KR20090106201A - System and method for managing the admittance to parking place based on geomagnetic sensor - Google Patents

Abstract

PURPOSE: A system and a method for managing the parking using a geomagnetic sensor are provided to manage the parking by transmitting the information to a network by sensing the change of the geomagnetic intensity. CONSTITUTION: A sensor node includes a sensor(100), a controller(110), and a wireless communication unit(120). The sensor includes the change of the geomagnetic intensity at a parking lot. The controller detects a vehicle based on the change of the geomagnetic intensity. The wireless communication unit transmits the detected result to an upper network.

Description

Parking management system using geomagnetic sensor and method thereof {System and method for managing the admittance to parking place based on geomagnetic sensor}

The present invention relates to a parking management system and a method thereof, and more particularly, to a parking management system and a method using a geomagnetic sensor.

A wireless sensor network is a network that senses recognition information about an object or surrounding environment information through a sensor and connects it to the outside to process and manage the information. Unlike the existing network, it is not a means of communication, but an automatic remote information collection, and it can be especially used for a parking management system.

A parking management system using a roof coil has been proposed. This parking management system is difficult to install and maintain because the roof coil must be buried in a large ground. In addition, there is a high risk of damage and it is difficult to accurately detect the vehicle.

Meanwhile, a parking management system using ultrasonic waves has been proposed. However, the ultrasonic waves in these systems are sensitive to the climate and the surrounding environment and can sense not only the vehicle but also other objects or people, so that the vehicle cannot be accurately sensed. Furthermore, there is a problem in that the installation of the ultrasonic sensor requires a separate structure is complicated and expensive.

The present invention proposes an accurate and efficient parking management system and method thereof.

That is, the present invention proposes a parking management system and method for managing parking accurately and efficiently by detecting a change in the magnitude of geomagnetic strength.

More specifically, the sensor node of the parking management system according to an aspect of the present invention, the sensing unit for detecting the size change of the geomagnetic intensity in the parking space, the control unit for detecting the vehicle based on the detected size change of the geomagnetic intensity and the detected It includes a wireless communication unit for transmitting the result to the upper network.

Meanwhile, a parking management system according to another aspect of the present invention collects vehicle information detected through at least one sensor node and at least one sensor node that detects a vehicle by detecting a magnitude change in geomagnetic intensity in a parking space, and manages a parking management server. It includes the base station to deliver to.

On the other hand, the parking management method of the sensor node according to another aspect of the present invention detects the size change of the geomagnetic intensity in the parking space, the step of detecting the vehicle based on the detected size change of the geomagnetic intensity and the difference of the detected result Transmitting to the network.

As described above, according to one embodiment of the present invention, an accurate and efficient parking management system and method are provided.

That is, the detection rate of the vehicle in the parking space can be improved by using the magnitude change of the geomagnetic strength. In addition, the detection rate can be increased by variably changing the polling time for detecting a change in the magnitude of geomagnetic intensity. In addition, parking control can be managed at low power by supplying power to each component of the sensor node according to the situation.

Furthermore, the sensor node of the parking management system according to an embodiment of the present invention is integrated with a sensing module and a wireless communication module for detecting a vehicle in a parking space, thereby making it easy to install and reduce cost. Furthermore, it can be installed safely and simply by embedding or attaching the sensor node to the ground.

Hereinafter, with reference to the accompanying drawings will be described embodiments of the present invention; In the following description of the present invention, if it is determined that detailed descriptions of related well-known functions or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to intention or custom of a user or an operator. Therefore, the definition should be made based on the contents throughout the specification.

1 is a reference diagram for explaining a parking management system 1 using a wireless sensor network according to an embodiment of the present invention.

Referring to FIG. 1, a parking management system 1 using a wireless sensor network includes a sensor node 10, a sink node 20, a base station 30, and a management server 40.

The parking management system 1 is a system that detects a vehicle leaving or entering a parking space, recognizes a detected vehicle, and manages or monitors parking using the same. In one embodiment of the present invention, the parking management system 1 uses a wireless sensor network. For example, when the sensor node 10 detects a vehicle in a parking space, wirelessly transmits the detected vehicle information to the base station 30 through a wireless sensor network, and the management server 40 transmits the vehicle information from the base station 30. You can manage or monitor the parking of the detected vehicle. In this case, the parking management system 1 may further include a sink node 20 which collects vehicle information detected through the sensor node 10 and relays the information to the base station 30.

