JP2017215786A - Determination device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a determination device capable of determining a parking state of a vehicle, and determining an abnormal state such as a state in which foreign matter is present.SOLUTION: A determination unit 14 is configured to determine a parking state of a vehicle and an abnormal state on the basis of detection results of a vehicle detection coil 11 and a noise coil 12. Using the detection result of the noise coil 12 whose magnetic flux is smaller than that of the vehicle detection coil 11 allows a user to determine that an object (for example, foreign matter such as an empty can) smaller than the vehicle is present in a parking lot. Consequently, since the abnormal state in which foreign matter, for example, is present can be determined, with a plurality of coils, a parking state of a vehicle as well as an abnormal state can be determined.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an apparatus for determining receipt of a vehicle.

  Conventionally, there is a technique for detecting whether or not a vehicle has entered a parking lot using a plurality of coils (see, for example, Patent Document 1). Since a certain magnetic flux can be detected by using a plurality of coils, it can be detected whether or not the vehicle has entered.

Special table 2011-522319 gazette

  By the way, if a foreign object (for example, an empty can) is arranged in the parking lot, the magnetic flux changes, so that it is erroneously detected that the vehicle has entered although the vehicle has not been received. is there.

  The present invention has been made in view of the above, and an object of the present invention is to provide a determination device that can determine an incoming state of a vehicle and determine an abnormal state such as a foreign object being disposed.

  The determination device according to the present invention includes a first coil that is a coil for detecting a vehicle entering the parking lot and a coil for detecting an abnormal state so that the magnetic flux is smaller than that of the first coil. A second coil that is a coil configured as described above, and a determination unit that determines a warehousing state and an abnormal state of the vehicle based on detection results of the first coil and the second coil.

  According to this invention, since the detection result of the second coil whose magnetic flux is smaller than that of the first coil is used, it can be determined that an object smaller than the vehicle (for example, a foreign object such as an empty can) is arranged in the parking lot. As described above, since an abnormal state such as the presence of a foreign object can be determined, it is possible to determine the storage state of the vehicle and to determine the abnormal state using a plurality of coils.

  Further, in this determination device, the first coil is a loop coil that forms a predetermined first loop shape, and the second coil has an outer peripheral side of the second loop shape formed along the first loop shape. In addition, it may be a loop coil that is folded inward to form an inner circumference of the second loop shape at a predetermined folding point.

  According to this invention, an empty space (a space for accommodating a battery or the like) can be provided.

  Moreover, in this determination apparatus, the second coil is a plurality of coils arranged within the inner circumference of the first coil, and the determination means uses the detection result of the plurality of coils as the detection result of the second coil. May be used.

  According to the present invention, since the abnormal state is determined based on the amount of change of each of the plurality of coils, the abnormal state is determined more accurately than in the case of determining based on the amount of change of one second coil. can do.

  Further, in this determination device, the detection result of the first coil and the second coil at the first timing and the detection result of the first coil or the second coil at the second timing after the first timing. Based on this, the warehousing state and abnormal state of the vehicle may be determined.

  According to the present invention, since the warehousing state and the abnormal state of the vehicle are determined using the detection results of a plurality of timings, it can be appropriately determined in consideration of the influence of the vehicle height of the warehousing vehicle and the climatic conditions. .

  The determination apparatus may further include current value control means for changing a current value to be sent to the first coil or the second coil after the first timing and before the second timing. .

  According to the present invention, by changing the current value, the measurement is performed with the timing and conditions measured first being changed, so that the warehousing state and the abnormal state of the vehicle can be more accurately determined.

  The determination apparatus may further include a detection unit that detects temperature or humidity, and the determination unit may further determine the warehousing state and the abnormal state of the vehicle by further using a detection result by the detection unit.

  According to this invention, since the warehousing state and the abnormal state of the vehicle are determined by further using the detection result of the temperature or humidity (for example, the amount of change in temperature or humidity), the determination is accurately performed in consideration of the influence of the temperature or humidity. can do.

