KR102624427B1 - Magnetic proximity sensor for checking operation of railway vehicle doors - Google Patents

Abstract

The present invention relates to a magnetic proximity sensor for checking the operation of railway vehicle doors. It includes a power conversion unit that converts the input power supplied from the power input unit into driving power, and a magnetic proximity sensor that is operated by receiving driving power from the power conversion unit and detects a magnet. It includes a magnetic sensor that outputs a detection signal, and a comparison unit that compares the magnet detection signal output from the magnetic sensor with the input power supplied from the power input unit and outputs a motion detection signal of a set size according to the magnet detection. do.
According to the present invention, when applied to an electric door installed in a railway vehicle for passenger transportation such as a train, actions such as opening and locking of the door can be detected in a non-contact method, so that the door operates stably even if the passenger transportation vehicle is operated for a long period of time. Since it can be monitored and driven, it has the effect of replacing the contact type switch that is currently in use.

Description

Magnetic proximity sensor for checking operation of railway vehicle doors}

The present invention relates to a magnetic proximity sensor for checking the operation of railway vehicle doors, and more specifically, to detect operations such as opening and locking of electric doors installed in railway vehicles for passenger transportation such as trains, but also to defects in attachment and operation of the contact method. This relates to a magnetic proximity sensor for checking the operation of doors in railway vehicles that detects the movement of doors in a non-contact manner so as to protect the system for controlling the operation of doors from etc.

In general, in the case of electric doors installed in passenger transportation vehicles such as trains, sensors for opening and closing are applied to detect specified movements such as opening and closing.

Patent Publication No. 10-2010-0020616 (Reference 1) and Publication Patent No. 10-2011-0129839 (Reference 2) have been proposed as prior art related to a system for controlling the opening and closing of such an electric door.

Reference 1 above relates to a door opening and closing device for a railway vehicle, which is a door opening and closing device having a plurality of door driving units that individually open and close each door installed in each carriage of a railway vehicle, and which respectively detects the opening and closing of each door. a plurality of limit switches; It is characterized in that it includes a failure detection device that collects and detects closed doors from the plurality of limit switches when the entire door is closed, and provides a re-opening command to the corresponding door driver to reopen and close the closed doors.

In addition, Reference 2 above relates to a door control unit for a train safety management system and a method of driving the same. In the door control unit for a train safety management system, a door opening and closing mechanism driven by the door control unit, the motor a linear screw rail provided on a straight line extending from the motor shaft and rotated in forward and reverse directions; and a plurality of nut sliders rotatably coupled to the linear screw rail; and a left door and a right door fixedly coupled to the nut slider, wherein the linear screw rail has screw grooves formed in opposite directions in the left and right directions with respect to the center where the left door and the right door are closed, so as to be provided to the motor. When rotation in a single direction is achieved, both doors are configured to move in opposite directions, and a central limit switch that operates by closing the left and right doors is provided in the center of the linear screw rail to close both doors. A train safety management system characterized by a door opening and closing mechanism configured to detect and limit the opening of both doors by installing a left limit switch and a right limit switch at the maximum open positions of the left and right doors. A door control unit is proposed for .

In this way, as in References 1 and 2, a contact-type limit switch is used in the door (or door) opening and closing device (or unit) of a passenger transportation vehicle such as a railroad car for the purpose of opening and closing the door. The contact type limit switch can be used without any problems under normal installation and operating conditions.

However, when a passenger transportation vehicle is operated with the position of the contact point or the state of the switch deformed due to deformation of the above limit switch due to long-term use, a situation occurs in which the vehicle cannot be operated due to a defect in the individual product. .

Therefore, in order to prevent this situation, research is needed on a way to detect the operation of the door using a non-contact method instead of a contact switch such as a limit switch.

In addition, the application of magnetic proximity sensors used in existing industrial sites can be considered to detect the movement of doors in a non-contact manner. However, in the case of conventional magnetic proximity sensors, the voltage drop depending on the operating voltage of the sensor unit is 5 to 15. %, there is no problem with individual operations, but in the case of entrance doors, there are limitations in use because each operation is used in a linked state. Therefore, additional research to minimize the voltage drop according to the voltage used is also necessary.

Reference 1: Publication Patent No. 10-2010-0020616 Reference 2: Publication Patent No. 10-2011-0129839

The present invention was created to solve the above-mentioned problems, and the purpose of the present invention is to prevent electric access doors from defects in installation and operation of contact-type limit switches used to detect operations such as opening and locking of electric access doors. To provide protection, we provide an improved magnetic proximity sensor for checking the operation of railway vehicle doors that can detect the movement of the doors in a non-contact manner.