On the other hand, the parking management system 1 according to an embodiment of the present invention uses the magnitude change of the geomagnetic strength for vehicle detection. That is, the change in the magnetic field of the earth according to the movement of the vehicle in the parking space uses the output voltage. The parking management system 1 using the magnitude change of the geomagnetic strength can detect the vehicle more accurately than when using the roof coil or the ultrasonic sensor, and the installation is simple and the installation cost can be reduced. Furthermore, it can be installed anywhere indoors or outdoors, so there is no limitation in the installation area.

Hereinafter, the configuration of the parking management system 1 of FIG. 1 will be described in detail with reference to FIGS. 2 and 3.

2 is a block diagram of the parking management system 1 using the change in the size of the geomagnetic strength according to an embodiment of the present invention.

Referring to FIG. 2, the parking management system 1 using the magnitude change of the geomagnetic intensity includes a sensor node 10, a sink node 20, a base station 30, and a management server 40.

The sensor node 10 is embedded in or attached to the parking space, and detects the vehicle by detecting a change in the magnitude of the geomagnetic strength in the parking space. There may be a plurality of sensor nodes 10. Furthermore, the sensor node 10 may vary a polling time for detecting a change in the magnitude of geomagnetic intensity. For example, if the sensor node 10 detects a change in the size of the magnetic field in the parking space, the sensor node 10 may detect the change in the magnitude of the geomagnetic intensity with a shorter polling time than the preset polling time. Accordingly, the sensor node 10 may improve the sensing detection rate. Meanwhile, an embodiment for improving the sensing detection rate of the sensor node 10 will be described later with reference to FIG. 4.

Furthermore, the sensor node 10 according to an embodiment of the present invention may variably supply power to each component of the sensor node 10 according to the sensed magnitude change of the geomagnetic intensity. For example, when the magnitude change of the detected geomagnetic intensity is less than or equal to a preset reference value, power may be cut off by supplying power to other modules other than the sensing module. In addition, if the magnitude change of the detected geomagnetic intensity is greater than or equal to the reference value, power consumption may be eliminated by supplying power to the blocked wireless communication module. Accordingly, parking can be managed at low power. Meanwhile, an embodiment of the low power implementation of the sensor node 10 will be described later with reference to FIG. 5.

Furthermore, the sensor node 10 may improve the accuracy of vehicle detection by correcting a base line that changes according to an environment or an offset unique to the geomagnetic sensor. This is because the sensing value output by detecting the magnitude change of the geomagnetic intensity is weak to the influence of the surrounding magnetic field, and may change depending on the measurement environment such as temperature, location, time, and season. The sensor node 10 according to an embodiment of the present invention may correct the baseline through a feedback circuit configuration using a variable reference signal change. However, this method is possible in various embodiments other than just one embodiment of the correction.

Furthermore, the sensor node 10 of the parking management system according to an embodiment of the present invention is convenient to install and reduce installation cost by integrating a sensing module and a wireless communication module for detecting a vehicle in a parking space. Furthermore, by installing or attaching the sensor node 10 in the parking space can be installed easily and safely.

The base station 30 collects vehicle information detected through the sensor node 10 and transmits the collected vehicle information to the management server 40. In this case, the sink node 20 may collect vehicle information detected through the sensor node 10 and relay the collected vehicle information to the base station 30.

The management server 50 may manage or monitor the vehicle in the parking space by using the vehicle information received from the base station 40. For example, illegally parked vehicles can be detected in real time and linked with the on-site action system. That is, the vehicle information of the detected vehicle can be collected and the related situation can be propagated to the management control room or coordinated with the government offices such as the ward offices of the jurisdiction to carry out on-site measures such as dispatching of the tow truck. As another example, a large parking lot can guide a user to find a space that can be parked quickly. However, this is only one embodiment of the parking management system 1 and various other embodiments are possible.

3 is a configuration diagram of a sensor node 10 of a parking management system according to an embodiment of the present invention.

Referring to FIG. 3, the sensor node 10 may include a sensing unit 100, a control unit 110, and a wireless communication unit 120, and further include a power supply unit 130.

