JP2017198053A - Photoelectronic sensor system automatically scanning and detecting protrusion of an object from restricted range - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for detection of lateral protrusion from stop position, protrusion of a part of a car, and height over of a car upon parking at a mechanical parking lot etc.SOLUTION: Two right and left lines of reflection tape for a reflection type photoelectronic sensor are arranged at front of a pallet, with a same interval as width of the pallet, at full length corresponding to height of a vertically moving type gate door of a parking apparatus. A reflection type photoelectronic sensor is arranged on respective of both right and left sides at lower edge on backside of the gate door. Interval between two photoelectronic sensors is adjusted in a manner where width between emission optical axes for each of photoelectronic sensor corresponds to center line of a width of the reflection tape. After completion of parking, until the gate door falls down to be in full closed state, optical axes of two right and left photoelectronic sensors fall down in parallel in a linked manner with movement of the door. It is detected whether a parking car has a protruding part from both sides of the pallet by reflection and reception from the reflection tape. In a case where protrusion is detected, closing action of the gate door is stopped, the gate door is opened, and it is guided by sound or displayed that protrusion is generated.SELECTED DRAWING: Figure 1

Description

  Detecting protrusions from stored objects such as mechanical parking devices or automated warehouses

The present invention detects the protrusion of a target object from the specified range (left and right sides or upper part) by using a scanning photoelectric sensor that automatically moves, receiving light such as a reflective tape fixed to the light receiving unit, and the reflecting unit. System.

In the case of a mechanical parking lot, the detection of whether the parked vehicle is in the correct position, for example, the detection of whether the left and right sides of the vehicle are outside the specified range The light-emitting part and the light-receiving part of the one-beam or multi-beam photoelectric sensor are fixed and used.
This type of photoelectric sensor is composed of a light-emitting part and a light-receiving part, and the light-emitting part and the light-receiving part are installed fixedly apart from each other. It is a device that detects an obstacle. (See 1 in Fig. 3)

However, because there are limited places on the entrance floor of a mechanical parking lot where the arc tube and photoreceiver can be installed, and the vehicle length and the shape of the door mirror vary, the actual stop on the pallet The position is slightly different from the front, back, left, and right of the expected position, and the assumption that the optical axis that passes through the specified range can be detected within the detectable range may be off.
Depending on the various stop positions, the door mirror part or the like is not necessarily placed in the region of the optical axis that can be detected by the phototube installed in a fixed manner. For example, the minicar may be behind the pallet, or the stop position may be on the right, left, front, or the like, and a problem that the protrusion of the door mirror cannot be detected occurs. (See 2 in Figure 3)

In general, in order to prevent this problem, it is recommended that each user (driver) stop at the center (predicted position) of the pallet when using a mechanical parking lot.
Whether the optical axis that transmits within the specified range as much as possible stops the car at the detectable stop position that can be detected, or increases the number of phototube beams to maximize the area of the detectable optical axis There is no other way to deal with.
Due to the site, these methods cannot solve the problem completely.

As an improvement measure, a tape reflection photoelectric sensor (integrated light emitting and receiving type) is provided at the lower edge of the back side of the door using the vertical movement when the parking lot entrance door opens and closes. Using reflective tape that is fixedly laid on both sides of the mirror reflected in front of the pallet in the front of the pallet, and using the descent operation that fully closes the door from fully open after the vehicle has been stored, the optical axis of the photoelectric sensor is linked to While the shaft descends in parallel from the top to the bottom of the door, the photoelectric sensor repeats light emission, light reception, and reflection with the reflective tape on the opposite side, scanning the left and right sides of the pallet for protruding light shielding objects, All light shielding objects can be detected regardless of the stop position. (See Figure 4)

The problem to be solved is that the protrusion of the stored item from the mounting pallet cannot be detected easily and quickly in a short time and without leakage.

A method of detecting a light-shielding body that protrudes from a specified range from a photoelectric system comprising a combination of a light-emitting / light-receiving integrated sensor as a movable part and a light-receiving and reflecting tape as a fixed part.

