KR101817519B1 - Solenoid check apparatus and check method thereof - Google Patents

Abstract

Disclosed are a solenoid inspection apparatus and an inspection method thereof. The solenoid inspection apparatus according to an embodiment of the present invention comprises: a first current measurement unit measuring a value of first current flowing at one end of a solenoid when the solenoid receives operating current from a driving unit receiving power to be driven; a first current detection unit detecting the value of the first current when the measured value of the first current is greater than a value of first detection current set for detection; a second current measurement unit measuring a value of second current flowing at the other end of the solenoid; a second current detection unit detecting the value of the second current if the measured value of the second current is greater than a value of second detection current set for detection; and a current determination unit comparing the detected value of the first current and the detected value of the second current with a value of first inspection current set for inspection and a value of second inspection current set for inspection to determine a current supply state of the solenoid. The present invention can reduce maintenance costs and enhance production yield rate.

Description

SOLENOID CHECK APPARATUS AND CHECK METHOD Technical Field [1]

The present invention relates to a solenoid inspection apparatus and a method for inspecting the same.

In general, a conventional solenoid was a device for generating mechanical motion by pulling a plunger into a coil when a current was supplied to the coil.

A conventional method for determining the failure state of a solenoid detects a current value flowing through the solenoid to determine a failure state of the solenoid.

For example, as described in Korean Patent Laid-Open Publication No. Hei 10-2006-0031241 (April 04, 2006), a drive current value flowing through a solenoid is detected, and a target PWM duty value for controlling the detected drive current value to a target current value A fault diagnosis method of a proportional solenoid driving apparatus capable of judging a fault state of a solenoid driving apparatus is disclosed.

However, the conventional fault diagnosis method of the proportional solenoid driving apparatus has a limitation in accurately determining the current supply state of the solenoid.

Since the conventional fault diagnosis method of the proportional solenoid driving apparatus has a limitation in shortening the maintenance time during maintenance, there is a limit in suppressing an increase in the maintenance cost, and in order to shorten the manufacturing time in the manufacturing process There was a limit to improving the production yield.

Therefore, in recent years, an improved solenoid inspection apparatus and its inspection method for improving the production yield while suppressing an increase in maintenance cost have been continuously studied.

Korean Patent Publication No. 10-2006-0031241 (Apr. 12, 2006)

An embodiment of the present invention is intended to provide a solenoid inspection apparatus and an inspection method thereof that can suppress an increase in maintenance cost.

Further, an embodiment of the present invention is intended to provide a solenoid inspection apparatus and its inspection method capable of improving the production yield.

According to an aspect of the present invention, there is provided a plasma display apparatus comprising: a first current measuring unit configured to measure a first current flowing through one end of a solenoid when an operating current is supplied from a solenoid, A first current detector for detecting a first current value when the measured first current value is greater than a first detected current value set for detection; A second current measuring unit for measuring a second current value flowing at the other end of the solenoid; A second current detector for detecting a second current value if the measured second current value is greater than a second detected current value set for detection; And a current determination unit for determining a current supply state of the solenoid by comparing the detected first current value and the detected second current value with a first inspection current value and a second inspection current value set for inspection.

At this time, the first current measuring unit may include a first shunt resistor.

In addition, the first current detector may include a first OP AMP (Operational Amplifier).

Further, the second current measuring unit may include a second shunt resistor.

Also, the second current detector may include a second OP AMP (Operational Amplifier).

The current determination unit may be provided in an ECU (Electronic Control Unit) or an MCU (Micro Control Unit).

Also, the power source may be a battery voltage.

The current supply state of the solenoid may be at least one of a solenoid open state, a short state in which one end of the solenoid is connected to the ground, a short state in which the power source is connected to the other end of the solenoid, and a normal state of the solenoid.

The controller may further include an identification unit for identifying a current solenoid current supply status according to a current supply status of the solenoid.

The identification unit may include a light emitting diode that emits current solenoid current supply states in different colors according to a current supply state of the solenoid.

In addition, the identification unit may include a solenoid open state corresponding to the current solenoid current supply state, a short state where one end of the solenoid is connected to the ground, a short state where the power is connected to the other end of the solenoid, At least one of the solenoid steady state can be identified.

