KR20090046392A - Traffic monitoring apparatus using terrestrial magnetism sensor - Google Patents

Traffic monitoring apparatus using terrestrial magnetism sensor Download PDF

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Publication number
KR20090046392A
KR20090046392A KR1020070112504A KR20070112504A KR20090046392A KR 20090046392 A KR20090046392 A KR 20090046392A KR 1020070112504 A KR1020070112504 A KR 1020070112504A KR 20070112504 A KR20070112504 A KR 20070112504A KR 20090046392 A KR20090046392 A KR 20090046392A
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KR
South Korea
Prior art keywords
geomagnetic sensor
case
traffic information
road
information measuring
Prior art date
Application number
KR1020070112504A
Other languages
Korean (ko)
Inventor
김민식
박경훈
이규완
Original Assignee
김민식
박경훈
이규완
Priority date (The priority date 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 date listed.)
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Application filed by 김민식, 박경훈, 이규완 filed Critical 김민식
Priority to KR1020070112504A priority Critical patent/KR20090046392A/en
Publication of KR20090046392A publication Critical patent/KR20090046392A/en

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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F11/00—Road engineering aspects of Embedding pads or other sensitive devices in paving or other road surfaces, e.g. traffic detectors, vehicle-operated pressure-sensitive actuators, devices for monitoring atmospheric or road conditions
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
    • G08G1/0108—Measuring and analyzing of parameters relative to traffic conditions based on the source of data
    • G08G1/0116—Measuring and analyzing of parameters relative to traffic conditions based on the source of data from roadside infrastructure, e.g. beacons
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/02—Detecting movement of traffic to be counted or controlled using treadles built into the road
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/042—Detecting movement of traffic to be counted or controlled using inductive or magnetic detectors

Abstract

The present invention relates to a buried traffic information measuring device using a geomagnetic sensor, and in the present invention, a buried traffic information measuring device using a geomagnetic sensor using a geomagnetic sensor and buried in a road to measure traffic information, embedded in the road, A case having an accommodating space therein, and an upper portion having a case body having an open surface, a case containing a case cover detachably attached to the case body and covering the opening surface, and being accommodated in an accommodating space of the geomagnetic case, the upper part of the road A geomagnetism sensor unit for detecting a geomagnetism change caused by a vehicle passing through and transmitting the detected signal wirelessly; And a buried type traffic information measuring apparatus using a geomagnetic sensor, characterized in that it comprises a power supply for supplying power to the geomagnetic sensor.

Geomagnetic sensor, traffic information measuring device

Description

Landfill type traffic information measuring device using geomagnetic sensor {TRAFFIC MONITORING APPARATUS USING TERRESTRIAL MAGNETISM SENSOR}

The present invention relates to a buried traffic information measuring device using a geomagnetic sensor, and in particular, detects the earth's magnetic field distorted by a vehicle running on the road to detect traffic information on the road, such as traffic volume, vehicle presence, vehicle speed, occupancy, and vehicle type. In addition to providing a device that can be accurately identified, the concrete pavement and the asphalt pavement, which are rigid pavement, have little effect on the overlapping of the pavement and the repaving after cutting. A convenient embedded traffic information measuring apparatus.

In order to detect the information of the vehicle passing through the road, various vehicle detection devices such as loop detectors, image detectors, ultrasonic detectors, microwave detectors, and laser detectors have been used.

The loop detector is the most widely used detection device. It detects the occupancy of the vehicle by applying an oscillation signal to the roof coil embedded on the road surface and detecting a change in the magnetic field when there is a metallic object on the road surface. Loop detectors are more widely used as vehicle occupancy sensors because they are more vulnerable to cutting during road construction than ultrasonic and imaging methods. Loop detectors install one or a pair per lane and use oscillating waves of different frequencies to prevent errors caused by magnetic fields induced in adjacent loop coils. As mentioned above, the loop detector has been adopted in most cases in Korea because the detection information is more reliable and cheaper to install than other types of detectors, but the following disadvantages are pointed out.

