JP2007024709A - Vehicle detector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle detector, without requiring a magnetic sensor to be buried for each parking space, or without requiring installation of a pole for an infrared beam, capable of very easily being installed at comparatively low cost, facilitating maintenance management without misoperations, and surely detecting a vehicle that has a part of the body made of nonmagnetic metals or a resin part. <P>SOLUTION: The vehicle detector detecting the parking of a vehicle in a parking area PS is composed of a sensor unit 10, provided with a sensor signal transmission part 11A and a sensor signal receiving part 11B; and a reflecting surface 5, refracting and reflecting the sensor signal transmitted from the sensor signal transmission part 11A vertically upward from the parking road surface, and refracting and reflecting the sensor signal impinging on the vehicle and returning therefrom to the direction to the sensor signal receiving part 11B from the vertical direction. When the sensor signal receiving part 11B receives the sensor signal, it is decided that a vehicle has been detected. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle detection apparatus suitable for implementation in a flap type parking lot and other types of parking lots.

  Stopping the exit of a vehicle that has stopped in a predetermined parking space for a certain period of time or more by turning the flap plate upright, while preventing the vehicle from exiting after the parking fee has been settled, returning the flap plate to a state where the flap plate is turned down Flap-type parking devices that are configured to rotate and release are open only for a short period of time, such as in small-scale primary user parking lots in urban downtown areas, and for the effective use of land under redevelopment. It is widely adopted as a device that constitutes an unattended parking lot system in a parking lot or the like.

To operate a flap type parking device of this type, or for a parking management device that simply detects the occupied state and empty state of the parking space and outputs a display that restricts entry of the vehicle when it is full For example, as seen in Patent Document 1, as a vehicle sensor for detecting a vehicle that has entered the parking space, an electromagnetic loop antenna or bar antenna-like coil is embedded in the parking space, and the vehicle has entered the vicinity of the sensor. What detects a vehicle by the change of the reactance at the time etc. is generally employ | adopted.
JP 2001-250195 A

  FIG. 8 shows a configuration example of a conventional flap type parking lot in which the sensor (vehicle detector) described in Patent Document 1 is embedded in a parking space. In the figure, PS is a parking space. , FP is a flap type parking device composed of a drive part FK, a flap plate FT and a bearing part FH, SN is a loop antenna type or bar antenna type sensor embedded in the parking space PS, TN is a tire stop, AK is a vehicle It shows the approach direction.

  In the flap type parking lot configured as described above, when a vehicle (not shown) entering in the direction of the arrow AK gets over the flap plate FT of the flap type parking device FP and enters a position where the tire hits the tire stop TN. When the sensor SN is turned on to detect the vehicle and this detection state has passed for a set time or longer, the drive unit FK operates to turn the flap plate FT upright, and then the vehicle exits (ships).・ It is structured to physically prevent participation.

  FIG. 9 shows a configuration example of a conventional flap type parking lot using an optical sensor instead of the underground buried sensor SN, where PS is a parking space and FP is a drive. A flap type parking device constituted by a part FK, a flap plate FT and a bearing part FH, TN is a tire stop, CR is a parked vehicle, PR is a pole provided on one side of the parking space PS, A light emitting side sensor or a light receiving side sensor (both not shown) is provided, and a light receiving side sensor or a light emitting side sensor (both not shown) is provided in the bearing portion FH, so that a light projecting beam to the light receiving side sensor is generated. The vehicle is detected by being blocked by the entering parked vehicle CR, and the flap plate FT is turned upright when this detection state has exceeded a set time.

  However, in the flap type parking lot using the embedded sensor SN as shown in FIG. 8 above, it is necessary to dig a buried space for the sensor SN on the road surface in a state of being accurately positioned for each parking space PS of the parking lot. In addition, it is necessary to enclose a resin agent or the like for waterproof and rust prevention measures around the sensor SN to be embedded, and there is a problem that it takes time and cost for installation work.

