JPS5868680A - Echo indicator for several sectors - Google Patents

Abstract

PURPOSE:To achieve a clear echo indication covering 360 deg. by turning a wave transmitter/receiver element to the subsequent sector after ultrasonic echo signals in a received wave beam scanning over a given sector are written into a memory circuit. CONSTITUTION:Echo signals corresponding to a spiral scanning over a sector for an element train 1 of ultrasonic wave transmitter/receivers by a sharp received wave beam formed through the element train 1 thereof controlled with a dip motor 301 are received with a receiving circuit 6 or the like for an analog- digital conversion and written into a main memory device 10. Upon the end of the writting, the element train 1 is turned to the subsequent sector with a turning motor 201 and in the same procedure, new echo signals are written into the circuit 10. Therefore, when the contents of the circuit 10 are read out to control a color cathode ray tube 14, the vanishing of video with the passage of an afterglow time can be eliminated thereby enabling a clear ultrasonic echo color indication covering 360 deg..

Description

DETAILED DESCRIPTION OF THE INVENTION There are sonar devices that transmit sound waves and receive echoes by arranging ceramic or ferrite elements suitable for reversibly converting electric power and sound waves in an arc shape.

This type of sonar device excites all or part of the above-mentioned elements when transmitting waves, transmitting sound waves to a predetermined sector, and when receiving echoes, excites all or part of the above-mentioned element rows. Processes and synthesizes the amplitude and phase of the power of the induced echoes, shapes them into a sharp receiving beam,
It is configured to scan in a spiral pattern to clearly capture the position and shape of a target object.

The present invention is directed to a sonar device having a structure in which it is impossible to arrange the above-mentioned element rows all around the circumference (360 degrees). This invention relates to an improvement of a sonar device β having a structure that cannot be achieved over a long period of time, and will be explained in detail below with reference to FIG.

Figure 1 shows the configuration of the main part of the present invention. 1 is an element row that converts electric power and sound waves used for transmitting and receiving waves. As shown in the figure, several dozen elements are assembled in an arc shape. 1 Although not shown, it is stored in a water-resistant case called Tuna Dome.

When transmitting sound waves, power at the sound wave frequency is sent to the required portions of the element array 1 from the transmitting circuit shown in 5.

The element row 1 has a full circumference as shown in the figure, and the reason why a part is missing is that the missing space accommodates a mechanism for adjusting the direction of the transmission and reception of the sound wave beam to IIj+4+ (referred to as a dip adjustment crab). It's for a reason.

The range of the sound wave beam produced by such an arc-shaped element row 1 cannot include the area where the element row 1 is missing, but by adjusting the inclination angle described above, the sound wave beam can be directed from the water surface to the water bottom. You can change direction up to.

The dimensions, number, etc. of the element row 1 are determined by the sharpness, intensity, etc. of the target acoustic beam.

For example, if the frequency of the sound wave is 75 kilohertz, the width of the receiving beam is 10 degrees, and the power of the transmitter is 10 kilowatts,
The diameter of the element row is 25 cm.

Length 20cm, number of elements 40. The material is barium titanate.

Reference numeral 2 denotes a rotating shaft of the element row 1, which changes the sector in which waves are transmitted and received by a rotating motor shown at 201.

The inclination shaft indicated by 3 is provided to adjust the inclination angle of the element row 1, and the inclination of the element row 1 is changed by the inclination motor indicated by 301.

The turning motor 201 and the inclination motor 301 are started and stopped by electric power supplied from the angle control circuit shown at 4, but the operation of the angle control circuit 4 is controlled by the transmission/reception control circuit shown at 7. 6 is a receiving circuit that amplifies the echo signal induced in the element row 1, converts the ablog signal directly into digital (called A-D conversion), and converts all or part of the element row 1. The amplitude and phase of the echo signals induced in the elements of the section are processed and synthesized so that the received beam becomes as sharp as possible, and the received beam is predetermined based on the commands of the transmission/reception control circuit 7. The selected sectors are scanned in a spiral manner.