-The loop detector is affected by the inductance change depending on the pavement of the road and the materials used. Therefore, there is a remarkable difference in performance depending on the absence of construction failure and the shape and size of the detector. That is, there are many cases where it is impossible to collect and collect erroneous data due to moisture or disconnection of the loop detector due to careless construction.

-It is necessary to control traffic flow during installation.

-Deterioration of detector performance due to road damage and deterioration of detector performance due to deformation of pavement. On-site installation is the most detectable method on the market, but no comprehensive verification has been done.

-In case of general national highways, the failure status of loop detectors is increasing by year, with 48 places in 1999, 49 places in 2000, 127 places in 2001, and 140 places in 2002. As the cause of the failure, the failure caused by road damage and disconnection is increasing very rapidly, and the suspension of operation due to the road pavement construction is also increasing.

-For highways, there is a cost for repairing damage and fault detectors once a year for one loop detector. It takes about 2 ~ 3 weeks from the service order of the roof detector to repair and the police consultation according to the selection of maintenance company and the road blockage.The damage and the failure of the loop detector are mostly caused by the lanes. For lanes where information is not collected, traffic information is provided by referring to the information of adjacent lanes.

-It is buried in the road surface, causing a breakdown over time such as damage by a vehicle or natural corrosion (approximately 2 years of endurance of the loop sensor if no loop break occurs).

-According to the internal data of the police unmanned enforcement equipment, the sensor breakdown occurs about twice a year, which is expected to be 20 ~ 30%.

As described above, the loop detector embeds the roof coil over a fairly wide ground, making installation and maintenance difficult, high frequency of breakage, and low speed vehicle detection. In particular, due to road changes in Korea, where asphalt is mostly asphalt, irregularities are generated due to temperature changes, and the breakage rate is high.

1 is a cross-sectional view of the asphalt structure, Figure 2 shows the plastic deformation and fatigue crack as a general damage type of asphalt pavement. Asphalt is composed of an AP surface layer 301, an AP interlayer 302, an AP base layer 303, and an auxiliary base layer 304. In the case of the loop detector which is used the most in Korea, it is generally installed on the asphalt surface layer 301 of FIG. 1 for a good response of the sensor, and a general package such as plastic deformation 311 and fatigue crack 312 of FIG. Due to the breakage of the loop detector, damage is easily caused by disconnection or the like.

The image sensor is a method of recognizing a distribution of pixel values of a region to be detected in advance and determining whether to enter a vehicle by changing pixel values when the vehicle enters. In case of Youngsam detector, there is a non-embedded type, and the application cases are increasing recently because of the relative merits of inconvenient installation work and difficulty in maintenance of buried type such as loop detector. In addition, unlike other detectors, there is an advantage that the administrator can check with the naked eye, so if the performance improvement such as resolution is supported, it is expected to be developed in the future. However, it is pointed out that the image detector analysis results are very sensitive to changes in climatic conditions and the environment, such as deterioration of discrimination performance due to sudden changes in the amount of light during rainy weather and sunset. In addition, the installation cost of one place is relatively very expensive.

Ultrasonic sensors are sensitive to climate and surrounding environment, and the detection area is conical, so there is no directivity. Microwave detectors are mainly used to obtain vehicle speed information, but they are expensive to install and require specialists for maintenance. Laser detectors require periodic maintenance for oscillator tuning, and expensive equipment to obtain accurate information.

In order to overcome this disadvantage, a traffic information collection system using a geomagnetic sensor has recently been developed. The conventional traffic information collection system using a geomagnetic sensor is an exposure type to attach and expose by using an adhesive such as epoxy on the road surface as shown in Figure 3, and embedded in the road 300 as shown in Figure 4 A buried type is proposed in which the geomagnetic sensor 305 is filled with a filler 303 such as asphalt. However, the exposed type has the disadvantage that the surface of the geomagnetic sensor breakage and attachment boundary road easily damaged or impacts the passing vehicle when passing through the vehicle. In the case of the buried type, even though the vehicle passes, it is not easily damaged by external force, but it is impossible to repair, replace or replace the geomagnetic sensor, and if the battery life is over, the geomagnetic sensor must be re-installed after unpacking the road. And an increase in administrative costs.

