KR20190037656A - Apparatus and method for diagnosis relay welding - Google Patents

Abstract

The present invention relates to a device and a method to diagnose relay fusion and, more specifically, relates to a device and a method to diagnose relay fusion, capable of diagnosing whether fusion in a relay is generated or not based on a magnetic field generated in the relay. The present invention includes: a magnetic sensing part sensing a magnetic field generated in a relay; and a fusion diagnosis part diagnosing whether fusion in the relay is generated or not.

Description

[0001] APPARATUS AND METHOD FOR DIAGNOSIS RELAY WELDING [0002]

The present invention relates to an apparatus and method for diagnosing a relay fusion, and more particularly, to a relay fusion detection apparatus and method capable of diagnosing whether or not fusion has occurred in a relay based on a magnetic field generated inside a relay.

A relay is a switching device that operates when an input reaches a certain value to open or close another circuit. Relays can be interlocked with independent circuits and have the advantage of being able to turn on / off large current circuits due to the operation of low voltage systems such as 5V. In addition, since the coil portion and the contact portion in the relay are insulated and separated, they can be electrically isolated from external devices. Because of this advantage, relays are being used as switching elements in various fields where on / off switching is required.

In general, when an abnormal current flows through an electric circuit, the relay performs an on / off operation based on the control signal, thereby preventing the load from being damaged from the abnormal current.

However, when the relay is not operated due to the welding of the relay, if an abnormal current such as a high current flows on the electric circuit, the abnormal current can not be blocked and the load may be damaged.

In order to improve this, conventionally, a device capable of diagnosing whether or not the fusion of the relay has occurred is used, and when the fusion is diagnosed, the relay is replaced to prevent this problem from occurring in advance.

However, in the conventional relay welding diagnosis apparatus, it is possible to diagnose only whether the relay is in a normal state or a state in which the relay is completely welded, and there is a problem that it is not possible to diagnose whether or not partial fusion occurs in the relay.

In order to solve the problems of the conventional relay fusion diagnosis apparatus, the present inventors have developed a method for detecting the intensity and direction of a magnetic field generated in a relay inner coil and diagnosing whether or not the magnetic field is non-uniform based on the strength and direction of the sensed magnetic field And has developed a relay welding diagnosis apparatus and method capable of diagnosing whether or not partial fusion has occurred in a relay based on whether the magnetic field is uneven or not.

Korean Patent Publication No. 10-2013-0119666

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a method for sensing a strength of a magnetic field and a direction of a magnetic field generated in an internal coil of a relay, And to provide a relay welding diagnosis device and method capable of diagnosing whether fusion has occurred in a relay based on whether the magnetic field is uneven or not.

Further, the present invention provides a relay welding diagnosis device and method capable of calculating the degree of unevenness of a magnetic field in a relay inner coil, and determining whether fusion occurring within a relay is partial fusion or complete fusion based on the calculated degree of nonuniformity .

A relay welding diagnosis apparatus according to an embodiment of the present invention includes a magnetic field sensing unit for sensing a magnetic field generated in a relay and a non-uniformity of the magnetic field based on the sensed magnetic field, And a fusion diagnosis unit for diagnosing whether fusion has occurred in the relay.

In one embodiment, the relay may be a mechanical relay comprising a chamber, at least one contactor, a coil, a shaft and at least one core.

In one embodiment, the magnetic field sensing unit may sense the direction of the magnetic field generated by the coil and the intensity of the magnetic field, and the fusion diagnosis unit may sense the direction of the magnetic field generated from the coil, based on the sensed direction of the magnetic field, It is possible to diagnose whether the generated magnetic field is uneven or not.

In one embodiment, the fusion diagnosis unit calculates an inductance value of the coil based on the sensed magnetic field, determines a degree of warpage of the shaft based on the calculated inductance value, So that it is possible to diagnose whether fusion has occurred in the relay.

In one embodiment, the fusion diagnosis unit analyzes electromagnetic interference (EMI) characteristics using the sensed magnetic field, and determines whether fusion occurs in the relay based on the analyzed EMI characteristics Can be diagnosed.

According to an embodiment of the present invention, there is provided a method of diagnosing a relay fusion, comprising the steps of sensing a magnetic field generated in a relay, diagnosing whether the magnetic field is non-uniform based on the sensed magnetic field, And diagnosing whether or not fusion occurs in the relay.

In one embodiment, the relay may be a mechanical relay comprising a chamber, at least one contactor, a coil, a shaft and at least one core.

In one embodiment, the sensing may include sensing a direction and a magnetic field strength of a magnetic field generated in the coil, wherein the diagnosing comprises sensing a direction of the magnetic field sensed and a magnitude of the magnetic field And diagnosing whether the magnetic field generated in the coil is non-uniform based on the magnetic field.

