JPS59133473A - Antenna supporting device - Google Patents

Abstract

PURPOSE:To improve the accuracy of an EMC test and save the labor required for it by supporting plural antennas and moving them in specific sequence. CONSTITUTION:Antennas should be moved variously or replaced in the EMC test. For this purpose, a control program is stored in a storage device 6 and a CPU7 controls the antennas. Necessary instructions are transmitted from the CPU7 to control parts 19 and 20 of a turntable 13 and antenna frames 14 through an input/output interface 9, optical modem 11, and optical fiber 12 to set the turntable and antenna frames at initial positions. The movement and rotation of the antennas are all controlled on the basis of those initially set points after the initial setting, so it can omit the labor necessary for measuring the positions of the antennas and a body 3 to be tested.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is an antenna support device used for electromagnetic compatibility (hereinafter referred to as "EMC") testing of electronic equipment, which supports a plurality of antennas and can move them in a predetermined sequence. , proposes a simple antenna support device that improves the accuracy of the EMC test and saves labor.

In the KMC test, the radiated interference noise of the electronic device under test is measured (hereinafter referred to as the "RE test"), and radio waves are applied to the test object to confirm that there are no errors in its operation (hereinafter referred to as R8). There is a test (called "examination").

These RE and Re tests require the use of an antenna to receive or transmit radio waves.

Equipment for supporting and moving this antenna is commonly used in 1MC testing.

First, a conventional antenna support device will be briefly explained.

Figure 1 shows the configuration of a conventional Yuzu device.

In the figure, (1) is an antenna that emits or receives radio waves, and +21 is an antenna support device that supports the antenna!
(For example, a wooden tripod, etc.), +31 is the test piece, (4) is the test piece mentioned above, and 1. There is also a metal plate-shaped base plate that is grounded, and (5) is a stand that supports the base plate (4).

In such a configuration, for example, when attempting to measure the radiated interference noise (hereinafter referred to as "REJ") generated from the specimen (31), the antenna (1) is attached to the antenna support device (2).
1, and these were placed at the same location at a distance of about 1 m from the specimen (3). Further, when a plurality of antennas (1) must be used, the work of removing and attaching antenna +11 from antenna support device +21 is repeated.

As described above, in the conventional antenna support device (21), attachment, detachment, movement, etc. of the antenna (1) were performed manually.

However, in the 1MC test, it is necessary to move the antenna +11 variously and to replace it.

The reason for this is that the 1MC test is conducted in a shielded room with magnetic shielding, and there are electric and magnetic standing waves inside this shielded room, which cause measurement errors. 11 in a shielded room to measure the standing waves, and the test specimen (3
) The electromagnetic waves radiated from the specimen (31 and antenna +1
Since the antenna (11) differs depending on the positional relationship with the specimen (3),
1, find the maximum value point of the radiated electromagnetic waves, and set antenna +11 at that position, and furthermore, the frequency range of antenna (1) is within the frequency range handled in the 1MC test (usually 10kHz to 40GHz). Since the area is not wide enough to cover the area, multiple antennas 111 with different frequency bands are prepared.

This is due to the need to replace these according to the measurement frequency.

As explained above, with the conventional antenna support device (21), the antenna Il+ was manually moved and replaced, but in this case, the measurement efficiency was poor, and the Re test was performed using a high electromagnetic field (for example, 10 V). /m to 50 V/m) was radiated from the antenna +11, which was harmful to the human body.

The harm caused by high-frequency electromagnetic fields to the human body is that the dielectric effect caused by high-frequency electromagnetic fields heats and destroys human tissues, and it is also known that there may be transmissible effects.

For the above reasons, there has been a desire for an antenna support 4tm that can automate the handling of the antenna port 1 and allow accurate testing.

The present invention solves the problems with the conventional antenna support device and provides an automated antenna support device with a simple configuration, which will be described in detail below with reference to the drawings.

An embodiment of the present invention is shown in FIGS. 2 to 5.

Fig. 2 is a block diagram of an embodiment of the present invention, Fig. 3 is a block diagram of the rotary table and antenna mount, Fig. 4 is a diagram showing the positional relationship between the rotary table and the antenna mount, and Fig. 5 is a flowchart of processing. It is.

In the figure, 111. +31 and (4) are the same as in FIG. (6) is a storage device that stores processing programs and data.

