摘要:
A liquid level detecting device and a fuel tank structure are obtained that do not require provision of plural, independent detection electrodes. A liquid level detecting device 40 has a pair of electrode plates (42, 44), and has a first detection electrode (70A) that detects electrostatic capacitance between the pair of electrode plates, and a variable structure (60) that can vary a surface area of an overlapping region of the pair of electrode plates (42, 44) and can switch to a second detection electrode (70B) by changing the surface area by a predetermined amount with respect to the first detection electrode (70A).
摘要:
PROBLEM TO BE SOLVED: To provide a dispensation apparatus capable of correctly detecting the liquid level of a liquid by discriminating a steep noise of static electricity and a signal in liquid level contact, an analyzer and a liquid level detection method.SOLUTION: A dispensation apparatus 12 includes: a storage section 35 for storing a voltage correction coefficient for each specimen and a voltage correction coefficient based on the kind of a container accommodating the specimen; an information reader for acquiring specimen information and container information; a calculation section 12u for calculating a threshold voltage on the basis of the voltage correction coefficient of the specimen and the voltage correction coefficient of the container which are extracted from the storage section 35; and a determination section 12t in which, when a signal received by a dispensation probe 12b outputs the threshold voltage for a predetermined period or longer, a liquid level detection is determined.
摘要:
PROBLEM TO BE SOLVED: To provide an electronic circuit of a liquid level measuring probe which is hardly affected by heat. SOLUTION: A capacitance type liquid level measuring probe 10 includes two concentric metal tubes 12, 14 which are extended downward into an oil tank. The concentric metal tubes 12, 14 form two plates of a capacitor. The probe 10 measures an oil level in the tank during a test of a jet engine by detecting a change of the electric capacity between the two concentric metal tubes 12, 14, wherein the change of the capacitance is generated by a level change of the oil. A measuring circuit 30 includes a temperature compensation resistor and a temperature stabilization detector. A measuring electronic circuit package is stored separately, and connected to the probe 10 through a cable 44, and thereby a circuit 30 can be arranged on a position separated from a hot environment in which the probe 10 is operated. COPYRIGHT: (C)2011,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a liquid tank accurately measuring a volume by reducing an effect of disturbance on a measurement result, and a fuel cell using the same.SOLUTION: One surface of a liquid container section is configured of a detection element formed by sequentially stacking a first substrate to a fourth substrate, each consisting of a printed circuit board. A pair of detection electrodes 12A and 12B are arranged on the surface of the first substrate, and a floating capacitance is detected by directly or indirectly bringing the pair of detection electrodes 12A and 12B into contact with a liquid fuel in the liquid container section. A second substrate having a shield electrode 22 is disposed on the back surface of the first substrate. Even when a hand or the like is put close to the detection element, the resulting floating capacitance is prevented from being sensed by the detection electrodes 12A and 12B.
摘要:
The reagent volume dispensed into wells (3) of a test plate (2) is determined by moving an upper electrode (5) of specific profile into each well to an optimum position above the well bottom, by determining the capacitance value of the capacitor formed by the upper electrode in each well and a lower electrode (6) arranged adjacent to the lower outside surface (11) of the test plate below each well, and by comparing the measured capacitance value with reference calibration values.
摘要:
PROBLEM TO BE SOLVED: To provide a liquid reducing agent discriminating device having high accuracy in empty discrimination than before. SOLUTION: A concentration sensor and a water level sensor are provided on a storage tank of a liquid reducing agent, and empty discrimination is performed by using the water level based on the water level sensor in addition to the concentration based on the concentration sensor (Step 3 and Step 5). Even when any improper signal indicating an empty state is given by adhesion of bubbles to the concentration sensor though the remaining amount of the liquid reducing agent is sufficient, the water level sensor does not indicate any signal showing an empty state. Thus, any improper discrimination is prevented, and correct discrimination can be implemented. COPYRIGHT: (C)2009,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To highly accurately measure the water level of a liquid stored in a liquid tank. SOLUTION: The water level L 0 of the liquid is read from a water level gauge mounted to the liquid tank (S1). A filter value FLT is computed by applying a filter having a time constant greater than one second to the water level L 0 (S2). When the filter value FLT is smaller than a minimum value Min, the minimum value Min is sequentially updated by the filter value FLT (S3 and S4). The minimum value Min is outputted as a final water level L (S5). Since a minimum value utilizing characteristics of liquid level variations is adapted as the final water level L even if the water level L 0 varies due to oscillations of the liquid level to make it difficult to receive the effects of liquid oscillations in this way, it is possible to improve accuracy in water level measurement. COPYRIGHT: (C)2008,JPO&INPIT