In one embodiment, the diagnosing step may include calculating an inductance value of the coil based on the sensed magnetic field, determining a degree of warpage of the shaft based on the calculated inductance value, And diagnosing whether fusion has occurred in the relay based on the diagnosis result.

In one embodiment, the diagnosing step may include analyzing electromagnetic interference (EMI) characteristics using the sensed magnetic field, determining whether fusion occurs within the relay based on the analyzed EMI characteristics The method comprising the steps of:

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a method for sensing a strength of a magnetic field and a direction of a magnetic field generated in an internal coil of a relay, And it is possible to diagnose whether fusion occurs in the relay based on whether the magnetic field is uneven or not.

Further, the present invention is advantageous in that the degree of non-uniformity of the magnetic field in the relay inner coil can be calculated and it can be judged based on the calculated degree of nonuniformity whether the fusion occurring in the relay is partial fusion or complete fusion.

FIG. 1 is a view schematically showing components of a relay fusion diagnostic apparatus 100 according to an embodiment of the present invention.
FIG. 2 is a view illustrating an exemplary form of a relay 10 applicable to a relay fusion detection apparatus 100 according to an embodiment of the present invention.
FIG. 3 is an exemplary view showing a case where fusion occurs in the relay 10 in the relay fusion detection apparatus 100 according to an embodiment of the present invention.
4 is a flowchart for explaining a series of processes for diagnosing fusion of a relay using a relay welding diagnosis apparatus 100 according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in order to facilitate understanding of the present invention. However, the following examples are provided only for the purpose of easier understanding of the present invention, and the present invention is not limited by the examples.

FIG. 1 is a view schematically showing the components of a relay welding diagnosis apparatus 100 according to an embodiment of the present invention. FIG. 2 is a schematic view of a relay welding diagnosis apparatus 100 according to an embodiment of the present invention. FIG. 3 is a diagram illustrating an example of a relay fusion detection apparatus 100 according to an embodiment of the present invention. In FIG. 3, Fig.

1 to 3, the relay fusion detection apparatus 100 according to an exemplary embodiment of the present invention may include a magnetic field sensing unit 110 and a fusion diagnosis unit 120.

The relay fusion detection apparatus 100 according to an embodiment of the present invention shown in FIGS. 1 to 3 is in accordance with one embodiment, and the components thereof are not limited to the embodiments shown in FIGS. 1 to 3, May be added, changed or deleted in accordance with For example, the relay fusion detection apparatus 100 'according to another embodiment of the present invention may include a magnetic sensor 110 and a fusion diagnosis unit 120 as separate components, It is possible to detect the magnetic field and diagnose the fusion.

First, the magnetic field sensing unit 110 can sense a magnetic field generated in the relay 10. For example, the magnetic field sensing unit 110 may include at least one magnetic sensor. The magnetic field sensing unit 110 may be configured to detect and measure a magnetic energy, which is a current generated in a wire by an electromagnetic induction phenomenon, a method using a Hall effect , A method using a magnetoresistive effect, and a search coil method can be used to sense a magnetic field generated inside the relay 10. However, the present invention is not limited thereto, and any method capable of detecting and detecting a magnetic field can be applied.

2, the relays 10 to be diagnosed by the relay fusion diagnostic apparatus 100 according to an embodiment of the present invention include a chamber 11, at least one contactor 12, A coil 13, a shaft 14, and one or more cores 15a and 15b.

The magnetic field sensing unit 110 may sense the direction of the magnetic field and the intensity of the magnetic field generated in the coil 13 located inside the relay 10 using any one or more of the magnetic field sensing methods described above, Direction and intensity of the magnetic field to the fusion-bonding diagnosis unit 120 described later.

The fusion diagnosis unit 120 can diagnose whether the magnetic field generated inside the relay 10 is nonuniform based on the magnetic field sensed by the magnetic field sensing unit 110, 10 can be diagnosed as to whether or not fusion welding has occurred.

In one embodiment, the fusion diagnosis unit 120 can diagnose whether the magnetic field generated in the coil 13 is nonuniform based on the direction of the magnetic field and the intensity of the magnetic field. 3, when the partial fusion occurs in the contactor 12 of the relay 10 in the steady state, the shaft 14 contained in the relay 10 is bent in the direction in which the shaft 14 is fused A phenomenon may occur. The arrangement of the shaft 14 in the coil 13 is changed due to the bowing of the shaft 14 and the inductance of the coil 13 changes accordingly. Such inductance changes the distribution of the magnetic field and changes the intensity and direction of the magnetic field to make the magnetic field nonuniform.

