KR101691844B1 - A vehicle collision avoidance control system and method for an overhead door - Google Patents

Abstract

The present invention relates to a control system to prevent an overhead door from colliding with a vehicle configured to, in a case where the overhead door installed in a garage comes a little down from a top thereof, prevent a generation of an accident in which a top of the vehicle collides with the door while a driver enters into the garage due to no acquisition of the drivers view caused by a blind spot of the rear-view mirrors on which the driver performing rear-parking looks.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a vehicle collision avoidance control system and an overhead door,

The present invention relates to a control system and a control method for preventing a vehicle from colliding with an overhead door. More specifically, when a part of the overhead door is opened, when the vehicle approaches, it is detected and converted into a fully opened state. When the door of the lift door is completely closed, The present invention relates to a control system and a control method for preventing a door from being automatically opened.

The overhead door is a door that is opened and closed by power, and is defined as a concept including 'shutter', 'speed door', 'stacking door' and the like in the present invention.

Generally, the overhead door is installed in a fire department garage, an industrial factory factory, or a vehicle exit of a warehouse. When the door is opened, the door is vertically raised and stored in the upper part of the doorway.

However, an overhead door installed in a garage or a factory where a work vehicle such as a fire truck, a forklift or a lorry enters and leaves the inside often collides with the entrance and exit of the vehicle.

Especially vehicles such as fire engines are parked in the garage for quick mobilization. However, when the door of the garage entrance is opened in a state where the door of the garage entrance is slightly lowered (within approximately 1 m), since the door down to the side mirror seen by the driver when the fire truck is parked behind does not shine well, Accidents occur frequently.

In order to prevent such accidents, it is necessary for the auxiliary personnel to guide the entry and exit of the vehicle after confirmation by the naked eye in important facilities such as the fire department, but it is necessary to automatically control the elevation of the door because the manpower requirement is large and it is not economical.

Conventional automatic door operation automatic control techniques include the following.

First, in Korean Patent Laid-Open No. 2010-0046868, when a safety sensor detects an object approaching an automatic door detection area, the automatic door is opened, and when the object passes the automatic door, the automatic door is closed A technique for controlling the temperature is proposed.

Korean Patent No. 10-1163833 discloses a control system for recognizing whether a lower obstacle is detected during a door lowering operation by an encoder pulse generated by a motor operation so as to perform an inversion operation (i.e., a door elevation) Is proposed.

Japanese Laid-Open Patent Application No. 2003-0086665 discloses a technique for controlling the door to be stopped once after the intervention of the obstacle is detected by the sensor on the descending path when the door is descended.

Japanese Patent Application Laid-Open No. 2005-0072067 discloses a method for determining the presence of a foreign object when the rotational speed of the motor is lowered to a reference value or less by inserting a foreign object during the closing operation of the vehicle window glass, Open control is disclosed.

Korean Patent Publication No. 2010-0046868 (published on May 28, 2010). Korean Registered Patent No. 10-1163833 (Registered on July 2, 2012) Korean Patent Publication No. 2003-0086665 (published on November 12, 2003). Korean Patent Publication No. 2005-0072067 (Published on Jul.

The technology disclosed in Korean Patent Publication No. 2010-0046868 of the related art is to control the door to be opened unconditionally when an object approaches and is detected by a sensor. Therefore, this conventional technique can not be utilized in a fire department garage or a doorway of a factory which should not be open when a vehicle or an unrelated person passes by. Further, there is no clue as to the technique of preventing the collision between the lower portion of the door and the entrance / exit vehicle by fully opening the door unconditionally when the vehicle approaches when the door is partially opened.

The technique disclosed in Korean Patent No. 10-1163833 and Korean Patent Laid-Open Nos. 2003-0086665 and 2005-0072067 is to detect the obstacle when the obstacle is on the door opening / closing path and to control the opening of the door. Therefore, these techniques can not be applied to the control of the door by detecting a vehicle or a person at a certain distance from the front or rear of the doorway rather than the opening / closing path of the door. Even if applied forcefully, it is difficult to apply it to the entrance of the garage of the fire department or the factory which needs security because the door will be open unconditionally in response to the case where the vehicle or the person concerned does not pass. These prior arts have no reference to the door operation control when the vehicle approaches when the door is partially open.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a door opening / closing device for a vehicle, which is capable of maintaining security when the overhead door is fully closed, So as to prevent collision between a lower portion of the door and an entrance / exit vehicle, and a control method therefor.

