KR20150019948A - Vehicle detecting system using geomagnetism detector and piezo sensor - Google Patents

Abstract

The present invention relates to a vehicle detection system using a geomagnetic detector and a piezoelectric sensor, which comprises: a sensor unit including one geomagnetic detector and first and second piezoelectric sensors which are installed on one lane; a gateway to receive a detection signal of the geomagnetic detector and detection signals of the first and second piezoelectric sensors; and a main server to receive an output of the gateway through remote wireless communications and provide traffic information to the outside through a web-based user interface, wherein one of the gateway and the main server calculates at least one information among the road share of a vehicle, the speed of the vehicle, the number of axles, the length of the vehicle, a length between axes, and the load of the moving vehicle, and the other calculates the remaining information.

Description

TECHNICAL FIELD The present invention relates to a vehicle detecting system using a geomagnetism detector and a piezo sensor,

The present invention relates to a vehicle detection system for collecting traffic situation information using a geomagnetism detector.

Generally, a vehicle detection system (VDS: Vehicle Detection System) is installed in various roads, highways, and other sensors to collect traffic information of each item such as traffic volume, driving speed, road occupancy, and vehicle length in real time Equipment.

This VDS is an essential equipment for building intelligent transportation system because it provides individual information about the passing vehicle and statistical information about passing vehicle by period in real time to the control center.

As a method of collecting traffic situation information through the VDS, there are a contact type method using a magnetic loop detector and a non-contact type method using an image sensor such as an image detector. Specifically, the contact-type method is a method of detecting a passing vehicle by inserting a sensor such as a loop coil on a road, and in a non-contact type method, an image sensor such as a camera is installed on a ground structure stand on the road, Method.

In the loop detection method using a loop coil, which is one of the contact type methods, the traveling speed of the vehicle is measured by the speed trap method using two magnetic loops. The loop detection method has a good detection sensitivity when the vehicle speed is high and the speed is low.

However, there are difficulties such as frequent construction of roads and maintenance of sensors due to road breakage, and it takes a long time to install, which can cause traffic congestion and traffic accidents. Also, the sensitivity of the loop detector can be influenced by the size of the loop, the length of the lead wire, the short-circuit resistance with the ground, and the thickness of the over-lay layer on the road. In addition, many loop coils and controllers use bus topology communication method. Bus type communication method is disadvantageous in that when the central cable is disconnected, the entire network is interrupted, the addition of new resources is difficult, and the management of each resource is difficult Have.

The video detection method is a non-contact method most commonly used. It sets a video detection area at a necessary position for each lane of a road while watching a video screen of a road photographed by a video camera on a video monitor, Is detected by the video image processor board. This board analyzes the gray level and the video image which are changed by the vehicle passing through the pixel area of the predetermined image loop by receiving one screen at the set time, detects the presence or absence of the passing vehicle, Length, and license plate information through the license plate.

However, in the video detection method, the detection error per pixel is about 4 to 5 meters, and since only the traffic information at the location where the image detector is installed is detected and processed, the basic parameter CVO (Count: , Occupancy: Occupancy). In addition, there is a serious disadvantage that accuracy varies depending on environmental changes such as weather, the shape of the moving object, the shadow, the state of the road surface, the difference between day and night, and the amount of sunshine.

In this way, it is required to develop a traffic situation information collecting system that complements the technical aspects of the loop detector and the image detector, the resource maintenance aspect, and construction shortcomings and does not have the greatest effect on the road traffic situation.

The present invention provides a geomagnetic sensor and a piezo sensor which collect traffic situation information and structural safety information by using a geomagnetic sensor and a piezo sensor, which are cost reduced than conventional loop detectors and overload sensors, And to provide a vehicle detection system using a sensor.

According to another aspect of the present invention, there is provided a vehicle detection system using a geomagnetism sensor and a piezo sensor. The vehicle detection system includes a sensor unit including one geomagnetism detector installed in one lane and first and second piezo sensors, a detection unit for detecting a detection signal of the geomagnetism detector and a detection signal of the first and second piezo sensors from the sensor unit, And a main server for receiving the output of the gateway via remote wireless communication and for providing traffic situation information to the outside via a web based user interface, Calculating road information, at least one of a road occupancy rate, a vehicle speed, a number of axles, a length of a vehicle, an inter-axis length, and a load of a moving vehicle, and calculating remaining information from the other, And the vehicle speed, the number of the axles, the length of the vehicle, The length of the vehicle is calculated using the sensing signals of the first and second piezo sensors, the vehicle type is discriminated by using the calculated number of axles, the length of the vehicle and the inter-shaft length, Sensitivity, the pressure applied to the piezo sensor, and the cross-sectional area of the piezo sensor, which are detected through at least one of the sensing signals of the first and second piezo sensors.

