JPH09102100A - Vehicle number management device - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To appropriately count optical sensor units, accurately count the number of vehicles passing through an entrance / exit of a parking lot, and notify the parking status. I will provide a. SOLUTION: A plurality of optical sensor units 1 are arranged in a plurality of raceways 10, an interval W of the optical sensor units 1 of the raceway 10 is shorter than a width Wo of a vehicle, and an interval L of the raceways 10 is set to a vehicle. Is set to be shorter than the vehicle length Lo of the vehicle, and the in-vehicle information processing device 6 counts the vehicle passages one by one from the vehicle passage pattern based on the sensor information from the optical sensor unit 1, and the display board 4 displays an empty vehicle in the parking lot. The number of vehicles is displayed and the parking status is displayed on the in-vehicle information processing device 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a parking number management device for managing the number of parked vehicles by counting the number of vehicles entering and leaving by using an optical sensor unit.

[0002]

2. Description of the Related Art In a conventional parking number management device, a sensor comprising a transmitting part and a receiving part (or a light emitting part and a light receiving part) is arranged so as to face each other, and a vehicle passes through an entrance / exit of a parking lot and an ultrasonic wave or an optical wave is transmitted. There is a known parking lot number management device configured to detect the number of passing vehicles by blocking the vehicle.

Further, the applicant of the present invention was disclosed by JP-A-6-266.
As disclosed in Japanese Patent No. 999, the ultrasonic sensor unit is arranged from above the entrance of the parking lot toward the road surface,
A plurality of the ultrasonic sensor units are provided in the passage width direction at intervals shorter than the vehicle width, and a plurality of these ultrasonic sensor units are provided in the passage length direction at intervals shorter than the vehicle length, and the vehicle based on sensor information from the plurality of ultrasonic sensor units. There is also known a vehicle number management device that manages the number of parked vehicles by counting the number of vehicles entering and leaving the vehicle.

[0004]

However, in order to improve the detection accuracy of only the vehicle, the conventional number-of-parked-vehicles management device has the following problems.
In many cases, the transmission unit (light emitting unit) and the reception unit (light receiving unit) of the sensor are opposed to each other in the vertical direction between the ceiling and the road surface, and the parking lot number management device equipped with such an opposed sensor in the existing parking lot. There is a problem that road surface construction is required when installing the.

Further, the applicant of the present invention was disclosed by JP-A-6-266.
A vehicle number management device that manages the number of parked vehicles by counting the number of vehicles entering and leaving by using a plurality of ultrasonic sensor units disclosed in Japanese Patent Publication No. There is a problem that it is not possible to count the number of vehicles passing through at high speed because intermittent driving is performed by switching the ultrasonic wave propagation speed and its propagation distance and operating for a predetermined time determined by the processing time of the sensor information from the ultrasonic sensor unit.

The present invention has been made to solve the above problems, and an object thereof is to provide a vehicle number management device suitable for a self-propelled parking lot, which can surely count the number of vehicles passing at a high speed. Especially.

[0007]

In order to solve the above-mentioned problems, the vehicle number management device according to claim 1 directs an optical sensor unit comprising a light emitting portion and a light receiving portion from above the entrance of the parking lot toward the road surface. These optical sensor units are provided in the passage width direction at intervals shorter than the vehicle width, and in the passage length direction at intervals shorter than the vehicle length, based on sensor information from multiple sensor units. The number of vehicles entering and leaving the vehicle is counted to manage the number of parked vehicles.

The vehicle number management device according to a second aspect of the present invention is an optical system in which an optical sensor unit of an object reflection type is used as an optical sensor unit to focus on a road surface and the reflected light from the road surface is received. The number of vehicles entering and leaving the vehicle based on the comparison result between the sensor information from the optical sensor unit and the reference sensor information when the reflected light from the vehicle is received with the sensor information from the sensor Is counted.