  ADVANTAGE OF THE INVENTION According to this invention, while determining the warehousing state of a vehicle, it can determine abnormal states, such as a foreign material being arrange | positioned.

1 is a block diagram of a determination apparatus 10 according to an embodiment of the present invention. 2 is a diagram illustrating a hardware configuration of a determination apparatus 10. FIG. It is a figure which shows the example of the shape of the vehicle detection coil 11 and the noise coil 12. FIG. It is a figure which shows the relationship between the parking state of a vehicle and a coil. It is a flowchart which shows the process which determines a parking state and an abnormal state. It is a figure which shows the noise coil in 2nd Embodiment. It is a figure which shows the relationship between the parking state of a vehicle and the coil in 2nd Embodiment. It is a flowchart which shows the process determined using the coil in 2nd Embodiment. It is a flowchart which shows the process which lowers | reduces an electric current value and determines again. It is a flowchart which shows the process which raises an electric current value and determines again. It is a block diagram which shows 10 A of determination apparatuses which concern on 4th Embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or equivalent elements will be denoted by the same reference numerals, and redundant description will be omitted.

[First embodiment]
FIG. 1 is a system configuration diagram illustrating a system configuration of a parking lot management system including a determination device 10 (determination device) and a parking lot management server 30.

  This parking lot management system is a system for managing the parking state of a vehicle. The determination apparatus 10 is an apparatus for detecting the presence / absence of parking of a vehicle, which is arranged in a parking lot. For example, it is composed of a loop coil or the like. The determination device 10 determines whether or not the vehicle is parked in the parking lot (the state of entering the vehicle) and determines whether or not the vehicle is in an abnormal state. The abnormal state refers to a state where the warehousing state cannot be properly determined, such as a foreign matter (noise) such as an empty can being arranged in the parking lot.

  In this determination device 10, a vehicle room ID indicating a vehicle room number is assigned to each vehicle space. When the determination device 10 detects a vehicle parked in the passenger compartment, it can notify the parking management server 30 of parking (including the passenger compartment ID) via a GW (Gate Way) device 20. .

  The parking lot management server 30 receives the above-mentioned notification that there is parking from the GW device 20, and stores the notification content.

  The determination device 10 includes a vehicle detection coil 11 (first coil), a noise coil 12 (second coil), a control circuit 13 (current value control means), a determination unit 14 (determination means), a battery 15, And a communication unit 16. The determination device 10 has a hardware configuration as shown in FIG.

  FIG. 2 is a hardware configuration diagram of the determination apparatus 10. As shown in FIG. 2, the determination apparatus 10 shown in FIG. 1 physically includes one or a plurality of CPUs 101, a RAM 102 and a ROM 103 that are main storage devices, and a communication module 104 that is a data transmission / reception device such as a network card. , A system including an auxiliary storage device 105 such as a hard disk or a semiconductor memory, a control circuit 13, and a coil 106. The functions of the determination apparatus 10 shown in FIG. 1 are such that the communication module 104 is controlled under the control of the CPU 101 and the control circuit 13 by loading predetermined computer software on the hardware such as the CPU 101 and the RAM 102 shown in FIG. This is realized by operating and reading and writing data in the RAM 102 and the auxiliary storage device 105. Hereinafter, each functional block will be described based on the functional blocks of the determination apparatus 10 illustrated in FIG. 1.

  The vehicle detection coil 11 is a coil for detecting a vehicle, and is, for example, a loop coil that forms a predetermined loop shape (first loop shape) connected to the control circuit 13. The vehicle detection coil 11 generates a magnetic flux by conducting an electric signal from the control circuit 13.

  The noise coil 12 is a coil for detecting an abnormal state, for example, a loop coil connected to the control circuit 13. Similar to the vehicle detection coil 11, the noise coil 12 generates a magnetic flux by conducting an electrical signal from the control circuit 13.