In order to solve the above problems, in the present invention, a control method of a vehicle collision avoidance control system of an overhead door exemplifies the case of PLC control and relay control.

In the PLC control, the control unit determines whether or not the door is partially opened (S10). If the door is determined to be partially open in step S10, the controller activates a vehicle sensor signal receiving line; S30, in which the control unit receives the vehicle detection signal from the vehicle sensor; S50 of the controller driving the driving unit in the opening direction of the door; Step S60 of the controller receiving a door open signal from the door position sensor; Step S70 of the control unit terminating the operation of the driving unit; Step S80 in which the control unit deactivates the vehicle sensor signal receiving line; And a step S90 in which the control unit activates the operation unit signal reception line.

If it is determined in step S10 that the door is fully opened or completely closed, the control unit proceeds directly to step S80 for deactivating the vehicle sensor signal receiving line.

If it is determined in step S40 that the control unit has generated an operation signal from the operation unit, and if it is determined in step S40 that an operation signal has been generated from the operation unit, the control unit performs step S45 If it is determined in step S40 that no operation signal is generated from the operation unit, the control unit proceeds directly to step S50 in which the drive unit is driven in the opening direction of the door.

An example of the relay control is an RS10 step in which the vehicle sensor detects the vehicle when the vehicle approaches the entrance while the door of the overhead door is being stopped while the door is being lowered or partially opened. An RS20 step in which the relay coil R is excited to operate the door rising preparation circuit portion H; A step RS30 in which the relay coil U is excited to operate the door elevator circuit E; Step RS40 in which the elevation of the door is stopped by the action of the upper sensor; And an RS50 step in which the door lift preparation circuit part H enters a standby state in which it can respond to the detection signal of the vehicle sensor.

And an RS20-1 step in which the timer circuit part I operates between the RS20 step and the RS30 step, and may further include an RS20-2 step of blocking the operation of the door falling circuit part G when the vehicle is sensed have.

In addition, it may further include an RS30-1 step of interrupting the operation of the door lowering circuit part G when the door is raised between the RS30 step and the RS40 step.

In the case of the relay control, when the vehicle approaches the entrance while the door of the overhead door is fully lowered, the b contact limit switch D-ST of the lower sensor is detached, Gt; RS60 < / RTI > An RS70 step of disconnecting the operation of the door rising preparation circuit part H by the relay coil R being opened; And an RS80 step in which the door ascending circuit section E waits in an operation section mode in which the operator must operate the operation section to raise the door.

In the meantime, the present invention exemplifies the case where PLC control and relay control are performed for the vehicle collision avoidance control system of the overhead door performing the control method.

An example of the PLC control is a door position sensor for detecting the position of the door and transmitting the information to the control unit; A vehicle sensor that senses a vehicle approaching the door and transmits information to the control unit; An operation unit for transmitting a signal of ascending, descending, or stopping the door to the control unit; The controller receives the information transmitted from the door position detector, the vehicle detector, and the operation unit to control whether the vehicle sensor signal receiving line is activated, whether the operation unit signal receiving line is activated, whether the driving unit for raising, lowering or stopping the door is driven And a control unit.

An example of the case of relay control includes a door position sensor for sensing the position of the door and transmitting the information to the control unit; A vehicle sensor that senses a vehicle approaching the door and transmits information to the control unit; An operation unit for transmitting a signal of ascending, descending, or stopping the door to the control unit; The door elevator circuit portion F, the door descent circuit portion G and the door elevator preparation circuit portion H are selectively operated to receive the information of the door position sensor, the vehicle sensor, and the operation portion, thereby to raise, lower or stop the door And a control unit for controlling whether the driving unit is driven or not.

The door position sensor may include an upper sensor for detecting whether the door is fully opened and a lower sensor for detecting whether the door is completely closed. If necessary, the door position sensor may be an encoder connected to the driving unit You may.

In the overtop door control system and control method of the overhead door according to the present invention, when the overhead door is in the fully closed state, the door is not opened even when the vehicle approaches, It can be installed at the exit of the industrial site where there is no need to open the fire door garage or the unnecessary door because security is needed.

