KR100875095B1 - Electro magnetic measuring appratus for printed circuit board - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic wave measuring device for a printed circuit board. The present invention relates to an electromagnetic wave measuring device for a printed circuit board for scanning electromagnetic waves generated from a printed circuit board on which a component is mounted in the z-axis direction on a printed circuit board placed in the xy direction. A loading plate for supporting a printed circuit board to be subjected to electromagnetic waves, a probe for detecting electromagnetic waves, a z moving part for moving the probe in the z-axis direction, an xy moving part for moving the probe in the xy axis direction, and a component A z-axis sensing sensor for sensing the z-axis value at the moment when the probe touches the upper part of the component mounted on the printed circuit board, a DC output terminal for supplying power to the printed circuit board, and z-movement to measure the generated electromagnetic waves And a position control unit for generating a control signal in the xy moving unit and an amplifying unit for amplifying the electromagnetic signal detected by the probe. Electromagnetic waves by including a scanner, according to the height of the components on the printed circuit board measured by the probe, moving the probe is provided with a printed circuit board, characterized in that the electromagnetic wave measuring apparatus for measuring an electromagnetic wave.

Description

Electromagnetic wave measuring device for printed circuit boards {ELECTRO MAGNETIC MEASURING APPRATUS FOR PRINTED CIRCUIT BOARD}

The present invention relates to countermeasures, analysis, and evaluation of electromagnetic waves that are closely related to whether a digital product has passed the standard. Especially, the electromagnetic wave intensity of a printed circuit board on which a digital device, which is an electromagnetic wave source of a digital product, is mounted is analyzed and measured remotely. A printed circuit board relates to an electromagnetic wave measuring device.

In recent years, as the use of electronic products and digital products increases, the respective products also vary accordingly. Each of these products generates electromagnetic waves in a printed circuit board state in which mounting components, transmission lines, or the like are assembled. The electromagnetic wave generated from each product has a considerable effect on the human body or the product, so the technology for measuring and analyzing the electromagnetic wave is important.

Technology for measuring electromagnetic waves generated in products such as printed circuit boards requires precision. In addition, as the size of the product increases, the measurement area is often constrained, and the limitation on the measurement area of the circuit board to be measured must be removed. On the other hand, in order to eliminate the complexity due to the interference or superposition of the electromagnetic wave, it should be developed in the direction of reducing the electromagnetic interference effect as much as possible.

An electromagnetic wave measuring device capable of precisely measuring electromagnetic radiation characteristics and measuring and analyzing the electromagnetic field strength with respect to three-dimensional coordinates is in use. 1 is a schematic diagram of a conventional electromagnetic wave measuring device.

As shown in FIG. 1, a conventional electromagnetic wave measuring apparatus includes an electromagnetic scanner 101 for measuring an electromagnetic wave generated from a circuit board to induce a current to detect an electromagnetic wave source, and a current induced by the electromagnetic scanner 101. Is received through a coaxial cable and the analyzer 201 to interpret the electromagnetic wave strength for the measurement region, and the personal computer 301 connected to the analyzer 201 to measure and analyze the electromagnetic wave intensity for a specific frequency band It consists of.

Since the conventional electromagnetic wave measuring device is a fixed device, it is not easy to move. Therefore, in order to measure the electromagnetic wave generated from the printed circuit board, a technician who can measure the electromagnetic wave worked, there was a inconvenience to bring the substrate to the place where the electromagnetic wave measuring device is installed. The task of measuring electromagnetic waves is not a problem that can be solved by having only a device, and requires a highly skilled technician to measure and interpret it.

In order to measure the electromagnetic wave generated from the printed circuit board, power should be applied to the printed circuit board. In the conventional electromagnetic wave measuring device, a power is applied to a printed circuit board using an external power source. That is, a method of connecting an adapter for converting an external commercial power supply to DC and supplying power to a printed circuit board using a wire output from the adapter is used. However, when using a method of applying power to the printed circuit board in the conventional electromagnetic measuring device, there is a problem that the measurement is not maintained precisely by the electromagnetic waves generated from the adapter's wire, the printed circuit board to the front and rear There was a problem in that the printed circuit board is placed in an unstable position due to the wire coming out of the adapter when it is turned over alternately.

