KR101766234B1 - Electromagnetic Susceptibility Test Method and Apparatus - Google Patents

Electromagnetic Susceptibility Test Method and Apparatus Download PDF

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Publication number
KR101766234B1
KR101766234B1 KR1020150095686A KR20150095686A KR101766234B1 KR 101766234 B1 KR101766234 B1 KR 101766234B1 KR 1020150095686 A KR1020150095686 A KR 1020150095686A KR 20150095686 A KR20150095686 A KR 20150095686A KR 101766234 B1 KR101766234 B1 KR 101766234B1
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South Korea
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electromagnetic wave
test
intensity
test object
limit value
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KR1020150095686A
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Korean (ko)
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KR20170005540A (en
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장재웅
김태윤
장경덕
민병희
문귀원
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한국항공우주연구원
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/08—Measuring electromagnetic field characteristics
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing

Abstract

The present invention relates to an electromagnetic immunity test method and apparatus for testing the immunity of electromagnetic waves by applying electromagnetic waves to a test object, the method comprising: setting a test limit value; And controlling the variation of the intensity of the electromagnetic wave applied to the test object to vary according to the ratio of the intensity of the electromagnetic wave to the test object, The step of varying the strength of the test object varies depending on the ratio of the intensity of the electromagnetic wave applied to the test object from the point at which the electromagnetic wave is applied to the test object to the end point at which the electromagnetic wave corresponding to the test limit value is applied, Divided into a plurality of sections, and the ratio of the intensity of the electromagnetic wave applied to the test object Increment of the increase in strength of the electromagnetic wave applied to the test interval toward the target is controlled so that small. According to the present invention, it is possible to improve the test speed by controlling the increase of the intensity of the electromagnetic wave applied to the test object to vary according to the ratio of the intensity of the electromagnetic wave applied to the test object with respect to the test limit value, .

Description

[0001] Electromagnetic Susceptibility Test Method and Apparatus [

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic immunity test method and apparatus, and more particularly, to an electromagnetic immunity test method and apparatus capable of testing electromagnetic immunity.

BACKGROUND ART [0002] In general, many electric / electronic components are arranged close to each other in a communication apparatus or an electronic apparatus. Such a plurality of electric / electronic components emits a certain amount of electromagnetic waves during operation, thereby affecting other electric / electronic components.

This phenomenon is called ElectroMagnetic Interference (EMI). Electromagnetic interference reduces the overall performance of communication equipment and electronic equipment. In particular, moving objects such as airplanes and satellites must be designed to ensure normal operation even in an environment caused by electromagnetic interference since malfunctions lead to accidents.

Therefore, it is very important to test whether electrical / electronic components exposed to strong electromagnetic waves are operating normally.

Among these, the electromagnetic immunity test is a test for evaluating how well electric / electronic parts withstand electromagnetic waves from the outside, and it is possible to confirm whether the electric / electronic parts are normally operated by applying electromagnetic waves to the test object. In particular, conventionally, the intensity of the electromagnetic wave applied to the test object is increased to an equal amount (for example, 1 dB) at every constant step, and the immunity level of the test object is measured.

However, the conventional method has a problem that the test speed is slow because the intensity of the electromagnetic wave is always increased in an equal amount from the time when the electromagnetic wave is applied to the test object to the time when the measurement is completed.

In addition, since the precision control is not achieved when the test limit value is reached, there is a problem that the immunity level can be excessively injected.

As a result, the resistance of the electromagnetic wave can not be accurately measured.

Korean Unexamined Patent Application Publication No. 2001-0057735 (published on July 05, 2001)

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to improve the test speed by controlling the increase of the intensity of electromagnetic waves applied to a test object according to the ratio of intensity of electromagnetic waves applied to the test object with respect to the test limit value, And an electromagnetic immunity test method and apparatus capable of precisely controlling the electromagnetic wave immunity test.

Further, the present invention includes other objects that can be achieved from the construction of the present invention described later, in addition to the objects explicitly mentioned.

