JP2010025768A - Electromagnetic wave measurement apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromagnetic wave measurement apparatus for accurately obtaining a measurement result of a noise corresponding to a position of a to-be-measured object displayed on a screen. <P>SOLUTION: The electromagnetic wave measurement apparatus includes: an electromagnetic probe for detecting electromagnetic waves radiated from a control circuit board 3 mounted to a vehicle; a jig 4 for movably supporting the electromagnetic probe in the X-direction at least; a spectrum analyzer 6 for calculating a strength in a predetermined frequency band of the electromagnetic waves detected by the electromagnetic probe; a PC 7 for identifying a measurement position in which the strength of the electromagnetic waves of a preset predetermined strength or more is detected on the control circuit board 3 based on the strength of the electromagnetic waves calculated by the spectrum analyzer 6 and a position of the electromagnetic probe moved by the jig 4; and a laser oscillator for indicating the measurement position identified by the PC 7. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electromagnetic wave measuring apparatus.

2. Description of the Related Art Conventionally, an electromagnetic wave measuring apparatus that measures the intensity of an electric field or a magnetic field of an object to be measured such as a substrate while scanning in the X-axis and Y-axis directions in order to specify a noise generation source is known (for example, a patent) Reference 1).
In addition, there is a noise finder device that displays the intensity of measured noise (electromagnetic wave) on a video screen of an object to be measured such as a substrate (for example, see Patent Document 2).
JP 2000-346886 A Japanese Patent No. 2769472

  By the way, the above-described conventional apparatus is configured to capture and display an object to be measured by a CCD camera using a general optical lens. Therefore, for example, as shown in FIG. 18, an object closer to the lens appears larger, and the farther away from the lens, the smaller the magnification appears, so that the perspective is emphasized and mounted on the substrate 200 depending on the shooting position. There is a problem that the size of the part changes, and the relative position of the part corresponding to the noise measurement position on the screen may not be accurately grasped.

  The present invention has been made in view of the above circumstances, and provides an electromagnetic wave measuring apparatus capable of accurately grasping a measurement result of noise corresponding to the position of an object to be measured displayed on a screen. .

  In order to solve the above-mentioned problem, the invention described in claim 1 is an electromagnetic wave detecting means (for example, an electromagnetic wave detecting means capable of detecting electromagnetic waves radiated from a measurement object mounted on a vehicle (for example, the control circuit board 3 in the embodiment). The electromagnetic wave measurement apparatus includes the electromagnetic field probes 38 and 104 in the embodiment, and is movable to support the electromagnetic wave detection means so as to be movable at least in a predetermined first direction (for example, the X-axis direction in the embodiment). Mechanism (for example, the jig 4, the apparatus main body 102 in the embodiment) and processing means for calculating the intensity of the electromagnetic wave detected by the electromagnetic wave detecting means in a predetermined frequency band (for example, the spectrum analyzer 6, the arithmetic unit in the embodiment) 110), the intensity of the electromagnetic wave calculated by the processing means, and the movement position of the electromagnetic wave detection means by the movable mechanism. And specifying means (for example, PC7 in the embodiment) for specifying the measurement position on the object to be measured where the intensity of the electromagnetic wave equal to or higher than a predetermined intensity set in advance is measured, and the measurement specified by the specifying means It is characterized by comprising instruction means for indicating the position (for example, the laser oscillator 44 in the embodiment).

  The invention described in claim 2 is characterized in that, in the invention described in claim 1, the instruction means is supported by the movable mechanism.

  According to a third aspect of the present invention, in the second aspect of the present invention, the movable mechanism supports a plurality of electromagnetic wave measuring means, and the instruction means is disposed between two predetermined electromagnetic wave measuring means. It is characterized by that.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, the indicating unit is arranged at a position surrounded by the plurality of electromagnetic wave measuring units.

  The invention described in claim 5 is the invention according to any one of claims 1 to 4, wherein the movable mechanism is a movable part that supports the electromagnetic wave measuring means (for example, the movable part 35 in the embodiment). And a frame body (for example, the frame body 11 in the embodiment) that movably supports the movable portion.

  A sixth aspect of the present invention provides the obstacle according to any one of the first to sixth aspects, wherein an obstacle that can contact the electromagnetic wave detecting means during the movement of the electromagnetic wave detecting means is detected. An object detecting means (for example, the laser units 45 and 108 in the embodiment) is provided, and when the obstacle is detected by the obstacle detecting means, the movement of the electromagnetic wave detecting means by the movable mechanism is stopped. And

  According to the first aspect of the present invention, the electromagnetic wave radiated from the object to be measured is detected by the electromagnetic wave detecting means while the electromagnetic wave detecting means is moved at least in the predetermined first direction by the movable mechanism, and the detected electromagnetic wave is detected. The intensity is calculated by the processing means, and the measurement position of the object to be measured that is equal to or higher than a predetermined intensity set in advance can be indicated by the instruction means based on the calculation result. There is an effect that it is possible to more accurately grasp the part on the object to be measured that is estimated as follows.