In the case of measuring the electromagnetic wave of the printed circuit board, not only the front side of the printed circuit board into which the component elements are inserted, but also the back side where the welding is performed is examined. However, when inspecting the rear surface, the part where the circuit component element is inserted comes into contact with the bottom of the test plate, and the height of the circuit component element is not constant, so that the component is inclined in one direction, and further, it is not stable and does not maintain a stable position. In this case, when using the conventional electromagnetic wave measuring device, there is a problem in that the back side of the printed circuit board cannot be accurately measured.

In addition, in order to measure the electromagnetic wave generated from the printed circuit board, it is possible to measure the precise height of the component inserted in the printed circuit board, but precise electromagnetic wave measurement is possible in the case of the conventional electromagnetic wave measuring device. There was a problem that a device that can be measured easily is not presented.

The present invention is to solve the above problems, an object of the present invention is to provide an electromagnetic wave measuring device for a printed circuit board for controlling the electromagnetic wave measuring device remotely located.

It is still another object of the present invention to provide a printed circuit board electromagnetic wave measuring device having an output terminal for outputting a DC power to be applied to the printed circuit board inside the remote printed circuit board electromagnetic wave measuring device.

It is still another object of the present invention to provide a printed circuit board electromagnetic wave measuring apparatus having a printed circuit board fixing jig for stably loading a printed circuit board for measuring electromagnetic waves.

Still another object of the present invention is to provide a printed circuit board electromagnetic wave measuring device having a Z-axis measuring unit that can easily measure the height of a circuit component inserted on a printed circuit board.

An object of the present invention is a printed circuit board electromagnetic wave measuring device for scanning electromagnetic waves generated in a printed circuit board in which the components are mounted in the z-axis direction on the printed circuit board placed in the xy direction, the printed circuit board to be the electromagnetic wave measurement target A supporting plate, a probe for sensing electromagnetic waves, a z moving part for moving the probe in the z-axis direction, an xy moving part for moving the probe in the xy axis direction, and a probe for measuring electromagnetic waves generated in the part A sensing sensor for detecting a z-axis value at the moment of touching the upper part of the component mounted on the printed circuit board, a DC output terminal for supplying power to the printed circuit board, a z moving part and an xy moving part. And a microwave scanner including a position controller to generate and an amplifier configured to amplify the electromagnetic signal detected by the probe. Along the height of the part of the measured printed circuit board by moving the probe can be achieved by a printed circuit board, characterized in that the electromagnetic wave measuring apparatus for measuring an electromagnetic wave.

The present invention enables the electromagnetic wave measuring device to remotely control the electromagnetic wave measuring device remotely by the remote printed circuit board electromagnetic wave measuring device to eliminate the inconvenience of having to move to the place where the electromagnetic wave measuring device having a printed circuit board is located. It became.

The remote printed circuit board electromagnetic wave measuring apparatus of the present invention has an output terminal for outputting a DC power to be applied to the printed circuit board therein, thereby reducing electromagnetic noise due to the use of an external commercial power source and an adapter.

In addition, in the remote printed circuit board electromagnetic wave measuring apparatus of the present invention, by providing a printed circuit board fixing jig for stably loading the printed circuit board, it is possible to stably measure the electromagnetic waves not only on the front surface but also on the rear surface of the printed circuit board.

In the remote printed circuit board electromagnetic wave measuring apparatus of the present invention, by providing a Z-axis measuring unit that can easily measure the height of the circuit components inserted on the printed circuit board to easily measure the electromagnetic waves of various parts of the printed circuit board in a continuous operation. It became possible.

While the preferred embodiments of the present invention have been described using specific terms, such descriptions are for illustrative purposes only, and it is understood that various changes and modifications may be made without departing from the spirit and scope of the following claims. Should be done.

Hereinafter, with reference to the accompanying drawings will be described in detail the advantages, features and preferred embodiments of the present invention.

