KR102725505B1 - Door system that controls opening and closing of door using sensor - Google Patents

Abstract

A door system for opening and closing an entrance may include a door providing an open state or a closed state, a first sensor configured to generate a first identification signal indicating that an object does not exist and a second identification signal indicating that the object exists, an alarm device configured to transmit an alarm signal, and a processor. The processor may be configured to request the first sensor to identify the object based on receiving an open signal for switching from the closed state to the open state, control the door to rise based on receiving the first identification signal from the first sensor, control the alarm device to transmit the alarm signal based on receiving the second identification signal from the first sensor, and control the door to rise based on identifying that a specified time has elapsed from a timing at which the alarm signal is transmitted.

Description

{DOOR SYSTEM THAT CONTROLS OPENING AND CLOSING OF DOOR USING SENSOR}

The present disclosure relates to a door system that controls the opening and closing of a door using a sensor.

A door that opens and closes an entrance can be used in a work site. For example, in a logistics warehouse, in order to store logistics loaded in an internal space, the door can open or close the entrance. The door can open the entrance by rising, and close the entrance by lowering. The door can open and close automatically.

No claim or determination is made as to whether the above content can be applied as prior art related to the present disclosure.

When the door opens and closes automatically, an accident may be caused by objects located in the vicinity. For example, if a work vehicle or worker is located on the opposite side of the door, the work vehicle or worker may not be visible from the opposite side due to the door. When the door is opened and the work vehicle enters, the work vehicle or worker located on the opposite side may collide with the entering work vehicle. Or, if an object is located at the moving position of the door, an accident may occur due to a collision between the object and the door.

A door system according to one embodiment can prevent accidents by detecting surrounding objects and controlling the opening and closing of the door based on the detection results.

The technical problems to be achieved in the document are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

A door system for opening and closing an entrance may include a door positioned above the entrance, in an open state in which the entrance is opened, and configured to descend from an upper portion of the entrance to a bottom of the entrance to switch the entrance from the open state to a closed state in which the entrance is closed; a first sensor disposed above the entrance and configured to generate a first identification signal indicating that an object does not exist around the door and a second identification signal indicating that the object exists; an alarm device configured to transmit an alarm signal; and a processor operatively connected to the alarm device and the first sensor, and configured to control opening and closing of the door. The processor may be configured to request the first sensor to identify the object based on receiving an open signal for switching from the closed state to the open state, control the door to rise based on receiving the first identification signal from the first sensor, control the alarm device to transmit the alarm signal based on receiving the second identification signal from the first sensor, and control the door to rise based on identifying that a specified time has elapsed from the timing at which the alarm signal is transmitted.

According to one embodiment, the processor may be configured to request the first sensor to identify the object based on receiving a closing signal for transitioning from the open state to the closed state, control the door to descend based on receiving the first identification signal from the first sensor, and control the door to maintain the open state based on receiving the second identification signal from the first sensor.

In one embodiment, the processor may be configured to, while maintaining the open state, re-request identification of the object from the first sensor, maintain the open state until the first identification signal is received, and control the door to lower the door based on receiving the first identification signal from the first sensor.

According to one embodiment, the first sensor may include a bracket coupled to a wall or ceiling; a housing rotatably coupled to the bracket; and an infrared detection unit including a first light emitting unit configured to emit infrared light and a first light receiving unit configured to receive infrared light reflected by the object.

According to one embodiment, the first sensor may include a radar detection unit including a second light emitting unit configured to emit electromagnetic waves and a second receiving unit configured to receive electromagnetic waves reflected by the object.

In one embodiment, the processor may be configured to adjust an angle of the housing relative to the bracket.

In one embodiment, the processor may be configured to compare a first area of a sensing region detected by the first sensor with a designated second area, and adjust an angle of the housing to reduce the difference based on identifying that a difference between the first area and the second area exceeds a threshold area.

According to one embodiment, the door system may further include a detection object disposed within a side wall of the entrance; and a second sensor disposed on a side of the door facing the side wall and configured to identify the detection object.

According to one embodiment, the detection object may include a first detection object and a second detection object spaced apart from the first detection object toward the floor and adjacent to the floor. The second sensor may be configured to transmit a first signal to the processor when the second sensor is positioned at a first position corresponding to the first detection object, and to transmit a second signal to the processor when the second sensor is positioned at a second position corresponding to the second detection object. The processor may be configured to identify a normal state in which the door is normally switched to the closed state based on the first signal and the second signal sequentially received from the second sensor while the door is lowered, based on receiving a closing signal for switching from the open state to the closed state, and to identify an abnormal state that is distinguished from the normal state based on not receiving the second signal within a threshold time from the timing at which the first signal is received while the door is lowered.

According to one embodiment, the door system may further include a third sensor disposed on a lower surface of the door facing the floor of the entrance and configured to generate a first identification signal indicating that the object located on the floor does not exist and a second identification signal indicating that the object exists. The processor may be configured to, based on identifying the abnormal state, stop the descent of the door, request at least one of the first sensor or the third sensor to identify the object, and control the door to descend again based on receiving the first identification signal from the first sensor or the third sensor, and control the door to ascend based on receiving the second identification signal indicating the object from the first sensor or the third sensor.

In one embodiment, the processor may be configured to: stop the descent of the door based on the identification of the abnormal condition; request the first sensor to identify the object; control the door to descend again based on receiving the first identification signal from the first sensor; and control the door to rise based on receiving the second identification signal from the first sensor.

According to one embodiment, the door may include a buffer member covering a lower portion of the door and an elastic member disposed within the buffer member and compressible based on an external force.

According to one embodiment, the processor may be configured to: control the door so that the elastic member is compressed by further lowering the door by a specified distance from the timing when the buffer member contacts the floor after the second sensor identifies that the second sensor has passed the second position based on the first signal and the second signal that are sequentially received; control the door so that the elastic member is restored to an original state; control the door so that the second sensor is positioned again at the second position; receive the second signal again; and identify the normal state based on the re-reception of the second signal.

According to one embodiment, the detection object may include a first detection object and a second detection object spaced apart from the first detection object toward the floor and adjacent to the floor. The second sensor may be configured to transmit a first signal to the processor when the second sensor is positioned at a first position corresponding to the first detection object, and to transmit a second signal to the processor when the second sensor is positioned at a second position corresponding to the second detection object. The processor may be configured to identify a normal state in which the door is normally switched to the open state based on the second signal and the first signal sequentially received from the second sensor while the door is raised, based on receiving the open signal, and to identify an abnormal state that is distinguished from the normal state based on not receiving the first signal within a threshold time from a timing at which the second signal is received while the door is lowered.

