KR940008196B1 - Speed detector for traffic control - Google Patents

Abstract

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Description

Traffic detection device

1 is a cross-sectional view of a strip member according to the present invention.

2 is a plan view of an insulating spacer layer.

3 is a disassembled parts arrangement diagram.

4 is a cross-sectional view showing a strip attached to a road surface.

5 is an illustration of how a vehicle passing over a stretch strip is sensed by its timer width.

6 is a block diagram of an embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

1 strip 2 base layer

3, 7: contact device 4: insulating spacer layer

5: hole 6: elastic layer

8: cover layer 9: wire

The present invention relates to a traffic detection device for monitoring the flow and speed of the vehicle passing through the road. Conventionally, there has been a demand for an effective device for monitoring the flow and speed of traffic on public roads. Until recently, radar systems were known as the most accurate speed measurement devices, but they were expensive to check the targets for which materials were expensive and speed was detected. There was a defect such as not.

Amphometers based on treadle switches or air cables are inexpensive and relatively accurate, but the switches themselves have poor triggering characteristics when actuated by vehicle passages, resulting in accurate speed recording. To this end, a large gap is required between the two sensors, and two separate sensors have to have a distance of 3 meters or more on the road surface. In addition, the ammeter has difficulty in identifying the position of the vehicle on the surface of the road, moreover, its structure is weak and its life is not suitable for the sensor installed on the road.

On the other hand, the supervision and coordination of traffic polices is not economical because a large number of officials are required to control the road rules, and the speed measuring device using radar and the traffic camera facility using loop detectors have emerged. Costly, radar-based systems generally require operators and radar / camera systems, but are rarely unmanned due to their high cost and vulnerability to destruction.

Such surveillance systems were inefficient and impractical. Therefore, the object of the present invention is to overcome the above-mentioned shortcomings with economical and simple equipment by allowing the contact devices acting as pressure switches in the strip to be installed at a small interval of about 10 cm, and the traffic police officer is installed with a large number of traffic monitoring systems. To eliminate the need for monitoring.

In addition, the present invention is to provide a traffic detection device that can detect the speed and details of the vehicle passing through the road and the number and type of vehicles.

To this end, in the present invention, an elongate strip member is connected to a monitoring / timing device for sensing the power and the speed and type of the vehicle, and is installed across a predetermined position on the road.

In addition, when the camera device is connected to the monitoring device of the present invention and the speed of the vehicle passing over the strip exceeds the speed limit, it is possible to take a picture of the vehicle passing through the operation.

The simplest embodiment of the present invention comprises an elongated strip member for monitoring vehicle traffic and two or more contacting devices fixed in a longitudinal and continuous interval in the longitudinal direction of the strip member and one or more vehicles over the strip. On passing, the device is adapted to operate a monitoring / timing device connected thereto.

In another embodiment of the present invention, an elongated strip member is attached to the road surface to monitor vehicle traffic, the strip member comprising: a base layer; At least two contact lines extending longitudinally and laterally spaced apart from the upper surface of the base layer; A dielectric spacer layer layered on the top surface of the base layer; A plurality of apertures arranged longitudinally in the insulating spacer layer and spaced apart laterally; A resilient material layer extending over the insulating spacer layer; At least two electrical contact devices extending in the longitudinal direction and spaced laterally on the lower surface of the elastic material layer and positioned over the holes of the insulating spacer layer; Means for supplying a voltage to the electrical contact device, wherein in such an arrangement the electrical contact device on the elastic material layer is passed through a hole in the insulating spacer layer when one or more vehicles pass over the strip member. And a circuit for contacting the electrical contact device to operate the monitoring or timing device associated with the strip member.

A cover layer may also be provided on the upper surface of the elastic material layer to protect the device according to the invention from wear and weather.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The elongated strip member 1 of the present invention comprises a base layer 2 made of a suitable material, such as an aluminum sheet or a polyester film, which base layer 2 is installed across a road, or other monitored area. It is long enough to fit and has a suitable width depending on the area to be applied.

A contact device 3 extending in the longitudinal direction and spaced apart laterally is installed on the base layer 2 in a suitable manner such as screen printing using conductive ink.