In addition, another object of the present invention is to provide a magnetic proximity sensor for checking the operation of a railway vehicle door that can minimize the voltage drop when checking the operation of the door so that it can be used without restrictions by linking the operation with other parts when applied to the door. .

In order to solve this technical problem, the present invention;

A power conversion unit that converts the input power supplied from the power input unit into driving power, a magnetic sensor that receives the driving power from the power conversion unit and operates to output a magnet detection signal when it detects a magnet, and a magnet detection signal from the magnetic sensor. A magnetic proximity sensor for checking door operation is provided, which includes a comparison unit that outputs a motion detection signal of a set size indicating magnet detection when input.

At this time, the power conversion unit is characterized by being composed of a DC-DC converter that converts the direct current power supplied from the power input unit into driving power, which is direct current power for driving the magnetic sensor.

In addition, the comparison unit includes a first comparator that outputs a first motion detection signal of a set size to indicate magnet detection when a magnet detection signal is input from the magnetic sensor, and a first comparator to indicate magnet detection when a magnet detection signal is input from the magnetic sensor. It is characterized in that it includes a second comparator that outputs a second motion detection signal with a set size that is opposite to the first motion detection signal.

In addition, the power conversion unit is characterized by being provided with a first capacitor to prevent a voltage drop in the output driving power.

In addition, the output terminal of the comparison unit is characterized in that a second capacitor is provided to prevent the voltage drop of the output motion detection signal.

In addition, the output side of the power conversion unit is provided with a power display LED to display the power supply state, and the output side of the magnetic sensor is provided with a status display LED to display the active or inactive state of the magnetic sensor.

According to the present invention, when applied to an electric door installed in a passenger transportation vehicle such as a train, operations such as opening and locking of the door can be detected in a non-contact manner, thereby stably monitoring the operation of the door even when the passenger transportation vehicle is operated for a long period of time. and operation is possible, so it has the effect of replacing the contact type switch that is currently in use.

In addition, according to the present invention, the operation of the door can be monitored stably for a long time, thereby reducing additional maintenance costs that may occur.

Figure 1 is a front view of a magnetic proximity sensor for checking the operation of a railway vehicle door according to an embodiment of the present invention.
Figure 2 is a side view of a magnetic proximity sensor for checking the operation of a railway vehicle door according to an embodiment of the present invention.
Figure 3 is a control configuration diagram of a magnetic proximity sensor for checking the operation of a railway vehicle door according to an embodiment of the present invention.

Hereinafter, the features of the magnetic proximity sensor for checking the operation of a railway vehicle door according to the present invention will be described in detail with reference to the accompanying drawings to understand the features.

Prior to this, the terms or words used in this specification and claims should not be construed as limited to their usual or dictionary meanings, and the inventor should appropriately define the concept of terms in order to explain his or her invention in the best way. It must be interpreted as meaning and concept consistent with the technical idea of the present invention based on the principle of definability.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are only one of the most preferred embodiments of the present invention and do not represent the entire technical idea of the present invention, so at the time of filing this application, they can be replaced. It should be understood that various equivalents and variations may exist.

Referring to Figures 1 to 3, the magnetic proximity sensor 100 for checking the operation of a railway vehicle door according to an embodiment of the present invention performs specified operations such as opening and closing of an electric door installed in a passenger transportation vehicle such as a train. It is a sensor used for the purpose of detecting and is a magnetic proximity sensor that can minimize voltage drop when detecting motion.

The magnetic proximity sensor 100 for checking the operation of railway vehicle doors of the present invention includes a power input unit 110, a power conversion unit 120 that converts the input power supplied from the power input unit 110 into driving power, and , a magnetic sensor 130 that is operated by receiving the driving power of the power conversion unit 120 and outputs a magnet detection signal when detecting the magnet 200, and the magnet detection signal output from the magnetic sensor 130. It includes a comparison unit 140 that compares the input power supplied from the power input unit 110, which is a voltage, and outputs a motion detection signal of a set size according to the detection of the magnet 200.

Of course, it is natural to further include a signal output unit 150 that outputs the motion detection signal output from the comparison unit 140 to the outside.

Here, the magnetic proximity sensor 100 of the present invention is installed on the door frame where the entrance door of a vehicle for passenger transportation is installed, and the magnet 200 detected by the magnetic sensor 130 of the magnetic proximity sensor 100 is connected to the edge of the door or the door frame. It is desirable to install it on the edge.

Hereinafter, the configuration of each part of the present invention will be described in detail.

First, the power input unit 110 provides input power for driving the magnetic proximity sensor 100, and includes a first power input terminal 111 and a second power input terminal 112. For example, input power of DC 100V can be supplied through these first and second power input terminals 111 and 112.

