公开(公告)号：US06409969B1

公开(公告)日：2002-06-25

申请号：US09323199

申请日：1999-06-01

Applicant: Steven R. Streicher ,  James A. Freeman ,  John E. Taylor

Inventor： Steven R. Streicher ,  James A. Freeman ,  John E. Taylor

IPC: G01N3112

CPC classification number: G01N27/123

Abstract: The present invention contemplates a system and method for controlling or adjusting the accuracy of an exhaust gas sensor utilizing the impedance of the sensing element. In one embodiment, a periodic AC signal is superimposed over low frequency or DC output signal produced by the gas sensor. The AC current flowing through the gas sensor is a function of the actual impedance of the sensor, which is in turn a function of the temperature of the sensor. Thus, the invention further contemplates an impedance sensor circuit connected to an output of the gas sensor. The output of the impedance sensor circuit is a peak voltage that is indicative of the AC voltage drop across the sensor, and ultimately the impedance of the sensing element. This peak voltage is utilized to control the operation of the heating element in a closed loop control system in which the thermal output of the heating element is continuously varied as a function of the magnitude signal to accurately maintain a consistent temperature for the exhaust gas sensor. In a specific embodiment of the invention, the impedance sensor circuitry includes a bandpass filter centered around the frequency of the superimposed AC signal to eliminate spurious noise. The output from the bandpass filter is provided to a half-wave rectifier, the output of which is the peak voltage signal indicative of the sensor impedance.

Abstract translation: 本发明考虑了利用感测元件的阻抗来控制或调节排气传感器精度的系统和方法。 在一个实施例中，周期性交流信号叠加在由气体传感器产生的低频或直流输出信号上。 流过气体传感器的交流电流是传感器的实际阻抗的函数，传感器的阻抗又是传感器温度的函数。 因此，本发明进一步考虑了连接到气体传感器的输出的阻抗传感器电路。 阻抗传感器电路的输出是表示传感器上的AC电压降的峰值电压，最终表示感测元件的阻抗。 该峰值电压用于控制闭环控制系统中的加热元件的操作，其中加热元件的热​​输出作为幅度信号的函数连续变化，以准确地维持排气传感器的一致的温度。 在本发明的具体实施例中，阻抗传感器电路包括以叠加的AC信号的频率为中心的带通滤波器，以消除杂散噪声。 来自带通滤波器的输出被提供给半波整流器，其输出是表示传感器阻抗的峰值电压信号。

公开(公告)号：US07109832B2

公开(公告)日：2006-09-19

申请号：US11183711

申请日：2005-07-18

Applicant: James A. Freeman

Inventor： James A. Freeman

IPC: H01H53/00

CPC classification number: H01H50/021 ,  H01H50/548 ,  H01H2059/0027

Abstract: In one embodiment, a method for reducing signal noise in a relay having pass-through and attenuator circuits which are alternately closed by operation of an armature assembly of the relay is disclosed. In accordance with the method, the armature assembly is provided with a grounding portion. The grounding portion of the armature assembly is oriented to make contact with the pass-through circuit when the attenuator circuit is closed, but not when the pass-through circuit is closed.

Abstract translation: 在一个实施例中，公开了一种用于降低具有通过和衰减器电路的继电器中的信号噪声的方法，所述继电器和衰减器电路通过继电器的电枢组件的操作而交替关闭。 根据该方法，电枢组件设置有接地部分。 当衰减器电路闭合时，电枢组件的接地部分被定向成与通过电路接触，而当通电电路闭合时不接地部分。

公开(公告)号：US06577488B1

公开(公告)日：2003-06-10

申请号：US09484107

申请日：2000-01-14

Applicant: Betty-Rose G. Seifert ,  James A. Freeman ,  Salvatore Albanese

Inventor： Betty-Rose G. Seifert ,  James A. Freeman ,  Salvatore Albanese

IPC: H01H4700

CPC classification number: H01H47/325 ,  F02D41/20 ,  F02D2041/2006 ,  F02D2041/2041 ,  H01F7/1883 ,  H01F2007/1822

Abstract: An inductive load driver having an inductive load and a bridge circuit connected in parallel with the inductive load, wherein the bridge circuit generates a current to the inductive load that rapidly rises.

Abstract translation: 一种感性负载驱动器，其具有与感性负载并联连接的感性负载和桥式电路，其中桥式电路产生快速上升的感性负载的电流。

公开(公告)号：US06933816B2

公开(公告)日：2005-08-23

申请号：US10941352

申请日：2004-09-14

Applicant: James A. Freeman

Inventor： James A. Freeman

IPC: H01H50/02 ,  H01H50/54 ,  H01H51/22

CPC classification number: H01H50/021 ,  H01H50/548 ,  H01H2059/0027

Abstract: In one embodiment, a method for reducing signal noise in a relay having pass-through and attenuator circuits which are alternately closed by operation of an armature assembly of the relay is disclosed. In accordance with the method, the armature assembly is provided with a grounding portion. The grounding portion of the armature assembly is oriented to make contact with the pass-through circuit when the attenuator circuit is closed, but not when the pass-through circuit is closed.

公开(公告)号：US06853273B2

公开(公告)日：2005-02-08

申请号：US10028254

申请日：2001-12-20

Applicant: James A. Freeman

Inventor： James A. Freeman

IPC: H01H50/02 ,  H01H50/54 ,  H01H51/22 ,  H01H51/30 ,  H01H51/27

CPC classification number: H01H50/021 ,  H01H50/548 ,  H01H2059/0027

Abstract: Disclosed herein is a relay having a first circuit, a second circuit, a ground, an electro-magnetic actuator assembly, and an armature assembly. The armature assembly is movable between first and second positions with respect to the first and second circuits, and is controlled by the electro-magnetic actuator assembly. Movement of the armature assembly to its first position allows current to flow through the first circuit. Movement of the armature assembly to its second position couples the first circuit to the ground and allows current to flow through the second circuit. The ground may be embodied in an extension of the armature assembly that contacts the first circuit when the armature assembly moves to its second position, or the ground may be embodied in a biased conductor that is moved into contact with the first circuit when the armature assembly moves to its second position.

Abstract translation: 这里公开了具有第一电路，第二电路，接地，电磁致动器组件和电枢组件的继电器。 电枢组件可相对于第一和第二电路在第一和第二位置之间移动，并且由电磁致动器组件控制。 电枢组件移动到其第一位置允许电流流过第一电路。 电枢组件移动到其第二位置将第一电路耦合到地，并允许电流流过第二电路。 当电枢组件移动到其第二位置时，接地可以体现在与电枢组件接触的电枢组件的延伸部分中，或者当电枢组件移动到接地时，接地可以被实施在与第一电路接触的偏置导体中 移动到第二个位置。