According to another aspect of the present invention, there is provided an electromagnetic immunity testing method for testing a resistance of an electromagnetic wave by applying electromagnetic waves to a test object, the method comprising: setting a test limit value; And controlling the increase of the intensity of the electromagnetic wave applied to the test subject to be varied according to the ratio of the intensity of the electromagnetic wave to be applied to the test subject, Wherein the step of controlling the increase of the intensity of the electromagnetic wave applied to the test object varies from the time when the electromagnetic wave is applied to the test object to the end point when the electromagnetic wave corresponding to the test limit value is applied to the test object, According to the ratio of the intensity of the electromagnetic wave applied to the object, Divided by the liver, increment of the strength of the electromagnetic wave toward the section in which the ratio of the intensity of the electromagnetic wave applied to the test subject increase applied to the test target may be so controlled small.

A computer-readable medium according to another embodiment of the present invention records a program for causing a computer to execute any one of the above methods.

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Meanwhile, the electromagnetic immunity testing apparatus for testing the immunity of an electromagnetic wave by applying electromagnetic waves to an object to be tested according to an embodiment of the present invention includes a setting unit for setting a test limit value, And a controller for controlling the increase of the intensity of the electromagnetic wave applied to the test object in accordance with the ratio of the intensity to the test object so that the increase of the intensity of the electromagnetic wave applied to the test object is varied. The test object is divided into a plurality of sections according to the ratio of the intensity of the electromagnetic wave to be applied to the test object until the end point where the electromagnetic wave applied to the test object is applied, It is possible to control the increase of the intensity of the electromagnetic wave to be reduced.

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As described above, according to the electromagnetic wave immunity test method and apparatus according to the embodiment of the present invention, the increase of the intensity of the electromagnetic wave applied to the test object varies according to the ratio of the intensity of the electromagnetic wave applied to the test object with respect to the test limit value, The speed can be remarkably improved.

In addition, since the precision can be controlled when the test limit is reached, there is an advantage that the electromagnetic wave can be prevented from being excessively injected into the test object.

Accordingly, there is an advantage that the reliability of the electromagnetic immunity test can be improved by accurately measuring the immunity of the electromagnetic wave.

On the other hand, the effects of the present invention are not limited to those described above, and other effects that can be derived from the constitution of the present invention described below are also included in the effects of the present invention.

1 is a configuration diagram of an electromagnetic wave immunity test apparatus according to an embodiment of the present invention.
2 is a flowchart illustrating an electromagnetic immunity test procedure according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention.

Fig. 1 shows a configuration diagram of an electromagnetic wave testing apparatus according to an embodiment of the present invention.

As shown in FIG. 1, the electromagnetic wave immunity test is a test for evaluating the resistance capability of the test object 50 against an external electromagnetic wave such as a processor-embedded device. The test items include electrostatic (ESD) (EFT), Surge, Conducted Resistance (CS), Power Frequency Magnetic Field Resistance (MF), Voltage Dips or Voltage Dips Variation / Interruptions.

The electromagnetic wave immunity test is a test requiring the performance of the test subject 50 in a poor electromagnetic environment so that a condition is required to form a uniform electric field in the area where the test subject 50 is placed, To assure effectiveness, an electromagnetic immunity test may be conducted in an electromagnetic anechoic chamber.

The electromagnetic wave immunity apparatus 100 includes an electromagnetic wave radiation unit 110 provided in the electromagnetic anechoic chamber for radiating electromagnetic waves, a setting unit 120 for setting various information for the electromagnetic wave immunity test, A controller 130 for adjusting the intensity of electromagnetic waves radiated from the electromagnetic wave radiating unit 110, and an electromagnetic wave receiving unit 140 for receiving the radiated electromagnetic waves.

