KR20060094276A - System for guiding parking space and method for guiding parking space using the system - Google Patents

Abstract

The present invention discloses a parking space guidance system for displaying whether there is a parking space in a parking lot by using an ultrasonic signal transmission time and reception time by transmitting and receiving an ultrasonic signal, and a parking space guidance method using the system. The parking space guidance system according to the present invention comprises a central control unit, a plurality of local controllers connected to the central control unit via a network, and parking detection display means connected to each of the local controllers and disposed one by one in each parking space. In addition, the parking space guidance method according to the present invention, the process of setting the identification number of the local controller and sensor, the process of calculating the interference avoidance distance of the sensor according to the parking structure, and each parking according to the individual designation method or group designation method The sensing display means includes a process of detecting and displaying a parked vehicle and a process of displaying a parking situation on the central control unit. Accordingly, the present invention can avoid the interference between the sensors in the process of detecting the presence of the car in the parking space by the ultrasonic signal, it is necessary to integrate the sensor and the parking availability indicator light, a separate connection between the sensor and the indicator light The installation method is simple and the cost can be reduced, and the installation line can be simplified by integrating the power line and the communication line.

Parking, Ultrasonic, Interference, Sensor, Controller, Indicator, Identification Number, Parking Space Guide

Description

Parking space guidance system and parking space guidance method using the same {SYSTEM FOR GUIDING PARKING SPACE AND METHOD FOR GUIDING PARKING SPACE USING THE SYSTEM}

1 is a block diagram of a parking space guidance system according to the present invention.

2 is a block diagram of a central control unit according to the present invention.

3 is a block diagram of a local controller according to the present invention.

4 is a block diagram of a parking detection display means according to the present invention.

5A and 5B are flowcharts illustrating a process of internally setting a parking space system according to the parking space guidance method of the present invention.

6 is a flowchart illustrating a process of detecting and displaying a parking space by an individual designation method.

7 is a flowchart illustrating a process of detecting and displaying a parking space by a group designation method.

♣ Explanation of symbols for main parts of drawing ♣

10: central control unit 11: controller network

12: input unit 13: central power unit

14: display unit 16: arithmetic processing unit

18: Central communication unit 20: Local controller

21: Combined communication power line 22: Upper communication unit

23: power supply unit 24: lower communication unit

26: controller microcom 27: controller memory

30: parking detection display means 31: sensor power supply

32: sensor communication unit 33: sensor microcomputer

34: sensor memory 35: A / D converter

36: sensor transmitter 37: sensor receiver

38a: rectifier 38b: constant voltage supply

39: parking available indicator 40: connection amplifier

The present invention relates to a parking space guidance system for displaying whether a parking space is present in a parking lot and a parking space guidance method using the system. In particular, the present invention relates to a parking space in a parking lot by using an ultrasonic signal transmission time and a reception time. The present invention relates to a parking space guidance system for indicating whether there is a parking space guidance method using the system.

In recent years, a large number of people have used cars to shuttle to theaters, department stores and discount marts. In addition, people who commute to work are increasingly returning by car, and large parking lots are installed on the ground or basement floors of department stores, discount marts, company buildings, theaters and restaurants.

Currently, most large parking lots are guided by parking guides. Since large parking lots have a very large area, the number of parking guides must be quite large to understand the parking situation of the entire parking lot. In addition, parking personnel must stay in the parking spaces of certain areas and continuously notify the control room of the parking situation.

Parking space confirmation by the parking guide agent not only increases the labor cost burden of the guide agent, but also has a problem that it is difficult to accurately describe a certain parking space in the area of the large parking lot. In addition, there is a problem that the information visually observed from a long distance may be inaccurate when the parking guidance agent guides a relatively large area in order to reduce the labor cost burden.

In order to overcome the problems of parking guidance by the parking guidance agent, a parking management system that can identify the parking space has been developed. The conventional parking management system is configured in such a way that the sensor is installed in the parking space to inspect the situation in which the vehicle is parked. In addition, the conventional parking management system classifies the sensor to determine whether there is a car in the parking space and the indicator indicating whether parking is possible and installs the sensor and the indicator, respectively. In addition, the conventional parking management system separately installs the power line to the sensor and the communication line between the central situation room and the sensor.