In addition, the identification unit may include a solenoid open state corresponding to the current solenoid current supply state, a short state where one end of the solenoid is connected to the ground, a short state where the power is connected to the other end of the solenoid, And a light emitting diode that emits at least one of the solenoid steady states in different colors.

According to another aspect of the present invention, a first current value flowing through one end of a solenoid is measured, and a second current value flowing through the other end of the solenoid is measured when receiving an operating current from a solenoid, A current measuring step; If the measured first current value is greater than the first detected current value set for detection, and if the measured second current value is greater than the second detected current value set for detection, the second current value is detected ; And a current judging step of judging a current supply state of the solenoid by comparing the detected first current value and the detected second current value with a first inspection current value and a second inspection current value set for inspection.

The solenoid inspection apparatus and the inspection method thereof according to the embodiment of the present invention can suppress an increase in maintenance cost.

Further, the solenoid inspection apparatus and inspection method thereof according to the embodiment of the present invention can improve the production yield.

1 is a block diagram showing a state where a solenoid testing apparatus according to an embodiment of the present invention is connected to a power source, a driving unit, and a solenoid.
Fig. 2 is a block diagram showing an example of the solenoid testing apparatus shown in Fig. 1. Fig.
3 is a circuit diagram showing an example in which the solenoid testing apparatus shown in FIG. 2 is electrically connected to a power source, a driving unit, and a solenoid.
FIG. 4 is a table for illustrating a process of determining a current supply state of a solenoid in the current determination unit shown in FIG. 2;
5 is a flowchart illustrating an example of a solenoid inspection method of a solenoid inspection apparatus according to an embodiment of the present invention.
6 is a flowchart showing an example of the current determination step shown in Fig.
7 is a block diagram showing another example of a solenoid testing apparatus according to an embodiment of the present invention.
8 is a circuit diagram showing an example in which the solenoid testing apparatus shown in FIG. 7 is electrically connected to a power source, a driving unit, and a solenoid;
9 is a flowchart showing another example of a solenoid inspecting method of a solenoid inspecting apparatus according to an embodiment of the present invention.
10 is a flowchart showing an example of the current judging step and the discriminating step shown in Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are provided to fully convey the spirit of the present invention to a person having ordinary skill in the art to which the present invention belongs. The present invention is not limited to the embodiments shown herein but may be embodied in other forms. For the sake of clarity, the drawings are not drawn to scale, and the size of the elements may be slightly exaggerated to facilitate understanding.

FIG. 1 is a block diagram illustrating a solenoid testing apparatus according to an exemplary embodiment of the present invention connected to a power source, a driving unit, and a solenoid. FIG. 2 is a block diagram illustrating the solenoid testing apparatus shown in FIG.

FIG. 3 is a circuit diagram illustrating a state in which the solenoid testing apparatus shown in FIG. 2 is electrically connected to a power source, a driving unit, and a solenoid.

FIG. 4 is a table for illustrating a process of determining a current supply state of a solenoid in the current determination unit shown in FIG. 2. FIG.

1 to 3, a solenoid testing apparatus 100 according to an embodiment of the present invention includes a first current measuring unit 102, a first current detecting unit 104, a second current measuring unit 106, A second current detection unit 108 and a current determination unit 110.

The first current measuring unit 102 measures a first current flowing through one end of the solenoid 50 when the operating current is supplied from the solenoid 50 from the driving unit 30 that receives and drives the power supply 10 .

At this time, the power source 10 may be the battery voltage BV, the battery voltage BV may be 12V, and one end of the solenoid 50 may be a positive number of the solenoid 50.

Here, the first current measuring unit 102 may include a first shunt resistor SR1, and the driving unit 30 may include a first driving unit 30a and a second driving unit 30b.

The first driver 30a may be an HSD (high side driver) operating with high power supply and the second driver 30b may be a low side driver (LSD) operating with low power.

For example, one end of the first shunt resistor SR1 may be electrically connected to one end of the first driver 30a connected to the power source SV and one end of the first current detector 104 to be described later, The other end of the first current detection unit SR1 may be electrically connected to the other end of the first current detection unit 104 and one end of the solenoid S. [

The first current detection unit 104 detects the first current value when the first current value measured by the first current measurement unit 102 is larger than the first detection current value set for detection.

At this time, the first current detector 104 may include a first OP AMP (Operational Amplifier) OP AMP1.