Wherein the first and second piezo sensors transmit a sensing signal to the gateway in a wired communication and the geomagnetic sensor transmits a sensing signal to the gateway by wire or wireless communication.

The geomagnetism detector includes a sensor module including the geomagnetism sensor, an AD converter for converting a sensing signal output from the geomagnetism sensor into a digital signal and outputting the digital signal, An external power supply unit connected to an external commercial power terminal through a wired connection to supply commercial power to the geomagnetism detector and to supply the commercial power to the geomagnetism detector; A battery for supplying power to the internal configuration of the geomagnetism detector, and a control unit for performing a control operation for each configuration.

The gateway calculates the road occupancy rate of the vehicle, the speed of the vehicle, the number of the axles, the length of the vehicle, the length between the axes, the load of the moving vehicle and provides the calculated information to the main server,

Wherein the main server receives a detection signal of the geomagnetism detector and a detection signal of the first and second piezo sensors from the gateway to calculate a road occupancy rate of the vehicle, a speed of the vehicle, a number of the axles, The inter-shaft length, and the load of the moving vehicle, and to determine the vehicle type.

According to the embodiment of the present invention, the detector module for recognizing the vehicle is made smaller than the conventional loop detector, thereby minimizing the road damage and also facilitating maintenance.

In addition, by using the piezo sensor and the geomagnetism detector together, it is possible to collect basic information such as the traffic volume, the traveling speed, the share, the car type, etc. without the support of the large detector such as the wim and the loop coil.

In addition, according to the embodiment of the present invention, the load of the moving vehicle can be predicted by analyzing the waveform and size of the signal extracted from the piezo sensor, so that the load information of the moving vehicle helps to maintain structure and safety.

1 is a block diagram of a vehicle detection system using a geomagnetism sensor and a piezo sensor according to an embodiment of the present invention.
2 is a block diagram of a geomagnetism detector according to an embodiment of the present invention.
FIG. 3 is an installation configuration diagram of a piezo sensor according to an embodiment of the present invention.
4 is a block diagram of a gateway according to an embodiment of the present invention.
5 is a block diagram of a main server according to an embodiment of the present invention.
FIG. 6 is a diagram showing an operation using a sensing signal in a vehicle detection system using a geomagnetism detector and a piezo sensor according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Now, a vehicle detection system using a geomagnetism detector and a piezo sensor according to an embodiment of the present invention will be described in detail with reference to the drawings.

1 is a block diagram of a vehicle detection system using a geomagnetism sensor and a piezo sensor according to an embodiment of the present invention. As shown in FIG. 1, a vehicle detection system using a geomagnetic sensor and a piezo sensor according to an embodiment of the present invention includes a sensor unit 100, a gateway 200, and a main server 300.

The sensor unit 100 comprises a plurality of unit sensor units (not shown), and one unit sensor unit is installed in one lane. Each of these unit sensor units includes two piezo sensors 101 and 102 and one geomagnetism sensor 103.

Piezoelectric sensors 101 and 102 are sensors having thin piezoelectric elements sandwiched between metal plates. They can detect sounds, vibrations, and pressures. Piezoelectric elements generate a voltage pulse when a pressure is applied. At this time, the number of axles, the distance between axes, and the like can be calculated by using the number of pulses generated in each of the piezo sensors 101 and 102 and the time information. Also, since the voltage pulse magnitude of the piezo sensor is proportional to the pressure of the axle, the load of the moving vehicle can be measured by analyzing the size and area of the generated pulse. Each of the piezo sensors 101 and 102 outputs the generated voltage pulse via a piezo communication line, that is, a wired communication line, and transmits the voltage pulse via RS-485 communication.

The geomagnetism detector 103 detects one change of the geomagnetic field generated when the vehicle passes through the buried point and transmits a detection signal to the gateway 200. [ At this time, the transmission to the gateway 200 transmits the sensing signal directly to the digital converted packet through the near field wireless communication or transmits the sensing signal through the wired communication line.

