-
11.发明授权Watthour meter comprising a Hall sensor and a voltage-frequency converter for very low voltages 失效瓦特表包括霍尔传感器和用于极低电压的电压 - 频率转换器
公开(公告)号：US4808918A
公开(公告)日：1989-02-28
申请号：US36772
申请日：1987-04-09
申请人： Miro Rozman
发明人： Miro Rozman
IPC分类号： G01R21/08 , G01R21/133 , G01R15/10
CPC分类号： G01R21/133 , G01R21/08
摘要： A watthour meter having a Hall component in a sensor circuit connected to a low voltage type of voltage-to-frequency converter, achieves linear signal conversion of the voltage output from the sensor circuit with maximum polarity reversal of the Hall voltage by synchronizing such polarity reversal with polarity reversal across an integration capacitor of the converter so that the amplified offset voltage produced by the integration operation and the effects of capacitor instability compensate for each other.
摘要翻译： 在与低压型电压 - 频率转换器连接的传感器电路中具有霍尔元件的瓦特表通过使这种极性反转同步来实现霍尔电压的最大极性反转从传感器电路输出的电压的线性信号转换 在转换器的积分电容器之间极性反转，使得由积分运算产生的放大的偏移电压和电容器不稳定性的影响相互补偿。
-
公开(公告)号：US4686459A
公开(公告)日：1987-08-11
申请号：US776729
申请日：1985-09-16
申请人： Henk W. A. Begas
发明人： Henk W. A. Begas
CPC分类号： G01R19/0007 , G01R13/406
摘要： A level indicator for displaying the decibel values of digital samples of an analog signal with respect to a reference value, each sample having a predetermined number of bits. The indicator comprises a shift register having a smaller bit capacity than the number of bits in the digital signals and for which, a resolution of 2dB, comprises three series-connected flip-flops. The digital signals are applied to the input of the first flip-flop and, together with the outputs of all the flip-flops, to a combinational logic circuit. The output of the last flip-flop is connected to a read-enable circuit. As each bit of a digital signal is shifted into the shift register, the logic circuit generates a logic signal from combination of the output signals of the flip-flops and such digital signal bit, the value of such logic signal indicating how many times a predetermined decibel amount should be applied to the value stored in the shift register in order to attenuate it to the reference value. An adder adds the value of such logic signal to the value of the logic signal previously produced by the logic circuit in response to the preceding bit of the digital signal, and the resulting sum is stored in a memory. When the number of digital signal bits in the shift register reaches the capacity of the shift register, the sum then in the memory is transferred to a read-out device by the read-enable circuit.
摘要翻译： 用于显示相对于参考值的模拟信号的数字样本的分贝值的电平指示器，每个采样具有预定数量的位。 指示器包括具有比数字信号中的位数更小的位容量的移位寄存器，并且其分辨率为2dB，包括三个串联连接的触发器。 数字信号被施加到第一触发器的输入，并且与所有触发器的输出一起被加到组合逻辑电路。 上一个触发器的输出端连接到读使能电路。 当数字信号的每个位被移入移位寄存器时，逻辑电路从触发器的输出信号和这种数字信号位的组合产生逻辑信号，这种逻辑信号的值表示预定的数量 应将分贝量应用于存储在移位寄存器中的值，以将其衰减到参考值。 加法器将逻辑信号的值与响应于数字信号的前一位的逻辑电路先前产生的逻辑信号的值相加，并将得到的和存储在存储器中。 当移位寄存器中的数字信号位的数量达到移位寄存器的容量时，存储器中的和然后由读使能电路传送到读出器件。
-
公开(公告)号：US4621228A
公开(公告)日：1986-11-04
申请号：US669973
申请日：1984-11-09
申请人： Kuni Toki , Osamu Sindou
发明人： Kuni Toki , Osamu Sindou
CPC分类号： G01R27/2605 , G01N27/122 , G01N27/223
摘要： A voltage signal associated with the moisture content of a sample in grain or sand form is converted into a digital signal value by an analog-to-digital converter. A programmable read-only memory capable of erasure and field rewriting has stored therein conditions for computation and calibration parameters associated with various types of the sample. Upon designation of one of the types, the conditions for computation for the designated type of sample are picked up, and a moisture content is computed and digitally indicated by use of the computation parameters for the designated sample type. This moisture content value can be compensated for temperature, and the conditions for computation and the calibration parameters in EPROM are capable of being erased or rewritten.