  Moreover, in the system using an infrared beam as shown in FIG. 9, since the pole PR is erected for each parking space PS, the installation cost of the parking system for each single parking space becomes high. In addition, since the pole PR will be established in the parking lot, not only will the parking lot users be blocked, but there will also be a risk of accidents where the vehicle CR and the pole PR come into contact when the vehicle is turned over. ing. Furthermore, in this method, the elevation angle of the beam axis is set upward by about 30 ° to 40 °, so that the lens surface of the sensor light projecting unit or the light receiving unit on the road surface side faces upward, and dust accumulation occurs. As a result, there is a problem that the maintenance cost increases because the lens surface must be frequently cleaned.

  Furthermore, in the vehicle detection method using the transmission / reception type sensor such as the infrared beam as shown in FIG. 9 above, the parking of the vehicle CR is determined only by the presence / absence of an object that blocks the signal. Even if a user or a third party who does not use maliciously put something on the sensor, or if a small animal such as a cat is taking a nap at a position where the signal is blocked, the vehicle is parked. In the worst case, there is a risk of a rear-end collision between the flap plate FT and the vehicle CR due to a malfunction in which the flap plate FT stands up after being judged as being.

  As described above, since there are various risks in judging the detection of the vehicle CR based on the presence / absence of an object, the metal portion (magnetic portion) of the vehicle CR is generally shown in Patent Document 1 and FIG. It is effective to use an electromagnetic embedded sensor SN as shown or a magnetic sensor that detects the presence of the vehicle CR from a change in geomagnetism found in, for example, the application of Japanese Patent Application No. 2004-358167.

  However, in recent new models, there are increasing numbers of models in which parts of the vehicle body are made of non-magnetic metal, and models that are actively adopting resin parts for weight reduction. Even when used, it may be difficult to reliably detect a parked vehicle.

  Thus, the present invention has been developed to solve the above-mentioned problems all at once, and its technical problem is to embed a magnetic sensor in each parking space or to set up an infrared beam pole or the like. It is a vehicle that can be installed very easily and at a relatively low cost, is easy to maintain and is free from malfunctions, and is partly made of non-magnetic metal or resin parts. However, it is providing the vehicle detection apparatus devised so that this can be detected reliably.

(1) In order to solve the above technical problem, the vehicle detection device according to claim 1 of the present invention is based on whether the transmitted sensor signal reflects the presence or absence of the parked vehicle in the parking area to the detection target vehicle. A vehicle detection device configured to make a determination based on a change in a reception state, a sensor signal transmission unit capable of transmitting a sensor signal for vehicle detection, and reflected back to a detection target vehicle The sensor unit having a sensor signal receiving unit for receiving the sensor signal and the sensor signal transmitted from the sensor signal transmitting unit are reflected substantially vertically above the parking road surface and reflected back to the detection target vehicle. The sensor signal is composed of a reflection surface that reflects toward the sensor signal receiver, and the sensor signal receiver determines that the vehicle is detected when the sensor signal is received. It is set to.

(2) Further, in the vehicle detection device according to claim 2 of the present invention, the sensor unit is disposed in a posture in which the sensitivity axis that maximizes the directivity of the transmission signal and the reception signal is substantially parallel to the parking road surface. On the other hand, the reflection surface is arranged so as to face the sensor unit with an upward inclination of 30 ° to 60 °, preferably 45 °, at a position blocking the directional maximum sensitivity axis.

(3) Further, in the vehicle detection device according to claim 3 of the present invention, the sensor unit is provided inside a flap drive unit in the flap type parking device, and the reflection surface faces the flap plate drive unit. It is characterized by being provided integrally with the plate bearing portion or via another member.

(4) Moreover, in the vehicle detection device according to claim 4 of the present invention, the sensor unit is installed directly on the road surface in the vicinity of the flap plate bearing portion in the flap type parking apparatus or via another member. The reflection surface is provided integrally with the outer shape of the flap plate bearing portion facing the sensor unit or via a separate member.