2 is a block diagram of an electromagnetic wave measuring device for a remote printed circuit board according to the present invention. The remote printed circuit board electromagnetic wave measuring apparatus of the present invention receives a result waveform from the electromagnetic wave scanner 100, the spectrum analyzer 200 for analyzing the electromagnetic waves measured from the electromagnetic scanner 100, and the spectrum analyzer 200 and receives the received waveform. And a remote control computer 300 for transmitting the image signal transmitted from the electromagnetic scanner 100 through the internet network 500 and transmitting the probe movement signal received through the internet network 500 to the electromagnetic scanner 100. And a central control computer 600 receiving a probe movement signal from an electromagnetic wave analysis expert located at a remote location, and displaying an analysis waveform input from the remote control computer 300 through the Internet network 500.

The electromagnetic scanner 100 is supplied to the DC output terminal 20 from the z moving unit 30, the xy moving unit 10, the DC output terminal 20, the camera 56, the probe 54, and an external power supply. Image capture unit for capturing an image input from the camera 97, the position control unit 95 for generating a control signal to the adapter 97, the z moving unit 30 and the xy moving unit 10 to generate a DC power 93, an amplifier 91 for amplifying the electromagnetic wave signal sensed by the probe 54, and a communication unit 99 for communicating with an external device.

3 is a perspective view of an electronic scanner according to an embodiment of the present invention, FIG. 4 is a perspective view showing a state in which an xy moving part of the electronic scanner is moved, and FIG. 5 is a position of the DC output terminal 20 of the electronic scanner. It is a perspective view for demonstrating. Hereinafter, an electronic scanner according to an embodiment of the present invention will be described with reference to FIGS. 3 to 5.

The electronic scanner 100 includes a printed circuit board fixing part 70 for fixing the printed circuit board 80 and a loading plate 60 for loading the printed circuit board 80 fixed by the printed circuit board fixing part 70. ), An xy moving part 10 for moving the probe 54 in the xy axis direction, a z moving part 30 for moving the probe 54 in the z axis direction, and a camera support 58 for supporting the camera 56. It is provided. The xy moving part 10 may be implemented by a method such as an LM guide or a ball screw, and moves the probe 54 in the x and y axis directions as shown in FIG. 4. In addition, as shown in FIG. 5, by placing the DC output terminal 20 in the lower space of the xy moving unit 10, the power line supplied to the printed circuit board 80 to be tested is kept as short as possible, and the printed circuit board ( It is possible to do it without any difficulty when flipping 80). The DC output terminal 20 is provided with various DC voltage output terminals.

Hereinafter, the operation of the remote printed circuit board electromagnetic wave measuring apparatus according to the present invention will be described. The printed circuit board fixing part 70 is inserted into four corners of the printed circuit board to stably fix the printed circuit board, and then, the printed circuit board is positioned on the loading board 60 and power is applied to the printed circuit board (STEP 1). The probe 54 is positioned by moving the xy moving part 10 to the area to be measured on the printed circuit board (STEP 2). The position adjustment captures the image information input to the camera 56 by the image capture unit 93 and then transmits the image information to the remote control computer 300 through the communication unit 99. The remote control computer 300 transmits the received image information to the central control computer 600 through the Internet network 500. The central control computer 600 sees the transmitted image displayed and inputs the xy moving part control signal and the z moving part control signal, and this control information is input to the remote control computer 300 through the Internet network 500. After that, it is input to the position control unit 95 via the communication unit 99. The position of the probe 54 is controlled according to the control signal of the position controller 95.

The height of the circuit component inserted in the area to be measured of the printed circuit board is measured (STEP 3). This height measurement method will be described in detail below. The probe 54 scans the area of the printed circuit board to be measured while maintaining the measured maximum height (STEP 4). Electromagnetic waves sensed by the probe 54 are amplified by the amplifier 91 and then input to the spectrum analyzer 200 via the communication unit 99. The information analyzed and displayed by the spectrum analyzer 200 is transmitted to the central control computer 600 via the remote control computer 300 and the Internet network 500 (STEP 5).

