JP2627961B2 - Traffic information collection device - Google Patents
Traffic information collection deviceInfo
- Publication number
- JP2627961B2 JP2627961B2 JP33670889A JP33670889A JP2627961B2 JP 2627961 B2 JP2627961 B2 JP 2627961B2 JP 33670889 A JP33670889 A JP 33670889A JP 33670889 A JP33670889 A JP 33670889A JP 2627961 B2 JP2627961 B2 JP 2627961B2
- Authority
- JP
- Japan
- Prior art keywords
- vehicle
- signal
- sensing
- pulse
- sensing signal
- 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
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- Traffic Control Systems (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、車両感知器を用いて交通量と占有時間を計
測する交通情報収集装置に関する。Description: TECHNICAL FIELD The present invention relates to a traffic information collection device that measures a traffic volume and an occupation time by using a vehicle sensor.
（従来の技術） 一般に、感知信号の処理は50ミリ秒以下の短い周期で
行われているため、接続回線数が多くなると処理の負荷
が非常に大きくなる。そこで処理負荷を軽減するため
に、１回線に実装される車両感知器の数が感知信号伝送
容量に比べて少ないことが多いことから、あらかじめ車
両感知器実装・未実装の設定をしておき、実装車両感知
器の各感知信号に対して感知パルスの時間的長さを処理
周期毎に計時するとともにその長さから感知信号が正常
か異常かを判定し、この判定結果と計測感知パルス長か
ら車両ありの占有時間と交通量を計測するものであっ
た。(Prior Art) Generally, processing of a sensing signal is performed in a short cycle of 50 milliseconds or less, so that the processing load becomes extremely large as the number of connection lines increases. Therefore, in order to reduce the processing load, the number of vehicle sensors mounted on one line is often smaller than the sensing signal transmission capacity. The time length of the sensing pulse for each sensing signal of the mounted vehicle sensor is measured for each processing cycle, and whether the sensing signal is normal or abnormal is determined from the length, and from this determination result and the measured sensing pulse length It measures the occupancy time and traffic volume with a vehicle.
（発明が解決しようとする課題） しかしながら、車両感知器を増設する際、そのたびに
車両感知器実装の設定を行わなければならないという煩
わしさの問題があった。(Problems to be Solved by the Invention) However, there is a problem of inconvenience in that when a vehicle sensor is added, the mounting of the vehicle sensor must be set each time.
本発明は、このような従来の欠点を除去するものであ
り、個々の回線毎に車両感知器実装の設定を行わなくと
も、自動的に占有時間と交通量を計測することができる
交通情報収集装置を提供することを目的とするものであ
る。The present invention eliminates such conventional drawbacks, and can collect traffic information that can automatically measure occupancy time and traffic volume without having to set the vehicle sensor mounting for each individual line. It is intended to provide a device.
（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、各回線から車両
感知器の感知信号を受信・抽出して、前記車両感知器の
感知領域における車両の有無を示すパルス信号に変換す
る感知信号サンプリング手段と、この感知信号サンプリ
ング手段のパルス信号が車両ありの状態になったことを
検出したときに前記車両感知器が実装されていると判定
する車両感知器実装判定手段と、実装と判定された車両
感知器の感知信号に対応する前記感知信号サンプリング
手段のパルス信号の長さを計測し、車両ありおよび車両
なしの時間的長さを検出する感知パルス長計測手段と、
この感知パルス長計測手段が計測した前記パルス信号の
長さをもとに感知信号が正常か異常かを判定する感知信
号パルス検定手段と、この感知信号パルス検定手段の判
定結果と前記パルス信号の長さから車両ありの占有時間
を計測する占有時間計測手段と、前記判定結果をもとに
交通量を計測する交通量計測手段とを備えたことを特徴
とするものである。(Means for Solving the Problems) In order to achieve the above object, the present invention receives and extracts a sensing signal of a vehicle sensor from each line and outputs a pulse indicating the presence or absence of a vehicle in a sensing area of the vehicle sensor. Sensing signal sampling means for converting the signal into a signal; and vehicle sensor mounting determining means for determining that the vehicle sensor is mounted when detecting that the pulse signal of the sensing signal sampling means has a vehicle. And sensing pulse length measuring means for measuring the length of the pulse signal of the sensing signal sampling means corresponding to the sensing signal of the vehicle sensor determined to be mounted, and detecting the time length with and without the vehicle. ,
A sensing signal pulse verifying means for determining whether the sensing signal is normal or abnormal based on the length of the pulse signal measured by the sensing pulse length measuring means; a determination result of the sensing signal pulse verifying means; An occupancy time measuring means for measuring an occupancy time with a vehicle from a length, and a traffic volume measuring means for measuring a traffic volume based on the determination result.