This scanning method is similar to conventional set meal type sonar, in which the width and phase of the echo signals of multiple elements in element row 1 are processed and synthesized to obtain a sharp receiving beam. In a circuit configuration, the above-mentioned plurality of elements are electronically fed +IH within a predetermined sector range, and a sharp receiving beam is sent in a partial spiral shape at high speed within the sector range. It scans.

The echo signal obtained through scanning obtained through this procedure is A-
The data is D-converted and stored in the main memory circuit shown at 10, and this operation will be explained later.

The write address control circuit 8 is configured to adjust the address so that the received echo is in the relative position of the underwater target from which the echo was obtained.
This is a circuit for controlling the display location (hereinafter referred to as address) for displaying on the color cathode ray tube shown in 4.

In order to use this address as a control standard, the sending/receiving 1ttl
The J@1 circuit 7 sends to the write address control circuit 8 designation of sectors for transmitting and receiving sound waves, a trigger signal for transmitting waves from the transmitting circuit 5, and scanning of the receiving beam from the receiving circuit 6. Command, add a signal, and set the above address correctly.

As already explained, the echo signal obtained when the sharp receiving beam scans in response to a scanning command.

The data is A-D converted and stored in the main memory circuit 10.

The write address control circuit 8 has a coordinate conversion function. In the present invention, a sharp reception beam is scanned in a predetermined sector in a circular pattern to obtain an echo signal having information on the distance and direction of the echo signal.

Therefore, if the image format of the electron beam of the color cathode ray tube 14 is an aggregation of bright spots on the vertical and horizontal axes as in a general television, then the echo signal captured in the spiral shape described above can be imaged. It is necessary to convert the data into vertical and horizontal sweep lines (hereinafter referred to as rasters) when converting the data into a vertical and horizontal axis.

This transfer operation is called coordinate transformation.

Information on the position in the raster of the echo signal that has undergone coordinate transformation is added from the writing address control circuit 8 operating as described above to the storage address switching circuit shown at 9.
Here, the reference signal for the raster of the color cathode ray tube 14 created by the address control circuit shown at 12 is added, and the signals at the coordinate-converted positions are arranged so that they appear at the correct positions on the raster. , the position where the echo signal is stored in the main memory circuit 10 is set.

A part of the output of the display address control circuit 12 is applied to the deflection circuit of the color cathode ray tube shown at 13, where it is waveform-shaped and amplified to sweep the electron beam of the color cathode ray tube 14 in a raster pattern.

The raster created in this way is transmitted to the transmission/reception control circuit 7.
This corresponds to the position of the echo signal determined by scanning with the sharp receiving beam of the receiving circuit 675 in accordance with the command. .

As explained above, the receiving circuit 6 stores the address of the receiving circuit 10 in the main memory 1 circuit 10 in which the address for storing the echo signal is set.
The echo signal power is A-D converted from
color cathode ray tube 1 through the color output circuit shown in
The color output circuit 11 that density-modulates the electron beams of the three primary colors in No. 4 converts the digital value of the output of the main memory circuit 10 into an analog value (hereinafter referred to as 1)-person conversion).
It also includes a circuit (referred to as a color matrix) that decomposes the D-A converted analog value into three primary color components (red, green, and blue).

Then, the color of the echo signal that is subjected to D-A conversion and passes through the color converter 1 node and appears in the image of the color brown cat 14 becomes a color that corresponds to the characteristics of the A-D conversion of the receiving circuit 6.

For example, if you want to make the strongest expected echo red, the medium-intensity echo yellow, and the weakest echo yellow, the strongest echo will have only a red electron beam, and the medium-intensity At the time of echo, an output that mixes three colors of electron beams in appropriate amounts is applied from the color output circuit 11 to the control electrodes of the three primary colors of electron beams of the color cathode ray tube . In order to insert digital values such as the beam echo scanning range (sector, distance, angle, etc.), the area of water and water temperature, the circuit sets the position of these digital values on the rask according to the command of the transmission/reception system #11 circuit 7. , the shape of the numerical value, and a circuit for determining the 1 modulus, etc., and its output is added to the color output circuit 11, and the echo image and the digital numerical value are superposed and displayed.