Figure 6 is a perspective view of the z moving unit of the electromagnetic scanner according to the present invention, Figure 7 is an exploded perspective view of the z moving unit of the electromagnetic scanner according to the present invention. Hereinafter, the structure and operation of the z moving unit of the electromagnetic scanner of the present invention will be described with reference to FIGS. 6 and 7.

The z moving part is fixed to the z-axis moving part bracket 34 and the z-axis moving part bracket 34 which are moved by the motor along one side of the body part 32 having a motor therein, the body part 32 and the z-axis moving part bracket 34. The sensor fixing bracket 36 with the sensor 38 attached thereto, the micro meta mounting bracket 40 with the micro meta to adjust the fine position of the probe 54, and the probe 54 touched the upper part of the circuit component. When the probe 54 is no longer lowered, the slide unit 48 includes two guide pins 51 and 52 on the upper side, and a guide hole 43 for guiding the guide pins 51 and 52. , A guide bracket 47 fixedly installed on the sensor fixing bracket 36, a secondary bracket 42 and a probe fixedly installed on the sensor fixing bracket 36, and guiding the slide portion 48. The probe bracket 50 which fixes 54 to the slide part 48 is provided.

Hereinafter, the operation of the z moving unit will be described. In order to measure the height of the circuit component inserted into the printed circuit board, the xy moving part 10 is moved to position the probe 54 in the upper region of the circuit part whose height is to be measured, and then the z-axis moving part bracket 34 ) Move downward. When the z-axis moving unit bracket 34 is moved in the downward direction, the slide unit 48 is also moved downward, and thus the probe 54 is also moved downward. When the probe 54 is gradually moved downward while contacting the upper part of the circuit component, the z-axis feeder bracket 34, the auxiliary bracket 42, the micro meta attachment bracket 40 and the guide bracket 45 simultaneously move downward. While moving to the slide unit 48 is maintained along the sliding position along the auxiliary bracket 42. This is because the probe 54 abuts on the upper part of the assembly, the probe 54 is fixed to the probe bracket 50, and the probe bracket 48 is fixed to the slide portion 48. Therefore, the guide pins 51 and 52 positioned above the slide portion 48 protrude out of the guide holes 43 and 45 formed in the guide bracket 47. The guide pins 51 and 52 protruding out of the guide holes 43 and 45 are detected by the sensor 38 so that the height of the circuit components inserted into the printed circuit board can be determined. In FIG. 6, (a) illustrates a case where the sensor fixing bracket 36 descends downward with the probe 54 as the state before the probe 54 contacts the upper part of the circuit component. After the probe 54 is in contact with the upper part of the circuit component, the sensor fixing bracket 36 is lowered downward, but the probe 54 is held at the current position, so the guide pins 51 and 52 protrude out of the guide groove. It is a figure which shows the state to become.

8 is a perspective view of a printed circuit board fixing part according to an embodiment of the present invention. The printed circuit board fixing part 70 is made of a cushioning material such as rubber to cushion the impact with the loading plate 60, the buffer part 76, and the upper portion of the 'c' shaped body portion 72 is provided with a screw groove. ) And a screw portion 74 screwed to the screw groove. The four corners of the printed circuit board are inserted into the 'c'-shaped grooves of the body part 72, and then fixed to the loading part 60 by being tightly fixed by the screw part 74. By using the printed circuit board fixing part 70 as shown in FIG. 8, the printed circuit board can be stably fixed to the printed circuit board from the bottom. Of course, the separation height can be easily changed by adjusting the height of the buffer portion 76 or the height of the lower surface of the '72' shaped body portion 72.

1 is a schematic diagram of a conventional electromagnetic wave measuring device.

2 is a block diagram of an electromagnetic wave measuring device according to an embodiment of the present invention.

3 is a perspective view of an electronic scanner of one embodiment according to the present invention;

4 is a perspective view illustrating a state in which an xy moving unit of the electronic scanner is moved.

5 is a perspective view for explaining a position where the DC output terminal 20 of the electronic scanner is provided.

Figure 6 is a perspective view of the z moving portion of the electromagnetic scanner according to the present invention.

Figure 7 is an exploded perspective view of the z moving portion of the electromagnetic scanner according to the present invention.

