KR20060097245A - Apparatus for protection of driving body and method for protection of driving body - Google Patents

Abstract

The present invention is a drive body protection device for detecting the current change of the drive body when the external force is generated and driven in the direction of the external force, and sends a warning message to return to the initial state again to prevent damage and malfunction of the drive body and its It is about a method.

The drive body protection device according to the present invention is a drive body movably coupled to a stationary body and moved in a predetermined section on the stationary body by a motor, as an external force is applied to the drive body driven by the motor. A current sensor for sensing an amount of change in current flowing through the motor; An overload detector for converting the change amount of the current into a voltage value and detecting a change in the voltage value; And a driving control unit which senses a direction of the external force through the voltage value, drives the driving body in a direction in which the external force is applied, and drives the driving body to an initial position when the external force disappears.

According to the present invention, the configuration is simple and the installation space is less, but more precisely operated to effectively prevent damage and malfunction of the drive by the external force, and to protect the drive through the small parts and programs Since the device can be implemented, the production cost is reduced, and thus it is widely applied to an automatically operated application system such as an iris recognition system, thereby improving its utilization.

Description

Apparatus for protection of driving body and method for protection of driving body}

1 is a side view schematically showing a form in which a driving body according to a first embodiment of the present invention is driven.

Figure 2 is a block diagram schematically showing the components of the drive body protection device according to the first embodiment of the present invention.

Figure 3 is a block diagram schematically showing the components of the drive protection device according to a second embodiment of the present invention.

4 is a diagram illustrating a driving form of the driving body according to the second embodiment of the present invention.

5 is a graph showing a change in current appearing in the driving unit according to the second embodiment of the present invention.

6 is a table showing a manner in which the driving unit according to the second embodiment of the present invention is driven in the normal driving direction and the direction of the external force.

7 is a flowchart illustrating a driving body protection method according to the first embodiment of the present invention.

<Explanation of symbols for main parts of drawing>

100: iris recognition system 200: drive body protection device

210: driving unit 220: current sensor

230: overload detection unit 240: drive control unit

242: voltage analysis module 244: control signal transmission module

250: warning unit 300: server

The present invention relates to an apparatus and a method for protecting a driving body by detecting a malfunction of the driving body when overloaded by a force from the outside (hereinafter referred to as "external force").

The drive body which is automatically operated under the control of the motor control system may receive an external force due to an inexperienced user's operation or an external shock.

When the motor or the gear is idling by the external force in this way, it is separated from the initial position and the drive body is difficult to perform a normal function.

In particular, when an external force is applied in a direction opposite to the direction in which the driving body is operated, a device, such as a motor, a gear, an actuator, or a control system, is more likely to be damaged.

In this case, there is a limit in detecting a malfunction due to external force using a general external sensor, and it is difficult to detect a correct malfunction without a device for measuring and confirming an arbitrary position at which the driving body is separated.

For example, in the case of the iris recognition system, the eye of the user and the lens of the camera must be optically matched, and accordingly, the iris recognition system is moved according to the control signal of the control system. In the case of collision with an external object, the iris recognition system is out of the initial state, so that the iris recognition cannot be accurately performed.

As described above, if a separate device for measuring the position of any deviation is provided, the position of the iris recognition system can be confirmed and returned to the initialization state, but in this case, the configuration of the system is complicated and requires a lot of installation space. And problems such as an increase in manufacturing cost are generated.

Therefore, the present invention is an overcurrent measurement to calculate the current change amount of the drive without having to provide a separate device for measuring the position of the drive having a plurality of sensors when the force is generated from the outside of the automatically operated drive body It is an object of the present invention to provide a driving body protection device and a driving body protection method for implementing a system and body protection program to prevent damage and malfunction of the driving body.