For example, the first stage of the first OP AMP (OP AMP1) may be electrically connected to one end of the first current measuring unit 102, and the second stage of the first OP AMP (OP AMP1) And the third end of the first OP AMP (OP AMP1) may be electrically connected to the current determination unit 110 to be described later.

The second current measuring unit 106 measures a second current value flowing at the other end of the solenoid 50. [

At this time, the second current measuring unit 106 may include the second shunt resistor SR2, and the other end of the solenoid 50 may be a negative number of the solenoid 50.

For example, one end of the second shunt resistor SR2 may be electrically connected to the other end of the solenoid S and one end of the second current detecting portion 108 to be described later, and the other end of the second shunt resistor SR2 And may be electrically connected to the other end of the second current detection unit 108 and the second driving unit 30b connected to the ground.

The second current detection unit 108 detects the second current value when the second current value measured by the second current measurement unit 106 is larger than the second detection current value set for detection.

At this time, the second current detector 108 may include a second OP AMP (Operational Amplifier) (OP AMP2).

For example, the first end of the second OP AMP (OP AMP2) may be electrically connected to the other end of the solenoid S and one end of the second current measuring unit 106, and the second end of the OP AMP (OP AMP2) The second stage may be electrically connected to the other end of the second current measuring unit 106 and the second driving unit 30b connected to the ground. The third stage of the second OP AMP (OP AMP2) may be electrically connected to the current determining unit 110, respectively.

The current determination unit 110 determines the first current value detected by the first current detection unit 104 and the second current value detected by the second current detection unit 108 based on the first inspection current value set for inspection and the second inspection current value 2 test current value to judge the current supply state of the solenoid 50. [

At this time, the current supply state of the solenoid 50 is a state in which the solenoid S is open, one end of the solenoid S is short-circuited to the ground, the power SV is connected to the solenoid S Short state, and a solenoid (S) normal state.

For example, as shown in FIG. 4, the current determination unit 110 determines that the first current value detected by the first current detection unit 104 is smaller than the set first inspection current value range, It is possible to determine that the current supply state of the solenoid 50 is the solenoid S open state, if it is determined that the second current value detected by the solenoid 50 is smaller than the set second inspection current value range.

4, the current determining unit 110 determines that the first current value detected by the first current detecting unit 104 is larger than the set first inspection current value range, and the second current detecting unit The current supply state of the solenoid 50 is determined to be a short state in which one end of the solenoid S is connected to the ground, if it is determined that the second current value detected by the solenoid 50 is smaller than the set second inspection current value range There is a number.

4, the current determining unit 110 determines that the first current value detected by the first current detecting unit 104 is larger than the set first inspection current value range, and the second current detecting unit The current supply state of the solenoid 50 is set to a short state connected to the other end of the solenoid S when the second current value detected by the solenoid S 108 is larger than the set second inspection current value range .

4, the current determination unit 110 determines that the first current value detected by the first current detection unit 104 is within the first set current value range, and the second current detection unit The current supply state of the solenoid 50 can be determined as the normal state of the solenoid S if it is determined that the second current value detected by the solenoid 50 is within the set second inspection current value range.

Here, although not shown, the current determination unit 110 may be provided in an ECU (Electronic Control Unit) (not shown) or an MCU (Micro Control Unit) (not shown).

A solenoid inspection method for inspecting the current state of the solenoid 50 using the solenoid inspecting apparatus 100 according to an embodiment of the present invention will be described with reference to FIGS. 5 and 6. FIG.

FIG. 5 is a flowchart illustrating an example of a method for inspecting a solenoid of a solenoid testing apparatus according to an embodiment of the present invention, and FIG. 6 is a flowchart illustrating an example of a current determining step shown in FIG.

5 and 6, a solenoid inspection method 500 of a solenoid inspection apparatus (100 of FIG. 2) according to an embodiment of the present invention includes a current measurement step S502, a current detection step S504, Step S506.

First, the current measuring step S502 is a step of measuring a current flowing through a solenoid (50 in Fig. 2) when receiving an operating current from a solenoid (50 in Fig. 1) 2) is measured by a first current measuring unit (102 in Fig. 2) and a second current value flowing at the other end of the solenoid (50 in Fig. 2) is measured by a second current measuring unit 106).

