JP2000113373A - Vehicle detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle detector which can comparatively inexpensively be realized and which can precisely detect the passage of a vehicle. SOLUTION: A vehicle detector 11 is provided with a columnar main body arranged on the side part of a vehicle passage, plural sensors 13 which are arranged in plural rows on the face of the vehicle passage side of the columnar main body in a vertical direction and detect the entering of the vehicle and a processing means receiving a detection result obtained by the sensor 13 and executing an operation. Thus, precise vehicle detection can be executed without causing chattering. When the plural sensors 13 are arranged in two columns in the vertical direction and the sensors in one column and the sensors in the other column are arranged alternately in the vertical direction, the multiple sensors are not required and the manufacture cost of the vehicle detector can be suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle detector, and more particularly to a vehicle detector having a simple structure and capable of accurately detecting the passage of a vehicle.

[0002]

2. Description of the Related Art For example, at an interchange which is an entrance of a parking lot or an entrance of an expressway, there is a place where a vehicle detector is installed in order to measure a daily vehicle traffic volume and obtain other road information. is there. FIG. 5 shows a conventional example of such a vehicle detector.
The vehicle detector 1 includes a detector main body 2 having a column structure, and a plurality of sensors 3 arranged at a substantially central portion of the column main body 2 in a straight line in the vertical direction. Generally, the vehicle detectors 1 are used as a pair as shown in FIG. 6, one of the vehicle detectors 1 is provided with a transmitting unit (light emitting unit) as a sensor, and the other vehicle detector 1 has a sensor. As a receiving means (light receiving means). In the vehicle detector 1, a transmitting-side vehicle detector (referred to as 1a) and a receiving-side vehicle detector (referred to as 1b) are disposed to face each other across the path of the vehicle 4, and the transmitting-side vehicle detector 1a is provided. , A radio wave or light (referred to as radio wave 5) is emitted toward the receiving-side vehicle detector 1b, and this is received by the receiving means. When the vehicle 4 passes through the passage, the electric wave 5 is cut off, and the vehicle detector 1
Is detected. The vehicle detector 1 is electrically connected to a signal processing circuit for processing the detection signal, and the signal processing circuit processes the detection signal to determine the passage of the vehicle and the type and characteristics of the vehicle that has passed.

[0003]

However, in such a conventional vehicle detector, since a plurality of sensors 3 are arranged in a substantially straight line in a substantially central portion of the column main body, the vehicle 3 is not provided. When the vehicle passes between the pair of vehicle detectors 1, it cannot be determined in which direction the vehicle has passed. In the conventional vehicle detector 1, the sensor 3
Are arranged in a row, as shown in FIG. 6, the vehicle 4 reaches a location where the vehicle 4 approaches or does not reach the radiating portion of the radio wave 5, and the passage is congested by the vehicle 4 to be measured. If the vehicle reverses in the traveling direction (arrow S in the figure) for some reason, there is a problem that the vehicle detector 1 repeats detection and non-detection and causes chattering. In order to solve such a problem, two pairs of the above-described vehicle detectors are prepared, and the two pairs of the vehicle detectors are arranged in a front-rear relationship with respect to each one of the vehicle passages. Had to take the method of performing correct vehicle detection. However, according to such a method, a new problem arises that two vehicle detectors are required in one place, which is expensive.

[0004] The present invention has been made in view of such conventional problems, and its object can be realized relatively inexpensively.
Another object of the present invention is to provide a vehicle detector capable of accurately detecting the passage of a vehicle.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a vehicle detector including a column-shaped main body disposed on a side of a vehicle passage, and a column-shaped main body arranged vertically on a surface of the vehicle passage-side. The gist comprises a plurality of sensors arranged in a plurality of rows in the direction to detect the entry of the vehicle, and processing means for receiving and calculating the detection results obtained by the sensors. As one form of this vehicle detector, the sensors are arranged in two rows in the vertical direction, and the sensors in one row and the sensors in the other row are arranged so as to be alternately arranged in the vertical direction. Can be. Further, when the two rows of sensor groups both detect the vehicle, the processing means performs the detection of the vehicle and the direction of travel in advance of the detection timing, while only one of the two rows of sensor groups detects the vehicle. When detection is performed, a non-detection operation can be performed.

Thus, a vehicle detector can be realized at relatively low cost, and it is possible to accurately detect the passage of a vehicle.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS According to a first aspect of the present invention, there is provided a vehicle detector, comprising: a column-shaped main body disposed on a side of a vehicle passage; A plurality of are arranged and arranged in a plurality of rows, a sensor for detecting the entry of the vehicle, and processing means for calculating based on the detection result obtained by the sensor,
This has the effect that the passage of the vehicle can be accurately detected.