The overturn prevention control system and the control method of the overhead door according to the present invention automatically open and open the door when the vehicle approaches when the overhead door is partially open, And it is not necessary to use a separate auxiliary manpower for driving the vehicle.

1 is a block diagram of a control system according to the present invention;
2 is a flowchart of a control method according to the first embodiment of the present invention implemented by PLC control
3 is a circuit diagram for Embodiment 2 of the present invention implemented with relay control
Fig. 4 is a circuit diagram of an embodiment in which a timer is added to the embodiment 2 of Fig. 3
5 and 6 are flow charts of the control method according to the second embodiment of the present invention implemented with relay control

The terms used for describing the present invention are terms defined in consideration of the functions of the present invention. However, since these terms can be expressed in other terms depending on the intention or custom of the designer or the user, the definition of these terms used in the present invention should be made in consideration of the contents described throughout the specification.

In the description of the present invention, when it is stated that a part is "connected" to another part, it should be understood that it includes not only a "direct connection" but also a "connection" made by an indirect method do.

Throughout the specification of the present invention, when a part is referred to as "including " an element, it is understood that it may include other elements as well, without excluding other elements unless specifically stated otherwise.

In the following description, well-known functions or constructions well known to those skilled in the art will be described in detail with reference to the accompanying drawings.

Hereinafter, preferred embodiments according to the present invention will be described.

1 is a block diagram of a system for preventing collision prevention of an overhead door according to the present invention.

Referring to FIG. 1, a control system according to the present invention includes a control unit 10, a door position sensor 20, a vehicle sensor 30, an operation unit 40, and a driving unit 50.

The overhead door of the present invention has the highest position of the door lower end portion where the door is completely opened and the lowest position of the door lower end portion where the door is completely closed.

That is, the highest position is the point where the door of the overhead door rises along the guide rail installed at the right and left of the doorway, the doorway is fully opened, and the door bottom is located when the door is stopped from rising. The lowest position is a position where the door bottom is located when the door is lowered and the door is completely closed and the door is stopped to descend.

The door position sensor 20 of the present invention senses the position of the lower end of the door installed to raise and lower for opening and closing the overhead door, and transmits sensed position information to the control unit.

To this end, the door position sensor 20 is connected to a driven shaft that rotates in conjunction with a drive motor, as disclosed in the applicant's No. 10-1468904, and the movable contact, which moves in the axial direction of the driven shaft, A limit switch (micro switch) installed at a slave axis position corresponding to the maximum door-opening point at which the door is fully opened is used as the upper sensor 21, And a limit switch (micro switch) installed at the position of the lower limit sensor 22 is used.

Further, the door bottom guide of the present invention can be used as the upper sensor 21 by providing a photoelectric switch or a limit switch to a door guide rail at a position where the door bottom reaches the highest position and the door is fully opened. It is also possible to provide a photoelectric switch or a limit switch to a door guide rail at a point where it is closed and use it as a lower stage sensor 22.

 The door position sensor 20, that is, the upper sensor 21 and the lower sensor 22 may be a variety of known means capable of detecting that the door is fully opened or fully closed, in addition to the limit switch or photoelectric switch described above, For example, a reed switch. Since the installation of these switches is obvious to those skilled in the art, a detailed description thereof will be omitted.

An encoder 25 connected to the driving unit 50 may be used as the door position sensor 20 in place of the sensor type upper sensor 21 and the lower sensor 22 described above.

That is, if the pulse value generated in accordance with the rotation of the encoder shaft connected to the driving unit (for example, the electric motor) is used, the number of rotations and the direction of rotation of the motor can be known. Therefore, . In other words, the control unit 10 can control the driving of the door by using the door position determined by the pulse value of the encoder 25.

The technology for detecting the moving distance and the direction of the object connected to the motor using the encoder is a general technology widely used in the industry at present, and therefore, a detailed description thereof will be omitted in the present invention.

The vehicle sensor 30 detects the entry of the vehicle ahead of the entrance of the overhead door and transmits the detection information to the control unit 10. [

In the present invention described below, the vehicle sensor 30 to be used may be constructed using a known motion detection sensor, a loop sensor, a piezo sensor, or the like.