The electromagnetic wave radiating part 110 can supply the electric power to which the electromagnetic wave (noise) is applied to the test object 50. [ The electromagnetic wave radiating unit 110 includes a power supply unit 112 for generating electric power and an electromagnetic wave applying unit 114 for applying electromagnetic waves to the electric power generated by the power supply unit 112 to supply electric power to the test object 50 . The electromagnetic wave radiating unit 110 includes a signal generator for generating a constant signal, a power amplifier for amplifying the generated signal by a predetermined magnitude of electric field intensity, or an electric power (hereinafter, referred to as " electromagnetic wave " An antenna for radiating electromagnetic waves to the test object 50, and the like. Here, since the configuration for radiating electromagnetic waves is a well-known technology, a detailed description thereof will be omitted.

Since the electromagnetic wave is radiated from the electromagnetic wave radiating part 110 and the emitted electromagnetic wave may affect the operation of the test object 50, the electromagnetic wave is irradiated to the test object 50 50) is operating normally to measure the immunity level of the test subject (50).

For this purpose, the setting unit 120 may set the test limit value first. The test limit value is a value at which the electromagnetic wave can be maximally allowed, for example, a value such as 100 V / m or the like.

The control unit 130 can control the increase of the intensity of the electromagnetic wave applied to the test object 50 to vary according to the ratio of the intensity of the electromagnetic wave applied to the test object 50 with respect to the test limit value set by the setting unit 120 have. For example, when the test limit value set in the setting unit 120 is 100 V / m, the controller 130 applies the intensity of the electromagnetic wave of 30 V / m or more to the test object 50 with respect to the test limit value (100 V / m) The intensity of the electromagnetic wave is controlled to increase by 3 dB at a rate of 30% or more, and the intensity of the electromagnetic wave is controlled to increase by 1 dB at a rate of 50% or more at which the intensity of the electromagnetic wave of 50 V / m or more is applied to the test object 50.

Thus, conventionally, regardless of the ratio of the intensity of the electromagnetic wave applied to the test object 50 with respect to the test limit value, the intensity of the electromagnetic wave is increased by a predetermined amount from the initial point to the end point at which the electromagnetic wave is applied to the test object 50 The level of immunity of the test object 50 is measured. However, in the embodiment of the present invention, it is possible to control the increase of the intensity of the electromagnetic wave appropriately according to the ratio of the intensity of the electromagnetic wave applied to the test object 50 with respect to the test limit value have.

The control unit 130 may control the increase of the intensity of the electromagnetic wave applied to the test object 50 to vary according to the interval of the intensity of the electromagnetic wave applied to the test object 50 with respect to the set test limit value.

More specifically, the control unit 130 determines whether the electromagnetic wave corresponding to the test limit value is applied from the initial point (0% rate) in which the electromagnetic wave applied to the test object 50 is 0 to the test object 50 Can be divided into a plurality of sections according to the ratio of the intensity of the electromagnetic wave to be applied to the test object 50 with respect to the test limit value so that the increase in the intensity of the electromagnetic wave applied to the test object 50 can be varied for each section . For example, the control unit 130 increases the intensity of the electromagnetic wave by 3 dB in the first section where the ratio of the intensity of the electromagnetic wave applied to the test object 50 to the test limit value is less than 0 to 50% The intensity of the electromagnetic wave is increased by 1 dB in the second section where the ratio of the intensity of the electromagnetic wave applied to the test object 50 is less than 50% to 90%, and the intensity of the electromagnetic wave applied to the test object 50 with respect to the test limit value The intensity of the electromagnetic wave can be controlled to increase by 0.2 dB from the 90% range to the 100% range.

As described above, the control unit 130 determines that the increase in the intensity of the electromagnetic wave applied to the test object 50 becomes smaller as the ratio of the intensity of the electromagnetic wave applied to the test object 50 with respect to the test limit value increases, that is, . When the ratio of the intensity of the electromagnetic wave applied to the test object 50 with respect to the test limit value is smaller than the reference ratio, the increase rate of the intensity of the electromagnetic wave is made larger than the reference increase and the test speed is increased. ) Is larger than the reference ratio, the increase of the intensity of the electromagnetic wave is made smaller than the reference increase, and the electromagnetic wave is prevented from being excessively injected into the test object 50.