FIG. 2 shows an embodiment of the present invention in which a sector is 120 degrees and three sectors are connected to simultaneously display 360 degree echoes on a cathode ray tube. Examples include images of three sectors indicated by 21, 22, and 23, angles of inclination indicated by 26, and 27, and digital numerical values indicating distances indicating the display range of the images.

If the repetition rate of the signal read out from the main memory circuit 10 is several dozen times per second or more, as in a normal color television system, these images appear to our eyes as continuously shining images. However, in this example, 2
After the image of sector 1 appears, the image of sector 22 appears, then the image of sector 23 appears, and the image becomes 360.
The system is configured so that a single image is completed, and this operation is repeated several dozen times per second.

Among these sectors, there are images of echoes shown in KA, B-, C, and DI, and as explained above, the images of these echoes are colored according to their intensity. There is.

25 is a mark indicating a reference direction such as the bow of a ship equipped with the device of the present invention, and the pointing direction of each sector is read based on this mark.

24 are echoes of noise returned from the water area near the ship, echoes of waves, etc.

If there is a change in the echo near the boundary of the 28-h sector due to the time interval from the end of scanning of the receiving beam of sector 21 to the scanning of the receiving beam of sector 22, the same Even if the echoes are from a target object, the positions of examples B and C may be displayed discontinuously.

In order to reduce such discontinuity between sectors, the time required to change the direction of the element array l to the adjacent sector can be shortened by narrowing the range of each sector. Select 60 degrees.

In addition, in order to reduce the visual discontinuity of the video near the sector boundaries 28 mentioned above, it is sufficient to display the areas near the boundaries of each sector so as to overlap the adjacent sectors. The operations of the address control circuit 12 and the memory address switching circuit 9 may be set so that the output of the main memory circuit 10 serves the above purpose.

As is well known, the speed at which sound waves travel through water is approximately 1 per second.
500 meters, so if the target requiring echo detection is at a distance of 1500 meters, the time required to detect an echo in such a sector would be approximately 2 seconds.

Therefore, by the three sectors illustrated in FIG.
The time required to detect echoes in the 0 degree range is approximately 6 seconds.

If we were to display the same sector images as above using a conventional display device, the echo images would disappear after the cathode ray tube's afterglow time, so we would have to observe all sectors at the same time. It is impossible.

Since the present invention stores the echo signals of each sector in the main memory circuit 10 and then repeatedly reads them out and displays them, the cathode ray tube has a short afterglow time of several tenths of a second, like a cathode ray tube for color television. However, a clear display can be obtained.

In the above description, the echo signals of surrounding targets centered around the element row 1 are divided into a plurality of sectors 21 , 22 .

However, when receiving signals from one sector out of a plurality of sectors, the rotation/toft 2 and the dip shaft 3
By moving the echo signal in the direction of another target, for example in the direction of the water bottom, the vertical distribution of the echo signal can be displayed.

Although not shown, a function is added to the numerical value insertion circuit 15 to generate a mark for measuring the distance and angle of the echo image in the numerical value pond, and the numerical value corresponding to this mark is displayed on the display section 20 of the cathode ray tube. It can be displayed at any suitable location.

Since the present invention is constructed as described above, it is possible to provide a high performance innerwear device.

[Brief explanation of the drawing]