In order to achieve the above object, the drive body protection device according to the present invention, in the drive body coupled to the fixed body and movable in a predetermined section on the fixed body by a motor, the drive driven by the motor A current sensor for sensing an amount of change in current flowing through the motor as an external force is applied to the sieve; An overload detector for converting the change amount of the current into a voltage value and detecting a change in the voltage value; And a driving control unit which senses a direction of the external force through the voltage value, drives the driving body in a direction in which the external force is applied, and drives the driving body to an initial position when the external force disappears. .

In addition, the driving control unit of the driving body protection device according to the present invention drives the driving body in the reverse direction of the original driving direction as the voltage value rises, and if the voltage value decreases, the driving of the driving body is maintained or the voltage value is increased. As it rises, the driving body is driven in the reverse direction of the original driving direction, and if the voltage value does not decrease, the driving body is driven again in the forward direction.

In addition, the drive body of the drive body protection device according to the invention is characterized in that the iris recognition system.

In addition, the drive body protection device according to the present invention is characterized in that it further comprises a warning providing unit for outputting a warning signal for the external force when the drive control unit drives the drive body in the direction in which the external force is applied.

In addition, the drive body protection device according to the present invention in order to achieve the above another object, in the drive body coupled to the fixed body and movable in a predetermined section on the fixed body by a motor, driven by the motor Abnormal load detection means for detecting an abnormal load state applied by the external force when an external force is applied while driving the driven body; It characterized in that it comprises a drive control means for driving the drive body in the direction of less load when the abnormal load is detected to prevent damage due to external force and to switch the drive body to a state capable of initial position or position recognition .

In addition, the abnormal load detection means of the drive body protection device according to the present invention is characterized in that it detects an abnormal load state through a change in the current flowing through the motor by the external force when an external force is applied during the driving of the drive body.

Further, when the abnormal load state detected by the abnormal load detecting means of the driving body protection device according to the present invention is a direction that resists the driving direction of the driving body, the driving body is temporarily driven in the opposite direction to the driving direction, In the case of cruising the driving direction of the driving body, the driving body is temporarily driven in the forward direction with respect to the driving direction to prevent damage by external force.

In order to achieve the above another object, the drive body protection method according to the present invention, in the method for driving control of the drive body coupled to the fixed body and movable in a predetermined section on the fixed body by a motor, Detecting an abnormal load state applied by the external force when an external force is applied while driving the driving body driven by the motor; If the abnormal load state is detected, driving the drive body in the reverse direction of the original driving direction and re-detecting the abnormal load state to determine whether the external force is a forward external force or a reverse external force with respect to the driving direction of the drive body; And in the case where the external force is reverse to the driving direction of the driving body as a result of the determination, the driving of the reverse direction of the driving body is temporarily maintained, and when the forward external force is the result of the determination, the driving body is temporarily driven in the forward direction to prevent damage due to external force. Characterized in that it comprises a step.

In addition, the drive body protection method according to the invention further comprises the step of switching the drive body to the initial position or position recognition state after driving the drive body in the direction of less load in response to the external force It is done.

In addition, the driving body protection method according to the invention is characterized in that it further comprises the step of performing a warning to the user through a voice or message when the abnormal load condition is detected.

Hereinafter, a driving body protection apparatus according to embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a side view schematically showing a form in which a driving body according to a first embodiment of the present invention is driven, and FIG. 2 is a block diagram schematically showing components of a driving body protection device according to a first embodiment of the present invention. It is also.

Referring to FIG. 1, the driving body 40 is movably coupled to the fixed body 20 through the motors 10 and 30, and is provided at a predetermined section on the fixed body 20 by the motors 10 and 30. Will be moved.

That is, the driving body 40 performs a linear motion on the fixed body 20 by the first motor 10, and rotates by the second motor 30. The driving body 40 may receive an unexpected external force in the process of being driven, and when the external force is generated in a direction opposite to the movement direction, the driving body 40 or the motors 10 and 30 may be damaged or may return to an initial position. Deviation can be difficult to control.