Further, the vehicle number management device according to a third aspect is characterized in that the road surface is formed of a substance having a high light reflectance.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an overall configuration diagram of a vehicle number management device according to the present invention. In FIG.
The vehicle number management device includes a plurality of U-shaped raceways 10 (three in FIG. 1) installed across the entrance and exit passages of a self-propelled parking lot, and light-emitting units attached to the respective raceways 10. And a plurality of optical sensor units 1 each including a light receiving portion, and a relay that controls the operation of the optical sensor units 1, receives sensor information from the optical sensor units 1, and relays the sensor information to a communication controller. The operation of the relay 2 and the relay 2 is controlled, and the sensor information from the relay 2 is sent to the in-vehicle information processing device 6.

By configuring the vehicle number management device in this way, the communication controller 3 for controlling the display of the number of empty vehicles on the display board 4 based on the vehicle number data from the in-vehicle information processing device 6, and the communication controller 3 It is possible to centrally manage the parking status such as counting the increase and decrease of passing vehicles, setting and changing the number of parked vehicles, and displaying the total number of parked vehicles based on the sensor information of 1.

Further, FIG. 1 shows a structure for a one-floor parking lot, but the communication controller 3 and the in-vehicle information processing device 6 are common, and the optical sensor unit 1, the repeater 2 and the display board 4 are grouped by one group. It is possible to easily apply to a self-propelled parking lot having a plurality of floors by configuring the above as a plurality of groups.

Further, FIG. 1 shows an embodiment in which the entrance and the exit of the self-propelled parking lot are the same, but even when the entrance and the exit are provided separately, the entrance and the exit of each floor are By installing the optical sensor unit 1 and the repeater 2 which are respectively attached to the raceways 10, the display board 4 at the entrance of each floor, and the communication controller 3 and the vehicle information processing device 6 are commonly installed on all floors. A vehicle number management device can be configured. When the entrance of the parking lot has a ceiling, the raceway 10 may be omitted and the optical sensor unit 1 may be arranged on the ceiling.

In FIG. 1, when a vehicle passes through three entrances to a parking lot and passes through three raceways 10, the vehicle is detected by the optical sensor unit 1 and counted as an entry, and a parking lot display plate on the corresponding floor. 4, the number of empty vehicles at that time is displayed, and the number of parked vehicles (or the number of empty vehicles) at each parking lot is also displayed on the in-vehicle information processing device 6.

FIG. 2 is an overall block diagram showing an example of a vehicle number management system according to the present invention. In FIG.
The vehicle number management device has a group, which is installed on the first floor (1F) and includes, for example, an optical sensor unit 1 including 12 light emitting units and light receiving units S1 to S12 and a repeater 2, as one unit. A group having the same structure as the unit is composed of N (N floor), the communication controller 3 and the in-vehicle information processing device 6 common to the N groups.

Further, the display plates (1 to N) 4 and the full vehicle indicator lights (1 to N) 5 are installed on each floor to notify the driver of the parking status. The in-vehicle information processing device 6 is composed of a personal computer, an operation unit (keyboard) 6A, etc., and is used to set and change the data required for vehicle number management, and the number of parked cars in each (floor) parking lot, the number of vacant cars, and the latest entry. Display car / departure time, etc.

Optical sensor unit 1 (S1 to S12)
The light sensor unit of emits light, receives reflected light,
The sensor information is sent to the repeater 2. Further, the optical sensor unit 1 (S1 to S12) is provided with a reflective surface having a high reflectance on the road surface, and the light emitting unit focuses light on the reflective surface and emits light at predetermined time intervals. The reflected light of the light is received by the light receiving part and this amount of light is used as a reference, and the light receiving amount of the light reflected from an object other than the reflective surface on the road surface is significantly reduced, and sensor information is created from the comparison result of both. Then, this sensor information is sent to the repeater 2. The reflective surface may be formed by providing a material having a high reflectance on the road surface or by applying paint or the like on the road surface to form the reflective surface.

The repeater 2 is the optical sensor unit 1 (S
1 to S12), and sends the sensor information from the optical sensor unit 1 to the communication controller 3.

