JPH0354797B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention measures the underwater speed of an underwater moving object based on the Doppler effect generated by the reflected waves that emit ultrasonic waves from a ship into the ocean and reflect from the seabed or the ocean. This invention relates to a Doppler underwater speed measurement and display device.

(Prior art) This type of conventional device is composed of an underwater speedometer and an underwater speed display device, and emits ultrasonic waves from the underwater speedometer, processes the reflected waves reflected from the seabed or underwater, and processes the waves. I was trying to display them sequentially.

(Problem to be solved by the invention) In this way, the conventional device emits ultrasonic waves and sequentially processes and displays the reflected signals, so it is easy to understand changes in the current state from the past. It had some serious flaws.

(Means for Solving the Problems) In order to eliminate these drawbacks, the present invention analyzes the flow directions and flow velocities of multiple layers measured simultaneously, and plots the flow direction in a vector perspective view along the long axis from the center of the ellipse to the circumference of the ellipse. The flow velocity is displayed at each distance above, and each layer is arranged and displayed according to its measurement depth, and the current velocity is displayed at set time intervals from the past measurement to the current measurement depth. The flow direction and velocity of each layer at past points can be displayed at different positions on the display screen using an arbitrarily movable cursor line, making it possible to instantly recognize past conditions. This will be explained in detail below with reference to the drawings.

(Embodiment) FIG. 1 is a block diagram according to an embodiment of the present invention, in which numeral 1 denotes an underwater speedometer and a signal processor that processes various signals of the underwater speedometer. 2 is a transducer that radiates the signal from the signal processor into the water and receives the reflected signal from the sea or the seabed. is an underwater speed display device, and 3 is an underwater speedometer interface circuit that connects the underwater speedometer and the underwater speed display device. 4 is a central processing unit (hereinafter referred to as CPU) that processes the signal sent from the underwater speedometer interface circuit; 5 is the first
A memory circuit (hereinafter referred to as ROM), 6 a second memory circuit (hereinafter referred to as RAM), 7 an interface circuit that inputs panel switch information to the CPU 4,
8 is a panel switch, 9 is a display conversion circuit, and 10 is a cathode ray tube display.

Next, the operation will be explained with reference to the display example shown in FIG. First, ultrasonic waves are emitted from a signal processor 1 that processes various signals from an underwater speedometer through a transducer 2. The reflected ultrasonic waves from the sea or the seabed are sent to the signal processor 1 through the transducer 2. The gyroscope signal is also sent to the signal processor 1 and becomes the basis of the azimuth signal, these signals are combined and calculated by the signal processor 1, and the signal processing output is sent to the underwater speedometer interface circuit 3 and input to the CPU 4.
The CPU 4 reads the setting status of the panel switch 8 via the panel input interface circuit 7, and
This is stored in RAM6. Next, the CPU 4 performs calculation processing according to the program stored in the ROM 5.
It is output to the display conversion circuit 9. This display conversion circuit 9
converts these signals into video signals and outputs them to the cathode ray tube display 10. The above is the data displayed on screen A in Figure 2, such as the current direction and current velocity at depths of 10, 50, and 100 set by panel switch 8, ship speed, course, gyroscope direction, etc. is displayed, showing the current data.

Next, the signal processing so far is repeated, and the CPU 4 stores the signal in the RAM 6. On the other hand ROM
The settings of the panel switch 8 and the flow direction and flow velocity data of each layer are sent from the RAM 6 to the CPU 4, which calculates and processes them according to the program that displays each layer as an ellipse and displays the display conversion circuit. 9 to the cathode ray tube display 10 and displayed as shown in screen B. Here, the distance on the major axis from the center of the ellipse to the circumference of the ellipse represents the flow velocity, and the perspective view of a vector drawn outward from the center of the ellipse represents the flow direction. Further, each layer is arranged on the same axis at a position corresponding to the water depth.

Next, an example of displaying the magnitude of the flow direction and flow velocity of each layer by moving the cursor line will be described, but the signal flow is the same as described above. Cursor line F is set with panel switch 8 and selected from panel input interface 7 via CPU 4 and RAM 6.
Data is input to CPU4. The calculation is processed by CPU 4 and displayed as shown in screen C. The flow direction and flow velocity at the position of the cursor line are determined by straight lines drawn outward from the center of each layer on the same circle, the length of which represents the magnitude of the flow velocity, and the direction of which represents the flow direction. Further, the flow direction and flow velocity magnitude in each layer are also displayed below the circle as shown in screen D. In this way, the past flow direction and flow velocity are shown on the same circle, making it easy to understand their trends.

(Effects of the Invention) As explained above, the present invention allows the flow direction and flow velocity of each layer to be determined at a glance by moving the cursor line in accordance with the program in the ROM 5 and the contents stored in the RAM 6 for each time in the past to know changes over time. I can do it. In addition, since the screens are displayed on the same screen, complicated display conditions are eliminated, and the movement of the tide at the fish grounds can be easily grasped, thereby increasing the effectiveness of catching fish.

[Brief explanation of drawings]

FIG. 1 is a block diagram according to an embodiment of the present invention, and FIG. 2 is an explanatory diagram showing an example of a display screen of a Doppler underwater velocity measuring device. DESCRIPTION OF SYMBOLS 1... Signal processor, 2... Transmitter/receiver, 3... Underwater speed interface circuit, 4... Central processing unit (CPU), 5... First memory circuit (ROM), 6...
...Second memory circuit (RAM), 7...Panel input interface circuit, 8...Panel switch, 9
...display conversion circuit, 10... cathode ray tube display.

Claims (1)

[Claims] 1. In a device that emits ultrasonic signals underwater and measures the underwater speed of an underwater moving object, etc. from reflected waves from the seabed and underwater and gyroscope signals, a means for setting the measurement depth of arbitrary multiple layers, and the setting means for storing the values and specifying them in the signal processor of the underwater speedometer; means for calculating and processing the flow direction and flow velocity values in the absolute azimuth system with the signal processor; The central processing unit calculates and processes the flow directions and flow velocities of multiple layers simultaneously measured, with the measurement depth as the vertical axis and the center at the position corresponding to the measurement depth, and the flow direction touching the tip of the vector in a perspective view of the vector. Means for converting the display so that the flow velocity is displayed as the distance on the long axis from the center of the ellipse to the circumference of the ellipse, and the flow velocity from the past measurement to the current measurement is displayed side by side with time intervals on the horizontal axis. , a vertical cursor line that can be moved arbitrarily in the horizontal direction is provided on the display on the screen, and the flow direction and velocity for the depths of multiple layers measured in the past at the cursor line position are displayed at different positions on the display screen. What is claimed is: 1. A Doppler underwater speed measurement and display device, characterized in that it is equipped with means for converting the display into a display.