Parking lot monitoring system and parking lot monitoring method

Abstract

It makes it possible to grasp abnormal conditions in parking lots. [Solution] The system includes a sensor that measures the condition of a parking space in a parking lot by irradiating radio waves onto the parking space and receiving the reflected waves, a detection unit that detects whether the measurement results of the sensor contain data representing biological activity, and a judgment unit that determines whether there is a possibility of an abnormality occurring based on the detection results of the detection unit.

Description

[Technical Field]

[0001] The present invention relates to a parking lot monitoring system and a parking lot monitoring method. [Background technology]

[0002] A user who travels with a vehicle such as an automobile may use a parking lot at a destination. If the destination is a large supermarket, a commercial complex, a theme park, or the like, parking spaces that can accommodate a large number of vehicles are provided. There is a system that detects whether or not there is a vacant space available for parking in such a parking lot and provides guidance within the parking lot (see, for example, Patent Document 1). A user (e.g., a driver) can decide which available space to park in based on the availability of available spaces, which saves the time and effort of patrolling the parking lot in search of an available space, improving the convenience of parking lots. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 8-96298 Summary of the Invention [Problem to be solved by the invention]

[0004] However, while this improves the convenience of parking a vehicle, various situations can occur in parking lots. For example, after parking a vehicle in a parking space, if the driver does not get out of the vehicle to enter the facility, passengers such as children may be left behind in the vehicle. In this case, the temperature and humidity inside the parked vehicle may become high, which may affect the physical condition of the passengers. In addition, there is a possibility that the vehicle may be broken into, for example. Therefore, it is desirable to be able to detect such abnormal conditions in parking lots.

[0005] The present invention has been made in view of the above circumstances, and its object is to provide a parking lot monitoring system and parking lot monitoring method that are capable of detecting abnormal conditions in a parking lot. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, one aspect of the present invention is a parking lot monitoring system that includes a sensor that measures the status of a parking space in a parking lot by irradiating radio waves onto the parking space and receiving the reflected waves, a detection unit that detects whether the measurement results of the sensor include data representing biological activity, and a judgment unit that determines whether there is a possibility of an abnormality occurring based on the detection results of the detection unit.

[0007] Another aspect of the present invention is a parking lot monitoring method executed by a computer, which includes irradiating radio waves onto a parking space in a parking lot and measuring the status of the parking space with a sensor by receiving the reflected waves, detecting whether the measurement results of the sensor include data representing biological activity, and determining whether there is a possibility of an abnormality occurring based on the detection results. [Effects of the Invention]

[0008] As described above, according to the present invention, it is possible to grasp abnormal conditions in a parking lot. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a conceptual diagram seen from the side of a parking lot in which a parking lot monitoring system S according to an embodiment of the present invention is used. [Figure 2] FIG. 2 is a plan view showing an outline of parking lot P as seen from above. [Figure 3] 1 is a system configuration diagram showing the configuration of a parking lot monitoring system S. FIG. [Figure 4] 4 is a flowchart illustrating the operation of the parking lot monitoring system S. [Figure 5] 4 is a flowchart illustrating the operation of the parking lot monitoring system S. [Figure 6] 10 is a flowchart for monitoring a situation using measurement results from a plurality of sensors Se. [Figure 7] FIG. 3 is a plan view showing a part of the parking lot P shown in FIG. [Figure 8] FIG. 3 is a plan view showing a part of the parking lot P shown in FIG. [Figure 9] 9 is a plan view showing a state after a person L20 has boarded a vehicle and left the parking lot P, following the second state shown in FIG. 8. FIG. [Figure 10] FIG. 3 is a plan view showing a part of the parking lot P shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] A parking lot monitoring system according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a conceptual side view of a parking lot in which a parking lot monitoring system S according to an embodiment of the present invention is used. Parking lot P is provided with parking spaces PS1 and PS2 on either side of an aisle K. While the parking lot P will be described as being an indoor parking lot, it may also be an outdoor parking lot. A parking space here is a section of parking lot P that can accommodate one vehicle. A vehicle V is parked in the parking space PS1, making it full, and a person L is standing near the vehicle V. There is no vehicle parked in parking space PS2 and it is vacant. An attachment member B is provided on the ceiling of the parking lot P above the passage K so as to protrude downward from the ceiling to an extent that it will not hit vehicles or people. Sensors Se (Se1, Se2, ...) are installed on the mounting member B. Here, the case where the sensors Se are installed on the mounting member B will be described, but the sensors Se may be installed by being attached to any of a wall, ceiling, pole, mounting jig, etc.

[0011] At least one indicator D (D1, D2) is provided in the parking lot P. Here, an indicator D is provided for each parking space. For example, indicator D1 is attached to the ceiling above parking space PS1 and indicates whether a vehicle is parked in parking space PS1. Indicator D1 is, for example, a lamp. Indicator D1 may be configured to light up red when a vehicle is parked and to light up green when no vehicle is parked. In addition, indicator D1 may be a display device. When indicator D1 is a display device, it may be configured to indicate whether the parking space is parked or not by displaying the character string "full" or "vacant," or to display the entire screen in red when a vehicle is parked and in green when no vehicle is parked. In addition, indicator D1 may be configured to light up in a color (e.g., yellow) indicating an abnormality in addition to the full or vacant state. The indicator D2 is attached to the ceiling above the parking space PS2 and indicates whether a vehicle is parked in the parking space PS2. The indicator D2 may be, for example, a display device or a lamp. Since the display D1 and the display D2 are provided near the ceiling, it is possible to easily know whether the parking space PS1 or the parking space PS2 is available or not, even from a distance.

[0012] The sensors Se (Se1, Se2, ...) are attached to the attachment member B and measure the status of the parking spaces by irradiating radio waves onto the parking spaces and receiving the reflected waves. The status of the parking spaces may be whether or not a vehicle is in or near the parking space, or whether or not a person is in or near the parking space. The sensors Se may also measure the status of the observation area according to a change in the phase between the radar's irradiated waves and the observation waves that are received as radio waves reflected from the irradiated waves. The sensor Se is, for example, a radar sensor such as a millimeter-wave radar, and is installed so that one sensor Se is assigned to each parking space PS (PS1, PS2, etc.) in the parking lot P. The sensor Se has the function of detecting the pulse, breathing, and other vital signs of a person present within its measurement range from the movements of their body surface, and generating vital data representing the detection results. The vital data is data in which values ​​representing the status of biological activity such as pulse, breathing, etc. are arranged in chronological order.

