JP2008008099A - Wheel-distinction method and wheel-distinction device of vehicle of mechanical parking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accurately and promptly discriminate wheels of a vehicle even when the vehicle entries diagonally into a vehicle-type distinction area, and improve the precision of distinction of a vehicle type. <P>SOLUTION: Two sets of detection signals, which are ON, OFF, ON, OFF in order, of a wheel detection sensor are detected (the first set comprises steps (20) and (30), and the second step comprises steps (50) and (70)). In addition, in each step, only when the value, which is obtained by dividing the time difference between the detection-start time of the earlier ON signal and the detection-start time of the later ON signal by the detection time length of the earlier ON signal, is less than a standard value (steps (40) and (80)), and furthermore, only when the ratio of a detection time length of a wheel passing through the wheel detection sensor first, which is obtained by the detection of the first set, to a detection time length of a wheel passing through the wheel detection sensor first, which is obtained by the detection of the second set, is within a predetermined range (a step (60)), it is determined that wheel arrangement is OK (a step (100)). <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle wheel discriminating method and discriminating apparatus in a mechanical parking apparatus.

  In recent years, mechanical parking devices with excellent accommodation efficiency have been widely installed in public facilities, commercial facilities, apartment houses, and the like. In particular, in a parking apparatus having a large number of accommodation units, a vehicle type (general passenger car such as a sedan or wide and high roof car such as a one-box car or RV car) that can be stored is provided for each parking room. The so-called warehousing category to be limited is set, and parking rooms having different sizes are assigned for each vehicle form. For example, the warehousing division is divided between passenger cars such as sedans and high-hof cars such as one-box cars and RV cars, and so-called flat parking spaces are allocated to large cars and modified cars that do not fall under either category. Yes.

In the case of a mechanical parking device in which such a storage category is set, it is necessary to determine the form of the vehicle at the vehicle entrance. Conventionally, in this discrimination work, a parking clerk judges from the vehicle type, shape, etc., selects a suitable unit or parking room, and instructs to guide the course of the vehicle.
However, the conventional method of leaving the parking lot staff to discriminate the vehicle is a hindrance to promoting unmanned operation (decreasing the number of people) when driving the mechanical parking device, and also induces mistakes in judging the staff. There was also a risk. In addition, for vehicles equipped with accessories such as carriers, it is difficult to select a parking room, which deteriorates the operation efficiency of the mechanical parking device. In order to solve such a problem, the present applicant has developed a vehicle type discriminating apparatus that can discriminate the vehicle type of a vehicle passing through the vehicle type discriminating area accurately and quickly (see, for example, Patent Document 1). ).

Japanese Patent No. 3116213

Now, the vehicle type identification device specifies the position of a wheel and measures the dimensions of each part of the vehicle body based on the wheel. However, the conventional vehicle type identification device detects the position of the wheel on the assumption that the vehicle enters the vehicle type identification area and the left and right wheels of the vehicle are completely aligned, and is not suitable for the actual situation. It was. That is, usually, the vehicle enters the vehicle type discrimination area at an angle or the steering angle is given to the front wheels, and the conventional vehicle type discriminator is used for the vehicle that entered the vehicle type discrimination area. There is a possibility that the position of the wheel serving as a measurement reference is not accurately specified, for example, the position of the left and right front wheels is misidentified as the position of the front and rear wheels, and an incorrect vehicle type is discriminated.
The present invention has been made in view of the above problems, and the object of the present invention is to accurately determine the wheels of the vehicle in the mechanical parking device even when the vehicle enters the vehicle type determination area obliquely. In addition, the purpose is to increase the accuracy of vehicle type discrimination.

  In order to solve the above-mentioned problem, a wheel determination method for a vehicle in a mechanical parking device according to the present invention is a method for detecting a wheel of a vehicle passing through a detection area of the mechanical parking device, and is located near the ground surface. A wheel detection sensor composed of a transmissive photoelectric sensor is arranged so that transmitted light is emitted in the vehicle width direction, and the wheel detection signal obtained by the wheel detection sensor passes through the wheel detection sensor first. When the value obtained by dividing the time difference between the detection start time of the wheel to be detected and the detection start time of the wheel to be passed immediately after by the detection time length of the wheel to be passed first is less than the reference value, the wheel detection sensor is It is determined that the wheel passing immediately after and the wheel passing immediately thereafter are on the same axle.