8 is a perspective view of a printed circuit board fixing part of an embodiment according to the present invention;

***** Brief description of the main symbols on the drawing *****

10: xy moving part 20: DC output terminal

30: z moving part 54: probe

56: camera 60: loading plate

80: printed circuit board 91: amplifier

93: image capture unit 95: position control unit

97: adapter 99: communication unit

100: electromagnetic scanner 200: spectrum analyzer

300: remote control computer 500: Internet network

600: central control computer

Claims (9)

1. A printed circuit board electromagnetic wave measuring device for scanning electromagnetic waves generated from a printed circuit board on which a component is mounted in a z-axis direction on a printed circuit board placed in an xy direction. A loading plate supporting a printed circuit board to be an electromagnetic wave measurement object; A probe for sensing electromagnetic waves; A z moving unit for moving the probe in a z axis direction; An xy moving unit which moves the probe in the xy axis direction; A sensor for sensing a z-axis value at the moment when the probe touches an upper portion of the component mounted on the printed circuit board to measure electromagnetic waves generated from the component; A DC output terminal for supplying power to the printed circuit board; A position controller configured to generate a control signal to the z moving unit and the xy moving unit; Printed circuit, characterized in that for measuring the electromagnetic wave by moving the probe along the height of the component of the printed circuit board measured by the probe by including an amplification unit for amplifying the electromagnetic wave signal detected by the probe Substrate electromagnetic wave measuring device. The method of claim 1, A slide part having the probe at one end and a guide pin at the other end, and descending in the z-axis direction together with the slide part, and z for sliding the slide part when the upper part of the printed circuit board is in contact with the probe. And a shaft moving unit bracket, wherein the detection sensor detects the guide pin. The method of claim 1, The electromagnetic scanner It further includes a camera for receiving an image, an adapter for generating a DC power supplied to the DC output terminal from an external commercial power source, an image capture unit for capturing an image input from the camera, and a communication unit for communicating with an external device, A spectrum analyzer for analyzing electromagnetic waves measured from the electromagnetic scanner; A remote control computer that receives a result waveform from the spectrum analyzer, transmits the received result waveform and the image signal transmitted from the electromagnetic scanner through an internet network, and transmits a probe movement signal received through the internet network to the electromagnetic scanner. ; And And a central control computer configured to receive a probe movement signal from an electromagnetic wave analysis expert located at a remote location and to display an analysis waveform input from the remote control computer through an internet network. The method of claim 3, wherein The z moving part Body portion having a motor therein, the z-axis moving unit bracket moving by the motor along one side of the body portion, the sensor fixing bracket is fixed to the z-axis moving unit bracket and having a sensor attached to the upper surface, the probe The slide slides so that the probe does not fall any more when the upper part touches the circuit component, and includes a slide part having a guide pin on the upper side, a guide hole for guiding the guide pin, and a guide fixed to the bracket for fixing the sensor. And a probe bracket fixed to the bracket, the sensor fixing bracket, to guide the slide unit, and a probe bracket to fix the probe to the slide unit. The method according to claim 1 or 3, The printed circuit board electromagnetic wave measuring device further comprises a printed circuit board fixing portion for tightly fixing the printed circuit board, and having a buffer material for providing a buffer force between the loading plate and the printed circuit board. The method of claim 5, The printed circuit board fixing portion Comprising the buffer member is provided with a buffer portion provided to the bottom to cushion the impact with the loading plate, the upper portion having a 'c' shaped body portion is provided with a screw groove and a screw portion screwed to the screw groove Printed circuit board electromagnetic wave measuring device characterized in that. The method according to claim 1 or 3, The xy driving unit is a printed circuit board electromagnetic wave measuring device, characterized in that formed by the LM guide. The method according to claim 1 or 3, The xy drive unit is a printed circuit board electromagnetic wave measuring device, characterized in that formed by a ball screw. The method according to claim 2 or 4, The electromagnetic wave measuring apparatus of claim 1, wherein the z moving unit further includes a bracket for attaching a micro meta having a micro meta to adjust a fine position.

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