud. The information is transmitted outside the road surface installation.
【００１８】[0018]
【発明の実施の形態】以下、本発明の実施の形態につい
て詳細に説明する。Embodiments of the present invention will be described below in detail.
【００１９】本発明は、厚さ２２ｍｍ以下のアルミ合金
鋲の内部に、高感度で消費電力の小さい磁界センサであ
る磁気インピーダンス効果形磁界センサと、信号処理装
置としてのマイクロコンピュータ、記憶装置としての半
導体ＩＣメモリ、電源としての乾電池等を有する車両通
行計測装置を構成したものである。According to the present invention, a magnetic impedance effect type magnetic field sensor, which is a magnetic field sensor having high sensitivity and low power consumption, is provided inside an aluminum alloy stud having a thickness of 22 mm or less, a microcomputer as a signal processing device, and a storage device as a storage device. The vehicle traffic measuring device includes a semiconductor IC memory, a dry battery as a power supply, and the like.
【００２０】磁気インピーダンス効果形磁界センサは、
本願発明者により、既に例えば、特開平９−３２９６５
５号公報、特開平９−１３３７４２号公報などに開示さ
れている。A magnetic impedance effect type magnetic field sensor is
The inventors of the present application have already disclosed, for example, Japanese Patent Application Laid-Open No. 9-32965.
No. 5, JP-A-9-133742 and the like.
【００２１】図７は本発明に適用される磁気インピーダ
ンス効果形磁界センサの一例を示す図である。FIG. 7 is a diagram showing an example of a magneto-impedance effect type magnetic field sensor applied to the present invention.
【００２２】この図において、例えば、Ｑ1 〜Ｑ7 は７
４ＡＣ０４ＣＭＯＳインバータ、Ａｍｐ（１５）はＡＤ
５２４、アナログスイッチ（１４）は７４ＨＣ０６６、
Ｒ1は５．１ｋΩ、Ｒ2 は３ｋΩ、Ｒ3 は２００Ω、Ｒ
4 ，Ｒ5 は５１ｋΩ、Ｒ6 ，Ｒ7 は２ｋΩ、Ｒ8 は３ｋ
Ω、Ｃ1 〜Ｃ5 は１００ｐＦ、ピックアップコイル（１
３）は３０巻回、フィードバックコイル（１６）は５０
巻回である。In this figure, for example, Q 1 to Q 7 are 7
4AC04CMOS inverter, Amp (15) is AD
524, the analog switch (14) is 74HC066,
R 1 is 5.1K, R 2 is 3 k [Omega, R 3 is 200 [Omega, R
4, R 5 is 51kΩ, R 6, R 7 is 2 k.OMEGA, R 8 is 3k
Ω, C 1 to C 5 are 100 pF, pickup coil (1
3) is 30 turns and the feedback coil (16) is 50 turns
It is winding.
【００２３】図７に示すように、零磁歪アモルファスワ
イヤ（ＦｅＣｏＳｉＢ、３０μｍ径、２ｍｍ長）１１を
用いた。このコイルピックアップ方式のＭＩセンサ１０
は、バイアス磁界印加が不要なため消費電力が従来型の
ＭＩセンサよりさらに小さくなり（２０ｍＷ以下）、誘
導電圧検出方式にしたことにより、アモルファスワイヤ
抵抗分の温度変動の影響を受けにくくなった。As shown in FIG. 7, a zero magnetostrictive amorphous wire (FeCoSiB, 30 μm diameter, 2 mm length) 11 was used. This coil pickup type MI sensor 10
Since the power consumption is further reduced (20 mW or less) compared to the conventional MI sensor because no bias magnetic field application is required, and the induction voltage detection method is used, it is less affected by the temperature fluctuation of the amorphous wire resistance.
【００２４】更に、出力パルス電圧をピークホールドす
る回路１２にアナログスイッチ１４を用いたことによ
り、従来のダイオード検波方式に比べて信号処理回路部
分での温度変動が大幅に改善されている。そのためフル
スケール±１Ｏｅに対して、３０℃から８０℃までのゼ
ロ磁界出力の温度変動が０．０２％ＦＳ／℃という高安
定性が得られている。この優れた温度安定性および低消
費電力性は、温度変動の大きな路上で、独立電源による
動作が要求される本発明の車両通行計測装置のセンサと
して好適である。Further, by using the analog switch 14 for the circuit 12 for peak-holding the output pulse voltage, the temperature fluctuation in the signal processing circuit portion is greatly improved as compared with the conventional diode detection system. Therefore, high stability is obtained in which the temperature fluctuation of the zero magnetic field output from 30 ° C. to 80 ° C. is 0.02% FS / ° C. with respect to the full scale ± 1 Oe. This excellent temperature stability and low power consumption is suitable as a sensor of the vehicle traffic measurement device of the present invention that requires operation by an independent power supply on a road with large temperature fluctuations.