[0013] The sensor Se observes the floor of the parking space from the ceiling side of the aisle K. When a vehicle is parked in the parking space facing forward into the aisle K, the sensor Se can observe the interior of the vehicle through (transmitting light from) the windshield of the vehicle, and can measure the vital data of a person if one is in the vehicle. The sensor Se can also detect whether or not a person is present inside the vehicle even if there are curtains or the like on the vehicle windows, and can also detect the presence of a person even if a towel or the like is draped over the person, making it difficult to see from the outside. When a vehicle is parked in a parking space with its rear facing the aisle K, the sensor Se can observe the interior of the vehicle through the rear window of the vehicle, and can measure the vital data of a person if one is in the vehicle. If the vehicle does not have a rear window, it can observe whether or not a person is in the vehicle from behind the vehicle without going through the rear window. Here, since a vehicle does not move while parked in a parking space, if a person is in the vehicle, there will be body movements of the person and movements of the person's body surface due to biological activity, and the sensor Se can identify whether a person is present in the measurement area by obtaining measurements corresponding to this movement. Also, since the reflection cross-sectional area of ​​the irradiated wave is larger for a vehicle than for a person, when the vehicle is moving, the amount of fluctuation in the measurements obtained by the sensor Se becomes large, making it possible to identify whether the vehicle or a person is moving.

[0014] The sensor Se1 irradiates radio waves onto the parking space PS1 and measures the situation of the parking space PS1. The sensor Se2 irradiates the parking space PS2 with radio waves and measures the situation of the parking space PS2. Note that the observation range of each sensor Se may be set to detect the inside of one parking space, or may be set to include the parking space to be observed and part of the parking space adjacent to the parking space to be observed. In this way, if a vehicle is parked at an angle to the parking space and observation through the windshield (or rear window) is difficult, the sensor Se observing the adjacent parking space can also make observation through a window on the side of the vehicle.

[0015] FIG. 2 is a plan view showing an outline of the parking lot P as seen from above. In the parking lot P, the sensor group Se1A includes a plurality of sensors (for example, a sensor Se1a1). The plurality of sensors (sensor Se1a1) are arranged at intervals from one another on the mounting member Ba so as to form a line along the parking space row PS1a1. The sensor group Se2A includes a plurality of sensors (for example, a sensor Se2a1). The plurality of sensors (sensor Se2a1) are arranged at intervals from one another so as to form a line along the parking space row PS2a1. The sensor group Se1B includes a plurality of sensors (for example, sensor Se1b1). The plurality of sensors (sensor Se1b1) are arranged at intervals from one another so as to form a line along the parking space row PS1b1. The sensor group Se2B includes a plurality of sensors (for example, sensor Se2b1). The plurality of sensors (sensor Se2b1) are arranged at intervals from one another so as to form a line along the parking space row PS2b1.

[0016] The parking space columns PS1a1, PS2a1, PS1b1, and PS2b1 each include a plurality of parking spaces, including parking spaces where a vehicle is parked, parking spaces where no vehicle is parked, parking spaces where a vehicle is about to exit, and parking spaces where a vehicle is about to enter.

[0017] Also, there is a person L in the parking lot P. There may be multiple people L in the parking lot P. In the parking lot P, the actions of the person L include sitting in a seat in a vehicle, getting out of a parked vehicle, getting into a parked vehicle, and moving between the parking space and inside the facility. Although not shown, the parking lot P is provided with a plurality of indicators, one indicator for each parking space.

[0018] FIG. 3 is a system configuration diagram showing the configuration of the parking lot monitoring system S. The parking lot monitoring system S includes a plurality of units (U1, U2, U3, . . . Un), a control device 10, a determination device 20, a storage device 30, and a notification device 40. Each of the units U (U1, U2, U3, ... Un) includes a sensor and a display. Each sensor generates vital data at each measurement interval and transmits the vital data to the control device 10 at each transmission timing. One of these units is provided for each parking space. For example, the unit U1 includes a sensor Se1a1 and a display D1a1. The sensor Se1a1 and the display D1a1 are connected to the control device 10 wirelessly or by wire. The number of units may be determined according to the number of parking spaces.

[0019] The control device 10 is communicatively connected to each unit U, and is also communicatively connected to the determination device 20. The control device 10 acquires vital data measured each time the measurement timing of the sensor Se of each unit U arrives. Here, each sensor Se and display D is assigned identification information, and based on this identification information, it is possible to determine which parking space the sensor and display are installed for. The control device 10 may transmit a request to acquire vital data to the sensor Se, and acquire the vital data transmitted in response to the request. Furthermore, the control device 10 outputs, in accordance with the determination result of the determination device 20, an instruction to the indicator D to be lit up in a color in accordance with the determination result.

[0020] The determination device 20 is communicably connected to the control device 10, and is also connected to the storage device 30 and the notification device 40. The determination device 20 includes a detection unit 21, a determination unit 22, and a control unit 23. The detection unit 21 detects whether or not data representing biological activity is included in the measurement results of the sensors Se of the units U. The detection unit 21 performs such detection processing for each sensor Se. Furthermore, based on the measurement results of the sensor Se, the detection unit 21 has the function of determining whether or not a vehicle is present in the parking space, whether or not the vehicle is in the process of entering the parking space, or whether or not the vehicle is in the process of leaving the parking space, etc. The detection unit 21 can also perform both detection regarding the parking status of these vehicles and detection regarding whether or not data representing biological activity is included.

[0021] The determination unit 22 determines whether or not there is a possibility of an abnormality occurring, based on the detection results of the detection unit 21. The determination unit 22 performs the determination process for each of the detection results detected by the detection unit 21. The determination unit 22 determines that there is a possibility that a person has been left behind in the vehicle when the presence of a vehicle in the parking space is detected and the period during which data representing biological activity has been detected is equal to or longer than a first reference time (for example, Y minutes, as described below). Furthermore, when the presence of a vehicle in a parking space is detected and the period during which data representing biological activity is detected is less than a first reference time and is equal to or longer than a second reference time (for example, Z minutes, as described below) that is shorter than the first reference time, the judgment unit 22 judges that there is a possibility that a person who needs to be confirmed is present near the vehicle. In addition, the judgment unit 22 acquires vital data including at least one of respiration and heart rate from the data representing biological activity, and if the acquired vital data is within a range indicating abnormality, it judges that the person requiring confirmation may be a suspicious person.