  The noise coil 12 is configured such that the area (area of the region surrounded by the coil) is smaller than the area of the vehicle detection coil 11. FIG. 3 shows a plan view of the vehicle detection coil 11 and the noise coil 12. FIG. 3A shows a plan view of the vehicle detection coil 11, and FIG. 3B shows a plan view of the noise coil 12. The noise coil 12 shown in FIG. 3 (B) has an outer peripheral side of the loop shape (second loop shape) of the noise coil 12 formed along the shape of the vehicle detection coil 11 (first loop shape). It is a loop coil that folds inward to form a loop-shaped inner circumference of the noise coil 12 at a predetermined folding point (point P1). Here, the term “along” includes not only the state of being parallel but also a state of being slightly inclined from parallel. In the present embodiment, the turning point is a point where the outer peripheral side of the noise coil 12 has made one round along the vehicle detection coil 11, but is not limited to this, and at least can generate magnetic flux. Any size is acceptable. For example, you may make it return | fold at the time of the outer periphery side making at least a half turn. In this case, you may make it use the two noise coils 12 folded back | folded at the time of a half circumference. Further, as shown in FIG. 3C, four noise coils 12 may be used which are turned back at the time of a quarter turn or more. A specific example using a plurality of noise coils 12 will be described in the second embodiment.

  As shown in FIG. 3B, the noise coil 12 has a hollow portion, so that the area is smaller than that of the vehicle detection coil 11. The vehicle detection coil 11 is substantially circular except for a connection portion with the control circuit 13, but the circular portion may be rectangular. For example, the shape of the vehicle detection coil 11 and the noise coil 12 other than the connection portion may be a square or a triangle. Moreover, shapes other than the said connection part in the vehicle detection coil 11 and the noise coil 12 may take the same shape mutually. The vehicle detection coil 11 is installed on the surface of a base (for example, the base constituting the control circuit 13), and the noise coil 12 is installed on the back of the base. In addition, the noise coil 12 may be installed on the surface of the substrate, and the vehicle detection coil 11 may be installed on the surface of the substrate. Thus, the vehicle detection coil 11 and the noise coil 12 are installed at substantially the same height. In FIG. 1, the vehicle detection coil 11 for convenience is described larger than the noise coil 12, but is assumed to be substantially the same size as shown in FIG. 3.

  As described above, since the area of the noise coil 12 is smaller than that of the vehicle detection coil 11, the magnetic flux MF2 of the noise coil 12 is smaller than the magnetic flux MF1 of the vehicle detection coil 11, as shown in FIG. That is, the noise coil 12 is configured such that the magnetic flux is smaller than that of the vehicle detection coil 11. FIG. 4A shows the state of an empty vehicle.

  As shown in FIG. 4B, when the vehicle 40 enters, the magnetic flux MF1 generated by the vehicle detection coil 11 is affected by the arrival of the vehicle 40 (the resonance frequency changes due to the disturbance of the magnetic flux MF1 and the inductance changing). However, since the magnetic flux MF2 by the noise coil 12 does not reach the vehicle 40, it is not affected by the arrival of the vehicle 40. On the other hand, when an empty can or the like is placed in the parking lot, the magnetic flux MF2 generated by the noise coil 12 is a magnetic flux that reaches a small object such as an empty can, and thus is affected by the empty can. Further, the magnetic flux MF1 generated by the vehicle detection coil 11 is also affected by the empty can.

  The control circuit 13 is a part that conducts an electric signal having a predetermined current value to the vehicle detection coil 11 and the noise coil 12. The control circuit 13 is a circuit (for example, an oscillation circuit) that can change the current value of the electric signal by mounting a variable resistor. The control circuit 13 changes the current value according to the notification from the determination unit 14.