The term " front entrance " as used herein refers to a space through which a vehicle must pass before passing through a doorway. Here, the front of the entrance may mean only the direction toward the outdoors with respect to the entrance, but in some cases, it may refer to both the inside and the outside of the entrance based on the entrance.

The configuration and installation method of the sensors that can be used as the vehicle sensor 30 are obvious to those of ordinary skill in the art and will not be described in detail.

The operation unit 40 is provided with buttons for the operation of raising, lowering and stopping the door. In the embodiment of the present invention, the button of the operation unit 40 is constituted by a push-button switch.

When the button is selected and pressed, the control unit 10 gives the motor a driving signal for raising, lowering or stopping the door.

The operation unit 40 may be constituted by a normal hoist switch or a remote control switch. If necessary, the operation unit 40 may be provided so that the button is directly projected from the control box in which the control unit 10 is built.

The driving unit 50 opens or closes the door by raising or lowering the door. Here, the driving unit 50 may be a motor, and is generally connected to a rotary shaft installed at an upper portion of the overhead door.

For reference, a conventional overhead door has a structure in which, when a rotary shaft is rotated by a motor, the door connected to the rotary shaft by a chain or a wire is lifted or lowered.

The controller 10 controls the overall operation of the overhead door according to the present invention, and can perform relay control or PLC (programmable logic controller) control.

The control unit 10 receives signals generated from the door position sensor 20, the vehicle sensor 30 and the operation unit 40 and controls the driving unit 50 to elevate, lower or stop the door.

1, the control unit 10 in the case of PLC control includes a CPU module including a microprocessor for processing signals and a memory in which information such as a control program is stored, an input module for receiving signals from an external sensor or switch, And an output module for transmitting the result of the arithmetic processing of the relay device to an external device. In the case of relay control, the control unit 10 is configured by connecting various relays such as a relay and a timer.

Hereinafter, a control method of the overhead door of the present invention using the vehicle collision avoidance control system will be described in detail with reference to FIG. 2 attached hereto.

<Example 1>

Example 1 is a control method in the case of PLC control.

First, the control unit 10 determines whether or not the door of the overhead door is partially open (step S10).

The judgment method is as follows.

When the door position sensor 20 is constituted by the upper sensor 21 and the lower sensor 22, the controller 10 receives the signal generated when the lower end of the door is sensed by the upper sensor 21, And when it receives a signal generated when the lower end of the door is sensed by the lower sensor 22, it is judged that the door is completely closed.

When the door 10 is separated from the upper sensor 21 and the lower sensor 22 and the control unit 10 can not receive any signal from the upper sensor 21 and the lower sensor 22, .

When the door position sensor 20 is constituted by the encoder 25, the encoder pulse values when the door lower end is at the highest position or the lowest position are stored as the highest position reference pulse value and the lowest position reference pulse value, respectively.

In this state, the motor is driven to open and close the door, and the encoder 25 transmits the changed pulse value to the control unit 10. The control unit 10 receives the pulse value, It is determined that the door of the overhead door is partially open.

Of course, when the motor is continuously driven at this time, the encoder 25 transmits the continuously changed pulse value to the control unit 10, and thus the pulse value of the encoder 25 received by the control unit 10 is stored in advance as the highest position reference pulse value Or reaches the same value as the lowest position reference pulse value, the controller 10 determines that the door is in a fully opened state or a fully closed state.

If it is determined in step S10 that the door is partially open, the controller 10 activates the vehicle sensor signal receiving line (step S20)

If it is determined in step S10 that the door is completely closed, the control unit 10 deactivates the vehicle sensor signal receiving line (step S80), and then controls the operation unit signal receiving line to be activated continuously (step S90).

The reason for activating the vehicle sensor signal receiving line when the door is partially opened is because the door is slightly lowered from the upper part and the door is hung in the square of the side mirror viewed by the driver of the vehicle in rear parking, So as to grasp the approach of the vehicle to the vehicle detector 30. [

The reason for deactivating the vehicle sensor signal receiving line when the door is in the fully closed state is to prevent the opening of the doorway by sensing the vehicle sensor 30 when an unrelated vehicle or person approaches it to maintain security . Accordingly, in order to pass the vehicle through the doorway when the door is fully closed, the door must be opened by operating the operating portion 40.