[0022] The determination unit 22 determines that the person requiring confirmation may be lost when, after a first sensor among the multiple sensors detects a vehicle entering or leaving a parking space, at least one of the remaining sensors different from the first sensor detects data representing biological activity for a period of time longer than a third reference time (for example, X minutes, as described below).

[0023] The control unit 23 controls each part of the determination device 20 . For example, the control unit 23 transmits the report data to a report destination in accordance with at least one of the detection result of the detection unit 21 and the determination result of the determination unit 22. The report destination may be, for example, a monitoring system of a fire station, a monitoring system of a police station, a management system of a management center that manages the parking lot P, or the like.

[0024] The detection unit 21, the determination unit 22, and the control unit 23 may be configured by a processing unit such as a CPU (Central Processing Unit) or a dedicated electronic circuit.

[0025] The storage device 30 is communicably connected to the determination device 20. Every time the determination device 20 acquires vital data from the control device 10, the storage device 30 stores the acquired vital data as a log for each sensor Se. The storage device 30 also stores the sensor Se, the display D, data indicating the correspondence with the parking spaces, map data indicating the layout of each parking space within the parking lot P, and the like. The storage device 30 is composed of a storage medium, such as a hard disk drive (HDD), flash memory, electrically erasable programmable read-only memory (EEPROM), random access read / write memory (RAM), read-only memory (ROM), or any combination of these storage media. The storage device 30 may be, for example, a nonvolatile memory.

[0026] The notification device 40 is communicably connected to the determination device 20. The notification device 40 outputs a notification based on various information received from the determination device 20. The notification device 40 may be equipped with a speaker and may output a notification sound, a voice message indicating the content of the notification, etc. based on the various information received from the determination device 20. The notification device 40 may also be equipped with a display device and may be configured to display a message indicating the content of the notification, or data (such as the name and address of the parking lot P) that can identify which parking lot P caused the notification to be output, etc. based on the various information received from the determination device 20.

[0027] Furthermore, the control device 10, the determination device 20, and the storage device 30 may each be a single device or physical server, or may be realized by a cloud server provided by a cloud computing service.

[0028] 4 and 5 are flowcharts illustrating the operation of the parking lot monitoring system S. 4 and 5 are flowcharts for explaining the process when monitoring one unit U (one sensor Se). Each sensor Se in the parking lot P irradiates a measurement target area with radio waves, receives the reflected waves, and transmits a reception signal corresponding to the received reflected waves to the control device 10 as a measurement result. The control device 10 receives the measurement results transmitted from each sensor Se, and outputs the received measurement results to the determination device 20. When the determination device 20 receives the measurement results from the control device 10, the determination device 20 stores the measurement results in the storage device 30 as a log.

[0029] The detection unit 21 of the determination device 20 detects whether a vehicle is present in the parking space, thereby detecting whether a vehicle is already parked in the parking space (step S101). Here, the storage device 30 stores a parked presence / absence reference value based on a measurement value representing a measurement result measured by the sensor Se when a vehicle is parked in the parking space. The parked presence / absence reference value is a reference value for determining whether a vehicle is parked in the parking space. The detection unit 21 reads out this parked presence / absence reference value and determines whether a measurement value representing the measurement result obtained this time is within a range specified for this parked presence / absence reference value. If the measurement value is determined to be within the specified range for the parked presence / absence reference value, the detection unit 21 detects that a vehicle is parked in the parking space (already parked); if the measurement value is not within the specified range, the detection unit 21 detects that a vehicle is not parked in the parking space. Here, when no vehicle is parked in the parking space, the reflected wave reflected from the floor of the parking space or the wall at the rear of the parking space is observed. On the other hand, when a vehicle is parked in the parking space, the reflected wave that reaches and is reflected by the vehicle before the irradiated wave reaches the wall or floor can be observed, so the time for observing the reflected wave is shorter than when no vehicle is parked.

[0030] Here, the parking presence / absence reference value stored in the storage device 30 may be a different value for each unit U. For example, the distance from the sensor Se to the parking space may vary within the parking lot P. In this case, the measurement value measured when a vehicle is parked in the parking space may also vary depending on the parking space. Furthermore, a predetermined value may be used for the certain range set for the parking presence / absence reference value. For example, the size and shape of the vehicle parked in the parking space vary depending on the model (light car, sedan, minivan, SUV (Sport Utility Vehicle)), and therefore the measurement result will also vary. Therefore, the predetermined range may be determined taking these factors into consideration.

[0031] If the detection unit 21 detects that the vehicle is not already parked (step S101-NO), the process proceeds to step S201. On the other hand, if the detection unit 21 detects that the vehicle has been parked (step S101-YES), the detection unit 21 detects whether the measurement results obtained from the sensor Se are fluctuating (step S102). Here, if the measurement value remains within a predetermined fluctuation range for a certain period of time or more, the detection unit 21 detects that there is no fluctuation (step S102-NO) and proceeds to step S101. Here, it is estimated that the vehicle is parked in a parking space, but there is no person around the parking space or inside the vehicle.

[0032] On the other hand, if the measurement value is not within the range of the fluctuation range, or if the state where the measurement value is within the range has not continued for a certain period of time or more, the detection unit 21 detects that there is a fluctuation (step S102-YES). The fluctuation range may be a value of the fluctuation range that can identify whether there is movement of a vehicle or a person or whether neither is moving, based on the range of fluctuation that occurs when there is movement of a vehicle or a person.

[0033] If a fluctuation is detected (step S102-YES), the detection unit 21 determines whether the fluctuation is large or not (step S103). Here, when a vehicle is detected to be in the parking lot, factors that can cause fluctuations in the measurement value include, for example, when a vehicle parked in a parking space is in the process of being removed, when the vehicle is stopped (parked) but a person inside the vehicle is moving, when a person inside the vehicle is not moving but is breathing, or when something that can move, such as a person, is moving outside the vehicle. Here, if the measurement value is within a predetermined range and the fluctuation of the measurement value is outside the predetermined fluctuation range (YES in step S103), the detection unit 21 detects that the vehicle is moving (in the process of being removed) (step S104). The fluctuation range may be determined based on fluctuations in the range corresponding to movements caused by human breathing, etc. Regarding the measurement value, fluctuations during the vehicle's entry or exit operation are greater than fluctuations in the range corresponding to movements caused by human breathing, etc.

