JPH0346814U

JPH0346814U -

Info

Publication number: JPH0346814U
Application number: JP10780189U
Authority: JP
Priority date: 1989-09-14
Filing date: 1989-09-14
Publication date: 1991-04-30

Description

[Brief explanation of drawings]

第１図は、この考案に係る距離測定装置の一実
施例の全体構成を示すブロツク図、第２図は、第
１図に示す実施例の投受光系の原理を説明するた
めの原理図、第３図は、第１図に示す実施例の複
数個の投光素子の駆動電流の各波形を示すタイミ
ングチヤート、第４図は、従来の広視野測距カメ
ラの投受光系の原理を説明するための原理図、第
５図は、第４図に示す投受光系の投光素子の駆動
電流のタイミングチヤートである。１１〜１３…発振器、１４〜１６…投光素子、
２０〜２５…同期検波器、２６〜２８…測距対象
、２９…投光レンズ、３０…受光レンズ、３１…
受光素子、３３〜３９…バンドパスフイルタ、４
０〜４５…オートゲインコントロールアンプ、４
６〜４８…引算回路。 FIG. 1 is a block diagram showing the overall configuration of an embodiment of the distance measuring device according to this invention, and FIG. 2 is a principle diagram for explaining the principle of the light emitting and receiving system of the embodiment shown in FIG. 1. FIG. 3 is a timing chart showing each waveform of the driving current of the plurality of light projecting elements in the embodiment shown in FIG. FIG. 5 is a timing chart of the driving current of the light emitting element of the light emitting/receiving system shown in FIG. 4. 11-13... Oscillator, 14-16... Light projecting element,
20-25... Synchronous detector, 26-28... Distance measuring object, 29... Light projecting lens, 30... Light receiving lens, 31...
Light receiving element, 33 to 39...Band pass filter, 4
0~45...Auto gain control amplifier, 4
6-48...Subtraction circuit.

Claims

[Scope of utility model registration request]

A plurality of light emitting elements are each driven by a drive current of a different frequency and simultaneously emit light to a plurality of distance measurement targets, and the projection light emitted by these plurality of light emitting elements is condensed to form a plurality of distance measuring objects. a light projection lens that projects the light onto each of the point distance measurement targets, and a plurality of light receiving elements that respectively receive the reflected light from the plurality of distance measurement targets and output a detection signal according to each light receiving position;
A light-receiving lens is arranged at a distance from the light-emitting lens by a certain base line length, and collects each of the reflected lights to be received by the plurality of light-receiving elements. A plurality of filters each pass signals in the drive frequency bands of the light projecting elements included therein, and each signal passing through each of these filters is detected at each of the drive frequencies to correspond to the light emitting component of each of the light projecting elements. A distance measuring device comprising: a plurality of detectors for extracting only the detected signals; and a plurality of calculation means for obtaining distance measurement information for each of the reflected lights based on the outputs of the plurality of detectors.