KR20070045073A - Safety system for swing door using acceleration sensor and method therefor - Google Patents

Abstract

The present invention relates to a safety device that can be attached to the automatic door opening and closing, if there is an impact caused by the human body while the door is opened or closed, by detecting the acceleration due to the shock to immediately stop or reverse the drive of the automatic door impact The door is prevented from moving afterwards to prevent the accident from happening. According to an embodiment of the present invention, a door automatic door is composed of an acceleration sensor for detecting an acceleration of a door, a microprocessor for controlling an entire safety device, a memory for storing various data, and an output of the acceleration sensor as data that can be recognized by the microprocessor. Signal conversion unit for conversion, the motor drive control unit for performing a safety function, such as stopping the driving of the motor for opening and closing the door when the external shock is detected, reverse rotation, and a power supply unit for supplying power to the entire safety device.

Casement, Automatic Door, Safety Device, Acceleration Sensor

Description

SAFETY SYSTEM FOR SWING DOOR USING ACCELERATION SENSOR AND METHOD THEREFOR}

1 is a circuit block diagram showing a swing automatic door safety device according to the present invention.

2 is a view for explaining the operation of the automatic door safety device according to an embodiment of the present invention.

Figure 3 is a view from above the installation example to explain the operation of the automatic door safety device according to the present invention.

Figure 4 is a graph showing the speed and acceleration of the door to detect when there is no external impact in the automatic door safety device according to an embodiment of the present invention.

Figure 5 is a graph showing the speed and acceleration of the door to detect when an external shock is applied in the automatic door safety device according to an embodiment of the present invention.

  * Explanation of symbols for main parts of the drawings

101: acceleration sensor 102: microprocessor

103: signal conversion unit 104: memory

105: motor drive control unit 106: power supply unit

107: impact detection determination unit 201: motor drive unit installed in the door

301: Automatic door type when the door is closed

302: Automatic door type when the door is in the process of being opened or closed

303: Automatic door type when the door is opened

304: acceleration sensor

305: direction of acceleration of automatic door when the door is closed

306: direction of acceleration of automatic door when the door is in the process of opening or closing

307: direction of acceleration of automatic door when door is opened

The present invention relates to a safety device of a swing automatic door. Most automatic doors are sliding doors. Sliding automatic doors can be installed when there is a space for the door to open. However, in the case of automatic door opening, simply need to fix the door to the door frame, no additional space is required for installation and can be used immediately. Despite these advantages, the reason why most automatic doors are installed in sliding form is because of safety problems.

 Sliding door is the direction of movement of the door in the opening and closing motion irrespective of the person coming in and out, there is almost no risk of accident if only the part of the body is caught in the process of closing the door. A swing door, on the other hand, can lead to a big accident if the door is opened or closed, if there is a person in the direction of the door, if the door is hit by a person, and if the door is still moving after the person and the door are hit. . As a result, sliding automatic doors are subject to more sanctions for use than sliding automatic doors.

 The safety device that can be installed on the automatic door is usually equipped with an infrared sensor that detects infrared rays from the human body.However, since the detection area does not match the copper wire of the door, the safety device can operate even though there is no safety problem. There are disadvantages. In addition, outdoors may malfunction due to heat sources other than the human body, such as the sun. As a result, the automatic door is often used for extremely limited purposes without the safety device itself.

 The casement automatic door safety device of the present invention overcomes this general case automatic safety problem by using an acceleration sensor.

 It is an object of the present invention, even if the automatic door of the automatic type of the various types of automatic doors have more advantages than other forms, especially sliding type automatic door in space utilization and installation, construction convenience, etc., do not overcome the safety problem The present invention provides an automatic door safety device and a method using an acceleration sensor to improve a disadvantage that is not used much.

 Technical means of the present invention for achieving the above object, in a swing automatic door: an acceleration sensor capable of sensing the acceleration while the door is closed or opened; A motor driving control unit for controlling a driving unit of the motor used when opening or closing the door; A microprocessor for controlling the entire system; A memory for storing acceleration data and the like; And a power supply unit for supplying power to the entire system.