[0034] Next, the detection unit 21 detects whether the measurement value corresponds to a vacant state reference value, which indicates an unoccupied and vacant state (step S105). The vacant state reference value is a reference value used to determine whether a parking space is vacant, i.e., no person is present in the parking space and no vehicle is parked there. Here, when a parking space is vacant (unoccupied), a reflected wave from the irradiated wave from the sensor Se is not returned, or a reflected wave reflected from the floor of the parking space or the wall behind the parking space is observed. Here, a measurement result obtained by the sensor Se when the monitored parking space is vacant and no person is parked there may be acquired in advance, and the acquired value may be stored in the storage device 30 as a vacant state reference value. When a measurement value corresponding to this vacant state reference value is obtained, it can be determined that the parking space is vacant and no person is present. When a measurement value different from the vacant state reference value is obtained, it can be determined that the parking space is vacant and no person is present. A different vacant state reference value may be stored for each unit U. That is, the measurement value measured in an empty parking space (when there is no vehicle in the parking space) differs depending on the environment around the parking space and the installation relationship between the parking space and the sensor Se.

[0035] Next, when the detection unit 21 detects that the measurement value from the sensor Se corresponds to an unmanned and empty state (step S105-YES), it detects that the vehicle has left the parking space (step S106). When the control unit 23 detects that the vehicle has left the parking space, it transmits status information indicating that the vehicle has transitioned to a leaving state to the display device installed in the parking space from which the leaving was detected (step S107). Then, the control unit 23 transitions the process to step S101 (step S108). When the display D receives status information indicating a transition to the unloading state from the control unit 23, the display D switches from displaying the receiving state to displaying the unloading state. For example, when the display D receives data indicating a transition to the unloading state from the control unit 23, the display D switches from displaying a red lamp to displaying a green lamp.

[0036] In step S105, if the measured value differs from the blank state reference value by a certain value or more, the detection unit 21 detects that the vehicle is not in an unmanned and empty state (step S105-NO). In this case, the control unit 23 determines that the vehicle is redoing an operation for leaving or entering the parking lot (step S111) and proceeds to step S101 (step S108). Here, it is estimated that the vehicle is temporarily stopped while, for example, the steering wheel is being turned back to leave the parking lot or to fine-tune the parking position of a vehicle that has entered the parking lot.

[0037] On the other hand, in step S103, if the measurement value is within the specified range and the fluctuation of the measurement value is within the predetermined fluctuation range (step S103-NO), the detection unit 21 detects the presence of a person and extracts vital data from the measurement value of the sensor Se (step S121). Next, the determination unit 22 determines whether or not the time elapsed since the vehicle was parked in the parking space is equal to or longer than X minutes, which is the third reference time (step S122). Here, the timing to start counting the time elapsed since the vehicle was parked is the timing at which parking is detected in step S205, which will be described later. Furthermore, X minutes, which is determined as the third reference time, may be determined based on the time from when parking is completed until the person in the vehicle completes disembarking from the vehicle. X minutes may be, for example, any value between 3 and 5 minutes.

[0038] If X minutes or more have not passed since the vehicle was parked (step S122-NO), the determination unit 22 determines that a person is in the process of getting out of the vehicle (step S151), and shifts the process to step S101 (step S108). On the other hand, if X minutes or more have passed since the vehicle was parked (YES in step S122), the determination unit 22 determines whether the time elapsed since the vital data was detected in step S121 is equal to or longer than the first reference time, Y minutes (step S123). The Y minutes determined as the first reference time may be determined according to the time a person is considered to be temporarily present near the vehicle, such as when a person gets on or off the vehicle, when a person passes near the vehicle, or when the person is a suspicious person (e.g., a vehicle burglar). In the case of a vehicle burglar, it is considered that the person rarely stays near the vehicle for a long period of time (e.g., 10 minutes or more), so it is estimated that the stay time is often relatively short. Furthermore, if a person stays for a period of time longer than the first reference time (Y minutes), it is estimated that the person may have been left in the vehicle. For example, if a person is left in the vehicle, it is considered that the time is between several tens of minutes and several hours. Therefore, for example, the first reference time (Y minutes) may be any value between 10 minutes and 15 minutes (for example, 10 minutes).

[0039] If the time elapsed since the vital data was detected is less than Y minutes (step S123-NO), the determination unit 22 reserves the determination (step S141) and moves the process to step S101 (step S108). Here, the determination unit 22 may store reserved data indicating that the determination has been reserved in the storage device 30.

[0040] On the other hand, if Y minutes or more have passed since the vital data was detected (step S123—YES), the determination unit 22 refers to the vital data acquired in step S121 and determines whether the vital data indicates an abnormality by determining whether the vital data exceeds a reference range for physical condition indicating a normal state (step S124). Here, the reference range for physical condition is a range for a normal state for at least one of the respiratory rate and the heart rate, which is stored in advance in the storage device 30. The determination unit 22 reads out the reference range for physical condition stored in the storage device 30 and determines whether the respiratory rate and the heart rate indicated by the vital data fall within the reference range. This determination may be made using at least one of the respiratory rate and the heart rate. Alternatively, the reference range for physical condition may be determined based on typical values ​​for a normal physical condition and psychological state. For example, when a person is in poor physical condition, at least one of the respiratory rate and the heart rate may increase or decrease. Furthermore, when a person is psychologically tense or stressed, at least one of the respiratory rate and the heart rate may increase.

[0041] If the respiration and heart rate indicated by the vital data are within the standard range for physical condition, the determination unit 22 determines that the vital data are not abnormal (step S124—NO) and transmits to the notification device 40 status information indicating a possible abandonment incident and the identification information of the parking space assigned to the determined target parking space (step S131). Here, the determination unit 22 may transmit the information to the notification device 40 of the management center that manages the parking lot P. Here, since the vital data does not indicate an abnormality, the person in the vehicle may be in good health. Therefore, the manager of the management center may actually observe the condition of the person in the vehicle and take necessary measures. For example, if the temperature around the vehicle is gradually rising, the temperature inside the vehicle may also rise. Therefore, the owner of the vehicle (e.g., the driver) may be called using the store's public address system. This allows the owner of the vehicle to confirm whether or not a person has been abandoned.