【００２５】図１は本発明の第１実施例を示す車両通行
計測装置の構造を示す図であり、図１（ａ）はその断面
図、図１（ｂ）はその底面図である。FIG. 1 is a view showing the structure of a vehicle traffic measuring device according to a first embodiment of the present invention. FIG. 1 (a) is a sectional view thereof, and FIG. 1 (b) is a bottom view thereof.
【００２６】この図において、直径３００ｍｍ、中心の
高さ２２ｍｍの円盤型アルミニウム部材２の内部に１４
０ｍｍ四方、高さ１３ｍｍの空間３を形成し、底部は厚
さ２ｍｍのアルミニウム板４で密閉する構造であり、１
０トンの車両重量に耐えることができる道路面設置鋲１
を作製する。その道路面設置鋲１の内部空間３に２ｍｍ
長アモルファスワイヤヘッドをもつＣＭＯＳ・ＩＣマル
チバイブレータ形ＭＩセンサ（磁界センサ）５（厚さ１
０ｍｍ、幅５５ｍｍ、長さ７５ｍｍのプラスチックケー
スに内蔵）、信号処理装置としてのマイクロコンピュー
タ（電源電流２ｍＡ）と記憶装置としての半導体ＩＣメ
モリ６、電源７としての１．５Ｖ単３乾電池４本を設置
した車両通行計測装置が示されている。なお、電源とし
ては、電池と薄型蓄電器の組み合わせを用いることがで
きる。また、前記電池は乾電池又は太陽電池を用いるこ
とができる。In this figure, 14 mm is placed inside a disc-shaped aluminum member 2 having a diameter of 300 mm and a center height of 22 mm.
A space 3 of 0 mm square and 13 mm height is formed, and the bottom is sealed with a 2 mm thick aluminum plate 4.
Road surface mounting studs 1 that can withstand 0 tons of vehicle weight
Is prepared. 2 mm in the internal space 3 of the road surface installation stud 1
CMOS / IC multivibrator type MI sensor (magnetic field sensor) 5 having a long amorphous wire head (thickness 1
0 mm, 55 mm in width and 75 mm in length in a plastic case), a microcomputer (power supply current: 2 mA) as a signal processing device, a semiconductor IC memory 6 as a storage device, and four 1.5 V AA batteries as a power supply 7. The installed vehicle traffic measurement device is shown. Note that as the power source, a combination of a battery and a thin battery can be used. The battery may be a dry battery or a solar battery.
【００２７】図２は本発明の第１実施例のＭＩセンサの
出力波形およびその出力波形を絶対値回路・コンパレー
タ回路でパルス列に変換した波形の検出例を示す図であ
り、図２（ａ）は図１で示した道路面設置鋲１からなる
車両通行計測装置を一方通行道路に設置して、車両通過
時に得たＭＩセンサの出力波形図、図２（ｂ）はその出
力波形を絶対値回路・コンパレータ回路でパルス列に変
換した波形図である。FIG. 2 is a diagram showing an output waveform of the MI sensor according to the first embodiment of the present invention and a detection example of a waveform obtained by converting the output waveform into a pulse train by an absolute value circuit / comparator circuit. Fig. 2 is an output waveform diagram of the MI sensor obtained when the vehicle traffic measuring device including the road surface mounting studs 1 shown in Fig. 1 is installed on a one-way road, and the output waveform obtained when the vehicle passes is shown in Fig. 2 (b). FIG. 4 is a waveform diagram converted into a pulse train by a circuit / comparator circuit.
【００２８】車両が連続して通過する場合、２台の車両
の通過時間間隔は速度によらず０．４〜０．５秒以上で
ある。これは、運転者が障害物を発見してブレーキをか
けるまでの時間であり、人間の属性であると言われてい
る。When vehicles pass continuously, the passing time interval between the two vehicles is at least 0.4 to 0.5 seconds regardless of the speed. This is the time it takes for the driver to find an obstacle and apply the brake, and is said to be a human attribute.
