JPS6040919A - Liquid quantity meter - Google Patents

Abstract

PURPOSE:To obtain a liquid quantity meter, whose detecting error of the liquid quantity is small even though a liquid tank is inclined, by providing a resistor line along the central position of the cross section of the liquid tank, and arranging a float, which is provided with an electrode contacting the resistor line. CONSTITUTION:A resistor line 3 is provided along the central position of the cross section of a liquid tank 1. A float 4, which is moved up and down along the resistor line 3 together with the surface of a liquid 2, is provided. An electrode 5 contacting the resistor line 3 is attached to a float 4. A voltage is applied to fixed electrodes 10 and 11 at both ends of the resistor line 3 from a power source 12 through a resistor 13. Divided voltages corresponding to the up and down position of the float 4 are obtained from the electrode 5. The amount of the liquid is displayed on a display part 15 through a display driving circuit 14. Since the height of the central position of the liquid 2 is scarecely changed even though the liquid tank 1 is inclined, the amount of the liquid can be accurately detected with few errors.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the configuration of a liquid level meter that can be used to detect the entire amount of gasoline remaining in a gasoline tank of an automobile, and the present invention relates to a configuration of a liquid level meter that can be used to detect the entire amount of gasoline remaining in a gasoline tank of an automobile. The aim is to provide something with less.

This type of liquid meter, which has been used conventionally, has a float floating on the end of a liquid tank, such as a gasoline tank, and converts the vertical movement of the float into an electrical signal using a variable resistor or the like via an arm. The system was designed to give instructions using a meter. However, such conventional devices have the disadvantage that when the liquid tank is tilted, such as when a car climbs a hill, the indication changes and the correct amount of liquid cannot be detected.

Therefore, an object of the present invention is to eliminate such conventional drawbacks and provide a liquid level meter with less error in detecting liquid level even if the liquid tank is tilted. This will be explained in detail with reference to the following.

FIG. 1 and FIG. 2 show an embodiment, where 1 is a liquid tank in which a liquid 2 such as gasoline is held. In the present invention,
Inside this liquid tank 1, a resistance wire 3 is placed along the center position of the cross section when the liquid tank 1 is cut horizontally at an arbitrary position.
A float 4 that moves up and down according to the surface of the liquid 2 is provided along this resistance wire 3, and a resistance wire 3 is attached to this float 4.
The feature is that an electrode 5 is provided in contact with the .

The embodiment shown in FIG. 1 is used when the rectangular parallelepiped liquid tank 1 is held horizontally, and the resistance line 3 in this case is on a line connecting the center positions of the top and bottom surfaces of the liquid tank 1. It will be placed in On the other hand, if the rectangular parallelepiped liquid tank 1 is normally installed obliquely as in the embodiment shown in FIG. The resistance wire 3 may be provided along a line plotted from the bottom 1 from both sides at the middle/b position of each cross section when cut horizontally at the position.

For example, the float 4 is arranged so that the liquid tank 1 can be tilted from its normal position like in a car, as shown in Fig. 3.

As shown in Fig. 4, a synthetic resin is made into a floating bladder, a large hole 6 is provided in the center, and a resistance wire 3 is inserted between bearings 8 that are loosely pressed by springs 7 from all sides toward the center. Just leave it there. In this case,
The bearing 8 is used as the electrode 5 and is pulled out via the spring 7 and the holding screw 9. Of course, any other shape may be used.

Then, a fixed electrode 10.11 at the end of the resistance wire 3 is provided,
A voltage is applied from the power source 12 through the resistor 13, and a divided voltage corresponding to the vertical position of the electrode 5 of the float 4 is obtained and applied to the display drive circuit 14, and the output drives, for example, a meter on the display section 16. to display the liquid level.

In this way, the float 4, which moves up and down along the resistance line 3, will always be at the center of the liquid level of the liquid 2 at any position in the liquid tank 1, so that the float 4, which moves up and down along the resistance line 3, will always be at the center of the liquid level of the liquid 2 at that time. Even if it is tilted, the height of the center of the liquid level of liquid 2 hardly changes, so the amount of liquid 2 can be detected accurately with little error despite such a tilt. . Therefore, if you install this liquid level meter in a liquid tank that may be tilted slightly from its normal position, such as a car's gasoline tank, by going up or down a slope, you can measure the remaining amount of liquid such as gasoline even when going up or down a slope. can always be detected accurately.

As described in detail above, according to the present invention, it is possible to obtain a useful liquid level meter that can accurately detect the liquid level with little error even if the liquid tank is tilted.

[Brief explanation of the drawing]

1 and 2 are schematic perspective views of a liquid meter according to an embodiment of the present invention, FIG. 3 is a cross-sectional front view of an example of a float used in the liquid meter, and FIG. 4 is a cross-sectional plan view thereof. .

Claims (1)

[Claims] A resistance line is provided along the center position of the cross section when the liquid tank is cut horizontally at an arbitrary position, and a float that moves up and down according to the liquid level in the liquid tank is provided along this resistance line. A liquid meter with a float provided with an electrode that contacts the resistance wire.