摘要翻译： 与晶粒或砂形样品的水分含量相关联的电压信号通过模数转换器转换为数字信号值。 能够进行擦除和场重写的可编程只读存储器中存储有用于与各种类型的样本相关联的计算和校准参数的条件。 在指定其中一种类型时，拾取指定类型的样品的计算条件，并且通过使用用于指定样品类型的计算参数来计算和数字地表示含水量。 该水分含量值可以补偿温度，EPROM中的计算条件和校准参数可以被擦除或重写。
-
公开(公告)号：US4447780A
公开(公告)日：1984-05-08
申请号：US315783
申请日：1981-10-28
CPC分类号： G06G7/24
摘要： A linearizing circuit (10) is disclosed for devices having logarithmic outputs, such as electrolytic oxygen detectors (12). The circuit (10) has an inverting biasing circuit (14) and a scaling circuit (16) connected to an antilog function generator (18) and is calibrated by zeroing the inverting biasing circuit (14) at an extreme point of the desired range and sealing a second point on the desired range in the scaling circuit (16).
摘要翻译： 对于具有对数输出的装置，例如电解氧检测器（12），公开了一种线性化电路（10）。 电路（10）具有反相偏置电路（14）和连接到防电磁函数发生器（18）的缩放电路（16），并通过使反相偏置电路（14）在所需范围的极点处置零， 将缩放电路（16）中的所需范围上的第二点密封。
-
公开(公告)号：US4000462A
公开(公告)日：1976-12-28
申请号：US566950
申请日：1975-04-10
IPC分类号： G01R1/04 , G01R15/18 , G01R19/145 , G01R15/10 , G01R19/14
CPC分类号： G01R1/04 , G01R15/183 , G01R19/145
摘要： Disclosed is the physical construction and electrical control circuit of a fault indicator designed to provide a watertight structure for the indicator. One face of the indicator is visible through the sealing apparatus, the sealing apparatus enclosing the structure on all sides other than the indicator face side. The indicator is capable of being submerged and will withstand a water pressure of 8 psig to meet specifications established by electric utilities. The electrical control circuit normally causes the transformer to operate below its saturation level resulting in quick response to changes in input current, and providing improved temperature stability of the control circuit.
摘要翻译： 公开了故障指示器的物理结构和电气控制电路，其设计用于为指示器提供防水结构。 通过密封装置可以看到指示器的一个表面，密封装置在除了指示器面侧之外的所有侧面上包围结构。 该指示器能够被淹没，并将承受8 psig的水压，以满足电力公司制定的规格。 电气控制电路通常会使变压器工作在饱和水平以下，从而快速响应输入电流的变化，并提供控制电路改善的温度稳定性。
-
公开(公告)号：US3781679A
公开(公告)日：1973-12-25
申请号：US3781679D
申请日：1973-02-05
申请人： MATSUMOTO T
发明人： MATSUMOTO T
CPC分类号： G01R15/005
摘要： A range switching circuit is comprised of a DC amplifier to which is supplied an electric signal to be recorded, a plurality of resistances corresponding to respective digit places within an entire recording range, and a range switching device for selectively connecting the resistances to a feedback path to the DC amplifier. A logarithmic characteristic generating circuit includes a logarithmic potentiometer to produce an output in accordance with the change in the level of the input signal. The outputs from the range switching circuit and the logarithmic characteristic generating circuit are delivered to a comparison circuit, which then produces an output corresponding to the difference therebetween. A servomotor responsive to the output from the comparison circuit drives the aforesaid range switching device and logarithmic potentiometer. A rotary switch is also driven by the servomotor to actuate a relay circuit for controlling the operation of the range switching device, which operates a writing mechanism to record the electric signal.