【００２９】そこで、「マイクロコンピュータの入力電
圧のパルス列に対して、パルス間隔が０．４秒以下であ
れば１台のクルマの信号群である」との判定ルールを課
し、半導体ＩＣメモリに各車両の通過時刻を収録する。
このデータは測定後パーソナルコンピュータで統計表示
される。Therefore, a determination rule is imposed that a pulse train of an input voltage of a microcomputer has a pulse interval of 0.4 seconds or less, a signal group of one car is imposed. Record the passing time of each vehicle.
This data is statistically displayed on a personal computer after measurement.
【００３０】次に、本発明の第２実施例について説明す
る。Next, a second embodiment of the present invention will be described.
【００３１】図３は本発明の第２実施例を示す車両通行
計測装置による車両通行計測システムの模式図であり、
図３（ａ）は車両通行計測システムにおけるセンサの配
置図、図３（ｂ）はそのセンサの出力波形図である。FIG. 3 is a schematic diagram of a vehicle traffic measuring system using a vehicle traffic measuring device according to a second embodiment of the present invention.
FIG. 3A is a layout diagram of sensors in the vehicle traffic measurement system, and FIG. 3B is an output waveform diagram of the sensors.
【００３２】ここでは、試作したＭＩセンサ内蔵の２０
ｃｍ径の小型アルミの道路面設置鋲（センサ鋲）２個を
道路面の通行方向に５ｍ間隔で設置し、センサの信号線
は道路面２ｃｍ幅、２．５ｃｍ深さの溝に設置して道路
端で車両通行のセンシングを行った結果である。Here, a prototype of a built-in MI sensor 20
Two small-diameter aluminum road surface installation studs (sensor studs) are installed at 5 m intervals in the direction of traffic on the road surface, and the sensor signal lines are installed in grooves 2 cm wide and 2.5 cm deep on the road surface. This is the result of sensing vehicle traffic at the roadside.
【００３３】１台の車両が２個の道路面設置鋲を通過し
た場合の２個のセンサ出力の立ち上がり時間差をＴ秒と
おくと、車両の速度Ｖは、Ｖ＝５／Ｔ（ｍ／ｓ）であ
る。また、車両の車体長Ｌは、２個のセンサ出力の持続
時間をそれぞれｔ1 、ｔ2 とすると、Ｌ＝Ｖ・（ｔ1 ＋
ｔ2 ）／２で計測される。Assuming that the rising time difference between two sensor outputs when one vehicle passes through two road surface setting studs is T seconds, the speed V of the vehicle is V = 5 / T (m / s). ). Further, assuming that the durations of the two sensor outputs are t 1 and t 2 , respectively, L = V · (t 1 +
t 2 ) / 2.
【００３４】図４は本発明の第２実施例を示す車両通行
計測装置による通過車両の種類、速度、車両長の計測例
を示す図であり、横軸はカタログ値Ｌ（ｍ）、縦軸は推
定値Ｌ′（ｍ）である。FIG. 4 is a diagram showing an example of measuring the type, speed, and length of a passing vehicle by a vehicle traffic measuring device according to a second embodiment of the present invention, wherein the horizontal axis is a catalog value L (m) and the vertical axis is Is the estimated value L '(m).
【００３５】ここで得られた１５０台の車両（普通乗用
車、軽自動車、トラック、バイク）の計測結果では、車
体長は長めに推定されている。これは、センサヘッドの
方向を車体長さ方向に設定したため、車体残留磁気の車
外の磁力線も検出したためと考えられる。In the measurement results of 150 vehicles (ordinary passenger cars, mini cars, trucks, motorcycles) obtained here, the vehicle body length is estimated to be longer. This is presumably because the direction of the sensor head was set to the vehicle body length direction, and thus the outside magnetic field lines of the vehicle body residual magnetism were also detected.
【００３６】次に、本発明の第３実施例について説明す
る。Next, a third embodiment of the present invention will be described.
【００３７】図５は本発明の第３実施例を示す車両通行
計測装置による車速、車体長の検出例を示す図であり、
図５（ａ）は車両がセダン（車長推定４．５ｍ）、図５
（ｂ）は車両はバイク（車長推定２ｍ）、図５（ｃ）は
車両が軽自動車（車長推定３ｍ）のそれぞれ場合、２個
のＭＩセンサの道路面設置鋲（センサ鋲）による車両通
行検出例を示す図、図５（ｄ）は車両がセダン（車長推
定５ｍ）の上記ＭＩセンサによる検出によるコンパレー
タ出力時間差を示す図である。FIG. 5 is a diagram showing an example of detection of a vehicle speed and a vehicle length by a vehicle traffic measuring device according to a third embodiment of the present invention.
