JP2002062325A - Radio wave intensity measuring apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio wave intensity measuring apparatus at a lower cost, which improves the measurement efficiency by enabling fine movement of a probe inside a pseudo-biomedical part using a simple structure. SOLUTION: An pseudo-biomedical part 10, having a phantom 14 with a dielectric constant and a magnetic induction rate equal to that of a living being, is arranged in a vessel 12 simulating a living being, such as human body and a probe 22 which has a body 1 of a cellular phone fixed on the pseudo- biomedical part 10 to be inserted into the pseudo-biomedical part 10 which is held with a human hand 2 is installed to measure the intensity of an electric field in the pseudo-biomedical part 10 being moved during the generation of radio waves in the body 1. A detection part, comprising first and second means 32 and 34, is provided to be disposed on the perimeter of the pseudo-biomedical part 10 and detects the position of the probe 22 from a plurality of images, which are photographed from two directions (x and y-axes) orthogonal to each other toward the inside of the pseudo-biomedical part 10 and undergo an image processing on coordinates.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio wave intensity measuring device, and more particularly, to a method of measuring the absorption power (SAR) of an electromagnetic wave when a human body is exposed to an electromagnetic wave generated from an electromagnetic wave generator such as a portable telephone. The present invention relates to a radio field intensity measurement device for measuring.

[0002]

2. Description of the Related Art In recent years, with the rapid spread of mobile communication terminals such as portable telephones, SAR (Speci?
fic Absorption Rate) evaluation is desired. The SAR is a specific absorption rate as a time absorption rate of the energy of the electromagnetic wave applied to a specific portion of the human body, and the absorption power when the human body is exposed to the electromagnetic wave is represented by a value per unit mass (W / Kg). It represents. And S
Currently, the AR evaluation includes evaluation of simulation (FTDT or the like) performed by numerical analysis and dodimetric assessment (hereinafter, referred to as radiation dose evaluation) of measuring an electric field by actual measurement.

[0003] In this radiation dose evaluation, for example, the SAR can be measured by a radio field intensity measurement device developed by Dr. Neil Kuster of the Swiss Federal Institute of Technology (ETH). This conventional radio wave intensity measurement device uses a transparent liquid phantom with a dielectric constant and magnetic attraction that simulate the human body that is almost the same. A structure is provided for measuring the electric field strength in the living body. FIG. 4 is a configuration diagram showing a conventional radio field intensity measurement device used for SAR evaluation of such a mobile phone.

As shown in FIG. 4, a conventional radio wave intensity measuring device used for SAR evaluation of a mobile phone is a transparent liquid phantom having a body 1 of the mobile phone fixed and having a dielectric constant and a magnetic attraction coefficient substantially equal to those of a human body. A living body 10 in which a container 14 is stored in a container 12 and a probe 5 which is inserted into the living body 10 and moves in the phantom 14 to measure the electric field intensity
2, an industrial robot 58 that grips the probe 52 and moves the probe 52 in the living body 10, and a movable control unit 50 such as a personal computer that controls the operation of the robot 58.

[0005] Here, the living body part 10 comprises a container 12 formed in a shape imitating the head of a human body, and a transparent gel accommodated in the container 12 and having the same dielectric constant and magnetic attraction as the head of the human body. And a phantom 14 made of a liquid in a liquid state. In the living body 10, the main body 1 of the mobile phone is fixed outside the container 12, and the probe 52 is gripped by the robot 58 and the end is immersed in the phantom 14.

The probe 52 is formed in an elongated rod shape, and is formed of, for example, a sensor such as a small dipole antenna, and is formed so as to be able to measure the electric field intensity in the living body part 10 during radio wave irradiation. I have. The probe 52 detects a position where the electric field intensity is highest in the living body 10 by being gripped by the robot 58 and moving within the container 12 when a radio wave of the mobile phone is generated. The probe 52 is electrically connected to the movable control unit 50, and transmits a measurement result measured in the living body unit 10 to the movable control unit 50. Therefore, the probe 52 is
The position where the electric field strength becomes strong is measured in the
By transmitting the measurement result to the mobile phone, it becomes possible to simulate the position where the electric field strength becomes strong in the human head when the mobile phone generates a radio wave.

