JPH0213655Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention particularly relates to the improvement of a vehicle and person identification device in a parking facility using a photoelectric device installed at the vehicle loading/unloading entrance of a mechanical parking facility. It is.

[Conventional technology]

Conventionally, as shown in Figure 2, floodlight devices PH1-A, PH2-A, PH3 have been installed in mechanical parking facilities.
-A, PH4-A and light receiving device PH1-B, PH2
-B, PH3-B, and PH4-B are placed at appropriate locations at the car loading/unloading entrance to detect the presence/absence of people and cars, the direction of movement, and the length of cars.
It determines whether the parking device can be operated. (PH1 is a photoelectric device consisting of a light projecting device PH1-A and a light receiving device PH1-B, PH2 is a photoelectric device consisting of a light projecting device PH2-A and a light receiving device PH2-B, and PH2 is a photoelectric device consisting of a light projecting device PH2-A and a light receiving device PH2-B. (The photoelectric device consisting of the light emitting device PH3-B is referred to as PH3, and the photoelectric device consisting of the light projecting device PH4-A and the light receiving device PH4-B is referred to as PH4.) In other words, the photoelectric device PH3 detects the presence/absence of a vehicle and uses the photoelectric Devices PH2 and PH4 detect the length of the car or the protrusion of the stopping position, and use photoelectric devices.
Distinguishing people and cars using PH1 and PH2 (photoelectric device)
If both PH1 and PH2 light beams are blocked, it is determined that it is a car) and the direction of movement of people and cars.

[Problem that the invention attempts to solve]

By the way, due to space constraints, photoelectric devices PH1 and PH2 are often placed close to each other, and the distance is about the same as a normal human stride.
Conventional devices, which determine that it is a car if both PH1 and PH2 light beams are blocked at the same time, have the drawback of misidentifying it as a car even in the case shown in FIG. 3.

Also, as in Japanese Utility Model Publication No. 51-12850, two floor switches are installed side by side on the floor of the entrance/exit of the parking device,
If both of these floor switches operate at the same time, the car
If only one person operates, it can be configured to identify it as a person, but if two people happen to enter the parking device side by side, it may be mistakenly recognized as a car entering the parking device. There are drawbacks to this.

In general, in the case of mechanical parking systems, it is recognized that when a car enters the tower, the driver always comes out of the tower, or when a person enters the tower, the car usually leaves the tower. Identification of vehicles is an extremely important issue in driving management, and incorrect identification may cause an accident resulting in injury or death.

In addition, the direction of movement of a person or vehicle can be detected using a photoelectric device PH.
1. With conventional equipment that discriminates based on the order of shutting off PH2,
If both photoelectric devices PH1 and PH2 move backward from the shielded state, the direction of movement will be misjudged, and there is also a risk of an accident occurring.

The present invention was devised in view of the above points, and an object of the present invention is to provide a more reliable discrimination device.

[Means for solving problems]

The present invention provides a first photoelectric device including a first light projecting device and a first light receiving device, and a second photoelectric device including a second light projecting device and a second light receiving device near the entrance of the mechanical parking device. The photoelectric devices are arranged adjacently, and the first light receiving device and the second light receiving device are in the first output state and the second light receiving device when receiving the light beams emitted from the first light projecting device and the second light projecting device, respectively. output state, and if the ray is blocked by an object, the third
and a fourth output state, a first discrimination device that determines that the object is a car if the third output state and the fourth output state are maintained for a predetermined time or longer; a first detection device that uses the first output state and the third output state as inputs, detects switching from the third output state to the first output state, and outputs the first detection state; 2
and the fourth output state as inputs.
a second detection device that detects the switching from the output state to the second output state and outputs the second detection state; The present invention is characterized in that it includes a second discrimination device that discriminates the moving direction of the object based on the order of occurrence of the first detection state and the second detection state.

[Effect]

With the configuration as described above, it is possible to clearly distinguish between a person and a car and the direction of movement of the person and the car based on the operating conditions of the two sets of photoelectric devices.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

In Figure 1, E+ and E- are power busbars, PH
In 1a, the light beam from the light emitter PH1-A is transmitted to the light receiver PH.
PH2a is a contact that closes if light is received by light transmitter PH2-B and opens if it is interrupted by a person or a car. Contacts that open when interrupted by a car, PY1 to RY9 are relays that energize when voltage is applied, and RY1a is a relay
RY1 normally open contact, RY1b, RY1c are relays
RY1 normally closed contact, RY2a is relay RY2 normally open contact, RY2b, RY2c are relay RY2 normally closed contact, RY3a is relay RY3 normally open contact, RY4a
is the normally open contact of relay RY4, RY5a is relay RY
5 normally open contact, RY6a is the normally open contact of relay RY6, RY7a is the normally open contact of relay RY7, TRY1
is the activation delay relay, TRY1a is its time-limited normally open contact, TRY2 to TRY4 are the recovery delay relays,
TRY2a to TRY4a are recovery delay relays, respectively.
Time-limited return normally open contacts of TRY2 to TRY4, R1, R
2 is a resistor, C1 and C2 are capacitors, and the resistor R1 and capacitor C1 and the resistor R2 and capacitor C2 provide the relays RY4 and RY5 with a certain time-limited return operation function.

In such a circuit, first, it is determined whether it is a person or a vehicle based on whether the light beams of the photoelectric devices PH1 and PH2 are simultaneously blocked for a predetermined time or longer. In other words, it is equipped with a circuit that determines that it is a car if both lights are blocked simultaneously for a predetermined period of time.

