会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 94. 发明授权
    • Thermostat with adaptive operating cycle
    • US4408711A
    • 1983-10-11
    • US401787
    • 1982-07-26
    • Michael R. Levine
    • Michael R. Levine
    • G05D23/20F24D5/10G05D23/32
    • G05D23/20G05D23/1913G05D23/1917
    • An electronic thermostat operative to be connected to a furnace or other temperature modifying apparatus, to control its state of operation, includes means for generating a desired temperature set point signal and means for measuring ambient temperature on the thermostat. When the ambient temperature falls below the set point the furnace is energized for a predetermined period of time. The time of energization is increased or decreased by a small increment after each heating cycle depending upon magnitude of the temperature increase which occurred at the thermostat as a result of the heating cycle in order to adaptively achieve a predetermined temperature increase during the heating cycle and the thermal overshoot period which occurs following de-energization of the furnace.In alternative embodiments of the invention the period of time in which the furnace is de-energized between heating cycles is controlled by a timer and adaptively modified in a similar manner, and the time delay between furnace energization and initiation of the blower at the beginning of a heating cycle and de-energization of the blower after the end of the heating cycle are similarly adaptively modified.
    • 99. 发明授权
    • Process control
    • 过程控制
    • US4346433A
    • 1982-08-24
    • US129295
    • 1980-03-11
    • Robert W. Rutledge
    • Robert W. Rutledge
    • G05B11/42G05D23/20G06G7/66G05B13/04
    • G05B11/42G05D23/1917G05D23/20
    • A process control system is provided in which a process variable is compared to a set point for the process variable by a process controller with the results of the comparison being utilized to control the process in such a manner that the process variable will be substantially equal to the set point for the process variable. A critically damped response of the process variable to a change in the set point is achieved by utilizing a process controller which has the characteristics of a proportional-integral-derivative controller followed by a first order lag. Tuning of the process controller is accomplished by changing a time constant which is common to the proportional, integral and derivative terms of the proportional-integral-derivative controller and also common to the first order lag.
    • 提供了一种过程控制系统,其中过程变量通过过程控制器与过程变量的设定点进行比较,其中比较结果被用来控制过程,使得过程变量将基本等于 过程变量的设定点。 通过使用具有比例 - 积分微分控制器的特征的后处理阶数滞后的过程控制器来实现过程变量对设定点的变化的严重阻尼响应。 过程控制器的调整是通过改变比例积分微分控制器的比例,积分和微分项共同的时间常数来实现的,并且也与一阶滞后相同。
    • 100. 发明授权
    • Apparatus for automatic regulation of AC power
    • 用于自动调节交流电源的装置
    • US4346339A
    • 1982-08-24
    • US201936
    • 1980-10-29
    • Walter S. Lewandowski
    • Walter S. Lewandowski
    • G05D23/20G05F1/455
    • G05D23/20G05D23/1906
    • A closed loop phase control circuit. The circuit senses the temperature of a load circuit. It also senses the line voltage on each line of a multi-phase system. The sensed line voltage is full-wave rectified. Comparators for each phase compare an input signal indicative of the temperature of the load circuit with the full-wave rectified line voltage in the corresponding phase and develops an output signal when the full-wave rectified line voltage exceeds the input signal indicative of the temperature of the load circuit. Ultimately, triacs, which are in series with the load for each phase, respond to the existence of an output signal from the corresponding comparators and to a pulse from a timer and conduct in response thereto. When a triac conducts, line current is delivered to its corresponding load resistance. In this way, the time for delivery of line current (and line voltage) to the load resistance varies in accordance with the temperature of the load. Therefore, power to the load resistance is regulated in accordance with the thermal condition of the load resistance. A set point temperature at the load is thereby maintained.
    • 闭环相位控制电路。 该电路检测负载电路的温度。 它还可以检测多相系统各线路上的线路电压。 检测到的线路电压是全波整流的。 每相的比较器将表示负载电路的温度的输入信号与相应相位中的全波整流线电压进行比较,当全波整流线电压超过表示温度的输入信号时,产生输出信号 负载电路。 最终,与每个相位的负载串联的三端双向可控硅开关元件响应于来自相应的比较器的输出信号的存在和来自定时器的脉冲以及对其的响应。 当三端双向可控硅开关导通时,线路电流被传递到其相应的负载电阻。 以这种方式,将线路电流(和线路电压)传递到负载电阻的时间根据负载的温度而变化。 因此,根据负载电阻的热条件来调节负载电阻的功率。 由此保持负载下的设定点温度。