[0007] The movable control unit 50 is formed by a device such as a personal computer, and includes a keyboard 54 for inputting predetermined information and a monitor 56 for displaying predetermined information. The movable control unit 50 includes a probe 52 and a robot 5
8 are electrically connected to each other, and operate the robot 58 in accordance with the input information from the keyboard 54 to operate the probe 52.
Is moved to a predetermined position in the living body part 10, and the result of measurement by the probe 52 is displayed on the monitor 56 to simulate the position where the electric field intensity becomes strong.

The robot 58 holds one end of the probe 52 so as to be substantially parallel to the vertical z-axis shown in FIG. 4 and immerses the other end in the phantom 14 of the living body 10. It is formed to operate. The robot 58 operates under the control of the movable control unit 50 described above, and operates in the vertical z-axis and horizontal xy directions shown in FIG.
It moves according to three axial directions. Although not shown, the robot 58 is provided with sensing means such as a surface detection sensor electrically connected to the movable control unit 50 so as to confirm the position and operate.

[0009] The SA of the portable telephone having such a configuration
When using a conventional radio field intensity measurement device used for R evaluation, as shown in FIG. 4, a phantom 14 is stored in a container 12 of the living body 10 and the main body 1 of the mobile phone is placed outside the container 12. At the same time, the robot 58 holds one end of the probe 52 and immerses the other end in the phantom 14 of the living body 10. Then, the main body 1 of the mobile phone
The robot 58 is moved along three directions of the z-axis in the vertical direction and the x and y-axes in the horizontal direction under the control of the movable control unit 50.
The position where the electric field strength becomes maximum within 0 is measured. At this time, the movable control unit 50 receives the measurement result from the probe 52 and displays the measurement result on the coordinates of the monitor 56 so that the position where the electric field strength is highest in the human head is simulated. Becomes possible.

As described above, the conventional radio wave intensity measuring device sets and recognizes the position of the probe 52 moving in the simulated living body 10 using the robot 58, and measures the electric field intensity at that position. In addition, the position where the electric field strength is highest in the human head when a mobile phone generates a radio wave is analyzed.

[0011]

However, in the conventional radio field intensity measuring device, as shown in FIG.
When the probe 52 is moved to a predetermined position within 0, the robot 52 is moved using an industrial robot 58, so that the cost of the robot 58 itself is high and the entire apparatus becomes expensive. Further, in the conventional radio wave intensity measuring apparatus, as described above, since the robot 58 moves the probe 52, it is difficult for the robot 58 to finely move the probe 52 in the living body 10 according to the will of the measurer. In addition, the measurement position of the probe 52 cannot be finely adjusted in the living body portion 10, and there is a problem that it is difficult to perform a fine measurement quickly. Further, in the conventional radio field intensity measuring device, the robot 58 shown in FIG.
Move only along the x, y, and z directions, for example,
Since the robot cannot move in an oblique direction or the like, the operation speed of moving to a predetermined position becomes slow, and there is a problem in that measurement time is increased and work efficiency in the measurement process is reduced. An object of the present invention is to provide a low-cost radio field intensity measuring apparatus which solves such a problem and can move a probe finely in a simulated living body part with a simple structure, and improves measurement efficiency.

[0012]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a simulated living body part having the same dielectric constant and magnetic attraction to a living body such as a human body, and an electromagnetic wave generator fixed to the living body part. A body, a probe that is inserted into the living body part, moves when an electromagnetic wave generator generates radio waves, and measures electric field strength in the living body part, and at least two probes arranged around the living body part and orthogonal to each other toward the living body part. A detection unit that detects the position of the probe by using a plurality of images that are photographed from the direction and image-processed on the coordinates. Here, the detection unit arranges two video cameras that photograph the inside of the living body from two directions perpendicular to each other in the horizontal direction with the probe inserted in the living body from the upper part in a substantially vertical direction as a center. Preferably, the two images are image-processed on the coordinates and displayed. In addition, it is preferable that the probe be supported by either the hand or the stand of the human body, be inserted into the living body part, and move to detect a position where the electric field intensity is strongest. In addition, the stand grips the probe and inserts it into the living body in a substantially vertical direction from above, and then fixes this vertical operation to enable horizontal operation.
It is preferable that the probe is formed so that the probe can move in the living body part and detect a position where the electric field intensity is strongest. Further, it is preferable that the living body is formed by storing a gel-like liquid having the same value of permittivity and magnetic attraction to a living body such as a human body in a predetermined container. Further, the electromagnetic wave generator is preferably a mobile telephone such as a PHS telephone and a mobile telephone.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a radio field intensity measuring apparatus according to the present invention. FIG. 1 is a configuration diagram showing an embodiment of a radio wave intensity measuring device according to the present invention. FIG. 2 is a diagram showing images of the first camera 32 and the second camera 34 shown in FIG. 1. FIG. 2A shows an image of the first camera 32 and FIG.
Indicates images of the second camera 34, respectively. Here, the living body part 10 and the main body 1 shown in FIG. 1 are the same as the living body part and the main body of the prior art shown in FIG. 4, and the same components are denoted by the same reference numerals.