According to the present invention, a wheel detection sensor composed of a transmission photoelectric sensor is arranged in the vicinity of the ground surface so that transmitted light is irradiated in the vehicle width direction, so that the wheel is actually out of the entire wheel. Only the part close to the grounding area is detected reliably.
And among the wheel detection signals obtained by the wheel detection sensor, the time difference between the detection start time of the wheel that first passes through the wheel detection sensor and the detection start time of the wheel that passes immediately after that is detected for the wheel that passes first. When the value divided by the time length is less than the reference value, it is determined that the wheel that passes the wheel detection sensor first and the wheel that passes immediately after the wheel detection sensor are on the same axle. Even when passing diagonally, it is possible to accurately grasp the positions of the left and right wheels on the same axle.

  Further, in the present invention, a vehicle body length detection means is provided in the detection area, and the detection signal of the wheel passing through the wheel detection sensor, which is obtained by the wheel detection sensor during the vehicle body length detection, and immediately after that. 2 sets of detection signals for wheels passing through the vehicle are obtained, and obtained by detection of the first set, the detection time length of wheels passing through the wheel detection sensor first, and obtained by detection of the second set, When the ratio of the detection time length of the wheel passing through the wheel detection sensor first is within a predetermined range, it is desirable to determine that the size of the front and rear wheels of the vehicle passing through the detection area is the same.

  According to the present invention, the detection of the second set is based on the detection time length of the wheel that first passes through the wheel detection sensor obtained by the detection of the first set, that is, the size of one of the left and right wheels of the front wheel. The detection time length of the wheel passing through the wheel detection sensor first, that is, by measuring the size of the rear wheel, even if the vehicle passes diagonally with respect to the detection area, It is possible to accurately grasp the difference in size.

Further, in the present invention, it is desirable to determine that the vehicle passing through the detection area has an unsuitable wheel arrangement for warehousing unless it is determined that the front and rear wheels have the same size.
According to the present invention, even when the vehicle passes obliquely with respect to the detection area, the vehicle having different front and rear wheel sizes that cannot be parked in the mechanical parking device is grasped. It is possible to reliably prevent erroneous entry into the apparatus.

Further, in the present invention, from any of the two sets of wheel detection signals, unless it is determined that the wheel that passes through the wheel detection sensor first and the wheel that passes immediately after that are on the same axle, It is desirable to determine that the vehicle passing through the detection area has a wheel arrangement that is inappropriate for warehousing.
According to the present invention, when the vehicle passes obliquely with respect to the detection area, if it is not determined that the wheel that passes the wheel detection sensor first and the wheel that passes immediately after that are on the same axle, A mechanical parking device for vehicles that cannot be accurately grasped on the left and right wheels of the axle, so it is determined that the wheel arrangement is inappropriate for warehousing, and it is uncertain about the dimensions of each part of the car body. It is possible to reliably prevent erroneous entry into.

  Moreover, the vehicle wheel discriminating device in the mechanical parking device according to the present invention for solving the above-mentioned problem is a device for detecting the wheel of a vehicle passing through the detection area of the mechanical parking device, A wheel detection sensor composed of a transmissive photoelectric sensor is arranged in the vicinity so that transmitted light is irradiated in the vehicle width direction, and among the wheel detection signals obtained by the wheel detection sensor, the wheel detection sensor When the value obtained by dividing the time difference between the detection start time of the wheel passing first and the detection start time of the wheel passing immediately after by the detection time length of the wheel passing first is less than the reference value, the wheel It is characterized by comprising a discriminating means including processing logic for judging that the wheel that passes through the detection sensor first and the wheel that passes immediately after the detection sensor are on the same axle.