  The determination unit 14 is a part that determines the warehousing state and the abnormal state of the vehicle based on the detection results of the vehicle detection coil 11 and the noise coil 12. Specifically, the determination part 14 is comprised by the magnetic detection element etc. which can detect the magnetic flux of the vehicle detection coil 11 and the noise coil 12, respectively. The determination unit 14 calculates the amount of change in magnetic flux due to the vehicle detection coil 11 and the amount of change in magnetic flux due to the noise coil 12. The determination unit 14 determines that there is a change in the vehicle detection coil 11 when the amount of change by the vehicle detection coil 11 is greater than or equal to a predetermined threshold value for the change in the magnetic flux of the vehicle detection coil. Moreover, the determination part 14 determines with the noise coil 12 having a change, when the variation | change_quantity of the magnetic flux of the noise coil 12 is more than the predetermined threshold value of the variation | change_quantity of the magnetic flux of the noise coil.

  As described above, the amount of magnetic flux of the vehicle detection coil 11 changes when the vehicle 40 is parked, and the amount of magnetic flux of the noise coil 12 does not change even when the vehicle 40 is parked. If the noise coil 12 does not change, it is determined that the vehicle 40 is parked. Moreover, the determination part 14 determines with the foreign material being arrange | positioned, when the vehicle detection coil 11 has a change and the noise coil 12 has a change. This is because the amount of magnetic flux of the noise coil 12 changes when a foreign object is placed around the noise coil 12. When there is no change in the vehicle detection coil 11 and no change in the noise coil 12, the determination unit 14 determines that there is no change (the vehicle is not in stock and is not in an abnormal state). If there is no change in the vehicle detection coil 11 and there is a change in the noise coil 12, the determination unit 14 determines that there is a failure (the noise coil 12 is not operating normally).

  If the determination part 14 determines as mentioned above, it will transmit preset vehicle interior ID and the determination result to the communication part 16. FIG.

  The battery 15 is a battery that operates the control circuit 13 and the like. The communication unit 16 is a part that communicates with the parking lot management server 30 via the GW device 20. Specifically, the communication unit 16 transmits the determination result acquired from the determination unit 14 and the vehicle room ID to the parking lot management server 30.

  Next, a processing procedure executed by the determination apparatus 10 will be described using the flowchart of FIG. The flowchart shown in FIG. 5 is a process for determining the warehousing state and the abnormal state of the vehicle based on the detection results of the vehicle detection coil 11 and the noise coil 12.

  First, the determination unit 14 calculates the amount of change in magnetic flux of the vehicle detection coil 11 and the noise coil 12 (step S1). The determination unit 14 is in an abnormal state (for example, a state in which foreign matter is disposed) when the vehicle detection coil 11 has changed (step S2: YES) and the noise coil 12 has changed (step S3: YES). (Step S4). If there is a change in the vehicle detection coil 11 (step S2: YES) and there is no change in the noise coil 12 (step S3: NO), the determination unit 14 determines that the vehicle is stored (step S5). When there is no change in the vehicle detection coil 11 (step S2: NO) and there is a change in the noise coil 12 (step S6: YES), the determination unit 14 determines that the state is abnormal (for example, failure) (step S7). ). If there is no change in the vehicle detection coil 11 (step S2: NO) and the noise coil 12 does not change (step S6: NO), the determination unit 14 determines that there is no change (step S8).

  Then, the effect by 1st Embodiment is demonstrated. The determination unit 14 determines the warehousing state and the abnormal state of the vehicle based on the detection results of the vehicle detection coil 11 and the noise coil 12. Since the detection result of the noise coil 12 whose magnetic flux is smaller than that of the vehicle detection coil 11 is used, it can be determined that an object smaller than the vehicle (for example, a foreign object such as an empty can) is arranged in the parking lot. As described above, since an abnormal state such as the presence of a foreign object can be determined, it is possible to determine the storage state of the vehicle and to determine the abnormal state using a plurality of coils.

  The noise coil 12 is a loop coil in which the outer peripheral side of the noise coil 12 is formed along the inner peripheral portion of the vehicle detection coil 11 and is folded inward to form the inner periphery of the noise coil 12 at a predetermined folding point. is there. In this case, an empty space (a space for accommodating the battery 15 or the like) can be provided. Therefore, components for the determination device 10 can be arranged in the empty space, and the size can be reduced. Further, as described above, the vehicle detection coil 11 and the noise coil 12 can be set to substantially the same height.