The sensing unit 100 detects a change in the magnitude of geomagnetic intensity in the parking space. In this case, the sensing unit 100 may detect a change in the magnitude of the geomagnetic strength according to a preset polling time. In addition, when the magnitude change of the geomagnetic intensity is detected, the change in the magnitude of the geomagnetic intensity can be detected with a polling time shorter than the preset polling time. For example, if the detected sensing value is larger than the previously sensed sensing value, the controller 110 may determine that the vehicle has entered the parking space and sense a change in the magnitude of the geomagnetic intensity with a short polling time.

The controller 110 detects the vehicle based on the magnitude change of the geomagnetic intensity detected by the sensing unit 100. Herein, when the sensing value is different from the reference value, the sensing value may be recognized as entering or leaving the vehicle. Furthermore, the controller 110 controls the components of the sensor node 10. On the other hand, a detailed description of the vehicle detection method will be described later with reference to FIG. 7.

The wireless communication unit 120 transmits the result detected by the control unit 110 to a higher network. The upper network may include a base station or a sink node. In this case, the wireless communication may be performed within the same wireless communication module and the same wireless communication section of the wireless sensor network. Through such a single network configuration, the wireless communication unit 120 can simply and quickly transmit the vehicle information to the upper network.

Meanwhile, the power supply unit 130 variably supplies power to each component of the sensor node 10, for example, the sensing unit 100, the control unit 110, or the wireless communication unit 120. In detail, when the magnitude change of the geomagnetic intensity detected by the sensing unit 100 is less than or equal to a preset reference, power may be selectively supplied to the sensing unit 100 among the respective components, and the power supply may be cut off for the remaining components. Accordingly, power consumption can be minimized.

Furthermore, if the change in the magnitude of the geomagnetic strength detected by the sensing unit 100 is greater than or equal to a preset reference, it may be determined as a vehicle detection, and the vehicle information may be transmitted to a higher network by supplying power to the blocked wireless communication unit 120. have. Accordingly, vehicle information can be transmitted at low power.

Furthermore, power may be supplied to each component based on current time information. A detailed description thereof will be described later with reference to FIG. 8.

4 is a reference diagram for describing an implementation of improving sensing detection rate of a sensor node of a parking management system according to an exemplary embodiment of the present invention.

Referring to FIG. 4, the sensor node may vary a polling time for detecting a change in magnitude of geomagnetic intensity. For example, before sensing the magnitude change of geomagnetic intensity, as shown in FIG. 4, the sensing space is sensed in a parking space with a constant polling time of 1 second (1 s). The parking space can be sensed by time. This sensing method is a method of increasing the sensing detection rate of the vehicle according to the entry or exit of the vehicle in the parking space.

5 is a reference view for explaining a low power implementation of the sensor node of the parking management system according to an embodiment of the present invention.

Referring to FIG. 5, the sensor node may variably supply power to each component according to a situation. For example, when the magnitude change of the detected geomagnetic intensity is equal to or less than a predetermined reference, power is supplied to another module, for example, a wireless communication unit (120 of FIG. 3) by selectively supplying power to the sensing unit (100 of FIG. 3). The waste of power can be prevented.

On the other hand, in the situation where the magnitude change of the detected geomagnetic intensity is greater than or equal to a preset reference as shown in FIG. Can be transmitted to a higher network.

6 is a flowchart illustrating a parking management method of a sensor node of a parking management system according to an exemplary embodiment of the present invention.

Referring to FIG. 6, the sensor node of the parking management system detects a change in the magnitude of geomagnetic strength in the parking space (S100). Here, the magnitude change of the geomagnetic strength may be detected according to a preset polling time. Furthermore, if the magnitude change of the geomagnetic intensity is detected, the change in the magnitude of the geomagnetic intensity can be detected with a polling time shorter than the preset polling time. Accordingly, the sensing detection rate can be increased. Further, while sensing a vehicle in a parking space, power consumption can be minimized by cutting off power supply to another module, for example, a wireless communication module.

The vehicle is detected based on the detected change in the magnitude of the geomagnetic intensity (S110). Subsequently, the detected result is transmitted to the upper network (S120). In this case, power can be supplied to the wireless communication module from which the power supply is cut off, and the detected result can be transmitted through the wireless sensor network. In addition, the sensor node can transmit the detected result to the upper network and switch the wireless communication module to the dormant state to prevent power waste.