There is no leakage, and 100% reliable detection of the protrusion from the object (regardless of the stopping position on the pallet) mounted on the containment, and the simplest and cheapest part (1 of the cost of the conventional fixed multi-optical axis method) It has the advantage that it can be done with

(3) It is explanatory drawing which showed the implementation method which detects the protrusion from the regulation range of the both sides of a vehicle using the downward movement of a vertically movable door. Example 1

(3) It is explanatory drawing which showed the implementation method which detects an overheight using the horizontal movement of a horizontal opening door. (Example 2)

BEST MODE FOR CARRYING OUT THE INVENTION

The moving speed of the moving object (example: electric) so that the photoelectric sensor (light emitting and receiving integrated type) linked to the object that moves repeatedly along a fixed path (example: electric door) can emit and receive light stably. The door opening / closing speed is related to the minimum volume of the object to be detected (light-blocking object).

(1) A photoelectric sensor dedicated to light reception can be used in place of the reflective tape, but a large number of photoelectric sensors for light reception are required for detection without unevenness. For one light-emission photoelectric sensor linked to a moving object, a number of light-reception dedicated sensors that can cover the width of the specified range to be detected are required. When (1) a reflective tape is used, a higher-quality detection effect can be obtained by using a sensor of two or more beams instead of the one-beam emitting / receiving photoelectric sensor of (2).

FIG. 1 is a plan view or a front view of one embodiment of the apparatus of the present invention, which is the same as another embodiment of FIG.

The embodiment of FIG. 2 uses (3) the opening / closing operation of a side-opening door, and (2) the tape reflective photoelectric sensor is fixed to the upper part of the back surface of the door, and the optical axis is adjusted to the plane of the floor in conjunction with the opening / closing of the door. It is possible to detect an over-height of the vehicle by receiving and reflecting the reflection tape {circle around (1)} laid at the specified position shown in FIG.

Since the subject of the present invention is the mounting method of the reflective tape and the photoelectric sensor, description of the electronic, mechanical system and mechanical parking lot usage will be omitted.

By adopting such a photoelectric sensor that automatically moves, and a reflective tape that is fixed to the specified detection range on one side, all protruding objects can be detected quickly and effectively. From the viewpoint of the manufacturer, it becomes possible to use a device that is easier to use, and from the viewpoint of the manufacturer, a product with better performance can be provided at a lower cost.

In various automatic warehouses, mechanical parking devices, etc., before storing the storage object, a method for easily detecting whether the stored object protrudes from the specified range of the mounted pallet, or the specified range of other various target objects It can also be applied as a means for detecting protrusion from the outside.

(1) Reflective tape or mirror (for light reception and reflection light emission)
(2) Reflective photoelectric sensor (integrated sensor combined with light emission and light reception functions)
▲ 3 ▼ Vertical or side opening doorway (Mounting base for interlocking photoelectric sensor)
(4) Car-mounted pallet (object to be detected)
▲ 5 ▼ Stop mirror for warehousing (for explanation of the example)

  (3) It is explanatory drawing which showed the implementation method which detects an overheight using the horizontal movement of a horizontal opening door. (Example 2)   It is outline explanatory drawing which showed one example of the conventional method which detects the protrusion of a warehousing vehicle in the entrance of the vehicle of a mechanical parking apparatus. The photoelectric sensor for light emitting and receiving is fixed on the wall and the area that can be detected is limited, and depending on the stop position of the car and the state of the car (door mirror tatami etc.), it is stored without being able to detect part of the car body. Can be assumed.   The light emitting and receiving integrated photoelectric sensor that is fixed to the lower back of the door in the car parking room of the mechanical parking device automatically moves in parallel from top to bottom in conjunction with the upper and lower doors that are closed. It is a schematic explanatory drawing of the process in which the light-emitting and light-receiving optical axis lines detect the vehicle side protrusion without omission.

Claims (1)

It consists of a light emitting and receiving unit that moves automatically, a fixed light receiving and reflecting unit, and a reflective photoelectric sensor (emitting and receiving light) on an object that repeatedly moves (eg, a door that opens and closes) along a specified movement trajectory. Each time the object moves, the optical axis of the photoelectric sensor that is linked together detects the light blocking object, so that the reflective tape (light receiving and reflecting portion) fixed to the opposite side of the photoelectric sensor is detected. By repeating light emission, reflection, and light reception in the meantime, within the area consisting of the height of the reflective tape and the length of the reflection optical axis, the light shield is scanned, and the light shield that interferes with light reception and reflection is automatically detected. Photoelectric sensor system.