JP5891466B2 - Ultrasonic detection system - Google Patents

Description

  The present invention relates to an ultrasonic detection system that is installed on a breakwater or an exploration ship, detects the movement of an underwater object (jellyfish), and automatically outputs an alarm.

Conventionally, there are various underwater detection devices represented by a fish finder as a method for detecting underwater using ultrasonic waves. Among them, accidents due to clogging of the intake of the power plant due to jellyfish moving so as to drift underwater occurred frequently, which became a big problem. In order to deal with this problem, the applicant has proposed an apparatus for detecting jellyfish as soon as possible. In this proposed ultrasonic jellyfish detection system, as shown in FIG. 7, a jellyfish access warning device 2 is installed on the breakwater 1, a personal computer 3 is mounted on the jellyfish access warning device 2, and a support member 4 is mounted on the breakwater 1. Then, the rotating device 5 is mounted on the support member 4, and the transmitting / receiving array 6 is mounted on the rotating device 5, so that ultrasonic waves are transmitted / received from the transmitting / receiving array 6 to the underwater 7.

  When using a ship, as shown in FIG. 8, the jellyfish approach alarm device 2 is installed on the ship 8, the personal computer 3 is mounted on the jellyfish approach alarm device 2, and the support member 4 is installed on the shore side of the ship 8. The rotating device 5 is mounted on the support member 4, the transmitting / receiving array 6 is mounted on the rotating device 5, and ultrasonic waves are transmitted / received from the transmitting / receiving array 6 to the underwater 7.

  The transmission / reception array 6 has a fan shape, but in order to improve the reception sensitivity and the S / N ratio, as shown in FIG. 9, the ultrasonic transducers 6a1, 6a2, ... 6a94, 6a95, 6a96 arranged in a fan shape. These 96 elements are connected to transmission / reception circuits 6b1, 6b2,... 6b94, 6b95, 6b96, respectively, and the main amplifier 6c is connected to these transmission / reception circuits 6b1, 6b2, ... 6b94, 6b95, 6b96. The A / D converter 6d is connected to the main amplifier 6c, the output of the A / D converter 6d is input to the control circuit 9 comprising a CPU, the output of the control circuit 9 is transmitted to the personal computer 3, and As shown in FIG. 10, it starts from the ultrasonic transducer 6a1, but is simultaneously transmitted and received by the adjacent 8 elements 6a1, 6a2,. Then, go shifting to the right by one element, and finally to form the 89 scanning lines in total of 6A89,6a90,6a91,6a92,6a93,6a94,6a95,6a96, making one frame.

  By repeating this operation of acquiring one frame, images of a large number of frames can be acquired, and an image in which the jellyfish approaches can be obtained from these images, and the jellyfish 11 is displayed on the display screen 3a of the personal computer 3. From this display, it is possible to confirm the approach of the jellyfish and generate an alarm signal.

  However, in the conventional jellyfish detection system configured as described above, 96 elements of 96 ultrasonic transducers 6a1, 6a2,... 6a94, 6a95, 6a96 are used to acquire an image of one frame. Since each of them is driven by eight and then shifted one by one in order, there is a disadvantage that it takes a very long time.

JP 2009-244002 A

  The problem to be solved is that in the conventional jellyfish detection system, 96 elements of 96 ultrasonic transducers 6a1, 6a2,... 6a94, 6a95, 6a96 are used to acquire an image of one frame. Since each of them is driven by eight and then shifted one by one in order, it takes a very long time.