[Second Embodiment]
In the above-described embodiment, the case where one noise coil 12 is used has been described, but an example using a plurality of noise coils 12 will be described. For example, as shown in FIGS. 6A and 6B, a plurality of noise coils 12 (noise coils 12 </ b> A to 12 </ b> D) are configured within the inner peripheral range of the vehicle detection coil 11. In the second embodiment, the vehicle detection coil 11 and the noise coil 12 may be provided on the front and back of the board, respectively, or the vehicle detection coil 11 and the noise coil 12 may be provided on either side of the board. The shape of these noise coils 12 may be elliptical as shown in FIG. 6A, rectangular (rectangular) or triangular as shown in FIG. 6B. In addition, the connection part to the control circuit 13 of each noise coil 12 is abbreviate | omitted. Further, as described in the first embodiment, two noise coils 12 may be used that fold back when they make a half turn along the vehicle detection coil 11, or the noise coils 12 that turn back when ¼ turn may be used. Four may be used.

  FIG. 7 shows the state of the parking lot. As shown in FIG. 7A, when the vehicle 40 is not parked, it is determined that there is no change because neither the vehicle detection coil 11 nor the noise coil 12 has the amount of change in magnetic flux. On the other hand, as shown in FIG. 7B, when the vehicle 40 is parked and an empty can 50 is disposed in the vicinity of the noise coil 12A, the determination unit 14 includes the vehicle detection coil 11 and the noise coil 12A. It is determined that there is a change. That is, the determination unit 14 determines that only one noise coil 12 among the plurality of noise coils 12 has changed, and thus determines that a foreign object is disposed.

  Next, a process for more accurately determining an abnormal state using a plurality of noise coils 12 will be described using the flowchart of FIG. It is assumed that six noise coils 12 are arranged in the inner peripheral range of the vehicle detection coil 11.

  As a result of calculating the amount of change in the magnetic flux of all the noise coils 12, the determination unit 14 determines that there is no abnormal state when there is no change in all the noise coils 12 (step S11: YES) (step S12). If there is a change in at least one noise coil 12 (step S11: NO), the process proceeds to step S13. When there is a change in one noise coil 12 (step S13: YES), it is determined that a foreign object such as an empty can is disposed, and it is determined that there is a foreign object (step S14). This is because when there is a change in the whole of the plurality of noise coils 12, the noise coil 12 itself may be out of order, but when there are changes in a small number of noise coils 12, foreign matter is arranged. It is because it is thought that it is not too much. When there is a change in the plurality of noise coils 12 (step S13: NO), the process proceeds to step S15. When there is a change in two or three noise coils 12 (step S15: YES), the amount of change in the magnetic flux of all the noise coils 12 is calculated again after a certain period (for example, 5 to 10 minutes) has elapsed. When it is determined that there is no change in all the noise coils 12 (returned to the steady value) based on the calculated result (step S16: YES), the determination unit 14 determines that there is no abnormal state (step S17). This is because it is considered that a part of the noise coil 12 was exposed to direct sunlight. On the other hand, after a certain period of time, the amount of change in the magnetic flux of all the noise coils 12 is calculated again. As a result of the calculation, when there are changes in the plurality of coils (step S16: NO), the determination unit 14 determines that there is a foreign object (step S18).

  If there is a change in the majority of the noise coils 12 (step S15: NO), the amount of change in the magnetic flux of all the noise coils 12 is calculated again after a certain period of time has elapsed. When it is determined that there is no change in all the noise coils 12 (returned to the steady value) based on the calculated result (step S19: YES), the determination unit 14 determines that there is no abnormal state (step S20). This is because the magnetic flux is considered to have temporarily changed due to weather factors such as rain. On the other hand, after a certain period of time, the amount of change in the magnetic flux of all the noise coils 12 is calculated again. As a result of the calculation, when the majority of the noise coils 12 are changed (step S19: NO), the determination unit 14 determines that there is a failure (step S21).