The above-described conventional parking management system has a problem in that interference between adjacent sensors is inevitable when operating a sensor for determining whether a vehicle is in a parking space. In addition, in the conventional parking management system, not only the sensor and the indicator must be separately installed, but also the power line and the communication line connected to the sensor and the indicator must be separately installed. Not only does it take a lot of time, but too many arrangements of devices and lines have made installation difficult. Recently, in order to avoid interference between sensors, a device for minimizing the dispersion angle of ultrasonic signals detected while being as close as possible to a vehicle has been developed, but such a device has a problem that the cost is too expensive.

Accordingly, the present invention has been made to solve the above problems, an object of the present invention is a parking space guidance system and parking space guidance using the same to avoid interference between the sensors in the process of detecting whether there is a car in the parking space To provide a method.

Another object of the present invention is a parking space guidance system and a parking space guidance method using the same, the installation method is simple and the cost is reduced because there is no need to make a separate connection between the sensor and the indicator light by integrating the sensor and parking availability indicators. It is to offer.

Still another object of the present invention is to provide a parking space guidance system and a parking space guidance method using the same, which makes it possible to quickly approach a parking space by lighting the 360 ° omnidirectional light so that the parking available light can be seen at any position. Is in.

Still another object of the present invention is to provide a parking space guidance system and a parking space guidance method using the same, which can reduce power by reducing the number of installation lines as well as simplify the installation lines by integrating a power line and a communication line. It is in doing it.

The above objects, advantages, and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments described with reference to the accompanying drawings, but the accompanying drawings are intended to clearly describe the present invention. The protection scope of the present invention is not limited to the configuration shown in the drawings.

As a feature of the present invention for achieving the object of the present invention, the parking space guidance system according to the present invention is a central control unit having a central communication unit, the upper communication unit connected to the network and the central communication unit, the upper communication unit and the communication signal A plurality of local controllers each having a lower communication unit connected to transmit / receive, a controller microcom for controlling the upper communication unit and a lower communication unit, and a power supply unit for supplying power, and a combined communication power line connected to the lower communication unit and the power supply unit Sensor communication unit for transmitting and receiving communication signals with the lower communication unit via the sensor, a sensor power unit that receives power from the power supply unit via the communication power supply line, a sensor transmitter for generating and radiating ultrasonic signals, and detects the reflected signal of the emitted ultrasonic signal Sensor receiving unit, parking available indicator to display whether the parking, A plurality of parkings, each of which has a sensor microcomputer for controlling whether the parking is possible by controlling the sensor communication unit, the sensor transmitter, the sensor receiver, and the parking indicator, and calculating the interval between the time when the ultrasonic signal is emitted and the time when the ultrasonic signal is detected. And sensing display means.

As another feature of the present invention, the parking space guidance method according to the present invention comprises the steps of setting the controller identification number of the local controller and the sensor identification number of the parking detection display means, the central control unit receives the parking lot structure data Calculating the ultrasonic interference avoidance distance according to the structure, setting the individual operation order of the parking detection display means through which the interference is avoided through the interference avoidance distance calculated by the central controller, and calculating the interference avoidance distance calculated by the central controller. Setting the group number by dividing the parking detection display means by which the interference is avoided by the group, receiving the key input of the detection method from the input unit by the central controller, and when the detection method received the key input is the individual designation method, The control unit transmits an individual designation execution command signal to the local controller, and the individual operation sequence in which the local controller is set. Transmitting the detection display command signal to the parking detection display means, and determining whether the vehicle is present by calculating the difference between the transmission time and the reception time of the ultrasonic signal by transmitting and receiving the ultrasonic signal. , The parking available indicator turns off when there is a vehicle parked in the parking space where the parking detection display means is installed, and lights up when there is no parked vehicle, and the parking detection display means transmits the content of the vehicle to the local controller. And the local controller transmits the parking status to the central controller so that the display section of the central controller displays the current parking status.

Hereinafter, an embodiment of a parking space guidance system and a parking space guidance method using the same according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a parking space guidance system according to the present invention. As shown in FIG. 1, the central controller 10 is connected to the plurality of local controllers 20 by the controller network 11. Each of the plurality of local controllers 20 is connected to a plurality of parking detection indicators 30 through a communication power supply line 21. Each of the plurality of parking detection display means 30 is provided one by one in the parking space. Preferably, the communication power supply line 21 further includes a connection amplifier 40 for amplifying the signal from the parking detection display means 30.

