JP2001155288A - Instrument for measuring traffic amount - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a traffic amount measuring instrument by which an inspection for collating visually recognized measurement with automatic measurement is easily executed. SOLUTION: An operation panel 40 for displaying the measured number of vehicles is freely attached/detached to/from an instrument main body. When a collating inspection is executed, the operation panel is detached from the main body and placed at a position for easy inspection. Then a operability is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traffic flow measuring device installed on the side of a road for automatically measuring the traffic flow, and more particularly to improving the workability when checking whether the measurement operation is normal. is there.

[0002]

2. Description of the Related Art Traffic volume is automatically measured using a loop coil buried in a road or an ultrasonic head installed on a road.

FIG. 8 shows a traffic flow measuring device 13 using loop coils 11 and 12. In the method using a loop coil, when a vehicle passes over the loop coils 11 and 12 buried in the road, the passing vehicle is detected by using the change in the inductance of the loop, and the traffic volume installed on the side of the road is detected. The measurement device 13 totalizes the detection results. By using two loop coils, the upper and lower lines can be measured independently by one device 13. The data measured by the traffic measuring device 13 is transmitted to the central device through a communication line.

Further, a loop coil and an ultrasonic head are installed at a measurement point, a floor height of a passing vehicle is detected by the loop coil, a vehicle height is detected by an ultrasonic wave, and a detection result of the loop coil and the ultrasonic head is obtained. A vehicle type classification type traffic volume measuring device has been developed which measures the vehicle length by combining the vehicle types, determines the vehicle type of the passing vehicle based on the vehicle length, and measures the number of passing vehicles for each vehicle type.

[0005] In these traffic flow measuring devices, in order to verify the accuracy of the measuring operation, a collation survey with manual observation is performed every three months to half a year. In this survey, the investigator opened the door of the traffic volume measurement device 13, and over a period of time, it was determined whether the increase in the number of counts displayed inside the device matched the actual passing situation of the vehicle visually observed. To check.

[0006]

However, in the conventional traffic volume measuring device, the work burden of reading the change in the number of counts displayed on the device while checking the passing status of the vehicle in the collation survey with the visual observation. There is a problem that is large. In this work, if the traveling vehicle can be seen by slightly moving the line of sight from the count number display section of the device, the collation is easy, but if the traveling vehicle can not be seen unless turning around or bending the neck greatly , A great burden is involved in the collation work.

[0007] When installing the traffic volume measuring device, setting the orientation of the traffic volume measuring device in consideration of the convenience of the collation survey is not easy due to restrictions on the installation location.

[0008] Even if the direction of installation of the traffic flow measuring device can be selected, if the vehicle is set in a direction that facilitates the collation investigation of the vehicle traveling in one lane, the vehicle traveling in the opposite lane can be collated. Investigation becomes difficult.

In addition, since the collation survey in rainy weather is performed by covering the traffic measuring device with a sheet so as not to wet the inside of the device, the workability is further deteriorated.

[0010] The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide a traffic flow measuring device having improved workability of collation investigation.

[0011]

Therefore, in the traffic volume measuring device of the present invention, an operation panel for displaying the measured number of vehicles is made detachable from the device main body.

[0012] Therefore, at the time of collation investigation, the operation panel can be detached from the apparatus main body and placed at a position where inspection can be easily performed, and the workability of collation investigation can be improved.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in the block diagram of FIG. 5, a traffic flow measuring device according to an embodiment of the present invention has an interface 21 for receiving a detection signal from a sensing portion 10 of a loop coil or an ultrasonic head, and an interface 21 for detecting the detection signal. A sensor processing unit 30 that detects and counts the passage of vehicles from the signal, an operation panel unit 40 that displays the counted number of vehicles, and a main process that counts the number of passing vehicles for each recording cycle, such as hourly and daily. Part 22
And a transmission unit 23 for transmitting the measurement result to the central device.

As shown in FIG. 6, the sensor processing unit 30 includes an ultrasonic sensing unit 31 for detecting a vehicle passing or a vehicle height from a detection signal of the ultrasonic head, and a vehicle passing or floor detecting signal for the loop coil. A loop sensor 38 for detecting the height, a CPU 32 for determining the type of the traveling vehicle based on the detection result, and counting the number of passing vehicles of each type; a ROM 33 in which an operation program of the CPU 32 is stored; A RAM 34 is used as a work area, a timer 35 measures time, and an interface 36 for the operation panel unit 40 is provided.