A door system according to one embodiment can prevent accidents caused by objects by controlling the door based on the identification of the object. The door system can provide appropriate responses depending on the situation by performing different operations when opening and closing.

The effects obtainable from the present disclosure are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by a person skilled in the art to which the present disclosure belongs from the description below.

FIG. 1A is a block diagram of a door system according to one embodiment.
Figures 1b and 1c schematically illustrate a door system according to one embodiment.
FIG. 2 is a flow chart illustrating the operation of a door system according to one embodiment for closing an entrance.
FIG. 3 is a flowchart illustrating the operation of a door system according to one embodiment for opening an entrance.
Figure 4a illustrates the appearance of the first sensor.
Figure 4b is a block diagram of the first sensor.
Fig. 5a illustrates a state in which the angle of the first sensor is adjusted while the first sensor is installed.
Figure 5b illustrates a first control unit of the first sensor.
Figure 5c illustrates a second control unit of the first sensor.
FIG. 6 illustrates examples of sensing areas in which a door system according to one embodiment detects an object through a first sensor.
Figure 7 illustrates a door system according to one embodiment.

Fig. 1a is a block diagram of a door system (10) according to one embodiment. Figs. 1b and 1c schematically illustrate a door system (10) according to one embodiment.

Referring to FIG. 1a, a door system (10) according to one embodiment may include a door (100), a plurality of sensors (210, 220, 230), an alarm device (300), and a processor (400).

According to one embodiment, the door (100) may be configured to open or close the entrance (20). FIG. 1b illustrates an open state in which the entrance (20) is open. FIG. 1c illustrates a closed state in which the entrance (20) is closed. For example, the internal space and the external space may be connected to each other through the entrance (20). For example, based on the entrance (20), the external space outside the entrance (20) and the internal space inside the entrance (20) may be distinguished. The external space and the internal space may be distinguished by a side wall (30). For example, the space illustrated in FIG. 1b and FIG. 1c may be referred to as a logistics warehouse in which goods are stored within the internal space.

For example, the door (100) may be configured to open and close the inlet (20). As illustrated in FIG. 1b, in the open state, the door (100) may be positioned outside the inlet (20) to open the inlet (20). Although not illustrated, in the open state, the door (100) may be positioned above the inlet (20) to open the inlet (20). As illustrated in FIG. 1c, in the closed state, the door (100) may overlap the inlet (20) to close the inlet (20). For example, when the inlet (20) transitions from the open state to the closed state, the door (100) may close the inlet (20) by moving downward from the upper part to the lower part of the inlet (20). Conversely, when the inlet (20) is switched from a closed state to an open state, the door (100) can open the inlet (20) by moving upwardly toward the top of the inlet (20). The opening and closing of the inlet (20) can be controlled by the processor (400). According to one embodiment, the processor (400) can open or close the inlet (20) by controlling the upward movement or downward movement of the door (100).

According to one embodiment, a plurality of sensors (210, 220, 230) may be used to identify an object around the door (100). Referring to FIGS. 1B and 1C, the first sensor (210) may be installed at an upper portion of the entrance (20). The first sensor (210) may be used to detect an object located around the door (100) by sensing a portion of an internal space and/or an external space based on the entrance (20). For example, the object may be referred to as a work vehicle (41) and/or a worker (42), but this is only an example and is not limited thereto. There may be a plurality of first sensors (210).

According to one embodiment, the first sensor (210) may be an infrared detection sensor that detects an object using infrared rays, but is not limited thereto. The first sensor (210) may detect the presence, distance, and/or direction of an object using infrared rays. Since infrared rays have a longer wavelength than visible light, they may enable long-distance detection and may be less affected by lighting conditions. In addition, since infrared rays can pass through transparent materials, detection of an object may be performed accurately.

According to one embodiment, the first sensor (210) may be configured to generate an identification signal indicating the presence or absence of an object located around the door (100). For example, the first sensor (210) may be configured to generate a first identification signal indicating that an object does not exist around the door (100) based on not detecting an object located around the door (100), and a second identification signal indicating that an object exists based on detecting an object located around the door (100). The first sensor (210) may be configured to perform an operation for detecting an object within a sensing area at the request of the processor (400), and provide the generated first identification signal or second identification signal to the processor (400). The function and structure of the first sensor (210) will be described below.

In one embodiment, the alarm device (300) may be configured to transmit an alarm signal. For example, the alarm device (300) may be configured to provide a light of a specific color (e.g., red) in a specified pattern (e.g., blinking) as a visual notification signal, or to provide a warning sound as an auditory notification signal. The alarm device (300) may be placed around the door (100). For example, the alarm device (300) may be installed on a side wall (30) around the door (100). The processor (400) may be configured to control the operation of the alarm device (300).

According to one embodiment, the processor (400) may be operatively connected to the alarm device (300) and the first sensor (210). For example, the processor (400) may be configured to control the alarm device (300) and receive a first identification signal or a second identification signal from the first sensor (210) by being directly connected to the alarm device (300) and the first sensor (210) or indirectly connected through another component. The processor (400) may transmit a signal to the first sensor (210) to request detection of an object. The first sensor (210) may be configured to detect whether an object exists within a sensing area based on the signal provided from the processor (400) and generate a first identification signal or a second identification signal according to the result. The processor (400) may be configured to provide the first identification signal or the second identification signal to the processor (400).

According to one embodiment, the processor (400) can control the opening and closing of the entrance (20) by controlling the operation of the door (100). For example, when the entrance (20) is switched from an open state to a closed state, the processor (400) can control the door (100) to descend to the bottom of the entrance (20). For example, when the entrance (20) is switched from a closed state to an open state, the processor (400) can control the door (100) to rise upward from the bottom of the entrance (20). Although not shown, a motor that causes the movement of the door (100) can be provided. The processor (400) can control the movement of the door (100) by controlling the motor.