The plurality of local controllers 20 uses a communication scheme mainly used in local area communication such as a local area network or RS485 in the central control panel 10. For local area network or RS485 communication, the upper protocol of the protocol of the plurality of local controllers 20 and the protocol of the central control panel 10 should be the same. In case of using RS485 communication, one signal is transmitted by using two signal lines. In addition, RS485 communication is a two-wire line connected to both ends of the central control panel 10 and the local controller 20, the other side receives when one transmits. That is, in the case of RS485 communication, half duplex communication is performed.

Each of the plurality of local controllers 20 is connected in parallel to the communication power supply line 21 to the plurality of parking detection display means 30. According to the exemplary embodiment of the present invention, since each of the plurality of local controllers 20 is performed by the non-polarity power supply / communication communication method to the plurality of parking detection display means 30, the power supply line and the communication line are installed together in one line. Supply and communication can be performed.

2 is a block diagram of a central control unit according to the present invention. As shown in FIG. 2, the central control unit 10 includes an input unit 12, a central power supply unit 13, a display unit 14, an arithmetic processing unit 16, and a central communication unit 18. The input unit 12 is composed of a general input device such as a keyboard and a mouse. According to the exemplary embodiment of the present invention, the touch pad may be configured on the screen of the monitor so that input and output may be performed only by the monitor itself which is the display unit 14.

The central power supply unit 13 supplies power to the display unit 14, the calculation processing unit 16, and the central communication unit 18. The display unit 14 updates the parking situation or the operation state of the device and displays it on the screen. The arithmetic processing unit 16 is a central processing unit that performs arithmetic processing such as receiving the drawing data of the parking space and calculating the interference possible distance. The central communication unit 18 is connected to the plurality of local controllers 20 via the controller network 11 to transmit an indication signal to the local controller 20, or each of the parking sensing display means (from the plurality of local controllers 20). 30) to receive a detection signal and the like.

3 is a block diagram of a local controller according to the present invention. As shown in FIG. 3, the local controller 20 includes an upper communication unit 22, a power supply unit 23, a lower communication unit 24, a controller microcom 26, and a controller memory 27. The upper communication unit 22 of the local controller 20 has the same protocol as that of the central communication unit 18 of the central control unit 10. The upper communication unit 22 of the local controller 20 includes a communication device compatible with a local area network or RS485 according to the communication method of the central communication unit 18. The upper communication unit 22 receives the instruction signal from the central control unit 10 and transmits it to the controller microcomputer 26 or transmits the parking detection signal from the parking detection display means 30 to the central control unit 10.

The power supply unit 23 supplies power to the upper communication unit 22, the lower communication unit 24, and the controller microcom 26 of the local controller 20. In addition, the power supply unit 23 also supplies power to the parking detection display means 30 via the communication power supply line 21. The lower communication unit 24 transmits the control signal from the controller microcomputer 26 to the parking detection display means 30 via the communication power supply line 21, or transmits the detection signal transmitted from the parking detection display means 30. Transfer to the controller microcom 26. Both the power supply from the power supply unit 23 and the communication signal from the lower communication unit 24 are transmitted to the parking detection display means 30 via the communication power supply line 21.

The controller memory 27 stores information necessary for driving the local controller 20. According to an embodiment of the present invention, the controller memory 27 is composed of an electrically erasable and programmable ROM (EE-PROM). The controller memory 27 composed of Y pyrom can electrically erase the existing contents and record new contents. In the controller memory 27 configured of this pyrom, an administrator or a controller microcomputer 26 may record information of the local controller 20. In addition, the controller memory 27 composed of Y pyrom is programmed with an electric pulse and, once programmed, becomes read only. The controller memory 27 is preferably embedded in the controller microcom 26 to reduce the installation space.

The controller memory 27 stores the production serial number and the identification number of the local controller 20. The serial number of the local controller 20 is uniquely assigned to the product from the time of manufacture, and is a unique number of the equipment, so that the length of the number can be directly assigned to distinguish the local controller 20 among numerous equipment. Relatively long The identification number of the local controller 20 is a number assigned to each of the production serial numbers for distinguishing the local controller 20. The identification number of the local controller 20 is a number for distinguishing the local controller 20 in the parking space guidance system according to the present invention, and the local controller 20 is divided by a number of units that are relatively smaller than the serial number. do.

