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    • 1. 发明授权
    • Device for eliminating ringing in filtered ECG signals
    • 用于消除滤波后的ECG信号振铃的装置
    • US5532951A
    • 1996-07-02
    • US266233
    • 1994-06-27
    • Thomas OhlssonPeter Karlsson
    • Thomas OhlssonPeter Karlsson
    • A61B5/0452A61B5/0428G06F17/10A61B5/0402
    • A61B5/0428
    • A device for eliminating ringing in filtered ECG signals includes an analog-to-digital for converting the ECG input signals into a series of digital values, and a filter unit connected to the output of the analog-to digital converter. The filter unit includes a recursive IIR-filter and a subsequent allpass filter with a phase shift which is equal to twice the phase shift of the IIR filter. The allpass filtering is performed time-reversed with respect to the IIR filtering. In a method for producing an allpass filter, for use in the above device, having a phase shift which is equal to twice the phase shift of an IIR filter, the IIR filter having zero points situated on the unity circle in the Z-plane, the zero points of the IIR filter are replaced by new zero points obtained by reflecting the poles of the filter in the unity circle in the Z-plane.
    • 用于消除经滤波的ECG信号中的振铃的装置包括用于将ECG输入信号转换成一系列数字值的模拟数字信号,以及连接到模数转换器的输出的滤波器单元。 滤波器单元包括递归IIR滤波器和具有等于IIR滤波器的相移的两倍的相移的后续全通滤波器。 全通滤波相对于IIR滤波进行时间反转。 在用于制造全通滤波器的方法中,为了在上述装置中使用具有等于IIR滤波器的相移的两倍的相移的IIR滤波器,具有位于Z平面中的单位圆上的零点, IIR滤波器的零点由通过将滤波器的极点反映在Z平面中的单位圆中获得的新的零点代替。
    • 3. 发明授权
    • Device for filtering ECG signals
    • ECG信号滤波器
    • US5772603A
    • 1998-06-30
    • US867959
    • 1997-06-03
    • Thomas OhlssonPeter Karlsson
    • Thomas OhlssonPeter Karlsson
    • A61B5/0452A61B5/0428H03H17/00H03H17/02H03H17/08H03H21/00
    • A61B5/0428
    • A device for filtering ECG signals has an A/D converter and a filter unit connected to the converter's output. The filter unit includes a filter, or a combination of filters with a non-linear phase response such that signals with frequencies in the passband of the filter, or the combination of filters, are delayed more than signals with frequencies in the transition band between the passband and the suppressed frequency band of the filter, or the combination of filters. A method for producing an FIR filter, with a phase response opposite to the phase response of a filter for filtering out DC components, or an IIR filter, suitable for use in the above-described device, is also disclosed in which the impulse response from the filter for filtering out DC components and low-frequency components or the IIR filter is reversed in time and sampled. The sampled values are then used for determining coefficients for the FIR filter.
    • 用于过滤ECG信号的装置具有连接到转换器输出的A / D转换器和滤波器单元。 滤波器单元包括滤波器或具有非线性相位响应的滤波器的组合,使得具有滤波器的通带中的频率的信号或滤波器的组合被延迟多于具有在 滤波器的通带和抑制频带,或滤波器的组合。 还公开了一种用于产生具有与用于滤除DC分量的滤波器的相位响应相反的相位响应的FIR滤波器的方法或适用于上述装置的IIR滤波器,其中来自 用于滤除直流分量和低频分量的滤波器或IIR滤波器在时间上反转并采样。 采样值然后用于确定FIR滤波器的系数。
    • 4. 发明授权
    • Method and device for filtering out baseline fluctuations from an
electrocardiogram
    • 从心电图滤除基线波动的方法和装置
    • US5469856A
    • 1995-11-28
    • US117069
    • 1993-12-22
    • Lena LundstromPeter KarlssonThomas Ohlsson
    • Lena LundstromPeter KarlssonThomas Ohlsson
    • A61B5/0428A61B5/04
    • A61B5/04017A61B5/04004
    • Method and device for filtering out baseline fluctuations from an electrocardiogram. It is known to provide a high pass filter for filtering out baseline fluctuations from an electrocardiogram, the lower cut off frequency of a high pass filter is at a value below the frequencies which are characteristic of the heart signals at the lowest possible heart rate. In order to increase the effectiveness of the baseline filtering, it is provided that in a device (4) the current heartbeat rate is determined from the electrocardiogram and, in dependence thereupon, the lower cut off frequency of the filter (2) is altered in such a manner that the lower cut off frequency is increased in the case of an increasing heartbeat rate and is decreased in the case of a decreasing heartbeat rate.