According to one embodiment, the processor (400) may be configured to identify the presence of an object around the door (100) using a plurality of sensors (210, 220, 230) and control the movement of the door (100) based on the presence of the object. For example, when the entrance (20) is switched from an open state to a closed state, the processor (400) may close the door (100) by moving the door (100) to the bottom of the entrance (20). In the open state, the entrance (20) may be closed as the door (100) located above the entrance (20) moves to the bottom of the entrance (20). At this time, when an object exists around the door (100), an accident may be caused by a collision between the door (100) and the object. For example, if the door (100) is lowered while the worker (42) is positioned at the entrance (20), the door (100) may collide with the worker, causing an accident. Or, if the work vehicle (41) is moving through the entrance (20), if the door (100) is lowered, the door (100) and the work vehicle (41) may collide, causing an accident. For example, in a closed state, the door (100), which is in contact with the floor of the entrance (20), may move from the floor of the entrance (20) to the upper part of the entrance (20), causing the entrance (20) to open. At this time, if the work vehicle (41) or the worker (42) is positioned on the opposite side with respect to the door (100), the work vehicle (41) or the worker (42) may not be visible from the opposite side due to the door (100). For example, when the entrance (20) is opened for a work vehicle (41) to pass through the entrance (20), if the door (100) is simply opened even though a worker (42) is located on the opposite side of the door (100), an accident may occur in which the work vehicle (41) collides with the worker (42) on the opposite side while passing through the entrance (20). That is, since the opposite side of the entrance (20) is not visible due to the door (100) in the closed state, an accident may occur if no warning is provided about an object located on the opposite side.

A door system (10) according to one embodiment can first identify the presence of an object around a door (100) before the door (100) moves, and perform operations based on the presence of the object, in order to prevent a safety accident.

FIG. 2 is a flow chart showing the operation of a door system (10) according to one embodiment for closing an entrance (20).

The operations described in FIG. 2 may be operations performed by the processor (400).

Referring to FIG. 2, in operation 201, the processor (400) may receive an identification signal representing an object from the first sensor (210) based on receiving a closure signal.

For example, the processor (400) may request the first sensor (210) to identify an object based on receiving a closing signal for switching the inlet (20) from an open state to a closed state. The processor (400) may provide a request signal to the first sensor (210) to perform an operation for detecting whether an object exists within a sensing area, and the first sensor (210) may detect the object based on the request signal.

According to one embodiment, the first sensor (210) may generate a first identification signal or a second identification signal depending on whether an object is identified, and provide the first identification signal or the second identification signal to the processor (400). If there is no object around the door (100), the first sensor (210) may not detect the object, generate a first identification signal indicating the absence of the object, and provide the generated first identification signal to the processor (400). If there is an object around the door (100), the first sensor (210) may detect the object, generate a second identification signal indicating the presence of the object, and provide the generated second identification signal to the processor (400).

In operation 203, the processor (400) can identify whether a first identification signal has been received.

For example, when the processor (400) receives the first identification signal, it may determine that there is no object around the door (100). Conversely, when the processor (400) receives the second identification signal, it may determine that there is an object around the door (100). When the processor (400) receives the first identification signal, operation 205 may be performed. When the processor (400) receives the second identification signal, operation 207 may be performed.

In operation 205, the processor (400) can control the door (100) to lower the door (100).

According to one embodiment, the processor (400) may determine that no object exists around the door (100) based on receiving the first identification signal. If the processor (400) determines that no object exists, the processor (400) may control the door (100) to descend. As the door (100) descends, the entrance (20) may be closed by the door (100). Since no object exists, even if the door (100) descends, no safety accident occurs, and therefore, the processor (400) may control the door (100) based on receiving the first identification signal.

In operation 207, the processor (400) can maintain the open state of the inlet (20). Maintaining the open state of the inlet (20) can be referred to as maintaining a state in which the door (100) is positioned above the inlet (20) without lowering the door (100). That is, the processor (400) can control the door (100) so that the door (100) does not move.

According to one embodiment, the processor (400) may determine that an object exists around the door (100) based on receiving the second identification signal. If the processor (400) determines that an object exists, the processor (400) may control the door (100) so that the door (100) does not descend. Since the door (100) does not descend, the entrance (20) may remain closed by the door (100). Since an object exists, if the door (100) descends, a safety accident may occur due to an impact between the object and the door (100), and therefore, the processor (400) may maintain an open state based on receiving the second identification signal.

According to one embodiment, when switching from an open state to a closed state, if an object is located around the door (100), the object may collide with the door (100), which may cause a safety accident. Therefore, the door system (10) according to one embodiment may control the door (100) so that the door (100) does not descend in order to prevent a safety accident. According to one embodiment, the processor (400) may continuously request the first sensor (210) to identify the object until a first identification signal is received. If the object does not move around the door (100), the second identification signal will be continuously received from the first sensor (210), and thus the processor (400) may maintain the open state. If the first identification signal is received from the first sensor (210) as the object moves around the door (100), the processor (400) may control the door (100) so that the door (100) descends. A door system (10) according to one embodiment can prevent safety accidents.

FIG. 3 is a flow chart showing the operation of a door system (10) according to one embodiment for opening an entrance (20).

The operations described in FIG. 3 may be operations performed by the processor (400). According to one embodiment, the operation of switching from an open state to a closed state and the operation of switching from a closed state to an open state may be different.

Referring to FIG. 3, in operation 201, the processor (400) may receive an identification signal representing an object from the first sensor (210) based on receiving an open signal.

For example, the processor (400) may request the first sensor (210) to identify an object based on receiving a closing signal for switching the inlet (20) from an open state to a closed state. The processor (400) may provide a request signal to the first sensor (210) to perform an operation for detecting whether an object exists within a sensing area, and the first sensor (210) may detect the object based on the request signal.

According to one embodiment, the first sensor (210) may generate a first identification signal or a second identification signal depending on whether an object is identified, and provide the first identification signal or the second identification signal to the processor (400). If there is no object around the door (100), the first sensor (210) may not detect the object, generate a first identification signal indicating the absence of the object, and provide the generated first identification signal to the processor (400). If there is an object around the door (100), the first sensor (210) may detect the object, generate a second identification signal indicating the presence of the object, and provide the generated second identification signal to the processor (400).

In operation 303, the processor (400) may control the alarm device (300) to transmit an alarm signal based on reception of the second identification signal.

According to one embodiment, when the processor (400) receives the first identification signal, it can control the door (100) to rise. When there is no object around the door (100), the processor (400) can receive the first identification signal from the first sensor (210). Based on the reception of the first identification signal, the processor (400) can determine that there is no object around the door (100) and control the door (100) to rise.

In contrast, when the processor (400) receives the second identification signal, the processor (400) may control the alarm device (300) to transmit an alarm signal. The processor (400) may determine that an object exists around the door (100) based on the second identification signal. In the closed state, the entrance (20) is shielded by the door (100), so that an object located on the opposite side of the door (100) may not be visible. Since the object is shielded by the door (100), a safety accident may occur if the door (100) is simply opened according to the open signal.