FIG. 1 shows the configuration of the main part of the present invention. FIG. 2 shows a display example of the present invention in which the number of sectors is set to three. ■... Element row of transducer, 2. Rotating shaft of element row. 3. Inclination angle of element row/yaft,
201... Turning motor, 301... Inclination angle motor, 4... Angle control circuit, 5... Feed 1g circuit, 6...
・Reception circuit including set meal circuit, 7... Transmission/reception system @1 circuit, 8
...Writing address control circuit, 9..Storage address switching circuit, 10..Main memory circuit, 11..Color output circuit, 12..Display address control circuit, 13..
Deflection circuit of cathode ray tube, 14...color cathode ray tube,
15...Numeric value insertion circuit, 20...Display surface of cathode ray tube, 21...Sector in which echo signal is being written, 22...
- Sector waiting to be written, 23... Sector waiting to be written, 24... Image of noise in the water area near the element row, 25... Mark of reference direction such as the bow, 26...
・Angle of inclination of element row, 27...Distance indicating video display range, 28...Near sector boundary, A...
Example of echo image (in sector 21), B...Extra image of echo (in sector 21), C...Example of echo image (in sector 22), D...Example of echo image (in sector 21) 23). Plain language of patent applicant's drawings (Contents: No changes) Thursday 1. Written amendment to the formalities (method) Commissioner of the Japan Patent Office on March 3, 1982. 1. Case indication patent application 1982-166482. 2. Title of the invention. Multiple sector echo display device 3. Relationship with the case of the person making the amendment Patent applicant Ma 141 2-10-45 Kamiosaki, Tokyo Parts Industry Ward February 26, 1982 (shipment date) 5. Specification subject to amendment・Drawing 6, Description of the contents of the amendment ・Engraving of the drawings (no change in contents) Procedures Amendment (voluntary) March 23, 1980 Commissioner of the Japan Patent Office 1, Patent Application for Indication of Case 1982-166482 2 , Title of the invention Multi-sector echo display device 6, Relationship with the case of the person making the amendment Patent applicant Ma 141 2-10-45 Kamiosaki, Tokyo Parts Industry District Specification 5, Contents of the amendment (1) Page 11 top Add the following between lines 12 and 16. [For example, after the received wave echo in the assigned range of sector 21 is stored in the main memory circuit 10, the received wave echo in the assigned range of sector 22 must be stored in the main memory circuit t...P7. Therefore, it takes several seconds to several tens of seconds to complete storing the received echoes in the coverage area of all sectors. In the present invention, the contents of the main memory circuit 10 are retained until the scanning of the assigned range of each sector is completed and the next scanning is repeated, so that the contents of the received wave echoes of all sectors are stored every second. By reading it out several dozen times, you can get a clear image spanning 660 degrees.''

Claims (1)

[Claims] 1. After transmitting a sound wave beam to a predetermined sector using an array of transducer elements arranged in an arc shape, the phase and amplitude of the received echo are determined using the element array. In an echo detection device that scans a sharp reception beam obtained by processing in a spiral manner in the range of the sectors mentioned above, a main memory circuit in which an echo signal obtained by scanning the reception beam corresponds to a predetermined sector is used. means for setting the writing address control circuit so that the data is stored in the main memory circuit, means for rotating the element array so as to transmit and receive the sound wave beam of the predetermined sector after the above-mentioned storage is performed, The echo signals received in a plurality of sectors are simultaneously processed by means for reading out the signal and density modulating the electron beam of the color cathode ray tube, and by means for sweeping the electron beam of the cathode ray tube based on the output of the address control circuit of the display. A multi-sector echo display device characterized in that it displays: 2. In the echo display device according to claim 1, write address 1i11 control r61 path and display address 1 circuit double-edged or Multi-sector echo display device configured on one side. 3. In the echo display device according to claim 1, l&i! of the element rows. A multi-sector echo display device in which an angle control circuit is set so that jl and inclination can be adjusted arbitrarily. 4. In the echo display device according to claim 1, the echo signal recorded in one memory circuit is divided into three primary color signals in the color output circuit, and the electronic beam for the three primary colors of the color cathode ray tube is transmitted. 44 density-modulated multi-sector echo displays. 5 In the echo display device according to claim g1, a multi-sector echo display device is provided with a numerical intermediary circuit for distance, angle, etc., and superposes indicators and numerical values for reading the echo position to a color output circuit. . 6. In the echo display device according to claim 1, when receiving an echo signal from any sector among the plurality of sectors, the rotation and inclination angle of the element row are moved to detect other targets. A multi-sector echo display device that displays echo signals.