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    • 34. 发明授权
    • Ultrasonic flow meter including turbulators
    • 超声波流量计包括湍流器
    • US07380470B2
    • 2008-06-03
    • US11304906
    • 2005-12-14
    • Uwe KonzelmannTobias LangChristoph Gmelin
    • Uwe KonzelmannTobias LangChristoph Gmelin
    • G01F1/66
    • G01F1/662G01F15/00
    • Measuring volume flows or mass flows in the intake system of motor vehicle internal combustion engines plays an important role in reducing harmful emissions. Therefore, an ultrasonic flow meter for measuring a flow velocity of a fluid flowing in an essentially laminar flow in the main flow direction is described. The ultrasonic flow meter has at least two ultrasonic transducers, the ultrasonic transducers being able to emit and/or receive ultrasonic waves at an angle α to the main flow direction which is different from 90°. Furthermore, the ultrasonic flow meter has at least one turbulator situated upstream from at least one ultrasonic transducer in the main flow direction of the fluid, which generates longitudinal eddies in at least one zone adjacent to the at least one ultrasonic transducer, in particular in a protrusion in a wall of a flow pipe and thus improves the flow of the fluid in this zone in the flow pipe. Wedge-shaped turbulators protruding into the flow of the fluid or flow grooves are provided in particular as turbulators. The ultrasonic flow meter is distinguished, in comparison with devices known from the related art, by improved signal-to-noise ratio and thus by higher measurement accuracy.
    • 测量机动车内燃机进气系统中的体积流量或质量流量对减少有害排放物起着重要的作用。 因此,描述了用于测量在主流动方向上基本上层流中流动的流体的流速的超声波流量计。 超声波流量计具有至少两个超声波换能器,超声换能器能够以不同于90°的主流动方向的角度α发射和/或接收超声波。 此外,超声波流量计具有位于流体主流动方向上的至少一个超声换能器上游的至少一个湍流器,其在与至少一个超声波换能器相邻的至少一个区域中产生纵向涡流,特别是在 突出在流管的壁中,从而改善流管中该区域中的流体的流动。 突出到流体或流动槽的流动中的楔形紊流器尤其被提供为湍流器。 与现有技术中已知的装置相比,超声波流量计的特征在于通过改善的信噪比并由此提高测量精度。
    • 35. 发明申请
    • Determination of the transit time difference in an ultrasonic flow sensor with multiple zero crossing detection
    • 确定具有多个过零检测的超声波流量传感器中的通行时间差
    • US20070162239A1
    • 2007-07-12
    • US10587685
    • 2005-01-19
    • Tobias Lang
    • Tobias Lang
    • G01F1/66
    • G01F1/667G01P5/247
    • The invention relates to an ultrasonic flow sensor, particularly for measuring a volume flow or mass flow of a fluid (1), which includes two ultrasonic converters (A,B) that are offset in the direction of flow (2) and each transmit a periodic ultrasonic signal (S1,S2) to the other ultrasonic converter (B,A), and a control and evaluation unit (4) that detects several reception times (ti′,ti″) per ultrasonic signal (S1,S2) when an ultrasonic signal (S1,S2) is received by an ultrasonic converter (B,A), a measured quantity (S) being determined from one of the reception times (ti′,ti″). The accuracy of the measurement can be improved substantially when the control and evaluation unit (4) includes at least two counters (5a,5b), the first counter counting a period (Δt′) from a first switchover/reception time (t1′) of a signal (S2,P) at least until the first reception time (t1″) of the ultrasonic signal (S1), and the second counter determining the time interval (Δt″) between a first instant and a second instant out of several paired instants (ti′,ti″) of the signals (S1,S2,P).