FIG. 5A shows a case where the vehicle is a sedan (4.5 m in vehicle length estimation), and FIG.
(B) is a motorbike (vehicle length estimated 2 m), and FIG. 5 (c) is a light vehicle (vehicle length estimated 3 m) when the vehicle is a light vehicle (vehicle length estimated 3 m). FIG. 5D is a diagram illustrating an example of detection of traffic, and FIG. 5D is a diagram illustrating a comparator output time difference due to detection of the sedan (vehicle length estimated 5 m) by the MI sensor.
【００３８】ここでは、幅１６ｃｍ、長さ４０ｃｍの長
径の１個の道路鋲（車両通行計測装置）にヘッド間隔が
３０ｃｍになるよう磁界検出感度を同一にした２個のＭ
Ｉセンサを設置して、車速、車体長を検出した結果であ
る。Here, two road tacks (vehicle traffic measuring device) having a long diameter of 16 cm and a length of 40 cm have two magnetic fields having the same magnetic field detection sensitivity so that the head interval is 30 cm.
This is a result of detecting a vehicle speed and a vehicle length by installing an I sensor.
【００３９】車速が３０〜４０ｋｍ／ｈ（８〜１０ｍ／
ｓ）の時は、センサ出力立ち上がり時間差は３０〜４０
ｍｓであるので、マイクロコンピュータのクロックによ
って車速、車体長の計測は容易である。The vehicle speed is 30 to 40 km / h (8 to 10 m / h).
In the case of s), the sensor output rise time difference is 30 to 40.
ms, it is easy to measure the vehicle speed and the vehicle body length by the clock of the microcomputer.
【００４０】図６は本発明の第４実施例を示す車両通行
計測装置の構造を示す図であり、図６（ａ）はその断面
図、図６（ｂ）はその底面図である。なお、図１と同様
の部分には同じ符号を付してそれらの説明は省略する。FIG. 6 is a view showing the structure of a vehicle traffic measuring device according to a fourth embodiment of the present invention. FIG. 6 (a) is a sectional view thereof, and FIG. 6 (b) is a bottom view thereof. The same parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.
【００４１】この実施例では、図６に示すように、道路
面設置鋲１には発信装置８を設け、その道路面設置鋲１
に非金属窓９を形成し、その道路面設置鋲１の記憶装置
６の情報は、非金属窓９を通して無線によって道路面設
置鋲１の外部に情報を発信するようにすることができ
る。当然その発信情報は受信装置（図示なし）で受信す
ることにより、車両通行計測を行うことができる。In this embodiment, as shown in FIG. 6, a transmitting device 8 is provided on the road surface installation stud 1 and the road surface installation stud 1 is provided.
A non-metallic window 9 is formed on the road surface, and the information in the storage device 6 of the road surface installation stud 1 can be transmitted to the outside of the road surface installation stud 1 wirelessly through the non-metallic window 9. Obviously, by receiving the transmission information by a receiving device (not shown), it is possible to perform vehicle traffic measurement.
【００４２】なお、本発明は上記実施例に限定されるも
のではなく、本発明の趣旨に基づいて種々の変形が可能
であり、これらを本発明の範囲から排除するものではな
い。It should be noted that the present invention is not limited to the above-described embodiment, but various modifications are possible based on the spirit of the present invention, and these are not excluded from the scope of the present invention.
【００４３】[0043]
【発明の効果】以上、詳細に説明したように、本発明に
よれば、簡便で設置も容易な車両通行計測装置を提供す
ることができる。As described above in detail, according to the present invention, a vehicle traffic measuring device which is simple and easy to install can be provided.
【図１】本発明の第１実施例を示す車両通行計測装置の
構造を示す図である。FIG. 1 is a diagram showing a structure of a vehicle traffic measurement device according to a first embodiment of the present invention.
【図２】本発明の第１実施例のＭＩセンサの出力波形お
よびその出力波形を絶対値回路・コンパレータ回路でパ
ルス列に変換した波形の検出例を示す図である。FIG. 2 is a diagram illustrating an output waveform of the MI sensor according to the first embodiment of the present invention and a detection example of a waveform obtained by converting the output waveform into a pulse train by an absolute value circuit / comparator circuit.
【図３】本発明の第２実施例を示す車両通行計測装置に
よる車両通行計測システムの模式図である。FIG. 3 is a schematic diagram of a vehicle traffic measurement system using a vehicle traffic measurement device according to a second embodiment of the present invention.