Thereafter, the current detection step S504 is performed so that the first current value measured by the first current measurement unit 102 (see FIG. 2) is the first detected current value set in the first current detection unit (104 in FIG. 2) 2), the first current value is detected by the first current detector (104 in FIG. 2), and the second current value measured by the second current detector (106 in FIG. 2) 2), the second current value is detected by the second current detector (108 in Fig. 2).

Thereafter, the current judging step S506 checks the first current value detected by the first current detecting section 104 (Fig. 2) and the second current value detected by the second current detecting section 108 (Fig. 2) 2) is compared with the first inspection current value and the second inspection current value set in the fault current determination unit 110 (FIG. 2), and the current determination unit 110 of FIG. 2 determines the current supply state of the solenoid .

At this time, the current supply state of the solenoid (50 in Fig. 2) is a state in which the solenoid (S in Fig. 3) is open, one end of the solenoid (S in Fig. 3) SV) may be at least one of a short state connected to the solenoid (S in Fig. 3) and a solenoid (S in Fig. 3) steady state.

For example, as shown in FIG. 6, the current judging step S506 is a step of judging whether or not the first current value detected by the first current detecting section 104 (FIG. 2) and the first current value detected by the second current detecting section The second current value may be input to the current determination unit 110 (S506a).

Thereafter, the current judgment step S506 is performed such that the first current value detected by the first current detection section 104 (Fig. 2) is smaller than the first inspection current value range set in the current judgment section 110 2), and the second current value detected by the second current detector (108 in Fig. 2) is smaller than the second inspection current value range set in the current determiner (110 in Fig. 2) 2) of the solenoid (S in Fig. 3) is set to a solenoid (S in Fig. 3) in the current judging unit (110 in Fig. 2) It can be judged as an open state (S506c).

On the other hand, in the current judgment step S506, the first current value detected by the first current detection part 104 in FIG. 2 in the current judgment part 110 in FIG. 2 is set in the current judgment part 110 in FIG. 2), and the second current value detected by the second current detector (108 in FIG. 2) is determined to be larger than the first inspection current value range by the current determination unit 110 (FIG. 2) 2) of the solenoid (50 in Fig. 3) is determined to be smaller than the second inspection current value range set in the solenoid (110 in Fig. 2) (S506d) (S in Fig. 3) can be determined as a short state in which one end is connected to the ground (S506e).

On the other hand, in the current judgment step S506, the first current value detected by the first current detection part 104 in FIG. 2 in the current judgment part 110 in FIG. 2 is set in the current judgment part 110 in FIG. 2), and the second current value detected by the second current detector (108 in FIG. 2) is determined to be larger than the first inspection current value range by the current determination unit 110 (FIG. 2) 2) of the solenoid (50 in Fig. 3) is determined to be larger than the second inspection current value range set in the power source determination unit (110 in Fig. 2) (S506f) (SV in FIG. 3) can be determined as a short state connected to the other end of the solenoid (S in FIG. 3) (S506g).

On the other hand, in the current judgment step S506, the first current value detected by the first current detection part 104 in FIG. 2 in the current judgment part 110 in FIG. 2 is set in the current judgment part 110 in FIG. 2), and the second current value detected by the second current detector (108 in FIG. 2) is determined to be within the first inspection current value range by the current determination unit 110 (FIG. 2) 2) of the solenoid (50 in Fig. 3) in the current determination unit (110 in Fig. 2) to the solenoid (50 in Fig. 3) (S in Fig. 3) can be determined as a normal state (S506i).

FIG. 7 is a block diagram showing another embodiment of a solenoid testing apparatus according to an embodiment of the present invention. FIG. 8 illustrates an example in which the solenoid testing apparatus shown in FIG. 7 is electrically connected to a power source, a driving unit, and a solenoid Circuit diagram.

7 and 8, a solenoid testing apparatus 700 according to an exemplary embodiment of the present invention includes a first current measuring unit 702 and a first current detecting unit 702, similar to the solenoid testing apparatus 100 (FIG. 2) 704, a second current measuring unit 706, a second current detecting unit 708, and a current determining unit 710.

The functions of the components of the solenoid testing apparatus 700 according to an embodiment of the present invention and the organic connections between them are the same as those of the components of the solenoid testing apparatus 100 And the same is the same as the organic connection relationship therebetween, so that respective further explanations thereof will be omitted below.

