an image rangefinder

Abstract

The invention discloses an image distance measuring instrument, which comprises a displacement meter body, a convex lens, an imaging board, a stepping motor, a control circuit and a display screen, and is sequentially arranged in the displacement meter body; the control circuit and the imaging board are connected through a chain , the control circuit obtains the voltage signal generated by the imaging board and controls the imaging board to move forward or backward; the control circuit is connected with the stepping motor to control the operation of the stepping motor; the display screen is connected with the control circuit; The distance between the target object and the displacement meter; the imaging board is a circuit board with 1000*1000 pixels; each pixel is composed of a photodiode, a precision fixed value resistor and a voltmeter connected in parallel. The invention adopts the method of convex lens and image recognition to measure the distance of the measured object, and has the advantages of good reproducibility, wide application area and no reference object.

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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