The communication controller 3 is a repeater 2 of each parking lot.
Control is performed to operate (1 to N) at a predetermined timing, and sensor information from the relay 2 (1 to N) is sent to the in-vehicle information processing device 6. Further, the communication controller 3 controls the display of the number of parked vehicles on the display plate 4 and the full vehicle indicator lamp 5 provided in each parking lot, based on the vacant or full vehicle information from the in-vehicle information processing device 6.

The in-vehicle information processing device 6 determines the presence / absence of a vehicle based on the sensor information from the communication controller 3, and determines the entry / exit of the vehicle based on a preset vehicle passage sequence. To count up or down. Further, the in-vehicle information processing device 6 performs data setting and change required for vehicle number management and vehicle passing sequence setting from the operation unit (keyboard) 6A, and sets the number of parked cars in each (floor) parking lot, the number of vacant cars, The latest entry / exit time etc. is displayed on the display.

In this way, the optical sensor unit consisting of twelve light emitting portions and light receiving portions (S1 to S12) is arranged from above the entrance of the parking lot toward the road surface, and the optical sensor unit is installed in the passage. Four units are provided in the width direction at intervals shorter than the vehicle width, and three units are provided in the passage length direction at intervals shorter than the vehicle length. Based on sensor information from a total of 12 sensor units, the number of vehicles entering and leaving The number of vehicles can be surely counted, and the number of vehicles passing through at high speed can be surely counted.

FIG. 3 is a block diagram of the optical sensor unit according to the present invention. In FIG. 3, the optical sensor unit 1 includes photocouplers 11 and 12, a forward pulse generating means 13, a sensor unit number generating means 14, a light emitting section 15, a light receiving section 16, a low-pass filter 17, a capturing means 18, and sensor information encoding. Means 19 and 3-state buffer 20 are provided. The photocouplers 11 and 12 are
The forward feed pulse a (i-1) and the synchronization pulse b (i-1) are respectively received from the repeater 2, and the forward feed pulse generating means 1 is received.
Send to 3.

Further, the photocoupler 12 uses the synchronizing pulse b
The same synchronization pulse b (i) as (i-1) is transmitted. It should be noted that the plurality of optical sensor units (S1 to S12 in FIG. 2) are configured to be connected in cascade, and the output side of the optical sensor unit 1 of sensor unit number 1 is the optical sensor unit 1 of sensor unit number 2. Connected to the input side,
The progressive pulse a (1) and the synchronization pulse b (1) are input to the photocouplers 11 and 12 of the optical sensor unit 1, respectively.

The forward feed pulse generating means 13 enters a sync pulse receiving state at the trailing edge of the forward feed pulse a (i-1), is set by the sync pulse b (i), holds the set state for a predetermined period, and holds the sync pulse b. The forward feed pulse a (i) which is reset in (i) is generated. The progressive pulse generating means 13 supplies the output signal a (i) to the light emitting section 15, the capturing means 18, the sensor information encoding means 19 and the three-state buffer 20, and the optical sensor unit 1 at the stage of the output signal a (i). Output to.

The light emitting unit 15 and the light receiving unit 16 emit light from the light emitting unit while focusing on the reflecting surface on the road surface, and the light is received by the light receiving unit with respect to the reflected light reflected by the reflecting surface on the road surface. The sensitivity is adjusted to the maximum, and as a result, the reflected light reflected from objects other than the reflective surface on the road surface has a different entrance angle to the reflected light reflected by the reflective surface on the road surface The light receiving sensitivity at is significantly reduced. The light emitting portion 15 emits light during the set state of the progressive pulse a (i) when the progressive pulse a (i) is input. The light receiving unit 16 receives the reflected light of the light emitted from the light emitting unit and outputs the sensor information e (i) according to the amount of received light.

