JP3113956B2 - Indoor electromagnetic environment measurement device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indoor electromagnetic environment measuring apparatus for three-dimensionally measuring an indoor electromagnetic environment using a mobile robot equipped with a measuring antenna.

[0002]

2. Description of the Related Art In recent years, accidents in which various electromagnetic interference waves, such as amateur radio and CB radio, and interference waves radiated from electronic devices and the like, cause malfunctions and destruction of electronic devices have increased. I have. In addition, a reduction in the immunity of an electronic device to electromagnetic interference accompanying an increase in the speed and power consumption of a semiconductor element has spurred this type of problem.

[0003] Electromagnetic interference, which causes a failure in electronic devices, is generated by various mechanisms, and its time distribution and the route of intrusion into the electronic device are uncertain and are often poor in reproducibility. Under such circumstances, attempts have been made to measure the indoor electromagnetic environment using a mobile measurement device.

FIG. 6 is a diagram showing an example of an apparatus for performing such a measurement, in which a room 1 to be measured is provided with a movement measuring section 2 on which an antenna 3 for measuring an electromagnetic environment is mounted.
The antenna 3 is connected to a control and measurement unit 4 by a cable 5, and the movement measurement unit 2 has a structure that can be moved by moving wheels 6. 7a is an interference wave source such as an air conditioner;
b is an interference wave source such as a fluorescent lamp, 7c is a power line serving as an interference wave source, 7d is an interference wave source such as a computer, and 10 is a communication line of the computer 7d.

FIG. 7 is a view showing the structure of the movement measuring unit 2 of FIG. 6, wherein 2a is a horizontal axis for moving the antenna 3 in the horizontal direction, and 2b is a vertical axis for moving the antenna 3 in the vertical direction.

FIG. 8 is a block diagram showing the electrical configuration of the apparatus shown in FIG. 6. The antenna 3 is connected to a measuring unit 4a for measuring electric and magnetic field strength such as a spectrum analyzer.
The position of the movement measurement unit 2 is detected by the position detection unit 4b, and the drive unit 4c drives the movement carriage 2 and the horizontal axis 2a and the vertical axis 2b. The control unit 43d
Controls the drive unit 4c, and the data processing device 4e controls the control unit 4c.
d, and processes the position signal and the electromagnetic environment signal transmitted from the position detection unit 4b and the measurement unit 4a. The data processed by the data processing device 4e is stored in the storage device 4f and displayed on the display device 4g as needed.

In the measurement, an electric field or a magnetic field of a disturbing wave source at that position is detected while moving the movement measuring unit 2 to the room 1 to be measured and moving the antenna 3 in the horizontal and vertical directions by the horizontal axis 2a and the vertical axis 2b. And antenna 3
The electromagnetic environment signal detected by the measuring unit 4a of the control measuring unit 4
Is measured by Then, the position data detected by the position detection unit 4b and the electromagnetic environment data from the measurement unit 4a are integrated by the data processing device 4e, stored in the storage device 4f, and displayed on the display device 4g.

[0008]

However, due to the recent diversification of wiring patterns inside buildings, it has been necessary to measure radiated radiated waves from floor wiring and radiated electromagnetic waves from wall wiring. However, in the conventional measuring device, the antenna cannot be moved to the floor or the vicinity of the wall due to the structure of the moving measuring unit. Therefore, there is a problem that the indoor electromagnetic environment including the vicinity of the floor surface and the vicinity of the wall surface cannot be accurately measured. In addition, since indoors often have desks, furniture, and the like that hinder movement of the measuring device, there is also a problem that it is difficult to measure the electromagnetic environment after the installation.

The present invention has been made in view of such a situation, and is intended to three-dimensionally measure an electromagnetic environment at any arbitrary indoor space position including a floor and a wall surface.

[0010]

SUMMARY OF THE INVENTION In order to solve such a problem, the present invention provides an antenna for detecting an electromagnetic field distribution in a room to be measured and a multi-joint for moving the antenna to an arbitrary point in the room. A robot arm unit, a movable trolley unit equipped with the robot arm unit, and a first position detecting unit and a movable trolley unit for detecting a relative three-dimensional position of the point mounted and moved on the robot arm unit from the movable trolley. A second position detector for measuring the position of the mounted mobile trolley on a two-dimensional plane, a measuring unit for measuring an electromagnetic field measured from an antenna, and a memory for storing an electromagnetic environment signal sent from the measuring unit Unit, a display unit for integrally displaying the electromagnetic environment signal and the position signal sent from the storage unit and the position detection unit, and a control unit for remotely controlling the robot arm unit and the movable trolley unit.