That is, if the light beam of the photoelectric device PH1 is blocked, the relay RY1 is deenergized due to the opening of the contact PH1a.
If the light beam of photoelectric device PH2 is blocked, contact PH
2a is opened, relay RY2 is deenergized, and when something nearly 2m long, such as a car, enters or exits the parking lot, the light beams of both photoelectric devices PH1 and PH2 are always blocked at the same time for a predetermined period of time or more, resulting in a closed circuit "E+". −
RY1b-RY2b-TRY1-E ^- " activates the operation delay relay TRY1, and the time-limited operation contact TRY1
The relay RY3 is energized by the closing of a, and the closed circuit "E+-RY3a-TRY2a-RY3- ^E- " is self-maintained to detect that a car is entering or exiting. On the other hand, when a person enters or exits, for example, even if the situation shown in FIG. 3 occurs, it is instantaneous, so the contact TRY1a of the activation delay relay TRY1 does not close, and the relay RY3 is not energized.
Here, the recovery delay relay TRY2 is a relay that is deenergized when the voltage is removed and the time required for a vehicle to enter or exit normally has elapsed, so each time a vehicle enters or exits, the contact
The self-holding of relay RY3 is released by opening TRY2a.

Next, the direction of movement of a vehicle or person is detected by detecting the order in which the photoelectric devices PH1 and PH2, which have been once shielded from light, are allowed to pass light again. In other words,
Whether it is a car or a person, by detecting the order in which light is passed through once the light is blocked, the direction of movement can be determined more accurately.

In other words, whether it is a car or a person, if the light beam from the photoelectric device PH1 is blocked, a closed circuit "E+ -RY1c-RY4-E ^- " is created.
relay RY4 is energized and photoelectric device PH2 is activated.
If you block the rays of light, a closed circuit "E+ -RY2c-RY
When the photoelectric device PH1 receives a light beam after the person or vehicle moves, the relay RY5 is energized by ``5-E- <sup>'</sup> ', and the closed circuit ``E+-RY1a-'' is activated only while the delay operation by the resistor R1 and capacitor C1 is active.
RY4a-RY6-E ^- '' relay RY6 is energized, and when photoelectric device PH2 receives the light beam, resistor R is activated.
2 and capacitor C2, the circuit is closed only while the delay operation is active.
7-E- ^' ', relay RY7 is energized.

Once voltage is applied to relays RY6 and RY7 and relays RY6 and RY7 are energized, contacts TRY3a and TRY4a of recovery delay relays TRY3 and TRY4 are closed for the time normally required for a person or vehicle to enter or exit. Therefore, for example, if the photoelectric device PH1 → PH2 changes from light blocking to light passing in the order, a closed circuit "E+ -TRY3a-RY7a-
RY8-E ^- '' relay RY8 was energized and a person or vehicle (if relay RY3 was energized, it was a car; if it was not energized, it was a person) entered the tower, and the photoelectric device If it changes from blocking light to passing light in the order of PH2 → PH1, a closed circuit “E+ −TRY4a−
RY6a-RY9-E ^- '', it was determined that relay RY9 was energized and a person or car (if relay RY3 was energized, it was a car; if it was not energized, it was a person) had gone out of the tower. can.

In the above explanation, each detection device and discrimination device has been explained using an example of a device having an output contact to operate a relay sequence, but like a digital circuit, a high level output signal or a low level output signal is used. It is not limited to the embodiments, and may be any device that generates the information.

[Effect of idea]

As described above, according to the present invention, it is determined whether a person or a vehicle is a vehicle if the light beams of two or more photoelectric devices installed at the entrance/exit of a parking device are simultaneously blocked for a predetermined period of time or more. The direction of movement of people and cars is determined by detecting the order in which the photoelectric device changes from blocking light to passing light, which not only reduces the possibility of misidentifying people and cars, but also helps determine the final movement of people and cars. The direction can be grasped accurately.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of an implementation of the present invention, FIG. 2 is a plan view of a mechanical parking device, and FIG. 3 is an explanatory diagram of a prior art. PH1-A, PH2-A, PH3-A, PH4-
A... Light projector, PH1-B, PH2-B, PH3
-B, PH4-B... Light receiving device, PH1 to PH4...
...Photoelectric device, RY1 to RY9...Relay, TRY1
...Activation delay relay, TRY2 to TRY4...Recovery delay relay.

Claims (1)

[Claims for Utility Model Registration] (1) Near the entrance of the mechanical parking device, there is a first photoelectric device consisting of a first light projecting device and a first light receiving device, a second light projecting device and a second light receiving device. A second photoelectric device including a light receiving device is arranged adjacently, and the first light receiving device and the second light receiving device receive the light beams emitted by the first light projecting device and the second light projecting device, respectively. If light is received, the first output state and the second
and outputs a third output state and a fourth output state, respectively, when the light beam is blocked by an object, wherein the third output state and the fourth output state are predetermined. a first discriminating device that determines that the object is a car if the input is maintained for a period of time or more; a first detection device that detects the switching to the output state and outputs the first detection state; and a first detection device that detects the switching to the output state and outputs the first detection state; a second detection device that detects the switching to a second output state and outputs a second detection state;
A discriminating device for a mechanical parking device, comprising a second discriminating device that discriminates the moving direction of the object based on the detection state and the order of occurrence of the second detection state. (2) The discriminating device for a mechanical parking device according to claim 1, wherein the object is a person or a car. (3) A discriminating device for a mechanical parking device according to claim 1, wherein the light beam of the first light projecting device and the light beam of the second light projecting device are parallel. (4) The first output state and the second output state are states in which the output contact is closed, and the third output state and the fourth output state are states in which the output contact is opened. A discriminating device for a mechanical parking device according to claim 1 of the utility model registration claim. (5) The first detection device and the second detection device have a built-in storage device that maintains the first detection state and the second detection state for about the time required for entering and exiting the vehicle. A discriminating device for a mechanical parking device according to claim 1 of the utility model registration claim.