Probe mounted electronics for fuel gage system
阅读：824发布：2022-05-05
专利汇可以提供Probe mounted electronics for fuel gage system专利检索，专利查询，专利分析的服务。并且A capacitance fuel gaging system having a probe which includes a capacitor whose capacitance is dependent on the level of the fuel and capacitance to DC current conversion means. A DC supply is externally connected to the probe for energizing the conversion means, and an indicator is externally connected to the probe for displaying the output.，下面是Probe mounted electronics for fuel gage system专利的具体信息内容。
1. A capacitance fuel gage device comprising a probe, at least part of which is to be immersed in the fuel, said probe including: a. a first capacitor, the capacitance of which is a function of the level of said fuel; b. electronic circuitry, including a high frequency, free running astable multivibrator whose output is connected to one side of said first capacitor; first and second oppositely poled diodes each having a side connected to the other side of said first capacitor, the first of which has its other side connected to ground; a second capacitor connected between the other side of the second diode and ground; c. first terminal means adapted to be connected to an external DC supply means for energizing said electronic circuitry; and d. second terminal means at the other side of said second diode adapted to be connected to an external indicator means.
2. A device as in claim 1 wherein said indicator is an ammeter.
3. A device as in claim 1 wherein said probe further includes variable resistance means connected between said electronic circuitry and said second terminal means.
4. A device as in claim 1 further including full scale adjustment means connected to said second terminal means.
5. A device as in claim 1 wherein said electronic circuitry further includes a zener diode connected so as to be in parallel with said DC supply means.
6. A device as in claim 1 and wherein said probe is connected to ground.
7. A device as in claim 1 and wherein said electronic circuitry further includes a third capacitor whose one side is connected to said output from said multivibrator in parallel with said first capacitor; a third diode connected between the other side of said third capacitor aNd ground; a fourth diode connected between said other side of said third capacitor and said other side of said second diode, and a variable resistor connected between said other side of said second diode and said first terminal means, each of said third and fourth diodes respectively connected in opposition to said first and second diodes.
8. A capacitance fuel gage device comprising, a probe, at least part of which is to be immersed in the fuel, said probe including: a. a first capacitor, the capacitance of which is a function of the level of said fuel; b. electronic circuitry, including a high frequency, free running astable multivibrator having first and second outputs, said first capacitor being connected into the multivibrator to form one side of the capacitive interconnection therein, and a second variable capacitor connected into the multivibrator to form the other side of said capacitive interconnection therein for zero adjustment of said probe; c. first terminal means adapted to be connected to an external DC supply means for energizing said electronic circuitry; and d. second and third terminal means connected respectively to the outputs of said multivibrator adapted for connection therebetween of a differential voltmeter.
9. A device as in claim 8 and wherein said electronic circuitry further includes a zener diode connected so as to be in parallel with said DC supply means.
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