Since the present invention can be installed in the package only by circular drilling, the installation is simple by minimal traffic control, and reliable data measurement is possible regardless of the quality of the construction and the state of the packaging surface, and repair in case of system failure It is very easy to replace, and when the road repackage is required and the lane position is changed, the geomagnetic sensor case can be easily removed from the package, and the traffic information measuring device can be reused when repacking and changing lanes. It aims to provide.

In addition, even when overlaid on the pavement, it is possible to continuously operate the system only by installing the intermediate connection, and reusable road-filled traffic information that prevents the battery generated from the ground such as asphalt from being damaged by high geothermal heat after installation. It is to provide a measuring device.

Still another object of the present invention is to embed a piezo cable in a package even at an installation place such as a tunnel entrance / exit entrance where solar light cannot be used, and to detect the geomagnetic sensor by a voltage induced by the pressure applied to the piezo cable when the vehicle passes. An object of the present invention is to provide a road-mounted traffic information measuring device that can be driven.

An object of the present invention is a buried type traffic information measuring device using a geomagnetic sensor and embedded in a road to measure traffic information, which is embedded in the road, has a receiving space inside, and a case having an open surface at the top thereof. A geomagnetism case provided with a main body, a case cover detachably attached to the case main body, and covering the opening surface, and accommodated in an accommodation space of the geomagnetism case and detecting a change of geomagnetism caused by a vehicle passing through an upper part of the road, A buried type traffic information measuring apparatus using a geomagnetic sensor, characterized by comprising a geomagnetic sensor unit for wirelessly transmitting a signal and a power source unit for supplying power to the geomagnetic sensor unit.

The power supply unit is configured to include a solar cell and a storage battery accumulating power generated from the solar cell, and the case cover further includes a concave recessed surface, which accommodates the cell and is formed of a transparent material to protect the solar cell. In order to provide a transparent cover coupled to the case cover at the top of the cell.

Alternatively, the power supply unit may be configured to include a piezo cable embedded in a road near the geomagnetic case and a storage battery that accumulates power generated from the piezo cable.

The traffic information measuring apparatus of the present invention can be easily installed with minimal manpower and time input by fixing a protective case with a filler and then installing a geomagnetic sensor therein after circular drilling in the package.

In addition, the geomagnetic sensor protected by a solid case is always installed in a fixed position inside the case, so that it is possible to secure constant and reliable data at all times regardless of construction quality, and is a rigid case fixed in a small round hole of the package. Since the geomagnetic sensor is installed inside, there is an effect that damage such as disconnection of the sensor does not occur due to breakage of the package such as plastic deformation and fatigue cracking.

The geomagnetic sensor installed inside the case opens the cover to protect the case in case of a failure, and it is very easy to repair or replace the geomagnetic sensor, which enables quick system restart with minimal traffic control and convenient maintenance. Since there is a peeling layer between the case and the filler to fill the round hole, the geomagnetic sensor case can be easily removed from the package by lifting the case at any time, so that it can be reused when repacking and changing lanes. City has the advantage that the system can be operated continuously by installing the intermediate connection in the existing case.

By installing an insulation cover surrounding the battery, it is possible to prevent the battery generated from the ground such as asphalt from being damaged by high geothermal heat.

In addition, the traffic information measuring device of the present invention, when the entrance and exit of the tunnel or the solar light for energy acquisition is not secured, and it is difficult to supply sufficient power by the solar cell, the piezo cable is embedded in the package, the piezo when passing the vehicle Due to the voltage induced by the pressure applied to the cable, it is possible to provide a road-mounted traffic information measuring device capable of driving the geomagnetic sensor.

Hereinafter, the technical configuration of the present invention according to the accompanying drawings in detail.

