WO1983001515A1

WO1983001515A1 - Echo display unit for a plurality of sectors

Info

Publication number: WO1983001515A1
Application number: PCT/JP1982/000319
Authority: WO
Inventors: Kaisha Koden Seisakusho Kabushiki
Original assignee: Tanaka, Isokazu; Kato, Takeshi; Ryugo, Shigeru; Fujii, Masahito; Sunayama, Hirokazu
Priority date: 1981-10-20
Filing date: 1982-08-16
Publication date: 1983-04-28
Also published as: AU8767182A; JPS5868680A

Abstract

A sector scanning sonar can direct a transmitter/receiver (1) in a desired direction by turning means (2, 4, 201) and angle-of-depression setting means (3, 4, 301). Since the elements of the transmitter/receiver (1) are circularly arranged, it has been impossible to display the detected information in all circumferential directions with a sufficient intensity on a cathode ray display circuit. To eliminate this drawback, the detected information from all the circumferential directions concerning to the selected sector, distance, and azimuth is written in a main memory circuit (10), is controlled by an address control circuit (8), is stored temporarily, is controlled to correspond to the scanning format of raster scan type color display means (11, 13, 14) by an address control means (12), is repeatedly read, and is applied to the display means (11, 13, 14).

Description

Specification

Title of invention ''

Ecological display of compound teaching sector

Technical field

According to the present invention, an acoustic beam is transmitted to a predetermined 'sector' using an array of transducers arranged in an arc shape, and then received using the aforementioned array of elements. Processes the phase and amplitude of the waved echo signal to produce a sharp beam.3) The received beam forms a spiral in the range of the above sector. The present invention relates to an echo display device for displaying the obtained echo signal as an image on a scanning display. '·.

Background art

The array of transducer elements is arranged in a circle, and the entire element is used to radiate the acoustic pulse into the water before being received by this element array. Processes the phase and amplitude of the echo signal to create a sharp ¾ receiving beam.] よ This receiving beam] 9 ス Spiral around the axis of the element train Scan and perform the scan]? The obtained echo signal is displayed as an image on a scanning display such as a Braun tube, so that the position, orientation and shape of the target can be determined. The sonar device to detect is known.

In order to detect sound waves not only in parallel to the water surface but also by emitting sound waves obliquely to the water surface,

OMPI Due to the provision of means for controlling the tilt of the axis of the transducer element array, it was not possible to arrange the transducer element array in a circular shape, and some of the elements were missing. However, there are cases where the arc arrangement is inevitable. In this case, the detection range of the arc-shaped element array is J9 in a sector shape, and the detection display is a sector shape. In order to detect over 360 degrees around the axis of the element array, after detecting an angle range, move the element array around the axis. It turns to detect an angle range that has not been detected before. On the other hand, the propagation speed of sound waves in water is about 1500 in 1 second, so it takes 2 seconds to detect it up to 1500.] J, and the conventional brown tube remains. Due to the short light time, it is difficult to detect and display a certain angle range and then to detect and display other angle ranges while maintaining the relative angular positions of these two detection angle ranges. is there. That is, it was not possible to display the detection over 360 degrees with sufficient brightness in this way.

Disclosure of the invention

The purpose of the present invention is to use an arc-shaped transducer element array, and to provide good display of detection information over 3 to 60 degrees with respect to the axis of the element array. An object of the present invention is to provide a multi-sector echo display device that can be used.

According to the present invention, the arc of the transducer arranged in an arc shape is

Ο ΡΓ Transmits the received beam to a predetermined sector using the element sequence, and then uses the element sequence described above to set the phase and phase of the received echo signal. In an echo detection device that scans the sharp receiving wave beam obtained by processing the amplitude spirally within the range of the above-mentioned sector, by means of the sector switching means]? The detector array is configured so that the detector can be selected by rotating the array around its axis, and the echo signal obtained by scanning the receiving beam is distance and azimuth. The address is stored in a memory address of a main memory circuit corresponding to the selected sector by an embedded address control circuit. The display address control circuit synchronizes with such a scanning display, and the read echo signal is read out from the display information. It is supplied to the scanning type display with.