  The present invention is arranged in a personal computer, a USB input / output circuit as a connection circuit to the personal computer, a control circuit connected to the USB input / output circuit, and a fan shape to which an oscillation signal is sent from the control circuit. A large number of ultrasonic transducers, a transmission / reception circuit connected to each of the large number of ultrasonic transducers, a main amplifier connected to the transmission / reception circuit, and an A signal for converting an echo signal from the main amplifier into a digital signal / D converter and a personal computer connected via the control circuit connected to the A / D converter, and the first ultrasonic transducer, the transmission / reception circuit, and the A / D converter are the first. , Divided into second groups, and simultaneously drives a predetermined number of the first group N1 and the same number as the number of the second groove N2, and sequentially shifts them one by one. The echo signals obtained by driving are sequentially stored in the personal computer, and the ultrasonic transducers, transmission / reception circuits, and A / D converters are divided into first and second groups, The predetermined number of the first group N1 and the same number as the number of the second group N2 are alternately driven, and the echo signals obtained by sequentially driving one by one are sequentially stored in the personal computer. In addition, by inputting a plurality of echo data stored in the memory to a personal computer, a grouping function for grouping, and an output data signal grouped by the grouping function are input. An upper limit gate function that cuts a predetermined upper limit value and an output data signal output from the upper limit gate function are input. Therefore, a lower limit gate function for cutting a predetermined lower limit value, a first determination function for determining whether or not the output data signal output from the lower limit gate function is greater than a predetermined specified value, An alarm signal is output from the second determination function for determining whether the output data signal output from the lower limit gate function exists for a predetermined time or more, the first determination function, and the second determination function. An alarm function that outputs an alarm signal when there is an alarm, and an alarm device that generates an alarm sound by the alarm signal from the alarm function is connected to the personal computer.

In the ultrasonic detection system of the present invention, N (for example, 96) ultrasonic transducers are divided into two groups with the same number, and the first m (for example, eight) of the first group N1 and the first group. Driving the first m of the two grooves N2 alternately one by one, or driving the first m (for example, eight) of the first group N1 and the first m of the second groove N2 simultaneously, Since the next m (e.g., 8) of the first group N1 and the next m of the second groove N2 are sequentially driven by shifting one by one sequentially, the signal of one frame is acquired. , Ki may construct a frame in half the time with respect to conventional jellyfish detection systems, also can quickly detect the approach of the jellyfish, there is an advantage that can be observed in a short time.

FIG. 1 is a block diagram of an ultrasonic detection system according to an embodiment of the present invention. FIG. 2 is an explanatory diagram for explaining the operation of the ultrasonic detection system of FIG. FIG. 3 is a block diagram of an ultrasonic detection system according to another embodiment of the present invention. FIG. 4 is an explanatory diagram for explaining the operation of the ultrasonic detection system of FIG. FIG. 5 is a block diagram of signal processing of the ultrasonic detection system according to the embodiment of the present invention. FIG. 6 is a flowchart for explaining the signal processing operation of the ultrasonic detection system of FIG. FIG. 7 is a schematic configuration diagram of an ultrasonic jellyfish detection system installed on a conventional breakwater. FIG. 8 is a schematic configuration diagram of an ultrasonic jellyfish detection system installed on a conventional ship. FIG. 9 is a block diagram of a conventional ultrasonic jellyfish detection system. FIG. 10 is an explanatory diagram for explaining the operation of a conventional ultrasonic jellyfish detection system.

  The present invention relates to a jellyfish access warning device, a personal computer, a transmission / reception array, a transmission / reception circuit connected to each of these transmission / reception arrays, a main amplifier connected to the transmission / reception circuit, a main computer, It is composed of a memory connected to an amplifier, and N (for example, 96) of a large number of ultrasonic transducers in the transmission / reception array are divided into two groups, and the first m (for example, 8) in the first group N1 The first m pieces of the second groove N2 are simultaneously driven and sequentially shifted one by one, or are alternately driven and sequentially shifted one by one. Stored in the memory and sequentially input to the personal computer, and the echo signals from the m memories are grouped by the personal computer. By signal processing the flop of echo signals, to determine whether or not a jellyfish or jellyfish, to confirm the presence of jellyfish.