In addition, the power conversion unit 120 is used to convert the input power supplied from the power input unit 110 into operating power for driving the magnetic sensor 130, and is preferably configured as a DC-DC converter. Through this, the direct current power supplied from the power input unit 110 is converted into driving power, which is direct current power for driving the magnetic sensor 130, etc., and provided. In this way, by providing the power conversion unit 120 together with the magnetic proximity sensor 100, the chronic voltage drop can be reduced to a maximum of 1% or less.

In addition, the power conversion unit 120 converts the input power supplied from the power input unit 110 to prevent (or limit) the voltage drop of the output driving power (hereinafter, collectively referred to as 'prevention'). To do this, a first capacitor 160 is further provided.

Meanwhile, the magnetic sensor 130 is for detecting the magnet 200 installed in the door, and is driven by operating power converted by the power conversion unit 120 and stably supplied to continuously detect the magnet 200. When the magnet 200 is detected, a magnet detection signal is output.

This magnetic sensor 130 is a known configuration that converts and outputs a magnet detection signal in the form of a voltage or current signal when a magnetic field such as a magnet 200 is detected. When used for door detection, it is directly connected to the door. Doors can be reliably detected without contact.

In addition, the comparison unit 140 uses the voltage of the input power supplied from the power input unit 110 as a reference voltage and compares it when a magnet detection signal is input from the magnetic sensor 130 to determine a set value according to the detection of the magnet 200. Outputs a motion detection signal of size.

At this time, the motion detection signal output from the comparison unit 140 is preferably output at the same level as the voltage of the input power supplied from the power input unit 110.

To be more specific, the comparison unit 140 includes a first comparator 141 that compares the input power of the first power input terminal 111 and the magnitude of the magnet detection signal detected by the magnetic sensor 130, It includes a second comparator 142 that compares the input power of the second power input terminal 112 and the magnitude of the magnet detection signal detected by the magnetic sensor 130. According to this configuration, when the magnet detection signal is input from the magnetic sensor 130, the first comparator 141 outputs a first motion detection signal of a set size to notify the detection of the magnet 200, and the second comparator ( 142) outputs a second motion detection signal of a set size to notify the detection of the magnet 200 when the magnet detection signal is input from the magnetic sensor 130.

In this case, as an example, the first motion detection signal output from the first comparator 141 is a High signal, and the second motion detection signal output from the second comparator 142 is the opposite of the first motion detection signal. It may be a low signal. In this way, when the magnet detection signal is output from the magnetic sensor 130, the first and second motion detection signals that conflict with each other are output together, so that when detecting (or confirming) a motion such as opening or closing a door, the first or second motion is detected. Signals can be used selectively.

In addition, the first and second motion detection signals output from the comparison unit 140 are output through the signal output unit 150, and this signal output unit 150 generates a first signal that outputs the first motion detection signal. It includes an output terminal 151 and a second signal output terminal 152 that outputs a second motion detection signal.

In addition, a second capacitor 161 is connected to the output terminal of the comparison unit 140 to prevent a voltage drop of the motion detection signal of the set size output from the comparison unit 140. That is, both ends of the second capacitor 161 are connected to the output terminal of the first comparator 141 constituting the comparison unit 140 and the output terminal of the second comparator 142, so that the first and second comparators 141 and 142 Prevents voltage drop in the output motion detection signal. That is, the second capacitor 161, like the first capacitor 160 connected to the power conversion unit 120, performs the function of charging and discharging the power source, thereby inducing a stable signal output and is effective in reducing the voltage drop.

In addition, the output side of the power conversion unit 120 is provided with a power display LED 170 that displays the power supply state, and the output side of the magnetic sensor 130 displays the active or inactive state of the magnetic sensor 130. An LED 171 for status display is provided.

These power display LEDs 170 and status display LEDs 171 are composed of color LEDs that light up in different colors when power is turned on, and the operating power on the output side of the power conversion unit 120 is transmitted to the magnetic sensor 130. When supplied normally, the power display LED 170 lights up in green, and when a magnet detection signal is output as the magnetic sensor 130 detects the magnet 200, the status display LED 171 is in an active state. It is preferable that it lights up in red.

Of course, the power display LED 170 and the status display LED 171 can be of various colors.

The magnetic proximity sensor 100 of the present invention is equipped with the power display LED 170 and the status display LED 171 exposed to the outside of the case 101, and is normally operated through the power display LED 170. You can check the status, and whether the magnet is detected (or active/inactive) can be checked through the status display LED (171).

In addition, the case 101 is integrally equipped with a fixing bracket 102 so that it can be firmly fixed to the door frame where the entrance door is installed.

In addition, a magnetic sensor 130 is installed inside the case 101, and the magnetic sensor 130 can detect a magnet 200 approaching within a certain distance. For example, the detection distance of the magnetic sensor 130 may be within 7 mm, but the detection distance is not limited to this.