According to one embodiment, the alarm device (300) may be controlled by the processor (400) to transmit an alarm signal. For example, the alarm device (300) may transmit a visual signal and/or an auditory signal. For example, when a signal to open the door (100) is provided in order for a work vehicle (e.g., a work vehicle (42) of FIG. 1B) to pass through the entrance (20), a worker (e.g., a worker (41) of FIG. 1B) riding in the work vehicle attempting to pass through the entrance (20) may recognize that an object exists around the door (100) by the alarm signal transmitted from the alarm device (300). A worker positioned on the opposite side of the entrance (20) may recognize that the work vehicle will pass through the entrance (20) when the door (100) is opened by the alarm signal transmitted from the alarm device (300). A worker riding a work vehicle attempting to pass through the entrance (20) can be provided with a warning in advance to look around when passing through the entrance (20), and a worker positioned on the opposite side of the entrance (20) can anticipate the passing of the work vehicle and take refuge.

In operation 305, the processor (400) can identify whether a specified time has elapsed from the timing at which the alarm signal is transmitted.

If a specified time has elapsed from the timing at which the alarm signal is transmitted, operation 307 may be performed. If a specified time has not elapsed from the timing at which the alarm signal is transmitted, operation 309 may be performed.

In operation 307, the processor (400) can control the door (100) to rise.

According to one embodiment, the processor (400) may control the door (100) to rise based on the elapsed time of a specified period of time from the timing at which the alarm signal is transmitted. Since the alarm signal provides a warning to a worker positioned on the opposite side of the door (100), and since the specified period of time has elapsed, it is determined that the worker has time to evacuate, and the processor (400) may control the door (100) to rise. As the door (100) rises, the entrance (20) that was closed by the door (100) may be opened. Since the alarm signal has been provided in advance, a worker riding a work vehicle passing through the entrance (20) can carefully check whether there is an object that may cause an accident on the path passing through the entrance (20). Accordingly, workers passing through the entrance (20) as well as workers located on the opposite side of the entrance (20) can be prevented from safety accidents by being given a warning in advance.

In operation 309, the processor (400) can maintain the closed state of the inlet (20). Maintaining the closed state of the inlet (20) can be referred to as maintaining the state in which the door (100) is in contact with the floor of the inlet (20) without raising the door (100). That is, the processor (400) can control the door (100) so that the door (100) does not move.

According to one embodiment, the processor (400) can maintain the closed state by not moving the door (100) if a specified time has not elapsed. Since there is an object around the door (100), a warning by an alarm signal can be provided, and a warning can be provided in advance to a worker trying to pass through the entrance (20) as well as a worker located on the opposite side of the entrance (20), and time required to prevent a safety accident can be provided. For example, a worker performing work on the opposite side of the entrance (20) can be provided time to move around the door (100), and thus a safety accident can be prevented in advance.

The door system (10) according to one embodiment may perform different operations depending on whether the entrance (20) is opened or closed. As described in FIG. 2, when the entrance (20) is closed, the door (100) may not be moved when an object exists. As described in FIG. 3, when the entrance (20) is opened, when an object exists, an alarm signal may be transmitted and the door (100) may be moved after a specified time has elapsed. When the entrance (20) is closed, since the door (100) descends, the door system (10) may not allow the door (100) to be moved in order to prevent an accident due to a collision between the door (100) and the object. However, when the entrance (20) is opened, the door (100) rises, so a situation in which the door (100) and the object collide does not occur, so the door system (10) can provide a warning, provide time according to the warning, and then allow the door (100) to move.

If the entrance (20) is opened, if the door (100) is not moved because an object exists, a problem may arise in which the entrance (20) is not opened by an object around the door (100). For example, if an object is identified as an object around the door (100), when the entrance (20) is opened after a warning is provided, a worker passing through the entrance (20) can move the object and then pass through in a work vehicle. However, if the door (100) is kept closed according to the identification of the object, the door (100) is not opened by the object, so the closed state of the entrance (20) is unnecessarily maintained, and the problem may not be resolved. In addition, in a disaster situation such as a fire accident, if the entrance (20) is not opened by an object, a bigger accident may occur. The door system (10) according to one embodiment can prevent safety accidents in advance and prevent a situation in which the entrance (20) is unnecessarily closed by performing different operations depending on whether the entrance (20) is opened or closed.

Fig. 4a illustrates the appearance of the first sensor (210). Fig. 4b is a block diagram of the first sensor (210).

According to one embodiment, the first sensor (210) may have a dual function including the functions of both an infrared sensor and a radar sensor. Referring to FIGS. 4A and 4B, the first sensor (210) may include a bracket (211), a housing (212), an infrared detection unit (213), and a radar detection unit (215).

According to one embodiment, the bracket (211) can be attached to a wall or a ceiling. For example, the bracket (211) can be fixed to a wall surface of a side wall (30) including an inlet (20). Alternatively, the bracket (211) can be fixed to a ceiling located above the inlet (20). For example, the bracket (211) can be fixed by a screw, but is not limited thereto.

According to one embodiment, the housing (212) can protect components of the first sensor (210) and form an exterior of the first sensor (210). The housing (212) can be rotatably coupled to the bracket (211). For example, when the bracket (211) is fixed to a wall or a ceiling, the housing (212) can be rotatably coupled to the bracket (211). Since the infrared detection unit (213) and the radar detection unit (215) are arranged within the housing (212), the sensing area can be adjusted by rotating the housing (212) with respect to the bracket (211). For example, the first sensor (210) can include a first adjustment unit (214) that can adjust the rotation of the housing (212) with respect to the bracket (211).

According to one embodiment, the infrared detection unit (213) can detect an object using infrared rays. For example, the infrared detection unit (213) can identify an object by emitting infrared rays and detecting infrared rays reflected from the object.

According to one embodiment, the radar detection unit (215) can detect an object using electromagnetic waves. For example, the radar detection unit (215) can detect an object using electromagnetic waves. The radar detection unit (215) can identify an object by emitting electromagnetic waves and detecting electromagnetic waves reflected from the object.

According to one embodiment, the first sensor (210) may include a second adjusting unit (216) for adjusting a sensing area of the radar detection unit (215). The size of the sensing area may be adjusted by operating the second adjusting unit (216). The first sensor (210) may detect an area sensed by the infrared detection unit (213) and an area sensed by the radar detection unit (215). The total sensing angle of the first sensor (210) may be referred to as the sum of the sensing angle of the infrared detection unit (213) and the sensing angle of the radar detection unit (215).