The sensor information e (i) from the light receiving unit 16 is input to the capturing means 18 as the sensor information f (i) obtained by attenuating the unnecessary high frequency component by the low pass filter 17. The capturing means 18 captures the sensor information f (i) in the set state of the forward feed pulse a (i) a plurality of times with the synchronization pulse b (i). Further, the capturing means 18 captures the sensor information f (i) when the reflected light from the reflecting surface on the road surface is received, that is, when there is no passing vehicle, by the synchronizing pulse b (i) a plurality of times, and a plurality of times. The sensor information f (i) is compared with a prestored threshold value, a plurality of comparison results are subjected to a majority decision processing to determine a high level H, and the g (i) signal is sent to the sensor information encoding means 19. Output. Further, the capturing means 18 captures the sensor information f (i) when there is a passing vehicle a plurality of times with the synchronization pulse b (i), and outputs the sensor information f (i) captured a plurality of times and the threshold value stored in advance. The plurality of comparison results are compared with each other, a majority operation is performed to determine a low level L, and a g (i) signal is output to the sensor information encoding means 19.

The sensor information coding means 19 receives the sensor unit number signal i from the sensor unit number generating means 14 and the sensor information f (i) from the fetching means 18.
The sensor information is created and encoded from the sensor information signal d
(I) is output to the 3-state buffer 20.

The 3-state buffer 20 has a forward pulse a.
The sensor information encoding means 1 only during the set state of (i)
The sensor information signal d (i) input from 9 is output to the repeater 2 as a c (i) output signal, and is 3 in other periods.
The output terminal of the state buffer 20 is electrically disconnected from the repeater 2.

FIG. 4 is a signal waveform of each part of the optical sensor unit of FIG. Symbols (1) to (6) in the figure are signal waveforms of respective parts of the optical sensor unit 1 of FIG.
(1) is a waveform of the forward feed pulse a (i-1) input from the optical sensor unit 1 having the sensor unit number (i-1).

(2) is a waveform of the forward feed pulse a (i) of the optical sensor unit 1 having the sensor unit number (i), and the sensor unit number (i-
1) The synchronization pulse acceptance state is set at the trailing edge of the forward pulse a (i-1) input from the optical sensor unit 1 and is set by CK (0) of the synchronization pulse b (i), and set for a predetermined period. Holds the state and synchronizes pulse b
It is reset by CK (r) in (i).

(4) is a sensor information f (i) waveform obtained by attenuating unnecessary high frequency components from the output signal of the light receiving section 16 by a low pass filter. The sensor information f (i) when there is no passing vehicle has a high level H, and the sensor information f (i) when there is a passing vehicle has a low level L. G of (5)
(I) is the output waveform of the capturing means that has captured the sensor information f (i) at the rising edge of the synchronization pulse b (i).

(6) c (i) shows the structure of the sensor information. The sensor information c (i) is composed of an m-bit synchronizing signal S, a 1-bit sensor unit number i, 1-bit data D (i), and q-bit parity bit P. When the sensor information c (i) to be transmitted is received by the receiving side, the synchronization signal S is used for clock recovery for reliably capturing the sensor information c (i) and for reliably capturing it. Further, it is desirable that the synchronization signal S be a bit pattern having a low appearance frequency.

The parity bit P is received by the receiving side of the transmitted sensor information c (i), and the received sensor information c (i) is received.
(I) is a code for detecting the presence or absence of an error and correcting the error as necessary, and the configuration of this code is sensor information c (i).
It depends on the state of the transmission line and the reliability required for this device.

As described above, the sensor information from the optical sensor unit is captured a plurality of times by the synchronization pulse, the sensor information captured a plurality of times is compared with the threshold value stored in advance, and the comparison result of the plurality of comparisons is obtained. Since the high level H or the low level L is determined by performing a majority decision calculation on the above, it is possible to prevent the detection error of the passing vehicle due to the disturbance.

Further, since the sensor unit number is added to the determination result based on the sensor information, the determination result based on the plurality of sensor information can be processed surely and easily.