  According to the determination device 10 according to the second embodiment, the noise coil 12 is a plurality of coils arranged within the inner circumference of the vehicle detection coil 11, and the determination unit 14 obtains the detection results of the plurality of coils. Use to determine. Since the abnormal state is determined based on the amount of change in magnetic flux of each of the plurality of noise coils 12, the abnormal state is determined more accurately than in the case of determining based on the amount of change in magnetic flux of one noise coil 12. can do.

[Third embodiment]
In the third embodiment, the current value is changed after once determining changes in the vehicle detection coil 11 and the noise coil 12 at a predetermined timing (first timing), and the timing after the change (second timing). An example of re-determining a change in the vehicle detection coil 11 or the noise coil 12 will be described. First, a process when it is determined that there is a change in the vehicle detection coil 11 and there is a change in the noise coil 12 will be described with reference to a flowchart shown in FIG.

  When the determination unit 14 determines that there is a change in the vehicle detection coil 11 and determines that there is a change in the noise coil 12, the determination unit 14 notifies the control circuit 13 that the current value is decreased. In response to this, the control circuit 13 decreases the current value of the noise coil 12 (step S31). The determination unit 14 calculates the amount of change in the magnetic flux of the noise coil 12 after a certain period of time has elapsed since the notification (after the current value has decreased), and the noise coil 12 is changed (step S32). : YES), it is determined as an abnormal state (for example, a foreign object due to mischief or the like is disposed) (step S33). On the other hand, when there is no change in the noise coil 12 (step S32: NO), it is determined that the vehicle 40 (for example, a vehicle with a low vehicle height) has been received (step S34).

  Next, processing when it is determined that there is no change in the vehicle detection coil 11 and there is no change in the noise coil 12 will be described using the flowchart shown in FIG. Here, “no change” means that the change does not reach the threshold value.

  When the determination unit 14 determines that there is no change in the vehicle detection coil 11 and determines that there is no change in the noise coil 12, the determination unit 14 notifies the control circuit 13 that the current value of the vehicle detection coil 11 is increased. In response to this, the control circuit 13 increases the current value of the vehicle detection coil 11 (step S41). The determination unit 14 calculates the amount of change in the magnetic flux of the vehicle detection coil 11 after a certain period of time has elapsed after the notification (after the current value has increased), and the vehicle detection coil 11 has a change ( Step S42: YES), it is determined that the vehicle 40 (vehicle with a high vehicle height) has been received (step S43). On the other hand, when there is no change in the vehicle detection coil 11 (step S42: NO), it is determined that there is no change (step S44). This is because it is considered that the magnetic flux changes due to environmental factors (for example, temperature change).

  According to the determination apparatus 10 according to the third embodiment, the determination unit 14 further detects the presence or absence of changes in the vehicle detection coil 11 and the noise coil 12, and then further detects the vehicle detection coil 11 and the noise coil 12. Then, the warehousing state and abnormal state of the vehicle are determined. In this case, since the warehousing state and the abnormal state of the vehicle are determined using the detection results of a plurality of timings, it can be appropriately determined in consideration of the influence of the vehicle height of the warehousing vehicle and the climatic conditions.

  Further, the control circuit 13 changes the current value after the presence or absence of changes in the vehicle detection coil 11 and the noise coil 12 is detected once, and the determination unit 14 changes the vehicle detection coil 11 or noise after changing the current value. The warehousing state and the abnormal state of the vehicle are determined using the result of detecting whether or not the coil 12 has changed. In this case, by changing the current value, the measurement is performed while changing the timing and conditions measured first, so that the warehousing state and the abnormal state of the vehicle can be determined more accurately.