[0042] On the other hand, if the respiration and heart rate indicated by the vital data are not within the standard range for physical condition, the determination unit 22 determines that the vital data is abnormal (step S124—YES) and transmits to the notification device 40 status information indicating a possibility of abandonment and the identification information of the parking space assigned to the determined target parking space (step S125). Here, since the vital data indicates a value corresponding to an abnormality, the determination unit 22 may transmit the status information to both the notification device 40 of the management center managing the parking lot P and the notification device 40 of the fire department, or may transmit the status information to the notification device 40 of the fire department without transmitting it to the notification device 40 of the management center. Here, since the vital data indicates a value corresponding to an abnormality, it is possible that the person in the vehicle is ill, and by notifying the fire department, it is possible to promptly take action, such as arranging for an ambulance. Furthermore, when the notification device 40 is notified, the manager of the management center may use the in-store broadcasting equipment to call the vehicle owner and ask them to open the vehicle door.

[0043] On the other hand, in step S101, if the detection unit 21 detects that the vehicle is not parked (step S101-NO), the detection unit 21 detects whether the measurement value corresponds to a blank state reference value that represents an unoccupied and empty state (step S201). If the state is different from the unmanned and empty state (step S201-YES), the detection unit 21 proceeds to step S202, and if the state is unmanned and empty (step S201-NO), the detection unit 21 proceeds to step S101 (step S207).

[0044] In step S202, if the fluctuation of the measurement value falls outside the fluctuation range, the detection unit 21 detects that the amount of fluctuation is large (step S202-YES), and detects that a vehicle is present (step S203). Here, for example, the presence of a vehicle may be detected because the vehicle is moving from an aisle to a parking space. Then, when the detection unit 21 detects that the amount of fluctuation is large, the detection unit 21 determines whether the measurement value has stabilized (step S204), and if the measurement value has stabilized (step S204-YES), it detects that the vehicle has been parked (step S205). When the control unit 23 detects that the vehicle has been parked (entered), it transmits status information indicating that the vehicle has transitioned to an entered state (one parking space is full) to a display device installed in the parking space where the vehicle has been parked (step S206). The control unit 23 also counts the elapsed time from the time the vehicle was parked (entered). Then, the control unit 23 transitions the process to step S101 (step S207). When the display D receives status information indicating a transition to the storage state from the control unit 23, the display D switches from displaying the outgoing state to displaying the storage state. For example, when the display D receives data indicating a transition to the storage state from the control unit 23, the display D switches from a state in which a green lamp is lit to a state in which a red lamp is lit.

[0045] On the other hand, in step S204, if the measurement value is not stable (step S204-NO), that is, if the measurement value fluctuates, the detection unit 21 detects that the vehicle is in the process of parking (step S211). Here, it can be estimated that the vehicle is adjusting its position relative to the parking space while turning the steering wheel or the like in order to park. Then, the detection unit 21 shifts the process to step S101 (step S207).

[0046] On the other hand, in step S202, if the fluctuation in the measurement value is within the fluctuation range, the detection unit 21 detects that the amount of fluctuation is not large (step S202-NO), detects the presence of a person, and acquires vital data, which is the measurement result of the sensor Se (step S221). The determination unit 22 determines whether or not Y minutes or more have passed since the vital data was detected in step S221 (step S222). In step S222, if the determination unit 22 determines that vital data has not been detected continuously for Y minutes or more (step S222-NO), the determination unit 22 reserves the determination (step S241) and proceeds to step S101 (step S207). Here, the determination unit 22 may store reserved data indicating that the determination has been reserved in the storage device 30.

[0047] On the other hand, if it is determined in step S222 that Y minutes or more have elapsed since the vital data was detected (step S222-YES), the determination unit 22 determines whether the vital data indicates an abnormality by referring to the vital data acquired in step S221 and determining whether the vital data exceeds the standard range of physical condition indicating a normal state (step S223).

[0048] If the respiration and heart rate indicated by the vital data are within the standard range of physical condition, the determination unit 22 determines that the vital data is not abnormal (step S223—NO) and transmits to the notification device 40 of the management center status information indicating that a person has been staying near the parking space for a long time (e.g., Y minutes or more) and the identification information of the parking space assigned to the determined target parking space (step S231). Based on the notification content output from the notification device 40, the administrator of the management center can thereby determine that a person has been staying in the parking space for a long time even though no vehicle is parked there, and can take necessary measures. For example, the administrator can check the state of the parking space and wait for a while if the person is simply talking, or speak to the person if they appear to be in trouble, or take preventive measures if there is a possibility of a crime or the like developing.

[0049] On the other hand, if the respiration and heart rate indicated by the vital data are not within the standard range of physical condition, the determination unit 22 determines that the vital data is abnormal (step S223-YES), and transmits to the notification device 40 status information indicating the presence of a person whose vital data value is abnormal, and identification information of the parking space assigned to the determined target parking space (step S224). Here, since the vital data has a value corresponding to an abnormality, the determination unit 22 may transmit the information to at least one of the notification device 40 of the fire department or the notification device 40 of the police station, in addition to the notification device 40 of the management center that manages the parking lot P.

[0050] In this case, since the vital data corresponds to a value indicating an abnormality, it may be possible that there is a person near the parking space who is unable to move due to poor health or illness, or that a crime may be occurring or being committed. A person committing a crime may have an increased breathing rate or heart rate. In the case of a car break-in, the person stops moving when looking into the car, and vital data from which breathing and heart rate can be extracted can be obtained during this time. Therefore, when the vital data corresponds to a value indicating an abnormality, it may be possible that the person is poorly ill or ill, but it may also be possible that a crime has occurred. If a possible crime is reported to the police station's notification device 40, it is possible to quickly coordinate with the police and have them respond. If a possible illness or ill health is reported to the fire station's notification device 40, it is possible that an ambulance or other such action can be quickly taken.

[0051] 4 and 5, a case has been described in which processing is performed based on measurement results obtained from one sensor Se, but such processing may also be performed for each parking space installed in the parking lot P. This makes it possible to monitor the situation for each parking space even if there are multiple parking spaces in the parking lot P.