If it is determined in step S10 that the door is fully opened, it is not necessary to check whether the vehicle sensor signal receiving line is activated. However, in the door fully opened state, It is preferable to deactivate the vehicle sensor signal receiving line.

If the vehicle sensor 30 detects the approach of the vehicle ahead of the entrance and transmits a signal when the vehicle sensor signal reception line is activated in step S20, the control unit 10 transmits a vehicle detection signal from the vehicle sensor 30 (Step S30).

If the control unit 10 receives the vehicle detection signal from the vehicle sensor 30 in step S30, the control unit 10 drives the driving unit 50 in the direction of opening the door (step S50) .

However, there are two cases when the door is partially opened. The first is a partially opened state in which the door is stationary, and the second is a partially opened state in which the third person operates the operation unit 40 to raise or lower the door.

When the door 10 is in the partially open state, the control unit 10 will immediately give the driving signal to the driving unit 50 in the door opening direction when receiving the vehicle detection signal from the vehicle sensor 30.

When the control unit receives the vehicle detection signal from the vehicle sensor 30 in the partially open state in which the door is descending, the control unit 10 first stops driving the door closing direction (door falling) of the driving unit 50 , The driving signal in the door opening direction will be given to the driving unit 50 continuously.

At this time, if the control unit 10 sends a signal to stop the door closing direction (door down) driving to the motor of the driving unit 50 and immediately gives an inversion driving signal to the up driving, the motor overcomes the existing rotational inertia, This is because the motor is likely to fail due to overload of the motor. Therefore, it is preferable that the timer is programmed to delay the reverse driving for a predetermined time until the driving unit 50 is driven in the reverse direction after the driving unit 50 stops driving.

 When the door is in the partially opened state, the control unit 10 has already received the rising button input signal of the operation unit and has given the driving signal in the door opening direction to the driving unit 50. [ Therefore, even if the control unit 10 gives the driving unit 50 the driving signal in the door opening direction again, the operation direction of the door remains unchanged, so that the signal is meaningless. As a result, if the control unit 10 determines that the door is being raised, it is preferable to program so as not to generate a separate driving signal.

On the other hand, the overhead door according to the first embodiment, when the controller 10 receives the vehicle detection signal from the vehicle sensor 30 regardless of the partial opening state of the door, , It is possible to enter the step S50 in which the driving unit 50 is driven in the opening direction of the door (the door is raised).

That is, when the control unit 10 receives the vehicle detection signal from the vehicle sensor 30 in step S30, the control unit 10 first determines whether an operation signal is being generated from the operation unit 40 (step S40)

If it is determined in step S40 that an operation signal is generated from the operation unit 40, the control unit 10 deactivates the operation unit signal reception line (step S45), cuts off the signal of the operation unit,

If it is determined in step S40 that no operation signal is generated from the operation unit 40, the control unit 10 proceeds to step S50 as it is.

When the door 50 is raised by the driving unit 50 and the lower end of the door reaches the highest position, the door position sensor 20 generates a door open signal and the control unit 10 receives the door open signal Step S60).

Thereafter, the control unit 10 terminates the operation of the driving unit 50 (S70), and deactivates the vehicle sensor signal receiving line (S80).

Then, by continuously activating the operating unit signal receiving line (step S90), the user operates the operating unit 40 to lower the door after the completion of the entry of the vehicle, thereby establishing a state in which the door can be closed.

<Practical Example 2>

Example 2 is a control method in the case of relay control.

3 is a schematic circuit diagram of a second embodiment of the present invention implemented with relay control, and FIG. 4 is a circuit diagram in which a timer is added to the second embodiment of FIG.

Prior to the description of the control method, the main components in the circuit diagrams of Figs. 3 and 4 will be described.

3 and 4, P24 denotes the anode of the DC 24 V power source, and N24 denotes the cathode of the DC 24 V power source.

The up push button 41, the off push button 42 and the down push button 43 on the circuit diagram correspond to a push button provided on the operation unit 40 for raising, stopping and lowering the door.