With such a configuration, the echo signal for one sector is stored in the main memory circuit, and then the に対する signal for the other sectors is stored in the main memory circuit. In the same manner, an echo signal over 36 axes of the axis of the element row is stored in the main storage circuit, and the entire main storage circuit is read out and displayed on the display. Each time, the image of the echo signal is displayed and the reading speed of the main memory circuit is set to an appropriate value.

Brief description of drawings ■

'' O FI -FIG. 1 is a block diagram showing an example of a multi-sector echo display device according to the present invention;

FIG. 2 is a diagram showing a display example by the display device of the present invention when the number of sectors is three.

BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 1 shows a configuration example of a main part of an echo display device according to the present invention. As shown in the figure, the element sequence 1 for converting sound waves used for transmission and reception into electric power is composed of several tens of ceramics and ferrites as shown in the figure. Into a circular arc shape] 3, not shown, but called Sona Dome

It is stored in a waterproof case. When transmitting a sound wave, the power of the sound wave frequency is transmitted from the transmission circuit to the required portion of the element train 1).

The element row 1 does not extend all the way around as shown in the figure, that is, does not extend over 360 degrees, and is partially missing because of the lack of space of the sound beam. This is to accommodate a mechanism for inclining the direction of transmission and reception (called dip adjustment). By performing this dip adjustment, the sound beam can be deflected from the water surface to the bottom. The dimensions and number of element rows 1 can be determined by the sharpness and strength of the target acoustic beam. For example, in the case of a sound wave frequency of 75 holes, a receiving beam width of 10 degrees, and an electric power transmitter for transmission, the diameter of the element row 1 is 25 mm.

REA

O PI It is a centimeter hole, length is 20 centimeters, number of elements is 40, and the material is barium titanate.

The element row 1 is mounted on the swivel shaft 2 that coincides with the position of the axis, and the swivel shaft 2 is rotated by the swivel motor 201 so that the element row 1 Turn 1 around its axis to transmit and receive sound waves. を Change the sector (angular area). The swivel shaft 2 is mounted on the dip shaft 3, and the dip shaft 3 is rotated by the dip motor 301 to tilt the axis of the element Ijl. And the dip angle of element row 1 is adjusted.

The starting and stopping of the rotation motor 201 and the inclination motor 301 are performed by the control power supplied from the angle control circuit 4. The operation of the angle control circuit 4 is controlled by the transmission / reception control circuit 7.

The echo signal induced in the element train 1 by the received sound wave] 3 is amplified by the receiving circuit 6, and the amplified analog signal is converted into a digital value (A-D conversion). At the same time, the amplitude and phase of the echo signal induced in all or a part of the element train 1 are only enough to generate the received beam. The beam is processed so as to be sharp, and based on a command from the transmission / reception control circuit 7, the above-mentioned reception beam spiders the range of the previously determined sector. It is made to scan in the shape of a circle. Of this scan

OMFI The method is to process and combine the amplitude and phase of the echo signals of multiple elements in element row 1, similar to a conventional scanning type sonar. The circuit configuration must be such that a sharp received beam can be obtained, and the relative relationship between these amplitudes and phases should be within the range of the sector in which the plurality of elements are determined in advance. In this manner, the pointed beam is scanned at high speed in a partial spiral manner within the range of the sector described above.

The echo signal obtained by the scanning performed in such a procedure is AD-converted and stored in the main storage circuit 10. This operation will be described later. -The write address control circuit 8 performs color browsing so that the received echo signal is at the relative position of the underwater target that generated the echo. It controls the display location (hereinafter referred to as an address) for displaying on the control panel 14. In order to use this address as a reference for control, the angle control circuit 4 transmits and receives sound waves from the transmission / reception control circuit 7 to the address control circuit 8 of Jinge. Correcting the above address by adding the sector designation, the trigger signal for transmitting the transmitting circuit 5 and the signal for commanding the scanning of the receiving beam of the receiving circuit 6, respectively. O

As described above, in response to the scanning command, the echo signal obtained by scanning the pointed-in receiving beam is A—

CMFI The data is D-converted and stored in the main storage circuit 10. The writing address control circuit 8 has a coordinate conversion function. According to the present invention, an echo signal having distance and direction information is scanned by scanning a sharp receiving beam spirally in a pre-defined sector. I get 得る.

Therefore, the image forming method of the electron beam of the color-brown tube 14 is, like a general television, a set of bright spots on the vertical and horizontal sweep lines. If there is, the vertical and horizontal sweep lines (hereinafter referred to as rasters) can be transferred when imaging the above-mentioned spiral-captured echo signal. And are required.

