Image range finder

Abstract

The invention discloses an image range finder. The image range finder comprises a displacement meter body, a convex lens, an imaging plate, a stepping motor, a control circuit and a display screen. The convex lens, the imaging plate, the stepping motor, the control circuit and the display screen are orderly arranged in the displacement meter body. The control circuit is connected to the imaging plate by a chain. The control circuit acquires a voltage signal produced by the imaging plate and controls advance or retreat of the imaging plate. The control circuit is connected to the stepping motor and is used for controlling stepping motor operation. The display screen is connected to the control circuit and is used for displaying a distance between an object and the displacement meter, wherein the distance is calculated by the control circuit. The image range finder utilizes the convex lens and image identification to measure the distance of the detected object and has the advantages of good reproducibility, wide application range and no use of a reference substance.

Description

technical field [0001] The invention belongs to the field of measurement, and in particular relates to an image distance measuring instrument. Background technique [0002] There are many kinds of range finders on the market now, but the following deficiencies generally exist: [0003] Laser range finder is an instrument that uses laser to measure the distance of the target. When the laser range finder is working, it emits a very thin laser beam to the target, and the photoelectric element receives the laser beam reflected by the target. The timer measures the time from the launch to the reception of the laser beam, and calculates the distance from the observer to the target. However, the laser is emitted in pulses, and the absolute accuracy is generally low, so it is difficult to accurately measure close-range objects. [0004] The measurement effect of the ultrasonic range finder is greatly affected by the environment, and its stability and directionality are worse than ...

AI Technical Summary

Problems solved by technology

However, the laser is emitted in pulses, and the absolute accuracy is generally low, so it is difficult to accurately measure close-range objects

[0004] The measurement effect of the ultrasonic rangefinder is greatly affected by the environment, and its stability and directionality are worse than that of the laser rangefinder, and it cannot measure the distance of objects in a long distance

[0005] The eye jumping method commonly used in the military for distance measurement usually requires a reference object. In actual measurement, the measurement accuracy is usually affected by the accuracy of the reference object. If the size of the selected reference object is uncertain, the distance of the measured object cannot be obtained.

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