  According to the second aspect of the present invention, in addition to the effect of the first aspect, the instruction unit is supported by the movable mechanism, whereby the movement of the instruction unit and the movement of the electromagnetic wave measurement unit are performed by a single movable mechanism. Therefore, it is possible to prevent the configuration from being complicated as compared with the case where the instruction unit and the electromagnetic wave measurement unit are individually movable.

  According to the invention described in claim 3, in addition to the effect of claim 1 or 2, a plurality of electromagnetic wave measuring means are supported by the movable mechanism, and two predetermined electromagnetic wave measuring means, that is, one electromagnetic wave measuring means and the other. By arranging the indicating means between the electromagnetic wave measuring means, the space between the electromagnetic wave measuring means can be effectively utilized when a plurality of electromagnetic wave measuring means are used.

  According to the invention described in claim 4, in addition to the effect of claim 3, since the instruction unit is disposed at a position surrounded by the plurality of electromagnetic wave measurement units, there is an effect that further space can be effectively used. is there.

  According to the fifth aspect of the present invention, in addition to the effect of any one of the first to fourth aspects, the moving position of the electromagnetic wave measuring means and the indicating means can be further increased by moving the movable portion along the frame. It can be controlled accurately.

  According to the invention described in claim 6, in addition to the effect of any one of claims 1 to 5, when an obstacle is detected by the obstacle detection means, the electromagnetic wave detection means by the movable mechanism automatically. Since the movement can be stopped, the electromagnetic wave detecting means can be prevented from coming into contact with the obstacle.

Next, an electromagnetic wave measuring apparatus according to a first embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, an electromagnetic wave measuring apparatus 1 according to the first embodiment includes a control circuit board (measured part) 3 such as a power control unit arranged behind a rear seat of a vehicle 2 such as a hybrid car. The vehicle 2 is used to identify a source of noise radiated while traveling on a chassis dynamo or test road, a jig 4 fixed to the control circuit board 3, and a controller for controlling the driving of the jig 4. 5, a spectrum analyzer 6, and a PC (Personal Computer) 7.

  As shown in FIGS. 2 and 3, the jig 4 includes a frame 11 that defines a substantially rectangular measurement region. The frame 11 includes a pair of X frame portions 12 extending in a predetermined X axis direction and arranged in parallel to each other, and a pair of Y frame portions 13 extending in a Y axis direction perpendicular to the X axis direction. The X frame portion 12 and the Y frame portion 13 are orthogonal to each other at their end portions. A plate-like support member 14 is fixed inside the frame body 11 along the lower surfaces of the X frame portion 12 and the Y frame portion 13. Further, the corner portion 16 of the frame body 11 is provided with a boss 17 for fastening to the control circuit board 3 or a member that supports the control circuit board 3 as a part to be measured. The relative position between the substrate 3 and the frame 11 is fixed. Thereby, the shift | offset | difference of the measurement position resulting from the vibration etc. during vehicle travel can be prevented.

  A Y-axis guide 20 is fixed to both ends of the support member 14 extending inside the lower portion of one Y frame portion 13 along the extending direction of the Y frame portion 13. Exist. On a support member 14 (see FIG. 3) that extends to the lower inner side of the other Y frame portion 13, a Y axis ball screw 21 that makes a pair with the Y axis guide 20 is parallel to the Y frame portion 13 and the Y axis guide 20. It is supported rotatably. A Y-axis stepping motor 22 is disposed on the base side of the Y-axis ball screw 21, and its drive shaft is linked to the Y-axis ball screw 21, so that the Y-axis ball screw 21 is driven by the driving force of the Y-axis stepping motor 22. It can be turned.

Further, an X-axis guide 25 is attached along the X frame portion 12 between the Y-axis guide 20 and the Y-axis ball screw 21. The X-axis guide 25 includes a slide support portion (not shown) that is slidably supported by the Y-axis guide 20 at one end, and can be displaced in the Y-axis direction according to the rotation of the Y-axis ball screw 21 at the other end. A ball screw nut (not shown) is provided.
In the vicinity of the slide support portion of the X-axis guide 25, tensioners 26 are connected to both sides in the sliding direction, and the tensioners 26 are respectively pushed and pulled according to the rotation of the Y-axis ball screw 21 via the pulley 27. ing. Accordingly, both ends of the X-axis guide 25 are displaced in the same direction and by the same amount in accordance with the rotation of the Y-axis ball screw 21, so that the X-axis guide 25 is always parallel to the X frame portion 12. keep.

  The X-axis guide 25 has an X-axis driving pulley and an X-axis driven pulley 28 (not shown) disposed at both ends thereof, and an X-axis timing belt 29 is interposed between the X-axis driving pulley and the X-axis driven pulley 28. It is being handed over. An X-axis stepping motor 30 is disposed in the vicinity of the X-axis driving pulley. The drive shaft of the X-axis stepping motor 30 is linked to the X-axis driving pulley, and is driven by the driving force of the X-axis stepping motor 30. When the X-axis driving pulley rotates, the X-axis timing belt 29 rotates between the X-axis driving pulley and the X-axis driven pulley 28.