The fusion diagnosis unit 120 can sense a change in intensity and direction of a magnetic field and can diagnose a non-uniformity of the magnetic field. For example, the fusion diagnosis unit 120 may detect a change in intensity and direction of a magnetic field, and compare the shape of the sensed magnetic field with the shape of a reference magnetic field to diagnose nonuniformity.

Here, the shape of the reference magnetic field may be in the form of a magnetic field generated in the coil 13 included in the relay 10 in a steady state in which partial fusion and complete fusion are not generated within the relay 10. For example, the fusion diagnosis unit 120 stores reference magnetic field information including information on the direction and intensity of a magnetic field when the relay 10 is in a steady state in which no fusion occurs, When a change in the shape of the magnetic field is detected, the non-uniformity of the magnetic field can be diagnosed by comparison with the reference magnetic field information.

In one embodiment, the fusion diagnosis unit 120 can diagnose the degree of magnetic field nonuniformity by comparing the shape of the sensed magnetic field with the shape of the reference magnetic field. For example, when fusion occurs in a pair of contactors 12 provided inside the relay 10, the degree of non-uniformity of the magnetic field may be different depending on the degree of fusion. More specifically, when partial fusion occurs on one side of one of the pair of contactors 12 provided in the relay 10, one of the pair of contactors 12 In the case where the texter 12 is partially fused and the pair of contactors 12 are both fused, the extent to which they are welded is different, and accordingly, the degree to which the shaft 14 is bent also differs. The degree of unevenness of the magnetic field also becomes different as the degree of bending varies. Accordingly, the fusion diagnosis unit 120 can diagnose the degree of non-uniformity of the magnetic field by comparing the degree of non-uniformity of the sensed magnetic field with the predetermined reference magnetic field.

The fusion diagnosis unit 120 can calculate the inductance value of the coil 13 based on the magnetic field sensed by the magnetic field sensing unit 110 and calculate the inductance value of the shaft 14 based on the calculated inductance value. Can be determined. For example, the fusion diagnosis unit 120 may match the degree of warpage of the shaft 14 with the inductance value, and store the data table in a data table. The fusion diagnosis unit 120 calculates the inductance value of the coil 13 based on the magnetic field sensed by the magnetic field sensing unit 110 and calculates the degree of warpage of the shaft 14 matched with the inductance value calculated in the data table You can choose.

The fusion diagnosis unit 120 can diagnose whether or not partial fusion occurs in the relay 10 by comparing the degree of warping of the selected shaft 14 with a reference value.

In one embodiment, the fusion diagnosis unit 120 can analyze electromagnetic interference (EMI) characteristics based on the magnetic field sensed by the magnetic field sensing unit 110, and based on the analyzed EMI characteristics, It is possible to diagnose whether or not fusion bonding has occurred in the inside of the wafer 10.

EMI may be a phenomenon that obstructs other electronic apparatuses due to noise generated in the electronic apparatuses, that is, a phenomenon that obstructs the functions of other electronic apparatuses.

For example, when partial fusion occurs in the contactor 12 of the relay 10 in the steady state as shown in FIG. 3, the shaft 14 contained in the relay 10 is bent in the direction of fusion The strength and direction of the magnetic field inside the coil 130 change. If the intensity and direction of the magnetic field inside the relay 10 change, an unnecessary magnetic field is applied to other adjacent electronic devices due to the change of the magnetic field, thereby causing a failure or malfunction of the function.

The fusion diagnosis unit 120 can acquire status information from other adjacent electronic devices and can confirm whether a failure, a failure, an error, or an abnormal current event has occurred in adjacent electronic devices according to a change in the magnetic field. Accordingly, the fusion diagnosis unit 120 can analyze the EMI characteristics and diagnose whether the partial fusion or the complete fusion has occurred in the relay 10 through the analyzed EMI characteristics.

In one embodiment, the fusion diagnosis unit 120 uses one or more of a method of using a magnetic field nonuniformity, a method of determining a degree of warpage of the shaft 14 using an inductance value, and a method of analyzing an EMI characteristic It is possible to diagnose whether or not fusion welding has occurred in the relay 10. [ For example, the fusion diagnosis unit 120 may monitor whether a change in the magnetic field occurs in the relay 10 through a method of analyzing EMI characteristics. At this time, when a malfunction or an abnormality occurs in the peripheral electronic devices, the fusion diagnosis unit 120 diagnoses whether or not the magnetic field generated in the relay 10 is nonuniform by using the method of using the non-uniformity of the magnetic field . When the magnetic field generated inside the relay 10 is diagnosed to be non-uniform, the fusion diagnosis unit 120 determines the degree of bending of the shaft 14 using the inductance value, It is possible to determine whether it is partially welded or completely welded. Hereinafter, with reference to FIG. 4, a method of diagnosing a relay fusion using the relay fusion detection device 100 according to an embodiment of the present invention will be described.