（作用） 従って、本発明によれば、車両感知器が増設されるた
びに車両感知器実装の設定をしなくても、増設車両感知
器の占有時間と交通量を計測することができる。(Operation) Therefore, according to the present invention, it is possible to measure the occupation time and the traffic volume of the additional vehicle sensor without setting the mounting of the vehicle sensor every time the vehicle sensor is added.
（実施例） 第１図は、本発明の一実施例による交通情報収集装置
の交通量と占有時間の計測のブロックを示すものであ
る。第１図において、１は車両の通過中に車両ありの感
知信号を送出する車両感知器であって、道路側に逆Ｌ字
状の鉄柱の先端に取り付けられた超音波式車両感知器ま
たは道路に埋設して車両通過時のインピーダンス変化量
を検出するループ式車両感知器である。２は回線を通じ
て車両感知器から送られてくる感知信号を数十ミリ秒周
期で受信・抽出し、車両の有無を示すパルス信号である
抽出感知信号を出力する感知信号サンプリング手段、３
は抽出感知信号が車両なしから車両ありに変化したと
き、車両感知器の実装信号を出力する車両感知器実装判
定手段、４は実装信号と抽出感知信号から車両ありおよ
び車両なしの感知パルス長を感知信号サンプリング手段
２と同じ周期で計時する感知パルス長計測手段、５は車
両感知器の感知領域の境界付近に車両が停止したときな
どに発生する異常に短いノイズパルスの感知信号を検出
するためのもので、感知信号サンプリング手段２と同じ
周期で計測感知パルス長とあらかじめ設定した検定値と
を比較して感知信号が正常かどうかの判定を行い、正常
感知信号を出力する感知パルス検定手段であって、計測
感知パルス長が検定値以上のとき、正常と判定して抽出
感知信号にあわせ車両ありであれば車両あり、車両なし
であれば車両なしの正常感知信号を出力する。また、計
測感知パルス長が検定値未満の状態のときは判定不可能
として正常信号を出力しない。なお、前回の感知信号の
計測感知パルス長が検定値未満であったとき、前回の感
知信号を異常と判定して今回の感知信号が変化するまで
前回と同じ車両ありまたは車両なしの正常感知信号を再
度出力する。６は新たに車両ありの正常感知信号が出力
されたとき、そのときの計測感知パルス長を占有時間に
加算し、以降その正常感知信号が出力されている間感知
信号サンプリング手段２と同じ周期で占有時間に１を加
算して車両ありの占有時間を計測する占有時間計測手
段、７は新たに車両なしの正常感知信号が出力されたと
き、前回の正常感知信号が車両ありであれば交通量を１
台加算する交通量計測手段である。(Embodiment) FIG. 1 shows a block for measuring the traffic volume and occupancy time of a traffic information collecting apparatus according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a vehicle sensor for transmitting a detection signal indicating that a vehicle is present while the vehicle is passing, and an ultrasonic vehicle sensor or a road mounted on the tip of an inverted L-shaped iron pole on the road side. This is a loop-type vehicle sensor that is embedded in a vehicle and detects the amount of impedance change when the vehicle passes. Reference numeral 2 denotes a sensing signal sampling means for receiving and extracting a sensing signal sent from a vehicle sensor through a line at a period of several tens of milliseconds, and outputting an extracted sensing signal as a pulse signal indicating the presence or absence of a vehicle;
Is a vehicle sensor mounting determining means for outputting a mounting signal of the vehicle sensor when the extracted sensing signal changes from the absence of the vehicle to the presence of the vehicle, and 4 detects the detection pulse length of the vehicle with and without the vehicle from the mounting signal and the extracted sensing signal. The sensing pulse length measuring means 5, which measures time in the same cycle as the sensing signal sampling means 2, detects the abnormally short noise pulse sensing signal generated when the vehicle stops near the boundary of the sensing area of the vehicle sensor. In the same period as the sensing signal sampling means 2, the sensing pulse length is compared with a predetermined test value to determine whether the sensing signal is normal, and a sensing pulse testing means for outputting a normal sensing signal. Therefore, when the measured sensing pulse length is longer than the verification value, it is determined