  As shown in FIG. 3, a movable portion 35 is slidably attached to the X-axis guide 25, and the movable portion 35 is fixed to the X-axis timing belt 29 described above to rotate the X-axis timing belt 29. It is slid along the X-axis direction according to the amount. The movable portion 35 is attached with an array probe 36 for measuring electromagnetic waves, the details of which will be described later.

  As shown in FIG. 4, the array probe 36 includes four substantially cylindrical electromagnetic field probes 38 that extend in a vertical direction from the surface of the movable body 37 on the object to be measured (upper surface in FIG. 4). . As described above, the array probe 36 is configured by the plurality of electromagnetic field probes 38, so that the measurement range at one measurement location is expanded. Each of the electromagnetic field probes 38 is attached to the movable body 37 via a fastening member 39 such as a screw on the base side, and the end side of the electromagnetic field probe 38 is opposed to the control circuit board 3 that is an object to be measured. It becomes the detection part 40 to detect. And these detection parts 40 are arrange | positioned so that a rectangle may be exhibited, if the center position of the latest detection part 40 is connected with a straight line. The detection results of the electromagnetic field probe 38 configured in this way are each input to the spectrum analyzer 6.

  As shown in FIG. 5, the movable part main body 37 is provided with a camera 42 at a position between the two electromagnetic field probes 38. The camera 42 has a telecentric imaging lens 43 (see FIG. 6) that performs equal magnification projection with parallel light, and outputs captured image data to the PC 7. The telecentric imaging lens 43 provides a planar image in which the size of the object to be imaged does not change according to the distance from the telecentric imaging lens 43.

  Near the camera 42 of the movable body 37, a laser oscillator 44 for a laser pointer for instructing a specific measurement position on the control circuit board 3, which is an object to be measured, is provided to the electromagnetic field probe 38 in accordance with a control command of the PC 7. Installed in the enclosed central position. The laser oscillator 44 is configured such that its optical axis intersects the control circuit board 3 substantially perpendicularly. Note that the arrangement of the camera 42 and the laser oscillator 44 may be interchanged.

  Further, the movable part main body 37 is provided with an obstacle detection laser unit 45 for detecting an obstacle likely to collide with the electromagnetic field probe 38. The obstacle detection laser unit 45 includes, for example, a laser oscillation element and a light receiving element, and is disposed on the periphery of the lower surface of the movable portion main body 37 on the side where the electromagnetic field probe 38 is disposed. The position where the optical axis is blocked is detected based on the light receiving level of the light receiving element, and the presence or absence of an obstacle that may collide is determined according to the detected position. Then, when it is determined that there is an obstacle that may collide due to the optical axis of the laser unit 45 for obstacle detection being blocked, the movement (scanning) of the movable part main body 37 is stopped by the control unit 5. It has become.

  A control unit 5 is connected to the jig 4, and an X-axis stepping motor 30 and a Y-axis stepping motor 22 are driven in accordance with a control command from the control unit 5. For example, as shown by the arrows shown in FIG. 3, the movable portion 35 has a predetermined pitch that is less than or equal to the measurement width a (see FIG. 4) of the array probe 36 in each measurement region of the vertical width y and the horizontal width x inside the frame 11. In c, scanning is performed in the XY directions. Here, the above-mentioned predetermined pitch c is, for example, a pitch considering the size in order to specify the position of a component or harness mounted on the control circuit board 3 which is a device under measurement, or measurement of the array probe 36. The pitch is appropriately set to a pitch divisible by the width a, a pitch smaller than the imaging width b (see FIG. 5) by the camera 42, or the like.

  The control unit 5 controls the movement position of the movable unit 35 by individually driving and controlling the X-axis stepping motor and the Y-axis stepping motor 22 based on the control commands output from the PC. Further, the control unit 5 associates the imaging position information with the image data captured by the camera 42 and outputs the image data to the PC 7.

  The spectrum analyzer 6 performs frequency analysis on the detection result of the electromagnetic field probe 38, and one unit is provided for each of the four electromagnetic field probes 38 described above. These four spectrum analyzers 6 are housed in a single case, and calculate the intensity of electromagnetic waves (electric field / magnetic field) for each frequency in a predetermined frequency band among the electromagnetic waves detected by each electromagnetic field probe. The calculation result is output to the PC 7. In addition, although the example which puts the spectrum analyzer 6 in a single case was demonstrated, it is not restricted to this structure.