5 is an embodiment of a buried traffic information measuring device using a geomagnetic sensor according to the present invention. A buried traffic information measuring device using a geomagnetic sensor has an inner accommodating space, a case body 202 embedded in a road having an opening on an upper surface thereof, a geomagnetic sensor unit and a battery 107 provided in the accommodating space, and A heat insulation cover 121 for insulating the geomagnetic sensor unit and the battery 107 from the outside, a case cover 206 having a recessed surface in the center and covering the opening, and a solar provided in the recessed surface The cell 109 includes a transparent cover 211 formed of a transparent material and coupled to the case cover. O-rings 204 and 209 are provided between the case body 202 and the case cover 206 and between the case cover 206 and the transparent cover 211 to seal the external space.

The geomagnetic sensor unit, as the geomagnetic sensor 101 and the circuit unit 105, is installed inside the case installed inside the circular hole formed in the package, so that the influence of foreign substances such as external stimuli and moisture, dust, etc. can be excluded. After removing the case cover fixing screw 207, by replacing the geomagnetic sensor unit integrally, it is possible to operate the system as quickly as possible with minimal traffic control. In addition, the case body 202 is fixed by a filler 251, such as cemented carbide, epoxy, polyurethane, and the case body fixing screw 205, and the case body 202 and the filler 251 are grease, If a thin peeling layer 252 such as vinyl or paper is provided and the case body 202 is to be removed, such as when repacking after cutting (cutting) the road, the case body fixing screw 205 is loosened and the case is removed. Lifting the main body 202 can be easily disassembled.

The geomagnetic sensor unit is composed of a geomagnetic sensor 101 and a circuit board (PCB) for mounting a circuit for operating the geomagnetic sensor 101, in the present invention is embedded in the road by forming a circuit board (PCB) in which the geomagnetic sensor 101 is mounted in a circular shape Construction was easy.

The heat insulation cover 121 is formed of a thermal insulation material such as styropole, and is used as a cover for minimizing the influence of the internal geomagnetic sensor unit and the battery from the external temperature or humidity change.

The battery 107 is used in a place where the amount of vehicle movement is not large, without using a solar cell or the like, and using a general battery that does not charge or discharge, so that the battery 107 may be replaced when the end of life is reached. It is preferable to use a storage battery capable of charging and discharging to accumulate energy generated through the piezo coil. Of course, in case of using a battery that can be charged and discharged in case of emergency, it is preferable to use a common battery together.

6 is an installation process diagram of an embodiment of a buried traffic information measuring device using the geomagnetic sensor of FIG. First, the cylindrical hole is formed in the road (FIG. 6A), and the case main body 202 is embedded. In this case, a temporary mounting table 400 is formed on the upper portion of the case body 202 to be supported by a cylindrical hole, and a release layer 252 such as grease is attached to the outside of the case body 202.

Next, as shown in FIG. 6 (b), the filler is injected through a gap formed between the injection hole 401 formed in the temporary holder 400 above the case body 202 or the asphalt and the temporary holder 400; To remove the temporary mounting bracket 400, the case is firmly fixed to the asphalt using the case body fixing screw 205 (Fig. 6c). The circuit board 105 and the battery 107 equipped with the geomagnetic sensor 101 are mounted in the case body 202, and the circuit board 105 and the battery 107 are wrapped with a heat insulating cover 121. In order to prevent malfunction caused by external temperature change.

Next, the O-ring 204 is installed in the jaw formed on the upper opening surface, and the case cover 206 is installed (FIG. 6D). The case cover 206 is detachably coupled with the case body 202 for maintenance of battery replacement, and the like. As shown in the drawing, the case cover 206 is screwed to the case body (using the screw screw 207). It may be coupled to the 202 or the case body 202 to form a screw groove and the case cover 206 to form a screw thread to be coupled while rotating the case cover 206. The method of coupling the case cover 206 and the case body 202 to be detachably attachable may be applied in addition to the two methods described above.

The case cover 206 is provided with a recessed surface, and the solar cell 109 is mounted on the recessed surface so as to be connected to the battery 107. Next, after the O-ring 209 is installed, the transparent cover 211 is combined with the case cover 206. By using the transparent cover 211, sunlight irradiated from the outside can reach the solar cell 109 so that the solar cell can be used as an energy support.