The wired communication between the geomagnetism detector 103 and the gateway 200 is, for example, DC-PLC (Direct Current-Power Line Communication) or RS-485 communication or RS232 communication. The wireless communication between the geomagnetism sensor 103 and the gateway 200 is, for example, near-field wireless communication such as IEEE 802.15.4 based Zigbee communication or Bluetooth communication.

If the signal transmission method of the geomagnetism detector 103 is used in a wireless manner, it is easy to install structures such as bridges and tunnels, which are difficult to construct a wired infrastructure, compared with conventional loops. And provides the effect of preventing traffic congestion caused by maintenance.

The first and second piezo sensors 101 and 102 and the supporter detector 103 collect and provide real time vehicle information about the vehicle that travels in the installed lane to the gateway 200.

The functions of the gateway 200 and the main server 300 may be varied by a designer as follows.

Variable 1: The gateway 200 performs a function of transmitting a sensing signal of a sensor from a main server, and the main server 300 generates all traffic situation information using a sensing signal.

Variable 2: The gateway 200 generates some traffic situation information using the detection signal, and the main server 300 generates some traffic situation information that is not generated by the gateway using the detection signal.

Variable 3: The gateway 200 generates all traffic situation information using a detection signal, and the main server 300 performs a function of collecting and managing traffic situation information from each gateway 200.

The traffic condition information includes the vehicle speed, the vehicle occupancy rate, the vehicle speed, the vehicle length, the distance between the vehicles, the vehicle type, and the load.

The gateway 200 receives the sensing signals from the sensor unit 100. That is, the gateway 200 receives the sensing signals of the piezo sensors 101 and 102 and the sensing signals of the geomagnetism sensor 103 from each of the plurality of unit sensor units. In the case of transmitting the traffic situation information, the gateway 200 processes at least one of the vehicle speed, the occupancy rate, the vehicle type, and the load and transmits it to the main server 300. In the case of generating traffic situation information, the gateway 200 has a DBMS (Database Management System) and stores the generated traffic situation information in the DBMS.

The main server 300 receives detection signals from the plurality of gateways 300 or receives sensing signals and traffic situation information. When receiving the detection signal, the main server 300 generates traffic condition information such as a vehicle speed, a vehicle occupancy rate, a vehicle speed, a vehicle length, an inter-axis distance, a vehicle type, and a load using a detection signal. On the other hand, when receiving the detection signal and the traffic situation information from the gateway 200, the main server 300 generates traffic situation information that is not generated by the gateway 200. [ The main server 300 includes a database management system (DBMS) for storing traffic information, and displays traffic information through a web-based user interface. The main server 300 communicates with a plurality of gateways using broadband wired / wireless communication such as Wibro, LTE, and Ethernet.

Hereinafter, a geomagnetism sensor 103 according to an embodiment of the present invention will be described with reference to FIG. 2 is a block diagram of a geomagnetism detector according to an embodiment of the present invention.

2, the geomagnetism detector 103 according to the embodiment of the present invention includes a sensor module 10, an AD converter 11, a battery 14, an external power source 15, and a controller 16 And includes at least one of a wired communication unit 12 and a wireless communication unit 13 for communication with the gateway 200.

The sensor module 10 includes various sensors such as a geomagnetism sensor 10a and a temperature sensor 10b, and each sensor outputs a sensed signal to the A / D converter 11. Hereinafter, the geomagnetic sensor 10a among the sensors included in the sensor module 10 will be described.

The geomagnetic sensor 10a continuously measures the variation value of the current magnetic field and recognizes the magnetic field value that fluctuates when the vehicle enters the detection area, and outputs the variation value of the magnetic field.

The AD conversion unit 11 converts the signal output from the geomagnetic sensor 10a of the sensor module 10 into a digital signal and outputs the digital signal

The wired communication unit 12 transmits the digital output of the geomagnetism sensor 10a output from the AD conversion unit 11 to the gateway 200 using one of the DC-PLC, RS-485 and RS232 wired communication methods. The data is transmitted by RS-485, and the transmitted data is converted into RS232 and processed and processed by the gateway 200. [

The wireless communication unit 13 wirelessly transmits the digital output of the geomagnetism sensor 10a output from the AD conversion unit 11 to the gateway 200 using one of the short-range wireless communication methods such as Zigbee communication, Bluetooth communication, or infrared communication Function.