to be normal and there is a vehicle if there is a vehicle according to the extracted sensing signal, and if there is no vehicle, there is no vehicle. And outputs a normal detection signal. Further, when the measurement sensing pulse length is less than the test value, it is determined that determination is impossible and a normal signal is not output. When the measured sensing pulse length of the previous sensing signal is less than the test value, the previous sensing signal is determined to be abnormal, and the same vehicle presence or absence normal vehicle sensing signal as before until the current sensing signal changes. Is output again. 6, when a new normal detection signal indicating the presence of a vehicle is output, the measured detection pulse length at that time is added to the occupation time, and thereafter, while the normal detection signal is being output, at the same cycle as the detection signal sampling means 2 An occupancy time measuring means 7 for adding 1 to the occupancy time to measure the occupancy time with the vehicle. When a new normal detection signal without the vehicle is output, the traffic volume is calculated if the previous normal detection signal is present. 1
It is a traffic volume measuring means for adding vehicles.
次に上記実施例の動作例について説明する。 Next, an operation example of the above embodiment will be described.
Ｍ個の車両感知器１からそれぞれ第２図に示すような
感知信号が送られてくる場合を例に説明する。An example in which a sensing signal as shown in FIG. 2 is sent from each of the M vehicle sensors 1 will be described.
まず最初に、すべての回線の感知信号伝送容量分の車
両感知器すべてに対して、実装信号をオフ、交通量と占
有時間の計測値を０にする。次に感知信号サンプリング
手段２で感知信号をＴミリ秒周期で受信・抽出し、第２
図のt0からt19までのようにＴミリ秒毎に抽出感知信号
を出力する。車両感知器実装判定手段３では、この抽出
感知信号を入力して最初に車両ありの信号を検出したと
き、車両感知器ではt1、車両感知器ではt5、車両感
知器ではt2の時点からそれぞれ実装信号をオンにす
る。感知パルス長計測手段４では実装信号がオンになっ
ている車両感知器に対して抽出感知信号が変化したとき
から次に変化するまでの間、車両感知器ではt1から
t3、t3からt6、t6からt9、t9からt13、t13からt15、t15
からt16、t16からt17、t17からt19までの間、車両感知
器ではt5からt8、t8からt10、t10からt12、t12からt
19までの間、車両感知器ではt2からt5、t5からt8、t8
からt11、t11からt19までの間、それぞれＴミリ秒周期
で１からカウントアップして感知パルス長を計時する。
感知パルス検定手段５では、感知信号の検定値を4Tミリ
秒とすると、計測感知パルス長さが4Tミリ秒以上のと
き、車両感知器ではt2からt3、t5からt6、t8からt9、
t11からt13、t14からt15、t18からt19までの間、車両感
知器ではt7からt8、t9からt10までの間、車両感知器
ではt4からt5、t7からt8、t9からt11、t13からt19ま
での間、抽出感知信号が車両ありであれば車両あり、車
両なしであれば車両なしの正常感知信号を出力する。ま
た、計測感知パルス長が4Tミリ秒未満の異常感知信号が
あった直後から今回の抽出感知器信号が変化するまで、
車両感知器ではt16からt17まで、車両感知器ではt
12からt19まで、それぞれ車両あり、車両なしの正常感
知信号を出力する。占有時間計測手段６では、車両あり
の正常感知信号が出力されたとき、車両感知器では
t2，t8，t14，t16の時点、車両感知器ではt7の時点、
車両感知器ではt4，t9の時点で、それぞれそのときの
計測感知パルス長を占有時間に加算し、以降その正常感
知信号が出力されている間Ｔミリ秒周期で占有時間に１
に加算する。交通量計測手段７では、車両なしの正常感
知信号が出力されたとき、前回の正常感知信号が車両あ
りであれば、車両感知器ではt5，t11，t18の時点、車
両感知器ではt9の時点、車両感知器ではt7，t13の
時点で、それぞれ交通量を１台加算する。First, the mounting signals are turned off and the measured values of the traffic volume and the occupation time are set to 0 for all the vehicle sensors corresponding to the sensing signal transmission capacity of all the lines. Next, the sensing signal is received and extracted by the sensing signal sampling means 2 at a period of T milliseconds,