In addition, even when the external force is generated in the same direction as the movement direction, if generated faster than the movement speed of the drive body 40, the abnormal load is applied and the above-described problem may occur. In order to prevent such a problem, the driving body 40 includes a driving body protection device 50.

As shown in FIG. 2, the driving body protection device 50 includes an abnormal load detecting means 52, a driving control means 54, and a warning means 56.

The abnormal load detecting means 52 detects an abnormal load state applied by the external force when an external force is applied while the driving body 40 is being driven.

When the abnormal load is detected, the drive control means 54 drives the drive body 40 in a direction in which the load is less applied to prevent damage by external force.

At this time, the driving control means 54 drives the driving body 40 according to the state of the abnormal load, for example, if the abnormal load is applied in the opposite direction to the driving direction, the original driving operation is stopped and in the direction of the abnormal load. The drive body 40 is driven.

On the other hand, when the abnormal load is caught in the same direction as the driving direction of the drive body 40, the drive control means 54 drives the drive body 40 faster than the original drive speed in accordance with the speed of the abnormal load.

On the other hand, the warning means 56 outputs a warning message as the abnormal load detection means 52 detects an abnormal load, the warning message may be provided through a speaker or a display device.

When the warning message is output and the external force disappears, the drive control means 54 switches the drive body 40 to an initial position or a position recognition state, and the drive body 40 performs the previous operation.

Hereinafter, a second embodiment in which the driving body protection device according to the present invention is applied in more detail will be described. In the second embodiment, the driving body protection device is applied to the iris recognition system (that is, the second embodiment). Is the iris recognition system).

3 is a block diagram schematically illustrating the components of the driving body protection device 200 using the overload current according to the second embodiment of the present invention, Figure 4 is a driving body (in accordance with the second embodiment of the present invention) It is a diagram illustrating a driving form of the iris recognition system 100.

Referring to FIG. 3, the driving body protection device 200 according to the second embodiment of the present invention includes a driving unit 210, a current sensor 220, an overload detecting unit 230, a driving control unit 240, and a warning providing unit ( 250, the drive control unit 240 is configured to include a voltage value analysis module 242 and the control signal transmission module 244.

In addition, the driving unit 210 is connected to the iris recognition system 100, the iris recognition system 100 is connected to the server 300.

First, referring to FIG. 4, a driving form of the iris recognition system 100 is as follows.

The iris recognition system 100 includes a camera, an image processing module, an authentication module, and a storage means (each component of the iris recognition system 100 is not shown) to photograph the user's iris and preprocess the photographed image. If it is determined that the preprocessed image is an image that can be authenticated, it performs a function of performing authentication by comparing with stored iris data for authentication.

At this time, if it is determined that the pre-processed image is not an image that can be authenticated such as photographing a part other than the iris, the iris recognition system 100 is moved to optically match the lens of the camera and the user's eyes.

As shown in FIG. 4, the iris recognition system 100 includes an actuator or a gear, and the like, is movably coupled to the fixed body 110, and is linearly or rotationally moved on the fixed body 110. It has a structure that is moved by reciprocating the straight section (d1) or curved section (d2). Therefore, as in the above-described first embodiment, the driving unit (eg, the motor) 210 may be provided in plurality in correspondence with each driving mode to perform both linear movement and rotational movement.

At this time, the user who is familiar with the manual iris recognition system grips by hand, forcibly moves, or if there is a collision with an external object, the iris recognition system 100 which is automatically operated has a failure in a motor, a drive connecting device, or the like. Or deviation from the initial position may cause a malfunction inconsistent with the control signal.

In this case, the driving body protection device 200 according to the second embodiment of the present invention is driven in the direction of the external force described above, and after the warning message is sent back to the initial state again, the iris recognition system 100 is physically This prevents a situation that causes a malfunction or malfunction.

For convenience of description, the drive unit 210 is provided with one rotation control motor to rotate the iris recognition system 100.

