Classifications

• • 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
  • G01R29/0864—Measuring electromagnetic field characteristics characterised by constructional or functional features
  • G01R29/0871—Complete apparatus or systems; circuits, e.g. receivers or amplifiers
• • 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
  • G01R29/0807—Measuring electromagnetic field characteristics characterised by the application
  • G01R29/0814—Field measurements related to measuring influence on or from apparatus, components or humans, e.g. in ESD, EMI, EMC, EMP testing, measuring radiation leakage; detecting presence of micro- or radiowave emitters; dosimetry; testing shielding; measurements related to lightning
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
  • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
  • G01R23/16—Spectrum analysis; Fourier analysis

Definitions

• the present invention relates to measures, analysis, and evaluation on electromagnetic waves closely associated with whether standard of digital products may pass, and particularly, to a remote controlled measuring apparatus for electromagnetic waves of a PCB (Printed Circuit Board) for measuring and analyzing intensity of the electromagnetic waves on the PCB where a digital element, an electromagnetic wave of a digital product, is mounted.
• PCB Print Circuit Board
• FIG. 1 is a rough diagram of a measuring apparatus for electromagnetic waves of prior art.
• the prior measuring apparatus for electromagnetic waves comprises: an electromagnetic scanner(l ⁇ l) for inducing currents by measuring electromagnetic waves generated from a circuit board in order to perceive the source of the electromagnetic waves; an analyzer(201) for receiving the induced currents from the electromagnetic scanner(l ⁇ l) through a coaxial cable to analyze the currents as field strength for a measured area; and a personal computer(301) for measuring and analyzing field strength with regards to particular frequency bands as measuring frequency bands in connection with the analyzer(201).
• a remote controlled measuring apparatus for electromagnetic waves of a PCB for scanning electromagnetic waves generated from the printed circuit board separably located in a remote place comprising: an electromagnetic scanner composed of a loading plate for supporting the printed circuit board which becomes an electromagnetic measurement target, a probe for sensing electromagnetic waves, a z-axis moving unit for moving the probe in z-axis direction, an xy-axis moving unit for moving the probe in xy-axis direction, a DC output terminal for outputting power supplied to the printed circuit board, a camera for inputting an image, an adapter for generating DC power supplied to the DC output terminal from an external supply voltage, a position controller for generating a control signal to the z- axis moving unit and the xy-axis moving unit, an image capturing unit for capturing the image inputted from the camera, an amplifier for amplifying an electromagnetic signal sensed by the probe, and a communication unit for communicating with an external apparatus; a spectrum analyzer for analyzing the electromagnetic waves measured by an electromagnetic scanner composed of a loading plate for supporting
• the present invention enables a technician for measuring electromagnetic waves to remotely control a measuring apparatus for electromagnetic waves located at a remote distance, thereby removing inconvenience of a person with a printed circuit board moving to a place where a person who measures electromagnetic waves is positioned.
• PCB in accordance with the present invention is self-equipped with an output terminal for outputting DC power to be applied to a printed circuit board, it is possible to reduce electromagnetic wave noise caused by usage of an adapter and an external supply voltage.
• PCB in accordance with the present invention provides a printed circuit board fixing jig which stably loads a printed circuit board, thereby stably measuring electromagnetic waves even on a rear side as well as on a front side of the printed circuit board.
• the remote controlled measuring apparatus for electromagnetic waves of a PCB in accordance with the present invention comprises a z-axis measuring unit capable of simply measuring height of a circuit component inserted into a printed circuit board, thereby easily measuring electromagnetic waves on various parts of the printed circuit board through consecutive operation.
• FIG. 1 is a rough diagram of a measuring apparatus for electromagnetic waves of prior art
• FIG. 2 is a block diagram of a measuring apparatus for electromagnetic waves of one embodiment in accordance with the present invention.