According to the present invention, a wheel detection sensor including a transmission photoelectric sensor is disposed in the vicinity of the ground surface so that transmitted light is irradiated in the vehicle width direction, so that the wheel is actually out of the entire wheel. It is possible to reliably detect only a portion close to a range where the ground is touched.
And in the discriminating means, among the wheel detection signals obtained by the wheel detection sensor, the time difference between the detection start time of the wheel that first passes through the wheel detection sensor and the detection start time of the wheel that passes immediately after that is passed first. When the value divided by the detection time length of the wheel to be detected is less than the reference value, it is determined that the wheel that passes the wheel detection sensor first and the wheel that passes immediately after that are on the same axle. On the other hand, even when the vehicle passes obliquely, the positions of the left and right wheels on the same axle can be accurately grasped.

  In the present invention, a vehicle body length detection unit is provided in the detection area, and the determination unit includes a detection signal of a wheel that first passes through a wheel detection sensor during detection of the vehicle body length, and its detection signal. Two sets of detection signals for wheels passing immediately after are obtained, and obtained by detection of the first set, obtained by detection time length of wheels passing through the wheel detection sensor first, and detection of the second set, Control logic for determining that the size of the front and rear wheels of the vehicle passing through the detection area is the same when the ratio of the detection time length of the wheel passing through the wheel detection sensor is within a predetermined range. Desirably included.

  According to the present invention, in the discrimination means, the detection time length of the wheel passing through the wheel detection sensor first obtained by detection of the first set, that is, the size of one of the left and right wheels of the front wheel is used as a reference. Even if the vehicle passes diagonally with respect to the detection area by measuring the detection time length of the wheel that passes through the wheel detection sensor first, that is, the size of the rear wheel, obtained by the detection of the set eye It is possible to accurately grasp the difference in size between the front and rear wheels.

In the present invention, the discriminating means judges that the vehicle passing through the detection area has a wheel arrangement inappropriate for warehousing, unless it is judged that the front and rear wheels have the same size. It is desirable to include control logic.
According to the present invention, even when the vehicle passes obliquely with respect to the detection area, the discriminating means grasps the vehicle having different front and rear wheel sizes that cannot be parked in the mechanical parking device. It is possible to reliably prevent erroneous entry into the mechanical parking device.

In the present invention, the discriminating means determines that the wheel passing through the wheel detection sensor first and the wheel passing immediately after the wheel detection sensor are on the same axle from any of the two sets of wheel detection signals. Except in the case where the vehicle passes through the detection area, it is preferable that the vehicle includes control logic for determining that the wheel arrangement is inappropriate for warehousing.
According to the present invention, when the vehicle passes obliquely with respect to the detection area, if it is not determined that the wheel that passes through the wheel detection sensor first and the wheel that passes immediately after that are on the same axle, the front and rear axles Since the position of the left and right wheels cannot be accurately grasped, it is judged that the wheel is inappropriate for warehousing by the discriminating means, and the vehicle machine is uncertain about the dimensions of each part of the vehicle body. It is possible to reliably prevent erroneous entry into the parking system.

  Since the present invention is configured as described above, even when the vehicle enters the vehicle type determination area obliquely, the vehicle wheel determination in the mechanical parking device is performed accurately and quickly, and the vehicle type determination accuracy is increased. It becomes possible.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.
The vehicle type detection area 10 of the mechanical parking device shown in FIG. 1 and FIG. 2 is provided with a detection device for protrusions at the bottom of the vehicle body according to the embodiment of the present invention. This vehicle type detection area 10 is where the vehicle 12 enters in the direction of arrow F by self-propelled. At a location near the entrance of the vehicle type detection area 10, a minimum ground height detection device 14, a vehicle height detection device 16, a vehicle rear end detection device 18, and a vehicle width detection device 20 are provided. Furthermore, a warehousing button box 22, a vehicle front end detection device 24, a destination guide lamp 26, and a car gate 28 are provided toward the exit of the vehicle type detection area 10. The vehicle rear end detection device 18 and the vehicle front end detection device 24 constitute a vehicle body length detection means. Among the above detection devices, a transmissive photoelectric sensor is used for the lowest ground height detection device 14, the vehicle height detection device 16, the vehicle rear end detection device 18, and the vehicle front end detection device 24, and the vehicle width detection device 20. For this, an ultrasonic sensor is used. In addition, the said structure is the same also in a prior art (patent document 1).
The lowest ground height detection device 14 and the discrimination means 30 constitute a vehicle wheel discrimination device 32 according to the embodiment of the present invention. The discriminating means 30 is constituted by an electronic computer and is schematically shown as an independent block in the illustrated example, but may be incorporated as a part of a vehicle type discriminating device, or may be a control of a mechanical parking device. It may be included in the system.