As shown in FIG. 1, an embodiment of a radio wave intensity measuring apparatus according to the present invention is used for SAR evaluation of a portable telephone as in the prior art shown in FIG. The phantom 14 is a transparent gel-like liquid that is fixed and has a dielectric constant and a magnetic attraction rate substantially equal to those of a human body.
And a living body part 10 storing the
A probe 22 that is inserted into the phantom and moves in the phantom 14 to measure the electric field strength, and a movable control unit 20 that receives a detection result from the probe 22 and displays it on a monitor 26 to analyze the electric field strength in the living body 10. And The embodiment of the radio field intensity measuring apparatus according to the present invention is different from the prior art shown in FIG. 4 in that the probe 22 is gripped and moved by the human hand 2 and two probes are provided around the living body 10. A first camera 32 and a second camera 34, which are video cameras, are provided.

Here, similarly to the prior art shown in FIG. 4, the living body part 10 includes a container 12 formed in a shape imitating the head of a human body, The phantom 14 is made of a transparent gel-like liquid having the same dielectric constant and magnetic attraction. The living body 10 is formed so that the main body 1 of the mobile phone can be fixed outside the container 12.

The probe 22 is formed in an elongated rod shape, for example, comprises a sensor such as a small dipole antenna, and is formed so as to be able to measure the electric field intensity in the living body 10 at the time of radio wave irradiation. I have. The probe 22 is electrically connected to the movable control unit 20, and transmits a measurement result measured in the living body unit 10 to the movable control unit 20.
Send to Further, unlike the prior art shown in FIG. 4, the probe 22 can be freely moved in the living body 10 by being gripped by the human hand 2,
The position where the electric field strength becomes maximum within 0 is measured. Therefore, unlike the prior art robot shown in FIG. 4, the probe 22 can be freely moved without having to move along the vertical z axis and the horizontal x and y axes.

At this time, the position of the probe 22 is
The setting and recognition are performed by a first camera 32 and a second camera 34 including two video cameras arranged around 0. The first camera 32 and the second camera 34 are arranged in two directions of an x-axis and a y-axis, which are orthogonal to each other in the horizontal direction, with the probe 22 inserted into the living body part 10 substantially parallel to the z-axis in the vertical direction. From the inside of the living body 10. The first camera 32 includes a vertical probe 2
An image of the interior of the living body 10 is taken in the y-axis direction shown in FIG. 1 which is horizontal with respect to 2, and an xz coordinate plane is displayed as shown in FIG. On the other hand, the second camera 34 photographs the inside of the living body 10 in the horizontal x-axis direction shown in FIG. 1, and displays the yz coordinate plane as shown in FIG. 2B.

Further, the probe 22 is provided with the mark A shown in FIG.
Based on the mark A, as shown in FIG.
2. Set and recognize position 2. That is, the probe 22
In the xz coordinate plane shown in FIG. 2A, the measurement position of the mark A is at a predetermined position (x1, z1). In the probe 22, the measurement position of the mark A is at a predetermined position (y1, z1) on the yz coordinate plane shown in FIG. Therefore, the probe 22 is connected to the first camera 3 by the mark A.
The measurement position (x1, y1, z1) in the living body 10 can be set and recognized based on the position information of the second and second cameras 34. Therefore, in the present embodiment, the probe 22
Measures the position in the living body 10 where the electric field strength becomes strong, sets and recognizes the position based on the images from the first camera 32 and the second camera 34, and inputs the position information to the movable control unit 20, thereby obtaining the mobile phone. It is possible to simulate the position where the electric field strength becomes strong in the human head when the radio wave is generated.