(5) Moreover, the vehicle detection apparatus which concerns on Claim 5 of this invention is a parking road surface in which the said sensor unit is located in the back | inner side rather than the center part of the vehicle width direction at the intermediate part of the width direction in a parked vehicle. The reflective surface is mounted on the parking road surface in the vicinity of the sensor unit, facing the sensor unit alone, or with respect to an existing structure such as a tire stopper provided on the parking road surface. The sensor unit is provided integrally with the sensor unit or via a separate member.

(6) Further, in the vehicle detection device according to claim 6 of the present invention, the sensor unit is provided with a magnetic sensor that reacts to the magnetic body portion of the parked vehicle, and both the signal detection by the sensor unit and the magnetic detection by the magnetic sensor are performed. Thus, it is characterized in that it is configured to determine the detection of a parked vehicle.

  According to the means described in the above (1), when there is no vehicle in the parking area, the sensor is transmitted from the sensor signal transmitter of the sensor unit and is refracted and reflected substantially vertically above the parking road surface by the reflecting surface. The signal does not travel and return vertically as it is, but when the vehicle is parked in the parking area, the sensor signal that is refracted and reflected vertically upward hits the reflecting surface and hits the bottom of the vehicle to be detected. Since the reflected signal is reflected substantially vertically downward and the reflection surface is refracted and reflected toward the sensor signal receiving portion of the sensor unit, the presence of the vehicle can be detected by the change in the reception state.

  According to the means described in (2) above, the sensor unit is installed so that the directional maximum sensitivity axis is horizontal, but in this posture, the transmitting surface and the receiving surface are vertical surfaces. There is no need to worry about the accumulation of dust or water droplets on the surface, the need to frequently clean the sensor detection surface after installation, and the reflective surface is 30 ° to 60 °, preferably 45 ° to the parking road surface. Therefore, when a sensor transmission signal is incident, the signal is refracted and reflected almost vertically upward, and the presence or absence of a parked vehicle can be properly detected.

  According to each means described in the above (3) and (4), the vehicle detection device according to the present invention is subjected to a special design change with respect to the flap type parking device installed in the flap type parking lot, It is possible to carry out relatively easily and at a low cost without providing special devices or parts.

  According to the means described in the above (5), the present invention utilizes the existing structures such as tire stops provided on the parking road surface for parking lots other than the flap type parking lot. It is possible to install such a vehicle detection device easily and at low cost.

  According to the means described in the above (6), the presence or absence of a parked vehicle in the parking area can be accurately detected by both the magnetic detection by the magnetic sensor that reacts to the magnetic body portion of the parked vehicle and the signal detection by the sensor unit. Even if a non-magnetic object that is not a vehicle covers the sensor, an erroneous determination that there is a parked vehicle is not made. This makes it possible to avoid problems that may occur.

  As described above, according to the vehicle detection device of the present invention, excavation work and waterproofing processing for burying the sensor, or burial work and facility work for wiring for the sensor, etc. are completely unnecessary. In addition, since there is no need to install a pole to install the sensor, the installation work is simple, and it is economical that new construction or renovation of a parking lot can be realized at a relatively low cost. It can be easily implemented in flap-type parking lots and other parking lots equipped with a parking management device that detects the occupied state of a parking space, for example, and grasps the number of parking spaces and displays the full vehicle status. Because there is no need to provide a structure that obstructs the passage of vehicles or people in the parking space, it is possible to provide a parking lot that is easy for parking users to use without accidents when parking, and false detection possibility It at least was the point coupled with, as a vehicle detection device for parking, but truly innovative.

  Hereinafter, the embodiment of the vehicle detection device according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing the appearance of the flap type parking device according to the first embodiment of the present invention, and FIG. ) Is a partially broken plan view, FIG. 1B is a front view, and in FIG. 1, PS is a parking area (parking) of a flap type parking lot in which a flap type parking apparatus generally indicated by reference numeral 1 is installed. In the space), the flap type parking apparatus 1 is installed for each parking area.