  The PC 7 is of a so-called laptop type that can be placed on the passenger seat of the vehicle 2. Image data is input from the control unit 5 and electromagnetic wave intensity data is input from the spectrum analyzer 6. The PC 7 performs data processing based on the input intensity data and image data, creates an electromagnetic wave intensity distribution chart on the control circuit board 3, and displays it on the display 32 (see FIG. 7). This intensity distribution diagram is configured by superimposing the data processing results on the entire image of the control circuit board 3 in a state where the object to be measured is seen through. Here, the result of the data processing of the intensity data is formed in, for example, contour lines as the intensity distribution of the electromagnetic wave measured at each position of the control circuit board 3, and further, a complementary process is performed to smooth the contour lines. . In addition, the entire image of the control circuit board 3 that is the object to be measured is created by connecting the images captured by the camera 42 at each movement position of the movable portion 35 by the PC 7.

  The PC 7 corrects variations in the detection results of the four electromagnetic field probes 38, respectively. More specifically, a state in which the control circuit board 3 which is the object to be measured is not energized, that is, dark noise before the start of measurement is detected by the four electromagnetic field probes 38 and the detection result of one electromagnetic field probe 38 is obtained. A difference in intensity data based on the detection result of the other electromagnetic field probe 38 is obtained with the intensity data based on the basis, and this difference is stored as a correction value in a memory (not shown) or the like. When the electromagnetic field is detected with the control circuit board 3 in operation, the correction value stored in the memory or the like is reflected (for example, subtraction processing) on the intensity data of the other electromagnetic field probe 38.

Here, a method of creating an intensity distribution diagram will be described using a 3 × 3 point map shown in FIGS. 8 and 9 as an example. For convenience of illustration, the intensity waveform in FIG. 8 is an image diagram, and the maximum value does not correspond to the maximum value in FIG.
First, electromagnetic waves are measured by each electromagnetic field probe 38 in each measurement area A to I by the array probe 36. Then, the intensity of the electromagnetic wave is calculated by the spectrum analyzer 6 based on the detection result of the electromagnetic field probe 38.

  Then, the maximum intensity in the predetermined frequency range is extracted from the electromagnetic wave intensity in the predetermined frequency range by the spectrum analyzer 6. Then, the center point P1 of the measurement area that becomes the overall maximum intensity (in the case of FIG. 8, “110” of the measurement area E), and the center points P2 to P9 of the measurement areas A to D and F to I adjacent to the eight directions. And the center points P1 to P9 of the adjacent measurement areas A to D and F to I are the maximum intensity in the measurement area (for example, “50” in the case of the measurement area F in FIGS. 8 and 9). To do.

  Then, the intensity difference between the center point P1 (for example, intensity “110”) of the measurement area E having the maximum intensity and the center point P6 (for example, intensity “50”) of the adjacent measurement area F is equally spaced ( For example, a memory with an intensity of “10” is set. Then, after setting the equally spaced memories for the straight lines between the other measurement areas A to D and G to I and the measurement area E in the same manner, the memories of the same intensity level of the adjacent straight lines are set to the same. Connect with distinguishable lines such as line type and same color. Thereafter, a complementing process for smoothing the contour lines is performed.

  When the PC 7 creates the above-described intensity distribution diagram of the electromagnetic wave, the PC 7 has a predetermined intensity or more (which is set in advance to identify the intensity data having a relatively high intensity of the electromagnetic wave based on the intensity data calculated by the spectrum analyzer 6 ( For example, the intensity data of the electromagnetic wave having the maximum intensity) is specified, and the measurement position (coordinates) that becomes the intensity of the electromagnetic wave having a predetermined intensity or more is specified. Then, a control command for moving the movable portion 35 to the measurement position is output, and then, when the movable portion 35 arrives at the measurement position, a control command for emitting laser light from the laser oscillator 44 for the laser pointer is output. As a result, the laser pointer laser light is applied to the measurement position on the control circuit board 3 that has a predetermined intensity or more and is instructed. In addition, when there are a plurality of measurement positions having a predetermined intensity or more, for example, it may be set so that instructions are sequentially given at predetermined intervals from a measurement position having a high intensity.

The electromagnetic wave measuring apparatus according to the first embodiment has the above-described configuration. Next, a procedure for measuring electromagnetic waves by the electromagnetic wave measuring apparatus 1 will be described with reference to the flowchart of FIG.
First, in step S01, the electromagnetic wave measuring device 1 is assembled to the vehicle. That is, the jig 4 is fixed in position with respect to the control circuit board 3, and the PC 7, the controller 5, and the spectrum analyzer 6 are connected. Then, the PC 7 is turned on to start the dedicated software, and the control unit 3 is photographed by the camera 42 by operating the movable part 35 at a predetermined pitch (for example, the imaging width b). Further, the spectrum analyzer 6 is turned on.

Next, in step S02, the type (specification) of the electromagnetic field probe 38 to be used is selected through the keyboard of the PC 7, and the measurement conditions of the spectrum analyzer 6 are set. Next, in step S03, the measurement is performed by the jig 4. Enter the possible measurable range.
In step S04, difference data for correcting variations in the detection results of the electromagnetic field probe 38 are stored.