Now, the lowest ground height detection device 14 of the vehicle wheel discriminating device 32 according to the embodiment of the present invention, as shown in FIG. 3, a wheel detection sensor 34 disposed in the vicinity of the ground surface GL, Two sensors including a protrusion detection sensor 36 disposed at a position higher than the wheel detection sensor 34 are provided. Both the wheel detection sensor 34 and the protrusion detection sensor 36 are transmissive photoelectric sensors. The wheel detection sensor 34 is provided as close as possible to the ground surface GL between the ground surface GL and the minimum ground clearance of the vehicle, so that the wheel is actually grounded in the entire wheel 38 (FIG. 2). Only a portion close to the range (indicated by reference numerals 381a, 382a, 383a, and 384a in FIG. 5A) can be reliably detected. On the other hand, the protrusion detection sensor 36 is higher than the wheel detection sensor 34 and can detect protrusions on the bottom of the vehicle body other than the wheels 38. For reference, the protrusion detection sensor 36 is in front of the vehicle detection direction (arrow F) of the wheel detection sensor 34, and the sensor centers C ₃₄ and C _{36 of} both sensors are assumed to be wheels having the smallest radius (for example, The wheels of the light vehicle are disposed so as to be separated within a range in which both sensors 34 and 36 can start detection at the same time. In the illustrated example, the height of the wheel detection sensor 34 from the ground surface is 40 mm, the height of the protrusion detection sensor 36 from the ground surface is 70 mm, and the distance between the sensor centers C ₃₄ and C ₃₆ of both sensors in the front-rear direction. Is 130 mm.

  Next, a vehicle wheel determination method according to an embodiment of the present invention will be described with reference to FIGS. Here, FIG. 4 shows a specific vehicle wheel discrimination procedure. 5 and 6 are related to FIG. 4 and show how the relative positional relationship between the wheel detection sensor 34 and the vehicle 12 changes when the vehicle 12 passes through the vehicle type detection area 10 at an angle. This is a plan view.

In addition, in each determination step (40), (60), (80), (90) in the flowchart of FIG. 4, each determination criterion indicated by a symbol is as follows.
[I-α]: {(detection start time of wheel 382) − (detection start time of wheel 381)} / (detection time length of wheel 381) <1.0
This is a condition for determining that the two wheels 381 and 382 are on the same axle from the detection signal of the wheel 381 that passes through the wheel detection sensor 34 and the detection signal of the wheel 382 that passes immediately after that. If the two wheels 381 and 382 are on the same axle, even if the vehicle 12 passes obliquely through the vehicle type detection area 10, the two wheels 381 and 382 are close to each other, and detection of both wheels is started. It pays attention to the fact that the time difference of the time is also reduced.
[I-β]: {(detection start time of wheel 384) − (detection start time of wheel 383)} / (detection time length of wheel 383) <1.0
This is a condition for determining that the two wheels 383 and 384 are on the same axle from the detection signal of the wheel 383 that passes through the wheel detection sensor 34 and the detection signal of the wheel 384 that passes immediately after that. If the two wheels 383 and 384 are on the same axle, even if the vehicle 12 obliquely passes through the vehicle type detection area 10, the two wheels 383 and 384 are close to each other, and detection of both wheels is started. It pays attention to the fact that the time difference of the time is also reduced.
[II-γ]: 0.6 <{(detection time length of wheel 383) / (detection time length of wheel 381)} <3.0
This is a condition for determining that the front and rear wheels have the same size. When this value is 0.6 or less, the portion detected later is determined as a projection other than the wheel. When this value is 3.0 or more, it is determined that the wheel detected later is larger than the front wheel or a protrusion other than the wheel.
[III]: Both conditions [I-α] and [I-β] are satisfied during detection of the vehicle body length.
This is a condition for determining that the detected wheel is provided in one vehicle.
In addition, the numerical value in the said determination conditions has calculated | required the value suitable for each determination by inventors by experiment.