  In each of the above drawings, 3 is a flap plate drive unit in which a drive mechanism (not shown) such as a motor and a link device is housed, 3T is a drive lever operated by this drive mechanism, 3F is one end of the flap plate drive unit 3 A substrate in which a flap plate bearing portion 4 is continuously provided opposite to the flap plate driving portion 3 at the other end portion, and an arm portion 2A provided at one end portion of the flap plate driving portion 3 is provided on the other end portion. A flap plate is shown in which a mounting shaft 2B (see FIG. 2A), which is pivotally attached to the drive lever 3T and protrudes from the other end, is rotatably supported by the flap plate bearing portion 4.

  The flap plate 2 of the flap type parking apparatus 1 configured as described above is installed horizontally on the road surface of the parking area PS as shown in the drawings when the vehicle is in an empty state where the vehicle is not parked in the parking area PS. Although the vehicle is supported in a horizontal state on the substrate 3F, that is, in a face-down state, the vehicle enters (enters), for example, the state shown in FIG. When the vehicle detection device detects the incoming vehicle and detects that the vehicle has stopped for a certain period of time, the flap plate 2 is raised and rotated by the drive of the flap plate drive unit 3. (Shipping) is configured to physically block.

  Further, when the vehicle leaves the vehicle, the flap plate driving unit 3 is shown with the flap plate 2 in an upright state when various procedures necessary for leaving the vehicle, such as payment of a parking fee or reading of a commuter pass, are completed. The vehicle is configured to be able to exit the vehicle by turning back to the lying state.

  Next, in FIG. 2, reference numeral 10 denotes a sensor unit attached to one side of the flap plate driving unit 3, which includes a sensor signal transmission unit 11 </ b> A that transmits a vehicle detection sensor signal, and a detection target. A sensor signal receiving unit 11B that receives the sensor signal reflected back to the vehicle, and when the sensor signal receiving unit 11B receives the sensor signal reflected back, When it is determined that the vehicle is parked and the sensor signal receiving unit 11B does not receive the sensor signal, that is, when the sensor signal is not reflected and returned, it is determined that there is no parked vehicle in the parking area PS. Thus, the flap plate 2 is maintained in a face-down state, and the vehicle can be stored.

  Further, in the figure, reference numeral 3H denotes a window provided on the cover of the flap plate driving unit 3 so that the sensor signal can be transmitted and received by the sensor unit 10, and 5 denotes the flap plate facing the sensor unit 10. The vehicle detection device according to the present invention is a reflection surface provided on the surface of the bearing portion 4, and is configured by the sensor unit 10 and the reflection surface 5, and the configuration shown in FIGS. A first embodiment of the present invention described in claim 3 is shown.

  In the first embodiment of the present invention shown in FIGS. 1 and 2, the sensor unit 10 mounted in the flap plate drive unit 3 has a sensitivity axis that maximizes the directivity of the transmission and reception signals with respect to the parking road surface. It is arranged in a posture that is almost parallel. The reflecting surface 5 has the bearing portion facing the sensor unit 10 in a state where the reflecting surface 5 has an upward inclination of 30 ° to 60 °, preferably 45 °, at a position blocking the directional maximum sensitivity axis. The sensor signal incident from the sensor signal transmission unit 11A of the sensor unit 10 is provided substantially vertically above the road surface of the parking area PS. While being refracted and reflected, the sensor signal reflected back to the parked vehicle (detection target vehicle) and returned substantially vertically downward is refracted and reflected in the horizontal direction from the vertical toward the sensor signal receiving unit 11B of the sensor unit 10. It is configured.

  In addition, as the sensor unit 10 for transmission / reception described above, an ultrasonic sensor is suitable, and by measuring the time required for the transmitted ultrasonic wave to be reflected back to the bottom of the parked vehicle, parking is performed. Using a general distance measuring means for measuring the distance to the vehicle (object), the present invention can be easily realized while avoiding the influence of signal attenuation on each reflecting surface. Yes.

  Further, as another embodiment, it is possible to use a laser light or infrared light emitting element and a light receiving element. Similar to the above ultrasonic sensor, on the light receiving element of a minute reflected light using the principle of triangulation. By calculating the detection state and selecting an element that measures the distance to the reflective object (parked vehicle), it is possible to avoid the effects of signal attenuation on each reflective surface and unevenness on the bottom of the parked vehicle. However, the present invention can be realized.