The contact devices 3 are preferably installed over the entire length of the base layer 2 and are ideally spaced apart from each other to rise to the distance at which the speed of the vehicle is to be measured. On the upper surface of the base layer 2 is provided an insulating spacer layer 4 made of a suitable material such as screen-printable insulating ink spacer material. However, the material of the insulating spacer layer 4 is not limited to the above materials, but may be made of other suitable materials or forms, or may be formed by coating a coating film or the like.

The insulating spacer layer 4 ideally has a dimension which is equal to or slightly larger than the size of the electrical contact device 3 installed on the base layer 2, and is provided on the contact device 3. It is preferable that a plurality of holes 5 are formed in the insulating spacer layer 4, and these holes 5 form a row as shown in FIG. The holes 5 are preferably arranged in pairs, spaced apart laterally at regular intervals, and are arranged long along the side of the insulating spacer layer 4 with their edges inward. As shown in FIG. 3, the hole 5 is preferably elongated but other shapes are also possible.

An elastic layer 6 is provided on top of the insulating spacer layer 4, which is formed from a plastic or other material that is elastic or at least flexible. Ideally, the elastic material is an elastic body known as MYLAR ^* , and the elastic material is also preferable as the material of the base layer 2. However, other materials with properties similar to MYLAR may be employed. In either case, it is important that the material of the elastic layer 6 has elasticity that can be returned to its original state when pressure is applied and then removed.

Under the elastic layer 6, conductive contact devices 7 are formed which extend in the longitudinal direction and are spaced apart from each other laterally by a suitable method such as screen printing conductive ink.

Preferably the contact device 7 extends over the entire length of the elastic layer 6 and is spaced apart from each other at intervals corresponding to the distance at which the speed is to be measured.

The elastic layer 6 is attached directly on the upper surface of the insulating layer 4 or directly on the base layer 2 when the insulating layer 4 does not extend to the entire surface of the base layer 2. Is positioned over the hole 5 of the insulating spacer layer 4 so that the elastic layer 6 and the contact device 3, 7 can move relative to or through the hole 5, and Use bonding agents or other adhesives.

The upper cover layer 8 may be provided on the elastic layer 6 through film, paint, surface coating, etc. to protect the strip from abrasion and weather.

The base layer 2, the insulating spacer layer 4 and the elastic layer 6 may be called "membrane switches" and form a key part of the traffic detection apparatus according to the present invention.

The device according to the invention is supplied from the power supply via a suitable wire (9) to a contact device (3) (7) of the base layer (2) and the elastic layer (6) and the wire is monitored in relation to the strip from the strip. And / or to the timing device.

In the case where the device according to the present invention is installed across the road, the elastic layer 6 provided with the contact means 7 is pressed by the pressure of the vehicle when the vehicle passes over the strip 1, so that the hole of the insulating spacer layer 4 is carried out. It may pass through (5) to be in contact with the contact device 3 of the base layer 2 to serve as a switch for operating the monitoring and / or timing device connected with the contact means 7 and 3.

After the vehicle passes over the strip 1, the pressure is removed and the elastic layer 6 returns to its original position, disconnecting the contact means 7 from the contact means 3. That is, the hole 5 is combined with the contact device 3 and 7 elastically installed with the base layer 2 to constitute a transducer or a switch.

Therefore, the strip 1 is essentially provided with a plurality of switches extending in the longitudinal direction and maintaining a constant distance from each other in the lateral direction. The switches thus configured can be divided into appropriate groups or individually connected to the control unit. In case of using individual switch, the shorter the resolution, the bigger the resolution.

As illustrated in the accompanying drawings and in the description of the invention, the holes 5 and the switches formed thereby are spaced from one another in the longitudinal and lateral directions. The present invention may be practiced by maintaining a predetermined distance from each other while connecting the holes in the edge of the insulating spacer layer 6 in the form of one long slot, each preferably in the longitudinal direction as shown in the accompanying drawings. The plurality of holes 5 which are separated from each other are to be paired.

In a preferred type of the invention, as in the example shown in FIG. 6, the wires 9 connect each switch arrangement to a suitable sensing and / or timing device such that one or more switches are operated when the vehicle passes over the strip.

As the switch device as well as the vehicle passes over the contact device 7, the contact device 7 is pressed and connected to the contact device 3 of the base layer through the hole 5 to operate the monitoring and / or timing means. Or switch inactive. Preferably, the monitoring and / or timing device is a microcomputer or a programmed control device programmed or input with appropriate information relating to speed limits or tire widths for various types of vehicles, for example for motor vehicles. Information relating to the highest speed may be programmed into the monitoring or control device and the switch in the present invention may be connected to the control device or may be programmed and other information as well.