In step S05, a measurement range, that is, a range in which the movable portion 35 is scanned (for example, the above-described vertical width y and horizontal width x) is input.
In step S06, for example, a value such as a pitch for scanning the movable portion 35 is input as a measurement condition.
In step S07, the measurement start button is clicked to start electromagnetic wave measurement.

In step S08, the electromagnetic field probe 38 detects an electromagnetic wave, and the spectrum analyzer 6 analyzes the intensity for each frequency.
In step S09, the intensity data subjected to the intensity analysis is taken into PC7.
In step S10, an electromagnetic field intensity distribution diagram (contour diagram) is created by synthesizing the intensity data obtained by intensity analysis with the entire image (not shown) obtained by combining the images of the control circuit board 3 photographed by the camera 42, and the PC 7 Is displayed on the display 32 (see FIG. 7).
In step S11, a measurement end message (not shown) indicating that the electromagnetic wave measurement has ended is displayed on the display of the PC 7.

In step S12, the measurement position (coordinates) of the maximum intensity is extracted based on the user's operation input. In step S13, the movable part 35 is moved to the measurement position (coordinates) of the maximum intensity, and is provided in the movable part 35. The laser pointer 44 for laser pointer is used to give an instruction by irradiating a laser beam to a part having a predetermined intensity or higher (for example, maximum intensity).
In step S14, interpolation processing is performed on the electromagnetic field intensity distribution map to obtain a smooth contour line intensity distribution map (contour diagram).

  Therefore, according to the first embodiment described above, the electromagnetic wave radiated from the control circuit board 3 while the electromagnetic field probe 38 is moved (scanned) in the X-axis direction and the Y-axis direction by the movable portion 35 is changed to the electromagnetic field probe. , The intensity of the detected electromagnetic wave is calculated by the spectrum analyzer 6, and the control circuit board 3 at the measurement position where the intensity is equal to or higher than a predetermined intensity is calculated based on the calculation result, for example, as shown in FIG. As shown in FIG. 5, the laser oscillator 44 can irradiate and instruct a laser beam (indicated by a broken line in FIG. 11), so that the part on the control circuit board 3 estimated to be a radiation source of relatively high intensity electromagnetic waves. Can be grasped more accurately. In FIG. 11, an image of the intensity distribution of the electromagnetic wave is shown on the control circuit board 3 in order to show the irradiation position of the laser beam.

Further, since the laser oscillator 44 is supported by the movable portion 35, the laser oscillator 44 and the electromagnetic field probe 38 can be moved by the single movable portion 35. Therefore, the laser oscillator 44 and the electromagnetic field probe can be moved. Comparing the configuration to the configuration in which the control unit 38 can be moved individually can be prevented.
A plurality of electromagnetic field probes 38 are supported by the movable portion 35. For example, a laser oscillator 44 is disposed between two predetermined electromagnetic field probes 38, that is, one electromagnetic field probe 38 and another electromagnetic field probe 38. If this is the case, the space between the two electromagnetic field probes 38 can be effectively utilized. On the other hand, if the laser oscillator 44 is disposed at a position surrounded by the plurality of electromagnetic field probes 38, further You can make effective use of space.

Furthermore, since the movable part 35 can be moved along the frame 11, the movement position of the movable part 35 can be controlled more accurately.
Further, when an obstacle is detected by the laser unit 45, the movement of the electromagnetic field probe 38 by the movable portion 35 can be automatically stopped, so that the electromagnetic field probe 38 is prevented from contacting the obstacle. be able to.

  In the above-described first embodiment, the case where the movable unit 35 is scanned at a predetermined pitch along the X axis and the Y axis has been described. However, the present invention is not limited to this configuration. For example, as another example, It may be configured to be displaceable by an actuator or the like in the Z-axis direction perpendicular to the X-axis and Y-axis. Specifically, after scanning along the X axis and the Y axis and displaying the measurement result, the electromagnetic wave becomes larger than a predetermined intensity (for example, the maximum intensity during display) as shown in FIGS. At a plurality of measurement positions in the region, the electromagnetic field probe 38 is gradually approached to the control circuit board 3 (in other words, the distance h in the height direction in FIG. 12 is decreased) to detect the electromagnetic wave. . Then, even in a region where the intensity is greater than the predetermined intensity, the intensity of the electromagnetic wave detected by the electromagnetic field probe 38 is reduced when it is brought close to a component near the noise source 46 (see FIG. 12) that radiates the electromagnetic wave. Or change in intensity is negligible.

  On the other hand, when the electromagnetic field probe 38 is brought close to the components of the noise source 46, as shown in the graph of FIG. 13, when the height h is changed from h = 5 to 0 cm, the height h is 3 to 5 cm. In this case, the level of the detected electric field / magnetic field is low and it is difficult to measure the intensity. However, as the height h decreases, the electric field / magnetic field intensity increases and the sensitivity tends to improve. That is, by configuring as in the other embodiments, it is possible to narrow down the position of the noise source 46 where the electromagnetic wave having a relatively high intensity is radiated, and superimpose the position on the telecentric image with less distortion. Can be read accurately. Further, since the position where the narrowed maximum intensity is obtained can be more accurately indicated by the laser beam, the noise source 46 can be narrowed down efficiently.