摘要翻译： 范围切换电路由向被记录的电信号供给的直流放大器，对应于整个记录范围内的相应数字位置的多个电阻以及用于选择性地将电阻连接到反馈路径的量程切换装置 到直流放大器。 对数特性产生电路包括对数电位器，以根据输入信号电平的变化产生输出。 来自范围切换电路和对数特性发生电路的输出被传送到比较电路，该比较电路产生对应于它们之间的差的输出。 响应于比较电路的输出的伺服电机驱动上述范围切换装置和对数电位器。 旋转开关也由伺服电机驱动，以驱动继电器电路，用于控制范围切换装置的操作，其操作写入机构以记录电信号。
-
17.发明授权Apparatus for measuring the value of an alternating electrical signal of any wave form 失效用于测量任何波形的替代电信号的值的装置
公开(公告)号：US3683275A
公开(公告)日：1972-08-08
申请号：US3683275D
申请日：1968-08-05
发明人： FOWLER ELIOT PATRICK
CPC分类号： H03G3/3015 , G01R19/03 , G01R19/225 , G01T3/00
摘要： The measurement of an a.c. signal is accomplished by feeding the signal through an a.c. amplifier having variable gain to a detector from which a d.c. signal characteristic is extracted indicative of its value. The d.c. signal is fed back to control the amplifier gain and maintain the level of the detector input within a limited range.
摘要翻译： a.c.的测量。 信号通过馈送信号通过交流电来实现。 放大器具有可变增益到检测器， 提取指示其值的信号特性。 直径 反馈信号以控制放大器增益，并将检测器输入的电平保持在有限的范围内。
-
18.发明授权
公开(公告)号：US3657649A
公开(公告)日：1972-04-18
申请号：US3657649D
申请日：1970-11-20
申请人： ROBERTO ODORICI
发明人： ODORICI ROBERTO
摘要： A meter for measuring alternating electrical quantities. The meter is particularly designed to provide readings of different ranges of these quantities on the same scale. An electrical circuit of the meter is provided with a pair of rectifiers which are connected in series, and a range changer coacts with one of the rectifiers for connecting it into and disconnecting it from the circuit when the range changes.
摘要翻译： 用于测量交流电量的仪表。 该仪表特别设计用于提供相同规模的这些数量的不同范围的读数。 仪表的电路设有串联连接的一对整流器，范围更换器与整流器之一共同作用，用于在范围变化时将其连接到电路中并与电路断开连接。
-
公开(公告)号：US3652934A
公开(公告)日：1972-03-28
申请号：US3652934D
申请日：1969-08-05
发明人： PALJUG JOSEPH W , BRODY SAMUEL S
摘要： A high impedance, solid state log-linear amplifier (electrometer) of drift free repeatable character includes a multiple range linear amplifier and a logarithmic amplifier continuously adjustable to accept several decades of input current. The overall unit includes an internal calibration source and has a pair of output ports which are separately adjustable relative to the input current to provide dual readout for a single input as where one readout is to be interfaced into a computer while the other readout is to provide a visual entry on a strip chart recorder.
摘要翻译： 具有漂移自由重复特性的高阻抗固态对数线性放大器（静电计）包括多范围线性放大器和对数放大器，可连续调节以接受几十年的输入电流。 整个单元包括内部校准源，并且具有一对输出端口，其相对于输入电流可分开调节，以便为单个输入提供双重读数，其中一个读数将被连接到计算机中，而另一个读数将提供 条形图记录器上的视觉条目。
-
公开(公告)号：US3638114A
公开(公告)日：1972-01-25
申请号：US3638114D
申请日：1969-12-31
申请人： NASA
发明人： FINLEY TOM D
CPC分类号： G01R15/08
摘要： A nonlinear circuit connected to the output of a currentproducing transducer to form a split range transducer. In the range where most of the data to be measured is expected, the resolution is high and in the other range the resolution is lower.
摘要翻译： 连接到电流产生换能器的输出的非线性电路，以形成分离范围换能器。 在预期要测量的大多数数据的范围内，分辨率高，而在另一范围内分辨率较低。
-
-
-
-
-
-
-
-
-
搜索结果
88 条记录 (耗时 0.018 秒)