The battery 14 operates when the supply of external power is cut off and supplies power to each configuration. The external power supply unit 15 is connected to an external commercial power supply terminal by wire to supply commercial power and supply power to each configuration.

The control unit 16 causes the AD conversion unit 11 to output a digital signal to the wireless communication unit 13 (or the wired communication unit), and when the power supply from the external power supply unit 15 is interrupted, To be supplied to each configuration.

FIG. 3 is an installation configuration diagram of a piezo sensor according to an embodiment of the present invention.

Each of the piezo sensors 101 and 102 has a ceramic type and a film type, and when the vehicle passes, a pressure is applied and a voltage pulse is generated. The piezo sensors 101 and 102, like the geomagnetism detector, place a hole in the lane by inserting a sensor, and the hole is covered with a product such as epoxy or acrylic. The output signals of the piezo sensors 101 and 102 are transmitted by RS-485, and the transmitted data is converted into RS232 and processed and processed by the gateway 200. [

4 is a block diagram of a gateway according to an embodiment of the present invention, in which traffic situation information is generated. 4, the gateway 200 includes a sensor communication interface unit 210, a signal conversion unit 220, a time information matching unit 230, a storage unit 240, a traffic information generation unit 250, And a wide area communication interface unit 260.

The sensor communication interface unit 210 provides a communication interface between the geomagnetism sensor 103 and the first and second piezo sensors 101 and 102 so that the geomagnetism detector 103 and the first and second piezo sensors 101 and 102 As shown in Fig.

The sensor communication interface unit 210 provides a wired communication interface with the first and second piezo sensors 101 and 102 and provides a near field wireless communication or a wired communication interface with the geomagnetism detector 103. At this time, the interface with the geomagnetism detector 103 is designed to provide a wired communication interface when the geomagnetism sensor 103 transmits data to the wired communication, and to provide a wireless local communication interface when transmitting data to the wireless local area communication.

The signal converting unit 220 converts the output of the geomagnetism detector 103 and the outputs of the first and second piezo sensors 101 and 102 received from the sensor communication interface unit 210 into digital signals.

The time information matching unit 230 matches the time value (i.e., the reception time value) of the sensing signal to the digital signal of each sensing signal converted by the signal converting unit 220 and stores it in the storing unit 240 And stores the traffic information generated by the traffic information generating unit 250 in the storage unit 240 by matching the reception time value with the traffic information generated by the traffic information generating unit 250.

The traffic information generation unit 250 generates traffic situation information using the digital signals of the sensing signals received from the signal conversion unit 220. The traffic condition information generated at this time is at least one of a vehicle speed, a vehicle occupation rate, a vehicle speed, a vehicle length, an inter-axis distance, a vehicle type, and a load.

The wide area communication interface unit 260 provides a remote communication interface for data communication with the main server 300. The interfaces include Wi-Fi, Ethernet, and Long Term Evolution (LTE).

5 is a block diagram of a main server according to an embodiment of the present invention. 5, the main server 300 according to the embodiment of the present invention includes a receiving unit 310, an information generating unit 320, a statistical analyzing unit 330, a DBMS 340, and a web server unit 350 ).

The reception unit 310 receives data transmitted from the gateway 200, and the information generation unit 320 generates traffic situation information using the received data. The statistical analysis unit 330 performs statistical analysis such as normal distribution and correlation analysis using the traffic situation information stored in the DBMS 340. The statistical analysis unit 330 analyzes various forecasting services such as abnormality of detection equipment, Road failure information, etc.).

The web server unit 350 transmits and receives data to and from an external device over the Internet, and provides various information to an external device based on the Internet.

FIG. 6 is a diagram showing an operation using a sensing signal in a vehicle detection system using a geomagnetism detector and a piezo sensor according to an embodiment of the present invention.

5 (a), the first and second piezo sensors 101 and 102 and the geomagnetism sensor 103 are arranged in the vehicle moving direction (vehicle traveling direction) with respect to one lane, The geomagnetism detector 103, and the second piezo sensor 102 in this order.