7 is a detailed flowchart illustrating a parking management method of the sensor node of FIG. 6 according to the present invention.

Referring to FIG. 7, the sensor node detects a change in size of geomagnetic intensity in a parking space (S200). Then, the magnitude change of the detected geomagnetic intensity is compared with the reference value (S210). Here, the reference value is a correction value correcting a baseline that changes according to an inherent offset of the environment or geomagnetic sensor. If the detected magnitude of the geomagnetic intensity is smaller than the reference value, the corresponding value is ignored and the size of the geomagnetic intensity is detected again in the parking space (S200). At this time, it is possible to detect a change in the magnitude of the geomagnetic strength according to a preset polling time.

However, if the detected magnitude of the geomagnetic intensity is larger or smaller than the threshold value (S210), it is determined whether to enter or leave the vehicle by recognizing the variation of the previous parking space state (S220). To this end, it is possible to detect a change in the magnitude of the geomagnetic intensity with a time shorter than the preset polling time. This is to increase the sensing detection rate of the geomagnetic sensor. In this case, the reference value may be corrected by a change in the baseline.

The detected result is transmitted to the upper network (S230). The sensor node repeats the sleep (S240) and wake-up (S250) in accordance with the polling period when polling for sensing, and the RF module supplies power when transmitting / exiting vehicle exit / exit information using a network. To achieve low power operation.

8 is a flowchart illustrating a parking management method of a sensor node of a parking management system according to another embodiment of the present invention.

Referring to FIG. 8, the sensor node may variably supply power to each component based on current time information. For this purpose, the sensor node has a built-in RTC circuit that can read the current time information. First, the sensor node detects the size change of the geomagnetic intensity in the parking space (S300). The current time information is checked using the RTC circuit (S310). At this time, it is determined whether the current time is included in a preset time, for example, from 06 o'clock to 24 o'clock (S320). As a result of the determination, when the current time is included in the preset time, the vehicle is detected based on the detected size change (S340). The vehicle detection method may use the vehicle detection method described above with reference to FIG. 7. Then, the detected result is transmitted to the upper network (S350). The sensor node is switched to the sleep mode (S360) to prevent power consumption. Thereafter, the sensing module of the sensor node may be woken up again and the above-described method may be repeated.

However, if the current time is not included within a preset time, for example, from 06 o'clock to 24 o'clock, the sensor node is switched to the sleep mode (S350). This allows the sensor node to be operated efficiently and at low power according to the operating time of the sensor node in a flexible manner depending on the amount of entry and exit of the vehicle or the environment or circumstances of the parking space. Thereafter, the sensing module of the sensor node may be woken up again and the above-described method may be repeated.

Meanwhile, the parking management system according to an embodiment of the present invention may be used in various parking spaces. For example, in the field of defense, it can be used to identify the information of the vehicle when entering and exiting the unit, and to monitor or manage the vehicle by identifying the parking facilities and the location of the unit. In a hospital or a large public parking lot, it may be used to identify vehicle location information or to secure a parking space for a vehicle. Accordingly, when an emergency occurs, the parking position of the vehicle may not be found, thereby preventing waste of time and enhancing customer convenience.

In addition, by allowing other vehicles to park in the parking spaces allocated only to residents, the economic disadvantages or complaints of residents can be dealt with through real-time parking information, which can improve residents' convenience and solve severe parking shortages.

In addition, the parking management system can efficiently manage the parking lot in a tower parking lot or an apartment parking lot with dense residential facilities. In addition, it is possible to minimize economic loss or inconvenience for residents by securing fire roads and restricting access of external vehicles.

In summary, as described above, the parking management system according to the embodiment of the present invention may improve the detection rate of the vehicle in the parking space by using the size change of the geomagnetic strength. Furthermore, the detection rate can be increased by varying the polling time for detecting the change in the magnitude of magnetic strength. In addition, parking control can be managed at low power by supplying power to each component of the sensor node according to the situation.

Furthermore, the sensor node of the parking management system according to an embodiment of the present invention is integrated with a sensor and a wireless communication module for detecting a vehicle in a parking space, thereby simplifying installation and reducing installation cost. Furthermore, the sensor node can be installed simply and safely in an embedded or attached form.