【図４】本発明の第２実施例を示す車両通行計測装置に
よる通過車両の種類、速度、車両長の計測例を示す図で
ある。FIG. 4 is a diagram showing an example of measuring the type, speed, and vehicle length of a passing vehicle by a vehicle traffic measurement device according to a second embodiment of the present invention.
【図５】本発明の第３実施例を示す車両通行計測装置に
よる車速、車体長の検出例を示す図である。FIG. 5 is a diagram illustrating an example of detection of a vehicle speed and a vehicle body length by a vehicle traffic measurement device according to a third embodiment of the present invention.
【図６】本発明の第４実施例を示す車両通行計測装置の
構造を示す図である。FIG. 6 is a view showing the structure of a vehicle traffic measuring device according to a fourth embodiment of the present invention.
【図７】本発明に適用される磁気インピーダンス効果形
磁界センサの一例を示す図である。FIG. 7 is a diagram showing an example of a magneto-impedance effect type magnetic field sensor applied to the present invention.
１ 道路面設置鋲 ２ 円盤型アルミニウム部材 ３ 空間 ４ アルミニウム板 ５ ＣＭＯＳ・ＩＣマルチバイブレータ形ＭＩセンサ
（磁界センサ） ６ 信号処理装置・半導体ＩＣメモリ（記憶装置） ７ 電源 ８ 発信装置 ９ 非金属窓DESCRIPTION OF SYMBOLS 1 Road surface setting stud 2 Disc-shaped aluminum member 3 Space 4 Aluminum plate 5 CMOS / IC multivibrator type MI sensor (magnetic field sensor) 6 Signal processing device / semiconductor IC memory (storage device) 7 Power supply 8 Transmission device 9 Non-metallic window
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 2F034 AA15 AC10 EA02 EA04 EA05 EA09 EA21 2F063 AA12 AA37 AA50 BA11 BB02 BD15 CA40 DA01 DA06 DA17 DD03 EB21 GA52 GA56 KA02 LA02 LA19 LA29 NA01 NA08 PA10 2F069 AA34 AA99 BB21 DD25 DD26 GG04 GG06 GG12 GG31 GG63 KK10 NN01 NN08 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2F034 AA15 AC10 EA02 EA04 EA05 EA09 EA21 2F063 AA12 AA37 AA50 BA11 BB02 BD15 CA40 DA01 DA06 DA17 DD03 EB21 GA52 GA56 KA02 LA02 LA19 LA29 NA01 NA08 PA10 2F069 BB04 DD GG12 GG31 GG63 KK10 NN01 NN08
Claims (9)
と信号処理装置と記録装置と電源とそれらを内蔵する非
磁性材料の道路面設置鋲とを具備することを特徴とする
車両通行計測装置。1. A vehicle traffic measuring device comprising: a magnetic field sensor, a signal processing device, a recording device, a power source, and a non-magnetic material road surface mounting stud containing the magnetic field sensor, the signal processing device, the recording device, and the power supply.
て、前記磁界センサは磁気インピーダンス効果による磁
界センサであることを特徴とする車両通行計測装置。2. The vehicle traffic measuring device according to claim 1, wherein the magnetic field sensor is a magnetic field sensor based on a magnetic impedance effect.
て、前記道路面設置鋲は直径が略３００ｍｍ以下、高さ
が略２２ｍｍ以下であることを特徴とする車両通行計測
装置。3. The vehicle traffic measurement device according to claim 1, wherein the road surface installation studs have a diameter of approximately 300 mm or less and a height of approximately 22 mm or less.
て、前記磁界センサは道路に沿って２個配置され、該磁
界センサの検出信号の信号処理によって車両の通過方
向、通過速度、車両の車体長、通過加速度を計測するこ
とを特徴とする車両通行計測装置。4. The vehicle traffic measurement device according to claim 1, wherein the two magnetic field sensors are arranged along a road, and the direction of the vehicle, the speed of the vehicle, and the body of the vehicle are processed by a signal processing of a detection signal of the magnetic field sensor. A vehicle traffic measuring device, which measures length and passing acceleration.
