JPS58174872A - Underwater detection display - Google Patents

Abstract

PURPOSE:To enhance the relativity of old and new informations received and that between information received and reception points by combining old information received and reception time. CONSTITUTION:A control pulse generation circuit 2 sends out a pulse at a preset cycle to a transmission trigger generation circuit 3 while feeding it to an X-axis counter 7 and Y-axis counter 8. The X-axis counter 7 adds and counts a divided pulse and stops the action when the counts reach m0-1. The Y-axis counter 8 subtracts 1 from output counts each time a control pulse is provided from the control pusle generation circuit 2 and set at m0-1 with the subsequent pulse when the counts are down to 0. Both the counts are sent into a memory circuit 6 through a switching circuit 10 and signals received converted to digital are written into addresses as specified by both of the counts.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for recording received signals obtained by continuous underwater detection using a directional ultra-high pulse system and displaying them over time on, for example, the CR1 display. Regarding underwater detection @ non-equipment to display.

The applicant has provided the above-mentioned memo with a capacity greater than the pixel capacity of one screen of the display device, at least in the chronological direction, and the comparative information stored in the above-mentioned memo for the purpose of comparison with past detection information, reconfirmation, etc. A proposal was made regarding an underwater detection device that rereads and displays all old information as needed (Gan No. 56-2034). This is intended to provide the above-mentioned ratio axis and pre-reconfirmation functions similar to pen-recording underwater detectors.

However, when performing underwater detection, the optimal range for detection is required depending on depth, fish school conditions, etc., and as a result, it is almost impossible to always conduct observations at the same range. If you take into account that the detection period changes according to the change in the range mentioned above, the proportion of the time direction on the display will not be proportional to the time on the scale, and therefore the desired redisplay information will not be displayed at any time. It is extremely difficult to know what was detected or, conversely, to re-display information that was detected at a particular time in the past.

The present invention has been developed in consideration of Saturdays and Sundays, and the detection signal is interrogated every J9r time. ri) Addresses are sequentially memorized and a specific elapsed time sound is specified. The present invention provides an underwater detection display device d that successively displays addresses and rereads and displays information stored at the addresses.

Hereinafter, it will be explained with reference to the embodiments shown in the drawings.

Figure 1 shows the notes 1. Temple 1 Rainbow Road (
It is an address structure diagram of FIG. 2, 6). The memory circuit 6 is no
It has a storage capacity r of (column c) Then, for each sequential received signal (n6~
1) Column... Executed from the 1st column to the θ column.

Therefore, if a new reception is being performed in the n≦no 1) column while erasing all n0 received signals, the oldest, that is, the (no 1) previous received signal is (n- 1)
It is remembered in the column.

On the other hand, the display device (FIG. 2, 14) of C, etc. has k (< n 6 ) columns in the temporal direction and m in the depth direction. It has rows of pixel containers (not shown). On the display 14, the received signals based on the latest detection are sequentially displayed in rows 0 to (me 1) of the 0th column, and the oldest received signals displayed are (k-1).
) column 0 to (mo 1) rows are displayed sequentially. The memory readout from the memory circuit 6 to the display 14 is normally carried out from the nth column where the latest information exists to the 11th column (
n+1), (n+2)..." (n+k 1) Do n.

Now, FIG. 2 is a circuit diagram showing an embodiment of the present invention, in which numeral 1 indicates a wooden receiver for transmitting and receiving ultrasonic pulses underwater. The transmission VJ is performed by the transmission trigger from the transmission trigger generation circuit 3 based on the pulse sent out from the *t control pulse generation circuit 2. And the reception number 1 is amplified between 11 and 5
After being amplified and detected, the signal is passed through the A and -D conversion circuit 5 and stored in the storage circuit 6.

By the way, the above control pulse generation strategy 2 has e
Pulses are sent out at a predetermined period and are guided to the transmission trigger generation circuit 3, as well as to the X-axis counter 7 and Y-axis counter 7.
It is fed into the axis counter 8.

In addition, the frequency dividing circuit 9 generates frequency dividing pulses at a predetermined period for underwater sound velocity and detection range aV (6+h, which will be described later).
When the first shift reaches (mo-1), the clock operation sound stops. , , and +ff1J of the control pulse generation circuit 2
It is reset by the ml pulse, and the output meter is set to 0.
It is done as follows. The Y-axis counter 8 subtracts the output count value by 1 for each secondary I pulse from the control pulse/generation circuit 2, and when the count value reaches 0, it subtracts (mo 1
).