Further, since a parity bit is added to the determination result based on the sensor information and the sensor unit number, if an error occurs in the transmitted sensor information signal, it is possible to confirm that the transmitted sensor information signal has an error. Since it can be detected and the error can be corrected, the detection error of the passing vehicle can be prevented.

FIG. 5 is a block diagram of a repeater according to the present invention. In FIG. 5, the repeater 2 includes a sync pulse generation circuit 21, a forward pulse generation circuit 22, a relay buffer 23, a photo coupler 24, and a photo coupler 25.

The sync pulse generation circuit 21 and the forward feed pulse generation circuit 22 provide the sync pulse b (1) and the forward feed pulse a (1) to the photocouplers 12 and 11 of the optical sensor unit 1 having the sensor unit number 1, respectively. . The relay buffer 23 includes the optical sensor unit 1 (for example, 1F).
The sensor information c sent from S1 to S12) is provided to the communication controller 3.

The photocoupler 24 receives the forward feed pulse a (n = 12) from the forward feed pulse generating means 13 of the optical sensor unit 1 of the sensor unit number n (= 12), and feeds it to the forward feed pulse generating means 22. (N = 1
2) is supplied. The progressive feed pulse generating means 22 receives the progressive feed pulse a (n = 12) from the photocoupler 24 and outputs the progressive feed pulse a (1) to the optical sensor unit 1 of sensor unit number 1.

FIG. 6 is a block diagram of the essential parts of the in-vehicle information processing apparatus according to the present invention. In FIG. 6, the in-vehicle information processing device 6 includes a vehicle passage determination unit 31, a sequence unit 32,
The counter unit 33, the display drive unit 34, the display unit 35, and the like are provided. The vehicle passing determination unit 31 determines that the sensor information c from the communication controller 3 has a predetermined pattern and the sequence unit 3
It is determined whether or not the order is the same as that set in 2, and if the order is the same, it is determined that the vehicle has passed, and the passing determination signal 31a
Is sent to the counter unit 33. In addition, the vehicle passage determination unit 31
If the sensor information c matches the entry sequence,
+1 count, -1 if it matches the departure sequence
The counter unit 3 receives the passage determination signal 31a for counting.
Configure to send to 3.

The counter unit 33 increments or decrements the count number based on the passage determination signal 31a from the vehicle passage determination unit 31 to integrate the number of parked cars on each floor, or the set number of cars filled and the total number of cars. Of the number of stored signals 33a is sent to the display drive unit 34,
The display drive unit 34 sends the display signal 6a to the display unit 35,
The number of parked cars and the number of vacant cars can be displayed, and the number of vacant cars can be displayed on the display board 4 via the communication controller 3.

FIG. 7 is an explanatory view showing an example of the arrangement of the optical sensor units of the vehicle number management system according to the present invention. In FIG. 7, (a) shows the arrangement of the raceway 10 and the optical sensor unit 1, and the optical sensor unit 1 is mounted on each of the raceways 10 (three of A to C), and each of the four units is mounted on the raceway. The arrangement intervals of the optical sensor units 1 on the way 10 are W and raceways A to C.
Is set to L.

On the other hand, the vehicle 30 has a width Wo and a vehicle length L.
o (For example, a light car has a vehicle width of 1.4 m and a vehicle length of 3.3
m), the arrangement interval W of the optical sensor unit 1 is set smaller than the vehicle width Wo (W <Wo), and when the vehicle 30 passes each raceway, the vehicle width Wo direction is surely set on each raceway 10. In addition, it is configured so that it can be detected by one or more optical sensor units 1. In addition, the interval L of the raceway 10 is set shorter than the vehicle length Lo (L <Lo),
While the vehicle 30 is passing through the raceways 10, the vehicles 30 pass through the adjacent raceways 10 at the same time, and can be reliably detected by one or more optical sensor units 1 (two or more in total) in each raceway 10. Configure as you like.