Referring to FIG. 4b, the infrared detection unit (213) may include a first light-emitting unit (213a) and a first light-receiving unit (213b). The first light-emitting unit (213a) may be configured to emit infrared rays. For example, the first light-emitting unit (213a) may emit infrared rays to the sensing area of the infrared detection unit (213) based on an angle set by the first adjusting unit (214). Infrared rays emitted from the first light-emitting unit (213a) may be reflected by an object, and the first light-receiving unit (213b) may be configured to receive the infrared rays reflected by the object. For example, the first light-receiving unit (213b) may include, but is not limited to, an IR photodiode, a MOSFET, and/or a potentiometer in order to receive infrared rays. The infrared detection unit (213) can generate a first identification signal or a second identification signal to indicate the presence or absence of an object based on infrared rays reflected from the object, and provide the generated first identification signal or second identification signal to the processor (400).

According to one embodiment, the radar detection unit (215) may include a second light emitting unit (215a) and a second light receiving unit (215b). The second light emitting unit (215a) may be configured to emit electromagnetic waves. For example, the second light emitting unit (215a) may emit infrared rays to a sensing area of the radar detection unit (215) based on an angle set by the second adjusting unit (216). The electromagnetic waves emitted from the second light emitting unit (215a) may be reflected by an object, and the first light receiving unit (213b) may be configured to receive the electromagnetic waves reflected by the object. The radar detection unit (215) may generate a first identification signal or a second identification signal for indicating the presence or absence of an object based on the electromagnetic waves reflected by the object, and provide the generated first identification signal or the second identification signal to the processor (400).

According to one embodiment, the infrared detection unit (213) can accurately provide identification of an object located at a relatively short distance, and can identify the object based on temperature. The radar detection unit (215) can accurately provide identification of an object located at a relatively long distance, and can provide information related to movement of the object (e.g., movement speed). The first sensor (210) can provide a first identification signal or a second identification signal related to the object to the processor (400) using the infrared detection unit (213) and/or the radar detection unit (215).

Fig. 5a illustrates a state in which the angle of the first sensor (210) is adjusted when the first sensor (210) is installed. Fig. 5b illustrates a first adjustment unit (214) of the first sensor (210). Fig. 5c illustrates a second adjustment unit (216) of the first sensor (210).

Referring to FIG. 5A, the housing (212) may be rotatable with respect to the bracket (211). For example, the processor (400) may control the housing (212) to rotate with respect to the bracket (211). Although not shown, a rotation motor for rotating the housing (212) with respect to the bracket (211) may be provided in the first sensor (210), and the processor (400) may control the rotation motor to rotate the housing (212) with respect to the bracket (211). For example, assuming that the angle at which the front surface of the housing (212) faces the floor is 0 degrees and the angle at which the front surface of the housing (212) faces the ceiling (31) is 180 degrees, the housing (212) may be rotated between 0 degrees and 180 degrees.

For example, when the bracket (211) is coupled to the ceiling (31), the direction in which the housing (212) faces can be adjusted as the housing (212) is rotated at angles of 15 degrees, 30 degrees, and 45 degrees. The infrared detection unit (213) and the radar detection unit (215) can be configured to emit infrared or electromagnetic waves toward the front of the housing (212). Therefore, the detection angle of the infrared detection unit (213) can be adjusted according to the angle of the housing (212). When the detection angle of the infrared detection unit (213) is adjusted, the sensing area of the infrared detection unit (213) can be adjusted. For example, when the bracket (211) is coupled to the wall (32), the direction in which the housing (212) faces can be adjusted as the housing (212) is rotated at angles of 15 degrees, 30 degrees, and 45 degrees. The posture of the housing (212) corresponding to rotation angles of 15 degrees, 30 degrees, and 45 degrees when the bracket (211) is coupled to the wall (32) and the posture of the housing (212) corresponding to rotation angles of 15 degrees, 30 degrees, and 45 degrees when the bracket (211) is coupled to the ceiling (31) may be different. According to one embodiment, the first sensor (210) may be installed on the ceiling (31) or the wall (32) depending on the sensing area. For example, when it is desired to sense a relatively distant area, the first sensor (210) may be coupled to the ceiling (31). For example, when it is desired to sense a relatively close area, the first sensor (210) may be coupled to the wall (32). However, the present invention is not limited thereto.

Referring to FIG. 5b, the first adjusting unit (214) may be configured to adjust the housing (212) relative to the bracket (211) in order to adjust the sensing area of the infrared sensing unit (213). For example, the first adjusting unit (214) may include a first scale (214a) indicating a rotation angle of the housing (212) when the first sensor (210) is installed on a ceiling, and a second scale (214b) indicating a rotation angle of the housing (212) when the first sensor (210) is installed on a wall. The rotation angle of the housing (212) may correspond to the detection angle of the infrared sensing unit (213).

When the user wants to adjust the detection angle of the infrared detection unit (213) installed on the ceiling, the user can set the angle by looking at the first scale (214a). When the user wants to adjust the detection angle of the infrared detection unit (213) installed on the wall, the user can set the angle by looking at the second scale (214b). According to one embodiment, the processor (400) can control the first adjusting unit (214) so that the housing (212) rotates with respect to the bracket (211) at a rotation angle corresponding to the user input based on receiving a user input regarding the detection angle of the infrared detection unit (213). For example, a rotation motor is coupled inside the first adjusting unit (214), and the processor (400) can control the rotation motor. As the detection angle of the infrared detection unit (213) is adjusted, the sensing area of the infrared detection unit (213) can be adjusted.

Referring to FIG. 5c, the second adjustment unit (216) may be configured to adjust the sensing area of the radar detection unit (215). For example, as the second adjustment unit (216) is adjusted, the detection angle of the radar detection unit (215) may be adjusted. For example, the detection angle of the radar detection unit (215) may have a range of -8 degrees to 22 degrees, but is not limited thereto. The scale (216a) of the second adjustment unit (216) may indicate the detection angle. The second adjustment unit (216) may be controlled by the processor (400) or may be controlled by a manual operation of a user. For example, the processor (400) may control the second adjustment unit (216) so that the radar detection unit (215) detects an object at a detection angle corresponding to the user input based on receiving a user input for adjusting the detection angle of the radar detection unit (215). As another example, a user can adjust the detection angle of the radar detection unit (215) by manually authoring the second adjustment unit (216). As the detection angle of the radar detection unit (215) is adjusted, the sensing area of the radar detection unit (215) can be adjusted.

FIG. 6 illustrates examples of sensing areas in which a door system (10) according to one embodiment detects an object through a first sensor (210).