    • PCT No.PCT / EP92 / 00473 Sec。 371日期:1993年12月22日 102(e)日期1993年12月22日PCT提交1992年3月4日PCT公布。 出版物WO92 / 15242 日期:1992年9月17日。从心电图滤除基线波动的方法和装置。 已知提供用于滤除来自心电图的基线波动的高通滤波器,高通滤波器的较低截止频率处于低于以最低可能心率的心脏信号特征的频率的值。 为了提高基线滤波的有效性,规定在器件(4)中,根据心电图确定当前的心跳速率,并且依赖于滤波器(2)的较低截止频率被改变 在心跳速度增加的情况下,下切断频率增加,并且在心率降低的情况下减小。
    • 6. 发明授权
    • Arrangement for charging energy in an energy-storing arrangement such as an ignition capacitor
    • 在诸如点火电容器的能量存储装置中对能量进行充电的装置
    • US06595137B1
    • 2003-07-22
    • US09889905
    • 2001-10-09
    • Peter Karlsson
    • Peter Karlsson
    • F23Q702
    • F42C15/40
    • The present invention provides an arrangement for charging energy in an energy-storing arrangement such as an ignition capacitor in electronic ignition systems. To reduce the risk of malfunction, direct-current-controlled breakers controlled by environmental conditions, normally occurring on the primary side of a transformer (4) in series with the primary winding (5) have been replaced by a frequency divider (2) controlled by environmental conditions. This frequency divider divides down a signal supplied by a signal generator (1) pulse train with a lower frequency which controls a breaker (7) connected in series with the primary winding (5) of the transformer.
    • 本发明提供了一种在电子点火系统中的诸如点火电容器之类的能量存储装置中对能量进行充电的装置。 为了降低故障风险,通常发生在与初级绕组(5)串联的变压器(4)的初级侧的环境条件控制的直流控制断路器已被控制的分频器(2)代替 根据环境条件。 该分频器分频由具有较低频率的信号发生器(1)脉冲串提供的信号,该频率控制与变压器的初级绕组(5)串联连接的断路器(7)。
    • 8. 发明授权
    • Position adjusted guard time interval for OFDM-communications system
    • OFDM通信系统的位置调整保护时间间隔
    • US08537759B2
    • 2013-09-17
    • US10549846
    • 2004-03-17
    • Rickard LjungPeter Karlsson
    • Rickard LjungPeter Karlsson
    • H04W4/00
    • H04L27/2605H04L25/0212H04L25/0224H04L27/2607H04L27/2646
    • A device and a method within a communication system where at least some part of the transmission is executed by means of radio waves, and where symbols are transmitted by means of Orthogonal Frequency Divisional Multiplexing, so called OFDM-technology, between a transmitting unit and a receiving unit, at which the symbol transmission is executed over a transmission channel in blocks of binary digits with a guard interval GI between said blocks, where transmitting unit is equipped with means to control the length of the guard internal (GI) with regard to the physical condition for/of the transmission channel, so that the guard interval can be reduced without the disturbance susceptibility being increased, but instead increasing the capacity/throughput of the transmission channel by the time that is set free/made available being used to transmit information. One embodiment of the invention includes a guard interval adjustment unit connected to other OFDM-equipment in transmitting and/or receiving unit.
    • 在通信系统中的装置和方法,其中通过无线电波执行传输的至少一部分,并且其中通过所谓的OFDM技术的正交频分复用(OFDM)技术在发射单元和 接收单元,其中通过传输信道在具有所述块之间的保护间隔GI的二进制数字块中通过传输信道执行符号传输,其中传输单元配备有用于控制关于卫星内部(GI)的长度的装置 传输信道的物理条件,使得可以在没有增加干扰敏感性的情况下减小保护间隔,而是在被设置为可用/可用的时间用于传送信息的同时增加传输信道的容量/吞吐量 。 本发明的一个实施例包括与发送和/或接收单元中的其他OFDM设备连接的保护间隔调整单元。
    • 10. 发明授权
    • Steering linkage
    • 转向联动
    • US08272470B2
    • 2012-09-25
    • US12919093
    • 2009-02-16
    • Peter Karlsson
    • Peter Karlsson
    • B62D5/12B62D7/14B62D7/16
    • B62D7/144B62D5/12
    • A steering linkage for a vehicle, having a first draglink (32), an auxiliary steering cylinder (34) and a second draglink (38). The auxiliary steering cylinder (34) has a through piston rod (36). The first draglink (32) is arranged between a guide arm (12) of a steering gear (10) and a first end (35) of the through piston rod (36). The second draglink (38) is arranged between steerable vehicle wheels (48, 50) and the second end (37) of the through piston rod (36), thereby making it possible for the steerable vehicle wheels (48, 50) to be steered via the steering gear (10).
    • 一种用于车辆的转向连杆机构,具有第一牵引链(32),辅助转向缸(34)和第二牵引链(38)。 辅助转向缸(34)具有通过活塞杆(36)。 第一拖链(32)布置在舵机(10)的引导臂(12)和通过活塞杆(36)的第一端(35)之间。 第二拖链38布置在可转向车轮(48,50)和通过活塞杆(36)的第二端(37)之间,从而使可转向车轮(48,50)能够转向 经由舵机(10)。