FIG. 1 is a block diagram of an ultrasonic jellyfish detection system according to an embodiment of the present invention. 6a1, 6a2,... 6a95, 6a96 are ultrasonic transducers for receiving transmission signals from the control circuit 9, 6b1, 6b2, ... 6b95, 6b96 are the transmission / reception circuits connected to the ultrasonic transducers 6a1, 6a2, ... 6a95, 6a96, respectively. 6c is the main transmission / reception circuit 6b1, 6b2, ... 6b95, 6b96. An amplifier, 6d is an A / D converter connected to the main amplifier 6c, 9 is a control circuit connected to the A / D converter 6d, 3 is a personal computer connected to the control circuit 9, and these configurations are as described above. are the same as the conventional example, description is omitted, in the present invention, the ultrasonic transducer 6a1,6a2, ···, 6a48 ultrasonic transducer 6a 49, ···, 6a96 of 2 As shown in FIG. 2, the oscillation signal is transmitted from the control circuit 9 to the transmission / reception circuits 6b1 to 6b8 connected to the eight ultrasonic transducers 6a1 to 6a8 of the group 1 in the first time, The oscillation signal is transmitted from the control circuit 9 to the transmission / reception circuits 6b46 to 6b53 of the eight ultrasonic transducers 6a46 to 6a53 in the group 2 in the second time, and shifted to one in the third time, and the eight supergroups in the group 1 are shifted to one. An oscillation signal is transmitted to the transmission / reception circuits 6b2 to 6b9 connected to the ultrasonic transducers 6a2 to 6a9 , and the transmission / reception signals connected to the eight ultrasonic transducers 6a41 to 6a48 of the group 2 are shifted by one in the fourth time. circuits 6b41 to ~ 6B48 from the control circuit 9 so that to transmit the oscillation signal, alternately an ultrasonic transducer 6a1~ 6a48 and ultrasonic transducer 6a49 ~6a96 group 2 group 1 one by eight The oscillation signal is transmitted, and further transmitted and received sequentially shifted one by one. The transmitted and received ultrasonic echo signals are received by the transmission / reception circuits 6b1 to 6b48 and the transmission / reception circuits 6b449 to 6b96 and transmitted to the main amplifier 6c, Amplified by the main amplifier 6 c and converted from analog to digital echo signal by the A / D converter 6 d, the converted digital echo signal is input from the control circuit 9 to the personal computer 3.

Thus transmission, the wave transceiver circuit 6b1~6b48 connected to the ultrasonic transducer 6a1~ 6a48 of group 1, an oscillation signal to the reception circuit 6 b49 ~6b96 connected to a group 2 of transducing circuit 6a49 ~6a96 by, by transmitting and receiving ultrasonic waves from the ultrasonic vibrator location remote, since no ultrasonic waves are interference, it is transmitted and received between the ultrasonic transducer 6a1~ 6 a48 by the ultrasonic transducer 6a49 ~6a96 Ultrasonic waves are transmitted and received promptly.

  FIG. 3 is a block diagram of an ultrasonic jellyfish detection system according to another embodiment of the present invention. 6a1, 6a2,.6a47,6a48Is the first group of ultrasonic transducers,6b1, 6b2, ...6b47,6b48IsSecondGroup of ultrasonic transducers,6a1, 6a2, ...6a 47,6a48Transmitting and receiving circuits connected to each,6a49,6a50,... 6a95 and 6a96 are the second group of ultrasonic transducers,6b49,6b50... 6b95 and 6b96 are the second group of ultrasonic transducers6a49,6a50,... 6a95, 6a96 are connected to the transmitting / receiving circuits, respectively, 6c1 is a transmitting / receiving circuit 6b1, 6b2,.6b4 8The main amplifier 6c2 connected to the6b49,6b50The main amplifier connected to 6b96, 6d1 is an A / D converter connected to the main amplifier 6c1, 6d2 is an A / D converter connected to the main amplifier 6c2, and 9 is an A / D converter 6d1. , 6d2 is a control circuit, and 3 is a personal computer connected to the control circuit 9. Since these configurations are the same as in the above embodiment, the description is omitted, but in the present invention, as shown in FIG. In addition, an oscillation signal is transmitted from the control circuit 9 to the transmission / reception circuits 6b1 to 6b8 connected to the eight ultrasonic transducers 6a1 to 6a8 of the group 1 at the first time, and the eight signals of the group 2 at the same time at the first time. Ultrasonic transducer6a49~6a56Transmitter / receiver circuit6b49~6b56The oscillation signal is transmitted from the control circuit 9 to the transmission / reception circuits 6b2 to 6b9 connected to the eight ultrasonic transducers 6a2 to 6a9 of the group 1 by shifting by one in the second time. Transmitting and receiving circuit connected to eight ultrasonic transducers 6a49 to 6a56 of group 2 by shifting one by one at the same time at the second time 6b49~6b56Group 1 ultrasonic transducers 6 a 1 to 6, such as transmitting an oscillation signal from the control circuit 9.6a48And group 2 ultrasonic transducers6a49~ 6a96ofEight oscillation signals are transmitted from the control circuit 9 at the same time, and further transmitted one after another while being shifted one by one. The transmitted and received ultrasonic echo signals are transmitted and received by the transmission / reception circuits 6b1 to 6b1.6b48And transmission / reception circuit6b49To 6b96, transmitted to the main amplifiers 6c1 and 6c2, amplified by the main amplifiers 6c1 and 6c2, and converted from analog to digital echo signals by the A / D converters 6d1 and 6d2, and the converted digital echo signals are Input from the control circuit 9 to the personal computer 3.