When the vehicle passes the lane in which the first and second piezo sensors 101 and 102 and the geomagnetism sensor 103 are installed in this state, as shown in Fig. 5 (b), the rope detector 103, And the second piezo sensors 101 and 102 output a signal for sensing the vehicle to the gateway 200, respectively. At this time, the first and second piezo sensors 101 and 102 output a pulse signal when the pressure by the vehicle is sensed, and the geomagnetism sensor 103 outputs a detection signal corresponding to the change of the geomagnetic field caused by the vehicle.

The process of calculating various traffic situation information using the detection signals of the fingerprint sensor 103 and the first and second piezo sensors 101 and 102 shown in FIG. 6 will be described.

(Road share)

The road occupancy rate is calculated using the detection signal of the geomagnetism detector 103. [ As shown in FIG. 6, the geomagnetism sensor 103 detects a vehicle entering the vehicle, detects a transition from the idle state to a detection state, and outputs a detection signal that transitions from the detection state to the stop state when the vehicle passes the vehicle do.

The time? T2 from the time point T1 at which the vehicle enters the vehicle to the time T2 at which the vehicle departs from the detection signal waveform of the geomagnetism sensor 103 is the vehicle occupation time.

And the road occupancy rate is the sum of the occupied road occupied times per unit time as a percentage. Therefore, the road occupancy rate is calculated by adding the measured occupancy time of the road by the set unit time, and expressing it as a percentage.

Through this, it is possible to know the number of vehicles, and the vehicle flow of the straight lane left turn and the right turn lane.

(Vehicle speed)

The vehicle speed (vehicle speed) is measured through the sensing signal waveforms of the first and second piezo sensors 101, 102. Since the first and second piezo sensors 101 and 102 have already been set at the installation interval D, therefore, the time at which the vehicle moves between the first and second piezo sensors 101 and 102, The vehicle speed is calculated by dividing the difference (DELTA t1) of the time when the voltage pulses of the sensors 101, 102 are generated by the installation interval D.

(Vehicle length)

The length L of the vehicle shown in Fig. 6 is calculated by multiplying the time required for the vehicle to pass through the geomagnetism detection region of the vehicle at the vehicle speed V, that is, the vehicle occupancy time? T2. That is, the vehicle length is calculated by the following equation (2).

(Number of axles)

The number of axles is calculated by counting the number of pulses generated when the vehicle passes by the first and second piezo sensors 101 and 102 and obtaining an average value therefrom. 6, since the number of pulses generated by the first and second piezo sensors 101 and 102 is two, the number of axles is two.

(Distance between axes)

Since the inter-shaft distance AL means the distance from the center of the front wheel axle to the center of the rear axle, the time difference? T3,? T4 of the pulse generated by the first and second piezo sensors 101, You multiply your movement speed. In the case where the number of axes is k and the number of pulses is n, the average value is calculated by calculating the inter-axis distance for each case as shown in the following Equation (3).

(Classification of vehicles)

When the distance between the axes of the vehicle detected by the sensor unit 100, the number of axles, the length of the vehicle, and the like are calculated, the gateway 200 or the main server 300 calculates the distance between the axes of the vehicle, The length of the vehicle is applied to eleven vehicle classification tables described in the "traffic volume information providing system" to determine the vehicle type. Of course, the gateway 200 or the main server 300 stores information on the eleven vehicle classifications provided by the "traffic volume information providing system " itself.

 The gateway generates the signal as shown in Fig. 6, and the gateway reads each sensor signal simultaneously by a sampling clock (Clock), and processes the time information of each signal in real time. And transmits it to the main server so that information necessary for traffic information collection and management can be extracted and processed.

(Load of moving vehicle)

The load of the moving vehicle, that is, the load on the vehicle that communicates with the sensor unit 100, is calculated using the sensing signal of at least one of the first and second piezo sensors 101 and 102.

First, the voltage (V) output from the piezo sensor is calculated using the equation V = Sv x P x D. Where V is the voltage value of the piezo sensor, Sv is the signal sensitivity of the piezo sensor (Volt * meters / Newton), P is the pressure (N / m ^ 2) applied to the piezo sensor, D is the cross- (Meters). D is the value already known when installing the piezo sensor.

Using the above equation, the pressure applied to the piezo sensor is calculated, and the weight of the vehicle is measured using the force per unit area defined in the obtained pressure.