  Further, in the present embodiment, the sensor signal transmission unit 11A and the sensor signal reception unit 11B are arranged so that the directivity maximum sensitivity axis is horizontal, but in this posture, the transmission surface and the reception surface are vertical surfaces. In addition, it is also advantageous that there is no concern about dust accumulation on the sensor detection surface or residual water droplets, and maintenance costs such as frequent cleaning of the sensor detection surface after installation can be reduced.

  In addition, the reflective surface 5 may be configured by attaching a flat plate such as glass or stainless steel separately to the inclined portion. By making it possible to replace only that portion, maintenance can be easily replaced in case of accidental damage. It is also possible to respond.

  FIG. 3 shows a vehicle detection apparatus according to a second embodiment of the present invention described in claim 4, wherein (A) is a perspective view of the entire apparatus, (B) is a plan view thereof, C) shows a side view, and in these drawings, the sensor unit 10 having the sensor signal transmission unit 11A and the sensor signal reception unit 11B is casing as a transmission / reception sensor unit separately from the flap type parking apparatus 1, Directly in a state where the sensor unit 10 is in the vicinity of the flap plate bearing portion 4 constituting the flap type parking apparatus 1 and on the road surface of the parking area PS with a certain space from the flap plate bearing portion 4. It is installed horizontally through another member.

  Further, the reflection surface 5A provided on the flap plate bearing portion 4 is integrally formed as an upward inclined surface of about 45 ° on the side surface of the end portion of the flap plate bearing portion 4 facing the direction of the sensor unit 10. Or it is provided through another member, but the configuration of the sensor unit 10 and the installation posture thereof, the angle of the reflecting surface 5A, etc. are all described in the embodiment shown in FIGS. The detailed description thereof is omitted here.

  According to the second embodiment of the present invention shown in FIG. 3, compared to the first embodiment shown in FIGS. 1 and 2, the detection distance from the sensor unit 10 to the reflecting surface 5A, specifically, The detection distance from the sensor unit 10 to the parked vehicle (detection target vehicle) can be shortened as shown in the figure, the area of the reflecting surface 5A covering the directivity range can be reduced, and the directivity maximum sensitivity axis can be easily adjusted. Since the choice of suitable sensor elements increases in the implementation of the present invention, it becomes possible to adopt cheaper elements, making installation and adjustment work cheaper while reducing the cost of the entire device. Can be done.

  FIG. 4 shows a vehicle detection apparatus according to a third embodiment of the present invention as set forth in claim 5. That is, FIG. 4 shows an example of a vehicle detection device in a parking lot provided with a management device that detects the occupation state of a predetermined parking space, grasps the number of parked vehicles, and displays a full vehicle state. Is installed near the center of the parking area PS, and its directional maximum sensitivity axis faces the direction of one tire stop 20. The tire stop 20 is provided with an inclination of about 45 °, and a reflection plate 21 is fixed to the end thereof. As shown by the thick arrows, the signal transmitted from the transmission / reception sensor unit 10 is converted almost vertically upward by the reflecting plate 21, and when the vehicle is parked, the reflection from the bottom of the vehicle is again horizontal at the reflecting plate 21. By being converted to, and reaching the transmission / reception sensor unit 10, the vehicle can be detected.

  Although not shown in the embodiment shown in FIG. 4, the vehicle detection device having the configuration shown in FIG. 4 is arranged in the vicinity of the flap type parking device 1 as shown in FIGS. In this case, the vehicle detection device of the present invention can be mounted even if the flap parking device has a conventional shape.