U is a door lift relay involved in the door elevation, and D is a door descending relay involved in the door descent. And R is a door-up preparatory relay for allowing the door-up relay to raise the door in response to a signal from the vehicle sensor, and R2 is a door-rise-prevention relay for ignoring the detection signal of the vehicle- All. T added to Fig. 4 indicates a timer relay.

In the drawing, circles denoted by U, D, R, R2, and T denote relay coils, and characters of corresponding relays are written next to each contact symbol.

U-ST is the limit switch used as the upper detector, and D-ST is the limit switch used as the lower detector. And PS is the contact point of the vehicle sensor sensor.

The connection between each relay and the device is done in the same way as the circuit diagrams of FIG. 3 and FIG.

3 and 4 are divided into several dotted boxes for the sake of convenience.

The dotted line box E including the door-up relay coil U and the contact b of the relay D is defined as a door-up circuit.

Dotted line box F, which includes the a-contact of the door-rise prevention relay coil R2 and the relay R2, is defined as a door-lift prevention circuit.

The door downward relay coil D, the b contact point of the relay U and the b contact point of the relay R are defined as the door lowering circuit part.

Dash line box H, which includes the door rising preparation relay coil R, the vehicle sensor sensor contact PS, and the contact b of the relay U, is defined as a door lift preparation circuit.

In FIG. 4, the dotted line box I including the timer relay coil T and the a contact of the relay R is defined as a timer circuit section.

Next, with reference to FIG. 3, FIG. 4, and FIG. 5, in the second embodiment of the present invention implemented with relay control, when the vehicle approaches the doorway while the door is being lowered or partially stopped, Will be described.

First, it is assumed that power is applied to the circuit of FIG. 3 or FIG. 4, and the door is stopped while the door is being lowered or partially opened.

At this time, since the off pushbutton 42 is the contact b, a current can flow in the circuit, and the relay coil R2 (140) is excited by flowing current, so that the a contact R2 (141)

However, when the operator depresses the down push button 43 on the circuit diagram and the door is descending, the following procedure is preceded.

When the down push button 43 is pressed, the relay coil D 160 is energized by the current flow, so that the a contact D 161 is held and self-retained. Accordingly, the control unit 10 sends a downward driving signal to the driving unit 50 to lower the door. At this time, since the b contact D (162) falls and the current does not flow to the door up relay coil U150, the controller 10 does not generate the door up driving signal.

When the vehicle approaches the front or rear of the doorway and is detected by the vehicle sensor 30 (RS10 step), the door lift preparation circuit portion H works because the door must be completely raised to prevent collision of the vehicle. step)

The operation of the door rising preparation circuit portion H is as follows.

First, when the vehicle detection signal is input to the control unit 10, the a contact PS (31) is energized to energize the relay coil R (170).

As a result, the relay coil R (170) is energized, and a contact R (171) is attached and held.

Here, when the timer T is added as shown in Fig. 4, the timer circuit portion I can be operated before the door is raised. (Step RS20-1)

That is, the a-contact point R (172) is disposed in front of the timer relay coil T (180), and the a-contact point T (181) The operation of the door-up circuit E can be delayed by delaying the time.

The specific operation of the timer circuit I will be described with reference to FIG.

When the a contact PS (31) is energized, the relay coil R (170) is energized and the b contact R (173) falls and the a contact R (172) sticks.

When the b contact R 173 is disconnected, the falling driving signal sent to the driving unit is interrupted. When the contact a R 172 is connected, power is supplied to the timer relay coil T 180 to start the timer.

However, if the drive motor is reversely driven by the drive motor immediately during the door lowering drive, it is necessary to overcome the rotational inertia of the motor and to change the drive direction rapidly. Therefore, .

4, if the b contact R (173) drops and the inertial rotation of the motor remains when the downward driving signal to the driving unit is interrupted, the rotation of the motor is completely stopped , So that the motor is not overloaded when the motor is rotated in the reverse direction

On the other hand, when the vehicle approaches, the door should be prevented from falling down, so that the operation of the door lowering circuit G is interrupted as follows (step RS20-2)

Since the relay coil R 170 is excited from the upper side, the b contact R 173 drops, and the relay coil D 160 fails to generate a current, so that the controller 10 can not generate the downward driving signal.

At this time, since the relay coil D 160 is disconnected, the b contact 162 of the relay D is connected to the road

The door lifting circuit portion E can operate.