Therefore, when the door to which the magnet 200 is fixed performs an opening or locking operation, when the magnet 200 approaches the magnetic proximity sensor 100 within a set detection distance, the door opening or locking operation can be detected. there is.

The magnetic proximity sensor 100 for checking the operation of railway vehicle doors of the present invention converts the supplied input power into the set driving power through the power converter 120, and then uses the comparison unit 140 and the magnetic sensor ( 130), the power consumed is generated. At this time, a motion detection signal of a set size is output through comparison of the input power supplied from the power input unit 110 and the magnet detection signal output from the magnetic sensor 130, and the power is charged. By installing functional capacitors (160, 161), it is possible to prevent voltage drop and create a motion detection signal that is an output power of similar size to the input power.

In this way, the magnetic proximity sensor 100 for checking the operation of a railway vehicle door of the present invention can compensate for the voltage drop when used to check the operation of the door, thereby solving the problem of voltage drop that may occur when used as a unit. It is possible to use multiple devices connected in series, which not only simplifies the overall door control system but also reduces its size.

Hereinafter, an example of operation of a magnetic proximity sensor for checking the operation of a railway vehicle door according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3.

First, the magnetic proximity sensor 100 is installed on the door frame (or the edge of the vehicle entrance, etc.) and monitors the operation of the door where the magnet 200 is installed, such as opening or locking.

At this time, the input power supplied through the power input unit 110 is input to the power conversion unit 120 and converted into driving power to drive the magnetic sensor 130, and the driving power of the power conversion unit 120 is used for power display. It is input into the LED 170 and lights up, and through this, it is possible to visually identify from the outside that the magnetic proximity sensor 100 is operating.

In this state, when the door operates and performs an opening or locking operation, the magnet 200 provided on the door approaches the magnetic sensor 130, and the magnetic sensor 130 outputs a magnet detection signal accordingly. According to this magnet detection signal, the status display LED 171 lights up, so that whether the magnet is detected (or active/inactive state) can be visually identified from the outside.

Meanwhile, the magnet detection signal of the magnetic sensor 130 is input to the comparison unit 140 and outputs a motion detection signal of a set size.

At this time, the first and second comparators 141 and 142 constituting the comparison unit 140 output first and second motion detection signals, respectively, of set sizes that are opposite to the set sizes.

In this case, the first and second motion detection signals output from the first and second comparators 141 and 142 of the comparison unit 140 are preferably in the form of output power with a size similar to that of the input power.

The above description is merely an illustrative explanation of the technical idea of the present invention, and various modifications and variations can be made by those skilled in the art in the technical field to which the present invention pertains without departing from the essential characteristics of the present invention. The scope of protection shall be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope shall be construed as being included in the scope of rights of the present invention.

100: magnetic proximity sensor 110: power input unit
120: Power conversion unit 130: Magnetic sensor
140: comparison unit 141: first comparator
142: second comparator 150: signal output unit
160: first capacitor 161: second capacitor
170: LED for power indication 171: LED for status indication
200: magnet

Claims (6)

A power input unit including a first power input terminal and a second power input terminal to provide input power for driving the magnetic proximity sensor;
A power conversion unit including a DC-DC converter that converts the input power supplied from the power input unit into driving power, which is direct current power for driving the magnetic sensor, and a first capacitor to prevent a voltage drop of the driving power;
A magnetic sensor that receives driving power from the power conversion unit and operates to output a magnet detection signal when it detects a magnet;
A comparison unit that outputs a motion detection signal of a set size to indicate magnet detection when a magnet detection signal is input from the magnetic sensor;
The comparison unit includes a first comparator that compares the input power of the first power input terminal and the magnitude of the magnet detection signal detected by the magnetic sensor, and a first comparator that compares the input power of the second power input terminal and the magnitude of the magnet detection signal detected by the magnetic sensor. a second comparator that compares,
When a magnet detection signal is input from the magnetic sensor, the first and second comparators output, in contrast to each other, first and second motion detection signals consisting of a High or Low signal of a set size to indicate magnet detection,
A second capacitor is connected and installed between the output terminals of the first and second comparators to prevent the voltage drop of the motion detection signal output from the first and second comparators,
The first and second motion detection signals output from the first and second comparators are in the form of output power of a similar size to the input power supplied from the first and second power input terminals. Magnetic proximity sensor for motion confirmation.
delete delete delete delete According to clause 1,
A railroad car entrance door, characterized in that the output side of the power conversion unit is provided with a power display LED to display the power supply status, and the output side of the magnetic sensor is provided with a status display LED to display the active or inactive state of the magnetic sensor. Magnetic proximity sensor for motion confirmation.