  As still another example of the above-described first embodiment, the movable portion 35 can be configured by mounting the array probe 36 and the laser oscillators 44 and 45 on a plurality of substrates. As an example of this configuration, for example, as shown in FIG. 14, the movable portion 35 includes a first substrate 50 on which an obstacle detection laser unit 45 is mounted, two laser units 45, and an electromagnetic field probe 38 therebetween. The second substrate 51 on which the amplifier 55 constituting the array probe 36 is mounted, the third substrate 52 on which only the laser oscillator 44 for the laser pointer is mounted, and the fourth substrate 53 having the same arrangement configuration as the second substrate 51. And five substrates of the fifth substrate 54 having the same configuration as the first substrate are stacked. By mounting the array probe 36, the laser oscillator 44, and the laser unit 45 on each substrate as in this embodiment, the movable portion 35 can be reduced in size. Further, the first and fifth substrates 50 and 54 having the same substrate configuration with respect to the third substrate are arranged at the symmetrical positions, and the second and fourth substrates 51 and 53 are arranged at the symmetrical positions. Work can be done easily.

  Further, in the first embodiment described above, the case where the object to be measured is arranged behind the rear seat of the vehicle 2 has been described. However, the present invention is not limited to this configuration, and for example, the object arranged ahead of the rear seat. A measurement object may be measured, or a measurement object placed in the engine room may be measured. Moreover, although the case where apparatuses other than the jigs 4 such as the PC 7 and the spectrum analyzer 6 are installed in the vehicle has been described, when a chassis dynamo is used, it may be configured outside the vehicle.

  Next, an electromagnetic wave measuring apparatus according to a second embodiment of the present invention will be described with reference to the drawings. In addition, the electromagnetic wave measuring apparatus of this 2nd Embodiment is aiming at size reduction, providing the function equivalent to the 1st electromagnetic wave measuring apparatus mentioned above.

  As shown in FIGS. 15 to 17, the electromagnetic wave measuring apparatus 100 according to the second embodiment includes four legs 101. The leg 101 protrudes downward from a corner on the lower surface of the apparatus main body 102, and a hemispherical contact portion 103 is attached to the lower end thereof. The length of the leg 101 is variable by driving the motor, and the height position of an electromagnetic field probe 104 to be described later is adjusted to an optimum position corresponding to the shape of the object to be measured (not shown). By configuring the contact portion 103 in a hemispherical shape, the relative position of the apparatus with respect to the object to be measured can be stably fixed even if the object to be measured has, for example, a step or distortion. Can do. Although the case where the contact portion 103 is formed in a hemispherical shape has been described, the present invention is not limited to this configuration. For example, a flange having a screw hole or the like is provided in place of the contact portion 103, and the flange is fixed to the screw. For example, it may be fixed to the object to be measured. When fixing in this way, the relative position of the apparatus with respect to the object to be measured can be easily fixed regardless of the installation angle of the object to be measured.

  As in the first embodiment, the apparatus main body 102 includes an array probe 105 including a plurality of electromagnetic field probes 104, and the array probe 105 and the movable part main body 106 constitute a movable part 107. A movable mechanism (not shown) that supports the movable portion 107 so as to be displaceable in the X-axis direction (the arrow direction in FIG. 16) along the longitudinal direction of the apparatus main body 102 is incorporated. As shown in FIG. 17, the movable unit 107 includes three electromagnetic field probes 104 arranged in a line along the width direction of the apparatus main body 102, and a laser pointer and an electromagnetic field probe are arranged in parallel with the electromagnetic field probes 104. A laser unit 108 that also serves as a height detector and a camera 109 that images the object to be measured are arranged. In addition, although the case where the laser unit 108 and the camera 109 are provided one by one has been described, the obstacle detection laser unit 45 of the first embodiment described above may be provided individually. Further, the obstacle detection laser unit 45 may be used also as the laser pointer 108 and the height detection laser unit 108. Similarly to the other examples of the first embodiment, the movable portion 107 may be configured to be displaceable in the Z-axis direction perpendicular to the X-axis direction, that is, the longitudinal direction of the leg portion 101 by a movable mechanism. .

  Similarly to the camera 42 of the first embodiment, the camera 109 constitutes a telecentric optical system, and this camera 42 has a telecentric imaging lens (not shown) that performs equal magnification projection with parallel light. The captured image data is output to the PC 7. With this telecentric imaging lens, a planar image in which the size of the object to be imaged does not change according to the distance from the telecentric imaging lens can be obtained.

  As shown in FIG. 15, an arithmetic unit 110 that controls the driving of the movable mechanism and calculates the intensity of the electromagnetic wave detected by the electromagnetic field probe 104 is arranged on the upper part of the apparatus main body 102 in one of the longitudinal directions. A handle 111 for carrying the device to the other side is attached.