The vehicle wheel discriminating procedure according to the embodiment of the present invention is as follows.
(10) The vehicle 12 enters the wheel detection sensor 34 obliquely.
(20) As shown in FIG. 5A, one front wheel 381 of the vehicle 12 blocks the transmitted light L of the wheel detection sensor 34, and the detection signal of the wheel detection sensor 34 is turned ON. At this time, since the wheel detection sensor 34 is disposed in the vicinity of the ground surface, the transmitted light L is not blocked by the wheel 382, and only the portion 381a close to the range where the wheel 381 is actually grounded out of the entire wheel 381. Can be reliably detected (the same applies to the other wheels 382, 383, and 384). When the front wheel 381 passes the position of the wheel detection sensor 34, the detection signal of the wheel detection sensor 34 is turned off (or the non-detection signal is turned on. The same applies hereinafter).
(30) Subsequently, as shown in FIG. 5B, the other front wheel 382 of the vehicle 12 blocks the transmitted light L of the wheel detection sensor 34, and the detection signal of the wheel detection sensor 34 is turned ON again. Become. And if the front wheel 382 passes the position of the wheel detection sensor 34, the detection signal of the wheel detection sensor 34 will be OFF.
(40) Here, when the determination criterion [I−α] is not satisfied, the determination unit 30 determines that the vehicle 12 is inappropriate for warehousing. On the other hand, when the determination criterion [I−α] is satisfied, the wheel determination operation is continued.

(50) As shown in FIG. 6C, one rear wheel 383 of the vehicle 12 blocks the transmitted light L of the wheel detection sensor 34, and the detection signal of the wheel detection sensor 34 is turned ON. When the rear wheel 383 passes the position of the wheel detection sensor 34, the detection signal of the wheel detection sensor 34 is turned off.
(60) Here, when the determination criterion [II−γ] is not satisfied, the determination unit 30 determines that the vehicle 12 is inappropriate for warehousing. On the other hand, when the determination criterion [II−γ] is satisfied, the wheel determination operation is continued.
(70) As shown in FIG. 6D, the other rear wheel 384 of the vehicle 12 blocks the transmitted light L of the wheel detection sensor 34, and the detection signal of the wheel detection sensor 34 is turned ON. When the rear wheel 384 passes the position of the wheel detection sensor 34, the detection signal of the wheel detection sensor 34 is turned off.
(80) Here, when the determination criterion [I−β] is not satisfied, the determination unit 30 determines that the vehicle 12 is inappropriate for warehousing. On the other hand, when the determination criterion [I-β] is satisfied, the process proceeds to the following step (90).
(90) Here, when the determination criterion [III] is not satisfied, the determination unit 30 determines that the vehicle 12 is inappropriate for warehousing.
(100) In step (90), when the determination criterion [III] is satisfied, the determination unit 30 determines that the wheel arrangement of the vehicle 12 is appropriate for warehousing and that the wheel arrangement is OK.

  In the above procedure, the discriminating means 30 detects that the detection signal of the wheel detection sensor 34 is detected in the order of ON, OFF, ON, OFF (steps (20) and (30), steps (50) and (70)). The value obtained by dividing the time difference between the detection start time of the previous ON signal and the detection start time of the subsequent ON signal by the detection time length of the previous ON signal is less than the reference value (1.0). At this time, it is determined that both the previous ON signal and the subsequent ON signal are detection signals relating to wheels on the same axle (steps (40) and (80)).

  Further, the determination means 30 finally determines that the wheel arrangement is OK (step (100)). (A) The detection signals of the order of ON, OFF, ON, OFF of the wheel detection sensor 34 are two sets. (The first set includes steps (20) and (30), and the second set includes steps (50) and (70).) (A) In addition, in each set, the previous ON signal detection start time And the value obtained by dividing the time difference from the detection start time of the subsequent ON signal by the detection time length of the previous ON signal is less than the reference value (1.0) (steps (40) and (80)), (C) Further, the detection time length of the wheel 381 that first passes through the wheel detection sensor 34 obtained by detection of the first set and the wheel that passes through the wheel detection sensor 34 obtained by detection of the second set. The ratio to the detection time length of 383 is predetermined.囲内 (greater than 0.6, and less than 3.0) is limited to when it is in (step (60)).

