JP2018180940A - Vehicle detection device and enclosure thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a burden on a worker involved in inspecting an ultrasonic head.SOLUTION: A vehicle detection device for detecting a vehicle using an ultrasonic head which receives a reflected wave from a vehicle traveling on a road by transmitting a transmission wave toward a road includes: an opening formed in a front surface; a door attached to the side surface so as to be freely opened and closed; an enclosure that is visible from the direction toward the front of the inside of the door when the door is opened; a detection circuit unit having a circuit board to be inserted into the enclosure through the opening and an operation panel attached to a front face of the enclosure; a battery-driven oscilloscope that is held inside the door in a state where a display surface can be visually recognized by a holding part and displays a waveform of the reflected wave on the display surface; and a battery housed in the enclosure and capable of supplying power to at least the detection circuit unit.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a vehicle detection device and a housing thereof.

  In order to measure the traffic volume of a highway, there is a traffic volume measurement system that detects vehicles traveling on the highway and counts the number of vehicles. The traffic measurement system includes, for example, an ultrasonic head and a detection circuit unit. The ultrasonic head is installed on the side of a highway (such as a road shoulder), emits ultrasonic waves (transmission waves) toward the road, and receives a reflected wave reflected by a vehicle traveling on the road. The detection circuit unit supplies a transmission wave signal to the ultrasonic head, and detects a vehicle by detecting a signal of a reflected wave received by the ultrasonic head.

  A plurality of traffic volume measurement points are determined on the expressway, and an ultrasonic head is installed at each measurement point. On the other hand, a detection circuit unit corresponding to each ultrasonic head is disposed in a building (for example, called a “communication building” or the like) separated from the ultrasonic head and centrally managed.

Unexamined-Japanese-Patent No. 11-15943

  The ultrasonic head is made of resin and is often damaged by stepping stones from the road. Even if breakage does not occur, the mounting angle of the ultrasonic head may change due to a stepping stone or the like, which may reduce the detection accuracy of the vehicle. When damage or the like occurs to the ultrasonic head, a worker goes to the site and performs replacement of the ultrasonic head and adjustment of the mounting angle. The suitability of the mounting state of the ultrasonic head is determined by observing the waveforms of the transmitted wave and the reflected wave.

  At this time, if the transmission and reception of the transmission wave and the reflection wave to the ultrasonic head and the waveform observation of these waves are performed using the detection circuit unit arranged in the communication building, the worker at the site will be the other worker located in the communication building. It is necessary to inquire the appropriateness or the like of the waveform, etc., and the labor and efficiency of the work decrease. For this reason, the operator brings the portable inspection equipment (inspection equipment and tools) to the work site for inspection.

  The inspection equipment included heavy equipment such as a portable detection circuit unit, an oscilloscope for observing the transmission wave and the reflected wave, and a gasoline engine type generator for supplying power thereto. In addition, inspection equipment included replacement ultrasonic heads, levelers, angle adjusters, etc., and the number of equipment and tools to bring was not small. Therefore, bringing inspection equipment to the site was a heavy labor.

  In addition, since the oscilloscope and the detection circuit unit are separate devices electrically connected via a cable, depending on the installation environment at these work sites, operate the detection circuit unit while observing the waveform of the oscilloscope. However, there was a risk that it was complicated or difficult.

  An object of the present invention is to provide a vehicle detection device capable of reducing the load on the transportation of inspection equipment and improving operability, and reducing the burden on the operator, and its casing.

The present invention adopts the following configuration in order to solve the problems.
That is, one of the aspects of the present invention is a vehicle detection device that detects a vehicle using an ultrasonic head that transmits a transmission wave toward a road and receives a reflected wave of the transmission wave from a vehicle traveling on the road. It is. In this vehicle detection device, an opening is formed on the front and a door is attached to the side so as to be openable and closable, and a housing capable of visually recognizing the inside of the door from the direction toward the front when the door is open It has a circuit board inserted in the case through the opening and an operation panel attached to the front of the case, and supplies the signal of the transmission wave to the ultrasonic head and receives the signal of the reflection wave The display unit has a circuit unit and a display surface, and is held inside the door in a state where the display surface can be viewed by a holding unit, and is electrically connected to the detection circuit unit to display the waveform of the reflected wave as the display surface And a battery which is housed in the housing and capable of supplying power to at least the detection circuit unit.

  The vehicle detection device may be arranged such that the display surface faces in substantially the same direction as the operation panel in the open state of the door.

  The vehicle detection device may be configured such that the outer surface of the door and the side surface of the housing are substantially flush when the door is closed.