+71 is a central processing unit xt (hereinafter referred to as CPU) that performs calculations and processes according to the above processing program, ts+ is an input device (for example, a keyboard) that provides information to the CPU (7), (91 is a CPU (input 71) An input/output interface that relays the device (8), the output display device O1, the optical modem a11., and the receiver 151, Ql is the output display device, and Qll inputs and outputs command signals and measurement data that are input and output to the cpU (7). The rotary table control unit (19, antenna mount control unit (a) and the specimen (19) are connected via the interface (91).
3) is a well-known optical modem that performs optical transmission between. O2 is an optical fiber, a cable 03, which is connected between the optical modems 011 and between the rotary table control unit ATA and the antenna mount control unit, and serves as an optical signal transmission path.
041 is the antenna mount that supports the antenna (!1 and rotates or moves it); O5 is the RE received by antenna +11; A61 is an RF cable that connects antenna +11 and receiver f+51 and serves as a transmission path for high frequency signals (hereinafter referred to as RF), and u7 is a receiver that measures
1 is a signal line that transmits input/output signals, il, s, etc. of the E body +31, On is a grounding line that grounds the above ground plate (41), (1g is a signal line that transmits input/output signals, il, s, etc. of the E body +31,
An antenna mount control section that controls the horizontal drive section +241 and the rotation drive section □□□ of the vertical drive section of (21 is the antenna mount 04).

All are rotary table drive parts 1. which rotate the table by driving the rotary shaft; ＠ is connected to the rotating shaft (A), and the table that carries the base plate (4) and the specimen (31) is rotated in h1, @ is the 1-turn drive unit to move the antenna (1) vertically - and the pillar □□□ attached to and along the pillars.

It is a vertical drive unit that moves in the vertical direction and is composed of, for example, a linear motor. In order to move the antenna (11) horizontally, it was attached to the rail ■ and the pillar.

This is a horizontal drive unit that runs on rails and is composed of, for example, a known linear motor. (c) is a rotary drive unit that rotates the antenna (11), which is composed of, for example, a DC pulse motor. 1!# (for example, a battery), which supplies power to the vertical drive section (goods) and the rotational drive section (a), (5) is mounted perpendicularly to the rail ■, and the vertical drive section Z1 rotation drive section (goods) and the pillar that supports the antenna (1), @ is the rail that guides the horizontal movement of the pillar, a is installed near the rotation axis (to), and the specimen (
A slip ring that relays the input/output signal line surface of 31 and the ground wire brocade that grounds the ground plate T41 to the outside when the table is rotating is connected to the rotary table drive unit q), and its rotation This is the rotating shaft that transmits motion to the table device.

Next, the operation of an embodiment of the present invention will be explained using FIGS. 2 to 5. It is shown here for convenience of explanation.

The explanation will be limited to the RIIC test.

A control program is stored in the storage device (6) in advance, and when the CPU (7) starts operating according to this control program, the type of antenna, horizontal scan, and rotation of the vertical scan turntable are determined at A in Fig. 5. Information necessary for control, such as direction and speed, is stored in the storage device (6) from the input device ft1s+ via the input/output interface (91).

Also, at the same time as being stored, it is displayed on the output display device [111] via the input/output interface (9).

Next, at B in Figure 5, in order to initialize, that is, set the rotary table and antenna pedestal to their initial positions, the necessary commands are sent from the CPU (71) to the input/output interface (91, optical modem A1, and optical fiber cable). is rotating table 1I31
and each part of the antenna mount 041, that is, the rotary table control unit 09. The transmission is transmitted to the antenna mount control section.

After receiving the initial setting command, the rotary table control unit (IlJ is the rotary table drive unit Cl1l), the table 71 and the main plate (4)
Then, the specimen (3) is rotated and stopped at a predetermined position. Furthermore, the ends of the antenna mount control section are the vertical drive section (c), horizontal drive section (to), and rotation drive section 12 of the antenna mount I! il
Drive.

The antenna (1) is set in a predetermined positional relationship with respect to the specimen (3). The predetermined position here means the origin in control, and all subsequent movements and rotations are controlled as changes from this origin. This saves the effort of measuring the positions of the antenna c 萱1 and the specimen (3).

Next, at C in FIG. 5, it is selected which of the small antenna stands α located at the positions Xl, X2°Yl, and Y2 in FIG. 4 is to be driven. This corresponds to selecting the antenna to be used depending on which frequency band the EMC test is to be performed. Here, a predetermined antenna mount I is selected by the CPU (71) via the input/output interface (9).The subsequent command transmission is the same as before.

Next, at D in Figure 5, 9
Rotate the rotary table 9 to set the angle that gives the maximum value of RFi of the specimen (31) to RF the received REt signal of the antenna 1
It is determined by transmitting the signal to the receiver (19) via the cable ATI and reading the reception level with the CPU 171. This operation is called peak search.

Next, keep the 2-turn table α3 fixed at E in Figure 5.