In the embodiment of the present invention, when the normal speed of the vehicle is programmed in the monitoring or control device, the contact device 7 of the elastic layer 6 is the contact device of the base layer 2 when the vehicle wheel passes through the first contact device. When the timing device is operated by touching (3) and the vehicle wheel passes through the second contact device (3) and (7), the connection between the first contact device (3) and (7) is disconnected and the timing device is turned off.

The speed limit programmed in the monitoring device is then compared with the speed of the vehicle over a given interval (interval between the contact lines) and recorded as needed if the speed of the vehicle exceeds the programmed speed limit. Preferably, the monitoring device is connected to a camera located near the strip so that a photo recording details such as date, time, location, location, etc. in case of speed violation may be used as evidence for speeding up the violating vehicle.

If a more accurate one is desired in the present invention, the monitoring device may be provided with a time delay program that can measure the speed of both the front and rear wheels of the vehicle. In this case, the monitoring device is activated / deactivated when the front wheel of the vehicle passing through the strip passes the primary contact as described above, and the rear wheel of the vehicle arrives on the strip immediately after the front wheel of the vehicle quantity is deactivated by leaving the strip. A time delay is initiated for the possible time and the monitoring device is activated / deactivated in the same way as the rear wheel passes the strip.

A monitoring device may be provided in the monitoring device that compares the time when the front and rear wheels pass on the strip so that the appropriate camera device or the like may be operated if the times are within the permissible range but exceed the programmed speed limit.

Individual switches and switch groups are maintained at regular intervals along the length of the strip to detect the independent speed of each vehicle. The resolution of the strip is determined by the length of each switch or each group of switches.

For example, if the length of each switch or each group switch is 5cm, and one or two adjacent switches are operated by the front wheel of the vehicle, the tire width is judged to be less than 10cm, so that it belongs to a bicycle or a motorcycle. If three to five adjacent switches are activated, the tire width will be at least 10 cm and at most 25 cm, indicating that it is a car. If five or more adjacent switches are activated, the vehicle is identified by truck or bus. In the above example, the length is 5 cm, but the shorter the switch, the higher the resolving power, which is clearly shown in FIG.

As an additional feature or alternative to the features listed above, the monitoring device may be programmed to detect the number of vehicle marks and types of vehicles passing on the strip and to check the speed limit for a particular vehicle. For example, a monitoring device can be programmed to recognize that a bicycle or motorcycle is passing over a strip when a pair of contactors are operated, and to compare the speed that is programmed for that type with the speed that passes over the strip.

If three contacts are activated, this means that the car will pass over the strip, and if five or six are operated, this will indicate that the truck or bus will pass over the strip. The speed of a particular vehicle over the strip is then compared to the speed limit of the specific vehicle programmed in the monitoring device. Furthermore, if the strip of the present invention is installed across multiple lanes on a road or highway, the monitoring device may be programmed to detect not only the speed and type of the vehicle but also the lane through which the vehicle passes, for example a highway with many lanes The first 10 slots or holes through which the contact device passes may be installed in one lane, the next ten lanes, and the next ten lanes. The number of holes and slots through which the contact device passes may vary depending on the size, shape of the holes or slots, the arrangement of the strips, and the like. If necessary, the monitoring device may be provided with an additional device such as a warning light or a recording device in addition to a camera for taking a picture of the vehicle, so that statistics or other details of the passing vehicle may be recorded.

In one method using the strip of the present invention, the strips are operated by the driver and the strips of the deactivated cheat-free strips of the same color are prominently colored and mixed and installed in a plurality on the road so that the driver can operate a strip. It is also possible to increase the effect of reducing the speed of the vehicle by arranging it unknowingly and not operating.

Although a particular type of switch device and a contact device have been described above, other types of switches may be used. The pressure-sensitive polymer may be installed in a hole to allow the contact devices to contact each other.

In the present invention, the pressure by the vehicle tire is higher than the pressure applied to a general "membrane" switch, and the area under pressure is very large, for example, the width of the tire is very wide when compared to the fingertips, so that the insulation spacer Slots or holes 5 in the floor 4 should be dimensioned to withstand harsh road conditions.