  Another aspect of the present invention is a vehicle detection apparatus for detecting a vehicle using an ultrasonic head that transmits a transmission wave toward a road and receives a reflected wave of the transmission wave from a vehicle traveling on the road. It is a case. The housing is formed in the front of the housing, and an opening into which a circuit board included in a detection circuit unit that supplies the signal of the transmission wave to the ultrasonic head and receives the signal of the reflection wave is inserted An attachment portion for attaching an operation panel included in the detection circuit unit to a front surface of the housing, and a side surface of the housing openably and closably attached to the housing; A door that can be viewed from the outside, and a holding unit that is electrically connected to the detection circuit unit to display the waveform of the reflected wave and that can be viewed on a display surface of a battery-powered oscilloscope in a visible state; And at least a storage space of a battery capable of supplying power to the detection circuit unit.

  ADVANTAGE OF THE INVENTION According to this invention, load reduction of conveyance of the installation for test | inspection and operativity improvement can be aimed at, and a worker's burden can be reduced.

FIG. 1 is a front view of a vehicle detection device. FIG. 2 is a rear view of the vehicle detection device. FIG. 3 is a left side view of the vehicle detection device. FIG. 4 is a right side view of the vehicle detection device. FIG. 5 is a perspective view of the vehicle detection device. FIG. 6 is a view for explaining the mounting state of the operation panel and the circuit board with respect to the housing and the storage state of the battery. FIG. 7 is an explanatory view of the relationship between the installation state of the ultrasonic head on the road and the waveform of the oscilloscope. FIG. 8 is a diagram showing a circuit configuration of the vehicle detection device. FIG. 9 shows an example of the display screen of the oscilloscope.

Hereinafter, embodiments of the present invention will be described based on the drawings. The configuration of the following embodiment is an exemplification, and the present invention is not limited to the configuration of the embodiment.

  1 is a front view of the vehicle detection device, FIG. 2 is a rear view of the vehicle detection device, FIG. 3 is a left side view of the vehicle detection device, and FIG. 4 is a right side view of the vehicle detection device FIG. 5 is a perspective view of the vehicle detection device. FIG. 6 is a view for explaining the mounting state of the operation panel and the circuit board with respect to the housing and the storage state of the battery. FIG. 7 is an explanatory view of the relationship between the installation state of the ultrasonic head on the road and the waveform of the oscilloscope. FIG. 8 is a diagram showing a circuit configuration of the vehicle detection device, and FIG. 9 shows an example of a display screen of an oscilloscope.

  The vehicle detection device 10 according to the embodiment detects a vehicle traveling on a road using the ultrasonic head 2. For example, as shown in FIG. 7, the ultrasonic head 2 is installed on the side of a road (highway) 1 and radiates (transmits) an ultrasonic wave (transmission wave) toward the road 1. The ultrasonic head 2 also receives a reflected wave of the transmission wave reflected by the vehicle 3 traveling on the road 1.

  The vehicle detection device 10 according to the embodiment has portability and is used as an adjustment device of the ultrasonic head 2. For example, as shown in FIG. 5, the vehicle detection device 10 has a rectangular parallelepiped casing 11 having a depth.

  A detection circuit unit 22A is attached to the vehicle detection device 10. The detection circuit unit 22A includes an operation panel 21 and a circuit board 22. An operation panel 21 is attached to the front wall of the housing 11. The front wall of the housing 11 is used as a mounting portion for mounting the operation panel 21. A lamp group, switches, terminals and the like are arranged on the front surface 21A of the operation panel 21 (FIG. 1, FIG. 5).

  For example, in the front face 21A, as the lamp group 14, a "transmission" lamp that lights up when transmitting a transmission wave, a "detection" lamp that lights up when a reflected wave is detected, and lights up when a failure is detected. A "fault" lamp is provided. Further, on the front face 21A, an adjustment dial 15 of a near gate and an adjustment dial 16 of a far gate are provided as adjustment units. Furthermore, on the front face 21A, as a terminal group, a "reception" terminal 17a, a "synchronization" terminal 17b, a "common (ground)" terminal 17c, and a connector 18 for connection to a personal computer are provided.

  As shown in FIG. 6, the circuit board 22 extends from the back surface 21B of the operation panel 21, and the operation panel 21 and the circuit board 22 are connected (formed integrally). The circuit board 22 includes a circuit for generating and outputting a transmission wave signal to be sent to the ultrasonic head 2, a reception circuit for the reflected wave signal received by the ultrasonic head 2, and a waveform generation circuit for supplying an oscilloscope 40 Electrical and electronic circuits are implemented.