Referring to FIG. 3, the driving unit 210 is a component including a motor and a driving connecting device, and when an external force is generated, the current consumption increases, unlike when operating normally.

FIG. 5 is a graph showing a change in current appearing in the driving unit 210 according to the second embodiment of the present invention. The y-axis on the graph represents a current value, and the x-axis represents time.

As shown in FIG. 5, when the current value A of the driving unit 210 in normal operation is increased (B), the current sensor 220 detects a change amount of current, which may be expressed as a resistance component.

The current sensor 220 transmits the amount of change of the detected current to the overload detection unit 230, and the overload detection unit 230 converts the change amount of the current into a voltage value.

Subsequently, the voltage value analysis module 242 of the driving controller 240 reads the converted voltage value and determines that the current A in normal operation is increased (B).

In response to the determination of the voltage value analysis module 242, the control signal transmission module 244 sends a reverse control signal to first drive the driving unit 210 in the reverse direction of the normal rotation direction, and the current sensor 220 and the overload. The detector 230 and the voltage value analysis module 242 repeat the above-described operation to continuously determine the change in the current.

As the driving unit 210 is driven in the reverse direction, when the increase value of the current returns to the normal state (C), the voltage value analysis module 242 determines that the direction of the external force is reverse, and the control signal sending module Holds and transmits the reverse control signal.

On the other hand, even if the driving unit 210 is driven in the reverse direction, if the increase value of the current does not return to the normal state, the voltage value analysis module 242 determines that the direction of the external force is the forward direction, that is, the original driving direction The control signal sending module sends the forward control signal.

In this case, the driving unit 210 is quickly driven in the forward direction to correspond to the external force in the forward direction.

6 is a table showing how the drive unit 210 according to the second embodiment of the present invention is driven according to the driving direction of the steady state and the direction of the external force. In FIG. 6, "CW" means clockwise and "CCW" means counterclockwise.

According to FIG. 6, when the driving unit 210 operates in a clockwise direction, when an external force is generated in a clockwise direction, the driving unit 210 is operated in a counterclockwise direction once and the driving control unit 240 determines the direction of the external force. The driving unit 210 is quickly driven clockwise again (F1).

On the other hand, when the external force is generated in the counterclockwise direction, the driving unit 210 is driven in the counterclockwise direction once, and the driving unit 210 maintains the counterclockwise driving as the driving control unit 240 determines the direction of the external force. (F2).

In addition, when the driving unit 210 operates in the counterclockwise direction, when the external force is generated in the clockwise direction, the driving unit 210 is operated in the clockwise direction once, and the driving unit 240 determines the direction of the external force. 210 maintains the clockwise driving again (F3).

On the other hand, when the external force is generated in the counterclockwise direction, the driving unit 210 is driven in the clockwise direction once, and as the driving control unit 240 determines the direction of the external force, the driving unit 210 is quickly driven again in the counterclockwise direction. (F4).

The warning providing unit 250 detects the control signal when the driving unit 210 is driven in the direction in which the external force is applied, and transmits a warning signal for the external force. In this case, the voice signal is transmitted through the speaker. Or a warning message can be displayed through the display device.

In addition, when the current sensor 220 detects the amount of change in the current flowing through the motor, the warning providing unit 250 may receive the signal according to the detection and transmit the warning signal.

When the user who encounters the warning signal knows that the iris recognition system 100 according to the second embodiment of the present invention is automatically operated, the current change amount of the driving unit 210 stops when an external force is applied or when an impact from an external object disappears. Will return to normal.

Therefore, when it is determined that the external force is reduced as a result of the determination of the voltage value analysis module 242, the control signal transmission module 244 transmits a control signal to move the drive unit 210 to the position of the initial state.

In this way, the drive unit 210 may initialize the position by being driven until the sensor is provided at the position of the initial state until the detection signal is sent by the sensor, and the drive unit 210 may be initialized by idling or the like. Since the position is not separated, the program information may be provided to be driven to the initial position.

