JPS63304187A - Distance measuring instrument - Google Patents

Abstract

PURPOSE:To simply measure a distance to a target by providing an image pickup function, and a measuring function of an angle of tip in a visual field at the time of image pickup and a depression/elevation angle to a visual field of the horizon in an image pickup picture plane and the target of the surface of the earth. CONSTITUTION:An image processing part 3 executes a detection of the horizon, a measurement of an angle of tip based on a visual field azimuth of its detected horizon as a reference, and a measurement of the angle of tip based on a visual field azimuth of a designated target as a reference. The horizon angle of tip calculating part 5 calculates the angle of tip on the horizon from a visual field azimuth angle signal inputted from a visual field azimuth control detecting part 4, and the signal of the angle of tip on the horizon based on a visual field azimuth inputted from the processing part 3 as a reference. A target angle of tip calculating part 6 calculates the angle of tip at a designated target from a signal inputted from the detecting part 4, and the signal of the angle of tip at the designated target based on a visual field azimuth inputted from the processing part 3 as a reference. A target distance calculating part 7 calculates a distance to the designated target from signals of the calculating parts 5, 6.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention provides a method for detecting a horizon and a target that can be obtained by an imaging device without adding active devices for distance measurement such as radar and laser to the imaging device. This invention relates to a device that calculates the distance to a target on the ground based on the angle of elevation.

[Conventional technology]

What is a passive imaging device that has a distance measurement function?

Not conventional.

[Problem that the invention seeks to solve]

BACKGROUND ART Conventionally, an imaging device and a laser distance measurement device are paired to obtain imaging and distance measurement functions.

An object of the present invention is to provide a simple device that can obtain the distance to a target on the ground from the respective elevation angles of the horizon and the target on the ground obtained from an imaging device.

[Means for solving problems]

The Ukuyo 1 type range finder according to the present invention has an imaging function, a function of measuring the elevation angle of the field of view at the time of imaging, and a function of measuring the elevation angle with respect to the field of view between the horizon in the imaging screen and the target on the ground surface, to determine the distance to the target. It is designed to calculate.

[Effect]

The imaging function in this invention is for detecting the horizon and specifying and tracking a target, and the measurement of the elevation angle of the horizon is for calculating the altitude of an observation point.

The distance at the target point is calculated from the calculated altitude of the observation point and the measured elevation angle of the target.

〔Example〕

An embodiment of this invention will be described below.

In FIG. 1, (1) is an imaging unit, and (2) is a target designation tracking unit that adds a designation symbol to a target in an image signal input from the imaging unit and tracks the designated target.

(3) is an image processing unit that detects the horizon, measures the elevation angle based on the visual field direction of the detected horizon, and measures the elevation angle based on the visual field direction of the specified target; (41 is the imaging unit (1) A viewing azimuth angle signal section that controls the viewing azimuth and measures the viewing azimuth, and (5) a viewing azimuth angle signal input from the viewing azimuth control detection section (4) and an image processing section (1).
(3) is a horizon elevation angle calculation unit that calculates the elevation angle of the horizon from the horizon elevation angle signal based on the visual field direction input from (6), and (6) is the visual field direction input from the visual field direction control detection unit (4). a target elevation angle calculation unit that calculates the elevation angle of the specified target from the angle signal and the elevation angle signal of the specified target based on the visual field direction input from the image processing unit (3); and (7) a horizon elevation angle calculation unit. A target distance calculation unit (8I is This shows an image i&! display section that displays the captured image signal to which a designation symbol for the target is added, which is input from the target designation tracking section (2), and the target distance signal, which is input from the target distance calculation section (7). be.

FIG. 2 shows the principle of this invention. In Figure 2, A is the observation point, B is the horizon as seen from point A, C is the target point, and D is the ground point directly below point A.

0 is the center of the earth, ψ1 and ψ2 are the elevation angles of the horizon and target point from the observation point, θ1 and θ2 are the elevation angles of the horizon and the observation point from the center of the earth, rO is the radius of the earth, h is the observation point When the height is , the following equation holds true.

ψ1+01=: -il+rO (+1 +21 According to +31 formula, the distance to the target point can be calculated from the elevation angle between the horizon and the target point as shown in the following formula.

〔Effect of the invention〕

As described above, according to the present invention, the distance measurement function can be obtained by using the elevation and elevation angle distance measurement function between the horizon and the target point during imaging, thereby enabling simple and covert distance measurement.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention. FIG. 2 is a diagram showing the principle of this invention. In the figure. (1) is an imaging unit, (2) is a target specification tracking unit, (3) is an image processing unit, (41 field of view direction control detection unit, (5) and (
6) is a horizon elevation angle calculation unit and a target elevation angle calculation unit, (7
) is a target distance calculation section, and (8) is an image display section.

Claims (1)

[Claims] an imaging section; a target designation tracking section that receives an image signal output from the imaging section and manually specifies a target image included in the input image signal; and automatically tracks the designated target image; The viewing direction is manually controlled, the target image tracking signal output from the target designation tracking section is input, and the viewing direction of the imaging section is automatically controlled based on the input target image tracking signal, and the viewing direction of the imaging section is detected. a visual field azimuth control detection unit that performs the visual field azimuth control, and an image processing unit that receives the captured image signal in which the target image outputted by the target designation tracking unit is designated and detects the respective azimuth angles of the horizon and the target based on the visual field azimuth. , a horizon elevation angle calculation unit that calculates an elevation angle of the horizon by inputting a viewing azimuth angle signal outputted by the viewing azimuth control unit and a horizon azimuth signal based on the viewing azimuth outputted from the image processing unit; a target elevation/elevation angle calculation unit that calculates the elevation angle of the target by inputting the visual azimuth angle signal output by the visual azimuth control unit and the target azimuth signal based on the visual azimuth output from the image processing unit; a target distance calculation unit that calculates a distance to the target by receiving the horizon elevation angle signal outputted by the angle calculation unit and the target elevation angle signal outputted from the target elevation angle calculation unit; and a target image outputted by the target designation tracking unit. A distance measuring device comprising an image display section that receives as input a captured image signal in which a target is specified and a target distance signal output from the target distance calculation section and displays a captured image in which a target is specified and a target distance.