• FIG. 3 is a perspective view of an electromagnetic scanner of one embodiment in accordance with the present invention.
• FIG. 4 is a perspective view illustrating a state that an xy-axis moving unit of an electromagnetic scanner is moved
• FIG. 5 is a perspective view for illustrating a disposed position of a DC output terminal(20) of an electromagnetic scanner
• FIG. 6 is a perspective view of a z-axis moving unit of an electromagnetic scanner in accordance with the present invention.
• FIG. 7 is an exploded perspective view of a z-axis moving unit of an electromagnetic scanner in accordance with the present invention.
• FIG. 8 is a perspective view of a PCB fixing unit of one embodiment in accordance with the present invention.
• Fig. 2 is a block diagram of a remote controlled measuring apparatus for electromagnetic waves of a PCB in accordance with the present invention.
• the remote controlled measuring apparatus for electromagnetic waves of the PCB in accordance with the present invention comprises: an electromagnetic scanner(lOO); a spectrum analyzer(200) for analyzing electromagnetic waves measured by the electromagnetic scanner(lOO); a remote controlled computer(300) for receiving a result waveform from the spectrum analyzer(200) to transmit the received result waveform and an image signal sent from the electromagnetic scanner(lOO) through an Internet network(500), and for delivering a probe moving signal received through the Internet network(500) to the electromagnetic scanner(lOO); and a central controlled computer(600) for receiving the probe moving signal from an electromagnetic analysis expert located at a remote distance, and for displaying an analysis waveform inputted through the Internet network(500) from the remote controlled computer(300).
• the electromagnetic scanner(lOO) consists of a z-axis moving unit(30), an xy-axis moving unit(l ⁇ ), a DC output terminal(20), a camera(56), a probe(54), an adapter(97) for generating DC power supplied to the DC output terminal(20) from an external supply voltage, a position controller(95) for generating a control signal to the z-axis moving unit(30) and the xy-axis moving unit(l ⁇ ), an image capturing unit(93) for capturing an image inputted from the camera(56), an amplifier(91) for amplifying an electromagnetic signal sensed by the probe(54), and a communication unit(99) for communicating with an external apparatus.
• FIG. 3 is a perspective view of an electromagnetic scanner of one embodiment in accordance with the present invention
• Fig. 4 is a perspective view illustrating a state that an xy-axis moving unit of an electromagnetic scanner is moved
• Fig. 5 is a perspective view for illustrating a disposed position of a DC output terminal(20) of an electromagnetic scanner. From now on, the electromagnetic scanner of the one embodiment in accordance with the present invention will be described in reference to Fig. 3 through Fig. 5.
• the electromagnetic scanner(lOO) comprises printed circuit board fixing units(70) for fixing a printed circuit board(80), a loading plate(60) for loading the printed circuit board(80) fixed by the printed circuit board fixing units(70), an xy-axis moving unit(l ⁇ ) for moving a probe(54) in xy-axis direction, a z-axis moving unit(30) for moving the probe(54) in z-axis direction, and a camera support(58) for supporting a camera(56).
• the xy-axis moving unit(l ⁇ ) can be realized in LM guide or ball screw type, and like shown in Fig.
• the xy-axis moving unit(l ⁇ ) moves the proble(54) in x- axis direction and in y-axis direction.
• the DC output terminal(20) is located in a lower space of the xy-axis moving unit(l ⁇ ), so that a power line supplied to a printed circuit board(80) to be tested can be maximally maintained in short length, while it is not difficult to turn over the printed circuit board(80).
• various DC voltage output terminals are equipped in the DC output terminal (20).
• the printed circuit board fixing units(70) are inserted into four edges of the printed circuit board to stably fix the printed circuit board, so that the printed circuit board is located on the loading plate(60), and power is applied to the printed circuit board(STEP 1).
• the xy-axis moving unit(l ⁇ ) moves to an area to be measured on the printed circuit board, then the probe(54) is located(STEP 2).
• Position adjustment is performed as follows. Image information inputted to the camera(56) is captured by an image capturing unit(93), and the information is transmitted to a remote controlled computer(300) through a communication unit(99).
• the remote controlled computer(300) transmits the received image information to a central controlled computer(600) through an Internet network(500).
