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    • 92. 发明公开
    • ELECTRO-OPTICAL DISTANCE METER
    • 电光距离仪表
    • EP3064962A1
    • 2016-09-07
    • EP16157707.7
    • 2016-02-26
    • Kabushiki Kaisha Topcon
    • OHTOMO, FumioKUMAGAI, Kaoru
    • G01S17/36G01S7/491G01S17/10G01S7/497
    • G01S7/4865G01S7/4915G01S7/497G01S17/102G01S17/36
    • The invention provides an electro-optical distance meter comprising a light emitting element for emitting a distance measuring light, signal generators for generating two or more proximity frequencies, a modulation signal in which the two or more proximity frequencies are intermitted respectively and converted to pulses with a predetermined width, a projecting optical system for sequentially switching over and projecting intermittent modulated distance measuring light as converted to pulses with predetermined width by the modulation signal, a photodetection unit for receiving a reflected distance measuring light from an object to be measured and producing an intermittent photodetection signal with a predetermined pulse width, a reference signal generator for issuing reference frequency signals having a difference of a predetermined frequency respectively, a frequency converting unit for performing frequency conversion by mixing the intermittent photodetection signals from the photodetection unit and the reference frequency signals, corresponding to each intermittent frequency signals respectively and obtaining intermittent conversion signals with a pulse width, and an arithmetic control unit, wherein the pulse width of the intermittent photodetection signal is set up so as to be longer in a time duration than a period of the intermittent conversion signal, and in a case where the object to be measured is a moving object, the period of the intermittent photodetection signal is set to such speed that a phase change of the intermittent conversion signal due to moving of the moving object can be negligible, wherein the arithmetic control unit is configured so as to calculate a precise measurement distance value by obtaining the phase of the intermittent photodetection signal with respect to the two or more proximity frequencies, to calculate a coarse measurement distance value by obtaining a phase difference between the intermittent conversion signals, and to determine a distance by combining the coarse measurement distance value and the precise measurement distance value.
    • 本发明提供了一种电光测距仪,包括用于发射测距光的发光元件,用于产生两个或更多个接近频率的信号发生器,两个或更多个接近频率分别被中断并且被转换为脉冲的调制信号, 一个预定的宽度,一个投影光学系统,用于顺序切换并投射间歇调制的测距光,该间隔调制的测距光通过调制信号转换为具有预定宽度的脉冲;光检测单元,用于接收来自待测物体的反射距离测量光并产生 具有预定脉冲宽度的间歇式光电检测信号,用于分别发出具有预定频率差的基准频率信号的参考信号发生器,用于通过混合来自光电探测器的间歇式光电检测信号来执行频率转换的频率转换单元 以及分别对应于各个间歇频率信号并获得具有脉冲宽度的间歇转换信号的基准频率信号和基准频率信号,以及运算控制单元,其中间歇光检测信号的脉冲宽度被设置为在a 时间比间歇转换信号的周期短,并且在测量对象是运动对象的情况下,间歇光检测信号的周期被设置为这样的速度,即由于移动引起的间歇转换信号的相位变化 其中运算控制单元被配置为通过获得关于两个或更多个接近频率的间歇光检测信号的相位来计算精确测量距离值,以计算粗测量距离值 通过获得间歇转换信号之间的相位差来确定 结合粗测量距离值和精确测量距离值的距离。
    • 95. 发明公开
    • TILT DETECTING DEVICE
    • NEIGUNGSDETEKTIONSVORRICHTUNG
    • EP3032219A1
    • 2016-06-15
    • EP15195559.8
    • 2015-11-20
    • Kabushiki Kaisha TOPCON
    • KODAIRA, Jun-ichi
    • G01C9/06G01C9/08G01C9/20
    • G01C9/06G01C9/08G01C9/18G01C9/20G01C2009/066
    • A tilt detecting device comprising, a light source for projecting a pattern, a liquid component having a free liquid surface and for rear-surface reflecting by the free liquid surface, a photodetection element for photodetecting a reflection image of the rear-surface reflected pattern, and an arithmetic processing unit, wherein the arithmetic processing unit is adapted to scan a predetermined range of a photodetection surface of the photodetection element as many times as required and performs averaging processing to a photodetection signal as detected and calculates a barycentric position of the pattern based on signals subjected to averaging processing.
    • 一种倾斜检测装置,包括:用于投影图案的光源,具有自由液面的液体成分和由所述自由液面进行后表面反射的光检测元件,用于对所述背面反射图案的反射图像进行光电检测; 以及算术处理单元,其中所述运算处理单元适于根据需要扫描所述光电检测元件的光检测表面的预定范围多次,并对所检测的光电检测信号进行平均处理,并且基于所述图案的重心位置计算 对信号进行平均处理。