Next, since the door must be completely raised, the door lifting circuit E acts as follows (step RS30)

In FIG. 3, when the relay coil R 170 is excited, a contact R 172 is attached.

When the timer T is added as shown in FIG. 4, when the relay coil R 170 is energized, the timer T is activated with the contact a R 172. After a predetermined time has elapsed, the timer relay coil T 180 is energized And a timer a contact T (181) is attached.

Therefore, in any case, current flows to the relay coil U150 and the self-holding is performed with the a-contact U115 attached thereto.

Accordingly, the control unit 10 sends a rising driving signal to the driving unit 50 to raise the door.

At this time, since the relay coil U 150 is excited, the b contact U 153 is disconnected, and the current flowing to the a contact PS 31 of the door rising preparation circuit portion H is cut off. Accordingly, when the door is being raised, the control unit 10 does not respond to the detection signal of the vehicle sensor 30. [

In addition, since the door downward driving signal is generated during the rising of the door, the door falling circuit G is interrupted when the door is elevated (RS30-1 step).

The process of the RS30-1 step is as follows.

Because the relay coil U 150 is excited when the door is raised, the relay coil R 170 is disconnected due to the b contact U 153 and the contact b R 173 is attached again. Instead, the b contact U 152 is away from the relay coil D 160, so that the current flowing to the relay coil D 160 is cut off and the door downward driving signal is prevented from being generated during the door elevation.

When the door is then raised and the door is fully opened, the upward movement of the door is stopped by the action of the upper sensor 21. (Step RS40)

The b contact limit switch U-ST 210 used as the upper sensor 21 is cut off and the current is cut off when the door reaches a predetermined entrance entrance full opening point, And stops the rising drive.

When the door is fully opened and the b contact limit switch U-ST 210 is released, the relay coil U 150 is disengaged. Therefore, the b contact U53 is attached again, and a current flows to the a contact PS 31 of the door rising preparation circuit portion H, so that it is in a standby state that can respond to the detection signal of the vehicle sensor 30. (RS50)

The reason for this waiting state is that when the door is lowered by pressing the down push button 43 later, the door must be reversely raised by detecting the vehicle entering the doorway.

3 and 4, assuming that the vehicle approaches the doorway while the door is being raised by pushing the up push button 41 on the circuit diagram, that is, when the vehicle approaches the doorway when the door is being raised, The circuit diagram of FIG.

3 and 4, when the up push button 41 is pressed, electric current flows through the relay coil U 150 of the door lifting circuit part E to excite the contact a U 151, The controller 50 sends a rising driving signal to the driving unit 50 to raise the door.

At this time, since the b contact U 152 of the door lowering circuit portion G is dropped, the relay coil D 160 can not be excited, and accordingly, the downward driving signal sent to the driving unit 50 is intrinsically blocked. At the same time, since the b contact U (153) of the door rising preparation circuit portion H is also dropped, the current flowing to the a contact PS (31) is interrupted, so that the control unit 10 does not receive the detection signal of the vehicle sensor 30.

In other words, while the operator pushes up the push button 41 on the circuit diagram to raise the door, the unconditional door synergism is maintained regardless of whether the vehicle is approaching the entrance or not.

Next, with reference to FIG. 3, FIG. 4 and FIG. 6, a description will be given of a control method for the case where the vehicle approaches the entrance when the door is in a fully lowered state in the second embodiment of the present invention implemented with relay control do.

3 and 4, when the door is completely lowered, the door-up prevention circuit F acts. (Step RS60)

The operation of the door lift prevention circuit F is performed as follows.

When the door is completely lowered, the b contact limit switch D-ST 220 of the bottom sensor 21 drops. Accordingly, since the relay coil R2 140 can not conduct current, the a-contact R2 (141) is separated.

As described above, when the door lift preventing circuit F operates. The operation of the door rising preparation circuit portion H is cut off as follows (step RS70)

When the a contact point R2 (141) falls by the step RS60, the relay coil R (170) of the door rising preparation circuit section H is cut off. Therefore, even if the vehicle sensor 30 detects a vehicle approaching the entrance, the a contact PS 31 does not operate.