• the central controlled computer(600) comfirms that a transmitted image is displayed, inputs an xy-axis moving unit control signal and a z-axis moving unit control signal, and such control information is inputted to the remote controlled computer(300) through the Internet network(500), then is inputted to a position controller(95) via the communication unit(99).
• a position of the probe(54) is controlled according to a control signal of the position controller(95).
• the probe(54) scans the inside of the area to be measured on the printed circuit board as maintaining a measured maximum height(STEP 4). Electromagnetic waves sensed by the probe(54) are amplified by an amplifier(91), and are inputted to a spectrum analyzer(200) via the communication unit(99). Information displayed by being analyzed in the spectrum analyzer(200) is transmitted to the central controlled computer(600) via the Internet network(500) and the remote controlled computer(300)(STEP 5).
• FIG. 6 is a perspective view of a z-axis moving unit of an electromagnetic scanner in accordance with the present invention
• Fig. 7 is an exploded perspective view of a z-axis moving unit of an electromagnetic scanner in accordance with the present invention.
• a z-axis moving unit comprises: a body unit(32) equipped with a motor inside; a z- axis moving unit bracket(34) moving by the motor along one side of the body unit(32); a sensor fixing bracket(36) fixed to the z-axis moving unit bracket(34), and having sensors(38) attached to an upper side; a micro meta attachment bracket(40) equipped with micro meta for controlling a detailed position of the probe(54); a slide unit(48) sliding to prevent the probe(54) from dropping further when the probe(54) is contacted with an upper part of a circuit component, and having two guide pins(51,52) on an upper side; a guide bracket(47) having guide holes(43,45) for guiding the guide pins(51,52), and being fixed to the sensor fixing bracket(36); a supplementary bracket(42) fixed to the sensor fixing bracket(36), and guiding the slide unit(48); and a probe bracket(50) for fixing the probe(54) to the slide unit(48).
• the xy-axis moving unit(l ⁇ ) is moved to locate the probe(54) in an upper area of the circuit component to be measured, then the z-axis moving unit bracket(34) is moved in lower direction.
• the slide unit(48) moves in lower direction as well, and accordingly, the probe(54) moves in lower direction.
• the z-axis moving unit bracket(34), the supplementary bracket(42), the micro meta attachment bracket(40), and the guide bracket(45) move in lower direction at the same time, but the slide unit(48) is maintained at the current position as sliding along the supplementary bracket(42). It is because the probe(54) is contacted with the upper part of the circuit component, the probe(54) is fixed to the probe bracket(50), and the probe bracket(48) is fixed to the slide unit(48). Therefore, the guide pins(51,52) located in an upper part of the slide unit(48) are protruded outside the guide holes(43,45) formed on the guide bracket(47).
• FIG. 6 shows a state before the probe(54) is contacted with the upper part of the circuit component, illustrating that the sensor fixing bracket(36) drops in lower direction together with the probe(54), and (b) shows a state after the probe(54) is contacted with the upper part of the circuit component, illustrating that the guide pins(51,52) are protruded outside the guide holes since the probe(54) is maintained at the current position though the sensor fixing bracket(36) drops in the lower direction.
• Fig. 8 is a perspective view of a PCB fixing unit of one embodiment in accordance with the present invention.
• the PCB fixing unit(70) is made of a shock-absorbing material such as rubber, comprising a shock-absorbing unit(76) for mitigating shock imposed on a loading plate(60), a body unit(72) which is in square shape without a right side and being equipped with a screw groove in an upper part, and a screw unit(74) screw-coupled with the screw groove.
• Four edges of the printed circuit board are inserted into the groove being in the square shape without a right side of the body unit(72), and are closely adhered by the screw unit(74), then the adhered edges are put on the loading plate(60).

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Tests Of Electronic Circuits (AREA)
• Mathematical Physics (AREA)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

Country Status (3)

Cited By (3)

Families Citing this family (7)

Citations (5)

• 2006
  • 2006-11-10 KR KR1020060110780A patent/KR100840037B1/ko active IP Right Grant
• 2007
  • 2007-08-29 WO PCT/KR2007/004148 patent/WO2008056874A1/en active Application Filing
  • 2007-11-02 TW TW96141381A patent/TW200821590A/zh unknown

Patent Citations (5)

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