-
公开(公告)号：US3662845A
公开(公告)日：1972-05-16
申请号：US3662845D
申请日：1970-07-27
发明人： PRATT CHAPIN A
CPC分类号： G01G19/021 , G01G3/147 , H03M1/52 , Y10S177/03
摘要： An electrical system having an analog-to-digital dual ramp converter wherein an analog input signal to be converted into recurrent digital form is applied to the input of the converter''s integrator circuit for a first, predetermined time interval and a known, predetermined analog reference signal is applied to the input of the integrator in response to a predetermined control signal for a second time interval that is proportional to the magnitude of the analog input signal. A series of sequentially occurring pulses of fixed time separation are produced by a pulse generator and are transmitted by a gate to a pulse counter. The gate, which is under the control of the integrator output, will be open for the two time intervals during which the integrator output deviates from a predetermined level in a predetermined direction. At the beginning of the first time interval the counter is reset to a predetermined starting count, and it will be driven by the gated generator-produced pulses to a predetermined intermediate scale count which is less than the full scale count. At this time, the previously mentioned control signal is supplied from the counter for applying the reference signal to the integrator. The control signal is also gated by a logic circuit to reset the counter. The logic circuit is conditioned by the reset signal and the occurrence of the control signal at the end of the first time interval to inhibit any reoccurrence of the control signal during the second time interval in which the counter is being driven by the generator-produced pulses to supply a digital output representing the magnitude of the analog input signal.
摘要翻译： 具有模拟 - 数字双斜变换器的电气系统，其中要转换为复数数字形式的模拟输入信号被施加到转换器的积分器电路的输入端，持续第一预定时间间隔和已知的预定模拟参考信号 响应于与模拟输入信号的幅度成比例的第二时间间隔的预定控制信号，将其应用于积分器的输入。 一系列顺序发生的固定时间间隔脉冲由脉冲发生器产生，并由门传输到脉冲计数器。 处于积分器输出控制下的门将在积分器输出在预定方向上偏离预定水平的两个时间间隔内打开。 在第一时间间隔开始时，计数器被复位到预定的起始计数，并且它将被门控发电机产生的脉冲驱动到小于满量程计数的预定中间标度计数。 此时，从计数器提供先前提到的控制信号，以将参考信号施加到积分器。 控制信号也由逻辑电路选通以复位计数器。 该逻辑电路由第一时间间隔结束时的复位信号和控制信号的出现来调节，以在计数器被发电机驱动的第二时间间隔期间抑制控制信号的再次发生， 产生脉冲以提供表示模拟输入信号幅度的数字输出。
-
公开(公告)号：US3659665A
公开(公告)日：1972-05-02
申请号：US3659665D
申请日：1970-07-27
CPC分类号： G01G3/1406 , G01G3/147 , G01G13/24 , Y10S177/03
摘要： A weighing apparatus and method wherein an electrical analog signal, having a level representative of the weight of a load, is converted into a digital pulse train by an analog-to-digital converter. A counter for counting the converter-produced pulses is connected to one or more devices that provide a readout of the weight in visual and/or printed form. A program circuit is operatively connected to the converter and the counter, and selected circuit connections are made in the program for providing a selected one or more of the following conditions: (1) the division of the pulse train by a pre-selected divisor to count in only the quotient at the counter (2) the transfer of selected information from the counter to the readout devices to cause the weight to be read out by counting in any of a plurality of different increments such as ones, twos, or fives. Additional features pertain to tare circuits for taring the weightrepresenting signal.
摘要翻译： 一种称重装置和方法，其中具有代表负载重量的电平的电模拟信号通过模数转换器转换成数字脉冲串。 用于对转换器产生的脉冲进行计数的计数器连接到一个或多个提供以视觉和/或打印形式读取重量的装置。 程序电路可操作地连接到转换器和计数器，并且在程序中进行选择的电路连接以提供所选择的一个或多个以下条件：（1）将脉冲序列除以预先选择的除数到 只计数在计数器（2）的商，将所选择的信息从计数器传送到读出装置，以通过以多个不同增量（例如，二，或五）中的任一个进行计数来读出重量。 额外的功能属于去皮重量信号的皮重电路。
-
公开(公告)号：US3692129A
公开(公告)日：1972-09-19
申请号：US3692129D
申请日：1971-04-12
发明人： PRATT CHAPIN A , GODWIN GILBERT A
CPC分类号： G01G3/14 , G01G3/142 , G01G19/021 , Y10S177/03
摘要： An electrical load cell-type weighing system having a plurality of load cells supporting a load-receiving structure and providing electrical potentials, the sum of which is a function of the weight of a load applied to the load-receiving structure. Summing resistor networks directly connect the load cell bridges independently of each other to a summing junction of a single ended operational summing amplifier. The potentials produced by the load cells are algebraically summed at the summing junction. Another disclosed feature pertains to a defective load cell testing circuit comprising a switch for selectively providing a short circuit connection across the output terminals of each load cell bridge to determine whether the load cell is defective. Another feature pertains to a special operational amplifier summing network which selectively provides weight measurements in different units of mass such as pounds and kilograms.
摘要翻译： 一种电力称重传感器型称重系统，其具有支撑负载接收结构并提供电位的多个称重传感器，其总和是施加到负载接收结构的负载的重量的函数。 求和电阻网络独立于ea直接连接称重传感器桥
-
-
搜索结果
3 条记录 (耗时 0.011 秒)