  FIG. 5 is an exploded perspective view of the entire sensor unit 10 used when the vehicle detection apparatus according to the fourth embodiment of the present invention described in claim 6 is implemented. Is an upper case body, 16 is a bottom plate, 13 and 13 are screws for attaching the upper case body 12 to the bottom plate 16, and 12R and 16R are screw holes provided in the upper case body 12 and the bottom plate 16. Further, in the figure, 12A and 12B are mounting holes for mounting the sensor signal transmitting unit 11A and the sensor signal receiving unit 11B provided on the side end surface of the upper case body 12, and 14 is a substrate mounted inside the sensor unit 10, and 15A , 15B indicate first and second magnetic sensors for vehicle detection mounted on the substrate 14 at a predetermined interval.

  As described above, the sensor unit including the first and second magnetic sensors 15A and 15B is installed on the road surface of the parking space PS in the form of the embodiment shown in FIGS. The system is capable of determining the presence or absence of a parked vehicle in the parking space PS by both the signal detection by the transmitter 11A and the sensor signal receiver 11B and the magnetic detection by the first and second magnetic sensors 15A and 15B. ing. Each of the sensor units 10 used in the embodiments shown in FIGS. 1 to 4 is obtained by removing the first and second magnetic sensors 15A and 15B from the sensor unit 10 shown in FIG. It is built in almost the same configuration.

  6 is a block diagram for explaining the electrical configuration of the control unit 10W in the sensor unit 10 shown in FIG. 5. In the figure, 30 is a central CPU of the control unit, 31 is a bus, 32 is a ROM, 33 Is an A / D converter. The A / D converter 34 is connected to the first and second magnetic sensors 15A and 15B, and the sensor signal receiving unit 11B is connected via a receiving circuit 35. It is connected.

  The A / D converter 34 takes in the outputs of the first and second magnetic sensors 15A and 15B in addition to the output of the sensor signal receiving unit 11B, and causes the CPU 30 to determine the outputs of both, and both outputs are parked. When in the state of detecting the presence of the vehicle, the CPU 30 sends a command to the vehicle detection signal output unit 37 connected to the I / O interface 36 to output a vehicle detection signal.

  Specifically, the first magnetic sensor 15A and the second magnetic sensor 15B determine the presence or absence of a magnetic body (parked vehicle) in the vicinity of the parking area PS based on the output difference between the waveforms. When the object (non-magnetic material) approaches the parking area PS, the sensor signal receiving unit 11B outputs a detection signal, but the first and second magnetic sensors 15A and 15B do not react. The determination of none will continue.

  Therefore, for example, even when a non-magnetic object (such as a person or a small animal, or a piece of paper, a piece of wood, a plastic material, etc.) that is not a vehicle covers the sensor, an erroneous determination that there is a parked vehicle does not occur. It is possible to improve the reliability and stability of vehicle detection by solving the malicious mischief by third parties and the problem of false detection due to the presence of small animals and the like.

  Furthermore, according to the vehicle detection apparatus of the fourth embodiment of the present invention described in claim 6 shown in FIG. 5 and FIG. 6, a part of the vehicle body is made of a nonmagnetic metal, or for weight reduction. Even in recent new vehicle models that actively employ resin parts, the parking state can be reliably detected, so that it has the advantage of being able to cope with the current situation.

  FIG. 7 is a flowchart illustrating a vehicle detection processing procedure in the vehicle detection apparatus according to the fourth embodiment shown in FIGS. 5 and 6. First, in step S 1 in FIG. The presence / absence of a magnetic body in the vicinity of the parking space is determined based on the output difference between the waveforms of the magnetic sensor 15A and the second magnetic sensor 15B. Even if an object (non-magnetic material) other than the vehicle approaches, the first and second magnetic sensors 15A and 15B do not react, so the determination in step S1 is not YES, and the determination of no vehicle in step S2 is continued. The

  When the vehicle enters the parking space, a member using a magnetic metal is always used for a part of the vehicle. Therefore, in step S1, the difference between the first and second magnetic sensors 15A and 15B is a threshold value. It rises above. After detecting the entry of the magnetic body in step S1, it is determined in step S3 whether or not the signal of the sensor signal receiving unit 11B is equal to or greater than a threshold value. To do. This determination is continued until the vehicle leaves the sensor, and during this time, the change in the signals of the first and second magnetic sensors 15A and 15B is not used for the determination.