FIG. 9B shows a sequence of entry / exit of the vehicle 30. The case where the vehicle 30 travels in the direction A from the raceway C is referred to as the entry state, and the case where the vehicle 30 travels in the direction A from the C is referred to as the departure state. First, when the vehicle 30 does not cross any of the raceways A to C in the entry state (time passage 1), all the optical sensor units 1 do not detect the vehicle 30, and the outputs of the raceways A to C All 0, A = B = C = 0 (00
0). Then, the vehicle 30 is raceway A
When only crossing (time passage 2), one or more optical sensor units 1 on the raceway A detect,
The outputs of raceways A to C are A = 1 and B = C = 0 (10
0).

Next, when the vehicle 30 crosses raceways A and B at the same time (time passage 3), raceways A and B
Since one or more optical sensor units 1 detect each, the output of raceways A to C is A = B = 1, C =
It becomes 0 (110). In the same manner, the output (011) is obtained at time passage 4 and the output is (001) at time passage 5, and the vehicle 3
0 passes Raceway C (time elapsed 6)
Then, the output becomes (000), and entry (parking) is completed.

Thus, the output sequence is (00
0), (100), (110), (011), (00
Of (1) and (000), for example, (000) and (11
By setting 0), (011), and (000) in (ABC) of the sequence unit 32 of the in-vehicle information processing device 6,
The entry of the vehicle 30 can be determined.

On the other hand, on the contrary, the vehicle 3 from the raceway C side
When 0 progresses and passes through raceway A, the output sequence (ABC) opposite to that for entry is set to, for example, (000), (011), (110), (000).
Is set in the sequence unit 32, the departure of the vehicle 30 can be determined. These are sequence patterns (110) and (011) in which the vehicle 30 is detected to be passing between adjacent raceways A and B and between B and C at the same time.
Because there exists.

By setting the interval W of the optical sensor unit 1 mounted on the raceway 10 and the interval L of the raceway 10 and the output sequence as described above, even if a person or a motorcycle passes, for example, (110), ( Since the sequence pattern of 011) does not exist, it is possible to avoid detecting and counting as a vehicle.

Further, if there is an entry and an exit at the same time, the output of each raceway A to C is A = 1, B =
Since there is a pattern such as 0 and C = 1, such a pattern is set in the sequence unit 32, and when this pattern is detected, the counting is not performed so that the number of vehicles is canceled by ± 1. The counting can be unaffected.

Furthermore, in the case where two vehicles enter in succession, the other vehicle is still in the raceway, and the vehicle behind is entering raceway A, raceway C
When the output of the race changes from 1 to 0, it is counted as one passing vehicle and the output of the raceway A changes from 0 to 1.
It is also possible to detect that there is a vehicle behind when the vehicle changes to.

Thus, in addition to the above-mentioned embodiment,
By appropriately providing the number of optical sensor units 1 mounted on the raceway 10 and the sensor unit intervals, and the number and intervals of the raceways, it is possible to reliably realize the desired number of vehicles.

FIG. 8 shows a display example of the in-vehicle information processing device.
In FIG. 8, the number of facilities and the set number of full cars can be set with the operation unit (keyboard) 6A of FIG. Display and warehousing / leaving time are updated.

In addition, the number of empty cars and the full / empty display are displayed on the display board 4 and the full car indicator light 5 provided for each floor shown in FIG. 2 so that the driver can park before passing the raceway 10. You can know whether or not.

The present invention can be modified into various embodiments other than the above-mentioned embodiments, and all of them are included in the present invention.

[0055]

As described above, in the vehicle number management device according to the first aspect, the optical sensor unit including the light emitting portion and the light receiving portion is arranged from above the entrance of the parking lot toward the road surface. A plurality of optical sensor units are provided in the passage width direction at intervals shorter than the vehicle width, and a plurality of optical sensor units are provided in the passage length direction at intervals shorter than the vehicle length. Since the number of vehicles and the number of departures can be reliably counted, and the number of vehicles passing through at high speed can be reliably counted,
The reliability of the vehicle number management device can be improved.

