System for detecting the position of a movable element
阅读：372发布：2023-12-24
专利汇可以提供System for detecting the position of a movable element专利检索，专利查询，专利分析的服务。并且The system includes a position transducer connectible to an ac power supply for providing an electrical signal which is a function of the position of a movable member. The position transducer divides the ac input into at least two components with each component being a function of the position of the movable member. There is an average dc level of the ac signal in accordance with the relationship between the two components of the ac signal. A suitable crossover network separates the dc level from the ac and an indicator provides an indication of the position of the movable element in response to the dc level.，下面是System for detecting the position of a movable element专利的具体信息内容。
1. A system for detecting the position of a movable element and electrically connectible by first and second conductors to an alternating current power source capable of passing direct current, said system comprising: first and second electrically conductive paths extending between said conductors; means in said first path for blocking current flow from said second conductor to said first conductor and for permitting current to flow through said first path from said first conductor to said second conductor; means in said second path for blocking current flow from said first conductor to said second conductor and for permitting current to flow through said second path from said second conductor to said first conductor; a first impedance in said first path to impede the flow of current therethrough; a second impedance in said second path for impeding the flow of current therethrough, said second impedance including a variable impedance for varying the current flow through said second path whereby the current flowing through the conductors has an average value which is a function of the value of said first and second impedances; means responsive to movement of the movable element for varying the variable impedance so that the value of the variable impedance corresponds to the position of the movable element, the varying of the impedance of the variable impedance causing a corresponding variation in the average value of the current flow through said conductors whereby the amplitude of the average value is a function of the position of the movable element; means coupled to at least one of said conductors intermediate the alternating current power source and both of said paths and responsive to said average value for providing an indication of the position of the movable element; and said first impedance including a variable impedance, said system including means responsive to movement of the movable element for varying the last mentioned variable impedance so that the value of the last mentioned variable impedance corresponds to the position of the movable element with the value of the impedance of the last mentioned variable impedance varying inversely with the value of the impedance of the first mentioned variable impedance.
2. A system as defined in claim 1 wherein said first impedance includes a first resistance and said second impedance includes a second resistance.
3. A system as defined in claim 2 wherein each of said resistances has resistance characteristics responsive to an environmental parameter.
4. A system as defined in claim 1 wherein each of said variable impedances includes an inductive coil and a core adjacent said coil, and each of said means responsive to movement of the movable element includes means drivingly connected to the movable element for moving the core relative to the coil.
5. A system for monitoring a variable condition, such system being connectible by first and second conductors to an alternating current power source capable of passing direct current, said system comprising: first and second electrically conductive paths extending between said conductors; means in said first path for blocking current flow from said second conductor to said first conductor and for permitting current to flow through said first path from said first conductor to said second conductor; means in said second path for blocking current flow from said first conductor to said second conductor and for permitting current to flow through said second path from said second conductor to said first conductor; a first impedance in said first patH to impede the flow of current therethrough; a second impedance in said second path for impeding the flow of current therethrough, said second impedance including a variable passive impedance for varying the current flow through said second path whereby the current flowing through the conductors has a dc level which is a function of the value of said first and second impedances; means responsive to the variable condition for varying the variable passive impedance so that the value of the variable passive impedance is related to the variable condition, the varying of the variable passive impedance causing a corresponding variation in the dc level of the current flow through the conductors whereby the amplitude of the dc level is a function of the variable condition; and means adapted for coupling to at least one of the conductors intermediate the alternating current power source and both of said paths and responsive to said dc level for providing an indication of the variable condition.
6. A system as defined in claim 5 wherein said first impedance includes a variable passive impedance, said system including means responsive to the variable condition for varying the last mentioned variable passive impedance so that the value of the last mentioned variable passive impedance corresponds to the condition of the variable condition with the value of the impedance of the last mentioned variable passive impedance varying inversely with the value of the impedance of the first mentioned variable passive impedance.
7. A system as defined in claim 5 wherein said means in said first path includes a first diode and said means in said second path includes a second diode.
8. A system as defined in claim 5 wherein each of said first and second electrically conductive paths is devoid of amplifying devices.
9. A system as defined in claim 5 wherein said variable passive impedance includes an inductor and said means responsive to the condition of the variable condition varies the inductive reactance of said inductor.
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