The server 300 is connected to the iris recognition system 100 to database the authentication result, and performs a control function such as upgrading the information of the iris recognition system 100, for example, the warning providing unit 250 is The server 300 may be connected to the server 300 to provide a server manager with a situation in which a warning signal is transmitted.

In addition, the alert providing unit 250 may be implemented to be directly controlled by the server 300, such as receiving a warning message or voice data by the server 300 and the transmission function of the warning signal is turned on / off. Could be.

Hereinafter, a driving body protection method according to an embodiment of the present invention will be described with reference to FIG. 7, referring to each component of the driving body protection device according to the first embodiment described with reference to FIGS. 1 and 2. Let's explain.

7 is a flowchart illustrating a driving body protection method according to the first embodiment of the present invention.

According to FIG. 7, as an external force is applied while the driving body 40 is driven by a motor, the abnormal load detecting means 52 detects an abnormal load state applied by the external force (S100). For example, the abnormal load detecting means 52 may detect the amount of change in the current flowing through the motor using an element such as a variable resistor.

When the abnormal load condition is detected, the abnormal load detection means 52 notifies the warning means 56 of the abnormal load condition, and the warning means 56 outputs a warning message through a speaker or a display device (S110). .

In addition, when the abnormal load condition is detected, the abnormal load detecting means 52 determines whether the external force is a forward external force or a reverse external force with respect to the driving direction of the driving body 40, and the determination result is the drive control means 54. ).

The abnormal load detecting means 52 determines the direction of the external force as follows.

The abnormal load detecting means 52 continuously checks the current increase amount of the motor by a voltage value, and the driving control means 54 assumes that the external force acts in the opposite direction of the driving direction. Drive in the reverse direction (S120).

At this time, when the current value increased as the driving body is driven in the reverse direction (S130), since the assumption that the external force is the reverse direction is correct, the drive control means 54 maintains the reverse driving until the external force disappears (S150). ).

However, if the increased current value is not decreased (S130), the driving control means 54 determines that the external force is applied in the original driving direction (that is, the forward direction) and stops the reverse driving and switches the driving in the forward direction. (S140). At this time, since the external force is added to the original driving force, the driving control means 54 drives the driving body to follow the original driving speed.

On the other hand, as described above, as the abnormal load state by the external force is detected and a warning message is provided (S110), the user corrects his or her wrong operation, and thus the drive unit 50 is an abnormal load state by the external force Will escape.

The abnormal load detecting means 52 detects that the abnormal load has been removed (S160), and when the removal of the abnormal load is detected, the driving control means 54 recognizes the driving body 40 at an initial position or position. Switch to (S170).

As described above, the abnormal load detecting means 52 analyzes the variation of the voltage value, and when the voltage value enters the normal range as a result of the analysis, may determine that the driving body 40 is out of the abnormal load state.

Finally, the drive body returns to the state before the external force is generated to perform a normal function.

The present invention has been described above with reference to the preferred embodiments, which are merely examples and are not intended to limit the present invention, and those skilled in the art to which the present invention pertains do not depart from the essential characteristics of the present invention. It will be appreciated that various modifications and applications are not possible that are not illustrated above. For example, each component specifically shown in the embodiment of the present invention can be modified. And differences relating to such modifications and applications will have to be construed as being included in the scope of the invention defined in the appended claims.

According to the driving body protection device according to the present invention, since it is not necessary to provide a separate additional measuring device that requires a plurality of sensors, its configuration is simple and precisely operated while requiring less installation space is driven by an external force There is an effect that can more effectively prevent the damage and malfunction of the sieve.

In addition, according to the drive protection method according to the present invention, the drive protection device can be implemented through a small component and a program, the production cost is reduced, and thus is widely applied to an application system that operates automatically, such as an iris recognition system. There is an effect that can improve the utilization.