The vehicle number management device according to a second aspect of the present invention is an optical system in which an optical sensor unit of an object reflection type is used as an optical sensor unit to focus on a road surface and the reflected light from the road surface is received. The number of vehicles entering and leaving the vehicle based on the comparison result between the sensor information from the optical sensor unit and the reference sensor information when the reflected light from the vehicle is received with the sensor information from the sensor Therefore, the reliability of the vehicle number management device can be further improved.

Further, the vehicle number management device according to the third aspect uses an optical sensor unit including a light emitting portion and a light receiving portion, and a reflective surface provided on the road surface is provided with an object having a high reflectance, or a paint or the like is provided. Since the reflective surface is formed by coating on the road surface, passing vehicles can be detected more reliably, so that the number of vehicles passing at high speed can be more reliably counted.

Since the optical sensor unit and the repeater can be installed in each parking lot as a group, the installation work is easy and the expandability is excellent.

Therefore, it is possible to accurately count the number of vehicles passing at high speed, to provide a highly reliable vehicle number management apparatus which is easy to install and has excellent expandability.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a vehicle number management device according to the present invention.

FIG. 2 is an overall block configuration diagram showing an example of a vehicle number management device according to the present invention.

FIG. 3 is a block configuration diagram of an optical sensor unit according to the present invention.

FIG. 4 is a signal waveform of each part of the optical sensor unit

FIG. 5 is a block diagram of a repeater according to the present invention.

FIG. 6 is a block diagram of a main part of an in-vehicle information processing device according to the present invention.

FIG. 7 is an explanatory view showing an example of the arrangement of optical sensor units of the vehicle number management device according to the present invention.

FIG. 8 is a display example of an in-vehicle information processing device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Optical sensor unit, 2 ... Repeater, 3 ... Communication controller 4 ... Display board, 5 ... Full vehicle indicator light, 6 ... In-vehicle information processing apparatus, 6A ... Operation part (keyboard), 10 ... Raceway, 11, 12 ... Photocoupler, 13 ... Sequential feed pulse generating means, 14 ... Sensor unit number generating means, 15 ...
Light emitting part, 16 ... Light receiving part, 17 ... Low pass filter, 18
... incorporation means, 19 ... sensor information encoding means, 20 ...
3-state buffer, 21 ... Sync pulse generation circuit, 22
... Sequential feed pulse generation circuit, 23 ... Relay buffer, 2
4, 25 ... Photo coupler, 30 ... Vehicle, 31 ... Vehicle passage determining section, 32 ... Sequence section, 33 ... Counter section, 34
... Display drive unit, 35 ... Display device, 40 ... Optical sensor unit group, a (1) ... Forward pulse, a (i-1), a
(I) ... Progressive feed pulse, b (i-1), b (i) ... Sync pulse, c (i), d (i) ... Sensor information signal, e
(I), f (i) ... Sensor information, i ... Sensor unit number signal.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location G07C 9/00 G08G 1/04 A G08G 1/04 1/065 A 1/065 H01H 35/00 A H01H 35/00 G01S 17/88 B

Claims (3)

[Claims] 1. An optical sensor unit comprising a light emitting portion and a light receiving portion is arranged from above the entrance of the parking lot toward the road surface, and a plurality of the optical sensor units are arranged in the passage width direction at intervals shorter than the vehicle width. By arranging individually, a plurality of them are arranged at intervals shorter than the vehicle length in the passage length direction, and based on the sensor information from the plurality of optical sensor units, by counting the number of vehicles entering and leaving , A vehicle number management device characterized by managing the number of parked vehicles. 2. A sensor information from the optical sensor unit when an object reflection type optical sensor unit is used as the optical sensor unit to focus on a road surface and the reflected light from the road surface is received. The number of vehicles entering and leaving the vehicle is counted based on the result of comparison between the sensor information from the optical sensor unit and the reference sensor information when the reflected light from the vehicle is received. The vehicle number management device according to claim 1. 3. The vehicle number management device according to claim 1, wherein the road surface is formed of a substance having a high light reflectance.