[0052] In the flowcharts of Figures 4 and 5 described above, the situation is monitored based on the measurement results obtained from one sensor Se, but the situation may also be monitored using the measurement results from multiple sensors Se. Fig. 6 is a flowchart for monitoring the situation using the measurement results of multiple sensors Se. When monitoring the situation using the measurement results of multiple sensors Se, the processes shown in Figs. 4 and 5 are also executed in parallel. The determination unit 22 refers to the storage device 30 and determines whether or not reserved data for which a determination was reserved in step S141 of Fig. 4 and step S241 of Fig. 5 is stored (step S301). If no reserved data is stored, it determines that a determination is not reserved (step S301-NO), and after a certain waiting time has elapsed, executes the process of step S301 again.

[0053] On the other hand, if the reserved data is stored, the determination unit 22 determines that the determination is reserved (step S301-YES) and determines whether or not the entry of a vehicle has been detected in a distant parking space (step S302). Here, the distant parking space is a parking space different from the parking space for which the reserved determination has been detected. Whether or not the parking space is different may be determined by referring to the identification information assigned to the sensor Se or the identification information assigned to the parking space, and determining whether or not the entry has been detected in a parking space assigned identification information different from the identification information assigned to the parking space for which the determination has been reserved. Furthermore, here, if the entry has been detected in the distant parking space, the determination unit 22 determines whether or not the entry occurred within a third reference time (e.g., X minutes) from the time the entry was detected.

[0054] If the vehicle enters a distant parking space and the entry timing is within the third reference time (step S302-YES), the determination unit 22 determines that the person for which the determination was suspended is a passerby (step S303), and releases the suspension by deleting the suspended data (step S304).Then, the determination unit 22 transitions the process to step S301 (step S305). Here, if a vehicle enters a distant parking space within X minutes, it is considered that the person has exited the entered vehicle and is moving toward the store, and therefore the person has been detected in a parking space different from the parking space where the entry was detected. Therefore, by determining that the person is a passerby and releasing the reserved data, it is possible to prevent notifications such as alerts from being issued for people who are considered to be passersby.

[0055] On the other hand, in step S302, if entry into a distant parking space is not detected, or if entry into a distant parking space is detected and the entry timing exceeds the third reference time (step S302-NO), the determination unit 22 determines whether or not a vehicle has been detected leaving the distant parking space (step S311).Furthermore, here, if exit from a distant parking space has been detected, the determination unit 22 determines whether or not the third reference time (for example, X minutes) has elapsed since the time the exit was detected.

[0056] If the vehicle leaves a distant parking space and the timing of the departure is within the third reference time since the suspension of the judgment (step S311-YES), the judgment unit 22 determines that the person whose judgment has been suspended is a passerby (step S312), and releases the suspension by deleting the suspended data (step S313).Then, the judgment unit 22 proceeds to step S301 (step S305). Here, if a vehicle is detected leaving a distant parking space within a third reference time (X minutes) based on the timing when a person is detected and the judgment is suspended, it can be estimated that the person got into the vehicle and left the parking space while the judgment was suspended. Therefore, by determining that the person whose judgment is suspended is a passerby and canceling the suspended data, it is possible to prevent notifications such as alerts from being issued for people who can be considered to be passersby.

[0057] On the other hand, if exit from a distant parking space is not detected, or if exit from a distant parking space is detected and the entry timing exceeds the third reference time (step S311-NO), the determination unit 22 determines whether vital data of the person for whom determination was suspended has been continuously measured by the same sensor Se for a second reference time (e.g., Z minutes) or more (step S321). Here, the second reference time (Z minutes) is set to a time shorter than Y minutes and longer than the time detected by passing through (e.g., 5 minutes). By using this second reference time, it becomes possible to distinguish whether the suspended person is a passerby or not. If the period during which the vital data of the person whose judgment has been suspended has been continuously measured by the same sensor Se is less than Z minutes (step S321-NO), the judgment unit 22 determines that the person whose judgment has been suspended is a passerby who is returning to the parking space to leave something behind or to place luggage in the vehicle (step S341), and releases the suspension by deleting the suspended data (step S342).Then, the judgment unit 22 proceeds to step S301 (step S305).

[0058] On the other hand, if the period during which vital data of a person for whom judgment has been suspended has been continuously measured by the same sensor Se has passed for more than Z minutes (step S321-YES), the judgment unit 22 determines that the person for whom judgment has been suspended may be a suspicious person, and determines whether the vital data indicates an abnormality by referring to the acquired vital data (step S322) and determining whether the vital data exceeds the standard range of physical condition (step S323).

[0059] If the respiration and heart rate indicated by the vital data are within the standard range of physical condition, the determination unit 22 determines that the vital data is not abnormal (step S323-NO), and transmits to the notification device 40 status information indicating that there may be a lost child or the like, and the identification information of the parking space assigned to the determined target parking space (step S331). Here, the determination unit 22 may transmit to the notification device 40 of the management center that manages the parking lot P. Here, because the vital data does not have a value indicating an abnormality, the person in the vehicle may be in good health, but may have become lost because they are unable to find the vehicle they are supposed to board or the person who came with them. The manager at the management center receives the notification from the notification device 40 and can check the status of the person in the parking space, thereby taking necessary measures.

[0060] On the other hand, if the respiration and heart rate indicated by the vital data are not within the standard range of physical condition, the determination unit 22 determines that the vital data is abnormal (step S323-YES), and transmits to the notification device 40 status information indicating the presence of a person whose vital data value is abnormal, and identification information of the parking space assigned to the determined target parking space (step S324). Here, since the vital data has a value corresponding to an abnormality, the determination unit 22 may transmit the information to the notification device 40 of the police station in addition to the notification device 40 of the management center that manages the parking lot P. Here, a person has been continuously detected for more than Z minutes when a vehicle has not entered or left the parking lot within X minutes, and their vital data indicates values ​​outside the standard range for physical condition. In this case, shortly after a vehicle has entered or left the parking lot, there is a possibility that a person who got in or out of the vehicle may remain in the parking lot P, but after a certain amount of time has passed, there is a high possibility that the person will disappear. Therefore, car break-ins and the like are likely to occur in a short period of time when there are no people around, and since there may be an increase in breathing rate or heart rate at the time of the crime, it is possible to report the possibility of a crime.