As a result, the A-D converted received signal is written to the address specified by the elbow count values. At this time, the counts of the X-axis counter 7 and the Y-axis counter 8 correspond to the depth of the memory circuit 6 and the write position in the chronological direction, respectively. Therefore, X 1lil
While the count value of the counter 7 changes from 0 to (mo, -1), the received signal corresponding to the depth direction is written into the memory circuit 6 iC. Next, when a pulse is sent from the control pulse generation circuit 2, the Y-axis counter 8 subtracts the count value by 1, and the X-axis counter 7 counts the previous day's white 5j from 0 to (mol), and stores the depth of the memory circuit 6. The received signal for one part of the direction is contained. Similarly, the above operation is repeated every time the above pulse signal is sent out, so the iv of YIIIllll counter 8
1' value changes from (no-, x) to O-! , the received information is written to all addresses in the d-pin storage circuit 6.

Note that 11 is a clock pulse generation circuit that sends out clock pulses at a frequency of vmo, which is the product of half the underwater sound speed V and mo, that is, vmo. Also, 12 is the detection distance 14a.
This is a detection distance signal sending circuit that sends out a signal corresponding to , and the detection distance is freely variable by + movement. The frequency dividing circuit 9 is configured to send out a frequency divided pulse by dividing the frequency VmQ by a to a frequency vma/a ((()). A periodic pulse is sent out, and the time during which m pulses are sent out is Vv, and the signal transmission 1+'l in the above a/V time 1+'l is a/v×v. As a result, the depth direction is from 0 to m.The received signal to the depth a is t outside the address.
Writing will be delayed at mQ intervals.

Next, read the 1st bird signal from the sr2 memory circuit 6 and read it out I')-
The following will explain how the display 14V is displayed via the A conversion circuit 13.

Symptom 1: Reading and displaying the □□□ signal on the display 14 is performed by vertical sweeping. That is, first, a sweep is performed from column θ in the X direction from 0 to row (mo 1), and then from O to row (mo 1) in the first column in the X direction, and so on. When the process ends, it returns to the 0th column. 1
Reference numeral 5 designates an X-complementary counter that specifies the zone of the optical display readout in the vertical direction, that is, the depth direction, and sets the predetermined periodic pulse sent from the clock pulse generation circuit 16 to 0.
By adding and counting from (mo 1) to (mo 1), the above-mentioned destination address is formed. The above-mentioned count value (mo 1) is reset to 0 by the synchronization pulse sent from the vertical synchronization pulse generation circuit 17 every time the depthwise sweep is performed.

The vertical synchronizing pulse is sent to the sweep circuit 18 to cause the display 14 to perform a complete sweep in the depth direction, and is also sent to the Y-axis counter 19. The Y-axis counter 19 adds and counts the vertical synchronization pulses from O to (k-1), and its output count value serves as a basic count value for designating a reading address in the storage circuit 6 in the chronological direction, as will be described later. Also, the above count value is (k
-1) to O, a pulse is sent to the sweep circuit 18 to perform a sweep in the time direction on the display 14. For the output numerical value of the Y-axis counter 19, the number 11u formed via the adder circuit 20 acts as a read address.

As a result, the output count value of the Y-axis counter 8 is introduced into the other input terminal of the boost circuit 20 via the changeover switch 21.
The reading of the memory contents is carried out sequentially in the fortune-telling direction starting from the newest received signal (shaded area in Figure 1).

Note that the counting capacity of the adder circuit 20 is assumed to be no.

Next, the rereading display system part 22, which is the main part of the present invention, will be explained.

23 is a time counter that plays the role of a clock in the reproduction table 22, and is obtained by dividing the clock pulse frequency by the clock pulse frequency dividing circuit 24 of the clock pulse generation circuit 11, for example, 1 ( H2) second pulse (waveform rate L/2
) is counted. In addition, 25 is a digital time setting unit that can set the time in the form of hours, minutes, and seconds, for example.
The time output is sent as a number converted to seconds! ii”
It is being neglected. The time setting operation of the time counter 23 is performed by first setting the time on the time setter at the time of the setting operation, and then further outputting the numerical value in seconds displayed in the time counter 23. . And the result? -J, outputs the momentary time by adding and counting the second pulses. The time of the above-mentioned time counter 23 is led to the memory 1 channel 27 through the switch 26, and the output counter 8 of the Y-axis at that time is stored at the address corresponding to that time. Write the numerical value. That is, during the high level period of the upper pi-second pulse, the selector switch 26 is connected to the time counter 23 side and the memory circuit 271 is put into the write state. or,
If the memory capacity of the memory circuit 27 is for one day, the water is hardened by 24×60×60XL (Lban, the number of bits when expressed in binary). 28 (d-second pulse low level period, that is, when the changeover switch 26 is connected to the time setter 25 side and the internal circuit 27 is in the read state), it is also a latch circuit that latches.