  The calculation unit 110 includes a calculation device such as a microcomputer. The calculation unit 110 is integrally provided with a liquid crystal monitor 112 on its upper surface, and a touch panel 113 for performing operation input is provided on the upper surface of the liquid crystal monitor 112. As in the first embodiment described above, the calculation unit 110 controls the movement of the camera 109 by the movable unit 107, and connects the plurality of images captured at each movement location to obtain the entire image of the object to be measured. The entire image is created and displayed on the liquid crystal monitor 112. Although the case where the touch panel 113 is provided on the liquid crystal monitor 112 has been described, the present invention is not limited to the touch panel 113, and operation input means such as a keyboard and a pointing device may be provided.

Further, the calculation unit 110 has the function of the spectrum analyzer 6 in the first embodiment described above. For example, based on the detection result of the electromagnetic wave by the electromagnetic field probe 104, the calculation unit 110 calculates the electromagnetic wave for each frequency in a predetermined frequency band. Calculate the intensity. Then, data processing is performed based on the calculated intensity data and image, and the result of this data processing is an electromagnetic field intensity distribution in which the measured object is superimposed on the entire image of the measured object. Create a diagram.
The calculation unit 110 sets the optimum distance between the end of the electromagnetic wave probe 104 and the measured part based on the detection result of the laser unit 108 for height detection, and drives the motor (not shown) to perform the above-described operation. The length of the leg 101 is adjusted. Note that the length of the leg 101 may be changeable based on a manual numerical input. Here, the optimum distance between the end of the electromagnetic wave probe 104 and the object to be measured is, for example, within a range where the electromagnetic wave probe 104 does not contact the object to be measured when it is desired to increase the sensitivity of electromagnetic wave detection as much as possible. This is the interval when the electromagnetic wave probe 104 is closest to the object to be measured.

In addition, the calculation unit 110, as with the PC 7 of the first embodiment described above, varies the detection results of the plurality of electromagnetic field probes 104, more specifically, the three electromagnetic field probes 104. Correction is performed by a method of recording a difference from another electromagnetic field probe on the basis of a measurement value by the electromagnetic field probe.
Further, the calculation unit 110 includes a gyro sensor (not shown) that detects the tilt of the apparatus main body 102, and displays information on the detected tilt as a numerical value on the liquid crystal monitor 112. In addition to displaying the tilt information of the apparatus main body 102 on the liquid crystal monitor 112, for example, the tilt information may be displayed together with the coordinates of the current movable unit 107 in the XYZ axis directions, and further, the electromagnetic wave measurement may be performed. In order to ensure the reproducibility of the image, the inclination at the time of the previous or specified measurement is compared with the current inclination, and if they match, a message such as “OK” may be displayed on the liquid crystal monitor. .

  The electromagnetic wave measurement apparatus according to the second embodiment has the above-described configuration, and the electromagnetic wave measurement procedure performed by the electromagnetic wave measurement apparatus 100 will be described. However, the electromagnetic wave measurement apparatus 1 according to the above-described first embodiment is the same as that described above. Therefore, only the procedure different from that of the first embodiment will be described in detail, and the detailed description will be omitted with reference to the steps of FIG.

First, the contact portion 103 is pressed against the periphery of the object to be measured in a state where the power is turned on and the handle portion 111 is gripped. Then, the height between the object to be measured and the end portion of the electromagnetic wave probe 104 is measured by the laser unit 108, and the length of the leg portion 101 is automatically adjusted to the optimum length. Does not come into contact with the object to be measured. Here, when the object to be measured is a relatively flat object such as a substrate, the lower surface of the apparatus main body 102 is preferably as parallel as possible to the object to be measured.
Then, preparation for starting electromagnetic wave measurement via the touch panel 113 (imaging of an object to be measured by the camera 109, processing equivalent to steps S2 to S5 and S7) is performed. In the second embodiment, since the electromagnetic field probe 104 is displaced only in the X-axis direction, the pitch input is omitted.

  When the electromagnetic wave measurement is started, the movable portion 107 starts moving, and at the same time, detection of the electromagnetic wave by the array probe 105 is started. A detection result detected by the array probe 105 is output to the calculation unit 110. Then, in the calculation unit 110, based on the detection result of the array probe 105, the intensity analysis of the electromagnetic wave is performed for each frequency in the predetermined frequency band, and the intensity data subjected to the intensity analysis is combined with the entire image captured by the camera 109. To create an electromagnetic field strength distribution map.

  Next, a measurement end screen is displayed on the liquid crystal monitor 112 (processing in step S11), a region having the maximum intensity is extracted based on the user's operation input, and the movable unit 107 is moved to the maximum intensity measurement position. The laser unit 108 provided in 107 gives an instruction by irradiating the object to be measured with laser light (steps S12 and S13). Thereafter, interpolation processing is performed on the electromagnetic field intensity distribution map to obtain a smooth contour line intensity distribution map (contour diagram) (processing in step S14).