4 is a block diagram of a parking detection display means according to the present invention. As shown in FIG. 4, the parking detection display means 30 includes a sensor power supply unit 31, a sensor communication unit 32, a sensor microcomputer 33, a sensor memory 34, an A / D converter 35, and a sensor transmitter. 36, a sensor receiver 37, a rectifier 38a, a constant voltage supply 38b, and a parking enable indicator 39. The sensor power supply unit 31 transfers power transmitted through the communication power supply line 21 to the sensor microcomputer 33.

The sensor communication unit 32 receives a control signal of the local controller 20 transmitted through the communication power supply line 21 or transmits a sensor signal detected from the sensor receiver 37 to the local controller 20. The same protocol as that of the lower communication unit 24 of the local controller 20 is used for the sensor communication unit 32.

The sensor micom 33 controls the ultrasonic signal radiation of the sensor transmitter 36 and analyzes the ultrasonic signal from the sensor receiver 37. In addition, the sensor microcomputer 33 controls the blinking of the parking indicator of the parking available indicator 39. In order to reduce the installation space, the sensor memory 34 and the A / D converter 35 are preferably embedded in the sensor microcomputer 33.

According to an embodiment of the present invention, the sensor memory 34 is composed of an electrically erasable and programmable ROM (EE-PROM). In the sensor memory 34, information of individual operation procedures for the manner in which each parking detection display means 30 operates individually, the group number in the manner of operating in a group, and the production of each parking detection display means 30 The serial number and the identification number of each parking detection display means 30 corresponding to the production serial number are stored.

The information of the individual operation sequence of the parking detection display means 30 is a parking detection display means that each calculated by factors such as the exhaust time of the ultrasonic signal generated by the sensor transmitter 36 and the distance between the parking spaces does not cause interference. Information relating to the procedure of individually driving the 30. The group number of the parking detection display means 30 is the same drive to classify the parking detection display means 30 that does not cause interference until the exhaustion period of the ultrasonic signal by group to simultaneously drive the parking detection display means 30 of the same group. A number identifying The production serial number of the parking detection display means 30 is a number uniquely designated from the time of production, and the identification number of the parking detection display means 30 is for distinguishing the parking detection display means 30 in the system according to the present invention. Number.

The A / D converter 35 converts the ultrasonic signal detected by the sensor receiver 37 as analog data into digital data. The sensor transmitter 36 emits an ultrasonic signal to the parking space in which the parking detection display means 30 is installed. The sensor transmitter 36 generates and radiates an ultrasonic signal using a built-in timer of the sensor microcomputer 33. The sensor transmitter 36 includes an ultrasonic sensor drive for amplifying the ultrasonic signal and an ultrasonic emission sensor for emitting the amplified ultrasonic signal.

The sensor receiver 37 detects and receives the magnitude of the reflected signal of the ultrasonic signal emitted from the sensor transmitter 36 using the A / D converter 35. The sensor receiver 37 includes an ultrasonic sensor for receiving a signal reflected by the ultrasonic signal radiated from the sensor transmitter 36 and an ultrasonic sensor receiver for amplifying the received signal.

The rectifier 38a rectifies the power transmitted through the communication power supply line 21 and supplies it to the parking available indicator 39. The constant voltage supply unit 38b supplies a constant voltage to the sensor microcomputer 33. The voltage supplied from the rectifying section 38a to the parking available indicator 39 and the voltage supplied from the constant voltage supply section 38b to the sensor microcom 33 have different values. Accordingly, the parkable indicator 39 is driven by using the potential difference between the voltage supplied from the rectifying unit 38a and the voltage of the constant voltage supplying unit 38b even without a separate power supply device.

According to an exemplary embodiment of the present invention, the sensor microcom 33 detects an ultrasonic signal disorder that generates an ultrasonic disturbance signal for an ultrasonic signal outside a predetermined amplitude by analyzing the magnitude of the ultrasonic reception signal sensed and amplified by the sensor receiver 37. It is preferable to further contain a part. The ultrasonic signal failure detection unit is driven by the central processing unit included in the configuration of the sensor microcomputer 33.

5A and 5B are flowcharts illustrating a process of internally setting a parking space system according to the parking space guidance method of the present invention. 5A and 5B, in order to set an identification number of the local controller, the central controller calls the serial number of the local controller (S100). Specifically, the central controller 10 calls the serial number stored in the controller memory 27 of the local controller 20 via the controller network 11 via the central communication unit 18.