The movable control section 20 is formed by a device such as a personal computer, and includes a keyboard 24 for inputting predetermined information and a monitor 26 for displaying predetermined information. As described above, the movable control unit 20 is electrically connected to the probe 22, receives a measurement result measured by the probe 22 in the living body unit 10, and displays the measurement result on the monitor 26. At this time, unlike the prior art shown in FIG. 4, the movable control unit 20 recognizes the measurement position by the probe 22 based on the images by the first camera 32 and the second camera 34 described above, Based on the measurement result, the position where the electric field strength becomes strong in the human head is simulated.

When the embodiment of the radio wave intensity measuring apparatus according to the present invention having such a configuration is used, a phantom 14 is stored in a container 12 of a living body 10 as shown in FIG. The body 1 of the mobile phone is fixed to the outside of the mobile phone 12. Thereafter, a radio wave is generated from the main body 1 of the mobile phone in the living body 10, the probe 22 is gripped by the human hand 2, the other end is immersed in the phantom 14, and is moved in a predetermined direction. Measure strength. At this time, the first camera 32 and the second camera 34 confirm the measurement position corresponding to the measurement result of the probe 22 by using the image shown in FIG. Then, the movable control unit 20
Based on the measurement positions of the camera 32 and the second camera 34 and the measurement result of the probe 22, the position where the electric field strength is highest in the human head when the mobile phone generates a radio wave is simulated.

As described above, according to the embodiment of the radio wave intensity measuring apparatus of the present invention, as shown in FIG. Because of the structure in which the measurement position of the probe 22 is confirmed by the first camera 32 and the second camera 34, FIG.
Probe 2 in the living body part 10 as compared with the robot shown in FIG.
2 can be moved and the measurement position can be confirmed at low cost, and the cost of the entire apparatus can be reduced.

Further, according to the embodiment of the radio wave intensity measuring apparatus according to the present invention, as described above, the probe 22 is grasped by the human hand 2 and is moved in the living body 10 so that the probe 22 is moved in the living body 10. The probe 22 can be finely moved inside the living body 10, and the measurement position of the probe 22 can be finely adjusted in the living body 10, thereby enabling fine measurement. Further, according to the embodiment of the radio wave intensity measuring apparatus according to the present invention, the probe 2
2 can be freely moved in the living body part 10 by grasping it with the human hand 2, the operation speed of moving the probe 22 to a predetermined position is increased, the measurement time can be shortened, and the work efficiency in the measurement process can be reduced. Can be improved.

Here, the embodiment in which the probe 22 is moved in the living body portion 10 by grasping the probe 22 with the human hand 2 has been described. However, the present invention is not limited to this. For example, the probe is supported on a predetermined stand. It is also possible to move inside the living body part. FIG. 3 is a configuration diagram showing another embodiment of the radio field intensity measuring device according to the present invention using such a stand. Here, the radio wave intensity measuring device shown in FIG. 3 is the same as the radio wave intensity measuring device shown in FIG. 1 except for the stand 40, and the same components are denoted by the same reference numerals and are duplicated. Description is omitted.

As shown in FIG. 3, another embodiment of the radio field intensity measuring apparatus according to the present invention is used for SAR evaluation of a mobile phone like the radio field intensity measuring apparatus shown in FIG. A body part 10 in which a phantom 14 which is a transparent gel-like liquid having a dielectric constant and a magnetic attraction coefficient substantially equal to that of a human body is stored in a container 12, and a phantom is inserted into the body part 10 by fixing the phantom. A probe 22 for measuring the electric field strength by moving inside the probe 14;
And displays on the monitor 26 the detection result from the
A movable control unit 20 for analyzing the electric field strength in the living body, and a living body unit 10
, A first camera 32 and a second camera 34, which are two video cameras arranged around the camera. Further, another embodiment of the radio field intensity measuring device according to the present invention is different from the radio field intensity measuring device shown in FIG.

Here, the stand 40 is elongated in a bar shape and installed in a state of being extended in the vertical direction (z-axis direction), and the stand 40 is arranged in a horizontal direction (x, y-axis directions) orthogonal to the support table 42. And an arm portion 44 attached so as to be able to expand and contract toward. The arm portion 44 is formed so that the probe 22 can be vertically attached to and detached from a free end that expands and contracts. In addition, the stand 40 is formed such that the receiving table 42 rotates while supporting the arm 44. That is, the stand 40 holds the probe 22 and
After the probe 22 is inserted in the vertical direction from the top in the vertical direction, the movement in the vertical direction (z-axis direction) is fixed, and the probe 22 moves freely in the horizontal direction. Can be measured. Therefore, the movable control unit 2
0 is the probe 2 confirmed by the first camera 32 and the second camera 34 in the same manner as the radio field intensity measurement device shown in FIG.
Based on the measurement position at the mark 2 and the measurement result measured by the probe 22, it is possible to simulate the position where the electric field strength is highest in the human head when the mobile phone generates a radio wave. .

