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1. 发明授权

US4410926A Arrangement for generating DC magnetic fields of alternating polarity for the magnetic-inductive flow measurement 失效
标题翻译：用于产生用于磁感应流量测量的交替极性的直流磁场的布置
公开(公告)号：US4410926A
公开(公告)日：1983-10-18
申请号：US406061
申请日：1982-08-06
申请人： Peter Hafner , Peter Flecken
发明人： Peter Hafner , Peter Flecken
IPC分类号： G01R33/12 , G01F1/60 , H01F7/20 , H03K17/0416 , H03K17/64 , H03K17/66 , H02H3/00 , H02H7/122
CPC分类号： H03K17/662 , G01F1/60 , H03K17/04166 , H03K17/64
摘要： An arrangement for generating DC magnetic fields of alternating polarity for the magnetic-inductive flow measurement by means of a field coil which is connected via alternately controlled switching members to a DC voltage source, wherein during the reversal time following the change-over of the switching members a capacitor is connected to the field coil to form a resonant circuit separate from the DC voltage source and the capacitance C of the capacitor in dependence upon the desired reversal time .DELTA.t has substantially the value ##EQU1## wherein L is the inductance and R the ohmic resistance of the field coil.
摘要翻译：一种用于通过经由交替控制的开关构件连接到直流电压源的励磁线圈产生用于磁感应流量测量的交流极性的直流磁场的装置，其中在切换切换之后的反转时间期间元件电容器连接到励磁线圈以形成与DC电压源分开的谐振电路，并且根据期望的反转时间DELTA t具有实质上的值，其中L是电感和R 励磁线圈的欧姆电阻。

2. 发明授权

US5955681A Galvanic electrode of an electromagnetic flow meter 失效
标题翻译：电磁流量计的电镀电极
公开(公告)号：US5955681A
公开(公告)日：1999-09-21
申请号：US48657
申请日：1998-03-26
申请人： Peter Hafner , Robert Schafer , Roland Unterseh
发明人： Peter Hafner , Robert Schafer , Roland Unterseh
IPC分类号： G01F1/60
CPC分类号： G01F1/584
摘要： This galvanic electrode of a flow sensor of an electromagnetic flowmeter for measuring the volumetric flow rate of an electrically conductive liquid flowing in a measuring tube is practically absolutely fluid-tight inserted in the wall of the measuring tube and has a highly constant wetting surface. The electrode comprises a shank having a first portion which is fitted fluid-tightly in a hole in the wall, an end face and a second portion having a smaller diameter than the hole and the first portion. A wetting surface formed by the end face and a second portion of the electrode shank. This second portion forms a gap between the surface of the hole. The gap is sufficiently wide and the surface of the hole has a low surface tension so that the liquid will penetrate into and fill the gap, and the wetting surface will remain constant under all operating conditions of the flowmeter.
摘要翻译：用于测量在测量管中流动的导电液体的体积流量的电磁流量计的流量传感器的该电流电极实际上绝对是流体密封地插入到测量管的壁中并且具有高度恒定的润湿表面。所述电极包括具有第一部分的柄，所述第一部分流体密封地装配在所述壁中的孔中，端面和具有比所述孔和所述第一部分小的直径的第二部分。由端面和电极柄的第二部分形成的润湿表面。该第二部分在孔的表面之间形成间隙。间隙足够宽，孔的表面具有低的表面张力，使得液体将渗入并填充间隙，并且润湿表面将在流量计的所有操作条件下保持恒定。