This transfer operation is called coordinate transformation. The write address control circuit 8 that operates as described above adds the position information in the raster of the echo-converted echo signal to the memory address switching circuit 9. However, the signal used as the reference of the raster of the force line tube 14 created by the displayed address control circuit 12 is added, and the signal of the coordinate-converted position is added. Are arranged so as to appear at the correct positions of the raster, and the positions of the main storage circuit 10 where the echo signals are stored are set.

A part of the output of the address control circuit 12 of the display is applied to a deflection circuit 13 of a power-brown tube, where it is formed into a wave-shaped form and amplified to form a color-brown tube 1 4 e-beam

ΟΜΡΙ To the raster.

The raster created in this way corresponds to the position of the echo signal determined by the receiving circuit 6 scanning with a sharp receiving beam according to the command of the transmission / reception control circuit 7. I do.

As described above, the A-D converted echo signal from the receiving circuit 6 is added to the main memory circuit 10 in which the address for storing the echo signal is set. In response to a command from the memory address switching circuit 9, the electron beams of the three primary colors of the color brown tube 14 through the color output circuit 11 are density-modulated. I do. -The color output circuit 11 separates the digital value of the output of the main memory circuit 10 into three primary colors (red, green, and blue) so that the corresponding color is obtained. Circuit (called the color matrix). Then, through the color matrix, the color of the echo signal appearing in the image of the color brown tube 14 corresponds to the color corresponding to the characteristic of the AD conversion of the receiving circuit 6. become. For example, if the expected strongest echo is red, the medium-strength echo is yellow, and the weakest echo is blue, the strongest echo is red. Only in the case of medium-intensity echo, the output from the color output circuit 11 is used to mix the electron beams of three colors in appropriate amounts. Electron beam control electrode f ^ It is added to

The value input circuit 15 transmits digital values such as the scanning range (sector, distance, angle, etc.) of the echo of the receiving beam, its water area and water temperature to the color-browser tube 14. In order to input and display on the display screen, the position of those digital values on the raster is set by the command of the transmission / reception control circuit 7. This circuit 15 includes a circuit that determines the shape and dimensions of the displayed numerical value, and adds its output to the color output circuit 11 to superimpose the echo image and digital numerical value. To display.

Fig. 2 shows the invention in the case where the sector is set to 120 degrees and three sectors are connected to display the echo over 360 degrees simultaneously on the brown tube. An example will be described. On the display surface 20 of the force Rabraun tube, digital images showing the images of the three sectors 21, 22, 23, the angle of dip, and the distance indicating the display range of the image Numerical values 26 and 27 are shown as examples.

If the repetition period of the signal read from the main memory circuit 10 is 10 times or more per second, as in a normal caratrevision system, these images are our eyes. In this example, the image of the sector 21 appears first, then the image of the sector 22 appears, and then the image of the sector 22 appears. The image of 23 appears, and the image of 360 degrees is completed.

O PI It is configured to be repeated every 10 seconds.

For example, after storing the reception echo in the receiving range of the sector 21 in the main storage circuit 10, the reception echo in the receiving range of the sector 22 is stored in the main storage circuit 10. When it is stored in the memory, it is necessary to turn the element row 1 so as to be directed to the sector 22 by the turning motor 201. Therefore, it takes a few seconds to 10 seconds to complete the recording of the receiving echo in the coverage area of all sectors. In the present invention, since the contents of the main circuit 10 are held until the scanning of the coverage area of each sector is completed and the next scanning is repeated, the contents of all the sectors are determined. By reading out the contents of the received echoes at a rate of several 10 times per second, a clear image can be obtained.

Echo images A, B, C, and D are included in these sectors 21, 22, and 23, but as described above, these echo images have their intensities. It has colors according to the colors.

