Automatic calibrating and measuring system
阅读：60发布：2022-07-12
专利汇可以提供Automatic calibrating and measuring system专利检索，专利查询，专利分析的服务。并且A system with a test position for measuring the amplitude (or phase) of an incoming signal wave of predetermined frequency is repetitively switched over to a calibrating position in which the system receives a reference oscillation of constant frequency and phase for automatically readjusting its circuits, if necessary. If the input signal disappears or drops below a certain minimum level, a sensing circuit reduces the rate of switchover or arrests the system in test position to reduce wear of the relay contacts employed therefor. A random or quasi-random change in that rate may be utilized to prevent false indications due to the stroboscopic effect of periodic switchover in the presence of a modulating frequency close to the switching rate.，下面是Automatic calibrating and measuring system专利的具体信息内容。
1. A circuit arrangement for giving a calibrated indication of a parameter of an alternating signal voltage of predetermined frequency, comprising: circuit means connectable to a source of signal voltage to be measured; local oscillator means for generating a reference oscillation of said predetermined frequency; indicator means for measuring said parameter; sensing means for varying the transmission characteristic of said circuit means; automatic switchover means for alternately establishing a test position connecting said indicator means through said circuit means to said source and a calibrating position connecting said sensing means through said circuit means to said oscillator means; and threshold means connected to said circuit means for ascertaining the magnitude of said signal voltage in said test position and reducing the rate of operation of said switchover means upon said magnitude falling below a predetermined level.
2. A circuit arrangement for giving a calibrated indication of a parameter of an alternating signal voltage of predetermined frequency, comprising: circuit means connectable to a source of signal voltage to be measured; local oscillator means for generating a reference oscillation of said predetermined frequency; indicator means for measuring said parameter; sensing means for varying the transmission characteristic of said circuit means; automatic switchover means for alternately establishing a test position connecting said indicator means through said circuit means to said source and a calibrating position connecting said sensing means through said circuit means to said oscillator means; and threshold means connected to said circuit means for ascertaining the magnitude of said signal voltage in said test position and arresting the operation of said switchover means in said test position upon said magnitude falling below a predetermined level.
3. A circuit arrangement for giving a calibrated indication of a parameter of an alternating signal voltage of predetermined frequency, comprising: circuit means connectable to a source of signal voltage to be measured; local oscillator means for generating a reference oscillation of said predetermined frequency; indicator means for measuring said parameter; sensing means controlling said circuit means for varying the transmission characteristic thereof; astable multivibrator means provided with reactive circuitry for establishing a testing interval and a calibration interval alternating in a rhythm determined by the time constant of said circuitry; switch means controlled by said multivibrator means for connecting said indicator means through said circuit means to said source during said testing interval and for connecting said sensing means through said circuit means to said oscillator means during said calibration interval; and a generator of irregularly varying control voltages coupled to said reactive circuitry for altering said time constant.
4. A circuit arrangement for giving a calibrated indication of a parameter of an alternating signal voltage of predetermined frequency, comprising; circuit means connectable to a source of signal voltage to be measured; local oscillator means for generating a reference oscillation of said predetermined frequency; indicator means for measuring said parameter; sensing means controlling said circuit means for varying the transmission characteristic thereof; astable multivibrator means provided with reactive circuitry for establishing a testing interval and a calibration interval alternating in a rhythm determined by the time constant of said circuitry; switch means controlled by said multivibrator means for connecting said indicator means through said circuit means to said source during said testing interval and for connecting said sensing means through said circuit means to said oscillator means during said calibration interval; voltage-responsive control means coupled to said reactive circuitry for altering said time constant; and a generator of input voltage including threshold means connected to said circuit means for ascertaining the magnitude of said signal voltage in said test position and actuating said control means to lower said time constant upon said magnitude falling below a predetermined level.
5. A circuit arrangement as defined in claim 4 wherein said indicator means comprises an amplitude meter.
6. A circuit arrangement as defined in claim 4 wherein said indicator means comprises a phase meter.
7. A circuit arrangement as defined in claim 6 wherein said circuit means includes a phase shifter controlled by said sensing means and a phase comparator following said phase shifter, said switch means comprising contacts interposed between said comparator and said meter, said threshold means comprising a voltage detector connected to said circuit means ahead of said comparator.
8. A circuit arrangement as defined in claim 4 wherein said switch means comprises at least one pair of relays in series with respective sections of said multivibrator means, said relays being provided with paired contacts respectively making and breaking upon energization of either of said sections.
| 标题 | 发布/更新时间 | 阅读量 |
|---|---|---|
| 基于人-车-路耦合振动模型的动力响应预测方法及系统 | 2020-05-08 | 679 |
| 一种基于P300的视听双通道竞争机制脑-机接口方法 | 2020-05-11 | 848 |
| 一种导电结构及其制备方法、触摸面板及显示装置 | 2020-05-11 | 698 |
| 基于非线性疲劳累积损伤机理退化-冲击模型的建模方法 | 2020-05-11 | 60 |
| 一种人工智能在季节性负荷预测中的应用方法 | 2020-05-12 | 420 |
| 一种卫星轨道机动状态实时监测方法 | 2020-05-13 | 846 |
| 一种毫米波蜂窝网络的小区间干扰协调方法 | 2020-05-13 | 139 |
| 一种面向电力通信网的业务运行的业务路由寻址方法 | 2020-05-13 | 250 |
| 一种考虑信息系统作用的有源配电网多视角协同脆弱性评估方法 | 2020-05-14 | 407 |
| 一种基于建模仿真的化学电池储能应用分析方法 | 2020-05-13 | 901 |
高效检索全球专利专利汇是专利免费检索,专利查询,专利分析-国家发明专利查询检索分析平台，是提供专利分析，专利查询，专利检索等数据服务功能的知识产权数据服务商。
我们的产品包含105个国家的1.26亿组数据，免费查、免费专利分析。
分析报告
专利汇分析报告产品可以对行业情报数据进行梳理分析，涉及维度包括行业专利基本状况分析、地域分析、技术分析、发明人分析、申请人分析、专利权人分析、失效分析、核心专利分析、法律分析、研发重点分析、企业专利处境分析、技术处境分析、专利寿命分析、企业定位分析、引证分析等超过60个分析角度，系统通过AI智能系统对图表进行解读，只需1分钟，一键生成行业专利分析报告。
QQ群二维码
意见反馈
意见反馈