 In addition, a signal converter for converting the output of the acceleration sensor into a digital signal as needed, characterized in that it is provided as necessary.

 Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention.

 1 is a circuit block diagram showing a door automatic safety device according to an embodiment of the present invention, an acceleration sensor 101, a microprocessor 102, a signal conversion unit 103, a memory 104, a motor drive control unit 105 ), The power supply unit 106 and the like.

 The acceleration sensor 101 is attached to an appropriate position in consideration of the design of the door and outputs a change in acceleration of the door when the door is opened or closed. The microprocessor 102 periodically monitors the output of the acceleration sensor through the signal conversion unit 103 to compare the acceleration during the opening or closing of the door with the data stored in the memory 104 and the physical shock during the movement of the door. Determine the presence. If there is an impact, the microprocessor 102 controls the motor driver 105 to stop the movement of the door or to reverse the movement. The shock detection unit 107 selectively installs and uses the microprocessor 102 when it is difficult to continuously monitor the signal conversion unit 103. The shock detection unit 107 continuously monitors the output of the acceleration sensor to apply a signal to the microprocessor 102 when the acceleration due to the shock is detected so that the microprocessor 102 stops driving the motor or rotates in reverse. It plays a role.

The power supply unit 106 is a power supply unit for supplying the power of the automatic door safety device, and converts external commercial power into an appropriate power source for the automatic door safety device, or directly supplies the power installed basically to the automatic door safety device to supply the power to the automatic door safety device. Can supply

 Figure 2 shows an example of the installation form of a general automatic swing door and an example of the installation form of a automatic automatic swing door safety device according to the present invention. There are many ways to open and close doors in automatic doors, but it is common to open the door by moving the shaft connected to the door and the frame by rotating the motor forward or reverse. The circuit configuration of the swing automatic door safety device according to the present invention is very simple, and in terms of size, it is very small compared to a motor generally used. Therefore, when the safety device is attached to the motor drive unit 201 installed in the door does not affect the design or visual aspects because the safety device is not exposed to the outside.

 Figure 3 is a view showing the operation of a typical automatic opening door, a view of the door from above looking down. The directions of acceleration (305, 306, 307) of the respective accelerations are indicated when the door is closed (301), when the door is open or in the process of being closed (302), and when the door is fully open (303). The acceleration is a vector having a direction, and the acceleration direction 305 when the door is closed, the direction of acceleration 306 while moving, and the acceleration direction 307 when the door is opened are always perpendicular to the door. However, depending on whether the door is open or closed, the acceleration can have positive and negative values. The acceleration sensor 304 is attached at an appropriate position in consideration of the design of the door.

 The automatic door safety device of the present invention is a microcomputer installed therein continuously compares the output value of the accelerometer sensor with the acceleration data when the door is normally opened in advance, if abnormal acceleration caused by the human body, etc. occurs immediately contact It acts to stop the motion or move it in the reverse direction.

 A swing automatic door generally opens the entire space of the door by moving only 90 degrees, so the door's movement is not very fast. Therefore, if the speed of the automatic door is not fast, the problem that is a safety problem is not the impact that the person hits on the moving door, but if the door keeps moving even after hitting, the person falls down and the body keeps moving by the door Some are injured by jamming doors, floors, walls, or door frames.

 In Fig. 4, the relationship between the speed and acceleration of a door that is normally opened or closed is shown graphically. As shown in FIG. 4, in general, a change in acceleration occurs when the automatic door is opened or closed. In FIG. 4, a section from 0 to t1 represents a section in which the speed increases in a linear function form by the motor when the door starts to open in a stopped state. This speed change may vary depending on the type and type of motor, gear, and shaft driving the door. If the speed at which the door moves in time from 0 to t1 is in the form of a first-order function, the acceleration in the direction in which the door moves has a constant value within the same time as indicated. In FIG. 1, the section from t1 to t2 represents a section without changing the speed at which the door moves. In this section, the door is in constant velocity, and the acceleration is almost zero. In FIG. 1, a section from t2 to t3 represents a section in which the door enters a stationary state. Although there are differences depending on the type of motor, gear, and shaft driving the door, the speed is generally expressed in the form of a linear function with a negative slope. In this case, the acceleration in the interval from t2 to t3 has a negative constant value.

