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1. 发明申请

WO2008119425A1 METHOD AND APPARATUS FOR DETECTING CONTACT OF A PIPETTING NEEDLE WITH A LIQUID IN A VESSEL 审中-公开
标题翻译：用于检测管状针与液体中的液体的接触的方法和装置
公开(公告)号：WO2008119425A1
公开(公告)日：2008-10-09
申请号：PCT/EP2008/001667
申请日：2008-03-03
申请人： F. HOFFMANN-LA ROCHE AG , ROCHE DIAGNOSTICS GMBH , ELSENHAND, Oliver , OPARA, Ulrich , SILJEGOVIC, Vuk
发明人： ELSENHAND, Oliver , OPARA, Ulrich , SILJEGOVIC, Vuk
IPC分类号： G01N35/10 , G01F23/296
CPC分类号： G01N35/1011 , G01F23/296 , G01N2035/1025
摘要： A level sensor apparatus for detecting contact of a pipetting needle with a liquid contained in a vessel. The apparatus comprises a pipetting needle (11) made of a material suitable for transmitting ultrasonic waves, a needle holder for holding the pipetting needle, a electromechanical transducer (15) for generating ultrasonic pulses to be transmitted towards the needle, for receiving echo pulses reflected at the tip (17) of the needle, and for generating an electrical output signal representative of the echo pulses, electronic circuit means (31) for generating a driving signal and for applying this signal to the electromechanical transducer (15), which generates corresponding ultrasonic pulses which are transmitted to the pipetting needle (11) towards the tip (17) thereof, and for monitoring the electrical output signal in order to detect the position of the needle (11) at which the tip (17) of the pipetting needle (11) contacts the free surface (14) of the liquid (12) contained in the vessel (13), and transport means (21, 22) for automatically transporting the needle holder and said needle, for positioning the needle (11) at a pipetting position and for moving the tip (17) of the needle (11) towards the free surface (14) of the liquid (12) contained in the vessel (13).
摘要翻译：一种液位传感器装置，用于检测移液针与容纳在容器中的液体的接触。该装置包括由适合于传输超声波的材料制成的移液针（11），用于保持移液针的针保持器，用于产生要向针传递的超声波脉冲的机电换能器（15），用于接收反射的回波脉冲在针的尖端（17）处，并且用于产生表示回波脉冲的电输出信号，用于产生驱动信号并将该信号施加到机电变换器（15）的电子电路装置（31），其产生相应的超声波脉冲，其朝向其吸头（17）传送到移液针（11），并且用于监测电输出信号，以便检测针头（11）的位置，在该位置处，移液针头（11）接触包含在容器（13）中的液体（12）的自由表面（14），以及用于自动运送针保持器和所述需要的输送装置（21,22）用于将针（11）定位在移液位置并用于将针（11）的尖端（17）朝向容纳在容器（13）中的液体（12）的自由表面（14）移动。

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