As described above, in the case of asphalt, the asphalt surface layer is often repackaged in order to maintain a good road surface condition. 7 shows that even when the asphalt surface layer 301 is repackaged, the buried traffic information measuring device using the geomagnetic sensor can be reused. When resurfacing the asphalt surface layer 301, the case cover that was previously installed is removed, and an auxiliary cover 550 is additionally installed on the case body 202. By sequentially installing the case cover 206 and the transparent cover 211 on the auxiliary cover 550, the existing geomagnetic sensor can be used as it is, even when resurfacing the asphalt surface layer.

8 is an embodiment of a buried traffic information measuring device using a geomagnetic sensor according to the present invention. The difference from the traffic information measuring apparatus shown in FIG. 5 will be described in detail. In FIG. 8, a piezo cable is used without using a solar cell as an energy source. Piezo cable 600 is embedded in the left and right sides of the case body 202, and the power generated when the vehicle passes over the piezo cable 600 is stored in the storage battery for use. The piezo cable 600 generates power and can be used as an axle sensor, so that more accurate traffic information can be identified.

FIG. 9 is a block diagram illustrating a supporter sensor unit and a power unit applied to the buried traffic information measuring apparatus of the present invention. The geomagnetic sensor unit 105 is a module that detects the occupancy or non-occupancy of the vehicle through the geomagnetic sensor and transmits it wirelessly. The geomagnetic sensor unit 105 includes a geomagnetic sensor, a sensor control circuit, a voltage amplifier, a wireless transmission / reception module, a microprocessor, and a flash memory. . The power supply unit is a module for supplying power to the geomagnetic sensor, and charges the power generated from the solar cell or piezo cable to the storage battery through the charging unit and then supplies it to the geomagnetic sensor.

The piezo cable is used as an axle detection sensor. When the piezo cable is powered by the weight of the vehicle (when pressure is detected), the voltage generated at that time is used for energy accumulation and axle detection signals. The charging unit includes a rectifier circuit for converting an AC signal generated from a piezo cable or a solar cell into a DC voltage, and a capacitor for smoothing it. A rechargeable battery is a rechargeable battery that functions to supply power to the geomagnetic sensor. In particular, if a piezo cable or solar cell fails, a separate generic battery (not charged) can be used to transmit data in an emergency.

The microprocessor controls the entire system, wakes up via input signals from the piezo cable, and drives / controls the geomagnetic sensor. The internal A / D converter is used to digitize the voltage signal from the occupied (magnetic) sensor, which is responsible for information processing such as vehicle presence and vehicle classification. In addition, the traffic information is temporarily stored in the flash memory, and a control signal is wirelessly transmitted to the receiver when necessary.

According to the present invention, there is provided a buried traffic information measuring device using two types of geomagnetic sensors: (1) a method of using a piezo cable as an axle sensor and a power source, and (2) a method of not using a piezo cable. In the piezo cable system, the microprocessor can be woken up by using the voltage generated by the piezo cable when the vehicle passes over the piezo cable. On the other hand, in the remaining method, a trigger circuit is separately provided between the geomagnetic sensor and the microprocessor, and the microprocessor can be woken up using the trigger signal generated therefrom. In this case, since the geomagnetic sensor and the voltage amplifier must be kept powered and operated at all times, power consumption is increased rather than using a piezo cable. In the present invention, a microprocessor having each terminal (two terminals in total) capable of receiving two interrupt signals generated from a piezo cable and a trigger can be easily applied to any method.

The wireless RF transceiver module is responsible for transmitting the acquired traffic information to the receiver. FLASH MEMORY is a storage medium that temporarily stores acquired traffic information. The flash memory is stored even when there is no power supply, and data storage such as when transmitting a signal directly from a microprocessor is not necessary or processed. If the amount of data is not large, it does not necessarily have to be provided.