3. 发明授权

US4422337A Method of compensating the interference DC voltages in the electrode circuit in magnetic-conductive flow measurement 失效
标题翻译：在导磁流量测量中补偿电极电路中的干扰直流电压的方法
公开(公告)号：US4422337A
公开(公告)日：1983-12-27
申请号：US304169
申请日：1981-09-21
申请人： Peter Hafner
发明人： Peter Hafner
IPC分类号： G01F1/60
CPC分类号： G01F1/60
摘要： An arrangement for magnetic-inductive flow measurement of an electrically conductive liquid flowing in a conduit includes a magnetic field generator which generates a periodically reversed magnetic field passing through the conduit perpendicularly to the flow direction. In the conduit two electrodes are disposed. The voltage taken from the electrodes is applied to a measuring amplifier. Connected to the output of the measuring amplifier are two sample and hold circuits which are controlled by a control circuit in such a manner that they sample the output voltage of the measuring amplifier for equal induction values of opposite sign of the magnetic field and store the sampling values until the next sampling. A subtraction circuit forms the difference of the stored sampling values. In a control loop between the output and the input of the measuring amplifier there is a storing control circuit which in predetermined compensation time intervals forms a compensation voltage value regulating the output voltage of the measuring amplifier to zero. The compensation method resides in that each compensation time interval lies within the time interval, corresponding to the switched-on magnetic field, in which also the preceding sampling time interval lies.
摘要翻译：用于在导管中流动的导电液体的磁感应流量测量的布置包括磁场发生器，其产生垂直于流动方向穿过导管的周期性反转的磁场。在管道中设置两个电极。从电极取得的电压被施加到测量放大器。连接到测量放大器的输出的是两个采样和保持电路，它们由控制电路控制，使得它们以与磁场相反的相等的感应值相等的方式对测量放大器的输出电压进行采样，并存储采样值直到下一次抽样。减法电路形成存储的采样值的差异。在测量放大器的输出和输入之间的控制回路中存在一个存储控制电路，其在预定的补偿时间间隔内形成将测量放大器的输出电压调节到零的补偿电压值。补偿方法在于，每个补偿时间间隔在对应于接通磁场的时间间隔内，其中也是先前的采样时间间隔。

4. 发明授权

US5210496A Method and circuit arrangement for intermittent application of a voltage to an electrode 失效
标题翻译：间歇地向电极施加电压的方法和电路装置
公开(公告)号：US5210496A
公开(公告)日：1993-05-11
申请号：US594316
申请日：1990-10-09
申请人： Peter Hafner
发明人： Peter Hafner
IPC分类号： G01F1/60
CPC分类号： G01F1/60
摘要： A method and a circuit arrangement for intermittent application of an electrical DC or AC voltage by a switch to an electrode in contact with a material, in particular for cleaning the electrode. The method is suitable in particular for use in electromagnetic flow measuring technology. The objective is to protect the electrode from parasitic capacitances present in the switch and interference voltages occurring therein. This is achieved in that at least in the period in which no voltage is applied to the electrode, the electrical potential of the electrode is coupled to the terminal of the switch which is not allocated to the electrode. Impedance converters are suitable as coupling elements.
摘要翻译：一种用于通过开关将电DC或AC电压间歇地施加到与材料接触的电极，特别是用于清洁电极的方法和电路装置。该方法特别适用于电磁流量测量技术。目的是保护电极免受开关中存在的寄生电容和其中发生的干扰电压。这是通过至少在没有电压施加到电极的时段中实现的，电极的电位耦合到未分配给电极的开关的端子。阻抗转换器适合作为耦合元件。

5. 发明授权

US4932268A Electromagnetic flow measuring arrangement 失效
标题翻译：电磁流量测量装置
公开(公告)号：US4932268A
公开(公告)日：1990-06-12
申请号：US251689
申请日：1988-09-29
申请人： Peter Hafner
发明人： Peter Hafner
IPC分类号： G01F1/58 , G01F15/02
CPC分类号： G01F1/58 , G01F1/586 , G01F15/02
摘要： In an electromagnetic flow measuring arrangement an electrically conductive fluid flows through a measuring tube in which a magnetic field is generated transversely of the flow direction, whereby a voltage is induced which is proportional to the flow velocity. This voltage is tapped by means of two electrodes. The cavity of the measuring tube has an elliptical cross-section with two major axes, the first major axis coinciding with the connecting line of the two electrodes, and the second major axis coinciding with the direction of the magnetic field. The flow to be measured is proportional to the product of the measured flow velocity and the cross-section area of the cavity of the measuring tube. The flow measuring arrangement is constructed so that on changes of the cavity cross-section caused by external influences the cross-section retains substantially the profile of an ellipse and the length of the second major axis remains substantially constant. In this way external influences, such as pressure and temperature, that change the cross-section of the cavity of the measuring tube, do not affect the measuring result.
摘要翻译：在电磁流量测量装置中，导电流体流过其中横向于流动方向产生磁场的测量管，由此产生与流速成比例的电压。该电压通过两个电极进行抽头。测量管的空腔具有两个长轴的椭圆形截面，第一长轴与两个电极的连接线重合，第二个长轴与磁场的方向一致。要测量的流量与测量流速和测量管腔的横截面面积的乘积成比例。流量测量装置被构造成使得在由外部影响导致的空腔横截面的变化上，横截面基本上保持椭圆的轮廓并且第二长轴的长度保持基本恒定。以这种方式，改变测量管的腔体横截面的诸如压力和温度的外部影响不影响测量结果。