 In FIG. 5, the relationship between the speed and the acceleration of the door when the door is impacted by a person or another object in the process of opening or closing the door is displayed graphically. Until the impact is applied, it shows the same speed and acceleration as the graph of FIG. 4, which is a normal case, but when an impact is caused by a person or another object, an abnormal acceleration occurs. If the direction of opening the door is called the forward direction of acceleration, if it is shocked by a person or other object in the process of opening the door, it has instantaneous acceleration, and the moment of inertia caused by the process of opening the door Abnormal accelerations, positive and negative, are indicated by. Also, when the door is closed and impacted by a person or other object, it has instantaneous acceleration, and also has abnormal positive and negative acceleration in the same principle as the opening process.

 The output of the acceleration sensor is converted into a data form that can be recognized by the microprocessor through the signal converter. Depending on the type of acceleration sensor, the output comes in various forms such as voltage level output and pulse width modulation (PWM) output. The signal converter converts the output of the acceleration sensor into a data form that can be recognized by the microprocessor, such as an analog-to-digital converter.

 The microprocessor inside the swing door safety device checks the output of the acceleration sensor through the signal converter. In the normal door opening and closing operations, the acceleration change over time is the basic data, and the acceleration change over time according to the actual door movement is continuously compared. In the normal process, some basic data and difference may occur due to the vibration of the door. Therefore, the microprocessor continuously compares the actual data with the basic data in consideration of the error range of the output value of the acceleration sensor. This error range can be varied by various parts for installing doors and hinges on the door frame, and during installation, the normal acceleration change of each door is checked and stored in the built-in memory so that the microprocessor moves the data stored in the memory and the actual door. By comparing the change in acceleration accordingly, the impact on the door can be monitored.

 If the accelerometer has a digital output or the microprocessor is unable to continuously compare data while the door opens or closes, interrupts can be used. If the acceleration sensor has a digital output, the output can be recognized as an interrupt directly by the microprocessor to control the behavior of the query. When it is difficult to use the digital output of the acceleration sensor, an interrupt method is used by adding a circuit that changes the output of the acceleration sensor to a low or high digital output in normal or abnormal cases, respectively. The circuit used here is obviously dependent on the type of acceleration sensor, the type of sensor output, and the type of microprocessor.

As described above, in order to overcome the safety problem, which is the biggest problem of automatic doors, the present invention detects a shock that a person encounters in the process of opening or closing the door by using a safety device using an acceleration sensor, and immediately detects an impact when a shock is detected. Stopping or reversing the movement is effective to greatly increase the safety of the automatic door.

In addition, the space efficiency is very high compared to the sliding automatic door, and by solving the problem of the automatic automatic door that is easier to install and construction, there is an effect that can further expand the field of use of the automatic automatic door.

Claims (3)

In a swing automatic door; An acceleration sensor installed on a part of the door and monitoring the acceleration of the door and outputting the door in the process of opening or closing the door; A signal converter converting the output of the acceleration sensor into data that can be recognized by the microprocessor; A microprocessor controlling the entire safety device; Memory for use by the microprocessor to store programs, data, and the like; And Swinging automatic door safety device comprising a; power supply for supplying power to the entire safety device. In a swing automatic door; An acceleration sensor installed on a part of the door and monitoring the acceleration of the door and outputting the door in the process of opening or closing the door; A shock detection determiner which continuously monitors the output of the acceleration sensor and applies a signal to the microprocessor when the acceleration due to the shock is detected; A microprocessor controlling the entire safety device; Memory for use by the microprocessor to store programs, data, and the like; And Swinging automatic door safety device comprising a; power supply for supplying power to the entire safety device. A method of operating a swing automatic door safety device; Step 1 entering the process of opening or closing the door; Two stages of continuously monitoring the acceleration of the door movement; 3 steps to stop the door or move in the reverse direction when the abnormal acceleration is detected; 4 steps to finish the process of opening or closing the door when the abnormal acceleration is not detected; operating method of the automatic door safety device

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