  An opening 12 (slot: see FIG. 6) through which the circuit board 22 can be inserted and removed is formed on the front wall of the housing 11. The circuit board 22 has the back 21B of the operation panel 21 of the front of the housing 11 It is accommodated in the inside of the housing | casing 11 by inserting in the opening part 12 until it contact | abuts on the wall surface. Through-holes 21a and 21b are formed in the operation panel 21 so as to pass from the front surface 21A to the back surface 21B, and the operation panel 21 is fixed to the front wall (attachment portion) of the housing 11 using bolts 23A and 23B. Be done. In the example shown in FIG. 6, bolt holes of bolts 23A and 23B are formed in the front wall, and bolt 23A is screwed with nut 24A in housing 11, and bolt 23B is inside housing 11. And screw together with the nut 24B.

The vehicle detection device 10 is connected to the ultrasonic head 2 via a cable 4 (see FIG. 5). A connector 13 connected to the cable 4 is provided on the back surface (FIG. 2) of the housing 11, and the ultrasonic head 2 is electrically connected to the detection circuit unit 22A via the cable 4 and the connector 13. .

  Inside the housing 11, a battery 27 (FIG. 6) serving as a power supply for the detection circuit unit 22A, and a power supply circuit 28 (FIG. 8) for converting a DC voltage of the battery 27 into a DC voltage corresponding to the detection circuit unit 22A. An accommodation space is provided to accommodate the The battery 27 is, for example, a lithium ion secondary battery. However, other types of batteries may be applied as long as the desired power can be supplied. The power supply circuit 28 is electrically connected to the detection circuit unit 22A in the housing 11, and operates by receiving the power from the power supply circuit 28.

  A door 30 is attached to the left side surface of the housing 11 so as to be openable and closable. 1, 2 and 5 show the open state of the door 30, and FIG. 3 shows the closed state of the door 30. The door 30 is rotatably attached to the housing 11 using a hinge 34 (an example of a connection portion) which is an example of a connection portion. The door 30 is opened by pivoting from the front to the back of the housing 11 and is closed by pivoting from the back to the front of the housing 11. That is, the inner surface 30 b of the door 30 can be viewed from the direction toward the front of the housing 11 in the open state.

  The door 30 can be turned at least 90 ° from the closed position, and the inner surface 30 b of the door 30 can face the front of the housing 11. FIGS. 1 and 2 illustrate a state where the door 30 is rotated approximately 90 degrees. In the embodiment, the door 30 is pivotable from the closed state to nearly 180 °.

  In the closed state, the outer surface 30a of the door 30 is formed to be substantially flush with the right side surface of the housing 11 (FIG. 3). Thereby, the compactization of the vehicle detection device 10 at the time of conveyance is achieved. The housing 11 is provided with fasteners 32, and the fasteners 32 are used to keep the door 30 closed. This can prevent the door 30 from being opened at the time of transportation. In addition, illustration of the fastener 32 is abbreviate | omitted in FIG.

  The inside of the door 30 is hollow and serves as a housing space (housing portion) capable of housing a thin (for example, flat or card-like) oscilloscope 40, and the oscilloscope 40 is housed in the housing portion inside the door 30. It is held by being done. The upper part of the door 30 is a lid 33 which is opened and closed by the hinges 31a and 31b. The internal space (accommodation unit) of the door 30 functions as a holding unit that holds the oscilloscope 40.

  A window 30 c is formed on the inner surface 30 b of the door 30. The oscilloscope 40 includes a display panel 41 (for example, a liquid crystal display). When the oscilloscope 40 is housed, the display surface (screen) of the display panel 41 is visible from the outside through the window 30 c. The opening angle of the door 30 may be an angle at which the display surface of the display panel 41 of the oscilloscope 40 held in the door 30 can be substantially directed to the front, and in that limit, it is an angle of 90 ° or less It is good. Instead of the configuration in which the oscilloscope 40 is housed in the door 30, a holder or a band may be provided on the inner surface of the door 30, and the oscilloscope 40 may be held by the holder or the band.

  As shown in FIG. 5, when the door 30 is opened, an opening 35 to the inside of the housing 11 is formed. The opening 35 is used to carry in and out the battery 27 (FIG. 6) or the like. Further, inside the housing 11, two probes for connecting the oscilloscope 40 and the detection circuit unit 22A are accommodated. Each probe is connected to an oscilloscope 40, one of which is connected to the "receive" terminal 17a and the other to the "common" terminal 17c. FIG. 5 exemplifies the state of the probe 36 connected to the “reception” terminal 17 a, and the other probe is not shown. The oscilloscope 40 and the detection circuit unit 22A may be connected within the housing 11 and the probe may be omitted.