6. 发明授权

US4382387A Method of compensating the interference DC voltages in the electrode circuit in magnetic-conductive flow measurement 失效
标题翻译：在导磁流量测量中补偿电极电路中的干扰直流电压的方法
公开(公告)号：US4382387A
公开(公告)日：1983-05-10
申请号：US254634
申请日：1981-04-16
申请人： Peter Hafner
发明人： Peter Hafner
IPC分类号： G01F1/60
CPC分类号： G01F1/60
摘要： A method of compensating interference DC voltages in the electrode circuit in magnetic-conductive flow measurement with periodically reversed DC magnetic field in which the useful signal is obtained by sampling and storing the signal voltage after each reversal of the magnetic field at opposite polarity values of the magnetic field during a sampling time interval and forming the difference of the stored sampled values, and wherein in a compensating time interval following each sampling time interval a compensation voltage is produced by sampling and storing the signal voltage, which compensation voltage is superimposed oppositely on the signal voltage for compensating the signal voltage within the compensation time interval to the value zero and is retained until the next compensation time interval, wherein each compensation time interval lies within the time interval corresponding to the switched-on magnetic field, in which also the preceding sampling time interval lies.
摘要翻译：一种通过周期性反转的直流磁场对导电流量测量中的电极电路中的干扰直流电压进行补偿的方法，其中有用信号通过在每次反转磁场的相反极性值之后采样和存储信号电压而获得并且形成所存储的采样值的差，并且其中在每个采样时间间隔之后的补偿时间间隔中，通过对所述信号电压进行采样和存储来产生补偿电压，所述补偿电压相对地叠加在所述补偿电压上信号电压，用于将补偿时间间隔内的信号电压补偿到零值，并被保持直到下一个补偿时间间隔，其中每个补偿时间间隔位于与接通磁场对应的时间间隔内，其中也是前一个采样时间间隔在于。

7. 发明授权

US5280727A Electromagnetic flow measuring tube and method of making same 失效
标题翻译：电磁流量测量管及其制作方法
公开(公告)号：US5280727A
公开(公告)日：1994-01-25
申请号：US786388
申请日：1991-11-01
申请人： Peter Hafner , Roland Unterseh
发明人： Peter Hafner , Roland Unterseh
IPC分类号： G01F1/58
CPC分类号： G01F1/58 , G01F1/584
摘要： An electromagnetic flow measuring tube is manufactured by forming an inner member which consists substantially of plastic and thereafter coating the inner member with a material which has a lower coefficient of thermal expansion and a higher mechanical strength than the material of the inner member to form an outer member which surrounds the inner member in a form-stabilizing stiffening manner. Thus, when the inner member is formed from plastic in hot condition, as for instance by injection molding, it can cool down and solidify in a relaxed condition, so that it is free of intrinsic mechanical stresses when the outer member is applied. This eliminates the danger of a detachment of the inner member from the outer member and of subsequent occurrence of cracks in the material of the inner member. Mounting flanges, stiffening webs and other structural elements are integrally formed with the plastic inner member. This permits a simple and economic manufacture of flow measuring tubes having a complicated shape.
摘要翻译：通过形成基本上由塑料构成的内部构件，然后用具有比内部构件的材料更低的热膨胀系数和更高的机械强度的材料涂覆内部构件来制造电磁流量测量管，以形成外部构件以形状稳定的加强方式围绕内部构件。因此，当内部构件由塑料在热状态下形成时，例如通过注射成型，其可以在松弛的状态下冷却和固化，使得当外部构件被施加时，其不具有固有的机械应力。这消除了内部构件从外部构件分离并随后在内部构件的材料中出现裂纹的危险。安装法兰，加强筋和其他结构元件与塑料内部构件一体形成。这允许简单和经济地制造具有复杂形状的流量测量管。

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