The sensor control circuit is responsible for generating the control signals (Set / Reset, Offset) necessary to drive the geomagnetic sensor, and the set / reset signal aligns the magnetic material of the magnetization sensor in one direction to precisely change the change caused by the magnetic field. To be detected. The offset signal uses a bridge circuit to detect the change of the minute magnetization sensor, and serves to make the output voltage zero. The geomagnetic sensor is a sensor in which the earth's geomagnetic field changes when the vehicle moves, and the resistance changes by detecting the intensity of the geomagnetic field that changes. Honeywell's HMC105X IC was used as the sensor. The voltage amplifier is a device for amplifying the signal before converting the voltage into digital because the voltage output from the geomagnetic sensor is very small, a few mV.

Hereinafter, the operation of the circuit block diagram of FIG. 9 will be described.

1. When the power is turned on, the microprocessor goes to sleep mode (power save mode).

2. When the piezo cable is pressed by the vehicle, a voltage is generated, which charges the battery through the charging section and at the same time wakes up the microprocessor (operation mode).

3. The microprocessor drives the geomagnetic sensor through the sensor control circuit and amplifies the voltage signal from the sensor through the voltage amplifier.

4. The amplified signal is acquired as digital data through the A / D converter built in the microprocessor.

5. From the data thus obtained, information such as vehicle speed, occupancy rate and axle is extracted.

6. If necessary, the extracted data is stored in flash memory, and the data stored at regular intervals is transmitted to the receiver through the wireless RF transceiver module and then returned to SLEEP mode.

10 is an embodiment in which the embedded traffic information measuring apparatus of the present invention is installed on a road. In the reusable roadway-type traffic information measuring device of the present invention, as shown in Figure 10, by installing at least one location at a distance of L, a certain length, traffic such as traffic volume, vehicle presence, vehicle speed, vehicle occupancy, vehicle model classification Information can be collected.

As shown in FIG. 10, a road usually includes a center line 401 and a lane separation line 402. It is assumed that the vehicle runs from the bottom direction to the top direction of the drawing. Two geomagnetic sensor units 100 are installed at a predetermined distance from each lane, and the geomagnetic sensor unit 100 without piezo cables is installed in the first lane (lane close to the center line), and the geomagnetic field is installed in the second lane. At least one piezo cable 700 is installed on the side of the sensor unit 100.

The geomagnetic sensor unit 100 wirelessly transmits the vehicle information, and the signal processing unit 500 installed on the roadside receives the vehicle information from the geomagnetic sensor unit 100 wirelessly, and then performs necessary data processing to extract the information. After that, it is wirelessly transmitted to a camera (not shown) or a central control unit (not shown). The signal processor 500 includes a wireless receiver 510, a data processor 520, and a wireless transmitter 530.

In the case of the geomagnetic sensor unit 100 which is not provided with a piezo cable in one lane (a lane close to the center line), it is possible to classify a vehicle by occupying the vehicle, but it is impossible to grasp the axle and distinguish the vehicle by the exact axle. On the other hand, in the case of a geomagnetic sensor having a piezo cable provided in two lanes, not only energy generation by the piezo cable, but also information about the axle can be easily obtained, thereby providing more accurate traffic information.

The present invention described above is not limited to the above-described embodiments and drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be apparent to those who have

1 is an asphalt structure cross section.

Figure 2 shows the plastic deformation and fatigue crack as a general damage type of asphalt pavement.

3 is an external view of a conventional exposed geomagnetic sensor.

4 is an external view of a conventional buried geomagnetic sensor.

Figure 5 is an embodiment of a buried traffic information measuring device using a geomagnetic sensor according to the present invention.

6 is an installation process diagram of an embodiment of a buried traffic information measuring device using the geomagnetic sensor of FIG.

7 is an explanatory view showing that even when the asphalt surface layer is repackaged, the buried traffic information measuring device using the geomagnetic sensor can be reused.

8 is an embodiment of a buried traffic information measuring device using a geomagnetic sensor according to the present invention.

9 is a block diagram illustrating a supporter sensor unit and a power unit applied to the embedded traffic information measuring apparatus of the present invention.