Here, the solenoid testing apparatus 700 according to an embodiment of the present invention may further include an identification unit 712.

That is, the identification unit 712 can identify the current solenoid current supply status according to the current supply status of the solenoid 50. [

The identification unit 712 determines whether the solenoid S is in the open state corresponding to the current solenoid current supply state or the short state in which one end of the solenoid S is connected to the ground according to the current supply state of the solenoid 50, , The power source SV can identify at least one of a short state connected to the other end of the solenoid (S) and a normal state of the solenoid (S).

At this time, one end of the identification unit 712 may be electrically connected to the current determination unit 710, and the other end of the identification unit 712 may be connected to the ground.

For example, the identification unit 712 may include a light emitting diode (LD) that emits current solenoid current supply states in different colors according to the current supply state of the solenoid 50 determined by the current determination unit 710.

At this time, the identification unit 712 determines whether the solenoid S is in the open state corresponding to the current solenoid current supply state according to the current supply state of the solenoid 50, the short state in which one end of the solenoid S is connected to the ground And a light emitting diode LD for emitting at least one of a short state in which the power source SV is connected to the other end of the solenoid S and a normal state of the solenoid S in different colors.

For example, the light emitting diode LD can emit yellow light when the solenoid S is open and can emit orange light when the one end of the solenoid S is short connected to the ground, It is possible to emit red light when the voltage SV is in a short state connected to the other end of the solenoid S and to emit green light when the solenoid S is in a normal state.

A solenoid inspecting method for inspecting the current state of the solenoid 50 using the solenoid inspecting apparatus 700 according to an embodiment of the present invention will be described with reference to FIGS. 9 and 10. FIG.

FIG. 9 is a flow chart showing another example of a solenoid inspecting method of a solenoid inspecting apparatus according to an embodiment of the present invention, and FIG. 10 is a flowchart showing an example of a current determining step and an identifying step shown in FIG.

9 and 10, the solenoid inspecting method 900 of the solenoid inspecting apparatus (700 of FIG. 7) according to the embodiment of the present invention includes a solenoid inspecting method (refer to FIG. 5) of the solenoid inspecting apparatus The current detection step S902, the current detection step S904, and the current determination step S906, in the same manner as the method 500 of FIG.

The functions of the solenoid inspecting method 900 of the solenoid inspecting apparatus (700 of FIG. 7) according to an embodiment of the present invention and the organic connection relation between the solenoid inspecting apparatuses 900 100) of the solenoid inspection method (500 in FIG. 5), and the organic connection relation between them, each of which will be omitted below.

Here, the solenoid inspection method 900 of the solenoid inspection apparatus (700 of FIG. 7) according to an embodiment of the present invention may further include an identification step (S908).

That is, the identifying step S908 may be performed after the current judging step S906.

Here, in the identification step S908, the current solenoid current supply status can be identified in the identification portion (712 in Fig. 7) according to the current supply status of the solenoid (50 in Fig. 7).

9 and 10, in the identification step S908, the solenoid (S in FIG. 8) corresponding to the current solenoid current supply state is opened according to the current supply state of the solenoid (50 in FIG. 8) A short state in which one end of the solenoid (S in Fig. 8) is connected to the ground, a short state in which the power source (SV in Fig. 8) is connected to the other end of the solenoid (S in Fig. 8), a solenoid ) At least one of the steady states can be identified in the identification portion (712 in Fig. 8) (S908a to S908d).

For example, in the identifying step S908, the current solenoid current supply status is determined based on the current supply status of the solenoid (50 in FIG. 8) determined in the current determination unit (710 in FIG. 8) (LD in Fig. 8) can emit light of different colors.

At this time, in the identification step S908, the solenoid (S in Fig. 8) open state corresponding to the current solenoid current supply state, the solenoid (S in Fig. 8) 8) of at least one of a solenoid (S in Fig. 8) shorted state and a solenoid (S in Fig. 8) 8) of the light emitting diodes (712 in FIG. 8).

8) can emit yellow light when the solenoid (S in FIG. 8) is open, and a short state (S) in which one end of the solenoid (S in FIG. 8) 8). If the power source (SV in Fig. 8) is in a short state connected to the other end of the solenoid (S in Fig. 8), it can emit red light. If the solenoid .

