JP2572245Y2 - Jammer measurement device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION This invention is a variety of electronic devices, to jamming measuring device electrically <br/> equipment or the like to determine whether radiates jamming.

[0002]

2. Description of the Related Art FIG. 2 shows a conventional jammer measuring apparatus. In the figure, TT indicates a turntable, and AT indicates an antenna. These turntable TT and antenna A
T is installed in a room (an anechoic chamber) having a structure that blocks external radio waves and does not reflect radio waves generated inside by walls or the like.

[0003] A test piece PC is mounted on the turntable TT. The turntable TT rotates at a predetermined angular pitch (for example, a pitch of 10 °), and changes the direction of the specimen PC. Each time the direction of the test object PC is changed by a predetermined pitch, the measurement unit 2 checks the presence or absence of the interfering radio wave by the antenna AT at the stop position.
, And the level and frequency are stored in the measuring unit 2 when there is an interfering radio wave. The antenna AT is moved up and down by 1 to 4 m by the antenna elevating device AP. That is, the turntable TT rotates by a predetermined pitch and
Each time the antenna AT rotates, the antenna AT is moved. Accordingly, the position of the antenna AT is sequentially moved, and the turntable TT is rotated once each time the antenna AT is set to a new height position.

[0004] Turntable TT and antenna elevating device A
The rotation position and the elevation position of P are controlled by the drive control unit 1. The turntable TT and the antenna lifting device AP
Is provided with a position detecting means, and the position signal detected by the position detecting means is taken into the drive control section 1 and the turntable TT
And the current position of the antenna elevating device are displayed.

[0005] The display unit 4 displays, for example, the frequency distribution of jamming radio waves. The drawing unit 5 has a function of drawing and displaying the distribution of the jamming radio waves. The control unit 3 has a function of controlling all of the drive control unit 1, the measurement unit 2, the display unit 4, and the drawing unit 5.

[0006]

As described above, in the apparatus for measuring jamming radio waves, each time the antenna lifting / lowering device AP changes the height of the antenna AT, the turntable TT is rotated by a predetermined pitch, and the posture of the specimen is rotated by one rotation. And turntable T
The position of the antenna AT is changed every time T rotates once, and the distribution of the jamming radio waves is measured.

However, the minimum movable pitch of the conventional turntable TT is 10 ° pitch, and the antenna lifting device AP is 10 cm pitch. Therefore, there is a disadvantage that the radiation distribution of the jamming radio wave cannot be measured with higher resolution. In order to reduce the minimum movement pitch, a motor having a large torque is used, or a high-precision part is required.

An object of the present invention is to provide a jammer measuring apparatus capable of measuring the jammer distribution with a high resolution by a simple configuration.

[0009]

Means for Solving the Problems A high frequency antenna lifting device for raising and lowering the turntable and the antenna in this invention
Pitch setting means for setting a resolution rotation angle and high-resolution elevation pitch, high set by the pitch setting means
Resolution rotation angle, high-resolution elevation pitch, and minimum movable rotation of turntable TT and antenna elevation device AP
From the angle and the minimum movement pitch, set the high resolution
Operation number calculation means for calculating the number of turntable operations and the number of antenna elevations necessary to realize the turning angle and the high-resolution elevation pitch, and counts the number of turntable operations and the number of antenna elevations, and counts these operation times. A start position changing means for changing the start position for each update is provided.

According to the configuration of the present invention, the high resolution rotation angle and the high resolution pitch which are smaller than the minimum movable pitch of each of the turntable and the antenna elevating device are set as the high resolution pitch.
A high-resolution lifting pitch can be set. That is,
In this invention, the turntable is rotated plural times and the antenna is raised and lowered plural times. When moving up and down a plurality of times and a plurality of times, the start position is changed in the initial state of each operation. Even if the apparatus is moved by the minimum pitch movement amount by changing the start position, the apparatus stops at the position shifted from the previous stop position by the amount shifted by the high-resolution rotation angle and the high-resolution elevation pitch in the initial state.

[0011] Therefore, by moving the turntable and the antenna up and down a plurality of times or a plurality of times, it is possible to measure within the minimum rotation angle and the minimum movement pitch with a resolution of a part of the number of times.

[0012]

FIG. 1 shows an embodiment of the present invention. In FIG. 1, parts corresponding to those in FIG. 2 are denoted by the same reference numerals. In this invention, the turntable TT and the antenna elevating device A
Pitch setting means 11 for setting the pitch of the P purposes to the drive controller 1, dynamic and a pitch setting means pitch set by 11 and turntable TT and the minimum shift pitch of the antenna lifting device AP turntable TT
The operation frequency calculation means 12 for calculating the elevation number of work times and antenna lifting device AP, the start position of the turntable TT and antenna elevation device AP whenever the elevator number of rotation times and an antenna lifting device of the turntable TT is updated And a start position changing means 13 for changing the position.

The pitch setting means 11 can be constituted by, for example, a key board and a storage device such as a register for storing numerical data input from the key board. The number-of-operations calculating means 12 can be constituted by, for example, a microcomputer. For example, when the minimum rotation angle φ of the turntable TT is 10 °, when P = 5 ° is input as the high-resolution rotation angle P from the key board, the number-of-times calculating means 12 calculates the number of times of operation N as N = 10/5 = 2.
Calculate the rotation. That is, one rotation is made at 10 ° intervals, and the second rotation is made one rotation with the start position shifted by 5 °. In this way, a total of 5 ° resolution is obtained.

