JPS5922545Y2 - relative position display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a relative position display device that measures the position of a target from a ship and displays the position of the target along with the silhouette of the ship.

In order to know the position of the target, at least three delivery devices are installed on the ship's side, and the direct distance is determined from the difference in time between the transmission reference and arrival, and the horizontal distance and depression angle to the target is measured from the difference in arrival time of each delivery device. Devices for displaying the location of objects on a CRT have already been implemented.

In other words, this device connects a target object and the above-mentioned ship that are driven by a trigger signal sent out from a ship in which at least three receivers are installed in a predetermined positional relationship to send out a predetermined sound wave signal. This is a device that displays the relative positional relationship of

However, during measurement, a trigger signal is sent out from the ship to cause the target object to send out a sound wave signal, and this sound wave signal is received by the above-mentioned wave receiver.

At this time, if you measure the time difference between the trigger signal transmission (transmission reference) and the reception reference at which the ship's receiver receives the sound wave signal, and the time difference (including phase difference) between the signals input between each receiver, Since the distance and azimuth from the ship to the target can be determined by simple geometric calculations, this relationship can be displayed on a display such as a CRT.

In conventional display devices of this type, only the position of the target is
Many are displayed on RT.

Some display a ship's shadow at the center of the CRT, but the display is mechanical and the size of the ship's shadow remains unchanged even when the range of the scope is changed.

Therefore, it has been difficult to intuitively recognize the position of a target by looking at a CRT.

The purpose of the present invention is to display the relative position of a ship and a corresponding target on the sea, that is, to display the relative position of the ship in such a way that when the target is relatively close, the shadow of the ship on the display device is enlarged. The purpose of this invention is to provide a display device.

In order to achieve the above purpose, the relative position display device according to the present invention measures the distance and direction to a target object with the ship as the center, and calculates the positional relationship between the ship and the target object using a magnification (
scope range) A relative position display device that displays a relative position with a variable scope range, comprising: a ship shadow signal generation circuit for displaying the ship's shadow; a circuit that variably adjusts the amplitude of the ship shadow signal in accordance with the scope range; and the ship's shadow. It is characterized by comprising a circuit for synthesizing a signal and a relative position signal of a target object, and a display for displaying the synthesized signal.

According to the above configuration, it is possible to display a display that maintains the relative relationship between the size of the ship and the distance to the target object.

Therefore, since the relationship between the positions and distances can be grasped intuitively, the object of the present invention is completely achieved.

Next, the present invention will be explained in more detail with reference to the drawings and the like.

FIG. 1 is a diagram showing a display state of a display device, a CRT, of an apparatus according to the present invention.

FIG. 1A shows the display state when the target is located relatively far from the ship, and FIG. 1B shows the display state when the target is close to the ship.

In each figure, the display magnification (range) is changed, and by correspondingly changing the magnification of the size of the ship's shadow, it is possible to intuitively grasp the position of the target object in relation to the ship's shadow.

FIG. 2 is a block diagram of the display signal generation circuit according to the present invention.
FIG. 3 is a waveform diagram for explaining the operation of the above circuit.

In FIG. 2, the area surrounded by a broken line A indicates the width adjustment area of the ship's shadow.

The oscillator 2 is an oscillator for forming a ship's silhouette, and its oscillation waveform is shown in FIG. 3C.

The integrating circuit 3 is a circuit that generates a waveform forming the ship's side, and performs integration during the gate period of the ship's shadow gate generator 1 to create the shape of the ship's side.

FIG. 3 shows the output waveform of the ship shadow gate generator 1, and FIG. 3d shows the output waveform of the integrating circuit 3.

A modulator 4 modulates the output of the oscillator 2 with the output of the integrating circuit 3.

The modulated output waveform is shown in FIG. 3e. The variable resistor 5 is a variable resistor for adjusting the ship width to adapt the ship width to the range scale.

In FIG. 2, the part surrounded by the broken line indicated by B is the captain adjustment part of the ship's shadow.

The gate signal from the ship's shadow gate generator 1 is integrated by a linear integrator 6 and level-shifted by a level shift circuit 7.