The operation panel section 40 is detachable from the apparatus main body 20, and is connected to the apparatus main body by a cable. The operation panel unit 40 includes, as shown in FIG.
And a power connector 42 for receiving power, an interface 43 for the sensor processing unit 30, a dynamic display unit 47 for displaying a count and the like sent from the sensor processing unit 30, and an operation of each unit. An LED 48 that is lit at the time to display an operation state and various switches are provided. The switches are used to designate a display switch 44 for turning on / off a dynamic display unit 47 and a lane to be displayed. A designation switch 45, a selection switch 46 for switching between count display and time display, a switch for correcting time and count, and the like are provided.

The operation panel unit 40 operates with a power supply of 5 V, and operates on a distributed network LON (Local Operating Network).
ork), information is exchanged with the sensor processing unit 30. Therefore, a neuron chip constituting the LON node is used for the interface 43.

FIG. 3 shows a state in which the operation panel section 40 is mounted on the main body of the traffic flow measuring device 20, and FIG. 1 shows a state in which the operation panel section 40 is detached from the main body. FIG. 3 (a)
Is a front view of the traffic volume measuring device 20, FIG. 3 (b) is a top view,
FIG. 3C is a perspective view. The apparatus main body has a door 51, and the door 51 is normally closed. FIGS. 3A and 3C show a state where the door is removed.

FIG. 1A is a front perspective view of the operation panel section 40 removed from the apparatus main body 20, and FIG.
5 is a perspective view of the back side of the operation panel unit 40. FIG. FIG. 1C shows the apparatus main body 20 from which the operation panel section 40 has been removed, and a cable 52 is connected between the apparatus main body and the operation panel section 40.
Connected by FIG. 1D is a top view of the apparatus main body from which the operation panel unit 40 has been removed. FIG. 1C shows the apparatus main body without the door.

Attachment of the operation panel section 40 to the apparatus main body 20
This is performed by using a stepped-out hinge 60 shown in FIG. The hinge 60 includes an insertion-side piece 61 and a reception-side piece 62.A shaft 63 is fixed to the insertion-side piece 61, and the shaft 64 is inserted into a hole of the reception-side piece 62. The side piece 61 and the receiving piece 62 are rotatably connected. FIG. 4A shows a state in which the insertion side piece 61 and the reception side piece 62 are connected, and FIG. 4B shows a state in which the insertion side piece 61 and the reception side piece 62 are separated.

On the back of the operation panel 40, on both sides thereof,
Two insertion-side pieces 61 of the step-and-pull hinge 60 are fixed at two positions, and two receiving pieces 62 of the step-and-pull hinge 60 are provided on both side walls at positions where the operation panel unit 40 inside the apparatus body 20 is mounted. Each one is fixed. Operation panel 40
The operation panel section 40 is mounted inside the apparatus main body 20 by inserting the shaft of each insertion-side piece 61 fixed to the back surface of the main body 20 into the hole of each receiving-side piece 62 fixed inside the apparatus main body 20. Conversely, from this mounted state, the operation panel unit 40 can be removed from the apparatus main body 20 by lifting the operation panel unit 40 upward and pulling out the shaft of the insertion side piece 61 from the hole of the reception side piece 62.

The receiving piece 62 of the stepped hinge 60 is also fixed to both outer walls of the casing of the apparatus main body 20. By engaging the insertion-side piece 61 on one side of the operation panel section 40 removed from the apparatus main body with the receiving side piece 62, the operation panel section 40 can be mounted outside the housing of the apparatus main body.

FIG. 2 shows a state in which the operation panel section 40 is mounted on the side wall of the housing of the apparatus main body 20. At this time, the operation panel section 40 is configured such that only the insertion piece 61 on one side is the receiving piece.
Since it is engaged with the hinge 62, it has a degree of freedom of rotation about the stepped hinge 60 composed of the insertion-side piece 61 and the receiving-side piece 62.

As described above, in this traffic flow measuring device 20,
Since the operation panel section 40 is detachable from the apparatus main body, the investigator who conducts collation inspection with visual observation removes the operation panel section 40 from the apparatus main body, and, depending on the lane to be observed, sets the operation panel section 40 in an easily viewable direction. Can be mounted outside the device housing.