And it outputs the extracted sensing signal every T msec as from t 0 in FIG until t 19. The vehicle sensor mounting determination means 3 inputs the extracted detection signal and detects the presence of the vehicle for the first time. When the vehicle detector detects the presence of the vehicle for the first time, t 1 for the vehicle sensor, t 5 for the vehicle sensor, and t 2 for the vehicle sensor To turn on the mounting signal. Between when the embedded signal sensing pulse length measuring means 4 extracts the sensing signal to the vehicle detectors that are turned on is changed until the next change, from t 1 in vehicle detectors
t 3, t 3 from t 6, t 6 from t 9, t 9 from t 13, t 13 from t 15, t 15
T from between from t 16, t 16 from t 17, t 17 to t 19, from t 10, t 10 from t 12, t 12 from t 8, t 8 from t 5 in vehicle detectors
Until 19, t 8 from t 5, t 5 from t 2 in vehicle detectors, t 8
From t to t 11 , and from t 11 to t 19 , the sensing pulse length is counted by counting up from 1 at a period of T milliseconds.
In sensing the pulse test means 5, when the test value of the sensing signal and 4T milliseconds, when the measurement sensing pulse length of 4T or more milliseconds, t from t 2 in vehicle detectors 3, t t 6 from 5, t 8 From t 9 ,
During the period from t 11 from t 13, t 14 to t 19 from t 15, t 18, from t 8, t 9 from t 7 in the vehicle detector to t 10, t 5 from t 4 in vehicle detectors, between t 7 from t 8, t 9 to t 19 from t 11, t 13, if there extraction sensing signal the vehicle has a vehicle, and outputs a normal detection signal without the vehicle if no vehicle. Also, from immediately after there is an abnormality detection signal with a measurement detection pulse length of less than 4T milliseconds, until this extraction sensor signal changes,
From t 16 in the vehicle detector to t 17, t is a vehicle detector
12 to t 19, there vehicle, and outputs a normal detection signal without the vehicle. When the occupancy time measuring means 6 outputs a normal detection signal indicating that the vehicle is present, the vehicle detector
at times t 2 , t 8 , t 14 , t 16 , at the vehicle sensor at time t 7 ,
At the time of t 4, t 9 in vehicle detectors, respectively adds the measurement sensing pulse length when the occupancy time, the time taken between T msec period its normal sense signal later is outputted 1
Is added to. In traffic volume measuring means 7, when the normal sense signal without the vehicle is output, if there vehicle normally sensed signal of the previous time point of t 5, t 11, t 18 in the vehicle detector, a vehicle detector time of t 9, the vehicle detectors at time t 7, t 13, adds one traffic volume respectively.
（発明の効果） 本発明は、上記実施例より明らかなように、車両感知
器から車両ありを示す感知信号が出力されたか否かによ
って車両感知器実装を判定するので、車両感知器の増設
の際そのつど車両感知器実装の設定をしなくとも、占有
時間と交通量を計測することが可能になるという効果を
有する。(Effects of the Invention) As is clear from the above embodiment, the present invention determines whether or not a vehicle sensor is mounted, based on whether or not a detection signal indicating that a vehicle is present is output from the vehicle sensor. In this case, it is possible to measure the occupation time and the traffic volume without setting the vehicle sensor every time.