[0011]

A movable block section is constituted by a movable trolley 2d having an antenna 3 mounted on the tip of an articulated robot arm 2i capable of detecting an arbitrary spatial position and designating a spatial position. Move 3
This enables three-dimensional measurement of an indoor electromagnetic environment.

[0012]

FIG. 1 is a view showing an embodiment of the present invention, in which a moving block portion 8 movably mounted by a moving wheel 6 is placed in a room 1, and an antenna 3 is mounted on the moving block portion. 8 is attached via a robot arm 2c having a plurality of joints, the data obtained from the antenna 3 is processed by a moving block unit 8, and is sent to a measurement control unit 9 via a cable 5 such as an optical fiber cable. Supplied. The device configured in this way is the robot arm 2
By freely moving the plurality of joints c, the antenna 3 can be moved to any space including the vicinity of the wall surface in the room 1.

FIGS. 2A and 2B are views showing an embodiment of the moving block unit 8 in FIG. 1, wherein FIG. 2A is a front view and FIG. 2B is a side view. In the figure, a moving block unit 8 is mounted on a moving cart 2d which is movable by a moving wheel 6, and the moving block unit 8 is provided with a rotary shaft 2e to 2h provided with an encoder for detecting a rotation amount of an arm. A robot arm 2i composed of a plurality of arms rotatably supported at the portion is attached, and adjacent rotating shafts are connected to each other by a vertical holding belt 2j. Symbol 2
k and 21 are rotation axes for horizontal rotation provided with a horizontal encoder for detecting the horizontal rotation angle of the antenna 3 or the arm 2i.

FIG. 3 is a block diagram showing an electric configuration. A moving block unit 8 is mounted on a moving truck 2d, and measurement data and position data sent from the moving block unit 8 are processed by a measurement control unit 9. I have.

The moving block unit 8 includes an antenna 3, electric / optical converters 8a and 8b for converting an electric signal into an optical signal and outputting the same, a position detecting device 8c comprising encoders, and a position data sent from the position detecting device 8c. A position calculating device 8d for calculating and converting to three-dimensional rectangular coordinates, a driving device 8e for driving the moving wheels 6 and the arm rotating shafts 2e to 2h, and a control device for controlling the driving device 8e and controlling the antenna 3 to an arbitrary space. 8f, a transceiver 8g for transmitting and receiving signals between the moving block unit 8 and the measurement processing unit 4.

A measurement control unit 9 connected to the moving block unit 8 includes an optical / electrical converter 9a, a measuring device 9b such as an electric field (magnetic field) intensity meter or a spectrum analyzer for measuring electromagnetic environment measurement data, and an optical / electrical Converter 9c, transceiver 9
d, a computing device 9e, a storage device 9f, and a display device 9g.

Symbols 5a and 5b are optical fiber cables connecting the moving block section 8 and the measurement control section 9.

In the device configured as described above, the mobile trolley 2d is moved in the indoor plane by using the moving wheel 6, and the robot arm 2i for supporting the antenna is used to avoid indoor fixtures and the like to any indoor space. Support the antenna 3,
The antenna 3 is supported near the wall and floor.

The antenna vertical direction holding belt 2j
Thus, the electromagnetic environment at an arbitrary spatial position is measured while maintaining the polarization plane. For position detection, an encoder (not shown) attached to the moving wheel 6 of the moving cart 2d
Dimensional position is measured, and rotary shaft 2e with encoder for arm
2h and the horizontal rotation shafts 2k and 2l are used to measure the spatial position from the respective angle detection signals and the like.

An electric field or a magnetic field at an arbitrary space position in the room is detected by an antenna 3 supported by the antenna 3, and the electric / optical converter 8a and the optical fiber cable 5a are detected.
The electric field or the magnetic field at the position is measured by the signal supplied to the measurement control unit 9 via the.

The position data detected by the position detecting device 8c is calculated by the position calculating device 8d, and the signal transmitted through the transmitter / receiver 8g is converted into an optical signal by the electric / optical converter 8b. Is transmitted to the measurement control unit 9 using

In the transmitted data, the electromagnetic environment information and the position information are integrated and processed by the data processing calculation device 9e in association with the plane position, the spatial position information, and the intensity of the electromagnetic field, and the integrated data is stored in the storage device 9f. 9g displays the content based on the processing result. Thereafter, the data processing calculation device 9e sends a position movement command, and when it is transmitted to the movement block unit 8, the control device 8f controls the driving device 8e according to the received command, and moves the antenna 3 to the next position. I do.

As described above, according to the present invention, the electromagnetic environment can be measured without affecting the electromagnetic environment to be measured by performing the optical fiber cable transmission. By using a resistive coaxial cable, an optical / electrical converter is not required, and the moving block unit 9 can be made lightweight.