[0061] FIG. 7 is a plan view showing a part of the parking lot P shown in FIG. The first state represents a state in which a vehicle V10 carrying a person L10 has entered the parking space PS1a10. The determination device 20 detects the entry state based on the detection result of the sensor Se1a10. The second state represents the state several minutes after the first state, in which entry is detected based on the detection result of Se1a10, and represents the state in which person L10 who has gotten out of vehicle V10 is detected by sensor Se1a3. Here, when entry is detected based on the measurement results of any of the sensors Se, if a person is detected within X minutes from the time entry was detected, the detected person is determined to be a passerby. For example, even if person L10 is detected by sensor Se1a3 at time tc1, the data indicating that person L10 was detected at time tc1 may be deleted (reset). As a result, no notification is sent to the notification device 40. Here, after entry is completed, person L10, who was in vehicle V10, is likely to get off and move to the store entrance, so the person can be determined to be a passerby. Furthermore, with respect to the entrance of the store, the sensors further back than the sensor Se1a10 that detected the vehicle entering the parking lot are in locations that do not belong to the area between the entrance and the store entrance. If a person is detected by such a sensor further back, the detection result is not deleted but is left in place, so that the situation of people remaining in the parking lot can be continuously monitored.

[0062] FIG. 8 is a plan view showing a part of the parking lot P shown in FIG. In the first state, person L10 is moving from the entrance of the store toward parking space PS1a10 where his / her vehicle V10 is parked and is detected by sensor Se1a9. Person L20 is moving from the entrance of the store toward parking space PS1a6 where his / her vehicle V6 is parked and is detected by sensor Se1a3. Here, based on the measurement results of sensors Se1a1 to Se1a8 installed along the passage from near the store entrance to parking space PS1a10, person L10 is detected at the time person L10 passes by, and judgment is reserved, and person L10 is detected by sensor Se1a9. For example, person L10 is detected by sensor Se1a1 at time ta1 and judgment is reserved, detected by sensor Se1a2 at time tb1 and judgment is reserved, and similarly, person L10 is detected by sensor Se1a8 at time th1 and judgment is reserved, and person L10 is detected by sensor Se1a9. Furthermore, after person L10 arrives at the parking lot P, person L20 arrives at the parking lot P and is detected by sensor Se1a1 at time ta2, with judgment pending, and is detected by sensor Se1a2 at time tb2, with judgment pending, and person L20 is detected by sensor Se1a3.

[0063] Here, persons L10 and L20 are detected at a stage where the vehicle has not entered or left the parking lot within X minutes, and the judgment is reserved, so no notification is made.

[0064] Next, the second state represents a state several minutes after the first state. In the second state, person L10 is detected to be near parking space PS1a10 based on the detection result of sensor Se1a10, and person L20 gets into vehicle V6 and causes vehicle V6 to exit parking space PS1a6. Also, in the first state, the sensor Se1a6 detected that the vehicle V6 was parked in the parking space PS1a6, but in the second state, the sensor Se1a6 detected that the vehicle V6 was leaving the parking space PS1a6. Here, judgments were pending for each sensor Se (sensor Se1a1, sensor Se1a2, sensor Se1a3, sensor Se1a4) on the route from parking space PS1a6, where the exit was detected, to the store entrance / exit, but the exit of vehicle V6 is detected as vehicle V6 leaves parking space PS1a6. With this detection of the exit, the pending judgments at times ta1, ta2, ta3, and ta4 based on the measurement results of sensors Se1a1, Se1a2, Se1a3, and Se1a4 are released. Here, with the detection of the exit, the oldest pending judgment is released, and judgments that were later pending (for example, times ta2, tb2, tc2, and td2) are maintained and not released. Furthermore, for cases where a determination is suspended based on the results of measurements by sensors (sensor Se1a8, etc.) further back than sensor Se1a6, which detected the vehicle's exit from the store entrance / exit, the location is not between the exit location and the store entrance / exit, so even if the determination is released at time ta1, etc., the determination that was detected and suspended at time th1, etc. is not released. Here, by maintaining the suspension of determination for locations that are not between the exit location and the store entrance / exit, it is possible to continue monitoring the situation of people who remain in the parking lot, such as person L10. Here, even if a correspondence is not established between the timing at which a person is detected and the person who actually exited the parking lot, the detection timing of person L10 and person L20 is not significantly different, so monitoring can continue despite the timing of the determination being delayed.

[0065] FIG. 9 is a plan view showing a state after the person L20 has boarded the vehicle and left the parking lot P from the second state shown in FIG. Here, person L10 is detected by Se1a12 near parking space PS1a12. Among the people whose reservation has not been released, there is one that was detected at the earliest time ta2 and whose judgment was suspended. However, if a first reference time (Y minutes) or more has passed since time ta2 and the person has been detected based on the measurement results of any of sensors Se for more than a second reference time (e.g., Z minutes), the person is deemed to be a suspicious person and a notification is sent to notification device 40. If person L10 returns to the store from near parking space PS1a12, even if a first reference time (Y minutes) or more has passed since time ta2, the person will not be detected by any of sensors Se. In this case, the suspension of judgment is released and a notification is not sent.

[0066] FIG. 10 is a plan view showing a part of the parking lot P shown in FIG. In addition, in this figure, a case where a vehicle entering the garage and a case where a vehicle leaving the garage are detected will be described. 10, a person L10 gets into a vehicle V10 and parks the vehicle V10 in a parking space PS1a10. The entry of the vehicle V10 is detected by a sensor Se1a10. After vehicle V10 enters the store, person L20 moves from the store entrance to the vicinity of parking space PS1a3 and is detected by sensor Se1a3. Person L20 is detected by sensor Se1a1 at time ta1, by sensor Se1a2 at time tb1, and by sensor Se1a3 at time tc1.

[0067] 10 shows a state several minutes after the state 1. A person L10 gets off the vehicle V10 and moves toward the entrance of the store, and is detected by the sensor Se1a3 at time tc2. A person L20 gets into a vehicle V20 and leaves the parking space PS1a6, and the leaving is detected by a sensor Se1a6. Here, since the entry of vehicle V10 was detected in the first state, even if a person is detected after the entry in the second state, the detection result is invalid (not monitored). Here, as the entry is detected, the detection result detected by sensor Se1a1 at time ta1 and the detection result detected by sensor Se1a2 at time tb1, which were detected during the period from the timing of the entry detection until X minutes, which is the third reference time, have elapsed, are deleted. Furthermore, as the exit of the vehicle V20 from the parking space PS1a6 is detected, one observation value (for example, the detection result that the person L10 is detected by the sensor Se1a3 at the time tc2) is canceled.