CPU to antenna mount control section (to) of antenna mount aO
Send a command from (7) to drive the horizontal drive unit (goods) to move the antenna 111 in the horizontal direction, read the RE level change of the specimen (31) with the receiver 119, and find its maximum and minimum values. .

Next, the antenna port 1 is moved in the vertical direction by driving the vertical drive section (c), and the maximum and minimum values of the RE level are determined as before. This means that the measurement data of the standing wave has been obtained, and these data will later be used as the correction amount and error analysis data in the RE data processing G in FIG.

After the above driving is completed, the antenna (1) is returned to the initial setting position.

Next, at F in FIG. 5, the antenna mount (14) is set at a predetermined position with the zero rotation table (13 fixed), and the RE emitted by the specimen (3) is received at the antenna port to obtain RFi data.

Next, at G in FIG. 5, the RE data is processed.

Here, the standing wave data acquired at E and the RE data acquired at F are used to determine the frequency nuvectrum of the RH of the specimen (3), the amount of error, and the estimated tf.

The amount of error is the level error of the RF frequency spectrum (11
), and the estimator is used to estimate RBf in the absence of standing waves from RE data measured in a space where standing waves exist. By doing so, the accuracy of the 3MC test can be improved.

Next, at H in FIG. 5, in order to rotate the polarization of the antenna (1), the rotation drive unit -
to rotate the antenna (violet 1) around its directivity axis.

Then repeat steps D to G.

Next, check whether the 3MC test has been completed in the step shown in Figure 5.
Judging from P U +71, if it is necessary to perform the test using another antenna +11, return to C in Fig. 5, select the required antenna stand aa, rotate the stand opening 3 once, Place the specimen (3) opposite the antenna mount Q, and carry out steps from here on to E in the same manner as before.

This invention has been completed as described above.

You can manually move the antenna (1) as you would in the past.

Antenna (1) (
12) It can be moved and replaced, and RFj level peak searches and standing wave checks can be performed automatically and at island speed, making it possible to speed up 3MC testing and save labor. Furthermore, the accuracy of measurement can be increased by the above-mentioned peak search and standing wave data.

See you again Sarah. In the Re test, there are advantages such as complete safety can be ensured since antenna replacement and movement are automated.

In addition, although each component is shown separately in the example, it is possible to combine several components into one and have the functions of each component described above. Various modifications may be made without departing from the gist of the invention.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a conventional device. FIG. 2 is a block diagram showing the configuration of an embodiment of the present invention;
FIG. 3 is a block diagram showing the configuration of the rotary table and the antenna pedestal, FIG. 4 is a diagram showing the positional relationship in which the antenna pedestal is arranged at the rotary station, and FIG. 5 is a flowchart showing the flow of processing. In the figure (11 is the antenna, (21 is the antenna support device 1t)
, +31 is the specimen, (4) is the main plate, (5) is the stand, (6
) is a storage device, (7) is a central processing unit, +81 is an input device, (91 is an input/output interface, +11 is an output display device, and α1) is an optical modem. Eel is an optical fiber cable, 13 is a rotary table, 14 is an antenna mount, Qs+ is a receiver, fil is a RP cape #,
Q71t”! Signal line, a second is the ground line, 09 is the rotary table control unit, clQ is the antenna mount control unit, Qll is the rotary table drive unit, ■ is the table, @ is the vertical drive unit, (Foundation) is the horizontal drive unit , (c) is the rotary drive part, @ is the X-off, the slope is the pillar, @ is the rail, ■ is the slip ring, and (to) is the rotating shaft. In addition, the same or equivalent parts in Figure 0 are given the same symbols. Agent Shin Kuzuno - Figure 1 (also Figure 5)

Claims (1)

[Claims] An antenna support device that supports an antenna that receives or transmits radio waves that are generated from frost, a slave device, or is showered on a slave device when conducting an electromagnetic compatibility test of an electronic device. , a storage device that stores a program necessary for controlling the direction of rotation of the polarized wave of the antenna and the horizontal and vertical movement of the antenna and control conditions for the antenna, and the storage device; a central processing unit that sends and receives information and provides a control signal to control the antenna; an input device that inputs the control reliability;
The above type under the control of the above central processing unit. A rotary table on which a child device is mounted and rotated; a metal base plate attached to the table of the rotary table and grounded; a rotation mechanism that rotates the antenna under the control of the central processing unit; and a rotation mechanism that vertically moves the antenna. a plurality of antenna pedestals each having a vertical movement mechanism that moves the antenna in parallel, and a parallel movement mechanism that moves the antenna in parallel; The antenna is scanned relative to the specimen within a radiation region, and the switching of the antenna is controlled by rotating the rotary table so that the specimen faces an antenna pedestal to which a predetermined antenna is attached. An antenna support device characterized by: