KR970048606A - Optical distance measuring device and method - Google Patents

Abstract

The present invention relates to an optical distance measuring apparatus and method, and generally maintains a constant voltage without changing a reference voltage according to time, and thus detects even a signal measured and input by the environment, resulting in a distance measurement. Since the distance measuring method also outputs one distance value by averaging five distance values, there is a problem of loss in time, and the present invention changes the reference voltage with time to hinder the environment to solve such a problem. The distance measurement can be improved, and the speed can be improved by using the average of the previous four distance values and the current distance measurement value as the distance value for each distance measurement.

Description

Optical distance measuring device and method

As this is a public information case, the full text was not included.

1 is a block diagram of an optical distance measuring device of the present invention.

2 is a configuration diagram of a reception signal processing unit of the present invention.

Claims (3)

An optical distance measuring device comprising: a high pressure generator (10) for transforming and applying a DC voltage; A laser driver 20 for outputting a laser drive signal when the voltage of the high voltage generator 10 is applied; A laser light emitting unit 30 which transmits a laser beam to the target object 40 according to the driving signal of the laser driver 20; A laser receiver (50) for receiving a laser beam incident on and reflected on the object (40); A reception signal processor 60 for processing a signal using the received signal of the laser receiver 50; A comparator (70) for comparing the processed signal of the received signal processor (60) with a reference voltage; A distance calculation central processing unit (80) for calculating a distance after signal processing of the received signal processing unit (60); Optical distance measuring device, characterized in that configured as an output unit (90) for outputting the distance value of the distance calculation central processing unit (80). 2. The apparatus of claim 1, wherein the received signal processor (60) comprises: an amplifier (61) for amplifying the received signal input from the laser receiver (50); A signal level adjusting unit 62 for adjusting the amplified signal of the amplifier 61 to a reference voltage signal level; And a signal level switching unit (63) for triggering an adjustment signal of the signal level adjusting unit (62) to switch to a level. A distance calculation method comprising: a first step (S1) of measuring a time at which laser light emission is started; A second step (S2) of measuring a time received after being reflected by the object after light emission in the first step (S1); A third step (S3) of obtaining a distance by subtracting the time measured in the second step (S2) from the time measured in the first step (S1); A fourth step S4 of determining whether or not the distance value obtained in the third step S3 is five or not, and performing the first step S1 again until five are obtained; A fifth step (S5) of obtaining and outputting an average value of five distance values if the number is five after determining the fourth step (S4); A seventh step (S7) of obtaining a time until the start of laser light emission and a reception time again after the fifth step (S5); After the first five measurements after performing the seventh step (S7) and outputs one distance value every time the measured value is thereafter outputs one distance value by taking the average of the previous four distance values and again Optical distance measuring method characterized in that the eighth step (S8) performing the sixth step (S6) in sequence. ※ Note: The disclosure is based on the initial application.