A mark 25 indicating a reference direction such as a bow of a ship equipped with the device of the present invention is displayed, and the pointing direction of each sector is read based on the mark 25. The echoes of the noise returning from the waters near the ship and the echoes of the waves are shown in Video 2. In the vicinity 28 of the boundary between sectors 21 and 22,

Ο ΓΙ Due to the time difference between when the receiving beam scanning is completed and when the receiving beam scanning of sector 22 is performed, the same is applied if the echo varies. In some cases, the positions of video examples B and C may be displayed intermittently even if the echo is from the target. In order to reduce such discontinuity between the sectors, by narrowing the range of each sector, the element sequence 1 is assigned to the adjacent sector. It is only necessary to reduce the time required to change the direction. For example, the range of the sector is selected to be 60 degrees. In order to reduce the visual discontinuity in the vicinity of the sector boundary 28, the vicinity of the boundary of each sector is displayed so as to be superimposed on the adjacent sector. For this purpose, at least one of the displayed address control circuit 12 and the write address control circuit 8 is operated by the main memory circuit. The output of 10 should be set so as to meet the above purpose.

As is well known, the speed at which sound waves propagate in water is about 1,500 meters per second, so the self-monitoring object that needs to detect the echo is 1,500 meters. At this distance, it takes about 2 seconds to detect a target in the sector as described above. Therefore, it takes about 6 seconds to detect a target in the range of 360 degrees using the three sectors shown in Fig. 2. If it is assumed that a conventional 0 memory circuit is used and a display device is used to display an image of the same sector as above,

O PI Since the image of the echo that has passed the afterglow time of the tube disappears, it is impossible to observe all sectors simultaneously.

According to the present invention, the echo signal s of each sector is stored in the main memory circuit 10 and then repeatedly read out and displayed. A clear display can be obtained even with a short blown tube with a persistence time of several tenths of a second, such as a bent tube.

In the above description, the echo signals of the target around 10 around the axis of element row 1 are converted into a plurality of sectors 21 1,

It was divided into 2 and 23 and displayed as a continuous image. However, when receiving the echo signal of one of the multiple sectors, the rotation shaft 2 The vertical distribution of the echo signal can be displayed by moving and tilt angle 3 to the direction of another target, for example, to the bottom of the water.

You can also do it.

Although not shown, the numerical value input circuit 15 has a function to generate a mark for measuring the distance and angle of the echo image in addition to the numerical value.

Display the 20 value at the appropriate position of the display surface 20 of the brown tube: 5: Place

You can also do it. In addition to displaying the echo signal on a color-brown tube, it is also possible to display it on a black-and-white brown tube, and also to display it on a scan-type display unit that eliminates noise.

24 You can do it too.

CMPI

Claims

The scope of the claims

1. Using the element array of the transducers arranged in an arc shape, transmit a sound beam to a predetermined sector, and then use the element array to receive a sound beam. The echo detection device that scans the sharp received beam obtained by processing the phase and amplitude of the echoed echo signal in a spiral manner within the range of the above-mentioned sector is called a scanning type. A display, a main storage circuit capable of storing display information for one display surface of the scanning display, and the main storage circuit read out in synchronization with the scanning of the scanning display; The display address control circuit that supplies the read information as display information to the scanning display and the element array described above are rotated about the axis. And a sector switching means for switching the detection sector by scanning the receiving beam.)) Address corresponding to the distance and azimuth, and by the above-mentioned sector switching means]? Address control of writing that is stored in the storage address of the main memory circuit according to the selected sector Display of multiple sectors with circuits

2. In the echo display device described in claim 1,-near the boundary of a plurality of sectors, the end of the writing is performed so that the images of the echo overlap. A multi-sector eco-display device in which at least one of the address control circuit and the address control circuit shown above is set.

3. In the echo display device described in claim 1, an angle control circuit capable of adjusting the inclination by controlling the inclination of the axis of the element array can be provided. Eco display of the sector.

4. In the echo display device described in claim 3, when an echo signal of an arbitrary sector among a plurality of sectors is received, an element sequence is generated. A multi-sector echo display device that displays the echo signal of another target by changing the angle of dip at least.

5. The echo display device according to claim 1, further comprising an angle control circuit for arbitrarily turning the element array around its axis. Eco device.

6. The echo display device according to claim 1, further comprising: a numerical value input circuit for generating an index for displaying a distance or an angle as an image as an image; An index for reading the position of the position · An echo table of multiple sectors that superposes the numerical signal to the color output circuit

7. In the echo display device according to any one of claims 1 to 6, the scanning display device is a force color display device and is read from the main storage circuit. The displayed information is converted into a color signal of three primary colors, which represents the color corresponding to the level, by the power color output circuit, and Five

—Multi-sector echo display device to be supplied to the display