  Therefore, according to the above-described second embodiment, the electromagnetic wave measuring device can be integrated and miniaturized, so that electromagnetic waves of a plurality of different objects to be measured can be obtained while the vehicle is traveling. Measurement can be performed easily.

  In the first and second embodiments described above, the case in which the object to be measured is the control circuit board 3 has been described. However, the object to be measured is not limited to the control circuit board 3, and for example, an inverter, Electrical circuit components such as ECUs and harnesses may be measured.

  Furthermore, in the above-described first embodiment, the case where the cameras 42 and 109 are provided in the movable parts 35 and 107 of the electromagnetic wave measuring devices 1 and 100 has been described, but the telecentric image of the object to be measured by the cameras 42 and 109 is described. For example, the camera 42 may be provided separately from the movable portion 35. Further, the cameras 42 and 109 may be omitted from the electromagnetic wave measuring devices 1 and 100 as long as a telecentric image obtained by imaging the object to be measured with another camera in advance can be acquired.

1 is an overall configuration diagram of an electromagnetic wave measurement device according to a first embodiment of the present invention. It is a perspective view of the jig in the 1st Embodiment of this invention. It is a top view of the jig in the 1st embodiment of the present invention. It is a perspective view of the movable part in the 1st Embodiment of this invention. It is the arrow line view seen from the A direction in FIG. It is a conceptual diagram of the telecentric imaging lens of the camera in the 1st Embodiment of this invention. It is an electromagnetic field strength distribution map displayed on the display in the 1st Embodiment of this invention. It is explanatory drawing of the electromagnetic field intensity distribution figure in the 1st Embodiment of this invention. It is explanatory drawing of the electromagnetic field intensity distribution figure in the 1st Embodiment of this invention. It is a flowchart which shows the measurement procedure in the 1st Embodiment of this invention. It is explanatory drawing which shows the laser irradiation state in the 1st Embodiment of this invention. It is explanatory drawing of the movable part and to-be-measured object of the other Example in the 1st Embodiment of this invention. It is a graph which shows the relationship between the height h of an electromagnetic field probe and a to-be-measured object, and the intensity | strength of the measured electromagnetic field. It is a figure which shows the internal structure of the movable part of the further another Example in the 1st Embodiment of this invention. It is a perspective view of the electromagnetic wave measuring device in the 2nd Embodiment of this invention. It is the arrow view seen from the B direction in FIG. It is a perspective view of the movable part in the 2nd Embodiment of this invention. It is a figure which shows the image of the conventional to-be-measured object.

Explanation of symbols

3 Control circuit board (object to be measured)
4 Jig (movable mechanism)
6 Spectrum analyzer (processing means)
38 Electromagnetic field probe (electromagnetic wave detection means)
42 Camera (imaging means)
43 Telecentric imaging lens (Telecentric lens)
Display (display means)
102 Device body (movable mechanism)
104 Electromagnetic field probe (electromagnetic wave detection means)
109 Camera (imaging means)
110 arithmetic unit (processing means)
112 LCD monitor (display means)

Claims (6)

An electromagnetic wave measuring device including an electromagnetic wave detecting means capable of detecting an electromagnetic wave radiated from a measurement object mounted on a vehicle,
A movable mechanism for supporting the electromagnetic wave detection means so as to be movable at least in a predetermined first direction;
Processing means for calculating the intensity of the electromagnetic wave detected by the electromagnetic wave detection means in a predetermined frequency band;
Based on the intensity of the electromagnetic wave calculated by the processing means and the moving position of the electromagnetic wave detecting means by the movable mechanism, the electromagnetic wave intensity on the object to be measured on which the intensity of the electromagnetic wave equal to or higher than a predetermined intensity is detected. A specifying means for specifying the measurement position;
An electromagnetic wave measuring apparatus comprising: an instruction unit that indicates a measurement position specified by the specifying unit.   The electromagnetic wave measuring apparatus according to claim 1, wherein the instruction unit is supported by the movable mechanism.   The electromagnetic wave measuring apparatus according to claim 1, wherein the movable mechanism supports a plurality of electromagnetic wave measuring means, and the instruction means is arranged between two predetermined electromagnetic wave measuring means.   The electromagnetic wave measuring apparatus according to claim 3, wherein the instruction unit is disposed at a position surrounded by the plurality of electromagnetic wave measuring units.   The said movable mechanism is provided with the movable part which supports the said electromagnetic wave measurement means and an instruction | indication means, and is provided with the frame which supports this movable part so that a movement is possible. The electromagnetic wave measuring apparatus of description.   An obstacle detection means for detecting an obstacle that may come into contact with the electromagnetic wave detection means during the movement of the electromagnetic wave detection means, and when the obstacle is detected by the obstacle detection means, the movable mechanism The electromagnetic wave measuring apparatus according to claim 1, wherein movement of the electromagnetic wave detecting unit is stopped.

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