When the minimum moving pitch Q is 10 cm, the antenna elevating device AP sends a high resolution
When P = 2 cm is input as the descending pitch P , the number-of-operations calculating means 12 calculates the number of operations M as M = 10/2 = 5. Here, the number of operations M is the lifting / lowering speed of the antenna lifting / lowering device AP.
Once from the lower limit of the stroke moves to the upper side, twice moved to the upper side or <br/> et lower limit, it means that repeating this 5 times. In this way, the number-of-operations calculating means 12 calculates the number of operations N and M of the turntable TT and the antenna lifting / lowering device AP.

The start position changing means 13 for changing the start position performs an operation of shifting the start position in a state where the turntable TT and the antenna elevating device AP enter a new number of operations. The amount by which the start position is shifted corresponds to the high-resolution rotation angle P and the high-resolution elevation pitch P input by the pitch setting means 11. For example, when the high-resolution rotation angle θ of the turntable TT is set to 5 °, an operation of shifting the start position by 5 ° in a state where the second rotation is started is performed. Since the minimum rotation angle of the turntable TT is 10 ° in this example, for example, reverse rotation is performed by 10 ° from a position where one rotation has been completed and stopped, and 15 ° is advanced from the reversely rotated position or 15 °.
If it is rotated forward by 10 ° and reversely rotated by 10 °, the result is a shift of 5 ° in the forward direction.

When the high-resolution elevation pitch is set to 2 cm, the antenna elevating device AP moves from the lower end to the upper end at a pitch of 10 cm. If the movement pitch Q is raised by 10 cm, it can be shifted downward by 2 cm. That is, the combination of the operation of moving Q + P, which is the sum of the minimum movement pitch Q and the high-resolution elevation pitch P, and the operation of moving the minimum movement pitch Q in the direction opposite to this operation direction, sets the movement start position by the high-resolution pitch P. Can be shifted. In this way, the turntable TT makes one rotation at the pitch of the minimum rotation angle φ each time the antenna moves, and shifts the start position by the high-resolution rotation angle θ each time it makes one rotation for N rotations. You
You. In addition, in the antenna elevating device, the start position is shifted by the high-resolution elevating pitch P in a state of transition from ascending to descending and in a state of transition from ascending to descending.

These controls can be executed by a microcomputer constituting the operation number calculation means 12.

[0018]

As described above, according to the present invention, it is possible to measure a distribution characteristic of an interference wave having a high resolution by using a turntable having a coarse minimum movement pitch and an antenna elevating device. In addition, since the turntable and antenna elevating device with the minimum moving pitch are used as they are, there is almost no increase in cost, and a high-performance interference wave measuring device can be constructed at low cost, and the effect is extremely practical. Is big.

[Brief description of the drawings]

FIG. 1 is a system diagram showing an embodiment of the present invention.

FIG. 2 is a system diagram for explaining a conventional technique.

[Explanation of symbols]

 TT turntable AP antenna elevating device AT antenna PC Specimen 1 Drive control unit 11 Pitch setting unit 12 Number of operation calculation unit 13 Start position change unit

Claims (1)

(57) [Scope of request for utility model registration] 1. A. First Embodiment A turntable that mounts the specimen and stops at the minimum rotation angle φ that can be stopped and changes the direction of the specimen, and a turntable provided separately from this turntable and supported by a lifting device so as to be able to move up and down An antenna for receiving the emitted jamming radio wave, and a drive for rotating the turntable by one rotation of the minimum rotation angle φ each time the position of the antenna is changed by the minimum movement pitch Q at which the antenna can be stopped. A jammer measuring apparatus comprising: a controller; and a measuring unit that measures the level of jammer emitted by the specimen received by the antenna each time the turntable stops at the minimum rotation angle φ. In B. B. pitch setting means for setting a high-resolution rotation angle θ of a pitch smaller than the minimum rotation angle φ of the turntable, and a high-resolution elevation pitch P smaller than the minimum movement pitch Q of the elevation device; High resolution rotation angle θ set by this pitch setting means
From and the minimum angle of rotation φ of the turn table, this
Of the minimum rotation angle φ of the high-resolution rotation angle θ
Operation number N of the turntable necessary to equally divide in
Is calculated by N = φ / θ, and the elevation of the lifting device required by the end of the measurement of the elevation device from the high resolution elevation pitch P set by the pitch setting means and the minimum movement pitch Q of the elevation device. An operation number calculation means for calculating the number M of movements, in which the operation of raising the antenna from the lower limit side to the upper limit side and the operation of lowering the antenna from the upper limit side to the lower limit side within the stroke range are each performed by M = Q / P. and, D. And operation of the upper Symbol turntable is rotated by the high-resolution rotation angle theta angle phi + theta plus the minimum rotation angle phi of the turntable from its stop position per rotation, the minimum angle of rotation to this the direction of rotation GyakuMuko a control of repeating the rotation number N of the turntable by moving the initial rotation position of the turntable by the high-resolution rotation angle θ by a combination of operations of rotating by φ; Each time the antenna moves up or down and reaches the upper limit or lower limit of the lifting stroke of the lifting device, the antenna is moved by Q + P obtained by adding the high resolution lifting pitch P set by the pitch setting means to the minimum movement pitch Q. The combination of the movement operation and the operation of moving the minimum movement pitch Q in the direction opposite to the movement direction is performed by A start position changing means for performing control for moving the start positions from the upper limit side and the lower limit side by the high resolution elevation pitch P, respectively.