When the operation of the door lift-up preparation circuit part H is interrupted as described above, in order to open the door at a later time, the operator waits in the operation unit mode for operating the door lift circuit part E by operating the operation part 40. (RS80 step)

The operation mode of the door lift circuit E acts as follows.

In the step RS70, the relay coil R (170) of the door rising preparation circuit portion H is broken, so that the a contact R (172) can not be attached and the current does not flow to the door rising relay coil U of the door rising circuit portion E.

At this time, however, when the operator presses the up push button 41, the door up relay coil U is excited, and the contact a (151) is attached to the door up relay.

As described above, in the second embodiment, when the door is completely closed, the entrance is not opened even if an unrelated vehicle or a person approaches the doorway and is detected by the vehicle sensor 30, so that security can be maintained.

The above-described embodiments of the present invention can be easily modified into various forms by those skilled in the art without departing from the technical idea or essential features of the present invention. It is therefore to be understood that the embodiments are to be considered in all respects only as illustrative and not restrictive.

10:
20: door position sensor 21: upper sensor
22: bottom detector 25: encoder
30: Vehicle Detector
40:
50:

Claims (13)

A control method of an overhead door control system for preventing a vehicle from colliding when an overhead door is partially open,
A step S10 of judging whether or not the control unit is in the partially opened state of the door;
If the door is determined to be partially open in step S10, the controller activates a vehicle sensor signal receiving line;
S30, in which the control unit receives the vehicle detection signal from the vehicle sensor;
S50 of the controller driving the driving unit in the opening direction of the door;
Step S60 of the controller receiving a door open signal from the door position sensor;
Step S70 of the control unit terminating the operation of the driving unit;
Step S80 in which the control unit deactivates the vehicle sensor signal receiving line;
And a step S90 of causing the control unit to activate the operation unit signal reception line
When the vehicle is approaching the partially opened state of the overhead door, detects the approach and converts the overhead door into a fully opened state,

If it is determined in step S10 that the door is in the fully closed state, the control unit proceeds directly to step S80 for deactivating the vehicle sensor signal receiving line,
And maintains the overhead door in a fully closed state when the vehicle approaches in a fully closed state of the overhead door.
delete The method according to claim 1,
Between steps S30 and S50,
Determining whether an operation signal is generated from the operation unit (S40);
The control method of a vehicle collision avoidance control system for an overhead door according to claim 1, further comprising a step (S45) of inactivating the control unit signal reception line when the control unit determines that an operation signal has been generated from the operation unit in step S40 .
The method of claim 3,
If it is determined in step S40 that no operation signal is generated from the operation unit, the control unit proceeds directly to step S50 in which the driving unit is driven in the opening direction of the door.
delete delete delete delete A control method of an overhead door control system for preventing a vehicle from colliding when an overhead door is partially open,
An RS10 step in which the vehicle sensor senses the vehicle;
An RS20 step in which the relay coil R is excited to operate the door rising preparation circuit portion H;
A step RS30 in which the relay coil U 150 is energized to operate the door elevator circuit E;
Step RS40 in which the elevation of the door is stopped by the action of the upper sensor 21;
And an RS50 step in which the door rising preparation circuit part H enters a standby state in which it can respond to the detection signal of the vehicle sensor 30
When the door of the overhead door approaches the vehicle when the door is partially opened, the overhead door is detected to convert the overhead door into a fully opened state,

A step RS60 in which the b-contact limit switch D-ST 220 of the lower sensor 21 is disconnected so that the door-up prevention circuit F acts;
A step RS70 in which the relay coil R 170 is removed to block the operation of the door rising preparation circuit portion H; And
And an RS80 step in which the door ascending circuit section E waits in an operation section mode in which the operator operates the operation section 40 to raise the door
And maintains the overhead door in a fully closed state when the vehicle approaches in a fully closed state of the overhead door.
The method of claim 9,
Further comprising a step RS20-1 between the RS20 step and the RS30 step in which the timer circuit part I operates.
The method of claim 9,
Further comprising: an RS20-2 step of interrupting the operation of the door-down circuit part (G) when the vehicle is sensed between the RS20 step and the RS30 step.
The method of claim 9,
Further comprising the step of: interrupting the operation of the door-lowering circuit part (G) when the door is raised between the RS30 step and the RS40 step.
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