The perspective view which showed the external appearance of the flap type parking apparatus which is 1st Example of the vehicle detection apparatus which concerns on this invention. (A) is a partially broken plan view of the flap type parking apparatus shown in FIG. 1, and (B) is a front view thereof. (A) is the perspective view which showed the structural example of the flap type parking apparatus which is 2nd Example of the vehicle detection apparatus which concerns on this invention, (B) is the top view, (C) is a side view. The perspective view which showed roughly the structure of the parking lot which is 3rd Example of the vehicle detection apparatus which concerns on this invention. The perspective view which decomposed | disassembled and showed the whole sensor unit provided with the magnetic sensor used in 4th Example of the vehicle detection apparatus which concerns on this invention. The block diagram explaining the electrical constitution of the vehicle detection apparatus which concerns on 4th Example of this invention shown in FIG. The flowchart explaining the procedure of the vehicle detection by the vehicle detection apparatus which is 4th Example of this invention. The perspective view which showed the Example of the conventional electromagnetic vehicle detection apparatus. The example of a structure of the conventional vehicle detection apparatus using an infrared beam is shown, (A) is the top view, (B) is a front view, (C) is a side view.

Explanation of symbols

PS Parking area (parking space)
DESCRIPTION OF SYMBOLS 1 Flap-type parking apparatus 2 Flap board 3 Flap board drive part 4 Flap board bearing part 5, 5A Reflecting surface 10 Sensor unit 11A Sensor signal transmission part 11B Sensor signal receiving part 15A, 15B 1st, 2nd magnetic sensor 20 Tire Stop 21 Reflecting surface

Claims (6)

A vehicle detection device configured to determine the presence or absence of a parked vehicle in a parking area with a change in a reception state caused by a transmitted sensor signal reflected on a detection target vehicle,
A sensor unit having a sensor signal transmitter capable of transmitting a sensor signal for vehicle detection, and a sensor signal receiver for receiving a sensor signal reflected back to the vehicle to be detected; and
Reflection that reflects the sensor signal transmitted from the sensor signal transmitter substantially vertically above the parking road surface and reflects the sensor signal that is reflected back to the vehicle to be detected toward the sensor signal receiver. The vehicle detection device is configured to determine that the vehicle is detected when the sensor signal receiving unit receives the sensor signal.   Position where the sensor unit is arranged in a posture in which the sensitivity axis that maximizes the directivity of the transmission signal and the reception signal is substantially parallel to the parking road surface, while the reflection surface is blocked on the directivity maximum sensitivity axis The vehicle detection device according to claim 1, wherein the vehicle detection device is arranged to face the sensor unit with an upward inclination of 30 ° to 60 °, preferably 45 °.   The sensor unit is provided inside a flap drive unit in the flap type parking apparatus, and the reflection surface is provided integrally with a flap plate bearing portion facing the flap plate drive unit or via a separate member. The vehicle detection device according to claim 1, wherein the vehicle detection device is provided.   The sensor unit is installed directly on the road surface in the vicinity of the flap plate bearing portion in the flap type parking apparatus or via another member, and the reflection surface of the flap plate bearing portion facing the sensor unit is provided. The vehicle detection device according to claim 1, wherein the vehicle detection device is provided integrally with the outer shape portion or via a separate member.   The sensor unit is installed on a parking road surface located in the middle part in the width direction of the parked vehicle and on the back side of the center part in the vehicle length direction, and the reflection surface is on the parking road surface in the vicinity of the sensor unit. To the sensor unit alone or to an existing structure such as a tire stopper provided on the parking road surface so as to be opposed to the sensor unit or provided through a separate member. The vehicle detection device according to claim 1, wherein the vehicle detection device is provided.   The sensor unit is provided with a magnetic sensor that reacts to the magnetic body portion of the parked vehicle, and the detection of the parked vehicle is determined by both the signal detection by the sensor unit and the magnetic detection by the magnetic sensor. The vehicle detection device according to claim 1, 2, 3, 4, or 5.

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