The local controller 20 having the production serial number corresponding to the call of the central controller 10 transmits a signal in response to the call of the central controller 10 through the upper communication unit 22, and continuously the central controller 10. ) Sets the controller identification number of the local controller 20 in response to the call (S102). Each controller identification number of the local controller 20 is used to transmit a signal to the local controller 20 when the central controller 10 transmits a signal to the local controller 20.

The controller microcom 26 stores the controller identification number set as described above in the controller memory 27 of the corresponding local controller 20 (S104). Thereafter, the central controller 10 determines whether the controller identification numbers of all the local controllers 20 are set (S106). If the controller identification numbers of all the local controllers are set, the process proceeds to the next step, and if there is a local controller for which the controller identification number is not set, the process returns to step S100.

After setting the controller identification number, the central control unit 10 calls the production serial number of the parking detection display means 30 (S110). The parking detection display means 30 having the serial number corresponding to the call of the central control unit 10 transmits a signal in response to the call of the central control unit 10 via the local controller 20, and continuously the central control unit. 10 sets the sensor identification number of the parking detection display means 30 in response to the call (S112).

Thereafter, the sensor microcomputer 33 stores the set sensor identification number in the sensor memory 34 (S114). The sensor identification number stored in the sensor memory 34 indicates that when the local controller 20 transmits a control signal to the parking detection display means 30, the local controller 20 displays the parking detection display means 30 corresponding to the control object. Used during the call process.

After setting and storing the controller identification number and the sensor identification number, the central controller 10 receives the parking lot structure data (S120). The parking lot structure data input by the central control unit 10 is the distance between the position of the sensor transmitter 36 and the sensor receiver 37 installed on the ceiling wall of the parking lot and the floor of the parking lot, the location of the parking spaces, the width of the parking space, the parking space. Data about whether side walls are formed, and information such as a distance between adjacent parking spaces.

The calculation processing unit 16 of the central control unit 10 calculates the interference avoidance distance through the input parking lot structure data (S122). To this end, the arithmetic processing unit 16 of the central control unit 10 is provided with a program module for calculating the interference avoidance distance. In order to calculate the interference avoidance distance, the route in which the ultrasonic signal radiated to the maximum spread and propagates is reflected to the vehicle is calculated in consideration of the radiation angle of the ultrasonic signal and the angle of the ceiling of the general vehicle with the horizontal plane. According to the size of the ultrasonic signal, the traveling distance of the ultrasonic signal is calculated based on the time that the sensor cannot exhaust the sensor and the speed of the ultrasonic signal.

Accordingly, it is possible to calculate which area of the parking space the ultrasonic signal generated from the parking detection display means 30 of one parking space is affected by the ultrasonic signal traveling route and the traveling distance. In this case, since an error may occur in a practical situation, an interference avoidance distance multiplied by a deviation value within the error range theoretically calculated, i.e., a value larger than the calculated interference avoidance distance by a predetermined ratio, may be used. The interference avoidance distance of the parking detection display means 30 is calculated.

The program module of the arithmetic processing unit 16 sets the individual operation sequence of the parking detection display means 30 to avoid the interference through the calculated avoidance distance (S124). The individual operation sequence of the parking detection display means 30 determines the individual operation of the parking detection display means 30 connected to one local controller 20, and the parking detection display means connected to the other local controller 20. Determine the individual operation of (30). That is, the individual operation order of the parking detection display means 30 connected thereto for each local controller 20 is set separately.

The program module of the arithmetic processing unit 16 sets a group number for dividing the parking detection display means 30 for each group by avoiding interference through the calculated interference avoidance distance (S126). Accordingly, the parking detection display means 30 corresponding to the same group number is set to operate at the same time. In this case, the program module of the arithmetic processing unit 16 avoids the actual interference avoidance of the interference avoidance distance used in the calculation divided into groups by a predetermined ratio as compared with the calculated interference avoidance distance as in the case of setting the individual operation order. Calculate as distance.

Thereafter, the sensor microcomputer 33 stores the information of the set individual operation procedure and the group number in the sensor memory (S128). According to an embodiment of the present invention, the sensor memory 34 is composed of a read-only E-pyrom to determine the operation sequence of each parking detection display means 30 when a control signal is transmitted from the local controller 20. According to the operation method, the information and the group number of the individual operation procedure are read from the sensor memory 34.

The central control unit 10 determines whether the information of all the parking detection display means 30 is set (S129). If the information of all the parking detection display means 30 is set, the process proceeds to the next process. Otherwise, the process returns to step S110 to set the information for the other parking detection display means.