In the conventional general membrane switch, the shape of the hole with respect to the maximum pressure did not need to be greatly considered. However, in the present invention, when the switch is operated by the traffic vehicle, the upper contact device is forced to pass through the slot or hole 5 in the insulating spacer layer 4, which is the air in the gap. The air resident is compressed as long as it cannot escape from the hole. If the tire contact spans the entire hole, the air drawn into the gap is compressed to the tire pressure actuating the switch. In many cases, each side of the hole is subject to unbearable stress and its surroundings can lead to fatigue breakdown.

However, by designing the hole properly, it is possible to avoid overcompressing the air, which causes the air to escape to other areas of the hole. The length of the hole or slot directly affects the maximum level of pressure and the actuation / deactivation characteristics of the switch are also directly related to the slot design. Therefore, the maximum pressure formed inside the switch will affect the operating pressure of the switch.

In a preferred embodiment according to the present invention, each hole 5 of the insulating spacer layer 4 is formed with a length of 30 cm and a width of 2 mm, and the thickness of the insulating spacer layer 4 is 10 micrometers.

The design parameters of the hole allow the maximum pressure in the switch to be adjusted so that it does not exceed the acceptable level, and this adjusted pressure helps the switch to stop as soon as the pressure that triggered the switch is removed.

The strip according to the invention is attached to the road surface 10 with a suitable adhesive such as a flexible epoxy resin adhesive 11 as in FIG. The adhesive evens out the surface to which the strip will be attached.

The contact devices 3 and 7 in the present invention are fixed at regular intervals in the strip 1 to overcome the shortcomings of the conventional ampometa, which have been difficult to maintain accurate spacing to the sensor in the field, and quickly. While easily installed, accurate distances can be measured on site.

In the present invention, the contact devices 3 and 7 and the switches are laterally and longitudinally spaced at known intervals, which is particularly advantageous for speed measurement. In addition, the strip is completely sealed and rigid, providing a sensor that can be used for a long time on the road surface, and its rigid properties and strong adhesion to the road surface are not easily broken. On the other hand, it is also possible to reduce the breakage by mixing and arranging the strips that operate and the strips that do not operate as described above.

Claims (8)

A traffic sensing device in the form of an elongate strip (1) member that can be disposed on a road surface, the strip (1) member comprising a base layer (2); An upper surface of the base layer 2 is provided with at least two electrical contacts 3 extending in the longitudinal direction and spaced laterally in a lateral direction; An insulating spacer layer 4 is provided on the upper surface of the base layer 2; The insulating spacer layer (4) is formed with a plurality of holes (5) spaced in the longitudinal direction and laterally and positioned on the electrical contact device (3) provided on the upper surface of the base layer (2); An elastic layer 6 is provided on the insulating spacer layer 4; On the lower surface of the elastic layer 6, at least two consecutive electrical contacts 7 extending longitudinally and laterally spaced are placed on the holes 5; The holes 5 and the electrical contact devices 3 and 7 form a plurality of switches spaced in the longitudinal direction; Each switch is coupled to a monitoring and / or timing device connected to the strip 1 member; A device for supplying power across the electrical contact devices (3) (7) is provided; The arrangement is such that when one or more vehicles pass over the strip (1) member, an electrical contact device (7) installed in the elastic layer (6) passes through the hole (5) to make electrical contact device on the base layer (2). (3) a traffic detection device in contact with one or more of said switches to operate said monitoring and / or timing device. 2. A traffic sensing device according to claim 1, wherein said strip (1) member is attachable to a road. 2. A traffic sensing device according to claim 1, wherein said electrical contact device (3) is formed by screen printing electroconductive ink. The traffic detection device according to claim 1, further comprising a cover layer (8) formed on the upper surface of the elastic layer (6). 2. The electrical measuring device (3) (7) on the base layer (2) and the elastic layer (6) is a speed measurement distance from another electrical contact device (3) (7) on the same layer. Traffic sensors spaced apart from each other at intervals. 2. A traffic sensing device according to claim 1, wherein said base layer (2) and said elastic layer (6) are flexible resin or plastic materials. 2. A traffic sensing device according to claim 1, wherein said strip (1) member is comprised of a membrane switch. 2. A traffic sensing device according to claim 1, wherein said strip (1) member can be attached to a road surface by an adhesive.