  In addition, the vehicle detection apparatus 10 is used outdoors, and the housing | casing 11 and the door 30 are metal, such as stainless steel and aluminum, in consideration of the durability with respect to wind and rain. However, materials other than metal such as resin may be applied. The oscilloscope is separated from the display unit having the main body and the display panel 41, and the main body and the display unit can communicate with each other in a wired or wireless manner, and the display unit of the main body and the display unit is the door 30. It may be held inside and the main body may be housed in a housing.

  FIG. 8 shows a circuit configuration of the vehicle detection device 10. The detection circuit unit 22A mounted on the circuit board 22 housed in the housing 11 is connected to the ultrasonic head 2 and to the oscilloscope 40. The oscilloscope 40 has a display panel 41 and also has a built-in battery 42, and is driven using the power of the built-in battery 42. The power supply circuit 28 converts the DC voltage of the battery 27 into a DC voltage for the detection circuit unit 22A and supplies the DC voltage to the detection circuit unit. Further, power for charging the built-in battery 42 is supplied from the power supply circuit 28. The power supply circuit 28 may generate a direct current voltage (power) for driving the oscilloscope 40 and supply it directly to the oscilloscope 40.

  Hereinafter, an inspection using the vehicle detection device 10 will be described. The operator visits the work site using the inspection equipment including the vehicle detection device 10, the cable 4 and the ultrasonic head 2, connects the ultrasonic head to the vehicle detection device 10, and the appropriate position (the side of the road ) At a predetermined mounting angle. As a result, ultrasonic waves are emitted from the ultrasonic head 2 toward the road 1.

  The vehicle detection apparatus 10 and the oscilloscope 40 are powered on, and the detection circuit unit 22A and the oscilloscope 40 are connected using a probe. The detection circuit unit 22A sends the signal of the transmission wave to the ultrasonic head 2, and the ultrasonic wave of the transmission wave is emitted from the ultrasonic head 2 toward the road 1. In addition, at the time of transmission of a transmission wave, detection circuit unit 22A lights a "transmission" lamp. When the vehicle 3 travels on the road 1 and the transmission wave is reflected, the reflection wave is received by the ultrasonic head 2 and a signal of the reflection wave is input to the detection circuit unit 22A via the cable 4 and the connector 13.

  The detection circuit unit 22A can detect the vehicle 3 by detecting the signal of the reflected wave. When the vehicle 3 is detected, the detection circuit unit 22A turns on the "detection" lamp. The detection circuit unit 22 A generates a signal for observation with the oscilloscope 40 and supplies the signal to the oscilloscope 40.

  The waveforms displayed on the display surface of the display panel 41 of the oscilloscope 40 will be described with reference to FIG. In the waveform of the oscilloscope 40, time flows from left to right, and the rise time (referred to as near gate) and the fall time (far gate) of the signal are set. The near gate and the far gate are set in accordance with the width of the road 1 in consideration of the distance from the ultrasonic head 2 to the road 1 (road shoulder) and the distance of the width of the road 1. The position of the near gate can be adjusted by operating the adjustment dial 15, and the position of the far gate can be adjusted by operating the adjustment dial 16. A waveform representing the transmission wave is observed in front of the near gate, and a waveform representing the reflected wave is observed between the near gate and the far gate.

  FIG. 9 shows an example of waveforms displayed on the display surface of the display panel 41. As shown in FIG. 9A, when there is no vehicle 3, no reflected wave is observed. On the other hand, as shown in FIG. 9B, when the vehicle 3 crosses (passes) the radiation range of the transmission wave, a reflected wave is observed. In addition, a personal computer (not shown) is connected to the vehicle detection apparatus 10, and the traffic volume per time can be calculated by counting the number of detections of the vehicle 3.

  The operator adjusts the near gate and the far gate or adjusts the installation state of the ultrasonic head while observing the waveform. Then, when an appropriate waveform is observed, the inspection and adjustment are finished, and the ultrasonic head 2 is connected to the detection circuit unit of the communication building.

  According to the embodiment, the vehicle detection device 10 has the opening 12 formed on the front and the door 30 attached to the side so as to be openable and closable, and the inside of the door 30 is viewed from the direction toward the front when the door 30 is open. A possible housing 11 is included. In addition, the vehicle detection device 10 has a circuit board 22 inserted into the housing 11 through the opening 12 and an operation panel 21 connected to the circuit board 22 and removably attached to the front of the housing 11. It includes a detection circuit unit 22A that supplies a signal of a transmission wave to the sound wave head 2 and receives a signal of a reflected wave.