Referring to FIG. 6, the sensing area (600) of the first sensor (210) can be determined by the first area (601) corresponding to the sensing area of the infrared detection unit (213) and the second area (602) corresponding to the sensing area of the radar detection unit (215). For example, the sensing angle of the first sensor (210) can be referred to as the sum of the sensing angle of the infrared detection unit (213) and the sensing angle of the radar detection unit (215).

600a of FIG. 6 illustrates a sensing area (600) according to the first area (601) and the second area (602) when the detection angle of the infrared detection unit (213) is 30 degrees and the detection angle of the radar detection unit (215) is -8 degrees. In this case, the detection angle of the first sensor (210) can be referred to as 22 degrees.

600b of FIG. 6 illustrates a sensing area (600) according to the first area (601) and the second area (602) when the detection angle of the infrared detection unit (213) is 30 degrees and the detection angle of the radar detection unit (215) is 0 degrees. In this case, the detection angle of the first sensor (210) can be referred to as 30 degrees.

600c of FIG. 6 illustrates a sensing area (600) according to the first area (601) and the second area (602) when the detection angle of the infrared detection unit (213) is 30 degrees and the detection angle of the radar detection unit (215) is +11 degrees. In this case, the detection angle of the first sensor (210) can be referred to as 41 degrees.

Referring to FIG. 6, as the first detection angle and the second detection angle are adjusted, the first region (601) and the second region (602) can be adjusted. The sensing region (600) determined by the first region (601) and the second region (602) can be adjusted as the first region (601) and the second region (602) are adjusted. For example, depending on the shape of the entrance (20), the arrangement structure of the door (100), and the shape of the side wall (30), the detection angle of the first sensor (210) suitable for identifying an object is set, thereby enabling adjustment of the sensing region (600) using the first sensor (210).

According to one embodiment, the sensing area (600) may be determined based on the first sensing angle and the second sensing angle. According to one embodiment, the processor (400) may be configured to adjust the sensing area (600) by adjusting the first sensing angle and/or the second sensing angle.

According to one embodiment, the processor (400) may be configured to compare a first area of a sensing region (600) detected by the first sensor (210) with a designated second area. For example, the processor (400) may identify a first area of a sensing region (600) determined based on a detection angle of an infrared detection unit (213) and a detection angle of a radar detection unit (215), and compare the identified first area with a designated second area. The second area may be referred to as an area of a detection region of an object required to prevent a safety accident. The second area may be determined based on the shape of the entrance (20), the arrangement structure of the door (100), and the shape of the side wall (30). For example, when the door (100) is large, the second area may also be relatively large, and when the door (100) is small, the second area may also be relatively small, but is not limited thereto.

According to one embodiment, the processor (400) may adjust the sensing area (600) to reduce the difference based on identifying that the difference between the first area and the second area exceeds the threshold area. Since the detection angle of the infrared detection unit (213) is adjusted as the angle of the housing (212) with respect to the bracket (211) is adjusted, the sensing area (600) may be adjusted. For example, when the difference between the first area and the second area is greater than the threshold area, it may be the case that the first area of the sensing area (600) is too small or too large, so that the object is not properly identified. In this case, the processor (400) may adjust the detection angle of the infrared detection unit (213) and/or the detection angle of the radar detection unit (215) so that the difference between the first area and the second area becomes within the threshold area. For example, the processor (400) may be configured to adjust the angle of the bracket (211) of the housing (212) to reduce the difference. As the first area is adjusted, identification of the object using the first sensor (210) can be performed accurately and stably. The door system (10) according to one embodiment can prevent safety accidents caused by objects.

Figure 7 illustrates a door system (10) according to one embodiment.

The door system (10) according to one embodiment may further include a second sensor (220) and/or a third sensor (230).

According to one embodiment, while the door (100) is controlled to descend or ascend based on the reception of a second identification signal indicating that an object does not exist, a situation may occur in which an object approaches the vicinity of the entrance (20). In this case, since the object is not identified through the first sensor (210), the door (100) may descend or ascend, which may cause an accident due to a collision between the object and the door (100). To prevent this, the door system (10) according to one embodiment may utilize the first sensor (210), the second sensor (220), and/or the third sensor (230).

Referring to FIG. 7, a detection target (33) may be placed within a side wall (30) of an entrance (20), and a second sensor (220) for detecting the detection target (33) may be provided. For example, the detection target (33) may be a magnetic body, and the second sensor (220) may be a Hall sensor that can identify proximity to a magnetic body based on the Hall effect. However, the present invention is not limited thereto. For example, the second sensor (220) may be placed on a side of the door (100) facing the side wall (30). The second sensor (220) may be used to identify the detection target (33).

According to one embodiment, the detection target (33) may be plural. For example, the detection target (33) may include a first detection target (33a) and a second detection target (33b). The first detection target (33a) may be spaced from the first detection target (33a) toward the floor, thereby being adjacent to the floor. That is, the first detection target (33a) may be positioned above the second detection target (33b), and the second detection target (33b) may be positioned below the first detection target (33a). The second sensor (220) may be positioned on the side of the door (100) facing the sidewall (30) where the first detection target (33a) and the second detection target (33b) are positioned. However, the present invention is not limited thereto. For example, a fourth sensor (222) substantially identical to the second sensor (220), a third detection object (33c) corresponding to the first detection object (33a), and a fourth detection object (33d) corresponding to the second detection object (33b) may be further provided. Hereinafter, for convenience of explanation, the operations of the second sensor (220), the first detection object (33a), and the second detection object (33b) are described, but the descriptions may be equally applied to the fourth sensor (222), the third detection object (33c), and the fourth detection object (33d).

In one embodiment, as the door (100) transitions from an open state to a closed state, the door (100) may descend toward the floor. While the door (100) descends, the second sensor (220) disposed on the side of the door (100) may move from the top of the entrance (20) toward the floor. As the second sensor (220) descends, the second sensor (220) may be positioned at a first position corresponding to the first detection target (33a). The first position may be referred to as a position where the second sensor (220) and the first detection target (33a) are disposed closest to each other, and where the second sensor (220) faces the first detection target (33a). At the first position, the second sensor (220) may be configured to generate a first signal representing the first detection target (33a) and transmit the first signal to the processor (400). When transitioning to a closed state, the processor (400) can identify that the second sensor (220) has passed the first location based on reception of the first signal.

The door (100) may continue to descend so that the second sensor (220) may be positioned at a second position corresponding to the second detection target (33b). The second position is a position where the second sensor (220) and the second detection target (33b) are positioned closest to each other, and may be referred to as a position where the second sensor (220) faces the second detection target (33b). At the second position, the second sensor (220) may be configured to generate a second signal representing the second detection target (33b) and transmit the second signal to the processor (400). When transitioning to a closed state, the processor (400) may identify that the second sensor (220) has passed through the second position based on the reception of the second signal. The second detection target (33b) may be positioned adjacent to the floor of the entrance (20).