  Thus, the ultrasonic transducers 6a1 to 6a1 in group 16a48Transmitter / receiver circuit 6b1- connected to6b48And group 2 ultrasonic transducers6a49By transmitting an oscillation signal to the transmission / reception circuits 6b49 to 6b96 connected to -6a96, the ultrasonic waves are not interfered by transmitting / receiving the ultrasonic waves from the ultrasonic transducers at remote positions. Vibrator 6a1 6a48And ultrasonic transducer6a49The ultrasonic waves transmitted / received by 6a96 are transmitted / received promptly.

In the ultrasonic jellyfish detection system configured to be divided and driven as described above, when the output data of the memory 6e is input to the personal computer 10 as shown in FIG. For example, the grouping functions 10a1 to 10an (for example, n = 12) of the personal computer 10 are input so that the output data of these grouping functions 10a1 to 10an is an upper limit gate function 10b1, 10bn, respectively, and the outputs of the upper limit gate functions 10b1 to 10bn are respectively input to the lower limit gate functions 10c1, 10c2,..., 10cn, and the lower limit gate functions 10c1, 10c2, ... The output of 10cn is the first discrimination function 10d and the second discrimination Are input to the ability 10e, the output of the first determination function 10d and a second determination function 10e is input to the alarm function 10f, the output of the alarm function 10f is output to the alarm 11.

Next, it described with reference to the flowchart of FIG. 6 the operation of the personal computer 10 of FIG. First, when the personal computer 10 is started, the output data of the memory 6e is input to the grouping functions 10a1, 10a2,. The output data signals that are grouped to become data (step 1) and output from the grouping functions 10a1 to 10an are upper limit value gate functions 10b1, 10b2 for cutting output data signals that are equal to or higher than a predetermined upper limit value, respectively. ..., 10bn cuts strong reflected waves reflected from fish and other reflectors (step 2), and then lowers the output data below a predetermined lower limit. By passing through the gate functions 10c1, 10c2,. The reflected wave is cut (step 3), and the strong reflection signal is cut at the upper limit gate functions 10b1, 10b2,..., 10bn, and the weak reflection is performed at the lower limit gate functions 10c1, 10c2,. When the output data signal with the wave cut is input to the first discrimination function 10d, the first discrimination function 10d has more output data signals with the upper limit value and the lower limit value cut than predetermined predetermined numerical values. If it is less, it is determined that there are a small number of jellyfishes, and the process returns to step 1 and is not input to the alarm function 10f. If the number is greater than a predetermined number, a warning signal is sent to the alarm function 10f. When the input data is input (step 4) and the output data signal from which the upper limit value and the lower limit value are cut is input to the second determination function 10e, the upper limit value and the lower limit value are cut. It is determined whether or not the output data signal exists for a predetermined time or more. If the output data signal does not exist for the predetermined time or more, the process returns to Step 1 as an object other than a jellyfish having a high moving speed (Step 5). If it exists for a predetermined time or longer, an alarm signal is input from the second discrimination function 10e to the alarm function 10f (step 5), and both the first discrimination function 10d and the second discrimination function 10e are input. The alarm signal is output from the alarm function 10f only when an alarm signal is input from the alarm function 10f to the alarm function 10f (step 6), the alarm sound is generated from the alarm device 11 due to the signal, and a large amount of jellyfish is generated. Alarm.