て、前記磁界センサの出力電圧を交流結合回路と、絶対
値回路と、比較回路とを通してパルス電圧列に変換し、
パルス間隔が０．４秒以内のパルス群は１台の車両の磁
気信号であると判定することを特徴とする車両通行計測
装置。5. The vehicle traffic measurement device according to claim 1, wherein an output voltage of the magnetic field sensor is converted into a pulse voltage train through an AC coupling circuit, an absolute value circuit, and a comparison circuit,
A vehicle traffic measurement device characterized in that a pulse group having a pulse interval of 0.4 seconds or less is determined to be a magnetic signal of one vehicle.
て、前記電源は電池と薄型蓄電器の組み合わせを用いる
ことを特徴とする車両通行計測装置。6. The vehicle traffic measuring device according to claim 1, wherein the power source uses a combination of a battery and a thin battery.
て、前記電池は乾電池又は太陽電池であることを特徴と
する車両通行計測装置。7. The vehicle traffic measuring device according to claim 6, wherein the battery is a dry battery or a solar battery.
て、前記信号処理装置はマイクロコンピュータを有し、
前記記録装置は半導体メモリからなることを特徴とする
車両通行計測装置。8. The vehicle traffic measurement device according to claim 1, wherein the signal processing device has a microcomputer,
The vehicle traffic measuring device is characterized in that the recording device comprises a semiconductor memory.
て、前記道路面設置鋲には発信装置及び非金属窓を備
え、前記記録装置の情報を、前記道路面設置鋲の非金属
窓を通して無線によって前記道路面設置鋲外部に発信す
ることを特徴とする車両通行計測装置。9. The vehicle traffic measuring device according to claim 1, wherein the road surface installation stud includes a transmitting device and a non-metal window, and information of the recording device is wirelessly transmitted through the non-metal window of the road surface installation stud. A vehicle traffic measurement device for transmitting a signal to the outside of the road surface setting stud by means of:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35735899A JP2001174473A (en) | 1999-12-16 | 1999-12-16 | Motor vehicle traffic measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35735899A JP2001174473A (en) | 1999-12-16 | 1999-12-16 | Motor vehicle traffic measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001174473A true JP2001174473A (en) | 2001-06-29 |
Family
ID=18453731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP35735899A Pending JP2001174473A (en) | 1999-12-16 | 1999-12-16 | Motor vehicle traffic measuring device |
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| Country | Link |
|---|---|
| JP (1) | JP2001174473A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009053056A (en) * | 2007-08-27 | 2009-03-12 | Univ Nagoya | Magnetic moving body speed detector |
| CN105241409A (en) * | 2015-09-25 | 2016-01-13 | 上海新纪元机器人有限公司 | Apparatus and method for measuring Z-axis vibration displacement |
| JP2018128290A (en) * | 2017-02-07 | 2018-08-16 | オムロン株式会社 | Traffic condition monitoring device, vehicle monitoring system, traffic condition monitoring method, and traffic condition monitoring program |
| JP2018128289A (en) * | 2017-02-07 | 2018-08-16 | オムロン株式会社 | Traffic condition monitoring device, vehicle monitoring system, traffic condition monitoring method, and traffic condition monitoring program |
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| JPH05128331A (en) * | 1991-10-31 | 1993-05-25 | Toshiba Corp | Measuring instrument |
| JPH05282591A (en) * | 1992-04-03 | 1993-10-29 | N T T Data Tsushin Kk | Device for detecting travelling vehicle |
| JPH07181239A (en) * | 1993-12-22 | 1995-07-21 | Res Dev Corp Of Japan | Magnetic impedance effect element |
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1999
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05128331A (en) * | 1991-10-31 | 1993-05-25 | Toshiba Corp | Measuring instrument |
| JPH05282591A (en) * | 1992-04-03 | 1993-10-29 | N T T Data Tsushin Kk | Device for detecting travelling vehicle |
| JPH07181239A (en) * | 1993-12-22 | 1995-07-21 | Res Dev Corp Of Japan | Magnetic impedance effect element |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009053056A (en) * | 2007-08-27 | 2009-03-12 | Univ Nagoya | Magnetic moving body speed detector |
| CN105241409A (en) * | 2015-09-25 | 2016-01-13 | 上海新纪元机器人有限公司 | Apparatus and method for measuring Z-axis vibration displacement |
| JP2018128290A (en) * | 2017-02-07 | 2018-08-16 | オムロン株式会社 | Traffic condition monitoring device, vehicle monitoring system, traffic condition monitoring method, and traffic condition monitoring program |
| JP2018128289A (en) * | 2017-02-07 | 2018-08-16 | オムロン株式会社 | Traffic condition monitoring device, vehicle monitoring system, traffic condition monitoring method, and traffic condition monitoring program |
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