According to one embodiment, the processor (400) may identify a normal state in which the door (100) is normally switched to a closed state based on a first signal and a second signal sequentially received at a predetermined time interval from the second sensor (220) while the door (100) is lowered based on receiving a closing signal. If the processor (400) receives the second signal after receiving the first signal, it may identify that the door (100) is normally lowered and the entrance (20) is normally closed.

According to one embodiment, the processor (400) may be configured to identify an abnormal state, which is distinguished from a normal state, based on not receiving a second signal within a threshold time from the timing of receiving a first signal while the door (100) is lowered. The abnormal state may be a state in which the door (100) is not lowered normally, and may be a state in which, for example, a problem such as an object being caught between the door (100) and the entrance (20) has occurred. If the processor (400) continues to control the door (100) to continue to descend in the abnormal state, an accident due to a collision between the object and the door (100) may occur. For example, if the door (100) continues to descend while an object is caught between the door (100) and the entrance (20), the door (100) may be broken or the object may be damaged. In this case, the processor (400) may stop the operation of the door (100).

According to one embodiment, the processor (400) may stop the movement of the door (100) based on identifying an abnormal condition and request the first sensor (210) to identify an object. The first sensor (210) may detect the object again based on the request. If the object is not detected, the first sensor (210) may provide a first identification signal to the processor (400). If the object is detected, the first sensor (210) may provide a second identification signal to the processor (400).

According to one embodiment, the processor (400) can control the door (100) to descend again based on receiving the first identification signal from the first sensor (210). Since the first identification signal indicates that an object does not exist, the timing of reception of the first signal and the second signal is misaligned due to a malfunction of the door (100), and therefore, the processor (400) can lower the door (100) again. According to one embodiment, the processor (400) can control the door (100) to rise again based on receiving the second identification signal from the first sensor (210). Since the second identification signal indicates that an object exists, the timing of reception of the first signal and the second signal is misaligned due to an object, not a malfunction of the door (100), and therefore, the processor (400) can raise the door (100) again. As the door (100) rises again, the entrance (20) becomes open, and a safety accident can be prevented. According to one embodiment, the processor (400) can control the alarm device (300) to transmit an alarm signal based on the reception of the second identification signal. The operator can recognize that there is an abnormality through the alarm signal.

The above description has been described in the case of transition from an open state to a closed state, but the above descriptions may be equally applied to a case of transition from a closed state to an open state. For example, the processor (400) may control the door (100) to rise based on receiving an open signal. While the door (100) rises, the processor (400) may identify a normal state in which the door is normally transitioned to the open state based on a second signal and a first signal sequentially received from the second sensor (220). When the door (100) rises, since the second sensor (220) passes the second detection object (33b) and then the first detection object (33a), the second signal may be received first and the first signal may be received next. The processor (400) may identify a normal state based on the second signal and the first signal sequentially received. The processor (400) can identify an abnormal state that is distinct from a normal state based on not receiving the first signal within a threshold time from the timing of receiving the second signal while the door (100) is lowered. In this case, the processor (400) can request identification of an object from the first sensor (210) and perform subsequent operations according to the reception of the first identification signal or the second identification signal.

The door system (10) according to one embodiment may further include a buffer member and an elastic member. For example, the buffer member may cover the bottom of the door (100). The bottom of the door (100) may be referred to as a portion of the door (100) that contacts the bottom surface of the inlet (20) in a closed state. The buffer member may include a material capable of absorbing shock. For example, the buffer member may include, but is not limited to, polyethylene foam, EVA (Ethylene Vinyl Acetate), polyurethane foam, pulp mold, and/or ABS (Acrylonitrile Butadiene Styrene).

In one embodiment, the elastic member may be included within the buffer member. The elastic member may have compressible flexibility. When an external force is applied to the elastic member, the elastic member may be compressed, and when the external force is removed, the elastic member may be restored to its original state.

According to one embodiment, the processor (400) may control the door (100) to move further a specified distance from the timing when the buffer member contacts the floor after the second sensor (220) identifies that the second position has passed based on the first signal and the second signal that are sequentially received, so that the elastic member is compressed. In other words, when the entrance (20) is closed by the door (100), the buffer member may contact the floor of the entrance (20). After the timing when the buffer member contacts the floor of the entrance (20), the processor (400) may further lower the door (100) by the specified distance. As the door (100) is lowered, the elastic member disposed within the buffer member may be compressed. As the elastic member is compressed, the second detection object (33b) is adjacent to the floor surface, so the second sensor (220) can move further downward through the second detection object (33b).

In one embodiment, the processor (400) can control the door (100) to return the elastic member to its original state, thereby controlling the door (100) to return the second sensor (220) to its second position, thereby re-receiving the second signal. The processor (400) can then raise the door (100) again, in which case the door (100) can be raised by an additional specified distance as the compressive member is restored. As the door (100) rises, the second sensor (220) can be re-received to the second position. The second sensor (220), by being positioned at the second position, can again provide the second signal representing the second detection target (33b) to the processor (400). The processor (400) can be configured to identify a normal state based on re-receiving the second signal. That is, the processor (400) can identify a normal state based on sequentially receiving the first signal and the second signal (primary) and then receiving the second signal (secondary) again. The door system (10) according to one embodiment can resolve a situation in which an abnormal state is identified as a normal state due to a malfunction by performing the above-described operation. For example, a situation in which the door (100) must rise again may occur due to an unexpected event that occurs after the sequential reception of the first signal and the second signal. Since the processor (400) determines a normal state based on the second signal received secondarily, if the second signal is not received again, the processor (400) can identify the abnormal state and detect the object again.

The door system (10) according to one embodiment may further include a third sensor (230) disposed on the lower surface of the door (100) facing the floor of the entrance (20). The third sensor (230) may include, but is not limited to, three sensors (231, 232, 233) spaced apart from each other on the lower surface. Since the third sensor (230) faces the floor of the entrance (20), it may be used to identify an object placed on the floor. The processor (400) may request the first sensor (210) and/or the second sensor (220) to identify the object based on identifying an abnormal state. For example, since the first sensor (210) is disposed above the entrance (20), it may not be able to identify an object placed on the floor. In order to accurately identify an object placed on the floor, a third sensor (230) disposed on the lower surface of the door (100) may be further provided. A door system (10) according to one embodiment can prevent an accident by identifying an object in an abnormal state using a first sensor (210) and/or a third sensor (230).