The effects obtained by the embodiment of the present invention having the above-described configuration are as follows.
First, according to the embodiment of the present invention, the wheel detection sensor 34 composed of a transmission type photoelectric sensor is arranged in the vicinity of the ground surface GL so that the transmitted light L is irradiated in the vehicle width direction. Of the entire wheel 38, only the portions 381a, 382a, 383a, 384a close to the range where the wheel 38 is actually grounded can be reliably detected.
And in the discriminating means 30, among the wheel detection signals obtained by the wheel detection sensor 34, the detection start time of the wheel 381 (or 383) passing through the wheel detection sensor 34 first and the wheel 382 (or 384) passing immediately after that are detected. ), When the value obtained by dividing the time difference from the detection start time by the detection time length of the wheel 381 (or 383) that passes first is less than the reference value (1.0), the wheel detection sensor 34 is passed first. It is determined that the wheel 381 (or 383) and the wheel 382 (or 384) passing immediately after that are on the same axle. Thereby, even if it is a case where the vehicle 12 passes diagonally with respect to the detection area 10, the position of the right and left wheels on the same axle can be grasped correctly.

  Further, according to the embodiment of the present invention, in the determination means 30, the detection time length of the wheel 381 that first passes through the wheel detection sensor 34 obtained by the first set of detection, that is, one of the left and right wheels of the front wheel Based on the size of 381, the detection time length of the wheel 383 passing through the wheel detection sensor, that is, the size of the rear wheel 383 obtained by the second set of detections, that is, the size of the rear wheel 383 is measured. On the other hand, even when the vehicle 12 passes diagonally, the difference in the size of the front and rear wheels can be accurately grasped.

  Further, the discriminating means 30 includes control logic for determining that the wheel arrangement is inappropriate for warehousing except when the front and rear wheels are determined to have the same size (step (60)). Even if the vehicle 12 passes obliquely with respect to the detection area 10, the discrimination means 30 grasps a vehicle in which the size of the front and rear wheels is different and cannot be parked in the mechanical parking device, It is possible to reliably prevent erroneous entry into the parking system.

The discriminating means 30 includes a wheel 381 (or 383) that first passes through the wheel detection sensor 34 and a wheel 382 (or 384) that passes immediately after the wheel detection sensor 34 from the two sets of wheel detection signals. Except for the case where it is determined to be above, control logic for determining that the wheel arrangement is inappropriate for warehousing is included (step (90)).
That is, when the vehicle 12 passes obliquely with respect to the detection area 10, the wheel 381 (or 383) that first passes through the wheel detection sensor 34 and the wheel 382 (or 384) that passes immediately after that are on the same axle. If it is not judged that there is, it is impossible to accurately grasp the positions of the left and right wheels of the front and rear axles, so it is judged that the wheel arrangement is inappropriate for warehousing, and it is uncertain about the dimensions of each part of the car body Thus, it is possible to surely prevent the vehicle from erroneously entering the mechanical parking device.

  In the embodiment of the present invention, since the relative value of the detection time is a problem at the time of wheel discrimination, the passing speed of the vehicle 12 does not matter so much, but the passing speed of the vehicle 12 in the detection area 10 is as follows. Assuming about 3 km / h.

It is a top view of the vehicle type detection area of the mechanical parking apparatus provided with the wheel discriminating device of the vehicle according to the embodiment of the present invention. It is a side view of the vehicle type detection area of FIG. It is a figure which shows the lowest ground height detection apparatus of the detection detection apparatus of the protrusion of the vehicle body based on embodiment of this invention, (a) is a front view, (b) is BB sectional drawing of (a). (C) is AA sectional drawing of (a). It is a flowchart which shows the vehicle wheel discrimination | determination procedure based on embodiment of this invention. FIG. 4A is a plan view showing a change in the relative positional relationship between the wheel detection sensor and the vehicle when the vehicle passes obliquely with respect to the vehicle type detection area, and FIG. (B) relates to step (30) in FIG. FIG. 4 is a plan view showing a change in the relative positional relationship between the wheel detection sensor and the vehicle when the vehicle passes obliquely with respect to the vehicle type detection area, and FIG. (D) relates to step (70) in FIG.