  Furthermore, the vehicle detection device 10 has the display panel 41, is held inside the door 30 in a state in which the display panel 41 can be viewed by the holding portion, is electrically connected to the detection circuit unit 22A, and has a waveform of a reflected wave. And a battery-powered oscilloscope 40 for displaying on the display panel 41. And the vehicle detection apparatus 10 is accommodated in the housing | casing 11, and contains the battery 27 which can supply electric power to at least detection circuit unit 22A. The holding portion includes, for example, a housing portion of the oscilloscope 40 formed in the door 30, and a window 30c for visually recognizing from the outside the display panel 41 (display surface) of the oscilloscope 40 housed in the housing portion. In the embodiment, the window 30c is an opening, but at least a part of the opening forming the window 30c may be closed by a transparent or translucent member.

  According to the vehicle detection device 10, since the detection circuit unit 22A, the oscilloscope 40, and the battery 27 are integrally mounted or housed in the housing 11, as in the conventional case, individual gasoline engine type generators As compared with the case where the detection circuit unit and the oscilloscope are brought to the site, the number and volume (volume) of equipment and tools to be transported can be reduced. Therefore, the transfer work of the inspection equipment to the work site becomes easy. Further, by using a battery instead of the generator, the weight of the inspection equipment can be reduced, and also in this respect, the transportation operation can be facilitated.

  Furthermore, according to the vehicle detection device 10, the display surface of the display panel 41 can be arranged to face substantially the same direction as the front of the operation panel 21 by adjusting the rotation angle (opening angle) of the door 30. It is preferable to adjust the gate (close gate, far gate) while looking at the screen (waveform).

  Furthermore, according to the vehicle detection device 10, the outer surface of the closed door 30 is formed to be substantially flush with the side surface of the housing 11. As a result, the vehicle detection device 10 can be made compact, and conveyance of the vehicle detection device 10 can be facilitated. As mentioned above, according to the vehicle detection apparatus 10, replacement | exchange thru | or inspection operation | work of the ultrasonic head 2 can be made easy. That is, it is possible to reduce the load of transport of the inspection equipment and to improve the operability, and to reduce the burden on the operator.

Reference Signs List 1 road 2 ultrasonic head 3 vehicle 10 vehicle detection device 11 housing 12 opening portion 21 operation panel 22 circuit board 22A · · · Detection circuit unit 27 · · · Battery 28 · · · power circuit 30 · · · door 30a · · · outer surface 30b · · · inner surface 30c · · · window 34 · · · hinge (connection portion)
35: Opening 40: Oscilloscope 41: Display panel

Claims (4)

A vehicle detection apparatus for detecting a vehicle using an ultrasonic head that transmits a transmission wave toward a road and receives a reflected wave of the transmission wave from a vehicle traveling on the road,
A case in which an opening is formed in the front and a door is attached to an openable / closable side, and in the open state of the door, the inside of the door can be viewed from the direction toward the front;
It has a circuit board inserted into the housing through the opening and an operation panel attached to the front of the housing, and supplies the signal of the transmission wave to the ultrasonic head and receives the signal of the reflection wave. Detection circuit unit,
A battery that has a display surface, is held inside the door in a state in which the display surface can be viewed by a holding unit, is electrically connected to the detection circuit unit, and displays the waveform of the reflected wave on the display surface Driving oscilloscope and
A vehicle detection device comprising: a battery housed in the housing and capable of supplying power to at least the detection circuit unit. The vehicle detection device according to claim 1, wherein the display surface is arranged to face substantially in the same direction as the operation panel in the open state of the door. The vehicle detection device according to claim 1 or 2, wherein in the closed state of the door, the outer surface of the door and the side surface of the housing are substantially flush. A housing of a vehicle detection device for detecting a vehicle using an ultrasonic head that transmits a transmission wave toward a road and receives a reflected wave of the transmission wave from a vehicle traveling on the road,
An opening formed in the front of the housing, into which a circuit board included in a detection circuit unit that supplies the signal of the transmission wave to the ultrasonic head and receives the signal of the reflected wave is inserted;
An attachment portion for attaching an operation panel included in the detection circuit unit to the front of the housing;
A door which is openably and closably attached to the side surface of the housing and which can be viewed from the direction toward the front of the housing in the open state;
A holding unit electrically connected to the detection circuit unit and holding the display surface of the battery-powered oscilloscope that displays the waveform of the reflected wave in a state in which the display surface of the oscilloscope can be visually recognized;
A storage space of a battery capable of supplying power to at least the detection circuit unit;
A housing of a vehicle detection device including:

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