  In the present invention, the ultrasonic transducer 6 is divided into two groups and transmitted / received as described above, whereby the measurement time can be shortened, and the reflected wave data received by the ultrasonic transducer 6a is stored in the memory. 6e, a plurality of (m) signals of the control circuit 9 are input to the grouping function 10a as one signal, grouped, and the grouped signals are input to the upper limit gate function 10b. By cutting the strong reflected wave reflected from the fish and other reflectors, and then inputting to the lower limit gate function 10c, the weak reflected wave such as noise is cut, and the upper limit value and the lower limit value are cut. By inputting the output data into the first determination function 10d, it is determined whether or not the output data with the upper limit value and the lower limit value cut is larger than a predetermined value, If it is determined that it is a jellyfish, an alarm signal is output to the alarm function 10f, and when the output data with the upper limit value and lower limit value cut is input to the second determination function 10e, the time exceeds a predetermined time. If it exists for a predetermined time or more, it is determined as a jellyfish having a slow moving speed, an alarm signal is output to the alarm function 10f, and the first and second determination functions 10d, Only when an alarm signal is input to both of the alarm devices 10e, a signal is output from the alarm function 10f to the alarm device 11, and an alarm sound is generated from the alarm device 11.

  In the present invention, the ultrasonic transducer 6an (hereinafter referred to as n = 96), the transmission / reception circuit 6bn, the main amplifier 6cn, and the memory 6dn are divided into two groups, respectively. Time can be 4 times faster. In the above embodiment, the jellyfish detection system has been described. However, it can be used as another detection system such as a fish school, sand and pebbles that move underwater by rocking or flowing water, and a piece of wood floating underwater.

6a1 to 6a96 Ultrasonic transducer 6b1 to 9b96 Transmission / reception circuit 6c, 6c1, 6c2 Main amplifier 6d, 6d1, 6d2 A / D converter 6e Memory 9 Control circuit 10 Personal computer 11 Alarm

Claims (3)

Numerous ultrasonic vibrator is immersed in water, a number of the wave transceiver circuit connected respectively to said multiple ultrasonic transducers, a main amplifier connected to the wave transceiver circuit of said multiple, to the main amplifier and connected to the a / D converter consists of a control circuit connected to said a / D converter, a control circuit connected to a personal computer, the plurality of transmission and reception between the plurality of ultrasonic transducers The first and second groups N1 and N2 are connected to two main amplifiers, and the two main amplifiers are connected to two A / D converters, respectively, and the two A / D converters are connected. vessel is connected to the one control circuit, originating signal from said control circuit to wave transceiver circuit and the ultrasonic transducer of the ultrasonic transducer and the wave transceiver circuit and the pre-Symbol second groove N2 of the first group N1 simultaneously It is transmit, further, the respective Sequentially storing the echo signals from the water in the memory of the personal computer by entering the shift in groups N1 and N2 one by one respectively to monitor multiple portions personal computer, the echo signal stored in the memory Are sequentially read, and a jellyfish is judged from the echo signal . A large number of ultrasonic transducers immersed in water, a large number of transmission / reception circuits connected to the large number of ultrasonic transducers, a main amplifier to which the large number of transmission / reception circuits are connected, and the main an a / D converter connected to the amplifier, consists of a control circuit connected to said a / D converter, and a personal computer connected to the control circuitry, input from the ultrasonic vibrator et A grouping function for grouping a plurality of code signals into a personal computer, and an upper limit gate for cutting an upper limit value determined in advance by inputting an output data signal grouped by the grouping function A lower limit gate function that cuts a predetermined lower limit value by inputting an output data signal output from the upper limit value gate function, and the lower limit value gain. First and discrimination function output data signal output from the preparative function determines whether more than the value of a predetermined prescribed time or more output data signal output from the lower limit gate function is predetermined A second discriminating function for judging whether the alarm signal is present, and an alarm function for outputting an alarm signal when there is an alarm signal from the first discriminating function and the second discriminating function, Ultrasonic detection system. An alarm device that generates an alarm sound in response to an alarm signal from the alarm function is the personal computer. The ultrasonic detection system according to claim 2, wherein the ultrasonic detection system is connected.

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