Further, by using wireless transmission, restrictions on the movement of the moving block unit 8 can be reduced. In addition,
Although the present embodiment has shown that a series of operations are performed automatically, it is apparent that the same effect can be obtained even if the operator manually performs the control part.

FIG. 4 shows another embodiment of a robot arm 2i using a cylindrical coordinate type arm.
m, a vertical movement axis 2n, a rotation arm 2p, and a polarization plane maintaining rotation axis 2q. It is. The antenna 3 can be supported in a circle determined by the rotation direction axis 2m and the rotation arm 2p, and can be moved in a cylindrical plane in combination with the vertical movement axis 2m.

[0026] Then, the movable carriage not shown in FIG.
It can move in a dimensional space. By using this configuration, the positioning accuracy in the height direction is improved.
The rotary arm 2p may have a telescopic structure, and the degree of freedom of positioning the antenna is improved without moving the movable cart.

Similarly, the rotary arm 2p may have a two-link structure, which improves the degree of freedom in positioning the measurement antenna without moving the movable carriage.

FIG. 5 shows still another embodiment of the robot arm 2i, a slider 2s with an arm which moves on a vertical movement axis 2r, a horizontal movement axis 2t attached to the slider 2s, and a horizontal movement axis 2t. Is moved from the slider 2u. By using this configuration,
Since the position detection is obtained by the rectangular coordinates, the detection accuracy is improved.

[0029]

As described above, according to the present invention, since the antenna is mounted on the articulated arm, it can be moved to an arbitrary field by avoiding an obstacle such as a desk. This has the effect that the electromagnetic environment can be measured in association with the dimensional position.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the structure of an embodiment of the present invention.

FIG. 2 is a view showing a detailed structure of an arm unit in FIG. 1;

FIG. 3 is a block diagram of an apparatus for processing data.

FIG. 4 is a perspective view showing many examples of an antenna mounting portion.

FIG. 5 is a perspective view showing many examples of an antenna mounting portion.

FIG. 6 is a perspective view showing an example of a conventional device.

FIG. 7 is a diagram showing an example of a conventional antenna.

FIG. 8 is a block diagram showing the configuration of a conventional device.

[Explanation of symbols]

 Reference Signs List 1 Room to be measured 2 Movement measurement unit 2a Horizontal axis 2b Vertical axis 2c Robot arm 2d Moving cart 2e to 2h Rotation axis 2i Arm 2j Belt 2k, 2l Horizontal rotation axis 2m Rotation direction movement axis 2n Vertical direction movement axis 2p Rotation Arm 2q Rotation axis for maintaining polarization plane 2r Vertical movement axis 2s Slider with arm 2t Horizontal movement axis 3 Antenna for measuring electromagnetic environment 4 Control measurement section 4a Measurement section 4b Position detection section 4c Drive section 4d Control section 4e Data processing apparatus 4f Storage device 4g Display device 5 Cable 6 Wheel for movement 7a, 7b, 7c, 7d Disturbing wave source 8 Moving block 8a, 8b Electric / optical converter 9a, 9c Optical / electric converter 8c Position detecting device 8d Position calculating device 8e Drive Device 8f Controller 8g, 9d Transceiver 9 Measurement controller 9b Measurement device 9d Transmission Receiver 9e Computing device 9f Storage device 10 Communication line

──────────────────────────────────────────────────続 き Continued on the front page (56) References Material of the Institute of Electrical Engineers of Japan Vol. IM-87, no. 37-42, pp. 29-36, 1987 (58) Field surveyed (Int. Cl. ⁷ , DB name) G01R 29/08

Claims (1)

(57) [Claims] 1. An indoor electromagnetic environment measuring apparatus for measuring an indoor electromagnetic environment, comprising: an antenna for detecting an indoor electromagnetic field distribution to be measured; and an articulated robot arm unit for moving the antenna to an arbitrary point indoors. A mobile trolley on which the robot arm is mounted, a first position detector for detecting a relative three-dimensional position of the point mounted on the robot arm and moved from the mobile trolley, and the mobile trolley A second position detection unit that measures a position on the two-dimensional plane of the mobile trolley mounted on the vehicle, a measurement unit that measures an electromagnetic field measured from the antenna, and an electromagnetic environment signal transmitted from the measurement unit A display unit that displays a detection result based on an electromagnetic environment signal and a position signal sent from the storage unit and the position detection unit; and the robot arm unit. Indoor electromagnetic environment measuring apparatus characterized by constituting a control unit for controlling the pre said mobile carriage unit.