[0068] According to the embodiment described above, it is possible to detect whether a person has been left in a vehicle parked in a parking lot and to report this to the manager or the like, so that it is possible to know that a person has been left behind and take the necessary measures. This makes it possible to prevent the person from being left behind for a long time, which could lead to the person's health deteriorating or even a fatal accident. In particular, if a person is left behind in the summer, the temperature inside the vehicle rises and they are more likely to become ill (for example, heat stroke), so it is possible to discover and avoid the person being left behind at an early stage. Furthermore, vital signs data obtained by the sensor Se are used to detect whether or not a person is suspicious and to notify a manager, etc., so that the suspicious person's condition can be confirmed and necessary measures can be taken. This makes it possible to avoid crimes such as car break-ins. Also, even if a person is lost, they can be found early and necessary measures can be taken. In this way, it is possible to monitor for abandoned items and suspicious people in the parking lot, so the situation can be monitored using the situation monitoring system without having to secure manpower such as a monitor who patrols the parking lot and monitors it.

[0069] Furthermore, according to the above-described embodiment, the sensor Se can not only detect a person but also detect whether a vehicle is parked in a parking space. This makes it possible to monitor various conditions from the detection results of a single sensor Se, without installing multiple types of sensors.

[0070] In the above-described embodiment, whether a parking space is vacant or full is displayed by a display provided for each parking space, but the vacant / full status of each parking space may also be displayed on a display device at the entrance to the parking lot. Also, the vacant / full status of parking lot P may be made public so that it can be viewed from a terminal device via a network such as the Internet. In the above embodiment, the sensor Se is a radar, but it may also be a camera, a sonic sensor, or the like. In addition, the sound of a vehicle parked in a parking space may be collected, and based on whether the collected sound includes the sound of the engine being on, it may be possible to monitor whether the engine is left running. In addition, the presence of a person moving through an aisle or the like within the parking lot P may be displayed so that drivers of vehicles moving through the parking lot P can recognize it.

[0071] The control device 10 and the determination device 20 in the above-described embodiments may be implemented by a computer. In this case, a program for implementing the functions may be recorded on a computer-readable recording medium, and the program may be loaded into a computer system and executed. Note that the term "computer system" as used herein includes hardware such as an OS and peripheral devices. Furthermore, the term "computer-readable recording medium" refers to portable media such as flexible disks, optical magnetic disks, ROMs, and CD-ROMs, as well as storage devices such as hard disks built into a computer system. Furthermore, the term "computer-readable recording medium" may also include devices that dynamically store programs for a short period of time, such as communication lines used when transmitting programs via networks such as the Internet or telephone lines, or devices that store programs for a fixed period of time, such as volatile memory within a computer system that serves as a server or client. The program may be for implementing only a portion of the functions described above, or may be capable of implementing the functions in combination with a program already stored in the computer system, or may be implemented using a programmable logic device such as an FPGA (Field Programmable Gate Array).

[0072] Although an embodiment of the present invention has been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and includes designs within the scope of the gist of the present invention. [Explanation of symbols]

[0073] 10 Control device 20 Judgment device 21 Detection unit 22 Judgment section 23 Control Unit 30 Storage device 40 Notification device B,Ba materials D,D1,D1a1,D2 Display K aisle L,L10,L20 People P Parking Lot PS1, PS1a10, PS1a12, PS1a3, PS1a4, PS1a6 Parking Spaces PS1a1, PS2a1, PS1b1, PS2b1 Parking space row S Parking Lot Surveillance System Se,Se1,Se1a1,Se1a10,Se1a11,Se1a12,Se1a2,Se1a3,Se1a4,Se1a6,Se1a8,Se1a9,Se1b1,Se2,Se2a1,Se2b1,Se3,Se4,Se5,Se6,Se7,Se8 U Unit V,V6,V10,V20 Vehicle

Claims

1. a sensor that irradiates radio waves onto a parking space in a parking lot and receives the reflected waves to measure the status of the parking space; a detection unit that detects whether or not data representing biological activity is included in the measurement results of the sensor; a determination unit that determines whether or not there is a possibility of an abnormality occurring based on the detection result of the detection unit; A parking lot monitoring system having:

2. The detection unit detecting whether data representing the biological activity is included and whether a vehicle is present in the parking space; The determination unit When the presence of a vehicle in the parking space is detected and the period during which the data representing the biological activity is detected is equal to or longer than a first reference time, it is determined that there is a possibility that a person has been left in the vehicle. The parking lot monitoring system of claim 1 .

3. The detection unit detecting whether data representing the biological activity is included and whether a vehicle is present in the parking space; The determination unit When the presence of a vehicle in the parking space is detected and the period during which the data representing the biological activity is detected is equal to or longer than a first reference time, it is determined that there is a possibility that a person has been left in the vehicle. The parking lot monitoring system of claim 1 .

4. The sensor When a vehicle enters the parking space, the measurement is performed by receiving radio waves that reach the interior of the vehicle through the windshield or rear window of the vehicle and are reflected therefrom, The determination unit If a period during which the data representing the biological activity is detected is equal to or longer than a first reference time after it is detected that a vehicle has entered the parking space, it is determined that there is a possibility that a person has been left in the vehicle. The parking lot monitoring system of claim 3.

5. The determination unit When the presence of a vehicle in the parking space is detected and the period during which the data representing the biological activity is detected is less than a first reference time and is equal to or longer than a second reference time that is shorter than the first reference time, it is determined that there is a possibility that a person who needs to be confirmed is present near the vehicle. The parking lot monitoring system of claim 3.

6. The determination unit Vital data including at least one of respiration and heart rate is acquired from the data representing the biological activity, and if the acquired vital data is within a range representing abnormality, it is determined that the person requiring confirmation may be a suspicious person.

6. The parking lot monitoring system of claim 5.

7. a plurality of sensors are provided in the parking lot so that the measurement target areas are different; The determination unit After a first sensor among the plurality of sensors detects a vehicle entering or leaving a parking space, When a period during which data representing biological activity is detected by at least one of the remaining sensors different from the first sensor is equal to or longer than a third reference time, Determining that the person requiring confirmation may be lost 6. The parking lot monitoring system of claim 5.

8. 1. A computer-implemented method for parking lot monitoring, comprising: A sensor measures the status of a parking space in a parking lot by irradiating the parking space with radio waves and receiving the reflected waves. Detecting whether or not the measurement results of the sensor include data representing biological activity; Based on the detected result, it is determined whether or not there is a possibility of an abnormality occurring. A parking lot monitoring method comprising:

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