Explanation of symbols

  10: Vehicle type detection area, 12: Vehicle, 14: Minimum ground height detection device, 18: Vehicle rear end detection device, 24: Vehicle front end detection device, 30: Discrimination means, 32: Vehicle wheel discrimination device, 34: Wheel Detection sensor, 36: protrusion detection sensor, 38, 381, 382, 383, 384: wheel

Claims (8)

A method of detecting wheels of a vehicle passing through a detection area of a mechanical parking device,
In the vicinity of the ground surface, transmitted light is irradiated in the vehicle width direction, and a wheel detection sensor composed of a transmission type photoelectric sensor is arranged,
Among the wheel detection signals obtained by the wheel detection sensor, the time difference between the detection start time of the wheel that first passes through the wheel detection sensor and the detection start time of the wheel that passes immediately thereafter is detected as the wheel that passes first. When the value divided by the time length is less than a reference value, it is determined that the wheel that passes the wheel detection sensor first and the wheel that passes immediately after the wheel detection sensor are on the same axle. A method for discriminating vehicle wheels in the apparatus. A vehicle length detection means is provided in the detection area, and during detection of the vehicle length, a detection signal for a wheel that passes through the wheel detection sensor and detection of a wheel that passes immediately after that are obtained by the wheel detection sensor. Two sets of signals are obtained, and the detection time length of the wheel passing through the wheel detection sensor first obtained by detection of the first set and the wheel detection sensor obtained by detection of the second set are first. 2. The front and rear wheels of the vehicle passing through the detection area are determined to have the same size when the ratio with the detection time length of the passing wheel is within a predetermined range. A vehicle wheel discriminating method in a mechanical parking apparatus. 3. The mechanical system according to claim 2, wherein the vehicle passing through the detection area is determined to have an unsuitable wheel arrangement for warehousing unless it is determined that the sizes of the front and rear wheels are the same. A wheel determination method for a vehicle in a parking apparatus. From any of the two sets of wheel detection signals, the vehicle passes through the detection area unless it is determined that the wheel that first passes through the wheel detection sensor and the wheel that passes immediately after that are on the same axle. 4. The vehicle wheel discriminating method in the mechanical parking device according to claim 2, wherein the vehicle is determined to have an unsuitable wheel arrangement for warehousing. A device for detecting wheels of a vehicle passing through a detection area of a mechanical parking device,
In the vicinity of the ground surface, transmitted light is irradiated in the vehicle width direction, a wheel detection sensor composed of a transmission type photoelectric sensor is disposed, and
Among the wheel detection signals obtained by the wheel detection sensor, the time difference between the detection start time of the wheel that first passes through the wheel detection sensor and the detection start time of the wheel that passes immediately thereafter is detected as the wheel that passes first. When the value divided by the time length is less than a reference value, a determination means including processing logic for determining that the wheel that passes the wheel detection sensor first and the wheel that passes immediately after the wheel detection sensor are on the same axle. A vehicle wheel discriminating device in a mechanical parking device. A vehicle body length detection means is provided in the detection area, and the determination means includes a detection signal of a wheel that passes through a wheel detection sensor first and a wheel that passes immediately after the detection of the vehicle body length. Two detection signals are obtained, and the detection time length of the wheel passing through the wheel detection sensor first obtained by the detection of the first set and the wheel detection sensor obtained by the detection of the second set are first. Control logic for determining that the size of the front and rear wheels of the vehicle passing through the detection area is the same when the ratio to the detection time length of the wheels passing through the vehicle is within a predetermined range. The vehicle wheel discriminating device in the mechanical parking device according to claim 5 The discriminating means includes control logic for judging that the vehicle passing through the detection area has an inappropriate wheel arrangement for warehousing, unless the front and rear wheels are determined to have the same size. The vehicle wheel discriminating device in the mechanical parking device according to claim 6. In the determination means, unless any of the two sets of wheel detection signals is determined that the wheel that passes through the wheel detection sensor first and the wheel that passes immediately after that are on the same axle, 8. The vehicle wheel discriminating device in the mechanical parking device according to claim 6, wherein a control logic for judging that the vehicle passing through the detection area has a wheel arrangement inappropriate for warehousing is included.

Images