According to a second aspect of the present invention, in the vehicle detector according to the first aspect, the sensors are arranged in two rows, and one of the pillar-shaped main bodies is provided on a surface on the vehicle passage side. The sensor in one row and the sensor in the other row are arranged so as to be alternately shifted in the vertical direction. This has the effect of accurately detecting the passage of a vehicle and realizing a vehicle detector at low cost. Have.

According to a third aspect of the present invention, in the vehicle detector according to the second aspect, when both of the two rows of sensor groups detect the vehicle, the processing means may determine whether the vehicle is ahead or behind the detection timing. While detecting the traveling direction of the vehicle, when only one of the two rows of sensor groups detects the vehicle, the non-detection operation is performed. Have.

According to a fourth aspect of the present invention, in the vehicle detector according to the second or third aspect, the sensors in one row and the sensors in the other row are arranged so as to be alternately shifted in the vertical direction. In addition, the vertical pitches of the sensors are all equal, and it has an effect that the passage of the vehicle can be accurately detected.

According to a fifth aspect of the present invention, in the vehicle detector according to the second or third aspect, the sensors in one row and the sensors in the other row are alternately arranged in the vertical direction. In addition, a plurality of types of vertical pitches of the sensor are set, and the operation of accurately detecting the passage of the vehicle can be improved.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a configuration of a vehicle detector according to one embodiment of the present invention. In this figure, reference numeral 11 denotes a vehicle detector according to the present invention, 12 denotes a detector main body 2 having a column structure, and 13 denotes a plurality of columns (two columns in this embodiment) on a surface of the column main body 12 on the vehicle passage side. , A plurality of sensors arranged alternately. The arrangement of the sensors 13 is a so-called staggered arrangement. FIG. 2A is a front view illustrating an arrangement configuration of sensors in the vehicle detector 11. As shown in FIG. 2A, the first row A1 and the second row A2
And the vertical pitch (P
) Are set at the same pitch, and the arrangement is alternately arranged in the first row A1 and the second row A2 with a shift of half a pitch in the vertical direction. Further, when it is necessary to increase the detection accuracy depending on the height of the sensor 13, the vertical pitch may be plural (for example, P1 to P3) as shown in FIG. 2B.

FIG. 3 is a block diagram showing a configuration of a signal processing circuit for processing a detection signal of the vehicle detector according to the present embodiment. In FIG. 3, reference numeral 15 denotes a transmitting-side vehicle detector (11a) among the vehicle detectors used in pairs.
The transmission unit 16 is provided on the receiving vehicle detector (11b).
) Is shown. Reference numeral 17 denotes a processing unit for calculating the characteristics of the vehicle by calculating the detection signal.
Is an interface for matching the connection with another communication device or the like in order to send the processing result in the processing unit 17 to a central processing unit such as a center. In the vehicle detector 11, when the vehicle 14 (going out) enters, the radio wave 15 is cut off, and the vehicle detector 11 detects the passage of the vehicle 14.
The vehicle detector 11 is electrically connected to a signal processing circuit for processing the detection signal, and the processing unit 17 processes the detection signal to determine the passage of the vehicle and the type and characteristics of the vehicle that has passed. It has become.

The operation of the vehicle detector having such a configuration will be described below. FIG. 4 is a plan view of a vehicle passage portion for explaining a vehicle detection operation in the present embodiment. Also in this embodiment, as shown in FIG. 4, the vehicle detectors 11 are used in pairs, and one vehicle detector 11 is provided with a transmitting unit (or a light emitting unit) as a sensor, and the other vehicle detector 11 is provided with a transmitting unit (or a light emitting unit). The detector 11 is provided with receiving means (or light receiving means) as a sensor. The vehicle detector 11 is arranged such that a vehicle detector 11a on the transmitting side and a vehicle detector 11b on the receiving side face each other with the passage of the vehicle 14 interposed therebetween. A radio wave 15 is emitted from the transmitting vehicle detector 1a to the receiving vehicle detector 1b to detect the vehicle 14, and the radio wave 15 is received by the receiving means. In this embodiment, as described above, the plurality of sensors 13 are arranged in two rows in a staggered arrangement, and as shown in FIG. 2A, the sensors 13 are arranged between the first row A1 and the second row A2. 13 are arranged at the same pitch in the vertical direction (P), and the arrangement is alternately shifted by a half pitch in the vertical direction between the first row A1 and the second row A2. It is arranged. Therefore, when the path portion for detecting the vehicle is viewed in a plan view as shown in FIG. When the vehicle 14 enters such a vehicle detection path (the direction of entry is indicated by an arrow S1 in FIG. 4), the radio wave 15
5a is cut off, and if the vehicle 14 proceeds as it is, then the radio wave 15b is cut off, and the vehicle detector 11 detects the passage of the vehicle 14. The signal processing circuit performs arithmetic processing on the detection signal obtained by the vehicle detector 11.