So far, the present invention has been described with reference to the embodiments. Those skilled in the art will appreciate that the present invention can be implemented in a modified form without departing from the essential features of the present invention. Therefore, the disclosed embodiments should be considered in descriptive sense only and not for purposes of limitation. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the scope will be construed as being included in the present invention.

1 is a reference diagram for explaining a parking management system using a wireless sensor network according to an embodiment of the present invention;

2 is a configuration diagram of a parking management system using a change in size of geomagnetic intensity according to an embodiment of the present invention;

3 is a configuration diagram of a sensor node of a parking management system according to an embodiment of the present invention;

4 is a reference view for explaining a sensing detection rate improvement implementation of the sensor node of the parking management system according to an embodiment of the present invention,

5 is a reference diagram for explaining a low power implementation of a sensor node of a parking management system according to an embodiment of the present invention;

6 is a flowchart illustrating a parking management method of a sensor node of a parking management system according to an embodiment of the present invention;

7 is a detailed flowchart illustrating a parking management method of the sensor node of FIG. 6 according to the present invention;

8 is a flowchart illustrating a parking management method of a sensor node of a parking management system according to another embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

1: Parking management system 10: Sensor node

20: sink node 30: base station

40: management server 100: sensing unit

110: control unit 120: wireless communication unit

130: power supply

Claims (18)

In the sensor node of the parking management system, Sensing unit for detecting a change in the size of the geomagnetic strength in the parking space; A controller for detecting a vehicle based on the sensed change in magnitude of the geomagnetic intensity; And Sensor node including a wireless communication unit for transmitting the detected result to the upper network. The method of claim 1, The sensing unit is a sensor node for varying the polling time for detecting a change in the magnitude of the geomagnetic intensity. The method of claim 2, The sensing unit senses a change in the magnitude of the geomagnetic intensity with a shorter polling time than a preset polling time if a change in the magnitude of the geomagnetic intensity is detected. The method of claim 1, And a power supply unit configured to variably supply power to at least one of each of the components according to the sensed magnitude change of the geomagnetic intensity. The method of claim 4, wherein And the power supply unit cuts off power supply to other components except for the sensing unit among the respective components when the magnitude change of the detected geomagnetic intensity is equal to or less than a preset reference. The method of claim 4, wherein And the power supply unit supplies power to the wireless communication unit when the vehicle is detected based on the sensed change in magnitude of the geomagnetic intensity. The method of claim 4, wherein And the power supply unit variably supplies power to the at least one component based on current time information when the current time corresponds to a preset time. In parking management system, At least one sensor node detecting a vehicle by detecting a change in magnitude of the geomagnetic strength in the parking space; And Parking management system comprising a base station for collecting the vehicle information detected through the at least one sensor node and delivers to the parking management server. The method of claim 8, The at least one sensor node is a parking management system for varying the polling time for detecting a change in the magnitude of the geomagnetic strength. The method of claim 9, The sensor node is a parking management system for detecting a change in the magnitude of the geomagnetic intensity with a shorter polling time than a preset polling time when the magnitude change of the geomagnetic intensity is detected. The method of claim 8, And the sensor node is variably supplied with power to at least one component of each component of the sensor node according to the sensed magnitude change of the geomagnetic intensity. The method of claim 8, The sensor node is embedded in the parking space or attached to the parking management system. The method of claim 8, Parking management system further comprises a sink node to collect the vehicle information detected through the sensor node and relay to the base station. In the parking management method of the sensor node of the parking management system, Detecting a change in the magnitude of geomagnetic intensity in the parking space; Detecting a vehicle based on the sensed magnitude change of the geomagnetic intensity; And Parking management method comprising the step of transmitting the detected result to the upper network. The method of claim 14, wherein said detecting is Parking management method for varying the polling time for detecting a change in the magnitude of the geomagnetic strength. The method of claim 15, wherein said detecting is And when the magnitude change of the geomagnetic intensity is detected, detecting a change in the magnitude of the geomagnetic intensity with a shorter polling time than a preset polling time. 15. The method of claim 14, wherein said transmitting is And when the vehicle is detected on the basis of the detected change in the magnitude of the geomagnetic intensity, transmitting the detected result to a higher network. The method of claim 14, And transmitting the sensor result to a sleep mode when the detected result is transmitted to a higher network.

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