第１図は本発明の一実施例による交通情報収集のブロッ
ク図、第２図は本実施例の交通量と占有時間の計測図で
ある。 １…車両感知器、２…感知信号サンプリング手段、３…
車両感知器実装判定手段、４…感知パルス長計測手段、
５…感知パルス検定手段、６…占有時間計測手段、７…
交通量計測手段。FIG. 1 is a block diagram of traffic information collection according to one embodiment of the present invention, and FIG. 2 is a measurement diagram of traffic volume and occupancy time in this embodiment. DESCRIPTION OF SYMBOLS 1 ... Vehicle detector, 2 ... Sense signal sampling means, 3 ...
Vehicle sensor mounting determination means, 4 ... Detection pulse length measurement means,
5 ... Sense pulse verification means, 6 ... Occupation time measurement means, 7 ...
Traffic volume measurement means.
Claims (1)
抽出して、前記車両感知器の感知領域における車両の有
無を示すパルス信号に変換する感知信号サンプリング手
段と、この感知信号サンプリング手段のパルス信号が車
両ありの状態になったことを検出したときに前記車両感
知器が実装されていると判定する車両感知器実装判定手
段と、実装と判定された車両感知器の感知信号に対応す
る前記感知信号サンプリング手段のパルス信号の長さを
計測し、車両ありおよび車両なしの時間的長さを検出す
る感知パルス長計測手段と、この感知パルス長計測手段
が計測した前記パルス信号の長さをもとに感知信号が正
常か異常かを判定する感知信号パルス検定手段と、この
感知信号パルス検定手段の判定結果と前記パルス信号の
長さから車両ありの占有時間を計測する占有時間計測手
段と、前記判定結果をもとに交通量を計測する交通量計
測手段とを備えたことを特徴とする交通情報収集装置。1. A vehicle detection signal is received from each line.
A sensing signal sampling means for extracting and converting the signal into a pulse signal indicating the presence or absence of a vehicle in the sensing area of the vehicle sensor, and detecting that the pulse signal of the sensing signal sampling means is in a vehicle presence state. The vehicle sensor mounting determining means for determining that the vehicle sensor is mounted, and measuring the length of the pulse signal of the sensing signal sampling means corresponding to the sensing signal of the vehicle sensor determined to be mounted, the vehicle Sensing pulse length measuring means for detecting the temporal length of presence and absence of a vehicle, and a sensing signal for determining whether the sensing signal is normal or abnormal based on the length of the pulse signal measured by the sensing pulse length measuring means Pulse verification means; occupancy time measurement means for measuring the occupancy time with the vehicle from the determination result of the sensing signal pulse verification means and the length of the pulse signal; Traffic information collecting device being characterized in that a traffic volume measuring means for measuring the traffic volume on the basis of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33670889A JP2627961B2 (en) | 1989-12-27 | 1989-12-27 | Traffic information collection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33670889A JP2627961B2 (en) | 1989-12-27 | 1989-12-27 | Traffic information collection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03198199A JPH03198199A (en) | 1991-08-29 |
| JP2627961B2 true JP2627961B2 (en) | 1997-07-09 |
Family
ID=18301972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33670889A Expired - Fee Related JP2627961B2 (en) | 1989-12-27 | 1989-12-27 | Traffic information collection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2627961B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5219547B2 (en) * | 2008-02-21 | 2013-06-26 | アルパイン株式会社 | Car navigation system and navigation method |
| JP2017016433A (en) * | 2015-07-01 | 2017-01-19 | 住友電工システムソリューション株式会社 | Signal control system, central device, traffic terminal device, and computer program |
-
1989
- 1989-12-27 JP JP33670889A patent/JP2627961B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03198199A (en) | 1991-08-29 |
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