Claims (17)

A driving body coupled to a fixed body and movable in a predetermined section on the fixed body by a motor, A current sensor configured to detect an amount of change in current flowing through the motor as an external force is applied to a driving body driven by the motor; An overload detector for converting the change amount of the current into a voltage value and detecting a change in the voltage value; And And a driving control unit for sensing a direction of the external force through the voltage value, driving the driving body in a direction in which the external force is applied, and driving the driving body to an initial position when the external force disappears. Protection. The method of claim 1, wherein the drive control unit As the voltage value increases, the driving body is driven in the reverse direction of the original driving direction, and when the voltage value decreases, the driving of the driving body is maintained or And driving the drive body in the reverse direction of the original driving direction as the voltage value rises, and driving the drive body again in the forward direction if the voltage value does not decrease. According to claim 2, wherein the drive control unit And driving the drive body in the reverse direction of the original driving direction as the voltage value increases, and if the voltage value does not decrease, driving the drive body again in the forward direction faster than the original driving speed. The method of claim 1, wherein the drive body Driver protection device, characterized in that the iris recognition system. The method of claim 1, wherein the drive body Driving body protection device characterized in that the rotational movement or linear movement by the motor. The apparatus of claim 1, wherein the motor is provided in plurality in correspondence with each driving mode so that the driving body can perform both rotational movement and linear movement. The method of claim 1, And a warning providing unit for outputting a warning signal for the external force when the driving control unit drives the driving body in a direction in which an external force is applied. The method of claim 1, And a warning providing unit for outputting a warning signal for the external force when the current sensor senses a change amount of current flowing through the motor. The method of claim 7 or 8, wherein the warning providing unit In outputting a warning signal, the driving body protection device, characterized in that outputs a voice signal through the speaker or displays a warning message through the display device. In the drive body is movably coupled to the fixed body, and moved in a predetermined section on the fixed body by a motor, Abnormal load detection means for detecting an abnormal load state applied by the external force when an external force is applied while driving the drive body driven by the motor; It characterized in that it comprises a drive control means for driving the drive in the direction of less load when the abnormal load is detected to prevent damage due to external force and to switch the drive to a state capable of initial position or position recognition Drive protection device. The method of claim 10, wherein the abnormal load detection means And an abnormal load state through a change in the current flowing through the motor by the external force when an external force is applied while the driving body is being driven. The method of claim 10, The abnormal load state detected by the abnormal load detecting means is any one of a direction that resists the driving direction of the driving body or a cruising direction. The method of claim 10, When the abnormal load state detected by the abnormal load detecting means is a direction that resists the driving direction of the driving body, the driving body is temporarily driven in the opposite direction to the driving direction and cruising in the driving direction of the driving body. The driving body protection device, characterized in that for temporarily driving the drive body in the forward direction with respect to the driving direction to prevent damage by external force. 11. The driving body protection apparatus according to claim 10, further comprising a warning means for warning a user through a voice or a message when the abnormal load condition is detected. In the method for driving control of the driving body coupled to the fixed body and moved by a motor in a predetermined section on the fixed body, Detecting an abnormal load state applied by the external force when an external force is applied while driving the driving body driven by the motor; If the abnormal load state is detected, driving the drive body in the reverse direction of the original driving direction and re-detecting the abnormal load state to determine whether the external force is a forward external force or a reverse external force with respect to the driving direction of the drive body; And In the case of the external force against the driving direction of the drive as a result of the determination, the driving of the reverse direction of the drive body is temporarily maintained, and in the case of the forward external force as the result of the determination, the drive is temporarily driven in the forward direction to prevent damage by external force. Drive protection method comprising the step of. The method of claim 15, further comprising the step of driving the drive in a direction of less load in response to the external force, and then switching the drive to the initial position or position recognition state, characterized in that the drive protection Way. The method of claim 15, further comprising the step of performing a warning to the user through voice or message when the abnormal load condition is detected.

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