As described above, according to another embodiment of the radio field intensity measuring apparatus according to the present invention, the probe 22 can be freely moved by the stand 40, so that the same effect as that of the radio field intensity measuring apparatus shown in FIG. 1 can be obtained. While being able to
By moving the probe 22 by the stand 40,
The probe 22 can be moved to a more accurate position for measurement as compared to the radio field intensity measurement device shown in FIG.

Although the embodiment of the radio wave intensity measuring apparatus according to the present invention has been described in detail, the present invention is not limited to the above-described embodiment, and can be changed without departing from the gist of the present invention. . For example, the embodiment of the radio wave intensity measuring apparatus according to the present invention used for SAR evaluation of a mobile phone has been described, but the present invention is not limited to this.
It can also be used for SAR evaluation of mobile telephones such as telephones.

[0028]

As described above, according to the radio wave intensity measuring apparatus of the present invention, the probe is grasped by the human hand, moved in the living body part, and the probe measuring position is detected by the detecting unit (first camera and second camera). , The movement of the probe and the confirmation of the measurement position can be realized at low cost, and the cost of the entire apparatus can be reduced. Further, according to the radio wave intensity measuring apparatus of the present invention, the probe can be finely moved in the living body part according to the will of the measurer because the probe is moved in the living body part by grasping the probe with a human hand as described above. In addition, the measurement position of the probe can be finely adjusted in the living body, thereby enabling fine measurement. Further, according to the embodiment of the radio wave intensity measuring apparatus according to the present invention, the probe can be freely moved in the living body by holding the probe with a human hand, so that the operation speed of moving the probe to a predetermined position is increased. In addition, the measurement time can be reduced, and the work efficiency in the measurement process can be improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of a radio wave intensity measuring device according to the present invention.

FIG. 2 is a view showing images of a first camera and a second camera shown in FIG. 1;

FIG. 3 is a configuration diagram showing another embodiment of the radio wave intensity measuring device according to the present invention.

FIG. 4 is a configuration diagram showing a conventional radio field intensity measurement device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 hands 10 Biological part 12 Container 14 Phantom 20 Movable control part 22 Probe 24 Keyboard 26 Monitor 32 First camera 34 Second camera

Claims (6)

[Claims] 1. A simulated living body part having the same dielectric constant and magnetic attraction as a living body such as a human body, an electromagnetic wave generator fixed to the living body part, and a radio wave of the electromagnetic wave generator inserted into the living body part A probe that is moved at the time of occurrence to measure an electric field intensity in the living body part; and a probe that is arranged around the living body part and is photographed from at least two directions orthogonal to each other toward the living body part and image-processed on coordinates. A detection unit for detecting the position of the probe based on the plurality of images. 2. The radio field intensity measurement apparatus according to claim 1, wherein the detection unit is orthogonal to each other in a horizontal direction with the probe inserted into the living body unit from above in a substantially vertical direction (z direction). Radio field intensity measurement, wherein two video cameras for photographing the inside of the living body from two directions (x, y directions) are arranged, and two images of the video cameras are image-processed on coordinates and displayed. apparatus. 3. The radio wave intensity measuring apparatus according to claim 1, wherein the probe is supported by one of a human hand and a stand, and inserted into the living body to move, so that the electric field intensity is highest. A radio field intensity measuring device for detecting a position. 4. The radio wave intensity measuring apparatus according to claim 3, wherein the stand grips the probe and inserts the probe into the living body in a substantially vertical direction (z direction) from above, and then moves the stand in the vertical direction. The probe is formed so that the probe can move in the living body part and detect a position where the electric field intensity is strongest by allowing the probe to move in the horizontal direction (x, y directions). Strength measuring device. 5. The radio wave intensity measuring device according to claim 1, wherein the living body is filled with a gel-like liquid having a value that is equal to the permittivity and the magnetic attraction to a living body such as a human body in a predetermined container. A radio field intensity measuring device characterized by being stored and formed. 6. The radio wave intensity measuring device according to claim 1, wherein the electromagnetic wave generator is a mobile telephone such as a PHS telephone or a mobile telephone.