As mentioned earlier, under normal conditions, the output count 1+M of the Y-axis counter 8 is sent to the adder circuit 20 via the selector switch 21.
As a result of the VC being sent, the latest received information is displayed on the display 14, but by switching the changeover switch 21 to the '+ii control section 22 side, the received information at the desired time is displayed. will be redisplayed. In other words, for example, if you want to re-display detected information 1 hour before the current time (2:10:0), first set 1:10:0 to the time setting device 25. . This number of seconds is 420
0 is the selector switch 26tll during the low level period of the pulse pulse.
≠ is led to the I memory circuit 27, and the stored value (this value, the output count of the Y-axis counter 8 1 hour before l) written in the corresponding 4200 location is continuously output and the latch circuit It is latched at 28. The latch value is the above setting 1111't
? J's history is the same. Then, this clay is passed through the changeover switch 2Hr and sent to the A circuit 20.
As a result of being added to the output count value of the u counter 19, a 1+m order signal is displayed on the display 14 from the received signal for 1 hour ii1. In this case, the output count value of the Y-axis counter 8 is still higher than the level M of the second pulse.

Uke 1B Ike point can be used to calculate the normal point backwards from Uke 100 time), and the related 1st grade can be further improved.

In this embodiment, all second pulses are used as manual pulses for the time counter 23, but pulses such as minute pulses and 10 minute pulses can also be used. That is, in such a case, the time setting device 25 will be set in units of minutes, units of 10 minutes, etc.

Further, FIG. 3 shows another embodiment of the Ado clothes display control section 22. As shown in FIG. In FIG. 2, as mentioned above, the output time of the time counter 23 is stored in the total storage circuit 27 of the output count of the Y-axis counter 8, but in this method, the output count of the Y-axis counter 8 is The difference is that the output time of the time counter 23 is written using the location as the address.

The third example will be described below.

After setting the time, the time counter 23 counts the second pulses from the frequency dividing circuit 24 and outputs the time, and the read time is sequentially led to the storage circuit 27. The memory circuit 27' is in a writing state only during the pulse output period (high level state) of the control pulse f6 generation circuit 2 that sends periodic pulses corresponding to the detection range, and the above output time is stored as the output of the Y Tsumugi counter 8 at that time. It is not like writing and storing at the address of the count value. Here, the output count value of the Y-axis counter 8 changes every time a control pulse is generated, so that the time of every incoming wave is stored. The thus stored times of each downward feed are sequentially read out by the readout counter 29 which is mounted on the machine at a relatively high speed as a readout address designation. The read counter 29 is configured to output a count value from 0 to (no-1) using the output suspension period (low level state) of the upper I control pulse.

The stored contents of each address read out sequentially, ie, time data, are sent to the comparison circuit 30. The comparison circuit 30 (-j:
& The number of seconds of the time is sent from the time setter to which the time to be re-displayed on the display 14 is set, and when this value matches the above-mentioned time data that can be read out sequentially, a coincidence pulse is sent. It is designed to output. Then, the coincidence pulse causes the output count 1 of the escape counter 29 of the sign V)-f: to be latched to the latch time 1 28. This results in the aforementioned case and co-worker.

Note that it is often not necessary to store the time during every wave transmission; for example, the time may be stored every other time and once every two times.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a storage circuit for explaining writing and reading operations. FIG. 2 is a circuit diagram showing one embodiment of the present invention. FIG. 3 is a circuit diagram showing another embodiment of the main part of the present invention Patent applicant Furuno Electric Co., Ltd.

Claims (2)

[Claims] (1) Repeatedly sending ultrasonic pulses into the water, receiving the return reflection waves, storing the return reflection waves sequentially over time, reading out the stored contents, and displaying them over time on the display. In an underwater detection display device configured to display a display by a display means, there is a display device consisting of a positive column of pixels, and a memory for at least no (>k) columns of printed rows in which reflected waves from the above-mentioned fluorescent light are stored. a first memory N path having the amount of data;
a second memory circuit for storing the column address at which writing is performed in the memory circuit; a setting means for setting the time to 1% of the past at the time interval >E; It is completely equipped with a readout means for reading out the corresponding column location of the first record/unique circuit in time, and means for guiding the output of the successive output means to the means for displaying the output over time on the display. above--at a particular time 7'1. ＋! F-type water shell detection device. (2) Repeatedly send out ultrasonic pulses into all the water, receive the returned reflected waves, distribute the returned reflected waves sequentially over time, read out the stored contents, and display them over time on the C display. Means V
The underwater detection bottom water device VC configured to display the above information includes a display device composed of m rows and columns of pixels, and a storage capacity for at least nolino (>k) columns in which the above-mentioned return reflected waves are stored. a first 8-pin memory circuit having one circuit, a time generator that generates a time or a signal corresponding to the time, and a first 8-pin memory Iu circuit that writes to the upper 6-pin memory Iu every time one or more waves are transmitted. a second memory circuit that stores the above-mentioned signal in a location corresponding to the leased land in the row; a time setter that sends out a signal corresponding to a particular time or time in the past; and the memory IjJ of 5g2 above. The signal read out from the second memory circuit and the signal sent from the time setter match each other. and a means for displaying the extracted designated address on the display over time; An underwater detection device +t, - characterized in that the received signal of the column address of the first storage circuit corresponding to the designated address is displayed sequentially over time.