    • 本发明涉及一种超声波流量传感器,特别是用于测量流体(1)的体积流量或质量流量,该流体包括在流动方向(2)上偏移的两个超声波转换器(A,B) 周期性超声波信号(S 1,S 2)到另一个超声波变换器(B,A),以及控制和评估单元(4),其检测几个接收时间(t 1, 当超声波转换器(B,A)接收到超声波信号(S 1,S 2)时,超声波信号(S 1,S 2) 从其中一个接收时间(t i i i,i i,t i i i i)。 当控制和评估单元(4)包括至少两个计数器(5a,5b)时,可以基本上改进测量的精度,第一计数器从第一切换/接收时间(t)计数周期(Deltat') 至少直到超声波信号(S1)的第一接收时间(t 1“)为止的信号(S 2,P)的信号(S 1,S 1) 第二计数器确定在几个配对时刻(t i,i,t i,i i“)中的第一时刻和第二时刻之间的时间间隔(Deltat”) 信号(S 1,S 2,P)。
    • 37. 发明授权
    • Determination of a reception time of an ultrasonic signal by means of pulse shape detection
    • 通过脉冲形状检测确定超声波信号的接收时间
    • US08744785B2
    • 2014-06-03
    • US10591897
    • 2005-04-21
    • Tobias Lang
    • Tobias Lang
    • G01F1/00
    • G01F1/66
    • The present invention relates to an ultrasonic flow sensor equipped with at least one ultrasonic transducer (A, B) for transmitting and receiving ultrasonic signals (A0, B0) and one receiver unit (4) that is connected to the ultrasonic transducer (A, B) and detects a zero crossing (N) of the ultrasonic signal (A0, B0) as a reception time after the ultrasonic signal (A0, B0) has exceeded a predetermined threshold (SW). The measurement precision of the sensor can be significantly improved if the receiver unit (4) determines the time of a value characteristic of the ultrasonic signal (A0, B0) and determines the relative time shift (deltat) of the characteristic value (Ampmax, Ts) in relation to the zero crossing (N0, N1) that is detected as the reception time (t0).
    • 超声波流量传感器技术领域本发明涉及一种超声波流量传感器,其配备有至少一个用于发送和接收超声波信号(A0,B0)的超声波换能器(A,B)和连接到超声波换能器(A,B)的一个接收器单元 ),并且检测超声波信号(A0,B0)的过零点(N)作为超声波信号(A0,B0)超过预定阈值(SW)之后的接收时间。 如果接收器单元(4)确定超声信号(A0,B0)的值特性的时间并且确定特征值的相对时间偏移(Δtpm),则可以显着提高传感器的测量精度(Ampmax,Ts )相对于被检测为接收时间(t0)的过零点(N0,N1)。
    • 38. 发明授权
    • Method for testing the operation of a heating element used for an activated carbon filter
    • 用于活性炭过滤器的加热元件的操作的测试方法
    • US08598496B2
    • 2013-12-03
    • US12573368
    • 2009-10-05
    • Heiko FreterTobias Lang
    • Heiko FreterTobias Lang
    • H05B3/02G01R31/08G01R27/08G01R31/00G01R25/00H03D13/00
    • G01N27/041G01N27/045
    • The invention relates to a method for testing the operation of an electric heating element which is used for heating activated carbon of an activated carbon filter and/or air which is guided through the activated carbon for the regeneration thereof. The heating element has a PTC-characteristic (positive temperature coefficient characteristic). The strength of a current flow through the heating element in a heating phase selected for the operational testing is measured at a point in time or over a time period and is used for the operational testing, in that at least one measured current flow value is compared with a corresponding current flow value to be anticipated during defect-free operation of the heating element, and the heating element is considered to be defective in the event of a deviation which exceeds a predetermined measurement.
    • 本发明涉及一种电加热元件的操作方法,该电加热元件用于加热通过活性炭引导的活性炭过滤器和/或空气的活性炭再生。 加热元件具有PTC特性(正温度系数特性)。 在选择用于操作测试的加热阶段中通过加热元件的电流的强度在一个时间点或一段时间内被测量,并且用于操作测试,因为至少一个测量的电流流量值被比较 具有在加热元件的无缺陷操作期间预期的相应的电流流量值,并且在超过预定测量的偏差的情况下认为加热元件是有缺陷的。
    • 39. 发明授权
    • Fuel vapor storage and recovery apparatus
    • 燃油蒸汽储存和回收装置
    • US08297262B2
    • 2012-10-30
    • US12964107
    • 2010-12-09
    • Tobias LangPiers CattonUlrich KarschTho Truong Huynh
    • Tobias LangPiers CattonUlrich KarschTho Truong Huynh
    • F02M33/02
    • F02M25/0854B01D53/0407B01D2259/4516B60K15/03504B60K2015/03514H03C3/0925H03C3/0958H04B1/0483H04L27/361
    • A fuel vapor storage and recovery apparatus includes a fuel vapor storage canister, said fuel vapor storage canister comprising at least first and second vapor storage compartments filled with an absorbent material, for instance filled with activated carbon, at least a vapor inlet port, an atmospheric vent port and a purge port. Said fuel vapor storage canister defines an air flow path between said vapor inlet port and said atmospheric vent port during shut-off of the internal combustion engine of the vehicle. During purging cycles there is defined an air flow path between said atmospheric vent port and said purge port wherein said first and second vapor storage compartments are arranged in concentric relationship and wherein said first and second vapor storage compartments in flow direction are separated from each other by an air gap diffusion barrier.