In this way, by changing the mounting position of the operation panel unit 40 so that the display on the operation panel unit 40 is easy to see while observing the traveling vehicle, the workability of the collation check is improved.

At this time, the operation panel section 40 is rotated about the stepped hinge 60 so that the traveling vehicle and the display surface of the operation panel section 40 can be viewed together without moving the neck at all. As a result, the collation operation can be performed more easily.

In the case of rainy weather, the operation panel section 40 is
By connecting the operation panel unit 40 to a device main body with a cable 52 having a length of more than m, and placing the operation panel unit 40 in a location that is not wet by rain, a collation check can be performed. This cable can be extended up to about 20 m. In this way, by connecting a long cable, the investigation can be continued while avoiding rain, and the workability of the collation investigation in bad weather conditions is improved. be able to.

Although FIGS. 1 and 3 illustrate the case where the receiving piece 62 is attached to the left and right outer walls of the housing, the receiving piece 62 may be attached to the outer wall on the rear surface of the housing.
In the traffic flow measuring device 20 having a structure in which the outside of the device main body is covered with a heat shield plate, the receiving piece 62 may be attached to the heat shield plate.

Further, in this embodiment, the operation panel section 40 is mounted on the apparatus main body by using a stepped pull-in / out hinge, but it is of course possible to use other engaging members or support members. If the outer wall of the housing is formed of a magnetic material such as an iron plate, the operation panel unit 40 may be mounted on the outer wall of the housing using a magnet.

[0029]

As is apparent from the above description, the traffic volume measuring device of the present invention can enhance the workability in the collation survey between the visual observation and the automatic measurement, reduce the work load on the researcher, Further, the working environment in rainy weather can be improved.

[Brief description of the drawings]

FIG. 1 is an operation panel part (a) of the embodiment of the present invention, a back surface of the operation panel part (b), an apparatus main body (c) from which the operation panel part is removed, and a top view (d) thereof;

FIG. 2 is a perspective view showing an apparatus main body in which an operation panel unit according to the embodiment is mounted outside a housing;

FIG. 3 is a front view (a), a top view (b), a perspective view (c) of the traffic flow measuring device according to the embodiment;

FIG. 4 is a view showing a step-in / out hinge used in the traffic volume measuring device according to the embodiment;

FIG. 5 is a block diagram illustrating a configuration of a traffic measurement device according to the embodiment;

FIG. 6 is a block diagram illustrating a configuration of a sensor processing unit according to the embodiment;

FIG. 7 is a block diagram illustrating a configuration of an operation panel unit according to the embodiment;

FIG. 8 is a diagram showing an installation state of a traffic volume measuring device.

[Explanation of symbols]

 10 Sensing unit 11, 12 Loop coil 13 Traffic measuring device 21 Interface 22 Main processing unit 23 Transmission unit 30 Sensor processing unit 31 Ultrasonic sensing unit 32 CPU 33 ROM 34 RAM 35 Timer 36 Interface 38 Loop sensing unit 40 Operation panel unit 41 Connector 42 Power connector 43 Interface 44 Display switch 45 Specified switch 46 Select switch 47 Dynamic display 48 LED 51 Door 52 Cable 60 Stepped removal hinge 61 Insertion piece 62 Receiving piece 63 Shaft

Claims (7)

[Claims] In a traffic volume measuring device for automatically measuring the number of traveling vehicles based on a detection signal of a sensing unit installed on a road, an operation panel for displaying the measured number of vehicles is detachable from the device main body. A traffic flow measuring device, characterized in that: 2. The traffic flow measuring device according to claim 1, wherein a mounting member for mounting the operation panel is mounted outside the device main body. 3. The traffic flow measuring device according to claim 2, wherein the mounting member is attached to a plurality of outer surfaces of the device main body. 4. The traffic flow measuring device according to claim 2, wherein the mounting member is attached to a heat shield surrounding the device main body. 5. The method according to claim 1, wherein the mounting member comprises a stepped hinge, and one piece of the stepped hinge is attached to the operation panel, and the other piece of the stepped hinge is attached outside the apparatus body. The traffic volume measuring device according to any one of claims 2 to 4. 6. The traffic flow measurement device according to claim 5, wherein the operation panel is rotatably mounted on the outside of the device main body by the stepped hinge. 7. The traffic measurement device according to claim 1, wherein the operation panel and the device main body are connected by a cable exceeding 5 m.