After completing the above information setting of the local controller 20 and the parking detection display means 30, the parking space guidance system according to the present invention is in a state capable of inspecting the parking situation. In this state, the central controller 10 receives a key input of a detection method (S130). The detection method is composed of an individual designation method and a group operation method, and is displayed in the form of an icon on the display unit 14 of the central control unit 10.

The central control unit 10 determines the input key input (S132). If the key input is individual designation, the process proceeds to step S200. If the key input is group designation, the process proceeds to step S300.

Now, the parking space detection and display process through the individual designation method will be described with reference to FIG. 6. 6 is a flowchart illustrating a process of detecting and displaying a parking space by an individual designation method. As shown in FIG. 6, the central controller 10 transmits an individual designation execution command signal to the local controller 20 (S200).

The local controller 20 detects the parking space in the parking detection display means 30 according to the order of the individual designation method, and transmits a detection display command signal to display the parking situation (S202). In this process, the information of the individual operation order stored in the sensor memory 34 of the parking detection display means 30 is read, and the parking detection display means 30 according to the order is operated.

Parking detection display means 30 corresponding to the individual operation sequence transmits and receives an ultrasonic signal (S210). The ultrasonic signal is amplified and radiated by the sensor transmitter 36, and the sensor receiver 37 receives and amplifies the reflected signal of the radiated ultrasonic signal and transmits it to the sensor microcomputer 33. The signal transmitted to the sensor microcomputer 33 is converted into a digital signal by the A / D converter 35 as an analog signal.

Parking detection display means 30 determines the presence or absence of the vehicle by calculating the interval between the transmission time and the reception time of the ultrasonic signal (S212). In this step, when the size of the ultrasonic reception signal is out of the size of the normal reception signal, the sensor microcomputer 33 determines this and transmits the ultrasonic reception failure signal to the central controller 10 via the local controller 20.

Judgment on vehicle presence is as follows. If there is a vehicle, the ultrasonic signal is emitted and reflected from the upper surface of the vehicle and received by the sensor receiver 37. On the other hand, when there is no vehicle, the ultrasonic signal is emitted and reflected from the bottom surface of the parking space and received by the sensor receiver 37. Accordingly, the interval between the transmission time and the reception time when there is a vehicle is relatively short compared to the interval between the transmission time and reception time when there is no vehicle.

Through this, the parking detection display means 30 determines whether there is a vehicle in the corresponding parking space (S214), and when there is a parked vehicle, the parking available indicator 39 is turned off (S215), when there is no parked vehicle. Parking available indicator 39 is turned on (S216).

After that, the parking detection display means 30 transmits the details of determining whether the vehicle is present to the local controller 20 (S218). Subsequently, each local controller 20 determines whether the parking situation has been received from all the parking detection display means 30 connected through the communication power supply line 21 (S220).

If the parking situation is received from all the parking detection display means 30, the local controller 20 transmits the parking situation to the central controller 10 (S222). On the other hand, if no parking condition has been received from all the parking detection display means 30, the flow returns to step S202. The display unit 14 of the central controller 10 displays the received parking situation on the screen (S224). Through such a process, not only the operation of the parking available indicator 39 of each parking detection display means 30 is determined, but also the parking status is displayed on the central controller 10 so that the central controller 10 can monitor the parking status. Can be.

Now, the parking space detection and display process through the group designation method will be described with reference to FIG. 7. 7 is a flowchart illustrating a process of detecting and displaying a parking space by a group designation method. Since the parking space detection and display process according to the group designation method goes through some of the same steps as the parking space detection and display process according to the individual designation method, detailed description of overlapping portions will be omitted. As shown in FIG. 7, the central controller 10 transmits a group designation type execution command signal to the local controller 20 (S300). The local controller 20 detects the parking space in the parking detection display means 30 according to the group order of the group designation method, and transmits a detection display command signal to display the parking situation (S302).

Parking detection display means 30 of the same group corresponding to the group operation sequence transmits and receives an ultrasonic signal (S310). Subsequently, each parking detection display means 30 corresponding to the same group calculates the interval between the transmission time and the reception time of the ultrasonic signal to determine whether the vehicle is present (S312). In this step, when the size of the ultrasonic reception signal is out of the size of the normal reception signal, the sensor microcomputer 33 determines this and transmits the ultrasonic reception failure signal to the central controller 10 via the local controller 20.