It should be understood that the various embodiments of this document and the terminology used herein are not intended to limit the technical features described in this document to specific embodiments, but include various modifications, equivalents, or substitutes of the embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of the items, unless the context clearly dictates otherwise. In this document, each of the phrases "A or B", "at least one of A and B", "at least one of A or B", "A, B, or C", "at least one of A, B, and C", and "at least one of A, B, or C" can include any one of the items listed together in the corresponding phrase, or all possible combinations thereof. Terms such as "first", "second", or "first" or "second" may be used merely to distinguish one component from another, and do not limit the components in any other respect (e.g., importance or order). When a component (e.g., a first component) is referred to as "coupled" or "connected" to another (e.g., a second component), with or without the terms "functionally" or "communicatively," it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component.

According to various embodiments, each of the components described above may include a single or multiple entities, and some of the multiple entities may be separately arranged in other components. According to various embodiments, one or more of the components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, the multiple components may be integrated into one component. In such a case, the integrated component may perform one or more functions of each of the multiple components identically or similarly to those performed by the corresponding component of the multiple components before the integration. According to various embodiments, the operations performed by a module, a program, or other component may be executed sequentially, in parallel, repeatedly, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

Claims (14)

In a door system that opens and closes the entrance,
A door positioned above the inlet, within an open state in which the inlet is open, and configured to descend from the upper portion of the inlet to the bottom of the inlet in order to switch the inlet from the open state to the closed state in which the inlet is closed;
A first sensor disposed above the entrance and configured to generate a first identification signal indicating that an object does not exist around the door and a second identification signal indicating that an object exists;
An alarm device configured to transmit an alarm signal; and
A processor operatively connected to the alarm device and the first sensor and configured to control the opening and closing of the door;
The above processor,
Based on receiving an open signal for transitioning from the closed state to the open state, requesting the first sensor to identify the object,
Based on receiving the first identification signal from the first sensor, controlling the door to rise,
Controlling the alarm device so that the alarm signal is transmitted based on receiving the second identification signal from the first sensor;
Based on identifying that a specified time has elapsed from the timing at which the alarm signal is transmitted, the door is controlled to rise.

A detection target placed within the side wall of the above entrance; and
further comprising a second sensor disposed on the side of the door facing the side wall and for identifying the detection target;

The above detection target is,
A first detection target and a second detection target adjacent to the floor, spaced apart from the first detection target toward the floor,
The second sensor above,
When the second sensor is positioned at a first location corresponding to the first detection target, a first signal is transmitted to the processor,
When the second sensor is positioned at a second location corresponding to the second detection target, a second signal is transmitted to the processor,
The above processor,
Based on receiving a closing signal for transitioning from the open state to the closed state, while the door is lowered, a normal state in which the door is normally transitioned to the closed state is identified based on the first signal and the second signal sequentially received from the second sensor,
It is configured to identify an abnormal state that is distinguished from the normal state based on not receiving the second signal within a threshold time from the timing of receiving the first signal while the door is lowering,

Further comprising a third sensor arranged on the lower surface of the door facing the floor of the entrance and configured to generate a first identification signal indicating that the object located on the floor does not exist and a second identification signal indicating that the object exists,
The above processor,
Based on identifying the above abnormal condition, stopping the descent of the door and requesting identification of the object from at least one of the first sensor or the third sensor,
Controlling the door so that the door descends again based on receiving the first identification signal from the first sensor or the third sensor;
configured to control the door to rise based on receiving the second identification signal representing the object from the first sensor or the third sensor;
Door system.
In the first paragraph,
The above processor,
Based on receiving a closing signal for transitioning from the open state to the closed state, requesting the first sensor to identify the object,
Based on receiving the first identification signal from the first sensor, controlling the door to descend;
configured to control the door to maintain the open state based on receiving the second identification signal from the first sensor;
Door system.
In the second paragraph,
The above processor,
While maintaining the above open state, request the first sensor to identify the object again,
Maintaining the open state until the first identification signal is received;
configured to control the door to lower the door based on receiving the first identification signal from the first sensor;
Door system.
In the first paragraph,
The above first sensor,
A bracket that attaches to a wall or ceiling;
a housing rotatably coupled to the above bracket; and
An infrared detection unit including a first light emitting unit configured to emit infrared rays and a first light receiving unit configured to receive infrared rays reflected by the object.
Door system.
In paragraph 4,
The above first sensor,
A radar detection unit including a second light emitting unit configured to emit electromagnetic waves and a second receiving unit configured to receive electromagnetic waves reflected by the object.
Door system.
In paragraph 5,
The above processor,
configured to adjust the angle of said housing relative to said bracket;
Door system.
In Article 6,
The above processor,
Compare a first area of a sensing area detected by the first sensor with a designated second area,
Based on identifying that the difference between the first area and the second area exceeds a critical area, the angle of the housing is adjusted to reduce the difference.
Door system.
delete delete delete In the first paragraph,
The above processor,
Based on the identification of the above abnormal condition, the lowering of the door is stopped and the first sensor is requested to identify the object,
Based on receiving the first identification signal from the first sensor, controlling the door to lower the door again;
configured to control the door so that the door rises based on receiving the second identification signal from the first sensor;
Door system.
In the first paragraph,
The above door,
A buffer member covering the lower part of the door and an elastic member disposed within the buffer member and compressible based on an external force,
Door system.
In Article 12,
The above processor,
Based on the first signal and the second signal received sequentially, after the second sensor identifies that the second location has passed, the door is controlled so that the elastic member is compressed by lowering the door further by a specified distance from the timing when the buffer member contacts the floor.
By controlling the door so that the elastic member is restored to its original state, the second signal is received again by controlling the door so that the second sensor is positioned again at the second position,
Based on re-receiving the second signal, configured to identify the normal state,
Door system.
In the first paragraph,
The above detection target is,
A first detection target and a second detection target adjacent to the floor, spaced apart from the first detection target toward the floor,
The second sensor above,
When the second sensor is positioned at a first location corresponding to the first detection target, a first signal is transmitted to the processor,
When the second sensor is positioned at a second location corresponding to the second detection target, a second signal is transmitted to the processor,
The above processor,
Based on receiving the above open signal, while the door is rising, a normal state in which the door is normally switched to the open state is identified based on the second signal and the first signal sequentially received from the second sensor,
configured to identify an abnormal state that is distinct from the normal state based on not receiving the first signal within a threshold time from the timing of receiving the second signal while the door is lowering.
Door system.

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