The feedback resistor 8 of the amplifier is used as a variable resistor for adjusting the ship's length.

The output waveform of the ship length adjustment section is shown in Fig. 3j.

Corresponding to the blocks A and H, circuit blocks C and D are provided for variably adjusting the amplitude of the ship image signal.

In FIG. 2, the portion surrounded by the broken line C is a mixing circuit portion that synthesizes or mixes the X-axis component of the distance signal and the X-axis component of the ship shadow signal.

An analog signal, which is the X component of a distance signal obtained by processing outputs between receivers (not shown), is input to a range switching circuit 10 from an input terminal 9.

The circuit 10 uses an attenuator to attenuate the input signal in accordance with the range.

The distance signal gate generation circuit 11 generates the gate signal shown in FIG. 3g.

The linear integration circuit 12 integrates the output of the range switching circuit 10 to the gate 1 during the period.

FIG. 3f shows the output waveform of the linear integration circuit 12.

Output of the ship width adjustment part A of the ship shadow mentioned above (see Figure 3 e)
is applied to the ship shadow range switching circuit 13.

Attenuation corresponding to the range is performed here.

The output of the linear integration circuit 12 and the output of the switching circuit 13 are combined in a mixing circuit 14.

The output waveform of the mixing circuit 14 is shown in Figure 3.

This output is applied to the X-axis of the CRT.

In FIG. 2, a portion surrounded by a broken line indicated by D is a mixing circuit portion for mixing the y-axis component of the distance signal and the y-axis ship shadow signal.

An analog signal, which is the y component of a distance signal obtained by processing outputs between receivers (not shown), is input from an input terminal 15 to a range switching circuit 16.

An attenuator included in circuit 16 attenuates the human input signal in response to the range.

The linear integration circuit 17 integrates the output of the circuit 16 during the gate period of the distance gate 11 described above.

FIG. 3g shows the output waveform.

Output of the captain adjustment part B of the ship shadow mentioned above (see Figure 3 j)
is input to the ship shadow range switching circuit 18 and is attenuated according to the range.

The output of the circuit 18 and the output of the linear integration circuit 17 described above are
The y component is mixed in a mixing circuit 19.

3 shows the output waveform of circuit 19 of FIG. 3i.

This output waveform is applied to the y-axis of the CRT.

Since the device according to the present invention is constructed as described above, the size of the ship's shadow on the display device changes in response to range switching.

Since it is sufficient to add a circuit for generating a ship shadow and a circuit for mixing or synthesizing components in each direction to a conventional device, the device does not become complicated for the patent applicant.

In the above explanation, the generation of the ship's shadow signal is performed using an analog circuit of integral smuggling, but it can be similarly realized using a digital circuit by storing the ship's shadow signal in a ROM in advance.

In other words, it should be understood that the most significant feature of the present invention is that the size of the ship's shadow is variably displayed in response to range switching.

Various modifications can be made to the embodiments described in detail above within the scope of the present invention.

The scope of the present invention extends to all of the claims for utility model registration, including such modifications.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram for explaining the display state of the display device according to the present invention, FIG. 2 is a block diagram showing an embodiment of the display signal generation circuit of the device according to the present invention, and FIG. 3 is the diagram shown in FIG. FIG. 3 is a waveform diagram for explaining the operation of the circuit. DESCRIPTION OF SYMBOLS 1... Ship shadow gate generator, 2... Oscillator, 3... Integral circuit for curved ship shape, 4... Modulator, 6... Curved straight line integral circuit, 10 .16... Range switching circuit, 11... Distance signal gate generation circuit, 12.17... Curved line integral circuit, 13.18...
...Range switching circuit, 14.19...Synthesis or mixing circuit.

Claims (1)

[Scope of utility model registration request] A relative position display device that measures the distance and direction to a target with a ship as the center, and relatively displays the positional relationship between the ship and the target with variable magnification (scope range) in the distance direction. a ship shadow signal generation circuit for displaying a ship shadow; a circuit for variably adjusting the amplitude of the ship shadow signal in accordance with the scope range; a circuit for synthesizing the ship shadow signal and a target object relative position signal; 1. A relative position display device comprising: a display device that displays a signal.