10 is an embodiment in which the embedded traffic information measuring apparatus of the present invention is installed on a road.

Claims (4)

As a buried type traffic information measuring device using a geomagnetic sensor and embedded in the road to measure traffic information, A magneto-optical case embedded in the road, having a housing space therein and having a top portion having an open surface, and a case cover detachably attached to the case body and covering the open surface; A geomagnetic sensor unit which is accommodated in an accommodation space of the geomagnetic case and detects a change in the geomagnetism caused by the vehicle passing through an upper part of the road, and wirelessly transmits the detected signal; And A buried type traffic information measuring device using a geomagnetic sensor, characterized in that it comprises a power supply for supplying power to the geomagnetic sensor. The method of claim 1, The power supply unit is configured to include a solar cell and a storage battery for accumulating power generated from the solar cell. The case cover is further provided with a recessed recessed surface, the recessed surface is provided with the solar cell, the transparent cover is formed of a transparent material and coupled to the case cover on the top of the cell to protect the cell Landfill type traffic information measuring apparatus using a geomagnetic sensor, characterized in that it further comprises. The method of claim 1, The power supply unit embedded traffic information measuring device using a geomagnetic sensor, characterized in that it comprises a piezo cable embedded in the road near the geomagnetic case and a storage battery for accumulating the power generated from the piezo cable. The method according to any one of claims 1 to 3, The geomagnetic sensor unit is provided as a circuit board having a geomagnetic sensor, the circuit board is buried traffic information measuring device using a geomagnetic sensor, characterized in that formed in a circular shape.
KR1020070112504A 2007-11-06 2007-11-06 Traffic monitoring apparatus using terrestrial magnetism sensor KR20090046392A (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100988735B1 (en) * 2010-05-25 2010-10-20 주식회사 제이캐스트 Traffic surveillance detection system
KR101427736B1 (en) * 2012-10-15 2014-08-14 한국과학기술원 Wireless magnetic field communication module
KR101521696B1 (en) * 2013-04-11 2015-05-19 황규학 Undergrounding type sensor block for ITS road traffic infomation environment construction
KR101531034B1 (en) * 2013-08-16 2015-06-23 전자부품연구원 Vehicle detecting system using geomagnetism detector and piezo sensor
KR20190077796A (en) * 2017-12-26 2019-07-04 한국도로공사 Road safety warning system
KR20190077797A (en) * 2017-12-26 2019-07-04 한국도로공사 Road safety warning system
KR20190109678A (en) * 2018-03-16 2019-09-26 (주) 하나텍시스템 detecting device for vehicle
KR102238666B1 (en) * 2020-05-01 2021-04-09 (주)제이엔디 Parking detection device
CN115798223A (en) * 2022-10-12 2023-03-14 杭州立方控股股份有限公司 Multi-technology geomagnetic detector

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100988735B1 (en) * 2010-05-25 2010-10-20 주식회사 제이캐스트 Traffic surveillance detection system
KR101427736B1 (en) * 2012-10-15 2014-08-14 한국과학기술원 Wireless magnetic field communication module
KR101521696B1 (en) * 2013-04-11 2015-05-19 황규학 Undergrounding type sensor block for ITS road traffic infomation environment construction
KR101531034B1 (en) * 2013-08-16 2015-06-23 전자부품연구원 Vehicle detecting system using geomagnetism detector and piezo sensor
KR20190077796A (en) * 2017-12-26 2019-07-04 한국도로공사 Road safety warning system
KR20190077797A (en) * 2017-12-26 2019-07-04 한국도로공사 Road safety warning system
KR20190109678A (en) * 2018-03-16 2019-09-26 (주) 하나텍시스템 detecting device for vehicle
KR102238666B1 (en) * 2020-05-01 2021-04-09 (주)제이엔디 Parking detection device
CN115798223A (en) * 2022-10-12 2023-03-14 杭州立方控股股份有限公司 Multi-technology geomagnetic detector
CN115798223B (en) * 2022-10-12 2023-09-01 杭州立方控股股份有限公司 Multi-technology geomagnetic detector

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