The solenoid inspecting apparatuses 100 and 700 and the inspecting methods 500 and 900 according to an embodiment of the present invention can determine the current supply state of the solenoid 50 provided in a vehicle have.

The solenoid inspecting apparatuses 100 and 700 and the inspecting methods 500 and 900 according to an embodiment of the present invention may include a first current measuring unit 102 and 702 and a first current detecting unit 104 and 704, (S502, S902), a current detection step (S504, S904), and a current detection step (S502, S904) including the second current measurement units (106, 706), the second current detection units The current determination step (S506, S906) is performed.

Therefore, the solenoid inspecting apparatuses 100 and 700 and the inspecting methods 500 and 900 according to the embodiment of the present invention can accurately determine the current supply state of the solenoid 50. [

Accordingly, the solenoid inspection apparatuses 100 and 700 and the inspection methods 500 and 900 according to the embodiment of the present invention can shorten maintenance time during maintenance, And the production time can be shortened during the production process, so that the production yield can be improved.

In addition, the solenoid tester 700 and the inspection method 900 according to an embodiment of the present invention may further include an identification unit 712 to further perform the identification step S908.

Therefore, the solenoid testing apparatus 700 and the testing method 900 according to an embodiment of the present invention can identify the current solenoid current supply state according to the current supply state of the solenoid 50. [

Accordingly, the solenoid inspection apparatus 700 and the inspection method 900 according to the embodiment of the present invention can quickly recognize the current supply state of the solenoid current during maintenance, thereby shortening the maintenance time even more So that the increase in maintenance cost can be further suppressed.

Claims (13)

A first current measuring unit for measuring a first current flowing through one end of the solenoid when an operating current is supplied from a solenoid supplied from a driving unit driven by a power supply;
A first current detector for detecting the first current value when the measured first current value is greater than a first detected current value set for detection;
A second current measuring unit for measuring a second current value flowing at the other end of the solenoid;
A second current detector for detecting the second current value if the measured second current value is greater than a second detected current value set for detection; And
And comparing the detected first current value and the detected second current value with a first inspection current value and a second inspection current value set for inspection to determine whether the solenoid is in an open state or in a state where one end of the solenoid is connected to a ground A short state in which the power source is connected to the other end of the solenoid, and a current determination unit for determining a state of the solenoid in the short state. The method according to claim 1,
Wherein the first current measuring unit includes a first shunt resistor. The method according to claim 1,
Wherein the first current detector includes a first OP AMP (Operational Amplifier). The method according to claim 1,
Wherein the second current measuring unit includes a second shunt resistor. The method according to claim 1,
And the second current detector includes a second OP AMP (Operational Amplifier). The method according to claim 1,
Wherein the current determination unit is provided in an ECU (Electronic Control Unit) or an MCU (Micro Control Unit). The method according to claim 1,
Wherein the power source is a battery voltage. delete The method according to claim 1,
And an identification unit for identifying a current solenoid current supply status according to a current supply status of the solenoid. 10. The method of claim 9,
Wherein,
And a light emitting diode that emits the current solenoid current supply status in different colors according to a current supply status of the solenoid. 10. The method of claim 9,
Wherein,
A solenoid open state corresponding to the current solenoid current supply state according to the current supply state of the solenoid, a short state where one end of the solenoid is connected to the ground, a short state where the power supply is connected to the other solenoid, State of the solenoid. 11. The method of claim 10,
Wherein,
A solenoid open state corresponding to the current solenoid current supply state according to the current supply state of the solenoid, a short state where one end of the solenoid is connected to the ground, a short state where the power supply is connected to the other solenoid, Wherein the light emitting diode emits light of at least one of the states. A current measuring step of measuring a first current flowing in one end of the solenoid and a second current flowing in the other end of the solenoid when an operating current is supplied from a solenoid,
If the measured first current value is greater than a first detected current value set for detection, and if the measured second current value is greater than a second detected current value set for detection, A current detecting step of detecting a current value; And
And comparing the detected first current value and the detected second current value with a first inspection current value and a second inspection current value set for inspection to determine whether the solenoid is in an open state or in a state where one end of the solenoid is connected to a ground A short state in which the power source is connected to the other end of the solenoid, and a current determination step of determining a state of the solenoid in a short state.

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