The content of this arithmetic processing is shown in, for example, FIG.
When the vehicle 14 has entered only a portion that blocks only the radio wave 15a as in the case of, the vehicle is not detected because it is regarded as chattering. On the other hand, as shown in FIG. 4B, when the vehicle 14 has sufficiently entered the site where the radio waves 15a and 15b are blocked, the vehicle 14 is detected as being at the detection position. In this case, when both of the two groups of sensors detect the vehicle, the signal processing circuit can detect the traveling direction of the vehicle earlier or later than the detection timing. Further, FIG.
When the vehicle 14 is located at a position where only the electric wave 15b is blocked, the vehicle is not detected because it is regarded as chattering.

By performing such vehicle detection,
The vehicle detector 11 can perform accurate vehicle detection without chattering.

[0017]

As described above, according to the present invention,
The vehicle detector has a pillar-shaped main body arranged on the side of the vehicle passage, and a plurality of sensors arranged in a plurality of rows in a vertical direction on a surface of the pillar-shaped body on the vehicle passage side, and detecting entry of the vehicle. And processing means for calculating based on the detection result obtained by the sensor, so that accurate vehicle detection can be performed without chattering. In addition, a plurality of sensors are arranged in two rows in the vertical direction, and the sensors in one row and
If the sensors in the other row are arranged so as to be alternately arranged in the vertical direction, various effects can be obtained such that the number of sensors is not required forcibly and the manufacturing cost of the vehicle detector can be suppressed. .

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a vehicle detector according to an embodiment of the present invention.

FIG. 2 (a) is a front view showing an arrangement in which the longitudinal pitches of sensors provided in the vehicle detector in the embodiment are set to the same pitch. (B) It is provided in the vehicle detector in the embodiment. Front view showing an arrangement configuration in which multiple types of vertical pitches of sensors are set

FIG. 3 is a block diagram illustrating a configuration of a signal processing circuit that processes a detection signal of the vehicle detector according to the embodiment.

FIG. 4 is a plan view of a vehicle passage portion for explaining a vehicle detection operation in the embodiment.

FIG. 5 is a perspective view showing an example of a conventional vehicle detector.

FIG. 6 is a plan view of a vehicle passage portion for explaining a conventional vehicle detection operation.

[Explanation of symbols]

 11 Vehicle detector 12 Detector body 13 Sensor 14 Vehicle 15 Radio wave

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Takao Ogawa 3-1-1 Tsunashima Higashi, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture F-term (reference) 2F069 AA99 BB21 DD27 GG06 GG07 GG58 GG62 NN01 5H180 AA01 BB04 CC01 CC12 DD02

Claims (5)

[Claims] 1. A column-shaped main body disposed on a side portion of a vehicle passage, and a plurality of columns are arranged in a plurality of rows in a vertical direction on a surface of the column-shaped main body on a side of the vehicle passage, so that a vehicle enters. A vehicle detection device comprising: a sensor for detecting a detection result; and processing means for receiving and calculating a detection result obtained by the sensor. 2. The sensor is disposed in two rows, and a sensor in one row is provided on a surface of the pillar-shaped main body on a vehicle passage side.
The vehicle detector according to claim 1, wherein the sensors in the other row are alternately arranged in the vertical direction. And a processing means for detecting the vehicle and detecting the direction of travel of the vehicle when the two groups of sensors detect the vehicle both before and after the detection timing.
3. The vehicle detector according to claim 2, wherein a non-detection operation is performed when only one of the two groups of sensors detects the vehicle. 4. The sensor according to claim 2, wherein the sensors in one row and the sensors in the other row are alternately arranged in the vertical direction, and the pitches of the sensors in the vertical direction are all equal. Or the vehicle detector according to 3. 5. The sensor according to claim 2, wherein the sensors in one row and the sensors in the other row are alternately arranged in the vertical direction, and a plurality of vertical pitches of the sensors are set. Or the vehicle detector according to 3.