Through this, each of the parking detection display means 30 corresponding to the same group determines the vehicle presence or absence of the corresponding parking space (S314), and if there is a parked vehicle, the parking available indicator 39 is turned off (S315), and parking If there is no vehicle, the parking available indicator 39 is turned on (S316).

Thereafter, the parking detection display means 30 of the same group transmits the details of determining whether the vehicle is present to the local controller 20 to which each parking detection display means 30 is connected (S318). Subsequently, each local controller 30 determines whether the parking situation is received from all the parking detection display means 30 connected through the communication power supply line 21 (S320).

If the parking situation is received from the parking detection display means 30 of all groups, the local controller 20 transmits the parking situation to the central controller 10 (S322). On the other hand, if no parking condition is received from the parking detection display means 30 of all groups, the flow returns to step S302. The display unit 14 of the central control unit 10 displays the received parking situation on the screen (S324).

The embodiments described above are merely illustrative of the preferred embodiments of the present invention, the scope of the present invention is not limited to the described embodiments, those skilled in the art within the spirit and claims of the present invention It will be understood that various changes, modifications, or substitutions may be made thereto, and such embodiments are to be understood as being within the scope of the present invention.

The present invention can avoid the interference between the sensors in the process of detecting by the ultrasonic signal whether the car in the parking space. In addition, the present invention is integrated with the sensor and whether the parking lights can be integrated, there is no need for a separate connection between the sensor and the light, there is an effect that the installation method is simple and can reduce the cost. In addition, the present invention is to turn on the parking availability indicator in any direction of 360 ° so as to be visible from any position to provide easy access to the parking space quickly. In addition, the present invention can not only simplify the installation line by integrating the power line and the communication line, but also has a remarkable effect of reducing the number of installation lines to reduce the cost.

Claims (14)