[Fourth embodiment]
In 4th Embodiment, the variation | change_quantity of the magnetic flux of the vehicle detection coil 11 and the variation | change_quantity of the magnetic flux of the noise coil 12 are correct | amended using the detection result by a temperature sensor. FIG. 11 shows a determination apparatus 10A according to the fourth embodiment. The determination device 10A includes a vehicle detection coil 11, a noise coil 12, a control circuit 13, a determination unit 14A (determination unit), a battery 15, a communication unit 16, and a temperature sensor 17 (detection unit). It consists of

  The temperature sensor 17 is a known temperature sensor, detects the temperature around the determination device 10A at a predetermined timing (for example, once per minute), and sends the detection result to the determination unit 14A. 14 A of determination parts acquire the temperature from the temperature sensor 17, and based on the fixed coefficient and temperature change amount for every predetermined temperature, the variation | change_quantity of the magnetic flux of the vehicle detection coil 11, and the magnetic flux of the noise coil 12 Correct (correct) the amount of change. For example, the determination unit 14A corrects the change amount of the magnetic flux so as to decrease when the change amount of the temperature is high, and does not correct the change amount of the magnetic flux so much when the change amount of the temperature is low. 14 A of determination parts determine whether the vehicle detection coil 11 and the noise coil 12 changed using the corrected variation | change_quantity.

  Temperature and humidity changes can affect changes in magnetic flux. For example, the amount of magnetic flux may increase with increasing temperature. As described above, the determination unit 14A can calculate the amount of change in magnetic flux that excludes the influence of temperature by correcting the amount of change in magnetic flux according to the change in temperature. A humidity sensor may be used instead of the temperature sensor.

  According to the determination apparatus 10 according to the fourth embodiment, the determination unit 14A further determines the warehousing state and the abnormal state of the vehicle by further using the temperature and humidity detection results. Can be determined.

  In each of the above-described embodiments, the case where it is determined whether or not there is a change in the vehicle detection coil 11 and the noise coil 12 on the basis of the change amount of the magnetic flux has been described. However, the change amount used in well-known vehicle detection You may make it determine whether there exists a change in the vehicle detection coil 11 and the noise coil 12 based on (for example, the variation | change_quantity of an inductance).

  DESCRIPTION OF SYMBOLS 10, 10A ... Determination apparatus, 11 ... Vehicle detection coil, 12 ... Noise coil, 13 ... Control circuit, 14, 14A ... Determination part, 15 ... Battery, 16 ... Communication part, 17 ... Temperature sensor, 20 ... GW apparatus, 30 ... parking lot management server, 40 ... vehicle, 101 ... CPU, 102 ... RAM, 103 ... ROM, 104 ... communication module, 105 ... auxiliary storage device, 106 ... coil.

Claims (6)

A first coil that is a coil for detecting a vehicle entering the parking lot;
A second coil that is a coil for detecting an abnormal state and is configured such that the magnetic flux is smaller than that of the first coil;
A determination device comprising: determination means for determining a warehousing state and an abnormal state of the vehicle based on detection results of the first coil and the second coil. The first coil is a loop coil that forms a predetermined first loop shape,
The second coil is formed with an outer peripheral side of the second loop shape along the first loop shape, and is folded inward at a predetermined folding point to form an inner periphery of the second loop shape. The determination device according to claim 1, wherein the determination device is a loop coil. The second coil is a plurality of coils arranged in the range of the inner periphery of the first coil,
The determination device according to claim 1, wherein the determination unit uses detection results of the plurality of coils as detection results of the second coil.   The determination means is based on the detection result of the first coil and the second coil at the first timing and the detection result of the first coil or the second coil at the second timing after the first timing. The determination apparatus according to any one of claims 1 to 3, which determines a storage state and an abnormal state of the vehicle.   The determination device according to claim 4, further comprising a current value control unit that changes a current value to be sent to the first coil or the second coil after the first timing and before the second timing. . It further comprises detection means for detecting temperature or humidity,
The determination device according to any one of claims 1 to 5, wherein the determination unit further determines a warehousing state and an abnormal state of the vehicle by further using a detection result by the detection unit.

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