For example, assuming that 1N (Newton) = 1 / 9.8 = 0.10204 (kgf), the cross section is D (m ^ 2) ^ 2) = P (N) * D = {P / 9.8} * D (kgf).

Accordingly, by using at least one piezo sensor of the first and second piezo sensors 101 and 102, the voltage V of the piezo sensor, the sensitivity of the piezo sensor, the pressure applied to the piezo sensor, and the cross- The load of the moving vehicle can be calculated. If the sensing signals of both the first and second piezo sensors 101 and 102 are used, the average voltage V of the first and second piezo sensors 101 and 102, the average sensitivity of the first and second piezo sensors 101 and 102, The average pressure applied to the first and second piezo sensors 101 and 102, and the average cross-sectional area of the first and second piezo sensors.

The embodiments of the present invention described above are not only implemented by the apparatus and method but may be implemented through a program for realizing the function corresponding to the configuration of the embodiment of the present invention or a recording medium on which the program is recorded, The embodiments can be easily implemented by those skilled in the art from the description of the embodiments described above.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

100: sensor unit 101, 102: piezo sensor
103: Geomagnetic Sensor 200: Gate Way
300: main server
10: Sensor module 10a: Geomagnetic sensor
11: AD conversion unit 12: wired communication unit
13: wireless communication unit 14: battery
15: external power supply unit 16:
210: Sensor communication interface unit 220: Signal conversion unit
230: Time information matching unit 240:
250: traffic information generating unit 260: wide-area communication interface unit
310: Receiving unit 320: Information generating unit
330: Statistical Analysis Unit 340: DBMS
350: Web server unit

Claims (5)

A sensor unit including one geomagnetism detector installed in one lane, first and second piezo sensors,
A gateway for receiving a sensing signal of the geomagnetism detector and a sensing signal of the first and second piezo sensors from the sensor unit,
And a main server for receiving the output of the gateway through remote wireless communication and providing traffic situation information to the outside via a web based user interface,
Calculating at least one of a road occupancy rate of the vehicle, a speed of the vehicle, a number of axles, a length of the vehicle, an inter-axis length, and a load of the moving vehicle at one of the gateway and the main server, However,
Wherein the velocity of the vehicle, the number of the axles, the length of the vehicle, and the inter-axis length are calculated using the sensing signals of the first and second piezo sensors Respectively,
The vehicle type is determined using the calculated number of axles, the length of the vehicle, and the inter-shaft length,
Wherein the load of the moving vehicle is calculated by using an output voltage, sensitivity, pressure applied to the piezo sensor, and cross-sectional area of the piezo sensor, which are detected through at least one of the sensing signals of the first and second piezo sensors, Vehicle Detection System Using Sensor. The method of claim 1,
Wherein the first and second piezo sensors transmit a sensing signal to the gateway by wired communication and the geomagnetism sensor transmits a sensing signal to the gateway by wire communication or wireless communication. Vehicle detection system. 3. The method according to claim 1 or 2,
The geomagnetism detector
A sensor module including the geomagnetic sensor,
An AD converter for converting a detection signal output from the geomagnetic sensor into a digital signal and outputting the digital signal,
A communication unit for wiredly or wirelessly transmitting the digital sensing signal output from the AD conversion unit to the gateway,
An external power supply unit connected to an external commercial power terminal through a wire to supply commercial power and to provide the commercial power to the internal configuration of the geomagnetism probe,
A battery for supplying power to the internal configuration of the geomagnetism detector when the supply of the commercial power is interrupted,
And a controller for performing a control operation for each configuration. The system for detecting a vehicle using a geomagnetism sensor and a piezo sensor. 4. The method of claim 3,
The gateway
Wherein the control unit calculates the road occupancy rate of the vehicle, the speed of the vehicle, the number of the axles, the length of the vehicle, the interaxial length, and the load of the vehicle under travel, and provides the calculated information to the main server Vehicle Detection System Using Sensor and Piezo Sensor. 4. The method of claim 3,
The main server
And a controller for receiving the sensing signal of the geomagnetism detector and the sensing signals of the first and second piezo sensors from the gateway to calculate the road occupancy rate of the vehicle, the speed of the vehicle, the number of axles, the length of the vehicle, And calculating a load of the moving vehicle and determining the vehicle type. The system for detecting a vehicle using the geomagnetism sensor and the piezo sensor.

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