The electromagnetic wave receiving unit 140 may measure the information of the emitted electromagnetic wave, for example, frequency, output, VSWR (Voltage Standing Wave Ratio) value, and the like, and may be a probe capable of measuring the intensity of the radiated electromagnetic wave . Various kinds of magnetic probes for measuring electromagnetic waves can be applied to the probe.

The control unit 130 may receive the intensity of the electromagnetic wave measured by the electromagnetic wave receiver 140. [ The control unit 130 can monitor whether the test object 50 is normally operated by the electromagnetic waves of the received intensity. The control unit 130 can increase the strength of the electromagnetic wave to control the electromagnetic wave radiated by the electromagnetic wave radiation unit 110 to have an increased intensity when the test object 50 normally operates under the intensity of the electromagnetic wave, The immunity level of the test object 50 can be measured repeatedly.

Hereinafter, the electromagnetic immunity test procedure according to the embodiment of the present invention will be described.

2 is a flowchart illustrating an electromagnetic wave test process according to an embodiment of the present invention.

As shown in FIG. 2, the setting unit 120 can set the test limit value (S200). The test limit value is a value at which the electromagnetic wave can be maximally allowed, for example, a value such as 100 V / m or the like.

The electromagnetic wave radiating part 110 emits an electromagnetic wave with a predetermined intensity to the test object 50 and the electromagnetic wave receiving part 140 can measure the intensity of the electromagnetic wave and transmit it to the control part 130. [

The control unit 130 can monitor whether the test object 50 is normally operated by the received electromagnetic waves. If the test object 50 operates normally under the intensity of the electromagnetic wave, It is possible to control the electromagnetic wave radiated by the electromagnetic wave radiating part 110 to have an increased intensity. Here, the control unit 130 may be configured to monitor whether the test object 50 is normally operated after receiving the electromagnetic wave. However, the present invention is not limited to this procedure. It is of course possible to receive the strength of the signal.

At this time, the controller 130 controls the increase of the intensity of the electromagnetic wave applied to the test object 50 to vary according to the ratio of the intensity of the electromagnetic wave applied to the test object 50 with respect to the set test limit value (S210) . For example, when the set test limit value is 100 V / m, the controller 130 sets the electromagnetic wave intensity at a rate of 30% or more at which the intensity of the electromagnetic wave of 30 V / m or more is applied to the test object 50 with respect to the test limit value (100 V / m) And the intensity of the electromagnetic wave is controlled to increase by 1 dB at a rate of 50% or more at which the intensity of electromagnetic waves of 50 V / m or more is applied to the test object 50. [

The control unit 130 may control the increase of the intensity of the electromagnetic wave applied to the test object 50 for each section divided according to the ratio of the intensity of the electromagnetic wave applied to the test object 50 with respect to the set test limit value have.

More specifically, the control unit 130 determines whether the electromagnetic wave corresponding to the test limit value is applied from the initial point (0% rate) in which the electromagnetic wave applied to the test object 50 is 0 to the test object 50 Can be divided into a plurality of sections according to the ratio of the intensity of the electromagnetic wave to be applied to the test object 50 with respect to the test limit value so that the increase in the intensity of the electromagnetic wave applied to the test object 50 can be varied for each section . For example, the control unit 130 increases the intensity of the electromagnetic wave by 3 dB in the first section where the ratio of the intensity of the electromagnetic wave applied to the test object 50 to the test limit value is less than 0 to 50% The intensity of the electromagnetic wave is increased by 1 dB in the second section where the ratio of the intensity of the electromagnetic wave applied to the test object 50 is less than 50% to 90%, and the intensity of the electromagnetic wave applied to the test object 50 with respect to the test limit value The intensity of the electromagnetic wave can be controlled to increase by 0.2 dB from the 90% range to the 100% range.