4 is a flowchart for explaining a series of processes for diagnosing fusion of a relay using a relay welding diagnosis apparatus 100 according to an embodiment of the present invention.

Referring to FIG. 4, the magnetic field inside the relay is sensed (S110). In step S110, whether or not the top field is non-uniform is diagnosed based on the strength and direction of the sensed magnetic field (S120).

Here, if the magnetic field is not uneven and is uniform, the process returns to step S110 to repeat the process of sensing the magnetic field inside the relay. However, in the case where the magnetic field is uneven, the degree of unevenness of the magnetic field generated inside the relay is measured (S130), and the degree of fusion within the relay is diagnosed based on the unevenness of the measured magnetic field (S140).

In the steps S120 and S130, it is described that the magnetic field is nonuniform and the degree of fusion is diagnosed according to the degree of nonuniformity. However, the present invention is not limited thereto, and a method of using the inductance value and a method of analyzing EMI characteristics Any method capable of diagnosing fusion can be applied.

The above-described relay fusion welding diagnosis method has been described with reference to the flowcharts shown in the drawings. While the above method has been shown and described as a series of blocks for purposes of simplicity, it is to be understood that the invention is not limited to the order of the blocks, and that some blocks may be present in different orders and in different orders from that shown and described herein And various other branches, flow paths, and sequences of blocks that achieve the same or similar results may be implemented. Also, not all illustrated blocks may be required for implementation of the methods described herein.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims It can be understood that

10: Relay
110: magnetic field sensing unit
120:

Claims (10)

A magnetic field sensing unit for sensing a magnetic field generated in the relay; And
And a fusion diagnosis unit for diagnosing whether or not the magnetic field is non-uniform based on the sensed magnetic field, and for diagnosing whether fusion has occurred in the relay based on whether the magnetic field is non-uniform or not.
Relay welding diagnosis device.
The method according to claim 1,
The relay includes:
Characterized in that it is a mechanical relay comprising a chamber, a chamber, at least one contactor, a coil, a shaft and at least one core,
Relay welding diagnosis device.
3. The method of claim 2,
The magnetic field sensing unit includes:
Sensing the direction of the magnetic field generated by the coil and the intensity of the magnetic field,
Wherein the fusion diagnosis unit comprises:
And diagnoses whether the magnetic field generated in the coil is nonuniform based on the direction of the sensed magnetic field and the intensity of the magnetic field.
Relay welding diagnosis device.
3. The method of claim 2,
Wherein the fusion diagnosis unit comprises:
Calculating an inductance value of the coil based on the sensed magnetic field, determining a degree of warpage of the shaft based on the calculated inductance value, determining whether fusion occurs in the relay based on the determined degree of warpage The method comprising:
Relay welding diagnosis device.
The method according to claim 1,
Wherein the fusion diagnosis unit comprises:
Wherein the controller is configured to analyze electromagnetic interference (EMI) characteristics using the sensed magnetic field and to diagnose whether fusion occurs in the relay based on the analyzed EMI characteristics.
Relay welding diagnosis device.
Sensing a magnetic field generated within the relay; And
Diagnosing whether or not the magnetic field is non-uniform based on the sensed magnetic field, and diagnosing whether fusion occurs in the relay based on whether the magnetic field is non-uniform or not.
Relay fusion diagnosis method.
The method according to claim 6,
The relay includes:
Characterized in that it is a mechanical relay comprising a chamber, a chamber, at least one contactor, a coil, a shaft and at least one core,
Relay fusion diagnosis method.
8. The method of claim 7,
Wherein the sensing comprises:
Sensing a direction of a magnetic field generated in the coil and an intensity of a magnetic field,
Wherein the diagnosing comprises:
And diagnosing whether the magnetic field generated in the coil is non-uniform based on the sensed direction of the magnetic field and the intensity of the magnetic field.
Relay fusion diagnosis method.
8. The method of claim 7,
Wherein the diagnosing comprises:
Calculating an inductance value of the coil based on the sensed magnetic field, determining a degree of warpage of the shaft based on the calculated inductance value, determining whether fusion occurs in the relay based on the determined degree of warpage The method comprising the steps < RTI ID = 0.0 > of: <
Relay fusion diagnosis method.
The method according to claim 6,
Wherein the diagnosing comprises:
Analyzing electromagnetic interference (EMI) characteristics using the sensed magnetic field, and diagnosing whether fusion has occurred in the relay based on the analyzed EMI characteristics. doing,
Relay fusion diagnosis method.

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