A central control unit having a central communication unit; An upper communication unit connected to the central communication unit and a network, a lower communication unit connected to transmit and receive communication signals with the upper communication unit, a controller microcom for controlling the upper communication unit and the lower communication unit, and a power supply unit for supplying power, respectively A plurality of local controllers; A sensor communication unit for transmitting and receiving a communication signal with the lower communication unit via a communication power and communication line connected to the lower communication unit and the power supply unit, and a sensor power supply unit and a sensor microcomb that receive power from the power supply unit via the communication power and communication line. A sensor transmitter for generating and radiating an ultrasonic signal using an internal timer of the sensor, A sensor receiver for detecting the magnitude of the reflected signal of the emitted ultrasonic signal through an A / D converter, Parking available indicator for displaying whether or not parking, and The sensor microcom is configured to control the sensor communication unit, the sensor transmitter, the sensor receiver, and the parking available indicator, and to determine whether parking is possible by calculating an interval between the time when the ultrasonic signal is emitted and the time when the ultrasonic signal is detected. Note composed of a plurality of parking detection display means provided Spatial information system. The parking space guidance system of claim 1, wherein the controller microcomputer further comprises an e-pyrom memory for storing a controller serial number and a controller identification number. The sensor microcomputer according to claim 1 or 2, wherein the sensor micom has individual operation sequence information of the sensor transmitting unit and the sensor receiving unit of the parking detecting display means, a group number indicating the same group operating sequence, and a production sequence of the parking detecting display means Parking number guidance system further comprises an E-pirom memory for storing a number, and the identification number of the parking monitoring display means. 4. The apparatus of claim 3, further comprising a rectifying unit for rectifying a power signal from the communication power line and a constant voltage supply unit connected to the parking available indicator. And the parking available indicator is driven by using a potential difference between a voltage supplied from the rectifier and a voltage supplied from the constant voltage supply. The parking space guidance system of claim 3, wherein the sensor microcomputer further includes an ultrasonic signal failure detection unit configured to detect an obstacle of an ultrasonic signal by determining the magnitude of the detected ultrasonic signal. 4. The parking space guidance system of claim 3, wherein the parking available indicator comprises light emitting diodes formed in all directions to be displayed in all directions. Setting, by the central controller, the controller identification number of the local controller and the sensor identification number of the parking detection display means; Receiving, by the central control unit, parking lot structure data and calculating an ultrasonic interference avoiding distance according to the parking lot structure; Setting, by the central control unit, an individual operation sequence of the parking detection display means in which interference is avoided through the calculated avoidance distance; Setting, by the central controller, a group number by dividing the parking detection display means by which the interference is avoided through the calculated interference avoidance distance for each group; Receiving, by the central controller, a key input of a detection method from an input device; Transmitting, by the central control unit, an individual designation method execution command signal to the local controller when the key input detection method is an individual designation method; Transmitting, by the local controller, a detection display command signal to the parking detection display means in accordance with the set individual operation sequence; Determining, by the parking detection display means, whether or not the vehicle is calculated by calculating a difference between the transmission time and the reception time of the ultrasonic signal by transmitting and receiving an ultrasonic signal; The parking available indicator is turned off when there is a vehicle parked in the parking space in which the parking detection display means is installed and turned on when there is no parked vehicle; Transmitting, by the parking detection display means, the content of determining whether the vehicle is present to a local controller; And the local controller transmits the parking situation to the central control unit and displays the current parking situation by the display unit of the central control unit. The method of claim 7, wherein the setting of the controller identification number of the local controller and the sensor identification number of the parking detection display means by the central controller, And the central controller sets the controller identification number corresponding to the production identification number of the local controller and sets the sensor identification number corresponding to the production identification number of the parking detection display means. The method of claim 7 or 8, wherein the parking detection display means transmits and receives an ultrasonic signal to determine a vehicle presence by calculating a difference between the transmission time and the reception time of the ultrasonic signal, The parking detection display means determines the magnitude of the received ultrasonic signal and transmits an ultrasonic reception failure signal to the local controller for an ultrasonic signal outside the normal ultrasonic signal amplitude range, and the local controller sends the ultrasonic reception failure to the central controller. Parking space guidance method further comprising the step of transmitting a signal. The method of claim 7 or 8, wherein the parking available indicator is turned off when there is a vehicle parked in the parking space in which the parking detection indicator is installed, and is turned on when there is no parked vehicle. Parking space guidance method that the parking available indicator is turned on to indicate whether the parking available in all directions of 360 °. Setting, by the central controller, a controller identification number of the local controller and a sensor identification number of the parking detection display means; Receiving, by the central control unit, parking lot structure data and calculating an ultrasonic interference avoiding distance according to the parking lot structure; Setting, by the central control unit, an individual operation sequence of the parking detection display means in which interference is avoided through the calculated avoidance distance; Setting, by the central controller, a group number by dividing the parking detection display means by which the interference is avoided through the calculated interference avoidance distance for each group; Receiving, by the central controller, a key input of a detection method from an input device; Transmitting, by the central controller, the parking detection display execution command signal to the local controller according to the group number of the group designation method when the key input detection method is a group designation method; Transmitting, by the local controller, a detection display command signal to the parking detection display means in the order of the set group number; Determining whether a vehicle is present by calculating and detecting a difference between a transmission time and a reception time of the ultrasonic signal by transmitting and receiving an ultrasonic signal by the parking detection display means corresponding to the same group according to the set group number sequence; A parking available indicator of the parking detection display means corresponding to the same group is turned off when there is a vehicle parked in the parking space in which the parking detection display means is installed, and turned on when there is no parked vehicle; Transmitting, by the parking detection display means, the content of determining whether the vehicle is present to a local controller; And the local controller transmits the parking situation to the central control unit and displays the current parking situation by the display unit of the central control unit. 12. The method of claim 11, wherein the central controller sets the controller identification number of the local controller and the sensor identification number of the parking detection display means. And the central controller sets the controller identification number corresponding to the production identification number of the local controller and sets the sensor identification number corresponding to the production identification number of the parking detection display means. The vehicle according to claim 10 or 11, wherein the parking detection display means corresponding to the same group transmits and receives an ultrasonic signal according to the set group number order, and calculates a difference between the transmission time and the reception time of the ultrasonic signal. The step of determining whether there is, The parking detection display means corresponding to the same group determines the magnitude of the received ultrasonic signal and transmits an ultrasonic reception disturbance signal to the local controller for an ultrasonic signal outside the normal ultrasonic signal amplitude range, and the local controller is configured to control the central controller. The parking space guidance method further comprising the step of transmitting the ultrasonic reception disorder signal. According to claim 10 or 11, wherein the parking available indicator of the parking detection display means corresponding to the same group is turned off when there is a vehicle parked in the parking space in which the parking detection display means is installed, and lights up when there is no parked vehicle. The steps to become Parking space guidance method that the parking available indicator is turned on to indicate whether the parking available in all directions of 360 °.

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