As described above, the control unit 130 determines that the increase in the intensity of the electromagnetic wave applied to the test object 50 becomes smaller as the ratio of the intensity of the electromagnetic wave applied to the test object 50 with respect to the test limit value increases, that is, . When the ratio of the intensity of the electromagnetic wave applied to the test object 50 with respect to the test limit value is smaller than the reference ratio, the increase rate of the intensity of the electromagnetic wave is made larger than the reference increase and the test speed is increased. ) Is larger than the reference ratio, the increase of the intensity of the electromagnetic wave is made smaller than the reference increase, and the electromagnetic wave is prevented from being excessively injected into the test object 50.

Embodiments of the present invention include a computer-readable medium having program instructions for performing various computer-implemented operations. This medium records a program for executing the electromagnetic test method described above. The medium may include program instructions, data files, data structures, etc., alone or in combination. Examples of such media include magnetic media such as hard disks, floppy disks and magnetic tape, optical recording media such as CD and DVD, programmed instructions such as floptical disk and magneto-optical media, ROM, RAM, And a hardware device configured to store and execute the program. Or such medium may be a transmission medium, such as optical or metal lines, waveguides, etc., including a carrier wave that transmits a signal specifying a program command, data structure, or the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, Of the right.

100: Electromagnetic wave test equipment
110: Electromagnetic wave radiation part
120: Setting section
130:
140:

Claims (7)

An electromagnetic wave immunity test method for testing the immunity of an electromagnetic wave by applying an electromagnetic wave to a test object,
Setting a test limit value, and
And controlling the increase of the intensity of the electromagnetic wave applied to the test object to vary according to the ratio of the intensity of the electromagnetic wave applied to the test object with respect to the set test limit value,
Wherein the step of controlling the increase of the intensity of the electromagnetic wave applied to the test object in accordance with the ratio of the intensity of the electromagnetic wave applied to the test object with respect to the set test limit value,
Dividing the time from when the electromagnetic wave is applied to the test object to the end point when the electromagnetic wave corresponding to the test limit value is applied to the test object is divided into a plurality of intervals according to the ratio of the intensity of the electromagnetic wave applied to the test object,
Wherein an increase in the intensity of the electromagnetic wave applied to the test object is controlled to become smaller as the ratio of the intensity of the electromagnetic wave applied to the test object increases. delete delete A computer-readable recording medium on which a computer program for executing the method of claim 1 is recorded. 1. An electromagnetic wave immunity test apparatus for testing electromagnetic wave immunity by applying electromagnetic waves to a test object,
A setting unit for setting a test limit value, and
And a controller for controlling the increase of the intensity of the electromagnetic wave applied to the test object in accordance with the ratio of the intensity of the electromagnetic wave applied to the test object with respect to the set test limit value,
Wherein,
Dividing the time from when the electromagnetic wave is applied to the test object to the end point when the electromagnetic wave corresponding to the test limit value is applied to the test object is divided into a plurality of intervals according to the ratio of the intensity of the electromagnetic wave applied to the test object,
And controls the increase of the intensity of the electromagnetic wave applied to the test object to become smaller as the ratio of the intensity of the electromagnetic wave applied to the test object increases. delete delete
KR1020150095686A 2015-07-06 2015-07-06 Electromagnetic Susceptibility Test Method and Apparatus KR101766234B1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101337343B1 (en) * 2012-12-18 2013-12-06 주식회사 현대케피코 Method for estimating field uniformity for electromagnetic susceptibility test
JP5678854B2 (en) * 2011-09-28 2015-03-04 株式会社デンソー Electromagnetic test equipment

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KR100340038B1 (en) 1999-12-23 2002-06-12 오길록 Appartus of ems test for vehicle

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5678854B2 (en) * 2011-09-28 2015-03-04 株式会社デンソー Electromagnetic test equipment
KR101337343B1 (en) * 2012-12-18 2013-12-06 주식회사 현대케피코 Method for estimating field uniformity for electromagnetic susceptibility test

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