    • 燃料蒸气存储和回收装置包括燃料蒸气存储罐,所述燃料蒸气存储罐包括至少第一和第二蒸气存储室,其填充有吸收材料,例如填充有活性炭,至少蒸气入口,大气 排气口和净化口。 所述燃料蒸汽储存罐在车辆的内燃机关闭期间限定了在所述蒸汽入口和所述大气排放口之间的空气流动路径。 在净化循环期间,限定了所述大气排放口和所述吹扫口之间的空气流动路径,其中所述第一和第二蒸气存储室以同心的关系布置,并且其中流动方向上的所述第一和第二蒸气存储隔间彼此分开, 气隙扩散屏障。
    • 40. 发明申请
    • Method for Testing the Operation of a Heating Element Used for an Activated Carbon Filter
    • 用于活性炭过滤器的加热元件的操作测试方法
    • US20110080159A1
    • 2011-04-07
    • US12573368
    • 2009-10-05
    • Heiko FreterTobias Lang
    • Heiko FreterTobias Lang
    • G01R25/00
    • G01N27/041G01N27/045
    • The invention relates to a method for testing the operation of an electric heating element which is used for heating activated carbon of an activated carbon filter and/or air which is guided through the activated carbon for the regeneration thereof. The heating element has a PTC-characteristic (positive temperature coefficient characteristic). The strength of a current flow through the heating element in a heating phase selected for the operational testing is measured at a point in time or over a time period and is used for the operational testing, in that at least one measured current flow value is compared with a corresponding current flow value to be anticipated during defect-free operation of the heating element, and the heating element is considered to be defective in the event of a deviation which exceeds a predetermined measurement.A further method in accordance with the invention corresponds to the first-named method, but with the difference that an electric resistor which is not the heating element has a PTC-characteristic. The PTC-resistor is electrically connected to the heating element such that the current flowing through the heating element also flows through the PTC-resistor. The PTC-resistor is disposed in spatial terms adjacent to the heating element in such a manner that the heating element also heats the PTC-resistor.A further method in accordance with the invention corresponds to the second-named method, but with the difference that in any event the heating element serves to heat an air flow provided for the regeneration of the activated carbon and the PTC-resistor is disposed in a spatial relationship with respect to the heating element such that the PTC-resistor is heated by virtue of the fact that the regeneration air flow heats the PTC-resistor.
    • 本发明涉及一种电加热元件的操作方法,该电加热元件用于加热通过活性炭引导的活性炭过滤器和/或空气的活性炭再生。 加热元件具有PTC特性(正温度系数特性)。 在选择用于操作测试的加热阶段中通过加热元件的电流的强度在一个时间点或一段时间内被测量,并且用于操作测试,因为至少一个测量的电流流量值被比较 具有在加热元件的无缺陷操作期间预期的相应的电流流量值,并且在超过预定测量的偏差的情况下认为加热元件是有缺陷的。 根据本发明的另一种方法对应于第一种方法,但不同之处在于不是加热元件的电阻器具有PTC特性。 PTC电阻器电连接到加热元件,使得流过加热元件的电流也流过PTC电阻器。 PTC电阻器以与加热元件相邻的空间方式设置,使得加热元件也加热PTC电阻器。 根据本发明的另一种方法对应于第二种方法,但是不同之处在于,无论如何,加热元件用于加热为活性炭的再生提供的空气流,并且PTC电阻器设置在 相对于加热元件的空间关系,使得PTC电阻器由于再生空气流加热PTC电阻器而被加热。